CN107487095A - A kind of color printing technique - Google Patents

Abstract

The invention discloses a kind of color printing technique, including getting film, locing up, fill scraper, installation stamping ink pad, allotment ink, upper volume, the step such as start, the present invention has taken into full account many factors such as ink viscosity, configuration process and drying temperature, has fully ensured that plastic sheeting color printing effect.

Description

A kind of color printing technique

Technical field

The present invention relates to a kind of color printing technique, more particularly to a kind of packaging bag color printing technique.

Background technology

Intaglio printing is the main mode of printing of packages printing, is characterized in really reproducing original copy effect, the color of printing It is color with the binding hierarchy of pattern it is abundant it is clear, mass colour saturation is abundant, bright in colour bright etc..And relative to soft version trans-printing, Offset lithographic etc., intaglio printing is in addition to above-mentioned advantage, also with equipment investment cost is relatively low, technical matters is ripe, comprehensive Conjunction working ability is strong, ink low cost and other advantages.Therefore intaglio printing is a kind of conventional color printing technology.

The bad situation of color printing effect often occurs on a plastic film for the color printing effect of existing intaglio printing, it would be highly desirable to solves Certainly.

The content of the invention

The invention is intended to provide a kind of color printing technique, to solve, plastic sheeting color printing effect is bad in the prior art asks Topic.

Patent formula：A kind of color printing technique in this programme, comprises the following steps：

Step 1, film is got：Film is got by title material and specification, checks the flatness of film, whether is observation coating materials There are sudden and violent muscle, scollop, scallop, stiff block, hole, booklet etc. not to conform to the situation of quality requirement, if there is the above situation, it is preferable to change neck quality Film；

Step 2, lock up：Roller is disposed across and lockd up on car, one is first fixed in one end of axle silently, then passes through axle Roller, alignment pin groove location, make silently with roller tight connecting；Axle the other end load an activity silently with a fixation Silently, by fixed silently locking positioning, then rotation top position screw, activity is silently held out against with roller, it is impossible to there is a bit loosening, Otherwise edition phenomenon is easily walked, it is accurate to influence registering；

Step 3, scraper is filled：Current Combined scraper, with the 1.2 meters of wings operated on, smooth is mounted in combination cutter holder；

Step 4, stamping ink pad is installed：Disc is lain under roller between two parties, notices that disc can not encounter roller；

Step 5, ink is allocated：When allocating spot color, first weigh mass-tone, after weigh color matching, and color matching is slowly added to lead It is stirring while adding to be uniformly slowly added into solvent along bucket wall in color, it is stirring while adding, after stirring 2 minutes, by solvent along bucket Wall is slowly added in primary colors ink, stirring while adding；

Step 7, upper volume：Film roll outer packing is removed, is lying on fork truck, upper volume A axles are removed, axle is passed across into film roll Refill, aerating hold out against film roll refill, push ahead fork truck, make the gear position of axle both ends alignment rotary arm, restart rotation Turn the arm of force, the gear allowed on axle is matched, and axle both sides end cap is locked；Removing film roll surface has the film of mass defect, draws It is disconnected neat, when needing change of lap, adhesive tape, mucilage glue surface it should be more than 35mm on the cross section note of film；

Step 8, film is worn：Film roll chieftain is pulled out, sequentially passes through each deflector roll in the portion of unreeling and dancer；Through each list of printing First deflector roll and roller platen；Through carry-over pinch rolls to Scroll；

Step 9, start debugging：Open that ink pumping source is gentle compresses switch, start ink pumps, ink is filled stamping ink pad；

Step 10, by stamping ink pad rise until ink can submerge at roller 1/5, lay scraper, wherein, scraper connects with roller Angle between the tangent line of contact is into 15-45 °；

Step 11, start air blower, restart drier and heated, and set heating-up temperature to 80-86 DEG C；

Step 12, start Scroll, restart main frame clutch, speed is adjusted to 30-40m/min, lays roller platen, Start to print；

Step 13, chromatography：Left hand point lives rubber roll point driving switch up and down, and the right hand holds clutch handle, using the first color as base Standard, carries out longitudinal chromatography, after the color of alignment second, sequentially chromatography in the same way, and then on the basis of the first color, adjusting handle Carry out horizontal register successively in the same way, after manual chromatography alignment, that is, open automatic electronic computer to version；Automatically to version, be by The electronic scanner of automatic registering instrument is completed, i.e., is come automatically by the pulse signal on every group of photoelectric scanning head waveform monitor It is a set of the distance between a set of with itself before regulation, make the photoelectric color subject distance 20mm between two sets constant；

Step 14, wind：Winding A axles are removed, refill is inserted in aerating in axle and holds out against refill, then Scroll is put into and revolved Turn in the arm of force, and Scroll both ends are locked, adhesive tape is wrapped with paper core, film is bonded on adhesive tape, start Scroll and start Winding.Winding tension is neat with product winding, does not slide and is defined, and tension decay control is in 6kg, and constant tensile control is in 8kg, when one After wound membrane has been rolled up, on cleavable change of lap to B axle, the installation method of B axle refill is identical with A axles；

Step 15, last volume：Open Scroll both ends gear cap, film roll caught with trolley, start the winding arm of force, allow axle with The arm of force disengages, and then bleeds off the gas inside axle, takes out Scroll；So far color printing technique is completed.

