Stainless Steel Casting More Convenient Point
Sand in the production of stainless steel castings is very important in the selection and use of sand is also a certain requirement. Commonly used are the following:
Stainless steel casting production is the key part of the sand treatment part, Stainless Steel Casting as the name suggests is to deal with dry sand, choose these sand itself is less dust, the effect will naturally be good, especially the pearl sand, and even if there is no sand processing, artificial sand Dust, then it is relatively more convenient point. Stainless steel castings commonly used dry sand is generally washed quartz sand, sea sand, and sapphire sand, the size is generally 20 to 40 mesh, mainly based on its degree of fire resistance, Stainless Steel Casting that is, silicon content can not be less than 95%, then from him Of the permeability of the choice, the first two kinds of sand for the general casting, more economical.
Baozhu sand is artificial sand, the performance is better, more durable, but the price is four to five times higher than ordinary sand, one-time investment costs will be relatively large, but long-term use because of his low loss rate, regardless of the cost or Casting quality is better than ordinary casting sand.
In the casting industry of stainless steel castings, Stainless Steel Casting sand and trachoma are often encountered in the production of the problem, why is there such a problem?
In addition to improper sand, if the equipment used before there is not completely clean, or in the casting process of stainless steel casting, due to the pouring of the temperature is too high, molten iron scouring the wall of the sand, there will be sand and The problem of trachoma. At first, Stainless Steel Casting due to the requirements of this area is not strict, does not affect the use, so all manufacturers do not pay attention to such a problem, some manufacturers in order to alleviate this problem, usually is to use paint to solve, but because of this process More difficult, so it will lead to casting out of the castings will exist sand and trachoma phenomenon, Stainless Steel Casting greatly reducing the quality of the casting.
In order to solve the castings appear sand and trachoma problem? After continuous research found that as long as the use of special casting paint for the protection of the inner wall, you can greatly reduce the sand and trachoma problems, but also to improve the yield of castings also have a great effect.
Stainless steel castings in the long-term use, Stainless Steel Casting by the external environment, Diaoqi is a normal phenomenon, this time we have to paint.
1, first of all we should be prepared to repair the tools used: sandpaper, brush, paint or paint barrels, choose paint when you should try to choose anti-rust paint or polyester-type finish, but also to ensure that the stainless steel casting brush The number of times in more than twice. Stainless Steel Casting Need to rust the location of the rust spot with sandpaper polished clean.
2, the use of paint for the first time when the paint should be painted evenly, until the paint dry after a second painting, the second time should be used when brushing polyurethane paint,Stainless Steel Casting brushing time should be Try to ensure that the surface is smooth.
3, if the aging of stainless steel castings is more serious, should try to consider the replacement of new