Automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment

Abstract

This invention relates to an automatic weighing system for piezoelectric ceramic synthesis in high-throughput equipment, belonging to the field of weighing device technology. It includes a support platform with a collector at its center. Several weighing units are arranged around the collector on the support platform. Each weighing unit includes a discharge chute arranged in a V-shape, with its outlet extending above the collector. A hopper is connected above the discharge chute. This invention solves the problems of traditional technologies where piezoelectric ceramic powder is prone to agglomeration, leading to uneven material distribution due to the screw conveyor method, which is suitable for weighing large quantities of materials but not for weighing small amounts of additives and is prone to cross-contamination; and the inability to simultaneously weigh small doses of additives and large doses of powder, resulting in poor dosage compatibility of the weighing equipment.

Description

Technical Field

[0001] This invention relates to the field of weighing device technology, and more specifically to an automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment. Background Technology

[0002] With the development of electronic technology, piezoelectric ceramic products have been widely used in various fields, such as precision mechanics and mechanical engineering, life sciences, medicine and biology, pneumatic / hydraulic valves, nano-positioning / high-speed switches, and active and adaptive optics. Currently, the main preparation method for piezoelectric ceramics is solid-state sintering, which has the advantages of simple process, easy material adjustment, and suitability for large-scale production. As the industry's performance requirements for piezoelectric ceramic products continue to increase, single-layer piezoelectric ceramic products are evolving towards multi-layer structures. The most suitable preparation method is tape casting. Tape casting is a ceramic material forming method that mainly involves mixing ceramic powder with various additives to obtain a uniform and stable slurry, and then preparing a ceramic film of a certain thickness on a tape casting machine. Tape casting technology is widely used in the production of various ceramic samples due to its simple preparation process, high production efficiency, and good product quality. Piezoelectric ceramics prepared by casting technology have a series of advantages such as large size, uniform properties, and high product efficiency. As can be seen from the casting process, the most critical influencing factor is the powder used as raw material. Especially when casting piezoelectric products, due to the high specific gravity of piezoelectric ceramic powder, it is easy to settle and agglomerate. This agglomeration is also difficult to break up when ball milling is used to prepare the casting slurry, which often leads to problems such as cracking, pinholes, or even failure to form the film.

[0003] Due to their high density, tendency to agglomerate, and hygroscopic properties, piezoelectric ceramic powders (such as lead-based powders) are not suitable for weighing by existing high-throughput automated weighing equipment.

[0004] The prior art discloses a patent with publication number CN114526798A entitled "A Powder Weighing Mechanism and a Multi-Part Magnetic Press with the Same Mechanism." The powder weighing mechanism employs a one-time pull-plate main feeding system combined with an electromagnetic vibration feeder for supplementary feeding, significantly improving the efficiency of accurate powder weighing. It is suitable for powder molding applications such as ceramics, hard alloys, metal structural parts, and ferrite magnetic materials, and is particularly suitable for multi-part magnetic presses. The multi-part magnetic press divides the feeding chamber of the feeding mechanism into multiple feeding compartments corresponding to each mold cavity, ensuring consistent magnetic powder weight across all cavities. This saves magnetic powder and solves the problem of low efficiency in automatic accurate weighing of existing powder weighing mechanisms, as well as the problem of large weight errors in magnetic powder within mold cavities caused by the use of constant-volume feeding due to low efficiency in automatic accurate weighing of magnetic powder in multi-part magnetic presses.

[0005] Existing devices, including those mentioned above, have gradually revealed shortcomings in the technology with use, mainly in the following aspects: First, due to the special characteristics of piezoelectric ceramic powder, it is prone to agglomeration. Agglomeration of piezoelectric ceramic powder leads to cavities at the bottom of the silo. When using screw conveyor, material tends to accumulate and press between the outlet ends, resulting in uneven feeding, no material output, and poor weighing accuracy.

[0006] Secondly, the powder is prone to moisture absorption. Currently, there is a lack of effective measures to prevent moisture absorption in piezoelectric ceramic powders. After the powder absorbs moisture, its performance is not only damaged, but also the product quality is affected.

[0007] Third, the traditional screw conveyor method is inconvenient to observe and is prone to blockage in the pipeline, which directly affects the accuracy of subsequent weighing.

[0008] Fourth, the efficiency is low when weighing multiple powders and multiple additives separately. Since the amount of additives used is relatively small, the traditional screw conveyor method is suitable for weighing large quantities of materials, but not suitable for weighing additives with small amounts, and it is easy to have cross-contamination. Fifth, existing piezoelectric ceramic powder weighing equipment cannot simultaneously weigh small doses of additives and large doses of powder, resulting in poor dosage compatibility.

