Blow-off device

A cleaning device for abrasive belt, workpiece and feeding belt working with compressed air.

It can be supplied with air from a compressed air system or from it's own air fan. The reduction of air consumption is possible e.g. by jump-in control. So the nozzles only work as long as the workpiece is being processed by the corresponding aggregate.

Sanding belt cleaning

The belt cleaning in wide belt sanders is done with compressed air from oscillating nozzles. Particularly effective are nozzles directly at the deflection roller in a suction tube. Due to the tension of the sanding belt at the pulley the spaces between the abrasive grains are enlarged, so the dust which is stuck between can be blown out.

The sanding belt cleaning ensures a uniform 'fine' surface image and increases the life of the sanding belt.

Alternative names from some manufacturers:

Workpiece cleaning

The need for mechanical workpiece cleaning exists above all with wide belt sanders in paint lines. The workpieces must be absolutely dust-free before the lacquer is applied, but are not picked up again by personnel after sanding. If cleaning is not carried out by special brushing machines, the wide belt sander must be equipped with appropriate workpiece cleaning devices. The blow-off device here usually consists of rotating nozzles. In addition, cleaning brushes (brushing unit) and ionising devices are used. Some machine manufacturers also integrate WANDRES cleaning units into their machines.

Alternative terms of some manufacturers:

Images and Videos

Oscillating nozzles of a SANDYA 600
SCM, 2016
Video
Abstract system schematic
HEESEMANN, 2010
Cleaning brush
DMC
Blow-off nozzles with ionising device
HEESEMANN
Ionising bar in front of rotary blower
DMC
ES - dust extraction
WEBER
Rotating blow-out nozzles
KÜNDIG