A feeding system and control method for accurate measurement of powder materials

Abstract

The present application relates to a feeding system and control method for accurate measurement of powder materials, and relates to the technical field of masterbatch production. The feeding system includes a frame and a feeding mechanism, and the feeding mechanism includes: a raw material hopper for containing raw materials; a weighing hopper for adding raw materials into a screw extruder; a weighing component for weighing the raw materials in the weighing hopper; a control component for controlling the opening or closing of the raw material hopper and the weighing hopper; and a vibration component for vibrating the weighing hopper. The present application weighs the raw materials in the weighing hopper through the weighing component, and after weighing, the weighing component is separated from the weighing hopper, and the vibration component vibrates the weighing hopper, thereby reducing the amount of raw materials adhering to the weighing hopper, and also reducing the probability of damage to the weighing component caused by vibration, so that the subsequent weighing of the weighing component is more accurate, the accuracy of the raw materials is improved, and the quality and production efficiency of the masterbatch are improved.

Description

Technical Field

[0001] The present application relates to the technical field of masterbatch production, and in particular to a feeding system and control method for accurate powder metering. Background Art

[0002] Masterbatch, also known as color seed, is a new type of colorant for polymer materials, also known as pigment preparation. Masterbatch is mainly used in plastics. Masterbatch is composed of three basic elements: pigment or dye, carrier and additive. It is an aggregate obtained by uniformly attaching an extraordinary amount of pigment to the resin. It can be called a pigment concentrate, so its tinting power is higher than the pigment itself.

[0003] Masterbatch is mainly made of colorant, resin carrier, dispersing aid, etc. During the production process, various raw materials need to be accurately weighed and added to the screw extruder for mixing. The weighing structure is used to weigh the raw materials in the feeding structure, and then the feeding structure adds the raw materials to the screw extruder. However, since the raw materials are generally powders with adhesive properties, they are easy to adhere to the feeding structure, resulting in a decrease in the accuracy of the raw materials and a reduction in the quality of the masterbatch.

[0004] In order to reduce the sticky raw materials, the prior art generally vibrates or knocks the feeding structure, and the feeding mechanism will vibrate during the above operation, and the vibration will also be transmitted to the weighing structure, which can easily damage the weighing structure or even cause it to malfunction, thereby reducing the weighing accuracy of the weighing structure for the raw materials, resulting in a decrease in the accuracy of the raw materials and a decrease in the quality of the masterbatch. Summary of the invention

[0005] In order to improve the quality of masterbatch, the present application provides a feeding system and a control method for accurate metering of powder.

[0006] In the first aspect, the present application provides a feeding system for accurate powder measurement, which adopts the following technical solution:

[0007] A feeding system for accurate measurement of powder materials, comprising a frame, and a feeding mechanism arranged on the frame and used for feeding materials to a screw extruder, wherein the feeding mechanism comprises:

[0008] A raw material hopper is arranged on the frame and is used to contain the raw materials;

[0009] a weighing hopper, located below the raw material hopper and used to add raw materials into the screw extruder;

[0010] A weighing assembly is arranged on the screw extruder through a mounting frame and is used to weigh the raw materials in the weighing bucket;

[0011] A control component is electrically connected to the weighing component and is used to control the opening or closing of the raw material hopper and the weighing hopper. The control component controls the raw materials in the raw material hopper to be added to the weighing hopper for weighing. When the weight of the raw materials in the weighing hopper reaches a certain value, the control component controls the raw material hopper to be closed.

[0012] The vibration component is used to vibrate the symmetrical weighing bucket. When the weighing component is separated from the weighing bucket after the weighing is completed, the control component controls the weighing bucket to open and add the raw materials into the screw extruder, and at the same time the vibration component starts the symmetrical weighing bucket to vibrate; after the vibration component is completed, the weighing component moves back and presses on the weighing bucket for subsequent weighing, and the control component controls the weighing bucket to close.

[0013] By adopting the above technical solution, when raw materials need to be added, the control component controls the raw material bucket to open, the raw materials in the raw material bucket are added to the weighing bucket, and the weighing component starts to weigh the raw materials in the weighing bucket; when the required weight is reached, the raw material bucket stops adding materials, the weighing component is separated from the weighing bucket, the weighing bucket is opened to add the raw materials to the screw extruder, and the vibration component starts to vibrate the weighing bucket, so that the raw materials in the weighing bucket are quickly added to the screw extruder. After the raw materials in the weighing bucket are added, the vibration component continues to vibrate the weighing bucket for a period of time, the vibration component stops vibrating, and the weighing component continues to move back and press on the weighing bucket to facilitate subsequent weighing.

[0014] Therefore, the raw materials in the weighing bucket are weighed by the weighing component, and the weighing bucket is vibrated by the vibrating component. Before the vibration, the weighing component is separated from the weighing bucket, thereby reducing the amount of raw materials adhering to the weighing bucket, and also reducing the probability of damage to the weighing component caused by vibration, so that the subsequent weighing of the weighing component is more accurate, the accuracy of the raw materials is improved, and the quality of the masterbatch is improved. At the same time, the weighing bucket vibrates while discharging the materials, thereby reducing the time spent on the output of the raw materials in the weighing bucket, thereby improving the quality and production efficiency of the masterbatch at the same time.

