Gradation color cover plate glass silk screen system

Abstract

The application discloses a kind of gradient color cover plate glass silk screen printing systems, belong to glass production technical field.Its technical scheme is: including glass conveying unit one, silk screen printing machine, glass conveying unit two, gradient heating unit, glass conveying unit three, cleaning machine and coating machine arranged in sequence.The application gradually changes by controlling the gradient input amount of oxygen along the color gradient direction, and further precisely controls the temperature of each region, finally prepares the gradient color cover plate glass, and the color CMYK value can be changed between 0,0,0,0 and 71,63,60,12;After placing in the environment of temperature 85 DEG C, humidity 85%RH for 48h, the glass color is stable and does not change.

Description

Technical Field

[0001] This invention relates to the field of glass production technology, and specifically to a gradient color cover glass screen printing system. Background Technology

[0002] Screen printing is a printing method in which ink on a mesh-like screen is forced through its openings onto the substrate. It is one of the four major modern printing methods, along with offset printing, letterpress printing, and gravure printing. Screen printing can directly print on substrates of various sizes and shapes, offering unique expressive effects and a wide range of applications. Substrates include paper, plastics, ceramics, glass, textiles, metal products, wood, leather, and rubber products. A screen printing machine is a machine used to print text and images; it is a general term for machines or equipment used to produce printed materials.

[0003] Screen printing consists of five main elements: a screen, a squeegee, ink, a printing table, and the substrate. It utilizes the basic principle that ink can pass through the mesh openings of the screen in the image areas and not in the non-image areas to print on the substrate. During printing, ink is poured into one end of the screen, and a squeegee applies pressure to the ink areas while moving at a constant speed towards the other end. As it moves, the ink is forced through the mesh openings in the image areas onto the substrate.

[0004] Therefore, when printing color patterns, screen printing often uses overprinting technology, which means printing different colors of ink separately using different screens so that the final product will have multiple colors. However, there is currently no technology to print gradient inks on cover glass, and gradient effects can significantly improve the aesthetics of screen-printed patterns, which has a large market demand. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a gradient color cover glass screen printing system, which controls the gradient amount of oxygen to make it gradually change along the color gradient direction, and further precisely controls the temperature of each area to finally produce gradient color cover glass.

[0006] The technical solution of this invention is as follows:

[0007] The gradient color cover glass screen printing system includes, in sequence, a glass conveying unit 1, a screen printing machine, a glass conveying unit 2, a gradient heating unit, a glass conveying unit 3, a cleaning machine, and a coating machine. The gradient heating unit includes two heating channels arranged side-by-side, each with a valve at both the inlet and outlet. A turning platform is located at the inlet. Two glass conveying mechanisms 1 are arranged side-by-side between the two turning platforms, each carrying a carrier plate on which the glass is placed. Each turning platform includes two spaced-apart transverse belt conveyors, the distance between which is greater than the glass size but less than the carrier plate size. A longitudinal belt conveyor is located in the gap between the transverse belt conveyors. The carrier plate includes a base plate and components arranged around its perimeter. The enclosure has a perforation in the center of the base plate, larger than the glass size. Two glass support mechanisms are respectively located at either end of the perforation on the base plate. Glass support mechanism one includes several fixed blocks arranged along the width of the base plate on the enclosure. Support blocks are hinged to the fixed blocks, and sliders are located below the support blocks. The lower surface of the support block is an inclined plane, with the end furthest from the hinge point higher than the other end. The slider is placed on the base plate and connected to the enclosure by a spring. A stop block is located at the bottom of the slider, and a strip-shaped hole is provided along the length of the base plate corresponding to the stop block, with the stop block extending out of the strip-shaped hole. Glass support mechanism two includes several storage blocks one arranged along the width of the base plate on the enclosure. Each storage block one has a storage groove for storing... A telescopic plate 1 is installed in the storage tank, and the telescopic plate 1 is connected to the storage tank by a spring; several storage blocks 2 are installed on the bottom plate corresponding to one of the storage blocks, and each storage block 2 has a storage tank, in which a telescopic plate 2 is installed, and the telescopic plate 2 is connected to the storage tank by a spring; the telescopic plate 1 is located above the telescopic plate 2 and is connected by a vertical plate, the bottom of the vertical plate extends out of the carrier plate through a perforation, and the vertical plate is offset from the stop block in the glass support mechanism 1, with both ends of the glass placed on the support block and the telescopic plate 1 respectively; support rod 1 and support rod 2 are horizontally installed on the side wall at the entrance end of the heating channel, and support rod 1 and support rod 2 extend into the gap in the middle of the transverse belt conveyor and are located above the longitudinal belt conveyor; the support rod 1 is spaced apart with a number and position corresponding to The baffle plate corresponding to the baffle is provided on the support rod 2, and the number and position of the baffle plate 2 are corresponding to those of the vertical plate. The heating channel is provided with a glass conveying mechanism 2, and the conveying direction of the glass conveying mechanism 2 is parallel to the conveying direction of the longitudinal belt conveyor and perpendicular to the conveying direction of the glass conveying mechanism 1 and the transverse belt conveyor. The heating channel is provided with a nitrogen inlet and an exhaust outlet, and argon pipes and several oxygen pipes and heating pipes are respectively provided on the upper sides of the glass conveying mechanism 2. Several gas outlets are provided at intervals along the length of the argon pipes and oxygen pipes. In the oxygen pipes and argon pipes located on the same side, all oxygen pipes are located on the same side of the argon pipes. Flow meters and solenoid valves are provided on the oxygen pipes and argon pipes.A glass conveying mechanism three is installed at the outlet of the heating channel, and a glass conveying mechanism four is installed between the two glass conveying mechanisms three. The conveying directions of glass conveying mechanisms three and four are perpendicular to the conveying direction of glass conveying mechanism two.

