Traditionally used metal sheet bodywork parts have been increasingly replaced in the production of the means of transport, agricultural and work machines, their components and accessories, but also in the civil sector by parts of plastic materials reinforced with glass fibres.
The main advantages of these parts are low investment costs and speed of preparation of the production. The parts also have great shape and dimensional stability within a wide range of temperatures. When using a suitable technology, it is possible to guarantee the exactly defined strength of the wall for individual parts. Another advantage is achieving a considerably lower weight with comparable mechanical properties. A wide spectrum of materials that can be selected enables to meet varied requirements of the customers, such as resistance to chemical impacts, UV stability, non-flammability, and have good thermally-insulating properties.
Plastic parts reinforced with glass fibres:
In the production of plastic materials reinforced with glass fibres we use
the following technologies:
The RTM technology (Resin Transfer Moulding) is based on injecting resin into closed moulds with inserted glass reinforcement. The mould consists of the top part and the bottom part, between which resin is injected with the use of the filling equipment. Therefore, there is no emission of volatile substances to surrounding air. The result of use of this technology is that both surfaces of the product are smooth. Another advantage consists in low investment costs and speed of preparation of the production. The RTM technology is an optimum technology for bigger production series.
It concerns a method of Hand Lay-up. Individual layers of glass reinforcement, which are then saturated with resin, are gradually inserted into the moulds sprayed with gelcoat. The application of resin always takes place manually with the use of a brush or a roller, when it is necessary to press out undesired air bubbles, which are formed between individual layers during the lay-up, and then the part is let harden. In this case, there is no need of special manufacturing equipment and designing complex moulds. This type is suitable especially for complex shapes, small-series production or for the development of prototype parts.