Introduction to sand casting materials and equipment

The sand foundry is a manufacturer that produces castings using green sand casting, coated sand casting, and furan resin sand casting as its main processes. There are also some sand foundries that classify V-method casting and lost foam casting into the general category of sand casting. The molding in sand foundries is generally divided into two categories: manual molding and automatic mechanical molding. Sand foundries play an important and fundamental role in modern equipment manufacturing. In almost every aspect of the industrial field, there are various castings produced by sand foundries. The castings produced by sand foundries account for more than 80% of all castings. With the continuous improvement of new technology levels and the continuous emergence of new materials and new technologies, the actual sand casting process in casting is also constantly improving.

Casting materials

There are many types of casting materials, among which molding materials are the most consumed, followed by other non-recyclable materials. The modeling materials in sand foundries mainly refer to raw sand, refractory materials, binders and coatings. These materials are primarily used in the manufacture of casting molds and sand cores.

Cast metal

Cast iron is the most commonly used metal material in sand casting. In actual casting, foundries generally smelt pig iron and required alloying elements in a certain ratio to obtain the required metal castings that meet the chemical composition. For ductile iron castings, attention should also be paid to whether the spheroidization rate of the castings can meet user requirements.

Casting technology and experience

Although the principles of sand casting are basically the same in different foundries, each foundry has different experience and different equipment. Therefore, in actual casting production, the specific steps and implementation methods are also different. Experienced casting engineers can save customers a lot of costs, and the scrap rate of castings produced under their guidance will also be greatly reduced.

Sand casting equipment

Sand foundries generally have dedicated casting machinery and equipment, including but not limited to sand mixers, sand treatment systems, dust collectors, molding machines, automatic molding production lines, core making machines, electric furnaces, cleaning machines, shot blasting machines, grinders, etc. and mechanical processing equipment. In addition, there are necessary testing equipment, including metallographic testing instruments, spectrum analyzers, hardness testers, mechanical property testers, vernier calipers, three-coordinate scanners, etc. are all indispensable.