COLLIN ® Compounders are used for development, compounding and production of polymer formulations of all kinds. A wide variety of processes can run on these machines:

• Dispersion of pigments
• Incorporation of fillers and additives
• Incorporation of fibers
• Blending of polymers and pastes
• Outgassing of volatile components
• Continuous reaction extrusion

The modular processing unit offers maximum flexibility and is designed to permit very fast and easy cleaning. This saves a lot of time and effort in a laboratory environment. These machines can be equipped with up to seven gravimetric metering devices and have a throughput of max. 70 kg/h ab. Exchanging the gearbox easily converts all machines into counter-rotating extruders.

This miniature COLLIN ® Compounder has been designed for bench-top use. The processing unit has an L/D ratio of 18:1. The screws feature modular construction and are assembled from individual elements with different pitches and lengths as well as different configurations (e. g. closely intermeshing, open lengthwise and crosswise, mixing and shear elements). Available barrel elements include a feed segment 6 D long with intensive water cooling, a vented segment 6 D long, electrically heated and aircooled, and a non-vented segment 6 D long The barrel elements rest on a movable support. This support may be moved by hand and facilitates quick cleaning of the processing unit when materials are changed frequently. Depending on the material, throughput ranges from 0.3 to 4 kg/h.

The unique features of these COLLIN ® Compounders include:

• C – clamps for quick opening of the processing unit
• Motorized retraction of the barrel
• Throughput range of 3 to 30 kg/h (ZK 25) and 5 to 70 kg/h (ZK 35)

The recommended processing lengths are 36D to 48D for the smaller machine and up to 56D for the ZK 35. With an appropriate barrel configuration, the following gravimetric metering arrangement is possible:

• Primary feeding of two different pellets
• Side stuffer for powdered fillers
• Three liquid metering devices
• The venting ( outgassing ) zones