CN203972674U - Button seam body maker - Google Patents

Abstract

The utility model relates to can making machinery field, discloses a kind of button seam body maker, comprises the plate taking device of saying good-bye, rolling hemming device, steel plate delivery apparatus and mould, and wherein, the plate taking device of saying good-bye is sent single steel plate into rolling hemming device; Rolling hemming device is sent steel plate into steel plate delivery apparatus; On steel plate delivery apparatus, be provided with push plate device, the steel plate on steel plate delivery apparatus, under the promotion of push plate device, enters mould; Mould comprises inner mould core and outer formwork that can folding, outer formwork inside is hollow structure, after outer formwork closes up, is wrapped in inner mould core outside, the medial surface of outer formwork have with moulding after the shape that matches of tank body, the steel plate that enters mould inner mould core and outside the effect compacted under of formwork.The utility model has the advantage of, simple in structure, without punching course, technological process is simple, and the tank surface of moulding is smooth, and consolidation has good using value.

Description

Button sewing can making machine

Technical Field

The utility model relates to a system jar machinery, in particular to detain and sew system jar machine.

Background

The seaming can making machine is one kind of tin printing can making machine and is one key apparatus for making gift packing box and can. Such as wine packing boxes, biscuits, moon cakes, candies, chocolate packing boxes, tea, dried fruits and other packing materials. The gift-grade packaging market replaces paper packaging and plastic packaging and has the advantages of strong function, high grade, easy recovery, energy conservation and environmental protection. Is also an emerging packaging product in the domestic market.

The existing can making machine is generally made and molded by adopting a stamping method, the stamping and can making process steps are complex, the difficulty is high, the can making efficiency is low, the yield is low, and the requirement on a mold is high. There is thus a need for a new can making apparatus or process.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art process steps is complicated, the shortcoming of system jar inefficiency, a novel detain and sew up system jar machine is provided.

In order to achieve the above purpose, the utility model can adopt the following technical proposal:

the buckling and sewing can making machine comprises a sheet separating and taking device, a rolling and curling device, a steel plate delivery device and a die, wherein the sheet separating and taking device feeds a single steel plate into the rolling and curling device; the rolling and curling device feeds the steel plate into a steel plate delivery device; the steel plate delivery device is provided with a push plate device, and a steel plate on the steel plate delivery device enters the die under the pushing of the push plate device; the die comprises an inner die core and an outer die shell capable of being opened and closed, the inner part of the outer die shell is of a hollow structure, the outer side of the inner die core is wrapped by the outer die shell after the outer die shell is closed, the inner side surface of the outer die shell is of a shape matched with the formed tank body, and a steel plate entering the die is formed under the action of the inner die core and the outer die shell.

In the embodiment of the utility model, the rolling crimping device includes a plurality of rolls to, the roll is to comprising 2 rolls by setting up side by side, the both ends of roll pair are provided with the preflex device respectively, the preflex device includes that positive is protruding and cloudy concave, positive protruding for around the convex flange of roll along the radial direction of roll, cloudy concave recess for around the concave recess of roll along the radial direction of roll, positive protruding and cloudy concave mutually support, the steel sheet is behind the rolling crimping device, the preflex device is crooked towards steel sheet one side respectively with the side of steel sheet length direction both sides.

In the embodiment of the utility model, be provided with a plurality of push pedal devices along the length direction that the steel sheet delivered the device evenly at interval, the push pedal device sets up in the steel sheet by mirror symmetry and delivers the push pedal claw of the length direction of device and constitute.

In the embodiment of the utility model, push away trigger one end and deliver device swing joint through setting up pivot and the steel sheet that the steel sheet delivered on the device, the other end orientation of push away trigger send the steel sheet to deliver the direction of advance of device, and the direction of advance towards the steel sheet on the push away trigger is provided with bellied buckle.

In the embodiment of the utility model, still include the corner cut device, the corner cut device is located steel sheet four corners position respectively, and the corner cut device is used for amputating the four corners of steel sheet.

In an embodiment of the present invention, the device further includes a discount device, the discount device includes a first cam set and a second cam set, the first cam set includes first cams symmetrically disposed on both sides of the steel plate delivery device in the length direction, and the second cam set includes second cams symmetrically disposed on both sides of the steel plate delivery device in the length direction; the first cam abuts against the steel plate from one side face of the steel plate; when the first cam abuts against one side of the steel plate, the second cam abuts against the side face of the other side of the steel plate, and the side edge of one end of the steel plate in the length direction is bent towards the first cam to form a folded edge.

