{"id":4265,"date":"2026-10-15T22:28:50","date_gmt":"2026-10-15T14:28:50","guid":{"rendered":"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-mould-draft-undercuts\/"},"modified":"2026-10-15T22:28:50","modified_gmt":"2026-10-15T14:28:50","slug":"carbon-fiber-mould-draft-undercuts","status":"publish","type":"post","link":"https:\/\/www.carbon-fiber-corp.com\/de\/carbon-fiber-mould-draft-undercuts\/","title":{"rendered":"Draft and Undercuts in a Carbon Fiber Mould Review"},"content":{"rendered":"<style>.ly-note{max-width:880px;margin:0 auto;color:#26333c;line-height:1.85;font-size:17px}.ly-note h2{font-size:1.5rem;line-height:1.35;margin:1.8em 0 .6em}.ly-note p{margin:0 0 1.2em}.ly-note .intro{font-size:1.08em}.ly-note figure{margin:2em 0}.ly-note figure img{display:block;width:100%;height:auto}.ly-note figcaption{font-size:.88rem;color:#60727d;line-height:1.55;margin-top:10px}.ly-note ul{padding-left:1.4em}.ly-note li{margin:.45em 0}.ly-note a{color:#8e1e34;text-decoration:underline;text-underline-offset:3px}.ly-note .notes{padding:20px 28px;background:#f0f4f5;border-left:3px solid #296c85;margin:2em 0}.ly-note .notes h2{font-size:1.1rem;margin:0 0 .8em}.ly-note .reading{border-top:1px solid #d9e1e5;margin-top:2em;padding-top:1.1em}.single-post .entry-title{font-size:clamp(1.8rem,3.8vw,2.6rem);line-height:1.25}.single-post .post-thumb-img-content img{width:100%;height:auto;max-height:360px;object-fit:contain;background:#fbfcfc}@media(max-width:600px){.ly-note{font-size:16px}.ly-note h2{font-size:1.3rem}.ly-note .notes{padding:17px}}<\/style>\n<div class=\"ly-note\">\n<p class=\"intro\">A finished shape has to leave its manufacturing tool. Draft is a geometric feature related to that release direction; an undercut can obstruct the path. Review the proposed tool and release movement together before assuming a smooth CAD shape is straightforward to mould.<\/p>\n<p>Identify how each tool element and the part are intended to move during release. The same surface can be clear in one direction and trapped in another. A recommended draft from a particular tooling tutorial is not a universal value for every laminate, finish or moulding route.<\/p>\n<h2>A split tool changes the geometry discussion<\/h2>\n<p>An additional tool split, removable element or different part arrangement may address an obstructed release path. Those choices affect alignment, surface witness lines and manufacturing work. They should be compared with the intended appearance and assembly interfaces, rather than treated as invisible details outside the component design.<\/p>\n<h2>Keep the supplied shape distinct from tool allowances<\/h2>\n<p>Trim allowance and temporary manufacturing features may exist outside the finished outline. Show which surfaces and edges control the delivered component. If geometry changes are proposed to improve release, record whether they affect the finished product or only the tool. This prevents a tooling discussion from quietly changing a mating face, visible edge or required clearance.<\/p>\n<figure><a href=\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261015-06-draft-2.webp\" aria-label=\"Open the full-size diagram\"><img src=\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261015-06-draft-2.webp\" alt=\"An undercut may require a split tool and more than one release path.\" width=\"1600\" height=\"1000\" loading=\"lazy\" decoding=\"async\"><\/a><figcaption>An undercut may require a split tool and more than one release path. <a href=\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261015-06-draft-2.webp\">View full size<\/a>.<\/figcaption><\/figure>\n<aside class=\"notes\">\n<h2>Keep these details together<\/h2>\n<ul>\n<li>Release direction for each tool element<\/li>\n<li>Potentially trapped surfaces<\/li>\n<li>Tool splits and witness lines<\/li>\n<li>Finished geometry versus manufacturing allowance<\/li>\n<\/ul>\n<\/aside>\n<p>Further reading: <a href=\"https:\/\/www.easycomposites.eu\/learning\/CAD-techniques-for-composite-mould-design\">Easy Composites: CAD techniques for composite mould design<\/a>.<\/p>\n<div class=\"reading\">\n<p>Related: <a href=\"https:\/\/www.carbon-fiber-corp.com\/custom-carbon-fiber-tooling-questions-to-settle-before-paying-for-a-mold\/\">Custom Carbon Fiber Tooling: Questions to Settle Before Paying for a Mold<\/a> \u00b7 <a href=\"https:\/\/www.carbon-fiber-corp.com\/carbon-fabric-drape-double-curvature\/\">Why Carbon Fabric Can Wrinkle Over a Double-Curved Shape<\/a>.<\/p>\n<p><a href=\"https:\/\/www.carbon-fiber-corp.com\/contact\/\">Discuss your component with Litian Yunde<\/a> \u00b7 <a href=\"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-guides\/\">Browse the component guides<\/a><\/p>\n<\/div>\n<\/div>\n<p><script type=\"application\/ld+json\" class=\"ly-article-schema\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BlogPosting\", \"@id\": \"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-mould-draft-undercuts\/#article\", \"headline\": \"Draft and Undercuts in a Carbon Fiber Mould Review\", \"description\": \"Draft and undercuts affect how a carbon fiber part leaves its mould. Review the release direction, tool splits and finished geometry together.\", \"image\": [\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261015-06-draft-1.webp\", \"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261015-06-draft-2.webp\"], \"datePublished\": \"2026-10-15T14:28:50Z\", \"mainEntityOfPage\": {\"@type\": \"WebPage\", \"@id\": \"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-mould-draft-undercuts\/\"}, \"author\": {\"@type\": \"Organization\", \"name\": \"Litian Yunde\", \"url\": \"https:\/\/www.carbon-fiber-corp.com\/about\/\"}, \"publisher\": {\"@type\": \"Organization\", \"name\": \"Dongguan Litian Yunde New Materials Technology Co., Ltd.\", \"url\": \"https:\/\/www.carbon-fiber-corp.com\/\"}, \"inLanguage\": \"en\", \"articleSection\": \"Manufacturing & Tooling\"}<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A finished shape has to leave its manufacturing tool. Draft is a geometric feature related to that release direction; an undercut can obstruct the path. Review the proposed tool and release movement together before assuming a smooth CAD shape is straightforward to mould.<\/p>","protected":false},"author":1,"featured_media":4230,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"Carbon Fiber Mould Draft and Undercuts | Litian Yunde","_seopress_titles_desc":"Draft and undercuts affect how a carbon fiber part leaves its mould. 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