Cutting device for paper bag machine

Abstract

The utility model relates to the technical field of paper bag production, in particular to a cutting device for a paper bag machine, which comprises a mounting plate, a power mechanism, a mounting seat and the like. The front part and the rear part of the upper surface of the mounting plate are respectively connected with a power mechanism; and the two power mechanisms are respectively connected with a mounting seat. The electric sliding block drives the first conveying roller and the paper bags on the surface of the first conveying roller to gradually move backwards by an increased distance, so that the paper bags conveyed to the first conveying roller by the front conveying mechanism are continuously kept in a tightened state and cannot be loosened or stacked between the first conveying roller and the second conveying roller, and after the paper bags are cut, the paper bags are cut. When the paper bag is cut, the second conveying roller quickly conveys the extended paper bag backwards, and the first conveying roller returns to the original position, so that the paper bag is continuously cut under the non-stop state, and the overall working efficiency is not affected while the product quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of paper bag production technology, and more specifically, to a cutting device for paper bag machines. Background Technology

[0002] Under current technological conditions, some paper bag machines, especially during the cutting operation, have to periodically stop and start to adjust in order to ensure that each paper bag is the same size and achieves good cutting quality, because the paper bags are continuously fed in. While this method ensures product quality, it results in relatively low overall work efficiency.

[0003] In addition, the cutter generates debris when cutting paper bags. When this debris accumulates inside the machine to a certain extent, it will directly affect the normal operation of the paper bag machine (for example, excessive debris may block the transmission channel or wear down the blades, leading to frequent machine downtime for maintenance). Furthermore, debris that is not cleaned in time can easily adhere to the surface of freshly cut paper bags, causing uneven product surfaces or residual impurities, directly affecting the appearance and performance of the paper bags. These problems not only reduce production efficiency but also increase the cost of manual cleaning and quality rework, posing significant challenges to the continuity of the production process and the product qualification rate. Utility Model Content

[0004] The purpose of this invention is to overcome the disadvantage that machines have to be periodically stopped and started for adjustment. Although this method ensures product quality, it leads to relatively low overall work efficiency. The invention provides a cutting device that can continuously cut paper bags without stopping the machine and can also remove the debris generated during the cutting of paper bags.

[0005] Another objective of this invention is to provide a cutting device for a paper bag machine that has the above-mentioned functions.

[0006] The embodiments of this utility model are achieved through the following technical solutions: a cutting device for a paper bag machine, comprising a mounting plate, a power mechanism, a mounting base, a first conveyor roller, and a first servo motor; a power mechanism is connected to the front of the upper surface and the rear of the upper surface of the mounting plate; a mounting base is connected to each of the two power mechanisms; a first conveyor roller is rotatably connected to both mounting bases; a first servo motor is fixedly connected to the right mounting base, and the output shaft of the first servo motor is fixedly connected to the first conveyor roller; it also includes a mounting bracket, a circular cover, a second conveyor roller, a second servo motor, a pressing mechanism, a receiving plate, and a cutting mechanism; a power mechanism is connected to the front of the upper surface and the rear of the upper surface of the mounting plate, a second power mechanism, a mounting base, a first conveyor roller, and a first servo motor ... servo motor, a first servo motor, a second power mechanism, a second pressing mechanism, a receiving plate, and a cutting mechanism; a power mechanism is connected to the front of the upper surface and the rear of the upper surface of the mounting plate, a second power mechanism, a second servo motor, a second pressing mechanism, a second receiving plate, and a cutting mechanism; a power mechanism is connected to the front of the upper surface and the rear of the upper surface of the mounting plate, a second power mechanism, a second power mechanism, a second servo motor, a second pressing mechanism, a second pressing mechanism, a second receiving plate, and a cutting mechanism; a power mechanism is connected to the front of the upper surface and the rear of the upper surface of the mounting plate, a second power mechanism, a second power mechanism, a second power mechanism, a second pressing mechanism, a second pressing mechanism, a second pressing mechanism, a second pressing mechanism, a There is a mounting bracket; a circular cover is fixedly connected to both mounting brackets; a strip groove is opened at the front and rear of the circular cover; a second conveyor roller is rotatably connected inside the circular cover; a second servo motor is fixedly connected to the right side of the circular cover, and the output shaft of the second servo motor is fixedly connected to the second conveyor roller; a pressing mechanism for pressing down the paper bag is connected inside the circular cover, and the pressing mechanism is located above the second conveyor roller; a receiving plate is fixedly connected to the rear of the circular cover, and the receiving plate is located in the rear strip groove; a cutting mechanism for cutting the paper bag is connected inside the circular cover; a power mechanism is used to drive the mounting base, the first conveyor roller, and the first servo motor to move.

