A tool for coating the end of special-shaped ceramic capacitors

Abstract

The present invention provides a tool for coating ends of special-shaped ceramic capacitors, comprising a slurry platform, a capacitor positioning device and a driving device for driving the capacitor positioning device to move longitudinally; the slurry platform is used to contain the slurry to be coated, and a scraper is arranged on the slurry platform, and the scraper can move along the length and height direction of the slurry platform to flatten and adjust the slurry height; the capacitor positioning device is used to fix special-shaped capacitors of different sizes; the driving device is arranged on one side of the slurry platform, and drives the capacitor positioning device to move longitudinally above the slurry platform; it can solve the problem of the terminal electrode quality of the existing special-shaped capacitors after sealing and reduce the sealing cost, and is widely used in actual production.

Description

Technical Field

[0001] The invention relates to the technical field of capacitors, and in particular to a tool for coating ends of special-shaped ceramic dielectric capacitors. Background Art

[0002] The manual end coating equipment for multilayer ceramic capacitors (MLCC) firstly puts the MLCC chip screen plate. After the MLCC capacitor enters the end plate hole, it is pressed by the end needle bed so that one end of the MLCC is exposed and the other end is inside the end plate. Then, the exposed MLCC end electrode is made flat and uniform by the leveling machine, and then the end plate can be lowered for slurry dipping, thus completing the end sealing of one end electrode. The entire end plate is placed flat in the tunnel drying furnace. After drying, the other end without end sealing is pressed out by the needle bed. The end sealing and drying process of the other end electrode is completed by the same operation, and the entire end sealing process is completed.

[0003] However, the current end coating equipment is designed for capacitors with regular shapes such as MLCC. However, for special-shaped capacitors, such as I-shaped four-terminal ceramic capacitors, there are many problems when using this equipment to seal the ends. For example, the end coating efficiency is low, the end width cannot be controlled, and the end width consistency of the end-coated products is poor, which easily leads to poor end coating and product scrapping; or the chip is difficult to fix on the screen plate, and even after fixing it is difficult to level it, resulting in poor appearance quality of the end electrode of the sealed product and low flanging consistency. Summary of the invention

[0004] The purpose of the present invention is to provide a tool for coating the ends of special-shaped ceramic capacitors, which can solve the quality of the terminal electrodes of existing special-shaped capacitors after sealing and reduce the cost of sealing, and is widely used in actual production.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A tool for coating the end of a special-shaped ceramic capacitor, comprising a slurry platform, a capacitor positioning device, and a driving device for driving the capacitor positioning device to move in the longitudinal direction;

[0007] The slurry platform is used to hold the slurry to be coated. A scraper is provided on the slurry platform. The scraper can move along the length and height direction of the slurry platform to level and adjust the slurry height.

[0008] The capacitor positioning device is used to fix capacitors of different sizes and shapes;

[0009] The driving device is arranged on one side of the slurry platform, and drives the capacitor positioning device to move longitudinally above the slurry platform.

[0010] Furthermore, the slurry platform includes a slurry tank, a guide rail and a scraper.

[0011] The slurry tank is a concave platform for containing the slurry to be coated; the guide rails are arranged on two symmetrical sides of the slurry tank, and a slider is slidably arranged on one of the guide rails;

[0012] The scraper is arranged above the slurry tank, and both ends of the scraper are respectively connected to the slider.

[0013] Furthermore, the scraper is connected to the slider via a screw rod, a screw rod is vertically arranged on the slider, a screw hole is arranged at one end of the scraper, the screw rod passes through the screw hole and is fixed by a nut.

[0014] Furthermore, a limit spring is sleeved on the screw rod, and the limit spring is located between the screw rod and the scraper.

[0015] Furthermore, limiting grooves are arranged on both sides of the slurry tank, and limiting blocks are respectively arranged at both ends of the limiting grooves, and both ends of the guide rails are respectively connected to the limiting blocks.

[0016] Furthermore, the driving device includes a guide column, which is arranged on one side of the slurry trough and perpendicular to the slurry trough; a guide block is slidably arranged on the guide column, and a positioning plate is arranged on the guide block, and the positioning plate is arranged parallel to the slurry trough; the capacitor positioning device is connected to the positioning plate.

