Vacuum casting machine TVCd-XL series

overpressuredouble-chamberbottom pouring

Pressure over Vacuum Casting Machines TVCd-XL is a family of bottom pouring induction vacuum casting machines designed to meet the more severe needs in lost wax casting of ferrous and nonferrous alloys. They are often used in connection to a 3d printer for direct casting to get metal parts of complex objects. In TVCd-XL, melting of the metal takes place in a protective atmosphere (nitrogen, argon or forming gas) and a powerful vacuum pump is supplied to obtain the maximum suction effect in the mould chamber. The consumption of the graphite crucible is greatly reduced thanks to the gas washing process, which removes the oxygen within seconds of the charge being loaded. The heating system consists of a medium frequency induction generator, while the temperature is measured by a thermocouple with an accuracy of 1%. In addition, once the metal has entered the mould, compression is applied during solidification to reduce shrinkage porosity. Moreover, the operator can decide to load the flask in the flask chamber when the alloy is already melted, just few minutes before casting. This leads to a low temperature drop in the flask and avoid excessive flask overheating to compensate this risk. In case of challenging castings, this machine can also work with a new, revolutionary double chamber concept. In this working mode, melting chamber and flask chamber are completely independent and, at the moment of casting, the machine can control the metal injection into the flask by applying a differential pressure during pouring. This yields to a faster injection compared to the simple gravity pouring with the benefit to cast items at lower temperature.