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h2{color:#fff;margin:0 0 4px;font-size:26px}.yxq .yxq-h p{margin:0;color:rgba(255,255,255,.85);font-size:15px}\n.yxq .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=\"Coordinate measuring machine (CMM) in the Yirox inspection room\" 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\/yirox-cmm-inspection-room-coordinate-measuring-machine.webp')\"><div class=\"c hc\"><nav aria-label=\"Breadcrumb\" class=\"crumb\"><a href=\"\/\">Home<\/a> <span>\/<\/span> <a href=\"\/services\/\">Services<\/a> <span>\/<\/span> Injection Mold Tooling &amp; Sampling<\/nav><span class=\"eyebrow\">Yirox Manufacturing Services<\/span><h1>Injection Mold Tooling and Prototype Sampling for Automotive Exterior&nbsp;Parts<\/h1><p class=\"lead\">A good exterior part starts with a good mold. Yirox designs and builds injection mold tooling for bumpers, lips, spoilers, trim and wheel center caps, then proves each tool with trial samples until fit, finish and dimensions are approved. You get a DFM report before steel is cut, FAI and CMM data before production, and an NDA before you share a single drawing.<\/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>2010<\/strong><span>Founded<\/span><\/div><div><strong>~180<\/strong><span>Staff<\/span><\/div><div><strong>~20,000 m\u00b2<\/strong><span>Wuxi factory<\/span><\/div><div><strong>40+<\/strong><span>Export countries<\/span><\/div><div><strong>IATF 16949<\/strong><span>+ ISO 9001<\/span><\/div><\/div><\/div><\/div>\n<section class=\"w\" id=\"parts-we-tool-and-sample-capabilities-at-a-glance\"><div class=\"c\"><span class=\"eb\">01 \u2014 Capabilities<\/span><h2>Parts We Tool and Sample: Capabilities at a&nbsp;Glance<\/h2><div class=\"split\"><div class=\"tx\"><p class=\"lede\">Our molding work focuses on automotive exterior parts and wheel center caps. Typical tooling projects include front lips, rear diffusers, side skirts, spoilers, bumpers, grille surrounds, mirror and window trim, black trim parts, mud flaps and center caps for steel and alloy wheels.<\/p><p class=\"lede\">Each has its own tooling priorities: long parts need control of warpage, gloss parts need careful gate placement, and clip-on parts need retention that survives repeat installation.<\/p><\/div><figure class=\"fig\"><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><div class=\"tw\"><table><thead><tr><th>Item<\/th><th>What we offer<\/th><\/tr><\/thead><tbody><tr><td>Process<\/td><td>Injection mold tooling, mold trials, tool modification and sample approval for automotive exterior parts and wheel center caps<\/td><\/tr><tr><td>Materials<\/td><td>ABS, PP, modified PP, TPO and ASA<\/td><\/tr><tr><td>Surfaces<\/td><td>Molded-in texture and black trim finishes; gloss black, carbon pattern and primer finishes for painted parts<\/td><\/tr><tr><td>Engineering input<\/td><td>DFM report with comments on wall thickness, draft, gates and parting lines<\/td><\/tr><tr><td>Inspection<\/td><td>First article inspection (FAI) and CMM measurement<\/td><\/tr><tr><td>Documents<\/td><td>PPAP up to Level 3, weathering test reports, recycled-content statements<\/td><\/tr><tr><td>Confidentiality<\/td><td>NDA available before drawing review<\/td><\/tr><tr><td>Lead time<\/td><td>Depends on product and scale; confirmed in your quote<\/td><\/tr><\/tbody><\/table><\/div><div class=\"tx2\"><div class=\"t\"><div class=\"prose\"><p>Our approximately 20,000 m\u00b2 factory in Wuxi runs the full route from tool review to volume molding, so the team that builds your mold is the same team that will run your production parts. That matters for exterior parts, where small changes in a gate or a cooling line show up as visible marks or a gap on the vehicle.<\/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>PPAP<\/dt><dd>Up to Level 3<\/dd><\/div><div><dt>2<\/dt><dd>Paint lines, 3C2B system<\/dd><\/div><\/dl><a href=\"\/contact\/\">Request a quote \u2192<\/a><\/aside><\/div><div class=\"callout\"><span class=\"cl\">Key fact<\/span><p>Tooling and sampling lead time depends on product and scale, and is confirmed in your quote.<\/p><\/div><div class=\"yx-kf\"><h3>Key facts about tooling and sampling<\/h3><ul><li>You receive a DFM report before tooling starts.<\/li><li>Mold making, 3D scanning and CNC machining in the same factory.<\/li><li>42 injection molding machines from 90 to 2,500 t, including 3 two-shot machines.<\/li><li>Two CMMs in-house, with PPAP up to Level 3.<\/li><li>Mold trials and steel corrections before sample approval.<\/li><li>Made in our IATF 16949 and ISO 9001 certified factory of about 20,000 m\u00b2 in Wuxi, China.