[0009] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0010] To address the shortcomings of existing technologies, this invention provides an automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment. This system solves the problems of uneven feeding caused by the easy agglomeration of piezoelectric ceramic powder in traditional technologies, the tendency for material to accumulate and pressurize at the outlet using screw conveying, the unsuitability of traditional screw conveying for weighing large quantities of materials, the risk of cross-contamination, and the inability to simultaneously weigh small doses of additives and large doses of powder due to poor dosage compatibility of the weighing equipment.

[0011] To achieve the above objectives, the present invention provides the following technical solution: An automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment includes a support platform. A collector is located in the middle of the support platform. Several weighing units are arranged around the collector on the support platform. Each weighing unit includes a discharge trough arranged in a V-shape. The outlet of the discharge trough extends to the top of the collector. A hopper is connected above the discharge trough.

[0012] As an optimized solution, the top of the hopper is detachably connected to a hopper cover, and an inert gas pipe is connected to the hopper cover.

[0013] As an optimized solution, the lower end of the hopper is provided with a discharge port, and an ultrasonic screening machine is fixedly connected to the outer wall of the discharge port. The drive end of the ultrasonic screening machine extends into the discharge port and is fixedly connected to a screen plate.

[0014] As an optimized solution, the discharge port is also fitted with a vertically sliding discharge bayonet, the lower end of which extends into the discharge trough.

[0015] As an optimized solution, the material feeding bay has discharge ports inclinedly opened on opposite side walls, and the inclination direction of the discharge ports matches the inclined inner wall of the discharge trough.

[0016] As an optimized solution, a fastening bolt is threaded onto the outer wall of the feeding port, and a sliding hole is vertically opened at the top of the feeding bayonet. The fastening bolt is constrained in the sliding hole, and the shank end of the fastening bolt abuts against the outer wall of the feeding bayonet.

[0017] As an optimized solution, a transparent acrylic cover is fixed to the top of the discharge trough.

[0018] As an optimized solution, the transparent acrylic cover plate has an opening with an outer diameter larger than the material feeding bayonet, and the lower end of the material feeding bayonet passes through the opening.

[0019] As an optimized solution, the discharge trough is supported on an elastic bracket, and a pneumatic hammer is fixed on the elastic bracket.

[0020] As an optimized solution, the elastic support includes support frames arranged in a staggered manner from top to bottom, with spring plates obliquely fixed between the ends of two support frames facing the same direction.

[0021] As an optimized solution, the pneumatic hammer is fixed to the inner wall of one of the spring plates.

[0022] As an optimized solution, the discharge chute is fixed to the support frame located above by a support.

[0023] As an optimized solution, the support frame located below is fixed to the bracket.

[0024] As an optimized solution, two support arms are fixedly connected side by side to the upper end of the support, a support plate is fixedly connected to the outer wall of the hopper, and several vertically arranged rubber shock-absorbing pad assemblies are fixed between the support arms and the support plate.

[0025] As an optimized solution, the support platform is horizontally slidably equipped with a linear guide rail located below the collector outlet, and a large-dose balance and a small-dose balance are fixed side by side at the sliding end of the linear guide rail.

[0026] As an optimized solution, measuring cups are placed on the large-dose balance and the small-dose balance respectively, located below the discharge port of the collector.

[0027] Compared with the prior art, the beneficial effects of the present invention are: This invention achieves a multi-dimensional breakthrough by integrating several weighing units into a weighing platform: High-efficiency integration: Multiple weighing units are integrated into a circular platform, allowing for the simultaneous weighing of powders and various additives, resulting in a significant increase in efficiency; the integration of several weighing units into the support platform saves space; and centralized collection of materials weighed by each unit avoids cross-contamination during the transfer of multiple materials. Ultrasonic screening: The ultrasonic screening machine directly acts on the agglomerated powder at the bottom of the silo to completely break it up, prevent the formation of cavities at the bottom of the silo, and ensure the uniformity of material feeding. Anti-cross-contamination: The multi-unit, visually enclosed design allows for centralized material collection by the collector, avoiding cross-contamination caused by the transfer and exposure of multiple materials and ensuring the stability of piezoelectric ceramic performance; Vibration weighing: The V-shaped discharge chute facilitates powder transfer. The power source is a pneumatic hammer, which controls the air volume through a program to generate adjustable frequency and amplitude vibration. In conjunction with a spring plate, it enables accurate powder weighing. Dosage adaptation: The combination of small-dosage balance and large-dosage balance can simultaneously meet the differentiated dosage weighing requirements of small additives and large powders; the linear guide rail drives the small-dosage balance and large-dosage balance to move precisely, and together with the weighing unit and discharge control, ensures the weighing accuracy under multiple units; Structural stability: The graded support of the bracket and support frame ensures the structural reliability of the integrated platform during multi-unit operation. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0029] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the weighing unit of the present invention; Figure 3 This is a schematic diagram of the material feeding bayonet structure of the present invention.

