Marbleization of plastic materials

Details Marbleization of plastic materials Marbleization of plastic materials

1978-10-31

1981-09-15

Pavelko, Thomas P.

Agitating

Rubber or heavy plastic working

With specified feed means

26432818, 425130, 366 78, 366 89, B29F 112

Patent

active

042894085

ABSTRACT:
Methods and apparatus for marbleizing molded parts produced by screw extruder machines. Liquid colorant is advantageously injected at a comparatively high pressure into a melt containing portion of the machine between the screw and its housing, where the melt is either completely molten or more than fifty percent molten.

REFERENCES:
patent: 3461498 (1969-08-01), Ramaika
patent: 3583679 (1971-06-01), Godley
patent: 3894823 (1975-07-01), Hanning
patent: 4017225 (1977-04-01), Hanning
patent: 4135870 (1979-01-01), Wallace
patent: 4183673 (1980-01-01), Easley

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