A device and method for sealing edges of a laminated aluminum electrolytic capacitor core with silver paste

Abstract

A device for sealing the edges of laminated aluminum electrolytic capacitor cores with silver paste includes a spraying track mechanism comprising a track plate, a conveyor belt, a limiting component, and a tilting component. The track plate has a conveying trough with two parallel conveyor belts running within it. The limiting component includes a limiting plate, a limiting stop bar, and a positioning pin. Two limiting plates are symmetrically fixed on the track plate, forming a conveying channel for the lead frame with the conveying trough. The limiting stop bar is connected to a limiting cylinder and positioned at the track's discharge end. The positioning pin is positioned in front of the limiting stop bar, and the lead frame has a through hole matching the positioning pin. The tilting component is positioned between the track plate and a base, tilting the track plate at a preset angle. The spraying mechanism is positioned above the limiting plate. In this invention, silver paste is sprayed onto the negative end gap and end face of the stacked aluminum foil on the lead frame using a piezoelectric spray valve, resulting in precise spraying volume and position.

Description

Technical Field

[0001] This invention relates to a production equipment for multilayer aluminum electrolytic capacitors, and more particularly to a device and method for sealing the core of multilayer aluminum electrolytic capacitors with silver paste. Background Technology

[0002] In the production of multilayer aluminum electrolytic capacitors, such as the multilayer capacitor disclosed in patent CN107946075A, the aluminum foils are connected together by adhesive silver paste. However, the adhesive silver paste does not cover the entire contact surface between the negative aluminum foils. This results in a longer conductive path at the negative terminal of the aluminum foil that does not contact the negative lead. Currently, the common practice is to spray a layer of silver paste onto the end of the negative terminal for edge sealing. This silver paste edge sealing layer conducts electricity directly to the negative lead, thereby reducing the conductive path at the negative terminal of the core.

[0003] Currently, the method for spraying sealing silver paste onto the negative terminal involves stacking aluminum foil on the lead frame and then manually applying the silver paste to the negative terminal surfaces of two adjacent aluminum foils using a pneumatic dispensing valve. However, this manual dispensing method prevents the silver paste from penetrating evenly into the gaps between the negative terminals of each aluminum foil layer, resulting in poor product consistency and inability to integrate with the production line. Furthermore, if the amount of silver paste is too large or too thick, it will naturally level out when placed in the material box, causing the silver paste to flow from the dispensed aluminum foil negative terminal to the negative terminal lead-out terminal. After encapsulation, this silver paste will directly connect with the inside and outside of the package, resulting in poor encapsulation sealing and a shorter lifespan for the multilayer aluminum electrolytic capacitor. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a device and method for sealing the silver paste edge of the core of a multilayer aluminum electrolytic capacitor that can be connected to the production line.

[0005] To solve the above-mentioned technical problems, the technical solution proposed by this invention is as follows: a device for sealing the edges of multilayer aluminum electrolytic capacitor cores with silver paste, comprising a lead frame feeding mechanism, a feeding end conveying mechanism, a glue spraying track mechanism, a glue spraying mechanism, and an output mechanism arranged sequentially; the glue spraying track mechanism includes a track plate, a conveyor belt, a limiting component, and an tilting component; a conveying groove is provided on the track plate, and two conveyor belts are arranged parallel to each other in the conveying groove; the limiting component includes a limiting plate, a limiting stop bar, and a positioning pin, and the two limiting plates are symmetrically fixed on the track plate. A conveying channel forming a lead frame with the conveying trough is provided. The limiting stop is connected to the limiting cylinder and arranged at the track outlet end. The positioning pin is located in front of the limiting stop. The lead frame has a through hole that matches the positioning pin. The positioning pin is connected to the cylinder. The tilting component is located between the track plate and the base, so that the track plate is tilted at a preset angle. The glue spraying mechanism is located above the limiting plate. The lead frame feeding mechanism pushes the lead frame out of the material box and conveys it to the feeding end conveying mechanism. The output mechanism conveys the lead frame from the glue spraying track mechanism back into the material box.

[0006] In the aforementioned device for sealing the silver paste edges of the laminated aluminum electrolytic capacitor core, preferably, the material box contains multiple lead frame receiving slots arranged side by side.

[0007] In the aforementioned device for sealing the silver paste edge of the laminated aluminum electrolytic capacitor core, preferably, the tilting component includes a gear and a rack meshing with the gear. The gear is fixedly connected to the track plate, and the rack is mounted on the base via a slide rail. The rack is connected to a cylinder.

