High-precision printing device and printing method for optical film

Abstract

The invention relates to the technical field of printing devices, in particular to a high-precision printing device and method for an optical film. Comprising a workbench, a sliding frame is arranged on the workbench, a fixing frame is installed on the sliding frame, a silk screen is installed on the fixing frame, and an electric sliding block is arranged on the sliding frame; the two electric control frames are both installed on the electric sliding blocks, and fixed scraping plates are arranged on the lower sides of the electric control frames; and the two sliding blocks are connected to the fixed frame in a sliding mode, the sliding block on one side is connected with a first supporting plate in a sliding mode, and the sliding block on the other side is fixedly connected with a second supporting plate. By moving the first supporting plate and the second supporting plate, printing ink accumulated at the edge of the moving range of the fixed scraping plate is removed, and the situation that the accumulated printing ink is mixed into printing ink again after being dried and caked, printing holes of a silk screen are blocked, and the printing precision and quality of the device are affected is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of printing devices, and in particular to a high-precision printing device and a printing method for optical films. Background Art

[0002] Optical film is a thin film material used to improve the transmission, reflection or scattering properties of light. It is widely used in liquid crystal displays and various optical devices. The manufacturing process of optical film usually includes the steps of substrate selection, coating treatment, curing and subsequent processing. A high-precision printing device is usually used to form precise lines and patterns on the optical film. The working process of the existing high-precision printing device for optical film is as follows: a piece of optical film is moved to the optical plate for precise positioning; the screen is covered on the optical film by lowering the frame; ink is added to the screen, and the ink on the screen is scraped with a scraper; the ink passes through specific printing holes on the screen to form set lines on the optical film, and the frame drives the screen to move upward and reset, and at the same time the scraper is reset and a layer of ink is re-applied on the surface of the screen; the printed optical film is removed for ink curing.

[0003] However, during the operation of the existing printing device, since the ink has a certain fluidity, when the scraper drives the ink to move, when the scraper stops moving, the ink will still diffuse a short distance under the action of inertia, causing part of the ink to gradually accumulate on both sides of the edge of the scraper's working range. As the printing device continues to work, the accumulated ink will gradually become viscous and clump. When the scraper descends to push the ink, some of the agglomerated ink will mix into the moving ink, causing some of the printing holes on the silk screen to be blocked, making the edges of the printed pattern blurred or the shape distorted, seriously affecting the accuracy of optical film printing. At the same time, the dried ink increases the difficulty of subsequent cleaning of the equipment. Summary of the invention

[0004] In view of the fact that ink may accumulate outside the moving range of a scraper and the accumulated ink may be mixed into the moving ink, the present invention provides a high-precision printing device and a printing method for an optical film.

[0005] The technical solution is as follows: A high-precision printing device and printing method for optical films, comprising: a workbench, a feeding mechanism and a sliding frame are provided on the workbench, a fixed frame is installed on the sliding frame, a screen is installed on the fixed frame, an electric slide rail is provided on the sliding frame, and an electric slider is provided on the electric slide rail of the sliding frame; two electric control frames are both installed on the electric slider, and a fixed scraper is provided on the lower side of the electric control frame; two sliding blocks are both slidably connected to the fixed frame, the sliding block on one side is slidably connected to a first support plate, and the sliding block on the other side is fixedly connected to a second support plate, the first support plate and the second support plate are used to clean excess ink on the screen; a pushing mechanism is provided on the electric control frame on one side, and is used to assist in cleaning excess ink on the moving path of the fixed scraper; a collecting mechanism is provided on the fixed frame, and is used to recover the accumulated excess ink.

[0006] As a preferred embodiment of the present invention, the two fixed scrapers are both in an inclined state, and a slope is provided on the side of the first support plate close to the fixed scraper, the inclination angle of the first support plate slope is equal to the inclination angle of the fixed scraper, and the slope of the first support plate is used to slide in contact with the adjacent fixed scraper.

[0007] As a preferred embodiment of the present invention, the pushing mechanism includes: a connecting frame, slidably connected to the electric control frame on one side; two connecting blocks, fixedly connected to the connecting frame, the connecting blocks slide on the fixed frame, the connecting blocks are rotatably connected to a rotating plate, and the rotating plate is used to clean and gather excess ink on the moving path of the fixed scraper; a control component is arranged on the fixed frame, and is used to control the movement sequence of the first support plate and the second support plate.

[0008] As a preferred embodiment of the present invention, the control component includes: two motors, both of which are arranged on the fixed frame, two lead screws are rotatably connected in the fixed frame, and the output shafts of the motors are fixedly connected to adjacent lead screws; a transmission block, slidably connected to a side of the fixed frame close to the first support plate, the transmission block is slidably connected to the adjacent sliding block, the transmission block is threadedly connected to the adjacent lead screw, and the other lead screw is threadedly connected to the adjacent sliding block, and the transmission block is used to push the adjacent sliding block to move; a sliding support block, slidably connected to the sliding block close to the first support plate, a first spring is fixedly connected between the first support plate and the sliding support block, a V-shaped plate is arranged on the transmission block, and the transmission block moves the sliding support block through the V-shaped plate.

