CN102527719B - Production method of aluminum foil for computer direct composing and printing - Google Patents
Production method of aluminum foil for computer direct composing and printing Download PDFInfo
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Abstract
The invention relates to a production method of an aluminum foil, in particular to a production method of an aluminum foil for computer direct composing and printing. The shortcomings of unqualified surface quality, low size precision, low quality of board shape, high rejection ratio, improper Fe and Si content control and incapability of satisfying the demand of computer direct composing and printing on the surface quality of the aluminum foil for the computer direct composition and printing produced by the prior technology are mainly overcome by the production method disclosed by the invention. The production method comprises a smelting and roll casting technology which is carried out by steps of pouring an aluminum ingot into a smelting furnace for smelting; discharging the smelted aluminum ingot from the furnace and refining, removing slag, removing gas and filtering the aluminum ingot; a cold rolling technology which is carried out by a step of pressing down and cold rolling a cold roll by a cold rolling machine; a foil rolling technology which is carried out by a step of rolling an aluminum belt by a foil rolling machine; and a cleaning and straightening technology which is carried out by a step of straightening the aluminum foil by a pure stretching straightening machine.
Description
Technical field
The present invention relates to a kind of production method of aluminium strip, especially relate to the production method of the direct typographical printing of a kind of computer with aluminium foil.
Background technology
Aluminium is to use maximum in non-ferrous metal, one of metal material that application surface is the widest, it has a series of strong physics, chemistry and processing characteristics, it is of many uses, as high most advanced and sophisticated sci-tech product, high-grade building and ornament materials, communications and transportation, Aero-Space, lamp lighting, electronic product, printing plate-based etc.Because there are all more difficult necessary requirements that reaches such as surface quality, dimensional accuracy, strip shape quality in the direct typographical printing of the computer according to domestic original fabrication process with aluminium foil, and percent defective is high and Fe, the control of Si content are improper, can't meet the shortcoming of the direct typographical printing of computer with the requirement of aluminium foil Surface Quality, therefore the direct typographical printing of present most computer is all from external import with aluminium foil, thereby also there is very large blank for improving the direct typographical printing of computer with aluminium foil.
Summary of the invention
The invention provides the production method of the direct typographical printing of a kind of computer with aluminium foil, it mainly solves the aluminium foil that prior art produces and has all more difficult necessary requirements that reaches such as surface quality, dimensional accuracy, strip shape quality, and percent defective is high and Fe, that Si content is controlled is improper, can't meet the problem of the requirement of the direct typographical printing use of computer aluminium foil Surface Quality.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
The production method of aluminium foil for the direct typographical printing of a kind of computer of the present invention is characterized in that described method comprises the following steps:
(1) melting, casting-rolling technology:
A. drop into the fine aluminium ingot melting material of purity more than 99.70%, do not allow to add waste material;
B. carry out melting in smelting furnace, interpolation alloy after melting completes, Fe must add intermediate alloy, and standing rear input refining agent carries out refining, adjusts nitrogen pressure during refining, guarantees that the height that nitrogen blows afloat aluminium liquid is no more than 15cm, and refining completes after 5 minutes and skims;
C. aluminium liquid is fallen to stove to standing furnace, fall after stove completes to start the injection refining machine aluminium liquid in standing furnace is carried out to repeatedly refining, need equally to adjust pressure and guarantee that the aluminium liquid height blown afloat is no more than 15cm, skim after each refining finishes, refining at regular intervals once;
D. adopt high pure nitrogen to carry out degasification to aluminium liquid, adjust the graphite rotator rotating speed, guarantee the hydrogen content≤0.11ml/100gAL of aluminium liquid; For controlling hydrogen content≤0.11ml/100gAl, adopt the online refinery by de-gassing system of SNIF, and nitrogen gas purity requires to reach more than 99.995%, nitrogen pressure is between 0.3-0.4MPa.
E. in degassing procedure, with certain speed, to aluminium liquid, add fining agent to reach the effect of crystal grain thinning.
F. adopt filter to carry out deslagging filtering to aluminium liquid.
G. aluminium liquid enters in front case, adjusts cooling water pressure, carries out casting through Casting Roller, then batches rolling by devices for taking-up; Strict control cast strip is horizontal, the longitudinal thickness deviation, guarantees transverse gage deviation≤0.02mm, longitudinal thickness deviation≤0.1mm, and convexity is between 0.02-0.05mm; Transverse plate forms parabola shaped, from middle, to both sides thickness attenuate gradually, does not allow to occur " M " type or " W " type.
(2) cold-rolling process:
Parameter during a. to the cold roll grinding is controlled.Adopt the irreversible cold-rolling mill rolling of 1,850 four roller, backing roll is ground to plain-barreled roll, cylindricity reaches 0.01mm, working roll cylindricity 0.005, in top working roll, height is 0.04mm, bottom working roll is plain-barreled roll, the working roll roughness is 0.32 ± 0.02mm, allowance control, can only just maybe bearing, has not allowed positive and negative beating, double-working diameter deviation≤0.01mm.
