A water-absorbing roller for OLED mask production

Abstract

The utility model discloses a kind of water-absorbing roller shafts for OLED MASK production, including roller shaft and water-absorbing sponge outside roller shaft;Roller shaft is hollow roller shaft with hollow cavity, hollow cavity section is trapezoidal and large end through roller shaft forms opening, opening is equipped with sealing flow guide component, roller shaft surface opens trapezoidal column water-absorbing hole, from outer surface to inner surface gradually expands;Sealing flow guide component contains sealing panel and middle installation hole is opened and horn-shaped flow guide plate is installed in inner side installation hole, the small end of flow guide plate is close to installation hole, and large end is connected roller shaft wall, inner side is equipped with flow guide groove, rotating joint is installed in installation hole outer side and is connected pipeline;The water-absorbing roller can efficiently absorb water, directional flow guide liquid discharge, prevent water to stay in water-absorbing roller, to affect the water-absorbing efficiency of water-absorbing sponge.

Description

Technical Field

[0001] This utility model relates to the field of OLED display device manufacturing technology, and in particular to a water-absorbing roller shaft used in OLED MASK production. Background Technology

[0002] In the production process of OLED mask (organic light-emitting diode mask), the mask needs to have micron- or even nanometer-level pattern precision and extremely high surface cleanliness. The production environment has extremely stringent requirements for moisture control and impurity isolation. If there is residual moisture in the production area, it can easily lead to oxidation of the metal layer on the mask surface, corrosion of the photolithography pattern, or poor adhesion to the substrate. If dust, fibers, or other impurities are mixed in, they will directly block the fine openings of the mask, affecting the accuracy of subsequent OLED pixel evaporation, and ultimately causing defects such as dead pixels, color difference, and uneven brightness in the display product. However, existing absorbent rollers used in this scenario generally have design flaws and fail to meet production requirements: On the one hand, most absorbent rollers use solid roller bodies or simple hollow structures, lacking effective sealing and directional flow design. After the outer absorbent sponge absorbs water, the water easily diffuses and stagnates disorderly inside the roller body, causing the sponge to quickly become saturated and the water absorption efficiency to drop sharply. Moreover, some structures have insufficient sealing performance, posing a risk of liquid leakage from the gaps in the roller body, further contaminating the production environment. On the other hand, the water absorption holes of existing absorbent rollers are mostly designed with a uniform diameter, which cannot prevent the absorbent sponge from being squeezed and rubbed for a long time. The detached fiber debris can easily clog the internal channels of the roller, increasing the frequency of equipment failures and maintenance costs. Furthermore, the single aperture size results in greater resistance to water flow, exacerbating water retention in the absorption holes and indirectly affecting the sponge's continuous water absorption capacity. In addition, some absorption rollers are not adapted to the production scenario of "roller rotation operation and fixed pipeline drainage". The connection structure between the drainage pipeline and the roller lacks rotational compatibility, which can easily lead to pipeline twisting and breakage due to roller rotation, or liquid leakage due to seal failure. This makes it impossible to ensure the continuity and stability of the production process. These problems together restrict the improvement of the production quality and efficiency of OLED MASK. Utility Model Content

[0003] The purpose of this invention is to provide a water-absorbing roller shaft for OLED MASK production, which solves the above-mentioned problems.

[0004] This utility model is achieved through the following technical solution: A water-absorbing roller for OLED MASK production includes a roller and an absorbent sponge outside the roller. The roller is a hollow roller with a hollow cavity. The cross-section of the hollow cavity of the roller is trapezoidal, and the larger end of the hollow cavity passes through the roller to form an opening. A sealing and guiding component is provided at the opening. Water-absorbing holes in the shape of trapezoidal columns are opened on the surface of the roller.

[0005] Furthermore, The sealing and guiding assembly includes a sealing panel and a guide plate. The sealing panel is located at the opening of the roller shaft, and an installation hole is opened in the middle of the sealing panel. A trumpet-shaped guide plate is arranged around the installation hole on the side of the sealing panel facing the hollow cavity. The edge of the other end of the guide plate is sealed to the roller shaft wall.

