Zipper cutting machine

Abstract

The utility model relates to a zipper cutting machine which solves the problems that in the prior art, time and labor are wasted during manual zipper cutting, waste is easily caused and the like, and the technical scheme is that the zipper cutting machine comprises an unwinding mechanism and a cutting mechanism, and the unwinding mechanism comprises an unwinding structure and a power mechanism driving the unwinding structure to rotate. The device is characterized in that the device further comprises a flattening mechanism arranged between the unwinding mechanism and the cutting mechanism, the unwinding mechanism is used for enabling the zipper roll to keep constant tension to stably release the zipper, the flattening mechanism is used for enabling the released zipper to keep flat and prevent torsion, and the cutting mechanism is used for cutting the released zipper. The zipper cutting device has the advantages that the zipper is cut through mechanical equipment, the zipper roll can keep constant tension to stably release the zipper, the zipper is flattened and prevented from twisting through the flattening mechanism, and therefore the zipper cutting efficiency and quality can be improved, the labor intensity can be reduced, consumption of the zipper on a mattress is reasonable, and the cost can be accurately controlled; and the waste condition is reduced and even avoided.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and in particular to a zipper cutting machine. Background Technology

[0002] Existing mattress products (such as cushions, pillows, duvet covers, bed sheets, mattress protectors, mattress insert covers, etc.; for simplicity, this article uses "mattress" to represent various products) typically have a single zipper running along the entire side of the mattress. This single zipper allows for easy removal and replacement or washing of the top, bottom, and side panels. Current zippers are made by cutting a zipper to a specific length from a roll of zipper pulls, then attaching zipper heads to create a zipper of suitable length for use with mattresses. Since mattresses come in different sizes, zippers of varying lengths need to be cut.

[0003] Currently, zippers are cut manually. However, manual zipper cutting often presents the following problems: 1. Because mattress zippers are relatively long, manual measurement and cutting are time-consuming and labor-intensive. 2. During the cutting process, the zipper is manually pulled out of the zipper roll. Each zipper requires several pulls, and the tension generated on the zipper varies with each pull, resulting in inconsistent zipper lengths. If the zipper is too long, it leads to excessive zipper consumption and increased zipper costs; if it is too short, it does not fit the mattress size, rendering the entire zipper unusable and further increasing zipper consumption costs. Summary of the Invention

[0004] The purpose of this utility model is to solve the above-mentioned problems existing in the prior art by providing a zipper cutting machine. By cutting zippers with mechanical equipment, the zipper roll can be released smoothly with constant tension, and the zipper can be flattened and prevented from twisting by a flattening mechanism. This can improve the efficiency and quality of zipper cutting, thereby making the consumption of zippers on mattresses more reasonable and the cost more accurately controlled, reducing or even avoiding waste caused by zippers that are too long or too short.

[0005] The above-mentioned technical objective of this utility model is mainly achieved through the following technical solution: a zipper cutting machine, comprising an unwinding mechanism and a cutting mechanism. The unwinding mechanism includes an unwinding structure and a power mechanism for driving the unwinding structure to rotate. The machine is characterized by further including a leveling mechanism disposed between the unwinding mechanism and the cutting mechanism. The unwinding mechanism is used to maintain a constant tension on the zipper roll and smoothly release the zipper. The leveling mechanism is used to keep the released zipper flat and prevent twisting. The cutting mechanism is used to cut the released zipper. By cutting zippers using mechanical equipment, the zipper roll can maintain a constant tension and smoothly release the zipper, avoiding problems such as zippers being too long due to insufficient tension or too short due to excessive tension. Furthermore, the leveling mechanism ensures the zipper is flat and prevents twisting, thereby improving zipper cutting efficiency and quality. This helps to ensure reasonable consumption of zippers in items such as mattresses and allows for more precise cost control, reducing or even avoiding waste caused by zippers being too long or too short.

