Topcast TVCd-G furnaces are used to produce oxygen free and homogenous alloy grains, starting from raw material molten by induction heating in a protective atmosphere, obtained by inert gas purging cycles, and then poured into a water / alcohol tank passing through a multi-hollowed crucible that acts as flow breaker.
Melting and pouring phases are protected by inert gas, which can be chosen between Argon, Nitrogen or Forming Gas.
The induction generator is designed to allow the homogenization of the alloy thanks to the stirring effect of the magnetic field which works while the metal is being melted in the crucible.
Water in the tank is continuously circulating and it is cooled by a powerful chiller to keep the process variables under control and obtaining consistency and quality in the produced grains.
The granulator is provided with a heat-exchanger, filters and water pump to separate the process water from the cooling water.
After granulation, a two valves interlock system allows for grains recovery while the process water remains in the process chamber.
This avoids to transfer the process water to a back-up tank after pouring for then re-transfer back the same to the process tank after filtering the water from the grains.
These grains will be finally placed in a resistors heated centrifugal drier to remove humidity.
The machine is fully automatic having a countless number of programs for every kind of alloy.
The control logic is provided with a PC based data acquisition system aimed to sample the process variables with reporting function after every casting cycle.
Data can be display in graphic format or exported to external PC for analysis.
The furnace can be provided with an Oxygen analyzer to control and monitor the oxygen content present in the melting chamber during the cycle.
In the TVCd-GI series instead, the recovery of the grains is simplified and takes place through a metallic filter present in the granulation chamber.
A highly automated plant can be provided for granulation, including automatic drying, sieving, dosing, weighting and grains packaging in a key-in-hands philosophy commissioning.
|top grain recovery||bottom grain recovery / added features|
|Crucible volume||500 cc||2-3 liters||4-7 liters||2-3 liters||4 liters||7 liters||20 liters|
|Crucible working capacity||3 kg Bronze||9 -18 kg Bronze||24 -42 kg Bronze||9 -18 kg Bronze||24 kg Bronze||42 kg Bronze||100 kg Bronze|
|7 kg Gold||17 -30 kg Gold||56 -100 kg Gold||17 -30 kg Gold||56 kg Gold||100 kg Gold||230 kg Gold|
|Induction Power||12 kW||20 kW||30 kW||25 kW||35 kW||45 kW||60 kW|
|inert Gas (Ar, N2, N2/H2 - forming gas)|
|Maximum temperature||1250°C / 1600°C|
|Autotest with data report|
|Water tank check before pouring|
|Main alloys||Based on Gold (Au), Silver (Ag), Copper (Cu); Brass, Bronze|