In the embodiment of the utility model, the side at steel sheet length direction both ends is respectively towards the different side buckling of steel sheet.

In the embodiment of the present invention, the included angle between the bent side edges at the two ends of the steel plate in the length direction and the steel plate is 60-80 °.

In the embodiment of the utility model, still including the refolding device, the refolding device sets up in the refolding cam of the length direction both sides that the device was delivered to the steel sheet including symmetry, and the refolding cam supports and leans on one side of steel sheet, and the edge of refolding cam supports and leans on in the steel sheet and is close to hem department, and the refolding cam presses down the steel sheet order that supports and lean on the department and is recessed towards the direction of buckling of hem.

A buckle sewing can making machine comprises a sheet separating and taking device, a rolling and curling device, a steel plate delivery device, a corner cutting device, a folding device and a die; wherein,

the sheet separating and taking device delivers the steel plates to a rolling and hemming device in a single mode;

the rolling and hemming device conveys the steel plate to the steel plate conveying device and simultaneously turns over the side edges of the two sides of the steel plate along the length direction to form hems facing to different sides of the steel plate respectively;

the steel plate delivery device pushes the steel plate along a track perpendicular to the length direction of the steel plate and enables the steel plate to sequentially pass through the corner cutting device, the edge folding device, the re-folding device and the die;

the corner cutting device is used for cutting off four top corners of the steel plate;

the edge folding device bends the side edges of the two ends of the steel plate with the top corners cut off towards different side surfaces of the steel plate respectively to form folded edges;

the double-folding device presses a groove at the position of the steel plate along the folded edge, and the groove bottom of the groove faces to the bending direction of the folded edge;

the die comprises an inner die core and an openable outer die shell, the outer die shell wraps the outer side of the inner die core after being folded, and a steel plate entering between the outer die shell and the inner die core is extruded and formed.

Specifically, a sheet separating and taking device is arranged below the sheet storage bin, a single steel sheet is fed into the rolling and curling device, and a plurality of groups of rolling and curling devices jointly complete the pre-bending of the long edge of each steel sheet, so that the side edges of the two sides of the long edge of each steel sheet are respectively curled in different directions. This pre-bending process is an essential preliminary step for sealing and rolling the can mouth and can bottom after the can body is formed. When the steel plate comes out from the rolling and curling device and falls on the falling plate bed surface of the machine, the push plate device on the double-rod plate conveying frame receives the steel plate and then conveys the steel plate out along the vertical direction of the coming plate. The double-rod plate feeding frame is connected with a crank swing rod mechanism consisting of a plate feeding rocker arm and a rocker arm eccentric wheel, and the plate feeding rocker arm swings in a reciprocating manner once every one revolution of a crankshaft. Meanwhile, the plate pushing device moves the steel plate forwards by one step and then returns to the original position, and the distance of each plate moving is the distance between the front group of claws and the rear group of claws on the plate conveying rocker arm.

When the steel plate is pushed to the position where the corner cutting device is arranged, the power from the crank shaft enables the four corners of the steel plate to be cut off symmetrically by the cutting knife on the corner cutting device. The purpose of the corner cut is to prevent the overlapping of steel plates from influencing the seaming quality when the seaming at two ends is carried out.

After the steel plate is subjected to corner cutting, the next pushing is moved to the position where the discount device is arranged, two groups of cams are symmetrically arranged at two ends of a cam shaft of the discount device, the first group of flat cam mechanisms complete up-and-down pressurizing action, the second group of groove cam mechanisms complete horizontal forward leaping action, and after the actions are combined, the side edges of two ends of the steel plate are folded into an angle of 70 degrees. The symmetrically arranged cam groups have opposite working profiles, so that the folded edges at the two ends of the steel plate face upwards and the other end faces downwards. When the steel plate enters the die to be bent and formed, the folded edges at the two sides are just buckled into a knot.

If the steel plate is to be formed into a cylindrical tank body after edge folding, the steel plate needs to be folded into a 'shape buckle' when being transferred to the position of the double folding device, and other parts of the steel plate, which do not comprise the edge folding, are recessed towards the bending direction of the edge folding to form a groove formed along the edge folding so as to keep the roundness of the formed tank body. If the steel plate is molded into a rectangular tank body, the buckling knot is arranged on the arc of one edge, the steel plate is only idle stopped at the position of the folding device without being folded again, and the steel plate is pushed into a die by a pushing plate device in a step-by-step transferring mode.

