Do you know the difference between gravity casting and pressure casting?
Release time:2023-09-25
Do you know the difference between gravity casting and pressure casting?
Many people do not know the difference between gravity casting and pressure casting, thinking that they are the same operation, but different names. In fact, these two machines are completely different, today Ustar will take you to understand the difference between these two machines.
The principle of gravity casting is to rely on the action of gravity, so that the liquid aluminum is naturally filled into the mold by gravity, of course, there are also centrifugal casting, which also belongs to the scope of gravity casting. Gravity casting is generally used in parts with complex internal shapes (such as gasoline refueling guns).
The types it contains are also different, mainly depending on which aspect you look at, such as in a broad sense, sand casting, metal casting, investment casting, lost casting, mud casting, etc., all belong to gravity casting; But in a narrow sense, gravity casting mainly refers to metal casting.
There is also a casting process that is still relatively rarely used, that is, low pressure casting. It looks like it is similar to gravity casting, but the fact is the opposite, the low-pressure casting of the metal liquid is injected into the casting process in a full vacuum state, without the need to borrow any external force. Its types also have broad sense and narrow sense, such as broad pressure casting including pressure casting and vacuum casting, low pressure casting, centrifugal casting, etc.; Narrow pressure casting refers to metal type pressure casting, which is similar to gravity casting.
The principle of pressure casting is to rely on mechanical forces, such as injection rods, to pour liquid aluminum into the injection chamber, through the linear movement of the injection rod and the injection head to form pressure, forcing liquid aluminum to fill the mold. Pressure casting is generally used in parts that are complex in shape but simple inside (such as gear boxes, etc.).
