A continuous coating machine

Abstract

A continuous coating machine includes a frame, a coating cylinder rotating at the upper end of the frame, and a spray gun located in the coating cylinder, and also includes: a support mechanism located at the center of the lower end of the frame, the lower end of the frame is hinged to the support mechanism; a lifting mechanism installed below the frame and located at the feeding end of the coating cylinder, which can drive the frame to move up and reset; a reset mechanism installed below the frame and located at the discharging end of the coating cylinder, which can drive the frame to move down and reset, the lifting mechanism and the reset mechanism are linked and cooperate with the support mechanism to make the frame swing toward the discharging end of the coating cylinder, and the upward movement distance of the lifting mechanism is less than the downward movement distance of the reset mechanism. The present invention realizes the rapid adjustment of the frame to tilt toward the discharging end of the coating cylinder by linking the lifting mechanism and the reset mechanism and driving the synchronous same-direction swing, and realizes the continuity of coating in this way, which is more convenient.

Description

Technical Field

[0001] The invention relates to pharmaceutical machinery and equipment, in particular to a continuous coating machine. Background Art

[0002] The coating machine is suitable for the pharmaceutical, chemical, food and other industries. It is an efficient, energy-saving, safe and clean mechatronic equipment that can be used for organic film coating, water-soluble film coating, slow-release and controlled-release coating of tablets, pills, candies, etc. The structure of the efficient coating machine mainly includes a frame and a drum. The drum is placed horizontally on the frame, and the axial ends of the drum are also provided with conical necking. When in use, the product is placed in the drum and rotates with the drum. At this time, people introduce hot air into the drum, so that the coating medium sprayed on the surface of the product is dried quickly and evenly, thereby forming a solid, dense, flat and smooth surface film on the surface of the product.

[0003] Publication number CN207188052U discloses a high-efficiency coating machine, including a coating machine body, the air inlet of the coating machine body is connected to a dust removal exhaust fan through a pipeline, the exhaust port of the coating machine body is connected to a high-efficiency filtering hot air blower through a pipeline, the left side of the coating machine body is provided with an electric drive cabinet, the right side of the coating machine body is provided with a peristaltic pump batching barrel connected to the coating machine body, the air inlet of the high-efficiency filtering hot air blower is provided with a primary filter, the high-efficiency filtering hot air blower includes a cabinet, the interior of the cabinet is provided with a centrifugal fan, the right side of the centrifugal fan is provided with a motor, the position above the centrifugal fan in the cabinet is provided with a medium efficiency filter, the middle efficiency filter is provided with a high efficiency filter, and the high efficiency filter is provided with an electric heat exchanger above. This coating machine does not have high efficiency, and it does not have an automatic discharging function, that is, manual intervention is required to achieve discharging, which leads to an increase in the downtime of the equipment. Summary of the invention

[0004] The present invention aims to solve the above-mentioned shortcomings of the prior art and provide a continuous coating machine to solve the above-mentioned problems.

[0005] The present invention solves the technical problem by adopting a technical solution: the continuous coating machine comprises a frame, a coating cylinder rotating at the upper end of the frame, a spray gun located in the coating cylinder, and further comprises:

[0006] A support mechanism is located at the center of the lower end of the frame, and the lower end of the frame is hinged to the support mechanism;

[0007] The lifting mechanism installed under the frame and located at the feeding end of the coating cylinder can drive the frame to move upward and reset;

