Continuous dryer for drying adhesives on clutch discs
We supplied several continuous dryers for the drying process of adhesion layers and adhesives on clutch discs to a major manufacturer of clutch parts.
One of these dryers is the continuous dryer SP 4500/15. The dryer is divided into a drying and cooling section. The parts are dried with hot circulating air and a heating unit with a fan is located on the ceiling of the dryer. The parts pass through the dryer on a continuous wire conveyor belt equipped with sufficiently large wire meshes, which allow free circulation of air from all sides of the processed part. After passing through the drying zone, the parts are cooled in the connected cooling tunnel also equipped with a belt conveyor. The parts must be cooled to a maximum of 30°C at the exit from the tunnel, which is why the cooling zone is equipped with an air conditioning unit.
The dryer allows drying of two types of adhesives, water-based adhesives and solvent-based adhesives. The dryer is therefore protected against the accumulation of flammable gases by means of permanent ventilation (exhaust) and the maximum amount of solvent in the coating is defined. Furthermore, sensors are placed on the dryer to measure the solvent content in the surrounding atmosphere. In case of any danger of concentration of released solvents, the dryer stops. The design of the dryers thus meets the requirements for thermal processing of batches releasing flammable substances.