[0015] Optionally, the weighing component includes:

[0016] The movable seat is slidably arranged on the frame in a direction close to or away from the weighing bucket;

[0017] A moving part, used for driving the moving seat to move;

[0018] The gravity sensor is arranged on the moving seat and is used to contact with the weighing bucket to realize weighing of the raw materials in the weighing bucket, or, after the gravity sensor completes weighing, the moving part drives the gravity sensor to separate from the weighing bucket.

[0019] By adopting the above technical solution, when vibration is required, the moving part drives the moving seat and the gravity sensor to be close to the weighing bucket, so that the gravity sensor is pressed against the weighing bucket for weighing, thereby realizing the weighing of the raw materials. After the weighing is completed, the moving part drives the moving seat and the gravity sensor away from the weighing bucket, and then the weighing bucket is vibrated, so that the weighing bucket does not contact the gravity sensor during vibration, and after the vibration is completed, the gravity sensor continues to contact the weighing bucket, thereby reducing the probability of damage to the gravity sensor and improving the quality of the masterbatch.

[0020] Optionally, the vibration direction of the vibration component symmetrically weighs the bucket and is parallel to the direction in which the raw materials are output from the weighing bucket. The weighing bucket is arranged on the frame by sliding up and down through a plurality of sliding rods. The vibration component includes:

[0021] A plurality of springs are sleeved on the plurality of sliding rods and connected to the frame and the weighing bucket and are used for buffering and supporting the weighing bucket;

[0022] A vibration motor is arranged on the frame;

[0023] The eccentric wheel is arranged on the output shaft of the vibration motor and is rotated to push the sliding rod to move up and down; the weighing bucket shown is moved down to the lowest position in the initial state.

[0024] By adopting the above technical solution, the vibration direction is parallel to the raw material output direction, which greatly reduces the resistance during raw material output, makes the raw material flow out more easily, reduces the probability of raw material adhesion, speeds up the raw material outflow efficiency, and improves the quality and production efficiency of masterbatch.

[0025] The vibration motor starts to drive the eccentric wheel to rotate, the rotation of the eccentric wheel pushes the sliding rod to move, and the movement of the sliding rod drives the weighing bucket to move up and down, so as to realize the vibration of the symmetrical weighing bucket. At the same time, after the vibration is completed, the weighing bucket can push the eccentric wheel to rotate under the action of gravity, so that the weighing bucket moves down to the lowest point, thereby reducing the force required for the vibration motor to maintain the stable state of the weighing bucket, and also reducing the probability of damage to the gravity sensor caused by the downward movement of the weighing bucket after the vibration motor loses the force on the eccentric wheel. In addition, the spring can buffer and support the weight of the symmetrical weighing bucket, thereby further reducing the required force, thereby increasing the life of the vibration motor, improving the stability during the vibration process, and improving the quality and production efficiency of the masterbatch.

[0026] Optionally, the control component includes:

[0027] The conveying pipe 1 and the conveying pipe 2 are arranged on the raw material bucket and both extend into the weighing bucket and are respectively provided with a control valve 1 and a control valve 2 electrically connected to the weighing component. The inner diameter of the conveying pipe 1 is larger than the inner diameter of the conveying pipe 2. The weight of the raw material required to be added in the weighing bucket is A. When feeding, the conveying pipe 1 and the conveying pipe 2 are opened at the same time to add the raw material. When the weighing component weighs the raw material to be B, B<A, the control valve 1 is closed, and the raw material continues to be added through the conveying pipe 2 until the weight of the raw material is A, and the control valve 2 is closed;

[0028] The feed pipe is arranged on the weighing bucket and extends into the screw extruder and is provided with a feed valve for controlling opening and closing.

[0029] By adopting the above technical solution, when adding raw materials, control valve 1 and control valve 2 are opened, and conveying pipe 1 and conveying pipe 2 are opened at the same time to add raw materials into the weighing bucket. When the weight of the raw materials is close to the required weight A of the added raw materials, the control valve is closed, so that the conveying pipe 1 with a larger diameter is closed, and the raw materials continue to be added through the conveying pipe 2 with a smaller diameter. When the added raw materials reach the required weight A, control valve 2 is closed to complete the weighing of the raw materials.

[0030] First, the raw materials are added quickly through two pipes. After the added weight approaches the required added weight, the large diameter pipe is closed, and then the raw materials are slowly added through the small diameter pipe. Therefore, while improving the adding accuracy, it can also save the time required for adding, thereby improving the quality and production efficiency of masterbatch.

[0031] Optionally, the conveying pipe 1 is arranged vertically downward and the conveying pipe 2 is inclined downward and connected with the bottom of the conveying pipe 1, a cover is arranged on the top of the weighing bucket, and the bottom of the conveying pipe 1 is slidably passed through the cover and extends into the weighing bucket.

