Die casting, for short, is a casting method in which molten alloy liquid is poured into a pressing 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 of die casting different from other casting methods are high pressure and high speed.
(1) The liquid metal fills the cavity under pressure and crystallizes and solidifies under higher pressure. The common pressure is 15-100mpa.
(2) The filling time of liquid metal is very short, about 0.01-0.2 seconds (depending on the size of the casting), which can fill the cavity. Die casting machine, die-casting alloy and die-casting die are the three key elements of die-casting production. The so-called die casting process is to use these three elements organically and comprehensively, so as to stably and rhythmically and efficiently produce qualified castings with good appearance, internal quality, dimensions in line with the requirements of drawings or agreements, or even high-quality castings.