A metallized film capacitor core end spraying system

Abstract

A kind of metallized film capacitor core end head gold spraying system, belong to capacitor manufacturing technical field, system includes: a pair of interval arrangement and synchronous rotation annular conveyor, annular conveyor all have horizontally arranged upper conveying section and lower conveying section;Clamping assembly, between two annular conveyors, clamping assembly is along the track array of annular conveyor and is provided with multiple places;Upper nozzle and upper drying device, all are located above upper conveying section, in the conveying direction of annular conveyor, upper nozzle is located behind upper drying device;Lower nozzle and lower drying device, all are located above lower conveying section, in the conveying direction of annular conveyor, lower nozzle is located behind lower drying device;Upper nozzle and lower nozzle are used to the end face of core upwards gold spraying processing, upper drying device and lower drying device are used to dry the substance of core end face gold spraying.This scheme can effectively reduce the auxiliary work of gold spraying processing, simplify process and save cost, and can improve the quality of gold spraying.

Description

Technical Field

[0001] This invention belongs to the field of capacitor manufacturing technology, and particularly relates to a gold spraying system for the ends of metallized thin-film capacitor cores. Background Technology

[0002] In related technologies, capacitor end-face gold spraying devices often involve manually assembling multiple cylindrical capacitors into a frame and then spraying gold. However, because the capacitors are cylindrical, there are many gaps between them when they are arranged. Since the gold spraying process usually involves spraying the entire surface, the material sprayed into the gaps is wasted. Furthermore, using existing methods for gold spraying requires attaching a diaphragm to the outer wall of the capacitor core before gold spraying and manually removing the diaphragm during the gold spraying process, making the entire process quite cumbersome. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a gold spraying system for the ends of metallized film capacitor cores, which can effectively reduce auxiliary work in the gold spraying process, simplify the process and save costs, and improve the quality of the gold spraying.

[0004] In order to achieve the objective of this invention, the following solution is proposed:

[0005] A gold plating system for the ends of metallized film capacitor cores, comprising:

[0006] A pair of intermittently arranged and synchronously rotating annular conveyor belts, each annular conveyor belt having a horizontally arranged upper conveying section and a lower conveying section;

[0007] The clamping assembly is located between two circular conveyor belts and is used to clamp the core. Multiple clamping assemblies are arranged along the track of the circular conveyor belt. When the clamping assembly is in the upper or lower conveyor section, the end face of the clamped core is vertically upward.

[0008] The upper nozzle and the upper drying device are both located above the upper conveying section. In the conveying direction of the circular conveyor belt, the upper nozzle is located behind the upper drying device.

[0009] The lower nozzle and the lower drying device are both located above the lower conveyor section. In the conveying direction of the circular conveyor belt, the lower nozzle is located behind the lower drying device.

[0010] The upper and lower nozzles are used to spray gold onto the upward-facing end face of the core, while the upper and lower drying devices are used to dry the gold-sprayed material on the end face of the core.

[0011] The beneficial effects of this invention are as follows:

[0012] 1. This solution enables automatic loading and unloading, and uses upper and lower nozzles to perform gold spraying on the two parts of the core respectively, avoiding material waste, reducing the disassembly and assembly work of the core outer wall diaphragm, and improving gold spraying efficiency.

[0013] 2. During the gold spraying process, the end face of the core is set upwards, which helps the gold spraying material to enter the gap between the positive and negative electrode metal films and improves the connection strength between the gold spraying layer and the end face of the core. Attached Figure Description

[0014] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of the invention.

[0015] Figure 1 A schematic diagram of the structure of this application is shown.

[0016] Figure 2 A schematic diagram of the preferred embodiment of this application is shown.

[0017] Figure 3 A cross-sectional view of a preferred embodiment of this application is shown.

[0018] Figure 4 It shows Figure 3 A magnified view of a portion of point A in the middle.

