Method and apparatus for joining a film material with an adhesive layer

Abstract

This invention discloses a method and apparatus for bonding membrane materials with an adhesive layer. It relates to the field of membrane bonding technology. This application bonds the tail end of a first membrane material to the head end of a second membrane material, comprising the following steps: S1 Pre-cutting step: forming a pre-cut line at the tail end of the first membrane material; S2 Bonding step: overlapping the non-adhesive surface of the tail end of the first membrane material with the adhesive surface of the head end of the second membrane material to form an overlapping area, forming a 2-3 mm wide bonding portion along the pre-cut line in the middle of the overlapping area; S3 Residual cutting step: cutting off the unbonded portion at the tail end of the first membrane material and the unbonded portion at the head end of the second membrane material. This invention, through pre-cutting, bonding, and finally residual cutting, can complete the bonding step before the membrane material slitting step. When the membrane material is slitted into strips, it has sufficient bonding strength, and the joint size is ≤3m. Simultaneously, it makes membrane bonding convenient and quick, easy to operate, improves bonding efficiency and bonding yield, eliminates the bonding and rewinding step, and saves manpower and resources.

Description

Technical Field

[0001] This invention relates to the field of membrane bonding technology, and in particular to a method and apparatus for bonding membranes with an adhesive layer. Background Technology

[0002] Membrane materials with an adhesive layer refer to adhesive materials with a hot-melt adhesive layer on one side, possessing heat-adhesive properties. The preparation process of membrane materials includes a slitting step of cutting wide membrane rolls into strips of appropriate width and a winding step of winding the strips into rolls for storage. The required length of the strip rolls sometimes exceeds the rated length of the membrane roll, thus requiring an additional joining and rewinding step. Existing joining and rewinding typically involves joining multiple wound strip rolls to obtain a new finished roll with the required length, and the joint dimension (length along the strip traction direction) is ≤3mm.

[0003] For example, Chinese patent CN202322699U, published on 2013-11-27, discloses a tape splicing device, including a bracket, a pneumatic switch assembly, a temperature controller, and a soldering iron assembly. The pneumatic switch assembly, temperature controller, and soldering iron assembly are all mounted on the bracket. The soldering iron assembly consists of a soldering iron, a pressure head, and a movable rod. The soldering iron is fixed to the bracket, the temperature controller is connected to the soldering iron, the pressure head is located at one end of the movable rod and corresponds to the position of the soldering iron, and the pneumatic switch assembly is connected to the other end of the movable rod, controlling the engagement and disengagement of the pressure head and the soldering iron through the movable rod, thus achieving semi-automation of the tape splicing operation. However, this splicing device performs the splicing operation after the film roll with the adhesive layer is cut into strips. Because the width of the cut strips is relatively narrow, alignment is difficult during operation, increasing the operation difficulty, increasing the defect rate of the splice, and adding an extra joining and rewinding step, wasting manpower and resources. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a method and apparatus for bonding membrane materials with an adhesive layer. This method allows the bonding process to be completed before the slitting step, ensuring sufficient bonding strength when the membrane material is slitted into strips, with the joint size ≤3m. Simultaneously, it makes membrane bonding more convenient and faster, easier to operate, improves bonding efficiency and yield, eliminates the rewinding step, and saves manpower and resources.

[0005] This invention provides a method for bonding membrane materials with an adhesive layer, wherein the tail end of a first membrane material is bonded to the head end of a second membrane material, comprising the following steps:

[0006] S1 pre-cutting step: forming a pre-cutting line at the tail end of the first membrane material;

[0007] S2 bonding step: The non-adhesive side of the tail end of the first membrane material is overlapped with the adhesive side of the head end of the second membrane material to form an overlap area, and a 2-3mm wide bonding part is formed in the middle of the overlap area along the pre-cut line.

[0008] S3 Cutting Step: Cut off the unjoined portion at the tail end of the first membrane material and the unjoined portion at the head end of the second membrane material.

[0009] Since the width of the joint area of ​​the membrane material is 2-3mm and the material is soft and easily torn, the present invention forms a pre-cut line at the tail end of the first membrane material before the joining step, and the joining part is formed in the middle of the overlapping area formed by the non-adhesive surface at the tail end of the first membrane material and the adhesive surface at the head end of the second membrane material along the pre-cut line. This not only ensures the joining strength of the membrane materials, but also makes it easy to remove the unjoined part at the tail end of the first membrane material in the cutting step.

[0010] Specifically, when the non-adhesive surface of the first membrane material's tail end overlaps with the adhesive surface of the second membrane material's head end, the first membrane material is positioned below the second membrane material. By forming a pre-cut line on the first membrane material, excess membrane material at the unjoined tail end can be easily removed after the joining step. Without the pre-cut line, the operation would be inconvenient, the flatness of the joining boundary could not be guaranteed, affecting the joining quality, and could even lead to tearing or breaking of the 2-3mm wide joining area. Simultaneously, the joining area is formed along the pre-cut line in the center of the overlapping area, meaning the boundary of the joining area near the tail end of the first membrane material is flush with the pre-cut line. This ensures the flatness of the joining boundary, improves the joining effect, and eliminates the need for secondary trimming and removal of the pre-cut line area, thus improving joining efficiency.

[0011] Furthermore, the pre-cut line is formed by cutting along the width direction of the first membrane material, excluding the middle portion on both sides of the width. Preferably, the length of the uncut portion on both sides of the width is 2-5 mm, which ensures the smooth progress of the joining step and facilitates the removal of the unjoined portion of the first membrane material at the tail end in the trimming step, making it easy to operate. The pre-cut line can be completely cut or partially cut, preferably completely cut, so as to remove the unjoined portion of the first membrane material at the tail end in the trimming step.

