MACHINERY | RECYCLING AND GRANULATORS
The G17 can also be configured with solid type
staggered rotors or open type models. Depending on the application, the most adequate rotor configuration is provided. Also, both rotor and stationary blades are adjustable, to obtain a high precision of cut.
Facility expansion Granulator manufacturer Hellweg Maschinenbau is building a new production shop at its Roetgen headquarters. The facility will provide around 500m2
of
Above: The ET1 and ET2 versions of CMG’s G17 series granula- tors are
suitable for extrusion applications
processed very gently. The recycling concept has already impressed
irrigation system producers in the USA, Israel, Italy and Mexico. They operate recycling plants with throughputs of 100-500 kg/h and reuse the recycled pellets in proportions of up to 20% to make thin-walled tapes and thick-walled pipes. However, practical tests have shown that even higher proportions of recycled pellets could be used in the end product, said the company.
Small scale Right:
Hellweg’s smart control system, Granumaster, measures and stores process parameters such as power consumption
Many other suppliers have developed recycling and granulating equipment that variously helps companies to re-process scrap in various ways. CMG, for instance, has launched a new series of small-sized granulators. The G17 series can be applied to a number of industries, and the ET1 and ET2 versions are suitable for extrusion. Granulation capacity range is 5-90 kg/h and have slow rotor speeds (of 155-275rpm). The company supplies granulators and shred- ders for six industrial application areas, including extrusion. It says that common features that its customers look for are energy efficiency, minimal maintenance high levels of operational stability – along with reduced deterioration, especially for heavy duty applications. G17 granulators are designed to give homoge-
neous regrind shape and dimensions, while generating minimal dust. One extra benefit is the ability to produce regrind with very small dimen- sions, says CMG. The advantage of this is that a higher percentage can be added to virgin material without influencing finished product quality. Small capacity systems, including extruders, can be equipped with small diameter plastification screws. The G17 granulators produce regrind which is dimensionally comparable to virgin pellets.
14 PIPE & PROFILE EXTRUSION | April 2021
www.pipeandprofile.com
additional manufacturing space. With a height of 11 metres, it will have enough space for assem- bling large granulating systems. “We urgently need the extra space to accelerate handling of the large volume of orders which we have won since K2019,” said Mark Hellweg, the company’s managing director. “We have also been seeing a trend toward large and complex ma- chines. In future, we will be able to assemble and test these in our own facilities and ensure trouble- free commissioning on our customers’ premises.” Hellweg added that 2019 delivered the highest sales figures in the company’s history. “Expansion had been on the cards for some
time,” he said. “The pace of development has slackened during lockdown, but if things continue at their present level we will be able to celebrate record results.”
Smart control The company has also developed a range of granulators with a digital Granumaster ‘smart’ control system. This enables networked communi- cation of the machines with upstream and down- stream components, as well as with operators, in line with Internet of Things (IoT) principles. Hellweg calls the Granumaster a digitalisation first
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