Liquid blow molding method and liquid blow molding apparatus

Patent metadata

Field	Value
Publication number	US-10919208-B2
Application number	US-201615766240-A
Country	US
Kind code	B2
Filing date	Oct 17, 2016
Priority date	Nov 27, 2015
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

A bottomed tubular-shaped preform is molded into a liquid-containing container holding a content liquid, by supplying, through a first supply path, a first liquid at a predetermined pressure into the preform that has been heated to a predetermined temperature to liquid blow mold the preform and by supplying, through a second supply path that is different from the first supply path, a second liquid into the preform after or simultaneously with the supply of the first liquid.

First claim

The invention claimed is:

1. A liquid blow molding method for molding a bottomed tubular-shaped preform into a liquid-containing container in which a content liquid is held, the liquid blow molding method comprising:
a first supply step of supplying, through a first supply path, a first liquid at a predetermined pressure into the preform that has been heated to a predetermined temperature to liquid blow mold the preform;
a second supply step of supplying, through a second supply path that is different from the first supply path, a second liquid into the preform after or simultaneously with the supply of the first liquid, wherein:
the second liquid includes properties that prevent the first liquid and the second liquid from maintaining a uniform mixed state;
a suck-back step, performed after the preform is liquid blow molded into the container having a predetermined shape in the first supply step, of sucking out a predetermined amount of the first liquid from the container that has been molded in the predetermined shape in the first supply step; and
in the second supply step, the second liquid is supplied into the container from which the predetermined amount of the first liquid has been sucked out in the suck-back step.

2. The liquid blow molding method of claim 1 , wherein, in the second supply step, the supply of the second liquid is stopped before an internal pressure in the container reaches atmospheric pressure.

3. The liquid blow molding method of claim 1 , further comprising a circulation step, performed before the first supply step, of circulating the first liquid between a tank configured to hold the first liquid and the first supply path.

4. The liquid blow molding method of claim 2 , further comprising a circulation step, performed before the first supply step, of circulating the first liquid between a tank configured to hold the first liquid and the first supply path.

5. A liquid blow molding method for molding a bottomed tubular-shaped preform into a liquid-containing container in which a content liquid is held, the liquid blow molding method comprising:
a first supply step of supplying, through a first supply path, a first liquid at a predetermined pressure into the preform that has been heated to a predetermined temperature to liquid blow mold the preform;
a second supply step of supplying, through a second supply path that is different from the first supply path, a second liquid into the preform after or simultaneously with the supply of the first liquid, wherein:
the second liquid includes properties that prevent the first liquid and the second liquid from maintaining a uniform mixed; and

a circulation step, performed before the first supply step, of circulating the first liquid between a tank configured to hold the first liquid and the first supply path.

Assignees

• Okuyama Yuichi
• Shiokawa Mitsuru
• Yoshino Kogyosho Co Ltd

Inventors

• Okuyama Yuichi
• Shiokawa Mitsuru

Classifications

• B29C49/66

  Cooling by refrigerant introduced into the blown article · CPC title

• B29C49/28

  Blow-moulding apparatus · CPC title

• B29C49/12

  Stretching rods · CPC title

• B29C49/46 Primary

  characterised by using particular environment or blow fluids other than air · CPC title

• B29C2049/5841

  Plural independent blowing paths · CPC title