B. utilize cold-rolling mill to be depressed cold rolling coil cold rolling, spray ROLLING OIL when cold rolling and carry out cooling and lubricating, controlled rolling speed.The number of times of depressing is more than 6 times, and the thickness of at every turn depressing accounts for depresses 25～45% of front gross thickness; Require in the operation of rolling not allow to occur the dendritic tissue of pine tree, do not allowed load mould, wiped scuffing etc.Cold rolling drafts is optimized, finds that the surface of cold rolling coil is best, there is no surface chromatic aberration, the dendritic decorative pattern of pine tree etc. when rolling schedule is depressed by above-mentioned passage.
(3) paper tinsel roll process:
A. parameter during roll dressing is controlled.Adopt the irreversible cold foil mill of 1,650 four roller to be rolled, for guaranteeing camber, glacing flatness and the fineness after roll on aluminium volume surface, it is 0.07mm that the present invention controls high in top working roll, the poor 0.001mm that is less than of the diameter at body of roll two ends, cylindricity is controlled at 0.005mm, and surface roughness is Ra0.2 ± 0.01um.
B. the paper tinsel process of rolling utilizes foil mill to be rolled band, sprays ROLLING OIL and carries out cooling and lubricating, and the operation of rolling is controlled the front and back tension force of band, the size of mill speed.Do not carry out intermediate annealing due to aluminium volume before cold rolling, cause aluminium volume interior tissue internal stress larger.Thereby the thickness of depressing during rolling accounts for 15% left and right of depressing front gross thickness at every turn, can guarantee carrying out smoothly of rolling.
Should strictly control the thickness deviation of aluminium volume in the paper tinsel operation of rolling, guarantee the good of plate shape.
(4) degrease, straightening process
A. select the aligning unit based on the pure extension straightening technology to be aligned aluminium strip.Before aligning, the production board face is cleaned, during cleaning, product passes through respectively pre-oil removing cleaning case, alkali cleaning case and rinse tank, and the parameters by strict control aligning unit (as the temperature of rinse water temperature, baking oven, rinse water acid-base value, brush roll rotating speed, unit operation speed etc.) reaches the purpose that improves product surface quality.Feed back to corresponding plat control system by the detected board form data of online detecting instrument of flatness, elasticity difference according to supplied materials actual plate shape, the expansion proportionality coefficient by automatic each section of adjustment expansion flattening roller by plat control system, control the roll coil of strip with this and reach target call through the plate shape of aligning again.
B. go out finished product after aligning.
As preferably, in described step (1) b, the time of melting is 4-5 hour, and the temperature of melting is not higher than 760 ℃, and after melting, the standing time is 20-30 minute.Smelting time is the ability according to equipment, and smelting temperature is selected not higher than 760 ℃, can guarantee carrying out smoothly of melting, can prevent again the melt burning, standing 20-30 minute after melting, and the melt temperature homogenising makes composition more even simultaneously.
As preferably, the time to the each refining of aluminium liquid in standing furnace in described step (1) c is 15-20 minute, after standing 5-10 minute, skims, and every 1.5-2 hour refining once.The refining of 15-20 minute can effectively reduce the dregginess of melt inside, and refining once in 1.5-2 hour had not only guaranteed the uniformity of composition but also further guaranteed the cleannes of melt.
As preferably, in described step (1) d, the rotating speed of graphite rotator is 300-400r/min.In this speed, can effectively reduce the hydrogen content in melt, guarantee the inside quality of aluminium strip woollen.
As preferably, adopt one-level Al-Ti-B silk in described step (1) e, the feed speed of titanium silk is 250mm/min, guarantees grain structure evenly fine and closely woven of Casting Rolled Sheet inside, Casting Rolled Sheet two sides grain size is one-level.
As preferably, in described step (1) f, Rose Box adopts double-layer filter plate, and filter is 50 orders, and guarantees that Rose Box is without bypass, guarantees the effect of slagging-off.
As preferably, in described step (1) g the Casting Roller grinding require in height be controlled at 0.1-0.2mm, middle high symmetry is at 0.005-0.01mm, roughness is controlled at 0.8um, the roll cylindricity is controlled at 0.005mm, the roller footpath is not less than 670mm; Front case temperature is controlled at 695-705 ℃, and front case liquid level 14-18mm, roll section length and be made as 45-50mm, and roll casting speed is controlled at 0.8-1.0m/min, controls cooling water pressure between 0.3-0.4MPa.Strictly control above technological parameter, can effectively control plate shape and the internal soundness of casting woollen.
As preferably, the ROLLING OIL viscosity in described step (2) b is 2.3-2.5mm
2/ s, acid number≤0.05mgKOH/g, hydroxyl value is 9-11mgKOH/g, saponification number is 3-5mgKOH/g.The cleaning equipment of ROLLING OIL is transformed simultaneously, made the ROLLING OIL light transmittance be reached for one-level; Mill speed is controlled at 450～650m/min, and controlled rolling speed can effectively prevent the string layer, improves the surface quality of aluminium volume.
As preferably, the ROLLING OIL viscosity in described step (3) b is 1.85-1.95mm
2/ s, acid number≤0.08mgKOH/g, hydroxyl value is 1.5-3mgKOH/g, saponification number is 6-7mgKOH/g.Roll the optimization of ROLLING OIL for paper tinsel.Rolling oil additives very little, can cause film strength inadequate, partial fracture, thus load mould and bright wisp appear.And additive is too many, cause viscosity too large, can cause the film distribution inequality, ROLLING OIL purges unclean, affects plate face quality.
