METHOD AND APPARATUS FOR MANUFACTURING RESIN CONTAINER

Title:

METHOD AND APPARATUS FOR MANUFACTURING RESIN CONTAINER

Document Type and Number:

WIPO Patent Application WO/2022/118840

Kind Code:

A1

Abstract:

This resin container manufacturing method comprises: an injection molding step for forming, by injection molding, a bottomed, cylindrical resin preform having different strength distributions in the circumferential direction thereof; and a blow molding step for producing a container by subjecting the preform to blow molding in a state in which potential heat at the time of injection molding is kept in the preform. In the injection molding step, by using an injection mold which has a partially projecting part formed in the circumferential direction of the bottom part thereof and further by changing the flow velocity and/or temperature of the resin passing the projecting part, a region that has a higher strength than the rest of the circumferential portion of the preform and that begins at a position corresponding to the projecting part is formed in the preform.

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Inventors:

OIKE TOSHITERU (JP)
TSUCHIYA YOICHI (JP)
OZAKI YASUO (JP)

Application Number:

PCT/JP2021/043880

Publication Date:

June 09, 2022

Filing Date:

November 30, 2021

Export Citation:

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Assignee:

NISSEI ASB MACHINE CO LTD (JP)

International Classes:

B29C45/16; B29C33/42; B29C45/37; B29C49/06; B29C49/22

Foreign References:

JPH10338220A	1998-12-22
JP2007326586A	2007-12-20
JP2019142186A	2019-08-29
JP3255485B2	2002-02-12
JP4588200B2	2010-11-24