{"id":31486,"date":"2024-02-09T17:02:35","date_gmt":"2024-02-09T17:02:35","guid":{"rendered":"https:\/\/xometry.pro\/?post_type=articles&#038;p=31486"},"modified":"2024-11-13T14:42:53","modified_gmt":"2024-11-13T13:42:53","slug":"vacuum-casting-design-tips","status":"publish","type":"articles","link":"https:\/\/xometry.pro\/en-eu\/articles\/vacuum-casting-design-tips\/","title":{"rendered":"Design Tips for Vacuum Casting"},"content":{"rendered":"<div role=\"navigation\" aria-label=\"Table of Contents\" class=\"simpletoc wp-block-simpletoc-toc\"><h2 class=\"simpletoc-title\">Table of Contents<\/h2>\n<ul class=\"simpletoc-list\">\n<li><a href=\"#h-vacuum-casting-process-amp-characteristics\">Vacuum Casting Process &amp; Characteristics<\/a>\n\n\n<\/li>\n\n<li><a href=\"#h-vacuum-casting-process-considerations\">Vacuum Casting Process Considerations<\/a>\n\n<\/li>\n<li><a href=\"#h-vacuum-casting-design-tips\">Vacuum Casting Design Tips<\/a>\n\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<li><a href=\"#h-designing-for-material-properties\">Designing for Material Properties<\/a>\n\n\n<\/li>\n\n<li><a href=\"#h-conclusion\">Conclusion<\/a>\n<\/li><\/ul><\/div>\n\n\n<p><a href=\"https:\/\/xometry.eu\/en\/vacuum-casting\/\">Vacuum casting<\/a>, also known as urethane casting, is a method used for low volume production. It produces parts with quality similar to <a href=\"https:\/\/xometry.eu\/en\/injection-moulding\/\">injection molding<\/a> but with much shorter lead times. This process is great for making small batches of plastic or rubber parts using various thermoplastics, rubbers, and resins.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-vacuum-casting-process-amp-characteristics\"><strong>Vacuum Casting Process &amp; Characteristics<\/strong><\/h2>\n\n<h3 class=\"wp-block-heading\" id=\"h-how-does-vacuum-casting-work\"><strong>How Does Vacuum Casting Work?<\/strong><\/h3>\n\n\n<p>Silicone vacuum casting process involves three main stages:<\/p>\n\n\n    <aside class=\"article-content-aside\">\r\n        <a href=\"https:\/\/xometry.pro\/en-eu\/articles\/vacuum-casting-vs-injection-molding\/\" class=\"aside-image sidebar__aside-image\"><img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/07\/vacuum-cast-part.jpg\" alt=\"\"><\/a><a href=\"https:\/\/xometry.pro\/en-eu\/articles\/vacuum-casting-vs-injection-molding\/\" class=\"aside-link\">Vacuum Casting vs. Injection Molding \u2013 What\u2019s the Difference?<\/a>    <\/aside>\r\n    \n\n\n<ol class=\"wp-block-list\">\n<li>Creating a master model using either 3D printing (via SLA or SLS) or CNC machining.<\/li>\n\n\n\n<li>Constructing the silicone tool by pouring liquid silicone rubber around the master pattern and curing it in a vacuum chamber.<\/li>\n\n\n\n<li>Pouring resin into the cavity to generate a production-like replica. This method offers increased freedom and flexibility in part production compared to alternative manufacturing technologies.<\/li>\n<\/ol>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-characteristics-of-vacuum-casting\"><strong>Characteristics of Vacuum Casting<\/strong><\/h3>\n\n<div class=\"custom-table-block \" id=\"table-id-228\" >\r\n\t<div class=\"search-input-wrapper\">\r\n\t\t<svg width=\"16\" height=\"16\" viewBox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n\t\t\t<path d=\"M15.7812 13.833L12.6659 10.7177C12.5252 10.5771 12.3346 10.499 12.1347 10.499H11.6253C12.4877 9.39596 13.0002 8.00859 13.0002 6.49937C13.0002 2.90909 10.0911 0 6.50083 0C2.91056 0 0.00146484 2.90909 0.00146484 6.49937C0.00146484 10.0896 2.91056 12.9987 6.50083 12.9987C8.01006 12.9987 9.39742 12.4863 10.5004 11.6239V12.1332C10.5004 12.3332 10.5786 12.5238 10.7192 12.6644L13.8345 15.7797C14.1282 16.0734 14.6032 16.0734 14.8938 15.7797L15.778 14.8954C16.0718 14.6017 16.0718 14.1267 15.7812 13.833ZM6.50083 10.499C4.29167 10.499 2.50122 8.71165 2.50122 6.49937C2.50122 4.29021 4.28855 2.49976 6.50083 2.49976C8.70999 2.49976 10.5004 4.28708 10.5004 6.49937C10.5004 8.70852 8.71311 10.499 6.50083 10.499Z\" fill=\"#476175\"\/>\r\n\t\t<\/svg>\r\n\t\t<input