Anti-yellowing pre-coating veneer processing device and processing technology

Abstract

The invention relates to the field of wood processing, in particular to an anti-yellowing pre-coating veneer processing device which comprises a workbench, a conveying mechanism is installed on the upper surface of the workbench, veneers are conveyed on the conveying mechanism from left to right, a rack is installed on the left side of the top of the workbench, and two lifters are installed on the upper surface of the rack; and a polishing mechanism is installed at the output end of the lifter, when the lifter drives the polishing mechanism to descend, the polishing mechanism polishes the surface of the veneer, and a dust suction hood is horizontally installed at the top of the conveying mechanism. The problem that the polishing direction cannot be adjusted according to the direction of wood grains is thoroughly solved, the situation that burrs are generated on the surface of the polished wood veneer is effectively avoided, the surface flatness and appearance quality of the wood veneer are guaranteed, the qualified rate of wood veneer products is greatly improved, the purpose of self-cleaning of abrasive paper is achieved, the surface roughness of the abrasive paper is effectively restored, and the production efficiency is improved. And the problems that the follow-up grinding efficiency is reduced and the grinding effect becomes poor due to the fact that the abrasive paper accumulates the scraps are solved.

Description

Technical Field

[0001] This invention relates to the field of wood processing technology, specifically to a pre-coated wood veneer processing device and processing technology that is resistant to yellowing. Background Technology

[0002] Wood veneer, also known as thin wood, is a thin wood material made by peeling, slicing, or rotary cutting natural or artificial wood through specific processing techniques. Its thickness is usually between 0.1-2mm. This material not only fully retains the natural texture, color, and other natural qualities of wood, but also achieves efficient use of wood resources and effectively reduces wood waste. Therefore, it has become an indispensable core decorative and structural material in furniture manufacturing, interior decoration, musical instrument making, and other fields, with wide application and stable demand in related industries.

[0003] In the wood veneer processing, the veneer blank, as the decorative surface of the final product, needs to be sanded and polished to ensure a smooth and flat surface that meets the quality requirements for subsequent processing or direct use. To further improve the utilization rate of wood resources and maximize wood veneer production, in actual production, two different types of products are processed according to the direction of the wood grain: cross-grain veneer and longitudinal-grain veneer.

[0004] However, existing sanders have significant technical defects when sanding the two types of wood veneers mentioned above: On the one hand, existing sanders do not have the function of adjusting the sanding direction according to the wood grain direction, and cannot achieve precise sanding along the wood grain direction, which makes the surface of the wood veneer prone to burrs after sanding, seriously affecting the surface flatness and appearance quality of the wood veneer, and thus reducing the product qualification rate; on the other hand, during the sanding process, some of the wood chips produced by grinding the wood veneer will adhere to the surface of the sandpaper and the surface of the wood veneer. Not only are they difficult to clean, but they will also cause a significant decrease in the surface roughness of the sandpaper, which will reduce the subsequent sanding efficiency and the sanding effect, requiring frequent replacement of sandpaper, increasing production costs and processing time. Summary of the Invention

[0005] The purpose of this invention is to provide a yellowing-resistant pre-coated wood veneer processing device and processing technology to solve the problems mentioned in the background art, such as the inability to sand in the direction of the wood grain, the difficulty of removing impurities with sandpaper, and the impact on the polishing effect of the wood veneer.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions: A pre-coated wood veneer processing device resistant to yellowing includes a workbench with a conveying mechanism mounted on its upper surface. Wood veneer is conveyed from left to right on the conveying mechanism. A frame is mounted on the top left side of the workbench, and two lifters are mounted on the upper surface of the frame. A sanding mechanism is mounted on the output end of each lifter. When the lifters drive the sanding mechanism to descend, the sanding mechanism sands the surface of the wood veneer. A dust collection hood is horizontally mounted on the top of the conveying mechanism. The dust collection hood is connected to a dust collection fan through a dust collection pipe. Under the suction of the dust collection fan, the dust collection hood removes impurities from the surface of the wood veneer. A spraying mechanism is mounted on the top right end of the conveying mechanism to evenly spray paint onto the surface of the wood veneer. After film formation, the anti-corrosion properties of the wood veneer are improved. The conveying mechanism includes a base mounted on the upper surface of the workbench. Rollers are equidistantly mounted from left to right in the inner cavity of the base via bearings. A conveyor belt is sleeved on the outer wall of the rollers. A first motor is mounted on the outer wall of the base. The rollers rotate under the drive of the first motor. The rolling of the rollers moves the conveyor belt, realizing the conveying of wood veneer from left to right. Several pressure-applying components are equidistantly mounted from left to right on the top of the base.

