Diaphragm cutting and slicing mechanism

By designing a diaphragm cutting mechanism including multiple components, the problem of low automatic cutting efficiency and accuracy of glass fiber diaphragm in the prior art is solved, and an efficient and stable automatic cutting production process is achieved.

CN222987090UActive Publication Date: 2025-06-17GUANGDONG GONGPU INTELLIGENT EQUIPMENT CO LTD
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Patent Information

Application Number
CN202422189143.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-06
Publication Date
2025-06-17
Estimated Expiration
2034-09-06

AI Technical Summary

Technical Problem

The prior art is difficult to achieve efficient automatic cutting of glass fiber diaphragms, resulting in low efficiency and accuracy, and requires a lot of manual intervention.

Method used

A diaphragm cutting mechanism is designed, including a rack, feeding seat, sheet material discharging table, guide assembly, slice device, clamp device, roll moving drive device and rolling deviation correction sensor. Through the coordinated work of these components, the automatic cutting of the rolled diaphragm is realized.

Benefits of technology

It improves the efficiency and accuracy of coiled diaphragm slices, reduces manual intervention, and has a high degree of automation, achieving an efficient and stable diaphragm cutting into slice production process.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a mechanism for cutting a diaphragm into sheets. Comprising a rack, a feeding seat, a sheet material placing table for placing a sheet-shaped diaphragm, a guide assembly for guiding a roll-shaped diaphragm, a slicing device for cutting the roll-shaped diaphragm into the sheet-shaped diaphragm, a material clamping device for clamping the roll-shaped diaphragm, a roll material movement driving device for driving the roll-shaped diaphragm to move, and an unwinding deviation correction sensor, the feeding base is transversely and fixedly arranged on a workbench of the rack, the feeding end of the sheet placing table is in butt joint with the discharging end of the feeding base through a guide assembly, and the roll material moving driving device is arranged in the feeding base in the mounting direction of the feeding base. The material clamping device is in transmission connection with the output portion of the roll material moving driving device and is driven by the roll material moving device to move back and forth on the feeding base, and the slicing device is arranged at the end of the inner side of the feeding end of the sheet discharging table. The diaphragm slicing device can reduce manual intervention, is high in automation degree, and can realize efficient and stable diaphragm slicing operation.
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Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm cutting mechanisms, and more specifically to a diaphragm cutting mechanism. Background Art

[0002] Glass fiber separator is a separator material used in lithium-ion batteries, mainly made of glass fiber. It isolates the positive and negative electrodes in the battery and avoids short circuits, while allowing lithium ions to pass freely during the battery charging and discharging process. Due to the material properties of glass fiber separators that are not easily stressed, relatively brittle, and fragile, they cannot be Z-shaped coated on the positive and negative electrodes, so they need to be cut into sheets and then stacked. Therefore, a separator cutting mechanism that can efficiently, automatically, and stably cut the glass fiber separator into sheets is needed. Utility Model Content

[0003] The utility model aims to overcome the above-mentioned defects in the prior art and provide a diaphragm cutting mechanism which can reduce manual intervention, has a high degree of automation and improves the efficiency and precision of slicing rolled diaphragms.

[0004] To achieve the above-mentioned purpose, the utility model provides a membrane cutting into sheets mechanism, including a frame, a feeding seat, a sheet material unloading table for stacking the sliced ​​sheet membranes, a guide assembly for guiding the rolled membrane, a slicing device for cutting the rolled membrane into sheet membranes, a clamping device for clamping the rolled membrane, a roll material moving drive device for driving the rolled membrane to move, and an unwinding correction sensor. The feeding seat is laterally fixed on the workbench of the frame, and the feeding end of the sheet material unloading table is connected to the outlet of the feeding seat. The material ends are connected to each other through guide components, and the coil material moving drive device is arranged inside the feeding seat along the installation direction of the feeding seat. The clamping device is transmission-connected with the output part of the coil material moving drive device and is driven to move back and forth on the feeding seat through the coil material moving device. The slicing device is arranged at the inner end of the feeding end of the sheet material unwinding table, and the unwinding correction sensor is fixedly arranged on the workbench and located on one side of the feeding end of the feeding seat. The top surface of the sheet material unwinding table is fixedly provided with a limiting component for limiting the sheet diaphragm.

