A granule weighing and sub-packaging machine

Abstract

The utility model discloses a granule weighing and subpackaging machine, including mounting bracket, blanking mechanism, weighing mechanism and control unit, blanking mechanism, weighing mechanism and intermediate mechanism are set gradually from top to bottom on mounting bracket, blanking mechanism is used for storing granule and is thrown granule to weighing mechanism, and blanking mechanism includes weighing hopper, control cylinder, weighing sensor and gate, and the one side of mounting bracket is fixedly connected with mounting panel, and the weighing sensor is arranged on mounting panel, and the weighing hopper is arranged on weighing sensor, and the control cylinder is fixedly connected with weighing hopper, and the gate is slidably connected in the bottom of weighing hopper, and the piston rod of control cylinder is fixedly connected with gate, wherein, the weighing hopper is used for receiving the granule provided by blanking mechanism, and the control unit is used for receiving the signal of weighing sensor and controls the granule throwing of blanking mechanism, the utility model discloses through the closed loop control of weighing sensor and control unit, avoids the error of manual operation, and ensures the consistency of material weight.

Description

Technical Field

[0001] This utility model belongs to the field of pharmaceutical packaging technology, specifically a granule weighing and packaging machine. Background Technology

[0002] With the increasing demands of industrial production in the pharmaceutical, food, and chemical industries, the requirements for precision, efficiency, and automation in granule packaging are becoming increasingly stringent. Traditional manual weighing and packaging methods, due to their high labor intensity, high error rate, and inability to meet the needs of mass production, have been gradually replaced by automated equipment. In recent years, the market demand for intelligent and flexible granule packaging equipment has grown significantly. For example, the pharmaceutical industry requires packaging accuracy of ±0.1g, while the food industry needs the ability to quickly switch between various packaging specifications. Against this backdrop, automated packaging equipment with real-time feedback control and multi-scenario adaptability has become the mainstream direction of industry development.

[0003] Some existing equipment uses fixed-volume feeding, such as screw feeders or vibrating screens, which cannot adjust the feeding amount in real time according to the material characteristics, resulting in large fluctuations in the packaged weight. For example, vibrating packaging equipment will still produce additional material falling due to material inertia when it stops, affecting the final accuracy.

[0004] A granule dispensing device is disclosed in patent CN207450294U. This device uses a vibrator to drive material through a feeding pipe for dispensing. While it can achieve simultaneous dispensing of multiple portions, it suffers from the following problems: After the vibrator stops, material continues to fall from the feeding hole due to gravity, causing the actual dispensing volume to exceed the target value, especially in small-dose dispensing scenarios where the error is more significant. Furthermore, the device lacks a real-time feedback system integrating a weighing sensor and a control unit, making it unable to dynamically adjust the feeding speed based on the actual weight. This results in poor consistency in dispensing weight between different batches, necessitating manual re-inspection. Utility Model Content

[0005] The purpose of this invention is to provide a granule weighing and dispensing machine to solve the following technical problems mentioned in the background art:

[0006] Existing granule filling machines suffer from low filling weight consistency and limited efficiency due to excessive manual intervention.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A granule weighing and dispensing machine includes a mounting frame, a feeding mechanism, a weighing mechanism, and a control unit. The feeding mechanism, weighing mechanism, and intermediate mechanism are arranged sequentially from top to bottom on the mounting frame. The feeding mechanism stores granules and dispenses them into the weighing mechanism. The feeding mechanism includes a weighing hopper, a control cylinder, a weighing sensor, and a gate. A mounting plate is fixedly connected to one side of the mounting frame, and a weighing sensor is mounted on the mounting plate. A weighing hopper is mounted on the weighing sensor. The control cylinder is fixedly connected to the weighing hopper. The gate is slidably connected to the bottom of the weighing hopper, and the piston rod of the control cylinder is fixedly connected to the gate. The weighing hopper receives granules supplied by the feeding mechanism. The control unit receives signals from the weighing sensor and controls the dispensing of granules by the feeding mechanism.

