Products

Feeding Systems

Precise feeding devices

Extruder feeding systems enable precise and controlled material feeding into the extruder, in particular by evenly feeding of light and poorly flowing materials such as regrind, powder or pellets, to ensure efficient and high-quality processing.  

KREYENBORG offers the following extruder feeding systems:

Densifier

The Densifier (type KWS) is used to feed extruders with products that do not flow optimally, such as regrind, punching grids, powder, agglomerate, film flakes and fibers.  

Stopfwerk
Feeding the material to be processed is transported into the receiving hopper of the Densifier
Filling level monitored with a level-indicator
Loosening if necessary, the material is loosened up in the bin by means of special agitators and scrapers
Pre-compaction the material is pre-compacted via the densifying screw
Extruder feeder by pre-compacting the material and feeding it into the extruder at a constant pressure, the extruder is fed with the largest possible amount of material
Throughput 100 – 4,000 kg/h (film flakes)
200 – 9,000 kg/h (powder)

Options

Lifting system The densifiers may be equipped with a hydraulically-operated lifting system with manually operated pump. This device ensures the quick and easy lifting and swinging away of the aggregates from the extruder for easier cleaning and maintenance.
Coating special coatings of the bin and of the densifying screw for products that tend to stick

Special Feed Hopper

A Special Feed Hopper is used for the direct refeeding of edge-trims or production waste into the production extruder. Free-flowing granulate (virgin material) can be added to the recycled material (film flakes, regrind).

Spezial_Zufuehrtrichter
Direct refeeding no additional thermal stress of the material is caused, absent intermediate granulation, by direct refeeding
Feeding At the end of the film line, the edge trims are ground and fed into the special feed hopper. Simultaneously, granulate can be conveyed into the same hopper over a second inlet pipe.
Mixing regrinds of edge trims/production waste and granules can be mixed by means of a screw
Extruder feeder an adjustable feeding screw ensures constant feeding of the extruder
Throughput 100 – 1,000 kg/h