Title:
SCREW FOR DIRECT MOLDING, INJECTION MOLDING DEVICE, AND KNEADING PIECE
Document Type and Number:
WIPO Patent Application WO/2023/176029
Kind Code:
A1
Abstract:
Provided is a screw for direct molding capable of kneading a molten resin transported from the upstream side and an additive material introduced from the middle and more uniformly dispersing the additive material. A screw for direct molding (18) for transporting a thermoplastic resin supplied from the upstream side to the downstream side while melting the thermoplastic resin and kneading the molten resin transported with an additive material introduced from the middle, wherein the screw for direct molding comprises a screw body (60) and a kneading piece body (70); the screw body includes a first stage (S1) and a second stage (S2); a spiral main flight is provided on the outer circumferential surface of the first stage; a plurality of spiral flights are provided on the outer circumferential surface of the second stage; a plurality of spiral flights are provided on the outer circumferential surface of the kneading piece; and at least one notch is formed in the middle of the flights provided on the kneading piece.
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Inventors:
KUNIHIRO DAISUKE (JP)
UMEDA MITSUHIDE (JP)
CHIBA HIDEKI (JP)
UMEDA MITSUHIDE (JP)
CHIBA HIDEKI (JP)
Application Number:
PCT/JP2022/038448
Publication Date:
September 21, 2023
Filing Date:
October 14, 2022
Export Citation:
Assignee:
JAPAN STEEL WORKS LTD (JP)
International Classes:
B29C45/50; B29C45/60
Foreign References:
| JPH07266332A | 1995-10-17 | |||
| JP2012228784A | 2012-11-22 | |||
| JP2017205983A | 2017-11-24 | |||
| JP2018034376A | 2018-03-08 | |||
| JP2021123000A | 2021-08-30 |
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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