Vacuum casting machine TVCd series

overpressurefor jewelryfor dental applications

Pressure over Vacuum Casting Machine, Double Chamber TVCd is the pressure over vacuum casting machine designed to meet the more severe needs in lost wax casting production. This machine works with a new, revolutionary double chamber concept. This innovative system gives several advantages compared with the traditional single chamber suction system currently available in the market. In TVCd melting chamber and flask chamber are completely independent and at the moment of casting the machine can control the metal injection into the mold by applying a differential pressure during pouring. This yields to a faster injection compared to the simply gravity pouring with the benefit to cast items at lower temperature. This will result in better surface finishing of the cast parts and reduced shrinkage porosity. Moreover, thanks to the absence of residual gas in the mould, flasks can be filled even in counter-gravity mode, giving to our customers the chance to mount pieces upwards for a better tree yield and turbulence reduction. The casting cycle takes only few minutes and, while the previous flask is cooling down in protective gas for no oxidation, the next charge can be loaded into the crucible and melted, thus overlapping two cycles for no time waste. Moreover, the operator can decide to load the flask in the flask chamber when the alloy is already melted, just few seconds before casting. This leads to a low temperature drop in the flask and avoid excessive flask overheating to compensate this risk. The consumption of the graphite crucible is greatly reduced thanks to the gas washing process, which removes the oxygen within seconds from the charge being loaded.