[0019] Figure 5 A schematic diagram of a preferred structure of the clamping assembly is shown.

[0020] The markings in the diagram are: Circular conveyor belt-1, upper conveyor section-11, lower conveyor section-12, guide bar-13, support plate-14, feed pipe-15, chassis-16, discharge pipe-17, clamping assembly-2, clamping plate-21, support spring-22, ball bearing-23, upper nozzle-31, lower nozzle-32, overflow cover-33, retaining ring-34, upper drying device-41, lower drying device-42. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention will be described in detail below with reference to the accompanying drawings. However, the embodiments described in this invention are only some embodiments of the present invention, and not all embodiments.

[0022] like Figures 1 to 3 As shown, a metallized film capacitor core end gold spraying system includes: an annular conveyor belt 1, a clamping assembly 2, an upper nozzle 31, an upper drying device 41, a lower nozzle 32, and a lower drying device 42.

[0023] A pair of circular conveyor belts 1 are arranged at intervals and rotate synchronously. Each circular conveyor belt 1 has a horizontally arranged upper conveying section 11 and a lower conveying section 12. The circular conveyor belt 1 is a chain-type structure or a belt-type structure.

[0024] The clamping assembly 2 is located between two circular conveyor belts 1 and is used to clamp the core. The clamping assembly 2 is arranged in multiple positions along the track of the circular conveyor belt 1. When the clamping assembly 2 is in the upper conveyor section 11 or the lower conveyor section 12, the end face of the clamped core is vertically upward.

[0025] The upper nozzle 31 and the upper drying device 41 are both located above the upper conveying section 11. In the conveying direction of the annular conveyor belt 1, the upper nozzle 31 is located behind the upper drying device 41.

[0026] The lower nozzle 32 and the lower drying device 42 are both located above the lower conveying section 12. In the conveying direction of the annular conveyor belt 1, the lower nozzle 32 is located behind the lower drying device 42.

[0027] The upper nozzle 31 and the lower nozzle 32 are used to spray gold onto the upward-facing end face of the core, and the upper drying device 41 and the lower drying device 42 are used to dry the gold-sprayed material on the end face of the core.

[0028] The working principle of the above scheme is as follows: The core is clamped onto the clamping assembly 2 behind the upper nozzle 31, with one end of the core facing upwards. Two circular conveyor belts 1 drive the clamping assembly 2 and the core to move. When the core moves below the upper nozzle 31, the upper nozzle 31 performs gold spraying only on the upward-facing end face of the core. After gold spraying, the two circular conveyor belts 1 drive the core to below the upper drying device 41, where the upper drying device 41 dries the gold-sprayed material, fixing it to the end face of the core. The two circular conveyor belts 1 then drive the core to continue... As the core continues to move from the upper conveyor section 11 to the lower conveyor section 12, the upper and lower ends of the core will be reversed because the annular conveyor belt 1 has an annular structure. At this time, the end of the core that has been gold-plated will face down, while the other end of the core will face up. When the core moves to below the lower nozzle 32, the lower nozzle 32 is used to gold-plat the upward-facing end of the core. After the gold plating is completed, the core will move to below the lower drying device 42 under the drive of the annular conveyor belt 1 to dry the gold-plated material. At this point, both ends of the core have completed the gold plating and drying processes.

[0029] This method uses the upper nozzle 31 and the lower nozzle 32 to perform gold spraying on the two end faces of the core one by one, which can more accurately control the gold spraying range and avoid the gold spraying material adhering to the outer wall of the core. Therefore, there is no need to stick a diaphragm on the outside of the core before the gold spraying process, which not only reduces the amount of work, but also avoids material waste.

