Die restrictions to obtain smooth surfaces on foam extrudates

Details Die restrictions to obtain smooth surfaces on foam extrudates Die restrictions to obtain smooth surfaces on foam extrudates

1974-09-18

1976-08-24

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

Core, pin or insert member

425380, 425817C, B29F 304

Patent

active

039764192

ABSTRACT:
Apparatus and method for reducing interior surface roughness and improving interior surface gloss in extruded tubular articles made from foamed thermoplastic materials.

REFERENCES:
patent: 3074106 (1963-01-01), Eberman
patent: 3339235 (1967-09-01), Nossol
patent: 3391051 (1968-07-01), Ehrenfreund et al.
patent: 3410933 (1968-11-01), Moseley, Jr.
patent: 3502753 (1970-03-01), Rhoads
patent: 3810965 (1974-05-01), Sen et al.

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