Cure powder coatings with gas-fired infrared burners

There are many methods of curing powder coatings. One method that has been in existence for many years but is today gaining greater acceptance is the use of Infrared heat to cure the powder. Gas Infrared is best suited for curing products with mixed metal thicknesses in shorter time cycles. The additional efficiency of the Infrared radiation within the oven interior shows the glow that the Infrared radiation is emitting to bathe the product with energy.

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news1-2The oven is heated with gas fired “X-TRAD” Radiant Burners as the heat source. The radiant burner provides medium wavelength infrared curing but also curing with convection heat with the help of air circulation. This combination provides excellent paint and powder curing.

This oven provides:

  • High efficiency Radiant Burners, 96% combustion
  • Less cure time (15 minutes typical) – smaller oven
  • Faster curing times on multiple metal thicknesses
  • Burner output variable from 6,000 BTU to 30,000 BTU
  • Product is further cured with the hot convection air
  • Reduced operating cost for electricity and gas

These ovens are in use worldwide. An extremely successful application is that of curing wire mesh. The parts are 12 FT high and can be 30 FT long. The burners are located along the lateral walls of the oven and the heat is distributed throughout the oven interior by the recirculating ductwork above the burners.

Oven Panel Construction (6” thick overall) — ENERGY SAVING FEATURE

The internal oven wall and roof layer is constructed with low thermal conductivity; 4″ insulated interlocking aluminized steel panels. This internal panel system is then covered with 2 additional inches of rigid insulation followed by an exterior corrugated steel panel. This multiple layer design eliminates nearly all through metal.

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The conventional panel design has multiple through-metal layers at every seam, each creating a hot spot the length of the panel and adding heat to the plant and cost to the energy bill. With Amiberica’s layered panel design, exterior wall temperature can be nearly 30 degrees lower compared to the conventional design. That’s 30 degrees less the burner has to provide for the process!

Floor panels are 2″ thick insulated panels and reinforced. The panels are fabricated of 20 gauge aluminized steel sheets on both the inter¬ior and exterior. Within the panels is four-pound density mineral wool, with high temperature binder, as an insulating medium. All structur¬al steel to support the oven is provided.

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The entrance work opening of the cure oven has an exhaust type air seal which will not disturb freshly applied powder. The hood utilizes a 24” diameter tube-axial high temperature construction fan at 2,000 CFM driven by a 2 HP TEFC motor, with V-belt drive and belt guard.

The exit work opening has a vestibule with an air seal which is designed to minimize heat spill from the oven interior. Inside the vestibule a fan draws the hot air which normally would spill out of the hook slot of the work opening, and discharges that hot air vertically downwards towards the floor of the vestibule at a high velocity using special nozzles with adjustable discharge slots. This airflow greatly reduces the amount of hot air escaping the oven. The air seal utilizes 650 degree F. high temperature plug fan delivering 2,750 CFM driven by a 3 HP TEFC motor, with V-belt drive and belt guard.

The oven is complete with gas fired “X-Trad” Radiant Burners as the heat source. The radiant burner provides medium wavelength infrared curing but also curing with convection heat. This combination provides excellent paint and powder curing.

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This oven provides:

  • High efficiency X-Trad Radiant Burners, 96% combustion
  • Burner output variable from 6,000 BTU to 30,000 BTU
  • Faster curing times
  • Smaller oven
  • Reduced operating cost for gas and electricity

The controls for the X-TRAD Burners:

  • Low and high pressure switch interlocks
  • Two (2) Manual shut off cocks
  • One (1) Honeywell Modutrol motor
  • Digital temperature controller
  • Siemens or equal self-regulating gas control valves (Factory Mutual)
  • Honeywell electronic flame monitoring system
  • Combustion blower pressure interlock
  • High limit temperature controller with manual reset

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2018-12-28T07:53:22+00:00
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