A method and apparatus for producing two-piece can bodies by drawing and ironing a laminated metal sheet, and more particularly to a processing method which prevents abrasion damage or scuffing of the laminate layer on the can body during its ironing, and a drawn and ironed two-piece can body produced thereby.

A hydrostatic/hydrodynamic fluid bearing assembly for a can bodymaker is provided. The hydrostatic/hydrodynamic fluid bearing assembly is separate from the ram body. The outboard guide bearing assembly includes a carriage assembly and a number of elongated journals. The carriage assembly includes a ram coupling, a crank coupling, and body defining a number of journal passages. The ram body is coupled to a ram coupling. The crank coupling is structured to be coupled to a crank arm. Each journal extends through a carriage assembly body journal passage. In this configuration, the ram body may form a can body in a traditional manner, but fluid bearing assembly fluid is not applied to the ram body. Instead, the fluid bearing assembly fluid is applied to the journals.

A hydrostatic/hydrodynamic fluid bearing assembly for a can bodymaker is provided. The hydrostatic/hydrodynamic fluid bearing assembly is separate from the ram body. The outboard guide bearing assembly includes a carriage assembly and a number of elongated journals. The carriage assembly includes a ram coupling, a crank coupling, and body defining a number of journal passages. The ram body is coupled to a ram coupling. The crank coupling is structured to be coupled to a crank arm. Each journal extends through a carriage assembly body journal passage. In this configuration, the ram body may form a can body in a traditional manner, but fluid bearing assembly fluid is not applied to the ram body. Instead, the fluid bearing assembly fluid is applied to the journals.

A punch and a die for stretching battery case body and its stretching process. The die includes a stepped punch as a male die, at least one thinning ring as a female die, and a variable-wall-thickness stretching step, which belongs to the thinning stretching. When the sheet or plate is stretched to the cup-shaped stretching piece by at least one-time forming stretching, and then through the thinning stretching to finally obtain the variable-wall-thickness battery case body with thin wall in the middle and thick wall at one end or both ends in the axial direction. The body can reduce the material consumption of the middle section of the case body and ensure the roll-sealing strength of one end or both ends, thus solving the problem between the amount of materials and the reliability of the roll sealing caused by the wall thickness of the battery case body.

A punch and a die for stretching battery case body and its stretching process. The die includes a stepped punch as a male die, at least one thinning ring as a female die, and a variable-wall-thickness stretching step, which belongs to the thinning stretching. When the sheet or plate is stretched to the cup-shaped stretching piece by at least one-time forming stretching, and then through the thinning stretching to finally obtain the variable-wall-thickness battery case body with thin wall in the middle and thick wall at one end or both ends in the axial direction. The body can reduce the material consumption of the middle section of the case body and ensure the roll-sealing strength of one end or both ends, thus solving the problem between the amount of materials and the reliability of the roll sealing caused by the wall thickness of the battery case body.

The disclosure relates to a method for producing a drawn/ironed can, including drawing and ironing a coated metal sheet, the coated metal sheet having an inner surface coating film at least on a surface to be a can inner surface. A glass transition temperature (Tg) of a polyester resin contained in the inner surface coating film is 55° C. or higher, an ironing rate in the drawing and ironing is 40% or greater, and a processing speed during ironing in the drawing and ironing is 2000 mm/sec or higher. Thus, even in a case where a coated metal sheet having a coating film with excellent flavor sorption resistance and contains a polyester resin having a high glass transition temperature as a main component is used, occurrence of a coating film defect during molding and occurrence of coating film peeling due to heat treatment can be suppressed.

The disclosure relates to a method for producing a drawn/ironed can, including drawing and ironing a coated metal sheet, the coated metal sheet having an inner surface coating film at least on a surface to be a can inner surface. A glass transition temperature (Tg) of a polyester resin contained in the inner surface coating film is 55° C. or higher, an ironing rate in the drawing and ironing is 40% or greater, and a processing speed during ironing in the drawing and ironing is 2000 mm/sec or higher. Thus, even in a case where a coated metal sheet having a coating film with excellent flavor sorption resistance and contains a polyester resin having a high glass transition temperature as a main component is used, occurrence of a coating film defect during molding and occurrence of coating film peeling due to heat treatment can be suppressed.

A wiping unit for a reciprocating ram includes a subunit including: a ring-shaped wipe member including a lip to press an outer peripheral surface of the ram; and an elastic ring disposed on an outer circumference of the wipe member and configured to press the lip on the outer peripheral surface of the ram. The wipe member is made of rigid resin.

A wiping unit for a reciprocating ram includes a subunit including: a ring-shaped wipe member including a lip to press an outer peripheral surface of the ram; and an elastic ring disposed on an outer circumference of the wipe member and configured to press the lip on the outer peripheral surface of the ram. The wipe member is made of rigid resin.

A metal cup and method of forming the same is provided. Metal cups of the present disclosure comprise a plurality of thin, straight-walled sections and a tapered profile. A domed portion is provided in the bottom of the cup. The cup may comprise a disposable cup, a reusable cup, or a recyclable cup.