Tag: TRIBO AND CORONA CHARGING METHODS
Corona and tribo charging technology
Understanding the differences between corona and tribo charging, assists in deciding which technology is best for an application. Each type of charging has typically been used for specific industries. Tribo charging has typically been used in industries which require epoxy powder or products that have intricate shapes. Insulating products such as electrical equipment that only require protective coating are prime users of tribo charging guns. This protective coating is generally;epoxy due to its tough finish. Also, industries such as wireRead More …
How It Works-Tribo Charging Method
The charging of the powder particles in a tribo gun is achieved by the friction of two dissimilar materials coming in contact with one another. (See diagram #2.) In the case of most tribo guns,electrons are stripped from the powder particles as they make contact with the gun wall or tube which is typically made of teflon. This results in the particle giving up electrons which leaves it with a net positive charge. The positively charged powder particle is transportedRead More …
Corona Charging Method-How It Works
In corona charging, a high voltage potential is developed at an electrode located in or near the powder stream. With most corona guns this occurs as the powder exits the gun. (See diagram #l.) An ion field is generated between the electrode and the grounded product. Powder particles passing through this field are bombarded with ions, become charged, and are attracted to the grounded product. The charged powder particles accumulate on the grounded product and are electrostatically retained long enoughRead More …
New technologies for corona and tribo gun
Equipment manufacturers have tried many different guns and nozzles to optimize the coating process over the years. However, most new technologies are developed to meet the needs of specific market requirements. A corona gun technology that has been used in different forms is the grounding ring or sleeve. This grounding ring is usually located either inside or outside the gun at some distance from the electrode and opposite the product being coated. It can be located on the gun itselfRead More …
Differences Between Tribo and Corona
When evaluating the two type guns for a specific application, there are some fundamental items to take into consideration. The differences between tribo and corona guns are outlined in this Manner. Faradav Cage Effect: Probably the most common reason to consider tribo guns for an application is the ability of the tribo gun to coat products with a high degree of Faraday cage effect areas.(See diagram #4.) Examples of these areas are corners of boxes, fins of radiators, and supportRead More …
Difference of Corona Charging and Tribo Charging
Critical Variables Corona Tribo Faraday Cage More difficult to coat recesses Easier to apply to recesses Back Ionization Easier to coat thinner films Easier to produce thicker films Products configuration Not good for complex shapes Very good for complex shapes Production requirements Wide range of line speeds Good for lower line speeds Powder Chemistry Less dependent on chemistry More dependent on chemistry