If secondary processes like machining or surface treatment are needed, these complete castings will be taken to the next workshops. Finally, the rough castings will be completed. Sand Blasting, Cleaning and Grinding. The shot blasting process is to remove the sand and oxides outsite of the sand casting parts, then the workers will cut off the gating systems, and grind the gating positions and parting lines.Melting and Pouring. Just like the sand casting process, medium frequency electrical furnaces are used to melt irons for resin sand casting process.This is why this casting process is called as hard mold casting process, also called as self-hardening sand mold. Then, the sand mold will be coated by a type of alcohols based coating, after burning, the resin sand mold will become very solid. After molding by workers, the sand is still loose. Family owned since 1912, we ensure tightly controlled metallurgy for production, prototype &. The molding workers will guarantee the sand can be filled to all positions, and make the sand as solid as possible. OK Foundry offers highly flexible gray and ductile iron castings. Sand Casting Molding Process.The resin sand will be mixed by the sand treatment equipment, then shoot into the sand boxes (flasks).Generally, the costs of the aluminum patterns will be the highest, but it is the most suitable process if the customers need thousands of sand castings with higher dimensional tolerances and better surface quality. Making Pattern.Patterns made of wood, resin (plastic) or aluminium could be used to produce during the sand casting.Annual Capacity of Sand Castings: 8,000 tons - 10,000 tons.Max Size of Casting Molds: 1,000 mm × 800 mm × 500 mm.▶ Capabilities of Sand Casting by Automatic Molding Machines: Casting Tolerances: On Request or According to ISO 8062.Annual Capacity of Sand Castings: 5,000 tons - 6,000 tons.
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