A glass coating device and a glass coating method

Abstract

The application discloses a glass coating device and a glass coating method, and relates to the technical field of glass coating devices.The glass coating device comprises a coating device main body, the bottom of the coating device main body is provided with a glass main body, the inside of the coating device main body is respectively provided with an air inlet slit and an air outlet slit, and the air inlet slit and the air outlet slit are used for making a precursor and fourth nitrogen enter and discharge; the first bottom surface, the second bottom surface and the third bottom surface arranged between the air inlet slit and the air outlet slit are designed, the flow, the temperature and the direction of the multiple nitrogen output from the three bottom surfaces are regulated and controlled, the nitrogen is used not only as a carrier gas, but also as a power for driving the precursor to have more contact with the glass surface and a power for driving the precursor to be transversely uniform, the utilization rate of the precursor is improved, the effective output time of the precursor is prolonged, and the coating effect on the glass surface is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of glass coating machines, and particularly relates to a glass coating machine and a glass coating method. BACKGROUND

[0002] Chemical vapor reaction coating is a commonly used method for coating on the surface of glass. Generally, a gaseous precursor containing elements constituting a thin film is carried by a carrier gas (such as nitrogen) from an inlet slit of a coating machine, and the inlet slit and an exhaust slit are transversely arranged above the longitudinally moving glass. The bottom surface of the coating machine is between the inlet slit and the exhaust slit, and the bottom surface is usually a plane. The precursor chemically reacts when passing below the bottom surface, and the solid-phase product of the reaction is deposited on the surface of the glass to form a thin film. The gaseous product of the reaction, which is called tail gas, is discharged from the exhaust slit together with the unreacted precursor and the carrier gas that does not participate in the reaction.

[0003] The prior art has the problems that the utilization rate of the precursor is too low, and only less than 30% of the precursor participates in the chemical reaction, and a large amount of unreacted precursor is discharged from the exhaust slit, resulting in serious waste of coating raw materials; and the effective output time of the precursor is too short. The duration from the start of use of the coating machine to the blockage of the inlet slit, which leads to unqualified film layers, is called the effective output time of the precursor. Generally, after the effective output time reaches 12-48 hours, the precursor output from the inlet slit will be uneven in the transverse direction, and the solid-phase product of the chemical reaction will be deposited not only on the surface of the glass but also at the lower end of the inlet slit. In actual production, the deposition phenomenon at the lower end of the slit will occur with the accumulation of coating time, and the deposition is not uniformly distributed. A certain point of the lower end of the slit will first become narrow or blocked, so that the precursor output from the point is reduced or completely absent, resulting in uneven distribution of the precursor in the transverse direction. The observable result is that there are longitudinally continuous film layer abnormalities, such as color and transmittance abnormalities, in a certain position of the film layer of the coated glass product. The coating production can only be stopped to clean the outlet end of the inlet slit to resume the coating production. Therefore, the application provides a glass coating machine and a glass coating method. SUMMARY

[0004] The application aims to provide a glass coating machine and a glass coating method to solve the technical problems in the background.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: a glass coating machine, comprising a coating machine main body, a glass main body is arranged at the bottom of the coating machine main body, an inlet slit and an exhaust slit are respectively arranged in the interior of the coating machine main body, and the inlet slit and the exhaust slit are used for the inlet and outlet of a precursor and a fourth nitrogen gas.

[0006] An extension mechanism is arranged in the interior of the coating machine main body, and the extension mechanism comprises:

[0007] A combined bottom surface is disposed at the bottom of the coating unit body for the precursor and fourth nitrogen gas to pass between the glass body and the coating unit body.

[0008] Preferably, the combined bottom surface includes a first bottom surface, a second bottom surface, and a third bottom surface. The first bottom surface and the third bottom surface are parallel to the glass body, the second bottom surface is inclined to the glass body, and the distance between the bottom of the third bottom surface and the glass body is greater than the distance between the bottom of the first bottom surface and the glass body.

[0009] Preferably, the first bottom surface includes a first open area and a non-open area disposed on the coating body, wherein a plurality of first holes are provided on the first open area for outputting first nitrogen gas;

[0010] The second bottom surface is a second opening area, and multiple second holes are opened on the second opening area for outputting second nitrogen gas;

[0011] The third bottom surface is a third opening area, and multiple third holes are opened on the third opening area for outputting third nitrogen gas.

[0012] Preferably, the third hole includes multiple single openings that are vertically downward and multiple double openings that are inclined downward.

[0013] Preferably, a film layer detector is provided on one side of the coating machine body, and the film layer detector moves laterally back and forth to scan the color and transmittance of the film on the glass body.

