TUBE MATERIAL MOLDING DEVICE

摘要

[PROBLEMS] To provide a molding device that a plurality of split dies can be equally clamped with a single drive source. [MEANS FOR SOLVING PROBLEMS] In subjecting a tube material to drawing and caulking, a tube material is first externally inserted into a cored bar (30). In this case, upper and lower split dies (11, 12) constituting an external die (1) are in a mold opened state. From this state, an upper split die (11) constituting an external die (1) is moved downwardly. This allows four split dies (21, 22, 23, 24) constituting an inner die (2) to evenly move toward the center, and an exhaust pipe is subjected to drawing and caulking simultaneously by molding faces (26, 27) formed on the inner face of the four split dies.