What are the functions of film coated sand

What are the functions of film coated sand?

Film coated sand the development prospects of this industry is very good, because of the use of more benefits for the enterprise, so it is favoured by customers, in order to let you know more about it, the next we will talk about the role of film coated sand? I hope to bring help to more people.

Nowadays there are still many people for the film sand some basic information is not understood, so as a manufacturer, we are also necessary to briefly explain, in fact, the film sand is in the moulding of the sand surface covered with a layer of solid resin film of the type sand or core sand. There are two kinds of lamination process: cold method and hot method. Ordinary cold method with ethanol to dissolve the resin, in the sand mixing process to add the toppings, so that the two covered in the surface of the sand grains, ethanol volatilisation to get the coated sand; endothermic method is to preheat the sand to a certain temperature, add the resin to make it melt, stirring to make the resin? Coated on the surface of sand particles, add aqueous solution of tophin and lubricant, cooling, crushing, sieving that is, coated sand. It is used for cast steel parts and cast iron parts. The graphite powder used in this product is made of natural scale graphite with good lubrication, which is treated by purification process to improve its carbon content. And the melting point itself is very high. Especially after production and processing, it has higher high temperature resistance and better lubrication effect. The requirement of graphite powder for film coated sand is to be used as lubricant with good lubricating performance and high melting point.

Film coated sand can reduce the amount of resin added, reduce thermal expansion and improve heat resistance, which is the development trend of laminating sand technology. Reducing the amount of resin added means reducing the amount of gas produced by the coated sand and reducing costs, while reducing the expansion of the coated sand means improving the dimensional accuracy of the castings and reducing crack defects. The use also increases the heat resistance of the coated sand, which is very important to prevent the sand from adhering to the castings (especially steel castings) and to improve the surface quality of the castings. Spherical sand, due to its refractory, low thermal expansion, spherical shape and other characteristics, is the ideal casting sand for the production of overcoated sand, thus producing even better products. In addition, the overcoated sand and lubricant are formulated into overcoated sand through a specific coating process. When heated, the resin coated on the surface of the sand melts when used. Under the action of methylene glycol decomposed by tropine, the liquid resin is rapidly transformed from a linear structure to a non-molten structure, thus curing it. The company is committed to the expansion and development of domestic and foreign markets, the use of online Internet e-commerce platform and offline physical sales of two ways to go hand in hand. Nowadays are also make their products throughout the country's provinces, municipalities and autonomous regions, the products not only sell well in the domestic market, in the official website above the way to contact, here there are online customer service personnel to receive you, do not understand the problem like they ask on it.

The content of the above article is a small introduction to the role of the film sand some relevant information. If you don't know before then now you can take a look. The next issue will also tell you and its related knowledge. Remember to watch.