A low-noise, low-capacitance-attenuation film capacitor and its production process

Abstract

The present invention discloses a low-noise, low-capacitance attenuation film capacitor and its production process, specifically relating to the field of film capacitors. The production process includes coating, slitting, winding, vacuum drying, gold spraying, vacuum wax dipping, centrifugation, welding, encapsulation, testing, and packaging in sequence; wherein, the centrifugation adopts a centrifugal device, the centrifugal device includes a workbench, a mounting seat is provided on the workbench, a clamping drive component is installed on the mounting seat, two groups of mounting components are installed on the clamping drive component, and the clamping drive component is used to drive the two groups of mounting components to move closer to or away from each other. The present invention adopts vacuum drying to eliminate the internal stress of the capacitor and the gap between the dielectric film layers of the film capacitor, and vacuum wax dipping is used to fill the gap inside the dielectric film layer and remove air. The wax is insoluble in water and has good moisture-proof performance. This production process can effectively reduce the noise and capacity attenuation rate of the capacitor.

Description

Technical Field

[0001] The present invention relates to the technical field of film capacitors, and more particularly to a low-noise and low-capacitance-attenuation film capacitor and a production process thereof. Background Art

[0002] Film capacitors use metal foil as electrodes and plastic films such as polyethylene, polypropylene, polystyrene, or polycarbonate as dielectrics. Film capacitors have the characteristics of non-polarity, low dielectric loss, long life, high frequency, and excellent temperature characteristics.

[0003] The manufacturing process of ordinary metallized film capacitors is generally as follows: coating, slitting, winding, pre-pressing, hot pressing, drying, gold spraying, welding, encapsulation, testing, and packaging.

[0004] There is a certain gap between the dielectric film layers of film capacitors. In some circuit applications, the voltage applied to both ends of the capacitor and the distorted frequency waveform cause the Coulomb force between the two electrodes of the capacitor to form a certain resonance, resulting in a certain roar (noise).

[0005] Since there is a certain amount of air inside the wound film capacitor core, the air cannot be completely removed during the subsequent production process. After the capacitor is packaged, the air inside the capacitor core will cause the metal electrode vapor-deposited layer of the capacitor to ionize over time, resulting in a reduction in the effective area of the metal electrode and ultimately leading to the attenuation of the capacitor capacity. Summary of the Invention

[0006] The present invention provides a low-noise and low-capacitance attenuation film capacitor and a production process thereof, and aims to solve the problem that the film capacitor generates noise and attenuates the capacitor capacity.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a process for producing low-noise and low-capacitance attenuation thin-film capacitors, the production process comprising coating, slitting, winding, vacuum drying, gold spraying, vacuum wax dipping, centrifugation, welding, encapsulation, testing, and packaging in sequence; wherein, centrifugation adopts a centrifugal device, the centrifugal device comprises a workbench, a mounting seat is provided on the workbench, a clamping drive component is installed on the mounting seat, two groups of mounting components are installed on the clamping drive component, the clamping drive component is used to drive the two groups of mounting components to move closer to or away from each other; wax delivery pipes are installed at the bottom of the two groups of mounting components, when the two mounting components approach each other, the two wax delivery pipes are used to clamp at both ends of the thin-film capacitor, the centrifugal device also comprises a wax heating circulation component, the wax heating circulation component is connected to the two wax delivery pipes, and the two wax delivery pipes are connected to the core space of the thin-film capacitor, so that the wax heating circulation component, the two wax delivery pipes, and the core space form a loop.

[0008] In a preferred embodiment, the temperature and time of vacuum drying are 85 degrees for 40 minutes, 110 degrees for 90 minutes, and 85 degrees for 40 minutes, respectively, with a vacuum degree of -0.1 MPa; and the vacuum wax dipping time is 8 to 10 hours.

