How does the precision casting valve body pull out the core?
Casting a large number of using the core, see you are using urea or water soluble core or core ceramic core, high water soluble wax.
What's the charge for that? Big belly is pumping out steel and low strength of urea ah, the difference in size especially looking at the surface is not pleasing to the eye, the direct use of the water soluble wax vigorously showed it, water solubility at room temperature.
Generally there are three ways: mold core pulling, block or use urea core, water soluble wax.
