PURPOSE: To improve the manufacturing efficiency and to work the material to be worked at low cost.
CONSTITUTION: A plate like material to be worked 18 is positioned to the front face side of opening part of a molding cavity 34 formed on a die 26. A flying body 24 composed of the sublimation material of the dry-ice, etc., is collided at high velocity with the position corresponding to the opening part of molding cavity of the material to be worked 18. Therefore, the material to be worked 18 is drawn inside the molding cavity 34, and deformed with plastic working to the outer shape along the shape of internal surface. Accordingly, because the grazing defect, etc., is not generated on the contact surface of the flying body and the material to be worked, so the remarkably nondefective worked surface can be obtained.
OKOCHI TEIICHI
KAWASHIMA KOICHIRO
MATSUBARA TOMIO
TAKENAKA HIROSHI
MORITA MOTOO
TOHO GAS KK
MORITA & CO KK