Moulding tool and method of making same

Details Moulding tool and method of making same Moulding tool and method of making same

1990-10-29

1991-05-28

Crane, Daniel C.

Metal deforming

Tool and/or tool holder

Tool comprising closed periphery deforming passageway

761071, 249135, B21C 302

Patent

active

050191144

ABSTRACT:
The moulding tool has an annular die providing a moulding cavity, an inner ring abutting against the die outer peripheral surface and an outer ring abutting against the inner ring outer peripheral surface. The inner ring is made of a material having a higher modulus of elasticity than the material from which the outer ring and die are made. Advantageously the inner ring is made of a carbide metal and the die and outer ring of steel and in the above described relationship to reduce the danger of fracture of the die.

REFERENCES:
patent: 1108643 (1914-08-01), Wall
patent: 2147350 (1939-02-01), Pohl
patent: 2568440 (1951-09-01), Friedman
patent: 3608351 (1971-09-01), Strandell
patent: 3691816 (1972-09-01), Strandell
patent: 3810382 (1974-05-01), Strandell
patent: 3848453 (1974-11-01), Hardt
patent: 4228673 (1980-10-01), Scheel
patent: 4287749 (1981-09-01), Bachrach

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