US Patent 9441660 Mounting insert and method

A method for Inserting and fixing a mounting insert into a lightweight sandwich panel. The panel comprises a core layer and two cover layers that are applied to opposing main surfaces of the panel. A recess extends into the depth of the core layer of the panel. The mounting insert is inserted into the recess and is adhesively bonded therein. The bottom of the recess extends to a depth of the core layer material that extends further than the longitudinal extension of the recessing section to be inserted. When adhesively bonding the mounting insert, an air gap remains between an end face of the recessing section and the bottom of the recess. No adhesive is placed into the air gap. The air gap ensures a decoupling so that any applied tensile forces are no longer transferred to the cover layer opposite and the undesired formation of dents is avoided.