machinery feature | Lab-scale extrusion Feddem
exhibited a laboratory
extruder at K2016, which it sold directly after the show
From the extrusion die, the tubing entered a MedVac vacuum cooling/sizing tank, where it passed through an ultrasonic wall-monitoring fixture. At it exited the cooling/sizing tank, the tubing passed a Zumbach 3-axis OD gauge, which provided closed-loop dimensional control, as well as displaying a profile of the tapered tubing in real time. Finally, it passed through a MedLine puller/cutter that helped move the tubing down the line and cut it precisely to length. “Precision, repeatability and elimination of process variables are the features that clean-room processors demand,” said Bob Bessemer, Conair sales manager for medical extrusion. “Everything on our demonstration line – extruder temperature and melt-pressure control, melt-pump RPM regulation, water-temperature control, on-line gauging, closed-loop control of puller speed, and even servo adjustment of puller-belt gap – is geared toward ensuring that tight tolerances for OD, ID, ovality and concentricity are maintained.”
Pilot sale At K2016, Feddem exhibited a FED 26 MTS pilot plant station extruder with enhanced wear protection – and ended up selling the model directly to a visitor. Depending on the area of application, the FED 26
MTS can achieve production rates of 10-150kg/h – which is what particularly impressed the buyer, according to Feddem. “Thanks to its modular design, the extruder can be
extended in just a few steps – from 32 D to 42 D, 52 D, or more,” said Dieter Groß, managing director of
Feddem. “The entire electrical system is inte- grated into the frame and the machine stands on castors, making it mobile and easy to move.” Because the extruder can be configured to customer
requirements, it is suitable for use in a broad range of applications, said Groß.
Plastic synthesis Germany’s Fraunhofer Institute for Structural Durability & System Reliability (LBF) has set up a ‘kilogram lab’ that enables laboratory syntheses to be scaled up. The lab includes
reactors and autoclaves with volumes of up to 20 litres, allowing LBF scientists to carry out polymerisations and organic
syntheses under different conditions. The products obtained can then be examined. Fraunhofer LBF says that while a few grammes of
additive, monomer, excipient or polymer are usually enough to examine the physical, chemical, or thermal properties, larger volumes are needed to explore applications, particularly in terms of practical parameters like mechanical properties, durability, look and feel. The new laboratory enables the synthesis of a wide
variety of substances at kilogram scale, allowing them to be processed further at the in-house applications laboratory and provided for corresponding testing.
Click on the links for more information: ❙
www.entek.com ❙
www.conairgroup.com ❙
www.davis-standard.com ❙
www.zumbach.com ❙
www.feddem.com ❙
www.lbf.fraunhofer.de
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