type=\"search\" class=\"table-search-input\" id=\"table-search-228\" placeholder=\"Table search\">\r\n\t<\/div>\t\r\n\t<div class=\"table-wrapper\">\r\n\t\t<table style=\"border-collapse: collapse; width: 100%; height: 120px;\">\n<tbody>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\"><strong>Maximum Size<\/strong><\/td>\n<td style=\"width: 50%; height: 24px;\">Up to 2000 x 1000 mm<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\"><strong>Vacuum casting materials<\/strong><\/td>\n<td style=\"width: 50%; height: 24px;\">\n<ul>\n<li>Over 10 rigid and rubber-like plastics<\/li>\n<li>Flame-retardant (UL94-V0)<\/li>\n<li>Food-grade (very rare material)<\/li>\n<li>Imitation of glass-filled material (rare material)<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\"><strong>Surface<\/strong><\/td>\n<td style=\"width: 50%; height: 24px;\">Virtually all types of VDI surfaces<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\"><strong>Wall thickness<\/strong><\/td>\n<td style=\"width: 50%; height: 24px;\">No more than 3.5 mm for a good result<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\"><strong>Average mold life<\/strong><\/td>\n<td style=\"width: 50%; height: 24px;\">10-20 runs<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t<\/div>\r\n<\/div>\r\n<style>\r\n\t.custom-table-block table{\r\n\t\theight: initial!important;\r\n\t}\r\n\t.search-input-wrapper{\r\n\t\tposition: relative;\r\n\t\tmargin-bottom: 24px;\r\n\t}\r\n\t.search-input-wrapper svg{\r\n\t\tposition: absolute;\r\n\t\ttop:50%;\r\n\t\tleft:12px;\r\n\t\ttransform: translateY(-50%);\r\n\t}\r\n\t.table-search-input{\r\n\t\tpadding: 0 0 0 40px;\r\n\t\tborder:1px solid #C1CAD1;\r\n\t\theight: 44px;\r\n\t\twidth: 201px;\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t}\r\n\t.table-search-input::placeholder{\r\n\t\tcolor:#092C47;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\ttext-align: left;\r\n\t\twhite-space:nowrap;\r\n\t}\r\n\t\r\n\t.custom-table-block thead{\r\n\t\tmargin-bottom: 14px;\r\n\t}\r\n\r\n\t.custom-table-block tbody tr:nth-child(odd){\r\n\t\tbackground-color: #F6F9FF;\r\n\t}\r\n\r\n\t.custom-table-block tbody, .custom-table-block thead, .custom-table-block tr, .custom-table-block td, .custom-table-block th{\r\n\t\theight: initial!important;\r\n\t}\r\n\t\r\n\t.custom-table-block tbody td{\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tpadding: 7px;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 700;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tcolor:#092C47;\r\n\t\tposition: relative;\r\n\t}\r\n\t.custom-table-block thead th:after{\r\n\t\tcontent:\"\";\r\n\t\tdisplay: inline-block;\r\n\t\tbackground-image: url(\"data:image\/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http:\/\/www.w3.org\/2000\/svg'%3E%3Cpath d='M10.585 0.585938L6 5.17094L1.415 0.585938L0 2.00094L6 8.00094L12 2.00094L10.585 0.585938Z' fill='%23476175'\/%3E%3C\/svg%3E%0A\");\r\n\t\tmargin-left: 8px;\r\n\t\tbackground-position: center center;\r\n\t\tbackground-size: 12px 7.5px;\r\n\t\tbackground-repeat: no-repeat;\r\n\t\twidth: 24px;\r\n\t\theight: 12px;\r\n\t}\r\n\t.custom-table-block{\r\n\t\tmargin: 20px 0;\t\r\n\t}\r\n\t.custom-table-block .table-wrapper{\r\n\t\twidth: 100%;\r\n\t\toverflow-x: auto;\r\n\t}\r\n\t@media(max-width: 768px){\r\n\t\t\/* .custom-table-block tbody td{\r\n\t\t\twhite-space: nowrap;\r\n\t\t} *\/\r\n\t\t.custom-table-block .table-wrapper{\r\n\t\t\tmax-width: calc(100vw - 16px);\r\n\t\t}\r\n\t}\r\n<\/style>\r\n\n\n    <aside class=\"article-content-aside\">\r\n        <a href=\"https:\/\/xometry.pro\/en-eu\/articles\/vacuum-casting-overview\/\" class=\"aside-image sidebar__aside-image\"><img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/Vacuum-thermoforming-machine-in-a-factory.jpeg\" alt=\"Vacuum thermoforming machine in a factory\"><\/a><a href=\"https:\/\/xometry.pro\/en-eu\/articles\/vacuum-casting-overview\/\" class=\"aside-link\">Vacuum Casting: Technology Overview<\/a>    <\/aside>\r\n    \n\n<h2 class=\"wp-block-heading\" id=\"h-vacuum-casting-process-considerations\"><strong>Vacuum Casting Process Considerations<\/strong><\/h2>\n\n\n<p>Considerations regarding the vacuum casting production process are important to note as well:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Surface quality:<\/strong> The silicone mold replicates even the smallest details. Therefore, it&#8217;s crucial to eliminate surface defects to achieve impeccable finishes and smooth surface textures on the master model.