Automatic service life testing device and testing method based on printing screen

Abstract

The invention discloses an automatic service life testing device and method based on a printing screen, and relates to the technical field of testing devices. By arranging the first printing screen positioning mechanism, the second printing screen positioning mechanism and the third printing screen positioning mechanism, a plurality of printing screens in the same batch can be clamped, fixed and tested at the same time, and the plurality of tested printing screens can be contrasted with one another, so that a more accurate test result can be obtained; the influence of accidental errors on the test result is avoided, and the credibility of the test result is improved; the projection part is arranged in the printing screen positioning mechanism, so that the outline of the printing screen which is subjected to service life test and is deformed can be projected on the projection plate by using the lamp panel, and the maximum deformation quantity of the printing screen relative to the initial state can be calculated by observing the position of the projection outline relative to the scale line slot II; and a basis is provided for subsequently estimating the service life of other printing screens of the same batch and the same model.

Description

Technical Field

[0001] The invention relates to the technical field of testing devices, and in particular to an automatic life testing device and a testing method based on a printing screen. Background Art

[0002] A printing screen is a porous silk screen template, which is usually made by stretching silk, nylon, polyester fiber, stainless steel wire, copper wire and other materials on a screen frame, and then further tightening and fixing it. During printing, the ink leaks through the hollowed-out part of the image and text on the screen template onto the substrate, forming the required image or text. It is widely used in the printing of various logos, trademarks, text and graphics.

[0003] An automatic screen service life testing machine disclosed in a patent application with reference publication number CN203037557U includes a scraper, a linear cylinder, a control device, and a frame. The linear cylinder controls the scraper to move left and right to simulate the printing process. The control device can control the linear cylinder. The control device can set the scraper movement speed and running time, so as to scientifically and effectively obtain the screen fatigue resistance and then the service life of the screen.

[0004] When the existing testing device performs a life test on the printing screen, the screen in the printing screen is subjected to the force of the scraper for a long time, causing its tension to change and causing a certain degree of irregular changes in the pattern. As the number of screen test prints increases, the deformation continues to increase. When the deformation reaches a certain level, the screen can no longer be used and is scrapped. The deformation of the screen test process is difficult to measure using conventional measuring tools, which makes it impossible to accurately obtain the deformation value of the printing screen during the test after the test, and thus it is difficult to predict the service life of the same batch of printing screens. In addition, the force of the scraper relative to the printing screen cannot be controlled during the test, and it is impossible to truly simulate the use of the printing screen in different environments. For example, referring to an automatic screen service life testing machine with publication number CN203037557U, the device only tests the life of the screen by reciprocating movement of the scraper on the screen, and it is difficult to accurately measure the deformation of the screen after the test, and thus it is difficult to predict the service life of the screen based on the test results. In addition, the distance between the scraper and the screen is a fixed height, and it is difficult to simulate different scraping forces of the scraper, which makes the credibility of the test results low.

[0005] Therefore, the present invention proposes an automated life test device and test method based on a printing screen to solve the above problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an automated life test device and test method based on a printing screen, which solves the problem that when the existing test device performs a life test on the printing screen, the screen in the printing screen is subjected to the force of a scraper for a long time, so that its tension changes and causes a certain degree of irregular changes in the pattern. As the number of screen test prints increases, the deformation continues to increase. When the deformation reaches a certain level, the screen can no longer be used and is scrapped. The deformation in the screen test process is difficult to measure using conventional measuring tools, which results in the inability to accurately obtain the deformation value of the printing screen generated during the test process after the test, and further makes it difficult to predict the service life of the printing screens of the same batch. In addition, during the test process, it is impossible to control the force of the scraper relative to the printing screen, and it is difficult to simulate the different scraping forces of the scraper, resulting in low credibility of the test result.

