Document Type and Number:
Japanese Patent JPS5027031
Kind Code:
B1
Abstract:
1,269,690. Making casting moulds; drawing. KABELUND METALLWERKE GUTEHOFFNUNGSHUTTE A.G. 13 Nov., 1969 [19 Nov., 1968], No. 55624/69. Heading B3A, B3F and B3P. A longitudinally curved mould, for example a copper arc type mould for a continuous casting machine, is made by pressing a longitudinally curved mandrel having external dimensions equal to the internal dimensions of the mould, preferably a chromium plated mandrel, into a longitudinally curved metal tube, cold forming the tube so that it conforms in shape to the mandrel and removing the mandrel. A mandrel 2 inserted in a tube 1 is pressed through a ring 3 to make the tube conform to the shape of the mandrel. The hardness of the tube is increased from 30-35 kp./mm.2 to approximately 90 kp./mm2 . during the cold forming step. The mould formed may be of rectangular, square or polygonal section or it may be conical.
Application Number:
JP9133169A
Publication Date:
September 04, 1975
Filing Date:
November 14, 1969
Export Citation:
International Classes:
B21B1/22; B21C1/22; B21C3/16; B21D9/00; B21D9/12; B22D11/04; B22D11/057; (IPC1-7): B22D11/04; B22C9/00; B22D7/06; B21D9/00