Patent ID: 9328511
Filing Date: 2016-05-03
CPC Classification: B21F,E04C,Y10T

Claim Text:
1. A method for manufacturing a sandwich panel comprising a core having a truss structure between upper and lower face sheets, the method comprising: disposing the upper and lower face sheets in parallel to each other at a predetermined distance in a vertical direction; sewing the upper and lower face sheets by repeatedly performing, several times, a process in which a plurality of flexible wires vertically pass through the upper and lower face sheets to reciprocation-connect the upper and lower face sheets to each other; inclining the vertically sewed flexible wires in one direction by relatively moving in the horizontal direction the upper and lower face sheets in parallel to each other; increasing a distance in the vertical direction between the upper and lower face sheets sewed by the flexible wires while the upper and lower face sheets are maintained in a parallel to each other; and fixing the upper and lower face sheets and the wires to each other.