[0007] As a further embodiment of the present invention, the pressure application component includes two limiting posts that are vertically installed on the top of the base and symmetrically positioned front and back. The upper and lower ends of the inner cavity of the limiting posts are respectively inserted with a first spring and a slider. A conveying roller is installed on the inner side of the slider through a bearing. Under the action of the elastic force of the first spring and the gravity of the conveying roller itself, the conveying roller applies pressure to the wood veneer, ensuring that the wood veneer moves smoothly during the sanding process.

[0008] As a further embodiment of the present invention, the grinding mechanism includes a top plate installed at the output end of the lifting device. A second motor is installed at the center of the upper surface of the top plate. A traction component is installed at the output end of the second motor. The second motor drives the traction component to rotate in 90-degree rotation units to change the direction of movement of the traction component. A positioning component is installed on the lower surface of the traction component. A vibration component is installed on the rear side of the traction component. Change the sanding direction and sand in the direction of the wood grain to prevent burrs from forming.

[0009] As a further embodiment of the present invention, the traction assembly includes a first housing installed at the output end of the second motor. A drive unit is installed on the front of the first housing. Two left-right opposing slide rods are horizontally installed at the bottom of the inner cavity of the first housing. A slide seat is sleeved on the outer wall of the slide rod. The positioning assembly can move horizontally and linearly by the cooperation of the slide rod and the slide seat. A roller is installed at the center of the upper surface of the slide seat.

[0010] As a further embodiment of the present invention, the drive unit includes a third motor installed on the top front of the first housing. The output end of the third motor is locked to a first rotating shaft via a coupling. A rotating cylinder is installed on the outer wall of the first rotating shaft. The third motor serves as the power source for the rotating cylinder and the vibration assembly. A guide groove is provided on the outer wall of the rotating cylinder, and a roller is inserted into the inner cavity of the guide groove. Adjust the direction of the slide block to allow the sandpaper to rub the wood veneer back and forth, providing power for polishing the wood veneer.

[0011] As a further embodiment of the present invention, the guide grooves are distributed in a wave-like pattern on the outer wall of the rotating cylinder.

[0012] As a further embodiment of the present invention, the positioning component includes a mounting base mounted on the lower surface of the slide by a pin. The mounting base is hollow, and a positioning bolt is screwed to the top of the inner wall of the mounting base. When the positioning bolt is screwed to the slide, the mounting base is positioned. Clips are installed on both the left and right sides of the mounting base, and sandpaper is laid on the lower surface of the mounting base. The clips are used to hold and position the sandpaper. The sandpaper can be clamped in place to replace consumables.

[0013] As a further embodiment of the present invention, the vibration assembly includes a second housing installed on the rear side of the first housing. A second rotating shaft is installed on the left side of the inner cavity of the second housing via a bearing, and the second rotating shaft is locked to the first rotating shaft via a coupling. A first gear is keyed to the outer wall of the second rotating shaft. A slide is provided on the right side wall of the second housing. A swing unit is installed on the right side of the inner cavity of the second housing. The first housing vibrates by performing centrifugal swing through the swing unit.

[0014] As a further embodiment of the present invention, the swing unit includes a splined shaft mounted on the right side of the inner cavity of the second box via a bearing. A bushing capable of sliding back and forth is sleeved on the front end of the outer wall of the splined shaft. A second gear meshing with a first gear is keyed to the front end of the outer wall of the bushing. A push-pull rod penetrating a slide rail is sleeved on the rear side of the outer wall of the bushing. Moving the push-pull rod can pull the bushing to slide back and forth on the outer wall of the splined shaft. A swing block is installed at the rear end of the splined shaft. The swing block rotates around the splined shaft. A sleeve is installed at the top of the inner cavity of the second box via a pin. A second spring and a telescopic rod are sequentially inserted into the inner cavity of the sleeve from top to bottom. The second spring applies pressure to the telescopic rod. The bottom end of the telescopic rod is connected to the top of the push-pull rod via a pin. The purpose is to allow the second gear to mesh with and disengage from the first gear. When meshing, sandpaper is used to remove impurities, and when disengaging, sandpaper is used to polish the wood veneer.

