CN115101346A - Manufacturing method of integrated formed bolt type cover plate for aluminum electrolytic capacitor - Google Patents
Manufacturing method of integrated formed bolt type cover plate for aluminum electrolytic capacitor Download PDFInfo
- Publication number
- CN115101346A CN115101346A CN202210872913.7A CN202210872913A CN115101346A CN 115101346 A CN115101346 A CN 115101346A CN 202210872913 A CN202210872913 A CN 202210872913A CN 115101346 A CN115101346 A CN 115101346A
- Authority
- CN
- China
- Prior art keywords
- cover plate
- electrolytic capacitor
- aluminum electrolytic
- base plastic
- manufacturing
- 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.)
- Pending
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 30
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000003990 capacitor Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000004033 plastic Substances 0.000 claims abstract description 40
- 229920003023 plastic Polymers 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 239000002904 solvent Substances 0.000 claims abstract description 8
- 229920001971 elastomer Polymers 0.000 claims abstract description 7
- 229920001187 thermosetting polymer Polymers 0.000 claims description 11
- 238000001746 injection moulding Methods 0.000 claims description 8
- -1 polytetrafluoroethylene Polymers 0.000 claims description 8
- 238000007711 solidification Methods 0.000 claims description 8
- 230000008023 solidification Effects 0.000 claims description 8
- 229920002379 silicone rubber Polymers 0.000 claims description 7
- 239000012815 thermoplastic material Substances 0.000 claims description 6
- 229920000426 Microplastic Polymers 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 4
- 229920002943 EPDM rubber Polymers 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229920005549 butyl rubber Polymers 0.000 claims description 3
- 229920001973 fluoroelastomer Polymers 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 238000002788 crimping Methods 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 239000004945 silicone rubber Substances 0.000 claims description 2
- 238000004880 explosion Methods 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 4
- 239000011159 matrix material Substances 0.000 description 11
- 239000000047 product Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007965 rubber solvent Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/08—Housing; Encapsulation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention relates to the technical field of aluminum electrolytic capacitors, in particular to a method for manufacturing an integrally-formed bolt type cover plate for an aluminum electrolytic capacitor, which solves the problems that in the prior art, the number of components is large, and the assembly process is increased, so that the risk of poor forming exists, namely the transverse and longitudinal strength distribution is uneven, the sealing performance of a product is easily reduced, and particularly the bonding strength between the product and a metal terminal piece is not uniform. A manufacturing method of a cover plate for an integrated formed bolt type aluminum electrolytic capacitor comprises the cover plate, wherein an O-shaped sealing ring is sleeved on the outer side of the cover plate, and an explosion-proof plug is embedded on the cover plate. The base plastic of the invention wraps the rubber, so that the base plastic can be embedded into the aluminum shell for curling, the sealing function is achieved, the sealing performance of the cover plate can be greatly improved by adopting the safety explosion-proof plug, and meanwhile, the compatibility of the O-shaped sealing ring and the base plastic can be improved by matching the material of the O-shaped sealing ring and the material of the base plastic, and the solvent resistance, the linear expansion coefficient and the like can be realized.
Description
Technical Field
The invention relates to the technical field of aluminum electrolytic capacitors, in particular to a method for manufacturing a cover plate for an integrally-formed bolt type aluminum electrolytic capacitor.
Background
The electrolytic capacitor is a kind of capacitor, the metal foil is a positive electrode, the oxide film close to the metal with the positive electrode is a dielectric, the cathode is composed of a conductive material, an electrolyte and other materials, and the electrolytic capacitor is named because the electrolyte is the main part of the cathode. Meanwhile, the positive and negative of the electrolytic capacitor can not be connected in a wrong way. Aluminum electrolytic capacitors can be classified into four categories: a lead type aluminum electrolytic capacitor; a horn-shaped aluminum electrolytic capacitor; a bolt-type aluminum electrolytic capacitor; the solid-state aluminum electrolytic capacitor comprises a bolt type aluminum electrolytic capacitor, and a cover plate is required to be used for sealing when the bolt type aluminum electrolytic capacitor is used.
The aluminum electrolytic capacitor is formed by combining a core cladding material, a sealing material, an insulating material and the like, a cover plate of the bolt type aluminum electrolytic capacitor is embedded with a metal terminal which is usually made of thermosetting plastics, and is matched with an O-shaped sealing ring, and a silica gel explosion-proof plug for pressure relief, which is characterized in that the number of components is large, the assembly process is increased, the efficiency is low, the reliability of the product is reduced due to poor leakage caused by poor assembly, the assembly process is completed manually, the risk of pollution is increased, thereby increasing the risk of open circuit caused by product corrosion, and in addition, the thermosetting plastic needs to be stored at low temperature before the molding process, otherwise solidification or partial solidification is easy to occur, thereby having the risk of poor molding, that is, the strength distribution in the transverse and longitudinal directions is not uniform, which tends to reduce the sealing property of the product, and particularly, the bonding strength with the metal terminal member is not uniform, which also tends to cause liquid leakage failure.