[0009] As a preferred embodiment of the present invention, the control assembly further comprises: a limit block fixedly connected in the fixed frame, a torsion spring is provided at the rotation connection between the rotating plate and the connecting block, and the limit block is used to push the rotating plate to rotate.

[0010] As a preferred embodiment of the present invention, the collecting mechanism includes: a fixed cylinder, fixedly connected to the fixed frame, a piston rod being slidably connected inside the fixed cylinder; a drawing pipe, connected to the fixed cylinder, the drawing pipe is configured as a multi-way pipe, a one-way valve is provided inside the drawing pipe, and the drawing pipe collects residual ink accumulated on the silk screen through multiple pipe openings; a connecting pipe, connected to the fixed cylinder; a delay assembly, provided on the piston rod, for enabling the drawing pipe to start drawing after the residual ink has accumulated.

[0011] As a preferred embodiment of the present invention, the delay assembly includes: a connecting bent rod, fixedly connected to the piston rod, the connecting bent rod is slidably connected to the adjacent sliding block, a second spring is provided on the connecting bent rod, the second spring on the connecting bent rod is used to enable the adjacent sliding block to drive the piston rod to move, a third spring is fixedly connected between the piston rod and the fixed cylinder; a limit pin, slidably connected to the fixed cylinder, a fourth spring is fixedly connected between the limit pin and the fixed frame, a blind hole is provided on the piston rod, and the limit pin is used to limit the piston rod through the blind hole.

[0012] As a preferred embodiment of the present invention, it also includes: a cleaning mechanism, which is arranged on the electric control frame on one side, and is used to clean the residual ink on the adjacent fixed scraper, and the cleaning mechanism includes: a fixed plate, which is fixedly connected to the electric control frame on one side; a T-shaped plate, which is slidably connected to the electric control frame on the other side, and a fifth spring is fixed between the fixed plate and the T-shaped plate, and the T-shaped plate is slidably connected to the adjacent fixed scraper; a trigger assembly, which is arranged on the electric control frame close to the T-shaped plate, and is used to control the movement of the T-shaped plate.

[0013] As a preferred embodiment of the present invention, the trigger assembly includes: a limit plate, slidably connected to the electric control frame close to the T-shaped plate, a sixth spring is arranged between the limit plate and the adjacent electric control frame, a limit hole is arranged on the T-shaped plate, and the limit plate limits the T-shaped plate through the limit hole; a fixed support plate, fixedly connected to the sliding frame, and the fixed support plate is used to push the limit plate to move.

[0014] A high-precision printing method for an optical film, based on the above-mentioned high-precision printing device for an optical film, comprises the following steps: S1: The feeding mechanism moves the optical film to the workbench, the sliding frame moves downward, the screen on the fixed frame adheres to the optical film, the two electric control frames move in opposite directions, the T-shaped plate is reset, the electric slider drives the fixed scraper on one side to move, the fixed scraper drives the ink to move and complete the printing of the optical film, and the limit plate limits the T-shaped plate through the limit hole; S2: When the electric slider moves to the limit, the optical film printing is completed, the two electric control frames move to the opposite direction again to reset, the sliding frame moves upward to reset, the limit block rotates the rotating plate, the motor controls the transmission block to push the sliding block and the first support plate to move and remove the excess ink on the screen surface, then the electric slider moves to reset, the rotating plate rotates to reset, the fixed scraper re-applies a layer of ink, and the two rotating plates push the excess ink beyond the moving range of the fixed scraper to one side of the fixed frame; S3: When the electric slider moves and resets, the fixed support plate pushes the limit plate, and the limit plate moves out of the limit hole of the T-shaped plate. The T-shaped plate cleans the surface of the fixed scraper by moving, and the motor controls the sliding block and the second support plate to move to gather excess ink. The sliding block controls the movement of the connecting bent rod and the piston rod through the second spring, and the limit pin releases the limit on the piston rod. The fixed cylinder extracts the gathered ink through the extraction pipe, and then the first support plate and the second support plate move and reset, the connecting bent rod and the piston rod move and reset, and the ink in the fixed cylinder is discharged through the connecting pipe, and then the optical film is printed again.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention removes the ink accumulated on the edge of the moving range of the fixed scraper by moving the first support plate and the second support plate, thereby preventing the accumulated ink from drying and agglomerating and then being re-mixed into the printed ink, causing the printing holes of the screen to be blocked, thereby affecting the printing accuracy and quality of the device.

[0016] 2. The present invention extracts excess ink on the screen through the fixed cylinder and the extraction tube in the collecting mechanism, and combines the operation of the rotating plate with the first support plate and the second support plate to gather the ink, so as to quickly remove the ink on the screen that is outside the moving range of the fixed scraper, effectively avoiding the drying of the ink on the screen and ensuring the convenience of cleaning the screen.

