Dehumidifying and drying device for PMMA sheet

Abstract

This invention relates to the field of sheet dehumidification and drying technology, and discloses a dehumidification and drying device for PMMA sheets. The device includes a workbench, a frame plate fixedly connected to the lower side of the workbench, a bearing seat fixedly connected to the top of the frame plate, and a U-shaped clamp plate fixedly connected to the outer wall of the bearing seat's shaft. A pair of protective plates (first and second) are slidably connected to the inner walls of the two sides of the U-shaped clamp plate. Through a swing assembly, the U-shaped clamp plate reciprocates around the shaft of the bearing seat to the left and right. By tilting the U-shaped clamp plate to the left or right, the sheet material, due to its own weight, presses against the inner surface of protective plate one or protective plate two. A magnetic suction assembly pulls apart the non-load-bearing side protective plate, thus orderly exposing one side of the sheet and providing an unobstructed blowing channel for the air gun. Through the reciprocating swing motion from left to right, both sides of the sheet are blew hot air, eliminating the need for manual sheet flipping and achieving automated double-sided dehumidification and drying.

Description

Technical Field

[0001] This invention belongs to the field of sheet dehumidification and drying technology, specifically relating to a dehumidification and drying device for PMMA sheets. Background Technology

[0002] Polymethyl methacrylate (PMMA) is a thermoplastic with excellent transparency, good weather resistance, high surface gloss, and mechanical strength. PMMA sheets are widely used in automotive signal lights and dashboards, pharmaceutical blood containers, industrial DVDs and light diffusers, and everyday items such as beverage cups and stationery. However, PMMA is hygroscopic and readily absorbs moisture from the environment. Therefore, before extrusion, injection molding, and other molding processes, the moisture content of PMMA sheets must be strictly controlled within the required range. Dehumidification and drying are crucial steps to ensure product quality.

[0003] Currently, the industry commonly uses hot air drying or dehumidifying hot air drying for dehumidifying and drying PMMA sheets and other plastic products. Existing drying equipment typically includes a heating system, an air supply system, and a container for holding the raw materials. It uses heated air to flow over the surface of the sheet, thus removing moisture from the material. During operation, the PMMA sheet needs to be placed in a hopper or drying chamber and continuously heated at a set temperature. However, since the sheet is usually stacked or placed still during the drying process, it is difficult for the hot air to evenly contact all surfaces of each sheet, which can easily lead to uneven drying, long drying time, and high energy consumption.

[0004] In current dehumidification and drying processes, PMMA sheets typically require placement on a conveyor belt or fixed clamps for heating and air drying. However, due to the thin sheet structure of PMMA sheets, actual drying operations often require dehumidification of both sides separately. Traditional drying equipment usually only allows hot air to reach the outward-facing side of the sheet when processing it, while the side in contact with the clamps, brackets, or conveyor belt is largely blocked, preventing effective hot air access. This results in severely uneven heating on both sides of the sheet and significant differences in dehumidification efficiency.

[0005] Therefore, the present invention provides a dehumidification and drying device for PMMA sheets. Summary of the Invention

[0006] To overcome the shortcomings of the prior art: to solve at least one technical problem raised in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: A dehumidification and drying device for PMMA sheet of the present invention includes a workbench, a frame plate fixedly connected to the lower side of the workbench, a bearing seat fixedly connected to the top of the frame plate, a U-shaped clamp plate fixedly connected to the outer wall of the shaft of the bearing seat, a pair of guard plates one and a pair of guard plates two slidably connected to the inner walls of the two sides of the U-shaped clamp plate respectively, when the pair of guard plates one and the pair of guard plates two are combined, a groove is formed between them and the U-shaped clamp plate to place and clamp the sheet, a swing assembly is provided on the lower two sides of the U-shaped clamp plate to drive the U-shaped clamp plate to swing to both sides, a magnetic suction assembly is provided on the outer side of the guard plates one and two to drive them to pull apart, a hot air box is provided on both sides of the upper part of the workbench, an air gun is fixedly connected to the bottom of the hot air box, an adjustment assembly is provided on one side of the hot air box, the adjustment assembly can drive the two hot air boxes to converge towards the center and can drive the hot air boxes to move laterally along the surface of the workbench.

[0008] Preferably, the rocking assembly includes two motors, each motor is fixedly connected to one side of the frame plate, and the output shaft of each motor is fixedly connected to a main gear. The teeth of the main gears mesh with driven gears, and the two driven gears are fixedly connected to both ends of the bearing seat shaft.