[0032] By adopting the above technical solution, the cover can seal the top opening of the weighing hopper, and the conveying pipe is slidably arranged in the weighing hopper, so as to facilitate the addition of raw materials into the weighing hopper, and avoid the conveying pipe when the weighing hopper vibrates without driving the conveying pipe to vibrate, thereby satisfying the non-interference with the vibration of the weighing hopper while also reducing the probability of the powdered raw materials in the weighing hopper rising into the air, thereby improving the quality and production efficiency of the masterbatch.

[0033] Optionally, the weighing hopper is provided with a drying mechanism for heating and drying the raw materials, and the drying mechanism comprises:

[0034] A coating layer, covering the outer wall of the weighing bucket and used to block heat conduction;

[0035] A heating element is arranged on the coating layer and abuts against the outer side wall of the weighing bucket for heating;

[0036] The guide water absorption component is arranged on the weighing bucket and is used to guide the raw materials to the inner wall of the weighing bucket to achieve drying and to absorb evaporated water.

[0037] By adopting the above technical solution, the heating element starts to heat and keep the weighing bucket warm, so that the moisture in the raw material in the weighing bucket evaporates upward, and the moisture enters the guide water absorption component for absorption. At the same time, the guide water absorption component also guides the raw material to the inner wall of the weighing bucket, so that the raw material can be heated and dried more easily, thereby improving the drying effect of the raw material, thereby further reducing the probability of the raw material adhering to the weighing bucket, and the dried raw material can also be added to the screw extruder more quickly, thereby improving the quality and production efficiency of the masterbatch; in addition, the raw material entering the screw extruder needs to be heated, and the heating and drying here can also speed up the efficiency of subsequent heating, thereby further improving the quality and production efficiency of the masterbatch.

[0038] Optionally, the water-absorbing guide assembly comprises:

[0039] The guide round table is arranged on the weighing bucket and is in the shape of an upward convex ball and is used to guide the incoming raw materials to the inner wall of the weighing bucket for drying;

[0040] A bearing plate is detachably arranged on the lower surface of the guide truncated stage and forms a drying chamber for placing the desiccant between the bearing plate and the lower surface of the guide truncated stage, and a plurality of water holes for water to pass through are provided on the bearing plate;

[0041] The drying element is arranged on the sealing cover and is used for absorbing moisture.

[0042] By adopting the above technical solution, the raw material falls onto the guide truncated table for guidance, so that the raw material falls toward the inner wall of the weighing bucket, making the raw material closer to the inner wall of the weighing bucket, further improving the drying effect, and the water in the raw material evaporates and is absorbed by the desiccant through the water holes, while part of the water evaporates and moves upward through the gap between the guide truncated table and the weighing bucket, so that the water is absorbed by the drying element, thereby achieving the goal of guiding the raw material to the inner wall of the weighing bucket and absorbing the evaporated water, improving the drying effect of the raw material, and further reducing the probability of the raw material adhering to the weighing bucket, thereby improving the quality and production efficiency of the masterbatch.

[0043] At the same time, when the raw materials adhere to the guide round table, the vibration of the weighing bucket also drives the guide round table to vibrate up and down, causing the raw materials adhered to the guide round table to fall down. Therefore, the increase of guide round tables will not increase the adhered raw materials, thereby further improving the quality and production efficiency of masterbatch.

[0044] Optionally, the sealing cover is detachably arranged on the weighing hopper, and the drying element contains a desiccant, and the desiccant can be taken out and replaced by removing the drying element from the weighing hopper.

[0045] By adopting the above technical solution, it is convenient to replace the desiccant in the drying element, thereby improving the drying effect of the raw materials, thereby improving the quality and production efficiency of the masterbatch.

[0046] Optionally, the guide circular table is connected to the inner wall of the weighing bucket via a connecting rod, and the connecting rod and the guide circular table are both made of heat-conducting material and are used to conduct heat from the weighing bucket to the guide circular table to heat and dry the raw materials.

[0047] By adopting the above technical solution, the connecting rod can realize the installation of the guide round table. At the same time, the connecting rod can also transfer the heat on the weighing bucket to the guide round table. At the same time, the heat on the guide round table can also be transmitted to the raw materials as soon as possible. The guide round table can realize preliminary heating and drying of the raw materials in advance, thereby improving the drying effect of the raw materials and reducing the probability of the raw materials adhering to the guide round table, thereby improving the quality and production efficiency of the masterbatch.

[0048] Secondly, in order to improve the quality of masterbatch, the present application provides a control method for a feeding system.

[0049] A control method for a feeding system comprises the following steps:

[0050] Weighing: The raw material hopper adds the raw materials into the weighing hopper. The gravity sensor is used to detect the raw materials in the weighing hopper. When the weight of the raw materials in the weighing hopper reaches the specified value, the feeding is closed;

[0051] Disengagement: The moving part drives the gravity sensor to disengage from the weighing bucket;

[0052] Feeding: The weighing bucket starts to transport the raw materials into the screw extruder;

[0053] Vibration: The vibration motor starts the symmetrical weighing bucket to vibrate, so that the raw materials remaining in the weighing bucket continue to be transported to the screw extruder, and the feeding and vibration are carried out simultaneously;

[0054] Back movement: After the vibration ends, the moving part starts to drive the gravity sensor back to contact the weighing bucket, and then continues to detect the weight of the raw materials in the weighing bucket.

