Manufacturing equipment and method for improving brightness of hot-press molded light guide plate

Abstract

The invention relates to the technical field of preparation and processing of light guide plates, in particular to manufacturing equipment and method for improving the brightness of a hot-press formed light guide plate. A side column is provided with a fixing assembly for fixing a turning plate, and the side wall of the side column is provided with a stand column driven through transverse stretching and retracting of a pull rod; a plurality of groups of thin wires which are vertically distributed at intervals are arranged between a pair of stand columns which are distributed front and back, the side walls of the sides, right opposite to the light guide plates, of the thin wires are sprayed, and the stand columns are vertically installed at the ends of pull rods in a lifting mode. According to the correction shaping device, coating permeation is avoided, meanwhile, mutual adhesion of the coating is prevented, it is guaranteed that the light guide plates are fully sprayed, mutual adhesion of the light guide plates is avoided, filaments located on the spraying end face and used for correction do not need to be withdrawn, and the correction shaping efficiency and the spraying quality are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of preparation and processing of light guide plates, and in particular to a device and method for improving the brightness of a hot-pressed light guide plate. Background Art

[0002] At present, except for small-sized mobile phones and tablets, other consumer display products basically use light guide plates or the same material to achieve the purpose of light refraction and diffusion. Most of the methods to improve the light effect of conventional thickness light guide plates are: adding white or silver side stickers on the light-emitting side or non-light-incoming side of the light guide plate to achieve the purpose of improving brightness. The thickness of the light guide plates in display products below 18 inches is within 1mm. The thinner the product thickness, the narrower the side stickers that should be used. In this way, the side stickers can easily exceed the edge of the light guide plate and cause poor adhesion. The existing conventional thinner light guide plates generally do not choose this method to improve the light effect of the light guide plate.

[0003] The existing patent CN201210340545.8 discloses a spraying device and a spraying process of a reflective shading film on the side of a light guide plate, including an inkjet mechanism, a light guide plate, a light guide plate shaping and positioning device, a spray device booster cylinder, an inkjet hydraulic group, and a cylinder positioning device. The light guide plate is placed on an attachment platform, and a shaping and positioning device is installed in the middle of each stack of light guide plates. The nozzle of the inkjet mechanism is connected to the horizontal vertical surface of the light guide plate, and the cylinder positioning device is located on the other horizontal vertical surface of the light guide plate. The other side of the cylinder positioning device is connected to the spray device booster cylinder, and the inkjet hydraulic group is located between the light guide plate and the booster cylinder.

[0004] In order to improve efficiency, the prior art usually adopts a stacking and palletizing method to place multiple groups of light guide plates, and then realizes shading spraying on the non-light incident side of the multiple groups of light guide plates through spraying. However, the prior art needs to use multiple groups of pneumatic or electric telescopic components to achieve the purpose of shaping the stacked light guide plates, fix and clamp them after shaping, and then withdraw the shaping device to avoid blocking the spray end face. This is not only difficult to operate, but also costly and inefficient. At the same time, in order to ensure the quality of spraying, it is necessary to ensure that adjacent light guide plates are tightly pressed together to avoid spray penetration. After integrated spraying, the spray paint is likely to block the end of the pressing gap. After the paint is baked and formed, the light guide plates are bonded to each other. Summary of the invention

[0005] The object of the present invention is to provide a device and method for improving the brightness of a hot-pressed light guide plate, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A device for improving the brightness of a hot-pressed light guide plate, comprising a manufacturing device, wherein the manufacturing device comprises a stacking trolley, the stacking trolley is transported on a conveyor belt, a cantilever support plate is arranged on the conveyor belt, one side of the lower end of the cantilever support plate is fixed by a bottom column, a tray for carrying the light guide plate is arranged in the middle of the upper end of the stacking trolley, a nozzle driven by a mechanical arm is arranged on one side of the cantilever support plate, a pair of front-to-back symmetrical right-angle side frames are arranged on one side of the stacking trolley, and a limiting A right-angled inner groove is provided at the end corner of one side of the light guide plate, and a flap is rotatably installed on the upper end of the right-angled side frame. A pressure block assembly is provided at the lower end of the flap and is pressed onto the upper end surface of the upper light guide plate. Side columns are symmetrically provided on the other side of the stacking trolley, and a fixing assembly for fixing the flap is provided on the side column. A column driven by horizontal extension and contraction through a pull rod is provided on the side wall of the side column. Multiple groups of vertically spaced filaments are provided between a pair of columns distributed front and back, and the filaments are sprayed on the side wall of the light guide plate on one side, and the column is vertically lifted and lowered and installed at the end of the pull rod.

