An appearance quality visual inspection device and method for printing screens

Abstract

The present invention discloses a visual inspection device for the appearance quality of a printing screen plate, which relates to the technical field of visual inspection. The device includes a support cabinet, and a conveying device for conveying the screen plate is arranged on the top of the support cabinet. The device further includes: two fixed support plates, which are respectively fixedly connected to both sides of the top of the support cabinet and are respectively arranged on both sides of the conveying device. A limiting groove is formed on the outer side of the fixed support plate. Vertical plates are arranged on the front sides of the two fixed support plates, and clamping members for clamping the screen plate are arranged on the opposite sides of the two vertical plates; after the test is completed, the lifting plate drives the flipped screen plate to descend, and the clamping member moves away from the outer side of the screen plate, so that the screen plate is placed on the conveying device again, and then the other side of the screen plate is detected by the first detection head, thereby ensuring the detection of both sides of the screen plate, avoiding the need to repeatedly convey and detect the other side of the screen plate, and during each flipping of the screen plate, the first detection head performs a self-test once, thereby ensuring the accuracy of the test.

Description

Technical Field

[0001] The present invention relates to the technical field of visual inspection, and particularly relates to a visual inspection device and method for the appearance quality of a printing screen. Background Art

[0002] ‌The electrode screen is a screen structure used for printing electrodes, and is widely used in manufacturing processes such as electrochemical sensors and solar cells.‌ The electrode screen is usually composed of a screen frame and a screen cloth. Specific patterns or holes are designed on the screen cloth to accurately transfer conductive ink or other materials onto the substrate during the printing process, thereby forming the required electrode structure. This printing technology has the advantages of being simple and fast, applicable to a variety of printing materials and shapes, capable of realizing batch production of electrodes and ensuring consistency, etc.

[0003] ‌A novel solar cell printing screen detection platform disclosed in the patent application with the reference publication number CN204575552U includes a lamp tube box with an open top and a lamp tube. The lamp tube is placed inside the lamp tube box to gather light. The edge of the open mouth is turned outwards to form a wide edge to form a detection table for supporting the printing screen, and the detection table is adapted to the frame of the printing screen.

[0004] When detecting the printing screen, in order to avoid errors, it is necessary to detect both sides of the detected screen. The two sides can be respectively photographed and detected by detection cameras, and the detection is carried out on the conveying device. If after each side detection is completed, it is necessary to turn it over and then re-convey it on the conveying device to detect the other side, resulting in a decrease in detection efficiency.

[0005] Therefore, it is necessary to provide a visual inspection device and method for the appearance quality of a printing screen to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a visual inspection device and method for the appearance quality of a printing screen to solve the problem of the defects of the prior art proposed in the above background art.

[0007] Based on the above idea, the present invention provides the following technical solution: A visual inspection device for the appearance quality of a printing screen, including a support cabinet, a conveying device for conveying the screen is arranged on the top of the support cabinet, and further includes:

[0008] Two fixed support plates, the two fixed support plates are respectively fixedly connected to both sides of the top of the support cabinet, and are respectively arranged on both sides of the conveying device. A limiting groove is opened on the outer side of the fixed support plate. Vertical plates are arranged on the front sides of the two fixed support plates, and clamping members for clamping the screen are arranged on the opposite sides of the two vertical plates;

[0009] A lifting plate sleeved on the outside of a fixed support plate. A lifting frame is fixedly connected to the top of the support cabinet. A linear module for lifting the lifting plate is arranged inside the lifting frame. A connecting member is arranged between the lifting plate and the vertical plate. When the lifting plate drives the vertical plate to rise through the connecting member, the clamping member is flipped;

[0010] A first detection head for detecting a screen plate. The first detection head is fixedly connected to the support cabinet through a fixed frame;

[0011] A fixed support. The fixed support is fixedly connected to the outside of the lifting frame. A comparison screen plate for testing the first detection head is arranged at the top of the fixed support. A traction member is arranged on the outside of the lifting plate. When the lifting plate rises, the comparison screen plate is released to move below the first detection head.

