A device and method for simultaneous pulling and cutting of a hook-and-loop fastener

Abstract

The present application relates to the technical field of hook and loop fastener processing, in particular to a synchronous traction cutting device and method for hook and loop fastener, comprising a feeding table, a feeding mechanism, a front traction device, a guide mechanism, a traction cutting mechanism and a separation structure arranged on the feeding table in sequence. The guide mechanism forms an adjustable passing gap through left and right guide strips, and the traction cutting mechanism comprises a slitting turntable driven by a driving motor, and the slitting turntable is provided with a cutting module in the circumferential direction. The cutting knife of the cutting module is provided with traction plates on both sides. When the pre-traction and guided material belt reaches the cutting traction mechanism, the slitting turntable rotates, the traction plates press and traction the material belt, and the cutting knife cuts the material belt. The separation structure automatically separates and collects finished products and waste through a falling gap combined with an inclined grid plate and a vibration separation mechanism. The present application solves the problems of waste traction failure and low separation efficiency in the prior art, and improves the product production efficiency and size accuracy in specific working conditions.

Description

Technical Field

[0001] This invention relates to the field of hook and loop fastener processing technology, specifically to a synchronous traction cutting device and method for hook and loop fasteners. Background Technology

[0002] Hook and loop fasteners are widely used in clothing, bags, medical, automotive and other fields as connecting accessories. In their production process, cutting and slitting are key steps that determine product precision and production efficiency. This process requires cutting the woven, long strips of hook and loop fastener raw material into products of a predetermined size, and effectively separating the finished products from the cutting waste to complete subsequent processing or for direct shipment.

[0003] In traditional hook and loop fastener cutting processes, long strips of material are typically cut using cutting mechanisms such as punching, laser cutting, or rotary knives. The cut products and waste materials are then collected together, requiring manual separation. This process is not only labor-intensive and inefficient but also prone to product damage due to human error, affecting product yield. To address this issue, automated cutting and separation equipment has emerged in the industry. For example, the hook and loop fastener synchronous traction cutting device disclosed in Chinese Utility Model Patent No. CN220784161U uses a punching device and a separating device sequentially arranged along the material conveyor path. The punching device creates punching marks on the material, while the separating device uses a conveyor belt assembly (including an adsorption unit) to adsorb the product and the adhesive ring on the roll roller to adsorb the waste. Combined with a waste collection assembly, this achieves automatic separation of the product and waste, effectively saving labor costs and improving separation efficiency.

[0004] However, the cutting action and the strip traction drive action of this device are completed by independent components: the punching device is responsible for cutting and shaping the strip, while the continuous forward movement of the strip depends on the adhesion and traction of the waste material by the roll roller and the coordinated pulling of the conveyor belt assembly. When the strip width is exactly the same as the product width, the waste material consists of small, discrete pieces of waste material between the hook and loop fasteners of adjacent products, and it is impossible to traction the raw material roll by pulling the waste material. Summary of the Invention

[0005] This invention provides a synchronous traction cutting device for hook and loop fasteners to solve the problem of traction failure when waste material is discontinuous in the prior art.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A synchronous traction cutting device for hook and loop fasteners includes a feeding platform. A feeding mechanism, a guiding mechanism, and a traction cutting mechanism are sequentially arranged on the feeding platform along the conveying direction of the material belt. The guiding mechanism includes a left guide bar and a right guide bar arranged parallel to the material belt's travel direction, forming a guiding gap between them for the material belt to pass through. The traction cutting mechanism includes a cutting bracket on the feeding platform, a slitting turntable mounted on the cutting bracket, and a drive motor for driving the slitting turntable to rotate. Several cutting modules are detachably arranged along the circumference of the slitting turntable. Each cutting module includes a cutter holder and a cutter detachably mounted on the cutter holder. The cutter holder has traction plates on both sides of the cutter. One end of the traction plate near the feeding platform has an arc-shaped traction surface concentric with the slitting turntable. A pressure reset structure is provided between the traction plate and the cutter holder. The discharge end of the feeding platform has a separation structure for receiving and separating the finished product and waste material cut by the traction cutting mechanism.