[0007] Preferably, the cantilever support plate is located directly above the conveyor belt, and a pair of diagonal guide braces are symmetrically arranged on both sides of the cantilever support plate, the lower ends of the diagonal guide braces are in contact with the upper end surface of the conveyor belt, and the upper end of the cantilever support plate is provided with a pair of lifting blocks installed vertically and telescopically, and the lower end of the stacking trolley is provided with rollers, and the lifting blocks are against both sides of the rollers.

[0008] Preferably, the lateral width of the tray is smaller than the width of the light guide plate, a gap is left between the lower end of the tray and the bottom plate of the stacking trolley, a downwardly recessed reflow groove is provided on one side of the bottom plate of the stacking trolley, and an inclined guide plate is provided at one end of the tray, which is inclined downward along the gap to just above the reflow groove, and the upper end of the inclined guide plate is opposite to the lower end of the sprayed end face of the light guide plate.

[0009] Preferably, a connecting rod is provided on one side of the tray, the lower end of the right-angle side frame is slidably inserted on the connecting rod, a spring is sleeved on the connecting rod, the spring is pressed between the right-angle side frame and the tray, the end of the connecting rod is provided with a locking nut that is threadedly installed and pressed on the outer side wall of the right-angle side frame, a rotating seat is provided at the upper end of the right-angle side frame, a rotating rod is provided between a pair of rotating seats that are symmetrical front and back, and one end of the flap is rotatably sleeved on the rotating rod.

[0010] Preferably, a pair of side columns are respectively fitted with the front and rear side walls of the light guide plate, and ear seats are provided at the upper ends of the side columns. The ear seats and side columns are both located on the outside of the light guide plate, and vertically distributed cross beams are provided at the end of the flap, and both ends of the cross beams are pressed and fixed on the ear seats.

[0011] Preferably, a screw hole is penetrated through the ear seat, and a circular folding ring is provided at the upper end of the ear seat, the middle inner hole of the folding ring is opposite to the screw hole, the inner diameter of the middle inner hole of the folding ring is larger than the inner diameter of the screw hole, the end of the crossbeam is pressed on the folding ring, and a sleeve is provided on the crossbeam that coincides with the inner hole of the folding ring, a screw is vertically inserted in the sleeve, and the lower end of the screw is threaded and rotatably installed in the screw hole.

[0012] Preferably, a vertically extending longitudinal slot is provided through the column, the pull rod is configured as an electric telescopic rod, the end of the pull rod slides through and is inserted into the longitudinal slot, an end plate is provided at the end of the pull rod, the end plate is pressed onto the side wall of the column, and the outer diameter of the end plate is greater than the width of the longitudinal slot.

[0013] Preferably, the width between the multiple groups of filaments is equal to the thickness of the light guide plate, and the outer diameter of the filaments is less than 1 / 30 of the thickness of the light guide plate, a guide rail is vertically arranged at the lower end of the side column, a block slidably connected to the guide rail is arranged at the lower end of the column, and a telescopic rod for driving the column to rise and fall is vertically arranged at the upper end of the block.

[0014] Preferably, the pressure block assembly includes a first elastic pressure block and a second elastic pressure block, the first elastic pressure block is set to a cone shape and pressed on the upper end of the sprayed end of the upper light guide plate, the lower end of the second elastic pressure block is pressed on the middle position of the upper end of the upper light guide plate, and the first elastic pressure block and the second elastic pressure block are both made of elastic rubber material.