[0007] As a further preferred embodiment, the power mechanism includes an electric slide rail and an electric slider; the electric slide rail is fixedly connected to the front of the upper surface of the mounting plate, and the electric slide rail is located in the front mounting bracket; the electric slider is slidably connected to the electric slide rail; the electric slider is fixedly connected to the front mounting base.

[0008] As a further preferred embodiment, the clamping mechanism includes a spring telescopic column, a fixed block, and a round rod; two spring telescopic columns are fixedly connected to the upper part of the inner ring surface of the circular cover; a fixed block is fixedly connected to the telescopic end of each of the two spring telescopic columns; a round rod is rotatably connected to the two fixed blocks, and the round rod is in contact with the conveying roller.

[0009] As a further preferred embodiment, the cutting mechanism includes a circular ring, a gear ring, a circular shaft, a servo motor, a spur gear, and an arc-shaped cutter; a circular ring is rotatably connected to the left and right sides of the inner ring surface of the circular housing; a gear ring is fixedly connected to the inner side of each circular ring; a circular shaft is rotatably connected to the right side of the circular housing; a servo motor is fixedly connected to the right side of the circular housing, and the servo motor is located below the second servo motor; the output shaft of the third servo motor is fixedly connected to the circular shaft; a spur gear is fixedly connected to the circular shaft, and the spur gear meshes with the gear ring; an arc-shaped cutter is fixedly connected between the two circular rings, and the arc-shaped cutter is located between the first circular rod and the receiving plate; a cutting groove adapted to the cutting edge of the arc-shaped cutter is provided on the receiving plate.

[0010] As a further preferred embodiment, it also includes two spring telescopic columns 2 fixedly connected to the inner arc surface of the arc-shaped cutter; each of the telescopic ends of the two spring telescopic columns 2 is fixedly connected to a fixing block 2, and the receiving plate is located between the two fixing blocks 2; a round rod 2 is fixedly connected to both fixing blocks 2.

[0011] As a further preferred option, the upper and lower sides of the front strip groove are provided with arc-shaped surfaces.

[0012] As a further preferred embodiment, it also includes a guide block fixed to the right side of the inner annular surface of the circular cover, and the guide block is rotatably connected to the second conveyor roller; the guide block is located between the receiving plate and the right annular ring; the guide block is provided with a clearance groove to avoid the movement range of the arc-shaped cutter; the second conveyor roller is hollow, and the left side of the second conveyor roller is provided with a number of circular holes arranged in a ring array; the rear end of the second conveyor roller is rotatably connected to a joint; the left side of the circular cover is provided with a number of circular holes arranged in a ring array; the inner arc surface of the guide block has a frustum portion.

[0013] This utility model has the following advantages:

[0014] The paper bag cutting device for paper bag machines, as designed above, uses an electric slider to gradually move the conveyor roller one and the paper bag on its surface backward. This increases the distance, ensuring that the paper bag being conveyed from the front conveyor mechanism to the conveyor roller one remains taut and does not sag or pile up between the conveyor roller one and the conveyor roller two. After the paper bag is cut, the conveyor roller two quickly conveys the extended paper bag backward, allowing the conveyor roller one to return to its original position. This allows for continuous paper bag cutting without stopping the machine, ensuring product quality without affecting overall work efficiency.

[0015] The paper bag cutting device for paper bag making obtained by the above design can cut the paper bag with an arc-shaped cutter during the process of the round rod pressing the paper bag. This can prevent the paper bag from shifting during cutting, which would affect the cutting quality of the paper bag. In addition, the arc-shaped cutter can be supported by the cutting groove, which can reduce the wear of the arc-shaped cutter and extend its service life.

