A method, apparatus and system for connecting spacer paper

Abstract

This application discloses a method, apparatus, and system for connecting spacer paper, belonging to the field of electronic glass packaging technology. It includes: setting a vertical clamping plate and a horizontal clamping plate at the inlet of a paper cutter; cutting the old paper roll before it runs out, clamping the end of the old paper with the vertical clamping plate; overlapping the beginning end of the new paper with the end of the old paper, pulling it out from the horizontal clamping plate and clamping it in place; using a sewing machine to sew the overlapping new and old spacer paper together along the edge of the horizontal clamping plate; and releasing the clamping plate to complete the connection. The apparatus includes a vertical clamping plate and a horizontal clamping plate below it, the horizontal clamping plate having a straight edge as a sewing guide surface. This application, by adding a horizontal clamping plate and combining it with a sewing machine for glue-free sewing, completely solves the problem of adhesive contamination caused by tape connections; by optimizing sewing parameters and paper folding methods, it ensures connection strength; the paper changing operation is reduced to one person's independent operation, shortening the time, significantly improving production efficiency, and ensuring the yield rate of glass products.

Description

Technical Field

[0001] This application belongs to the field of electronic glass substrate packaging technology, and specifically relates to a method, apparatus and system for connecting spacer paper. Background Technology

[0002] During the production and packaging of electronic glass substrates, a clean spacer paper is placed between each layer of glass to prevent scratches from friction between the glass layers. The spacer paper is installed in rolls on a paper cutter, and a new roll must be quickly connected when a roll is about to be used up to ensure continuous production.

[0003] Currently, the industry commonly uses tape to replace paper rolls: the old paper is cut and fixed with cardboard clips, then 2-3 people work together to use 3M tape to stick the ends of the old and new paper together. The paper cutter is then started, and the old paper pulls the new paper through the roller to complete the paper replacement. This method usually takes 15-20 minutes and is labor-intensive with limited operating space.

[0004] More seriously, when the tape joint passes through the paper cutter roller, the pressure can cause adhesive to overflow, adhering to the roller surface and contaminating the spacer paper that subsequently passes through. When the contaminated spacer paper comes into contact with the glass substrate, the adhesive transfers to the glass surface, causing defects such as white spots and adhesion, and even rendering the entire batch of products unusable. Therefore, how to achieve a rapid, adhesive-free connection between new and old spacer paper is a pressing technical problem that needs to be solved in this field. Summary of the Invention

[0005] The purpose of this application is to provide a method, apparatus, and system for connecting spacer paper. This addresses the problems of adhesive tape connection methods in the prior art, as described in the background section, which easily lead to adhesive contamination and low operational efficiency.

[0006] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, this application provides a method for connecting spacer paper rolls for replacing electronic glass packaging rolls on a paper cutter, comprising the following steps: S1: Provides a paper cutter inlet, which is equipped with vertical and horizontal clamping plates; S2: Before the old spacer roll is used up, cut it and clamp the end of the old paper with the vertical clamping board; S3: Overlap the starting end of the new spacer roll with the end of the old paper, and pull them together a distance from the horizontal clamping plate. Then, use the horizontal clamping plate to clamp and fix the overlapping part. S4: Using a sewing machine, proceed along the edge of the horizontal cardboard to sew the overlapping new and old spacer sheets together; S5: Release the vertical and horizontal clamping paper to complete the connection between the old and new spacer paper.

[0007] In one possible implementation, in step d, the sewing speed of the sewing machine is controlled to not exceed 5 cm / s, and the number of thread holes per 1 cm length on the sewn paper is not less than 5.

[0008] In one possible implementation, the sewing machine uses a needle with a diameter of 1-1.5 mm, and the sewing thread is nylon or PE thread with a diameter of 0.5-1 mm.

[0009] In one possible implementation, in step c, before stacking the new and old spacer sheets, the end edges of the new and old spacer sheets are folded inwards respectively, and then the folded double ends are stacked together to form a four-layer paper structure before clamping and sewing.

[0010] Secondly, this application provides a paper cutter inlet device for implementing the above method, comprising: Vertical clamping paper is installed at the entrance of the paper cutter to clamp the end of the old spacer paper; A horizontal clamping plate is positioned below the vertical clamping plate to clamp and fix the overlapping new and old spacer paper. The horizontal clamping plate has a straight edge, which serves as a guide surface during sewing by the sewing machine.

