Visual inspection device and method for appearance quality of printing screen

Abstract

The invention discloses an appearance quality visual inspection device for a printing screen printing plate, and relates to the technical field of visual inspection, the appearance quality visual inspection device comprises a supporting cabinet, a conveying device for conveying the screen printing plate is arranged at the top of the supporting cabinet, and the appearance quality visual inspection device further comprises two fixed supporting plates which are fixedly connected with the two sides of the top of the supporting cabinet respectively; the two fixing supporting plates are arranged on the two sides of the conveying device correspondingly, limiting grooves are formed in the outer sides of the two fixing supporting plates, vertical plates are arranged on the front sides of the two fixing supporting plates correspondingly, and clamping pieces used for clamping the screen printing plate are arranged on the opposite sides of the two vertical plates correspondingly; after testing is completed, the lifting plate drives the overturned screen to descend, the clamping piece is far away from the outer side of the screen, the screen is placed on the conveying device again, then the other side of the screen is detected through the first detection head, therefore, it is guaranteed that the two sides of the screen are detected, it is avoided that conveying of the screen on the other side needs to be detected repeatedly, and the detection efficiency is improved. And when the screen printing plate is overturned every time, the first detection head carries out self-test once, so that the test accuracy is ensured.

Description

Technical Field

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

[0002] ‌Electrode screen is a screen structure used for printing electrodes, which is widely used in the manufacturing process of electrochemical sensors, solar cells, etc. ‌Electrode screen is usually composed of a screen frame and a mesh cloth. The mesh cloth is designed with specific patterns or holes to accurately transfer conductive ink or other materials to the substrate during the printing process to form the desired electrode structure. This printing technology has the advantages of being simple and fast, suitable for a variety of printing materials and shapes, and capable of mass production of electrodes with guaranteed consistency. A new type of solar cell printing screen detection platform disclosed in a patent application with reference publication number CN204575552U includes a lamp tube box with an open top and a lamp tube, wherein the lamp tube is built into the lamp tube box to gather light, and the edge of the open mouth is turned outward into 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.

[0003] When testing the printing screen, in order to avoid errors, both sides of the test screen need to be tested. The test camera can be used to shoot and test both sides respectively, and the test is performed on the conveying equipment. If after each test on one side, it needs to be flipped, re-transported on the conveying equipment and then tested on the other side, the test efficiency is reduced.

[0004] Therefore, it is necessary to provide a device and method for visually inspecting the appearance quality of a printing screen to solve the above technical problems. Summary of the invention

[0005] The object of the present invention is to provide a device and method for visually inspecting the appearance quality of a printing screen, so as to solve the problems of the defects of the prior art mentioned in the above background technology.

[0006] Based on the above ideas, the present invention provides the following technical solutions: a visual inspection device for the appearance quality of a printing screen, comprising a support cabinet, a conveying device for conveying the screen is arranged on the top of the support cabinet, and further comprising: Two fixed support plates, the two fixed support plates are respectively fixedly connected to the two sides of the top of the support cabinet, and are respectively arranged on the two sides of the conveying device, and the outer side of the fixed support plates is provided with a limited slot, the front side of the two fixed support plates is provided with a vertical plate, and the opposite side of the two vertical plates is provided with a clamping piece for clamping the screen; A lifting plate is sleeved on the outside of the 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 in the lifting frame, a connecting piece is arranged between the lifting plate and the vertical plate, when the lifting plate drives the vertical plate to rise through the connecting piece, the clamping piece is turned over; A first detection head for detecting the screen, the first detection head being fixedly connected to the support cabinet via a fixing frame; A fixed bracket is fixedly connected to the outside of the lifting frame, and a comparison screen for testing the first detection head is arranged on the top of the fixed bracket. A traction member is arranged on the outside of the lifting plate. When the lifting plate rises, the comparison screen is released and moved to below the first detection head.

