Exel Composites has the capability to produce pre-preg tubes ranging in diameter from five-200mm.This tubing can be produced in a variety of lengths up to a maximum single length of 4.6 metres. Tubes can be joined to form longer lengths utilising either external sleeving or internal spigots.
This particular form of composite fabrication begins with the pre-impregnation (pre-preg) of reinforcement materials with a resin or binder. The combining of these two materials occurs prior to the moulding process and therefore enables a very accurate reinforcement to resin ration to be achieved. Pre-preg materials are used extensively in the aerospace industry due to their ability to maximise strength-to-weight ratios.
Pre-pregs are pliable and therefore able to be cut into various shapes or patterns prior to processing into the moulded products.
The moulding process involves rolling these pre-preg patterns around a tapered or parallel steel mandrel. Other simple shapes are available (ie flat sheet). The mandrel forms the internal shape of the moulding. A flexible outer mould is achieved by wrapping the moulded product with a polypropylene or nylon tape prior to heat curing. Heat curing gives a permanent hard, cross linked composite product.
Please choose the category of your interest to move further to the table of diameters.
Benefits of Pre-Preg moulding
The benefits offered by pre-preg moulding are:
♦ Exceptional tensile strength properties
♦ Excellent ‘flexural strength’ properties
♦ Superior compression characteristics
♦ Superior corrosion/chemical resistance
♦ Consistent reinforcement-to-resin ratios
♦ High strength-to-weight ratios
♦ 1/4 the weight of steel or brass (approx.)
♦ 3/4 the weight of aluminium (approx.)
♦ Strong lightweight parallel or tapered tube
♦ 'Short run’ capability due to low tooling costs