Photosensitive drum surface base material coating equipment

Abstract

The utility model discloses photosensitive drum surface base material coating equipment, and belongs to the technical field of photosensitive drum coating. The coating equipment comprises a control unit, an immersion tank, an overflow cavity formed in the top end of the interior of the immersion tank, a storage tank formed in one side of the immersion tank, and an overflow pipe arranged between the immersion tank and the storage tank, wherein the two ends of the overflow pipe communicate with the interior of the overflow cavity and the interior of the storage tank correspondingly; the constant temperature structures are respectively arranged in the immersion tank and the storage tank; and two ends of the backflow structure are respectively communicated with the storage tank and the immersion tank. According to the photosensitive drum surface base material coating equipment, through the arrangement of the stirrer and the driving mechanism, liquid stored in the storage tank can be fully stirred and dispersed, so that liquid layering is reduced, and the liquid viscosity is ensured; meanwhile, the transmission structure and the spoiler are arranged, so that overflow liquid entering the overflow pipe can be dynamically dispersed and stirred in time, liquid layering is further reduced, and the viscosity uniformity and stability of the liquid are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of photosensitive drum coating, and particularly relates to a photosensitive drum surface base material coating device. BACKGROUND

[0002] In the production and manufacturing process of a photosensitive drum, coating of a surface base material is a crucial link. The quality of coating directly affects the imaging effect and service life of the photosensitive drum. In order to achieve high-quality coating, the design and optimization of a coating device are particularly important.

[0003] A Chinese utility model patent with the patent number CN217856989U discloses an organic photoconductor drum surface base material dip coating device. The overflow conduit is connected to the overflow cavity and the liquid storage tank, which can effectively ensure the balance of the dip coating liquid level, thereby ensuring the quality of product dip coating. However, after the dip coating liquid is stored in the liquid storage tank and left for a long time, due to the effect of gravity, different density components may be stratified, the heavier components may be deposited at the bottom, and the lighter components may float on the upper layer. This stratification phenomenon may cause uneven viscosity of the liquid and affect the coating effect.

[0004] Therefore, the application provides a photosensitive drum surface base material coating device to solve the above problems. UTILITY MODEL CONTENT

[0005] The application provides a photosensitive drum surface base material coating device, which aims to solve the problem that stratification caused by gravity after the existing dip coating liquid is left in the liquid storage tank for a long time may cause uneven viscosity of the liquid and affect the coating effect.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme: a photosensitive drum surface base material coating device, comprising a control unit, a submerged tank, an overflow cavity arranged at the top end inside the submerged tank, a storage tank arranged on one side of the submerged tank, an overflow pipe arranged between the submerged tank and the storage tank and communicating with the inside of the overflow cavity and the storage tank at both ends, a constant temperature structure arranged in the submerged tank and the storage tank respectively, and a backflow structure communicating with the storage tank and the submerged tank at both ends, a liquid level controller is fixedly arranged in the storage tank, the liquid level controller is connected with the input end of the control unit, and the constant temperature structure and the backflow structure are connected with the output end of the control unit.

[0007] The coating device further comprises a stirrer rotatably arranged in the storage tank for stirring the stored liquid, and a driving mechanism arranged on the storage tank for adjusting the height of the stirrer and driving the stirrer to rotate, and the driving mechanism is connected with the output end of the control unit.

[0008] The position corresponding to the overflow pipe in the storage tank is provided with a spoiler for dispersing the overflow liquid, and a transmission structure connected with the stirrer and the spoiler for rotating the spoiler; when the liquid level controller monitors the liquid level in the storage tank, the control unit can operate the drive mechanism, so that the stirrer can be kept below the normal liquid level for a long time, and the liquid stored in the storage tank can be fully stirred and dispersed to reduce the stratification of the liquid and ensure the viscosity of the liquid. At the same time, through the transmission structure and the spoiler, when the drive mechanism drives the stirrer to rotate, the spoiler can also rotate synchronously, so that the spoiler can timely and dynamically disperse and stir the overflow liquid entering the overflow pipe, thereby further reducing the stratification of the liquid and improving the uniformity and stability of the liquid viscosity.

