Silicon coating device for thin film capacitor

Abstract

The present invention proposes a silicon coating device for a film capacitor, which relates to the technical field of capacitor manufacturing equipment. The structure includes a silicon coating structure, which includes two mounting seats arranged in pairs, each of which is provided with an airbag, a movement channel is provided between the two airbags, and oil guide grooves are provided on the opposite side walls of the two airbags. A plurality of drainage holes connected to the oil guide grooves are provided in the airbags along their axial direction, and both ends of the airbags have inwardly recessed grooves; a pushing structure for controlling the two ends of the airbag to make an inwardly recessed movement along their axial direction is provided in the mounting seat, and a supporting mechanism for supporting the inner wall of the airbag is provided in the airbag. The two airbags are close to each other so that the oil guide grooves are enclosed into an annular through groove, so that the part of the capacitor electrode that needs to be coated with silicone oil can be wrapped and coated at one time; the length of the airbag is controlled by the pushing structure to adapt to different capacitor electrodes and perform coating operations, thereby improving the processing efficiency when coating the electrodes with oil.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitor manufacturing equipment, and in particular to a silicon coating device for thin film capacitors. Background Art

[0002] In the production process of film capacitors, for the needs of subsequent processes, the film capacitors need to be spaced apart, and the leads are glued to long aluminum strips with tape (called "braiding" in the industry), and then sent to the spraying station for silicone coating, that is, the lead is coated with silicone oil within a range of about 10mm close to the core to ensure that the lead is not wrapped when the core is subsequently dipped in epoxy resin, thereby maintaining the solderability of the lead.

[0003] At present, most of the existing silicon coating methods are to spray silicone oil from a nozzle by pumping and spray it on the lead (for example, the prior art with publication number "CN2563736"). Spraying or brushing are not effective in coating the lead with silicon. In addition, the existing devices for coating the lead with silicon cannot cover it as much as possible in one spray, which easily causes repeated spraying of the same area, uneven spraying, and even missing coating in some places, resulting in failure to protect the lead well in subsequent processes. Summary of the invention

[0004] The object of the present invention is to provide a silicon coating device for thin film capacitors, which can solve the problems raised by the above-mentioned background technology in view of the shortcomings of the prior art.

[0005] The technical solution of the present invention is achieved in this way:

[0006] The present invention provides a silicon coating device for a film capacitor, comprising a silicon coating structure, wherein the silicon coating structure comprises two mounting seats arranged in pairs, each of which is provided with an airbag, a movement channel is provided between the two airbags, oil guide grooves are provided on opposite side walls of the two airbags, a plurality of drainage holes connected with the oil guide grooves are provided in the airbags along their axial direction, and both ends of the airbags have inwardly recessed grooves; a pushing structure for controlling the two ends of the airbags to make inwardly recessed movement along their axial direction is provided in the mounting seat, and a supporting mechanism for supporting the inner wall of the airbag is provided in the airbag.

[0007] In some technical schemes of the present invention, the pushing structure includes a push rod respectively installed on two opposite side walls of the mounting seat, and a top block is provided on the telescopic end of the push rod, and the top block is installed in the sink groove; a limit seat is provided on the inner end surface of the airbag, and an adjustment spring is provided between the two limit seats.

[0008] In some technical solutions of the present invention, the support mechanism includes multiple retractable support structures installed in the airbag, and the side walls of the limit seat are surrounded by multiple support arms corresponding to the support structures one by one, one end of the support arm is hinged to the support structure; the other end of the support arm is in contact with the adjustment spring.

[0009] In some technical solutions of the present invention, the support structure includes two first support plates and a second support plate. The first support plates are each provided with an installation groove. The two ends of the second support plate are respectively slidably arranged in the two installation grooves. The installation grooves are provided with limit springs that abut against the second support plates.

[0010] In some technical solutions of the present invention, each of the limit seats is provided with a shaft connected to the corresponding top block, and a driving motor drivingly connected to the shaft is provided in one of the top blocks.

[0011] In some technical solutions of the present invention, both ends of the airbag are provided with end covers abutting therewith, a plurality of return springs connected to the end covers are arranged around the side walls of the mounting seat, and a sealing block is provided on the side wall opposite to the end cover and the airbag, and the sealing block is embedded in the oil guide groove.

[0012] In some technical solutions of the present invention, a semi-circular arc groove is provided on the side wall of the blocking block facing away from the airbag, and the axis of the circle where the semi-circular arc groove is located is parallel to the axis of the circle where the oil guide groove is located.

[0013] In some technical schemes of the present invention, a frame is also included. The number of silicon-coated structures is two groups, and the two groups of silicon-coated structures are installed on the top of the frame. The frame is provided with an adjustment component for driving the relative movement of two mounting seats located in the silicon-coated structure, and the frame is provided with a transmission mechanism for transmitting capacitors.

[0014] In some technical solutions of the present invention, the positioning assembly includes a plurality of cylinders mounted on the frame corresponding to the two mounting seats, and the telescopic ends of the cylinders are connected to the corresponding mounting seats.

[0015] In some technical solutions of the present invention, mounting frames are installed on both sides of the frame, and a sliding frame connected to the cylinder is slidably provided on the mounting frame.

[0016] Compared with the prior art, the present invention has at least the following advantages or beneficial effects:

[0017] When the two airbags are close to each other, the two oil guide grooves are enclosed into a ring-shaped through groove, which is adapted to the electrode of the capacitor, and can wrap the part of the capacitor electrode that needs to be coated with silicone oil, and the coating is completed at one time;

[0018] The two ends of the airbag are controlled to move inwardly along the axial direction by the pushing structure. The two ends of the airbag are pushed to move inwardly along the axial direction into the airbag body by the above structure, thereby changing the effective length of the airbag, so that the length of the airbag in the actual working state is matched with the part of the electrode of the capacitor to be processed that needs to be oiled, thereby improving the processing accuracy of the electrode oiling;

[0019] The length of the airbag can be adapted to the silicon coating operation of different electrodes under the control of the driving structure; the supporting mechanism installed on the limit seat is mobilized by the driving motor to make a circular motion in the airbag, so that the silicone oil in the airbag is in a flowing state, so as to avoid the crystallization of the silicone oil after being stationary for a long time, resulting in the problem of uneven coating of the silicone oil on the electrode;

[0020] And any one group of supporting structures will cover the drainage hole, blocking the connection between the airbag and the drainage hole; when the driving motor mobilizes the supporting mechanism installed on the limit seat to make a circular motion in the airbag, any one group of supporting structures will not cover the drainage hole at a certain period of time during the movement. At this time, the airbag is connected to the drainage hole, and silicone oil is discharged from the drainage hole. At this time, the supporting structure will play a role of dynamically closing the drainage hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the installation structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 A schematic diagram of a partial cross-sectional structure in side view;

[0024] Figure 3 It is a schematic diagram of the combination of two groups of silicon-coated structures in the present invention;

[0025] Figure 4 Schematic diagram of the internal structure of the silicon-coated structure in the present invention;

[0026] Figure 5 It is a schematic diagram of the expanded structure of the silicon-coated structure in the present invention;

[0027] Figure 6 It is a schematic cross-sectional structural diagram of the silicon-coated structure in the present invention;

[0028] Figure 7 It is a schematic diagram of the cross-sectional structure of the airbag in the invention;

[0029] Figure 8 For the present invention Figure 7 A schematic diagram of the local enlarged structure at point A in the middle;

[0030] Fig. 9 It is a schematic diagram of the installation structure of the ventilation groove in the present invention.

[0031] Icons: 1. Frame; 2. Capacitor; 3. Conveyor belt; 4. Conveyor roller; 5. Suction cup; 6. Air bag; 7. Mounting frame; 8. Sliding frame; 9. Cylinder bracket; 10. Mounting seat; 11. End cover; 12. Top block; 13. Adjustment spring; 14. Push rod; 15. Support structure; 151. First support plate; 152. Second support plate; 16. Return spring; 17. Drain hole; 18. Limit seat; 19. Support arm; 20. Block; 21. Vent groove; 22. Cylinder; 23. Drive motor; 24. Sink; 25. Oil guide groove. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] Please refer to Figure 1-Figure 9 shown.

