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Resin Infusion


With resin infusion, all semi-finished fiber products are first introduced into the mould. They are fixed in place with spray adhesive. Now various consumables are also attached with spray adhesive. A vacuum bag is closed with sealing tape and vacuumed. After checking the tightness of the vacuum bag, the resin is pulled through the mould.

Much better material properties are achieved than with the hand lamination. If the procedure is correct, the surface also has no defects (such as for example air bubbles).



  • Vacuum pump


Consumable material:

  • Resin + hardener
  • Disposable gloves
  • Cup + spatula
  • Fabrics
  • Vacuum bagging film
  • Sealant Tape
  • Vacuum pipe
  • Spray adhesive



  • Applying the release agent on the mould
    • Mask the edge to allow the sealing tape to be attached
    • Apply release agent (link release agent in the shop) using a lint-free cloth
    • Leave to air for 5 minutes
    • Polish the streaks out of the mould in the last gear
    • Apply release agent at least 4 times on new tools
    • Already used tools need at least 2 coats of release agent
  • Apply outer layer
    • Apply the spray adhesive carefully and let it air briefly
    • Apply outer layer from center to the edges
  • put on the next layer using spray adhesive
  • Repeat the process as often as necessary
  • Introduce core layer
  • Repeat laminate construction before core layer
    • Symmetrical / mirrored on the core
    • Symmetry avoids internal stresses in the material and thus deformation
  • Apply peel ply and infusion mesh with spray adhesiv
  • Apply vacuum bagging film
    • Vacuum bagging film must have many folds
    • It must not tension at any point, otherwise gaps will occur here
    • Attach vacuum tube to one end of the mould and seal with sealing tape
    • Attach the resin line to the other end of the component and close it with a vacuum clamp
  • Check air tightness
  • Mix resin
    • Do not mix too much as the resin heats up during curing (caution: plastic cups can melt!)
  • Insert the resin line in the resin cup and carefully open the vacuum clamp
    • Slow flow speed to avoid air pockets
  • Close the vacuum clamp after the infusion
  • Let the vacuum pump run to the end
  • Components can be removed from the mould after 12 hours
  • Separate component from mould and cut the edges
    • For optimal strength properties of the resin, the component must be tempered afterwards (curing in the oven for several hours)
    • Annealing according to the data sheet and intended use
Faserverbundaufbau; Lagenaufbau; Harzinfuionsaufbau
Faserverbundaufbau; Lagenaufbau; Harzinfuionsaufbau