A rubber and plastic hot melt composite capacitor cover plate and its processing method

Abstract

The present invention relates to the technical field of capacitor packaging, and discloses a rubber-plastic hot-melt composite capacitor cover plate and a processing method thereof, including an insulating rubber body. A fixing disc is provided on the upper side of the insulating rubber body. A rubber-coated disc is arranged between the insulating rubber body and the fixing disc. Uniformly distributed connecting holes are formed inside the rubber-coated disc. An annular wall groove is formed on the outer edge of the rubber-coated disc and close to one side of the fixing disc. A support ring is integrally formed on the side of the rubber-coated disc. An extension ring convex is integrally formed on the side of the support ring close to the fixing disc. By providing the insulating rubber body, the fixing disc and the rubber-coated disc, compared with the traditional capacitor cover plate only having an insulating rubber body and a nylon plate, the strength of this capacitor cover plate is higher. The fixing disc is cut before preparation, avoiding the internal cracking of the nylon plate caused by cutting the traditional capacitor cover plate after it is made, thus ensuring the quality of the capacitor cover plate.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitor packaging, and specifically relates to a rubber-plastic hot-melt composite capacitor cover plate and a processing method thereof. Background Technique

[0002] Hot melting is generally used for hot-melt connection. The principle of hot-melt connection is a physical process. After heating the material for a certain time, the originally closely arranged molecular chains of the material are separated. Then, under the action of a stable pressure, two components are connected and fixed, and a seam pressure is established in the fusion zone. Due to the action of the seam pressure, the molecular chains are re-linked as the temperature drops, so that the two components are closed into a whole.

[0003] The capacitor packaging cover plate is produced by a vulcanization process. The capacitor packaging cover plate has strict indicators for sealing performance, conductivity, insulation performance, high and low temperatures, and resistance to various acids, alkalis, and halogen ion concentrations such as chloride ions. The common capacitor packaging cover plate is to directly vulcanize a nylon plate and a rubber layer first, and then cut according to the size of the capacitor itself. During the cutting process, the nylon plate is prone to cracking, which affects the sealing performance of the capacitor packaging cover plate.

[0004] Therefore, those skilled in the art have provided a rubber-plastic hot-melt composite capacitor cover plate and a processing method thereof to solve the problems raised in the above background technique. Summary of the Invention

[0005] The purpose of the present invention is to provide a rubber-plastic hot-melt composite capacitor cover plate and a processing method thereof to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A rubber-plastic hot-melt composite capacitor cover plate includes an insulating rubber body. A fixed disc is provided on the upper side of the insulating rubber body. A rubber-coated disc is arranged between the insulating rubber body and the fixed disc. A welding needle installation hole is penetrated through the insulating rubber body, the rubber-coated disc, and the fixed disc. A conductive welding needle is installed inside the welding needle installation hole. A uniformly distributed connection hole is opened inside the rubber-coated disc. An annular wall groove is opened on the outer edge of the rubber-coated disc and close to the side of the fixed disc. A support ring is integrally formed on the side of the rubber-coated disc. An extension ring convex is integrally formed on the side of the support ring close to the fixed disc.

[0008] As a further solution of the present invention: The side of the support ring close to the insulating rubber body is flush with the side of the rubber-coated disc close to the insulating rubber body. The side of the extension ring convex close to the fixed disc is flush with the concave surface where the annular wall groove is located.

[0009] As a further solution of the present invention: the connecting hole includes an expansion hole portion and a straight hole portion, the expansion hole portion is close to one side of the fixed disc, and the straight hole portion is close to one side of the insulating rubber body. The diameter of the expansion hole portion is larger than that of the straight hole portion, and the interiors of the expansion hole portion and the straight hole portion are both filled with a vulcanized insulating rubber body.

[0010] As a further solution of the present invention, the outer edge of the insulating rubber body covers the surfaces of the extension ring protrusion and the support ring, and the edge of the insulating rubber body extends to the interior of the extension ring protrusion.

[0011] As a further solution of the present invention, the outer edge of the insulating rubber body is flush with the outer edge of the fixed disc.

[0012] A method for processing a rubber-plastic hot-vulcanized composite capacitor cover comprises the following steps:

[0013] S1. Preparation of raw materials: rubber material, iron horn connector parts, injection-molded plastic plates, and nylon plates are prepared according to the insulating rubber body, conductive welding pins, fixed discs, and rubber-coated discs;

[0014] S2. Cut the nylon plate according to the size specifications to obtain a fixed disc that meets the size specifications;

[0015] S3. Selecting rubber materials and using insulating rubber raw materials with low chloride ion concentration, and mixing the raw materials into synthetic rubber through a mixing process;

[0016] S4. Select an injection-molded plastic plate and use an injection molding machine to obtain a rubber-coated disc. Then, coat the surface of the rubber-coated disc with synthetic rubber. Then, fix the fixed disc and the rubber-coated disc with a fixing fixture and fix them by hot-melt welding.

[0017] S5, punching the hot-melt composite assembly with a laser punching machine to obtain welding pin mounting holes;

[0018] S6. Use a robot to install the conductive soldering pin into the soldering pin installation hole.

