Abstract:
The present invention relates to a method and apparatus for manufacture of stringer reinforced composite skins. The method includes the consecutive steps of: providing a forming tool comprising elongated support members spaced apart by means of elongated dummy members. The support and dummy members may be assembled side by side longitudinally such that the long sides of the support and dummy members are essentially parallelly aligned. In a first fibre placement step fibre reinforced resin is placed onto said forming tool, to form a fibre reinforced skin on said forming tool. The fibre reinforced skin is cut along the longitudinal extension of the dummy members so as to cut out fibre reinforced blank materials for stringer members. The dummy members are removed. The fibre reinforced blank materials are formed so that the fibre reinforced blank materials are shaped around said support members to form stringer members. The stringer members are assembled by longitudinally bringing together the stringer members so that the long sides of the stringer members are essentially parallelly aligned, to form a stringer unit. In a second fibre placement step fibre reinforced resin is placed onto said stringer unit, to form a fibre reinforced skin onto said stringer unit. The fibre reinforced skin and said stringer unit are co-cured to form a stringer reinforced composite skin. The support members are then removed from said stringer reinforced composite skin.
Abstract:
The present invention concerns a mould tool assembly (13) and method of forming a hollow structure of an aerial article (2) by means of the mould tool assembly (13) having a first and second rigid forming tool body (15, 17) configured to be releasable coupled to each other via a joint coupling (19). The first rigid forming tool body (15) exhibits an increasing cross sectional area seen in a direction from the joint coupling (19) toward a first free end (33) of the first rigid forming tool body (15). The method comprises the steps of providing the first and second rigid forming tool body (15, 17); coupling the first and second rigid forming tool body (15, 17) to each other via the joint coupling (19); applying a resin matrix material on the first and second rigid forming surface (29, 31) and forming the resin matrix material over the first and second rigid forming surface (29, 31); curing the resin matrix material; uncoupling the joint coupling (19); and separating the first rigid forming tool body (15) from the second rigid forming tool body (17).
Abstract:
The present invention regards a method of producing a forming tool and the forming tool for forming an article, the forming tool (1) comprises a composite face sheet (7) having a forming surface (29) and an inner surface (17) opposite the forming surface (29), and further comprises a support structure being attached to the inner surface (17) of the composite face sheet (7). The support structure comprises a support shell (9, 9', 9") of composite having a first surface (27) facing the inner surface (17) of the composite face sheet (7) and having a second surface (28) opposite the first surface (27), the support structure further comprises distance members (11, 31), and the support shell (9, 9', 9") is fixed at a distance from the composite face (7) sheet by means of the distance members (11, 31).
Abstract:
The present invention regards a method of producing a forming tool and the forming tool for forming an article, the forming tool (1) comprises a composite face sheet (7) having a forming surface (29) and an inner surface (17) opposite the forming surface (29), and further comprises a support structure being attached to the inner surface (17) of the composite face sheet (7). The support structure comprises a support shell (9, 9', 9") of composite having a first surface (27) facing the inner surface (17) of the composite face sheet (7) and having a second surface (28) opposite the first surface (27), the support structure further comprises distance members (11, 31), and the support shell (9, 9', 9") is fixed at a distance from the composite face (7) sheet by means of the distance members (11, 31).
Abstract:
The present invention relates to a method and apparatus for manufacture of stringer reinforced composite skins. The method includes the consecutive steps of: providing a forming tool comprising elongated support members spaced apart by means of elongated dummy members. The support and dummy members may be assembled side by side longitudinally such that the long sides of the support and dummy members are essentially parallelly aligned. In a first fibre placement step fibre reinforced resin is placed onto said forming tool, to form a fibre reinforced skin on said forming tool. The fibre reinforced skin is cut along the longitudinal extension of the dummy members so as to cut out fibre reinforced blank materials for stringer members. The dummy members are removed. The fibre reinforced blank materials are formed so that the fibre reinforced blank materials are shaped around said support members to form stringer members. The stringer members are assembled by longitudinally bringing together the stringer members so that the long sides of the stringer members are essentially parallelly aligned, to form a stringer unit. In a second fibre placement step fibre reinforced resin is placed onto said stringer unit, to form a fibre reinforced skin onto said stringer unit. The fibre reinforced skin and said stringer unit are co-cured to form a stringer reinforced composite skin. The support members are then removed from said stringer reinforced composite skin.