[0009] Preferably, in order to ensure the temperature of the liquid in the immersion tank and the storage tank, the constant temperature structure comprises cooling cavities respectively arranged outside the inner walls of the immersion tank and the storage tank, water inlet pipes and water outlet pipes communicated with the cooling cavities, and coolers communicated with the water inlet pipes and the water outlet pipes, and the coolers are connected with the output end of the control unit; by arranging the cooling cavities and the water inlet pipes and the water outlet pipes connected with the coolers, the temperature of the liquid in the immersion tank and the storage tank can be accurately controlled.

[0010] Preferably, in order to reduce the sedimentation caused by temperature difference, the constant temperature structure further comprises heat insulation interlayers respectively arranged outside the cooling cavities in the immersion tank and the storage tank, and the heat insulation interlayers are filled with heat insulation materials; the heat insulation materials in the heat insulation interlayers can significantly reduce the heat exchange between the immersion tank and the storage tank and the external environment, so that the temperature of the liquid in the immersion tank and the storage tank can be maintained within the set range for a longer time, reducing the sedimentation phenomenon caused by temperature fluctuation, thereby improving the overall quality of the coating process.

[0011] Preferably, in order to facilitate the reflux of the overflow liquid in the storage tank to the immersion tank for recycling, the reflux structure comprises a reflux pipe fixedly arranged at the bottom end of the storage tank and communicated with the inside of the storage tank, a circulating pump arranged outside the storage tank and communicated with the end of the reflux pipe away from the storage tank, a liquid inlet pipe fixedly arranged at the end of the circulating pump away from the reflux pipe and communicated with the bottom end of the inside of the immersion tank, and a filter screen fixedly arranged at the end of the reflux pipe close to the storage tank, and the circulating pump is connected with the output end of the control unit; through the combination of the reflux pipe, the circulating pump and the liquid inlet pipe, the liquid overflowed into the storage tank can be easily refluxed to the immersion tank for recycling, which not only saves resources, but also maintains the stability of the liquid in the tank, and the setting of the filter screen can prevent impurities from entering the reflux system and protect the circulating pump and the immersion tank from damage.

[0012] Preferably, in order to realize the stirring of the liquid in the storage tank, the stirrer comprises a stirring shaft rotatably arranged in the storage tank corresponding to one side of the spoiler and a stirring paddle fixedly arranged at the bottom end of the stirring shaft and located at a position above the return pipe in the storage tank; through the rotation of the stirring shaft, the stirring paddle can generate vortex or shear force in the liquid, thereby ensuring that the liquid is fully mixed and dispersed, and such efficient stirring helps to prevent the liquid from stratifying, precipitating or forming solid particles, and maintains the uniformity and viscosity of the liquid.

[0013] Preferably, in order to realize the rotation of the stirring paddle below the normal liquid level for a long time and drive the rotation of the stirring shaft and the stirring paddle, the driving mechanism comprises a fixed frame fixedly arranged on the storage tank, a lifting groove opened on the fixed frame, a guide rod fixedly arranged in the lifting groove, a lifting plate longitudinally moving in the lifting groove and slidingly connected to the guide rod, and a cylinder fixedly arranged at the top end of the fixed frame for driving the lifting plate to move, one end of the stirring shaft away from the stirring paddle is rotatably connected to the lifting plate, and a motor for driving the rotation of the stirring shaft is fixedly installed on the lifting plate, and the motor and the cylinder are connected to the output end of the control unit; through the combination of the cylinder and the motor, the height adjustment and the rotation driving of the stirrer can be realized, and such design enables the stirrer to be below the normal liquid level for a long time, while accurate stirring operation can be performed as needed, in addition, the combination of the lifting groove, the guide rod and the lifting plate ensures the stability and accuracy of the stirrer during movement.

