An automatic raw material dispensing mechanism
By designing a gradient hydrophobic composite material layer and multimodal vibration technology on the inner wall of the spiral conveyor component, combined with a self-cleaning component, the problem of material sticking in the automatic filling equipment was solved, achieving an efficient and stable raw material filling process and improving the quality and efficiency of electrode paste production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZUNYI ZHIDE CARBON PLASTIC PROD CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional manual feeding methods are inefficient and susceptible to human error. The screw conveyor components of automatic feeding equipment tend to stick to materials after prolonged use and are difficult to clean, resulting in decreased feeding efficiency and quality. The deterioration of the anti-stick coating also increases maintenance costs.
By employing gradient hydrophobic composite material layers, dynamic airflow regulation, and multimodal vibration technology, combined with self-cleaning components, the inner wall of the spiral conveyor component is designed. Through alternating stacking of nano-silica hydrophobic coating and polyether ether ketone wear-resistant layer, combined with piezoelectric ceramics and electromagnetic low-frequency vibrators, uniform material conveying and anti-adhesion are achieved.
It effectively reduces raw material adhesion, improves filling accuracy and speed, enhances material uniformity, extends equipment maintenance cycle, reduces maintenance costs, and ensures stable product quality.
Smart Images
Figure CN224287850U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of electrode paste production equipment, specifically to an automatic raw material dispensing mechanism. Background Technology
[0002] In electrode paste production, accurate raw material addition is crucial for the conductivity and density consistency of the final product. Traditional manual addition methods are inefficient, susceptible to human error, and labor-intensive, undoubtedly increasing production costs. Therefore, automated addition equipment relying on screw conveyor technology has emerged to improve the accuracy and efficiency of addition. These devices use a screw shaft to evenly push the raw material to the designated location. However, after prolonged use, the inner wall of the screw conveyor component often suffers from severe material buildup, reducing conveying efficiency and making cleaning difficult. This not only affects the addition speed but may also lead to a decline in the quality of the raw material.
[0003] To reduce the adhesion and accumulation of raw materials during transportation, manufacturers typically coat the inner wall of the screw conveyor with an anti-sticking material. While traditional anti-stick coatings such as silicone oil can prevent material adhesion to some extent, these coatings are prone to performance degradation over time, affecting dispensing efficiency and raw material quality. This time-deteriorating anti-stick coating not only reduces equipment efficiency but also increases maintenance costs, hindering further optimization of the electrode paste production process.
[0004] Therefore, there is an urgent need to develop a new type of filling mechanism that can effectively prevent raw material adhesion and maintain stable performance over a long period of time, so as to improve the accuracy of the raw material filling process and product quality. Utility Model Content
[0005] The purpose of this invention is to overcome the aforementioned technical difficulties. This invention provides an automatic raw material dispensing mechanism that can effectively prevent raw material adhesion and maintain stable performance over a long period of time, thereby improving the accuracy of the raw material dispensing process and product quality.
[0006] To achieve the above objectives, the technical solution adopted is as follows: an automatic raw material dispensing mechanism, including a frame, a spiral conveying component, a drive motor, and an operation controller; the inner wall of the spiral conveying component is provided with a gradient hydrophobic composite material layer, which is composed of 3-5 layers of alternating nano-silica hydrophobic coating and polyether ether ketone wear-resistant layer; the outer wall of the spiral conveying component is evenly distributed with dynamic airflow regulating components, which include adjustable angle nozzles and servo motors; the adjustable angle nozzles are driven by the servo motor to achieve continuous adjustment of the spray angle from 0 to 90°; the outer wall of the spiral conveying component is also integrated with a multimodal vibrator, which includes a piezoelectric ceramic high-frequency vibrator and an electromagnetic low-frequency vibrator; the piezoelectric ceramic high-frequency vibrator and the electromagnetic low-frequency vibrator are staggered along the axial direction of the spiral conveying component, and the vibration direction is set at an angle of 30-60° with the axis of the spiral conveying component.
[0007] Furthermore, the surface roughness Ra of the gradient hydrophobic composite material layer is ≤0.05μm, and its surface is provided with a periodic microgroove array. The depth of the microgroove array is 50-200μm, the spacing between adjacent microgrooves is 0.5-1.2mm, and the extension direction of the microgrooves is set at an angle of 15-45° with the conveying direction of the spiral conveying component.
[0008] Furthermore, the vibration frequency of the piezoelectric ceramic high-frequency vibrating component is 1000-5000Hz, and the vibration frequency of the electromagnetic low-frequency vibrating component is 20-200Hz.