[0011] In one possible implementation, the horizontal clamping plate is fixedly or movably connected to the vertical clamping plate, and the clamping surface of the horizontal clamping plate is perpendicular to the clamping surface of the vertical clamping plate.

[0012] In one possible implementation, the vertical and / or horizontal clamping plates are clamped and released by a manual or automatic drive mechanism.

[0013] In one possible implementation, the width of the horizontal clamping paper is not less than the width of the spacer paper, so as to ensure that the paper in the overlapping portion is clamped evenly in the width direction.

[0014] Thirdly, this application provides a spacer paper connection system, including a paper cutter body, wherein the paper cutter body is provided with a paper cutter inlet device as described in any of the preceding claims at its inlet.

[0015] In one possible implementation, a handheld sewing machine is also included, which is used to sew the overlapping new and old spacer sheets together along the edge of the horizontal clipboard.

[0016] Compared with the prior art, this application has the following beneficial effects: This application provides a method for connecting spacer paper, which, through specific step design, forms a complete and standardized glue-free paper changing process. Compared with traditional tape connection methods, this method eliminates the problem of adhesive overflow caused by the tape being squeezed when passing through the paper cutter roller. It avoids defects such as adhesive sticking to the roller, contaminating subsequent spacer paper, and adhesive transfer to the surface of the electronic glass substrate, resulting in white spots and sticking. It effectively prevents the scrapping of entire batches of products due to adhesive contamination and significantly improves the yield rate of electronic glass substrate products.

[0017] In one possible implementation, by limiting the sewing speed of the sewing machine to no more than 5 cm / s and ensuring that there are no fewer than 5 thread holes per 1 cm of paper after sewing, the contact area between the sewing thread and the paper is greatly increased, effectively improving the tensile strength of the seam; at the same time, it avoids the problems of skipped stitches and broken threads caused by excessive sewing speed, thus achieving a balance between tensile strength and sewing quality.

[0018] In one possible implementation, by limiting the needle diameter to 1-1.5mm and the wire diameter to 0.5-1mm, and using nylon or PE thread, it is possible to ensure that the thread passes smoothly through the needle hole to achieve stable sewing, while also keeping the thread hole at a reasonable size to avoid paper damage. Nylon and PE threads have smooth surfaces and do not shed lint, which meets the cleanroom specifications for electronic glass production and will not cause secondary contamination to the spacer paper and glass substrate during sewing and paper feeding.

[0019] In one possible implementation, the end edges of the old and new spacer sheets are folded inwards and then overlapped to form a four-layer paper structure before being sewn together. This increases the stress-bearing layers at the joint from two to four, significantly improving tensile strength. Actual measurements show that the four-layer sewn structure using this folding method can withstand approximately 2.5 times the ultimate tensile force of a directly folded two-layer sewn structure, effectively preventing the paper from tearing at the seam during the paper cutter's traction process.

[0020] This application provides a paper cutter inlet device that adds a horizontal clamping plate to the existing vertical clamping plate of a traditional paper cutter inlet. The horizontal clamping plate has a straight edge as a sewing guide surface. This device has a simple structure and low modification cost, requiring no changes to the core structure of the paper cutter, enabling rapid upgrades to existing paper cutters. The straight edge of the horizontal clamping plate provides precise physical guidance for sewing in a bag sewing machine, ensuring straight stitches and avoiding uneven stress at the joints caused by stitch curvature, thus significantly improving the structural stability of the sewn joint. Simultaneously, the vertical arrangement of the horizontal and vertical clamping plates conforms to ergonomic operating requirements, reducing the difficulty of operation for the operator.

[0021] In one possible implementation, by setting the width of the horizontal clamping cardboard to be no less than the width of the spacer paper, the paper in the overlapping part is evenly clamped in the width direction, avoiding paper wrinkling and displacement problems caused by local insecure clamping during the sewing process, and ensuring sewing quality.