[0015] The processing technology of the pre-coated wood veneer processing device resistant to yellowing includes the following steps: Step 1: The first motor drives the roller to rotate clockwise, the conveyor belt provides the conveying power from left to right, the first spring presses down the slider, and the conveyor roller presses the wood veneer firmly onto the conveyor belt, so that the wood veneer is conveyed smoothly from left to right; Step 2: The lifting device drives the traction component to descend until the sandpaper contacts the wood veneer. The third motor drives the first rotating shaft and the rotating drum to rotate. Due to the different inclination directions on both sides of the guide groove, the inclined surface of the guide groove alternately presses the roller forward and backward, thereby causing the slide to move back and forth. The sandpaper moves back and forth to rub the wood veneer, achieving the sanding and polishing of the horizontal wood veneer. When sanding wood veneer with the grain, unscrew the positioning bolts from the slide block. Driven by the second motor, the first box rotates 90 degrees, changing the direction of the slide block's movement. Then, screw the positioning bolts back into the slide block to achieve the reciprocating motion of the sandpaper, which sands the wood veneer with the grain. Step 3: Move the push-pull rod back and forth to cause the bushing to move back and forth along the spline shaft. The second gear engages or disengages from the first gear. As the push-pull rod moves back and forth, the sleeve tilts forward or backward. The second spring force pushes the telescopic rod to move in the tilting direction, which positions the push-pull rod. When the first gear and the second gear are in operation, the spline shaft drives the swing block to rotate centrifugally. The center of gravity of the swing block does not coincide with the center of rotation of the spline shaft. The periodically changing centrifugal force causes the spline shaft to vibrate. Under the condition of solid energy transmission, the sandpaper vibrates. As the sandpaper swings continuously, the wood chips accumulated on the surface of the sandpaper are shaken off, so that the surface roughness of the sandpaper can always meet the sanding requirements. Step four: After polishing, the dust hood removes impurities from the wood veneer surface. The solenoid valve controls the number of openings based on the width of the wood veneer. The nozzle sprays paint evenly onto the wood veneer surface. After curing, a protective layer is formed on the wood veneer surface to prevent discoloration and corrosion.

[0016] Compared with the prior art, the beneficial effects of the embodiments of the present invention are: 1. This invention uses a third motor to power a rotating drum. The wavy guide groove on the outer wall of the drum, in conjunction with the rollers on the slide block, drives the slide block to reciprocate along the slide rod, causing the sandpaper below the slide block to move synchronously back and forth, achieving sanding of cross-grain veneer in the same direction. Simultaneously, a second motor drives the first housing to rotate in 90-degree units, changing the direction of the slide block's reciprocating movement and switching the sandpaper to left-right reciprocating movement. This adapts to the sanding requirements of parallel-grain veneer, completely solving the problem of not being able to adjust the sanding direction according to the wood grain direction. It effectively avoids burrs on the veneer surface after sanding, ensuring the surface flatness and appearance quality of the veneer, and significantly improving the pass rate of veneer products.

[0017] 2. This invention, by moving the push-pull rod back and forth, can pull the bushing to slide back and forth along the spline shaft. Combined with the elastic force of the second spring on the telescopic rod, it can stably achieve the engagement or disengagement of the second gear and the first gear. When the two gears are engaged, the spline shaft drives the rear swing block to perform centrifugal rotation. Because the center of gravity of the swing block does not coincide with the rotation center of the spline shaft, the periodically changing centrifugal force causes the spline shaft to vibrate. This vibration is transmitted to the mounting base and sandpaper through solid energy, causing the sandpaper to vibrate while sliding back and forth. Under the dual drive of sandpaper vibration and reciprocating sliding, the accumulated sawdust on the sandpaper surface can be efficiently shaken off, achieving the purpose of sandpaper self-cleaning, effectively restoring the surface roughness of the sandpaper, and avoiding the problems of reduced subsequent sanding efficiency and poor sanding effect caused by sandpaper dust accumulation. At the same time, it eliminates the need for frequent sandpaper replacement, reducing the consumption of sandpaper consumables, lowering production costs, and saving time spent replacing sandpaper, further improving the overall processing efficiency of wood veneer. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the pressure application component structure of the present invention; Figure 3 This is a schematic diagram of the grinding mechanism of the present invention; Figure 4 This is an exploded view of the grinding mechanism of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the vibration component structure of the present invention; Figure 7 This is an exploded view of the vibration component of the present invention; Figure 8 This is a schematic diagram of the spraying mechanism of the present invention.

