Injection molding nozzle tip having finned inner insert

Details Injection molding nozzle tip having finned inner insert Injection molding nozzle tip having finned inner insert

2006-06-27

2008-08-19

Heitbrink, Tim (Department: 1791)

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to heat or cool

C264S328150

Reexamination Certificate

active

07413431

ABSTRACT:
A series of injection molding nozzle tips having a novel inner insert. The novel inner insert in accordance with the embodiments of the present invention includes a finned profile having flow channels between the finned sections. The finned profile and its associated flow channels cause the flow of molten plastic in the nozzle to go through a breakup into the flow channels before it is merged at the nozzle flow exit. This breaking up of the molten plastic flow and its merging insures a better mixing of the molten plastic and also reduces stresses within the molded part.

REFERENCES:
patent: 5268184 (1993-12-01), Gellert
patent: 5513976 (1996-05-01), McGrevy
patent: 6962492 (2005-11-01), Olaru et al.

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