Apparatus for extruding a marbleized synthetic-resin strand

Details Apparatus for extruding a marbleized synthetic-resin strand Apparatus for extruding a marbleized synthetic-resin strand

1991-02-19

1992-02-18

Thurlow, Jeffery

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

264 75, 264245, 264349, 425206, 425381, 425462, B29C 4712

Patent

active

050889095

ABSTRACT:
A marbleized thermplastic-resin strand is made from a matrix resin and an inlay resin in an apparatus having a die forming a passage extending along an axis and havng an upstream inlet end and a downstream outlet end and an extruder for injecting the matrix resin in hot liquefied condition into the passage at the upstream end thereof such that the resin emerges from the downstrea end. An inlay nozzle opens into the passage between its ends and extends through the die along a nozzle axis not parallel to the passage axis. The inlay resin is fed in hot liquefied condition through the nozzle into the passage such that the inlay resin mixes with the matrix resin. The inlay nozzle is rotated substantially continuously about its nozzle axis so long as the extruder is operating. Thus the patterning of the inlay resin in the matrix resin is a function of the rotation speed of the inlay nozzle.

REFERENCES:
patent: 2632204 (1953-03-01), Murray
patent: 3531828 (1970-10-01), Nauta
patent: 3664789 (1972-05-01), Gibney
patent: 3778207 (1973-12-01), Luraschi
patent: 3914362 (1975-10-01), Randall
patent: 4185951 (1980-01-01), Webermeier et al.
patent: 4834639 (1989-05-01), Eschbach et al.
patent: 4921414 (1990-05-01), Schliehe et al.

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