Technical training
Blade Repair Standard / V5 02052025
Using a flat aluminium mould, demonstrate how to prepare the mould surface with release agent and explain the purpose of the release agent and the drying time required before adding materials
Demonstrate:
a. how to mark out the 400mm by 300mm rectangle on the surface using flash tape
b. how to calculate the required amount of gelcoat for the marked-out mould area at a layer thickness of 0.8mm
c. how to correctly calculate, measure out and mix the separate components of the gelcoat and mention that there might be incompatible combinations of gelcoat and matrix systems.
d. how to apply the gelcoat to the mould surface and how to distribute the gelcoat evenly on the mould
e. how to use a wet film gauge to determine the layer thickness
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:
a. 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
b. how to correctly calculate the required amount of matrix material required for the given amounts of reinforcement material
c. how to correctly calculate, measure out and mix the separate components of the matrix material
d. 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
e. 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
f. 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
g.
how to determine the required curing time
Explain that the curing time starts when the matrix material has reached the required curing temperature
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