{"id":6504,"date":"2026-09-21T07:00:58","date_gmt":"2026-09-21T07:00:58","guid":{"rendered":"https:\/\/mouldzone.com\/blog\/?p=6504"},"modified":"2026-09-21T07:00:58","modified_gmt":"2026-09-21T07:00:58","slug":"multi-cavity-injection-moulds","status":"publish","type":"post","link":"https:\/\/mouldzone.com\/blog\/multi-cavity-injection-moulds\/","title":{"rendered":"Multi-Cavity Injection Moulds"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

A multi-cavity injection mould<\/strong> is an injection mould that contains two or more cavities<\/strong>, allowing multiple plastic parts to be produced during a single injection cycle. It is commonly used for medium- and high-volume production where increased output and consistent part quality are important.<\/p>\n\n\n\n

How Does a Multi-Cavity Mould Work?<\/h3>\n\n\n\n

The basic process is:<\/p>\n\n\n\n

1. Mould Closing<\/strong>
The mould closes, bringing the core and cavity sections together.<\/p>\n\n\n\n

2. Plastic Injection<\/strong>
Molten plastic enters the mould through the sprue and runner system.<\/p>\n\n\n\n

3. Material Distribution<\/strong>
The runner system distributes the molten plastic to the individual cavities.<\/p>\n\n\n\n

4. Filling and Packing<\/strong>
Each cavity is filled and packed with the required amount of material.<\/p>\n\n\n\n

5. Cooling<\/strong>
Cooling channels remove heat while the plastic solidifies.<\/p>\n\n\n\n

6. Mould Opening and Ejection<\/strong>
The mould opens and the ejector system removes the molded parts.<\/p>\n\n\n\n

Several identical parts are therefore produced in one cycle.<\/p>\n\n\n\n

Main Components<\/h3>\n\n\n\n

A multi-cavity injection mould typically includes:<\/p>\n\n\n\n

    \n
  • Multiple cavities<\/strong> \u2013 Form the external shape of the parts.<\/li>\n\n\n\n
  • Multiple cores<\/strong> \u2013 Form internal features.<\/li>\n\n\n\n
  • Sprue<\/strong> \u2013 Main material entry passage.<\/li>\n\n\n\n
  • Runner system<\/strong> \u2013 Distributes molten plastic to the cavities.<\/li>\n\n\n\n
  • Gates<\/strong> \u2013 Control material entry into individual cavities.<\/li>\n\n\n\n
  • Cooling channels<\/strong> \u2013 Control mould temperature.<\/li>\n\n\n\n
  • Ejector system<\/strong> \u2013 Removes the finished parts.<\/li>\n\n\n\n
  • Guide pins and bushes<\/strong> \u2013 Maintain mould alignment.<\/li>\n\n\n\n
  • Vents<\/strong> \u2013 Allow trapped air and gases to escape.<\/li>\n<\/ul>\n\n\n\n

    Types of Multi-Cavity Arrangements<\/h3>\n\n\n\n

    1. Balanced Layout<\/h4>\n\n\n\n

    The cavities are arranged so that the flow path and filling conditions are as uniform as possible.<\/p>\n\n\n\n

    A balanced layout can help achieve consistent filling across the cavities.<\/p>\n\n\n\n

    2. Family Mould<\/h4>\n\n\n\n

    A family mould contains cavities for different related components<\/strong> rather than identical parts.<\/p>\n\n\n\n

    For example, several components of a product assembly may be molded in the same cycle.<\/p>\n\n\n\n

    Advantages of Multi-Cavity Injection Moulds<\/h3>\n\n\n\n

    1. Higher Production Output<\/strong>
    Multiple parts are produced during every cycle, increasing productivity.<\/p>\n\n\n\n

    2. Lower Cycle Cost per Part<\/strong>
    When production volumes are sufficiently high, the machine cycle is shared across multiple parts.<\/p>\n\n\n\n

    3. Consistent Parts<\/strong>
    Identical cavities can produce multiple parts under the same process conditions.<\/p>\n\n\n\n

