High-Performance Composites

JAN 2013

High-Performance Composites is read by qualified composites industry professionals in the fields of continuous carbon fiber and other high-performance composites as well as the associated end-markets of aerospace, military, and automotive.

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INSIDE MANUFACTURING Step 2 Step 3 The Load Specific Weave (LSW) process begins as a robotic arm removes the mandrel from the workpiece shuttle and feeds it into this Herzog radial braiding machine. Once the braid is done, robots put the overbraided mandrel back in the shuttle. In the RTM workcell, A robotic arm transfers and precisely locates the braided carbon sleeve into the left tool cavity of this female matched metal mold. A special two-component resin is injected and the composite tube is cured. In the Trim cell, a 6-axis robot first removes the fiberglass mandrel from the leftward end of a tube. Step 4 Step 5 Here, a computer-controlled diamond saw automatically moves into position and trims the tube to precise dimensions. The keys to the Shell Node Concept (SNC) are its injection molded short carbon fiberreinforced connector half shells. The carbon fiber compound is fed into a state-of-the-art injection molding machine, where the interior and exterior of the node half are precisely monitored and controlled. Here, half shells seated in mold halves show the internal ribbing, while two half-shells, in the background, show the connector���s exterior. Step 6 Step 7 Step 8 In preparation for frame assembly, a robot applies the precisely metered amount of two-component adhesive appropriate to each node shell half. The robot is computercontrolled and monitored via digital camera. The tubes and connectors are then mated within bonding fixtures, clamped, allowed to cure ambiently and then postcured at elevated temperature in an oven. The finished frame and its corresponding front fork is measured via coordinate measuring machine and then static load tested to ensure that dimensional and strength requirements have been met. Source (all step photos): BMC Step 1 34 | HIgH-peRfORMANCe COMpOSITeS

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