[0036] The present invention provides a silicon coating device for thin film capacitors, such as Figure 2-Figure 6As shown, it includes a silicon-coated structure, which includes two mounting seats 10 arranged in pairs, each of which is provided with an airbag 6, and a movement channel with a gap for the electrode of the capacitor 2 to pass through is provided between the two airbags 6. The two airbags 6 are provided with an oil guide groove 25 on the opposite side walls. When the two airbags 6 are close to each other, the two oil guide grooves 25 are enclosed into an annular through groove, which is adapted to the electrode of the capacitor 2, and the part of the electrode of the capacitor 2 that needs to be coated with silicone oil can be wrapped, and the coating is completed at one time. A plurality of oil guide grooves 25 connected to the oil guide groove 25 are provided in the airbag 6 along its axial direction. The drainage hole 17 is a capillary hole, so that the amount of silicone oil discharged from the airbag is small, and a large amount of silicone oil is prevented from being ejected from the drainage hole 17, so that the silicone oil applied to the electrode of the capacitor 2 is excessive and covers the electrode that does not need to be coated with silicone oil; an oil delivery hose is provided on the outer wall of the airbag 6, so that the external pumping equipment can deliver the silicone oil to the airbag 6, and the airbag 6 is pre-stored with silicone oil. As long as the pumping equipment delivers a small amount of oil into the airbag 6, the oil pressure in the airbag 6 increases, and part of the silicone oil is introduced from the drainage hole 17 into the oil guide groove 25 to perform the silicon coating operation on the electrode; In order to make the length of the airbag 6 adapt to the silicon coating operation of different electrodes, the present structure is provided with an inwardly concave groove 24 at both ends of the airbag 6; a pushing structure for controlling the two ends of the airbag 6 to make an inward concave movement along its axial direction is provided in the mounting seat 10, and the two ends of the airbag 6 are pushed to make a concave movement toward the body of the airbag 6 along its axial direction by the above structure, thereby changing the effective length of the airbag 6, so that the actual working state length of the airbag 6 is adapted to the part of the electrode of the capacitor to be processed that needs to be coated with oil, thereby improving the processing accuracy of the electrode coating; the airbag 6 is provided with a push mechanism for controlling the two ends of the airbag 6 to make an inward concave movement along its axial direction. The supporting mechanism for supporting the inner wall can make telescopic movements together with the airbag 6. The supporting mechanism can ensure that when the two ends of the airbag 6 are gradually sunken into the body of the airbag 6 under the action of the pushing structure or when the two ends of the airbag 6 are gradually retracted from the sinking groove 24, the non-folded area of ​​the airbag 6 maintains a certain hardness; the inner diameter of the airbag 6 is maintained in a relatively stable state without drastic changes; it also avoids the problem that the middle part of the airbag 6 is bulged due to the action of the pushing structure, causing most of the oil guide groove 25 to not contact the electrode of the capacitor, which makes the problem of poor coating effect in the later stage prominent.

[0037] In some technical schemes of the present invention, the pushing structure includes a push rod 14 respectively installed on two opposite side walls of the mounting seat 10, the body of the push rod 14 is fixed to the mounting seat 10 by bolts, and a top block 12 is provided on the telescopic end of the push rod 14 by a threaded connection. The top block 12 includes two sections, one section of which is connected to the end face of the airbag 6 and is a solid cylinder, and the other section of which is in contact with the inner wall of the sink 24 and is cylindrical, so that the drainage hole 17 folded inwardly in the sink 24 can be blocked when the airbag 6 is in an inwardly folded state. A sealing rubber sleeve is provided on the cylindrical section of the top block 12, and the sealing rubber sleeve has a convex ridge adapted to the oil guide groove 25, which is not shown in the figure, and is used to seal the drainage hole 17. Block to avoid oil leakage; the cylindrical section of the top block 12 can provide support for the inward folded portion of the airbag 6 when the end of the airbag 6 is folded inwardly in the airbag 6, the top block 12 is installed in the sink 24 and adapted thereto, and when the end of the airbag 6 is folded inwardly in the airbag 6, the inward folded portion and the unbent portion of the airbag fit each other, and the gap between the two is used to install the support structure 15; a limit seat 18 is provided on the inner end surface of the airbag 6, and an adjusting spring 13 is provided between the two limit seats 18, so that when the two ends of the airbag 6 are bent inwardly, the unbent end of the airbag 6 has a certain toughness and presents a relatively straight state, so that the inner diameter of the middle part of the airbag 6 does not change significantly, so that the oil guide groove 25 fits better with the electrode of the capacitor.

[0038] In some technical schemes of the present invention, the support mechanism includes a plurality of retractable support structures 15 installed in the airbag 6, the limit seat 18 is a stepped column, the adjustment spring 13 is sleeved on the small diameter section of the limit seat 18, and the side walls of the limit seat 18 are surrounded by a plurality of support arms 19 corresponding to the support structure 15 one by one. The support arm 19 is rotatably arranged on the large diameter section of the limit seat 18 through a pin shaft, and one end of the support arm 19 is hinged to the support structure 15; the other end of the support arm 19 abuts against the adjustment spring 13.

