Anti-dripping glue mark device for production of anti-peep film

Abstract

The utility model discloses a kind of anti-peep film production is prevented drop glue mark device, belong to the field of anti-peep film production. Including support frame, pre-coating roller, drop glue pipe, power source etc. The pre-coating roller is set in the position between rubber wheel, mold wheel top, and with mold wheel gap setting, the pre-coating roller rotation is set on the support frame;Drop glue pipe drops glue solution on pre-coating roller, then glue is dropped to mold wheel by pre-coating roller, realizes zero contact coating, eliminates drop glue mark under the condition that microstructure is not damaged, simultaneously thoroughly avoids the emergence of the case of scraper damage, and, only need to install pre-coating roller structure on existing production line, glue supply system is not needed to be transformed, realize low difficulty, consumption cost is not high, and large viscosity range can be adapted, different working conditions under production demand can be satisfied. Further, temperature control module is arranged in pre-coating roller, can effectively reduce the influence of glue viscosity fluctuation on product processing quality.

Description

Technical Field

[0001] This utility model relates to the field of privacy film production, and in particular to a device for preventing dripping adhesive residue in privacy film production. Background Technology

[0002] A privacy screen protector is a specially designed screen shield that primarily uses optical technology to limit the viewing angle of the screen, ensuring that the screen content is only visible to the user directly in front, while remaining invisible to onlookers from the sides, thus protecting privacy. As a precision optical film, privacy screen protectors require the coating of micron-level optical structures (prism arrays, gratings, etc.) onto the substrate surface. Current mainstream processes use peristaltic pumps or pressure glue tanks to deliver adhesive (black / white glue) to the mold, but this method has the following problems: When the adhesive drips, abrupt changes in the tube diameter or surface tension can easily create trailing marks and radial glue residue, leading to optical structure distortion and severely affecting the quality of the privacy screen protector. Utility Model Content

[0003] This invention provides an anti-drip adhesive residue device for the production of privacy films, which can solve the problem in the prior art that when adhesive drips, it easily forms trailing marks and radial adhesive residues, leading to optical structure distortion.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] An anti-drip adhesive residue device for the production of privacy films, comprising:

[0006] Support frame;

[0007] A pre-coating roller is positioned above the rubber wheel and the mold wheel, with a gap between them. The pre-coating roller is rotatably mounted on the support frame.

[0008] A dispensing tube, wherein the dispensing outlet of the dispensing tube is located above the pre-coating roller and is spaced apart from the pre-coating roller;

[0009] A power source is provided to drive the pre-coated roller to rotate.

[0010] In one embodiment of this utility model: the support frame includes a fixed frame and an adapter seat, the pre-coating roller is rotatably mounted on the adapter seat, and a lifting drive mechanism is provided between the fixed frame and the adapter seat.

[0011] In one embodiment of this utility model: the pre-coating roller is made of 304 stainless steel and has an external chrome plating treatment.

[0012] In one embodiment of this utility model: the diameter of the pre-coating roller is 150mm and the length is 1200mm.

[0013] In one embodiment of this utility model: a heating component is provided inside the pre-coating roller, and a temperature sensor connected to a controller is provided inside the pre-coating roller.

[0014] In one embodiment of this utility model: a heating chamber is provided inside the pre-coating roller, and a connector is rotatably connected to the end of the pre-coating roller away from the power source, the connector being connected to a water supply assembly.

[0015] In one embodiment of this utility model: the surface of the pre-coating roller is provided with a spirally arranged drip groove.

[0016] In one embodiment of this utility model, the distance between the dispensing tube and the pre-coating roller is 5-10 mm.

[0017] In one embodiment of this utility model, the diameter of the dispensing nozzle of the dispensing tube is 0.5-1.5mm.

[0018] In one embodiment of this utility model, the dispensing tube and the dispensing tube are detachably connected.

