| 摘要 |
PURPOSE:To bend a section very easily and accurately by inserting the section in specified synthetic resin and after bending, taking out the section from the synthetic resin when bending a thin section such as a sash frame made of Al etc. CONSTITUTION:When bending the section 1 in a plane parallel to a web 1A, a pair of sections 1, 1 are arranged parallel to reference face of bending (web 1A face) and held opposite to each other. The whole is inserted in synthetic resin in that state, and an inserted body 10 is formed. The synthetic resin used has proper hardness to allow plastic deformation to enable succeeding bending and to prevent deformation other than bending during bending. Melting point is lower than temperature of recrystallization of the section to prevent bad influences on the strength etc. of the section. After bending the inserted body 10 by ordinary process, it is heated to above melting point of the synthetic resin, softened synthetic resin 11 is stripped off, and the sections, 1, 1 are taken out. |
