Precision casting is a casting method compared with traditional casting technology. It can obtain relatively accurate shape and high casting accuracy. The common practice is to make the electrode of the required blank first (with little or no allowance), and then etch the mold body with the electrode to form the cavity. Then the wax is cast out by casting to get the original wax model. Brush high-temperature resistant liquid sand on the wax mold layer by layer. After getting enough thickness, air drying, and then heating, so that the inside of the wax mold melts, and the cavity consistent with the required blank is obtained. Then cast molten iron in the cavity, and peel off the shell after solidification, and you can get the finished product of precision manufacturing! ! !
Characteristics and advantages of precision casting;
Investment casting, also known as investment casting, has the following characteristics compared with other casting methods and parts forming methods:
1. castings have high dimensional accuracy and good surface roughness. The dimensional accuracy of the casting can reach 4-6 grades, and the surface roughness can reach 0.4-3.2 microns, which can greatly reduce the machining allowance of the casting, realize the manufacture without allowance and reduce the production cost.
2. Castings with complex shapes and difficult to process by other methods can be cast. The overall size of the casting is as small as several millimeters to several thousand millimeters, the thinnest wall is 0.5 millimeters thick, and the minimum aperture is below 1.0 millimeters.
3. Alloy materials are not limited: carbon steel, stainless steel, alloy steel, copper alloy, aluminum alloy, superalloy, titanium alloy, precious metal and other materials can be produced by precision casting, especially for alloy materials that are difficult to forge, weld and cut.
4. High production flexibility and adaptability. Can be used for mass production, small batch production and even single piece production.
To sum up, precision casting has the advantages of small investment scale, large production capacity, low production cost, simplified complex product technology and quick investment, so it is in a favorable position in the competition with other technologies and production methods and has broad prospects.