A folding cover plate manufacturing system for a display screen

Abstract

The application discloses a folding cover plate manufacturing system for display screens, which comprises a printing unit, a die-cutting unit, a detection unit, a laser processing unit and a laminating unit, the printing unit is used for printing an ink frame on a substrate, the die-cuting unit is used for rolling and pasting an OCA adhesive layer on the substrate and die-cutting to obtain a substrate, the detection unit is used for detecting whether the substrate has defects, the laser processing unit is used for laser processing the substrate, and the laminating unit is used for laminating a functional layer on the substrate; the detection unit comprises a first box body which is penetrated from both sides, a detection mechanism is arranged in the first box body, the detection mechanism comprises a movable shaft which is movably connected between the inner side walls of the first box body, a contact plate is connected to the lower end of the movable shaft, the contact plate is arranged to be inclined towards the conveying line, the contact plate is used for contacting the top surface of the substrate on the conveying line, a synchronous rod is connected to the top of the movable shaft in a radial direction, a pull wire is connected to the top of the synchronous rod, and a triggering mechanism is connected to the pull wire, and the application has the advantages of improving production efficiency and reducing cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display screen manufacturing, in particular to a folding cover plate manufacturing system for display screen. BACKGROUND

[0002] The cover plate refers to a transparent lens used to protect the touch module of the touch display screen and the non-touch screen, which is used to be attached outside the electronic display screen. The cover plate substrate is constantly adapting to the development of related display screens to achieve better light transmission, stability, hardness requirements, and also to ensure that the display screen is safer and smoother to use. The flexible cover plate is the core material of the folding phone, and to fully realize flexible display, the display cover plate part should have the characteristics of repeated bending, transparency, ultra-thinness, and sufficient hardness.

[0003] In the manufacturing production line of the folding cover plate, the processes of printing, drying, product yield quality inspection, die cutting, product yield quality inspection, laser processing and bonding need to be carried out in turn. In the quality inspection link, the product processing quality after the corresponding process step is generally detected by combining machine vision recognition technology (i.e. using a CCD camera). However, the machine vision recognition process requires a certain time to process image data. Therefore, when the product is passing through the detection station on the conveying line, the conveying speed needs to be reduced or stopped to match the detection period, so as to screen out products with substandard yield. If the conveying speed is reduced every time the detection is carried out, the working efficiency of the entire production line will be affected. SUMMARY

[0004] The main purpose of the present application is to provide a folding cover plate manufacturing system for display screen, which aims to solve the technical problem of low working efficiency of the existing folding cover plate manufacturing production line.

[0005] To achieve the above-mentioned purpose, the present application provides a folding cover plate manufacturing system for display screen, which comprises a printing unit, a die cutting unit, a detection unit, a laser processing unit and a bonding unit connected in turn through a conveying line. The printing unit is used to print an ink frame on the substrate. The die cutting unit is used to roll and paste an OCA adhesive layer on the printed substrate and perform overall die cutting to obtain a substrate. The detection unit is used to detect whether the substrate has warping and / or bubble defects. The laser processing unit is used to perform laser processing on the substrate. The bonding unit is used to bond a functional layer on the laser-processed substrate. The detection unit comprises a first box body with through holes on both sides. A detection mechanism is arranged in the first box body. The detection mechanism comprises a movable shaft movably connected between the inner side walls of the first box body. The lower end of the movable shaft is connected with a contact plate. The contact plate is arranged obliquely towards the conveying line. The contact plate is used to contact the top surface of the substrate on the conveying line. A synchronous rod is connected to the top of the movable shaft in a radial direction. The top of the synchronous rod is connected with a pull wire. The pull wire is connected with a trigger mechanism.

[0006] Optionally, the triggering mechanism comprises a slider connected with the pull wire, the slider is slidingly connected with the inner top of the first box through a sliding rail, the sliding direction of the slider is parallel to the conveying direction of the conveying line, one side of the slider close to the synchronous rod is connected with a first spring, the other end of the first spring is connected with a pressure sensor arranged on the inner top of the first box.

[0007] Optionally, the contact plate comprises a movable plate connected with the lower end of the movable shaft, the movable plate is movably connected with a hollow cylinder in contact with the top surface of the substrate.

[0008] Optionally, the pressure sensor is electrically connected with a controller, the controller is electrically connected with a flattening mechanism, the detection mechanism and the flattening mechanism are arranged in sequence along the conveying line, the flattening mechanism comprises a first telescopic cylinder arranged on the top of the first box, the bottom of the first telescopic cylinder is connected with a connecting frame located in the first box, the bottom of the connecting frame is movably connected with a rotating stick, the outer side wall of the connecting frame is provided with a first motor for driving the rotating stick, the first motor and the first telescopic cylinder are electrically connected with the controller, a plurality of flexible flattening components arranged in a ring array around the axis of the rotating stick are arranged on the rotating stick, the flexible flattening components are used for flattening the warping and / or bubbles on the substrate.

