JPH059932B2 - - Google Patents
Info
- Publication number
- JPH059932B2 JPH059932B2 JP6772488A JP6772488A JPH059932B2 JP H059932 B2 JPH059932 B2 JP H059932B2 JP 6772488 A JP6772488 A JP 6772488A JP 6772488 A JP6772488 A JP 6772488A JP H059932 B2 JPH059932 B2 JP H059932B2
- Authority
- JP
- Japan
- Prior art keywords
- opening
- electrolytic capacitor
- sealing
- case
- mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 claims description 25
- 239000003990 capacitor Substances 0.000 claims description 17
- 238000000465 moulding Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000002788 crimping Methods 0.000 description 4
- 230000003811 curling process Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、長円形などの非真円の開口形状を
持つ外装ケースを用いた電解コンデンサの封口方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of sealing an electrolytic capacitor using an exterior case having a non-perfect circular opening shape such as an oval shape.
一般に、電解コンデンサの外装ケースは、コイ
ン状のアルミニウム片を成形型に入れて加圧成形
することにより、底部および周壁部からなる筒状
体に形成される。このような成形加工は、開口形
状が円形のみならず、加工の容易性から長円形な
どの非真円の場合にも踏襲されている。
Generally, the exterior case of an electrolytic capacitor is formed into a cylindrical body consisting of a bottom portion and a peripheral wall portion by placing a coin-shaped aluminum piece in a mold and press-molding it. Such a forming process is followed not only when the opening shape is circular, but also when the opening shape is non-perfect circular, such as an oval shape, because of the ease of processing.
そして、成形型は外装ケースの形状に合わせ、
たとえば、長円筒である場合には、その形状に合
致した成形型が用いられるが、型抜きを容易にす
るため、クリアランスが設けられている。このた
め、第６図のＡに示すように、成形によつて得ら
れた外装ケース２には、本来の容器部分となる胴
部より開口面積が大きい相似形のクリアランス部
４が形成される。このクリアランス部４は、加工
の便宜上形成されるものであり、外装ケース２の
本来の機能からすれば不要なものであるから、第
６図のＢに一点鎖線で示す部分で切断される。こ
の切断加工は、ａからｂ方向に向かつて行われる
ため、第６図のＣに示すように、切断端部にバリ
６が生じることになる。しかも、切断面を外装ケ
ース２の胴部に連続して設定することは、切断刃
の厚さなどの関係から困難であり、外装ケース２
の端部はクリアランス部４の一部を残し、その
上、外周側縁端部にバリ６が形成されることにな
り、開口部は非常に複雑な形態となる。 The mold is then molded to match the shape of the outer case.
For example, in the case of an elongated cylinder, a mold that matches the shape is used, but a clearance is provided to facilitate mold removal. Therefore, as shown in FIG. 6A, the exterior case 2 obtained by molding is formed with a clearance portion 4 having a similar shape and having a larger opening area than the body portion which is the original container portion. This clearance portion 4 is formed for the convenience of processing and is unnecessary in view of the original function of the outer case 2, so it is cut at the portion indicated by the dashed line B in FIG. 6. Since this cutting process is performed in the direction from a to b, a burr 6 is generated at the cut end, as shown in C in FIG. Moreover, it is difficult to set the cutting surface continuously on the body of the outer case 2 due to the thickness of the cutting blade, etc.
A portion of the clearance portion 4 remains at the end of the opening, and in addition, a burr 6 is formed at the outer peripheral edge, resulting in a very complicated opening.
