A sealing machine unwinding mechanism

Abstract

The utility model provides a kind of unwinding mechanism of sealing machine, the technical field of equipment unwinding device, including equipment main body, still including: lifting assembly, unwinding shaft, plastic product, first guide roller, second guide roller, first limiting component and second limiting component, lifting assembly is set in equipment main body front side wall;Plastic product one end is adhered with unwinding shaft outer wall and is wound on unwinding shaft around setting.The utility model forms real-time constraint to plastic product by self-adapting limiting mechanism, offsets tension fluctuation, maintains constant linear velocity and realizes equidistance unwinding, improves cutting accuracy;The same power source is used to realize the coordinated work of plastic product output end and winding end limiting function, simplify structure and ensure dynamic cooperation;Mechanical stop positioning function of placing groove place guarantees that unwinding shaft and plastic product are stably operated under different rotational speeds, avoid component to separate, comprehensively improve the reliability, safety and finished product qualification rate of unwinding process.

Description

Technical Field

[0001] This utility model belongs to the technical field of unwinding equipment, specifically relating to an unwinding mechanism for a sealing machine. Background Technology

[0002] Rolls of plastic packaging products are tightly wound onto the main shaft of the unwinding equipment. The unwinding equipment ensures that the plastic packaging products are transported flat and without deviation, so as to smoothly connect with subsequent processing steps such as cutting and sealing, and ensure the efficient and continuous operation of the entire production process.

[0003] In related technology (Chinese Utility Model Patent No. CN206108508U), a film unwinding mechanism for a plastic bottle film sealing machine is disclosed, including an unwinding shaft and a friction braking mechanism. The unwinding shaft is symmetrically equipped with an unwinding baffle, a retaining ring, a film unwinding support frame, and the friction braking mechanism. The film unwinding support frame has an unwinding U-shaped block, and the unwinding shaft is mounted on the unwinding U-shaped block. The friction braking mechanism consists of a friction block fixing plate, a first friction connecting block, and a friction belt. The friction block fixing plate is mounted on the film unwinding support frame, and two first friction connecting blocks are connected to both ends of the friction belt. One of the two first friction connecting blocks is fixed to the friction block fixing plate by a fixing bolt, and the other first friction connecting block is connected to the friction block fixing plate by an adjusting screw. This unwinding mechanism for a plastic bottle film sealing machine effectively solves the inertia problem of the film roll when it rotates to a stop. The use of a spring structure makes the work more efficient. The friction belt uses wear-resistant red rubber for durability. The design of the positioning block allows for faster installation, disassembly, and replacement of the film roll, making it worthy of widespread promotion.

[0004] However, in existing unwinding equipment, due to the lack of an effective unwinding limiting mechanism, after the free end of the roll material has completed the cutting process, the remaining plastic packaging products wound on the unwinding shaft are prone to loosening and deviation due to the loss of tension constraint. This loose state will cause significant fluctuations in the tension of the roll material during the subsequent unwinding process, making it difficult to maintain a constant linear speed output. The resulting uneven unwinding and non-equidistant problems directly affect the cutting accuracy of plastic packaging products. Utility Model Content

[0005] To address the problem that existing unwinding equipment lacks a limiting mechanism, resulting in loose and misaligned plastic packaging products after the free end of the roll is cut, leading to large tension fluctuations during subsequent unwinding, inability to maintain a constant linear speed, uneven unwinding, and non-equidistant spacing, ultimately affecting the cutting accuracy of the plastic packaging products, this utility model provides an unwinding mechanism for a sealing machine equipped with an adaptive limiting mechanism. This mechanism, through elastic abutment or dynamic following structure, maintains a tight fit with the sidewall of the plastic product at all times, forming a real-time limiting constraint. Throughout the unwinding process, the limiting mechanism continuously applies uniform radial pressure to the plastic product, effectively offsetting tension fluctuations caused by changes in the roll diameter, ensuring that the plastic product wound on the unwinding shaft remains tightly wound, fundamentally eliminating cutting accuracy deviations caused by loose roll material. The specific technical solution is as follows:

