Method of making sheet metal threaded article

Details Method of making sheet metal threaded article Method of making sheet metal threaded article

1982-09-20

1984-01-03

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72356, 72370, B21D 2200

Patent

active

044236166

ABSTRACT:
A thin sheet of metal is drawn in progressive steps to form a hollow body having a closed end tubular portion integrally connected to an outwardly projecting cup-shaped flange portion. A section of the tubular portion is crimped inwardly against a threaded mandrel to form helical threads and diametrically opposed and outwardly projecting double wall rib portions. The mandrel is unthreaded to form a sheet metal insert which is adapted to be supported within a mold cavity by a cylindrical support pin during injection of a plastics material into the cavity and around the insert. The threads and rib portions positively secure the sheet metal insert within the molded plastics article or part for receiving a threaded fastener. The insert may also be used in a metal part or casting or in a wood article, wherever threads are required or desirable.

REFERENCES:
patent: 2980993 (1961-04-01), Lyon
patent: 2999312 (1961-09-01), Schilberg
patent: 3503246 (1970-03-01), Shiokawa
patent: 3719985 (1973-03-01), Federspill
patent: 4343174 (1982-08-01), Hahn

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