A gum tape roll precision cutting machine

By using a detachable mounting roller and bushing combination, along with an electric telescopic rod and a limiting mechanism, the problem of existing tape roll cutting devices being unable to adjust the cutting width has been solved, thus achieving precise cutting of tape rolls.

CN224928077UActive Publication Date: 2026-11-03SUZHOU KEGUNA NEW MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202522660707.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-12-16
Publication Date
2026-11-03
Estimated Expiration
2035-12-16

AI Technical Summary

Technical Problem

Existing tape roll cutting devices cannot easily adjust the cutting width, making it impossible to meet production needs for different widths.

Method used

The system employs a combination of detachable mounting rollers, bushings of varying lengths, and movable cutter rings. By adjusting the position and distance of the bushings, along with an electric telescopic rod and a limiting mechanism, precise positioning and cutting of the cutter rings can be achieved.

Benefits of technology

It enables adjustable cutting width of tape rolls, ensuring cutting accuracy and meeting production requirements for different widths.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application belongs to the technical field of adhesive tape production, and particularly relates to an adhesive tape roll precision cutting machine, which comprises a cutting roller, a cutter ring, a shaft sleeve, a bearing block and a mounting roller. The cutter ring is arranged on the outer side of the cutting roller. The cutting roller and the cutter ring are connected through a locking assembly. The outer circumferential surface of the bearing block is provided with a slot. The left and right ends of the mounting roller are fixedly connected with an insertion block. The insertion block is inserted into the slot. The insertion block is detachably connected with the bearing block through a threaded rod. The shaft sleeve slides on the outer wall of the mounting roller. The number of the shaft sleeves is multiple, and the lengths of the multiple shaft sleeves are different. The detachable mounting roller, the shaft sleeves with different lengths and detachable relative to the mounting roller and the displaceable cutter ring are matched, so that the cutter ring can be adjusted to different distances according to the requirement. Through the movement of the shaft sleeve, the cutter ring is ensured to be located in the cutter groove between the two shaft sleeves, and the adhesive tape roll with a specified width can be cut.
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Description

Technical Field

[0001] This application belongs to the field of tape production technology, specifically a tape roll precision cutting machine. Background Technology

[0002] Adhesive tape is an adhesive material made of a substrate (such as plastic film, paper or cloth) and an adhesive (such as natural rubber, acrylic or silicone). With its convenient adhesion properties, it can be used for fixing items, sealing packaging boxes, sticking notes and so on in daily life.

[0003] To ensure that the width of the transparent film matches the width of the tape during production, it is often necessary to cut the transparent film to ensure that its width meets production requirements. However, current tape roll cutting devices can only cut tape rolls of a specified width, making it inconvenient to adjust the cutting width. Therefore, a tape roll precision cutting machine needs to be designed to solve the above problems. Utility Model Content

[0004] The purpose of this application is to address the shortcomings of existing technologies by designing a tape roll precision cutting machine that uses a detachable mounting roller, bushings of varying lengths, and a movable cutter ring, thereby solving the problem of inconvenience in cutting tape rolls to a specified width.

[0005] To achieve the above objectives, the following technical solution is adopted: A tape roll precision cutting machine includes a cutting roller, a blade ring, a bushing, a support block, and a mounting roller. The blade ring is coaxially mounted on the cutting roller, and its inner diameter is larger than the outer diameter of the cutting roller. The cutting roller and the blade ring are connected by a locking assembly. A slot is formed on the outer circumferential surface of the support block. Insert blocks are fixedly connected to the left and right ends of the mounting roller and are inserted into the slots. The insert blocks are detachably connected to the support block via threaded rods. The bushing slides on the outer wall of the mounting roller. There are multiple bushings, each with a different length. A cutting groove is formed between any two adjacent bushings. A bushing limiting mechanism is provided on the outer circumferential surface of the mounting roller. A driving mechanism is provided on the right side of the cutting roller, and the actuator end of the driving mechanism is connected to the cutting roller.

[0006] Preferably, the locking assembly includes a cutter holder, a locking ring, a bolt, and a nut. The outer circumferential surface of the cutter holder is fixedly connected to the inner circumferential surface of the cutter ring. The cutter holder slides coaxially on the outer circumferential surface of the cutting roller. The locking ring is disposed on the outer circumferential surface of the cutter holder. A protrusion is provided on the top of the locking ring. The bolt passes through the top protrusion of the locking ring. The inner wall of the nut is threadedly connected to the outer wall of the bolt.

