Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Including shaping means comprising fluid pressure contacting...
Patent
1989-02-21
1990-07-17
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Including shaping means comprising fluid pressure contacting...
425394, 425403, B29C 5110
Patent
active
049418149
ABSTRACT:
Vacuum forming apparatus in which a thermoplastic sheet material is pushed, by at least one plug, into a recess formed in a female mold, and evacuation is applied to the recess to bring the sheet material into intimate contact with a wall surface of the recess. At least one of the female mold and the plug is moved in a first direction in which the plug and a bottom of the recess relatively move toward each other. At least one of the female mold and the plug is moved in a second direction substantially perpendicular to the first direction, in which second direction the plug and a peripheral edge of the recess relatively move toward each other.
REFERENCES:
patent: 4480979 (1984-11-01), Keith et al.
Plastic Processing Technical Handbook, Kenji Okubo, 7-10-84, pp. 435-443.
Araki Kazui
Fukushima Hisao
Kobayashi Yoshio
Matsumoto Seiji
Heitbrink Timothy W.
Shigeru Kogyo Kabushiki Kaisha
Woo Jay H.
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