[0006] As a further improvement and supplement to the above technical solution, this utility model adopts the following technical measures: The unwinding structure includes a vertically upward-inclined turntable that cooperates with the power mechanism, and an upward-inclined, protruding sleeve structure disposed on the turntable. The sleeve structure is used to insert into the cavity of the zipper roll, limiting and supporting the zipper roll on the turntable. The power mechanism is used to rotate the turntable, which drives the sleeve structure to rotate synchronously, so that the zipper roll releases the zipper along with the turntable and the sleeve structure. The sleeve structure is used to fix the zipper roll. The upward-inclined protrusion of the sleeve structure allows the turntable to support the zipper roll while reducing the load on the power mechanism, facilitating the rotation of the turntable, and enabling the zipper roll to release the zipper smoothly and with constant tension. The turntable is rotated by a power mechanism, which makes the turntable rotate at a uniform speed. This also helps to control the zipper roll to release the zipper smoothly and with constant tension. This helps to control the length of the cut zippers and ensure that the length of each cut zipper is basically consistent. This not only benefits the subsequent production and processing of mattresses and other products, but also improves the utilization rate of zippers and reduces costs.

[0007] Preferably, the flattening mechanism includes a base, and a first positioning mechanism, a flattening mechanism, and a second positioning mechanism arranged sequentially on the base along the zipper's forward direction. The first positioning mechanism is used to flatten, position, and guide the zipper. The flattening mechanism is used to press the zipper onto the table surface of the base, providing support for the lower part of the zipper. The second positioning mechanism ensures precise positioning of the zipper and stable movement of the zipper against the table surface. The flattening mechanism ensures that the zipper remains flat during the transmission of the cutting blade, which not only improves cutting accuracy but also facilitates flat cutting, making subsequent zipper application in production and processing more efficient.

[0008] Preferably, the flattening mechanism includes pressure plates pivotally connected to the base at both ends. The front end and thickness of the pressure plate have an upward curve, which makes the zipper inlet and outlet ends of the pressure plate smooth, preventing snagging and guiding the zipper. The zipper passes through the gap between the pressure plate and the base surface, keeping the zipper flat during transmission, avoiding curling and twisting, and ensuring that the front and back of the zipper are always consistent, thereby improving cutting efficiency.

[0009] Preferably, the first positioning mechanism includes a pivot at both ends connected to the base, and several positioning plates disposed on the pivot. The width of each positioning plate is adapted to the width of the fabric piece on the zipper, and the spacing between adjacent positioning plates is adapted to the width of the zipper teeth. Two adjacent positioning plates are used to press down on two fabric pieces on a zipper respectively, preventing the zipper from twisting during transmission. The use of multiple positioning plates facilitates the simultaneous entry of multiple zippers into the cutting mechanism for cutting, thereby improving cutting efficiency.

[0010] Preferably, the second positioning mechanism includes several positioning blocks spaced apart on the base. The spacing between adjacent positioning blocks is adjustable. These blocks are used to press the two fabric pieces onto the zipper to fit the zipper size, ensuring the zipper fits snugly against the cutting surface for precise cutting. The positioning blocks further enhance the zipper's anti-rolling, anti-twisting, and anti-deviation properties, ensuring the zipper remains in the correct position before entering the cutting mechanism, thereby improving cutting accuracy.

[0011] Preferably, a roller is provided between the second positioning mechanism and the cutting mechanism. The rotation of the roller drives the zipper to move towards the cutting mechanism, ensuring constant tension movement of the zipper and preventing stretching or stacking. A certain pressure exists between the roller and the zipper. The rolling of the roller generates friction between the roller and the zipper, which drives the zipper to move into the cutting mechanism. This helps control the zipper's moving speed and displacement, thereby facilitating accurate cutting of the zipper and ensuring a certain precision in the cut zipper length.