[0008] Preferably, the screen printing machine includes a machine body, a platform is provided on the machine body, a glass conveying mechanism is provided on the platform, a screen fixing mechanism is provided at both ends of the machine body along the glass conveying direction, the two ends of the screen are fixed on the screen fixing mechanism, a lifting mechanism is provided on the screen fixing mechanism, and the lifting mechanism is provided on the machine body; a glue scraper head is provided on the machine body above the screen.

[0009] Preferably, the screen fixing mechanism includes a C-shaped plate, the top of which is threaded with several bolts. After the two ends of the screen are placed in the C-shaped plate, the bolts press against the screen and fix it to the C-shaped plate.

[0010] Preferably, the glass conveying unit one, glass conveying unit two, and glass conveying unit three all include a cylinder, the piston rod of the cylinder is arranged downward and a bracket is connected to the piston rod, a plurality of suction cups are arranged at the bottom of the bracket, a Y-axis moving mechanism is connected to the top of the cylinder, and the Y-axis moving mechanism is connected to an X-axis moving mechanism.

[0011] Preferably, both the X-axis moving mechanism and the Y-axis moving mechanism are lead screws, which are driven by a motor.

[0012] Preferably, a rotary motor is connected to the top of the cylinder, an angle sensor is installed on the output shaft of the rotary motor, and the rotary motor is connected to the Y-axis moving mechanism.

[0013] Preferably, a CCD camera is mounted on the bracket.

[0014] Preferably, the glass conveying mechanism includes a plurality of belt conveyors spaced apart, and a plurality of cylinders are arranged between adjacent belt conveyors. The piston rods of the cylinders face upward and are connected to mounting rods, and casters are mounted on the mounting rods.

[0015] Preferably, the inlet of the cleaning machine is provided with a transition chamber 1, the inlet of the transition chamber 1 is provided with a glass conveying mechanism 6, the transition chamber 1 and the cleaning machine are respectively provided with a glass conveying mechanism 7 and a glass conveying mechanism 8, and both are connected to a vacuum device. The inlet and outlet of the cleaning machine and the transition chamber 1 are provided with gate valves. The cleaning machine is provided with a plasma generator and a process gas pipeline.

[0016] Preferably, the inlet of the coating machine and the outlet of the cleaning machine are adjacent to each other and correspondingly arranged, and a transition chamber 2 is provided at the outlet of the coating machine. A glass conveying mechanism 9 is provided at the outlet of the transition chamber 2. A glass conveying mechanism 10 and a glass conveying mechanism 11 are respectively provided in the coating machine and the transition chamber 2. Both the coating machine and the transition chamber 2 are connected to a vacuum device. A gate valve is provided at the inlet and outlet of both the coating machine and the transition chamber 2. Several cathodes are arranged at intervals along the glass conveying direction inside the coating machine, and a target material is provided on the cathode.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] This invention produces gradient-colored cover glass by controlling the gradient oxygen flow rate, causing it to gradually change along the color gradient direction, and further precisely controlling the temperature of each region. A protective film is then applied to the cover glass surface using magnetron sputtering, improving the mechanical strength and thermal stability of the screen-printed product. This invention's screen-printing system makes the fabrication of gradient-colored cover glass possible, improving the controllability of the process. It allows for control over the rate of color gradient along the length or width of the cover glass during fabrication, enabling CMYK values ​​to vary from 0,0,0,0 to 71,63,60,12. Furthermore, the glass color remains stable and unchanged after being placed in an environment of 85°C and 85% RH for 48 hours. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the gradient color cover glass screen printing system of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of glass conveying unit one, glass conveying unit two, and glass conveying unit three of the present invention.

[0022] Figure 3 This is a schematic diagram of the screen printing machine of the present invention.

[0023] Figure 4 yes Figure 3 A magnified view of a portion at point A.

[0024] Figure 5 This is a schematic diagram showing the position of the upper cylinder of the glass conveying mechanism in the screen printing machine of the present invention.

[0025] Figure 6 yes Figure 5A magnified view of a section at point B.

[0026] Figure 7 This is a schematic diagram of the structure of the steering platform of the present invention.

[0027] Figure 8 This is one of the structural schematic diagrams of the carrier plate of the present invention.

[0028] Figure 9 This is the second schematic diagram of the carrier plate of the present invention.

[0029] Figure 10 This is a schematic diagram of the gradient heating unit of the present invention.

[0030] Figure 11 This is a schematic diagram of the valve structure of the present invention.

[0031] Figure 12 This is a schematic diagram of the glass conveying mechanism three of the present invention.

[0032] Figure 13 This is a structural schematic diagram of the cleaning machine and coating machine of the present invention.