[0019] As a further solution of the present invention: in step S4, the hot melt welding is performed using an ultrasonic welding machine.

[0020] As a further solution of the present invention: in step S6, the conductive soldering pin is riveted inside the soldering pin mounting hole.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] By setting an insulating rubber body, a fixing disc and a rubber-coated disc, compared with the traditional capacitor cover plate that only has an insulating rubber body and a nylon plate, the strength of this capacitor cover plate is higher. The fixing disc is cut before preparation to avoid the internal cracking of the nylon plate caused by cutting the traditional capacitor cover plate after it is made, thus ensuring the quality of the capacitor cover plate. The rubber-coated disc is obtained by an injection molding process. A connecting hole is integrally formed inside the rubber-coated disc. Then, by covering the insulating rubber body on the surface of the rubber-coated disc, the insulating rubber body will penetrate into the connecting hole, and a blocking effect can be formed on the insulating rubber body through the expansion hole part to prevent the insulating rubber body from separating from the rubber-coated disc. An annular wall groove is provided at the edge of the rubber-coated disc, so that the insulating rubber body can be clamped into the annular wall groove to protect the edge of the rubber-coated disc. At the same time, compared with the traditional capacitor cover plate whose edge is not coated, it can also enhance the insulation of the edge of the capacitor cover plate. The insulating rubber body, the rubber-coated disc and the fixing disc are connected together by hot melt welding. The insulating rubber body passing through the expansion hole part and clamped into the annular wall groove will contact the fixing disc, thereby enhancing the connection between the three and reducing the possibility of cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a rubber and plastic hot melt composite capacitor cover plate;

[0024] Figure 2 is a top view of a rubber and plastic hot melt composite capacitor cover plate;

[0025] Figure 3 is Figure 2 a schematic structural diagram in the A-A direction of

[0026] Figure 4 and with the conductive welding pins omitted;

[0027] Figure 5 is Figure 4 a schematic structural diagram in the B-B direction of

[0028] In the figure: 1, insulating rubber body; 2, conductive welding pin; 3, fixing disc; 4, welding pin mounting hole; 5, rubber-coated disc; 51, annular wall groove; 52, extending ring convex; 53, support ring; 6, connecting hole; 61, expansion hole part; 62, straight hole part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Please refer to Figures 1 to 5 , in the embodiment of the present invention, a processing method for a rubber and plastic heat vulcanization composite capacitor cover plate includes the following steps:

[0030] S1. Preparation of raw materials. According to the insulating rubber body 1, conductive welding needles 2, fixed discs 3 and rubber-coated discs 5, prepare rubber materials, iron horn joint components, injection-molded plastic plates and nylon plates respectively;

[0031] S2. Cut the nylon plate according to the size specifications to obtain the fixed disc 3 that meets the size specifications;

[0032] S3. Select rubber materials and use rubber body raw materials with low chloride ion concentration for insulation. After the mixing process, mix the raw materials into synthetic rubber;

[0033] S4. Select an injection-molded plastic plate, use an injection molding machine to inject and obtain the rubber-coated disc 5, and coat the surface of the rubber-coated disc 5 with synthetic rubber. Then fix the fixed disc 3 and the rubber-coated disc 5 with a fixed fixture and fix them by hot melt welding;

[0034] S5. Punch the assembled parts after hot melt compounding with a laser drilling machine to obtain the welding needle installation holes 4;

[0035] S6. Use a manipulator to install the conductive welding needles 2 into the welding needle installation holes 4.

[0036] Preferably, in step S4, ultrasonic welding machine is used for hot melt welding.

[0037] Preferably, in step S6, the conductive welding needles 2 are riveted inside the welding needle installation holes 4 of a kind of rubber-plastic hot melt composite capacitor cover plate.

[0038] A kind of rubber-plastic hot melt composite capacitor cover plate obtained according to the processing method of the above-mentioned rubber-plastic hot melt composite capacitor cover plate, including an insulating rubber body 1. A fixed disc 3 is provided on the upper side of the insulating rubber body 1. A rubber-coated disc 5 is arranged between the insulating rubber body 1 and the fixed disc 3. Welding needle installation holes 4 are penetrated and opened inside the insulating rubber body 1, the rubber-coated disc 5 and the fixed disc 3. Conductive welding needles 2 are installed inside the welding needle installation holes 4. Connecting holes 6 are evenly distributed and opened inside the rubber-coated disc 5. An annular wall groove 51 is opened on the outer side edge of the rubber-coated disc 5 and close to one side of the fixed disc 3. A support ring 53 is integrally formed on the side of the rubber-coated disc 5. An extension ring convex 52 is integrally formed on the side of the support ring 53 close to the fixed disc 3.

[0039] Preferably, the side of the support ring 53 close to the insulating rubber body 1 is flush with the side of the rubber-coated disc 5 close to the insulating rubber body 1, and the side of the extension ring convex 52 close to the fixed disc 3 is flush with the concave surface where the annular wall groove 51 is located.

