GRANULATORS | TECHNOLOGY
Working to make the cut
With the drive to circularity, moulders are looking to granulators to incorporate high-quality
regrind.Peter Mapleston looks at some of the latest granulator developments and how Covid-19 has affected business
The granulator is more or less a staple of any injection moulding operation. No matter how good the production, no matter how many moulds have hot runners, sooner or later there will be some scrap that can be reused. Granulating in-house is the best option, making it possible to feed material straight back to the injection machine hopper, or to a central collection station. Granulators are pretty simple devices, and the
core technology hasn’t changed much over the years, but improvements do continue to be made, mostly when it comes to things like sound-proofing, controls, and communications. Technology groups have reported on new product developments and how Covid-19 has affected business. CMG Granulators has launched a new series of small high-perfor- mance beside-the-press granula- tors. It says the G17 units “contribute to obtaining the highest degree of productivity, regrind quality (homogeneous particle dimensions and absence of dust), efficiency of operation and
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the best application flexibility.” In their standard configuration, the G17 granulators are applicable for use in injection moulding and blow moulding operations; modified ET1 and ET2 versions are suitable for extrusion operations. Output capaci- ties range from 5 to 90 kg/h. The G17 granulators can produce fine regrind, with dimensions similar to those of virgin pellets. Giorgio Santella, Managing Director at CMG, says this has the advantage of enabling mixing higher percentages of the regrind into virgin material with no influence on the quality of the finished product. “Small capacity systems, injection moulding machines or extruders,
are equipped with small diameter plastification screws, unable to process granules with dimensions exceeding
Left: CMG’s G17-38 has a throat measuring 380 x 310mm
January/February 2022 | INJECTION WORLD 37
IMAGE: CMG
IMAGE: SHUTTERSTOCK
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