[0033] In the diagram, 1. Glass conveying unit one; 2. Screen printing machine; 201. Machine body; 202. Stage; 203. Glass conveying mechanism five; 204. Screen; 205. Squeegee head; 206. C-shaped plate; 207. Bolt; 208. Crossbar; 209. Connecting frame; 3. Glass conveying unit two; 4. Gradient heating unit; 401. Heating channel; 402. Nitrogen inlet; 403. Exhaust port; 404. Argon pipeline; 405. Oxygen pipeline; 406. Heating tube; 407. Flow meter; 40 8. Solenoid valve; 5. Glass conveying unit three; 6. Cleaning machine; 601. Transition chamber one; 602. Glass conveying mechanism six; 603. Glass conveying mechanism seven; 604. Glass conveying mechanism eight; 605. Plasma generator; 606. Radio frequency power supply; 7. Coating machine; 701. Transition chamber two; 702. Glass conveying mechanism nine; 703. Glass conveying mechanism ten; 704. Glass conveying mechanism eleven; 705. Planar cathode; 706. Rotating cathode one; 707. Rotating cathode two; 708. Target material; 801, bracket; 802, suction cup; 803, X-axis moving mechanism; 804, Y-axis moving mechanism; 805, rotary motor; 806, angle sensor; 807, support frame; 9, turntable; 901, transverse belt conveyor; 902, longitudinal belt conveyor; 10, carrier plate; 1001, base plate; 10011, perforation; 1002, enclosure plate; 10031, fixing block; 10032, supporting block; 10033, slider; 10034, stop block; 10041, storage block one; 1 0042. Telescopic plate one; 10043. Storage block two; 10044. Telescopic plate two; 10045. Upright plate; 1005. Spring; 1006. Support rod one; 10061. Baffle one; 1007. Support rod two; 10071. Baffle two; 1008. Push rod; 11. Door valve; 1101. Door; 1102. Connecting rod; 12. Glass conveying mechanism three; 13. Glass conveying mechanism four; 14. Photoelectric sensor; 15. Cylinder; 16. Mounting rod; 17. Caster wheel; 18. Glass. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0035] Example 1

[0036] like Figure 1As shown, this embodiment provides a gradient color cover glass screen printing system, including a glass conveying unit 1, a screen printing machine 2, a glass conveying unit 2, a gradient heating unit 4, a glass conveying unit 3, a cleaning machine 6, and a coating machine 7 arranged in sequence. The cover glass 18 is screen printed, gradient heated, cleaned, and coated with a protective film through each glass conveying unit.

[0037] Among them, glass conveying unit 1, glass conveying unit 2, and glass conveying unit 3 have the same structure, such as... Figure 2 As shown, each device includes a cylinder 15, with the piston rod of the cylinder 15 facing downwards and a bracket 801 connected to the piston rod. Four suction cups 802 are spaced circumferentially at the bottom of the bracket 801. A Y-axis moving mechanism 804 is connected to the top of the cylinder 15, and an X-axis moving mechanism 803 is connected to the Y-axis moving mechanism 804. Glass conveying units 1, 3, and 5 move above the glass 18 via the X-axis moving mechanism 803 and the Y-axis moving mechanism 804, respectively. Then, the cylinder 15 lowers the bracket 801 until it adheres to the surface of the glass 18 via the suction cups 802. After the bracket 801 is raised, the glass 18 is conveyed to the next moving process via the X-axis moving mechanism 803 and the Y-axis moving mechanism 804. Specifically, in this embodiment, both the X-axis moving mechanism 803 and the Y-axis moving mechanism 804 use lead screws, which are driven by a motor. To increase the stability of the glass conveying unit, as shown... Figure 2 As shown, a support frame 807 is provided on the X-axis moving mechanism 803 to provide support and stability for the glass conveying unit.

[0038] In addition, in order to meet the actual processing requirements of glass 18, such as Figure 2 As shown, a rotary motor 805 can be connected to the top of the cylinder 15. When it is necessary to adjust the orientation of the long side of the glass 18, an angle sensor 806 is installed on the output shaft of the rotary motor 805, and the rotary motor 805 is connected to the Y-axis moving mechanism 804. At this time, the rotary motor 805 can be started as needed, and the glass 18 can be rotated 90° by the control system and the angle sensor 806 to adjust the orientation of the long and short sides, so that it can enter the next process with the correct orientation. In addition, in order to identify the approximate position of the glass 18 and facilitate the suction cup 802 to grasp the glass 18 at the appropriate position, a CCD camera can be installed on the bracket 801.

[0039] In this embodiment, as Figure 3 , 5As shown in Figure 6, the screen printing machine 2 includes a machine body 201, a platform 202 on the machine body 201, and a glass conveying mechanism 203 on the platform 202. The glass conveying mechanism 203 is a belt conveyor. The platform 202 has a groove, and the belt conveyor is located in the groove. A lifting plate is located below the belt conveyor in the groove. At least one I-shaped connecting frame 209 is provided on the lifting plate. The connecting frame 209 spans both ends of the belt conveyor in the width direction, and a cylinder 15 is connected to the connecting frame 209. The piston rod of the cylinder 15 is set downwards, and the cylinder 15 is mounted on the machine body 201. When the glass is conveyed to the screen printing machine 2 by the glass conveying unit 1, it is placed on the belt conveyor for conveying. When the glass 18 is conveyed to a suitable screen printing position above the platform 202, the belt conveyor stops conveying and descends under the action of the cylinder 15 until its top is level with the platform 202. Then, the screen printing process on the glass 18 can begin.

