A plastic particle quantitative discharging device

Abstract

The utility model belongs to blanking device technical field especially for a kind of plastic granule ration blanking device, including multiple for storing material's hopper and installing in the hopper below and for the material in the hopper is sent to the spiral conveyor of mixing equipment and installs the weigher below the hopper outlet of spiral conveyor, still include controller and install the frame of weigher top, the frame is close to the side of mixing equipment and is equipped with control material valve, the output end of weigher is connected with the signal input end of controller, when weigher monitors the material in the frame to approach this material preset each time blanking amount, the controller controls the running speed of spiral conveyor slows down, when the weighing monitor monitors the material in the frame reaches this material preset each time blanking amount, the controller controls spiral conveyor to stop running, and controls control material valve to open, so that the material in the frame enters mixing equipment, reduces inertia and causes excessive blanking.

Description

Technical Field

[0001] This utility model belongs to the technical field of feeding devices, specifically relating to a quantitative feeding device for plastic granules. Background Technology

[0002] In the field of plastic granule mixing and processing, precise quantitative feeding is a key step in ensuring product quality and production efficiency. Existing plastic granule quantitative feeding devices typically include multiple hoppers, a screw conveyor, a weighing device, and mixing equipment (such as a mixing drum, a rotating shaft, and a mixing paddle). Their working principle is as follows: various types of plastic granules are separately fed into each hopper, and the material is conveyed to the weighing device via the screw conveyor. When the weighing device detects that the material weight has reached a preset value, the screw conveyor stops operating, and the weighed material is then fed into the mixing equipment for stirring and mixing.

[0003] However, existing technology has the following drawbacks: when the weighing device detects that the material weight is close to the preset value, the screw conveyor stops operating. However, because a certain amount of material remains inside the screw conveyor, when the screw conveyor stops operating, the plastic particles at the screw conveyor's discharge port may fall onto the weighing device due to inertia, causing the actual weighing value to exceed the preset value. At this time, the excess material needs to be manually removed, which not only increases the complexity of operation but also reduces production efficiency. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a quantitative feeding device for plastic granules, thereby solving the problems mentioned in the background art.

[0005] This utility model provides a quantitative feeding device for plastic granules, including multiple hoppers for storing materials, a screw conveyor installed below the hoppers for conveying the materials in the hoppers to a mixing device, and a weighing device installed below the discharge port of the screw conveyor. It also includes a controller and a frame installed on top of the weighing device, which has an open receiving space. A material control valve is installed on the side of the frame near the mixing device. The output end of the weighing device is connected to the signal input end of the controller to provide the controller with a weight signal of the material contained in the frame. When the weighing device detects that the material in the frame is close to the preset discharge amount, the controller controls the screw conveyor to slow down. When the weighing device detects that the material in the frame has reached the preset discharge amount, the controller controls the screw conveyor to stop running and controls the material control valve to open, allowing the material in the frame to enter the mixing device.

[0006] Preferably, the material control valve includes a discharge port opened on the side wall of the frame, a support frame installed on the side wall of the frame and having an electric telescopic rod installed at its bottom, and a material control plate fixedly installed at the end of the electric telescopic rod for controlling the opening and closing of the discharge port.

[0007] Preferably, a guide plate is fixedly installed on the inner bottom wall of the frame, and the thickness of the guide plate gradually decreases from the side away from the material control plate to the side closer to the material control plate.

[0008] Preferably, the screw conveyor includes a conveying pipe, a screw shaft, and a first motor. The screw shaft is installed inside the conveying pipe, the first motor is connected to the screw shaft and drives the screw shaft to rotate, and the first motor is electrically connected to the controller and its operating speed is controlled by the controller.

[0009] Preferably, a flow regulating valve is provided at the bottom outlet of the hopper, and the flow regulating valve is electrically connected to the controller to further precisely control the flow rate of material entering the screw conveyor.

[0010] Preferably, each of the hoppers is equipped with a stirring assembly, which includes a second motor mounted on the top of the hopper and a stirring paddle connected to the output shaft of the second motor for stirring the material in the hopper.

