Verfahren zum Herstellen von rohrfömigen Hohlkörpern

摘要

A process is claimed for manufacturing tubular hollow products comprising two layers of thermoplastic plastic, the outer one of which is reinforced with fibres. The inner layer is produced by extrusion, injection moulding or blow moulding, fibres(7,8) are then placed and wound onto the tubular inner layer(3) according to future loading levels, then the tubular inner layer(3) is partially or completely melted and the molten polymer pressed into the fibres to form a reinforced outer layer. Process equipment includes either an extruder(2), injection moulding machine or blow moulding machine for moulding the inner layer(3), a fibre placing and winding station(4,5,6), a heater(11), an internal mandrel for expanding the inner layer machine against a die(10) to smoothing the outer layer and a reshaping unit for varying the cross section of the tube.