Fibreglass Mouldings

This is a process of creating useful shapes out of fibreglass reinforced resin plastics, the process is done by moulding and begins with an object known as a buck or the plug (this is an exact copy of the object that you wish to make, the buck can be made from a number of different materials; certain foams are used quite frequently.

Once you have your completed plug / buck it must be sprayed with a special mould release agent, this spray allows the plug to be separated from the mould once the product is finished. The release agent is a special type of Polyvinyl Alcohol (PVA) and/or Wax. Wax is often the preferred choice as it is said that Polyvinyl Alcohol can have a negative effect on the finished surface of the mould.

Before the process to create the mould is started another product must first be applied; after the release agent has been sprayed on a special pigmented resin called Gelcoat must be applied, this can be applied with a spray gun, roller or a brush. The Gelcoat makes the mould more durable and gives it surface a harder finish.

Now we have all these stages in place, layers of fibreglass can be laid into the surface of the buck. A layer of fibreglass mat and resin are applied over the fibreglass layers and a roller is used to remove any air bubbles that may be present. If the air bubbles are not removed the strength of the finished mould would be significantly weaker.

It is then left to set and cure, after they may be separated and your Fibreglass Moulding is complete.


Post time: 04-26-2017