A double-sided adhesive tape applying mechanism and method

Abstract

The application discloses a bandage double-sided gluing mechanism and method, which comprises a support, a vertical material flow channel is arranged in the middle of the support, a parallelogram glue applying support and a hot plate are arranged in the material flow channel in mirror image, a glue box, a glue applying roller and a glue applying roller are assembled on the glue applying support, the glue applying roller and the glue applying roller are in rolling contact to realize automatic glue supplement, a glue applying driving cylinder drives a glue applying driving shaft to swing through a rack sector gear, shunt and collecting valves are arranged on both sides of the cylinder to ensure synchronous action, both sides of the hot material shaft realize synchronous opening and closing of the hot plate through synchronous gears which are in mesh with each other, and the glue applying roller and the hot plate can act on the same position of the bandage. The application also discloses a gluing method, after the bandage is taken away, both sides of the glue applying roller are synchronously clamped to complete double-sided gluing, and the glue applying roller is automatically prepared for gluing during resetting, and then the hot plate is used for heating and curing the gluing position. The application can integrate the gluing and curing processes, avoids high-temperature damage to the elasticity of the bandage, realizes uniform gluing and good synchronism, improves the medical safety of products, and is suitable for continuous edge sealing production of medical elastic bandages.

Description

Technical Field

[0001] This invention relates to the field of medical dressing production equipment technology, and in particular to a double-sided adhesive coating mechanism and method for bandages. Background Technology

[0002] Elastic bandages are commonly used medical wound dressings and joint immobilization protective consumables in clinical practice. Their base material is generally made of spandex-blended elastic fabric, with elastic fiber bundles interwoven within the fabric, possessing excellent tensile resilience to meet the needs of bandaging, fitting, and protective fixation. Current conventional processing methods for elastic bandages often involve cutting first and then finishing. Under the shearing force of cutting, the elastic yarns are prone to slippage and misalignment, and some fiber bundles cannot be completely cut, resulting in dotted, fraying fiber ends on the cut surface of the bandage. These free fibers easily detach, producing fine debris. When the bandage is used for wound dressing, this detached fiber debris can easily contaminate the wound surface, posing a risk of wound irritation and infection, significantly reducing the safety and quality of the elastic bandage in medical use.

[0003] To improve the defects of rough edges and fiber shedding at the cuts of elastic bandages, the mainstream improvement methods in the industry mainly include two processes: hot-melt cutting and pre-coated edge sealing. Hot-melt cutting relies on high temperature to melt the fibers to achieve edge sealing, but high temperature can easily cause thermal degradation of spandex fibers, resulting in decreased elasticity at the cut, hardening and brittleness of the material, and damage to the overall elasticity and resilience of the bandage. Although conventional pre-coated edge sealing can eliminate rough edges, traditional processing equipment has limited functionality. Existing bandage coreless roll-up equipment does not integrate adhesive sealing functions, and cannot simultaneously complete automated double-sided adhesive sealing during bandage roll-up processing. This results in the adhesive sealing process being disconnected from the cutting and roll-up processes, leading to poor production continuity, low automation, and difficulty in achieving integrated continuous precision processing of elastic bandages. This fails to meet the large-scale, high-precision, and high-efficiency production requirements of high-quality medical elastic bandages. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing bandage sealing process is prone to damage to elasticity, the equipment cannot integrate double-sided gluing, the process is fragmented, and the production continuity and automation are low.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a bandage double-sided adhesive application mechanism, including a bracket, an adhesive application bracket with a parallelogram structure installed inside the bracket, an adhesive box installed on the top of the feeding bracket, an adhesive application roller rotatably arranged at the end of the adhesive box, and an ironing plate rotatably arranged inside the bracket. A material flow channel is vertically arranged in the middle of the bracket. The ironing plate and the adhesive application bracket are arranged mirror-symmetrically along the material flow channel inside the bracket. The ironing plate is located between the material flow channel and the adhesive application bracket. When both the adhesive application bracket and the ironing plate are rotated to the vertical state, the ironing plate and the adhesive application roller are in contact with the same position of the material flow channel.