[0014] Preferably, in order to realize the transmission of the power of the stirrer, the transmission structure comprises a protection box fixedly arranged in the storage tank and located at a position above the spoiler, a sliding block slidingly connected to the outer side of the stirring shaft, a gear ring rotatably arranged in the protection box and fixedly connected to the side of the sliding block away from the stirring shaft, a transmission shaft penetrating the protection box and fixedly connected to the top end of the spoiler, and a gear fixedly sleeved on the transmission shaft and engaged with the gear ring, the gear is located in the protection box, the transmission shaft is rotatably connected to the protection box, the stirring shaft is provided with a sliding groove corresponding to the position of the sliding block, and the stirring shaft penetrates the protection box; such design can transmit the rotation power of the stirring shaft to the spoiler to make the spoiler rotate, without the need for additional power driving.

[0015] Preferably, in order to ensure the use of the tooth ring, the top end and the bottom end of the tooth ring are provided with annular grooves, support shafts are arranged in the annular grooves, the support shafts are slidingly arranged in the annular grooves, and the end of the support shaft away from the support shaft is fixedly connected with the protection box. The arrangement of the annular grooves and the support shafts provides support and positioning for the tooth ring. When the stirring shaft is lifted, the support of the support shaft can ensure that the tooth ring does not move synchronously with the lifting of the stirring shaft. When the stirring shaft rotates, the tooth ring can rotate with the rotation of the stirring shaft, thereby ensuring the stability and reliability of the transmission structure.

[0016] The photosensitive drum surface base material coating equipment is provided with a stirrer and a driving mechanism. When the liquid level controller monitors the liquid level in the storage tank, the control unit can operate the driving mechanism to not only make the stirrer be below the normal liquid level for a long time, but also make the liquid stored in the storage tank be fully stirred and dispersed to reduce liquid stratification and ensure the viscosity of the liquid.

[0017] The photosensitive drum surface base material coating equipment is provided with a transmission structure and a spoiler. When the driving mechanism drives the stirrer to rotate, the spoiler can be driven to rotate synchronously, so that the spoiler can timely and dynamically disperse and stir the overflow liquid entering the overflow pipe, thereby further reducing liquid stratification and ensuring the stability of the viscosity of the liquid. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of a photosensitive drum surface base material coating equipment in Example 1.

[0019] Figure 2 It is a sectional view of a photosensitive drum surface base material coating equipment in Example 1.

[0020] Figure 3 It is a sectional view of a storage tank in Example 1.

[0021] Figure 4 It is a sectional view of a transmission structure in Example 1.

[0022] Figure 5 It is a structural schematic view of a photosensitive drum surface base material coating equipment in Example 2.

[0023] In the drawings:

[0024] 1, immersion tank; 11, overflow chamber;

[0025] 2, storage tank; 21, liquid level controller;

[0026] 3, overflow pipe;

[0027] 4, constant temperature structure; 41, cooling chamber; 42, water inlet pipe; 43, water outlet pipe; 44, cooler; 45, heat preservation interlayer.

[0028] 5. Reflux structure; 51. Reflux pipe; 52. Circulation pump; 53. Inlet pipe; 54. Filter screen;

[0029] 6. Agitator; 61. Agitator shaft; 611. Slide groove; 62. Agitator paddle;

[0030] 7. Drive mechanism; 71. Fixing frame; 72. Lifting groove; 73. Lifting plate; 74. Cylinder; 75. Guide rod; 76. Motor;

[0031] 8. Transmission structure; 81. Protective box; 82. Slider; 83. Gear ring; 831. Annular groove; 832. Support shaft; 84. Gear; 85. Drive shaft;