[0039] The linkage working process of the pushing structure and the supporting mechanism is as follows: when the actual length of the airbag 6 needs to be reduced, the telescopic ends of the push rods 14 respectively located on both sides of the airbag 6 gradually move out of the body of the push rod 14, and the top block 12 gradually folds the two ends of the airbag 6 inward under the push of the telescopic ends of the push rod 14 until the depth of the sinking groove 24 in the airbag 6 gradually increases, and the actual length of the airbag 6 gradually decreases; the effective length of the supporting structure 15 in the supporting mechanism gradually decreases with the length of the airbag 6; and the adjusting spring 13 is gradually compressed by the squeezing of the two top blocks 12, and applies a thrust to the supporting arm 19 arranged on the limiting seat 18, at which time the supporting arm 19 flips over on the limiting seat 18, The angle between the two gradually increases; the support arm 19 will apply a radial thrust to the support structure 15, thereby providing a supporting force for the unbent end of the airbag 6, and the inner diameter of the unbent section of the airbag 6 does not change significantly, and the problem of bulge or collapse in the middle of the airbag 6 is avoided; at this time, the pumping equipment no longer continues to transport oil to the airbag 6, but instead extracts the oil from the airbag 6 out of its interior, to prevent the silicone oil in the airbag 6 from entering its body due to the inward bending movement of the two ends of the airbag 6, and squeezing the silicone oil in the airbag 6 out of the drainage hole 17 through the drainage hole, causing waste of silicone oil; after the adjustment is completed, the oiling operation is carried out, and the next step is to enter the oiling operation. When the actual length of the airbag 6 needs to be increased, the telescopic ends of the push rods 14 located on both sides of the airbag 6 gradually retreat into the body of the push rod 14, and the top block 12 will pull the telescopic ends of the push rod 14 to gradually pull the end of the airbag 6 out of the airbag 6 in the inwardly folded state, the depth of the sink 24 will gradually decrease, and the actual length of the airbag 6 will gradually increase; the effective length of the support structure 15 in the support mechanism will gradually increase with the length of the airbag 6. At this time, the accommodating capacity of the airbag 6 increases, and the pumping equipment no longer continues to transport oil to the airbag 6. In this way, when the airbag changes, the silicone oil will not be discharged through the drain hole 17, avoiding the problem of silicone oil being wasted; after the adjustment is completed, the oiling operation is performed, and the next process is entered for the oiling operation.

[0040] Preferably, the diameter of the drainage hole 17 does not change with the change of the airbag 6 .

[0041] In some technical solutions of the present invention, the number of support structures 15 is 3 groups, and the support structure 15 includes two first support plates 151 and a second support plate 152. The first support plate 151 and the second support plate 152 are both arc-shaped thin-walled structures with good rigidity. The arc length of the arc plate is about one-third of the circumference of the circle where it is located, and there is a gap between any two adjacent support structures 15. The first support plate 151 is provided with a mounting groove, and the two ends of the second support plate 152 are respectively slidably arranged in the two mounting grooves. The mounting groove is provided with a limit spring that abuts against the second support plate 152. The above structure enables the support structure 15 to have the ability to automatically reset after being compressed and stretched. The first support plate 151 and the second support plate 152 are both in contact with the inner wall of the bending section of the airbag 6 and can slide relative to each other, and the friction coefficient between the two is small.

[0042] In some technical solutions of the present invention, the limit seat 18 is provided with a shaft connected to the corresponding top block 12, and the ends of the shaft and the airbag 6 are provided with sealing rings or sealing bearings for realizing dynamic sealing to prevent silicone oil leakage, and a driving motor 23 connected to the shaft is provided in one of the top blocks 12. The driving motor 23 is used to mobilize the support mechanism installed in the limit seat 18 to make a circular motion in the airbag 6, so that the silicone oil in the airbag 6 can be in a flowing state, so as to prevent the silicone oil from crystallizing after being left still for a long time, causing the silicone oil applied on the electrode to be unevenly applied.

