Reitruder: Modules

		1  Drive unit 2  Dosing unit 3  Temperature control 4  Barrel venting 5  Operation 6  Barrel 7  Screws

1 Drive unit

The drive unit consists of a high-power, low-noise gear with integrated torque divider which is connected to the AC or DC motor by means of a clutch (in the case of the RZE 43, by means of a belt drive gear).

2 Dosing unit

Reitruders are equipped with different dosing units, depending on customer requirements. By using volumetric or gravimetric dosing units, the range of options for the respective formulation is dramatically increased. The gravimetric dosing unit additionally permits continuous weighing of the raw materials and a constant melt throughput.

3. Temperature control

The division of the barrel and screw into zones depends on the production process required for the specific product. This guarantees a precise temperature profile across the entire length of the barrel. The temperatures of all barrel zones are regulated individually. For heating, resistance heater bands are used; for cooling, air or fluid media serve as heat transfer medium.

4 Barrel venting

In the venting area, the screw channels of systems employing co-rotating, closely intermeshing screws are only partially filled with material. This permits exceptionally efficient single-stage or multi-stage venting. The vacuum unit, together with the separator, is installed in the extruder frame and is readily accessible, like all elements requiring service.

5 Operation

The control and monitoring unit is readily accessible and easy to watch. This facilitates optimal operation with simultaneous product monitoring.

6 Barrel / 7 Srews

The most important component in every Reitruder is the barrel and screw assembly. Its quality and design, which are carefully matched to the complex combination of the barrel, screws and raw material, have significant influence on the service life of the Reitruder and the quality and consistency of the final product. The Reitruder is designed on the modular principle. The barrel and screws can therefore be assembled in any combination to construct a plasticising unit with raw material infeed and venting. The two parallel, co-rotating screws closely intermesh and are self-cleaning. They are divided in segments. This enables the screw geometry to be adapted to the respective application. The order in which kneading and mixing elements are arranged can be freely selected, depending on the formulation. The screw segments and screw shaft are form-fit. Therefore, individual segments can easily be replaced and thus ideally adapted to the raw material to be processed.

© Reifenhäuser EXTRUSION GmbH & Co. KG / 2006 > Imprint...