[0017] 3. The present invention removes residual ink on the surface of the fixed scraper after each printing by moving the T-shaped plate in the cleaning mechanism in contact with the surface of the fixed scraper, so as to keep the surface of the fixed scraper clean and ensure the stability of the extrusion force and angle of the fixed scraper on the screen and ink. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the parts of the sliding frame and the fixed frame of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the parts at the connecting frame and the connecting block of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the sliding block and the lead screw parts of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the sliding block and the first support plate parts of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the parts of the transmission block and the sliding support block of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the parts at the connecting block and the rotating plate of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the rotating plate of the present invention in a rotating state; Fig. 9 It is a three-dimensional structural schematic diagram of the parts of the material extraction pipe and the connecting pipe of the present invention; Fig.10 It is a three-dimensional structural schematic diagram of the parts connecting the bent rod and the limit pin of the present invention; Fig.11 It is a three-dimensional structural schematic diagram of the parts at the T-shaped plate and the limiting plate of the present invention; Fig.12 It is a three-dimensional structural schematic diagram of the parts at the fixing plate and the T-shaped plate of the present invention.

[0019] Markings in the accompanying drawings: 1-workbench, 2-feeding mechanism, 3-sliding frame, 4-fixed frame, 5-electric slider, 6-electric control frame, 7-fixed scraper, 8-sliding block, 9-first support plate, 10-second support plate, 21-connecting frame, 22-connecting block, 23-rotating plate, 31-motor, 32-screw, 33-transmission block, 34-sliding support block, 42-limiting block, 51-fixed cylinder, 52-piston rod, 53-drawing pipe, 54-connecting pipe, 61-connecting bent rod, 62-limiting pin, 71-fixed plate, 72-T-shaped plate, 81-limiting plate, 82-fixed support plate. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1 -Attached Fig.12 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0021] Example 1: During the operation of the existing high-precision printing device for optical films, since the ink has a certain fluidity, part of the ink will gradually accumulate on both sides of the scraper's moving range during the process of the scraper driving the ink to print. When the scraper initially drives the ink to move, part of the accumulated dry and agglomerated ink will be mixed into the moving ink, causing part of the printing holes of the screen to be blocked, affecting the printing accuracy of the optical film.

[0022] A high-precision printing device and printing method for optical film, please refer to the attached Figure 1 -Attached Figure 5As shown, it includes: a workbench 1, on which a feeding mechanism 2 and a sliding frame 3 are arranged, on which a fixed frame 4 is installed, on which a screen is installed, on which an electric slide rail is arranged, on which an electric slide rail of the sliding frame 3 is arranged, and on which an electric slide block 5 is arranged; two electric control frames 6, both of which are installed on the electric slide block 5, and on which a fixed scraper 7 is arranged at the lower side of the electric control frame 6; two sliding blocks 8, both of which are slidably connected to the fixed frame 4, and the sliding block 8 on one side is slidably connected to a first support plate 9, and the sliding block 8 on the other side is fixedly connected to a second support plate 1 0, the first support plate 9 and the second support plate 10 are used to clean the excess ink on the screen; the pushing mechanism is arranged on the electric control frame 6 on one side, and is used to assist in cleaning the excess ink on the moving path of the fixed scraper 7; the collecting mechanism is arranged on the fixed frame 4, and is used to recover the accumulated excess ink. The two fixed scrapers 7 are both in an inclined state. The first support plate 9 is provided with an inclined surface on the side close to the fixed scraper 7. The inclination angle of the inclined surface of the first support plate 9 is equal to the inclination angle of the fixed scraper 7. The inclined surface of the first support plate 9 is used to slide in contact with the adjacent fixed scraper 7.

[0023] In the above scheme, it is intended to solve the problem that some tiny lumps will gradually appear in the ink accumulated outside the moving range of the fixed scraper 7, and when the fixed scraper 7 pushes the accumulated ink for printing, some of the lumped ink will be mixed into the moving ink, causing the printing holes on the silk screen to be easily blocked; a control panel is provided on the workbench 1, and an ink adding device is provided at the right fixed scraper 7. The feeding mechanism 2, the sliding frame 3, the electric slider 5, the ink adding device and the pushing mechanism are all electrically connected to the control panel on the workbench 1. The control panel controls the sliding frame 3 to move up and down through the workbench 1. The optical plate is located directly below the fixed frame 4 on the workbench 1, and the silk screen covers the lower side of the fixed frame 4.

[0024] The two fixed scrapers 7 move alternately up and down when moving, and the fixed scraper 7 is inclined to the left from top to bottom. The left fixed scraper 7 is used to scrape the ink for printing, and the right fixed scraper 7 is used to re-apply a layer of ink on the silk screen. Initially, the electric slider 5 is located above the left part of the fixed frame 4, and the middle part of the upper surface of the silk screen at the fixed frame 4 is covered with a layer of ink. The lower sides of the first support plate 9 and the second support plate 10 are always in contact with the silk screen. Through the movement of the first support plate 9 and the second support plate 10, the residual ink on the silk screen at the fixed frame 4 outside the moving range of the fixed scraper 7 is removed to avoid the accumulation of ink mixed with the printing ink, which affects the accuracy of silk screen printing.

