How to Cure the Ramp Rate's Effect on Composite Parts
Composite parts generate a significant amount of heat during the curing process. The ramp rate effect occurs when this heat raises to a level that damages the structural integrity of a part. Larger parts are susceptible to this effect because they require more epoxy resin. Controlling this effect is done by placing the part into a large oven and allowing the part to cure in a controlled environment. This prevents microcracking and allows the part to reach its peak strength.
- Large oven
- Wood blocks
- Metal sheet pan
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Instructions
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1
Set the temperature in a large oven to 40 degrees Fahrenheit above the ambient temperature. This is typically between 110 and 130 degrees.
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2
Allow the oven 20 to 30 minutes to reach the set temperature.
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3
Place the composite resin part, still in its jig, on a metal sheet pan. Prop the part off the pan with several wood blocks to allow airflow evenly around the part. There should be no stress points on the part that could affect its shape.
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4
Place the part and tray in the center of the oven and close the door. Wait for the part to completely cure.
