{"id":10560,"date":"2026-02-06T02:58:18","date_gmt":"2026-02-06T02:58:18","guid":{"rendered":"https:\/\/ideal-pro.com\/?p=10560"},"modified":"2026-02-06T05:50:26","modified_gmt":"2026-02-06T05:50:26","slug":"what-are-the-design-basis-for-injection-molds","status":"publish","type":"post","link":"https:\/\/ideal-pro.com\/ko\/what-are-the-design-basis-for-injection-molds\/","title":{"rendered":"What Are the Design Basis for Injection Molds?"},"content":{"rendered":"<p>In <a href=\"https:\/\/ideal-pro.com\/ko\/plastic-injection-molding\/\" target=\"_blank\" rel=\"noopener noreferrer\">\uc0ac\ucd9c \uc131\ud615<\/a><sup id=\"fnref-1\"><a href=\"#fn-1\" class=\"footnote-ref\">1<\/a><\/sup>, mold design directly determines product quality, production efficiency, and manufacturing costs. Below is a comprehensive breakdown of the core design principles, procedures, and key systems that guide professional injection mold development.<\/p>\n<hr>\n<p><img decoding=\"async\" src=\"https:\/\/ideal-pro.com\/wp-content\/uploads\/2026\/02\/what-are-the-design-basis-for-injection-molds.jpg\" alt=\"what are the design basis for injection molds\"><\/p>\n<hr>\n<h2>Core Design Basis<\/h2>\n<h3>1. Dimensional Accuracy &amp; Correctness of Related Dimensions<\/h3>\n<p>The external quality and specific dimensions of plastic products are defined by their functional requirements:<\/p>\n<ul>\n<li><strong>Appearance-focused products<\/strong> (e.g., toys): High aesthetic standards but moderate dimensional precision.<\/li>\n<li><strong>Functional products<\/strong>: Strict dimensional tolerances to ensure performance.<\/li>\n<li><strong>High-precision products<\/strong> (e.g., cameras): Stringent requirements for both appearance and dimensions.<\/li>\n<\/ul>\n<h3>2. <a href=\"https:\/\/www.protolabs.com\/resources\/design-tips\/improving-part-moldability-with-draft\/\" target=\"_blank\" rel=\"noopener noreferrer\">Rationality of Draft Angle<\/a><sup id=\"fnref-2\"><a href=\"#fn-2\" class=\"footnote-ref\">2<\/a><\/sup><\/h3>\n<p>The draft angle is critical for smooth demolding and product integrity:<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/ideal-pro.com\/wp-content\/uploads\/2026\/02\/core-design-basis.jpg\" alt=\"core design basis\"><\/p>\n<ul>\n<li>Ensure sufficient draft to prevent sticking during ejection.<\/li>\n<li>Align the angle with the parting\/split mold surface.<\/li>\n<li>Avoid compromising appearance or wall thickness accuracy.<\/li>\n<li>Prevent weakening of critical structural areas.<\/li>\n<\/ul>\n<hr>\n<h2>Standard Design Procedure<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/ideal-pro.com\/wp-content\/uploads\/2026\/02\/standard-design-procedure.jpg\" alt=\"standard design procedure\"><\/p>\n<h3>1. Analysis of Product Drawings &amp; Physical Samples<\/h3>\n<p>Thoroughly evaluate the product to establish design constraints:<\/p>\n<ul>\n<li>Geometric shape and structural complexity.<\/li>\n<li>Dimensional specifications, tolerances, and design datums.<\/li>\n<li>Technical requirements (e.g., strength, flexibility).<\/li>\n<li>Plastic material grade and surface finish demands.<\/li>\n<\/ul>\n<h3>2. Cavity Quantity &amp; Layout<\/h3>\n<p>Determine the number of cavities based on:<\/p>\n<ul>\n<li>Product weight vs. injection machine capacity.<\/li>\n<li>Projected area vs. clamping force.<\/li>\n<li>Mold size vs. machine&rsquo;s tie-bar spacing.<\/li>\n<li>Product precision, color, and production volume.<\/li>\n<li>Economic efficiency (output value per mold).<\/li>\n<\/ul>\n<p><strong>Cavity Layout Considerations<\/strong>:<\/p>\n<ul>\n<li>Optimize mold size and gating system balance.<\/li>\n<li>Coordinate with core-pulling mechanisms, inserts, and cooling systems.<\/li>\n<li>Adjust based on parting surface and gate position selection.<\/li>\n<\/ul>\n<hr>\n<h2>Key Design Elements<\/h2>\n<h3>1. Parting Surface Selection<\/h3>\n<p>The parting surface should:<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/ideal-pro.com\/wp-content\/uploads\/2026\/02\/key-design-elements.jpg\" alt=\"key design elements\"><\/p>\n<ul>\n<li>Preserve product appearance and precision.<\/li>\n<li>Simplify mold machining (especially cavity fabrication).<\/li>\n<li>Facilitate gating, exhaust, and cooling system integration.<\/li>\n<li>Ensure the product remains on the <strong>\uc6c0\uc9c1\uc774\ub294 \uae08\ud615<\/strong> during demolding.<\/li>\n<li>Accommodate metal inserts easily.<\/li>\n<\/ul>\n<h3>2. Gating System Design<\/h3>\n<p>The gating system controls plastic flow into the cavity. Key steps:<\/p>\n<ol>\n<li><strong>Gate Position Selection<\/strong> (follow these principles):<\/li>\n<\/ol>\n<ul>\n<li>Locate on the parting surface for easy cleaning.