[0015] A method for improving the brightness of a hot-pressed light guide plate, the method comprising the following steps: Step 1: After the light guide plate raw materials are polished, the polished light guide plates are stacked and fixed in the stacking operation to enhance the brightness of the hot pressing forming light guide plate production equipment, ensuring that there is no obvious gap between the stacked light guide plates; Step 2: Customize and select the raw materials for plastic spraying particles. Choose silver or white plastic spraying particles, and the material must meet the RoHS standard; Step 3: The plastic particles are transferred to the non-light-incident side of the light guide plate, and the spraying is carried out using the nozzle of the automatic spraying machine that can move up and down and left and right. The movement stroke of the nozzle is set by the equipment computer, and the fixed stacked light guide plates are transferred to the automatic spraying machine for spraying; Step 4: After transfer, the spray-coated particles are baked and cooled. After spraying, they are transferred to a baking oven for heating to ensure the stability of the spray-coated particles. The baking time is determined by the physical properties of the spray-coated particles. Step 5: Thermal transfer of the light guide plate. The dots are embossed onto the surface of the light guide plate. After baking and cooling, the stacked light guide plate raw materials are taken out from the production device. The light guide plate with the spray-coated surface on the non-light-incident side is hot-pressed through a thermal transfer process. The hot pressing method can be roller hot pressing or other hot pressing methods.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention realizes the correction of the front and rear positions of the stacked light guide plates by setting a right-angle inner groove on the right-angle side frame, and realizes the correction of the left and right positions of the light guide plates by using the right-angle inner groove and the filament driven by the transverse telescopic drive. After the correction, the light guide plates are fixedly clamped by the rotation and pressing of the flap. After fixation, the filament is driven by the lifting and lowering of the filament so that the filament is against the front end of the pressing gap between adjacent light guide plates, so that the gap is blocked by the filament to avoid the penetration of paint and the mutual adhesion of paint. While ensuring that the light guide plates are fully sprayed, the mutual adhesion of the light guide plates is avoided. There is no need to withdraw the filaments used for correction at the spraying end face, which greatly improves the efficiency of correction and shaping and the quality of spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the stacking trolley of the present invention; Figure 2 It is a schematic diagram of the spraying structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the tray of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the flap of the present invention installed on the stacking trolley; Figure 5 It is a schematic diagram of the three-dimensional structure of the stacking trolley of the present invention; Figure 6 It is a schematic diagram of the lateral three-dimensional structure of the stacking trolley of the present invention; Figure 7 This is a schematic diagram of a three-dimensional structure in which a flap of the present invention is fixed on a stacking trolley; Figure 8 for Figure 7 A magnified view of the structure in the middle.

[0018] In the figure: 1. bottom column; 2. conveyor belt; 3. cantilever support plate; 4. diagonal guide brace; 5. stacking trolley; 6. pallet; 7. right-angle side frame; 8. flap; 9. roller; 10. reflow trough; 11. lifting block; 12. nozzle; 13. guide rail; 14. inclined guide plate; 15. side column; 16. first elastic pressure block; 17. column; 18. second elastic pressure block; 19. screw; 20. connecting rod; 21. rotating seat; 22. rotating rod; 23. filament; 24. pull rod; 25. telescopic rod; 26. sleeve block; 27. folding ring; 28. ear seat; 29. ​​longitudinal long groove; 30. end plate; 31. spring; 32. locking nut; 33. crossbeam; 34. screw hole; 35. sleeve. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figures 1 to 8 , the present invention provides a technical solution: Embodiment 1: A production device for improving the brightness of a hot-pressed formed light guide plate, comprising a production device, wherein the production device comprises a stacking trolley 5, which is transported on a conveyor belt 2, and a cantilever support plate 3 is arranged on the conveyor belt 2, and one side of the lower end of the cantilever support plate 3 is fixed by a bottom column 2, a tray 6 for carrying the light guide plate is arranged in the middle of the upper end of the stacking trolley 5, a nozzle 12 driven by a mechanical arm is arranged on one side of the cantilever support plate 3, the cantilever support plate 3 is located directly above the conveyor belt 2, a pair of guide braces 4 are symmetrically arranged on both sides of the cantilever support plate 3, the lower ends of the guide braces 4 are in contact with the upper end surface of the conveyor belt 2, a pair of lifting blocks 11 installed vertically and telescopically are arranged on the upper end of the cantilever support plate 3, and rollers 9 are arranged at the lower end of the stacking trolley 5, and the lifting blocks 11 are against both sides of the rollers 9.

[0021] The stacking trolley 5 is transported by setting a conveyor belt 2, and the stacking trolley 5 is smoothly moved to the cantilever support plate 3 by setting the cooperation of the roller 9 and the guide brace 4. The roller 9 is fixed by the lifting block 11 driven by the lifting, so that the stacking trolley 5 is fixedly installed on the cantilever support plate 3.

