What are the advantages of pressure casting?
Pressure casting is applicable to the following materials: tin, lead, zinc, aluminum, magnesium, copper alloy compression casting machine, weight of zinc alloy parts is about 70Kg, Aluminum Alloy parts weight 30Kg pressure casting production is very fast. The pressure casting Yali zhuzao pressure casting high pressure die casting [edit this paragraph], an overview of pressure (referred to as casting die casting) is the essence of under high pressure, the liquid or semi liquid metal filling velocity in high pressure mold cavity, and forming under pressure and solidification and casting method. 1, the characteristics of high pressure and high speed filling casting die is the two characteristic of die casting. It commonly used injection pressure from thousands to tens of thousands of kPa, even as high as 2 * 105kPa. filling rate is about 10~50m / s, sometimes even up to 100M / S. The filling time is very short, generally in the range of 0.01~0.2s. Compared with other casting methods Die casting, has the following three advantages: good quality products with high precision casting size 1., generally equivalent to 6~7, even up to 4; the surface finish, generally equivalent to 5~8; the hardness and strength of high strength than sand casting to improve 25~30%, but the elongation decreased about 70%; dimensional stability and interchangeability good; can die casting complex thin-wall castings. For example, the zinc alloy die castings minimum wall thickness can reach up to 0.5mm 0.3mm; Aluminum Alloy castings; minimum cast diameter is 0.7mm; the minimum pitch for 0.75mm.
2. high efficiency machine high productivity, such as domestic J III 3 type horizontal cold air machine an average of eight hours can die 600 ~ 700 times, small hot chamber die casting machine every eight hours can be 3000~7000 times of die casting; long life, a pair of pressing mould, die casting bell alloy, life of up to hundreds of thousands of times, even millions of times; easy to realize mechanization and 3.. The economic effect is good because the automatic die casting of precise size, smooth surface. The advantages of the pan general no longer machining and use directly or processing capacity is very small, so it improves the utilization rate of the metal, and reduce the processing equipment and a large number of working hours; the price of the casting is easy; can be used in combination with other metal or die casting non metal materials. Not only save assembly time and save metal die-casting. Although there are many advantages, but there are also some shortcomings, need to be solved. Such as: 1). Casting the liquid metal mould filling high speed, flow instability, so the use of a die casting, the casting is easy to produce pores, can not be heat treated 2). On the concave; complex casting, die casting is difficult; 3). High melting point alloys (such as copper, ferrous metal), die life is low; 4). For small batch production, the main reason is the high manufacturing cost of die casting mold, die casting machine High production efficiency, small batch production is not the economy.
2, the scope of application and development trend of die casting die casting is one of the most advanced metal forming technologies, is to achieve low chip, no effective way of chip, the application is very broad, is developing very quickly. The die casting alloy is no longer confined to non-ferrous metals, aluminum, magnesium and zinc copper, but also gradually expand to die casting iron and steel castings. The size and weight of die casting, power depends on the die casting machine. Because the power of die casting machine is increasing, the casting shape size from a few millimeters to 1 ~ 2m; the weight can be from a few grams to tens of kilograms. Overseas casting diameter is 2m, weight for aluminum casting 50kg. Die casting is no longer confined to the automotive industry and instrument industry, and gradually expand to other industries, such as agricultural machinery, machine tool industry, electronic industry, defense industry, computer, medical instruments, clocks, photo Machine and daily hardware and so on dozens of industries. In the die casting technology aspect, also appeared the vacuum die-casting, the oxygen die-casting, the fine speed, the close die casting as well as the soluble core application and so on new craft
