GWO Blade Repair Training Standard V2.0
2021-04-01_TS_BR_V2
Explain the requirement to allow the gelcoat to tack off, and demonstrate how to determine that the gelcoat is ready for the next layer of materials Demonstrate how to measure and cut two pieces of biax fibreglass reinforcement material and how to mark the zero direction of the roll on the cut pieces Demonstrate how to correctly calculate the required amount of matrix material required for the given amounts of reinforcement material Demonstrate how to correctly calculate, measure out and mix the separate components of the matrix material Demonstrate how to apply the first layer of fibreglass and matrix material focusing on the fibre straightness, wetting out the fibres and removing air from the matrix using a bolt roller. Repeat with the second layer of fibreglass Demonstrate how to apply peel ply to the laminate and place the thermocouple, and how to cover the laminate with vacuum film to protect the heating blanket from resin Demonstrate how to place the heating blanket without folds, and how to adjust the temperature of the heating blanket in accordance with the temperature reading from the thermocouple to the required curing temperature in accordance with an approved work instruction or the matrix technical data sheet
Demonstrate how to determine the required curing time
Explain that the curing time starts when the matrix material has reached the required curing temperature After the curing time, demonstrate how to safely remove the heating blanket and place it to cool down Demonstrate how to safely remove the vacuum film and peel ply, and measure the hardness of the cured laminate with a Barcol/Shore D tester
The participants shall:
Practice the ability to prepare a flat aluminium mould surface with release agent, allow sufficient time for the release agent to dry, and mark out the required area with flash tape Practice the ability to accurately measure out and mix the required quantities of each component of gelcoat. Apply the gelcoat evenly and at the correct layer thickness in accordance with a work instruction Practice the ability to accurately measure and cut the required pieces of glass fibre. Mark the zero direction of the roll on the cut pieces Practice the ability to safely and accurately measure out and correctly mix the required quantities of each component of the matrix material in accordance with an approved work instruction Practice the ability to consolidate and remove air using a bolt roller and to keep the fibres as straight as possible
Practice the ability to apply the peel ply, thermocouple and vacuum foil in the correct order
Practice the ability to safely handle and apply a heating blanket to the laminate
Global Wind Organisation www.globalwindsafety.org
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