Pultrusion is an automated process for manufacturing composite materials into continuous, constant cross-sectional profiles. This is the thermoset analogy to extrusion. Strands of reinforcing material are pulled through a bath of thermoset resin and then through a heated die of the desired cross sectional shape. As the composite is pulled through the heated die, the resin cross links and a solid shape is pulled from the die.

Process Characteristics
Part Cost - low Tooling Cost - moderate Production Rate - moderate Most suitable for simple shapes Composite parts replace metal Composite parts can be produced in color Composite will not corrode
Examples