[0008] By adopting the above technical solution, the traction and cutting functions of the material strip are integrated on a rotating slitting turntable, achieving synchronization between cutting and traction. A drive motor provides a single power source, rotating the slitting turntable and the cutting module mounted on it. When the cutting module rotates to contact the material strip, the traction plate on the front side of its cutter first presses the material strip with its arc-shaped traction surface. The traction plate moves towards the axis of the slitting turntable, and the pressure adjustment structure continuously provides pressure to reset the traction plate, pressing the material strip. The slitting turntable continues to rotate, and the traction plate drives the material strip forward (this arc surface can be equipped with anti-slip patterns to enhance friction and prevent slippage). Subsequently, the cutter passes over to perform the cutting action. At the instant the cutting is completed, the traction plate on the rear side of the cutter immediately presses and pulls the subsequent material strip, achieving absolute synchronization between traction and cutting in terms of timing and power source. This fundamentally eliminates the cutting position deviation caused by the mismatch of the actions of two independent drive components, significantly improving the dimensional accuracy of the product. Furthermore, the traction force acts directly on the main body of the strip to be cut, rather than relying on the waste generated after cutting. It provides effective traction when the product width matches the strip width and the waste is in discrete fragments. To process strips of different shapes, simply install the corresponding shaped cutter on the cutter holder. After cutting, the finished product and waste enter the separation structure together for separation. This technical solution replaces the intermittent "traction-stop-cutting" mode with continuous rotary traction, making the strip transport more stable and continuous, and helping to improve overall cutting efficiency and operational smoothness.

[0009] The above technical solution can be further configured as follows: the cutter seat is provided with a traction plate groove for mounting the traction plate, the traction plate is installed in the traction plate groove, the opening of the traction plate groove is provided with a first limiting stop extending into the traction plate groove, the bottom of the traction plate is provided with a second limiting stop, the pressure reset structure includes a first mounting hole provided in the traction plate groove, a second mounting hole provided at the bottom of the first limiting stop, and an elastic reset member, one end of the elastic reset member is installed in the first mounting hole, the other end is installed in the second mounting hole, and the elastic reset member pre-presses the first limiting stop onto the second limiting stop.

[0010] By adopting the above technical solution, the clamping force provided by the elastic reset component enables the traction plate to adapt to material strips of different thicknesses or materials, and enables the traction plate to provide effective traction. It prioritizes the use of durable and stable elastic components such as springs, and the traction plate has anti-drop and self-resetting functions: the cooperation of the first limit stop and the second limit stop prevents the traction plate from falling out of the traction plate groove. The elastic reset component enables the traction plate to have a continuous automatic reset tendency after the first and second limit stops are separated due to the compression of the material strip, and maintains continuous contact between the traction plate and the material strip. The pressure reset structure is integrated into the cutter seat, reducing external parts, reducing the risk of interference, and improving the rigidity and stability of the overall structure.

[0011] The above technical solution can be further configured as follows: it also includes a front traction device disposed between the feeding mechanism and the traction cutting mechanism. The front traction device includes a first motor slot disposed on the feeding platform and a second motor slot disposed on the left guide bar. A first traction motor is installed in the first motor slot and a second traction motor is installed in the second motor slot. A first traction roller is installed on the output shaft of the first traction motor and a second traction roller is installed on the output shaft of the second traction motor. A traction gap is formed between the first traction roller and the second traction roller for the feeding belt to pass through.

[0012] By adopting the above technical solution, pre-traction is performed on the material strip before it enters the traction and cutting mechanism. This controls the tension and travel posture of the material strip, preventing it from becoming loose, wrinkled, flipped, or folded. This ensures that the material strip entering the traction and cutting mechanism maintains the optimal posture and improves cutting accuracy. By using dual motors to drive dual rollers to pre-traction the material strip, the traction pressure of the traction and cutting mechanism is reduced. This prevents the material strip on the hook and loop fastener from becoming too sticky, which could lead to insufficient power in the traction and cutting mechanism and avoid traction failure.

[0013] The above technical solution can be further configured as follows: the slitting turntable includes an inner turntable and an outer turntable arranged coaxially, the outer wall surface of the inner turntable is provided with an outer limiting stop, the inner wall surface of the outer turntable is provided with an inner limiting stop, the outer limiting stop and the inner limiting stop cooperate with each other to prevent the inner and outer turntables from axially separating, the axial relative position of the inner turntable and the outer turntable is adjustable, the inner mounting plate and the outer mounting plate are respectively provided on the opposing sides of the inner turntable and the outer turntable, and the cutter seat of the cutting module is clamped and fixed between the inner mounting plate and the outer mounting plate.