[0012] Preferably, the zipper cutting machine also includes a marking mechanism, which is positioned between the flattening mechanism and the cutting mechanism. The marking device on the marking mechanism is used to mark dots on the zipper, and the marking device is positioned in front of the cutting blades of the cutting mechanism. The marking mechanism marks the zipper, allowing the operator to promptly observe the markings and perform corresponding actions when the zipper is being processed on actual products (e.g., after sewing one side of a mattress, it needs to be turned to sew the other side). This facilitates timely action by the operator, thereby improving subsequent processing efficiency and quality.

[0013] Preferably, the zipper cutting machine also includes several sets of tension buffer mechanisms. The tension buffer mechanisms are arranged between the flattening mechanism and the unwinding mechanism. The tension buffer mechanisms are used to buffer and guide the zipper, prevent the zipper from winding, and facilitate the appropriate lengthening of the zipper's stroke. This helps the zipper to always remain flat and maintain appropriate tension, which in turn improves the flattening effect of the subsequent flattening mechanism. Ultimately, it ensures that the zipper enters the cutting mechanism with constant tension and a flat surface for cutting.

[0014] Preferably, the tension buffer mechanism includes a height-adjustable U-shaped support block and a guide roller spaced apart from and positioned above the support block. The gap between the support block and the guide roller forms a zipper passageway. The inner width of the support block is adapted to the width of the zipper, enabling the zipper to move smoothly and with constant tension. During operation, the guide roller continuously rolls, the zipper adheres to the guide roller, and the rolling motion of the guide roller generates friction on the zipper. This friction drives the zipper towards the smoothing mechanism, not only providing a pushing force to maintain constant tension on the zipper but also helping to keep the zipper in a smooth conveying state.

[0015] The beneficial effects of this invention are as follows: 1. By using mechanical equipment to cut zippers, the zipper roll can be released smoothly with constant tension. A flattening mechanism ensures the zipper is flat and prevents twisting, thereby improving cutting efficiency and quality. This leads to more reasonable zipper consumption on mattresses and more precise cost control, reducing or even eliminating waste caused by zippers being too long or too short. 2. The sleeve structure is used to fix the zipper roll. The sleeve structure is tilted upwards, allowing the turntable to support the zipper roll while reducing the load on the power mechanism. This facilitates turntable rotation, allowing the zipper roll to be released smoothly with constant tension. 3. The power mechanism rotates the turntable at a uniform speed, which also helps control the smooth and constant tension release of the zipper roll. This helps control the length of the cut zippers, ensuring that each cut zipper is of a relatively consistent length. This not only benefits subsequent mattress and other product manufacturing but also improves zipper utilization and reduces costs. 4. The flattening mechanism ensures the zipper remains flat during the cutting process, improving cutting accuracy and facilitating smooth cutting. This makes subsequent production and processing more efficient. 5. The marking mechanism marks the zipper, allowing operators to easily observe these marks and perform corresponding actions (e.g., after sewing one side of a mattress, turning to sew the other). This improves efficiency and quality. 6. The tension buffer mechanism cushions and guides the zipper, preventing tangling and allowing for a longer stroke. This helps maintain flatness and appropriate tension, enhancing the flattening effect and ensuring a consistent and flat zipper before cutting. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a structure of the present invention (on which a zipper roll is placed).

[0017] Figure 2 This is a schematic diagram of the unwinding mechanism and tension buffer mechanism in this utility model.

[0018] Figure 3 yes Figure 1 Remove Figure 2 A schematic diagram of a structure other than the one involved.

[0019] Figure 4 yes Figure 3 Another structural diagram from another perspective.

