(3) mouldingA. wax mould temperature, its effect on free contraction ratio to grand to rate the influence of the blocked squeeze.B. for investment in the process of storage and will further austerity, 10% as usual.But for 12 hours later, its size is not changed fundamentally.C. wax mould pressure, pressure maintaining time will affect, but didn't shoot the influence of the temperature of wax.(4) shell makingThe material of the shell making used when tensions have zircon sand, zircon powder, shop on the sand, but because of its small expansion coefficient, so that on the one hand, can be careless.(5) roastingBecause the shell expansion coefficient is small, in this aspect is also can be careless.
cessing equipment.