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industries truck | Truck, LCV and special vehicles |
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The use of SMC and BMC for exterior body panelsSMC and BMC are widely used for exterior body panels.Examples are the cabins of various trucks from all brands such as Renault, DaimlerChrysler, MAN, DAF, Volvo, Scania and VW. The applications range from front panels, bumper systems, air deflectors, step, toolboxes and roof spoiler up to side protection and side spoilers. 
The use of SMC and BMC for engine and functional partsMost of the demands for a state of the at truck relate to either energy demand over life cycle and sound emission control. Specially with the stringent regulations for Austria and Switzerland noise becomes the challenge for the high powered engines of today. SMC/BMC parts on the engine drastically reduce the noise due to much better sound reduction properties as compared to steel or aluminium.Therefore oil sumps, valve covers, driving shaft cover etc are used. The oil sump has to be strong enough to carry the engine when it is demounted from the truck for repair and is standing on the ground.  Other very challenging applications utilizing major SMC benefits are side steps for trucks and vans. Both parts use the design freedom, stiffness and integration of functions like areas with different thickness, pigmentation and different surface design. Those parts were really designed for SMC. 
Features of SMC/BMC/CIC parts:
SMC can be painted on the body-in-white. SMC can be used in hybrides with sheet metal and aluminium. SMC can reduce the total weight of the vehicle. Weight reduction by using SMC partsAn important benefit is the weight reduction of parts which allows better fuel economy or no need for redesigning platforms when new cars get heavier by added comfort.SMC parts can reduce the weight of a system by 25 % by using SMC 0400 or even more by using SMC 0420, AdvancedSMC or CarbonSMC. Concept of an exterior partFront panels are designed usually as a one piece part with no inner-reinforcement only the outer shell. The grille area can be integrated or as also applied in some models it will be assembled into the front panel as an insert part made from thermoplastics. The most important reasons for those elements in a truck´s cabin are the excellent corrosion resistance and SMC´s inherent stiffness.The one part design has a visible side with a surface quality like steel while the back side has stiffening ribs and bosses for assembly purposes. In the moulding process certain parts such as threaded bushings etc can be moulded in. This integration of fixing elements drastically reduces the cost of post moulding operations. 
Cost comparison SMC vs sheet metal vs RTM. One part design.
Hybrid with sheet metal and aluminiumDue to the same CLTE of steel and SMC hybrid solutions are easily sensible and often in use. This is also the case for the side door step of the Mercedes and Dodge Sprinter. Here the upper side is textured to allow non slippery surface conditions. Underneath the part is reinforced by strong ribs to allow a weight load of 1 ton in case somebody puts some heavy part down onto the step when loading the vehicle. Most truck bumper sytems are made from SMC using combined tooling to serve different models and save tooling cost. An example is the design of a bumper system using 2 corner pieces and a middle bar. End of life of vehicle The ELV regulation of the EU requires a detailed evaluation of parts used on the vehicle regarding ecological behaviour and recyclability. Therefore a decklid concept was evaluated under the parameters of an eco balance and three models were compared to each other: aluminium, sheet metal and SMC. SMC shows the best eco-efficiency.  eco efficiency analysis.pdfTo meet the demands for recycling the European Composite Recycling Company (ECRC) was established in Brussels to develop recycling solutions for composite parts. 
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