[0032] 9. Spoiler. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Example 1

[0035] This embodiment provides a photosensitive drum surface substrate coating device, such as... Figures 1-4 As shown, the coating equipment includes a control unit, an immersion tank 1, an overflow cavity 11 located at the top of the immersion tank 1, a storage tank 2 located on one side of the immersion tank 1, an overflow pipe 3 located between the immersion tank 1 and the storage tank 2 with its two ends connected to the overflow cavity 11 and the storage tank 2 respectively, a constant temperature structure 4 located in the immersion tank 1 and the storage tank 2 respectively, and a reflux structure 5 located with its two ends connected to the storage tank 2 and the immersion tank 1 respectively. A liquid level controller 21 is fixedly installed in the storage tank 2 and is connected to the input end of the control unit. The constant temperature structure 4 and the reflux structure 5 are both connected to the output end of the control unit. The coating equipment also includes a stirrer 6 rotatably installed in the storage tank 2 for stirring the stored liquid, and a drive mechanism 7 installed on the storage tank 2 for adjusting the height of the stirrer 6 and driving the stirrer 6 to rotate. The drive mechanism 7 is connected to the output end of the control unit. A baffle 9 for dispersing the overflow liquid is installed in the storage tank 2 at the position corresponding to the overflow pipe 3, and a transmission structure 8 is installed in connection with the stirrer 6 and the baffle 9 for rotating the baffle 9.

[0036] In use, the photosensitive drum to be coated is placed in the immersion tank 1 for immersion coating, however, when the photosensitive drum to be coated is placed in the immersion tank 1 again, the excess coating liquid in the immersion tank 1 will flow to the overflow pipe 3 through the overflow chamber 11, and then to the storage tank 2 for storage, at the same time, the liquid level controller 21 in the storage tank 2 will monitor the liquid level height in the storage tank 2 and send a signal to the control unit, after receiving the signal of the liquid level controller 21, the control unit will start the driving mechanism 7 to drive the agitator 6 to lift and make the agitator 6 below the liquid level, after adjustment, the control unit will continue to start the driving mechanism 7 to drive the agitator 6 to rotate, so that the agitator 6 stirs the liquid in the storage tank 2 to ensure the viscosity of the liquid in the storage tank 2, since the transmission structure 8 is connected with the agitator 6, when the agitator 6 rotates, the baffle 9 can timely disperse and stir the overflow liquid entering the overflow pipe 3 through the transmission of the transmission structure 8, and in the coating process, the temperature of the liquid in the immersion tank 1 and the storage tank 2 can be maintained within the set range by operating the thermostat structure 4 through the control unit, at the same time, the liquid stored in the storage tank 2 can be circulated and used by starting the backflow structure 5 through the control unit.

[0037] Specifically, the thermostat structure 4 includes cooling chambers 41 arranged on the outer sides of the inner walls of the immersion tank 1 and the storage tank 2 respectively, water inlet pipes 42 and water outlet pipes 43 communicating with the corresponding cooling chambers 41, and coolers 44 communicating with the water inlet pipes 42 and the water outlet pipes 43, the coolers 44 are connected with the output end of the control unit;

[0038] In the coating process, the cooling medium is introduced into the cooling chambers 41 through the water inlet pipes 42, in the cooling chambers 41, the cooling medium exchanges heat with the inner walls of the immersion tank 1 and the storage tank 2, absorbs the heat released by the coating liquid in the immersion tank 1 and the storage tank 2, and the heated cooling medium is discharged from the cooling chambers 41 through the water outlet pipes 43 and enters the coolers 44 for cooling, and in this process, when the outlet temperature is too high, the control unit will issue an instruction to increase the working power of the cooler 44 or reduce the flow of the water inlet pipe 42 to reduce the temperature of the cooling medium, on the contrary, when the outlet temperature is too low, the control unit will correspondingly reduce the working power of the cooler 44 or increase the flow of the water inlet pipe 42, by continuously circulating and adjusting the temperature of the cooling medium, the thermostat structure 4 can ensure that the temperature of the coating liquid in the immersion tank 1 and the storage tank 2 always remains within the set range.