[0040] The screen printing machine 2 has screen fixing mechanisms at both ends of its body 201 along the conveying direction of the glass 18. The two ends of the screen 204 are fixed to these screen fixing mechanisms. Specifically, as shown... Figure 3-4 As shown, the screen fixing mechanism includes a C-shaped plate 206, with several bolts 207 threadedly connected to the top of the C-shaped plate 206. After both ends of the screen 204 are placed in the C-shaped plate 206, the bolts 207 abut against the screen 204, fixing it to the C-shaped plate 206. The screen fixing mechanism is equipped with a lifting mechanism, such as... Figure 4 As shown, the lifting mechanism includes a crossbar 208 fixed to the back of the C-shaped plate 206, and cylinders 15 are respectively installed on both ends of the crossbar 208 on the machine body 201. The piston rods of the cylinders 15 face upward and are connected to the crossbar 208; Figure 3 As shown, a squeegee head 205 is installed on the machine body 201 above the screen 204. This squeegee head 205 is a component of the existing screen printing machine 2, and its specific structure will not be described in detail here. After the screen 204 is manually fixed on the screen fixing mechanism, the cylinder 15 drives the screen 204 to descend to the upper surface of the glass 18. Then, the squeegee head 205 screen prints ink on the glass 18, transferring the ink on the screen 204 through the screen mesh onto the glass 18.

[0041] After screen printing is completed, cylinder 15 drives the belt conveyor to rise and starts the belt conveyor to transport glass 18 out of screen printing machine 2. Then, it is transported through glass conveying unit 3 to gradient heating unit 4 for gradient heating treatment. Specifically, as shown... Figure 10 As shown, in this embodiment, the gradient heating unit 4 includes two heating channels 401 arranged side by side, separated by insulating rock wool. A valve 11 is provided at both the inlet and outlet of each heating channel 401 to allow for opening and closing of the channel. Specifically, as... Figure 11As shown, the valve 11 includes a door 1101 hinged at the top to the inlet and outlet. Cylinders 15 are hinged to both sides of the inlet and outlet, respectively. A connecting rod 1102 is hinged to the piston rod of the cylinder 15, and the connecting rod 1102 is hinged to the side of the door 1101. The extension and retraction of the piston rod of the cylinder 15 drives the connecting rod 1102 to push the door 1101 away from or cover the inlet or outlet, thereby opening or closing the inlet or outlet of the heating channel 401.

[0042] In addition, such as Figure 10 As shown, a turning platform 9 is provided at the entrance of the heating channel 401. Two glass conveying mechanisms are arranged side-by-side between the two turning platforms 9. These glass conveying mechanisms utilize belt conveyors, and a carrier plate 10 is placed on the glass conveying mechanism 1, with the glass 18 placed on the carrier plate 10. Specifically, as... Figure 7 As shown, the turntable 9 includes two spaced-apart transverse conveyor belts 901. The distance between the two transverse conveyor belts 901 is greater than the size of the glass 18 but less than the size of the carrier plate 10. A longitudinal conveyor belt 902 is disposed in the gap between the transverse conveyor belts 901. Figure 8-9As shown, the carrier plate 10 includes a base plate 1001 and a surrounding plate 1002 arranged around the base plate 1001. A through hole 10011 is provided in the middle of the base plate 1001, and the through hole 10011 is larger than the size of the glass 18. A glass support mechanism one and a glass support mechanism two are respectively provided on the base plate 1001 at both ends of the through hole 10011. The glass support mechanism one includes a plurality of fixing blocks 10031 arranged on the surrounding plate 1002 along the width direction of the base plate 1001. A bearing is hinged on the fixing block 10031. The support block 10032 has a slider 10033 below it. The lower surface of the support block 10032 is an inclined surface, and the end away from the hinge end is higher than the other end. The slider 10033 is placed on the base plate 1001 and connected to the surrounding plate 1002 by the spring 1005. The bottom of the slider 10033 is provided with a stop block 10034. The base plate 1001 has a strip hole along the length of the base plate 1001 corresponding to the stop block 10034. The stop block 10034 extends out of the strip hole. The second glass support mechanism includes several storage blocks 10041 arranged on the side panel 1002 along the width direction of the base plate 1001. Each storage block 10041 has a storage groove, and a telescopic plate 10042 is arranged in the storage groove. The telescopic plate 10042 is connected to the storage groove by a spring 1005. Several storage blocks 10043 are arranged on the base plate 1001 corresponding to the storage blocks 10041. Each storage block 10043 has a storage groove, and a telescopic plate 10042 is arranged in the storage groove. A second telescopic plate 10044 is provided, which is connected to the storage slot by a spring 1005; a first telescopic plate 10042 is located above the second telescopic plate 10044 and is connected by a vertical plate 10045. The bottom of the vertical plate 10045 extends out of the carrier plate 10 through a perforation 10011, and the vertical plate 10045 is offset from the stop block 10034 in the first glass support mechanism. The two ends of the glass 18 are respectively placed on the support block 10032 and the first telescopic plate 10042. Figure 4 As shown, support rod 1006 and support rod 2 1007 are horizontally arranged on the side wall of the inlet end of the heating channel 401. Support rod 1006 and support rod 2 1007 extend into the gap in the middle of the transverse belt conveyor 901 and are located above the longitudinal belt conveyor 902. Support rod 1006 is provided with baffle 10061 at intervals, the number and position of which correspond to the stop block 10034. Support rod 2 1007 is provided with baffle 2 10071 at intervals, the number and position of which correspond to the vertical plate 10045.

