CN102465243B - Method for preventing double-zero aluminum foil from rebounding after tapping off - Google Patents
Method for preventing double-zero aluminum foil from rebounding after tapping off Download PDFInfo
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- CN102465243B CN102465243B CN 201010542920 CN201010542920A CN102465243B CN 102465243 B CN102465243 B CN 102465243B CN 201010542920 CN201010542920 CN 201010542920 CN 201010542920 A CN201010542920 A CN 201010542920A CN 102465243 B CN102465243 B CN 102465243B
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Abstract
The invention discloses a method for preventing a double-zero aluminum foil from rebounding after tapping off, which comprises the following steps of: placing a high-temperature tapped aluminum coil on the ground; covering the aluminum coil with a thermal-insulating cover; and slowly cooling the aluminum coil to the required temperature. In winter with lower outdoor temperature, a thickened thermal-insulating cover is covered for keeping warm. At other seasons, a single-layer thermal-insulating cover is adopted. The single-layer thermal-insulating cover is made of a piece of single-layer high-temperature resisting cotton canvas. The thickened thermal-insulating cover is made of a cotton canvas cover filled with an asbestos material. According to the method, the phenomena of the uneven cooling caused by an ultrahigh cooling speed under the condition of exposing the high-temperature tapped aluminum coil in air, the aluminum coil rebounding caused by concentration of internal stress and the internal wrinkling are reduced. The problem of low use efficiency of a furnace, caused by a process of slowly cooling the double-zero aluminum foil in the furnace, is solved. The method is simple and practical.
Description
Technical field
The invention belongs to the nonferrous metallurgy processing technique field, relate to specifically a kind of outside the aluminium foil stove of high temperature annealing low temperature slowly cool off the method for having prevented thick stick.
Background technology
It is the following aluminium foil of 0.009mm that double-zero aluminum foil refers generally to thickness, because it has shading, performance such as fresh-keeping, anticorrosion, be widely used as the inner lining material of industries such as cigarette, food, medicine, electronics, all be combined with each other to strengthen the intensity of wrapping material during use with other wrapping material such as base materials such as plastics, paper.Require aluminium foil to have good formability and bright even curface in the recombination process.Traditional aluminium foil production process is: roll → close volume → finish rolling (pairing is rolling) → cut → anneal → pack in the blank → thick.Through the aluminium foil after rolling, because work hardening, plasticity is relatively poor, and the surface is surperficial unholiness all with one deck oil film as thin as a wafer, does not meet the food product pack requirement, so aluminium foil all is the soft state supply of material of annealing usually.
In the annealing process, generally all will be through intensification, be incubated, cool off, come out of the stove four processes, owing to heat conducting reason, aluminium volume different piece has the temperature difference, and in the aluminium volume heating and cooling period, it is big that the temperature difference can become.According to principle of expanding with heat and contracting with cold, the corresponding increase of aluminium volume internal stress of this moment, the yield strength that has surpassed the corresponding position aluminium foil when internal stress, aluminium foil generation viscous deformation forms macroscopic the thick stick in aluminium volume surface, plays the outer ring that thick stick usually occurs in aluminium volume external diameter 0～3 ㎝, and the wrinkling aluminium volume that is created in usually is inner, naked eyes be cannot see, and can only in use find, and the degree of a thick stick have the increase with aluminium volume width and coil diameter to increase the weight of trend.In recombination process, there has been the aluminium volume of thick stick smoothly to launch, have after compound and significantly play the thick stick vestige, influence the external quality of wrapped product, so generally can only take off useless processing.And the cost of composite base material is bigger than the aluminium foil cost of same length, and be lost in about 1.0% because of the improper lumber recovery that causes of thick stick technology preventive measures of having annealed general every year.
General using temperature control system in the industry, take the method for slow heating and cooling to control the inner temperature difference of aluminium volume in the annealing process, and then the control thick stick of anneal: i.e. temperature rise period of annealing, the full power of changing over or half power are heated to the method for temperature of processing requirement, and employing well heater converter technique, reach the long-time method that slowly heats up, reduce the aluminium volume internal difference in temperature of temperature rise period.Cooling stages changes annealing process end in the past, and aluminium is directly exposed to the method for cooling off in the air after rolling out stove, and has adopted elder generation slowly to be cooled to just directly come out of the stove behind the assigned temperature in stove.The speed of heating and cooling reduces greatly like this, and the inner temperature difference of aluminium volume reduces, rise the thick stick phenomenon be improved significantly.But the heating and cooling time lengthening, the whole annealing cycle has also increased about 20～30% than former technology.The utilization ratio of annealing furnace greatly reduces, and annealing cost increases, and and cause a large amount of work in-process to overstock, annealing is produced pressure and is strengthened.
For solving this contradiction, the applicant has also invented the drying room that heat exchange is used (patent No. 200810234535) specially, in order to handle to need going out furnace charge and needing the furnace charge that advances of preheating of slowly cooling.Even but like this, configuration can not be satisfied the needs to the thick stick prevention technology of having annealed fully.
