ENTEX the planetary roller extruder: Kneaded - not stirred!
Insulation materials (elastomer foams) are becoming more and more important in the elastomer market range as well as insulations, profiles or adhesives. In the past, even rubber masses have been processed nearly exclusively by means of discontinuously working internal mixers. They have been processed to profiles, sealing strips or products similar to tubes, with and without fabric inlay, via roll mills and roller combinations or by pin extruders. Of course, flucuations in quality cannot be avoided when using the discontinous process.
The batch process always leads to great fluctuations in temperature. Of course, many formulations have been adjusted to this process. Also here the planetary roller extruder offers a new dimension. Up to 25 solid components - even more - can be supplied to the continuously working process of the planetary roller extruder and up to 10 liquid components can be injected. A planetary roller extruder with three roller parts in two-stage design is in operation since 2001. The second stage is a degassing stage with downstream mixing stage. Here the diameter of the planetary roller extruder is 300 mm, the output capacity amounts to more than 1.200 kg/h. In order to align oneself to the requirements of the market we recommend laboratory extruders. Our customers world-wide complied with this recommendation. The laboratory extruders are equipped in that way that torque, temperature and speed can be collected at any time. By this the continuous compounding is connected with a minimization in risk.
Mistakes in the formulation or supply will be visualized immediately. Opposite to the discontinuous compounding we experience a significant decrease of the risk potential and the emission, because the planetary roller extruder demonstrate a closed system.