What is resin sand casting?

Furan resin sand is one of the fastest growing casting processes of the last 20 years,Resin sand is a generic term, in the moulding, core before the surface of the sand grain has been covered with a solid resin film sand, core sand is called film sand, also known as shell core sand, it is the first thermosetting resin sand, invented by the German Dr. CRONING in 1944. Resin sand casting is the mixing of raw sand and resin to form resin sand, which is then punched into the cavity of the mould.

The resin sand is then punched into the mould cavity and shaped by heating or catalyst, and then placed into the casting mould for casting.

The application and origin of resin sand at my factory?
Resin sand is widely used in pump valves, shells, machine tool parts, aviation and other fields, the technology mainly originated from Japan, the United States and other developed countries, our foundry quickly mastered the resin sand technology in 1950.
With the introduction of three automated resin sand production lines, capable of producing parts ranging from 70kg to 400kg, we have not only reduced lead times, but also reduced casting prices. Only the mould costs are higher than with the traditional resin sand process,If we have a large number of orders, I would recommend an automated casting line.

What kind of castings are suitable for resin sand casting process?
Resin sand is mainly used for parts with a large weight, according to our casting experience, after most parts weigh more than 40kg, we will have to choose the resin sand process to produce.

What is the advantages of resin sand casting process?
1. High dimensional accuracy of the casting, clear external contours and a clean casting surface.
2. Elimination of the drying step, high production efficiency and shortened production cycle.

Dandong Iron Casting Group produces Gray Iron and Ductile Iron castings by furan resin sand casting process. Furan resin sand is a kind of self-hardening sand. After burning of coating, the surface of the sand mold will become solid, very hard.Therefore, this  furan resin sand process could be used to produce middle and large size of iron castings, from dozens of kilograms to dozens of tons. Max. 100 tons per piece is possible.Advantages of this casting process will be good surface quality, less casting defects, could be used to produce complex castings and good dimensional tolerance.

The disadvantages will be high production costs, so caused high casting prices, low production rate, so not suitable to produce small iron castings. Moreover, this casting process can not be used to produce steel castings, because of its poor gas permeability.