Flexible composite sheet seaming, seaming, heat sealing and covering apparatus and method of use

Abstract

The application discloses a flexible composite sheet sewing seam hot sealing covering device and a use method, relates to the technical field of agricultural greenhouse facility processing equipment, and comprises a rack, a conveying mechanism, a damping trailing mechanism and a plurality of heating and pressing mechanisms. The rack has an inlet end and an outlet end. The conveying mechanism is arranged at the outlet end of the rack to drive the flexible composite sheet to move in the outlet direction. The damping trailing mechanism is arranged at the inlet end of the rack and is used for applying constant backward resistance to the flexible composite sheet entering the processing area, so that the flexible composite sheet can keep a tensioned and flat state during the processing. Each heating and pressing mechanism is arranged at the top of the rack and is used for hot-pressing and bonding the covering film at the sewing seam of the flexible composite sheet. Each heating and pressing mechanism can move along the width direction of the flexible composite sheet and keep the distance after the movement, so as to correspond to the sewing seam on the flexible composite sheet, effectively seal the pinholes, effectively keep the flatness of the sewing seam of the flexible composite sheet during the sealing and fitting process, and effectively improve the hot sealing quality and the production efficiency.

Description

Technical Field

[0001] This invention relates to the field of agricultural greenhouse facility processing equipment technology, and in particular to a flexible composite sheet seam heat sealing covering device and its usage method. Background Technology

[0002] Greenhouses are common facilities used in modern agriculture for cultivating plants. The thermal insulation performance of the greenhouse walls and insulation blankets directly affects the stability of the temperature inside the greenhouse and the quality of crop growth. In existing technologies, greenhouse wall coverings use flexible composite sheets, and the various layers are fixed and sewn together by a quilting mechanism, which significantly improves the thermal insulation performance.

[0003] However, the aforementioned flexible composite sheets face the following technical challenges in large-scale production and processing: First, the quilting needles penetrate multiple layers of material, creating numerous pinholes. These pinholes become channels for rainwater seepage, leading to dampness, clumping, mold growth, and increased thermal conductivity in the internal heat storage and insulation layer. While existing technologies have proposed solutions to cover these pinholes by bonding sealing strips, the bonding process mainly relies on manual operation, resulting in low efficiency, inconsistent quality, and problems such as air bubbles, curling edges, or poor adhesion.

[0004] Secondly, existing heat sealing equipment, such as hot air seam sealing machines (sealing machines), is mainly suitable for sealing the seams of thin fabrics such as clothing and tents. It lacks a targeted design for flexible composite sheets, which are multi-layered, large-format, and thick materials, and cannot effectively solve the problems of wrinkles and tension during the transportation of large-format materials. Summary of the Invention

[0005] The purpose of this invention is to provide a heat-sealing covering device and method for flexible composite sheet seams, so as to solve the problems existing in the prior art, achieve effective sealing of pinholes, effectively maintain the flatness of the seam of the flexible composite sheet during the sealing and bonding process, and effectively improve the heat-sealing quality and production efficiency.

[0006] To achieve the above objectives, the present invention provides the following solution: This invention provides a heat-sealing covering device for seams of flexible composite sheets, comprising: a frame, a conveying mechanism, a damping dragging mechanism, and multiple heating and pressing mechanisms. The frame has an inlet end and an outlet end. The conveying mechanism is disposed at the outlet end of the frame to drive the flexible composite sheet to move along the outlet direction. The damping dragging mechanism is disposed at the inlet end of the frame to apply a constant backward resistance to the flexible composite sheet entering the processing area, so that the flexible composite sheet remains taut and flat during processing. Each heating and pressing mechanism is disposed at the top of the frame to heat-press and bond the covering film to the seams of the flexible composite sheet, and each heating and pressing mechanism can move along the width direction of the flexible composite sheet and maintain the distance after movement to correspond to the seams on the flexible composite sheet.