[0025] Working process: when using this device to print an optical film, the operator starts this device through the control panel. The control panel first starts the feeding mechanism 2, and the feeding mechanism 2 moves the optical film to the optical plate of the workbench 1 and positions the optical film. Then the control panel controls the sliding frame 3 to drive the fixed frame 4 to move downward. When the screen on the lower side of the fixed frame 4 is in contact with the optical film, the sliding frame 3 stops moving. At the same time, the control panel controls the left electric control frame 6 to move downward and the right electric control frame 6 to move upward through the electric slider 5. When the left fixed scraper 7 contacts the screen, the electric control frame 6 stops moving. Then the control panel controls the electric slider 5 to move to the left. The left fixed scraper 7 scrapes the ink on the surface of the screen and pushes the ink through the printing holes of the screen to complete the printing operation. When the fixed scraper 7 moves to the rightmost side within the moving range of the electric slider 5, the control panel turns off the electric slider 5 and starts the sliding frame 3. The sliding frame 3 drives the fixed frame 4 to move upward. Then the feeding mechanism 2 transports the printed optical film to the right to solidify the ink printed on the optical film.

[0026] When the electric slider 5 is closed, the control panel drives the right sliding block 8 to move forward through the pushing mechanism. The first support plate 9 clears the residual ink on the right side of the moving range of the fixed scraper 7 on the screen. At the same time, the control panel controls the two electric control frames 6 to move and reset. The left fixed scraper 7 moves upward and resets. The left fixed scraper 7 loses contact with the screen and the right fixed scraper 7 moves downward. When the right fixed scraper 7 moves to a point where there is only a small gap with the screen, the electric control frame 6 stops moving. Then the control panel controls the electric slider 5 to move to the left and reset. The fixed scraper 7 moves to the left, and the ink adding device moves to the right. The ink is replenished at the fixed scraper 7, and the fixed scraper 7 on the right side re-spreads a layer of ink on the surface of the screen. When the electric slider 5 moves and resets, the pushing mechanism controls the left sliding block 8 to drive the second support plate 10 to move forward to gather residual ink. When the residual ink is gathered, the collecting mechanism recycles the gathered ink, and the recovered ink can be processed twice to achieve the purpose of reuse. Finally, the pushing mechanism controls the two sliding blocks 8 to move and reset, and the collecting mechanism moves and resets synchronously. The above operations are repeated continuously to carry out continuous printing of the optical film. When the printing of all optical films is completed, all parts are restored to their initial positions.

[0027] For further information, please refer to the attached Figure 2 -Attached Figure 8As shown, the pushing mechanism includes: a connecting frame 21, which is slidably connected to the electric control frame 6 on one side; two connecting blocks 22, which are fixed to the connecting frame 21, and the connecting block 22 slides on the fixed frame 4, and the connecting block 22 is rotatably connected to a rotating plate 23, and the rotating plate 23 is used to clean and collect excess ink on the moving path of the fixed scraper 7; a control component, which is arranged on the fixed frame 4 and is used to control the movement sequence of the first support plate 9 and the second support plate 10, and the control component includes: two motors 31, which are both arranged on the fixed frame 4, and two lead screws 32 are rotatably connected in the fixed frame 4, and the output shaft of the motor 31 is fixed to the adjacent lead screw 32; a transmission block 33, which is slidably connected to the fixed frame 4 near the first support plate On one side of 9, the transmission block 33 is slidably connected to the adjacent sliding block 8, the transmission block 33 is threadedly connected to the adjacent lead screw 32, and the other lead screw 32 is threadedly connected to the adjacent sliding block 8. The transmission block 33 is used to push the adjacent sliding block 8 to move; the sliding support block 34 is slidably connected to the sliding block 8 close to the first support plate 9, and a first spring is fixedly connected between the first support plate 9 and the sliding support block 34. A V-shaped plate is provided on the transmission block 33, and the transmission block 33 moves the sliding support block 34 through the V-shaped plate. The control component also includes: a limit block 42, which is fixedly connected to the fixed frame 4, and a torsion spring is provided at the rotation connection between the rotating plate 23 and the connecting block 22, and the limit block 42 is used to push the rotating plate 23 to rotate.

[0028] In the above scheme, the purpose is to uniformly scrape and gather excess ink around the moving range of the two fixed scrapers 7 on the silk screen to prevent the ink from stagnating for a long time on the silk screen; the two rotating plates 23 are tightly fitted with the fixed scraper 7 on the right side in the vertical state, and are used to collect the ink overflowing on the front and rear sides of the fixed scraper 7 during the movement of the fixed scraper 7 to prevent the ink from being retained and dried on the silk screen, making it difficult to quickly clean the silk screen later. The motor 31 is electrically connected to the control panel, and the transmission block 33 is located on the rear side of the right sliding block 8.

