Vacuum casting machine TVCs series

overpressurefor jewelryfor ingots

Pressure Over Vacuum Casting Machine TVCs are fully automatic, robust, easy to use vacuum investment casting machines designed for small and medium sized laboratories. These machines operate on the well-known concept of "pressure over vacuum", using both flanged and non-flanged (and therefore cheaper) perforated cylinders. 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%. It is also possible to effectively mix the alloy during casting by means of medium frequency pulses, which are automatically managed by the control system. In addition, once the metal has entered the mould, compression is applied during solidification to reduce shrinkage porosity. The control panel is simple and intuitive, with just three keys for normal management of the melting cycle, while a 7-segment LCD display shows temperature and power. The machine runs an automatic cycle when the START button is pressed, and has eleven parameters for managing this cycle, so that the melting cycle can be customised according to the alloy used. Gas Wash Procedure • Crucible loading operation introduces oxygen