CN102553920B - Production method of aluminum tape for base of printing plate - Google Patents
Production method of aluminum tape for base of printing plate Download PDFInfo
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- CN102553920B CN102553920B CN201110439484.6A CN201110439484A CN102553920B CN 102553920 B CN102553920 B CN 102553920B CN 201110439484 A CN201110439484 A CN 201110439484A CN 102553920 B CN102553920 B CN 102553920B
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Abstract
The invention relates to a production method of aluminum tapes and in particular relates to a production method of an aluminum tape which is used for the base of a printing plate. The invention aims to solve the problems in the prior art that the aluminum tape products for printing plate bases have poor surface quality, poor dimensional precision, bad plate shape quality and high rejection rate and can not meet the requirements for surface quality of high-grade printing plates. The production method comprises a step of smelting, casting and rolling process, a step of cold rolling process, a step of foil rolling process and a step of cleaning and straightening process. The smelting, casting and rolling process comprises the following steps: feeding aluminum ingots into a smelting furnace for smelting, discharging, refining, removing slag, degassing and filtering. The cold rolling process comprises the step of cold-rolling cold-rolled coils under pressure with a cold-rolling machine. The foil rolling process comprises the step of foil-rolling aluminum tapes with a foil-rolling machine. The cleaning and straightening process comprises the step of straightening aluminum tapes with a tension straightening machine.
Description
Technical field
The present invention relates to a kind of production method of aluminium strip, especially relate to a kind of printing plate-based production method with aluminium strip.
Background technology
Aluminium is in non-ferrous metal, to use maximum, one of metal material that application surface is the widest, and it has a series of strong physics, chemistry and processing characteristics, and it is of many uses; 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.Owing to having all more difficult necessary requirements that reaches such as surface quality, dimensional accuracy, strip shape quality according to the printing plate-based of domestic original fabrication process with aluminium strip, and percent defective is high and Fe, the control of Si content are improper, cannot meet the shortcoming of the requirement of high-grade printing plate-based Surface Quality, therefore CTP and high-grade color printing are printing plate-based mostly from external import, thereby also there is very large blank for improving printing plate-based process aspect.
Summary of the invention
The invention provides a kind of production method of aluminum tape for base of printing plate, it mainly solves the aluminium strip 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, the control of Si content are improper, cannot meet the problem of the requirement of high-grade printing plate-based Surface Quality.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
A kind of production method of aluminum tape for base of printing plate of the present invention, is characterized in that described method comprises the following steps:
(1) melting, casting-rolling technology:
A. drop into the more than 99.70% fine aluminium ingot melting material of purity, do not allow to add waste material;
B. in smelting furnace, carry out melting, interpolation alloy after melting completes, Fe must add intermediate alloy, drops into refining agent and carry out refining after leaving standstill, and adjusts nitrogen pressure when refining, ensures 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, the stove that falls starts injection refining machine after completing the aluminium liquid in standing furnace is carried out to repeatedly refining, need equally to adjust pressure and ensure that the aluminium liquid height blowing afloat is no more than 15cm, after each refining finishes, skim, refining at regular intervals once;
D. adopt high pure nitrogen to carry out degasification to aluminium liquid, adjust graphite rotator rotating speed, ensure the hydrogen content≤0.11ml/100gAL of aluminium liquid; For controlling hydrogen content≤0.11ml/100gAl, adopt SNIF online refinery by de-gassing system, and nitrogen gas purity requires to reach more than 99.995%, nitrogen pressure is between 0.3-0.4MPa.
E. in degassing procedure, add fining agent to reach the effect of crystal grain thinning with certain speed to aluminium liquid.
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, then batch rolling by devices for taking-up through Casting Roller; Strict control cast strip is horizontal, longitudinal thickness deviation, ensures transverse gage deviation≤0.02mm, longitudinal thickness deviation≤0.1mm, and convexity is between 0.02-0.05mm; Transverse plate forms parabola shaped, to both sides thickness attenuate gradually, does not allow to occur " M " type or " W " type from middle.
(2) cold-rolling process:
A. the parameter control during to cold roll grinding.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, 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 depress cold rolling coil cold rolling, when cold rolling, spray ROLLING OIL 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 30～45% of front gross thickness; In the operation of rolling, require 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. in the time that rolling schedule is depressed by above-mentioned passage.