[0014] Preferably, the extension mechanism further includes:

[0015] Multiple sets of first tubes, the first tubes are disposed inside the coating device body, and the bottom of the first tubes are connected to the first hole;

[0016] Multiple sets of second tubes are provided inside the coating unit body, and the bottom of the second tubes are connected to the second hole;

[0017] Multiple sets of third tubes are provided inside the coating unit body, and the bottom of the third tubes are connected to the third hole.

[0018] Preferably, the bottom of the coating unit is provided with multiple sets of blocking components to slow down the speed of the precursor and the fourth nitrogen gas;

[0019] The blocking component includes a track and a long baffle. A T-shaped slide plate is slidably disposed inside the track, and the long baffle is fixed to the top of the T-shaped slide plate.

[0020] Preferably, a short baffle is provided on one side of the long baffle, the short baffle has an adjustment groove inside, a fixing nut is fixedly provided on one side of the long baffle, and a locking nut is threadedly connected to the outside of the fixing nut.

[0021] Preferably, the top of the first tube is provided with a first flow meter and a first flow regulating valve for controlling the first nitrogen output.

[0022] This invention also discloses a glass coating method, which specifically includes the following steps:

[0023] S1, the precursor and the fourth nitrogen gas form the first mixed gas, which is transported from the inlet slit into the coating unit body;

[0024] S2. The first mixed gas enters below the coating unit, and the precursor undergoes a chemical reaction above the glass unit. The solid products of the reaction are deposited on the surface of the glass unit to form a thin film.

[0025] S3. During the thin film formation process, the first nitrogen gas, the second nitrogen gas, and the third nitrogen gas are respectively output downward through the first tube, the second tube, and the third tube in the extension mechanism to contact the first mixed gas.

[0026] S4, exhaust gas, unreacted precursors, and nitrogen gas that does not participate in the reaction are discharged outward from the exhaust slit;

[0027] S5. The coated glass body passes under the film layer detector, which scans horizontally back and forth above the glass body to measure the color and transmittance of the film on the glass body.

[0028] S6. When there is a blockage in the air intake slit, the first flow regulating valve reduces the first nitrogen output of the two first holes closest to the blockage, so that the precursor passing under the first bottom surface can quickly reach uniformity in the lateral direction.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] (1) The present invention, through the designed extension mechanism, sets a first bottom surface, a second bottom surface and a third bottom surface between the air intake slit and the exhaust slit, and regulates the flow rate, temperature and direction of multiple nitrogen gases output from the above three bottom surfaces, so that nitrogen gas is not only used as a carrier gas, but also as a driving force to drive the precursor to have more contact with the glass surface and to drive the precursor to be laterally uniform. This not only improves the utilization rate of the precursor, but also extends the effective output time of the precursor and improves the effect of coating the glass surface.

[0031] (2) The present invention, through the design of the blocking component, allows the precursor and the fourth nitrogen gas to pass between the coating unit and the glass body after entering from the air inlet slit during use. At this time, the precursor and the fourth nitrogen gas will pass through the multiple blocking components in an S-shape, making their passage speed slower, further increasing the contact time between the precursor and the glass, and further improving the coating effect on the glass surface.

[0032] (3) The present invention, through the design of the first flow meter and the first flow regulating valve, when there is a blockage point in the air inlet slit, reduces the flow rate of the first flow regulating valve on the first pipe at the top of the two first holes closest to the blockage point, so that the precursor passing under the first bottom surface can quickly reach uniformity in the lateral direction, without the need to stop the machine to clean the bottom outlet end of the air inlet slit, which facilitates coating production. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the main structure of the existing coating device of the present invention;

[0034] Figure 2 This is a schematic cross-sectional view of the coating device body of the present invention;

[0035] Figure 3 This is a schematic diagram of the blocking component structure of the present invention;

[0036] Figure 4 This is a schematic diagram of the structure of the first tube, the second tube, and the third tube of the present invention;

[0037] Figure 5 For the present invention Figure 2 Schematic diagram of the AA structure;

[0038] Figure 6 For the present invention Figure 5 Schematic diagram of the BB structure;

[0039] Figure 7 For the present invention Figure 5 Enlarged structural diagram of the middle section (I);

[0040] Figure 8 This is a schematic diagram of the left-side structure of the long baffle and the short baffle of the present invention;

[0041] Figure 9 For the present invention Figure 2 Schematic diagram of the CC structure;