[0022] This application provides a paper-changing system that integrates the paper cutter body, the paper cutter inlet device, and the handheld sewing machine into a single, glue-free paper-changing system. All components work collaboratively to form a complete paper-changing operation system. Using this system, the entire paper-changing process can be completed independently by only one operator, without assistance from others. This completely solves the problem of requiring 2-3 people to pull the paper and apply the tape in traditional tape-connecting methods, significantly reducing labor costs. Field tests show that the entire operation time has been reduced from the traditional 15-20 minutes to 5-8 minutes, increasing efficiency by over 60%, effectively reducing production line downtime, and improving the overall production efficiency of the electronic glass packaging production line. Attached Figure Description

[0023] Figure 1 A side view of the paper cutter inlet device provided in an embodiment of this application; Figure 2 This is a schematic diagram showing the state of the old spacer paper being clamped by the vertical clamping paper in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the bag sewing machine provided in the embodiments of this application; Figure 4 This is a schematic diagram illustrating the state of sewing along the edge of the horizontal cardboard using a sewing machine in an embodiment of this application.

[0024] The attached diagram is labeled as follows: 2. Vertical clamping paper; 3. Horizontal clamping paper; 4. Old spacer paper; 5. New spacer paper; 6. Sewing machine; 61. Sewing needle; 7. Seam thread. Detailed Implementation

[0025] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] Example 1: As shown in Figure 4, this embodiment provides a paper cutter inlet device adapted to a paper cutter for electronic glass packaging. The device is installed at the core operating position of the inlet end of the paper cutter body and precisely docks with the paper feeding channel of the paper cutter body. Its core components include a vertical clamping plate 2 and a horizontal clamping plate 3. The two work together to position and clamp the new and old spacer paper, providing a stable operating basis for subsequent glueless sewing operations, and effectively solving the problems of paper positioning deviation and irregular sewing during traditional paper changing processes.

[0032] The vertical clamping plate 2 is a plate-shaped structure adapted to the width of the spacer paper used for electronic glass packaging. It is fixedly installed on the vertical operating surface at the entrance of the paper cutter. Its core function is to quickly clamp the free end of the old spacer paper 4 after it is manually cut, restricting the displacement of the old spacer paper 4 in the vertical direction. This completely prevents the traction mechanism inside the paper cutter from pulling the remaining part of the old paper into the machine, ensuring that the end of the old paper is always in an operable working position, and reserving sufficient operating space for the overlapping and connection of the new and old spacer papers. The clamping and releasing actions of the vertical clamping paperboard 2 can be flexibly configured with a drive mechanism according to the automation requirements of the actual production scenario. If it is applied to small and medium-sized production lines with low automation requirements, a manual clamping mechanism, such as a bolt-fastening type or a snap-fit ​​structure, can be used, which is convenient to operate and has low equipment modification costs. If it is applied to large electronic glass production bases and production lines with high automation requirements, an automatic drive mechanism, such as a cylinder-driven or electromagnet adsorption structure, can be configured to achieve rapid response in clamping and releasing, further improve paper changing efficiency, and can be linked with the control system of the paper cutter to achieve semi-automation of the operation.

[0033] The horizontal clamping plate 3 is fixedly installed directly below the vertical clamping plate 2. The installation positions of the two form a vertical spatial layout. Its width is not less than the maximum width of the spacer paper used for electronic glass packaging (2.5-3 meters), ensuring that the new and old spacer papers are evenly clamped in the width direction after being stacked, avoiding paper wrinkling and displacement problems caused by localized insecure clamping. The core function of the horizontal clamping plate 3 is to clamp and fix the stacked new and old spacer papers horizontally during the sewing operation. At the same time, it has a smooth and straight edge 31 on the side facing the operator. This straight edge 31 serves as a dedicated guide surface for the sewing machine 6 during sewing, providing physical limits for the uniform and straight movement of the sewing machine, ensuring the straightness of the sewing stitches, avoiding uneven stress at the joints caused by stitch bending, and greatly improving the structural stability of the sewn joint.

[0034] The horizontal clamping plate 3 and the vertical clamping plate 2 can be connected in either a fixed or movable manner depending on the actual equipment modification requirements. A fixed connection allows for welding or bolting to integrate them into a single structure, resulting in strong overall equipment stability and eliminating the need for additional positioning calibration. This is suitable for scenarios where the paper cutter's entry space is fixed. A movable connection allows for relative displacement between the two via hinges, slide rails, or other connecting components. This facilitates adjusting the clamping position based on the thickness and number of layers of the spacer paper, adapting to paper changing operations with different specifications of spacer paper and offering greater versatility. Regardless of the connection method, the clamping surfaces of the horizontal clamping plate 3 and the vertical clamping plate 2 always remain perpendicular, meeting ergonomic operating requirements, reducing operator difficulty, and improving operational convenience. The clamping and releasing drive method of the horizontal clamping plate 3 is compatible with that of the vertical clamping plate 2. It can be configured with a separate manual or automatic drive mechanism, or it can share a single linkage drive system with the vertical clamping plate 2 to achieve synchronous control of their clamping and releasing actions.

