More speed in pultrusion: further development of the pultrusion process offers more productivity and efficiency for straight and bent profiles.
More speed in pultrusion
In the pultrusion process, fibers (e.g. glass, coal, basalt, aramid fibers) are pulled off from a fiber rack and pulled across fiber guides through the injection box using an extractor device.
The metering machine heat-balances and mixes the matrix material (polyurethane, epoxy or polyamide systems) in a mixing head in optimal process technology conditions and conveys the mixture into the injection box.
In the injection box, the fibers are saturated with an optimum level of highly reactive matrix materials at an inner pressure of 5 to 100 bar. Then, the final shaping and curing of the profile takes place in various heating zones within the mold (e.g. 100 to 250 °C).
They can either be removed using an electro-pneumatic extractor device or a belt/crawler haul-off.
Then the profiles are cut to the desired length using a saw and can be wound or prefabricated.
The higher-level system control regulates the process technology parameters and the haul-off speed.
KraussMaffei and its partner network are continuing to develop pultrusion technology by taking steps such as increasing the haul-off speed significantly without negatively affecting the required high quality standards.
Source: Thomas GmbH + Co. Technik + Innovation KG