Method and an arrangement for the manufacture of a material web

Details Method and an arrangement for the manufacture of a material web Method and an arrangement for the manufacture of a material web

1979-08-08

1981-04-14

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264564, 4251331, 425817C, B29D 2700

Patent

active

042619394

ABSTRACT:
A method and apparatus are disclosed for the manufacture of a web of foamed thermoplastic material. The material web is extruded to form a tubular member and then expanded by action of a compressed fluid so that the outside of the tubular member is forced against a calibrating element arranged adjacent the tubular member. The tubular member is then cooled to a temperature below the softening temperature of the material and then is cut and converted into web form.

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patent: 4009976 (1977-03-01), Johnson
patent: 4049768 (1977-09-01), Luthra
patent: 4160638 (1979-07-01), Kolossow

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