[0030] In this solution, the end face of the coil core is always facing upwards after gold spraying and before the gold spraying material cures. Existing gold spraying equipment typically places the coil core flat during the process, with both end faces vertical. After spraying, the gold spraying material automatically drips down the end faces, forming bumps on the end faces and edges, affecting the flatness of the end faces and hindering the stacking and assembly of the coil cores. Furthermore, the dripping of gold spraying material can cause localized material reduction on the end faces, affecting wire performance and ultimately product quality. This solution effectively prevents these problems. Moreover, by using an upward-facing end face for both gold spraying and drying, the gold spraying material can better penetrate the gap between the positive and negative electrode metal films on the end faces of the coil core, increasing the connection area between the gold spraying material and both the positive and negative electrode metal films, ensuring conductivity, improving connection strength, and enhancing the coil core's shock resistance during use.

[0031] Preferred, such as Figure 1 , Figure 2 As shown, the annular conveyor belt 1 is a conveyor chain structure. Both ends of the annular conveyor belt 1 are equipped with sprockets, and the sprockets at the same end of the two annular conveyor belts 1 are coaxially mounted on the same drive shaft to ensure that the two annular conveyor belts 1 move synchronously. The conveyor chain structure can also prevent the annular conveyor belt 1 from slipping.

[0032] Preferred, such as Figure 5 As shown, the clamping assembly 2 includes a rectangular frame, with the midpoints of both ends of the rectangular frame connected to the two annular conveyor belts 1 on both sides. A pair of clamping plates 21 are provided on the rectangular frame, with their ends slidably mounted on the rods on both sides of the rectangular frame. A semi-circular groove is provided on the opposite side of the clamping plate 21 for connecting the core. Specifically, a compression spring can be provided between the outer side of the clamping plate 21 and the end face of the rectangular frame. The pressure generated by the compression spring on the clamping plate 21 is used to press the core. The clamping process of the core can be operated manually.

[0033] Preferred, such as Figures 1 to 3 and Figure 5As shown, a support spring 22 is provided between the two clamping plates 21. The support spring 22 is in a compressed state, so the support spring 22 can drive the two clamping plates 21 to open towards both ends of the rectangular frame to facilitate the insertion and automatic release of the core. Guide strips 13 are provided on the inner and outer sides of the two annular conveyor belts 1, and the trajectory of the guide strips 13 is consistent with the trajectory of the annular conveyor belts 1. It can also be understood that the distance between each guide strip 13 and the corresponding annular conveyor belt 1 is the same. The upper nozzle 31, the lower nozzle 32, the upper drying device 41 and the lower drying device 42 are all located within the length range of the guide strips 13. When the clamping assembly 2 moves into the range of the guide strips 13, the outer wall of the clamping plate 21 abuts against the guide strips 13, and the two clamping plates 21 retract towards the middle to clamp the core. During operation, before the clamping assembly 2 enters between the guide bars 13 on both sides, the core is placed between the two clamping plates 21. After the clamping assembly 2 enters the guide bars 13, the guide bars 13 will press the clamping plates 21 towards the middle, causing the two clamping plates 21 to close together, thereby clamping and fixing the core. During the gold spraying and drying process at both ends of the core, the clamping assembly is always within the range of the guide bars 13 to maintain the clamping state of the core. When the clamping assembly 2 moves out from the end of the guide bar 13 corresponding to the lower conveyor section 12, under the elastic force of the support spring 22, the two clamping plates 21 will automatically open outward, thereby automatically releasing the core that has completed the gold spraying process. The purpose of setting guide bars 13 on both the inner and outer sides of the circular conveyor belt 1 is to ensure that the upper and lower ends of the clamping plates 21 receive equal clamping force, so as to ensure that the inner wall of the clamping plates 21 fits the core as a whole and improves the clamping stability.

[0034] Further preferred, such as Figure 1 As shown, the inner side of the end of the guide bar 13 corresponding to the upper conveying section 11 has a bevel structure, which is used to guide the clamping plate 21 into the space between the guide bars 13 on both sides. In this way, the clamping plate 21 can be automatically guided into the space between the guide bars 13 on both sides during the movement of the annular conveyor belt 1, so as to achieve the purpose of automatically clamping the core.