[0007] Preferably, the conveying mechanism includes a drive motor, a first conveying roller, and a first gravity roller. The drive motor is installed at the bottom of the frame and is connected to the first conveying roller in a transmission manner. The first conveying roller is rotatably installed at the discharge end of the frame. The first gravity roller is slidably disposed above the first conveying roller in a vertical direction and can adhere to the upper surface of the flexible composite sheet pressed above the first conveying roller.

[0008] Preferably, the feed end of the frame is provided with a first chute on both sides, the first chute is arranged in a vertical direction, and the two ends of the first gravity roller are rotatably connected to a first roller, the first roller being slidably connected in the first chute.

[0009] Preferably, the damping dragging mechanism includes a damper, a dragging roller, and a second gravity roller. The dragging roller is rotatably connected to the feed end of the frame. The damper is disposed on one side of the feed end of the frame and is drively connected to one end of the dragging roller to provide rotational resistance to the dragging roller. The second gravity roller is slidably disposed vertically above the dragging roller and can adhere to and press against the upper surface of the flexible composite sheet passing above the dragging roller.

[0010] Preferably, the damper is a magnetic powder brake.

[0011] Preferably, the frame is provided with a second sliding groove on both sides corresponding to the second gravity roller. The second sliding groove is arranged in the vertical direction. The two ends of the second gravity roller are rotatably connected to the second rollers, and the second rollers are slidably connected in the second sliding groove.

[0012] Preferably, it further includes at least one second conveying roller, each second conveying roller being disposed on the frame and arranged parallel to the first conveying roller, and located between the first conveying roller and the drag roller.

[0013] Preferably, the top of the frame is equipped with a slide rail along the width direction of the flexible composite sheet. The heating and pressing mechanism includes a sliding seat, a pressure roller, an unwinding reel, a heating element, and a controller. The sliding seat is slidably connected to the slide rail, and a locking element is provided on the sliding seat to fix the sliding seat in a designated position on the slide rail. The pressure roller is rotatably mounted on the lower part of the sliding seat. The unwinding reel is rotatably mounted on the sliding seat on one side of the pressure roller in the feeding direction and is used to mount the cover film roll. The heating element is mounted on the sliding seat, and the output end of the heating element is used to heat the seam contact position of the cover film and the flexible composite sheet. The controller is mounted on the sliding seat and electrically connected to the heating element to control the output temperature of the heating element.

[0014] Preferably, it further includes multiple telescopic rods and multiple pressure rollers, the fixed end of the telescopic rod is fixedly connected to the sliding seat, and the telescopic end of the telescopic rod is rotatably connected to the pressure roller so as to drive the pressure roller to press against the first gravity roller.

[0015] The present invention also provides a method for using the flexible composite sheet seam heat sealing covering device as described in any of the preceding claims, characterized by comprising the following steps: S1. The flexible composite sheet to be processed is passed sequentially from the feed end of the frame through the damping dragging mechanism and each of the heating and pressing mechanisms, and is led out from the discharge end of the frame, with the seam of the flexible composite sheet facing upwards. S2. According to the width direction position of each seam on the flexible composite sheet, move each of the heating and pressing mechanisms so that each of the heating and pressing mechanisms is aligned with the corresponding seam and the distance after movement is maintained. S3. Install the covering film on each of the heating and pressing mechanisms, and pull the starting end of the covering film to the corresponding position of the starting end of the flexible composite sheet seam; S4. Activate the damping dragging mechanism and adjust the damping value of the damping dragging mechanism so that the damping dragging mechanism generates a constant backward resistance on the flexible composite sheet. S5. Start the conveying mechanism. The conveying mechanism drives the flexible composite sheet to move from the feeding end to the discharging end. The damping dragging mechanism applies a constant backward resistance to the flexible composite sheet, so that the flexible composite sheet remains taut and flat between the damping dragging mechanism and the conveying mechanism. S6. Activate each of the heating and pressing mechanisms. Each of the heating and pressing mechanisms heat-presses the cover film onto the seam of the flexible composite sheet to achieve a firm fit between the cover film and the flexible composite sheet. S7. During the heat sealing process, monitor the tension of the flexible composite sheet in real time, and adjust the damping value of the damping dragging mechanism according to the material and thickness changes of the flexible composite sheet to keep the flexible composite sheet in a constant tension and flat state. S8. When it is necessary to process flexible composite sheets with different seam spacing, the positions of each heating and pressing mechanism are readjusted along the width direction of the flexible composite sheet so that each heating and pressing mechanism corresponds to the new seam position.