In plastic printing, the viscosity of ink has large effect to printing quality, by adjusting the big of ink viscosity It is small, it can effectively improve printing effect.1. form and aspect, turning ink viscosity lighter down, otherwise darken.But can not be simply Viscosity is turned down to change color, otherwise can produce other problems, such as water wave, color does not have gloss.In toning, GPRS is well not The change deviation of same color viscosity size, can just better profit from viscosity.Such as：When primary colors Huang viscosity is big, there is deviation red Simultaneously, and viscosity hour can show and have green；Green viscosity blue phase inclined greatly, viscosity is small to show yellow phase.2. water wave, this problem one As also have close ties with print speed printing speed, print speed printing speed it is lower, it is necessary to ink viscosity it is bigger, otherwise it is just smaller, if speed Coordinate with viscosity and bad be just easy to water wave occur.Usual print speed printing speed is substantially stationary, so being all by increasing ink Viscosity solves water wave.Separately have that a kind of phenomenon and water wave are much like, if be easy to without examining, analyzing as processing water wave Equally, go to solve with increased viscosity, as a result do not have effect (or reverse effect) but, this, which puts many people, can all ignore.I Many printing personnel were contacted in person, they often make this mistake.Water wave and the difference of this phenomenon (temporarily crying " flower point ") are：Water wave What is showed is the point-like of very short very short lines, and " flower point " what is showed is round point-like.Solve Hua Dianshi and turn ink viscosity down, If may be seriously very much that version or ink quality are problematic, the effect of improvement be only served by turning viscosity down.3. knife line, Less ink viscosity can prevent the appearance of knife line to greatest extent, and when particularly printing level version, just print does not have these knife lines Have, or it is very small, how long just increasingly severe do not print.Also a kind of situation is that knife line all comes across the position of reticulate pattern, and And all it is in the place of starting point.4. wiping effect, viscosity is big, and wiping effect is bad (refer to scrape unclean), especially for tusche, one As it is unclean to prevent from scraping all with less viscosity.5. double exposure is bad, including two kinds of situations：It is a kind of to refer to rear ink dissolving of the same colour Above color out of the press so that discoloration produces hangover, ghost image, ink viscosity of the same colour after should now increasing；Another feelings Condition is that rear ink of the same colour is not gone forward ink of the same colour, now to turn the viscosity of latter color ink down.It is less viscous when printing shallow net Degree is advantageous to improve the transfer of ink, avoids the occurrence of bad " small particles " phenomenon.It is viewed from above, viscosity and many printings Problem has close contact, and the regulation can for having grasped viscosity solves many problems.

The present invention has taken into full account many factors such as ink viscosity, configuration process and drying temperature, fully ensures that Plastic sheeting color printing effect.

Further, in step 11, heating-up temperature is set as 85 DEG C.

Further, in step 5, if using the previous day used ink, 3 are pressed after being filtered with 200 mesh filter screens:7 quality Ratio is added in new ink and is used in mixed way；Avoid producing substantial amounts of knife line and flower width.

Further, in step 10, adjustment scraper pressure is between 15-25kg；To shave roller ink.

Embodiment

Below by embodiment, the present invention is further detailed explanation：

Preparation before 1.1 starts

1.1.1 whether there are dust, rubbish around inspection printing machine and with printing unrelated debris and being removed, check Whether air exhausting device of divulging information is intact.

1.1.2 film is got

Title material and specification get film as defined in technical papers.The flatness of film is checked, whether is observation coating materials There are sudden and violent muscle, scollop, scallop, stiff block, hole, booklet etc. not to conform to the situation of quality requirement, if there is the above situation, it is preferable to change neck quality Film.

Whether reach technical papers setting with the surface tension in surface tension liquid test sided corona treatment face.

1.2 lock up

1.2.1 by group leader according to production advice note regulation kind, neck goes out roller from roller storehouse, and checks roller whether there is Damage, sand holes, Tuo Chrome dew copper is whether there is, if there is the above situation, should stop locing up, and notify that workshop and raw skill portion are handled.

1.2.2 roller is disposed across and lockd up on car, one is first fixed in one end of axle silently, axle is then passed through into roller, Alignment pin groove location, make silently with roller tight connecting.Load an activity in the other end of axle silently to fix with one silently, Silently locking positioning will be fixed, then rotation top position screw, activity is silently held out against with roller, it is impossible to have a bit loosening, otherwise Edition phenomenon is easily walked, it is accurate to influence registering.

1.2.3 according to color sequence, roller is put into frame center.Whether with hand preliminary operation roller, it is flexible to observe its operating, Steadily.

1.3 dress scrapers

Current Combined scraper, with the 1.2 meters of wings operated on, smooth is mounted in combination cutter holder.

1.4 installation stamping ink pads

1.4.1 disc is lain under roller between two parties, notices that disc can not encounter roller.

1.5 allotment ink

When 1.5.1 allocating spot color, according to proportioning as defined in technical papers.Mass-tone is first weighed, it is rear to claim color matching, and it is slow to match colors Slowly it is added in mass-tone, it is stirring while adding uniform.Solvent is slowly added into along bucket wall, it is stirring while adding, after stirring 2 minutes, use No. 3 cups test its viscosity, reach viscosity number as defined in technical papers.

When 1.5.2 allocating primary colors ink, directly solvent is slowly added in primary colors ink along bucket wall, it is stirring while adding, with 3 Number cup tests its viscosity, reaches viscosity number as defined in technical papers.

1.5.3 the previous day used ink, it is added in new ink and mixes in 30% ratio after being filtered with 200 mesh filter screens Use.Can not directly it use on the machine, in order to avoid produce substantial amounts of knife line and flower width.

Rolled up on 1.6

Film roll outer packing is removed, is lying on fork truck, upper volume A axles are removed, axle is passed across into film roll refill, aerating will Film roll refill is held out against, and pushes ahead fork truck, is made the gear position of axle both ends alignment rotary arm, is restarted rotary arm, allow axle On gear match, and by axle both sides end cap lock；Removing film roll surface has the film of mass defect, draws disconnected neat.It need to change During volume, adhesive tape, mucilage glue surface 35mm should should be greater than on the cross section note of film.

1.7 wear film

Film roll chieftain is pulled out, sequentially passes through each deflector roll in the portion of unreeling and dancer；Through printing each unit deflector roll and impressing Roller；Through carry-over pinch rolls to Scroll.