The mould consists of a narrow inner mould core and an openable outer mould shell, wherein most of the inner mould core is fixed on an inner mould core mounting seat, the openable outer mould shell is fixed on a fixed shaft in a hinged mounting mode, and is operated by an outer mould opening and closing arm and a cam driven rod to open and close according to the rotating position of a cam. When the outer mold shell is opened, a gap is reserved between the inner mold core and the mold core mounting seat and the opened outer mold shell under the action of self weight, so that the steel plate can be pushed in.

The forming process of the can body is as follows; the cam pushes the lever mechanism to enable the inner mold core mounting seat to move upwards to clamp the steel plate along with the rotation of the crankshaft, the cam drives the outer mold to embrace, and the steel plate is bent around the inner mold core. Under the action of the cohesion of the outer mold, the inner mold core is narrowed a little, the steel plate is buckled, the cam pushes the buckling seam pressure head to buckle the can seam, and meanwhile, the buckling seam pressure head also drives the mold core expanding mechanism arranged in the mold core to buckle and seal the can seam tightly.

Accordingly, the whole actions of the can body manufacturing process of the tin printing buckle seam can manufacturing machine are as follows; the method comprises the steps of sheet splitting and sheet taking, sheet feeding, rolling and curling, sheet falling and reversing, progressive transferring, symmetrical corner cutting, edge folding and buckling, compound folding and shape correcting, horizontal pushing in a die, die lifting and pressing, external die embracing, narrowing and buckling, buckling and compacting, and die expanding and forming.

The utility model discloses owing to adopted above technical scheme, have apparent technological effect:

the tank body with a specific shape is obtained through mould compression molding, the tank making device has the advantages of simple structure, few process steps, high efficiency, smooth and full appearance of the molded tank body and good application value.

Drawings

FIG. 1 is a schematic view of a buckle seam can machine.

Fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Fig. 3 is an enlarged schematic view of fig. 1 at B.

Fig. 4 is an enlarged schematic view of fig. 1 at C.

Fig. 5 is an enlarged schematic view of fig. 4 at D.

FIG. 6 is a schematic structural view of the steel plate after being folded into a buckle.

FIG. 7 is a schematic view of a can making process flow for a buckle seam can making machine.

Detailed Description

The present invention will be described in further detail with reference to examples.

Example 1

A buckle seaming can machine, as shown in fig. 1, comprising a split sheet taking device 100, a roll hemming device 200, a steel sheet delivery device 300 and a mold 400, wherein the split sheet taking device 100 is disposed at one side of the steel sheet delivery device 300, and feeds a single steel sheet into the roll hemming device 200; the roll hemming apparatus 200 feeds the steel plate 10 into the steel plate delivery apparatus 300, and the single steel plate 10 fed into the steel plate delivery apparatus 300 falls into the steel plate delivery apparatus 300 in a posture in which the longitudinal direction is perpendicular to the longitudinal direction of the steel plate delivery apparatus 300; the steel plate delivery device 300 is provided with a push plate device 500, and the steel plate 10 on the steel plate delivery device 300 enters the die 400 under the pushing of the push plate device 500; the steel plate delivery device 300 comprises a plate conveying frame 301 and a falling plate bed surface 302 positioned at two sides of the plate conveying frame 301, the plate conveying frame 301 is in a long strip structure, 2 plate conveying frames 301 which are arranged in parallel at intervals are usually arranged, the rolling hemming device 200 extends to the position of a die 400, the push plate device 500 is positioned on the plate conveying frame 301, a flange 3021 is arranged on the outer side, away from the plate conveying frame 301, of the falling plate bed surface 302, when a steel plate 10 falls into the steel plate delivery device 300 under the pushing of the rolling hemming device 200, one end of the steel plate 10 contacts the falling plate bed surface 302 first, and after the edge of the steel plate 10 reaches the outer edge of the falling plate bed surface 302, the steel plate 10 does not advance any more due to the obstruction of the flange 3021, so that the positions of the steel plate 10 falling into the falling plate. After the steel plate 10 falls on the falling bed surface 302, the push plate device 500 pushes the steel plate 10 forward along the direction perpendicular to the length direction of the steel plate 10, and pushes the steel plate 10 toward the mold 400.