[0016] The present invention achieves the following technical effects compared to the prior art: This invention provides a heat-sealing covering device and method for seams of flexible composite sheets. A damping dragging mechanism applies constant backward resistance to the flexible composite sheet, which, in conjunction with a conveying mechanism, propels the sheet forward. This ensures the flexible composite sheet remains taut and flat within the processing area, preventing wrinkles during heat sealing of large-area, thick flexible composite sheets and guaranteeing accurate adhesion of the covering film to the seams. Simultaneously, multiple adjustable heating and pressing mechanisms, movable along the width of the flexible composite sheet, adapt to processing needs of flexible composite sheets with varying seam spacings. Compared to manual bonding, this significantly improves the efficiency of pinhole sealing, ensures sealing quality, and prevents issues such as bubbles, curling edges, or poor adhesion of the covering film. It is specifically designed for heat sealing of seams in multi-layer, thick flexible composite sheets used in greenhouses, solving the problem that existing heat-sealing equipment cannot handle large-area, thick materials. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of the flexible composite sheet seam heat sealing and covering device provided by the present invention, showing the material outlet direction. Figure 2 This is a schematic diagram of the structure of the flexible composite sheet seam heat sealing and covering device provided by the present invention, showing the direction of the feeding end. In the diagram: 1. Frame; 2. Drive motor; 3. First conveyor roller; 4. First gravity roller; 5. First chute; 6. Damper; 7. Traction roller; 8. Second gravity roller; 9. Second chute; 10. Slide rail; 11. Sliding seat; 12. Pressure roller; 13. Unwinding reel; 14. Heating element; 15. Controller; 16. Telescopic rod; 17. Pressure roller. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0020] The purpose of this invention is to provide a heat-sealing covering device and method for flexible composite sheet seams, so as to solve the problems existing in the prior art, achieve effective sealing of pinholes, effectively maintain the flatness of the seam of the flexible composite sheet during the sealing and bonding process, and effectively improve the heat-sealing quality and production efficiency.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1 This embodiment provides a flexible composite sheet seam heat sealing and covering device, such as... Figures 1-2 As shown, the system includes: a frame 1, a conveying mechanism, a damping dragging mechanism, and multiple heating and pressing mechanisms. The frame 1 has an inlet end and an outlet end. The conveying mechanism is located at the outlet end of the frame 1 to drive the flexible composite sheet to move along the outlet direction. The damping dragging mechanism is located at the inlet end of the frame 1 to apply a constant backward resistance to the flexible composite sheet entering the processing area, so that the flexible composite sheet remains taut and flat during processing. Each heating and pressing mechanism is located at the top of the frame 1 to heat-press and bond the cover film to the seam of the flexible composite sheet, and each heating and pressing mechanism can move along the width of the flexible composite sheet. The machine moves in a certain direction and maintains the distance after the movement to correspond to the seams on the flexible composite sheet. By setting a damping dragging mechanism and a conveying mechanism at the feed end and discharge end of the frame 1 respectively, the conveying mechanism provides forward traction and the damping dragging mechanism provides constant backward resistance, so that the flexible composite sheet is always kept taut and flat in the processing area, effectively eliminating wrinkles and looseness caused by quilting shrinkage of the flexible composite sheet. At the same time, multiple heating and pressing mechanisms can move and adjust independently along the width direction of the flexible composite sheet, which can adapt to the processing requirements of different seam spacings, greatly improving the versatility and processing efficiency of the device.

