Automatic spraying machine for glass cover plate and spraying and drying method thereof

Abstract

The present invention discloses an automatic spraying machine for glass cover plates and a spraying and drying method thereof, and relates to the field of automatic spraying technology; the spraying machine comprises a spraying machine frame, a double-shaft motor fixed at the bottom of both sides of the spraying machine frame, and a conveyor belt arranged at the bottom of the spraying machine frame, the top outer wall of the spraying machine frame is fixedly connected to two liquid storage tanks, a cleaning liquid is placed inside the front liquid storage tank, and a protective oil is placed inside the rear liquid storage tank, and nozzles are extended at the bottom of the two liquid storage tanks, and also comprises a plurality of transmission mechanisms, the transmission mechanism comprises a vertically arranged transmission roller, which is used for limiting the transmission of the vertically arranged glass cover plates; two smoothing mechanisms, the smoothing mechanism comprises a horizontally arranged smoothing roller that moves up and down, which is used for smoothing the protective oil on the surface of the glass cover plates; and two cleaning mechanisms. In the present invention, the transmission roller is arranged vertically, so that the glass cover plates are vertically transmitted on the conveyor belt, thereby improving the spraying efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of automatic spraying, and in particular to an automatic spraying machine for a glass cover plate and a spraying and drying method thereof. Background Art

[0002] The glass cover of a mobile phone is the upper glass on the touch screen. When using the glass cover to produce the mobile phone cover, it is first necessary to spray the glass cover with protective oil to temporarily protect the surface from scratches and dirt during glass cutting and CNC. At present, in the prior art, the automatic sprayer for the glass cover can only spray protective oil on one side of the glass cover at a time, and it takes two sprays to complete the spraying operation for a glass cover. At the same time, in order to make the protective oil fully cover the glass cover during the spraying process, the sprayer needs to spray the entire glass cover, which wastes a lot of protective oil and the spraying is uneven.

[0003] After searching, the Chinese patent application number CN201911389767.7 discloses a method for spraying protective oil on a glass cover plate. The specific process is as follows: tear off the protective film on one side of the original glass cover plate before cutting, place the side with the torn protective film facing up on the conveying roller of the spray machine, and spray protective oil on the surface of the glass cover plate. The spraying speed is 1400mm / s-1600mm / s; the spraying thickness range is 5μm-8μm; the spraying flow rate is set to 1450g / s-155g / s, and the spraying flow rate refers to the amount of protective oil sprayed onto the glass cover plate by the spray machine per second; the feed speed is set to 100mm / s, and the feed speed refers to the speed at which the main shaft of the spray machine transports the glass cover plate; the spraying height is set to 6mm-8mm, and the spraying height refers to the distance between the spray gun and the glass cover plate.

[0004] The method of spraying protective oil on the glass cover plate in the above patent cannot save protective oil, which increases the production cost. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an automatic spraying machine for a glass cover plate and a spraying and drying method thereof.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An automatic spraying machine for glass cover plates, comprising a spraying machine frame, a double-axis motor fixed to the bottom of both sides of the spraying machine frame, and a conveyor belt arranged at the bottom of the spraying machine frame, wherein the top outer wall of the spraying machine frame is fixedly connected to two liquid storage tanks, a cleaning liquid is placed in the front liquid storage tank, and a protective oil is placed in the rear liquid storage tank, and nozzles extend from the bottom of the two liquid storage tanks, and also comprises a plurality of transmission mechanisms, wherein the transmission mechanism comprises a vertically arranged transmission roller for limiting the transmission of the vertically arranged glass cover plates; two smoothing mechanisms, wherein the smoothing mechanisms comprise a horizontally arranged smoothing roller that moves up and down and is used to smooth the protective oil on the surface of the glass cover plates; and two cleaning mechanisms, wherein the cleaning mechanisms comprise a recyclable annular cleaning sponge for cleaning stains on the surface of the glass cover plates.