1.8 start debugging

1.8.1 open that ink pumping source is gentle compresses switch, start pump, ink is filled stamping ink pad, and pay attention to observation ink Whether pump operating is normal, and whether ink pipe is unimpeded, if ink leak, the black phenomenon of plug be present.

1.8.2 start main motor button, speed is transferred to empty wagon position, idle-running, whether checks each set roller operating Normally.

1.8.3 stamping ink pad is risen until ink can be submerged at roller 1/5, lays scraper, adjust scraper, allow scraper and version Angle between roller contact point tangent line is between 15-45 DEG C.Scraper pressure is adjusted between 15-25kg, so that roller oil can be shaved Ink is advisable.

1.8.4 start air blower, restart drier and heated, and by technical papers setting heating-up temperature.

1.8.5 start Scroll, restart main frame clutch, speed is adjusted to 30-40m/min, lays roller platen, is opened Begin to print, and by technical papers setting squeegee pressure, printing tension force and winding tension.

1.8.6 feed tension is corrected.

1.9 chromatography

Left hand point lives rubber roll point driving switch up and down, and the right hand holds clutch handle, on the basis of the first color, carries out longitudinal sleeve Color, after the color of alignment second, sequentially chromatography in the same way, then on the basis of the first color, adjusting handle is in the same way Horizontal register is carried out successively.After manual chromatography alignment, that is, automatic electronic computer is opened to version.

The regulation of 1.10 automatic registering instrument

1.10.1 principle：Automatically to version, completed by electronic scanner, i.e., oscillography is monitored by every group of photoelectric scanning head Pulse signal on device makes the photoelectric color subject distance between two sets come a set of the distance between a set of with itself before automatically adjusting 20mm is constant.

1.10.2 operating process：Turn on the power, colour code probe alignment being printed on film, it is produced photoelectricity Signal, according to roller circumferential size adjusting knob, it is allowed to match with the size of roller girth, then change-over switch is gone to first Set, first set and second set of pulse signal are found, i.e., using first set frequency width knob, makes signal above the screen of scanning oscillograph Produce, signal shares two, is allowed to horizontal level and is in upright position and axle left on power axle, two are seen by conversion wave point knob Whether individual signal occurs and overlapping, if yes, that is, illustrates that first set has been completed；Knob is transformed into second set again, looked for Second set with the 3rd set of signal, but because the chromatography of reality is the 3rd set, so there is three signals generations, and what is worked is Latter two signal, therefore to exclude first signal, leaves latter two signal, the method for searching with preceding a set of identical, behind 3rd, the 4th set searching method with it is as before, it is also necessary to respectively leave two signals；General chromatography whether alignment, can basis Errors table is found out advanced or fallen behind, if it exceeds certain limit, is just failed, at this moment must be adjusted using hand switch, until Adjust automatically to covering scope, switch is then pushed automated location, you can normal work.If cross hairs and the alignment of the space of a whole page Pattern and character have deviation, as the space of a whole page is advanced or falls behind, it is necessary to regulation translation knob, make pattern and word alignment, pattern is advanced Be allowed to backward, otherwise be allowed to advanced, if deviation occurs for left and right ends, it is necessary to adjusting deviation roller is corrected, until pattern with Untill word alignment.Even if registering is completed.

1.11 examine

Stroboscopic lamp and still frame are opened, whether the printing that detects by an unaided eye chromatography is accurate, and whether form and aspect meet the requirements, if The mass defects such as knife line, flower width be present, if there is mass defect, adjust accordingly immediately, if color is partially deep, diluent can be added Required color is transferred to, or suitably reduces ink viscosity, increase scraper pressure is untill identical with former state.Treat that product meets After quality standard, can normally it produce.

1.12 winding

Winding A axles are removed, refill is inserted in aerating in axle and holds out against refill, then Scroll is put into rotary arm, and Scroll both ends are locked, adhesive tape is wrapped with paper core, film is bonded on adhesive tape, starts Scroll and starts to wind.Winding Power is unsuitable excessive, and neat with product winding, not sliding is advisable, general tension decay control in 6kg, constant tensile control in 8kg, when After a roll of film roll is complete, on cleavable change of lap to B axle.The installation method of B axle refill is identical with A axles.

1.13 last volume

During last volume, Scroll both ends gear cap is opened, film roll is caught with trolley, starts the winding arm of force, allows axle and the arm of force Disengage, then bleed off the gas inside axle, take out Scroll.

1.14 fill in follow-up of quality list by regulation requirement, are put in film roll, and film roll is uprightly deposited into assigned position, stack When be careful not to film roll of damaging, wound, and stack neat.

1.15 change axle winding

Refill is installed in B axle by 1.12 operation sequences, starts rotary arm to take-up position, is changed automatically afterwards in place Volume.

1.16, which change axle, unreels

Film roll is installed in B axle by 1.6 operation sequences, posts adhesive tape, starts rotary arm to position is unreeled, in place after Carry out automatic change of lap.

1.17 shut down

1.17.1 holdback clutch, turn off drier, air blower and automatically to covering instrument power supply, speed is transferred to idle running position Put.

1.17.2 print roller is locked, scraper is disengaged, picks solvent with cotton yarn and clean up scraper.

1.17.3 pump ink supply is stopped, cleaning plate surface pours out residual ink, and be sealed against until noresidue ink It is good, it is put into assigned position.

1.17.4 with solvent by pump wash cycles 2-3 times.

1.17.5 stop main motor, turn off general supply and all control power supplys.

Work after 1.18 shutdown

1.18.1 the printing plate no longer used time, printing plate is unloaded, cleaned up, stamped butter or transformer oil, be positioned over warehouse, One group of print roller should put together, and stick mark, in case looking into use at any time.

1.18.2 unload unspent base material and retract storehouse, sweep ground health, the ink and deflector roll on ground On ink clean up, and no refill and defective in quality often volume residue film are deposited into assigned position, and heap Put neat.Fill in the first inspection record of the record of production and quality on request, it is desirable to each single item have to fill out it is clear, have neat handwriting, and handle The condition of production on duty fill in it is clear, in favor of come off duty production.