[0007] To achieve the above objectives, the present invention is implemented by the following technical solutions: an automated life test device based on a printed screen, comprising a test cabinet and a cabinet door rotatably arranged on the front of the test cabinet through a hinge, wherein a printed screen to be tested is arranged inside the test cabinet, and further comprising: The first printing screen positioning mechanism, the second printing screen positioning mechanism and the third printing screen positioning mechanism are arranged in the test cabinet at equal intervals in sequence, and are used to stably clamp the printing screen to be tested, and after the test is completed, the deformation amount of the printing screen during the test is measured by projection; The scraping simulation mechanism is arranged above the No. 1 printing screen positioning mechanism, the No. 2 printing screen positioning mechanism and the No. 3 printing screen positioning mechanism, and is used to simulate the continuous scraping action on the top of the printing screen during the printing process, so as to apply a preset friction force to the local area of ​​the top of the printing screen; The controller is fixedly arranged on the side wall of the test cabinet and is used to control the scraping frequency of the scraping simulation mechanism on the local area on the top of the printing screen and the operation of other electrical equipment.

[0008] Furthermore, the No. 1 printing screen positioning mechanism includes a supporting seat which is detachably arranged inside the test cabinet by bolts, and a clamping component for fixing the printing screen is arranged on the side wall of the supporting seat away from the cabinet door, and slide rails are fixedly arranged on the relative inner walls of the supporting seat, and a printing substrate simulation component for simulating a printing substrate is slidably arranged inside the two slide rails, and a projection component for displaying the deformation amount of the printing screen after the life test is completed is also arranged on the inner wall of the supporting seat and above the printing substrate simulation component.

[0009] Furthermore, the clamping component includes a transverse support plate fixedly arranged on the side wall of the bearing seat, and sliding grooves are provided on the upper and lower sides of the front side of the transverse support plate, and support arm assembly 1 and support arm assembly 2 are slidably arranged on both sides of the inner sides of the two sliding grooves for use with each other. The support arm assembly 1, support arm assembly 2 and the transverse support plate are locked in position by bolts, and a scale line groove 1 for displaying the position of support arm assembly 1 and support arm assembly 2 is also provided on the front side of the transverse support plate to ensure that the clamping area between support arm assembly 1 and support arm assembly 2 is always located at the top middle position of the substrate simulation component.

[0010] Furthermore, the printing material simulation component includes a support plate and sliding sleeves fixedly arranged on both sides of the outer wall of the support plate, and the two sliding sleeves are respectively slidably mounted on the outer walls of the slide rails at corresponding positions. A printing plate is fixedly arranged on the top of the support plate, and a handle for convenient pushing and pulling is also fixedly arranged on the side wall of the printing plate away from the horizontal support plate.

[0011] Furthermore, the projection component includes a deformation variable marking component and a light board detachably arranged on the inner wall opposite to the bearing seat, the top of the deformation variable marking component and the light board are in the same plane as the bottom of the support arm component 1, and a parallel light beam is emitted to the deformation variable marking component through the light board, so as to project the deformed part of the bottom of the printing screen onto the deformation variable marking component to calculate the maximum deformation of the printing screen, and an industrial camera and a wireless transmission module are also fixedly arranged on the side wall of the bearing seat close to the light board; The deformation variable marking component comprises a projection plate which is detachably arranged on the inner wall of the bearing seat by means of bolts, and a plurality of scale line grooves 2 are evenly opened on the side wall of the projection plate relative to the light board.

[0012] Furthermore, the structures of support arm assembly 1 and support arm assembly 2 are the same, and support arm assembly 1 includes a support arm that is simultaneously slidably arranged inside two slide grooves, a limiting sleeve is fixedly arranged on the side wall of the support arm relative to support arm assembly 2, and the top of the limiting sleeve is threadedly connected with a plurality of fastening bolts 1 for locking different positions of the printing screen.

[0013] Furthermore, the scraping simulation mechanism includes two side panels fixedly arranged on both sides of the interior of the test cabinet, wherein a cylinder is fixedly arranged on the side wall of one of the side panels, the output shaft of the cylinder slides through the side panel and a push-pull rod is fixedly arranged thereon, the push-pull rod slides through the side panel and extends to the outside, and a guide rod is also fixedly arranged on the opposite side walls of the two side panels, and scraper units are sleeved on the outer walls of the push-pull rod and the guide rod and at positions corresponding to the No. 1 printing screen positioning mechanism, the No. 2 printing screen positioning mechanism, and the No. 3 printing screen positioning mechanism.

