Applying powder is fairly easy and, supplying you can get the next equipment, is one thing that many practical people can learn. You’ll need: a powder gun, a way to obtain clean dry compressed air, an electric supply and also the powder for spraying.
Powder is drawn in the container, which may be the manufacture’s box or perhaps a hopper, with respect to the kind of equipment, using a effective pump. To get a continuing smooth flow two methods are utilized: vibration and fluidisation. Vibration keeps the powder level for the suction tube fluidisation enables the powder to circulate with the pump easily.
The powder is drawn vertically in the container towards the pump where it’s passed across the powder tube this could vary long but is generally three meters. The powder will go into the gun body. The manual gun is formed for easy handling and luxury and can usually permit the powder to go in at the end from the handle. On automatic equipment the powder will often enter in the rear because the gun body is going to be straight.
There are lots of types and variations of application equipment to suite specialised ways of application however the primary two primary kinds of gun in keeping use are Tribo charge and Corona charge. Both depend around the powder through an electrical charge that consequently enables the materiel to draw in to the top of resist be coated.
Tribo charge depends on the powder passing across the pipe and thru specialised plastics within the gun body to create friction. The surfaces from the powder attract opposite polarity charges that consequently attract one another, despite separation. This process is, however, restricted to certain kinds of powders.
Corona charge depends on an electric charge at high current (as much as 100kv) to be sold in to the powder cloud in the point it’s released in the gun. The charge is relayed towards the gun using a low current (10-12v) cable and so the current is multiplied within the gun handle towards the high current needed. Your particulars are often discharged in to the powder cloud at the purpose of exit. The powder on this kind of equipment may also get some tribo charge along its route, same goes with enable this kind of equipment is the preferred option for most coaters.
The fully billed powder will exit the gun inside a fine dust cloud and will also be drawn to something that has the capacity to pay a charge from the distance close to 100 – 300 mm this then continues to be a powder on the top of component until cured. The curing process is going to be discussed in further articles.