<\/li><\/ul><\/div><\/div><\/section>\n<section class=\"g\" id=\"who-this-service-is-for\"><div class=\"c\"><span class=\"eb\">02 \u2014 Capabilities<\/span><h2>Who This Service Is&nbsp;For<\/h2><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 4h16v12H8l-4 4z\"><\/path><\/svg><\/span><h3>Aftermarket Brands Launching a New Part<\/h3><p>You have a design or a competitor sample and need a tool that makes it repeatably. We review the design, suggest changes that make it easier to mold, and build the tool to your approved drawing. <a href=\"\/solutions\/aftermarket-brands\/\">Solutions for aftermarket brands \u2192<\/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\"><rect height=\"13\" rx=\"2\" width=\"18\" x=\"3\" y=\"7\"><\/rect><path d=\"M8 7V4h8v3M3 12h18\"><\/path><\/svg><\/span><h3>Distributors Replacing a Worn or Lost Tool<\/h3><p>If an existing supplier has stopped production or a tool is worn, we can work from an original part. With 3D scanning and measurement we capture the geometry, then rebuild the tool so the new parts match the parts your customers already know. <a href=\"\/solutions\/distributors-importers\/\">Solutions for distributors and importers \u2192<\/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=\"M14 3h7v7M21 3l-9 9M10 5H4v15h15v-6\"><\/path><\/svg><\/span><h3>Buyers Updating an Existing Product<\/h3><p>A new model year, a revised clip, a different texture or your logo on the part. These changes often need tool modification rather than a new mold, and we will tell you which route fits.<\/p><\/div><\/div><\/div><\/div><\/section>\n<section class=\"w\" id=\"our-process-from-dfm-report-to-approved-sample\"><div class=\"c\"><span class=\"eb\">03 \u2014 How It Works<\/span><h2>Our Process: From DFM Report to Approved&nbsp;Sample<\/h2><ol class=\"steps s5\"><li><span class=\"n\">01<\/span><h3>Drawing, 3D File or Sample Review<\/h3><p>Send a 3D file, a 2D drawing, a physical sample or an original part. We can sign an NDA before you send it. We confirm the vehicle, material, finish and expected quantity.<\/p><\/li><li><span class=\"n\">02<\/span><h3>DFM Report and Quote<\/h3><p>We send a DFM report that covers wall thickness, draft angles, ribs and bosses, gate and parting-line positions, undercuts and the cosmetic faces. The quote explains the tooling route and what drives its cost.<\/p><\/li><li><span class=\"n\">03<\/span><h3>Tool Build and First Trial<\/h3><p>After you approve the DFM and quote, we build the tool and run the first trial. You receive trial photos and inspection notes.<\/p><\/li><li><span class=\"n\">04<\/span><h3>Correction and Re-trial<\/h3><p>We correct dimensions, surface and fill issues found in the trial and run again until the part meets the agreed standard.<\/p><\/li><li><span class=\"n\">05<\/span><h3>Sample Approval and Sign-off<\/h3><p>You receive approved samples for fit and appearance checks. Once you sign off, that sample becomes the reference for production.<\/p><\/li><\/ol><div class=\"yx-cta\"><p><strong>Have a part ready for tooling?<\/strong>Send the 3D file or sample and we will reply with a DFM review, tooling plan and sample timeline.<\/p><button type=\"button\" class=\"btn btn-r\" data-yxq data-yxq-h=\"Get a Tooling &amp; Sample Quote\" data-yxq-s=\"Attach your 3D file, drawing or sample photos and tell us the target annual quantity.\" aria-haspopup=\"dialog\">Get a Tooling &#038; Sample Quote \u2192<\/button><\/div><\/div><\/section>\n<section class=\"g\" id=\"mold-development-parting-gates-shrinkage-and-trial\"><div class=\"c\"><span class=\"eb\">04 \u2014 Engineering<\/span><h2>Mold Development: Parting, Gates, Shrinkage and&nbsp;Trial<\/h2><p class=\"lede\">Most problems on a molded exterior part are decided while the mold is still on screen. Before tooling starts, our engineers review four areas with you.<\/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 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\"><path d=\"M4 4h16v12H8l-4 4z\"><\/path><\/svg><\/span><h3>Parting Line and Cosmetic Faces<\/h3><p>The parting line is where the two halves of the mold meet, and it leaves a fine line on the part. On a front lip or a grille surround, we place it on an edge or a hidden face so it does not cross the area a driver sees. We mark the cosmetic faces on the DFM drawing so you can confirm them before the tool is built.<\/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>Gate Position and Flow<\/h3><p>The gate is where molten plastic enters the cavity. Its position affects fill, weld lines and gloss. On long parts like side skirts and spoilers, the gate location also controls how the part shrinks along its length. We show the proposed gate positions and explain why they are there, so you know where gate marks will be before you see a sample.<\/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>Shrinkage Compensation<\/h3><p>Every resin shrinks as it cools, and each grade shrinks by a different amount. PP and modified PP shrink more than ABS, and filled grades shrink differently along and across the flow. The mold is cut larger than the finished part to compensate. Changing the resin grade after the tool is cut can move the part out of tolerance, which is why we lock the material before tooling.