[0007] Preferably, it also includes a machine body, wherein the end of the bearing block away from the middle of the mounting roller is fixedly connected to the inner wall of the machine body.

[0008] Preferably, the drive mechanism is fixedly installed on the inner wall of the machine body. The drive mechanism includes a motor, a mounting frame, a rotating roller, and a conveyor belt. The right surface of the motor is fixedly connected to the inner wall of the machine body. The output shaft of the motor passes through the inner wall of the mounting frame and is fixedly connected to the right end of the rotating roller. The outer wall of the rotating roller passes through and is rotatably connected to the outer wall of the mounting frame. The outer wall of the rotating roller and the outer wall of the cutting roller are connected by a conveyor belt.

[0009] Preferably, it further includes a distance adjustment component, which is fixedly connected to the inner wall of the machine body. The distance adjustment component is located on the right side of the mounting frame, and the left surface of the distance adjustment component contacts the right surface of the mounting frame. The actuator of the distance adjustment component controls the connection to the mounting frame.

[0010] Preferably, the distance adjustment assembly includes an electric telescopic rod, a moving block, and a driving block. The outer wall of the electric telescopic rod is fixedly connected to the inner wall of the machine body through a connecting frame. The output shaft of the electric telescopic rod is fixedly connected to the upper front side of the moving block. The driving block is fixedly connected to the left surface of the moving block. The left surface of the moving block contacts the right surface of the mounting frame. A driving groove is provided on the right side of the mounting frame. The left part of the driving block is disposed inside the driving groove.

[0011] Preferably, the bushing limiting mechanism includes a limiting sleeve, an annular airbag, a pressure chamber, a sliding plate, a compression airbag, and a binding strap. Two limiting sleeves are provided, and the two limiting sleeves slide coaxially on the outer circumferential surface of the mounting roller. The two limiting sleeves are respectively located on the left and right sides of the bushing. The annular airbag is fixedly connected to the inner circumferential surface of the limiting sleeve. The pressure chamber is formed on the inner wall of the limiting sleeve. The compression airbag is fixedly connected to the outer circumferential surface of the limiting sleeve. The interior of the annular airbag communicates with the interior of the pressure chamber, and the interior of the compression airbag communicates with the interior of the pressure chamber. The inner wall of the pressure chamber is piston-connected to the outer wall of the sliding plate. One end of the sliding plate near the axis of the limiting sleeve is elastically connected to the inner wall of the pressure chamber via a spring. The binding strap is wrapped around the outer circumferential surface of the limiting sleeve.

[0012] Preferably, the inner wall of the machine body is rotatably connected to a feeding roller, the inner wall of the machine body is rotatably connected to a receiving roller, and the inner wall of the machine body is rotatably connected to a limiting roller. The number of limiting rollers is set to two groups, and each group has two limiting rollers. The two limiting rollers in the same group are separated by a preset distance, which is less than 1 cm.

[0013] Compared with the prior art, the beneficial effects of this application are: 1. This application uses a combination of a detachable mounting roller, bushings of varying lengths that are detachable from the mounting roller, and a movable cutter ring. This allows the cutter ring to be adjusted to different intervals as needed. At the same time, by moving the bushings, the cutter ring is ensured to be in the cutter groove between the two bushings, thus achieving the effect of cutting tape rolls of a specified width.

[0014] 2. This application adopts an electric telescopic rod, a moving block, a driving block, and a driving groove to ensure that the cutting roller and the blade ring can rotate around the rotating roller, thereby ensuring that the distance between them and the bushing is inconsistent before and after rotation, thus ensuring that the transparent film can be smoothly placed between the blade ring and the bushing to achieve the expected effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure in this application; Figure 2 This is a side sectional view of the overall structure in this application; Figure 3 This is a schematic diagram of the bushing, cutter ring, drive mechanism, distance adjustment assembly and bushing limiting mechanism in this application; Figure 4 This is a cross-sectional schematic diagram of the distance adjustment component and drive mechanism in this application; Figure 5 This is a schematic diagram of the knife ring and locking assembly in this application; Figure 6 This is a schematic diagram showing the disassembled components of the cutting roller, bushing, and bearing block in this application; Figure 7 This is a partial disassembly diagram of the cutting roller, bushing, and bearing block in this application; Figure 8 This is a cross-sectional schematic diagram of the limiting sleeve and its internal structure in this application; Figure 9 for Figure 8 Enlarged view of point A in the middle.

