Die for extruding thermoplastic sheets

Details Die for extruding thermoplastic sheets Die for extruding thermoplastic sheets

1975-01-02

1976-11-30

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Stock pressurizing means operably associated with downstream...

65183, 425461, 264176R, B29D 704, B29F 304

Patent

active

039946541

ABSTRACT:
The present invention relates to an improvement in a die for extruding thermoplastic sheet having a controlled degree of microsurface roughness. The improvement comprises having a beveled leading edge on at least one of the die lips wherein the bevel is away from the die orifice in order to control the degree of microsurface roughness in the extruded sheet.

REFERENCES:
patent: 1859416 (1932-05-01), Tanzi
patent: 2489951 (1949-11-01), Bump
patent: 2713313 (1955-07-01), Femina
patent: 3461496 (1969-08-01), Winstead

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