Technical training
Blade Repair Standard / V4 2023-05-02
9) Connect the vacuum gauge to one of the vacuum hoses, and attach the other hose to the vacuum pump. Use a resin trap between the repair and the vacuum pump. 10) Apply the vacuum film on top of the repair and press it down onto the vacuum sealant tape. 11) Start the vacuum pump and check for air leaks around the repair. Consult the OEM-specific instruction for the vacuum level to be achieved. Curing 1) Consult the TDS for the matrix material, to ascertain the correct curing temperature and time. 2) Place a heating blanket over the repair and switch it on. Adjust the temperature of the heating blanket until the temperature gauge reaches the correct curing temperature. 3) Make a note of the time that the temperature gauge reaches the correct temperature – this is the time at which the curing duration starts. 4) Allow the repair to cure for the time specified in the TDS. WARNING The cured vacuum bagging consumables will have sharp edges 5) After the specified curing time has elapsed, carefully remove the vacuum bagging materials from the repair, leaving the peel ply in place. 6) Verify that the matrix material has reached the specified hardness in the TDS using a Barcol or ShoreD tester. Filling 1) Remove the peel ply from the repair, and sand the surface to the required finish as stated in the TDS for the filler being used. 2) Weigh out and mix the filler (if using a two-component filler) 3) Apply filler to the repair and shape using a plastic scraper so that it matches the surrounding blade profile shape. 4) Allow the filler to cure fully in accordance with the TDS. 5) After the filler has cured, sand the filler using 120 grit paper so that it matches the surrounding blade profile as closely as possible. Paint or gelcoat 1) Consult the OEM specific repair instruction to ascertain whether gelcoat or paint or both are required to finish the repair. 2) Clean the filler surface using an appropriate cleaning agent and allow any residual cleaning agent to fully evaporate before proceeding.
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