[0042] In the diagram: 1. First bottom surface; 11. First opening area; 12. No-hole area; 1a. First hole; 1b. First tube; 2. Second bottom surface; 2a. Second hole; 2b. Second tube; 3. Third bottom surface; 3a. Third hole; 3b. Third tube; 4. Inlet slit; 5. Combined bottom surface; 6. Exhaust slit; 7. Glass body; 8. Coating device body; D. Blocking point; M. First adjacent hole; N. Second adjacent hole; Q. Vertical foot; R. First opening; S. Second opening; 9. Long baffle; 901. Short baffle; 902. Track; 903. T-shaped sliding plate; 904. Locking nut; 905. Adjustment groove; 906. Fixing nut. Detailed Implementation

[0043] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Example 1

[0045] Please see Figures 1-7 The present invention provides a technical solution: a glass coating apparatus, comprising a coating apparatus body 8, a glass body 7 disposed at the bottom of the coating apparatus body 8, an air inlet slit 4 and an air outlet slit 6 respectively opened inside the coating apparatus body 8 for allowing the precursor and the fourth nitrogen gas to enter and exit, and an extension mechanism disposed inside the coating apparatus body 8, the extension mechanism including a combined bottom surface 5 disposed at the bottom of the coating apparatus body 8 for the precursor and the fourth nitrogen gas to pass through between the glass body 7 and the coating apparatus body 8;

[0046] The combined bottom surface 5 includes a first bottom surface 1, a second bottom surface 2 and a third bottom surface 3. The first bottom surface 1 and the third bottom surface 3 are parallel to the glass body 7, the second bottom surface 2 is inclined to the glass body 7, and the distance between the bottom of the third bottom surface 3 and the glass body 7 is greater than the distance between the bottom of the first bottom surface 1 and the glass body 7.

[0047] The first bottom surface 1 includes a first open area 11 and a non-open area 12 disposed on the coating body 8. The first open area 11 is provided with a plurality of first holes 1a for outputting first nitrogen gas. The second bottom surface 2 is a second open area, and the second open area is provided with a plurality of second holes 2a for outputting second nitrogen gas. The third bottom surface 3 is a third open area, and the third open area is provided with a plurality of third holes 3a for outputting third nitrogen gas.

[0048] The first hole 1a and the second hole 2a are both single openings pointing vertically downwards. The third hole 3a includes multiple single openings pointing vertically downwards and multiple double openings pointing downwards at an angle. (From the attached...)Figure 5 Looking at the top, there are multiple sets of third holes 3a with one set of vertically downward openings between them, and the rest are set with double openings tilted downwards.

[0049] A film layer detector is installed on one side of the coating body 8. The film layer detector moves laterally back and forth to scan the color and transmittance of the film on the glass body 7.

[0050] The extension mechanism also includes multiple sets of first tubes 1b, the top of which is provided with a first heater for heating the first nitrogen gas. The first tubes 1b are located inside the coating body 8, and the bottom of the first tubes 1b is connected to the first hole 1a.

[0051] Multiple sets of second tubes 2b are provided inside the coating unit body 8, and the bottom of the second tubes 2b is connected to the second hole 2a.

[0052] Multiple sets of third tubes 3b are provided inside the coating unit body 8, and the bottom of the third tubes 3b is connected to the third hole 3a.

[0053] The tops of the first tube 1b, the second tube 2b, and the third tube 3b are each equipped with a corresponding second flow meter, a second flow regulating valve, a second heater, and an insulated delivery pipe. The second heater heats the nitrogen gas that is to be delivered into the first tube 1b, the second tube 2b, and the third tube 3b, respectively. The heated nitrogen gas then moves downward to the space between the glass body 7 and the coating unit body 8, slowing down the speed at which the precursor and the fourth nitrogen gas pass through, and increasing the contact time between the precursor and the surface of the glass body 7.

[0054] This invention, through its designed extension mechanism, sets a first bottom surface 1, a second bottom surface 2, and a third bottom surface 3 between the air intake slit 4 and the exhaust slit 6, and regulates the flow rate, temperature, and direction of multiple nitrogen gases output from the above three bottom surfaces. This allows the nitrogen gas to be used not only as a carrier gas, but also as a driving force to increase the contact between the precursor and the surface of the glass body 7, as well as to drive the precursor to move laterally and uniformly. This not only improves the utilization rate of the precursor, but also extends the effective output time of the precursor, thereby enhancing the coating effect on the surface of the glass body 7.

[0055] Example 2

[0056] Please refer to Example 1. Figure 2 , Figure 3 , Figure 8 and Figure 9 The bottom of the coating unit 8 is provided with multiple sets of blocking components to slow down the speed of the precursor and the fourth nitrogen gas.