[0009] In a preferred embodiment, the mounting component includes a movable seat, a cylinder is mounted on the movable seat, a mounting head is mounted on the output end of the cylinder, the cylinder is used to drive the mounting head to move vertically, and the wax delivery pipe is mounted on the mounting head.

[0010] In a preferred embodiment, the wax delivery pipe is rotatably connected to the mounting head, and a second motor is installed at the output end of the cylinder. The second motor is used to drive the wax delivery pipe to rotate. An insulation plug is connected to the front end of the wax delivery pipe. The insulation plug can move along the radial direction of the end of the wax delivery pipe to open or close the end of the wax delivery pipe.

[0011] In a preferred embodiment, the centrifugal device also includes a control component, which includes a control disk. The control disk is movably mounted on the outside of the wax delivery pipe and fixedly connected to the output end of the cylinder. The side of the control disk is provided with an inner ring channel and an outer ring channel located outside the inner ring channel. There is a connecting port between the inner ring channel and the outer ring channel, which connects the inner ring channel and the outer ring channel.

[0012] In a preferred embodiment, the middle part of the control disk is rotatably connected to an inner switching block, and the control disk is fixedly connected with an inner limit shaft 1 and an inner limit shaft 2 respectively located on both sides of the inner switching block, the inner switching block swings between the inner limit shaft 1 and the inner limit shaft 2, and the inner switching block is reset toward the direction of the inner limit shaft 1 through an elastic component 1; the edge of the control disk is rotatably connected to an outer switching block, and the control disk is fixedly connected with an outer limit shaft 1 and an outer limit shaft 2 respectively located on both sides of the outer switching block, the outer switching block swings between the outer limit shaft 1 and the outer limit shaft 2, and the outer switching block is reset toward the direction of the outer limit shaft 1 through an elastic component 2, the inner switching block and the outer switching block are respectively used to connect or disconnect the inner ring channel and the outer ring channel at the position of the connecting port, and a guide shaft is fixedly connected to the insulation plug plate, and the guide shaft slides inside the inner ring channel or the outer ring channel.

[0013] In a preferred embodiment, the upper end of the wax delivery pipe is fixedly connected to a pressure rod, and an arc-shaped pressure plate is fixedly connected to the pressure rod. A support component is installed on the workbench, and the support component includes a support seat. U-shaped plates are fixedly installed on both sides of the support seat, and both sides of the upper end of the U-shaped plate have an outward folding portion extending obliquely upward.

[0014] In a preferred embodiment, the wax heating circulation component includes a delivery pump and a heating tank respectively installed on two mounting components, the input end of the delivery pump is connected to the heating tank through pipeline three, the output end of the delivery pump is connected to one end of one of the wax delivery pipes through pipeline one, and the other wax delivery pipe is connected to the interior of the heating tank through pipeline two.

[0015] In a preferred embodiment, the clamping drive component includes a fixed frame, which is fixedly mounted on a mounting seat, on which a motor 1 is mounted, and a bidirectional screw rod is mounted on the output end of the motor 1, the threads at both ends of the bidirectional screw rod have opposite rotation directions, and the two movable seats are respectively threadedly connected to the two ends of the bidirectional screw rod.

[0016] In a preferred embodiment, a low-noise and low-capacitance film capacitor is processed using the above-mentioned production process. The film capacitor includes a dielectric film layer one, a metal foil layer one, a dielectric film layer two and a metal foil layer two in sequence. The dielectric film layer one, the metal foil layer one, the dielectric film layer two and the metal foil layer two are wound into a roll. The middle of the film capacitor has a core space, the core space is filled with wax, the metal foil layer one and the metal foil layer two are connected with metal pins, and the outside of the film capacitor is a protective layer.

[0017] The technical effects and advantages of the present invention are as follows: the present invention adopts vacuum drying treatment to eliminate the internal stress of the capacitor and the gaps between the dielectric film layers of the film capacitor, and vacuum wax impregnation is used to fill the gaps inside the dielectric film layer and exclude air. The wax is insoluble in water and has good moisture-proof performance. This production process can effectively reduce the noise and capacitance decay rate of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the local structure of the present invention Figure 1 .

[0020] Figure 3 For the present invention Figure 2 Schematic diagram of the local structure of the cross-section view.

[0021] Figure 4 It is a schematic diagram of the local structure of the present invention Figure 2 .

[0022] Figure 5 Schematic diagram of the inner switch block and inner limit shaft of the present invention Figure 1 .

[0023] Figure 6 Schematic diagram of the inner switch block and inner limit shaft of the present invention Figure 2 .

[0024] Figure 7 Schematic diagram of the inner switch block and inner limit shaft of the present invention Figure 3 .

[0025] Figure 8 It is a structural schematic diagram of the supporting component of the present invention.

[0026] Figure 9 Generate a process flow chart for the film capacitor of the present invention.

[0027] Figure 10 Schematic diagram of the structure of the film capacitor of the present invention.

[0028] The accompanying drawings are marked as follows: 1. workbench; 2. mounting base; 3. clamping drive component; 31. fixing frame; 32. motor 1; 33. bidirectional screw; 4. mounting component; 41. moving base; 42. cylinder; 43. mounting head; 5. wax delivery pipe; 6. wax heating circulation component; 61. delivery pump; 62. pipeline 1; 63. heating tank; 64. pipeline 2; 65. pipeline 3; 7. motor 2; 71. bevel gear set; 8. insulation plug plate; 81. guide shaft; 9. control component; 90. control panel; 91. inner ring; 9 2. Outer annular channel; 93. Connecting port; 94. Inner switching block; 95. Inner limit axis 1; 96. Inner limit axis 2; 97. Outer switching block; 98. Outer limit axis 1; 99. Outer limit axis 2; 100. Pressure rod; 101. Arc-shaped pressure plate; 200. Support component; 201. Support seat; 202. U-shaped plate; 203. Outer folding part; 300. Film capacitor; 301. Dielectric film layer 1; 302. Metal foil layer 1; 303. Dielectric film layer 2; 304. Metal foil layer 2; 305. Core space. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Refer to the instruction manual Figures 1-10 A low-noise and low-capacitance-loss film capacitor production process includes the following steps:

[0031] Step 1: Coating: Using vacuum evaporation technology, the metal is vaporized at high temperature and evenly adhered to the surface of the film.

[0032] Step 2: Slitting: Use a high-precision slitting machine to cut the wide coated film into the required width to match the capacitor size.

[0033] Step 3: Winding: Use an automatic winding machine to wind the dielectric film layer 1 301 , the metal foil layer 1 302 , the dielectric film layer 2 303 , and the metal foil layer 2 304 into a roll.

[0034] Step 4: Vacuum drying: Use a vacuum dryer for drying. The temperature and time for vacuum drying are 85 degrees for 40 minutes, 110 degrees for 90 minutes, and 85 degrees for 40 minutes, respectively. The vacuum degree is -0.1Mpa.

[0035] Step 5: Spraying gold: Spray molten metal on both end surfaces of the capacitor by arc or flame to form a conductive layer with a thickness of about 0.1-0.5mm, connecting the internal metal foil layer.

[0036] Step 6: Vacuum wax dipping: Use a vacuum wax dipping machine to dig wax for 8 to 10 hours.

[0037] Step 7: Centrifugation: Make the wax on the outer surface of the film capacitor 300 evenly distributed.

[0038] Step 8. Soldering: Solder the copper wire or metal terminal to the gold-sprayed end surface.

[0039] Step 9. Packaging: Place the capacitor into a plastic case and fill it with epoxy resin.

[0040] Step 10. Testing: Conduct electrical performance testing, including capacity, withstand voltage, and reliability.

[0041] Step 11. Packaging: labeling, anti-static bag packaging, and outer box with shockproof material.

