PURPOSE: To mold the receiving mouth having good appearance of a thermal resin pipe composed of a crystalline resin such as polyethylene with good productivity without generating the dimensional change of the receiving mouth.
CONSTITUTION: The small diameter part 21 of an inner mold 2 having an outer diameter almost same to the inner diameter of the end part of a thermoplastic resin pipe P is inserted in the end part of the heated and softened thermoplastic resin pipe P and a cavity having the same shape as a receiving mouth to be molded is formed by the end part of the thermoplastic resin pipe P, the molding surface 20 of the inner mold 2 and the molding surface 10 of an outer mold 1 and the same molten resin as the thermoplastic resin pipe P is filled into the cavity to be molded into a receiving mouth shape to mold the receiving mouth fused and bonded to the end part of the thermoplastic resin pipe.
MIYAZAKI TOSHIHIKO
MAKINODAN TOSHIMI