[0030] In the diagram: 1-Support platform; 2-Weighing unit; 3-Collector; 4-Large dose balance; 5-Small dose balance; 6-Measuring cup; 7-Linear guide rail; 8-Discharge chute; 9-Transparent acrylic cover; 10-Hopper; 11-Hopper cover; 12-Inert gas pipe; 13-Discharge port; 14-Discharge bayonet; 15-Fastening bolt; 16-Support frame; 17-Spring plate; 18-Pneumatic hammer; 19-Discharge port; 20-Ultrasonic sieve; 21-Bracket; 22-Support arm; 23-Rubber shock-absorbing pad assembly; 24-Support plate. Detailed Implementation

[0031] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0032] like Figures 1 to 3 As shown, an automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment includes a support platform 1, a collector 3 located in the middle of the support platform 1, and several weighing units 2 arranged around the collector 3 on the support platform 1. Each weighing unit 2 includes a discharge trough 8 arranged in a V-shape for vibration. The outlet of the discharge trough 8 extends to the top of the collector 3, and a hopper 10 is connected to the top of the discharge trough 8.

[0033] The V-shaped vibration setting of the discharge chute 8 guides the powder out, solving the problem of compression and blockage in traditional screw conveyors.

[0034] The top of the silo 10 is detachably connected to the silo cover 11 by bolts. The silo cover 11 is connected to an inert gas pipe 12, such as nitrogen, to prevent the piezoelectric ceramic powder from absorbing moisture and deteriorating. The lower end of the hopper 10 is provided with a discharge port 13. An ultrasonic screening machine 20 is fixedly connected to the outer wall of the discharge port 13. The drive end of the ultrasonic screening machine 20 extends into the discharge port 13 and is fixedly connected with a screen plate.

[0035] The discharge port 13 is also fitted with a discharge slot 14 that slides vertically, and the lower end of the discharge slot 14 extends into the discharge groove 8.

[0036] The feeding gate 14 has an outlet 19 on each of its opposite side walls. The inclination direction of the outlet 19 matches the inclination of the inner wall of the discharge trough 8, which can accurately control the amount of powder discharged. The higher the feeding gate 14 is raised, the more powder is discharged. When the feeding gate 14 is closed, it can also prevent the powder from contacting the air. A fastening bolt 15 is threaded onto the outer wall of the discharge port 13. A sliding hole is vertically opened at the top of the discharge bayonet 14. The fastening bolt 15 is constrained in the sliding hole, and the shank end of the fastening bolt 15 abuts against the outer wall of the discharge bayonet 14.

[0037] A transparent acrylic cover plate 9 is fixed to the top of the discharge trough 8, which allows for real-time observation of the powder state in the V-shaped trough and prevents the powder from being contaminated by the outside world. The transparent acrylic cover plate 9 has an opening with an outer diameter larger than that of the material feeding bayonet 14, and the lower end of the material feeding bayonet 14 passes through the opening.

[0038] The discharge chute 8 is supported on the elastic bracket 21, and a pneumatic hammer 18 is fixed on the elastic bracket 21. The conveying method uses the pneumatic hammer 18, and the air volume is controlled by the program to generate frequency-adjustable amplitude vibration. The elastic support 21 includes support frames 16 arranged in an alternating manner from top to bottom, with spring plates 17 fixedly connected at an incline between the two support frames 16 facing the same end.

[0039] The pneumatic hammer 18 is fixed to the inner wall of one of the spring plates 17.

[0040] The spring plate 17 at the bottom of the discharge trough 8 and the support frame 16 provide support and assist vibration, working together with the pneumatic hammer 18 to achieve precise vibration weighing; The discharge chute 8 is fixed to the support frame 16 located above by a support.

[0041] The support frame 16 located below is fixed to the bracket 21, and the bracket 21 is fixed to the support platform 1.

[0042] Two support arms 22 are fixedly connected side by side to the upper end of the support 21. A support plate 24 is fixedly connected to the outer wall of the hopper 10. Several vertically arranged rubber shock-absorbing pad assemblies 23 are fixed between the support arms 22 and the support plate 24. When the ultrasonic screening machine 20 is working, it greatly reduces the vibration between the hopper 10 and the support 21, ensuring the stability of the platform. The support platform 1 is located below the discharge port 19 of the collector 3 and is equipped with a horizontally sliding linear guide rail 7. The sliding end of the linear guide rail 7 is fixed with a large-dose balance 4 and a small-dose balance 5 in parallel.

