TECHNOLOGY | MACHINERY GRINDING Wet system for film recycling


Hellweg Maschinenbau introduced its wet grinder – with a forced feed system for film recycling – at this year’s Fakuma. Its new drive concept uses low-


power motors rated from 45 kW to 110 kW. These enable low power con- sumption of the order of 70-90 kWh. This ensures low operating costs – which are further reduced by high


SENSORS Monitoring dosing flow


Woywod has introduced a flow sensor that uses ultrasonic waves to monitor – in real time – whether the screw of a dosing unit is conveying material to the target area. Volumetric and gravi- metric dosing equipment can encounter conditions that prevent material from being discharged from the dosing unit, such as bridging of material in the storage hopper. Even when using


gravimetric routines, there is a variable time offset due to causality checks of the measured values in the gravimetric measurement routines. It can take several


THERMOFORMING Faster production, same size


Kiefel recently launched its new Speedformer KMD 78.2 Premium steel rule cutting machine for the production of thermoformed packaging. The company says that the new model is faster and more precise than its


predecessor, the KMD 78.1. “It not only has improved performance capabilities but also enables fast and simple tool change – making it easy to switch film between production runs and increasing machine utilisation,” said Armin Dietrich, global director of polymer packaging at Kiefel. � www.kiefel.com


40 FILM & SHEET EXTRUSION | December 2023 www.filmandsheet.com


throughputs of up to 5,000 kg of film per hour, says the company. Films in various materials – including


PET and LDPE – are force-fed to the grinders using tamping screws, which means smooth operation even with contaminated input materials. De- pending on the version, the grinders are fitted with five or seven rotary


blades plus two or three static blades. The blades use double scissor-cut technology which helps to raise cut quality and allow dust-free operation. As a result, the shredding process produces optimum quality flakes with even particle size distribution and geometry. � www.hellweg-maschinenbau.de


CPP FILM


Moving into film


IMAGE: WOYWOD


minutes before finding that no material is being discharged – and an error is displayed via the control. This can have serious consequences in the production process, says the company. As an example, the


short-term non-dosing of an


additive such as a catalyst, UV stabiliser or blowing agent could create prob- lems. Toavoid such compli- cations in advance, the material flow sensor is the ideal solution for intensive, fast monitoring of material flow, says Woywod. � www.woywod.de


production South Korean packaging manufacturer JaeKwang has begun producing its own film for the first time – using a five-layer CPP line from Reifenhäuser. Last year, the company installed the line. It has an output of 1300kg/h. “We are keen to take on as many steps as possible in the manufac- turing process ourselves,” said Hong-Soo Kang, CEO at JaeKwang. The companies ensured


that the CPP machine was tailored to meet the needs of the end product. � www.reifenhauser.com


IMAGE: KIEFEL


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