A fixing device for a pressure sensor ceramic substrate

Abstract

The present application relates to ceramic substrate technical field, especially to a kind of fixing device of pressure sensor ceramic substrate, including operation platform and membrane scraping equipment, the sliding table is slidably arranged on the table top of operation platform, operation platform is sequentially provided with leveling mechanism, restraint mechanism and discharge mechanism for ceramic substrate on its table top, sliding table receives ceramic substrate from leveling mechanism and levels, sliding table enters restraint mechanism and is fixed, again using the membrane scraping equipment of upper membrane scraping, sliding table enters discharge mechanism and sends out the ceramic substrate of membrane scraping finished, the present application solves the problem that the position of ceramic substrate cannot be fixed when membrane scraping, while the surface of substrate is inclined, will affect the quality of membrane scraping also can affect the efficiency of membrane scraping, the proposal of the present fixing device, the membrane scraping treatment of ceramic substrate experiences leveling, membrane scraping and discharge process, ceramic substrate is evenly scraped, both can improve the quality of membrane scraping, also can improve work efficiency.

Description

Technical Field

[0001] This invention relates to the field of ceramic substrate technology, and in particular to a device for fixing a ceramic substrate for a pressure sensor. Background Technology

[0002] A ceramic pressure sensor mainly consists of three parts: a ceramic ring, a ceramic diaphragm, and a ceramic cover plate. A traditional ceramic diaphragm structure is shown in the attached diagram. Figure 1 As shown, ceramic diaphragms, as force-sensitive elastomers, require flatness, uniformity, and density. Their thickness and effective radius depend on the design range.

[0003] Patent (CN105710002A) discloses a ceramic diaphragm scraping device, including a worktable, a conveyor belt, and a scraping substrate. The scraping substrate is fixed on the conveyor belt, and both ends of the conveyor belt are fixed to the worktable via rotating rollers. A scraping device is mounted above the conveyor belt, comprising a material bin, a scraper support, and scrapers. The scraper support is fixed to one side of the material bin, and the bottom edge of the other side of the material bin contacts the scraping substrate. Multiple scrapers are fixedly arranged below the scraper support, with the lower ends of the scraper blades flush. A spiral adjuster is provided between the scraper support and the scrapers. In this technical solution, scrapers are used to smooth the upper surface of the ceramic diaphragm. The ceramic diaphragm is placed on the conveyor belt, and as the conveyor belt moves, the ceramic diaphragm passes through the scrapers one by one to achieve the scraping operation. However, since the position of the ceramic diaphragm cannot be guaranteed to be fixed during the scraping process, the scraping effect of the ceramic diaphragm is not ideal.

[0004] In the existing MLCC casting process, ceramic slurry is coated onto the ceramic substrate through the casting port of the casting machine to form a uniform thin layer of slurry. Most of the solvent in the slurry is then evaporated through the hot air zone. After drying, a ceramic film is obtained, and a doctor blade is used to control the thickness of the film during the scraping process.

[0005] In the actual coating process, the slurry needs to be evenly applied to the ceramic substrate. The ceramic substrate must meet two requirements: First, its position must be fixed. If the substrate cannot remain stationary, movement will occur the moment the squeegee contacts it, resulting in uneven coating and affecting quality. Second, the substrate surface must be level. Because the squeegee tip is brittle, tilting the substrate surface can easily cause breakage, leading to production accidents. Both of these factors affect the efficiency of ceramic substrate coating. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device for fixing a ceramic substrate for a pressure sensor.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A device for fixing a ceramic substrate for a pressure sensor includes an operating table and a film scraping device. The film scraping device is mounted above the operating table, and the scraper of the film scraping device is perpendicular to the table surface. A slide is slidably mounted on the operating table. From right to left, a leveling mechanism, a constraint mechanism, and a discharge mechanism for the ceramic substrate are arranged on the operating table. The film scraping device is mounted above the constraint mechanism. The slide passes through the leveling mechanism and the constraint mechanism in sequence. The slide enters the leveling mechanism to receive the ceramic substrate and uses the leveling mechanism to level the upper surface of the ceramic substrate. The slide enters the constraint mechanism and uses the constraint mechanism to fix the ceramic substrate. Then, the film scraping device above scrapes the substrate. The slide enters the discharge mechanism to send out the scraped ceramic substrate. A cutout for holding the ceramic substrate is opened on the front side of the table surface of the slide, and two movable supports for clamping the ceramic substrate are also provided in the cutout.