[0057] The blocking component includes a track 902 and a long baffle 9. A T-shaped slide plate 903 is slidably arranged inside the track 902. The top of the track 902 located at the bottom of the second bottom surface 2 is inclined and flush with the bottom of the second bottom surface 2. The long baffle 9 is fixed to the top of the T-shaped slide plate 903. A short baffle 901 is provided on one side of the long baffle 9. An adjustment groove 905 is opened inside the short baffle 901. A fixing nut 906 is fixedly arranged on one side of the long baffle 9. A locking nut 904 is threadedly connected to the outside of the fixing nut 906.

[0058] The present invention, through the design of the blocking component, ensures that during use, after the precursor and the fourth nitrogen gas enter between the coating unit body 8 and the glass body 7 through the air inlet slit 4, they pass between the short baffle 901 in the blocking component and the inner wall of the coating unit body 8. At this time, the precursor and the fourth nitrogen gas will pass through multiple blocking components in an S-shape, making their passage speed slower, further increasing the contact time between the precursor and the glass body 7, and further improving the coating effect on the surface of the glass body 7.

[0059] Example 3

[0060] Please refer to Example 2. Figure 5 and Figure 7 The top of the first pipe 1b is equipped with a first flow meter and a first flow regulating valve to control the first nitrogen output. This method is applied to coating float glass (tin coating). The temperature of the glass body 7 below the coating machine is 630℃. The glass body 7 moves under the action of the supporting drive mechanism below it. The precursor is a gas containing tin, a constituent element of the thin film, and the amount of the precursor is 6 Nm³. 3 / h (These are parameters under standard conditions; all gas quantities mentioned below are under standard conditions), the amount of nitrogen is 200 Nm³. 3 / h, the 200Nm 3 The nitrogen gas concentration per hour ( / h) represents the total nitrogen usage, including the first, second, third, and fourth nitrogen gases mentioned above, with proportions of 30%-40%, 15%-25%, 10%-20%, and 30%-60%, respectively. In this embodiment, it is specifically 32 Nm³. 3 / h、21NNm 3 / h, 15Nm 3 / h、32Nm 3 / h; The temperature and flow rate of each of the above nitrogen gases are provided by their respective heaters, flow meters, flow regulating valves and insulated delivery pipes located outside the coating unit 8.

[0061] This invention, through the design of a first flow meter and a first flow regulating valve, when a blockage point D appears in the air inlet slit 4, reduces the flow rate of the first flow regulating valve on the first pipe 1b at the top of the two first holes 1a closest to the blockage point D, so that the precursor passing under the first bottom surface 1 can quickly achieve uniformity in the lateral direction, without the need to stop the machine to clean the bottom outlet end of the air inlet slit 4, which facilitates coating production.

[0062] Example 4

[0063] Please refer to Example 3. Figures 1-9 The present invention also discloses a glass coating method, which specifically includes the following steps:

[0064] S1, Precursor (6Nm) 3 / h) and the fourth nitrogen gas (32Nm 3 The first mixed gas, consisting of / h), is transported from the inlet slit 4 into the coating unit body 8;

[0065] S2. The first mixed gas enters below the coating body 8. The first mixed gas mixes with the first nitrogen gas, the second nitrogen gas and the third nitrogen gas respectively delivered from the first hole 1a, the second hole 2a and the third hole 3a. The precursor undergoes a chemical reaction above the glass body 7. The solid products of the reaction are deposited on the surface of the glass body 7 to form a thin film.

[0066] S3. During the thin film formation process, the first nitrogen gas, the second nitrogen gas, and the third nitrogen gas are respectively output downward through the first tube 1b, the second tube 2b, and the third tube 3b in the extension mechanism to contact the first mixed gas. The first nitrogen gas, the second nitrogen gas, and the third nitrogen gas can increase the contact time between the first mixed gas and the surface of the glass body 7, thereby increasing the reaction effect. By staggering the multiple long baffles 9 and short baffles 901 in the extension mechanism, the first mixed gas forms an S-shaped channel as it flows towards the exhaust slit 6, further increasing the contact time between the first mixed gas and the surface of the glass body 7.

[0067] S31, Stage Below First Bottom Surface 1

[0068] The first mixed gas enters below the first bottom surface 1;

[0069] The first hole 1a is arranged in a row when viewed from the front to the back of the coating body 8 and in the direction of movement toward the glass body 7. The holes of the first hole 1a are evenly distributed in the horizontal direction. Inside the coating body 8 above the first opening area 11, there is a row of first pipes 1b that are vertically distributed and correspond to the row of first holes 1a. Each first pipe 1b is equipped with a first flow meter and a first flow regulating valve on the pipe that is above the top surface of the coating body 8. Then each first pipe 1b is connected to a first heater that heats the first nitrogen gas.