[0023] In a preferred embodiment, the conveying mechanism includes a drive motor 2, a first conveying roller 3, and a first gravity roller 4. The drive motor 2 is mounted on the bottom of the frame 1 and is connected to the first conveying roller 3. The first conveying roller 3 is rotatably mounted on the discharge end of the frame 1. The first gravity roller 4 is slidably disposed above the first conveying roller 3 in a vertical direction and can adhere to the upper surface of the flexible composite sheet pressed above the first conveying roller 3. The first gravity roller 4 adheres to the upper surface of the flexible composite sheet pressed above the first conveying roller 3 by its own weight, providing a constant positive pressure during the conveying process, increasing the friction between the flexible composite sheet and the first conveying roller 3, effectively preventing the flexible composite sheet from slipping during traction, and ensuring the stability and reliability of the conveying. At the same time, the gravity roller has a simple structure and does not require an external power source, reducing equipment costs and energy consumption.

[0024] In a preferred embodiment, the feed end of the frame 1 is provided with a first slide groove 5 on both sides. The first slide groove 5 is arranged vertically. The two ends of the first gravity roller 4 are rotatably connected to first rollers, which are slidably connected in the first slide groove 5. The first gravity roller 4 is slidably connected in the vertically arranged first slide groove 5 through the first rollers at both ends, so that the first gravity roller 4 can slide freely up and down in the vertical direction. When the thickness of the flexible composite sheet changes, the height position is automatically adjusted to always fit and press the surface of the flexible composite sheet, adapting to the processing requirements of flexible composite sheets of different thicknesses. At the same time, the cooperation between the roller and the slide groove has low frictional resistance and smooth movement, ensuring the uniformity and stability of the pressure of the gravity roller on the flexible composite sheet.

[0025] In a preferred embodiment, the damping dragging mechanism includes a damper 6, a dragging roller 7, and a second gravity roller 8. The dragging roller 7 is rotatably connected to the feed end of the frame 1. The damper 6 is disposed on one side of the feed end of the frame 1 and is drivenly connected to one end of the dragging roller 7 to provide rotational resistance to the dragging roller 7. The second gravity roller 8 is vertically slidably disposed above the dragging roller 7 and can press against the upper surface of the flexible composite sheet passing above the dragging roller 7. The second gravity roller 8 presses the flexible composite sheet onto the dragging roller 7 by its own weight, increasing the contact friction between the flexible composite sheet and the dragging roller 7, so that the rotational resistance provided by the damper 6 can be effectively transmitted to the flexible composite sheet, generating a constant backward restraining force. The damper 6 is directly driven connected to the dragging roller 7, which is responsive and precise in control, and can realize the precise adjustment of the tension of the flexible composite sheet, ensuring that the flexible composite sheet is in an ideal tensioned and flat state throughout the processing.

[0026] In a preferred embodiment, the damper 6 is a magnetic powder brake. The magnetic powder brake has the characteristic that the braking torque and the excitation current have a good linear relationship. The magnitude of the damping torque can be precisely controlled by adjusting the current, so as to realize stepless and precise adjustment of the tension of the flexible composite sheet. At the same time, the magnetic powder brake has a fast response speed, high control accuracy, and stable and reliable operation. It can adapt to the different tension requirements of flexible composite sheets of different materials and thicknesses, and ensure the consistency of heat sealing coverage quality.

[0027] In a preferred embodiment, the frame 1 is provided with second grooves 9 on both sides corresponding to the second gravity roller 8. The second grooves 9 are arranged vertically, and the two ends of the second gravity roller 8 are rotatably connected to second rollers. The second rollers are slidably connected in the second grooves 9. The second gravity roller 8 is slidably connected in the vertically arranged second grooves 9 through the second rollers at both ends, so that the second gravity roller 8 can slide freely up and down in the vertical direction. It automatically adapts to height changes when flexible composite sheets of different thicknesses pass through, and always maintains uniform pressure on the flexible composite sheet. The cooperation structure between the rollers and the grooves is simple and reliable, ensuring the smooth movement of the second gravity roller 8 and the uniformity of pressure application, and avoiding local compression damage to the flexible composite sheet.