[0035] Preferred, such as Figure 1 , Figure 3As shown, a support plate 14 is provided below the upper conveying section 11. In the conveying direction of the annular conveyor belt 1, the support plate 14 is located behind the upper nozzle 31, and one end of the support plate 14 extends to the bottom of the guide bar 13. When placing the core between the two clamping plates 21, the lower end face of the core is supported on the support plate 14. With the above structural design, the position of the support plate 14 can be positioned as the feeding station. After the core is placed between the two clamping plates 21 at the position of the support plate 14, the core can be moved along the support plate 14 to the guide bar 13 under the drive of the annular conveyor belt 1. The core is separated from the support plate 14 only after the two clamping plates 21 enter the range of the guide bar 13, which can effectively prevent the core from falling. This method is also convenient for automatic feeding.

[0036] More preferably, a vertically arranged feed pipe 15 is provided above the support plate 14 for feeding the core into the clamping assembly 2.

[0037] Preferred, such as Figure 4 As shown, both the upper nozzle 31 and the lower nozzle 32 are equipped with overflow shields 33 on their outer sides at the lower ends. The inner diameter of these shields is larger than that of the core, and they are used to gather the sprayed gold material and prevent it from scattering. Specifically, both the upper nozzle 31 and the lower nozzle 32 are vertically movable. Furthermore, both the upper nozzle 31 and the lower nozzle 32 are equipped with telescopic devices to control their movement. These telescopic devices are either cylinders or linear motors.

[0038] Further preferred, such as Figure 4 As shown, each of the anti-overflow covers 33 is equipped with a retaining ring 34. An annular groove is formed between the top surface of the retaining ring 34 and the top surface of the anti-overflow cover 33. During gold spraying, the top surface of the retaining ring 34 is lower than the top of the core. The inner diameter of the retaining ring 34 matches the outer diameter of the core. This structural design allows the material scattered around during gold spraying to enter the annular groove, preventing the material from adhering to the outer wall of the core. At the same time, it can prevent the material from adhering to the inner wall of the retaining ring 34, which would affect the smoothness of the connection between the retaining ring 34 and the core in subsequent work.

[0039] As a preferred option, a chamfered structure can be provided at the lower end of the inner wall of the retaining ring 34 to facilitate the insertion of the core into the retaining ring 34.

[0040] Preferred, such as Figure 5 As shown, the outer wall of the clamping plate 21 is provided with ball bearings 23 that roll in contact with the guide bar 13, which are used to reduce the friction between the clamping plate 21 and the guide bar 13, so that the guide bar 13 can push the clamping plate 21 to close in the middle more smoothly.

[0041] Preferred, such as Figure 2 , Figure 3 As shown, the annular conveyor belt 1 is located inside a housing 16, and a discharge pipe 17 is provided at the bottom of the housing 16 corresponding to the position where the clamping assembly 2 releases the core.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to be the only or limiting of the invention. Those skilled in the art should understand that various changes or equivalent substitutions made to the present invention without departing from its scope are all within the protection scope of the present invention.

Claims

1. A gold-plating system for the ends of metallized thin-film capacitor cores, characterized in that, include: A pair of intermittently arranged and synchronously rotating annular conveyor belts (1), each annular conveyor belt (1) having a horizontally arranged upper conveying section (11) and a lower conveying section (12). The clamping assembly (2) is located between two circular conveyor belts (1) and is used to clamp the core. The clamping assembly (2) is arranged in multiple positions along the track of the circular conveyor belt (1). When the clamping assembly (2) is in the upper conveyor section (11) or the lower conveyor section (12), the end face of the clamped core is vertically upward. The upper nozzle (31) and the upper drying device (41) are both located above the upper conveying section (11). In the conveying direction of the annular conveyor belt (1), the upper nozzle (31) is located behind the upper drying device (41). The lower nozzle (32) and the lower drying device (42) are both located above the lower conveying section (12). In the conveying direction of the annular conveyor belt (1), the lower nozzle (32) is located behind the lower drying device (42). The upper nozzle (31) and the lower nozzle (32) are both moved vertically. The upper nozzle (31) and the lower nozzle (32) are used to spray gold on the upper end face of the core. The upper drying device (41) and the lower drying device (42) are used to dry the gold sprayed material on the end face of the core.

