Hollow tank trimming mechanism

Abstract

The utility model provides a hollow tank body trimming mechanism which comprises a positioning seat and at least one tool bit assembly, each tool bit assembly comprises a group of blades which are mutually matched in a shearing mode, and a meshing point acting on an opening portion of a hollow tank body is arranged between the two blades. The hollow tank body moves along the moving track and passes through the meshing points; the positioning seat is provided with a plurality of static parts, each tool bit assembly is provided with a moving part, and the static parts are matched with the moving parts in a one-to-one alignment mode. The static parts or the moving parts have an extension length, and the moving parts move relative to the corresponding static parts in the direction of the extension length. In the model changing process, the moving track of the hollow tank body is not changed, only the tool bit assembly is made to move close to or away from the moving track in the model changing process, then position change of other parts caused by the change of the moving track of the hollow tank body does not need to be replaced, the model changing process is simple, adjusting steps are simple, and the cost is low. And time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the field of processing equipment for hollow tank bodies, in particular to a hollow tank body trimming mechanism. Background Art

[0002] Hollow cans generally refer to cans composed of three pieces or two pieces. Three-piece cans refer to cans composed of the can body, can cover and can bottom, and two-piece cans refer to cans composed of the can body and can cover. Hollow cans have the advantages of good sealing, strong firmness and economical and practical, so they are widely used in food, battery and cosmetic industries.

[0003] The can body needs to be stretched and formed by a stretching device, and then enter the trimming mechanism for trimming processing to remove the burrs on the mouth of the can body. Due to the different specifications of the hollow can body (such as different can diameters), when trimming the hollow can bodies with different can diameters, it is necessary to replace the parts of the trimming mechanism or change the original position of the parts of the trimming mechanism to adapt to the trimming processing of hollow can bodies with different can diameters.

[0004] The trimming mechanism in the prior art, when trimming hollow tanks with different tank diameters, takes the following operations: adjusting the moving trajectory of the hollow tank, removing the original guide rails, and adjusting the distance between the guide rails and the positional relationship between the guide rails and the moving trajectory of the hollow tank, so as to piece together a suitable path for the hollow tank. Due to the change in the moving trajectory of the hollow tank, it is also necessary to remove the gears that drive the hollow tank to rotate. This process involves the replacement of many parts, and the subsequent adjustment steps are cumbersome, wasting time and manpower.

[0005] Therefore, how to solve the above-mentioned deficiencies in the prior art has become a topic to be studied and solved in the present invention. Summary of the invention

[0006] The utility model aims to provide a hollow tank body trimming mechanism to solve the problem that many parts need to be replaced when trimming hollow tank bodies with different tank diameters.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is: a hollow can trimming mechanism, including: a positioning seat; at least one cutter head assembly, each of which is movably connected to the positioning seat, each of which includes a group of blades that shear each other, and there is an engagement point between the two blades, which acts on the mouth of the hollow can; a moving track, along which the hollow can moves and passes through the engagement points in each cutter head assembly; the positioning seat has a plurality of stationary parts, each of which has a moving part, and each of the stationary parts is aligned with each of the moving parts; the stationary part or the moving part has an extension length, and the moving part moves relative to the corresponding stationary part along the direction of the extension length, and changes the distance between the cutter head assembly and the moving track. .

[0008] According to a further technical solution, the stationary part includes a bolt, and the movable part includes a through hole; the positioning seat is fixedly connected to the bolt, the cutter head assembly has the through hole, and the through hole has the extension length. The through hole moves along the direction of its extension length and moves relative to the corresponding bolt, and after the movement, the bolt can fix the cutter head assembly on the positioning seat.

[0009] A further technical solution also includes a guide member, which is arranged in a one-to-one correspondence with the cutter head assembly, and each guide member is located between each cutter head assembly and the moving trajectory, and a guide channel is formed between each cutter head assembly and the moving trajectory for each cutter head assembly to approach or move away from the moving trajectory.

[0010] According to a further technical solution, the guide member includes a guide groove or a guide rail.

[0011] According to a further technical solution, each of the cutter head assemblies also has a limiting groove, and the limiting groove is located on the side of the cutter head assembly opposite to the moving part; it also includes a limiting member, which is fixedly arranged on the positioning seat; the limiting member cooperates with the limiting groove and limits the direction of movement of the cutter head assembly along the corresponding guide channel.

