Fixed air knives or a worker with an air gun clear water from seams, tubes and cups after the washer so it does not boil out in the oven. Before the booth, a blow-off removes dust and lint. The air must be filtered and dry, because oil from an unfiltered line causes craters across every part it touches.
Put somebody on blow-off at the washer exit, the channel parts are holding a cup of water each.
Also heard as
- air blow-off
- air knife
Related terms
Dry-off oven
The oven after the washer that drives off rinse water before parts reach the powder booth.
Crater
A round dimple in the cured film where something with low surface tension pushed the melted powder away.
Wash
Line slang for the spray pretreatment washer, or for the pass a part makes through it.
Outgassing
Gas escaping from a porous substrate during cure and blowing pinholes, bubbles or craters through the film.