| 摘要 |
PURPOSE:To extrude a product having a complicated crosssection in one stepped process, by adding a mechanical force and a static pressure of a fluid medium onto a blank material separately in two steps in an extrusion process. CONSTITUTION:When an extrusion ram 2 is pushed forward in the direction of an arrow 18 by feeding pressurized oil into a hydraulic cylinder 17, a blank material 19 in an extrusion container 1 is passed through a die hole of an extrusion die 3 to be extruded into a highly pressurized liquid medium 4 of a container 5 while being formed into an intermediate blank material 20. Here, the material 20 is pressed by the medium 4 to be passed through the die hole of an extrusion die 6 and is extruded to the outside as shown by an arrow 22 while being formed into a product 21. The pressure of the medium 4 is made comparatively lower because the static extrusion in the container 5 is the 2nd step. Thus the container is made smaller and repective devices are also made compact. |
