In order to shorten the mould making cycle and improve the market competitiveness, more and more mould enterprises adopt vacuum system technology. The application of vacuum system in casting mold is mainly used in large and medium-sized mold processing, such as automobile panel mold, die-casting mold, large plastic mold and other curved surface processing, and its curved surface processing accuracy can reach 0.01mm. Using vacuum system technology in production can greatly shorten the time of mould making. After high-speed milling and finishing, the mold surface can be used only with a little polishing, which saves a lot of grinding and polishing time. Increasing vacuum system is one of the key points of equipment investment in mould enterprises.
What is the principle of vacuum system for casting mould?
Casting mould refers to that in order to obtain the structural shape of the parts, other materials that are easy to form are used to make the structural shape of the parts in advance, and then the mould is placed in the sand mould, so a cavity with the same structural size as the parts is formed in the sand mould, and then the flowing liquid is poured in the cavity, after the liquid is cooled and solidified, the zero with the same shape and structure as the mould can be formed Yes. Casting mold is an important part of casting technology.
The working principle of the vacuum system is to start the system, the main vacuum pump group starts to work until the vacuum degree in the vacuum tank reaches the set upper limit value, the vacuum pump automatically stops running, and the vacuum in the central vacuum system is maintained by the vacuum check valve on the pipeline. If the vacuum degree in the vacuum tank drops and is lower than the set lower limit value due to work demand, the standby vacuum pump group will start automatically. Thus, the vacuum degree of the vacuum system can maintain a stable vacuum source and meet the production requirements.
Its application industry: Electrical Engineering, textile, CNC engraving machine, vacuum molding machine, folding machine, exposure machine, computer, semiconductor application, circuit board, battery, capacitor, binding machine, photographic plate making machine, refrigeration air conditioning process vacuum, packaging machine, transformer, optical lens, automatic injection, polyurethane process, label pasting machine, plate printer, circuit board machine vacuum elevator, vacuum Suction cup, printing machine, VCD & DVD disc surface vacuum splash plating, industrial furnace, smelting and heat treatment, metal vacuum coating, vacuum welding, electron beam welding, etc., vacuum coating, vacuum dry welding, vacuum packaging industry, space simulation, scientific research field, hospital negative pressure system, environmental protection industry, electronic industry, laboratory, plastic industry, general machinery, glass, marble, metal large V-type heavy goods vacuum handling and other industries.
When the vacuum system is used in the die casting machine for injection, the air in the cavity is quickly drawn out, so as to realize the vacuum die casting. Because of the short time of injection process, it is impossible to exhaust air by vacuum pump. The realization of this process depends on vacuum tank. The function of the vacuum pump is to exhaust the air in the vacuum tank and keep the vacuum tank at a high vacuum level. Then, at the moment of die casting, the control system turns on the switches of the vacuum tank and the cavity, so that the cavity vacuum can be realized quickly.
With the improvement of the quality requirements of the casting mould manufacturers, the vacuum system will be adopted by more and more enterprises. The vacuum system should not only draw the air out of the cavity, but also realize the functions of blowing, measuring, testing and data recording.
With the development of die casting industry, vacuum system is used by more and more die-casting manufacturers. Now, many manufacturers have higher and higher requirements for die casting. There are two advantages in the application of vacuum system in the casting mold. The first is to reduce the product porosity, so as to improve the product qualification rate. The second is to reduce the front pressure of liquid metal, which is conducive to filling molding.