Resin Sand Casting
Some clients asked me about the resin sand
casting in the past, so herein, I made a brief introduction for its
definition and characters, and hope these information could be
helpful for the buyers to choose the suitable casting process.
What is resin sand casting?
Resin sand casting process is a kind of
floor molding process by using the resin sand as the
molding material. Resin sand is a kind of mixture of quartz sand and
resin. After mixing and burning, the resin sand could become very
hard and solid, so we called it as the hard mold. The iron casting
made by resin sand will be usually called as resin sand casting.
What is the character of resin sand casting?
Since resin sand mold is very hard and solid, and it has smooth
surfaces, so the resin sand casting has more accurate dimensions and
better surface smoothness, and less sand residual and
casting defects on
the surfaces and inside.
What kind of castings are suitable for resin sand
Because the resin sand is expensive, and lower production rate than
green sand casting process,
so it is more suitable to produce larger iron castings, such as the
castings with weight from dozens of kilograms to several tons. By
the way, resin sand casting process is not suitable to produce steel
castings since steel castings need higher air permeability.
What is the disadvantage of resin sand casting
One disadvantage is the low production rate. Since the resin sand
needs to be mixed and burning, it needs more production time.
Another is the high production costs. The resin price is increasing
largely by the end of 2010 because of the flood in northern China.
Moreover, the prices of the related materials such as paints are
also increasing. So, the resin sand casting became more and more
expensive than before.
The followings are some of resin sand castings made by
Dandong Foundry in
China. Although the resin sand casting has become more expensive,
the buyers are still choosing it because of its good characters.