[0008] The reset mechanism installed under the frame and located at the discharge end of the coating cylinder can drive the frame to move downward and reset. The lifting mechanism is linked with the reset mechanism and cooperates with the supporting mechanism to make the frame swing toward the discharge end of the coating cylinder, and the upward movement distance of the lifting mechanism is smaller than the downward movement distance of the reset mechanism. The principle of the present invention is that, through the linkage of the lifting mechanism and the reset mechanism, the frame is always tilted toward the discharge end of the coating cylinder during the operation stage, that is, when the frame takes the ground as a reference, it changes from being parallel to the ground at 0° without an angle to forming an angle with the ground, and the discharge pipe of the coating cylinder is tilted downward to guide the tablets from the discharge end by gravity, and after the discharge is completed, the feeding can continue to be carried out for the next coating process. In terms of productivity, it has advantages in terms of the simplicity of discharge and the speed of state conversion, and no manual assistance is required during discharge. During feeding, only a device capable of automatic feeding needs to be provided at the feeding end to achieve the continuity of the equipment operation. Compared with the prior art, it can reduce the downtime of the equipment, improve the production efficiency, and avoid the damage of the inner wall of the coating cylinder by auxiliary devices during manual interference in discharge.

[0009] Further improvement, the lifting mechanism has two and is symmetrically arranged on both sides of the coating cylinder, which includes a support seat, a lifter, a first lifting rod and a first support foot. The support seat is arranged at the lower end of the frame and is fixed to the frame at least at two places. The lifter is installed at the top of the support seat. One end of the first lifting rod moves in the lifter and the other end passes through the support seat and extends to the bottom of the frame. The upper part of the first support foot moves in the first lifting rod and the lower part is fixed to the ground, and the upper part and the lower part are actively connected. The first flip mechanism is positioned and fixed by the support seat, and the lifter drives the first lifting rod to move forward / reverse to shorten / restore the length of the first support foot in the first lifting rod, thereby driving the frame to swing toward the discharge end of the coating cylinder and reset after swinging, realizing a simple and effective two-way swing function of the frame. At the same time, the first support foot can also swing with the frame to avoid interfering with the movement of the first lifting rod. This streamlined mechanical structure has a low error rate, and the lower part of the first support foot is fixed to the ground, so that the first support foot can ensure its own stability when the first lifting rod moves, and avoid shaking due to the weight it bears.

[0010] For further improvement, a synchronous shaft is connected between the two lifting seats, a reducer is installed at the right side of the middle of the synchronous shaft, and a servo motor is installed at the front end of the reducer. The synchronous shaft enables the two lifting mechanisms to move synchronously, and then the lifting mechanism moves up / down synchronously, so that the moving distance of the two will not deviate, and the frame will not tilt to one side.

[0011] Further improvement, the reset mechanism has two and is symmetrically arranged on both sides of the coating cylinder, which includes a second lifting rod, a spring strut, a reset spring and a second supporting foot. The frame is provided with a channel at the location where the reset mechanism is installed, and a baffle is provided at the middle of the channel. The spring strut moves in the channel and one end passes through the baffle and moves to the upper part of the channel, and the other end is connected to the second lifting rod, so that the reset spring contacts the baffle when it is sleeved on the spring strut to generate elasticity. The second lifting rod extends to the bottom of the frame, the upper part of the second supporting foot is fixed in the second lifting rod, and the lower part is fixed to the ground, and the upper part and the lower part are actively connected. The second lifting rod is connected to the spring strut to form a whole, and swings at the discharging end of the frame toward the coating cylinder. The whole remains stationary, and the frame moves downward along its length direction by the inertia generated by the tilting. After the movement, the frame changes its position in the horizontal height by using the baffle to compress the reset spring, that is, the reset spring generates elasticity so that the frame can be reset by the elasticity when resetting, and the moving distance is greater than the moving distance of the lifting mechanism. Due to the weight inertia, the tilting angle is better, and the discharging is smoother. This mechanism is relatively simple.

[0012] Further improvement, the channel is provided with a side opening on the frame, the side opening is covered with a cover plate, the inner wall of the cover plate is fixed with a positioning piece, the positioning piece acts on the reset spring and is used to compress the use length of the reset spring. By compressing the use length of the reset spring, the elastic strength of the reset spring is increased, thereby achieving a better reset effect.

[0013] Further improvement, the support mechanism includes a connector and a base, the connector is fixed to the bottom of the frame, the lower end of the connector is hinged to the top of the base, and the base is fixed to the ground. The base is used as the base of the entire frame, and the connector connects the base and the frame. The structure is streamlined and the space distribution is reasonable, providing sufficient installation space for the first flip mechanism and the second flip mechanism.