[0039] Further, the backflow structure 5 comprises a backflow pipe 51 fixedly arranged at the bottom end of the storage tank 2 and communicating with the inside of the storage tank 2, a circulating pump 52 arranged outside the storage tank 2 and communicating with the end of the backflow pipe 51 away from the storage tank 2, a liquid inlet pipe 53 fixedly arranged at the end of the circulating pump 52 away from the backflow pipe 51 and communicating with the bottom end of the inside of the immersion tank 1, and a filter screen 54 fixedly arranged at the end of the backflow pipe 51 close to the storage tank 2, and the circulating pump 52 is connected to the output end of the control unit;

[0040] When the immersion tank 1 lacks a certain amount of coating liquid and the storage tank 2 needs to be backflowed, the control unit receives a start signal, and the circulating pump 52 starts to work. At this time, the circulating pump 52 generates a certain suction force to suck the liquid in the storage tank 2 into the pump body through the backflow pipe 51, and then pressurizes the liquid and delivers it back to the immersion tank 1 through the liquid inlet pipe 53 for circulation. Before entering the backflow pipe 51, the liquid in the storage tank 2 is filtered by the filter screen 54 to ensure that the liquid entering the circulation system is clean.

[0041] In order to realize the stirring of the liquid in the storage tank 2, the stirrer 6 comprises a stirring shaft 61 rotatably arranged in the storage tank 2 corresponding to one side of the spoiler 9 and a stirring paddle 62 fixedly arranged at the bottom end of the stirring shaft 61 and located above the backflow pipe 51 in the storage tank 2. Through the rotation of the stirring shaft 61, the stirring paddle 62 can generate vortex or shear force in the liquid, thereby ensuring that the liquid is fully mixed and dispersed. This efficient stirring helps to prevent the liquid from stratifying, precipitating or forming solid particles, and maintains the uniformity and viscosity of the liquid.

[0042] Further, the driving mechanism 7 comprises a fixed frame 71 fixedly arranged on the storage tank 2, a lifting groove 72 opened on the fixed frame 71, a guide rod 75 fixedly arranged in the lifting groove 72, a lifting plate 73 longitudinally moving in the lifting groove 72 and slidingly connected to the guide rod 75, and a gas cylinder 74 fixedly arranged at the top end of the fixed frame 71 for driving the lifting plate 73 to move. The end of the stirring shaft 61 away from the stirring paddle 62 is rotatably connected to the lifting plate 73, and a motor 76 for driving the stirring shaft 61 to rotate is fixedly installed on the lifting plate 73. The motor 76 and the gas cylinder 74 are connected to the output end of the control unit;

[0043] When the control unit receives the signal of the liquid level controller 21 and issues an instruction, the air cylinder 74 starts to work, and then the piston rod of the air cylinder 74 performs the extension and retraction movement and pushes or pulls the lifting plate 73 to move longitudinally along the guide rod 75 in the lifting groove 72. With the lifting plate 73 moving up and down, it will synchronously drive the lifting of the stirring shaft 61 connected thereto, so as to realize the position adjustment of the stirring shaft 61 in the vertical direction, so that the stirring paddle 62 can be kept below the liquid level for a long time. When the lifting plate 73 moves and drives the stirring paddle 62 to the predetermined position, the control unit will continue to issue an instruction to start the motor 76. At this time, the motor 76 starts to work and drives the stirring shaft 61 to rotate. Then the rotation of the stirring shaft 61 drives the rotation of the stirring paddle 62, so as to realize the stirring operation of the liquid.

[0044] Further, the transmission structure 8 comprises a protection box 81 fixedly arranged in the storage tank 2 and located above the spoiler 9, a sliding block 82 slidingly connected to the outer side of the stirring shaft 61, a gear ring 83 rotatably arranged in the protection box 81 and fixedly connected to the side of the sliding block 82 away from the stirring shaft 61, a transmission shaft 85 penetrating the protection box 81 and fixedly connected to the top end of the spoiler 9, and a gear 84 fixedly sleeved on the transmission shaft 85 and engaged with the gear ring 83. The gear 84 is located in the protection box 81, and the transmission shaft 85 is rotatably connected to the protection box 81. The stirring shaft 61 is provided with a sliding groove 611 at the position corresponding to the sliding block 82, and the stirring shaft 61 penetrates the protection box 81.