<\/li>\n\n\n\n<li><strong>Mold lifespan<\/strong>: Silicone molds degrade over time with use. Depending on factors like part complexity and material choice, molds may last around 10-20 runs on average.<\/li>\n<\/ul>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-vacuum-casting-design-tips\"><strong>Vacuum Casting Design Tips<\/strong><\/h2>\n\n\n<p>To take full advantage of this technology, it is important that your 3D model closely follows a set of geometric recommendations.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><h3 class=\"wp-block-heading\" id=\"h-wall-thickness\"><strong>Wall Thickness<\/strong><\/h3>\n\n\n<p>Consistent wall thickness is essential for successful vacuum casting. Varying thickness can result in uneven cooling and curing rates, potentially causing deformities or weak spots in the part.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"967\" height=\"558\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/wall-thickness.png\" alt=\"\" class=\"wp-image-31511\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/wall-thickness.png 967w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/wall-thickness-300x173.png 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/wall-thickness-768x443.png 768w\" sizes=\"(max-width: 967px) 100vw, 967px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/wall-thickness.png\" data-fancybox=\"gallery-31486\" data-caption=\"\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/wall-thickness.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p>Generally, we recommend a minimum wall thickness of 0.75 mm to 1.5 mm for small to medium-sized parts, with larger parts requiring greater thickness. However, the optimal thickness may depend on your specific project and selected material.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><h3 class=\"wp-block-heading\" id=\"h-bosses\"><strong>Bosses<\/strong><\/h3>\n\n\n<p>Bosses should maintain a minimum height and diameter of 1 mm, while their wall thickness should not exceed 60% of the nominal thickness to reduce sinking.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"511\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/boss-wall-thickness-1024x511.png\" alt=\"\" class=\"wp-image-31523\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/boss-wall-thickness-1024x511.png 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/boss-wall-thickness-300x150.png 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/boss-wall-thickness-768x383.png 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/boss-wall-thickness.png 1231w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/boss-wall-thickness.png\" data-fancybox=\"gallery-31486\" data-caption=\"\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/boss-wall-thickness.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><\/figure>\n<\/div>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-ribs\"><strong>Ribs<\/strong><\/h3>\n\n\n<p>Ribs can bolster strength and diminish warping on expansive flat regions. To mitigate shrinkage and sinking effects, rib thickness should be less than the wall thickness. Experts advise keeping rib thickness below 60% of the nominal wall thickness, with rib height restricted to less than three times its thickness.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"415\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/09\/ribs-and-gussets-1024x415.png\" alt=\"\" class=\"wp-image-11399\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/09\/ribs-and-gussets-1024x415.png 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/09\/ribs-and-gussets-300x122.png 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/09\/ribs-and-gussets-768x312.png 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/09\/ribs-and-gussets-1536x623.png 1536w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/09\/ribs-and-gussets-2048x831.png 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/09\/ribs-and-gussets.png\" data-fancybox=\"gallery-31486\" data-caption=\"Example of ribs added to a flat surface\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/09\/ribs-and-gussets.