Gravity casting

Generally, the hub of the casting process is divided into - gravity casting, low-pressure casting and spinning casting.

Gravity casting, one will be endangered wheel production process, it mainly melted liquid filled the entire wheel mold, aluminum itself weight after natural cooling forming, the hub of high yield, lower cost of the mould, but the disadvantages also clear -- the flow of the liquid metal time difficult to control, because the liquid metal in the process of slow-moving unavoidably caused from the far end of pouring gate metal temperature is low, at this point, the mould and stable temperature control is very important, too high or too low will affect the quality of wheel manufacturing;However, in order to prevent premature solidification, the temperature of aluminum water needs to be raised, but it is easy to cause uneven distribution of molecules and more sand holes are formed. At this time, more aluminum water must be injected to maintain the strength, so the finished weight of the wheel hub cast by gravity will increase.