PLASTICIZING DEVICE FOR MOLDING THERMOPLASTIC RESIN FOAM

Title:

PLASTICIZING DEVICE FOR MOLDING THERMOPLASTIC RESIN FOAM

Document Type and Number:

Japanese Patent JP2001001379

Kind Code:

A

Abstract:

To provide the subject plasticizing device solved in seal problem, simple in structure and capable of being obtained inexpensively though inert gas such as carbon dioxide or nitrogen gas of a supercritical state is injected in a screw cylinder.

A plasticizing device is constituted of a screw cylinder 1 and the screw 20 provided in the screw cylinder 1 so as to be drivable in rotary and axial directions. A material supply hole 7 is provided to the screw cylinder 1 in the vicinity of the rear end part thereof and an injection nozzle 5 is provided to the leading end part thereof and a gas supply hole 2 for injecting inert gas of a supercritical state is provided between the material supply hole 7 and the injection nozzle 5 and the gas supply hole 2 is provided at the position corresponding to the low pressure part T of the second stage S2 of the screw 20.

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Inventors:

TERAOKA ATSUO
TSUDA BUNRO
OYABU HIDEO

Application Number:

JP17189299A

Publication Date:

January 09, 2001

Filing Date:

June 18, 1999

Export Citation:

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Assignee:

JAPAN STEEL WORKS LTD

International Classes:

B29C45/50; B29C45/52; B29C45/58; (IPC1-7): B29C45/50

Attorney, Agent or Firm:

Yoshiaki Sugitani (1 outside)

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