[0029] Working process: When the electric slider 5 moves to the right, the right electric control frame 6 drives the connecting block 22 and the rotating plate 23 to move to the right synchronously through the connecting frame 21. When the electric slider 5 moves to the right to the limit, the front rotating plate 23 is squeezed by the limit block 42 and rotates clockwise (from top to bottom). The torsion spring at the rotating connection between the front rotating plate 23 and the connecting block 22 is twisted and stored, and the front rotating plate 23 becomes tilted (as shown in the attached figure). Figure 8As shown), the control panel then moves the two electric control frames 6 to reset, the right fixed scraper 7 moves downward close to the screen, the right fixed scraper 7 contacts and squeezes the inclined surface of the first support plate 9, and the first support plate 9 moves to the right, and at the same time the control panel starts the motor 31 on the right, the output shaft of the motor 31 on the right drives the lead screw 32 to rotate, the transmission block 33 moves forward, the transmission block 33 is inserted between the sliding block 8 and the sliding support block 34 on the right, the sliding support block 34 moves to the left relative to the sliding block 8, the sliding support block 34 pushes the first support plate 9 to move to the left through the first spring, the inclined surface of the first support plate 9 fits the fixed scraper 7 on the right, compresses the first spring between the sliding support block 34 and the first support plate 9, and then the transmission block 33 pushes the first support plate 9 forward through the sliding block 8, and the first The support plate 9 scrapes off the excess ink on the right side of the fixed scraper 7 and pushes it forward. Finally, when the first support plate 9 contacts the front rotating plate 23, the control panel turns off the right motor 31, and the excess ink on the right side of the fixed scraper 7 enters the left side of the front rotating plate 23. Then the control panel controls the electric slider 5 to move and reset. When the front rotating plate 23 loses contact with the first support plate 9, the front rotating plate 23 rotates and resets under the elastic force of the torsion spring connected to it, and the front rotating plate 23 resumes its close fit with the fixed scraper 7. The two rotating plates 23 move and reset with the right electric control frame 6. The two rotating plates 23 scrape and collect the overflowed ink on the front and rear sides during the movement of the fixed scraper 7. Finally, after the electric slider 5 is reset, the excess ink on the surface of the screen is located on the left side of the two rotating plates 23.

[0030] When the electric slider 5 moves to reset, the control panel starts the left motor 31, and the output shaft of the left motor 31 drives the second support plate 10 to move forward through the lead screw 32 and the sliding block 8. The second support plate 10 scrapes off the ink accumulated on the left sides of the two rotating plates 23 and collects them on the left front side of the screen. The front rotating plate 23 is controlled to rotate by the limit block 42, so that the front rotating plate 23 deflects to the rightmost side, and cooperates with the movement of the first support plate 9 to collect the residual ink outside the edge of the moving range of the two fixed scrapers 7 to the lower left part of the fixed frame 4 to prevent the accumulation of residual ink. The distance between the fixed scraper 7 and the moving range edge is too close to ensure the consistency of the ink quality used for printing on the screen. The collecting mechanism extracts and reuses the excess ink accumulated on the screen. Finally, the control panel controls the output shafts of the two motors 31 to reverse, and the transmission block 33 moves out from between the sliding block 8 and the sliding support block 34. The sliding support block 34 moves and resets under the elastic force of the connected first spring. The transmission block 33 drives the sliding block 8 to move backward, and the first support plate 9 and the second support plate 10 both return to their initial positions. At this point, all parts in the device return to their initial positions.

[0031] For further information, please refer to the attached Figure 3 , Attachment Fig. 9 and attached Fig.10As shown, the collecting mechanism includes: a fixed cylinder 51, fixedly connected to the fixed frame 4, a piston rod 52 is slidably connected in the fixed cylinder 51; a pumping pipe 53, connected to the fixed cylinder 51, the pumping pipe 53 is set as a multi-way pipe, a one-way valve is set in the pumping pipe 53, and the pumping pipe 53 collects the residual ink accumulated on the screen through multiple pipe openings; a connecting pipe 54, connected to the fixed cylinder 51; a delay component, set on the piston rod 52, used to make the pumping pipe 53 start to extract after the residual ink is accumulated, and the delay component includes: a connecting pipe 54, ... The bent rod 61 is fixedly connected to the piston rod 52, and the connecting bent rod 61 is slidably connected to the adjacent sliding block 8. A second spring is arranged on the connecting bent rod 61, and the second spring on the connecting bent rod 61 is used to enable the adjacent sliding block 8 to drive the piston rod 52 to move. A third spring is fixedly connected between the piston rod 52 and the fixed cylinder 51; a limit pin 62 is slidably connected to the fixed cylinder 51, and a fourth spring is fixedly connected between the limit pin 62 and the fixed frame 4. A blind hole is arranged on the piston rod 52, and the limit pin 62 is used to limit the piston rod 52 through the blind hole.

[0032] In the above scheme, it is intended to solve the problem that if ink is retained on the silk screen for a long time, it will cause corrosion to the silk screen, increase the difficulty of cleaning the silk screen later, and reduce the service life of the silk screen; the resistance of the limit pin 62 to limit the piston rod 52 is less than the maximum compression elastic force of the second spring connected to the connecting bent rod 61, and the one-way valve in the extraction tube 53 only allows the excess ink accumulated on the silk screen to be extracted into the fixed cylinder 51. The connecting tube 54 is externally connected to a recovery mechanism for recovering the excess ink on the silk screen and reusing it. The excess ink on the silk screen is collected by the fixed cylinder 51 and the extraction tube 53 to avoid the situation where the ink dries up on the silk screen, thereby ensuring the speed of cleaning the silk screen later and extending the service life of the silk screen.