Summary of the invention
For solving above-mentioned production problem, the purpose of this invention is to provide a kind of double-zero aluminum foil annealing back and realize the outer slowly method of cooling of stove, it is too fast because of speed of cooling that the aluminium that can prevent from coming out of the stove volume is directly exposed in the air, inhomogeneous cooling even and produce aluminium volume surface rise thick stick, inner may be wrinkling etc. defective.
Play the thick stick method after a kind of prevention double-zero aluminum foil is come out of the stove, the double-zero aluminum foil volume of coming out of the stove after annealing is placed on the ground, use the whole covering of stay-warm case then, after treating slowly to be cooled to the temperature of requirement, remove stay-warm case.
Play the method for thick stick after aforementioned prevention double-zero aluminum foil is come out of the stove, in the lower stay-warm case insulation that covers thickening winter of external temperature, adopt the covering of individual layer stay-warm case in other seasons.
Play the method for thick stick after aforementioned prevention double-zero aluminum foil is come out of the stove, described individual layer stay-warm case is the high temperature resistant cotton canvas of individual layer, and described thickening stay-warm case is the cotton canvas cover that fills the pinner cotton material.
Beneficial effect of the present invention is: be example with the aluminium of width 1000 ㎜ volume, falling temperature method in the traditional burner drops to the tapping temperature of appointment from holding-zone in stove, and with per hour 3 ℃ of calculating of temperature drop, the tapping temperature that arrives appointment needs about 20 hours.The present invention is simple and practical, do not take equipment such as body of heater, whole annealing cycle decreased average 10%～15%, it is long to have overcome the descent of temperature method annealing cycle, annealing efficiency is low, energy consumption is big, the problem that production cost is high, adopt method of the present invention after, aluminium foil plays thick stick and is clearly better, annealing cost descends more than 10%, and annual photoelectric charge just can be saved more than 2,000,000 yuan, and economic benefit is considerable; With aluminium foil is placed directly into outdoor exposure and in air, lowers the temperature relatively, play the thick stick ratio and reduce 70%, condemnation factor reduces 70%, the total quality of aluminium foil is highly improved.
Embodiment
Following form is in Various Seasonal (winter (embodiment 1), summer (embodiment 2)), and under the room temperature situation, aluminium adopts the effect of covered protection cover of the present invention to compare after rolling out stove.
Above-mentioned embodiment does not limit technical scheme of the present invention in any form, and every employing is equal to replaces or technical scheme that the mode of equivalent transformation obtains all drops on protection scope of the present invention.
Claims (3)
1. play the thick stick method after the prevention double-zero aluminum foil is come out of the stove, the double-zero aluminum foil volume of coming out of the stove after it is characterized in that annealing is placed on the ground, uses the whole covering of stay-warm case then, after treating slowly to be cooled to the temperature of requirement, remove stay-warm case, the temperature of described requirement is 70 ℃ in the winter time, and be 65 ℃ summer.
2. play the method for thick stick after prevention double-zero aluminum foil according to claim 1 is come out of the stove, it is characterized in that adopting the covering of individual layer stay-warm case in other seasons in the lower stay-warm case insulation that covers thickening winter of external temperature.
3. play the method for thick stick after prevention double-zero aluminum foil according to claim 2 is come out of the stove, it is characterized in that described individual layer stay-warm case is the high temperature resistant cotton canvas of individual layer, described thickening stay-warm case is the cotton canvas cover that fills the pinner cotton material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010542920 CN102465243B (en) | 2010-11-12 | 2010-11-12 | Method for preventing double-zero aluminum foil from rebounding after tapping off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010542920 CN102465243B (en) | 2010-11-12 | 2010-11-12 | Method for preventing double-zero aluminum foil from rebounding after tapping off |
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| Publication Number | Publication Date |
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| CN102465243A CN102465243A (en) | 2012-05-23 |
| CN102465243B true CN102465243B (en) | 2013-07-17 |
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| CN 201010542920 Active CN102465243B (en) | 2010-11-12 | 2010-11-12 | Method for preventing double-zero aluminum foil from rebounding after tapping off |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589976B (en) * | 2013-11-26 | 2016-04-20 | 江苏大亚铝业有限公司 | The method of thick stick has been prevented after a kind of double-zero aluminum foil annealing |
| CN111549304B (en) * | 2020-06-05 | 2021-08-24 | 江苏鼎胜新能源材料股份有限公司 | Method for improving double-zero aluminum foil annealing heat drum |
| CN112359301B (en) * | 2020-10-20 | 2022-02-01 | 无锡市铝泰新材料股份有限公司 | Annealing process of aluminum foil |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608290A (en) * | 2009-06-18 | 2009-12-23 | 西南铝业（集团）有限责任公司 | A kind of method for annealing of aluminium foil blank |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608290A (en) * | 2009-06-18 | 2009-12-23 | 西南铝业（集团）有限责任公司 | A kind of method for annealing of aluminium foil blank |
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| CN102465243A (en) | 2012-05-23 |
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Effective date of registration: 20151111 Address after: 212300 Danyang City, Jiangsu Province Economic and Technological Development Zone on the north side of Hong Kong West Patentee after: DARE TECHNOLOGY CO., LTD. Address before: 212300 No. 95 Jinling West Road, Danyang Economic Development Zone, Zhenjiang, Jiangsu Patentee before: Daya Sci & Tech. Co., Ltd. |