[0022] A pair of front-to-rear symmetrical right-angle side frames 7 are provided on one side of the stacking trolley 5, and a right-angle inner groove that limits the end angle of one side of the light guide plate is provided on the inner side of the right-angle side frame 7. A connecting rod 20 is provided on one side of the tray 6. The lower end of the right-angle side frame 7 is slidably inserted on the connecting rod 20, and a spring 31 is sleeved on the connecting rod 20. The spring 31 is pressed between the right-angle side frame 7 and the tray 6, and a locking nut 32 that is threadedly installed and pressed on the outer side wall of the right-angle side frame 7 is provided at the end of the connecting rod 20.

[0023] By setting the connection rod 20, the spring 31, and the locking nut 32, the right-angle side frame 7 is fixedly installed on one side of the tray 6, so that the light guide plates are stacked and placed on the tray 6, and the front and rear positions of the light guide plates are limited by a pair of right-angle inner grooves on the right-angle side frames 7.

[0024] A side column 15 is symmetrically arranged on the other side of the stacking trolley 5. A column 17 driven by a pull rod 24 for transverse extension is arranged on the side wall of the side column 15. A plurality of groups of vertically spaced filaments 23 are arranged between a pair of columns 17 distributed front and back. The filaments 23 are sprayed on the side wall facing the light guide plate.

[0025] By pulling the column 17 with the pull rod 24, the filament 23 is pressed onto the sprayed end face of the light guide plate, thereby achieving lateral extrusion of the light guide plate, so that the other end of the light guide plate is neatly pressed onto the side wall of the right-angle inner groove, thereby achieving shaping of the left and right positions of the light guide plate.

[0026] A flap 8 is rotatably mounted on the upper end of the right-angle side frame 7. A rotating seat 21 is provided at the upper end of the right-angle side frame 7. A rotating rod 22 is provided between a pair of rotating seats 21 that are symmetrical front and back. One end of the flap 8 is rotatably sleeved on the rotating rod 22. A pressing block assembly that is pressed onto the upper end surface of the upper light guide plate is provided at the lower end of the flap 8. A fixing assembly that fixes the flap 8 is provided on the side column 15.

[0027] By pressing the flap 8, the pressing block assembly is pressed onto the uppermost light guide plate, thereby realizing vertical pressing and fixing of the stacked light guide plates. The column 17 is vertically lifted and installed at the end of the pull rod 24. Through the lifting and installation of the column 17, after being fixed, the height of the column 17 is adjusted so that the filament 23 faces the pressing gap between adjacent light guide plates.

[0028] Working principle: First, stack the light guide plates and place them on the pallet 6. Use the right-angled inner groove on the right-angled side frame 7 to limit the front and rear positions of the light guide plates. Pull the column 17 through the pull rod 24 so that the filament 23 is pressed on the sprayed end face of the light guide plate to achieve lateral extrusion of the light guide plate, so that the other end of the light guide plate is neatly pressed on the side wall of the right-angled inner groove to achieve shaping of the left and right positions of the light guide plates. By pressing the flap 8, the pressing block assembly is pressed on the top light guide plate to achieve vertical pressing and fixing of the stacked light guide plates.

[0029] The fixed stacking trolley 5 is placed on the conveyor belt 2, and the stacking trolley 5 is conveyed to the cantilever support plate 3. The stacking trolley 5 is smoothly moved to the cantilever support plate 3 by utilizing the cooperation of the roller 9 and the guide brace 4. The roller 9 is fixed by the lifting block 11 driven by the lifting drive, thereby making the stacking trolley 5 fixedly installed on the cantilever support plate 3.

[0030] Before spraying, the column 17 is installed by lifting and lowering. After it is fixed, the height of the column 17 is adjusted so that the filament 23 is opposite to the pressing gap between adjacent light guide plates. At this time, the position of the nozzle 12 is adjusted by the automatic sprayer to spray the non-light incident side of the light guide plate. The filament 23 is used to block the gap between adjacent light guide plates to prevent the spray paint from filling the gap and avoid paint penetration. After the paint is baked and formed, mutual adhesion of the paint is avoided, ensuring that the light guide plates are fully sprayed while avoiding mutual adhesion of the light guide plates. There is no need to withdraw the filaments used for correction at the spray end face, which greatly improves the efficiency of correction and shaping and the quality of spraying.

[0031] Embodiment 2: Based on Embodiment 1, the lateral width of the tray 6 is smaller than the width of the light guide plate, and a gap is left between the lower end of the tray 6 and the bottom plate of the stacking trolley 5. A downwardly recessed reflow groove 10 is provided on one side of the bottom plate of the stacking trolley 5, and an inclined guide plate 14 is provided at one end of the tray 6, which is inclined downward along the gap to just above the reflow groove 10, and the upper end of the inclined guide plate 14 is opposite to the lower end of the sprayed end face of the light guide plate.