[0009] Furthermore, the feeding mechanism includes a feeding hopper, a conveying cylinder, an auger shaft, and a motor; the conveying cylinder is fixedly connected to the mounting frame, and material inlets and material outlets are provided on both sides of the conveying cylinder, with the material outlets facing the weighing hopper; the feeding hopper is fixedly connected to the conveying cylinder, and the bottom of the feeding hopper is connected to the material inlet; the auger shaft is rotatably connected inside the conveying cylinder, the motor is fixedly connected to the mounting frame, the output shaft of the motor extends into the conveying cylinder and is fixedly connected to the auger shaft, and the motor is electrically connected to the control unit.

[0010] Furthermore, the cross-section of one side of the bottom of the weighing hopper is a right-angled trapezoidal structure; the inclined surface of the weighing hopper is connected to the weighing sensor.

[0011] Furthermore, guide grooves are provided on both sides of the bottom of the weighing hopper, and the two sides of the gate are slidably connected in the guide grooves.

[0012] Furthermore, an intermediate mechanism is provided on the mounting frame below the weighing mechanism; the intermediate mechanism includes an intermediate hopper, a closed clamping plate, and a closed cylinder. The intermediate hopper is fixedly connected to the mounting frame and faces the weighing hopper; the closed clamping plate is hinged to the bottom of the intermediate hopper, and the two ends of the closed cylinder are respectively hinged to the mounting frame and the closed clamping plate.

[0013] Furthermore, an auxiliary hopper is provided below the intermediate mechanism on the mounting frame, and the auxiliary hopper is fixedly connected to the support frame.

[0014] Furthermore, a placement seat is provided on the mounting frame below the auxiliary hopper.

[0015] Furthermore, there are two sets of sealing clamps and sealing cylinders, which are symmetrically arranged at the bottom of the intermediate hopper.

[0016] Furthermore, the bottom sides of the intermediate hopper are fixed with end caps.

[0017] Furthermore, a rubber pad is provided at the end of the positioning head.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention achieves efficient quantitative dispensing of granules through automated weighing and feeding control; closed-loop control of the weighing sensor and control unit avoids errors from manual operation and ensures consistent material weight. This design enables automated continuous operation, reduces manual intervention, and effectively improves production efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is one of the cross-sectional schematic diagrams of this utility model;

[0022] Figure 3 This is the second cross-sectional view of the present invention;

[0023] Figure 4 This is a schematic diagram of the intermediate mechanism of this utility model.

[0024] The markings in the diagram are: 1-feeding mechanism, 2-weighing mechanism, 3-mounting frame, 4-placement seat, 5-auxiliary feeding hopper, 6-intermediate mechanism, 7-control unit, 8-material outlet, 9-transfer cylinder, 10-auger shaft, 11-feeding hopper, 12-material inlet, 13-motor, 14-weighing sensor, 15-mounting plate, 16-control cylinder, 17-weighing hopper, 18-gate, 19-intermediate hopper, 20-sealing clamp, 21-positioning head, 22-sealing cylinder. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example:

[0027] A granule weighing and dispensing machine, such as Figure 1 As shown, it includes a mounting frame 3, a feeding mechanism 1, a weighing mechanism 2, and a control unit 7; the feeding mechanism 1, the weighing mechanism 2, and the intermediate mechanism 6 are arranged sequentially from top to bottom on the mounting frame 3; the feeding mechanism 1 is used to store granules and feed granules to the weighing mechanism 2; as shown... Figure 3As shown, the feeding mechanism 1 includes a weighing hopper 17, a control cylinder 16, a weighing sensor 14, and a gate 18; a mounting plate 15 is fixedly connected to one side of the middle of the mounting frame 3, the weighing sensor 14 is installed on the mounting plate 15, the weighing hopper 17 is installed on the weighing sensor 14, the control cylinder 16 is fixedly connected to the weighing hopper 17, the gate 18 is slidably connected to the bottom of the weighing hopper 17, and the piston rod of the control cylinder 16 is fixedly connected to the gate 18; wherein, the weighing hopper 17 is used to receive the granules provided by the feeding mechanism 1; the control unit 7 is used to receive the signal from the weighing sensor 14 and control the feeding of granules by the feeding mechanism 1.

