Method of forming bottomed cylindrical bodies from a...

Details Method of forming bottomed cylindrical bodies from a... Method of forming bottomed cylindrical bodies from a...

B - Operations, Transporting

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18/937

B29C 65/72 (2006.01) B29C 49/02 (2006.01) B29C 49/22 (2006.01) B29C 57/10 (2006.01) B29C 67/00 (2006.01) B29C 69/00 (2006.01) B29D 22/00 (2006.01)

Patent

CA 1232726

ABSTRACT OF THE DISCLOSURE: 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.

486118

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