Molding device for internally-curled straight cylinder tank

Abstract

The utility model discloses a forming device of an internally-curled straight barrel can, which comprises a machine base, a rotating component capable of rotating relative to the machine base and a driving device for driving the rotating component to rotate are arranged on the machine base, and a processing cavity for a barrel-shaped blank to enter is arranged on the rotating component. The rotating assembly is provided with at least two hemming pieces extending into the machining cavity, the hemming pieces are rotationally connected to the rotating assembly, the rotating assembly is provided with a rotating shaft P1, the hemming pieces are distributed along the circumference with the rotating shaft P1 as the center, a rotating shaft P2 of each hemming piece is perpendicular to the rotating shaft P1, and the rotating shaft P2 of each hemming piece is perpendicular to the rotating shaft P1. The edge curling piece is provided with a bent face used for abutting against the edge of a barrel opening of the barrel-shaped blank after the barrel-shaped blank enters the machining cavity. The forming device for the internally-curled straight barrel can aims at overcoming the defects in the prior art and is compact in structure and good in edge curling effect.

Description

Technical Field

[0001] This utility model specifically relates to a forming device for an inner rolled edge straight cylindrical can. Background Technology

[0002] In the field of metal container manufacturing, cylindrical cans are widely used in the food, chemical, and daily necessities industries. Their ends typically require edge rolling to enhance the structural strength of the can's edges, improve its appearance, or facilitate subsequent sealing. Traditional edge rolling methods often employ stamping or single-point roll forming. These methods suffer from low efficiency, low processing accuracy, and poor edge rolling consistency, making it difficult to meet the demands of modern industry for high-volume, high-precision production.

[0003] Furthermore, existing hemming equipment often suffers from unstable hemming quality due to high frictional resistance and uneven force during processing, sometimes even resulting in defects such as edge deformation and wrinkling. At the same time, some equipment has complex structures and is inconvenient to adjust, making it difficult to adapt to processing requirements of different sizes or forms (such as inward or outward hemming), thus limiting its application range.

[0004] This utility model was developed precisely because of the aforementioned shortcomings. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a forming device for an inner-rolled straight-cylinder can with a compact structure and good rolling effect.

[0006] This utility model is achieved through the following technical solution:

[0007] This utility model provides a forming device for an inner rolled edge straight cylindrical can, including a base, a rotating assembly that can rotate relative to the base, and a driving device for driving the rotating assembly to rotate. The rotating assembly has a processing cavity for a cylindrical blank to enter, and at least two rolled edge members extending into the processing cavity are provided on the rotating assembly. The rolled edge members are rotatably connected to the rotating assembly. The rotating assembly has a rotating shaft P1, and the rolled edge members are distributed circumferentially around the rotating shaft P1. The rotating shaft P2 of the rolled edge members is perpendicular to the rotating shaft P1. The rolled edge members have a curved surface for abutting against the edge of the cylindrical blank opening after the cylindrical blank enters the processing cavity.

[0008] The forming apparatus for the inner rolled edge straight cylindrical can described above has an arc-shaped cross-section of the curved surface, which is arranged circumferentially with the rotation axis P2 of the rolled edge piece as the center.

[0009] The forming device for the inner rolled edge straight cylindrical can described above has three rolled edge components, which are evenly distributed around the rotation axis P1 of the rotating assembly.

[0010] As described above, the forming apparatus for an inner rolled edge straight cylindrical can includes a rotating assembly comprising a rotating seat, a connecting shaft for connecting a drive device, and a barrel-shaped mounting ring on the connecting shaft. The mounting ring surrounds and forms the processing cavity, and the rolled edge component is connected to the mounting ring.

[0011] As described above, in the forming apparatus for the inner rolled edge straight cylindrical can, the mounting ring is also connected in the processing cavity to a limiting center post that extends upward and is used to limit the cylindrical blank. The limiting center post is on the rotation shaft P1 of the rotating assembly.

[0012] As described above, in the forming device for the inner rolled edge straight cylindrical can, the mounting ring is provided with a bushing hole that penetrates its side wall and connects to the processing cavity. The bushing hole is provided with a bushing for mounting the rolled edge part. The bushing is provided with a mounting hole, and the rolled edge part passes through the mounting hole.

