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.yxq-x{position:absolute;top:14px;right:14px;width:40px;height:40px;border:0;border-radius:50%;background:rgba(255,255,255,.12);color:#fff;font-size:24px;line-height:40px;cursor:pointer}.yxq .yxq-x:focus-visible{outline:2px solid #fff}\n.yxq .yxq-b{padding:22px 26px 26px;overflow:auto;max-height:calc(92vh - 110px)}\n@media(max-width:640px){.yxs{overflow-x:clip}.yxs table{display:block;max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}}\n@media(prefers-reduced-motion:reduce){dialog.yxq[open]{animation:none}.yxs .yx-img>a,.yxs .yx-img>a .ph img{transition:none}}\n<\/style><div class=\"yxs\">\n<section aria-label=\"Injection molding machine in the Yirox molding hall in Wuxi\" class=\"hero\" role=\"img\" style=\"background-image:linear-gradient(90deg,rgba(8,17,40,.93) 0%,rgba(8,17,40,.84) 48%,rgba(8,17,40,.5) 100%),url('https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/injection-molding-machine-yirox-molding-hall-wuxi.webp')\"><div class=\"c hc\"><nav aria-label=\"Breadcrumb\" class=\"crumb\"><a href=\"\/\">Home<\/a> <span>\/<\/span> <a href=\"\/capabilities\/\">Capabilities<\/a> <span>\/<\/span> Injection Molding<\/nav><span class=\"eyebrow\">Yirox Manufacturing Capabilities<\/span><h1>Automotive Plastic Injection Molding for Exterior&nbsp;Parts<\/h1><p class=\"lead\">Custom plastic injection molding for grilles, trim, bumper trim, lips, side skirts and large rear spoilers. Yirox runs 42 injection molding machines from 90 to 2,500 tons, three two-shot cells and an in-house mold shop at its IATF 16949 certified factory in Wuxi, China. Each program starts with a DFM review and ends with FAI, CMM data and PPAP up to Level 3.<\/p><div class=\"btns\"><a class=\"btn btn-r\" href=\"\/contact\/\">Get a Quote \u2192<\/a><a class=\"btn btn-o\" href=\"#faq\">Read the FAQ<\/a><\/div><\/div><\/section>\n<div class=\"stats\"><div class=\"c\"><div class=\"sg\"><div><strong>42<\/strong><span>Machines<\/span><\/div><div><strong>90\u20132,500 t<\/strong><span>Clamp force<\/span><\/div><div><strong>3<\/strong><span>Two-shot machines<\/span><\/div><div><strong>~1.5 M<\/strong><span>Parts per month<\/span><\/div><div><strong>\u00b10.5 mm<\/strong><span>Critical features<\/span><\/div><\/div><\/div><\/div>\n<section class=\"w\" id=\"injection-molding-at-a-glance\"><div class=\"c\"><span class=\"eb\">01 \u2014 Capability<\/span><h2>Injection Molding at a&nbsp;Glance<\/h2><div class=\"tw\"><table><thead><tr><th>Item<\/th><th>Yirox capability<\/th><\/tr><\/thead><tbody><tr><td>Machines<\/td><td>42 injection molding machines, clamp force 90\u20132,500 t (largest are two-platen)<\/td><\/tr><tr><td>Two-shot (2K) molding<\/td><td>3 machines: 280 t and 380 t rotary-table, 530 t rotary-core<\/td><\/tr><tr><td>Automation<\/td><td>Take-out robots on all 42 machines (30 three-axis, 12 five-axis); 6 with in-mold monitoring<\/td><\/tr><tr><td>Monthly capacity<\/td><td>About 1.5 million parts and 520 t of resin, two shifts of 16 hours<\/td><\/tr><tr><td>Materials<\/td><td>ABS, PP, modified PP, TPO, ASA, PC, PC\/ABS; 2K combinations PC+PMMA, ABS+TPE, PC\/ABS+TPU<\/td><\/tr><tr><td>Accuracy<\/td><td>\u00b11.0 mm general, \u00b10.5 mm on critical features, seams \u00b10.1 mm, part weight \u00b11 g<\/td><\/tr><tr><td>Mold shop<\/td><td>In-house, 6\u20138 molds per month, molds up to 25 t, P20\/H13 steel<\/td><\/tr><tr><td>Finishing<\/td><td>In-house painting lines and chrome plating line<\/td><\/tr><tr><td>Quality<\/td><td>ISO 9001, IATF 16949, FAI, CMM, PPAP up to Level 3<\/td><\/tr><tr><td>Order size<\/td><td>Low MOQ on selected items; confirmed in your quote<\/td><\/tr><\/tbody><\/table><\/div><div class=\"yx-kf\"><h3>Key facts about our injection molding<\/h3><ul><li>42 injection molding machines from 90 to 2,500 t, including 3 two-shot machines.<\/li><li>Large parts on 800\u20132,500 t machines, including 4 two-platen machines.<\/li><li>You receive a DFM report before tooling starts.<\/li><li>Mold making, 3D scanning and CNC machining in the same factory.<\/li><li>Two CMMs in-house, with PPAP up to Level 3.<\/li><li>Made in our IATF 16949 and ISO 9001 certified factory of about 20,000 m\u00b2 in Wuxi, China.<\/li><\/ul><\/div><p class=\"yx-intro\" style=\"margin-top:28px\">Choosing the resin comes before the mold. If a part needs more heat or impact resistance than ABS, compare <a href=\"\/materials\/pc-abs\/\">PC\/ABS for exterior parts<\/a>. If the project also needs packaging or repeat supply, start with our <a href=\"\/services\/\">auto parts manufacturing services<\/a>.<\/p><\/div><\/section>\n<section class=\"g\" id=\"what-is-plastic-injection-molding\"><div class=\"c\"><span class=\"eb\">02 \u2014 Explainer<\/span><h2>What Is Plastic Injection&nbsp;Molding?<\/h2><div class=\"split\"><div class=\"tx\"><p class=\"lede\">Plastic injection molding is a manufacturing process that melts plastic pellets and injects the melt under high pressure into a closed steel mold. The plastic cools inside the cavity, the mold opens and a finished part is ejected.<\/p><p class=\"lede\">The same mold then repeats the cycle, which is why injection molding is the standard process for plastic parts made in thousands or millions of identical pieces. Automotive injection molding adds tougher demands on fit, finish and weathering than most consumer parts.<\/p><\/div><figure class=\"fig\"><img loading=\"lazy\" alt=\"Injection molding machine with a take-out robot placing molded parts on a conveyor\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/injection-molding-machine-robot-part-removal-conveyor.webp\" width=\"1200\" title=\"\"><figcaption>Injection molding machine with a take-out robot placing molded parts on a conveyor<\/figcaption><\/figure><\/div><div class=\"cols2\"><p>For automotive exterior parts the process matters for more than cost. A front lip, grille or bumper trim must hold its shape on the vehicle, line up with body panels and keep a clean surface for paint or chrome.<\/p><p>Those results depend on how the part is designed, how the mold is built and how the molding process is controlled shot after shot. This page explains each step and shows the equipment Yirox uses to make it work.<\/p><p>If you want a longer guide to the process, defects and history of molding in the car industry, read our article on <a href=\"\/automotive-injection-molding\/\">automotive injection molding<\/a>. The rest of this page focuses on what you need to know as a buyer of molded exterior parts.<\/p><\/div><\/div><\/section>\n<section class=\"w\" id=\"how-the-injection-molding-process-works\"><div class=\"c\"><span class=\"eb\">03 \u2014 Explainer<\/span><h2>How the Injection Molding Process&nbsp;Works<\/h2><div class=\"split\"><div class=\"tx\"><p class=\"lede\">Every injection molded part goes through the same four stages. The settings for each stage are developed during mold trials and then locked into the production process sheet.<\/p><\/div><figure class=\"fig\"><img loading=\"lazy\" alt=\"Technician removing a molded bumper part from an injection molding machine\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/exterior-parts-injection-molding-factory.webp\" width=\"1200\" title=\"\"><figcaption>Technician removing a molded bumper part from an injection molding machine<\/figcaption><\/figure><\/div><ol class=\"steps s2x\"><li><span class=\"n\">01<\/span><h3>Clamping<\/h3><p>The two halves of the mold close and the machine holds them shut with clamp force. Large exterior parts need more tonnage because the projected area of the part is bigger.<\/p><\/li><li><span class=\"n\">02<\/span><h3>Injection<\/h3><p>Dried resin is melted in the heated barrel. The screw pushes the melt through the nozzle, runner and gates until the cavity is full.<\/p><\/li><li><span class=\"n\">03<\/span><h3>Packing and cooling<\/h3><p>Pressure is held while the plastic shrinks, then cooling water in the mold removes heat. Cooling is usually the longest part of the cycle.<\/p><\/li><li><span class=\"n\">04<\/span><h3>Ejection<\/h3><p>The mold opens and ejector pins or a robot remove the part. Runners are separated and the part moves to trimming, inspection or finishing.<\/p><\/li><\/ol><div class=\"tx2\"><div class=\"t\"><div class=\"prose\"><p>Before any of this happens, the resin must be dried. <a href=\"\/materials\/\">Materials<\/a> such as ABS, PC and PC\/ABS absorb moisture from the air, and wet resin causes silver streaks on the surface. Mold temperature also matters: a stable, correct mold temperature gives an even gloss and reduces warpage on long parts like side skirts.