A net stretcher

Abstract

The present application provides a kind of net stretcher, including workbench bottom plate and fuselage bottom plate, the upper surface of the workbench bottom plate is provided with marble guide rail base and cylinder electric cylinder linkage stretching valve, the cylinder electric cylinder linkage stretching valve is arranged between two marble guide rail bases, marble guide rail crossbeam is connected on the marble guide rail base, and head base is connected on the front side of marble guide rail crossbeam, and the lower side of head base is connected with measuring device, visual device and laser gun head, the upper side of the fuselage bottom plate is provided with motion frame assembly, and support platform is provided at the top of motion frame assembly, floating ball device for leveling support platform is arranged between motion frame assembly and support platform.The present application utilizes visual feedback control and laser welding technology, stretches diaphragm to target position, carries out net stretching, positioning and welds diaphragm on frame, and fixes it, to prevent sagging during organic material deposition.

Description

Technical Field

[0001] This invention relates to the field of net-stretching machine technology, and more particularly to a net-stretching machine. Background Technology

[0002] The manufacturing process of OLEDs is mainly divided into the front-end TFT (thin-film transistor) array process, the middle-end cell assembly process, and the back-end module assembly process.

[0003] The front-end TFT array process involves film deposition, exposure, and etching to stack different patterned and material film layers to form LTPS (low-temperature polycrystalline silicon) driving circuits, which provide lighting signals and stable power inputs for light-emitting devices.

[0004] The mid-stage cell assembly process uses a high-precision metal mask (FMM) to deposit organic light-emitting materials and cathode materials onto a backplane, which is then combined with the driving circuitry to form a light-emitting device. This device is then encapsulated in an oxygen-free environment for protection. The alignment accuracy of the deposition process and the hermeticity of the encapsulation are the main challenges of the front-panel assembly process.

[0005] The back-end module assembly process cuts the packaged panel into the actual product size, and then performs various processes such as polarizer attachment, control circuit and chip bonding, aging test and product packaging to form the terminal display product.

[0006] In the display panel industry, the sheet-stretching machine is a core precision piece of equipment required in the "precision metal mask (FMM)" process of OLED (Organic Light Emitting Diode) display manufacturing process, specifically in the cell assembly stage. It is primarily used to fabricate general metal masks (CMM) or precision metal masks (FMM), mainly performing sheet stretching, positioning, and welding of the film (sheet) to the frame (frame), and fixing it to prevent sagging during organic material deposition. The OLED mask stretching machine, along with the evaporation equipment, is classified as core equipment because it directly affects the alignment accuracy of the evaporation process and is crucial for defining pixel precision. Summary of the Invention

[0007] The present invention aims to provide a screen-stretching machine that overcomes or at least partially solves the above-mentioned problems, in order to solve the problem of preventing the membrane from sagging during the deposition of organic materials.

[0008] To achieve the above objectives, the technical solution of the present invention is specifically implemented as follows:

[0009] This invention provides a screen-stretching machine, including a workbench base plate and a machine body base plate. The machine body base plate is located below the workbench base plate, and a workbench support is provided between the machine body base plate and the workbench base plate. A marble guide rail base and a cylinder-electric cylinder linkage tension valve are provided on the upper surface of the workbench base plate. The cylinder-electric cylinder linkage tension valve is located between two marble guide rail bases. A marble guide rail beam is connected to the marble guide rail base, and a machine head base is connected to the front side of the marble guide rail beam. A measuring device, a vision device, and a laser gun head are connected to the lower side of the machine head base. A motion frame assembly is provided on the upper surface of the machine body base plate, and a support platform is provided at the top of the motion frame assembly. A float device for leveling the support platform is provided between the motion frame assembly and the support platform, and an ejection valve for limiting the support platform is fixed on the outside of the motion frame assembly. An linkage valve ejection device for raising and lowering the motion frame assembly is provided inside the motion frame assembly, and a backlight device for backlighting the product frame is also provided inside the motion frame assembly.

