Tantalum capacitor tantalum core plastic package positioning clamp

Abstract

The tantalum capacitor tantalum core plastic package positioning clamp comprises a base, a guide assembly, limiting blocks and a pin bonding plate, the base is provided with a groove A and a bearing platform, the guide assembly comprises a guide seat A and a guide seat B, the guide seat A and the guide seat B are arranged in the groove A, the limiting blocks are arranged on the two sides of the guide assembly, and the pin bonding plate is arranged on the guide assembly. And the pin bonding plate is arranged on the bearing platform. The guide assembly is used for transversely separating the tantalum core to be plastically packaged, the transverse position and the longitudinal position of the tantalum core on the plastic packaging mold can be determined on the clamp, when the tantalum core is plastically packaged, after the pin bonding plate is pushed to be in contact with the limiting block in the bearing platform, the pin of the tantalum core is bonded to the pin bonding plate through the high-temperature-resistant adhesive tape, and then the tantalum core is plastically packaged. And then the pin bonding plate can be directly arranged on the plastic packaging film to carry out plastic packaging on the tantalum core, so that the production efficiency and the plastic packaging quality are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of capacitor plastic sealing, and particularly relates to a tantalum capacitor tantalum core plastic sealing positioning fixture. Background Art

[0002] During the manufacturing process of tantalum capacitors, it is necessary to weld leads on both ends of the tantalum core as lead-out electrodes, and then wrap the tantalum core in plastic. For some manually welded tantalum cores, it is impossible to position the tantalum core on the plastic mold during the plastic sealing process. Therefore, it is necessary to design and develop corresponding fixtures and loading methods to clamp the corresponding tantalum cores after welding the leads.

[0003] The patent document with announcement number CN204565966U discloses a special fixture for parallel bonding of dual tantalum cores, including a base, a pressure plate, a push rod, a carrier, a positioning plate, a positioning pin B and a tantalum core; the base is provided with a groove, and the bottom of the groove is evenly provided with a push rod; the carrier is positioned by the positioning pin B and placed on the base, and the bend of the carrier is located at the top of the push rod, the tantalum core is placed at the bend of the carrier, the positioning plate is pressed on the tantalum core and the carrier, and the tantalum wire of the tantalum core is placed on the carrier and pressed by the pressure plate. The patent uses a push rod to support the bend of the carrier to ensure that the angle of the bend of the carrier does not deform when bonding the tantalum core, and ensures that the carrier will not stick to the fixture base after the tantalum core is bonded and cured; the positioning plate is used to position the carrier placed on the base to ensure the position requirements when the tantalum core is bonded. However, this fixture is not suitable for fixing the tantalum core after welding the lead, and is used for positioning in the subsequent plastic sealing process.

[0004] The patent document with announcement number CN110797190A discloses a production process for multi-core radial lead multilayer ceramic capacitors, which aims to solve the problem of size deviation between capacitors during the manufacturing of multi-core radial lead multilayer ceramic capacitors. The key points of the technical solution are: including a carrier plate, on which a plurality of row slots for accommodating capacitors are provided, the row slots are rectangular, and the four corners of the row slots are provided with clamping holes. The patent fixes the capacitors through the row slots and positions the leads through the clamping holes, but the structure is not suitable for positioning the tantalum core after the leads are welded. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a tantalum capacitor tantalum core plastic sealing positioning fixture.

[0006] The utility model is realized through the following technical solutions.

[0007] A tantalum core plastic encapsulation positioning fixture provided by the utility model comprises a base, a guiding component, a limiting block and a pin bonding plate. The base is provided with a groove A and a placing platform. The guiding component comprises a guiding seat A and a guiding seat B. The guiding seat A and the guiding seat B are arranged in the groove A. The limiting block is arranged on both sides of the guiding component. The pin bonding plate is arranged on the placing platform.

[0008] Preferably, the guiding seat A and the guiding seat B are arranged in parallel. A plurality of guiding grooves A are respectively arranged on the guiding seat A and the guiding seat B. One end of each guiding groove A is provided with a notch groove.