(3) paper tinsel roll process:
A. parameter control when roll dressing.Adopt the irreversible cold foil mill of 1,650 four roller to be rolled, for ensureing camber, glacing flatness and the fineness after roll on aluminium volume surface, in control top working roll of the present invention, height is 0.07mm, the poor 0.001mm that is less than of diameter at body of roll two ends, cylindricity is controlled at 0.005mm, and surface roughness is Ra0.24 ± 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, the front and back tension force of operation of rolling control band, the size of mill speed.Because aluminium volume does not carry out intermediate annealing before cold rolling, cause aluminium volume interior tissue internal stress larger.Thereby the thickness of depressing when rolling accounts for the 15-20% that depresses front gross thickness at every turn, can ensure carrying out smoothly of rolling.
In the paper tinsel operation of rolling, should strictly control the thickness deviation of aluminium volume, ensure the good of plate shape.
(4) degrease, straightening process
A. select the aligning unit based on pure extension straightening technology to align aluminium strip.Before aligning, production board face is cleaned, when cleaning, product passes through respectively pre-oil removing cleaning case, alkali cleaning case and rinse tank, reaches by the parameters (as the temperature of rinse water temperature, baking oven, rinse water acid-base value, brush roll rotating speed, unit operation speed etc.) of strict control aligning unit the object that improves product surface quality.Feed back to corresponding plat control system by the detected board form data of online detecting instrument of flatness, according to the elasticity difference of supplied materials actual plate shape, passed through automatically to adjust again the expansion proportionality coefficient of each section of 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;
B. after aligning, go out finished product.
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 DEG C, 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 DEG C, can ensure carrying out smoothly of melting, can prevent again melt burning, leaves standstill 20-30 minute after melting, and melt temperature homogenising makes composition more even simultaneously.
As preferably, in described step (1) c, be 15-20 minute to the time of the each refining of aluminium liquid in standing furnace, leave standstill and skim after 5-10 minute, every 1.5-2 hour refining is 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 ensured the uniformity of composition but also further ensured 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, ensure the inside quality of aluminium strip woollen.
As preferably, in described step (1) e, adopt one-level Al-Ti-B silk, the feed speed of titanium silk is 250mm/min, ensures 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, ensures the effect of slagging-off.
As preferably, in described step (1) g 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, roll cylindricity is controlled at 0.005mm, roller footpath is not less than 670mm; Front case temperature is controlled at 695-705 DEG C, and front case liquid level 14-18mm, rolls 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 ROLLING OIL light transmittance be reached for one-level; Mill speed is controlled at 450～650m/min, and controlled rolling speed can effectively prevent 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 there is load mould and bright wisp.And additive is too many, cause viscosity too large, can cause film distribution inequality, ROLLING OIL purges unclean, affects plate face quality.
As preferably, in described step (3) b, drafts is 0.4mm → 0.33mm → 0.27mm; Average mill speed is controlled at 400-500m/min.This mill speed can do not affect roll after in the scope of surface quality of aluminium volume, ensure 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 3.5-4.5Kg/mm
2scope, forward pull will be controlled at 4.5-5.5 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 reflection depth of parallelism of milling train and the index of concentricity, be also the inhomogeneity index of reflection aluminum foil thickness, and the inequality of thickness will have a strong impact on the printing plate-based serviceability with aluminium strip, must be controlled in 6 tons so roll-force is poor.
As preferably, in described step (3), adopt thickness reponse system to control the thickness deviation of aluminium volume, adopt template instrument to ensure 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, slightly thick both sides, centre are thin, both sides symmetrically, apleuria wave, side wave and middle deals shape.
As preferably, described step (4) a adopts the PL800 of Sai Lima company containing the pure extension aligning unit of degrease, aluminium to be involved in 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 made up 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 from 0-100, controls the roll coil of strip reach target call through the plate shape of aligning with this.