[0006] A sealing machine's unwinding mechanism includes a main body and further comprises: a lifting component, an unwinding shaft, a plastic product, a first guide roller, a second guide roller, a first limiting component, and a second limiting component. The lifting component is disposed on the front side wall of the main body. One end of the plastic product is adhered to the outer wall of the unwinding shaft and wound around it, and the unwinding shaft is driven to rise and fall by the lifting component. The first guide roller is fixedly installed horizontally below the inner cavity of the main body. Multiple second guide rollers are provided, and the multiple second guide rollers are fixed horizontally and installed parallel to each other above the inner cavity of the main body. The other end of the plastic product is attached to the lower surface of the first guide roller and wound in a curved serpentine shape along the surfaces of the multiple second guide rollers. The first limiting component is disposed above the second guide roller and is used to limit the plastic product wound on the second guide roller. The second limiting component is disposed above the plastic product and is used to limit the plastic product wound on the unwinding shaft.

[0007] In the above technical solution, the first limiting component includes: a first connecting arm, a first connecting plate, a frame, a first mounting bracket, and a first roller. The first connecting arm is movably arranged in the vertical direction; the first connecting plate is fixed and vertically installed at the bottom end of the first connecting arm; four frames are provided, and the four frames are respectively installed at the four corners of the bottom end of the first connecting plate; the first mounting bracket is fixedly installed at the bottom end of the frame; the first roller is rotatably connected to the first mounting bracket, and the first roller abuts against the surface of the plastic product wound on the second guide roller.

[0008] In the above technical solution, each first mounting bracket has two first rollers rotatably mounted at its bottom end, and the two first rollers are symmetrically arranged relative to the bracket body.

[0009] In the above technical solution, the second limiting component includes: a second connecting arm, a second connecting plate, an elastic element, a second mounting bracket, and a second roller. The second connecting arm is movably arranged in the vertical direction; the second connecting plate is vertically and fixedly installed at the bottom end of the second connecting arm; one end of the elastic element is fixedly installed at the middle of the bottom end of the second connecting plate; the second mounting bracket is fixedly installed at the other end of the elastic element; and the second roller is rotatably connected to the inner cavity of the second mounting bracket.

[0010] In the above technical solution, the second mounting bracket sidewall is provided with a locking assembly, which includes: a locking block, a vertical arm, a limiting rod, and a spring. The locking block is fixedly installed on the right sidewall of the second mounting bracket; the vertical arm is vertically and fixedly installed on the bottom end of the second connecting plate; the limiting rod slides horizontally through the outer wall of the vertical arm; the spring is sleeved on the limiting rod, and the spring is connected to the right end of the limiting rod and the right sidewall of the vertical arm respectively.

[0011] In the above technical solution, the first limiting component and the second limiting component are driven by a driving component, which includes: a mounting arm, a second hydraulic cylinder, and a lifting seat. The mounting arm is fixedly mounted on the main body of the equipment; the second hydraulic cylinder is fixedly mounted on the top end of the mounting arm; and the lifting seat is fixedly and vertically mounted on the output end of the second hydraulic cylinder.

[0012] The first connecting arm and the second connecting arm are respectively vertically and fixedly installed at the bottom end of the lifting seat.

[0013] In the above technical solution, the lifting assembly is provided in two sets. Each set of the lifting assembly includes: a first hydraulic cylinder, a lifting seat and a placement groove. The first hydraulic cylinder is fixedly installed on the front side wall of the main body of the equipment. The lifting seat is installed on the output end of the first hydraulic cylinder. The placement groove is opened on the lifting seat, and the unwinding shaft is placed in the inner cavity of the placement groove.

[0014] In the above technical solution, each lifting component further includes: a guide seat and a guide bar. The guide seat is fixedly installed on the rear side wall of the lifting seat, and the cross-sectional shape of the guide seat is U-shaped. The guide bar is fixedly and vertically installed on the front side wall of the main body of the equipment, and the guide seat is slidably arranged along the outer wall of the guide bar.