[0014] Furthermore, the scraper unit includes a scraper mounting sleeve and a mounting plate fixedly arranged on the top of the scraper mounting sleeve, a scraper for scraping the top of the printing screen is slidably arranged inside the scraper mounting sleeve, a fastening bolt 2 is threadedly connected to the side wall of the scraper, and a lifting groove is also provided on the side wall of the scraper mounting sleeve, and a scale line groove 3 for marking the position of the fastening bolt 2 is provided on the outer wall of the scraper mounting sleeve and located on one side of the lifting groove, and the fastening bolt 2 slides through the lifting groove and extends to the outside.

[0015] Furthermore, the printing screen comprises a plate frame, a screen is fixedly arranged on the inner wall of the plate frame, and a printing pattern area for forming a preset pattern is also arranged on the top middle area of ​​the screen.

[0016] The present invention also discloses a testing method of an automated life testing device based on a printing screen, the method comprising the following steps: Step 1: First, multiple printing screens to be tested are placed in the No. 1 printing screen positioning mechanism, the No. 2 printing screen positioning mechanism and the No. 3 printing screen positioning mechanism in sequence, and the printing screens are stably clamped, and then a certain amount of ink is applied on the top of the printing screen to be tested; Step 2: Then, the controller starts the scraping simulation mechanism to scrape the top of the printing screen according to the preset scraping frequency; Step 3: After the test, observe the deformation and surface wear of the printing screens in the No. 1 printing screen positioning mechanism, the No. 2 printing screen positioning mechanism and the No. 3 printing screen positioning mechanism. The wear state of the top of the printing screen is recorded by camera, and the test time and deformation value are recorded and analyzed at the same time.

[0017] The present invention provides an automated life test device and test method based on a printed screen. Compared with the prior art, it has the following beneficial effects: 1. An automated life test device and test method based on printing screens. Through a No. 1 printing screen positioning mechanism, a No. 2 printing screen positioning mechanism and a No. 3 printing screen positioning mechanism, multiple printing screens in the same batch can be clamped and fixed for testing at the same time. By performing comprehensive life tests on multiple printing screens, multiple test printing screens can be compared with each other, so that more accurate test results can be obtained, avoiding the influence of accidental errors caused by operational errors on the test results, and improving the credibility of the test results; and multiple printing screen positioning mechanisms can be adaptively adjusted according to printing screens of different sizes, and can realize the clamping and fixing of printing screens of various sizes, thereby improving practicality.

[0018] 2. An automated life test device and test method based on a printing screen. By setting a projection component in a printing screen positioning mechanism, the outline of the printing screen that has been deformed after a life test can be projected onto a projection board using a light board. The maximum deformation of the printing screen relative to the initial state can be calculated by observing the position of the projection outline relative to the second scale groove, thereby calculating the deformation of the printing screen after a certain number of printing tests. Based on this, the time point until the printing screen becomes unusable can be deduced, providing a basis for the subsequent estimation of the service life of other printing screens of the same batch and model, thereby avoiding the situation where the deformation of the printing screen cannot be measured using conventional measuring tools.

[0019] 3. An automated life test device and test method based on a printing screen. By setting a scraping simulation mechanism, a cylinder can be used to simultaneously push scraper units at multiple positions to scrape the printing screen at relative positions. The scraper in the scraper unit can be raised and lowered relative to the scraper mounting sleeve, thereby changing the distance between the scraper and the surface of the printing screen, so that the scraper can form scraping pressures of different sizes on the printing screen. By adjusting the position of the scraper with reference to the scale groove, the position adjustment of the scraper at multiple positions can be more uniform and accurate, so that the scrapers at multiple positions can apply uniform or gradient-increasing scraping pressures to the printing screen at relative positions, simulating the service life of the printing screen under the action of scraping forces of different sizes.

