Self-adhesive bandage processing device and processing method thereof

Abstract

This invention relates to the field of self-adhesive bandage technology and provides a self-adhesive bandage processing apparatus, including an adhesive cover placed on the bottom of a coating roller. The adhesive cover includes a cover body with an arc-shaped groove and multiple adhesive roller structures, which are arranged in an array along the arc-shaped groove of the cover body. Each adhesive roller structure includes an adhesive roller, adhesive cotton, and two sealing members. The sealing members are pushed upwards from the end of the adhesive roller to seal it, and are used to adjust the adhesive width of the adhesive roller to adapt to the coating of self-adhesive bandages of different sizes. A processing method for the self-adhesive bandage processing apparatus includes preparation, sequential progressive adhesive application of multiple rollers, dynamic width and mode adjustment, and coating and continuous operation.

Description

Technical Field

[0001] This invention relates to the field of self-adhesive bandage technology, and more particularly to a self-adhesive bandage processing apparatus and processing method. Background Technology

[0002] Self-adhesive bandages, also known as self-adhesive elastic bandages, are medical dressing fixation and limb compression bandage materials with self-adhesive properties. Their core feature is that the bandage itself is adhesive, eliminating the need for external fixation devices such as tape, pins, or fasteners. They adhere layer by layer solely through the adhesive forces between the materials themselves, without sticking to the skin or hair. Due to their ease of use, reliable fixation, breathability, comfort, and reusability, these products are widely used in surgical wound dressing fixation, sports protection, limb swelling compression, and pet care, among other applications.

[0003] Currently, commercially available self-adhesive bandages can be mainly divided into two categories based on their self-adhesive principle: one is the chemical adhesive type, which achieves self-adhesion by coating a layer of pressure-sensitive adhesive (such as acrylic adhesive or rubber-based adhesive) onto the surface of an elastic substrate (such as non-woven fabric or knitted fabric); the other is the physical interlocking type, which achieves self-adhesion by forming microscopic hook-like or loop-like structures on the fiber surface through special weaving or finishing processes. Among these, the chemical adhesive type dominates due to its mature technology and controllable cost. Its typical processing method usually includes continuous processes such as substrate unwinding, adhesive coating, drying and curing, cooling, slitting, and final winding. In this process, the coating process is the core link that determines the uniformity of product adhesion, consistency of weight, and user comfort. Existing self-adhesive bandage processing equipment generally uses coating rollers, doctor blades, or spraying systems to apply adhesive to the substrate surface.

[0004] Although existing coating equipment has achieved mass production, significant technical bottlenecks remain when pursuing higher coating accuracy and adapting to flexible production needs. Specifically, when dealing with substrates of various widths or specific coating patterns, the adjustment flexibility and coating uniformity of existing equipment face challenges. For example, a common adjustment method is to match the substrate width by adding, removing, or adjusting the opening, closing, and position of multiple independent nozzles. However, this method has inherent drawbacks: the spray range of each nozzle is limited, and multiple nozzles need to be closely arranged to cover the entire width. If the nozzle spacing is not set properly, the flow fields of adjacent spraying areas can easily intersect or leave uncovered gaps. In addition, vibrations generated by the operation of the production line machinery, disturbances in the ambient airflow (wind speed), and slight changes in the rheological properties of the adhesive itself can further exacerbate the instability of the coating trajectory, ultimately resulting in fluctuations in the coating amount along the width of the substrate, producing defects such as streaks, thick edges, thin centers, or dotted unevenness, which seriously affect the bonding consistency and appearance quality of the finished bandages. Even in some improved designs, such as the solution disclosed in patent application number 202222933669.9 entitled "A Double-Sided Coating Structure for Self-Adhesive Bandages," the essence still relies on the combination and alignment of multiple coating units or nozzles. This fails to fundamentally solve the coating uniformity problem caused by boundary effects, mechanical vibration, and environmental interference when multiple independent spray sources operate collaboratively. This problem is particularly prominent under high-speed, wide-width, or frequently changing product specification production conditions. Therefore, there is an urgent need for a self-adhesive bandage processing device and method with higher coating uniformity, more flexible adjustment, and stronger anti-interference capabilities to improve product quality and production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a self-adhesive bandage processing device and method, aiming to solve the problem that existing coating rollers, when facing coating operations on substrates of various sizes, mostly adjust the number and position of the nozzles. However, due to the limited spray range of the nozzles, if the distance between the nozzles is not well controlled, the spray coverage will overlap. In addition, the vibration of mechanical operation and the wind speed in the construction environment will cause uneven coating, resulting in uneven coating and poor coating quality.

