We all know one of the most important standard of investment casting quality is the hardness.The hardness value of investment castings will be a factor that affects machining of investment castings.

Tongda is a casting factory mainly custom investment castings for customers all over the world.We are a top investment casting foundry located in Ningbo,China.Our management idea is to help our customers to buy cheap investment castings from China on the basis of good quality.Today we would like to ......

Tongda casts investment castings as parts of packing machine in China.  Nowadays, lots of things require for packing. Some require for basic packing. Some require for beautiful packing. To meet such packing requirements, the equipment factory making various of packing machinery. We've worked with s......

Complex parts of forging remold, no cutting and high surface finish,high precision,which are difficult to machine,created a broad application prospect for investment casting process.However,products of military and aerospace industry have high demands on the surface quality,dimensions of investment ......

Welding repairing is widely used process for repairing investment castings.

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 machine......