JPS6265315A - Manufacturing laminated film capacitor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for manufacturing a laminated film capacitor.

[Technical previous invention and its problems] In general, the manufacturing method of a multilayer film capacitor is as follows:
A mother element made by winding a pair of metallized films around a drum and forming metallized electrodes on both end faces is removed from the drum and cut into the required size in the radial direction with a rotating saw blade to form one medium element. That's what I do. However, in the manufacturing method having the above-mentioned structure, only one base element is formed for the metal electrode formation 1'li7 on the drum. A method has been adopted in which capacitors can be manufactured more efficiently by forming individual capacitors. In other words, the outline of the technology disclosed in the publication is as shown in FIG.
Using a pair of metallized films (22) provided with
A plurality of metalized film strips (24) formed by slitting 2) in the width direction are laminated in pairs and wound around one wide drum (25) as shown in FIG.
As shown in Figure 0, a plurality of rings (2
G) was also formed by converting the HA number shilling 26) into a drum (2
5) Separate the plurality of rings (26) from each other and form a plurality of mother elements by forming poles on the metallicon '1 on both end faces of each, and then cut each mother element in the radial direction using, for example, a saw blade. In this case, an intermediate element is obtained. However, according to the manufacturing method having the above-mentioned structure, as shown in FIG. I! of a number of interleaved metallized film strips upon separation into individual rings (21). Separation is difficult with im, and the U state is often destroyed by the stress during separation. For this reason, it has been suggested that an adhesive be applied to the film surface for fixation, but the adhesive layer cannot be made in such a compact manner, and the capacitor itself becomes a doll. Especially if the film is A, such as 1.5μ or 2.0μ? The result is that the original thinness of the film cannot be maintained. In addition, it is difficult to achieve precision in adhesive application,
There were 120 problems that needed to be solved in practice, such as adhesive protruding from the end face and causing poor tan δ characteristics due to incomplete connection with the metallicon electrode.

CObject of the Invention j The present invention has been made in view of the above points, and provides for the manufacture of a highly practical v41iI type film capacitor that is easy to work with, does not hinder miniaturization, and has no defective tan δ characteristics. The purpose is to provide a method.

[Summary of the Invention] The method for manufacturing a laminated film capacitor of the present invention includes a metallized film provided with a plurality of margin parts in the width direction supplied from each of a pair of supply rolls, and a metallized film provided with a plurality of margin parts in the width direction, which is supplied from each of a pair of supply rolls.
At the boundary of the metal layer or at a position where it enters the metal layer, it is wound and laminated on multiple drums while making multiple slits in the width direction. This is characterized in that the wound laminated ring is formed so as to be separated by J.

Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. That is, as shown in FIG. 2, a metallized film (3) with a plurality of margin parts (1) formed in the width direction and a vapor-deposited gold RIA layer (2) formed thereon is placed between a pair of supply rolls (as shown in FIG. 1). 4) The metallized film (3) is supplied from (5), and in the middle of winding, the metallized film (3) is cut with a razor blade, for example, in the width direction so that a margin part (1) is formed at one end as shown in FIG. (6) to form a plurality of metalized film strips (7), and the plurality of metalized film strips (7) supplied from each of the supply rolls (4H5) are matched with each other to form a wide width. The drums (8) and (9) are alternately wound and laminated as shown in Figures 4 and 5.
(9) forming a plurality of wound laminated rings (1o) on each of the tops, such that the rings (1o) are separated by a spacing not less than the width of said metallized film strip; After removing from the drums (8) and (9), metallicon electrodes (11) are formed on both end surfaces of each ring (10) as shown in FIG. 6 to form a mother element (12). is cut into the required size in the radial direction. In the figure (13) is the inner winding layer, (14
) is the outer ridge layer.

ff! configured as above! According to the manufacturing method of Ill type film capacitor, a plurality of wound laminated rings (1
0) are separated from the drums (8) and (9) by metalized film strips (7) or more at intervals of the width of the straight-wound laminated rings (10), so they can be easily removed from the drums (8N9). One turn laminated ring (10) can be easily obtained, no special separation stress is required to make a single laminated ring (10), and the laminated state will not be destroyed. Therefore, there is no need for an adhesive layer to fix the laminated state even when separation stress is applied, and the size can be significantly smaller than that obtained by the @l manufacturing method shown in the conventional reference example. There is no risk of the ring protruding to the end face of the wound laminated ring (10), which has the advantage of eliminating the cause of poor tan δ characteristics.

Next, we will discuss the tan δ defective rate and volume comparison between the present invention (Al) and the conventional reference example (B) illustrated in FIGS. Rated 83V made using metallized polyester film with metal layer formed
DC 1.0 μF multilayer fillem capacitor (8)
As a result of investigating the tan δ defective rate and volume comparison based on the difference between and (B), the results are shown in the table.

In this case, the thickness of the adhesive layer in (B) was set to 1 μm/layer, or in (A) (both B1 and B1, a polyester film with a thickness of 25 μm was used for the inner cavity Ill and the outer spiral layer).

As is clear from the table above, present invention (A) 1 and reference example (B)
), we have demonstrated the superior effect of significantly reducing the tan δ defective rate and at the same time reducing the volume ratio to less than 1/2.

Although the above embodiments have been described using two drums as an example, the present invention is not limited to this, and it goes without saying that two or more drums may be used as necessary.
Furthermore, although the above embodiments have been described using a razor blade as an example of the means for slitting the metallized film into the metalized film strip, it goes without saying that means such as a laser cutter may also be used.

[Effects of the Invention] According to the present invention, it is possible to greatly contribute to the stable miniaturization of the tan δ characteristics without destroying the la layer state of the wound laminated ring, and to greatly improve the work efficiency. You can learn how to manufacture film capacitors.

[Brief explanation of drawings]

1 to 5 relate to one embodiment of the present invention, FIG. 1 is a schematic diagram of a manufacturing method, FIG. 2 is a partially cutaway plan view showing a metallized film, and FIG. A plan view showing the state in which the slit portion of the metallized film is taken out, Fig. 4 is a schematic explanatory drawing to make the manufacturing method easier to understand, and Fig. 5 is a plan view to make it easier to understand the state of formation of the laminated ring on the drum. Fig. 9 is an enlarged partial cross-sectional view of Harbor and Rollo, Fig. 6 is a perspective view showing the mother element, Figs. 8 is a plan view showing the state of slits in the metallized film, FIG. 9 is a schematic diagram of the manufacturing method, and FIG. 10 is a plan view of FIG. ,
FIG. 11 is an enlarged partial sectional view of the harbor of FIG. (1)...Margin part, (3)...Metalized film. (4) (5)...supply roll, (7)...metalized film strip. (8) (9)...Drum, (10)...
・Wound laminated ring. (11)... Metallicon electrode, (12)...
...Mother device patent applicant Marukon Electronics Co., Ltd. 13vlJ C Tomi

Claims (1)

[Claims] means for slitting the metallized film provided with a plurality of margin portions in the width direction supplied from each of the pair of supply rolls in the width direction so that the margin portion is formed at one end to form a plurality of metallized film strips; , a plurality of metallized film strips fed from one feed roll and a plurality of metallized film strips fed from the other feed roll are wound in pairs on at least two drums alternately; means for laminating a plurality of wound laminated rings on said drum, each separated by a distance equal to or greater than said metallized film strip; said wound laminated ring being removed from said drum to form metallicon electrodes on both end surfaces; 1. A method for manufacturing a multilayer film capacitor, comprising: means for cutting the mother element into a mother element; and means for cutting the mother element in a radial direction to obtain a capacitor element.