[0012] As a further solution of the present invention: The clamping member includes:

[0013] A rotating disk arranged on one side of the vertical plate. A rotating rod is fixedly connected to one side of the rotating disk. The rotating rod penetrates through the vertical plate and is rotatably connected to the vertical plate;

[0014] Two mounting plates. Both of the two mounting plates are fixedly connected to one side of the rotating disk, and the two mounting plates are arranged opposite to each other up and down;

[0015] Two electromagnets. The two electromagnets are respectively arranged on the opposite sides of the two mounting plates. The two electromagnets are magnetically adsorbed to each other when energized. A telescopic rod and a first spring are fixedly connected between the mounting plate and the electromagnet. The first spring is sleeved on the outside of the telescopic rod;

[0016] A gear. The gear is sleeved on the outside of the rotating rod, and the gear is connected to the rotating rod through a one-way damping bearing.

[0017] As a further solution of the present invention: The connecting member includes:

[0018] Two sliding support plates. The two sliding support plates are respectively fixedly connected to both sides of the bottom of the vertical plate, and the two sliding support plates respectively extend to both sides of the top of the lifting plate. Sliding blocks are fixedly connected to the outside of the two sliding support plates;

[0019] Two sliding seats. The two sliding seats are fixedly connected to both sides of the top of the lifting plate, and the two sliding seats respectively penetrate through the two sliding blocks and are slidably connected to the sliding blocks;

[0020] A limiting shaft. The limiting shaft is fixedly connected between the two sliding support plates, and the limiting shaft extends into a limiting groove opened inside the fixed support plate and is slidably matched with the fixed support plate;

[0021] A rack. The rack is fixedly connected to the outside of the fixed support plate. The rack is engaged with the gear. When the rotating rod drives the gear to rise, the rotating rod rotates 180 degrees through the damping of the one-way damping bearing.

[0022] As a further solution of the present invention: contact plates are fixedly connected to both sides of the outer side of the fixed support plate. Mounting seats are fixedly connected to the tops of the two sliding support plates. A tactile switch is fixedly connected to the side of the mounting seat close to the contact plate. When the tactile switch moves horizontally along with the sliding support plate and drives the two electromagnets to move to the upper and lower sides of the screen plate, the tactile switch contacts the contact plate, controlling the two electromagnets to be energized and adsorbed to clamp the screen plate.

[0023] As a further solution of the present invention: two sliding rods are fixedly connected to one side of the fixed support. Two sliding seats are slidably connected to the outer sides of the two sliding rods. The two sliding seats are fixedly connected to the bottom of the comparison screen plate, and a second spring for pushing the sliding seat to move below the first detection head is fixedly connected between the sliding seat and one end of the sliding rod.

[0024] As a further solution of the present invention: the traction member includes:

[0025] Two fixed rods, which are respectively fixedly connected to both sides of the lifting plate;

[0026] Two traction steel wires, with both ends of the traction steel wires fixedly connected to the fixed rod and the sliding seat respectively, and a guide wheel for guiding the traction steel wire is rotatably connected to the outside of the fixed support.

[0027] As a further solution of the present invention: a connecting plate is fixedly connected between the lifting plates, and a second detection head is fixedly connected to the tops of the two connecting plates.

[0028] As a further solution of the present invention: an air jet cylinder is fixedly connected to the side of the comparison screen plate away from the fixed support. A nozzle is arranged outside the air jet cylinder, and an air jet groove is opened on the outside of the air jet cylinder. A rotating cylinder is rotatably connected inside the air jet cylinder, and an opening is opened on the outside of the rotating cylinder. One end of the rotating cylinder is fixedly communicated with an air guide pipe, and the air guide pipe penetrates through the air jet cylinder and is connected to an external air jet device. A micro motor is fixed inside the air jet cylinder, and the output shaft of the micro motor is fixedly connected to the rotating cylinder, used to drive the opening to communicate with the nozzle and the air jet groove respectively for switching.

[0029] As a further solution of the present invention: a cleaning frame is arranged on the top of the comparison screen plate. A brush for cleaning the comparison screen plate is arranged at the bottom of the cleaning frame, and both ends of the cleaning frame are respectively fixedly connected to the sliding seats.

