{"id":2712,"date":"2026-07-10T00:56:21","date_gmt":"2026-07-09T16:56:21","guid":{"rendered":"https:\/\/www.xsd-precision.com\/zinc-die-casting-over-polishing-quality-problem-case-study\/"},"modified":"2026-08-01T22:00:44","modified_gmt":"2026-08-01T14:00:44","slug":"zinc-die-casting-over-polishing-quality-problem-case-study","status":"publish","type":"post","link":"https:\/\/www.xsd-precision.com\/zh\/zinc-die-casting-over-polishing-quality-problem-case-study\/","title":{"rendered":"Zinc Die Casting Over-Polishing Quality Problem Case Study"},"content":{"rendered":"<article id=\"xsd-standard-resource-article\" class=\"xsd-resource-article xsd-resource-article--engineering-guide\" lang=\"zh-CN\" data-xsd-resource-id=\"XSD-RESOURCE-2712\" data-xsd-resource-version=\"v1.0\" data-xsd-resource-language=\"zh-CN\" data-xsd-article-format=\"standard-v1\" data-xsd-seo-title=\"Zinc Die Casting Over-Polishing Quality Problem Case Study | XSD Precision\" data-xsd-seo-description=\"XSD Precision engineering resource for Zinc Die Casting Over-Polishing Quality Problem Case Study, covering TPMS buyer checks, validation points, sourcing risk, and project.\"><style>#xsd-standard-resource-article,#xsd-standard-resource-article *{box-sizing:border-box;letter-spacing:0}html body:not(.wp-admin) .entry-content:has(#xsd-standard-resource-article),html body:not(.wp-admin) .wp-block-post-content:has(#xsd-standard-resource-article){max-width:none!important;width:100%!important;margin:0!important;padding:0!important}#xsd-standard-resource-article{width:min(1120px,calc(100vw - 40px));margin:0 auto 72px;padding:28px 0 0;color:#172231;font-family:Inter,\"Noto Sans SC\",\"Microsoft YaHei\",Arial,sans-serif}#xsd-standard-resource-article .xsd-guide-hero,#xsd-standard-resource-article .xsd-guide-section{border:1px solid #d9e2ec;background:#fff;padding:26px 28px}#xsd-standard-resource-article .xsd-guide-hero{border-top:4px solid #d71920}#xsd-standard-resource-article .xsd-guide-section{margin-top:22px}#xsd-standard-resource-article .xsd-guide-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}#xsd-standard-resource-article .xsd-guide-meta span{padding:5px 9px;border:1px solid #d9e2ec;background:#f6f8fa;color:#465668;font-size:12px;font-weight:800}#xsd-standard-resource-article h1{margin:0;color:#101820;font-size:36px;line-height:1.18;font-weight:900}#xsd-standard-resource-article h2{margin:0 0 14px;color:#101820;font-size:24px;line-height:1.3}#xsd-standard-resource-article h3{margin:18px 0 10px;color:#172231;font-size:18px;line-height:1.35}#xsd-standard-resource-article p,#xsd-standard-resource-article li{color:#27384a;font-size:15px;line-height:1.75}#xsd-standard-resource-article .xsd-guide-lead{max-width:920px;font-size:16px;font-weight:600}#xsd-standard-resource-article .xsd-guide-toc{margin-top:18px;padding:15px 18px;border-left:3px solid #205f9f;background:#f4f7fa}#xsd-standard-resource-article .xsd-guide-toc nav{display:flex;flex-wrap:wrap;gap:8px 16px;margin-top:8px}#xsd-standard-resource-article a{color:#205f9f}#xsd-standard-resource-article .xsd-guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}#xsd-standard-resource-article .xsd-guide-panel{padding:16px;border-left:3px solid #8094a8;background:#f7f9fb}#xsd-standard-resource-article .xsd-guide-table-wrap{overflow-x:auto;border:1px solid #d9e2ec;margin-top:12px}#xsd-standard-resource-article table{width:100%;min-width:720px;border-collapse:collapse}#xsd-standard-resource-article th,#xsd-standard-resource-article