[0013] In the forming apparatus for the inner rolled edge straight cylindrical can described above, a bearing is provided between the rolled edge component and the wall of the mounting hole.

[0014] As described above, the forming device for the inner rolled edge straight cylinder can is provided with a deformation groove hole on the mounting ring that penetrates its side wall and connects to the processing cavity. The deformation groove hole is connected to the bushing hole. The mounting ring is also provided with a fastening hole that penetrates its upper and lower sides and passes through the deformation groove hole for installing fasteners.

[0015] The forming apparatus for the inner rolled edge straight cylindrical can as described above includes a circular material reduction hole and a slit hole that connects the material reduction hole and the bushing hole.

[0016] The forming device for the inner rolled edge straight cylindrical can as described above, wherein the driving device includes a driving component, a pulley assembly connected to the driving component, and a connecting sleeve connected to the pulley assembly, and the connecting sleeve is connected to the connecting shaft of the rotating seat.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. High processing efficiency and stable operation: This utility model uses a rotating assembly to drive multiple edge-rolling parts to rotate synchronously around the main shaft. The edge-rolling parts also rotate upon contact with the blank, effectively reducing frictional resistance and improving processing smoothness. Simultaneously, the coordinated operation of all components during the edge-rolling process allows the cylindrical blank to be quickly edge-rolled, significantly improving production efficiency and equipment stability.

[0019] 2. High edge curling precision and consistent product quality: The edge curling components are evenly distributed around the central axis of the rotating assembly, with a symmetrical structure and excellent dynamic balance, ensuring uniform force and consistent trajectory for each edge curling operation. Furthermore, positioning structures such as bending surfaces and limiting center pillars allow for precise control of the edge curling shape and dimensions, thereby guaranteeing product forming accuracy and batch-to-batch consistency, meeting high-quality production requirements.

[0020] 3. The structure is compact and reasonable, with strong adaptability and maintainability. The overall device adopts a modular design with a compact layout, reducing the size of the equipment while ensuring strength and stability. The rolled edge parts are installed through bushings and bearings, which facilitates disassembly and replacement, providing good adaptability and flexibility, and is conducive to diverse needs in practical applications and daily maintenance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the molding device of this utility model. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the molding device of this utility model. Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the rotating component of this utility model;

[0024] Figure 4 This is a cross-sectional schematic diagram of the rotating component of this utility model;

[0025] Figure 5 This is an exploded view of the rotating component of this utility model;

[0026] Figure 6 This is a schematic diagram of the rotating component of this utility model;

[0027] Figure 7 This is a schematic diagram of the rotating seat of this utility model. Detailed Implementation

[0028] The utility model will be further described below with reference to the accompanying drawings:

[0029] The orientations described in this utility model specification, such as "up," "down," "left," "right," "front," and "back," are based on the orientations in the accompanying drawings and are intended to facilitate the description of the relationships between the various components. They do not indicate the unique or absolute positional relationships between the various components, but are merely one embodiment of the utility model and are not a limitation on its implementation.

[0030] This utility model introduces a forming device for an inwardly rolled-edge straight-cylinder can, such as... Figures 1 to 5As shown, the device includes a base 1. The base 1 has a rotating assembly 2 that can rotate relative to it, and a drive device 3 that drives the rotating assembly 2 to rotate. The drive device 3 can be a motor, etc., with the motor's output shaft directly connected to the rotating assembly 2, or connected to the rotating assembly 2 through a transmission structure such as a gear set or pulley set. The rotating assembly 2 has a processing cavity 20 for a cylindrical blank A to enter. During use, the opening of the cylindrical blank A faces the processing cavity 20 when inserted. The rotating assembly 2 has at least two edge-rolling parts 21 that extend into the processing cavity 20, and these edge-rolling parts 21 are rotatably connected to the rotating assembly 2. The rotating assembly 2 has a rotation axis P1, and the edge-rolling parts 21 are distributed circumferentially around P1, with the rotation axis P2 of the edge-rolling parts 21 perpendicular to P1. The edge-rolling parts 21 have a curved surface 211 that abuts against the edge of the cylindrical blank A's opening after it enters the processing cavity 20.