[0020] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the first overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of part A; Figure 4 This is a schematic diagram of the structure of the present invention without the test cabinet and the cabinet door; Figure 5 This is a structural schematic diagram of a No. 1 printing screen positioning mechanism of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of part B in FIG. Figure 7This is a schematic diagram of the structure of the No. 1 printing screen positioning mechanism in the decomposed state of the present invention; Figure 8 This is a schematic structural diagram of the first state of the printing material simulation component of the present invention with the support seat pulled out; Fig. 9 For the present invention Figure 8 A schematic diagram of the enlarged structure of part C in FIG. Fig.10 It is a schematic structural diagram of the second state of the printing material simulation component of the present invention with the support seat pulled out; Fig.11 This is a schematic diagram of the bottom structure of the No. 1 printing screen positioning mechanism of the present invention; Fig.12 This is a schematic diagram of the front view structure of the bearing seat of the present invention; Fig.13 It is a structural schematic diagram of a support arm assembly of the present invention; Fig.14 It is a schematic diagram of the structure of the scraping simulation mechanism of the present invention; Fig.15 It is a schematic diagram of the overall state structure of the scraper unit of the present invention; Fig.16 This is a schematic diagram of the structure of the scraper unit of the present invention in a disassembled state; Fig.17 It is a schematic diagram of the printing screen structure of the present invention.

[0022] In the figure: 1, test cabinet; 2, cabinet door; 3, No. 1 printing screen positioning mechanism; 31, bearing seat; 32, horizontal support plate; 33, slide groove; 34, support arm assembly 1; 341, support arm; 342, limit sleeve; 343, fastening bolt 1; 35, support arm assembly 2; 36, scale groove 1; 37, slide rail; 38, substrate simulation assembly; 381, support plate; 382, ​​slide sleeve; 383, printing plate; 384, handle; 39, deformation variable marking assembly; 391, projection plate; 392, scale groove 2 ; 310, light board; 311, industrial camera; 312, wireless transmission module; 4, No. 2 printing screen positioning mechanism; 5, No. 3 printing screen positioning mechanism; 6, scraping simulation mechanism; 61, side plate; 62, cylinder; 63, push-pull rod; 64, guide rod; 65, scraper unit; 651, scraper mounting sleeve; 652, mounting plate; 653, scraper; 654, lifting slot; 655, fastening bolt two; 656, scale line slot three; 7, printing screen; 71, plate frame; 72, screen; 73, printing pattern area. DETAILED DESCRIPTION

[0023] 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.

[0024] The present invention provides three technical solutions: an automated life test device based on a printed screen, specifically including the following embodiments: like Figure 1-Figure 4 , 17 shows a first embodiment: an automated life test device based on a printed screen, comprising a test cabinet 1 and a cabinet door 2 rotatably arranged on the front of the test cabinet 1 by a hinge, wherein a printed screen 7 to be tested is arranged inside the test cabinet 1, and further comprising: The first printing screen positioning mechanism 3, the second printing screen positioning mechanism 4 and the third printing screen positioning mechanism 5 are arranged in the test cabinet 1 at equal intervals, and are used to stably clamp the printing screen 7 to be tested, and measure the deformation of the printing screen 7 during the test process by projection after the test is completed; The scraping simulation mechanism 6 is arranged above the No. 1 printing screen positioning mechanism 3, the No. 2 printing screen positioning mechanism 4 and the No. 3 printing screen positioning mechanism 5, and is used to simulate the continuous scraping action on the top of the printing screen 7 during the printing process, so as to apply a preset friction force to the local area of ​​the top of the printing screen 7; The controller is fixedly mounted on the side wall of the test cabinet 1 and is used to control the scraping frequency of the scraping simulation mechanism 6 on the local area on the top of the printing screen 7 and the operation of other electrical equipment, the other electrical equipment specifically referring to the light board 310, the industrial camera 311, the wireless transmission module 312, and the cylinder 62.

[0025] The printing screen 7 comprises a plate frame 71 , on the inner wall of which a screen 72 is fixedly arranged, and a printing pattern area 73 for forming a preset pattern is also arranged on the top middle area of ​​the screen 72 .