[0010] As a further embodiment of the present invention, the motion frame assembly includes a motion base plate, a first motion plate, a second motion plate group, and a motion frame, wherein the motion base plate, the first motion plate, the second motion plate group, and the motion frame are arranged sequentially from bottom to top. A guide groove is fixedly connected to the bottom surface of the motion base plate, and the guide groove is sleeved on the motion frame guide rail, and the motion frame guide rail is fixedly connected to the upper surface of the machine body base plate. The linkage valve ejection device includes a lower linkage valve ejection device and an upper linkage valve ejection device. The lower linkage valve ejection device is fixedly connected between the motion base plate and the first motion plate, and moves along the motion frame guide rail through the guide groove, which facilitates the guidance of the movement of the motion frame assembly.

[0011] As a further embodiment of the present invention, the second moving plate group includes an upper connecting plate and a lower connecting plate. The lower connecting plate is fixedly disposed at the bottom of the first moving plate, and the first moving plate has a U-shaped cross-section. The upper connecting plate is fixedly connected to the lower side of the moving frame. The upper linkage valve ejection device is fixed between the upper connecting plate and the lower connecting plate. The upper linkage valve ejection device and the lower linkage valve ejection device facilitate the secondary lifting of the support platform, thereby improving the transportation stability of the product frame.

[0012] As a further embodiment of the present invention, the motion frame has three sets of through slots inside, and each of the three sets of through slots is equipped with a backlight device. Multiple float devices and a support platform are fixedly connected around the top surface of the motion frame, and the upper side of the float device contacts the support platform and adjusts the support platform to ensure the levelness of the support platform, thereby ensuring the levelness of the product frame.

[0013] As a further embodiment of the present invention, multiple ejector valves are fixedly connected to the upper connecting plate on its side surface, and the multiple ejector valves are all arranged around the moving frame. Each ejector valve includes an ejector pin sleeve, an ejector head, and an ejector pin rod. The ejector pin rod is inserted into the ejector pin sleeve and moves up and down along the ejector pin sleeve. An ejector head is integrally connected to the top of the ejector pin rod. The end of the ejector head presses against the support platform, and the ejector head and the ejector pin rod form an L-shaped structure. Multiple positioning posts are fixedly connected to the lower side surface of the support platform, and the positioning posts are arranged around the moving frame and contact the circumferential surface of the moving frame. The ejector head facilitates the clamping of the support platform, and the ejector pin rod guides the movement along the ejector pin sleeve, which further improves the levelness of the support platform during movement.

[0014] As a further embodiment of the present invention, a suspended frame guide rail is fixedly connected to the middle of the base plate of the machine body, and the suspended frame guide rail is disposed between two motion frame guide rails. A motion device servo motor is fixedly connected to the front side of the suspended frame guide rail. The output shaft of the motion device servo motor is connected to a ball screw, and the ball screw is disposed on the suspended frame guide rail. The motion device servo motor drives the motion frame assembly to move through the ball screw. The operation of the motion device servo motor facilitates the rotation of the ball screw, thereby driving the upper part of the motion frame assembly to move along the suspended frame guide rail.

[0015] As a further embodiment of the present invention, a lower support floor is fixedly connected between the base plate of the machine body and the workbench support, and an upper support floor is fixedly connected between the workbench support and the base plate of the workbench. An anti-slip steel plate is fixedly connected to the upper surface of the base plate of the machine body, and multiple anti-slip protrusions are integrally connected to the upper surface of the anti-slip steel plate. The anti-slip steel plate is set on the outside of the guide rail of the motion frame. Multiple lifting screws for hoisting are connected around the base plate of the machine body and the base plate of the workbench. Four or more sets of shock-absorbing frames are fixedly connected to the lower side of the base plate of the machine body, which realizes the function of shock absorption, improves the anti-slip performance, and facilitates the hoisting of the base plate of the machine body and the base plate of the workbench.