1.18.3 in instrument on duty and measurer inserter cabinet and will place neat.

Intaglio printing qualifying point：

Print color-sequential：Plastic sheeting is printed with Biao Yin and Li Yin two ways.

Print tension force：Printing tension force is the important parameter of typography, and it, which sets, is set according to the base material of printing, Its value is optimal using alignment, the minimum force collected.

Drying temperature：The control of drying temperature depends primarily on material.Squeegee pressure：Print the pressure of rubber impression roller Power.

Ink viscosity：The viscosity precise control of ink and uniformity are an important factor for influenceing print quality.Scraper：Scrape Knife with being an important ring in intaglio plate.Roller management：Keeping, placement, prepress treatment are all quite crucial.The management of residual ink： Using, whether keeping method appropriate can all influence product quality.

The management of raw material：The selection of raw material and application method can all influence product quality.Intaglio printing quality critical The operation sequence at control point.Drying temperature：Its control depends primarily on material property, in addition also with process conditions, pattern area, Ink property and ink film thickness etc. are relevant.Plastic sheeting easily by thermal softening, extends under tension.Therefore, its drying temperature No more than 70 DEG C.In plastic film printing, different ink need different drying temperatures, such as 50-55 DEG C of tusche and other color inks, Chalk, 60-65 DEG C of gold, silver ink.For the drying temperature of plastic sheeting also with printing progress, picture and text area is related, refers to table.

Ink viscosity：

During printing, the accuracy and uniformity of ink viscosity are one of key points, be influence print quality an important factor for, Ink viscosity is big, and the effect of pigment transfer is poorer；When its is excessive, whole ink system is at saturation state, pigment etc. Material poor fluidity, easily focus on together, it is not easy to successfully pass in and out roller webpage.It is organic molten in ink as viscosity is too small Agent content is more, and the composition such as resin, pigment is relatively few, can not form smooth epithelium, layer of ink whiting, dim nothing after the drying Light, lack gloss.

When being printed, first have to adjust the viscosity of ink, the organic solvent mixed is poured into ink, makes it Viscosity be reduced to the degree for adapting to printing machine performance and condition.Viscosity mainly matches with print speed printing speed, in high speed printing The viscosity of ink, it is on the contrary then right.In usual print speed printing speed<Under 200mm/min, ink viscosity (No. 3 cups are surveyed) is generally：Chalk 12-15 seconds, color ink 14-17 seconds, tusche 13-16 seconds.Its correction conditions is：Viscosity removes the limit during shallow net, and high glaze will be asked for Limit.

Printing is drawn a design：To be carried out during printing sample under normal printing state, it is impossible to enter to pursue some form and aspect Enter and printed under improper printing state, including the following aspects：1., ink viscosity it is suitable.2., the new and old mixing of ink.3., scrape The position of knife contact is suitable.

The inspection management of raw material (ink, solvent, version rod)：Before being printed such as version rod, print post-processing operation code.

That is evaluated during printing is consistent, under same light source, using same instrument evaluation, such as：Standard sources does not contrast Evaluation.

The common points for attention of plastic sheeting color printing and solution：

1. dry too slow.If rate of drying too slowly, may result in ink precipitation, make deflector roll pollution, adhesion.

The rate of drying of 1.1 retarder thinners is too slow, when fully can not meet to require with dedicated solvent, using quick-drying solvent.

1.2 editions depth are excessively deep, if having to use deeper version depth, should use quick-drying solvent, and slow down print Brush speed.

The scarce capacity of 1.3 dryers, drying capacity should mainly rely on air quantity (or wind speed), and temperature is then secondarily.

The raising of 1.4 print speed printing speeds is too fast, and print speed printing speed should be determined by dryer, while also be seen including residual solvent amount Degree including ink quality depending on.

2. run color.The printing ink transfer state of dash area forms tiny gradation unequal, unsightly.Especially green system Printing on it is especially common.

The concentration of 2.1 intaglio plates is too deep, and the viscosity of ink is too low, using the solvent of fast drying, is printed with highly viscous ink, Print speed printing speed can be improved as far as possible, accelerate drying.Check whether and misused solvent, and the mixing mistake of variety classes ink, more The ink renewed.

2.2 have impact on the mobility of ink for some reason, when absolutely not allowing to run color, should change net in plate-making Angle and line number.

The temperature of 2.3 ink is low, is heated before use with hot water etc..

3. curling.This is the phenomenon that a kind of printed article crimps to inner side, and not only product is ugly, and is brought to secondary operation It is difficult.

Film expansion caused by 3.1 solvents, it should contact, be changed to as far as possible without using the solvent of film expansion with ink factory.

3.2 ink films and film because temperature, humidity change and caused by expansion rate it is not high, should be as far as possible from containing plasticization The ink of free carrier.In addition tried every possible means from plate-making and (reproducing tonal is come with shallower version deeply as far as possible) and at the film back side It is also a kind of method to be coated with anti-roll herbal leaven etc..

4. failure caused by deflector roll.Printing film be attached on deflector roll, formed pollution, on ink film produce point blank or Spot.

The rate of drying and print speed printing speed of 4.1 ink mismatch, and should use quick-drying solvent or reduce print speed printing speed, and fully Play the effect of chill roll.

4.2 ink and film bond are bad, and paraffin should be added in ink, to increase its fissility and rub resistance.

5. peeling.Ink some superficial drying in stamping ink pad, form one layer of epithelium.This epithelium is attached to roller On, the space of a whole page forms uneven, pick blade seratch, the phenomenon of pollution.

5.1 ink settings are too fast, or poor fluidity, and ink deposition has simultaneously been dried, just without using the too fast solvent of drying, Denaturalization phenomenon impairs the mobility of ink.Some showy polyethylene pipes are also a kind of method in stamping ink pad.

