CN1232675C - Electrolytic capacitor aluminum foil continuous annealing process - Google Patents
Electrolytic capacitor aluminum foil continuous annealing process Download PDFInfo
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- CN1232675C CN1232675C CN 200310115565 CN200310115565A CN1232675C CN 1232675 C CN1232675 C CN 1232675C CN 200310115565 CN200310115565 CN 200310115565 CN 200310115565 A CN200310115565 A CN 200310115565A CN 1232675 C CN1232675 C CN 1232675C
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Abstract
The present invention relates to a continuous annealing technology for the aluminium foil of an electrolytic capacitor, which belongs to the technical field of the heat treatment of non-ferrous metal. The present invention provides a novel annealing technological process carried out in a fast mode and based on a continuous annealing furnace with the protective atmosphere. In the annealing process, an aluminium roll is opened, enters the continuous furnace with the protective atmosphere from the beginning to the end in sequence, and is heated. The running linear speed of the aluminium foil from a furnace mouth to a furnace outlet is controlled in the range of 0.1 to 80 meters per minute. In the temperature increasing stage in the furnace, the temperature of the aluminium foil is increased in the range of 5 to 600 DEG C per minute, and the temperature increasing range is from 180 DEG C to 600 DEG C. In the temperature increasing range, the temperature of the aluminium foil can be kept at any temperature, and the heat preservation time of each point is from 1 minute to 600 minutes. After heat preservation, the cooling speed is from 5 DEG C to 600 DEG C per minute. The technology has the characteristics of high annealing speed, high productive efficiency, high precision of temperature control and uniform annealing of the aluminium foil in each position in the aluminium roll, and is suitable for using in enterprises manufacturing aluminium foil used for the electrolytic capacitor.
Description
Technical field
The invention belongs to non-ferrous metal thermal treatment field.
Background technology
High-purity aluminum foil is used to make aluminium electrolutic capacitor in large quantities industrial.Aluminium foil will be through the heating anneal of different steps in its processing and manufacturing.Conventional packaging foil need be annealed usually to reach the purpose of softening aluminium foil.The annealing process of the aluminium foil for electrolytic capacitor that grew up in recent years is not only to soften aluminium foil, but also will obtain required aluminium foil weave construction and texture by suitable annealing heat-processed.Current electrolysis capacitor aluminium foil manufacturing enterprise generally adopts the annealing way of packaging foil, promptly aluminum foil coil is carried out the rolling vacuum annealing, or the rolling protective atmosphere annealing, to realize softening aluminium foil and to the control of aluminium foil weave construction and texture.Also there is part enterprise to adopt the mode of heating anneal in the air.Reported the technology of annealed stage by stage that is used for aluminum foil for electrolytic condenser among the Chinese patent ZL 91 1 11911.6 " annealing process of high-purity aluminium foil for high-voltage electrolytic capacitor ", this technology is used for the aluminium foil coil annealing more.In order to enhance productivity under the prerequisite that guarantees annealing quality, some enterprises begin to adopt the method for protective atmosphere annealing.Heating can possess higher heat transfer efficiency than heating under vacuum in recycling-guard atmosphere, thereby can suitably shorten annealing time, and has improved the homogeneity of annealed structure to a certain extent.
Yet caloric requirement was progressively rolled up internal transmission to aluminium from aluminium volume appearance when aluminium foil was carried out vacuum or protective atmosphere heating in the mode of rolling; Caloric requirement is progressively transmitted to aluminium volume surface from aluminium volume inside during cooling; The inner temperature with aluminium volume surface of aluminium volume also is not quite similar in insulating process.Therefore each position of a rolls of aluminum foil can experience different heat-processed in annealing process, and then aluminium is rolled up the weave construction at each position and the homogeneity scarcely that texture has after the annealing, brings disadvantageous effect to aluminium volume total quality.When the aluminum foil coil size was smaller, this disadvantageous effect still can not brought complete unacceptable consequence to aluminium foil quality, and therefore this technology is still generally adopted so far.Along with the raising of production-scale continuous expansion of electrolytic condenser manufacturing concern and production efficiency, also increasing to the requirement of aluminium volume weight, also more and more stricter to the inhomogeneity requirement of the weave construction of aluminium foil.If still keep traditional annealing way not only can obviously increase above-mentioned ununiformity, and can be because of aluminium tape measure very little increase increasing significantly annealing time, reduction production efficiency.Some iron and steel enterprises have adopted continuous annealing process to steel plate at present, to replace the Zhao Shi furnace annealing of rolling mode; Can be after having changed parameter and annealing so that annealing time tapered to tens minutes or less time by tens hours.Yet the materialogy character and the aluminium foil of steel products have the different of essence, therefore can not directly use the steel plate continuous annealing process to aluminium foil, need to set up the continuous annealing process that is fit to aluminium foil.
Summary of the invention
The present invention is directed to the low and non-uniformity problem of production efficiency that exists in the existing annealing process of aluminium foil for electrolytic capacitor volume; propose a kind ofly to carry out with immediate mode; annealing process flow process based on the protective atmosphere continuous annealing furnace; not only annealing time can be shortened, and the homogeneity of aluminium volume annealed structure structure and texture can be obviously improved.
