Apparatus for spinning of core/sheath fibers

Details Apparatus for spinning of core/sheath fibers Apparatus for spinning of core/sheath fibers

1992-04-14

1993-03-23

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

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

Extrusion shaping means

264171, 4251331, 425462, B29C 4704

Patent

active

051962110

ABSTRACT:
A pack for spinning core/sheath fibers from a plurality of fiber-forming materials including a distributor, a spinneret plate, and a separating plate therebetween. The distributor has a first conduit adapted to convey one of the first materials in a stream in a downstream direction, and a second conduit adapted to convey another material in a second stream in the same direction. The separating plate includes a core cavity, an annulus surrounding it, a sheath channel fluidly connecting the first conduit and the annulus, and a core channel fluidly connecting the second conduit and the cavity. The spinneret plate includes an exit channel with a die capillary at its downstream end fluidly connected to the annulus and the core cavity at its upstream end. The exit channel has an entry with diameter at least equal to the annular diameter, the entry being located at or adjacent the upstream end. As a result, the first stream surounds the second stream and both are extruded through the die capillary to form the fiber.

REFERENCES:
patent: 3692423 (1972-09-01), Okamoto et al.
patent: 3760052 (1973-09-01), Fukuma et al.
patent: 3849044 (1974-11-01), Ando et al.
patent: 4052146 (1977-10-01), Sternberg

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