US 12,030,268 B2
Pipe joint manufacturing method and mold
Yuji Nakamoto, Koga (JP); and Fuminori Oba, Koga (JP)
Assigned to SANOH INDUSTRIAL CO., LTD., Tokyo (JP)
Appl. No. 17/623,446
Filed by SANOH INDUSTRIAL CO., LTD., Tokyo (JP)
PCT Filed Jul. 3, 2020, PCT No. PCT/JP2020/026238
§ 371(c)(1), (2) Date Dec. 28, 2021,
PCT Pub. No. WO2021/002462, PCT Pub. Date Jan. 7, 2021.
Claims priority of application No. 2019-125367 (JP), filed on Jul. 4, 2019.
Prior Publication US 2022/0347948 A1, Nov. 3, 2022
Int. Cl. B29C 70/72 (2006.01); B29C 70/68 (2006.01); B29L 31/24 (2006.01)
CPC B29C 70/72 (2013.01) [B29C 70/681 (2013.01); B29L 2031/24 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A manufacturing method for manufacturing a pipe joint including a circular tube-shaped housing and an elastically deformable circular tube-shaped seal member provided at an inner peripheral side of the housing, the pipe joint manufacturing method comprising:
placing the seal member inside a mold in a state in which the seal member is fitted to an outer periphery of a retaining pin; and
causing a molten resin to flow into the mold so as to mold the housing in a state in which the seal member is cooled through the retaining pin.