Molten Metal Molding Machine

Abstract

A molten metal molding machine is provided with a heating cylinder, a linear motion member for successively feeding preheated metal rods into the heating cylinder from its rear end to successively push the metal rods toward a forward end of the heating cylinder, and a heater arranged on the heating cylinder such that the metal rods are gradually molten as they move through the heating cylinder from its rear end toward its forward end. The molten metal molding machine includes a guide pipe arranged on the forward end of the heating cylinder to downwardly feed molten metal into an injection sleeve, and an injection plunger arranged selectively movably forward and rearward in the injection sleeve such that by a forward movement of the injection plunger, the molten metal fed into the injection sleeve is injected and filled into a mold to subject the molten metal to cold-chamber molding.

1 . A molten metal molding machine provided with a heating cylinder, a linear motion member for successively feeding preheated metal rods into said heating cylinder from a rear end thereof to successively push said metal rods toward a forward end of said heating cylinder, and a heater arranged on said heating cylinder such that said metal rods are gradually molten as said metal rods move through said heating cylinder from said rear end thereof toward said forward end thereof, comprising: 
 a guide pipe arranged on said forward end of said heating cylinder to downwardly feed molten metal into an injection sleeve; and    an injection plunger arranged selectively movably forward or rearward in said injection sleeve such that by a forward movement of said injection plunger, said molten metal fed into said injection sleeve is injected and filled into a mold to subject said molten metal to cold-chamber molding.    
     
     
         2 . A molten metal molding machine according to  claim 1 , further comprising an inert gas feeder for feeding pressurized inert gas into said heating cylinder.  
     
     
         3 . A molten metal molding machine according to  claim 2 , wherein said inert gas feeder also feeds said pressurized inert gas into said guide pipe.  
     
     
         4 . A molten metal molding machine according to  claim 1 , further comprising an electric servomotor as a drive supply for said linear motion member.  
     
     
         5 . A molten metal molding machine according to  claim 1 , further comprising an oxide-film removing section arranged at said rear end of said heating cylinder to remove an oxide film from a surface of each of said preheated metal rods.