<\/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\"><rect height=\"13\" rx=\"2\" width=\"18\" x=\"3\" y=\"7\"><\/rect><path d=\"M8 7V4h8v3M3 12h18\"><\/path><\/svg><\/span><h3>Mold Trial and Revisions<\/h3><p>The first trial shot shows how the real tool behaves. We check fill, flash, sink, warpage and dimensions, then correct the tool and run again. Each trial is recorded, so you can see what changed between samples and why.<\/p><\/div><\/div><\/div><div class=\"ad5\"><h3>Our Mold Shop at a Glance<\/h3><p class=\"lede\">Tools for your parts are built and maintained in our own mold shop in Wuxi, beside the molding hall, so trial feedback goes straight to the toolmakers who cut the steel.<\/p><div class=\"tw\"><table><thead><tr><th>Item<\/th><th>In-house capability<\/th><\/tr><\/thead><tbody><tr><td>Mold output<\/td><td>6\u20138 molds per month<\/td><\/tr><tr><td>Mold size<\/td><td>Up to 25 t<\/td><\/tr><tr><td>Mold steel<\/td><td>P20 and H13<\/td><\/tr><tr><td>Mold life<\/td><td>300,000\u2013500,000 shots<\/td><\/tr><tr><td>Machining<\/td><td>3-axis machining centers \u00d74 (800 \u00d7 500 \u00d7 500 mm, \u00b10.01 mm), CNC lathes \u00d72, engraving-milling machines \u00d72<\/td><\/tr><tr><td>EDM and grinding<\/td><td>Wire EDM \u00d72, EDM \u00d72, surface grinders \u00d72<\/td><\/tr><tr><td>Early fit models<\/td><td>SLA 3D printer \u00d71<\/td><\/tr><tr><td>Checking fixtures<\/td><td>Built in our fixture shop; gauge R&amp;R (MSA %GRR) \u226410%<\/td><\/tr><\/tbody><\/table><\/div><p class=\"lk\">Molding machines from 90 to 2,500 t, two-shot molding and mold flow analysis are covered on our <a href=\"\/capabilities\/injection-molding\/\">injection molding capability page<\/a>.<\/p><\/div><\/div><\/section>\n<section class=\"w\" id=\"tooling-choices-prototype-injection-molding-vs-production-tooling\"><div class=\"c\"><span class=\"eb\">05 \u2014 Engineering<\/span><h2>Tooling Choices: Prototype Injection Molding vs Production&nbsp;Tooling<\/h2><p class=\"lede\">Not every project needs a brand-new mold. The right route depends on the part, your timeline and your volume.<\/p><div class=\"side\"><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><div class=\"cg g1\"><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>New Tool vs Tool Modification<\/h3><p>If you already sell a similar part, modifying an existing tool can be faster and cheaper than building a new one. Typical modifications include changing a logo insert, adjusting a clip, moving a mounting hole or updating a texture.<\/p><p>A new tool makes sense when the geometry changes, the part must fit a different vehicle or the old tool is worn. We tell you which route suits your part and what each one 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\"><path d=\"M14 3h7v7M21 3l-9 9M10 5H4v15h15v-6\"><\/path><\/svg><\/span><h3>Tooling Complexity and Part Geometry<\/h3><p>Undercuts, clips, deep ribs and side holes often need slides or lifters in the mold. Each feature adds work to the tool and can add risk to the cycle. During DFM we look for ways to simplify the part without changing how it looks or fits, such as moving a clip direction or adding draft to a wall.<\/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>Prototype Tooling vs Production Tooling<\/h3><p>Prototype tooling (sometimes called soft tooling) is built to make a limited number of parts so you can test fit and appearance. Production tooling (hard tooling) is built to run repeat orders with stable dimensions. If you are testing a new design, we can discuss starting with a simpler tool and moving to production tooling once the design is frozen.<\/p><\/div><\/div><\/div><\/div><\/div><\/div><\/section>\n<section class=\"g\" id=\"materials-for-exterior-parts-abs-pp-modified-pp-tpo-and-asa\"><div class=\"c\"><span class=\"eb\">06 \u2014 Materials &amp; Finishes<\/span><h2>Materials for Exterior Parts: ABS, PP, Modified PP, TPO and&nbsp;ASA<\/h2><div class=\"split\"><div class=\"tx\"><p class=\"lede\">ABS injection molding is the most common choice for painted exterior parts, while polypropylene injection molding suits parts that must flex. We help you choose a grade during DFM and keep it fixed for repeat orders. For spoilers, see our comparison of <a href=\"\/carbon-fiber-vs-abs-vs-fiberglass-spoilers\/\">carbon fiber vs ABS vs fiberglass spoilers<\/a>. Real carbon fiber and fiberglass parts are made through our partner factories.