[0016] As a further embodiment of the present invention, the marble guide rail base is slidably connected to the marble guide rail beam via a linear guide rail, and the marble guide rail beam is slidably connected to the machine head base via a linear guide rail. A machine head cover is fitted onto the front side of the machine head base, which facilitates the movement of the measuring device, vision device, and laser gun head on the machine head base, and facilitates precise control of the movement position.

[0017] As a further embodiment of the present invention, the cylinder-electric cylinder linkage tension valve is provided in sixty-six sets, and the sixty-six sets of cylinder-electric cylinder linkage tension valves are respectively arranged around the opening. The opening is opened at the upper part of the workbench base plate, which realizes the full opening of the diaphragm and the high uniformity of force.

[0018] This invention provides a wire mesh stretching machine with the following advantages: It is the first time a 66-set electric cylinder linkage pneumatic cylinder has been used for wire mesh stretching; stress-relieving grippers are employed to prevent wrinkles during tensioning; and the machine exhibits high uniformity of force distribution and flatness. Furthermore, each action performed by the machine is controlled by software, resulting in a high degree of automation and ensuring a high product yield. The machine's guide rail accuracy can reach up to 0.003mm. It utilizes multiple technologies including sensing, vision, suspension, measurement, and welding. Visual feedback control and laser welding technology are used to stretch the membrane to the target position, perform wire mesh stretching, positioning, and welding of the membrane to the frame, thus preventing sagging during organic material deposition. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of an embodiment of the present invention viewed from the front.

[0021] Figure 2 This is a front view of an embodiment of the present invention.

[0022] Figure 3 This is a rear view of an embodiment of the present invention.

[0023] Figure 4 This is a structural schematic diagram of the rear view of an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the structure of the machine head base according to an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the motion frame assembly according to an embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of the exploded structure of the ejector valve according to an embodiment of the present invention.

[0027] In the diagram: 1. Workbench base plate; 2. Machine body base plate; 3. Workbench support; 4. Marble guide rail beam; 5. Machine head cover; 6. Machine head base; 7. Pneumatic / electric cylinder linkage tension valve; 8. Float device; 9. Motion frame assembly; 10. Backlight device; 11. Motion device servo motor; 12. Ejector valve; 13. Positioning column; 14. Anti-slip steel plate; 15. Anti-vibration frame; 16. Lifting screw; 17. Tank chain; 18. Lower support floor; 19. Suspended frame guide rail; 2 0. Motion frame guide rail; 21. Upper support floor; 22. Marble guide rail base; 23. Lower linkage valve ejection device; 24. Upper linkage valve ejection device; 25. Measuring device; 26. Vision device; 27. Laser gun head; 28. Support platform; 29. ​​Product frame; 91. Motion base plate; 92. First motion plate; 93. Second motion plate assembly; 94. Motion frame; 111. Ball screw; 121. Ejection pin sleeve; 122. Ejection head; 123. Ejection pin rod. Detailed Implementation

[0028] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0029] See Figure 1-5 This invention provides a wire mesh stretching machine, comprising a workbench base plate 1 and a machine body base plate 2. The machine body base plate 2 is located below the workbench base plate 1, and a workbench support 3 is provided between the machine body base plate 2 and the workbench base plate 1. A marble guide rail base 22 and a cylinder-electric linkage tension valve 7 are provided on the upper surface of the workbench base plate 1. The cylinder-electric linkage tension valve 7 is located between two marble guide rail bases 22. A marble guide rail crossbeam 4 is connected to the marble guide rail base 22, and a machine head base 6 is connected to the front side of the marble guide rail crossbeam 4. The device is connected to a measuring device 25, a vision device 26, and a laser gun head 27. A motion frame assembly 9 is provided on the upper side of the base plate 2 of the machine body, and a support platform 28 is provided at the top of the motion frame assembly 9. A float device 8 for leveling the support platform 28 is provided between the motion frame assembly 9 and the support platform 28. An ejection valve 12 for limiting the support platform 28 is fixed on the outside of the motion frame assembly 9. A linkage valve ejection device for raising and lowering the motion frame assembly 9 is provided inside the motion frame assembly 9, and a backlight device 10 for backlighting the product frame 29 is also provided inside the motion frame assembly 9.

