1. After the first sand blasting and natural air drying of the water ring vacuum pump, industrial glue (silica slurry) is continued on the surface of the wax mould and the second layer of sand is sprayed. The size of the second layer of sand particles is larger and thicker than that of the previous first layer of sand. After the second layer of sand is sprayed by the water ring vacuum pump, the wax mould is also air-dried naturally at a set constant temperature.
2. After the second sand blasting and natural air drying of the water ring vacuum pump, the third sand blasting, the fourth sand blasting and the fifth sand blasting are carried out in turn. Requirement:
(1) According to the product surface requirements, volume, self-weight and other corresponding adjustments of the number of sand blasting. In general, the number of sand blasting is 3-7 times.
(2) The size of sand grains is different in each sand blasting process. Generally, the sand grains in the later process are thicker than those in the previous process, and the time of air drying is also different. Generally, a complete production cycle of sand on wax mould is about 3 to 4 days.
Above is some knowledge about water ring vacuum pump sand blasting process, you can refer to it. Today's content is introduced here, hope to help you, want to know more knowledge can continue to pay attention to us.
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