The mold 400 comprises an inner mold core 401 and an openable outer mold shell 402, as shown in fig. 2, the outer mold shell 402 is divided into a left half and a right half, the left half and the right half are connected through a rotating shaft arranged on the outer mold shell 402, after being closed, the inner part of the outer mold shell 402 is of a hollow structure, the outer mold shell 402 is closed and wraps the outer side of the inner mold core 401, the inner side surface of the outer mold shell 402 has a shape matched with the formed tank body, the outer mold shell 402 is usually replaced according to the shape of the manufactured tank body, generally, the inner side surface of the outer mold shell 402 is circular or rectangular, the inner mold core 401 has an outer side surface with a shape and a size matched with the inner side surface of the outer mold shell 402, when a steel plate 10 enters a gap between the outer mold shell 402 and the inner mold core 401, after the outer mold.

The roll hemming device 200 includes a plurality of roll pairs 201, as shown in fig. 3, the roll pairs 201 are composed of 2 rolls 202 arranged in parallel, pre-bending devices 203 are respectively arranged at two ends of the roll pairs 201, each pre-bending device 203 includes a male protrusion 2031 and a female recess 2032, the male protrusion 2031 is a flange protruding around the roll 202 along the radial direction of the roll 202, the female recess 2032 is a groove recessed around the roll 202 along the radial direction of the roll 202, the male protrusion 2031 and the female recess 2032 are mutually matched and arranged in pairs, the protrusion of the male protrusion 2031 is right located at the recessed portion of the female recess 2032, after the steel plate 10 passes through the roll hemming device 200, the portion of the steel plate 10 entering the pre-bending device 203 is bent toward the steel plate 10, and the pre-bending device 203 bends the side edges of the steel plate 10 at both sides in the longitudinal direction toward the steel plate 10, respectively, in this embodiment, the side edges of the steel plate 10 at both sides in the longitudinal direction are toward different sides of the steel plate 10, respectively.

The pre-bending devices 203 are arranged at two ends of the roller pair 201 in a central symmetry manner, in other words, one end of one roller 202 is a male protrusion 2031, and the other end of the roller 202 is a female recess 2032.

A plurality of push plate devices 500 are provided at regular intervals along the length direction of the steel sheet delivery device 300, and the push plate devices 500 are composed of push plate claws 501 provided in the length direction of the steel sheet delivery device 300 in mirror symmetry. The plate conveying frame 301 is driven by a crank swing rod mechanism 600, the crank swing rod mechanism 600 comprises a plate conveying rocker arm 601 and a plate conveying rocker arm eccentric wheel 602, the plate conveying rocker arm eccentric wheel 602 is connected with the crankshaft 700 and rotates under the driving of the crankshaft 700, the rotation of the plate conveying rocker arm eccentric wheel 602 drives the plate conveying rocker arm 601 to swing back and forth along the advancing direction of the plate conveying frame 301, the plate conveying frame 301 is driven to swing back and forth, and the steel plate 10 moves forward through the plate pushing device 500.

One end of the push plate claw 501 is movably connected with the plate feeding frame 301 through a rotating shaft 502 arranged on the plate feeding frame 301, as shown in fig. 4-5, the other end of the push plate claw 501 faces the advancing direction of the plate feeding frame 301, a convex buckle 503 is arranged on the push plate claw 501 in the advancing direction of the steel plate 10, the push plate claw 501 can rotate up and down along the rotating shaft 502 under the control of a spring, when the plate feeding frame 301 moves forward, the push plate claw 501 rotates upwards, one end of the push plate claw 501, which is far away from the rotating shaft 502, abuts against the side edge of the steel plate 10, and the steel plate 10 is clamped and fixed by the buckle 503 and moves forward along with the plate feeding; when the carriage 301 moves backward, the pusher claw 501 disengages from the steel plate 10 and rotates downward by the spring. The pushing claw 501 is used for pushing the steel plate 10 to advance, so that the distance of one-time advancing can be conveniently controlled, and the pushing claw 501 can fix the steel plate 10, thereby reducing unnecessary movement of the steel plate 10 caused by mechanical vibration.