[0020] In the diagram: 1. Unwinding mechanism; 2. Cutting mechanism; 3. Turntable; 4. Roll-up structure; 5. Base; 6. First positioning mechanism; 7. Flattening mechanism; 8. Second positioning mechanism; 9. Pressing sheet; 10. Upward-curving part; 11. Pivot; 12. Positioning piece; 13. Positioning block; 14. Table; 15. Roller; 16. Dotting mechanism; 17. Dotting device; 18. Cutting shears; 19. Tension buffer mechanism; 20. Support block; 21. Guide roller; 22. Zipper; 23. Zipper roll; 24. Guide rod. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0022] Example: Figures 1-4 As shown, a zipper cutting machine includes an unwinding mechanism 1 and a cutting mechanism 2. The unwinding mechanism 1 includes an unwinding structure and a power mechanism for driving the unwinding structure to rotate.

[0023] The difference between this technical solution and the prior art is that the zipper cutting machine also includes a leveling mechanism disposed between the unwinding mechanism 1 and the cutting mechanism 2. The unwinding mechanism 1 is used to keep the zipper roll 23 under constant tension and smoothly release the zipper 22. The leveling mechanism is used to keep the released zipper 22 flat and prevent it from twisting. The cutting mechanism 2 is used to cut the released zipper 22.

[0024] In this technical solution, by using mechanical equipment to cut the zipper 22, the zipper roll 23 can maintain a constant tension and smoothly release the zipper 22, avoiding problems such as the zipper 22 being too long due to insufficient tension or too short due to excessive tension. Furthermore, the flattening mechanism ensures that the zipper 22 is flat and prevents twisting, thereby improving the cutting efficiency and quality of the zipper 22. This helps to make the consumption of the zipper 22 on items such as mattresses more reasonable and the cost can be more accurately controlled, reducing or even avoiding waste caused by the zipper 22 being too long or too short.

[0025] In practical applications, in order to improve the automation level of zipper cutting machines, an electronic control system is often set up. The electronic control system is connected to the power mechanism (such as a motor) on the unwinding mechanism 1 by electrical signal, and to the power mechanism (such as a telescopic motor) on the cutting mechanism 2 that controls the cutting scissors 18 and the power mechanism (such as a telescopic motor) that controls the dotting device 17 by electrical signal. It is used to control the automated operation of the unwinding mechanism 1 and the cutting mechanism 2, thereby improving the cutting efficiency and cutting quality of the zipper 22.

[0026] Next, we will further refine the above technical solution:

[0027] In practical applications, the unwinding structure includes a turntable 3 that is vertically inclined upwards and cooperates with the power mechanism, and a sleeve structure 4 that is inclined upwards and disposed on the turntable 3. The sleeve structure 4 is used to insert into the cavity of the zipper roll 23, so that the zipper roll 23 is limited and supported on the turntable 3. The power mechanism is used to rotate the turntable 3, and the turntable 3 drives the sleeve structure 4 to rotate synchronously, so that the zipper roll 23 releases the zipper 22 by rotating synchronously with the turntable 3 and the sleeve structure 4.

[0028] In this technical solution, the sleeve structure 4 is used to fix the zipper roll 23. The sleeve structure 4 is tilted and protrudes upward, so that the turntable 3 can both support the zipper roll 23 and reduce the load on the power mechanism, making it easier to rotate the turntable 3, so that the zipper roll 23 can release the zipper 22 smoothly and with constant tension.

[0029] In this technical solution, the turntable 3 is rotated by a power mechanism, which makes the turntable 3 rotate at a uniform speed. This also helps to control the zipper roll 23 to release the zipper 22 smoothly and with constant tension. This helps to control the length of the cut zipper 22 and ensure that the length of each cut zipper 22 is basically consistent. This is not only beneficial to the subsequent production and processing of mattresses and other products, but also helps to improve the utilization rate of the zipper 22 and reduce costs.

[0030] In practical applications, the leveling mechanism includes a base 5, a first positioning mechanism 6, a flattening mechanism 7, and a second positioning mechanism 8 arranged sequentially on the base 5 along the forward direction of the zipper 22. The first positioning mechanism 6 is used to flatten, position, and guide the zipper 22. The flattening mechanism 7 is used to press the zipper 22 onto the table surface 14 of the base 5 to support the lower part of the zipper 22. The second positioning mechanism 8 ensures accurate positioning of the zipper 22 and allows the zipper 22 to move stably against the table surface 14.