The structure of 5.2 stamping ink pads is bad, produces immobilising retentate portion, and the air spilt from drying machine has dried ink Top layer, try by stamping ink pad be made ink in printing process can Uniform Flow style.In addition, the air draft of drying machine should be made Amount is slightly larger than air output, and prevents air from being spilt from dryer.Covering methods should be taken if drying machine leaks out, do not make wind Onto ink.

6. anti-viscous print.The ink of previous version printing is again to the phenomenon on the space of a whole page of next edition.

The adhesion strength of 6.1 ink is insufficient, can refer to (Poor cohesion) item.

The ink film of 6.2 previous version printings is dissolved on next space of a whole page again, needs to note for the ink type being easily redissolved Anticipate, the ink of each version will use the relatively low solvent of dissolving power to dilute after the second edition.In addition, print speed printing speed is also an original slowly excessively Cause, so to improve speed.

7. arc crater

When carrying out heat-flash drying to printing surface, progress is dried rapidly in top layer, and the solvent for being sealed to the inside seethes with excitement suddenly It is ejected into surface.Anxious poly- ground hot-air seasoning can only promote the drying on top layer, therefore dryer is preferably with low temperature-high temperature-low Temperature or arch form temperature curve formula.Taken in addition in ink Qinghua using slow solvent is dried, to slow down dry speed.

8. gelation.Ink loses mobility, solidifies the phenomenon of agglutination.

8.1 gels due to low temperature, the temperature of gelation point should be kept above and ink is stirred.

8.2 are mixed into foreign matter or have misused solvent, should check whether because be mixed into moisture and caused by go bad, used variety classes with Ink or with wrong solvent.

8.3 due to chemical reaction, for the two liquid response type ink using isocyanates, if used remaining ink Critical deterioration just not used again.

It is lackluster, without reflecting feel possessed by ink or varnish 9. gloss is bad.

The bad major part of gloss is excessively caused by illumination, with drying condition close relation, bad more of gloss Number reason is that illumination is excessive.It is excessive to be not only illumination, air quantity is excessive, shortage of heat when, be also for obtaining due gloss Unfavorable, therefore control air quantity should be taken, the method for abundant heating, drying.

10. ghost image.In the ink traces phenomenon for not etching position and also shifting shadow formula of version.

The attachment of 10.1 ink is accumulated on the chromium face of version, is not scraped to the greatest extent and has been transferred on film by scraper, is rubbed with paper The chromium face of ink is adhered with, when serious or chromium plating again is tried, can also be solved sometimes with the method for renewing ink.

The ink of 10.2 previous space of a whole page printings is redissolved on the white empty face of next edition, in the image range of next space of a whole page Outside show the image of shallow faint colour.It should be noted during low-speed running.

11. residual solvent.

The organic solvent remained in printed article, in addition to the reason for blocking, crimping, it is smelly finally to also result in product generation Taste.

Due to ink performance, the degree of the residual solvent of various ink is and used adhesive organic solvent What gas permeation rate was inversely proportional, it is possible to say it is fixed numerical value, therefore various ink should be obtained from ink factory in advance The data of energy, with quick-drying solvent come the substantially no too big effect of the method for entourage's residual quantity.

12. residual quantity.The degree of residual quantity can be quantified easily come but in exceptional value with gas chromatograph It can smell to discern.

12.1 due to the drying condition or dry engine efficiency of ink film, using quick-drying solvent and using not companion When the excessive wind speed for having heat is dried, it only may promote superficial drying and prevent the solvent abjection of inside.Most effective fruit Drying, it is necessary to have make the temperature (high temperature) and time that solvent molecule diffuses out from image.

12.2 because the resin properties used in film, different types of thin film residue amount may have significant difference, because This should obtain the pre-knowledge about residual tendency from manufactory.Further for resin-coated film, especially for PVDC quilts Covering film degree of crystallization should be noted that.

13. netting twine.Ink solidification or netting twine in finger mark brush finish are transferred to the ink site state on film into burr shape, Each independent dot is formed in the dash area that should be coated with, net is formed and stops shape.

13.1 ink settings are too fast, the ink after transfer flow it is even before just dry solidification, and with ink with delay do it is molten Agent, doctor position is moved forward as far as possible, while should be noted that the hot blast spilt from dryer.

13.2 ink viscosities are too high, on the premise of ensureing that ink mobility is suitable, carried out as far as possible using low viscosity ink Printing.It is also a kind of effective method to improve print speed printing speed.

13.3 are made too wide in the stage of plate-making web, are insoluble by the operation on machine.In general, net Intaglio plate is more more unfavorable than lithographic plate.

14. the discoloration of printing color.

14.1 ink precipitation and separation in itself, pigment such as re-unite at the change, avoid the face that there were significant differences for specific gravity of ink Colour cell is closed.In addition, ink mobility can be impaired if being mixed into moisture in printing process, re-uniting for pigment is caused.

The transfer (printing area the changes or change with bottom ink site overlap condition) of 14.2 sites, in printing speed In every change condition such as degree, ink viscosity, the dot area below semi-tone, which becomes, turns to maximum, it is therefore necessary to keeps certain Condition.When bottom site and lower version site overlap condition chance coincidence when, it may appear that significant image change.Therefore Checked with magnifying glass printing product.

15. electrostatic obstacle.

Fire can be caused during the static discharge of accumulation because of spark, and the phenomenon of strip spot shape occurs at straight line position, Destroy the formation of image.

Electrostatic is that the film of the high resistance other materials different with potential difference contact, peel off, rub and produce, for having Although the film that electrostatic obstacle may occur can be using obstacle be mitigated the methods of antistatic agent, major part is insufficient, quiet Failure caused by electricity is most using winter.Because this period humidity is minimum, therefore countermeasure is water drenching and using humidification or to print Brush room imports vapor etc. to improve humidity.Film contacts metal plait ground connection is set to remove electrostatic in printing process simultaneously. It is also a kind of effective means that antistatic agent is added in ink, but the species as used, deal are improper, and obstacle bonding can occur With lamination obstacle, it is therefore desirable to which the method for deferring to ink manufactory uses.

