Apparatus and Method for Simultaneously Forming a Contoured Shoulder and Neck Portion in a Closed End of a Metallic Container

摘要

An apparatus and method of simultaneously forming a contoured shoulder and neck portion on a closed end a metallic container is provided. More specifically, the present invention relates to an apparatus and methods to form a contoured shoulder and neck portion on a closed end of a metallic two-piece container.

主权项

1. A method for simultaneously forming a contoured shoulder and neck portion on a closed end of a metallic container body having a first shape, comprising:
providing a draw die having an arcuate face portion adapted to be positioned proximate to an exterior closed end portion of said metallic container body; providing a draw ring adapted to be positioned within an interior of said metallic container body and having an arcuate shaped face positioned in opposing relationship to said arcuate face of said draw die; providing a second draw die having an arcuate face portion adapted to be positioned proximate to an exterior of a portion of a shoulder portion of said metallic container body; providing a punch adapted to be positioned within the innermost portion of said metallic container body; performing at least one forming operation with the punch, the draw die, and the draw ring on the closed end of the metallic container body to progressively form an arcuate shaped shoulder portion and a neck portion with a reduced diameter on the closed end of said metallic container body; and performing a final forming operation to change a radius between the arcuate shaped shoulder portion and the neck portion of said metallic container body, wherein a pilot supports an interior surface of the neck portion without contacting an interior surface of the closed end of said metallic container body while a clamping ring and the second draw die work in an opposing relationship to pinch the radius between the arcuate shoulder portion and the neck portion.