td{padding:12px 14px;border-top:1px solid #e2e9ef;text-align:left;vertical-align:top}#xsd-standard-resource-article th{background:#edf2f6}#xsd-standard-resource-article img,#xsd-standard-resource-article video,#xsd-standard-resource-article iframe{max-width:100%;height:auto}#xsd-standard-resource-article pre,#xsd-standard-resource-article code{white-space:pre-wrap;overflow-wrap:anywhere}#xsd-standard-resource-article .xsd-guide-conclusion{border-left:4px solid #d71920;background:#f8fafc}#xsd-standard-resource-article .xsd-guide-actions{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-top:22px;padding:18px 20px;border:1px solid #d5e0e8;background:#eef3f7}#xsd-standard-resource-article .xsd-guide-actions a{padding:10px 14px;background:#205f9f;color:#fff;font-weight:850;text-decoration:none}@media(max-width:820px){#xsd-standard-resource-article{width:calc(100vw - 28px);padding-top:16px}#xsd-standard-resource-article .xsd-guide-hero,#xsd-standard-resource-article .xsd-guide-section{padding:20px 16px}#xsd-standard-resource-article h1{font-size:28px}#xsd-standard-resource-article .xsd-guide-grid{grid-template-columns:1fr}#xsd-standard-resource-article .xsd-guide-actions{align-items:stretch;flex-direction:column}#xsd-standard-resource-article .xsd-guide-actions a{width:100%;text-align:center}}<\/style><header class=\"xsd-guide-hero\"><div class=\"xsd-guide-meta\"><span>XSD-RESOURCE-2712<\/span><span>v1.0<\/span><span>\u66f4\u65b0\u65e5\u671f: 2026-08-01<\/span><span>\u5de5\u7a0b\u8d44\u6e90<\/span><span>zh-CN<\/span><\/div><h1>Zinc Die Casting Over-Polishing Quality Problem Case Study<\/h1><p class=\"xsd-guide-lead\">XSD Precision engineering resource for Zinc Die Casting Over-Polishing Quality Problem Case Study, covering TPMS buyer checks, validation points, sourcing risk, and project.<\/p><div class=\"xsd-guide-toc\"><strong>\u672c\u6587\u5185\u5bb9<\/strong><nav><a href=\"#details-1\">Problem Description<\/a><a href=\"#details-2\">Why Over-Polishing Happens<\/a><a href=\"#details-3\">How to Judge the Defect<\/a><a href=\"#details-4\">Control Plan<\/a><a href=\"#details-5\">Engineering Recommendation<\/a><\/nav><\/div><\/header><section id=\"overview\" class=\"xsd-guide-section\"><h2>\u4e13\u4e1a\u5224\u65ad<\/h2><div class=\"xsd-guide-grid\"><div class=\"xsd-guide-panel\"><b>XSD Precision<\/b><p>XSD Precision \u4ee5\u54c1\u724c\u5546\u3001\u670d\u52a1\u5546\u3001\u65b9\u6848\u63d0\u4f9b\u5546\u548c\u95ee\u9898\u89e3\u51b3\u4e13\u5bb6\u7684\u8eab\u4efd\uff0c\u4e3a TPMS \u4e0e\u6c7d\u8f66\u7cbe\u5bc6\u5de5\u7a0b\u9879\u76ee\u63d0\u4f9b\u4ece\u9700\u6c42\u8bc4\u5ba1\u3001\u5de5\u7a0b\u9a8c\u8bc1\u5230\u4ea4\u4ed8\u51c6\u5907\u7684\u4e13\u4e1a\u652f\u6301\u3002<\/p><\/div><div class=\"xsd-guide-panel\"><b>\u9002\u7528\u8fb9\u754c<\/b><p>XSD Precision engineering resource for Zinc Die Casting Over-Polishing Quality Problem Case Study, covering TPMS buyer checks, validation points, sourcing risk, and project.<\/p><\/div><\/div><\/section><section id=\"details-1\" class=\"xsd-guide-section\"><h2>Problem Description<\/h2><p>The defect shown in the production photos is typical over-polishing: the operator removes too much material around the edge and contour area. The original crisp edge, step line or parting-line visual reference becomes rounded and unclear.<\/p><p class=\"xsd-polish__note\">For decorative zinc die cast parts, polishing is not only a surface cleaning process. It directly affects product geometry, edge definition and customer-perceived quality.