[0008] Preferably: the transmission mechanism also includes a transmission connecting rod fixedly connected to one side of the spray machine frame, the middle inner wall of the transmission connecting rod is fixedly connected to a transmission telescopic column, the telescopic end of the transmission telescopic column is fixedly connected to a transmission gantry, the upper and lower ends of the transmission gantry are rotatably connected to movable wheels, and the outer walls on both sides of the transmission roller are rotatably connected to the inner walls on the opposite sides of the transmission gantry.

[0009] Preferably, the transmission gantry is fixedly connected to two supporting connecting rods at the upper and lower ends on the same side, two supporting connecting rods are fixedly connected between the two supporting connecting rods, and the outer walls around the supporting connecting columns are fixedly connected to limiting connecting rods.

[0010] Preferably: the smoothing mechanism also includes a rotating disk connected to an output shaft of the dual-axis motor through a coupling, and the other end of the rotating disk is rotatably connected to a rotating connecting column; the smoothing mechanism also includes a translation connecting rod, and the inner wall of one end of the translation connecting rod is processed with a sliding connecting groove, and the rotating connecting column is slidably connected to the inner wall of the sliding connecting groove on all sides, and the outer wall of one side of the translation connecting rod is fixedly connected to a smoothing gantry, and the two sides of the smoothing roller are rotatably connected to the inner walls of the two opposite sides of the smoothing gantry.

[0011] As a preferred embodiment of the present invention: limiting cylinders are fixedly connected to the bottom of both sides of the spray machine frame, circular grooves are machined inside the limiting cylinders, and a directional connecting rod is fixedly connected to the outer wall of the bottom end of the translation connecting rod, and the outer walls around the directional connecting rod are slidably connected to the inner wall of the circular groove of the limiting cylinder.

[0012] As a further preferred embodiment of the present invention: the translation link is slidably connected between the two limit links, and the length of the smoothing gantry is greater than the distance between the two supporting connecting columns.

[0013] As a further preferred embodiment of the present invention: the cleaning mechanism also includes a load-bearing circular plate connected to the other output shaft of the dual-axis motor through a coupling, the load-bearing circular plate is processed with evenly distributed circular grooves around it, the inner wall of the circular groove of the load-bearing circular plate is fixedly connected to a telescopic spring, the outer end of the telescopic spring is fixedly connected to a telescopic connecting column, the outer end of the telescopic connecting column is fixedly connected to an extension connecting rod, one end of the extension connecting rod is fixedly connected to a cleaning load-bearing block, and the annular cleaning sponge is fixedly connected to multiple cleaning load-bearing blocks.

[0014] As a further preferred embodiment of the present invention: the extension link is slidably connected between the two limiting links, the width of the cleaning bearing block is greater than the distance between the two limiting links, and the width of the cleaning bearing block is less than the distance between the two supporting connecting columns.

[0015] A spraying and drying method of an automatic spraying machine for a glass cover plate specifically comprises the following steps:

[0016] S1: The staff places the glass cover plate vertically on the conveyor belt and transmits it under the limit of the transmission mechanism;

[0017] S2: The glass cover plate moves to a liquid storage tank containing cleaning liquid, and the liquid storage tank sprays cleaning liquid to both sides of the glass cover plate, and then the glass cover plate is cleaned by a circular cleaning sponge of the cleaning mechanism;

[0018] S3: The cleaned glass cover plate is moved to a liquid storage tank containing protective oil, and the liquid storage tank sprays protective oil on both sides of the glass cover plate, and then the protective oil on the glass cover plate is evenly spread by a spreading roller of a spreading mechanism;

[0019] S4: The evenly spread glass cover plate enters a drying box under the transmission of a conveyor belt and is dried in the drying box at a temperature of 85°C;

[0020] S5: The staff takes out the dried glass cover.

[0021] The beneficial effects of the present invention are:

[0022] 1. The transmission roller is arranged vertically, so that the glass cover plate is transmitted vertically on the conveyor belt. The transmission roller limits the glass cover plate while transmitting the glass cover plate, so that the glass cover plate can be smoothly transmitted vertically. Then, protective oil can be sprayed on both sides of the glass cover plate through the nozzle of the liquid storage tank at the same time to improve the spraying efficiency.