<\/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=\"tw\"><table><thead><tr><th>Material<\/th><th>Typical exterior uses<\/th><th>What to know<\/th><\/tr><\/thead><tbody><tr><td>ABS<\/td><td>Spoilers, lips, grille surrounds, trim, center caps<\/td><td>Stiff, easy to paint, good gloss; dry before molding to avoid silver streaks<\/td><\/tr><tr><td>PP<\/td><td>Mud flaps, liners, flexible trim<\/td><td>Tough and flexible; needs pretreatment if painted<\/td><\/tr><tr><td>Modified PP<\/td><td>Bumpers, larger exterior panels<\/td><td>Filled grades add stiffness; shrinkage depends on grade<\/td><\/tr><tr><td>TPO<\/td><td>Bumper covers, flexible exterior parts<\/td><td>Good impact performance, including in cold weather<\/td><\/tr><tr><td>ASA<\/td><td>Unpainted exterior trim<\/td><td>Good weather and UV resistance for parts left in color<\/td><\/tr><\/tbody><\/table><\/div><\/div><\/section>\n<section class=\"w\" id=\"surface-finishes-and-mold-texture-for-exterior-parts\"><div class=\"c\"><span class=\"eb\">07 \u2014 Materials &amp; Finishes<\/span><h2>Surface Finishes and Mold Texture for Exterior&nbsp;Parts<\/h2><div class=\"split rev\"><div class=\"tx\"><p class=\"lede\">Mold texture is etched or machined into the tool so the part comes out with a grain instead of a plain surface. Textured black trim hides small marks and does not need paint, which suits chrome-delete and black trim programs.<\/p><p class=\"lede\">For painted parts we offer gloss black, carbon pattern and primer finishes. Texture depth and draft are linked: deeper texture needs more draft so the part releases cleanly, so we confirm both together. Read more in our <a href=\"\/chrome-delete-guide\/\">chrome delete guide<\/a>.<\/p><\/div><figure class=\"fig\"><img loading=\"lazy\" alt=\"Three mirror covers in matte, satin and gloss black\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/mirror-covers-matte-satin-gloss-black.webp\" width=\"1200\" title=\"\"><figcaption>ABS exterior trim in gloss black, matte black and carbon pattern finishes<\/figcaption><\/figure><\/div><div class=\"rws\"><div class=\"rw\"><h3>Molded-in Textured Black<\/h3><div class=\"rt\"><p>Black trim and chrome-delete parts are usually molded with a grain in black material. The texture comes from the tool, so no paint is needed and the finish stays consistent across repeat orders.<\/p><\/div><\/div><div class=\"rw\"><h3>Gloss Black<\/h3><div class=\"rt\"><p>Gloss black is a painted finish for spoilers, lips and other styling parts that should look ready to install out of the box.<\/p><\/div><\/div><div class=\"rw\"><h3>Carbon Pattern<\/h3><div class=\"rt\"><p>Carbon pattern gives an injection-molded part a carbon-fiber look. It is a finish on the molded part, not real carbon fiber; real carbon fiber spoilers are supplied through our partner factories.<\/p><\/div><\/div><div class=\"rw\"><h3>Primer<\/h3><div class=\"rt\"><p>Primer parts are supplied ready for paint, so body shops can color-match them to the car.<\/p><\/div><\/div><div class=\"rw\"><h3>Surface Preparation and Painting Steps<\/h3><div class=\"rt\"><p>Painted finishes go through surface preparation, priming and painting before inspection. Each finish is approved against a sample before production.<\/p><\/div><\/div><div class=\"rw\"><h3>Materials and Weathering<\/h3><div class=\"rt\"><p>ASA and TPO are used for exterior parts that face sun and weather. Weathering test reports are available, so you can check how a material and finish hold up for your market.<\/p><\/div><\/div><\/div><\/div><\/section>\n<section class=\"g\" id=\"sample-approval-what-we-check-before-sign-off\"><div class=\"c\"><span class=\"eb\">08 \u2014 Quality &amp; Documents<\/span><h2>Sample Approval: What We Check Before&nbsp;Sign-off<\/h2><figure class=\"fig wide\"><img loading=\"lazy\" alt=\"Black front lip test-fitted on a sedan bumper for sample approval\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/front-lip-test-fit-on-vehicle-for-sample-approval.webp\" width=\"1200\" title=\"\"><figcaption>Black front lip test-fitted on a sedan bumper for sample approval<\/figcaption><\/figure><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\"><path d=\"M4 4h16v12H8l-4 4z\"><\/path><\/svg><\/span><h3>Trial Sample vs Approved Sample<\/h3><p>A trial sample shows how the tool is performing. An approved sample is the part you sign off as the standard for production, including color, gloss, texture and fit. We keep the approved sample on file and use it to check later batches.<\/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>Dimensions and Fitment Check<\/h3><p>We check key dimensions against your drawing and, for vehicle-specific parts, against the original part or vehicle. CMM measurement gives a full record of critical points.<\/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>Cosmetic and Functional Approval<\/h3><p>Cosmetic approval covers gate marks, weld lines, sink, flow lines, gloss and color. Functional approval covers clip retention, mounting, assembly with mating parts and any test you require.