Coinjection of hollow articles and preforms

Details Coinjection of hollow articles and preforms Coinjection of hollow articles and preforms

1989-02-06

1990-06-05

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264255, 2643288, 26432815, 2642972, 425130, 425588, B29C 4502, B29C 4516

Patent

active

049312340

ABSTRACT:
Method for coinjecting a plurality of thermoplastic materials to mold an article having a layered wall structure using thermoplastic material having different optimum processing temperatures including the maintenance of the optimum temperatures in flow paths individual to each material from its source to a mold cavity.

REFERENCES:
patent: 3973892 (1976-08-01), Rees
patent: 4149839 (1979-04-01), Iwawaki et al.
patent: 4315724 (1982-02-01), Taoka et al.
patent: 4459257 (1984-07-01), Baciu
patent: 4484883 (1984-11-01), Honda et al.

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