[0045] When the motor 76 drives the stirring shaft 61 to rotate and the stirring paddle 62 stirs the liquid in the storage tank 2, the gear ring 83 fixedly connected to the sliding block 82 also rotates synchronously through the connection of the sliding block 82. Then, the rotation of the gear ring 83 will synchronously drive the rotation of the engaged gear 84. With the rotation of the gear 84, the transmission shaft 85 will also drive the spoiler 9 to rotate synchronously. Therefore, when the overflow liquid enters the storage tank 2 from the overflow pipe 3, it can be dispersed and stirred in time under the rotating disturbance of the spoiler 9, further improving the uniformity and viscosity of the liquid stirring.

[0046] In addition, in order to ensure the use of the gear ring 83, annular grooves 831 are formed at the top end and the bottom end of the gear ring 83, and support shafts 832 are arranged in the annular grooves 831. The support shafts 832 are slidingly arranged in the annular grooves 831, and the ends of the support shafts 832 away from the support shafts 832 are fixedly connected to the protection box 81. The arrangement of the annular grooves 831 and the support shafts 832 provides support and positioning for the gear ring 83. During the lifting of the stirring shaft 61, the support of the support shafts 832 can ensure that the gear ring 83 will not move synchronously with the lifting of the stirring shaft 61. At the same time, during the rotation of the stirring shaft 61, it can ensure that the gear ring 83 can rotate with the rotation of the stirring shaft 61, thereby ensuring the stability and reliability of the transmission structure 8.

[0047] Example 2

[0048] Different from the embodiment 1, as shown in Figure 5 In order to reduce the settlement caused by temperature difference, the constant temperature structure 4 further comprises a heat insulation interlayer 45 arranged in the immersion tank 1 and the storage tank 2 respectively corresponding to the outside of the cooling cavity 41, and the heat insulation interlayer 45 is filled with heat insulation material. The heat insulation material in the heat insulation interlayer 45 can significantly reduce the heat exchange between the immersion tank 1 and the storage tank 2 and the external environment, so that the temperature of the liquid in the immersion tank 1 and the storage tank 2 can be maintained in the set range for a longer time, reducing the settlement phenomenon caused by temperature fluctuation, thereby improving the overall quality of the coating process.

[0049] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A photosensitive drum surface base material coating device, comprising a control unit, an immersion tank (1), an overflow chamber (11) arranged at the top end inside the immersion tank (1), a storage tank (2) arranged at one side of the immersion tank (1), an overflow pipe (3) arranged between the immersion tank (1) and the storage tank (2) and communicating with the inside of the overflow chamber (11) and the storage tank (2) at both ends, a constant temperature structure (4) arranged in the immersion tank (1) and the storage tank (2) respectively, and a backflow structure (5) communicating with the storage tank (2) and the immersion tank (1) at both ends, a liquid level controller (21) is fixedly arranged in the storage tank (2), the liquid level controller (21) is connected with the input end of the control unit, and the constant temperature structure (4) and the backflow structure (5) are connected with the output end of the control unit. characterized in that The coating device further comprises an agitator (6) rotatably arranged in the storage tank (2) for stirring the storage liquid, and a driving mechanism (7) arranged on the storage tank (2) for adjusting the height of the agitator (6) and driving the agitator (6) to rotate, and the driving mechanism (7) is connected with the output end of the control unit. A turbulence plate (9) for dispersing overflow liquid is arranged at the position corresponding to the overflow pipe (3) in the storage tank (2), and a transmission structure (8) connected with the agitator (6) and the turbulence plate (9) is arranged for rotating the turbulence plate (9).