[0032] By setting up the reflux groove 10 and the inclined guide plate 14, the paint dripping after spraying can be recovered to ensure the cleanliness of the stacking trolley. By reserving a gap between the tray 6 and the bottom plate of the stacking trolley 5, the paint can be prevented from being sprayed on the stacking trolley 5.

[0033] A pair of side pillars 15 are respectively attached to the front and rear side walls of the light guide plate, and an ear seat 28 is provided at the upper end of the side pillar 15. The ear seat 28 and the side pillar 15 are both located on the outer side of the light guide plate. A vertically distributed crossbeam 33 is provided at the end of the flap 8. The two ends of the crossbeam 33 are pressed and fixed on the ear seat 28. The ear seat 28 is penetrated with a screw hole 34. The upper end of the ear seat 28 is provided with a circular folding ring 27. The middle inner hole of the folding ring 27 is directly opposite to the screw hole 34. The inner diameter of the middle inner hole of the folding ring 27 is larger than the inner diameter of the screw hole 34. The end of the crossbeam 33 is pressed on the folding ring 27. A sleeve 35 that coincides with the inner hole of the folding ring 27 is arranged on the stacking ring 27 and the cross beam 33, a screw 19 is vertically inserted in the sleeve 35, and the lower end of the screw 19 is threaded and rotatably installed in the screw hole 34, the pressing block assembly includes a first elastic pressing block 16 and a second elastic pressure 18, the first elastic pressing block 16 is set to be conical and pressed on the upper end of the sprayed end of the upper light guide plate, the lower end of the second elastic pressure 18 is pressed on the middle position of the upper end of the upper light guide plate, and the first elastic pressing block 16 and the second elastic pressure 18 are both made of elastic rubber material.

[0034] In order to ensure the fixed pressing strength of the flap 8 on the light guide plate, a folding ring 27 is provided to achieve elastic pressing of the cross beam 33 on the ear seat 28. The folding ring 27 is driven to be squeezed and deformed by the threaded rotation of the screw 19, and the flap 8 is simultaneously driven to be further rotated and pressed down, so that the pressure block assembly is squeezed and deformed, thereby ensuring the squeezing force of the flap 8 on the light guide plate to avoid loosening.

[0035] Example 3: On the basis of Example 2, in order to realize the lateral sliding and lifting installation of the column 17, a vertically extending longitudinal slot 29 is provided on the column 17, and the pull rod 24 is configured as an electric telescopic rod. The end of the pull rod 24 is slidably inserted into the longitudinal slot 29, and an end plate 30 is provided at the end of the pull rod 24. The end plate 30 is pressed on the side wall of the column 17, and the outer diameter of the end plate 30 is larger than the width of the longitudinal slot 29.

[0036] The longitudinal long groove 29 is provided to realize the through insertion of the end of the pull rod 24 on the column 17, and the end plate 30 is used to realize the limiting connection between the pull rod 24 and the column 17, so as to realize the lifting connection of the column 17 at the end of the pull rod 24, and at the same time, the pull rod 24 is used to drive the column 17 to slide horizontally.

[0037] The width between the multiple groups of filaments 23 is equal to the thickness of the light guide plate, and the outer diameter of the filaments 23 is less than 1 / 30 of the thickness of the light guide plate. A guide rail 13 is vertically arranged at the lower end of the side column 15, and a sleeve block 26 slidably connected to the guide rail 13 is arranged at the lower end of the column 17. A telescopic rod 25 for driving the column 17 to rise and fall is vertically arranged at the upper end of the sleeve block 26.

[0038] By setting the cooperation of the guide rail 13 and the sleeve block 26, the lower end of the column 17 is limited to ensure the smooth lateral sliding of the column 17, and the telescopic rod 25 is used to realize the lifting and lowering drive of the column 17, thereby limiting the thickness of the filament 23 to avoid the filament blocking the side wall of the light guide plate and causing uneven spraying.