[0015] The above technical solution also includes a fastening assembly, which includes a drive rod and a positioning seat. There are two drive rods, and the two drive rods are respectively vertically and fixedly installed on the left and right sides of the bottom end of the second connecting plate. The positioning seat is installed on the bottom end of the drive rod and fastens to the lifting seat.

[0016] In the above technical solution, the cross-sectional shape of the positioning seat is set to arc.

[0017] The unwinding mechanism of this sealing machine has the following advantages compared with the prior art:

[0018] I. Addressing the problem that existing unwinding equipment lacks a limiting mechanism, resulting in loose and misaligned plastic packaging products after the free end of the roll is cut. This leads to large tension fluctuations during subsequent unwinding, making it impossible to maintain a constant linear speed, causing uneven unwinding and non-equidistant spacing, ultimately affecting the cutting accuracy of the plastic packaging products. This invention incorporates an adaptive limiting mechanism on the plastic product. This mechanism, through elastic contact or dynamic following structure, maintains a tight fit with the sidewall of the plastic product, forming a real-time limiting constraint. Throughout the unwinding process, the limiting mechanism continuously applies uniform radial pressure to the plastic product, effectively offsetting tension fluctuations caused by changes in the roll diameter. This ensures that the plastic product wound on the unwinding shaft remains tightly wound. Through this dynamic limiting mechanism, the unwinding process can maintain a constant linear speed output, achieving equidistant unwinding, fundamentally eliminating cutting accuracy deviations caused by loose rolls, and significantly improving the dimensional consistency and finished product qualification rate of subsequent cutting and sealing processes for plastic packaging products.

[0019] Second, this utility model also includes a limiting function for the output end of the plastic product. Through components such as the first roller, the position of the plastic product at the second guide roller can be limited during unwinding, thus preventing the plastic product from scattering and shifting after being cut off at the output end. Furthermore, the limiting function at the output end of the plastic product and the limiting function on the unwinding shaft are achieved by the same power, enabling coordinated operation of multiple limiting functions.

[0020] Third, with the cooperation of components such as the second hydraulic cylinder, lifting seat, first connecting arm, and second connecting arm, this utility model can simultaneously realize the limiting function of the output end of the plastic product and the limiting function of the plastic product on the unwinding shaft. Through the coordinated control of the same driving force, the synchronous response of the dual-end limiting functions of the output end and the winding end of the plastic product is realized. This integrated design not only simplifies the mechanical structure, but also ensures the dynamic coordination between different limiting functions.

[0021] IV. This utility model is equipped with a positioning function at the placement slot. Through mechanical stops, it ensures that the unwinding shaft and the plastic product can be stably kept within the working space defined by the positioning seat and the lifting seat during the unwinding process, regardless of the speed change. This can effectively avoid the risk of parts detaching due to high-speed operation, realize the stable operation of the equipment under different working conditions, and significantly improve the reliability and safety of the unwinding process.

[0022] V. This equipment is equipped with an automated lifting mechanism for the unwinding shaft and plastic products, realizing the automatic winding operation of the roll material. This lifting system can ensure that the unwinding shaft and plastic products maintain a horizontal posture and stable movement during the lifting process, and accurately position them to the preset unwinding station. Compared with the traditional manual handling and winding operation mode, it significantly reduces labor intensity, improves production efficiency, and at the same time ensures the safety and reliability of the lifting process.

[0023] In summary, this utility model uses an adaptive limiting mechanism to provide real-time constraint on plastic products, offsetting tension fluctuations and maintaining a constant linear speed to achieve equidistant unwinding, thereby improving cutting accuracy. The use of a single power source enables coordinated operation of the limiting functions at the output and winding ends of the plastic products, simplifying the structure and ensuring dynamic collaboration. The mechanical stop positioning function at the placement slot ensures stable operation of the unwinding shaft and the plastic products at different speeds, preventing component detachment and comprehensively improving the reliability, safety, and finished product qualification rate of the unwinding process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main body of the device of this utility model;

[0025] Figure 2 This is a front view of the second roller of this utility model;

[0026] Figure 3 This is a schematic diagram of the lifting seat of this utility model;