[0014] The above technical solution employs a coaxial nested combination of inner and outer turntables. The outer limiting stop of the inner turntable's outer wall interlocks with the inner limiting stop of the outer turntable's inner wall, forming an axial anti-separation mechanical interlock. Crucially, the axial relative position of the inner and outer turntables can be adjusted to accommodate the installation, fastening, and replacement of cutting modules of various widths. During installation, simply place the cutting module's cutter holder between the inner and outer mounting plates, then adjust the inner and outer turntables to move them towards each other, and finally connect the three components using bolts, nuts, and other fasteners to complete the installation and fixation. When it is necessary to replace the cutting modules with different specifications (such as different cutter spacing or types), the width of the inner and outer turntables can be changed by loosening the fastening structure to adapt to them, achieving relatively quick installation. Through modular and adjustable clamping and fixing methods, the machine adjustment and tooling change time during product changeover can be shortened, improving the production flexibility of the equipment and meeting the production needs of multiple varieties and small batches. At the same time, it ensures the coaxiality and radial position accuracy of all cutting modules on the turntable, thereby ensuring the cutting quality.

[0015] The above technical solution can be further configured as follows: the left guide bar is fixedly mounted on the feeding table, and the right guide bar is connected to a bandwidth adjustment structure that drives the right guide bar to move along a direction perpendicular to the material belt. The bandwidth adjustment structure includes an adjustment motor, an adjustment screw connected to the adjustment motor, and a sliding member that cooperates with the adjustment screw. The sliding member is fixedly connected to the right guide bar.

[0016] By employing the above technical solution, a dynamically adjustable guide gap mechanism can accommodate the processing of strips of varying widths. The left guide bar is fixed as a reference, while the right guide bar is connected to a bandwidth adjustment structure consisting of an adjusting motor, adjusting screw, and sliding components. The adjusting motor drives the adjusting screw to rotate, which in turn converts into precise linear motion of the sliding components perpendicular to the strip's travel direction. This causes the right guide bar to move synchronously, changing the gap width between it and the fixed left guide bar. This technical solution achieves automated adjustment of the guide gap. Operators can input the target strip width value through the control system, and the adjusting motor automatically drives the right guide bar to the corresponding position, eliminating the need for manual measurement and wrench operation. The adjustment speed is fast, the accuracy is high, and the repeatability is excellent. This prevents strips of different widths from deviating during transport, ensuring complete cutting and reducing downtime for adjustments due to product specification changes.

[0017] The above technical solution can be further configured as follows: the drive motor includes a drive shaft, the drive shaft is provided with an annular shoulder, the drive shaft is fitted with a first limiting pad and a first limiting member, one side of the slitting turntable abuts against the shoulder, the other side of the slitting turntable abuts against the first limiting pad, and the outer side of the first limiting pad abuts against the first limiting member.

[0018] The above technical solution employs a mechanical locking and fixing mechanism comprised of a shaft shoulder, a first limiting washer, and a first limiting member. This solution enables rapid, accurate positioning and secure fixing of the slitting turntable on the drive shaft. The shaft shoulder, serving as an axial positioning reference surface, provides a fixed starting position for the slitting turntable, ensuring repeatability and positioning accuracy during installation. The first limiting washer, acting as a buffer and stress-dispersing component, is placed between the other side of the slitting turntable and the first limiting member. It evenly transmits the locking force of the limiting member to the turntable end face, preventing excessive local stress from damaging the turntable. The limiting washer is preferably selected to prevent loosening under vibration conditions. Finally, tightening the first limiting member firmly presses the slitting turntable against the shaft shoulder, eliminating the possibility of axial movement. This fixing method features a simple structure, convenient assembly and disassembly, and maintenance or replacement can be completed using only common tools. Relying on a purely mechanical connection without reliance on electrical or complex hydraulic / pneumatic components, it offers high reliability and stable power transmission. In this technical solution, the linkage between the slitting turntable and the drive shaft can be achieved by selecting key connection, pin connection, or other connection methods to realize synchronous rotation of the two.

[0019] The above technical solution can be further configured as follows: the separation structure includes a feeding auxiliary platform disposed at the discharge end of the feeding platform, a material dropping gap is formed between the feeding platform and the feeding auxiliary platform, the feeding auxiliary platform includes a feeding inclined surface disposed at an incline, and a finished product box is disposed at the end of the feeding inclined surface; a waste box is disposed below the material dropping gap.

[0020] The above technical solution constitutes a multi-stage automatic sorting system based on a combination of gravity, size screening, and vibration separation. This system first utilizes the inherent differences in physical size and shape between finished products (complete hook and loop fastener strips) and waste materials (small fragments or scraps) for initial separation. The cut mixture is pushed to the end of the feeding platform. Larger, structurally continuous finished products can cross the drop gap between the feeding platform and the auxiliary feeding platform, smoothly reaching the top of the slightly lower vertical feeding ramp, and then sliding down the ramp into the finished product box under gravity for collection. Waste materials smaller than the drop gap width, as well as a very small number of finished products that accidentally get stuck at the edge of the gap, fall directly through the gap.