[0023] 2. The spreading roller is placed horizontally to facilitate spreading the protective oil on the glass cover. The rotation of the rotating disc changes the height of the rotating connecting column on the rotating disc, thereby pushing the translation connecting rod to move up and down, and then causing the spreading roller to move up and down to spread the protective oil on the surface of the glass cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an automatic spraying machine for a glass cover plate proposed by the present invention;

[0025] Figure 2 It is a schematic diagram of the supporting connecting rod of an automatic spraying machine for a glass cover plate proposed by the present invention;

[0026] Figure 3 It is a schematic diagram of the transmission mechanism of an automatic spraying machine for a glass cover plate proposed by the present invention;

[0027] Figure 4 It is a schematic diagram of the dual-axis motor of an automatic spraying machine for a glass cover plate proposed by the present invention;

[0028] Figure 5 It is a schematic diagram of the cross-sectional shape of a cleaning mechanism of an automatic spraying machine for a glass cover plate proposed by the present invention;

[0029] Figure 6 The present invention is a schematic diagram of a smoothing mechanism of an automatic spraying machine for a glass cover plate.

[0030] In the figure: 1-spraying machine frame, 2-liquid storage tank, 3-transmission mechanism, 301-transmission connecting rod, 302-transmission telescopic column, 303-transmission gantry, 304-moving wheel, 305-transmission roller, 4-cleaning mechanism, 401-bearing circular plate, 402-telescopic connecting column, 403-extension connecting rod, 404-telescopic spring, 405-annular cleaning sponge, 406-cleaning bearing block, 5-dual-axis motor, 6-smoothing mechanism, 601-rotating disc, 602-translational connecting rod, 603-sliding connecting groove, 604-rotating connecting column, 605-directional connecting rod, 606-limiting cylinder, 607-smoothing roller, 608-smoothing gantry, 7-conveyor belt, 8-support connecting rod, 9-support connecting column, 10-limiting connecting rod. DETAILED DESCRIPTION

[0031] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not limit the referred device, structure or element to have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limitations on this patent.

[0034] Embodiment 1:

[0035] An automatic spraying machine for glass cover, see attached Figure 1 , Figure 3 As shown, it includes a spraying machine frame 1 and a conveyor belt 7 arranged at the bottom of the spraying machine frame 1. The top outer wall of the spraying machine frame 1 is fixedly connected to two liquid storage tanks 2. Cleaning liquid is placed in the front liquid storage tank 2, and protective oil is placed in the rear liquid storage tank 2. Spouts are extended from the bottom of the two liquid storage tanks 2. Two transmission mechanisms 3 are fixedly connected on both sides of the spraying machine frame 1. The transmission mechanism 3 includes a transmission connecting rod 301 and a transmission roller 305. One side of the top of the transmission connecting rod 301 is fixedly connected to one side of the spraying machine frame 1. The inner wall of the middle part of the transmission connecting rod 301 is fixedly connected to a transmission telescopic column 302. The telescopic end of the transmission telescopic column 302 is fixedly connected to the transmission gantry 303, and the upper and lower ends of the transmission gantry 303 are rotatably connected to the moving wheels 304. The outer walls of the transmission rollers 305 on both sides are rotatably connected to the inner walls of the opposite sides of the transmission gantry 303. The transmission rollers 305 are arranged vertically, so that the glass cover plate is vertically transmitted on the conveyor belt 7, and the transmission rollers 305 limit the glass cover plate while transmitting the glass cover plate, so that the glass cover plate is smoothly transmitted vertically, and then the protective oil can be sprayed on both sides of the glass cover plate through the nozzle of the liquid storage tank 2 to improve the spraying efficiency;