[0028] The control unit 7 can be a PLC-based control unit, including a PLC host, a display screen, and input / output modules. The operator inputs the target dispensing weight via the touchscreen, and the parameters are transmitted to the PLC host. The weighing sensor 14 converts the real-time weight of the particles in the hopper into an electrical signal, which is transmitted to the PLC via the input module. The PLC's internal program compares the real-time weight with the target value: when the weight is less than 90% of the target value, the PLC sends a "high-speed feeding" command to the feeding mechanism 1 via the output module. When the weight reaches 90% to 98% of the target value, a "low-speed feeding" command is sent. When the weight reaches the set value, a "stop feeding" command is immediately sent, and simultaneously a "ventilate" command is sent to the control cylinder 16. The cylinder piston rod extends, driving the gate 18 to open for unloading. After unloading is completed, the PLC sends a "stop air" command to the control cylinder 16, the cylinder resets, the gate 18 closes, and the next cycle is triggered.

[0029] This granule weighing and dispensing machine achieves automatic quantitative weighing and dispensing of granules through the coordinated operation of the feeding mechanism 1, the weighing mechanism 2, and the control unit 7. The feeding mechanism 1 stores the granules and, under the command of the control unit 7, feeds the granules into the weighing hopper 17 below. After receiving the granules, the weighing sensor 14 detects the weight of the granules in the hopper in real time and transmits the weight signal to the control unit 7. When the control unit 7 determines that the weight of the granules in the weighing hopper 17 has reached the preset value, it immediately controls the feeding mechanism 1 to stop feeding; then the control unit 7 drives the control cylinder 16 to slide the gate 18 to open the bottom of the weighing hopper 17, unloading the quantitative granules and completing the dispensing; after unloading, the control cylinder 16 resets, the gate 18 closes, and the next cycle begins.

[0030] This equipment achieves efficient quantitative dispensing of granules through automated weighing and feeding control. Closed-loop control via weighing sensor 14 and control unit 7 avoids errors from manual operation, ensuring consistent material weight. This design enables automated continuous operation, reduces manual intervention, and is suitable for mass production scenarios.

[0031] In a preferred embodiment, such as Figure 2As shown, the feeding mechanism 1 includes a feeding hopper 11, a conveying cylinder 9, an auger shaft 10, and a motor 13; the conveying cylinder 9 is fixedly connected to the mounting frame 3, and material inlets 12 and material outlets 8 are provided on both sides of the conveying cylinder 9, with the material outlets 8 facing the weighing hopper 17; the feeding hopper 11 is fixedly connected to the conveying cylinder 9, and the bottom of the feeding hopper 11 is connected to the material inlet 12; the auger shaft 10 is rotatably connected to the inside of the conveying cylinder 9, the motor 13 is fixedly connected to the mounting frame 3, the output shaft of the motor 13 extends into the conveying cylinder 9 and is fixedly connected to the auger shaft 10, and the motor 13 is electrically connected to the control unit 7.

[0032] Specifically, the granules are first stored in the feeding hopper 11, which is connected to the material inlet 12 of the conveying cylinder 9 through the bottom of the hopper, allowing them to fall naturally into the conveying cylinder 9. The control unit 7 drives the motor 13 to operate based on the weight signal fed back from the weighing mechanism 2. The output shaft of the motor 13 drives the auger shaft 10 to rotate inside the conveying cylinder 9. The auger shaft 10 pushes the granules towards the material outlet 8 through its spiral blades, ultimately delivering them precisely into the weighing hopper 17 below. When the weighing sensor 14 detects that the granules are close to the target weight, the control unit 7 reduces the speed of the motor 13 to prevent over-dispensing and achieve quantitative control. This structure achieves stable and controllable dispensing of granules through auger conveying, making it particularly suitable for granules that are prone to clumping or have poor flowability, improving feeding stability and packaging accuracy.

[0033] In a preferred embodiment, such as Figure 3 As shown, the bottom side of the weighing hopper 17 has a right-angled trapezoidal cross-section; the inclined surface of the weighing hopper 17 is connected to the weighing sensor 14. The right-angled trapezoidal structure on the bottom side of the weighing hopper 17 facilitates the smooth sliding and unloading of granules under gravity, reducing residue, and also adapts to the installation angle and connection method of the weighing sensor 14. This ensures that the weighing hopper 17 is stably fixed while ensuring that the weighing sensor 14 is subjected to uniform force, improving weighing accuracy, and achieving the dual functions of smooth unloading and stable installation.