Pure extension technology is the current whole world state-of-the-art plate shape tension straingtening technology, and it is, by the flexible of expansion flattening roller that can free wxpansion, aluminum strip attached to it is applied to radial tension, makes product produce plastic deformation thereby produce stretching action.Meanwhile, the flexible of expansion roller can carry out in segmentation, on the width of sheet material, sheet material is divided into several intervals, then according to the actual conditions of incoming profile, the coefficient of expansion of each section of expansion roller regulated respectively.The tighter region of actual plate shape is increased to expansion roller to the coefficient of expansion that should section, the more loose region of actual plate shape is reduced 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.Compared with or tension force strong with domestic traditional stretch bending is rectified, pure extension technology is except carrying out also having another one feature the aligning of subregion to production board shape.Traditional stretch bending is rectified or tension force is strong all will align product by one group of very little replaceable straightening roller system of diameter, and this kind of replaceable straightening roller system because of in the time that product is aligned and the contact area of product very little, so can produce very large pressure to product surface in the time of aligning.Under the effect of this high pressure, the aluminium ash that product surface is difficult to clean up be just easy to be bonded on smoothing roll and along with aligning process constantly carry out more long-pending larger, in the time that aluminium ash becomes graininess greatly to a certain extent, in aligning region, under the high pressure effect of smoothing roll, on plate face, will form load mould.But adopt 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, under this less pressure-acting, 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.First the pre-oil removing cleaning case of process, cleans strip material plate face by the rinse water that pH value is lower, removes in advance a part of surface band oil.Enter afterwards 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, carry out rinsing with clear water, the ROLLING OIL and the alkali lye that remain on plate face are cleaned up.When cleaning, water temperature is not less than 60 DEG C, the baking temperature of baking oven is not less than 80 DEG C, the pH value of cleaning fluid is 10-12, the rotating speed of brush roll is 1500-2000r/min, machine row speed is 150-200r/min, can ensure glacing flatness and surface quality that band is higher, reduce the blemish of band, can make again production efficiency effectively improve.The strip surface cleaning, smooth that this invention is produced, the horizontal coarse scope in surface is between 0.18um-0.28um, and plate face glacing flatness is in 5I.
Therefore, the printing plate-based surface quality with aluminium strip and strip shape quality that the present invention produces can obtain good control, and can effectively ensure the dimensional accuracy of product.Can meet high-grade printing to printing plate-based requirement.
Detailed description of the invention
Below by embodiment, technical scheme of the present invention is described in further detail.
Embodiment 1: a kind of printing plate-based production method with aluminium strip of this example, the steps include:
(1) melting, casting-rolling technology:
A. dropping into purity is more than 99.70% fine aluminium ingot melting material, does not allow to add waste material;
B. in smelting furnace, carry out melting, the time of melting is 4 hours, the temperature of melting is 760 DEG C, the corresponding alloy of interpolation after melting completes, leave standstill and after 20 minutes, drop into refining agent and carry out refining, when refining, adjust nitrogen pressure, ensure 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 the time of falling stove is no more than 740 DEG C, standing furnace temperature is 730 DEG C, the stove that falls starts injection refining machine after completing the aluminium liquid in standing furnace is carried out to repeatedly refining, and adjust pressure, ensure 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, leaves standstill and skims after 5 minutes;
D. adopt 99.995% high pure nitrogen to carry out degasification to aluminium liquid, adjusting graphite rotator rotating speed is 300r/min, ensures the hydrogen content≤0.11ml/100gAl of aluminium liquid;
E. in the aluminium liquid of degasification tank, pass into Al-Ti-B silk with the speed of 250m/min, ensure that Casting Rolled Sheet two sides grain size is one-level.
