Plastic article or earthenware shaping or treating: apparatus – Mold opening and closing means and segmented female mold
Patent
1988-12-05
1990-05-08
Yost, Frank T.
Plastic article or earthenware shaping or treating: apparatus
Mold opening and closing means and segmented female mold
100282, 100292, 100257, 83530, 83527, 83632, 83626, 83283, 72450, B28B 300, B29C 3320
Patent
active
049233866
ABSTRACT:
A lead forming apparatus suitable for use in forming the leads of a semiconductor device is disclosed. The apparatus has a housing for supporting a stationary lower mold half, a support plate arranged to freely move with respect to the housing for supporting a movable mold half in opposition to the lower mold half, a moving device for moving the support plate to cause the movable mold half toward and away from the lower mold half, and an adjusting device for adjusting the position of the support plate with respect to the moving device. The moving device has a crankshaft, a driving device for rotating the crankshaft about its axis, and a coupler transmitting the rotation of the crankshaft to the support plate as a linear motion. The apparatus having the above-described arrangement can be operated with a reduced noise level and a reduced impact and, furthermore, achieves good operability.
REFERENCES:
patent: 2869453 (1959-01-01), Horn
patent: 4480538 (1984-11-01), Yoshida
patent: 4677908 (1987-07-01), Imanishi et al.
"Press Manufacturing Handbook", by the Japan Plastic Manufacturing Association, published by Maruzen Ltd., pp. 772-775.
Eshima Taizo
Kai Yasuyoshi
Mitsubishi Denki & Kabushiki Kaisha
Payer Hwei-Siu
Yost Frank T.
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