<\/p><\/div><\/div><aside class=\"kf\"><p class=\"kh\">Key facts<\/p><dl><div><dt>42<\/dt><dd>Molding machines, 90\u20132,500 t<\/dd><\/div><div><dt>4<\/dt><dd>Two-platen machines up to 2,500 t<\/dd><\/div><div><dt>~1.5 M<\/dt><dd>Parts per month<\/dd><\/div><\/dl><a href=\"\/contact\/\">Request a quote \u2192<\/a><\/aside><\/div><\/div><\/section>\n<section class=\"g\" id=\"types-of-injection-molding-we-use\"><div class=\"c\"><span class=\"eb\">04 \u2014 Explainer<\/span><h2>Types of Injection Molding We&nbsp;Use<\/h2><div class=\"cg g2\"><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"3\"><\/circle><path d=\"M12 2v3M12 19v3M2 12h3M19 12h3M5 5l2 2M17 17l2 2M5 19l2-2M17 7l2-2\"><\/path><\/svg><\/span><h3>Standard single-shot molding<\/h3><p>One material, one cavity or family of cavities, one cycle. This covers most exterior parts: grilles, mirror housings, door handle covers, fender flares, side skirts and spoiler bodies.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M12 2l9 5v10l-9 5-9-5V7z\"><\/path><path d=\"M12 12l9-5M12 12v10M12 12L3 7\"><\/path><\/svg><\/span><h3>Two-shot (2K) injection molding<\/h3><p>Two materials are molded into one part in a single cycle. A rotary table or rotary core moves the first shot to a second cavity, where the second material is molded onto it. We use it for combinations such as <a href=\"\/materials\/two-shot-tpe-tpu-pmma\/\">PC+PMMA, ABS+TPE and PC\/ABS+TPU<\/a>, for example a hard part with a soft seal or grip.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"9\"><\/circle><path d=\"M8 12l3 3 5-6\"><\/path><\/svg><\/span><h3>Overmolding with soft materials<\/h3><p>Like two-shot molding, overmolding bonds a soft TPE or TPU layer to a rigid substrate. It adds sealing, grip or noise damping without a separate assembly step. The material pair must be chosen for chemical bonding.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"3\"><\/circle><path d=\"M12 2v3M12 19v3M2 12h3M19 12h3M5 5l2 2M17 17l2 2M5 19l2-2M17 7l2-2\"><\/path><\/svg><\/span><h3>Large-part molding on two-platen machines<\/h3><p>Bumper trim and large rear spoilers need high clamp force and long mold openings. Our 1,300\u20132,500 t two-platen machines are used for these parts.<\/p><\/div><\/div><\/div><\/div><\/section>\n<section class=\"w\" id=\"pros-and-cons-of-injection-molding\"><div class=\"c\"><span class=\"eb\">05 \u2014 Explainer<\/span><h2>Pros and Cons of Injection&nbsp;Molding<\/h2><p class=\"lede\">Injection molding is the right choice for most plastic exterior parts, but not for every quantity. Here is a fair summary.<\/p><div class=\"tw\"><table><thead><tr><th>Advantages<\/th><th>Limitations<\/th><\/tr><\/thead><tbody><tr><td>Low cost per part once the mold is made<\/td><td>The mold is an up-front investment<\/td><\/tr><tr><td>Repeatable dimensions and weight from shot to shot<\/td><td>Design changes after the mold is cut cost time and money<\/td><\/tr><tr><td>Molded-in texture, color and clip features with no extra steps<\/td><td>Wall thickness, draft and ribs must follow design rules<\/td><\/tr><tr><td>Wide choice of engineering plastics for weather and impact<\/td><td>Very low quantities may suit other processes better<\/td><\/tr><tr><td>Parts can go straight to painting, chrome plating or assembly<\/td><td>Large parts need high-tonnage machines and big molds<\/td><\/tr><\/tbody><\/table><\/div><div class=\"tx2\"><div class=\"t\"><div class=\"prose\"><p>For very small quantities or early design checks, other processes may be better. We have an SLA printer for quick form checks, and partner factories for vacuum casting and vacuum or thermoforming. When volumes are steady, injection molding gives the lowest cost and the most consistent parts.<\/p><\/div><\/div><aside class=\"kf\"><p class=\"kh\">Key facts<\/p><dl><div><dt>Low MOQ<\/dt><dd>On selected items<\/dd><\/div><div><dt>28-tank<\/dt><dd>Chrome plating line<\/dd><\/div><div><dt>\u00b10.5 mm<\/dt><dd>Critical features<\/dd><\/div><\/dl><a href=\"\/contact\/\">Request a quote \u2192<\/a><\/aside><\/div><\/div><\/section>\n<section class=\"g\" id=\"design-guidelines-for-injection-molded-exterior-parts\"><div class=\"c\"><span class=\"eb\">06 \u2014 Explainer<\/span><h2>Design Guidelines for Injection Molded Exterior&nbsp;Parts<\/h2><p class=\"lede\">Good design for manufacturing (DFM) is the cheapest way to avoid problems. These are general guidelines used across the injection molding industry. Our engineers check each one against your part in the DFM report.<\/p><figure class=\"fig wide\"><img loading=\"lazy\" alt=\"DFM wall-thickness analysis of an exterior plastic part on a monitor\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/dfm-analysis-wall-thickness-heatmap-exterior-part-cad.webp\" width=\"1200\" title=\"\"><figcaption>DFM wall-thickness analysis of an exterior plastic part on a monitor<\/figcaption><\/figure><div class=\"cg g3\"><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><rect height=\"13\" rx=\"2\" width=\"18\" x=\"3\" y=\"7\"><\/rect><path d=\"M8 7V4h8v3M3 12h18\"><\/path><\/svg><\/span><h3>Keep wall thickness uniform<\/h3><p>Thick and thin areas cool at different speeds, which causes sink marks and warpage. Keep walls as even as possible and core out thick sections. Change thickness gradually rather than in a step.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"3\"><\/circle><path d=\"M12 2v3M12 19v3M2 12h3M19 12h3M5 5l2 2M17 17l2 2M5 19l2-2M17 7l2-2\"><\/path><\/svg><\/span><h3>Add draft to vertical walls<\/h3><p>Draft is a small taper that lets the part release from the mold. Smooth surfaces need less draft than textured surfaces, because texture grips the steel. Deep textures need extra draft, which we confirm against the texture you choose.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M4 20h16M6 16V9M11 16V5M16 16v-7M20 16v-4\"><\/path><\/svg><\/span><h3>Design ribs and bosses correctly<\/h3><p>Ribs add stiffness without making walls thick. A rib that is too thick shows as a sink mark on the visible face. Clip towers and screw bosses should connect to walls with ribs rather than solid plastic.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"9\"><\/circle><path d=\"M8 12l3 3 5-6\"><\/path><\/svg><\/span><h3>Plan clips and fasteners early<\/h3><p>Exterior trim often uses clips or tape. Clip features need room for slides or lifters in the mold. Deciding fixing points early avoids expensive mold changes.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"9\"><\/circle><path d=\"M8 12l3 3 5-6\"><\/path><\/svg><\/span><h3>Choose gate locations with the finish in mind<\/h3><p>The gate is where plastic enters the part. Gate marks and weld lines should sit on hidden faces, or where paint or texture can cover them. On painted or chrome plated parts this matters even more.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"3\"><\/circle><path d=\"M12 2v3M12 19v3M2 12h3M19 12h3M5 5l2 2M17 17l2 2M5 19l2-2M17 7l2-2\"><\/path><\/svg><\/span><h3>Allow for shrinkage and warpage<\/h3><p>Every plastic shrinks as it cools, and long thin parts tend to bow. Mold flow analysis, rib layout and cooling design help keep a side skirt or spoiler straight enough to fit the car.<\/p><\/div><\/div><\/div><\/div><\/section>\n<section class=\"w\" id=\"mold-flow-analysis-and-dfm-before-steel-is-cut\"><div class=\"c\"><span class=\"eb\">07 \u2014 Explainer<\/span><h2>Mold Flow Analysis and DFM Before Steel Is&nbsp;Cut<\/h2><div class=\"tx2\"><div class=\"t\"><p class=\"lede\">Mold flow analysis is a computer simulation of how molten plastic fills, packs and cools inside the mold. It is run during DFM, before the mold steel is cut, so problems are fixed on screen instead of in a hardened tool. For long exterior parts such as side skirts, spoilers and bumper trim, it is one of the most useful checks in the whole project.<\/p><\/div><aside class=\"kf\"><p class=\"kh\">Key facts<\/p><dl><div><dt>IATF 16949<\/dt><dd>+ ISO 9001<\/dd><\/div><div><dt>2010<\/dt><dd>Founded in Wuxi, China<\/dd><\/div><div><dt>~20,000 m\u00b2<\/dt><dd>Wuxi factory<\/dd><\/div><\/dl><a href=\"\/contact\/\">Request a quote \u2192<\/a><\/aside><\/div><div class=\"cg g2\"><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"3\"><\/circle><path d=\"M12 2v3M12 19v3M2 12h3M19 12h3M5 5l2 2M17 17l2 2M5 19l2-2M17 7l2-2\"><\/path><\/svg><\/span><h3>What the simulation looks at<\/h3><ul class=\"mini\"><li><strong>Fill.