[0035] The paper cutter inlet device in this embodiment only requires the addition of a horizontal clamping plate 3 to the traditional paper cutter inlet. The equipment modification cost is low and the modification difficulty is small. There is no need to modify the core structure of the paper cutter body. It can realize the rapid upgrade and modification of existing paper cutters and is compatible with the existing production lines of various electronic glass manufacturing enterprises. It has strong practicality and promotion potential.

[0036] Example 2: This embodiment provides a method for connecting spacer paper using the paper cutter inlet device described in Embodiment 1. This method is a glue-free sewing connection process, completely eliminating the traditional tape connection method. It effectively solves the technical problem of glue overflow contaminating the roller, spacer paper, and electronic glass substrate, while simplifying the operation process and enabling a single person to complete the paper changing operation independently. The specific steps include: S1: Equipment preparation: In advance, check the status of the paper cutter's inlet device to ensure that the clamping surfaces of the vertical clamping plate 2 and the horizontal clamping plate 3 are flat and free of debris, and that the drive mechanism (manual / automatic) is operating normally and can achieve reliable clamping and releasing actions; at the same time, adjust the handheld sewing machine 6 to the working state, check whether the needle and thread are installed firmly, and confirm that the running speed of the sewing machine is adjustable, in order to prepare for subsequent sewing operations.

[0037] S2: Old Paper Cutting and Clamping When the remaining amount of old spacer paper roll on the paper cutter reaches the warning value and is about to run out, the operator uses a special cutting tool in the operating area at the paper cutter entrance to manually cut the old spacer paper 4 outside the clamping position of the vertical clamping plate 2. The cut should be straight to avoid uneven subsequent stacking due to a skewed cut. After cutting, immediately operate the drive mechanism of the vertical clamping plate 2 to quickly clamp the end of the old spacer paper 4, fixing the old paper vertically and preventing the traction rollers inside the paper cutter from pulling the old paper into the machine. This ensures that the end of the old paper is always in a stable and operable position, providing proper positioning for the stacking of new and old spacer paper.

[0038] S3: Overlapping and Horizontal Clamping of New and Old Paper The operator pulls the starting end of the new spacer roll from the unwinding device and overlaps the starting end of the new spacer 5 with the end of the old spacer 4 in the operating area above the horizontal clamping plate 3. During the overlap, ensure that the edges of the two sheets are aligned and the surfaces are flat and wrinkle-free to avoid uneven stress at the seam due to overlap misalignment. Then, pull the overlapped new and old spacers together 5-10cm from the clamping surface of the horizontal clamping plate 3. This reserved length provides sufficient operating space for subsequent sewing operations, ensuring that the sewing stitches completely cover the overlapped area and improving the tensile strength of the joint. After pulling out, operate the drive mechanism of the horizontal clamping plate 3 to quickly press down the horizontal clamping plate 3, horizontally clamping and fixing the overlapped paper. Utilizing the wide clamping surface of the horizontal clamping plate 3, ensure that the paper is evenly stressed in the width direction, thoroughly fixing the paper's position and preventing displacement during sewing.

[0039] S4: The operator holds the adjusted sewing machine 6 and aligns the sewing needle 61 with the edge of the stacked paper, ensuring the machine's direction of travel aligns with the straight edge 31 of the horizontal clamping plate 3. Using this straight edge 31 as a guide, the operator pushes the sewing machine 6 at a uniform speed to sew the stacked new and old spacer papers together. During the sewing process, the straight edge 31 of the horizontal clamping plate 3 provides strict physical restraint, ensuring the sewing machine always travels in a straight line, maintaining straight stitches, and avoiding localized stress concentration at the joint due to stitch curvature, effectively improving the structural stability of the sewn joint.

[0040] S5: After the paper clamping and replacement sewing operations are completed, the operator first operates the drive mechanism of the horizontal paper clamping 3 to release it, and then operates the drive mechanism of the vertical paper clamping 2 to release it. The operator then manually checks the stitching at the seam to ensure it is continuous, secure, and free of skipped stitches, broken threads, or torn paper. Once the seam is confirmed to be satisfactory, the traction system of the paper cutter is activated. Under the traction force, the old spacer paper 4 inside the paper cutter pulls the new spacer paper 5 through the rollers inside the paper cutter, completing the replacement of the old and new spacer paper. The paper cutter then resumes normal paper feeding operation.

