A curling device for the mouth of a can used in a metal can manufacturing equipment

Abstract

A can mouth curling device used on a metal packaging can manufacturing equipment. The present invention is to solve the problem that the rigidity and strength of the top mouth edge of the metal packaging can produced in the prior art are not high, the mouth edge is easily deformed and can cause the deformation of the can body, reducing the filling performance of the metal packaging can. Technical points: It includes a mounting shaft vertically arranged on the frame, a turntable rotatably fitted on the mounting shaft, a driving wheel rotatably fitted on the mounting shaft and drivingly connected to the turntable, a metal packaging can guiding disc fixed at the lower end of the mounting shaft, and a plurality of rolling wheels mounted on the turntable. The feature is that some rolling wheels are fixedly installed on the turntable through an upper roller frame and are evenly distributed to form an upper layer of rollers, and some other rolling wheels are rotatably installed on the turntable through a lower roller frame and are evenly distributed to form a lower layer of rollers. The height of the lower layer of rollers is lower than that of the upper layer of rollers. The device also includes a lower layer of roller driving mechanism, and the lower layer of roller driving mechanism drives the lower layer of rollers to realize vertical rotation through a vertical movement inclined mouth push rod.

Description

Technical Field

[0001] The present invention relates to a working mechanism of a metal packaging can manufacturing device, in particular to a can mouth curling device used on a metal packaging can manufacturing device. Background Art

[0002] Currently, for the can mouth rolling and flanging device used on the existing metal packaging can manufacturing device, as shown in a full-automatic high-speed manufacturing method and device for a metal can body disclosed in Chinese Patent No. 201410585660.0, which is the prior application of this application, the rolling and flanging mechanism at the sixth station further rolls the top mouth edge of the metal can body, causing the top mouth edge in an outwardly overturned state to curl outward. Since several rolling wheels of the rolling and flanging mechanism are fixedly and evenly distributed on the turntable at the same working level, the working result of the rolling and flanging operation is that the outward curling state of the top mouth edge of the metal packaging can is in a semi-circular curling state as shown by the reference numeral 24 in the right figure of Figure 7 of its accompanying drawings. This state of the mouth edge has low rigidity and strength, and is prone to deformation when the metal packaging can is lifted by the handle after being loaded, and is also prone to deformation when being impacted. After the mouth edge of the metal packaging can is deformed, it will cause the deformation of the can body, thereby deteriorating the filling performance of the metal packaging can. Summary of the Invention

[0003] In order to overcome the problem that the top mouth edge of the metal packaging can manufactured by the prior art is in a semi-circular curling state, with low rigidity and strength, the mouth edge is prone to deformation and will cause the deformation of the can body, reducing the filling performance of the metal packaging can, the object of the present invention is to provide an improved can mouth curling device used on a metal packaging can manufacturing device, which can overcome the defects of the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: A can mouth curling device for a metal packaging can manufacturing device, including a mounting shaft vertically arranged on a frame, a turntable rotatably fitted on the mounting shaft, a driving wheel rotatably fitted on the mounting shaft and drivingly connected to the turntable, a metal packaging can guiding disc fixed at the lower end of the mounting shaft, and a plurality of rolling wheels mounted on the turntable. It is characterized in that: Some of the plurality of rolling wheels are fixedly installed and evenly distributed on the turntable through an upper roller frame to form an upper layer of rollers; some of the plurality of rolling wheels are rotatably installed and evenly distributed on the turntable through a lower roller frame to form a lower layer of rollers. The height position of the lower layer of rollers is lower than that of the upper layer of rollers. The can mouth curling device further includes a lower layer roller driving mechanism, and the lower layer roller driving mechanism drives the lower layer of rollers to perform a feeding operation of vertical rotation through a vertical movement inclined mouth push rod thereon. Rolling forming ring grooves are provided on the outer sides of the front parts of the upper layer of rollers and the lower layer of rollers. When the turntable drives the upper layer of rollers and the lower layer of rollers to perform horizontal rotation, the lower end point of the movement track of the bottom side of the rolling forming ring groove of the upper layer of rollers is connected to the upper end point of the movement track of the top side of the rolling forming ring groove of the lower layer of rollers. And when the vertical movement inclined mouth push rod drives the lower layer of rollers to perform vertical rotation, the movement track of the top side of the rolling forming ring groove of the lower layer of rollers rotates around its upper end point as the rotation axis, so as to realize curling the lower side of the top mouth edge of the metal packaging can inward and finally forming a shape with a circular cross-section.

[0005] In the above technical solution, the upper layer of rollers and the lower layer of rollers on the turntable can be arranged in a mutually offset manner to avoid mutual interference.

