What is an electrostatic spray nozzle? Electrostatic discharge is the process of pushing against an electrically charged object (cation) using an electric spray gun. The nozzle itself pushes these droplets along the spray path, just as when you push down on a bag of water by using a normal bag sprayer. While the electrostatic discharge process occurs at a slower rate than the application of a static charge (static shock) directly to the object, it still produces a charge because the charge is existing just underneath the surface tension of the charged droplets. Electrostatic spray nozzles combine both the electrical and physical properties of an electrostatic discharge to provide a non-toxic and versatile technique for handling a wide range of hazardous materials.
The electrostatic spray nozzle was invented by Dr. Reinhold Voll, a specialist in electrostatic discharge mechanisms. His novel electrostatic spray nozzle provides a novel mechanism for electrostatically separating highly fine particles. Voll realized that such separation could be achieved by the introduction of a charge in a fluid stream at extremely high static charges. The introduction of the Voll effect provided a method of electrostatically separating electrically charged liquids or gases from one another by creating a small gap between their boundary areas.
Voll then employed this principle to demonstrate the usefulness of his newly invented nozzle for the purpose of studying the effect of static charge on the flow of a fluid. To demonstrate his achievement, he created a model of the lungs, chest, diaphragm, stomach, and bladder by filling them with water. He then subjected these models to different electrostatic spray nozzle applications, providing a detailed description of the performance of his various fluids.
The two main constituents of electrostatic spray nozzle bodies are the annular electrode and the annular discharge. The annular electrode is shaped like a hollow cylinder and contains metallic pieces and a thin electric conductive liner. On its outside edge, the metallic piece is attached to an insulated metal surface. A thin flexible ribbon or wire leads from the annular electrode to the discharge side of the nozzle body.
The annular electrode is connected to a second electric conductive piece which is placed in the charging chamber. This second piece includes a rechargeable battery and a host of discharge connections that are coupled to the positive and negative contacts inside the charging chamber. The invention provides a means for electrostatic charging of fluids by means of the electrostatic spray nozzle. The electrostatic charging of the stream produced by the invention is initiated by the application of a varying charge to the stream.
The method of electrostatic spraying involves the induction charging of a fluid against a surface to be charged, usually a thin film. The electrostatic spray nozzle includes a movable body, typically made of plastic, metal or even plastic composites. At the other end of the nozzle, an air gap is present. The air gap allows the fluid to be charged by the charging agent which is then drawn into the body of the nozzle by the air pressure present in the chamber. The charged fluid forms a cloud or droplet at the ends of the nozzle and the induction charging produces an electric field that is charged, which induces an electric current within the droplet cloud.
A third party skilled in the art of forming metals may assist in the practice of electrostatic spraying, if desired. A fourth person may also be skilled in the art of forming metals using the invention. Such persons are called electrostatic charge experts and are commonly employed by injection molding equipment manufacturers. The electric charges formed by the electrostatic spraying nozzle are induced by the charge of the charged particles that form part of the formation process. This charge can be produced at any temperature under appropriate operating conditions by the proper application of appropriate electrical charge.
All of the above embodiment descriptions are merely exemplary and the scope of the invention is not limited to the precise forms disclosed. Necessarily so, since the application of the electrostatic spray nozzle comprises a number of complex operations performed in combination with one another. Each of these operations is intended to achieve some result which are intended to contribute to the attainment of the overall objectives of the invention. It is however considered that all of the operations combined will have an effect on the final output of the invention.