[0026] like Figure 5-Figure 13A second embodiment is shown, which differs from the first embodiment in that: an automated life test device based on a printing screen, a No. 1 printing screen positioning mechanism 3 includes a bearing seat 31 detachably arranged inside the test cabinet 1 by bolts, and a clamping component for fixing the printing screen 7 is arranged on the side wall of the bearing seat 31 away from the cabinet door 2, and slide rails 37 are fixedly arranged on the relative inner walls of the bearing seat 31, and a printing material simulation component 38 for simulating a printing material is slidably arranged inside the two slide rails 37, and a projection component for displaying the deformation amount of the printing screen 7 after the life test is completed is also arranged on the inner wall of the bearing seat 31 and above the printing material simulation component 38. The clamping component includes a transverse support plate 32 fixedly arranged on the side wall of the bearing seat 31, and the upper and lower sides of the front side of the transverse support plate 32 are provided with sliding grooves 33, and the inner sides of the two sliding grooves 33 are respectively slidably provided with support arm components 1 34 and support arm components 2 35 that cooperate with each other. The support arm components 1 34, support arm components 2 35 and the transverse support plate 32 are locked in position by bolts, and a scale line groove 1 36 for displaying the positions of support arm components 1 34 and support arm components 2 35 is also provided on the front side of the transverse support plate 32 to ensure that the clamping area between support arm components 1 34 and support arm components 2 35 is always located at the top middle position of the substrate simulation component 38. The substrate simulation assembly 38 includes a support plate 381 and a sliding sleeve 382 fixedly arranged on both sides of the outer wall of the support plate 381. The two sliding sleeves 382 are respectively slidably sleeved on the outer wall of the slide rail 37 at the corresponding position. A printing plate 383 is fixedly arranged on the top of the support plate 381, and a handle 384 for convenient pushing and pulling is also fixedly arranged on the side wall of the printing plate 383 away from the horizontal support plate 32. After the printing plate 383 is pushed into the interior of the bearing seat 31, and the printing screen 7 is clamped between the support arm assembly 1 34 and the support arm assembly 2 35, there is a gap between the top of the printing plate 383 and the bottom of the printing screen 7.The projection component includes a deformation variable marking component 39 and a light board 310 which are detachably arranged on the inner wall opposite to the bearing seat 31. The top of the deformation variable marking component 39 and the light board 310 are in the same plane as the bottom of the support arm component 34. The light board 310 emits a parallel light beam to the deformation variable marking component 39, which is used to project the deformed part of the bottom of the printing screen 7 onto the deformation variable marking component 39 to calculate the maximum deformation of the printing screen 7. An industrial camera 3 is also fixedly arranged on the side wall of the bearing seat 31 near the light board 310. 11 and wireless transmission module 312, industrial camera 311 and wireless transmission module 312 establish wireless communication connection, controller instructions are transmitted to industrial camera 311 through wireless transmission module 312, and image information acquired by industrial camera 311 is also sent to terminal device through wireless transmission module 312; deformation variable marking component 39 includes projection plate 391 detachably arranged on the inner wall of bearing seat 31 through bolts, and multiple scale line grooves 392 are evenly opened on the side wall of projection plate 391 relative to light board 310. Support arm component 1 34 and support arm component 2 35 have the same structure, support arm component 1 34 includes support arm 341 slidably arranged inside two slide grooves 33 at the same time, and a limit sleeve 342 is fixedly arranged on the side wall of support arm component 2 35 relative to support arm component 341, and multiple fastening bolts 343 for locking different positions of printing screen 7 are connected to the top of the limit sleeve 342 through threads.

[0027] like Figure 14-16A third embodiment is shown, which differs from the second embodiment in that: an automated life test device based on a printed screen, a scraping simulation mechanism 6 includes two side plates 61 fixedly arranged on both sides of the interior of a test cabinet 1, a cylinder 62 is fixedly arranged on the side wall of one of the side plates 61, the output shaft of the cylinder 62 slides through the side plate 61 and is fixedly provided with a push-pull rod 63, the push-pull rod 63 slides through the side plate 61 and extends to the outside, and a guide rod 64 is also fixedly arranged on the opposite side walls of the two side plates 61, and a scraper unit 65 is sleeved on the outer wall of the push-pull rod 63 and the guide rod 64 and at the position corresponding to the No. 1 printed screen positioning mechanism 3, the No. 2 printed screen positioning mechanism 4, and the No. 3 printed screen positioning mechanism 5. The scraper unit 65 and the push-pull rod 63 are fixedly connected, and the scraper unit 65 and the guide rod 64 are slidably connected. Multiple scraper units 65 are respectively arranged directly above the printing material simulation component 38 at corresponding positions; the scraper unit 65 includes a scraper mounting sleeve 651 and a mounting plate 652 fixedly arranged on the top of the scraper mounting sleeve 651, and a scraper 653 for scraping the top of the printing screen 7 is slidably arranged inside the scraper mounting sleeve 651. A fastening bolt No. 2 655 is threadedly connected to the side wall of the scraper 653, and a lifting groove 654 is also provided on the side wall of the scraper mounting sleeve 651. A scale line groove No. 3 656 for marking the position of the fastening bolt No. 2 655 is provided on the outer wall of the scraper mounting sleeve 651 and located on one side of the lifting groove 654. The fastening bolt No. 2 655 slides through the lifting groove 654 and extends to the outside.