<\/p><\/section><section id=\"details-2\" class=\"xsd-guide-section\"><h2>Why Over-Polishing Happens<\/h2><div class=\"xsd-guide-table-wrap\"><table class=\"xsd-polish__table\"><thead><tr><th>Cause<\/th><th>What Happens<\/th><th>Quality Risk<\/th><\/tr><\/thead><tbody><tr><td>Casting defect covered by polishing<\/td><td>Flow marks, parting flash, dents or carbon marks are removed by grinding instead of solving the upstream cause<\/td><td>Edges and lines are consumed while the real casting problem remains<\/td><\/tr><tr><td>No limit sample<\/td><td>Operators judge by experience without a clear OK\/NG boundary<\/td><td>Different workers create different edge shapes<\/td><\/tr><tr><td>Wrong abrasive tool<\/td><td>Coarse belt, hard wheel or high-speed hand tool removes material too quickly<\/td><td>Local flat spots, rounded corners and uneven gloss appear<\/td><\/tr><tr><td>Uncontrolled pressure and time<\/td><td>Polishing force and contact time are not standardized<\/td><td>Good parts become NG parts during finishing<\/td><\/tr><tr><td>No protected edge design<\/td><td>Critical edge or decorative line has no fixture protection<\/td><td>Feature line disappears after repeated polishing<\/td><\/tr><\/tbody><\/table><\/div><\/section><section id=\"details-3\" class=\"xsd-guide-section\"><h2>How to Judge the Defect<\/h2><div class=\"xsd-polish__decision\"><div><b>Visual<\/b><span>Check whether the edge, corner radius, step line and decorative contour are still clear under the same light angle.<\/span><\/div><div><b>Dimensional<\/b><span>Measure local width, thickness, radius and mating gap before and after polishing to confirm material removal.<\/span><\/div><div><b>Batch<\/b><span>Separate data by operator, tool, abrasive grade, polishing time and cavity number to locate the main variation source.<\/span><\/div><\/div><\/section><section id=\"details-4\" class=\"xsd-guide-section\"><h2>Control Plan<\/h2><ul><li>Create OK, warning and NG limit samples for edge definition, contour line and surface gloss.<\/li><li>Define no-polish or light-polish protected zones around decorative edges, parting lines and assembly references.<\/li><li>Replace free-hand heavy grinding with fixture-guided polishing where the edge must be preserved.<\/li><li>Use finer abrasive sequence and reduce single-step material removal instead of one aggressive grinding operation.<\/li><li>Record abrasive type, tool speed, contact pressure and polishing time for production repeatability.<\/li><li>Fix upstream casting causes such as flash, flow mark, shrinkage or carbon mark instead of relying on polishing to hide them.<\/li><\/ul><\/section><section id=\"details-5\" class=\"xsd-guide-section\"><h2>Engineering Recommendation<\/h2><div class=\"xsd-guide-table-wrap\"><table class=\"xsd-polish__table\"><thead><tr><th>Stage<\/th><th>Required Action<\/th><th>Acceptance Evidence<\/th><\/tr><\/thead><tbody><tr><td>Mold trial<\/td><td>Confirm whether the edge and parting line are already clean before polishing<\/td><td>Trial samples and cavity-separated photos<\/td><\/tr><tr><td>Polishing setup<\/td><td>Lock abrasive grade, fixture, motion direction and maximum polishing time<\/td><td>Process instruction and operator training record<\/td><\/tr><tr><td>First article<\/td><td>Compare with limit sample before batch production<\/td><td>Approved first article photos and measurement data<\/td><\/tr><tr><td>Mass production<\/td><td>Inspect contour line, edge radius, mating gap and appearance consistency<\/td><td>Sampling record and defect Pareto<\/td><\/tr><\/tbody><\/table><\/div><p class=\"xsd-polish__note\">Conclusion: over-polishing is a process-control failure. The right solution is to reduce upstream defects, protect critical edges, define limit samples and control polishing parameters. Do not use grinding as an unlimited repair method.