<\/strong> How the melt front moves through the cavity, where it fills last, and whether any thin area risks a short shot.<\/li><li><strong>Pack.<\/strong> How much pressure is needed to pack the part, and whether thick areas can be packed out before the gate freezes.<\/li><li><strong>Cool.<\/strong> How evenly the part cools, and where hot spots in the mold may slow the cycle or cause distortion.<\/li><li><strong>Warp.<\/strong> A prediction of how the part will bend or twist after ejection, based on shrinkage, fiber or flow direction and cooling.<\/li><\/ul><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M14 3h7v7M21 3l-9 9M10 5H4v15h15v-6\"><\/path><\/svg><\/span><h3>Gate location and gate count<\/h3><p>Gate position decides how the part fills, where weld lines appear and how it warps. On a visible gloss black part, gates are placed on hidden faces or edges, and on long parts several gates or a hot runner with sequential valve gates may be compared in the simulation.<\/p><\/div><\/div><\/div><div class=\"yx-cta\"><p><strong>Want risks found before steel is cut?<\/strong>Send your 3D file and we will review gates, wall thickness and shrinkage with a DFM report before injection molding tooling starts.<\/p><button type=\"button\" class=\"btn btn-r\" data-yxq data-yxq-h=\"Request a DFM and Mold Flow Review\" data-yxq-s=\"Attach your 3D file and tell us the material and finish you have in mind.\" aria-haspopup=\"dialog\">Request a DFM and Mold Flow Review \u2192<\/button><\/div><\/div><\/section>\n<section class=\"g\" id=\"defects-mold-flow-helps-predict\"><div class=\"c\"><span class=\"eb\">08 \u2014 Explainer<\/span><h2>Defects Mold Flow Helps&nbsp;Predict<\/h2><p class=\"lede\">The simulation flags the defects below before the mold exists, so the fix is a design change rather than a tool correction.<\/p><div class=\"tw\"><table><thead><tr><th>Risk<\/th><th>What the analysis shows<\/th><th>Typical fix in design<\/th><th><\/th><\/tr><\/thead><tbody><tr><td>Weld lines<\/td><td>Where two flow fronts meet<\/td><td>Move the gate or add a flow leader so lines fall on hidden or painted faces<\/td><td><\/td><\/tr><tr><td>Sink marks<\/td><td>Thick areas that shrink after the surface sets<\/td><td>Core out thick sections, thin ribs and bosses<\/td><td><\/td><\/tr><tr><td>Warpage<\/td><td>Uneven shrinkage along the part<\/td><td>Change gate position, rib layout or cooling channels<\/td><td><\/td><\/tr><tr><td>Air traps<\/td><td>Pockets the melt closes around<\/td><td>Add venting at the predicted spots<\/td><td><\/td><\/tr><tr><td>Short shots<\/td><td>Areas that fill last at low pressure<\/td><td>Adjust wall thickness or add gates<\/td><td><\/td><\/tr><tr><td>Gate blush and jetting<\/td><td>High shear near the gate<\/td><td>Change gate type or size<\/td><td><\/td><\/tr><\/tbody><\/table><\/div><\/div><\/section>\n<section class=\"w\" id=\"from-simulation-to-the-t1-mold-trial\"><div class=\"c\"><span class=\"eb\">09 \u2014 Explainer<\/span><h2>From Simulation to the T1 Mold&nbsp;Trial<\/h2><p class=\"lede\">Results from the analysis go straight into the mold design and are checked again on the first trial shots.<\/p><ol class=\"steps s3\"><li><span class=\"n\">01<\/span><h3>Part review<\/h3><p>Wall thickness, draft and ribs are checked against the material.<\/p><\/li><li><span class=\"n\">02<\/span><h3>Simulation<\/h3><p>Fill, pack, cool and warp are run with the planned gates.<\/p><\/li><li><span class=\"n\">03<\/span><h3>Design changes<\/h3><p>Gates, ribs, venting and cooling are adjusted on the CAD and mold design.<\/p><\/li><li><span class=\"n\">04<\/span><h3>Mold build<\/h3><p>The mold is built to the reviewed design.<\/p><\/li><li><span class=\"n\">05<\/span><h3>T1 trial<\/h3><p>First shots are compared with the predicted weld lines, sink and warpage.<\/p><\/li><li><span class=\"n\">06<\/span><h3>Correction<\/h3><p>Steel is adjusted where needed before the next trial and sample approval.<\/p><\/li><\/ol><div class=\"prose\"><p>Simulation does not replace a mold trial, but it reduces the number of corrections after T1. Results and the agreed changes are shared with you in the DFM report.<\/p><\/div><\/div><\/section>\n<section class=\"g\" id=\"materials-for-injection-molded-exterior-parts\"><div class=\"c\"><span class=\"eb\">10 \u2014 Explainer<\/span><h2>Materials for Injection Molded Exterior&nbsp;Parts<\/h2><div class=\"split rev\"><div class=\"tx\"><p class=\"lede\">The right resin depends on where the part sits on the vehicle, whether it will be painted or plated, and how much impact and sunlight it must handle. These are the materials we mold for exterior parts.<\/p><\/div><figure class=\"fig\"><img loading=\"lazy\" alt=\"Black plastic resin pellets beside a gloss black molded part\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/black-plastic-resin-pellets-and-molded-gloss-part.webp\" width=\"1200\" title=\"\"><figcaption>Black plastic resin pellets beside a gloss black molded part<\/figcaption><\/figure><\/div><div class=\"tw\"><table><thead><tr><th>Material<\/th><th>Typical exterior uses<\/th><th>Notes<\/th><\/tr><\/thead><tbody><tr><td>ABS<\/td><td>Spoilers, grilles, mirror housings, trim<\/td><td>Rigid and easy to paint; plating-grade ABS is used for chrome plated parts<\/td><\/tr><tr><td>PP and modified PP<\/td><td>Bumper trim, fender flares, mud flaps<\/td><td>Tough and flexible; needs surface treatment and primer before painting<\/td><\/tr><tr><td>TPO<\/td><td>Flexible exterior trim<\/td><td>Good impact resistance in cold weather<\/td><\/tr><tr><td>ASA<\/td><td>Trim left in molded black<\/td><td>Better UV resistance than ABS for unpainted parts<\/td><\/tr><tr><td>PC<\/td><td>Clear or tough parts<\/td><td>High impact strength; often used in two-shot with PMMA<\/td><\/tr><tr><td>PC\/ABS<\/td><td>Housings and structural trim<\/td><td>Balance of toughness and heat resistance; not suitable for chrome plating<\/td><\/tr><tr><td>TPE and TPU<\/td><td>Second shot in 2K or overmolding<\/td><td>Soft seals, grips and edges bonded to ABS, PC\/ABS or PC<\/td><\/tr><\/tbody><\/table><\/div><div class=\"prose\"><p>If you are unsure which material to choose, send us the part function and the market it will be sold in. We will suggest a resin and finish in the DFM report.<\/p><\/div><\/div><\/section>\n<section class=\"w\" id=\"tolerances-and-dimensional-accuracy\"><div class=\"c\"><span class=\"eb\">11 \u2014 Explainer<\/span><h2>Tolerances and Dimensional&nbsp;Accuracy<\/h2><p class=\"lede\">Exterior parts must fit the vehicle and line up with nearby panels. These are the accuracy levels we work to on molded exterior parts.<\/p><div class=\"tw\"><table><thead><tr><th>Feature<\/th><th>Tolerance<\/th><\/tr><\/thead><tbody><tr><td>General dimensions<\/td><td>\u00b11.0 mm<\/td><\/tr><tr><td>Critical features (clip points, mating edges)<\/td><td>\u00b10.5 mm<\/td><\/tr><tr><td>Seams and gaps between mating parts<\/td><td>\u00b10.1 mm<\/td><\/tr><tr><td>Part weight<\/td><td>\u00b11 g, with unit-to-unit variation of 0.3% or less<\/td><\/tr><\/tbody><\/table><\/div><div class=\"prose\"><p>Critical features are agreed with you during DFM and marked on the inspection plan. They are checked by CMM at first article and by checking fixture during production. See our <a href=\"\/capabilities\/quality-inspection-cmm\/\">quality inspection and CMM<\/a> page for how we measure.<\/p><\/div><\/div><\/section>\n<section class=\"g\" id=\"molded-in-finish-vs-painted-vs-chrome-plated\"><div class=\"c\"><span class=\"eb\">12 \u2014 Explainer<\/span><h2>Molded-in Finish vs Painted vs Chrome&nbsp;Plated<\/h2><p class=\"lede\">Many exterior parts can be finished straight from the mold. Others need paint or chrome. Choosing early affects material, gate location and texture.<\/p><figure class=\"fig wide\"><img loading=\"lazy\" alt=\"Gloss black injection-molded rear spoiler shown full length on an inspection table\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/gloss-black-rear-spoiler-full-length-inspection-table.webp\" width=\"1200\" title=\"\"><figcaption>Gloss black injection-molded rear spoiler<\/figcaption><\/figure><div class=\"cg g3\"><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><rect height=\"13\" rx=\"2\" width=\"18\" x=\"3\" y=\"7\"><\/rect><path d=\"M8 7V4h8v3M3 12h18\"><\/path><\/svg><\/span><h3>Molded-in color and texture<\/h3><p>The part comes out of the mold in black or another color, often with a grained texture. This is common for trim and fender flares in ASA, PP or TPO. It is the lowest-cost finish.