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We produce iron components mainly by lost foam casting and sand casting process. But roughness of iron castings by lost foam casting or by quartz sand casting are not good enough. For some iron castings, we choose to produce them by precoated sand casting process.The roughness can reach about Ra12.5 to Ra6.3.
Investment casting process is suitable for almost all the ferrous and nonferrous materials.As a top investment casting foundry,Tongda foundry could make both ferrous and non ferrous investment castings for our customers.Now we would like to introduce what alloys can be poured in investment casting process
Phosphating treatment is widely used pretreatment technology, a kind of chemical layer converting process. Such process are mainly used as the surface treatment for steel castings and iron castings. Sometime, they are also used for the ferrous metal castings, such as aluminium die castings or zinc castings.
Letterings are widely required on investment castings made in Tongda foundry in China. Such letterings can help to indentify the investment castings, trace the quality of the investment castings. There're lots of lettering types on investment castings in China. Then, how to do the letterings on investment castings?
Lost wax cast tillage points made in Tongda foundry China are used to assemble the tillage agricultural machinery.
In modern society,agricultural machinery is becoming more and more important than before by development of science and technology .So some advanced agricultural machines like tractor,cultivator,chisel plow,subsoiler,air seeder,harvester,ect are made for production demands.However,most of the machines manufacture purchase parts from parts manufacturers.Thus Tongda foundy often make investment castings for agricultural parts dealers or machine manufactures.
