Drying and purifying device capable of preventing coating from cracking

Abstract

The invention discloses a drying and purifying device capable of preventing a coating from cracking, which comprises a drying box body, a heat preservation baffle plate is arranged in the drying box body, the drying box body is divided into a preheating area and a drying area by the heat preservation baffle plate, and an inlet hole for a sample to pass through is formed in the heat preservation baffle plate; the first heating unit is used for heating the drying area to a drying temperature; the second heating unit is used for heating the preheating area to a preheating temperature lower than the drying temperature; the conveying mechanism comprises a placing table used for bearing the sample, and the conveying mechanism is used for driving the placing table to penetrate through the inlet hole, so that the sample moves between the preheating area and the drying area; the hot air circulation unit is used for circulating air in the drying area so as to carry out air heat drying on the sample; the device has the advantages that the coating can be prevented from cracking, the drying quality and the yield of a designed sample are improved, and surface dust point defects and harmful gas pollution can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to a drying device, in particular to a drying and purifying device capable of preventing coating cracking. BACKGROUND

[0002] In the field of modern industrial design and artistic creation, the production of design samples is a key link in product development, and its visual effect and surface quality are crucial. In order to achieve a high-quality appearance, the surface of the sample usually needs to be sprayed, and the drying process after spraying is a decisive step that determines the quality of the coating, directly affecting the adhesion, gloss and durability of the coating. Therefore, a set of efficient and reliable design sample drying device plays a vital role in ensuring the full play of coating performance, improving the qualified rate of finished products, reducing the cost of rework, and even improving the overall design efficiency and product competitiveness.

[0003] At present, for the drying treatment of design samples, the existing technology mainly adopts the traditional hot air drying box. The technical scheme of this kind of equipment is relatively mature, and its structure is usually composed of a box body, a heating system, a fan and a temperature control device. Its working mode is generally to place the sprayed design sample directly in the drying box, start the heating system to heat the air in the box, and use the fan to force the hot air to circulate in the box to achieve drying of the sample coating through convection heat exchange. Some devices are equipped with a basic temperature control system, which can set the drying temperature and time, and are easy to operate and widely used.

[0004] Although the above-mentioned traditional drying method is easy to operate, it has many limitations in actual application, which seriously affects the final drying quality. The most prominent problem is the coating quality defect caused by temperature shock. When the design sample is directly sent from room temperature environment to high temperature drying box, the coating will produce significant thermal stress inside due to the sharp change of temperature. This stress is easy to cause coating cracking, blistering and peeling, especially for samples with thick or multi-layer coating, the problem is particularly serious. In addition, the existing equipment generally lacks effective air purification mechanism. In the drying process, the original dust particles in the air and the volatile organic solvents in the paint will pollute the coating surface with the hot air circulation, forming orange peel, pitting and other appearance defects, which seriously affect the visual quality of the sample. These technical defects together result in low drying yield and high rework cost, limiting the batch production of high-quality design samples. Therefore, it is urgent to develop a new type of drying device to overcome the above shortcomings. SUMMARY

[0005] The purpose of the present application is to provide a drying and purifying device capable of preventing coating cracking, improving the drying quality and yield of design samples, and avoiding surface dust defect and harmful gas pollution.

[0006] To achieve the above object, the present application provides the following technical scheme: A drying and purifying device capable of preventing coating from cracking, comprising a drying box, wherein: a heat-insulating blocking plate is arranged in the drying box, and the drying box is divided into a preheating area and a drying area by the heat-insulating blocking plate, and an entering hole is formed in the heat-insulating blocking plate for the sample to pass through; a first heating unit is arranged for heating the drying area to a drying temperature; a second heating unit is arranged for heating the preheating area to a preheating temperature which is lower than the drying temperature; a conveying mechanism is arranged, and the conveying mechanism comprises a placing table for carrying the sample, and the conveying mechanism is arranged for driving the placing table to pass through the entering hole so as to move the sample between the preheating area and the drying area; a hot air circulating unit is arranged for circulating air in the drying area so as to dry the sample by hot air; and a purifying mechanism is arranged on the air circulation path of the hot air circulating unit, and the purifying mechanism is arranged for filtering dust in the air and purifying harmful gas.

