Multimanifold extrusion die and coextrusion process

Details Multimanifold extrusion die and coextrusion process Multimanifold extrusion die and coextrusion process

1984-04-27

1985-08-06

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

264171, 4251331, 4251335, A21C 300

Patent

active

045333084

ABSTRACT:
A multimanifold extrusion die that minimizes or eliminates the curtaining effect is provided. This die furthermore also provides for convergence of molten thermoplastic streams at substantially equal flow velocities without external adjustment of the die. More specifically, this die has a self-balancing feature that is responsive to a flow rate differential. Also provided by this invention is a process for minimizing or eliminating the curtaining effect in the melt-lamination of thermoplastic materials.

REFERENCES:
patent: 3584341 (1971-06-01), Fairbanks
patent: 3694119 (1972-09-01), Scheibling
patent: 3792945 (1974-02-01), Randall
patent: 3877857 (1975-04-01), Melead
patent: 4152387 (1979-05-01), Cloeren
patent: 4197069 (1980-04-01), Cloeren
patent: 4344907 (1982-08-01), Herrington

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