[0006] In the above technical solution, the rolling forming ring grooves can all adopt a semi-circular cross-section structure.

[0007] In the above technical solution, the lower roller frame can be composed of a fixed frame fixed on the turntable, a lever frame rotatably fitted on the fixed frame, a first pulley rotatably fitted on the fixed frame, a second pulley rotatably fitted on the upper end of the lever frame, and a return spring with one end connected to the fixed frame and the other end connected to the upper end of the lever frame. The lower layer of rollers is rotatably fitted at the lower end of the lever frame, and the inclined mouth lower part of the vertical movement inclined mouth push rod is slidably fitted between the first pulley and the second pulley.

[0008] The lower roller driving mechanism in the above technical solution may be composed of a push rod frame that is rotationally and slidably fitted on the mounting shaft and is drivingly connected to the driving wheel, several vertical movement inclined push rods respectively fixed on the push rod frame, a pressing disc slidably fitted on the mounting shaft, a thrust bearing installed between the push rod frame and the pressing disc, a cam driving mechanism for connecting driving power, an upper push rod slidably fitted on the frame with one end connected to the pressing disc and the other end connected to the cam driving mechanism, and a return compression spring sleeved on the upper push rod.

[0009] The feeding of the top edge of the metal packaging can in the above technical solution can be realized by lifting the metal packaging can by a lifting mechanism below the guiding disc of the metal packaging can.

[0010] The beneficial effects of the present invention are as follows: Since some of the several rolling wheels are fixedly installed and evenly distributed on the turntable through the upper roller frame to form the upper layer of rollers, and some of the several rolling wheels are rotatably installed and evenly distributed on the turntable through the lower roller frame to form the lower layer of rollers, the height position of the lower layer of rollers is lower than that of the upper layer of rollers. The can mouth curling device further includes a lower roller driving mechanism, and the lower roller driving mechanism drives the lower layer of rollers through the vertical movement inclined push rods thereon to realize the feeding operation of vertical rotation. Therefore, through the curling of the top edge of the metal can body by the upper layer of rollers, the top edge in a state of being turned outwards is curled outwards into a semi-circular cross-section state. Then, through the further rolling and gradually rotating feeding in the vertical plane of the lower layer of rollers, the lower side of the top edge of the metal can body with a semi-circular cross-section is curled inwards, so that the top edge of the metal can body is finally formed into a circular cross-section state, which can effectively improve the rigidity and strength of the top edge of the metal can body, making it not easy to deform when the metal packaging can is lifted by the handle after being loaded, and not easy to deform when being impacted, thus effectively improving the loading performance of the metal packaging can.

[0011] The following further describes the present invention in conjunction with the drawings and embodiments. Description of the Drawings

[0012] Figure 1 is a three-dimensional schematic diagram of an embodiment of the present invention.

[0013] Figure 2 is Figure 1 a three-dimensional schematic diagram from another angle of

[0014] Figure 3 is Figure 1 an enlarged schematic diagram of the plane rotation trajectory cross-section of the bottom side of the rolling forming ring groove of the upper layer of rollers and the plane rotation trajectory cross-section of the top side of the rolling forming ring groove of the lower layer of rollers of

[0015] Figure 4 is Figure 1Cross-sectional schematic diagram of the lower roller stand.

[0016] In the figure: 1. Mounting shaft; 2. Turntable; 3. Driving wheel; 4. Metal packaging can guiding disc; 5. Rolling wheel; 6. Upper layer rollers (some rolling wheels); 7. Upper roller stand; 8. Lower layer rollers (some other rolling wheels); 9. Lower roller stand; 10. Lower layer roller driving mechanism; 11. Vertically moving inclined mouth push rod; 12. Rolling forming ring groove of the upper layer rollers; 13. Rolling forming ring groove of the lower layer rollers; 14. Movement track cross-section at the bottom side of the rolling forming ring groove of the upper layer rollers; 15. Movement track cross-section at the top side of the rolling forming ring groove of the lower layer rollers; 16. Fixed frame; 17. Lever frame; 18. First pulley; 19. Second pulley; 20. Return tension spring; 21. Lower end of the lever frame; 22. Lower inclined part of the inclined mouth of the vertically moving inclined mouth push rod; 23. Push rod frame; 24. Pressing disc; 25. Cam driving mechanism; 26. Machine frame; 27. Upper push rod; 28. Return compression spring; 29. Shaft. Specific implementation mode

