For the foundry industry, the phenomenon of weight error of cast iron plate castings is relatively common, but the consequences of different degrees of loss are different. If the weight error of cast iron plate cast iron exceeds 5%, the integrity of the cast iron plate will be caused.

1. There should be no rust, scratches, bumps and other appearance defects affecting the use on the working surface of the platform.

1. Gray cast iron: Most or all of the carbon in this cast iron exists in the form of flake graphite in a free state, its fracture is dark gray, has certain mechanical properties and good cutting performance, and is widely used in industry;

Improve the surface quality of scraping and grinding, take into account and check the shape and position error, and ensure the accuracy of the cast iron platform (the flatness of the cast iron plate should be below 0.01mm/500mm.

In order to make the cast iron machine tool work platform have the required mechanical, physical and chemical properties, in addition to the reasonable selection of materials and various forming processes, the tempering and aging treatment process is essential.

In order to prevent chemical sticking of sand, measures can be taken in the following two aspects: