A coating device for producing capacitor metallized film

Abstract

The present invention discloses a coating device for producing capacitor metallized film, comprising a coating chamber, a evaporation generating device is arranged in the coating chamber, a film material roller, a winding roller, a coating guide roller and a plurality of guide rollers are rotatably installed in the coating chamber, a film coil is mounted on the film material roller, the film passes around the coating guide roller and the plurality of guide rollers and is connected to the winding roller; a driving chamber is arranged on one side of the coating chamber, a first motor and a second motor are arranged in the driving chamber, the output shaft of the first motor is connected to one end of the film material roller located in the driving chamber through a clutch, the output shaft of the second motor is connected to one end of the winding roller located in the driving chamber through a clutch, and the film material roller, the winding roller, the coating guide roller and the plurality of guide rollers located in the driving chamber are connected by a transmission belt coil transmission. The coating device can replace the film with a transmission belt to play the role of transmission and bearing tension, so that the film will not be deformed by tension, thereby improving the coating effect of the film.

Description

Technical Field

[0001] The invention relates to the technical field of capacitor film production, and in particular to a coating device for producing capacitor metallized films. Background Art

[0002] The manufacturing method of metallized film capacitors is to vacuum-deposit a thin layer of metal on a plastic film to serve as an electrode. This can save the thickness of the electrode foil and reduce the volume of the capacitor per unit capacity, so film capacitors are easier to make into small and large-capacity capacitors.

[0003] The films used in metallized film capacitors include polyethylene, polypropylene, polycarbonate, etc. Metallized film capacitors have a so-called self-healing effect, that is, if a small part of the electrode causes a short circuit due to the fragility of the dielectric medium, the electrode metal around the short-circuited part will cause a larger area to melt and evaporate due to the static energy or short-circuit current carried by the capacitor at that time, thereby restoring insulation and restoring the capacitor's function as a capacitor again.

[0004] In the prior art, when evaporating the film of the metallized film capacitor, the film coil needs to be conveyed by a roller, and the film is evaporated during the continuous conveying process. During the process, the film needs to be straightened, but the existing equipment cannot control the tension of the film, resulting in the film being easily stretched and deformed during the winding process. After coating, the film is cooled or elastically shrinks, which makes the coating easily damaged, thereby affecting the quality of the capacitor. Summary of the invention

[0005] In order to solve the technical problems existing in the background technology, the present invention provides a coating device for producing capacitor metallized film.

[0006] The present invention provides a coating device for producing capacitor metallized film, comprising a coating chamber, a driving chamber and a vapor deposition generating device; a film material roller, a winding roller, a coating guide roller and a plurality of guide rollers are rotatably installed in the coating chamber, a film coil is mounted on the film material roller, the film passes around the coating guide roller and the plurality of guide rollers and is connected to the winding roller;

[0007] The driving chamber is arranged at one side of the coating chamber, and one end of the film material roller, winding roller, coating guide roller and multiple guide rollers pass through the coating chamber from one side to the driving chamber, and the film material roller, winding roller, coating guide roller and multiple guide rollers are located in the driving chamber and are connected through a transmission belt coil transmission. A first motor and a second motor are installed in the driving chamber, and the output shaft of the first motor is connected to one end of the film material roller located in the driving chamber through a clutch, and the output shaft of the second motor is connected to one end of the winding roller located in the driving chamber through a clutch; when the winding speed of the film is the same as the winding speed of the transmission belt, the film is straightened but not tightened, and the transmission tension can be borne by the transmission belt to prevent the film from being deformed;

[0008] The evaporation generating device is arranged in the coating chamber. The evaporation generating device includes an evaporation plate, a heater and a consumable feeding system. The evaporation plate is connected to the heater. The consumable feeding system is used to inject coating consumables onto the evaporation plate. An evaporation port is provided directly above the evaporation plate of the evaporation generating device, and the evaporation port is arranged directly below the coating guide roller.

[0009] Preferably, the coating chamber is connected to the vacuum system through an exhaust pipeline.

[0010] Preferably, the clutch is an electromagnetic clutch.

