Posted by Rootsy on June 01, 2009 at 09:39:56 from (24.247.111.162):
In Reply to: Powder coat painting posted by Dave H (MI) on June 01, 2009 at 09:06:43:
I do some powdercoating... it isn't painting... what you have is finely particulated plastic... the consistancy of talc more or less... load it into a "gun", connect ground to the part to be coated and the control box creates a large potential difference that charges the powder... The powder then eletrostatically clings to the part as the gun meters it out (forced out by compressed air).. just wand it over and the dust cloud adheres to the part.. more or less... If you mess up just smack the part, all the powder falls off.. or you can blow it off with the air gun and start over.
DO NOT use the house oven as the curing process off gasses and can smell something terrible.. don't want to melt and cure in any oven you use for food prep due to those chemicals. I have an old oven in the shop... most non ceramic based powders require right around 400 F to cure.. anywhere from 15 minutes to an hour... after melting and flow out... Once it is cured I just shut the oven off and crack open the door and let it cool... Or let it cool a bit and slide it out as I set it all on oven racks.. and move the part and rack somewhere to cool out of the way.
Good luck... If you want a 'decent" intro package look at caswell plating and their stuff...
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