| 摘要 |
PURPOSE:To obtain a good heat-resistant formed part with favorable thickness distribution and few internal strains without using a plug by a method wherein thermoplastic resin sheet, which is heated up to and softened at a temperature below its melting point, is formed by using pressure air, which is heated up to a temperature below the melting point of said resin. CONSTITUTION:Firstly, thermoplastic resin sheet is heated up to and softened at a temperature below its melting point or softening point. Secondly, said resin sheet is orientated by being applied with the pressure of the air heated in advance up to a temperature below the melting point or softening point of said resin so as to bring close contact with a mold in order to form. Further, the temperature of the air is preferably as near as possible to the melting point or softening point of the resin employed. EFFECT:Few secular change of the form of a formed part is resulted. A formed part faithful to the mold is obtained. And so on. |
