| 摘要 |
PURPOSE:To make it possible to carry out continuously resin sheet-making, press-bonding and interfacial fusion of a resin skin material and press-molding, by carrying out interfacial fusion of two or more mixed resin sheets by controlling temp. at m.p. or higher of the resin skin material and press-molding it in the decreasing temp. range close to the solidifying temp. CONSTITUTION:A mixed resin is molten by heating at the m.p. or higher of a resin component having the highest m.p. and extruded from a die 1. This extruded molten resin is passed through sheet molding rolls 2 and 3 and sheet- making is carried out while surface molding and thickness adjusting are being done. Then, a resin skin material RS is inserted with a resin sheet PS of high temp. between the sheet-molding rolls 2 and 3 just before the temp. controlling process TC and the resin skin material RS is molten on its contacting interface by the heat held by the resin sheet PS and fused together. In the case of a mixed resin of polypropylene resin and polyethylene resin, it is molten at 200 deg.C and resin sheet-making is carried out. Interfacial fusion is accelerated around 190 deg.C which is the decreasing temp. being higher than the m.p. of the resin skin material by means of the temp. controlling rolls and lamination is thereby carried out. |
