{"id":4980,"date":"2025-01-09T06:07:54","date_gmt":"2025-01-09T06:07:54","guid":{"rendered":"https:\/\/yushineplastics.com\/?p=4980"},"modified":"2026-03-12T01:29:47","modified_gmt":"2026-03-12T01:29:47","slug":"guia-para-moldes-de-injecao","status":"publish","type":"post","link":"https:\/\/yushineplastics.com\/pt\/guide-to-injection-molds\/","title":{"rendered":"Guia completo para moldes de inje\u00e7\u00e3o: tipos, estruturas e aplica\u00e7\u00f5es"},"content":{"rendered":"

Definition of injection mold:<\/p>\n

An injection mold is a mold used for plastic injection molding<\/a>. It can produce plastic products with complex shapes and precise dimensions or insert them in a single step.<\/p>\n

Classification of injection molds:<\/h2>\n

By molding method:<\/h4>\n

(1) Injection mold: An injection mold is used on an injection molding machine<\/a>. It is mainly used for molding thermoplastic materials, and a few thermosetting plastics suit this mold.<\/p>\n

(2) Compression mold: A mold used on a hydraulic press that employs the compression process to mold plastic parts<\/a>. It is mainly used for molding thermosetting plastics.<\/p>\n

(3) Transfer mold: A mold used on a hydraulic press employing the transfer molding process for plastic parts. It is suitable for molding thermosetting plastics.<\/p>\n

Classification by the number of cavities:<\/h2>\n

\"Single-cavity

(1) Single-cavity mold: A mold with only one cavity, forming one plastic part per cycle.<\/p>\n

\"Multi-cavity

(2) Multi-cavity mold<\/a>: A mold with two or more cavities capable of molding multiple plastic parts in one go.<\/p>\n

\n
\n
\n
\n

Structure of injection molds:<\/h2>\n

Basic structure:<\/p>\n

\"Single-Parting

 <\/p>\n

1. Single-parting surface injection mold<\/p>\n

\"Double

2. Multi-parting surface injection mold<\/p>\n

\"Injection

3 . Injection mold with movable inserts<\/p>\n

\"Single-insert

4. Single-insert injection mold<\/p>\n

\"Automatic

5 . Automatic thread demolding injection mold<\/p>\n

\"Fixed

6. Fixed mold ejection injection mold<\/p>\n

\"Hot

7 . Hot runner injection mold (no sprue condensation waste, improved filling capacity)<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

\n
\n

The basic structure of injection molds is generally divided into the following parts:<\/h2>\n

(1) Molding parts:<\/h4>\n

Core and cavity (both an integral or an assembled structure).<\/p>\n

(2) Gating system:<\/h4>\n

Channels that direct the molten material from the injection molding machine’s nozzle to the cavities, consisting of the leading runner, sub-runner, gate, and cold slug well. The structure and size directly impact the quality of the molded parts.<\/p>\n

(3) Guidance system:<\/h4>\n
    \n
  • Overall movement and fixed mold guidance: provided by guide posts or conical blocks on the mold frame.<\/li>\n
  • Ejection mechanism guidance: provided by guide posts and bushings on the ejector plate.<\/li>\n
  • Lateral parting core-pulling mechanism guidance is provided by slider rails.<\/li>\n<\/ul>\n

    (4) Ejection system:<\/h4>\n

    Ejects the product, consisting of ejector pins (ejector tubes, push plates), retainer plates, leading runner pull rods, and reset rods.<\/p>\n

    (5) Temperature control system:<\/h4>\n

    Cooling water channels, temperature controllers.<\/p>\n

    (6) Venting system:<\/h4>\n

    Methods:<\/p>\n

    (1) Using the parting surface for venting.<\/p>\n

    (2) Using the fit gap of assembled parts for venting.<\/p>\n

    (3) Creating vent grooves.<\/p>\n<\/div>\n<\/div>\n

    <\/div>\n
    <\/div>\n
    <\/div>\n
    <\/div>\n
    <\/div>\n
    <\/div>\n
    <\/div>\n
    <\/div>\n
    <\/div>\n","protected":false},"excerpt":{"rendered":"

    Definition of injection mold: An injection mold is a mold used for plastic injection molding. It can produce plastic products with complex shapes and precise […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"none","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"both","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"","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":"","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-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":"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":""},"mobile":{"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":""}},"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[122],"tags":[],"class_list":["post-4980","post","type-post","status-publish","format-standard","hentry","category-injection-molding-machines"],"acf":[],"yoast_head":"\nComprehensive Guide to Injection Molds: Types, Structures,<\/title>\n<meta name=\"description\" content=\"Explore the essential types and structures of injection molds used in manufacturing. 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