MACHINERY | MIXERS
Right:At Plast, Plas Mec showed two flagship
machines – the Combimix-HC and TRR
container mixer
rotors and chamber wall, as well as by the rolling action within the material itself. The company says features include counter-rotating, non-intermesh- ing rotors at synchronous speed, giving a large free volume for material circulation and enabling good distributive dispersion by back mixing. The rotor geometry also enables good dispersive mixing. Modular components make for easy mainte-
nance, while Farrel says the mixer is energy efficient – which helps to control operating costs.
Process specific Lödige Process Technology of Germany offers both horizontal and vertical mixers that operate either continuously or discontinuously. Specific solutions are offered for processes including mixing, homogenising, dispersing, compounding, heating/ cooling and melting – and include the Ploughshare mixer (continuous and batch), continuous CoriMix CM ringlayer mixer, and NOHK wet mixer. Both the continuous and batch Ploughshare
mixers operate on the mechanical generated fluid bed principle. Lödige says its Ploughshare batch mixer offers high quality mixes in short mixing times. Ploughs rotate on the mixer shaft in a horizontal, cylindrical drum, with the size, number, positioning, geometric shape and peripheral speed coordinated to produce three-dimensional movement of the components. The resultant turbulence prevents dead-spots or low-movement zones in the mixing drum and ensures high speed, precision mixing. Lödige says that to prevent particles being squashed against the drum wall, mixing elements are shaped to lift product within the radial move- ment of the mix. In some cases, extra assistance for the mixing elements is required – and separately driven, high-speed choppers can be installed to disperse agglomerations or control granulation.
Right: Mixing specialist Promixon showed a set of large blades for a horizontal cooling mixer during Plast
Cool operators Plas Mec, of Italy showed two flagship machines at last year’s Plast show: the Combimix-HC mixing sys- tem and the TRR container mixer. The first, used mainly for PVC dryblends, comprises a TRM heating mixer and an HEC cooling mixer. The TRR container mixer is a multipurpose unit for applica- tions where production changes are frequent and easy cleaning is very important . Commercial director Massimo Grigolon says Plas Mec has increased its focus in recent years on efficiency, productivity and safe operation. He cites an improved water circuit design with enhanced cooling capacity on the HEC cooling mixer, as well as its new jacket that can withstand a working pressure up to 2.5 bar, typically found in factory closed circuit chillers. “With the Combimix-HC, it is now a straightfor-
ward task to cool more than eight batches per hour of U-PVC dryblend from 120°C to 40°C,” he said. At the same event, Italian mixing equipment
specialist Promixon showed some of the machine elements at the heart of its plants: large blades for a horizontal cooling mixer; and a 2000-L vertical tank with blades for four-stage powder mixing. The tank on display was fitted with two outlets, enabling it to feed two cooling mixers placed on opposite sides. The company, founded in 2013, has many staff with long histories in the mixing busi- ness. It has new offices in Magnago, near Milan, and says it is expanding its team.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.mti-mixer.de �
www.coperion.com �
www.bplittleford.com �
www.farrel-pomini.com �
www.loedige.de �
www.plasmec.it �
www.promixon.com
46 PIPE & PROFILE EXTRUSION | January/February 2019
www.pipeandprofile.com
PHOTO: PROMIXON
PHOTO: PLAS MEC
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