JPH01239911A - Method of sealing of electrolytic capacitor - Google Patents
Method of sealing of electrolytic capacitorInfo
- Publication number
- JPH01239911A JPH01239911A JP6772588A JP6772588A JPH01239911A JP H01239911 A JPH01239911 A JP H01239911A JP 6772588 A JP6772588 A JP 6772588A JP 6772588 A JP6772588 A JP 6772588A JP H01239911 A JPH01239911 A JP H01239911A
- Authority
- JP
- Japan
- Prior art keywords
- opening
- outer case
- sealing
- electrolytic capacitor
- case
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 29
- 239000003990 capacitor Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000000465 moulding Methods 0.000 claims description 14
- 238000005452 bending Methods 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000002788 crimping Methods 0.000 description 5
- 230000003811 curling process Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects 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)
Abstract
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 ellipse.
−ａ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形成することにより
、底部および周壁部からなる筒状体に形成される。この
ような形成加工は、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。-a, the exterior case of the electrolytic capacitor is formed into a cylindrical body consisting of a bottom part and a peripheral wall part by placing a coin-shaped aluminum piece in a mold and forming it under pressure. 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, for ease of processing.
そして、成形型は外装ケース形状に合わせ、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４図の（Ａ）に示すよう
に、成形によっ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
工上の便宜から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４図の
（Ｂ）に−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方向に向かって行われるため、第４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。Then, the mold is matched to the outer case shape, 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. 4A, the exterior case 2 obtained by molding is provided with a similar clearance portion 4 having a larger opening area than the body portion which is the original container portion. This clearance part 4 is formed for processing convenience and is unnecessary from the original function of the outer case 2, so it is the part shown by the dashed line in FIG. 4(B). disconnected. 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 FIG. 4(C). Moreover, it is difficult to set the cut surface continuously on the body of the outer case 2 due to the thickness of the cutting blade, etc., and the end of the outer case 2 leaves a part of the clearance part 4 and A burr 6 will be formed on the upper and outer peripheral edge, and the opening will have a very complicated shape.
（発明が解決しようとする課題〕
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
することがあった。実験によれば、長円形の外装ケース
では、平坦部側がカーリング処理に対する応力が大きく
、割れなどを生しることが確認されている。(Problem to be Solved by the Invention) When the curling process is performed on the upper surface side of the sealing member using such an exterior case 2, the opening shape is not an oval shape having a continuous flat part and a curved part. In addition to locally differing curvatures, the burrs 6 occurring at the edges impede movement on the molding surface of the mold, and the bending stress of the opening edge in response to the curling process differs greatly at each part of the periphery. The opening of the exterior case 2 that has been subjected to this process has cracks and distortions in shape, resulting in a decrease in sealing accuracy and a deterioration in the quality of the product.According to experiments, in the case of an oval exterior case, It has been confirmed that the stress on the flat side is large during the curling process, resulting in 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目方法の捉供を目的とする。Therefore, the present invention provides a method for sealing an electrolytic capacitor using a non-perfect round outer case such as an oval shape, which prevents cracking or distortion of the outer case and improves sealing accuracy. The purpose is to capture the children.
［課題を解決するための手段］
この発明の電解コンデンサの封目方法は、第１図に示す
ように、非真円の筒状を成す外装ゲース２のクリアラン
ス部４を切断し、開口部の平坦部８ａ側縁部の外側角部
に傾斜面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２
２を以て加締め加工を行うことを内容とする。[Means for Solving the Problems] As shown in FIG. 1, the method for sealing an electrolytic capacitor of the present invention involves cutting the clearance portion 4 of the outer gauge 2 which has a non-perfect circular cylindrical shape, and sealing the opening. A slope 10 is formed at the outer corner of the side edge of the flat portion 8a, and an opening of the exterior case 2 is formed at the opening edge of the exterior case 2, in which the electrolytic capacitor element 12 is accommodated and a sealing member 14 is inserted into the opening. Molding mold 2 with molding surface 28 with guide surfaces 24, 26 matching the edges
The content is to perform crimping processing using step 2.
（作 用）
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
切断した後、開口部の平坦部８ａ側縁部の外側角部を傾
斜面１０に加工すると、この加工の結果、平坦部８ａ側
縁部の内方への曲げ応力を低下させることができる。し
たがって、このような外装ケース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成形面２８を持つ成形型２２を
以て加締め加工すると、開口縁部の湾曲成形が曲率の相
違に無関係に一様に行われる。(Function) After cutting the formed clearance part 4 on the opening side of the exterior case 2, when the outer corner of the side edge of the flat part 8a of the opening part is processed into an inclined surface 10, as a result of this processing, the flat part The inward bending stress of the side edge 8a can be reduced. Therefore, after accommodating the electrolytic capacitor element 12 and inserting the sealing member 14 into such an exterior case 2, the molding surface necessary for crimping along with the guide surfaces 24 and 26 that match the opening edge of the exterior case 2 are formed. When crimping is performed using the mold 22 having the shape 28, the opening edge is uniformly curved regardless of the difference in curvature.
［実 施 例］
第１図は、この発明の電解コンデンサの封目方法の実施
例を示す。[Example] FIG. 1 shows an example of the method for sealing an electrolytic capacitor of the present invention.