[0042] In step seven, centrifugation is performed using a centrifugal device, which includes a workbench 1, a mounting seat 2 is provided on the workbench 1, a clamping drive component 3 is installed on the mounting seat 2, two groups of mounting components 4 are installed on the clamping drive component 3, and the clamping drive component 3 is used to drive the two groups of mounting components 4 to move closer to or away from each other; wax delivery pipes 5 are installed at the bottom of the two groups of mounting components 4, and when the two mounting components 4 approach each other, the two wax delivery pipes 5 are used to clamp at both ends of the film capacitor 300, and the centrifugal device also includes a wax heating circulation component 6, which is connected to the two wax delivery pipes 5, and the two wax delivery pipes 5 are connected to the core space 305 of the film capacitor 300, so that the wax heating circulation component 6, the two wax delivery pipes 5, and the core space 305 form a loop.

[0043] In the above technical solution, if Figure 1 、 Figure 2 and Figure 4 As shown, the mounting component 4 includes a moving seat 41 , a cylinder 42 is mounted on the moving seat 41 , a mounting head 43 is mounted on the output end of the cylinder 42 , the cylinder 42 is used to drive the mounting head 43 to move vertically, and the wax delivery pipe 5 is mounted on the mounting head 43 .

[0044] In the above technical solution, if Figure 1 and Figure 2The clamping drive component 3 includes a fixed frame 31, which is fixedly mounted on the mounting base 2. A motor 32 is mounted on the mounting base 2. A bidirectional screw rod 33 is mounted on the output end of the motor 32. The threads at both ends of the bidirectional screw rod 33 have opposite rotation directions. The two movable seats 41 are respectively threadedly connected to the two ends of the bidirectional screw rod 33.

[0045] It should be noted that since the threads at both ends of the bidirectional screw rod 33 rotate in opposite directions, the motor 1 32 drives the bidirectional screw rod 33 to rotate, and the bidirectional screw rod 33 can drive the two mounting components 4 to move closer to or away from each other to facilitate clamping of the film capacitor 300.

[0046] In the above technical solution, if Figure 1-Figure 3 The wax heating circulation component 6 includes a delivery pump 61 and a heating tank 63 respectively installed on two mounting components 4. The input end of the delivery pump 61 is connected to the heating tank 63 through pipe three 65, and the output end of the delivery pump 61 is connected to one end of one of the wax delivery pipes 5 through pipe one 62, and the other wax delivery pipe 5 is connected to the interior of the heating tank 63 through pipe two 64.

[0047] It should be noted that an electric heater is provided inside the heating tank 63 for heating the wax and melting it. The delivery pump 61 is used to deliver the molten wax, so that the wax circulates sequentially through the delivery pump 61, pipeline 1 62, wax delivery pipe 5, core space 305, wax delivery pipe 5, pipeline 2 64, and heating tank 63. The lower portions of pipeline 1 62 and pipeline 2 64 are both rigid pipes, which are fixed to the movable seat 41. The bottom of the rigid pipe is rotatably connected to and communicates with the wax delivery pipe 5. The upper portion of pipeline 1 62 is a flexible pipe, which communicates with the delivery pump 61. The upper portion of pipeline 2 64 is a flexible pipe, which communicates with the heating tank 63. Pipe 1 62 and pipeline 2 64 are both covered with an insulation layer.

[0048] In this embodiment, the implementation method is as follows: the capacitor that has been vacuum-waxed is placed between two wax delivery tubes 5, and then the two mounting components 4 are driven to approach each other by the clamping driving component 3, so that the two wax delivery tubes 5 clamp the two ends of the capacitor. Figure 1 and Figure 2 As shown, when the film capacitor 300 is placed horizontally, the wax in the core space 305 is in a molten state and is likely to flow out. When the wax solidifies and is re-encapsulated, there will be some air. Therefore, this problem needs to be avoided. After the film capacitor 300 is clamped, the wax is circulated by the delivery pump 61, and the wax and air in the core space 305 are circulated into the heating tank 63. The air is discharged into the heating tank 63 and discharged from the hole on the heating tank 63, and the wax continues to participate in the circulation. When removing the wax, use a tool to block the two ends of the core space 305 to prevent it from flowing out, and wait for the wax to solidify.

