Painting Inside Tubes Again

Question:

In an answer to a question in a previous issue of Products Finishing, you mention painting tubes with a 360-degree nozzle. Where did you find the nozzle? K. C.

Answer:

Not again! Some of these subjects have a life of their own. K. C. is referring to past Coating Clinic and Painting Clinic Q&As involving painting inside tubes using a 360-degree spray nozzle, the last of which appeared in the July Issue. I want to thank him for archiving Products Finishing magazines and putting them to better use than the fate that befell old mail order catalogs.

My first project with these 360-degree spray nozzles, in 1960, involved applying a liquid coating to the inside of rotor and stator coil winding slots, in fractional horsepower electric motors, to replace slot liners (impregnated paper used as electrical insulation). Today, these parts are powder coated. We bought them from a spray pretreatment equipment supplier. Suppliers of this equipment are listed under Nozzles, liquid spray, on page 344 of the 2004 Products Finishing Directory & Technology Guide (www.pfonline.com/suppliers.html).

In another project, we were applying a liquid coating inside conduit tubes using 360-degree spray nozzles. We bought them, their lances and spray guns from a painting equipment supplier. Suppliers of this equipment are listed under Nozzles, spray painting on the same page of the Directory.

In a third project, we were applying phosphors to the inside of fluorescent tubes using a powder spray gun, lance and nozzle. We bought them from a powder spray equipment supplier. Suppliers of this equipment are listed under Powder Coating Equip-ment, electrostatic spray on page 395 of the Directory.