| 摘要 |
PURPOSE:To extrude simultaneously plural pieces of shape materials of small section with high efficiency at a high yield by forming plural gaps of a die caliber and mandrel and passing the shape material through the gaps thereby extrusion-molding the shape materials. CONSTITUTION:The small diameter part 12 at the top end of the mandrel is inserted into the die caliber 3 to form one gap enclosing the mandrel 10 and the material is extruded through the gap in the stage of starting extrusion. A coupling part 13 is formed to the top end of the extruded material. The mandrel 10 is then advanced to form the plural gaps by the caliber 3 and the parallel part 11 of the mandrel. The shape material 2 is passed through such gaps and is extrusion-molded, by which the plural shape materials 2 separated from each other are extrusion-molded continuously to the part 13. The simultaneous and stable extrusion molding of the shape materials of small section is made possible by such method.
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