[0008] Preferably, in the above-mentioned device for sealing the edge of the core of a multilayer aluminum electrolytic capacitor with silver paste, the adhesive spraying mechanism includes a piezoelectric spray valve and an adhesive spraying XYZ triaxial module, wherein one or more piezoelectric spray valves are provided on the adhesive spraying XYZ triaxial module; the nozzle of the piezoelectric spray valve is directly facing the sealing position of the core on the lead frame.

[0009] Preferably, in the aforementioned device for sealing the silver paste edges of the multilayer aluminum electrolytic capacitor core, the lead frame feeding mechanism includes a feeding push rod, a pushing module, and a material box moving module. The feeding push rod is connected to the pushing module; the feeding push rod is directly opposite the feeding port of the material box; the pushing module includes a pushing slide rail and a pushing slide base, with the pushing slide base disposed on the pushing slide rail; the feeding push rod is connected to the pushing slide base; and the material box is disposed on the material box moving module.

[0010] Preferably, in the above-mentioned device for sealing the silver paste edge of the multilayer aluminum electrolytic capacitor core, the feeding end conveying mechanism includes a first conveying base and a first conveying wheel group, wherein the first conveying base is provided with a feeding groove; the first conveying wheel group includes a first driving wheel and a first driven wheel, wherein the first driving wheel and the first driven wheel are respectively disposed on the first conveying base; the first driving wheel and the first driven wheel are disposed opposite to each other, and the side of the lead frame is clamped and pushed through by the first driving wheel and the first driven wheel.

[0011] Preferably, in the above-mentioned device for sealing the silver paste edge of the multilayer aluminum electrolytic capacitor core, the first conveying base is connected to the rotating shaft, the rotating shaft is connected to the rotary motor, the rotating shaft and the conveying base are connected by a connecting block, and the center of the conveying shaft is on the same horizontal plane as the lead frame between the power wheel and the driven wheel.

[0012] Preferably, in the above-mentioned device for sealing the silver paste edge of the multilayer aluminum electrolytic capacitor core, the output mechanism includes a feeding end conveying mechanism and a material box moving module; the feeding end conveying mechanism includes a second conveying base, a second conveying wheel group, and a feeding push rod assembly, wherein a feeding groove is provided on the second conveying base; the second conveying wheel group includes a second driving wheel and a second driven wheel, which are respectively disposed on the second conveying base; the second driving wheel and the second driven wheel are arranged opposite to each other, and the lead frame passes between the second driving wheel and the second driven wheel; the feeding push rod assembly includes a feeding push rod, a feeding lifting cylinder, and a feeding cylinder, wherein the feeding push rod is connected to the feeding lifting cylinder, and the feeding lifting cylinder is connected to the feeding cylinder; the outlet end of the feeding groove is directly opposite the inlet of the material box, and the feeding push rod pushes the lead frame on the feeding groove into the material box; the material box is disposed on the material box moving module.

[0013] Preferably, in the above-mentioned device for sealing the silver paste edge of the laminated aluminum electrolytic capacitor core, the material box moving module includes a material box Y-axis module and a material box lifting device; the material box is disposed on the material box Y-axis module and the material box Y-axis module is disposed on the material box lifting device.

[0014] A method for sealing the edge of a multilayer aluminum electrolytic capacitor core with silver paste, using the aforementioned apparatus for sealing the edge of a multilayer aluminum electrolytic capacitor core with silver paste; comprising the following steps:

[0015] 1) The lead frame feeding mechanism pushes the lead frame out of the material box and into the feeding end conveyor mechanism;

[0016] 2) The feeding end conveyor conveys the lead frame to the glue spraying track mechanism. After the glue spraying track mechanism tilts, the lead frame is conveyed to the position of the glue spraying mechanism under the action of the drive belt of the glue spraying track mechanism.

[0017] 3) The adhesive spraying mechanism sprays silver paste onto the bottom edge of the negative terminal of the core on the lead frame;

[0018] 4) The output mechanism pushes the lead frame processed in step 3) into the material box.

[0019] In the above-mentioned method for sealing the core of a multilayer aluminum electrolytic capacitor with silver paste, preferably, in step 3), after the glue spraying mechanism sprays silver paste on one side of the core on the lead frame, it returns to the loading end conveyor mechanism via the transmission belt of the glue spraying track mechanism. After the lead frame is rotated 180°, the loading end conveyor mechanism conveys the lead frame to the glue spraying track mechanism for the second time. Under the action of the transmission belt of the glue spraying track mechanism, the lead frame is conveyed to the position of the glue spraying mechanism for the second time, and silver paste is sprayed on the bottom edge of the negative end of the core on the other side of the lead frame.

