Metallized film heat setting device

Abstract

The utility model belongs to the technical field of metallized polypropylene film production, and particularly relates to a metallized film heat setting device which comprises a drying oven, a plurality of driven rollers which are rotationally connected are transversely arranged in a working bin of the drying oven, and the driven rollers are arranged at intervals in the depth direction of the working bin of the drying oven. A transversely-arranged driving roller is further rotationally connected between the driven rollers arranged at intervals, and a driving mechanism arranged on the drying oven can drive the driving roller to rotate in the same direction. According to the utility model, the driving mechanism arranged on the drying oven drives the driving roller arranged between the driven rollers to rotate, so that when a capacitor core body formed by winding a metalized polypropylene film is erected between the driven rollers and the driving roller, the capacitor core body can be subjected to heat setting while rotating through the rotation of the driving roller; therefore, the heating uniformity of the capacitor core can be effectively improved, and the production quality of the capacitor core can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of metallized polypropylene film production technology, specifically relating to a heat setting device for metallized films. Background Technology

[0002] Metallized polypropylene film is a composite material formed by depositing an extremely thin metal layer, such as aluminum or zinc-aluminum, onto the surface of polypropylene film through a special process.

[0003] During the production of metallized polypropylene film, heat setting is usually required. After the metallized polypropylene film is wound into a capacitor core, heat setting can utilize the thermal shrinkage of the polypropylene film in the longitudinal and transverse directions during the heating process to squeeze out the air remaining between the dielectric layers and evaporate the moisture attached to the core, thereby improving the tightness of the capacitor element and thus improving the stability of the capacitor performance.

[0004] For heat setting of metallized polypropylene films, oven heating or infrared heating methods are commonly used. Specifically, for the oven heating method, the metallized polypropylene film is wound into a capacitor core and then placed in an oven with a forced airflow. First, the temperature is raised to 70°C for 0.5 hours and held for 1 hour; then the temperature is raised to 90°C for 0.5 hours and held for 1 hour; next, the temperature is raised to 100°C for 0.5 hours and held for 12 hours; finally, the temperature is lowered and cooled for 0.5 hours before being removed.

[0005] However, most current ovens have fixed shelves inside the working chamber. By placing the wound capacitor core on the shelf and using hot air from bottom to top to heat-set the capacitor core, uneven heating between the bottom and top of the capacitor core is caused, which in turn affects the quality of the capacitor core.

[0006] In view of this, the present invention provides a heat-setting device for metallized thin films to solve the above problems. Utility Model Content

[0007] To achieve the above objectives, the present invention provides the following technical solution: a heat-setting device for metallized thin films, comprising an oven, wherein a plurality of driven rollers are rotatably connected in a transverse manner inside the working chamber of the oven, the driven rollers are spaced apart along the depth direction of the working chamber of the oven, and a transversely arranged driving roller is rotatably connected between the spaced driven rollers, and a driving mechanism provided on the oven can drive the driving rollers to rotate in the same direction.

[0008] In a preferred embodiment of the metallized thin film heat setting device of this utility model, the driven roller is provided with bearings at both ends, and the driven roller is laterally rotatably connected to the working chamber of the oven through the bearings.

[0009] As a preferred embodiment of the metallized thin film heat setting device of this utility model, the active roller includes a roller body and a worm gear axially connected to one end of the roller body.

[0010] As a preferred embodiment of the metallized thin film heat setting device of this utility model, the roller body is provided with bearings at both ends, and the roller body is laterally rotatably connected to the working chamber of the oven through the bearings.

[0011] In a preferred embodiment of the metallized thin film heat setting device of this utility model, the driving mechanism includes a driving member installed on the back of the oven, the output end of the driving member extending into the interior of the working chamber of the oven along the depth direction of the working chamber, and the output end of the driving member being axially connected to a worm gear capable of meshing with the worm wheel inside the working chamber of the oven.

[0012] In a preferred embodiment of the metallized thin film heat setting device of this utility model, the end of the worm gear away from the driving component is rotatably connected to a support block with one end fixed to the inner wall of the working chamber of the oven.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention uses a drive mechanism mounted on an oven to rotate an active roller positioned between the driven rollers. When the capacitor core, formed by winding a metallized polypropylene film, is placed between the driven and active rollers, the rotation of the active roller allows the capacitor core to be heat-set while rotating, thereby effectively improving the uniformity of heating of the capacitor core and thus enhancing its production quality. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the main structure of the oven of this utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the working chamber of the oven according to this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the working chamber of the oven according to this utility model.

[0019] Figure 4 This is a top view of the internal structure of the working chamber of the oven according to this utility model.

[0020] Figure 5 This is a schematic diagram of the drive mechanism structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the active roller structure of this utility model.

[0022] In the diagram: 1. Oven; 2. Driven roller; 3. Driven roller; 31. Roller body; 32. Worm gear; 14. Drive component; 15. Worm; 16. Support block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model relates to a heat-setting device for metallized thin films, such as... Figures 1-3 As shown, the oven includes a forced-air drying oven 1. Several driven rollers 2 are arranged horizontally inside the working chamber of the forced-air drying oven 1. The number of driven rollers 2 can be adjusted according to the actual size of the working chamber inside the forced-air drying oven 1. The two ends of the driven rollers 2 are rotatably connected to the inner walls of the working chamber of the forced-air drying oven 1 through bearings. The driven rollers 2 are arranged side by side and spaced apart along the depth direction of the working chamber of the drying oven 1. A horizontally arranged driving roller 3 is also rotatably connected between the spaced driven rollers 2. The driving mechanism on the drying oven 1 can drive the driving roller 3 to rotate in the same direction.

[0025] Specifically, such as Figures 5-6 As shown, the drive roller 3 includes a roller body 31 and a worm gear 32 axially connected to one end of the roller body 31. Both ends of the roller body 31 are rotatably connected to the interior of the working chamber of the drying oven 1 via bearings. Wherein, as... Figures 4-5 As shown, the drive mechanism includes a drive member 14 mounted on the back of the oven 1. The output end of the drive member 14 extends into the working chamber of the oven 1 along the depth direction of the working chamber. The output end of the drive member 14 is axially connected to a worm 15 that can mesh with the worm gear 32 inside the working chamber of the oven 1.

[0026] In this embodiment, taking the drive unit 14 as a motor as an example, when the motor is controlled to rotate, its output end can drive the worm 15 to rotate. Due to the meshing between the worm 15 and the worm wheel 32, when the worm 15 rotates, it can drive the worm wheel 32 to rotate, and finally drive the drive roller 3 to make a circular motion along its axis. When the capacitor core formed by the metallized polypropylene film is placed at the top gap between the driven roller 2 and the drive roller 3, the rotatable setting of the drive roller 3 and the driven roller 2 makes the wound capacitor core itself make a circular motion, so as to fully contact the hot air in the oven 1 and improve the heat uniformity.

[0027] Furthermore, in order to improve the stability of the worm 15, a support block 16 can be fixed to the inner wall of one side of the working chamber of the oven 1. The end of the worm 15 in the extension direction is rotatably connected to the fixed support block 16 through a bearing, so as to position the extension end of the worm 15 through the support block 16, thereby reducing its deflection during long-term force driving.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A metalized film heat setting device comprising an oven (1), characterized in that: The working chamber of the oven (1) is internally provided with a plurality of driving rollers (2) connected in rotation, which are arranged at intervals along the depth direction of the working chamber of the oven (1), and a driving roller (3) connected in rotation is further arranged between the driving rollers (2) arranged at intervals, and a driving mechanism arranged on the oven (1) can drive the driving roller (3) to rotate in the same direction.

2. The metalized film heat setting device of claim 1, wherein: Both ends of the driving roller (2) are provided with bearings, and the driving roller (2) is connected in rotation in the working chamber of the oven (1) through the bearings.

3. The metalized film heat setting device of claim 1, wherein: The driving roller (3) comprises a roller body (31) and a worm wheel (32) connected in rotation at one end of the roller body (31).

4. The metalized film heat setting device of claim 3, wherein: Both ends of the roller body (31) are provided with bearings, and the roller body (31) is connected in rotation in the working chamber of the oven (1) through the bearings.

5. The metalized film heat setting device of claim 3 or 4, wherein: The driving mechanism comprises a driving member (14) mounted on the back of the oven (1), the output end of the driving member (14) extends into the working chamber of the oven (1) along the depth direction of the working chamber of the oven (1), and the output end of the driving member (14) is axially connected with a worm (15) capable of engaging with the worm wheel (32) in the working chamber of the oven (1).

6. The metalized film heat setting device of claim 5, wherein: The end of the worm (15) away from the driving member (14) is rotatably connected with a support block (16) fixed at the inner wall of the working chamber of the oven (1).

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