[0040] Preferably, the connecting hole 6 includes a flared hole portion 61 and a straight hole portion 62. The flared hole portion 61 is on the side close to the fixed disc 3, and the straight hole portion 62 is on the side close to the insulating rubber body 1. The diameter of the flared hole portion 61 is larger than that of the straight hole portion 62. The interiors of both the flared hole portion 61 and the straight hole portion 62 are filled with the insulating rubber body 1 after vulcanization treatment.

[0041] Preferably, the outer edge of the insulating rubber body 1 covers the surfaces of the extension ring protrusion 52 and the support ring 53, and the edge of the insulating rubber body 1 extends into the interior of the extension ring protrusion 52.

[0042] Preferably, the outer edge of the insulating rubber body 1 is flush with the outer edge of the fixed disc 3.

[0043] The working principle of the present invention is as follows: The nylon plate is cut according to the size specifications of actual production to obtain a fixed disc 3 that meets the size specifications. A rubber-coated disc 5 is obtained by injection molding using an injection molding machine. Then, the synthetic rubber obtained through the mixing process is coated on the surface of the rubber-coated disc 5. Next, the fixed disc 3 and the rubber-coated disc 5 are fixed by a fixed fixture, and a hot melt composite assembly is obtained by hot melt welding using an ultrasonic welding machine. Then, the assembly is subjected to a punching process using a laser drilling machine to obtain a welding needle mounting hole 4, and a conductive welding needle 2 is installed into the welding needle mounting hole 4 using a manipulator, thereby completing the overall processing process of the composite capacitor cover plate.

[0044] The above-mentioned are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A rubber-plastic hot-melt composite capacitor cover plate, comprising an insulating rubber body (1), characterized in that: On the upper side of the insulating rubber body (1), there is a fixed circular plate (3). Between the insulating rubber body (1) and the fixed circular plate (3), there is a rubber-coated circular plate (5). Inside the insulating rubber body (1), the rubber-coated circular plate (5), and the fixed circular plate (3), there is a through-opening welding needle installation hole (4). Inside the welding needle installation hole (4), there is a conductive welding needle (2). Inside the rubber-coated circular plate (5), there are evenly distributed connection holes (6). On the outer edge of the rubber-coated circular plate (5) and on the side close to the fixed circular plate (3), there is an annular wall groove (51). On the side of the rubber-coated circular plate (5), there is an integrally formed support ring (53). On the side of the support ring (53) close to the fixed circular plate (3), there is an integrally formed extending ring convex (52); the side of the support ring (53) close to the insulating rubber body (1) is flush with the side of the rubber-coated circular plate (5) on the side close to the insulating rubber body (1), and the side of the extending ring convex (52) on the side close to the fixed circular plate (3) is flush with the concave surface where the annular wall groove (51) is located; the connection hole (6) includes an expansion hole part (61) and a straight hole part (62). The expansion hole part (61) is on the side close to the fixed circular plate (3), and the straight hole part (62) is on the side close to the insulating rubber body (1). The diameter of the expansion hole part (61) is larger than that of the straight hole part (62). Inside both the expansion hole part (61) and the straight hole part (62), there is filled with the insulating rubber body (1) after vulcanization treatment.

2. The rubber-plastic hot-melt composite capacitor cover plate according to claim 1, characterized in that: The outer edge of the insulating rubber body (1) is wrapped around the surfaces of the extending ring convex (52) and the support ring (53), and the edge of the insulating rubber body (1) extends into the inside of the extending ring convex (52).

3. The rubber-plastic hot-melt composite capacitor cover plate according to claim 2, characterized in that: The outer edge of the insulating rubber body (1) is flush with the outer edge of the fixed circular plate (3).

4. A processing method of a rubber and plastic hot melt composite capacitor cover plate according to any one of claims 1 to 3, characterized in that, It includes the following steps: S1. Preparation of raw materials: According to the insulating rubber body (1), the conductive welding needle (2), the fixed circular plate (3), and the rubber-coated circular plate (5), respectively prepare rubber materials, iron horn joint components, injection molding plastic plates, and nylon plates. S2. Cut the nylon plate according to the size specifications to obtain a fixed circular plate (3) that meets the size specifications. S3. Select rubber materials and use rubber body raw materials with low chloride ion concentration for insulation. Through the mixing process, mix the raw materials into synthetic rubber. S4. Select an injection molding plastic plate, use an injection molding machine to inject and obtain a rubber-coated circular plate (5), and coat the surface of the rubber-coated circular plate (5) with synthetic rubber. Then, fix the fixed circular plate (3) and the rubber-coated circular plate (5) with a fixed fixture and fix them by hot melt welding. S5. Perform hole punching on the hot melt composite assembly through a laser drilling machine to obtain a welding needle installation hole (4). S6. Use a manipulator to install the conductive welding needle (2) into the welding needle installation hole (4).

5. The processing method of a rubber-plastic hot melt composite capacitor cover plate according to claim 4, characterized in that: In step S4, ultrasonic welding machine is used for hot melt welding.

6. The processing method of a rubber and plastic hot melt composite capacitor cover plate according to claim 4, characterized in that: In step S6, the conductive welding needle (2) is riveted inside the welding needle installation hole (4).

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