[0019] The anti-drip adhesive residue device for the production of privacy films according to this utility model has at least one of the following technical effects:

[0020] This application provides an anti-drip adhesive residue device for the production of privacy films, including a pre-coating roller disposed above a rubber wheel and a mold wheel. An adhesive dripping tube drips adhesive onto the pre-coating roller, which then drips the adhesive onto the mold wheel, achieving zero-contact coating. This eliminates dripping residue without damaging the microstructure and completely avoids damage to the scraper. Furthermore, it only requires adding the pre-coating roller structure to an existing production line, without modifying the adhesive supply system, making it easy to implement, inexpensive, and adaptable to a wide viscosity range to meet production needs under different operating conditions. Additionally, a temperature control module is installed inside the pre-coating roller to effectively reduce the impact of adhesive viscosity fluctuations on product processing quality. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood in conjunction with the following description of the embodiments with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. Wherein:

[0022] Figure 1 This is a structural schematic diagram of the present invention from one perspective;

[0023] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0024] Figure 3This is a schematic diagram of the heating chamber on the pre-coating roller of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of an embodiment of the glue-dispensing groove on the pre-coating roller of this utility model;

[0026] Figure 5 This is a schematic diagram of another embodiment of the glue-dispensing groove on the pre-coating roller of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Pre-coating roller; 2. Rubber wheel; 3. Mold wheel; 4. Dispensing tube; 5. Support frame; 6. Power source; 7. Heating chamber; 8. Connector. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] Privacy films, as precision optical films, require the coating of micron-level optical structures (prism arrays, gratings, etc.) on the substrate surface. The current mainstream process involves using a peristaltic pump or pressure glue tank to deliver adhesive (black / white glue) to the mold via a dispensing tube. However, this method has the following problems: When the adhesive drips, abrupt changes in the tube diameter or surface tension can easily create trailing marks and radial glue residue, leading to optical structure distortion and severely affecting the quality of the privacy film. Furthermore, this method presents significant challenges in process control. To ensure the quality of the privacy film, precise control of the dispensing speed (±0.5ml / min) and height (±0.1mm) is required. However, in actual production, controlling the dispensing tube is difficult, making it challenging to consistently maintain dispensing accuracy.

[0031] Existing methods for eliminating glue drip marks include: using a scraper to correct the glue marks, optimizing the shape of the glue tube outlet (such as a conical design), and replacing the glue tube with a method of vacuum suction to apply the glue to the mold. However, in the above methods, the scraper directly contacts the uncured glue layer, which can cause microstructural scratches; changing the way the glue tube outlet is designed can only reduce some of the glue drip marks, not completely eliminate them, and different product types and operating conditions require different glue viscosities, which cannot be adapted to by changing the way the glue tube outlet is designed; using vacuum suction requires modifying the production line and adding a sealing system, which is difficult to implement and costly.

[0032] Therefore, this application provides an anti-drip adhesive mark device for the production of privacy films, including a pre-coating roller 1 disposed above a rubber wheel 2 and a mold wheel 3. An adhesive dripping tube 4 drips adhesive onto the pre-coating roller 1, and then the adhesive is dripped onto the mold wheel 3 through the pre-coating roller 1, achieving zero-contact coating. This eliminates drip marks without damaging the microstructure and completely avoids damage to the scraper. Furthermore, it only requires adding the pre-coating roller 1 structure to the existing production line, without modifying the adhesive supply system. This makes it easy to implement, inexpensive, and adaptable to a wide viscosity range, meeting production needs under different working conditions. Furthermore, a temperature control module is installed inside the pre-coating roller 1, which can effectively reduce the impact of adhesive viscosity fluctuations on product processing quality.

[0033] like Figures 1-5 As shown in the figure, the present invention provides a device for preventing dripping adhesive marks in the production of privacy films, including a support frame 5, a pre-coating roller 1, a dripping tube 4, a power source 6, etc.