[0009] Optionally, the flexible flattening component comprises a connecting plate connected with the rotating stick, a guide groove penetrating through the end of the connecting plate is formed in the connecting plate, a second spring is connected in the guide groove, the second spring is connected with a telescopic plate, the end of the telescopic plate extending out of the guide groove is movably connected with a pressure roller, the pressure roller is used for flattening the warping and / or bubbles on the substrate.

[0010] Optionally, the controller is built-in with a regulation and control module, the regulation and control module is used for controlling the coordinated operation of each component of the printing unit, a preset regulation and control model is stored in the regulation and control module, the expression of the regulation and control model is:

[0011] Q=K1·(F / σ) +K2·tanθ +K3 / V+ K4·logH + K5·ΔT;

[0012] ΔT<α·δ / ε;

[0013] In the formula, Q is the target printing precision, K1 is the first empirical coefficient, K2 is the second empirical coefficient, K3 is the third empirical coefficient, K4 is the fourth empirical coefficient, K5 is the fifth empirical coefficient, F is the screen tension, σ is the surface energy of the substrate, θ is the doctor blade angle, V is the printing speed, H is the doctor blade hardness, ΔT is the step curing temperature, α is the thermal expansion coefficient of the substrate, δ is the ink frame layer thickness, and ε is the thermal strain threshold; wherein the screen tension F and the printing speed V are negatively associated, and the doctor blade hardness H and the doctor blade angle θ are negatively associated.

[0014] Optionally, the laminating unit comprises a second box body, a grabbing mechanism is arranged on the top of the second box body and used for grabbing the substrate, a laminating mechanism is arranged on the inner bottom of the second box body and used for laminating the functional layer on the bottom surface of the substrate, a sliding groove is arranged on the top of the second box body, the grabbing mechanism is slidably connected in the sliding groove through a sliding rail, the second box body is provided with a second telescopic cylinder connected with the grabbing mechanism, and the second telescopic cylinder is used for driving the grabbing mechanism to slide to above the laminating mechanism.

[0015] Optionally, the laminating mechanism comprises a third telescopic cylinder arranged on the inner bottom of the second box body, a frame is arranged on the top of the third telescopic cylinder, the top of the frame is used for supporting the functional layer, the frame is used for pressing the middle area of the functional layer to the middle area of the bottom surface of the substrate, a lifting assembly is arranged in the frame, supports are hingedly connected on both sides of the lifting assembly through spring hinges, the two supports are symmetrically arranged on both sides of the frame, a pressing wheel is movably connected on the top of each support, and the pressing wheels are used for pressing the functional layer to the bottom surface of the substrate.

[0016] Optionally, the lifting assembly comprises a second motor arranged on the inner top of the frame, the second motor is connected with a lifting lead screw, the bottom of the lifting lead screw is movably connected to the inner bottom of the frame through a bearing, a nut seat is threadedly sleeved on the lifting lead screw, the two supports are hingedly connected on both sides of the nut seat through spring hinges, and a guide vertical rod is fixedly arranged in the frame and movably penetrates through the nut seat.

[0017] Optionally, the grabbing mechanism comprises a mold base slidably connected in the sliding groove, a forming cavity matched with the substrate is arranged on the bottom of the mold base, a movable cavity independent of the forming cavity is arranged in the mold base, a lifting plate is arranged in the movable cavity, a fourth telescopic cylinder is arranged on the top of the mold base and connected with the top of the lifting plate, a plurality of vacuum pipes are arranged on the lifting plate and movably penetrate through the top and the bottom of the mold base, vacuum suction cups for sucking the substrate are connected with the bottom of the vacuum pipes, and a blind hole for accommodating the vacuum suction cups is arranged on the top of the forming cavity.

[0018] The application can achieve the following beneficial effects:

[0019] When the substrate enters the detection link, the substrate moves to the first box through the conveying line, and when passing through the detection mechanism, if the substrate has obvious bubbles or warping, the top surface of the substrate will form a protrusion. At this time, the protruding part of the substrate can drive the contact plate to rotate a certain angle when passing through the inclined contact plate, and the movable shaft also rotates a certain angle. Since there may be a case where the protrusion height is low, the rotation angle of the movable shaft will be relatively small, and it is difficult to accurately detect the angle change through a general sensor. Therefore, the rotation arc of the movable shaft is amplified through the synchronous rod connected to the movable shaft. When the synchronous rod rotates at a large arc, the pull line can be obviously pulled, thereby driving the trigger mechanism to operate, that is, the protrusion defects such as bubbles or warping of the substrate are detected. Since the detection mechanism based on mechanical triggering of the present application can quickly and accurately detect the protrusion defects of the substrate online, the time for waiting for the detection result is saved, so that the conveying line does not need to slow down or stop when the substrate passes through the detection unit, and the normal speed conveying can be maintained, thereby improving the detection efficiency, that is, improving the working efficiency of the production line, and expensive machine vision recognition equipment can be saved, and the equipment cost is also reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0021] Figure 1 A frame schematic diagram of a folding cover plate manufacturing system for a display screen in an embodiment of the present application;