[0014] For further improvement, a limiter is provided at the lower end of the base at the swing track of the frame, and the limiter limits the swing angle of the frame after the frame swings toward the discharge end of the coating cylinder. The limiter can limit the swing angle of the frame, that is, it is used to resist the inertia caused by gravity, and also to limit the swing angle of the support mechanism, so that the frame is kept at a certain angle.

[0015] Further improvement, the limiter includes a fixed part, a movable part and a limiter respectively arranged on the fixed part and the movable part, the fixed part is fixed to the bottom of the frame, the movable part is movably connected to the upper end of the fixed part, and the limiter causes the limiter to produce a limit when the movable part moves downward, and a pressing piece vertically arranged with the connecting part is fixed to the side of the connecting part close to the limiter, the pressing piece acts on the upper end of the movable part and applies downward pressure to the movable part after the connecting part follows the swing of the frame. The pressing piece follows the swing of the support mechanism, and then the angle changes through the swing to press down the movable part, thereby triggering the limiter, so that the limiter produces a limiting effect, and this limiting mechanism is relatively simple.

[0016] Further improvement, the limiting part has two fixed arms, two swing arms and a guide rod, the fixed arm is fixed to the fixed part and is arranged symmetrically on the left and right, the swing arm is rotatably connected to the moving part and is arranged symmetrically on the left and right, the guide rod is fixed to the center of the lower end of the fixed part and moves on the moving part, the fixed arm acts on the swing arm after the moving part moves and realizes the swing arm to swing inward, and allows it to be positioned against the guide rod. The fixed arm will act on the swing arm following the movement of the moving part, and the swing arm will swing inward under the pressure of the fixed arm, and will be positioned against the moving part, thereby preventing the swing arm from continuing to swing, thereby increasing the limiting effect and avoiding a large swing amplitude of the rack.

[0017] Further improvement, the spray gun has two sections and takes the center of the length direction of the coating cylinder as the center point, and each section of the spray gun is rotated and adjusted and its angular displacement is performed with the axial direction of the coating cylinder as the axis. The spray gun is divided into sections so that the spray gun can adapt to the long strip configuration of the coating cylinder, and the position of the spray gun can be adjusted according to the use status, and the spray gun can be moved outside the coating cylinder by opening the closed door of the coating cylinder, thereby cleaning the spray gun.

[0018] The beneficial effects of the present invention are:

[0019] (1) The present invention realizes rapid adjustment of the frame to tilt toward the discharge end of the coating cylinder by linking the lifting mechanism and the reset mechanism and driving them to swing synchronously in the same direction, and realizes the continuity of coating in this way, which is more convenient;

[0020] (2) The two lifting mechanisms of the present invention can move synchronously through a synchronous shaft, so that the upward and downward movement of the lifting mechanisms are synchronized, so that there is no deviation in the moving distance of the two, thereby preventing the frame from tilting to one side;

[0021] (3) The present invention provides a positioning member for compressing the use length of the reset spring at the reset mechanism, thereby increasing the elastic strength of the reset spring by compressing the use length of the reset spring, thereby achieving a better reset effect;

[0022] (4) The support mechanism of the present invention acts on the center position of the frame and is hinged to the frame, which not only assists the frame in swinging, but also provides good stability before and after the swing, thereby ensuring stable discharging;

[0023] (5) The support mechanism of the present invention is also provided with a limiter, which can limit the swing angle of the frame, that is, it is used to resist the inertia caused by gravity, and also to limit the swing angle of the support mechanism, thereby keeping the frame at a certain angle, thereby reducing the pressure on the lifting mechanism and the reset mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention, in which a plurality of baffles for shielding are hidden;

[0025] Figure 2 For the present invention Figure 1 A local enlarged schematic diagram in FIG.