[0007] Preferably, the conveying mechanism comprises a vertically arranged shielding plate, a placing table and an electric push rod, the electric push rod is fixedly installed on the top of the drying box, the placing table is horizontally fixedly extended from the lower part of the shielding plate and is arranged for carrying the sample, and the telescopic end of the electric push rod is fixedly connected with the shielding plate and is arranged for driving the shielding plate to move in the drying box.

[0008] Preferably, guide grooves are formed on the surface of the drying box, and guide blocks are fixedly installed on the shielding plate and are arranged for being slidingly connected in the guide grooves.

[0009] Preferably, the device further comprises a first heat-insulating plate and a linkage mechanism, the first heat-insulating plate is rotatably arranged at the entering hole and is arranged for opening and closing the entering hole, and the linkage mechanism is connected between the shielding plate and the first heat-insulating plate, and the linkage mechanism is arranged for synchronously opening the first heat-insulating plate when the shielding plate drives the placing table to pass through the entering hole, and closing the first heat-insulating plate when the placing table is completely located in the preheating area or the drying area so as to seal the entering hole.

[0010] Preferably, the linkage mechanism comprises a connecting rod, a first gear, a first rack, a second gear and a second rack, the first rack is fixed to the shielding plate through a connecting frame, the connecting rod is rotatably arranged on the shielding plate, the first heat preservation plate is fixedly installed on the connecting rod, the first gear is coaxially fixedly installed on the connecting rod, and the first gear is in mesh with the first rack, the second gear is rotatably arranged on the drying box body, the second rack is also fixed to the connecting frame and is arranged in parallel with the first rack, and the second rack is also in mesh with the second gear.

[0011] Preferably, the linkage mechanism comprises a connecting rod, a first gear, a first rack, a second gear and a second rack, the first rack is fixed to the shielding plate through a connecting frame, the connecting rod is rotatably arranged on the shielding plate, the first heat preservation plate is fixedly installed on the connecting rod, the first gear is coaxially fixedly installed on the connecting rod, and the first gear is in mesh with the first rack, the second gear is rotatably arranged on the drying box body, the second rack is also fixed to the connecting frame and is arranged in parallel with the first rack, and the second rack is also in mesh with the second gear.

[0012] Preferably, the hot air circulation unit comprises a fan, a wind box, an air outlet pipe, a connecting box, a connecting pipe and an air inlet pipe, the fan is used for providing air circulation power, one end of the air outlet pipe is communicated with the drying area, the other end is communicated with the connecting box, the connecting box is provided with the purification mechanism, one end of the connecting pipe is communicated with the connecting box, the other end is communicated with the air inlet end of the fan, the air outlet end of the fan is communicated with the air inlet end of the wind box through the air inlet pipe, and the wind box is arranged in the drying area and is fixedly installed with a plurality of partition plates on the inner wall of the wind box.

[0013] Preferably, the purification mechanism comprises a dustproof net and an activated carbon plate, two placing grooves are formed in the inner wall of the connecting box and are used for containing the dustproof net and the activated carbon plate respectively, the dustproof net is slidably connected to the inner cavity of one of the placing grooves, and the activated carbon plate is slidably connected to the inner cavity of the other placing groove.

[0014] Preferably, the surface of the drying box body is rotatably connected with a sealing door through a hinge, the surface of the drying box body is also provided with an observation hole, and the inner cavity of the observation hole is inlaid with heat preservation glass.

[0015] Compared with the prior art, the advantages of the present application are that the heat preservation resistance plate physically separates the box into a preheating area and a drying area, the second heating unit and the first heating unit independently control the temperature of the two areas respectively, the preheating area can be stably kept at an intermediate temperature lower than the drying temperature, when the sample is sent into the preheating area, the sample can be gradiently heated, the internal stress of the coating is effectively eliminated, and the cracking is prevented, after the preheating is completed, the conveying mechanism automatically drives the placing table, the sample passes through the entering hole and moves into the high-temperature drying area, in the drying area, the hot air circulating unit starts to work, the hot air is uniformly blown to the sample to realize the efficient hot air drying, at the same time, the circulating air is forced to pass through the purifying mechanism arranged on the circulating path, the mechanism can filter the dust in the air and purify the harmful gas, so that the pitting on the surface of the sample is prevented, and the finally dried sample coating is complete and clean, which helps to improve the yield. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by the drawings provided by the person skilled in the art without creative labor.