[0016] The paper bag cutting device designed in this invention uses a continuous airflow to carry away the debris generated during cutting, preventing the debris from accumulating inside the machine and affecting the normal operation of the device. It also prevents the debris from affecting the appearance and performance of the paper bags, and eliminates the need for manual cleaning, thus reducing the workload. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0018] Figure 1 This is a three-dimensional structural diagram of the cutting device for a paper bag machine according to this utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the circular cover, conveying roller 2, servo motor 2, pressing mechanism and receiving plate of the cutting device for paper bag machine of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the circular cover, conveying roller 2, receiving plate and cutting mechanism of the cutting device for paper bag machine of this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the arc-shaped cutter, the second spring telescopic column, the second fixing block, and the second round rod of the cutting device for the paper bag machine of this utility model;

[0022] Figure 5 This is a three-dimensional structural diagram of the circular cover, conveying roller 2, and guide block of the cutting device for the paper bag machine of this utility model;

[0023] Figure 6 This is a diagram showing the working state of a paper bag using the cutting device for a paper bag machine according to this utility model.

[0024] The components are: 1-Mounting plate, 2-Mounting base, 3-Conveyor roller one, 4-Servo motor one, 5-Mounting bracket, 6-Circular cover, 7-Conveyor roller two, 8-Servo motor two, 9-Receiving plate, 10-Paper bag.

[0025] 101-Electric slide rail, 102-Electric slider

[0026] 201-Spring telescopic column one, 202-Fixing block one, 203-Round rod one,

[0027] 301-Circular ring, 302-Geared ring, 303-Round shaft, 304-Servo motor three, 305-Spur gear, 306-Arc-shaped cutter, 307-Spring telescopic column two, 308-Fixing block two, 309-Round rod two, 310-Guide block.

[0028] 6001-Strip groove, 6002-Arc surface, 6003-Circular hole two, 7001-Circular hole one, 7002-Joint, 9001-Cutting groove, 31001-Allowing groove, 31002-Frustum section. Detailed Implementation

[0029] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0030] Example

[0031] Paper bag machine cutting device, such as Figures 1-6 As shown, it includes a mounting plate 1, a power mechanism, a mounting base 2, a conveyor roller 3, and a servo motor 4; a power mechanism is connected to the front part of the upper surface and the rear part of the upper surface of the mounting plate 1; a mounting base 2 is connected to each of the two power mechanisms; the conveyor roller 3 is rotatably connected to both mounting bases 2; the servo motor 4 is bolted to the mounting base 2 on the right, and the output shaft of the servo motor 4 is fixedly connected to the conveyor roller 3.

[0032] It also includes a mounting bracket 5, a circular cover 6, a second conveyor roller 7, a second servo motor 8, a clamping mechanism, a receiving plate 9, and a cutting mechanism; a mounting bracket 5 is fixedly attached to the front and rear of the upper surface of the mounting plate 1; a circular cover 6 is fixedly attached to both mounting brackets 5; a strip groove 6001 is opened at the front and rear of the circular cover 6; the second conveyor roller 7 is rotatably connected inside the circular cover 6; the second servo motor 8 is bolted to the right side of the circular cover 6, and the output shaft of the second servo motor 8 is fixedly connected to the second conveyor roller 7; a clamping mechanism is connected inside the circular cover 6, and the clamping mechanism is located above the second conveyor roller 7; a receiving plate 9 is fixedly attached to the rear of the circular cover 6, and the receiving plate 9 is located in the rear strip groove 6001; a cutting mechanism is connected inside the circular cover 6; the power mechanism is used to drive the mounting base 2, the first conveyor roller 3, and the first servo motor 4 to move forward or backward.

[0033] The power mechanism includes an electric slide rail 101 and an electric slider 102; the electric slide rail 101 is bolted to the front of the upper surface of the mounting plate 1, and the electric slide rail 101 is located in the front mounting bracket 5; the electric slider 102 is slidably connected to the electric slide rail 101; the electric slider 102 is fixedly connected to the front mounting seat 2.

[0034] The clamping mechanism includes a spring telescopic column 201, a fixing block 202, and a round rod 203; two spring telescopic columns 201 are fixedly connected to the upper part of the inner ring surface of the circular cover 6; a fixing block 202 is fixedly connected to the telescopic end of each of the two spring telescopic columns 201; a round rod 203 is rotatably connected to both fixing blocks 202, and the round rod 203 is in contact with the conveying roller 7.