[0005] Preferably, the feeding seat includes two material guide side seats, two baffles and two bending baffle bars. The two material guide side seats are arranged relatively vertically and parallel on the workbench. The two baffles are fixedly connected to the front and rear ends of the two material guide side seats, and the two bending baffle bars are fixedly connected to one side of the top end of the two material guide side seats along the length direction of the material guide side seats.

[0006] Preferably, the coil material moving driving device includes a slide rail, a slider, a screw rod, a nut sleeve, a rotating bearing seat, and a rotating driving motor. There are two slide rails, which are respectively fixedly arranged on the top surfaces of the two material guiding side seats along the length directions of the two material guiding side seats. The bottom of the material clamping device is slidably connected to the corresponding slide rail through two sliders. There are two rotating bearing seats, which are respectively arranged parallel to the two baffles and vertically located between the two material guiding side seats. One end of the screw rod is rotatably connected to one of the rotating bearing seats, and the other end of the screw rod passes through the other rotating bearing seat and is in transmission connection with the rotating driving motor fixedly arranged at the bottom of the workbench through a transmission component. The nut sleeve is sleeved on the screw rod and is in threaded connection with it. The bottom of the material clamping device is fixedly connected to the nut sleeve through a connecting block. The rotating driving motor can drive the screw rod to rotate, so as to drive the material clamping device connected to the nut sleeve to slide back and forth on the slide rail.

[0007] Preferably, the material clamping device includes a material clamping seat, a material clamping plate, a material clamping lifting cylinder, a positioning guide post, and a positioning guide sleeve. The material clamping seat is arranged in a rectangular structure with openings at both front and rear ends. There are two material clamping lifting cylinders, which are respectively fixedly arranged on the top surface of the material clamping seat. The output shaft of the material clamping lifting cylinder passes through the top surface of the material clamping seat and is in transmission connection with the material clamping plate to drive it to move up and down. One end of the positioning guide post passes through the positioning guide sleeve inserted downward on the top surface of the material clamping seat and is fixedly connected to the top surface of the material clamping plate.

[0008] Preferably, the slicing device includes a vertical plate, a cutting knife, an abutting plate, an abutting cylinder, and a cutting knife lifting cylinder. The back surface of the vertical plate is vertically fixed at the end of the feeding end of the sheet material feeding table. A through hole for the coiled diaphragm to pass through is opened on the vertical plate. The abutting cylinder is fixedly installed on the front surface of the vertical plate and is located below the through hole. One side of the abutting plate is movably arranged in the through hole along the length direction of the through hole, and the other side bottom of the abutting plate is in transmission connection with the output shaft of the abutting cylinder. The cutting knife is fixedly arranged on the back surface of the vertical plate along the length direction of the through hole and is located at the opening position of the through hole. The cutting knife lifting cylinder is fixed on the workbench and its output shaft is in transmission connection with one side of the cutting knife to drive the cutting knife to move up and down.

[0009] Preferably, the guiding component includes a support plate, a support frame, and a guiding plate. The support plate is horizontally fixedly arranged above the discharging end of the feeding seat through two support frames and can be abutted against one end of the abutting plate. The guiding plate is arranged in an L shape and is fixedly arranged on the top of the front surface of the vertical plate along the length of the through hole. The horizontal plane edge of the guiding plate is inclined from top to bottom to form a first inclined guiding surface facing the through hole.

[0010] Preferably, the limiting component includes two side retaining bars and a limiting block. The two side retaining bars are respectively installed on both sides of the top surface of the sheet feeding table relatively through their respective locking screws. The inner sides of the ends of the two side retaining bars close to the cutting knife are relatively arranged as second inclined guide surfaces inclined outward. The limiting block is installed on the top surface of the sheet feeding table at the end far from the cutting knife through a locking screw. A plurality of threaded holes for adjusting the positions of the two side retaining bars and the limiting block are provided on the top surface of the sheet feeding table.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] The structure of the present utility model is simple and reasonably designed. The coiled diaphragm is clamped by the clamping device, and then the clamping device is driven by the coiled material moving driving device to move forward to the guiding component and the cutting knife device, so that the coiled diaphragm with the required length is placed on the sheet feeding table. The slicing device drives the cutting knife to cut the coiled diaphragm into sheet-shaped diaphragms. The present utility model improves the efficiency and accuracy of slicing the coiled diaphragm, reduces manual intervention, has a high degree of automation, and through the collaborative work of each device component, can realize an efficient and stable production process of slicing the diaphragm into sheets. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 is a schematic structural diagram of a diaphragm slicing mechanism provided by an embodiment of the present utility model Figure 1 ;