[0017] Figure 1 is a schematic diagram of the three-dimensional structure of the present application; Figure 2 is a schematic diagram of the back structure of the drying box in the present application; Figure 3 is a structural sectional view of the drying box in the present application; Figure 4 is a schematic diagram of the structure of the bottom of the placing table in the present application; Figure 5 is a schematic diagram of the structure of the connecting box and the air box in the present application; Figure 6 is a structural sectional view of the connecting box in the present application; Figure 7 is a schematic diagram of the structure of the connecting box in the present application; Figure 6 is an enlarged view of A in the present application; Figure 8 is a schematic diagram of the three-dimensional structure of the linkage mechanism in the present application.

[0018] In the diagram, 1. Drying chamber; 2. Insulation plate; 3. Preheating area; 4. Drying area; 5. Inlet hole; 6. First heating unit; 7. Second heating unit; 8. Conveying mechanism; 9. Placement platform; 10. Hot air circulation unit; 11. Purification mechanism; 12. Baffle plate; 13. Electric push rod; 14. Guide groove; 15. Guide block; 16. First insulation plate; 17. Linkage mechanism; 18. Connecting rod; 19. First gear; 20. First rack. 21. Second gear; 22. Second rack; 23. Connecting frame; 24. Rotating disk; 25. Motor; 26. Movable rod; 27. Fourth gear; 28. Third gear; 29. ​​Fan; 30. Air box; 31. Air outlet duct; 32. Connecting box; 33. Connecting pipe; 34. Air inlet duct; 35. Dividing plate; 36. Dustproof net; 37. Activated carbon plate; 38. Placement slot; 39. Sealed door; 40. Hinge; 41. Observation hole; 42. Insulated glass. Detailed Implementation

[0019] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the content of the embodiments. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] Example 1: As Figures 1-8 As shown, a drying and purification device for preventing coating cracking includes a drying chamber 1, and the drying chamber 1 is equipped with: A heat insulation plate 2 divides the drying chamber 1 into a preheating area 3 and a drying area 4, and the heat insulation plate 2 is provided with an entry hole 5 for the sample to pass through. A first heating unit 6 is used to heat the drying zone 4 to a drying temperature; A second heating unit 7 is used to heat the preheating zone 3 to a preheating temperature lower than the drying temperature; A conveying mechanism 8 includes a placement stage 9 for carrying the sample. The conveying mechanism 8 is used to drive the placement stage 9 through the inlet hole 5 so that the sample moves between the preheating zone 3 and the drying zone 4. A hot air circulation unit 10 is used to circulate the air in the drying zone 4 to perform hot air drying on the sample. And a purification mechanism 11, which is located on the air circulation path of the hot air circulation unit 10, for filtering dust in the air and purifying harmful gases.

[0021] In one example, the present invention provides a drying and purification device for preventing coating cracking, the device including a drying chamber 1, the drying chamber 1 providing a closed installation and working space for other components of the device.

[0022] In one embodiment, to address the coating cracking problem caused by temperature shock in the prior art, a heat-insulating baffle 2 is installed inside the drying chamber 1. The heat-insulating baffle 2 divides the drying chamber 1 into a preheating zone 3 and a drying zone 4. This physical partitioning is the structural basis for achieving gradient heating. An entry hole 5 is also provided on the heat-insulating baffle 2 for the sample to pass between the two zones. To achieve true gradient preheating, the device further includes a first heating unit 6 and a second heating unit 7. The first heating unit 6 heats the drying zone 4 to a drying temperature, and the second heating unit 7 independently heats the preheating zone 3 to a preheating temperature lower than the drying temperature. By setting two independent heating units, this solution ensures that the preheating zone 3 is stably maintained at an intermediate temperature. The sample first undergoes gradient heating in the preheating zone to eliminate internal stress in the coating before entering the high-temperature drying zone 4. This method avoids severe thermal shock, thereby preventing coating cracking.

[0023] In one embodiment, the device further includes a conveying mechanism 8, which includes a stage 9 for carrying the sample. The conveying mechanism 8 drives the stage 9 to pass through the inlet hole 5, so that the sample moves automatically between the preheating zone 3 and the drying zone 4. This structure automates the process flow and ensures that the processing time of the sample in different temperature zones is precisely controlled.

