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Planetary Roller Extruder

ENTEX Rust & Mitschke is a German Equipment Manufacturer, Supplier of Planetary Roller Extruder for Compounding of Elastomeric, Thermoplastic and Thermoset Materials, Fiber Composite Materials, Rubber, Adhesives, Food, Pharmaceutical. Materials Supplier of single Planetary Roller Compounder up to Turnkey Extrusion Systems, Process Development.

Products

The ENTEX Planetary Roller Extruder / Mixer has through research and developments, found acceptance in a wide area of applications over the past years.

Below is listed an assortment of products, processes, and fields of application

Processing of Rigid to soft and paste PVC, e.g. calendar feeding/pelletizing/coating process
Processing of thermoplastic plastics, as well as alteration of the modular structure
Processing of master batches particularly in the area of highly filled applications e.g. pigments, aerosiles, carbon black and conductive carbon black
Production of Nano-Tubes, also with high parts of filler material
Processing of Wood Plastic Composites, particularly with high portions of wood, 70-80% and fiber strengthened materials (up to 80%)
Powder coating processes based on all resins (epoxy, polyester, and acrylic), which are commercially available. Special advantages in the area of thin layer and low temperature processes, as well as processing of aspiration material
Processing of elastomeric formulations (e.g. Natural rubber, EPDM, SIS) and materials of different compositions as well cross-linking of granulated surfaces and direct cross-linking
Devulkanization processes in the area of EPDM and Natural rubber, particularly for the processing of rubber wastes.
Processing of all adhesives, e.g. based on elastomeric, thermoplastic plastics formulations
A process where the Mooney viscosity and rubber mastication is controlled through a modular constructed planetary roller extruder.
Manufacturing of duroplastic masses with varied parts and filling material.
Manufacturing of Prepex masses and masses with short reaction time
Processing in the area of chemical reaction processes of either endothermic und exothermic reactions
Food Processing, e.g. Grain roasting/malt process for use in alcoholic and non alcoholic drinks/processing of cacao-sugar masses/processing of meat – as well as bakery products/ice cream/processing of coffee-products etc.
Processing of hydrophobic und lipophobic substances in the area of the pharmaceutical Industry, as well starch processing
Processing of sludges with addition of liquid components (e.g. Tenside, plastic waste, oil) for a later thermic use in the combustors
Processing of animal food
Processing of hyposcopic and thermoplastic materials und recycling materials among vacuum incl. vacuum dosing unit (e.g. PET-material) Saving of complex pre-drying processes
Processing of cellulosic materials
Processing of paper/recycling paper with additives
Processing of detergent-formulations
Processing of thermoplastic elastomere masses (e.g. TPO)
Processing of Linoleum-masses
Use as degassing extruder and thin layer evaporation
Processing of powdery pigment dipping
Processing of expanded thermoplastic plastics
Nano filled formulations
Use as cooling extruder for high-viscosity liquids
Processing of bitumen masses (e.g. carpet back, stretch marks for road making and plant construction)
Manufacturing of foam materials based on thermoplastic plastics

We can submit you the exact design after processing tests with your material in our technical centre.

Application Range

For the colour industry:

With regard to the production of powder coatings ENTEX is pushing the progress and sets the standard of tomorrow. For example by means of the laboratory extruder. Whether for trials with extreme formulations or the production of the smallest quantities: flexible, economical and reliable in every respect. These are the decisive advantages of the overall technical plan of ENTEX pointing the way ahead.

For the plastic processing industry:

For example, the ENTEX extrusion and film production units. The roller system optimizes the processing of thermoplastics, elastomeres, thermoset plastics and even recycling material into high-quality products. The productivity of the flexible system and the quality of the results work out the calculation.

For the chemical industry:

Regarding the reaction and compounding technology ENTEX made a big step forward for example with its continuous, thermodynamic planetary roller mixer for endothermic and exothermic reactions of the different material and phase systems. Extremely adaptable because of its modular construction, reliable and therefore fit for the future.

