Mold and a method for manufacturing the same

Abstract

A mold includes a mold insert body made of at least two kinds of materials. The materials have different coefficients of thermal conductivity. The mold insert body includes a union part formed by sintering the materials, and the union part has a configuration set so as to correspond to a cooling way of a molding material flowed in a cavity forming part of the mold.

1 - 10 . (canceled)  
   
   
       11 . A method for manufacturing a mold, comprising the steps of: 
 a) providing a powder of a first material;    b) providing a powder of a second material different from the powder of the first material so as to form a configuration that corresponds to a cooling way of a molding material flowed in a cavity forming part of the mold; and    c) sintering the respective powders by putting the powders of the respective materials between a first electrode and a second electrode, by pressuring with a designated pressure power, and by sending a designated electric current to the powders of the respective materials.    
   
   
       12 . The method for manufacturing the mold as claimed in  claim 11 , further comprising the step of: 
 d) providing a powder of a third material having a coefficient of thermal conductivity different from the first material and second material.    
   
   
       13 . The method for manufacturing the mold as claimed in  claim 11 , wherein the powders of the respective materials are sintered in a body.  
   
   
       14 . The method for manufacturing the mold as claimed in  claim 11 , 
 wherein powders of the respective materials are sintered by discharge plasma.    
   
   
       15 . The method for manufacturing the mold as claimed in claim  1   1 , further comprising; 
 forming a mold pattern is formed on the first electrode and the second electrode, and    wherein the mold pattern corresponds to a configuration of a molded article manufactured by the mold.    
   
   
       16 . The method for manufacturing the mold as claimed in  claim 11 , further comprising the step of: 
 e) forming an inclination layer in between respective layers by filling a mix powder made of the powders of the respective materials.    
   
   
       17 . The method for manufacturing the mold as claimed in  claim 16 , wherein a ratio of the first material to the second material varies along a cross section of the mold insert body.  
   
   
       18 . The method for manufacturing the mold as claimed in claim  1   1 , wherein 
 the cooling way of the molding material is determined by a cooling rate of the molding material or a difference of a temperature of the molding material at respective parts in the cavity forming part.