Electrostatic rotary atomizing spray device with improved atomizer cup

摘要

An electrostatic, liquid spray, rotary atomizer has an atomizer housing, a power supply within the housing and an atomizer cup at a front end of the housing. The atomizer cup, which is formed of a non-conductive material, has several elongate conductive pathways embedded in the body of the cup. Each conductive pathway has one end exiting an outer surface at a rear end of the cup for receiving the charge from the power supply and another end exiting an inner surface at a front end of the cup for conveying an electrical charge from the power supply to the liquid (paint) particles passing through the atomizer cup. An electrode is provided for maintaining a small voltage at the access hole. The rotary atomizer with the improved charge ring and rotary cup can be mounted to a robot and connected to the liquid supply by an elongated spiral passageway to increase the electrical resistance between the atomizer and the liquid supply so that a very small electrical charge, if any, will be present in the passageway carrying paint to the rotary cup.