[0012] A further technical solution also includes two groups of guide rail assemblies for transmitting the hollow can body, and the two groups of guide rail assemblies are respectively arranged at the starting end and the ending end of the positioning seat; each of the guide rail assemblies includes a group of guide rail parts arranged in pairs and a cup-moving part located between the two guide rail parts, and the moving trajectory is located between the two guide rail parts arranged in pairs; the cup-moving part rotates around its own axis and drives the hollow can body to move along the moving trajectory; the cup-moving part is fixedly connected to at least one of the guide rail parts.

[0013] According to a further technical solution, the cupping part includes a first connecting shaft, a second connecting shaft and at least one dial located on the second connecting shaft, at least one of the dials rotates around the first connecting shaft and the second connecting shaft and drives the hollow cup body to move; the first connecting shaft is arranged on the positioning seat, and the second connecting shaft is connected to the first connecting shaft.

[0014] According to a further technical solution, the connection between the first connecting shaft and the second connecting shaft includes: a fixed connection or a detachable connection.

[0015] According to a further technical solution, the positioning seat is circular in shape, and the positioning seat can rotate along its own axis and drive the hollow tank body located on the positioning seat to rotate.

[0016] According to a further technical solution, the number of the cutter head assemblies is three, and the three cutter head assemblies are evenly distributed around the circumference of the positioning seat.

[0017] The working principle and advantages of this utility model are as follows:

[0018] During trimming, the hollow can body moves along a moving track and passes through each cutter head assembly. Each cutter head assembly includes a group of blades that cooperate with each other in shearing, and there is an engagement point between the two blades for shearing the mouth of the hollow can body. When the trimming of a batch of hollow can bodies is completed and another batch of hollow can bodies with a different mouth diameter from the previous batch of hollow can bodies needs to be trimmed, it is necessary to replace the parts of the trimming mechanism or change the original positions of the parts of the trimming mechanism to adapt to the trimming of the mouth of the batch of hollow can bodies.

[0019] The utility model does not change the moving trajectory of the hollow can body when changing the shape, and only makes the cutter head assembly move closer to or farther away from the moving trajectory during the changing process until the meshing point acts on the mouth of the hollow can body. There is no need to replace the positions of other parts caused by the change of the moving trajectory of the hollow can body. The changing process is simple, the adjustment steps are concise, and time and manpower are saved. Moreover, since the number of disassembly and assembly of parts is reduced, mechanical errors caused by disassembly and assembly are avoided, and the precision requirements of trimming processing of different can shapes are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attached Figure 1 This is a schematic diagram of a hollow tank trimming mechanism according to an embodiment of the utility model;

[0021] Attached Figure 2 It is a schematic diagram of the hollow can body trimming mechanism of the embodiment of the utility model for trimming the hollow can body of the 211 can type;

[0022] Attached Figure 3It is a schematic diagram of the hollow can body trimming mechanism of the embodiment of the utility model for trimming the hollow can body of the 204 can type;

[0023] Attached Figure 4 The front view and top view of the cupping part of the embodiment of the utility model;

[0024] In the above attached figure:

[0025] 1-cutter head assembly; 2-moving track; 3-positioning seat; 4-guide rail assembly; 5-hollow tank body;

[0026] 11-blade; 12-engagement point;

[0027] 31-through hole; 32-bolt; 33-limiting member; 34-limiting groove;

[0028] 41-guide rail part; 42-cupping part;

[0029] 421-first connecting shaft; 422-second connecting shaft; 423-dial;

[0030] 4231-arc-shaped nest. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0032] Embodiment: The present invention will be clearly described below with diagrams and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0033] The terms used herein are only for describing specific embodiments and are not intended to be limiting of the present invention. Singular forms such as "a", "this", "here", "this" and "the" as used herein also include plural forms.

[0034] The terms “first”, “second”, etc. used in this document do not specifically refer to an order or sequence, nor are they used to limit the present case. They are only used to distinguish components or operations described with the same technical terms.

[0035] As used herein, “connected” or “positioned” may refer to two or more components or devices being in direct physical contact with each other, or being in indirect physical contact with each other, or may refer to two or more components or devices operating or moving with each other.

[0036] The terms “include,” “including,” “have,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0037] The terms used in this document generally have the ordinary meaning of each term used in this field, in the context of the case and in the specific context, unless otherwise noted. Certain terms used to describe the present invention will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present invention.