F. adopt 50 object double-layer filter plates to filter aluminium liquid.
G. aluminium liquid is sent in front case, and adjustment cooling water pressure is 0.3MPa, carries out casting through Casting Roller, batch rolling by devices for taking-up again, during Casting Roller grinding requires, height is controlled at 0.1mm, and middle high symmetry is at 0.005mm, roughness is 0.8um, and roll cylindricity reaches 0.005mm; Front case temperature is controlled at 695 DEG C, and front case liquid level 15mm, rolls 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 depress cold rolling coil cold rolling, spray ROLLING OIL and carry out cooling and lubricating when cold rolling, controlling average mill speed is 400m/min.Rolling pass is that 7.0mm → 4.0mm → 2.5mm → 1.55mm is put rolling → 1.0mm → 0.65mm → 0.40mm after 24 hours, places after 24 hours trimming wide to 1050mm, and taking the thick cast-rolling stock of 7.0mm as example, drafts is as shown in the table:
| Passage | 1 | 2 | 3 | 4 | 5 | 6 |
| Supplied materials thickness (mm) | 7.00 | 4.00 | 2.50 | 1.55 | 1.00 | 0.65 |
| Finished product thickness (mm) | 4.00 | 2.50 | 1.55 | 1.00 | 0.65 | 0.4 |
| Absolute draft amount (%) | 3.00 | 1.50 | 0.95 | 0.55 | 0.35 | 0.25 |
| Relative reduction (%) | 42.86 | 37.50 | 38.00 | 35.48 | 35.00 | 38.46 |
| General working rate (%) before final pass | 0.00 | 42.86 | 64.29 | 77.86 | 85.71 | 90.71 |
| General working rate after final pass (%) | 42.86 | 64.29 | 77.86 | 85.71 | 90.71 | 94.29 |
(3) paper tinsel roll process:
A. parameter control when roll dressing.Adopt 1650 foil mills, for ensureing that camber, glacing flatness and fineness after roll on aluminium volume surface reach requirement, in control roll of the present invention, height is 0.07mm, the poor 0.001mm that is less than of diameter at body of roll two ends, 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 rolling oil viscosity is 1.85mm
2/ s, the number of times of depressing is 2 times, and average speed is 450m/min, and taking the thick finished product of 0.27mm as example, drafts is as shown in the table:
(4) degrease, straightening process
A. adopt the PL800 of Sai Lima company, containing the pure extension aligning unit of degrease, aluminium is involved in to row cleaning, 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 made up of the chamber that can control respectively its free-extension expansion.In the time that supplied materials is middle deals shape, suitably dwindle the coefficient of expansion of interlude and increase the coefficient of expansion of both sides portion, reach the object of stretching plate shape with this.While moving this aligning unit, band will first pass through three cleaning cases and a baking oven.First the pre-oil removing cleaning case of process, cleans strip material plate face by the rinse water that pH value is lower, removes in advance a part of band oil.Enter afterwards 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, carry out rinsing with clear water, the alkali lye remaining on plate face is cleaned up.When cleaning, water temperature is 60 DEG C, the baking temperature of baking oven is 80 DEG C, the pH value of cleaning fluid is 10, the rotating speed of brush roll is 2000r/min, machine row speed is 160m/min, under this technological parameter, can ensure glacing flatness and surface quality that band is higher, the blemish that reduces band, can make again production efficiency effectively improve.The strip surface cleaning, smooth that this invention is produced, the horizontal coarse scope in surface is at 0.18um-0.28um, and plate face glacing flatness is in 5I.
B. after aligning, batch, check, pack and go out finished product.
Embodiment 2: a kind of production method of printing base aluminium strip of this example, the steps include:
(1) melting, casting-rolling technology:
A. drop into the more than 99.70% fine aluminium ingot melting material of purity, do not allow to add waste material;
B. in smelting furnace, carry out melting, the time of melting is 4.5 hours, the temperature of melting is 750 DEG C, the corresponding alloy of interpolation after melting completes, leave standstill and after 20 minutes, drop into refining agent and carry out refining, when refining, adjust nitrogen pressure, ensure 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 standing furnace and fallen stove, the time of falling stove, temperature temperature is 740 DEG C, standing furnace temperature is 730 DEG C, the stove that falls starts injection refining machine after completing to carry out repeatedly refining and adjusts pressure the aluminium liquid in standing furnace, ensures that the height that nitrogen blows afloat aluminium liquid is no more than 15cm, and each refining time is not less than 15 minutes, leave standstill and skim after 5 minutes, every refining in 2 hours once;
D. adopt 99.995% high pure nitrogen to carry out degasification to aluminium liquid, adjusting graphite rotator rotating speed is 350r/min, ensures the hydrogen content≤0.11ml/100gAL of aluminium liquid;
E. the speed that passes into is the Al-Ti-B silk of 250m/min, ensures that Casting Rolled Sheet two sides grain size is one-level.
