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Plasma

AT 1200

AT-3000 Plasma System

Plasma Process

In the plasma spraying process, the material to be deposited ,typically as a powder, is introduced into a plasma jet stream. This plasma stream is created by disassociating gas molecules combinations of hydrogen, argon, helium, and nitrogen in an electric arc. The energy from this reaction generates a gas stream that is at a temperature that exceeds 20,000^°F which is capable of melting all materials that can be made into a powder. After the material is melted in the plasma gas stream, it is atomized ans propelled towards the surface being coated. There, the molten droplets flatten, rapidly solidify and form a deposit. There are a large number of technological parameters that influence the interaction of the particles with the plasma jet and the substrate and therefore the deposit properties. These parameters include feedstock type, plasma gas composition and flow rate, energy input, torch offset distance, substrate cooling, etc.

The former Miller Thermal group is still in Appleton WI and they are known as Thermach. They continue to build and improve on one of the cornerstones of Thermal Spray Equipment.

The AT-3000 has the following features:

Standard features include:

Wall mounted console
Built-in user-operated Safety Purge System
(Class 1 Division 2 Type Z Purging, per NFPA 496)
Booth and Emergency Stop Interconnections
Critical Orifice Gas Flow Control
- Argon/Nitrogen Primary Gas Control
- Helium/Hydrogen Secondary Gas Control
- Two Argon/Nitrogen Carrier Gas Controls
Touchscreen/PLC Control of System Functions
- Automatic Process Start and Stop
- Alarms and Warnings
  with Automatic Safety Shutdown Sequences
- Closed Loop Amperage Control
- Dual Powder Feeder Control
  Controls two Powder Feeders separately or simultaneously
  
  Closed Loop RPM Control
  (when using 0-15 RPM AT-1200 Powder Feeders)
Process hour meter
with settable maintenance alarm
60KW Power Supply (1000 Amps at 60 Volts, 100% duty cycle)
10 Ton Heat Exchanger with alarm feedback to console
Solid State High Frequency Arc Starter
Built-In Gun Voltage Sensing