[0007] As a further solution of the present invention: the clamping member comprises: A rotating disk is arranged on one side of the vertical plate, one side of the rotating disk is fixedly connected with a rotating rod, the rotating rod penetrates the vertical plate and is rotatably connected to the vertical plate; Two mounting plates, both of which are fixedly connected to one side of the rotating disk, and the two mounting plates are arranged opposite to each other up and down; Two electromagnets, the two electromagnets are respectively arranged on opposite sides of the two mounting plates, the two electromagnets are energized to magnetically attract each other, and a telescopic rod and a first spring are fixedly connected between the mounting plate and the electromagnets, and the first spring is sleeved on the outside of the telescopic rod; The gear is sleeved on the outside of the rotating rod, and the gear and the rotating rod are connected through a one-way damping bearing.

[0008] As a further solution of the present invention: the connecting piece includes: Two sliding support plates, the two sliding support plates are respectively fixedly connected to the two sides of the bottom of the vertical plate, and the two sliding support plates extend to the two sides of the top of the lifting plate respectively, and the outer sides of the two sliding support plates are fixedly connected with sliding blocks; 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 the two sliding blocks and are slidably connected to the sliding blocks; A limit shaft, which is fixedly connected between the two sliding support plates, and extends into a limit groove provided inside the fixed support plate, and is slidably matched with the fixed support plate; The rack is fixedly connected to the outer side of the fixed support plate, and the rack is meshed with the gear. When the rotating rod drives the gear to rise, the rotating rod is rotated 180 degrees through the damping of the one-way damping bearing.

[0009] 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, and a touch switch is fixedly connected to the side of the mounting seat close to the contact plate. When the touch switch moves horizontally with the sliding support plate and drives the two electromagnets to move to the upper and lower sides of the screen, the touch switch contacts the contact plate, controlling the two electromagnets to be energized to adsorb and clamp the screen.

[0010] As a further solution of the present invention: two sliding rods are fixedly connected to one side of the fixed bracket, 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, and a second spring is fixedly connected between the sliding seat and one end of the sliding rod for pushing the sliding seat to move below the first detection head.

[0011] As a further solution of the present invention: the traction member includes: Two fixing rods, the two fixing rods are respectively fixedly connected to two sides of the lifting plate; Two traction steel wires, both ends of which are fixedly connected to a fixed rod and a sliding seat respectively, and a guide wheel for guiding the traction steel wires is rotatably connected to the outer side of the fixed bracket.

[0012] 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 top of the two connecting plates.

[0013] As a further solution of the present invention: the comparison screen is fixedly connected to a jet cylinder on the side away from the fixed bracket, a nozzle for alignment is provided on the outside of the jet cylinder, and a jet groove is opened on the outside of the jet cylinder, and a rotating cylinder is rotatably connected to the inside of the jet cylinder, and an opening is opened on the outside of the rotating cylinder, one end of the rotating cylinder is fixedly connected to an air guide pipe, the air guide pipe passes through the jet cylinder and is connected to an external jet device, a micro motor is fixed inside the jet cylinder, and the output shaft of the micro motor is fixedly connected to the rotating cylinder, which is used to drive the switching of the opening nozzle and the jet groove.

[0014] As a further solution of the present invention: a cleaning frame is arranged on the top of the comparison screen, a brush for cleaning the comparison screen is arranged at the bottom of the cleaning frame, and both ends of the cleaning frame are fixedly connected to the slide seat respectively.

[0015] A method for visually inspecting the appearance quality of a printing screen, comprising the following steps: Step 1: Place the screen on a conveyor for transport. When the screen is transported to the bottom of the first inspection head, the first inspection head performs a visual inspection on the upper part of the screen. Step 2: Start the linear module inside the lifting frame to drive the lifting plate to rise, so that the lifting plate drives the clamping member on one side of the vertical plate to move through the connecting member, so that the clamping member moves to the outside of the screen and clamps the screen, and as the lifting plate rises, the clamping member is driven to flip; Step 3: When the lifting plate is rising, the traction member releases the comparison screen on the top of the fixed bracket, and the two comparison screens move to the bottom of the first detection head to test the first detection head; Step 4: After the test is completed, the lifting plate drives the flipped screen to descend, and the clamping member is away from the outside of the screen, so that the screen is placed on the conveying device again, and then the other side of the screen is inspected by the first detection head.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. After the test is completed, the lifting plate drives the flipped screen to descend, and the clamping part is away from the outside of the screen, so that the screen is placed back on the conveying device, and then the other side of the screen is inspected by the first detection head, thereby ensuring that both sides of the screen are inspected, avoiding the need to repeatedly transport and inspect the other side of the screen, and each time the screen is flipped, the first detection head performs a self-test to ensure the accuracy of the test.

