US 12,138,845 B2
Molded resin body production method
Tadahiro Yabu, Osaka (JP); Hiroyuki Sendan, Osaka (JP); Tadaharu Isaka, Osaka (JP); and Ryouichi Fukagawa, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/262,912
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
PCT Filed Jun. 6, 2019, PCT No. PCT/JP2019/022595
§ 371(c)(1), (2) Date Jan. 25, 2021,
PCT Pub. No. WO2020/021875, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 2018-140158 (JP), filed on Jul. 26, 2018.
Prior Publication US 2021/0276238 A1, Sep. 9, 2021
Int. Cl. B29C 48/92 (2019.01); B29B 7/42 (2006.01); B29B 7/48 (2006.01); B29B 7/58 (2006.01); B29B 7/72 (2006.01); B29C 48/04 (2019.01); B29C 48/37 (2019.01); B29K 27/00 (2006.01); B29K 27/18 (2006.01)
CPC B29C 48/92 (2019.02) [B29B 7/428 (2013.01); B29B 7/488 (2013.01); B29B 7/582 (2013.01); B29B 7/726 (2013.01); B29B 7/728 (2013.01); B29C 48/04 (2019.02); B29C 48/37 (2019.02); B29C 2948/92514 (2019.02); B29C 2948/926 (2019.02); B29C 2948/92704 (2019.02); B29C 2948/92876 (2019.02); B29K 2027/16 (2013.01); B29K 2027/18 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for producing a resin molded article using a molding machine provided with a hopper for resin, an extruder, and a pressure control device in this order, the method comprising:
feeding the resin into the hopper;
passing the resin fed from the hopper through the molding machine to produce the resin molded article, and
adjusting a resin pressure between a tip of the extruder and an inlet port for resin of the pressure control device to be 15.0 MPa or lower with the pressure control device, such that, through the adjustment of the resin pressure by the pressure control device a percent change between a melt flow rate of the resin fed into the hopper and a melt flow rate of the resin of the resin molded article obtained is 50% or lower,
wherein the melt flow rates are measured under the same conditions, and
the resin is a thermoplastic fluororesin.