Which parts are suitable for investment casting?

Investment Casting is usually made of investment molding materials (materials with low melting point, such as wax, etc.) to form a mold, and then several layers of refractory materials are coated on the surface of the mold. After hardening, drying and curing, the mold is heated to melt out the mold to form a hollow shell, and metal liquid is poured after sintering at high temperature.

 

Investment casting for the following applications:

1. Parts weight between 200g~50kg

Although investment casting can also form large castings, it is more suitable for forming small and medium-sized castings. On the one hand, when the casting is too large, the dimensional accuracy is difficult to ensure; On the other hand, mold costs and processing costs will be relatively high. Sand casting is a better choice for large castings.Investment casting is more ideal when forming small parts, dimensional accuracy is easier to ensure, and the cost is affordable.

 

2. Medium and large volume production

Investment casting first needs to process wax molds and other tooling fixtures, which requires a certain investment in fixed assets, so it is more suitable for medium and large volume production.

3. When the dimensional accuracy is required

Relative to other casting processes, the dimensional accuracy of investment casting is the highest.

 

4. Need to reduce and remove machining

Because of the high dimensional accuracy and good surface finish of investment casting, investment casting can remove machining, even if machining is

required, the workload of machining is less than other casting processes.

 

5. When the internal structure of the parts is complex

When the internal structure of the part is complex, investment casting may be the best choice. Investment casting can form extremely complex parts because there is no demudding problem in investment casting, and the mold used to pour molten metal is ceramic, which can easily fall off when cooled and solidified. Through creative molds, soluble wax cores, or ceramic cores, the internal structure of the wax mold that is coated to form a ceramic shell can be easily obtained. Therefore, there are no restrictions on the internal details of the part in investment casting.