F. adopt 50 object double-layer filter plates to filter aluminium liquid;
G. aluminium liquid is sent in front case, adds hydraulic pressure, carries out casting by Casting Roller, then coils into cold rolling coil by devices for taking-up, and during Casting Roller grinding requires, height is controlled at 0.15mm, and middle high symmetry is at 0.01mm, and roughness is 0.85um, and roll cylindricity reaches 0.01mm; Front case temperature is controlled at 700 DEG C, and front case liquid level 15mm, rolls 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 depress cold rolling coil cold rolling, add ROLLING OIL when cold rolling, controlled rolling speed is 330m/min.Rolling pass is that 7.0mm → 4.0mm → 2.5mm → 1.55mm is put rolling → 1.0mm → 0.65mm → 0.40mm after 24 hours, places trimming after 24 hours and rolls to paper tinsel to 1050mm is wide, and taking the thick cast-rolling stock of 7 ± 0.2mm as example, drafts is as shown in the table:
(3) paper tinsel roll process:
A. the control of roller parameter.Adopt 1650 foil mills, for ensureing camber, glacing flatness and the fineness after roll on aluminium volume surface, in control roll of the present invention, height is 0.07mm, the poor 0.001mm that is less than of 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 2 times, and average speed is 500m/min, and taking the thick finished product of 0.27mm as example, drafts is as shown in the table:
(4) degrease, straightening process:
A. adopt the PL800 of Sai Lima company, containing the pure extension aligning unit of degrease, aluminium is involved in to row cleaning, 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 made up of the chamber that can control respectively its free-extension expansion.In the time that supplied materials is both sides deals shape, suitably dwindle the coefficient of expansion of both sides portion and increase the coefficient of expansion of interlude, reach the object of stretching plate shape with this.While moving this aligning unit, band will first pass through three cleaning cases and a baking oven.First the pre-oil removing cleaning case of process, cleans strip material plate face by the rinse water that pH value is lower, removes in advance a part of band oil.Enter afterwards 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, carry out rinsing with clear water, the alkali lye remaining on plate face is cleaned up.When cleaning, water temperature is 70 DEG C, the temperature baking temperature of baking oven is 90 DEG C, the pH value of cleaning fluid is 11, the rotating speed of brush roll is 1800r/min, machine row speed is 180m/min, under this technological parameter, can ensure glacing flatness and surface quality that band is higher, the blemish that reduces band, can make again production efficiency effectively improve.The strip surface cleaning, smooth that this invention is produced, the horizontal coarse scope in surface is at 0.18um-0.28um, and plate face glacing flatness is in 5I.
B. after straightener aligning, go out finished product.
Embodiment 3: a kind of production method of printing base aluminium strip of this example, the steps include:
(1) melting, casting-rolling technology:
A. drop into the more than 99.70% fine aluminium ingot melting material of purity, do not allow to add waste material;
B. in smelting furnace, carry out melting, the time of melting is 6 hours, the temperature of melting is 740 DEG C, the corresponding alloy of interpolation after melting completes, leave standstill and after 20 minutes, drop into refining agent and carry out refining, when refining, adjust nitrogen pressure, ensure 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 standing furnace and fallen stove, the time of falling stove, temperature can not exceed the upper limit of smelting temperature, standing furnace temperature is 740 DEG C, the stove that falls starts injection refining machine after completing to carry out repeatedly refining and adjusts pressure the aluminium liquid in standing furnace, ensures that the height that nitrogen blows afloat aluminium liquid is no more than 15cm, and each refining time is not less than 15 minutes, leave standstill and skim after 5 minutes, every refining in 2 hours once;
D. adopt 99.995% high pure nitrogen to carry out degasification to aluminium liquid, adjusting graphite rotator rotating speed is 400r/min, ensures the hydrogen content≤0.11ml/100gAL of aluminium liquid;
E. the speed that passes into is the Al-Ti-B silk of 250m/min, ensures that Casting Rolled Sheet two sides grain size is one-level.