[0006] Specifically: a self-adhesive bandage processing apparatus, including an adhesive cover disposed on the bottom of a coating roller, the adhesive cover comprising: A cover with an arc-shaped groove; Multiple gluing roller structures are used to apply glue to the coating roller in increments; the multiple gluing roller structures are distributed in an array along the arc-shaped groove of the cover; The structure of the gluing roller includes: The glue roller is powered by a drive motor. A cylindrical adhesive cotton is laid on the surface of the adhesive roller; the adhesive roller provides adhesive to the adhesive cotton; the adhesive cotton abuts against the coating roller; Two sealing components are distributed at both ends of the glue-applying roller; the sealing components are pushed upward from the end of the glue-applying roller to seal, and are used to adjust the glue-applying width of the glue-applying roller to adapt to the coating of self-adhesive bandages of different sizes. When the gluing roller is a coating roller, the drive motor is started, causing the gluing roller and the coating roller to rotate in opposite directions. The glue inside the gluing roller first enters the gluing cotton and is then spread onto the coating roller through the gluing cotton, ensuring the uniformity of the glue on the coating roller surface. The sealing component is then activated to push the gluing roller from the end of the gluing roller to the coating roller for sealing. The gluing roller is adjusted to the gluing width of the coating roller, allowing the coating roller to adapt to the coating of self-adhesive bandages of different sizes. This eliminates the problem of uneven glue application caused by overlapping spray coverage areas or vibrations from mechanical operation and disturbances from ambient airflow.

[0007] A further embodiment: the adhesive roller includes: The glue roller body has an internal cavity; Multiple glue-applying holes are formed on the glue-applying roller body; the multiple glue-applying holes are distributed in an array on the glue-applying roller body; The positioning tube is fixed to one end of the upper glue roller body and is distributed in a straight line; the column center line of the positioning tube and the column center line of the upper glue roller body are on the same straight line; the positioning tube and the cavity are connected.

[0008] A further embodiment: the adhesive roller further includes: The drive shaft is fixed at the other end of the glue roller body and is arranged in a straight line; the column center line of the drive shaft and the column center line of the glue roller body are on the same straight line. Support base one is used to support the drive shaft; the drive shaft rotatably passes through the support base one and is rotatably assembled on the output shaft of the drive motor through a coupling. A second support seat with an internal glue-applying cavity is rotatably mounted on the end of a positioning tube; the glue-applying cavity of the second support seat is connected to the positioning tube through the end opening of the positioning tube. Connecting tube, used to supply glue to the glue application cavity.

[0009] A further embodiment: the sealing element includes: guide; A sealing cylinder is assembled on the guide rail.

[0010] A further embodiment: The guide rail includes: Guide rail body, used for sealing cylinder assembly; The support plate is fixed to the guide rail body; One end of the electric telescopic pole is fixed to the support plate; An upright plate is fixed to the other end of an electric telescopic rod; the upright plate and the guide rail are vertically distributed.

[0011] A further embodiment: the sealing cylinder includes multiple sealing rings, which are arranged in a straight line; the multiple sealing rings are independent of each other; the sealing rings are used to squeeze and fit around the outer side of the glued cotton and the glued roller.

[0012] A further embodiment: the sealing ring comprises: A slider that is slidably mounted on the guide rail body; The connecting plate is fixed to the slider; The second electric telescopic rod has one end fixed to the connecting plate; the other end of the second electric telescopic rod is fixed to the connecting plate of another adjacent sealing ring.

[0013] A further solution: the guide rail body is made of magnetic metal material; an electromagnetic coil is laid on the slider, and the slider's magnetism is determined by switching the electromagnetic coil on and off; when the slider is energized, it becomes magnetic, and the slider can be magnetically attracted and limited to the guide rail body.

[0014] A further embodiment: the sealing ring further includes: The outer positioning ring is fixed at the end of the connecting plate; An inner sealing ring is inserted inside the outer positioning ring; the columnar centerline of the inner sealing ring and the columnar centerline of the outer positioning ring are on the same straight line.

[0015] A further solution: A sealing rubber ring is provided on each side of the inner sealing ring.

[0016] Another object of the present invention is to provide a processing method for the above-described self-adhesive bandage processing device, comprising the following steps: Step 1, Preparation Step 2: Apply adhesive gradually using multiple rollers. Step 3: Dynamic Width and Mode Adjustment Step 4: Coating and Continuous Operation.

[0017] Compared with the prior art, the present invention can achieve the following: 1. During the coating process of self-adhesive bandage, the adhesive cover applies adhesive to the coating roller in stages through multiple adhesive roller structures distributed along the arc-shaped grooves of the cover. This relay adhesive application method avoids the problems of uneven flow and accumulation caused by excessive adhesive volume when applying adhesive at a single point or simultaneously in traditional methods. It allows the adhesive to undergo a gradual and cumulative spreading process on the surface of the coating roller, thereby ensuring the uniformity of the adhesive layer on the surface of the coating roller at the microscopic level and the stability at the macroscopic level from the source. 2. When the gluing roller structure is a coating roller for gluing, the drive motor is started. The drive motor drives the gluing roller and the coating roller to rotate in opposite directions. The glue inside the gluing roller first enters the gluing cotton and is then spread onto the coating roller through the gluing cotton, ensuring the uniformity of the glue on the coating roller surface. At the same time, the sealing component is activated to push the gluing roller from the end of the gluing roller to the coating roller for sealing. The gluing width of the gluing roller is adjusted to adapt to the coating of self-adhesive bandages of different sizes. This eliminates the problem of uneven glue application caused by overlapping spray coverage areas or vibrations from mechanical operation and disturbances from ambient airflow. 3. During the sealing process, the electric telescopic rod 1 extends and retracts, driving the guide rail and sealing cylinder along the columnar direction of the glue-applying roller. Simultaneously, the electric telescopic rod 2 is activated. This telescopic rod 2 adjusts the separation and distance of multiple sealing rings, allowing the sealing component to pass through multiple or more sealing rings at one point, achieving multi-point sealing of the glue-applying roller. This facilitates multi-point glue application to the coating roller, enabling it to adapt to different types of self-adhesive bandages. Specifically, the sealing cylinder is designed with multiple separable sealing rings controlled by the independent electric telescopic rod 2. Through control, these sealing rings can be combined into one or more sealing units, achieving multi-point sealing at different axial positions. This means that the glue application width can not only be continuously adjusted but also applied in discontinuous multi-segment areas, thus adapting to self-adhesive bandage products with special structural requirements such as perforations and segmented glue application. IV. In traditional multi-nozzle coating methods, each jet stream is independent and has distinct boundaries, making it highly susceptible to beam disturbances caused by mechanical vibration or ambient airflow, resulting in striped fluctuations in coating amount. In this invention, the sequential application of multiple coating rollers first transfers the adhesive to the coating roller in a highly uniform thin layer multiple times, forming an inherent multi-level buffering and homogenization mechanism. At the same time, a physical sealing ring that can move axially and be positioned at multiple points forms a defined, airflow-free, closed coating area on the surface of the coating roller. The combination of these two features ensures that the entire process of adhesive supply and transfer is conducted in a controlled and isolated mechanical environment, fundamentally eliminating the possibility of uneven coating caused by jet cross-spraying, vibration, and airflow disturbance, achieving an extremely stable coating quality that is difficult to achieve with previous technical solutions. V. Width adjustment and patterned coating are usually two different equipment functions; this invention cleverly integrates the two into the same sealing actuator, i.e., the sealing component, through a separable sealing ring design; the electric telescopic rod one enables continuous stepless width adjustment to adapt to standard-sized bandages; while the multiple sealing rings controlled by the electric telescopic rod two enable discrete multi-point sealing, thereby creating multiple independent adhesive tapes on the same coating roller; without changing any hardware, the same equipment can quickly switch between multiple modes such as continuous coating and segmented coating, not only adapting to coating substrates of different sizes, but also directly producing functional bandage products with specific adhesive areas (such as adhesive at both ends and non-adhesive in the middle), greatly expanding the processing range and product innovation capabilities of the equipment, which is something that cannot be achieved by traditional methods of increasing or decreasing the number of nozzles or changing molds; 6. Using a sizing pad as an intermediate medium, the adhesive is transferred by wetting and applied to the coating roller in an elastic contact manner. Compared with direct spraying or steel roller transfer, this method can more effectively eliminate air bubbles and make the adhesive adhere more gently and evenly. Combined with the aforementioned progressive coating, it significantly reduces losses caused by adhesive splashing and drying skinning, while making the formed adhesive layer denser and defect-free. This effect is particularly prominent in high-speed production or when using high-solids-content, fast-drying adhesives, reducing production costs while ensuring quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the self-adhesive bandage processing device in one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the adhesive cover in one embodiment of the present invention; Figure 3 for Figure 2 The coating cover in the image is a demonstration of coating roller application; Figure 4 This is a schematic diagram of the adhesive roller structure in one embodiment of the present invention; Figure 5 for Figure 4 Exploded view of the upper and middle rubber roller structure; Figure 6 This is a schematic diagram of the structure of the sealing element in one embodiment of the present invention; Figure 7 This is a schematic diagram of the guide rail structure in one embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the sealing cylinder in one embodiment of the present invention; Figure 9 This is a schematic diagram of the sealing ring structure in one embodiment of the present invention; Figure 10 This is a schematic diagram of the assembly structure of the adhesive cotton and the adhesive roller in one embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of the gluing roller in one embodiment of the present invention.

[0019] In the diagram: 100, glue tank; 200, coating roller; 300, conveyor roller; 400, equipment housing; 500, glue cover; 600, cover body; 700, glue roller structure; 800, self-adhesive bandage; 710, sealing component; 711, guide rail; 712, sealing cylinder; 713, sealing ring; 720, glue cotton; 730, glue roller; 731, support seat one; 732, drive shaft; 733, glue roller body; 734, glue hole; 735, positioning tube; 736, support seat two; 737, connecting tube; 7111, guide rail body; 7112, support plate; 7113, electric telescopic rod one; 7114, upright plate; 7131, electric telescopic rod two; 7132, slider; 7133, connecting plate; 7134, outer positioning ring; 7135, inner sealing ring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0022] In the embodiments of this invention, please refer to Figures 1-3 The self-adhesive bandage processing apparatus includes an adhesive cover 500 covering the bottom of the coating roller 200, the adhesive cover 500 comprising: A cover 600 with an arc-shaped groove; Multiple gluing roller structures 700 are used to apply glue to the coating roller 200 in installments; the multiple gluing roller structures 700 are distributed in an array along the arc-shaped groove of the cover 600; Therefore, during the coating process of the coating roller 200 coating the self-adhesive bandage 800, the adhesive cover 500 applies adhesive to the coating roller 200 in stages through multiple adhesive roller structures 700 distributed along the arc-shaped groove array of the cover body 600. This relay adhesive application method avoids the problem of uneven flow and accumulation caused by excessive amount of adhesive when applying adhesive at a single point or simultaneously in traditional methods. It allows the adhesive to undergo a gradual and cumulative spreading process on the surface of the coating roller, thereby ensuring the microscopic uniformity and macroscopic stability of the adhesive layer on the surface of the coating roller 200 from the source. It should be further noted that the device also includes an equipment housing 400, on the side of which a glue tank 100 is installed. The glue tank 100 is used to provide glue to multiple gluing roller structures 700. Multiple conveyor rollers 300 are installed on the equipment housing 400. The multiple conveyor rollers 300 are staggered and convey self-adhesive bandage 800 to the coating roller 200. The coating roller 200 is rotatably mounted on the equipment housing 400. The reason why "glue tank 100, coating roller 200, conveying roller 300 and equipment housing 400" are not described in detail is that they are all existing technologies and can be purchased directly on the market or assembled by purchasing parts, etc. Whether they are publicly available or not does not affect the glue cover 500 that is to be protected, so they will not be elaborated on here. Continue reading Figure 4 , Figure 5 and Figure 10 The gluing roller structure 700 includes: The 730 gluing roller is powered by a drive motor. A cylindrical adhesive cotton 720 is fitted and laid on the surface of the adhesive roller 730; the adhesive roller 730 provides adhesive to the adhesive cotton 720; the adhesive cotton 720 abuts against the coating roller 200; Two sealing elements 710 are distributed at both ends of the glue-applying roller 730; the sealing elements 710 are pushed from the end of the glue-applying roller 730 to seal the glue-applying roller 730 (Note: this direction is the column direction of the glue-applying roller 730), and are used to adjust the glue-applying width of the glue-applying roller 730 to adapt to the coating of self-adhesive bandages 800 of different sizes. Therefore, when the gluing roller structure 700 applies glue to the coating roller 200, the drive motor is started, causing the gluing roller 730 and the coating roller 200 to rotate in opposite directions. The glue inside the gluing roller 730 first enters the gluing cotton 720 and is then spread onto the coating roller 200 through the gluing cotton 720, ensuring the uniformity of the glue on the surface of the coating roller 200. Simultaneously, the sealing component 710 is activated to push the gluing roller 730 from the end of the gluing roller 730 to seal it, adjusting the gluing width of the gluing roller 730 onto the coating roller 200, enabling the coating roller 200 to adapt to coating self-adhesive bandages 800 of different sizes. This eliminates the possibility of overlapping spray coverage areas or uneven glue application caused by mechanical vibrations and environmental airflow disturbances.

[0023] In the embodiments of this invention, please refer to Figure 5 , Figure 10 and Figure 11 The adhesive roller 730 includes: The glue roller body 733 has an internal cavity; Multiple glue application holes 734 are formed on the glue application roller body 733; the multiple glue application holes 734 are distributed in an array on the glue application roller body 733. The positioning tube 735 is fixed to one end of the upper glue roller body 733 and is distributed in a straight line; the column center line of the positioning tube 735 and the column center line of the upper glue roller body 733 are on the same straight line; the positioning tube 735 is connected to the cavity.

[0024] Please see Figure 11 The gluing roller 730 further includes: The drive shaft 732 is fixed to the other end of the glue roller body 733 and is distributed in a straight line; the column center line of the drive shaft 732 and the column center line of the glue roller body 733 are on the same straight line. Support base 731 is used to support drive shaft 732; drive shaft 732 rotatably passes through support base 731 and is rotatably mounted on the output shaft of drive motor via coupling. The reason why "drive motor and drive motor power wiring method" are not described in detail is that they are both existing technologies and can be purchased directly on the market or assembled by purchasing parts, etc. Whether they are disclosed or not does not affect the protective cover 500, so they will not be elaborated here. A second support seat 736 with an internal glue-applying cavity is rotatably mounted on the end of a positioning tube 735; the glue-applying cavity of the second support seat 736 is connected to the positioning tube 735 through the end opening of the positioning tube 735. The connecting pipe 737 is used to supply glue to the glue application chamber; the connecting pipe 737 is connected to the glue tank 100 via a connecting hose.