The button sewing can making machine further comprises a corner cutting device 600, wherein the corner cutting device 600 is used for cutting off four top corners of the steel plate 10, the corner cutting device 600 is respectively located at four corners of the steel plate 10, and the corner cutting device 600 is used for cutting off four corners of the steel plate 10. The corner cutting apparatus 600 includes cutters driven by the crankshaft 700 to symmetrically cut four corners of the steel sheet 10 when the steel sheet 10 reaches a predetermined position.

The buckle sewing can machine further comprises a discount device 700, wherein the discount device 700 bends the side edges of the two ends of the steel plate 10 with the top corners cut off towards different side surfaces of the steel plate 10 to form folded edges, specifically, the discount device 700 comprises a first cam group and a second cam group, the first cam group comprises first cams symmetrically arranged on two sides of the steel plate delivery device 300 in the length direction, the first cams are flat cams, the second cam group comprises second cams symmetrically arranged on two sides of the steel plate delivery device 300 in the length direction, and the second cams are groove cams; the first cam abuts against the steel plate 10 from one side face of the steel plate 10; when the first cam abuts against one side of the steel plate 10, the second cam abuts against the other side of the steel plate 10, and the side edge of one end of the steel plate 10 in the length direction is bent towards the first cam direction to form a folded edge 11, as shown in fig. 6.

The folded edges 11 at both ends of the steel plate 10 are respectively bent toward different sides of the steel plate 10, that is, the side edges at both ends in the length direction of the steel plate 10 are respectively bent toward different sides of the steel plate 10.

The included angle between the bent side edges at the two ends of the steel plate 10 in the length direction and the steel plate 10 is 60-80 degrees. Preferably 70.

The buckle sewing can making machine further comprises a re-folding device 800, the re-folding device 800 presses a groove at the steel plate 10 along the hem, the groove bottom of the groove faces the bending direction of the hem, in the embodiment, the re-folding device 800 comprises re-folding cams symmetrically arranged at both sides of the length direction of the steel plate delivery device 300, the re-folding cams abut against one side surface of the steel plate 10, the edge of the re-folding cams abuts against the position where the steel plate 10 is close to the hem 11, and the edge of the re-folding cams presses the steel plate 10 abutted against the position at the edge to enable the steel plate 10 abutted against the position to recess towards the bending direction of the hem 11 to form a groove distributed along the hem. When the hems 11 at the two ends of the steel plate 10 are fastened with each other, the concave part can make the surface of the can body formed into a cylindrical can body more flat, so that the fastening part of the hems 11 is not protruded.

Further, in order to fasten and seal the can body and make the can body more full, the inner mold core 401 is composed of a lower mold core 4011 and an upper mold core 4012 which can rotate relative to the lower mold core 4011, as shown in fig. 2, one side of the lower mold core 4011 is connected with one side of the upper mold core 4012 through an inner mold core rotating shaft 4013, the two form an inner mold core 401 which can be opened and closed, usually, the inner mold core rotating shaft 4013 is arranged at the top end of the inner mold core 401, and the inner mold core rotating shaft 4013 is parallel to the folded edge 11 of the steel plate 10. A pinch pressure head 404 is arranged below the mold 400, and the pinch pressure head 404 is positioned at the outer side of the side wall of the outer mold shell 402 and faces the opening of the outer mold shell 402; when the outer mold shell 402 is closed, the pinch point 404 is drawn toward the outer mold shell 402 and squeezes the closed opening of the outer mold shell 402. In addition, because lower mold core 4011 and inner mold core mount pad 403 are fixedly connected, seam crimping pressure head 404 can also lean against the other side of lower mold core 4011 and upper mold core 4012 relatively far away from inner mold core rotating shaft 4013, that is, seam crossing of lower mold core 4011 and upper mold core 4012 far away from inner mold core rotating shaft 4013, and inner mold core mount pad 403 and seam crimping pressure head 404 can both move up and down. When the steel plate 10 enters the position of the mold 400, the inner mold core mounting seat 403 rises to drive the inner film core 401 to rise, the outer mold shell 402 wraps the inner mold core 401, the upper mold core 4012 is extruded to rotate towards the inner side of the inner film core 401, the inner mold core 401 is narrowed a little, the folded edges 11 on two sides of the steel plate 10 are buckled with each other, the buckled folded edges are just positioned at the seam of the other sides, far away from the inner mold core rotating shaft 4013, of the upper mold core 4012 and the lower mold core 4011, meanwhile, the seam buckling pressure head 404 extrudes towards the seam of the upper mold core 4012 and the lower mold core 4011, the buckled folded edges 11 are compressed, the upper mold core 4012 is pushed to rotate towards the outer side of the inner film core 401, the inner mold core 401 is slightly expanded, and the outer shape of the steel plate.