[0020] Compared with the prior art, the advantages of the present invention are as follows: In the present invention, the silver paste is sprayed between the negative electrode areas of the stacked aluminum foil on the lead frame using a piezoelectric spray valve, resulting in more precise spraying volume and position. Furthermore, the silver paste sealing device for the laminated aluminum electrolytic capacitor core of this application allows the lead frame to be pushed out of the material box and then stored back in during the silver paste sealing process, making it suitable for production line assembly. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the device for sealing the core of the multilayer aluminum electrolytic capacitor with silver paste in Example 1.

[0022] Figure 2 This is a schematic diagram of the device for sealing the core of a multilayer aluminum electrolytic capacitor with silver paste in Example 1.

[0023] Figure 3 This is a schematic diagram of the lead frame feeding mechanism and the material box moving module in Example 1.

[0024] Figure 4 This is a schematic diagram of the lead frame feeding mechanism, material box, and feeding end conveying mechanism in Example 1.

[0025] Figure 5 This is a schematic diagram of the feeding end conveying mechanism in Example 1.

[0026] Figure 6 This is a schematic diagram of the structure of the first transmission wheel assembly in Embodiment 1.

[0027] Figure 7 This is a schematic diagram of the adhesive spraying track, the loading end conveying mechanism, and the unloading end conveying mechanism in Example 1.

[0028] Figure 8 for Figure 7 A magnified structural diagram of point A.

[0029] Figure 9 This is a schematic diagram of the adhesive spraying mechanism in Example 1.

[0030] Figure 10 This is a schematic diagram of the material feeding end conveying mechanism, material box, and material box moving module in Example 1.

[0031] Figure 11 This is a schematic diagram of the feeding pusher assembly in Example 1.

[0032] Figure 12 This is a schematic diagram of the material box structure in Example 1.

[0033] Figure 13 for Figure 12 A magnified structural diagram at point B in the middle.

[0034] Figure 14 This is a schematic diagram of the lead frame structure.

[0035] Explanation of reference numerals in the attached figures

[0036] 1. Lead frame feeding mechanism; 11. Feeding push rod; 12. Pushing module; 121. Pushing slide rail; 122. Pushing slide block;

[0037] 2. Feeding end conveying mechanism; 21. First conveying base; 211. Feeding trough; 22. First conveying wheel set; 221. First power wheel; 222. First driven wheel; 23. Rotating shaft; 24. Connecting block; 25. Rotary motor;

[0038] 3. Glue spraying track mechanism; 31. Track plate; 311. Conveying trough; 32. Limiting assembly; 321. Limiting plate; 322. Limiting stop bar; 323. Limiting cylinder; 324. Positioning pin; 33. Transmission belt; 34. Inclining assembly; 341. Gear; 342. Rack;

[0039] 4. Glue spraying mechanism; 41. Piezoelectric glue spraying valve; 411. Nozzle; 42. X-axis module; 421. X-axis slide rail; 422. X-axis slide block; 43. Z-axis module; 431. Z-axis slide rail; 432. Z-axis slide block; 44. Y-axis fine-tuning assembly; 441. Fine-tuning screw; 442. Fixing pin;

[0040] 5. Material feeding end conveying mechanism; 51. Second conveying base; 511. Material feeding trough; 52. Second conveying wheel assembly; 521. Second power wheel; 522. Second driven wheel; 53. Material feeding push rod assembly; 531. Material feeding push rod; 532. Material feeding lifting cylinder; 533. Material feeding cylinder;

[0041] 6. Material box moving module; 61. Material box Y-axis module; 62. Material box lifting device; 7. Material box; 71. Receiving slot; 8. Lead frame; 9. Aluminum foil. Detailed Implementation

[0042] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below with reference to preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0043] It should be noted that when a component is described as being "fixed to, attached to, connected to or connected to" another component, it can be directly fixed to, attached to, connected to or connected to the other component, or it can be indirectly fixed to, attached to, connected to or connected to the other component through other intermediate connectors.

