Coating machine

Abstract

The utility model relates to a coating machine, and relates to the field of optical film coating machines, the coating machine comprises a mold roller, a pressing wheel and a rubber blocking plate arranged between the mold roller and the pressing wheel, the rubber blocking plate is provided with a first side face and a second side face, an air channel is formed in the rubber blocking plate, the air channel is externally connected with an air supply pipeline, and the first side face and the second side face are communicated through the air supply pipeline. The air channel extends to the first side surface and the second side surface; gaps are reserved between the first side face and the die roller and between the second side face and the pressing wheel. In the working process, the air supply pipeline conveys air to the first side face and the second side face of the glue blocking plate through the air channel, an air wall is formed between the mold roller and the pressing wheel, and the air wall can separate glue from the side faces, prevent the glue from overflowing, reduce accumulation of the glue between the glue blocking plate and the roller wheel and prevent the glue from entering the mold roller. And gaps among the rubber baffle, the mold roller and the pressing wheel can prevent the rubber baffle from being in direct contact with the roller, so that the abrasion of the rubber baffle is reduced, and the service life is prolonged.

Description

Technical Field

[0001] This application relates to the field of optical film coating machines, and more particularly to a coating machine. Background Technology

[0002] In the production of microstructured optical films, the UV curing process of a coating machine is typically used to apply UV-curable adhesive to the substrate surface and achieve rapid curing of the adhesive through UV light irradiation. This process usually requires close pressing between a mold roller and a pressure roller during UV curing to achieve high-precision transfer of the microstructure. At this point, the UV-curable adhesive must be evenly and precisely filled onto the surface of the mold roller to ensure perfect transfer of the microstructure pattern and to avoid excessive flow and overflow of the adhesive.

[0003] During the operation of the coating machine, adhesive usually accumulates between the pressure roller and the die roller before being injected into the UV-curing area. To effectively prevent adhesive from overflowing during the pressing process and affecting the quality of the UV-cured film, adhesive baffles need to be installed on both sides to prevent adhesive from leaking along the sides of the pressing area.

[0004] However, existing glue baffles present certain technical challenges in use. First, to ensure close contact between the glue baffle and the microstructure molding die and pressure roller, the position and pressure of the glue baffle need to be precisely adjusted. In actual production, the adjustment process is complex and time-consuming; any slight deviation can lead to insufficient contact between the glue baffle and the die roller or pressure roller, thus failing to effectively prevent glue leakage and affecting production stability and product quality.

[0005] Furthermore, due to the prolonged contact between the baffle plate and the mold rollers and pressure rollers under high pressure and high friction, the surface of the baffle plate is prone to wear, leading to the generation of debris that flows into the imprinting area, contaminating the microstructure mold and damaging the microstructure rollers. In addition, if the position of the baffle plate deviates during the imprinting process, it may become trapped between the mold rollers or pressure rollers, causing damage to the baffle plate. This affects the service life of the baffle plate and the stability of the production process, increases the frequency of equipment maintenance, and ultimately raises production costs.

[0006] Therefore, there is an urgent need for a new adhesive baffle design that can prevent adhesive leakage and improve wear resistance and service life in order to meet the requirements for precision and stability in the production process of microstructured optical films. Utility Model Content

[0007] In order to prevent glue leakage while improving wear resistance and service life, this application provides a coating machine.

[0008] The coating machine provided in this application adopts the following technical solution:

[0009] A coating machine includes a die roller and a pressure roller, and further includes a baffle plate disposed between the die roller and the pressure roller. The baffle plate has a first side and a second side, and an air passage is formed inside the baffle plate. The air passage is connected to an air supply pipe and extends to the first side and the second side. Gaps are left between the first side and the second side and the die roller and the pressure roller.