[0016] The components include: 1. Cutting roller; 2. Blade ring; 3. Locking assembly; 4. Bearing block; 41. Slot; 42. Insert block; 5. Mounting roller; 6. Bushing limiting mechanism; 7. Drive mechanism; 31. Blade holder; 32. Locking ring; 33. Bolt; 34. Nut; 71. Motor; 72. Mounting frame; 73. Rotating roller; 74. Conveyor belt; 8. Distance adjustment assembly; 81. Electric telescopic rod; 82. Moving block; 83. Driving block; 84. Driving groove; 61. Limiting sleeve; 62. Annular airbag; 63. Air chamber; 64. Slide plate; 65. Spring; 66. Extrusion airbag; 67. Binding strap; 9. Feeding roller; 10. Receiving roller; 11. Limiting roller; 12. Machine body; 13. Blade groove; 14. Bushing. Detailed Implementation

[0017] ReferenceFigure 1 - Figure 9 A tape roll precision cutting machine includes a cutting roller 1, a blade ring 2, a bushing 14, a support block 4, and a mounting roller 5. The blade ring 2 is coaxially mounted on the cutting roller 1, and its inner diameter is larger than the outer diameter of the cutting roller 1. The cutting roller 1 and the blade ring 2 are connected by a locking assembly 3. A slot 41 is provided on the outer circumferential surface of the support block 4. Insert blocks 42 are fixedly connected to the left and right ends of the mounting roller 5. The insert blocks 42 are inserted into the slots 41 and are detachably connected to the support block 4 by threaded rods. This detachable connection ensures that the mounting roller 5 can be removed from the support block 4. The bushing 14 slides on the outer wall of the mounting roller 5. Multiple bushings 14 are provided, and the lengths of each bushing 14 are not equal. A cutting groove 13 is formed between two adjacent bushings 14. By sliding the bushings 14 off the disassembled mounting roller 5 and rearranging them, the position of the cutting groove 13 formed between two adjacent bushings 14 can be changed as needed. A bushing limiting mechanism 6 is provided on the outer circumference of the mounting roller 5. The bushing limiting mechanism 6 is used to limit the bushings 14, ensuring that there are objects on both sides of the bushings 14 that limit them in the left and right directions during the use of the equipment, thereby preventing the bushings 14 from falling off during use. A drive mechanism 7 is provided on the right side of the cutting roller 1. The actuator of the drive mechanism 7 is connected to the cutting roller 1. The drive mechanism 7 is used to drive the cutting roller 1 to rotate.

[0018] In this embodiment, during use, the operator first disassembles the mounting roller 5, then releases the bushing limiting mechanism 6 from limiting the bushing 14, takes out the bushing 14, and rearranges and combines the bushings 14 according to the required width so that the required width is exactly where the cutting groove 13 exists. Then, after installing the bushing limiting mechanism 6 on the outside of the bushing 14, the adjusted mounting roller 5 is installed in the bearing block 4 through the threaded rod. Then, the locking assembly 3 is used to release the fixed state between the cutting ring 2 and the cutting roller 1, and then the cutting ring 2 is moved to the designated cutting groove 13. After the movement is completed, the locking assembly 3 is used to fix the cutting ring 2. At this time, when the transparent film moves to the position between the cutting ring 2 and the bushing 14, it can be cut to the designated width under the cutting action of the cutting ring 2.

