Manufacturing method and manufacturing apparatus for delamination container
AssigneeNissei Asb Machine Co., Ltd.
InventorsToshiteru Oike, Yoichi Tsuchiya, Daizaburo Takehana
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Abstract
In a manufacturing method for a delamination method, in a second injection molding including forming a second layer on an inner peripheral side of a first layer of a preform having a bottomed cylindrical shape, a second resin material is guided from an opening portion formed in the first layer toward the inner peripheral side of the first layer, and a locking portion protruding from the opening portion toward an outer peripheral side of the first layer is integrally formed with the second layer.
Claims7
A manufacturing method for a delamination container, the manufacturing method comprising:
- injection-molding a first layer of a preform having a bottomed cylindrical shape from a first resin material as a first injection molding;
- injecting a second resin material different from the first resin material to form a second layer on an inner peripheral side of the first layer as a second injection molding;
- and
- blow-molding, in a state of having residual heat from injection molding, the preform obtained during the second injection molding, to manufacture the delamination container,
- wherein, during the first injection molding, a thin film portion is formed in part of the first layer by depressing the first layer from the outer surface of the first layer to the side of the second layer, and a thickness of the thin film portion is less than a thickness of the remaining portion of the first layer,
- wherein, during the second injection molding, the thin film portion is broken by injection of the second resin material to form an opening portion, the second resin material is guided from the opening portion formed in the first layer toward the inner peripheral side of the first layer, and a locking portion protruding from the opening portion toward an outer peripheral side of the first layer is integrally formed with the second layer.
A manufacturing apparatus for a delamination container, the manufacturing apparatus comprising:
- a first injection molding unit configured to injection-mold a first layer of a preform having a bottomed cylindrical shape from a first resin material;
- a second injection molding unit configured to inject a second resin material different from the first resin material to form a second layer on an inner peripheral side of the first layer;
- and
- a blow molding unit configured to blow-mold, in a state of having residual heat from injection molding, the preform obtained by the second injection molding unit, to manufacture the delamination container,
- wherein the first injection molding unit forms a thin film portion in part of the first layer by depressing the first layer from the outer surface of the first layer to the side of the second layer, and a thickness of the thin film portion is less than a thickness of the remaining portion of the first layer,
- wherein the second injection molding unit breaks the thin film portion by injection of the second resin material to form an opening portion, guides the second resin material from the opening portion formed in the first layer toward the inner peripheral side of the first layer, and integrally forms a locking portion protruding from the opening portion toward an outer peripheral side of the first layer with the second layer.
Dependencies are inferred from the claim text.