[0030] The motion frame assembly 9 includes a motion base plate 91, a first motion plate 92, a second motion plate group 93, and a motion frame 94, which are arranged sequentially from bottom to top. The bottom surface of the motion base plate 91 is fixedly connected to a guide groove, which is sleeved on the motion frame guide rail 20. The motion frame guide rail 20 is fixedly connected to the upper surface of the machine body base plate 2. The linkage valve ejection device includes a lower linkage valve ejection device 23 and an upper linkage valve ejection device 24. The lower linkage valve ejection device 23 is fixedly connected between the motion base plate 91 and the first motion plate 92.

[0031] The second motion plate assembly 93 includes an upper connecting plate and a lower connecting plate. The lower connecting plate is fixedly disposed at the bottom of the first motion plate 92, and the first motion plate 92 has a U-shaped cross-section. The upper connecting plate is fixedly connected to the lower side of the motion frame 94, and the upper linkage valve ejection device 24 is fixed between the upper connecting plate and the lower connecting plate.

[0032] A suspended frame guide rail 19 is fixedly connected to the upper center of the base plate 2 of the machine body, and the suspended frame guide rail 19 is arranged between two motion frame guide rails 20. A motion device servo motor 11 is fixedly connected to the front side of the suspended frame guide rail 19. The output shaft of the motion device servo motor 11 is connected to a ball screw 111. The ball screw 111 is arranged on the suspended frame guide rail 19. The motion device servo motor 11 drives the motion frame assembly 9 to move through the ball screw 111.

[0033] The marble guide rail base 22 is slidably connected to the marble guide rail beam 4 via a linear guide rail, and the marble guide rail beam 4 is slidably connected to the machine head base 6 via a linear guide rail. The machine head base 6 is fitted with a machine head cover 5 on its front side.

[0034] The cylinder-electric linkage tension valve 7 is provided in sixty-six sets, and the sixty-six sets of cylinder-electric linkage tension valve 7 are respectively arranged around the opening, which is located on the upper part of the workbench base plate 1.

[0035] In use, the product frame 29 is placed flat on the support platform 28, and the support platform 28 is leveled using the float device 8 and the ejector valve 12, thereby leveling the product frame 29. Then, the motion device servo motor 11 drives the ball screw 111 to rotate, which in turn drives the motion frame assembly 9 to move along the suspended frame guide rail 19 and the motion frame guide rail 20, thus synchronously moving the support platform 28 and the product frame 29. The backlight device 10 facilitates backlighting of the product frame 29 and the diaphragm, and 66 sets of cylinders... The electric cylinder linkage tension valve 7 facilitates stable tensioning of the diaphragm and ensures its flatness. The measuring device 25 and vision device 26 facilitate the alignment of the product frame 29 with the diaphragm. The extension of the lower linkage valve ejection device 23 and the upper linkage valve ejection device 24 moves the support platform 28 and the product frame 29 upward, bringing the product frame 29 into contact with the diaphragm. The operation of the laser gun head 27 then welds the diaphragm to the product frame 29. The linear guide rail facilitates the movement of the laser gun head 27, thereby achieving uniform welding with high welding precision.

[0036] The finished mask mesh has a precision of less than ±40μm after tensioning; stress-relieving grippers are used to prevent wrinkles from forming during tensioning; stretching is based on the target on the cell edge; the mask has accurate holes and is inserted into the pins of the mounting plate.

[0037] like Figure 6 and Figure 7 As shown, the motion frame 94 has three sets of through slots inside, and each of the three sets of through slots is equipped with a backlight device 10. Multiple float devices 8 and a support platform 28 are fixedly connected around the top surface of the motion frame 94, and the upper side of the float device 8 is in contact with the support platform 28 to level the support platform 28.