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Example of ribs added to a flat surface<\/figcaption><\/figure>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-undercuts\"><strong>Undercuts<\/strong><\/h3>\n\n\n<p>Undercuts and overhangs pose challenges in molding and casting as they are hidden or extend over a cavity. However, vacuum casting excels in handling these features more effectively than other manufacturing techniques.<\/p>\n\n\n\n<p>Designing parts with undercuts or overhangs for vacuum casting will affect mold complexity and may necessitate additional considerations or adjustments.<\/p>\n\n\n\n<p>These features are measured from or to the surface of the tool and can hinder tool component extraction. Aim for undercuts no deeper than 15 mm to avoid this issue.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><h3 class=\"wp-block-heading\" id=\"h-embossed-details\"><strong>Embossed Details<\/strong><\/h3>\n\n\n<p>Recessed or embossed text and logos should have a minimum depth or height of 1 mm and a width of 1 mm to ensure visibility. To optimize visibility, maintain a 1 mm gap between letters.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"568\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/embossing-1024x568.png\" alt=\"\" class=\"wp-image-31535\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/embossing-1024x568.png 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/embossing-300x167.png 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/embossing-768x426.png 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/embossing.png 1409w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/embossing.png\" data-fancybox=\"gallery-31486\" data-caption=\"\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/embossing.png\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><\/figure>\n<\/div>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-draft-angles\"><strong>Draft Angles<\/strong><\/h3>\n\n\n<p>Draft angles are crucial in vacuum casting. They entail a slight taper on vertical walls of part designs, enlarging the mold opening compared to its base. This is vital for easy part removal from the mold, minimizing the risk of damage.<\/p>\n\n\n\n<p>Aim for draft angles of 1 to 2 degrees in your design, although the ideal angle can vary based on part geometry and material. Incorporating draft angles enhances mold longevity and improves cast part quality.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"415\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/injection-moulding-draft-angles-1440x584-1-1024x415.webp\" alt=\"Example of draft angles on the mold, allowing the par to be easily removed\" class=\"wp-image-17352\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/injection-moulding-draft-angles-1440x584-1-1024x415.webp 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/injection-moulding-draft-angles-1440x584-1-300x122.webp 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/injection-moulding-draft-angles-1440x584-1-768x311.webp 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/injection-moulding-draft-angles-1440x584-1.webp 1440w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/injection-moulding-draft-angles-1440x584-1.webp\" data-fancybox=\"gallery-31486\" data-caption=\"Example of draft angles on the mold, allowing the par to be easily removed\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/injection-moulding-draft-angles-1440x584-1.webp\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Example of draft angles on the mold, allowing the par to be easily removed<\/figcaption><\/figure>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-summary-of-best-design-practices\"><strong>Summary of Best Design Practices<\/strong><\/h3>\n\n<div