Hard Shell,Lightweight Core: Rapid and Cost-Effective Sandwich Parts with PU Resin and PET Core Foam

摘要

The combination of fiber-reinforced face layers with a lightweight foam core combines high strength and stiffness with low part weight.However,when processing,it is anything but easy to combine anisotropic FRP materials with lightweight,cost-effective foams.A tailored material system now makes processing by high-pressure resin transfer molding possible at low temperatures and pressures,with short cycle times.The automotive industry must reduce the pollutant emissions of its vehicles and satisfy requirements regarding economy,electromobility and vehicle performance.Both these aims can be satisfied by new,lightweight materials and processes.With their high specific strength,and broad freedom of design regarding shape and material construction,fiber-reinforced composites(FRP)are appropriate lightweight construction materials,especially in sandwich construction with foam core layers.In cost-sensitive automotive engineering,in particular,a major role is played not only by the mechanical properties of the part but also by the cycle time and resulting manufacturing costs.