Roll coating method

Abstract

The invention discloses a roll-in coating method, and belongs to the technical field of roll-in. The roll-in coating method comprises the following steps: S1, transferring a glass lining plate to a bearing platform with vacuum adsorption holes; s2, starting vacuumizing equipment to enable the vacuum adsorption holes to adsorb and position the glass lining plate; s3, the warping degree of the glass lining plate is obtained, wherein the warping degree is the distance between the lower surface of the glass lining plate and the bearing platform; s4, whether the warping degree exceeds a preset over-limit value or not is judged, if yes, an alarm is given, and the information of the glass lining plate is recorded; if not, entering the next step; s5, dispensing the glass cover plate on the glass lining plate and attaching a release film; and S6, the downward moving unit automatically adjusts the downward pressing amount of the two sides of the rolling shaft according to the warping degree and conducts rolling coating. According to the invention, the product film thickness yield is improved, and the coating efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of roll forming technology, and more particularly to a roll forming coating method. Background Technology

[0002] The current coating process for ultra-thin flexible glass covers includes the following steps: 1. A glass cover is placed on the blue film of a glass backing; 2. A dispensing head pre-applies coating liquid to the edge of the glass cover according to a preset trajectory, followed by the application of a release film. A roller press is then used to uniformly roll the release film to coat the flexible glass cover; 3. High-temperature baking is performed to cure the coating liquid. Finally, the glass cover is peeled off from the glass backing, and the glass backing is then used for the coating of the next glass cover. The glass backing can be reused multiple times, improving its utilization rate.

[0003] However, because the glass backing is prone to warping and deformation after being baked at high temperatures multiple times, when the glass backing enters the coating process of the next glass cover, it is easy to cause significant differences in the film thickness formed by the coating liquid on the glass cover, resulting in a decrease in product yield. In addition, warping during the rolling process will cause excess coating liquid to be squeezed out of the release film, resulting in excess coating liquid sticking to the rolling shaft.

[0004] Therefore, there is an urgent need to provide a roll coating method to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a roll coating method that improves the yield of product film thickness and increases coating efficiency.

[0006] To achieve the above objectives, the following technical solution is provided:

[0007] A roll coating method, characterized by comprising the following steps:

[0008] S1. Transfer the glass backing plate to the support platform with vacuum adsorption holes;

[0009] S2. Turn on the vacuum equipment to allow the vacuum adsorption hole to adsorb and position the glass backing plate.

[0010] S3. Obtain the warpage of the glass backing plate, wherein the warpage is the distance between the lower surface of the glass backing plate and the supporting platform;

[0011] S4. Determine whether the warpage exceeds the preset limit. If yes, issue an alarm and record the glass liner information; otherwise, proceed to the next step.

[0012] S5. Apply adhesive to the glass cover plate on the glass backing and attach a release film.

[0013] S6. The lowering unit automatically adjusts the downward pressure on both sides of the roller shaft according to the warpage and performs roller coating.

[0014] As an alternative to the roll coating method, in step S1, the position of the glass backing plate on the support platform is corrected by a clamping mechanism.

[0015] As an alternative to the roll coating method, in step S2, the vacuuming equipment includes a vacuum generator and / or a vacuum pump.

[0016] As an alternative to the roll coating method, a ranging probe at a preset height is set on the support platform in step S3:

[0017] The distance from the upper surface of the attached material on the glass backing to the measuring probe is measured using the measuring probe. The warpage of the glass backing is obtained based on the preset height, the measuring distance, and the total thickness of the glass backing and its attached material.

[0018] As an alternative to the roll coating method, two ranging probes are set on the bearing platform to detect both sides of the glass backing and obtain a first warpage value and a second warpage value, respectively.

[0019] As an alternative to the roll coating method, the auxiliary materials include a blue film and a glass cover.