class=\"custom-table-block \" id=\"table-id-649\" >\r\n\t<div class=\"search-input-wrapper\">\r\n\t\t<svg width=\"16\" height=\"16\" viewBox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n\t\t\t<path d=\"M15.7812 13.833L12.6659 10.7177C12.5252 10.5771 12.3346 10.499 12.1347 10.499H11.6253C12.4877 9.39596 13.0002 8.00859 13.0002 6.49937C13.0002 2.90909 10.0911 0 6.50083 0C2.91056 0 0.00146484 2.90909 0.00146484 6.49937C0.00146484 10.0896 2.91056 12.9987 6.50083 12.9987C8.01006 12.9987 9.39742 12.4863 10.5004 11.6239V12.1332C10.5004 12.3332 10.5786 12.5238 10.7192 12.6644L13.8345 15.7797C14.1282 16.0734 14.6032 16.0734 14.8938 15.7797L15.778 14.8954C16.0718 14.6017 16.0718 14.1267 15.7812 13.833ZM6.50083 10.499C4.29167 10.499 2.50122 8.71165 2.50122 6.49937C2.50122 4.29021 4.28855 2.49976 6.50083 2.49976C8.70999 2.49976 10.5004 4.28708 10.5004 6.49937C10.5004 8.70852 8.71311 10.499 6.50083 10.499Z\" fill=\"#476175\"\/>\r\n\t\t<\/svg>\r\n\t\t<input type=\"search\" class=\"table-search-input\" id=\"table-search-649\" placeholder=\"Table search\">\r\n\t<\/div>\t\r\n\t<div class=\"table-wrapper\">\r\n\t\t<table style=\"border-collapse: collapse; width: 100%; height: 216px;\">\n<tbody>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\"><strong>Wall Thickness<\/strong><\/td>\n<td style=\"width: 50%; height: 24px;\">At least 0.75-1.0 mm<\/td>\n<\/tr>\n<tr style=\"height: 48px;\">\n<td style=\"width: 50%; height: 48px;\"><strong>Bosses<\/strong><\/td>\n<td style=\"width: 50%; height: 48px;\">Minimum height of 1.0 mm; minimum diameter of 1.0 mm<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\"><strong>Wall Thickness For Bosses<\/strong><\/td>\n<td style=\"width: 50%; height: 24px;\">No more than 60% of wall thickness<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\"><strong>Rib Thickness<\/strong><\/td>\n<td style=\"width: 50%; height: 24px;\">No more than 60% of wall thickness<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\"><strong>Rib Height<\/strong><\/td>\n<td style=\"width: 50%; height: 24px;\">No more than 3x of rib thickness<\/td>\n<\/tr>\n<tr style=\"height: 48px;\">\n<td style=\"width: 50%; height: 48px;\"><strong>Engraved and Embossed Details<\/strong><\/td>\n<td style=\"width: 50%; height: 48px;\">Minimum depth of 1.0mm; minimum width of 1.0 mm<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\"><strong>Draft Angles<\/strong><\/td>\n<td style=\"width: 50%; height: 24px;\">At least 1 to 2 degrees<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t<\/div>\r\n<\/div>\r\n<style>\r\n\t.custom-table-block table{\r\n\t\theight: initial!important;\r\n\t}\r\n\t.search-input-wrapper{\r\n\t\tposition: relative;\r\n\t\tmargin-bottom: 24px;\r\n\t}\r\n\t.search-input-wrapper svg{\r\n\t\tposition: absolute;\r\n\t\ttop:50%;\r\n\t\tleft:12px;\r\n\t\ttransform: translateY(-50%);\r\n\t}\r\n\t.table-search-input{\r\n\t\tpadding: 0 0 0 40px;\r\n\t\tborder:1px solid #C1CAD1;\r\n\t\theight: 44px;\r\n\t\twidth: 201px;\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t}\r\n\t.table-search-input::placeholder{\r\n\t\tcolor:#092C47;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\ttext-align: left;\r\n\t\twhite-space:nowrap;\r\n\t}\r\n\t\r\n\t.custom-table-block thead{\r\n\t\tmargin-bottom: 14px;\r\n\t}\r\n\r\n\t.custom-table-block tbody tr:nth-child(odd){\r\n\t\tbackground-color: #F6F9FF;\r\n\t}\r\n\r\n\t.custom-table-block tbody, .custom-table-block thead, .custom-table-block tr, .custom-table-block td, .custom-table-block th{\r\n\t\theight: initial!important;\r\n\t}\r\n\t\r\n\t.custom-table-block tbody td{\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tpadding: 7px;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 700;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tcolor:#092C47;\r\n\t\tposition: relative;\r\n\t}\r\n\t.custom-table-block thead th:after{\r\n\t\tcontent:\"\";\r\n\t\tdisplay: inline-block;\r\n\t\tbackground-image: url(\"data:image\/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http:\/\/www.w3.org\/2000\/svg'%3E%3Cpath d='M10.585 0.585938L6 5.17094L1.415 0.585938L0 2.00094L6 8.00094L12 2.00094L10.585 