The work pieces are gently tumbling over each other in the rotating drum. The resulting intensive mixing effect evenly exposes the work pieces to the spay pattern of the spray gun at different angles – a pre-condition for an even coating thickness.
The special drum shape and the adjustable rotary speed ensure an optimum tumbling and mixing of the work pieces. The drum inclination is infinitely adjustable within a certain angle and can, thus, be precisely adjusted to different work piece shapes. The ideal angle of inclination for the various coating processes is determined by processing trials for your individual application.
Different drum sizes for different part volumes are available. Exchanging one drum with another is easy and requires very little time. This allows adapting the Rotamat quickly to different batch sizes or coating processes. If required, the inside of the drums can be lined with a 3S-coating. In addition, the inside of the cover and the drum housing can be coated with an anti-adhesion material.
Once the coating process is completed, the drum is mechanically tilted downward for gently discharging the finished work pieces, which are now ready for the next production step.
HOMOGENEOUS APPLICATION OF THE COATING MATERIAL
An automatic spraying systems evenly applies the coating material onto the work pieces gently tumbling in the rotating drum. If requested, the machines can be equipped with two spraying systems. This is advised, if work pieces must be coated sequentially with two different materials like base and topcoat or primer and cover).