Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including application of internal fluid pressure to hollow...
Patent
1995-12-29
1998-05-19
Timm, Catherine
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Including application of internal fluid pressure to hollow...
264905, B29C 4918
Patent
active
057531757
ABSTRACT:
A method of easily molding a heat-resistant container which has a heat-resistant bottom portion, including a steps of primary blow-molding for molding a preform into a primary molded article, a step of heat treatment for the primary molded article, and a step of final blow-molding for molding the primary molded article which has been subjected the heat treatment into a final container, and a mold used for the method. In the step of primary blow-molding a raised-bottom portion is formed in the primary molded article using a raised-bottom mold, and this raised-bottom portion is of substantially the same shape as a raised-bottom portion of the final container. The preform has sufficient heat for a complicated mold, which thereby allows a raised-bottom portion of some complication and with adequate heat-resistance to be formed without difficulty. The shape of the raised-bottom portion of the primary molded article is maintained, and using another raised-bottom molds, heat treatment and final blow-molding are carried out.
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Kitamura Kazuya
Sato Koichi
Tuchiya Yoichi
Yokobayashi Kazuyuki
Nissei ASB Machine Co. Ltd.
Timm Catherine
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