[0055] By adopting the above technical scheme, the original bucket adds the raw materials into the weighing bucket, and the gravity sensor detects the weight of the raw materials. When the weight reaches the required weight, the moving part drives the gravity sensor to disengage from the weighing bucket, and the weighing bucket starts to add the raw materials into the screw extruder, and the vibration motor starts the symmetrical weighing bucket to vibrate. After the vibration is completed, the moving part drives the gravity sensor to move back and press against the weighing bucket, so as to continue to weigh the raw materials in the symmetrical weighing bucket, thereby improving the quality and production efficiency of masterbatch.

[0056] In summary, the present application includes at least one of the following beneficial technical effects:

[0057] 1. The weighing component weighs the raw materials in the weighing bucket, and the vibrating component vibrates the weighing bucket. Before the vibration, the weighing component is separated from the weighing bucket, thereby reducing the amount of raw materials adhering to the weighing bucket, and also reducing the probability of damage to the weighing component caused by vibration, making the subsequent weighing of the weighing component more accurate, improving the accuracy of the raw materials, and improving the quality of the masterbatch. At the same time, the weighing bucket vibrates while discharging the materials, thereby reducing the time spent on the output of the raw materials in the weighing bucket, thereby improving the quality and production efficiency of the masterbatch at the same time;

[0058] 2. The weighing bucket is heated and kept warm by the heating element, so that the water in the raw materials in the weighing bucket evaporates upwards, and the water enters the guide water absorption component for absorption. At the same time, the guide water absorption component also guides the raw materials to the inner wall of the weighing bucket, so that the raw materials can be heated and dried more easily, thereby improving the drying effect of the raw materials, thereby further reducing the probability of the raw materials adhering to the weighing bucket, and the dried raw materials can also be added to the screw extruder faster, thereby improving the quality and production efficiency of the masterbatch; in addition, the raw materials entering the screw extruder need to be heated, and the heating and drying here can also speed up the efficiency of subsequent heating, thereby further improving the quality and production efficiency of the masterbatch. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a three-dimensional structural diagram of the feeding system;

[0060] Figure 2 It is a partial structural diagram of the feeding system;

[0061] Figure 3 It is a schematic diagram of the structure of the guided water suction component in the feeding system, in which the side wall of the symmetrical heavy bucket is cut away.

[0062] 1. Frame; 11. Mounting frame; 12. Fixing plate; 13. Feed pipe; 15. Slide ring; 16. Sealing cover; 17. Slide rod; 2. Feeding mechanism; 21. Raw material bucket; 22. Weighing bucket; 3. Weighing assembly; 31. Moving seat; 32. Moving part; 33. Gravity sensor; 34. Test bench; 4. Control assembly; 41. Delivery pipe 1; 42. Delivery pipe 2; 43. Feed pipe; 44. Control valve 1; 45. Control valve 2; 46. Feed valve; 5. Vibration assembly; 51. Spring; 52. Vibration motor; 53. Eccentric wheel; 6. Drying mechanism; 61. Coating layer; 7. Guide water absorption assembly; 71. Guide cone; 72. Carrying plate; 73. Drying part; 74. Connecting rod; 75. Water hole; 76. Accommodating chamber; 77. Accommodating hole; 8. Screw extruder. DETAILED DESCRIPTION

[0063] The following is combined with Figure 1-Figure 3This application is described in further detail.

[0064] The embodiments of the present application disclose a feeding system and a control method for accurately measuring powder materials.

[0065] Reference Figure 1 The feeding system for accurate powder measurement includes a frame 1, a feeding mechanism 2 arranged on the frame 1 and used for feeding the screw extruder 8, and the screw extruder 8 is fixedly installed on the frame 1 and is in a horizontal state.

[0066] Reference Figure 1 and Figure 2 The feeding mechanism 2 includes a raw material bucket 21, a weighing bucket 22, a weighing component 3, a control component 4, and a vibration component 5. The raw material bucket 21 is fixedly installed on the frame 1 and is loaded with raw materials; a mounting frame 11 extending to the top of the screw extruder 8 is fixedly installed on the screw extruder 8, the weighing bucket 22 is in a vertical state, and a fixed plate 12 is fixedly installed on the top outer wall. A plurality of fixed plates 12 are arranged in a circular array around the axis of the weighing bucket 22, and a sliding rod 17 in a vertical state is fixedly installed on the lower surface of each fixed plate 12. A plurality of sliding rods 17 are vertically slidably penetrated on the mounting frame 11, so as to realize the vertical sliding installation of the weighing bucket 22 on the mounting frame 11.