[0020] As an optional solution for the roll coating method, the lowering unit includes a mounting frame, a first lowering module, and a second lowering module. The first lowering module and the second lowering module are respectively disposed on both sides of the mounting frame. The roll shaft is rotatably disposed between the first lowering module and the second lowering module. The first lowering module is preset with a first preset lowering amount, and the second lowering module is preset with a second preset lowering amount.

[0021] As an optional solution for the roll coating method, the actual pressing amount of the first downward moving module is the difference between the first preset pressing amount and the first warpage value, and the actual pressing amount of the second downward moving module is the difference between the second preset pressing amount and the second warpage value.

[0022] As an alternative to the roll coating method, the carrier platform can move along the conveying direction.

[0023] As an alternative to the roll coating method, the roll coating method further includes the following steps:

[0024] S7. Curing with UV lamp irradiation or high temperature.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] The roller coating method provided by this invention involves transferring a glass backing plate to a support platform with vacuum adsorption holes; activating a vacuum pump to position the glass backing plate using the vacuum adsorption holes; obtaining the warpage of the glass backing plate, which is the distance between the lower surface of the glass backing plate and the support platform; determining whether the warpage exceeds a preset limit; if so, triggering an alarm and recording the glass backing plate information; otherwise, proceeding to the next step; applying adhesive to the glass cover plate on the glass backing plate and attaching a release film; and having a lowering unit automatically adjust the downward pressure on both sides of the roller shaft according to the warpage and perform roller coating. For the upper part of the glass backing plate, the lowering unit increases the height of the roller shaft according to the warpage; for the lower part of the glass backing plate, by setting vacuum adsorption holes on the platform surface, not only can the glass backing plate be stably positioned, but the adsorption of the glass backing plate by the vacuum adsorption holes can also effectively reduce the warpage of the glass backing plate edges. This roll coating method can mitigate and improve the impact of glass warping on roll coating thickness, thereby increasing the product film thickness yield; it also prevents excess coating liquid from sticking to the roll shaft, thus improving coating efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the roll coating method in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the stacked foldable flexible glass cover plate in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of a planar flexible glass cover plate stack in an embodiment of the present invention.

[0031] Figure label:

[0032] 1. Glass backing plate; 2. Blue film; 3. Glass cover plate; 4. Coating liquid; 5. Release film. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] In the description of this invention, 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 invention is in use. They are used only for the convenience of describing the invention 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 the invention. 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 invention, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this invention, 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 invention based on the specific circumstances.

[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] To improve product film thickness yield and coating efficiency, this embodiment provides a roll coating method for producing coating films for ultra-thin flexible glass covers. The following describes the method in conjunction with... Figures 1 to 3 The specific content of this embodiment will be described in detail.

[0038] In this embodiment, the roll coating method includes the following steps: S1, transferring the glass backing plate 1 to a support platform with vacuum adsorption holes; S2, turning on the vacuum equipment to allow the vacuum adsorption holes to adsorb and position the glass backing plate 1; S3, obtaining the warpage of the glass backing plate 1, where the warpage is the distance between the lower surface of the glass backing plate 1 and the support platform; S4, determining whether the warpage exceeds a preset limit value. If so, an alarm is triggered and the information of the glass backing plate 1 is recorded; otherwise, proceeding to the next step; S5, applying adhesive to the glass cover plate 3 on the glass backing plate 1 and attaching the release film 5; S6, the lowering unit automatically adjusts the downward pressure on both sides of the roll roller shaft according to the warpage and performs roll coating.

