Advantages of Resin Coated Sand

 

The process of producing resin coated sand has several advantages over the traditional methods. The process of producing a resin coated sand does not require the use of expensive equipment. The sand is relatively inexpensive. It has high bending strength and is suited for many industrial applications. It is also suitable for the production of plastic and rubber products. However, some manufacturers may prefer a more natural or chemically derived sand.

The resin coating of sand allows the sand particles to be formed into various shapes. It also enhances their hardness. Besides that, it also reduces the possibility of the sand particles from being damaged by oxidation. RESIN COATED SAND makes the process of manufacturing plastic and rubber parts much easier and faster. It has excellent properties and is more durable than natural sand.

The resin coating process does produce small amounts of injurious gasses. The resin does not contain HMT, a component that is used in many other processes. The coating process also eliminates the need for ammonia and formaldehyde, which are commonly generated during the manufacture of resin coated sand. Moreover, the coating process does not require heat, which means it does not damage the sand.

The process of producing resin coated sand involves heating a sample of Sanei No. 6 silica sand to 130-140 degrees Celsius. The sand was then added to 140 parts of phenolic resin. The mixture was mixed thoroughly for 40 seconds. After mixing, 105 parts of water were added. The resin coated sand composition was crumbled and the sand was ready to be molded.

The process of producing RESIN COATED SAND uses a phenolic resin as the coating. This type of resin is a combination of novolac and resole resins. It contains an aromatic nitro compound, which provides a good lubrication. As a result, the resin is very hard and will not break down. During the process, it will create a porous layer of sand.

RESIN COATED SAND is an excellent method of casting a variety of parts. It has a high degree of precision and accuracy. In addition, it does not generate a large amount of ammonia or formaldehyde. The process requires the use of a shell molding process. This is the only method of resin coating sand in foundry practices. It is an ideal material for high precision casting.

The present invention further includes a lubricant for the sand. This lubricant is typically a novolac type phenolic resin. It is made by heating a granular sand in water to about 130 to 140 degree Celsius. Afterward, the sand is coated with a resin composition that contains a lubricant. In this way, the sand becomes a resin coated sand.