[0009] Furthermore, the outlet airflow velocity of the adjustable angle nozzle is 0.5-3 m / s, and the airflow velocity and the rotational speed of the screw conveyor are controlled in conjunction with each other through a PID algorithm.
[0010] Furthermore, the feed inlet of the screw conveyor is equipped with a non-contact microwave humidity sensor, and the inner wall of the screw conveyor is also equipped with a capacitive material residue monitoring electrode. Both the microwave humidity sensor and the material residue monitoring electrode are electrically connected to the operation controller.
[0011] Furthermore, the spiral conveying component is also provided with a self-cleaning component, which includes a radially retractable polyimide scraper and a rotary ultrasonic cleaning head. The thickness of the polyimide scraper blade is 0.2-0.5 mm, and the frequency adjustment range of the ultrasonic cleaning head is 28-120 kHz.
[0012] Furthermore, the extension stroke of the polyimide scraper is 5-15mm, and the gap between the scraper tip and the surface of the gradient hydrophobic composite material layer is 0.1-0.3mm.
[0013] The automatic raw material dispensing mechanism provided by this utility model has the following beneficial effects:
[0014] This invention, by designing a gradient hydrophobic composite material layer on the inner wall of the spiral conveyor component, combined with dynamic airflow regulation and multimodal vibration technology, can effectively improve the conveying performance of raw materials, reduce material sticking, and increase conveying efficiency and material uniformity. It effectively improves the accuracy and speed of dispensing, and significantly enhances the uniformity and mixing effect of raw materials, effectively solving the problem of severe material sticking and reduced mixing quality in existing automatic dispensing mechanisms after long-term operation. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the automatic raw material dispensing mechanism of this utility model.
[0016] Figure 2 This is a cross-sectional view of the automatic raw material dispensing mechanism of this utility model.
[0017] In the diagram, 1 is the frame; 2 is the screw conveyor component; 3 is the drive motor; 4 is the operation controller; 5 is the nano-silica hydrophobic coating; 6 is the polyetheretherketone wear-resistant layer; 7 is the dynamic airflow regulating component; 8 is the piezoelectric ceramic high-frequency vibrating component; 9 is the electromagnetic low-frequency vibrating component; 11 is the microwave humidity sensor; 12 is the material residue monitoring electrode; and 13 is the self-cleaning component. Detailed Implementation
[0018] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. The described embodiments are merely some, not all, of these embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0019] like Figure 1-2 The present invention provides an automatic raw material feeding mechanism, comprising a frame 1, a screw conveyor component 2, a drive motor 3, and an operation controller 4. The operation controller 4 integrates a touchscreen and a PLC control module, and has a built-in PID algorithm program. The drive motor 3 is a variable frequency speed control motor, connected to the screw shaft of the screw conveyor component 2 via a coupling. The screw conveyor component 2 has a non-contact microwave humidity sensor 11 at its inlet, and a capacitive material residue monitoring electrode 12 on its inner wall, positioned 200mm from the end of the screw blades. Both the microwave humidity sensor 11 and the material residue monitoring electrode 12 are electrically connected to the operation controller 4. When the microwave humidity sensor 11 detects that the raw material humidity is >8%, the PID controller simultaneously increases the airflow temperature to 100℃ and reduces the screw speed by 10-15%, suppressing adhesion tendency through temperature-speed negative feedback and improving its practical performance.
[0020] The spiral conveying component 2 is further provided with a self-cleaning component 13, which includes a radially retractable polyimide scraper and a rotary ultrasonic cleaning head. The thickness of the polyimide scraper blade is 0.2-0.5 mm, the frequency adjustment range of the ultrasonic cleaning head is 28-120 kHz, the extension stroke of the polyimide scraper is 5-15 mm, which is set according to 1 / 20 of the spiral diameter, and the gap between the scraper end and the surface of the gradient hydrophobic composite material layer is 0.1-0.3 mm. This application uses PID dynamic coordination based on material residue monitoring data... According to the system, the PID parameters are automatically corrected, and the scraper extension and retraction cleaning and ultrasonic cleaning are automatically triggered to achieve closed-loop management of monitoring-control-cleaning. When the capacitive residue monitoring electrode detects that the amount of adhesion is >50g / ㎡, the polyimide scraper extends radially by 10mm to physically scrape off the blocky material. At the same time, the 80kHz rotary ultrasonic cleaning head is started to ultrasonically clean micron-level residues. After cleaning, the system automatically calibrates and resumes operation. The combination of the polyimide scraper thickness of 0.3±0.05mm and the ultrasonic frequency of 80±10kHz in this application can achieve a balance between cleaning efficiency and surface protection.
