MACHINERY | TWIN SCREW EXTRUDERS


Right:


Maximising uptime means making use of remote support and augment- ed reality


technologies at Feddem


of light fillers. Conventional FSB side feeding and FSV side vacuum degassing is still available as expansion options.


Designed to cut downtime during more exten-


sive product changeovers that require an exchange of screws, the company says its double-brush cleaning device type FRE was especially developed for use with figure-8-shaped borings and is now field-proven. It enables efficient cleaning of the bore of the processing section when the extruder is still at operating temperature, eliminating the time wasted for cooling down and reheating of the processing section. “The drive shaft of the FRE now has a modular


design, which allows the length to be flexibly adapted to different process lengths on site,” says Klaus Hojer, Business Development Manager at Feddem. “The protective sleeve prevents uninten- tional contact by the operator and the shape of the transfer gear housing eliminates the transmission of dangerous torque shocks to the drive of the FRE in case brushes get caught in barrel openings. This ensures that the operator is fully protected against injury during operation.”


Expanding capacity


German compounding machinery specialist Coperi- on has forged a close relationship with Chinese compounder Chuanghe, which manufactures plastic compounds primarily for the automotive, household and electronics industries and recently expanded its site at Yangzhou City, Jiangsu Province. The company invested in a total of ten Coperion


Below: Chinese compounder Chuanghe has installed 10 Coperion


compounding lines in its most recent produc- tion expansion


twin screw extruders. The expansion included six STS Mc11


high


models, ranging from a 25mm laboratory model to high output 75 mm model, as well as four extruders from the company’s ZSK Mc18


specific torque machine series. The ZSK models are configured to process PA and include two 58mm models with throughputs of up to 800 kg/h and two 70mm machines with throughputs of up to 1,600 kg/h. The machines are each equipped with


ZS-B side feeders to provide maximum flexibility in compounding of various additives. “We’re excited by the close working relationship with Chuanghe [and] gratified by the trust that [the company] has placed in us with this major order,” said Joanne Shen, Managing Director of Coperion Nanjing. “We are proud to see how the installed machines are already demonstrating their high performance, reliability, and flexibility on a daily basis. We are certain that Chuanghe has paved the way for meeting future challenges with this expansion of their production capabilities.”


Tackling waste Coperion is also to supply a ZSK Mc18


twin screw


extruder and associated peripherals for a 30,000 tonnes/yr chemical recycling plant that Belgian waste management company Indaver is building in Antwerp. The ZSK machine will provide a central role in the Indaver Plastics2chemicals (P2C) process by preparing the plastic waste before it is fed into the reactor. Waste material will pass through the ZSK


extruder’s process section at throughputs of up to 3.7 tonnes/h. The intensive shearing and disper- sion capability of the extruder’s twin screws applies a large amount of mechanical energy to the material stream in a very short period so, in just 30 seconds, the agglomerated post-consumer waste is transformed into a homogeneous melt at up to 350°C. A Coperion K-Tron gravimetric feeder will feed the agglomerated plastic waste into the twin screw extruder while an additional K-Tron gravimet- ric feeder regulates additive dosing. The melt will be uniformly fed directly from the extruder into the continuously operating P2C plant reactor. Coperion says the suitability of the ZSK extruder for use in Indaver’s P2C depolymerisation process has been proved in comprehensive trials at its test centre in Germany. “ZSK twin screw extruders possess numerous advantages especially beneficial


26 COMPOUNDING WORLD | March 2024 www.compoundingworld.com


IMAGE: COPERION


IMAGE: FEDDEM


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