Marbleization of plastic materials

Details Marbleization of plastic materials Marbleization of plastic materials

1978-11-06

1981-01-27

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Random variegated coloring during molding

By compression in a closed mold cavity

264211, 2643282, 366 76, 425207, B29F 312

Patent

active

042475015

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: 3291883 (1966-12-01), Cornelius et al.
patent: 3461498 (1969-08-01), Ramaika
patent: 3664790 (1972-05-01), Hollander
patent: 3817675 (1974-06-01), Maiocco
patent: 3832431 (1974-08-01), Matthaei
patent: 4125582 (1978-11-01), Langlois

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