[0031] In this technical solution, the flattening mechanism ensures that the zipper 22 remains flat during the transmission of the cutting blade, which not only improves cutting accuracy but also facilitates flat cutting, making it easier to use the zipper 22 for subsequent production and processing, and promoting efficient subsequent work.

[0032] In practical applications, the flattening mechanism 7 includes a pressing plate 9 pivotally connected to the base 5 at both ends. The front end and thickness of the pressing plate 9 have an upward-curved portion 10. The upward-curved portion 10 makes the zipper 22 inlet end and the zipper 22 outlet end of the pressing plate 9 smooth parts, which is used to prevent hooking and scratching the zipper 22.

[0033] In this technical solution, the zipper 22 passes through the gap between the pressure plate 9 and the base 5, so that the zipper 22 remains flat during the transmission process, avoiding rolling or twisting, and ensuring that the front and back of the zipper 22 are always consistent, thereby improving cutting efficiency.

[0034] In practical applications, the pressure plate 9 is long and narrow, spanning the base 5 in the width direction, so that multiple zippers 22 can pass under the pressure plate 9 at the same time and be flattened by the pressure plate 9 simultaneously, ensuring flatness and avoiding curling or twisting. This facilitates the simultaneous cutting of multiple zippers 22, thereby simplifying the structure.

[0035] In practical applications, the first positioning mechanism 6 includes a pivot 11 with both ends pivotally connected to the base 5, and a plurality of positioning pieces 12 disposed on the pivot 11. The width of the positioning piece 12 is adapted to the width of the fabric piece on the zipper 22, and the spacing between adjacent positioning pieces 12 is adapted to the width of the chain teeth on the zipper 22. Two adjacent positioning pieces 12 are used to press on two fabric pieces on a zipper 22 respectively to prevent the zipper 22 from twisting during transmission.

[0036] In this technical solution, several positioning pieces 12 are set to facilitate the simultaneous entry of multiple zippers 22 into the cutting mechanism 2 for cutting, thereby improving cutting efficiency.

[0037] In practical applications, to avoid interference between adjacent zippers 22, at least one positioning piece 12 is placed between adjacent zippers 22 to form an interval.

[0038] In practical applications, the second positioning mechanism 8 includes several positioning blocks 13 spaced apart on the base 5. The spacing between adjacent positioning blocks 13 is adjustable. It is used to press two pieces of fabric onto the chain to fit the size of the zipper 22, so that the zipper 22 fits the table surface 14 for precise cutting.

[0039] In this technical solution, the positioning block 13 helps to further ensure the anti-rolling, anti-twisting, and anti-displacement effects of the zipper 22, so that the zipper 22 always enters the cutting mechanism 2 in a proper position for cutting, thereby improving the cutting accuracy.

[0040] In this technical solution, the positioning piece 12 is rotatably limited at one end by a pivot 11, and the other end can be flipped up and down by the movement of the zipper 22, which facilitates the efficient and flattening of the zipper 22. The positioning piece 12 is block-shaped, and the spacing between the positioning block 13 and the surface of the base 5 is adjusted according to the thickness of the fabric on the zipper 22. When the zipper 22 passes through the positioning block 13, the positioning block 13 remains stationary, which is conducive to the efficient and accurate cutting of the subsequent cutting scissors 18.

[0041] In practical applications, a roller 15 is also provided between the second positioning mechanism 8 and the cutting mechanism 2. The roller 15 rotates and drives the zipper 22 to move toward the cutting mechanism 2, so that the zipper 22 moves with constant tension and is prevented from stretching or stacking.

