| 摘要 |
PURPOSE:To effectively restrain a temperature increase due to heat during transmission so as to achieve a good appearance and facilitate manufacturing work by extruding a hollow portion for a cooling medium passage on a conductive member formed of an extruded aluminum. CONSTITUTION:A hollow portion 2 having a round cross section for a cooling medium passage extends longitudinally in a thick portion in the intermediate position in the width direction of a conductive member 1. The conductive member 1 is formed of an extruded aluminum. The hollow portion 2 for the cooling medium passage is extruded simultaneously with extruding work of the conductive member 1. Consequently, it is possible to discharge a cooling medium into the hollow portion 2 for the cooling medium passage during transmission so as to effectively restrain an increase of temperature due to generated heat. |
