28/09/2010

www.gupta-verlag.de/polyurethanes

Making large-format, LFI fibre composite parts

The company has now launched its MK 30/36-12 LFI-PUR processing unit. With an output rate of 1,500 g/s, the new large-volume mixing head allows to produce very large LFI parts without complicated set-up effort and even on an existing system. The new mixing head is also capable of handling new fillers, making it possible to produce parts with innovative properties in a simple and cost-competitive process.It's over ten years since that KraussMaffei first launched LFI-PUR systems to produce structural parts reinforced with long glassfibres. Today's systems can handle up to 300 g/s glassfibre. The glass roving is chopped in the cutter unit, wetted in the mixing head with the PU system at up to 1,200 g/s, and simultaneously discharged into the open mould and pressed into shape."As world market leader in LFI-PUR technology, we have the expertise to pursue new paths and to continuously develop our machinery and systems," points out Josef Renkl, R&D Director of KraussMaffei's Reaction Process Machinery division. "Optimised fibre wetting and output rates mean that our customers can now also use their existing LFI-PUR systems to produce much larger formats - in the same cycle time." In the future KraussMaffei is looking to offer LFI processing units capable of rates up to 2,000 g/s.MK 30/36-12 mixing head for large-format parts
KraussMaffei now offers the MK 30/36-12 as mixing head for the production of large-format parts. One of its major advantages is that it can be adapted without problems to operate with already installed systems. Neither the robots nor the control systems need to be reset. Furthermore, the mixing head's weight is in line with existing models. Since its market launch, the MK 30/36-12 has gone into operation with many well-known manufacturers of LFI parts. They're producing parts with up to 50 % glassfibre, depending on the part and the mechanical strength specifications.KraussMaffei's LFI-PUR systems are also able to process combinations of glassfibre and fillers such as chalk, talcum or barium sulphate without problems, according to the company. Filler content in the part can be up to 40 % and glassfibre content up to 50 %. The outcome is parts with innovative material properties. Tight control of the cost of raw materials results in a cost-effective process.

www.gupta-verlag.de/polyurethanes