Method for manufacturing a core composite provided with cover layers on both sides as well as a core composite

摘要

The invention relates to a method for manufacturing a core composite (1, 20, 26) having a folded honeycomb core (2, 21, 29) provided on both sides with cover layers (3, 4, 22, 23, 27, 28) wherein the folded honeycomb core (2, 21, 29) has a number of drainage-enabling channels (5). First a core filler material (16, 17) is introduced into the folded honeycomb core (2, 21, 29) at least in some areas in order to provide the filler material with sufficient stability for the subsequent sewing process. The cover layers (3, 4, 22, 23, 27, 28) which are not yet impregnated with a curable plastics material are then placed on the folded honeycomb core (2, 21, 29) and stitched to this along the base lines (6 to 8) and/or apex lines (9, 10) at least in some sections by means of a sewing thread (19). The infiltration of the overall structure with a curable plastics material is then carried out followed by hardening by applying pressure and/or temperature. The core filler material (16, 17) can to complete the process be removed again completely from the folded honeycomb core (2, 21, 29) by being dissolved and washed out or by melting and flowing out. Delamination of the cover layers (3, 4, 22, 23, 27, 28) from the folded honeycomb core (2, 21, 29) is prevented by the stitching so that core composites (1, 20, 26) manufactured by the method according to the invention can be used in the primary structure of aircraft.;The invention further relates to a core composite (1, 20, 26) manufactured according to the provisions of the method.

主权项

1. Method for manufacturing a core composite having a folded honeycomb core provided on both sides with cover layers wherein the folded honeycomb core has a number of drainage-enabling channels running parallel to the cover layers, comprising:
a) bending round the apex lines of the folded honeycomb core so that substantially horizontally aligned flanges are formed at the apex lines of the folded honeycomb core; b) introducing a core filler material at least in some areas into the at least one folded honeycomb core; c) arranging a lower and an upper cover dry cover layer on the folded honeycomb core; d) mechanically bonding the cover layers at least in some areas to the flanges of the folded honeycomb core; e) infusing the cover layers with a curable plastics material; f) hardening the entire core composite by applying pressure and/or temperature; and g) removing the core filler material.