SPIKER
Elite Member
done a LOT of power coating and built industrial ovens and washer systems for the process. here http://www.haynncorp.com/
pre-heat HEAVY items in an oven first then coat and bring back to temp for most parts works well.
the base metal needs to hit the cure temp to get proper adhesion and proper cure is usually 15~20 minutes at the cure temp, little over temp little less time is ok for some colors but more often than not under temp slightly longer is better. the powder can burn if temp is too high and yellows, reds and bright or translucent colors are worse than darker colors in this aspect.
powder coating is not a magic cure all either. still need to have the base metal in good shape not some rusty greasy mess is not going to look like brand new when coated. prep by sandblasting & treating with a phosphoric per-treatment is recommended. sandblasting alone is good but can leave greases on the parts so still need to De-grease afterward.
the off gassing chemicals are treated like Xylene so yes flammable and not good in a food oven. you can take a couple of the oven heating elements and build an insulated metal box for an oven but you still need to have a exhaust to draw out the Xylene gasses or else a explosion can happen when the oven gets filled w gas and the door opened. the powder also can ignite w sparks real easy static electricity can cause this and Ive seen 2 flash overs in spray booths when people neglected to hook up ground cables...
EDIT IN: I forgot to mention when you bump a part after hanging it and moving it into the oven, dont pick up the gun and part and spray it while hanging onto the metal hook
dont ask how I know this is a REAL bad idea but I'm sure many will do it just to see why they shouldnt do it.
mark
pre-heat HEAVY items in an oven first then coat and bring back to temp for most parts works well.
the base metal needs to hit the cure temp to get proper adhesion and proper cure is usually 15~20 minutes at the cure temp, little over temp little less time is ok for some colors but more often than not under temp slightly longer is better. the powder can burn if temp is too high and yellows, reds and bright or translucent colors are worse than darker colors in this aspect.
powder coating is not a magic cure all either. still need to have the base metal in good shape not some rusty greasy mess is not going to look like brand new when coated. prep by sandblasting & treating with a phosphoric per-treatment is recommended. sandblasting alone is good but can leave greases on the parts so still need to De-grease afterward.
the off gassing chemicals are treated like Xylene so yes flammable and not good in a food oven. you can take a couple of the oven heating elements and build an insulated metal box for an oven but you still need to have a exhaust to draw out the Xylene gasses or else a explosion can happen when the oven gets filled w gas and the door opened. the powder also can ignite w sparks real easy static electricity can cause this and Ive seen 2 flash overs in spray booths when people neglected to hook up ground cables...
EDIT IN: I forgot to mention when you bump a part after hanging it and moving it into the oven, dont pick up the gun and part and spray it while hanging onto the metal hook
dont ask how I know this is a REAL bad idea but I'm sure many will do it just to see why they shouldnt do it. mark