[0012] Furthermore, the joint is formed by heat bonding. The overlapping area formed by pressing and fixing the non-adhesive surface of the tail end of the first film material and the adhesive surface of the head end of the second film material is then heat-bonded to form the joint.

[0013] The present invention also provides a bonding device for a film material with an adhesive layer to achieve the above-described bonding method. The bonding device includes a fixing frame, a bonding mechanism disposed on the fixing frame, and a control mechanism for controlling the bonding mechanism. The bonding mechanism includes a bonding assembly and a pressing assembly for forming the pre-cut line and the bonding portion.

[0014] Furthermore, the bonding assembly includes a heating section that forms the pre-cut line and is heatable, and support sections disposed on both sides of the heating section for supporting the membrane material.

[0015] Furthermore, the heating element includes a heating strip and a support strip, with a cutting slit between the heating strip and the support strip to form a pre-cut line. The width of the cutting slit is not particularly limited, as long as it facilitates cutting and forming the pre-cut line; for example, it can be 0.20-0.50 mm.

[0016] Furthermore, the heating element is movable between the two supporting elements on both sides. By moving the heating element between the two supporting elements, the position of the heating element is adjusted, thereby ensuring that the joining part can be formed in the middle of the overlapping area formed by overlapping the non-adhesive surface at the tail end of the first film material and the adhesive surface at the head end of the second film material along the pre-cut line.

[0017] Furthermore, a high-temperature resistant tape is attached to the surface of the heating strip. The high-temperature resistant tape is used to make the overlapping area formed by the non-adhesive surface of the tail end of the first film material and the adhesive surface of the head end of the second film material flexibly contact the heating strip, so as to facilitate thermal bonding.

[0018] Furthermore, the heating strip includes a heatable strip-shaped soldering iron with the same width as the joining portion, and a clamping strip disposed on one side of the strip-shaped soldering iron to separate the strip-shaped soldering iron from the cutting seam. On one hand, heating the strip-shaped soldering iron causes the non-adhesive surface at the tail end of the first film material to thermally bond with the adhesive surface at the head end of the second film material to form a joining area. On the other hand, because the surface of the heating strip is covered with high-temperature resistant tape, the surface of the heating strip is slightly higher than the surface of the support strip. If the strip-shaped soldering iron is located at the boundary of the cutting seam, the difference in height will cause unevenness at the joining portion, thus affecting the joining effect; even without the high-temperature resistant tape, the presence of the cutting seam in close contact with the strip-shaped soldering iron will still affect the joining effect to some extent. By separating the strip-shaped soldering iron from the cutting seam with the clamping strip, it is ensured that the thermal bonding of the film materials occurs on a flat surface, improving the joining effect.

[0019] Furthermore, the pressing assembly is disposed above the joining assembly and includes a lifting platform and a pressure plate fixed to the bottom of the lifting platform. The lifting platform drives the pressure plate to move up and down to press the overlapping area formed by the non-adhesive surface of the tail end of the first film material and the adhesive surface of the head end of the second film material.

[0020] Furthermore, the pressure plate is a soft rubber strip with a surface covered with high-temperature resistant tape, to ensure that the overlapping area formed by the non-adhesive surface of the pressure plate and the adhesive surface of the first membrane material at the tail end is completely adhered during bonding, thereby improving the bonding effect; the high-temperature resistant tape is used to protect the surface of the soft rubber strip and extend the service life of the rubber strip.

[0021] Compared with the prior art, the bonding method and bonding device for films with adhesive layers provided by the present invention have the following advantages:

[0022] By pre-cutting, then joining, and finally trimming the excess, and using a matching joining device, a 2-3mm joining area is formed along the pre-cut line in the overlapping area of ​​the non-adhesive surface at the tail end of the first membrane material and the adhesive surface at the head end of the second membrane material. This method facilitates the removal of excess unjoined membrane material and allows the joining step to be completed before the membrane material slitting step. When the membrane material is slitted into strips, it has sufficient joining strength. The joint size is ≤3m. This method also makes membrane material joining convenient, quick, and easy to operate, improving joining efficiency and yield. It eliminates the joining and rewinding step, saving manpower and resources. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In these drawings, similar reference numerals are used to denote similar elements.

[0024] Figure 1 This is a schematic diagram of the bonding state between a first membrane and a second membrane, according to an embodiment of the present invention, a method and device for bonding membranes with an adhesive layer.

[0025] Figure 2 This is a schematic diagram of a method and apparatus for bonding membrane materials with an adhesive layer according to an embodiment of the present invention;

[0026] Figure 3 This is a front view of a method and apparatus for bonding membrane materials with an adhesive layer according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of a bonding assembly of a membrane bonding method and bonding device with an adhesive layer according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the heating section of a film bonding method and bonding device with an adhesive layer according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram showing the position of the pre-cut line after the heating part moves twice in a first embodiment of a method and device for bonding membranes with an adhesive layer according to an embodiment of the present invention.

[0030] Figure 7 This is a schematic diagram showing the position of the pre-cut line after the heating part moves twice in a second embodiment of a film bonding method and bonding device with an adhesive layer according to an embodiment of the present invention.