<\/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>Accessories, Clips and Hardware<\/h3><p>A part is only complete when its clips, screws, tape and brackets are confirmed. We check each accessory against the bill of materials and include it in the approved sample set.<\/p><\/div><\/div><\/div><div class=\"ad5\"><h3>Part Tolerances We Work To<\/h3><p class=\"lede\">Before sign-off we agree which dimensions are critical on your drawing. These are the standard tolerances we hold on exterior plastic 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 dimensions<\/td><td>\u00b10.5 mm<\/td><\/tr><tr><td>Seams and mating gaps<\/td><td>\u00b10.1 mm<\/td><\/tr><tr><td>Part weight<\/td><td>\u00b11 g (unit-to-unit variation \u22640.3%)<\/td><\/tr><\/tbody><\/table><\/div><p class=\"lk\">Critical dimensions are measured by CMM and recorded in the first article inspection. See <a href=\"\/capabilities\/quality-inspection-cmm\/\">quality inspection and CMM<\/a>.<\/p><\/div><div class=\"yx-cta\"><p><strong>Want to know what we check before sign-off?<\/strong>Tell us your fitment and finish requirements and we will confirm the checks for your sample.<\/p><button type=\"button\" class=\"btn btn-r\" data-yxq data-yxq-h=\"Request a Sample Approval Plan\" data-yxq-s=\"List the fitment, appearance and document requirements your sample has to pass.\" aria-haspopup=\"dialog\">Request a Sample Approval Plan \u2192<\/button><\/div><\/div><\/section>\n<section class=\"w\" id=\"quality-checks-first-article-inspection-and-cmm\"><div class=\"c\"><span class=\"eb\">09 \u2014 Quality &amp; Documents<\/span><h2>Quality Checks: First Article Inspection and&nbsp;CMM<\/h2><div class=\"split\"><div class=\"tx\"><p class=\"lede\">First article inspection (FAI) confirms that the first parts from a new or modified tool match the drawing and the approved sample. We measure critical dimensions, check appearance and test assembly. CMM (coordinate measuring machine) measurement records key points in three dimensions, which is useful for long parts and parts with several mounting points.<\/p><p class=\"lede\">Our quality system is certified to ISO 9001 and IATF 16949, and we can prepare PPAP documentation up to Level 3. See <a href=\"\/certifications-compliance\/\">certifications and compliance<\/a>.<\/p><\/div><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><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><\/section>\n<section class=\"g\" id=\"production-readiness-bom-inspection-standard-and-packaging-sample\"><div class=\"c\"><span class=\"eb\">10 \u2014 Quality &amp; Documents<\/span><h2>Production Readiness: BOM, Inspection Standard and Packaging&nbsp;Sample<\/h2><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\"><circle cx=\"12\" cy=\"12\" r=\"9\"><\/circle><path d=\"M8 12l3 3 5-6\"><\/path><\/svg><\/span><h3>Bill of Materials<\/h3><p>The BOM lists every component that ships with the part: the molded part, clips, screws, tape, brackets and instructions. It is agreed before production so nothing is missing from the box.<\/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>Inspection Standard<\/h3><p>We write down what will be checked on each batch, how it is checked and what is acceptable, based on the approved sample and your drawing.<\/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>Packaging Sample<\/h3><p>We pack an approved sample in its final packaging and check it for scratching, bending and missing parts before volume packing starts. If you need branded packaging, see <a href=\"\/services\/private-label-packaging\/\">private label and packaging<\/a>.<\/p><\/div><\/div><\/div><\/div><\/section>\n<section class=\"band\" id=\"common-defects-we-prevent-at-the-tooling-stage\" style=\"background-image:linear-gradient(90deg,rgba(8,17,40,.94) 0%,rgba(10,22,52,.86) 55%,rgba(10,22,52,.6) 100%),url('https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/yirox-bumper-exterior-parts-production-line-wuxi-opt.webp')\"><div class=\"c\"><span class=\"eb\">11 \u2014 Quality &amp; Documents<\/span><h2>Common Defects We Prevent at the Tooling&nbsp;Stage<\/h2><p class=\"lede\">Many molding defects are easier to prevent in the tool than to fix in production. During DFM and trials we look for these in particular:<\/p><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>Warpage on long exterior parts<\/h4><p>Uneven cooling or wall thickness bends spoilers and skirts. Balanced cooling and gate placement keep them straight.<\/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>Sink around clips and ribs<\/h4><p>Thick sections shrink more and leave a dip on the show face. We keep ribs and bosses in proportion to the wall.<\/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>Weld lines on grilles<\/h4><p>Where flow fronts meet, a visible line can form. Gate position and flow balance move it away from cosmetic faces.