[0044] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

[0045] Example 1

[0046] like Figure 1 and Figure 2 The device shown is for sealing the edges of a multilayer aluminum electrolytic capacitor core with silver paste. It includes a lead frame 8, a lead frame feeding mechanism 1, a feeding end conveying mechanism 2, a glue spraying track mechanism 3, a glue spraying mechanism 4, and an output mechanism arranged sequentially. Figure 7 As shown, the glue spraying track mechanism 3 includes a track plate 31, a limiting component 32, a transmission belt 33, and a tilting component 34. A conveying groove 311 is provided on the track plate 31, and two transmission belts 33 are arranged parallel to each other within the conveying groove 311. The transmission belts 33 are driven by stepper motors. The transmission belts can be made of leather or rubber. Figure 9 As shown, the limiting component 32 includes a limiting plate 321 and a limiting stop bar 322. The two limiting plates 321 are symmetrically fixed on the track plate 31 and form a conveying channel for the lead frame on the lead frame 8 with the conveying groove 311. The limiting stop bar is connected to the limiting cylinder 323 and is located at the end of the limiting plate 321 where the material is discharged.

[0047] In this embodiment, as Figure 8 As shown, the tilting component 34 is disposed between the track plate 31 and the base, causing the track plate 31 to tilt at a preset angle; the glue spraying mechanism 4 is disposed on one side of the limiting plate 321. The tilting component 34 includes a gear 341 and a rack 342 meshing with the gear 341. The gear 341 is fixedly connected to the track plate 31, and the rack 342 is disposed on the base via a slide rail and is connected to a cylinder. In this embodiment, after the lead frame 8 on the track plate 31 is sealed with silver paste, the tilting component 34 is activated, making the track plate 31 horizontal, so as to receive the next lead frame 8.

[0048] In this embodiment, when the lead frame 8 moves to the position of the limiting stop bar within the conveying groove 311, the limiting stop bar descends under the action of the limiting cylinder 323, blocking one end of the lead frame 8. Simultaneously, the side of the lead frame 8 is restricted by the limiting plate 321, thus ensuring a relatively stable state for the lead frame 8 during silver paste spraying. After the silver paste sealing is completed, the limiting stop bar is lifted by the limiting cylinder 323, thereby releasing the restriction on the lead frame 8.

[0049] In this embodiment, since both the lead frame 8 and the limiting stop 322 are made of metal, the lead frame 8 will slightly collide with the limiting stop 322 under the action of the transmission belt. During the collision, the lead frame 8 may slightly bounce on the transmission belt, causing the silver paste sprayed by the glue spraying mechanism 4 to be inaccurate. In this embodiment, a positioning pin 324 is provided on the travel path of the lead frame 8. When the positioning hole on the lead frame 8 moves above the positioning pin 324, that is, when the lead frame 8 contacts the limiting stop 322, the positioning pin 324 passes through the track plate 31 and inserts into the positioning hole on the lead frame 8. Because the top of the positioning pin 324 is pointed and the diameter of the bottom is the same as the diameter of the positioning hole, even if the lead frame slightly bounces after contacting the limiting stop, the positioning pin can still be inserted into the positioning hole to complete the positioning of the lead frame.

[0050] In this embodiment, as Figure 9As shown, the glue spraying mechanism 4 includes a piezoelectric jet valve 41 and a glue spraying XYZ three-axis module. One or more piezoelectric jet valves 41 are provided on the glue spraying XYZ three-axis module. The nozzle 411 of the piezoelectric jet valve 41 is directly opposite the sealing edge of the core on the lead frame 8. In this embodiment, the glue spraying XYZ three-axis module can be a conventional three-axis module. Alternatively, as shown in this embodiment, the glue spraying XYZ three-axis module can include an X-axis module 42, a Y-axis fine-tuning component 44, and a Z-axis module 43. The X-axis module 42 includes an X-axis slide rail 421 and an X-axis slide block 422; the Z-axis module 43 includes a Z-axis slide rail 431 and a Z-axis slide block 432; the piezoelectric jet valve 41 is fixedly mounted on the Z-axis slide block 432. The X-axis slide rail 421 is mounted on the frame, and the X-axis slide block 422 is mounted on the X-axis slide rail 421 and can be fixed with bolts. The Z-axis slide rail 431 is mounted on the X-axis slide block 422, and the Z-axis slide block 432 is mounted on the Z-axis slide rail 431 and can be fixed with bolts. In this embodiment, a Y-axis fine-tuning assembly 44 is provided between the X-axis slide block 422 and the Z-axis slide rail 431. The Y-axis fine-tuning assembly 44 includes a fine-tuning screw 441, a connecting pin, and a fixing screw 442. The Z-axis slide rail 431 is provided with a connecting pin, and the X-axis slide block 422 is provided with a connecting hole for connecting the connecting pin. The connecting pin is disposed in the connecting hole, and the fixing screw 422 extends from the side of the X-axis slide block 422 to the position of the connecting pin and holds the connecting pin in place. In this embodiment, the fine-tuning screw 441 passes through the X-axis slide block 422 and rests on the Z-axis slide rail 431. The X-axis slide block 422 is provided with a thread that matches the fine-tuning screw 441. By rotating the fine-tuning screw 441, the position of the piezoelectric injection valve 41 can be finely adjusted in the Y-axis direction. In this embodiment, the X-axis module and the Z-axis module can be conventional linear modules.