[0028] In a preferred embodiment, at least one second conveying roller is further included. Each second conveying roller is disposed on the frame 1 and parallel to the first conveying roller 3, and located between the first conveying roller 3 and the dragging roller 7. The second conveying rollers, disposed between the first conveying roller 3 and the dragging roller 7, provide auxiliary support and guidance for the central area of ​​the flexible composite sheet, effectively reducing the natural sagging and swaying of the flexible composite sheet during long-distance conveying, and ensuring the smooth movement of the flexible composite sheet in the processing area. At the same time, the arrangement of multiple conveying rollers enables the flexible composite sheet to obtain uniform support over a long processing path, which is beneficial to maintaining the overall flatness of the flexible composite sheet and the accuracy of heat sealing.

[0029] In a preferred embodiment, a slide rail 10 along the width direction of the flexible composite sheet is mounted on the top of the frame 1. The heating and pressing mechanism includes a sliding seat 11, a pressure roller 12, an unwinding reel 13, a heating element 14, and a controller 15. The sliding seat 11 is slidably connected to the slide rail 10, and a locking element is provided on the sliding seat 11 to fix the sliding seat 11 at a designated position on the slide rail 10. The pressure roller 12 is rotatably mounted on the lower part of the sliding seat 11, and the unwinding reel 13 is rotatably mounted on the sliding seat 11 on the side located in the feeding direction of the pressure roller 12, for... The set includes a cover film roll, with a heating element 14 mounted on a sliding base 11. The output end of the heating element 14 is used to heat the seam contact area between the cover film and the flexible composite sheet. A controller 15 is mounted on the sliding base 11 and electrically connected to the heating element 14 to control the output temperature of the heating element 14. The sliding base 11 can slide freely along the slide rail 10 and is fixed in position by a locking element, realizing flexible adjustment and precise positioning of the heating and pressing mechanism along the width direction of the flexible composite sheet. It can be quickly adjusted according to the actual position of the seam on the flexible composite sheet. To meet the processing needs of products with different specifications, each heating and pressing mechanism is independently equipped with an unwinding reel 13, a heating element 14, and a controller 15. Temperature parameters can be independently adjusted, allowing for differentiated heating based on material differences at different seam locations, ensuring the heat-sealing quality of each seam. The controller 15 enables precise control of the heating temperature, preventing damage to the flexible composite sheet from excessively high temperatures or poor adhesion from excessively low temperatures. The sliding seat 11 can slide freely along the slide rail 10 and is fixed in position by the locking element, enabling flexible adjustment and precise positioning of the heating and pressing mechanism along the width direction of the flexible composite sheet. It can be quickly adjusted according to the actual position of the seams on the flexible composite sheet to adapt to the processing needs of products with different specifications.

[0030] In a preferred embodiment, a rack is provided on the guide rail, and a gear that meshes with the rack is rotatably connected to the sliding seat 11. Rotating the gear allows the sliding seat 11 to move along the guide rail. After adjustment, the gear is locked by a pin, thus fixing the position of the sliding seat 11. The operation is simple, the positioning is stable and reliable, and it can effectively adapt to the processing requirements of different seam spacings.

[0031] In a preferred embodiment, the system further includes multiple telescopic rods 16 and multiple pressure rollers 17. The fixed end of the telescopic rod 16 is fixedly connected to the sliding seat 11, and the telescopic end of the telescopic rod 16 is rotatably connected to the pressure roller 17, so as to drive the pressure roller 17 to press against the first gravity roller 4, thereby further enhancing the pressing effect of the first gravity roller 4 on the flexible composite sheet above the first conveying roller 3, ensuring that the conveying mechanism can stably drive the flexible composite sheet forward, and preventing the flexible composite sheet from slipping or deviating during the conveying process. At the same time, the telescopic rod 16 can adaptively adjust the height of the pressure roller 17 according to the actual thickness of the flexible composite sheet to maintain a stable pressing force.