[0031] In the diagram: 1. Fixing frame; 11. Top layer support; 12. Middle layer support; 13. Bottom layer support; 14. Casters; 15. Receiving cavity; 2. Joining assembly; 21. Heating part; 211. Heating strip; 2111. Strip soldering iron; 2112. Clamping strip; 212. Support strip; 213. Cutting seam; 22. Support part; 221. First boundary; 222. Second boundary; 23. Connecting part; 24. Bolt; 3. Pressing assembly; 31. Lifting platform; 32. Pressure plate; 4. First membrane material; 41. Pre-cut line; 5. Second membrane material roll; 51. Second membrane material; 6. Joining part; 7. Control mechanism. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0033] An embodiment of the present invention provides a method for bonding membrane materials with an adhesive layer, wherein the tail end of a first membrane material 4 is bonded to the head end of a second membrane material 51, comprising the following steps:

[0034] S1 Pre-cutting step: A pre-cutting line 41 is formed at the tail end of the first membrane material 4;

[0035] S2 Joining step: The non-adhesive surface at the tail end of the first membrane material 4 is overlapped with the adhesive surface at the head end of the second membrane material 51 to form an overlap area, and a 2-3 mm wide joining part 6 is formed in the middle of the overlap area along the pre-cut line 41.

[0036] S3 Cutting Step: Cut off the unjoined portion at the tail end of the first membrane material 4 and the unjoined portion at the head end of the second membrane material 51.

[0037] Since the required length of the strip roll sometimes exceeds the rated length of the membrane roll, an additional joining step is necessary. The existing joining process typically involves joining and rewinding multiple wound strip rolls after the membrane material has been slit to obtain the required length of new strip roll. However, the narrow width of the slit strips makes alignment difficult during operation, increasing the operational complexity, raising the joint defect rate, and adding an extra joining and rewinding step, thus wasting manpower and resources.

[0038] In a membrane slitting machine, a roll of membrane material is mounted on a conveyor shaft. When the previous roll of membrane material is about to be slitted, the next roll of membrane material is mounted on the conveyor shaft in preparation for slitting. Therefore, in this application, the membrane material on the roll of membrane material that is about to be slitted is referred to as the first membrane material 4, and the membrane material on the next roll of membrane material mounted on the conveyor shaft in preparation for slitting is referred to as the second membrane material 51.

[0039] The joining method of this application is to join the tail end of the first membrane material 4 with the head end of the second membrane material 51 that is about to be cut before the tail end of the first membrane material 4 is cut. After the joining is completed, the membrane material cutting equipment continues to cut the tail end of the first membrane material 4 and the second membrane material 51 on the joined second membrane material roll 5, thereby obtaining a new strip roll of the required length. This reduces the steps of joining and rewinding multiple strips separately after cutting, saves manpower and resources, and improves joining efficiency and joining yield.

[0040] The specific operation is as follows: First, the non-adhesive side of the first membrane material 4 faces upward, and a pre-cut line 41 is formed at the tail end of the uncut first membrane material 4. Then, the adhesive side of the second membrane material 51 faces downward and overlaps with the non-adhesive side of the first membrane material 4 to form an overlapping area. A 2-3 mm wide joint 6 is formed in the middle of the overlapping area along the pre-cut line 41. Finally, the unjoined portion at the tail end of the first membrane material 4 is cut off along the pre-cut line 41, and the unjoined portion at the head end of the second membrane material 51 is also cut off. (See reference...) Figure 1 .

[0041] This application achieves the requirement that the joint size be ≤3mm while ensuring joint strength by forming a 2-3mm wide joining portion 6 in the middle of the overlapping area. By forming a pre-cut line 41 on the first membrane material 4, excess membrane material at the unjoined end of the first membrane material 4 can be easily removed after the joining step. Without the pre-cut line 41, the operation would be inconvenient, the flatness of the joining portion 6 boundary could not be guaranteed, affecting the joining quality, and could even lead to the 2-3mm wide joining portion 6 being torn apart. Simultaneously, the joining portion 6 is formed along the pre-cut line 41 in the middle of the overlapping area, meaning the boundary of the joining portion 6 near the end of the first membrane material 4 is flush with the pre-cut line 41, ensuring the flatness of the joining portion 6 boundary, improving the joining effect, and eliminating the need for secondary trimming and removal of the pre-cut line 41, thus improving joining efficiency.

[0042] Furthermore, in an embodiment of this bonding method, the pre-cut line 41 does not extend completely in the width direction of the first film material 4, but is formed by cutting along the width direction of the middle portion of the first film material 4 excluding the two sides of the width, see reference. Figure 1 Preferably, the length of the uncut portions on both sides of the wide section is 2-5mm. This ensures the smooth progress of the joining step and facilitates the removal of the unjoined portion of the first membrane material at the tail end during the trimming step, making it easy to operate. The pre-cut line 41 can be completely or partially cut, preferably completely, to facilitate the removal of the unjoined portion of the first membrane material at the tail end during the trimming step.

[0043] In this embodiment of the bonding method, the bonding portion 6 is formed by heat bonding. The overlapping area formed by pressing the non-adhesive surface of the tail end of the first film material 4 and the adhesive surface of the head end of the second film material 51 is fixed, and then the non-adhesive surface of the tail end of the first film material 4 and the adhesive surface of the head end of the second film material 51 are heat-bonded to form the bonding portion 6.

[0044] Furthermore, an embodiment of the present invention provides a method for bonding membrane materials with an adhesive layer, which further includes the following steps:

[0045] S4 Secondary bonding step: Press and heat bond the bonding part 6 again.

[0046] By performing a secondary bonding step, after removing the unbonded portion at the tail end of the first membrane material 4 and the unbonded portion at the head end of the second membrane material 51, the bonding strength of the bonding portion 6 is strengthened, further improving the bonding effect between the tail end of the first membrane material 4 and the head end of the second membrane material 51 in this bonding method.