[0028] The embodiment of the present invention further provides a testing method of an automated life testing device based on a printed screen, the method comprising the following steps: Step 1: First, multiple printing screens 7 to be tested are placed in the No. 1 printing screen positioning mechanism 3, the No. 2 printing screen positioning mechanism 4 and the No. 3 printing screen positioning mechanism 5 in sequence, and the printing screens 7 are stably clamped, and then a certain amount of ink is applied to the top of the printing screen 7 to be tested; according to the size of the printing screen 7 to be tested, the clamping distances of the support arm assembly 1 34 and the support arm assembly 2 35 in the No. 1 printing screen positioning mechanism 3, the No. 2 printing screen positioning mechanism 4 and the No. 3 printing screen positioning mechanism 5 are adjusted respectively to ensure that the printing screen 7 can be just placed in the support arm assembly 1 34 and the support arm assembly 2 35 at the relative position; When adjusting the positions of the support arm assembly 1 34 and the support arm assembly 2 35, first loosen the fastening bolts between the locking support arm 341 and the transverse support plate 32, and then move the support arm assembly 1 34 and the support arm assembly 2 35 toward or away from each other with reference to the scale groove 1 36 until the spacing between the support arm assembly 1 34 and the support arm assembly 2 35 matches the width of the printing screen 7 to be tested, and then push the printing screen 7 along the inner wall of the limiting sleeve 342 in the support arm assembly 1 34 and the support arm assembly 2 35, and place the area where the printing pattern area 73 is located corresponding to the top center area of ​​the substrate simulation assembly 38. After the printing screen 7 is placed, use the fastening bolts to lock the support arm assembly 1 34 and the support arm assembly 2 35 on the transverse support plate 32, and then use the fastening bolt 1 343 to lock the printing screen 7 inside the limiting sleeve 342; When adjusting the distance between the bottom end of the scraper 653 and the top of the printing screen 7, loosen the second fastening bolt 655 to release the lock between the scraper 653 and the scraper mounting sleeve 651, and then pull the scraper 653 downward or upward until the bottom of the scraper 653 and the top of the screen 72 are in contact, and the bottom end of the scraper 653 forms a certain size of pre-squeezing pressure on the top of the screen 72, and then use the second fastening bolt 655 to lock the position of the scraper 653 again, and refer to the corresponding position of the second fastening bolt 655 on the scale groove 3 656 to adjust the scraper 653 at the corresponding position of the second printing screen positioning mechanism 4 and the third printing screen positioning mechanism 5. It should be noted that by controlling the height of the scraper 653, the scraping pressure of the scraper 653 relative to the screen 72 can be controlled; after the bottom of the scraper 653 contacts the top of the screen 72, the pressure of the scraper 653 relative to the screen 72 increases by a fixed preset value every time the scraper 653 moves downward by a scale distance; Step 2: Then, the scraping simulation mechanism 6 is started by the controller to scrape the top of the printing screen 7 at a preset scraping frequency; the controller controls the cylinder 62 to push the push-pull rod 63 to move back and forth at a preset frequency, and the mounting plates 652 at multiple positions slide along the outer wall of the guide rod 64, and the scraper 653 slides back and forth along the surface of the screen 72; Step 3: After the test, the deformation and surface wear of the printing screen 7 in the No. 1 printing screen positioning mechanism 3, the No. 2 printing screen positioning mechanism 4 and the No. 3 printing screen positioning mechanism 5 are observed, and the wear state of the top of the printing screen 7 is recorded by a camera, and the test time and deformation value are recorded and analyzed at the same time; when the test time is reached, the cylinder 62 stops running, and the handles 384 in the No. 1 printing screen positioning mechanism 3, the No. 2 printing screen positioning mechanism 4 and the No. 3 printing screen positioning mechanism 5 are manually pulled in a direction away from the transverse support plate 32, and the sliding sleeve 382 slides along the sliding rail 37 toward the outside of the bearing