Plastic article or earthenware shaping or treating: apparatus – Segmented female mold and mold clamping means
Patent
1989-12-06
1991-06-25
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Segmented female mold and mold clamping means
249 82, 249167, 269240, 269285, 425541, B29C 3320
Patent
active
050262670
ABSTRACT:
The apparatus includes a pair of molds each having a peripheral flange provided with a mating surface. The molds are clamped by a suitable number of clamp assemblies for clamping the flanges of the molds so that the molds are secured together with the mating surfaces in contact with each other. The clamp assembly includes a pair of clamp members for engagement with the flanges of the molds, a shaft passing through the clamp members, a first stop member provided on the shaft for engagement with one of the clamp members, a spacer provided on the shaft for axial slidable movement and adapted for engagement with the other of the clamp members, a second stop member provided on the shaft for engagement with the spacer at an end opposite to the other of the clamp members. The shaft is made of a material having a coefficient of thermal expansion which is smaller than that of a material from which the spacer is made so that the spacer has a thermal expansion in the axial direction which is not smaller than a thermal expansion in the axial direction of the shaft under the same temperature increase.
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Text Book entitled "Practical Knowledge on Plastics, 4th Edition", published by Toyo Keizai Shinpo Sha, Tokyo, Japan, Dec. 26, 1985 by Mitsuo Fukii, Professor Keio University and Hiroshi Kakiuchi, Professor Yokohama National University.
Davis Robert B.
Japan Aircraft Development Corporation
Kawasaki Jukogyo Kabushiki Kaisha
Woo Jay H.
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