MACHINERY | TWIN SCREW EXTRUDERS
Right:
Xtrutech’s XTS extruders, shown in an 11mm lab version, can be customised for any application
require very good productivity and quality. The modular design is said to enable optimum adapta- tion to different processes. Target applications include reaction, degassing and compounding, as well as recycling. Turkish machinery maker Polimer Teknik has
also stretched its upper capacity limit. Its new Poex T110 model is equipped with a 600kW water- cooled Elin motor, Mayr torque limiter and high torque Zambello gearbox. The company says it can run compounds with up to 83% mineral filler at up to 2,500 kg/h. Last June, Chinese compounding machinery
maker Cowin delivered a CHT75D twin-screw extruder with water-cooling strand pelletising to a German client. Covid restrictions were still in place in China when the order was received so visiting Cowin’s factory in Nanjing was not possible and all consultations with the production team were by real-time video conferences. The custom-built CHT75 co-rotating twin-screw
extruder provides a production capacity of 800- 1,000 kg/hr, and is equipped with Siemens 250kW main motor, Cowin’s own patented high torque gearbox, and a water-cooled strand pelletising system. The Cowin after sales team managed set-up and provided customer training via video link. UK company Xtrutech, which has been active since 2002 and also has a secondary location in Philadelphia in the US, designs and manufactures the XTS line of twin-screw extruders and XTS range of ancillaries. A key element in its offering is the ability to tailor equipment to individual customer needs. “Our aim is to create highly efficient extruder
Below: Coperion’s OEE (Overall Equipment Effectiveness) cockpit provides a window into the compound- ing process
lines that are both simple to use and easy to maintain,” says Ryan Moore, Xtrutech MD. “The XTS19 is one of our laboratory extruders, perfect for thermoplastics, medical plastics, biopolymers, fine chemicals and pharmaceuticals. A typical line for this extruder will include a choice of feeders such as top, side and vibratory tray. This allows our customers the freedom to create an extruder line according to their preference and processing requirements,” says Moore.
The XTS19 extruder is said to be suitable for running small batches up to 20kg, dependent on the formulation, with barrels available up to 50L/D. All XTS extruders feature a clamshell barrel design for easy access to the screws and shafts, and all screw elements are individually segmented to improve the speed and efficiency of replacements. Typical XTS lines are configured with a water
bath and strand-cut pelletiser but other options are available. “To make our line more accessible for water soluble applications such as biopolymers, we can offer air cooled conveyors as an alternate method of cooling,” says Moore. Italian compounding extruder maker Maris
recently published details of an unusual recycling project it has worked on using a twin screw extruder to thermo-mechanically devulcanise EPDM rubber from recovered automotive gaskets. The project used a 58mm twin screw extruder from the company’s recently introduced EvoRec recy- cling machinery range to devulcanise and degas the EPDM before feeding it to a single screw extruder and screenchanger to cool, filter and extrude the recycled rubber strip. The system is capable of handling up to 120
kg/h of sulphur-vulcanised EPDM. According to the company, LCA analysis has shown that the climate change impact of recycled EPDM produced using the system is one third that of virgin EPDM, largely due to resource efficiency.
CLICK ON THE LINKS FOR MORE INFORMATION: � IPS
https://pelletizing.de �
https://feddem.com �
https://entek.com �
https://extruders.leistritz.com/ �
www.coperion.com �
www.polimerteknik.com �
www.kraussmaffei.com �
www.cowinextrusion.com �
www.xtrutech.com �
www.mariscorp.com
48 COMPOUNDING WORLD | March 2023
www.compoundingworld.com
IMAGE: COPERION
IMAGE: XTRUTECH
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