Document Type and Number:
Japanese Patent JPS4949858
Kind Code:
A
Abstract:
An extrusion die assembly and method for extruding circular billets with a relatively high length-to-diameter ratio comprising an extruding die located in one end of a sealed container which is adapted to receive a hydraulic ram, the ram being actuated by a hydraulic press, means for positioning and locating a billet in proper registry with respect to the die, means for introducing fluid into the chamber around the billet as the ram is withdrawn, the billet being extruded hydrostatically through the die as the ram is subsequently advanced in the fluid chamber, the billet forcing the end of the preceding billet through the die as it is advanced toward the entrance region of the die whereby a continuous extrusion of successive billets may be achieved as each billet is subjected to hydrostatic loading, the contiguous relationship of the billets preventing hydrostatic shock due to expulsion of a billet from the die and sudden decompression of the fluid.
Application Number:
JP5792373A
Publication Date:
May 15, 1974
Filing Date:
May 25, 1973
Export Citation:
International Classes:
B21C23/00; B21C23/21; B21C25/02; (IPC1-7): B21C23/04
Domestic Patent References:
| JPS49161A | 1974-01-05 |