[0017] 2. The touch switch is turned on, so that the electromagnet is energized, and the two electromagnets are attracted to each other, so as to quickly clamp the screen and drive the screen to rise. When the lifting plate descends, the touch switch and the contact plate are no longer in contact, so the electromagnet is powered off, and the clamping fixation of the screen is released. At the same time, the clamping part mounting plate is away from the screen to avoid the clamping part from blocking the detection of the screen. In addition, through the adsorption and clamping of the electromagnet, screens of different thicknesses can be clamped and fixed to avoid manual adjustment, and the scope of application is wider.

[0018] 3. By controlling the micro motor to drive the rotating cylinder to rotate, the opening on the outside of the rotating cylinder faces the jet slot, so that the gas is discharged downward through the jet slot, thereby cleaning the dust on the screen. And as the screen is turned over, the other side of the screen can also be cleaned by jet, ensuring that the screen remains clean during detection and avoiding detection errors.

[0019] 4. When the first detection head makes an erroneous detection during the test of the second detection head and the comparison of the screen, the rotating cylinder is rotated with the opening facing the nozzle, and the gas is sprayed toward the first detection head through the nozzle, thereby blowing dust from the first detection head, improving the detection accuracy and avoiding errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the transmission equipment of the present invention; Figure 3 It is a schematic structural diagram of the first detection head of the present invention; Figure 4It is a schematic diagram of the fixed support plate structure of the present invention; Figure 5 It is a schematic diagram of the comparative screen structure of the present invention; Figure 6 It is a schematic diagram of the structure of the clamping member of the present invention; Figure 7 The present invention Figure 5 A schematic diagram of the enlarged structure of part A; Figure 8 The present invention Figure 5 A schematic diagram of the enlarged structure of part B; Fig. 9 It is a schematic diagram of the structure of the fixing bracket of the present invention; Fig.10 It is a schematic diagram of the structure of the jet tube of the present invention; Fig.11 It is a schematic diagram of the cross-sectional structure of the jet tube of the present invention.

[0022] 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 rack; 7, contrast screen; 801, guide wheel; 802, traction wire; 803, fixed rod; 9, jet cylinder; 901, nozzle; 902, jet slot; 903, rotating cylinder; 904, opening; 905, micro motor; 907, air guide tube; 10, connecting plate; 1001, second detection head. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship 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 therefore should not be understood as limiting the present invention.

[0025] like Figures 1 to 11As shown, a device and method for visually inspecting the appearance quality of a printing screen include the following embodiments: Embodiment 1: Figure 1 , Figure 2 and Figure 3 As shown, it includes a support cabinet 1, a conveying device for conveying a screen is arranged on the top of the support cabinet 1, and the conveying device includes two sets of opposite first conveying devices 201 and second conveying devices 202. The two ends of the screen are placed on the two sets of opposite first conveying devices 201 and second conveying devices 202 for conveying. The conveying method of the second conveying device 202 and the first conveying device 201 can adopt a transmission 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, and also includes: Two fixed support plates 3, the two fixed support plates 3 are respectively fixedly connected to the two sides of the top of the support cabinet 1, and are respectively arranged on the two sides of the conveying device, the fixed support plates 3 are provided with limited slots 302 on the outer sides, the two fixed support plates 3 are both provided with vertical plates 401 on the front sides, and the two vertical plates 401 are both provided with clamping parts for clamping the screen on the opposite sides; The lifting plate 501 is sleeved on the outside of the fixed support plate 3, and the top of the support cabinet 1 is fixedly connected with a lifting frame 5. 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 piece 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 piece, the clamping piece is turned over; A first detection head 204 for detecting the screen, the first detection head 204 is fixedly connected to the support cabinet 1 through a fixing frame 203; The fixed bracket 6 is fixedly connected to the outside of the lifting frame 5, and a comparison screen 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 outside of the lifting plate 501. When the lifting plate 501 rises, the comparison screen 7 is released and moved to the bottom of the first detection head 204.

