Method for manufacturing a three dimensional frame structure for use as a core structure in a sandwich construction

Abstract

A method is provided for manufacturing a three dimensional frame structure that can be used as a core structure in a sandwich construction. Furthermore, a frame structure is provided for a sandwich construction, which frame structure has been manufactured in accordance with the method. In the method, a two dimensional lattice structure is made from bar-shaped linear semi finished products, in which structure the semi finished products intersect at defined points of intersection; the bar-shaped linear semi finished products are connected at the points of intersection and are softened by locally applying heat to the lattice structure in each case along three non-intersecting (imaginary) straight lines. In order to impart a three dimensional shape to the lattice structure a force (F) is introduced into the lattice structure along the middle one of the (imaginary) straight lines to which heat has been applied, wherein, as a result of deformation of the lattice structure, the introduced force F is deflected into pairs of tensile forces acting in the semi finished products, as a result of which the lattice structure is pulled into a third dimension, along the middle (imaginary) straight line to which heat has been applied.