[0051] In this embodiment, there is a gap between the negative ends of two adjacent aluminum foils 9 stacked on the lead frame 8, and the width of this gap is generally 10-60 micrometers. During the silver paste spraying and sealing process, the rack 342 of the tilting component 34, under the action of the cylinder, drives the track plate 31 to rotate, causing the track plate 31 to tilt at a certain angle, generally 45°-65°. In this way, the position of the core on the lead frame 8 in the conveying groove 311 of the track plate 31 that needs to be sprayed with silver paste is directly aligned with the nozzle 411 of the piezoelectric spray valve 41. The silver paste sprayed by the piezoelectric spray valve 41 can be directly sprayed into the gap between the negative ends of two adjacent aluminum foils 9, thus eliminating the need for the penetration time of traditional manual silver paste application.

[0052] In this embodiment, the piezoelectric spray valve 41 sprays silver paste between the negative electrode areas of the stacked aluminum foil 9 on the lead frame 8, achieving precise and deep spraying in terms of both amount and location. Simultaneously, the silver paste sealing device for the laminated aluminum electrolytic capacitor core of this application allows the lead frame 8 to be pushed out of the material box 7 and then retracted into it during the silver paste sealing process, making it suitable for production line assembly.

[0053] In this embodiment, a single piezoelectric injection valve 41 can only spray silver paste to seal one core on the lead frame 8 at a time; after each spray, the adhesive spraying X-axis module 43 moves one position to spray silver paste to seal the next core on the lead frame 8. In this embodiment, three aluminum foils 9 are stacked on one side of the lead frame 8, so there are three gaps between the aluminum foils and between the aluminum foils and the lead terminals that need to be sealed with silver paste; therefore, in this embodiment, the piezoelectric injection valve 41 assembly is provided with three piezoelectric injection valves 41, each corresponding to one gap between the aluminum foils 9.

[0054] In this embodiment, the piezoelectric jet valve 41 is controlled individually, so that a single piezoelectric jet valve 41 can spray silver paste to seal the core on the lead frame 8, or multiple piezoelectric jet valves 41 can spray silver paste to seal the core on the lead frame 8; thus, it is suitable for spraying silver paste to seal the core with different numbers of aluminum foils 9; by changing the nozzles of different diameters of the piezoelectric jet valve, a single piezoelectric jet valve can also correspond to the gap of multiple layers being sprayed.

[0055] In this embodiment, the lead frame 8 feeder pushes the lead frame 8 out of the material box 7; the output mechanism pushes the lead frame 8 into the material box 7; multiple receiving slots 71 for the lead frame 8 are arranged side by side in the material box 7; the structure of the material box 7 is as follows: Figure 12 and Figure 13 As shown.

[0056] In this embodiment, as Figure 3 and Figure 4 As shown, the lead frame feeding mechanism 1 includes a feeding push rod 11, a pushing module 12, and a material box moving module 6. The feeding push rod 11 is connected to the pushing module 12; the feeding push rod 11 is directly opposite the feeding port of the material box 7. The pushing module 12 includes a pushing slide rail 121 and a pushing slide block 122. The pushing slide block 122 is mounted on the pushing slide rail 121 and is driven by a belt connected to a stepper motor. The feeding push rod 11 is connected to the pushing slide block 122. The material box 7 is mounted on the material box moving module 6. The material box moving module 6 includes a material box Y-axis module 61 and a material box lifting device 62; the material box 7 is mounted on the material box Y-axis module 61, and the material box Y-axis module 61 is mounted on the material box lifting device 62. In this embodiment, the material box Y-axis module 61 can be a general linear module, and the material box lifting device 62 can lift the material box 7 and the material box Y-axis module 61.

[0057] In this embodiment, the lead frame 8 without silver paste is placed inside the material box 7. The feeding push rod 11 pushes the lead frames 8 in the material box 7 sequentially to the feeding end conveying mechanism 2. After the feeding push rod 11 pushes out one lead frame 8 under the action of the pushing module 12, it resets. The material box 7 rises one position under the action of the lifting module, so that the next lead frame 8 in the material box 7 rises to the position corresponding to the feeding push rod 11, and the feeding push rod 11 continues to push out the lead frame 8.