[0026] In specific implementation, the screen is placed on the conveying device for transportation. When it is transported to the bottom of the first detection head 204, the first detection head 204 performs a visual inspection on the upper part of the screen, and then the lifting plate 501 is driven to rise by starting the linear module inside the lifting frame 5, so that the lifting plate 501 drives the clamping member on one side of the vertical plate 401 to move through the connecting member, so that the clamping member moves to the outside of the screen and clamps the screen, and as the lifting plate 501 rises, the clamping member is driven to flip over; when the lifting plate 501 rises, the traction member releases the contrast at the top of the fixed bracket 6 Screen 7 and two comparison screens 7 are moved to the bottom of 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 to descend, and the clamping part is away from the outside of the screen, so that the screen is placed back on the conveying device, and then the other side of the screen is detected by the first detection head 204, thereby ensuring that both sides of the screen are detected, avoiding the need to repeatedly detect the other side of the screen, and each time the screen is flipped, the first detection head 204 performs a self-test to ensure the accuracy of the test.

[0027] Embodiment 2: Figure 4 , Figure 5 and Figure 6 As shown, the clamping member includes: A rotating disk 402 is disposed on one side of the vertical plate 401, and a rotating rod 403 is fixedly connected to one side of the rotating disk 402. The rotating rod 403 penetrates 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 the two mounting plates 404 are arranged opposite to each other up and down; Two electromagnets 405, the two electromagnets 405 are respectively arranged on opposite sides of the two mounting plates 404, the two electromagnets 405 are energized to be magnetically attracted to each other, and a telescopic rod 406 and a first spring 407 are fixedly connected between the mounting plates 404 and the electromagnets 405, and the first spring 407 is sleeved on the outside of the telescopic rod 406; The gear 400 is sleeved on the outside of the rotating rod 403, and the gear 400 and the rotating rod 403 are connected through a one-way damping bearing.

[0028] Connectors include: Two sliding support plates 408, the two sliding support plates 408 are respectively fixedly connected to the two sides of the bottom of the vertical plate 401, and the two sliding support plates 408 extend to the two sides of the top of the lifting plate 501, and the outer sides of the two sliding support plates 408 are fixedly connected with sliding blocks 500; 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 the two sliding blocks 500 and are slidably connected with the sliding blocks 500; A limiting shaft 411, which is fixedly connected between the two sliding support plates 408, and extends into the limiting groove 302 provided inside the fixed support plate 3, and is slidably matched with the fixed support plate 3; The rack 304 is fixedly connected to the outer side of the fixed support plate 3, and the rack 304 is meshed with the gear 400. When the rotating rod 403 drives the gear 400 to rise, the rotating rod 403 is rotated 180 degrees by the damping of the one-way damping bearing.

[0029] In specific implementation, when the screen needs to be flipped, the lifting plate 501 is driven to rise by starting the linear module inside the lifting frame 5. When the lifting plate 501 rises, the sliding support plate 408 on the top of the lifting plate 501 is pushed to rise, and the limiting axis 411 is fixedly connected between the two sliding support plates 408. When the lifting plate 501 pushes the sliding support plate 408 to rise, the limiting axis 411 rises along the fixed support plate 3 opened by the fixed support plate 3, so that the sliding support plate 408 first tilts and rises, and then slides The support plate 408 pushes the vertical plate 401 to move, so that the two electromagnets 405 on one side of the rotating disk 402 move to the upper and lower sides of the screen respectively, and the screen is clamped by the electromagnets 405. As the vertical plate 401 rises, the gear 400 on the outside of the rotating rod 403 engages with the rack 304, and then the rotating rod 403 is rotated through the one-way damping effect in the one-way damping bearing, and the rotating rod 403 drives the rotating disk 402 to rotate, and then the screen is flipped, so as to test the other side of the screen.

