Method and device for automatically inspecting and repairing screen printing plate

Abstract

The invention discloses a method and device for automatically inspecting and repairing a screen printing plate, the device comprises a fixed base arranged on a printing machine and a data processing module independently arranged, a movable supporting arm is installed on the fixed base, and a repairing mechanism is installed at the end, away from the fixed base, of the supporting arm; and the data processing module is configured to repair the damaged position of the screen online and is connected with the supporting arm and the intelligent identification mechanism. The device is simple in structure, the device is arranged on the printing machine, when the screen printing plate is damaged, the screen printing plate does not need to be manually taken down from the printing machine for offline repair, only online repair needs to be conducted on the printing machine, and due to the fact that the screen printing plate can be inspected and repaired in a full-automatic state, the production efficiency is greatly improved. The time for personnel to inspect and identify the damaged area, the earlier-stage preparation time and the repairing agent curing time are saved, the downtime influenced by screen damage repairing is shortened, and meanwhile the labor efficiency of personnel is improved.

Description

Technical Field

[0001] The invention relates to the technical field of screen printing, in particular to a method and a device for automatically inspecting and repairing a screen. Background Art

[0002] In the photovoltaic cell industry, the preparation of metal grid lines mainly relies on screen printing technology. However, in the long-term screen printing process, the screen will inevitably be damaged, which not only affects the printing quality but also reduces production efficiency. Therefore, regular inspection and timely repair of the screen are important links to ensure the quality of screen printing.

[0003] At present, all the screen repair methods are offline methods to assist repair. Specifically, these methods usually require the screen to be removed from the printing press and then manually inspected and repaired on a special inspection table. This method has many shortcomings:

[0004] Inconvenient operation: Due to the complex internal structure of the printing machine, the various screen sizes, and the different positions and shapes of patterns, operators often need to bend over, stand on their heels, or put something under their feet when inspecting and repairing the screen, or even need to climb inside the machine. This operation method is not only labor-intensive, but also easily causes visual fatigue and increases the physical burden on the operator.

[0005] Low efficiency: The offline repair method requires the screen to be removed from the printing press, then moved to the inspection table, and then reinstalled back into the printing press after the repair is completed. This series of operations is time-consuming and seriously affects production efficiency.

[0006] High missed detection rate: Due to the limitations of manual operation, especially under complex screen structures and patterns, operators are prone to miss some minor damaged points, resulting in incomplete repairs, which in turn affects the final printing quality.

[0007] In summary, although the existing off-line screen repair method can solve the screen damage problem to a certain extent, it has obvious shortcomings in terms of operation convenience, work efficiency and repair quality. Therefore, a method and device for automatically inspecting and repairing the screen is developed. Summary of the invention

[0008] The object of the present invention is to provide a method and device for automatically inspecting and repairing a screen, so as to solve the problems raised in the above-mentioned background technology.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for automatically inspecting and repairing a screen, comprising a fixed base arranged on a printing press and a separately arranged data processing module, wherein a movable support arm is installed on the fixed base, and a repair mechanism is installed at one end of the support arm away from the fixed base, which is configured to repair the damaged position of the screen online, and the data processing module is connected to the support arm and the intelligent recognition mechanism, wherein the intelligent recognition mechanism is configured to perform image recognition and collect data such as distance.

[0010] As a further solution of the present invention: the support arm is connected to the fixed base via a transmission mechanism, and a rotation stop block is installed on the transmission mechanism for limiting the support arm to complete a 360° rotation.

[0011] As a further solution of the present invention: a fixing frame is installed at the end of the support arm away from the transmission mechanism, and a drying mechanism and the repairing mechanism are installed on the fixing frame.

[0012] As a further solution of the present invention: the repair mechanism includes an injection tube detachably assembled to the fixing frame, and two ends of the injection tube are respectively configured as a repair agent inlet and a repair agent outlet, wherein the repair agent inlet is connected to the liquid storage mechanism.

[0013] As a further solution of the present invention: the liquid storage mechanism includes a liquid storage tank installed on a fixed base and an infusion tube connecting the liquid storage tank and the injection tube, and a valve for controlling the flow rate of the repair agent is installed on the infusion tube.