[0010] By adopting the above technical solution, during the production process, the air supply pipeline delivers air to the first and second sides of the baffle plate through the air passage. The airflow is discharged at a certain pressure through the side of the baffle plate, forming an airflow barrier, or "air wall," between the mold roller and the pressure roller. The air wall can effectively separate the glue from the side, preventing the glue from overflowing through the baffle plate and reducing the chance of glue accumulating between the baffle plate and the rollers. This prevents the glue from entering the small parts of the microstructure mold and avoids contamination or damage to the surface of the microstructure mold when the glue overflows. Since a certain gap is maintained between the baffle plate and the mold roller and the pressure roller, the situation where the traditional baffle plate needs to be in direct contact with the rollers is avoided, reducing friction with the rollers, thereby reducing the wear of the baffle plate and extending its service life.

[0011] In one specific implementation, the gas passage includes a main gas supply channel and multiple gas supply branch slots, one end of the multiple gas supply branch slots being connected to the main gas supply channel, and the other end extending to the first side or the second side.

[0012] By adopting the above technical solution, each air supply branch channel accurately delivers airflow to the side of the baffle plate. The airflow can be evenly distributed to the first and second sides of the baffle plate, avoiding local glue leakage or poor flow that may be caused by uneven airflow, thereby improving the stability and reliability of the air wall and ensuring that the glue overflow problem is controlled.

[0013] In one specific implementation, the number of gas supply branch slots on the first side is the same as the number on the second side.

[0014] By adopting the above technical solution, since the number of air supply branch slots is the same, the formation of the air wall is symmetrical on both sides, which brings stronger airflow balance. The symmetrical airflow can effectively maintain the air pressure on both sides of the baffle plate, avoid local airflow being too strong or too weak, and thus ensure the stability and reliability of the airflow barrier.

[0015] In one specific implementation scheme, multiple gas supply branch slots are distributed in a staggered, leaf-vein-like manner on the main gas supply channel.

[0016] By adopting the above technical solution and using a staggered distribution like leaf veins, the airflow can be distributed more evenly to the target area, avoiding situations where the airflow is too concentrated or uneven, thereby optimizing the airflow path and making the airflow distribution of the entire system more reasonable, thus improving work efficiency and effectiveness.

[0017] In one specific implementation scheme, the main gas supply channel is vertically arranged, and the plurality of gas supply branch slots are arranged at acute angles to the main gas supply channel.

[0018] By adopting the above technical solution, the acute angle setting will generate a certain oblique force when the airflow comes into contact with the air supply branch slot, thereby improving the contact efficiency between the airflow and the controlled surface, enabling the airflow to act more effectively on the target area and form a strong airflow barrier; and through the acute angle design, the airflow in the branch slot will be smoother than when it is set at a parallel or right angle, reducing the turbulence and resistance generated when the airflow turns.

[0019] In one specific implementation, the multiple gas supply branch slots are at the same angle to the main gas supply channel.

[0020] By adopting the above technical solution, when multiple gas supply branch slots form the same angle with the main gas supply channel, the airflow will be evenly distributed to each branch slot, thereby ensuring that the airflow in each branch slot is relatively consistent, so that the airflow flows evenly in each branch slot.

[0021] In one specific implementation, the width and depth of the plurality of gas supply branch slots are all the same.

[0022] By adopting the above technical solutions, it is possible to ensure that the airflow is evenly distributed in each air supply branch slot, avoid unbalanced airflow load, improve the overall efficiency of the system, and simplify the design and manufacturing process, and optimize airflow control and management.

[0023] In one specific implementation, the gas supply branch slot is a circular slot.

[0024] By adopting the above technical solution, the circular groove design enables the airflow to be evenly distributed along the groove wall, avoiding uneven airflow in corners or edge areas and improving the overall airflow stability; it also enables the airflow to maintain straight-line movement, reducing flow loss and maintaining the stability of the airflow.

[0025] In one specific implementation, the first side and the second side are set as concave arc surfaces, and the curvature of the first side and the second side are respectively matched with the structure of the mold roller and the pressure roller.

