Cutting structure and tissue packaging machine

Abstract

This application relates to a cutting structure and a tissue packaging machine. The cutting structure includes: a bottom knife assembly, comprising a mounting base, a bottom knife holder, and a bottom knife body. The bottom knife holder is configured to move closer to or further away from the mounting base in a first direction under the action of an external force. The bottom knife body is located on the side of the bottom knife holder away from the mounting base in the first direction. A top knife assembly includes a top knife holder and a top knife body. The top knife holder is movable relative to the mounting base. The top knife body is located on the top knife holder, and during the movement of the top knife holder, the blade of the top knife body can contact the side of the bottom knife body away from the mounting base in the first direction. The bottom knife holder then moves towards the mounting base under the contact force between the top knife body and the bottom knife body. Thus, the movement of the bottom knife holder buffers the contact force between the top knife body and the bottom knife body, thereby reducing wear between them and increasing their service life.

Description

Technical Field

[0001] This application relates to the field of packaging machine technology, and in particular to a cutter structure and a tissue packaging machine. Background Technology

[0002] In automated tissue packaging, to ensure efficient production, the film is pre-placed, stretched, cut, and fed. These steps complete the formation of a single packaging film, which is then used for packaging upon arrival. The design and adjustment of the film-cutting assembly play a crucial role in the formation of this single packaging film, requiring stable cutting results and high-speed cutting capabilities.

[0003] Currently, tissue packaging machines typically use a face blade and a bottom blade to form a film-cutting assembly. The packaging film passes between the face blade and the bottom blade. After rotating 360°, the face blade engages with the bottom blade to cut the packaging film. Therefore, the distance between the face blade and the bottom blade needs to be precisely adjusted to ensure the face blade is as close to the bottom blade as possible, guaranteeing a good cutting effect. However, if the distance between the face blade and the bottom blade is too close, it will cause them to collide, reducing the lifespan of both blades. In more severe cases, it can even cause the blades of both blades to break, rendering them unusable. Utility Model Content

[0004] Therefore, it is necessary to provide a cutting structure and a paper packaging machine to address the problem that the close distance between the face blade and the bottom blade will cause them to collide, which will reduce the service life of both blades.

[0005] A cutting blade structure, comprising:

[0006] A bottom cutter assembly includes a mounting base, a bottom cutter holder, and a bottom cutter body. The bottom cutter holder is configured to move closer to or further away from the mounting base in a first direction under the action of an external force. The bottom cutter body is located on the side of the bottom cutter holder that is further away from the mounting base in the first direction.

[0007] A face knife assembly includes a face knife holder and a face knife body. The face knife holder is movable relative to the mounting base. The face knife body is disposed on the face knife holder. During the movement of the face knife body with the face knife holder, the blade of the face knife body can contact the side of the bottom knife body away from the mounting base in a first direction. The contact force between the face knife body and the bottom knife body has a component force parallel to the first direction, or the contact force is parallel to the first direction.

[0008] In one embodiment, the bottom cutter assembly further includes an elastic element disposed between the bottom cutter holder and the mounting base, and the elastic element accumulates an elastic force to move the bottom cutter holder away from the mounting base when the bottom cutter holder approaches the mounting base.

[0009] In one embodiment, the bottom knife assembly further includes an adjusting bolt, the mounting base has an adjusting hole extending through along the first direction, and the mounting base has a mounting hole;

[0010] The adjusting bolt includes a bolt head and a bolt shank. The bolt shank passes through the adjusting hole and is threadedly connected to the mounting hole. The bolt head is located on the side of the mounting base away from the bottom knife seat, and the diameter of the bolt head is larger than the diameter of the adjusting hole.

[0011] In one embodiment, the elastic element includes a plurality of spring washers, all of which are fitted onto the bolt rod.

[0012] In one embodiment, the mounting base includes a fixing part and two limiting parts. One end of each limiting part is disposed on the fixing part, and the other end extends longitudinally in a direction away from the fixing part. The two limiting parts are spaced apart along the second direction. The bottom knife seat is located between the two fixing parts. The second direction intersects with the first direction.