0.585938Z' fill='%23476175'\/%3E%3C\/svg%3E%0A\");\r\n\t\tmargin-left: 8px;\r\n\t\tbackground-position: center center;\r\n\t\tbackground-size: 12px 7.5px;\r\n\t\tbackground-repeat: no-repeat;\r\n\t\twidth: 24px;\r\n\t\theight: 12px;\r\n\t}\r\n\t.custom-table-block{\r\n\t\tmargin: 20px 0;\t\r\n\t}\r\n\t.custom-table-block .table-wrapper{\r\n\t\twidth: 100%;\r\n\t\toverflow-x: auto;\r\n\t}\r\n\t@media(max-width: 768px){\r\n\t\t\/* .custom-table-block tbody td{\r\n\t\t\twhite-space: nowrap;\r\n\t\t} *\/\r\n\t\t.custom-table-block .table-wrapper{\r\n\t\t\tmax-width: calc(100vw - 16px);\r\n\t\t}\r\n\t}\r\n<\/style>\r\n\n\n<h2 class=\"wp-block-heading\" id=\"h-designing-for-material-properties\"><strong>Designing for Material Properties<\/strong><\/h2>\n\n\n<p>Material choice is critical in vacuum casting, impacting design outcomes significantly. Variations in flexibility, strength, and temperature resistance among materials necessitate careful consideration during part design.<\/p>\n\n\n\n<p>For materials with high flexibility, assess if your design can handle potential flexing without functional compromise. Conversely, for rigid materials, avoid stress concentrations that may cause cracking or failure.<\/p>\n\n\n\n<p>A successful design considers not only part geometry but also its interaction with the chosen material&#8217;s properties.<\/p>\n\n\n    <aside class=\"article-content-aside\">\r\n        <a href=\"https:\/\/xometry.pro\/en-eu\/articles\/vacuum-casting-materials\/\" class=\"aside-image sidebar__aside-image\"><img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/12\/vacuum-cast-parts.webp\" alt=\"Vacuum cast parts\"><\/a><a href=\"https:\/\/xometry.pro\/en-eu\/articles\/vacuum-casting-materials\/\" class=\"aside-link\">Vacuum Casting Material Selection<\/a>    <\/aside>\r\n    \n\n<h3 class=\"wp-block-heading\" id=\"h-insert-molding-hardware\"><strong>Insert Molding Hardware<\/strong><\/h3>\n\n\n<p>Example applications for vacuum casting encompass soft-feel grips on products like hairbrushes or handheld controllers. It&#8217;s also prevalent in developing medical devices, drug delivery systems, consumer goods, and automotive trim.<\/p>\n\n\n\n<p>The process involves overmolding materials of varying grades of PU, with the secondary molding occurring before the primary molding fully cures. This results in a robust bond between the materials, yielding parts suitable for handling trials.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-what-can-be-overmolded-with-vacuum-casting\"><strong>What Can Be Overmolded With Vacuum Casting?<\/strong><\/h3>\n\n\n<p>Optimal outcomes are achieved through overmolding PU castings. However, we can also overmold CNC machined plastic or metal parts, as well as modified production parts.<\/p>\n\n\n\n<p>Insert molding is commonly employed to integrate purchased components like threaded inserts or electrical contacts, or parts machined in-house, particularly when tight tolerances are crucial. For cases requiring multiple inserts, we can CNC machine a fixture to ensure accurate positioning relative to each other and the mold cavity.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/vacuum-casting-1024x683.jpg\" alt=\"Vacuum cast parts\" class=\"wp-image-31499\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/vacuum-casting-1024x683.jpg 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/vacuum-casting-300x200.jpg 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/vacuum-casting-768x513.jpg 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/vacuum-casting-1536x1025.jpg 1536w, https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/vacuum-casting-2048x1367.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/vacuum-casting-scaled.jpg\" data-fancybox=\"gallery-31486\" data-caption=\"Vacuum cast parts\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/vacuum-casting-scaled.jpg\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Vacuum cast parts<\/figcaption><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusion\"><strong>Conclusion<\/strong><\/h2>\n\n\n<p>Mastering vacuum casting design is crucial for superior part quality, production efficiency, and project success. By following outlined considerations and best practices, engineers and designers can unleash the full potential of <a href=\"https:\/\/xometry.eu\/en\/vacuum-casting\/\">vacuum casting<\/a> technology.