[0022] Figure 2 An internal structure schematic diagram of a detection unit in an embodiment of the present application;

[0023] Figure 3 A Figure 2 A partial enlarged structure schematic diagram of A in FIG. 5;

[0024] Figure 4 A structure schematic diagram of a contact plate in an embodiment of the present application;

[0025] Figure 5 A structure schematic diagram of a flexible flattening assembly in an embodiment of the present application;

[0026] Figure 6 An internal structure schematic diagram of a lamination unit in an embodiment of the present application;

[0027] Figure 7Structure schematic diagram of the fitting mechanism in the embodiment of the present application;

[0028] Figure 8 Structure schematic diagram of the fitting unit fitting the functional layer on the bottom surface of the substrate in the embodiment of the present application.

[0029] Reference signs:

[0030] 100-printing unit, 200-die-cutting unit, 300-detecting unit, 310-first box body, 320-detecting mechanism, 321-moving shaft, 322-contact plate, 3221-moving plate, 3222-hollow cylinder, 323-synchronous rod, 324-pull wire, 325-triggering mechanism, 3251-sliding block, 3252-first spring, 3253-pressure sensor, 330-controller, 340-flattening mechanism, 341-first telescopic cylinder, 342-connecting frame, 343-rotating stick, 344-first motor, 345-flexible flattening assembly, 3451-connecting plate, 3452-second spring, 3453-telescopic plate, 3454-pressing roller, 400-laser processing unit, 500-fitting unit, 510-second box body, 511-slotted guide, 520-grasping mechanism, 521-mold base, 5211-molding cavity, 5212-moving cavity, 5213-blind hole, 522-lifting plate, 523-fourth telescopic cylinder, 524-vacuum pipe, 525-vacuum chuck, 530-fitting mechanism, 531-third telescopic cylinder, 532-frame, 533-lifting assembly, 5331-second motor, 5332-lifting lead screw, 5333-nut seat, 5334-guiding vertical rod, 534-bracket, 535-pressing wheel, 540-second telescopic cylinder, 600-substrate, 700-functional layer.

[0031] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0034] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In addition, if the present application has a description involving "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed in the present application.

[0036] Embodiments

[0037] Reference Figures 1-8 The present embodiment provides a folding cover plate manufacturing system for display screen, comprising a printing unit 100, a die-cutting unit 200, a detection unit 300, a laser processing unit 400 and a laminating unit 500 connected in sequence through a conveying line (such as a belt conveyor), the printing unit 100 is used for printing ink frame on the substrate, the die-cutting unit 200 is used for rolling and pasting OCA adhesive layer on the printed substrate and performing overall die-cutting to obtain a substrate 600, the detection unit 300 is used for detecting whether the substrate 600 has warping and / or bubble defects, the laser processing unit 400 is used for laser processing the substrate 600, and the laminating unit 500 is used for laminating a functional layer 700 (such as a flexible film) on the laser-processed substrate 600; wherein the detection unit 300 comprises a first box body 310 with through holes on both sides, a detection mechanism 320 is arranged in the first box body 310, the detection mechanism 320 comprises a movable shaft 321 movably connected between the inner side walls of the first box body 310, a contact plate 322 is connected to the lower end of the movable shaft 321, the contact plate 322 is arranged obliquely towards the conveying line, the contact plate 322 is used for contacting the top surface of the substrate 600 on the conveying line, a synchronous rod 323 is connected to the top of the movable shaft 321 in a radial direction, a pull wire 324 is connected to the top of the synchronous rod 323, and a trigger mechanism 325 is connected to the pull wire 324.

[0038] In the present embodiment, after the substrate 600 is prepared by the printing unit 100 printing the ink frame on the substrate, the die-cutting unit 200 laminating the OCA adhesive layer on the printed substrate and performing overall die-cutting, and then entering the detection link, at this time, the substrate 600 moves to the first box 310 through the conveying line, and when passing through the detection mechanism 320, if the substrate 600 has obvious bubbles or warping, the top surface of the substrate 600 will form a protrusion, at this time, the protrusion part of the substrate 600 passes through the inclined contact plate 322, which can drive the contact plate 322 to rotate by a certain angle, and the movable shaft 321 also rotates by a certain angle. Since there may be a case where the protrusion height is low, the rotation angle of the movable shaft 321 will be relatively small, and it is difficult to accurately detect the angle change through a general sensor, therefore, the rotation arc of the movable shaft 321 is amplified through the synchronous rod 323 connected to the movable shaft 321, and when the synchronous rod 323 rotates by a large arc, the pull wire 324 can be obviously pulled, thereby driving the trigger mechanism 325 to operate, that is, the obvious bubble or warping protrusion defect of the substrate 600 is detected. Since the detection mechanism 320 based on mechanical triggering in the present embodiment can quickly and accurately detect the protrusion defect of the substrate 600 online, the time for waiting for the detection result is saved, therefore, when the substrate 600 passes through the detection unit 300 driven by the conveying line, it does not need to be slowed down or stopped, and can be conveyed at a normal speed, thereby improving the detection efficiency, that is, improving the working efficiency of the production line, and expensive machine vision recognition equipment can be saved, and the equipment cost is also reduced.

