What R.T.M. means

R.T.M. (Resin Transfer Moulding) is a low-pressure moulding process during which a mixture of resin and catalyst is injected into a closed mould containing reinforcing fibers.
When the resin has polymerized, the mould can be opened so as to remove the finished workpiece.
A vast range of resins can be used: polyesters, vinylesters, epoxy resins, etc., associated with pigments and charges such as alumina trihydrate and calcium carbonate. The fibers can be made of glass, carbon, arimid or a combination of these materials. There are numerous different weights and types available on the market.

WATCH OUR FILM CLIP ABOUT standard R.T.M.

Two methods

There are two ways of using the R.T.M. method in production activities:

1) STANDARD R.T.M. Uses pressurized moulds when the resin is injected. This is the most widely used method for making standard components.
2) VACUUM R.T.M. (light) Uses moulds in a vacuum. The vacuum applied inside the mould controls resin injection. This production method is slightly more expensive but, thickness of the resin infusion being equal, achieves a higher percentage of reinforcement than the STANDARD R.T.M. process.

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