Manufacturing method for thermoplastics

Details Manufacturing method for thermoplastics Manufacturing method for thermoplastics

1975-05-07

1976-09-14

Whitby, Edward G.

Winding, tensioning, or guiding

Bobbin or spool

Double-headed spool

29207, 29DIG48, 156 735, 156306, 228 2, 264 68, B65H 7514

Patent

active

039802485

ABSTRACT:
The present invention relates to a method for manufacturing component thermoplastic sections and for joining them into bobbins for spinning and twisting machines. A frictional surface is formed by injection molding at the outer end surface of a male section and the inner end surface of a female section of a bobbin. By joining the sections and subjecting them to a high-speed rotation relative to each other the frictional surfaces melt and the sections are fused into an integral break resistant bobbin. The specific shapes of the male and female contacting surfaces and the manner of fusing them together are described as being critical.

REFERENCES:
patent: 3501110 (1970-03-01), Hopgood et al.
patent: 3562078 (1971-02-01), Zumstein
patent: 3720993 (1973-03-01), Farmer et al.
patent: 3749298 (1973-07-01), Hasoi
patent: 3780422 (1973-12-01), Herman

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