[0058] In this embodiment, multiple material boxes 7 can be provided on the Y-axis module 61 of the material box. Figure 3 The display shows that there are 3 material boxes 7. After the lead frame 8 in the current material box 7 is pushed by the feeding push rod 11, the Y-axis module moves so that the next material box 7 is facing the feeding push rod 11. In this way, the feeding push rod 11 can continuously feed materials, reducing the frequency of device pauses caused by manual loading of material boxes 7.

[0059] In this embodiment, as Figure 5 As shown, the feeding end conveying mechanism 2 includes a first conveying base 21 and a first conveying wheel set 22, and a feeding trough 211 is provided on the first conveying base 21. Figure 6 As shown, the first conveying wheel group 22 includes a first driving wheel 221 and a first driven wheel 222, which are respectively disposed on the first conveying base 21. The first driving wheel 221 and the first driven wheel 222 are disposed opposite to each other, and the side of the lead frame 8 is clamped and pushed through by the first driving wheel 221 and the first driven wheel 222.

[0060] In this embodiment, the feeding push rod 11 pushes the lead frame 8 into the feeding groove 211 on the first conveying base 21 until the first conveying wheel set 22 can push the lead frame 8, at which point the feeding push rod 11 returns to its original position. Multiple sets of the first conveying wheel set 22 can be provided to accommodate the lead frame 8 being transported a sufficient distance. In this embodiment, two sets of the first conveying wheel set 22 are provided, and the first power wheel 221 of both sets of the first conveying wheel set 22 is driven by a single motor. The first conveying wheel set 22 horizontally conveys the lead frame 8 into the conveying groove 311 of the track plate 31 and is driven by the transmission belt 33.

[0061] In this embodiment, the output mechanism includes a material feeding end conveying mechanism 5 and a material box moving module 6. For example... Figure 10As shown, the structure of the unloading end conveying mechanism 5 is similar to that of the loading end conveying mechanism 2. The unloading end conveying mechanism 5 includes a second conveying base 51, a second conveying wheel set 52, and an unloading push rod 531 assembly 53. The second conveying base 51 is provided with a unloading groove 511. The second conveying wheel set 52 is provided with two sets. The second transmission wheel set includes a second driving wheel 521 and a second driven wheel 522. The second driving wheel 521 and the second driven wheel 522 are respectively provided on the second conveying base 51. The second driving wheel 521 and the second driven wheel 522 are arranged opposite to each other, and the lead frame 8 passes between the second driving wheel 521 and the second driven wheel 522.

[0062] In this embodiment, as Figure 11 As shown, the unloading push rod 531 assembly 53 includes an unloading push rod 531, an unloading lifting cylinder 532, and an unloading cylinder 533. The unloading push rod 531 is connected to the unloading lifting cylinder 532, and the unloading lifting cylinder 532 is connected to the unloading cylinder 533. The outlet end of the unloading groove 511 faces the inlet of the material box 7. The unloading push rod 531 pushes the lead frame 8 on the unloading groove 511 into the material box 7. The material box 7 is set on the material box moving module 6. In this embodiment, the lead frame 8, after being sealed with silver paste, enters the unloading groove 511 under the action of the transmission belt 33 and is clamped and driven by the second transmission wheel group 52. When the lead frame 8 is stored in the material box 7, the lead frame 8 has no power to push after passing the second transmission wheel group 52. At this time, the unloading push rod 531 is needed to push it. When the lead frame 8 passes the feeding push rod 531, the feeding push rod 531 is above the lead frame 8; when the feeding push rod 531 needs to push, the feeding push rod 531 is lowered under the action of the feeding lifting cylinder 532, and then the feeding cylinder 533 pushes the lead frame horizontally into the material box 7.

[0063] In this embodiment, the material box 7 for storing the lead frame 8 is mounted on a material box moving module 6. The material box moving module 6 includes a material box Y-axis module 61 and a material box lifting device 62. The material box 7 is mounted on the material box Y-axis module 61, and the material box Y-axis module 61 is mounted on the material box lifting device 62. The material box moving module 6 moves the material box 7 up and down so that the lead frame 8 is sequentially stored in the material box 7. When one material box 7 is full, the Y-axis module moves to store the lead frame 8 in the next material box 7.