[0009] Preferably, the magnetic attraction assembly includes two magnet blocks 1 and two magnet blocks 2. Magnet blocks 1 are fixedly connected to both sides of the guard plate 1, and magnet blocks 2 are fixedly connected to both sides of the guard plate 2. A pair of magnet blocks 3 and a pair of magnet blocks 4 are fixedly installed on both sides above the worktable. The magnetic surfaces of magnet blocks 3 and magnet blocks 1 adjacent to each other have the same pole, the magnetic surfaces of magnet blocks 3 and magnet blocks 2 adjacent to each other have opposite poles, the magnetic surfaces of magnet blocks 4 and magnet blocks 1 adjacent to each other have opposite poles, and the magnetic surfaces of magnet blocks 4 and magnet blocks 2 adjacent to each other have the same pole.

[0010] Preferably, side connectors are fixedly connected to both sides of the U-shaped clamp, and plug rods are fixedly connected to the sides of both the first and second guard plates. The plug rods are respectively plugged into the inner wall of the side connectors, and a spring is fixedly connected between one end of the side connector and the side of the plug rod.

[0011] Preferably, a first slotting seat and a second slotting seat are provided on the upper two sides of the workbench. The first slotting seat is fixedly connected to the top of the workbench, and an inclined slide is fixedly connected to one side of the workbench. The second slotting seat is located above the inclined slide, and arc-shaped insert rods are symmetrically fixedly connected to the bottom of the second slotting seat. The arc-shaped insert rods are all inserted into the inner wall of the frame plate. A trapezoidal block is fixedly connected to the end of the arc-shaped insert rod away from the second slotting seat. A slotting component is provided on one side of the trapezoidal block to restrict it.

[0012] Preferably, the adjustment component includes a slide seat, with telescopic rods symmetrically fixedly connected to the inner wall of the slide seat, and L-shaped frame plates fixedly connected to one side of the hot air box. One end of each telescopic rod is fixedly connected to the bottom end of the L-shaped frame plate, and the bottom end of the L-shaped frame plate is slidably connected to the inner wall of the slide seat.

[0013] Preferably, a base platform is fixedly connected to the bottom of the worktable, a bottom support frame is fixedly connected to the bottom of the slide seat, an internal threaded block is fixedly connected to the bottom of the bottom support frame, a second motor is fixedly installed on one side of the base platform, a threaded rod is fixedly connected to the output shaft of the second motor, the threaded rod is rotatably connected to the inner groove on the surface of the base platform, and the internal threaded block is slidably connected to the inner groove on the surface of the base platform.

[0014] Preferably, the positioning assembly includes two slide rod frames, each of which is fixedly connected to one side of the frame plate. A limiting block is slidably connected to the outer wall of the slide rod of the slide rod frame. The inner wall of the limiting block is adapted to the outer wall of the trapezoidal block. A pulling component that drives the pair to move along the surface of the slide rod frame is provided above the limiting block.

[0015] Preferably, the pulling component includes two connecting frames, each of which is fixedly connected to one side of the base support frame. A triangular block is inserted into the inner wall of one end of each base support frame. A spring is fixedly connected between the top of the triangular block and the bottom surface of the connecting frame. A triangular seat is fixedly connected to the top of each limiting block. A wedge-shaped groove is provided on the inner wall of the triangular seat. The triangular seat and the triangular block correspond to and fit each other.

[0016] Preferably, metal pads are fixedly connected to the top of each triangular block, permanent magnet blocks are symmetrically fixedly connected to the bottom of the workbench, the permanent magnet blocks are located above the metal pads, spring three is fixedly connected between the bottom side of the limiting block and the inner side of the slide bar frame, and torsion spring is fixedly connected between the bottom of the card seat two and one side of the frame plate.

[0017] The beneficial effects of this invention are as follows: 1. The PMMA sheet dehumidification and drying device of the present invention uses a swing assembly to make the U-shaped clamping plate reciprocate to the left and right sides around the shaft of the bearing seat. By driving the U-shaped clamping plate to tilt to the left or right, the sheet is pressed against the inner side of the first or second protective plate due to its own weight. With the help of the magnetic suction assembly, the non-load-bearing side protective plate is pulled apart, thereby orderly exposing one side of the sheet and providing an unobstructed blowing channel for the air gun. Through the reciprocating swing action of first left and then right, both sides of the sheet are blown by hot air. There is no need to manually turn the sheet over, realizing automated double-sided dehumidification and drying treatment.