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M12 2l9 5v10l-9 5-9-5V7z\"><\/path><path d=\"M12 12l9-5M12 12v10M12 12L3 7\"><\/path><\/svg><\/span><h3>Painted<\/h3><p>Gloss black, body color or other colors are sprayed in our paint shop. Painted parts need clean, sink-free surfaces. Read more on our <a href=\"\/capabilities\/painting-surface-finishing\/\">painting and surface finishing<\/a> page.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M4 4h16v12H8l-4 4z\"><\/path><\/svg><\/span><h3>Chrome plated<\/h3><p>Grille bars, badges and trim can be chrome plated on plating-grade ABS. The part design and material must suit plating from the start. See <a href=\"\/capabilities\/chrome-plating\/\">chrome plating on plastic<\/a>.<\/p><\/div><\/div><\/div><\/div><\/section>\n<section class=\"w\" id=\"common-injection-molding-defects-and-how-we-prevent-them\"><div class=\"c\"><span class=\"eb\">13 \u2014 Explainer<\/span><h2>Common Injection Molding Defects and How We Prevent&nbsp;Them<\/h2><div class=\"split rev\"><div class=\"tx\"><p class=\"lede\">Most defects come from part design, mold design or process settings. We review the risk in DFM and confirm the fix during mold trials.<\/p><\/div><figure class=\"fig\"><img loading=\"lazy\" alt=\"Gloss black rear diffuser clamped on a checking fixture for dimensional inspection\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/rear-diffuser-checking-fixture-dimensional-inspection.webp\" width=\"1200\" title=\"\"><figcaption>Gloss black rear diffuser clamped on a checking fixture for dimensional inspection<\/figcaption><\/figure><\/div><div class=\"tw\"><table><thead><tr><th>Defect<\/th><th>What it looks like<\/th><th>How we prevent it<\/th><\/tr><\/thead><tbody><tr><td>Sink marks<\/td><td>Shallow dents over thick areas or ribs<\/td><td>Even wall thickness, correct rib ratio, adequate packing pressure<\/td><\/tr><tr><td>Warpage<\/td><td>Long parts bow or twist<\/td><td>Balanced cooling, rib layout, mold temperature control<\/td><\/tr><tr><td>Flash<\/td><td>Thin plastic film at the parting line<\/td><td>Correct clamp force, mold fit and maintenance<\/td><\/tr><tr><td>Weld lines<\/td><td>Visible line where melt fronts meet<\/td><td>Gate position, melt and mold temperature<\/td><\/tr><tr><td>Short shots<\/td><td>Part not fully filled<\/td><td>Gate size, venting, injection speed<\/td><\/tr><tr><td>Splay or silver streaks<\/td><td>Silver streaks on the surface<\/td><td>Resin drying with desiccant dryers<\/td><\/tr><tr><td>Gloss variation<\/td><td>Uneven shine across the part<\/td><td>Stable mold temperature and polish<\/td><\/tr><\/tbody><\/table><\/div><\/div><\/section>\n<section class=\"g\" id=\"exterior-parts-we-mold\"><div class=\"c\"><span class=\"eb\">14 \u2014 Explainer<\/span><h2>Exterior Parts We&nbsp;Mold<\/h2><p class=\"lede\">These are the exterior parts we mold most often, grouped by machine size.<\/p><figure class=\"fig wide\"><img loading=\"lazy\" alt=\"Gloss black front lip, spoiler, side skirts and rear diffuser\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/yirox-exterior-styling-parts-front-lip-spoiler-side-skirts-diffuser.webp\" width=\"1200\" title=\"\"><figcaption>Gloss black front lip, spoiler, side skirts and rear diffuser<\/figcaption><\/figure><div class=\"cg g3\"><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M3 12h4l3 7 4-14 3 7h4\"><\/path><\/svg><\/span><h3>Clips, brackets and small trim<\/h3><p>Small parts that hold larger parts in place or finish an edge. They run on 90\u2013250 t machines, often in multi-cavity molds.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"3\"><\/circle><path d=\"M12 2v3M12 19v3M2 12h3M19 12h3M5 5l2 2M17 17l2 2M5 19l2-2M17 7l2-2\"><\/path><\/svg><\/span><h3>Grilles and mirror housings<\/h3><p>Visible parts with fine detail and good surface quality. Many are painted gloss black or chrome plated after molding. They run on 250\u2013450 t machines.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"3\"><\/circle><path d=\"M12 2v3M12 19v3M2 12h3M19 12h3M5 5l2 2M17 17l2 2M5 19l2-2M17 7l2-2\"><\/path><\/svg><\/span><h3>Door handle covers<\/h3><p>Small visible covers that are often painted or chrome plated. Surface quality and fit to the handle are checked closely.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M12 2l9 5v10l-9 5-9-5V7z\"><\/path><path d=\"M12 12l9-5M12 12v10M12 12L3 7\"><\/path><\/svg><\/span><h3>Fender flares and side skirts<\/h3><p>Long parts where straightness and fit matter. They run on 450\u2013800 t machines with careful cooling design to control warpage.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"9\"><\/circle><path d=\"M8 12l3 3 5-6\"><\/path><\/svg><\/span><h3>Spoiler bodies and front lips<\/h3><p>Styling parts with large visible surfaces, usually painted. Front lips run on 800\u20131,300 t machines.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M12 2l9 5v10l-9 5-9-5V7z\"><\/path><path d=\"M12 12l9-5M12 12v10M12 12L3 7\"><\/path><\/svg><\/span><h3>Bumper trim and large rear spoilers<\/h3><p>The largest parts we mold, on 1,300\u20132,500 t two-platen machines.<\/p><\/div><\/div><\/div><\/div><\/section>\n<section class=\"w\" id=\"who-uses-our-injection-molding-services\"><div class=\"c\"><span class=\"eb\">15 \u2014 Service<\/span><h2>Who Uses Our Injection Molding&nbsp;Services<\/h2><p class=\"lede\">We mold exterior parts for automotive brands, aftermarket brands and distributors. Some buyers bring a finished design; others need help from the first sketch.<\/p><figure class=\"fig wide\"><img loading=\"lazy\" alt=\"Operator handling a black injection-molded bumper part beside a molding machine\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/injection-molded-bumper-part-production-wuxi-factory.webp\" width=\"1200\" title=\"\"><figcaption>Operator handling a black injection-molded bumper part beside a molding machine<\/figcaption><\/figure><div class=\"cg g3\"><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M4 20h16M6 16V9M11 16V5M16 16v-7M20 16v-4\"><\/path><\/svg><\/span><h3>Aftermarket brands<\/h3><p>Body kits, spoilers, lips and trim for vehicle-specific product lines, often combined with our <a href=\"\/services\/vehicle-specific-development\/\">vehicle-specific development<\/a> service.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M14 3h7v7M21 3l-9 9M10 5H4v15h15v-6\"><\/path><\/svg><\/span><h3>OEM and ODM programs<\/h3><p>Molded parts built to your drawings and standards, with PPAP documents. See <a href=\"\/auto-parts-oem-service\/\">OEM and ODM auto parts<\/a>.<\/p><\/div><\/div><div class=\"icc\"><div class=\"icb\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M12 2l9 5v10l-9 5-9-5V7z\"><\/path><path d=\"M12 12l9-5M12 12v10M12 12L3 7\"><\/path><\/svg><\/span><h3>Distributors and private label<\/h3><p>Repeat supply of molded and finished parts under your brand, packed for retail or warehouse. See <a href=\"\/services\/private-label-packaging\/\">private label and packaging<\/a>.<\/p><\/div><\/div><\/div><\/div><\/section>\n<section class=\"g\" id=\"what-you-get-when-you-work-with-us\"><div class=\"c\"><span class=\"eb\">16 \u2014 Service<\/span><h2>What You Get When You Work With&nbsp;Us<\/h2><div class=\"fg g3\"><div class=\"fc\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><rect height=\"13\" rx=\"2\" width=\"18\" x=\"3\" y=\"7\"><\/rect><path d=\"M8 7V4h8v3M3 12h18\"><\/path><\/svg><\/span><h4>DFM report<\/h4><p>Comments on wall thickness, draft, gates, parting lines and texture before steel is cut.<\/p><\/div><div class=\"fc\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"3\"><\/circle><path d=\"M12 2v3M12 19v3M2 12h3M19 12h3M5 5l2 2M17 17l2 2M5 19l2-2M17 7l2-2\"><\/path><\/svg><\/span><h4>Mold built in-house<\/h4><p>Our mold shop builds and maintains the tool. See <a href=\"\/services\/tooling-sampling\/\">tooling and sampling<\/a>.<\/p><\/div><div class=\"fc\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M14 3h7v7M21 3l-9 9M10 5H4v15h15v-6\"><\/path><\/svg><\/span><h4>Trial samples<\/h4><p>T1 samples for fit and finish checks, with changes until approval.<\/p><\/div><div class=\"fc\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M3 12h4l3 7 4-14 3 7h4\"><\/path><\/svg><\/span><h4>FAI and CMM data<\/h4><p>First article inspection against your drawing before production.