[0015] Figure 2 is a schematic structural diagram of a diaphragm slicing mechanism provided by an embodiment of the present utility model Figure 2 ;

[0016] Figure 3 is a partial structural schematic diagram of a diaphragm slicing mechanism provided by an embodiment of the present utility model;

[0017] Figure 4 is a schematic structural diagram of a clamping device of a diaphragm slicing mechanism provided by an embodiment of the present utility model;

[0018] Figure 5 is a partially enlarged schematic structural diagram of a diaphragm slicing mechanism provided by an embodiment of the present utility model;

[0019] Figure 6 It is a working schematic diagram of a membrane cutting-into-sheets mechanism provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Please refer to Figure 1 The embodiment of the utility model provides a membrane cutting mechanism, including a frame 1, a feeding seat 2, a sheet material unloading table 3 for stacking sliced ​​sheet membranes, a guide assembly 4 for guiding a roll membrane, a slicing device 5 for cutting a roll membrane into sheet membranes, a clamping device 6 for clamping a roll membrane, a roll material moving drive device 7 for driving the roll membrane to move, a roll unwinding correction sensor 8 and other components. The following is a detailed description of each component of this embodiment in conjunction with the accompanying drawings.

[0022] like Figure 1 and Figure 2 As shown, the feeding seat 2 can be fixedly arranged horizontally on the workbench 11 of the frame 1, the feeding end of the sheet unloading table 3 is connected to the discharging end of the feeding seat 2 through the guide component 4, the coil moving drive device 7 is arranged inside the feeding seat 2 along the installation direction of the feeding seat 2, the clamping device 6 is transmission connected with the output part of the coil moving drive device 7 and is driven to move back and forth on the feeding seat 2 through the coil moving device, the slicing device 5 is arranged at the inner end of the feeding end of the sheet unloading table 3, the unwinding correction sensor 8 is fixedly arranged on the workbench 11 and is located on one side of the feeding end of the feeding seat 2, and the top surface of the sheet unloading table 3 is fixedly provided with a limiting component 9 for limiting the sheet diaphragm.

[0023] Among them, the unwinding correction sensor 8 can adopt the common unwinding correction sensor on the market, and this embodiment does not impose any restrictions, so as to achieve real-time monitoring of the deviation of the rolled diaphragm. When the rolled diaphragm is deflected, the operator manually turns the correction adjustment knob to drive the U-shaped opening of the correction adjustment plate to move back and forth, so as to fine-tune one side of the rolled diaphragm located between the U-shaped opening grooves, thereby improving the position accuracy of the diaphragm entering the feeding seat 2 and ensuring that it does not deviate from the predetermined trajectory during the feeding process.

[0024] like Figure 3As shown, the feeding seat 2 may include two material guiding side seats 21, two baffles 22 and two bending baffle bars 23. The two material guiding side seats 21 are relatively vertically and parallelly arranged on the workbench 11, the two baffles 22 are respectively fixedly connected to the front and rear ends of the two material guiding side seats 21, and the two bending baffle bars 23 are respectively fixedly connected to the top side of the two material guiding side seats 21 along the length direction of the material guiding side seats 21.

