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Advanced Engineering 2018

Dieffenbacher to Deliver an HP-RTM Press to Daimler

21 March 2011

Dieffenbacher has received the order from Daimler AG to deliver a press for series production of CFRP components. From 2012 onwards, the COMPRESS PLUS 2500/2200 will start producing lightweight parts to be used as reinforcing components in the Esslingen plant.

The central component of the HP-RTM process is the hydraulic HP-RTM press with press forces up to 25,000 kN depending on the internal mould pressure as well as the size and complexity of the component. The Dieffenbacher short-stroke system means the HP-RTM press is particularly energy-efficient, especially when short forming strokes and long ram travel values are involved. It is possible to increase efficiency by up to 50 percent compared to conventional press technology. A high degree of ram parallel alignment and identical deflection of the bolster and ram are essential for the HP-RTM injection process and, ultimately, for component quality even with off-center forces. The design of the press, the active parallel control system and special control technology ensure that the press bolster and the ram always remain in parallel alignment with accuracies down to hundredths of a millimetre. The component quality can be improved further by pressure intensification at the end of the high-pressure injection process.

Dieffenbacher regards CFRP technology as setting an important milestone for lightweight concepts in the automotive industry. At the same time, CFRP components make it possible to increase the rigidity of the vehicle body and to provide greater safety in the passenger interior/exterior structure. Dieffenbacher is pushing ahead with development of innovative process and machine concepts in the area of HP-RTM, and is being supported in this by its cooperation partners Fraunhofer ICT and KraussMaffei.






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