Tablet medicine coating machine and coating method

Abstract

The invention relates to the technical field of medicine manufacturing, and provides a tablet medicine coating machine which comprises a base, a mounting frame is fixedly connected to the top of the base, a rotating frame is rotatably connected to the inner side of the mounting frame, a loading mechanism is arranged at one end of the inner side of the rotating frame and comprises a first semicircular frame, and the first semicircular frame is rotatably connected to the inner side of the rotating frame; an inner container is arranged on the inner side of the semicircular frame I, the other end of the inner container is fixedly connected with a rotating shaft, the rotating shaft is rotationally connected with the side wall of the semicircular frame I, a plurality of through holes are formed in the outer wall of the inner container, a coating mechanism is arranged at the other end of the inner side of the rotating frame, a driving mechanism is arranged at one end of the base, and a linkage mechanism is arranged at the other end of the base. The inner container can move back and forth in the vertical direction, so that the positions of tablets are continuously changed, and the problem that local tablets cannot cover coating liquid due to accumulation of the tablets under the action of centrifugal force is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medicine manufacturing, and in particular to a tablet medicine coating machine and a coating method. Background Art

[0002] Tablet coating machines are widely used in pharmaceutical, chemical and food research institutes for sugar coating and polishing of tablets and pills. They are also used in the food industry for making candy pills or coating sugar-coated tablets. The polished sugar-coated tablets have a bright color, which can prevent the tablet chips from oxidizing and deteriorating, cover up the unpleasant taste of the tablet chips, and ease the dissolution process in the human stomach.

[0003] After searching, it was found that the Chinese patent publication number CN117205085A discloses "a tablet coating machine for pharmaceutical manufacturing, comprising a U-shaped plate, wherein slide grooves are provided on both sides of the U-shaped plate, and sliders are movably connected to the inner cavities of the slide grooves, and collecting boxes are provided on both sides of the U-shaped plate, and one side of the slider is fixedly connected to one side of the adjacent collecting box, and the side of the collecting box away from the U-shaped plate is fixedly connected to a pump body, and the side of the pump body away from the collecting box is fixedly connected to a fixed pipe, and the end of the fixed pipe away from the pump body is fixedly connected to an elastic pipe, and the inner cavity of the U-shaped plate is provided with a connecting semicircular frame, and the left and right sides of the connecting semicircular frame are plugged into the side walls of the inner cavity of the U-shaped plate, and the inner cavity of the connecting semicircular frame is provided with a limiting semicircular frame, and the inner cavity of the limiting semicircular frame is provided with an inner liner semicircular frame, and the left and right sides of the inner liner semicircular frame are plugged into the side walls of the inner cavity of the limiting semicircular frame, and an adjustment mechanism is provided on the top of the U-shaped plate, and supporting mechanisms are provided on the front and back sides of the U-shaped plate.

[0004] This type of patent sprays coating liquid onto the surface of the tablets through a nozzle to form a coating layer, but this type of patent has some technical defects; first, this patent drives the movable semicircular frame to rotate through a motor, so that the inner semicircular frame drives the tablets to perform centrifugal movement, and the tablets are piled up under the action of centrifugal force, resulting in the inability of some tablets to be covered with coating liquid; second, since the inner semicircular frame is a semi-closed structure, the coating liquid sprayed by the nozzle will accumulate inside the inner semicircular frame, which makes the local tablets in the inner semicircular frame immersed in the coating liquid, which causes these tablets to absorb too much water and break. In view of this, the present invention proposes a tablet medicine coating machine. Summary of the invention

[0005] The invention provides a tablet medicine coating machine and a coating method, which solves the problem in the prior art that the tablets are easily piled up under the action of centrifugal force, resulting in partial failure to be covered with coating liquid.