[0011] Preferably, the inner wall of the frame and the surface of the guide plate are coated with an anti-stick coating.

[0012] The beneficial effects of this utility model are as follows: the weighing device monitors the weight of the material inside the frame in real time, and the controller dynamically adjusts the speed of the screw conveyor to ensure that the amount of material fed each time accurately matches the preset value, avoiding human operation errors. When the weighing device detects that the material inside the frame is close to the target feeding amount, it automatically slows down to reduce excessive feeding caused by inertia and shorten the recalibration time. When the weighing device detects that the material inside the frame has reached the preset feeding amount for each time, the controller controls the screw conveyor to stop running and controls the material control valve to open, so that the material inside the frame enters the mixing equipment. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the planar structure of the present invention;

[0015] Figure 3 This is a top view of the structure of this utility model;

[0016] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0017] In the diagram: 1. Hopper; 2. Mixing equipment; 3. Screw conveyor; 4. Weighing device; 5. Controller; 6. Frame; 7. Material control valve; 8. Discharge port; 9. Electric telescopic rod; 10. Support frame; 11. Material control plate; 12. Guide plate; 13. Conveying pipe; 14. Screw shaft; 15. First motor; 16. Flow regulating valve; 17. Second motor; 18. Agitator. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0019] This utility model relates to a conventional plastic granule quantitative feeding device, which mainly includes multiple hoppers 1 for storing materials, a screw conveyor 3 installed below the hoppers 1 for conveying the materials in the hoppers 1 to a mixing device 2, and a weighing device 4 installed below the discharge port of the screw conveyor 3. The mixing device 2 mainly consists of a mixing drum located below the multiple feeding devices, a rotating shaft rotatably connected inside the mixing drum, mixing paddles evenly installed on the outside of the rotating shaft, and a motor located below the mixing drum for driving the rotating shaft. In use, the required total amount of material is pre-added to each hopper 1. In this utility model... The material is plastic granules. When mixing various plastic granules, the screw conveyor 3 is started simultaneously, so that the plastic granules in the hopper 1 are conveyed to the mixing equipment 2 through the screw conveyor 3. The plastic granules fall from the discharge port of the screw conveyor 3 onto the weighing device 4, and are weighed by the weighing device 4. When the weight sensor in the weighing device 4 detects that the weight has reached the preset value, the screw conveyor 3 stops conveying plastic granules. Then, the weighed plastic granules are put into the mixing drum, the motor is turned on, and the motor drives the rotating shaft to rotate, so that the various plastic granules are mixed evenly. The above is an introduction to the existing plastic granule quantitative feeding device.

[0020] As can be seen from the above, the existing plastic granule quantitative feeding device has the following defects when in use: although the weighing device 4 can measure the amount of each plastic granule fed each time, in the above process, when the weighing device 4 detects that the amount of plastic granules fed onto the weighing device 4 has reached the preset threshold, the screw conveyor 3 can only stop running. However, since the screw conveyor 3 has a certain length, when the screw conveyor 3 stops running, the plastic granules at the feeding port of the screw conveyor 3 may fall onto the weighing device 4 due to inertia, causing the amount of plastic granules on the weighing device 4 to exceed the preset amount of plastic granules. The excess plastic granules need to be removed manually, which reduces the efficiency of plastic granule processing. Based on the above problems, the present invention adopts the following improvement method to solve them.