[0013] In one embodiment, a portion of the bottom blade body extends out of the mounting base, and the face blade body is able to contact the portion of the bottom blade body that extends out of the mounting base.

[0014] In one embodiment, the face knife holder is rotatable about its own axis, the axis of the face knife holder intersects the first direction, and the axis of the face knife holder is parallel to the extension direction of the blade of the face knife body, and the end of the face knife body with the blade extends along the tangential direction of the surface of the face knife holder.

[0015] The surface of the bottom blade body that contacts the bottom blade body is inclined relative to the first direction and is not perpendicular to it.

[0016] In one embodiment, the bottom blade assembly further includes a bottom blade pressing block, which is disposed on the bottom blade holder and presses the bottom blade body against the bottom blade holder.

[0017] In one embodiment, the face knife assembly further includes a face knife pressing block, which is disposed on the face knife holder and presses the face knife body against the face knife holder.

[0018] A tissue packaging machine includes a packaging film and a cutting structure as described in any of the preceding claims, wherein a film channel is formed between the bottom blade assembly and the top blade assembly, and the packaging film passes through the film channel.

[0019] In the aforementioned cutting structure, when the face blade body contacts the bottom blade body, the contact force causes the bottom blade holder to move closer to the mounting base, compressing the elastic element. The contact force is absorbed by the movement of the mounting base and the compression of the elastic element, thus improving the absorption effect of the impact force between the face blade body and the bottom blade body. Furthermore, after the packaging film is cut and the face blade holder and face blade body move away from the bottom blade body, the bottom blade holder will move away from the mounting base under the action of the elastic element, thereby restoring the position of the bottom blade body and ensuring that the face blade body can make normal contact with the bottom blade body during the next round of packaging film cutting. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the cutter structure in some embodiments of this application.

[0021] Figure 2 for Figure 1 A schematic diagram of the bottom blade assembly in the cutting structure of the embodiment.

[0022] Figure 3 for Figure 2 Side view of the bottom blade assembly in the embodiment.

[0023] Figure 4 for Figure 1 A schematic diagram of the face knife structure in the embodiment.

[0024] Figure 5 for Figure 4 A partial cross-sectional schematic diagram of the face knife structure in the embodiment.

[0025] Explanation of reference numerals in the attached figures:

[0026] Bottom blade assembly 10; mounting base 11, bottom blade holder 12, bottom blade body 13; elastic element 14; adjusting bolt 15; mounting hole 17; bolt head 18; spring washer 19;

[0027] Fixing part 20; limiting part 21; bottom knife pressing block 22; bottom knife pressing hole 23;

[0028] 30. Noodle knife assembly; 31. Noodle knife holder; 32. Noodle knife body; 33. Noodle knife pressing block; 34. Noodle knife bolt; 35. Noodle knife fixing hole;

[0029] First direction X; second direction Y; third direction Z. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0036] See Figure 1 , Figure 1 The diagram shows a schematic of the cutter structure in one embodiment of the present application. The cutter structure provided in one embodiment of the present application includes a bottom cutter assembly 10 and a top cutter assembly 30. The bottom cutter assembly 10 and the top cutter assembly 30 are spaced apart from each other so that a film channel is formed between the bottom cutter assembly 10 and the top cutter assembly 30. The packaging film that needs to be separated by the cutter structure passes through the film channel.

[0037] The bottom blade assembly 10 includes a mounting base 11, a bottom blade holder 12, a bottom blade body 13, and an elastic element 14. The bottom blade holder 12 is configured to move closer to or further away from the mounting base 11 along a first direction X under the action of an external force. The bottom blade body 13 is located on the side of the bottom blade holder 12 away from the mounting base 11 in the first direction X. The face blade assembly 30 includes a face blade holder 31 and a face blade body 32. The face blade holder 31 is movable relative to the mounting base 11. The face blade body 32 is located on the face blade holder 31. During the movement of the face blade body 32 with the face blade holder 31, the cutting edge of the face blade body 32 can contact the side of the bottom blade body 13 away from the mounting base 11 in the first direction X. The contact force between the face blade body 32 and the bottom blade body 13 has a component force parallel to the first direction X, or the contact force is parallel to the first direction X.

