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Cost comparison of valve casting process

网站编辑:admin │ 发表时间:2018-05-29 

Casting is a metal thermal processing technology that has been mastered by humans for a long time. It has a history of about 6,000 years. Casting refers to a process in which a solid metal is melted into a liquid form and poured into a mold of a specific shape to be solidified and formed. The material of the valve mold is raw sand, clay, water glass, resin and other auxiliary materials. In the 20th century, the development of valve casting is very fast. One of the important factors is the advancement of valve product technology, which requires various mechanical and physical properties of castings to be better, while still having good machining performance. Another reason is the valve industry itself. The development has created favorable material conditions for the foundry industry. Let's talk about the way of valve casting process and cost comparison

Medium temperature wax precision casting is a silica sol shelling process, while low temperature wax is generally matched with a water glass shelling process! Medium temperature wax shrinks more than low temperature wax because low temperature wax paste contains water vapor. The low temperature wax is generally matched with the water glass shelling process! The shrinkage of the medium temperature wax is larger than that of the low temperature wax because the low temperature wax paste contains water vapor. What is the difference between medium temperature wax precision casting and low temperature wax casting?

1.The high temperature wax is combined with the silica sol shelling process, and the low temperature wax is generally combined with the water glass shelling process.

2.The shrinkage of the high temperature wax is greater than that of the low temperature wax because the low temperature wax paste contains moisture.

3.The shrinkage of the medium temperature wax is larger than that of the low temperature wax because the low temperature wax paste contains moisture.

4.The medium temperature wax is more stable than the low temperature wax and the price is expensive.