The can making process of the button sewing can making machine comprises the following steps which are carried out in sequence, as shown in fig. 7: the method comprises the following steps of separating and taking a plate 001, advancing single plate 002, rolling and curling 003, reversing falling plates 004, carrying out progressive transfer 005, symmetrically cutting angles 006, flanging and buckling 007, performing compound folding and reshaping 008, horizontally pushing a mold 009, lifting a mold press plate 010, closing an outer mold 011, narrowing and buckling 012, buckling and compacting 013 and expanding mold molding 014. Wherein:

the sheet taking plate 001 includes drawing a single steel sheet 10 using the sheet taking plate device 100.

The single sheet feeding 002 includes forward feeding the single steel sheet 10 using the roll hemming device 200.

The roll hemming 003 includes forming hems toward different lateral directions of the steel sheet 10 at both side edges in the length direction of the steel sheet 10 using the pre-bending apparatus 203 on the roll hemming apparatus 200.

The fall plate reversing 004 includes the roll hemming apparatus 200 feeding the steel plate 10 after the roll hemming 003 into the fall plate bed surface 302.

The progressive shift 005 includes the steel plate 10 dropped on the falling plate bed surface 302 moving forward step by the push plate device 500.

The symmetrical cutting 006 includes the steel plate 10 which is moved forward step by step to cut four corners symmetrically by the cutting means 600.

The hemming buckle 007 includes a steel plate 10 with four cut corners, and under the action of the folding device 700, the steel plate 10 bends the side edges at the two ends in the length direction toward the different sides of the steel plate 10 to form hems 11, and the hems 11 at the two ends of the steel plate 10 can be buckled with each other after the steel plate 10 is rolled.

The double-folding orthopedic 008 comprises a groove which is pressed at the position of the steel plate 10 close to the folded edge 11, so that after the folded edges 11 at two ends of the steel plate 10 are buckled, the buckled position can not be protruded. If the formed can is not cylindrical, the multifold reshaping 008 may be omitted.

The horizontal push-in die 009 includes pushing the steel plate 10 into the die 400 by the push of the plate feeding frame 301.

The lifting die pressing plate 010 comprises a lifting inner die core mounting seat 403, and drives the inner die core 401 to press the steel plate 10 upwards.

The cohesive outer mold 011 comprises a closed outer mold shell 402, a push mold 400 is pushed, and a steel plate arranged between the outer mold shell 402 and an inner mold core 401 is cohered and formed.

The narrowing closing button 012 comprises that after the outer mould shell 402 is closed, the upper mould core 4012 rotates towards the lower mould core 4011 to narrow the inner mould core 401, and the folding edges 11 at two ends of the steel plate 10 are buckled with each other.

The buckling compaction 013 refers to the rising of the buckling seam pressure head and the compaction of the buckling part of the folded edge 11.

The mold expansion molding 014 includes rotating the upper mold core 4012 away from the lower mold core 4011 to expand the inner mold core 401 and press the outer mold shell 402 to mold the steel plate 10 disposed between the inner mold core 401 and the outer mold shell 402.

In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.

Claims (10)

1. A button sewing can making machine, characterized by comprising a split sheet taking device (100), a roll hemming device (200), a steel sheet delivery device (300) and a die (400), wherein the split sheet taking device (100) feeds a single steel sheet into the roll hemming device (200); a rolling hemming device (200) feeds a steel plate (10) into a steel plate delivery device (300); a push plate device (500) is arranged on the steel plate delivery device (300), and a steel plate (10) on the steel plate delivery device (300) enters the die (400) under the pushing of the push plate device (500); the die (400) comprises an inner die core (401) and an openable outer die shell (402), the inner part of the outer die shell (402) is of a hollow structure, the outer die shell (402) wraps the outer side of the inner die core (401) after being folded, the inner side surface of the outer die shell (402) is of a shape matched with a formed tank body, and a steel plate (10) entering the die (400) is formed under the extrusion of the inner die core (401) and the outer die shell (402).