    4. Efficient High-Volume Production<\/strong>
    Multi-cavity moulds are particularly useful when large quantities of the same component are required.<\/p>\n\n\n\n

    5. Better Machine Utilization<\/strong>
    More parts can be produced from each machine cycle.<\/p>\n\n\n\n

    Limitations<\/h3>\n\n\n\n
      \n
    • Higher mould manufacturing cost<\/li>\n\n\n\n
    • More complex mould design<\/li>\n\n\n\n
    • More complicated runner and cooling systems<\/li>\n\n\n\n
    • Cavity-to-cavity filling must be carefully controlled<\/li>\n\n\n\n
    • Maintenance can be more involved<\/li>\n\n\n\n
    • Imbalance between cavities can cause variations in part quality<\/li>\n<\/ul>\n\n\n\n

      Single-Cavity vs. Multi-Cavity<\/h3>\n\n\n\n
      Feature<\/th>Single-Cavity<\/th>Multi-Cavity<\/th><\/tr><\/thead>
      Parts per cycle<\/td>1<\/td>2 or more<\/td><\/tr>
      Production output<\/td>Lower<\/td>Higher<\/td><\/tr>
      Tooling complexity<\/td>Generally simpler<\/td>Generally more complex<\/td><\/tr>
      Initial tooling investment<\/td>Generally lower<\/td>Generally higher<\/td><\/tr>
      Flow balancing<\/td>Simple<\/td>Important<\/td><\/tr>
      Suitable production<\/td>Low-volume\/prototypes<\/td>Medium- to high-volume<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

      Important Design Considerations<\/h3>\n\n\n\n

      When designing a multi-cavity mould, engineers need to consider:<\/p>\n\n\n\n

        \n
      • Number of cavities<\/li>\n\n\n\n
      • Cavity layout<\/li>\n\n\n\n
      • Runner and gate design<\/li>\n\n\n\n
      • Flow balance<\/li>\n\n\n\n
      • Cooling system<\/li>\n\n\n\n
      • Ejection system<\/li>\n\n\n\n
      • Mould material<\/li>\n\n\n\n
      • Machine capacity<\/li>\n\n\n\n
      • Part tolerances<\/li>\n\n\n\n
      • Expected production volume<\/li>\n<\/ul>\n\n\n\n

        In Short<\/h3>\n\n\n\n

        Multi-cavity injection moulds produce multiple plastic parts in a single injection cycle.<\/strong> They are especially useful for high-volume manufacturing because they can significantly increase production output and reduce the effective processing cost per part. Proper cavity layout, flow balancing, cooling, and ejection design<\/strong> are essential for consistent results.<\/p>\n\n\n\n

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

        A multi-cavity injection mould is an injection mould that contains two or more cavities, allowing multiple plastic parts to be produced during a single injection cycle. It is commonly used for medium- and high-volume production where increased output and consistent part quality are important. How Does a Multi-Cavity Mould Work? The basic process is: 1. […]<\/p>\n","protected":false},"author":1,"featured_media":6506,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"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":"","adv-header-id-meta":"","stick-header-meta":"","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-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":"","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":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6504","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-other"],"_links":{"self":[{"href":"https:\/\/mouldzone.com\/blog\/wp-json\/wp\/v2\/posts\/6504","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mouldzone.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mouldzone.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mouldzone.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mouldzone.com\/blog\/wp-json\/wp\/v2\/comments?post=6504"}],"version-history":[{"count":1,"href":"https:\/\/mouldzone.com\/blog\/wp-json\/wp\/v2\/posts\/6504\/revisions"}],"predecessor-version":[{"id":6507,"href":"https:\/\/mouldzone.com\/blog\/wp-json\/wp\/v2\/posts\/6504\/revisions\/6507"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mouldzone.com\/blog\/wp-json\/wp\/v2\/media\/6506"}],"wp:attachment":[{"href":"https:\/\/mouldzone.com\/blog\/wp-json\/wp\/v2\/media?parent=6504"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mouldzone.com\/blog\/wp-json\/wp\/v2\/categories?post=6504"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mouldzone.com\/blog\/wp-json\/wp\/v2\/tags?post=6504"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}