| 摘要 |
PURPOSE:To prevent jetting and contamination of a medium by moving backward a working stem after an extrusion, subsequently, moving backward a container from a fitting die, and reducing a pressure of a pressure medium, in case of an extrusion through a viscous plastic pressure medium of a high temperature billet. CONSTITUTION:A high temperature billet 18 is extruded from a gap of an inner hole 6 of a die 3 and a tip 17 of a supporting rod 16 by pressure of a seal piston 11 by a pressure stem through a viscous plastic pressure medium 14. The pressure medium 14 is brought to pressure-reduction by moving backward the pressure stem 10 and moving backward a container 8 by a piston 9, and it is not feared that the medium is jetted and contaminated after the end of the extrusion. |