[0047] Embodiments of the present invention also provide a film bonding apparatus with an adhesive layer to achieve the above-described bonding method. The bonding apparatus includes a fixing frame 1, a bonding mechanism disposed on the fixing frame 1, and a control mechanism 7 for controlling the bonding mechanism. The bonding mechanism includes a bonding assembly 2 forming a pre-cut line 41 and a bonding portion 6, and a pressing assembly 3. (See reference...) Figure 2 In this application, the membrane bonding device includes a fixing frame 1, a bonding mechanism, and a control mechanism 7. Both the bonding mechanism and the control mechanism 7 are mounted on the fixing frame. The control mechanism 7 is electrically connected to the bonding mechanism, thereby controlling the bonding mechanism to bond the tail end of the first membrane 4 to the head end of the second membrane 51. A pre-cut line 41 can be formed at the tail end of the first membrane 4 through the bonding mechanism.

[0048] Specifically, the joining mechanism includes a joining component 2 and a pressing component 3. When joining the tail end of the first film material 4 with the head end of the second film material 51, the non-adhesive side of the tail end of the first film material 4 is first fixed on the joining component 2 with the non-adhesive side facing upward, and a pre-cut line 41 is formed at the tail end of the first film material 4 by the joining component 2. Then, the adhesive side of the head end of the second film material 51 is placed on the non-adhesive side of the tail end of the first film material 4 with the adhesive side facing downward. Then, the pressing component 3 is controlled by the control mechanism 7 to press the tail end of the first film material 4 with the head end of the second film material 51.

[0049] When the pressing assembly 3 presses the first membrane material 4 and the second membrane material 51 together, the control mechanism 7 controls the joining assembly 2 to form a 2-3mm wide joining portion 6 in the middle of the overlapping area between the tail end of the first membrane material 4 and the head end of the second membrane material 51 along the pre-cut line 41. Finally, the unjoined portion of the tail end of the first membrane material 4 is cut off along the pre-cut line 41, and the unjoined portion of the head end of the second membrane material 51 is also cut off, thereby completing the joining of the tail end of the first membrane material 4 and the head end of the second membrane material 51. While meeting the requirement that the joint size of the joined portion is ≤3mm, the joining strength is guaranteed, and the joining of the membrane materials is convenient, quick, and easy to operate, thereby improving the joining efficiency and joining yield, eliminating the joining and rewinding step, and saving manpower and resources.

[0050] In an embodiment of the present invention, the fixing frame 1 includes a top layer support 11, a middle layer support 12, and a bottom layer support 13. A pressing assembly 3 is disposed on the top layer support 11, and a joining assembly 2 is disposed on the middle layer support 12. A receiving cavity 15 is provided between the middle layer support 12 and the bottom layer support 13. The receiving cavity 15 is used to receive the second film roll 5 providing the second film material 51. (See reference...) Figure 3 In this application, the fixing frame 1 is an "E"-shaped fixing frame 1 with a bottom support 13, a middle support 12 and a top support 11. A receiving cavity 15 is provided between the middle support 12 and the bottom support 13. When the tail end of the first membrane material 4 and the head end of the second membrane material 51 are joined, the second membrane material roll 5 is located in the receiving cavity 15.

[0051] The bonding assembly 2 is mounted on the middle support 12, so that the bonding assembly 2 is located above the second film roll 5. Therefore, the non-adhesive side of the tail end of the first film 4 can be fixed to the bonding assembly 2 first, and after the bonding assembly 2 forms a pre-cut line 41 at the tail end of the first film 4, the adhesive side of the first end of the second film 51 located below the bonding assembly 2 is pulled to the bonding assembly 2 so that the adhesive side of the first end of the second film 51 covers the non-adhesive side of the tail end of the first film 4.

[0052] The pressing assembly 3 is mounted on the top support 11, thus positioning it above the joining assembly 2. When the tail end of the first film material 4 overlaps with the head end of the second film material 51 on the joining assembly 2, the pressing assembly 3 is lowered on the top support 11 by the control mechanism 7, pressing the tail end of the first film material 4 and the head end of the second film material 51 from above. Simultaneously, the control mechanism 7 controls the joining assembly 2 to heat, thermally bonding the non-adhesive surface of the tail end of the first film material 4 with the adhesive surface of the head end of the second film material 51. Thus, through pressing and thermal bonding, a 2-3 mm wide joining portion 6 is formed along the pre-cut line 41 in the middle of the overlapping area between the tail end of the first film material 4 and the head end of the second film material 51.

[0053] In an embodiment of the present invention, the fixing frame 1 further includes a plurality of casters 14 disposed at the bottom of the bottom support 13. The plurality of casters 14 are used to enable the fixing frame 1 to move. See reference. Figure 3 In this application, the mounting bracket 1 also includes a plurality of casters 14, which are disposed at the bottom of the bottom support 13, and the mounting bracket 1 can be moved by means of the plurality of casters 14.

[0054] When the first roll of film material 4 is about to be cut and the second roll of film material 5 is mounted on the conveyor shaft for cutting, the fixing frame 1 is moved to the position of the film material cutting equipment by the caster wheel 14, so that the second roll of film material 5 is located in the receiving cavity 15 of the fixing frame 1. At this time, the tail end of the first film material 4 is still in an uncut state. Therefore, the tail end of the first film material 4 forms a pre-cut line 41, and is superimposed on the head end of the second film material 51 on the joining assembly 2. The tail end of the first film material 4 and the head end of the second film material 51 are pressed together by the pressing assembly 3, and the joining assembly 2 is heated so that the non-adhesive surface of the tail end of the first film material 4 and the adhesive surface of the head end of the second film material 51 are thermally bonded along the pre-cut line 41 to form a joining part 6. The boundary of the tail end of the first film material 4 in the joining part 6 is flush with the pre-cut line 41, so that the film joining device can complete the joining step before the film material cutting step, thereby making the joining of film materials convenient and quick, easy to operate, improving the joining efficiency and joining yield, and saving manpower and material resources.

[0055] It is foreseeable that the caster wheel 14 in this application also has a locking function. When the fixing frame 1 moves to the designated position, it is locked by the caster wheel 14, thereby fixing the fixing frame 1 and preventing the fixing frame 1 from moving during the joining process, which would affect the joining yield of the first membrane material 4 and the second membrane material 51.