<\/p><\/div><div class=\"fc\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M4 4h16v12H8l-4 4z\"><\/path><\/svg><\/span><h4>PPAP up to Level 3<\/h4><p>When your program requires it.<\/p><\/div><div class=\"fc\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M12 2l9 5v10l-9 5-9-5V7z\"><\/path><path d=\"M12 12l9-5M12 12v10M12 12L3 7\"><\/path><\/svg><\/span><h4>Finishing in the same factory<\/h4><p>Painting and chrome plating without shipping parts between suppliers.<\/p><\/div><\/div><\/div><\/section>\n<section class=\"w\" id=\"from-drawing-to-production-our-workflow\"><div class=\"c\"><span class=\"eb\">17 \u2014 Service<\/span><h2>From Drawing to Production: Our&nbsp;Workflow<\/h2><figure class=\"fig wide\"><img loading=\"lazy\" alt=\"Technical drawing, 3D CAD model and front lip sample with calipers\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/oem-brief-technical-drawing-cad-model-front-lip-sample.webp\" width=\"1200\" title=\"\"><figcaption>Technical drawing, 3D CAD model and front lip sample with calipers<\/figcaption><\/figure><ol class=\"steps s3\"><li><span class=\"n\">01<\/span><h3>Quote and NDA<\/h3><p>You send 3D data or a sample. We sign an NDA if needed and quote the mold and part price.<\/p><\/li><li><span class=\"n\">02<\/span><h3>DFM review<\/h3><p>Our engineers send a DFM report and agree material, finish and critical features with you.<\/p><\/li><li><span class=\"n\">03<\/span><h3>Mold build<\/h3><p>The mold is built in our mold shop and checked before the first trial.<\/p><\/li><li><span class=\"n\">04<\/span><h3>T1 sampling<\/h3><p>First trial parts are molded, measured and sent for your review and test fit.<\/p><\/li><li><span class=\"n\">05<\/span><h3>Approval and FAI<\/h3><p>After any changes, final samples are approved with FAI, CMM data and PPAP if required.<\/p><\/li><li><span class=\"n\">06<\/span><h3>Production<\/h3><p>Process settings are locked and parts run with in-process checks, finishing and packing.<\/p><\/li><\/ol><\/div><\/section>\n<section class=\"g\" id=\"what-to-send-for-an-injection-molding-quote\"><div class=\"c\"><span class=\"eb\">18 \u2014 Service<\/span><h2>What to Send for an Injection Molding&nbsp;Quote<\/h2><p class=\"lede\">A complete request gets a faster and more accurate quote. If you do not have everything, send what you have and we will tell you what is missing.<\/p><ul class=\"tiles g3\"><li>3D CAD files (STEP or IGES) and 2D drawings with tolerances<\/li><li>A sample part, if there is no CAD; we can 3D scan it<\/li><li>Material, color and finish requirements<\/li><li>Annual quantity and expected order size<\/li><li>Target market and any test standards<\/li><li>Packaging and labeling needs<\/li><\/ul><div class=\"prose\"><p>Order quantity: we offer low MOQ on selected items. The exact quantity depends on the part, material and finish and is confirmed in your quote.<\/p><\/div><div class=\"yx-cta\"><p><strong>Have your injection molding files ready?<\/strong>Send them with the target quantity and we will quote plastic injection molding tooling and parts.<\/p><button type=\"button\" class=\"btn btn-r\" data-yxq data-yxq-h=\"Get an Injection Molding Quote\" data-yxq-s=\"Attach your 3D file or drawing and add material, finish and annual quantity.\" aria-haspopup=\"dialog\">Get an Injection Molding Quote \u2192<\/button><\/div><\/div><\/section>\n<section class=\"w\" id=\"what-drives-injection-molding-cost\"><div class=\"c\"><span class=\"eb\">19 \u2014 Service<\/span><h2>What Drives Injection Molding&nbsp;Cost<\/h2><p class=\"lede\">Buyers often ask why two similar-looking parts have different prices. These are the main cost drivers, in order of impact.<\/p><div class=\"tw\"><table><thead><tr><th>Cost driver<\/th><th>Why it matters<\/th><\/tr><\/thead><tbody><tr><td>Mold size and complexity<\/td><td>Slides, lifters and large steel blocks add machining time<\/td><\/tr><tr><td>Number of cavities<\/td><td>More cavities cost more up front but lower the part price<\/td><\/tr><tr><td>Part size and tonnage<\/td><td>Larger machines cost more per hour<\/td><\/tr><tr><td>Cycle time<\/td><td>Thick walls cool slowly, which lowers output per hour<\/td><\/tr><tr><td>Material<\/td><td>Engineering resins such as PC\/ABS cost more than PP<\/td><\/tr><tr><td>Finish<\/td><td>Painting or chrome plating adds process steps and inspection<\/td><\/tr><tr><td>Quantity<\/td><td>Set-up and inspection costs are shared across more parts<\/td><\/tr><\/tbody><\/table><\/div><div class=\"prose\"><p>You can lower cost by keeping walls even, avoiding undercuts where possible and choosing molded-in finishes for hidden or textured parts. We point out these savings in the DFM report.<\/p><\/div><\/div><\/section>\n<section class=\"g\" id=\"choosing-an-injection-molding-manufacturer-in-china\"><div class=\"c\"><span class=\"eb\">20 \u2014 Service<\/span><h2>Choosing an Injection Molding Manufacturer in&nbsp;China<\/h2><p class=\"lede\">Many buyers search for an injection molding company in China because of cost and supply chain depth. Price is only part of the decision. These are the questions worth asking any supplier, including us.<\/p><figure class=\"fig wide\"><img loading=\"lazy\" alt=\"Yirox headquarters and factory building in Wuxi, China\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/06\/yirox-factory-image.webp\" width=\"1200\" title=\"\"><figcaption>Yirox headquarters and factory building in Wuxi, China<\/figcaption><\/figure><ul class=\"tiles g3\"><li>Does the factory own its molding machines, or subcontract molding?<\/li><li>Is there an in-house mold shop for repairs and changes?<\/li><li>Which tonnage range is available for your largest part?<\/li><li>Is painting or plating done in-house or by another company?<\/li><li>Which certifications does the quality system hold?<\/li><li>Can the factory supply FAI, CMM reports and PPAP documents?<\/li><li>Will they sign an NDA and agree mold ownership in writing?<\/li><\/ul><div class=\"tx2\"><div class=\"t\"><div class=\"prose\"><p>At Yirox the answer to the first five is in-house: molding, mold shop, painting and chrome plating are all run in our own factory in Wuxi. Our quality system is certified to ISO 9001 and IATF 16949, and we supply FAI, CMM data and PPAP up to Level 3.<\/p><p>Processes we do not run ourselves, such as sheet metal and aluminum die casting, are handled by partner factories that we manage.<\/p><\/div><\/div><aside class=\"kf\"><p class=\"kh\">Key facts<\/p><dl><div><dt>PPAP<\/dt><dd>Up to Level 3<\/dd><\/div><div><dt>2<\/dt><dd>Paint lines, 3C2B system<\/dd><\/div><div><dt>2 CMMs<\/dt><dd>Plus checking fixtures<\/dd><\/div><\/dl><a href=\"\/contact\/\">Request a quote \u2192<\/a><\/aside><\/div><\/div><\/section>\n<section class=\"w\" id=\"our-injection-molding-machines\"><div class=\"c\"><span class=\"eb\">21 \u2014 Capability<\/span><h2>Our Injection Molding&nbsp;Machines<\/h2><p class=\"lede\">We run 42 injection molding machines with clamp force from 90 to 2,500 tons. Each tonnage group is matched to the size of the parts it molds.<\/p><figure class=\"fig wide\"><img loading=\"lazy\" alt=\"Overhead view of the Yirox injection molding hall with molding machines and parts storage\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/injection-molding-hall-overhead-view-yirox-wuxi.webp\" width=\"1200\" title=\"\"><figcaption>Overhead view of the Yirox injection molding hall with molding machines and parts storage<\/figcaption><\/figure><div class=\"tw\"><table><thead><tr><th>Clamp force<\/th><th>Machines<\/th><th>Typical parts<\/th><\/tr><\/thead><tbody><tr><td>90\u2013250 t<\/td><td>12<\/td><td>Clips, brackets, small trim strips<\/td><\/tr><tr><td>250\u2013450 t<\/td><td>11<\/td><td>Grilles, mirror housings, door handle covers<\/td><\/tr><tr><td>450\u2013800 t<\/td><td>10<\/td><td>Fender flares, side skirts, spoiler bodies<\/td><\/tr><tr><td>800\u20131,300 t<\/td><td>5<\/td><td>Front lips, large trim panels<\/td><\/tr><tr><td>1,300\u20132,500 t (two-platen)<\/td><td>4<\/td><td>Bumper trim, large rear spoilers<\/td><\/tr><\/tbody><\/table><\/div><\/div><\/section>\n<section class=\"g\" id=\"two-shot-molding-automation-and-auxiliary-equipment\"><div class=\"c\"><span class=\"eb\">22 \u2014 Capability<\/span><h2>Two-shot Molding, Automation and Auxiliary&nbsp;Equipment<\/h2><p class=\"lede\">Consistent parts come from more than the molding machine. Robots, temperature control and dry resin all reduce variation.