[0017] Furthermore, the capacitor positioning device includes a capacitor supporting platform, and a positioning socket for inserting a positioning plate arranged at one end of the capacitor supporting platform; a plurality of capacitor mounting holes for placing capacitors are arranged on the side of the capacitor supporting platform opposite to the positioning socket, and an elastic clamping device is also arranged on one side of the capacitor mounting hole. The elastic clamping device can move along the length direction of the capacitor supporting platform, and one end of the elastic clamping device extends into the capacitor mounting hole for fixing capacitors of different sizes.

[0018] Furthermore, a limit cavity is provided on the bottom surface of the capacitor supporting platform, and the limit cavity is provided between the capacitor mounting hole and the side edge of the capacitor supporting platform;

[0019] The elastic clamping device comprises a fixing rod and a compression spring, one end of the fixing rod passes through the capacitor bearing platform and the limiting cavity and extends into the capacitor mounting hole;

[0020] The compression spring is arranged on the fixing rod, and two ends of the compression spring abut against two sides of the limiting cavity.

[0021] Furthermore, soft pads are provided in the capacitor mounting hole and at the contact end between the fixing rod and the capacitor.

[0022] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0023] The present invention utilizes a slurry platform to flatten the slurry and adjust the height of the slurry to keep it uniform, thereby ensuring that the coating height of the coating surface of the outer electrode end is consistent; utilizes a driving device to drive the position of a capacitor positioning device in the height direction, thereby meeting the coating requirements of capacitors of different sizes, ensuring that the outer electrode ends of capacitors of different sizes can be coated with the slurry; utilizes a capacitor positioning device to fix special-shaped capacitors of different sizes and different regular shapes; therefore, the present invention utilizes a slurry platform, a capacitor positioning device and a driving device to fix the capacitor and flatten the slurry, thereby maintaining the sealing quality of the outer electrode of the special-shaped capacitor and reducing the sealing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of the structure of a tooling for coating the end of a special-shaped ceramic capacitor provided in an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the matching structure between the scraper and the slider provided in an embodiment of the present invention;

[0027] Figure 3 A cross-sectional view of a capacitor positioning device provided by an embodiment of the present invention;

[0028] Figure 4 A bottom view of a capacitor positioning device provided by an embodiment of the present invention.

[0029] Icons: 1-slurry platform, 11-slurry groove, 12-guide rail, 13-slider, 14-scraper, 141-screw hole, 15-limit block, 16-limit groove, 17-limit spring, 18-screw, 2-driving device, 21-guide column, 22-guide block, 23-positioning plate, 3-capacitor positioning device, 31-positioning socket, 32-capacitor bearing platform, 33-elastic clamping device, 331-fixing rod, 332-compression spring, 34-limiting cavity, 35-capacitor mounting hole. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Example 1

[0032] This embodiment provides a tool for coating the end of a special-shaped ceramic capacitor, comprising a slurry platform 1, a capacitor positioning device 3, and a driving device 2 for driving the capacitor positioning device 3 to move in the longitudinal direction;

[0033] The slurry platform 1 is used to hold the slurry to be coated. A scraper 14 is provided on the slurry platform 1. The scraper 14 can move along the length and height direction of the slurry platform 1 to level and adjust the height of the slurry.

[0034] The capacitor positioning device 3 is used to fix capacitors of different sizes and shapes.

[0035] The driving device 2 is disposed on one side of the slurry platform 1 , and drives the capacitor positioning device 3 to move longitudinally above the slurry platform 1 .

[0036] Working principle: When coating the capacitor, first fix the capacitor in the capacitor positioning device 3; secondly, pour a proper amount of slurry into the slurry platform 1, adjust the height of the scraper 14, use the scraper 14 to spread the slurry and adjust the slurry thickness and uniformity; then connect the capacitor positioning device 3 with the driving device 2, use the driving device 2 to drive the capacitor positioning device 3 to move longitudinally above the slurry platform 1, so that the outer electrode end of the capacitor is coated with the slurry, and wait for the coating to be completed; finally, remove the capacitor to dry the electrode, reinstall the capacitor, and coat the other end electrode;

[0037] The present invention utilizes a slurry platform 1 to flatten the slurry and adjust the height of the slurry to keep it uniform, thereby ensuring that the coating height of the outer electrode end coating surface is consistent, which improves the efficiency of end coating compared to pure manual end coating, enables the end width to be controlled, and improves the consistency of the end width, greatly reducing the scrap rate; secondly, the present invention utilizes a driving device 2 to drive the position of a capacitor positioning device 3 in the height direction, thereby meeting the coating requirements of capacitors of different sizes, ensuring that the outer electrode ends of capacitors of different sizes can be coated with slurry; then, the capacitor positioning device 3 is used to fix special-shaped capacitors of different sizes and different regular shapes; therefore, the present invention utilizes a slurry platform 1, a capacitor positioning device 3 and a driving device 2 to fix the capacitor and level the slurry, maintains the quality of the end sealing of the outer electrode of the special-shaped capacitor, and reduces the cost of the end sealing; it should be noted that the end coating tooling of the present invention can be applied to the end coating work of any type of capacitor.