[0026] Figure 3 It is a partial cross-sectional schematic diagram of the present invention, used to show the lifting mechanism and the resetting mechanism;

[0027] Figure 4 For the present invention Figure 3 The enlarged schematic diagram in the figure is used to further illustrate the lifting mechanism.

[0028] Figure 5 For the present invention Figure 3 The partially enlarged schematic diagram in the figure is used to further illustrate the reset mechanism;

[0029] Figure 6 It is a structural schematic diagram of the positioning member of the present invention;

[0030] Figure 7 For the present invention Figure 3 A partial enlarged schematic diagram in is used to show the supporting mechanism;

[0031] Figure 8 It is a schematic diagram of the full section structure of the limiter of the present invention. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings:

[0033] Referring to the accompanying drawings: This continuous coating machine includes a frame 1, a coating cylinder 2 rotating at the upper end of the frame 1, a spray gun 3 located in the coating cylinder 2, and also includes:

[0034] A support mechanism is located at the center of the lower end of the frame 1, and the lower end of the frame 1 is hinged to the support mechanism;

[0035] A lifting mechanism installed below the frame 1 and located at the feeding end of the coating cylinder 2 can drive the frame 1 to move upward and reset;

[0036] The reset mechanism installed below the frame 1 and located at the discharge end of the coating cylinder 2 can drive the frame 1 to move downward and reset. The lifting mechanism is linked with the reset mechanism and cooperates with the supporting mechanism to make the frame 1 swing toward the discharge end of the coating cylinder 2, and the upward movement distance of the lifting mechanism is less than the downward movement distance of the reset mechanism.

[0037] The principle of the present invention is that, through the linkage of the lifting mechanism and the reset mechanism, the frame 1 is always tilted toward the discharge end of the coating cylinder 2 during the operation stage, that is, when the frame 1 takes the ground as a reference, it changes from being parallel to the ground at 0° without an angle to forming an angle with the ground, and the discharge pipe of the coating cylinder 2 is tilted downward to guide the tablets from the discharge end by gravity, and after the discharge is completed, the feeding can continue to be carried out for the next coating process. For productivity, it has advantages in terms of the simplicity of discharge and the speed of state conversion, and no manual assistance is required during discharge. During feeding, only a device that can realize automatic feeding needs to be set at the feeding end to realize the continuity of equipment operation. Compared with the prior art, it can reduce the downtime of the equipment and improve the production efficiency, and it can also avoid the damage of the inner wall of the coating cylinder 2 through auxiliary devices during manual interference in discharge.

[0038] As for the lifting mechanism, there are two lifting mechanisms and they are symmetrically arranged on both sides of the coating cylinder 2. Therefore, the two lifting mechanisms have the same structure and the same mechanical action. They include a support seat 51, a lifter 52, a first lifting rod 53 and a first supporting foot 54. The support seat 51 has a bayonet at the lower left end and the upper right end. The frame 1 has two fixed points. The fixed points are provided with connecting shafts arranged along the width direction of the frame 1. The two connecting shafts are respectively fixed to the bayonet at the lower left end and the upper right end. The support seat 51 can be firmly fixed to the frame 1 through the two connecting shafts, so that the lifter 52 can not only be stably maintained at a fixed height, but also the inertia force generated by it during operation is offset, thereby making the first lifting rod 53 can be fixed to the frame 1. 3 has stable movement and a relatively simple swing mechanism. The rack 1 is turned over by the telescopic adjustment of the first lifting rod 53, that is, one end of the rack 1 is lifted and the other end is kept in place to generate inertia, and the first supporting leg 54 is an active connection and can swing with the swing of the rack 1, thereby ensuring the coaxiality of the first lifting rod 53 and the driving shaft of the elevator 52. The support seat 51 is provided with a first linear bearing installed on the rack 1, and the first lifting rod 53 moves on the first linear bearing. The first lifting rod 53 has a screw rod 53-a and a first leg column 53-b. The screw rod 53-a is connected to the elevator 52, and the first leg column 53-b is respectively connected to the screw rod 53-a and is for the first supporting leg 54 to move inside.

