Until recently virtually all powder application has relied on mixing a large volume of compressed air with powder to “fluidise” it so that it can be moved by a simple venturi pump through a hose to the spray gun.
Now, “dense phase” powder transport, or Prodigy® High Density Low Velocity (HDLV®) delivery offers a new approach that is already having a dramatic effect on powder coating results.
Consider the following impressive list of advantages being seen in the field:
- Consistent powder output over time over a wide range of settings and even with low film thickness powders
- Increased transfer efficiency
- Reduced powder consumption
- Better coverage for difficult to coat parts
- Easier application requiring less operator effort
- Increased production throughput
- Faster colour change – pump provides its own purging
- Reduced maintenance costs
- Powder process control
- Large range of output from the gun by simply turning a knob on the controller, no mechanical adjustments
- Linear powder output: Double the setting, double the output
Conventional powder coating uses low density high velocity principles to convey powder through a larger diameter hose, where as Prodigy® HDLV® technology meters powder to the gun using lss air to propel in only 6mm diameter hose. This increases transfer efficiency as the spray is softer and has better penetration, reducing powder consumption.
A properly designed dense phase system including Prodigy® HDLV® pump, hoses and properly engineered spray gun can provide a wide range of benefits including faster colour change, reduced contamination, better transfer efficiency, improved coverage and faraday cage application. These advantages stemming from the reduced hose sizes, softer powder cloud, and longer electrostatic dwell time, bring with them other commercial benefits such as reduced labor, lower powder consumption, more uniform paint coverage and increased profitability.
Contact Nordson for a demonstration today!