[0038] Multiple ejector valves 12 are fixedly connected to the upper connecting plate on the side surface, and the multiple ejector valves 12 are all arranged around the moving frame 94. Each ejector valve 12 includes an ejector pin sleeve 121, an ejector head 122, and an ejector pin rod 123. The ejector pin rod 123 is inserted into the ejector pin sleeve 121 and moves up and down along the ejector pin sleeve 121. The top end of the ejector pin rod 123 is integrally connected to the ejector head 122. The end of the ejector head 122 presses against the support platform 28, and the ejector head 122 and the ejector pin rod 123 form an L-shaped structure. Multiple positioning posts 13 are fixedly connected to the lower side surface of the support platform 28, and the positioning posts 13 are arranged around the moving frame 94 and contact the circumferential surface of the moving frame 94.

[0039] In use, the support platform 28 is placed on the motion frame and leveled by the float device 8. Then, the ejector pin 123 is inserted into the ejector pin sleeve 121 and moves along the ejector pin sleeve 121. The ejector pin 123 then moves downward, causing the ejector head 122 to move downward, thereby pressing the support platform 28 with the ejector head 122 and limiting the support platform 28, thus ensuring the horizontal stability of the support platform 28.

[0040] like Figure 4 As shown, a lower support floor 18 is fixedly connected between the machine base plate 2 and the workbench support 3, and an upper support floor 21 is fixedly connected between the workbench support 3 and the workbench base plate 1. An anti-slip steel plate 14 is fixedly connected to the upper surface of the machine base plate 2, and multiple anti-slip protrusions are integrally connected to the upper surface of the anti-slip steel plate 14. The anti-slip steel plate 14 is located on the outside of the motion frame guide rail 20. Multiple lifting screws 16 for hoisting are connected around the machine base plate 2 and the workbench base plate 1. Four or more sets of shock-absorbing frames 15 are fixedly connected to the lower side of the machine base plate 2.

[0041] During use, the lower support floor 18 and the upper support floor 21 improve the connection stability between the machine body base plate 2 and the workbench base plate 1, and also improve the shock absorption and vibration resistance of the entire machine body, thereby improving the stability of welding the diaphragm. At the same time, the anti-slip steel plate 14 improves the anti-slip performance, making it easier for personnel to stably transport the product frame 29. The lifting screws 16 enable the separate movement of the machine body base plate 2 and the workbench base plate 1, reducing the difficulty of movement. Moreover, the combination assembly also achieves the purpose of convenient assembly, disassembly and transportation.

[0042] This equipment is not only suitable for stretching electronic products and welding wire mesh, but also, once these mechanisms and advanced technologies are introduced, it can replace many domestic hydraulic and hydraulic wire mesh stretching machines in the future, and its application scope can cover every industry.

[0043] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A net-casting machine, characterized in that, The system includes a workbench base plate (1) and a machine body base plate (2). The machine body base plate (2) is located below the workbench base plate (1), and a workbench support (3) is provided between the machine body base plate (2) and the workbench base plate (1). A marble guide rail base (22) and a cylinder-electric cylinder linkage tension valve (7) are provided on the upper surface of the workbench base plate (1). The cylinder-electric cylinder linkage tension valve (7) is located between two marble guide rail bases (22). A marble guide rail beam (4) is connected to the marble guide rail base (22), and a machine head base (6) is connected to the front side of the marble guide rail beam (4). A measuring device is connected to the lower side of the machine head base (6). (25), vision device (26) and laser gun head (27), a motion frame assembly (9) is provided on the upper side of the base plate (2), and a support platform (28) is provided on the top of the motion frame assembly (9). A float device (8) for leveling the support platform (28) is provided between the motion frame assembly (9) and the support platform (28). An ejection valve (12) for limiting the support platform (28) is fixed on the outside of the motion frame assembly (9). A linkage valve ejection device for raising and lowering is provided inside the motion frame assembly (9), and a backlight device (10) for backlighting the product frame (29) is also provided inside it.

