Die for use in fine press working

Details Die for use in fine press working Die for use in fine press working

1992-01-15

1993-01-12

Yost, Frank T.

Cutting

Means to drive or to guide tool

With simple rectilinear reciprocating motion only

83686, 83687, 83690, B26F 114

Patent

active

051780500

ABSTRACT:
The object of the invention is to reduce the number of the producing processes of an IC lead frame.
In the present invention, a plurality of punches 17 are provided protruding from the base 16 in such a manner that their surfaces are disposed approximately radially, and the reinforcing punch 23 which connects the cutting blades 18 of the punches 17 with each other, is provided between the cutting blades 18, and protruding from the base 16.
The punches 17 are integrated by the reinforcing punch 23, so that the strength of each punch 17 is improved and the number of punched holes in one process can be increased.

REFERENCES:
patent: 3797342 (1974-03-01), Sekel
patent: 4085639 (1978-04-01), Marconi
patent: 4791844 (1988-12-01), Yonezawa
patent: 4819316 (1989-04-01), Rossini et al.

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