[0039] A synchronous shaft 7 is connected between the two elevators 52, and a reducer 71 is installed at the right middle part of the synchronous shaft 7. A servo motor 71-a is installed at the front end of the reducer 71. When discharging, the elevator 52 is driven simultaneously through the synchronous shaft 7, that is, the two first lifting rods 53 can move upward synchronously, ensuring that the moving distance is consistent, and providing the frame 1 with sufficient driving force to lift that side upward. The servo motor 71-a provides intelligent control, so that it can start automatically each time during the discharging stage or when resetting after discharging. The moving distance of the first lifting rod 53 is fixed. The setting of the reducer 71 takes into account the overall weight of the frame 1, so the reducer 71 is used to reduce the speed of the reducer 71, so that the first lifting rod 53 moves slowly, which plays a good protective role.

[0040] From the overall structural point of view, firstly, the application of the lifting mechanism enables the frame to swing toward the discharge end of the coating cylinder 2. Although its structure is simple, its function of completing the flipping is sound, which realizes the continuity of the coating machine in the coating work, that is, it can realize rapid discharge, and the feeding equipment is set at the feeding end to complete the autonomous feeding and discharging. Compared with the coating machine of the prior art that requires manual assistance, it has obviously better practicality and makes the production efficiency higher. Secondly, the lifting mechanism uses the support seat 51 as a stable structure, which not only keeps the lifting mechanism at a fixed height, but also increases the stability of the lifting mechanism, that is, it is realized by its own installation with the frame 1, and the other two lifting mechanisms realize synchronous movement through the synchronous shaft 7, so that the mechanical action and the execution distance can be kept consistent, and the stability of the frame 1 after swinging is also guaranteed.

[0041] There are two reset mechanisms which are symmetrically arranged on both sides of the coating cylinder 2. Therefore, the two reset mechanisms have the same structure and the same mechanical action. They include a second lifting rod 61, a spring strut 62, a reset spring 63 and a second supporting foot 64. The frame 1 is provided with a channel 11 at the location where the reset mechanism is installed, and a baffle 11-a is provided at the middle of the channel 11. The spring strut 62 moves in the channel 11 and one end passes through the baffle 11-a and moves to the upper part of the channel 11, while the other end is connected to the second lifting rod 61. When the reset spring 63 is sleeved on the spring strut 62, it contacts the baffle 11-a to generate elasticity. The second lifting rod 61 extends to the bottom of the frame 1. The upper part of the second supporting foot 64 is fixed in the second lifting rod 61, and the lower part is fixed to the ground, and the upper part and the lower part are actively connected. After the lifting mechanism drives the frame 1 to swing, the reset mechanism uses the inertia of the frame 1 after it is tilted to enable the frame 1 to adjust itself, that is, the side located at the discharge end of the coating cylinder 2 moves downward, so that the frame 1 as a whole is tilted. This tilting mechanism is relatively simple, and the inertia after the frame 1 is tilted enables the frame 1 to adjust itself, so that the frame 1 is quickly tilted, and when the frame 1 moves downward along the reset mechanism, the baffle 11-a also moves downward and compresses the reset spring 63 when moving downward. When the lifting mechanism is reset, that is, after the elevator 52 drives the first lifting rod 53 to move downward, the frame 1 is reset toward the feed end of the coating cylinder 2. Due to the reset of the frame 1, the downward pressure on the reset mechanism disappears, and then the downward pressure on the reset spring 63 also disappears, so that the reset spring 63 is reset, and the elasticity of the reset spring 63 is used to accelerate the efficiency of the reset of the frame 1. The operation is relatively simple and the reaction speed is also relatively fast.