[0027] Figure 4 This is a schematic diagram of the positioning seat of this utility model;

[0028] Figure 5 for Figure 4 Enlarged view of point A;

[0029] Figure 6 This is a schematic diagram of the structure of the placement groove of this utility model;

[0030] Figure 7 This is a schematic diagram of the structure of the guide strip of this utility model;

[0031] Figures 1 to 7 In the middle, 1. Equipment body, 2. First hydraulic cylinder, 3. Lifting seat, 4. Placement slot, 5. Guide seat, 6. Guide bar, 7. Unwinding shaft, 8. Plastic product, 9. First guide roller, 10. Second guide roller, 11. Mounting arm, 12. Second hydraulic cylinder, 13. Lifting seat, 14. First connecting arm, 15. First connecting plate, 16. Frame, 17. First mounting frame, 18. First roller, 19. Second connecting arm, 20. Second connecting plate, 21. Drive rod, 22. Positioning seat, 23. Elastic element, 24. Second mounting frame, 25. Second roller, 26. Locking block, 27. Vertical arm, 28. Limiting rod, 29. Spring. Detailed Implementation

[0032] The following are specific implementation cases and appendices. Figures 1 to 7 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0033] A sealing machine's unwinding mechanism includes a main body 1, and further includes: a lifting component, an unwinding shaft 7, a plastic product 8, a first guide roller 9, a second guide roller 10, a first limiting component, and a second limiting component. The lifting component is disposed on the front side wall of the main body 1. One end of the plastic product 8 is adhered to the outer wall of the unwinding shaft 7 and wound around the unwinding shaft 7, and the unwinding shaft 7 is driven to rise and fall by the lifting component. The first guide roller 9 is fixedly installed horizontally below the inner cavity of the main body 1. Multiple second guide rollers 10 are provided, and the multiple second guide rollers 10 are fixed horizontally and installed parallel to each other above the inner cavity of the main body 1. The other end of the plastic product 8 is attached to the lower surface of the first guide roller 9 and wound in a curved serpentine shape along the surfaces of the multiple second guide rollers 10. The first limiting component is disposed above the second guide roller 10 and is used to limit the plastic product 8 wound on the second guide roller 10. The second limiting component is disposed above the plastic product 8 and is used to limit the plastic product 8 wound on the unwinding shaft 7.

[0034] This invention incorporates a limiting function on the plastic product 8 to ensure continuous and tight contact with the side wall of the plastic product 8, providing real-time limiting protection. Throughout the unwinding process, the limiting mechanism stably outputs radial pressure, effectively compensating for tension fluctuations caused by changes in the roll diameter, ensuring that the plastic product 8 wound on the unwinding shaft 7 remains taut. Relying on this dynamic limiting technology, the equipment can precisely control the unwinding speed, achieving constant linear speed operation and ensuring uniform unwinding spacing. This fundamentally solves the problem of cutting accuracy caused by loose roll material, significantly improving the dimensional accuracy and product qualification rate of plastic packaging products in subsequent cutting and sealing processes.

[0035] For details, please refer to the main references. Figures 2 to 5As shown, the first limiting assembly includes: a first connecting arm 14, a first connecting plate 15, a frame 16, a first mounting bracket 17, and a first roller 18. The first connecting arm 14 is movably arranged in the vertical direction; the first connecting plate 15 is fixedly and vertically installed at the bottom end of the first connecting arm 14; four frames 16 are provided, and the four frames 16 are respectively installed at the four corners of the bottom end of the first connecting plate 15; the first mounting bracket 17 is fixedly installed at the bottom end of the frame 16; the first roller 18 is rotatably connected to the first mounting bracket 17 through a bearing, and the first roller 18 abuts against the surface of the plastic product 8 wound on the second guide roller 10. The first roller 18 can tightly position the plastic product 8 wound on the second guide roller 10, preventing the plastic product 8 from being dislodged from the limit at the second guide roller 10 when the free end is cut off; each first mounting frame 17 has two first rollers 18 rotatably arranged at its bottom end, and the two first rollers 18 are symmetrically arranged with respect to the frame 16. Through the two oppositely arranged first rollers 18, it can be ensured that the plastic product 8 has two positioning points on the second guide roller 10, which is more stable than the single positioning point method and can better ensure the stability of the plastic product 8 at the second guide roller 10;