[0031] like Figure 6 As shown, during use, the crimping member 21 rotates rapidly along the rotation axis P1. When the opening of the cylindrical blank A abuts against the bending surface 211, the crimping member 21 not only rotates around its own axis P2 but also rotates along the opening of the cylindrical blank A, reducing friction. When the cylindrical blank A is pressed downwards against the bending surface 211, a bend is formed at the opening A1 of the cylindrical blank A. In this embodiment, the opening A1 of the cylindrical blank A is bent from the outside in, but by appropriately adjusting the blank size and shape, a bend from the inside out can also be made. This structure can quickly and stably process the crimped structure of the cylindrical blank and ensure the accuracy and quality of the crimping.

[0032] like Figure 4 and Figure 6 As shown, in this embodiment, preferably, the cross-section of the curved surface 211 is arc-shaped and arranged circumferentially with the rotation axis P2 of the rolled edge 21 as the center. In order to manufacture rolled edges with different bending patterns, the curved surface 211 can also be designed as a non-arc shape, such as elliptical or spindle-shaped.

[0033] like Figure 5 As shown, three rolled edge pieces 21 are provided, evenly distributed around the rotation axis P1 of the rotating assembly 2 along the circumference, ensuring structural stability while making the entire device more compact. Of course, more rolled edge pieces 21 can be provided depending on the requirements of different processing environments. The even circumferential distribution helps the rotating assembly 2 achieve dynamic balance when rotating, but in special cases, it can also be unevenly distributed.

[0034] Detailed structure as follows Figure 5As shown, the main component of the rotating assembly 2 is a rotating seat 200, which is connected to the base 1 and rotates via a drive device 3. The rotating seat 200 has a connecting shaft 22 for connecting the drive device 3. In this embodiment, the drive device 3 includes a drive member 31, a pulley assembly 32 connected to the drive member 31, and a connecting sleeve 33 connected to the pulley assembly 32. The connecting sleeve 33 is connected to the connecting shaft 22 of the rotating seat 200. The drive member 31 is a device such as a motor that can drive the output shaft to rotate. One pulley of the pulley assembly 32 is connected to the output shaft of the drive member 31, and the other pulley is connected to the connecting sleeve 33. The connecting sleeve 33 is then connected to the connecting shaft 22, thereby driving the rotating seat 200 to rotate. Alternatively, the drive device 3 can also rotate by directly connecting the output shaft of a motor to the rotating seat 200. The connecting shaft 22 has a barrel-shaped mounting ring 23 that surrounds and forms the processing cavity 20, and the edge-rolling part 21 is connected to the mounting ring 23.

[0035] As a preferred option, such as Figures 4 to 6 As shown, the mounting ring 23 is also connected to a limiting center post 24 extending upwards and used to limit the cylindrical blank A in the processing cavity 20, located on the rotation axis P1 of the rotating assembly 2. The cylindrical surface of the limiting center post 24 is as close as possible to the flanged part 21, so that when the opening A1 of the cylindrical blank A is bent to a certain extent, it is restricted by the limiting center post 24, thereby forming a flange at the opening A1. At the same time, the limiting center post 24 also plays a role in the initial positioning when the cylindrical blank A is placed in.

[0036] As a further optimization, such as Figure 5 As shown, the mounting ring 23 has a bushing hole 231 that penetrates its sidewall and connects to the machining cavity 20. A bushing 25 for mounting the crimped part 21 is provided inside the bushing hole 231. The bushing 25 has a mounting hole 251, through which the crimped part 21 passes. To reduce the resistance when the crimped part 21 rotates and make its rotation smoother, a bearing 26 is provided between the crimped part 21 and the wall of the mounting hole 251.

[0037] Given that the rotating seat 200 rotates rapidly during operation, the rolled edge 21 is prone to displacement or loosening under centrifugal force and processing pressure. Therefore, to securely install and fix the bushing 25 and the rolled edge 21, ensuring their stability and firmness, the mounting ring 23 is also provided with a deformation groove 230 that penetrates its side wall and connects to the processing cavity 20. The deformation groove 230 communicates with the bushing hole 231. In addition, the mounting ring 23 is also provided with a fastening hole 232 that penetrates vertically and passes through the deformation groove 230 for installing fasteners. Fasteners (such as screws, bolts, nuts, and other standard parts) can be tightened through the fastening hole 232 to tighten the structure on both sides of the deformation groove 230, thereby clamping the bushing 25 and making the overall structure more stable. Preferably, the deformation groove 230 includes a circular material reduction hole 233 and a slot hole 234 that connects the material reduction hole 233 and the bushing hole 231. This not only saves material but also enhances ventilation and heat dissipation.