[0034] In a preferred embodiment, guide grooves are provided on both sides of the bottom of the weighing hopper 17, and the two sides of the gate 18 are slidably connected in the guide grooves. The guide grooves on both sides of the bottom of the weighing hopper 17 provide sliding tracks for the gate 18, ensuring that the gate 18 moves smoothly and without deviation when opening and closing. This ensures that the gate 18 fits tightly with the bottom of the hopper to prevent granular leakage, and also reduces sliding friction, allowing the gate 18 to move flexibly under the drive of the control cylinder 16, thereby improving the reliability of the unloading process.

[0035] In a preferred embodiment, such as Figure 1 As shown, an intermediate mechanism 6 is also provided on the mounting bracket 3 below the weighing mechanism 2; as Figure 3 as well as Figure 4As shown, the intermediate mechanism 6 includes an intermediate hopper 19, a sealing clamp 20, and a sealing cylinder 22. The intermediate hopper 19 is fixedly connected to the mounting frame 3 and faces the weighing hopper 17. The sealing clamp 20 is hinged to the bottom of the intermediate hopper 19, and the two ends of the sealing cylinder 22 are respectively hinged to the mounting frame 3 and the sealing clamp 20. The intermediate hopper 19 of the intermediate mechanism 6 receives the granules unloaded from the weighing hopper 17 to prevent them from scattering. The sealing clamp 20 opens and closes under the drive of the sealing cylinder 22, which facilitates the entry of the granules into the lower stage and can also seal the bottom to prevent leakage during the unloading gap of the weighing mechanism 2. At the same time, the opening and closing of the sealing clamp 20 can be controlled so that when the weighing mechanism 2 performs the next weighing, the intermediate hopper 19 discharges material downwards, realizing the simultaneous operation of weighing and discharging, and improving the overall work efficiency.

[0036] In a preferred embodiment, such as Figure 1 As shown, an auxiliary hopper 5 is also provided on the mounting frame 3 below the intermediate mechanism 6, and the auxiliary hopper 5 is fixedly connected to the support frame. The auxiliary hopper 5 further receives the granules falling from the intermediate mechanism 6, and through its own guiding structure, accurately guides the material into the packaging or collection device below, reducing the spillage and loss of material during the transmission process and improving the accuracy and stability of material conveying.

[0037] In a preferred embodiment, such as Figure 1 As shown, a placement seat 4 is provided on the mounting frame 3 below the auxiliary hopper 5. The placement seat 4 is used to stably place the container receiving the granules, so that it is directly facing the outlet of the auxiliary hopper 5, ensuring that the granules fall accurately into the container, avoiding material spillage caused by deviation, and improving the convenience and stability of the dispensing operation.

[0038] In a preferred embodiment, two sets of sealing clamps 20 and sealing cylinders 22 are provided, symmetrically arranged at the bottom of the intermediate hopper 19. The two symmetrically arranged sets of sealing clamps 20 and sealing cylinders 22 can open and close synchronously from both sides of the bottom of the intermediate hopper 19, enhancing the sealing effect to prevent particle leakage. Simultaneously, it ensures more even and smooth material descent during unloading, avoiding skewing or jamming caused by unilateral force, and improving the stability and reliability of the intermediate mechanism 6.

[0039] In a preferred embodiment, such as Figure 3 As shown, positioning heads 21 are fixed to both sides of the bottom of the intermediate hopper 19. The positioning heads 21 on both sides of the bottom of the intermediate hopper 19 are used to limit the opening and closing position of the closing clamp 20, ensuring that the clamp fits tightly to seal when closed, and reaches a preset angle when opened to allow the material to fall smoothly, avoiding sealing failure or jamming caused by excessive movement of the clamp, and ensuring precise and controllable operation.

