Melt-molding metallurgical method

Abstract

A melt-molding metallurgical method includes the steps of: (A) preparing raw material powder and a binder material; (B) mixing the raw material powder and the binder material to obtain pellets; (C) pressing the pellets to obtain a solid state material; (D) preparing a molding device which includes a conveying unit and a forming space; (E) activating the conveying unit; (F) heating the solid state material to become a liquid state material; (G) driving the solid state material that has not melted to push the liquid state material into the forming space; (H) cooling the liquid state material to solidify the same into a blank; (I) debinding the blank; and (J) sintering the blank.

What is claimed is: 
     
         1 . A melt-molding metallurgical method comprising:
 (A) preparing raw material powder and a binder material;   (B) mixing the raw material powder and the binder material to obtain pellets;   (C) pressing the pellets to pass through an eye mold so as to obtain a solid state material;   (D) preparing a molding device, the molding device including a conveying unit disposed downstream of the eye mold for conveying the solid state material along a conveying direction, a heating unit disposed downstream of the conveying unit along the conveying direction, and a molding unit, the heating unit including a main body, a nozzle disposed on a downstream side of the main body, and a heating channel extending through the main body and the nozzle for passage of the solid state material therein, the molding unit including at least two molds that cooperate with each other to define a forming space, the nozzle having an injection port communicating with the heating channel;   (E) activating the conveying unit for conveying the solid state material from the eye mold to the heating channel;   (F) heating the solid state material to melt a portion of the solid state material that is proximate to a forming space and become a liquid state material;   (G) driving the solid state material that has not melted to push the liquid state material into the forming space;   (H) cooling the liquid state material in the forming space to solidify the same into a blank;   (I) debinding the blank for removing the binder material from the blank; and   (J) sintering the blank to obtain a finished product.   
     
     
         2 . The melt-molding metallurgical method as claimed in  claim 1 , wherein in step (A), the raw material powder is one of metal powder, glass powder and plastic powder. 
     
     
         3 . The melt-molding metallurgical method as claimed in  claim 1 , wherein the solid state material in step (C) has a linear or rod shape. 
     
     
         4 . The melt-molding metallurgical method as claimed in  claim 1 , wherein in step (F), the heating unit is activated to heat the solid state material in the heating channel, and the portion of the solid state material that is proximate to the forming space is melted to form the liquid state material. 
     
     
         5 . The melt-molding metallurgical method as claimed in  claim 1 , wherein in step (G), the solid state material that has not melted is driven by the conveying unit to push the liquid state material so as to inject the liquid state material from the nozzle into the forming space. 
     
     
         6 . The melt-molding metallurgical method as claimed in  claim 1 , wherein the molding unit in step (D) includes two molds mated in an up-down direction, a lower one of the molds having an insertion hole for insertion therein of the nozzle, the heating channel communicating with the forming space through the injection port.