[0006] Furthermore, The smaller end of the guide plate, which is flared in shape, is positioned around the mounting hole, while the larger end is connected to the roller wall. A guide groove is formed on the inner side of the guide plate along the direction from the larger end to the smaller end.

[0007] Furthermore, The mounting hole is used to install a rotary joint on the outside of the sealing panel, and the other end of the rotary joint is connected to a pipe.

[0008] Furthermore, The water absorption holes gradually expand from the outer surface of the roller shaft to the inner surface of the roller shaft.

[0009] The beneficial effects of this utility model are: 1. The sealing panel precisely seals the opening of the hollow cavity in the roller, preventing external dust and impurities from entering the roller and contaminating the flow guide structure or causing blockages, while also preventing the liquid collected inside from leaking out of the opening. The trumpet-shaped flow guide plate, which is sealed to the roller wall, further enhances the sealing effect and eliminates the risk of liquid seepage through gaps. At the same time, it can also initially gather the liquid entering through the water suction hole, concentrating the dispersed liquid in the area covered by the flow guide plate, preventing the liquid from spreading randomly inside the roller. This meets the strict requirements for equipment cleanliness and operational stability in the OLED MASK production process.

[0010] 2. The guide plate adopts a trumpet-shaped contraction design with the large end connected to the roller wall and the small end surrounding the mounting hole. This creates a gradient space inside the roller from the edge to the center mounting hole, naturally guiding the liquid entering from the suction holes towards the mounting hole and preventing disorderly liquid diffusion. At the same time, the guide grooves opened on the inner side of the guide plate along the direction from the large end to the small end serve as dedicated liquid channels, accurately orienting the flowing liquid and preventing it from flowing randomly on the surface of the guide plate. This significantly reduces the residence time or accumulation of liquid inside the roller, effectively improving the overall water absorption-drainage circulation efficiency and meeting the rapid moisture handling requirements of OLED MASK production.

[0011] 3. The small aperture on the outer surface of the suction holes precisely matches the absorbent sponge on the outside of the roller, preventing fibers and debris generated during the sponge's absorption process from entering the roller. This avoids clogging of critical components such as the guide channels and rotary joints, reducing equipment failure frequency and effectively extending the service life of the suction roller. Meanwhile, the large aperture on the inner surface of the suction holes significantly reduces the flow resistance of liquid entering the hollow cavity from the suction holes, allowing the liquid to enter the roller quickly and smoothly. This prevents liquid from stagnating in the suction holes due to excessively small apertures, which would affect the continuous absorption capacity of the absorbent sponge. At the same time, the "small outer, large inner" structure also creates a slight "drainage effect," assisting the liquid to flow into the roller, thus improving the overall unobstructed flow and absorption efficiency of the suction holes and ensuring that the suction roller is stably adapted to OLED MASK production. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the cross-sectional structure of this utility model; Figure 2 This is a schematic diagram of the air deflector.

[0013] The attached diagram shows the markings and corresponding component names: 1-Absorbent roller, 10-Roller shaft, 101-Absorbent hole, 11-Sealing guide assembly, 110-Sealing panel, 111-Guide plate, 1110-Guide groove, 12-Absorbent sponge, 13-Rotary joint, 14-Pipe, 15-Hollow cavity. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0015] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" 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 can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] See the example. Figures 1 to 2 : A water-absorbing roller for OLED MASK production includes a roller 10 and a water-absorbing sponge 12 outside the roller 10. The roller 10 is a hollow roller 10 with a hollow cavity 15. The cross-section of the hollow cavity 15 of the roller 10 is trapezoidal, and the larger end of the hollow cavity 15 passes through the roller 10 to form an opening. A sealing and guiding component 11 is provided at the opening. Water-absorbing holes 101 in the shape of trapezoidal columns are opened on the surface of the roller 10.

[0018] Furthermore, The sealing and guiding assembly 11 includes a sealing panel 110 and a guide plate 111. The sealing panel 110 is disposed at the opening of the roller shaft 10, and an installation hole is opened in the middle of the sealing panel 110. A trumpet-shaped guide plate 111 is disposed around the installation hole on the side of the sealing panel 110 facing the hollow cavity 15. The edge of the other end of the guide plate 111 is sealed to the wall of the roller shaft 10.

