A cutting die for folding OCA anti-overflow adhesive

Abstract

This utility model discloses a cutting die for folding OCA anti-overflow adhesive, including a frame and a cutting die body rotatably mounted on the frame, and a cooling mechanism. The cooling mechanism includes a rotating shaft installed at the end of the cutting die body, one of which is hollow. The rotating shaft is rotatably connected to the frame. A first inlet hole is evenly arranged around the circumferential sidewall of the hollow rotating shaft. A rotating ring is rotatably arranged on the outer side of the rotating shaft, and a gap is provided between the rotating ring and the rotating shaft. This gap can communicate with the rotating shaft through the first inlet hole. This cutting die for folding OCA anti-overflow adhesive, through the cooling mechanism, circulates coolant inside the cutting die body to achieve precise temperature control, which can fundamentally solve the core pain point of high-speed cutting of OCA anti-overflow adhesive, efficiently dissipating frictional heat and keeping the blade temperature stably controlled below the OCA viscosity critical point, thereby eliminating defects such as stringing and burrs at the cutting edge.

Description

Technical Field

[0001] This utility model relates to the field of cutting die, and in particular to a cutting die for folding OCA anti-overflow adhesive. Background Technology

[0002] Folding OCA anti-overflow adhesive cutting die is a precision tool developed specifically for flexible screen manufacturing. Its core function is to accurately cut the optical adhesive (OCA) and release film composite layer in high-speed production, ensuring that there is no adhesive overflow or burrs in the bending area of ​​the folding screen. This type of die mainly adopts a rotary circular pressing structure, which continuously cuts through a pair of rollers (cutting roller and bottom roller) synchronized by gears. The surface of the cutting roller is inlaid with a carbide blade with micron-level precision, which, together with the polyurethane bottom roller, provides buffer pressure. When cutting ultra-thin OCA adhesive layers, it is necessary to achieve a smooth cut surface and zero adhesive residue at the same time. This poses an extreme challenge to the thermal management and dynamic stability of the die.

[0003] During high-speed cutting, the intense friction between the blade and the OCA adhesive / release film in existing rotary cutting dies can instantly generate localized high temperatures. This is due to: the shear heating effect of the polymer material; and the heat accumulation caused by the high-speed rotation of the cutting roller. If the heat cannot be dissipated in time, it will trigger a chain reaction of problems: OCA adhesive flow transformation → molten adhesive wetting the blade surface → stringing and adhesive overflow at the cutting edge → decreased product bonding yield. More seriously, the continuous high temperature accelerates the peeling of the blade coating, forcing the production line to be shut down regularly to clean the adhesive residue, resulting in significant capacity loss. Current passive heat dissipation designs are completely unable to meet the heat load requirements of GW-level foldable screen production lines, becoming a key bottleneck restricting quality and efficiency.

[0004] Therefore, it is necessary to propose a cutting die for folding OCA anti-overflow adhesive to solve the above problems. Utility Model Content

[0005] The main purpose of this invention is to provide a cutting die for folding OCA anti-overflow adhesive, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A cutting die for folding OCA anti-overflow adhesive includes a frame and a cutting die body rotatably mounted on the frame, and a cooling mechanism. The cooling mechanism includes a rotating shaft mounted on the end of the cutting die body, one of which is hollow. The rotating shaft is rotatably connected to the frame. A first inlet hole is uniformly arranged around the circumferential sidewall of the hollow rotating shaft. A rotating ring is rotatably arranged on the outer side of the rotating shaft, and a gap is provided between the rotating ring and the rotating shaft. The gap can communicate with the rotating shaft through the first inlet hole. A cooling channel is provided on the inner side of the cutting die body, and one end of the cooling channel is connected to the hollow rotating shaft. A liquid supply pipe for supplying coolant to the rotating shaft is connected to the rotating ring. It also includes a reflux assembly, which includes a reflux pipe rotatably disposed in the middle of the inner side of the cutting die body. One end of the reflux pipe extends outward from the inner side of the hollow rotating shaft, and the other end of the reflux pipe is provided with a second inlet hole communicating with one end of the cooling channel. The reflux pipe is used to discharge the cooling fluid from the cooling channel to the outside of the cutting die body.

[0007] Preferably, a gap is provided between the end of the cooling channel near the second inlet and the outer side of the return pipe, and the gap can be connected to the return pipe through the second inlet.

[0008] Preferably, the cooling channels are located on the outer periphery of the inner side of the cutting die body, the cooling channels are evenly arranged around it, and the cooling channels are in a serpentine bend.

