Inline production of multi-material pultrusion profiles
Themes: Building & Construction, Leichtbau
Like no other manufacturing process in the composite industry, the pultrusion process stands for the series-capable and cost-efficient production of highly loadable profile structures. In more than 60 years of development, the process has evolved from various materials (phenolic, polyester, polyurethane resins, etc.) to further process variations (e.g. radius pultrusion). Within the framework of a project within the Infra-pro funding programme of the Sächsischen Aufbaubank, work is currently in progress on the further development of processes towards multi-material lightweight profiles. The aim of the research work is the series-capable combination of pultrusion-typical endless fibre-reinforced plastics with other materials (e.g. metals) in one process step. These are fed together in front of the pultrusion tool and combined with the hardening of the plastic to form a finished composite part. With the aid of
specific pretreatments, covalent bonds are built up between the different materials, which are intended to bring out the respective material advantages of the individual materials. The resulting property profile of the multi-material structures is characterized by a lower mass and simultaneously higher anisotropic stiffness and strength values compared to monolithic metallic profiles. At the same time, the high plastic forming capacity in the case of a crash as well as the established long-term stable connection solutions (e.g. screw connections) of metallic structures can be used. By further developing the pultrusion process, new areas of application can be opened up in the area of the currently steadily growing importance of multi-material-based lightweight construction. From crash-relevant hybrid side sills in vehicle construction to lightweight profiles for plant and construction applications.