<\/p><figure class=\"fig wide\"><img loading=\"lazy\" alt=\"Two-shot molded parts with a rigid black body and soft grey TPE edge\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/two-shot-molded-parts-rigid-and-soft-tpe.webp\" width=\"1200\" title=\"\"><figcaption>Two-shot molded parts with a rigid black body and soft grey TPE edge<\/figcaption><\/figure><div class=\"tw\"><table><thead><tr><th>Equipment<\/th><th>Quantity and details<\/th><\/tr><\/thead><tbody><tr><td>Two-shot machines<\/td><td>280 t rotary-table, 380 t rotary-table, 530 t rotary-core<\/td><\/tr><tr><td>2K material combinations<\/td><td>PC+PMMA, ABS+TPE, PC\/ABS+TPU<\/td><\/tr><tr><td>Take-out robots<\/td><td>On all 42 machines: 30 three-axis, 12 five-axis<\/td><\/tr><tr><td>In-mold monitoring<\/td><td>6 machines<\/td><\/tr><tr><td>Mold temperature controllers<\/td><td>46<\/td><\/tr><tr><td>Central chiller units<\/td><td>8<\/td><\/tr><tr><td>Desiccant dryers<\/td><td>30<\/td><\/tr><tr><td>Shifts<\/td><td>Two shifts, 16 hours per day<\/td><\/tr><tr><td>Monthly output<\/td><td>About 1.5 million parts, 520 t of resin<\/td><\/tr><\/tbody><\/table><\/div><div class=\"prose\"><p>Robots remove every part the same way, at the same time in the cycle, which keeps cooling and handling consistent. In-mold monitoring on selected machines watches each shot so a bad cycle is caught early.<\/p><\/div><\/div><\/section>\n<section class=\"w\" id=\"mold-shop-and-machining-support\"><div class=\"c\"><span class=\"eb\">23 \u2014 Capability<\/span><h2>Mold Shop and Machining&nbsp;Support<\/h2><div class=\"split\"><div class=\"tx\"><p class=\"lede\">Our mold shop is in the same factory as molding, so tool changes and repairs are fast. It builds 6\u20138 molds per month, handles molds up to 25 t and uses P20 and H13 steel, with mold life of 300,000\u2013500,000 shots depending on the steel and part.<\/p><div class=\"prose\"><p>The mold shop is supported by four 3-axis machining centers (800\u00d7500\u00d7500 mm, \u00b10.01 mm), two CNC lathes, two engraving-milling machines, two wire EDM machines, two EDM machines and two surface grinders. Our fixture shop builds checking fixtures with MSA %GRR of 10% or less. See <a href=\"\/services\/tooling-sampling\/\">tooling and sampling<\/a> for how molds are developed and approved.<\/p><\/div><\/div><figure class=\"fig\"><img loading=\"lazy\" alt=\"CNC machining center milling a steel injection mold cavity\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/cnc-milling-injection-mold-cavity-steel.webp\" width=\"1200\" title=\"\"><figcaption>CNC machining center milling a steel injection mold cavity<\/figcaption><\/figure><\/div><\/div><\/section>\n<section class=\"g\" id=\"quality-control-for-molded-parts\"><div class=\"c\"><span class=\"eb\">24 \u2014 Capability<\/span><h2>Quality Control for Molded&nbsp;Parts<\/h2><p class=\"lede\">Every molded program has an inspection plan agreed with you. First articles are measured on our CMMs, production parts are checked on checking fixtures, and appearance is checked against an approved sample.<\/p><div class=\"side\"><figure class=\"fig\"><img loading=\"lazy\" alt=\"Inspector measuring a gloss black exterior part on a checking fixture\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/exterior-parts-quality-inspection.webp\" width=\"1200\" title=\"\"><figcaption>Inspector measuring a gloss black exterior part on a checking fixture<\/figcaption><\/figure><div><ul class=\"tiles g3\"><li>First article inspection (FAI) on the first approved samples<\/li><li>CMM measurement of critical features<\/li><li>Checking fixtures for fit during production<\/li><li>Part weight checks against the \u00b11 g limit<\/li><li>Appearance checks for sink, flash, weld lines and gloss<\/li><li>PPAP up to Level 3 when required<\/li><\/ul><div class=\"prose\"><p>Our quality system is certified to ISO 9001 and IATF 16949. See our <a href=\"\/certifications-compliance\/\">certifications<\/a>.<\/p><\/div><div class=\"certblk\"><div class=\"certs\"><a class=\"cert\" href=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/yirox-iso-9001-quality-management-system-certificate.webp\" rel=\"noopener\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" alt=\"Yirox ISO 9001 quality management system certificate\" height=\"512\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/yirox-iso-9001-quality-management-system-certificate.webp\" width=\"362\" title=\"\"><span>ISO 9001<em>View certificate \u2197<\/em><\/span><\/a><a class=\"cert\" href=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/yirox-iatf-16949-certificate-2026.webp\" rel=\"noopener\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" alt=\"Yirox IATF 16949 certificate\" height=\"512\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/yirox-iatf-16949-certificate-2026.webp\" width=\"362\" title=\"\"><span>IATF 16949<em>View certificate \u2197<\/em><\/span><\/a><\/div><div class=\"qts\"><div class=\"qt\"><span class=\"qi\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M9 11l3 3 8-8\"><\/path><path d=\"M20 12v7a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h9\"><\/path><\/svg><\/span><strong>FAI<\/strong><span>First article inspection<\/span><\/div><div class=\"qt\"><span class=\"qi\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M4 20h16\"><\/path><path d=\"M7 20V8h10v12\"><\/path><path d=\"M12 8V3\"><\/path><circle cx=\"12\" cy=\"13\" r=\"2\"><\/circle><\/svg><\/span><strong>CMM<\/strong><span>Coordinate measuring machine records<\/span><\/div><div class=\"qt\"><span class=\"qi\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"><\/path><path d=\"M14 2v6h6M8 13h8M8 17h5\"><\/path><\/svg><\/span><strong>PPAP<\/strong><span>Up to Level 3<\/span><\/div><div class=\"qt\"><span class=\"qi\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><rect height=\"10\" rx=\"2\" width=\"16\" x=\"4\" y=\"11\"><\/rect><path d=\"M8 11V7a4 4 0 0 1 8 0v4\"><\/path><\/svg><\/span><strong>NDA<\/strong><span>Signed before drawing review<\/span><\/div><\/div><\/div><\/div><\/div><\/div><\/section>\n<section class=\"w\" id=\"why-buyers-choose-yirox-for-injection-molding\"><div class=\"c\"><span class=\"eb\">25 \u2014 Capability<\/span><h2>Why Buyers Choose Yirox for Injection&nbsp;Molding<\/h2><div class=\"fg g3\"><div class=\"fc\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><rect height=\"13\" rx=\"2\" width=\"18\" x=\"3\" y=\"7\"><\/rect><path d=\"M8 7V4h8v3M3 12h18\"><\/path><\/svg><\/span><h4>Range of tonnage<\/h4><p>90 to 2,500 t covers small clips to bumper trim in one factory.<\/p><\/div><div class=\"fc\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"3\"><\/circle><path d=\"M12 2v3M12 19v3M2 12h3M19 12h3M5 5l2 2M17 17l2 2M5 19l2-2M17 7l2-2\"><\/path><\/svg><\/span><h4>Finishing under one roof<\/h4><p>Painting and chrome plating are in-house.<\/p><\/div><div class=\"fc\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M14 3h7v7M21 3l-9 9M10 5H4v15h15v-6\"><\/path><\/svg><\/span><h4>In-house tooling<\/h4><p>Mold changes are handled by our own mold shop.<\/p><\/div><div class=\"fc\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M3 12h4l3 7 4-14 3 7h4\"><\/path><\/svg><\/span><h4>Documented quality<\/h4><p>IATF 16949, FAI, CMM and PPAP up to Level 3.<\/p><\/div><div class=\"fc\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M4 4h16v12H8l-4 4z\"><\/path><\/svg><\/span><h4>Factory-direct from Wuxi<\/h4><p>About 20,000 m\u00b2 factory and partner factories for other processes.<\/p><\/div><div class=\"fc\"><span class=\"ic\"><svg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"1.8\" viewbox=\"0 0 24 24\"><path d=\"M12 2l9 5v10l-9 5-9-5V7z\"><\/path><path d=\"M12 12l9-5M12 12v10M12 12L3 7\"><\/path><\/svg><\/span><h4>Export experience<\/h4><p>Packing and documents for overseas buyers.<\/p><\/div><\/div><\/div><\/section>\n<section class=\"g\" id=\"related-capabilities-and-services\"><div class=\"c\"><span class=\"eb\">26 \u2014 Related<\/span><h2>Related Capabilities and&nbsp;Services<\/h2><div class=\"cards yx-img\"><a class=\"card\" href=\"\/services\/tooling-sampling\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/molded-trim-trial-sample-on-granite-inspection-plate.webp\" alt=\"Black injection-molded trim trial sample on a granite inspection plate\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>Mold Tooling &amp; Sampling<\/h3><p>DFM, mold build, trials and sample approval.