As preferably, in described step (3) b, drafts is 0.35mm → 0.27mm → 0.18mm → 0.14
Mm; Average mill speed is controlled at 450-550m/min.This mill speed can do not affect roll after in the scope of surface quality of aluminium volume, guarantee the production efficiency of aluminium volume.
As preferably, in the middle operation of rolling of described step (3), for the control of tension force and roll-force, require backward pull will be controlled at 2.5-3.5Kg/mm
2Scope, forward pull will be controlled at 3.5-4.5 Kg/mm
2Scope, the variation of tension force not only can cause broken belt too much, and can affect surface quality.Roll-force is poor is the depth of parallelism of reflection milling train and the index of concentricity, it is also the inhomogeneity index of reflection aluminum foil thickness, and the inequality of thickness will have a strong impact on the serviceability of the direct typographical printing of computer with aluminium foil, so roll-force is poor, must be controlled in 5 tons.
As preferably, in described step (3), adopt the thickness reponse system to control the thickness deviation of aluminium volume, adopt the template instrument to guarantee the plate shape of aluminium volume.The finished product thickness of strip tolerance that the present invention produces is within ± 3%, and band is smooth, band off-line glacing flatness≤10I, Bao， both sides, slightly thick both sides, centre symmetrically, apleuria wave, side wave and middle deals shape.
As preferably, the PL800 that described step (4) a adopts Sai Lima company involves in to aluminium containing the pure extension aligning unit of degrease that row cleans, aligning.This unit has been installed the expansion flattening roller that obtains technical patent, and this flattening roller is divided into 9 sections, and every section is comprised of the chamber that can control respectively its free-extension expansion.According to the elasticity difference of supplied materials actual plate shape, then the expansion proportionality coefficient that is passed through automatically to adjust each section of expansion flattening roller by plat control system is controlled the roll coil of strip with this and is reached target call through the plate shape of aligning from 0-100.
The pure extension technology is the current whole world state-of-the-art plate shape tension straingtening technology, but to be the flexible of expansion flattening roller by free wxpansion apply radial tension to aluminum strip attached to it for it, thereby produce stretching action, makes product produce plastic deformation.Simultaneously, the flexible of expansion roller can carry out in segmentation, on the width of sheet material, sheet material is divided into to several intervals, then according to the actual conditions of incoming profile, the coefficient of expansion of each section of expansion roller regulated respectively.To actual plate shape, tighter zone increases the expansion roller to the coefficient of expansion that should section, to actual plate shape, more loose zone reduces to expand roller to the coefficient of expansion that should section, thereby incoming profile is greatly improved after the pure extension of overexpansion roller, thereby obtains the good profile that flatness is high.Or tension force strong with domestic traditional stretch bending is rectified and is compared, and the pure extension technology is except carrying out also having the another one characteristics the aligning of subregion to production board shape.Traditional stretch bending is rectified or tension force is strong all will be aligned product by one group of very little replaceable straightening roller system of diameter, and this kind of replaceable straightening roller system because of when product is aligned and the contact area of product very little, so can produce very large pressure to product surface when aligning.Under the effect of this high pressure, the aluminium ash that product surface is difficult to clean up just be easy to be bonded on smoothing roll and along with the aligning process constantly carry out more long-pending larger, when the aluminium ash becomes graininess greatly to a certain extent, under the high pressure effect of smoothing roll, on the plate face, will form load mould in the aligning zone.But adopt the pure extension technology just not have this phenomenon, because the diameter of expansion roller is large, when product is stretched, contact area is large, and it is very little that relative pressure just becomes, at this, under less pressure-acting, the aluminium ash is difficult to condense into piece, thereby in the generation of fundamentally having stopped load mould.
While moving this aligning unit, band will first pass through three cleaning cases and a baking oven.At first the pre-oil removing cleaning case of process, the rinse water lower with pH value cleaned the strip material plate face, in advance except a part of surface band oil.Enter afterwards the alkali cleaning case, the alkali lye higher with pH value carries out alkali cleaning, and the ROLLING OIL of plate face remnants is cleaned up.Finally enter rinse tank, with clear water, carry out rinsing, the ROLLING OIL and the alkali lye that remain on the plate face are cleaned up.During cleaning, water temperature is not less than 60 ℃, the temperature baking temperature of baking oven is not less than 80 ℃, the pH value of cleaning fluid is 10-12, the rotating speed of brush roll is 1500-2000m/min, machine row speed is 150-200m/min, can guarantee glacing flatness and surface quality that band is higher, reduce the blemish of band, can make again production efficiency effectively improve.The strip surface that this invention is produced is clean, smooth, and the horizontal coarse scope in surface is between 0.18um-0.24um, and plate face glacing flatness is in 5I.
Therefore, the direct typographical printing of the computer that the present invention produces can obtain good control with surface quality and the strip shape quality of aluminium foil, and can effectively guarantee the dimensional accuracy of product, can meet high-grade printing to printing plate-based requirement.
The specific embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.
Embodiment 1: the production method of aluminium foil for the direct typographical printing of a kind of computer of this example the steps include:
(1) melting, casting-rolling technology:
A. dropping into purity is the fine aluminium ingot melting material more than 99.70%, does not allow to add waste material;
B. carry out melting in smelting furnace, the time of melting is 4 hours, the temperature of melting is 760 ℃, the corresponding alloy of interpolation after melting completes, drop into refining agent after standing 20 minutes and carry out refining, adjust nitrogen pressure during refining, guarantee that the height that nitrogen blows afloat aluminium liquid is no more than 15cm, refining time is 20 minutes, after refining completes, skims;
C. aluminium liquid is fallen to stove to standing furnace, the temperature in while falling the stove is no more than 740 ℃, the standing furnace temperature is 730 ℃, fall after stove completes to start the injection refining machine aluminium liquid in standing furnace is carried out to repeatedly refining, and adjustment pressure, guarantee that the height that nitrogen blows afloat aluminium liquid is no more than 15cm, every refining in 1.5 hours once, each refining time is 15 minutes, after standing 5 minutes, skims;
D. adopt 99.995% high pure nitrogen to carry out degasification to aluminium liquid, adjusting the graphite rotator rotating speed is 300r/min, guarantees the hydrogen content≤0.11ml/100gAl of aluminium liquid;
E. the speed with 250m/min passes into the Al-Ti-B silk in the aluminium liquid of degasification tank, guarantees that Casting Rolled Sheet two sides grain size is one-level.
F. adopt 50 purpose double-layer filter plates to be filtered aluminium liquid.
G. aluminium liquid is sent in front case, and the adjustment cooling water pressure is 0.3MPa, through Casting Roller, carries out casting, batch rolling by devices for taking-up again, during the Casting Roller grinding requires, height is controlled at 0.1mm, and middle high symmetry is at 0.005mm, roughness is 0.8um, and the roll cylindricity reaches 0.005mm; Front case temperature is controlled at 695 ℃, and front case liquid level 15mm, roll section length and be made as 45mm, and roll casting speed is controlled at 1m/min, controls thus plate shape and the internal soundness of casting woollen.
(2) cold-rolling process:
A. cold roll is carried out to grinding, adopt 1850 cold-rolling mill rollings, backing roll is ground to plain-barreled roll, cylindricity reaches 0.01mm, working roll cylindricity 0.005mm, and in top working roll, height is 0.04mm, bottom working roll is plain-barreled roll, working roll roughness 0.30mm, two roller diameter deviation 0.01mm;
B. utilize cold-rolling mill to be depressed cold rolling coil cold rolling, spray ROLLING OIL when cold rolling and carry out cooling and lubricating, controlling average mill speed is 400m/min.Rolling pass is that 7.0mm → 3.8mm → 2.4mm → 1.45mm is put rolling → 0.95mm → 0.58mm → 0.35mm after 24 hours, places after 24 hours trimming wide to 1050mm, and the cast-rolling stock that the 7.0mm of take is thick is example, and drafts is as shown in the table:
| Passage | 1 | 2 | 3 | 4 | 5 | 6 |
| Supplied materials thickness (mm) | 7.00 | 3.8 | 2.40 | 1.45 | 0.95 | 0.58 |
| Finished product thickness (mm) | 3.80 | 2.40 | 1.45 | 0.95 | 0.58 | 0.35 |
| Absolute draft amount (%) | 3.20 | 1.40 | 0.95 | 0.5 | 0.37 | 0.23 |
| Relative reduction (%) | 45.71 | 36.84 | 39.58 | 34.48 | 38.95 | 39.66 |
| General working rate (%) before final pass | 0.00 | 45.71 | 65.71 | 79.29 | 86.43 | 91.71 |
| General working rate after final pass (%) | 45.71 | 65.71 | 79.29 | 86.43 | 91.71 | 95.00 |
(3) paper tinsel roll process:
A. parameter during roll dressing is controlled.Adopt 1650 foil mills, for guaranteeing that camber, glacing flatness and fineness after roll on aluminium volume surface reach requirement, it is 0.06mm, the poor 0.001mm that is less than of the diameter at body of roll two ends that the present invention controls high in roll, cylindricity is controlled at 0.005mm, and surface roughness is 0.2um.
B. utilize foil mill to carry out paper tinsel to aluminium strip and roll, paper tinsel rolls in process and adds ROLLING OIL, and the rolling oil viscosity is 1.85mm
2/ s, the number of times of depressing is 3 times, and average speed is 450m/min, and the finished product that the 0.14mm of take is thick is example, and drafts is as shown in the table:
| Passage | 1 | 2 | 3 |
| Supplied materials thickness (mm) | 0.35 | 0.27 | 0.18 |
| Finished product thickness (mm) | 0.27 | 0.18 | 0.14 |
| Absolute draft amount (%) | 0.08 | 0.09 | 0.04 |
| Relative reduction (%) | 22.86 | 33.33 | 28.57 |
| General working rate (%) before final pass | 0.00 | 22.86 | 48.57 |
| General working rate after final pass (%) | 22.86 | 48.57 | 60.00 |
(4) degrease, straightening process
A. the PL800 that adopts Sai Lima company involves in to aluminium containing the pure extension aligning unit of degrease that row cleans, aligning.This unit has been installed the expansion flattening roller that obtains technical patent, and this flattening roller is divided into 9 sections, and every section is comprised of the chamber that can control respectively its free-extension expansion.When supplied materials is middle deals shape, suitably dwindle the coefficient of expansion of interlude and increase the coefficient of expansion of both sides section, reach the purpose of stretching plate shape with this.While moving this aligning unit, band will first pass through three cleaning cases and a baking oven.At first the pre-oil removing cleaning case of process, the rinse water lower with pH value cleaned the strip material plate face, in advance except a part of band oil.Enter afterwards the alkali cleaning case, the alkali lye higher with pH value carries out alkali cleaning, and the ROLLING OIL of plate face remnants is cleaned up.Finally enter rinse tank, with clear water, carry out rinsing, the alkali lye remained on the plate face is cleaned up.During cleaning, water temperature is 60 ℃, the temperature baking temperature of baking oven is 80 ℃, the pH value of cleaning fluid is 10, the rotating speed of brush roll is 2000m/min, machine row speed is 160m/min, under this technological parameter, can guarantee glacing flatness and surface quality that band is higher, reduce the blemish of band, can make again production efficiency effectively improve.The strip surface that this invention is produced is clean, smooth, and the horizontal coarse scope in surface is at 0.18um-0.24um, and plate face glacing flatness is in 5I.
B. batch, check, pack after the aligning and go out finished product.
Embodiment 2: a kind of production method of base with aluminium strip of printing of this example the steps include:
(1) melting, casting-rolling technology:
A. drop into the fine aluminium ingot melting material of purity more than 99.70%, do not allow to add waste material;
B. carry out melting in smelting furnace, the time of melting is 4.5 hours, the temperature of melting is 750 ℃, the corresponding alloy of interpolation after melting completes, drop into refining agent after standing 20 minutes and carry out refining, adjust nitrogen pressure during refining, guarantee that the height that nitrogen blows afloat aluminium liquid is no more than 15cm, refining time is 25 minutes, after refining completes, skims;
C. aluminium liquid is sent into to standing furnace and fallen stove, while falling the stove, the temperature temperature is 740 ℃, the standing furnace temperature is 730 ℃, fall after stove completes to start the injection refining machine aluminium liquid in standing furnace is carried out repeatedly refining and adjusts pressure, guarantee that the height that nitrogen blows afloat aluminium liquid is no more than 15cm, each refining time is not less than 15 minutes, after standing 5 minutes, skim, every refining in 2 hours once;
D. adopt 99.995% high pure nitrogen to carry out degasification to aluminium liquid, adjusting the graphite rotator rotating speed is 350r/min, guarantees the hydrogen content≤0.11ml/100gAL of aluminium liquid;
E. the Al-Ti-B silk that the speed that passes into is 250m/min, guarantee that Casting Rolled Sheet two sides grain size is one-level.
F. adopt 50 purpose double-layer filter plates to be filtered aluminium liquid;
G. aluminium liquid is sent in front case, adds hydraulic pressure, by Casting Roller, carries out casting, then coils into cold rolling coil by devices for taking-up, and during the Casting Roller grinding requires, height is controlled at 0.15mm, and middle high symmetry is at 0.01mm, and roughness is 0.85um, and the roll cylindricity reaches 0.01mm; Front case temperature is controlled at 700 ℃, and front case liquid level 15mm, roll section length and be made as 48mm, and roll casting speed is controlled at 1.0mm/min, controls cooling water pressure at 0.35Mpa;
(2) cold-rolling process:
A. cold roll is carried out to grinding, adopt 1850 cold-rolling mill rollings, backing roll is ground to plain-barreled roll, cylindricity reaches 0.01mm, working roll cylindricity 0.005mm, and in top roll, height is 0.04mm, lower roll is plain-barreled roll, working roll roughness 0.34mm, two roller diameter deviation 0.01mm;
B. utilize cold-rolling mill to be depressed cold rolling coil cold rolling, add ROLLING OIL when cold rolling, controlled rolling speed is 330m/min.Rolling pass is that 7.0mm → 3.8mm → 2.4mm → 1.45mm is put rolling → 0.95mm → 0.58mm → 0.35mm after 24 hours, places trimming after 24 hours and rolls to paper tinsel to 1050mm is wide, and the cast-rolling stock that the 7 ± 0.2mm of take is thick is example, and drafts is as shown in the table:
| Passage | 1 | 2 | 3 | 4 | 5 | 6 |
| Supplied materials thickness (mm) | 7.00 | 3.8 | 2.40 | 1.45 | 0.95 | 0.58 |
| Finished product thickness (mm) | 3.80 | 2.40 | 1.45 | 0.95 | 0.58 | 0.35 |
| Absolute draft amount (%) | 3.20 | 1.40 | 0.95 | 0.5 | 0.37 | 0.23 |
| Relative reduction (%) | 45.71 | 36.84 | 39.58 | 34.48 | 38.95 | 39.66 |
| General working rate (%) before final pass | 0.00 | 45.71 | 65.71 | 79.29 | 86.43 | 91.71 |
| General working rate after final pass (%) | 45.71 | 65.71 | 79.29 | 86.43 | 91.71 | 95.00 |
(3) paper tinsel roll process:
A. the control of roller parameter.Adopt 1650 foil mills, for guaranteeing camber, glacing flatness and the fineness after roll on aluminium volume surface, it is 0.06mm that the present invention controls high in roll, the poor 0.001mm that is less than of the diameter at body of roll two ends, and cylindricity is controlled at 0.005mm, and surface roughness is 0.24um;
B. utilize foil mill to carry out paper tinsel to aluminium strip and roll, paper tinsel rolls in process and adds ROLLING OIL, and the number of times of depressing is 3 times, and average speed is 500m/min, and the finished product that the 0.14mm of take is thick is example, and drafts is as shown in the table:
| Passage | 1 | 2 | 3 |
| Supplied materials thickness (mm) | 0.35 | 0.27 | 0.18 |
| Finished product thickness (mm) | 0.27 | 0.18 | 0.14 |
| Absolute draft amount (%) | 0.08 | 0.09 | 0.04 |
| Relative reduction (%) | 22.86 | 33.33 | 28.57 |
| General working rate (%) before final pass | 0.00 | 22.86 | 48.57 |
| General working rate after final pass (%) | 22.86 | 48.57 | 60.00 |
(4) degrease, straightening process:
A. the PL800 that adopts Sai Lima company involves in to aluminium containing the pure extension aligning unit of degrease that row cleans, aligning.This unit has been installed the expansion flattening roller that obtains technical patent, and this flattening roller is divided into 9 sections, and every section is comprised of the chamber that can control respectively its free-extension expansion.When supplied materials is both sides deals shape, suitably dwindle the coefficient of expansion of both sides section and increase the coefficient of expansion of interlude, reach the purpose of stretching plate shape with this.While moving this aligning unit, band will first pass through three cleaning cases and a baking oven.At first the pre-oil removing cleaning case of process, the rinse water lower with pH value cleaned the strip material plate face, in advance except a part of band oil.Enter afterwards the alkali cleaning case, the alkali lye higher with pH value carries out alkali cleaning, and the ROLLING OIL of plate face remnants is cleaned up.Finally enter rinse tank, with clear water, carry out rinsing, the alkali lye remained on the plate face is cleaned up.During cleaning, water temperature is 70 ℃, the temperature baking temperature of baking oven is 90 ℃, the pH value of cleaning fluid is 11, the rotating speed of brush roll is 1800m/min, machine row speed is 180m/min, under this technological parameter, can guarantee glacing flatness and surface quality that band is higher, reduce the blemish of band, can make again production efficiency effectively improve.The strip surface that this invention is produced is clean, smooth, and the horizontal coarse scope in surface is at 0.18um-0.24um, and plate face glacing flatness is in 5I.
B. go out finished product after the straightener aligning.
Embodiment 3: a kind of production method of base with aluminium strip of printing of this example the steps include:
(1) melting, casting-rolling technology:
A. drop into the fine aluminium ingot melting material of purity more than 99.70%, do not allow to add waste material;
B. carry out melting in smelting furnace, the time of melting is 6 hours, the temperature of melting is 740 ℃, the corresponding alloy of interpolation after melting completes, drop into refining agent after standing 20 minutes and carry out refining, adjust nitrogen pressure during refining, guarantee that the height that nitrogen blows afloat aluminium liquid is no more than 15cm, refining time is no less than 20 minutes, after refining completes, skims;
C. aluminium liquid is sent into to standing furnace and fallen stove, while falling the stove, temperature can not surpass the upper limit of smelting temperature, the standing furnace temperature is 740 ℃, fall after stove completes to start the injection refining machine aluminium liquid in standing furnace is carried out repeatedly refining and adjusts pressure, guarantee that the height that nitrogen blows afloat aluminium liquid is no more than 15cm, each refining time is not less than 15 minutes, after standing 5 minutes, skim, every refining in 2 hours once;
D. adopt 99.995% high pure nitrogen to carry out degasification to aluminium liquid, adjusting the graphite rotator rotating speed is 400r/min, guarantees the hydrogen content≤0.11ml/100gAL of aluminium liquid;
E. the Al-Ti-B silk that the speed that passes into is 250m/min, guarantee that Casting Rolled Sheet two sides grain size is one-level.
F. adopt 50 purpose double-layer filter plates to be filtered aluminium liquid;
G. aluminium liquid is sent in front case, adds hydraulic pressure, by Casting Roller, carries out casting, then coils into cold rolling coil by devices for taking-up, and during the Casting Roller grinding requires, height is controlled at 0.15mm, and middle high symmetry is at 0.01mm, and roughness is 0.85um, and the roll cylindricity reaches 0.01mm; Front case temperature is controlled at 700 ℃, and front case liquid level 15mm, roll section length and be made as 48mm, and roll casting speed is controlled at 1.0mm/min, controls cooling water pressure at 0.35Mpa;
(2) cold-rolling process:
A. cold roll is carried out to grinding, adopt 1850 cold-rolling mill rollings, backing roll is ground to plain-barreled roll, cylindricity reaches 0.01mm, working roll cylindricity 0.005mm, and in top roll, height is 0.04mm, lower roll is plain-barreled roll, working roll roughness 0.32mm, two roller diameter deviation 0.01mm;
B. utilize cold-rolling mill to be depressed cold rolling coil cold rolling, add ROLLING OIL when cold rolling, controlled rolling speed is 330m/min.Rolling pass is that 7.0 → 3.8 → 2.4 → 1.45mm is put rolling → 0.95 → 0.58 → 0.35mm after 24 hours, places trimming after 24 hours and rolls to paper tinsel afterwards to 1050mm is wide, and the cast-rolling stock that the 7 ± 0.2mm of take is thick is example, and drafts is as shown in the table:
| Passage | 1 | 2 | 3 | 4 | 5 | 6 |
| Supplied materials thickness (mm) | 7.00 | 3.8 | 2.40 | 1.45 | 0.95 | 0.58 |
| Finished product thickness (mm) | 3.80 | 2.40 | 1.45 | 0.95 | 0.58 | 0.35 |
| Absolute draft amount (%) | 3.20 | 1.40 | 0.95 | 0.5 | 0.37 | 0.23 |
| Relative reduction (%) | 45.71 | 36.84 | 39.58 | 34.48 | 38.95 | 39.66 |
| General working rate (%) before final pass | 0.00 | 45.71 | 65.71 | 79.29 | 86.43 | 91.71 |
| General working rate after final pass (%) | 45.71 | 65.71 | 79.29 | 86.43 | 91.71 | 95.00 |
(3) paper tinsel roll process:
A. the control of roller parameter.Adopt 1650 foil mills, for guaranteeing camber, glacing flatness and the fineness after roll on aluminium volume surface, it is 0.06mm that the present invention controls high in roll, the poor 0.001mm that is less than of the diameter at body of roll two ends, and cylindricity is controlled at 0.005mm, and surface roughness is 0.2um;
B. utilize foil mill to carry out paper tinsel to aluminium strip and roll, paper tinsel rolls in process and adds ROLLING OIL, and the number of times of depressing is 3 times, and speed is 500m/min, and the finished product that the 0.14mm of take is thick is example, and drafts is as shown in the table:
| Passage | 1 | 2 | 3 |
| Supplied materials thickness (mm) | 0.35 | 0.27 | 0.18 |
