Coating device for efficient centrifugal coating machine

Abstract

The utility model discloses a coating device for a high-efficiency centrifugal coating machine, which comprises a coating pan body, a rotary material door assembly, a cylinder, a roller, a positioning column and a proximity switch, the rotary material door assembly is arranged at a material inlet / outlet on the outer circumferential side wall of the coating pan body, the positioning column is arranged on the rear end face of the coating pan body, and the proximity switch is used for sensing the positioning column; the rotary material door assembly comprises a material door, a front rotating shaft, a first reinforcing plate, a support, a sleeve, an L-shaped support, a second reinforcing plate, a plug, a rectangular spring, a gasket, a damping rotating shaft, a V-shaped shifting fork and a barrier strip; the front rotating shaft and the damping rotating shaft are coaxially arranged at the front end and the rear end of one side edge of the material door and are rotatably connected with the coating pan body; the rollers are arranged on cylinder piston rods. The rotary material door assembly is arranged on the circumferential wall of the coating pan body, rotates along with the coating pan body and acts in cooperation with the positioning column, the proximity switch, the air cylinder and the idler wheels, automatic feeding and automatic discharging in the radial direction of the material door are achieved, and production efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of solid dosage film coating technology, and in particular to a coating device for a high-efficiency centrifugal coating machine. Background Technology

[0002] Currently, solid dosage form coating machines often adopt a batch intermittent production mode, which generally suffers from defects such as rough coating process, high energy consumption, low degree of automation, and difficulty in controlling product quality consistency.

[0003] The coating unit is the core component of the coating machine. Traditional coating units have the following drawbacks: 1. Both feeding and discharging are manually operated at a speed of 10-15 rpm, resulting in low production efficiency; 2. Traditional coating units have very thin, irregularly shaped guide vanes that penetrate the entire unit. As the coating pan rotates, these guide vanes to achieve fluidized coating. Each vane cannot be coated in one go, resulting in uneven coating thickness, low coating efficiency, and high cost; 3. Traditional coating units cannot achieve automatic feeding, and the reverse discharge takes a long time, resulting in low efficiency and low automation.

[0004] This patented high-efficiency centrifugal coating machine uses a coating device with automated control, automatic loading, and automatic unloading, greatly reducing manpower, material resources, and time. During coating, the main shaft drives the coating pan to rotate at high speed (up to 100 rpm), causing the solid dosage form tablets to adhere to the inner wall of the coating pan under centrifugal force, forming a tablet ring. At this time, a linear air knife located at the outer edge of the coating pan radially sprays a high-speed linear airflow into the coating pan, causing the annular tablet flow to become a continuous waterfall-like fluidization. The contact time between each surface of the tablet and the sprayed liquid in the spraying area is uniform, resulting in uniform coating thickness, high product quality consistency, and high production efficiency. Utility Model Content

[0005] To address the shortcomings of existing coating devices, which rely on manual operation for feeding and discharging and employ a batch-based intermittent production mode, resulting in rough coating processes, high energy consumption, low automation, and difficulty in controlling product quality consistency, this invention provides a high-efficiency centrifugal coating device. By installing a rotating material gate assembly on the circumferential wall of the coating pan body, which works in conjunction with a positioning column, proximity switch, cylinder, and rollers, the device achieves automatic radial feeding and discharging of the rotating material gate, significantly improving production efficiency. The rotating material gate uses a rectangular spring as a damping element, which has a longer lifespan compared to the traditional method of using threaded clamping for damping.

[0006] To achieve the above objectives, this utility model provides a coating device for a high-efficiency centrifugal coating machine, including a coating pan body. During operation, the coating pan body is rotated by a coating machine servo motor. The device is characterized by further including a rotating material gate assembly, a cylinder, rollers, a positioning column, and a proximity switch. The outer circumferential side wall of the coating pan body is provided with inlet and outlet ports. The rotating material gate assembly is located at the inlet and outlet ports on the coating pan body and is used to rotate and open the material gate to realize the feeding and discharging of the coated product. The positioning column is located on the rear end face of the coating pan body, and the proximity switch is located on the coating machine frame behind the coating pan body to sense the positioning column and realize the positioning of the coating pan body when feeding or discharging, so that the inlet and outlet ports can be accurately rotated to face the feeding or discharging position. The proximity switch is connected to the coating machine PLC control system.

