In process engineering with planetary roller extruders, not only tempering and speed but also the type and design of exchangeable mechanical components of the process section have a serious influence on the behaviour of the extrusion mass. The number, length and type of the used planetary spindles as well as the existing of dam rings between the cylinder modules and their inner diameter influence the melting and mixing behaviour of the mass as well as the dwell time and the friction.
Of course, the physical properties of the raw material to be extruded, such as density, humidity, melting point, viscosity and temperature, as well as the degree of filling of the corresponding roller cylinder module, also play a decisive role in the extrusion process.
In order to generate a stable extrusion process with consistently high product quality, a number of factors and influencing variables must be taken into account. If only one of the factors is changed, the extrusion result always changes too. Even the modification of small details, such as e.g. the inner diameter of an intermediate stop ring, the mixing ratio or the temperature of raw materials, can be decisive for success or failure, especially for complex processes.
Process technology information for the processing of bitumen masses:
For the compounding of bitumen masses, the raw bitumen mass should be fed to the planetary roller extruder in liquid form via an injection ring between the feed cylinder and the first roller cylinder module. In order to prevent the melted bitumen mass inside the processing section from running back against the extrusion direction and to ensure good discharge, the processing section of the extruder must have an inclination in extrusion direction.
For technical questions, please contact our service department or you are welcome to use the following contact form.
L-WE 30 - a new extruder generation for the laboratory scale
The modular extruder system of ENTEX has been complemented with the Pharma Laboratory Extruder of size 30. This means that the advantages of the planetary roller extruder - absolute temperature control and suitable mixing of active substances, low-shear thin-layer rolling-out, large surface exchange - can now also be applied in material-critical areas. With this, ENTEX allows now to process also material quantities of several hundred grams per hour.
Did you know that we have registered a new property right?
The ENTEX system is enriched by a further element – ERMO (degassing reaction module) is a world innovation that further enhances the efficiency and versatility of the ENTEX planetary roller extruder.
This latest addition to the modular system of ENTEX offers a significantly increased process chamber volume in comparison to the conventional cylinder assembly of the respective series.
It has been developed specifically for degassing applications. Here, free large-scale process surfaces and generously dimensioned flow cross-sections are decisive. ERMO maximizes these aspects without significantly changing the size of the extruder.
But the advantages of ERMO can also be used for the addition of fillers with particularly low bulk density – also here, the largest possible free cross sections are needed for the supply of such materials.
Another example of application are processes in the field of reactive extrusion. For their successful execution an extension of the dwell time or an enlargement of the reaction surface or of the volume are required.
Like all other components of the modular ENTEX system, several ERMOs can be used in series or at separate positions of a production line – in addition, there are various supplementary options such as side feeder, injection and degassing openings.
For more information about ERMO please contact our service department or you are welcome to use the following contact form.
One Planetary roller extruder replaces 28 twin screws
with respect to the gaps between the kneading elements!
Enclosed find our PDF with more information.