Extrusion die using shock-absorbing pad and method for manufacturing extrusion

Abstract

An extrusion die using a shock-absorbing pad and a method for manufacturing an extrusion. A shock-absorbing pad is inserted between a material to be processed and a die such that the shock-absorbing pad is deformed during extrusion to form an optimal die half angle, thereby efficiently extruding the material to be processed. The extrusion die for extruding the material to be processed includes a container for accommodating a material to be processed, a die which is mounted on the front of the container, and which has, in the center thereof, a die hole that is a path through which the material to be processed is extruded, a shock-absorbing pad inserted between the material to be processed and the die, and a ram for pressing the material to be processed.

1 . An extrusion mold for extruding a material to be machined, comprising:
 a container accommodating a material to be machined;   a die disposed on a front portion of the container, the die having a die hole as a passage through which the material to be machined is extruded;   a buffer pad disposed between the material to be machined and the die; and   a ram pressing the material to be machined.   
     
     
         2 . The extrusion mold according to  claim 1 , wherein
 the material to be machined comprises a core and a covering material cladding the core, and   the buffer pad is formed of a material having a yield strength lower than a yield strength of a material of which the core or the covering material is formed.   
     
     
         3 . A molding device for fabricating an extruded product by extruding a material to be machined, the molding device comprising the extrusion mold as claimed in  claim 1 . 
     
     
         4 . A method of fabricating a product by extruding a material to be machined, the method comprising:
 disposing a buffer pad between a material to be machined and a die;   extruding the material to be machined through a die hole by applying a pressure to the material to be machined; and   withdrawing a product extruded through the die hole.   
     
     
         5 . The method according to  claim 4 , wherein
 the material to be machined comprises a core and a covering material cladding the core, and   the buffer pad is formed of a material having a yield strength lower than a yield strength of a material of which the core or the covering material is formed.