[0007] The coating pan body is provided with a feed pipe at the upper end and a discharge pipe at the lower end;

[0008] The rotating feed gate assembly includes a feed gate, a front rotating shaft, a first reinforcing plate, a support, a sleeve, an L-shaped support, a second reinforcing plate, a screw plug, a rectangular spring, a washer, a damping rotating shaft, a V-shaped fork, and a stop bar. The front rotating shaft and the damping rotating shaft are coaxially disposed at the front and rear ends of one side of the feed gate. The first reinforcing plate is fixedly connected to the front panel of the coating pan body. One end of the support is disposed on the front side of the first reinforcing plate, and the other end has a first through hole. The front end of the front rotating shaft is inserted into the first through hole. The V-shaped fork is fixedly connected to the rear end of the damping rotating shaft, and the V-shaped fork has a V-shaped groove that matches the outer diameter of the roller. The sleeve is fitted onto the damping... The second reinforcing plate is fixedly connected to the rear plate of the coating pan body on the front side of the V-shaped fork at the rear end of the rotating shaft. One side of the L-shaped support is located on the rear side of the second reinforcing plate, and the other side is fixedly connected to the outer side of the sleeve. The washer, rectangular spring, and screw plug are sequentially sleeved on the outer side of the damping rotating shaft inside the sleeve from front to back. The outer circular surface of the front end of the screw plug is provided with an external thread, and the rear end of the sleeve is provided with an internal thread that mates with the screw plug. The screw plug and the sleeve are threadedly connected. The damping rotating shaft is provided with a radially outwardly extending flange in the middle, which is located on the front side of the washer inside the sleeve. The front rotating shaft, the damping rotating shaft, and the coating pan body are rotatably connected.

[0009] The baffle is semi-cylindrical with the cylindrical surface facing outwards, and half of the inner plane of the semi-cylindrical shape is fixedly connected to the middle of the opening side of the inlet and outlet.

[0010] When the coating pan is working, the material gate is fixed in the closed position by the compression force of the rectangular spring and the baffle, which prevents the material gate from opening outward under the action of centrifugal force and causing mechanical interference, thus playing a safety protection role.

[0011] The cylinder is located behind the coating pan body on the frame of the coating machine, the roller is located on the piston rod of the cylinder, and the cylinder is connected to the PLC control system of the coating machine.

[0012] When the coating pan body needs to be fed or discharged, rotate the coating pan body counterclockwise until the proximity switch senses the positioning post, so that the coating pan body stops at the position where the roller axis and the center line of the V-groove of the V-shaped fork are collinear. Start the cylinder to drive the roller to insert into the V-groove. Start the coating pan body to rotate clockwise again. The material gate opens into the coating pan body under the mutual movement of the roller and the V-shaped fork. As the coating pan body continues to rotate to the feeding or discharging position, the V-shaped fork will leave the roller. The material gate is fixed in the open position when the V-shaped fork leaves under the action of the rectangular spring compression force.

[0013] Furthermore, the front end of the front rotating shaft is cylindrical, and half of the rear end is cut off to form a semi-cylindrical shape. The cutting plane of the semi-cylindrical shape is fixedly connected to the front end of the outer side of the material gate.

[0014] The rear side of the flange on the damping shaft is cylindrical, and half of the front side of the flange is cut off to form a semi-cylindrical shape. The cutting plane of the semi-cylindrical shape is fixedly connected to the rear end of the outer side of the material gate.

[0015] Furthermore, the coating pan body includes a flange, a front panel, a mesh plate, a rear panel, and a support base. The mesh plate is an arc-shaped mesh plate. The front panel and the rear panel are respectively fixedly connected to the front end face and the rear end face of the mesh plate. The flange is coaxial with the mesh plate and is fixedly connected to the front panel. The support base is coaxial with the mesh plate and is fixedly connected to the rear panel.

[0016] Furthermore, both the mesh plate and the material gate are perforated mesh plates, with a plurality of evenly distributed arrays of waist-shaped mesh holes with an aspect ratio of 3 to 7:1 and a width of 2 to 3 mm along the circumference of the mesh plate. The diameter of the mesh plate is set to 350 mm to 500 mm and the length is 150 mm to 500 mm.

[0017] Furthermore, the inner wall of the coating pan body is provided with a number of semi-cylindrical guide columns evenly distributed in a circle. The semi-cylindrical surface of the guide column faces the inner cavity of the coating pan body, and the semi-cylindrical plane is fixedly connected to the inner wall of the mesh plate or material gate. The guide column and the generatrix of the cylindrical surface of the mesh plate or material gate form an angle of 30 to 70°.