[0021] The inner wall of the spiral conveying component 2 is provided with a gradient hydrophobic composite material layer. The gradient hydrophobic composite material layer is composed of 3-5 layers of alternating stacked nano-silica hydrophobic coating 5 and polyetheretherketone wear-resistant layer 6, that is, the nano-silica hydrophobic coating 5 and polyetheretherketone wear-resistant layer 6 are alternately sprayed 3-5 times, with a total thickness of 0.4-0.6mm. After precision grinding, the surface roughness Ra≤0.05μm. The surface of the gradient hydrophobic composite material layer is laser-etched with a periodic micro-groove array (not shown in the figure). The depth of the micro-groove array is 50-200μm, the spacing between adjacent micro-grooves is 0.5-1.2mm, and the extension direction of the micro-grooves is set at an angle of 15-45° with the conveying direction of the spiral conveying component 2 to guide the material flow. According to the experimental comparison, when the micro-groove depth is 100μm and the spacing is 0.8mm, the material flow resistance can be reduced by 40%. This application preferably sets the extension direction of the microgrooves at a 30° angle to the conveying direction of the spiral conveyor component 2, utilizing the capillary effect to reduce material residence time; wherein the nano-silica hydrophobic coating 5 is sprayed onto the inner wall of the spiral component, with a single layer thickness of 80μm; the polyetheretherketone wear-resistant layer 6 has a layer thickness of 50μm. Tests show that the nano-silica hydrophobic coating 5 of this application provides superhydrophobicity combined with the polyetheretherketone wear-resistant layer 6 to ensure wear resistance, and with the capillary guiding effect of the 30° microgrooves, it can shorten the material residence time by 40% compared to the traditional spiral conveyor component 2; after 500 hours of continuous operation testing, the contact angle attenuation of the gradient hydrophobic composite material layer is <0.5°, and the wear amount is <5μm.
[0022] The outer wall of the screw conveyor component 2 is evenly distributed with dynamic airflow regulating components 7. The dynamic airflow regulating components 7 include adjustable angle nozzles and servo motors. The adjustable angle nozzles are made of brass, have an outlet diameter of 8mm, and can be equipped with built-in electric heating wires. The adjustable angle nozzles are driven by the servo motor to achieve 0-90° spray angle adjustment. When the air compressor power is 5.5kW, the airflow speed is 0.5-3m / s and the rotation speed of the screw conveyor component 2 is linked and controlled by a PID algorithm. By monitoring the rotation speed of the screw conveyor component 2 and the airflow speed of the adjustable angle nozzles in real time, the airflow speed increases exponentially with the increase of rotation speed, accurately matching the changes in material conveying volume, avoiding overshoot or lag, and preventing material accumulation.
[0023] The outer wall of the spiral conveying component 2 is also integrated with a multimodal vibrator. The multimodal vibrator covers the 20-5000Hz frequency band and includes a piezoelectric ceramic high-frequency vibrator 8 and an electromagnetic low-frequency vibrator 9. The piezoelectric ceramic high-frequency vibrator 8 and the electromagnetic low-frequency vibrator 9 are staggered along the axial direction of the spiral conveying component 2, and the vibration direction is set at an angle of 30-60° with the axial direction of the spiral conveying component 2. In this application, the piezoelectric ceramic high-frequency vibrator 8 is installed on the back of the spiral blade, and the electromagnetic low-frequency vibrator 9 is fixed to the outer wall of the conveying cylinder. The spatial misalignment between the two is ≥50mm. The start and stop sequence of the piezoelectric ceramic high-frequency vibrator 8 and the electromagnetic low-frequency vibrator 9 is dynamically allocated by a PID algorithm according to the material residue. In this application, piezoelectric ceramic high-frequency vibrators 8 are arranged in groups of 4, with each group spaced 500 mm along the spiral axis. The vibration frequency is 1000-5000 Hz, which triggers resonance and shedding of fine powder with a particle size of <1 mm. The electromagnetic low-frequency vibrators 9 and piezoelectric ceramic high-frequency vibrators 8 are staggered and spaced 250 mm apart. The vibration frequency is 20-200 Hz, and the vibration wave propagation direction is at a 45° angle to the spiral axis to avoid axial accumulation of materials. This application uses electromagnetic low-frequency vibrators 9 to remove lumpy materials through low-frequency vibration and piezoelectric ceramic high-frequency vibrators 8 to peel off fine powder through high-frequency vibration. The two operate alternately to avoid resonance cancellation.