[0034] Please see Figures 1-5 In one embodiment of this utility model, the pre-coating roller 1 is rotatably mounted on the support frame 5. Specifically, the roller shaft of the pre-coating roller 1 is rotatably mounted on the support frame 5. The pre-coating roller 1 is positioned above the rubber wheel 2 and the mold wheel 3, and is parallel to the mold wheel 3. Alternatively, it can be positioned above the mold wheel 3, with a gap between the pre-coating roller 1 and the mold wheel 3, enabling contactless dispensing and transfer of the adhesive onto the mold wheel 3. As an example, the pre-coating roller 1 can be made of 304 stainless steel, and its external chrome plating ensures hardness performance (HV≥800). As a specific example, the diameter of the pre-coating roller 1 can be 150mm, and its length can be 1200mm. The specifications and dimensions of the pre-coating roller 1 can be designed according to the actual product specifications.

[0035] Please see Figures 1-5 In one embodiment of this utility model, to ensure the uniformity of the glue dripping from the dispensing tube 4 onto the pre-coating roller 1 and then onto the mold wheel 3, the surface of the pre-coating roller 1 is engraved with spirally arranged dispensing grooves, allowing the glue to drip more evenly onto the mold for shaping. Furthermore, for a mold wheel 3 with a larger width, i.e., a larger length dimension along its axial direction, a bidirectional spiral groove (such as...) can be selected. Figure 5 The spiral grooves in different directions meet at the middle of the pre-coating roller 1, thereby ensuring the uniformity of the adhesive distribution.

[0036] Please see Figures 1-5In one embodiment of this utility model, the support frame 5 can be fixedly installed on the ground, wall column, or other structure to provide support and for installing various structural components. The support frame 5 may include a fixed frame and an adapter seat. The pre-coating roller 1 is rotatably mounted on the adapter seat, and a lifting drive mechanism is provided between the fixed frame and the adapter seat. The lifting drive mechanism can drive the adapter seat to move up and down, thereby adjusting the vertical position of the pre-coating roller 1 according to actual working conditions, and thus adjusting the gap between the pre-coating roller 1 and the mold wheel 3. The lifting drive mechanism can be a telescopic sleeve, a cylinder, a hydraulic cylinder, or other similar structure.

[0037] Please see Figures 1-5 In one embodiment of this utility model, the power source 6 is used to drive the pre-coating roller 1 to rotate. The power source 6 can be a servo motor fixedly connected to the rotating base. The output shaft of the motor can be connected to the roller shaft of the pre-coating roller 1 via a coupling, and is used to drive the pre-coating roller 1 to rotate. Its rotational speed range can be 8-50 rpm, with a control accuracy of ±0.1 rpm. In actual use, the rotational speed can be adjusted according to actual working conditions, such as the amount of adhesive dispensed.

[0038] Please see Figures 1-5 In one embodiment of this utility model, one end of the dispensing tube 4 is connected to the glue supply system, and the outlet of the other end is positioned above the pre-coating roller 1, spaced apart from it. The distance between the dispensing tube 4 and the pre-coating roller 1 can be 5-10mm. The dispensing tube 4 and the glue supply tube are detachably connected, such as by plug-in or threaded connection, so that dispensing tubes 4 with different sizes of outlets can be replaced according to actual use, such as different product specifications corresponding to different viscosities of glue. The outlet diameter of the dispensing tube 4 can be 0.5-1.5mm to adapt to different viscosities of glue. Furthermore, a linear drive component, such as a cylinder, can be provided on the support frame 5 to drive the dispensing tube 4 to reciprocate along the axial direction of the pre-coating roller 1, so that the glue is evenly distributed on the entire pre-coating roller 1.