[0014] As a further solution of the present invention: the repair mechanism includes a syringe filled with repair agent, a piston is arranged inside the syringe, a push rod is installed on the piston, and its end passes through the syringe. The syringe is provided with a connecting frame for detachably fixing it on a fixed frame.

[0015] As a further solution of the present invention: a needle is installed at the end of the syringe, and the inner diameter of the liquid outlet end of the needle is 0.005mm to 0.5mm.

[0016] As a further solution of the present invention: a telescopic bracket is installed on the fixing frame, and the telescopic bracket is engaged with the push rod to control the rise or depression of the push rod.

[0017] A method for automatically inspecting and repairing a screen, comprising the following steps:

[0018] S1, firstly, the damaged position of the screen on the printing machine is identified by the intelligent identification mechanism, and the information of these positions is converted into data and transmitted to the data processing module;

[0019] S2. After receiving the data of the damaged position, the data processing module will output corresponding instructions to guide the repair mechanism to move to the designated position to be repaired;

[0020] S3. When the repair mechanism reaches the damaged position accurately, the repair agent is controlled to flow out according to the instruction issued by the data processing module, and is accurately filled into the damaged part of the screen;

[0021] S4. After the repair agent is filled, the drying mechanism takes measures to accelerate the solidification process of the repair agent at the damaged location.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present application sets the device on the printing press. When the screen is damaged, there is no need to manually remove the screen from the printing press for offline repair. It only needs to be repaired online on the printing press. At the same time, with the combination of the intelligent recognition mechanism and the data processing module, the damaged position of the screen can be automatically identified according to the inspection pattern. The personnel do not need to bend over, tiptoe, or put their bodies deep into the narrow machine to accurately complete the screen damage inspection and repair work. In addition, since the intelligent recognition mechanism can automatically identify the damaged area, it avoids problems such as missed inspections due to poor vision, and greatly improves the accuracy of screen repair, avoiding the impact of human operating errors. Since the inspection and repair of the screen can be carried out in a fully automatic state, the time for personnel to inspect and identify the damaged area and the early preparation time and the time for the curing of the repair agent are saved, the downtime caused by the repair of the damaged screen is reduced, and the labor efficiency of the personnel is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a first embodiment of an automatic screen inspection and repair device of the present invention;

[0025] Figure 2 A schematic diagram of a repair mechanism of a first embodiment of an automatic inspection and repair screen device of the present invention;

[0026] Figure 3 A schematic diagram of a second embodiment of the automatic inspection and repair screen device of the present invention;

[0027] Figure 4 A schematic diagram of a repair mechanism of a second embodiment of the automatic inspection and repair screen device of the present invention;

[0028] Figure 5 It is a schematic diagram of the connection between the transmission mechanism and the support arm of the present invention;

[0029] In the figure: 1. fixed base; 2. transmission mechanism; 3. support arm; 4. liquid storage mechanism; 41. liquid storage tank; 42. infusion tube; 43. valve; 5. drying mechanism; 6. intelligent identification mechanism; 7. repair mechanism; 71. injection tube; 72. syringe; 73. piston; 74. push rod; 75. connecting frame; 76. needle; 77. telescopic bracket; 8. data processing module; 9. fixed frame. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] See also Figure 1-2 and Figure 5 In the embodiment of the present invention, a device for automatically inspecting and repairing a screen includes a fixed base 1 arranged on a printing machine and a separately arranged data processing module 8. The data processing module 8 includes collecting and processing relevant data, comparing and outputting instructions to various components according to the written program. At the same time, the data processing module 8 can also expand and display real-time images for personnel monitoring. A movable support arm 3 is installed on the fixed base 1. A miniature industrial camera and a distance sensing device can be embedded in the support arm 3; the purpose is to collect state information during the repair work and feed it back to the monitor in real time. The periphery of the miniature industrial camera can be wrapped with an LED light source, which is intended to provide sufficient light when the lighting is poor, so that the collected image is clearer. A repair mechanism 7 is installed at one end of the support arm 3 away from the fixed base 1, which is configured to repair the damaged position of the screen online. The data processing module 8 is connected to the support arm 3 and the intelligent recognition mechanism 6. The intelligent recognition mechanism 6 includes components such as an industrial camera, an LED light source and a distance sensor. Its installation position includes but is not limited to the top plate of the machine or on the bracket just above the screen, and can also be installed inside or at the end of the support arm 3. This mechanism is designed to perform image recognition and distance and other data collection on the screen area. The operating principles of the intelligent recognition mechanism 6 and the data processing module 8 are both existing technologies and will not be elaborated on here. Among them, the intelligent recognition mechanism 6 is configured to perform image recognition and distance and other data collection.

