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Dongguan Precision CastingThe factory introduces its technological process to you:

With the advancement of science and technology and the vigorous development of the foundry industry, different casting methods have different mold preparation contents. Taking the widely used sand casting as an example, the preparation of the casting mold includes two major tasks: material preparation and modeling and core making.

Various raw materials used for modeling and core making in sand casting, such as raw casting sand, sand binder and other auxiliary materials, as well as molding sand, core sand, coatings prepared from them, are collectively referred to as modeling materials. The task of modeling materials preparation According to the requirements of the castings and the properties of the metal, the appropriate raw sand, binder and auxiliary materials are selected, and then they are mixed in a certain proportion into molding sand and core sand with certain properties. Commonly used sand mixers include roller type sand mixers, countercurrent sand mixers and continuous sand mixers. The latter is specially designed for mixing chemical self-hardening sand, continuous mixing and high sand mixing speed.

Modeling and core-making are carried out on the basis of determining the modeling method and preparing the modeling materials according to the requirements of the casting process. The accuracy of the casting and the economic effect of the entire production process mainly depend on this process. In many modern casting workshops, modeling and core making have been mechanized or automated. Commonly used sand moulding core making equipment include high, medium and low pressure moulding machines, air jet moulding machines, boxless injection moulding machines, cold core box core making machines and hot core box core making machines, coated sand core making machines, etc.

Dongguan Precision CastingAfter being taken out from the cast and cooled mold, there are gates, risers, metal burrs, and drape seams. The sand castings still adhere to the sand, so they must go through a cleaning process. The equipment for this kind of work includes polishing machine, shot blasting machine, pouring riser cutting machine and so on. The falling sand cleaning of sand castings is a process with poor working conditions. Therefore, when choosing a molding method, try to create convenient conditions for falling sand cleaning. Due to special requirements, some castings have to undergo post-casting treatments, such as heat treatment, shaping, anti-rust treatment, and rough machining.

After the casting is taken out from the pouring and cooling mold, there are gates, risers and metal burr drape seams. The sand castings still adhere to the sand, so they must go through the cleaning process. The equipment for this kind of work includes shot blasting machine, gate riser cutting machine and so on. The falling sand cleaning of sand castings is a process with poor working conditions. Therefore, when choosing a molding method, try to create convenient conditions for falling sand cleaning. Due to special requirements, some castings have to undergo post-casting treatments, such as heat treatment, shaping, anti-rust treatment, and rough machining.

Casting is a relatively economical method of forming blanks, and it can show its economic efficiency for parts with complex shapes. Such as the cylinder block and cylinder head of automobile engine, ship propeller and exquisite artwork. Some hard-to-cut parts, such as nickel-based alloy parts of gas turbines, cannot be formed without casting.

in addition,Precision cast steelThe size and weight of the cast parts are suitable for a wide range, and the types of metals are almost unlimited; while the parts have general mechanical properties, they also have comprehensive properties such as wear resistance, corrosion resistance, and shock absorption. They are other metal forming methods such as forging and rolling. , Welding, punching and so on. Therefore, the number and tonnage of blank parts produced by casting methods in the machine manufacturing industry are still the largest.

The materials often used in casting production include various metals, coke, wood, plastics, gas and liquid fuels, and modeling materials. The required equipment includes various furnaces for metal smelting, various sand mixers for sand mixing, various molding machines and core making machines for modeling and core making, and sand shakers and shot blasting machines for cleaning castings. Wait. There are also machinery and equipment for special casting, as well as many transportation and material handling equipment.

The production of Dongguan foundry has different characteristics from other processes, mainly due to wide adaptability, many materials and equipment required, and environmental pollution. Casting production will produce dust, harmful gases and noise that will pollute the environment, which is more serious than other mechanical manufacturing processes, and measures need to be taken to control it.

The development trend of casting products is to require castings to have better comprehensive performance, higher precision, less margin and smoother surface. In addition, energy-saving requirements and society's call for restoration of the natural environment are also increasing. In order to meet these requirements, new casting alloys will be developed, and new smelting processes and new equipment will appear accordingly.