[0026] By adopting the above technical solution, the concave arc design allows the side of the glue baffle to more accurately fit the curved surfaces of the mold roller and pressure roller, ensuring the mechanical compatibility and smooth movement of the entire system; and the first and second sides have gaps with the mold roller and pressure roller, while the concave arc design of the side allows the glue baffle to maintain a relatively uniform pressure distribution during contact, thereby enhancing the sealing effect and reducing the risk of glue leakage.

[0027] In one specific implementation, the baffle plate is provided with mounting holes.

[0028] By adopting the above technical solution, the baffle plate with mounting holes can be quickly fixed to other mechanical parts on the equipment by screws, bolts or other fixing devices, without the need for a complicated assembly process, reducing installation difficulty and saving time and labor costs.

[0029] In summary, the beneficial technical effects of this application are as follows: The adhesive baffle of this application forms an airflow barrier (air wall) between the mold roller and the pressure roller, effectively preventing adhesive overflow and reducing adhesive accumulation between the baffle and the roller, thus avoiding contamination or damage to the surface of the microstructure mold; through precise airflow distribution design, the design of the main air supply channel and multiple staggered air supply branch slots ensures uniform airflow distribution and improves the stability and reliability of the air wall; at the same time, the gap design between the adhesive baffle and the roller reduces friction and wear, extends service life, and ensures the uniformity of the coating process, avoiding poor coating due to equipment vibration or errors; in addition, the compatibility of the concave arc surface of the adhesive baffle with the roller and the simple installation design further optimize the overall mechanical performance and production efficiency of the coating machine. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the baffle plate in the embodiment of this application.

[0031] Figure 2 This is a side view used to display the baffle plate.

[0032] Explanation of reference numerals in the attached drawings: 1. Baffle plate; 2. First side; 3. Second side; 4. Air passage; 5. Main air supply passage; 6. Branch air supply channel; 7. Mounting hole. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0034] Reference Figure 1 and Figure 2 This application discloses a coating machine, which is included but not limited to applications in the production process of microstructure optical films. The coating machine includes a mold roller and a pressure roller, and the tight pressing between the mold roller and the pressure roller is used to achieve high-precision transfer of microstructures.

[0035] In this embodiment, the coating machine also includes a baffle plate 1 disposed between the mold roller and the pressure roller. The baffle plate 1 is disposed on both sides of the mold roller and the pressure roller. The baffle plate 1 is used to prevent glue from overflowing between the mold roller and the pressure roller when the coating machine is working.

[0036] The baffle plate 1 includes two sides, namely the first side 2 and the second side 3. The first side 2 and the second side 3 are respectively located close to the mold roller and the pressure roller, and there are gaps between the first side 2 and the mold roller and the pressure roller. The setting of the gap can not only avoid direct contact between the traditional baffle plate 1 and the roller, reduce friction and wear, and extend its service life, but also ensure the smoothness of the coating machine during operation and avoid poor film coating problems caused by equipment errors or vibration.

[0037] The baffle plate 1 has an air passage 4 inside, which is connected to an external air supply pipeline. In this embodiment, the external air supply pipeline includes, but is not limited to, a CDA (compressed air) supply pipeline. During operation, the air supply pipeline can deliver airflow to the first side 2 and the second side 3 of the baffle plate 1. The airflow is discharged through the side of the baffle plate 1 at a certain pressure, thereby forming an airflow barrier between the mold roller and the pressure roller, which is called an "air wall".

[0038] The air wall can effectively block the contact between the glue and the two sides of the baffle plate 1, thereby preventing the glue from overflowing and reducing the accumulation of glue between the baffle plate 1 and the roller, thus preventing the glue from entering the small parts of the microstructure mold and avoiding contamination or damage to the surface of the microstructure mold when the glue overflows.

