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Page | 46 Vacuum Bagging for Resin Infusion 15. Troubleshooting 15.1. CommoncausesofVacuumLeakageorLoss • Bag Film Wrinkle on the Sealant Tape - whether using edge bagging or envelope bagging technique, if the bagging film is wrinkled on the sealant tape there will be a leak path. If the wrinkle is small simply massage the wrinkle into the sealant tape to achieve a seal. If the wrinkle is too large, carefully separate the film from the sealant tape and add extra sealant tape. • Bagging Film Wrinkle under Vac Valve Seal – Remove the pressure plate from the vac valve connection and check for wrinkling of the bagging film, any wrinkles under the silicone gasket could be a potential leak patch. Smooth out the wrinkles found and re- clamp the vac valve pressure plate firmly shut. • Sharp objects on bagging table – When envelope bagging, make sure the table used is free from sharp objects which could puncture the vacuum bag. This can be avoided by covering the table with breather fabric to avoid bag puncturing. If you suspect the bag has been punctured, use a leak detector to find the puncture and reseal with vacuum sealant tape. • Breather or Peel Ply fibres on Sealing area – Take care when cutting and trimming breathers or Peel Plies not to leave any fibres over the sealing area. These stray fibres if trapped under the sealing tape can create a potential leak path. Stray fibres can be picked up off the seal area using a piece of pressure sensitive adhesive tape. This a difficult situation to fix without making a new vacuum bag. • Vacuum Bag pleats flapping in autoclave wind cause sealant tape failure – Inside autoclaves and recirculation ovens there is a strong wind which can create flapping of large vacuum bag pleats. This can weaken the sealant tape seal under the pleat and lift the bagging film off the tool face. Secure pleats in the vacuum bag down to the tool with PS Tape. This will avoid putting stress on the sealing area. • Bag Bust in corner – Bridged bagging materials can stretch past their limit and burst when placed in the autoclave. Ensure all the materials, peel ply, release film, breather and bag film are well tailored and seated in position to avoid bag bursts.PDF Image | Vacuum Bagging for Resin Infusion
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