[0006] Preferably, the adhesive application bracket includes two adhesive application drive shafts arranged in parallel at the bottom, an adhesive application swing arm fixedly installed on the adhesive application drive shaft, and a connecting shaft rotatably connected to the top of the adhesive application swing arm. The connecting shaft is arranged parallel to the adhesive application drive shaft, and the connecting shaft and the adhesive application drive shaft are connected by at least two adhesive application swing arms. The same end of the two connecting shafts is connected by a mounting arm, and the mounting arm is rotatably connected to the connecting shaft. The adhesive box is installed between the two mounting arms at both ends of the connecting shaft.

[0007] Preferably, an applicator roller is rotatably disposed between the two mounting arms. The applicator roller is located inside the glue box and rolls in contact with the glue coating roller. A drive motor for driving the applicator roller to rotate is fixedly connected to the mounting arm.

[0008] Preferably, an adhesive application drive cylinder for driving the adhesive application drive shaft to rotate is installed on the outer side wall of the bracket. A slider is coaxially fixedly connected to the output end of the adhesive application drive cylinder. A rack is fixedly installed on one side of the slider. An adhesive application gear is coaxially fixedly connected to the end of the adhesive application drive shaft. The rack meshes with the adhesive application gear.

[0009] Preferably, the glued gear is a sector gear.

[0010] Preferably, a slider mounting plate is fixed on the side wall of the bracket, and slide bars are bolted to both edges of the side wall of the slider mounting arm. The slider is slidably disposed between the two slide bars, and the rack is located on the side wall of the slider away from the slider mounting plate.

[0011] Preferably, the air inlet pipes of the two glue-applying drive cylinders located on both sides of the material flow channel are connected to a flow divider / combiner valve for synchronizing airflow.

[0012] Preferably, a hot stamping shaft is horizontally rotatably mounted inside the bracket, and a mounting bracket is fixedly connected to the back of the hot stamping plate, with the mounting bracket fixedly connected to the hot stamping shaft.

[0013] Preferably, a synchronous gear is fixedly installed at the same end of the two hot material shafts located on both sides of the material flow channel, and the two synchronous gears mesh with each other.

[0014] A method for applying adhesive to both sides of a bandage, using the aforementioned adhesive application mechanism, includes the following steps: Step 1: Vertically insert the elastic bandage to be processed into the material flow channel in the middle of the support, keeping the bandage conveyed smoothly and centered, so as to provide a stable material base for subsequent double-sided adhesive coating, ironing and curing operations; Step 2: The glue-applying drive cylinders on both sides of the material flow channel achieve synchronous airflow control through the diversion and collection valves. The drive slider and rack work together with the glue-applying gear to drive the glue-applying drive shaft to rotate synchronously, thereby driving the parallelogram-shaped glue-applying bracket to rotate to a vertical position, so that the glue-applying rollers on both sides can clamp the stretcher synchronously from both sides of the material flow channel. Step 3: The two glue-applying rollers clamp the surface of the bandage in opposite directions. Using the glue on the surface of the glue-applying rollers, the double-sided glue application is completed simultaneously on both sides of the bandage. Then, the glue-applying drive cylinder controls the glue-applying roller to reset. During the reset process, the glue-applying roller is rotated, and the glue-applying roller applies glue to the glue-applying roller during its rotation. Step 4: The two heat-pressing shafts rotate synchronously through meshing synchronous gears, causing the heat-pressing plates on both sides to synchronously adhere to the adhesive application area of ​​the bandage. This heats and dries the double-sided adhesive application area of ​​the bandage, allowing the adhesive layer to quickly solidify and set, thus completing the double-sided adhesive curing process of the bandage.

[0015] This invention provides a mechanism and method for double-sided adhesive coating of bandages, which has the following beneficial effects.

[0016] 1. The present invention sets up a parallelogram adhesive support arranged in a mirror shape, which, together with the adhesive roller, enables simultaneous double-sided adhesive application to the bandage. This allows the double-sided adhesive application and edge sealing process to be integrated into the bandage processing flow, eliminating the need to separate the adhesive application process from the cutting and rolling processes. This improves production continuity, facilitates integrated continuous precision processing, and enhances the overall level of automation and production efficiency.