[0043] Glass conveying unit 2 3 conveys glass 18 to one of the carrier plates 10 on the belt conveyor at the entrance of heating channel 401, and then conveys it to the corresponding turning table 9 via the belt conveyor. At this time, the carrier plate 10 is conveyed laterally on the transverse belt conveyor 901 until the baffles 10061 and 10071 on the support rod 1006 and support rod 2 1007 in the middle gap of the transverse belt conveyor 901 abut against the stop block 10034 of glass support mechanism 1 and the upright plate 10045 of glass support mechanism 2 and continues to convey, so that the stop block 10034 and the upright plate 10045 are respectively at the baffle 10061 and baffle 2 10071. Under the action of 0071, the slider 10033 is pushed, causing it to slide from the hinged end to the other end below the support block 10032. This causes the support block 10032 to tilt downwards, allowing that end of the glass 18 to slide off the support block 10032. Simultaneously, the telescopic plate 10042 and the telescopic plate 10044 are also pushed into the receiving slot and receiving slot, causing the edge of the glass 18 placed on the telescopic plate 10042 to fall downwards. Finally, the glass 18 falls through the perforation 10011 on the bottom plate 1001 onto the longitudinal conveyor 902 below, and is then conveyed to the heating channel 401 by the longitudinal conveyor 902. To ensure that the edge of the glass 18 falls smoothly off the telescopic plate 10042, such as... Figure 9 As shown, a push rod 1008 can be installed on the enclosure 1002 above the storage block 10041. When the telescopic plate 10042 and the telescopic plate 2 10044 extend into the storage slot, if the edge of the glass 18 moves with the telescopic plate 10042, it will stop moving under the action of the push rod 1008 and eventually fall smoothly onto the longitudinal conveyor belt 902 below. After the glass 18 falls from the carrier plate 10 onto the longitudinal conveyor belt 902, the slider 10033, the telescopic plate 10042 and the telescopic plate 2 10044 will return to their original positions under the action of the spring 1005, and the carrier plate 10 will also be conveyed to the glass conveying mechanism 1. In addition, in order to ensure that the carrier plate 10 returns to the appropriate position of the glass conveying mechanism 1, photoelectric sensors 14 can be installed at both ends of the conveying direction of the glass conveying mechanism 1. When the photoelectric sensors 14 detect both ends of the glass 18, it means that the carrier plate 10 has returned to its original position.

[0044] like Figure 10As shown, a second glass conveying mechanism is provided in the heating channel 401. The conveying direction of the second glass conveying mechanism is parallel to the conveying direction of the longitudinal belt conveyor 902 and perpendicular to the conveying directions of the first glass conveying mechanism and the transverse belt conveyor 901. The second glass conveying mechanism is a belt conveyor. A nitrogen inlet 402 and an exhaust port 403 are provided on the heating channel 401 to replace the air in the heating channel 401 with nitrogen. Argon pipes 404, two oxygen pipes 405, and three heating tubes 406 are respectively provided on the upper sides of the second glass conveying mechanism. An exhaust port is provided every 30 cm along the length of the argon pipes 404 and 405. All oxygen pipes 405 are located on the same side of the argon pipes 404. Flow meters 407 and solenoid valves 408 are provided on the oxygen pipes 405 and argon pipes 404. Before heating the glass, nitrogen gas is introduced into the heating channel 401 to replace the air. Then, the solenoid valves 408 of the oxygen pipes 405 and argon pipes 404 on both sides of the glass conveying mechanism are opened, and the gas flow rate in each pipe is controlled by the flow meter 407. When a gradient color effect is desired, the flow rates of the oxygen pipes 405 on the same side of the glass 18 can be set differently and coordinated with the argon pipe 404 to create a gradient trend in oxygen flow along the width of the heating channel 401. The higher the oxygen content, the darker the ink color. Where argon gas is introduced, the oxygen content is lowest, and the argon gas acts as a protective agent, preventing color change in that area. Simultaneously, heating tubes 406 can be activated as needed. Three heating tubes 406 are positioned on one side of the oxygen pipes 405, between the oxygen pipes 405, and between the oxygen pipes 405 and the argon pipe 404. According to the requirements of the ink color gradient design, the temperatures of the three heating tubes 406 are also designed to change in a gradient; the higher the heating temperature, the darker the color.