16. adhesion is bad.Ink thickness, the state of non-binding power are not reached.Generally with (match fine jade point band) simple test Anomaly is whether there is in detection printing.

16.1 have misused solvent or have been mixed with different types of ink, should definitely avoid using.In order to prevent misapplying, Ying Jiang Indicate that the name of an article, date, model, ratio etc. are taken care of with surplus ink, in case using again.

The influence of 16.2 film for printing

One：Sided corona treatment degree is not good enough or because film moisture absorption is excessive, detects corona value with wetting tension dyne pen first Whether requirement is reached.Two：Due to being hindered by additive in film, the plasticizer that contains in film, surfactant, lubrication Agent etc. may interfere with ink adhesion variation, should be by the way of preheating.

16.3 due to ink albefaction and it is rotten cause poor adhesive force, solution can refer to (rotten) item.

16.4 dry deficiency, using the heater of dryer, heat in allowed limits.

It is 17. rotten.

Ink loses mobility, and viscosity abnormality rises, and gloss reduces, and causes to adhere bad, remaining ink can not be again With.

Solvent in ink reduces temperature due to the heat of vaporization of solvent, makes week when being dried on stamping ink pad and the space of a whole page The wet steam condensation in air is enclosed, causes the moisture in ink to increase., can in order to prevent that temperature declines caused by heat of vaporization With with delaying dry solvent.When how wet high fever is, there is considerable amount of moisture to be mixed into ink, therefore when occurring abnormal, should supplement new Ink is all changed.Used multiple surplus ink regularly should be filtered or be discarded due to having infiltrated many dust.

18. efflorescence.

Ink scuffing properties extreme degradation, it is the embrittlement of ink film in appearance even if gently rubbing ink efflorescence.

Dilute excessive ink and penetrate into the excessive efflorescence for forming extreme to film.Occur when with a kind of situation of wrong ink. It should check whether ink has albinism, be printed with appropriate viscosity.If problem cannot still solve, misuse Possibility is very big, should be contacted with ink factory.In order to prevent simple mistake, the easy experiment for doing adherence is critically important.

19. tone rendering is bad.In having the picture of gradation, from shadow part to the ink in bright portion, shape is shifted State lacks uniformity, occurs to block and shift bad.

The drying of 19.1 ink is too fast or viscosity is too high.Viscosity should be as far as possible low, and available dry slow solvent.

19.2 caused by clogging of the ink in version.Solution can refer to (space of a whole page blocking) item.

The 19.3 version shapes relevant, different with the state made a plate, it is also different that ink shifts difficulty or ease from print roller, it is therefore necessary to Grasp its characteristic.The clear portions of daily printing plate are easier to form blocking.

20. scraper mark.The ink for not having pattern part on the space of a whole page is not shaved by scraper, is being not allow for printing ink transfer Other parts occur linear pollution, with amplification sem observation stripe portion when, have the blank of wick-like in pollution portion center.

Whether the quality of materials of 20.1 scrapers and grinding are good, replaceable scraper or are ground, so that knife portion is slightly long, hardness Softer is suitable.

The surface state and cylinder offset in 20.2 editions (bottom chromium face), chromium plating hardness are advisable with height, in order to improve the flat of surface Slippery, burr part is eliminated, should carefully be ground.During generation problem, wiped using fine sandpaper or the method for chromium plating again is handled.

Impurity, coarse particles etc. are gathered at scraper in 20.3 ink, local to lift scraper, and should try one's best reduces ink Viscosity.In order to remove foreign matter, the wire netting that 120 mesh or so should be inserted in ink circulation system is filtered.

21. double exposure is bad.

The bad phenomenon of the lap in printed matter between ink occurs, from centre to clear portions tone, produces Defect spot.

With reference to (netting twine) item, squeegee pressure is reduced as far as possible, and impressing hardness of rubber roll is more low more suitable.Other solution ginsengs According to (netting twine) item.

22. smear

Ink overflows to be transferred to the rear that film advances with ligule not to be had on figuratum film.

Ink in intaglio plate mesh is printed on recess, and printing ink transfer holds to the position do not carved when the mobility of ink is bad Easily occur.Highly viscous ink is used as far as possible.To use quick-drying solvent, and printing is advisable at a relatively high speed.With the rubber of pressure roller Glue is softer, impressing is gentlier advisable., with reference to (rotten) item.

23. tangerine peel

Squamous mainly as ink lap generation pear skin or tangerine peel, it is common in the phenomenon of similar spot in printing.

Above preceding layer ink film during double exposure second layer color, preceding layer ink is dissolved by second layer solvent, in drying First two blend of colors produce convection current, form tangerine peel.Easily it is redissolved and is formed mainly due to ink, it is molten using quick-drying Agent is printed with the ink of viscosity higher.In addition, improving print speed printing speed, it is also effective method to make ink solidification.If still not When can solve, then it is problematic to be likely due to the performance of ink, should be contacted with ink factory.

24. albefaction.A piece of white is presented in picture after printing as having sprinkled flour, and produce adhesion it is bad, draw Phenomena such as trace.

When 24.1 ink are dried on the membrane surface, mixed solvent balance, insoluble resin, precipitation, gonorrhoea are caused With it is localized gelling.The special retarder thinner being correctly formulated should be used when resin albefaction occurs., should be with oil when can't such as solve Black factory's contact.

For 24.2 ink when film surface is dried, downmix enters moisture so that gonorrhoea, gel cause resin due at a temperature of It is insoluble, separate out, gonorrhoea and localized gelling, this is referred to as water-whiteization, is due to not supplemented according to the heat of vaporization of solvent What heat occurred.Slow drying solvent should be used or improve print speed printing speed, temperature is properly increased, increase intake.

25. foaming.A large amount of bubbles are produced in disc, foam splashes, causes site to come off, cause printed matter to pollute.

