Modular tubular extrusion head

Details Modular tubular extrusion head Modular tubular extrusion head

1990-09-20

1991-12-03

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

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

Extrusion shaping means

425192R, 425462, 264173, B29C 4706, B29C 4712

Patent

active

050696122

ABSTRACT:
A polymer resin extrusion head includes one or more coaxial annular extrusion modules each including a pair of mating annular members with central frustoconical portions having apexes with an axial dimension greater than the axial dimension of the outer portions of the modules so as to form air spaces around each module including frustoconical air space portions to avoid direct heat transfer between adjacent modules. A spiral channel having one or more convolutions extends from a resin inlet on the periphery of the module and gradually opens into a frustoconical transfer passage leading to an annular extrusion outlet on the inner edge of the module. The spiral channel evenly distributes resin from the inlet to the annular outlet.

REFERENCES:
patent: 3321803 (1967-05-01), Corbett
patent: 3649143 (1972-03-01), Papesh et al.
patent: 4111630 (1978-05-01), Shiomi et al.
patent: 4120633 (1978-10-01), Feuerherm
patent: 4182603 (1980-01-01), Knittel
patent: 4185954 (1980-01-01), Murakami et al.
patent: 4657497 (1987-04-01), Dehennan et al.
patent: 4798526 (1989-01-01), Briggs et al.
patent: 4832589 (1989-05-01), Gini et al.
patent: 4867664 (1989-09-01), Fukuhara

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