[0042] In this technical solution, there is a certain pressure between the roller 15 and the zipper 22. As the roller 15 rolls, friction is generated between it and the zipper 22. The friction drives the zipper 22 to move into the cutting mechanism 2. This helps to control the moving speed and displacement of the zipper 22, thereby helping to control the cutting mechanism 2 to accurately cut the zipper 22 and ensure that the length of the cut zipper 22 has a certain accuracy.

[0043] In practical applications, the zipper cutting machine also includes a dotting mechanism 16, which is located between the flattening mechanism and the cutting mechanism 2. The dotting device 17 on the dotting mechanism 16 is used to mark dots on the zipper 22. The dotting device 17 is located in front of the cutting scissors 18 of the cutting mechanism 2.

[0044] In this technical solution, the dotting mechanism 16 is used to mark dots on the zipper 22, so that when the zipper 22 is used for processing actual products, the operating function can observe the dotting marks in time and perform corresponding actions (such as when one side of the mattress is sewn, it needs to be turned to sew the other side). This makes it easier for operators to make corresponding actions in time, thereby improving the efficiency and quality of subsequent processing.

[0045] In practical applications, the zipper cutting machine also includes several sets of tension buffer mechanisms 19. The tension buffer mechanisms 19 are arranged between the flattening mechanism and the unwinding mechanism 1. The tension buffer mechanisms 19 are used to buffer and guide the zipper 22, prevent the zipper 22 from winding, and facilitate the appropriate lengthening of the zipper 22's stroke. This helps the zipper 22 to always maintain a flat state and appropriate tension, which in turn improves the flattening effect of the subsequent flattening mechanism. Ultimately, it ensures that the zipper 22 enters the cutting mechanism 2 with constant tension and flatness for cutting.

[0046] In this embodiment, two sets of unwinding mechanisms 1 are arranged facing each other. Preferably, there are four positioning pieces 12, with two positioning pieces 12 at each end cooperating to position one zipper 22. Two sets of tension buffering mechanisms 19 are arranged adjacently, and the two sets of tension buffering mechanisms 19 are set on the same base 5. When two zippers 22 pass through different tension buffering mechanisms 19 and different positioning pieces 12 at the same time, the two sets of tension buffering mechanisms 19 are independent of each other, and the space between the two rows of positioning pieces 12 in the middle is empty. This avoids mutual interference when two adjacent zippers 22 are cut at the same time, making them independent and conducive to efficient simultaneous cutting of two zippers 22, which helps to ensure cutting efficiency.

[0047] In practical applications, the tension buffer mechanism 19 includes a height-adjustable U-shaped support block 20 and a guide roller 21 spaced apart from and positioned above the support block 20. The gap between the support block 20 and the guide roller 21 forms a zipper passageway. The inner width of the support block 20 is adapted to the width of the zipper 22, ensuring the zipper 22 moves smoothly under constant tension. The gap between the support block 20 and the guide roller 21 forms the zipper passageway, preventing the zipper 22 from twisting during transport, thus ensuring the zipper 22 passes smoothly and maintains its flatness.

[0048] In this technical solution, the base 5 for the tension buffer mechanism 19 and the base 5 for the unwinding mechanism 1 are the same base 5. Four vertical guide rods 24 are provided on the base 5 of the tension buffer mechanism 19, and a U-shaped support block 20 is provided on two adjacent vertical guide rods 24, and can be moved up and down along the guide rods 24 to adjust its position.

[0049] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Various modifications and variations can be made to the above embodiments. 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 zipper cutting machine, comprising an unwinding mechanism (1) and a cutting mechanism (2), wherein the unwinding mechanism (1) comprises an unwinding structure and a power mechanism for driving the unwinding structure to rotate, characterized in that... It also includes a leveling mechanism disposed between the unwinding mechanism (1) and the cutting mechanism (2). The unwinding mechanism (1) is used to keep the zipper roll (23) under constant tension and release the zipper (22) smoothly. The leveling mechanism is used to keep the released zipper (22) flat and prevent it from twisting. The cutting mechanism (2) is used to cut the released zipper (22).