seat 31 until the support plate 381 is separated from the inner cavity of the bearing seat 31. At this time, the controller controls the light board 310 to emit a parallel light beam in the direction of the deformation variable marking component 39. Since the initial state of the bottom of the screen 72 is flush with the deformation variable marking component 39 and the top of the light board 310, that is, when the screen 72 is in a taut state, the parallel light beam emitted by the light board 310 has no projection contour on the deformation variable marking component 39; During the test, the top of the screen 72 is continuously scraped by the scraper unit 65, and its tension is continuously relaxed, so that the bottom of the screen 72 is bent and deformed. The bent and deformed area at the bottom of the screen 72 protrudes from the bottom of the limit sleeve 342. Therefore, under the illumination of the parallel light beam of the light board 310, the bent and deformed area at the bottom of the screen 72 forms a projection contour of a corresponding shape on the deformation variable marking component 39. The image of the projection contour is captured by the industrial camera 311 and transmitted to the terminal device through the wireless transmission module 312. The terminal device is used to analyze and view the image. In the comparative analysis, by referring to the scale groove 392 to observe the position of the projection contour line on the side wall of the projection board 391, the deformation of the screen 72 during the test can be immediately obtained. Secondly, by taking photos, image samples of the surface of the screen 72 in the No. 1 printing screen positioning mechanism 3, the No. 2 printing screen positioning mechanism 4 and the No. 3 printing screen positioning mechanism 5 are obtained, and then the image of the surface of the screen 72 before the test is compared with the image sample after the test, so as to obtain the degree of wear of the surface of the screen 72 within the preset test time, and then the average service life of the printing screen 7 is estimated in combination with the test time.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automated life test device based on a printed screen, comprising a test cabinet and a cabinet door rotatably arranged on the front of the test cabinet by a hinge, wherein a printed screen to be tested is arranged inside the test cabinet, characterized in that: Also includes: The first printing screen positioning mechanism, the second printing screen positioning mechanism and the third printing screen positioning mechanism are arranged in the test cabinet at equal intervals in sequence, and are used to stably clamp the printing screen to be tested, and after the test is completed, the deformation amount of the printing screen during the test is measured by projection; The scraping simulation mechanism is arranged above the No. 1 printing screen positioning mechanism, the No. 2 printing screen positioning mechanism and the No. 3 printing screen positioning mechanism, and is used to simulate the continuous scraping action on the top of the printing screen during the printing process, so as to apply a preset friction force to the local area of ​​the top of the printing screen; A controller, fixedly mounted on a side wall of the test cabinet, for controlling the scraping frequency of the scraping simulation mechanism on a local area on the top of the printing screen; The No. 1 printing screen positioning mechanism comprises a bearing seat detachably arranged inside the test cabinet by bolts, and a projection component for displaying the deformation amount of the printing screen after the life test is completed is also arranged on the inner wall of the bearing seat and above the substrate simulation component; The projection component includes a deformation variable marking component and a light board that are detachably arranged on the inner wall relative to the supporting seat. The top of the deformation variable marking component and the light board are in the same plane as the bottom of the support arm component. A parallel light beam is emitted to the deformation variable marking component through the light board, which is used to project the deformed part of the bottom of the printing screen onto the deformation variable marking component to calculate the maximum deformation of the printing screen. An industrial camera and a wireless transmission module are also fixedly arranged on the side wall of the supporting seat close to the light board.