[0056] In an embodiment of the present invention, the pressing assembly 3 includes a lifting platform 31 disposed at the bottom of the top support 11, and a pressure plate 32 fixed to the bottom of the lifting platform 31. The lifting platform 31 is used to drive the pressure plate 32 to move up and down, and the pressure plate 32 is used to press the non-adhesive surface at the tail end of the first film 4 and the adhesive surface at the head end of the second film 51 together. See reference. Figure 3 In this application, the pressing assembly 3 includes a lifting platform 31 and a pressure plate 32. The lifting platform 31 is fixedly installed at the bottom of the top support 11, and the pressure plate 32 is fixedly installed at the bottom of the lifting platform 31.

[0057] When joining the tail end of the first membrane material 4 with the head end of the second membrane material 51, the lifting platform 31 drives the pressure plate 32 to descend above the joining assembly 2, so that the pressure plate 32 can press the tail end of the first membrane material 4 and the head end of the second membrane material 51 stacked on the joining assembly 2; after the tail end of the first membrane material 4 and the tail end of the second membrane material 51 are joined, the lifting platform 31 drives the pressure plate 32 to rise, so that the pressure plate 32 leaves the surface of the joining assembly 2, waiting for the next pressing action.

[0058] In practical applications, the lifting platform 31 of this application can be configured as a telescopic cylinder. The fixed end of the telescopic cylinder is fixedly installed at the bottom of the top bracket 11, and the pressure plate 32 is fixed at the bottom of the telescopic rod of the telescopic cylinder. The telescopic cylinder extends and retracts, driving the pressure plate 32 to rise and fall above the connecting assembly 2, thereby making the lifting action of the pressure plate 32 more stable and reliable, and easier to implement.

[0059] Furthermore, in an embodiment of the present invention, the pressure plate 32 is a soft rubber strip with a surface covered with high-temperature resistant tape to ensure that the pressure plate 32 and the film material are completely adhered during pressing. The high-temperature resistant tape is used to protect the surface of the soft rubber strip and extend the service life of the strip.

[0060] In an embodiment of the present invention, the bonding assembly 2 includes a heating portion 21 that forms the pre-cut line 41 and is heatable, and support portions 22 on both sides of the heating portion 21 for supporting the film material, see reference. Figure 4 In this application, the joining assembly 2 includes a heating part 21 and a support part 22. The heating part 21 is disposed in the middle, and the support parts 22 are disposed on both sides of the heating part 21.

[0061] When joining the tail end of the first film material 4 to the head end of the second film material 51, the tail end of the first film material 4 is first pulled from the outside of one side support 22 to the heating part 21 and fixed. Then, a pre-cut line is formed at the tail end of the first film material 4 through the heating part 21. Next, the head end of the second film material 51 is pulled from the outside of the other side support 22 to the heating part 21, so that the head end of the second film material 51 covers the tail end of the first film material 4. Thus, when the heating part 21 heats, the non-adhesive surface of the tail end of the first film material 4 and the adhesive surface of the head end of the second film material 51 are thermally bonded.

[0062] In actual operation, in order to better thermally bond the non-adhesive surface of the tail end of the first film material 4 and the adhesive surface of the head end of the second film material 51 to the heating part 21, when the tail end of the first film material 4 is pulled from the outside of one side support 22 to the heating part 21, it usually passes over the heating part 21 and continues to be pulled to the other side support 22 and fixed, so that the tail end of the first film material 4 covers the heating part 21. When the head end of the second film material 51 is pulled from the outside of the other side support 22 to the heating part 21, it usually also passes over the heating part 21, so that the adhesive surface of the head end of the second film material 51 and the non-adhesive surface of the tail end of the first film material 4 cover the heating part 21, thus achieving the overlap of the tail end of the first film material 4 and the head end of the second film material 51 on the bonding assembly 2.

[0063] In this application, the support portion 22 can be made of a ferromagnetic material such as iron. When the tail end of the first membrane material 4 is pulled from the outside of one side support portion 22 to the other side support portion 22, the tail end of the first membrane material 4 is fixed to the other side support portion 22 by a magnetic strip.

[0064] In an embodiment of the present invention, the heating part 21 includes a heating strip 211 and a support strip 212, and a cutting slit 213 is provided between the heating strip 211 and the support strip 212 to form a pre-cut line 41. (See reference...) Figure 5 In this application, the heating part 21 includes a heating strip 211 and a support strip 212, with a cutting slit 213 provided between the heating strip 211 and the support strip 212. When the pressing assembly 3 presses the tail end of the first film material 4 with the head end of the second film material 51, the non-adhesive surface of the tail end of the first film material 4 and the adhesive surface of the head end of the second film material 51 are thermally bonded by the heating of the heating strip 211, thereby forming a joint part 6 at the portion where the heating part of the first film material 4 and the second film material 51 overlaps with the heating part of the heating strip 211.

[0065] A pre-cut line can be pre-cut at the tail end of the first membrane material 4, extending beyond the joint portion 6, through the cutting slit 213 located between the heating strip 211 and the support strip 212. Since in this application, the pre-cut line 41 is formed by cutting along the width direction in the middle portion of the first membrane material 4 excluding the wide sides, it is foreseeable that the length of the cutting slit 213 should be less than the width of the first membrane material 4, and preferably, the two ends of the cutting slit 213 are 2-5 mm away from the wide sides of the first membrane material 4.