[0038] In actual use, when it is necessary to cut the packaging film, the face knife holder 31 can be moved so that the blade of the face knife body 32 contacts the bottom knife body 13, thereby cutting the packaging film located between the bottom knife assembly 10 and the face knife assembly 30 to form a single packaging film for subsequent packaging processes.

[0039] Specifically, when the face cutter body 32 contacts the bottom cutter body 13, if the position of either the face cutter body 32 or the bottom cutter body 13 is not properly adjusted, causing a collision, the bottom cutter holder 12 will move towards the mounting base 11 under the action of the contact force between the face cutter body 32 and the bottom cutter body 13, since the contact force between the face cutter body 32 and the bottom cutter body 13 is along the first direction X or has a component force in the first direction X. In this way, the movement of the bottom cutter holder 12 buffers the contact force between the face cutter body 32 and the bottom cutter body 13, thereby reducing wear between them and improving their service life.

[0040] In actual use, after the face knife holder 31 drives the face knife body 32 to contact the bottom knife body 13, the packaging film is cut once. Then the face knife holder 31 will drive the face knife body 32 away from the bottom knife body 13 so that the packaging film can move a certain distance. Then the face knife holder 31 will drive the face knife body 32 closer to the bottom knife body 13 again until the packaging film is cut. This process is repeated to cut a roll of packaging film into multiple individual packaging films.

[0041] To ensure effective contact between the face blade body 32 and the bottom blade body 13 during each cut of the packaging film, and to improve the absorption of impact forces between them, some embodiments of this application are described below. Figure 2 and Figure 3 The bottom cutter assembly 10 also includes an elastic element 14, which is disposed between the bottom cutter holder 12 and the mounting base 11. When the bottom cutter holder 12 approaches the mounting base 11, the elastic element 14 accumulates an elastic force to move the bottom cutter holder 12 away from the mounting base 11.

[0042] Thus, when the face blade body 32 contacts the bottom blade body 13, the contact force causes the bottom blade holder 12 to move closer to the mounting base 11, compressing the elastic element 14. The contact force is absorbed by the movement of the mounting base 11 and the compression of the elastic element 14, improving the absorption effect of the impact force between the face blade body 32 and the bottom blade body 13. Furthermore, after the packaging film is cut and the face blade holder 31 and face blade body 32 move away from the bottom blade body 13, the bottom blade holder 12 will move away from the mounting base 11 under the action of the elastic element 14, thereby restoring the position of the bottom blade body 13 and ensuring that the face blade body 32 can normally contact the bottom blade body 13 during the next round of packaging film cutting.

[0043] In some embodiments, the bottom cutter assembly 10 further includes an adjusting bolt 15. An adjusting hole is provided on the mounting base 11, extending along a first direction X. A mounting hole 17 is provided on the mounting base 11. The adjusting bolt 15 includes a bolt head 18 and a bolt shank. The bolt shank passes through the adjusting hole and is threadedly connected to the mounting hole 17. The bolt head 18 is located on the side of the mounting base 11 away from the bottom cutter seat 12, and the diameter of the bolt head 18 is larger than the diameter of the adjusting hole.

[0044] When the position of the bottom blade assembly 10 needs to be adjusted, the adjusting bolt 15 can be rotated to adjust the length of the bolt 15 rod inside the adjusting hole, thereby adjusting the position of the bottom blade holder 12 relative to the mounting base 11, which in turn adjusts the position of the bottom blade body 13 relative to the mounting base 11, ultimately achieving the effect of adjusting the position of the bottom blade body 13 relative to the face blade body 32. In actual use, the distance between the bottom blade body 13 and the face blade body 32 can be adjusted according to the film cutting effect and the degree of wear of the bottom blade body 13 and the face blade body 32 to ensure the cutting effect of the packaging film.