[0049] The above technical solution uses vacuum drying to eliminate the internal stress of the capacitor and the gaps between the dielectric film layers of the film capacitor 300, and vacuum wax dipping to fill the gaps inside the dielectric film layer 1 301 and remove air. The wax is insoluble in water and has excellent moisture-proof performance. This production process can effectively reduce the noise and capacitance decay rate of the capacitor.

[0050] Refer to the instruction manual Figures 1-8 The wax delivery pipe 5 is rotatably connected to the mounting head 43. The output end of the cylinder 42 is equipped with a motor 2 7, which is used to drive the wax delivery pipe 5 to rotate. The front end of the wax delivery pipe 5 is connected with an insulation plug 8, which can move along the radial direction of the end of the wax delivery pipe 5 to open or close the end of the wax delivery pipe 5.

[0051] It should be noted that if Figure 1-Figure 3 As shown, the second motor 7 drives the wax delivery pipe 5 to rotate through the bevel gear set 71, and the bevel gear set 71 is composed of two bevel gears.

[0052] Furthermore, the centrifugal device also includes a control component 9, which includes a control disk 90. The control disk 90 is movably mounted on the outside of the wax delivery pipe 5 and fixedly connected to the output end of the cylinder 42. The side of the control disk 90 is provided with an inner ring channel 91 and an outer ring channel 92 located outside the inner ring channel 91. There is a connecting port 93 between the inner ring channel 91 and the outer ring channel 92, and the connecting port 93 connects the inner ring channel 91 and the outer ring channel 92.

[0053] Furthermore, the middle part of the control disk 90 is rotatably connected to the inner switching block 94, and the control disk 90 is fixedly connected to the inner limit shaft 1 95 and the inner limit shaft 2 96 respectively located on both sides of the inner switching block 94. The inner switching block 94 swings between the inner limit shaft 1 95 and the inner limit shaft 2 96, and the inner switching block 94 is reset to the direction of the inner limit shaft 1 95 by the elastic component 1; the edge of the control disk 90 is rotatably connected to the outer switching block 97, and the control disk 90 is fixedly connected to the inner limit shaft 1 95 and the inner limit shaft 2 96 respectively located on both sides of the inner switching block 94. The outer limit shaft 1 98 and the outer limit shaft 2 99 on both sides of 97, the outer switching block 97 swings between the outer limit shaft 1 98 and the outer limit shaft 2 99, and the outer switching block 97 is reset in the direction of the outer limit shaft 1 98 through the elastic component 2, the inner switching block 94 and the outer switching block 97 are respectively used to connect or disconnect the inner ring road 91 and the outer ring road 92 at the position of the connecting port 93, and the guide shaft 81 is fixedly connected to the insulation plug plate 8, and the guide shaft 81 slides inside the inner ring road 91 or the outer ring road 92.

[0054] It should be noted that both the elastic component 1 and the elastic component 2 are torsion springs. Figure 5 As shown, the guide shaft 81 moves inside the inner ring 91. When the heat preservation plug 8 and the guide shaft 81 rotate clockwise, when the guide shaft 81 hits the inner switching block 94, the inner switching block 94 will rotate and press against the inner limit shaft 2 96, as shown in FIG. Figure 6 As shown, the guide shaft 81 can then enter the outer ring road 92 from the position of the connecting port 93, and then the inner switching block 94 is reset under the action of the torsion spring. When the guide shaft 81 slides clockwise inside the outer ring road 92, when it encounters the outer switching block 97, the outer switching block 97 will rotate and press against the outer limit shaft 2 99, as shown in FIG. Figure 7 As shown, the guide shaft 81 can then enter the inner annular channel 91 from the position of the connecting port 93, and then the outer switching block 97 is reset under the action of the torsion spring.