<\/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>Flash on retention features<\/h4><p>Worn or poorly fitted steel leaves thin plastic on clips. We check shut-off areas at each trial.<\/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>Splay and burn marks<\/h4><p>Moisture in ABS and trapped air cause silver streaks and burns. Drying and venting are confirmed before sampling.<\/p><\/div><\/div><\/div><\/section>\n<section class=\"w\" id=\"tool-ownership-maintenance-and-repeat-production\"><div class=\"c\"><span class=\"eb\">12 \u2014 Commercial Terms<\/span><h2>Tool Ownership, Maintenance and Repeat&nbsp;Production<\/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\"><path d=\"M4 20h16M6 16V9M11 16V5M16 16v-7M20 16v-4\"><\/path><\/svg><\/span><h3>Who Owns the Mold?<\/h3><p>Mold ownership is agreed per project and written into the quotation before tooling starts, so both sides know where the tool stands from day one.<\/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>Tool Maintenance and Repeated Production<\/h3><p>Molds wear over time. Flash on clips, worn texture and changing dimensions are early signs. We clean and maintain tools between runs, check repeat orders against the approved sample, and tell you if a tool needs repair before it affects your parts.<\/p><\/div><\/div><\/div><\/div><\/section>\n<section class=\"g\" id=\"what-drives-tooling-lead-time-and-cost-of-a-plastic-injection-mold\"><div class=\"c\"><span class=\"eb\">13 \u2014 Commercial Terms<\/span><h2>What Drives Tooling Lead Time and Cost of a Plastic Injection&nbsp;Mold<\/h2><div class=\"split\"><div class=\"tx\"><p class=\"lede\">Lead time depends on product and scale, and we confirm it in your quote. The main factors are:<\/p><\/div><figure class=\"fig\"><img loading=\"lazy\" alt=\"Injection molding machines and stacked mold tooling in the Wuxi mold workshop\" decoding=\"async\" height=\"800\" loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/injection-mold-tooling-workshop-wuxi-factory.webp\" width=\"1200\" title=\"\"><figcaption>Injection molding machines and stacked mold tooling in the Wuxi mold workshop<\/figcaption><\/figure><\/div><ul class=\"tiles g3\"><li>Part size and the number of cavities<\/li><li>Undercuts, slides and lifters<\/li><li>Surface texture and cosmetic requirements<\/li><li>Material grade and any finishing or painting<\/li><li>The number of trials needed to reach approval<\/li><li>Packaging and document requirements<\/li><\/ul><\/div><\/section>\n<section class=\"w\" id=\"why-buyers-choose-yirox-for-tooling-injection-mold-manufacturer-in-china\"><div class=\"c\"><span class=\"eb\">14 \u2014 Why Yirox<\/span><h2>Why Buyers Choose Yirox for Tooling: Injection Mold Manufacturer in&nbsp;China<\/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\"><path d=\"M12 2l9 5v10l-9 5-9-5V7z\"><\/path><path d=\"M12 12l9-5M12 12v10M12 12L3 7\"><\/path><\/svg><\/span><h3>One Team from Tool to Production<\/h3><p>The engineers who review your DFM, the toolmakers who build the mold and the molding team that runs your parts work in the same factory in Wuxi. Problems found at trial are fixed by the people who caused them, not passed between companies.<\/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>Focus on Exterior Parts<\/h3><p>We mold exterior parts and wheel center caps every day, so we know where cosmetic faces, gloss, texture and fit matter most. That focus shapes how we place gates, design clips and approve samples.<\/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>Documents Buyers Ask For<\/h3><p>ISO 9001 and IATF 16949 certification, PPAP up to Level 3, weathering test reports and recycled-content statements give your quality team the records they need.<\/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>Clear Terms from the Start<\/h3><p>Mold ownership is agreed per project, lead time is confirmed in your quote, and we can sign an NDA before you share files.<\/p><\/div><\/div><\/div><\/div><\/section>\n<section class=\"g\" id=\"related-services-and-resources\"><div class=\"c\"><span class=\"eb\">15 \u2014 Resources<\/span><h2>Related Services and&nbsp;Resources<\/h2><ul class=\"tiles g2\"><li><a href=\"\/auto-parts-oem-service\/\">OEM \/ ODM manufacturing<\/a> for full product development<\/li><li><a href=\"\/services\/vehicle-specific-development\/\">Vehicle-specific development<\/a> for parts designed to fit a particular model<\/li><li><a href=\"\/automotive-injection-molding\/\">Automotive injection molding guide<\/a><\/li><li>Product lines: <a href=\"\/product-category\/auto-body-kits-and-aero-parts-manufacturer\/\">body kits and aero parts<\/a>, <a href=\"\/product-category\/spoilers-and-wings\/\">spoilers and wings<\/a>, <a href=\"\/product-category\/front-bumpers\/\">front bumpers<\/a>, <a href=\"\/product-category\/wheel-covers-and-hubcaps-manufacturer\/\">wheel covers and hubcaps<\/a><\/li><\/ul><\/div><\/section>\n<section class=\"sec rel\" id=\"related\"><div class=\"c\"><h2>Related Capabilities and Materials&nbsp;Guide<\/h2><span class=\"cl2\">Capabilities<\/span><div class=\"rcg yx-img n4\"><a class=\"rc\" href=\"\/capabilities\/injection-molding\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/injection-molding-machine-yirox-molding-hall-wuxi.webp\" alt=\"Injection molding machine in the Yirox molding hall in Wuxi\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>Injection Molding<\/h3><p>42 machines from 90 to 2,500 t, including two-shot molding.