[0009] Preferably, a first sealed bearing is installed on the inner side of the hollow rotating shaft away from the cutting die body and on the inner side of the cutting die body near the second inlet hole, and the two ends of the return pipe are respectively fixed to the inner wall of the first sealed bearing.

[0010] Preferably, a pair of second sealed bearings are fixedly disposed on the outer side of the hollow rotating shaft, and the rotating ring is fixed on the outer side of the second sealed bearings, thereby forming a gap between the rotating ring and the rotating shaft.

[0011] Preferably, a mounting bracket corresponding to the liquid supply pipe and the return pipe is installed on one side of the frame, and the liquid supply pipe and the return pipe are both installed through the mounting bracket.

[0012] Preferably, a coolant storage tank is provided on one side of the frame, and a pump body is provided on one side of the coolant storage tank. The input end of the pump body is connected to the coolant storage tank, the end of the supply pipe away from the rotating shaft is connected to the output end of the pump body, and the end of the return pipe away from the rotating shaft is connected to the upper end of the coolant storage tank.

[0013] Preferably, a distribution plate is provided between the return pipe and the coolant storage tank. A manifold is provided at the end of the distribution plate near the return pipe. Multiple spray holes communicating with the manifold and the coolant storage tank are provided at the end of the distribution plate away from the return pipe. A cooling fan corresponding to the end of the spray hole is embedded at one end of the top of the coolant storage tank. An air outlet is provided on one side of the upper end of the coolant storage tank.

[0014] Compared with the prior art, this utility model provides a cutting die for folding OCA anti-overflow adhesive, which has the following beneficial effects: This folding OCA anti-overflow adhesive cutting die uses a cooling mechanism to precisely control the temperature by circulating coolant inside the die body. This fundamentally solves the core pain point of high-speed cutting of OCA anti-overflow adhesive, efficiently dissipating frictional heat and keeping the blade temperature stably below the OCA viscosity critical point. This suppresses the movement of the colloidal molecular chains, significantly enhances viscous cohesion, and prevents the colloidal material from wetting and spreading onto the metal blade. Adhesive residue cannot accumulate on the blade surface, thus completely eliminating defects such as stringing and burrs at the cutting edge. It also avoids production capacity loss due to downtime for cleaning adhesive residue, achieving continuous, efficient, and precise production. Furthermore, the coolant entering the die overlaps with the coolant exiting through the return pipe, allowing the entering coolant to pre-cool the exiting coolant, reducing subsequent cooling time and facilitating circulating cooling. The cutting die for this foldable OCA anti-overflow adhesive, along with the combined design of the manifold, spray nozzle, distribution plate, and cooling fan, can further cool the coolant flowing back to the coolant storage tank. The dispersed spraying combined with the cooling fan blowing achieves rapid cooling, facilitating subsequent recycling. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a cross-sectional structural diagram of the cutting die body of this utility model; Figure 4 This is a cross-sectional structural diagram of the flow divider of this utility model.

[0016] In the diagram: 1. Cutting die body; 2. Frame; 3. Coolant storage tank; 4. Cooling fan; 5. Mounting bracket; 6. Supply pipe; 7. Return pipe; 8. Pump body; 9. Diverter plate; 10. Adding port; 11. Shaft; 12. First sealed bearing; 13. First inlet hole; 14. Rotary ring; 15. Second sealed bearing; 16. Second inlet hole; 17. Cooling channel; 18. Manifold; 19. Spray hole; 20. Air outlet. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] like Figure 1-4 As shown, a cutting die for folding OCA anti-overflow adhesive includes a frame 2 and a cutting die body 1 rotatably mounted on the frame 2. It also includes a cooling mechanism, which includes a rotating shaft 11 mounted at the end of the cutting die body 1. One of the rotating shafts 11 is hollow and rotatably connected to the frame 2. A first inlet hole 13 is evenly arranged around the circumferential sidewall of the hollow rotating shaft 11. A rotating ring 14 is rotatably mounted on the outer side of the rotating shaft 11, and a gap is provided between the rotating ring 14 and the rotating shaft 11. This gap communicates with the rotating shaft 11 through the first inlet hole 13. Specifically, a pair of second sealed bearings 15 are fixedly installed on the outer side of the hollow rotating shaft 11, and the rotating ring 14 is fixed on the outer side of the second sealed bearings 15, thereby forming a gap between the rotating ring 14 and the rotating shaft 11. A cooling channel 17 is provided on the inner side of the cutting die body 1. The cooling channel 17 is located on the outer periphery of the inner side of the cutting die body 1. The cooling channel 17 is evenly arranged around the body and is serpentine. One end of the cooling channel 17 is connected to the hollow rotating shaft 11. A liquid supply pipe 6 for supplying coolant to the rotating shaft 11 is connected to the rotating ring 14.