[0045] like Figure 10 As shown, a photoelectric sensor 14 is installed inside the heating channel 401 at the outlet; a glass conveying mechanism three 12 is installed outside the heating channel 401 at the outlet, and a glass conveying mechanism four 13 is installed between the two glass conveying mechanisms three 12. The conveying directions of the glass conveying mechanisms three 12 and four 13 are perpendicular to the conveying direction of the glass conveying mechanism two. Both the glass conveying mechanisms three 12 and four 13 include several belt conveyors spaced apart, such as... Figure 12As shown, in the glass conveying mechanism 3 12, several cylinders 15 are arranged between adjacent belt conveyors. The piston rod of the cylinder 15 faces upward and is connected to the mounting rod 16, on which a universal wheel 17 is mounted. After gradient heating is completed, when the photoelectric sensor 14 senses the glass 18, the outlet valve 11 opens, and the glass 18 is conveyed to the universal wheel 17 above the glass conveying mechanism 3 12. Then, the cylinder 15 drives the universal wheel 17 to descend below the belt conveyor, transferring the glass 18 to the belt conveyor of the glass conveying mechanism 3 12, and finally conveying it to the belt conveyor of the middle glass conveying mechanism 4 13, waiting for the glass conveying unit 3 5 to convey it to the next process.

[0046] like Figure 13 As shown, a transition chamber 601 is provided at the inlet of the cleaning machine 6. A glass conveying mechanism 602 is provided at the inlet of the transition chamber 601. A glass conveying mechanism 603 and a glass conveying mechanism 604 are respectively provided in the transition chamber 601 and the cleaning machine 6, and all are connected to a vacuum device. The glass conveying mechanisms 602, 603, and 604 can all be roller conveyors. A gate valve 11 is provided at the inlet and outlet of the cleaning machine 6 and the transition chamber 601. The structure of the gate valve 11 is the same as described above and will not be repeated here. A plasma generator 605 and a process gas pipeline are provided inside the cleaning machine 6. Argon gas can be introduced into the process gas pipeline. The plasma generator 605 is connected to a radio frequency power supply 606. In this embodiment, the cleaning machine 6 is used to perform plasma cleaning on the glass 18. After baking, a layer of dust particles will be attached to the surface of the glass 18. The radio frequency power supply 606 generates high-energy disordered plasma under certain pressure, and the dust on the surface of the glass 18 is cleaned away by plasma cleaning.

[0047] After cleaning, the glass 18 enters the subsequent coating process, including, for example... Figure 13As shown, the inlet of the coating machine 7 and the outlet of the cleaning machine 6 are adjacent to each other and correspondingly arranged. A transition chamber 701 is provided at the outlet of the coating machine 7. A glass conveying mechanism 702 is provided at the outlet of the transition chamber 701. A glass conveying mechanism 703 and a glass conveying mechanism 704 are respectively provided in the coating machine 7 and the transition chamber 701. All three glass conveying mechanisms can be roller conveyors. Both the coating machine 7 and the transition chamber 701 are connected to a vacuum device. A valve 11 is provided at the inlet and outlet of both the coating machine 7 and the transition chamber 701. The structure of the valve 11 is the same as described above and will not be repeated here. Inside the coating machine 7, along the conveying direction of the glass 18, there are three spaced-apart planar cathodes 705, rotating cathode one 706, and rotating cathode two 707. Planar cathode 705 is fitted with a nickel-chromium target 708, rotating cathode one 706 with a silicon target 708, and rotating cathode two 707 with a silicon-aluminum target 708. Gas pipes are installed at each of the planar cathode 705, rotating cathode one 706, and rotating cathode two 707. Through magnetron sputtering, a 2-5 nm nickel-chromium layer, a 20-50 nm silicon nitride layer, and a 30-60 nm silicon-aluminum nitride layer are sequentially deposited on the glass surface to protect the gradient glass 18 and prevent fading of the ink after prolonged exposure.

[0048] Taking the requirement that the left side of the cover glass 18 has a CMYK value of 71,63,60,12 and the right side has a CMYK value of 0,0,0,0 as an example, the process flow for preparing the gradient cover glass 18 using the system in this embodiment is as follows: cleaning → screen printing → gradient heating → plasma cleaning → coating → unloading. Specifically:

[0049] Cleaning is performed using a Benteler cleaning machine. The process involves pre-spraying, detergent brushing, followed by pure water rinsing, and then air drying with an air knife to remove oil and dust from the glass 18 surface. This increases the surface activity of the glass 18, resulting in stronger adhesion of screen printing inks. Specific equipment parameters are as follows: pre-spray water temperature 25℃, spray pressure 1.5 kg / cm². 2 The soaking temperature is 50℃, the detergent washing temperature is 45℃, the pure water washing temperature is 40℃, the brush rotation speed is 300rpm, the conveying speed is 1.8m / min, and the air knife pressure in the drying section is 11Kpa.

[0050] After cleaning, the glass 18 enters the screen printing machine 2 through the glass conveying unit 1, allowing the mirror silver ink to be transferred to the surface of the glass 18 through the screen 204, forming a pattern on the surface of the glass 18. The pattern has a uniform color and presents an overall mirror finish. The screen printing speed is 200mm / s, the ink return speed is 300mm / s, the squeegee angle is 80°, and the screen printing mirror silver ink ratio is 100g of MIR-HF 51000 mirror silver, 2g of curing agent 201, and 1g of GLS glass reinforcing agent.

