A mesh roll coating glass apparatus

Abstract

This application relates to the field of glass surface treatment technology, specifically to a grid roller coating glass apparatus, comprising: a roller bar with a regular grid texture on its surface, the side length of which is 0.5mm-2mm; an ink storage tank disposed on the upper side of the roller bar and in contact with its surface; and a support frame with a lifting and adjusting component for adjusting the distance between the roller bar and the glass substrate. This application improves ink transfer rate through a composite structure of grid texture and micro-protrusions, while the size of the grid texture can be adjusted according to requirements to accommodate protective oils with different adhesion strengths, reducing the probability of oil dripping during the process.

Description

Technical Field

[0001] This application relates to the field of glass surface treatment technology, specifically to a grid roller coating glass apparatus, which is particularly suitable for automated production scenarios where ink or protective coating is uniformly applied to the surface of a glass substrate. Background Technology

[0002] The raw materials for the front and back covers of mobile phones are currently bare glass. During the manufacturing process, protective oil needs to be applied to prevent scratches. Existing roller coating methods typically use a roller-pressing technique for this purpose. Roller-pressing equipment transports the product via a conveyor belt, and the protective oil is evenly applied to the glass by pressure rollers. While the roller surfaces are initially smooth, after prolonged use, glass fragments can cause deep scratches on the product, resulting in uneven printing of the protective oil in subsequent applications. Some areas may have inconsistent thickness, or even no protective oil at all, severely affecting ink adhesion and compromising the protection of the raw material. Furthermore, it has poor adaptability to high-viscosity inks, easily producing streaky, uneven coating. Utility Model Content

[0003] This application provides a grid roller coating glass apparatus to overcome the uneven ink coating caused by long-term use of existing roller coating equipment, which affects the adhesion of the protective oil during the manufacturing process, thereby improving the yield of mobile phone glass front and back covers.

[0004] To achieve the above objectives, this application provides a grid roll coating glass apparatus, comprising:

[0005] Roller bar, the surface of the roller bar is provided with a regular mesh texture, the side length of the mesh texture is 0.5mm-2mm;

[0006] An ink storage tank is located above and to the side of the roller bar and in contact with the surface of the roller bar;

[0007] The support frame is equipped with a lifting and adjusting component for adjusting the distance between the roller and the glass substrate.

[0008] In one feasible embodiment, the mesh texture is formed by an etching process, and a hard coating with a thickness of 10-50 μm is plated on the etched surface. The coating material is selected from chromium, tungsten carbide or diamond-like carbon coating.

[0009] In one feasible embodiment, the mesh texture is a square texture with a mesh area of ​​0.25 mm. 2 ~4mm 2 .

[0010] In one feasible embodiment, a collection trough is also included, located directly below the roller bar, for catching dripping residual ink.

[0011] In one feasible embodiment, the lifting adjustment assembly includes: a threaded rod connected to the support frame via a bearing; and an infrared ranging sensor fixed to both ends of the roller rod for real-time detection of the distance between the roller rod and the glass substrate.

[0012] A servo motor is used to drive the threaded rod for dynamic compensation adjustment.

[0013] In one feasible embodiment, the mesh of the mesh texture has raised structures inside the mesh openings, and the spacing between adjacent raised structures is 1 / 5 to 1 / 3 of the side length of the mesh texture.

[0014] This application improves ink transfer rate through a composite structure of mesh texture and micro-protrusion. At the same time, the size of the mesh texture can be adjusted according to needs to adapt to protective oils with different adhesion. That is, they are combined to achieve the maximum adhesion effect and reduce the probability of oil falling off during the process. The texture size can be adjusted during the processing of the screen roller, and subsequent use only requires replacement without multiple disassembly / processing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a grid roller coating glass apparatus provided in one embodiment of this application;

[0017] Figure 2 This application provides a schematic diagram of the roller structure of a grid roller coating glass apparatus according to one embodiment.

[0018] 1-Roller bar; 11-Regular mesh texture; 2-Ink storage tank; 3-Support frame; 4-Collection tank. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0021] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0022] The following is combined Figure 1 and Figure 2 This application describes a grid roller coating glass apparatus provided in its embodiments.

[0023] like Figure 1 and Figure 2 As shown, this embodiment provides a grid roller coating glass apparatus, comprising:

[0024] Roller bar 1 includes a base material and a texture structure.

[0025] The base material is made of 45# steel forged base, which is heat treated to ensure mechanical strength (yield strength ≥785MPa) and the surface is nitrided and hardened (hardness ≥800HV) to improve wear resistance.

[0026] Texture structure:

[0027] A 1×1mm square grid (tolerance ±0.02mm) is etched on the roller surface using a fiber laser, with a mesh depth of 0.3mm. The processing parameters are 200W laser power and 500mm / s scanning speed, to form a precise ink storage cavity.

[0028] The inner wall of the mesh is innovatively designed with a conical micro-protrusion structure with a protrusion height of 12μm±2μm, a cone angle of 45°±5°, and a spacing of 0.4mm between adjacent protrusions. Fluid dynamics simulation has verified that it can effectively pierce the gas adsorption layer on the glass surface and improve the wettability of ink.

[0029] Surface coating: Electroplated 40μm thick dense hard chrome layer (Vickers hardness 1200HV), surface roughness Ra=0.4-0.6μm, combining wear resistance and ink release characteristics.