2. A net-casting machine according to claim 1, characterized in that, The motion frame assembly (9) includes a motion base plate (91), a first motion plate (92), a second motion plate group (93), and a motion frame (94). The motion base plate (91), the first motion plate (92), the second motion plate group (93), and the motion frame (94) are arranged sequentially from bottom to top. The bottom surface of the motion base plate (91) is fixedly connected with a guide groove, and the guide groove is sleeved on the motion frame guide rail (20). The motion frame guide rail (20) is fixedly connected to the upper surface of the body base plate (2). The linkage valve ejection device includes a lower linkage valve ejection device (23) and an upper linkage valve ejection device (24). The lower linkage valve ejection device (23) is fixedly connected between the motion base plate (91) and the first motion plate (92).

3. A net-casting machine according to claim 2, characterized in that, The second motion plate assembly (93) includes an upper connecting plate and a lower connecting plate. The lower connecting plate is fixedly installed at the bottom of the first motion plate (92), and the first motion plate (92) has a U-shaped cross section. The upper connecting plate is fixedly connected to the lower side of the motion frame (94), and the upper linkage valve ejection device (24) is fixed between the upper connecting plate and the lower connecting plate.

4. A net-casting machine according to claim 2, characterized in that, The motion frame (94) has three sets of through slots inside, and each of the three sets of through slots is equipped with a backlight device (10). Multiple float devices (8) and a support platform (28) are fixedly connected around the top surface of the motion frame (94). The upper side of the float device (8) is in contact with the support platform (28) and levels the support platform (28).

5. A net-casting machine according to claim 3, characterized in that, Multiple ejector valves (12) are fixedly connected to the upper connecting plate on the side side, and the multiple ejector valves (12) are all arranged around the motion frame (94). Each ejector valve (12) includes an ejector sleeve (121), an ejector head (122), and an ejector rod (123). The ejector rod (123) is inserted into the ejector sleeve (121), and the ejector rod (123) moves up and down along the ejector sleeve (121). The top of the ejector rod (123) is integrally connected to the ejector head (122). The end of the ejector head (122) presses against the support platform (28), and the ejector head (122) and the ejector rod (123) form an L-shaped structure. Multiple positioning columns (13) are fixedly connected to the lower side of the support platform (28), and the positioning columns (13) are arranged around the motion frame (94) and contact the circumferential surface of the motion frame (94).

6. A net-casting machine according to claim 1, characterized in that, A suspended frame guide rail (19) is fixedly connected to the upper middle part of the base plate (2) of the fuselage, and the suspended frame guide rail (19) is set between two motion frame guide rails (20). A motion device servo motor (11) is fixedly connected to the front side of the suspended frame guide rail (19). The output shaft of the motion device servo motor (11) is connected to a ball screw (111). The ball screw (111) is set on the suspended frame guide rail (19). The motion device servo motor (11) drives the motion frame assembly (9) to move through the ball screw (111).

7. A net-casting machine according to claim 1, characterized in that, The lower support floor (18) is fixedly connected between the base plate (2) and the workbench support (3), and the upper support floor (21) is fixedly connected between the workbench support (3) and the base plate (1). The upper surface of the base plate (2) is fixedly connected with an anti-slip steel plate (14), and the upper surface of the anti-slip steel plate (14) is integrally connected with multiple anti-slip protrusions. The anti-slip steel plate (14) is set on the outside of the motion frame guide rail (20). Multiple lifting screws (16) for hoisting are connected around the base plate (2) and the workbench base plate (1). The lower side of the base plate (2) is fixedly connected with four or more sets of shock-absorbing frames (15).

8. A net-casting machine according to claim 1, characterized in that, The marble guide rail base (22) is slidably connected to the marble guide rail beam (4) via a linear guide rail, and the marble guide rail beam (4) is slidably connected to the machine head base (6) via a linear guide rail. The machine head base (6) is fitted with a machine head cover (5) on its front side.

9. A net-casting machine according to claim 1, characterized in that, The cylinder-electric cylinder linkage tension valve (7) is provided in sixty-six groups, and the sixty-six groups of cylinder-electric cylinder linkage tension valve (7) are respectively arranged around the opening, which is located on the upper part of the workbench base plate (1).

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