Precision casting plays an important role in metal manufactures

Casting machining of the total mass in the general 40% to 80%, while manufacturing costs account for only 25% of the total cost of the machine to 30% 0 low cost because:

1. Production is flexible, mechanized mass production could be organized.

2. Can waste a lot of use of the old metal materials and renewable resources.

3. Compared with the forging of its small power consumption.

4. Have a certain size the precision, so that machining allowance, save processing time and metal materials. Foundry machinery manufacturing industry is rough and the main suppliers of parts, in the national economy occupies an extremely important position. Casting in the mechanical industry, the proportion of large goods, such as internal combustion engines are key parts casting, which account for 70% to 90%, casting quality vehicles account for 19% to 23%; machine tools, tractors, hydraulic pumps, valves and General machinery castings quality 65% to 80%; agricultural machinery castings. Quality accounted for 40% to 70% mining and metallurgy, energy, marine and aerospace industries of heavy, large, difficult equipment in both accounts for a large proportion of castings and play an important role.

Investment casting, also known as 'lost wax casting', usually in several layers of wax coated with refractory material, let it dry and harden, it will melt wax which is made to the shell, and then after baking, then pouring, obtained a method of casting, because casting obtained with high dimensional accuracy and surface finish, so called 'Investment Casting.' investment casting method can produce the alloy types are carbon steel, alloy steel, resistant heat alloy, stainless steel, precision alloy, permanent magnet alloy, bearing alloys, copper alloys, alCastings are generally more complex shapes, castings can be cast out of the smallest hole diameter 0.5mm, minimum wall thickness of casting 0.3mm. In the production of some of the original may be a combination of several component parts, by changing parts of the structure, designed to direct the overall parts cast from the casting out, to save processing time and the consumption of metallic materials, so that part structure is more reasonable.uminum, titanium, and iron and so on.


valve casting: http://www.fotaichina.com/products/p290.html