[0045] Furthermore, when the face cutter body 32 contacts the bottom cutter body 13, pushing the bottom cutter holder 12 to move, the bottom cutter holder 12 will drive the bolt rod of the adjusting bolt 15 to move within the adjusting hole, thereby allowing the adjusting bolt 15 to move along the first direction X with the bottom cutter holder 12. When the face cutter body 32 separates from the bottom cutter body 13, the elastic element 14 drives the bottom cutter holder 12 to move. After the bottom cutter holder 12 and the adjusting bolt 15 have moved a certain distance, the bolt head 18 will contact the mounting base 11, thereby preventing the bottom cutter holder 12 from continuing to move.

[0046] In this way, the movement of the bottom knife holder 12 is limited by the bolt head 18, which prevents the bottom knife holder 12 from moving too far under the action of the elastic element 14, causing the bottom knife holder 12 to detach from the mounting base 11. At the same time, the movement of the bottom knife holder 12 is limited by the bolt head 18, so that when the face knife body 32 is separated from the bottom knife body 13, the bottom knife holder 12 and the bottom knife body 13 on the bottom knife holder 12 can be reset to the same position, ensuring the cutting effect of each cutting of the packaging film.

[0047] In one specific embodiment, the elastic element 14 includes multiple spring washers 19. All the spring washers 19 are sleeved on the bolt rod and are located between the mounting base 11 and the bottom knife seat 12. Thus, all the spring washers 19 form a disc spring. The bolt rod limits and fixes the position of all the spring washers 19, eliminating the need for a separate mounting structure for the elastic element 14 and simplifying the structure.

[0048] It is understood that in some other embodiments, the elastic element 14 may also be a wire spring or a rubber spring or other existing spring type, which is not limited here.

[0049] In some embodiments of this application, in order to ensure the stability of the movement of the bottom knife holder 12 relative to the mounting base 11, the mounting base 11 includes a fixing part 20 and two limiting parts 21. One end of each limiting part 21 is disposed on the fixing part 20, and the other end extends longitudinally in a direction away from the fixing part 20. The two limiting parts 21 are spaced apart along the second direction Y. The bottom knife holder 12 is located between the two fixing parts 20. The second direction Y intersects with the first direction X.

[0050] Thus, by limiting the movement of the bottom cutter holder 12 relative to the fixed part 20 through the two limiting parts 21, the stability of the movement of the bottom cutter holder 12 is ensured, thereby ensuring the accuracy of the position of the bottom cutter body 13. Furthermore, in order to improve the limiting effect on the bottom cutter holder 12, the mounting base 11 includes two sets of limiting parts 21. Each set of limiting parts 21 includes two limiting parts 21 arranged along the second direction Y. The two sets of limiting parts 21 are arranged at intervals along the third direction Z, and the two limiting parts 21 are respectively located at both ends of the fixed part 20 in the third direction Z. Thus, by limiting both ends of the bottom cutter holder 12 through the two sets of limiting parts 21, the stability of the bottom cutter holder 12 is improved.

[0051] Specifically Figure 3 In this embodiment, the first direction X is the left-right direction, the second direction Y is the up-down direction, and the third direction Z is the front-back direction. Furthermore, the third direction Z is also the extension direction of the blade of the face knife body 32.

[0052] In some embodiments of this application, a portion of the bottom blade body 13 extends out of the mounting base 11, and the face blade body 32 can contact the portion of the bottom blade body 13 extending out of the mounting base 11. In actual use, the bottom blade body 13 and the face blade body 32 have the same thickness, and both blades are relatively thin. Therefore, the contact force between the face blade body 32 and the bottom blade body 13 will first cause the bottom blade body 13 to bend relative to the mounting base 11, absorbing the contact force through bending. If the contact force is large, it will be further absorbed through the movement of the aforementioned elastic element 14 and the mounting base 11. Thus, the contact force between the bottom blade body 13 and the face blade body 32 can be absorbed through multiple methods, effectively reducing tool wear and increasing the service life of both the bottom blade body 13 and the face blade body 32.

