The characteristics of pressure casting
2023-06-08
Pressure casting, also known as die casting, is a casting method in which molten alloy liquid is poured into a pressure chamber to fill the cavity of a steel mold at high speed, and the alloy liquid solidifies under pressure to form a casting. The main characteristics that distinguish die-casting from other casting methods are high pressure and high speed.
① Metal liquid fills the mold cavity under pressure and crystallizes and solidifies at higher pressures, commonly ranging from 15-100 MPa.
② Metal liquid fills the mold cavity at high speed, usually between 10-50 meters per second, and some can even exceed 80 meters per second (the linear speed of the mold cavity introduced through the internal gate - the internal gate speed). Therefore, the filling time of the metal liquid is extremely short, about 0.01-0.2 seconds (depending on the size of the casting), and the mold cavity can be filled.
Die casting is a precision casting method that produces die castings with very small dimensional tolerances and high surface accuracy. In most cases, die castings can be assembled and applied without the need for turning, and threaded parts can also be directly cast. Small parts such as cameras, typewriters, electronic calculators, and decorations, as well as complex parts of transportation vehicles such as cars, motorcycles, and airplanes, are mostly manufactured using die casting.
