Die casting is abbreviated as die casting, which is a casting method in which a molten alloy liquid is poured into a pressure chamber, a cavity of a steel mold is filled at a high speed, and the alloy liquid is solidified under pressure to form a casting. The main features of die casting that distinguish it from other casting methods are high pressure and high speed.
(1) The molten metal fills the cavity under pressure and crystallizes and solidifies at a higher pressure. The common pressure is 15-100 MPa.
(2) The molten metal fills the cavity at a high speed, usually at 10-50 m/s, and some may exceed 80 m/s (the linear velocity through the ingate into the cavity - the gate speed), so the metal The filling time of the liquid is extremely short, and the cavity can be filled in about 0.01 to 0.2 seconds (depending on the size of the casting). Die casting machines, die-casting alloys and die-casting molds are the three major elements of die-casting production and are indispensable. The so-called die-casting process is to organically combine these three elements to enable stable, rhythmic and efficient production of qualified castings, even high-quality castings, with the appearance, good internal quality, dimensional conforming to drawings or agreements.