[0033] Working process: During the forward movement of the second support plate 10, the sliding block 8 on the left side moves forward relative to the connecting bent rod 61, and the sliding block 8 on the left side gradually compresses the second spring on the connecting bent rod 61, and the connecting bent rod 61 gradually increases the pulling force of the piston rod 52 forward. When the second spring at the connecting bent rod 61 is compressed to the limit, the piston rod 52 moves forward, the limit pin 62 first moves to the right and compresses the fourth spring, the limit of the piston rod 52 is released, and the piston rod 52 compresses the third spring connected to it. The second support plate 10 gathers excess ink to multiple nozzles of the extraction tube 53, and the fixed cylinder 51 extracts the material The tube 53 extracts the ink gathered on the screen, and then during the process of the first support plate 9 and the second support plate 10 moving and resetting, the second spring at the connecting bent rod 61 gradually moves and resets, and restores the initial state, and the piston rod 52 moves backward and resets under the elastic force of the third spring, and the ink collected in the fixed cylinder 51 is injected into the recovery mechanism through the connecting tube 54. When the limit pin 62 is aligned with the blind hole on the piston rod 52, the limit pin 62 is reinserted into the blind hole of the piston rod 52 under the elastic force of the fourth spring connected thereto, and the piston rod 52 returns to its initial state. At this point, all parts in the device have returned to their initial states.

[0034] Example 2: Based on Example 1, please refer to the attached Figure 2 , Attachment Fig. 9 , Attachment Fig.11 and attached Fig.12 As shown, it also includes: a cleaning mechanism, which is arranged on the electric control frame 6 on one side and is used to clean the residual ink on the adjacent fixed scraper 7. The cleaning mechanism includes: a fixed plate 71, which is fixedly connected to the electric control frame 6 on one side; a T-shaped plate 72, which is slidably connected to the electric control frame 6 on the other side, a fifth spring is fixedly connected between the fixed plate 71 and the T-shaped plate 72, and the T-shaped plate 72 is slidably connected to the adjacent fixed scraper 7; a trigger component, which is arranged on the electric control frame 6 near the T-shaped plate 72 and is used to control the movement of the T-shaped plate 72, and the trigger component includes: a limit plate 81, which is slidably connected to the electric control frame 6 near the T-shaped plate 72, a sixth spring is arranged between the limit plate 81 and the adjacent electric control frame 6, a limit hole is arranged on the T-shaped plate 72, and the limit plate 81 limits the T-shaped plate 72 through the limit hole; a fixed support plate 82, which is fixedly connected to the sliding frame 3, and the fixed support plate 82 is used to push the limit plate 81 to move.

[0035] In the above scheme, it is intended to solve the problem that during the operation of the device, some ink will remain on the surface of the fixed scraper 7 after each printing. As the working time of the fixed scraper 7 increases, the squeezing force and angle of the fixed scraper 7 on the screen will change, affecting the printing quality of the optical film; initially, the limiting plate 81 is not inserted into the limiting hole of the T-shaped plate 72, and the lower end of the T-shaped plate 72 is always in contact with the right side of the left fixed scraper 7 in contact with the ink during the movement. Initially, the sixth spring connected to the limiting plate 81 is in a compressed state, and the fixed plate 71 is moved instantly through the cooperation of the groove on the limiting plate 81 and the fixed plate 71, so that the fixed plate 71 moves instantly, and the residual ink on the fixed scraper 7 is quickly removed, so that the surface of the fixed scraper 7 is clean, and the force and angle of the fixed scraper 7 squeezing the ink and the screen are stable.

[0036] Working process: when the electric slider 5 moves to the right to the limit and closes, the left electric control frame 6 moves upward, and the right electric control frame 6 moves downward. At this time, the limit plate 81 is inserted into the limit hole of the T-shaped plate 72, and the T-shaped plate 72 cannot move. The fifth spring between the fixed plate 71 and the T-shaped plate 72 is compressed, and then the control panel controls the electric slider 5 to move to the left and reset. When the electric slider 5 is about to reset, the fixed support plate 82 contacts the limit plate 81, and the limit plate 81 stops moving. As the electric slider 5 gradually moves to the right, the limit plate 81 moves to the right relative to the left electric control frame 6, and the sixth spring connected to the limit plate 81 is compressed. After the movement and reset, the limit plate 81 moves out from the limit hole of the T-shaped plate 72, and the T-shaped plate 72 moves downward under the elastic force of the fifth spring connected thereto, and the T-shaped plate 72 removes the ink on the surface of the left fixed scraper 7. Then, when the next optical film is printed, the left electric control frame 6 moves downward, and the right electric control frame 6 moves upward, and the fixed plate 71 drives the T-shaped plate 72 to move and reset through the fifth spring. When the electric slider 5 moves to the right again, the limit plate 81 and the fixed support plate 82 lose contact, and the limit plate 81 moves and resets under the elastic force of the sixth spring connected thereto, and the limit plate 81 is inserted into the limit hole of the T-shaped plate 72.