[0021] The above technical solution can be further configured as follows: a grid plate is provided above the waste box, and a vibration separation mechanism is connected to the lower side of the grid plate. The vibration separation mechanism includes a vibration motor, a second drive shaft driven by the vibration motor, and a cam provided on the second drive shaft. The grid plate is inclinedly arranged above the waste box with its lower end facing the finished product box, and the outline of the cam contacts the lower side of the grid plate.

[0022] Using the above technical solution, the falling material does not directly enter the waste box, but first falls onto an inclined grid plate. The gap design of the grid plate allows finer waste to fall directly, while a very small number of finished products that may be mixed in are intercepted on the grid plate surface because their size is much larger than the grid gaps. This design achieves initial screening of waste and interception of accidentally fallen finished products, and achieves secondary separation of the two through a vibration separation structure. The working principle of the vibration separation structure is as follows: After the vibration motor starts, it drives the second drive shaft and the cam on it to rotate. As a non-circular mechanical component, when the cam's convex part rotates to contact the lower side of the grid plate, it applies an upward pushing force to the grid plate; when the concave part of the cam rotates to the contact position, this pushing force disappears or decreases, and the grid plate falls back under its own gravity. The continuous rotation of the cam makes this pushing-falling action occur periodically, thus converting the rotational motion of the motor into a continuous, regular intermittent knocking or lifting of the grid plate, forming mechanical vibration. The vibration transmitted to the grid plate utilizes the differences in mass, shape, and coefficient of friction between the waste fragments and the finished strips and the grid plate surface. Lighter, smaller waste fragments are more easily lifted, moved, and fall through the grid gaps into the waste box below. Conversely, the relatively larger, flatter finished strips are less likely to flip or change shape during smaller vibrations, and therefore tend to slide gradually downwards along the inclined grid plate surface, eventually falling into the finished product box. This mechanism is simple in structure, transmits power directly, and the vibration frequency and amplitude can be adjusted by changing the motor speed and cam shape, resulting in stable and reliable separation.

[0023] The above technical solution can be further configured as follows: the feeding mechanism includes a feeding bracket, the feeding bracket is equipped with a feeding shaft arranged perpendicular to the material belt traveling direction, and the feeding shaft is sequentially fitted with a sleeve for installing the feeding belt, a second limiting gasket for axially limiting the sleeve, and a second limiting member.

[0024] The above technical solution provides a simple, stable, and highly adaptable method for installing and supporting strip rolls. By horizontally mounting the feeding shaft on the feeding bracket and installing a sleeve, the strip roll is fitted onto the sleeve. A combination of a second limiting washer and a second limiting member forms an axial limiting mechanism for the sleeve and the strip roll. After installing the strip roll, the second limiting washer is fitted onto the outside of the sleeve and the second limiting member is tightened, firmly securing the sleeve to the feeding shaft and preventing the strip roll from axially detaching. The sleeve width is slightly larger than the strip roll width, allowing the strip roll to rotate smoothly and release the strip. This mechanical limiting method allows for quick installation and disassembly without special tools, facilitating rapid strip roll replacement by operators, improving production preparation efficiency, and offering low structural cost and high reliability.

[0025] A method for synchronous traction cutting of hook and loop fasteners, employing a synchronous traction cutting device for hook and loop fasteners, includes the following steps:

[0026] S1: The feeding mechanism releases the material belt. After being pre-pulled by the front traction device, the material belt enters the guide gap formed by the left guide bar and the right guide bar. The front end of the material belt is guided to the bottom of the slitting turntable of the traction cutting mechanism.

[0027] S2: The drive motor drives the slitting turntable to rotate. When the cutting module rotates to contact the material strip, the traction plate on the front side of the cutter first presses the material strip with the traction surface and provides traction force. Then the cutter cuts the material strip. At the same time, the traction surface of the traction plate on the rear side of the cutter presses and pulls the subsequent material strip.

[0028] S3: The subsequent material belt pushes the finished product and waste generated after cutting into the separation structure together;

[0029] S4: The finished product arrives at the feeding ramp and slides into the finished product box along the feeding ramp. The waste and a small amount of mixed finished products fall onto the grid plate through the material drop gap.

[0030] S5: After the material on the grid plate is separated by the vibration separation mechanism, the waste material falls into the waste box, and the finished product slides down the inclined grid plate into the finished product box.

