Process for producing skin material laminated hollow molded article using fluid ejection pin

摘要

PCT No. PCT/JP93/01773 Sec. 371 Date Aug. 3, 1994 Sec. 102(e) Date Aug. 3, 1994 PCT Filed Dec. 7, 1993 PCT Pub. No. WO94/13456 PCT Pub. Date Jun. 23, 1994A process for producing a skin material-laminated hollow molded article of thermoplastic resin, using a mold having, in any one or both of its fixed and movable parts, at least one fluid-ejecting pin which can be slid in a clamping direction and which has a fluid-ejecting hole at its pointed end. The process consists of fixing two sheets of a skin material having a tensile modulus at ambient temperature of 50-1,000 kg/cm2 and a tensile modulus at 80 DEG C. of 5 to 100 kg/cm2 on the parting surfaces of both the mold parts which are in the open state. A molten thermoplastic resin is fed between the skin materials in an amount of 5 to 50% by volume of the cavity volume. The fluid-ejecting pin is thrusted so that its pointed end penetrates one of the skin material sheets and comes between the skin material sheets. The mold parts are closed to wrap the molten thermoplastic resin in between the skin material sheets. A fluid is ejected from the fluid-ejecting hole to intimately contact the skin material sheets with the cavity surface of the mold while allowing the molten resin to form a hollow. The mold is cooled and the ejection of the fluid is stopped. The mold is then opened and the hollow molded article is removed.