[0043] A measuring cup 6 is placed on the large-dose balance 4 and the small-dose balance 5, respectively, located below the outlet of the collector 3.

[0044] The working principle of this device is as follows: The piezoelectric ceramic powder and each sintering aid are added into the corresponding weighing unit 2 silo 10, and inert gas is introduced to achieve a storage environment that prevents moisture absorption and pollution. For weighing large quantities of materials, through program control, the linear guide rail 7 transports the large-volume balance 4 to the outlet of the collector 3 to wait, and the measuring cup 6 is placed in it, and the weighing unit 2 starts to work. For weighing small doses of materials, through program control, the linear guide rail 7 transports the small dose balance 5 to the collector 3 to wait, and then the measuring cup 6 is placed in it, and the weighing unit 2 starts working. The specific operation of weighing unit 2 is as follows: 1. Add piezoelectric ceramic powder to the silo 10, cover the silo with the cover 11, and introduce inert gas through the inert gas pipe 12 to create a moisture-proof environment; 2. Start the ultrasonic sieve 20 to break up the agglomerated powder. The rubber shock-absorbing pad assembly 23 will simultaneously dampen the vibration and keep the hopper 10 stable. 3. Adjust the height of the feeding port 14 according to the weighing requirements to control the amount of powder discharged; 4. The powder enters the V-shaped discharge trough 8 formed by the transparent acrylic cover plate 9, and the amount of powder can be visually observed through the transparent acrylic cover plate 9; 5. The program controls the air volume of the pneumatic hammer 18, so that the pneumatic hammer 18 and the spring plate 17 vibrate together to achieve accurate weighing of powder. 6. After weighing, the powder is discharged from the outlet of the discharge trough 8, completing one automated weighing cycle.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. An automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment, characterized in that: The system includes a support platform (1), a collector (3) is provided in the middle of the support platform (1), and a number of weighing units (2) are arranged around the collector (3) on the support platform (1). Each weighing unit (2) includes a discharge trough (8) arranged in a V-shape. The outlet of the discharge trough (8) extends to the top of the collector (3), and a hopper (10) is connected above the discharge trough (8).

2. The automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment according to claim 1, characterized in that: The top of the hopper (10) is detachably connected to a hopper cover (11), and an inert gas pipe (12) is connected to the hopper cover (11).

3. The automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment according to claim 1, characterized in that: The lower end of the hopper (10) is provided with a discharge port (13), and an ultrasonic sieve (20) is fixedly connected to the outer wall of the discharge port (13). The drive end of the ultrasonic sieve (20) extends into the discharge port (13) and is fixedly connected with a screen plate.

4. The automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment according to claim 3, characterized in that: The discharge port (13) is also fitted with a vertically sliding discharge slot (14), the lower end of which extends into the discharge groove (8).

5. The automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment according to claim 4, characterized in that: The material feeding slot (14) has an outlet (19) on its opposite side wall, and the inclination direction of the outlet (19) matches the inclination of the inner wall of the discharge trough (8).

6. The automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment according to claim 4, characterized in that: A fastening bolt (15) is threaded onto the outer wall of the discharge port (13). A sliding hole is vertically opened at the top of the discharge bayonet (14). The fastening bolt (15) is constrained in the sliding hole. The shank end of the fastening bolt (15) abuts against the outer wall of the discharge bayonet (14).

7. The automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment according to claim 1, characterized in that: A transparent acrylic cover plate (9) is fixed to the top of the discharge trough (8).

8. The automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment according to claim 1, characterized in that: The discharge trough (8) is supported on the elastic bracket (21), and a pneumatic hammer (18) is fixed on the elastic bracket (21).

9. The automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment according to claim 8, characterized in that: The elastic support (21) includes support frames (16) arranged in an alternating manner from top to bottom, with spring plates (17) obliquely fixed between the two support frames (16) facing the same end; the pneumatic hammer (18) is fixed to the inner wall of one of the spring plates (17).

10. The automatic weighing system for piezoelectric ceramic synthesis suitable for high-throughput equipment according to claim 1, characterized in that: The support platform (1) is located below the outlet of the collector (3) and is equipped with a linear guide rail (7) that slides horizontally. The sliding end of the linear guide rail (7) is fixed with a large-dose balance (4) and a small-dose balance (5) in parallel.

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