[0018] 2. The PMMA sheet dehumidification and drying device of the present invention uses a magnetic suction component to drive two guard plates (either one or two guard plates) to pull apart or rejoin after the U-shaped clamp is tilted to a preset angle, thereby selectively blocking and releasing the side of the sheet. When the U-shaped clamp is tilted to the left, the magnetic suction component drives the two guard plates on the non-load-bearing side to pull apart, so that side of the sheet is completely exposed to the blowing range of the air gun, while the two guard plates on the load-bearing side remain joined to support the sheet, ensuring that the sheet is stable and does not fall off during the drying process. The same principle applies when the U-shaped clamp is tilted to the right. This device achieves fully automated double-sided dehumidification and drying of PMMA sheets without flipping or transferring them, significantly improving drying efficiency, heating uniformity, and ease of operation, and reducing the risk of product damage. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of the entire invention; Figure 2 This is a schematic diagram of the structure of the workbench in this invention; Figure 3 This is a schematic diagram of the bearing housing structure in this invention; Figure 4 This is a schematic diagram of the U-shaped clamp in this invention; Figure 5 This is a schematic diagram of the structure of the magnet block in this invention; Figure 6 This is a schematic diagram of the structure of the slide seat in this invention; Figure 7 This is a schematic diagram of the structure of the metal gasket in this invention; Figure 8 This is a schematic diagram of the structure at the limiting block in this invention; Figure 9 This is a schematic diagram of the structure of the triangular seat in this invention.

[0021] In the diagram: 1. Workbench; 2. Frame; 3. Bearing seat; 4. U-shaped clamp; 5. Guard plate one; 6. Guard plate two; 7. Hot air box; 8. Air gun; 9. Motor one; 10. Main gear; 11. Driven gear; 12. Magnet block one; 13. Magnet block two; 14. Magnet block three; 15. Magnet block four; 16. Side connector; 17. Connecting rod; 18. Spring one; 19. Locking seat one; 20. Locking seat two; 21. Inclined slide; 2 2. Arc-shaped insert; 23. Trapezoidal block; 24. Limiting block; 25. Torsion spring; 26. Slide seat; 27. Telescopic rod; 28. L-shaped frame plate; 29. ​​Base support frame; 30. Internal threaded block; 31. Threaded rod; 32. Motor II; 33. Connecting frame; 34. Triangular block; 35. Spring II; 36. Triangular seat; 37. Wedge groove; 38. Slide rod frame; 39. Spring III; 40. Metal washer; 41. Permanent magnet block; 42. Base platform. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 9 As shown, the present invention provides a technical solution: a dehumidification and drying device for PMMA sheets, including a workbench 1, a frame plate 2 fixedly connected to the lower side of the workbench 1, a bearing seat 3 fixedly connected to the top of the frame plate 2, a U-shaped clamping plate 4 fixedly connected to the outer wall of the shaft of the bearing seat 3, a pair of guard plates 5 and a pair of guard plates 6 slidably connected to the inner walls of both sides of the U-shaped clamping plate 4, when the pair of guard plates 5 and the pair of guard plates 6 are combined, a groove is formed between them and the U-shaped clamping plate 4 for placing and clamping the sheet, a swinging assembly is provided on the lower two sides of the U-shaped clamping plate 4 to drive the U-shaped clamping plate 4 to swing to both sides, a magnetic suction assembly is provided on the outer side of the guard plates 5 and 6 to drive them to pull apart, hot air boxes 7 are provided on both sides of the upper part of the workbench 1, an air gun 8 is fixedly connected to the bottom of the hot air boxes 7, an adjustment assembly is provided on one side of the hot air boxes 7, the adjustment assembly can drive the two hot air boxes 7 to converge towards the center and can drive the hot air boxes 7 to move laterally along the surface of the workbench 1.

