Performance requirements of molding sand powder raw materials (Qufu Longxiang Smelting and Casting Accessories Co., LTD.)

In order to better ensure the use of the product, its main production materials should meet the following performance requirements:

First, it has high strength and thermal stability to withstand various external forces and high temperatures.

Second, good mobility, that is, the ability of sand to move between sand particles under the action of external forces or gravity.

Third, a certain plasticity, that is, the ability of molding sand to deform under the action of external forces, and to maintain the given shape after the removal of external forces.

Fourth, better air permeability, that is, the ability of sand pores to pass through gas.

Fifth, high collapsibility, also known as sand production, that is, whether the molding sand is easy to destroy after the solidification of the casting, whether it is easy to clear from the casting performance. According to the binder used, molding sand can be divided into clay sand, water glass sand, cement sand, resin sand and so on. Clay sand, water glass sand and resin sand are used more.