[0030] It is worth mentioning that a rubber ring may be provided at the place where the rotating rod 403 passes through the vertical plate 401 to ensure that the rotating rod 403 remains stable after rotating.

[0031] In this embodiment, Figure 6 , Figure 7 and Figure 8 As shown, 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, and a touch switch 410 is fixedly connected to the mounting seat 409 close to the contact plate 503. When the touch switch 410 moves horizontally with the sliding support plate 408 and drives the two electromagnets 405 to move to the upper and lower sides of the screen, the touch switch 410 contacts the contact plate 503, controlling the two electromagnets 405 to be energized to adsorb and clamp the screen.

[0032] In specific implementation, when the sliding support plate 408 is tilted and ascended 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, and then the touch switch 410 is turned on, so that the electromagnet 405 is energized, and the two electromagnets 405 are adsorbed to each other, thereby quickly clamping the screen and driving the screen to rise. When the lifting plate 501 descends, the touch switch 410 and the contact plate 503 are no longer in contact, so that the electromagnet 405 is powered off, the clamping and fixation of the screen is released, and the clamping member mounting plate 404 is away from the screen to avoid the clamping member from blocking the detection of the screen, and through the adsorption and clamping of the electromagnet 405, screens of different thicknesses can be clamped and fixed to avoid manual adjustment, and the scope of application is wider.

[0033] 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 top of the two connecting plates 10 .

[0034] In specific implementation, when the screen flips as the clamping member rises, the second detection head 1001 set between the two lifting plates 501 detects the flipping of the screen during the flipping process. By comparing the two detections, errors are avoided and the accuracy of the detection is guaranteed.

[0035] Embodiment 3: Fig. 9 As shown, two sliding rods 601 are fixedly connected to one side of the fixed bracket 6, and 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 7, and a second spring 603 is fixedly connected between the sliding seat 602 and one end of the sliding rod 601 to push the sliding seat 602 to move downward from the first detection head 204.

[0036] The traction parts include: Two fixing rods 803, the two fixing rods 803 are respectively fixedly connected to two sides of the lifting plate 501; Two traction steel wires 802 , both ends of which are fixedly connected to the fixed rod 803 and the sliding seat 602 respectively, and the outer side of the fixed bracket 6 is rotatably connected with a guide wheel 801 for guiding the traction steel wires 802 .

[0037] In specific implementation, when the lifting plate 501 rises, the traction wire 802 that is pulling the slide 602 begins to relax. At this time, the second spring 603 that was compressed before begins to push the slide 602 to move, and the slide 602 drives the comparison screen 7 to move, so that the two comparison screens 7 move to the bottom of the first detection head 204. The comparison screen 7 is detected by the first detection head 204 to determine whether the first detection head 204 is faulty, and compared with the detection result of the second detection head 1001 to further determine.

[0038] Embodiment 4, as Fig. 9 , Fig.10 and Fig.11 As shown, a jet cylinder 9 is fixedly connected to the side of the contrast screen 7 away from the fixed bracket 6, a nozzle 901 is arranged on the outside of the jet cylinder 9 for aiming, a jet slot 902 is provided on the outside of the jet cylinder 9, and a rotating cylinder 903 is rotatably connected inside the jet cylinder 9, an opening 904 is provided on the outside of the rotating cylinder 903, an air guide pipe 907 is fixedly connected to one end of the rotating cylinder 903, the air guide pipe 907 passes through the jet cylinder 9 and is connected to an external jet device, a micro motor 905 is fixed inside the jet cylinder 9, and an output shaft of the micro motor 905 is fixedly connected to the rotating cylinder 903, for driving the opening 904 to switch between the nozzle 901 and the jet slot 902.