[0030] A method for visual inspection of the appearance quality of a printing screen plate includes the following steps:

[0031] Step 1: Place the screen plate on the conveying device for conveying. When it is conveyed below the first detection head, the first detection head performs visual inspection on the upper part of the screen plate;

[0032] Step 2: Then, start the linear module inside the lifting frame to drive the lifting plate to rise, so that the lifting plate drives the clamping piece on one side of the vertical plate to move through the connecting piece, making the clamping piece move to the outside of the screen plate and clamp the screen plate. And as the lifting plate rises, it drives the clamping piece to flip;

[0033] Step 3: When the lifting plate is rising, the traction piece releases the comparison screen plates at the top of the fixed bracket, and the two comparison screen plates move under the first detection head to test the first detection head;

[0034] Step 4: After the test is completed, the lifting plate drives the flipped screen plate to descend, and the clamping piece moves away from the outside of the screen plate, so that the screen plate is placed on the conveying device again, and then the other side of the screen plate is detected by the first detection head.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] 1. After the test is completed, the lifting plate drives the flipped screen plate to descend, and the clamping piece moves away from the outside of the screen plate, so that the screen plate is placed on the conveying device again, and then the other side of the screen plate is detected by the first detection head, thus ensuring the detection of both sides of the screen plate, avoiding the need to repeatedly convey and detect the other side of the screen plate, and each time the screen plate is flipped, the first detection head performs a self-test, thus ensuring the accuracy of the test.

[0037] 2. The touch switch is turned on, so that the electromagnets are energized, and the two electromagnets attract each other, thus quickly clamping the screen plate and driving the screen plate to rise. When the lifting plate descends, the touch switch is no longer in contact with the contact plate, so the electromagnets are de-energized, releasing the clamping and fixing of the screen plate, and making the mounting plate of the clamping piece move away from the screen plate, avoiding the clamping piece from blocking the detection of the screen plate. And through the adsorption and clamping of the electromagnets, the screen plates with different thicknesses can be clamped and fixed, avoiding manual adjustment, and having a wider application range.

[0038] 3. By controlling the micro motor to drive the rotating cylinder to rotate, the opening on the outer side of the rotating cylinder faces the air jet groove, so that the gas is discharged downward through the air jet groove, thus cleaning the dust on the screen plate. And as the screen plate is flipped, the other side of the screen plate can also be jet-cleaned, ensuring that the screen plate is clean during detection and avoiding detection errors.

[0039] 4. When the first detection head has an incorrect detection during the detection with the second detection head and the test of the comparison screen plates, the rotating cylinder rotates, the opening faces the nozzle, and the gas jets towards the first detection head through the nozzle, thus blowing the dust on the first detection head, improving the detection accuracy and avoiding errors. Description of the Drawings

[0040] The present invention will be further described below with reference to the drawings and embodiments.

[0041] Figure 1 is the overall structural schematic diagram of the present invention;

[0042] Figure 2 is the structural schematic diagram of the conveying device of the present invention;

[0043] Figure 3 is the structural schematic diagram of the first detection head of the present invention;

[0044] Figure 4 is the structural schematic diagram of the fixed support plate of the present invention;

[0045] Figure 5 is the structural schematic diagram of the comparison screen plate of the present invention;

[0046] Figure 6 is the structural schematic diagram of the clamping member of the present invention;

[0047] Figure 7 is the present invention Figure 5 The enlarged structural schematic diagram of part A;

[0048] Figure 8 is the present invention Figure 5 The enlarged structural schematic diagram of part B;

[0049] Figure 9 is the structural schematic diagram of the fixed bracket of the present invention;

[0050] Figure 10 is the structural schematic diagram of the air jet cylinder of the present invention;

[0051] Figure 11 is the sectional view structural schematic diagram of the air jet cylinder of the present invention.

[0052] In the figure: 1, support cabinet; 101, protection frame; 201, first conveying device; 202, second conveying device; 203, fixed frame; 204, first detection head; 3, fixed support plate; 302, limit groove; 304, rack; 401, vertical plate; 400, gear; 402, rotating disk; 403, rotating rod; 404, mounting plate; 405, electromagnet; 406, telescopic rod; 407, first spring; 408, sliding support plate; 409, mounting seat; 410, touch switch; 411, limit shaft; 5, lifting frame; 500, sliding block; 501, lifting plate; 502, sliding seat; 503, contact plate; 6, fixed bracket; 601, sliding rod; 602, sliding seat; 603, second spring; 604, cleaning frame; 7, comparison screen plate; 801, guide wheel; 802, traction wire; 803, fixed rod; 9, air jet cylinder; 901, nozzle; 902, air jet groove; 903, rotating cylinder; 904, opening; 905, micro motor; 907, air duct; 10, connecting plate; 1001, second detection head. Detailed implementation manners