[0019] The sealing panel 110 directly seals the opening of the hollow cavity 15 in the roller shaft 10, which can effectively prevent external dust and impurities from entering the interior of the roller shaft 10, avoid contamination or blockage of the internal flow guiding structure, and prevent the liquid collected inside the roller shaft 10 from leaking from the opening, thus ensuring the airtightness of the internal environment of the roller shaft 10. On the other hand, the trumpet-shaped flow guide plate 111 further enhances the overall sealing effect through its sealed connection with the wall of the roller shaft 10, eliminating the risk of liquid seeping out from the gap between the flow guide plate 111 and the wall of the roller shaft 10. Moreover, the trumpet shape prepares for subsequent directional flow, taking into account both the airtightness and the initial efficiency of liquid flow.

[0020] Furthermore, The smaller end of the guide plate 111, which is horn-shaped, is disposed around the mounting hole, while the larger end is connected to the wall of the roller shaft 10. A guide groove 1110 is formed on the inner side of the guide plate 111 along the direction from the larger end to the smaller end.

[0021] The constricted shape of the guide plate 111, with its large end connected to the wall of the roller shaft 10 and its small end near the mounting hole, creates a gradient space from the edge to the center (mounting hole) inside the roller shaft 10. This naturally guides the liquid entering through the suction hole 101 from all parts of the roller shaft 10 towards the mounting hole, preventing the liquid from spreading disorderly inside the roller shaft 10. Secondly, the inner guide groove 1110, as a dedicated liquid channel, can precisely orient the flowing liquid, preventing it from flowing randomly on the surface of the guide plate 111. This allows the liquid to flow quickly from the large end to the small end along the guide groove 1110, and finally efficiently converge near the mounting hole. This lays the foundation for the subsequent discharge of the liquid through the rotary joint 13, preventing the liquid from stagnating and accumulating inside the roller shaft 10, and improving the overall water absorption-discharge circulation efficiency.

[0022] Furthermore, The mounting hole provides access to a rotary joint 13 on the outside of the sealing panel 110. The rotary joint 13 is connected to a pipe 14 and a vacuum pump.

[0023] In OLED MASK production, the absorbent roller 1 needs to rotate around its own axis to complete the water absorption operation, while the pipe 14 is usually fixed. The rotary joint 13 allows the roller 10 to rotate freely while maintaining a seal, and at the same time ensures that the liquid enters the pipe 14 steadily through the joint, avoiding the pipe 14 from being twisted or damaged due to the rotation of the roller 10, thus ensuring the safety of equipment operation. On the other hand, the vacuum pump in the pipe 14 can guide the liquid delivered by the rotary joint 13 to the external collection or treatment equipment in a timely manner, avoiding the accumulation of liquid inside the roller 10. If the liquid accumulates, it will cause the absorbent sponge 12 to become saturated and its water absorption capacity to decrease. Continuous drainage can ensure that the absorbent sponge 12 always maintains a good water absorption state, ensuring the continuity and stability of moisture control in the OLED MASK production process.

[0024] Furthermore, The water absorption hole 101 gradually expands in the direction from the outer surface of the roller 10 to the inner surface of the roller 10.

[0025] The smaller aperture on the outer surface can be precisely matched with the water-absorbing sponge 12 on the outside of the roller 10. Since the water-absorbing sponge 12 may generate a small amount of fibers or debris during the water absorption process, the small aperture can prevent these impurities from entering the roller 10, thus avoiding impurities from clogging subsequent components such as the guide groove 1110 and the rotary joint 13, reducing equipment failures and extending service life. The larger pore size on the inner surface can significantly reduce the flow resistance of liquid from the suction hole 101 into the hollow cavity 15, allowing the liquid to enter the roller 10 quickly and smoothly. This avoids liquid stagnation in the suction hole 101 due to the small pore size, which would affect the continuous water absorption capacity of the absorbent sponge 12. In addition, the gradually expanding structure of "small outside and large inside" can also form a slight "drainage effect", which helps the liquid flow from the outer surface to the inside, thus improving the unobstructed flow and water absorption efficiency of the suction hole 101. This meets the "high efficiency, stability and low failure" requirements of OLED MASK production for the suction roller 1.

