Manufacturing method for hollow components made of fiber composite materials in tubular design, tubular film and manufacturing method for a tubular film

摘要

A method having the following steps: feeding a plastic material in the area of an inner surface of the mold, conforming the material to the inner surface of the mold, feeding a tubular film into the mold so that the material is positioned between an outer surface of the tubular film and the mold, expanding the tubular film using pressure and/or a vacuum, applying a pressure above atmospheric pressure and/or heating the mold so that the material is partly or completely melted and is adapted to conform to an inner contour of the mold and an outer contour of the expanded tubular film. The tubular film is shaped before it is fed into the mold. The invention further relates to a tubular film (1) and a method for manufacturing the same.

主权项

1. A manufacturing method for manufacturing a hollow component for an aerospace element, the aerospace element having a variable cross section and corners and being manufactured by conforming a plastic material preform, the method using a tubular film and a mould having inner surfaces with corresponding variable cross sections and corners, the method having the following steps:
a) feeding a plastic material preform in the area of the inner surfaces of the mould, the plastic material preform having a first fiber layer and a second fiber layer; b) conforming the plastic material preform to mechanically conform to the inner surfaces of the mould; c) feeding a tubular film into the mould so that the plastic material preform is positioned between an outer surface of the tubular film and the mould, the tubular film being unwound from a roll, expanded by pressure and/or a vacuum, and then contoured by a guide tool before it is fed into the mould in step c) such that its contour in a sectional plane perpendicular to its longitudinal extension is furnished with an outer contour with a plurality of recesses alternating with a plurality of protuberances distributed about its circumference and extending in the direction of its longitudinal extension, the tubular film being fed from an endless roll; d) expanding the contoured tubular film using pressure and/or a vacuum when the inner surfaces of the mould are joined together, the expanding of the contoured tubular film being performed without the contoured tubular film having to move along the plastic material preform, the protuberances contacting the plastic material preform prior to the recesses; and e) applying a pressure above atmospheric pressure in the contoured tubular film and heating the mould so that the plastic material preform is adapted to fuse the fiber layers and conform the fiber layers to an inner contour of the mould and an outer contour of the expanded tubular film.