[0031] The present invention has at least the following beneficial effects:

[0032] 1. The traction and cutting functions are integrated into the same rotating cutting module, driven by a single drive motor via a slitting turntable, achieving absolute synchronization of traction and cutting actions in terms of timing and power source. 2. The traction force acts directly on the main body of the strip to be cut, rather than relying on the waste edges generated after cutting. 3. Rotary continuous traction cutting replaces the traditional intermittent "traction-stop-cutting" cycle, avoiding the accumulation of errors caused by repeated stops waiting for cutting. 4. A two-stage separation structure enables basic and secondary separation of finished products and waste materials, resulting in significant separation effects. 5. It can quickly adapt to the processing of hook and loop fastener rolls of different widths.

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the synchronous traction and cutting device for hook and loop fasteners according to an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the exploded structure of an embodiment of the present invention;

[0036] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure in the CC direction;

[0037] Figure 4 This is an exploded view of the slitting turntable and cutting module accessories according to an embodiment of the present invention;

[0038] Figure 5 This is an exploded view of the cutting module according to an embodiment of the present invention;

[0039] Figure 6 This is a cross-sectional view of the cutting module according to an embodiment of the present invention;

[0040] Figure 7 This is a partially enlarged schematic diagram of the separation structure according to an embodiment of the present invention;

[0041] Figure 8 This is a partially enlarged schematic diagram of the vibration separation mechanism according to an embodiment of the present invention;

[0042] Figure 9 This is a schematic diagram of the first working state of the cutting module in an embodiment of the present invention;

[0043] Figure 10 This is a schematic diagram of the second working state of the cutting module in an embodiment of the present invention.

[0044] Figure 11 This is a schematic diagram of the third working state of the cutting module in an embodiment of the present invention.

[0045] Label annotations: 1. Feeding table; 2. Unloading mechanism; 21. Unloading bracket; 22. Unloading shaft; 23. Sleeve; 24. Second limiting washer; 25. Second limiting component; 3. Guide mechanism; 31. Left guide bar; 32. Right guide bar; 33. Bandwidth adjustment structure; 33. Adjusting motor; 331. Adjusting screw; 332. Sliding component; 333. Front traction device; 4. First motor slot; 41. Second motor slot; 42. First traction motor; 43. First traction roller; 44. Second traction motor; 45. Second traction roller; 46. Traction cutting mechanism; 5. Cutting bracket; 51. Drive motor; 52. Drive shaft; 521. Shoulder; 522. First limiting washer; 523. First limiting component; 524. Slitting turntable; 5 3. Inner turntable 531, outer turntable 532, outer limit stop 533, inner limit stop 534, inner mounting plate 535, outer mounting plate 536, cutting module 54, cutter holder 541, cutter 542, traction plate 543, traction surface 5431, traction plate groove 544, first limit stop 545, second limit stop 546, first mounting hole 547, second mounting hole 548, pressure reset structure 549, separation structure 6, feeding auxiliary platform 61, feeding inclined surface 611, finished product box 612, material drop gap 62, waste box 63, grid plate 64, vibration separation mechanism 65, vibration motor 651, second drive shaft 652, cam 653. Detailed Implementation

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] like Figure 1-8 As shown, the hook and loop fastener synchronous traction cutting device of the present invention includes at least the following technical solutions:

[0048] A synchronous traction cutting device for hook and loop fasteners includes a feeding platform 1, on which a feeding mechanism 2, a guiding mechanism 3, a front traction device 4, a traction cutting mechanism 5, and a separation structure 6 are arranged sequentially along the conveying direction of the material belt.

[0049] The feeding mechanism 2 includes a feeding bracket 21 fixed on the feeding table 1. A feeding shaft 22 perpendicular to the direction of material conveyor travel is horizontally mounted on the feeding bracket 21. A sleeve 23 for mounting the material conveyor roll, a second limiting washer 24 for axially limiting the sleeve 23, and a second limiting member 25 are sequentially fitted onto the feeding shaft 22. After the second limiting member 25 is tightened, the sleeve 23 and the material conveyor roll are axially pressed and fixed onto the feeding shaft 22 by the second limiting washer 24 to prevent axial movement.

[0050] The guiding mechanism 3 is located behind the feeding mechanism 2. It includes a left guide bar 31 and a right guide bar 32 arranged parallel to the material belt's travel direction, forming a guiding gap between them for the material belt to pass through. The left guide bar 31 is fixed to the feeding table 1. The right guide bar 32 is connected to a bandwidth adjustment structure 33, which works as follows: the adjusting motor 331 drives the adjusting screw 332 to rotate, causing the sliding member 333 cooperating with the adjusting screw 332 to move linearly, thereby driving the right guide bar 32 to move perpendicular to the material belt's travel direction, so as to precisely adjust the width of the guiding gap to adapt to material belts of different widths.

