Extrusion International 3-2023

37 Extrusion International 3/2023 per min- ute, with a maximum width of 200 mm, the GH 300 (HD) with 3.0 to 7.5 kilowatt can carry out approx. 30 to 70 cuts/ min., at widths of up to 300 mm. The standard version can already tackle material thicknesses of up to 20 mm. “All crushers of the GH series can al- ways be customised to the specific demands of the user with regard to drive output as well as cutting angle and system configuration. The new hydraulic guillotine is no exception here”, says Christine Rosenberger. Quiet and efficient In practice, the material strand in- tended for coarse crushing is usually deflected below the conveyor line behind the extrusion line follow- ing the longitudinal cut, and fed to the hopper of the guillotine. Its moveable blade then quickly cuts the strand into the desired cutting lengths, which usually occurs without too much noise. The pre-granulated material then falls down from the system onto a discharge conveyor belt or a collection contain- er. From here, it can be directly fed to a hopper granulator for further processing, where it is granulated to the desired target size. To make them easily accessible and safe and optimally adapt them to the width of the extrusion line, the guillotines of the GH series from GETECHA are usually mounted on an adjustment unit. For secondary grinding, the company’s RotoSchneider series provides a large selection of hopper and infeed granulators in different sizes and performance classes. Granulation of thin film residues While the choppers from GETE- CHA are used for the coarse crushing of more or less thick material resi- dues from plate extrusion, the large domain of the company’s foil cutters is the granulation of thin edge trims and chips from plastic foil, paper, textiles, fleeces and similar thin ma - terials. Here, the FS 200 as well as the FS 300 are designed for installation in pipe systems, where they process the material fed at infeed speeds of up to 3,000 m/min. Typical for the FS series from GETECHA are an open rotor, rotor speeds which can be tai- lored to customer’s needs (600 l/min up to 2,000 l/min) and a blade gap between rotor and stator blade of only 20 µm, which enables reliable granulation of even very thin edge trims. Depending on the application, the foil cutters can be equipped with two or four blade rotors, and oper- ated project-related at operating air currents of up to 6,000 Bm3/hwith or without screen. Intelligent and efficient Just like its hopper and infeed granulators, GETECHA also equips its coarse crushing systems project- and customer-specifically with smart in - formation and communication func- tions at Industry 4.0 level.Withgranu- lators from the RotoSchneider range, for example, thanks to state-of-the- art sensor and interface technology and the use of different fieldbus sys - tems, all important machine data can be documented, processed and visu- alised. This improves monitoring, in- creases availability of the production line and provides an overview of the system’s energy efficiency. Author Julius Moselweiß, free special journalist, Darmstadt Getecha GmbH Am Gemeindegraben 13, 63741 Aschaffenburg, Germany www.getecha.de To make them easily accessible and safe and adapt them to the product width of the extrusion line, the guillotines of the GH 200 and GH 300 from GETECHA are often mounted on adjustment units The new GH 300 HYD from GETECHA behind an extrusion line with transversally discharging conveyor belt GH systems of the 200 and 300 series from GETECHA during granulation of edge trims below the discharge roller conveyor of an upstream extrusion line