[0019] As a preferred embodiment, the locking assembly 3 includes a cutter holder 31, a locking ring 32, a bolt 33, and a nut 34. The outer circumferential surface of the cutter holder 31 is fixedly connected to the inner circumferential surface of the cutter ring 2. The cutter holder 31 slides coaxially on the outer circumferential surface of the cutting roller 1. The material of the cutter holder 31 is soft rubber, and the inner diameter of the cutter holder 31 is larger than the outer diameter of the cutting roller 1. This diameter comparison ensures that the cutter holder 31 can slide on the outside of the cutting roller 1. The locking ring 32 is disposed on the outer circumferential surface of the cutter holder 31. When the locking ring 32 is locked, the cutter holder 31 is subjected to force. The inner circumference of the blade holder 31 is pressed inward, thus the friction force fixes the blade holder 31 relative to the cutting roller 1. The top of the locking ring 32 has a protrusion, and the bolt 33 passes through the protrusion on the top of the locking ring 32. The inner wall of the nut 34 is threadedly connected to the outer wall of the bolt 33. When the nut 34 is rotated away from the side of the bolt 33 with the protrusion, there is a gap between the two ends of the locking ring 32. Therefore, the locking ring 32 releases the blade holder 31, so the blade holder 31 can slide outside the cutting roller 1 at this time.

[0020] As a preferred embodiment, the system also includes a body 12, which is used to install workpieces such as a motor 71, an electric telescopic rod 81, and a bearing block 4. One end of the bearing block 4 away from the middle of the mounting roller 5 is fixedly connected to the inner wall of the body 12.

[0021] In a preferred embodiment, the drive mechanism 7 is fixedly installed on the inner wall of the machine body 12. The drive mechanism 7 includes a motor 71, a mounting frame 72, a rotating roller 73, and a conveyor belt 74. The right surface of the motor 71 is fixedly connected to the inner wall of the machine body 12. The output shaft of the motor 71 passes through the inner wall of the mounting frame 72 and is fixedly connected to the right end of the rotating roller 73. The motor 71 is used to drive the rotating roller 73 to rotate. When the motor 71 is in a stopped state, the rotating roller 73 is fixed relative to the motor 71. The outer wall of the rotating roller 73 passes through and is rotatably connected to the outer wall of the mounting frame 72. The outer wall of the rotating roller 73 is connected to the outer wall of the cutting roller 1 through the transmission of the conveyor belt 74. After the motor 71 drives the rotating roller 73 to rotate, the outer wall of the rotating roller 73 drives the conveyor belt 74 to move through friction, thereby causing the conveyor belt 74 to drive the cutting roller 1 to rotate through friction.

[0022] As a preferred embodiment, a distance adjustment component 8 is also included. The distance adjustment component 8 is fixedly connected to the inner wall of the machine body 12. The distance adjustment component 8 is located on the right side of the mounting frame 72, and the left surface of the distance adjustment component 8 contacts the right surface of the mounting frame 72. The actuator of the distance adjustment component 8 controls the connection of the mounting frame 72. The distance adjustment component 8 is used to adjust the distance between the cutting roller 1 and the bushing 14, thereby ensuring that during the preparation stage of cutting the tape roll, the cutting roller 1 and its outer blade ring 2 can be adjusted to a position where the distance between them and the bushing 14 is sufficient to pass through the transparent film. After the transparent film passes through, it is then reset.

[0023] In a preferred embodiment, the distance adjustment assembly 8 includes an electric telescopic rod 81, a moving block 82, and a driving block 83. The outer wall of the electric telescopic rod 81 is fixedly connected to the inner wall of the body 12 via a connecting frame. The output shaft of the electric telescopic rod 81 is fixedly connected to the upper front side of the moving block 82. The driving block 83 is fixedly connected to the left surface of the moving block 82, and the left surface of the moving block 82 contacts the right surface of the mounting frame 72. The driving block 83 is cylindrical in shape. A driving groove 84 is provided on the right side of the mounting frame 72, and the width of the driving groove 84 is the same as the diameter of the driving block 83. Since the moving block 82 is penetrated by the rotating roller 73, and the moving block 82 is rotatably connected to the rotating roller 73, the movement path of the moving block 82 must be a path of rotation around the axis of the rotating roller 73. Therefore, it is necessary to ensure, through the driving groove 84, that the linear movement of the driving block 83 can always drive the moving block 82 to rotate around the axis of the rotating roller 73. Rotating around the axis of the rotating roller 73, the left part of the drive block 83 is set inside the drive groove 84. When the output axis of the electric telescopic rod 81 moves outward, it pushes the moving block 82, which moves the moving block 82 backward, so that the drive block 83 moves backward synchronously with it. During the movement, the drive block 83 pushes the inner wall of the drive groove 84, causing the moving block 82 to move backward. This causes the moving block 82 to drive the cutting roller 1 and its outer blade ring 2 to move towards the bushing 14. When the output axis of the electric telescopic rod 81 retracts inward, it pulls the moving block 82 forward, so that the drive block 83 moves forward synchronously with it. During the movement, the drive block 83 pushes the inner wall of the drive groove 84, causing the moving block 82 to move forward, so that the cutting roller 1 and its outer blade ring 2 move away from the bushing 14.