[0039] The air supply channel 4 includes a main air supply channel 5 and multiple air supply branch channels 6. The main air supply channel 5 is connected to an external air supply pipeline. One end of each of the multiple air supply branch channels 6 is connected to the main air supply channel 5, and the other end extends to the first side 2 or the second side 3. By setting the main air supply channel 5 and multiple air supply branch channels 6, each air supply branch channel 6 accurately delivers airflow to both sides of the baffle plate 1. The airflow can be evenly distributed to the first side 2 and the second side 3 of the baffle plate 1, avoiding local glue leakage or poor flow that may be caused by uneven airflow, thereby improving the stability and reliability of the air wall and ensuring that the glue overflow problem is controlled.

[0040] The number of air supply branch slots 6 on the first side 2 and the second side 3 is the same. In this embodiment, there are 3 air supply branch slots 6 extending to the first side 2 and the second side 3 respectively. The air supply branch slots 6 are distributed in a staggered leaf vein pattern on the main air supply channel 5. Through the staggered leaf vein pattern, the airflow can be distributed more evenly to the target area, avoiding the situation where the airflow is too concentrated or uneven, making the airflow distribution of the entire system more reasonable. Furthermore, since the number of air supply branch slots 6 is the same, the formation of the air wall is symmetrical on both sides, which enhances the airflow balance. The symmetrical airflow can effectively maintain the air pressure on both sides of the baffle plate 1, avoiding local airflow that is too strong or too weak, thereby ensuring the stability and reliability of the airflow barrier.

[0041] The main air supply channel 5 is vertically arranged, and multiple air supply branch channels 6 are arranged at acute angles to the main air supply channel 5. This allows the airflow to generate an oblique force when it comes into contact with the air supply branch channels 6, improving the contact efficiency between the airflow and the controlled surfaces such as the mold rollers and pressure rollers, and enhancing the effect of the airflow barrier. Furthermore, through the acute angle design, the airflow in the branch channels is smoother than when they are parallel or right-angled, reducing turbulence and resistance generated when the airflow turns.

[0042] The angles formed between the multiple air supply branch slots 6 and the main air supply channel 5 are the same, so that the airflow can be evenly distributed to each air supply branch slot 6, ensuring that the air flow of each air supply branch slot 6 is consistent, and avoiding local glue leakage or poor flow caused by uneven airflow.

[0043] The width and depth of the multiple air supply branch slots 6 are all the same, which ensures that the airflow distribution in each air supply branch slot 6 remains uniform and improves the overall operating efficiency of the system. This design not only improves the accuracy of airflow management, but also optimizes the airflow control process, ensuring the stability and reliability of the system under different operating conditions.

[0044] To further optimize airflow distribution, the air supply branch slot 6 is designed as a circular slot. The circular slot design helps the airflow to be evenly distributed along the slot wall, avoiding uneven airflow at the slot corners or edges, thereby improving the stability of the airflow and reducing flow loss. In addition, the circular slot design can maintain the straight movement of the airflow and avoid reducing the effectiveness of the airflow due to excessive flow resistance.

[0045] In this embodiment, the first side 2 and the second side 3 of the baffle plate 1 are both designed as concave arc surfaces, and the curvature of these two sides is matched with the structure of the mold roller and the pressure roller respectively. The design of the concave arc surface enables the baffle plate 1 to more accurately adapt to the curved surfaces of the mold roller and the pressure roller, thereby improving the overall mechanical adaptability and reducing the load caused by mechanical vibration or impact.

[0046] In addition, the concave arc surface design maintains a certain gap between the side of the mold roller and the pressure roller. During the contact process, the glue baffle 1 can maintain a relatively uniform pressure distribution, further enhance the sealing effect, reduce the risk of glue leakage, and thus alleviate the problem of uneven surface coating caused by equipment vibration or error, ensuring the uniformity and consistency of the coating process.

[0047] To facilitate installation, the baffle plate 1 is provided with multiple mounting holes 7, which can be, but are not limited to, threaded holes. The mounting holes 7 allow the baffle plate 1 to be easily connected to other mechanical parts (such as brackets) on the equipment by means of screws, bolts and other fixing devices, thereby making the installation process of the baffle plate 1 simpler, reducing the installation difficulty, and saving time and labor costs.

