Method for producing resin container, injection core mold, mold for injection molding, and device for producing resin container
AssigneeNissei Asb Machine Co., Ltd.
InventorsYasuo OZAKI, Yoichi TSUCHIYA, Toshiteru OIKE
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Abstract
A method for manufacturing a resin container, the method including: injection-molding a bottomed preform made of resin; and blow-molding the preform to manufacture a resin container, in which the injection molding includes filling a cavity formed by at least an injection core mold and an injection cavity mold with a molten resin to form the preform, and a first groove that extends from a bottom portion defining portion to a neck portion defining portion is formed in a surface of the body portion defining portion of the injection core mold.
Claims16
A method for manufacturing a resin container, the method comprising:
- injection-molding a bottomed preform made of resin;
- and
- blow-molding the preform to manufacture a resin container,
- wherein the injection-molding includes filling a cavity formed by at least an injection core mold and an injection cavity mold with a molten resin to form the preform,
- wherein the injection core mold includes:
- a bottom portion defining portion configured to define a shape of a bottom portion of the preform;
- a body portion defining portion configured to define a shape of a body portion of the preform;
- and
- a neck portion defining portion configured to define a shape of a neck portion of the preform, and
- wherein a groove that extends from the bottom portion defining portion to the neck portion defining portion is formed in a surface of the body portion defining portion.
An injection core mold for injection-molding a bottomed preform made of resin, the injection core mold comprising:
- a bottom portion defining portion configured to define a shape of a bottom portion of the preform;
- a body portion defining portion configured to define a shape of a body portion of the preform;
- and
- a neck portion defining portion configured to define a shape of a neck portion of the preform,
- wherein a groove that extends from the bottom portion defining portion to the neck portion defining portion is formed in a surface of the body portion defining portion.
A method for manufacturing a resin container, the method comprising:
- injection-molding a bottomed preform made of resin;
- adjusting a temperature of the injection-molded preform while cooling the preform;
- and
- blow-molding the temperature-adjusted preform to manufacture a resin container,
- wherein the injection-molding includes filling a cavity formed by at least an injection core mold and an injection cavity mold with a molten resin to form the preform,
- wherein the injection core mold includes a body portion defining portion configured to define a shape of a body portion of the preform,
- wherein the temperature adjustment includes sandwiching the preform between a temperature adjustment cavity mold and a temperature adjustment core mold,
- wherein the temperature adjustment core mold includes a body portion contact portion in contact with the body portion of the preform during the sandwiching, and
- wherein a center line average roughness Ra1 of a surface of the body portion defining portion of the injection core mold in a circumferential direction is larger than a center line average roughness Ra2 of a surface of the body portion contact portion of the temperature adjustment core mold in a circumferential direction.
Dependencies are inferred from the claim text.