Apparatus for forming a co-extrusion from extruded strips

Details Apparatus for forming a co-extrusion from extruded strips Apparatus for forming a co-extrusion from extruded strips

1984-06-28

1985-07-02

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

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

Extrusion shaping means

264171, 425190, 425376B, B29D 702, B29F 304

Patent

active

045265283

ABSTRACT:
An apparatus (10) wherein extruded strips (98,116) of elastomeric material are fed separately over a cylindrical roller surface (20) at more than one angular position (126,128,130) relative to the roller (18) by a die head (12) to form predetermined cross-sectional areas of the co-extrusion (118). The channels (26,28,36,38) in the die head guide plate (32) connecting the extruders (14,16) and the orifices (30,40) at the roller surface (20) are provided by walls of a replaceable preformer insert (44) which are spaced from the walls of an opening (42) in the guide plate (32). Different sizes and configurations of the channels (26,28,36,38) can be obtained using different preformer inserts (44). The grooves (80,88,90,114,132,134,138,151,152,154) which guide the strips (98,116) of elastomeric material applied to the roller surface (20) are in replaceable finish dies (66,68) mounted in a slot (70) in the cylindrical surface (22) of the die head (12) so that the various laminations and configurations required can be obtained by inserting the desired finish dies (66,68). Different finish dies (66,68) have grooves (80,88,90,114,132,134,138,151,152,154) at different positions to provide the desired overlapping of the applied strips (98,116).

REFERENCES:
patent: 1603812 (1926-10-01), Stein
patent: 2382177 (1945-08-01), Schanz
patent: 2686335 (1954-08-01), Gross
patent: 2892212 (1959-06-01), Rhodes
patent: 3060512 (1962-10-01), Martin et al.
patent: 3142091 (1964-07-01), Curtiss
patent: 3871810 (1975-03-01), Geyer
patent: 3956056 (1976-05-01), Boguslawski et al.
patent: 4299789 (1981-11-01), Giesbrecht
patent: 4413973 (1983-11-01), Peters

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