Preform, method for producing resin container, and device for producing resin container

A method for producing a resin container including a container head portion, a container body portion, and a container bottom portion, the method comprising:

• an injection molding step of injecting a molten resin into an injection cavity formed by an injection molding mold to form a first preform;
• a temperature adjustment step of adjusting a temperature of a second preform to a temperature suitable for blow molding while the first preform is deformed into the second preform;
• and
• a blow molding step of blow-molding the second preform to produce a resin container,
• wherein
• the temperature adjustment step includes forming the second preform by stretching the first preform and bringing the first preform into contact with an inner wall surface of a temperature adjustment cavity formed by a temperature adjustment mold,
• the first preform includes an annular neck portion that forms the container head portion, and a body portion that forms the container body portion and the container bottom portion, and an angle formed by a central axis of the annular neck portion and the body portion ranges from 80° to 100°.

An apparatus for producing a resin container including a container head portion, a container body portion, and a container bottom portion, the apparatus comprising:

• an injection molding section including an injection molding mold that forms an injection cavity for producing a first preform;
• a temperature adjustment section including a deformation section that deforms the first preform into a second preform and a temperature adjustment mold that forms a temperature adjustment cavity;
• and
• a blow molding section including a blow molding mold that defines a shape of the resin container produced by blow-molding the second preform,
• wherein
• an inner wall surface of the temperature adjustment cavity is configured to cool the first preform by coming into contact with the first preform and define a shape of the second preform,
• an inner wall surface of the injection cavity defines, for the first preform, an annular neck portion that forms the container head portion and a body portion that forms the container body portion and the container bottom portion, and an angle formed by a central axis of the annular neck portion and the body portion ranges from 80° to 100°.