[0040] In a preferred embodiment, a rubber pad is provided at the end of the positioning head 21. The rubber pad at the end of the positioning head 21 can buffer the impact force when the closing clamp 20 is closed, reduce collision wear and noise, and improve the durability of the equipment.

[0041] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A granule weighing and dispensing machine, characterized in that: It includes a mounting frame (3), a feeding mechanism (1), a weighing mechanism (2), and a control unit (7); the feeding mechanism (1), the weighing mechanism (2), and the intermediate mechanism (6) are arranged sequentially from top to bottom on the mounting frame (3); the feeding mechanism (1) is used to store granules and feed granules to the weighing mechanism (2); The feeding mechanism (1) includes a weighing hopper (17), a control cylinder (16), a weighing sensor (14), and a gate (18); a mounting plate (15) is fixedly connected to one side of the mounting frame (3), a weighing sensor (14) is set on the mounting plate (15), a weighing hopper (17) is set on the weighing sensor (14), the control cylinder (16) is fixedly connected to the weighing hopper (17), the gate (18) is slidably connected to the bottom of the weighing hopper (17), and the piston rod of the control cylinder (16) is fixedly connected to the gate (18); wherein, the weighing hopper (17) is used to receive the granules provided by the feeding mechanism (1); the control unit (7) is used to receive the signal from the weighing sensor (14) and control the feeding mechanism (1) to dispense the granules.

2. The granule weighing and dispensing machine according to claim 1, characterized in that: The feeding mechanism (1) includes a feeding hopper (11), a transmission cylinder (9), an auger shaft (10), and a motor (13); the transmission cylinder (9) is fixedly connected to the mounting frame (3), and the two sides of the transmission cylinder (9) are provided with a material inlet (12) and a material outlet (8), with the material outlet (8) facing the weighing hopper (17); the feeding hopper (11) is fixedly connected to the transmission cylinder (9), and the bottom of the feeding hopper (11) is connected to the material inlet (12); the auger shaft (10) is rotatably connected inside the transmission cylinder (9), the motor (13) is fixedly connected to the mounting frame (3), the output shaft of the motor (13) extends into the transmission cylinder (9) and is fixedly connected to the auger shaft (10), and the motor (13) is electrically connected to the control unit (7).

3. The granule weighing and dispensing machine according to claim 1, characterized in that: The cross-section of one side of the bottom of the weighing hopper (17) is a right trapezoidal structure; the inclined surface of the weighing hopper (17) is connected to the weighing sensor (14).

4. The granule weighing and dispensing machine according to claim 1, characterized in that: The bottom of the weighing hopper (17) is provided with guide grooves on both sides, and the two sides of the gate (18) are slidably connected in the guide grooves.

5. A granule weighing and dispensing machine according to claim 1, characterized in that: An intermediate mechanism (6) is also provided on the mounting frame (3) below the weighing mechanism (2); the intermediate mechanism (6) includes an intermediate hopper (19), a closed clamping plate (20) and a closed cylinder (22). The intermediate hopper (19) is fixedly connected to the mounting frame (3) and faces the weighing hopper (17); the closed clamping plate (20) is hinged to the bottom of the intermediate hopper (19), and the two ends of the closed cylinder (22) are respectively hinged to the mounting frame (3) and the closed clamping plate (20).

6. A granule weighing and dispensing machine according to claim 5, characterized in that: An auxiliary hopper (5) is also provided on the mounting frame (3) below the intermediate mechanism (6), and the auxiliary hopper (5) is fixedly connected to the support frame.

7. A granule weighing and dispensing machine according to claim 6, characterized in that: A placement seat (4) is provided on the mounting frame (3) below the auxiliary hopper (5).

8. A granule weighing and dispensing machine according to claim 5, characterized in that: There are two sets of closed clamping plates (20) and closed cylinders (22), and the two sets of closed clamping plates (20) and closed cylinders (22) are symmetrically arranged at the bottom of the intermediate hopper (19).

9. A granule weighing and dispensing machine according to claim 8, characterized in that: The bottom sides of the intermediate hopper (19) are fixed with end heads (21).

10. A granule weighing and dispensing machine according to claim 9, characterized in that: A rubber pad is provided at the end of the positioning head (21).

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