[0066] In this application, the width of the cutting slit 213 is not particularly limited, as long as it facilitates cutting and forms the pre-cut line 41, for example, it can be 0.20-0.50mm. The pre-cut line 41 makes it easier to remove the excess part of the first membrane material 4 that extends beyond the joint 6, thus making the use of this device simpler and more convenient, and the appearance of the joint between the first membrane material 4 and the second membrane material 51 is more aesthetically pleasing, which facilitates subsequent rewinding operations.

[0067] In an embodiment of the present invention, the heating part 21 can move between the two side support parts 22, see reference. Figure 1 and Figure 4 In this application, with the frontal view as the reference, two support parts 22 are respectively arranged on the front and rear sides of the heating part 21. The heating part 21 can move between the two support parts 21, that is, the heating part 21 can move back and forth. By moving the heating part 21 back and forth, the position of the heating part 21 can be adjusted, thereby ensuring that the joining part 6 can be formed in the middle of the overlapping area formed by the non-adhesive surface at the tail end of the first film 4 and the adhesive surface at the head end of the second film 51 along the pre-cut line 41, thereby ensuring the joining effect between the tail end of the first film 4 and the head end of the second film 51.

[0068] In practical applications, the specific implementation of the heating part 21 moving back and forth between the two support parts 22 can be as follows: the connecting assembly 2 includes two support parts 22 on both sides and a connecting part 23 connecting the two support parts 22. A moving channel is provided between the two support parts 22 and the connecting part 23, and the heating part 21 is disposed in the moving channel. The heating part 21 is provided with a threaded hole, and the connecting part 23 is provided with a through hole. One end of a bolt 24 passes through the through hole from the outside of the connecting part 23 and is screwed into the threaded hole on the heating part 21. Thus, when the nut of the bolt 24 does not abut against the outer surface of the connecting part 23, the heating part 21 can move back and forth in the moving channel; when the nut of the bolt 24 abuts against the outer surface of the connecting part 23, the heating part 21 is fixed in the moving channel.

[0069] In an embodiment of the present invention, a high-temperature resistant tape is attached to the surface of the heating strip 211. The high-temperature resistant tape is used to make the tail end of the first film material 4 flexibly contact the heating strip 211. In this application, the high-temperature resistant tape attached to the surface of the heating strip 211 ensures excellent heating performance of the heating strip 211 while giving the surface of the heating strip 211 a certain degree of flexibility. Thus, when the pressure plate 32 presses the first film material 4 and the second film material 51 together, the first film material 4 can be completely adhered to the heating strip 211, thereby improving the firmness of the bond between the first film material 4 and the second film material 51.

[0070] In an embodiment of the present invention, the heating strip 211 includes a heatable strip-shaped soldering iron 2111 and a clamping strip 2112 disposed on one side of the strip-shaped soldering iron to separate the strip-shaped soldering iron 2111 from the cutting slit 213. The width of the strip-shaped soldering iron 2111 is the same as the width of the joint portion 6. (See reference...) Figure 1 and Figure 5 The heating strip 211 includes a strip-shaped soldering iron 2111 and a clamping strip 2112. By heating with the strip-shaped soldering iron 2111, the overlapping parts of the first film material 4 and the second film material 51 with the area where the strip-shaped soldering iron 2111 is located are thermally bonded. The overlapping parts of the first film material 4 and the second film material 51 with the area where the strip-shaped soldering iron 2111 is located are the joint parts 6 of the first film material 4 and the second film material 51.

[0071] Because the surface of the heating strip 211 is covered with high-temperature tape, its surface is higher than that of the support strip 212. If the soldering iron 2111 is located at the boundary of the cutting seam 213, the height difference will cause unevenness at the joint 6 of the first membrane material 4 and the second membrane material 51, thus affecting the bonding effect between the tail end of the first membrane material 4 and the head end of the second membrane material 51. Even without the high-temperature tape, the presence of the cutting seam 213 will still affect the bonding effect to some extent.

[0072] Therefore, in this application, a clamping strip 2112 is provided on the side of the strip soldering iron 2111 near the cutting seam 213, which separates the strip soldering iron 2111 from the cutting seam 213. Since there is no height difference between the clamping strip 2112 and the strip soldering iron 2111, the thermal bonding of the film material is ensured to occur on a flat surface, thereby ensuring the bonding effect between the tail end of the first film material 4 and the head end of the second film material 51.

[0073] Since in this application, the width of the joint 6 between the tail end of the first membrane material 4 and the head end of the second membrane material 51 is equal to the width of the strip soldering iron 2111, in order to form a joint 6 with a width of 2-3 mm in the middle of the overlapping area, the width of the strip soldering iron 2111 can be set to 2-3 mm to meet the client's requirements.

[0074] Furthermore, in this application, the width of the pressure plate 32 is preferably 4-6mm to ensure that the pressure plate 32 can completely cover the strip soldering iron 2111 without wasting too much production material, thereby improving the bonding strength and bonding yield of the film material and reducing production costs.

[0075] In this application, when the first film material 4 and the second film material 51 are thermally bonded by the strip soldering iron 2111, the heating time of the strip soldering iron 2111 needs to be set first so that the strip soldering iron 2111 stops heating after the specified heating time, in order to prevent the temperature of the strip soldering iron 2111 from being too high and damaging the first film material 4 and the second film material 51, resulting in appearance defects of the film material and affecting its use.

[0076] It is foreseeable that the heating time of the strip soldering iron 2111 should not be too long or too short. If the heating time is too long, the strip soldering iron 2111 may overheat, damaging the first film material 4 and the second film material 51, resulting in appearance defects and affecting the use of the film materials. Conversely, if the heating time is too short, the thermal bonding strength of the first film material 4 and the second film material 51 will be insufficient, also affecting the subsequent use of the film materials. In this application, the preferred heating time for the strip soldering iron 2111 is 2-4 seconds, ensuring the bonding effect of the film materials while avoiding appearance defects caused by overheating.

