Abstract: Provided is a manufacturing method for a rectangular can according to which it is possible to bring an angle formed by a step surface of a step provided in a rectangular can body and an inner wall surface of the rectangular can body closer to 90 degrees. In a step-forming step, using a die 310 that is provided on an outer wall surface side of a sidewall on which the step is to be formed, a mandrel 410 for sandwiching the sidewall between the mandrel 410 and the die 310 on the bottom side relative to a portion where the step is to be formed in the inner wall surface on which the step is to be formed, and a punch 420 for pressing the side opposite to the bottom side relative to the portion where the step is to be formed in the inner wall surface on which the step is to be formed and compressing the sidewall between the punch 420 and the die 310, the step is formed by performing multiple instances of a pressing operation performed by the punch 420.

Abstract: The present invention provides a container, a lid body and a method of seaming a container, in which the influence of a load at the time of seaming can be made as small as possible, in the container having a seaming flange portion and a seaming curl portion notched. In a container of a structure in which a seaming flange portion formed at an open end portion of a container body, and a seaming curl portion formed on a periphery of a bottom lid are seamed to be joined to each other, and in which a notch is formed in at least one of the seaming curl portion and the seaming flange portion, a short and small curl portion in which a width of protrusion of the seaming curl portion is partially short is formed in at least one of circumferentially opposite sides of the notched portion.

Abstract: A square can capable of securing high sealing performance even if a curvature radius of a seamed portion at a seamed corner portion is reduced, enabling a reduction in a countersink depth, reduced in size, having excellent sealing ability and storage efficiency and a method and an apparatus for double seaming the square can. A second seaming roll (55) is guided by a model cam for second seaming having a model cam surface for second seaming formed in such a shape that it is swelled from a model cam surface for first seaming outwards at a corner seamed portion (5). Accordingly, the seaming shape of the corner seamed portion (5) is formed in such a shape that the seaming width thereof at the center of the corner seamed portion is larger than the seaming width of a linear sealed portion (4) and is swelled outwards to absorb an increase in sheet thickness at the corner seamed portion.

Abstract: The present invention provides a container, a lid body and a method of seaming a container, in which the influence of a load at the time of seaming can be made as small as possible, in the container having a seaming flange portion and a seaming curl portion notched. In a container of a structure in which a seaming flange portion formed at an open end portion of a container body, and a seaming curl portion formed on a periphery of a bottom lid are seamed to be joined to each other, and in which a notch is formed in at least one of the seaming curl portion and the seaming flange portion, a short and small curl portion in which a width of protrusion of the seaming curl portion is partially short is formed in at least one of circumferentially opposite sides of the notched portion.

Abstract: In seaming various shapes of cans, there is no need of replacement of a profiling cam or experience in techniques, thus enabling to reduce the number of components to be replaced and simplify a replacement work remarkably. Below a rotary driving ring (10), a holding ring (4) is mounted in such a manner that it can move horizontally and rotate integrally. Inside the holding ring (4), a curl roller (2) and a tightening roller (3) are mounted opposite to each other. The holding ring (4) is so mounted on a guide ring (6) as to be turned via a pressurization roller (5). The guide ring (6) is drive-controlled in the X-axis direction and Y-axis direction by an X-axis table (7) and a Y-axis table (8) driven by servo motors (14, 16) according to the shape of a can.

Abstract: A method for forming a loop winding having a plurality of meandering parts and disposed in a stator of a motor which includes: disposing the loop winding between a first die unit having a plurality of first dies and a second die unit having a plurality of second dies; and press forming the loop winding between the first dies and the second dies by relatively moving the first die unit and the second die unit toward each other, wherein the press forming step is so performed as to provide the loop winding with a plurality of meandering parts and, simultaneously, to reduce the loop winding in the radial direction.