[0024] During operation: Initially, the entire U-shaped clamp 4 is vertical. At this time, one side of the two guard plates 5 and the two guard plates 6 are joined together to form a placement groove. The width and length of the groove are adapted to the width and length of the PMMA sheet. The PMMA sheet to be dehumidified and dried is inserted into the placement groove from above. Then, the swing assembly is activated. The swing assembly will first drive the U-shaped clamp 4 to tilt to the left above the worktable 1. After tilting, the sheet inside the placement groove will press its own weight against the inner side of the guard plate 5. After tilting to a certain angle, the two guard plates 6 will be pulled apart by the magnetic attraction assembly. After being pulled apart, the two guard plates... The second panel 6 will no longer block one side of the sheet, while the two guard plates 5 will remain joined together to support the other side of the sheet. At this time, the hot air box 7 and the air gun 8 are positioned on the upper sides of this side of the sheet. The hot air box 7 has a built-in electric heating tube and a centrifugal fan. After the outside air enters through the air inlet, it is heated to the set temperature and then pressurized by the fan to form a high-temperature airflow that is delivered to the air gun 8. Through the adjustment component, the two hot air boxes 7 converge only towards the center of the workbench 1, so that the spray range of the air gun 8 gradually scans from the edge of this side of the sheet to the center area, ensuring that the hot air evenly covers the entire surface to be dried, thereby completing the dehumidification and drying treatment of one side of the sheet. After dehumidifying and drying this side, the swing assembly drives the U-shaped clamp 4 back to its initial vertical position. During the resetting process, the two guard plates 6, which were originally pulled apart, move in opposite directions under the action of the magnetic attraction assembly and re-merge, so that guard plate 5 and guard plate 6 together once again form a complete clamping groove for the sheet. Then the swing assembly continues to move, causing the U-shaped clamp 4 to tilt to the right above the worktable 1. When the U-shaped clamp 4 tilts to the right at a preset angle, the sheet placed inside the groove presses its side against the inner side of guard plate 6 due to its own weight. At the same time, the magnetic attraction assembly pulls the two guard plates 5 apart so that they no longer block the other side of the sheet, and the two guard plates 6 continue to... The sheet is kept in a combined state to provide stable support from the other side. Then, the hot air box 7 and the air gun 8 are moved laterally along the surface of the workbench 1 to directly above the sheet. Then, the two hot air boxes 7 converge towards the center of the workbench 1, so that the air gun 8 blows hot air to various areas on the other side of the sheet, thereby completing the dehumidification and drying treatment of the other side of the sheet. In this way, both sides of the sheet can be dehumidified and dried. After both sides are completely treated, the swing component drives the U-shaped clamp 4 to continue to tilt to the right until the opening end of the placement groove of the entire U-shaped clamp 4 faces downward. At this time, the sheet can automatically slide out of the placement groove by its own weight, completing the unloading action. In the above embodiment, the U-shaped clamp 4 reciprocates around the axis of the bearing seat 3 via the swing assembly, causing the U-shaped clamp 4 to tilt to the left or right. This causes the sheet to press against the inner side of the first guard plate 5 or the second guard plate 6 due to its own weight. The magnetic suction assembly then pulls apart the guard plate on the non-load-bearing side, thus exposing one side of the sheet in an orderly manner. This provides an unobstructed blowing channel for the air gun 8. Through the reciprocating swing motion from left to right, both sides of the sheet are blown by hot air, eliminating the need for manual sheet flipping and achieving automated double-sided dehumidification and drying. The magnetic suction assembly is used to drive the two... The protective plate 5 or the two protective plates 6 can be pulled apart or repositioned to selectively shield and release the side of the sheet. When the U-shaped clamp 4 is tilted to the left, the magnetic component drives the two protective plates 6 on the non-load-bearing side to be pulled apart, so that side of the sheet is fully exposed to the blowing range of the air gun 8. At the same time, the two protective plates 5 on the load-bearing side remain joined to support the sheet, ensuring that the sheet is stable and does not fall off during the drying process. The same principle applies when the U-shaped clamp 4 is tilted to the right. This achieves fully automated double-sided dehumidification and drying of PMMA sheets without flipping or transferring them, significantly improving drying efficiency, heating uniformity, and ease of operation, and reducing the risk of product damage.

[0025] like Figures 2 to 3 As shown, the rocking assembly includes two motors 9, which are fixedly connected to one side of the frame plate 2. The output shafts of the motors 9 are fixedly connected to main gears 10, and the teeth of the main gears 10 are meshed with driven gears 11. The two driven gears 11 are fixedly connected to both ends of the shaft of the bearing seat 3.

[0026] During operation: When the swing assembly is started, the two motors 9 drive the main gear 10 to rotate through their output shafts. The main gear 10 drives the driven gear 11 to rotate through tooth meshing. The driven gear 11 transmits torque to the shaft of the bearing seat 3, thereby driving the U-shaped clamp 4 fixed to the outer wall of the shaft to swing back and forth around the shaft. When it is necessary to tilt to the left, the motor 9 rotates forward to drive the U-shaped clamp 4 to swing to the left. When it is necessary to reset or tilt to the right, the motor 9 rotates in reverse and drives the U-shaped clamp 4 to return to the center or swing to the right through the reverse gear transmission. This achieves precise switching of the sheet posture. With the opening and closing of the guard plate of the magnetic suction assembly, the entire process of double-sided drying and automatic feeding is completed.

[0027] like Figures 3 to 5As shown, the magnetic attraction assembly includes two magnet blocks 12 and two magnet blocks 13. Magnet blocks 12 are fixedly connected to both sides of the guard plate 1 5, and magnet blocks 13 are fixedly connected to both sides of the guard plate 2 6. A pair of magnet blocks 3 14 and a pair of magnet blocks 4 15 are fixedly installed on both sides above the workbench 1. The magnetic surfaces of magnet blocks 3 14 and magnet blocks 12 adjacent to each other have the same polarity, while the magnetic surfaces of magnet blocks 3 14 and magnet blocks 2 13 adjacent to each other have opposite polarities. The magnetic surfaces of magnet blocks 4 15 and magnet blocks 12 adjacent to each other have opposite polarities, while the magnetic surfaces of magnet blocks 4 15 and magnet blocks 2 13 adjacent to each other have the same polarity.