[0053] In some specific embodiments, the face knife holder 31 is rotatable about its own axis. The axis of the face knife holder 31 intersects the first direction X, and the axis of the face knife holder 31 is parallel to the extension direction of the blade of the face knife body 32. The end of the face knife body 32 with the blade extends along the tangential direction of the surface of the face knife holder 31. Thus, when the face knife holder 31 rotates, it will cause the blade of the face knife body 32 to move closer to or further away from the bottom knife body 13.

[0054] In this design, the surface of the bottom blade body 13 that contacts the top blade body 32 is inclined relative to the first direction X and is not perpendicular. Since the top blade body 32 moves closer to the bottom blade body 13 as the top blade holder 31 rotates, the blade of the top blade body 32 is also inclined when it contacts the bottom blade body 13. Setting the surface of the bottom blade body 13 to be inclined also helps to ensure that the blade of the top blade body 32 makes perpendicular contact with the surface of the bottom blade body 13, thereby improving the cutting effect on the packaging film.

[0055] In some embodiments of this application, the bottom knife assembly 10 further includes a bottom knife pressing block 22, which is fixedly disposed on the bottom knife seat 12 and presses the bottom knife body 13 onto the bottom knife seat 12. That is, the bottom knife body 13 is installed on the bottom knife seat 12 by pressing, so as to facilitate the adjustment of the position of the bottom knife body 13.

[0056] Specifically, the bottom cutter assembly 10 also includes a bottom cutter bolt (not shown in the figure). The bottom cutter pressing block 22 is provided with a bottom cutter pressing hole 23, and the bottom cutter holder 12 is provided with a bottom cutter fixing hole. The bottom cutter bolt passes through the bottom cutter pressing hole 23 and is threadedly connected to the bottom cutter fixing hole to install the bottom cutter pressing block 22 on the bottom cutter holder 12. One end of the bottom cutter body 13 is located between the bottom cutter pressing block 22 and the bottom cutter holder 12, and the other end extends out of the bottom cutter holder 12. When it is necessary to adjust the position of the bottom cutter body 13 relative to the bottom cutter holder 12, the bottom cutter bolt can be loosened first, and then the position of the bottom cutter body 13 can be adjusted before tightening the bottom cutter bolt to fix the bottom cutter body 13.

[0057] In some embodiments of this application, see [reference] Figure 4 and Figure 5 The noodle knife assembly 30 also includes a noodle knife pressing block 33, which is fixed to the noodle knife holder 31 and presses the noodle knife body 32 onto the noodle knife holder 31. That is, the noodle knife body 32 is installed on the noodle knife holder 31 by pressing, so as to adjust the position of the noodle knife body 32.

[0058] Specifically, the noodle cutter assembly 30 also includes a noodle cutter bolt 34. The noodle cutter pressing block 33 is provided with a noodle cutter pressing hole, and the noodle cutter holder 31 is provided with a noodle cutter fixing hole 35. The noodle cutter bolt 34 passes through the noodle cutter pressing hole and the noodle cutter fixing hole 35 and is threadedly connected to install the noodle cutter pressing block 33 on the noodle cutter holder 31. One end of the noodle cutter body 32 is located between the noodle cutter pressing block 33 and the noodle cutter holder 31, and the other end extends out of the noodle cutter holder 31. When it is necessary to adjust the position of the noodle cutter body 32 relative to the noodle cutter holder 31, the noodle cutter bolt 34 can be loosened first, and then the position of the noodle cutter body 32 can be adjusted before tightening the noodle cutter bolt 34 to fix the noodle cutter body 32.

[0059] This application also provides a tissue packaging machine, including a packaging film and a cutting structure as described in any of the above embodiments. The packaging film passes through a film channel formed between the bottom knife assembly 10 and the front knife assembly 30, and is cut by the cutting structure to form a single piece of packaging film for subsequent packaging processes.