F. adopt 50 object double-layer filter plates to filter aluminium liquid;
G. aluminium liquid is sent in front case, adds hydraulic pressure, carries out casting by Casting Roller, then coils into cold rolling coil by devices for taking-up, and during Casting Roller grinding requires, height is controlled at 0.15mm, and middle high symmetry is at 0.01mm, and roughness is 0.85um, and roll cylindricity reaches 0.01mm; Front case temperature is controlled at 700 DEG C, and front case liquid level 15mm, rolls 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 depress cold rolling coil cold rolling, add ROLLING OIL when cold rolling, controlled rolling speed is 330m/min.Rolling pass is that 7.0 → 4.0 → 2.5 → 1.55mm is put rolling → 1.0 → 0.65 → 0.40mm after 24 hours, places after 24 hours trimming and rolls to paper tinsel after wide to 1050mm, and taking the thick cast-rolling stock of 7 ± 0.2mm as example, drafts is as shown in the table:
| Passage | 1 | 2 | 3 | 4 | 5 | 6 |
| Supplied materials thickness (mm) | 7.00 | 4.00 | 2.50 | 1.55 | 1.00 | 0.65 |
| Finished product thickness (mm) | 4.00 | 2.50 | 1.55 | 1.00 | 0.65 | 0.4 |
| Absolute draft amount (%) | 3.00 | 1.50 | 0.95 | 0.55 | 0.35 | 0.25 |
| Relative reduction (%) | 42.86 | 37.50 | 38.00 | 35.48 | 35.00 | 38.46 |
| General working rate (%) before final pass | 0.00 | 42.86 | 64.29 | 77.86 | 85.71 | 90.71 |
| General working rate after final pass (%) | 42.86 | 64.29 | 77.86 | 85.71 | 90.71 | 94.29 |
(3) paper tinsel roll process:
A. the control of roller parameter.Adopt 1650 foil mills, for ensureing camber, glacing flatness and the fineness after roll on aluminium volume surface, in control roll of the present invention, height is 0.07mm, the poor 0.001mm that is less than of 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 2 times, and speed is 500m/min, and taking the thick finished product of 0.27mm as example, drafts is as shown in the table:
| Passage | 1 | 2 |
| Supplied materials thickness (mm) | 0.400 | 0.320 |
| Finished product thickness (mm) | 0.320 | 0.270 |
| Absolute draft amount (%) | 0.080 | 0.050 |
| Relative reduction (%) | 20.00 | 15.63 |
| General working rate (%) before final pass | 0.00 | 20.00 |
| General working rate after final pass (%) | 20.00 | 32.50 |
(4) degrease, straightening process
A. adopt the PL800 of Sai Lima company, containing the pure extension aligning unit of degrease, aluminium is involved in to row cleaning, 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 made up of the chamber that can control respectively its free-extension expansion.In the time that 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 portion and interlude, reach the object of stretching plate shape with this.While moving this aligning unit, band will first pass through three cleaning cases and a baking oven.First the pre-oil removing cleaning case of process, cleans strip material plate face by the rinse water that pH value is lower, removes in advance a part of band oil.Enter afterwards 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, carry out rinsing with clear water, the alkali lye remaining on plate face is cleaned up.When cleaning, water temperature is 80 DEG C, the temperature baking temperature of baking oven is 90 DEG C, the pH value of cleaning fluid is 12, the rotating speed of brush roll is 1500r/min, machine row speed is 200m/min, under this technological parameter, can ensure glacing flatness and surface quality that band is higher, the blemish that reduces band, can make again production efficiency effectively improve.The strip surface cleaning, smooth that this invention is produced, the horizontal coarse scope in surface is at 0.18um-0.28um, and plate face glacing flatness is in 5I;
B. after aligning unit aligning, go out finished product.
Claims (1)
1. a production method of aluminum tape for base of printing plate, is characterized in that described method comprises the following steps:
(1) melting, casting-rolling technology:
A. drop into the more than 99.70% fine aluminium ingot melting material of purity, do not allow to add waste material;
B. in smelting furnace, carry out melting, the time of melting is 4.5 hours, the temperature of melting is 750 DEG C, the corresponding alloy of interpolation after melting completes, leave standstill and after 20 minutes, drop into refining agent and carry out refining, when refining, adjust nitrogen pressure, ensure 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 standing furnace and fallen stove, the time of falling stove, temperature is 740 DEG C, standing furnace temperature is 730 DEG C, the stove that falls starts injection refining machine after completing to carry out repeatedly refining and adjusts pressure the aluminium liquid in standing furnace, ensures that the height that nitrogen blows afloat aluminium liquid is no more than 15cm, and each refining time is not less than 15 minutes, leave standstill and skim after 5 minutes, every refining in 2 hours once;
D. adopt 99.995% high pure nitrogen to carry out degasification to aluminium liquid, adjusting graphite rotator rotating speed is 350r/min, ensures the hydrogen content≤0.11ml/100gAL of aluminium liquid;
