ASB-xxx Spraybells

1. Introduction to top

APSON spray bells are high-speed rotators for yielding and fine dissipation of liquid media. Typical media are normal lacquers, metalic lacquers or other aggressive liquids, e.g. solvents.
APSON ASB-xxx Spraybells

2. Structure to top

APSON spray bells are rotationally symmetrically developed. They usually consist of at least two parts - the front part and the coat.
The front part usually consists of polished inoxidable steel, aluminum, titanium or plastic. It has also the task to connect the spray bell anti-swiveling with the shaft as well as to lead the medium in a thin layer to the edge of the spraying bell during the application. The edge of the spraying bell can be executed knurled or smoothly. There are spraying bells for turbines with hollow or full waves.
The coat consists usually of lighter material, e.g. aluminum or plastic. It has the task to determine the flow conditions of air in direct proximity of the spraying bell.

3. Function to top

During the application at the spray bell a high electrical DC voltage from -40 to -80 kilovolts is applied. The objects which are to be sprayed are on earth potential (0 V).
At rated speed from 40000 to 60000 revolutions per minute the electrically charged medium yields through the center of the front surface.
Because of strong centrifugal forces the medium flows over the edge of the front surface into the strongly whirling ambient air. Due to the detachment of the edge of bell a fine fog from negatively charged spraying medium forms.
If the medium was sufficient strongly loaded, the droplets shatter in the air into still smaller droplets. These are attracted by the object to be sprayed due to the dominant electrical field. In this way the fine spray deposits even on those object surfaces that are turned away from the bell.

4. Ordering to top

APSON has experience of many years in the production and repair from spray bells for electrostatic painting.
New spray bells can be manufactured also according to specification of the customer. Condition is a Written Explanation of the customer that he has copyrights or manufacturing rights of the respective spray bell or bell type.
Alternatively APSON develops and produces inexpensive and high-quality spare bells for already existing Plants. These obtain the same painting quality as the original bells. From arguments of rights they must have however different geometrical dimensions than the originally employed bells.