Abstract: A method for forming a loop winding having a plurality of meandering parts and disposed in a stator of a motor which includes: disposing the loop winding between a first die unit having a plurality of first dies and a second die unit having a plurality of second dies; and press forming the loop winding between the first dies and the second dies by relatively moving the first die unit and the second die unit toward each other, wherein the press forming step is so performed as to provide the loop winding with a plurality of meandering parts and, simultaneously, to reduce the loop winding in the radial direction.

Abstract: A forming machine for forming a loop winding having a plurality of meandering parts and disposed in a stator of a motor which includes: a first die unit having a plurality of first dies spaced from each other at regular intervals in a circumferential direction; and a second die unit having a plurality of second dies which are spaced from each other at the same intervals as the regular intervals in a circumferential direction and which are each disposed between adjacent ones of the first dies, wherein each of the second dies has a winding holding part for holding a loop winding; and the first die unit and the second die unit are each provided with a winding diameter reducing means for reducing the loop winding in the radial direction thereof according to a displacement of the first die unit in the axial direction relative to the loop winding held by the winding holding parts.

Abstract: In seaming various shapes of cans, there is no need of replacement of a profiling cam or experience in techniques, thus enabling to reduce the number of components to be replaced and simplify a replacement work remarkably. Below a rotary driving ring (10), a holding ring (4) is mounted in such a manner that it can move horizontally and rotate integrally. Inside the holding ring (4), a curl roller (2) and a tightening roller (3) are mounted opposite to each other. The holding ring (4) is so mounted on a guide ring (6) as to be turned via a pressurization roller (5). The guide ring (6) is drive-controlled in the X-axis direction and Y-axis direction by an X-axis table (7) and a Y-axis table (8) driven by servo motors (14, 16) according to the shape of a can.

Abstract: A rectangular drawn container and a method for forming the same are provided which can prevent warpage of a bottom portion of a container in a simple way. In a rectangular drawn container that is provided with a polygonal bottom panel portion and a body portion of a polygonal tubular shape rising from peripheral edges of the bottom panel portion, a convex bead is formed on the bottom panel portion at a location in the vicinity of at least one bottom side rounded portion among bottom side rounded portions of the body portion, at an inner side of the container so as to extend in parallel to the at least one bottom side rounded portion at a predetermined distance therefrom. The bottom panel portion takes a rectangular shape, and the bead is arranged along a pair of bottom side rounded portions at long sides of the bottom panel portion.

Abstract: The present invention provides a three-piece rectangular can which can overcome drawbacks (joint defect) of a can body joint portion of a three-piece can, and is of a new type which overcomes shortage of a can body strength which a two-piece can possesses, and exhibits excellent liquid leakage resistance, excellent can body strength and excellent heat radiation property or the like even when the can is used as a casing of a battery or electric equipment.

Abstract: ABSTRACT A square can capable of securing high sealing performance even if a curvature radius of a seamed portion at a seamed corner portion is reduced, enabling a reduction in a countersink depth, reduced in size, having excellent sealing ability and storage efficiency and a method and an apparatus for double seaming the square can. A second seaming roll (55) is guided by a model cam for second seaming having a model cam surface for second seaming formed in such a shape that it is swelled from a model cam surface for first seaming outwards at a corner seamed portion (5). Accordingly, the seaming shape of the corner seamed portion (5) is formed in such a shape that the seaming width thereof at the center of the corner seamed portion is larger than the seaming width of a linear sealed portion (4) and is swelled outwards to absorb an increase in sheet thickness at the corner seamed portion.

Abstract: A forming machine for forming a loop winding having a plurality of meandering parts and disposed in a stator of a motor which includes: a first die unit having a plurality of first dies spaced from each other at regular intervals in a circumferential direction; and a second die unit having a plurality of second dies which are spaced from each other at the same intervals as the regular intervals in a circumferential direction and which are each disposed between adjacent ones of the first dies, wherein each of the second dies has a winding holding part for holding a loop winding; and the first die unit and the second die unit are each provided with a winding diameter reducing means for reducing the loop winding in the radial direction thereof according to a displacement of the first die unit in the axial direction relative to the loop winding held by the winding holding parts.