Can bodymaker

Patent metadata

Field	Value
Publication number	US-10967411-B2
Application number	US-201916254774-A
Country	US
Kind code	B2
Filing date	Jan 23, 2019
Priority date	May 6, 2010
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

A can bodymaker, which includes a disc feed (1) for feeding a disc (5) directly to the bodymaker itself. A locator (9) positions the disc (5) centrally to a blankholder (12) and a draw pad (10) clamps the disc (5) against a draw die (11). The blankholder (12) then forms the disc into a cup (20) and clamps the cup against a redraw die (14) ready to be picked up by a punch and carried through dies for forming a can body.

First claim

The invention claimed is:

1. A can bodymaker with a ram which carries a punch for forming a can from a cup, the can bodymaker comprising:
a disc feed being adapted to feed a metal disc directly into a channel of the bodymaker, wherein the metal disc is unlubricated, the disc feed comprising:
a vacuum feed for separating metal discs, and
a flighted belt for pushing the discs along;

a blankholder;
a locator for positioning the disc centrally to the blankholder; and
a draw pad for clamping the disc against a draw die,
wherein the blankholder is adapted to move towards a redraw die and thus, together with the redraw die, form the disc into a cup and to clamp the cup against the redraw die thereby allowing the cup to be picked up by the punch on the ram and carried through the redraw die and at least one ironing die for forming a can body.

2. The can bodymaker according to claim 1 , in which the disc feed comprises a feed plate with a spring loaded element that holds the disc against the locator.

3. The can bodymaker according to claim 1 , in which the disc feed includes a positioning cam and a spring loaded cushion.

4. The can bodymaker according to claim 1 , further comprising:
two sets of rollers that grip and drive the disc to the locator.

5. The can bodymaker according to claim 4 , in which one or more of the sets of rollers is off-center.

6. A method of forming a can body comprising:
lifting an unlubricated flat disc off a feed plate by vacuum and pushing the disc along a flighted belt;
spraying lubricant on both sides of the disc;
pushing the disc into a can bodymaker;
positioning the disc centrally to a blankholder;
clamping the disc against a draw die;
moving a blankholder towards a redraw die and thus, together with the draw die, form the disc into a cup;
clamping the cup against the redraw die;
picking up the cup on a punch on a ram; and
ironing the cup by carrying the cup through at least one ironing die to form the cup into a can body.

7. The method according to claim 6 , wherein the pushing step comprises moving the disc from the feed plate through rollers into the bodymaker.

Assignees

• Crown Packaging Technology Inc

Inventors

• Egerton Daniel
• Woulds William

Classifications

• B21D22/28 Primary

  of cylindrical articles using consecutive dies · CPC title

• B21D22/00 Primary

  Shaping without cutting, by stamping, spinning, or deep-drawing (otherwise than using rigid devices or tools or yieldable or resilient pads B21D26/00) · CPC title

• B21D43/12

  by chains or belts {(B21D43/145 takes precedence)} · CPC title

• B21D51/2692

  Manipulating, e.g. feeding and positioning devices; Control systems · CPC title

• B21D37/18

  Lubricating {, e.g. lubricating tool and workpiece simultaneously (lubricating workpieces for deep-drawing B21D22/201)} · CPC title