Extrusion die for multilayer foils or plates of thermoplastic sy

Details Extrusion die for multilayer foils or plates of thermoplastic sy Extrusion die for multilayer foils or plates of thermoplastic sy

1988-10-14

1989-11-14

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

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

Extrusion shaping means

15624411, 156500, 425462, B29C 4706

Patent

active

048803707

ABSTRACT:
An extrusion die for the extrusion of a multilayer thermoplastic foil or plate in which a stack of die plates is provided and each plate has an inlet fitting on a respective side of the rectangular outline of the die connected to a respective extruder and a broadening channel opening at an outlet along another edge of the respective plate. The outlets are located on the same side of the stack and open into a common die lip from which the multilayer extrusion emerges at an elongated slit for the broad-mouth die. The broadening channels of the upper and lower plates are sickle shaped and extend inwardly from the respective inlets mirror-symmetrically to receive a median plane along which the inlet of the broadening channel of the central plate is provided.

REFERENCES:
patent: 2761417 (1956-09-01), Russell et al.
patent: 3005440 (1961-10-01), Padday
patent: 3547682 (1970-12-01), Erb
patent: 3559239 (1971-02-01), Work et al.
patent: 3583032 (1971-06-01), Stafford
patent: 3884606 (1975-05-01), Schrenk
patent: 4094947 (1978-06-01), Alfrey, Jr. et al.
patent: 4137027 (1979-01-01), Ruger
patent: 4329133 (1982-05-01), Gallizia
patent: 4669965 (1987-06-01), Murakami

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