25.1 this be due to ink property caused by (this tendency of water-based ink is big), the defoaming of correct dose should be added Agent.Pay attention to excessively to promote to foam on the contrary as used.

The defects of 25.2 ink circulation system, the peripheral passage of ink is checked, avoid the direct drop of ink excessive.

26. dry too fast.The normal transfer of ink is destroyed, and occurs that double exposure is bad, and it is existing that the clear portions of version block etc. As.

26.1 ink and solvent seasoning are too fast, using slow drying solvent, but in view of the quantity of solvent in crude oil ink, Zhi Nengyong 30-50% slow drying solvent is adjusted, it is difficult to should be contacted when solving with ink factory.

If the hot blast of 26.2 baking ovens is blown on the space of a whole page, the exhaust air rate and intake of baking oven should be adjusted, to prevent that hot blast is outside Leakage.It is considered as taking covering measure when such as leaking out.

The air flow that 26.3 galleys nearby occur, avoids the wind from door, window, air-conditioning from being directly blown onto on the space of a whole page.

27. atomization.Unnet phenomenon is scraped not having figuratum position scraper occur.Printing ink transfer is on film, gutter Divide and also adhere to curing ink.The ink on film being contaminated is different from pick blade seratch, and the atomization of version occurs in planar.

27.1 due to blade wears or grinding it is bad reduce wiping effect, should change or re-grind scraper.From material The harder scraper of matter, increase line pressure are advisable.Pay attention to causing scraper to loosen due to vibration.

27.2, because the chromium plating quality of version is bad or abrasion causes damaged surfaces, fine sandpaper are used on the space of a whole page for producing atomization Wipe, it should be noted that the bias of version, chromium plating again when serious.

Impurity, coarse granule in 27.3 ink have jacked up scraper, bring damage to the space of a whole page, are inked as far as possible with light viscosity oil Brush.New ink is changed when problem is serious, such as can not still be solved, should dry or reduce print speed printing speed to the space of a whole page.

28. the space of a whole page blocks.Ink from the transfer in version generally should be fixed (usual 50-70%), but due to certain Reason and reduce, form the state that does not shift.This phenomenon is easily in version depth, superficial part distribution life.

28.1 ink are fixedly arranged on the space of a whole page, should refer to (drying is too fast) item.

Coarse granule, insoluble precipitate, dust in 28.2 ink etc. condense, and in printing process, lead in the circulation of ink The wire netting that 80-120 mesh is inserted in road is filtered.Resin, paraffin in ink etc. can try when separating out to be heated to ink (40-50℃)

28.3 have misused rotten ink or solvent.The ink redissolution property in printing, reference are reduced because of reaction product (gelation and rotten) item.Shutting down for machinery is avoided in addition, should try one's best.When not running for a long time, the space of a whole page should be fully cleaned Or continue to dally.

The mesh inwall lithography of 28.4 editions is bad.It is unfavorable to form smooth transfer of the version to ink, chromium plating again should be carried out Or correcting.

29. pin hole.The transfering state of ink forms some and is not transferred.Occurs small spot from the appearance Point.

On contained plasticizer, lubricant etc. rise to the surface in 29.1 films, normal transfer and the lubrication of ink are hampered. Should be preheated during printing, carry out film heating printing, such as can not, then should be contacted with film factory.

The viscosity of 29.2 ink is too high, and drying is too fast, or causes to shift, moisten sexual maladjustment the defects of resin, drops Low ink viscosity, and use slow drying solvent.If problem seriously if be probably ink the defects of, should be contacted with ink factory.

29.3 squeegee pressures are too small, the defects of plate-making, are probably that plate-making is problematic if pin hole position is regular, Check the impressing whether irregular damage of rubber roll.

29.4 hamper the normal transfer of ink due to the vesicle in ink, with reference to (bubble) item.

30. separate out.Ink dissolution on the space of a whole page of lower version on the previous space of a whole page, or pigment pass through ink shape on film Into the phenomenon of pollution.

30.1 ink are easily redissolved.Print speed printing speed is excessively slow, and film slides on the space of a whole page, the ink dissolution on the previous space of a whole page When, use quick-drying solvent.Print speed printing speed is improved as far as possible.As can not be still solved to separate out, and contacted with ink factory, change dissolving power Relatively low retarder thinner.

30.2 may also due to plasticizer dissolution contained in ink certain pigment and shift, especially dyestuff, Such case is very common, for the film of plasticizer-containing, should avoid using the ink that dyestuff is pigment.From the composition structure of pigment Upper its possibility for separating out and (also referred to as migrating) that is known that.The performance that a variety of colors ink should be asked for ink factory in advance provides Material.

31. after-tack.The printed matter ink layer rolled up is attached to next contact surface (being typically the back side of film), so as to hinder Backrush and printed matter pollution, the stripping of ink occurs.The previous stage after-tacked peeling-off sound when being backrush, or overlapping Partial ink pellet surface shows abnormal gloss.

31.1 underdries, avoid using, with reference to (residual solvent) item.

31.2, because temperature rises, cause ink portions to soften, should give full play to the effect of chill roll.Taken care of at cooling Printed matter.It is should be noted that when rewinding is examined and blocked because paper tube causes temperature anomaly to rise in the friction of pressure roller.

31.3 printing windings, rewinding can not be too tight when examining, and special thin film is paid particular attention to.Moving keeping In, printed matter was not fallen.

The adhesion of 31.4 extremes is bad, with reference to (adhesion is bad) item.

31.5 cohesiveness extremely deficiency, it is very weak using the printing epithelium adhesive force of metal ink, hold under the pressure of very little Easily adhere, it is necessary to give one's full attention to.

Affinity is too strong between 31.6 printing surfaces and the ink of contact surface, match Luo point, nylon, two sides sided corona treatment film etc. It is very strong with the affinity of ink, it is dangerous big, so being contacted in advance with ink factory, take appropriate countermeasure.

