PURPOSE: To obtain a hollow molding with insert having a high added value by a method in which insert parts are inserted into the side wall of a molten thermoplastic resin parison, molds are closed, and then air blow is made.
CONSTITUTION: The side wall of the molten thermoplastic resin parison 4 is opened up, and then its aperture is interleaved with the insert part 7 held by a lever 6 inside the parison 4. Then, the molds 9 are closed and the parison 4 and the insert part 7 are pressed together before or after air blowing, and then air is blown into the parison to obtain the hollow molding with the insert, e.g., a thermoplastic resin fuel tank having a bulwark plate, etc. Also, a hollow molding with plural insert parts 7 and 10 can be obtained.
MIYAGI HIROSHI
HASEGAWA KENJI