第１図の（Ａ）に示すように、−成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が周縁に沿って形成される。外装ケース２は、たと
えば、アルミニウム片で形成加工されたものであり、開
口縁部の形態も任意に加工可能である。As shown in FIG. 1A, when the clearance part 4 is cut from the exterior case 2 as a molded product, a burr 6 is formed along the periphery of the opening of the exterior case 2 along with a part of the clearance part 4. It is formed by The exterior case 2 is made of, for example, an aluminum piece, and the shape of the opening edge can be arbitrarily processed.
そこで、第１図の（Ｂ）に示すように、平坦部８ａ側を
成形することによって、外側角部に外側に傾斜する傾斜
面１０を形成する。この傾斜面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
囲に亘って形成してもよい。Therefore, as shown in FIG. 1B, by molding the flat portion 8a side, an inclined surface 10 that slopes outward is formed at the outer corner portion. The inclined surface 10 may be formed at the opening edge of the outer case 2 all around 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掻側のリード１６ａ、１６ｂが貫通
している。For the exterior case 2 whose opening edge has been processed in this way,
As shown in FIG. 1(C), the electrolytic capacitor element 12
After accommodating the opening, the sealing member 14 is inserted into the opening. 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 through.
このように外装ケース２に対し、電解コンデンサ素子Ｉ
２が収容され、封口部材Ｉ４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１日に挿入する。In this way, the electrolytic capacitor element I
2 has been accommodated and the sealing member I4 has been inserted (temporary sealing), and then the mold is inserted into the holding mold 1 in this temporarily sealed state, as shown in FIG.
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。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 exterior case 2 protrudes from the sealing member 14 by a length necessary for the curling process, and the opening side of the exterior case 2 is held by the holding mold 18.
It shall be set by exposing it from
また、成形型２２には、内方に狭（なる播鉢状にテーパ
面を成す第１の案内面２４、平坦な円筒状を成す第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１６
ａ、’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。The mold 22 also has a first guide surface 24 that is tapered inwardly into a bowl shape, a second guide surface 26 that is flat and cylindrical, and a curved surface that is necessary for caulking. A molding surface 28 consisting of
A through hole 30 is formed for passing through the a and '16b. FIG. 2 shows the planar shape of this mold 22.
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１４の形状などに応じて補正し、最適値に
設定する。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. Note that the radius of curvature of the molding surface 28 is L/2, the depth D is (L/2)±α,
α is corrected according to the shape of the sealing member 14 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
って移動した後、第１図の（Ｄ）に示すように、成形面
２８によって湾曲成形されて加締め加工が行われる。As shown in FIG. 1C, when the mold 22 is pressed in the direction of arrow C, the opening edge of the outer case 2 moves from the guide surface 24 of the mold 22 to the guide surface 26 according to the pressure. After moving, as shown in FIG. 1(D), the molding surface 28 forms a curve and crimping is performed.
このような加工処理によって、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
傾斜面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、湾曲部および平坦部の区別なく、また
、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−様な加締め加工処理が施される。Through such processing, an inclined surface 10 is formed on the flat portion 8a side of the opening edge of the exterior case 2, with the inner surface being the top and sloping toward the outer surface.
The curved portion 8b side (longer diameter direction) is molded as shown in FIG. 3(A), and the curved portion 8b side (longer diameter direction) is molded as shown in FIG. 3(B). A crimping process is performed that provides sufficient sealing strength without discrimination, without causing cracks or distortions, etc.
なお、実施例では長円形の外装ケースを例に取って説明
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、−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, the curved part and flat part of the opening of a non-round outer case such as an oval shape can be curved into a - shape without causing cracks or distortions, and the opening can be sealed. 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
１０・・・傾斜面
１２・・・電解コンデンサ素子
１４・・・封口部材
２２・・・成形型
２４．２６・・・案内面
２８・・・成形面
第 ２ 図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. FIG. 4 is a partial cross-sectional view showing the sealing portion, and is a view showing the molding of the exterior case of the electrolytic capacitor. 2...Exterior case 4...Clearance section 10...Slanted surface 12...Electrolytic capacitor element 14...Sealing member 22...Molding die 24.26...Guide surface 28...Molding Figure 2
Claims (1)
し、開口部の平坦部側縁部の外側角部に傾斜面を形成し
、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。The clearance part of the outer case, which has a non-perfect circular cylindrical shape, is cut, and a sloped surface is formed at the outer corner of the flat side edge of the opening to accommodate the electrolytic capacitor element, and a sealing member is attached to the opening. A method for sealing an electrolytic capacitor in which the opening edge of an inserted outer case is crimped using a mold having a molding surface and a guide surface that matches the opening edge of the outer case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6772588A JPH01239911A (en) | 1988-03-22 | 1988-03-22 | Method of sealing of electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6772588A JPH01239911A (en) | 1988-03-22 | 1988-03-22 | Method of sealing of electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01239911A true JPH01239911A (en) | 1989-09-25 |
| JPH056359B2 JPH056359B2 (en) | 1993-01-26 |
Family
ID=13353224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6772588A Granted JPH01239911A (en) | 1988-03-22 | 1988-03-22 | Method of sealing of electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01239911A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002184656A (en) * | 2000-12-15 | 2002-06-28 | Nippon Chemicon Corp | Electrolytic capacitor |
-
1988
- 1988-03-22 JP JP6772588A patent/JPH01239911A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002184656A (en) * | 2000-12-15 | 2002-06-28 | Nippon Chemicon Corp | Electrolytic capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH056359B2 (en) | 1993-01-26 |
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