Title:
RESIN CONTAINER MANUFACTURING METHOD AND MANUFACTURING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2022/059695
Kind Code:
A1
Abstract:
This resin container manufacturing method comprises: a first injection molding step in which a bottomed cylindrical intermediate molded body made of resin is injection molded; a second injection molding step in which a resin material is injection molded on the outside of the intermediate molded body to manufacture a multilayer preform in which a resin layer is layered on the outer circumferential side of the intermediate molded body; and a blow molding step in which the preform is blow molded in a state of including residual heat from the time of injection molding, and a resin container having a wall thickness which is thicker in the bottom section than in the trunk section is manufactured. A tapered region at which the wall thickness increases towards the bottom section is formed at location facing the bottom section of the inner circumferential side of the intermediate molded body.
Inventors:
TSUCHIYA YOICHI (JP)
ISHIZAKA KAZUYA (JP)
ISHIZAKA KAZUYA (JP)
Application Number:
PCT/JP2021/033866
Publication Date:
March 24, 2022
Filing Date:
September 15, 2021
Export Citation:
Assignee:
NISSEI ASB MACHINE CO LTD (JP)
International Classes:
B29C45/16; B29C49/06; B29C49/22
Foreign References:
| JPS61258751A | 1986-11-17 | |||
| JP2010503565A | 2010-02-04 | |||
| JPH06230173A | 1994-08-19 |
Attorney, Agent or Firm:
TAKAOKA Ryoichi et al. (JP)
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