[0021] like Figure 1-4As shown, a plastic granule quantitative feeding device, based on existing technology, has a frame 6 with a control valve 7 installed on the top of each weighing device 4. The control valve 7 is located on the side of the frame 6 near the mixing device 2. The control valve 7 includes a discharge port 8 opened on the side wall of the frame 6, a support frame 10 installed on the side wall of the frame 6 with an electric telescopic rod 9 installed at its bottom, and a control plate 11 fixedly installed at the end of the electric telescopic rod 9 for controlling the opening and closing of the discharge port 8. It is connected to the weighing device 4 and the electric telescopic rod 9 in the control valve 7 via a controller 5. Figure 1As shown, this technical solution takes the need to mix three types of plastic granules evenly as an example. The number of feeding devices (hopper 1, screw conveyor 3, weighing device 4, and frame 6) is set to three sets. The required total amount of the three types of plastic granules is respectively fed into each hopper 1. At the same time, a flow regulating valve 16 is installed at the bottom of the hopper 1. When the mixing of plastic granules has not started, the flow regulating valve 16 is closed, so that the plastic granules are stored in the hopper 1. When the weighing device 4 detects that the material in the frame 6 is close to the preset amount of material to be fed each time, the controller 5 controls the running speed of the screw conveyor 3 to decrease. Slow down to reduce excessive feeding due to inertia. When the weighing device 4 detects that the plastic particles in the frame 6 have reached the preset feeding amount for each material, the controller 5 controls the screw conveyor 3 to stop running and controls the material control valve 7 to open, so that the plastic particles in the frame 6 enter the mixing device 2. Specifically, when mixing the three types of plastic particles, assuming that the total amount of the first type of plastic particles required is 80 grams, the total amount of the second type of plastic particles required is 60 grams, and the third type of plastic particles is 30 grams, the above three types of plastic particles are fed in three batches. The feeding amount of the first type of plastic particles each time is 80 grams × 1 / 3 ≈ 26.The first type of plastic granules weighs 67 grams. The second type of plastic granules is fed in batches of 60 grams × 1 / 3 = 20 grams each time. The third type of plastic granules is fed in batches of 30 grams × 1 / 3 = 67 grams each time. The three types of plastic granules are fed in batches of 10 grams each, with the feeding amount set to the weighing threshold of the three weighing devices 4. During each feeding, when the weighing device 4 measures approximately 20 grams of the first type of plastic granule, the controller 5 slows down the operation of the screw conveyor 3 conveying the material and simultaneously reduces the opening of the flow regulating valve 16, decreasing the amount of plastic granules fed from the hopper 1 to the screw conveyor 3. When the weighing device 4 measures an increase of 26 grams of the first type of plastic granule, the controller 5 stops the screw conveyor 3 and controls the electric telescopic rod 9 to move the control plate 11 upwards, opening the discharge port 8 so that the first plastic granules in the frame 6 enter the mixing drum. When the weighing device 4 measures approximately 15 grams of the second type of plastic granule, the controller 5 slows down the operation of the screw conveyor 3 conveying the material and simultaneously reduces the opening of the flow regulating valve 16, decreasing the amount of plastic granules fed from the hopper 1 to the screw conveyor 3. Regarding particle size distribution, when the weighing device 4 detects that the weight of the second type of plastic particles has increased to 20 grams, the controller 5 stops the screw conveyor 3 that is conveying the material and controls the electric telescopic rod 9 to move the control plate 11 upward, opening the discharge port 8 so that the second plastic particles in the frame 6 enter the mixing drum. When the weighing device 4 detects that the weight of the third type of plastic particles is approximately 5 grams, the controller 5 slows down the operation of the screw conveyor 3 that is conveying the material and simultaneously controls the flow regulating valve 16 to reduce its opening, thus reducing the amount of plastic particles conveyed from the hopper 1 to the screw conveyor 3. When the weighing device 4 detects that the weight of the third type of plastic particles has increased to 10 grams, the controller 5 stops the screw conveyor 3 that is conveying the material and controls the electric telescopic rod 9 to move the control plate 11 upward, opening the discharge port 8 so that the third plastic particles in the frame 6 enter the mixing drum. This technical solution improves the accuracy of the weighing device 4 in measuring plastic particles.