[0038] The terms "front", "back", "up", "down", "left", "right", etc. used in this article are all directional terms. In this case, they are only used to illustrate the positional relationship between the various structures, and are not used to limit the protection plan of this case and the specific direction during actual implementation.

[0039] See attached Figure 1 As shown, this embodiment provides a hollow can body trimming mechanism, including a positioning seat 3 and at least one cutter head assembly 1, each cutter head assembly 1 is movably connected to the positioning seat 3, each cutter head assembly includes a group of blades 11 that shear each other, and there is an engagement point 12 between the two blades 11, and the engagement point 12 acts on the mouth of the hollow can body 5, and is used to remove burrs on the mouth of the hollow can body 5, or to adjust the height of the can body.

[0040] It is understandable that when trimming the hollow can body 5 , on the one hand, the two blades 11 need to rotate to achieve the cutting effect; on the other hand, the hollow can body 5 also needs to rotate to trim the entire circumference of the hollow can body 5 .

[0041] It also includes a moving track 2, the hollow can body 5 moves along the moving track 2 and passes through the meshing points 12 in each cutter head assembly. Each cutter head assembly 1 moves closer to or away from the moving track 2 according to the diameter of the hollow can body 5 to be trimmed, until the above-mentioned meshing point 12 acts on the mouth of the hollow can body 5.

[0042] In this embodiment, the movement trajectory 2 includes three sections, namely, a first movement trajectory of the hollow tank body 5 moving into the positioning seat 3, a second movement trajectory of the hollow tank body 5 moving on the positioning seat 3, and a third movement trajectory of the hollow tank body 5 moving away from the positioning seat 3.

[0043] Optionally, the moving track 2 may be a straight line, a curve, or other irregular linear shapes, which is not limited in this embodiment.

[0044] In this embodiment, when trimming the hollow can bodies 5 with different can diameters, it is not necessary to change the moving track 2 of the hollow can body 5, but the position of the cutter head assembly 1 is changed to make the cutter head assembly 1 move relative to the moving track 2, so that the meshing points 12 of each cutter head assembly 1 act on the mouth of the hollow can body 5 on the moving track 2. In this process, it is only necessary to adjust the positions of the cutter head assembly 1 and some parts related to the cutter head assembly 1, the changeover process is simple, the adjustment steps are concise, and time and manpower are saved.

[0045] Among them, the changeover refers to the process in which the parts of the original trimming mechanism need to be replaced when the same trimming mechanism is converted to trim the hollow can bodies 5 with different can diameters and needs to be adapted to trim the mouths of the hollow can bodies with different can diameters.

[0046] See also Figure 2 or Figure 3 , the positioning seat 3 is circular in shape, and the positioning seat can rotate along its own axis, and drive the hollow can body 5 on the positioning seat to rotate; the number of the cutter head assemblies 1 is three, and the three cutter head assemblies 1 are evenly distributed around the circumference of the positioning seat 3, that is, in this embodiment, the three hollow can bodies 5 can be trimmed at the same time. Specifically: the hollow can body 5 enters the positioning seat 3 along the first moving trajectory, and then the positioning seat 3 starts to rotate and transports the hollow can body 5 to the cutter head assembly 1 close to the third moving trajectory. At the same time, the positioning seat 3 rotates and also transports the two hollow can bodies 5 that enter the positioning seat 3 along the first moving trajectory to the corresponding other two cutter head assemblies 1 in sequence. After the three hollow can bodies 5 are correspondingly located in the cutter head assembly 1, on the one hand, the two blades in the cutter head assembly 1 begin to rotate, and on the other hand, the hollow can body 5 also rotates.

[0047] In this embodiment, the positioning seat 3 has multiple stationary parts, and each cutter head assembly 1 has a moving part, and each stationary part is matched with each moving part one by one; the stationary part or the moving part has an extended length, and the moving part moves relative to the corresponding stationary part along the direction of the extended length, and the distance between the cutter head assembly and the moving trajectory changes.

[0048] Optionally, the stationary part is a through hole 31, and the moving part is a bolt 32. The bolt 32 is fixedly connected to the cutter head assembly 1 and moves in the through hole 31 as the cutter head assembly moves. After moving to a suitable position, the bolt 32 can be tightened to fix the cutter head assembly 1 on the positioning seat 3.

