Liquid container manufacturing method
AssigneeYoshino Kogyosho Co., Ltd.
InventorsTamotsu Toyoda, Shigeki Morikami
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Abstract
A liquid container manufacturing method of manufacturing a liquid container that contains a content liquid from a synthetic resin preform, the method including an inflation body insertion step of inserting an inflation body into the preform; an air discharge step of discharging air out of the preform by inflating an inflation body in the preform; a mouth blocking step of blocking a mouth of the preform; an inflation body contraction step of contracting the inflation body with the mouth blocked; and a liquid blow molding step of molding the preform into a liquid container by supplying a pressurized liquid into the preform through a blow nozzle.
Claims9
A liquid container manufacturing method of manufacturing a liquid container that contains a content liquid from a synthetic resin preform, the method comprising:
- an inflation body insertion step of inserting an inflation body into the preform placed in a mold for blow molding;
- an air discharge step of discharging air out of the preform by inflating the inflation body with elastic deformation in the preform;
- a mouth blocking step of blocking a mouth of the preform with the inflation body inflated in the preform;
- an inflation body contraction step of contracting the inflation body with the mouth blocked;
- and
- a liquid blow molding step of molding the preform into a liquid container having a shape conforming to an inner surface of the mold for blow molding by supplying, after the inflation body contraction step, a pressurized liquid into the preform through a blow nozzle,
- wherein, in the inflation body contraction step, the inflation body is contracted without supplying liquid into the preform, and
- wherein, in the inflation body contraction step, the inflation body is contracted by elastic restoration force of the elastic deformation of the inflation body and a contraction of the inflation body causes a negative pressure in the preform.
Dependencies are inferred from the claim text.