[0036] Reference Figure 1 , Figure 4 , Figure 6As shown, the bottom of both sides of the spray machine frame 1 is fixedly connected with a double-axis motor 5, and the outer wall of one side of an output shaft of the double-axis motor 5 is connected to a smoothing mechanism 6 through a coupling. The smoothing mechanism 6 includes a rotating disk 601, a translation connecting rod 602 and a smoothing roller 607. One end of the rotating disk 601 is connected to an output shaft of the double-axis motor 5 through a coupling, and the other end of the rotating disk 601 is rotatably connected to a rotating connecting column 604. The inner wall of one end of the translation connecting rod 602 is processed with a sliding connecting groove 603, and the rotating connecting column 604 is slidably connected to the inner wall of the sliding connecting groove 603 on all sides. The outer wall of one side of the translation connecting rod 602 is fixedly connected to a smoothing gantry 608, and both sides of the smoothing roller 607 The smearing roller 607 is placed horizontally to facilitate smearing of the glass cover plate with protective oil. The bottom of the two sides of the spraying machine frame 1 is fixedly connected with a limiting cylinder 606, and a circular groove is processed inside the limiting cylinder 606. The outer wall of the bottom end of the translation connecting rod 602 is fixedly connected with a directional connecting rod 605. The outer wall around the directional connecting rod 605 is slidably connected to the inner wall of the circular groove of the limiting cylinder 606. The rotation of the rotating disk 601 causes the height of the rotating connecting column 604 on the rotating disk 601 to change, thereby pushing the translation connecting rod 602 to move up and down, and then causing the smearing roller 607 to move up and down to evenly spread the protective oil on the surface of the glass cover plate;

[0037] Reference Figure 1 , Figure 4 , Figure 5 As shown, the outer wall of one side of the other output shaft of the dual-axis motor 5 is connected to a cleaning mechanism 4 through a coupling, and the cleaning mechanism 4 includes a bearing circular plate 401 and a cleaning bearing block 406. One end of the bearing circular plate 401 is connected to the other output shaft of the dual-axis motor 5 through a coupling, and the bearing circular plate 401 is processed with evenly distributed circular grooves around it. The inner wall of the circular groove of the bearing circular plate 401 is fixedly connected to a telescopic spring 404, and the outer end of the telescopic spring 404 is fixedly connected to a telescopic connecting column 402, and the outer end of the telescopic connecting column 402 is fixedly connected to an extension connecting rod 40 3. One end of the extension link 403 is fixedly connected to a cleaning bearing block 406. The annular cleaning sponge 405 is fixedly connected to a plurality of cleaning bearing blocks 406. The annular cleaning sponge 405 is used to wipe the glass cover plate and clean the stains on its surface in a cyclic manner, so as to avoid the annular cleaning sponge 405 being filled with liquid inside and unable to absorb the cleaning liquid on the glass cover plate again when the annular cleaning sponge 405 is used for a long time. During the cyclic use of the annular cleaning sponge 405, the annular cleaning sponge 405 on the outside is simultaneously air-dried, so that the annular cleaning sponge 405 can be continuously and uninterruptedly cyclically used;

[0038] Reference Figure 2 , Figure 3As shown, the transmission gantry 303 is located on the same side and the upper and lower ends thereof are fixedly connected with two supporting links 8, two supporting connecting columns 9 are fixedly connected between the two supporting links 8, and the outer walls of the supporting connecting columns 9 are fixedly connected with limiting connecting rods 10. The supporting links 8, supporting connecting columns 9, limiting connecting rods 10 form a fixed relationship with the transmission gantry 303, and then when the transmission gantry 303 matches the thickness of the glass cover plate, the positions of the supporting links 8, supporting connecting columns 9, and limiting connecting rods 10 are arranged on both sides of the glass cover plate, the extension link 403 is slidably connected between the two limiting connecting rods 10, and the width of the cleaning bearing block 406 is greater than the width between the two limiting connecting rods 10. The width of the cleaning support block 406 is smaller than the distance between the two supporting connecting columns 9. The extension link 403 slides between the limiting links 10 to guide the annular cleaning sponge 405 to the glass cover for cleaning. The width of the cleaning support block 406 prevents it from being separated from the constraint of the limiting link 10 when cleaning the glass cover, thereby ensuring the effectiveness of cleaning. The translation link 602 is slidably connected between the two limiting links 10. The length of the smoothing gantry 608 is larger than the distance between the two supporting connecting columns 9. The limiting link 10 cooperates with the directional link 605 and the limiting cylinder 606 to limit the movement of the translation link 602, so that it moves smoothly up and down.