[0025] Therefore, the glue inside the glue tank 100 enters the connecting pipe 737 and the glue application chamber through the connecting hose, and then enters the cavity inside the glue application roller body 733 through the positioning pipe 735. The glue in the cavity is immersed into the glue application cotton 720 through multiple glue application holes 734. The drive motor is started, and the drive motor drives the glue application roller body 733 to rotate through the drive shaft 732. Finally, the glue is applied to the coating roller 200 through the glue application cotton 720.

[0026] In the embodiments of this invention, please refer to Figures 4-6 The sealing element 710 includes: Guide rail 711 (guide rail 711 is fixedly mounted on support base 1 731 or support base 2 736); The sealing cylinder 712 is assembled on the guide rail 711.

[0027] Please see Figure 6 and Figure 7 The guide rail 711 includes: Guide rail body 7111, used for assembling sealing cylinder 712; Support plate 7112 is fixed on the guide rail body 7111; An electric telescopic rod 7113 has one end fixed to the support plate 7112; The upright plate 7114 is fixed at the other end of the electric telescopic rod 7113; the upright plate 7114 and the guide rail body 7111 are vertically distributed (the upright plate 7114 is fixedly assembled on the support base 731 or the support base 736).

[0028] Therefore, the electric telescopic rod 7113 on the guide rail 711 is activated. The electric telescopic rod 7113 drives the guide rail body 7111 and the sealing cylinder 712 to push the glue roller 730 from the end of the glue roller 730 to the glue roller 730 for sealing by telescopic movement. The glue roller 730 is adjusted to the glue application width of the coating roller 200, so that the coating roller 200 can adapt to the coating of self-adhesive bandages 800 of different sizes.

[0029] In the embodiments of this invention, please refer to Figure 6 , Figure 8 and Figure 9 The sealing cylinder 712 includes multiple sealing rings 713, which are arranged in a straight line. The multiple sealing rings 713 are independent of each other. The sealing rings 713 are used to squeeze and fit around the glued cotton 720 and the glued roller 730.

[0030] Please see Figure 8 and Figure 9 The sealing ring 713 includes: Slider 7132 is slidably mounted on guide rail body 7111; The connecting plate 7133 is fixed on the slider 7132; One end of the electric telescopic rod 7131 is fixed to the connecting plate 7133; the other end of the electric telescopic rod 7131 is fixed to the connecting plate 7133 of the adjacent sealing ring 713.

[0031] Please see Figure 9 The guide rail body 7111 is made of magnetic metal material; an electromagnetic coil is laid on the slider 7132, and the presence or absence of magnetism of the slider 7132 can be determined by switching the electromagnetic coil on and off; when the slider 7132 is energized, it becomes magnetic and can be magnetically attracted and limited on the guide rail body 7111.

[0032] Please see Figure 9 The sealing ring 713 further includes: The outer positioning ring 7134 is fixed at the end of the connecting plate 7133; The inner sealing ring 7135 is inserted inside the outer positioning ring 7134; the column center line of the inner sealing ring 7135 and the column center line of the outer positioning ring 7134 are on the same straight line.

[0033] Please see Figure 9 A sealing rubber ring is provided on each side of the inner sealing ring 7135.

[0034] Therefore, the electric telescopic rod 7113, through its extension and retraction, drives the guide rail 7111 and the sealing cylinder 712 along the columnar direction of the upper glue roller 730, pushing it from the end of the upper glue roller 730 to the upper glue roller 730 for sealing. During this process, the electric telescopic rod 7131 is activated. The electric telescopic rod 7131, through its extension and retraction, determines whether the multiple sealing rings 713 separate and the distance between them, enabling the sealing element 710 to achieve multi-point sealing of the upper glue roller 730 through one or more sealing rings 713. This is beneficial for sealing more than 200 points of the coating roller. The coating roller 200 is designed to adapt to different types of self-adhesive bandages 800. The sealing cylinder 712 is designed with multiple separable sealing rings 713 controlled by an independent electric telescopic rod 7131. Through control, these sealing rings 713 can be combined into one or more sealing units to achieve multi-point sealing at different axial positions. This means that the coating width can not only be continuously adjusted, but also coated in non-continuous multi-segment areas, thus adapting to self-adhesive bandage products with special structural requirements such as hollowing and segmented coating.

[0035] In this embodiment of the invention, the core of the self-adhesive bandage processing device lies in an innovative step-by-step, adjustable-width, multi-point sealing adhesive application system. Through the synergy of a unique mechanical structure and control logic, this system fundamentally optimizes the uniformity, stability, and adaptability of the adhesive supplied to the coating roller.