[0053] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0054] In the description of the present invention, it should be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating orientation or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0055] As Figures 1 to 11 shown, a visual inspection device and method for the appearance quality of a printing screen plate includes the following embodiments:

[0056] Embodiment 1: As Figure 1 , Figure 2 and Figure 3 shown, it includes a support cabinet 1. A conveying device for conveying the screen plate is arranged on the top of the support cabinet 1. The conveying device includes two sets of opposite first conveying devices 201 and second conveying devices 202. By placing the two ends of the screen plate on the two sets of opposite first conveying devices 201 and second conveying devices 202 for conveying respectively, the conveying modes of the second conveying device 202 and the first conveying device 201 can adopt belt-type conveying, which will not be further elaborated here. And a protection frame 101 for protection is arranged on the top of the support cabinet 1. It further includes:

[0057] Two fixed support plates 3, which are respectively fixedly connected to both sides of the top of the support cabinet 1 and are respectively arranged on both sides of the conveying device. A limiting groove 302 is opened on the outer side of the fixed support plate 3. Vertical plates 401 are arranged on the front sides of the two fixed support plates 3. Clamping members for clamping the screen plate are arranged on the opposite sides of the two vertical plates 401;

[0058] A lifting plate 501 sleeved on the outer side of the fixed support plate 3. A lifting frame 5 is fixedly connected to the top of the support cabinet 1. A linear module for lifting the lifting plate 501 is arranged in the lifting frame 5. The linear module can adopt the existing screw drive or electric slide. A connecting member is arranged between the lifting plate 501 and the vertical plate 401. When the lifting plate 501 drives the vertical plate 401 to rise through the connecting member, the clamping member is flipped;

[0059] A first detection head 204 for detecting the screen plate. The first detection head 204 is fixedly connected to the support cabinet 1 through a fixed frame 203;

[0060] The fixed support 6 is fixedly connected to the outside of the lifting frame 5, and a comparison screen plate 7 for testing the first detection head 204 is arranged at the top of the fixed support 6. A traction member is arranged on the outside of the lifting plate 501. When the lifting plate 501 rises, the comparison screen plate 7 is released to move below the first detection head 204.

[0061] During specific implementation, the screen plate is placed on the conveying device for conveying. When it is conveyed below the first detection head 204, the first detection head 204 performs visual detection on the upper part of the screen plate. Then, by starting the linear module inside the lifting frame 5 to drive the lifting plate 501 to rise, the lifting plate 501 drives the clamping member on one side of the vertical plate 401 through the connecting member to move, so that the clamping member moves to the outside of the screen plate and clamps the screen plate. And as the lifting plate 501 rises, it drives the clamping member to flip. When the lifting plate 501 is rising, the traction member releases the comparison screen plate 7 at the top of the fixed support 6, and the two comparison screen plates 7 move below the first detection head 204 to test the first detection head 204. After the test is completed, the lifting plate 501 drives the flipped screen plate to descend, and the clamping member moves away from the outside of the screen plate, so that the screen plate is placed on the conveying device again, and then the first detection head 204 detects the other side of the screen plate, thereby ensuring the detection of both sides of the screen plate, avoiding the need to repeatedly convey and detect the other side of the screen plate, and each time the screen plate is flipped, the first detection head 204 performs a self-test once, thereby ensuring the accuracy of the test.

[0062] Embodiment 2: As Figure 4 、 Figure 5 and Figure 6 shown, the clamping member includes:

[0063] A rotating disk 402 arranged on one side of the vertical plate 401, a rotating rod 403 is fixedly connected to one side of the rotating disk 402, and the rotating rod 403 penetrates through the vertical plate 401 and is rotatably connected to the vertical plate 401;

[0064] Two mounting plates 404, both of the two mounting plates 404 are fixedly connected to one side of the rotating disk 402, and the two mounting plates 404 are arranged up and down relatively;

[0065] Two electromagnets 405, the two electromagnets 405 are respectively arranged on the opposite sides of the two mounting plates 404, the two electromagnets 405 are magnetically adsorbed to each other when energized, and a telescopic rod 406 and a first spring 407 are fixedly connected between the mounting plate 404 and the electromagnet 405, and the first spring 407 is sleeved on the outside of the telescopic rod 406;

[0066] A gear 400, the gear 400 is sleeved on the outside of the rotating rod 403, and the gear 400 is connected to the rotating rod 403 through a one-way damping bearing.

[0067] The connecting member includes:

[0068] Two sliding support plates 408, the two sliding support plates 408 are respectively fixedly connected to both sides of the bottom of the vertical plate 401, and the two sliding support plates 408 respectively extend to both sides of the top of the lifting plate 501. Sliding blocks 500 are fixedly connected to the outer sides of the two sliding support plates 408;

[0069] Two sliding seats 502, the two sliding seats 502 are fixedly connected to both sides of the top of the lifting plate 501, and the two sliding seats 502 respectively penetrate through the two sliding blocks 500 and are slidably connected to the sliding blocks 500;

[0070] A limiting shaft 411, the limiting shaft 411 is fixedly connected between the two sliding support plates 408, and the limiting shaft 411 extends into the limiting groove 302 opened inside the fixed support plate 3 and is slidably matched with the fixed support plate 3;

[0071] A rack 304, the rack 304 is fixedly connected to the outside of the fixed support plate 3, the rack 304 is engaged with the gear 400. When the rotating rod 403 drives the gear 400 to rise, the rotating rod 403 rotates 180 degrees through the damping of the one-way damping bearing.

[0072] During specific implementation, when the screen plate needs to be flipped, the linear module inside the lifting frame 5 is started to drive the lifting plate 501 to rise. When the lifting plate 501 rises, it pushes the sliding support plates 408 at the top of the lifting plate 501 to rise. And a limiting shaft 411 is fixedly connected between the two sliding support plates 408. When the lifting plate 501 pushes the sliding support plates 408 to rise, the limiting shaft 411 rises along the fixed support plate 3 opened by the fixed support plate 3, making the sliding support plates 408 rise obliquely first. Then the sliding support plates 408 push the vertical plate 401 to move, so that the two electromagnets 405 on one side of the rotating disk 402 respectively move to the upper and lower sides of the screen plate, and the screen plate is clamped by the electromagnets 405. And as the vertical plate 401 rises, the gear 400 on the outside of the rotating rod 403 is engaged with the rack 304. Then the rotating rod 403 rotates through the one-way damping effect in the one-way damping bearing, and the rotating rod 403 drives the rotating disk 402 to rotate. Then the screen plate is flipped, so as to test the other side of the screen plate.

[0073] It should be noted that a rubber ring can be arranged at the place where the rotating rod 403 penetrates through the vertical plate 401 to ensure the stability of the rotating rod 403 after rotation.

[0074] In this embodiment, as Figure 6 、 Figure 7 and Figure 8As shown in the figure, contact plates 503 are fixedly connected to both sides of the outer side of the fixed support plate 3. Mounting seats 409 are fixedly connected to the tops of the two sliding support plates 408. A touch switch 410 is fixedly connected to one side of the mounting seat 409 close to the contact plate 503. When the touch switch 410 moves horizontally along with the sliding support plate 408 and drives the two electromagnets 405 to move to the upper and lower sides of the screen plate, the touch switch 410 contacts the contact plate 503, controlling the two electromagnets 405 to be energized and adsorbed to clamp the screen plate.

[0075] During specific implementation, when the sliding support plate 408 inclines and rises along the limit groove 302 on the fixed support plate 3, the touch switch 410 on one side of the mounting seat 409 contacts the contact plate 503. Then the touch switch 410 is turned on, enabling the electromagnet 405 to be energized, causing the two electromagnets 405 to adsorb to each other, quickly clamping the screen plate and driving the screen plate to rise. When the lifting plate 501 descends, the touch switch 410 no longer contacts the contact plate 503, so the electromagnet 405 is de-energized, releasing the clamping and fixing of the screen plate, and the clamping member mounting plate 404 moves away from the screen plate to avoid blocking the detection of the screen plate by the clamping member. Moreover, through the adsorption and clamping of the electromagnet 405, screen plates of different thicknesses can be clamped and fixed, avoiding manual adjustment and having a wider application range.

[0076] In this embodiment, a connecting plate 10 is fixedly connected between the lifting plates 501, and a second detection head 1001 is fixedly connected to the tops of the two connecting plates 10.

