| 摘要 |
PURPOSE: A replaceable mold for shaping a metallic pipe of a T-shape is provided to change the diameter of a branch pipe using a bush of different mold and thickness. CONSTITUTION: A replaceable mold for shaping a metallic pipe of a T-shape comprises an upper bush(300), a lower bush(400), a branch mold(500), an upper mold(100) and a lower mold(200). The lower bush protects the outer lower circumferential surface of the head of the metallic pipe. The lower bush forms a cylindrical hole in a direction perpendicular to the horizontal shaft of the head. The branch mold is inserted into the cylindrical hole of the lower bush. The branch mold is vertically punched and supplies a space, in which the branch pipe is shaped. The upper mold protects the upper bush. The lower mold protects the lower bush.
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