[0064] In this embodiment, as Figure 14As shown, when aluminum foil 9 is stacked on both sides of the lead frame 8, the cores on both sides of the lead frame 8 need to be edge-sealed with silver paste. At this time, the lead frame 8 first performs silver paste edge-sealing on the first side of the core. Then, under the action of the transmission belt 33 in the conveyor groove 311 on the track plate 31, the lead frame 8 returns to the feeding end conveyor mechanism 2. The feeding end conveyor mechanism 2 rotates 180 degrees, causing the lead frame 8 to flip over, and then the feeding end conveyor mechanism 2 pushes the lead frame 8 into the conveyor groove 311 on the track plate 31 for silver paste edge-sealing on the other side of the core.

[0065] In this embodiment, in order to make the feeding end conveying mechanism 2 rotate 180°, the first conveying base 21 is connected to the rotating shaft 23, the rotating shaft 23 is connected to the rotary motor 25, and the rotating shaft 23 and the conveying base are connected by the connecting block 24. The center of the conveying shaft is on the same horizontal plane as the lead frame 8 between the power wheel and the driven wheel.

[0066] This embodiment also provides a method for sealing the edges of a multilayer aluminum electrolytic capacitor core with silver paste, using the aforementioned apparatus for sealing the edges of a multilayer aluminum electrolytic capacitor core with silver paste; including the following steps:

[0067] 1) The lead frame 8 is pushed out of the material box 7 by the lead frame feeding mechanism 1 and enters the feeding end conveying mechanism 2;

[0068] 2) The feeding end conveying mechanism 2 conveys the lead frame 8 into the glue spraying track mechanism 3. After the glue spraying track mechanism 3 tilts, the lead frame 8 is conveyed to the position of the glue spraying mechanism 4 under the action of the transmission belt 33 of the glue spraying track mechanism 3.

[0069] 3) The adhesive spraying mechanism 4 sprays silver paste onto the bottom edge of the negative terminal of the core on the lead frame 8;

[0070] 4) The output mechanism pushes the lead frame 8 processed in step 3) into the material box 7.

[0071] In step 3), after the glue spraying mechanism 4 sprays silver paste onto the core on one side of the lead frame 8, it returns to the loading end conveyor mechanism 2 via the transmission belt 33 of the glue spraying track mechanism 3. After the lead frame 8 is rotated 180°, the loading end conveyor mechanism 2 conveys the lead frame 8 to the glue spraying track mechanism 3 for the second time. Under the action of the transmission belt 33 of the glue spraying track mechanism 3, the lead frame 8 is conveyed to the position of the glue spraying mechanism 4 for the second time, and silver paste is sprayed onto the bottom edge of the negative end of the core on the other side of the lead frame 8.

Claims

1. An apparatus for sealing the edges of a silver paste of a stacked aluminum electrolytic capacitor core, characterized by: The system includes a lead frame feeding mechanism, a feeding end conveying mechanism, a glue spraying track mechanism, a glue spraying mechanism, and an output mechanism arranged sequentially. The glue spraying track mechanism includes a track plate, a conveyor belt, a limiting component, and an tilting component. The track plate has a conveying groove, and two drive belts are arranged parallel to each other in the conveying groove. The limiting component includes a limiting plate, a limiting stop bar, and a positioning pin. The two limiting plates are symmetrically fixed on the track plate to form a conveying channel for the lead frame with the conveying groove. The limiting stop bar is connected to a limiting cylinder and is arranged at the track outlet. The positioning pin is located in front of the limiting stop bar, and the lead frame has a through hole that matches the positioning pin. The positioning pin is connected to the cylinder. The tilting component is located between the track plate and the base, causing the track plate to tilt at a preset angle. The glue spraying mechanism is located above the limiting plate. The lead frame feeding mechanism pushes the lead frame out of the material box and conveys it to the feeding end conveying mechanism. The output mechanism conveys the lead frame from the glue spraying track mechanism back into the material box.

2. The apparatus for sealing the edges of the silver paste of the laminated aluminum electrolytic capacitor core according to claim 1, wherein: The material box has multiple slots for receiving lead frames arranged side by side.

3. The apparatus for sealing the edge of a multilayer aluminum electrolytic capacitor core with silver paste according to claim 1, characterized in that: The tilting assembly includes a gear and a rack meshing with the gear. The gear is fixedly connected to the track plate, and the rack is mounted on the base via a slide rail. The rack is connected to a cylinder.