[0055] Furthermore, the upper end of the wax delivery pipe 5 is fixedly connected to a pressure rod 100, and an arc-shaped pressure plate 101 is fixedly connected to the pressure rod 100. A support component 200 is installed on the workbench 1, and the support component 200 includes a support seat 201. Both sides of the support seat 201 are fixedly installed with U-shaped plates 202, and both sides of the upper end of the U-shaped plate 202 have an outward folding portion 203 extending obliquely upward.

[0056] It should be noted that the U-shaped plate 202 is used to support the film capacitor 300 .

[0057] In this embodiment, after centrifuging the film capacitor 300, a tool is used to block both ends of the core space 305 to prevent the wax from flowing out. This operation is difficult, and removing the tool may remove some wax, resulting in incomplete filling. Therefore, in this embodiment, after centrifugation is completed, the film capacitor 300 is fixed, isolating the wax delivery tube 5 from the core space 305, and rotating the wax delivery tube 5. In this way, after the wax in the core space 305 solidifies, the film capacitor 300 can be directly removed.

[0058] Specifically, before the wax delivery tube 5 is used to clamp the film capacitor 300, the heat preservation plug 8 closes the end of the wax delivery tube 5. After the two wax delivery tubes 5 clamp the film capacitor 300, the surface of the heat preservation plug 8 contacts the end of the film capacitor 300 to seal the core space 305, and the motor 2 7 drives the wax delivery tube 5, the heat preservation plug 8 and the guide shaft 81 to rotate clockwise ( Figure 5 ), the guide shaft 81 enters the interior of the outer annular channel 92 from the position of the connecting port 93. At this time, the guide shaft 81 drives the heat-insulating plug plate 8 to move upward to open the wax delivery pipe 5, so that the wax delivery pipe 5 and the core space 305 are connected. Then the wax heating circulation component 6 can circulate the wax to eliminate air. During this process, the wax delivery pipe 5 is driven to rotate by the motor 2 7 and the bevel gear set 71, and the two wax delivery pipes 5 drive the film capacitor 300 to rotate, so that centrifugation can be performed. It should be noted that during the centrifugation process, the wax delivery pipe 5 rotates in a reciprocating manner, that is, it is necessary to ensure that the guide shaft 81 moves in the outer annular channel 92 and does not move to the position of the connecting port 93 to prevent the guide shaft 81 from entering the inner annular channel 91.

[0059] After centrifugation is complete, motor 2 (7) drives wax delivery pipe 5, insulation plug plate 8, and guide shaft 81 to rotate clockwise, causing guide shaft 81 to return from outer annular path 92 to the interior of inner annular path 91. At this time, guide shaft 81 drives insulation plug plate 8 to close wax delivery pipe 5. The surface of insulation plug plate 8 contacts the end of film capacitor 300, blocking core space 305. Moving seat 41 drives film capacitor 300 downward, supporting film capacitor 300 on outer folding portion 203. Pressing rod 100 and arc-shaped pressing plate 101 move together with guide shaft 81, so that when moving downward, they can contact the upper surface of film capacitor 300 to limit the upper end of film capacitor 300. Then motor 2 (7) drives wax delivery pipe 5 to rotate again. At this time, because film capacitor 300 is supported and limited, it cannot rotate. Alternatively, clamping drive component 3 can be used to appropriately adjust the clamping force to allow relative rotation between wax delivery pipe 5 and film capacitor 300. During this process, the wax delivery pipe 5 also rotates back and forth, that is, it is necessary to ensure that the guide shaft 81 moves in the inner annular channel 91 and does not move to the position of the connecting port 93 to prevent the guide shaft 81 from entering the outer annular channel 92.