E. the speed that passes into is the Al-Ti-B silk of 250m/min, ensures that Casting Rolled Sheet two sides grain size is one-level;
F. adopt 50 object double-layer filter plates to filter aluminium liquid;
G. aluminium liquid is sent in front case, adds hydraulic pressure, carries out casting by Casting Roller, then coils into cold rolling coil by devices for taking-up, and during Casting Roller grinding requires, height is controlled at 0.15mm, and middle high symmetry is at 0.01mm, and roughness is 0.85um, and roll cylindricity reaches 0.01mm; Front case temperature is controlled at 700 DEG C, and front case liquid level 15mm, rolls 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 depress cold rolling coil cold rolling, add ROLLING OIL when cold rolling, controlled rolling speed is 330m/min; Rolling pass is that 7.0mm → 4.0mm → 2.5mm → 1.55mm is put rolling → 1.0mm → 0.65mm → 0.40mm after 24 hours, places trimming after 24 hours and rolls to paper tinsel to 1050mm is wide;
(3) paper tinsel roll process:
A. the control of roller parameter; Adopt 1650 foil mills, for ensureing camber, glacing flatness and the fineness after roll on aluminium volume surface, in control roll of the present invention, height is 0.07mm, the poor 0.001mm that is less than of 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 2 times, and average speed is 500m/min;
(4) degrease, straightening process:
A. adopt the PL800 of Sai Lima company, containing the pure extension aligning unit of degrease, aluminium is involved in to row cleaning, aligning; This unit has been installed expansion flattening roller, and this flattening roller is divided into 9 sections, and every section is made up of the chamber that can control respectively its free-extension expansion; In the time that supplied materials is both sides deals shape, suitably dwindle the coefficient of expansion of both sides portion and increase the coefficient of expansion of interlude, reach the object of stretching plate shape with this; While moving this aligning unit, band will first pass through three cleaning cases and a baking oven; First the pre-oil removing cleaning case of process, cleans strip material plate face by the rinse water that pH value is lower, removes in advance a part of band oil; Enter afterwards 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, carry out rinsing with clear water, the alkali lye remaining on plate face is cleaned up; When cleaning, water temperature is 70 DEG C, and the temperature baking temperature of baking oven is 90 DEG C, and the pH value of cleaning fluid is 11, the rotating speed of brush roll is 1800r/min, machine row speed is 180m/min, and the horizontal coarse scope in surface of band is at 0.18um-0.28um, and plate face glacing flatness is in 5I;
B. after straightener aligning, go out finished product.
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| CN102989770B (en) * | 2012-11-17 | 2015-03-04 | 镇江鼎胜铝业股份有限公司 | Method for producing curtain aluminium sheet belt by 3004 alloy cast rolling blank |
| CN103056918A (en) * | 2012-12-21 | 2013-04-24 | 深圳市柳鑫实业有限公司 | Aluminum sheet for improving accuracy of hole site of drill hole and manufacturing method |
| CN104624700A (en) * | 2014-12-31 | 2015-05-20 | 中铝西南铝冷连轧板带有限公司 | Production method of printing PS plate aluminum material through cold rolling and direct rolling |
| CN107377903A (en) * | 2017-06-26 | 2017-11-24 | 永杰新材料股份有限公司 | A kind of casting and rolling molding method and system of in-situ endogenic particle enhanced aluminum-based composite material |
| CN110000227A (en) * | 2019-04-22 | 2019-07-12 | 邹平宏发铝业科技有限公司 | The method for reducing Cold Rolling Aluminium Strip material tank material surface aluminium powder and Residual oil |
| 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 |
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| CN101196689A (en) * | 2007-04-20 | 2008-06-11 | 王致国 | Hot rolling high fine aluminum plate substrate and its production method |
| CN101851707A (en) * | 2010-05-14 | 2010-10-06 | 重庆捷和铝业有限公司 | Manufacturing method of 1060P alloy printing plate-based blank |
| 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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| JP2778663B2 (en) * | 1996-04-08 | 1998-07-23 | 株式会社神戸製鋼所 | Aluminum alloy plate for printing plate and method for producing the same |
| JP5265955B2 (en) * | 2008-04-18 | 2013-08-14 | 富士フイルム株式会社 | Plane printing plate aluminum alloy plate, planographic printing plate support, planographic printing plate precursor, and method for producing planographic printing plate aluminum alloy plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101196689A (en) * | 2007-04-20 | 2008-06-11 | 王致国 | Hot rolling high fine aluminum plate substrate and its production method |
| CN101851707A (en) * | 2010-05-14 | 2010-10-06 | 重庆捷和铝业有限公司 | Manufacturing method of 1060P alloy printing plate-based blank |
| 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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