[0024] As a preferred embodiment, the bushing limiting mechanism 6 includes a limiting sleeve 61, an annular airbag 62, a pressure chamber 63, a sliding plate 64, a compression airbag 66, and a binding strap 67. Two limiting sleeves 61 are provided, and the two limiting sleeves 61 slide coaxially on the outer circumferential surface of the mounting roller 5. The two limiting sleeves 61 are respectively located on the left and right sides of the bushing 14. The annular airbag 62 is fixedly connected to the inner circumferential surface of the limiting sleeve 61. The pressure chamber 63 is formed on the inner wall of the limiting sleeve 61. The pressure chamber 63 is cylindrical in shape, with a smooth inner wall. A compression airbag 66 is fixedly connected to the outer circumference of the limiting sleeve 61. The interior of the annular airbag 62 communicates with the interior of the pressure chamber 63, as does the interior of the compression airbag 66. The inner wall of the pressure chamber 63 is piston-connected to the outer wall of the sliding plate 64, which fits against the inner wall of the pressure chamber 63. One end of the sliding plate 64 closest to the axis of the limiting sleeve 61 is flush with the inner wall of the pressure chamber 63. The spring 65 is elastically connected to the slide plate 64 near the axis of the limiting sleeve 61. The other end of the spring 65 is fixedly connected to the inner wall of the air chamber 63. The binding strap 67 is wrapped around the outer circumference of the limiting sleeve 61. The binding strap 67 is inelastic. By binding the binding strap 67 to the outer circumference of the limiting sleeve 61, it is ensured that the binding strap 67 can press down the compression airbag 66. As a result, the airbag 66 is compressed, and the gas inside it enters the air chamber 63. This increases the air pressure in the air chamber 63 outside the slide plate 64. As a result, the slide plate 64 moves towards the axis of the limiting sleeve 61 under the action of air pressure, thus pushing the gas into the annular airbag 62. This causes the annular airbag 62 to expand, so that the outer wall of the annular airbag 62 fits against the outer wall of the mounting roller 5, thereby increasing the friction between them and the mounting roller 5. This ensures that the limiting sleeve 61 is fixed on the outer circumference of the mounting roller 5.

[0025] As a preferred embodiment, a feeding roller 9 is rotatably connected to the inner wall of the machine body 12. Uncut tape rolls are wound around the outer circumference of the feeding roller 9. A receiving roller 10 is rotatably connected to the inner wall of the machine body 12. Cut tape rolls are wound around the outer circumference of the receiving roller 10. A limiting roller 11 is rotatably connected to the inner wall of the machine body 12. The number of limiting rollers 11 is set to two sets, with two limiting rollers 11 in each set. There is a preset distance between the two limiting rollers 11 in the same set, and this distance is less than 1 cm. By placing the tape roll between the two limiting rollers 11 in the same set, the tape roll is limited.

Claims

1. A tape roll precision cutting machine, characterized in that, The assembly includes a cutting roller (1), a blade ring (2), a bushing (14), a support block (4), and an mounting roller (5). The blade ring (2) is coaxially mounted on the cutting roller (1), and the inner diameter of the blade ring (2) is larger than the outer diameter of the cutting roller (1). The cutting roller (1) and the blade ring (2) are connected by a locking assembly (3). The outer circumferential surface of the support block (4) has a slot (41). The left and right ends of the mounting roller (5) are fixedly connected to inserts (42), which are inserted into the slots (41). (42) The bushing (14) is detachably connected to the bearing block (4) by a threaded rod. The bushing (14) slides on the outer wall of the mounting roller (5). The number of bushings (14) is set to multiple. The length of each bushing (14) is not equal. A knife groove (13) is formed between any two adjacent bushings (14). A bushing limiting mechanism (6) is provided on the outer circumference of the mounting roller (5). A driving mechanism (7) is provided on the right side of the cutting roller (1). The execution end of the driving mechanism (7) is connected to the cutting roller (1) for transmission.

