Pellet filling device of capsule machine

Abstract

The utility model provides a pellet filling device of a capsule machine, which comprises a capsule machine frame, a blanking mechanism and a filling mechanism, the blanking mechanism comprises a conical hopper, the filling mechanism comprises a metering panel, a central rotating disc, a punching rod, a swinging knife and a swinging knife transmission device, the metering panel is provided with metering holes, and the central rotating disc is used for placing capsule shells; the swinging cutter is provided with a material blocking position for enabling the discharging hole and the metering hole not to coincide, and a discharging position for enabling the discharging hole and the metering hole to coincide with the opening of the capsule shell on the central rotating disc; according to the device, the punching rod is arranged, the diameter of the punching rod is matched with the inner diameter of the metering hole, the punching rod penetrates through the metering hole from the upper portion of the metering panel to push pellets into a capsule shell, and the situation that the discharging amount of the pellets is insufficient due to the fact that static electricity is adsorbed to the inner wall of the metering hole in the discharging process is avoided; a swing cutter is arranged below the metering panel in a matched manner, so that the pellets with good flowability are prevented from leaking during rotation; the improved structure is simple, use is convenient, installation is easy, and good practicability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of capsule machines, and specifically to a pellet filling device for a capsule machine. Background Art

[0002] At present, capsule machines are widely used in the field of capsule manufacturing. Capsule machines usually have a powder filling device. For example, a powder filling device for a capsule machine disclosed in Chinese Utility Model CN202020396038.6 includes a capsule machine frame, a filling mechanism, a dual-axis power mechanism, a servo motor, and a cylinder. The dual-axis structure of this device performs powder filling and hopper movement under the drive of the servo motor and the cylinder respectively, and is provided with fastening screws to adjust the rotation angle.

[0003] Pellets are spherical or quasi-spherical solid dosage forms with a small diameter. They can also be filled into capsules, pressed into tablets, or made into other preparations. Pellets are a multi-unit oral dosage form. Usually, the dose of a single administration consists of dozens to hundreds of small pellets, and different types of pellets such as sustained-release and enteric-coated can be made. Compared with granules or powders, pellets have better fluidity. When filling pellets into capsules, no glidant is required. Compared with filling capsules with powders, the weight difference is small, and they are often used to prepare compound preparations.

[0004] The applicant has been engaged in the research and development and improvement of pharmaceutical equipment for a long time. Although pellets have good fluidity, during capsule filling, pellets are likely to fail to fall freely into the capsules due to static electricity, resulting in the problem that the filling quantity difference does not meet the quality requirements. Therefore, a pellet filling device for a capsule machine is designed to make the capsule machine have better practical performance. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies existing in the prior art, and to provide a pellet filling device for a capsule machine. The technical solution adopted by the utility model is as follows:

[0006] A pellet filling device for a capsule machine includes a capsule machine frame, a feeding mechanism, and a filling mechanism. The feeding mechanism includes a conical hopper. The filling mechanism includes a metering disk and a central rotating disk. The metering disk is provided with metering holes. The central rotating disk is used to place the capsule shells to be filled. The filling mechanism further includes a punch rod, a swing knife, and a swing knife transmission device. The swing knife is located between the metering disk and the central rotating disk, and a feeding hole is formed on the swing knife. The swing knife has a material blocking position where the feeding hole does not coincide with the metering hole, and a feeding position where the feeding hole coincides with both the metering hole and the opening of the capsule shell on the central rotating disk. The swing knife transmission device drives the swing knife to swing and switch between the material blocking position and the feeding position. When the swing knife is in the feeding position, the punch rod penetrates through the metering hole from above the metering disk to push the pellets into the capsule shell.

[0007] Preferably, the punching rod is installed above the metering disk, and a guiding mechanism and a driving mechanism are provided for the punching rod. The driving mechanism drives the punching rod to expand and contract relative to the metering hole under the guiding action of the guiding mechanism.

[0008] Preferably, the feeding mechanism includes a conical hopper, a stirring paddle and a feeding screw inside the conical hopper. The stirring paddle and the feeding screw are coaxially arranged and driven to rotate by a driving motor.