[0042] The channel 11 is provided with a side opening 11-b in the frame 1, and a cover plate is provided at the side opening 11-b. A positioning member 81 is fixed to the inner wall of the cover plate. The positioning member 81 acts on the reset spring 63 and is used to compress the use length of the reset spring 63. The cover plate is used to close the channel 11 and also to constrain the reset spring 63 from bending to one side when it is subjected to force. After compressing the use length of the reset spring 63, the positioning member 81 enhances the elasticity of the reset spring 63. After the frame 1 swings, the compression depth of the reset spring 63, that is, the speed of the reset spring 63 returning to its original state after losing the constraint, is further increased, thereby increasing the efficiency of the reset of the frame 1. The positioning member 81 is composed of two vertically arranged fixing plates 81-a and a connecting plate 81-b connected to the two fixing plates 81-a. The connecting plate 81-b is arranged horizontally and allows the reset spring 63 to abut against its lower end, thereby compressing the use length of the reset spring 63.

[0043] The supporting mechanism includes a connecting member 41 and a base 42. The connecting member 41 is a T-shaped member, which has a horizontal part connected to the frame 1 and a vertical part integrally formed with the horizontal part. The vertical part has an insertion cavity, in which an interference fit plug column is inserted, so as to achieve good firmness and stability in supporting the frame 1 and the connecting member 41. The lower end of the plug column has an end hinged to the base 42, thereby assisting the frame 1 to swing together under the drive of the lifting mechanism.

[0044] The lower end of the base 42 is provided with a stopper 9 at the swinging track of the frame 1, and the stopper 9 limits the swinging angle of the frame 1 after the frame 1 swings toward the discharge end of the coating cylinder 2. The stopper 9 is used to limit the swinging amplitude of the frame 1 due to inertia after the swing, that is, to prevent the frame 1 from being at the bottom of the discharge end of the coating cylinder 2 and the ground foundation, thereby reducing the external pressure on the lifting mechanism and the reset mechanism, that is, to avoid the occurrence of the breakage.

[0045] The limiting member 9 includes a fixed portion 91, a movable portion 92, and a limiting portion 93 respectively arranged on the fixed portion 91 and the movable portion 92. The fixed portion 91 is fixed to the bottom of the frame 1, and the movable portion 92 is movably connected to the upper end of the fixed portion 91. When the movable portion 92 moves downward, the limiting portion 93 is limited. A pressing piece 41-a is fixed on one side of the connecting member 41 close to the limiting member 9 and is vertically arranged with the connecting member 41. The pressing piece 41-a acts on the upper end of the movable portion 92 and applies downward pressure to the movable portion 92 after the connecting member 41 swings with the frame 1. force; the limiting part 93 has two fixed arms 93-a, two swing arms 93-b and a guide rod 93-c, the fixed arm 93-a is fixed to the fixed part 91 and is symmetrically arranged on the left and right, the swing arm 93-b is rotatably connected to the movable part 92 and is symmetrically arranged on the left and right, the guide rod 93-c is fixed to the center of the lower end of the fixed part 91 and moves to the movable part 92, and the fixed arm 93-a moves with the movable part 92, and acts on the swing arm 93-b to realize the inward swing of the swing arm 93-b, and allows it to press against the guide rod 93-c to achieve positioning.The movable part 92 has a first mounting plate 92-a and an insert block, and the fixed part 91 has a second mounting plate and a limit seat 91-b, wherein the guide rod 93-c is installed at the center position of the first mounting plate 92-a, the insert block has a through slot and is fixed to one side of the first mounting plate 92-a, and allows the guide rod 93-c to pass through the through slot, the second mounting plate is installed at the bottom of the frame 1 through two connecting rods, the limit seat 91-b is fixed to the upper end surface of the second mounting plate, and is arranged opposite to the insert block, the limit seat 91-b has a middle protrusion, and the protrusion also has a through slot for the guide rod 93-c to pass through, and at the same time, the inner circumference of the through slot of the insert block rubs against the outer circumference of the protrusion of the limit seat 91-b. The second mounting plate also has a through hole for the guide rod 93-c to pass through, so that the movable part 92 can be moved on the fixed part 91 with good movement stability. The guide rod 93-c is also sleeved with a spring, and one end is fixed to the same side of the fixed plug of the first mounting plate 92-a, and the other end is fixed to the same side of the fixed limit seat 91-b of the second mounting plate. In this way, the movable part 92 can be prevented from escaping from the fixed part 91, thereby preventing the two from losing their fit. At the same time, in order to increase the limit stability and make the limit mechanism have a good ability to resist loads, it is achieved through two fixed arms 93-a and two swing arms 93-b. The fixed arm 93-a follows As the movable part 92 moves, it approaches the swing arm 93-b, and after the two are in contact, the swing arm 93-b gradually deepens with the movement stroke of the fixed arm 93-a or the movable part 92, and the swing arm 93-b also rotates inward, and changes from the initial state where the inclination angle is greater than 0° to the state where the inclination angle is equal to 0° with the side of the second mounting plate used to mount the limit seat 91-b as a reference. In this state, the swing arm 93-b can approach the guide rod 93-c and abut against the outer peripheral surface of the guide rod 93-c, so that the limit mechanism has a good ability to resist loads. At the same time, the fixed arm 93-a is L-shaped. This structural setting makes the fixed arm 93-a It can extend to the upper end of the swing arm 93-b, and on the other hand can be connected to a pressure piece. The pressure piece can be a spherical configuration, and the swing arm 93-b is also L-shaped. Such a configuration allows the swing arm 93-b to have a sufficient structural area. It can not only be rotatably connected to the limit seat 91-b, but also pass through the second mounting plate and extend to the guide rod 93-c, and then abut against the guide rod 93-c according to the swing. At the same time, in order to avoid hard contact between the swing arm 93-b and the guide rod 93-c, one end of the guide rod 93-c is provided with a spring and a pressure block. The pressure block is made of rubber material, so that when it contacts the guide rod 93-c, it will not damage the surface of the guide rod 93-b, and the abutment strength is good.

