Method and apparatus for the multi-unit production of thin-walle

Details Method and apparatus for the multi-unit production of thin-walle Method and apparatus for the multi-unit production of thin-walle

1988-11-16

1990-09-11

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

425150, 425468, 425575, 425577, 425588, B29C 3330

Patent

active

049561430

ABSTRACT:
Thin-walled elongated tubular products are individually formed utilizing injection molding of a plastic melt into a mold cavity having an elongated core pin maintained in substantially centered relation on the interior thereof through the application of tension continuously being applied coaxially to the core pin. Multi-unit or mass production techniques include use of a plurality of mold cavities each successively subjected to receiving a hot plastic melt injection wherein the resulting formed product is, through successive steps, removed from the mold cavity, trimmed, separated from the core pin, and possibly further processed for depositing in collection facilities or transferred to other processing steps. Concurrently, each mold cavity and associated core pin are initially separated, processed separately and reunited for continued and repeated use and further subjected to precise and preprogrammed positioning relative to the inflow of plastic melt in order to overcome any imbalance or inconsistency in flow characteristics of the flow of the hot melt into the mold cavity.

REFERENCES:
patent: 4268243 (1981-05-01), Koshkin et al.
patent: 4332545 (1982-06-01), Cargile
patent: 4750877 (1988-06-01), McFarlane

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