2. The tape roll precision cutting machine according to claim 1, characterized in that: The locking assembly (3) includes a cutter holder (31), a locking ring (32), a bolt (33), and a nut (34). The outer circumferential surface of the cutter holder (31) is fixedly connected to the inner circumferential surface of the cutter ring (2). The cutter holder (31) slides coaxially on the outer circumferential surface of the cutting roller (1). The locking ring (32) is set on the outer circumferential surface of the cutter holder (31). The top of the locking ring (32) is provided with a protrusion. The bolt (33) passes through the top protrusion of the locking ring (32). The inner wall of the nut (34) is threadedly connected to the outer wall of the bolt (33).

3. The tape roll precision cutting machine according to claim 1, characterized in that: It also includes a body (12), and one end of the bearing block (4) away from the middle of the mounting roller (5) is fixedly connected to the inner wall of the body (12).

4. The tape roll precision cutting machine according to claim 3, characterized in that: The drive mechanism (7) is fixedly installed on the inner wall of the machine body (12). The drive mechanism (7) includes a motor (71), a mounting frame (72), a rotating roller (73), and a conveyor belt (74). The right surface of the motor (71) is fixedly connected to the inner wall of the machine body (12). The output shaft of the motor (71) passes through the inner wall of the mounting frame (72). The output shaft of the motor (71) is fixedly connected to the right end of the rotating roller (73). The outer wall of the rotating roller (73) passes through and is rotatably connected to the outer wall of the mounting frame (72). The outer wall of the rotating roller (73) is connected to the outer wall of the cutting roller (1) through the conveyor belt (74).

5. A tape roll precision cutting machine according to claim 3, characterized in that: It also includes a distance adjustment component (8), which is fixedly connected to the inner wall of the body (12). The distance adjustment component (8) is located on the right side of the mounting frame (72). The left surface of the distance adjustment component (8) is in contact with the right surface of the mounting frame (72). The actuator of the distance adjustment component (8) controls the connection to the mounting frame (72).

6. A tape roll precision cutting machine according to claim 5, characterized in that: The distance adjustment assembly (8) includes an electric telescopic rod (81), a moving block (82), and a drive block (83). The outer wall of the electric telescopic rod (81) is fixedly connected to the inner wall of the body (12) through a connecting frame. The output shaft of the electric telescopic rod (81) is fixedly connected to the upper front side of the moving block (82). The drive block (83) is fixedly connected to the left surface of the moving block (82). The left surface of the moving block (82) is in contact with the right surface of the mounting frame (72). The right side of the mounting frame (72) is provided with a drive groove (84). The left part of the drive block (83) is located inside the drive groove (84).

7. A tape roll precision cutting machine according to claim 1, characterized in that: The bushing limiting mechanism (6) includes a limiting sleeve (61), an annular airbag (62), a pressure chamber (63), a sliding plate (64), a compression airbag (66), and a binding strap (67). Two limiting sleeves (61) are provided, and the two limiting sleeves (61) slide coaxially on the outer circumferential surface of the mounting roller (5). The two limiting sleeves (61) are located on the left and right sides of the bushing (14), respectively. The annular airbag (62) is fixedly connected to the inner circumferential surface of the limiting sleeve (61). The pressure chamber (63) is formed inside the limiting sleeve (61). The compression airbag (66) is fixedly connected to the outer circumferential surface of the limiting sleeve (61). The interior of the annular airbag (62) is connected to the interior of the air pressure chamber (63). The interior of the compression airbag (66) is connected to the interior of the air pressure chamber (63). The inner wall of the air pressure chamber (63) is piston-connected to the outer wall of the sliding plate (64). One end of the sliding plate (64) near the axis of the limiting sleeve (61) is elastically connected to the inner wall of the air pressure chamber (63) by a spring (65). The binding strap (67) is wrapped around the outer circumferential surface of the limiting sleeve (61).

8. A tape roll precision cutting machine according to claim 4, characterized in that: The inner wall of the machine body (12) is rotatably connected to a feeding roller (9), the inner wall of the machine body (12) is rotatably connected to a receiving roller (10), and the inner wall of the machine body (12) is rotatably connected to a limiting roller (11). The number of the limiting rollers (11) is set to two groups, and each group of the limiting rollers (11) is set to two. The two limiting rollers (11) in the same group are at a preset distance and the distance is less than 1 cm.