A pressure detection sensor for a forming device for producing carbon-based materials
Patent Information
- Application Number
- CN202522171244.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-14
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-10-14
AI Technical Summary
Existing carbon-based material molding equipment cannot accurately detect the local pressure distribution of complex molds, resulting in uneven density, excessive porosity, and insufficient structural strength in the molded products.
A pressure detection sensor was designed, comprising a base plate, an extension column, a support plate, a mounting cylinder, a pressure sensor, and a limit rod. It collects local pressure data through multiple first pressure sensors and collects overall pressure data through a second pressure sensor, forming a dual detection system. The system is then combined with a processor for data analysis and adjustment.
It enables precise pressure detection of complex molds, avoids local pressure dead zones, improves product quality and production efficiency, and reduces raw material waste and production costs.
Smart Images
Figure CN224928608U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pressure detection technology, and more specifically, to a pressure detection sensor for molding equipment used in the production of carbon-based materials. Background Technology
[0002] Carbon-based materials are a new type of functional / structural materials with carbon as the core element and carbon dominating the material's structure and properties. Essentially, they achieve special properties such as electrical conductivity, thermal conductivity, high strength, and lightweight by constructing microstructures through carbon allotropes (such as graphite, diamond, and carbon nanotubes) or carbon compounds (such as carbon fibers, graphene, and carbon black).
[0003] In the production of carbon-based materials, the molding process is a crucial step that determines product performance and quality. Some carbon-based materials (such as large carbon fiber components and irregularly shaped porous carbon) require special molding dies for pressing production. However, due to product structure limitations, these dies generally have complex cavities, numerous edges and corners, and irregular curved surfaces. This leads to the emergence of "local pressure dead zones" inside the mold during the molding process. That is, when the pressure in the central area of the mold meets the standard, the pressure in the edges or corners or irregularly shaped areas is insufficient, or the pressure in some areas is too high. Moreover, existing molding equipment lacks targeted pressure detection devices, and can only roughly monitor the overall pressure applied to the mold, failing to accurately capture the pressure distribution differences in different areas.
[0004] The limitations of this pressure detection method directly lead to two major problems: First, it cannot detect "local pressure dead zones" in a timely manner, resulting in quality defects in the molded carbon-based materials, such as uneven density, excessive internal porosity, and insufficient structural strength, leading to a low product qualification rate. Second, it is difficult to adjust molding parameters based on pressure distribution data, requiring repeated trial molding based on manual experience, which not only prolongs the production cycle but also increases raw material waste and production costs. Therefore, this paper proposes a pressure detection sensor for molding equipment used in the production of carbon-based materials. Utility Model Content
[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a pressure detection sensor for molding equipment for carbon-based material production, which aims to solve the problems mentioned in the background art.
[0006] This utility model provides the following technical solution: a pressure detection sensor for molding equipment used in the production of carbon-based materials, including a base plate, on which a detection component is provided; The detection assembly includes an extension column disposed on the top of the base plate, a support plate disposed on the top of the extension column, a plurality of mounting cylinders disposed on the top of the support plate, and a first pressure sensor embedded in each of the mounting cylinders, and a spring abutting against the bottom of the support plate sleeved on the outside of the extension column. The upper surface of the extension column is provided with a guide groove, and a sliding sleeve is slidably connected in the guide groove. The sliding sleeve is fixed to the bottom of the support plate so that the support plate can be displaced along the axial direction of the extension column.
[0007] Optionally, in one possible implementation, a second pressure sensor is provided in the middle of the extension column, a processor is provided at the bottom of the second pressure sensor, the processor is mounted on the base plate by bolts, and several cable management racks are distributed on the outside of the processor. Optionally, in one possible implementation, a plurality of limiting rods are distributed at the bottom of the base plate, and each limiting rod is engaged with the base plate. The vertical cross-sectional shape of the limiting rod is set to L-shaped, and the limiting rod includes a horizontal section and a vertical section, with the vertical section extending to the outside of the support plate. A clamping block is provided at the top of the limiting rod, and the clamping block is fixed on the limiting rod.
[0008] The technical effects and advantages of this utility model are as follows: By setting multiple first pressure sensors on the top of the pallet, local pressure data of different areas of the mold can be collected simultaneously. Combined with the overall pressure data collected by the second pressure sensor in the middle of the extension column, a dual pressure detection system of local and overall pressure is formed, which completely solves the problem that existing equipment cannot detect the local pressure of complex molds and accurately identifies pressure dead zones.
[0009] The guide groove on the extension column engages with the sliding sleeve at the bottom of the tray, limiting the tray to axial displacement only, thus avoiding detection errors caused by pressure transmission offset; the combination design of the limit rod and clamping block not only prevents the tray from tilting radially, but also enhances the assembly stability of the sensor and the molding equipment, reduces the interference of equipment vibration on the detection data, and ensures the accuracy of pressure detection. Attached Figure Description
[0010] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.
[0011] Figure 1 This is a front view of the overall structure of this utility model.
[0012] Figure 2 This is a top view of the overall structure of this utility model.
[0013] Figure 3 This is a schematic diagram of the tray, mounting cylinder, sliding sleeve, first pressure sensor, and spring of this utility model.
