{"id":3956,"date":"2022-09-08T06:05:52","date_gmt":"2022-09-08T12:05:52","guid":{"rendered":"https:\/\/quickparts.com\/designing-for-injection-molding\/"},"modified":"2023-06-19T10:24:14","modified_gmt":"2023-06-19T14:24:14","slug":"designing-for-injection-moulding","status":"publish","type":"post","link":"https:\/\/quickparts.com\/gb\/designing-for-injection-moulding\/","title":{"rendered":"Designing for Injection Moulding"},"content":{"rendered":"<p>As discussed in <a href=\"https:\/\/quickparts.com\/what-is-injection-molding\/\"><u>What Is Injection Moulding,<\/u><\/a>\u00a0parts created for <u><a href=\"https:\/\/quickparts.com\/injection-molding-parts\/\">injection moulding<\/a><\/u> must be designed carefully to facilitate the moulding process. The material used for the part, the part\u2019s desired shape and features, the mould material, and the properties of the moulding machine must all be considered during the design phase.<\/p>\n<p>Design facilitates the versatility of the injection moulding process by considering the designs and its possibilities, including its ultimate purpose, its material, and the mould.<\/p>\n<h2><strong>Basic Design Guidelines for Injection Moulding<\/strong><\/h2>\n<ul>\n<li>\n<figure id=\"attachment_3908\" class=\"thumbnail wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-3909\" src=\"https:\/\/quickparts.com\/wp-content\/uploads\/2022\/09\/injection-molding-parts-300x208.jpg\" alt=\"\" width=\"300\" height=\"208\" srcset=\"https:\/\/quickparts.com\/wp-content\/uploads\/2022\/09\/injection-molding-parts-300x208.jpg 300w, https:\/\/quickparts.com\/wp-content\/uploads\/2022\/09\/injection-molding-parts-1024x709.jpg 1024w, https:\/\/quickparts.com\/wp-content\/uploads\/2022\/09\/injection-molding-parts-768x532.jpg 768w, https:\/\/quickparts.com\/wp-content\/uploads\/2022\/09\/injection-molding-parts.jpg 1200w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/figure>\n<p><strong>Material considerations:<\/strong> Choose material that meets the functional requirements of the part and have good processing characteristics. Also consider the material\u2019s availability [i.e., in stock or short lead time and MOQ (minimum order quantity)] is low.<\/li>\n<li><strong>Wall thickness: <\/strong>The part wall thickness should be as uniform as possible. Uneven wall thickness causes uneven flow, leading to moulding defects. Also, keep the wall thickness within \u201crecommended wall thickness\u201d for the resin used to create the part.<\/li>\n<li><strong>Include Ribs:<\/strong> A plastic part that has been designed within the recommended range may not be strong enough to support itself\/ functional requirements; ribs are added to reinforce the part.<\/li>\n<li><strong>Rib\/Wall Thickness Ratio:<\/strong> Always maintain recommended rib-to-wall thickness ratio so that the thickness at the rib area is not excessive (this can cause sink). Typically, the rib needs to be 0.6 times the wall thickness. Also ensure you have the radius at the junction of the rib\/wall to eliminate stress and facilitate flow.<\/li>\n<li><strong>Draft:<\/strong> Draft is the taper amount for the vertical walls of the plastic part. Without draft, the part may not eject properly or may sustain damage during ejection. Typically, 1 degree draft is recommended; textured surfaces may need more draft depending on texture depth.<\/li>\n<li><strong>Adjust Part Design <\/strong>to eliminate a complex parting line, reduce side actions that are required to release under-cut features from the mould, and eliminate features that require thin steel areas in the mould.<\/li>\n<li><strong>Radius:<\/strong> Add radius on all the sharp corners, as these can generate stress.<\/li>\n<li><strong>Over-Tolerancing: <\/strong>The injection moulding process has limitations. Be aware of the process limitations when specifying the dimensional and geometry tolerance. Refer SPI standards, guidelines for tolerance, based on the part\u2019s material and size.<\/li>\n<\/ul>\n<p>If you\u2019re looking for a partner in <a style=\"text-decoration: underline;\" href=\"https:\/\/quickparts.com\/additive-manufacturing\/\">additive<\/a> or<a style=\"text-decoration: underline;\" href=\"https:\/\/quickparts.com\/traditional-manufacturing\/\"> traditional manufacturing<\/a>, check out our capabilities today. We can help keep your projects moving forward \u2013 <a style=\"text-decoration: underline;\" href=\"https:\/\/quickquote.quickparts.com\/#\/\" target=\"_blank\" rel=\"noopener\">begin a quote now<\/a> or <a style=\"text-decoration: underline;\" href=\"https:\/\/quickparts.com\/contact-quickparts\/\">contact an expert<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>As discussed in What Is Injection Moulding,\u00a0parts created for injection moulding must be designed carefully&hellip;<\/p>\n","protected":false},"author":16,"featured_media":3899,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[63,75],"tags":[],"class_list":{"0":"post-3956","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-manufacturing-knowledge-gb","8":"category-traditional-manufacturing-gb"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.4) - 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