[0036] This utility model can realize the limiting function of the output end of the plastic product 8. Through the first roller 18 and other components, the position of the plastic product 8 at the second guide roller 10 can be limited to prevent the plastic product 8 from scattering and deviating after the output end of the plastic product 8 is cut. Moreover, the limiting function of the output end of the plastic product 8 and the limiting function of the plastic product 8 on the unwinding shaft 7 are realized by the same power, which can realize the coordinated operation of multiple limiting functions.

[0037] The second limiting assembly includes: a second connecting arm 19, a second connecting plate 20, an elastic element 23, a second mounting bracket 24, and a second roller 25. The second connecting arm 19 is movably arranged in the vertical direction; the second connecting plate 20 is vertically and fixedly installed at the bottom end of the second connecting arm 19; one end of the elastic element 23 is fixedly installed at the middle of the bottom end of the second connecting plate 20; the second mounting bracket 24 is fixedly installed at the other end of the elastic element 23; and the second roller 25 is rotatably connected to the inner cavity of the second mounting bracket 24 via a bearing.

[0038] Under the elastic force of the elastic element 23, the second mounting bracket 24 and the second roller 25 can be moved downward, so that the second roller 25 can always elastically abut against the plastic product 8 on the unwinding shaft 7, thus limiting the plastic product 8. As the plastic product 8 is continuously unwound, the thickness of the plastic product 8 at the unwinding shaft 7 becomes thinner. Under the elastic force of the elastic element 23, the second roller 25 can always elastically abut against the side wall of the plastic product 8, that is, it can always limit the plastic product 8 during the unwinding process.

[0039] In addition, the second mounting bracket 24 is provided with a locking assembly on its side wall. The locking assembly includes a locking block 26, a vertical arm 27, a limiting rod 28, and a spring 29. The locking block 26 is fixedly installed on the right side wall of the second mounting bracket 24. The vertical arm 27 is vertically and fixedly installed on the bottom end of the second connecting plate 20. The limiting rod 28 slides horizontally through the outer wall of the vertical arm 27. The spring 29 is sleeved on the limiting rod 28 and is connected to the right end of the limiting rod 28 and the right side wall of the vertical arm 27, respectively. When the limiting rod 28 is moved away from the locking block 26, the limiting rod 28 is disengaged from the locking block 26. The elastic force of the elastic element 23 will cause the second roller 25 to automatically abut against the plastic product 8 and move its position elastically according to the thickness change of the plastic product 8, ensuring that the second roller 25 is always in contact with the plastic product 8.

[0040] Specifically, the second roller 25 in the initial position remains detached from the outer wall of the plastic product 8 under the limiting action of the limiting rod 28 on the locking block 26, so as to leave enough operating space for the plastic product 8 to be lifted and installed in the placement slot 4.

[0041] The first and second limiting components are driven by a drive component, which includes an mounting arm 11, a second hydraulic cylinder 12, and a lifting seat 13. The mounting arm 11 is fixedly mounted on the main body 1 of the equipment; the second hydraulic cylinder 12 is fixedly mounted on the top of the mounting arm 11; and the lifting seat 13 is fixedly and vertically mounted on the output end of the second hydraulic cylinder 12. The first connecting arm 14 and the second connecting arm 19 are respectively vertically and fixedly mounted on the bottom end of the lifting seat 13. The opening of the second hydraulic cylinder 12 causes the lifting seat 13, the first connecting arm 14, and the second connecting arm 19 to move downward synchronously. Through coordinated control by the same driving force, the synchronous response of the dual-end limiting functions of the output end and the winding end of the plastic product 8 is achieved. This integrated design not only simplifies the mechanical structure but also ensures the dynamic coordination between different limiting functions.

