OTTOMMO CASTING

Sand casting is a process, which is made use of to make or make big parts and equipment constructed out of brass, lightweight aluminum, iron and bronze. The steel is first thawed and afterwards carefully poured into a mould, which is composed of sand.

The cavity in the sand is made in the following method. The desired pattern is made that is of timber or resin in whatever shapes that the sand wheel wants the part to end up. In uncommon instances, the pattern may be made of metal. This pattern is placed in a cavity in the sand. The cavity is usually housed in a flask which is box like. The pattern is then packed into the moist sand. The sand retains the shape of the pattern when it is removed from the box. The person making the sand cast also will create a reservoir called a riser into which excess molten metal can flow. A second mold is made for the upper part of the sand cast in a similar way.

As a cost-efficient casting method, sand casting is still popular in China. Basically, it refers to make a sand mold with cavity of casting shape inside. Then, we get the casing after pouring metal into the cavity and metal solidifies. In sand casting plant, we have both manual and semi-automatic sand casting production lines for castings with various size, weight and geometries. Besides, our sand casting capacity ranges from 3 lbs. to 2500 lbs.

Green Sand Molding Process: This is the most cost-efficient method. In this process, granular refractory sand is coated with a mixture of betonies clay, water. We use resin or aluminum patterns to form the cavity. However, the surface roughness and tolerance on green sand molding are not as good as resin sand molding process.

Resin Sand Molding Process: We also call this process as resin-bonded sand molding method. Because of the resin-bonded sand, the sand mold is harder than green sand molding. Additional burning of coated sand will make the sand mold solid. This creates a good surface and tight tolerance for the casting. However, this process will take more time and cost more than regular green sand molding.

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