[0025] Specifically, the coil moving drive device 7 may include a slide rail 71, a slider 72, a screw 73, a nut sleeve 74, a rotating bearing seat 75, and a rotating drive motor 76. The slide rail 71 is provided with two and is respectively fixedly arranged on the top surface of the two material guide side seats 21 along the length direction of the two material guide side seats 21. The bottom of the clamping device 6 is slidably connected to the respective corresponding slide rails 71 through two sliders 72. The rotating bearing seat 75 is provided with two and is respectively arranged parallel to the two baffles 22 and vertically located between the two material guide side seats 21. One end of the screw 73 The screw rod 73 is rotationally connected to one of the rotating bearing seats 75. The other end of the screw rod 73 passes through another rotating bearing seat 75 and is transmission-connected to the rotating drive motor 76 fixedly arranged at the bottom of the workbench 11 through the transmission assembly (driving wheel + driven wheel + synchronous belt). The nut sleeve 74 is sleeved on the screw rod 73 and threadedly connected thereto. The bottom of the clamping device 6 is fixedly connected to the nut sleeve 74 through the connecting block 77. The rotating drive motor 76 can drive the screw rod 73 to rotate, thereby driving the clamping device 6 connected to the nut sleeve 74 to slide back and forth on the slide rail 71. Among them, the coil moving drive device 7 is used to drive the roll diaphragm to move, ensuring its continuity and stability during the cutting and feeding process. It has high operating accuracy and is stable and reliable.

[0026] like Figure 4 As shown, the material clamping device 6 may include a material clamping seat 61, a material clamping plate 62, a material clamping lifting cylinder 63, a positioning guide column 64 and a positioning guide sleeve 65. The material clamping seat 61 is arranged as a rectangular structure with openings at both ends. Two material clamping lifting cylinders 63 are provided and are respectively fixedly arranged on the top surface of the material clamping seat 61. The output shaft of the material clamping lifting cylinder 63 passes through the top surface of the material clamping seat 61 and is transmission-connected with the material clamping plate 62 and drives it to move up and down. One end of the positioning guide column 64 passes through the positioning guide sleeve 65 inserted downward on the top surface of the material clamping seat 61 and is fixedly connected to the top surface of the material clamping plate 62. The bottom surface of the material clamping seat 61 is fixedly connected to the nut sleeve 74 through a connecting block 77.

[0027] like Figure 5As shown in the figure, in this embodiment, the slicing device 5 may include a vertical plate 51, a cutting knife 52, a contact plate 53, a contact cylinder 54, and a cutting knife lifting cylinder 55. The back surface of the vertical plate 51 is vertically fixed to the feeding end of the sheet feeding table 3. A through hole 50 for the coiled diaphragm to pass through is provided on the vertical plate 51. The contact cylinder 54 is fixedly installed on the front surface of the vertical plate 51 and is located below the through hole 50. One side of the contact plate 53 is movably arranged in the through hole 50 along the length direction of the through hole 50, and the bottom of the other side of the contact plate 53 is in transmission connection with the output shaft of the contact cylinder 54. The cutting knife 52 is fixedly arranged upward along the length direction of the through hole 50 on the back surface of the vertical plate 51 and is located at the opening position of the through hole 50. The cutting knife lifting cylinder 55 is fixed on the workbench, and its output shaft is in transmission connection with one side of the cutting knife 52 and drives the cutting knife 52 to move up and down.

[0028] Preferably, the guiding assembly 4 may include a support plate 41, a support frame 42, and a guiding plate 43. The support plate 41 is horizontally fixed above the discharging end of the feeding seat 2 through two support frames 42 and can be docked with one end of the contact plate 53. The guiding plate 43 is arranged in an L shape and is fixedly arranged along the length of the through hole 50 at the top of the front surface of the vertical plate 51. The horizontal plane edge of the guiding plate 43 is inclined from top to bottom to form a first inclined guiding surface 431 facing the through hole 50.

[0029] Furthermore, the limiting assembly 9 may include two side blocking strips 91 and a limiting block 92. The two side blocking strips 91 are respectively installed on both sides of the top surface of the sheet feeding table 3 relative to each other through their respective locking screws. The inner sides of the ends of the two side blocking strips 91 close to the cutting knife 52 are relatively arranged as second inclined guiding surfaces 911 inclined outward. The limiting block 92 is installed on the top surface of the sheet feeding table 3 at the end far from the cutting knife 52 through a locking screw. A plurality of threaded holes 32 for position adjustment of the two side blocking strips 91 and the limiting block 92 are provided on the top surface of the sheet feeding table 3.

