Method of producing aluminum container from coil feedstock
AssigneeExal Corporation
InventorThomas Chupak
Life of this patent
Estimating the term…
Abstract
Aerosol cans, more particularly, aluminum aerosol cans made from disks of aluminum coil feedstock, are provided. A method for necking aerosol cans of a series 3000 aluminum alloy is also provided. The method prevents the cans from sticking in the necking dies and produces a can with a uniquely shaped profile. The aluminum aerosol cans that are produced have the attributes of strength and quality, while being produced at a cost that is competitive with steel aerosol cans.
Claims24
A method of forming a one-piece aluminum can, comprising:
- cutting a plurality of disks from a coil of series 3000 aluminum alloy approximately 0.51 mm thick;
- drawing each of said disks at least once to form a cup;
- reverse drawing each of said disks at least once to form a can having a bottom portion approximately 0.51 mm thick and a vertical side wall portion;
- ironing said side wall portion of each can to a thickness of approximately 0.20 mm;
- and
- sequentially processing said ironed cans through a series of necking dies selected to form a shoulder and neck each having a desired profile 1 wherein said sequentially processing comprises die necking each can with a first necking die having an angle of 0°30′0″ at the back of said first necking die.
A method of forming a one-piece aluminum can, comprising:
- cutting a plurality of disks from a coil of series 3000 aluminum alloy approximately 0.51 mm thick;
- drawing each of said disks at least once to form a cup;
- reverse drawing each of said disks at least once to form a can having a bottom portion approximately 0.51 mm thick and a vertical side wall portion;
- ironing said side wall portion of each can to a thickness of approximately 0.20 mm;
- and
- sequentially processing said ironed cans through a series of necking dies selected to form a shoulder and neck each having a desired profile wherein said sequentially processing comprises die necking each can with a first necking die having an angle of 0°30′0″ at the back of said first necking die and die necking each can with subsequent necking dies, at least certain of which have an angle of 3° at the back of said subsequent necking dies.
A method of forming a shoulder and neck in an aluminum can, comprising:
- sequentially processing a can through a first series of up to 28 necking dies arranged in a first circular pattern, wherein said first series of necking dies includes a first necking die having an angle of 0°30′0″at the back of said first necking die;
- and
- sequentially processing said can through a second series of up to 28 necking dies arranged in a second circular pattern to form a desired shoulder and neck.
A method of forming the top of an aluminum can, comprising:
- sequentially processing a can through a series of necking dies selected to form a neck and shoulder each having a desired profile, said necking dies having an angle of between 0°30′0″ and 3° at the back of said necking dies.
Dependencies are inferred from the claim text.