[0046] The spray gun 3 has two sections and takes the center of the length direction of the coating cylinder 2 as the center point, and each section of the spray gun 3 is rotated and adjusted and its angular displacement is performed with the axial direction of the coating cylinder 2 as the axis. The segmented setting of the spray gun 3 allows the spray gun 3 to adapt to the long strip configuration of the coating cylinder 2, and the position of the spray gun can be adjusted according to the use status, and the closed door of the coating cylinder 2 is assembled as a whole with the spray gun 3, so that when the spray gun 3 is pulled out, the closed door is also moved out together, providing enough space for handling the hygiene inside the coating cylinder 2, and it is also convenient to clean the spray gun 3. At the same time, the distance between the spray gun 3 and the tablets to be coated can be adjusted online during the production process, and the rotation can be performed with the axial direction of the coating cylinder 2 as the axis, which can be realized by motorization. Due to the characteristics of the product, its adjustment frequency is lower than that of the traditional coating machine, and it can also be adjusted manually.

[0047] Although the invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A continuous coating machine, comprising a frame (1), a coating cylinder (2) rotating at the upper end of the frame (1), and a spray gun (3) located in the coating cylinder (2). Features: Also includes: A support mechanism located at the center of the lower end of the frame (1), the lower end of the frame (1) being hinged to the support mechanism; A lifting mechanism installed below the frame (1) and located at the feeding end of the coating cylinder (2), capable of driving the frame (1) to move upward and reset; A reset mechanism installed below the frame (1) and located at the discharge end of the coating cylinder (2) can drive the frame (1) to move downward and reset, the lifting mechanism is linked with the reset mechanism and cooperates with the supporting mechanism to make the frame (1) swing toward the discharge end of the coating cylinder (2), and the upward movement distance of the lifting mechanism is less than the downward movement distance of the reset mechanism; The lifting mechanism has two parts and is symmetrically arranged on both sides of the coating cylinder (2), and comprises a support seat (51), a lifter (52), a first lifting rod (53) and a first supporting foot (54); the support seat (51) is arranged at the lower end of the interior of the frame (1) and is fixed to the frame (1) at least at two locations; the lifter (52) is installed on the top of the support seat (51); one end of the first lifting rod (53) moves inside the lifter (52) and the other end passes through the support seat (51) and extends to the bottom of the frame (1); the upper part of the first supporting foot (54) moves inside the first lifting rod (53) and the lower part is fixed to the ground, and the upper part and the lower part are actively connected; A synchronous shaft (7) is connected between the two elevators (52), a reducer (71) is installed at the right side of the middle of the synchronous shaft (7), and a servo motor (71-a) is installed at the front end of the reducer (71); The reset mechanism has two and is symmetrically arranged on both sides of the coating cylinder (2), and comprises a second lifting rod (61), a spring support rod (62), a reset spring (63) and a second supporting foot (64). The frame (1) is provided with a channel (11) at the location where the reset mechanism is installed, and a baffle (11-a) is provided at the middle of the channel (11). The spring support rod (62) moves in the channel (11) and one end passes through the baffle (11-a) and moves to the upper part