Method and apparatus for necking containers
AssigneeNational Can Corporation
InventorsEdward S. Traczyk, Michael M. Shulski
Life of this patent
Estimating the term…
Abstract
A modular system for producing triple-necked open ended containers includes three substantially identical necking modules each having the same frame and identical rotatable turrets which have a plurality of identical necking stations around the periphery. Each necking station includes an annular necking die and a platform and punch which are cam-operated to move towards and away from each other and are maintained in engagement with the cams by pressurized fluid. Each necking station also has a container pressurizing means in the form of an annular chamber which acts as a holding chamber prior to transmitting the pressurized fluid into the container.
Claims30
Apparatus for deforming containers including a fixed member having an opening therethrough with a movable member reciprocable in said opening and having a cam follower at one end of said movable member, a cam spaced from said fixed member, and pressurized fluid means in said opening for maintaining said cam follower in engagement with said cam.
Necking apparatus for necking open ends of metal containers comprising a support, a turret rotatable on said support and having a plurality of substantially identical necking stations spaced about and adjacent to the periphery thereof, each necking station including:
- (a) an annular necking die on said turret;
- (b) a knock-out punch reciprocable in said necking die;
- (c) means for reciprocating said punch in said necking die including a first cam follower;
- (d) a platform spaced from and aligned with said necking die;
- (e) means for moving said platform towards and away from said necking die including a second cam follower,
- said support having a first cam engaged by all of said first cam followers and a second cam engaged by all of said second cam followers and having at least one removable and replaceable segment to vary the extent of movement of said platform;
- and pressurized pneumatic fluid means for maintaining said first cam followers in engagement with said first cam.
A method of necking an open-ended thin walled container comprising the steps of moving the container with its open end toward a relatively stationary necking die and punch movable within said necking die whereby said container wall engages between said punch and die, and substantially simultaneously moving the punch in the same direction as the container with the punch moving a greater speed than said container so that said container end is deformed.
Necking apparatus for necking open ends of metal containers comprising a support, a turret rotatable on said support and having a plurality of substantially identical necking stations spaced about and adjacent to the periphery thereof, each necking station including:
- (a) an annular necking die on said turret;
- (b) a knock-out punch reciprocable in said necking die;
- (c) means for reciprocating said punch in said necking die including a first cam follower;
- (d) a platform spaced from and aligned with said necking die;
- (e) means for moving said platform towards and away from said necking die including a second cam follower, said support having a first cam engaged by all of said first cam followers and a second cam engaged by all of said second cam followers;
- and, said first and second cams being configured to (1) initially cause said platform to move said container into engagement with said necking die;
- and, (2) subsequently cause said punch to move with said container at a slightly greater rate than said container to stretch said metal around said open end.
Necking apparatus for necking open ends of metal containers comprising a support, a turret rotatable on said support and having a plurality of substantially identical necking stations spaced about and adjacent to the periphery thereof, each necking station including an annular necking die, a knock-out punch reciprocable in said necking die, a first cam follower for reciprocating said punch in said necking die, a platform spaced from and aligned with said necking die for supporting a container and having a second cam follower, and first and second cams on said turret respectively engaging all of said first and second cam followers, the improvement of said first and second cams being configured to (1) initially move said container toward said necking die for engagement therewith and to position said punch into said open end of said container;
- and, (2) subsequently move said container and punch in the same direction with the punch moving at a greater speed than said container to deform said container end to said necking die.
Dependencies are inferred from the claim text.