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Please introduce the Melt mold casting！
When the wax is used as a sample, the molten casting is also called "lost wax casting". Investment casting is usually made in the shape of fusible materials, in the appearance of refractory material is coated on the surface of several layers made of shell, the appearance of melt discharge type shell, resulting in no parting surface mold, the casting solution after calcination can fill sand casting. Because of the wide use of wax material to make, it is often called "dewaxing casting".
The alloy produced by investment casting is composed of carbon steel, alloy steel, heat-resistant alloy, stainless steel, precision alloy, permanent magnet alloy, bearing alloy, copper alloy, aluminum alloy, titanium alloy and ductile iron.
Advantage：
The precision of size is high. Generally, CT4-6 (sand casting is CT10~13, die casting is CT5~7)
It can improve the utilization of metal materials. Investment casting can significantly reduce the product forming surface and the surface with the amount of processing
The similarity between the blank and the parts can be improved to a great extent, which is very convenient for the structural design of the parts. Casting castings with complex shape casting can cast a very complex shape of the casting can also cast a wall thickness of 0.5mm, weight as small as 1g casting, casting can also be combined, overall casting
It is not limited by the alloy material. Investment casting can cast carbon steel, alloy steel, ductile iron, copper alloy and aluminum alloy castings, and can also cast castings of superalloys, magnesium alloys, titanium alloys and precious metals. For hard forged, welded, and machined alloy materials, it is especially suitable for casting by casting.
High flexibility and adaptable casting are suitable for mass production, small batch production and even single piece production.
Shortcomings and limitations:
The size of the castings can not be too large, and the cooling rate of the complex castings is slow. Casting in all forming method, the most complex process, the casting cost is also very high, but if the product is properly selected, parts of reasonable design, high casting cost compensated due to reduction of machining, assembly and metal material saving, while investment casting has a good economy.