[0060] The above-described cutting structure has at least the following advantages:

[0061] When the face cutter body 32 contacts the bottom cutter body 13, if the position of the face cutter body 32 or the bottom cutter body 13 is not properly adjusted, causing a collision between them, the bottom cutter holder 12 will move towards the mounting base 11 under the action of the contact force between the face cutter body 32 and the bottom cutter body 13, since the contact force between them is along the first direction X or has a component force in the first direction X. In this way, the movement of the bottom cutter holder 12 buffers the contact force between the face cutter body 32 and the bottom cutter body 13, thereby reducing wear between them and improving their service life.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A cutter structure, characterized by, The cutter structure comprises: a bottom cutter assembly (10) comprising a mounting base (11), a bottom cutter base (12) configured to move towards or away from the mounting base (11) along a first direction (X) under an external force, and a bottom cutter body (13) arranged on a side of the bottom cutter base (12) away from the mounting base (11) along the first direction (X); a surface cutter assembly (30) comprising a surface cutter base (31) movable relative to the mounting base (11) and a surface cutter body (32) arranged on the surface cutter base (31), wherein during movement of the surface cutter base (31), a cutting edge of the surface cutter body (32) is capable of contacting the bottom cutter body (13) on a side of the bottom cutter body (13) away from the mounting base (11) along the first direction (X), and a contact force between the surface cutter body (32) and the bottom cutter body (13) has a component parallel to the first direction (X), or the contact force is parallel to the first direction (X).

2. The cutter structure of claim 1 wherein, The bottom cutter assembly (10) further comprises an elastic member (14) arranged between the bottom cutter base (12) and the mounting base (11), and when the bottom cutter base (12) moves towards the mounting base (11), the elastic member (14) accumulates an elastic force for moving the bottom cutter base (12) away from the mounting base (11).

3. The cutter structure of claim 2 wherein, The bottom cutter assembly (10) further comprises an adjusting bolt (15), and the mounting base (11) is provided with an adjusting hole extending along the first direction (X) and an installation hole (17). The adjusting bolt (15) comprises a bolt head (18) and a bolt rod, the bolt rod is arranged in the adjusting hole and is threadedly connected with the installation hole (17), and the bolt head (18) is located on a side of the mounting base (11) away from the bottom cutter base (12), and a diameter of the bolt head (18) is greater than a diameter of the adjusting hole.

4. The cutter structure of claim 3 wherein, The elastic member (14) comprises a plurality of spring washers (19), and all the spring washers (19) are sleeved on the bolt rod.

5. The cutter structure of claim 1 wherein, The mounting base (11) comprises a fixed portion (20) and two limiting portions (21), one end of each limiting portion (21) is arranged on the fixed portion (20), and the other end extends longitudinally away from the fixed portion (20), the two limiting portions (21) are arranged in a second direction (Y) and are spaced apart, the bottom cutter base (12) is located between the two fixed portions (20), and the second direction (Y) intersects the first direction (X).

6. The cutter structure of claim 1 wherein, Part of the bottom cutter body (13) extends out of the mounting base (11), and the surface cutter body (32) is capable of contacting the part of the bottom cutter body (13) extending out of the mounting base (11).

7. The cutter structure of claim 1 wherein, The face knife seat (31) is rotatable around its own axis, the axis of the face knife seat (31) intersects the first direction (X), and the axis of the face knife seat (31) is parallel to the extension direction of the blade of the face knife body (32), one end of the face knife body (32) with the blade extends along the tangent direction of the surface of the face knife seat (31); The bottom knife body (13) is inclined to the first direction (X) and is not perpendicular to the surface of the bottom knife body (13) in contact.

8. The cutter structure of claim 1 wherein, The bottom knife assembly (10) further comprises a bottom knife pressing block (22), the bottom knife pressing block (22) is arranged on the bottom knife seat (12), and the bottom knife pressing block (22) presses the bottom knife body (13) on the bottom knife seat (12).

9. The cutter structure of claim 1 wherein, The face knife assembly (30) further comprises a face knife pressing block (33), the face knife pressing block (33) is arranged on the face knife seat (31), and the face knife pressing block (33) presses the face knife body (32) on the face knife seat (31).

10. A tissue packaging machine characterized by, The cutting knife structure comprises a packaging film and the bottom knife assembly (10) and the face knife assembly (30), a film channel is formed between the bottom knife assembly (10) and the face knife assembly (30), and the packaging film passes through the film channel.

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