PLASTICIZING SCREW FOR INJECTION MOLDING AND INJECTION MOLDING METHOD USING SAME - MITSUBISHI HEAVY IND PLASTIC TECHNOLOGY CO LTD

Title:

PLASTICIZING SCREW FOR INJECTION MOLDING AND INJECTION MOLDING METHOD USING SAME

Document Type and Number:

WIPO Patent Application WO/2012/056505

Kind Code:

A1

Abstract:

This plasticizing screw for injection molding is provided with a shaft, a main flight, and a sub-flight, and is installed in an injection molding machine that performs injection molding by plasticizing a thermoplastic resin starting material containing reinforcing fibers. The protrusion height of the main flight from the shaft peripheral surface is formed in a fixed manner at least at the region at which the sub-flight is provided. The sub-flight is provided with: a flat-surface section that is provided to the back-end side in the direction of winding and that has a protrusion height from the shaft peripheral surface that is fixed and lower than that of the main flight; and a tilted-surface section that is provided in a manner so as to extend continuously from the front end in the direction of winding of the flat-surface section, and that has a protrusion height from the shaft peripheral surface that gradually increases in the direction towards the front-end side in the direction of winding within a range that is lower than the main flight.

Inventors:

KARIYA TOSHIHIKO (JP)
TODA NAOKI (JP)
NOBUTA MUNEHIRO (JP)

Application Number:

PCT/JP2010/068824

Publication Date:

May 03, 2012

Filing Date:

October 25, 2010

Export Citation:

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Assignee:

MITSUBISHI HEAVY IND PLASTIC TECHNOLOGY CO LTD (JP)
KARIYA TOSHIHIKO (JP)
TODA NAOKI (JP)
NOBUTA MUNEHIRO (JP)

International Classes:

B29C45/47; B29C45/60; B29K105/12

Foreign References:

JPH0612014U	1994-02-15
JPH08103926A	1996-04-23
JPS61141523A	1986-06-28
JPH08281740A	1996-10-29
JPS61222707A	1986-10-03

Other References: