Merchant & Gould, P.C.
Method of producing press-forming punch and die
An economical method of producing a press-forming die is disclosed wherein a master die and a master punch are relatively reciprocated with a full stroke and a shorter stroke to produce a press-formed panel and a half-pressed panel. After an elastic material is applied to one surface of the half-pressed panel, the press-formed panel is fitted over the master punch, and the half-pressed panel is forced against the press-formed panel with the elastic material facing away from the press-formed panel, whereby the half-pressed panel is shaped into a die panel complementary in contour to the shape of the press-formed panel. A back-up material such as high-strength cement is then applied to the rear surface of the die panel whereby a press-forming die is produced.
Honda Giken Kogyo Kabushiki Kaisha
B B
B21D B23P
inventional inventional
Teiji Yoshikazu Masafumi
Watanabe Nakamura Nakamura