[0006] The technical solution of the present invention is as follows: A tablet medicine coating machine comprises a base, a mounting frame is fixedly connected to the top of the base, a rotating frame is rotatably connected to the inner side of the mounting frame, a loading mechanism is arranged at one end of the inner side of the rotating frame, the loading mechanism comprises a semicircular frame 1, the semicircular frame 1 is rotatably connected to the inner side of the rotating frame, an inner liner for placing tablets is arranged at the inner side of the semicircular frame 1, one end of the inner liner is rotatably connected to the inner wall of the semicircular frame 1, a rotating shaft is fixedly connected to the other end of the inner liner, the rotating shaft passes through the side wall of the semicircular frame 1 and extends to the outer side of the semicircular frame 1, the rotating shaft is rotatably connected to the side wall of the semicircular frame 1, a plurality of through holes are opened on the outer wall of the inner liner, and a plurality of the through holes are evenly distributed on the inner liner, a coating mechanism for spraying coating liquid into the inner liner is arranged at the other end of the inner side of the rotating frame, a driving mechanism for driving the rotating shaft to rotate is arranged at one end of the base, and a linkage mechanism for driving the rotating frame to reciprocate in the vertical direction by cooperating with the start of the driving mechanism is arranged at the other end of the base.

[0007] Preferably, a drain pipe for discharging the coating liquid is fixedly connected to the bottom of the semicircular frame 1, and a corresponding control valve is fixedly connected to the drain pipe.

[0008] Preferably, the coating mechanism comprises two cylinders, which are respectively fixedly connected to both sides of the rotating frame, and the output ends of the two cylinders are fixedly connected with sliders, which are slidably connected to the side walls of the rotating frame, and a semicircular frame 2 is fixedly connected between the two sliders, and a spray assembly for spraying coating liquid is arranged on the inner side of the semicircular frame 2, and a plurality of stirring assemblies for stirring the blades by cooperating with the rotation of the inner tank are arranged on the outer side of the semicircular frame 2, and the plurality of stirring assemblies are distributed at equal angles around the semicircular frame 2.

[0009] Preferably, slide grooves are provided on both sides of the rotating frame, and the two sliding blocks are slidably connected to the inner walls of the two slide grooves respectively.

[0010] Preferably, the liquid spray assembly includes a rotating seat, which is rotatably connected to the inner side of the semicircular frame 2, one end of the rotating seat is fixedly connected to a liquid guide tube that passes through the rotating seat, one end of the liquid guide tube is fixedly connected to a nozzle, the other end of the liquid guide tube is fixedly connected to a liquid inlet hose for introducing coating liquid, the inlet end of the liquid inlet hose is externally connected to a coating liquid supply device, and the bottom end of the semicircular frame 2 is provided with a top pressure piece that drives the rotating seat to reciprocate by cooperating with the reciprocating rotation of the rotating frame.

[0011] Preferably, the top pressure member includes a ring sleeved on the liquid guide tube, the ring is slidably connected to the liquid guide tube, the bottom end of the ring is hinged with a mounting plate, the bottom of the mounting plate is fixedly connected with a sliding rod, the sliding rod passes through the bottom wall of the semicircular frame 2 and extends to the bottom of the semicircular frame 2, the sliding rod is slidably connected to the bottom wall of the semicircular frame 2, the bottom end of the sliding rod is fixedly connected with a top block, the top of the base is fixedly connected with a limit seat which intermittently contacts the top block by cooperating with the reciprocating rotation of the rotating frame, the sliding rod is sleeved with a spring, the top end of the spring is welded to the mounting plate, and the bottom end of the spring is welded to the inner wall of the semicircular frame 2.

[0012] Preferably, the stirring assembly comprises an elastic rod arranged obliquely, one end of the elastic rod is fixedly connected to the outer wall of the semicircular frame 2, the other end of the elastic rod is fixedly connected to an elastic block, and the inner side of the elastic rod is fixedly connected to a stirring plate.

[0013] Preferably, the driving mechanism includes a fixing frame, which is fixedly connected to the top of the base, and a motor is fixedly installed on the top of the fixing frame. A universal coupling is provided between the output shaft of the motor and the rotating shaft, and the output shaft of the motor is fixedly connected to the rotating shaft through the universal coupling.

