Injection molding method for multi-layer bottomed parisons

Details Injection molding method for multi-layer bottomed parisons Injection molding method for multi-layer bottomed parisons

1987-09-08

1992-08-25

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

2643288, 264513, B29C 4516

Patent

active

051416956

ABSTRACT:
An injection molding method for a multi-layer bottomed parison comprising: using a triple nozzle concentrically comprising a first flowpassage in communication with a nozzle hole, a second flowpassage and a third flowpassage respectively opening to a distal end of the first flowpassage in the inside of the nozzle hole, forming an inner layer and an outer layer of a bottomed parison with a resin from the first flowpassage, and forming a bottomed parison having a five-layer or a four-layer in section comprising an intermediate layer and a center layer or two intermediate layers with resins from the second flowpassage and the third flowpassage.

REFERENCES:
patent: 4174413 (1979-11-01), Yasuike et al.
patent: 4525134 (1985-06-01), McHenry et al.

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