| 摘要 |
A molding device capable of improving the quality of a molded product is provided. A control unit (70) controls a blow mechanism (60) such that it supplies gas into a metal pipe material (14) and performs expansion molding. By this means, the metal pipe material (14) is expansion-molded to a shape corresponding to a main cavity portion (MC), and a section corresponding to a flange portion (80b) of the finished product expands toward a sub-cavity portion (SC). The control unit (70) controls a drive unit (81) such that it molds the flange portion (80b) by crushing a second molded section (14b) of the expanded metal pipe material (14) using the sub-cavity portion (SC). Here, the sub-cavity portion (SC) communicates with the outside of the die during molding of the flange portion (80b), and therefore air between the inner surfaces of the sub-cavity portion (SC) and the second molded section (14b) of the metal pipe material (14) can escape to the outside of the die. |
