Patent ID: 6799449
Filing Date: 2004-10-05
Classification: B21D,Y10T

Abstract:
An apparatus for superplastic forming, which forms at least one sheet or plate into a predetermined shape by directing a compressed gas onto the sheet or plate while said at least one sheet or plate is located in a die, comprising:a layered body of at least two said dies which are arranged on several beds, and said dies having at least one gas injection hole and at least one gas discharging hole; a heating unit extending around the layered body for providing each said die with external heat; a chamber formed on an outer surface of the heating unit for sealing the at least two said dies except the at least one gas injection hole and the at least one gas discharging hole; and a press for compressing the dies into a closed condition during forming, wherein each respective one of said dies in the layered body includes an upper cavity and a lower cavity.