Forming mold and injection mold

Patent metadata

Field	Value
Publication number	US-10737428-B2
Application number	US-201816235271-A
Country	US
Kind code	B2
Filing date	Dec 28, 2018
Priority date	Jun 20, 2014
Publication date	Aug 11, 2020
Grant date	Aug 11, 2020

Abstract

A forming mold is used when forming a preform, which has a neck portion and a barrel portion, and whose barrel portion is filled with a molding material over the entire axial direction thereof, by injection molding; forming a space part in the barrel portion of the preform to convert the preform into an intermediate molded product; and blow-molding the intermediate molded product to form a hollow container which is a final molded product. The forming mold is equipped with a boring rod which is inserted from the neck portion side into the barrel portion of the preform to form the space part of at least a predetermined depth in the barrel portion.

First claim

The invention claimed is:

1. A forming mold for use in forming a preform, which has a neck portion and a barrel portion, and whose barrel portion is filled with a molding material over an entire axial direction thereof, by injection molding; forming a space part in the barrel portion of the preform to convert the preform into an intermediate molded product; and blow-molding the intermediate molded product to form a hollow container which is a final molded product,
wherein the forming mold is equipped with a boring rod which is inserted from a side of the neck portion into the barrel portion of the preform to form the space part of at least a predetermined depth in the barrel portion,
wherein the boring rod includes a cylinder first member and a rod-shaped second member inserted into the first member, and
wherein the second member is longer than the first member.

2. The forming mold according to claim 1 , wherein the boring rod is configured to be capable of jetting air from at least a leading end thereof into the barrel portion of the preform.

3. The forming mold according to claim 2 , wherein the boring rod has at the leading end thereof a ring-shaped opening for jetting air.

4. An injection mold for use in forming a preform, which has a neck portion and a barrel portion, whose barrel portion is filled with a molding material over an entire axial direction thereof, and whose neck portion has a reference hole, by injection molding; inserting a boring rod from the reference hole to form a space part in the barrel portion of the preform, thereby converting the preform into an intermediate molded product; and blow-molding the intermediate molded product to form a hollow container which is a final molded product,
wherein the injection mold is equipped with a neck mold for defining an outer peripheral surface of the neck portion, and one injection core mold disposed inside the neck mold for defining an inner peripheral surface of the neck portion,
wherein the neck mold includes a pair of split molds which are openable and closable,
wherein the one injection core mold is disposed between the pair of split molds, and
wherein the one injection core mold includes:
a base part which is in contact with both of the pair of split molds; and
one protruding part which extends downward from the base part and is not in contact with the pair of split molds.

5. The injection mold according to claim 4 , wherein the injection core mold is formed in a length sufficient to reach the barrel portion.

Assignees

• Nissei Asb Machine Co Ltd

Inventors

• Miyazawa Yoshiki
• Tsuchiya Yoichi

Classifications

• B29C2949/0715

  the preform having one end closed · CPC title

• B29C49/18

  using several blowing steps (B29C49/16 takes precedence) · CPC title

• B29C49/0665

  the injection mould cavity and the blow-mould cavity being displaceable to the geometrically fixed injection core mould · CPC title

• B29C49/28

  Blow-moulding apparatus · CPC title

• B29C2949/3056

  having components being compression moulded · CPC title