このような外装ケース２を用いて封口部材の上
面側にカーリング処理が施されると、その開口形
状が平坦部と湾曲部とを連続的に持つ長円形では
局部的に曲率が異なる上に、縁端部に生じている
バリ６が成形型の成形面における移動を妨げるな
ど、カーリング処理に対する開口縁部の曲げ応力
が周縁の各部で大きく相違し、封口処理を施した
外装ケース２の開口部分に割れや形状の歪みなど
を伴い、封口精度が低下して製品としての品位が
低下することがあつた。実験によれば、長円形の
外装ケースでは、平坦部８ａ側がカーリング処理
に対する応力が大きく、割れなどを生じることが
確認されている。
When curling processing is performed on the upper surface side of the sealing member using such an exterior case 2, the opening shape is an oval shape having a continuous flat part and a curved part, and the curvature differs locally. The bending stress of the opening edge due to the curling process differs greatly at each part of the periphery, such as the burr 6 generated at the edge preventing movement on the molding surface of the mold, and the opening part of the exterior case 2 has been sealed. This resulted in cracks and shape distortions, resulting in a decrease in sealing accuracy and a deterioration in product quality. According to experiments, it has been confirmed that in the case of an oval outer case, the stress on the flat portion 8a side during the curling process is large, causing cracks and the like.
そこで、この発明は、このような長円形などの
非真円の外装ケースを用いた電解コンデンサの封
口について、外装ケースの割れや歪みなどを防止
し、封口精度を高めた電解コンデンサの封口方法
の提供を目的とする。 Therefore, the present invention aims to provide a method for sealing an electrolytic capacitor using a non-round outer case such as an oval shape, which prevents cracking or distortion of the outer case and improves sealing accuracy. For the purpose of providing.
この発明の電解コンデンサの封口方法は、第１
図に示すように、非真円の筒状を成す外装ケース
２のクリアランス部４を切断し、開口部の平坦部
８ａ側縁部にプレス加工によつて被案内部１０を
形成し、電解コンデンサ素子１２を収容するとと
もに、開口部に封口部材１４を挿入した外装ケー
ス２の開口縁部に、外装ケース２の開口縁部に合
致する案内面２４，２６とともに成形面２８を持
つ成形型２２を以て加締め加工を行うことを内容
とする。
The method for sealing an electrolytic capacitor of the present invention is as follows:
As shown in the figure, the clearance part 4 of the outer case 2, which has a non-perfect circular cylindrical shape, is cut and a guided part 10 is formed by press working on the side edge of the flat part 8a of the opening. A mold 22 having a molding surface 28 as well as guide surfaces 24 and 26 that match the opening edges of the exterior case 2 is attached to the opening edge of the exterior case 2 which houses the element 12 and has the sealing member 14 inserted into the opening. The content is to perform caulking.
そして、この発明の電解コンデンサの封口方法
において、平坦部８ａ側縁部に形成した被案内部
１０は、第１図、第４図および第５図に示すよう
に、外装ケース２の外周側、肉厚内または内周側
を頂部とした傾斜面で構成される。 In the electrolytic capacitor sealing method of the present invention, the guided portion 10 formed on the side edge of the flat portion 8a is formed on the outer peripheral side of the outer case 2, as shown in FIGS. 1, 4, and 5. Consists of an inclined surface with the top inside the wall thickness or on the inner circumferential side.
形成された外装ケース２の開口側のクリアラン
ス部４を切断し、開口部の平坦部８ａ側縁部にプ
レス加工によつて被案内部１０を形成したものを
外装ケース２とし、この外装ケース２に電解コン
デンサ素子１２の収容および封口部材１４を挿入
した後、外装ケース２の開口縁部に合致する案内
面２４、２６とともに、加締め加工に必要な形面
２８を持つ成形型２２を以て加締め加工すると、
開口部の平坦部８ａ側縁部の被案内部１０が、案
内面２４、２６に沿つて成形面２８に案内される
結果、クリアランス部４およびバリ６の影響を受
けることなく、成形面２８における開口縁部の湾
曲成形が開口縁部の曲率に無関係に一様に行われ
る。
The exterior case 2 is obtained by cutting the clearance portion 4 on the opening side of the formed exterior case 2 and forming a guided portion 10 on the side edge of the flat portion 8a of the opening by press working. After accommodating the electrolytic capacitor element 12 and inserting the sealing member 14, it is crimped using a mold 22 having a shaped surface 28 necessary for crimping, as well as guide surfaces 24 and 26 that match the opening edge of the outer case 2. When processed,
As a result of the guided portion 10 on the side edge of the flat portion 8a of the opening being guided to the molding surface 28 along the guide surfaces 24 and 26, the portion on the molding surface 28 is not affected by the clearance portion 4 and the burr 6. The opening edge is uniformly curved regardless of the curvature of the opening edge.