[0032] In a preferred embodiment, the flexible composite sheet is a greenhouse tarpaulin, greenhouse blanket, or greenhouse wall covering. This preferred embodiment is designed to be compatible with specific products such as greenhouse tarpaulins, greenhouse blankets, or greenhouse wall coverings, and can bring the following technical effects: First, greenhouse tarpaulins and greenhouse blankets with multi-layer composite structures are thick and wide, and are prone to wrinkling due to their own weight or quilting shrinkage during traditional processing. This solution, through the coordinated tensioning action of the damping dragging mechanism and the conveying mechanism, can effectively overcome the deformation problem of such heavy materials, ensuring that the seam position is always accurately aligned during the heat sealing process and avoiding the offset of the covering film. Second, greenhouse wall coverings are directly exposed to wind and rain erosion in actual use, and their requirements for the reliability and durability of the seam sealing are extremely high. This solution, through a heating and pressing mechanism, fuses the covering film and the sheet surface layer together to form a continuous and sealed waterproof layer, which can... This solution completely blocks rainwater from seeping into the internal heat storage and insulation layer through pinholes, fundamentally preventing problems such as moisture accumulation, mold growth, and increased thermal conductivity in the insulation layer. This significantly extends the service life of greenhouse facilities and maintains stable insulation performance. Furthermore, considering the structural characteristics of flexible composite sheets used in greenhouses, which typically have multiple parallel seams, this solution allows multiple heating and pressing mechanisms to be independently adjusted and operate simultaneously. This enables the sealing of all seams in one go, improving processing efficiency several times over compared to the existing method of manually bonding each seam. Moreover, each heating unit has independent temperature control, allowing for targeted temperature compensation based on slight differences in material thickness at different seams. This ensures consistent heat sealing quality for each seam, avoiding defects such as damage to the sheet due to localized overheating or poor bonding due to insufficient temperature. As a result, high-quality sealing products can be consistently output in large-scale production.

[0033] Example 2 The present invention also provides a method for using the flexible composite sheet seam heat sealing covering device as described in any of the above claims, characterized by comprising the following steps: The operator first adjusts the equipment according to the product specifications of the flexible composite sheet to be processed. The multi-layer greenhouse wall fabric (or greenhouse insulation blanket) that has been quilted and laminated is introduced from the feed end of the frame 1, so that the flexible composite sheet passes through the damping dragging mechanism (between the dragging roller 7 and the second gravity roller 8) and under the pressure rollers 12 of each heating and pressing mechanism in sequence, and finally comes out from between the first conveying roller 3 and the first gravity roller 4 at the discharge end of the frame 1, with the seam (quilting needle hole row) of the flexible composite sheet facing upward.

[0034] According to the actual distribution of each seam along the width direction on the flexible composite sheet, the operator slides the sliding seats 11 of each heating and pressing mechanism along the slide rail 10 at the top of the frame 1, so that the pressure rollers 12 under each sliding seat 11 are aligned with the corresponding seams. After adjustment, the sliding seats 11 are fixed in the designated position on the slide rail 10 by locking components, maintaining this spacing. For flexible composite sheet products with different seam spacing specifications, the relative positions of each heating and pressing mechanism can be readjusted in this step for adaptation.

[0035] The cover film (sealing strip) roll is mounted on the unwinding reel 13 of each heating and pressing mechanism. The starting end of the cover film is led out from the unwinding reel 13, guided and pulled to the bottom of the pressure roller 12, and aligned with the starting end of the corresponding seam on the flexible composite sheet.

[0036] The magnetic powder brake of the damping dragging mechanism is activated. Based on the material, thickness, and width of the flexible composite sheet being processed, the excitation current of the magnetic powder brake is adjusted, and an initial damping torque value (typically 1-10 N·m) is set to provide the dragging roller 7 with corresponding rotational resistance. The second gravity roller 8 slides down the second groove 9 under its own weight, pressing the flexible composite sheet against the upper surface of the dragging roller 7, ensuring that the rotational resistance of the dragging roller 7 is effectively transmitted to the flexible composite sheet, forming a constant backward restraining force.