[0009] Preferably, a feeding channel is extended at the discharging end of the conical hopper. The feeding screw extends from inside the conical hopper into the feeding channel, and a valve is arranged at one end of the feeding channel far from the conical hopper.

[0010] Furthermore, only a gap for relative rotation is left between the protruding downward spiral on the feeding screw and the inner wall of the feeding channel. The valve includes a valve plate for controlling the opening and closing of the outlet of the feeding channel.

[0011] Preferably, a level sensor is provided for the metering disk. After the material accumulation in the metering hole is detected by the level sensor to reach the set height or mass, a signal is sent to control the feeding mechanism to pause feeding; the level sensor can be a conventional sensor for detecting water level and weight, and its principle and model selection are not introduced in detail here.

[0012] Preferably, at least two stations are provided on the metering disk, and each station includes several metering holes. At least two stations are provided on the central rotating disk, and each station of the central rotating disk includes several capsule shell mounting molds with the same quantity as each station of the metering disk. The metering disk is rotatably arranged relative to the central rotating disk.

[0013] Preferably, a scraping block is provided above the metering hole. The scraping block is close to the upper surface of the metering disk and only a gap for relative movement is left between them. The metering disk and the scraping block can move relatively; the scraping block is located between the punching rod and the metering disk, and a through hole for the punching rod to pass through is opened on the scraping block, and the through holes on the scraping block are arranged in the same way as the arrangement of the metering holes at each station of the metering disk.

[0014] Preferably, the swing knife transmission device includes a sprocket, a speed reducer driven by the sprocket, a swing knife cam driven by the speed reducer, and a cam follower roller cooperating with the swing knife cam.

[0015] The beneficial effects of the present utility model are as follows: By setting a punch rod and making the diameter of the punch rod match the inner diameter of the metering hole, the punch rod penetrates through the metering hole from above the metering disk to push the pellets into the capsule shell, so as to avoid insufficient feeding amount caused by electrostatic adsorption of the pellets on the inner wall of the metering hole during the feeding process; a swing knife is arranged under the metering disk to prevent the pellets with good fluidity from leaking when rotating (the opening of the capsule shell where the metering hole is not aligned with the central rotating disk); the improved structure is simple, easy to use and install, and has good practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, obtaining other drawings based on these drawings still belongs to the scope of the present utility model.

[0017] Figure 1 It is a schematic diagram of the main structure of Embodiment 1;

[0018] Figure 2 It is a schematic diagram of another angle of the main structure of Embodiment 1;

[0019] Figure 3 It is a schematic diagram of the swing knife in the feeding position in Embodiment 1;

[0020] Figure 4 It is a schematic diagram of the swing knife in the material blocking position in Embodiment 1;

[0021] Figure 5 It is a schematic diagram of the conical hopper and its internal structure in Embodiment 1;

[0022] In the figure, 101 - feeding screw, 1011 - lower rotating helix, 102 - valve, 1022 - valve plate, 103 - spring, 104 - stirring paddle, 105 - motor, 106 - conical hopper, 206 - punch rod, 207 - scraping block, 208 - metering disk, 210 - swing knife driving device, 2101 - swing knife, 2102 - cam follower roller, 2103 - swing knife cam, 2104 - reducer, 2105 - sprocket, 211 - central rotating disk. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following will further describe the present utility model in detail with reference to the drawings.

[0024] It should be noted that all the expressions using "first" and "second" in the embodiments of the present utility model are for distinguishing two entities or parameters with the same name but different, and it can be seen that "first" and "second" are only for the convenience of expression and should not be construed as a limitation on the embodiments of the present utility model. This will not be elaborated one by one in the subsequent embodiments.

[0025] The direction and position terms mentioned in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only with reference to the direction or position of the attached drawings. Therefore, the direction and position terms used are for explaining and understanding the present utility model, rather than a limitation on the protection scope of the present utility model.