[0014] Preferably, the linkage mechanism includes gear 1, which is fixedly connected to the output shaft of the motor, and the top of the base is rotatably connected to a connecting shaft, one end of the connecting shaft is fixedly connected to gear 2 meshing with gear 1, and the other end of the connecting shaft is fixedly connected to a reciprocating screw, and a U-shaped frame is threadedly connected to the reciprocating screw, and connecting rods are hinged at both ends of the U-shaped frame, and the ends of the two connecting rods away from the U-shaped frame are respectively hinged to the two sides of the rotating frame.

[0015] The present invention also provides a tablet medicine coating method, which is implemented by a tablet medicine coating machine, and the specific steps are as follows:

[0016] S1: Before working, the tablets to be coated are placed inside the inner container inside the semicircular frame 1, and then the two cylinders are controlled to make the slider slide along the slide groove, so that the semicircular frame 2 and the semicircular frame 1 collide with each other, so that the spray component and the stirring component extend into the inner container;

[0017] S2: When working, the driving mechanism drives the rotating shaft to rotate, so that the inner container rotates, which makes the tablets inside the inner container perform centrifugal motion, and the spray component sprays the coating liquid into the inner container, and the stirring component stirs the tablets so that the coating liquid is evenly covered on the surface of the tablets;

[0018] S3: During the stirring process of the tablets, the through holes can speed up the air flow inside the liner, so that the coating liquid coated on the surface of the tablets can dry quickly to form a stable coating layer;

[0019] S4: Under the drive of the driving mechanism, the linkage mechanism drives the rotating frame to reciprocate in the vertical direction, which enables the rotating frame to drive the semicircular frame 1 and the semicircular frame 2 to reciprocate in the vertical direction, so that the inner liner can reciprocate in the vertical direction, so that the position of the tablets is constantly changed, avoiding the problem that the tablets are piled up under the action of centrifugal force, resulting in the inability of some tablets to be covered with coating liquid.

[0020] The working principle and beneficial effects of the present invention are as follows: by controlling two cylinders, the slider slides along the slide groove, so that the semicircular frame two contacts the semicircular frame one, and the liquid spraying component and the stirring component extend into the inner tank, and the driving mechanism drives the rotating shaft to rotate, so that the inner tank rotates, which makes the tablets inside the inner tank perform centrifugal motion, and the liquid spraying component sprays the coating liquid into the inner tank, and at the same time the stirring component stirs the tablets so that the coating liquid is evenly covered on the surface of the tablets, and the linkage mechanism drives the rotating frame to reciprocate in the vertical direction under the drive of the driving mechanism, so that the rotating frame drives the semicircular frame one and the semicircular frame two to reciprocate in the vertical direction, and the inner tank can reciprocate in the vertical direction, so that the position of the tablets changes continuously, and the problem of the tablets being unable to be covered with the coating liquid due to the accumulation of the tablets under the action of the centrifugal force is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figure 1 It is a structural schematic diagram of a tablet medicine coating machine of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the charging mechanism of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the coating mechanism of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the liquid spraying assembly of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the top pressure piece of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the stirring assembly of the present invention;

[0028] Figure 7 It is a structural schematic diagram of the driving mechanism of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the linkage mechanism of the present invention.