[0067] The weighing assembly 3 is arranged on the mounting frame 11 and is used to weigh the raw materials in the weighing bucket 22. The vibration assembly 5 is arranged on the mounting frame 11 and is used to realize vertical reciprocating vibration of the weighing bucket 22. The weighing assembly 3 is pressed against the weighing bucket 22 and is used to weigh the raw materials in the weighing bucket 22. The control assembly 4 is electrically connected to the weighing assembly 3, and the control assembly 4 is used to control the opening or closing of the raw material bucket 21 and the opening or closing of the weighing bucket 22.

[0068] The control component 4 controls the raw material hopper 21 to add the raw material into the weighing hopper 22 for weighing. When the raw material in the weighing hopper 22 reaches the required weight, the control component 4 controls the raw material hopper 21 to close, the weighing component 3 moves down and disengages from the weighing hopper 22, and the control component 4 controls the weighing hopper 22 to open and transport the raw material to the screw extruder 8, and the vibration component 5 starts to vibrate the weighing hopper 22 at the same time, so that the raw material in the weighing hopper 22 falls into the screw extruder 8 as much as possible, reducing the amount of raw material adhering to the weighing hopper 22, and the vibration can also make the raw material transportation faster, thereby improving the quality and production efficiency of the masterbatch.

[0069] The weighing assembly 3 includes a moving seat 31, a moving part 32 and a gravity sensor 33. The moving seat 31 is vertically slidably installed on the mounting frame 11. A horizontal test bench 34 is fixedly installed on the outer wall of the weighing bucket 22 and above the moving seat 31. The moving part 32 is a cylinder or an electric push rod. The moving part 32 is fixedly installed on the mounting frame 11. The moving part 32 is located below the moving seat 31 and the piston rod is vertically upward and fixedly connected to the lower surface of the moving seat 31. The moving part 32 is used to drive the moving seat 31 to move vertically. The gravity sensor 33 is fixedly installed on the upper surface of the moving seat 31.

[0070] When it is necessary to detect the weight of the raw materials, the moving part 32 starts to drive the moving seat 31 and the gravity sensor 33 to move upward, so that the detection element of the gravity sensor 33 is pressed against the test bench 34 and is used to detect the weight of the raw materials in the weighing bucket 22. At the same time, the gravity sensor 33 can also clear the detection data when the weighing bucket 22 is empty, so the weight value displayed by the gravity sensor 33 is the weight of the raw materials; when the weight detection is completed, the moving part 32 starts to drive the gravity sensor 33 to move downward and disengage from the test bench 34.

[0071] The control component 4 includes a conveying pipe 1 41, a conveying pipe 2 42, and a feed pipe 43. The tops of the conveying pipe 1 41 and the conveying pipe 2 42 are fixedly installed at the bottom of the raw material bucket 21 and are connected to the raw material bucket 21. The conveying pipe 1 41 is arranged vertically downward, and the bottom of the conveying pipe 2 42 is inclined downward and fixedly connected to the bottom of the conveying pipe 1 41. The inner diameter of the conveying pipe 1 41 is larger than the inner diameter of the conveying pipe 2 42. At the same time, a control valve 1 44 for controlling opening and closing is fixedly installed on the conveying pipe 1 41, and a control valve 2 45 for controlling opening and closing is fixedly installed on the conveying pipe 2 42. The control valve 1 44 and the control valve 2 45 are both located above the connection between the conveying pipe 1 41 and the conveying pipe 2 42.

[0072] A feed pipe 13 for adding raw materials is fixedly installed on the screw extruder 8, and the feed pipe 13 is in a vertical state. A feed pipe 43 is fixedly installed at the bottom of the weighing bucket 22, and the feed pipe 43 is vertically arranged downward and the bottom is slidably penetrated on the inner wall of the feed pipe 13. A feed valve 46 for controlling opening and closing is arranged on the feed pipe 43. Control valve 1 44, control valve 2 45 and feed valve 46 are all controlled by a control box. The gravity sensor 33 transmits the detection data to the control box, and the control box controls the opening and closing of the above three valves through the detection data.

[0073] The top of the weighing bucket 22 is fixed with a cover 16 by screws, and the axes of the cover 16, the weighing bucket 22 and the conveying pipe 41 coincide with each other. A conveying hole is coaxially opened on the cover 16, and the conveying pipe 41 is vertically slidably penetrated through the conveying hole. After the weighing bucket 22 is weighed, the feed valve 46 is opened, and the raw materials in the weighing bucket 22 are added to the screw extruder 8 through the feed pipe 43, thereby completing the feeding process.

[0074] The weight of the raw material required to be added in the weighing bucket 22 is A. When the raw material needs to be added to the weighing bucket 22, the control valve 1 44 and the control valve 2 45 control the delivery pipe 1 41 and the delivery pipe 2 42 to open at the same time to add the raw material. When the weighing component 3 weighs the raw material as B, B<A, the control valve 1 44 closes the delivery pipe 1 41, so that the raw material is added through the delivery pipe 2 42 and the control valve 2 45 is closed until the weight of the raw material is A. The values ​​of A and B are designed and controlled as needed. When the raw material is first added, it is added through two pipelines. When the weight of the raw material is infinitely close to the required weight, the delivery pipe 1 41 is closed, and then the raw material is added through the delivery pipe 2 42 with a smaller diameter, thereby saving the adding time and improving the accuracy of the raw material addition.