そして、外装ケース２の平坦部８ａ側縁部の被
案内部１０は、外装ケース２の外周側、肉厚内ま
たは内周側に頂部を持つ傾斜面とすれば、外装ケ
ース２の開口縁部が湾曲部８ｂ側および平坦部８
ａ側の曲率の有無ないしその程度に関係なく、一
様な湾曲成形でき、割れや歪みの無い封口精度の
高い加締め加工が実現される。 If the guided portion 10 at the side edge of the flat portion 8a of the exterior case 2 is an inclined surface having a top on the outer circumference side, within the wall thickness, or on the inner circumference side, the guided portion 10 at the side edge of the flat portion 8a of the exterior case 2 is an inclined surface having a top on the outer circumference side, within the wall thickness, or on the inner circumference side. is the curved part 8b side and the flat part 8
Regardless of the presence or absence of curvature on the a side or its degree, uniform curving can be performed, and caulking with high sealing accuracy without cracking or distortion can be realized.
第１図は、この発明の電解コンデンサの封口方
法の実施例を示す。
FIG. 1 shows an embodiment of the method for sealing an electrolytic capacitor according to the present invention.
第１図のＡに示すように、一次形成品としての
外装ケース２からクリアランス部４を切断する
と、外装ケース２の開口部にはクリアランス部４
の一部とともに、バリ６が周縁に沿つて形成され
る。外装ケース２は、たとえば、アルミニウム片
で成形加工されたものであり、開口縁部位の形態
も任意に加工可能である。 As shown in A of FIG.
A burr 6 is formed along the periphery. The exterior case 2 is made of, for example, a piece of aluminum, and the shape of the opening edge portion can be shaped as desired.
そこで、第１図のＢに示すように、平坦部８ａ
側をプレス加工によつて、たとえば、内面側に頂
部を持つて外側に傾斜する被案内部１０を形成す
る。この被案内部１０は、外装ケース２の開口縁
部に平坦部８ａおよび湾曲部８ｂの区別なく全周
囲に亘つて形成してもよい。 Therefore, as shown in B of FIG.
For example, the guided portion 10 having the top on the inner surface and slanting outward is formed by pressing the sides. The guided portion 10 may be formed around the entire periphery of the opening edge of the exterior case 2 without distinguishing between the flat portion 8a and the curved portion 8b.
このように開口縁部が加工された外装ケース２
に対し、第１図のＣに示すように、電解コンデン
サ素子１２を収容した後、開口部に封口部材１４
を挿入する。封口部材１４は、ゴムなどの弾性材
料で外装ケース２の開口形状に合わせて形成され
ている。この封口部材１４には、端子用透孔が設
けられ、電解コンデンサ素子１２から引き出され
た正負電極側のリード１６ａ，１６ｂが貫通して
いる。 Exterior case 2 with the opening edge processed in this way
On the other hand, as shown in FIG.
Insert. The sealing member 14 is made of an elastic material such as rubber and is formed to match the shape of the opening of the outer case 2. This sealing member 14 is provided with a through hole for a terminal, through which leads 16a and 16b on the positive and negative electrode sides drawn out from the electrolytic capacitor element 12 pass.
このように外装ケース２に対し、電解コンデン
サ素子１２が収容され、封口部材１４が挿入され
た（仮封口）後、第１図のＣに示すように、この
仮封口の状態を以て保持型１８に挿入する。保持
型１８には外装ケース２と同形状の凹部２０が形
成されている。この場合、外装ケース２の開口縁
部は、カーリング処理のために必要な長さを封口
部材１４から突出させるとともに、外装ケース２
の開口側を保持型１８から露出させて設定するも
のとする。 After the electrolytic capacitor element 12 is accommodated in the exterior case 2 and the sealing member 14 is inserted (temporary sealing), the holding mold 18 is placed in the temporarily sealed state as shown in C of FIG. insert. A recess 20 having the same shape as the outer case 2 is formed in the holding mold 18 . In this case, the opening edge of the outer case 2 protrudes from the sealing member 14 by a length necessary for the curling process, and the outer case 2
The opening side of the holding mold 18 is exposed from the holding mold 18.
