What we can achieve by sand casting
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Description |
Molding by hand |
Molding by Auto Machines |
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Max size of casting |
1500mmx1000x500mm |
1000mm x 800mm x 500mm |
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Casting weight |
0.5kg to 1,000kg |
0.5kg to 1,000kg |
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Annual Capacity |
3,000 tons to 5,000 tons |
6,000 tons to 8,000 tons |
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Casting tolerance |
On request or standards |
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Molding Materials |
Green sands, resin coated sands |
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Casting metal& Alloys |
Grey iron, Ductile iron, carton steel Alloy steel,Brass…. |
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Step of sand casting Process
- Making pattern
Patterns made of goods, resin(plastics) or Aluminum can be used to produce during casting. But the Aluminum costs will be the highest and will be the most suitable process if you need thousands of castings with high dimensional tolerances and better surface quality.
- Molding process
The resin sand will be mixed by the sand treatment equipment, then shoot into the sand boxes. The molding workers will guarantee the sand can be filled to all positions, then make the sand as solid as possible.
- Self-hardening
After molding by workers, sand is still loose, then sand mold will be coated by a type of alcoholds based coating, after burning, the resin sand mold will become solid. This is why casting process is called as hard hold casting process.
- Melting and pouring
Just like sand casting process, medium frequency electrical furnaces are used to melt iron for sanding casting process.
- Sand blasting, cleaning and grinding
The shot blasting process is to remove the sand, oxides… then workers will cut of the gating systems, grind the gating and parting lines. Finally, the rough castings will be completed.
If the 2nd processes like machining are needed, these complete castings will be taken to the next steps.