<\/p><span class=\"more\">Explore automotive mold tooling \u2192<\/span><\/a><a class=\"card\" href=\"\/capabilities\/painting-surface-finishing\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/robotic-spray-painting-bumper-covers-paint-booth.webp\" alt=\"Robotic spray painting of bumper covers in a paint booth\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>Painting &amp; Surface Finishing<\/h3><p>3C2B paint lines, gloss black and color matching.<\/p><span class=\"more\">Explore automotive plastic painting \u2192<\/span><\/a><a class=\"card\" href=\"\/capabilities\/chrome-plating\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/automatic-gantry-rack-plating-line-chrome-on-abs-opt.webp\" alt=\"Automatic gantry rack plating line for chrome on ABS\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>Chrome Plating<\/h3><p>Decorative chrome on plating-grade ABS.<\/p><span class=\"more\">Explore chrome plating on plastic \u2192<\/span><\/a><a class=\"card\" href=\"\/capabilities\/quality-inspection-cmm\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/yirox-cmm-inspection-room-coordinate-measuring-machine.webp\" alt=\"Coordinate measuring machine in the Yirox inspection room\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>Quality Inspection &amp; CMM<\/h3><p>FAI, CMM and PPAP for molded parts.<\/p><span class=\"more\">Explore CMM inspection and PPAP \u2192<\/span><\/a><a class=\"card\" href=\"\/capabilities\/3d-scanning-reverse-engineering\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/yirox-handheld-3d-scanning-part-measurement.webp\" alt=\"Handheld 3D scanning of a part for measurement\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>3D Scanning<\/h3><p>Scan a part or vehicle to build CAD.<\/p><span class=\"more\">Explore 3D scanning and reverse engineering \u2192<\/span><\/a><a class=\"card\" href=\"\/capabilities\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/injection-molding-hall-overhead-view-yirox-wuxi.webp\" alt=\"Overhead view of the Yirox injection molding hall in Wuxi\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>All Capabilities<\/h3><p>Every process in our Wuxi factory.<\/p><span class=\"more\">Explore our manufacturing capabilities \u2192<\/span><\/a><\/div><!--yx-xlinks--><h3>Automotive Injection Molding Programs by Buyer Type<\/h3><p class=\"lede\">Molded parts that arrive mixed up, relabeled or off-color cost you margin after the invoice. Our automotive injection molding runs on 42 machines in our own IATF 16949 factory, and we pack to your channel so parts arrive ready to sell.<\/p><div class=\"cards yx-img\"><a class=\"card\" href=\"\/solutions\/aftermarket-brands\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/yirox-bumper-trim-production-engineer-drawing-check.webp\" alt=\"Engineer checking a drawing beside molded bumper and trim parts on the production line\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>Aftermarket Brands<\/h3><p>Worried a reorder won\u2019t match? Your molds and colors are held to approved samples.<\/p><span class=\"more\">See the aftermarket brand program \u2192<\/span><\/a><a class=\"card\" href=\"\/solutions\/distributors-importers\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/yirox-carton-barcode-label-scanning.webp\" alt=\"Scanning the barcode label on an auto parts carton before shipment\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>Distributors &amp; Importers<\/h3><p>Too many suppliers to manage? Combine SKUs in one container from one factory.<\/p><span class=\"more\">See the auto parts importer program \u2192<\/span><\/a><a class=\"card\" href=\"\/solutions\/ecommerce-sellers\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/parcel-safe-epe-packed-mirror-cover-carton.webp\" alt=\"Gloss black mirror cover packed in a custom-cut EPE foam insert\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>E-commerce Sellers<\/h3><p>Parcels arriving damaged? We pack parcel-safe and print and apply your FBA labels.<\/p><span class=\"more\">See car accessories manufacturing for e-commerce \u2192<\/span><\/a><\/div><\/div><\/section>\n<section class=\"g\" id=\"what-buyers-say\"><div class=\"c\"><h2>What Buyers Say About Our Injection&nbsp;Molding<\/h2><p class=\"yx-intro\">Buyers on the issues we flagged before tooling and how production held up.<\/p><div class=\"yxt\"><figure class=\"tq\"><blockquote>\u201cWe started with one spoiler mould to test them. They flagged a weld line position in our drawing before quoting, which our previous supplier had missed. Three containers later, they are still quoting the same lead time they actually hold. Not the cheapest quote we received \u2014 the only one we stopped re-checking.\u201d<\/blockquote><figcaption><strong>Purchasing Manager<\/strong><span>From first order to repeat orders<\/span><\/figcaption><\/figure><figure class=\"tq\"><blockquote>\u201cWe had been through a frustrating mold project with another supplier, so we were cautious this time. Having the sample inspection records and dimensions available made a real difference. We could review the actual parts instead of relying on promises.\u201d<\/blockquote><figcaption><strong>Technical Purchasing Manager<\/strong><em>Tooling and Sample Approval<\/em><\/figcaption><\/figure><\/div><p class=\"yxt-note\">Names and companies withheld at the customer\u2019s request.<\/p><\/div><\/section><section class=\"w faqw\" id=\"faq\"><div class=\"c\"><span class=\"eb\">27 \u2014 FAQ<\/span><h2>FAQ<\/h2><details><summary>How much does it cost to have something injection molded?<\/summary><div class=\"a\"><p>Cost has two parts: the mold and the price per part. The mold cost depends on part size, complexity, number of cavities and steel. The part price depends on material, cycle time, finish and quantity. Send us your CAD or a sample and we will quote both.<\/p><\/div><\/details><details><summary>What is the difference between custom injection molding and standard parts?<\/summary><div class=\"a\"><p>Custom injection molding makes a part to your own design, using a mold built for that part. Standard parts come from existing molds. Most of our work is custom molding of exterior parts.<\/p><\/div><\/details><details><summary>What tonnage do I need for my part?<\/summary><div class=\"a\"><p>Tonnage depends mainly on the projected area of the part and the material. Small clips run on 90\u2013250 t machines, while bumper trim and large rear spoilers need 1,300\u20132,500 t two-platen machines. We choose the machine during DFM.<\/p><\/div><\/details><details><summary>Can you do two-shot injection molding?<\/summary><div class=\"a\"><p>Yes. We have three two-shot machines (280 t, 380 t and 530 t) and mold combinations such as PC+PMMA, ABS+TPE and PC\/ABS+TPU.<\/p><\/div><\/details><details><summary>What tolerances can you hold on molded parts?<\/summary><div class=\"a\"><p>Our standard is \u00b11.0 mm, with \u00b10.5 mm on critical features and \u00b10.1 mm on seams. Part weight is held to \u00b11 g.<\/p><\/div><\/details><details><summary>Who owns the mold?<\/summary><div class=\"a\"><p>Mold ownership is agreed in the quote and contract for each project. See our tooling and sampling page for details.<\/p><\/div><\/details><details><summary>What is your minimum order quantity?<\/summary><div class=\"a\"><p>We offer low MOQ on selected items. The quantity for your part is confirmed in your quote.<\/p><\/div><\/details><details><summary>What is DFM in injection molding?<\/summary><div class=\"a\"><p>DFM means design for manufacturing. It is a review of your part design before the mold is built, checking wall thickness, draft, ribs, gates, parting lines and texture so the part molds cleanly and fits. Every Yirox mold starts with a DFM report.<\/p><\/div><\/details><details><summary>Can you injection mold PC and PC\/ABS parts?<\/summary><div class=\"a\"><p>Yes. We mold PC and PC\/ABS as well as ABS, PP, modified PP, TPO and ASA. PC\/ABS is not suitable for chrome plating; plated parts use plating-grade ABS.<\/p><\/div><\/details><details><summary>Do you sign an NDA?<\/summary><div class=\"a\"><p>Yes. We can sign an NDA before you share drawings or samples.<\/p><\/div><\/details><\/div><\/section>\n<section class=\"ctab\" id=\"get-an-injection-molding-quote\"><div class=\"c\"><h2>Get an Injection Molding&nbsp;Quote<\/h2><p class=\"ctat\">Send your CAD files, drawings or a sample part. We will reply with a DFM review and a quote for the mold and parts.