[0039] When the present embodiment is in use, the staff vertically places the glass cover plate on the conveyor belt 7. The glass cover plate moves toward the inside of the spraying machine frame 1 under the transmission of the conveyor belt 7 and first contacts the transmission mechanism 3. The glass cover plate pushes the two transmission rollers 305 to both sides. The moving wheels 304 on the transmission gantry 303 assist the transmission gantry 303 in moving. At the same time, the elastic force of the transmission telescopic column 302 squeezes the transmission gantry 303, so that the transmission rollers 305 are closely attached to the glass cover plate, and the vertical placement of the glass cover plate is limited and transmitted. Then the glass cover plate moves to the bottom of the liquid storage tank 2 containing the cleaning liquid, and the liquid storage tank 2 sprays the cleaning liquid to the glass cover plate through the nozzle. Cleaning liquid is sprayed on both sides to clean the surface of the glass cover plate, and the dual-axis motor 5 is operated to rotate the supporting circular plate 401, and the extending connecting rod 403 passes through the two limiting connecting rods 10 to clean the glass cover plate through the annular cleaning sponge 405. The cleaned glass cover plate is moved to the bottom of the liquid storage tank 2 containing protective oil, and the liquid storage tank 2 sprays protective oil to both sides of the glass cover plate through the nozzle. At the same time, the rotating disk 601 rotates under the action of the dual-axis motor 5, and the rotating connecting column 604 drives the translation connecting rod 602 to move up and down, so that the smearing roller 607 evenly spreads the protective oil on the surface of the glass cover plate, and finally the glass cover plate enters the drying box under the transmission of the conveyor belt 7.

[0040] Embodiment 2:

[0041] A spraying and drying method of an automatic spraying machine for a glass cover plate specifically comprises the following steps:

[0042] S1: The staff vertically places the glass cover plate on the conveyor belt 7 and transmits it under the limit of the transmission mechanism 3;

[0043] S2: The glass cover plate moves to the liquid storage tank 2 containing the cleaning liquid, and the liquid storage tank 2 sprays the cleaning liquid to both sides of the glass cover plate, and then the annular cleaning sponge 405 of the cleaning mechanism 4 circulates to clean the glass cover plate;

[0044] S3: The cleaned glass cover plate is moved to the liquid storage tank 2 containing the protective oil, and the liquid storage tank 2 sprays the protective oil on both sides of the glass cover plate, and then the protective oil on the glass cover plate is evenly spread by the spreading roller 607 of the spreading mechanism 6;

[0045] S4: The evenly spread glass cover plate enters a drying box under the transmission of the conveyor belt 7 and is dried in the drying box at a temperature of 85° C.

[0046] S5: The staff takes out the dried glass cover.