[0036] Specifically, the self-adhesive bandage processing device has an arc-shaped adhesive cover 500 above the coating roller 200. Multiple independent adhesive roller structures 700 are distributed in an array within the arc-shaped groove of the cover 600. During operation, the adhesive in the adhesive tank 100 is pumped into the interior of each adhesive roller structure 700 through the connecting hose and connecting pipe 737. The adhesive first enters the adhesive cavity, and then is transported to the inner cavity of the adhesive roller body 733 through the positioning pipe 735. Finally, it seeps out through the dense adhesive holes 734 on the surface of the roller body and evenly soaks the adhesive cotton 720 wrapped around the outer layer of the roller body. The key workflow is as follows: The drive motor starts, causing the gluing roller 733 to rotate in the opposite direction to the coating roller 200 below. At this time, the multiple gluing roller structures 700 do not operate simultaneously, but instead apply the glue saturated on their gluing cotton 720 to the surface of the rotating coating roller in sequence and in small amounts. This relay gluing method avoids the problem of uneven flow and accumulation caused by excessive glue volume when applying glue at a single point or simultaneously in traditional methods. It allows the glue to undergo a gradual and cumulative spreading process on the surface of the coating roller, thereby ensuring the microscopic uniformity and macroscopic stability of the glue layer on the surface of the coating roller from the source. To achieve flexible production of self-adhesive bandages 800 of varying widths, the device integrates a sealing component 710. The core of the sealing component 710 is an electric telescopic rod 7113 mounted on a guide rail 711. Its extension and retraction can move the entire sealing cylinder 712 axially along the gluing roller 730, thereby physically covering part of the gluing area from the end, precisely matching the width of the substrate to be coated. Furthermore, the sealing cylinder 712 is internally designed with multiple separable sealing rings 713 controlled by an independent electric telescopic rod 7131. Through control, these sealing rings 713 can be combined into one or more sealing units, achieving multi-point sealing at different axial positions. This means that the gluing width can not only be continuously adjusted but also gluing can be performed in discontinuous multi-segment areas, thus adapting to self-adhesive bandage products with special structural requirements such as perforations and segmented gluing.

[0037] In traditional multi-nozzle coating methods, each jet stream is independent and has distinct boundaries, making it highly susceptible to beam disturbances caused by mechanical vibration or ambient airflow, resulting in striped fluctuations in coating amount. In this invention, the sequential application of multiple coating roller structures 700 first transfers the adhesive to the coating roller in a highly uniform thin layer multiple times, forming an inherent multi-level buffering and homogenization mechanism. At the same time, the axially movable and multi-point positioning physical sealing ring 713 forms a defined, airflow-free, closed coating area on the surface of the coating roller 730. The combination of these two features ensures that the entire process of adhesive supply and transfer is conducted in a controlled and isolated mechanical environment, fundamentally eliminating the possibility of uneven coating caused by jet cross-spraying, vibration, and airflow disturbance, achieving an extremely stable coating quality that is difficult to achieve with previous technical solutions.

[0038] Width adjustment and patterned coating are usually two different equipment functions. This invention cleverly integrates the two into the same sealing actuator, namely the sealing element 710, through the design of a separable sealing ring 713. The electric telescopic rod 7113 enables continuous stepless width adjustment to adapt to standard-sized bandages. The multiple sealing rings 713 controlled by the electric telescopic rod 7131 can achieve discrete multi-point sealing, thereby creating multiple independent adhesive tapes on the same coating roller 200. Without changing any hardware, the same equipment can quickly switch between multiple modes such as continuous coating and segmented coating. It can not only adapt to coating substrates of different sizes, but also directly produce functional bandage products with specific adhesive areas (such as adhesive at both ends and non-adhesive in the middle), which greatly expands the processing range and product innovation capabilities of the equipment. This is something that cannot be achieved by traditional methods of increasing or decreasing the number of nozzles or changing molds.

[0039] Using Glue 720 as an intermediate medium, the adhesive is transferred by wetting and applied to the coating roller in an elastic contact manner. Compared with direct spraying or steel roller transfer, this method can more effectively eliminate air bubbles and make the adhesive adhere more gently and evenly. Combined with the aforementioned progressive coating, it significantly reduces losses caused by adhesive splashing and drying skinning, while making the formed adhesive layer denser and defect-free. This effect is particularly prominent in high-speed production or when using high-solids-content, fast-drying adhesives, reducing production costs while ensuring quality.