[0019] In the diagram: 1. Workbench; 2. Conveying mechanism; 3. Frame; 4. Lifter; 5. Grinding mechanism; 6. Dust hood; 7. Spraying mechanism; 21. Base; 22. Roller; 23. Conveyor belt; 24. First motor; 25. Pressure application assembly; 251. Limiting post; 252. First spring; 253. Slider; 254. Conveying roller; 51. Top plate; 52. Second motor; 53. Traction assembly; 54. Positioning assembly; 55. Vibration assembly; 531. First housing; 532. Drive unit; 533. Slide rod; 534. Slide seat; 535. Roller; 5321. Third motor; 5322, First rotating shaft; 5323, Rotary drum; 5324, Guide groove; 541, Mounting base; 542, Positioning bolt; 543, Clamp; 544, Sandpaper; 551, Second housing; 552, Second rotating shaft; 553, First gear; 554, Slide rail; 555, Swing unit; 5551, Splined shaft; 5552, Bushing; 5553, Second gear; 5554, Push-pull rod; 5555, Swing block; 5556, Sleeve; 5557, Second spring; 5558, Telescopic rod; 71, Bracket; 72, Solenoid valve; 73, Nozzle. Detailed Implementation

[0020] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] Please see Figure 1-8 In this embodiment of the invention, a pre-coated wood veneer processing device for yellowing resistance includes a workbench 1, a conveying mechanism 2 installed on the upper surface of the workbench 1, on which the wood veneer is conveyed from left to right. A frame 3 is installed on the top left side of the workbench 1, and two lifting devices 4 are installed on the upper surface of the frame 3. A sanding mechanism 5 is installed at the output end of the lifting device 4. When the lifting device 4 drives the sanding mechanism 5 to descend, the sanding mechanism 5 sands the surface of the wood veneer. A dust collection hood 6 is horizontally installed on the top of the conveying mechanism 2. The dust collection hood 6 is connected to a dust collection fan through a dust collection pipe. Under the suction of the dust collection fan, the dust collection hood 6 sucks away impurities from the surface of the wood veneer. A spraying mechanism 7 is installed on the top right end of the conveying mechanism 2 to evenly spray paint onto the surface of the wood veneer. After the film is formed, the corrosion resistance of the wood veneer is improved. The conveying mechanism 2 includes a base 21 mounted on the upper surface of the workbench 1. Rollers 22 are equidistantly mounted from left to right in the inner cavity of the base 21 via bearings. A conveyor belt 23 is sleeved on the outer wall of the rollers 22. The rollers 22 provide multi-point support for the conveyor belt 23, keeping the veneer horizontal on the conveyor belt 23 and preventing uneven sanding. A first motor 24 is mounted on the outer wall of the base 21. Driven by the first motor 24, the rollers 22 rotate. The rolling of the rollers 22 moves the conveyor belt 23, realizing the conveying of the veneer from left to right. Several pressure-applying components 25 are equidistantly mounted from left to right on the top of the base 21.

[0023] Furthermore, the pressure application component 25 includes two limiting posts 251 that are vertically installed on the top of the base 21 and symmetrically arranged front and back. The upper and lower ends of the inner cavity of the limiting post 251 are respectively inserted with a first spring 252 and a slider 253. The slider 253 is dovetail-shaped to improve the stability of the slider 253 movement. A conveying roller 254 is installed on the inner side of the slider 253 through a bearing. Under the action of the elastic force of the first spring 252 and the weight of the conveying roller 254 itself, the conveying roller 254 applies pressure to the wood veneer to ensure that the wood veneer moves smoothly during the sanding process. Wood veneer conveying: The first motor 24 drives the roller 22 to rotate clockwise, the conveyor belt 23 provides conveying power from left to right, the first spring 252 presses down the slider 253, and the conveyor roller 254 presses the wood veneer tightly onto the conveyor belt 23, allowing the wood veneer to move smoothly from left to right.