[0009] Preferably, the width of the guiding seat A is greater than that of the guiding seat B. A gap is arranged between the guiding seat A and the guiding seat B. The guiding grooves A are arranged in an inverted trapezoid shape. A plurality of the guiding grooves A are arranged in parallel and evenly distributed.

[0010] Preferably, the length of the pin bonding plate is less than that of the placing platform. A plurality of guiding grooves B are arranged on the pin bonding plate. A plurality of the guiding grooves B are arranged in parallel and evenly distributed.

[0011] Preferably, the base is provided with a degassing groove A, a degassing groove B and a groove B. The degassing groove A is arranged on both sides of the groove A. The degassing groove B is arranged on both sides of the placing platform. The groove B is arranged in the middle of the base.

[0012] Preferably, the base is provided with threaded holes which are symmetrically arranged on both sides of the groove A.

[0013] Preferably, the limiting block is provided with a slot and a screw. The screw passes through the limiting block through the slot and is slidably connected.

[0014] The beneficial effects of the utility model are as follows:

[0015] The guiding component of the utility model is used for horizontally separating the tantalum core to be plastic encapsulated. The gap distance between the separated guiding seat A and guiding seat B is consistent with the plastic encapsulation interval of the plastic encapsulation mold. The guiding component cooperates with the limiting block in the longitudinal direction to adjust the edge distance from the end face of the tantalum core to the pin bonding plate, and the limiting block is locked by screws. Furthermore, the horizontal and longitudinal positions of the tantalum core on the plastic encapsulation mold are determined on the fixture. When the tantalum core is plastic encapsulated, after the pin bonding plate is pushed in the placing platform to contact the limiting block, the pins of the tantalum core are adhered to the pin bonding plate with a high-temperature resistant tape, and then the pin bonding plate can be directly placed on the plastic encapsulation film to plastic encapsulate the tantalum core. By adopting this fixture, the tantalum core of the two-terminal lead tantalum capacitor can be conveniently positioned and plastic encapsulated on the plastic encapsulation mold, avoiding the situation that it is difficult to unify the positions and the poor molding consistency when the operator places a plurality of tantalum cores on the plastic encapsulation mold, and further avoiding the problems of core exposure and core damage. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a schematic structural diagram of the present utility model;

[0018] Figure 3 is a schematic structural diagram of the limit block of the present utility model;

[0019] Figure 4 is a schematic structural diagram of the screw of the present utility model;

[0020] Figure 5 is a schematic structural diagram of the pin bonding plate of the present utility model;

[0021] Figure 6 is a schematic structural diagram of the tantalum core and pins of the present utility model;

[0022] Figure 7 is a schematic structural diagram of the tantalum core and pins of the present utility model;

[0023] Figure 8 is a schematic structural diagram of area A of the present utility model;

[0024] Figure 9 is a schematic diagram of the first step of the using method of the fixture of the present utility model;

[0025] Figure 10 is a schematic diagram of the second step of the using method of the fixture of the present utility model;

[0026] Figure 11 is a schematic diagram of the third step of the using method of the fixture of the present utility model;

[0027] In the figure: 1 - base, 11 - groove A, 12 - placing platform, 13 - air venting groove A, 14 - air venting groove B, 15 - groove B, 16 - threaded hole, 2 - limit block, 21 - slot, 22 - screw, 3 - pin bonding plate, 31 - guiding groove B, 4 - guiding seat A, 41 - gap, 5 - guiding seat B, 6 - guiding groove A, 61 - notch groove, 7 - tantalum core, 8 - pin, 9 - high-temperature resistant tape. Specific embodiments

[0028] The technical solution of the present utility model will be further described below, but the scope of protection claimed is not limited thereto.

