COMPLEX DIE FOR TETRAHEDRON SANDWICH CORE HAVING HEXAGONAL PUNCH, MANUFACTURING METHOD FOR TETRAHEDRON SANDWICH CORE IN USING SAME AND PLATE STRUCTURE COMPRISING TETRAHEDRON SANDWICH CORE MANUFACTURED BY THE METHOD

摘要

PURPOSE: A complex mold for a tetrahedron sandwich core with a hexagonal shape of a punching part, method of manufacturing a tetrahedron sandwich core using the same, and tetrahedron sandwich plate structure comprising a tetrahedron sandwich core are provided to minimize spring back since the lower bent part of a bending part is sharply bent by a given angle. CONSTITUTION: A complex mold for a tetrahedron sandwich core consists of a lower mold(200), an upper mold(100), and a metal plate(300). The lower mold comprises a female wedge and a blanking part(220). A bending part(210) is formed on the female wedge. A plurality of hexagonal parts are formed on the blanking part. Male wedge matching with the female wedge is formed on the upper mold in plural. Female wedge and a press member are formed on the upper mold. The metal plate is slid to the lower mold. The metal plate is bent by the bending part by the pressure of the upper mold.