[0049] In this embodiment, the stationary part is a bolt 32, and the moving part is a through hole 31. The through hole 31 moves with the movement of the cutter head assembly 1, so that the bolt 32 moves relatively inside the through hole 31. When the cutter head assembly moves to a suitable position, the bolt 32 can be tightened to fix the cutter head assembly 1 on the positioning seat 3.

[0050] The cutter head assembly 1 needs to be standardized during the movement process. For example, when the moving track 2 is a straight line, the moving direction of the cutter head assembly 1 needs to be perpendicular to the extension direction of the moving track. In this embodiment, part of the moving track 2 (the second moving track) is an arc shape, and the moving direction of the cutter head assembly 1 needs to move along the radial direction of the arc shape.

[0051] In order to achieve the above-mentioned purpose, the present embodiment further includes a guide member and a limit member. The guide members are arranged one by one with the cutter head assemblies 1, and each guide member is located between each cutter head assembly 1 and the moving track 2, and a guide channel (not shown in the figure) is formed between each cutter head assembly 1 and the moving track 2 for the cutter head assembly 1 to approach or move away from the moving track 2.

[0052] Optionally, the guide member may be a guide groove or a guide track. For example, the positioning seat 3 has the guide groove, and the cutter head assembly 1 moves along the guide groove, or the positioning seat 3 is provided with a guide track, and the cutter head assembly 1 moves along the guide track.

[0053] Furthermore, in order to limit the moving direction of the cutter head assembly 1 from being offset, in addition to the guide member, in the present embodiment, each cutter head assembly 1 has a limiting groove 34, and the limiting groove 34 is located on the side of the cutter head assembly opposite to the moving member; it also includes a limiting member 33, which is fixedly arranged on the positioning seat 13, and the limiting member 33 cooperates with the limiting groove 34 and limits the movement of the cutter head assembly 1 along the corresponding guide channel.

[0054] Specifically, the limiting member 33 is a cylinder, and the limiting groove 34 is an arc-shaped surface that fits with the side surface of the cylinder.

[0055] Please continue to see Figure 1 When the trimming mechanism needs to trim the hollow can bodies 5 with different can diameters, the movement of each cutter head assembly 1 specifically includes: if the diameter of the hollow can body 5 to be trimmed is increased compared with the diameter of the previous hollow can body 5 trimmed by the trimming mechanism, since the position of the moving track 2 remains unchanged, that is, the position of the center of the hollow can body 5 located on the moving track 2 remains unchanged, when the can diameter increases, it means that the distance between the mouth of the hollow can body 5 acted by the meshing point 12 of the blade assembly 1 and the moving track 2 also increases, then it is necessary to make each cutter head assembly 1 move away from the moving track 2; if the diameter of the hollow can body 5 to be trimmed is reduced compared with the diameter of the previous hollow can body 5 trimmed by the trimming mechanism, since the position of the moving track 2 remains unchanged, that is, the position of the center of the hollow can body 5 located on the moving track 2 remains unchanged, when the can diameter decreases, it means that the distance between the mouth of the hollow can body 5 acted by the meshing point 12 of the blade assembly 1 and the moving track 2 also decreases, then it is necessary to make each cutter head assembly 1 move closer to the moving track 2.

[0056] Specific, combined Figure 2 and Figure 3 As shown, Figure 2 It is a schematic diagram showing the trimming of the hollow tank body 5 of the 211 tank type. Figure 3 It is a schematic diagram showing the trimming of the hollow can body 5 of the 204 can type. The diameter of the 211 can type is 66 mm, and the diameter of the 204 can type is 57.4 mm, that is, the diameter of the 211 can type is larger than that of the 204 can type.

[0057] Figure 2 In the figure, the distance between the cutter head positioning arc and the center of the positioning seat 3 is h1. Figure 3 In the figure, the distance between the cutter head positioning arc and the center of the positioning seat is h2, and h1 is smaller than h2. In contrast, when trimming the hollow can body 5 with a large diameter, the distance between the cutter head positioning arc and the center of the positioning seat 3 is small, and when trimming the hollow can body 5 with a small diameter, the distance between the cutter head positioning arc and the center of the positioning seat 3 is large; in other words, when the can diameter increases, the cutter head positioning arc moves inward to increase the distance between the meshing point 12 and the moving trajectory 2.