[0024] Furthermore, the grinding mechanism 5 includes a top plate 51 installed at the output end of the lifting device 4. A second motor 52 is installed at the center of the upper surface of the top plate 51. A traction component 53 is installed at the output end of the second motor 52. The second motor 52 drives the traction component 53 to rotate in 90-degree units, changing the direction of movement of the traction component 53. A positioning component 54 is installed on the lower surface of the traction component 53. A vibration component 55 is installed on the rear side of the traction component 53.

[0025] Furthermore, the traction assembly 53 includes a first housing 531 installed at the output end of the second motor 52. A drive unit 532 is installed on the front of the first housing 531. Two left-right opposing slide rods 533 are horizontally installed at the bottom of the inner cavity of the first housing 531. A slide seat 534 is sleeved on the outer wall of the slide rod 533. The positioning assembly 54 can move horizontally and linearly by the cooperation of the slide rod 533 and the slide seat 534. A roller 535 is installed at the center of the upper surface of the slide seat 534.

[0026] Furthermore, the drive unit 532 includes a third motor 5321 mounted on the top front of the first housing 531. The output end of the third motor 5321 is locked to a first rotating shaft 5322 via a coupling. A rotating cylinder 5323 is mounted on the outer wall of the first rotating shaft 5322. The third motor 5321 serves as the power source for the rotating cylinder 5323 and the vibration assembly 55. A guide groove 5324 is provided on the outer wall of the rotating cylinder 5323, and a roller 535 is inserted into the inner cavity of the guide groove 5324. The roller 535 reduces the friction with the guide groove 5324 by rolling itself, resulting in better compatibility between the roller 5324 and the guide groove 5324. The guide groove 5324 is distributed in a wave-like pattern on the outer wall of the rotating cylinder 5323. When the rotating cylinder 5323 rotates, due to the different inclination directions on both sides of the guide groove 5324, one side of the guide groove 5324 can press the roller 535 forward, while the other side presses the roller 535 backward, thereby causing the slide 534 to swing back and forth. Wood veneer sanding: The lifting device 4 drives the traction component 53 to descend until the sandpaper 544 contacts the wood veneer. The third motor 5321 drives the first rotating shaft 5322 and the rotating drum 5323 to rotate. Due to the different inclination directions on both sides of the guide groove 5324, the inclined surface of the guide groove 5324 alternately presses the roller 535 forward and backward, thereby causing the slide 534 to move back and forth. The sandpaper 544 moves back and forth to rub the wood veneer, achieving horizontal wood veneer sanding and polishing. When sanding wood veneer along the grain, the positioning bolt 542 is unscrewed from the slide block 534. Driven by the second motor 52, the first box 531 rotates 90 degrees, changing the direction of movement of the slide block 534. Then, the positioning bolt 542 is screwed back into the slide block 534, realizing the reciprocating motion of the sandpaper 544 to sand the wood veneer along the grain.

[0027] Furthermore, the positioning component 54 includes a mounting base 541 mounted on the lower surface of the slide block 534 via a pin. The mounting base 541 is hollow, and a positioning bolt 542 is screwed onto the top of the inner wall of the mounting base 541. When the positioning bolt 542 is screwed onto the slide block 534, it positions the mounting base 541. Clips 543 are installed on both the left and right sides of the mounting base 541. Sandpaper 544 is laid on the lower surface of the mounting base 541. The clips 543 are used to clamp and position the sandpaper 544. The mounting base 541 presses the sandpaper 544 flat onto the wood veneer, and the sandpaper 544 can fully sand the wood veneer.

[0028] Furthermore, the vibration assembly 55 includes a second housing 551 installed on the rear side of the first housing 531. A second rotating shaft 552 is installed on the left side of the inner cavity of the second housing 551 via a bearing, and the second rotating shaft 552 is locked to the first rotating shaft 5322 via a coupling. A first gear 553 is keyed to the outer wall of the second rotating shaft 552. A slide rail 554 is provided on the right side wall of the second housing 551. The slide rail 554 restricts the movement distance of the push-pull rod 5554 and serves as a positioning function for the first gear 553. A swing unit 555 is installed on the right side of the inner cavity of the second housing 551. The first housing 531 vibrates by performing centrifugal swing through the swing unit 555.

