Clay sand is a type (core) sand with clay (clay) as a binder. Because of its low cost, clay sand modeling is suitable for mass production.
So it is still used as the most important way of casting production. Clay sand, old sand, due to the thermal decomposition of various components during recycling, physical
Changes in performance, if used without regeneration, will make the quality of the sand unstable. According to statistics, 30 to 40% of the casting rejection rate is the quality of molding sand.
Therefore, the quality control of molding sand plays a very important role in the modeling of clay sand. With the current increasing requirements for castings,
The requirements are also getting higher and higher.