[0033] Specifically, the fixed base 1 can be installed on the top bracket of the printing press or other positions of the printing press. Its main purpose is to firmly fix the device. The support arm 3 is connected to the fixed base 1 through a transmission mechanism 2, which can realize the rotation of the support arm 3 in the clockwise or counterclockwise direction. The transmission mechanism 2 is equipped with a rotation stop block for limiting the support arm 3 to complete a 360° rotation. The transmission mechanism 2 includes a motor connected to the fixed base 1. The output end of the motor is connected to the support arm 3, and the motor provides the support arm 3 with the kinetic energy required for movement and rotation, thereby moving the repair mechanism 7 on the support arm 3 to the position to be repaired, and the motor is also equipped with a rotation stop block. Secondly, the support arm 3 is also equipped with a card block used in combination with the rotation stop block. Under the action of the rotation stop block and the card block, the maximum rotation range of the support arm 3 can be limited. In addition, the intelligent recognition mechanism 6 can collect images and related distance data in real time, and transmit them to the data processing module 8 synchronously; then, the image and distance information of the support arm 3 and the damaged screen position are monitored in real time, and then, after the data processing module 8 analyzes and processes the data, the output command is transmitted to the transmission mechanism 2 and the support arm 3 to accurately adjust the moving position of the transmission mechanism 2 and the support arm 3, and finally the repair mechanism 7 controlled by the data processing module 8 reaches the repair position, without the need for personnel to go deep into the narrow machine or remove the screen for inspection and repair work, which is convenient for direct repair of the damaged screen on the printing press.

[0034] See also Figure 1-2 In one embodiment, in this embodiment, preferably, a fixing frame 9 is installed at the end of the support arm 3 away from the transmission mechanism 2, and a drying mechanism 5 and the repair mechanism 7 are installed on the fixing frame 9. The fixing frame 9 provides a stable support point for the drying mechanism 5 and the repair mechanism 7 to ensure that they can work correctly and stably. In addition, after the repair agent is filled, the drying mechanism 5 reduces the production waste caused by the slow curing of the repair agent by accelerating the curing of the repair agent. The drying mechanism 5 includes a micro-blower and a heating wire. When started, it can blow an airflow with adjustable temperature and air volume to the repair area, aiming to accelerate the curing of the repair agent. The drying mechanism 5 has the functions of adjustable heating temperature, adjustable drying wind speed, and adjustable outlet height, and the interior includes but is not limited to a heating device and an air acceleration device. In specific implementation, the temperature and wind speed will be matched and adjusted according to the characteristics of the screen material and the repair agent.

[0035] See also Figure 1-2In one embodiment, in this embodiment, preferably, the repair mechanism 7 includes an injection tube 71 detachably assembled to the fixed frame 9, and the two ends of the injection tube 71 are respectively set as a repair agent inlet and a repair agent outlet, wherein the repair agent inlet is connected to the liquid storage mechanism 4, and the liquid storage mechanism 4 includes a liquid storage tank 41 installed on the fixed base 1 and an infusion tube 42 connecting the liquid storage tank 41 and the injection tube 71, and a valve 43 for controlling the flow rate of the repair agent is installed on the infusion tube 42. The installation position of the liquid storage mechanism 4 includes but is not limited to being installed on the fixed base 1, and can also be installed at other positions as long as it does not affect the normal operation of other components. In addition, the infusion tube 42 can be attached to the outer side of the support arm 3 to ensure the stable transmission of the repair agent.

