In the casting process, powder weight water is a very simple operation, general newtalent, and the weighing device is simple, the water powder ratio vary greatly
According to the casting powder water ratio requirements, made a comparative experiment:
The first group: 1 accurate weighing casting powder. Method: ordinary kg said
2 accurate weighing water (not cleaning), method: ordinary kg said (water powder ratio 38%)
3 according to the casting powder brand operation
Results: the casting surface smooth, no cloak, non slip, no black spots
Second group: 1 accurate weighing casting powder. Method: ordinary kg said
2 manufacturers actual operation: the amount of water, methods: plastic cup (1000 mlper 50 square scale,)
3 according to the casting powder brand operation
Results: the relatively rough surface, burr, a small amount of water slide, there are spots on the tree
You can see the quantity of water that casting is completely different. Add more water,which reduces the strength of casting powder, prone to surface roughness and Cape,water less, also reduce the strength, the lattice is not fine, reduced permeability,baking process, the expansion of the water so that the surface is damaged, the high temperature, the porosity low carbon, so difficult to gasification, formation of carbonresidue
Improving the casting quality, don’t ignore the simple things! Accurately call water and water is a prerequisite to improve casting quality