[0022] Furthermore, such as Figure 1-4 As shown, to facilitate the flow of plastic granules from the frame 6 into the mixing drum, a guide plate 12 is fixedly installed on the bottom wall of the frame 6. The thickness of the guide plate 12 gradually decreases from the side away from the control plate 11 to the side closer to the control plate 11, which can guide the plastic granules in the frame 6 and prevent them from being stuck in the frame 6 during feeding. At the same time, the inner wall of the frame 6 and the surface of the guide plate 12 are coated with an anti-stick coating. The anti-stick coating can be an organosilicon anti-stick coating, a fluorocarbon anti-stick coating, etc., which can reduce the resistance of the material during the feeding process, prevent plastic granules from remaining in the frame 6 and affecting the accuracy of feeding. In addition, the coating material is resistant to acids and alkalis, which can also extend the service life of the frame 6 and reduce maintenance costs.

[0023] Furthermore, such as Figure 4As shown, in order to avoid affecting the uniformity of plastic granule feeding, a stirring assembly is installed in the hopper 1. The stirring assembly includes a second motor 17 installed on the top of the hopper 1 and a stirring paddle 18 connected to the output shaft of the second motor 17 and used to stir the material in the hopper 1. When the second motor 17 drives the stirring paddle 18 to rotate continuously, the plastic granules are stirred to prevent the plastic granules from clumping or bridging in the hopper 1 and to ensure that the material falls smoothly.

[0024] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of this utility model. The above examples are merely to aid in understanding the method and core ideas of this utility model. The above descriptions are only preferred embodiments of this utility model. It should be pointed out that, due to the limitations of written expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or variations can be made without departing from the principles of this utility model, and the above technical features can be combined in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this utility model.

Claims

1. A plastic granule quantitative feeding device, comprising a plurality of hoppers (1) for storing materials, a screw conveyor (3) installed below the hoppers (1) for conveying the materials in the hoppers (1) to a mixing device (2), and a weighing device (4) installed below the discharge port of the screw conveyor (3), characterized in that: It also includes a controller (5) and a frame (6) mounted on top of the weighing device (4) and having an open-type receiving space. A material control valve (7) is installed on the side of the frame (6) near the mixing device (2). The output end of the weighing device (4) is connected to the signal input end of the controller (5) to provide the controller (5) with the weight signal of the material contained in the frame (6). When the weighing device (4) detects that the material in the frame (6) is close to the preset amount of material to be discharged each time, the controller (5) controls the running speed of the screw conveyor (3) to slow down. When the weighing device (4) detects that the material in the frame (6) has reached the preset amount of material to be discharged each time, the controller (5) controls the screw conveyor (3) to stop running and controls the material control valve (7) to open, so that the material in the frame (6) enters the mixing equipment (2). The material control valve (7) includes a discharge port (8) opened on the side wall of the frame (6), a support frame (10) installed on the side wall of the frame (6) and an electric telescopic rod (9) installed at its bottom, and a material control plate (11) fixedly installed at the end of the electric telescopic rod (9) for controlling the opening and closing of the discharge port (8).

2. The plastic granule quantitative feeding device according to claim 1, characterized in that: A guide plate (12) is fixedly installed on the inner bottom wall of the frame (6). The thickness of the guide plate (12) gradually decreases from the side away from the control plate (11) to the side close to the control plate (11).

3. The plastic granule quantitative feeding device according to claim 1, characterized in that: The screw conveyor (3) includes a conveying pipe (13), a screw shaft (14) and a first motor (15). The screw shaft (14) is installed inside the conveying pipe (13). The first motor (15) is connected to the screw shaft (14) and drives the screw shaft (14) to rotate. The first motor (15) is electrically connected to the controller (5) and its operating speed is controlled by the controller (5).

4. The plastic granule quantitative feeding device according to claim 1, characterized in that: The bottom outlet of the hopper (1) is provided with a flow regulating valve (16), which is electrically connected to the controller (5) for further precise control of the flow rate of material entering the screw conveyor (3).

5. The plastic granule quantitative feeding device according to claim 1, characterized in that: Each of the hoppers (1) is equipped with a stirring assembly, which includes a second motor (17) mounted on the top of the hopper (1) and a stirring paddle (18) connected to the output shaft of the second motor (17) for stirring the material in the hopper (1).

6. The plastic granule quantitative feeding device according to claim 2, characterized in that: The inner wall of the frame (6) and the surface of the guide plate (12) are coated with an anti-stick coating.

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