Die unit, blow molding device, and blow molding method
AssigneeNissei Asb Machine Co., Ltd.
InventorsDaizaburo Takehana, Toshiteru Oike
Life of this patent
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Abstract
There is provided a mold unit for cooling a preform that has been injection-molded, the preform having a bottomed shape and made of a resin, the mold unit including a core mold having an outer shape corresponding to an inner shape of the preform, and being insertable into the preform, in which a flow path for a temperature adjustment medium extending in an axial direction of the core mold is formed inside the core mold, the flow path is formed at a position displaced in a circumferential direction of the core mold, and a position of the flow path is adjustable in the circumferential direction.
Claims8
A mold unit for cooling a preform that has been injection-molded, the preform having a bottomed shape and made of a resin, the mold unit comprising
- a core mold having an outer shape corresponding to an inner shape of the preform, and being insertable into the preform, wherein
- an exhaust port is disposed at a tip end portion of the core mold facing a bottom portion of the preform, the exhaust port being configured to discharge air from an inside of the preform through an inside of the core mold,
- a plurality of flow paths for a temperature adjustment medium extending in an axial direction of the core mold are formed inside the core mold, and
- the flow paths for the temperature adjustment medium are arranged in parallel with each other along a circumferential direction of the core mold.
A blow molding apparatus comprising:
- an injection molding unit configured to injection-mold a preform having a bottomed shape and made of a resin;
- a temperature adjusting unit including
- a mold unit for cooling a preform that has been injection-molded, the mold unit comprising
- a core mold having an outer shape corresponding to an inner shape of the preform, and being insertable into the preform, wherein
- a flow path for a temperature adjustment medium extending in an axial direction of the core mold is formed inside the core mold,
- the flow path is formed at a position displaced in a circumferential direction of the core mold, and
- a position of the flow path is adjustable in the circumferential direction;
- and configured to adjust a temperature of the preform that has been manufactured by the injection molding unit;
- and
- a blow molding unit configured to blow-mold the preform, the temperature of which has been adjusted, to manufacture a container made of the resin.
A blow molding method comprising:
- injection-molding a preform having a bottomed shape and made of a resin;
- adjusting a temperature of the preform that has been manufactured in the injection molding using a mold unit comprising
- a core mold having an outer shape corresponding to an inner shape of the preform, and being insertable into the preform, wherein
- a flow path for a temperature adjustment medium extending in an axial direction of the core mold is formed inside the core mold,
- the flow path is formed at a position displaced in a circumferential direction of the core mold, and
- a position of the flow path is adjustable in the circumferential direction;
- and
- blow-molding the preform, the temperature of which has been adjusted, to manufacture a container made of the resin, wherein
- in the injection molding, after injection of the resin material completes, a time for cooling a resin material in a mold space is equal to or less than ½ a time for injecting the resin material into the mold space.
Dependencies are inferred from the claim text.