Sintering device

Abstract

A sintering device comprising a tray including a tray part in which metallic workpieces to be sintered (not represented here) are placed during the sintering operation and a base part in which the tray is located including gas-flowing holes and side wall extended upwardly from the edge of the upper surface of the base part, and a sintering chamber including side wall extended downwardly from the upper surface for covering the tray part and at least one gas flow passage between the inner surface thereof and outer surface of the side wall of the tray part; wherein the tray part and base part are integrally formed; wherein the base part includes at the lower portion through holes in horizontal and longitudinal directions for gas inflowing and discharging, a hole at crossover point of the through holes for penetrating the center portion of the base plate and extended to the exterior, and wherein the lower end of the sinter chamber is disposed on the lowered and stepped surface of the base part and the stepped portion formed in the middle of the side wall of the sintering chamber is supported by the upper end of the side wall of the tray for allowing the gas to flow.

What is claimed is: 
     
         1 . A sintering device comprising a tray including a tray part in which metallic workpieces to be sintered (not represented here) are placed during the sintering operation and a base part in which the tray is located including gas-flowing holes and side wall extended upwardly from the edge of the upper surface of the base part, and a sintering chamber including side wall extended downwardly from the upper surface for covering the tray part and at least one gas flow passage between the inner surface thereof and outer surface of the side wall of the tray part;
 wherein the tray part and base part are integrally formed;   wherein the base part includes at the lower portion through holes in horizontal and longitudinal directions for gas inflowing and discharging, a hole at crossover point of the through holes for penetrating the center portion of the base plate and extended to the exterior, and   wherein the lower end of the sinter chamber is disposed on the lowered and stepped surface of the base part and the stepped portion formed in the middle of the side wall of the sintering chamber is supported by the upper end of the side wall of the tray for allowing the gas to flow.   
     
     
         2 . The sintering device as claimed in  claim 1 , wherein a cylindrical member for the prevention of oxidization is disposed on the base part between the side walls of the tray part and sintering chamber to prevent the oxygen contacting the metallic workpiece. 
     
     
         3 . The sintering device as claimed in  claim 2 , wherein the cylindrical member is formed in a sheet made from titanium or titanium allow. 
     
     
         4 . The sintering device as claimed in  claim 1 , wherein the inner diameter of the sidewall of the sintering chamber is bigger than the outer diameter of the side wall of the tray part to form a cylindrical space as a gas flow passage between the side walls of the tray part and sintering chamber, and the cylindrical space is communicated with the through holes in horizontal and longitudinal directions formed at the base part.