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Sand Casting Process And Breathability
Jul 21, 2017

  Sand Casting process and breathability

  Sand Casting In the process of processing its use of materials will usually be referred to as sand, which is mainly used for the manufacture of sand core molding materials known as the core sand, Sand Casting sand is mainly clay, water and the original sand effective According to a certain proportion of their mixture.

  The quality of the castings in the process of sand making is directly related to the quality of sand and core sand, mainly because if the quality of the molding sand is not good, this will directly lead to its processing of castings to produce its pores, sticky sand, sand , Trachoma and other defects.

  Sand Casting in the course of the use will have a good permeability, the high temperature metal liquid poured into the mold, the type will be filled with a lot of gas, in the course of the use of these gases must be successfully removed from the mold The performance of this type of sand that allows gas to pass through is known as breathability.

  Sand permeability will be directly affected by its clay content, moisture content, particle size and sand compactness and other factors, in the course of the use of its sand particle size is finer, the clay and moisture content will be higher.

  Sand Casting has a very high strength, the product must have its sufficient strength in the shape, handling and co-operation process will not appear in the collapse of the situation, the equipment from the casting time will not appear to destroy the surface of the mold.

  The strength of the sand should not be too high, otherwise it will be due to air permeability, the concession of the decline, so that casting defects, Sand Casting in use also has a certain fire resistance, high temperature metal liquid after casting the effective production of the mold Strong thermal effect, so the sand to have the ability to resist the role of high temperature heat resistance.