[0028] During operation: After the sheet is placed in the groove, the swing assembly drives the U-shaped clamp 4 to tilt to the left. When tilted to the preset angle, magnet 13 is positioned on one side of magnet 14 and enters its magnetic field. Since the magnetic poles of the adjacent surfaces of magnet 14 and magnet 13 are opposite, they generate a magnetic force that attracts each other, thereby pulling the two guard plates 6 apart along the side wall groove of the U-shaped clamp 4, fully exposing this side of the sheet. At the same time, the magnetic poles of the adjacent surfaces of magnet 14 and magnet 12 are the same, generating a magnetic force that repels each other, further ensuring that the two guard plates 5 remain joined and are not accidentally pulled apart, providing stable support for the sheet from the other side. When the dehumidification and drying process of this side is completed, when the swing assembly drives the U-shaped clamp 4 back to its original position, magnet 13 moves away from the U-shaped clamp 4. When the magnetic force of magnet block 3 14 is released, the magnetic attraction disappears, and the two guard plates 2 6 return to their original positions and merge. Subsequently, the swing assembly drives the U-shaped clamp 4 to tilt to the right. When it tilts to the right at a preset angle, magnet blocks 12 on both sides of guard plate 1 5 just enter the magnetic force range of magnet block 4 15. Since the magnetic poles of the adjacent surfaces of magnet block 4 15 and magnet block 12 are opposite, they generate a magnetic force that attracts each other, pulling the two guard plates 1 5 apart to the sides, exposing the other side of the sheet. At the same time, the magnetic poles of the adjacent surfaces of magnet block 4 15 and magnet block 2 13 are the same, generating a repulsive force that keeps the two guard plates 2 6 merged to support the other side of the sheet. Similarly, when the U-shaped clamp 4 returns to the center or continues to tilt to the right at a larger angle, the magnetic force between magnet block 12 and magnet block 4 15 disappears, and both guard plates 1 5 can return to their original positions and merge.

[0029] like Figures 3 to 4 As shown, side connectors 16 are fixedly connected to both sides of the U-shaped clamp 4, and plug rods 17 are fixedly connected to the sides of the first guard plate 5 and the second guard plate 6. The plug rods 17 are respectively plugged into the inner wall of the side connectors 16, and springs 18 are fixedly connected between one end of the side connectors 16 and the side of the plug rods 17.

[0030] During operation: When the magnetic suction assembly drives the guard plate to pull outward, the plug rod 17 slides outward along the inner wall of the side connector 16, and the spring 18 is stretched; when the U-shaped clamp 4 deflects away from the magnetic range, the magnetic force is removed, the spring 18 returns to its original position and pulls the plug rod 17 to slide inward, thereby causing the guard plate 5 or the guard plate 6 to automatically merge and return to its original position. Throughout the process, the sliding plug-in engagement between the plug rod 17 and the side connector 16 guides and limits the movement of the guard plate, ensuring that the guard plate slides along a fixed trajectory without deviating.

[0031] like Figure 4 and Figure 7 As shown, a first slot seat 19 and a second slot seat 20 are provided on the upper two sides of the workbench 1. The first slot seat 19 is fixedly connected to the top of the workbench 1. An inclined slide 21 is fixedly connected to one side of the workbench 1. The second slot seat 20 is located above the inclined slide 21. Arc-shaped insert rods 22 are symmetrically fixedly connected to the bottom of the second slot seat 20. The arc-shaped insert rods 22 are all inserted into the inner wall of the frame plate 2. A trapezoidal block 23 is fixedly connected to the end of the arc-shaped insert rods 22 away from the second slot seat 20. A slotting component is provided on one side of the trapezoidal block 23 to restrict it.

[0032] During operation: When the swing assembly causes the U-shaped clamp 4 to tilt to the left, one side of the U-shaped clamp 4 eventually rests against the top of the locking seat 19, which provides precise positioning and stable support. When the U-shaped clamp 4 tilts to the right, the other side of the U-shaped clamp 4 rests against the top of the locking seat 20. Initially, the locking seat 20 remains stationary under the limiting action of the locking assembly on the trapezoidal block 23, allowing the U-shaped clamp 4 to remain stable in this right-side position, thus completing the dehumidification and drying process on the other side of the sheet. After both sides are completely dried, the locking assembly releases the restriction on the trapezoidal block 23, and the swing assembly continues... The U-shaped clamp 4 is tilted further to the right, and one side of the U-shaped clamp 4 presses down on the second locking seat 20, causing the second locking seat 20 and the arc-shaped insert 22 to slide down along the inner wall of the frame plate 2, making room for the U-shaped clamp 4 to continue to tilt to the right. At the same time, the opening end of the placement groove of the U-shaped clamp 4 gradually faces the inclined slide table 21 at an angle downward. The sheet slides out of the groove by gravity and slides down the inclined slide table 21 to complete the unloading. The cooperation between the first locking seat 19 and the second locking seat 20 not only ensures stable stopping when drying with left and right tilts, but also realizes the function of the second locking seat 20 to give way when unloading by releasing the locking component, ensuring smooth automatic unloading.