[0030] In the figure: 1, base; 2, mounting frame; 3, rotating frame; 4, loading mechanism; 41, semicircular frame 1; 42, liner; 43, through hole; 44, rotating shaft; 45, liquid discharge pipe; 5, coating mechanism; 51, cylinder; 52, slider; 53, semicircular frame 2; 54, slide; 55, liquid spraying assembly; 551, rotating seat; 552, liquid guide tube; 553, nozzle; 554, liquid inlet hose; 555, top pressure piece; 5551, sleeve ring; 5 552. Mounting plate; 5553. Sliding rod; 5554. Top block; 5555. Limit seat; 5556. Spring; 56. Stirring assembly; 561. Elastic rod; 562. Elastic block; 563. Stirring plate; 6. Driving mechanism; 61. Fixed frame; 62. Motor; 63. Universal coupling; 7. Linkage mechanism; 71. Gear 1; 72. Connecting shaft; 73. Gear 2; 74. Reciprocating screw; 75. U-shaped frame; 76. Connecting rod. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figures 1 to 8 As shown, this embodiment proposes a tablet medicine coating machine, including a base 1, a mounting frame 2 is fixedly connected to the top of the base 1, a rotating frame 3 is rotatably connected to the inner side of the mounting frame 2, a loading mechanism 4 is arranged at one end of the inner side of the rotating frame 3, the loading mechanism 4 includes a semicircular frame 41, the semicircular frame 41 is rotatably connected to the inner side of the rotating frame 3, an inner liner 42 for placing tablets is arranged on the inner side of the semicircular frame 41, one end of the inner liner 42 is rotatably connected to the inner wall of the semicircular frame 41, and the other end of the inner liner 42 is fixedly connected to a rotating shaft 44, the rotating shaft 44 passes through the side wall of the semicircular frame 41 and extends to the outer side of the semicircular frame 41, The rotating shaft 44 is rotatably connected to the side wall of the semicircular frame 41, and a plurality of through holes 43 are opened on the outer wall of the inner liner 42, and the plurality of through holes 43 are evenly distributed on the inner liner 42. A drain pipe 45 for discharging the coating liquid is fixedly connected to the bottom of the semicircular frame 41, and a corresponding control valve is fixedly connected to the drain pipe 45; the through holes 43 can guide the coating liquid sprayed into the inner liner 42 to avoid the problem of the coating liquid accumulating inside the inner liner 42 and soaking the local tablets, resulting in the damage of the tablets. At the same time, the through holes 43 can speed up the air flow inside the inner liner 42, so that the coating liquid coated on the surface of the tablets can be quickly dried to form a stable coating layer.

[0033] The other end of the inner side of the rotating frame 3 is provided with a coating mechanism 5 for spraying coating liquid into the inner liner 42. The coating mechanism 5 includes two cylinders 51, which are respectively fixedly connected to the two sides of the rotating frame 3. The output ends of the two cylinders 51 are fixedly connected with sliders 52. Both sides of the rotating frame 3 are provided with slide grooves 54. The two sliders 52 are respectively slidably connected to the inner walls of the two slide grooves 54. A semicircular frame 53 is fixedly connected between the two sliders 52. A spray assembly 55 for spraying coating liquid is provided on the inner side of the semicircular frame 53. A plurality of stirring assemblies 56 for stirring the blades by cooperating with the rotation of the inner liner 42 are provided on the outer side of the semicircular frame 53. The plurality of stirring assemblies 56 are distributed at equal angles around the semicircular frame 53. A driving mechanism 6 for driving the rotating shaft 44 to rotate is provided at one end of the base 1. A linkage mechanism 7 for driving the rotating frame 3 to reciprocate in the vertical direction by cooperating with the start of the driving mechanism 6 is provided at the other end of the base 1.

[0034] By controlling the two cylinders 51, the slider 52 slides along the slide groove 54, so that the semicircular frame 2 53 conflicts with the semicircular frame 1 41, and the spray component 55 and the stirring component 56 extend into the inner container 42. The driving mechanism 6 drives the rotating shaft 44 to rotate, so that the inner container 42 rotates, which makes the tablets inside the inner container 42 perform centrifugal motion, and the spray component 55 sprays the coating liquid into the inner container 42. At the same time, the stirring component 56 stirs the tablets so that the coating liquid is evenly covered on the surface of the tablets. Under the drive of the driving mechanism 6, the linkage mechanism 7 drives the rotating frame 3 to reciprocate in the vertical direction, which makes the rotating frame 3 drive the semicircular frame 1 41 and the semicircular frame 2 53 to reciprocate in the vertical direction, and the inner container 42 can reciprocate in the vertical direction, so that the position of the tablets changes continuously, avoiding the problem that the tablets are piled up under the action of centrifugal force and the local tablets cannot be covered with coating liquid.