[0039] In summary, the roll coating method provided by this invention involves transferring a glass backing plate 1 to a support platform with vacuum adsorption holes; activating a vacuum pump to position the glass backing plate 1 using the vacuum adsorption holes; obtaining the warpage of the glass backing plate 1, where warpage is the distance between the lower surface of the glass backing plate 1 and the support platform; determining whether the warpage exceeds a preset limit value; if so, triggering an alarm and recording the information of the glass backing plate 1; otherwise, proceeding to the next step; applying adhesive to the glass cover plate 3 on the glass backing plate 1 and attaching a release film 5; and having the lowering unit automatically adjust the downward pressure on both sides of the roll roller shaft according to the warpage and perform roll coating. For the upper part of the glass backing plate 1, the lowering unit increases the height of the roll roller shaft according to the warpage; for the lower part of the glass backing plate 1, by setting vacuum adsorption holes on the platform surface, not only can the glass backing plate 1 be stably positioned, but the adsorption of the glass backing plate 1 by the vacuum adsorption holes can also effectively reduce the warpage of the edges of the glass backing plate 1. This roll coating method can mitigate and improve the impact of glass warping on roll coating thickness, thereby increasing the product film thickness yield; it also prevents excess coating liquid from sticking to the roll shaft, thus improving coating efficiency.

[0040] Further, in step S1, the position of the glass liner 1 on the support platform is corrected by a clamping mechanism. The clamping mechanism can be driven by, but is not limited to, a cylinder or an electric push rod, so that the glass liner 1 is placed on the upper surface of the support platform. For example, the support platform is a marble platform, and multiple vacuum adsorption holes are formed on the marble platform. The multiple vacuum adsorption holes are connected to a vacuum pumping device through pipelines. The number and arrangement of the multiple vacuum adsorption holes can be designed according to the actual use, and no further restrictions are imposed here.

[0041] Furthermore, in step S2, the vacuuming equipment includes a vacuum generator and / or a vacuum pump. The vacuum generator and vacuum pump enable effective adsorption of the glass substrate 1 on the support platform by the vacuum adsorption holes. Moreover, by using both the vacuum generator and vacuum pump to evacuate multiple vacuum adsorption holes, the adsorption force of the vacuum adsorption holes on the glass substrate 1 can be increased.

[0042] Furthermore, a ranging probe at a preset height is installed on the support platform. In step S3: the ranging probe is used to measure the distance from the upper surface of the adjunct material on the glass backing plate 1 to the ranging probe. The warpage of the glass backing plate 1 is obtained based on the preset height, the measurement distance, and the total thickness of the glass backing plate 1 and its adjunct material. Specifically, the warpage of the glass backing plate 1 is equal to the preset height minus the difference between the measurement distance and the total thickness of the glass backing plate 1 and its adjunct material. Specifically, the adjunct material on the glass backing plate 1 includes the blue film 2 and the glass cover plate 3.

[0043] For example, the ranging probe can be, but is not limited to, a laser detection probe. The working principle of the high-precision CL-P030 and above laser detection probes is to use white light as the measurement medium. White light will form a dispersion effect under a special lens group. Different depths of the measured object will reflect different colors of light. The light source is perpendicular to the measured object, and the reflected light is also perpendicular to the probe. The mirror surface can reflect the light spot to the maximum extent, thereby measuring the distance from the ranging probe to the surface of the measured object.

[0044] Furthermore, two ranging probes are installed on the support platform, located on both sides of the glass backing plate 1, to detect both sides of the glass backing plate 1 and obtain a first warpage value and a second warpage value. In this embodiment, the support platform can move along the conveying direction, thereby enabling the two ranging probes to detect different positions on both sides of the glass backing plate 1. The ranging probes are located in front of the lowering unit. First, the warpage of the glass backing plate 1 is obtained through the ranging probes, and then the lowering unit adjusts the downward pressure on both sides of the roller shaft according to the warpage.

[0045] Furthermore, the lowering unit includes a mounting frame, a first lowering module, and a second lowering module. The first and second lowering modules are respectively disposed on both sides of the mounting frame, and a roller shaft is rotatably disposed between the first and second lowering modules. The first lowering module has a preset first preset downward pressure amount, and the second lowering module has a preset second preset downward pressure amount. When the glass backing plate 1 is not warped, the first preset downward pressure amount and the second preset downward pressure amount are the corresponding lowering distances of the first and second lowering modules, respectively.

[0046] Optionally, the mounting bracket is mounted on the third downward moving module, which is capable of moving the mounting bracket, the first downward moving module, and the second downward moving module vertically as a whole.