[0038] In this embodiment, the slurry platform 1 includes a slurry tank 11, a guide rail 12 and a scraper 14. The slurry tank 11 is a concave platform for containing the slurry to be coated; the guide rail 12 is arranged on two symmetrical sides of the slurry tank 11, and a slider 13 is slidably arranged on the guide rail 12; the scraper 14 is arranged above the slurry tank 11, and the two ends of the scraper 14 are respectively connected to the slider 13. The slider 13 slides on the guide rail 12, and the scraper 14 is pushed along the guide rail 12, so that the scraper 14 can flatten the slurry on the slurry tank 11, maintain the thickness and uniformity of the slurry, and is more convenient to use.

[0039] In this embodiment, the scraper 14 is connected to the slider 13 through a screw 18. A screw 18 is vertically upwardly arranged on the slider 13. A screw hole 141 is arranged at one end of the scraper 14. The screw 18 passes through the screw hole 141 and is fixed by a nut. The height of the scraper 14 can be adjusted by adjusting the length of the threaded rod screwed into the nut, so that slurry of different thicknesses can be laid out, which is more convenient to use.

[0040] In this embodiment, a limit spring 17 is sleeved on the screw 18, and the limit spring 17 is located between the screw 18 and the scraper 14. After the scraper 14 is installed, the limit spring 17 is in a compressed state. During the movement of the scraper 14, it can ensure that the position of the scraper 14 will not move upward, thereby ensuring that the thickness of the slurry in each part of the slurry tank 11 is always consistent.

[0041] In this embodiment, limiting grooves 16 are provided on both sides of the slurry groove 11, and a limiting block 15 is respectively provided at both ends of the limiting groove 16, and the two ends of the guide rail 12 are respectively connected to the limiting blocks 15; in this way, by sliding the position of the limiting block 15 in the limiting groove 16, the length of the guide rail 12 can be adjusted, thereby adjusting the length of the scraper 14 moving along the guide rail 12 and adjusting the paving area of ​​the slurry.

[0042] In this embodiment, the driving device 2 includes a guide column 21, which is arranged on one side of the slurry tank 11 and perpendicular to the slurry tank 11; a guide block 22 is slidably arranged on the guide column 21, and a positioning plate 23 is arranged on the guide block 22, and the positioning plate 23 is arranged parallel to the slurry tank 11; the capacitor positioning device 3 is connected to the positioning plate 23; when in use, the capacitor positioning device 3 is connected to the guide block 22, and the guide block 22 is slid upward or downward to adjust the position of the capacitor so that the outer electrode of the capacitor is coated with the slurry, which meets the position adjustment of capacitors of different sizes or shapes, and the positioning plate 23 is parallel to the slurry tank 11, which can maintain the flatness of the slurry coated on the outer electrode, and the operation is more flexible and convenient.

[0043] In this embodiment, the capacitor positioning device 3 includes a capacitor carrier platform 32, and a positioning socket 31 for inserting the positioning plate 23 is provided at one end of the capacitor carrier platform 32; a plurality of capacitor mounting holes 35 for placing capacitors are provided on a side of the capacitor carrier platform 32 opposite to the positioning socket 31, and an elastic clamping device 33 is also provided on one side of the capacitor mounting hole 35, and the elastic clamping device 33 can be moved along the length direction of the capacitor carrier platform 32, and one end of the elastic clamping device 33 extends into the capacitor mounting hole 35, and is used to Used to fix capacitors of different sizes; when in use, the capacitor is fixed in the mounting hole. When multiple capacitors need to be coated at the same time, the multiple capacitors can be fixed in different mounting holes and coated at the same time. In order to protect the capacitor from damage, soft materials such as silicone can be arranged in the capacitor mounting hole 35; after capacitors of different sizes are placed in the capacitor mounting hole 35, the elastic clamping device 33 is moved toward the capacitor to stably fix and clamp the capacitor, and then the positioning socket 31 is inserted into the positioning plate 23, so that the connection between the capacitor positioning device 3 and the driving device 2 is realized.