[0035] Further, the liquid spraying assembly 55 includes a rotating seat 551, which is rotatably connected to the inner side of the semicircular frame 53, one end of the rotating seat 551 is fixedly connected to a liquid guide tube 552 that penetrates the rotating seat 551, one end of the liquid guide tube 552 is fixedly connected to a nozzle 553, and the other end of the liquid guide tube 552 is fixedly connected to a liquid inlet hose 554 for introducing coating liquid, and the inlet end of the liquid inlet hose 554 is externally connected to a coating liquid supply device, and the bottom end of the semicircular frame 53 is provided with a top pressure piece 555 that drives the rotating seat 551 to reciprocate by cooperating with the reciprocating rotation of the rotating frame 3, and the top pressure piece 555 includes a collar 5551 sleeved on the liquid guide tube 552, and the collar 5551 and the liquid guide tube 5 52 is slidingly connected, the bottom end of the ring 5551 is hinged with a mounting plate 5552, the bottom of the mounting plate 5552 is fixedly connected with a slide bar 5553, the slide bar 5553 passes through the bottom wall of the semicircular frame 53 and extends to the bottom of the semicircular frame 53, the slide bar 5553 is slidingly connected to the bottom wall of the semicircular frame 53, the bottom end of the slide bar 5553 is fixedly connected with a top block 5554, the top of the base 1 is fixedly connected with a limit seat 5555 which intermittently contacts the top block 5554 through the reciprocating rotation of the rotating frame 3, a spring 5556 is sleeved on the slide bar 5553, the top end of the spring 5556 is welded to the mounting plate 5552, and the bottom end of the spring 5556 is welded to the inner wall of the semicircular frame 53.

[0036] The coating liquid is introduced into the liquid inlet hose 554 through the coating liquid supply device, and then introduced into the nozzle 553 through the liquid guide tube 552 for spraying. Under the drive of the linkage mechanism 7, the rotating frame 3 reciprocates in the vertical direction, which makes the top block 5554 reciprocate in the vertical direction. When the top block 5554 moves downward and conflicts with the limit seat 5555, the top block 5554 is subjected to an upward reaction force and drives the slide bar 5553 to slide upward, which makes the slide bar 5553 apply an upward pressure to the mounting plate 5552, so that the ring 5551 is subjected to an upward thrust and drives the liquid guide tube 552 to drive the rotating seat 551 to rotate upward At this time, the spring 5556 is stretched to accumulate elastic potential energy. When the top block 5554 moves upward and disengages from the limit seat 5555, the spring 5556 releases the potential energy to make the slide bar 5553 slide downward, which makes the ring 5551 drive the liquid guide tube 552 to drive the rotating seat 551 to rotate downward. In this cycle, the rotating seat 551 will swing up and down inside the semicircular frame 53, so that the nozzle 553 can swing up and down in the inner liner 42, thereby expanding the spraying range of the nozzle 553 inside the inner liner 42, which makes the tablets inside the inner liner 42 can be covered with coating liquid over a large area, thereby improving work efficiency.

[0037] Further, the stirring assembly 56 includes an elastic rod 561 which is arranged obliquely, one end of the elastic rod 561 is fixedly connected to the outer wall of the semicircular frame 2 53, the other end of the elastic rod 561 is fixedly connected to an elastic block 562, and the inner side of the elastic rod 561 is fixedly connected to a stirring plate 563. When the semicircular frame 2 53 and the semicircular frame 1 41 collide, the elastic rod 561 extends into the inner liner 42, and the elastic block 562 can collide with the inner wall of the inner liner 42, and the driving mechanism 6 drives the rotating shaft 44 to rotate, so that the inner liner 42 rotates, which makes the inner liner 42 and the elastic block 562 rotate relative to each other, so that the elastic block 562 can stir the tablets inside the inner liner 42, so that the tablets are fully in contact with the coating liquid.