Disclosure of Invention
The invention aims to provide a method for manufacturing an integrally-formed bolt type cover plate for an aluminum electrolytic capacitor, which solves the problems that in the prior art, the number of components is large, the assembly process is increased, the efficiency is often low, the reliability of the product is reduced due to poor liquid leakage caused by poor assembly, the assembly process is finished manually, thermosetting plastic needs to be stored at low temperature before the thermosetting plastic is formed, otherwise solidification or partial solidification is easy to occur, the risk of poor forming is caused, namely the transverse and longitudinal strength distribution is uneven, the sealing performance of the product is easily reduced, and particularly the bonding strength between the product and metal terminal pieces is not uniform.
In order to achieve the purpose, the invention adopts the following technical scheme:
a manufacturing method of a cover plate for an integrated formed bolt type aluminum electrolytic capacitor comprises the cover plate, an O-shaped sealing ring is sleeved on the outer side of the cover plate, an explosion-proof plug is embedded on the cover plate, and base plastic is fixedly connected to two sides of the cover plate.
Preferably, the matrix plastic is a thermosetting material such as epoxy resin, polyphenylene sulfide and the like, and is changed into a thermoplastic material such as nylon, polytetrafluoroethylene, polypropylene, polyethylene and the like.
Preferably, the O-shaped sealing ring is made of ethylene propylene diene monomer rubber, and the O-shaped sealing ring can be formed by injection, and butyl rubber, silicon rubber, fluororubber and the like can be selected as materials, and the rubber types can be reasonably matched according to the type of the matrix plastic, so that the compatibility of the O-shaped sealing ring and the matrix plastic is improved, and the O-shaped sealing ring can be formed in the aspects of solvent resistance, linear expansion coefficient and the like.
Preferably, the safe common silicon rubber for the explosion-proof plug has excellent solvent resistance and high temperature resistance.
Preferably, the matrix plastic is a thermoplastic material, and can be formed by injection molding, only high-temperature melting is needed to be carried out on plastic granules, the plastic granules are injected into a required mold cavity through certain pressure, the mold has the function of inlaying a metal piece, meanwhile, cooling runners are distributed on the mold, and cooling solidification molding is carried out while the mold cavity is filled with the plastic.
Preferably, the molded matrix plastic embedded with the metal piece is subjected to secondary injection molding, so that the matrix plastic wraps the rubber, the aluminum shell can be embedded for crimping, and the sealing function is achieved.
Preferably, the safety explosion-proof plug does not need to be formed additionally, a hole is reserved in the base body plastic, the base body plastic is covered by the glue layer, and the size of the explosion-proof plug can be designed according to the explosion-proof pressure.
The invention has at least the following beneficial effects:
the invention relates to a method for manufacturing an integrally-formed bolt type cover plate for an aluminum electrolytic capacitor, which realizes that base plastic, a sealing ring and a safe explosion-proof plug can be all formed by injection molding through the change of the base plastic, thereby realizing the integral forming of the cover plate without the need of further separation forming and assembling, greatly improving the production efficiency, reducing the storage requirement of materials, avoiding the risk of pollution caused by the assembling of cover plate components, greatly improving the reliability of products, simultaneously, the base plastic wraps rubber, realizing the embedding of aluminum shell curling edge to achieve the sealing function, adopting the safe explosion-proof plug can greatly improve the sealing property of the cover plate, simultaneously, the material of an O-shaped sealing ring is matched with the material of the base plastic for use, improving the compatibility of the O-shaped sealing ring and the base plastic, avoiding more component parts in the traditional aspects of solvent resistance, linear expansion coefficient and the like, the assembly process is increased, the efficiency is low frequently, liquid leakage caused by poor assembly reduces the reliability of the product, the assembly process is completed manually, thermosetting plastic needs to be stored at low temperature before the thermosetting plastic is molded, otherwise solidification or partial solidification is easy to occur, and therefore the risk of poor molding exists, namely the transverse and longitudinal strength distribution is uneven, the sealing performance of the product is easy to reduce, and particularly the problem that the bonding strength between the thermosetting plastic and the metal terminal piece is different is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a diagram of a cover plate structure according to the present invention.