[0041] The spacer paper connection method in this embodiment has simple operation steps and a clear process. It does not require complicated operating skills and operators can complete it independently after simple training. It simplifies the traditional 2-3 person cooperation mode of paper changing operation to a single person operation mode, which greatly reduces labor costs. At the same time, the entire operation process takes only 5-8 minutes, compared with 15-20 minutes of the traditional tape connection method, which improves the work efficiency by more than double. It effectively reduces the downtime of the production line and improves the overall production efficiency of electronic glass packaging.

[0042] Example 3: This embodiment, based on the spacer paper connection method described in Embodiment 2, precisely optimizes and limits the sewing parameters of the sewing machine. By rationally setting the sewing speed, stitch density, needle diameter, and thread specifications, it ensures the tensile strength of the seam while avoiding excessive damage to the spacer paper, and simultaneously meets the high cleanliness requirements of electronic glass production. The specific optimizations are as follows: During sewing operations, the sewing speed and stitch density are strictly controlled so that the sewing speed of the sewing machine 6 does not exceed 5cm / s. This speed setting ensures that the operator has sufficient time to control the direction of the sewing machine, ensuring straight stitches, and also avoids skipped stitches and thread breaks caused by excessive sewing speed, thus guaranteeing sewing quality. Simultaneously, the number of stitch holes per 1cm length on the sewn paper is limited to no less than 5, i.e., the stitch distance is no greater than 2mm. This high-density stitch distance significantly increases the contact area between the sewing thread and the paper, effectively improving the tensile strength of the seam and preventing the paper from tearing at the seam during the paper cutter's traction process. Furthermore, the high-density stitch distance is not excessively dense, preventing a decrease in the overall strength of the spacer paper due to too many stitch holes, achieving a balance between tensile strength and paper integrity.

[0043] The needle diameter of the sewing machine 6 is limited to 1-1.5mm. This diameter range is the optimal value after multiple tests: If the needle diameter is less than 1mm, the through-hole diameter of the needle is too small, making it difficult for the thread to pass through the needle hole. Furthermore, the thin needle has low structural strength and is prone to bending and breakage during sewing, affecting the normal operation of the sewing process. If the needle diameter is greater than 1.5mm, the thread hole left by the needle on the paper is too large. Since the spacer paper is thin and clean, an excessively large thread hole will damage the paper's fiber structure, causing the paper to easily tear at the thread hole, failing to meet the tension requirements of the paper cutter's traction process. A needle diameter of 1-1.5mm ensures that the thread passes smoothly through the needle hole for stable sewing while maintaining a reasonable thread hole size to avoid excessive damage to the paper.

[0044] The specifications and materials of the sewing thread are limited. Nylon or PE thread should be used for sewing, with a diameter of 0.5-1mm. Both nylon and PE threads have excellent physical properties, high tensile strength, and good toughness, capable of withstanding the continuous tension during the paper cutter's traction process without easily breaking. Simultaneously, the smooth surface of these materials meets the cleanroom standards for electronic glass production, preventing the shedding of lint, dust, and other impurities during sewing and subsequent paper feeding, thus avoiding contamination of the spacer paper and electronic glass substrate and ensuring the cleanliness of the electronic glass product. The thread diameter is set at 0.5-1mm. If the diameter is less than 0.5mm, the tensile strength of the thread is insufficient, making it prone to breakage during traction; if the diameter is greater than 1mm, the thread is too thick, causing the sewing hole to be excessively stretched during sewing, increasing sewing resistance and easily causing paper tearing.

[0045] This embodiment achieves excellent tensile strength at the seam between the old and new spacer paper by precisely optimizing the sewing parameters. This ensures that the spacer paper has both high tensile strength and can stably withstand the traction force of the paper cutter, while also maintaining its integrity and cleanliness. This fully meets the high requirements of electronic glass substrate packaging and effectively solves the technical contradiction between "insufficient tensile strength" and "paper damage and contamination" in traditional sewing processes.