[0014] Figure 4 This is a schematic diagram of the base plate, extension column, second pressure sensor, limit rod, and clamping block of this utility model.
[0015] The attached diagram is labeled as follows: 1. Base plate; 2. Extension column; 3. Support plate; 4. Mounting cylinder; 5. First pressure sensor; 6. Spring; 7. Guide groove; 8. Sliding sleeve; 9. Second pressure sensor; 10. Processor; 11. Clamping block; 12. Cable management rack; 13. Limiting rod. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] This embodiment discloses a pressure detection sensor for molding equipment used in the production of carbon-based materials, which aims to solve the technical problem in existing carbon-based material molding equipment where local pressure dead zones are easily generated due to the complex mold structure, making it impossible to accurately detect the pressure distribution in different areas.
[0018] Specifically, the pressure sensor includes a base plate 1, which serves as the mounting base for the entire sensor and provides stable support for subsequent components. The core detection component is integrated on the base plate 1, and its specific structure is as follows: An extension column 2 is welded and fixed to the top of the base plate 1. The extension column 2 has a cylindrical structure, and its axis is perpendicular to the upper surface of the base plate 1 to ensure the verticality of subsequent component installation. A support plate 3 is provided on the top of the extension column 2. The support plate 3 is a circular metal plate with a diameter adapted to the lower mold base of the carbon-based material molding die. It is used to bear the molding pressure applied by the die and transmit it to the detection component. Several mounting cylinders 4 are evenly distributed along the circumference on the top of the support plate 3. Each mounting cylinder 4 is fixedly connected to the support plate 3 by threads, and the top of the mounting cylinder 4 is flush with the upper surface of the support plate 3. An annular groove is opened on the inner wall of each mounting cylinder 4. The first pressure sensor 5, a miniature pressure sensor of model PT124G-210, is embedded in the mounting cylinder 4 through the groove. The sensing surface of the first pressure sensor 5 is exposed at the top of the mounting cylinder 4 and can directly contact the lower mold base of the molding die. It is used to collect local pressure data at different circumferential positions of the support plate 3, effectively avoiding pressure detection blind spots in pressure dead angle areas such as the corners of the die.
[0019] Meanwhile, a spring 6 is sleeved on the outside of the extension column 2. The top end of the spring 6 abuts against the bottom of the support plate 3 and the bottom end abuts against the top of the base plate 1. When there is no pressure, the spring 6 can support the support plate 3 to keep it in a horizontal state and prevent the support plate 3 from sagging due to its own weight. When the mold applies pressure, the spring 6 can undergo elastic deformation as the support plate 3 moves down, which not only plays a buffering role, but also helps the support plate 3 to reset after the pressure is removed.
[0020] To ensure that the pallet 3 moves along a fixed direction and avoid data distortion caused by deviation during pressure detection, a guide groove 7 is provided on the upper surface of the extension column 2 along the axial direction. Correspondingly, a sliding sleeve 8 is welded and fixed to the bottom of the pallet 3, and the sliding sleeve 8 extends into the guide groove 7, so that the pallet 3 can only move up and down along the axial direction of the extension column 2, ensuring that the pressure transmission direction is consistent with the sensing direction of the first pressure sensor 5, and improving the detection accuracy.
[0021] An installation cavity is provided in the middle of the extension column 2. A second pressure sensor 9 is fixed in the installation cavity by bolts. A high-precision pressure sensor of model HBMC16 is selected. The sensing end of the second pressure sensor 9 faces upward and has a certain initial gap with the bottom of the sliding sleeve 8. When the support plate 3 bears pressure and drives the sliding sleeve 8 to move down along the guide groove 7 to a certain distance, the bottom of the sliding sleeve 8 will contact the sensing end of the second pressure sensor 9. At this time, the second pressure sensor 9 can collect the overall pressure data transmitted by the support plate 3, which complements the local pressure data collected by each first pressure sensor 5, realizing dual pressure detection of local and overall pressure.
[0022] A processor 10 is installed at the bottom of the second pressure sensor 9. The processor 10 is an STM32F407 microcontroller. The processor 10 is mounted on the upper surface of the base plate 1 by bolts. The signal input terminal of the processor 10 is connected to the signal output terminals of each of the first pressure sensors 5 and the second pressure sensor 9 through shielded wires. It is used to receive the pressure electrical signals transmitted by each sensor and convert them into digital signals for analysis and processing. At the same time, each cable management rack 12 is distributed around the outside of the processor 10 along the circumferential direction. The cable management rack 12 is fixed to the base plate 1 by welding. It is used to classify and organize the shielded wires connecting each sensor and the processor 10, so as to avoid signal interference caused by wire tangling and facilitate the troubleshooting of the wires during later maintenance.