[0030] Ink storage tank 2: Inclined at 35° to contact the roller pressure bar, with a flow rate control of 5-50mL / min achieved by a metering pump;

[0031] Support frame 3 includes a conveyor belt and a lifting and adjusting assembly:

[0032] The conveyor belt is made of polyurethane. The lifting and adjusting components use a high-precision ball screw with a lead of 5mm, matched with a planetary reducer, to achieve a gap adjustment of 0.01mm, meeting the requirements of ultra-thin glass coating process. It integrates a laser triangulation infrared distance sensor to monitor the position of the roller in real time at a frequency of 1kHz, with a measurement accuracy of ±0.005mm. After receiving the sensor signal, the servo motor performs dynamic compensation through a PID control algorithm to ensure that the roller gap is stable within the set value of ±0.01mm.

[0033] Collection slot 4:

[0034] The inner wall of the 304 stainless steel tank is coated with PTFE. The tank is tilted at 5° and, together with an ultrasonic transducer, achieves efficient self-flowing and anti-adhesion of ink.

[0035] During the production process, simply place large, uncut pieces of raw glass on the conveyor belt. As the equipment starts up, the rollers continuously rotate and press, automatically printing the protective oil onto the glass in the form of a texture.

[0036] The working process of the grid roller coating glass apparatus provided in this application will be described below in order to better understand the technical solution provided in this application.

[0037] Example 1: Basic type of grid roller coating device

[0038] The roller bar surface is laser-etched to form a uniform square grid, with each grid having a side length of 1.2 mm and a mesh area of ​​1.44 square millimeters. The roller bar surface is covered with a 30-micron-thick hard chrome plating layer, which is not only hard and wear-resistant but also has excellent corrosion resistance, with a surface roughness controlled within 0.5 microns. The ink storage tank is made of stainless steel, and the ink outlet contacts the roller bar at a 35-degree angle. A precision metering pump allows for ink flow rate adjustment from 5 to 50 ml per minute. The support frame incorporates a high-precision lifting component, using a ball screw and servo motor linkage, along with an infrared distance sensor to monitor the distance between the roller bar and the glass substrate in real time, achieving an adjustment accuracy of 0.02 mm.

[0039] During operation, a 3 mm thick glass substrate passes through the rolling zone at a uniform speed of 1.2 meters per second. The distance between the rolling rod and the glass is adjusted to 0.8 mm, and the ink viscosity is set to 600 centipoise. Actual testing shows that the standard deviation of the coating thickness uniformity is only 0.35 micrometers, fully meeting industrial standard requirements.

[0040] Example 2: High-efficiency ink recovery device

[0041] An inclined collection tank is added to the basic unit, with a Teflon coating on the tank surface and a three-stage filtration system connected to the bottom for efficient recovery of dripping residual ink. The ink recovery rate exceeds 92%, and the residual solids content of the recovered ink is less than 0.08%. The lifting adjustment component is upgraded to a combination of a high-response servo motor and a planetary reducer, reducing the adjustment response time to less than 0.3 seconds. Simultaneously, a pressure sensor is integrated to monitor the roller pressure in real time, enabling dynamic compensation adjustment.

[0042] Compared with traditional equipment, this design significantly increases ink utilization from 68% to 94.5%, and extends the equipment cleaning cycle from once every 8 hours to once every 24 hours, thus significantly improving production efficiency.

[0043] Example 3: Microstructure-enhanced roller coating apparatus

[0044] The roller press bar incorporates tapered micro-protrusions within its grid, with a protrusion height of 15 micrometers and a bottom diameter of 20 micrometers. The spacing between adjacent protrusions is one-quarter of the grid's side length. The protrusion tops feature micrometer-level rounded corners, effectively reducing stress concentration. The roller press bar surface undergoes a composite coating process, first depositing a nickel-phosphorus alloy underlayer and then covering it with a diamond-like carbon coating, significantly improving wear resistance and lubricity.

[0045] In the above embodiments, the mesh roller coating glass device provided in this application is designed for high viscosity inks. The texture size can be adjusted according to the requirements to adapt to protective oils with different adhesion, that is, to achieve the maximum adhesion effect by combining them, reducing the probability of oil falling off during the process. The texture size can be adjusted during mesh roller processing.

[0046] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A grid roller coating glass apparatus, characterized in that, include: Roller bar (1), the surface of the roller bar (1) is provided with a regular mesh texture (11), the side length of the mesh texture is 0.5mm-2mm; An ink storage tank (2) is disposed above the side of the roller (1) and in contact with the surface of the roller (1); The support frame (3) is provided with a lifting adjustment component for adjusting the distance between the roller (1) and the glass substrate.

2. The grid roll coating glass apparatus as described in claim 1, characterized in that, The mesh texture is formed by an etching process, and a hard coating with a thickness of 10-50 μm is plated on the etched surface. The coating material is selected from chromium, tungsten carbide or diamond-like coating.

3. The grid roll coating glass apparatus as described in claim 1 or 2, characterized in that, The mesh texture is a square texture with a mesh area of ​​0.25 mm. 2 ~4mm 2 .

4. The grid roller coating glass apparatus as described in claim 1, characterized in that, It also includes a collection tank (4), which is located directly below the roller (1) and is used to collect dripping residual ink.

5. The grid roll coating glass apparatus as described in claim 1, characterized in that, The lifting adjustment component includes: The threaded rod is connected to the support frame (3) via a bearing; An infrared ranging sensor is fixed at both ends of the roller (1) to detect the distance between the roller (1) and the glass substrate in real time. A servo motor is used to drive the threaded rod for dynamic compensation adjustment.

6. The grid roll coating glass apparatus as described in claim 5, characterized in that, The mesh of the mesh texture has raised structures inside the mesh openings, and the spacing between adjacent raised structures is 1 / 5 to 1 / 3 of the side length of the mesh texture.

Images