This shows that the use of investment casting method

Castings are generally more complex shapes, castings can be cast out of the smallest hole diameter 0.5mm, minimum wall  Wholesale 6806 Bearing 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. Castings are mostly zero scores of cattle weight, heavy casting with investment casting method of production is a bit trickier, but producing the castings the weight of the cattle reached approximately 800.

Casting process, it simply is made of refractory materials in easily melt Xing Ke model on top of which a number of Ceng special De refractory coating paint, after drying and hardening Xing Cheng 1 Zheng Ti type Kehou, then steam or hot water from the type melting of the shell model, and then placed in sand box shell, filled with dry sand in the molding around it, and finally cast into the roaster in the high temperature roasting, mold or shell after roasting, after which pouring molten metal and be cast. High dimensional accuracy of castings, generally up to CT4 ~ 6, of course, the process as the process of casting complex factors that affect the size precision casting more materials such as mold shrinkage, melting mode of deformation, and shell in the heat amount of cooling process in the line changes, the alloy solidification shrinkage and deformation of the casting process, so the size of ordinary investment castings precision are higher, but still need to improve their consistency.

Suppression of melting mode, the cavity surface finish using high-pressure type, therefore, melting mold surface finish is relatively high. In addition, a special shell from the high temperature binder and refractory material made into a fire-resistant coating Coating in Investment Scales and made direct contact with the molten metal surface finish cavity high. Therefore, Investment Castings Casting surface finish than the average high, generally up to Ra.1.6 ~ 3.2μm. Casting of the biggest advantages is that because castings have a high dimensional accuracy and surface finish, it can reduce the machining work, only in part on the demanding part of machining allowance can stay a little, and even some of the cast only stay grinding, polishing margin, can be used without machining.

This shows that the use of investment casting method can save a lot of machine tool equipment and processing time, a substantial savings of metal materials. Another casting method of the advantages is that it can cast a variety of complex alloy castings, in particular, can be made into high-temperature alloy castings. Such as jet engine blades, its sleek profile and cooling outside the cavity, with the machining process almost impossible. With the production of investment casting process can be done not only to mass production, ensures consistency of the casting and machining to avoid the knife after the patte of residual stress concentration.