[0048] The implementation principle of this application embodiment is as follows: During the production process, glue is injected into the imprinting area between the mold roller and the pressure roller on the coating machine. In order to prevent glue from overflowing, the design of the glue baffle 1 provides an effective protective barrier. Before the operation, the glue baffle 1 is installed on both sides of the mold roller and the pressure roller, and is connected to the mechanical parts on the coating machine through the mounting holes 7 by screws, bolts and other fixing devices to complete the installation. The external CDA air supply pipeline is connected to the main air supply channel 5 of the glue baffle 1.

[0049] During operation, the external CDA air supply line provides stable compressed gas to the main air supply channel 5 of the baffle plate 1. The main air supply channel 5 distributes the airflow evenly to the first side 2 and the second side 3 of the baffle plate 1 through multiple air supply branch slots 6. The airflow is delivered to the sides of the baffle plate 1 through the air supply branch slots 6 and discharged from the first side 2 and the second side 3, forming an airflow barrier, or "wind wall", between the mold roller and the pressure roller. This wind wall can prevent the glue from overflowing and ensure that the glue only flows in the predetermined area between the mold roller and the pressure roller. As the airflow is evenly distributed on the sides of the baffle plate 1, the formed wind wall can not only effectively prevent glue leakage, but also control the flow of glue, reduce the risk of glue accumulation or uneven coating, and avoid the glue overflow and poor coating problems that may be caused by traditional baffle plates 1.

[0050] During this process, since a certain gap is maintained between the baffle plate 1 and the mold roller and pressure roller, the traditional situation where the baffle plate 1 needs to be in direct contact with the roller is avoided, reducing friction with the roller, thereby reducing wear on the baffle plate 1 and extending its service life; and since the baffle plate 1 no longer has direct contact with the mold roller and pressure roller, the problem of poor film coating caused by equipment jump or error is avoided, ensuring the uniformity of the coating process.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A coating machine, comprising a die roller and a pressure roller, characterized in that: The system includes a baffle plate (1) disposed between the mold roller and the pressure roller. The baffle plate (1) has a first side (2) and a second side (3). An air passage (4) is provided inside the baffle plate (1). The air passage (4) is connected to an air supply pipe. The air passage (4) extends to the first side (2) and the second side (3). There are gaps between the first side (2) and the second side (3) and the mold roller and the pressure roller.

2. The coating machine according to claim 1, characterized in that: The gas passage (4) includes a main gas supply passage (5) and multiple gas supply branch slots (6). One end of each of the multiple gas supply branch slots (6) is connected to the main gas supply passage (5), and the other end extends to the first side (2) or the second side (3).

3. The coating machine according to claim 2, characterized in that: The number of gas supply branch slots (6) on the first side (2) and the second side (3) is the same.

4. The coating machine according to claim 2, characterized in that: Multiple gas supply branch slots (6) are staggered in a leaf vein pattern on the main gas supply channel (5).

5. The coating machine according to claim 2, characterized in that: The main gas supply channel (5) is vertically arranged, and the multiple gas supply branch slots (6) are arranged at acute angles to the main gas supply channel (5).

6. The coating machine according to claim 5, characterized in that: The multiple gas supply branch slots (6) are at the same angle to the main gas supply channel (5).

7. The coating machine according to claim 2, characterized in that: The width and depth of the multiple gas supply branch slots (6) are all the same.

8. The coating machine according to claim 2, characterized in that: The gas supply branch groove (6) is a circular groove.

9. The coating machine according to claim 1, characterized in that: The first side (2) and the second side (3) are set as concave arc surfaces, and the curvature of the first side (2) and the second side (3) are respectively matched with the structure of the mold roller and the pressure roller.

10. The coating machine according to claim 1, characterized in that: The baffle plate (1) is provided with mounting holes (7).

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