[0051] The screen-printed glass 18 enters the gradient heating unit 4 via glass transfer unit 3. Within the heating channel 401, only one side of the oxygen pipe 405 and heating tube 406 are open. The nitrogen purity is 99.9%, and the nitrogen flow rate is 450 L / min. The temperatures of the three heating tubes 406 are 170℃, 130℃, and 80℃, respectively. The flow rates of the two oxygen pipes 405 are 1000 sccm and 500 sccm, respectively, and the flow rate of the argon pipe 404 is 500 sccm. In the gradient heating unit 4, the left side of the glass 18 has a darker color, requiring an increase in the non-metallic component of the ink. This allows more metallic Ag particles to be converted into non-metallic AgO particles in a high-temperature and high-oxygen-concentration environment. After gradient heating, the glass 18 enters the plasma cleaning machine 6 via glass transfer unit 3. The plasma generator 605 has an RF current of 10A and a voltage of 1000V. After plasma cleaning, the glass 18 enters the coating machine 7. During the coating process, when depositing a 5nm nickel-chromium layer, the power supply is 50kW, the voltage is 500V, and the vacuum degree is 1×10⁻⁶. -3 mbar, argon flow rate of 1000 sccm; when depositing a 20 nm silicon nitride layer, the power supply is 10 kW, the voltage is 600 V, and the vacuum degree is 1 × 10⁻⁶ mbar. -3 mbar, nitrogen flow rate 700 sccm, argon flow rate 1000 sccm; when depositing a 30 nm silicon nitride aluminum layer, the power supply is 15 kW, the voltage is 600 V, and the vacuum degree is 1 × 10⁻⁶ mbar. -3 mbar, nitrogen flow rate is 700 sccm, argon flow rate is 1000 sccm.

[0052] Weather resistance tests were conducted on the gradient cover glass 18 product prepared in this embodiment and ordinary commercially available products. The test results are shown in Table 1.

[0053] Table 1

[0054]

[0055] As shown in Table 1, the gradient cover glass 18 produced by the present invention has high hardness and good weather resistance. During the handling of the cover glass 18, the high hardness can prevent the generation of ink scratches. In the event of an impact, the high hardness can also reduce the generation of ink light transmission points. The excellent weather resistance can ensure that the ink will not fade after years of use.

Claims

1. A gradient color cover glass screen printing system, characterized in that, It includes a glass conveying unit 1 (1), a screen printing machine (2), a glass conveying unit 2 (3), a gradient heating unit (4), a glass conveying unit 3 (5), a cleaning machine (6), and a coating machine (7) arranged in sequence; The gradient heating unit (4) includes two heating channels (401) arranged side by side. A valve (11) is provided at the entrance and exit of the heating channel (401), and a turning platform (9) is provided at the entrance. Two glass conveying mechanisms are arranged side by side between the two turning platforms (9). A carrier plate (10) is placed on the glass conveying mechanism, and the glass (18) is placed on the carrier plate (10). The turning platform (9) includes two transverse belt conveyors (901) arranged at intervals. The distance between the two transverse belt conveyors (901) is greater than the size of the glass (18) and less than the size of the carrier plate (10). A longitudinal belt conveyor (902) is arranged in the gap between the transverse belt conveyors (901). The carrier plate (10) includes a base plate (1001) and a surrounding plate (1002) arranged around the base plate (1001). A perforation (10011) is provided in the middle of the base plate (1001), which is larger than the size of the glass (18). A glass support mechanism one and a glass support mechanism two are respectively provided on the base plate (1001) at both ends of the perforation (10011). The glass support mechanism one includes a plurality of fixing blocks (10031) arranged on the surrounding plate (1002) along the width direction of the base plate (1001). The fixing blocks (10031) are hinged. A support block (10032) is attached, and a slider (10033) is provided below the support block (10032). The lower surface of the support block (10032) is an inclined plane, with one end away from the hinge end higher than the other end. The slider (10033) is placed on the base plate (1001) and connected to the surrounding plate (1002) by a spring (1005). A stop block (10034) is provided at the bottom of the slider (10033). A strip hole is provided on the base plate (1001) along the length direction of the base plate (1001) at the position corresponding to the stop block (10034). 34) Extending strip-shaped hole; the glass support mechanism two includes several storage blocks one (10041) arranged on the surrounding plate (1002) along the width direction of the bottom plate (1001), the storage blocks one (10041) are provided with storage grooves, and telescopic plates one (10042) are provided in the storage grooves, the telescopic plates one (10042) are connected to the storage grooves by springs (1005); several storage blocks two (10043) are arranged on the bottom plate (1001) corresponding to the storage blocks one (10041), the storage blocks two (10043) are provided with storage grooves, and the storage grooves are provided with storage grooves. A second telescopic plate (10044) is provided, which is connected to the storage slot by a spring (1005); a first telescopic plate (10042) is located above the second telescopic plate (10044) and is connected by a vertical plate (10045). The bottom of the vertical plate (10045) extends out of the carrier plate (10) through a perforation (10011), and the vertical plate (10045) is offset from the stop block (10034) in the first glass support mechanism. The two ends of the glass (18) are respectively placed on the support block (10032) and the first telescopic plate (10042); Support rod 1 (1006) and support rod 2 (1007) are horizontally arranged on the side wall of the inlet end of the heating channel (401). Support rod 1 (1006) and support rod 2 (1007) extend into the gap in the middle of the transverse belt conveyor (901) and are located above the longitudinal belt conveyor (902). Support rod 1 (1006) is provided with baffle 1 (10061) at intervals, the number and position of which correspond to the stop block (10034). Support rod 2 (1007) is provided with baffle 2 (10071) at intervals, the number and position of which correspond to the vertical plate (10045). The heating channel (401) is equipped with a second glass conveying mechanism, the conveying direction of which is parallel to the conveying direction of the longitudinal belt conveyor (902) and perpendicular to the conveying directions of the first glass conveying mechanism and the transverse belt conveyor (901); the heating channel (401) is equipped with a nitrogen inlet (402) and an exhaust port (403), and argon pipes (404) and several oxygen pipes (405) and heating pipes (406) are respectively arranged above both sides of the second glass conveying mechanism. Several gas outlets are arranged at intervals along the length of the argon pipes (404) and oxygen pipes (405). In the oxygen pipeline (405) and argon pipeline (404) located on the same side, all oxygen pipelines (405) are located on the same side of argon pipeline (404). Flow meters (407) and solenoid valves (408) are installed on the oxygen pipelines (405) and argon pipelines (404). A glass conveying mechanism three (12) is installed at the outlet of the heating channel (401). A glass conveying mechanism four (13) is installed between the two glass conveying mechanisms three (12). The conveying direction of glass conveying mechanism three (12) and glass conveying mechanism four (13) is perpendicular to the conveying direction of glass conveying mechanism two.

