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US 9,701,076 B2Granted
Multilayered container, die for multilayered container, and method for producing multilayered container
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorJun Mitadera
Life of this patent
Estimating the term…
Abstract
The present invention relates to a mold for a multi-layer container. The mold includes a cold-half portion containing a cavity, and a hot-half portion containing a first resin flow path for connecting an interior of a first injection cylinder to the cavity, a second resin flow path for connecting an interior of a second injection cylinder to the cavity, and a junction portion of the first resin flow path and the second resin flow path. The junction portion in the hot-half portion is positioned upstream of a gate portion opened to the cavity included in the cold-half portion, the second resin flow path contains an inhibitor for partially inhibiting a resin flow.
Claims15
A mold for a multi-layer container, the mold comprising:
- a cold-half portion (I) comprising a cavity;
- and
- a hot-half portion (II) comprising a first resin flow path for connecting an interior of a first injection cylinder to the cavity, a second resin flow path for connecting an interior of a second injection cylinder to the cavity, and a junction portion of the first resin flow path and the second resin flow path,
- wherein:
- the junction portion in the hot-half portion (II) is positioned upstream of a gate portion opened to the cavity included in the cold-half portion (I);
- the second resin flow path comprises an inhibitor for partially inhibiting a resin flow and a pin situated entirely upstream of the inhibitor, such that the partially inhibiting of the resin flow by the inhibitor does not block the center of the second resin flow path;
- the inhibitor comprises a convex portion in at least one part in the second resin flow path;
- and
- the convex portion comprises a longest portion in a diameter direction and a longest portion in a circumferential tangential direction of a cross-section in a direction vertical to a flow direction of the second resin flow path, such that the longest portion in the diameter direction has a length of ‘a’ (mm), and the longest portion in the circumferential tangential direction has a length of ‘b’ (mm), in which a and b satisfy the following relationships
- 0.01r≦a≦1r (Expression 1), and
- 0.01r≦b≦1r (Expression 2),
- and where ‘r’ represents a radius (mm) of the second resin flow path.
9 more elements
A mold for a multi-layer container, the mold comprising:
- a cold-half portion (I) comprising a cavity;
- and
- a hot-half portion (II) comprising a first resin flow path for connecting an interior of a first injection cylinder to the cavity, a second resin flow path for connecting an interior of a second injection cylinder to the cavity, and a junction portion of the first resin flow path and the second resin flow path,
- wherein:
- the junction portion in the hot-half portion (II) is positioned upstream of a gate portion opened to the cavity included in the cold-half portion (I);
- the second resin flow path comprises an inhibitor for partially inhibiting a resin flow and a pin situated entirely upstream of the inhibitor, such that the partially inhibiting of the resin flow by the inhibitor does not block the center of the second resin flow path;
- and
- the inhibitor comprises a convex portion in at least one site in the second resin flow path.
5 more elements
A mold for a multi-layer container, the mold comprising:
- a cold-half portion (I) comprising a cavity;
- and
- a hot-half portion (II) comprising a first resin flow path for connecting an interior of a first injection cylinder to the cavity, a second resin flow path for connecting an interior of a second injection cylinder to the cavity, and a junction portion of the first resin flow path and the second resin flow path,
- wherein:
- the junction portion in the hot-half portion (II) is positioned upstream of a gate portion opened to the cavity included in the cold-half portion (I);
- a section of the hot-half portion (II) above the junction portion is configured such that the first resin flow path is provided in a center of the second resin flow path, and the section further comprises an inhibitor for partially inhibiting a resin flow;
- the inhibitor is situated in a circumferential portion of the first resin flow path provided in the center of the second resin flow path, and the inhibitor comprises a convex portion in at least one part in the second resin flow path;
- and
- the convex portion comprises a longest portion in a diameter direction and a longest portion in a circumferential tangential direction of a cross-section in a direction vertical to a flow direction of the second resin flow path, such that the longest portion in the diameter direction has a length of ‘a’ (mm), and the longest portion in the circumferential tangential direction has a length of ‘b’ (mm), in which a and b satisfy the following relationships
- 0.01r≦a≦1r (Expression 1), and
- 0.01r≦b≦1r (Expression 2),
- and where ‘r’ represents a radius (mm) of the second resin flow path.
9 more elements
Dependencies are inferred from the claim text.