2. The buckle seam can machine of claim 1 further comprising a buckle seam ram (404); the buckling seam pressure head (404) is positioned at the outer side of the side wall of the outer formwork (402) and faces to the opening of the outer formwork (402); when the outer formwork (402) is closed, the pinch seam pressure head (404) is close to the outer formwork (402) and extrudes the closed opening of the outer formwork (402).

3. The button sewing can machine according to claim 1, wherein the roll hemming device (200) comprises a plurality of roll pairs (201), the roll pairs (201) are composed of 2 rolls (202) arranged side by side, the two ends of the roll pairs (201) are respectively provided with the pre-bending device (203), the pre-bending device (203) comprises a male protrusion (2031) and a female recess (2032), the male protrusion (2031) is a flange protruding around the rolls (202) along a radial direction of the rolls (202), the female recess (2032) is a groove recessed around the rolls (202) along the radial direction of the rolls (202), the male protrusion (2031) and the female recess (2032) are mutually matched, and after the steel plate (10) passes through the roll hemming device (200), the pre-bending device (203) bends the side edges of the two sides of the steel plate (10) in a length direction respectively towards one side of the steel plate (10).

4. Button sewing can machine according to claim 1, characterized in that a plurality of pusher means (500) are provided at regular intervals along the length of the steel plate delivery means (300), the pusher means (500) consisting of pusher claws (501) arranged in mirror image 5 to the length of the steel plate delivery means (300).

5. The buckle sewing can machine of claim 1, further comprising corner cutting means (600), the corner cutting means (600) being located at four corners of the steel plate (10), respectively, the corner cutting means (600) being adapted to cut off the four corners of the steel plate (10).

6. The button sewing can machine according to claim 1, further comprising a discount device (700), the discount device (700) comprising a first cam group and a second cam group, the first cam group comprising first cams symmetrically disposed at both longitudinal sides of the steel plate delivery device (300), the second cam group comprising second cams symmetrically disposed at both longitudinal sides of the steel plate delivery device (300); the first cam abuts against the steel plate (10) from one side face of the steel plate (10); when the first cam abuts against one side of the steel plate (10), the second cam abuts against the other side face of the steel plate (10), and the side edge of one end of the steel plate (10) in the length direction is bent towards the first cam direction to form a folded edge (11).

7. Button sewing can machine according to claim 6, characterized in that the sides of the two ends of the steel plate (10) in the length direction are respectively bent towards different sides of the steel plate (10).

8. Button sewing can machine according to claim 7, characterized in that the side edges at both ends of the steel plate (10) in the length direction are bent at an angle of 60-80 ° to the steel plate (10).

9. The buckle sewing can machine of claim 1, characterized by further comprising a folding device (800), wherein the folding device (800) comprises folding cams symmetrically arranged at two sides of the steel plate delivery device (300) in the length direction, the folding cams abut against one side of the steel plate (10), the edge of the folding cams abuts against the steel plate (10) near the hem (11), and the folding cams press the steel plate (10) at the abutting position to make the steel plate (10) at the abutting position concave towards the bending direction of the hem (11).

10. A button sewing can making machine is characterized by comprising a sheet separating and taking device (100), a roller hemming device (200), a steel sheet delivery device (300), a corner cutting device (600), a discount device (700), a repeated folding device (800) and a die (400); wherein,

the sheet separating and taking device (100) delivers the steel sheets (10) to a roll hemming device (200) in a single piece;

the roll hemming device (200) conveys the steel plate (10) to the steel plate conveying device (300) and simultaneously turns over the side edges of the two sides of the steel plate (10) along the length direction to form hems facing to different sides of the steel plate (10) respectively;

the steel plate delivery device (300) pushes the steel plate (10) along a track perpendicular to the length direction of the steel plate (10) and enables the steel plate (10) to sequentially pass through the corner cutting device (600), the discount device (700), the folding device (800) and the die (400);

the corner cutting device (600) is used for cutting off four top corners of the steel plate (10);

the discount device (700) bends the side edges of the two ends of the steel plate (10) with the top corners cut off towards different side faces of the steel plate (10) respectively to form folded edges;

the double-folding device (800) presses a groove at the position of the steel plate (10) along the folded edge, and the bottom of the groove faces the folding direction of the folded edge;

the die (400) comprises an inner die core (401) and an openable outer die shell (402), the outer die shell (402) is wrapped on the outer side of the inner die core (401) after being folded, and a steel plate (10) entering between the outer die shell (402) and the inner die core (401) is extruded and formed.