Title:
FOAM MOLDED BODY PRODUCTION DEVICE, FOAM MOLDED BODY PRODUCTION METHOD AND SCREW FOR USE IN FOAM MOLDED BODY PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/184486
Kind Code:
A1
Abstract:
Provided is a foam molded body production device that performs foam molding by compressing a molten resin with a physical foaming agent at a constantly fixed pressure in a starved zone, achieving excellent foam molding where fine cells are formed inside the molded body, with no reduction in the ability to foam the molded body, even if the size of the device is increased further. The foam molded body production device 1 comprises: a cylinder 10 having a plasticization zone 40, wherein a thermoplastic resin undergoes plasticization and melting to be turned into a molten resin, and a starved zone 16 in a molten resin-starved state, provided with an introduction port 2 for introducing a physical foaming agent into the starved zone 16; a screw 20 disposed in the interior of the cylinder 10 so as to be rotatable around an axis and movable back-and-forth in the axis direction; and a pressure adjustment container 5 for introducing the physical foaming agent at a constant pressure through the introduction port 2 into the starved zone 16, to hold the starved zone 16 at a constantly fixed pressure. The screw 20 has a multi-flight structure in the starved zone 16.
Inventors:
YUSA ATSUSHI (JP)
YAMAMOTO SATOSHI (JP)
NAMIKI KAZUYA (JP)
YAMAMOTO SATOSHI (JP)
NAMIKI KAZUYA (JP)
Application Number:
PCT/JP2020/009869
Publication Date:
September 17, 2020
Filing Date:
March 06, 2020
Export Citation:
Assignee:
SANKEI GIKEN KOGYO CO LTD (JP)
MAXELL LTD (JP)
NIHON YUKI CO LTD (JP)
MAXELL LTD (JP)
NIHON YUKI CO LTD (JP)
International Classes:
B29C45/50; B29C44/00; B29C45/60
Foreign References:
| JP2019018522A | 2019-02-07 | |||
| JP2004098335A | 2004-04-02 |
Attorney, Agent or Firm:
KURIBAYASHI, Mitsuo (JP)
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