[0075] When the vibration component 5 is started, the weighing bucket 22 vibrates vertically back and forth, so that the vibration direction of the weighing bucket 22 is parallel to the direction in which the raw material in the weighing bucket 22 is output through the feed pipe 43; the vibration component 5 includes multiple springs 51, a vibration motor 52 and an eccentric wheel 53, and multiple springs 51 are provided and are arranged one by one with multiple sliding rods 17. The springs 51 are sleeved on the sliding rods 17 and both ends are pressed against the upper surface of the fixed plate 12 and the mounting frame 11. The vibration motor 52 is fixedly installed on the mounting frame 11 and the output shaft extends horizontally to the bottom of the sliding rod 17. The eccentric wheel 53 is eccentrically fixed on the output shaft of the vibration motor 52. The bottom ends of the multiple sliding rods 17 are connected by a sliding ring 15, and the sliding ring 15 is pressed against the eccentric wheel 53 for positioning.

[0076] The vibration motor 52 is started to drive the eccentric wheel 53 to rotate. The rotation of the eccentric wheel 53 is used to drive the sliding ring 15, multiple sliding rods 17 and the weighing bucket 22 to vibrate vertically and reciprocatingly at the same time. At the same time, in the initial state, the weighing bucket 22 moves down to the lowest point; the multiple springs 51 realize buffering when the weighing bucket 22 vibrates. Furthermore, the multiple springs 51 can also support the weighing bucket 22, reduce the pressure of the weighing bucket 22 on the eccentric wheel 53, and improve the stability of the weighing bucket 22 when it vibrates.

[0077] Reference Figure 2 and Figure 3 The weighing bucket 22 is provided with a drying mechanism 6 for heating and drying the raw materials. The drying mechanism 6 includes a covering layer 61, a heating element and a guide water absorption component 7. The covering layer 61 is fixedly mounted on the outer wall of the weighing bucket 22. The top of the covering layer 61 extends to below the fixing plate 12 and the bottom extends to the bottom of the weighing bucket 22. The heating element is a heating tube or a heating wire. The heating element is fixedly mounted on the covering layer 61, and the covering layer 61 presses the heating element against the outer wall of the weighing bucket 22 for positioning. The heating element is used to heat, insulate and dry the weighing bucket 22, thereby achieving heating, insulating and drying the raw materials in the weighing bucket 22. The covering layer 61 is used to prevent the heat generated by the heating element from moving to the outside of the weighing bucket 22.

[0078] The guide water absorption assembly 7 is arranged on the weighing bucket 22 and is used to guide the raw materials to the inner wall of the weighing bucket 22 to achieve drying and to absorb the evaporated water. The guide water absorption assembly 7 includes a guide round table 71, a bearing plate 72 and a drying member 73. The guide round table 71 is coaxially arranged with the weighing bucket 22 and is located in the weighing bucket 22. The guide round table 71 is an upward convex spherical shell structure. A connecting rod 74 extending horizontally to the inner wall of the weighing bucket 22 and fixedly connected to the inner wall of the weighing bucket 22 is fixedly installed on the outer wall of the guide round table 71, so as to achieve the fixed installation of the guide round table 71.

[0079] The connecting rod 74 and the guide table 71 are both made of heat-conducting material, which can be copper. The connecting rod 74 is used to transfer the heat on the weighing bucket 22 to the guide table 71, and the guide table 71 absorbs the heat and heats up to heat, insulate and dry the raw materials; the raw materials removed through the conveying pipe 41 fall downward to the guide table 71 for guidance, so that the raw materials are evenly distributed and then move toward the inner wall of the weighing bucket 22. The raw materials touch the inner wall of the weighing bucket 22 under the action of inertia, so as to guide the raw materials, thereby making it easier to heat the raw materials and improving the heating effect of the raw materials.

[0080] The supporting plate 72 is fixedly mounted on the lower surface of the guide truncated cone 71 by screws, and a drying chamber for placing the desiccant is formed between the supporting plate 72 and the lower surface of the guide truncated cone 71. A plurality of water holes 75 for water to pass through are evenly opened on the supporting plate 72. The evaporated water in the raw material enters through the water holes 75 and is absorbed by the desiccant.

[0081] The drying member 73 is fixedly mounted on the lower surface of the cover 16, and a receiving cavity 76 for placing the desiccant is formed on the inner wall of the drying member 73. A receiving hole 77 connected to the receiving cavity 76 is opened on the drying member 73. The drying member 73 is located above the guide cone 71 and abuts against the inner wall of the weighing bucket 22. The drying member 73 is in an open state on the side close to the inner wall of the weighing bucket 22. When the cover 16 is removed from the weighing bucket 22, the desiccant can be replaced through this opening. After the cover 16 is installed, the inner wall of the weighing bucket 22 can block the opening and prevent the desiccant from falling.