[0039] A method for improving the brightness of a hot-pressed light guide plate, the method comprising the following steps: Step 1: The polished light guide plate raw material is stacked and fixed in the stacking operation to enhance the brightness of the hot-pressed light guide plate production equipment, the stacking trolley 5 is used to carry the stacked light guide plates, the right-angle side frame 7, the side column 15, the column 17 and the filament 23 are used to realize the shaping of the stacked light guide plates, and the flap 8 is used to realize the clamping and fixing of the light guide plates, so that the stacked light guide plates are kept tightly pressed, and it is ensured that there is no obvious gap between the stacked light guide plates; Step 2: Customize and select the raw materials for plastic spraying particles. Choose silver or white plastic spraying particles, and the material must meet the RoHS standard; Step 3: The plastic particles are transferred to the non-light-incident side of the light guide plate, and the spraying is performed using a nozzle 12 that can move up and down and left and right on the automatic spraying machine. The movement stroke of the nozzle 12 is set by the equipment computer, and the fixed stacked light guide plates are transferred to the automatic spraying machine for spraying; Step 4: After transfer, the spray-coated particles are baked and cooled. After spraying, they are transferred to a baking oven for heating to ensure the stability of the spray-coated particles. The baking time is determined by the physical properties of the spray-coated particles. Step 5: Thermal transfer of the light guide plate. The dots are embossed onto the surface of the light guide plate. After baking and cooling, the stacked light guide plate raw materials are taken out from the production device. The light guide plate with the spray-coated surface on the non-light-incident side is hot-pressed through a thermal transfer process. The hot pressing method can be roller hot pressing or other hot pressing methods.

[0040] 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. A manufacturing device for improving the brightness of a hot-pressed light guide plate, comprising a manufacturing device, wherein the manufacturing device comprises a stacking trolley (5), the stacking trolley (5) is transported on a conveyor belt (2), a cantilever support plate (3) is arranged on the conveyor belt (2), one side of the lower end of the cantilever support plate (3) is fixed by a bottom column (2), a tray (6) for carrying the light guide plate is arranged in the middle of the upper end of the stacking trolley (5), one side of the cantilever support plate (3) is arranged with a nozzle (12) driven by a mechanical arm, and the characteristics are: A pair of front-to-back symmetrical right-angle side frames (7) are provided on one side of the stacking trolley (5), a right-angle inner groove defining an end angle of one side of the light guide plate is provided on the inner side of the right-angle side frame (7), a flap (8) is rotatably mounted on the upper end of the right-angle side frame (7), a pressing block assembly pressed onto the upper end surface of the upper light guide plate is provided at the lower end of the flap (8), a side column (15) is symmetrically arranged on the other side of the stacking trolley (5), a fixing assembly for fixing the flap (8) is provided on the side column (15), a column (17) driven to extend and retract laterally by a pull rod (24) is provided on the side wall of the side column (15), a plurality of groups of vertically spaced filaments (23) are provided between the pair of front-to-back distributed filaments (17), the filaments (23) are sprayed on the side wall of the light guide plate on one side, and the column (17) is vertically lifted and lowered and mounted on the end of the pull rod (24).

2. The device for improving the brightness of a hot-pressed light guide plate according to claim 1, characterized in that: The cantilever support plate (3) is located directly above the conveyor belt (2), a pair of diagonal guide braces (4) are symmetrically arranged on both sides of the cantilever support plate (3), the lower ends of the diagonal guide braces (4) are in contact with the upper end surface of the conveyor belt (2), a pair of lifting blocks (11) are arranged at the upper end of the cantilever support plate (3) and are vertically telescopically mounted, a roller (9) is arranged at the lower end of the stacking trolley (5), and the lifting blocks (11) are against both sides of the roller (9).

3. The device for improving the brightness of a hot-pressed light guide plate according to claim 2, characterized in that: The lateral width of the tray (6) is smaller than the width of the light guide plate, a gap is left between the lower end of the tray (6) and the bottom plate of the stacking trolley (5), a downwardly recessed reflow groove (10) is provided on one side of the bottom plate of the stacking trolley (5), and an inclined guide plate (14) is provided at one end of the tray (6) and is inclined downward along the gap to just above the reflow groove (10), the upper end of the inclined guide plate (14) being directly opposite to the lower end of the sprayed end surface of the light guide plate.

4. The device for improving the brightness of a hot-pressed light guide plate according to claim 3, characterized in that: A connecting rod (20) is provided on one side of the tray (6), the lower end of the right-angle side frame (7) is slidably inserted on the connecting rod (20), a spring (31) is sleeved on the connecting rod (20), the spring (31) is pressed between the right-angle side frame (7) and the tray (6), the end of the connecting rod (20) is provided with a locking nut (32) which is threadedly installed and pressed on the outer side wall of the right-angle side frame (7), the upper end of the right-angle side frame (7) is provided with a rotating seat (21), a rotating rod (22) is provided between a pair of rotating seats (21) symmetrically arranged front and rear, and one end of the flap (8) is rotatably sleeved on the rotating rod (22).