32. migration.

Pigment in ink passes through or through film, and move on the material touched (can also be sticky with food sometimes On), pollute.

In ink and film contained plasticizer, additive sometimes because of the water-soluble pigment solved in a part of ink and Moved in film, when temperature rises, problem becomes apparent from.The film of plasticizer and hydrophilic film have been used in the substrate, It should avoid using the ink containing the easily pigment of dissolving plasticizer and water.This color change may determine that from the appearance.Cause This should be taken into account that the conditions such as secondary operation and final use contact with ink factory.

33. batch bad.In order that film batches smoothly, while it is desirable to suitable smoothness, but smoothness deficiency or All cause problems when excessively.

33.1 ink film coated surfaces are not smooth enough or too smooth, should be with ink factory when the smoothness of ink in itself is bad Contact, adjust smoothness.Residual solvent also has an impact for smoothness.

33.2 electrostatic can make film close attachment form fold and can not batch when serious.Using destaticing for charging method Device plays negative interaction sometimes.Roof-cut resistence is answered to be checked.

Above-described is only embodiments of the invention, and the general knowledge such as known concrete structure and characteristic is not made herein in scheme Excessive description., without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art Several modifications and improvements are made, these should also be considered as protection scope of the present invention, and these are implemented all without the influence present invention Effect and practical applicability.The scope of protection required by this application should be based on the content of the claims, in specification The records such as embodiment can be used for the content for explaining claim.

Claims (4)

1. a kind of color printing technique, it is characterised in that comprise the following steps：

Step 1, film is got：Film is got by title material and specification, checks the flatness of film, whether observation coating materials has cruelly Muscle, scollop, scallop, stiff block, hole, booklet etc. do not conform to the situation of quality requirement, if there is the above situation, change the neck preferable film of quality；

Step 2, lock up：Roller is disposed across and lockd up on car, one is first fixed in one end of axle silently, axle is then passed through into version Roller, alignment pin groove location, make silently with roller tight connecting；It is silently vexed with a fixation to load an activity in the other end of axle Head, by fixed silently locking positioning, then rotation top position screw, activity is silently held out against with roller, it is impossible to there is a bit loosening, it is no Edition phenomenon is then easily walked, it is accurate to influence registering；

Step 3, scraper is filled：Current Combined scraper, with the 1.2 meters of wings operated on, smooth is mounted in combination cutter holder；

Step 4, stamping ink pad is installed：Disc is lain under roller between two parties, notices that disc can not encounter roller；

Step 5, ink is allocated：When allocating spot color, first weigh mass-tone, after weigh color matching, and color matching is slowly added in mass-tone, It is stirring while adding uniformly, be slowly added into solvent along bucket wall, it is stirring while adding, stirring 2 minutes after, by solvent along bucket wall slowly It is added in primary colors ink, it is stirring while adding；

Step 7, upper volume：Film roll outer packing is removed, is lying on fork truck, upper volume A axles are removed, axle is passed across into film roll paper Core, aerating hold out against film roll refill, push ahead fork truck, make the gear position of axle both ends alignment rotary arm, restart rotation The arm of force, the gear allowed on axle are matched, and axle both sides end cap is locked；Removing film roll surface has the film of mass defect, draws disconnected Neatly, when needing change of lap, adhesive tape, mucilage glue surface 35mm should be more than on the cross section note of film；

Step 8, film is worn：Film roll chieftain is pulled out, sequentially passes through each deflector roll in the portion of unreeling and dancer；Led through printing each unit Roller and roller platen；Through carry-over pinch rolls to Scroll；

Step 9, start debugging：Open that ink pumping source is gentle compresses switch, start ink pumps, ink is filled stamping ink pad；

Step 10, stamping ink pad is risen until ink can be submerged at roller 1/5, lays scraper, wherein, scraper and roller contact point Angle between tangent line is into 15-45 °；

Step 11, start air blower, restart drier and heated, and set heating-up temperature to 80-86 DEG C；

Step 12, start Scroll, restart main frame clutch, speed is adjusted to 30-40m/min, lay roller platen, start Printing；

Step 13, chromatography：Left hand point lives rubber roll, and point driving switch, the right hand are held clutch handle, on the basis of the first color, entered up and down The longitudinal chromatography of row, after the color of alignment second, sequentially chromatography in the same way, then on the basis of the first color, adjusting handle is with phase Same method carries out horizontal register successively, after manual chromatography alignment, that is, opens automatic electronic computer to version；Automatically it is by automatic to version The electronic scanner of registering instrument is completed, i.e., is automatically adjusted by the pulse signal on every group of photoelectric scanning head waveform monitor It is preceding a set of the distance between a set of with itself, make the photoelectric color subject distance 20mm between two sets constant；

Step 14, wind：Winding A axles are removed, refill is inserted in aerating in axle and holds out against refill, then Scroll is put into revolving force In arm, and Scroll both ends are locked, adhesive tape are wrapped with paper core, film is bonded on adhesive tape, started Scroll and start to wind, Winding tension is neat with product winding, does not slide and is defined, and tension decay control is in 6kg, and constant tensile control is in 8kg, when a wound membrane After having rolled up, on cleavable change of lap to B axle, the installation method of B axle refill is identical with A axles；

Step 15, last volume：Scroll both ends gear cap is opened, film roll is caught with trolley, starts the winding arm of force, allows axle and the arm of force Disengage, then bleed off the gas inside axle, take out Scroll；So far color printing technique is completed.

2. a kind of color printing technique according to claim 1, it is characterised in that in step 11, heating-up temperature is set as 85 DEG C.

3. a kind of color printing technique according to claim 1, it is characterised in that in step 5, if using the previous day used oil Ink, then press 3 after being filtered with 200 mesh filter screens:7 mass ratio, which is added in new ink, to be used in mixed way.

4. a kind of color printing technique according to claim 1, it is characterised in that in step 10, adjustment scraper pressure is in 15- Between 25kg.