[0038] Furthermore, the driving mechanism 6 includes a fixing frame 61, which is fixedly connected to the top of the base 1, and a motor 62 is fixedly installed on the top of the fixing frame 61. A universal coupling 63 is provided between the output shaft of the motor 62 and the rotating shaft 44, and the output shaft of the motor 62 is fixedly connected to the rotating shaft 44 through the universal coupling 63. The universal coupling 63 is driven to rotate by the motor 62, which causes the rotating shaft 44 to rotate synchronously, and thus causes the inner tank 42 to rotate.

[0039] Furthermore, the linkage mechanism 7 includes a gear 71, which is fixedly connected to the output shaft of the motor 62. The top of the base 1 is rotatably connected to a connecting shaft 72, one end of the connecting shaft 72 is fixedly connected to a gear 2 73 meshing with the gear 71, and the other end of the connecting shaft 72 is fixedly connected to a reciprocating screw 74, and a U-shaped frame 75 is threadedly connected to the reciprocating screw 74. Both ends of the U-shaped frame 75 are hinged with connecting rods 76, and the ends of the two connecting rods 76 away from the U-shaped frame 75 are respectively hinged to the two sides of the rotating frame 3.

[0040] Working principle: When working, the tablets to be coated are placed inside the inner liner 42 inside the semicircular frame 1 41, and then the two cylinders 51 are controlled to make the slider 52 slide along the slide groove 54, so that the semicircular frame 2 53 conflicts with the semicircular frame 1 41, so that the nozzle 553 extends into the inner liner 42, and the universal coupling 63 is driven to rotate by the motor 62, which makes the rotating shaft 44 rotate synchronously, and also makes the inner liner 42 rotate, which makes the tablets inside the inner liner 42 perform centrifugal motion, and at the same time, the nozzle 553 sprays the coating liquid into the inner liner 42, and at the same time, the elastic block 562 can stir the tablets inside the inner liner 42, so that the tablets are fully in contact with the coating liquid;

[0041] The motor 62 drives the gear 1 71 to rotate at the same time, so that the gear 2 73 drives the connecting shaft 72 to rotate, which causes the reciprocating screw 74 to rotate, and the U-shaped frame 75 to reciprocate in the horizontal direction, so that the two connecting rods 76 drive the rotating frame 3 to reciprocate in the vertical direction, which makes the rotating frame 3 drive the semicircular frame 1 41 and the semicircular frame 2 53 to reciprocate in the vertical direction, and the inner liner 42 can reciprocate in the vertical direction, so that the position of the tablets is constantly changed, avoiding the problem that the tablets are piled up under the action of centrifugal force, resulting in the inability of some tablets to be covered with coating liquid.

[0042] The present invention also provides a tablet medicine coating method, which is implemented by a tablet medicine coating machine, and the specific steps are as follows:

[0043] S1: Before working, the tablets to be coated are placed inside the inner container 42 inside the semicircular frame 1 41, and then the two cylinders 51 are controlled to make the slider 52 slide along the slide groove 54, so that the semicircular frame 2 53 is in conflict with the semicircular frame 1 41, so that the spray component 55 and the stirring component 56 extend into the inner container 42;

[0044] S2: During operation, the driving mechanism 6 drives the rotating shaft 44 to rotate, so that the inner container 42 rotates, which causes the tablets inside the inner container 42 to perform centrifugal motion, and the spraying component 55 sprays the coating liquid into the inner container 42, while the stirring component 56 stirs the tablets so that the coating liquid is evenly covered on the surface of the tablets;

[0045] S3: During the stirring process of the tablets, the through holes 43 can speed up the air flow inside the inner container 42, so that the coating liquid coated on the surface of the tablets can be quickly dried to form a stable coating layer;

