ARC SPRAY GUN

ARC SPRAY GUN

The simplicity of this thermal spray process, usually packaged as a complete spray unit, makes electric arc wire spray an excellent choice for in-shop or on-site work. Among the first of the thermal spray processes to be invented, electric arc wire spray holds its own as the favored process for many coating applications. Using only the power of electricity, electric arc wire spray requires no process gases other than atomizing air. As a result, coatings are characteristically clean and often more machinable than those produced using other thermal spray processes. With the lowest number of input parameters of any thermal spray process, electric arc wire systems are simple to operate and maintain, yet produce very reliable and robust coating results. An arc spray gun is another form of the arc which adhere coating on the inside and outside surface of a part. It is mostly used for coating on the cylinder bores of an engine. It enables the use of an aluminum engine block without having heavy cast iron sleeves. An arc is used to melts the wire that is a supersonic plasma jet. This plasma jet formed by transferred an arc between a non-consumable cathode and wire which is used for coating.

Compressed air transports the molten droplets stream on the components after atomization. Due to the high kinetic energy the molten droplets impinge on the surface of the substrate and flatten. When molten droplets come in contact then they rapidly solidify. The stacked bits creates a high wear-resistant coating on the work material. The thermal spray process utilizes a single wire as the feedstock material.

In the Arc Spray process, the metallic wires are melted with the help of an electric arc. The molten material is atomized by compressed air and propelled towards the workpiece.

Working Principle:-

Like all thermal spray processes, the electric arc wire process requires a heat source to melt the coating feedstock, however, it is unique in that it does not employ process gases to generate the heat source. The arc wire spray process uses two metallic wires, generally of the same composition, as the coating feedstock. The wires are electrically charged with opposing polarity and are fed into the gun at matched, controlled speeds. When the wires are brought together at the contact point, the opposing charges on the wires create an arc that continuously melts the tips of the wires. Compressed air is used to atomize the now molten material and accelerate it onto a properly prepared workpiece surface to form the coating. In electric arc wire spray, the weight of coating that can be deposited per unit of time is directly related to the output amperage of the system and the density and melting point of the wire. Depending on the columnar strength of the wire, ‘push’, ‘pull’ or ‘push/pull’ mechanisms can be used to feed the wire at a constant rate.

Applications:-

Rough or smooth…thin or thick…on large structures or small components, electric arc wire spray delivers outstanding coatings. Manufacture components that exhibit specific surface characteristics. Expensive substrate materials for components, yet maintain high-performance surface properties. Improve component service life. Repair existing components to like-new or better than new condition. Salvage is a machined component. gives a good performance bond coat in a coating system.

Types of Arc spray gun

·       Arc Spray (Air Driven)

·       Arc Spray (Electrical Driven)

Arc Spray (Air-driven):-

Arc spray is a high-performance wire arc spraying process, the coating material should be electrically conductive. two wires are fed through air motor. coatings is generally denser and stronger than their equivalent combustion spray coatings.

Air-driven comes in three Models

·       AWC-200

·       AWC-400

·       AWC-600

Specification:-

 ArcSpray (Electrical Driven):-

Arc spray is a high-performance wire arc spraying process, the coating material should be electrically conductive. two wires are fed through the electrical motor. coatings is generally denser and stronger than their equivalent combustion spray coatings.

Electrical Driven comes in two model

·    ARC Spray Gun(AIRO 101 DC)

·    ARC Spray Gun(AIRO 101 AC)

ARC Spray Gun (AIRO 101 DC):-

Arc DC Spray Gun  Comes in Three Variants

·       AWC-200

·       AWC-400

·       AWC-600

Specification:-

ARC Spray Gun(AIRO 101 AC):-

Wire arc spray uses two consumable wire of metal to fed inside the gun independently. These wires are charged and then an arc is generated between them. The heat from this arc melts the incoming wires of metal. After that this molten metal entrained in an air jet from the gun. This entrained molten metal deposited onto the workpiece with the help of the AC motor. This process mostly used for heavy coating of metallic on a workpiece.

AC arc spray gun comes in three variants

·       AWC-200

·       AWC-400

·       AWC-600

Specification:-