[0077] During specific implementation, when the screen plate rises and flips along with the clamping member, during the flipping process, through the second detection head 1001 arranged between the two lifting plates 501, the second detection head 1001 detects the flipping of the screen plate. Through the comparison of the two detections, errors are avoided, ensuring the accuracy of the detection.

[0078] Embodiment Three: As Figure 9 shown in the figure, two sliding rods 601 are fixedly connected to one side of the fixed bracket 6. Two sliding seats 602 are slidably connected to the outer sides of the two sliding rods 601. The two sliding seats 602 are fixedly connected to the bottom of the comparison screen plate 7, and a second spring 603 for pushing the sliding seat 602 to move below the first detection head 204 is fixedly connected between the sliding seat 602 and one end of the sliding rod 601.

[0079] The traction member includes:

[0080] Two fixed rods 803, which are respectively fixedly connected to both sides of the lifting plate 501;

[0081] Two traction steel wires 802, with both ends of the traction steel wires 802 fixedly connected to the fixed rods 803 and the sliding seats 602 respectively, and a guide wheel 801 for guiding the traction steel wire 802 is rotatably connected to the outside of the fixed bracket 6.

[0082] During specific implementation, when the lifting plate 501 rises, the traction wire 802 that pulls the sliding seat 602 starts to loosen. At this time, the previously compressed second spring 603 starts to push the sliding seat 602 to move. The sliding seat 602 drives the comparison screen plate 7 to move, so that the two comparison screen plates 7 move below the first detection head 204. The first detection head 204 detects the comparison screen plate 7, thereby determining whether the first detection head 204 is faulty, and comparing with the results detected by the second detection head 1001 for further judgment.

[0083] Example 4, as Figure 9 、 Figure 10 and Figure 11 shown, a jet cylinder 9 is fixedly connected to the side of the comparison screen plate 7 away from the fixed bracket 6. A nozzle 901 is arranged outside the jet cylinder 9, and a jet groove 902 is opened on the outside of the jet cylinder 9. A rotating cylinder 903 is rotatably connected inside the jet cylinder 9. An opening 904 is opened on the outside of the rotating cylinder 903. One end of the rotating cylinder 903 is fixedly communicated with an air duct 907. The air duct 907 penetrates through the jet cylinder 9 and is connected to an external jet device. A micro motor 905 is fixed inside the jet cylinder 9. The output shaft of the micro motor 905 is fixedly connected to the rotating cylinder 903, which is used to drive the switching of the opening 904 to communicate with the nozzle 901 and the jet groove 902 respectively.

[0084] During specific implementation, when the two comparison screen plates 7 move below the first detection head 204, the comparison screen plate 7 drives the jet cylinder 9 to move to the upper part of the screen plate. When the screen plate rises, by starting an external jet device to supply gas to the air duct 907, the gas enters the inside of the rotating cylinder 903. By controlling the micro motor 905 to drive the rotating cylinder 903 to rotate, the opening 904 opened on the outside of the rotating cylinder 903 faces the jet groove 902, so that the gas is discharged downward through the jet groove 902, thereby cleaning the dust on the screen plate. And as the screen plate flips, the other side of the screen plate can also be jet-cleaned to ensure that the screen plate remains clean during detection and avoid detection errors.

[0085] When the first detection head 204 has an incorrect detection during the detection by the second detection head 1001 and the test of the comparison screen plate 7, the rotating cylinder 903 is rotated, the opening 904 faces the nozzle 901, and the gas jets towards the first detection head 204 through the nozzle 901, thereby blowing the dust on the first detection head 204, improving the detection accuracy and avoiding errors.

[0086] In this embodiment, a cleaning frame 604 is arranged on the top of the comparison screen plate 7. A brush for cleaning the comparison screen plate 7 is arranged at the bottom of the cleaning frame 604, and both ends of the cleaning frame 604 are fixedly connected to the sliding seat 602 respectively.

[0087] During specific implementation, when the comparison stencil 7 is reset by the second spring 603, the comparison stencil 7 contacts the brush at the bottom of the cleaning frame 604, thereby cleaning the comparison stencil 7 to prepare for the subsequent detection and calibration.

