| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum forming apparatus for a metallic article capable of inexpensively forming the metallic article without pinholes or burrs and capable of preventing an oxidation or an ignition of the metallic article. SOLUTION: The vacuum forming apparatus comprises a No.1 step and a No.2 step hopper (3, 20), a screw type injection molding machine (IJ), and molds (41, 42). And the No.1 step vacuum hopper (3) and the No.2 step vacuum hopper (20), the No.2 step vacuum hopper (20) and a cylinder supply port (31), and a screw terminal portion and a screw driving portion are airtightly connected through vacuum seals (13, 24, 34) having a cooling function, and the molds (41, 42) are so designed as to be enhanced by internal pressure filled with molten metal materials (Y.K) generated as soon as the unit pressure in the innermost side portion (61) of the cavity (47) side of the die matching surface (P) terminates an injection filling or by swelling members (83, 91) to swell with a high-pressured fluid.
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