[0060] In the above technical solution, by setting the heat-insulating plug plate 8, after the wax delivery pipe 5 is sealed, the purpose of heat insulation can be achieved. When the wax delivery pipe 5 and the film capacitor 300 rotate relative to each other, on the one hand, the wax in the core space 305 can be solidified, and on the other hand, no adhesion will occur between the heat-insulating plug plate 8 and the wax in the core space 305. In this way, when the film capacitor 300 is removed, the wax in the core space 305 will not be brought out.

[0061] Refer to the instruction manual Figures 1-10 A low-noise, low-capacitance-loss film capacitor is manufactured using the aforementioned manufacturing process. The film capacitor 300 sequentially includes a dielectric film layer 1 301, a metal foil layer 1 302, a dielectric film layer 2 303, and a metal foil layer 2 304. The dielectric film layer 1 301, the metal foil layer 1 302, the dielectric film layer 2 303, and the metal foil layer 2 304 are wound into a roll. The film capacitor 300 has a core space 305 in the middle, which is filled with wax. The metal foil layer 1 302 and the metal foil layer 2 304 are connected by metal pins. The outside of the film capacitor 300 is a protective layer.

[0062] It should be noted that the material of the metal foil layer 1 302 and the metal foil layer 2 304 is aluminum or copper, the material of the dielectric film layer 1 301 and the dielectric film layer 2 303 is polyethylene or polypropylene or polystyrene or polycarbonate, the wax is paraffin, and the protective layer is epoxy resin.

[0063] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A process for producing a low-noise, low-capacitance-loss film capacitor, characterized by: The production process includes coating, slitting, winding, vacuum drying, gold spraying, vacuum wax dipping, centrifugation, welding, packaging, testing and packaging. The centrifugal device comprises a workbench (1), a mounting seat (2) is provided on the workbench (1), a clamping drive component (3) is installed on the mounting seat (2), two groups of mounting components (4) are installed on the clamping drive component (3), and the clamping drive component (3) is used to drive the two groups of mounting components (4) to move closer to or farther away from each other; wax delivery pipes (5) are installed at the bottoms of the two groups of mounting components (4), and when the two mounting components (4) move closer to each other, the two wax delivery pipes (5) are used to clamp at both ends of the film capacitor (300); the centrifugal device further comprises a wax heating circulation component (6), the wax heating circulation component (6) is connected to the two wax delivery pipes (5), and the two wax delivery pipes (5) are connected to the core space (305) of the film capacitor (300), so that the wax heating circulation component (6), the two wax delivery pipes (5), and the core space (305) form a loop; The mounting component (4) includes a movable seat (41), a cylinder (42) is mounted on the movable seat (41), a mounting head (43) is mounted on the output end of the cylinder (42), the cylinder (42) is used to drive the mounting head (43) to move vertically, and the wax delivery pipe (5) is mounted on the mounting head (43); The wax delivery pipe (5) is rotatably connected to the mounting head (43), and a second motor (7) is installed at the output end of the cylinder (42). The second motor (7) is used to drive the wax delivery pipe (5) to rotate. The front end of the wax delivery pipe (5) is plugged with a heat-insulating plug-in plate (8), and the heat-insulating plug-in plate (8) can move along the radial direction of the end of the wax delivery pipe (5) to open or close the end of the wax delivery pipe (5).

2. The process for producing a low-noise and low-capacitance-attenuation thin-film capacitor according to claim 1, characterized in that: The temperature and time of vacuum drying are 85 degrees for 40 minutes, 110 degrees for 90 minutes, and 85 degrees for 40 minutes, respectively, and the vacuum degree is -0.1Mpa; the vacuum wax dipping time is 8 to 10 hours.

3. The process for producing a low-noise and low-capacitance-loss thin-film capacitor according to claim 2, characterized in that: The centrifugal device further comprises a control component (9), wherein the control component (9) comprises a control disk (90), wherein the control disk (90) is movably sleeved on the outside of the wax delivery pipe (5) and fixedly connected to the output end of the cylinder (42), wherein the side of the control disk (90) is provided with an inner ring channel (91) and an outer ring channel (92) located outside the inner ring channel (91), and a communication port (93) is provided between the inner ring channel (91) and the outer ring channel (92), wherein the communication port (93) connects the inner ring channel (91) and the outer ring channel (92).

