Injection molding nozzle
AssigneeHusky Injection Molding Systems Ltd.
InventorsPaul Richard Blais, Stephen J. Cernava, Fadi Fikani
Life of this patent
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Abstract
A nozzle for an injection molding runner system comprises a nozzle housing having a melt channel through it, a nozzle tip having a tip channel and at least one outlet aperture in communication with the tip channel, and a tip retainer that retains the nozzle tip against the nozzle housing such that the tip channel communicates with the melt channel. The tip retainer is significantly more thermally conductive than the nozzle tip. A nozzle seal that is significantly less thermally conductive than the tip retainer may be fused with the tip retainer, and may be annularly spaced from the nozzle tip.
Claims20
A nozzle for an injection molding runner system, comprising:
- a nozzle housing having a melt channel through it;
- a nozzle tip having a tip channel and at least one outlet aperture in communication with the tip channel;
- and
- a tip retainer that retains the nozzle tip against the nozzle housing such that the tip channel communicates with the melt channel, the tip retainer being significantly more thermally conductive than the nozzle tip.
A nozzle for an injection molding system, comprising:
- a nozzle housing having a melt channel through it;
- a nozzle tip having a tip channel and at least one outlet aperture in communication with the tip channel;
- and
- a tip retainer attached to the nozzle housing, the tip retainer retaining the nozzle tip against the nozzle housing such that the tip channel communicates with the melt channel;
- wherein:
- a) the tip retainer is manufactured substantially if not entirely from one of:
- i) beryllium copper alloy made according to any of the ASTM C17000 series specifications;
- and
- ii) a copper alloy made according to the ASTM C18000 specification;
- b) the nozzle tip is manufactured substantially if not entirely from one of:
- i) stainless steel;
- ii) tool steel;
- and
- iii) carbide.
A nozzle for an injection molding hot runner system, comprising:
- a nozzle housing having a melt channel through it and a proximal end with threads;
- a nozzle tip having a tip channel and at least one outlet aperture in fluid communication with the tip channel;
- a tip retainer having threads that engage the threads of the nozzle housing so that the tip retainer is removably attached to the nozzle housing and retains the nozzle tip against the nozzle housing such that the tip channel communicates with the melt channel, the tip retainer being formed of a material that is significantly more thermally conductive than the material forming the nozzle tip;
- and
- a nozzle seal fused to the tip retainer, the nozzle seal being formed of a material that is significantly less thermally conductive than that forming the tip retainer.
Dependencies are inferred from the claim text.