The present invention proposes in the protective atmosphere continuous annealing furnace aluminum foil for electrolytic condenser to be involved in the continuous operation type homo genizing annelaing technical process of row.Aluminium volume is opened in the annealing process, and from first to last order enters the continuous oven internal heating that has protective atmosphere, aluminium foil from go into fire door to the linear velocity span of control of plug for outlet operation 0.1～80 meter of per minute; Temperature rise period in stove, aluminium foil heats up with the speed of 5～600 ℃ of per minutes, and the intensification scope is 180～600 ℃; Can be in the intensification scope in the insulation of arbitrary temp place, the time of every place insulation is 1～600 minute; The speed of insulation postcooling is 5～600 ℃ of per minutes.
Can adopt non-oxide protective atmospheres such as nitrogen, argon gas, hydrogen in the stove, protective atmosphere pressure is higher than the outer air pressure of stove in the stove.
The advantage and the characteristics of continuous annealing process proposed by the invention are, compare with conventional aluminium foil coil annealing technology, and aluminium is rolled up surperficial position and experienced different heat-processed with the centre in the conventional aluminium foil coil annealing process; If the employing continuous annealing mode, then the heat-processed of each position experience of aluminum foil coil just no longer has any difference in principle.No matter aluminium volume weight is much, aluminium is rolled up the thermal process that each position experienced in whole annealing process be duplicate, can uniformity ground heat-up rate, Heating temperature, soaking time, the speed of cooling in strict control each stage of annealing process, make annealing time taper in 2 hours, thereby when improving annealing speed, fundamentally provide good heat treatment environment for the homogeneity that guarantees aluminium volume annealed structure structure and texture from original tens hours.The present invention has that annealing speed is fast, production efficiency is high, temperature control precision is high, each position of aluminium foil uniform characteristics of annealing in the aluminium volume, is adapted at aluminium foil for electrolytic capacitor manufacturing enterprise and uses.
Description of drawings
Fig. 1 rolls up the different heating process synoptic diagram that surperficial position and centre experiences for aluminium in the conventional aluminium foil coil annealing process.
Embodiment
Continuous annealing furnace is charged into protective atmosphere, and the outer atmosphere of stove is kept malleation.Each heating zone of continuous annealing furnace is adjusted to corresponding furnace temperature.Roll up uncoiling on the paper tinsel volume frame that is placed on the continuous annealing furnace inlet with being annealed aluminium, by leader tape aluminium is rolled up an introducing continuous annealing furnace, and draw from the continuous annealing outlet of still, on the paper tinsel volume frame that exports, be rolled into the aluminium volume again through after each heating phase.Thus aluminium volume from first to last order, enter continuous annealing furnace equably and finish annealing process, and be rolled into the annealed aluminium volume again.When previous aluminium volume opened to the end of reel, the end of reel seam that the volume head and the previous aluminium of next aluminium volume can be rolled up can be implemented the continuous annealing of a plurality of aluminium volumes thus incessantly.Twist in the travelling speed in the continuous annealing furnace and cooperate by adjusting aluminium, can guarantee the accurate enforcement of above-mentioned annealing process flow process with the temperature of each heating zone.
Claims (1)
1, a kind of continuous annealing process of aluminum foil for electrolytic condenser, in protective atmosphere, anneal, it is characterized in that, the aluminium volume is opened in the annealing process, from first to last order enters the continuous oven internal heating that has hydrogen shield atmosphere, aluminium foil from go into fire door to the linear velocity span of control of plug for outlet operation 0.1～80 meter of per minute; Temperature rise period in stove, aluminium foil heats up with the speed of 5～600 ℃ of per minutes, and the intensification scope is 180～600 ℃; In the intensification scope, in the insulation of arbitrary temp place, the time of every place insulation is 1～600 minute; The speed of insulation postcooling is 5～600 ℃ of per minutes.From first to last order enters the continuous oven internal heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310115565 CN1232675C (en) | 2003-12-02 | 2003-12-02 | Electrolytic capacitor aluminum foil continuous annealing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310115565 CN1232675C (en) | 2003-12-02 | 2003-12-02 | Electrolytic capacitor aluminum foil continuous annealing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1546716A CN1546716A (en) | 2004-11-17 |
| CN1232675C true CN1232675C (en) | 2005-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310115565 Expired - Fee Related CN1232675C (en) | 2003-12-02 | 2003-12-02 | Electrolytic capacitor aluminum foil continuous annealing process |
Country Status (1)
| Country | Link |
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| CN (1) | CN1232675C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608291B (en) * | 2009-07-17 | 2011-04-27 | 西南铝业（集团）有限责任公司 | Thermal treatment method of aluminum alloy |
| CN102560294B (en) * | 2010-12-28 | 2014-03-12 | 湖南晟通科技集团有限公司 | Annealing process for aluminum foil |
| CN103131972B (en) * | 2011-12-01 | 2016-09-28 | 湖南晟通科技集团有限公司 | A kind of aluminium foil continuous annealing method and aluminium foil continuous annealing furnace |
| CN103131840B (en) * | 2011-12-01 | 2016-05-25 | 湖南晟通科技集团有限公司 | Aluminium foil continuous annealing furnace |
| CN109767919A (en) * | 2017-11-09 | 2019-05-17 | 东莞东阳光科研发有限公司 | A method of improving high voltage electronic aluminum foil and stays border region toughness |
| CN109468554B (en) * | 2018-11-19 | 2020-12-01 | 广西柳州银海铝业股份有限公司 | Method for eliminating white spot of cold-rolled aluminum coil edge annealing |
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2003
- 2003-12-02 CN CN 200310115565 patent/CN1232675C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1546716A (en) | 2004-11-17 |
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Granted publication date: 20051221 Termination date: 20101202 |