Method of casting aluminum or aluminum alloy

Abstract

A unit sand mold is produced within a mold making chamber in the casting line. The unit sand mold has cavities on the front and rear faces in the line direction. A plurality of unit sand molds thus produced are connected by joining the front face of one unit sand mold to the rear face of the preceding unit sand mold to form a train of connected sand molds. Molten aluminum or aluminum alloy is injected into the cavity through an injection port provided at the boundary between the joined faces. The train of connected sand molds is then divided by cutting at a substantially central portion of each unit sand mold or of every nth unit sand mold (n is an integer of two or more) and the unit sand mold(s) is/are dipped in water to be cooled. The sand mold is then dismantled, and sand thus obtained is dried and supplied to the mold making chamber for reuse.

1 . A method of casting aluminum or aluminum alloy comprising the steps of: 
 producing a sand mold;    injecting molten aluminum or aluminum alloy into the sand mold;    cooling a casting thus obtained together with the sand mold by means of water or a liquid coolant; and    dismantling the sand mold.    
   
   
       2 . The method of casting aluminum or aluminum alloy according to  claim 1 , wherein the cooling step comprises dipping the sand mold together with the casting in water or the liquid coolant.  
   
   
       3 . A method of casting aluminum or aluminum alloy comprising the steps of: 
 producing a unit sand mold within a mold making chamber on a casting line, the unit sand mold having cavities on front and rear faces thereof in a direction of the casting line;    connecting a plurality of unit sand molds thus produced on the casting line by joining the front face of one unit sand mold to the rear face of the preceding unit sand mold to form a train of connected unit sand molds, and injecting molten aluminum or aluminum alloy into the cavity through an injection port provided at a boundary between the joined faces;    cutting the train of connected sand molds at a substantially central portion of each unit sand mold or of every nth sand molds (n is an integer of two or more), and dipping the unit sand mold(s) into water or a liquid coolant; and    dismantling the sand mold.    
   
   
       4 . The method of casting aluminum or aluminum alloy according to  claim 1 , further comprising the step of drying sand obtained by dismantling the sand mold and supplying this sand to the casting chamber for reuse.  
   
   
       5 . The method of casting aluminum or aluminum alloy according to  claim 2 , further comprising the step of drying sand obtained by dismantling the sand mold and supplying this sand to the casting chamber for reuse.  
   
   
       6 . The method of casting aluminum or aluminum alloy according to  claim 3 , further comprising the step of drying sand obtained by dismantling the sand mold and supplying this sand to the casting chamber for reuse.