10-04-2017, 08:44 PM
advantage and disadvantages of foundry sand
Let me briefly introduce the advantages and disadvantages of green sand casting process in China, and I hope it can be an interesting cast for buyers to learn more about the characters.
Advantages:
In China, a process of green sand molding is very common, and most iron foundries can produce iron castings for this process. Its mainly due to the benefits of this process.
1. Simple production process
The production process of green sand molding is a very simple comparison, so easy to manipulate. The materials are simple and easily accessible.
2. Lower production costs
Since the materials are simple and prices are relatively low, the production of green sand casting is low. Therefore, the green sand castings are less expensive than sand casting casting resin and casting shell. As for the current price of iron, you can visit to Dandong Foundry.
Third increase in production rate
The green sand casting process can achieve high production rates. The ground green sand casting can produce parts from 100 to 200 sand boxes every day, for example, about 100 pieces to 2000 pieces each day. The casting process automatic green sand can produce pieces with 20 tons daily.
In addition, the process of green sand casting can produce castings with unit weight of one hundred grams to several tons.
Disadvantages:
Disadvantages of the green sand casting process is also inevitable.
1. More casting defects
Green sand mold is a kind of downy mildew, but not as hard as the sand molds and casting resin shells. What more casting defects such as sand waste, holes in the sand, the air holes and withdrawals.
2. Quality of the rough surface
The surfaces of the casting process of green sand casting is very rough and thick. If iron foundries using green fine sand, rough surfaces, the better. However, there are some iron foundries that use of very fine sand sheets in China.
3rd Bad casting Dimensions
As the green sand is greater contraction, the dimensions are larger changes in the molding and casting time of cooing. Therefore, green sand casting process results in higher tolerances. Normally, you can get it CT10 and CT12 of dimensional tolerances.
4th Quality casting Unstable
The temperature has some influence on the quality of the process of sand casting, green corridor. Therefore, iron foundries to maintain the temperature well into the winter cold. Moreover, as the casting floor manual worker's skills are the key influence on the quality casting.