[0046] S4: Under the drive of the driving mechanism 6, the linkage mechanism 7 drives the rotating frame 3 to reciprocate in the vertical direction, so that the rotating frame 3 drives the semicircular frame 1 41 and the semicircular frame 2 53 to reciprocate in the vertical direction, and the inner liner 42 can reciprocate in the vertical direction, so that the position of the tablets is constantly changed, avoiding the problem that the tablets are piled up under the action of centrifugal force, resulting in the inability of some tablets to be covered with coating liquid.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tablet medicine coating machine, comprising a base (1), the top of which is fixedly connected to a mounting frame (2), characterized in that: The inner side of the mounting frame (2) is rotatably connected to a rotating frame (3), one end of the inner side of the rotating frame (3) is provided with a loading mechanism (4), the loading mechanism (4) comprises a semicircular frame (41), the semicircular frame (41) is rotatably connected to the inner side of the rotating frame (3), an inner liner (42) for placing tablets is provided on the inner side of the semicircular frame (41), one end of the inner liner (42) is rotatably connected to the inner wall of the semicircular frame (41), the other end of the inner liner (42) is fixedly connected to a rotating shaft (44), the rotating shaft (44) passes through the side wall of the semicircular frame (41) and extends to the inner side of the semicircular frame (41). 1), the rotating shaft (44) is rotatably connected to the side wall of the semicircular frame (41), the outer wall of the inner container (42) is provided with a plurality of through holes (43), and the plurality of through holes (43) are evenly distributed on the inner container (42), the other end of the inner side of the rotating frame (3) is provided with a coating mechanism (5) for spraying coating liquid into the inner container (42), one end of the base (1) is provided with a driving mechanism (6) for driving the rotating shaft (44) to rotate, and the other end of the base (1) is provided with a linkage mechanism (7) for driving the rotating frame (3) to reciprocate in the vertical direction by cooperating with the start of the driving mechanism (6).

2. A tablet medicine coating machine according to claim 1, characterized in that: A drain pipe (45) for discharging the coating liquid is fixedly connected to the bottom of the semicircular frame 1 (41), and a corresponding control valve is fixedly connected to the drain pipe (45).

3. A tablet medicine coating machine according to claim 1, characterized in that: The coating mechanism (5) comprises two cylinders (51), the two cylinders (51) are respectively fixedly connected to the two sides of the rotating frame (3), the output ends of the two cylinders (51) are fixedly connected with sliders (52), the two sliders (52) are slidably connected to the side walls of the rotating frame (3), a semicircular frame (53) is fixedly connected between the two sliders (52), a liquid spraying assembly (55) for spraying coating liquid is arranged on the inner side of the semicircular frame (53), and a plurality of stirring assemblies (56) for stirring the blades by cooperating with the rotation of the inner liner (42) are arranged on the outer side of the semicircular frame (53), and the plurality of stirring assemblies (56) are distributed at equal angles around the semicircular frame (53).

4. A tablet medicine coating machine according to claim 3, characterized in that: Slide grooves (54) are provided on both sides of the rotating frame (3), and the two sliding blocks (52) are respectively slidably connected to the inner walls of the two slide grooves (54).

5. A tablet medicine coating machine according to claim 3, characterized in that: The liquid spraying assembly (55) comprises a rotating seat (551), wherein the rotating seat (551) is rotatably connected to the inner side of the second semicircular frame (53), one end of the rotating seat (551) is fixedly connected to a liquid guide tube (552) penetrating the rotating seat (551), one end of the liquid guide tube (552) is fixedly connected to a nozzle (553), the other end of the liquid guide tube (552) is fixedly connected to a liquid inlet hose (554) for introducing coating liquid, the inlet end of the liquid inlet hose (554) is externally connected to a coating liquid supply device, and the bottom end of the second semicircular frame (53) is provided with a pressing piece (555) for driving the rotating seat (551) to reciprocate by cooperating with the reciprocating rotation of the rotating frame (3).