[0026] Since the overall structure of the capsule machine is relatively complex and there are many components, to highlight the key points and avoid interference, structures such as the machine housing that can be anticipated and set by those skilled in the art are hidden in the attached drawings, and some components (such as Figure 1 the hopper in) are "transparently" processed. Therefore Figures 1 - 5 what is shown in is not the structural diagram of all components of this device, but only the structure beneficial to explaining the technical solution of this patent.

[0027] Embodiment 1

[0028] As Figures 1 - 4 shown, a pellet filling device for a capsule machine includes a capsule machine frame, a feeding mechanism, and a filling mechanism. The feeding mechanism includes a hopper 106, a stirring paddle 104 arranged in the hopper 106, and a feeding component. A feeding channel extends downward from the hopper 106. The feeding component includes a feeding screw 101 extending from inside the hopper 106 into the feeding channel. The feeding screw 101 rotates coaxially with the stirring paddle 104, and a valve 102 is arranged at the end of the feeding screw 101 away from the hopper 106.

[0029] Referring to Figure 5 , the valve 102 includes a spring 103 and a valve plate. The spring 103 has a compressed state and a resilient state. The end of the screw 101 is connected to a limit post. The spring 103 is sleeved on the limit post and one end of it abuts against the valve plate, and the other end is limited at the end of the limit post. When the feeding screw 101 rotates to push the material in the hopper 106 to feed, the material pushes the valve plate to open the discharge port of the feeding channel and compresses the spring, so that the spring 103 is in a compressed state. When the resilience of the spring 103 is greater than the gravity of the material above it, the spring 103 drives the valve plate to rebound and close the discharge port of the feeding channel. At this time, the spring is in a resilient state.

[0030] The filling mechanism includes a punching rod 206, a leveling block 207, a metering disc 208, a level sensor 209, a swing knife transmission device 210, and a central rotating disc 211. After the valve 102 is opened, the pellets in the conical hopper 106 will flow into the metering holes on the metering disc 208. When the pellet level in the metering holes rises and the level sensor 209 detects that it reaches the set height, the valve 102 closes, and the pellets in the conical hopper 106 will flow into all the metering holes as the metering disc 208 rotates intermittently.

[0031] A material discharging hole is formed on the swing knife 2101. The swing knife 2101 is located between the lower end surface of the metering disc 208 and the upper surface of the lower die of the capsule, and has a material blocking position ( Figure 4 ) where the material discharging hole does not coincide with the metering hole, and a material discharging position ( Figure 3 ) where the material discharging hole coincides with both the metering hole and the opening of the lower capsule housing on the central rotating disc 211. The swing knife transmission device 210 drives the swing knife 2101 to swing and switch between the material blocking position and the material discharging position.

[0032] The central rotating disc 211 is equipped with a lower die of the capsule. An upward-opening capsule housing is placed inside the lower die of the capsule. The punching rod 206 corresponds to the metering holes on the metering disc 208. In this embodiment, the metering disc 208 has six workstations. When one of the workstations rotates to the filling station on the central rotating disc 211 (during the rotation of the metering disc 208, the swing knife 2101 is in the material blocking position, so that the hole corresponding to the filling station on the metering disc 208 is blocked by the swing knife to prevent the pellets from flowing down), the leveling block 207 adheres to the surface of the metering disc 208, scrapes off the excess pellets, so that the pellets exactly fill the metering holes, and the position of the metering holes exactly corresponds to the lower die of the capsule on the central rotating disc 211. Then the swing knife 2101 swings to the material discharging position, so that the pellets fall into the capsule housing in the lower die of the capsule. After the discharging is completed, this workstation continues to rotate, so that the metering holes of another workstation complete the discharging, and so on in a cycle.

[0033] The swing knife transmission device 210 includes a cam follower roller 2102, a swing knife cam 2103, a speed reducer 2104, a sprocket 2105. The sprocket 2105 is driven by a chain driven by a sprocket motor. After being reversed by the speed reducer 2104, it drives the swing knife cam 2103 to rotate. The cam curve of the swing knife cam 2103 (which can be set by those skilled in the art according to needs) enables the swing knife 2101 equipped with the cam follower roller 2102 to perform a left-right swinging action. The left-right swinging action realizes the switching of the swing knife 2101 between the material blocking position and the material discharging position. Those skilled in the art can also choose other existing driving mechanisms that can realize the swinging of the swing knife to realize its swinging action, and will not list them one by one here.

