Document Type and Number:
Japanese Patent JPS641212
Kind Code:
B2
Abstract:
PCT No. PCT/JP81/00114 Sec. 371 Date Jan. 13, 1982 Sec. 102(e) Date Jan. 13, 1982 PCT Filed May 26, 1981 PCT Pub. No. WO81/03441 PCT Pub. Date Dec. 10, 1981.This invention provides an indirect metal extrusion method, in which free die system is adopted. A die (8) of two-stepped structure is capable of removing shell or outer layer of a billet simultaneously at the time of extrusion, and eliminating the container cleaning cycle after the extrusion. Besides, a shear support (3), an independent body of the container (2), is disposed on the nearer side of the container (2) to an extrusion ram (4), so that discard integrally clung to the die (8) may be served after finishing of an extrusion stroke off the die (8) which is rested on the shear support (3) by means of a shear (14) or a shearing apparatus. This method enables shortening of the extrusion cycle and eliminating damage to principal structure of the extruder.
Inventors:
HAYASHI HIROMASA
MORI EIICHI
MORI EIICHI
Application Number:
JP6996480A
Publication Date:
January 10, 1989
Filing Date:
May 26, 1980
Export Citation:
Assignee:
SUMITOMO LIGHT METAL IND
International Classes:
B21C23/20; B21C25/02; B21C35/00; B21C35/04; B21C35/06