Method of manufacturing bobbins for industrial use

Details Method of manufacturing bobbins for industrial use Method of manufacturing bobbins for industrial use

1984-06-08

1986-04-15

Silbaugh, Jan

Metal working

Method of mechanical manufacture

Assembling or joining

29510, 29516, 264156, 264251, 264254, 264263, 264273, 264274, 264278, B23P 1904, B29C 4500

Patent

active

045818061

ABSTRACT:
A method of manufacturing a bobbin in which a plastic flange is first insert molded to one end of a winding shaft of nonferrous metal alloy. A bushing of synthetic resin is the forced into a bore in the winding shaft at the other end thereof, and a core having a head is inserted into a bore in the bushing to close an open end of the bore in the bushing with the head of the core. The end of the winding shaft, an outer end of the bushing, and the head of the core are placed in a mold, and a synthetic resin material is injected through a sprue, a runner, and a gate in the mold into a cavity therein to mold a second flange on the end of the winding shaft therearound to obtain a bobbin having plastic flanges at both ends.

REFERENCES:
patent: 3256378 (1966-06-01), Hauf
patent: 3263520 (1966-08-01), Tschanz
patent: 3374538 (1968-03-01), Murray
patent: 3980248 (1976-09-01), Minoshima

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