YunXi environment friendly molding sand has been successfully used in sand casting process, it can effectively reduce burning-on, scab, sand inclusion, blowhole and other defects. It helps to improve the internal quality and visual quality of casting. YunXi environment friendly molding sand casting process has comprehensive advantages of environment friendly, economic, high-quality and high-efficient. A series of experiments are carried out, which helps to further understand the characteristics of YunXi environment friendly molding sand and the effects of molding sand performance on the casting defects and casting quality. The wet compressive strength, permeability, hot wet tensile strength, gas evolution, thermal expansion, hot pressing strength, high temperature form transformation, differential scanning calorimetry-Thermogravimetric analysis(DSC-TG) curve of YunXi environment friendly molding sand are systematically studied, and which are compared with that of the conventional coal sand. The result shows that the wet compressive strength, permeability, thermal expansion of YunXi environment friendly molding sand are similar with coal sand, but the hot wet tensile strength, hot pressing strength, gas evolution of YunXi environment friendly molding sand are far superior to that of coal sand. These advantages can effectively reduce the casting defects, and ensure the quality of the casting. Research work can helps to further improve the casting quality and further promote the production process of green casting.
ZHU Shigen
,
TAO Liyang
,
LUO Yilan
,
DING Hao
. Study on the Performance of YunXi Environment Friendly Molding Sand[J]. Journal of Mechanical Engineering, 2016
, 52(6)
: 92
-98
.
DOI: 10.3901/JME.2016.06.092
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