また、成形型２２には、内方に狭くなる擂鉢状
にテーパ面を成す第１の案内面２４、平坦な円筒
面を成す第２の案内面２６および加締め加工に必
要な湾曲面からなる成形面２８が連続して形成さ
れ、中央部分にはリード１６ａ，１６ｂを通過さ
せるための通過孔３０が形成されている。第２図
は、この成形型２２の平面形状を示す。第２の案
内面２６は、外装ケース２の胴部側の形状に合致
し、成形面２８は、外装ケース２の端部のカーリ
ング処理のための湾曲面を成している。なお、成
形面２８の曲率半径をＬ／２、その深さＤを
（Ｌ／２）±αとし、αは封口部材６の形状などに
応じて補正し、最適値に設定する。 The mold 22 also includes a first guide surface 24 having a mortar-like tapered surface that narrows inward, a second guide surface 26 having a flat cylindrical surface, and a curved surface necessary for caulking. A molding surface 28 is formed continuously, and a passage hole 30 through which the leads 16a and 16b pass is formed in the central portion. FIG. 2 shows the planar shape of this mold 22. The second guide surface 26 matches the shape of the body side of the outer case 2, and the molding surface 28 forms a curved surface for curling the end of the outer case 2. The radius of curvature of the molding surface 28 is L/2, the depth D thereof is (L/2)±α, and α is corrected according to the shape of the sealing member 6 and set to an optimal value.
そして、第１図のＣに示すように、矢印Ｃの方
向に成形型２２を押し付けると、外装ケース２の
開口縁部は、成形型２２の案内面２４から案内面
２６に加圧力に従つて移動した後、第１図のＤに
示すように、成形面２８によつて湾曲成形されて
加締め加工が行われる。 1, when the mold 22 is pressed in the direction of arrow C, the opening edge of the outer case 2 is moved from the guide surface 24 of the mold 22 to the guide surface 26 according to the pressing force. After moving, as shown in D in FIG. 1, the molding surface 28 forms a curve and crimping is performed.
このような加工処理によつて、外装ケース２の
開口縁部の平坦部８ａ側には内面を頂部として外
面側に傾斜する被案内部１０が形成されているた
め、その平坦部８ａ側（短径方向）は第３図のＡ
に示すように、また、その湾曲部８ｂ側（長径方
向）は第３図のＢに示すように成形加工され、湾
曲部８ｂおよび平坦部８ａの区別なく、割れや歪
みなどを生じることなく、十分な封口強度を持つ
一様な加締め加工処理が施される。 Through such processing, a guided portion 10 is formed on the flat portion 8a side of the opening edge of the exterior case 2, and the guided portion 10 slopes outward with the inner surface as the top. radial direction) is A in Fig. 3.
As shown in FIG. 3, the curved portion 8b side (longer diameter direction) is molded as shown in FIG. A uniform crimping process with sufficient sealing strength is performed.
そして、外装ケース２の開口縁部は、第４図に
示すように、外装ケース２に肉厚内に頂部を以て
内外面側に形成した傾斜面からなる被案内部１０
ａ，１０ｂからなる被案内部１０としてもよく、
また、第５図に示すように、外装ケース２の外面
側を頂部として内面側に傾斜面とした被案内部１
０を形成しても同様に湾曲部８ｂ側との区別な
く、平坦部８ａ側を割れや歪みを生じることな
く、一様に加締め加工を行うことができる。 As shown in FIG. 4, the opening edge of the exterior case 2 has a guided portion 10 formed of an inclined surface formed on the inside and outside sides of the exterior case 2 with the top within the wall thickness.
The guided portion 10 may be composed of a, 10b,
In addition, as shown in FIG. 5, the guided portion 1 has the outer surface side of the outer case 2 as the top and the inner surface side as the sloped surface.
Even if 0 is formed, crimping can be uniformly performed on the flat portion 8a side without any distinction from the curved portion 8b side and without causing cracks or distortions.