[0051] The front traction device 4 is positioned before the traction and cutting mechanism 5 and is used for pre-traction of the material strip. It includes a first motor slot 41 on the feeding table 1 and a second motor slot 42 on the left guide bar 31. A first traction motor 43 is installed in the first motor slot 41, and a first traction roller 44 is mounted on its output shaft. A second traction motor 45 is installed in the second motor slot 42, and a second traction roller 46 is mounted on its output shaft. A traction gap is formed between the first traction roller 44 and the second traction roller 46, allowing the material strip to pass through. The first traction motor 43 and the second traction motor 45 operate synchronously, providing a stable pre-traction force to the material strip passing through the guide gap, maintaining the tension and stability of the material strip.

[0052] The traction cutting mechanism 5 includes a cutting bracket 51 mounted on the feeding table 1. A slitting turntable 53 is mounted on the cutting bracket 51 via a drive motor 52. The drive motor 52 includes a drive shaft 521 with an annular shoulder 522. The slitting turntable 53 is fitted onto the drive shaft 521, with one side abutting against the shoulder 522 and the other side abutting against a first limiting washer 523 and a first limiting member 524 in sequence. After the first limiting member 524 is tightened, the first limiting washer 523 axially presses and fixes the slitting turntable 53 onto the shoulder 522, achieving accurate positioning and reliable connection, and ensuring stable power transmission.

[0053] The slitting turntable 53 adopts a split design, including an inner turntable 531 and an outer turntable 532 coaxially nested. The outer wall of the inner turntable 531 is provided with an outer limiting flange 533, and the inner wall of the outer turntable 532 is provided with an inner limiting flange 534. The outer limiting flange 533 and the inner limiting flange 534 interlock to prevent axial separation of the inner turntable 531 and the outer turntable 532. Simultaneously, the relative axial position of the inner turntable 531 and the outer turntable 532 can be adjusted using fasteners. An inner mounting plate 535 and an outer mounting plate 536 are respectively fixedly installed on the opposing sides of the inner turntable 531 and the outer turntable 532.

[0054] A plurality of cutting modules 54 are detachably mounted along the circumference of the slitting turntable 53. Each cutting module 54 includes a cutter holder 541 and a cutter 542 detachably mounted on the cutter holder 541. During installation, the cutter holder 541 of the cutting module 54 is placed between the inner mounting plate 535 and the outer mounting plate 536. Then, fasteners such as bolts are sequentially passed through the inner mounting plate 535, the cutter holder 541, and the outer mounting plate 536 and tightened to clamp and fix the three components. By adjusting the relative positions of the inner and outer turntables 531 and 532, cutting modules 54 of different widths can be installed.

[0055] The cutter holder 541 has traction plates 543 on both sides of the cutter 542. The cutter holder 541 has a traction plate groove 544 for mounting the traction plates 543. The traction plates 543 are installed in the traction plate groove 544. A first limiting flange 545 extending into the groove is provided at the opening of the traction plate groove 544, while a second limiting flange 546 is provided at the bottom of the traction plates 543. A first mounting hole 547 is provided in the traction plate groove 544, and a second mounting hole 548 is provided at the bottom of the first limiting flange 545. A pressure reset structure 549, including an elastic reset member (a spring is used in this embodiment), is provided between the traction plates 543 and the cutter holder 541. One end of the elastic reset member is installed in the first mounting hole 547, and the other end is installed in the second mounting hole 548, thereby elastically pre-pressing the first limiting flange 545 onto the second limiting flange 546. Its working principle is as follows: When the traction plate 543 is subjected to external pressure, the second limit stop 546 can overcome the elastic force of the elastic reset member, causing the traction plate 543 to contract into the traction plate groove 544, compressing the elastic reset member. The elastic reset member has a tendency to recover, providing a clamping force to reset it.

[0056] The traction plate 543 has an arc-shaped traction surface 5431 at one end near the feeding table 1, which is coaxial with the slitting turntable 53, so as to better fit and press the material strip during rotation. The surface of the traction surface 5431 is provided with texture to increase friction.

[0057] A separation structure 6 is installed at the discharge end of the feeding platform 1 to receive and separate the cut finished product from the waste material. The separation structure 6 includes a secondary feeding platform 61 located at the discharge end of the feeding platform 1. A discharge gap 62 of a certain width is formed between the feeding platform 1 and the secondary feeding platform 61. The secondary feeding platform 61 includes a downwardly inclined feeding ramp 611, with a finished product box 612 located at its end. A waste box 63 is located directly below the discharge gap 62.