[0040] In this embodiment of the invention, a processing method for the self-adhesive bandage processing device described above is provided, comprising the following steps: Step 1, Preparation S1. Substrate and equipment in place: Align the unwinding path of the self-adhesive bandage substrate 800 to prepare it for entry into the coating roller 200 area; ensure that the adhesive cover 500 and its internal multiple adhesive roller structures 700 are installed in place. S2. Start the glue supply system: Start the glue supply system of glue tank 100 so that glue is pre-delivered and filled into the internal cavity of glue roller body 733 through connecting hose, connecting pipe 737 and positioning pipe 735. S3. Preset sealing width: Based on the target width of the self-adhesive bandage to be produced, activate the electric telescopic rod 7113 on the sealing component 710; the electric telescopic rod 7113 pushes the guide rail body 7111 and the sealing cylinder 712 to move along the axial direction of the glue roller 730, and performs physical sealing from the roller end to accurately match the coating width. Step 2: Apply adhesive gradually using multiple rollers. S1. Start rotation and impregnation: Simultaneously start the drive motors of the coating roller 200 and each glue roller structure 700; the drive motor drives the glue roller body 733 to rotate in the opposite direction to the coating roller 200 through the drive shaft 732; at the same time, glue continuously seeps out from the inner cavity of the roller body through the glue hole 734 and impregnates the glue cotton 720 wrapped on the outer layer of the roller body. S2. Perform incremental glue application: Multiple glue application roller structures 700 distributed in an array sequentially contact the surface of the coating roller 200; each glue application roller transfers a uniform and quantitative amount of glue to the surface of the coating roller through its moist glue application cotton 720. Through multiple stacking and flattening, an extremely uniform and stable glue layer is formed on the surface of the coating roller. Step 3: Dynamic Width and Mode Adjustment S1. Continuous width adjustment: If it is necessary to switch between different widths of self-adhesive bandages 800 during production, the electric telescopic rod 7113 can be dynamically adjusted again to drive the sealing cylinder 712 to move to a new position for stepless continuous adjustment of the coating width. S2. Complex Pattern Sealing: When special types of bandages such as segmented gluing are required to be produced, the electric telescopic rod 7131 can be activated; by controlling its extension and retraction, multiple sealing rings 713 in the sealing cylinder 712 can be separated or combined to form one or more independent sealing points in the axial direction of the gluing roller; multiple discontinuous gluing areas can be created on the same roller to adapt to complex coating pattern requirements. Step 4, Coating and Continuous Operation S1. Final coating completed: The coating roller 200, which has been evenly coated with adhesive, transfers the adhesive on its surface precisely and evenly to the self-adhesive bandage 800 substrate passing below it during rotation, thus completing the coating operation. S2. Closed-loop control and continuous production: During operation, glue is continuously supplied, and each glue roller 730 continuously applies glue gradually. At the same time, the coating mode can be adjusted at any time through the sealing part 710 according to the production instructions.

[0041] In the description of this invention, unless otherwise stated, "a plurality of" means two or more. It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A self-adhesive bandage processing apparatus, comprising an adhesive cover (500) disposed on the bottom of a coating roller (200), characterized in that, The adhesive cover (500) includes: A cover (600) with an arc-shaped groove. Multiple gluing roller structures (700) are used to apply glue to the coating roller (200) in installments; the multiple gluing roller structures (700) are distributed along the arcuate grooves of the cover (600); The adhesive roller structure (700) includes: The gluing roller (730) is powered by a drive motor. A cylindrical adhesive cotton (720) is sleeved and laid on the surface of the adhesive roller (730); the adhesive roller (730) provides adhesive to the adhesive cotton (720); the adhesive cotton (720) abuts against the coating roller (200); Two sealing elements (710) are distributed at both ends of the glue roller (730); the sealing elements (710) are pushed from the end of the glue roller (730) to the glue roller (730) to seal, and are used to adjust the glue application width of the glue roller (730) to adapt to the coating of self-adhesive bandages (800) of different sizes.

2. The self-adhesive bandage processing device according to claim 1, characterized in that, The adhesive roller (730) includes: The glue roller body (733) has an internal cavity. Multiple glue-applying holes (734) are formed on the glue-applying roller body (733); the multiple glue-applying holes (734) are arranged in an array on the glue-applying roller body (733); The positioning tube (735) is fixed at one end of the upper glue roller body (733) and is distributed in a straight line; the column center line of the positioning tube (735) and the column center line of the upper glue roller body (733) are on the same straight line; the positioning tube (735) and the cavity are connected.

3. The self-adhesive bandage processing device according to claim 2, characterized in that, The adhesive roller (730) also includes: The drive shaft (732) is fixed at the other end of the glue roller body (733) and is arranged in a straight line; the column center line of the drive shaft (732) and the column center line of the glue roller body (733) are on the same straight line; Support base 1 (731) is used to support drive shaft (732); drive shaft (732) rotatably passes through support base 1 (731) and is rotatably mounted on the output shaft of drive motor via coupling; A second support seat (736) with an internal glue-applying cavity is rotatably mounted on the end of a positioning tube (735); the glue-applying cavity of the second support seat (736) is connected to the positioning tube (735) through the end opening of the positioning tube (735); Connecting tube (737) is used to supply glue to the glue application cavity.

4. The self-adhesive bandage processing device according to claim 1, characterized in that, The sealing element (710) includes: Guide rail (711); A sealing cylinder (712) is mounted on the guide rail (711).

