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
Patent
1988-02-08
1989-09-05
Lowe, James
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
2643284, 2643288, 26432814, 26432815, B29C 4516, B29C 4522, B29C 4523, B29C 4574
Patent
active
048636657
ABSTRACT:
Method for tri-injecting a plurality of thermoplastic materials to mold an article having a layered wall structure using thermoplastic materials having different optimum processing temperatures including the maintenance of the optimum temperatures in flow paths individual to each material from its source at least to the injection nozzle. At least two of the nozzle channels are insulated to prevent heat transfer and to maintain the temperature of the thermoplastic materials.
REFERENCES:
patent: 4174413 (1979-11-01), Yasuike
patent: 4518344 (1985-05-01), Latreille
patent: 4609516 (1986-09-01), Krishnakumar
Brown Paul P.
Schad Robert D.
Durkin II Jeremiah F.
Husky Injection Molding Systems Ltd.
Lowe James
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