[0039] It should be noted that the printing unit 100 can use existing high-precision roll-to-roll screen printing equipment to improve the printing quality; the die-cutting unit 200 can use an existing asynchronous die-cutting and laminating type die-cutting machine, and the laser processing unit 400 can use an existing ultra-short pulse laser (such as a picosecond / femtosecond laser) processing equipment to process the microstructure (such as hole opening, cutting, etc.) of the substrate, so as to reduce the heat affected zone, and real-time optical detection can also be combined to dynamically adjust the laser power and focal point position, so as to ensure the processing precision.

[0040] As an optional embodiment, the trigger mechanism 325 includes a sliding block 3251 connected with the pull wire 324, the sliding block 3251 is slidingly connected to the top of the first box 310 through a sliding rail, the sliding direction of the sliding block 3251 is parallel to the conveying direction of the conveying line, one side of the sliding block 3251 close to the synchronous rod 323 is connected with a first spring 3252, and the other end of the first spring 3252 is connected with a pressure sensor 3253 arranged on the top of the first box 310.

[0041] In the embodiment, when the pull wire 324 is pulled, the sliding block 3251 can be driven to slide along the sliding rail, the friction loss of the pull force of the pull wire 324 can be reduced, at this time, the sliding block 3251 can generate a pressing force on the first spring 3252, the first spring 3252 presses the pressure sensor 3253, and the corresponding pressure data is detected through the pressure sensor 3253. Here, a corresponding pressure threshold can be set, when the detected pressure data is greater than the pressure threshold, it is judged that the substrate 600 has obvious bubble or warping and other convex defects, the feedback is timely, the sliding block 3251 can be automatically reset through the first spring 3252, the continuous online detection requirement is met, at the same time, the first spring 3252 can have a certain resistance to the sliding block 3251, the false triggering mechanism 325 caused by slight vibration during transportation of the conveying line is prevented, and a certain false detection prevention function is also achieved.

[0042] As an optional embodiment, the contact plate 322 includes a movable plate 3221 connected to the lower end of the movable shaft 321, and a hollow cylinder 3222 movably connected to the bottom of the movable plate 3221 and in contact with the top surface of the substrate 600.

[0043] In the embodiment, the contact plate 322 should be made of light sheet, and the hollow cylinder 3222 is used to contact the top surface of the substrate 600, which can reduce the scratching of the substrate 600 to ensure product quality, and the overall weight of the contact plate 322 is light, which can ensure the reaction sensitivity to the convex defects of the substrate 600, thereby ensuring the detection sensitivity.

[0044] Since the convex defects on the substrate 600 are generally flattened by a whole flattening roller at present, in order to ensure the flattening effect, the moving speed of the substrate 600 needs to be reduced or stopped to allow the flattening roller to have enough time to reciprocate and flatten the surface of the substrate 600, and the surface of the substrate 600 is flattened sufficiently, but this leads to a reduction in work efficiency. Therefore, as an optional embodiment, the pressure sensor 3253 is electrically connected with a controller 330, the controller 330 is electrically connected with a flattening mechanism 340, the detection mechanism 320 and the flattening mechanism 340 are arranged in sequence along the conveying line, the flattening mechanism 340 includes a first telescopic cylinder 341 arranged on the top of the first box body 310, a connecting frame 342 located in the first box body 310 is connected to the bottom of the first telescopic cylinder 341, a rotating stick 343 is movably connected to the bottom of the connecting frame 342, a first motor 344 for driving the rotating stick 343 is arranged on the outer side wall of the connecting frame 342, the first motor 344 and the first telescopic cylinder 341 are electrically connected with the controller 330, a plurality of flexible flattening components 345 are arranged in an annular array around the axis of the rotating stick 343, and the flexible flattening components 345 are used to flatten the warping and / or bubbles on the substrate 600.