[0037] The drive motor 2 of the conveying mechanism is started, which drives the first conveying roller 3 to rotate. The first gravity roller 4 slides down along the first chute 5 under its own weight, pressing against the upper surface of the flexible composite sheet above the first conveying roller 3, increasing the friction between the flexible composite sheet and the first conveying roller 3, and giving the flexible composite sheet a forward traction force. If necessary, the pressure roller 17 can be driven by the telescopic rod 16 to further press the first gravity roller 4, strengthen the pressing effect, and prevent the flexible composite sheet from slipping.

[0038] Under the combined action of the forward traction of the conveying mechanism and the backward restraint of the damping dragging mechanism, the flexible composite sheet continuously travels from the feeding end to the discharging end, maintaining a constant longitudinal tension and flatness within the processing area between the dragging roller 7 and the first conveying roller 3. The second conveying roller, located between the first conveying roller 3 and the dragging roller 7, provides auxiliary support and guidance for the central area of ​​the flexible composite sheet, reducing the natural sagging and swaying of the flexible composite sheet during long-distance conveying.

[0039] When the flexible composite sheet moves to the area below the heating and pressing mechanism, the heating element 14 heats the contact area between the cover film and the seam of the flexible composite sheet, causing the hot melt adhesive layer at the bottom of the cover film to melt. Each heating and pressing mechanism has an independently configured controller 15 that controls the output temperature of each heating element 14 according to a preset temperature value, and can be independently adjusted according to the actual situation of different seam positions.

[0040] Following the heating element 14, the pressure roller 12 presses the heated and molten cover film onto the seam of the flexible composite sheet, achieving a firm bond between the cover film and the surface layer of the flexible composite sheet. The pressing pressure of the pressure roller 12 is provided by the first gravity roller 4 or controlled by an independent pressure regulating device.

[0041] During continuous processing, the operator observes the tension of the flexible composite sheet in real time. When the flexible composite sheet becomes slack, the damping torque value of the magnetic powder brake is appropriately increased; when the flexible composite sheet is overstretched or deformed, the damping torque value is appropriately decreased. At the same time, based on the adhesion effect of the covering film (such as whether bubbles, voids, or scorching occur), the heating temperature of each heating element 14 is adjusted in real time via the controller 15.

[0042] When processing flexible composite sheet products with different seam spacing specifications, after stopping the machine, loosen the locking parts on each sliding seat 11, slide along the slide rail 10 to readjust the position of each heating and pressing mechanism, so that each pressure roller 12 corresponds to the new seam position, and after re-locking and fixing, a new round of processing can be carried out.

[0043] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A flexible composite sheet seam heat sealing and covering device, characterized in that: include: The frame has a feed end and a discharge end; A conveying mechanism is provided at the discharge end of the frame to drive the flexible composite sheet to move along the discharge direction; A damping dragging mechanism is provided at the feed end of the frame to apply a constant backward resistance to the flexible composite sheet entering the processing area so that the flexible composite sheet remains taut and flat during processing. as well as Multiple heating and pressing mechanisms are provided, each of which is located on the top of the frame and is used to heat-press the cover film onto the seam of the flexible composite sheet. Each heating and pressing mechanism is capable of moving along the width direction of the flexible composite sheet and maintaining the distance after moving, so as to correspond to the seam on the flexible composite sheet.

2. The flexible composite sheet seam heat sealing covering device according to claim 1, characterized in that: The conveying mechanism includes a drive motor, a first conveying roller, and a first gravity roller. The drive motor is installed at the bottom of the frame and is connected to the first conveying roller in a transmission manner. The first conveying roller is rotatably installed at the discharge end of the frame. The first gravity roller is slidably disposed above the first conveying roller in a vertical direction and can adhere to the upper surface of the flexible composite sheet pressed above the first conveying roller.

3. The flexible composite sheet seam heat sealing covering device according to claim 2, characterized in that: The feed end of the frame is provided with a first slide groove on both sides. The first slide groove is arranged in the vertical direction. The two ends of the first gravity roller are rotatably connected to the first rollers, and the first rollers are slidably connected in the first slide groove.