[0077] Because a clamping strip 2112 is provided between the strip soldering iron 2111 and the cutting seam 213, and the relative positions of the strip soldering iron 2111 and the cutting seam 213 are fixed, the pre-cutting line 41 formed along the cutting seam 213 in the overlapping area of ​​the tail end of the first film 4 and the head end of the second film 51 cannot guarantee that the boundary of the joint 6 near the tail end of the first film 4 is flush with the pre-cutting line 41. That is, it cannot guarantee the flatness of the boundary of the joint 6 after removing the unjoined part of the tail end of the first film 4 along the pre-cutting line 41. The part of the pre-cutting line 41 needs to be modified and removed again, which reduces the joining efficiency.

[0078] Therefore, based on the above embodiments, the heating part 21 can move between the two support parts 22. In this application, the boundary of the joining part 6 near the tail end of the first film 4 is flush with the pre-cut line 41 by the two movements of the heating part 21 between the two support parts 22. In this application, when the first film 4 is pulled from one support part 22 to the joining assembly 2, and the second film 51 is pulled from the other support part 22 to the joining assembly 2, there are two implementations for the relative positions of the support strip 212 and the heating strip 211 in the moving channel. Therefore, there are also two implementations for the boundary of the joining part 6 near the tail end of the first film 4 to be flush with the pre-cut line 41 by the two movements of the heating part 21 between the two support parts 22. The side of the moving channel near the pulling direction of the first film 4 is taken as the first boundary 221, and the side of the moving channel near the pulling direction of the second film 51 is taken as the second boundary 222.

[0079] The first implementation is as follows: the heating strip 211 is set on the side close to the traction direction of the first membrane material 4, and the support strip 212 is set on the side close to the traction direction of the second membrane material 51. In this case, in order to make the pre-cut line 41 flush with the boundary of the joint part 6 on the side close to the tail end of the first membrane material 4, the heating part 21 needs to be moved towards the first boundary 221, and the moving distance is equal to the width of the clamping strip 2112.

[0080] After pre-cutting a pre-cut line 41 along the cutting seam 213 on the first film material 4, the heating part 21 is moved towards the second boundary 222 to the initial position. At this time, the pre-cut line 41 is located on the boundary of the strip soldering iron 2111 near the tail end of the first film material 4. Then, the first film material 4 and the second film material 51 are thermally bonded by the strip soldering iron 2111. At this time, the position of the strip soldering iron 2111 is the position of the joint 6 of the first film material 4 and the second film material 51, thereby achieving that the pre-cut line 41 is flush with the boundary of the joint 6 near the tail end of the first film material 4. (See reference...) Figure 6 .

[0081] Furthermore, in this application, the distance that the heating part 21 can move in the moving channel is equal to the width of the clamping strip 2112. When the pre-cut line 41 is aligned with the boundary of the joint portion 6 near the tail end of the first film material 4, the heating part 21 is first moved towards the first boundary 221 until the heating part 21 is in contact with the first boundary 221. After the pre-cut line 41 is pre-cut on the first film material 4 along the cutting seam 213, the heating part 21 is then moved towards the second boundary 222 until the heating part 21 is in contact with the second boundary 222. At this time, after the first movement and the second movement of the heating part 21, the relative displacement of the cutting seam 213 is exactly equal to the width of the clamping strip 2112. (See reference...) Figure 6 This not only makes the use of this device more convenient and faster, but also makes the positioning of the pre-cut line 41 more accurate.

[0082] The second implementation is as follows: the support strip 212 is set on the side close to the first film material traction direction, and the heating strip 211 is set on the side close to the second film material traction direction. In this case, in order to make the pre-cut line 41 flush with the boundary of the joint part 6 on the side close to the tail end of the first film material 4, the heating part 21 needs to be moved towards the second boundary 222 first, and the moving distance is equal to the sum of the widths of the clamping strip 2112 and the strip soldering iron 2111.

[0083] After pre-cutting a pre-cut line 41 along the cutting seam 213 on the first film material 4, the heating part 21 is moved towards the first boundary 221 to the initial position. At this time, the pre-cut line 41 is located on the boundary of the strip soldering iron 2111 near the tail end of the first film material 4. Then, the first film material 4 and the second film material 51 are thermally bonded by the strip soldering iron 2111. At this time, the position of the strip soldering iron 2111 is the position of the joint 6 of the first film material 4 and the second film material 51, thereby achieving that the pre-cut line 41 is flush with the boundary of the joint 6 near the tail end of the first film material 4. (See reference...) Figure 7 .

[0084] Furthermore, in this application, the distance that the heating part 21 can move in the moving channel is equal to the sum of the widths of the clamping strip 2112 and the strip soldering iron 2111. When the pre-cut line 41 is aligned with the boundary of the joint portion 6 near the tail end of the first film material 4, the heating part 21 is first moved towards the second boundary 222 until the heating part 21 is in contact with the second boundary 222. After the pre-cut line 41 is pre-cut on the first film material 4 along the cutting seam 213, the heating part 21 is then moved towards the first boundary 221 until the heating part 21 is in contact with the first boundary 221. At this time, the relative displacement of the heating part 21 after the first movement and after the second movement is exactly equal to the width of the clamping strip 2112. See reference. Figure 7 This not only makes the use of this device more convenient and faster, but also makes the positioning of the pre-cut line 41 more accurate.

[0085] The two implementation methods described above can be freely selected according to the actual production situation.

