{"id":408,"date":"2026-07-02T03:07:13","date_gmt":"2026-07-02T03:07:13","guid":{"rendered":"https:\/\/injectionstretchblowmolding.com\/?p=408"},"modified":"2026-07-02T03:07:13","modified_gmt":"2026-07-02T03:07:13","slug":"ibm-mould-design-fundamentals-core-pins-blow-cavities-and-runner-systems","status":"publish","type":"post","link":"https:\/\/injectionstretchblowmolding.com\/es\/application\/ibm-mould-design-fundamentals-core-pins-blow-cavities-and-runner-systems\/","title":{"rendered":"IBM Mould Design Fundamentals: Core Pins, Blow Cavities and Runner Systems"},"content":{"rendered":"
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The Three Tooling Components That Determine Whether Your IBM Container Hits Specification — and the Engineering Decisions Behind Each One<\/h2>\n

Every IBM container is the product of three tooling components working together: the injection cavity (which forms the parison and neck), the core pin (which defines the container’s internal geometry and carries it between stations), and the blow cavity (which inflates and shapes the container body). A fourth system — the runner — connects the injection nozzle to every cavity simultaneously, governing whether all cavities fill equally or whether one cavity runs heavy while another runs light.<\/p>\n

Mould design quality is the single largest variable in IBM container quality. The machine can be perfectly set; the resin can be pharmaceutical grade and perfectly dried; the operator can be experienced — but if the core pin taper is wrong, the runner system unbalanced, or the blow cavity venting inadequate, the container will not meet specification. This guide explains the engineering decisions behind each tooling component, why each decision matters for container quality, and how to specify tooling that produces compliant containers from first shot.<\/p>\n<\/header>\n

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