6. A tablet medicine coating machine according to claim 5, characterized in that: The pressing member (555) comprises a collar (5551) sleeved on the liquid guiding tube (552), the collar (5551) being slidably connected to the liquid guiding tube (552), a mounting plate (5552) being hingedly connected to the bottom end of the collar (5551), a sliding rod (5553) being fixedly connected to the bottom of the mounting plate (5552), the sliding rod (5553) penetrating the bottom wall of the semicircular frame (53) and extending to the bottom of the semicircular frame (53), the sliding rod (5553) being connected to the semicircular frame (53) and the mounting plate (5552) being hingedly connected to the bottom end of the collar (5551). The bottom wall of the semicircular frame (53) is slidably connected to the bottom wall of the semicircular frame (53), the bottom end of the sliding rod (5553) is fixedly connected to a top block (5554), the top of the base (1) is fixedly connected to a limit seat (5555) which intermittently contacts the top block (5554) by cooperating with the reciprocating rotation of the rotating frame (3), the sliding rod (5553) is sleeved with a spring (5556), the top end of the spring (5556) is welded to the mounting plate (5552), and the bottom end of the spring (5556) is welded to the inner wall of the semicircular frame (53).

7. A tablet medicine coating machine according to claim 3, characterized in that: The stirring assembly (56) comprises an elastic rod (561) arranged obliquely, one end of the elastic rod (561) being fixedly connected to the outer wall of the second semicircular frame (53), the other end of the elastic rod (561) being fixedly connected to an elastic block (562), and the inner side of the elastic rod (561) being fixedly connected to a stirring plate (563).

8. A tablet medicine coating machine according to claim 1, characterized in that: The driving mechanism (6) comprises a fixing frame (61), the fixing frame (61) is fixedly connected to the top of the base (1), a motor (62) is fixedly mounted on the top of the fixing frame (61), a universal coupling (63) is provided between the output shaft of the motor (62) and the rotating shaft (44), and the output shaft of the motor (62) and the rotating shaft (44) are fixedly connected via the universal coupling (63).

9. A tablet medicine coating machine according to claim 8, characterized in that: The linkage mechanism (7) comprises a gear 1 (71), wherein the gear 1 (71) is fixedly connected to the output shaft of the motor (62); the top of the base (1) is rotatably connected to a connecting shaft (72); one end of the connecting shaft (72) is fixedly connected to a gear 2 (73) meshing with the gear 1 (71); the other end of the connecting shaft (72) is fixedly connected to a reciprocating screw rod (74); a U-shaped frame (75) is threadedly connected to the reciprocating screw rod (74); both ends of the U-shaped frame (75) are hinged to connecting rods (76); and the ends of the two connecting rods (76) away from the U-shaped frame (75) are respectively hinged to the two sides of the rotating frame (3).

10. A tablet drug coating method, characterized in that: The tablet drug coating method is implemented by the tablet drug coating machine as described in any one of claims 1 to 9, and the specific steps are as follows; S1: Before operation, the tablets to be coated are placed inside the inner container (42) inside the semicircular frame 1 (41), and then the two cylinders (51) are controlled to make the slider (52) slide along the slide groove (54), so that the semicircular frame 2 (53) contacts the semicircular frame 1 (41), and the liquid spraying component (55) and the stirring component (56) extend into the inner container (42); S2: During operation, the driving mechanism (6) drives the rotating shaft (44) to rotate, so that the inner container (42) rotates, thereby causing the tablets inside the inner container (42) to perform centrifugal motion, and the liquid spraying component (55) sprays the coating liquid into the inner container (42), while the stirring component (56) stirs the tablets so that the coating liquid is evenly covered on the surface of the tablets; S3: During the stirring process of the tablets, the through holes (43) can accelerate the air flow inside the inner container (42), so that the coating liquid coated on the surface of the tablets can be quickly dried to form a stable coating layer; S4: Under the drive of the driving mechanism (6), the linkage mechanism (7) drives the rotating frame (3) to reciprocate in the vertical direction, so that the rotating frame (3) drives the semicircular frame 1 (41) and the semicircular frame 2 (53) to reciprocate in the vertical direction, and the inner container (42) can reciprocate in the vertical direction, so that the position of the tablets is constantly changed, thereby avoiding the problem that the tablets are piled up under the action of centrifugal force, resulting in the inability of some tablets to be covered with coating liquid.

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