[0029] Embodiment:

[0030] As Figures 1 to 8As shown in the figure, a plastic encapsulation positioning fixture for a tantalum capacitor tantalum core includes a base 1, a guiding component, a limiting block 2, and a pin bonding plate 3. The base 1 is provided with a groove A11 and a placing platform 12. The guiding component includes a guiding seat A4 and a guiding seat B5. The guiding seat A4 and the guiding seat B5 are arranged in the groove A11. The limiting block 2 is arranged on both sides of the guiding component. The pin bonding plate 3 is arranged on the placing platform 12. The width dimension of the placing platform 12 is the same as that of the corresponding plastic encapsulation mold. The limiting block and the guiding seat B5 are adjusted and limited by a round head screw 22. Both sides of the placing platform 12 are convex. The pin bonding plate 3 can slide and adjust within the placing platform 12.

[0031] The guiding seat A4 and the guiding seat B5 are arranged in parallel. A plurality of guiding grooves A6 are respectively arranged on the guiding seat A4 and the guiding seat B5. One end of each guiding groove A6 is provided with a notch groove 61. The diameter of the notch groove 61 is smaller than the diameter of the tantalum core 7, which is used to avoid the weld scars remaining after the welding of the tantalum core 7 and the pins 8, so as to facilitate the fitting and positioning of the end face of the tantalum core 7 and the corresponding end face of the guiding seat A4 or the guiding seat B5. The spacing between the guiding grooves A6 is the same as that of the corresponding plastic encapsulation mold, which is used for the fixture to clamp the pins 8 and position them horizontally.

[0032] The width of the guiding seat A4 is greater than the width of the guiding seat B5. A gap 41 is arranged between the guiding seat A4 and the guiding seat B5. The guiding grooves A6 are arranged in an inverted trapezoid shape. A plurality of the guiding grooves A6 are arranged in parallel and evenly distributed.

[0033] The length of the pin bonding plate 3 is smaller than the length of the placing platform 12. A plurality of guiding grooves B31 are arranged on the pin bonding plate 3. A plurality of the guiding grooves B31 are arranged in parallel and evenly distributed. The guiding grooves B31 are arranged in an inverted trapezoid shape. The two sides of the guiding grooves B31 are inclined at an angle of 45°. The depth of the guiding grooves B31 should ensure that after the pins 8 of the tantalum core 7 are placed, a part of the outer circle of the pins 8 is exposed above the top surface of the pin bonding plate 3, which is convenient for bonding and fixing with a high-temperature resistant tape 9.

[0034] The guiding grooves B31 are arranged coaxially and at the same distance as the guiding grooves A6 of the guiding seat A4 and the guiding grooves A6 of the guiding seat B5. The bottom surfaces of the guiding grooves B31, the guiding grooves A6 of the guiding seat A4, and the guiding grooves A6 of the guiding seat B5 are at the same height, ensuring that each tantalum core 7 with pins 8 can maintain the same posture in the positioning fixture.

[0035] The base 1 is provided with an air vent groove A13, an air vent groove B14 and a groove B15. The air vent groove A13 is arranged on both sides of the groove A11. The air vent groove A13 facilitates the fitting and installation of the limit block 2 and the guide seat B5, and is conducive to the pins 8 being completely placed in the guide groove A6 when the tantalum core 7 is in a suspended state. The air vent groove B14 is arranged on both sides of the placement platform 12, facilitating the fitting of the pin bonding plate 3 and the guide seat B5. The groove B15 is arranged in the middle of the base 1, facilitating the taking and placing of the pin bonding plate 3.

[0036] The base 1 is provided with threaded holes 16, and the threaded holes 16 are symmetrically arranged on both sides of the groove A11.

[0037] The limit block 2 is provided with a slot 21 and a screw 22. The screw 22 passes through the limit block 2 through the slot 21 and is slidably connected.

