| 摘要 |
PROBLEM TO BE SOLVED: To improve the surface hardness, chemical resistance and the like of a composite hollow product by a method wherein a thermocuring resin, having a substantially uniform thickness and on which a mold shaping surface is transferred correctly, is adhered strongly to the surface of a thermoplastic resin. SOLUTION: DAP resin, for example, is employed as thermocuring resin. DAP prepolymer, DAP monomer or the like is resolved in a solvent and is applied directly on the surface of a mold 1, whose temperature is regulated previously at 60 deg.C, for example, by a spray gun to form the layer of powder-like prepolymer mixture on the surface of the mold 1. Subsequently, thermoplastic resin is heated to plasticize it, then, a parison is hang between opened molds 1 and the molds 1 are closed so as to pinch the parison, then, compressed air is sent to push the thermoplastic resin against the mold 1 and, simultaneously, integrate it with a thermocuring resin, coated previously. Further, the inside of the mold 1 is heated quickly through high-frequency induction heating simultaneously with the integration of both resins to cure the composite thermocuring resin on the surface of the thermoplastic resin. |