[0030] Among them, the limiting assembly 9 is used to limit the sheet-shaped diaphragm to ensure that the cut sheet-shaped diaphragm remains stable on the sheet feeding table 3 and avoid falling or being stacked unevenly. In addition, by adjusting the relative positions of the two side blocking strips 91 and the limiting block 92, the sizes of different sheets can be adapted, and the applicable range is wide.

[0031] The working principle of the present utility model is as follows:

[0032] As Figure 6As shown in the figure, first, one end of the roll-shaped diaphragm 10 is horizontally passed through the unwinding deviation rectifying sensor and through the opening part of the clamping device on the feeding seat. The clamping plate is driven by the clamping lifting cylinder to clamp the roll-shaped diaphragm. The roll material moving driving device drives the clamping device to move forward to the guiding assembly. The support plate and the guiding plate support and guide the roll-shaped diaphragm so that it can smoothly enter the through hole of the slicing device and place the roll-shaped diaphragm of the required length on the sheet material feeding table. The abutting plate of the slicing device moves upward through the abutting cylinder to clamp the roll-shaped diaphragm. At the same time, the cutter lifting cylinder drives the cutter to move upward to cut the roll-shaped diaphragm. The diaphragm located on the sheet material feeding table is the sheet-shaped diaphragm 11. By repeating the above process, after multiple sheet-shaped diaphragms are stacked on the sheet material feeding table, finally, the stacked sheets are collected.

[0033] In summary, the utility model improves the efficiency and precision of slicing the roll-shaped diaphragm, reduces manual intervention, and has a high degree of automation. Through the collaborative work of each device component, an efficient and stable production process of diaphragm slicing can be realized.

[0034] The above embodiments are the preferred embodiments of the utility model, but the embodiments of the utility model are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the utility model shall be equivalent replacement methods and shall be included in the protection scope of the utility model.

Claims

1. A membrane cutting mechanism, characterized in that: The invention comprises a frame (1), a feeding seat (2), a sheet material unloading platform (3) for stacking sliced ​​sheet diaphragms, a guide assembly (4) for guiding the rolled diaphragms, a slicing device (5) for cutting the rolled diaphragms into sheet diaphragms, a clamping device (6) for clamping the rolled diaphragms, a roll material moving driving device (7) for driving the rolled diaphragms to move, and an unwinding deviation correction sensor (8). The feeding seat (2) is transversely fixedly arranged on a workbench (11) of the frame (1), and the feeding end of the sheet material unloading platform (3) is connected to the discharging end of the feeding seat (2) via the guide assembly (4). The coil moving drive device (7) is arranged inside the feeding seat (2) along the installation direction of the feeding seat (2); the clamping device (6) is transmission-connected with the output part of the coil moving drive device (7) and is driven to move back and forth on the feeding seat (2) through the coil moving device; the slicing device (5) is arranged at the inner end of the feeding end of the sheet material unloading platform (3); the unwinding correction sensor (8) is fixedly arranged on the workbench (11) and is located on one side of the feeding end of the feeding seat (2); and a limiting component (9) for limiting the sheet diaphragm is fixedly arranged on the top surface of the sheet material unloading platform (3).

2. A membrane cutting mechanism according to claim 1, characterized in that: The feeding seat (2) comprises two material guiding side seats (21), two baffles (22) and two bent baffles (23); the two material guiding side seats (21) are relatively vertically and parallelly arranged on the workbench (11); the two baffles (22) are respectively fixedly connected to the front and rear ends of the two material guiding side seats (21); and the two bent baffles (23) are respectively fixedly connected to one side of the top end of the two material guiding side seats (21) along the length direction of the material guiding side seats (21).

