Patent ID: 6817220
Filing Date: 2004-11-16
Classification: B21F

Abstract:
A mold head device of spring forming machine comprising:a rotation mechanism having a cylindrical body defining a first central bore, the cylindrical body being drivingly coupled to a torque/rotation source; a linear motion mechanism having a shaft axially and movably received in the first central bore of the cylindrical body, the shaft being drivingly coupled to a linear motion driving device; a rotation head fixed to the cylindrical body, the rotation head defining a second central bore and forming a projection; a mold head received in the second central bore of the rotation head and attached to the shaft of the linear motion mechanism, the mold head having a cylindrical outer end comprising a plurality of sector-shaped chunk blocks defining at least one diametrically extending channel adapted to accommodate a length of a spring wire that makes a spring therein, each chunk block having circumferential corners that are made rounded and having different radii of curvature, and each of the chunk blocks extending radially outward to an inner face of the second central bore of the rotation head.