[0019] It also includes a return assembly, which includes a return pipe 7 rotatably disposed in the middle of the inner side of the cutting die body 1. One end of the return pipe 7 passes through the inner side of the hollow rotating shaft 11 and extends outward. Specifically, the inner side of the hollow rotating shaft 11 away from the cutting die body 1 and the inner side of the cutting die body 1 near the second inlet hole 16 are both equipped with a first sealing bearing 12. The two ends of the return pipe 7 are respectively fixed to the inner wall of the first sealing bearing 12. The other end of the return pipe 7 is provided with a second inlet hole 16 that communicates with one end of the cooling channel 17. Specifically, a gap is provided between the end of the cooling channel 17 near the second inlet hole 16 and the outer side of the return pipe 7. This gap can communicate with the return pipe 7 through the second inlet hole 16. The return pipe 7 is used to discharge the coolant from the cooling channel 17 to the outside of the cutting die body 1.

[0020] In order to ensure the stability of the supply pipe 6 and return pipe 7, a mounting bracket 5 corresponding to the supply pipe 6 and return pipe 7 is installed on one side of the frame 2. The supply pipe 6 and return pipe 7 are both installed through the mounting bracket 5.

[0021] By implementing a cooling mechanism that circulates coolant inside the cutting die body 1 to achieve precise temperature control, the core pain point of high-speed cutting of OCA anti-overflow adhesive can be fundamentally solved. When the cutting die body 1 rotates at high speed, the intense friction between the blade and the OCA adhesive and release film generates instantaneous high temperatures. At this time, the viscous molecular chains of the OCA adhesive move violently due to thermal excitation, and the fluidity of the molten adhesive increases sharply, making it extremely easy to adhere to the blade surface like molten syrup. Meanwhile, the coolant circulates rapidly through the cooling channel 17 and return pipe 7 inside the cutting die body 1, efficiently dissipating the frictional heat. This process keeps the blade temperature stable below the OCA viscosity critical point, suppressing the movement of colloidal molecular chains and significantly enhancing viscous cohesion. It prevents the colloidal material from wetting and spreading onto the metal blade from the source, preventing the accumulation of adhesive residue on the blade surface. This completely eliminates defects such as stringing and burrs at the cutting edge, while avoiding production losses caused by downtime for cleaning adhesive residue. This enables continuous, efficient, and precise production. Furthermore, the coolant entering the machine overlaps with the coolant exiting through the return pipe 7, allowing the entering coolant to pre-cool the exiting coolant, reducing subsequent cooling time and facilitating circulating cooling.

[0022] In addition, in order to achieve circulating cooling, a coolant storage tank 3 is provided on one side of the frame 2, and a pump body 8 is provided on one side of the coolant storage tank 3. The input end of the pump body 8 is connected to the coolant storage tank 3, the end of the supply pipe 6 away from the rotating shaft 11 is connected to the output end of the pump body 8, and the end of the return pipe 7 away from the rotating shaft 11 is connected to the upper end of the coolant storage tank 3. The coolant storage tank 3 is provided with an inlet 10 for adding coolant.

[0023] To further cool the coolant, a distribution plate 9 is installed between the return pipe 7 and the coolant storage tank 3. A manifold 18 is provided on the inner side of the distribution plate 9 near the return pipe 7. Multiple spray holes 19 connected to the manifold 18 and the coolant storage tank 3 are provided on the outer side of the distribution plate 9 away from the return pipe 7. A cooling fan 4 corresponding to the end of the spray hole 19 is embedded in one end of the top of the coolant storage tank 3. An air outlet 20 is provided on one side of the upper end of the coolant storage tank 3. The combined arrangement of the manifold 18, spray holes 19, distribution plate 9, and cooling fan 4 can further cool the coolant returning to the coolant storage tank 3. The dispersed spraying and the blowing of the cooling fan 4 achieve rapid cooling and facilitate subsequent recycling.