4. The apparatus for sealing the edge of a multilayer aluminum electrolytic capacitor core with silver paste according to claim 1, characterized in that: The glue spraying mechanism includes a piezoelectric jet valve and a glue spraying XYZ three-axis module. The glue spraying XYZ three-axis module is equipped with one or more piezoelectric jet valves. The nozzle of the piezoelectric jet valve is directly facing the sealing edge of the core on the lead frame.

5. The apparatus for sealing the edge of a multilayer aluminum electrolytic capacitor core with silver paste according to claim 1, characterized in that: The lead frame feeding mechanism includes a feeding push rod, a pushing module, and a material box moving module. The feeding push rod is connected to the pushing module and faces the feeding port of the material box. The pushing module includes a pushing slide rail and a pushing slide base, with the pushing slide base mounted on the pushing slide rail. The feeding push rod is connected to the pushing slide base. The material box is mounted on the material box moving module.

6. The apparatus for sealing the edge of a multilayer aluminum electrolytic capacitor core with silver paste according to claim 1, characterized in that: The feeding end conveying mechanism includes a first conveying base and a first conveying wheel set. The first conveying base is provided with a feeding trough. The first conveying wheel set includes a first driving wheel and a first driven wheel. The first driving wheel and the first driven wheel are respectively disposed on the first conveying base. The first driving wheel and the first driven wheel are disposed opposite to each other, and the side of the lead frame is clamped and pushed through by the first driving wheel and the first driven wheel.

7. The apparatus for sealing the edge of a multilayer aluminum electrolytic capacitor core with silver paste according to claim 6, characterized in that: The first transmission base is connected to a rotating shaft, which is connected to a rotary motor. The rotating shaft and the transmission base are connected by a connecting block. The center of the transmission shaft is on the same horizontal plane as the lead frame between the drive wheel and the driven wheel.

8. The apparatus for sealing the edge of a multilayer aluminum electrolytic capacitor core with silver paste according to claim 1, characterized in that: The output mechanism includes a feeding end conveying mechanism and a material box moving module; the feeding end conveying mechanism includes a second conveying base, a second conveying wheel group, and a feeding push rod assembly, with a feeding groove provided on the second conveying base; the second conveying wheel group includes a second driving wheel and a second driven wheel, which are respectively disposed on the second conveying base; the second driving wheel and the second driven wheel are arranged opposite to each other, and the lead frame passes between the second driving wheel and the second driven wheel; the feeding push rod assembly includes a feeding push rod, a feeding lifting cylinder, and a feeding cylinder, with the feeding push rod connected to the feeding lifting cylinder, and the feeding lifting cylinder connected to the feeding cylinder; the outlet end of the feeding groove is directly opposite the inlet of the material box, and the feeding push rod pushes the lead frame on the feeding groove into the material box; the material box is disposed on the material box moving module.

9. The apparatus for sealing the edge of a multilayer aluminum electrolytic capacitor core with silver paste according to claim 5 or 8, characterized in that: The material box moving module includes a material box Y-axis module and a material box lifting device; the material box is mounted on the material box Y-axis module, and the material box Y-axis module is mounted on the material box lifting device.

10. A method for sealing the edges of a multilayer aluminum electrolytic capacitor core with silver paste, characterized in that: The apparatus for sealing the edge of a multilayer aluminum electrolytic capacitor core with silver paste according to any one of claims 1-9 includes the following steps: 1) The lead frame feeding mechanism pushes the lead frame out of the material box and into the feeding end conveyor mechanism; 2) The feeding end conveyor conveys the lead frame to the glue spraying track mechanism. After the glue spraying track mechanism tilts, the lead frame is conveyed to the position of the glue spraying mechanism under the action of the drive belt of the glue spraying track mechanism. 3) The adhesive spraying mechanism sprays silver paste onto the bottom edge of the negative terminal of the core on the lead frame; 4) The output mechanism pushes the lead frame processed in step 3) into the material box.

11. The method for sealing the edges of a multilayer aluminum electrolytic capacitor core with silver paste according to claim 10, characterized in that: In step 3), after the glue spraying mechanism sprays silver paste onto the core on one side of the lead frame, it returns to the loading end conveyor mechanism via the drive belt of the glue spraying track mechanism. After the lead frame is rotated 180°, the loading end conveyor mechanism transfers the lead frame to the glue spraying track mechanism for the second time. Under the action of the drive belt of the glue spraying track mechanism, the lead frame is transferred to the position of the glue spraying mechanism for the second time, and silver paste is sprayed onto the bottom edge of the negative end of the core on the other side of the lead frame.

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