[0034] The above-disclosed is only the preferred embodiment of the present utility model. Of course, it cannot be used to limit the scope of rights of the present utility model. Therefore, equivalent changes made according to the claims of the present utility model still fall within the scope covered by the present utility model.

Claims

1. A pellet filling device for a capsule machine, comprising a capsule machine frame, a blanking mechanism, and a filling mechanism. The blanking mechanism includes a conical hopper. The filling mechanism includes a metering disk (208) and a central rotating disk (211). The metering disk (208) has metering holes. The central rotating disk (211) is used to place the capsule shells to be filled, and is characterized in that: The filling mechanism further includes a punching rod (206), a swing knife (2101) and a swing knife transmission device (210); The swing knife (2101) is located between the metering disc (208) and the central rotating disc (211), and a material discharging hole is formed in the swing knife (2101). The swing knife (2101) has a material blocking position where the material discharging hole does not coincide with the metering hole, and a material discharging position where the material discharging hole coincides with both the metering hole and the capsule shell opening on the central rotating disc (211). The swing knife transmission device (210) drives the swing knife (2101) to swing and switch between the material blocking position and the material discharging position; When the swing knife (2101) is in the material discharging position, the punching rod (206) penetrates through the metering hole from above the metering disc (208) to push the pellets into the capsule shell.

2. The micro - pellet filling device of a capsule machine according to claim 1, characterized in that: The punching rod (206) is installed above the metering disc (208), and a guiding mechanism and a driving mechanism are arranged in cooperation with the punching rod (206). The driving mechanism drives the punching rod (206) to stretch relative to the metering hole under the guiding action of the guiding mechanism.

3. The micro-pill filling device of a capsule machine according to claim 1, characterized in that: At least two working positions are arranged on the metering disc (208), each working position includes a plurality of metering holes. At least two working positions are arranged on the central rotating disc (211), and each working position of the central rotating disc (211) includes a plurality of capsule shell installation molds with the same quantity as each working position of the metering disc (208). The metering disc (208) is rotatably arranged relative to the central rotating disc (211).

4. The micro-pill filling device of a capsule machine according to claim 1 or 3, characterized in that: A leveling block (207) is arranged in cooperation above the metering hole. The leveling block (207) is close to the upper surface of the metering disc (208), and only a gap for relative movement is left between the two. The metering disc (208) and the leveling block (207) can move relative to each other.

5. The pellet filling device of a capsule machine according to claim 1, characterized in that: The feeding mechanism includes a conical hopper (106) and a stirring paddle and a feeding screw (101) inside it. The stirring paddle and the feeding screw (101) are coaxially arranged and driven to rotate by a driving motor.

6. The micro-pill filling device of a capsule machine according to claim 5, characterized in that: The discharging end of the conical hopper (106) extends to form a discharging channel. The feeding screw (101) extends from inside the conical hopper (106) into the discharging channel, and a valve (102) is arranged at one end of the discharging channel far from the conical hopper (106).

7. The pellet filling device of a capsule machine according to claim 6, characterized in that: Only a gap for relative rotation is left between the downward spiral (1011) protruding on the feeding screw (101) and the inner wall of the discharging channel. The valve (102) includes a valve plate (1022) for controlling the opening and closing of the discharging channel outlet.

8. A pellet filling device for a capsule machine according to any one of claims 5-7, characterized in that: A material level sensor is arranged in cooperation with the metering disc (208). After the material level sensor detects that the material accumulation in the metering hole reaches the set height or mass, it sends a signal to control the feeding mechanism to pause feeding.

9. The micro-pill filling device of a capsule machine according to claim 8, characterized in that: A leveling block (207) is arranged in cooperation above the metering hole. The leveling block (207) is located between the punching rod (206) and the metering disc (208). A through hole for the punching rod (206) to pass through is formed in the leveling block (207), and the through holes of the leveling block (207) are arranged in the same pattern as the arrangement of the metering holes at each working position of the metering disc (208).

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