[0035] The cutting mechanism includes a circular ring 301, a gear ring 302, a circular shaft 303, a servo motor 304, a spur gear 305, and an arc-shaped cutter 306. A circular ring 301 is rotatably connected to the left and right sides of the inner ring surface of the circular cover 6. A gear ring 302 is fixedly connected to the inner side of each circular ring 301. A circular shaft 303 is rotatably connected to the right side of the circular cover 6. A servo motor 304 is bolted to the right side of the circular cover 6. The third machine 304 is located below the second servo motor 8; the output shaft of the third servo motor 304 is fixedly connected to the round shaft 303; a spur gear 305 is fixedly connected to the round shaft 303, and the spur gear 305 meshes with the gear ring 302; an arc-shaped cutter 306 is fixedly connected between the two round rings 301, and the arc-shaped cutter 306 is located between the first round rod 203 and the receiving plate 9; the receiving plate 9 is provided with a cutting groove 9001 that matches the cutting edge of the arc-shaped cutter 306.

[0036] It also includes two spring telescopic columns 307 fixed to the inner arc surface of the arc-shaped cutter 306; each telescopic end of the two spring telescopic columns 307 is fixed to a fixing block 308, and the receiving plate 9 is located between the two fixing blocks 308; a round rod 309 is fixed to both fixing blocks 308.

[0037] Furthermore, to prevent the paper bag 10 from being scratched by the upper and lower edges of the front strip groove 6001, arc-shaped surfaces 6002 are provided on both the upper and lower sides of the front strip groove 6001.

[0038] It also includes a guide block 310 fixed to the right side of the inner annular surface of the circular cover 6, and the guide block 310 is rotatably connected to the second conveyor roller 7; the guide block 310 is located between the receiving plate 9 and the right annular ring 301; the guide block 310 is provided with a clearance groove 31001 to avoid the movement range of the arc-shaped cutter 306 and prevent the arc-shaped cutter 306 from contacting the guide block 310 and causing interference; the second conveyor roller 7 is hollow, and the left side of the second conveyor roller 7 is provided with four circular holes 7001 arranged in a ring array; the rear end of the second conveyor roller 7 is rotatably connected to a connector 7002; the left side of the circular cover 6 is provided with four circular holes 6003 arranged in a ring array; the inner arc surface of the guide block 310 has a frustum portion 31002.

[0039] The working steps of this embodiment are as follows:

[0040] The following directions are Figure 1 The reference point is the direction in which the conveyor roller number 3 is located;

[0041] The rotations described below refer to views from front to back, from top to bottom, and from right to left.

[0042] When in use, place the paper bag machine with the cutting device on the cutting process of producing paper bags 10, and set paper bag 10 transmission mechanism at both ends. Connect an external power supply to all parts that require electric drive, connect an external air blowing device to the connector 7002, and connect an external air suction device to the four round holes 6003.

[0043] Before starting, the operator pulls the first end of the paper bag 10 from the front conveyor mechanism, then pulls the first end of the paper bag 10 around the first conveyor roller 3, and through the front strip groove 6001 into the circular cover 6. Next, it passes between the second conveyor roller 7 and the first round rod 203, and moves out of the rear strip groove 6001 along the upper surface of the receiving plate 9. Then it is pulled onto the rear conveyor mechanism, as shown below. Figure 6 As shown.

[0044] After the paper bag 10 is pulled, the output shafts of servo motor 4 and servo motor 8, along with the front and rear transmission mechanisms, operate synchronously. The rotating conveyor rollers 3 and 7, in conjunction with the front and rear transmission mechanisms, continuously transport the paper bag 10 from front to back. At this time, an external sensor counts the length of the paper bag 10 that has exited the circular cover 6. When the length of the paper bag 10 reaches the target, the output shaft of servo motor 8 stops the rotation of conveyor roller 7, while the output shaft of servo motor 4 continues to rotate conveyor roller 3. Simultaneously, the electric slider 102 moves backward on the electric slide rail 101. The two electric sliders 102 move the mounting base 2, conveyor roller 3, and servo motor 4 backward together. As conveyor roller 3 moves, it carries the paper bag 10 on its surface. The increasing distance as conveyor roller 3 moves backward ensures that the paper bag 10 being transported by the front transmission mechanism to conveyor roller 3 remains taut, preventing it from becoming loose or piling up. Between the first conveyor roller 3 and the second conveyor roller 7, the continuous conveying of the paper bag 10 is affected. When the electric slider 102 moves the connected component to the rear of the electric slide rail 101, the cutting mechanism has completed the cutting of the paper bag 10. At this time, the output shaft of the second servo motor 8 is controlled to drive the connected component to rotate at high speed (the rotation speed of the output shaft of the second servo motor 8 is adjusted by the operator according to the output shaft speed of the first servo motor 4). At the same time, the electric slider 102 is controlled to drive the connected component to move forward gradually. In coordination with the output shaft speed of the second servo motor 8, the paper bag 10 that has been extended during the backward movement of the first conveyor roller 3 is quickly conveyed backward while the second conveyor roller 7 stops rotating, so that the first conveyor roller 3 returns to its original position. The same working method is used when the paper bag 10 is cut again, so that the paper bag 10 can be cut continuously without stopping the machine. This ensures product quality and does not affect the overall work efficiency.