[0046] Example 4: This embodiment improves upon the spacer paper connection method described in Embodiment 2 by altering the way the old and new spacer papers are stacked. By folding the ends of the paper, a four-layer paper stitching structure is formed, significantly increasing the tensile strength at the stitching and completely preventing the paper from tearing at the stitching during the paper cutter's traction process. The specific improvement steps are as follows: In step S3 of Example 2, before stacking the old and new spacer sheets, an additional folding operation is performed at the ends of the sheets: the operator uses a special folding tool to fold the end edge of the old spacer sheet 4 inward by 2-3 cm, forming a double-layered paper structure at the end of the old paper. During the folding process, the folded edge is kept straight and wrinkle-free. At the same time, the starting edge of the new spacer sheet 5 is folded inward by 2-3 cm in the same manner, also forming a double-layered paper structure. After completing the folding, the double-layered ends of the old and new spacer sheets are stacked together, forming a four-layered paper structure in the stacked area. Then, the four-layered paper structure is pulled out 5-10 cm from the clamping surface of the horizontal clamping board 3, and then the horizontal clamping board 3 is used to clamp and fix it. The subsequent sewing operation, the release of the clamping board, and other steps are completely consistent with Example 2.

[0047] The core improvement of this embodiment is changing the traditional two-layer paper stacking and sewing to a four-layer paper stacking and sewing, increasing the stress-bearing layer at the seam from two to four layers, thus significantly increasing the stress-bearing area. In actual production testing, the four-layer sewing structure of this embodiment can withstand a maximum tensile force approximately 2.5 times that of a directly stacked two-layer sewing structure, resulting in a qualitative improvement in tensile strength. Furthermore, the folded edge is a self-folding of the paper itself, without adding any additional foreign matter, thus not affecting the cleanliness of the spacer paper, nor changing the overall thickness of the spacer paper, allowing it to pass smoothly through the various rollers inside the paper cutter without the risk of jamming.

[0048] Meanwhile, the fold length at the end of the paper is set to 2-3cm. This length ensures the effective superposition of the four-layer structure and improves tensile strength, while preventing the overlapping area from becoming too thick due to excessive folding. This avoids problems such as skipped stitches and broken threads caused by excessive paper thickness during sewing, achieving a perfect combination of "improved tensile strength" and "easy sewing".

[0049] Example 5: This embodiment provides a spacer paper connection system adapted to an electronic glass substrate packaging production line. This system is an integrated glue-free paper changing system that enables rapid, stable, and glue-free connection of new and old spacer papers, completely solving the pollution problem of traditional tape connections. It also improves paper changing efficiency and reduces labor costs. Its core components include a paper cutter body, the paper cutter inlet device described in Embodiment 1, and a handheld sewing machine 6. All components work together to form a complete paper changing operation system. The specific structure and working principle are as follows: Paper cutter body: The core paper feeding equipment of the electronic glass packaging production line. It is equipped with core components such as traction rollers and cutting mechanism to realize the feeding and fixed length cutting of spacer paper, providing continuous and uniform spacer paper for the packaging of electronic glass substrates. The operation area at its entrance is the core operation position for replacing old and new spacer paper, and it is precisely connected to the paper cutter entrance device.

[0050] Paper cutter inlet device: As the core positioning and clamping component of the system, it is fixedly installed at the inlet end of the paper cutter body. It includes a vertical clamping plate 2 and a horizontal clamping plate 3. Its structure and function are completely consistent with those of Embodiment 1. It realizes the vertical clamping of the old spacer paper and the horizontal clamping of the new and old spacer papers after they are stacked. At the same time, it provides a straight guide surface for the sewing machine to ensure the stable operation of the sewing operation.

[0051] Handheld bag sewing machine 6: As the core sewing component of the system, this portable operating device includes a sewing needle 61, a drive motor, a battery, a hand handle, and a switch button. It is small in size and lightweight, making it easy for operators to hold and operate, and suitable for the narrow operating space of the paper cutter's entrance. The sewing parameters of the bag sewing machine 6 are consistent with the optimized parameters of Example 3, with a needle diameter of 1-1.5mm, compatible with nylon or PE thread of 0.5-1mm diameter. The sewing speed is adjustable and can be stably controlled within 5cm / s, ensuring sewing quality and efficiency.

