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Casting, Forging & Moulding Machines

We offer the best product range of Vacuum Casting MachinesTVCS and Pressure over Vacuum Casting Machine.

Vacuum Casting MachinesTVCS


TVCs are fully automatic, robust, easy to use pressure over vacuum casting machines designed for small and medium casting laboratories.


This family of machines work with the well known pressure over vacuum concept, thus preferring the perforated flask against the solid ones. Melting is achieved in protective atmosphere (Nitrogen, Argon or Helium) while a strong vacuum pump is provided in order to boost the suction effect into the mould. As soon as the metal has entered the mould a strong compression takes place on top of the tree to reduce shrinkage porosity.




Flask size can reach up to 300mm in height and 160mm in diameter. Crucible graphite consumption is greatly reduced thanks to the gaswash procedure which removes the oxygen in few seconds from the charge loading operation. The machine is fully automatic making the operator’s job very easy (you simply have to load the alloy and flask and then press the START button). This will give you the most consistent result flask to flask.


And remember, meanwhile the machine is running the cycle, you can do other important jobs in your factory. Having a consistent, robust and easy to use machine in your factory is the key factor for a reliable casting production.




Gas Wash Procedure

  • Crucible loading operation introduces oxygen

  • The Gas Wash Purge procedure removes the oxygen (1) in a very fast and efficient way and then refills back the chambers with Argon or Helium gas (2)

  • Compared with the traditional crucible protection with flow-meter regulation the consumption of gas is dramatically reduced and the alloys oxidation is minimized

  • Moreover the crucible life is increased: TVC series crucible last up to 250 – 400 casting cycles according to the graphite quality






Melting

  • Advanced Self Tuning thermoregulation (ASTTM) with exact temperature control of the melted alloys

  • Medium frequency induction heating stirs the melted alloy and leads to a perfect homogeneity

  • Pulse Stirring Management (PSMTM) for an extremely low frequency stirring






Injection and Compression

  • When the stopper opens, as soon as the molten metal fills the flask, a trigger is launched to the over pressure valve which will make the gas flow enter smoothly and quickly to compress the tree during the solidification phase to reduce shrinkage porosity.






Tree protection after casting

  • After the solidification phase, the flask cools down in a protective atmosphere to avoid oxidation.

  • A blinking lamp will signal the operator that the cycle has ended and the flask can be removed




  •  
    TVC3s TVC4s TVC10s TVC10s - A
    Application Small Labs Entry Level Model Medium Labs Brass Foundries
    Number od casting programs 1 1 8 8
    Working Capacity of graphite crucible 1 kg Au, 0.5 kg Ag 2 kg Au, 1 kg Ag 3 kg Au, 1.5 kg Ag 2.5 kg Brass
    Flask maximum diameter(mm) Ø150 Ø150 Ø150 Ø150
    FLask maximum height(mm) 280 280 280 280
    Induction power 3 kW 4 kW 10 kW 10 kW
    Vacuum pump External External External External
    Pressure over vacuum 2 bar 2 bar 3 bar 3 bar
    Max. temperature 1400 °C 1400 °C 1400 °C 1400 °C
    Shot maker  
    Autotest with data report
    Monitoring system for data acquisition
    Flask check before casting
    Vacuum leakage detector
    Oxygen Analyzer
    RS232 remote interface
    Main alloys Gold (Au), Silver (Ag), Copper (Cu), Brass, Bronze, Aluminium (Al) and their alloys
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Pressure over Vacuum Casting Machine

  •   TVC3d
  • Number of casting programs 100
  • Crucible working capacity 200g Bronze 250g Silver 500g Gold
  • Flask max. diameter (mm) 90
  • Flask max. height (mm) 120
  • Induction heating power 2.5 kW
  • Vacuum pump  Ext. 4 m3/h
  • Pressure over vacuum 3 bar
  • Max. temperature 1250°C
  • Granulation unit -
  • Main alloys  Gold (Au), Silver (Ag), Copper (Cu), Brass, Bronze, Aluminium (Al) and their alloys,  Magnesium
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 indipendent 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.

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. 
The machine is fully automatic having also a PC based monitoring system for process parameters acquisition and production data management with easy editing of casting programs suitable for many kind of alloy (optional).

This revolutionary machine is the synthesis of the most advanced engineering and years of experience in casting that only TOPCAST will bring in your factory.


 


Gas Wash Procedure

  • Crucible loading operation introduces oxygen

  • The Gas Wash Purge procedure removes the oxygen (1) in a very fast and efficient way and then refills back the chambers with Argon or Helium gas (2)

  • Compared with the traditional crucible protection with flow-meter regulation the consumption of gas is dramatically reduced and the alloys oxidation is minimized

  • Moreover the crucible life is increased: TVC series crucible last up to 250 – 400 casting cycles according to the graphite quality


Melting

  • Advanced Self Tuning thermoregulation (AST™) with exact temperature control of the melted alloys

  • Two Set-Points available: Homogenization and Casting Temperature

  • Medium frequency induction heating stirs the melted alloy and leads to a perfect homogeneity

  • Pulse Stirring Management (PSM™) for an extremely low frequency stirring

  • Highest power density in the market features strongest stirring and low gold losses


 Injection and Compression

  • When the stopper lifts up. it is very important to control the injection rate to avoid turbulences

  • TVC has the unique feature to have the injection rate controllable and programmable (IRC™)

  • The metal enters smoothly inside the mould (4). Then, after filling and during the solidification phase, a strong compression takes place on the tree (5)

  • No turbulences in filling and high compression rate lead to a large reduction of shrinkage porosity phenomena


Tree protection after casting

  • Thanks to the double chamber concept, after the solidification phase, the flask cools down in a protective atmosphere while at the same time you can load your alloy in the melting chamber for the next melting.

  • This operation will allows an overlapping of the casting cycles which will give you the ability to protect longer the tree before removing it without loosing time and productivity

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  • PREMET Technologies FZE
  • JP08/10 Jewellery Park, P.O Box:123869, SAIF ZONE SHARJAH, UAE., SHARJAH, United Arab Emirates