[0018] Furthermore, the guide columns are provided in 4 to 8 groups, which are evenly distributed in a circle. Each group has two guide columns, which are symmetrically arranged on the front and rear inner sidewalls of the mesh plate to form a figure-eight shape.

[0019] Furthermore, the length of the guide column is set to 40-60mm, and the diameter is φ8-12mm.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] 1. This utility model sets a rotating material gate assembly on the circumferential wall of the coating pan body. As the coating pan body rotates, it works in conjunction with the positioning column, proximity switch, cylinder and roller to realize radial automatic feeding and automatic discharging of the rotating material gate, which greatly improves production efficiency.

[0022] 2. The rotating material gate of this utility model uses a rectangular spring as a damping element, which has a longer service life compared with the traditional method of generating damping by threaded clamping.

[0023] 3. The coating pan body of this utility model is provided with several semi-cylindrical guide columns evenly distributed in a circle, with the semi-cylindrical surfaces facing the inner cavity of the coating pan body. When the coating pan body rotates at high speed, the flakes attached to the inner wall of the coating pan body are more easily mixed left and right in the coating pan under the action of the air knife, thereby improving the uniformity of coating.

[0024] 4. The screen and material gate of this utility model are provided with several evenly distributed waist-shaped mesh holes. Compared with the traditional circular mesh holes of the same diameter, the waist-shaped mesh holes have a higher opening rate, lower system wind resistance, and higher drying efficiency after the uncoated sheet is coated. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the material gate when it is closed according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure when the material gate is opened according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the rotating material gate assembly structure according to an embodiment of the present utility model;

[0028] Figure 4 This is a cross-sectional view of the rotating material gate assembly along the axis of rotation in an embodiment of this utility model;

[0029] Figure 5 This is a schematic diagram of the coating pan body structure according to an embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the main structure of the coating pan body according to an embodiment of the present utility model;

[0031] Figure 7 for Figure 6 Schematic diagram of the AA section structure.

[0032] In the diagram: 1. Coating pan body, 101. Mesh plate, 102. Front panel, 103. Rear panel, 104. Flange, 105. Guide column, 106. Inlet / outlet, 107. First reinforcing plate, 108. Second reinforcing plate, 109. Support base, 110. Baffle, 111. Positioning column, 2. Rotary material gate assembly, 201. Material gate, 202. Front rotating shaft, 203. Support, 2031. First through hole, 204. Damping rotating shaft, 2041. Flange, 205. Sleeve, 206. Gasket, 207. Rectangular spring, 208. Plug, 209. V-shaped shift fork, 2091. V-shaped groove, 210. L-shaped support, 3. Roller. Detailed Implementation

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

[0034] like Figures 1 to 7 As shown, this utility model embodiment includes a coating pan body 1, a rotating material gate assembly 2, a cylinder, a roller 3, a positioning post 111, and a proximity switch. During operation, the coating pan body 1 is driven to rotate by the coating machine servo motor. The outer circumferential side wall of the coating pan body 1 is provided with an inlet / outlet 106. The rotating material gate assembly 2 is located at the inlet / outlet 106 on the coating pan body 1 and is used to rotate and open the material gate 201 to realize the feeding and discharging of the coated product. The positioning post 111 is located on the rear end face of the coating pan body 1. The proximity switch is located on the coating machine frame behind the coating pan body 1 and is used to sense the positioning post 111 to realize the positioning of the coating pan body 1 when it needs to feed or discharge, so that the inlet / outlet 106 can be accurately rotated to face the feeding or discharging position. The proximity switch is connected to the coating machine PLC control system.

[0035] The upper end of the coating pan body 1 is provided with a feed pipe, which connects with the inlet and outlet during feeding; the lower end is provided with a discharge pipe, which connects with the inlet and outlet.