[0045] During the time that the electric slider 102 moves with the conveyor roller 3, the cutting mechanism operates as follows: the output shaft of the servo motor 304 drives the round shaft 303 and the spur gear 305 to rotate clockwise. The spur gear 305 then drives the ring 301, the gear ring 302, the arc-shaped cutter 306, the spring telescopic column 307, the fixing block 308, and the round rod 309 to rotate together. During rotation, the round rod 309 first contacts the paper bag 10 on the receiving plate 9, forcing the two spring telescopic columns 307 to automatically compress. The round rod 309 then presses the paper bag 10 tightly. Next, the arc-shaped cutter 306... Then, it comes into contact with the paper bag 10 and cuts the paper bag 10. After the arc-shaped cutter 306 rotates into the cutting groove 9001 and the paper bag 10 is cut, the output shaft of the servo motor 304 is controlled to rotate counterclockwise, driving the connected parts to reset. In this way, while the round rod 2 309 is pressing the paper bag 10, the arc-shaped cutter 306 cuts the paper bag 10, which can prevent the paper bag 10 from shifting during cutting and affecting the cutting quality of the paper bag 10. In addition, the cutting groove 9001 supports the arc-shaped cutter 306, which can reduce the wear of the arc-shaped cutter 306 and extend the service life of the arc-shaped cutter 306.

[0046] Before this device is turned on, the external blowing and suction devices are turned on simultaneously. Airflow is continuously delivered into the hollow conveyor roller 7 through the left end connector 7002. The airflow passes through the conveyor roller 7 and exits through the four round holes 7001, entering the circular cover 6. The airflow continues to exit towards the guide block 310. Under the action of the cone-shaped part 31002 and the inner arc surface of the guide block 310, the airflow turns around and flows from the right side of the circular cover 6 to the left side of the circular cover 6 until it is sucked away by the suction devices connected to the four round holes 6003 of the circular cover 6. The debris generated by the arc-shaped cutter 306 cutting the paper bag 10 is carried away by the continuously flowing airflow, preventing the debris from accumulating inside the machine and affecting the normal operation of this device. It also prevents the debris from affecting the appearance and performance of the paper bag 10, and eliminates the need for manual cleaning, reducing the workload.

[0047] It should be noted that the guide block 310 not only guides the airflow, but also protects the toothed ring 302 and spur gear 305 on the right side of the circular cover 6, preventing the cutting debris from being blown between the toothed ring 302 and the spur gear 305 and affecting the normal use of the spur gear 305.

[0048] It should be noted that when the paper bag 10 is damp or the humidity inside the circular cover 6 is too high, the operator can control the external blower to deliver hot airflow into the conveyor roller 7 through the connector 7002. This not only removes the debris generated during cutting, but also dries the paper bag 10 and removes moisture from the circular cover 6, thus improving the practicality of the device.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cutting device for a paper bag machine, comprising a mounting plate (1), a power mechanism, a mounting base (2), a conveyor roller (3), and a servo motor (4); a power mechanism is connected to the front and rear parts of the upper surface of the mounting plate (1); a mounting base (2) is connected to each of the two power mechanisms; the conveyor roller (3) is rotatably connected to both mounting bases (2); the servo motor (4) is fixedly connected to the right mounting base (2), and the output shaft of the servo motor (4) is fixedly connected to the conveyor roller (3); characterized in that: It also includes a mounting bracket (5), a circular cover (6), a second conveyor roller (7), a second servo motor (8), a pressing mechanism, a receiving plate (9), and a cutting mechanism; a mounting bracket (5) is fixedly attached to the front and rear of the upper surface of the mounting plate (1); a circular cover (6) is fixedly attached to both mounting brackets (5); a strip groove (6001) is opened at the front and rear of the circular cover (6); a second conveyor roller (7) is rotatably connected inside the circular cover (6); a second servo motor (8) is fixedly attached to the right side of the circular cover (6). 8), and the output shaft of servo motor 2 (8) is fixedly connected to conveyor roller 2 (7); a pressing mechanism for pressing paper bag (10) is connected inside the circular cover (6), and the pressing mechanism is located above conveyor roller 2 (7); a receiving plate (9) is fixedly connected to the rear of the circular cover (6), and the receiving plate (9) is located in the rear strip groove (6001); a cutting mechanism for cutting paper bag (10) is connected inside the circular cover (6); the power mechanism is used to drive the mounting base (2), conveyor roller 1 (3) and servo motor 1 (4) to move.