[0070] In this step, all the aforementioned first flow regulating valves are fully opened, and the first nitrogen gas (30 Nm³) at a temperature of 630℃ is introduced. 3 / h) The first heater that heats the first nitrogen gas outputs from the first tube 1b through the first hole 1a, that is, the first nitrogen gas ejected from each first hole 1a has the same temperature and the same flow rate;

[0071] In this step, the first part of the precursor participates in the chemical reaction, generating the first thin film on the surface of the glass body 7 while generating the first tail gas; the first tail gas, the remaining part of the precursor other than the first part (including the second part, the third part and the fourth part described below), and the first and fourth nitrogen gases form a second mixed gas at the end of the first bottom surface 1, and the temperature of the second mixed gas is 630°C.

[0072] S32, the stage below the second bottom surface 2

[0073] The second mixed gas enters below the second bottom surface 2;

[0074] The second holes 2a, viewed from the front to the back and to the right of the coating body 8, are arranged in multiple rows. Each row of the second holes 2a has identical structural dimensions, with holes evenly distributed laterally and evenly spaced longitudinally in the direction of glass body 7 movement. In this embodiment, three rows of second pipes 2b, corresponding to the three rows of second holes 2a, are vertically distributed inside the coating body 8 above the second bottom surface 2. Each second pipe 2b, extending above the top surface of the coating body 8, is equipped with a second flow meter and a second flow regulating valve. Each row of pipes is connected to its corresponding second heater for heating the second nitrogen gas. There are three second heaters, each with a temperature that increases sequentially and equally with the distance between each row and the first bottom surface 1. In this embodiment, the second nitrogen gas (21 Nm³)... 3 The temperature output from the second hole 2a of the three columns increases by an equal amount of 10°C with the increase of the distance between each column and the first bottom surface 1, specifically: 640°C, 650°C, and 660°C, with each column outputting 7 Nm. 3 / h;

[0075] In this step, the function of the second bottom surface 2 is that, simultaneously with the second mixed gas entering below the second bottom surface 2, the second nitrogen gas flows downwards from the second hole 2a on the second bottom surface. Since the temperature of the second nitrogen gas (greater than or equal to 640°C) is higher than the temperature of the second mixed gas (630°C), the second nitrogen gas can briefly occupy the upper layer of the cross-section below the second bottom surface 2 and flow forward. At the same time, the second mixed gas can also briefly occupy the lower layer of the cross-section below the second bottom surface 2 and flow forward. Both flow forward in parallel, thus driving the process.

[0076] The space of the second mixed gas is compressed, so that the precursor in it cannot diffuse upward and can only move close to the surface of the glass body 7. This increases the contact time between the precursor and the surface of the glass body 7, allowing the second part of the precursor to participate in the reaction in this area, thereby increasing the utilization rate of the precursor.

[0077] Meanwhile, the second bottom surface 2 also serves to continuously generate second exhaust gas as the precursor in the second mixed gas moves forward. Therefore, the amount of exhaust gas below the second bottom surface 2 is constantly increasing. In this invention, the temperature of the three rows of second nitrogen gas increases sequentially and equally as the distance between each row and the first bottom surface 1 increases. This allows the volume of the second nitrogen gas in the upper part of the cross section below the second bottom surface 2 to increase accordingly as it flows forward. This further increases the pressure of the upper second nitrogen gas on the gas that is constantly expanding in the lower space, so that the precursor is still suppressed in the lower layer. This can continue to increase the contact time between the precursor and the surface of the glass body 7, allowing more precursor to participate in the reaction in this area, and further increasing the utilization rate of the precursor.

[0078] In this step, the second part of the precursor participates in the chemical reaction, generating a second tail gas while forming a second film on the surface of the first film; the second tail gas, the remaining part of the precursor other than the first and second parts (including the third and fourth parts described below), and the fourth, second, and first nitrogen gas and the first tail gas form a third mixed gas at the end of the second bottom surface 2.

[0079] S33, the stage below the third bottom surface 3

[0080] The third mixed gas enters below the third bottom surface 3;

[0081] like Figure 5 As shown, the third bottom surface 3 has five rows of third holes 3a arranged in a direction parallel to the movement of the glass body 7. The first, third and fifth rows are single openings with vertical downward openings, while the second and fourth rows are double openings with openings tilted to the left and right and downward. The rows are arranged at equal intervals in the horizontal direction, and the holes in each row are evenly distributed in the direction of movement of the glass body 7.

