초록 ▼

A system and apparatus for roll forming to neck-in D&I can ends and replace double necks and triple necks is disclosed. An externally disposed free roll having independently rotatable sections is moved inward and axially against the outside wall of the open end of a rotating trimmed can to form a co

A system and apparatus for roll forming to neck-in D&I can ends and replace double necks and triple necks is disclosed. An externally disposed free roll having independently rotatable sections is moved inward and axially against the outside wall of the open end of a rotating trimmed can to form a conical neck at the open end of the cap, the two sections of the roller having different speeds depending upon neck diameters respectively engaged thereby. A spring loaded interior support roller moves under the forming force of the free roll. This is a single operation where the can rotates and the free roll rotates such that a smooth conical necked end and flange are produced.

대표청구항 ▼

A method of spin rolling the open end of a cylindrical container body comprising the steps of positioning inside the container body in axial inwardly spaced relation from the open end thereof an axially fixed sleeve engageable with the inside surface of the container body, said sleeve having a slope

A method of spin rolling the open end of a cylindrical container body comprising the steps of positioning inside the container body in axial inwardly spaced relation from the open end thereof an axially fixed sleeve engageable with the inside surface of the container body, said sleeve having a sloped end surface which faces the open end of the container body; positioning inside the container body a holder which fits the inside diameter of the container body to support the same, said holder having an end facing the sloped end surface of said sleeve, and said holder being supported for axial displacement away from said sleeve, said holder end and said sloped end surface of said sleeve defining a gap therebetween; positioning opposite said gap on the outside surface of the container body a roller supported for axial displacement away from said sleeve, said roller having a trailing end portion and a peripheral portion; spinning the container body thus supported by said holder and advancing said roller radially inwardly relative to said gap so that said trailing end portion presented by the roller and said sloped end surface of said sleeve engage the container body between them while said trailing end portion of said roller moves inwardly along said sloped end surface of said sleeve to roll a neck into the container body; and continuing to spin the container body while the roller moves inwardly and the holder retracts axially until the roller has spun an outwardly bent flange on to the end portion of the container body engaged between said holder end and said roller.