[0026] The method of using this utility model is as follows: The absorbent roller 1 used in OLED mask production operates in a closed-loop, efficient manner based on the principle of "water absorption-guidance-drainage": the absorbent roller 1 uses a roller shaft 10 with a hollow trapezoidal cross-section cavity as its core carrier. A vacuum pump creates negative pressure inside the roller shaft 10, and the absorbent sponge 12 wrapped around the outside of the roller shaft 10 directly contacts the OLED. Moisture generated during the mask production process is initially captured by the absorbent sponge 12. Subsequently, the negative pressure inside the roller 10 causes the water absorbed by the sponge to flow to the trapezoidal column water absorption holes 101 on the surface of the roller 10 and enter the roller 10. The structure of the water absorption holes 101, which "gradually expand from the outer surface to the inner surface of the roller 10", not only blocks impurities such as fibers and debris that may fall off the absorbent sponge 12 through the small diameter on the outside, preventing internal component blockage, but also reduces the water flow resistance with the large diameter on the inside, and with a slight "drainage effect", allows the water to smoothly enter the hollow cavity 15 of the roller 10. The water entering the hollow cavity 15 is guided by the sealing and guiding component 11 inside the cavity - in this component, the sealing panel 110 seals the roller 10. The cavity 15 has an open end to isolate impurities and prevent leakage. The inner side of the cavity 15 is surrounded by a funnel-shaped guide plate 111 (the large end is connected to the wall of the roller shaft 10, and the small end is close to the mounting hole). Combined with the guide groove 1110 opened on the inner side of the guide plate 111 along the "large end to small end" direction, a directional channel is constructed to converge from the edge of the roller shaft 10 to the mounting hole, so that the dispersed water can quickly converge to the vicinity of the mounting hole along the guide groove 1110. Finally, the rotary joint 13 connected to the outside of the mounting hole ensures that the roller shaft 10 rotates to absorb water without twisting the fixed pipe 14, while stably guiding the converged water into the pipe 14, and finally discharging it to the external collection or treatment equipment. This avoids water accumulation in the roller shaft 10, which would cause the absorbent sponge 12 to become saturated. This ensures that the absorbent roller 1 can continuously maintain the water control capability of the OLED MASK production environment, and achieves efficient, stable and continuous water absorption operation.

[0027] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A water-absorbing roller for OLED mask production, comprising a roller (10) and an absorbent sponge (12) outside the roller (10), characterized in that, The roller (10) is a hollow roller (10) with a hollow cavity (15). The cross section of the hollow cavity (15) of the roller (10) is trapezoidal, and the larger end of the hollow cavity (15) passes through the roller (10) to form an opening. A sealing and guiding component (11) is provided at the opening. A water absorption hole (101) in the shape of a trapezoidal column is opened on the surface of the roller (10).

2. The absorbent roller shaft for OLED MASK production according to claim 1, characterized in that, The sealing and guiding assembly (11) includes a sealing panel (110) and a guide plate (111). The sealing panel (110) is located at the opening of the roller (10), and an installation hole is opened in the middle of the sealing panel (110). A trumpet-shaped guide plate (111) is provided around the installation hole on the side of the sealing panel (110) facing the hollow cavity (15). The edge of the other end of the guide plate (111) is sealed to the wall of the roller (10).

3. The absorbent roller shaft for OLED MASK production according to claim 2, characterized in that, The smaller end of the guide plate (111) is arranged around the mounting hole, and the larger end is connected to the wall of the roller (10). A guide groove (1110) is opened on the inner side of the guide plate (111) along the direction from the larger end to the smaller end.

4. The water-absorbing roller shaft for OLED MASK production according to claim 2, characterized in that, The mounting hole is used to install a rotary joint (13) on the outside of the sealing panel (110), and the rotary joint (13) is connected to a pipe (14) and a vacuum pump.

5. The absorbent roller shaft for OLED MASK production according to claim 1, characterized in that, The water absorption hole (101) gradually expands from the outer surface of the roller (10) to the inner surface of the roller (10).

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