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The MIXACO Multitool can be adapted to individual mixing specifications
of caking of heated materials; the required high level of dispersion and homogenization; and the need for gentle handling to prevent damage to sensitive pigments and aggregates during the mixing process. The specialists are particularly successful with new solutions for cold mixing processes, in which additional heating has been significantly reduced. Gentle mixing combined with high crushing and dispersion qualities are now no longer a contradiction in terms. The laws of physics mean that the transfer of energy to the mixing product cannot be entirely prevented. With conventional systems, material temperatures can rise by up to 5 or 10 degrees per minute of mixing time. This often not only has a negative impact on mixing quality, but also results in considerable additional time and effort for cleaning the sticky, caked material. MIXACO’s Multitool is a groundbreaking, modern mixing solution. Thanks to its innovative mixing tool design, with a new size, shape, rotation speed and positioning in the mixer, significantly less energy is transmitted to the product during mixing. As a result, the temperature increases by only 0.5 degrees per minute of mixing time. Using this innovative approach, MIXACO has developed a highly diverse, broad range of product-optimized mixer configurations which often achieve considerably better pre- mixing results. Solutions such as the Multitool offer particular benefits for master batch
manufacturers who would like to work with cold pre-mixes and use materials with low melting points. The right pre-mixing solution often works
wonders,” says Matthias Tölle. “Especially in the field of powder coating, there are applications in which significantly better throughput on the extruder was achieved by a feeder-optimized crushing performance. A combination of low thermal transfer, individual and precise coordination of mixing quality and reduced mixer cleaning times enable significantly better utilization throughout the entire process chain. Ultimately, this can be seen in the increased extruder output and high quality of the product.”
Faster, Easier Cleaning A further important aspect is the degree of contamination of the mixer after mixing, especially before a recipe change. Particularly where color pigments are involved, it is vitally important to minimize the accumulation of caked material in the mixing container and on mixing tools. It is often necessary to find a compromise when using conventional systems. On the one hand, a relatively high minimum rotation speed is required to achieve the desired level of comminution and homogenization; on the other, faster rotation also means higher thermal energy transfer and therefore greater product build-up on mixing head and tools. The container mixer, which was developed
by MIXACO in 1965, has since become a common solution to reduce cleaning time and effort, improving the efficiency of in-house logistics before and after mixing in comparison with stationary high-speed or universal mixers. The container enables the charging of material in one location, its transportation to the mixer for mixing and then transfer to the next processing station directly after mixing. The mixing head and tools can be cleaned more rapidly, leaving the machine ready for the next batch in a very short time.
A Solution for Color Pigments The innovative, patented mixing concept of the MIXACO Multitool unites all the benefits of a container mixer. An extremely slow-running conveyor tool transports the material gently to the fast-running chopper. The very high circumferential speed of the chopper achieves a good comminution of the components. The conveyor tool feed ensures a continuous exchange of material at the chopper, guaranteeing an even, homogeneous comminution and distribution of all materials involved in the mixing process. At the same time, only a minimal amount of thermal energy is transferred to the product. In addition, it is possible to individually optimize the comminution level of recipe ingredients by flexible adaptation of tool rotation speeds.
Summary: Mixing color pigments is always a compromise between different objectives, some of which appear to be contradictory at first. Wide-ranging experience with a large number of innovative machine versions and a holistic approach to the entire mixing process are required in order to achieve the optimum result in each individual case. This is precisely why there is great potential in many companies for the optimization of pre- mixing processes, which would increase the throughput and quality of the manufacturing process as a whole. For decades, this holistic approach has been the driving force behind mixing technology innovations from MIXACO.
Cleaning position
MIXACO Germany: 58809 Neuenrade +49 2392 9644 0 MIXACO USA: Greer, SC 29651 +1 864 331 23 20
info@mixaco.com www.mixaco.com
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