[0017] Refer to Figures 1 to 3 For the can mouth curling device used on this metal packaging can manufacturing equipment, it includes a mounting shaft 1 vertically arranged on the machine frame, a turntable 2 rotatably fitted on the mounting shaft 1, a driving wheel 3 rotatably fitted on the mounting shaft 1 and drivingly connected to the turntable 2, a metal packaging can guiding disc 4 fixed at the lower end of the mounting shaft 1, and a number of rolling wheels 5 mounted on the turntable 2, etc. Its characteristics are: Some of the rolling wheels 5 among the number of rolling wheels 5 and the like are fixedly installed and evenly distributed on the turntable 2 through the upper roller stand 7 to form the upper layer rollers 6, and some other rolling wheels 8 among the number of rolling wheels 5 are rotatably installed and evenly distributed on the turntable 2 through the lower roller stand 9 to form the lower layer rollers 8. The height position where the lower layer rollers 8 are located is lower than that of the upper layer rollers 6. The can mouth curling device also includes a lower layer roller driving mechanism 10. The lower layer roller driving mechanism 10 drives the lower layer rollers 8 through the vertically moving inclined mouth push rod 11 thereon to realize the feeding operation of vertical rotation. Rolling forming ring grooves 12 and 13 are provided on the outer sides of the front parts of the upper layer rollers 6 and the lower layer rollers 8. When the turntable 2 drives the upper layer rollers 6 and the lower layer rollers 8 to rotate horizontally, the lower end point of the movement track 14 at the bottom side of the rolling forming ring groove 12 of the upper layer rollers 6 is connected to the upper end point of the movement track 15 at the top side of the rolling forming ring groove 13 of the lower layer rollers 8 at point A. And when the vertically moving inclined mouth push rod 11 drives the lower layer rollers 8 to rotate vertically, the movement track 15 at the top side of the rolling forming ring groove 13 of the lower layer rollers 8 rotates with point A as the rotation axis, so as to realize curling the lower side of the top mouth edge of the metal packaging can inward and finally forming a shape with a circular cross-section.

[0018] The upper layer rollers 6 and the lower layer rollers 8 are arranged in a mutually staggered manner on the turntable 2.

[0019] The rolling forming annular grooves 12 of the upper layer rollers 6 and the rolling forming annular grooves 13 of the lower layer rollers 8 both adopt a semi-circular cross-sectional structure.

[0020] As Figure 4 and Figure 2 shown, the lower roller frame 9 is composed of a fixed frame 16 fixed on the turntable 2, a lever frame 17 rotatably fitted on the fixed frame 16, a first pulley 18 rotatably fitted on the fixed frame 16, a second pulley 19 rotatably fitted on the upper end of the lever frame 17, and a return tension spring 20 with one end connected to the fixed frame 16 and the other end connected to the upper end of the lever frame 17. The lower layer roller 8 is rotatably fitted at the lower end 21 of the lever frame. The lower inclined part 22 of the vertical movement inclined mouth push rod 11 is slidably fitted between the first pulley 18 and the second pulley 19.

[0021] The lower layer roller driving mechanism 10 is composed of a push rod frame 23 rotatably and slidably fitted on the mounting shaft 1 and drivingly connected to the driving wheel 3, a plurality of the vertical movement inclined mouth push rods 11 respectively fixed on the push rod frame 23, a push pressing disc 24 slidably fitted on the mounting shaft 1, a thrust bearing (not shown) installed between the push rod frame 23 and the push pressing disc 24, a cam driving mechanism 25 connected to the driving power, an upper push rod 27 slidably fitted on the machine frame 26 with one end connected to the push pressing disc 24 and the other end connected to the cam driving mechanism 25, and a return compression spring 28 sleeved on the upper push rod 27.

[0022] The feeding of the top mouth edge of the metal packaging can is realized by lifting the metal packaging can by a lifting mechanism (not shown) below the metal packaging can guiding disc 4.

