Patent ID: 9387636
Filing Date: 2016-07-12
CPC Classification: B29C,B29K,B29L

Claim Text:
1. A method for repairing a honeycomb core sandwich panel having a configuration in which a honeycomb structured core with a plurality of cells is held between a first skin and a second skin, the method comprising: a forming step of forming through holes in the honeycomb core sandwich panel; a repair material disposing step of disposing a repair material on at least one of a first surface and a second surface of the honeycomb core sandwich panel, the first skin being located on the first surface, and the second skin being located on the second surface; a panel restraining step of sandwiching the honeycomb core sandwich panel and the repair material from both surface sides of the first surface and the second surface, wherein during the panel restraining step the honeycomb core sandwich panel is brought into a restrained state, thereby restraining the honeycomb core sandwich panel; and a heating step of heating the repair material while the honeycomb core sandwich panel is restrained, wherein in the heating step, the repair material is heated and cured, or the repair material is heated and melted and thereafter solidified, wherein the heating step is conducted after the honeycomb core sandwich panel is brought into the restrained state, and wherein in the panel restraining step, a metal restraint device is used so that the honeycomb core sandwich panel and the repair material are sandwiched from both surface sides of the first surface and the second surface, and thereby the honeycomb core sandwich panel is restrained, the metal restraint device comprises at least a first plate to be arranged on the first surface side, a second plate to be arranged on the second surface side, and fixtures for coupling the first plate and the second plate, the fixtures being inserted into the through holes in the honeycomb core sandwich panel, the first plate has a flat shape when the first surface has a flat shape, and when the first surface has a curved shape, the first plate is configured so as to have a corresponding curved shape, and the second plate has a flat shape when the second surface has a flat shape, and when the second surface has a curved shape, the second plate is configured so as to have a corresponding curved shape, and wherein the metal restraint device is removed after the heating step.