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Making Process And Fire Resistance Of Sand Casting
Jul 10, 2017

  Making process and fire resistance of Sand Casting

  Sand Casting in the process of production, its high-temperature metal liquid poured into the mold, its type will be filled with a lot of gas, these gases in the process of use must be smoothly discharged from the mold, such as sand This can let the gas through the performance of the air permeability, or its castings will produce a lot of its pores and inadequate casting defects.

  The permeability of sand casting can be affected to a certain extent by grit size, the content of water and the degree of clay content in the impact of factors, the finer the granularity of sand, its clay and water content will be higher, so that the higher the sand compaction degree, permeability is worse.

  Sand casting to a certain extent, the ability to resist the damage of its external forces become strength, the sand in the use of the process must have its high enough strength in modelling, handling and the process of the box does not cause collapse, in the pouring is also will not destroy its mold surface.

  Sand Casting in the production, the strength of the sand is not too high, or it will be because of its permeability and decline in yield, this will make castings have a certain defect, high-temperature metal liquid poured into the mold after the strong heat

  Sand Casting In the use of sand to have a certain resistance to high-temperature heat and fire resistance, in the use of such as the molding material of poor fire resistance and casting easy to produce sticky sand, the larger the type sand particles, the better the fire resistance.

  Sand Casting mainly refers to the deformation of sand in the external force, the entire product after the removal of its external force can be complete to maintain the shape of the ability to shape material plasticity, the entire modelling operation is very convenient. Made of sand shape accurate, clear outline.