Apparatus for the preparation of foamed thermoplastic extruded p

Details Apparatus for the preparation of foamed thermoplastic extruded p Apparatus for the preparation of foamed thermoplastic extruded p

1973-10-09

1976-03-02

Shore, Ronald J.

Plastic article or earthenware shaping or treating: apparatus

Stock pressurizing means operably associated with downstream...

264 459, 425461, 425817C, B29D 702, B29D 2700, B29F 306

Patent

active

039415449

ABSTRACT:
An apparatus for the production of extruded profiles of foamed thermoplasts consisting of an extruder having an extrusion screw and a form-giving extruder head having a flow channel therethrough characterized in that at least part of the length of said flow channel is divided by separating walls having a thickness of 0.2 to 3 mm arranged in the axial direction into individual channels of such a length and cross-section area whereby each individual channel has a nozzle coefficient k of from 0.1 to 2 mm.sup.3 ; as well as the process of extrusion.

REFERENCES:
patent: 1397571 (1921-11-01), Bowen
patent: 2886850 (1959-05-01), Kubiliunas
patent: 3343214 (1967-09-01), Myers
patent: 3344473 (1967-10-01), Achterberg et al.
patent: 3427371 (1969-02-01), Skinner
patent: 3720572 (1973-03-01), Soda et al.
patent: 3834849 (1974-09-01), Supran et al.

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