In the figure: 1. a cover plate; 2. an O-shaped sealing ring; 3. an explosion-proof plug; 4. and (3) matrix plastic.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
Referring to fig. 1, including apron 1, its characterized in that, the outside of apron 1 has cup jointed O type sealing washer 2, and the last inlay of apron 1 is equipped with explosion-proof plug 3, and the equal fixedly connected with base plastic 4 in both sides of apron 1, the explosion-proof plug 3 of safe type commonly uses silicon rubber, and silicon rubber solvent resistance is good, and high temperature resistance is good, and the explosion-proof plug 3 of safe type need not other shaping, but through base plastic 4 trepanning, the glue film covers, and the size of explosion-proof plug 3 can be designed according to explosion-proof pressure.
The safety explosion-proof plug 3 is utilized to enhance the sealing performance of the cover plate 1, and meanwhile, the safety explosion-proof plug can be adjusted and used at any time according to the required explosion-proof pressure, so that the safety explosion-proof plug has high flexibility.
Example two
Referring to fig. 1, the matrix plastic 4 is a thermoplastic material, such as nylon, teflon, polypropylene, polyethylene, etc., instead of a thermosetting material, such as epoxy resin, polyphenylene sulfide, etc.
The excellent physical mechanical and electrical insulating property, the bonding property with various materials and the flexibility of the using process of the epoxy resin are not possessed by other thermosetting plastics, so that the epoxy resin can be prepared into coatings, composite materials, casting materials, adhesives, molding materials and injection molding materials.
EXAMPLE III
Referring to fig. 1, the O-ring 2 is made of ethylene propylene diene monomer rubber, which may be injection molded, and may be made of butyl rubber, silicone rubber, fluororubber, etc., and the rubber type may be reasonably matched according to the type of the base plastic 4, so as to improve compatibility between the two types, and may have solvent resistance and linear expansion coefficient.
The compatibility of the O-shaped sealing ring and the matrix plastic can be improved by matching the material of the O-shaped sealing ring and the material of the matrix plastic, and the solvent resistance, the linear expansion coefficient and the like can be realized.
Example four
Referring to fig. 1, the matrix plastic 4 is a thermoplastic material, and can be formed by injection molding, only needs to melt plastic granules at high temperature, and is injected into a required mold cavity through certain pressure, the mold has the function of inlaying metal pieces, and meanwhile, the mold is provided with cooling runners, and is cooled, solidified and molded while the mold cavity is filled with the plastic.
EXAMPLE five
Referring to fig. 1, the safety type explosion-proof plug 3 does not need to be formed additionally, but is provided with a hole through the base plastic 4, covered by a glue layer, and the size of the explosion-proof plug 3 can be designed according to the explosion-proof pressure.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The manufacturing method of the cover plate for the integrated forming bolt type aluminum electrolytic capacitor comprises the cover plate (1) and is characterized in that an O-shaped sealing ring (2) is sleeved on the outer side of the cover plate (1), an explosion-proof plug (3) is embedded on the cover plate (1), and base plastic (4) is fixedly connected to the two sides of the cover plate (1).
2. The method of manufacturing a cover plate for an aluminum electrolytic capacitor of integrally formed bolt type according to claim 1, wherein the base plastic (4) is a thermosetting material such as epoxy resin, polyphenylene sulfide, etc. and is changed into a thermoplastic material such as nylon, polytetrafluoroethylene, polypropylene, polyethylene, etc.
3. The method for manufacturing the cover plate for the integrally-formed bolt type aluminum electrolytic capacitor according to claim 1, wherein the O-shaped sealing ring (2) is made of ethylene propylene diene monomer rubber, and the O-shaped sealing ring can be formed by injection molding, and the O-shaped sealing ring can be made of butyl rubber, silicon rubber, fluororubber and the like, and the rubber types can be reasonably matched according to the type of the base plastic (4), so that the compatibility of the O-shaped sealing ring and the base plastic can be improved, and the O-shaped sealing ring can be used for resisting solvent, improving the linear expansion coefficient and the like.
4. The method for manufacturing a lid plate for an integrally formed bolt-type aluminum electrolytic capacitor as recited in claim 1, wherein said safety type explosion vent (3) is made of silicone rubber, which is excellent in solvent resistance and high temperature resistance.
5. The method for manufacturing the cover plate for the integrally-formed bolt type aluminum electrolytic capacitor according to claim 1, wherein the base plastic (4) is a thermoplastic material, and the base plastic can be formed by injection molding, only plastic granules need to be melted at high temperature, and the plastic granules are injected into a required mold cavity under certain pressure, so that the mold has the function of inlaying metal pieces, and meanwhile, cooling runners are distributed on the mold, and the cooling solidification molding is carried out while the mold cavity is filled with the plastic.