2. The zipper cutting machine according to claim 1, characterized in that... The unwinding structure includes a vertically upward tilted turntable (3) that cooperates with the power mechanism, and an upwardly protruding tilted winding structure (4) on the turntable (3). The winding structure (4) is inserted into the cavity of the zipper roll (23) to limit and support the zipper roll (23) on the turntable (3). The power mechanism is used to rotate the turntable (3). The turntable (3) drives the winding structure (4) to rotate synchronously, so that the zipper roll (23) rotates synchronously with the turntable (3) and the winding structure (4) to release the zipper (22).

3. The zipper cutting machine according to claim 1, characterized in that... The leveling mechanism includes a base (5), a first positioning mechanism (6), a flattening mechanism (7), and a second positioning mechanism (8) arranged sequentially on the base (5) along the forward direction of the zipper (22). The first positioning mechanism (6) is used to flatten, position, and guide the zipper (22). The flattening mechanism (7) is used to press the zipper (22) onto the table surface (14) of the base (5) to support the lower part of the zipper (22). The second positioning mechanism (8) ensures that the zipper (22) is accurately positioned and that the zipper (22) moves stably against the table surface (14).

4. The zipper cutting machine according to claim 3, characterized in that... The flattening mechanism (7) includes a pressure plate (9) pivotally connected at both ends to the base (5). The front end and thickness of the pressure plate (9) have an upturned portion (10). The upturned portion (10) makes the zipper inlet (22) end and zipper outlet (22) end of the pressure plate (9) smooth, which is used to prevent the zipper (22) from being hooked and scratched.

5. The zipper cutting machine according to claim 3, characterized in that... The first positioning mechanism (6) includes a pivot (11) with both ends pivotally connected to the base (5), and a plurality of positioning pieces (12) disposed on the pivot (11). The width of the positioning piece (12) is adapted to the width of the fabric piece on the zipper (22), and the spacing between adjacent positioning pieces (12) is adapted to the width of the chain teeth on the zipper (22). Two adjacent positioning pieces (12) are used to press on two fabric pieces on a zipper (22) respectively to prevent the zipper (22) from twisting during transmission.

6. The zipper cutting machine according to claim 3, characterized in that... The second positioning mechanism (8) includes several positioning blocks (13) spaced apart on the base (5). The spacing between adjacent positioning blocks (13) is adjustable. The two pieces of fabric are pressed onto the chain to fit the zipper size, so that the zipper (22) fits the table surface (14) for precise cutting.

7. The zipper cutting machine according to claim 6, characterized in that... A roller (15) is provided between the second positioning mechanism (8) and the cutting mechanism (2). The roller (15) rotates and drives the zipper (22) to move toward the cutting mechanism (2), so that the zipper (22) moves under constant tension, preventing stretching or stacking.

8. The zipper cutting machine according to any one of claims 1-7, characterized in that... It also includes a dotting mechanism (16), which is located between the flattening mechanism and the cutting mechanism (2). The dotting device (17) on the dotting mechanism (16) is used to mark dots on the zipper (22). The dotting device (17) is located in front of the cutting scissors (18) of the cutting mechanism (2).

9. The zipper cutting machine according to any one of claims 1-7, characterized in that... It also includes several sets of tension buffer mechanisms (19), which are disposed between the leveling mechanism and the unwinding mechanism (1). The tension buffer mechanism (19) is used to buffer and guide the zipper (22) and to prevent the zipper (22) from winding.

10. The zipper cutting machine according to claim 9, characterized in that... The tension buffer mechanism (19) includes a height-adjustable U-shaped support block (20) and a guide roller (21) spaced apart from and positioned above the support block (20). The gap between the support block (20) and the guide roller (21) is a through channel for the zipper (22). The inner width of the support block (20) is adapted to the width of the zipper (22) to make the zipper (22) move smoothly with constant tension.

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