<\/p>\n","protected":false},"author":50,"featured_media":31487,"comment_status":"open","ping_status":"closed","template":"","categories":[],"c-tag-articles":[],"global-tag":[570,699],"class_list":["post-31486","articles","type-articles","status-publish","has-post-thumbnail","hentry","global-tag-vacuum-casting-eu","global-tag-design-eu"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Design Tips for Vacuum Casting | Xometry Pro<\/title>\n<meta name=\"description\" content=\"This article delves into key considerations and best practices to optimise your vacuum casting designs effectively.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/xometry.pro\/en-eu\/articles\/vacuum-casting-design-tips\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Design Tips for Vacuum Casting | Xometry Pro\" \/>\n<meta property=\"og:description\" content=\"This article delves into key considerations and best practices to optimise your vacuum casting designs effectively.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/xometry.pro\/en-eu\/articles\/vacuum-casting-design-tips\/\" \/>\n<meta property=\"og:site_name\" content=\"Xometry Pro\" \/>\n<meta property=\"article:modified_time\" content=\"2024-11-13T13:42:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/xometry.pro\/wp-content\/uploads\/2024\/02\/urethane-cast-parts.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"942\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/xometry.pro\\\/en-eu\\\/articles\\\/vacuum-casting-design-tips\\\/\",\"url\":\"https:\\\/\\\/xometry.pro\\\/en-eu\\\/articles\\\/vacuum-casting-design-tips\\\/\",\"name\":\"Design Tips for Vacuum Casting | Xometry Pro\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/xometry.pro\\\/en-eu\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/xometry.pro\\\/en-eu\\\/articles\\\/vacuum-casting-design-tips\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/xometry.pro\\\/en-eu\\\/articles\\\/vacuum-casting-design-tips\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/xometry.pro\\\/wp-content\\\/uploads\\\/2024\\\/02\\\/urethane-cast-parts.webp\",\"datePublished\":\"2024-02-09T17:02:35+00:00\",\"dateModified\":\"2024-11-13T13:42:53+00:00\",\"description\":\"This article delves into key considerations and best practices to optimise your vacuum casting designs effectively.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/xometry.pro\\\/en-eu\\\/articles\\\/vacuum-casting-design-tips\\\/#breadcrumb\"},\"inLanguage\":\"en-EU\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/xometry.pro\\\/en-eu\\\/articles\\\/vacuum-casting-design-tips\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-EU\",\"@id\":\"https:\\\/\\\/xometry.pro\\\/en-eu\\\/articles\\\/vacuum-casting-design-tips\\\/#primaryimage\",\"url\":\"https:\\\/\\\/xometry.pro\\\/wp-content\\\/uploads\\\/2024\\\/02\\\/urethane-cast-parts.webp\",\"contentUrl\":\"https:\\\/\\\/xometry.pro\\\/wp-content\\\/uploads\\\/2024\\\/02\\\/urethane-cast-parts.webp\",\"width\":1200,\"height\":942,\"caption\":\"Vacuum cast parts\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/xometry.pro\\\/en-eu\\\/articles\\\/vacuum-casting-design-tips\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/xometry.pro\\\/en-eu\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Articles\",\"item\":\"https:\\\/\\\/xometry.pro\\\/en-eu\\\/articles\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Vacuum Casting\",\"item\":\"https:\\\/\\\/xometry.pro\\\/en-eu\\\/global-tag\\\/vacuum-casting-eu\\\/\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Design Tips for Vacuum Casting\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/xometry.pro\\\/en-eu\\\/#website\",\"url\":\"https:\\\/\\\/xometry.pro\\\/en-eu\\\/\",\"name\":\"Xometry Pro\",\"description\":\"Knowledge &amp; 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