[0082] Inside the coating unit 8 above the third bottom surface 3, there are five vertically distributed third pipes 3b corresponding to the five rows of third holes 3a. Each third pipe 3b, extending above the top surface of the coating unit 8, is equipped with a third flow meter and a third flow regulating valve. Each third pipe 3b is then connected to a third heater for heating the third nitrogen gas. In this step, the third nitrogen gas (15 Nm³) 3 The output temperature of the ( / h) is 630℃, and the output of each column is 3Nm. 3 / h;

[0083] In this step, the function of the third bottom surface 3 is that, since the first, third, and fifth columns are single openings that face vertically downwards, and the second and fourth columns are double openings that face downwards and to the left and right, and the flow rate of each column is the same, the third nitrogen gas output from the first, third, and fifth columns and the third nitrogen gas output from the second and fourth columns drive the second mixed gas to form a transverse vortex in the area below the third bottom surface 3, thereby increasing the contact time between the precursor and the surface of the glass body 7, and further increasing the utilization rate of the precursor.

[0084] In this step, the third part of the precursor participates in the reaction, generating a third tail gas while forming a third film on the surface of the second film; the third tail gas, the fourth part of the precursor other than the first, second and third parts, and the fourth, third, second, first nitrogen gas, second and first tail gas spiral forward below the third bottom surface 3 and form a fourth mixed gas at the end of the third bottom surface 3.

[0085] S4, exhaust gas, unreacted precursors, and nitrogen gas that does not participate in the reaction are discharged together from exhaust slit 6. At this time, the fourth mixed gas is discharged from exhaust slit 6. In this embodiment, the amount of unreacted precursors in the fourth mixed gas discharged from exhaust slit 6 is 2.4 Nm. 3 / h, meaning the utilization rate of the precursor reaches 60%, which is a significant improvement over existing technologies;

[0086] S5. The coated glass body 7 passes under the film layer detector. The film layer detector scans horizontally back and forth above the glass to measure the color and transmittance of the film on the glass body 7.

[0087] S6. When there is a blockage in the air intake slit 4, the first flow regulating valve reduces the first nitrogen output of the two first holes 1a closest to the blockage, so that the precursor passing under the first bottom surface 1 can quickly reach uniformity in the lateral direction.

[0088] If the quality inspection result deviates from the specified value by more than the acceptable deviation, and this deviation is continuously distributed parallel to the moving direction of the glass body 7 at a certain position on the surface of the glass body 7, it can be determined that a blockage point D has occurred in the air inlet slit 4 at that position. In this embodiment, the duration from the start of use of the coating unit 8 to the occurrence of unqualified film quality due to blockage is 40.1 hours, that is, the effective output time of the precursor is 40.1 hours. After this, if no adjustment is made, the precursor will be in an ineffective output state.

[0089] S81, Adjustment

[0090] In this step, the function of the first bottom surface 1 is to reduce the flow rate of the two first holes 1a closest to the blockage point D when the blockage point D is determined to be blocked, so that the precursor passing under the first bottom surface 1 can quickly achieve uniformity in the lateral direction. The reduction in flow rate of the first holes 1a is 1% to 100% of the original flow rate. The specific operation includes the following steps:

[0091] S82, Set Number

[0092] The number includes:

[0093] a. First column numbering: Divide the intake slit 4 into grid points with equal spacing in the horizontal direction (the spacing is 1mm in this embodiment), and number each of the grid points.

[0094] b. The second column of numbering: Divide the surface of the glass body 7 into grid points with equal spacing in the horizontal direction (the spacing is 10mm in this embodiment), and assign numbers to each of the grid points.

[0095] c. The third column numbering: number each hole in the first hole 1a of a column.

[0096] S83. Determine the blockage point D;

[0097] According to S6, which exceeds the acceptable deviation at the grid point position in the second column of the numbering, find the corresponding grid point position in the first column of the numbering (both are on the same straight line parallel to the moving direction of the glass body 7). This position is the blockage point of the air intake slit 4. Figure 7 As shown, the blockage point is D;

[0098] S84, Adjust the flow rate of the first orifice 1a

[0099] Then, find the numbers of the two first holes 1a closest to the blockage point D in the third column. Based on the distance between the two holes and the blockage point D, reduce the output of the first nitrogen gas proportionally for each hole. The closer the hole is to the blockage point D, the greater the reduction in gas flow rate. The reduction in flow rate is 1% to 100% of the original flow rate. In this embodiment, assume that the output flow rate of each hole in a column of first holes 1a in step S31 is 1. Figure 7 As shown, the third column numbers of the two first holes 1a closest to the blockage point D are the first adjacent hole M and the second adjacent hole N, respectively. A perpendicular line is drawn from point D to the first adjacent hole M and the second adjacent hole N, with the foot of the perpendicular being Q. In this embodiment, MQ / QN = 4:6. Therefore, the output of the first nitrogen gas in the first hole 1a at the first adjacent hole M is reduced to 0.4l (the reduction is 60% of the original flow rate), and the output of the first nitrogen gas in the first hole 1a at the second adjacent hole N is reduced to 0.6l (the reduction is 40% of the original flow rate). At the same time, the flow rate of the remaining first holes 1a remains unchanged at l.