<\/p><span class=\"more\">Explore automotive injection molding \u2192<\/span><\/a><a class=\"rc\" 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, body color and molded-in texture.<\/p><span class=\"more\">Explore automotive plastic painting \u2192<\/span><\/a><a class=\"rc\" 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=\"rc\" 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 measurement and PPAP up to Level 3.<\/p><span class=\"more\">Explore CMM inspection and PPAP \u2192<\/span><\/a><\/div><span class=\"cl2\">Materials guide<\/span><div class=\"rcg yx-img\"><a class=\"rc\" href=\"\/materials\/abs\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/gloss-black-front-grille-with-red-trim.webp\" alt=\"Gloss black front grille with a red trim line\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>ABS<\/h3><p>Rigid, paintable plastic for spoilers and styling parts.<\/p><span class=\"more\">Compare ABS plastic grades and finishes \u2192<\/span><\/a><a class=\"rc\" href=\"\/materials\/pp-tpo\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/raw-black-pp-bumper-on-factory-rack.webp\" alt=\"Raw black molded bumper fascia on a rack in the factory\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>PP and TPO<\/h3><p>Tough, flexible plastic for bumper covers and mud flaps.<\/p><span class=\"more\">See PP plastic and TPO design tips \u2192<\/span><\/a><a class=\"rc\" href=\"\/materials\/textured-grain\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/mold-texture-sample-book.webp\" alt=\"Open mold texture sample book with grain swatches\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>Mold Texture &amp; Grain<\/h3><p>VDI 3400 and SPI mold textures and grain for unpainted exterior parts.<\/p><span class=\"more\">Compare plastic texture grades \u2192<\/span><\/a><a class=\"rc\" href=\"\/materials\/asa\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/grain-textured-pillar-trim-panel.webp\" alt=\"Grain-textured molded plastic pillar trim panel\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>ASA<\/h3><p>Weather-resistant plastic for trim left in its molded color.<\/p><span class=\"more\">Read ASA vs ABS for unpainted trim \u2192<\/span><\/a><a class=\"rc\" href=\"\/carbon-fiber-vs-abs-vs-fiberglass-spoilers\/\"><span class=\"ph\"><img loading=\"lazy\" src=\"https:\/\/yiroxautoparts.com\/wp-content\/uploads\/2026\/10\/hydro-dipped-carbon-pattern-window-switch-panels.webp\" alt=\"Hydro-dipped carbon fiber pattern window switch panels\" width=\"600\" height=\"400\" loading=\"lazy\" decoding=\"async\" title=\"\"><\/span><h3>Carbon Fiber vs ABS vs Fiberglass<\/h3><p>Trade-offs between spoiler materials.<\/p><span class=\"more\">Compare carbon fiber vs ABS vs fiberglass \u2192<\/span><\/a><\/div><\/div><\/section><section class=\"g\" id=\"what-buyers-say\"><div class=\"c\"><h2>What Buyers Say About Tooling and&nbsp;Sampling<\/h2><p class=\"yx-intro\">Buyers on what happened between the first sample and approval.<\/p><div class=\"yxt\"><figure class=\"tq\"><blockquote>\u201cThe first sample needed an adjustment around the mounting tabs. They documented the issue, explained the correction and sent updated measurements with the next sample. That level of detail made it easier for our team to approve the tooling.\u201d<\/blockquote><figcaption><strong>Engineering Manager<\/strong><em>Injection Mold Development<\/em><\/figcaption><\/figure><figure class=\"tq\"><blockquote>\u201cGood communication during sampling is worth a lot. We always knew what was being checked, what still needed approval and which changes would affect the schedule. There were no surprises when it came time to move forward.\u201d<\/blockquote><figcaption><strong>Project Coordinator<\/strong><em>Automotive Parts Development<\/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\">16 \u2014 FAQ<\/span><h2>FAQ<\/h2><details><summary>How long does injection mold tooling take?<\/summary><div class=\"a\"><p>Lead time depends on product and scale. Part size, cavities, undercuts, texture and the number of trials all affect it. We confirm the timeline in your quote.