| Finished product thickness (mm) | 0.27 | 0.18 | 0.14 |
| Absolute draft amount (%) | 0.08 | 0.09 | 0.04 |
| Relative reduction (%) | 22.86 | 33.33 | 28.57 |
| General working rate (%) before final pass | 0.00 | 22.86 | 48.57 |
| General working rate after final pass (%) | 22.86 | 48.57 | 60.00 |
(4) degrease, straightening process
A. the PL800 that adopts Sai Lima company involves in to aluminium containing the pure extension aligning unit of degrease that row cleans, aligning.This unit has been installed the expansion flattening roller that obtains technical patent, and this flattening roller is divided into 9 sections, and every section is comprised of the chamber that can control respectively its free-extension expansion.When supplied materials is both sides of the chest deals shape, suitably dwindle the coefficient of expansion of both sides of the chest and increase the coefficient of expansion of limit section and interlude, reach the purpose of stretching plate shape with this.While moving this aligning unit, band will first pass through three cleaning cases and a baking oven.At first the pre-oil removing cleaning case of process, the rinse water lower with pH value cleaned the strip material plate face, in advance except a part of band oil.Enter afterwards the alkali cleaning case, the alkali lye higher with pH value carries out alkali cleaning, and the ROLLING OIL of plate face remnants is cleaned up.Finally enter rinse tank, with clear water, carry out rinsing, the alkali lye remained on the plate face is cleaned up.During cleaning, water temperature is 80 ℃, the temperature baking temperature of baking oven is 90 ℃, the pH value of cleaning fluid is 12, the rotating speed of brush roll is 1500m/min, machine row speed is 200m/min, under this technological parameter, can guarantee glacing flatness and surface quality that band is higher, reduce the blemish of band, can make again production efficiency effectively improve.The strip surface that this invention is produced is clean, smooth, and the horizontal coarse scope in surface is at 0.18um-0.24um, and plate face glacing flatness is in 5I.
B. after aligning the unit aligning, go out finished product.
Claims (12)
1. the production method of aluminium foil for the direct typographical printing of a computer is characterized in that described method comprises the following steps:
(1) melting, casting-rolling technology:
A. drop into the fine aluminium ingot melting material of purity more than 99.70%, do not allow to add waste material;
B. carry out melting in smelting furnace, interpolation alloy after melting completes, standing rear input refining agent carries out refining, adjusts nitrogen pressure during refining, after refining completes, skims;
C. aluminium liquid is fallen to stove to standing furnace, fall after stove completes to start the injection refining machine aluminium liquid in standing furnace is carried out repeatedly refining and adjusts pressure, skim after each refining finishes, refining at regular intervals once;
D. adopt high pure nitrogen to carry out degasification to aluminium liquid, adjust the graphite rotator rotating speed, guarantee the hydrogen content≤0.11ml/100gAL of aluminium liquid;
Pass into the fining agent of certain speed to reach the effect of crystal grain thinning e. in degassing procedure aluminium liquid;
F. adopt filter to carry out deslagging filtering to aluminium liquid;
G. aluminium liquid is sent in front case, adds hydraulic pressure, by Casting Roller, carries out casting, then batches rolling by devices for taking-up;
(2) cold-rolling process:
A. breaker roll carries out grinding process;
B. utilize cold-rolling mill to be depressed cold rolling coil cold rolling, spray ROLLING OIL when cold rolling, rolling pass is more than 6 times, and draught per pass accounts for the 35-45% of the front gross thickness of rolling;
(3) paper tinsel roll process:
A. breaker roll carries out grinding process;
B. utilize foil mill to carry out paper tinsel to aluminium strip and roll, paper tinsel rolls in process and adds ROLLING OIL, and the number of times of depressing is 3 times, and the thickness of at every turn depressing accounts for the 20-30% that depresses front gross thickness;
(4) degrease, straightening process:
A. the aluminium strip after paper tinsel being rolled is the pre-oil removing cleaning case of process at first, the rinse water lower with pH value cleaned the strip material plate face, in advance except a part of surface band oil, enter afterwards the alkali cleaning case, the alkali lye higher with pH value carries out alkali cleaning, the ROLLING OIL of plate face remnants is cleaned up, finally enter rinse tank, carry out rinsing with clear water, the ROLLING OIL and the alkali lye that remain on the plate face are cleaned up, during cleaning, water temperature is not less than 60 ℃, the temperature baking temperature of baking oven is not less than 80 ℃, carry out tension straingtening after degrease, the flattening roller of tension straingtening is divided into 9 sections, every section is comprised of the chamber that can control respectively its free-extension expansion, elasticity difference according to supplied materials actual plate shape, pass through automatically to adjust the expansion proportionality coefficient of each section of expansion flattening roller from 0-100 by plat control system again, control the roll coil of strip with this and reach target call through the plate shape of aligning,
