DOSING AND FEEDING | EQUIPMENT
Taking a measured approach to dosing
Suppliers of dosing and feeding equipment are finding new methods to achieve consistent performance. Mark Holmes takes a look at some of the latest developments
Precision dosing and feeding of materials to the extruder is a key element of the compounding process. Manufacturers of dosing systems are not only focused on providing feeding accuracy, but are improving the flexibility of equipment to handle a wider range of materials and enhancing connectivity to provide full integration into the developing Industry 4.0 production environment. This article takes a look at some of the latest introductions. Motan-Colortronic has added a
gravimetric dosing option to its Spectroflex V dosing platform. The company describes the Spectroflex V as a modular, flexible wall dosing system capable of handling powder, granules, pellets, regrind, flakes and fibres. Introduced as a volumetric dosing model, the company says the new gravimetric dosing option uses the same base and exchange modules and offers an alternative for customers needing to accurately dose materials with varying bulk density. Throughputs of between 0.7 and 3,000 litres/h
are possible from the Spectroflex V design, depending on the material and model. Modules are easily exchanged, which is said to make material changes and set-up quick and easy. The gravimetric dosing unit is controlled via Motan- Colortronic’s GRAVInet SF system, which is a network-compatible controller capable of support- ing up to two dosing modules. ProTec has developed a new range of high-
precision gravimetric SOMOS Batchmix batch dosing systems. The company says the systems are capable of accurately preparing a formulation of up to six flowable components and holding it ready for further processing. In addition to ensur- ing high reproducibility and being easy to main-
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tain, the company says the SOMOS Batchmix range is characterised by ease of operation and fast material and product changes. The new Batchmix systems are available in three
sizes offering throughputs from 240 to 1,900 kg/h. In addition to pellets and additives, regrind with a bulk density of as low as 400 g/l can also be processed. ProTec says it has completely updated the mechanical and aesthetic design of the new units. Two load cells, one fitted to the weighing bin and one to the downstream mixing bin, are said to ensure reproducible mixing results. The modular design also ensures flexibility in application - for example, the units can be set up for either four or six components with subsequent retrofitting possible. Batchmix models are said to be simple and quick to install on an extruder or stand. A transport unit is integrated into the substructure while the lid of the batch dosing unit can be quickly removed
Main image: Schenck’s ProFlex C
loss-in-weight flexible wall feeders have been designed for compound- ing industry applications (page 46)
August 2018 | COMPOUNDING WORLD 45
PHOTO: SCHENCK PROCESS
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