[0042] Main references Figure 6 and Figure 7 As shown, the lifting assembly is provided in two sets. Each set of lifting assemblies includes: a first hydraulic cylinder 2, a lifting seat 3, and a placement groove 4. The first hydraulic cylinder 2 is fixedly installed on the front side wall of the equipment body 1; the lifting seat 3 is installed at the output end of the first hydraulic cylinder 2; the placement groove 4 is opened on the lifting seat 3, and the unwinding shaft 7 is placed in the inner cavity of the placement groove 4. Each set of lifting assemblies also includes: a guide seat 5 and a guide bar 6. The guide seat 5 is fixedly installed on the rear side wall of the lifting seat 3, and the cross-sectional shape of the guide seat 5 is U-shaped; the guide bar 6 is fixed and vertically installed on the front side wall of the equipment body 1, and the guide seat 5 is slidably arranged along the outer wall of the guide bar 6.

[0043] After placing the plastic product 8 and the unwinding shaft 7 inside the two sets of placement slots 4, the two sets of first hydraulic cylinders 2 are started simultaneously to drive the corresponding lifting seats 3 to move vertically upward. The lifting of the lifting seats 3 drives the guide seats 5 to move upward along the outer wall of the guide strips 6. At the same time, the placement slots 4 support the unwinding shaft 7 and the plastic product 8 and lift them together, so that the bottom of the plastic product 8 is lifted off the ground, completing the material preparation process before unwinding and creating conditions for subsequent automated unwinding operations.

[0044] This equipment is equipped with an automated lifting mechanism for the unwinding shaft 7 and the plastic product 8, which enables automatic unwinding of the roll material. The lifting system ensures that the unwinding shaft 7 and the plastic product 8 maintain a horizontal posture and stable movement during the lifting process, and accurately positions them to the preset unwinding station. Compared with the traditional manual handling and unwinding operation mode, it significantly reduces labor intensity, improves production efficiency, and ensures the safety and reliability of the lifting process.

[0045] It also includes a fastening assembly, which includes a drive rod 21 and a positioning seat 22. There are two drive rods 21, which are respectively vertically and fixedly installed on the left and right sides of the bottom end of the second connecting plate 20. The positioning seat 22 is installed at the bottom end of the drive rod 21 and fastens to the lifting seat 3. Specifically, the cross-sectional shape of the positioning seat 22 is set to be arc-shaped. Thus, when the positioning seat 22 and the placement groove 4 on the lifting seat 3 are fastened, a circular positioning space adapted to the unwinding shaft 7 can be formed. This ensures that the unwinding shaft 7 is limited while not affecting the normal rotation and unwinding of the unwinding shaft 7. That is, this utility model is equipped with a positioning function at the placement groove 4. Through mechanical stop, it ensures that the unwinding shaft 7 and the plastic product 8 can be stably maintained within the working space defined by the positioning seat 22 and the lifting seat 3 during the unwinding process, regardless of the change in rotation speed. This can effectively avoid the risk of parts detachment caused by high-speed operation, realize the stable operation of the equipment under different working conditions, and significantly improve the reliability and safety of the unwinding process.

[0046] In addition, this unwinding equipment is used in conjunction with a sealing machine. That is, at the front end of the sealing machine, this equipment is used to evenly unwind the plastic product 8 to the sealing machine, so as to achieve uniform unwinding of the plastic product at the sealing machine. This is a common method in the field, and it will not be described or limited here.

[0047] It is worth noting that the first hydraulic cylinder 2 and the second hydraulic cylinder 12 used in this application are commercially available and mature hydraulic cylinders. Their output ends can be stopped at any position and locked. Commonly available models can be used, and no further details or limitations will be provided here. The two sets of first hydraulic cylinders 2 are equipped with synchronizers, which can synchronously realize the extension and retraction of the output ends of the first hydraulic cylinders 2 under the control of the external controller provided in this application. This is prior art, and no further details will be provided here. The elastic element 23 is a commercially available elastic element, which consists of a telescopic rod and a spring. The spring is sleeved on the telescopic rod, which is a commercially available telescopic rod. It consists of two interlocking rods. Under the action of external force, it can cause the total length of the telescopic rod to change. The spring is sleeved on the telescopic rod and can stretch or contract with the extension and retraction of the telescopic rod. This is a mature component of existing equipment, and no model limitations or further details will be provided here.