[0024] A comparative experiment between the automatic feeding mechanism for electrode paste production provided in this application and a traditional automatic feeding mechanism revealed that the traditional conveying mechanism had a residual rate of 1.5±0.3%, a maintenance cycle of 8 hours / time, and a proportioning accuracy of ±2.5%, while the mechanism provided in this application had a residual rate of 0.3±0.05%, a maintenance cycle of 120 hours / time, and a proportioning accuracy of ±0.5%. This demonstrates that the automatic feeding mechanism for electrode paste production provided in this application, by incorporating a gradient hydrophobic composite material layer inside the spiral conveying component 2, effectively reduces adhesion and friction between raw materials during transport, thereby improving material flowability. Furthermore, the design of the dynamic airflow regulator 7 allows for flexible adjustment of the airflow direction and intensity according to raw material characteristics and production process requirements, enhancing the dispersion effect of the raw materials. Simultaneously, the application of a multimodal vibrator, particularly the combined use of a piezoelectric ceramic high-frequency vibrator 8 and an electromagnetic low-frequency vibrator 9, enables oscillation treatment of the raw materials from different angles, further promoting uniform mixing and effectively solving the problem of severe material adhesion and reduced proportioning quality that occurs after prolonged operation of existing automatic feeding mechanisms.
[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.
[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. An automatic raw material dispensing mechanism, comprising a frame (1), a screw conveyor component (2), a drive motor (3), and an operation controller (4); characterized in that: The inner wall of the spiral conveying component (2) is provided with a gradient hydrophobic composite material layer. The gradient hydrophobic composite material layer is composed of 3-5 layers of alternating stacked nano-silica hydrophobic coating (5) and polyether ether ketone wear-resistant layer (6). The outer wall of the spiral conveying component (2) is evenly distributed with dynamic airflow regulating components (7). The dynamic airflow regulating components (7) include adjustable angle nozzles and servo motors. The adjustable angle nozzles are driven by servo motors to achieve continuous adjustment of the spray angle from 0 to 90°. The outer wall of the spiral conveying component (2) is also integrated with a multimodal vibrator. The multimodal vibrator includes a piezoelectric ceramic high-frequency vibrator (8) and an electromagnetic low-frequency vibrator (9). The piezoelectric ceramic high-frequency vibrator (8) and the electromagnetic low-frequency vibrator (9) are staggered along the axial direction of the spiral conveying component (2), and the vibration direction is set at an angle of 30-60° with the axial direction of the spiral conveying component (2).
2. The automatic raw material dispensing mechanism according to claim 1, characterized in that: The surface roughness Ra of the gradient hydrophobic composite material layer is ≤0.05μm, and its surface is provided with a periodic micro-groove array. The depth of the micro-groove array is 50-200μm, the spacing between adjacent micro-grooves is 0.5-1.2mm, and the extension direction of the micro-grooves is set at an angle of 15-45° with the conveying direction of the spiral conveying component (2).
3. The automatic raw material dispensing mechanism according to claim 1, characterized in that: The vibration frequency of the piezoelectric ceramic high-frequency vibrating element (8) is 1000-5000Hz, and the vibration frequency of the electromagnetic low-frequency vibrating element (9) is 20-200Hz.
4. The automatic raw material dispensing mechanism according to claim 1, characterized in that: The outlet airflow velocity of the adjustable angle nozzle is 0.5-3m / s, and the airflow velocity and the rotation speed of the spiral conveying component (2) are controlled by a PID algorithm.
5. The automatic raw material dispensing mechanism according to claim 1, characterized in that: The feed inlet of the spiral conveyor component (2) is equipped with a non-contact microwave humidity sensor (11), and the inner wall of the spiral conveyor component (2) is also equipped with a capacitive material residue monitoring electrode (12). Both the microwave humidity sensor (11) and the material residue monitoring electrode (12) are electrically connected to the operation controller (4).
6. The automatic raw material dispensing mechanism according to claim 1, characterized in that: The spiral conveying component (2) is also provided with a self-cleaning component (13), which includes a radially retractable polyimide scraper and a rotary ultrasonic cleaning head. The thickness of the polyimide scraper blade is 0.2-0.5 mm, and the frequency adjustment range of the ultrasonic cleaning head is 28-120 kHz.
7. The automatic raw material dispensing mechanism according to claim 6, characterized in that: The polyimide scraper has a telescopic stroke of 5-15 mm, and the gap between the scraper tip and the surface of the gradient hydrophobic composite material layer is 0.1-0.3 mm.