[0009] In a preferred embodiment, the leveling mechanism is a feeding box, which has a vertically penetrating feeding slot for placing ceramic substrates opened from the center of its top surface, and a straight notch for sliding of the slide table opened at the bottom of the feeding box. The inner wall of the straight notch fits against the outer wall of the slide table to form a sliding fit.

[0010] In a preferred embodiment, the film scraping device is fixedly mounted on the side of the feeding box by a mounting bracket.

[0011] In a preferred embodiment, the constraint mechanism is a clamping plate symmetrically arranged at the two edges of the operating table. The clamping plate is a single structural plate made of longitudinal and transverse plates spliced ​​together, and the longitudinal and transverse plates are staggered in height. A frame plate is provided at the bottom of the transverse plate, and the clamping plate is fixedly installed on the table surface of the operating table through the frame plate at its bottom.

[0012] In a preferred embodiment, the operating table has a slide rail for linear sliding of the slide table along its length, and a piston push column is provided at the right end face of the slide table, the piston push column being externally connected to the output end of a hydraulic cylinder or a push rod motor.

[0013] In a preferred embodiment, the discharge mechanism is a discharge hole located on the left side of the slide, and the discharge hole is located along the central axis of the slide.

[0014] In a preferred embodiment, the slide has a stepped groove on the left side of its surface, and a cutout is located in the first step of the stepped groove. The two movable supports in the cutout have V-shaped grooves or U-shaped grooves on their opposite sides, and the area between the two movable supports is designed as a placement space for placing ceramic substrates.

[0015] In a preferred embodiment, a clearance block is provided on the second step of the stepped groove, and the upper surface of the clearance block is flush with the second step of the stepped groove.

[0016] In a preferred embodiment, the opposite ends of the movable bracket and the cross plates of the two clamping plates are rotatably mounted on the cutouts of the slide table and the table surface of the operating table via their respective spring shafts.

[0017] In a preferred embodiment, the thickness of the slide table is less than the thickness of the ceramic substrate, the first step surface of the slide table is flush with the corresponding two longitudinal plates, the upper plate surface of the movable bracket is flush with the corresponding two transverse plates and the second step surface of the slide table, and the upper plate surface of the movable bracket is higher than the first step surface of the slide table.

[0018] The beneficial effects of this invention are:

[0019] 1. Each ceramic substrate is placed onto the slide table one by one using the feeding box, and the film coating operation is performed one by one. This is simple, orderly, and enhances sustainability.

[0020] 2. The table surface of the slide table fits against the top wall of the bottom notch of the feeding box. When the bottom of the feeding slot falls into the placement space of the slide table and slides to the left, the solid bottom surface of the feeding box can be used to level the ceramic substrate, ensuring that it is in a horizontal state and that the slurry is smoothed. In addition, the solid table surface on the right side of the slide table can block the feeding slot, preventing the next ceramic substrate from falling down.

[0021] 3. When the slide table slides to the left and the front end of the slide table touches the longitudinal plate, it will push the longitudinal plate outward. At the same time, the horizontal plates on both sides will rotate towards the middle and press against the two movable supports, pressing the movable supports together, thereby constraining the ceramic substrate placed between the two movable supports. The groove wall of the V-shaped groove or U-shaped groove can effectively restrict the movement of the ceramic substrate and ensure that it is in a fixed state.

[0022] 4. The clearance block gradually narrows from left to right, then gradually widens again after reaching the middle position, finally forming an arc-shaped edge at the far right. As the slide table continues to move to the left with the movable support, the force exerted by the horizontal plate on the movable support gradually decreases. When the horizontal plate reaches the narrowest position of the clearance block, the clamping force of the movable support on the ceramic substrate is at its minimum, meaning the ceramic substrate is in a relatively loose state. This position is precisely aligned with the discharge hole, allowing the ceramic substrate to fall out of the discharge hole automatically, making the function easy to implement.

[0023] In summary, the fixing device proposed in this solution solves the problems of the inability to fix the position of the ceramic substrate during film coating, and the impact of substrate surface tilt on coating quality and efficiency. With this fixing device, the ceramic substrate coating process, including leveling, coating, and unloading, is fully automated, reducing the difficulty of manual operation. Moreover, the coating of the ceramic substrate is uniform and the working continuity is high, which can improve both coating quality and work efficiency. Attached Figure Description

[0024] Figure 1 A schematic diagram of the ceramic substrate structure on a conventional pressure sensor.