[0011] Preferably, a loading port is provided on one side wall of the coating chamber, and a hatch is installed at the loading port. A first shaft seat and a second shaft seat are provided on the inner side of the hatch. When the hatch is closed, the first shaft seat can cooperate with one end of the film material roller and the second shaft seat can cooperate with one end of the winding roller. When the hatch is opened, the first shaft seat is separated from the film material roller and the second shaft seat is separated from the winding roller.

[0012] Preferably, a guide rail is fixedly installed on the inner side of the loading port, the guide rail is parallel to the axis of the film material roller, a slider is slidably installed on the guide rail, a hinge seat is fixed on an edge of the inner side of the cabin door, and the cabin door is hinged to the slider through the hinge seat, and a door lock is installed on the cabin door.

[0013] Preferably, the cabin door is also provided with an observation window.

[0014] Preferably, the evaporation generating device further comprises a baffle cover which is slidably mounted at the evaporation port, and the baffle cover is connected to a pneumatic push rod which is used to drive the baffle cover to selectively close or open the evaporation port.

[0015] Beneficial effects:

[0016] In the present invention, the coating device conveys the film through the film material roller, the winding roller, the coating guide roller and the guide roller, and the film is evaporated through the evaporation generating device. The film material roller, the winding roller, the coating guide roller and the guide roller are connected by the transmission belt coil transmission, and the transmission belt and the film are wound in the same way. When working, the diameter and the number of winding turns of the film coil can be the same as those of the transmission belt coil, so that the film and the transmission belt have the same winding speed. At this time, the film is straightened but not tightened, and the transmission belt can replace the film to play the role of transmission and bearing tension, so that the film will not be deformed by tension, thereby improving the coating effect of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A cross-sectional view from a front view of a coating device for producing a capacitor metallized film proposed in an embodiment;

[0018] Figure 2 is a cross-sectional view of the coating chamber from a side view perspective;

[0019] Figure 3 is a cross-sectional view of the drive chamber from a side perspective;

[0020] Figure 4 This is a schematic diagram of the installation of the hatch at the loading port of the coating chamber. DETAILED DESCRIPTION

[0021] Please refer to Figure 1-4 As shown, a coating device for producing capacitor metallized film according to an embodiment of the present invention comprises a coating chamber 1, a driving chamber 2 and a vapor deposition generating device 3. A film material roller 4, a winding roller 5, a coating guide roller 6 and a plurality of guide rollers 7 are rotatably installed in the coating chamber 1. A film 8 coil is mounted on the film material roller 4. The film 8 passes over the coating guide roller 6 and the plurality of guide rollers 7 and is connected to the winding roller 5. Specifically, the film 8 can refer to but is not limited to Figure 2 The winding method in this example has two guide rollers 7, the film material roller 4 is located below the winding roller 5, and the film 8 on the film material roller 4 bypasses the bottom of the coating guide roller 6 and is connected to the winding roller 5 upward.

[0022] The evaporation generating device 3 is arranged in the coating chamber 1, and the evaporation generating device 3 includes an evaporation plate 301, a heater 302 and a consumable feeding system 303. The evaporation plate 301 is connected to the heater 302. The consumable feeding system 303 is used to inject coating consumables onto the evaporation plate 301. A evaporation port 304 is provided directly above the evaporation plate 301 of the evaporation generating device 3, and the evaporation port 304 is arranged directly below the coating guide roller 6.

[0023] During operation, the film 8 passes through the bottom of the coating guide roller 6, that is, above the evaporation port 304. The coating consumables on the evaporation plate 301 are heated by the heater 302 and evaporated, and are plated to the surface of the film 8. When the film 8 is completely rolled up onto the winding roller 5, the coating process is completed.

[0024] The driving chamber 2 of the coating device is arranged at one side of the coating chamber 1, and one end of the film material roller 4, the winding roller 5, the coating guide roller 6 and the plurality of guide rollers 7 pass through the coating chamber 1 to the driving chamber 2, and the film material roller 4, the winding roller 5, the coating guide roller 6 and the plurality of guide rollers 7 are located in the driving chamber 2 through the transmission belt 9. The first motor 10 and the second motor 11 are installed in the driving chamber 2. The output shaft of the first motor 10 is connected to the end of the film material roller 4 located in the driving chamber 2 through the clutch 12, and the output shaft of the second motor 11 is connected to the end of the winding roller 5 located in the driving chamber 2 through the clutch 12. The clutch 12 preferably adopts an electromagnetic clutch 12, which can be connected to a controller for automatic control. When the winding speed of the film 8 is the same as the winding speed of the transmission belt 9, the film 8 is straightened but not tightened, and the transmission tension can be borne by the transmission belt 9 to prevent the film 8 from deforming.