[0036] Specifically, the data processing module 8 issues a command to control the control switch of the liquid storage mechanism 4 to open. The liquid storage mechanism 4 is composed of a liquid storage tank 41 and an infusion tube 42. The flow of the repair agent is achieved through a pressure difference. The repair agent is controlled by a valve 43 at the upper end of the injection tube 71, and finally flows out from the repair agent outlet of the injection tube 71 to fill the damaged area of ​​the screen. During the repair process, the injection tube 71 can move horizontally parallel to the screen surface according to the specific situation of the screen damage, and use the fluid properties and rapid solidification properties of the repair agent to accurately fill the damaged area. In order to prevent the injection tube 71 from contacting the screen and causing secondary damage, the repair agent outlet of the injection tube 71 is kept at a distance of at least 0.01mm from the plane of the screen. The height range of the injection tube 71 from the screen is usually 0.01-1mm, and this value can be adjusted according to the specific rheological properties of the repair agent to ensure that the screen is effectively repaired.

[0037] Example 2

[0038] The difference between this embodiment and embodiment 1 is that the combination of the liquid storage mechanism 4 and the repair mechanism 7 is replaced by a single repair mechanism 7. Figure 3-5In this embodiment, the repair mechanism 7 is preferably designed to include a syringe 72 with a repair agent inside, a piston 73 is provided inside the syringe 72, and a push rod 74 is installed on the piston 73, the end of which passes through the outside of the syringe 72. Under the combination of the push rod 74 and the piston 73, when the push rod 74 is pressed down, the repair agent in the syringe 72 can be squeezed out and used for filling, and by pulling out the push rod 74, the repair agent can be drawn from the outside into the inside of the syringe 72; the syringe 72 is detachably fixed to the fixing frame 9 through the connecting frame 75. The end of the syringe 72 is equipped with a needle 76, and the inner diameter of the liquid outlet of the needle 76 ranges from 0.005mm to 0.5mm, which is convenient for replacement as needed. A telescopic bracket 77 is also installed on the fixed frame 9. The telescopic bracket 77 is engaged with the push rod 74 and is used to control the up and down movement of the push rod 74, thereby pushing the piston 73 to squeeze the repair agent out of the needle 76. The telescopic bracket 77 is connected to the data processing module 8 and is controlled by it to realize the automation of the repair process. The same effect as in Example 1 can be achieved by simply installing a simple telescopic bracket 77 on the support arm 3.

[0039] During the repair operation, the repair mode can be switched and controlled freely. Specifically, the automatic repair mode or the designated position repair mode can be switched according to the software interface. The method can be used for automatic repair work. It can also be controlled by software in real time according to the size, shape, height and other conditions of the pattern, without the need for personnel to go deep into the narrow machine or remove the screen for inspection and repair work. Therefore, the operation is convenient and fast, and the accuracy and speed of repair are improved, thereby greatly improving work efficiency.

[0040] A method for automatically inspecting and repairing a screen, comprising the following steps:

[0041] S1, firstly, the damaged position of the screen on the printing press is identified by the intelligent identification mechanism 6, and the information of these positions is converted into data and transmitted to the data processing module 8;

[0042] Specifically, the intelligent recognition mechanism 6 collects and monitors the image and related distance data of the screen on the printing press in real time, and transmits the data to the data processing module 8 synchronously.

[0043] S2. After receiving the data of the damaged position, the data processing module 8 will output corresponding instructions to guide the repair mechanism 7 to move to the designated position to be repaired;

[0044] Specifically, after the data is analyzed and processed by the data processing module 8, the output instructions are transmitted to the transmission mechanism 2 and the support arm 3 to accurately adjust the moving position of the transmission mechanism 2 and the support arm 3. Similarly, the repair mechanism 7 and the drying mechanism 5 are installed at the end of the support arm 3, and finally the repair mechanism 7 and the drying mechanism 5 are controlled by the data processing module 8 to reach the position to be repaired.

