Liquid blow molding method and liquid blow molding apparatus

Patent metadata

Field	Value
Publication number	US-2018290366-A1
Application number	US-201615766240-A
Country	US
Kind code	A1
Filing date	Oct 17, 2016
Priority date	Nov 27, 2015
Publication date	Oct 11, 2018
Grant date	—

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

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; and 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.

2 . The liquid blow molding method of claim 1 , further comprising
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, wherein, 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.

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

4 . 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.

5 . A liquid blow molding apparatus configured to mold a bottomed tubular-shaped preform into a liquid-containing container in which a content liquid is held, the liquid blow molding apparatus comprising:
a mold in which the preform that has been heated to a predetermined temperature is to be fitted; a blow nozzle configured to engage with a mouth of the preform fitted in the mold; a first supply path configured to be connected to the blow nozzle to supply the first liquid to the blow nozzle; a sealing body configured to be arranged inside the first supply path in a manner such that the sealing body is displaceable in upward and downward directions to open and close the blow nozzle; a second supply path configured to be disposed in the sealing body in a manner such that the second supply path opens to a lower end surface of the sealing body to supply a second liquid to the blow nozzle; and a seal pin configured to be disposed inside the second supply path to open and close the second supply path, wherein the first liquid is supplied at a predetermined pressure into the preform through the first supply path to liquid blow mold the preform, and the second liquid is supplied into the preform through the second supply path after or simultaneously with the supply of the first liquid.

6 . The liquid blow molding apparatus of claim 5 , wherein
a stretching rod is fitted to an axis of the sealing body in a manner such that the stretching rod is displaceable in upward and downward directions relative to the sealing body, and the second supply path is disposed on an axis of the stretching rod along an axis direction of the stretching rod.

7 . 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.

8 . The liquid blow molding method of claim 3 , 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.

Assignees

• Okuyama Yuichi
• Shiokawa Mitsuru
• Yoshino Kogyosho Co Ltd

Inventors

• Okuyama Yuichi
• Shiokawa Mitsuru

Classifications

• B29D22/003

  Containers for packaging, storing or transporting, e.g. bottles, jars, cans, barrels, tanks · CPC title

• B29C49/4289

  Valve constructions or configurations, e.g. arranged to reduce blowing fluid consumption · CPC title

• B65D1/00

  Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material (with curved or partially-curved cross-section made by winding or bending paper B65D3/00; with polygonal cross-section formed by folding B65D5/00; specially constructed to be opened by cutting, piercing or tearing of wall portions B65D17/00; rigid pallets with side walls B65D19/02) · CPC title

• B29C2049/4658

  oil · CPC title

• B29C2049/4655

  water · CPC title