[0045] In the embodiment, the pressure sensor 3253 can send the detected pressure data to the controller 330. When the controller 330 receives the pressure data and determines that the pressure threshold is exceeded, the controller 330 can send a control signal to the first motor 344 and the first telescopic cylinder 341 to make corresponding actions. At this time, the first telescopic cylinder 341 drives the connecting frame 342 and its connected accessories to move downward as a whole, and the first motor 344 drives the rotating rod 343 and the plurality of flexible flattening assemblies 345 to rotate at a certain speed. Here, the plurality of flexible flattening assemblies 345 can flatten the warping and / or bubbles on the substrate 600 multiple times, ensuring the flattening effect. The flexible flattening assembly 345 has a flexible flattening function, which can prevent scratching the surface of the substrate 600. Therefore, when the substrate 600 passes through the flattening mechanism 340 on the conveying line, it can move at a normal conveying speed without the need to slow down or stop, further improving the production line work efficiency.

[0046] It should be noted that the rotating direction of the rotating rod 343 can be opposite to the conveying direction of the conveying line, so that the relative speed difference between the revolution speed of the flexible flattening assembly 345 and the conveying speed of the conveying line is large, the number of times that the flexible flattening assembly 345 flattens the surface of the substrate 600 is increased, and the surface of the substrate 600 can be fully contacted, thereby improving the flattening effect.

[0047] As an optional embodiment, the flexible flattening assembly 345 includes a connecting plate 3451 connected to the rotating rod 343, the connecting plate 3451 is provided with a guide groove extending through the end of the connecting plate 3451, a second spring 3452 (a plurality of second springs 3452 are uniformly arranged) is connected in the guide groove, a telescopic plate 3453 is connected to the second spring 3452, and a pressure roller 3454 is movably connected to one end of the telescopic plate 3453 extending out of the guide groove. The pressure roller 3454 is used to flatten the warping and / or bubbles on the substrate 600.

[0048] In the embodiment, when the flexible flattening assembly 345 contacts the surface of the substrate 600, the pressure roller 3454 can first contact the surface of the substrate 600, and the pressure roller 3454 can be adaptively rotated to reduce the abrasion of the surface of the substrate 600. At the same time, the second spring 3452 has an outward pushing force on the telescopic plate 3453, so as to ensure that the pressure roller 3454 has enough pressure on the surface of the substrate 600 to flatten the protruding defects. When the pressure roller 3454 revolves, the second spring 3452 drives the telescopic plate 3453 to continue to extend outward, so that the pressure roller 3454 can continuously adhere to different surfaces of the moving substrate 600, thereby increasing the adhesion area of each pressure roller 3454 to the surface of the substrate 600, further improving the flattening effect, and providing a prerequisite for ensuring the flattening effect when the conveying speed of the substrate 600 on the conveying line is unchanged.

[0049] As an optional embodiment, the controller 330 is internally provided with a regulation module for controlling the coordinated operation of the components of the printing unit 100, and the regulation module internally stores a preset regulation model, the expression of which is:

[0050] Q=K1·(F / σ) +K2·tanθ +K3 / V+ K4·logH + K5·ΔT;

[0051] ΔT<α·δ / ε;

[0052] In the formula, Q is the target printing precision, K1 is the first empirical coefficient, K2 is the second empirical coefficient, K3 is the third empirical coefficient, K4 is the fourth empirical coefficient, K5 is the fifth empirical coefficient, F is the screen tension (preferably 9-12 N / cm 2 ), σ is the surface energy of the substrate, θ is the doctor blade angle (preferably 60±2°), V is the printing speed (preferably 0.3-0.8 m / min), H is the hardness of the doctor blade (preferably 70-80 Shore A), ΔT is the step curing temperature (preferably 30±5℃), α is the thermal expansion coefficient of the substrate, δ is the ink border layer thickness, and ε is the thermal strain threshold; wherein the screen tension F and the printing speed V are negatively associated, and the hardness of the doctor blade H and the doctor blade angle θ are negatively associated.