[0025] Figure 2 This is a schematic diagram of the main structure of the ceramic substrate fixing device proposed in this invention;

[0026] Figure 3 This is a top view of the ceramic substrate fixing device proposed in this invention.

[0027] Figure 4 This is a schematic diagram of the left side of the ceramic substrate fixing device proposed in this invention;

[0028] Figure 5 for Figure 4 Sectional view at point AA;

[0029] Figure 6 This is a three-dimensional structural diagram of the ceramic substrate fixing device proposed in this invention;

[0030] Figure 7 This is a schematic diagram of the assembly structure of the clamping plate and movable support proposed in this invention.

[0031] In the diagram: 1. Operating table; 2. Slide table; 3. Feeding box; 4. Film scraping device; 5. Piston push column; 6. Slide rail; 7. Discharge hole; 8. Clamping plate; 81. Longitudinal plate; 82. Horizontal plate; 9. Feeding trough hole; 10. Movable support; 11. Placement chamber; 12. Clearing block; 13. Step groove; 14. Shelf plate; 15. Spring shaft. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] In this embodiment, refer to Figure 2-7A device for fixing a ceramic substrate for a pressure sensor includes an operating table 1 and a scraping device 4. The scraping device 4 is mounted above the operating table 1, and the scraper of the scraping device 4 is perpendicular to the table surface of the operating table 1. A slide table 2 is slidably mounted on the operating table 1. From right to left, a leveling mechanism, a constraint mechanism, and a discharge mechanism for the ceramic substrate are arranged on the operating table 1. The scraping device 4 is mounted above the constraint mechanism. The slide table 2 passes through the leveling mechanism and the constraint mechanism in sequence. The slide table 2 enters the leveling mechanism to receive the ceramic substrate and uses the leveling mechanism to level the upper surface of the ceramic substrate. The slide table 2 enters the constraint mechanism and uses the constraint mechanism to fix the ceramic substrate. Then, the scraping device 4 above is used to scrape the ceramic substrate. The slide table 2 enters the discharge mechanism to send out the scraped ceramic substrate. A cutout for holding the ceramic substrate is opened on the front side of the table surface of the slide table 2, and two movable supports 10 for clamping the ceramic substrate are also provided in the cutout.

[0034] Specifically:

[0035] Regarding slide 2: The operating platform 1 has a slide rail 6 along its length for linear sliding of slide 2. A piston push column 5 is located on the right end face of slide 2, and the piston push column 5 is externally connected to the output end of a hydraulic cylinder or push rod motor. The piston push column 5 propels slide 2 to slide linearly along the operating platform 1, and sequentially enters the leveling mechanism and the constraint mechanism.

[0036] Regarding the leveling mechanism: The leveling mechanism is a feeding box 3. The feeding box 3 has a vertically penetrating feeding slot 9 for placing ceramic substrates, which is opened from the center of its top surface downwards. The bottom of the feeding box 3 has a straight notch for sliding the slide table 2. The inner wall of the straight notch fits against the outer wall of the slide table 2 to form a sliding fit. The slide table 2 has a stepped groove 13 on the left side of its table surface. The cutout is located in the first step of the stepped groove 13. The two movable supports 10 set in the cutout have V-shaped grooves or U-shaped grooves on their facing sides, respectively. The area left between the two movable supports 10 is designed as a placement space 11 for placing ceramic substrates.

[0037] The discharge slot 9 is designed to be connected with the attached... Figure 1 The ceramic substrates shown have a consistent outer contour. Workers can place each ceramic substrate to be coated one by one into the feeding slot 9 from the upper port, allowing it to fall freely onto the slide table 2 below under its own weight. In practical application, the surface of the slide table 2 is flush with the top wall of the bottom notch of the feeding box 3. Therefore, when the bottom substrate of the feeding slot 9 falls into the placement chamber 11 of the slide table 2 and slides to the left, the solid bottom surface of the feeding box 3 can be used to level the ceramic substrate, ensuring it is horizontal. Furthermore, the solid surface on the right side of the slide table 2 can block the feeding slot 9, preventing the next ceramic substrate from falling further downwards.

[0038] Regarding the constraint mechanism: The constraint mechanism is a clamp plate 8 symmetrically arranged at the two edges of the operating table 1. The clamp plate 8 is a single structural plate made of longitudinal plate 81 and transverse plate 82 spliced ​​together. The longitudinal plate 81 and transverse plate 82 are staggered in height. A frame plate 14 is provided at the bottom of the transverse plate 82. The clamp plate 8 is fixedly installed on the table surface of the operating table 1 through the frame plate 14 at its bottom.