For the food industry:

For example the production of ice cream, chocolate and other thermally sensitive formulations, it is possible without any problem on an ENTEX extruder with total special steel processing part. Especially for bread, cake and pastries, dairy products, starch and sugar possibilities are unexpectedly opening-up . Due to the modular construction there is also the possibility of adding colour and flavour stuffs in various quantities and at several different places to the food products.

Scale for Plastic

Blending Technology for the Plastic Industry

The Requirement

During the recent decades the plastic processing industry has developed rapidly. The foundation-stone of this development have been and still are the diverse technological innovations which focus more and more on the required properties. This has resulted in an increase in the variety of raw materials.

ENTEX have recognized this at an early stage. We develop and perfect equipment which are to the individual requirements of the industry. High quality products can only be produced reliably and economically by creativity and competence.

A clear example: We received an inquiry from the plastic processing industry regarding the solution of the following problems when processing TPU. There, a production line produced a thermally very inhomogeneous extrudate. This caused not only long starting times, but also very often long dead times during cleaning. This resulted in material damage and a reduction in quality and quantity of the final product.

ENTEX replaced a conventional 2-stage-system with processing and discharge extruder by a single-stage-planetary roller extruder in modular construction (M2). Now the customer is able to produce a thermally homogeneous extrudate and is able to reduce the starting times to 20 per cent.

The excellent self-cleaning property of the ENTEX planetary roller extruder guarantees improved economies: long service life and short batch changes, a large scale of material processing without mechanical reset and pigmentation directly into the extrusion process. By this smaller equipment, being much easier to handle, the output capacity of the total production line can be doubled.

Therefore, potential customers will become satisfied customers.

The Solution

A possibility of direct feeding and compounding in front of the calender consists of a two-stage extruder. Here, the melt is plasticized, dispersed and homogenized in a planetary part. Via a vacuum chamber the outcoming banks get discharged. And by producing a vacuum and due to the heavily rugged surface of the material the volatile matters of the bank will be taken off. The second stage essentially serves as the pressure generation device. Due to the different flow rates in the discharge screw, however, non-homogeneity can arise with sensitive materials. These are produced by different shearing forces, which are not evenly dispersed through the whole material.

Still today, this system is used for pelletizing and at the calender for special feeding tasks.

ENTEX is following the philosophy, that the shortest way is the best way. The art of modern processing technique is to leave out expensive intermediate steps that damage the material.

Due to the modular construction, in most cases the discharge stage can be omitted.

By connecting several modules, not only the processing length is quadrupled and thus the bandwidth of the materials to be processed essentially enlarged, but also degassing of the plastificate during compounding is possible without an intermediate stage. Measurement of pressure and temperature as well as the injection of viscous components is possible by the same method. The ENTEX radial pelletizer with slot liner allows a direct feeding of the calender in an optimal manner. For this reason an ENTEX planetary roller extruder is located in front of the world biggest calender.

Conceived Innovation

The invention of the planetary roller extruder was the initial ignition with regard to a rapid development of extrusion technology. ENTEX made the decisive step into a new dimension during the Eighties by consequent further development and perfecting of this system. The planetary roller extruder represents the principal item of compounding technology, controlled by the latest process technique.

The principal item of the planetary roller extruder is an ENTEX planetary gear with an extreme toothing width and a helix of 45°. At the rotation of the central spindle the planetary spindles are rolling on the central spindle and the cylinder assembly and rotate like planets. During this process the material will be caught and by the plunge of the spindle teeth into the corresponding tooth space the material will be drawn-out into thin layers and brought forward by means of the helix. All steps of the development are based on the new production process of electro-carbon machine.

Modular system with extremely thin wall thickness with possibilities of pressure and temperature measurement, injection of viscous components and the degassing between the modules allows compounding technology in new dimensions, unknown until now.

The variation in the diameter of the stop ring as well as the combination of the planetary spindles from module to module allows the adjustment of the system to nearly every compounding process. The invention of radial pelletizing, based on the planetary system and use of the fundamental advantages of this system facilitate the thermally most gentle pelletizing technique.

Based on the minimum possible L/D-ratio materials can now be pelletized which could not be pelletized before. Dissipation of energy into the material, caused by hole plates, can be nearly excluded.

These innovations are to your technical and economic advantage.