[0047] Specifically, the actual downward pressure of the first downward moving module is the difference between the first preset downward pressure and the first warpage value, and the actual downward pressure of the second downward moving module is the difference between the second preset downward pressure and the second warpage value. Raising the corresponding downward moving module at the location where the glass backing 1 warps, and reducing the downward pressure of the corresponding downward moving module, can mitigate and improve the impact of glass warping on the roll film thickness, prevent excess coating liquid 4 from adhering to the roll shaft, and improve coating efficiency.

[0048] Furthermore, the roll coating method also includes the following step: S7, UV lamp irradiation curing or high-temperature curing. UV lamp irradiation curing or high-temperature curing can rapidly cure the coating liquid 4 and form a film layer of a set thickness.

[0049] In summary, this embodiment provides a roll coating method to improve abnormal warping of the glass backing plate 1. By setting vacuum adsorption holes on the marble countertop and arranging laser detection probes at the positions of the glass backing plates 1 on both sides, the warping degree of the glass backing plate 1 at different positions is automatically calculated by measuring the distance and the actual thickness of the glass backing plate 1 and the surface-adhered substances (blue film 2 and glass cover plate 3). This can reduce the degree of edge warping of the glass backing plate 1 and increase the roll coating height at the warped position to mitigate the impact of glass warping on the roll coating film thickness.

[0050] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A roll coating method, characterized in that, Includes the following steps: S1. Transfer the glass backing plate (1) to the support platform with vacuum adsorption holes; S2. Turn on the vacuum equipment to allow the vacuum adsorption hole to adsorb and position the glass liner (1); S3. Obtain the warpage of the glass backing plate (1), wherein the warpage is the distance between the lower surface of the glass backing plate (1) and the bearing platform; S4. Determine whether the warpage exceeds the preset limit. If yes, an alarm is triggered and the information of the glass liner (1) is recorded. If no, proceed to the next step. S5. Apply adhesive to the glass cover plate (3) on the glass backing plate (1) and attach the release film (5); S6. The lowering unit automatically adjusts the downward pressure on both sides of the roller shaft according to the warpage and performs roller coating.

2. The roll coating method according to claim 1, characterized in that, In step S1, the position of the glass backing plate (1) on the support platform is corrected by a clamping mechanism.

3. The roll coating method according to claim 1, characterized in that, In step S2, the vacuuming equipment includes a vacuum generator and / or a vacuum pump.

4. The roll coating method according to claim 1, characterized in that, A ranging probe at a preset height is installed on the support platform. In step S3: The distance from the upper surface of the attached material on the glass liner (1) to the measuring probe is measured using the measuring probe. The warpage of the glass liner (1) is obtained based on the preset height, the measuring distance, and the total thickness of the glass liner (1) and its attached material.

5. The roll coating method according to claim 4, characterized in that, Two ranging probes are set on the bearing platform to detect the two sides of the glass backing plate (1) respectively and obtain the first warping value and the second warping value.

6. The roll coating method according to claim 4, characterized in that, The auxiliary materials include a blue film (2) and a glass cover plate (3).

7. The roll coating method according to claim 5, characterized in that, The lowering unit includes a mounting frame, a first lowering module, and a second lowering module. The first lowering module and the second lowering module are respectively disposed on both sides of the mounting frame. The roller shaft is rotatably disposed between the first lowering module and the second lowering module. The first lowering module is preset with a first preset lowering amount, and the second lowering module is preset with a second preset lowering amount.

8. The roll coating method according to claim 7, characterized in that, The actual downward pressure of the first downward module is the difference between the first preset downward pressure and the first warpage value, and the actual downward pressure of the second downward module is the difference between the second preset downward pressure and the second warpage value.

9. The roll coating method according to claim 1, characterized in that, The carrying platform is capable of moving along the conveying direction.

10. The roll coating method according to any one of claims 1-9, characterized in that, The roll coating method further includes the following steps: S7. Curing with UV lamp irradiation or high temperature.

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