Method of extruding fiber reinforced plural layered plastic tube

Details Method of extruding fiber reinforced plural layered plastic tube Method of extruding fiber reinforced plural layered plastic tube

1973-11-30

1976-01-20

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Orienting or aligning solid particles in fluent matrix material

264173, 264209, 264210, 264280, 264290, B29D 2304

Patent

active

039339602

ABSTRACT:
The specification discloses a method of making a reinforced tube comprising continuously extruding at least one viscous material having reinforcing fibres therein through two concentric sets of discrete passages, producing laminar flow in the passages by causing the material to accelerate on entry into the passages and preventing deceleration thereof within the passages whereby the fibres orientate themselves in the material lengthwise of the passages, and bringing together the extruded material from the respective passages so as to form two layers of material one within the other having fibres lying on helices of opposite hands respectively and simultaneously hauling-off the extruded layers at a regulated rate to control the angle of the helices on which the fibres lie, and allowing said layers to consolidate into a single tube.

REFERENCES:
patent: 2736921 (1956-03-01), Mulbarger et al.
patent: 2973783 (1961-03-01), Boe
patent: 3181201 (1965-05-01), Seiz
patent: 3281897 (1966-11-01), Mercer
patent: 3296661 (1967-01-01), Moustier
patent: 3375548 (1968-04-01), Kido et al.
patent: 3561493 (1971-02-01), Maillard
Perry et al., Chemical Engineer's Handbook, McGraw-Hill, N.Y., (1963), pp. 5-15, 5-16, 5-30, 5-31, 5-32.
Walker et al., Principles of Chemical Engineering, McGraw-Hill, N.Y., (1937) pp. 58-59.

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