[0043] Preferably, in the initial state, any group of support structures 15 covers the drainage hole 17, blocking the airbag 6 and the drainage hole 17. When the drive motor 23 mobilizes the support mechanism installed on the limit seat 18 to make a circular motion in the airbag 6, any group of support structures 15 does not cover the drainage hole 17 for a certain period of time during the movement. At this time, the airbag 6 is connected to the drainage hole 17, and the silicone oil is discharged from the drainage hole 17. At this time, the support structure 15 will dynamically open and close the drainage hole 17, so that the oil is periodically discharged from the airbag 6.

[0044] In some technical solutions of the present invention, both ends of the airbag 6 are provided with end caps 11 abutting against them, and the end caps 11 are disc-shaped, and an assembly groove is provided on the side wall opposite to the airbag 6, which is adapted to the end of the airbag 6. A plurality of return springs 16 connected to the end caps 11 are arranged around the side wall of the mounting seat 10, so that the end caps 11 and the transition between the inner bending section and the unbending section of the airbag 6 fit more closely, and a sealing gasket is provided in the assembly groove to fit the transition between the inner bending section and the unbending section of the airbag 6, thereby improving the security of the two. Sealing effect: a sealing block 20 is provided on the side wall of the end cover 11 opposite to the airbag 6. The sealing block 20 is a rubber block with certain elasticity. A spring sheet connected to the end cover 11 is provided inside the sealing block 20, which is not shown in the drawing. The sealing block 20 is embedded in the oil guide groove 25 to seal the drainage hole 17 provided in the oil guide groove 25, that is, to seal the drainage hole 17 at the transition between the inner bending section and the unbending section of the airbag 6 to prevent silicone oil from dripping from the above-mentioned part onto the electrode, causing an increase in silicone oil on the electrode and uneven coating.

[0045] Preferably, a liquid guide port is provided in the end cap 11, which is connected to an external negative pressure device and is used to guide and collect the silicone oil between the end cap 11 and the airbag 6, although it is not shown in the figure.

[0046] In some technical solutions of the present invention, a semicircular arc groove is formed on the side wall of the blocking block 20 away from the airbag 6, and the axis of the circle where the semicircular arc groove is located is parallel to the axis of the circle where the oil guide groove 25 is located. In this way, when the electrode is embedded in the oil guide groove 25, the blocking block 20 is prevented from hindering the electrode and the oil guide groove 25 from matching each other, causing some electrodes to be unable to perform synchronous oiling operations.

[0047] In some technical solutions of the present invention, a frame 1 is also included, and the number of silicon-coated structures is two groups, which can simultaneously coat two electrodes of the same capacitor to speed up the processing speed of the capacitor. The two groups of silicon-coated structures are installed on the top of the frame 1. The frame 1 is provided with a positioning assembly for driving the two mounting seats 10 located in the silicon-coated structure to move relative to each other. The positioning assembly includes a plurality of cylinders 22 installed on the frame 1 corresponding to the two mounting seats 10, one mounting seat 10 corresponds to two cylinders 22, and the two cylinders 22 are arranged on both sides of the mounting seat 10. When the telescopic end of the cylinder 22 located on the upper side gradually retracts out of its body, the airbag 6 located on the upper side moves downward, and when the telescopic end of the cylinder 22 located on the lower side gradually retracts out of its body, the airbag 6 located on the lower side moves upward, so that the two airbags 6 can approach each other and squeeze the electrode, so that the silicone oil in the oil guide groove 25 fits with the electrode, and the two airbags 6 will not cause damage to the electrode when they approach each other because they have a certain flexibility.

[0048] The two cylinders 22 located on both sides of the same mounting seat 10 are connected through a cylinder bracket 9 .

[0049] In some technical schemes of the present invention, mounting frames 7 are installed on both sides of the frame 1, and sliding frames 8 connected to the cylinders 22 located on the same side are slidably provided on the mounting frames 7. The sliding frames 8 are locked on the mounting frames 7 by electromagnets. This structure is not shown in the drawings. In this way, the relative spacing between the two groups of silicon-coated structures can be adjusted to adapt to capacitors of different sizes for silicon coating operations.

[0050] A transmission mechanism for transmitting capacitors is provided in the frame 1, and the transmission mechanism includes a ring-shaped transmission belt 3 installed in the frame 1, and two transmission rollers 4 are provided in the frame 1 and are transmission-connected to the transmission belt 3, and the transmission rollers 4 are equipped with a motor for driving the transmission belt 3 to perform periodic circular motion; and a suction cup 5 is arranged around the transmission belt 3, and the suction cup 5 is embedded in the transmission belt 3. The suction cup 5 is connected to the ventilation groove 21 installed on the inner wall of the frame 1 through an air guide tube, and the ventilation groove 21 is connected to the external negative pressure equipment, which continuously provides an adsorption force for the suction cup, adsorbs the capacitor on the transmission belt 3, so that the electrode of the capacitor 2 can pass through the movement channel formed between the two air bags 6, and then the electrode of the capacitor 2 is oiled.

