High-pressure casting & nbsp;& nbsp;& nbsp; Pressure casting refers to the casting method in which molten metal is filled at high speed under high pressure and solidifies under pressure. The commonly used injection ratio is 5-150Mpa, the filling speed is about 0.5-500m/s, and the filling time is 0.01-0.2s.1. Die casting machine and die casting process  & nbsp; Die casting machines are the main equipment for pressure casting production. The press chamber (injection chamber) is generally divided into two categories: hot press chamber die casting machines (the pressure chamber is immersed in metal liquid) and cold press chamber die casting machines (the pressure chamber is separated from the metal liquid insulation furnace).  & nbsp; At present, the most widely used is the horizontal cold pressing chamber die-casting machine. This type of die-casting machine is mainly composed of a clamping mechanism, a injection mechanism, a power system, and a control system. The clamping mechanism is used for opening and closing die-casting molds and fastening die-casting molds. Die-casting molds are metal molds used during die-casting, consisting of fixed and movable parts. The fixed parts are fixed on the frame, and the movable parts are driven by the clamping mechanism to move horizontally. The die-casting mold is usually equipped with a mechanism for pulling out the core and ejecting the casting. The die-casting process of the horizontal cold chamber die-casting machine is shown in the animation, mainly including spraying paint into the mold cavity, molding, pouring molten metal, injecting metal, maintaining pressure, opening the die-casting mold after condensation, and ejecting the casting.Animation Demonstration of the Working Process of a Cold Chamber Horizontal Die Casting Machine & nbsp;2. Characteristics and Applications of Pressure CastingThe main feature of pressure casting is that the castings are formed under high pressure and high speed. Compared with other casting methods, pressure casting has the following advantages:(1) Advantages:1) The productivity is higher than other casting methods, reaching 50-500 times/h, and the operation is simple and easy to achieve automation.2) The casting has good quality and high dimensional accuracy. Die castings generally do not require cutting processing and can be directly assembled for use.3) It can produce thin-walled castings with complex shapes, and can directly cast fine holes, threads, tooth shapes, patterns, characters, etc. It can also cast embedded parts.4) The strength and surface hardness of die castings are relatively high, and the tensile strength is increased by 20% to 40% compared to sand castings.  & nbsp; However, the investment in pressure casting equipment is high, the cost of die-casting molds is high, and the production cycle is long, making it only suitable for mass production. Due to the filling of molten metal at high speeds, it is difficult to expel gas from the mold. Small pores often exist below the skin in die castings. Therefore, large machining allowances are not allowed in die castings to prevent the exposure of pores, and it is not advisable to conduct heat treatment or work at high temperatures to prevent gas expansion and surface protrusion or deformation of the castings.(2) Application: Mainly used for large-scale production of medium and small castings of non-ferrous metals and alloys such as aluminum, zinc, magnesium, copper, etc. It is widely used in sectors such as automobiles, tractors, instruments, medical devices, daily hardware, and national defense industry, such as engine cylinder blocks, cylinder heads, boxes, instrument housings and brackets, gears, motor rotors, etc.