[0086] Taking the first embodiment of this invention as an example, this application also provides a bonding method for a membrane bonding device with an adhesive layer, specifically including the following steps:

[0087] S1: Move the fixing frame 1 to the location of the film cutting equipment so that the second film roll 5 is located in the receiving cavity 15 of the fixing frame 1;

[0088] S2: Move the heating part 21 toward the first boundary 221 until the heating part 21 is in contact with the first boundary 221;

[0089] S3: Pull the tail end of the first membrane material 4 from the outside of one side support 22 to the other side support 22, with the non-adhesive side of the first membrane material 4 facing upward, and fix the tail end of the first membrane material 4 to the other side support 22 with a magnetic strip.

[0090] S4: The first membrane material 4, after being fixed, is pre-cut along the cutting seam 213 to form a pre-cut line 41;

[0091] S5: Move the heating part 21 toward the second boundary 222 until the heating part 21 is in contact with the second boundary 222;

[0092] S6: Pull the first end of the second membrane 51 from the outside of the other side support 22 onto the first membrane 4, so that the adhesive side of the second membrane 51 covers the non-adhesive side of the first membrane 4 with the adhesive side facing down, and ensure that the area covered by the second membrane 51 on the first membrane 4 is at least beyond the area where the strip soldering iron 2111 is located.

[0093] S7: Lower the pressure plate 32 so that the pressure plate 32 presses the second membrane material 51 and the first membrane material 4 together above the second membrane material 51;

[0094] S8: Set the heating time and start the heating strip 211 to heat the non-adhesive surface at the tail end of the first film material 4 and the adhesive surface at the head end of the second film material 51.

[0095] S9: After the set time is reached, the heating bar 211 stops heating, and the pressure plate 32 rises to the initial position, completing the first bonding of the first membrane material 4 and the second membrane material 51;

[0096] S10: Cut the first membrane material 4 completely along the pre-cut line 41, remove the excess part of the first membrane material 4 that extends beyond the joint 6, and at the same time fold the second membrane material 51 that extends beyond the joint 6 along the boundary of the joint 6 and cut off the excess membrane material.

[0097] S11: Lower the pressure plate 32 so that the pressure plate 32 presses the cut second membrane 51 and the first membrane 4 together above the second membrane 51;

[0098] S12: Set the heating time and start the heating strip 211 to heat the first film material 4 and the second film material 51 after cutting.

[0099] S13: After the set time is reached, the heating bar 211 stops heating, the pressure plate 32 rises to the initial position, and the second bonding of the first membrane material 4 and the second membrane material 51 is completed;

[0100] S14: Move the fixing frame 1 away from the location of the membrane cutting equipment to complete the joining of the first membrane 4 and the second membrane 51.

[0101] In the second embodiment of this invention, the bonding method of the film bonding device with adhesive layer provided by this application has the same steps as above, except that in step S2, the heating part 21 is moved toward the first boundary 221 until the heating part 21 is in contact with the first boundary 221, and the heating part 21 is moved toward the second boundary 222 until the heating part 21 is in contact with the second boundary 222; and in step S5, the heating part 21 is moved toward the second boundary 222 until the heating part 21 is in contact with the second boundary 222, and the heating part 21 is moved toward the first boundary 221 until the heating part 21 is in contact with the first boundary 221.

[0102] The above-described contents can be implemented individually or in various combinations, and these variations are all within the protection scope of this invention.

[0103] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A membrane bonding device with an adhesive layer, wherein the tail end of a first membrane (4) is bonded to the head end of a second membrane (51), characterized in that, include: A fixing frame (1), a joining mechanism disposed on the fixing frame (1), and a control mechanism (7) for controlling the joining mechanism, the joining mechanism including a joining component (2) and a pressing component (3). The bonding assembly (2) forms a pre-cut line (41) at the tail end of the first membrane material (4). When the pressing assembly (3) overlaps the adhesive surface at the first end of the second film material (51) with the non-adhesive surface at the last end of the first film material (4) to form an overlapping area, it works in conjunction with the joining assembly (2) to form a 2-3 mm wide joining portion (6) in the middle of the overlapping area along the pre-cut line (41). The bonding assembly (2) includes a heating part (21) that forms the precut line (41) and is heatable, and a support part (22) disposed on both sides of the heating part (21) for supporting the membrane material. The heating part (21) includes a heating strip (211) and a support strip (212), and a cutting slit (213) is provided between the heating strip (211) and the support strip (212) to form the pre-cut line (41). The heating part (21) is movable between the two support parts (22). The connecting assembly (2) also includes a connecting part (23) connecting the two support parts (22). A moving channel is provided between the two support parts (22) and the connecting part (23). The heating part (21) is disposed in the moving channel. The heating part (21) is provided with a threaded hole. The connecting part (23) is provided with a through hole. After one end of the bolt (24) passes through the through hole from the outside of the connecting part (23), it is screwed to the threaded hole on the heating part (21).

2. The membrane bonding device with an adhesive layer as described in claim 1, characterized in that: The pre-cut line (41) is formed by cutting along the width direction of the first membrane material (4), excluding the middle portion on both sides of the width.

3. The membrane bonding device with an adhesive layer as described in claim 1, characterized in that: The joint (6) is formed by heat bonding.

4. The membrane bonding device with an adhesive layer as described in claim 1, characterized in that: The heating strip (211) includes a heatable strip soldering iron (2111) with the same width as the joint portion (6), and a clamping strip (2112) disposed on one side of the strip soldering iron (2111) to separate the strip soldering iron (2111) from the cutting seam (213).

5. A membrane bonding device with an adhesive layer as described in claim 1, characterized in that: The pressing assembly (3) is disposed above the joining assembly (2), and includes a lifting platform (31) and a pressure plate (32) fixed at the bottom of the lifting platform (31). The lifting platform (31) drives the pressure plate (32) to move up and down.

6. A membrane bonding device with an adhesive layer as described in claim 5, characterized in that: The pressure plate (32) is a soft rubber strip with a surface covered with high-temperature resistant tape.

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