Powder coating: way to add more positive charge?

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SUMMARY

This discussion focuses on enhancing the positive charge in powder coating applications, particularly using inexpensive guns like those from Harbor Freight. The part to be coated is negatively charged due to grounding, while the powder is positively charged by the gun. A suggestion is made to install a more powerful cascade in the gun's barrel to achieve higher voltages, potentially up to 140kV. Additionally, the discussion references the importance of using thermoset plastic powder and the appropriate baking temperatures for effective coating.

PREREQUISITES
  • Understanding of powder coating principles
  • Familiarity with electrostatic charging in coating processes
  • Knowledge of thermoset plastics and their baking requirements
  • Experience with powder coating guns, specifically models from Harbor Freight
NEXT STEPS
  • Research how to install a high-voltage cascade in powder coating guns
  • Explore thermoset plastic powder options and their specific baking temperatures
  • Investigate the electrical properties of powder coating and static charge enhancement techniques
  • Read reviews and comparisons of different powder coating guns available in 2022
USEFUL FOR

This discussion is beneficial for DIY enthusiasts, hobbyists in home powder coating, and individuals looking to optimize their powder coating processes with cost-effective solutions.

stryped
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TL;DR
Powder coating
I am thinking of powder coating at home. I know the part to be coated is negatively charged because it is grounded. I assume the powder is positively charged by the gun. I wonder if there is a way to add more positive charge cheaply to an inexpensive gun like the one at harbor freight? I think this is one of the drawbacks of a cheaper made gun. Could some sort of static charge be added?
 
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I use to work in a powder coat factory, spray on powder is thermoset plastic. Hot oven melts plastic to clean metal parts. You can order powder any bake temperature you like. I think the lowest bake temperature is about 350°f. We used 540°f power. Metal parts are electrically charged + & - to make powder attracted to parts. Call PPG they sell powder, they will mail you 1 lb free samples. House is none conductive how will you make powder stick and how will you bake your house in an oven? Heat gun will take years.
 
Last edited:
stryped said:
TL;DR Summary: Powder coating

I am thinking of powder coating at home. I know the part to be coated is negatively charged because it is grounded. I assume the powder is positively charged by the gun. I wonder if there is a way to add more positive charge cheaply to an inexpensive gun like the one at harbor freight? I think this is one of the drawbacks of a cheaper made gun. Could some sort of static charge be added?
The cascade is located in the barrel of the pistol. That will determine the voltage you get out. Simply install a more powerful one, up to 140kV.
 

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