B. go out finished product after aligning.
2. the production method of aluminium foil for the direct typographical printing of computer according to claim 1, is characterized in that the time of melting in described step (1) b is 4-6 hour, and the temperature of melting is 740-760 ℃, and after melting, the standing time is 20-30 minute.
3. the production method of aluminium foil for the direct typographical printing of computer according to claim 1, it is characterized in that in described step (1) c that the time to the each refining of aluminium liquid in standing furnace is 15-20 minute, after standing 5-10 minute, skim, every 1.5-2 hour refining once.
4. the production method of aluminium foil for the direct typographical printing of computer according to claim 1, is characterized in that the rotating speed of graphite rotator in described step (1) d is 300-400r/min.
5. the production method of aluminium foil for the direct typographical printing of computer according to claim 1, is characterized in that in described step (1) e adopting the Al-Ti-B silk, and the speed of titanium silk is 250m/min.
6. the production method of aluminium foil for the direct typographical printing of computer according to claim 1, is characterized in that described step (1) f Rose Box adopts double-layer filter plate, and filter is 50 orders.
7. the production method of aluminium foil for the direct typographical printing of computer according to claim 1, it is characterized in that in described step (1) g the Casting Roller grinding require in height be controlled at 0.1-0.2mm, middle high symmetry is at 0.005-0.01mm, roughness is controlled at 0.8um, the roll cylindricity is controlled at 0.005mm, and the roller footpath is not less than 670mm; Front case temperature is controlled at 695-705 ℃, and front case liquid level 14-18mm, roll section length and be made as 45-50mm, and roll casting speed is controlled at 0.8-1.0mm/min, controls cooling water pressure between 0.3-0.4Mpa.
8. the production method of aluminium foil for the direct typographical printing of computer according to claim 1, is characterized in that the ROLLING OIL viscosity in described step (2) b is 2.3-2.5mm
2/ s, acid number≤0.05mgKOH/g, hydroxyl value is 9-11mgKOH/g, saponification number is 3-5mgKOH/g.
9. the production method of aluminium foil for the direct typographical printing of computer according to claim 1, is characterized in that the ROLLING OIL viscosity in described step (3) b is 1.85-1.95mm
2/ s, acid number≤0.08mgKOH/g, hydroxyl value is 1.5-3.0mgKOH/g, saponification number is 6.0-7.0mgKOH/g.
10. the production method of aluminium foil for the direct typographical printing of computer according to claim 1, is characterized in that the thickness of depressing for the last time in described step (3) b accounts for the 20-30% that depresses front gross thickness, and speed is 450-550m/min.
11. the production method of aluminium foil for the direct typographical printing of computer according to claim 1, is characterized in that the tension force that in described step (3) b, milling train carries out before paper tinsel rolls aluminium foil is 2.5-3.5Kg/mm
2, the tension force after paper tinsel rolls is 3.5-4.5Kg/mm
2.
12. the production method of aluminium foil for the direct typographical printing of computer according to claim 1, is characterized in that in described step (4) a selecting PL800 to contain the pure stretcher leveling unit of degrease.
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| CN114472523B (en) * | 2022-01-26 | 2024-03-19 | 永杰新材料股份有限公司 | Preparation method of high-brightness aluminum plastic film aluminum foil and aluminum plastic film aluminum foil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069431A (en) * | 1991-08-17 | 1993-03-03 | 北京科技大学 | The cold-rolling process of high pure aluminium foil for electrolytic capacitor |
| CN1254624A (en) * | 1998-11-20 | 2000-05-31 | 西北铝加工厂 | Method and technique for producing aluminium foils by direct casting and rolling of electrolytic aluminium liquid |
| CN102234750A (en) * | 2011-06-16 | 2011-11-09 | 东南铝业（中国）有限公司 | Production method of aluminum foil for lithium battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63295006A (en) * | 1987-05-26 | 1988-12-01 | Sumitomo Light Metal Ind Ltd | Manufacture of extra thin aluminium foil |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069431A (en) * | 1991-08-17 | 1993-03-03 | 北京科技大学 | The cold-rolling process of high pure aluminium foil for electrolytic capacitor |
| CN1254624A (en) * | 1998-11-20 | 2000-05-31 | 西北铝加工厂 | Method and technique for producing aluminium foils by direct casting and rolling of electrolytic aluminium liquid |
| CN102234750A (en) * | 2011-06-16 | 2011-11-09 | 东南铝业（中国）有限公司 | Production method of aluminum foil for lithium battery |
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