[0058] Please continue to see Figure 1 In this embodiment, two sets of guide rail assemblies 4 are further included for transporting the hollow tank body 5, and the two sets of guide rail assemblies 4 are respectively arranged at the starting end and the ending end of the positioning seat 3. The starting end is the end where the hollow tank body 5 enters the positioning seat 3, and the ending end is the end where the hollow tank body 5 leaves the positioning seat 3.

[0059] Specifically, each guide rail assembly 4 includes a pair of guide rail portions 41 and a cup-shifting portion 42 located between the two guide rail portions 41, and the cup-shifting portion 42 is used to stably transfer the hollow can body 5 into the positioning seat 3; the moving track 2 is located between the two guide rail portions 41 arranged in pairs; the cup-shifting portion 42 rotates around its own axis, and when the hollow can body 5 moves to the cup-shifting portion, the cup-shifting portion 424 drives the hollow can body 5 to move along the moving track 2.

[0060] For further information, see Figure 4 The cup-moving portion 42 includes a first connecting shaft 421, a second connecting shaft 422, and at least one dial 423 located on the second connecting shaft 422. The at least one dial 423 rotates around the first connecting shaft 421 and the second connecting shaft 422, and drives the hollow can body 5 to move. The first connecting shaft 421 is disposed on the positioning seat 3, and the second connecting shaft 422 is connected to the first connecting shaft 421.

[0061] Optionally, the first connecting shaft 421 and the second connecting shaft 422 are fixedly connected or detachably connected.

[0062] In this embodiment, the dial 423 has a plurality of arc-shaped recesses 4231 , and the arc-shaped recesses 4231 are used to stably drive the hollow can body 5 to move.

[0063] Considering that after the change of model, the distance between the two guide rail portions 41 arranged in pairs may not be able to meet the transmission of hollow can bodies 5 of different diameters, it is necessary to replace the guide rail assembly 4, or adjust the position of the guide rail portion 41 and / or the cup-moving portion 42 in the guide rail assembly 4. In order to further save the operating steps after the change of model, in this embodiment, the cup-moving portion 42 is fixedly connected to at least one guide rail portion 41.

[0064] In one embodiment, the first connecting shaft 421 and the second connecting shaft 422 of the cup-moving portion 42 are fixedly connected, and the cup-moving portion 42 is fixedly connected to the two guide rail portions 41, that is, the entire guide rail assembly 4 is fixedly connected; when a change of type is required, the entire guide rail assembly 4 is replaced and replaced with another guide rail assembly 4 that is fixedly connected as a whole to adapt to different cup diameters, and the overall replacement method saves change of type time.

[0065] In another embodiment, the first connecting shaft 421 and the second connecting shaft 422 of the cupping portion 42 are detachably connected, the first connecting shaft 421 is arranged on the positioning seat 3, and the portion of the cupping portion 42 except the first connecting shaft 421 is fixedly connected to a guide rail portion 41; when the type needs to be changed, only the portion of the cupping portion 42 except the first connecting shaft 421 and the guide rail portion 41 connected thereto need to be replaced, and the first connecting shaft 421 and the other guide rail portion 41 do not need to be replaced, thereby saving the type change time.

[0066] In this embodiment, a first gear (not shown in the figure) for driving the hollow can body 5 to rotate and a second gear (not shown in the figure) for driving the cupping portion 42 to rotate are also included, and the first gear and the second gear are meshed with each other.

[0067] In this embodiment, during the changeover process, the moving trajectory of the hollow can body 5 remains unchanged, and only the position of the cutter head assembly 1 changes. Therefore, the position of the first gear remains unchanged, and the position of the second gear meshing with the first gear does not need to be changed, thereby saving the changeover step.

[0068] The working process of the existing utility model is as follows:

[0069] The cutter head assembly 1 moves toward or away from the moving track 2 according to the diameter of the hollow can body 5. If the diameter of the hollow can body 5 to be trimmed is larger than the diameter of the last hollow can body 5 trimmed by the trimming mechanism, each cutter head assembly 1 moves away from the moving track 2; if the diameter of the hollow can body 5 to be trimmed is smaller than the diameter of the last hollow can body 5 trimmed by the trimming mechanism, each cutter head assembly 1 moves toward the moving track 2.

