METHOD FOR MANUFACTURING RESIN MOLDED PRODUCT

WIPO Patent Application WO/2020/044529

A1

The purpose of the present disclosure is to reliably form a desired texture on the inner surface of a hollow resin molded product. The present disclosure is a method for manufacturing a resin molded product in which a resin molded product (drain pipe 10) having a hollow portion (flow path 11) is molded by joining a first divided body 21 and a second divided body 22. The manufacturing method includes a molding step for molding the first divided body and the second divided body by primary injecting a resin material into a space (cavities 210, 220) formed by a first mold 400 and a second mold 500, a moving step for bringing the first divided body and the second divided body closer to each other by the relative movement of the first mold and the second mold, and a joining step of joining the first divided body and the second divided body. A texture forming part for molding a texture on the inner surface of the hollow portion is provided on at least one of the region of the first mold corresponding to the second divided body in the molding step and the region of the second mold corresponding to the first divided body in the molding step.

JPS5677127

INJECTION MOLDING MOLD MANUFACTURING MOUNTING PART AND PIPE JOINT FROM THERMOPLASTIC PLASTIC

MORIMOTO MASANORI
IMAIZUMI MASAHIKO
NAKASHIMA NORIYASU
ASAJI MASAHIRO
ISHII KENJI
YAMAZAKI RYO

PCT/JP2018/032322

March 05, 2020

August 31, 2018

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PANASONIC IP MAN CO LTD (JP)

B29C45/37; B29C33/42; B29C45/16; B29C65/02; B29C69/02; E03C1/284

JPS5633383U	1981-04-01
JP2017013443A	2017-01-19
JPH11147266A	1999-06-02
JP2001205681A	2001-07-31
JP2018035544A	2018-03-08
JPH08333784A	1996-12-17

HOKUTO PATENT ATTORNEYS OFFICE (JP)

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