Reverse break stamp hook assembly

Abstract

A reverse break stamp hook assembly and method for breaking a biscuit from a casting. The reverse break stamp hook assembly is mounted to an upper trim die of conventional stamping equipment, and includes a leg that hangs from a pivot attached to a mounting bracket and a counterweight arm that extends from the pivot. The hook includes an angled front portion and a catch portion. As the upper trim die moves toward a lower trim die during the downstroke, the angled front portion of the hook contacts an edge of the biscuit. The contact between the edge of the biscuit and the angled front portion of the hook causes the hook to pivot away from the biscuit until the catch portion passes below the biscuit. The counterweight causes the hook to pivot back toward the biscuit, positioning the catch portion under the biscuit. During the upstroke, the catch portion engages the bottom side of the biscuit and causes the biscuit to break from the part as the upper trim die is raised. The biscuit breaks clean and does not leave a high gate.

Dependencies are inferred from the claim text.