[0038] A method for using a tantalum core plastic encapsulation positioning fixture for a tantalum capacitor includes the following steps:

[0039] The first step, as Figure 9 :

[0040] First, select two tantalum cores 7 to be plastic encapsulated and place them on the plastic encapsulation mold. After adjusting to meet the process requirements, place the pin bonding plate 3 on the placement platform 12 and press closely, and then use the high-temperature resistant tape 9 to fix the pins 8 of the two tantalum cores to complete the preparation of the plastic encapsulation standard sample;

[0041] The second step, as Figure 10 :

[0042] Fit the end face of the tantalum core 7 with the end face of the guide seat B5 on the side of the guide seat A4, then push the limit block 2 to fit with the pin bonding plate 3, and finally pass the round head screw 22 through the limit block 2 and connect it with the threaded hole 16 to lock the limit block 2. At this time, the dimension of the positioning of the tantalum core 7 on the plastic encapsulation mold is locked;

[0043] The third step, as Figure 11 :

[0044] Place the tantalum core 7 in the other guide groove B31 locked on the fixture in the second step. After placing, use the high-temperature resistant tape 9 to bond to complete the positioning of the tantalum core 7. At this time, the pin bonding plate 3 with the bonded tantalum core 7 can be removed for plastic encapsulation by the plastic encapsulation mold.

[0045] Figure 11 The dimension of the distance a in

[0046] is the dimension that needs to be positioned on the plastic encapsulation mold. Through this fixture, this dimension can be replicated, facilitating subsequent operations. During the use process, a large number of pin bonding plates 3 are required. To improve efficiency, the pin bonding plate 3 can be made of thin aluminum plates, and a mold is designed for stamping production to reduce the processing cost.

Claims

1. A tantalum capacitor tantalum core plastic sealing positioning fixture, characterized by: The invention comprises a base (1), a guide assembly, a limit block (2) and a pin bonding plate (3); the base (1) is provided with a groove A (11) and a receiving platform (12); the guide assembly comprises a guide seat A (4) and a guide seat B (5); the guide seat A (4) and the guide seat B (5) are arranged in the groove A (11); the limit block (2) is arranged on both sides of the guide assembly; and the pin bonding plate (3) is arranged on the receiving platform (12).

2. A tantalum capacitor tantalum core plastic sealing positioning fixture as claimed in claim 1, characterized in that: The guide seat A (4) and the guide seat B (5) are arranged in parallel. A plurality of guide grooves A (6) are arranged on the guide seat A (4) and the guide seat B (5), respectively. A notch groove (61) is arranged at one end of the guide groove A (6).

3. A tantalum capacitor tantalum core plastic sealing positioning fixture as claimed in claim 2, characterized in that: The width of the guide seat A (4) is greater than the width of the guide seat B (5), a gap (41) is provided between the guide seat A (4) and the guide seat B (5), the guide groove A (6) is provided in an inverted trapezoidal shape, and a plurality of the guide grooves A (6) are provided in parallel and evenly distributed.

4. The tantalum capacitor tantalum core plastic sealing positioning fixture according to claim 1, characterized in that: The length of the pin bonding plate (3) is smaller than the length of the supporting platform (12), and a plurality of guide grooves B (31) are arranged on the pin bonding plate (3), and the plurality of guide grooves B (31) are arranged in parallel and evenly distributed.

5. The tantalum capacitor tantalum core plastic sealing positioning fixture according to claim 1, characterized in that: The base (1) is provided with a degassing groove A (13), a degassing groove B (14) and a groove B (15); the degassing groove A (13) is provided on both sides of the groove A (11); the degassing groove B (14) is provided on both sides of the supporting platform (12); and the groove B (15) is provided in the middle of the base (1).

6. The tantalum capacitor tantalum core plastic sealing positioning fixture according to claim 1, characterized in that: The base (1) is provided with threaded holes (16), and the threaded holes (16) are symmetrically arranged on both sides of the groove A (11).

7. The tantalum capacitor tantalum core plastic sealing positioning fixture according to claim 1, characterized in that: The limiting block (2) is provided with a slot (21) and a screw (22), and the screw (22) passes through the slot (21) and penetrates the limiting block (2) and is slidably connected.

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