[0048] The working principle of the unwinding mechanism of the sealing machine in this embodiment is as follows:

[0049] The plastic product 8 and the unwinding shaft 7 are placed in two sets of placement slots 4. The lifting seats 3 at the corresponding positions are driven to move upward by the two sets of first hydraulic cylinders 2, so that the guide seat 5 is lifted upward along the outer wall of the guide strip 6. At the same time, the placement slots 4 support the unwinding shaft 7 and the plastic product 8 and lift them upward, thereby making the bottom of the plastic product 8 leave the ground for subsequent unwinding operations.

[0050] The activation of the second hydraulic cylinder 12 causes the lifting seat 13, the first connecting arm 14, and the second connecting arm 19 to move downwards synchronously. The downward movement of the first connecting arm 14 causes the first connecting plate 15, the frame 16, the first mounting bracket 17, and the first roller 18 to move downwards, so that the first roller 18 is in contact with the outer wall of the plastic product 8 on the second guide roller 10, thus limiting the plastic product 8 at the second guide roller 10. At the same time, the downward movement of the second connecting arm 19 causes the drive rod 21 and the positioning seat 22 to move downwards, so that the positioning seat 22 engages and limits the unwinding shaft 7 in the placement slot 4, ensuring that the unwinding shaft 7 is always located between the positioning seat 22 and the lifting seat. Unwinding is performed in the space between 3; the limiting rod 28 is moved away from the locking block 26, causing the limiting rod 28 to disengage from the locking block 26. Under the action of the elastic force of the elastic element 23, the second mounting bracket 24 and the second roller 25 are moved downward, so that the second roller 25 always elastically abuts against the plastic product 8 on the unwinding shaft 7, limiting the plastic product 8. As the plastic product 8 is continuously unwound, the thickness of the plastic product 8 at the unwinding shaft 7 becomes thinner. Under the action of the elastic force of the elastic element 23, the second roller 25 can always elastically abut against the side wall of the plastic product 8, that is, it can always limit the plastic product 8 during the unwinding process.

[0051] This invention uses an adaptive limiting mechanism to constrain the plastic product 8 in real time, counteracting tension fluctuations, maintaining a constant linear speed to achieve equidistant unwinding, and improving cutting accuracy. It uses the same power source to coordinate the limiting functions of the output end and winding end of the plastic product 8, simplifying the structure and ensuring dynamic coordination. The mechanical stop positioning function at the placement groove 4 ensures stable operation of the unwinding shaft 7 and the plastic product 8 at different speeds, preventing parts from detaching, and comprehensively improving the reliability, safety, and finished product qualification rate of the unwinding process.

[0052] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0053] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0054] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0055] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0056] Unless otherwise stated, the term "multiple" means two or more.

[0057] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0058] The term "and / or" describes the relationship between objects, indicating that there can be three relationships. For example, A and / or B means: A or B, or A and B.

[0059] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sealing machine unwinding mechanism, comprising a main body (1), characterized in that: Also includes: A lifting assembly is disposed on the front side wall of the main body of the equipment (1); Unwinding shaft (7) and plastic product (8), one end of the plastic product (8) is adhered to the outer wall of the unwinding shaft (7) and wrapped around the unwinding shaft (7), and the unwinding shaft (7) is driven to rise and fall by the lifting assembly; The first guide roller (9) is fixedly installed in the lower part of the inner cavity of the main body (1) of the equipment in the horizontal direction; The second guide roller (10) is provided in multiple ways, and the multiple second guide rollers (10) are fixed and parallel to each other in the horizontal direction and installed above the inner cavity of the main body (1) of the equipment. The other end of the plastic product (8) is attached to the lower surface of the first guide roller (9) and is wound in a curved serpentine shape along the surface of the multiple second guide rollers (10). A first limiting component is disposed above the second guide roller (10) for limiting the plastic product (8) wound on the second guide roller (10); The second limiting component is disposed above the plastic product (8) and is used to limit the plastic product (8) wound on the unwinding shaft (7).