なお、実施例では長円形の外装ケースを例にと
つて説明したが、この発明は、曲率部分と平坦部
分を備えた矩形や多角形状の外装ケースについて
も同様に適用できるものである。 Although the embodiments have been described using an oval outer case as an example, the present invention can be similarly applied to a rectangular or polygonal outer case having a curved portion and a flat portion.
以上説明したように、この発明によれば、長円
形などの非真円の外装ケースの開口部の湾曲部お
よび平坦部を割れや歪みなどを生じさせることな
く、一様に湾曲成形でき、封口精度を向上させる
ことができる。
As explained above, according to the present invention, it is possible to uniformly curve and mold the curved portion and flat portion of the opening of an oval or other non-circular exterior case without causing cracks or distortions, and to seal the opening. Accuracy can be improved.
第１図はこの発明の電解コンデンサの封口方法
の実施例を示す図、第２図は第１図に示した電解
コンデンサの封口方法に用いる成形型を示す平面
図、第３図は電解コンデンサの封口部を示す一部
断面図、第４図および第５図は外装ケースの開口
縁部に形成した被案内部についての他の実施例を
示す一部断面図、第６図は電解コンデンサの外装
ケースの成形を示す図である。
２……外装ケース、４……クリアランス部、１
０……被案内部、１０ａ，１０ｂ……被案内部、
１２……電解コンデンサ素子、１４……封口部
材、２２……成形型、２４，２６……案内面、２
８……成形面。
Fig. 1 is a diagram showing an embodiment of the electrolytic capacitor sealing method of the present invention, Fig. 2 is a plan view showing a mold used in the electrolytic capacitor sealing method shown in Fig. 1, and Fig. 3 is a diagram showing an embodiment of the electrolytic capacitor sealing method of the present invention. 4 and 5 are partial sectional views showing other embodiments of the guided portion formed at the opening edge of the exterior case. FIG. 6 is a partial sectional view showing the exterior of the electrolytic capacitor. It is a figure showing molding of a case. 2...Exterior case, 4...Clearance section, 1
0... Guided part, 10a, 10b... Guided part,
12... Electrolytic capacitor element, 14... Sealing member, 22... Molding die, 24, 26... Guide surface, 2
8...molding surface.
Claims (1)
ス部を切断した後、開口部の平坦部側縁部にプレ
ス加工によつて被案内部を形成し、電解コンデン
サ素子を収容するとともに開口部に封口部材を挿
入した外装ケースの開口縁部に、外装ケースの開
口縁部に合致する案内面とともに成形面を持つ成
形型を以て加締め加工を施す電解コンデンサの封
口方法。 ２ 前記平坦部側縁部に形成されて被案内部は、
外装ケースの外周側、肉厚内または内周側を頂部
として傾斜面とした請求項１記載の電解コンデン
サの封口方法。[Claims] 1. After cutting the clearance part of the outer case which has a non-perfect circular cylindrical shape, a guided part is formed by press working on the side edge of the flat part of the opening, and the electrolytic capacitor element is mounted. A method for sealing an electrolytic capacitor in which the opening edge of an exterior case containing a sealing member inserted into the opening is crimped using a mold having a molding surface and a guide surface that matches the opening edge of the exterior case. 2. The guided portion formed on the side edge of the flat portion is
2. The method for sealing an electrolytic capacitor according to claim 1, wherein the outer circumferential side, the inside thickness, or the inner circumferential side of the outer case is a sloped surface with the top as the top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6772488A JPH01239910A (en) | 1988-03-22 | 1988-03-22 | Method of sealing of electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6772488A JPH01239910A (en) | 1988-03-22 | 1988-03-22 | Method of sealing of electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01239910A JPH01239910A (en) | 1989-09-25 |
| JPH059932B2 true JPH059932B2 (en) | 1993-02-08 |
Family
ID=13353195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6772488A Granted JPH01239910A (en) | 1988-03-22 | 1988-03-22 | Method of sealing of electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01239910A (en) |
-
1988
- 1988-03-22 JP JP6772488A patent/JPH01239910A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01239910A (en) | 1989-09-25 |
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