[0088] A method for visual inspection of the appearance quality of a printing stencil is also provided, including the following steps:

[0089] Step 1: Place the stencil on the conveying device for transportation. When it is conveyed below the first detection head 204, the first detection head 204 performs visual inspection on the upper part of the stencil.

[0090] Step 2: Then, start the linear module inside the lifting frame 5 to drive the lifting plate 501 to rise. The lifting plate 501 drives the clamping member on one side of the vertical plate 401 through the connecting member, causing the clamping member to move to the outside of the stencil and clamp the stencil. And as the lifting plate 501 rises, it drives the clamping member to flip.

[0091] Step 3: During the rising process of the lifting plate 501, the traction member releases the comparison stencils 7 at the top of the fixed bracket 6, and the two comparison stencils 7 move below the first detection head 204 to test the first detection head 204.

[0092] Step 4: After the test is completed, the lifting plate 501 drives the flipped stencil to descend, and the clamping member moves away from the outside of the stencil, causing the stencil to be placed back on the conveying device. Then, the first detection head 204 detects the other side of the stencil.

[0093] Meanwhile, the content not described in detail in this specification belongs to the well-known prior art in the art.

[0094] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0095] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the invention to the specific implementation manners described. Obviously, according to the content of this specification, many modifications and variations can be made. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A visual inspection device for the appearance quality of a printing screen plate, comprising a support cabinet (1), wherein a conveying device for conveying the screen plate is arranged on the top of the support cabinet (1), and is characterized in that, Further comprising: Two fixed support plates (3), which are respectively fixedly connected to both sides of the top of the support cabinet (1) and are respectively arranged on both sides of the conveying device. A limiting groove (302) is formed on the outer side of the fixed support plate (3). Vertical plates (401) are arranged on the front sides of the two fixed support plates (3), and clamping members for clamping the screen plate are arranged on the opposite sides of the two vertical plates (401); A lifting plate (501) sleeved on the outer side of the fixed support plate (3). A lifting frame (5) is fixedly connected to the top of the support cabinet (1). A linear module for lifting the lifting plate (501) is arranged in the lifting frame (5). A connecting member is arranged between the lifting plate (501) and the vertical plate (401). When the lifting plate (501) drives the vertical plate (401) to rise through the connecting member, the clamping member is flipped; A first detection head (204) for detecting the screen plate. The first detection head (204) is fixedly connected to the support cabinet (1) through a fixed frame (203); A fixed bracket (6) fixedly connected to the outer side of the lifting frame (5). A comparison screen plate (7) for testing the first detection head (204) is arranged on the top of the fixed bracket (6). A traction member is arranged on the outer side of the lifting plate (501). When the lifting plate (501) rises, the comparison screen plate (7) is released and moves below the first detection head (204); The clamping member includes: A rotating disk (402) arranged on one side of the vertical plate (401). A rotating rod (403) is fixedly connected to one side of the rotating disk (402). The rotating rod (403) penetrates through the vertical plate (401) and is rotatably connected to the vertical plate (401); Two mounting plates (404), both of which are fixedly connected to one side of the rotating disk (402) and are arranged up and down opposite to each other; Two electromagnets (405), which are respectively arranged on the opposite sides of the two mounting plates (404). The two electromagnets (405) are magnetically adsorbed to each other when energized. A telescopic rod (406) and a first spring (407) are fixedly connected between the mounting plate (404) and the electromagnet (405). The first spring (407) is sleeved on the outer side of the telescopic rod (406); A gear (400) sleeved on the outer side of the rotating rod (403), and the gear (400) is connected to the rotating rod (403) through a one-way damping bearing; The connecting member includes: Two sliding support plates (408), which are respectively fixedly connected to both sides of the bottom of the vertical plate (401) and respectively extend to both sides of the top of the lifting plate (501). Sliding blocks (500) are fixedly connected to the outer sides of the two sliding support plates (408); Two sliding seats (502), which are fixedly connected to both sides of the top of the lifting plate (501) and respectively penetrate through the two sliding blocks (500) and are slidably connected to the sliding blocks (500); The limiting shaft (411) is fixedly connected between two sliding support plates (408), and the limiting shaft (411) extends into the limiting groove (302) formed inside the fixed support plate (3) and is slidably engaged with the fixed support plate (3). The rack (304) is fixedly connected to the outside of the fixed support plate (3). The rack (304) is engaged with the gear (400). When the rotating rod (403) drives the gear (400) to rise, the rotating rod (403) rotates 180 degrees through the damping of the one-way damping bearing.