[0038] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A forming apparatus for an inwardly rolled-edge straight-cylinder can, characterized in that: The machine includes a base (1), on which a rotating assembly (2) capable of rotating relative to it is provided, and a driving device (3) for driving the rotating assembly (2) to rotate. The rotating assembly (2) is provided with a processing cavity (20) for the cylindrical blank to enter. The rotating assembly (2) is provided with at least two edge-rolling parts (21) extending into the processing cavity (20). The edge-rolling parts (21) are rotatably connected to the rotating assembly (2). The rotating shaft P1 of the rotating assembly (2) is located. The edge-rolling parts (21) are distributed circumferentially around the rotating shaft P1, and the rotating shaft P2 of the edge-rolling parts (21) is perpendicular to the rotating shaft P1. The edge-rolling parts (21) are provided with a curved surface (211) for abutting against the edge of the cylindrical blank after the cylindrical blank enters the processing cavity (20).

2. The forming apparatus for an inwardly rolled-edge straight-cylinder can according to claim 1, characterized in that: The curved surface (211) has an arc-shaped cross section and is arranged along the circumferential direction with the rotation axis P2 of the rolled edge (21) as the center.

3. The forming apparatus for an inwardly rolled-edge straight-cylinder can according to claim 1, characterized in that: The described rolled edge piece (21) is provided in three parts and is evenly distributed around the rotation axis P1 of the rotating assembly (2) along the circumference.

4. The forming apparatus for an inwardly rolled-edge straight-cylinder can according to any one of claims 1-3, characterized in that: The rotating assembly (2) includes a rotating seat (200), on which a connecting shaft (22) for connecting the drive device (3) is provided. A barrel-shaped mounting ring (23) is provided on the connecting shaft (22). The mounting ring (23) surrounds and forms the processing cavity (20). The rolled edge piece (21) is connected to the mounting ring (23).

5. The forming apparatus for an inwardly rolled-edge straight-cylinder can according to claim 4, characterized in that: The mounting ring (23) is also connected to a limiting center post (24) that extends upward and is used to limit the cylindrical blank in the processing cavity (20). The limiting center post (24) is on the rotation shaft P1 of the rotating assembly (2).

6. The forming apparatus for an inwardly rolled-edge straight-cylinder can according to claim 4, characterized in that: The mounting ring (23) is provided with a bushing hole (231) through which its sidewall passes and connects to the machining cavity (20). The bushing hole (231) is provided with a bushing (25) for mounting the rolled edge piece (21). The bushing (25) is provided with a mounting hole (251). The rolled edge piece (21) passes through the mounting hole (251).

7. The forming apparatus for an inwardly rolled-edge straight-cylinder can according to claim 6, characterized in that: A bearing (26) is provided between the rolled edge (21) and the wall of the mounting hole (251).

8. The forming apparatus for an inwardly rolled-edge straight-cylinder can according to claim 6, characterized in that: The mounting ring (23) is also provided with a deformation groove (230) that penetrates its side wall and connects to the machining cavity (20). The deformation groove (230) is connected to the bushing hole (231). The mounting ring (23) is also provided with a fastening hole (232) that penetrates it vertically and passes through the deformation groove (230) for mounting fasteners.

9. The forming apparatus for an inwardly rolled-edge straight-cylinder can according to claim 8, characterized in that: The deformation slot (230) includes a circular material reduction hole (233), a slit hole (234) that connects the material reduction hole (233) and the bushing hole (231).

10. The forming apparatus for an inwardly rolled-edge straight-cylinder can according to claim 1, characterized in that: The drive device (3) includes a drive component (31), a pulley assembly (32) connected to the drive component (31), and a connecting sleeve (33) connected to the pulley assembly (32). The connecting sleeve (33) is connected to the connecting shaft (22) of the rotating seat (200).

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