[0082] The working principle of the embodiment of the present application is as follows:

[0083] The gravity sensor 33 rests on the test bench 34, and the conveying pipe 1 41 and the conveying pipe 2 42 are opened to add the raw materials into the weighing bucket 22. When the raw materials in the weighing bucket 22 are close to the required weight, the conveying pipe 1 41 is closed, and the raw materials continue to be added into the weighing bucket 22 through the conveying pipe 2 42 until the raw materials in the weighing bucket 22 reach the required weight, and the conveying pipe 2 42 is closed, thereby realizing the weighing of the raw materials.

[0084] The moving part 32 starts to drive the gravity sensor 33 to move downward and disengage from the test bench 34, the feed valve 46 opens, and the raw materials in the weighing bucket 22 are added to the screw extruder 8 through the feed pipe 43. At the same time, the vibration motor 52 starts to make the weighing bucket 22 vibrate vertically back and forth, thereby reducing the amount of raw materials adhering to the weighing bucket 22 and shortening the time for adding the raw materials. After the addition is completed, the vibration motor 52 stops vibrating, and then the moving part 32 starts to drive the gravity sensor 33 to press against the test bench 34, and the feed valve 46 is closed, thereby facilitating the weighing and feeding of subsequent raw materials, thereby improving the quality and production efficiency of the masterbatch.

[0085] Reference Figure 1 and Figure 2 , the control method comprises the following steps:

[0086] Weighing: The raw material hopper 21 adds the raw material into the weighing hopper 22. The gravity sensor 33 is used to detect the weight of the raw material in the weighing hopper 22. When the weight of the raw material in the weighing hopper 22 reaches a specified value, the feeding is closed;

[0087] Disengagement: The moving member 32 drives the gravity sensor 33 to disengage from the weighing bucket 22;

[0088] Feeding: The weighing bucket 22 is started to transport the raw materials into the screw extruder 8;

[0089] Vibration: The vibration motor 52 starts to vibrate the weighing bucket 22, and the feeding and vibration are carried out simultaneously, thereby reducing the amount of raw materials adhering to the weighing bucket 22, and also shortening the time spent on adding raw materials;

[0090] Back movement: After the vibration ends, the moving member 32 starts to drive the gravity sensor 33 to move back and contact the weighing bucket 22, and then continues to detect the weight of the raw materials in the weighing bucket 22.

[0091] The working principle of the embodiment of the present application is as follows:

[0092] The raw material hopper 21 adds the raw material into the weighing hopper 22, and the gravity sensor 33 is used to detect the weight of the raw material in the weighing hopper 22. When the weight of the raw material in the weighing hopper 22 reaches a specified value, the feed is closed; the moving part 32 drives the gravity sensor 33 to disengage from the weighing hopper 22; the weighing hopper 22 starts to transport the raw material to the screw extruder 8; at the same time, the vibration motor 52 starts to vibrate the weighing hopper 22, thereby reducing the amount of raw material adhering to the weighing hopper 22, and also shortening the time spent on adding the raw material. After the vibration is completed, the moving part 32 starts to drive the gravity sensor 33 to move back and contact the weighing hopper 22, and then continues to detect the weight of the raw material in the weighing hopper 22, thereby improving the quality and production efficiency of the masterbatch.

[0093] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A feeding system for accurate measurement of powder materials, characterized by: It comprises a frame (1), and a feeding mechanism (2) arranged on the frame (1) and used for feeding materials to a screw extruder (8), wherein the feeding mechanism (2) comprises: A raw material hopper (21), arranged on the frame (1) and used for containing raw materials; A weighing hopper (22) located below the raw material hopper (21) and used to add the raw material into the screw extruder (8); A weighing assembly (3) is arranged on the screw extruder (8) via a mounting frame (11) and is used to weigh the raw materials in the weighing bucket (22); A control component (4) is electrically connected to the weighing component (3) and is used to control the opening or closing of the raw material hopper (21) and the opening or closing of the weighing hopper (22). The control component (4) controls the raw material in the raw material hopper (21) to be added to the weighing hopper (22) for weighing. When the weight of the raw material in the weighing hopper (22) reaches a certain value, the control component (4) controls the raw material hopper (21) to be closed. The vibration component (5) is used to vibrate the symmetrical weighing bucket (22). When the weighing component (3) is separated from the weighing bucket (22) after weighing, the control component (4) controls the weighing bucket (22) to open and add raw materials into the screw extruder (8). At the same time, the vibration component (5) starts the symmetrical weighing bucket (22) to vibrate. After the vibration of the vibration component (5) is completed, the weighing component (3) moves back to press against the weighing bucket (22) for subsequent weighing and the control component (4) controls the weighing bucket (22) to close. The vibration direction of the vibration component (5) for the weighing bucket (22) is parallel to the direction in which the raw materials in the weighing bucket (22) are output; the weighing bucket (22) is arranged on the frame (1) to slide up and down via a plurality of sliding rods (17); the vibration component (5) comprises: A plurality of springs (51) are sleeved on the plurality of sliding rods (17) and connected to the frame (1) and the weighing bucket (22) and used to provide buffering and support for the weighing bucket (22); A vibration motor (52) is arranged on the frame (1); The eccentric wheel (53) is arranged on the output shaft of the vibration motor (52) and is rotated to push the sliding rod (17) to move up and down; the weighing bucket (22) is shown to move down to the lowest position in the initial state; The control component (4) comprises: A conveying pipe 1 (41) and a conveying pipe 2 (42) are arranged on the raw material hopper (21) and both extend into the weighing hopper (22) and are respectively provided with a control valve 1 (44) and a control valve 2 (45) electrically connected to the weighing assembly (3); the inner diameter of the conveying pipe 1 (41) is larger than the inner diameter of the conveying pipe 2 (42); the weight of the raw material required to be added in the weighing hopper (22) is A, and when feeding, the conveying pipe 1 (41) and the conveying pipe 2 (42) are opened at the same time to add the raw material; when the weighing assembly (3) weighs the raw material to be B, B<A, the control valve 1 (44) is closed, and the raw material continues to be added through the conveying pipe 2 (42) until the weight of the raw material is A, and the control valve 2 (45) is closed; A feed pipe (43) is arranged on the weighing hopper (22) and extends into the screw extruder (8) and is provided with a feed valve (46) for controlling opening and closing.

