{"id":5808,"date":"2024-02-05T18:40:51","date_gmt":"2024-02-05T17:40:51","guid":{"rendered":"http:\/\/hybster.com\/?post_type=documentation&p=5808"},"modified":"2026-05-11T12:33:56","modified_gmt":"2026-05-11T10:33:56","slug":"what-is-injection-molding-gate","status":"publish","type":"documentation","link":"https:\/\/hybster.com\/en\/documentation\/quest-ce-que-le-seuil-dinjection-plastique\/","title":{"rendered":"What does injection gate mean ?"},"content":{"rendered":"\n\n\r\n

The injection gate is the entry point of the molten plastic into the cavity of the plastic injection mould.<\/p>\r\n\r\n\r\n\r\n

What is the injection threshold used for?<\/h2>\r\n\r\n\r\n\r\n

The material flows from the plastic injection moulding machine into the mould cavity via the sprue or hot runner, into the runner channels, and then to the gate.
Each part of what is known as the \u00abcluster\u00bb or \u00abfeeding system\u00bb has a specific role.<\/p>\r\n\r\n\r\n\r\n

Sizing follows rules to be applied for each material, depending on its melt flow index (MFI \/ MFR) and its thermal capacity. Indeed, a very fluid material will require less voluminous flow channels than a viscous material.<\/p>\r\n\r\n\r\n\r\n

What are the types of injection thresholds?<\/h2>\r\n\r\n\r\n\r\n

there are different types of injection thresholds, usable or not depending on the desired appearance of the part, Plastic<\/a> :<\/p>\r\n\r\n\r\n\r\n

\"\"<\/figure>\r\n\r\n\r\n\r\n
    \r\n
  • Pin Gate: Pinpoint Injection\u00ab<\/li>\r\n\r\n\r\n\r\n
  • Sprue gate: Direct injection, via runner (requires manual cutting, a bit old school!)<\/li>\r\n\r\n\r\n\r\n
  • Edge gate: side injection: used on the side of the part (requires manual trimming)<\/li>\r\n\r\n\r\n\r\n
  • Fan gate: sheet injection: used, notably for light guides and optical parts (requires laser cutting \/ or pneumatic equipment)<\/li>\r\n\r\n\r\n\r\n
  • Tunnel gate: underwater injection (automatic sprue and part removal \u2013 Widely used in Europe)<\/li>\r\n\r\n\r\n\r\n
  • Cashew gate: squash injection (automatic threshold and part degreasing \u2013 alternative to under-sill)<\/li>\r\n\r\n\r\n\r\n
  • Tunnel \/ Cashew on ejector: Same as above, but instead of injecting onto the edge of the part, a flat is made on an ejector to reach an area inside the part. The \u00abstrut\u00bb is then cut away by hand or left on the part if it does not hinder its use.<\/li>\r\n<\/ul>","protected":false},"author":15,"featured_media":0,"template":"","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false},"famille-de-documentation":[965,966],"class_list":["post-5808","documentation","type-documentation","status-publish","hentry","famille-de-documentation-injection-plastique","famille-de-documentation-moules-dinjection"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t