[0036] The rotating material gate assembly 2 includes a material gate 201, a front rotating shaft 202, a first reinforcing plate 107, a support 203, a sleeve 205, an L-shaped support 210, a second reinforcing plate 108, a screw plug 208, a rectangular spring 207, a washer 206, a damping rotating shaft 204, a V-shaped fork 209, and a stop bar 110. The front rotating shaft 202 and the damping rotating shaft 204 are coaxially arranged at the front and rear ends of one side of the material gate 201. The first reinforcing plate 107 is welded and fixedly connected to the front panel 102 of the coating pot body. One end of the support 203 is located on the front side of the first reinforcing plate 107, and the other end is provided with a first through hole 2031. The front end of the front rotating shaft 202 is inserted into the first through hole 2031. The V-shaped fork 209 is fixedly connected to the rear end of the damping rotating shaft 204. The V-shaped fork 209 is provided with a V-shaped groove 2091 that matches the outer diameter of the roller 3. The sleeve 210... 05 is sleeved on the front side of the V-shaped shift fork 209 at the rear end of the damping shaft 204. The second reinforcing plate 108 is fixedly connected to the rear panel 103 of the coating pot body. One side of the L-shaped support 210 is located on the rear side of the second reinforcing plate 108, and the other side is fixedly connected to the outer side of the sleeve 205. The washer 206, the rectangular spring 207, and the screw plug 208 are sequentially sleeved on the outer side of the damping shaft 204 inside the sleeve 205 from front to back. The outer circle of the front end of the screw plug 208 is provided with an external thread, and the rear end of the sleeve 205 is provided with an internal thread that mates with the screw plug 208. The screw plug 208 is threadedly connected to the sleeve 205. The damping shaft 204 is provided with a radially outwardly extending flange 2041 in the middle. The flange 2041 is located on the front side of the washer 206 inside the sleeve 205. The front shaft 202, the damping shaft 204, and the coating pot body 1 are rotatably connected.

[0037] The baffle 110 is semi-cylindrical with the cylindrical surface facing outwards, and half of the inner plane of the semi-cylindrical shape is fixedly connected to the middle of the opening side of the inlet / outlet 106.

[0038] When the coating pan body 1 is working, the material gate 201 is fixed in the closed position under the compression force of the rectangular spring 207 and the baffle 110, which prevents the material gate 201 from opening outward under the action of centrifugal force and causing mechanical interference, thus playing a safety protection role.

[0039] The cylinder is located behind the coating pan body 1 on the frame of the coating machine, and the roller 3 is located on the piston rod of the cylinder. The cylinder is connected to the PLC control system of the coating machine.

[0040] When the coating pan body 1 needs to be fed or discharged, rotate the coating pan body 1 counterclockwise until the proximity switch senses the positioning post 111, so that the coating pan body 1 stops at the position where the axis of the roller 3 is collinear with the center line of the V-groove 2091 of the V-shaped fork 209. Start the cylinder to drive the roller 3 to insert into the V-groove 2091. Start the coating pan body 1 to rotate clockwise again. The material gate 201 opens under the mutual movement of the roller 3 and the V-shaped fork 209. The material gate 201 opens into the coating pan body 1. As the coating pan body 1 continues to rotate to the feeding position or the discharging position, the V-shaped fork 209 will leave the roller 3. The material gate 201 is fixed in the open position when the V-shaped fork 209 leaves under the compression force of the rectangular spring 207.

[0041] Furthermore, such as Figure 4 As shown, the front end of the front rotating shaft 202 is cylindrical, and half of the rear end is cut off to form a semi-cylindrical shape. The cutting plane of the semi-cylindrical shape is fixedly connected to the front end of the outer side of the material gate 201.

[0042] The rear side of the flange 2041 on the damping shaft 204 is cylindrical, and half of the front side of the flange 2041 is cut off to form a semi-cylindrical shape. The cut plane of the semi-cylindrical shape is fixedly connected to the rear end of the outer side of the material gate 201.

[0043] Furthermore, such as Figure 5 , Figure 6 , Figure 7 As shown, the coating pan body 1 includes a flange 104, a front panel 102, a mesh plate 101, a rear panel 103, and a support base 109. The mesh plate 101 is an arc-shaped mesh plate. The front panel 102 and the rear panel 103 are respectively fixedly connected to the front end face and the rear end face of the mesh plate 101. The flange 104 is coaxial with the mesh plate 101 and is fixedly connected to the front panel 102. The support base 109 is coaxial with the mesh plate 101 and is fixedly connected to the rear panel 103.

[0044] Furthermore, both the screen plate 101 and the material gate 201 are perforated screen plates. Several arrays of evenly distributed waist-shaped mesh holes with an aspect ratio of 5:1 and a width of 2mm are opened along the circumference of the screen plate 101. The diameter of the screen plate 101 is set to 444mm and the length is 160mm.

[0045] Waist-shaped mesh has a higher opening ratio and lower system air resistance compared to traditional circular mesh of the same diameter, which can improve the drying efficiency of coated sheets.