[0024] In one embodiment, after the sample is transferred to the drying zone 4, the apparatus further includes a hot air circulation unit 10, which circulates the air within the drying zone 4. This structure provides efficient and uniform hot air drying for the sample. However, air circulation may stir up dust or harmful gases volatilized from the coating within the drying chamber, which, as noted in the background art, can lead to surface defects. To address this issue, the apparatus also includes a purification mechanism 11, located in the air circulation path of the hot air circulation unit 10. This structure ensures that all circulating air used for drying must first undergo purification treatment. The purification mechanism 11 filters dust from the air and purifies harmful gases. In this way, only clean hot air can contact the sample surface, effectively preventing defects such as pitting and ensuring a high-quality appearance for the sample.

[0025] The first heating unit 6 and the second heating unit 7 can be implemented in various ways.

[0026] In one example, the first heating unit 6 and the second heating unit 7 can be heating wires or hot air blowers 29.

[0027] Example 2: Figures 1-8 As shown, unlike Embodiment 1, the conveying mechanism 8 includes a vertically arranged baffle plate 12, a placement platform 9, and an electric push rod 13. The electric push rod 13 is fixedly installed on the top of the drying chamber 1. The placement platform 9 extends horizontally from the lower part of the baffle plate 12 to carry the sample. The telescopic end of the electric push rod 13 is fixedly connected to the baffle plate 12 to drive the baffle plate 12 to move inside the drying chamber 1.

[0028] In one embodiment, the conveying mechanism 8 has the advantages of simple structure, high transmission efficiency, and reliable operation. The mechanism mainly consists of an electric push rod 13, a vertically arranged baffle plate 12, and a placement platform 9. The electric push rod 13 is fixedly installed on the top of the drying chamber 1. This arrangement keeps the driving component away from heat sources or potential debris at the bottom of the drying chamber, significantly improving its reliability and service life. The placement platform 9 extends horizontally from the lower part of the baffle plate 12 to support the sample. This design makes the vertical moving component, the baffle plate 12, and the horizontal supporting component, the placement platform 9, mechanically form a rigid whole, ensuring smooth movement.

[0029] The telescopic end of the electric push rod 13 is fixedly connected to the baffle plate 12. When the electric push rod 13 is working, its linear telescopic motion will directly and precisely drive the baffle plate 12 to slide inside the drying chamber 1. Since the placement platform 9 and the baffle plate 12 are fixed together, the placement platform 9 and the sample it carries will also move synchronously, thereby realizing automatic transfer between the preheating area 3 and the drying area 4.

[0030] In one embodiment, a guide groove 14 is provided on the surface of the drying chamber 1, and a guide block 15 is fixedly installed on the baffle plate 12. The guide block 15 is slidably connected in the guide groove 14.

[0031] In one embodiment, to further improve the smoothness of the operation of the conveying mechanism 8, a guide groove 14 is also provided on the surface of the drying chamber 1. Correspondingly, a guide block 15 can be fixedly installed on the baffle plate 12. The guide block 15 is slidably connected to the inner cavity of the guide groove 14. In this way, the guide groove 14 provides a fixed and precise movement track for the guide block 15. Since the baffle plate 12 is a large vertical moving component, it may shake or deviate when driven only by the electric push rod 13 at the top. By adding this guide structure, the movement of the baffle plate 12 is strictly constrained, so that it can only slide smoothly in a straight line along the path set by the guide groove 14. This effectively avoids shaking, deviating or jamming of the conveying mechanism 8 during operation, and significantly improves the reliability and stability of the entire conveying process.

[0032] In one embodiment, a first insulation plate 16 and a linkage mechanism 17 are also included. The first insulation plate 16 is rotatably disposed at the inlet hole 5 and is used to open and close the inlet hole 5. The linkage mechanism 17 is connected between the baffle plate 12 and the first insulation plate 16. The linkage mechanism 17 is used to simultaneously open the first insulation plate 16 when the baffle plate 12 drives the placement platform 9 through the inlet hole 5, and to close the first insulation plate 16 to seal the inlet hole 5 when the placement platform 9 is completely in the preheating zone 3 or the drying zone 4.

[0033] The purpose of this structure is to achieve automated synchronization of the conveying action and the opening and closing of the insulation door. When the baffle plate 12 drives the placement table 9 through the entry hole 5, the linkage mechanism 17 will simultaneously open the first insulation plate 16 to make way for the placement table 9. When the placement table 9 is completely in the preheating area 3 or the drying area 4, the linkage mechanism 17 will simultaneously close the first insulation plate 16.

