Abstract

Can shells are produced with tooling installed on a single action mechanical press, and the tooling includes an upper retainer supporting a blank and draw die enclosing an outer pressure sleeve and an inner pressure sleeve surrounding a die center punch, all having air actuated pistons. The die center piston has an air reservoir connected by air passages which form air springs for the inner pressure sleeve, and the outer pressure sleeve receives the same controllable air as the reservoir or low pressure plant air supply. The inner pressure sleeve has a projecting nose portion which initiates the drawing of a cup and has contoured surfaces which mate with corresponding surfaces on a die core ring to form and clamp the chuckwall of the shell during downstroke of the press. A lower panel punch forms the center panel, panel wall and countersink of the shell during upstroke of the press.

IPC Classes  ?

• B21D 22/20 - Deep-drawing
• B21D 51/44 - Making closures, e.g. caps

Abstract

Can shells are produced with tooling installed on a mechanical press, and the tooling includes an upper retainer supporting a blank and draw die enclosing an outer pressure sleeve and an inner pressure sleeve surrounding a die center punch, all having pistons. An air chamber is connected by air spring passages to the inner pressure sleeve piston, and the outer pressure sleeve receives the same air as the air chamber or lower pressure air. The die center punch has an insert which initiates the drawing of a cup, and the inner pressure sleeve and die center punch have contoured surfaces which mate with opposing surfaces on a die core ring to form and clamp the chuckwall of the shell during downstroke of the press. A panel punch has peripheral surfaces which form the panel wall and countersink of the shell during upstroke of the press.

IPC Classes  ?

• B21D 22/21 - Deep-drawing without fixing the border of the blank
• B21D 22/24 - Deep-drawing involving two drawing operations having effects in opposite directions with respect to the blank
• B21D 51/44 - Making closures, e.g. caps

Abstract

Can shells are produced with tooling installed on a mechanical press, and the tooling includes an upper retainer supporting a blank and draw die enclosing an outer pressure sleeve and an inner pressure sleeve surrounding a die center punch, all having pistons. An air chamber is connected by air spring passages to the inner pressure sleeve piston, and the outer pressure sleeve receives the same air as the air chamber or lower pressure air. The die center punch has an insert which initiates the drawing of a cup, and the inner pressure sleeve and die center punch have contoured surfaces which mate with opposing surfaces on a die core ring to form and clamp the chuckwall of the shell during downstroke of the press. A panel punch has peripheral surfaces which form the panel wall and countersink of the shell during upstroke of the press.

IPC Classes  ?

• B21D 21/00 - Combined processes according to methods covered by groups

Abstract

Disclosed is a can lid capable of preventing bulge defects and leakage during transportation by improving resistance against pressure. In the can lid, the curvature radius (R3) of a first curved portion (18) is between 1.2 to 4.0 mm, the curvature radius (R4) of a second curved portion (19) is between 0.6 to 3.0 mm, the angle (θ) between a common tangent (A) of a shoulder (7) and the first curved portion (18), and a panel (2) is between 55 and 70˚, the maximum distance (L1) from the common tangent (A) to the second curved portion (19) is between 0.3 to 0.6 mm, the maximum distance (L2) from a common tangent (B) of the second curved portion (19) and an inner bottom surface of a countersink (5) to the first curved portion (18) is 0.4 to 0.7 mm, the curvature radii (R1 and R2) of the inner bottom surface of the countersink (5) are not greater than 0.75 mm, and when a panel depth (P) is defined by the vertical dimension from the top point of an area from the shoulder (7) to a curl (8) to the surface of the panel (2), the ratio (P/D1) of the panel depth (P) to the external diameter (D1) of the panel (2) is not smaller than 10.17%, and the whole height of the can lid is not greater than 7.2 mm.

IPC Classes  ?