[0039] Please see Figures 1-5In one embodiment of this utility model, a heating component may be provided inside the pre-coating roller 1, and a temperature sensor connected to a controller may be provided inside the pre-coating roller 1. The controller (such as a PLC industrial computer), the heating component, and the temperature sensor together form a temperature control module, which is used to ensure the temperature stability of the pre-coating roller 1, avoid viscosity fluctuations of the adhesive due to temperature fluctuations during the dispensing process, and thus ensure the stability of the adhesive supply. Specifically, the heating component may be an electric heating structure or a circulating water heating structure. As an example, a heating chamber 7 may be provided inside the pre-coating roller 1. The heating chamber 7 may be a spirally arranged heating chamber 7 or an annularly arranged heating chamber 7. Further, it may be multiple annular heating chambers 7 arranged internally and externally and connected. A connector 8 is rotatably connected to one end of the pre-coating roller 1 away from the power source 6. The connector 8 is rotatably inserted at the axial position of the pre-coating roller 1. The connector 8 may be provided with an inlet and an outlet communicating with the heating chamber 7. The other end of the connector 8 is connected to a water supply component. Hot water is circulated into the heating chamber 7 through connector 8, ensuring that the water in the heating chamber 7 is in a flowing state and guaranteeing temperature stability. The temperature of the circulated hot water can be between 30-80℃, and the specific temperature can be selected according to the actual working conditions. The temperature gradient of the roller surface is <±1℃.

[0040] The working principle of this utility model:

[0041] According to the actual product requirements, the temperature, rotation speed and glue flow rate of the pre-coating roller 1 are adjusted. By adjusting the roller speed to match the glue flow rate, the applicable viscosity range is expanded. The glue is dripped from the drip tube 4 onto the pre-coating roller 1 with spiral grooves, and then transferred to the mold for coating and forming. The rotating pre-coating roller 1 with spiral grooves can ensure that the glue is distributed more evenly and avoid the formation of drip marks during the delivery of glue to the mold.

[0042] The foregoing has provided a detailed description of one embodiment of the present invention, but the description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the scope of the claims of the present invention.

[0043] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 product of this utility model is in use. They are used only for the convenience of describing this utility model and for 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. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0044] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A device for preventing dripping adhesive residue in the production of privacy films, characterized in that, include: Support frame; A pre-coating roller is positioned above the rubber wheel and the mold wheel, with a gap between them. The pre-coating roller is rotatably mounted on the support frame. A dispensing tube, wherein the dispensing outlet of the dispensing tube is located above the pre-coating roller and is spaced apart from the pre-coating roller; A power source is provided to drive the pre-coated roller to rotate.

2. The device for preventing dripping adhesive residue in the production of privacy films according to claim 1, characterized in that, The support frame includes a fixed frame and an adapter seat. The pre-coating roller is rotatably mounted on the adapter seat, and a lifting drive mechanism is provided between the fixed frame and the adapter seat.

3. The device for preventing dripping adhesive residue in the production of privacy films according to claim 1, characterized in that, The pre-coating roller is made of 304 stainless steel and has an external chrome plating.

4. The device for preventing dripping adhesive residue in the production of privacy films according to claim 1, characterized in that, The pre-coating roller has a diameter of 150 mm and a length of 1200 mm.

5. The device for preventing dripping adhesive residue in the production of privacy films according to claim 1, characterized in that, The pre-coating roller is equipped with a heating component and a temperature sensor connected to the controller.

6. The device for preventing dripping adhesive residue in the production of privacy films according to claim 5, characterized in that, The pre-coating roller is provided with a heating chamber, and a connector is rotatably connected to the end of the pre-coating roller away from the power source. The connector is connected to the water supply component.

7. The device for preventing dripping adhesive residue in the production of privacy films according to claim 1, characterized in that, The surface of the pre-coating roller is provided with a spirally arranged drip groove.

8. The device for preventing dripping adhesive residue in the production of privacy films according to claim 1, characterized in that, The distance between the dispensing tube and the pre-coating roller is 5-10 mm.

9. The device for preventing dripping adhesive residue in the production of privacy films according to claim 1, characterized in that, The diameter of the dispensing nozzle of the dispensing tube is 0.5-1.5mm.

10. The device for preventing dripping adhesive residue in the production of privacy films according to claim 1, characterized in that, The dispensing tube and the glue supply tube are detachably connected.

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