[0037] Example 3: Based on Example 2, please refer to the attached Figure 1 -Attached Fig.12 As shown, the present invention also provides a high-precision printing method for an optical film, based on the above-mentioned high-precision printing device for an optical film, comprising the following steps: S1: The feeding mechanism 2 moves the optical film onto the workbench 1, the sliding frame 3 moves downward, the screen on the fixed frame 4 is attached to the optical film, the two electric control frames 6 move in opposite directions, the T-shaped plate 72 is reset, the electric slider 5 drives the fixed scraper 7 on one side to move, the fixed scraper 7 drives the ink to move and completes the printing of the optical film, and the limit plate 81 limits the T-shaped plate 72 through the limit hole; S2: When the electric slider 5 moves to the limit, the optical film printing is completed, the two electric control frames 6 move to the opposite direction again to reset, the sliding frame 3 moves upward to reset, the limit block 42 makes the rotating plate 23 rotate, the motor 31 controls the transmission block 33 to push the sliding block 8 and the first support plate 9 to move and remove the excess ink on the screen surface, then the electric slider 5 moves to reset, the rotating plate 23 rotates to reset, the fixed scraper 7 re-applies a layer of ink, and the two rotating plates 23 push the excess ink beyond the moving range of the fixed scraper 7 to one side of the fixed frame 4; S3: When the electric slider 5 moves and resets, the fixed support plate 82 pushes the limit plate 81, and the limit plate 81 moves out of the limit hole of the T-shaped plate 72. The T-shaped plate 72 cleans the surface of the fixed scraper 7 by moving, and the motor 31 controls the sliding block 8 and the second support plate 10 to move to gather excess ink. The sliding block 8 controls the movement of the connecting bent rod 61 and the piston rod 52 through the second spring, and the limit pin 62 releases the limit on the piston rod 52. The fixed cylinder 51 extracts the gathered ink through the extraction pipe 53, and then the first support plate 9 and the second support plate 10 move and reset, the connecting bent rod 61 and the piston rod 52 move and reset, and the ink in the fixed cylinder 51 is discharged through the connecting pipe 54, and then the optical film is printed again.

[0038] The present invention and its embodiments are described above, which is not restrictive. What is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and do not deviate from the purpose of the invention, they can creatively design structural methods and embodiments similar to the technical scheme, which should all fall within the scope of protection of the present invention.

Claims

1. A high-precision printing device for optical films, characterized in that: include: A workbench (1), wherein the workbench (1) is provided with a feeding mechanism (2) and a sliding frame (3), the sliding frame (3) is provided with a fixed frame (4), the fixed frame (4) is provided with a wire mesh, the sliding frame (3) is provided with an electric slide rail, and the electric slide rail of the sliding frame (3) is provided with an electric slider (5); Two electric control frames (6) are both mounted on the electric slider (5), and a fixed scraper (7) is provided on the lower side of the electric control frame (6); Two sliding blocks (8) are both slidably connected to the fixed frame (4), the sliding block (8) on one side is slidably connected to a first support plate (9), and the sliding block (8) on the other side is fixedly connected to a second support plate (10), and the first support plate (9) and the second support plate (10) are used to clean excess ink on the silk screen; A material pushing mechanism, arranged on the electric control frame (6) on one side, for assisting in cleaning excess ink on the moving path of the fixed scraper (7); The collecting mechanism is arranged on the fixing frame (4) and is used for recovering the accumulated excess ink.

2. A high-precision printing device for optical films according to claim 1, characterized in that: The two fixed scrapers (7) are both in an inclined state, and a slope is provided on a side of the first support plate (9) close to the fixed scraper (7), the slope angle of the slope of the first support plate (9) is equal to the slope angle of the fixed scraper (7), and the slope of the first support plate (9) is used to slide in contact with the adjacent fixed scraper (7).

3. A high-precision printing device for optical films according to claim 2, characterized in that: The pushing mechanism comprises: A connecting frame (21) slidably connected to the electric control frame (6) on one side; Two connecting blocks (22) are fixedly connected to the connecting frame (21), the connecting blocks (22) slide on the fixed frame (4), the connecting blocks (22) are rotatably connected to a rotating plate (23), and the rotating plate (23) is used to clean and collect excess ink on the moving path of the fixed scraper (7); A control component is arranged on the fixed frame (4) and is used to control the movement sequence of the first support plate (9) and the second support plate (10).

4. A high-precision printing device for optical films according to claim 3, characterized in that: The control component comprises: Two motors (31) are both arranged on the fixed frame (4), two lead screws (32) are rotatably connected in the fixed frame (4), and the output shaft of the motor (31) is fixedly connected to the adjacent lead screw (32); A transmission block (33) is slidably connected to a side of the fixed frame (4) close to the first support plate (9), the transmission block (33) is slidably connected to the adjacent sliding block (8), the transmission block (33) is threadedly connected to the adjacent lead screw (32), another lead screw (32) is threadedly connected to the adjacent sliding block (8), and the transmission block (33) is used to push the adjacent sliding block (8) to move; A sliding support block (34) is slidably connected to the sliding block (8) close to the first support plate (9); a first spring is fixedly connected between the first support plate (9) and the sliding support block (34); a V-shaped plate is provided on the transmission block (33); and the transmission block (33) moves the sliding support block (34) via the V-shaped plate.

