TMA-G is a family of gas atomizers designed to produce metal powders of rounded and regular shape, to be used in many industrial, chemical, electronics and rapid prototyping application (additive manufacturing) as SLM (Selective Laser Melting) and EBM (Electron Beam Melting).
The atomizer is based on an induction furnace, working in a closed chamber under protective atmosphere, where the molten metal is poured and hit by a jet of high pressure inert gas, producing fine and deoxidized powders.
Induction heating ensures a very good homogenization of the melt thanks to the action of magnetic stirring during the molten phase.
The die unit is equipped with an extra induction generator, which allows to restart the cycle in case of cycle interruption.
Following the steps of melting and homogenization, the metal is poured vertically through an injection system positioned on the lower base of the crucible (nozzle).
The type of nozzle used in TMA-G is the so-called close-coupled nozzle.
Multiple streams of high pressure inert gas are aimed and focused on the metal beam in order to ensure a fast alloy solidification in the form of fine powder.
The real-time process variables such as temperature, gas pressure, induction power, oxygen ppm content in the chamber and many others, are displayed in both numerical and graphical format on a monitoring system for an intuitive understanding of the working cycle.
The system can be operated manually or in fully automatic mode, thanks to the programmability of the entire set of the process parameters via a user-friendly touch-screen interface.
The monitoring system can be easily connected via Ethernet to the factory network.
Technology & Features
Metals and Field of Application
- Atomized Metals: Cu, Al, Zn, Sn, Au, Ag and their alloys like Bronze and Brass.
- Field of Applications: industrial, chemical, electronics and rapid prototyping applications (additive manufacturing) as SLM (Selective Laser Melting) and EBM (Electron Beam Melting)
- Advanced Self Tuning thermoregulation (AST™) with exact temperature control of the melted alloys
- S-type thermocouple positioned inside the stopper
- 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
- Second generator for indipendent heating of the die
- Close-Coupled Nozzle
- Pressure / Flow regulation of the inert gases
- The atomizer can work with Argon, Nitrogen or Helium
- Automatic self-test of vacuum sealings, o-rings, seals and filters
- Factory Network Connection: RS232, Ethernet
- Troubleshooting: Connecting to an on-line via modem
- Oxygen Analyzer: Measurement of oxygen present in the melting chamber
- Lid Locking System: Lock chamber (temperature-dependent
|Crucible working capacity||up to 7,5 kg Bronze
9 kg Silver
17 kg Gold
up to 40 kg Bronze
50 kg Silver
13 kg Aluminium
|Atomizing gas||nitrogen, argon, helium|
|Crucible volume||up to 1500 cc||up to 7000 cc|
|Induction power||20 kW||40 kW|
|Recovering system||cyclone, bag filter|
|Granulometry||according to customer spec|
|Max. temperature||1600 °C||1600 °C|
|Process time||30 minutes||50 minutes|
|Autotest with data report|
|Monitoring system for data acquisition|
|Vacuum leakage detector|
|Main alloys||Gold (Au), Silver (Ag), Copper (Cu), Brass, Bronze, Aluminium (Al) and their alloys|