[0033] like Figures 6 to 7 As shown, the adjustment assembly includes a slide seat 26, with telescopic rods 27 symmetrically fixedly connected to the inner wall of the slide seat 26. L-shaped frame plates 28 are fixedly connected to one side of the hot air box 7. One end of the telescopic rod 27 is fixedly connected to the bottom end of the L-shaped frame plate 28, and the bottom end of the L-shaped frame plate 28 is slidably connected to the inner wall of the slide seat 26.

[0034] During operation: When the U-shaped clamp 4 tilts to the left and stops at the top of the clamping seat 19, the hot air box 7 and the air gun 8 are located on both sides above the sheet. The adjustment component starts to move, the telescopic rod 27 retracts, and pushes the L-shaped frame plate 28 to slide along the inner wall of the slide seat 26 towards the center, thereby driving the two hot air boxes 7 to converge towards the center of the worktable 1, so that the spray range of the air gun 8 gradually covers the surface of the sheet to be dried. When the telescopic rod 27 retracts, it pulls the L-shaped frame plate 28 and the hot air box 7 to reset outward, making room for the sheet posture to switch.

[0035] like Figures 7 to 9 As shown, a base platform 42 is fixedly connected to the bottom of the workbench 1, a bottom support frame 29 is fixedly connected to the bottom of the slide seat 26, an internal thread block 30 is fixedly connected to the bottom of the bottom support frame 29, a second motor 32 is fixedly installed on one side of the base platform 42, a threaded rod 31 is fixedly connected to the output shaft of the second motor 32, the threaded rod 31 is rotatably connected to the inner groove on the surface of the base platform 42, and the internal thread block 30 is slidably connected to the inner groove on the surface of the base platform 42.

[0036] During operation: When the U-shaped clamp 4 tilts to the right and stops at the top of the second clamping seat 20, the adjustment component starts to adjust the lateral position of the hot air box 7. The second motor 32 starts, driving the threaded rod 31 to rotate. The internal threaded block 30 slides along the inner groove of the base platform 42. The internal threaded block 30 drives the entire slide seat 26 and the hot air box 7 installed on it to move laterally synchronously through the bottom support frame 29, so that the hot air box 7 moves from the initial position to directly above the sheet at this time, ensuring that the air gun 8 is accurately aimed at the side of the sheet to be dried. After it is in place, the telescopic rod 27 pushes the L-shaped frame plate 28 to slide along the inner wall of the slide seat 26, so that the two hot air boxes 7 converge towards the center. The air gun 8 can then blow hot air to various areas of the sheet on this side to complete the dehumidification and drying treatment of this side. After the sheet tilts to the right for dehumidification and drying, the second motor 32 drives the threaded rod 31 to rotate in the opposite direction, and the hot air box 7 moves in the opposite direction to return to the initial position.

[0037] like Figures 7 to 9 As shown, the positioning assembly includes two slide rod frames 38, each of which is fixedly connected to one side of the frame plate 2. A limiting block 24 is slidably connected to the outer wall of the slide rod of the slide rod frame 38. The inner wall of the limiting block 24 is adapted to the outer wall of the trapezoidal block 23. A pulling component that drives the pair to move along the surface of the slide rod frame 38 is provided above the limiting block 24.

[0038] During operation: In the initial state, the trapezoidal block 23 is embedded in the inner wall of the limiting block 24, and the two are interlocked, preventing the locking seat 20 from being pressed down, thus maintaining the stability of its top position and providing reliable limiting support when the U-shaped clamp 4 tilts to the right; after the U-shaped clamp 4 tilts to the right and stops at the top of the locking seat 20, the hot air box 7 moves laterally above the sheet through the adjusting component for dehumidification and drying; after the surface is dried, the hot air box 7 moves in the reverse direction to reset, and during the reset, the pulling component drives the limiting block 24 along the slide bar 38. The rod moves laterally, causing the inner wall of the limiting block 24 to disengage from the outer wall of the trapezoidal block 23, thus releasing the restriction on the second locking seat 20. Subsequently, the swing assembly continues to drive the U-shaped clamp 4 to tilt further to the right. One side of the U-shaped clamp 4 presses down on the second locking seat 20, causing the second locking seat 20, together with the arc-shaped insert rod 22, to slide downward along the inner wall of the frame plate 2. The trapezoidal block 23 moves downward and moves away from the range of the limiting block 24, making room for the U-shaped clamp 4 to continue to swing to the right. The opening end of the groove gradually faces the inclined slide table 21 at an angle downward, and the sheet material slides out automatically by gravity to complete the unloading.