5. The high-precision printing device for optical film according to claim 4, characterized in that: The control component also includes: The limit block (42) is fixedly connected in the fixed frame (4); a torsion spring is provided at the rotation connection between the rotating plate (23) and the connecting block (22); and the limit block (42) is used to push the rotating plate (23) to rotate.

6. A high-precision printing device for optical films according to claim 5, characterized in that: The collection agencies include: A fixed cylinder (51) is fixedly connected to the fixed frame (4), and a piston rod (52) is slidably connected inside the fixed cylinder (51); A material extraction pipe (53) is connected to the fixed cylinder (51); the material extraction pipe (53) is configured as a multi-way pipe, a one-way valve is provided in the material extraction pipe (53), and the material extraction pipe (53) collects residual ink accumulated on the screen through a plurality of pipe openings; A connecting pipe (54) connected to the fixing cylinder (51); A delay component is arranged on the piston rod (52) and is used to enable the extraction tube (53) to start extraction after residual ink has accumulated.

7. The high-precision printing device for optical film according to claim 6, characterized in that: The delay component comprises: a connecting bent rod (61) fixedly connected to the piston rod (52); the connecting bent rod (61) is slidably connected to the adjacent sliding block (8); a second spring is provided on the connecting bent rod (61); the second spring on the connecting bent rod (61) is used to enable the adjacent sliding block (8) to drive the piston rod (52) to move; a third spring is fixedly connected between the piston rod (52) and the fixed cylinder (51); A limit pin (62) is slidably connected to the fixed cylinder (51); a fourth spring is fixedly connected between the limit pin (62) and the fixed frame (4); a blind hole is provided on the piston rod (52); and the limit pin (62) is used to limit the piston rod (52) through the blind hole.

8. The high-precision printing device for optical film according to claim 7, characterized in that: Also includes: A cleaning mechanism is arranged on the electric control frame (6) on one side and is used to clean the residual ink on the adjacent fixed scraper (7), and the cleaning mechanism comprises: A fixing plate (71) fixedly connected to the electric control frame (6) on one side; A T-shaped plate (72) is slidably connected to the electric control frame (6) on the other side, a fifth spring is fixedly connected between the fixed plate (71) and the T-shaped plate (72), and the T-shaped plate (72) is slidably connected to the adjacent fixed scraper plate (7); A trigger assembly is arranged on the electric control frame (6) close to the T-shaped plate (72) and is used to control the movement of the T-shaped plate (72).

9. The high-precision printing device for optical film according to claim 8, characterized in that: The trigger component comprises: a limit plate (81) slidably connected to the electric control frame (6) close to the T-shaped plate (72), a sixth spring being arranged between the limit plate (81) and the adjacent electric control frame (6), a limit hole being arranged on the T-shaped plate (72), and the limit plate (81) limiting the T-shaped plate (72) through the limit hole; A fixed support plate (82) is fixedly connected to the sliding frame (3), and the fixed support plate (82) is used to push the limiting plate (81) to move.

10. A high-precision printing method for an optical film, according to the high-precision printing device for an optical film according to claim 9, characterized in that: The steps include: S1: The feeding mechanism (2) moves the optical film onto the workbench (1), the sliding frame (3) moves downward, the screen on the fixed frame (4) is attached to the optical film, the two electric control frames (6) move in opposite directions, the T-shaped plate (72) is reset, the electric slider (5) drives the fixed scraper (7) on one side to move, the fixed scraper (7) drives the ink to move and completes the printing of the optical film, and the limiting plate (81) limits the T-shaped plate (72) through the limiting hole; S2: When the electric slider (5) moves to the limit, the optical film printing is completed, the two electric control frames (6) move again in the opposite direction to reset, the sliding frame (3) moves upward to reset, the limit block (42) causes the rotating plate (23) to rotate, the motor (31) controls the transmission block (33) to push the sliding block (8) and the first support plate (9) to move and remove the excess ink on the surface of the screen, then the electric slider (5) moves to reset, the rotating plate (23) rotates to reset, the fixed scraper (7) re-applies a layer of ink, and the two rotating plates (23) push the excess ink that exceeds the moving range of the fixed scraper (7) to one side of the fixed frame (4); S3: When the electric slider (5) moves to reset, the fixed support plate (82) pushes the limit plate (81), and the limit plate (81) moves out of the limit hole of the T-shaped plate (72). The T-shaped plate (72) cleans the surface of the fixed scraper (7) by moving. The motor (31) controls the sliding block (8) and the second support plate (10) to move and gather excess ink. The sliding block (8) controls the movement of the connecting bent rod (61) and the piston rod (52) through the second spring. The limit pin (62) releases the limit on the piston rod (52). The fixed cylinder (51) extracts the gathered ink through the extraction tube (53). Then, the first support plate (9) and the second support plate (10) move to reset, the connecting bent rod (61) and the piston rod (52) move to reset, and the ink in the fixed cylinder (51) is discharged through the connecting tube (54). Then, the optical film is printed again.

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