Working principle of multi-piston sand molding machine

The multi-piston sand  molding machine uses air pressure or hydraulic pressure to apply pressure to the molding sand in the sand box through the indenter or pattern to compact the molding sand. In the early 1950s, high-pressure molding machines appeared, and the pressure on the sand mold plane was above 0.7 MPa. The pressure is generally 0.25 to 0.4 MPa. This kind of molding machine makes the sand mold far away from the pressing surface with poor compactness.
 
   The indenter of the high-pressure molding machine is divided into several structural forms, such as flat indenter, forming indenter and multi-contact indenter. Among them, the high-voltage multi-contact molding machine is the most widely used. The pressing head of the high-pressure multi-contact molding machine is divided into many small square contacts that can move up and down, and a large pressing force can be obtained through the hydraulic cylinder.
 

   During compaction, each contact exerts corresponding pressure according to the height of the pattern below it (that is, the thickness of the compressed sand layer), so that the sand mold obtains a high and uniform compactness and hardness. This type of molding machine is equipped with a micro-shock shock mechanism, which can adapt to the modeling of complex shapes.

Qingdao Bestech Machinery Co.,Ltd