[0047] The above is a preferred specific embodiment of the present invention, but it is not the only specific embodiment of the present invention. Any modification, equivalent substitution and improvement made by any technician familiar with the field within the technical scope disclosed by the present invention in combination with the existing technology or public common sense within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. An automatic spraying machine for a glass cover plate, comprising a spraying machine frame (1), a double-axis motor (5) fixed to the bottom of both sides of the spraying machine frame (1), and a conveyor belt (7) arranged at the bottom of the spraying machine frame (1), wherein the top outer wall of the spraying machine frame (1) is fixedly connected to two liquid storage tanks (2), a cleaning liquid is placed in the front liquid storage tank (2), and a protective oil is placed in the rear liquid storage tank (2), and nozzles are extended from the bottom of the two liquid storage tanks (2), characterized in that: Also includes: A plurality of transmission mechanisms (3), wherein the transmission mechanisms (3) include vertically arranged transmission rollers (305) for limiting the transmission of the vertically arranged glass cover plates; Two smoothing mechanisms (6), the smoothing mechanisms (6) comprising a smoothing roller (607) that moves up and down and is placed laterally, and is used to smooth the protective oil on the surface of the glass cover plate; Two cleaning mechanisms (4), each of which comprises a circular cleaning sponge (405) for recycling and used to clean stains on the surface of the glass cover plate; The transmission mechanism (3) further comprises a transmission connecting rod (301) fixedly connected to one side of the spray machine frame (1); a transmission telescopic column (302) is fixedly connected to the inner wall of the middle part of the transmission connecting rod (301); the telescopic end of the transmission telescopic column (302) is fixedly connected to a transmission gantry (303); the upper and lower ends of the transmission gantry (303) are rotatably connected to movable rotating wheels (304); and the outer walls of both sides of the transmission roller (305) are rotatably connected to the inner walls of the opposite sides of the transmission gantry (303); The smoothing mechanism (6) further comprises a rotating disc (601) connected to an output shaft of the dual-axis motor (5) via a coupling, and the other end of the rotating disc (601) is rotatably connected to a rotating connecting column (604); the smoothing mechanism (6) further comprises a translation connecting rod (602), the inner wall of one end of the translation connecting rod (602) is processed with a sliding connecting groove (603), the rotating connecting column (604) is slidably connected to the inner wall of the sliding connecting groove (603) on all sides, the outer wall of one side of the translation connecting rod (602) is fixedly connected to a smoothing gantry (608), and the two sides of the smoothing roller (607) are rotatably connected to the inner walls of the two opposite sides of the smoothing gantry (608); The cleaning mechanism (4) further comprises a bearing circular plate (401) connected to the other output shaft of the dual-axis motor (5) via a coupling, the bearing circular plate (401) being machined with evenly distributed circular grooves on its periphery, a telescopic spring (404) being fixedly connected to the inner wall of the circular groove of the bearing circular plate (401), a telescopic connecting column (402) being fixedly connected to the outer end of the telescopic spring (404), an extension connecting rod (403) being fixedly connected to the outer end of the telescopic connecting column (402), a cleaning bearing block (406) being fixedly connected to one end of the extension connecting rod (403), and the annular cleaning sponge (405) being fixedly connected to a plurality of cleaning bearing blocks (406).

2. The automatic spraying machine for glass cover according to claim 1, characterized in that: The transmission gantry (303) is fixedly connected to two supporting connecting rods (8) at the upper and lower ends on the same side, two supporting connecting columns (9) are fixedly connected between the two supporting connecting rods (8), and the outer walls around the supporting connecting columns (9) are fixedly connected to limiting connecting rods (10).

3. The automatic spraying machine for glass cover according to claim 2, characterized in that: The bottom of both sides of the spray machine frame (1) are fixedly connected with limiting cylinders (606), and a circular groove is processed inside the limiting cylinder (606). The outer wall of the bottom end of the translation connecting rod (602) is fixedly connected with a directional connecting rod (605), and the outer wall around the directional connecting rod (605) is slidably connected to the inner wall of the circular groove of the limiting cylinder (606).

4. The automatic spraying machine for glass cover according to claim 3, characterized in that: The translation link (602) is slidably connected between the two limit links (10), and the length of the smoothing gantry (608) is greater than the distance between the two supporting connecting columns (9).

5. The automatic spraying machine for glass cover according to claim 4, characterized in that: The extension link (403) is slidably connected between the two limiting links (10), the width of the cleaning bearing block (406) is greater than the distance between the two limiting links (10), and the width of the cleaning bearing block (406) is less than the distance between the two supporting connecting columns (9).

6. A spraying and drying method of an automatic spraying machine for a glass cover plate according to any one of claims 1 to 5, characterized in that: The specific steps include: S1: A worker places the glass cover plate vertically on the conveyor belt (7) and transports it under the limit of the transport mechanism (3); S2: The glass cover plate moves to a liquid storage tank (2) containing cleaning liquid, and the liquid storage tank (2) sprays the cleaning liquid to both sides of the glass cover plate, and then the glass cover plate is circulated and cleaned through the annular cleaning sponge (405) of the cleaning mechanism (4); S3: The cleaned glass cover plate is moved to a liquid storage tank (2) containing protective oil, and the liquid storage tank (2) sprays protective oil on both sides of the glass cover plate, and then the protective oil on the glass cover plate is evenly spread by the spreading roller (607) of the spreading mechanism (6); S4: the evenly spread glass cover plate is transported by a conveyor belt (7) into a drying box and dried at a temperature of 85° C. in the drying box; S5: The staff takes out the dried glass cover.

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