Technical training
Blade Repair Standard / V4 2023-05-02
The participants shall:
Describe in their own words and share their understanding of the different terms used for describing fibreglass mats used in blade repair
ELEMENT 18.3 - FIBRE ORIENTATION AND MOULDING THEORY
Learning objectives:
162) The participants can explain the importance of fibre orientation in a laminate structure (Knowledge, intermediate level) 163) The participants can act independently in safely producing two, 2-3-layer flat laminate panels covered on one side with gelcoat in accordance with a work instruction and drawing, creating one with epoxy and one with polyester resin systems and in accordance with a work instruction (Ability, intermediate level)
The instructor shall:
Explain the exercise and show the participants where the required materials and tools are stored
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
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