Heat treatment manner of different type long shaku compact

摘要

PPROBLEM TO BE SOLVED: To provide a heat treatment method for relaxing the stress remaining in a long profile molding which is obtained by heating only the part to be deformed of a long thermoplastic resin sheet uniaxially oriented to the length direction so that it can be deformed and by giving a shape. PSOLUTION: The heat treatment method comprises passing the long profile molding, which is obtained by heating only the part to be deformed of a long thermoplastic resin sheet uniaxially oriented to the length direction so that it can be deformed and thereby giving a shape, through the very passage of a heating mold that has a passage for the long profile molding almost same in the shape as the cross-sectional shape of the long profile molding and annealing the long profile molding. In the passage for the long profile molding, the part of the long profile molding that has not been deformed rather than the part that has been deformed is heated with a higher heat quantity, and the heating is conducted so that the total heat quantity of the heat quantity upon the heating/shaping and that upon the annealing may be nearly identical in any part of the whole long profile molding. PCOPYRIGHT: (C)2008,JPO&INPIT