[0058] Above the waste container 63, a grid plate 64 is inclinedly arranged. The lower end of the grid plate 64 faces the finished product container 612. A vibration separation mechanism 65 is connected to the lower side of the grid plate 64. The vibration separation mechanism 65 includes a vibration motor 651, a second drive shaft 652 driven by the vibration motor 651, and a cam 653 disposed on the second drive shaft 652. The outline of the cam 653 keeps in contact with the lower side of the grid plate 64.

[0059] The working principle of this embodiment is as follows:

[0060] S1: The hook and loop fastener roll is installed on the sleeve 23 of the feeding mechanism 2, and the sleeve 23 and the roll are limited by the second limiting gasket 24 and the second limiting member 25. After the roll is pulled out, its front end passes through the traction gap between the first traction roller 44 and the second traction roller 46 of the front traction device 4, and is guided by the guide gap formed by the left guide bar 31 and the right guide bar 32 of the guide mechanism 3. Then the front traction device 4 is activated to pre-traction the roll, making it taut and move smoothly. The front end of the roll is guided to the bottom of the slitting turntable 53 of the traction cutting mechanism 5.

[0061] S2: Start the drive motor 52 to drive the slitting turntable 53 and its cutting module 54 to rotate at a constant speed. When the rotating cutting module 54 contacts the material strip, the traction plate 543 located in front of the cutter 542 first presses the material strip with its arc-shaped traction surface 5431 (e.g., Figure 9 (As shown). Under the action of the pressure reset structure 549, the traction plate 543 continuously provides pressure and applies a forward traction force to the material strip as the slitting turntable 53 rotates.

[0062] S3: Under the traction of the traction plate 543, after the material belt advances a certain distance, the cutter 542 rotates to the working position to cut the material belt (e.g., ...). Figure 10 As shown), the material strip is divided into finished products and waste materials of a preset shape. At the instant the cutting is completed, the traction plate 543 on the rear side of the cutter 542 immediately clamps and begins to pull the subsequent material strip (as shown). Figure 11 As shown in the diagram, this allows for continuous and synchronous traction and cutting. The subsequent material belt pushes the finished product and waste generated after cutting together towards the separation structure 6.

[0063] S4: The mixture of finished product and waste material is pushed to the end of the feeding platform 1. Larger, continuous finished products can cross the drop gap 62 between the feeding platform 1 and the feeding auxiliary platform 61, reach the feeding ramp 611, and slide into the finished product box 612 by gravity. Waste material smaller than the width of the drop gap 62, as well as a small amount of finished product material that may be mixed in, falls through the drop gap 62.

[0064] S5: The falling material lands on the inclined grid plate 64. The vibration separation mechanism 65 is activated, and the vibration motor 651 drives the cam 653 to rotate, periodically lifting the grid plate 64 to generate vibration. Under the action of vibration, fine waste materials can more easily fall through the gaps in the grid plate 64 into the waste box 63 below; while finished products larger than the grid gaps slide along the surface of the inclined grid plate 64 during vibration, and finally slide into the finished product box 612, achieving the final separation of finished products and waste materials.

[0065] The above-described embodiments are merely one implementation of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A synchronous traction cutting device for hook and loop fasteners, comprising a feeding table, wherein a feeding mechanism, a guiding mechanism, and a traction cutting mechanism are sequentially arranged on the feeding table along the conveying direction of the material belt, the guiding mechanism comprising a left guide bar and a right guide bar arranged parallel to the traveling direction of the material belt, forming a guiding gap between them for the material belt to pass through, characterized in that: The traction cutting mechanism includes a cutting bracket set on the feeding table, a slitting turntable mounted on the cutting bracket, and a drive motor that drives the slitting turntable to rotate. Several cutting modules are detachably arranged along the circumference of the slitting turntable. The cutting module includes a cutter holder and a cutter detachably mounted on the cutter holder. The cutter holder is provided with traction plates on both sides of the cutter. The end of the traction plate near the feeding table is provided with an arc-shaped traction surface concentric with the slitting turntable. A pressure reset structure is provided between the traction plate and the cutter holder. The feeding platform is equipped with a separation structure at the discharge end for receiving and separating the finished product and waste material after being cut by the traction cutting mechanism. It also includes a front traction device disposed between the feeding mechanism and the traction cutting mechanism. The front traction device includes a first motor slot disposed on the feeding platform and a second motor slot disposed on the left guide bar. A first traction motor is installed in the first motor slot and a second traction motor is installed in the second motor slot. A first traction roller is installed on the output shaft of the first traction motor and a second traction roller is installed on the output shaft of the second traction motor. A traction gap is formed between the first traction roller and the second traction roller to allow the feeding belt to pass through. The slitting turntable includes an inner turntable and an outer turntable arranged coaxially. The outer wall surface of the inner turntable is provided with an outer limiting stop, and the inner wall surface of the outer turntable is provided with an inner limiting stop. The outer limiting stop and the inner limiting stop cooperate with each other to prevent the inner and outer turntables from separating axially. The axial relative position of the inner and outer turntables is adjustable. An inner mounting plate and an outer mounting plate are respectively provided on the opposing sides of the inner and outer turntables. The cutter holder of the cutting module is clamped and fixed between the inner mounting plate and the outer mounting plate.

