The advantages of resin sand mold casting for bed castings:
1, resin sand mold rigidity is good, and the strength of sand mold is high at the initial stage of casting. This condition can make use of graphitization expansion of cast iron solidification process, effectively eliminate shrinkage porosity and shrinkage defects, and achieve less riser and riser casting of gray cast iron.
The production of polystyrene foam pattern 2, EPC, application of furan resin sand molding. When molten metal is poured into the mold, foam quickly in high temperature liquid metal under the action of gasification, combustion and disappear, the liquid metal instead of foam to occupy the position, solidified into solid casting with the same. The shape of the.
The principle of casting method selection for bed castings: bed casting is preferred by sand casting, mainly due to lower cost, simpler production process and shorter production cycle compared with other casting methods. When the wet type can not meet the requirements, the use of clay sand table dry sand type, dry sand type or other sand type can be considered. The casting method should be compatible with the production lot. Low pressure casting, die-casting, centrifugal casting and other casting methods are only suitable for mass production because of the high price of the mould and the mold, and the castings can be cast in single or batch production.
The casting methods of bed castings are usually made by lost foam casting, resin sand casting, solid mold casting, high grade casting and so on. For example, large bed casting castings, columns, beams, slider and so on are used in these casting processes.
Casting method for bed body casting
The commonly used casting methods for bed casting are sand casting, followed by special casting methods, such as metal casting, melt casting, gypsum casting and so on. And sand casting can be divided into clay sand, organic binder sand, resin self hard sand, vanishing mold and so on.