[0045] S3, when the repair mechanism 7 reaches the damaged position accurately, according to the instruction issued by the data processing module 8, the repair agent is controlled to flow out and accurately fill the damaged part of the screen;

[0046] Specifically, during the repair process, the repair mechanism 7 moves horizontally and parallel to the screen surface according to the damage of the screen, and uses the fluid properties and rapid solidification properties of the repair agent to fill the damaged area of ​​the screen, so that the damaged part of the screen is repaired.

[0047] S4. After the repair agent is filled, the drying mechanism takes measures to accelerate the solidification process of the repair agent at the damaged location to ensure that the repair area solidifies quickly, thereby reducing production waiting time and improving production efficiency.

[0048] The working principle and use process of the present invention are as follows: when the screen is printing, the intelligent recognition mechanism 6 collects and monitors the image and related distance data of the screen in real time, and transmits them to the data processing module 8 synchronously. When it is analyzed that a certain position of the screen is damaged, the data processing module 8 outputs instructions to the transmission mechanism 2 and the support arm 3 to accurately adjust the moving position of the transmission mechanism 2 and the support arm 3. Finally, the repair mechanism 7 controlled by the data processing module 8 reaches the position to be repaired, and the repair mechanism 7 completes the repair of the damaged position. After the repair is completed, the drying mechanism 5 is turned on to accelerate the curing of the repair agent.

[0049] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0050] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A device for automatically inspecting and repairing a screen, characterized in that: It includes a fixed base arranged on a printing press and a separately arranged data processing module, wherein a movable support arm is installed on the fixed base, and a repair mechanism is installed at one end of the support arm away from the fixed base, and is configured to repair the damaged position of the screen online, and the data processing module is connected to the support arm and the intelligent recognition mechanism, wherein the intelligent recognition mechanism is configured to perform image recognition and collect data such as distance.

2. The automatic inspection and repairing device of claim 1, characterized in that: The support arm is connected to the fixed base via a transmission mechanism, and a rotation stop block is installed on the transmission mechanism to limit the support arm to complete a 360° rotation.

3. The automatic screen inspection and repair device according to claim 1, characterized in that: A fixing frame is installed at the end of the support arm away from the transmission mechanism, and a drying mechanism and the repairing mechanism are installed on the fixing frame.

4. The automatic screen inspection and repair device according to claim 3, characterized in that: The repair mechanism comprises an injection tube detachably mounted on a fixing frame, two ends of the injection tube are respectively arranged as a repair agent inlet and a repair agent outlet, wherein the repair agent inlet is connected to the liquid storage mechanism.

5. The automatic screen inspection and repair device according to claim 4, characterized in that: The liquid storage mechanism comprises a liquid storage tank installed on a fixed base and a liquid infusion tube connecting the liquid storage tank and an injection tube, and a valve for controlling the flow rate of the repair agent is installed on the liquid infusion tube.

6. The automatic screen inspection and repair device according to claim 3, characterized in that: The repair mechanism comprises a syringe filled with repair agent, a piston is arranged inside the syringe, a push rod is installed on the piston, and the end of the push rod passes through the syringe. The syringe is provided with a connecting frame for detachably fixing it on a fixing frame.

7. The automatic screen inspection and repair device according to claim 6, characterized in that: A needle is installed at the end of the syringe, and the inner diameter of the liquid outlet end of the needle is 0.005mm to 0.5mm.

8. The automatic screen inspection and repair device according to claim 7, characterized in that: A telescopic bracket is installed on the fixing frame, and the telescopic bracket is engaged with the push rod to control the rise or depression of the push rod.

9. The method for automatically inspecting and repairing a screen according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, firstly, the damaged position of the screen on the printing machine is identified by the intelligent identification mechanism, and the information of these positions is converted into data and transmitted to the data processing module; S2. After receiving the data of the damaged position, the data processing module will output corresponding instructions to guide the repair mechanism to move to the designated position to be repaired; S3. When the repair mechanism reaches the damaged position accurately, the repair agent is controlled to flow out according to the instruction issued by the data processing module, and is accurately filled into the damaged part of the screen; S4. After the repair agent is filled, the drying mechanism takes measures to accelerate the solidification process of the repair agent at the damaged location.

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