Low-pressure casting multi-sprue process and device for aluminum alloy wheel

Abstract

The present application relates to a low-pressure casting multi-sprue process and device for an aluminum alloy wheel. A multi-sprue casting method is adopted, and a plurality of sprues are arranged at the end of the inner flange of a wheel, so that molten aluminum enters at the inner flange first, then enters from a center sprue after a mold cavity at the rim is full of the molten aluminum. The mold assembly is pressurized and cooled after the mold cavity is full of the molten aluminum. During cooling, starting from the outer flange of the wheel filled with the molten aluminum last, side mold ring water coolers are started.

What is claimed is: 
     
         1 . A low-pressure casting multi-sprue process for an aluminum alloy wheel, wherein that the casting process adopts a multi-sprue casting method, and a plurality of sprues are provided at the end of the inner flange of a wheel, so that molten aluminum enters at the inner flange first, and then enters from a center sprue after a mold cavity at the rim is full of the molten aluminum;
 during cooling, starting from the outer flange of the wheel filled with the molten aluminum last, side mold ring water coolers are started, and the side mold water coolers are close to the thick portions of the junctions of the spokes of the outer flange and the rim; top mold coolers are also ring water coolers, the top mold water coolers are located on a top mold above the spokes, and a center water cooler is adopted in the center of the top mold to cool the center sprue.   
     
     
         2 . The low-pressure casting multi-sprue process for an aluminum alloy wheel according to  claim 1 , wherein that in the low-pressure casting process, the front sides of the spokes and the outer flange of the wheel casting are upward, and the rim and the inner flange are at the lower part. 
     
     
         3 . The low-pressure casting multi-sprue process for an aluminum alloy wheel according to  claim 1 , wherein that a plurality of sprues are provided under the inner flange, the center sprue is arranged under the center of the wheel, and the plurality of sprues and the center sprues are also circular. 
     
     
         4 . The low-pressure casting multi-sprue process for an aluminum alloy wheel according to  claim 1 , wherein that side mold ring water coolers and the top mold ring water coolers are 15-40 mm away from the surface of the casting, the flow rate of cooling water is 150-400 L/hr, and the side mold ring water coolers need to be started immediately after the mold cavity is full of the molten aluminum.