[0039] like Figures 7 to 9 As shown, the pulling assembly includes two connecting frames 33, each of which is fixedly connected to one side of the base support frame 29. A triangular block 34 is inserted into the inner wall of one end of the base support frame 29. A spring 35 is fixedly connected between the top of the triangular block 34 and the bottom surface of the connecting frame 33. A triangular seat 36 is fixedly connected to the top of the limiting block 24. A wedge-shaped groove 37 is provided on the inner wall of the triangular seat 36. The triangular seat 36 and the triangular block 34 correspond to and fit each other.

[0040] During operation: When the hot air box 7 moves laterally to the right side above the sheet for dehumidification and drying via the adjusting component, the bottom support frame 29 drives the connecting frame 33 and the triangular block 34 to move laterally to the right simultaneously. After the inclined surface of the triangular block 34 contacts the inclined surface of the triangular seat 36, under the guidance of the inclined surface, the triangular block 34 moves upward along the inclined surface and compresses the second spring 35 to store energy. As the bottom support frame 29 continues to move to the right, the triangular block 34 passes the top of the inclined surface of the triangular seat 36 and then smoothly inserts into the wedge-shaped groove 37 of the triangular seat 36. At this time, the second spring 35 slightly rebounds, causing the triangular block 34 to engage with the wedge shape. Inside the groove 37, the hot air box 7 also moves laterally to directly above the sheet material that is tilted to the right, and begins to dehumidify and dry that side. When the hot air box 7 completes the drying process on that side and moves back to its original position through the adjusting component, the plane of the triangular block 34 engages with the plane of the wedge groove 37 for guidance. The triangular block 34 pulls the limiting block 24 along the slide bar of the slide bar frame 38 through the triangular seat 36, causing the inner wall of the limiting block 24 to disengage from the outer wall of the trapezoidal block 23, thereby releasing the locking restriction on the second locking seat 20 and preparing for the subsequent U-shaped clamp 4 to continue tilting to the right for material feeding.

[0041] like Figures 7 to 9As shown, metal pads 40 are fixedly connected to the top of each triangular block 34, permanent magnet blocks 41 are symmetrically fixedly connected to the bottom of the workbench 1, and permanent magnet blocks 41 are located above the metal pads 40. Spring 39 is fixedly connected between the bottom side of the limiting block 24 and the inner side of the slide bar frame 38, and torsion spring 25 is fixedly connected between the bottom of the card slot 20 and one side of the frame plate 2.

[0042] During operation: When the hot air box 7 moves in the reverse reset direction, the limiting block 24 slides upward along the slide bar of the slide bar frame 38, the spring 39 is stretched and stored, releasing the lock on the second locking seat 20. Subsequently, the U-shaped clamp 4 continues to tilt downward to the right and press the second locking seat 20. The second locking seat 20 drives the arc-shaped insert 22 and the trapezoidal block 23 to move downward. The torsion spring 25 is twisted and stored. After the trapezoidal block 23 leaves the range of the limiting block 24, the opening end of the placement groove of the U-shaped clamp 4 faces the inclined slide table 21 at an angle downward. The sheet slides out by gravity to complete the unloading. After the unloading is completed, the U-shaped clamp 4 immediately returns to the initial vertical state. At this time, under the reset torque of the torsion spring 25, the second locking seat 20 first drives the arc-shaped insert 22 and the trapezoidal block 23 to move downward. 3. The hot air box 7 continues to move back to its initial position, and the triangular block 34 also moves back to its initial position. It moves to the magnetic range below the permanent magnet block 41. The metal pad 40 is attracted by the permanent magnet block 41, which drives the triangular block 34 to move upward, so that the triangular block 34 is separated from the inner wall of the wedge groove 37. Thus, the triangular seat 36 loses the constraint of the triangular block 34. Under the contraction and reset action of the spring 39, the limiting block 24 slides down along the slide bar of the slide bar frame 38 to reset, so that the inner wall of the limiting block 24 re-engages with the outer wall of the trapezoidal block 23, and restores the locking of the locking seat 20. At this point, the entire device completes a complete working cycle, preparing for the dehumidification and drying treatment of the next batch of PMMA sheets.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dehumidification and drying device for PMMA sheets, comprising a workbench, characterized in that: A frame plate is fixedly connected to the lower side of the workbench, and a bearing seat is fixedly connected to the top of the frame plate. A U-shaped clamp is fixedly connected to the outer wall of the shaft of the bearing seat. A pair of guard plates one and a pair of guard plates two are slidably connected to the inner walls of the two sides of the U-shaped clamp. When the pair of guard plates one and the pair of guard plates two are combined, they form a groove with the U-shaped clamp to place and clamp the sheet. A swing assembly is provided on the lower two sides of the U-shaped clamp to drive the U-shaped clamp to swing to both sides. A magnetic suction assembly is provided on the outer side of guard plates one and two to pull them apart. Hot air boxes are provided on both sides of the upper part of the workbench. Air guns are fixedly connected to the bottom of each hot air box. An adjustment assembly is provided on one side of the hot air box. The adjustment assembly can drive the two hot air boxes to converge towards the center and can drive the hot air boxes to move laterally along the surface of the workbench.