2. The unwinding mechanism of a sealing machine according to claim 1, characterized in that: The first limiting component includes: The first connecting arm (14) is movably arranged in the vertical direction; The first connecting plate (15) is fixed and vertically installed at the bottom end of the first connecting arm (14); The frame (16) is provided in four parts, and the four frames (16) are respectively installed at the four corners of the bottom end of the first connecting plate (15); The first mounting bracket (17) is fixedly installed at the bottom end of the frame (16); The first roller (18) is rotatably connected to the first mounting bracket (17), and the first roller (18) abuts against the surface of the plastic product (8) wound on the second guide roller (10).

3. The unwinding mechanism of a sealing machine according to claim 2, characterized in that: Each of the first mounting brackets (17) has two first rollers (18) rotatably mounted at its bottom end, and the two first rollers (18) are symmetrically arranged relative to the bracket body (16).

4. The unwinding mechanism of a sealing machine according to claim 2, characterized in that: The second limiting component includes: The second connecting arm (19) is movably arranged in the vertical direction; The second connecting plate (20) is vertically and fixedly installed at the bottom end of the second connecting arm (19); Elastic element (23), one end of which is fixedly installed at the bottom center of the second connecting plate (20); The second mounting bracket (24) is fixedly mounted on the other end of the elastic member (23); The second roller (25) is rotatably connected to the inner cavity of the second mounting bracket (24).

5. The unwinding mechanism of a sealing machine according to claim 4, characterized in that: The second mounting bracket (24) has a locking assembly on its side wall, the locking assembly comprising: The locking block (26) is fixedly installed on the right side wall of the second mounting bracket (24); Vertical arm (27), which is vertically and fixedly installed at the bottom end of the second connecting plate (20); A limiting rod (28) slides horizontally through the outer wall of the vertical arm (27); Spring (29) is sleeved on the limiting rod (28), and the spring (29) is connected to the right end of the limiting rod (28) and the right side wall of the vertical arm (27).

6. The unwinding mechanism of a sealing machine according to claim 4, characterized in that: The first limiting component and the second limiting component are driven by a driving component, the driving component including: Mounting arm (11), which is fixedly mounted on the main body (1) of the equipment; The second hydraulic cylinder (12) is fixedly installed on the top of the mounting arm (11); Lifting seat (13), which is fixed and vertically installed at the output end of the second hydraulic cylinder (12); The first connecting arm (14) and the second connecting arm (19) are respectively vertically and fixedly installed at the bottom of the lifting seat (13).

7. The unwinding mechanism of a sealing machine according to claim 4, characterized in that: The lifting assembly is provided in two sets, and each set of the lifting assembly includes: The first hydraulic cylinder (2) is fixedly installed on the front side wall of the main body (1) of the equipment; Lifting seat (3), the lifting seat (3) is installed at the output end of the first hydraulic cylinder (2); Placement groove (4) is provided on the lifting seat (3), and the unwinding shaft (7) is placed in the inner cavity of the placement groove (4).

8. The unwinding mechanism of a sealing machine according to claim 7, characterized in that: Each of the lifting components also includes: Guide seat (5), the guide seat (5) is fixedly installed on the rear side wall of the lifting seat (3), and the cross-sectional shape of the guide seat (5) is U-shaped; Guide bar (6), the guide bar (6) is fixed and vertically installed on the front side wall of the main body (1) of the equipment, and the guide seat (5) is slidably arranged along the outer wall of the guide bar (6).

9. The unwinding mechanism of a sealing machine according to claim 7, characterized in that: It also includes a fastening assembly, the fastening assembly comprising: Two drive rods (21) are provided, and the two drive rods (21) are respectively vertically and fixedly installed on the left and right sides of the bottom end of the second connecting plate (20); Positioning seat (22) is installed at the bottom end of the drive rod (21) and is fastened to the lifting seat (3).

10. The unwinding mechanism of a sealing machine according to claim 9, characterized in that: The cross-sectional shape of the positioning seat (22) is set to be arc-shaped.

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