[0051] The ventilation groove 21 is divided into three sections, one of which is an arc section, and the other two are horizontal sections, one of which is half of the horizontal section of the conveyor belt 3, and the other horizontal section is equal to the horizontal section of the conveyor belt 3; the capacitor 2 is transmitted from the lower side of the rack 1 to the movement channel through the conveyor belt 3. After the capacitor 2 is oiled, it continues to move a shorter section of the ventilation groove 21 driven by the conveyor belt 3. The suction cup 5 no longer generates suction on the capacitor 2. At this time, the capacitor 2 is taken away from the conveyor belt 3 by the robotic arm and enters the next process.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A silicon coating device for thin film capacitors, characterized in that: The invention comprises a silicon-coated structure, wherein the silicon-coated structure comprises two mounting seats (10) arranged in pairs, each of the mounting seats (10) being provided with an airbag (6), a movement channel being provided between the two airbags (6), an oil guide groove (25) being provided on opposite side walls of the two airbags (6), a plurality of drainage holes (17) being provided in the airbag (6) along its axial direction and communicating with the oil guide groove (25), and an oil delivery hose being provided on the outer wall of the airbag (6); both ends of the airbag (6) being provided with an inwardly concave groove (24); a pushing structure for controlling the two ends of the airbag (6) to move inwardly along its axial direction being provided in the mounting seat (10), and a supporting mechanism for supporting the inner wall of the airbag (6); The pushing structure comprises a push rod (14) respectively mounted on two opposite side walls of the mounting seat (10), a top block (12) being provided on the telescopic end of each push rod (14), and the top block (12) being mounted in the sink (24); a limit seat (18) being provided on the inner end surface of each air bag (6), and an adjustment spring (13) being provided between the two limit seats (18); The support mechanism comprises a plurality of retractable support structures (15) installed in the airbag (6); a plurality of support arms (19) corresponding to the support structures (15) are arranged around the side walls of the limit seat (18); one end of the support arm (19) is hinged to the support structure (15); the other end of the support arm (19) is in contact with the adjustment spring (13); The support structure (15) comprises two first support plates (151) and a second support plate (152), wherein each of the first support plates (151) is provided with a mounting groove, and both ends of the second support plate (152) are respectively slidably arranged in the two mounting grooves, and a limit spring abutting against the second support plate (152) is arranged in the mounting groove; Each of the limit seats (18) is provided with a shaft connected to the corresponding top block (12), and one of the top blocks (12) is provided with a driving motor (23) drivingly connected to the shaft; Both ends of the airbag (6) are provided with end covers (11) abutting against the airbag, a plurality of return springs (16) connected to the end covers (11) are arranged around the side wall of the mounting seat (10), and a blocking block (20) is provided on the side wall of the end cover (11) opposite to the airbag (6), and the blocking block (20) is embedded in the oil guide groove (25).

2. A silicon coating device for thin film capacitors according to claim 1, characterized in that: A semi-circular arc groove is formed on the side wall of the blocking block (20) facing away from the air bag (6), and the axis of the circle where the semi-circular arc groove is located is parallel to the axis of the circle where the oil guide groove (25) is located.

3. A silicon coating device for thin film capacitors according to claim 1 or 2, characterized in that: It also comprises a frame (1), the number of the silicon-coated structures being two groups, the two groups of silicon-coated structures being mounted on the top of the frame (1), the frame (1) being provided with a positioning assembly for driving two mounting seats (10) located in the silicon-coated structures to move relative to each other, and the frame (1) being provided with a transmission mechanism for transmitting capacitors.

4. The silicon coating device for thin film capacitors according to claim 3, characterized in that: The positioning assembly comprises a plurality of cylinders (22) mounted on the frame (1) and corresponding to the two mounting seats (10), wherein telescopic ends of the cylinders (22) are connected to the corresponding mounting seats (10).

5. The silicon coating device for thin film capacitors according to claim 4, characterized in that: Mounting frames (7) are mounted on both sides of the frame (1), and a sliding frame (8) connected to the cylinder (22) is slidably disposed on the mounting frame (7).

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