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Furan Resin Sand Castings

Dandong Foundry 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 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.

The 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.


ductile iron compressor shell

large belt pulley machined

large brake drum for trucks

large round manhole cover

elevator brackets

wrapping drum of winch

ash collector cone of boiler

bollard of dock

Resin Sand Casting Production Process
1. Making Pattern

Patterns are necessary tooling for making castings. All wooden patterns, resin (plastic) patterns and aluminum patterns could be used to produce resin sand castings. Aluminum patterns will be the most expensive ones, but they could be used to produce thousands of castings, and can guarantee higher dimensional tolerance and better surface quality.

2. Molding Process

The resin sand will be mixed by the sand treatment equipment, then shoot into the sand boxes (flasks). The molding workers will guarantee the sand can be filled to all positions, and make the sand as solid as possible.

3. Self-Hardening of Resin Sand Mold

After molding by workers, the sand is still loose. Then, the sand mold will be coated by a type of alcohols based coating, after burning, the resin sand mold will become very solid. This is why this casting process is called as hard mold casting process, also called as self-hardening sand mold. All good characters of this casting process are because of this hard mold.

3. Melting and Pouring

As same as green sand casting process, both medium frequency electrical furnaces and cupola furnaces could be used to melt irons for resin sand casting process.

4. Sand Blasting, Cleaning and Grinding

After the hot iron castings are taken out from sand molds, they will be sand blasted to remove the sand, then the workers will cut off the gating head, and grind the gating positions and parting lines. Finally, the rough castings will be completed.

If they need further machining and coating, then these rough castings will be taken to the machining or painting workshops.





Stove Burner | Cast Iron Plate | Manhole Cover | Brake Drum | Ductile Iron Belt Pulley | Cast Iron Flywheel | Boiler Ash Door | Stove Grate | Tractor Gearbox | Pump Body | Cast Iron Brackets | Gear Casting | Flange Castings | Cast Iron Axle Support | Truck Castings | Cast Iron Tractor Parts | Cast Iron Stove Parts | Boiler Soot Collector | Butterfly Valve Body | Cast Iron Manifold

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