2. The gradient color cover glass screen printing system as described in claim 1, characterized in that, The screen printing machine (2) includes a machine body (201), a platform (202) is provided on the machine body (201), a glass conveying mechanism (203) is provided on the platform (202), a screen fixing mechanism is provided at both ends of the machine body (201) along the glass conveying direction, the two ends of the screen (204) are fixed on the screen fixing mechanism, a lifting mechanism is provided on the screen fixing mechanism, and the lifting mechanism is provided on the machine body (201); a glue scraper head (205) is provided on the machine body (201) above the screen (204).

3. The gradient color cover glass screen printing system as described in claim 2, characterized in that, The screen fixing mechanism includes a C-shaped plate (206), and a number of bolts (207) are threadedly connected to the top of the C-shaped plate (206). After the two ends of the screen (204) are placed in the C-shaped plate (206), the bolts (207) abut against the screen (204) and fix it to the C-shaped plate (206).

4. The gradient color cover glass screen printing system as described in claim 1, characterized in that, The glass conveying unit 1 (1), glass conveying unit 2 (3) and glass conveying unit 3 (5) all include a cylinder (15). The piston rod of the cylinder (15) is set downward and a bracket (801) is connected to the piston rod. Several suction cups (802) are set at the bottom of the bracket (801). A Y-axis moving mechanism (804) is connected to the top of the cylinder (15). The Y-axis moving mechanism (804) is connected to an X-axis moving mechanism (803).

5. The gradient color cover glass screen printing system as described in claim 4, characterized in that, Both the X-axis moving mechanism (803) and the Y-axis moving mechanism (804) adopt lead screws, which are driven by motors.

6. The gradient color cover glass screen printing system as described in claim 4, characterized in that, The cylinder (15) is connected to a rotary motor (805) at the top. An angle sensor (806) is installed on the output shaft of the rotary motor (805). The rotary motor (805) is connected to the Y-axis moving mechanism (804).

7. The gradient color cover glass screen printing system as described in claim 4, characterized in that, A CCD camera is mounted on the bracket (801).

8. The gradient color cover glass screen printing system as described in claim 1, characterized in that, The glass conveying mechanism three (12) includes several belt conveyors spaced apart, and several cylinders (15) are arranged between adjacent belt conveyors. The piston rod of the cylinder (15) faces upward and is connected to the mounting rod (16). A universal wheel (17) is installed on the mounting rod (16).

9. The gradient color cover glass screen printing system as described in claim 1, characterized in that, The cleaning machine (6) is provided with a transition chamber 1 (601) at its inlet. A glass conveying mechanism 6 (602) is provided at the inlet of the transition chamber 1 (601). A glass conveying mechanism 7 (603) and a glass conveying mechanism 8 (604) are respectively provided in the transition chamber 1 (601) and the cleaning machine (6), and both are connected to a vacuum device. A valve (11) is provided at the inlet and outlet of the cleaning machine (6) and the transition chamber 1 (601). A plasma generator (605) and a process gas pipeline are provided inside the cleaning machine (6).

10. The gradient color cover glass screen printing system as described in claim 9, characterized in that, The inlet of the coating machine (7) is adjacent to and corresponding to the outlet of the cleaning machine (6), and a transition chamber 2 (701) is provided at the outlet of the coating machine (7). A glass conveying mechanism 9 (702) is provided at the outlet of the transition chamber 2 (701). A glass conveying mechanism 10 (703) and a glass conveying mechanism 11 (704) are respectively provided in the coating machine (7) and the transition chamber 2 (701). Both the coating machine (7) and the transition chamber 2 (701) are connected to a vacuum device. A gate valve (11) is provided at the inlet and outlet of the coating machine (7) and the transition chamber 2 (701). Several cathodes are arranged at intervals along the glass conveying direction in the coating machine (7), and a target material (708) is provided on the cathode.

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