Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Differential temperature conditioning
Patent
1985-06-28
1987-10-20
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Differential temperature conditioning
264159, 264163, 264296, 264322, 264521, 264571, 4253021, 4253051, B29B 1302, B29C 5110, B29C 5710
Patent
active
047012951
ABSTRACT:
A method of forming bottomed cylindrical bodies, which can be used conveniently as preforms for the production of containers by stretch blow-molding, etc., from a cylindrical body of thermoplastic resin. The method includes a softening step of heat-softening an axially intermediate part of the cylindrical body, a necking step of necking the axially intermediate part of the cylindrical body radially inwardly, said necking step being carried out subsequently to, or simultaneously with, the softening step, a cutting step of cutting the axially intermediate part of the cylindrical body necked radially inwardly in the necking step, thereby to divide the cylindrical body into two members, and a fusing step of heat-melting the cut end portion of each of the two members and fusing the cut end portion.
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Kato Nobuyuki
Kobayashi Akira
Lorin Hubert C.
Silbaugh Jan H.
Toyo Seikan Kaisha Ltd.
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