<\/p><\/section><section id=\"related\" class=\"xsd-guide-section\"><h2>\u76f8\u5173\u8d44\u6e90<\/h2><ul><li><a href=\"\/zh\/article-library\/\">\u8d44\u6e90\u4e2d\u5fc3<\/a><\/li><li><a href=\"\/zh\/solutions\/\">\u89e3\u51b3\u65b9\u6848<\/a><\/li><li><a href=\"\/zh\/contact-us\/?source=resource-center#project-details\">\u8054\u7cfb XSD Precision<\/a><\/li><\/ul><\/section><section class=\"xsd-guide-actions\"><p>\u5982\u9700\u7ed3\u5408\u5177\u4f53\u8f66\u578b\u3001\u4ea7\u54c1\u578b\u53f7\u3001\u9a8c\u8bc1\u76ee\u6807\u6216\u5236\u9020\u51c6\u5907\u8981\u6c42\u8fdb\u884c\u8bc4\u4f30\uff0c\u8bf7\u5411 XSD Precision \u63d0\u4f9b\u9879\u76ee\u8d44\u6599\u3001\u56fe\u7eb8\u3001\u89c4\u683c\u3001\u76ee\u6807\u5e02\u573a\u548c\u9a8c\u8bc1\u8fb9\u754c\u3002<\/p><a href=\"\/zh\/contact-us\/?source=resource-center#project-details\">\u63d0\u4ea4\u9879\u76ee\u8d44\u6599\u4e0e RFQ<\/a><\/section><script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"TechArticle\",\"headline\":\"Zinc Die Casting Over-Polishing Quality Problem Case Study\",\"description\":\"XSD Precision engineering resource for Zinc Die Casting Over-Polishing Quality Problem Case Study, covering TPMS buyer checks, validation points, sourcing risk, and project.\",\"datePublished\":\"2026-07-10T00:56:21\",\"dateModified\":\"2026-08-01\",\"inLanguage\":\"zh-CN\",\"identifier\":\"XSD-RESOURCE-2712-zh-CN\",\"publisher\":{\"@type\":\"Organization\",\"name\":\"XSD Precision\"}}<\/script><\/article>","protected":false},"excerpt":{"rendered":"<p>XSD Precision engineering resource for Zinc Die Casting Over-Polishing Quality Problem Case Study, covering TPMS buyer checks, validation points, sourcing risk, and project.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[58,59,28],"tags":[79,88,134,121,86],"class_list":["post-2712","post","type-post","status-publish","format-standard","hentry","category-case-studies","category-technical-solutions","category-die-casting","tag-case-studies","tag-die-casting","tag-polishing","tag-quality-control","tag-zinc-alloy-die-casting"],"_links":{"self":[{"href":"https:\/\/www.xsd-precision.com\/zh\/wp-json\/wp\/v2\/posts\/2712","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xsd-precision.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xsd-precision.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xsd-precision.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xsd-precision.com\/zh\/wp-json\/wp\/v2\/comments?post=2712"}],"version-history":[{"count":8,"href":"https:\/\/www.xsd-precision.com\/zh\/wp-json\/wp\/v2\/posts\/2712\/revisions"}],"predecessor-version":[{"id":5798,"href":"https:\/\/www.xsd-precision.com\/zh\/wp-json\/wp\/v2\/posts\/2712\/revisions\/5798"}],"wp:attachment":[{"href":"https:\/\/www.xsd-precision.com\/zh\/wp-json\/wp\/v2\/media?parent=2712"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xsd-precision.com\/zh\/wp-json\/wp\/v2\/categories?post=2712"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xsd-precision.com\/zh\/wp-json\/wp\/v2\/tags?post=2712"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}