Punch made of heterogenous composite elastic material

Details Punch made of heterogenous composite elastic material Punch made of heterogenous composite elastic material

1989-03-16

1992-04-28

Buffalow, Edith L.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428180, 4284231, B05D 312

Patent

active

051088169

ABSTRACT:
In the method for blanking out a sheet material (1) between a punch (4) and a die (6) having a sharp edge (7), the punch (4) is formed by a heterogeneous composite elastic material having localized regions (4a) having a relatively higher hardness, and complementary regions (4b) having a relatively lower hardness.

REFERENCES:
patent: 4615754 (1986-10-01), Waugh et al.
patent: 4803112 (1989-02-01), Kakimoto

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