[0023] During operation, the top opening of the metal packaging can is placed upward on the lifting mechanism below the metal packaging can guiding disc 4 and is gradually lifted by the lifting mechanism, so that the top opening of the metal packaging can is sleeved into the metal packaging can guiding disc 4 and then fed upward gradually. The metal packaging can guiding disc 4 not only plays a guiding role in the upward movement of the top opening of the metal packaging can, but also serves as an internal support for the top opening of the metal packaging can when it is roll-pressed by the outer rollers; after the top opening of the metal packaging can rises, it first enters the movement track 14 at the bottom side of the rolling forming ring groove 12 of the upper roller 6. The upper roller 6 rotates horizontally under the drive of the turntable 2 to roll-press the rim of the top opening of the metal packaging can, so that the rim of the top opening of the metal packaging can that turns outward is curled downward into a semi-circular cross-sectional shape; at this time, the lower side of the rim of the top opening of the metal packaging can enters the movement track 15 at the top side of the rolling forming ring groove 13 of the lower roller 8. The lower roller 8 rotates horizontally under the drive of the turntable 2 to continue roll-pressing the lower side of the rim of the top opening of the metal packaging can. At the same time, the cam driving mechanism 25 drives the vertical movement inclined mouth push rod 11 to descend through the upper push rod 27, the pressing disc 24, and the push rod frame 23. The lower inclined mouth 22 of the vertical movement inclined mouth push rod 11 pushes the lever frame 17 to rotate counterclockwise around the shaft 29. The rolling forming ring groove 13 at the top side of the lower roller 8 that is rotatably fitted at the lower end 21 of the lever frame gradually bends the lower side of the rim of the top opening of the metal packaging can inward, and finally forms the rim of the top opening of the metal packaging can into a circular cross-sectional structure.

Claims

1. A can mouth curling device for a metal packaging can manufacturing equipment, comprising a mounting shaft vertically arranged on a frame, a turntable rotatably fitted on the mounting shaft, a driving wheel rotatably fitted on the mounting shaft and drivingly connected to the turntable, a metal packaging can guiding disc fixed at the lower end of the mounting shaft, and a plurality of rolling wheels mounted on the turntable. Characterized in that: Some of the plurality of rolling wheels are fixedly installed and evenly distributed on the turntable through an upper roller frame to form an upper layer of rollers; some of the plurality of rolling wheels are rotatably installed and evenly distributed on the turntable through a lower roller frame to form a lower layer of rollers. The height position of the lower layer of rollers is lower than that of the upper layer of rollers. The can mouth curling device further includes a lower layer roller driving mechanism. The lower layer roller driving mechanism drives the lower layer of rollers to perform a feeding operation of vertical rotation through a vertical movement inclined mouth push rod thereon. Rolling forming ring grooves are provided on the outer sides of the front parts of the upper layer of rollers and the lower layer of rollers. When the turntable drives the upper layer of rollers and the lower layer of rollers to perform horizontal rotation, the lower end point of the movement track of the bottom side of the rolling forming ring groove of the upper layer of rollers is connected to the upper end point of the movement track of the top side of the rolling forming ring groove of the lower layer of rollers. And when the vertical movement inclined mouth push rod drives the lower layer of rollers to perform vertical rotation, the movement track of the top side of the rolling forming ring groove of the lower layer of rollers rotates around its upper end point, so as to realize curling the lower side of the top mouth edge of the metal packaging can inward and finally forming a shape with a circular cross section.

2. The can mouth curling device for a metal packaging can manufacturing equipment according to claim 1, Characterized in that The upper layer of rollers and the lower layer of rollers are arranged in a mutually staggered manner on the turntable.

3. The can mouth curling device for a metal packaging can manufacturing equipment according to claim 1 or 2, Characterized in that All the rolling forming ring grooves adopt a semi-circular cross-sectional structure.

4. The can mouth curling device for a metal packaging can manufacturing equipment according to claim 1 or 2, Characterized in that The lower roller frame is composed of a fixed frame fixed on the turntable, a lever frame rotatably fitted on the fixed frame, a first pulley rotatably fitted on the fixed frame, a second pulley rotatably fitted on the upper end of the lever frame, and a return tension spring with one end connected to the fixed frame and the other end connected to the upper end of the lever frame. The lower layer of rollers is rotatably fitted at the lower end of the lever frame. The inclined mouth lower part of the vertical movement inclined mouth push rod is slidably fitted between the first pulley and the second pulley.

5. The can mouth curling device for a metal packaging can manufacturing equipment according to claim 1 or 2, Characterized in that The lower layer roller driving mechanism is composed of a push rod frame rotatably and slidably fitted on the mounting shaft and drivingly connected to the driving wheel, a plurality of the vertical movement inclined mouth push rods respectively fixed on the push rod frame, a push pressing disc slidably fitted on the mounting shaft, a thrust bearing installed between the push rod frame and the push pressing disc, a cam driving mechanism connected to the driving power, an upper push rod slidably fitted on the frame with one end connected to the push pressing disc and the other end connected to the cam driving mechanism, and a return compression spring sleeved on the upper push rod.

6. The can mouth curling device used on the metal packaging can manufacturing equipment according to claim 1 or 2, characterized in that the feeding of the top mouth edge of the metal packaging can is realized by lifting the metal packaging can by a lifting mechanism under the metal packaging can guiding disc.

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