METHOD OF MANUFACTURING A SEAMLESS THIN-WALLED TUBULAR BODY FROM FIBER-REINFORCED PLASTIC MATERIAL, THIN-WALLED TUBULAR BODY THUS OBTAINED AND DEVICE FOR CARRYING OUT SAID METHOD

摘要

A method of manufacturing a thin-walled seamless tubular body (3) from fibre-reinforced plastic material, which method comprises the steps of a) applying fibre-reinforced plastic material to a dinensionally stable tubular inner mould (1); b) positioning the inner mould (1) with fibre-reinforced plastic material in a seamless, dimensionally stable tubular outer mould (2) by relative displacement with respect to one another in the longitudinal direction, leaving clear a space (4) which is substantially present between the surface of the fibre-reinforced pastic material and the inner surface of the outer mould (2); c) reducing the size of the space (4) by relative displacement of the outer mould (2) and the inner mould (1) with fibre-reinforced plastic material with respect to one another in such a manner that the fibre-reinforced plastic material is subjected to pressure and is brought into contact with the inner mould (1) and the outer mould (2); d) causing the plastic material to flow; e) hardening the plastic material in the pressurized state; f) relieving the pressure; and g) removing the seamless thin-walled tubular body (3) which has been manufactured by relative displacement in the longitudinal direction with respect to the inner mould (1) and outer mould (2). The invention also relates to a seamless thin-walled tubular body (3), obtained in accordance with the invention, and to a device for manufacturing this body.