[0100] In this step, when the output of the first nitrogen gas from the two first proximity holes M and N, which are closest to the blockage point D, is reduced, the pressure of the first nitrogen gas output from these two holes on the first mixed gas directly below it will decrease. Therefore, the first mixed gas located directly below the first proximity holes M and N will diffuse upwards (towards the first bottom surface 1). Simultaneously, since the flow rates of the remaining first holes 1a on the left and right sides of the first proximity holes M and N remain unchanged, the first mixed gas on the left and right sides will rapidly replenish the gas below the first proximity holes M and N. Figure 7 The first mixed gas below the first orifice R and the multiple first holes 1a to its left, and the first mixed gas below the second orifice S and the multiple first holes 1a to its right, will rapidly diffuse laterally downwards towards the first adjacent hole M and the second adjacent hole N. The amount of first mixed gas replenished below the first adjacent hole M is proportionally greater, thus rapidly homogenizing the first mixed gas below the first opening area 11 of the first bottom surface 1 laterally. The subsequent non-porous area 12 has a longitudinal length at least three times the longitudinal length of the first opening area 11, providing sufficient space and time for the gas to homogenize and stabilize. That is, by reducing the output of the first nitrogen gas from the two first holes 1a closest to the blockage point D, the uneven lateral output of the precursor caused by the blockage point D is restored to uniformity.

[0101] S85, Continue running steps S32, S33, S5, S6, and S7.

[0102] If the quality inspection results are within acceptable deviations from the specified values, it indicates that the unevenness of the film layer caused by the blockage point D has been completely eliminated, and the coating unit 8 can continue to operate according to the parameters adjusted in S84, that is, the effective output time of the precursor is extended.

[0103] If the quality inspection results show improvement compared to the specified values, but still exceed the acceptable deviation, and the deviation is continuously distributed in the longitudinal direction of the coated glass, it can be determined that the coating quality defect caused by the blockage point D of the air outlet at the corresponding longitudinal position has not been completely eliminated. Then, repeat step S83, and based on the quality inspection results, continue to reduce the output of the first phase near hole M and the second phase near hole N of the first hole 1a proportionally on the basis of the previous reduction in flow rate, until the quality inspection is qualified.

[0104] In this embodiment, after adjusting in step S8 to restore the coating quality to qualified and maintaining it for 10.5 hours, the coating quality defect reappeared, that is, the effective output time of the precursor was extended by 10.5 hours. In contrast, in the prior art, after the gas outlet channel is blocked at point D, the machine can only be stopped for cleaning before coating production can be resumed. In other words, the effective output time of the precursor in the prior art cannot be extended.

[0105] Working principle and usage process of this invention:

[0106] In use, the first mixed gas, consisting of the precursor and the fourth nitrogen gas, enters the space between the coating unit body 8 and the glass body 7 through the inlet slit 4. Then, the precursor undergoes a chemical reaction above the glass body 7, and the solid products of the reaction are deposited on the surface of the glass body 7 to form a thin film. As the precursor moves to the right, the first, second, and third nitrogen gases, heated in the first pipe 1b, second pipe 2b, and third pipe 3b, are blown downwards. The first, second, and third nitrogen gases are distributed at the bottom of the coating unit body 8, which prolongs the contact time between the precursor and the upper surface of the glass body 7 and increases the utilization rate of the precursor. The gaseous products of the reaction are called tail gas. The tail gas, unreacted precursor, and nitrogen gas that does not participate in the reaction are discharged together from the exhaust slit 6.

[0107] As the precursor enters the space between the coating unit 8 and the glass body 7 through the air inlet slit 4 and then exits through the exhaust slit 6, it passes through multiple sets of blocking components. These blocking components are staggered at the bottom of the coating unit 8. The channel formed between the short baffle 901 on the blocking component and the inner wall of the coating unit 8 is S-shaped when viewed from above. When the precursor passes through, most of the upper part of the precursor passes through the formed S-shaped channel, which increases the time the precursor passes through and the contact time between the precursor and the surface of the glass body 7, thereby further improving the coating effect and quality of the glass body 7.