[0034] In the present invention, the preheating zone 3 and the drying zone 4 are two independently temperature-controlled zones. Closing the first insulation plate 16 can effectively seal the inlet hole 5. This seal completely blocks air convection and heat exchange between the two temperature zones when the sample is in the preheating or drying stage, thereby ensuring the stability of the temperature of the preheating zone 3 and the drying zone 4 and preventing heat loss.

[0035] In one embodiment, the linkage mechanism 17 includes a connecting rod 18, a first gear 19, a first rack 20, a second gear 21, and a second rack 22. The first rack 20 is fixed to the baffle plate 12 via a connecting frame 23. The connecting rod 18 is rotatably mounted on the heat-insulating baffle plate 2. The first heat-insulating plate 16 is fixedly mounted on the connecting rod 18. The first gear 19 is coaxially fixedly mounted on the connecting rod 18, and the first gear 19 meshes with the first rack 20. The second gear 21 is rotatably mounted on the drying chamber 1. The second rack 22 is also fixed to the connecting frame 23 and is arranged parallel to the first rack 20. The second rack 22 also meshes with the second gear 21.

[0036] When the baffle plate 12 moves, the first rack 20 moves linearly accordingly, and the first rack 20 meshes with the first gear 19. This meshing will drive the first gear 19 to rotate, and drive the coaxial connecting rod 18 and the first insulation plate 16 to rotate together, thereby realizing the automatic opening and closing of the inlet hole 5.

[0037] The second rack 22 can be arranged parallel to the first rack 20, and the second gear 21 can be rotatably mounted on the drying chamber 1. The second rack 22 also meshes with the second gear 21. Its advantage lies in the fact that this parallel rack and pinion mechanism of the second gear 21 forms a high-precision movement guide. It works in conjunction with the rack and pinion mechanism of the first gear 19 to constrain the movement trajectory of the baffle 12. This ensures that the baffle 12 maintains a precise parallel state during movement, effectively preventing swaying or skew that may occur when large components move, making the entire conveying process more stable and reliable.

[0038] In one embodiment, the device further includes a rotating disk 24, a motor 25, a movable rod 26, a fourth gear 27, and a third gear 28. The rotating disk 24 is rotatably mounted on the placement platform 9 for carrying samples. The third gear 28 is fixedly installed at the bottom of the rotating disk 24. The motor 25 is fixedly installed at the bottom of the drying chamber 1. One end of the movable rod 26 is fixedly connected to the output end of the motor 25, and the other end extends into the drying area 4. The fourth gear 27 is fixedly installed at the other end of the movable rod 26 located in the drying area 4. When the placement platform 9 moves to the drying area 4, the third gear 28 and the fourth gear 27 mesh with each other, so that the motor 25 drives the rotating disk 24 to rotate.

[0039] When the placement table 9 moves to the drying area 4, the third gear 28 fixed to the bottom of its rotating disk 24 will move accordingly and mesh with the fourth gear 27 connected in the drying area 4. At this time, the motor 25 starts, and its power is transmitted to the third gear 28 through the movable rod 26 and the fourth gear 27, thereby driving the rotating disk 24 to rotate.

[0040] The advantage of the above design is that it changes static drying to dynamic drying. The sample rotates during the drying process to ensure that all parts of its surface are evenly exposed to air and heat, thereby effectively avoiding the difference in surface tension of the coating caused by drying one side too quickly. This keeps the paint layer of the sample uniform and further ensures the pass rate of drying.

[0041] In one example, to prevent the sample from tipping over or shifting during the rotation of the rotating disk 24, a fixing mechanism is provided on the surface of the rotating disk 24. The fixing mechanism can also be an anti-slip pad laid on the surface of the rotating disk 24. The anti-slip pad increases the friction between the sample base and the surface of the rotating disk 24, preventing the sample from sliding during slow rotation.