[0039] In specific implementation, when the two comparison screens 7 move toward the bottom of the first detection head 204, the comparison screen 7 drives the air jet 9 to move to the upper part of the screen. As the screen rises, the external air jet device is started to deliver gas to the air guide 907, and the gas enters the rotating cylinder 903. The rotating cylinder 903 is driven to rotate by controlling the micro motor 905. The opening 904 provided on the outer side of the rotating cylinder 903 faces the air jet slot 902, so that the gas is discharged downward through the air jet slot 902, thereby cleaning the dust on the screen. As the screen is turned over, the other side of the screen can also be cleaned by air jet, so as to ensure that the screen is kept clean during detection and avoid detection errors. When the first detection head 204 detects an error during the test of detecting and comparing the screen 7 with the second detection head 1001, the rotating cylinder 903 is rotated, the opening 904 is directed toward the nozzle 901, and the gas is sprayed toward the first detection head 204 through the nozzle 901, thereby blowing dust from the first detection head 204, improving detection accuracy and avoiding errors.

[0040] In this embodiment, a cleaning frame 604 is disposed on the top of the comparison screen 7 , a brush for cleaning the comparison screen 7 is disposed at the bottom of the cleaning frame 604 , and both ends of the cleaning frame 604 are fixedly connected to the slide seat 602 .

[0041] In a specific implementation, when the comparison screen 7 is reset by the second spring 603 , the comparison screen 7 contacts the brush at the bottom of the cleaning frame 604 , thereby cleaning the comparison screen 7 and preparing for the detection and calibration below.

[0042] A method for visually inspecting the appearance quality of a printing screen is also provided, comprising the following steps: Step 1: Place the screen on the conveyor for transportation. When the screen is transported to the bottom of the first inspection head 204, the first inspection head 204 performs visual inspection on the upper part of the screen. Step 2: 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 to move through the connecting member, so that the clamping member moves to the outside of the screen and clamps the screen, and as the lifting plate 501 rises, the clamping member is driven to flip; Step 3: When the lifting plate 501 is rising, the traction member releases the comparison screen 7 on the top of the fixed bracket 6, and the two comparison screens 7 move to the bottom of 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 screen to descend, and the clamping member is away from the outside of the screen, so that the screen is placed on the conveying device again, and then the other side of the screen is inspected by the first inspection head 204.

[0043] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0045] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for visually inspecting the appearance quality of a printing screen, comprising a support cabinet (1), a conveying device for conveying the screen being arranged on the top of the support cabinet (1), characterized in that: Also includes: Two fixed support plates (3), the two fixed support plates (3) are respectively fixedly connected to the two sides of the top of the support cabinet (1), and are respectively arranged on the two sides of the conveying device, the fixed support plates (3) are provided with limit grooves (302) on the outside, the two fixed support plates (3) are both provided with vertical plates (401) on the front sides, and the two vertical plates (401) are both provided with clamping parts for clamping the screen on the opposite sides; A lifting plate (501) is sleeved on the outside 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 piece 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 piece, the clamping piece is turned over; A first detection head (204) for detecting a screen, the first detection head (204) being fixedly connected to the support cabinet (1) via a fixing frame (203); A fixed bracket (6) is fixedly connected to the outside of the lifting frame (5), and a comparison screen (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 outside of the lifting plate (501). When the lifting plate (501) rises, the comparison screen (7) is released and moved to the bottom of the first detection head (204).

2. A visual inspection device for the appearance quality of a printing screen according to claim 1, characterized in that: The clamping member comprises: A rotating disk (402) is disposed on one side of the vertical plate (401), and a rotating rod (403) is fixedly connected to one side of the rotating disk (402). The rotating rod (403) penetrates the vertical plate (401) and is rotatably connected to the vertical plate (401); Two mounting plates (404), both mounting plates (404) are fixedly connected to one side of the rotating disk (402), and the two mounting plates (404) are arranged opposite to each other up and down; Two electromagnets (405), the two electromagnets (405) are respectively arranged on opposite sides of two mounting plates (404), the two electromagnets (405) are magnetically attracted 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 electromagnets (405), and the first spring (407) is sleeved on the outside of the telescopic rod (406); The gear (400) is sleeved on the outside of the rotating rod (403), and the gear (400) and the rotating rod (403) are connected via a one-way damping bearing.