3. A membrane cutting mechanism according to claim 2, characterized in that: The coil moving drive device (7) comprises a slide rail (71), a slider (72), a screw (73), a nut sleeve (74), a rotating bearing seat (75), and a rotating drive motor (76). The slide rail (71) is provided with two and is respectively fixedly arranged on the top surface of the two material guide side seats (21) along the length direction of the two material guide side seats (21). The bottom of the clamping device (6) is slidably connected to the corresponding slide rails (71) through two sliders (72). The rotating bearing seat (75) is provided with two and is respectively arranged parallel to the two baffles (22) and vertically located between the two material guide side seats (21). The screw ( One end of the screw rod (73) is rotationally connected to one of the rotating bearing seats (75), the other end of the screw rod (73) passes through the other rotating bearing seat (75) and is transmission-connected to a rotating drive motor (76) fixedly arranged at the bottom of the workbench (11) through a transmission assembly, the nut sleeve (74) is sleeved on the screw rod (73) and threadedly connected thereto, the bottom of the clamping device (6) is fixedly connected to the nut sleeve (74) through a connecting block (77), and the rotating drive motor (76) can drive the screw rod (73) to rotate, thereby driving the clamping device (6) connected to the nut sleeve (74) to slide back and forth on the slide rail (71).

4. A membrane cutting into slices mechanism according to claim 3, characterized in that: The material clamping device (6) comprises a material clamping seat (61), a material clamping plate (62), a material clamping lifting cylinder (63), a positioning guide column (64) and a positioning guide sleeve (65). The material clamping seat (61) is arranged as a rectangular structure with openings at both ends. Two material clamping lifting cylinders (63) are provided and are respectively fixedly arranged on the top surface of the material clamping seat (61). The output shaft of the material clamping lifting cylinder (63) passes through the top surface of the material clamping seat (61) and is transmission-connected with the material clamping plate (62) to drive the clamping plate to move up and down. One end of the positioning guide column (64) passes through the positioning guide sleeve (65) inserted downward on the top surface of the material clamping seat (61) and is fixedly connected to the top surface of the material clamping plate (62). The bottom surface of the material clamping seat (61) is fixedly connected to the nut sleeve (74) via a connecting block (77).

5. The membrane cutting mechanism according to claim 1, characterized in that: The slicing device (5) comprises a vertical plate (51), a cutter (52), an abutting plate (53), an abutting cylinder (54), and a cutter lifting cylinder (55). The back side of the vertical plate (51) is vertically fixed to the feeding end of the sheet material unloading platform (3). The vertical plate (51) is provided with a through hole (50) for the roll-shaped diaphragm to pass through. The abutting cylinder (54) is fixedly mounted on the front side of the vertical plate (51) and is located below the through hole (50). One side of the abutting plate (53) is along the The through hole (50) is movably arranged in the through hole (50) in the length direction thereof; the bottom of the other side of the abutting plate (53) is drivingly connected to the output shaft of the abutting cylinder (54); the cutter (52) is fixedly arranged on the back side of the vertical plate (51) upward along the length direction of the through hole (50) and is located at the opening position of the through hole (50); the cutter lifting cylinder (55) is fixed on the workbench and its output shaft is drivingly connected to one side of the cutter (52) and drives the cutter (52) to move up and down.

6. A membrane cutting mechanism according to claim 5, characterized in that: The guide assembly (4) comprises a support plate (41), a support frame (42) and a guide plate (43); the support plate (41) is transversely fixedly arranged above the discharge end of the feeding seat (2) through two support frames (42) and is capable of butting against one end of the abutment plate (53); the guide plate (43) is arranged in an L-shape and is fixedly arranged on the front top of the vertical plate (51) along the length of the through hole (50); the horizontal surface edge of the guide plate (43) is inclined from top to bottom to form a first inclined guide surface (431) facing the through hole (50).

7. A membrane cutting into slices mechanism according to claim 6, characterized in that: The limit stop assembly (9) comprises two side baffles (91) and a limit stop block (92); the two side baffles (91) are respectively mounted on both sides of the top surface of the sheet material discharging platform (3) by respective locking screws; the inner side surfaces of one end of the two side baffles (91) close to the cutter (52) are relatively arranged as a second inclined guide surface (911) inclined outward; the limit stop block (92) is mounted on the top surface of the sheet material discharging platform (3) away from the cutter (52) by locking screws; and a plurality of threaded holes (32) are respectively provided on the top surface of the sheet material discharging platform (3) for adjusting the positions of the two side baffles (91) and the limit stop block (92).