[0046] Furthermore, the inner wall of the coating pan body 1 is provided with 6 sets of semi-cylindrical guide columns 105 evenly distributed in a circle. Each set is provided with two guide columns 105. The two guide columns 105 are symmetrically arranged on the front and rear inner walls of the mesh plate 101, forming a figure-eight shape.

[0047] The semi-cylindrical surface of the guide column 105 faces the inner cavity of the coating pan body 1, and the semi-cylindrical plane is fixedly connected to the inner wall of the mesh plate 101 or the material gate 201. The guide column 105 and the generatrix of the cylindrical surface of the mesh plate 101 or the material gate 201 form a 60° angle.

[0048] The length of the guide column 105 is set to 53mm and the diameter is φ12mm.

[0049] The semi-cylindrical surface of the guide column 105 makes it easier for the flake rings attached to the inner wall of the coating pan body 1 to mix left and right in the coating pan under the action of the air knife, thereby improving the uniformity of coating.

[0050] The working method of this embodiment is as follows: The servo motor is started to drive the coating pan body 1 to rotate counterclockwise at a speed of 5 rpm. After the proximity switch receives the signal from the positioning column 111, the PLC control system controls the coating pan body 1 to stop rotating, so that the center line of the V-groove 2091 of the V-shaped fork 209 is collinear with the axis of the roller 3. The cylinder is started to drive the roller 3 to insert into the V-groove 2091. The servo motor is started again to drive the coating pan body 1 to rotate clockwise at a speed of 5 rpm to the upper feeding position to connect with the feeding pipe. During this period, the material gate 201 is located between the roller 3 and the V-shaped fork 209. Under the mutual movement of 09, the coating pan body 1 opens. After the V-shaped fork 209 leaves the roller 3, the material gate 201 is fixed in the open position when the V-shaped fork 209 leaves under the compression force of the rectangular spring 207, and feeding begins. After feeding is completed, the servo motor is started to drive the coating pan body 1 to rotate counterclockwise at a speed of 5 rpm for a certain angle. During the counterclockwise rotation, the V-shaped fork 209 and the roller 3 re-contact and re-separate. After separation, the material gate 201 closes, the coating pan body 1 stops rotating, and then the cylinder is started to drive the roller 3 to retract. Then the coating device performs coating according to the normal coating process. During the coating process, the speed of the coating pan body can reach 100 rpm. After coating is completed, the coating pan body 1 stops rotating and is ready to discharge. During discharge, the servo motor is started to drive the coating pan body 1 to rotate counterclockwise at 5 rpm. Once the proximity switch receives the signal from the positioning post 111, the coating pan body 1 stops rotating, causing the center line of the V-groove 2091 of the V-shaped fork 209 to be collinear with the axis of the roller 3. The cylinder is then activated to drive the roller 3 into the V-groove 2091. The servo motor is then started again to drive the coating pan body 1 to rotate clockwise at 5 rpm until it reaches the lower discharge position and connects with the discharge pipe. During this process, the material gate 201 is positioned between the roller 3 and the V-shaped fork 209. Under the mutual movement of 09, the coating pan body 1 opens. After the V-shaped fork 209 leaves the roller 3, the material gate 201 is fixed in the open position when the V-shaped fork 209 leaves under the compression force of the rectangular spring 207, and the material discharge begins. After the material discharge is completed, the servo motor is started again to drive the coating pan body 1 to rotate clockwise at a speed of 5 rpm to the upper feeding position to connect with the feeding pipe for feeding. This cycle repeats from the above feeding to discharging process, realizing automatic feeding and automatic discharging, which greatly improves production efficiency.