[0042] Example 3: Figures 1-8As shown, unlike Embodiment 2, the hot air circulation unit 10 includes a fan 29, an air box 30, an air outlet duct 31, a connecting box 32, a connecting pipe 33, and an air inlet duct 34. The fan 29 is used to provide air circulation power. One end of the air outlet duct 31 is connected to the drying area 4, and the other end is connected to the connecting box 32. A purification mechanism 11 is provided inside the connecting box 32. One end of the connecting pipe 33 is connected to the connecting box 32, and the other end is connected to the air inlet of the fan 29. The air outlet of the fan 29 is connected to the air inlet of the air box 30 through the air inlet duct 34. The air box 30 is set in the drying area 4, and several partition plates 35 are fixedly installed on the inner wall of the air box 30 to make the air evenly dispersed.

[0043] In the above structure, hot air is drawn from the drying area 4 through the exhaust duct 31 and guided to the connecting box 32. The purification mechanism 11 is located inside the connecting box 32, thereby ensuring that all circulating air must be forcibly passed through the purification mechanism 11 before being reused, thus filtering out dust and purifying harmful gases. The purified clean air enters the air inlet of the fan 29 through the connecting pipe 33. Subsequently, the fan 29 forces the clean hot air through the air inlet duct 34 into the air box 30 located in the drying area 4. Several partition plates 35 are also fixedly installed on the inner wall of the air box 30. The function of these partition plates 35 is to evenly disperse the incoming airflow and prevent strong winds from blowing directly onto the sample.

[0044] The advantage of the above structure is that it not only achieves efficient circulation of hot air, but more importantly, it ensures that the air used for drying is highly clean and evenly distributed, thus solving the problems of drying efficiency, uniformity and surface cleanliness at the same time.

[0045] In one embodiment, the purification mechanism 11 includes a dustproof net 36 and an activated carbon plate 37. The inner wall of the connecting box 32 has two placement slots 38 for respectively accommodating the dustproof net 36 and the activated carbon plate 37. The dustproof net 36 is slidably connected to the inner cavity of one of the placement slots 38, and the activated carbon plate 37 is slidably connected to the inner cavity of the other placement slot 38.

[0046] In one embodiment, the internal structure of the purification mechanism 11 implements a targeted dual filtration. The mechanism mainly includes a dustproof net 36 and an activated carbon plate 37. To install these two components, the inner wall of the connecting box 32 has two placement slots 38 for accommodating the dustproof net 36 and the activated carbon plate 37, respectively.

[0047] When hot air passes through the connecting box 32, it first passes through the dustproof net 36. The function of the dustproof net 36 is to intercept and filter dust particles in the air, which can effectively prevent the sample coating surface from developing pitting defects due to dust adhesion. Subsequently, the air will continue to pass through the activated carbon plate 37, which is used to adsorb and purify harmful gases volatilized during the drying process, preventing them from contaminating the coating or being emitted into the environment.

[0048] In addition, the structure has significant maintenance convenience. By sliding the dustproof net 36 and activated carbon plate 37 into the inner cavity of the placement tank 38, when the filter material fails or becomes clogged, the operator can easily pull them out and quickly replace them, ensuring the long-term purification performance of the device.

[0049] In one embodiment, a sealing door 39 is rotatably connected to the surface of the drying chamber 1 via a hinge 40, and an observation hole 41 is also provided on the surface of the drying chamber 1, with an insulated glass 42 embedded in the inner cavity of the observation hole 41.

[0050] In one embodiment, the surface of the drying chamber 1 is provided with a sealing door 39 and an observation hole 41. These two structures provide necessary operation and monitoring functions while ensuring the airtightness of the equipment.

[0051] The sealing door 39 is rotatably connected by the hinge 40. This structure provides a convenient channel for the insertion and removal of samples. Its sealing design is the basis for maintaining the temperature stability of the preheating zone 3 and the drying zone 4 and preventing heat loss, thus ensuring the airtightness of the process environment.

[0052] The observation hole 41 is located on the surface of the drying chamber 1. Its function is to allow the operator to observe the state of the sample in real time during the drying process without opening the sealing door 39. This design avoids heat loss and process interruption caused by opening the door for inspection, and ensures the continuity of the gradient preheating and drying process.

[0053] The inner cavity of the observation hole 41 is inlaid with heat-insulating glass 42. While providing a clear view, the heat-insulating glass 42 also serves as an effective thermal barrier, preventing heat from being lost through the hole.