2. The photosensitive drum surface substrate coating apparatus according to claim 1, characterized by: The constant temperature structure (4) comprises cooling chambers (41) arranged outside the inner walls of the immersion tank (1) and the storage tank (2) respectively, water inlet pipes (42) and water outlet pipes (43) communicating with the cooling chambers (41), and coolers (44) communicating with the water inlet pipes (42) and the water outlet pipes (43), and the coolers (44) are connected with the output end of the control unit.

3. The photosensitive drum surface substrate coating apparatus according to claim 2, wherein: The constant temperature structure (4) further comprises heat-insulating interlayers (45) arranged outside the cooling chambers (41) in the immersion tank (1) and the storage tank (2) respectively, and the heat-insulating interlayers (45) are filled with heat-insulating materials.

4. The photosensitive drum surface substrate coating apparatus according to claim 2, wherein: The backflow structure (5) comprises a backflow pipe (51) fixedly arranged at the bottom end of the storage tank (2) and communicating with the inside of the storage tank (2), a circulating pump (52) arranged outside the storage tank (2) and communicating with one end of the backflow pipe (51) away from the storage tank (2), a liquid inlet pipe (53) fixedly arranged at one end of the circulating pump (52) away from the backflow pipe (51) and communicating with the bottom end inside the immersion tank (1), and a filter screen (54) fixedly arranged at one end of the backflow pipe (51) close to the storage tank (2), and the circulating pump (52) is connected with the output end of the control unit.

5. The photosensitive drum surface substrate coating apparatus according to claim 4, wherein: The agitator (6) comprises an agitator shaft (61) rotatably arranged in the storage tank (2) at the side corresponding to the turbulence plate (9), and an agitator paddle (62) fixedly arranged at the bottom end of the agitator shaft (61) and located above the position of the backflow pipe (51) in the storage tank (2).

6. The photosensitive drum surface substrate coating apparatus according to claim 5, wherein: The driving mechanism (7) comprises a fixing frame (71) fixedly arranged on the storage tank (2), a lifting groove (72) opened on the fixing frame (71), a guide rod (75) fixedly arranged in the lifting groove (72), a lifting plate (73) longitudinally moving in the lifting groove (72) and slidingly connected with the guide rod (75), and a cylinder (74) fixedly arranged at the top end of the fixing frame (71) and used for driving the lifting plate (73) to move, one end of the stirring shaft (61) away from the stirring paddle (62) is rotatably connected with the lifting plate (73), and the lifting plate (73) is fixedly installed with a motor (76) used for driving the stirring shaft (61) to rotate, and the motor (76) and the cylinder (74) are connected with the output end of the control unit.

7. The photosensitive drum surface substrate coating apparatus according to claim 6, wherein: The transmission structure (8) comprises a protection box (81) fixedly arranged in the storage tank (2) and located above the spoiler (9), a sliding block (82) slidingly connected with the outer side of the stirring shaft (61), a gear ring (83) rotatably arranged in the protection box (81) and fixedly connected with the sliding block (82) away from the stirring shaft (61), a transmission shaft (85) penetrating through the protection box (81) and fixedly connected with the top end of the spoiler (9), and a gear (84) fixedly sleeved on the transmission shaft (85) and engaged with the gear ring (83), the gear (84) is located in the protection box (81), the transmission shaft (85) is rotatably connected with the protection box (81), the stirring shaft (61) is provided with a sliding groove (611) corresponding to the position of the sliding block (82), and the stirring shaft (61) penetrates through the protection box (81).

8. The photosensitive drum surface substrate coating apparatus according to claim 7, wherein: The top end and the bottom end of the gear ring (83) are provided with annular grooves (831), support shafts (832) are arranged in the annular grooves (831), the support shafts (832) slidingly arranged in the annular grooves (831), and one end of the support shaft (832) away from the support shaft (832) is fixedly connected with the protection box (81).

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