For more information about this product Contact Us

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.

TECHNOLOGY and FEATURES

 Gas Purging Procedure

• Crucible loading operation introduces oxygen
• The Gas Purging procedure removes the oxygen with Argon, Nitrogen or forming gas.

 Melting 

• Advanced Self Tuning thermoregulation (AST™) with exact temperature control of the melted alloys
• Two Thermocouples Temperature Measurement: N-type. (up to 1250°C)          
  • One Thermocouple in the stopper
  • One Thermocouple inside the crucible wall
• On request the machine can be supplied with S-Type thermocouple (up to 1600°C)
• Medium frequency induction heating stirs the melted alloy and leads to a perfect homogeneity
• Pulse Stirring Management (PSM™) for an extremely low frequency stirring

Injection and Flow Control 

• When the stopper lifts up, it is very important to control the injection rate to increase consistency in grains dimensions
• TVC has the unique feature to have the injection rate controllable and programmable (IRC™)
• The metal exits the crucible with a narrow, constant and straight beam. Turbulences can be controlled and minimized acting on the program’s parameters.

Technical Specification

(Customized models are available on request with special features)

	TVC12d-GI	TVC20d-GI	TVC30d-GI	TVC25d-G	TVC35d-G	TVC45d-G	TVC60d-G
	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
Monitoring system
Water tank check before pouring
Oxygen Analyzer
Remote assistance
Main alloys	Based on Gold (Au), Silver (Ag), Copper (Cu); Brass, Bronze

 Provided -  Available on request