Plastic extrusion

Details Plastic extrusion Plastic extrusion

1978-08-01

1980-12-09

Derrington, James H.

Plastic and nonmetallic article shaping or treating: processes

Random variegated coloring during molding

By extrusion

264167, 264178R, 264209, 264557, 264560, 264562, B29F 300

Patent

active

042384354

ABSTRACT:
A method of making elongated members of thermoplastic material which simulate natural bamboo by continuously extruding the material through a die, cooling the extruded material downstream of the die, gripping the cool material and transporting the material away from the die and slowing the speed of transport relative to the speed of extrusion at predetermined lengths of extrusion to produce regions of greater external cross-sectional dimensions to provide axially spaced nodes similar to those of bamboo.

REFERENCES:
patent: 3399262 (1968-08-01), Quackenbush et al.
patent: 3812230 (1974-05-01), Takahashi
patent: 4110062 (1978-08-01), Summers

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