[0053] In the present embodiment, in the above formula, the target printing precision Q can be a range value for evaluating the printing pattern precision, adhesion and other indicators, and the purpose is to coordinate the key parameters (including screen tension F, doctor blade angle θ, printing speed V, doctor blade hardness H and step curing temperature ΔT) of the components of the printing unit 100 through the target printing precision Q, so that the overall printing precision can always be maintained within a standard range, thereby ensuring the printing pattern precision and adhesion, so that the post-printing quality inspection link can be omitted and directly enter the die-cutting unit 200, further improving the work efficiency, and at the same time saving the cost of quality inspection equipment. In the above formula, F / σ reflects the matching degree of the screen tension and the surface energy of the substrate, and a high tension (>12 N / cm 2) need to match high surface energy substrate (such as plasma treated CPI), otherwise lead to uneven ink transfer, surface energy can be achieved by Ar / O2 mixed gas plasma treatment; tanθ represent the angle of the scraper on the influence of shear force; speed inverse relationship (i.e. K3 / V) can reflect the dynamic balance, low speed (0.3 m / min) to ensure that the micron level mesh hole filling, speed > 0.8 m / min, ink flow time is not enough to cause pinhole defects; scraper hardness term based on logarithmic function (i.e. logH) can compensate for the non-linear effect of hardness, if the scraper hardness < 70 Shore A, will lead to the deformation of the scraper increased overprint error; the ladder curing temperature ΔT is used to control the stress distribution, if the temperature difference > 35 ℃, the ink layer crack rate will increase to 15%, and the ladder curing temperature ΔT through the non-steady-state heat transfer model to suppress the interface stress, meet the relationship: ΔT < alpha. Delta / epsilon, this model will material properties, dynamic response and thermodynamic behavior of the unified quantitative, for ultra-thin flexible substrate printing to provide a closed-loop control of the mathematical model; the above empirical coefficients K1-K5 for the balance adjustment of the different properties of the parameters, so as to be superimposed, empirical coefficients K1-K5 can be calibrated by orthogonal experiment; wherein, screen tension F and printing speed V negative correlation associated with, namely high tension needs to be synchronized with the speed, that is, through the parameter term K3 / V to compensate for the parameter term K1. (F / σ), scraper hardness H and scraper angle θ negative correlation associated with, namely high hardness scraper needs to correspond to reduce the scraper angle, by optimizing the coordination of the above key parameters, so as to realize the dynamic balance of the target printing precision Q, prevent a key parameter sudden change caused by the influence of printing quality.

[0054] As an optional implementation, the attaching unit 500 comprises a second box body 510, the second box body 510 is provided with a grabbing mechanism 520 on the top, the grabbing mechanism 520 is used for grabbing the substrate 600, the second box body 510 is provided with an attaching mechanism 530 on the bottom, the attaching mechanism 530 is used for attaching the functional layer 700 on the bottom surface of the substrate 600, the second box body 510 is provided with a sliding groove 511 on the top, the grabbing mechanism 520 is slidably connected in the sliding groove 511 through a sliding rail, the second box body 510 is provided with a second telescopic cylinder 540 connected with the grabbing mechanism 520, the second telescopic cylinder 540 is used for driving the grabbing mechanism 520 to slide to the top of the attaching mechanism 530.

[0055] In the embodiment, when the attaching needs to be carried out, the grabbing mechanism 520 is used to grab the substrate 600 on the conveying line, then the second telescopic cylinder 540 is used to drive the grabbing mechanism 520 to slide to the top of the attaching mechanism 530, and then the attaching mechanism 530 is used to attach the functional layer 700 on the bottom surface of the substrate 600, so as to realize the automatic attaching function.

[0056] As an optional implementation, the attaching mechanism 530 comprises a third telescopic cylinder 531 arranged at the bottom of the second box body 510, a frame 532 arranged at the top of the third telescopic cylinder 531, the frame 532 being used to support the functional layer 700, the frame 532 being used to press the middle area of the functional layer 700 to the middle area of the bottom surface of the substrate 600, a lifting assembly 533 arranged in the frame 532, and a bracket 534 hingedly connected to the lifting assembly 533 through a spring hinge on both sides of the lifting assembly 533, the two brackets 534 being symmetrically arranged on both sides of the frame 532, and a pressing wheel 535 movably connected to the top of the bracket 534, the pressing wheel 535 being used to press the functional layer 700 to the bottom surface of the substrate 600.

[0057] In the embodiment, after the functional layer 700 is placed on the top of the frame 532, the functional layer 700 is generally a flexible film, since the top surface of the frame 532 only contacts the middle area of the functional layer 700, at this time, the flexible film bends downward on both sides of the middle area, and has a certain arc as a whole, then the frame 532 is driven upward by the third telescopic cylinder 531 until the frame 532 attaches the middle area of the functional layer 700 to the corresponding middle area of the bottom surface (the surface with the OCA adhesive layer) of the substrate 600, then the two brackets 534 are driven upward by the lifting assembly 533, so that the pressing wheels 535 on the top of the two brackets 534 press the functional layer 700 on both sides to the bottom surface of the substrate 600, the lifting assembly 533 continues to drive the brackets 534 upward, at this time, the brackets 534 are pressed to rotate, and the angle between the brackets 534 and the frame 532 becomes larger and larger, so that the pressing wheels 535 on the top of the brackets 534 gradually press the functional layer 700 on both sides to the bottom surface of the substrate 600 in the form of rolling until the functional layer 700 is completely attached to the bottom surface of the substrate 600, and the wear is low, the embodiment adopts the mode of attaching the middle area of the functional layer 700 first and then attaching both sides at the same time, compared with the traditional mode of gradually attaching from one side or directly attaching as a whole, the attaching efficiency is higher, so that the working efficiency of the production line is further improved, at the same time, the attaching mode also reduces the probability of bubble generation, improves the product yield, and achieves two goals at once.