[0017] 2. The glue application drive cylinders on both sides are equipped with flow divider and flow collector valves to distribute and control the air intake flow, ensuring that the glue application brackets on both sides move synchronously, and ensuring that the glue application rollers can clamp the bandage synchronously, so that the glue application on both sides of the bandage is uniform and consistent, the edge sealing quality is stable, and the problem of thin glue application or missed application caused by asynchronous movement of the two sides of the mechanism is avoided.

[0018] 3. The glue roller and the glue applicator roller roll into contact. After the glue applicator roller finishes applying glue and resets, it can automatically replenish and prepare glue without interrupting the production process, which is convenient for continuous operation of the equipment. The ends of the heat-sealing shaft are equipped with intermeshing synchronous gears to ensure that the heat-sealing plates on both sides open and close synchronously, and heat and dry the glued position synchronously, resulting in uniform edge sealing and curing effect. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a structural front view of an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure after the support on one side is hidden in an embodiment of the present invention.

[0021] Figure 3 for Figure 1 Sectional view of AA.

[0022] In the diagram: 1. Bracket; 2. Glue application drive shaft; 3. Glue application gear; 4. Glue application drive cylinder; 5. Slider mounting plate; 6. Slider; 7. Glue application swing arm; 8. Connecting shaft; 9. Mounting arm; 10. Glue box; 11. Glue application roller; 12. Glue application roller; 13. Hot stamping shaft; 14. Synchronous gear; 15. Hot stamping plate. Detailed Implementation

[0023] like Figures 1 to 3 As shown, this invention discloses a double-sided adhesive coating mechanism for bandages, including a support 1. A vertically oriented material flow channel is provided in the middle of the support 1 for vertically conveying elastic bandages. An adhesive application support and a heating plate 15 are arranged mirror-symmetrically along the material flow channel, with the heating plate 15 positioned between the material flow channel and the adhesive application support. When both the adhesive application support and the heating plate 15 are rotated to a vertical position, the heating plate 15 and the adhesive coating roller 12 can contact the same position in the material flow channel, achieving sequential adhesive application and heating curing at the same position.

[0024] like Figure 3 As shown, the adhesive application bracket has a parallelogram structure, comprising two adhesive application drive shafts 2 arranged parallel to each other at the bottom. Adhesive application swing arms 7 are fixed to the adhesive application drive shafts 2, and a connecting shaft 8 is rotatably mounted on the upper end of each adhesive application swing arm 7. The connecting shaft 8 is parallel to the adhesive application drive shafts 2. At least two adhesive application swing arms 7 form a parallelogram linkage structure between the adhesive application drive shaft 2 and the connecting shaft 8 on the same side. Mounting arms 9 are mounted between the same ends of the two connecting shafts 8, and the mounting arms 9 rotatably engage with the connecting shafts 8. The adhesive box 10 is mounted between the two mounting arms 9. The parallelogram linkage structure ensures that the adhesive box 10 and the adhesive application roller 12 maintain a horizontal posture as they swing towards or away from the bandage, allowing the adhesive application roller 12 to smoothly adhere to the bandage surface.

[0025] like Figure 1 and Figure 2 As shown, a gluing roller 11 is rotatably mounted between two mounting arms 9. The gluing roller 11 is placed inside the glue box 10 and can be soaked in glue. The gluing roller 11 rolls in contact with the coating roller 12. A drive motor is provided on the mounting arm 9 to drive the gluing roller 11 to rotate. During operation, the drive motor drives the gluing roller 11 to rotate, and the glue is transferred to the surface of the coating roller 12 through rolling contact, realizing automatic glue replenishment of the coating roller 12.

[0026] like Figure 1 and Figure 2As shown, an adhesive application drive cylinder 4 is mounted on the outer wall of the bracket 1. The output end of the adhesive application drive cylinder 4 is connected to a slider 6, and a rack is installed on the slider 6. An adhesive application gear 3 is fixed to the end of the adhesive application drive shaft 2, and the rack meshes with the adhesive application gear 3. In this embodiment, since the distance between the two adhesive application drive shafts 2 is small, the adhesive application gear 3 is a sector gear, which converts the linear output of the cylinder into a limited angle rotation of the adhesive application drive shaft 2. A slider mounting plate 5 is fixed to the side wall of the bracket 1. Slide rails are mounted on both sides of the slider mounting plate 5 by bolts. The slider 6 is slidably mounted between the two slide rails. The rack is arranged on the side of the slider 6 away from the slider mounting plate 5. The slide rails guide and limit the slider 6, ensuring smooth meshing and transmission between the rack and the adhesive application gear 3. The air inlet pipes of the two sets of adhesive application drive cylinders 4 on both sides of the material flow channel are connected to a flow divider valve to distribute the airflow of the two channels, so that the cylinders on both sides move synchronously and the left and right sets of adhesive application brackets swing in unison.