2. The cutting device for a paper bag machine according to claim 1, characterized in that: The power mechanism includes an electric slide rail (101) and an electric slider (102); the electric slide rail (101) is fixedly connected to the front part of the upper surface of the mounting plate (1), and the electric slide rail (101) is located in the front mounting bracket (5); the electric slider (102) is slidably connected on the electric slide rail (101); the electric slider (102) is fixedly connected to the front mounting seat (2).

3. The cutting device for a paper bag machine according to claim 2, characterized in that: The clamping mechanism includes a spring telescopic column 1 (201), a fixing block 1 (202), and a round rod 1 (203); two spring telescopic columns 1 (201) are fixedly connected to the upper part of the inner ring surface of the circular cover (6); a fixing block 1 (202) is fixedly connected to the telescopic end of each of the two spring telescopic columns 1 (201); a round rod 1 (203) is rotatably connected to the two fixing blocks 1 (202), and the round rod 1 (203) is in contact with the conveying roller 2 (7).

4. The cutting device for a paper bag machine according to claim 3, characterized in that: The cutting mechanism includes a circular ring (301), a gear ring (302), a circular shaft (303), a servo motor (304), a spur gear (305), and an arc-shaped cutter (306); a circular ring (301) is rotatably connected to the left and right sides of the inner ring surface of the circular cover (6); a gear ring (302) is fixedly connected to the inner side of each circular ring (301); a circular shaft (303) is rotatably connected to the right side of the circular cover (6); a servo motor (304) is fixedly connected to the right side of the circular cover (6), and the servo motor (304) 304) is located below the second servo motor (8); the output shaft of the third servo motor (304) is fixedly connected to the round shaft (303); a spur gear (305) is fixedly connected to the round shaft (303), and the spur gear (305) meshes with the gear ring (302); an arc-shaped cutter (306) is fixedly connected between the two round rings (301), and the arc-shaped cutter (306) is located between the first round rod (203) and the receiving plate (9); the receiving plate (9) is provided with a cutting groove (9001) that matches the cutting edge of the arc-shaped cutter (306).

5. The cutting device for a paper bag machine according to claim 4, characterized in that: It also includes two spring telescopic columns (307) fixed to the inner arc surface of the arc-shaped cutter (306); each of the telescopic ends of the two spring telescopic columns (307) is fixed to a fixing block (308), and the receiving plate (9) is located between the two fixing blocks (308); a round rod (309) is fixed to both fixing blocks (308).

6. The cutting device for a paper bag machine according to claim 1, characterized in that: The front strip groove (6001) has arc-shaped surfaces (6002) on both the upper and lower sides.

7. The cutting device for a paper bag machine according to claim 5, characterized in that: It also includes a guide block (310) fixed to the right side of the inner ring surface of the circular cover (6), and the guide block (310) is rotatably connected to the second conveyor roller (7); the guide block (310) is located between the receiving plate (9) and the right ring (301); the guide block (310) is provided with a clearance groove (31001) to avoid the movement range of the arc-shaped cutter (306); the second conveyor roller (7) is hollow, and the left side of the second conveyor roller (7) is provided with several circular holes (7001) arranged in a ring array; the rear end of the second conveyor roller (7) is rotatably connected to a joint (7002); the left side of the circular cover (6) is provided with several circular holes (6003) arranged in a ring array; the inner arc surface of the guide block (310) has a frustum portion (31002).

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