Plastics injection molding device with multipositioning construc

Details Plastics injection molding device with multipositioning construc Plastics injection molding device with multipositioning construc

1992-10-02

1994-08-30

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

Including means to prepare parison

2643283, 26432813, 264572, 425535, 425546, B29C 4526

Patent

active

053421914

ABSTRACT:
Gas transmission plugs are placed in a supporting strip portion in plastics injection mold tooling so that an appropriate gas assist injection location can be readily selected, and mated, with a gas injection nozzle thereby eliminating the requirement for pre-drilling mold tooling with gas injection points and removing the tooling from the press so that a gas injection nozzle can be installed relative to the selected injection location. The plugs can be made from porous metal or ceramic with pores that are so small that plastics cannot enter the plug to cause pore clogging. Also, linear gas transmitting passages can be laser beam drilled through plugs of steel or other material with diameters that are sufficiently minute to prevent entry of plastics melt and resultant clogging.

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Sae Technical Paper 910897 Feb. 25-Mar. 1, 1991, "Gas Injection Molding of Thermoplastic Composite Window Guidance Channel" Suresh Shah & Dave Hlavaty.

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