[0027] like Figure 2 and Figure 3 As shown, a heat-pressing shaft 13 is horizontally arranged inside the bracket 1. A mounting bracket is provided on the back of the heat-pressing plate 15 and fixed to the heat-pressing shaft 13. A heat-pressing motor that drives the heat-pressing shaft 13 to rotate is installed on the outer wall of the bracket 1. Synchronous gears 14 are fixed at the ends of the heat-pressing shafts 13 on both sides of the material flow channel. The two synchronous gears 14 mesh with each other. When one side of the heat-pressing shaft rotates, it will force the other side of the heat-pressing shaft 13 to swing synchronously in the opposite direction through the gear, so as to realize the synchronous opening and closing of the heat-pressing plates 15 on both sides, ensuring that the bandage is heated evenly on both sides.

[0028] A method for applying adhesive to both sides of a bandage, using the aforementioned bandage double-sided adhesive application mechanism, includes the following steps: Step 1: Vertically insert the elastic bandage to be processed into the material flow channel in the middle of the bracket 1, keeping the bandage conveyed smoothly and centered, so as to provide a stable material base for subsequent double-sided adhesive coating, ironing and curing operations.

[0029] Step 2: The glue-applying drive cylinders 4 on both sides of the material flow channel achieve synchronous airflow control through the diversion and collection valves. The drive slider 6 and the rack and pinion gear 3 drive the glue-applying drive shaft 2 to rotate synchronously, thereby driving the parallelogram-shaped glue-applying bracket to rotate to a vertical position, so that the glue-applying rollers 12 on both sides can clamp the bandage synchronously from both sides of the material flow channel.

[0030] Step 3: The two glue-applying rollers 12 clamp the surface of the bandage in opposite directions. Using the glue adhering to the surface of the glue-applying rollers 12, the double-sided glue application is completed simultaneously on both sides of the bandage. Then, the glue-applying drive cylinder 4 controls the glue-applying rollers 12 to reset. During the reset process of the glue-applying rollers 12, the glue-applying rollers 11 are rotated. During the rotation of the glue-applying rollers 11, the glue-applying rollers 12 are glued, completing the glue preparation before the next glue application.

[0031] Step 4: The two heat-pressing shafts 13 rotate synchronously through the meshing synchronous gears 14, driving the two heat-pressing plates 15 to synchronously adhere to the adhesive application position of the bandage, heating and drying the double-sided adhesive application area of ​​the bandage, so that the adhesive layer can be quickly cured and shaped, completing the double-sided adhesive curing process of the bandage; after the processing is completed, the heat-pressing plates 15 are swung back to their original positions, the bandage continues to be conveyed downwards and cut at the heat-pressing position, and the next section of adhesive application and edge sealing processing is repeated.

Claims

1. A bandage double-sided adhesive coating mechanism, characterized in that: The device includes a support (1), a parallelogram-shaped glue-applying support installed inside the support (1), a glue box (10) installed on the top of the feeding support, a glue-applying roller (12) rotatably arranged at the end of the glue box (10), and a hot plate (15) rotatably arranged inside the support (1). A material flow channel is vertically arranged in the middle of the support (1). The hot plate (15) and the glue-applying support are mirror-symmetrically arranged inside the support (1) along the material flow channel. The hot plate (15) is located between the material flow channel and the glue-applying support. When both the glue-applying support and the hot plate (15) are rotated to the vertical position, the hot plate (15) and the glue-applying roller (12) are in contact with the same position of the material flow channel.