<\/li>\n<li>Ensure equal distance to all cavity areas (shortest flow path).<\/li>\n<li>Direct flow toward thick-walled sections for smooth filling.<\/li>\n<li>Avoid impinging on cores\/inserts (prevents deformation).<\/li>\n<li>Minimize weld lines or place them in non-critical areas.<\/li>\n<li>Enable uniform filling and efficient gas evacuation.<\/li>\n<li>Position for easy post-processing without affecting appearance.<\/li>\n<\/ul>\n<ol start=\"2\">\n<li><strong>System Components<\/strong>:<\/li>\n<\/ol>\n<ul>\n<li>Sprue: Main channel connecting the injection machine to the mold.<\/li>\n<li>Runner: Distributes plastic to multiple cavities (optimize cross-section for flow).<\/li>\n<li>Gate: Controls flow rate and pressure (e.g., pin-point, edge, or sub-gates).<\/li>\n<li>Degating Mechanism: For pin-point gates, ensure runner separation during ejection.<\/li>\n<\/ul>\n<h3>3. Exhaust System Design<\/h3>\n<p>Effective venting prevents defects like air traps and burn marks:<\/p>\n<ul>\n<li><strong>Vent Grooves<\/strong>: Position at the last-filled cavity areas. Depth varies by material:\n<ul>\n<li>ABS: &le;0.04 mm<\/li>\n<li>Putty: &le;0.02 mm<\/li>\n<li>POM (Delrin): &le;0.02 mm<\/li>\n<\/ul><\/li>\n<li><strong>Clearance Venting<\/strong>: Use gaps between cores, ejector pins, or special exhaust plugs.<\/li>\n<li><strong>Air Pins<\/strong>: Prevent vacuum deformation during product ejection.<\/li>\n<li><strong>Anti-Vacuum Components<\/strong>: Avoid product adhesion to the mold surface.<\/li>\n<\/ul>\n<h3>4. <a href=\"https:\/\/ideal-pro.com\/nl\/what-are-the-issues-to-be-considered-when-injection-molding-psu-products-made-of-polyurethane\/\" target=\"_blank\" rel=\"noopener noreferrer\">Cooling System Design<\/a><sup id=\"fnref-3\"><a href=\"#fn-3\" class=\"footnote-ref\">3<\/a><\/sup><\/h3>\n<p>Uniform cooling ensures consistent product quality and cycle time reduction. Design considerations:<\/p>\n<ul>\n<li>Cooling channel layout (e.g., parallel, series, or spiral).<\/li>\n<li>Position and size of channels (avoid interfering with other mold components).<\/li>\n<li>Targeted cooling for high-heat areas (e.g., cores, inserts, sliders).<\/li>\n<li>Selection of standard cooling components (pipes, baffles, O-rings).<\/li>\n<li>Sealing structure to prevent water leakage.\n<hr>\n<blockquote>\n<p><strong>Note<\/strong><\/p>\n<h2>Injection mold design is a iterative process&mdash;each system interacts with others. Balancing functionality, manufacturability, and cost requires careful adjustment based on specific product requirements.<\/h2>\n<\/blockquote><\/li>\n<\/ul><div class=\"footnotes\"><hr><ol><li id=\"fn-1\"><p>Explore this resource to gain in-depth knowledge about injection molding, enhancing your design and production efficiency.\r <a href=\"#fnref-1\" class=\"footnote-backref\">&#8617;<\/a><\/p><\/li><li id=\"fn-2\"><p>Exploring this will help you grasp how draft angles influence product integrity and demolding efficiency.\r <a href=\"#fnref-2\" class=\"footnote-backref\">&#8617;<\/a><\/p><\/li><li id=\"fn-3\"><p>Effective cooling design is crucial for maintaining product quality and reducing cycle times.\r <a href=\"#fnref-3\" class=\"footnote-backref\">&#8617;<\/a><\/p><\/li><\/ol><\/div>","protected":false},"excerpt":{"rendered":"<p>In injection molding1, mold design directly determines product quality, production efficiency, and manufacturing costs. Below is a comprehensive breakdown of [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":10570,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[21],"tags":[56],"class_list":["post-10560","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-injection-molds"],"acf":[],"_links":{"self":[{"href":"https:\/\/ideal-pro.com\/ko\/wp-json\/wp\/v2\/posts\/10560","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ideal-pro.com\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ideal-pro.com\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ideal-pro.com\/ko\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ideal-pro.com\/ko\/wp-json\/wp\/v2\/comments?post=10560"}],"version-history":[{"count":5,"href":"https:\/\/ideal-pro.com\/ko\/wp-json\/wp\/v2\/posts\/10560\/revisions"}],"predecessor-version":[{"id":10575,"href":"https:\/\/ideal-pro.com\/ko\/wp-json\/wp\/v2\/posts\/10560\/revisions\/10575"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ideal-pro.com\/ko\/wp-json\/wp\/v2\/media\/10570"}],"wp:attachment":[{"href":"https:\/\/ideal-pro.com\/ko\/wp-json\/wp\/v2\/media?parent=10560"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ideal-pro.com\/ko\/wp-json\/wp\/v2\/categories?post=10560"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ideal-pro.com\/ko\/wp-json\/wp\/v2\/tags?post=10560"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}