<\/p><\/div><\/details><details><summary>What is the difference between prototype tooling and production tooling (soft tooling vs hard tooling)?<\/summary><div class=\"a\"><p>Prototype (soft) tooling is built to make a limited number of parts for fit and appearance testing. Production (hard) tooling is built for repeat orders with stable dimensions.<\/p><\/div><\/details><details><summary>How much does an injection mold cost for car exterior parts?<\/summary><div class=\"a\"><p>Injection mold cost depends on part size, the number of cavities, undercuts that need slides or lifters, surface texture, material and the number of trials. We quote the mold per part after the DFM review.<\/p><\/div><\/details><details><summary>Who owns the mold when a Chinese factory makes it?<\/summary><div class=\"a\"><p>At Yirox, mold ownership is agreed per project and written into the quotation before tooling starts.<\/p><\/div><\/details><details><summary>Can you sign an NDA before I send drawings?<\/summary><div class=\"a\"><p>Yes. We can sign an NDA before you share drawings, 3D files or samples.<\/p><\/div><\/details><details><summary>Do you provide a DFM report?<\/summary><div class=\"a\"><p>Yes. Every new tooling project starts with a DFM report covering wall thickness, draft, gates, parting lines, undercuts and cosmetic faces.<\/p><\/div><\/details><details><summary>Can you modify an existing mold instead of building a new one?<\/summary><div class=\"a\"><p>Often, yes. Logo inserts, clip changes, hole positions and texture updates can usually be made on an existing tool. We will tell you if a new tool is the better choice.<\/p><\/div><\/details><details><summary>What is first article inspection?<\/summary><div class=\"a\"><p>First article inspection checks the first parts from a new or modified tool against the drawing and approved sample, covering dimensions, appearance and assembly. We support it with CMM measurement.<\/p><\/div><\/details><details><summary>Can I get samples before mass production?<\/summary><div class=\"a\"><p>Yes. You approve physical samples for fit and appearance before any volume order.<\/p><\/div><\/details><\/div><\/section>\n<section class=\"ctab\" id=\"request-a-tooling-quote\"><div class=\"c\"><h2>Request a Tooling&nbsp;Quote<\/h2><p class=\"ctat\">Send a 3D file, drawing or sample and we will reply with a DFM review and tooling quote.<\/p><div class=\"btns\"><a class=\"btn btn-r\" href=\"\/contact\/\">Request a Tooling Quote \u2192<\/a><a class=\"btn btn-o\" href=\"\/sourcing-solutions\/\">Open the Sourcing Advisor<\/a><\/div><\/div><\/section>\n<\/div>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@graph\": [{\"@type\": \"Service\", \"name\": \"Injection mold tooling and sampling\", \"serviceType\": \"Injection mold tooling and sampling\", \"description\": \"Injection mold tooling and prototype sampling for automotive exterior parts: DFM report, trial samples, FAI and CMM checks, ABS\/PP\/TPO\/ASA, NDA available.\", \"url\": \"https:\/\/yiroxautoparts.com\/services\/tooling-sampling\/\", \"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 long does injection mold tooling take?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Lead time depends on product and scale. 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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='11335' \/><input type=\"hidden\" id=\"_fluentform_1_fluentformnonce\" name=\"_fluentform_1_fluentformnonce\" value=\"9605c9e501\" \/><input type=\"hidden\" name=\"_wp_http_referer\" value=\"\/es\/wp-json\/wp\/v2\/pages\/11335\" \/><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; 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Yirox designs and builds injection mold tooling for bumpers, lips, spoilers, trim and wheel center caps, then proves each tool with trial samples until fit, [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":11334,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-11335","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/yiroxautoparts.com\/es\/wp-json\/wp\/v2\/pages\/11335","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yiroxautoparts.com\/es\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/yiroxautoparts.com\/es\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/yiroxautoparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/yiroxautoparts.com\/es\/wp-json\/wp\/v2\/comments?post=11335"}],"version-history":[{"count":14,"href":"https:\/\/yiroxautoparts.com\/es\/wp-json\/wp\/v2\/pages\/11335\/revisions"}],"predecessor-version":[{"id":12159,"href":"https:\/\/yiroxautoparts.com\/es\/wp-json\/wp\/v2\/pages\/11335\/revisions\/12159"}],"up":[{"embeddable":true,"href":"https:\/\/yiroxautoparts.com\/es\/wp-json\/wp\/v2\/pages\/11334"}],"wp:attachment":[{"href":"https:\/\/yiroxautoparts.com\/es\/wp-json\/wp\/v2\/media?parent=11335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}