Patent ID: 9126253
Filing Date: 2015-09-08
Classification: B21D,B30B

Abstract:
1. A mold for press forming comprising: an upper mold and a lower mold, the upper mold configured to move relative to the lower mold in a sliding direction; a first rod member disposed on the lower mold and configured to make contact with a workpiece to form a target design on the workpiece, the first rod member forming a first ring, the first ring being formed in a plane that is substantially perpendicular to the sliding direction; a second rod member disposed on the lower mold and that supports the first rod member; a third rod member disposed on the upper mold and configured to make contact with the workpiece to form the target design on the workpiece, the third rod member forming a second ring, the second ring being fomred in a plane that is substantially perpendicular to the sliding direction and having a similar shape as the first ring but with a different size; and a fourth rod member disposed on the upper mold and that supports the third rod member, wherein: the first and second rod members constitute a framework structure, a cross-section of each of the first and third rod members has a rectangular shape with rounded corners, and the first and second rings are disposed in parallel and form the target design on the workpiece by sandwiching the workpiece between the rounded corner on a side surface of the first rod member and the rounded corner on a side surface of the third rod member.