[0029] Furthermore, the swing unit 555 includes a splined shaft 5551 mounted on the right side of the inner cavity of the second housing 551 via bearings. A bushing 5552, capable of sliding back and forth, is sleeved on the front end of the outer wall of the splined shaft 5551. A second gear 5553, meshing with the first gear 553, is keyed to the front end of the outer wall of the bushing 5552. The gear ratio between the first gear 553 and the second gear 5553 is greater than 1, increasing the rotational speed of the swing block 5555 and thus increasing the vibration intensity. A push-pull rod 5554, penetrating a slide rail 554, is sleeved on the rear side of the outer wall of the bushing 5552. Moving the push-pull rod 5554 can pull the bushing 5552 to slide back and forth on the outer wall of the splined shaft 5551, realizing the engagement and disengagement of the second gear 5553 with the first gear 553. A swing block 5555 is mounted on the rear end of the splined shaft 5551. The swing block 5555 is positioned relative to the splined shaft 5551. The swing block 5555 rotates around the center of the spline shaft 5551. The center of rotation of the swing block 5555 is not on the same straight line as the center of gravity of the spline shaft 5551. As the centrifugal force of the swing block 555 changes periodically, the spline shaft 5551 vibrates, and then the mounting base 541 vibrates under the energy transmission. The top of the inner cavity of the second box 551 is equipped with a sleeve 5556 through a pin. The top of the sleeve 5556 is on the same straight line as the center of the slide rail 554. When the push-pull rod 5554 moves back and forth, the sleeve 5556 can be tilted forward or backward, so that the telescopic rod 5558 can provide assistance for the movement of the push-pull rod 5554. The inner cavity of the sleeve 5556 is connected to the second spring 5557 and the telescopic rod 5558 from top to bottom. The elastic force of the second spring 5557 is used to apply pressure to the telescopic rod 5558. The bottom end of the telescopic rod 5558 is connected to the top of the push-pull rod 5554 through a pin. Sandpaper 544 removes impurities: Pushing and pulling rod 5554 back and forth causes bushing 5552 to move back and forth along spline shaft 5551. The second gear 5553 engages or disengages from the first gear 553. As push and pull rod 5554 moves back and forth, sleeve 5556 tilts forward or backward. The second spring 5557 pushes telescopic rod 5558 to move in the tilting direction, which positions push and pull rod 5554. When the first gear 553 and the second gear 5553 are in operation, spline shaft 5551 drives swing block 5555 to perform centrifugal rotation. The center of gravity of swing block 5555 does not coincide with the center of rotation of spline shaft 5551. The periodically changing centrifugal force causes spline shaft 5551 to vibrate. Under the condition of solid energy transmission, sandpaper 544 vibrates. As sandpaper 544 oscillates continuously, the sawdust accumulated on the surface of sandpaper 544 is shaken off, so that the surface roughness of sandpaper 544 can always meet the sanding requirements.

[0030] Furthermore, the spraying mechanism 7 includes a bracket 71 installed on the right end of the upper surface of the base 21. Solenoid valves 72 are installed at equal intervals from front to back on the upper surface of the bracket 71. The solenoid valves 72 are connected to the spraying machine through pipes. A nozzle 73 is installed at the bottom of the solenoid valves 72. Paint is sprayed downwards using the nozzles 73 to achieve wood veneer coating. Painting: The dust hood 6 removes impurities from the wood veneer surface, the solenoid valve 72 controls the number of openings according to the width of the wood veneer, and the nozzle 73 sprays paint evenly onto the wood veneer surface. After curing, a protective layer is formed on the wood veneer surface to prevent discoloration and corrosion.