[0054] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A drying and purification device for preventing coating cracking, comprising a drying chamber, characterized in that: The drying chamber is equipped with: A heat-insulating plate is provided, which divides the drying chamber into a preheating area and a drying area, and the heat-insulating plate is provided with an entry hole for the sample to pass through. A first heating unit is used to heat the drying area to a drying temperature; A second heating unit is used to heat the preheating zone to a preheating temperature lower than the drying temperature; A conveying mechanism, the conveying mechanism including a placement stage for carrying a sample, the conveying mechanism being used to drive the placement stage through the inlet hole, so that the sample moves between the preheating zone and the drying zone; A hot air circulation unit is used to circulate the air in the drying area to perform hot air drying on the sample; And a purification mechanism, which is disposed on the air circulation path of the hot air circulation unit, for filtering dust in the air and purifying harmful gases.

2. The drying and purification device for preventing coating cracking according to claim 1, characterized in that: The conveying mechanism includes a vertically arranged baffle, a placement platform, and an electric push rod. The electric push rod is fixedly installed on the top of the drying chamber. The placement platform extends horizontally from the bottom of the baffle and is used to carry the sample. The telescopic end of the electric push rod is fixedly connected to the baffle and is used to drive the baffle to move within the drying chamber.

3. The drying and purification device for preventing coating cracking according to claim 2, characterized in that: The surface of the drying chamber is provided with a guide groove, and a guide block is fixedly installed on the baffle plate. The guide block is slidably connected in the guide groove.

4. The drying and purification device for preventing coating cracking according to claim 2, characterized in that: It also includes a first insulation plate and a linkage mechanism. The first insulation plate is rotatably disposed at the inlet hole and is used to open and close the inlet hole. The linkage mechanism is connected between the shield and the first insulation plate. The linkage mechanism is used to simultaneously open the first insulation plate when the shield drives the placement platform through the inlet hole, and to close the first insulation plate to seal the inlet hole when the placement platform is completely in the preheating area or the drying area.

5. The drying and purification device for preventing coating cracking according to claim 4, characterized in that: The linkage mechanism includes a connecting rod, a first gear, a first rack, a second gear, and a second rack. The first rack is fixed to the baffle plate via a connecting frame. The connecting rod is rotatably mounted on the heat-insulating plate. The first heat-insulating plate is fixedly mounted on the connecting rod. The first gear is coaxially fixedly mounted on the connecting rod, and the first gear meshes with the first rack. The second gear is rotatably mounted on the drying chamber. The second rack is also fixed to the connecting frame and is parallel to the first rack. The second rack also meshes with the second gear.

6. The drying and purification device for preventing coating cracking according to claim 4, characterized in that: It also includes a rotating disk, a motor, a movable rod, a fourth gear, and a third gear. The rotating disk is rotatably mounted on the placement platform to carry the sample. The third gear is fixedly installed at the bottom of the rotating disk. The motor is fixedly installed at the bottom of the drying chamber. One end of the movable rod is fixedly connected to the output end of the motor, and the other end extends through the drying area. The fourth gear is fixedly installed at the other end of the movable rod located within the drying area. When the placement platform moves to the drying area, the third gear and the fourth gear mesh with each other, so that the motor drives the rotating disk to rotate.

7. The drying and purification device for preventing coating cracking according to claim 1, characterized in that: The hot air circulation unit includes a fan, an air box, an air outlet duct, a connecting box, a connecting pipe, and an air inlet duct. The fan provides air circulation power. One end of the air outlet duct is connected to the drying area, and the other end is connected to the connecting box. The purification mechanism is installed inside the connecting box. One end of the connecting pipe is connected to the connecting box, and the other end is connected to the air inlet of the fan. The air outlet of the fan is connected to the air inlet of the air box through the air inlet duct. The air box is located in the drying area, and several partitions are fixedly installed on the inner wall of the air box to distribute the air evenly.

8. The drying and purification device for preventing coating cracking according to claim 7, characterized in that: The purification mechanism includes a dustproof net and an activated carbon plate. The inner wall of the connecting box has two placement slots for respectively accommodating the dustproof net and the activated carbon plate. The dustproof net is slidably connected to the inner cavity of one of the placement slots, and the activated carbon plate is slidably connected to the inner cavity of the other placement slot.

9. The drying and purification device for preventing coating cracking according to claim 1, characterized in that: The surface of the drying chamber is connected to a sealed door via a hinge. The surface of the drying chamber is also provided with an observation hole, and the inner cavity of the observation hole is inlaid with heat-insulating glass.

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