3. A visual inspection device for the appearance quality of a printing screen according to claim 2, characterized in that: The connecting piece comprises: Two sliding support plates (408), the two sliding support plates (408) are respectively fixedly connected to the two sides of the bottom of the vertical plate (401), and the two sliding support plates (408) extend to the two sides of the top of the lifting plate (501), and the outer sides of the two sliding support plates (408) are fixedly connected with sliding blocks (500); Two sliding seats (502), the two sliding seats (502) are fixedly connected to the top two sides of the lifting plate (501), and the two sliding seats (502) respectively penetrate the two sliding blocks (500) and are slidably connected to the sliding blocks (500); 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 a limiting groove (302) provided inside the fixed support plate (3) and is slidably matched with the fixed support plate (3); The rack (304) is fixedly connected to the outer side of the fixed support plate (3), and the rack (304) is meshed with the gear (400). When the rotating rod (403) drives the gear (400) to rise, the rotating rod (403) is rotated 180 degrees through the damping of the one-way damping bearing.

4. A visual inspection device for the appearance quality of a printing screen according to claim 3, characterized in that: The fixed support plate (3) is fixedly connected to both sides of the outer side thereof with a contact plate (503), the tops of the two sliding support plates (408) are fixedly connected to a mounting seat (409), and the mounting seat (409) is fixedly connected to a touch switch (410) on one side 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, the touch switch (410) contacts the contact plate (503), and controls the two electromagnets (405) to be energized to adsorb and clamp the screen.

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

6. A visual inspection device for the appearance quality of a printing screen according to claim 5, characterized in that: The traction member comprises: Two fixing rods (803), the two fixing rods (803) are respectively fixedly connected to two sides of the lifting plate (501); Two traction steel wires (802), both ends of which are fixedly connected to the fixed rod (803) and the sliding seat (602), respectively, and a guide wheel (801) for guiding the traction steel wires (802) is rotatably connected to the outer side of the fixed bracket (6).

7. A visual inspection device for the appearance quality of a printing screen according to claim 6, characterized in that: 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).

8. The visual inspection device for the appearance quality of a printing screen according to claim 1, characterized in that: The comparison screen (7) is fixedly connected to a jet cylinder (9) on a side away from the fixed bracket (6); a nozzle (901) for alignment is arranged on the outside of the jet cylinder (9); a jet slot (902) is provided on the outside of the jet cylinder (9); a rotating cylinder (903) is rotatably connected inside the jet cylinder (9); an opening (904) is provided on the outside of the rotating cylinder (903); an air guide tube (907) is fixedly connected to one end of the rotating cylinder (903); the air guide tube (907) passes through the jet cylinder (9) and is connected to an external jet device; a micro motor (905) is fixed inside the jet cylinder (9); an output shaft of the micro motor (905) is fixedly connected to the rotating cylinder (903) and is used to drive the opening (904) to switch between the nozzle (901) and the jet slot (902).

9. A visual inspection device for the appearance quality of a printing screen according to claim 8, characterized in that: A cleaning frame (604) is arranged on the top of the comparison screen (7), a brush for cleaning the comparison screen (7) is arranged on the bottom of the cleaning frame (604), and both ends of the cleaning frame (604) are respectively fixedly connected to the slide seat (602).

10. A method for visual inspection of the appearance quality of a printing screen, applicable to a device for visual inspection of the appearance quality of a printing screen as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: placing the screen on a conveying device for conveying, and when conveyed to below the first inspection head (204), the first inspection head (204) performs a visual inspection on the upper part of the screen; Step 2: Start the internal linear module of 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) to move through the connecting member, so that the clamping member moves to the outside of the screen and clamps the screen, and as the lifting plate (501) rises, the clamping member is driven to flip; Step 3: When the lifting plate (501) is rising, the traction member releases the comparison screen (7) on the top of the fixed bracket (6), and the two comparison screens (7) move to the bottom of 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 screen to descend, and the clamping member moves away from the outside of the screen, so that the screen is placed back on the conveying device, and then the other side of the screen is inspected by the first inspection head (204).

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