[0031] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these should also be considered within the scope of protection of the present invention. These will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A pre-coated wood veneer processing device resistant to yellowing, comprising a workbench (1), characterized in that, The workbench (1) is equipped with a conveying mechanism (2) on its upper surface. The wood veneer is conveyed from left to right on the conveying mechanism (2). A frame (3) is installed on the top left side of the workbench (1). Two lifters (4) are installed on the upper surface of the frame (3). A sanding mechanism (5) is installed at the output end of the lifter (4). When the lifter (4) drives the sanding mechanism (5) to descend, the sanding mechanism (5) sands the surface of the wood veneer. A dust hood (6) is installed horizontally on the top of the conveying mechanism (2). The dust hood (6) is connected to the dust collector through a dust collection pipe. Under the suction of the dust collector, the dust hood (6) sucks away impurities from the surface of the wood veneer. A spraying mechanism (7) is installed on the top right end of the conveying mechanism (2). The paint is sprayed evenly onto the surface of the wood veneer. After the film is formed, the anti-corrosion properties of the wood veneer are improved. The conveying mechanism (2) includes a base (21) installed on the upper surface of the workbench (1). Rollers (22) are installed equidistantly from left to right in the inner cavity of the base (21) via bearings. A conveyor belt (23) is sleeved on the outer wall of the roller (22). A first motor (24) is installed on the outer wall of the base (21). The roller (22) is rotated under the drive of the first motor (24). The roller (22) can move the conveyor belt (23) by rolling, so as to realize the conveying of wood veneer from left to right. Several pressure components (25) are installed equidistantly from left to right on the top of the base (21).

2. The yellowing-resistant pre-coated wood veneer processing device according to claim 1, characterized in that, The pressure application component (25) includes two limiting posts (251) that are vertically installed on the top of the base (21) and symmetrically arranged front and back. The upper and lower ends of the inner cavity of the limiting post (251) are respectively connected to a first spring (252) and a slider (253). The inner side of the slider (253) is equipped with a conveying roller (254) through a bearing. Under the action of the elastic force of the first spring (252) and the weight of the conveying roller (254), the conveying roller (254) applies pressure to the wood veneer to ensure that the wood veneer moves smoothly during the sanding process.

3. The yellowing-resistant pre-coated wood veneer processing device according to claim 2, characterized in that, The grinding mechanism (5) includes a top plate (51) installed at the output end of the lifting device (4). A second motor (52) is installed at the center of the upper surface of the top plate (51). A traction component (53) is installed at the output end of the second motor (52). The second motor (52) drives the traction component (53) to rotate in 90-degree units, changing the direction of movement of the traction component (53). A positioning component (54) is installed on the lower surface of the traction component (53). A vibration component (55) is installed on the rear side of the traction component (53).

4. The yellowing-resistant pre-coated wood veneer processing device according to claim 3, characterized in that, The traction assembly (53) includes a first housing (531) installed at the output end of the second motor (52). A drive unit (532) is installed on the front of the first housing (531). Two left-right opposing slide rods (533) are horizontally installed at the bottom of the inner cavity of the first housing (531). A slide seat (534) is sleeved on the outer wall of the slide rod (533). The positioning assembly (54) can move horizontally and linearly by the cooperation of the slide rod (533) and the slide seat (534). A roller (535) is installed at the center of the upper surface of the slide seat (534).

5. The yellowing-resistant pre-coated wood veneer processing apparatus according to claim 4, characterized in that, The drive unit (532) includes a third motor (5321) installed on the top front of the first housing (531). The output end of the third motor (5321) is locked with a first rotating shaft (5322) via a coupling. A rotating cylinder (5323) is installed on the outer wall of the first rotating shaft (5322). The third motor (5321) serves as the power source for the rotating cylinder (5323) and the vibration assembly (55). A guide groove (5324) is provided on the outer wall of the rotating cylinder (5323), and a roller (535) is inserted into the inner cavity of the guide groove (5324).

6. The yellowing-resistant pre-coated wood veneer processing apparatus according to claim 5, characterized in that, The guide groove (5324) is distributed in a wave-like pattern on the outer wall of the rotating cylinder (5323).

7. The yellowing-resistant pre-coated wood veneer processing apparatus according to claim 6, characterized in that, The positioning component (54) includes a mounting base (541) mounted on the lower surface of the slide (534) via a pin. The mounting base (541) is hollow. A positioning bolt (542) is screwed to the top of the inner wall of the mounting base (541). When the positioning bolt (542) is screwed to the slide (534), the mounting base (541) is positioned. Clips (543) are installed on both the left and right sides of the mounting base (541). Sandpaper (544) is laid on the lower surface of the mounting base (541). The sandpaper (544) is clamped and positioned by the clips (543).