[0024] In use, the pump body 8 draws coolant from the coolant storage tank 3 into the supply pipe 6, which then enters the gap between the rotating ring 14 and the rotating shaft 11. The coolant then enters the rotating shaft 11 through the first inlet hole 13, and finally enters the cooling channel 17, thereby cooling the cutting die body 1 without affecting the overall rotation of the rotating shaft 11 and the cutting die body 1. The coolant reaches the end of the cooling channel 17, enters the return pipe 7 through the second inlet hole 16, and then flows back. When it returns to the rotating shaft 11, the coolant entering the rotating shaft 11 cools the outer wall of the return pipe 7, thus achieving pre-cooling. It then reaches the manifold 18 through the return pipe 7, and finally is sprayed into the coolant storage tank 3 through the spray hole 19. The cooling fan 4 further cools the coolant by blowing it through the spray hole 20.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A cutting die for folding OCA anti-overflow adhesive, comprising a frame (2) and a cutting die body (1) rotatably mounted on the frame (2), characterized in that: It also includes a cooling mechanism, which includes a rotating shaft (11) installed at the end of the cutting die body (1). One of the rotating shafts (11) is hollow. The rotating shaft (11) is rotatably connected to the frame (2). The circumferential sidewall of the hollow rotating shaft (11) is uniformly surrounded by a first inlet hole (13). A rotating ring (14) is rotatably provided on the outer side of the rotating shaft (11). A gap is provided between the rotating ring (14) and the rotating shaft (11). The gap can be connected to the rotating shaft (11) through the first inlet hole (13). A cooling channel (17) is provided on the inner side of the cutting die body (1). One end of the cooling channel (17) is connected to the hollow rotating shaft (11). A liquid supply pipe (6) for supplying coolant to the rotating shaft (11) is connected to the rotating ring (14). It also includes a return assembly, which includes a return pipe (7) rotatably disposed in the middle of the inner side of the cutting die body (1). One end of the return pipe (7) passes through the inner side of the hollow rotating shaft (11) and extends outward. The other end of the return pipe (7) is provided with a second inlet hole (16) communicating with one end of the cooling channel (17). The return pipe (7) is used to discharge the cold liquid from the cooling channel (17) to the outside of the cutting die body (1).

2. The cutting die for folding OCA anti-overflow adhesive according to claim 1, characterized in that: A gap is provided between the end of the cooling channel (17) near the second inlet (16) and the outside of the return pipe (7), and the gap can be connected to the return pipe (7) through the second inlet (16).

3. The cutting die for folding OCA anti-overflow adhesive according to claim 1, characterized in that: The cooling channel (17) is located on the outer periphery of the inner side of the cutting die body (1). The cooling channel (17) is evenly arranged around the body and is in a serpentine bend.

4. The cutting die for folding OCA anti-overflow adhesive according to claim 1, characterized in that: The hollow rotating shaft (11) is equipped with a first sealing bearing (12) at the end away from the cutting die body (1) and at the end near the second inlet hole (16) on the inner side of the cutting die body (1). The two ends of the return pipe (7) are respectively fixed to the inner wall of the first sealing bearing (12).

5. The cutting die for folding OCA anti-overflow adhesive according to claim 1, characterized in that: A pair of second sealed bearings (15) are fixedly provided on the outside of the hollow rotating shaft (11), and the rotating ring (14) is fixed on the outside of the second sealed bearings (15), thereby forming a gap between the rotating ring (14) and the rotating shaft (11).

6. The cutting die for folding OCA anti-overflow adhesive according to claim 1, characterized in that: The frame (2) is equipped with a mounting bracket (5) corresponding to the liquid supply pipe (6) and the return pipe (7) on one side. The liquid supply pipe (6) and the return pipe (7) are both installed through the mounting bracket (5).

7. A cutting die for folding OCA anti-overflow adhesive according to any one of claims 1-6, characterized in that: A coolant storage tank (3) is provided on one side of the frame (2), and a pump body (8) is provided on one side of the coolant storage tank (3). The input end of the pump body (8) is connected to the coolant storage tank (3), and the end of the liquid supply pipe (6) away from the rotating shaft (11) is connected to the output end of the pump body (8). The end of the return pipe (7) away from the rotating shaft (11) is connected to the upper end of the coolant storage tank (3).

8. The cutting die for folding OCA anti-overflow adhesive according to claim 7, characterized in that: A distribution plate (9) is provided between the return pipe (7) and the coolant storage tank (3). A manifold (18) is provided at the end of the distribution plate (9) near the return pipe (7). A plurality of spray holes (19) communicating with the manifold (18) and the coolant storage tank (3) are provided at the end of the distribution plate (9) away from the return pipe (7). A cooling fan (4) corresponding to the end of the spray hole (19) is embedded at one end of the top of the coolant storage tank (3). An air outlet (20) is provided on one side of the upper end of the coolant storage tank (3).

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