2. The dehumidification and drying device for PMMA sheets according to claim 1, characterized in that: The rocking assembly includes two motors, which are fixedly connected to one side of the frame plate. The output shaft of each motor is fixedly connected to a main gear, and the teeth of the main gear mesh with driven gears. The two driven gears are fixedly connected to both ends of the bearing seat shaft.

3. The dehumidification and drying device for PMMA sheets according to claim 2, characterized in that: The magnetic attraction assembly includes two magnet blocks 1 and two magnet blocks 2. Magnet blocks 1 are fixedly connected to both sides of guard plate 1, and magnet blocks 2 are fixedly connected to both sides of guard plate 2. A pair of magnet blocks 3 and a pair of magnet blocks 4 are fixedly installed on both sides above the worktable. The magnetic surfaces of magnet blocks 3 and magnet blocks 1 adjacent to each other have the same pole, the magnetic surfaces of magnet blocks 3 and magnet blocks 2 adjacent to each other have opposite poles, the magnetic surfaces of magnet blocks 4 and magnet blocks 1 adjacent to each other have opposite poles, and the magnetic surfaces of magnet blocks 4 and magnet blocks 2 adjacent to each other have the same pole.

4. The dehumidification and drying device for PMMA sheets according to claim 3, characterized in that: Both sides of the U-shaped clamp are fixedly connected to side connectors. The sides of the first and second guard plates are fixedly connected to plug rods. The plug rods are respectively plugged into the inner wall of the side connectors. A spring is fixedly connected between one end of the side connector and the side of the plug rod.

5. The dehumidification and drying device for PMMA sheets according to claim 4, characterized in that: The workbench is equipped with two slot seats, slot seat 1 and slot seat 2, on the upper sides. Slot seat 1 is fixedly connected to the top of the workbench. An inclined slide is fixedly connected to one side of the workbench. Slot seat 2 is located above the inclined slide. Arc-shaped insert rods are symmetrically fixedly connected to the bottom of slot seat 2. The arc-shaped insert rods are all inserted into the inner wall of the frame plate. A trapezoidal block is fixedly connected to the end of the arc-shaped insert rod away from slot seat 2. A slotting component is provided on one side of the trapezoidal block to restrict it.

6. The dehumidification and drying device for PMMA sheets according to claim 5, characterized in that: The adjustment assembly includes a slide seat, with telescopic rods symmetrically fixedly connected to the inner wall of the slide seat. L-shaped frame plates are fixedly connected to one side of the hot air box. One end of each telescopic rod is fixedly connected to the bottom end of the L-shaped frame plate, and the bottom end of the L-shaped frame plate is slidably connected to the inner wall of the slide seat.

7. The dehumidification and drying device for PMMA sheets according to claim 6, characterized in that: The bottom of the workbench is fixedly connected to a base platform, the bottom of the slide block is fixedly connected to a bottom support frame, the bottom of the bottom support frame is fixedly connected to an internal thread block, a second motor is fixedly installed on one side of the base platform, the output shaft of the second motor is fixedly connected to a threaded rod, the threaded rod is rotatably connected to the inner groove on the surface of the base platform, and the internal thread block is slidably connected to the inner groove on the surface of the base platform.

8. The dehumidification and drying device for PMMA sheets according to claim 7, characterized in that: The positioning assembly includes two slide rod frames, each fixedly connected to one side of the frame plate. A limiting block is slidably connected to the outer wall of the slide rod of the slide rod frame. The inner wall of the limiting block is adapted to the outer wall of the trapezoidal block. A pulling component is provided above the limiting block to drive the pair to move along the surface of the slide rod frame.

9. A dehumidification and drying device for PMMA sheets according to claim 8, characterized in that: The pulling assembly includes two connecting frames, each fixedly connected to one side of the base support frame. A triangular block is inserted into the inner wall of one end of each base support frame. A spring is fixedly connected between the top of the triangular block and the bottom surface of the connecting frame. A triangular seat is fixedly connected to the top of each limiting block. A wedge-shaped groove is opened on the inner wall of the triangular seat. The triangular seat and the triangular block correspond to and fit each other.

10. A dehumidification and drying device for PMMA sheets according to claim 9, characterized in that: Metal pads are fixedly connected to the top of each triangular block. Permanent magnet blocks are symmetrically fixedly connected to the bottom of the workbench. The permanent magnet blocks are located above the metal pads. Spring three is fixedly connected between the bottom side of the limiting block and the inner side of the slide bar frame. Torsion spring is fixedly connected between the bottom of the card slot two and one side of the frame plate.

Images