5. The self-adhesive bandage processing apparatus according to claim 4, characterized in that, The guide rail (711) includes: The guide rail body (7111) is used for assembling the sealing cylinder (712); The support plate (7112) is fixed on the guide rail body (7111); One end of the electric telescopic rod (7113) is fixed to the support plate (7112); The upright plate (7114) is fixed at the other end of the electric telescopic rod (7113); the upright plate (7114) and the guide rail body (7111) are vertically distributed.

6. The self-adhesive bandage processing apparatus according to claim 5, characterized in that, The sealing cylinder (712) includes multiple sealing rings (713), which are arranged in a straight line; the multiple sealing rings (713) are independent of each other; the sealing rings (713) are used to squeeze and fit on the outside of the glued cotton (720) and the glued roller (730).

7. The self-adhesive bandage processing apparatus according to claim 6, characterized in that, The sealing ring (713) includes: A slider (7132) is slidably mounted on the guide rail body (7111). The connecting plate (7133) is fixed on the slider (7132); One end of the electric telescopic rod (7131) is fixed to the connecting plate (7133); the other end of the electric telescopic rod (7131) is fixed to the connecting plate (7133) of the adjacent sealing ring (713).

8. The self-adhesive bandage processing apparatus according to claim 7, characterized in that, The guide rail body (7111) is made of magnetic metal material; an electromagnetic coil is laid on the slider (7132), and the presence or absence of magnetism of the slider (7132) can be determined by switching the electromagnetic coil on and off; the slider (7132) becomes magnetic after being energized, and the slider (7132) can be magnetically attracted and limited on the guide rail body (7111).

9. The self-adhesive bandage processing apparatus according to claim 7, characterized in that, The sealing ring (713) also includes: The outer positioning ring (7134) is fixed at the end of the connecting plate (7133); The inner sealing ring (7135) is inserted inside the outer positioning ring (7134); the column center line of the inner sealing ring (7135) and the column center line of the outer positioning ring (7134) are on the same straight line.

10. A processing method for a self-adhesive bandage processing apparatus according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1, Preparation S1. Substrate and equipment in place: Align the unwinding path of the self-adhesive bandage substrate (800) to prepare it for entry into the coating roller (200) area; Ensure that the glue cover (500) and its internal multiple glue roller structures (700) are installed in place; S2, Start the glue supply system: Start the glue supply system of the glue tank (100) so that the glue is pre-delivered and filled into the internal cavity of the glue roller body (733) through the connecting hose, connecting pipe (737) and positioning pipe (735); S3, Preset sealing width: Based on the target width of the self-adhesive bandage to be produced, start the electric telescopic rod one (7113) on the sealing component (710); the electric telescopic rod one (7113) pushes the guide rail body (7111) and the sealing cylinder (712) to move along the axial direction of the glue roller (730) to perform physical sealing from the roller end in order to accurately match the coating width; Step 2: Apply adhesive gradually using multiple rollers. S1. Start rotation and impregnation: Simultaneously start the drive motors of the coating roller (200) and each glue roller structure (700); the drive motor drives the glue roller body (733) and the coating roller (200) to rotate in opposite directions through the drive shaft (732); at the same time, glue continuously seeps out from the inner cavity of the roller body through the glue hole (734) and impregnates the glue cotton (720) wrapped on the outer layer of the roller body. S2, Performing incremental glue application: Multiple glue application roller structures (700) distributed in an array sequentially contact the surface of the coating roller (200); each glue application roller transfers a uniform and quantitative amount of glue to the surface of the coating roller through its moist glue application cotton (720), and through multiple stacking and flattening, an extremely uniform and stable glue layer is formed on the surface of the coating roller. Step 3: Dynamic Width and Mode Adjustment S1. Continuous width adjustment: If it is necessary to switch between different widths of self-adhesive bandages (800) during production, the electric telescopic rod (7113) can be dynamically adjusted again to drive the sealing cylinder (712) to move to a new position for stepless continuous adjustment of coating width. S2, Complex Pattern Sealing: When it is necessary to produce special types of bandages such as segmented gluing, the electric telescopic rod two (7131) can be activated; by controlling its extension and retraction, multiple sealing rings (713) in the sealing cylinder (712) can be separated or combined to form one or more independent sealing points in the axial direction of the gluing roller; multiple discontinuous gluing areas can be created on the same roller to adapt to complex coating pattern requirements. Step 4, Coating and Continuous Operation S1. Final coating completed: The coating roller (200), which has been evenly coated with adhesive, transfers the adhesive on its surface precisely and evenly to the self-adhesive bandage (800) substrate passing beneath it during rotation, thus completing the coating operation. S2, Closed-loop control and continuous production: During operation, glue is continuously supplied, and each glue roller (730) continuously applies glue in a progressive manner. At the same time, the coating mode can be adjusted at any time through the sealing part (710) according to the production instructions.

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