6. The method for manufacturing the cover plate for the integrally-formed bolt type aluminum electrolytic capacitor according to claim 1, wherein the formed base plastic (4) embedded with the metal piece is subjected to secondary injection molding, so that the base plastic (4) is wrapped with rubber, and the base plastic can be embedded into an aluminum shell for crimping to achieve a sealing function.
7. The method for manufacturing a cover plate for an aluminum electrolytic capacitor with integrally formed bolts as claimed in claim 1, wherein the safety type explosion-proof plug (3) is not formed separately, but is provided with a hole through the base plastic (4) and covered by a glue layer, and the size of the explosion-proof plug (3) can be designed according to the explosion-proof pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210872913.7A CN115101346A (en) | 2022-07-22 | 2022-07-22 | Manufacturing method of integrated formed bolt type cover plate for aluminum electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210872913.7A CN115101346A (en) | 2022-07-22 | 2022-07-22 | Manufacturing method of integrated formed bolt type cover plate for aluminum electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115101346A true CN115101346A (en) | 2022-09-23 |
Family
ID=83298966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210872913.7A Pending CN115101346A (en) | 2022-07-22 | 2022-07-22 | Manufacturing method of integrated formed bolt type cover plate for aluminum electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115101346A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1064769A (en) * | 1996-08-14 | 1998-03-06 | Asahi Glass Co Ltd | Electric double layer capacitor |
| JP2000030676A (en) * | 1998-07-14 | 2000-01-28 | Hitachi Ltd | Secondary battery |
| US6855885B1 (en) * | 2001-08-23 | 2005-02-15 | Epcos Ag | Electrical component housing |
| JP2006310834A (en) * | 2005-03-31 | 2006-11-09 | Nippon Chemicon Corp | Capacitor and manufacturing method thereof |
| JP2011060880A (en) * | 2009-09-08 | 2011-03-24 | Nok Corp | Sealing plate |
| CN201804924U (en) * | 2010-09-24 | 2011-04-20 | 比亚迪股份有限公司 | Alkaline cell sealing ring and alkaline cell using same |
| CN102412064A (en) * | 2010-09-25 | 2012-04-11 | 周旺龙 | Seal terminal cover plate of large-scale aluminum electrolytic capacitor and sealing method |
| CN102800491A (en) * | 2011-05-25 | 2012-11-28 | 特柏斯电子有限公司 | Sealing body for electrolytic capacitor and electrolytic capacitor |
| CN204067075U (en) * | 2014-09-29 | 2014-12-31 | 浙江中泽电气有限公司 | A kind of aluminium electrolytic capacitor hermetically-sealed construction |
| CN112233905A (en) * | 2020-10-14 | 2021-01-15 | 南通一品机械电子有限公司 | Easily-manufactured bolt type aluminum electrolytic capacitor and preparation process thereof |
| CN114141543A (en) * | 2021-11-17 | 2022-03-04 | 江西联晟电子股份有限公司 | Air-tight aluminum electrolytic capacitor |
-
2022
- 2022-07-22 CN CN202210872913.7A patent/CN115101346A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1064769A (en) * | 1996-08-14 | 1998-03-06 | Asahi Glass Co Ltd | Electric double layer capacitor |
| JP2000030676A (en) * | 1998-07-14 | 2000-01-28 | Hitachi Ltd | Secondary battery |
| US6855885B1 (en) * | 2001-08-23 | 2005-02-15 | Epcos Ag | Electrical component housing |
| JP2006310834A (en) * | 2005-03-31 | 2006-11-09 | Nippon Chemicon Corp | Capacitor and manufacturing method thereof |
| JP2011060880A (en) * | 2009-09-08 | 2011-03-24 | Nok Corp | Sealing plate |
| CN201804924U (en) * | 2010-09-24 | 2011-04-20 | 比亚迪股份有限公司 | Alkaline cell sealing ring and alkaline cell using same |
| CN102412064A (en) * | 2010-09-25 | 2012-04-11 | 周旺龙 | Seal terminal cover plate of large-scale aluminum electrolytic capacitor and sealing method |
| CN102800491A (en) * | 2011-05-25 | 2012-11-28 | 特柏斯电子有限公司 | Sealing body for electrolytic capacitor and electrolytic capacitor |
| CN204067075U (en) * | 2014-09-29 | 2014-12-31 | 浙江中泽电气有限公司 | A kind of aluminium electrolytic capacitor hermetically-sealed construction |
| CN112233905A (en) * | 2020-10-14 | 2021-01-15 | 南通一品机械电子有限公司 | Easily-manufactured bolt type aluminum electrolytic capacitor and preparation process thereof |
| CN114141543A (en) * | 2021-11-17 | 2022-03-04 | 江西联晟电子股份有限公司 | Air-tight aluminum electrolytic capacitor |
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