[0025] According to the coating device of this embodiment, when working, the diameter and the number of winding turns of the film 8 on the film roller 4 are the same as the diameter and the number of winding turns of the transmission belt 9, and the film 8 and the transmission belt 9 are wound in the same way. At the same time, the film 8 is in a straightened but not tightened state, and the transmission belt 9 is in a tightened state. At this time, the first motor 10 is disconnected from the film roller 4 through the clutch 12, and the second motor 11 is started to work. The second motor 11 drives the winding roller 5 to rotate and rewind the transmission belt 9 and the film 8. Since the transmission belt 9 is tightened, the transmission belt 9 will first bear the transmission tension to drive the film roller 4 to rotate. Because the film 8 and the transmission belt 9 have the same degree of winding, the film 8 always has the same winding speed as the transmission belt 9 during the winding process. Therefore, during the entire winding process, the film 8 can always be free from the transmission tension, thereby preventing the film 8 from being deformed, thereby improving the coating effect and preventing the coating from failing.

[0026] After completing one coating operation and before the next coating operation, the coating device can disconnect the second motor 11 from the winding roller 5 through the clutch 12 and start the first motor 10 to rewind the transmission belt 9 onto the film material roller 4.

[0027] In a further embodiment, in order to prevent air from interfering with the coating, the coating chamber 1 is connected to a vacuum system through an exhaust pipe 21. The vacuum system generally includes a vacuum pump, a Roots pump and a connecting valve. The coating chamber 1 can be vacuumed through the exhaust pipe 21. In addition, an inert protective gas such as argon can be delivered to the coating chamber 1 through a protective gas delivery system.

[0028] Reference Figure 4 In a further embodiment, a loading port 101 is provided on one side wall of the coating chamber 1, and a hatch 13 is installed at the loading port 101. A first shaft seat 14 and a second shaft seat 15 are provided on the inner side of the hatch 13. When the hatch 13 is closed, the first shaft seat 14 can cooperate with one end of the film material roller 4 and the second shaft seat 15 can cooperate with one end of the winding roller 5. When the hatch 13 is opened, the first shaft seat 14 is separated from the film material roller 4 and the second shaft seat 15 is separated from the winding roller 5.

[0029] According to the hatch 13 of the present embodiment, when the hatch 13 is opened, it is convenient to install the film 8 coil on the film material roll 4 and the winding roll 5, thereby facilitating the loading and unloading of the film 8 coil.

[0030] The specific installation method of the hatch 13 is as follows: a guide rail 16 is fixedly installed on the inner side of the loading port 101, the guide rail 16 is axially parallel to the film material roller 4, a slider 17 is slidably installed on the guide rail 16, a hinge seat 18 is fixed to an edge of the inner side of the hatch 13, and the hatch 13 is hinged to the slider 17 through the hinge seat 18, and a door lock 19 is installed on the hatch 13.

[0031] When opening the hatch 13 installed in the above manner, it is necessary to first open the door lock 19 and pull the hatch 13 outward. During the process, the slider 17 will slide outward along the guide rail 16. After sliding for a certain distance, the first shaft seat 14 is separated from the film material roller 4 and the second shaft seat 15 is separated from the winding roller 5. At this time, the hinge seat 18 also moves to the outside of the loading port 101, and the hatch 13 can be rotated outward again, so that the hatch 13 is fully opened. When the hatch 13 is closed, the hinge seat 18 is located on the inside of the loading port 101, and the hatch 13 and the loading port 101 are tightly matched. The hatch 13 installed in this way can facilitate loading and unloading, and can also prevent the film material roller 4 and the winding roller 5 from axial deviation, thereby ensuring installation accuracy.

[0032] In some embodiments, an observation window 20 is further provided on the hatch 13 , and the observation window 20 is convenient for observing the working conditions in the coating chamber 1 .