[0058] It should be noted that the bracket 534 is hingedly connected to both sides of the lifting assembly 533 through the spring hinge, in the state of no pressure, the bracket 534 can be close to one side of the frame 532 under the action of the spring hinge, only when subjected to external force, the bracket 534 can rotate by overcoming the elastic force of the spring hinge, therefore, when the frame 532 is driven downward by the third telescopic cylinder 531 after the attaching is completed, the lifting assembly 533 also drives the bracket 534 to move downward, the bracket 534 can be automatically reset under the action of the spring hinge, the setting of the reset structure is saved, at the same time, the internal space of the frame 532 is effectively utilized to accommodate the lifting assembly 533, the lifting assembly 533 is utilized to automatically rotate the bracket 534 in combination with the stress relationship, which is suitable for the attaching operation demand of compact space, and the attaching mechanism 530 of the embodiment can be simultaneously applied to the attaching of the flat panel or the curved panel, and has strong universality.

[0059] As an optional implementation, the lifting assembly 533 comprises a second motor 5331 arranged at the top of the frame 532, the second motor 5331 is connected with a lifting lead screw 5332, the bottom of the lifting lead screw 5332 is movably connected to the bottom of the frame 532 through a bearing, a nut seat 5333 is threadedly sleeved on the lifting lead screw 5332, two supports 534 are respectively hingedly connected to the two sides of the nut seat 5333 through spring hinges, and a guide vertical rod 5334 movably penetrating through the nut seat 5333 is fixedly arranged in the frame 532.

[0060] In this embodiment, when lifting is needed, the second motor 5331 drives the lifting lead screw 5332 to rotate, and under the limiting action of the guide vertical rod 5334, the rotary motion of the lifting lead screw 5332 is converted into the up-down linear motion of the nut seat 5333, so as to realize the automatic lifting operation of the two supports 534, and the structure is compact and suitable for lifting inside the frame 532 with limited space.

[0061] As an optional implementation, the grabbing mechanism 520 comprises a mold seat 521 slidably connected in the sliding groove 511, the bottom of the mold seat 521 is provided with a forming cavity 5211 matched with the substrate 600, the mold seat 521 is provided with an active cavity 5212 independent of the forming cavity 5211, the active cavity 5212 is provided with a lifting plate 522, the fourth telescopic cylinder 523 arranged at the top of the mold seat 521 is connected to the top of the lifting plate 522, a plurality of vacuum pipes 524 (for connecting a vacuum device) are movably arranged through the lifting plate 522, the vacuum pipes 524 movably penetrate through the top and bottom of the mold seat 521, the vacuum pipes 524 are connected with vacuum suction cups 525 for adsorbing the substrate 600, and the top of the forming cavity 5211 is provided with a blind hole 5213 for accommodating the vacuum suction cups 525.

[0062] In this embodiment, when grabbing is needed, the fourth telescopic cylinder 523 drives the lifting plate 522, the vacuum pipes 524 and the vacuum suction cups 525 to move downward as a whole, so that the vacuum suction cups 525 adsorb the substrate 600 firmly, then the fourth telescopic cylinder 523 drives the lifting plate 522 and the substrate 600 to move upward as a whole, until the vacuum suction cups 525 are attached to the blind hole 5213, at this time, the substrate 600 is also closely attached to the forming cavity 5211, so as to complete the automatic grabbing action, and the adsorption and fixing effect of the substrate 600 is good and the abrasion is low.

[0063] It should be noted that the forming cavity 5211 can be designed as a cavity structure suitable for a flat screen or a curved screen, and a section of the vacuum pipes 524 extending out of the top of the mold seat 521 can be designed as a telescopic bellows, so as to be connected with the vacuum device (not shown in the figure) through the telescopic bellows, thereby adapting to the up-down and left-right motion of the mold seat 521.

[0064] The above merely preferred embodiments of the present application and are not intended to limit the patent scope of the present application, any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A folding cover plate manufacturing system for a display screen, characterized by, The printing unit is used for printing an ink frame on a substrate, the die-cutting unit is used for laminating an OCA adhesive layer on the printed substrate and performing overall die-cuting to obtain a substrate, the detection unit is used for detecting whether the substrate has a warping and / or bubble defect, the laser processing unit is used for laser processing the substrate, and the laminating unit is used for laminating a functional layer on the laser-processed substrate. The detection unit comprises a first box body with two sides being penetrated, a detection mechanism is arranged in the first box body, the detection mechanism comprises a movable shaft movably connected between the inner side walls of the first box body, a contact plate is connected to the lower end of the movable shaft, the contact plate is arranged obliquely towards the direction of the conveying line, the contact plate is used to contact the top surface of the substrate on the conveying line, a synchronous rod is connected to the top of the movable shaft in a radial direction, a pull wire is connected to the top of the synchronous rod, and a trigger mechanism is connected to the pull wire. The controller is provided with a regulation and control module, the regulation and control module is used to control the coordinated operation of the components of the printing unit, the regulation and control module is provided with a preset regulation and control model, and the expression of the regulation and control model is as follows: Q=K1·(F / σ) +K2·tanθ +K3 / V+ K4·logH + K5·ΔT; ΔT<α·δ / ε; In the formula, Q is the target printing precision, K1 is the first empirical coefficient, K2 is the second empirical coefficient, K3 is the third empirical coefficient, K4 is the fourth empirical coefficient, K5 is the fifth empirical coefficient, F is the screen tension, σ is the surface energy of the substrate, θ is the doctor blade angle, V is the printing speed, H is the doctor blade hardness, ΔT is the step curing temperature, α is the thermal expansion coefficient of the substrate, δ is the thickness of the ink frame layer, and ε is the thermal strain threshold value. The screen tension F and the printing speed V are negatively associated and moved together, and the doctor blade hardness H and the doctor blade angle θ are negatively associated and moved together.