[0051] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A coating device for a high-efficiency centrifugal coating machine, comprising a coating pan body, wherein the coating pan body is driven to rotate by a servo motor of the coating machine during operation, characterized in that: It also includes a rotating material gate assembly, a cylinder, rollers, a positioning post, and a proximity switch. The outer circumferential side wall of the coating pan body is provided with an inlet and outlet. The rotating material gate assembly is located at the inlet and outlet of the coating pan body and is used to rotate and open the material gate to realize the feeding and discharging of the coated product. The positioning post is located on the rear end face of the coating pan body. The proximity switch is located on the coating machine frame behind the coating pan body and is used to sense the positioning post to realize the positioning of the coating pan body when it needs to feed or discharge, so that the inlet and outlet can be accurately rotated to face the feeding or discharging position. The proximity switch is connected to the coating machine PLC control system. The coating pan body is provided with a feed pipe at the upper end and a discharge pipe at the lower end; The rotating feed gate assembly includes a feed gate, a front rotating shaft, a first reinforcing plate, a support, a sleeve, an L-shaped support, a second reinforcing plate, a screw plug, a rectangular spring, a washer, a damping rotating shaft, a V-shaped fork, and a stop bar. The front rotating shaft and the damping rotating shaft are coaxially disposed at the front and rear ends of one side of the feed gate. The first reinforcing plate is fixedly connected to the front panel of the coating pan body. One end of the support is disposed on the front side of the first reinforcing plate, and the other end has a first through hole. The front end of the front rotating shaft is inserted into the first through hole. The V-shaped fork is fixedly connected to the rear end of the damping rotating shaft, and the V-shaped fork has a V-shaped groove that matches the outer diameter of the roller. The sleeve is fitted onto the damping... The second reinforcing plate is fixedly connected to the rear plate of the coating pan body on the front side of the V-shaped fork at the rear end of the rotating shaft. One side of the L-shaped support is located on the rear side of the second reinforcing plate, and the other side is fixedly connected to the outer side of the sleeve. The washer, rectangular spring, and screw plug are sequentially sleeved on the outer side of the damping rotating shaft inside the sleeve from front to back. The outer circular surface of the front end of the screw plug is provided with an external thread, and the rear end of the sleeve is provided with an internal thread that mates with the screw plug. The screw plug and the sleeve are threadedly connected. The damping rotating shaft is provided with a radially outwardly extending flange in the middle, which is located on the front side of the washer inside the sleeve. The front rotating shaft, the damping rotating shaft, and the coating pan body are rotatably connected. The baffle is semi-cylindrical with the cylindrical surface facing outwards, and half of the inner plane of the semi-cylindrical shape is fixedly connected to the middle of the opening side of the inlet and outlet. When the coating pan is working, the material gate is fixed in the closed position by the compression force of the rectangular spring and the baffle, which prevents the material gate from opening outward under the action of centrifugal force and causing mechanical interference, thus playing a safety protection role. The cylinder is located behind the coating pan body on the frame of the coating machine, the roller is located on the piston rod of the cylinder, and the cylinder is connected to the PLC control system of the coating machine.

2. The coating device for a high-efficiency centrifugal coating machine according to claim 1, characterized in that: The front end of the front rotating shaft is cylindrical, and half of the rear end is cut off to form a semi-cylindrical shape. The cut plane of the semi-cylindrical shape is fixedly connected to the front end of the outer side of the material gate. The rear side of the flange on the damping shaft is cylindrical, and half of the front side of the flange is cut off to form a semi-cylindrical shape. The cutting plane of the semi-cylindrical shape is fixedly connected to the rear end of the outer side of the material gate.

3. The coating device for a high-efficiency centrifugal coating machine according to claim 1, characterized in that: The coating pan body includes a flange, a front panel, a mesh plate, a rear panel, and a support base. The mesh plate is an arc-shaped mesh plate. The front panel and the rear panel are respectively fixedly connected to the front end face and the rear end face of the mesh plate. The flange is coaxial with the mesh plate and is fixedly connected to the front panel. The support base is coaxial with the mesh plate and is fixedly connected to the rear panel.

4. The coating device for a high-efficiency centrifugal coating machine according to claim 3, characterized in that: Both the mesh plate and the material gate are perforated mesh plates, with several arrays of evenly distributed waist-shaped mesh holes with an aspect ratio of 3 to 7:1 and a width of 2 to 3 mm along the circumference of the mesh plate. The diameter of the mesh plate is set to 350 mm to 500 mm and the length is 150 mm to 500 mm.

5. The coating device for a high-efficiency centrifugal coating machine according to claim 1, characterized in that: The inner wall of the coating pan body is provided with several semi-cylindrical guide columns evenly distributed in a circle. The semi-cylindrical surface of the guide column faces the inner cavity of the coating pan body. The semi-cylindrical plane is fixedly connected to the inner wall of the mesh plate or material gate. The guide column and the generatrix of the cylindrical surface of the mesh plate or material gate form an angle of 30 to 70°.

6. The coating device for a high-efficiency centrifugal coating machine according to claim 5, characterized in that: The guide columns are provided in 4 to 8 groups, which are evenly distributed in a circle. Each group has two guide columns, which are symmetrically arranged on the front and rear inner side walls of the mesh plate to form a figure-eight shape.

7. A coating device for a high-efficiency centrifugal coating machine according to claim 5 or 6, characterized in that: The length of the guide column is set to 40-60mm, and the diameter is φ8-12mm.

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