• B65D 8/04 - Containers having a curved cross-section formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal, plastics, wood or substitutes therefor characterised by wall construction or by connection between walls
• B21D 51/44 - Making closures, e.g. caps
• B65D 8/08 - Reinforcing or strengthening parts or members

Abstract

Can shells are produced with tooling installed on a mechanical press, and the tooling includes an upper retainer supporting a blank and draw die enclosing an outer pressure sleeve and an inner pressure sleeve surrounding a die center punch, all having pistons. An air chamber is connected by air spring passages to the inner pressure sleeve piston, and the outer pressure sleeve receives the same air as the air chamber or lower pressure air. The die center punch has an insert which initiates the drawing of a cup, and the inner pressure sleeve and die center punch have contoured surfaces which mate with opposing surfaces on a die core ring to form and clamp the chuckwall of the shell during downstroke of the press. A panel punch has peripheral surfaces which form the panel wall and countersink of the shell during upstroke of the press.

IPC Classes  ?

• B21D 28/00 - Shaping by press-cuttingPerforating
• B21D 22/00 - Shaping without cutting, by stamping, spinning, or deep-drawing

Abstract

Can shells are produced with tooling installed on a single action mechanical press, and the tooling includes an upper retainer supporting a blank and draw die enclosing an outer pressure sleeve and an inner pressure sleeve surrounding a die center punch, all having air actuated pistons. The die center piston has an air reservoir connected by air passages which form air springs for the inner pressure sleeve, and the outer pressure sleeve receives the same controllable air as the reservoir or low pressure plant air supply. The inner pressure sleeve has a projecting nose portion which initiates the drawing of a cup and has contoured surfaces which mate with corresponding surfaces on a die core ring to form and clamp the chuckwall of the shell during downstroke of the press. A lower panel punch forms the center panel, panel wall and countersink of the shell during upstroke of the press.

IPC Classes  ?

• B21D 22/21 - Deep-drawing without fixing the border of the blank

Abstract

Can shells are produced with tooling installed on a single action mechanical press, and the tooling includes an upper retainer supporting a blank and draw die enclosing an outer pressure sleeve and an inner pressure sleeve surrounding a die center punch, all having air actuated pistons. The die center piston has an air reservoir connected by air passages which form air springs for the inner pressure sleeve, and the outer pressure sleeve receives the same controllable air as the reservoir or low pressure plant air supply. The inner pressure sleeve has a projecting nose portion which initiates the drawing of a cup and has contoured surfaces which mate with corresponding surfaces on a die core ring to form and clamp the chuckwall of the shell during downstroke of the press. A lower panel punch forms the center panel, panel wall and countersink of the shell during upstroke of the press.

IPC Classes  ?

• B21D 22/21 - Deep-drawing without fixing the border of the blank

Abstract

Can shells are produced with tooling installed on a single action mechanical press, and the tooling includes an upper retainer supporting a blank and draw die enclosing an outer pressure sleeve and an inner pressure sleeve surrounding a die center punch, all having air actuated pistons. The die center piston has an air reservoir connected by air passages which form air springs for the inner pressure sleeve, and the outer pressure sleeve receives the same controllable air as the reservoir or low pressure plant air supply. The inner pressure sleeve has a projecting nose portion which initiates the drawing of a cup and has contoured surfaces which mate with corresponding surfaces on a die core ring to form and clamp the chuckwall of the shell during downstroke of the press. A lower panel punch forms the center panel, panel wall and countersink of the shell during upstroke of the press.

IPC Classes  ?

• B21D 22/21 - Deep-drawing without fixing the border of the blank
• B21D 51/44 - Making closures, e.g. caps

Abstract

A drawn aluminum can shell has a peripheral crown which is double-seamed with
an end portion of an aluminum can body to provide a can end having a generally
flat center panel connected by an inclined curved or straight panel wall to an
inclined inner wall of an annular U-shaped countersink. The countersink has an
outer wall which connects with an inclined lower wall portion of a chuckwall
at a junction below the center panel, and the chuckwall has a curved or
inclined upper wall portion which connects with an inner wall of the crown.
The chuckwall also has an intermediate wall portion forming.a break, and the
inner bottom width of the countersink is less than the radial width of the
panel wall. The inclined upper wall portion of the chuckwall extends at an
angle greater than the angle of the inclined lower wall portion of the
chuckwall.

IPC Classes  ?

• B21D 51/44 - Making closures, e.g. caps