5. The device for improving the brightness of a hot-pressed light guide plate according to claim 4, characterized in that: A pair of side columns (15) are respectively fitted to the front and rear side walls of the light guide plate; an ear seat (28) is provided at the upper end of the side column (15); the ear seat (28) and the side column (15) are both located outside the light guide plate; a vertically distributed cross beam (33) is provided at the end of the flap (8); both ends of the cross beam (33) are pressed and fixed on the ear seat (28).

6. The device for improving the brightness of a hot-pressed light guide plate according to claim 5, characterized in that: The ear seat (28) is provided with a screw hole (34) extending therethrough. The upper end of the ear seat (28) is provided with a circular folding ring (27). The middle inner hole of the folding ring (27) faces the screw hole (34). The inner diameter of the middle inner hole of the folding ring (27) is larger than the inner diameter of the screw hole (34). The end of the crossbeam (33) is pressed onto the folding ring (27). The crossbeam (33) is provided with a sleeve (35) which overlaps with the inner hole of the folding ring (27). A screw rod (19) is vertically inserted into the sleeve (35). The lower end of the screw rod (19) is threadedly rotatably installed in the screw hole (34).

7. The device for improving the brightness of a hot-pressed light guide plate according to claim 1, characterized in that: The column (17) is provided with a vertically extending longitudinal slot (29), the pull rod (24) is provided as an electric telescopic rod, the end of the pull rod (24) is slidably inserted into the longitudinal slot (29), and the end of the pull rod (24) is provided with an end plate (30), the end plate (30) is pressed onto the side wall of the column (17), and the outer diameter of the end plate (30) is greater than the width of the longitudinal slot (29).

8. The device for improving the brightness of a hot-pressed light guide plate according to claim 7, characterized in that: The width between the plurality of groups of filaments (23) is equal to the thickness of the light guide plate, and the outer diameter of the filaments (23) is less than 1 / 30 of the thickness of the light guide plate. A guide rail (13) is vertically arranged at the lower end of the side column (15), a sleeve block (26) slidably sleeved on the guide rail (13) is arranged at the lower end of the column (17), and a telescopic rod (25) for driving the column (17) to rise and fall is vertically arranged at the upper end of the sleeve block (26).

9. The device for improving the brightness of a hot-pressed light guide plate according to claim 6, characterized in that: The pressing block assembly comprises a first elastic pressing block (16) and a second elastic pressing block (18); the first elastic pressing block (16) is arranged in a conical shape and is pressed onto the upper end of the sprayed end of the upper light guide plate; the lower end of the second elastic pressing block (18) is pressed onto the middle position of the upper end of the upper light guide plate; the first elastic pressing block (16) and the second elastic pressing block (18) are both made of elastic rubber material.

10. A method for improving the brightness of a hot-pressed light guide plate, characterized in that: The production method comprises the following steps: Step 1: The polished light guide plate raw material is stacked and fixed in the device for improving the brightness of the hot-pressed light guide plate manufacturing according to any one of claims 1 to 9, ensuring that there is no obvious gap between the stacked light guide plates; Step 2: Customize and select the raw materials for plastic spraying particles. Choose silver or white plastic spraying particles, and the material must meet the RoHS standard; Step 3: The plastic particles are transferred to the non-light-incident side of the light guide plate, and the spraying is carried out using the nozzle of the automatic spraying machine that can move up and down and left and right. The movement stroke of the nozzle is set by the equipment computer, and the fixed stacked light guide plates are transferred to the automatic spraying machine for spraying; Step 4: After transfer, the spray-coated particles are baked and cooled. After spraying, they are transferred to a baking oven for heating to ensure the stability of the spray-coated particles. The baking time is determined by the physical properties of the spray-coated particles. Step 5: Thermal transfer of the light guide plate. The dots are embossed onto the surface of the light guide plate. After baking and cooling, the stacked light guide plate raw materials are taken out from the production device. The light guide plate with the plastic sprayed surface on the non-light incident side is hot pressed through a thermal transfer process. The hot pressing method can be roller hot pressing or other hot pressing methods.

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