2. The visual inspection device for the appearance quality of a printing screen plate according to claim 1, wherein: Contact plates (503) are fixedly connected to both sides of the outside of the fixed support plate (3). Mounting seats (409) are fixedly connected to the tops of the two sliding support plates (408). A touch switch (410) is fixedly connected to one side of the mounting seat (409) close to the contact plate (503). When the touch switch (410) moves horizontally along with the sliding support plate (408) and drives the two electromagnets (405) to move to the upper and lower sides of the screen plate, the touch switch (410) contacts the contact plate (503) to control the two electromagnets (405) to be energized and adsorbed to clamp the screen plate.

3. An appearance quality visual inspection device for a printing screen plate according to claim 1, characterized in that: Two sliding rods (601) are fixedly connected to one side of the fixed bracket (6). Two sliding seats (602) are slidably connected to the outside of the two sliding rods (601). The two sliding seats (602) are fixedly connected to the bottom of the comparison screen plate (7). A second spring (603) for pushing the sliding seat (602) to move below the first detection head (204) is fixedly connected between the sliding seat (602) and one end of the sliding rod (601).

4. The appearance quality visual inspection device for a printing screen plate according to claim 3, wherein: The traction member includes: Two fixed rods (803) are respectively fixedly connected to both sides of the lifting plate (501). Two traction steel wires (802), the two ends of the traction steel wire (802) are respectively fixedly connected to the fixed rod (803) and the sliding seat (602), and a guide wheel (801) for guiding the traction steel wire (802) is rotatably connected to the outside of the fixed bracket (6).

5. The visual inspection device for the appearance quality of a printing screen plate according to claim 4, characterized in that: A connecting plate (10) is fixedly connected between the lifting plates (501). A second detection head (1001) is fixedly connected to the tops of the two connecting plates (10).

6. The visual inspection device for the appearance quality of a printing screen plate according to claim 1, characterized in that: A jet tube (9) is fixedly connected to one side of the comparison screen plate (7) away from the fixed bracket (6). A nozzle (901) is arranged outside the jet tube (9). An air jet groove (902) is formed in the outside of the jet tube (9). A rotating tube (903) is rotatably connected to the inside of the jet tube (9). An opening (904) is formed in the outside of the rotating tube (903). One end of the rotating tube (903) is fixedly communicated with an air duct (907). The air duct (907) penetrates through the jet tube (9) and is connected to an external air jet device. A micro motor (905) is fixed inside the jet tube (9). The output shaft of the micro motor (905) is fixedly connected to the rotating tube (903) for driving the switching of the communication between the opening (904) and the nozzle (901) and the air jet groove (902).

7. An appearance quality visual inspection device for a printing screen plate according to claim 6, characterized in that: A cleaning frame (604) is provided at the top of the comparison stencil (7). A brush for cleaning the comparison stencil (7) is provided at the bottom of the cleaning frame (604), and both ends of the cleaning frame (604) are fixedly connected to the sliding seats (602) respectively.

8. A method for visual inspection of the appearance quality of a printing screen plate, applicable to a visual inspection device for the appearance quality of a printing screen plate as described in any one of claims 1 to 7, characterized in that, It includes the following steps: Step 1: Place the stencil on the conveying device for conveying. When it is conveyed below the first detection head (204), the first detection head (204) performs visual detection on the upper part of the stencil. Step 2: Then, start the linear module inside the lifting frame (5) to drive the lifting plate (501) to rise, so that the lifting plate (501) drives the clamping member on one side of the vertical plate (401) through the connecting member to move, making the clamping member move to the outside of the stencil and clamp the stencil. And as the lifting plate (501) rises, it drives the clamping member to flip. Step 3: When the lifting plate (501) is rising, the traction member releases the comparison stencil (7) at the top of the fixed bracket (6), and the two comparison stencils (7) move below the first detection head (204) to test the first detection head (204). Step 4: After the test is completed, the lifting plate (501) drives the flipped stencil to descend, and the clamping member moves away from the outside of the stencil, so that the stencil is placed on the conveying device again, and then the first detection head (204) detects the other side of the stencil.

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