[0039] When the slide table 2 slides to the left and the front end of the slide table 2 touches the longitudinal plate 81, it will push the longitudinal plate 81 outward. At the same time, the horizontal plates 82 on both sides will rotate towards the middle and press against the two movable supports 10, pressing the movable supports 10 together, thereby constraining the ceramic substrate placed between the two movable supports 10. The groove wall of the V-shaped groove or U-shaped groove can effectively restrict the movement of the ceramic substrate and ensure that it is in a fixed state.

[0040] Combined with appendix Figure 2 Or attach Figure 3 As can be seen, the film scraping device 4 is positioned directly above the constraint mechanism, and is fixedly mounted on the side of the feeding box 3 via a mounting bracket. Once the ceramic substrate is constrained, the film scraping device 4 can be used to scrape the upper surface of the ceramic substrate. At this point, the ceramic substrate is in a fixed position and its upper surface is horizontal, ensuring the quality of the film scraping.

[0041] Regarding the material discharge mechanism: see attached. Figure 3 Or attach Figure 6 As shown, the discharge mechanism is a discharge hole 7 opened on the left side of the slide 6, and the discharge hole 7 is opened along the central axis of the slide 6. When the ceramic substrate is scraped, the slide 2 is pushed to continue sliding to the left. When the cutout of the slide 2 is aligned with the discharge hole 7, the ceramic substrate that has been scraped can be released.

[0042] Furthermore, to ensure that the slide table 2 can smoothly slide from the constraint mechanism to the discharge mechanism, a certain gap should be maintained between the two longitudinal plates 81. That is to say, the length of the longitudinal plates 81 can be adjusted. The longitudinal plates 81 only need to be able to form a pressing contact with the slide table 2, and do not need to be too long. During the process of the slide table 2 sliding from the constraint mechanism to the discharge mechanism, the clamping plate 8 will always be in a passive rotation state due to the push of the slide table 2. That is to say, the horizontal plate 82 is always in an inward rotation position. Therefore, in order to ensure that the ceramic substrate in the placement chamber 11 of the slide table 2 can fall out smoothly from the discharge hole 7 when entering the discharge mechanism, a clearance block 12 is designed.

[0043] Combined with appendix Figure 3 Appendix Figure 6 and appendix Figure 7The slide table 2 is recessed inward on both its front and rear sides near its left end. As the slide table 2 moves from left to right, the longitudinal plate 81 can gradually press against and slide into the recesses on both sides of the slide table 2. The clearance block 12 is designed on the second step of the stepped groove 13. The clearance block 12 gradually narrows from left to right, and then gradually widens after reaching the middle position, finally forming an arc edge at the rightmost end. During the process of the horizontal plate 82 pressing against the movable bracket 10, it can be ensured that the ceramic substrate is clamped and fixed by the movable bracket 10. This state is used for film scraping. After the film coating is completed, as the slide table 2 continues to move to the left with the movable support 10, the longitudinal plate 81 enters the recess, and the force exerted by the transverse plate 82 on the movable support 10 gradually decreases. When the longitudinal plate 81 contacts the deepest part of the recess, the transverse plate 82 just reaches the narrowest position of the clearance block 12. At this point, the clamping force of the movable support 10 on the ceramic substrate is at its minimum, meaning the ceramic substrate is in a relatively loose state. This position aligns perfectly with the discharge hole 7, allowing the ceramic substrate to fall out of the discharge hole 7. The clearance block 12 is designed to prevent the transverse plate 82 from being interfered with by the slide table 2 during its sliding motion.

[0044] Furthermore, the opposing ends of the movable support 10 and the cross plates 82 of the two clamping plates 8 are rotatably mounted on the cutouts of the slide table 2 and the table surface of the operating table 1 via their respective spring shafts 15. The spring shafts 15 are provided to ensure that the rotation of the clamping plates 8 and the movable support 10 is reversible and can be reused.

[0045] It is worth noting that the upper surface of the clearance block 12 is flush with the second step of the stepped groove 13, the thickness of the slide table 2 is less than the thickness of the ceramic substrate, the first step surface of the slide table 2 is flush with the corresponding two vertical plates 81, the upper surface of the movable bracket 10 is flush with the corresponding two horizontal plates 82 and the second step surface of the slide table 2, and the upper surface of the movable bracket 10 is higher than the first step surface of the slide table 2. Furthermore, it is worth mentioning that the overall thickness of the slide table 2 should be slightly less than the thickness of the ceramic substrate. With this design, the upper surface of the ceramic substrate can contact and level with the top wall of the bottom straight notch of the feeding box 3. Simultaneously, the upper surface of the ceramic substrate is slightly higher than the upper surface of the movable bracket 10, so that the film scraping device 4 will only process the ceramic substrate during film scraping and will not process other parts.