[0108] When a blockage point D appears in the air intake slit 4, the flow rate of the first flow regulating valve on the first pipe 1b at the top of the two first holes 1a closest to the blockage point D is controlled and reduced, so that the flow rate through the two closest first holes 1a is reduced, and the precursor passing under the first bottom surface 1 quickly reaches uniformity in the lateral direction. There is no need to stop the machine to clean the bottom outlet end of the air intake slit 4, which facilitates coating production.

[0109] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A glass coater comprising a coater body (8) provided at its bottom with a glass body (7), characterized in that: The inner part of the coating machine body (8) is respectively provided with an air inlet slit (4) and an air outlet slit (6) for the precursor and the fourth nitrogen to enter and discharge; The inner part of the coating machine body (8) is provided with an extension mechanism, which comprises: A combined bottom surface (5) is arranged at the bottom of the coating machine body (8) for the precursor and the fourth nitrogen to pass through between the glass body (7) and the coating machine body (8); The combined bottom surface (5) comprises a first bottom surface (1), a second bottom surface (2) and a third bottom surface (3), the first bottom surface (1) and the third bottom surface (3) are parallel to the glass body (7), the second bottom surface (2) is inclined to the glass body (7), and the distance between the bottom of the third bottom surface (3) and the glass body (7) is greater than the distance between the bottom of the first bottom surface (1) and the glass body (7); The first bottom surface (1) comprises a first aperture area (11) and a non-aperture area (12) arranged on the coating machine body (8), a plurality of first holes (1a) are arranged on the first aperture area (11) for outputting the first nitrogen; The second bottom surface (2) is a second aperture area, a plurality of second holes (2a) are arranged on the second aperture area for outputting the second nitrogen; The third bottom surface (3) is a third aperture area, a plurality of third holes (3a) are arranged on the third aperture area for outputting the third nitrogen; The extension mechanism further comprises: A plurality of first pipes (1b) are arranged in the inner part of the coating machine body (8), and the bottom of the first pipe (1b) is communicated with the first hole (1a); A plurality of second pipes (2b) are arranged in the inner part of the coating machine body (8), and the bottom of the second pipe (2b) is communicated with the second hole (2a); A plurality of third pipes (3b) are arranged in the inner part of the coating machine body (8), and the bottom of the third pipe (3b) is communicated with the third hole (3a).

2. The glass coater of claim 1, wherein: The third hole (3a) comprises a plurality of single openings with vertical downward and a plurality of double openings with inclined downward.

3. The glass coater of claim 1, wherein: A film layer detector is arranged on one side of the coating machine body (8), which moves transversely and reciprocally to scan the color and transmittance of the film on the glass body (7).

4. The glass coater of claim 1, wherein: A plurality of blocking pieces are arranged at the bottom of the coating machine body (8) for delaying the speed of the precursor and the fourth nitrogen; The blocking piece comprises a track (902) and a long baffle (9), a T-shaped sliding plate (903) is slidably arranged in the inner part of the track (902), and the long baffle (9) is fixed on the top of the T-shaped sliding plate (903).

5. The glass coater of claim 4, wherein: A short baffle (901) is arranged on one side of the long baffle (9), an adjusting groove (905) is arranged in the inner part of the short baffle (901), a fixed nut (906) is fixedly arranged on one side of the long baffle (9), and a locking nut (904) is threadedly connected to the outer part of the fixed nut (906).

6. The glass coater of claim 1, wherein: A first flow meter and a first flow adjusting valve are arranged at the top of the first pipe (1b) for controlling the output amount of the first nitrogen.

7. The method of claim 1-6, wherein the method further comprises: Specifically comprising the following steps: S1, the first mixed gas composed of the precursor and the fourth nitrogen is transported from the gas inlet slit (4) to the coating device main body (8); S2, the first mixed gas enters the lower part of the coating device main body (8), the precursor reacts chemically above the glass main body (7), and the solid phase product of the reaction is deposited on the surface of the glass main body (7) to form a thin film; S3, during the formation of the thin film, the first, second and third nitrogen are respectively outputted downward through the first, second and third pipes (1b, 2b and 3b) in the extension mechanism to contact with the first mixed gas; S4, the tail gas, the unreacted precursor and the nitrogen not participating in the reaction are discharged outwardly from the gas outlet slit (6) together; S5, the glass main body (7) after coating passes below the film layer detector, the film layer detector scans transversely and reciprocally above the glass to measure the color and transmittance of the thin film on the glass main body (7); S6, when there is a blockage point in the gas inlet slit (4), the first nitrogen output of the two first holes (1a) closest to the blockage point is reduced through the first flow regulating valve, so that the precursor passing below the first bottom surface (1) reaches uniformity rapidly in the transverse direction.

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