Twin Srews and Barrels

EJK delivers twin screws and barrels compatible to every counter rotating twin screw extruder available in the market. We are able to increase the output, life-time and product quality and to increase your satisfaction and profit.

EJK delivers its own technology – improvements compared to the original OEM parts with world wide acceptance.

EJK has the scientific and mathematical base for the design of screws for all types of PVC-formulations. Our design is based on the special properties of the product PVC. The S-PVC cannot melt without shearing at high temperature and cannot gell if it is not 100% compounded before. 100% compounded means it is 100% gellable. The model of PVC-processing is fixed in the EJK-Model. Based on this model EJK is designing a wide range counter rotating twin screws.Every screw has a feeding zone from which the material is volumetric dosed into the extrusion process. The next zone is the preheating zone in which the material has to be heated up to approx. 150 degrees Celsius. This preheating zone is devided in sub-zones, each with a special function for heating up, mixing and homogenising.

The next zone is the compression zone which shear the PVC powder-particles to a condition what we call 100% compounded.The following vent-zone has the only function to get off all gasaple elements, it has not the function to heat or gellThe metering zone has to build up pressure which creates additional temperature. This temperature is the reason for the gelation of the PVC. In accordance to the temperature you will get high or low gelation-levels with the resulting properties of the PVC-product.The final zone at the screw tip is the equalising zone. Equalising means equalising of pressure (pumping of counter rotating twin screw) and not equalising of temperature.Our screws and barrels are manufactured with high alloy and high forged special German steel.

We manufacture the counter rotating twin screws and barrels on most modern numeric controlled machinery. Our staff has long term experience in the field of manufacturing counter rotating twin screws and barrels.

The standard wear protection is a special gas-nitration process. For application of high percentage of filler we offer MOX coating in combination with a special surface protection.

The standard wear protection is a special gas-nitration process. For application of high percentage of filler we offer MOX coating in combination with a special surface protection.

One of our highlights is the EJK MOX coating. The coating is placed on the running surface of the screws to increase the life-time. On the one hand MOX is hard and unsusceptible against mechanical damages and on the other side it reduces the wear of the screw and barrel.

Wear protection is done by hard and tribological balanced steel combination – but the best wear protection you will get out of a well balanced screw design!

 

Contact

EJKrueger GmbH
Wiesener Weg 28
D-26632 – Ihlow
Germany

tel: +49 4943 200 842
fax: +49 4943 200 836
7/24 +49 171 999 77 77
info@ejkrueger.de