METHOD AND DEVICE FOR EXTRUSION MOLDING OF PARISON

Title:

METHOD AND DEVICE FOR EXTRUSION MOLDING OF PARISON

Document Type and Number:

Japanese Patent JPH0615644

Kind Code:

A

Abstract:

PURPOSE: To make constitution of a layer and dispersion at a weld part and a circumferential direction uniform by making use especially of at least two kinds of different materials.

CONSTITUTION: An extrusion molding method and device of a parison is constituted so that molten resin in a weld part (5) in a parison head (1) is allowed to flow outside through a flow control valve (21).

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Inventors:

ITSUTANI TOSHIO
NINOMIYA SATOSHI

Application Number:

JP17246792A

Publication Date:

January 25, 1994

Filing Date:

June 30, 1992

Export Citation:

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Assignee:

JAPAN STEEL WORKS LTD

International Classes:

B29B11/10; B29C48/09; B29C48/32; B29C48/475; B29C49/04; B29C49/78; B29L22/00; (IPC1-7): B29B11/10; B29C47/04; B29C49/04; B29C49/78

Attorney, Agent or Firm:

Soga Doteru (6 people outside)

Next Patent: DATA TRANSMISSION METHOD