[0044] In this embodiment, a limiting cavity 34 is also provided on the bottom surface of the capacitor supporting platform 32, and the limiting cavity 34 is provided between the capacitor mounting hole 35 and the side of the capacitor supporting platform 32; the elastic clamping device 33 includes a fixing rod 331 and a compression spring 332, and one end of the fixing rod 331 passes through the capacitor supporting platform 32 and the limiting cavity 34 and extends into the capacitor mounting hole 35; the compression spring 332 is provided on the fixing rod 331, and the two ends of the compression spring 332 are abutted against the two sides of the limiting cavity 34.

[0045] Specifically, when fixing the capacitor, the fixing rod 331 is stretched outward, at which time the compression spring 332 is in a compressed state, and then the capacitor is placed in the capacitor mounting hole 35, and the fixing rod 331 is released. At this time, the compression spring 332 is also in a compressed state, and the elastic force of the compression spring 332 can be used to achieve elastic crimping between the fixing rod 331 and the capacitor, and the capacitor is fixed in the mounting hole through the elastic clamping device 33, so as to achieve stable fixation of special-shaped capacitors of different sizes. Preferably, in order to protect the capacitor from damage, the contact end of the fixing rod 331 and the capacitor is covered with a soft material such as silicone.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tool for coating the end of a special-shaped ceramic dielectric capacitor, characterized in that: It includes a slurry platform, a capacitor positioning device, and a driving device for driving the capacitor positioning device to move in the longitudinal direction; The slurry platform is used to hold the slurry to be coated; a scraper is provided on the slurry platform, and the scraper can move along the length and height direction of the slurry platform to level and adjust the slurry height; The capacitor positioning device is used to fix special-shaped capacitors of different sizes; the capacitor positioning device includes a capacitor bearing platform, and a positioning socket provided at one end of the capacitor bearing platform for inserting a positioning plate; a plurality of capacitor mounting holes for placing capacitors are provided on a side of the capacitor bearing platform opposite to the positioning socket, and an elastic clamping device is also provided on one side of the capacitor mounting hole, the elastic clamping device can move along the length direction of the capacitor bearing platform, and one end of the elastic clamping device extends into the capacitor mounting hole, and is used to fix capacitors of different sizes; The driving device is arranged on one side of the slurry platform and drives the capacitor positioning device to move longitudinally above the slurry platform; The slurry platform comprises a slurry trough, a guide rail and a scraper. The slurry trough is a concave platform for containing the slurry to be coated; the guide rails are arranged on two symmetrical sides of the slurry trough, and a slider is slidably arranged on one of the guide rails; the scraper is arranged above the slurry trough, and both ends of the scraper are respectively connected to the slider; The bottom surface of the capacitor supporting platform is also provided with a limiting cavity, wherein the limiting cavity is provided between the capacitor mounting hole and the side edge of the capacitor supporting platform; The elastic clamping device comprises a fixing rod and a compression spring, one end of the fixing rod passes through the capacitor bearing platform and the limiting cavity and extends into the capacitor mounting hole; The compression spring is arranged on the fixing rod, and two ends of the compression spring abut against two sides of the limiting cavity.

2. The tooling for coating the end of a special-shaped ceramic capacitor according to claim 1 is characterized in that: The scraper is connected to the slider via a screw rod, a screw rod is vertically arranged on the slider, a screw hole is arranged at one end of the scraper, the screw rod passes through the screw hole and is fixed by a nut.

3. The tooling for coating the end of a special-shaped ceramic capacitor according to claim 2 is characterized in that: A limit spring is sleeved on the screw rod and is located between the screw rod and the scraper.

4. The tooling for coating the end of a special-shaped ceramic capacitor according to claim 1, characterized in that: Limiting grooves are arranged on both sides of the slurry tank, and a limiting block is respectively arranged at both ends of the limiting groove, and the two ends of the guide rail are respectively connected to the limiting blocks.

5. The tooling for coating the end of a special-shaped ceramic capacitor according to claim 1 is characterized in that: The driving device includes a guide column, which is arranged on one side of the slurry tank and perpendicular to the slurry tank; a guide block is slidably arranged on the guide column, and a positioning plate is arranged on the guide block, and the positioning plate is arranged parallel to the slurry tank; the capacitor positioning device is connected to the positioning plate.

6. The tooling for coating the end of a special-shaped ceramic capacitor according to claim 1 is characterized in that: Soft pads are arranged in the capacitor installation hole and at the contact end between the fixing rod and the capacitor.

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