[0033] In a further embodiment, the evaporation device 3 further includes a baffle 305, which is slidably mounted at the evaporation port 304, and the baffle 305 is connected to a pneumatic push rod 306, which is fixed to the outer shell of the evaporation device 3, and the pneumatic push rod 306 is used to drive the baffle 305 to selectively close or open the evaporation port 304. When the evaporation work is in progress, the baffle 305 can be controlled by the pneumatic push rod 306 to open the evaporation port 304, and after the evaporation work is completed, the evaporation port 304 can be closed, so that the evaporation can be stopped immediately, which can protect the film 8 and prevent uneven coating thickness.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A coating device for producing capacitor metallized film, characterized in that: The invention comprises a coating chamber (1), a driving chamber (2) and a vapor deposition generating device (3); a film material roller (4), a winding roller (5), a coating guide roller (6) and a plurality of guide rollers (7) are rotatably mounted in the coating chamber (1); a film (8) coil is mounted on the film material roller (4); the film (8) passes over the coating guide roller (6) and the plurality of guide rollers (7) and is connected to the winding roller (5); The drive chamber (2) is arranged on one side of the coating chamber (1); one end of the film material roller (4), the winding roller (5), the coating guide roller (6) and the plurality of guide rollers (7) pass through one side of the coating chamber (1) into the drive chamber (2); and the film material roller (4), the winding roller (5), the coating guide roller (6) and the plurality of guide rollers (7) located in the drive chamber (2) are connected to the film material roller (4) through a transmission belt (9) for coil transmission; a first motor (10) and a second motor (11) are installed in the drive chamber (2); an output shaft of the first motor (10) is connected to the film material roller (4) through a clutch (12). The output shaft of the second motor (11) is connected to one end of the winding roller (5) located in the driving chamber (2) through a clutch (12); the diameter and number of winding turns of the film (8) on the film material roller (4) are the same as the diameter and number of winding turns of the transmission belt (9), and the film (8) and the transmission belt (9) are wound in the same manner, and the winding speed of the film (8) is the same as the winding speed of the transmission belt (9), so that the film (8) is straightened but not tightened, and the transmission tension can be borne by the transmission belt (9) to prevent the film (8) from being deformed; The evaporation generating device (3) is arranged in the coating chamber (1), the evaporation generating device (3) comprises an evaporation plate (301), a heater (302) and a consumable material feeding system (303), the evaporation plate (301) is connected to the heater (302), the consumable material feeding system (303) is used to inject coating consumable material onto the evaporation plate (301), and a evaporation port (304) is arranged directly above the evaporation plate (301) of the evaporation generating device (3), and the evaporation port (304) is arranged directly below the coating guide roller (6); A loading port (101) is provided on one side wall of the coating chamber (1), and a hatch (13) is installed in cooperation with the loading port (101). A first shaft seat (14) and a second shaft seat (15) are provided on the inner side of the hatch (13). When the hatch (13) is closed, the first shaft seat (14) can cooperate with one end of the film material roller (4) and the second shaft seat (15) can cooperate with one end of the winding roller (5). When the hatch (13) is opened, the first shaft seat (14) is separated from the film material roller (4) and the second shaft seat (15) is separated from the winding roller (5). A guide rail (16) is fixedly installed on the inner side of the loading port (101), the guide rail (16) is parallel to the axis of the film material roller (4), a slider (17) is slidably installed on the guide rail (16), a hinge seat (18) is fixed on an edge of the inner side of the cabin door (13), and the cabin door (13) is hinged to the slider (17) via the hinge seat (18), and a door lock (19) is installed on the cabin door (13); The evaporation generating device (3) further comprises a blocking cover (305), wherein the blocking cover (305) is slidably mounted at the evaporation port (304), and the blocking cover (305) is connected to a pneumatic push rod (306), and the pneumatic push rod (306) is used to drive the blocking cover (305) to selectively close or open the evaporation port (304).

2. The coating device for producing capacitor metallized film according to claim 1, characterized in that: The coating chamber (1) is connected to the vacuum system via an exhaust pipeline (21).

3. The coating device for producing capacitor metallized film according to claim 1, characterized in that: The clutch (12) is an electromagnetic clutch (12).

4. The coating device for producing capacitor metallized film according to claim 1, characterized in that: The cabin door (13) is also provided with an observation window (20).

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