2. A powder material accurate metering feeding system according to claim 1, characterized in that: The weighing component (3) comprises: A movable seat (31) is slidably disposed on the frame (1) in a direction approaching or moving away from the weighing bucket (22); A moving member (32) for driving the moving seat (31) to move; The gravity sensor (33) is arranged on the movable seat (31) and is used to contact the weighing bucket (22) to achieve symmetrical weighing of the raw materials in the weighing bucket (22); or, after the gravity sensor (33) completes weighing, the movable member (32) drives the gravity sensor (33) to separate from the weighing bucket (22).

3. A powder material accurate metering feeding system according to claim 1, characterized in that: The conveying pipe 1 (41) is arranged vertically downward and the conveying pipe 2 (42) is inclined downward and communicated with the bottom of the conveying pipe 1 (41). A cover (16) is arranged on the top of the weighing bucket (22). The bottom of the conveying pipe 1 (41) is slidably inserted into the cover (16) and extends into the weighing bucket (22).

4. A powder material accurate metering feeding system according to claim 3, characterized in that: The weighing hopper (22) is provided with a drying mechanism (6) for heating and drying the raw materials. The drying mechanism (6) comprises: A coating layer (61) coated on the outer wall of the weighing bucket (22) and used to block heat conduction; A heating element, disposed on the coating layer (61) and resting against the outer wall of the weighing hopper (22) for heating; The guide water absorption component (7) is arranged on the weighing bucket (22) and is used to guide the raw materials to the inner wall of the weighing bucket (22) to achieve drying and to absorb evaporated water.

5. A powder material accurate metering feeding system according to claim 4, characterized in that: The water-absorbing guide component (7) comprises: A guide truncated platform (71) is disposed on the weighing bucket (22) and is in the shape of an upward convex ball and is used to guide the incoming raw materials to the inner wall of the weighing bucket (22) for drying; A carrying plate (72) is detachably arranged on the lower surface of the guide truncated platform (71) and forms a drying chamber for placing the desiccant between the carrying plate (72) and the lower surface of the guide truncated platform (71), wherein a plurality of water holes (75) for water to pass through are formed on the carrying plate (72); The drying element (73) is arranged on the sealing cover (16) and is used to absorb moisture.

6. A powder material accurate metering feeding system according to claim 5, characterized in that: The sealing cover (16) is detachably arranged on the weighing bucket (22); a desiccant is contained in the drying element (73); and the desiccant can be taken out and replaced by removing the drying element (73) from the weighing bucket (22).

7. A powder material accurate metering feeding system according to claim 5, characterized in that: The guide truncated platform (71) is connected to the inner wall of the weighing bucket (22) via a connecting rod (74); the connecting rod (74) and the guide truncated platform (71) are both made of heat-conducting material and are used to conduct heat from the weighing bucket (22) to the guide truncated platform (71) to heat and dry the raw materials.

8. A control method using the feeding system according to any one of claims 1 to 7, characterized in that: The following steps are involved: Weighing: The raw material hopper (21) adds the raw material into the weighing hopper (22), and the gravity sensor (33) is used to detect the raw material in the weighing hopper (22). When the weight of the raw material in the weighing hopper (22) reaches a specified value, the feeding is closed; Disengagement: the moving member (32) drives the gravity sensor (33) to be separated from the weighing bucket (22); Feeding: The weighing hopper (22) is started to transport the raw materials into the screw extruder (8); Vibration: The vibration motor (52) starts the weighing bucket (22) to vibrate, so that the raw materials remaining in the weighing bucket (22) continue to be transported to the screw extruder (8), and the feeding and vibration are carried out simultaneously; Return movement: After the vibration ends, the moving member (32) starts to drive the gravity sensor (33) to return and contact the weighing bucket (22), and then continues to detect the weight of the raw materials in the weighing bucket (22).

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