4. The process for producing a low-noise and low-capacitance-loss thin-film capacitor according to claim 3, characterized in that: The middle of the control disk (90) is rotatably connected to an inner switching block (94), and the control disk (90) is fixedly connected to an inner limit shaft 1 (95) and an inner limit shaft 2 (96) respectively located on both sides of the inner switching block (94). The inner switching block (94) swings between the inner limit shaft 1 (95) and the inner limit shaft 2 (96), and the inner switching block (94) is reset in the direction of the inner limit shaft 1 (95) through an elastic component 1; the edge of the control disk (90) is rotatably connected to an outer switching block (97), and the control disk (90) is fixedly connected to an inner limit shaft 1 (95) and an inner limit shaft 2 (96) respectively located on both sides of the outer switching block (97). The outer limit shaft (98) and the outer limit shaft (99) are respectively connected to each other, the outer switching block (97) swings between the outer limit shaft (98) and the outer limit shaft (99), and the outer switching block (97) is reset in the direction of the outer limit shaft (98) through the elastic component (94). The inner switching block (94) and the outer switching block (97) are respectively used to connect or disconnect the inner ring road (91) and the outer ring road (92) at the position of the connecting port (93). The heat preservation plug plate (8) is fixedly connected to a guide shaft (81), and the guide shaft (81) slides inside the inner ring road (91) or the outer ring road (92).

5. The process for producing a low-noise and low-capacitance-attenuation thin film capacitor according to claim 4, characterized in that: The upper end of the wax delivery pipe (5) is fixedly connected to a pressure rod (100), and an arc-shaped pressure plate (101) is fixedly connected to the pressure rod (100). A support component (200) is installed on the workbench (1), and the support component (200) includes a support seat (201). U-shaped plates (202) are fixedly installed on both sides of the support seat (201), and both sides of the upper end of the U-shaped plate (202) have an outer folding portion (203) extending obliquely upward.

6. The process for producing a low-noise and low-capacitance-loss thin-film capacitor according to claim 5, characterized in that: The wax heating circulation component (6) comprises a delivery pump (61) and a heating tank (63) respectively mounted on two mounting components (4). The input end of the delivery pump (61) is connected to the heating tank (63) via a third pipe (65). The output end of the delivery pump (61) is connected to one end of one of the wax delivery pipes (5) via a first pipe (62). The other wax delivery pipe (5) is connected to the interior of the heating tank (63) via a second pipe (64).

7. The process for producing a low-noise and low-capacitance-loss thin-film capacitor according to claim 6, characterized in that: The clamping drive component (3) includes a fixed frame (31), the fixed frame (31) is fixedly mounted on the mounting seat (2), a motor 1 (32) is mounted on the mounting seat (2), a bidirectional screw rod (33) is mounted on the output end of the motor 1 (32), the threads at both ends of the bidirectional screw rod (33) are rotated in opposite directions, and the two movable seats (41) are respectively connected to the two ends of the bidirectional screw rod (33) by threaded transmission.

8. A low-noise, low-capacitance-loss film capacitor, manufactured using the production process according to any one of claims 1 to 7, characterized in that: The film capacitor (300) comprises a dielectric film layer 1 (301), a metal foil layer 1 (302), a dielectric film layer 2 (303) and a metal foil layer 2 (304) in sequence. The dielectric film layer 1 (301), the metal foil layer 1 (302), the dielectric film layer 2 (303) and the metal foil layer 2 (304) are wound into a roll. A core space (305) is provided in the middle of the film capacitor (300). The core space (305) is filled with wax. The metal foil layer 1 (302) and the metal foil layer 2 (304) are connected with metal pins. The outside of the film capacitor (300) is a protective layer.

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