Device and method for producing resin container

Patent metadata

Field	Value
Publication number	US-12544969-B2
Application number	US-202318496332-A
Country	US
Kind code	B2
Filing date	Oct 27, 2023
Priority date	Jan 31, 2019
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A manufacturing apparatus for manufacturing a resin container, the manufacturing apparatus includes an injection molding part, a temperature adjustment part, a blow molding part, a take-out part, and a rotation plate. The temperature adjustment part includes a first temperature adjustment mold into which the preform is inserted, the first temperature adjustment mold being configured to cool the preform from an outer surface of the preform, a second temperature adjustment mold into which the preform is inserted, the second temperature adjustment mold being configured to cool the preform from an inner surface of the preform, and wherein, in the temperature adjustment part, the preform is cooled so that at least the outer surface temperature of the preform is lowered within a temperature range from 10° C. to 50° C. as compared to the outer surface temperature of the preform when the preform is carried into the temperature adjustment part.

First claim

The invention claimed is:

1 . A manufacturing apparatus for manufacturing a resin container, the manufacturing apparatus comprising:
an injection molding part configured to injection-mold a preform; a temperature adjustment part configured to adjust a temperature of the preform molded in the injection molding part; a blow molding part configured to blow-mold the temperature-adjusted preform to manufacture the resin container; and a take-out part configured to take out the resin container; and a rotation plate including at least four sets of neck molds, wherein the rotation plate is configured to transport the preform to the injection molding part, the temperature adjustment part, the blow molding part, and is configured to transport the resin container to the take-out part while holding the preform or the resin container by each of the four sets of the neck molds sequentially moving to the injection molding part, the temperature adjustment part, the blow molding part and the take-out part, wherein the temperature adjustment part includes:
a first temperature adjustment mold into which the preform is inserted, the first temperature adjustment mold being configured to cool the preform from an outer surface of the preform,
a second temperature adjustment mold into which the preform is inserted, the second temperature adjustment mold being configured to cool the preform from an inner surface of the preform,
wherein, in the temperature adjustment part, the preform is cooled so that at least the outer surface temperature of the preform is lowered within a temperature range from 10° C. to 50° C. as compared to the outer surface temperature of the preform when the preform is carried into the temperature adjustment part, and wherein the second temperature adjustment mold is an air introduction/discharge member configured to cause a compressed air to come into contact with and convect within the inner surface of a body portion and of a bottom portion of the preform during cooling of the preform.

2 . The manufacturing apparatus for manufacturing a resin container according to claim 1 ,
wherein the first temperature adjustment mold is a temperature adjustment cavity mold including:
a space configured to come into contact with the outer surface of a body portion and of a bottom portion of the preform; and
a flow path through which a temperature adjustment medium flows.

3 . The manufacturing apparatus for manufacturing a resin container according to claim 1 ,
wherein the air introduction/discharge member includes:
a fitting core configured to come into contact in an airtight manner with a neck portion of the preform; and
a rod member configured to be inserted into the body portion,
an inner flowing port configured to supply or discharge compression air is provided inside the rod member, and an outer flowing port configured to supply or discharge compression air is provided in a gap between an inner peripheral surface of a tip end of the fitting core and an outer peripheral surface of the rod member.

4 . The manufacturing apparatus for manufacturing a resin container according to claim 1 ,
wherein the air introduction/discharge member is configured to perform:
a preliminary blow of blowing compression air into the body portion and the bottom portion of the preform to bring the body portion and the bottom portion of the preform into close contact with an inner wall of a temperature adjustment cavity; and
a cooling blow of blowing compression air into the body portion and the bottom portion of the preform to cool the body portion and the bottom portion of the preform, after the cooling blow.

5 . The manufacturing apparatus for manufacturing a resin container according to claim 1 ,
wherein the rotation plate is further configured to transport the perform from the injection molding part to the temperature adjustment part after a remaining heat of the preform due to injection molding has been cooled while the preform is demolded from an injection core mold and an injection cavity mold.

6 . The manufacturing apparatus for manufacturing a resin container according to claim 5 ,
wherein the rotation plate is further configured to take the preform out from the temperature adjustment part and transfer the perform to the blow molding part, the preform being cooled as compared to the preform when the preform is carried into the temperature adjustment part.

7 . The manufacturing apparatus for manufacturing a resin container according to claim 1 ,
wherein the temperature adjustment part is configured to bring the temperature adjustment cavity mold into contact with the outer surface of the preform to cool the preform from the outer surface, the temperature adjustment cavity mold being set to a predetermined temperature.

8 . The manufacturing apparatus for manufacturing a resin container according to claim 7 ,
wherein the temperature adjustment part is further configured to bring the second temperature adjustment mold into contact with the inner surface of the preform, the second temperature adjustment mold being set to predetermined temperature, and wherein the temperature adjustment part is configured to cool the preform by sandwiching the preform with the second temperature adjustment mold and the temperature adjustment cavity mold to compression-deform the preform.

9 . A manufacturing method for manufacturing a resin container, the manufacturing method comprising:
injection-molding a preform; transporting the preform from an injection-molding part to at least a temperature adjustment part; adjusting a temperature of the preform to which the injection-molding has been performed in the temperature adjustment part; and blow-molding the preform whose temperature has been adjusted; wherein the temperature adjustment part is configured to:
cool a body portion and bottom portion of the preform from an outer surface of the preform, using a first temperature adjustment mold; and
cool the body portion and the bottom portion of the preform from an inner surface of the preform, using a second temperature adjustment mold, and
wherein, in the temperature adjustment part, the preform is cooled so that at least the outer surface temperature of the preform is lowered within a temperature range from 10° C. to 50° C. as compared to the outer surface temperature of the preform when the preform is carried into the temperature adjustment part, wherein the second temperature adjustment mold is an air introduction/discharge member that causes a compressed air to come into contact with and convect within the inner surface of a body portion and of a bottom portion of the perform during cooling of the perform.

10 . A manufacturing apparatus for manufacturing a resin containers, the manufacturing apparatus comprising:
an injection molding part configured to injection-mold a first number of preforms; a temperature adjustment part configured to adjust a temperature of a second number of preforms among the first number of preforms molded in the injection molding part, the second number being smaller than the first number; a blow molding part configured to blow-mold the temperature-adjusted preforms, the second number of preforms being blow-molded at one time; and a take-out part configured to take out the second number of blow-molded containers; and a transportation mechanism configured to transport the preforms from the injection molding part to the blow molding part, wherein the temperature adjustment part is configured to perform multistage temperature adjustment processes, and to reduce differences of temperature among the second number of blow-molded preforms, wherein the temperature adju

Assignees

• Nissei Asb Machine Co Ltd

Inventors

• Tsuchiya Yoichi
• Ogihara Manabu
• Nagasaki Atsushi
• Horiuchi Kazuhiro

Classifications

• B29C49/6466

  on the inside · CPC title

• B29C49/6467

  on the outside · CPC title

• B29C49/6465

  Cooling · CPC title

• B29L2031/7158

  Bottles · CPC title

• B29K2067/003

  PET, i.e. poylethylene terephthalate · CPC title