MIXERS | MACHINERY
Getting a better mix
Recent developments in mixing technology include high- speed models, ones that provide extra melt cooling and others that strive to minimise energy use
Mixing is a critical process in extrusion, ensuring that materials – including resin and additives – are efficiently blended in the correct proportions. In common with other equipment, there is an increas- ing focus on high speed and energy efficiency. The Caccia Myx division of Plantech-CST – part
of Syncro of Italy – has developed its third genera- tion of high-speed mixers. At this year’s Plast trade show in Milan, the company presented a project for a complete mixing and cooling system for PVC that combines the expertise in engineering with technical features from Caccia Myx and Plantech-CST. Paolo Gasparotto, general manager of Syncro Plantech North America, says the Heating-Cooling Mixer RCH+RCC meets the highest requirements for preparation of rigid or plasticised PVC dry blend, guaranteeing good blend quality and high throughput with easy production changes and maintenance. The RCH mixers are used where friction mixing is required. The tools rotate at high speed to induce heat into the mixing material by friction, applying only as much energy as is needed while ensuring gentle material treatment and good dispersion of the various components. RCH mixers
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have a modular design and include an inclined discharge valve that ensures efficient emptying of the mixing vessel. Syncro has also developed the HP Horizontal
Cooler RCC unit for rigid or plasticised PVC dry blends, featuring agitators engineered to ensure optimal contact of the product with the cooling surface. This mixer line now has a newly designed structure and water-cooling circuit to maximise efficiency. It also features adjustable blades to reduce
product deposits in the cooling chamber. RCO horizontal coolers are used where large capacity and good cooling efficiency is required. They feature a special ‘U’ design that allows cooling and homogenisation of several batches from the mixer.
In many applications RCO horizontal coolers are used as a holding vessel. The RCV Vertical Cooler mixers are used in cases of restricted space, where ease of cleaning combined with cooling efficiency are needed. The company also offers the RCT Container mixer as a versatile solution where good homogenisation, colouring and dispersion quality are required.
Main image: The P1 cooling mixer from Promix ensures efficient mixing and cooling of the melt
� November/December 2023 | PIPE & PROFILE EXTRUSION 27
IMAGE: PROMIX
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