[0023] To further improve the assembly stability of the sensor and molding equipment and prevent radial displacement of the pallet 3 during the detection process, several limiting rods 13 are evenly distributed along the circumferential direction at the bottom of the base plate 1. Each limiting rod 13 is snapped to the base plate 1 through a snap-fit structure, which facilitates the disassembly and replacement of the limiting rod 13. The vertical cross-section of the limiting rod 13 is set to an L-shape, including a horizontal section and a vertical section. One end of the horizontal section is snapped to the base plate 1, and the other end extends to the outside of the base plate 1. The vertical section is vertically fixed to the other end of the horizontal section, and the height of the vertical section is higher than the initial height of the pallet 3. This can limit the radial position of the pallet 3 during its up-and-down displacement, and prevent the pallet 3 from tilting due to uneven mold pressure.
[0024] In addition, a clamping block 11 is welded and fixed at the top of each limiting rod 13, i.e. the top of the vertical section. The clamping block 11 is an arc-shaped block made of rubber, and its inner arc surface is adapted to the side wall of the frame of the molding equipment. When the sensor is installed on the molding equipment, the clamping block 11 can be clamped and fixed with the equipment frame, which further improves the installation stability of the entire sensor on the equipment and reduces the impact of vibration on the pressure detection data during equipment operation.
[0025] The specific working principle is as follows: The base plate 1 is fixed to the worktable of the carbon-based material molding equipment with bolts, so that the tray 3 is aligned directly below the lower mold base of the molding mold. At the same time, the clamping block 11 at the top of the limiting rod 13 is clamped to the equipment frame to complete the installation and fixing of the sensor. The connection lines between each sensor and the processor 10 are organized by the cable management rack 12 to ensure that the lines are not tangled and the shielding layer is well grounded.
[0026] When there is no forming pressure, the spring 6 is in a naturally extended state, the support plate 3 remains horizontal, and at this time there is an initial gap of 2mm between the bottom of the sliding sleeve 8 and the sensing end of the second pressure sensor 9. Both the first pressure sensor 5 and the second pressure sensor 9 are in standby state, and the processor 10 waits in real time to receive sensor signals.
[0027] When the molding equipment starts and the upper mold base applies downward pressure, the mold pressure is transmitted to the support plate 3. The support plate 3 overcomes the elastic force of the spring 6 and moves downward along the guide groove 7 of the extension column 2. First, each of the first pressure sensors 5 on the top of the support plate 3 contacts the lower mold base to collect local pressure data at different circumferential positions of the mold and transmits the data to the processor 10. As the pressure continues to increase, the support plate 3 drives the sliding sleeve 8 to continue to move downward. When the bottom of the sliding sleeve 8 contacts the sensing end of the second pressure sensor 9, the second pressure sensor 9 begins to collect the overall pressure data transmitted by the support plate 3 and sends it to the processor 10 simultaneously.
[0028] After receiving the local pressure data from each of the first pressure sensors 5 and the overall pressure data from the second pressure sensor 9, the processor 10 filters and calibrates the data, and calculates the deviation between each local pressure and the overall pressure. If the deviation between a certain local pressure value and the average value of the overall pressure exceeds the preset threshold of the processor 10, it is determined that there is a pressure dead zone in that area. The processor 10 transmits an alarm signal to the control system of the molding equipment through the output terminal. The equipment then adjusts the pressure parameters, such as adjusting the pressure distribution in each area of the upper mold base, until each local pressure is within the acceptable deviation range, thereby achieving precise pressure control of the carbon-based material molding process.
[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A pressure detection sensor for molding equipment used in the production of carbon-based materials, comprising a base plate (1), characterized in that: The base plate (1) is provided with a detection component; The detection component includes an extension column (2) set on the top of the base plate (1), a support plate (3) set on the top of the extension column (2), a plurality of mounting cylinders (4) set on the top of the support plate (3), and a first pressure sensor (5) embedded in each of the mounting cylinders (4). A spring (6) is sleeved on the outside of the extension column (2) and abuts against the bottom of the support plate (3). The upper surface of the extension column (2) is provided with a guide groove (7), and a sliding sleeve (8) is slidably connected in the guide groove (7). The sliding sleeve (8) is fixed to the bottom of the support plate (3) so that the support plate (3) can be displaced axially along the extension column (2).
2. The pressure detection sensor for molding equipment used in the production of carbon-based materials according to claim 1, characterized in that: A second pressure sensor (9) is provided in the middle of the extension column (2), and a processor (10) is provided at the bottom of the second pressure sensor (9).
3. The pressure detection sensor for molding equipment used in the production of carbon-based materials according to claim 2, characterized in that: The processor (10) is mounted on the base plate (1) by bolts, and several cable management racks (12) are distributed on the outside of the processor (10).
4. The pressure detection sensor for molding equipment in carbon-based material production according to claim 1, characterized in that: The bottom of the base plate (1) has a number of limiting rods (13) distributed thereon, and each of the limiting rods (13) is engaged with the base plate (1).
5. The pressure detection sensor for molding equipment in carbon-based material production according to claim 4, characterized in that: The vertical cross-sectional shape of the limiting rod (13) is set to L-shape, and the limiting rod (13) includes a horizontal section and a vertical section, and the vertical section extends to the outside of the support plate (3).
6. The pressure detection sensor for molding equipment in carbon-based material production according to claim 5, characterized in that: The top end of the limiting rod (13) is provided with a clamping block (11), which is fixed on the limiting rod (13).