<\/p><div class=\"btns\"><a class=\"btn btn-r\" href=\"\/contact\/\">Request a Quote \u2192<\/a><a class=\"btn btn-o\" href=\"\/services\/tooling-sampling\/\">See Tooling &amp; Sampling<\/a><\/div><\/div><\/section>\n<\/div>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@graph\": [{\"@type\": \"Service\", \"name\": \"Automotive plastic injection molding\", \"serviceType\": \"Automotive plastic injection molding\", \"description\": \"Custom plastic injection molding for exterior auto parts: 42 machines 90\u20132,500 t, two-shot molding, in-house molds, painting and chrome. IATF 16949.\", \"url\": \"https:\/\/yiroxautoparts.com\/capabilities\/injection-molding\/\", \"areaServed\": \"Worldwide\", \"provider\": {\"@type\": \"Organization\", \"name\": \"Yirox\", \"url\": \"https:\/\/yiroxautoparts.com\/\", \"foundingDate\": \"2010\", \"address\": {\"@type\": \"PostalAddress\", \"addressLocality\": \"Wuxi\", \"addressCountry\": \"CN\"}}}, {\"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"How much does it cost to have something injection molded?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Cost has two parts: the mold and the price per part. The mold cost depends on part size, complexity, number of cavities and steel. The part price depends on material, cycle time, finish and quantity. 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We can sign an NDA before you share drawings or samples.\"}}]}]}<\/script>\n<dialog class=\"yxq\" id=\"yxq\" aria-labelledby=\"yxq-t\"><div class=\"yxq-h\"><h2 id=\"yxq-t\">Request a Quote<\/h2><p>Tell us the part, vehicle and quantity. An engineer replies by email.<\/p><button type=\"button\" class=\"yxq-x\" aria-label=\"Close quote form\" data-yxq-close>&times;<\/button><\/div><div class=\"yxq-b\"><div class='fluentform ff-default fluentform_wrapper_1 ffs_default_wrap'><form data-form_id=\"1\" id=\"fluentform_1\" class=\"frm-fluent-form fluent_form_1 ff-el-form-top ff_form_instance_1_1 ff-form-loading ffs_default\" data-form_instance=\"ff_form_instance_1_1\" method=\"POST\" ><fieldset  style=\"border: none!important;margin: 0!important;padding: 0!important;background-color: transparent!important;box-shadow: none!important;outline: none!important; min-inline-size: 100%;\">\n                    <legend class=\"ff_screen_reader_title\" style=\"display: block; margin: 0!important;padding: 0!important;height: 0!important;text-indent: -999999px;width: 0!important;overflow:hidden;\">Tell Us About Your Sourcing Project<\/legend><input type='hidden' name='__fluent_form_embded_post_id' value='11410' \/><input type=\"hidden\" id=\"_fluentform_1_fluentformnonce\" name=\"_fluentform_1_fluentformnonce\" value=\"9605c9e501\" \/><input type=\"hidden\" name=\"_wp_http_referer\" value=\"\/pt\/wp-json\/wp\/v2\/pages\/11410\" \/><div data-name=\"ff_cn_id_1\"  class='ff-t-container ff-column-container ff_columns_total_2 '><div class='ff-t-cell ff-t-column-1' style='flex-basis: 50%;'><div data-type=\"name-element\" data-name=\"names\" class=\" ff-field_container ff-name-field-wrapper\" ><div class='ff-t-container'><div class='ff-t-cell '><div class='ff-el-group'><div class=\"ff-el-input--label ff-el-is-required asterisk-right\"><label for='ff_1_names_first_name_' id='label_ff_1_names_first_name_'>Name<\/label><\/div><div class='ff-el-input--content'><input type=\"text\" name=\"names[first_name]\" id=\"ff_1_names_first_name_\" class=\"ff-el-form-control\" placeholder=\"Your Name\" autocomplete=\"given-name\" aria-invalid=\"false\" aria-required=true><\/div><\/div><\/div><\/div><\/div><\/div><div class='ff-t-cell ff-t-column-2' style='flex-basis: 50%;'><div class='ff-el-group'><div class=\"ff-el-input--label ff-el-is-required asterisk-right\"><label for='ff_1_email' id='label_ff_1_email'>Email<\/label><\/div><div class='ff-el-input--content'><input type=\"email\" name=\"email\" id=\"ff_1_email\" class=\"ff-el-form-control\" placeholder=\"Email Address\" autocomplete=\"email\" data-name=\"email\"  aria-invalid=\"false\" aria-required=true><\/div><\/div><\/div><\/div><div class='ff-el-group'><div class=\"ff-el-input--label ff-el-is-required asterisk-right\"><label for='ff_1_product_category' id='label_ff_1_product_category'>Product Category<\/label><\/div><div class='ff-el-input--content'><select name=\"product_category[]\" id=\"ff_1_product_category\" class=\"ff-el-form-control  ff_has_multi_select\" multiple=\"1\" data-name=\"product_category\" data-calc_value=\"0\"  aria-invalid=\"false\" aria-required=\"true\" aria-labelledby=\"label_ff_1_product_category\"><option value=\"Exterior Styling Parts\"  >Exterior Styling Parts<\/option><option value=\"Replacement Body Parts\"  >Replacement Body Parts<\/option><option value=\"Pickup Accessories\"  >Pickup Accessories<\/option><option value=\"EV Aftermarket Parts\"  >EV Aftermarket Parts<\/option><option value=\"Wheel &amp; TireAccessories\"  >Wheel & TireAccessories<\/option><option value=\"Other \/ Not Sure\"  >Other \/ Not Sure<\/option><\/select><\/div><\/div><div class='ff-el-group'><div class=\"ff-el-input--label asterisk-right\"><label for='ff_1_product_requirements' id='label_ff_1_product_requirements'>Product Details \/ Requirements<\/label><\/div><div class='ff-el-input--content'><textarea aria-required=\"false\" aria-labelledby=\"label_ff_1_product_requirements\" name=\"product_requirements\" id=\"ff_1_product_requirements\" class=\"ff-el-form-control\" placeholder=\"Tell us the part type, vehicle model, material, finish, quantity, packaging, or reference sample you need.\" rows=\"3\" cols=\"2\" data-name=\"product_requirements\" ><\/textarea><\/div><\/div><div class='ff-el-group'><div class=\"ff-el-input--label ff-el-is-required asterisk-right\"><label for='ff_1_message' id='label_ff_1_message'>Your Message<\/label><\/div><div class='ff-el-input--content'><textarea aria-required=\"true\" aria-labelledby=\"label_ff_1_message\" name=\"message\" id=\"ff_1_message\" class=\"ff-el-form-control\" placeholder=\"Your Message\" rows=\"4\" cols=\"2\" data-name=\"message\" ><\/textarea><\/div><\/div><input type=\"hidden\" name=\"lead_location\" data-name=\"lead_location\" ><input type=\"hidden\" name=\"landing_page\" data-name=\"landing_page\" ><input type=\"hidden\" name=\"submitted_page\" data-name=\"submitted_page\" ><div class='ff-el-group yirox-tracking-field'><div class=\"ff-el-input--label asterisk-right\"><label for='ff_1_visited_pages' id='label_ff_1_visited_pages'>\u8bbf\u95ee\u8def\u5f84<\/label><\/div><div class='ff-el-input--content'><textarea aria-required=\"false\" aria-labelledby=\"label_ff_1_visited_pages\" name=\"visited_pages\" id=\"ff_1_visited_pages\" class=\"ff-el-form-control\" rows=\"3\" cols=\"2\" data-name=\"visited_pages\" ><\/textarea><\/div><\/div><div class='ff-el-group yirox-tracking-field'><div class=\"ff-el-input--label asterisk-right\"><label for='ff_1_lead_source' id='label_ff_1_lead_source'>\u6765\u6e90\u8bbe\u5907<\/label><\/div><div class='ff-el-input--content'><textarea aria-required=\"false\" aria-labelledby=\"label_ff_1_lead_source\" name=\"lead_source\" id=\"ff_1_lead_source\" class=\"ff-el-form-control\" rows=\"3\" cols=\"2\" data-name=\"lead_source\" ><\/textarea><\/div><\/div><div class='ff-form-inline-style' hidden><style>form.fluent_form_1 .ff-btn-submit:not(.ff_btn_no_style) { background-color: var(--fluentform-primary); 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Yirox runs 42 injection molding machines from 90 to 2,500 tons, three two-shot cells and an in-house mold shop at its IATF 16949 certified [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":11409,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-11410","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/yiroxautoparts.com\/pt\/wp-json\/wp\/v2\/pages\/11410","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yiroxautoparts.com\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/yiroxautoparts.com\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/yiroxautoparts.com\/pt\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/yiroxautoparts.com\/pt\/wp-json\/wp\/v2\/comments?post=11410"}],"version-history":[{"count":15,"href":"https:\/\/yiroxautoparts.com\/pt\/wp-json\/wp\/v2\/pages\/11410\/revisions"}],"predecessor-version":[{"id":12165,"href":"https:\/\/yiroxautoparts.com\/pt\/wp-json\/wp\/v2\/pages\/11410\/revisions\/12165"}],"up":[{"embeddable":true,"href":"https:\/\/yiroxautoparts.com\/pt\/wp-json\/wp\/v2\/pages\/11409"}],"wp:attachment":[{"href":"https:\/\/yiroxautoparts.com\/pt\/wp-json\/wp\/v2\/media?parent=11410"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}