2. The bandage double-sided adhesive coating mechanism as described in claim 1, characterized in that: The adhesive application bracket includes two adhesive application drive shafts (2) arranged in parallel at the bottom, an adhesive application swing arm (7) fixedly installed on the adhesive application drive shaft (2), and a connecting shaft (8) rotatably connected to the top of the adhesive application swing arm (7). The connecting shaft (8) is arranged in parallel with the adhesive application drive shaft (2), and the connecting shaft (8) and the adhesive application drive shaft (2) are connected by no less than two adhesive application swing arms (7). The same end of the two connecting shafts (8) is connected by a mounting arm (9), and the mounting arm (9) is rotatably connected to the connecting shaft (8). The adhesive box (10) is installed between the two mounting arms (9) at both ends of the connecting shaft (8).

3. The bandage double-sided adhesive coating mechanism as described in claim 2, characterized in that: A glue roller (11) is rotatably disposed between the two mounting arms (9). The glue roller (11) is located inside the glue box (10). The glue roller (11) rolls in contact with the glue coating roller (12). A drive motor for driving the glue roller (11) to rotate is fixedly connected to the mounting arm (9).

4. The bandage double-sided adhesive coating mechanism as described in claim 2, characterized in that: The outer wall of the bracket (1) is equipped with a glue-applying drive cylinder (4) for driving the glue-applying drive shaft (2) to rotate. The output end of the glue-applying drive cylinder (4) is coaxially fixedly connected to a slider (6). A rack is fixedly installed on one side of the slider (6). The end of the glue-applying drive shaft (2) is coaxially fixedly connected to a glue-applying gear (3). The rack meshes with the glue-applying gear (3).

5. The bandage double-sided adhesive coating mechanism as described in claim 4, characterized in that: The glued gear (3) is a sector gear.

6. The bandage double-sided adhesive coating mechanism as described in claim 4, characterized in that: A slider mounting plate (5) is fixed on the side wall of the bracket (1). Sliders are installed on both edges of the side wall of the slider mounting arm (5) by bolts. The slider (6) is slidably disposed between the two sliders. The rack is located on the side wall of the slider (6) away from the slider mounting plate (5).

7. The bandage double-sided adhesive coating mechanism as described in claim 4, characterized in that: Two glue-applying drive cylinders (4) located on both sides of the material flow channel are connected to the air inlet pipes of the cylinders for synchronizing airflow.

8. The bandage double-sided adhesive coating mechanism as described in claim 1, characterized in that: The bracket (1) is horizontally rotatably mounted with a hot material shaft (13), and the back of the hot plate (15) is fixedly connected with a mounting bracket, which is fixedly connected to the hot material shaft (13).

9. The bandage double-sided adhesive coating mechanism as described in claim 8, characterized in that: Synchronous gears (14) are fixedly installed at the same end of the two hot material shafts (13) located on both sides of the material flow channel, and the two synchronous gears (14) mesh with each other.

10. A method for applying adhesive to both sides of a bandage, characterized in that, The application of the adhesive applicator as described in any one of claims 1-9 includes the following steps: Step 1: Insert the elastic bandage to be processed vertically into the material flow channel in the middle of the bracket (1) to keep the bandage conveyed smoothly and in the center of the posture, so as to provide a stable material foundation for subsequent double-sided adhesive coating, ironing and curing operations; Step 2: The glue-applying drive cylinders (4) on both sides of the material flow channel achieve synchronous airflow control through the diversion and collection valve, drive the slider (6), and the rack and pinion gear (3) to drive the glue-applying drive shaft (2) to rotate synchronously, thereby driving the parallelogram structure glue-applying bracket to rotate to a vertical state, so that the glue-applying rollers (12) on both sides can clamp the bandage synchronously from both sides of the material flow channel. Step 3: The two glue-applying rollers (12) clamp the surface of the bandage in opposite directions. Using the glue on the surface of the glue-applying rollers (12), the double-sided glue application is completed simultaneously on both sides of the bandage. Then, the glue-applying drive cylinder (4) controls the glue-applying rollers (12) to reset. During the reset of the glue-applying rollers (12), the glue-applying rollers (11) are controlled to rotate. During the rotation of the glue-applying rollers (11), the glue is applied to the glue-applying rollers (12). Step 4: The two heat-pressing shafts (13) rotate synchronously through the meshing synchronous gears (14), driving the two heat-pressing plates (15) to synchronously adhere to the adhesive application position of the bandage, heating and drying the double-sided adhesive application area of ​​the bandage, so that the adhesive layer can be quickly cured and shaped, and the double-sided adhesive curing process of the bandage is completed.

Images