of the channel (11), while the other end is connected to the second lifting rod (61), so that when the reset spring (63) is sleeved on the spring support rod (62), it contacts with the baffle (11-a) to generate elasticity. The second lifting rod (61) extends to the bottom of the frame (1), the upper part of the second supporting foot (64) is fixed in the second lifting rod (61), and the lower part is fixed to the ground, and the upper part and the lower part are actively connected; The channel (11) is provided with a side opening (11-b) on the frame (1); the side opening (11-b) is covered with a cover plate; a positioning member (81) is fixed to the inner wall of the cover plate; the positioning member (81) acts on the return spring (63) and is used to compress the use length of the return spring (63); The positioning member (81) is composed of two vertically arranged fixing plates (81-a) and a connecting plate (81-b) connected to the two fixing plates (81-a). The connecting plate (81-b) is arranged horizontally and allows the return spring (63) to abut against its lower end, thereby achieving the use length of the compression return spring (63).

2. The continuous coating machine according to claim 1, Features: The support mechanism comprises a connecting member (41) and a base (42); the connecting member (41) is fixed to the bottom surface of the frame (1); the lower end of the connecting member (41) is hinged to the upper end of the base (42); and the base (42) is fixed to the ground.

3. The continuous coating machine according to claim 2, Features: A limiter (9) is provided at the lower end of the base (42) at the swing trajectory of the frame (1), and the limiter (9) limits the swing angle of the frame (1) after the frame (1) swings toward the discharge end of the coating cylinder (2).

4. The continuous coating machine according to claim 3, Features: The limiting member (9) comprises a fixed portion (91), a movable portion (92) and a limiting portion (93) respectively arranged on the fixed portion (91) and the movable portion (92); the fixed portion (91) is fixed to the bottom of the frame (1); the movable portion (92) is movably connected to the upper end of the fixed portion (91); the limiting portion (93) causes the limiting portion (93) to be limited when the movable portion (92) moves downward; a pressing sheet (41-a) is fixed on one side of the connecting member (41) close to the limiting member (9) and is arranged perpendicular to the connecting member (41); the pressing sheet (41-a) acts on the upper end of the movable portion (92) and applies downward pressure to the movable portion (92) after the connecting member (41) swings along with the frame (1).

5. The continuous coating machine according to claim 4, Features: The limiting part (93) comprises two fixed arms (93-a), two swing arms (93-b) and a guide rod (93-c); the fixed arm (93-a) is fixed to the fixed part (91) and is symmetrically arranged on the left and right; the swing arm (93-b) is rotatably connected to the movable part (92) and is symmetrically arranged on the left and right; the guide rod (93-c) is fixed to the center of the lower end of the fixed part (91) and moves to the movable part (92); the fixed arm (93-a) acts on the swing arm (93-b) after moving with the movable part (92) to realize the inward swing of the swing arm (93-b) and allows it to abut against the guide rod (93-c) to realize positioning.

6. The continuous coating machine according to claim 1, Features: The spray gun (3) has two sections and takes the center of the length direction of the coating cylinder (2) as the center point, and each section of the spray gun (3) is rotated and adjusted and its angular displacement is performed around the axial direction of the coating cylinder (2).

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