4. The flexible composite sheet seam heat sealing covering device according to claim 3, characterized in that: The damping dragging mechanism includes a damper, a dragging roller, and a second gravity roller. The dragging roller is rotatably connected to the feed end of the frame. The damper is disposed on one side of the feed end of the frame and is drively connected to one end of the dragging roller to provide rotational resistance to the dragging roller. The second gravity roller is vertically slidably disposed above the dragging roller and can adhere to and press against the upper surface of the flexible composite sheet passing above the dragging roller.

5. The flexible composite sheet seam heat sealing covering device according to claim 4, characterized in that: The damper is a magnetic powder brake.

6. The flexible composite sheet seam heat sealing covering device according to claim 5, characterized in that: The frame is provided with a second sliding groove on both sides corresponding to the second gravity roller. The second sliding groove is arranged in the vertical direction. The two ends of the second gravity roller are rotatably connected to the second rollers, and the second rollers are slidably connected in the second sliding groove.

7. The flexible composite sheet seam heat sealing covering device according to claim 6, characterized in that: It also includes at least one second conveying roller, each second conveying roller being disposed on the frame and arranged parallel to the first conveying roller, and located between the first conveying roller and the drag roller.

8. The flexible composite sheet seam heat sealing covering device according to claim 7, characterized in that: The top of the frame is equipped with a slide rail along the width direction of the flexible composite sheet. The heating and pressing mechanism includes a sliding seat, a pressure roller, an unwinding reel, a heating element, and a controller. The sliding seat is slidably connected to the slide rail and is equipped with a locking element to fix the sliding seat in a designated position on the slide rail. The pressure roller is rotatably mounted on the lower part of the sliding seat. The unwinding reel is rotatably mounted on the sliding seat on one side of the pressure roller in the feeding direction and is used to mount the cover film roll. The heating element is mounted on the sliding seat, and the output end of the heating element is used to heat the seam contact position between the cover film and the flexible composite sheet. The controller is mounted on the sliding seat and electrically connected to the heating element to control the output temperature of the heating element.

9. The flexible composite sheet seam heat sealing covering device according to claim 8, characterized in that: It also includes multiple telescopic rods and multiple pressure rollers. The fixed end of the telescopic rod is fixedly connected to the sliding seat, and the telescopic end of the telescopic rod is rotatably connected to the pressure roller so as to drive the pressure roller to press against the first gravity roller.

10. A method of using the flexible composite sheet seam heat sealing covering device as described in any one of claims 1 to 9, characterized in that: Includes the following steps: S1. The flexible composite sheet to be processed is passed sequentially from the feed end of the frame through the damping dragging mechanism and each of the heating and pressing mechanisms, and is led out from the discharge end of the frame, with the seam of the flexible composite sheet facing upwards. S2. According to the width direction position of each seam on the flexible composite sheet, move each of the heating and pressing mechanisms so that each of the heating and pressing mechanisms is aligned with the corresponding seam and the distance after movement is maintained. S3. Install the covering film on each of the heating and pressing mechanisms, and pull the starting end of the covering film to the corresponding position of the starting end of the flexible composite sheet seam; S4. Activate the damping dragging mechanism and adjust the damping value of the damping dragging mechanism so that the damping dragging mechanism generates a constant backward resistance on the flexible composite sheet. S5. Start the conveying mechanism. The conveying mechanism drives the flexible composite sheet to move from the feeding end to the discharging end. The damping dragging mechanism applies a constant backward resistance to the flexible composite sheet, so that the flexible composite sheet remains taut and flat between the damping dragging mechanism and the conveying mechanism. S6. Activate each of the heating and pressing mechanisms. Each of the heating and pressing mechanisms will heat-press and bond the cover film to the seam of the flexible composite sheet to achieve a firm bond between the cover film and the flexible composite sheet. S7. During the heat sealing process, monitor the tension of the flexible composite sheet in real time, and adjust the damping value of the damping dragging mechanism according to the material and thickness changes of the flexible composite sheet to keep the flexible composite sheet in a constant tension and flat state. S8. When it is necessary to process flexible composite sheets with different seam spacing, the positions of each heating and pressing mechanism are readjusted along the width direction of the flexible composite sheet so that each heating and pressing mechanism corresponds to the new seam position.

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