2. The synchronous traction cutting device for hook and loop fasteners according to claim 1, characterized in that: The cutter seat is provided with a traction plate groove for mounting the traction plate. The traction plate is installed in the traction plate groove. The opening of the traction plate groove is provided with a first limiting stop extending into the traction plate groove. The bottom of the traction plate is provided with a second limiting stop. The pressure reset structure includes a first mounting hole provided in the traction plate groove, a second mounting hole provided at the bottom of the first limiting stop, and an elastic reset member. One end of the elastic reset member is installed in the first mounting hole, and the other end is installed in the second mounting hole. The elastic reset member pre-presses the first limiting stop onto the second limiting stop.

3. The synchronous traction cutting device for hook and loop fasteners according to claim 2, characterized in that: The left guide bar is fixedly mounted on the feeding table, and the right guide bar is connected to a bandwidth adjustment structure that drives the right guide bar to move along a direction perpendicular to the material belt. The bandwidth adjustment structure includes an adjustment motor, an adjustment screw connected to the adjustment motor, and a sliding member that cooperates with the adjustment screw. The sliding member is fixedly connected to the right guide bar.

4. The synchronous traction cutting device for hook and loop fasteners according to claim 3, characterized in that: The drive motor includes a drive shaft with an annular shoulder. The drive shaft is fitted with a first limiting pad and a first limiting member. One side of the slitting turntable abuts against the shoulder, and the other side of the slitting turntable abuts against the first limiting pad. The outer side of the first limiting pad abuts against the first limiting member.

5. The synchronous traction cutting device for hook and loop fasteners according to claim 1, characterized in that: The separation structure includes a feeding auxiliary platform disposed at the discharge end of the feeding platform, and a material dropping gap is formed between the feeding platform and the feeding auxiliary platform. The feeding auxiliary platform includes a feeding inclined surface disposed at an incline, and a finished product box is disposed at the end of the feeding inclined surface. A waste box is disposed below the material dropping gap.

6. The synchronous traction cutting device for hook and loop fasteners according to claim 5, characterized in that: A grid plate is provided above the waste box, and a vibration separation mechanism is connected to the lower side of the grid plate. The vibration separation mechanism includes a vibration motor, a second drive shaft driven by the vibration motor, and a cam provided on the second drive shaft. The grid plate is inclined above the waste box and its lower end faces the finished product box. The outline of the cam contacts the lower side of the grid plate.

7. The synchronous traction cutting device for hook and loop fasteners according to claim 6, characterized in that: The feeding mechanism includes a feeding bracket, on which a feeding shaft is installed along a direction perpendicular to the material belt travel direction. The feeding shaft is sequentially fitted with a sleeve for installing the material belt, a second limiting gasket for axially limiting the sleeve, and a second limiting member.

8. A method for synchronous traction cutting of hook and loop fasteners, characterized in that: The method of using the hook and loop fastener synchronous traction cutting device according to any one of claims 1 to 7 includes the following steps: S1: The feeding mechanism releases the material belt. After being pre-pulled by the front traction device, the material belt enters the guide gap formed by the left guide bar and the right guide bar. The front end of the material belt is guided to the bottom of the slitting turntable of the traction cutting mechanism. S2: The drive motor drives the slitting turntable to rotate. When the cutting module rotates to contact the material strip, the traction plate on the front side of the cutter first presses the material strip with the traction surface and provides traction force. Then the cutter cuts the material strip. At the same time, the traction surface of the traction plate on the rear side of the cutter presses and pulls the subsequent material strip. S3: The subsequent material belt pushes the finished product and waste generated after cutting into the separation structure together; S4: The finished product arrives at the feeding ramp and slides into the finished product box along the feeding ramp. The waste and a small amount of mixed finished products fall onto the grid plate through the material drop gap. S5: After the material on the grid plate is separated by the vibration separation mechanism, the waste material falls into the waste box, and the finished product slides down the inclined grid plate into the finished product box.

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