Method for extruding a cross-linked material

Details Method for extruding a cross-linked material Method for extruding a cross-linked material

1979-02-01

1980-11-18

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Layered, stratified traversely of length, or multiphase...

264211, 264236, 425 97, 425197, 425376R, B29F 310

Patent

active

042345316

ABSTRACT:
A method of extruding a cross-linked material, more particularly an insulating cross-linked material around an electrical cable. In an extrusion machine comprising a housing terminated with an extrusion head and provided with a filtering means adjacent the outlet end of said housing, the cross-linkable product is fed without addition of a cross-linking agent, said cross-linking agent being first introduced in said cross-linkable material downstream said filtering means. The cross-linkable material is kept in the housing at an elevated temperature to be in a fluid state, the cross-linking agent being introduced at a temperature slightly lower than its reaction temperature, whereby the extrudate may be at a temperature near the maximum temperature admissible for the extrusion of said material.

REFERENCES:
patent: 2393452 (1946-01-01), Barley et al.
patent: 2443289 (1948-06-01), Barley
patent: 2539128 (1951-01-01), Gray
patent: 2911676 (1959-11-01), Henning
patent: 3275731 (1966-09-01), Kosinsky
patent: 3800019 (1974-03-01), Parseg et al.
patent: 3930782 (1976-01-01), Bigland
patent: 4091064 (1978-05-01), Kakinama et al.
patent: 4136132 (1979-01-01), Poole
patent: 4155690 (1979-05-01), Checkland et al.

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