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US 3,945,231 AGranted
Process and apparatus for preparation of thin walled cylindrical vessels
AssigneeToyo Seikan Kaisha, Ltd.
InventorsKatsuhiro Imazu, Masao Miyata
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AssigneeToyo Seikan Kaisha, Ltd.
InventorsKatsuhiro Imazu, Masao Miyata
Estimating the term…
In preparing thin walled cylindrical containers, e.g., can bodies, by the drawing and ironing processing, the lubricating effect between the metal material and tool metal can be highly improved by irradiating ultrasonic waves at least to the part to be ironed of the side wall portion of a cup-like formed article simultaneously with application of a lubricant. With the improvement of the lubricating effect thus attained, the manufacturing rate of can bodies can be greatly increased without such troubles as breakages of the head portion, the ear edge portion and the bottom wall portion of the can body. This improvement of the lubricating effect can be further enhanced when ultrasonic waves are irradiated in the direction perpendicular to the tapered face of a tapered inlet portion of an ironing die.
A process for the preparation of thin-walled cylindrical containers which comprises the steps of
A process for the preparation of thin walled cylindrical containers which comprises the steps of
An apparatus for the production of thin walled cylindrical containers which comprises an ironing punch for supporting a cup-like formed article composed of a metal material, a plurality of circular ironing dies surrounding the axis of the ironing punch and engaged with the side wall portion of the cup-like formed article supported on the ironing punch, a driving mechanism for causing a relative reciprocal movement between said ironing punch and ironing dies, a lubricant feed mechanism disposed to feed a lubricant at least to the part of the side wall portion of the cup-like formed article to be ironed, and means for uniformly distributing the lubricant on the part of the side wall portion to be ironed and between the side wall part and said circular dies, said means including a plurality of ultrasonic wave-irradiating mechanism-supporting members disposed equidistantly and substantially independently from one another on the outer periphery of said circular dies, and a ultrasonic waveirradiating mechanism comprising an assembly of a ultrasonic vibrator element and a horn is disposed on each of said ultrasonic wave-irradiating mechanism-supporting mechanisms so that the axis of the ultrasonic wave-irradiating mechanism is substantially perpendicular to a tapered inlet portion of said ironing dies.
Dependencies are inferred from the claim text.