Patent ID: 11931947
Assignee: NISSEI ASB MACHINE CO., LTD.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. 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,

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, and
wherein a center line average roughness Ra1 of a portion of the surface of the body portion defining portion of the injection core mold, in which the groove is formed, in a circumferential direction is 0.2 μm or more and 15 μm or less.