Summary of investment casting
Made from wax material shape, investment casting is also called the "lost wax casting". Investment casting is usually refers to the fusible materials, in the shape of several layer coated on the surface of refractory materials shell, and then look like melting discharge type shell, to obtain without the mold parting surface, after high temperature calcination can fill sand casting foundry. Widely used due to shape wax material to make, reason often called investment casting lost wax casting.
Available types of alloy investment casting method to produce carbon steel, alloy steel, heat-resistant alloy, stainless steel, precision alloy, magnetic alloy, bearing alloy, copper alloy, aluminum alloy, titanium alloy, ductile iron, etc.
The shape of the investment castings is more complex, generally can be cast out of the hole on the casting, the minimum diameter of 0.5 mm, castings, the minimum wall thickness of 0.3 mm. In production can be some parts which were made up by several parts, by changing the structure of the parts, direct design become integral parts and by investment casting cast out, in order to save processing time and the consumption of metal materials, make the parts structure is more reasonable.
Most of the weight of the investment castings for zero dozens of cattle (from a few grams to 10 kilograms, is generally not more than 25 kg), too heavy castings in investment casting method to produce more trouble.
Investment casting process is relatively complicated, and not easy to control, use and consumption of material is more expensive, so it is suitable for the production of complex shape, high accuracy, or hard to other processing of small parts, such as turbine engine blades, etc.