[0070] Replace all parts of the guide rail assembly 4, or replace some parts of the guide rail assembly 4, so that the guide rail assembly 4 is adapted to the transmission of hollow tank bodies 5 with different tank diameters, and the replacement steps are relatively few, saving time;

[0071] This is the entire conversion process.

[0072] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A hollow tank trimming mechanism, characterized in that: include: Positioning seat (3); At least one cutter head assembly (1), each of the cutter head assemblies (1) being movably connected to the positioning seat (3), each of the cutter head assemblies (1) comprising a set of blades (11) that shear against each other, and a meshing point (12) between two of the blades (11), the meshing point (12) acting on the mouth of the hollow can body (5); A moving track (2), the hollow tank body (5) moves along the moving track (2) and passes through the meshing points (12) in each cutter head assembly (1); The positioning seat (3) has a plurality of stationary parts, and each of the tool head assemblies (1) has a moving part, and each of the stationary parts is aligned with each of the moving parts; the stationary part or the moving part has an extended length, and the moving part moves relative to the corresponding stationary part along the direction of the extended length, thereby changing the distance between the tool head assembly (1) and the moving track (2).

2. The hollow can body trimming mechanism according to claim 1, characterized in that: The stationary part includes a bolt (32), and the moving part includes a through hole (31); The positioning seat (3) is fixedly connected to the bolt (32); the cutter head assembly (1) has the through hole (31); the through hole (31) has the extension length; the through hole (31) moves along the direction of its extension length and moves relative to the corresponding bolt (32); and after the movement, the bolt (32) can fix the cutter head assembly (1) on the positioning seat (3).

3. The hollow can body trimming mechanism according to claim 1, characterized in that: The invention also comprises a guide member, wherein the guide member is arranged in a one-to-one correspondence with the cutter head assembly (1), and each guide member is located between each cutter head assembly (1) and the moving track (2), and a guide channel is formed between each cutter head assembly (1) and the moving track (2) for each cutter head assembly (1) to approach or move away from the moving track (2).

4. The hollow can body trimming mechanism according to claim 3, characterized in that: The guide member comprises a guide groove or a guide rail.

5. The hollow can body trimming mechanism according to claim 3, characterized in that: Each of the cutter head assemblies (1) also has a limiting groove (34), and the limiting groove (34) is located on a side of the cutter head assembly (1) opposite to the moving part; It also includes a limiting member (33) which is fixedly arranged on the positioning seat (3); the limiting member (33) cooperates with the limiting groove (34) and limits the direction in which the cutter head assembly (1) moves along the corresponding guide channel.

6. The hollow can body trimming mechanism according to claim 1, characterized in that: It also includes two sets of guide rail assemblies (4) for transporting the hollow tank body (5), and the two sets of guide rail assemblies (4) are respectively arranged at the starting end and the ending end of the positioning seat (3); Each of the guide rail assemblies (4) comprises a group of guide rail portions (41) arranged in pairs and a cupping portion (42) located between the two guide rail portions (41), and the moving track (2) is located between the two guide rail portions (41) arranged in pairs; The cupping portion (42) performs rotational motion around its own axis, and drives the hollow can body (5) to move along the moving track (2); The cupping portion (42) is fixedly connected to at least one of the guide rail portions (41).

7. The hollow can body trimming mechanism according to claim 6, characterized in that: The cup-moving portion (42) comprises a first connecting shaft (421), a second connecting shaft (422), and at least one dial (423) located on the second connecting shaft (422); the at least one dial (423) rotates around the first connecting shaft (421) and the second connecting shaft (422), and drives the hollow cup body (5) to move; The first connecting shaft (421) is arranged on the positioning seat (3), and the second connecting shaft (422) is connected to the first connecting shaft (421).

8. The hollow can body trimming mechanism according to claim 7, characterized in that: The connection method of the first connecting shaft (421) and the second connecting shaft (422) includes: fixed connection or detachable connection.

9. The hollow can body trimming mechanism according to claim 1, characterized in that: The positioning seat (3) is circular in shape, and the positioning seat (3) can rotate along its own axis and drive the hollow tank body (5) located on the positioning seat (3) to rotate.

10. The hollow can body trimming mechanism according to claim 1, characterized in that: The number of the cutter head assemblies (1) is three, and the three cutter head assemblies (1) are evenly distributed around the circumference of the positioning seat (3).

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