2. The automatic life test device based on printing screen according to claim 1, characterized in that: A clamping component for fixing the printing screen is arranged on the side wall of the bearing seat away from the cabinet door, and slide rails are fixedly arranged on the opposite inner walls of the bearing seat, and a printing material simulation component for simulating the printing material is slidably arranged inside the two slide rails.

3. The automatic life test device based on printing screen according to claim 2, characterized in that: The clamping component includes a transverse support plate fixedly arranged on the side wall of the bearing seat, and sliding grooves are provided on the upper and lower sides of the front side of the transverse support plate, and support arm assembly 1 and support arm assembly 2 that cooperate with each other are slidably arranged on both sides of the inner sides of the two sliding grooves. The support arm assembly 1, support arm assembly 2 and the transverse support plate are locked in position by bolts, and a scale line groove 1 for displaying the position of support arm assembly 1 and support arm assembly 2 is also provided on the front side of the transverse support plate to ensure that the clamping area between support arm assembly 1 and support arm assembly 2 is always located at the top middle position of the substrate simulation component.

4. The automatic life test device based on printing screen according to claim 2, characterized in that: The printing material simulation component includes a support plate and sliding sleeves fixedly arranged on both sides of the outer wall of the support plate, and the two sliding sleeves are respectively slidably mounted on the outer walls of the slide rails at corresponding positions. A printing plate is fixedly arranged on the top of the support plate, and a handle for convenient pushing and pulling is also fixedly arranged on the side wall of the printing plate away from the horizontal support plate.

5. The automatic life test device based on printing screen according to claim 1, characterized in that: The deformation variable marking component comprises a projection plate which is detachably arranged on the inner wall of the bearing seat by means of bolts, and a plurality of scale line grooves 2 are evenly opened on the side wall of the projection plate relative to the light board.

6. The automatic life test device based on printing screen according to claim 3, characterized in that: The support arm assembly 1 and the support arm assembly 2 have the same structure. The support arm assembly 1 includes a support arm that is slidably arranged inside two slide grooves at the same time. A limiting sleeve is fixedly arranged on the side wall of the support arm relative to the support arm assembly 2, and the top of the limiting sleeve is threadedly connected with a plurality of fastening bolts 1 for locking different positions of the printing screen.

7. The automatic life test device based on printing screen according to claim 1, characterized in that: The scraping simulation mechanism includes two side panels fixedly arranged on both sides of the interior of the test cabinet, wherein a cylinder is fixedly arranged on the side wall of one of the side panels, the output shaft of the cylinder slides through the side panel and is fixedly arranged with a push-pull rod, the push-pull rod slides through the side panel and extends to the outside, and a guide rod is also fixedly arranged on the opposite side walls of the two side panels, and scraper units are sleeved on the outer walls of the push-pull rod and the guide rod and at positions corresponding to the No. 1 printing screen positioning mechanism, the No. 2 printing screen positioning mechanism, and the No. 3 printing screen positioning mechanism.

8. The automatic life test device based on printing screen according to claim 7, characterized in that: The scraper unit includes a scraper mounting sleeve and a mounting plate fixedly arranged on the top of the scraper mounting sleeve, a scraper for scraping the top of the printing screen is slidably arranged inside the scraper mounting sleeve, a fastening bolt 2 is threadedly connected to the side wall of the scraper, and a lifting groove is also provided on the side wall of the scraper mounting sleeve, and a scale line groove 3 for marking the position of the fastening bolt 2 is provided on the outer wall of the scraper mounting sleeve and located on one side of the lifting groove, and the fastening bolt 2 slides through the lifting groove and extends to the outside.

9. The automatic life test device based on printing screen according to claim 1, characterized in that: The printing screen comprises a plate frame, a screen is fixedly arranged on the inner wall of the plate frame, and a printing pattern area for forming a preset pattern is also arranged on the top middle area of ​​the screen.

10. A testing method for implementing the automatic life testing device based on a printing screen according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Step 1: First, multiple printing screens to be tested are placed in the No. 1 printing screen positioning mechanism, the No. 2 printing screen positioning mechanism and the No. 3 printing screen positioning mechanism in sequence, and the printing screens are stably clamped, and then a certain amount of ink is applied on the top of the printing screen to be tested; Step 2: Then, the controller starts the scraping simulation mechanism to scrape the top of the printing screen according to the preset scraping frequency; Step 3: After the test, observe the deformation and surface wear of the printing screens in the No. 1 printing screen positioning mechanism, the No. 2 printing screen positioning mechanism and the No. 3 printing screen positioning mechanism. The wear state of the top of the printing screen is recorded by camera, and the test time and deformation value are recorded and analyzed at the same time.

Images