Mold for blow molding, method for manufacturing resin container using same, and resin container
AssigneeNissei Asb Machine Co., Ltd.
InventorMasayuki USAMI
Life of this patent
Estimating the term…
Abstract
A blow molding mold in which a holding mechanism is independently provided to a bottom mold and is configured to be capable of gripping a protruding portion provided to a bottom portion of a preform independently of a gate portion, and a rotation mechanism is configured to be capable of rotating the bottom mold, relative to a neck portion of the preform which is in a stationary state held by neck molds, in a state where the protruding portion is gripped by the holding mechanism.
Claims7
A blow molding mold comprising:
- a bottom mold;
- a neck mold;
- a holding mechanism;
- and
- a rotation mechanism,
- wherein the holding mechanism is independently provided to the bottom mold and is configured to be capable of gripping a protruding portion provided to a bottom portion of a preform independently of a gate portion, and
- wherein the rotation mechanism is configured to be capable of rotating the bottom mold, relative to a neck portion of the preform which is in a stationary state held by the neck mold, in a state where the protruding portion is gripped by the holding mechanism.
A blow molding method comprising:
- gripping a protruding portion, which is provided to a bottom portion of a preform accommodated in a blow molding mold independently of a gate portion, by a holding mechanism independently provided to a bottom mold of the blow molding mold, in a state where split molds of the blow molding mold are opened;
- bending the preform by rotating the bottom mold which is gripping the protruding portion relative to a neck portion of the preform which is in a stationary state held by a neck mold;
- and
- closing the split molds and stretching the preform by a pressurizing medium.
A container made of resin, the container comprising:
- a neck portion having an opening;
- a body portion continuous to the neck portion and defining a sidewall part;
- and
- a bottom portion continuous to the body portion,
- wherein an inclination angle between an axis passing through a center of the opening and orthogonal to an opening surface formed by the opening and an axis extending in a vertical direction of the container is equal to or larger than 50° and equal to or smaller than 80°, and
- wherein when a direction extending in a horizontal diametrical direction of the opening is referred to as a width direction of the container and a horizontal direction orthogonal to the width direction is referred to as a depth direction of the container, a length in the width direction and a length in the depth direction of a horizontal section of the body portion are different from each other.
The container according to claim ,
- wherein the body portion includes an upper body portion having an inclined surface portion inclined along a direction orthogonal to an axis orthogonal to the opening surface formed by the opening and a lower body portion connected to the upper body portion and extending in the vertical direction,
- wherein horizontal sections of the upper body portion and the lower body portion have polygonal shapes, and
- wherein a number of corners of the polygonal shape of the horizontal section of the upper body portion is smaller than a number of corners of the polygonal shape of the horizontal section of the lower body portion.
Dependencies are inferred from the claim text.