LFTs | TECHNOLOGY


Above: Leistritz twin screw compounding equipment is used in this Dieffenbacher LFT-D produc- tion system


The company claims a key benefit of the FDC


process is the flexibility it gives to optimise fibre length in the final part. According to Frank Fischer, Senior Application Manager Composites, relatively short fibres are sufficient to improve E-modulus or stiffness. Where improved strength is required then long fibres equal to or greater than the critical fibre pull-out length are required. German press maker Dieffenbacher is cooper- ating with twin screw extrusion machinery maker


Leistritz in a project for direct moulding of LFTs from recycled materials. Dieffenbacher is currently building a high throughput production line for manufacture of large-sized LFT-D components in the US using Leistritz extrusion technology. For typical LFT-D processes incorporating 30-50% fibre content, two twin-screw extruders are used. Polymer and additive components are fed gravimetrically into the first extruder where the melt is plasticised before transfer to the second extruder, where a special die is used to achieve optimal incorporation and impregnation of the continuous glass fibre rovings. In the current development project, however, the required fibre content is only 10-20%. Leistritz Regional Sales Manager Federick Huck says this means the process can be carried out with single-machine technology. LFT-D technology is also being used in an LFT


project between Lanxess and Kautex Textron to develop a manufacturing solution for battery housings for electric vehicles. The companies have developed a near-series technology demonstrator component with length and width of around 1,400mm as part of a feasibility study. The goal was


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STRUKTOL COMPANY OF AMERICA, LLC | Stow, Ohio 330.928.5188 | CustomerService@struktol.com


| USA CustomerService@struktol.com | www.struktol.com


IMAGE: DIEFFENBACHER


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