[0046] After the first ceramic substrate is coated, the piston push column 5 pulls the slide table 2 back to its initial position, which is the placement chamber 11 directly below the material feeding slot 9. At this point, the ceramic substrate at the bottom of the material feeding slot 9 can fall into the placement chamber 11, thus starting the next cycle of coating. In this way, each ceramic substrate is placed onto the slide table 2 one by one using the material feeding box 3, and the coating operation is performed one by one, which is simple, orderly, and enhances sustainability.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fixing device for a pressure sensor ceramic substrate, comprising an operating table (1) and a scraping device (4), wherein the scraping device (4) is mounted above the operating table (1), and the scraper of the scraping device (4) is perpendicular to the table surface of the operating table (1), characterized in that, The operating table (1) has a sliding table (2) slidably mounted on its surface. The operating table (1) has a leveling mechanism, a constraint mechanism and a discharge mechanism for ceramic substrates arranged sequentially from right to left on its surface. The film scraping device (4) is mounted above the constraint mechanism. The sliding table (2) passes through the leveling mechanism and the constraint mechanism in sequence. The sliding table (2) enters the leveling mechanism to receive the ceramic substrate and uses the leveling mechanism to level the upper surface of the ceramic substrate. The sliding table (2) enters the constraint mechanism and uses the constraint mechanism to fix the ceramic substrate. Then, the film scraping device (4) above is used to scrape the film. The sliding table (2) enters the discharge mechanism to send out the ceramic substrate after the film scraping is completed. The front side of the sliding table (2) has a cutout for holding the ceramic substrate, and the cutout also has two movable supports (10) for clamping the ceramic substrate. The constraint mechanism is a clamp (8) symmetrically arranged at the two sides of the edge of the operating table (1). The clamp (8) is a whole structural plate spliced ​​by a longitudinal plate (81) and a transverse plate (82). The longitudinal plate (81) and the transverse plate (82) are staggered in height. A frame plate (14) is provided at the bottom of the transverse plate (82). The clamp (8) is fixedly installed on the table surface of the operating table (1) by the frame plate (14) provided at its bottom. The slide (2) has a stepped groove (13) on the left side of its table surface, and the cutout is located in the first step of the stepped groove (13). The two movable supports (10) set in the cutout have V-shaped grooves or U-shaped grooves on their opposite sides. The area left between the two movable supports (10) is designed as a placement space (11) for placing ceramic substrates.

2. The fixing device for a pressure sensor ceramic substrate according to claim 1, characterized in that, The leveling mechanism is a feeding box (3). The feeding box (3) has a vertically penetrating feeding slot (9) for placing ceramic substrates, which is opened from the center of its top surface downwards. The bottom of the feeding box (3) has a straight notch for sliding the slide table (2). The inner wall of the straight notch fits the outer wall of the slide table (2) and forms a sliding fit.

3. The fixing device for a pressure sensor ceramic substrate according to claim 2, characterized in that, The film scraping device (4) is fixedly installed on the side of the feeding box (3) by a mounting bracket.

4. The fixing device for a pressure sensor ceramic substrate according to claim 1, characterized in that, The operating table (1) has a slide rail (6) for linear sliding of the slide table (2) in the length direction of its surface. A piston push column (5) is provided on the right end face of the slide table (2). The piston push column (5) is externally connected to the output end of a hydraulic cylinder or a push rod motor.

5. The fixing device for a pressure sensor ceramic substrate according to claim 4, characterized in that, The discharge mechanism is a discharge hole (7) opened on the left side of the slide (6), and the discharge hole (7) is opened along the central axis of the slide (6).

6. The fixing device for a pressure sensor ceramic substrate according to claim 1, characterized in that, An obstacle block (12) is provided on the second step of the stepped groove (13).

7. The fixing device for a pressure sensor ceramic substrate according to claim 1, characterized in that, The ends of the movable bracket (10) that are connected to each other and the cross plates (82) of the two clamps (8) are respectively rotatably mounted on the cutout of the slide (2) and the table surface of the operating table (1) through their respective spring shafts (15).

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