pultrusion 1-8-08 - Pultrusion Douglas J. Gardner Professor...

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1 Pultrusion Douglas J. Gardner Professor Wood-Polymer Hybrid Composites History of Pultrusion • First patent (1951) • 1950’s simple, solid rod stock • Most machines were designed and built in- house • late 1950’s structural shapes Reference: Meyer, R. W. (1985). Handbook of Pultrusion Technology, Chapman and Hall, New York, NY. ISBN 0-412-00761-4
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2 Standard Profiles • Round Rods • Round Tubes • Strip/Bar • Box Sections • Channels • Angles • Other Profiles Description of Pultruder • Creel • Resin wet-out tank • Forming dies • Heated matched metal die • Puller or drive mechanism • Cut-off saw
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3 Pultrusion Process Pultrusion Process •T h e creels position the reinforcements for subsequent feeding into the guides . The reinforcement must be located properly within the composite and this is the function of the reinforcement guides. • The resin bath saturates (wets out) the reinforcement with a solution containing the resin, fillers, pigment, and catalyst plus any other additives required. The interior of the resin bath is carefully designed to
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4 Pultrusion Process • On exiting the resin bath, the composite is in a flat sheet form. The preformer is an array of tooling which squeezes away excess resin as the product is moving forward and gently shapes the materials
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pultrusion 1-8-08 - Pultrusion Douglas J. Gardner Professor...

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