[0052] The workflow of the spacer paper connection system in this embodiment is fully compatible with the spacer paper connection methods in Embodiments 2, 3, and 4. Operators can choose between the basic two-layer sewing process or the optimized four-layer sewing process according to actual production needs, offering high operational flexibility. When using this system to replace old and new spacer paper, the entire process can be completed independently by only one operator, without the assistance of other personnel. This completely solves the problem of requiring 2-3 people to pull the paper and stick the tape in traditional tape connection methods, significantly reducing labor costs. Furthermore, actual production testing shows that the entire process, from cutting and clamping the old paper to overlapping and sewing the old and new paper, and then releasing the clamping paper and starting the paper cutter, takes only 5-8 minutes, compared to 15-20 minutes for traditional tape connection methods. This represents an efficiency improvement of over 60%, effectively reducing production line downtime and improving the overall production efficiency of the electronic glass packaging production line.

[0053] Furthermore, this system is a glue-free operation system, requiring no tape throughout the entire process. It completely solves the technical problem of adhesive overflow contaminating the paper cutter rollers and spacers in traditional tape connection methods. This avoids defects such as white spots and adhesion on electronic glass substrates caused by adhesive contamination, effectively improving the yield rate of electronic glass products and reducing product scrap rates, bringing significant economic benefits to electronic glass manufacturers. At the same time, the system has low equipment modification costs, is simple to operate, and easy to maintain. It can be directly adapted to the existing paper cutter equipment in electronic glass packaging production lines, possessing strong practicality, versatility, and market promotion value.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for connecting spacer paper rolls, used on a paper cutter for replacing spacer paper rolls for electronic glass packaging, characterized in that, Includes the following steps: S1: Provides a paper cutter inlet, which is equipped with a vertical clamping plate (2) and a horizontal clamping plate (3); S2: Before the old spacer paper (4) roll is used up, cut it and clamp the end of the old paper with the vertical clamping board (2); S3: Overlap the starting end of the new spacer paper (5) roll with the end of the old paper, and pull them together from the horizontal clamping board (3) for a distance, and then use the horizontal clamping board (3) to clamp and fix the overlapping part. S4: Using a sewing machine (6), proceed along the edge of the horizontal cardboard (3) to sew the overlapping old and new spacer sheets (4) together; S5: Loosen the vertical clamping paper (2) and the horizontal clamping paper (3) to complete the connection of the old and new spacer paper (4).

2. The spacer paper connection method according to claim 1, characterized in that, In step S4, the sewing speed of the sewing machine (6) is controlled to not exceed 5cm / s, and the number of thread holes in each 1cm length of the sewn paper is not less than 5.

3. The spacer paper connection method according to claim 1 or 2, characterized in that, The sewing machine (6) uses a needle with a diameter of 1-1.5mm, and the sewing thread is nylon or PE thread with a diameter of 0.5-1mm.

4. The spacer paper connection method according to claim 1, characterized in that, In step S3, before stacking the new and old spacer paper (4), the end edges of the new and old spacer paper (4) are folded inwards respectively, and then the folded double ends are stacked together to form a four-layer paper structure before clamping and sewing.

5. A paper cutter inlet device for implementing the method of claim 1, characterized in that, include: A vertical clamping cardboard (2) is set at the entrance of the paper cutter to clamp the end of the old spacer paper (4); A horizontal clamping plate (3) is placed below the vertical clamping plate (2) to clamp and fix the stacked new and old spacer paper (4), and the horizontal clamping plate (3) has a straight edge, which serves as a guide surface for the sewing machine (6) during sewing.

6. The paper cutter inlet device according to claim 5, characterized in that, The horizontal clamping plate (3) is fixedly or movably connected to the vertical clamping plate (2), and the clamping surface of the horizontal clamping plate (3) is perpendicular to the clamping surface of the vertical clamping plate (2).

7. The paper cutter inlet device according to claim 5 or 6, characterized in that, The vertical clamping plate (2) and / or the horizontal clamping plate (3) are clamped and released by a manual drive mechanism or an automatic drive mechanism.

8. The paper cutter inlet device according to claim 5, characterized in that, The width of the horizontal clamping paperboard (3) is not less than the width of the spacer paper, so as to ensure that the paper in the overlapping part is clamped evenly in the width direction.

9. A spacer paper connection system, comprising a paper cutter body, characterized in that, The paper cutter body is provided with a paper cutter inlet device as described in any one of claims 5 to 8 at its inlet.

10. The spacer paper connecting system according to claim 9, characterized in that, It also includes a handheld sewing machine (6) for sewing together the overlapping old and new spacer sheets (4) along the edge of the horizontal clipboard (3).

Images