8. The yellowing-resistant pre-coated wood veneer processing apparatus according to claim 7, characterized in that, The vibration assembly (55) includes a second housing (551) installed on the rear side of the first housing (531). A second rotating shaft (552) is installed on the left side of the inner cavity of the second housing (551) via a bearing. The second rotating shaft (552) is locked to the first rotating shaft (5322) via a coupling. A first gear (553) is keyed to the outer wall of the second rotating shaft (552). A slide rail (554) is provided on the right side wall of the second housing (551). A swing unit (555) is installed on the right side of the inner cavity of the second housing (551). The first housing (531) vibrates by making centrifugal swing through the swing unit (555).

9. The yellowing-resistant pre-coated wood veneer processing apparatus according to claim 8, characterized in that, The swing unit (555) includes a splined shaft (5551) mounted on the right side of the inner cavity of the second housing (551) via bearings. A bushing (5552) capable of sliding back and forth is sleeved on the front end of the outer wall of the splined shaft (5551). A second gear (5553) meshing with the first gear (5553) is keyed to the front end of the outer wall of the bushing (5552). A push-pull rod (5554) penetrating the slide rail (554) is sleeved on the rear side of the outer wall of the bushing (5552). Moving the push-pull rod (5554) can pull the bushing (5552) on the splined shaft (5551). The outer wall slides back and forth. A swing block (5555) is installed at the rear end of the spline shaft (5551). The swing block (5555) rotates around the spline shaft (5551). A sleeve (5556) is installed at the top of the inner cavity of the second box (551) through a pin. A second spring (5557) and a telescopic rod (5558) are inserted into the inner cavity of the sleeve (5556) from top to bottom. The second spring (5557) applies pressure to the telescopic rod (5558) using its elastic force. The bottom end of the telescopic rod (5558) is connected to the top of the push-pull rod (5554) through a pin.

10. A yellowing-resistant pre-coated wood veneer processing technology, applied in the yellowing-resistant pre-coated wood veneer processing apparatus as described in claim 9, characterized in that, Includes the following steps: Step 1: Drive the roller (22) to rotate clockwise by the first motor (24), the conveyor belt (23) provides the conveying power from left to right, the first spring (252) presses down the slider (253) with elastic force, and the conveyor roller (254) presses the wood veneer tightly on the conveyor belt (23) so that the wood veneer is conveyed smoothly from left to right; Step 2: The lifting device (4) drives the traction component (53) to descend until the sandpaper (544) contacts the wood veneer. The third motor (5321) drives the first rotating shaft (5322) and the rotating drum (5323) to rotate. Due to the different inclination directions on both sides of the guide groove (5324), the inclined surface of the guide groove (5324) alternately presses the roller (535) forward and backward, thereby causing the slide (534) to move back and forth. The sandpaper (544) moves back and forth to rub the wood veneer, thus achieving the sanding and polishing of the horizontal wood veneer. When sanding wood veneer along the grain, the positioning bolt (542) is unscrewed from the slide (534). Driven by the second motor (52), the first box (531) rotates 90 degrees, changing the direction of movement of the slide (534). Then, the positioning bolt (542) is screwed back into the slide (534) to realize the reciprocating motion of the sandpaper (544) to sand the wood veneer along the grain. Step 3: Move the push-pull rod (5554) back and forth, causing the bushing (5552) to move back and forth along the spline shaft (5551). The second gear (5553) engages or disengages from the first gear (5553). As the push-pull rod (5554) moves back and forth, the sleeve (5556) tilts forward or backward. The second spring (5557) pushes the telescopic rod (5558) in the tilting direction, thus positioning the push-pull rod (5554). The first gear (5553) engages or disengages from the second gear (5551). During transmission, the spline shaft (5551) drives the swing block (5555) to perform centrifugal rotation. The center of gravity of the swing block (5555) does not coincide with the rotation center of the spline shaft (5551). The periodically changing centrifugal force causes the spline shaft (5551) to vibrate, which causes the sandpaper (544) to vibrate under the condition of solid energy transmission. As the sandpaper (544) swings continuously, the wood chips accumulated on the surface of the sandpaper (544) are shaken off, so that the surface roughness of the sandpaper (544) can always meet the sanding requirements. Step 4: After polishing, the dust hood (6) sucks away impurities on the surface of the wood veneer, the solenoid valve (72) controls the number of openings according to the width of the wood veneer, and the nozzle (73) sprays paint evenly onto the surface of the wood veneer. After curing, a protective layer is formed on the surface of the wood veneer to prevent discoloration and corrosion.

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