For mixing of plastic products like HPDE (high-density-polyethylene) and PP (polypylene) rep. olelefins in general.
In most applications the mixer is located upstream to the extruder which takes the mixture of the raw-product and several additives and produces pellets for use for the end-customer. We produce our Mixers with oversized inner surfaces and sophisticated engineerd mixing-tool-geometries to ensure a high and reliable, process-safe mixing-quality. Unwanted heating-up of the product is avoided and and gentle handling of the bulk-solid achieved.

To ensure protection against explosions – even in our standard version –  it is possible to use nitrogen purging to safeguard the product chamber and the shaft passages against the ingression of oxygen and to generate an inert atmosphere.  Nitrogen flowmeters with HART signal output, electronic pressure measurement in the product-room as well as rotation control by means of a pulsed signal meet the growing demands in terms of monitoring and control.

In the area of the material outlet, we offer an additional bag filter with automatic, differential-pressure-controlled cleaning in order to avoid any overpressure in the product space due to upstream or downstream components as well as nitrogen loading. All necessary instruments are housed in  a user-friendly, protected and visually appealing stainless-steel control cabinet.

Mixing length up to 14.500 mm (distance inlet – outlet)

No intermediate bearing

Practically maintenance-free

Throughput >200 m3/h

Minimal nitrogen consumption

According to the hollow-flight principle, screw flights are hollow, so that they provide a path for a cooling or heating medium to flow through. This means that bulk materials that have to be thermally processed, can be cooled, heated or kept at a constant temperature. Screw conveyors with conventional design only allow the heating or cooling medium to flow through the housing and optionally the worm shaft, where as the hollow screw flights of our KÖLLEMANN screw-heat-exhanger are used for heat or cooling transfer by means of a thermal medium along the entire length of the screw. With the active use of the screw flight as heat exchange surface, the efficiency of the thermal heat transfer of a screw heat exchanger increases disproportionately. The hot or cold surfaces of the screw flights are in constant contact with the bulk product and allow an optimum heat exchange .

The screw flight surface makes up more than two-thirds of the entire product-contacting surface of a screw heat exchanger. Thus, compared to conventional products, the Köllemann screw-heat- exchanger has considerably more area per meter of conveying path and thus a considerably higher efficiency.

The supplied heat is utilized to the maximum by minimizing radiation losses. This results in a multiple of the transfer capacity and is the only reason why applications in higher performance ranges can be realised at all. This process  offers great advantages in terms of maintenance, service life, efficiency and space requirements of the machine. This design allows maximum performance in the smallest space.

Your contact partner

Matthias Ginster
Head of Sales