2. The gold sputtering system for the end of a metallized thin-film capacitor core according to claim 1, characterized in that, The annular conveyor belt (1) is a conveyor chain structure. Both ends of the annular conveyor belt (1) are equipped with sprockets, and the sprockets at the same end of the two annular conveyor belts (1) are coaxially mounted on the same drive shaft.

3. The gold sputtering system for the end of a metallized thin-film capacitor core according to claim 1, characterized in that, The clamping assembly (2) includes a rectangular frame, with both ends of the rectangular frame connected to the two sides of the annular conveyor belt (1). A pair of clamping plates (21) are provided on the rectangular frame, with both ends of the plates sliding on the rods on both sides of the rectangular frame. A semi-circular groove is provided on the opposite side of the clamping plate (21) for connecting the core.

4. The gold sputtering system for the end of a metallized thin-film capacitor core according to claim 3, characterized in that, A support spring (22) is provided between the two clamping plates (21). The support spring (22) is in a compressed state. Guide strips (13) are provided on the inner and outer sides of the two circular conveyor belts (1). The trajectory of the guide strips (13) is consistent with the trajectory of the circular conveyor belts (1). The upper nozzle (31), lower nozzle (32), upper drying device (41) and lower drying device (42) are all located within the length range of the guide strips (13). When the clamping assembly (2) moves into the range of the guide strips (13), the outer wall of the clamping plate (21) abuts against the guide strips (13), and the two clamping plates (21) converge towards the middle to clamp the core.

5. The gold sputtering system for the end of a metallized thin-film capacitor core according to claim 4, characterized in that, The inner side of the end of the guide bar (13) corresponding to the upper conveying section (11) has a bevel structure for guiding the clamping plate (21) into the space between the guide bars (13) on both sides.

6. The gold sputtering system for the end of a metallized thin-film capacitor core according to claim 4, characterized in that, A support plate (14) is provided below the upper conveying section (11). In the conveying direction of the annular conveyor belt (1), the support plate (14) is located behind the upper nozzle (31), and one end of the support plate (14) extends to the bottom of the guide bar (13). When the core is placed between the two clamping plates (21), the lower end face of the core is supported on the support plate (14).

7. The gold sputtering system for the end of a metallized thin-film capacitor core according to claim 1, characterized in that, Both the upper nozzle (31) and the lower nozzle (32) are provided with overflow shields (33) on the outer side of their lower ends. The inner diameter of the shields is larger than that of the core, which are used to gather the sprayed gold material and prevent the gold material from scattering.

8. The gold sputtering system for the end of a metallized thin-film capacitor core according to claim 7, characterized in that, Each anti-overflow cover (33) is equipped with a retaining ring (34). An annular groove is formed between the top surface of the retaining ring (34) and the top surface of the anti-overflow cover (33). When gold is sprayed, the top surface of the retaining ring (34) is lower than the top of the core. The inner diameter of the retaining ring (34) matches the outer diameter of the core.

9. A gold sputtering system for the end of a metallized thin-film capacitor core according to claim 7, characterized in that, The outer wall of the clamping plate (21) is provided with balls (23) that roll in contact with the guide strip (13).

10. A gold sputtering system for the end of a metallized thin-film capacitor core according to claim 1, characterized in that, The circular conveyor belt (1) is located inside a housing (16), and the bottom of the housing (16) is provided with a discharge pipe (17) corresponding to the position where the clamping assembly (2) releases the core.

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