2. A system for manufacturing a folding cover plate for a display screen as claimed in claim 1, characterized in that The contact plate comprises a movable plate connected to the lower end of the movable shaft, and a hollow cylinder movably connected to the bottom of the movable plate and used to contact the top surface of the substrate.

3. A system for manufacturing a folding cover plate for a display screen as defined in claim 1, wherein The controller is electrically connected with a flattening mechanism, the detection mechanism and the flattening mechanism are arranged in sequence along the direction of the conveying line, the flattening mechanism comprises a first telescopic cylinder arranged on the top of the first box body, a connecting frame is connected to the bottom of the first telescopic cylinder and located in the first box body, a rotating stick is movably connected to the bottom of the connecting frame, a first motor is arranged on the outer side wall of the connecting frame and used to drive the rotating stick, the first motor and the first telescopic cylinder are electrically connected with the controller, a plurality of flexible flattening components are arranged in a ring array around the axis of the rotating stick on the rotating stick, and the flexible flattening components are used to flatten the warping and / or bubbles on the substrate.

4. A system for manufacturing a folding cover plate for a display screen as defined in claim 3, wherein The flexible flattening assembly comprises a connecting plate connected to the rotating stick, a guide groove is formed in the connecting plate and extends through the end of the connecting plate, a second spring is connected in the guide groove, an extension plate is connected to the second spring, a pressure roller is movably connected to one end of the extension plate extending out of the guide groove, and the pressure roller is used to flatten the warping and / or bubbles on the substrate.

5. A system for manufacturing a folding cover plate for a display screen according to any one of claims 1 to 4, wherein The laminating unit comprises a second box body, a grabbing mechanism is arranged on the top of the second box body and used to grab the substrate, a laminating mechanism is arranged on the inner bottom of the second box body and used to laminate the functional layer on the bottom surface of the substrate, a sliding groove is formed on the top of the second box body, the grabbing mechanism is slidably connected in the sliding groove through a sliding rail, the second box body is provided with a second telescopic cylinder connected with the grabbing mechanism, and the second telescopic cylinder is used to drive the grabbing mechanism to slide to the position directly above the laminating mechanism.

6. A system for manufacturing a folding cover plate for a display screen as defined in claim 5, wherein The laminating mechanism comprises a third telescopic cylinder arranged on the inner bottom of the second box body, a frame is arranged on the top of the third telescopic cylinder, the top of the frame is used to support the functional layer, the frame is used to press the middle area of the functional layer to the middle area of the bottom surface of the substrate, a lifting assembly is arranged in the frame, supports are hingedly connected to both sides of the lifting assembly through spring hinges, the two supports are symmetrically arranged on both sides of the frame, pressure wheels are movably connected to the tops of the supports, and the pressure wheels are used to press the functional layer to the bottom surface of the substrate.

7. A system for manufacturing a folding cover plate for a display screen as defined in claim 6, wherein The lifting assembly comprises a second motor arranged on the inner top of the frame, a lifting lead screw is connected to the second motor, the bottom of the lifting lead screw is movably connected to the inner bottom of the frame through a bearing, a nut seat is threadedly sleeved on the lifting lead screw, the two supports are hingedly connected to both sides of the nut seat through spring hinges, and a guide vertical rod is movably arranged in the frame and penetrates through the nut seat.

8. A system for manufacturing a folding cover plate for a display screen as defined in claim 5, wherein, The grabbing mechanism comprises a mold base slidably connected in the sliding groove, a forming cavity matched with the substrate is formed in the bottom of the mold base, a movable cavity independent of the forming cavity is formed in the mold base, a lifting plate is arranged in the movable cavity, a fourth telescopic cylinder is arranged on the top of the mold base and connected to the top of the lifting plate, a plurality of vacuum tubes are arranged on the lifting plate and movably penetrate through the top and the bottom of the mold base, vacuum suction cups for sucking the substrate are connected to the bottoms of the vacuum tubes, and a blind hole for accommodating the vacuum suction cups is formed in the top of the forming cavity.

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