CN103057291B - The printing process of softly light basis weight multi-layered paper - Google Patents
The printing process of softly light basis weight multi-layered paper Download PDFInfo
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- CN103057291B CN103057291B CN201310029326.2A CN201310029326A CN103057291B CN 103057291 B CN103057291 B CN 103057291B CN 201310029326 A CN201310029326 A CN 201310029326A CN 103057291 B CN103057291 B CN 103057291B
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Abstract
The present invention discloses the printing process of a kind of softly light basis weight multi-layered paper, relate to printing machinery technical field, its method is first to needing the paper wood of printing to carry out pre-stretch-draw before printing, humidification is carried out to the paper wood after pre-stretch-draw, then compacting is carried out to the paper wood of stretch-draw humidification, more tightly packed paper wood is printed.Before paper wood stretch-draw, first carry out tensile strength test to this batch of paper wood, the tension values measuring the increment maximum of the corresponding tension force of unit extension amount in the tension stress-percentage elongation characteristic curve of this paper wood is stretch-draw referential data; Stretch-draw referential data is not less than to the pretensioned value of thrust of paper wood; With the width of paper wood, 100KN/M ~ 120KN/M is counted to the dynamics of paper wood compacting; Moisture content after paper wood humidification is 5% ~ 7%; Effectively control the accuracy of tension force, paper tape is not produced and waves and longitudinal wrinkles, ensure that the constant and stationarity of paper tape tension force in conveying, improve performance of undertaking the printing of, enhance productivity and the quality of production.
Description
Technical field
The present invention relates to printing machinery technical field, the softer quantitatively rolling paper wood that is lower, multilayer of especially a kind of quality carries out method for multicolor printing.
Background technology
In existing multichromatic printing tech, paper wood to be tensioned to a certain degree to be transported on assorted printing element by paper wood by guide roller and driven roller afterwards by unwinding device and to print by the paper wood of rolling paper wood.This printing process is for good toughness, and the paper wood that tensile strength is large can not exist the problem of multicolor overprint deviation.But the tightness softer for quality is less than 0.3g/cm
3, be quantitatively 10 g/m
2~ 27g/m
2rolling paper wood when carrying out polychrome printing, because the tensile property of paper wood is poor, the impact that tension variation and fluctuation are extended paper wood is very sensitive, and in addition, the softer paper wood of this quality is after process color roller compaction, and its tensile property can change.Therefore, adopt existing method for multicolor printing to print the softer paper wood of quality, change to some extent due to different phase in printing process and tension force and fluctuate, and multiple look roller is to the compacting of paper wood, paper wood can deform, gauffer, trace are fuzzy, register trouble, even transverse breakage.
Summary of the invention
Technical problem solved by the invention is to provide the printing process of a kind of softly light basis weight multi-layered paper, and the printing process of this softly light basis weight multi-layered paper not only can ensure the constant, steady of the tension force of paper tape, effectively can also control the accuracy of tension force.
In order to solve the problem, the technical solution used in the present invention is: the printing process of this softly light basis weight multi-layered paper, first to needing the paper wood of printing to carry out pre-stretch-draw before printing, the paper wood then to stretch-draw carries out compacting, then prints tightly packed paper wood.
In above-mentioned softly light basis weight multi-layered paper printing process technical scheme, technical scheme can also be more specifically: before described paper wood stretch-draw, first tensile strength test being carried out to this batch of paper wood, measures the tension stress of this paper wood--in percentage elongation characteristic curve, the tension values of the increment maximum of the corresponding tension force of unit extension amount is stretch-draw referential data; Described stretch-draw referential data is not less than to the pretensioned value of thrust of described paper wood; With the width of described paper wood, 100KN/M ~ 120KN/M is counted to the dynamics of described paper wood compacting.
Further: humidification is carried out to the paper wood after described pre-stretch-draw, then the paper wood compacting by humidification.
Further: the moisture content after described paper wood humidification is 5% ~ 7%.
Owing to have employed technique scheme, the present invention compared with prior art has following beneficial effect:
1, shape for the first time to paper tape, eliminate the vibration that paper tape produces due to pulling force fluctuation, ensure paper feed tensions constant, steadily, effectively control the accuracy of tension force.Before ensure that printing, paper tape has certain paper feed tension force, has coordinated printing zone tension force to regulate and control, ensure that the tension stability of printing machine in printing element interval, and the tension force finally completing sheet transfer system controls.
2, prestressed stretch-draw sizing is carried out to different base materials, effectively control the accuracy of tension force, paper tape is not produced wave and longitudinal wrinkles, not to be pulled off, ensure that the constant and stationarity of paper tape tension force in conveying, improve performance of undertaking the printing of, enhance productivity and the quality of production.
3, to humidification be carried out before paper tape pressurization, better ensure paper tape pressurization fixed effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the paper wood conveying device that the printing process of this softly light basis weight multi-layered paper uses.
Fig. 2 is A-A sectional view of Fig. 1.
Fig. 3 is the K direction view of Fig. 1.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is 4 unwinding unit schematic diagrames of the paper wood conveying device that the printing process of this softly light basis weight multi-layered paper uses.
Detailed description of the invention
This softly light basis weight multi-layered paper printing process first carries out pre-stretch-draw to needs printing paper wood before printing, the paper wood then to stretch-draw carries out humidification, then the paper wood compacting by humidification, then print tightly packed paper wood.
Below in conjunction with accompanying drawing embodiment, the invention will be further described:
Paper wood conveying device shown in Fig. 1, Fig. 5 mainly comprises 4 identical unwinding unit B, C, D, E, atomizing humidifier 6 and compression roll 4,5, each unwinding unit comprises unwinding device, paper wood tensioning apparatus, deviation correcting device, unwinding device is as Fig. 1, as shown in Figure 2, include be contained in unreel let off roll 18 in frame 30 be located at let off roll 18 side by unreel drive unit be connected drive unreel belt 15, unreel drive unit and have a motor controlled by variable-frequency governor 19 11, motor 11 is fixed on and unreels in frame 30, the output shaft of motor 11 is connected with driving wheel 36, driving wheel 36 is connected with synchronous pulley 34 by Timing Belt 35, wheel shaft and the driving shaft 33 of synchronous pulley 34 are socketed, driving shaft 33 is hinged with defeated paper frame 14, defeated paper frame 14 two ends are respectively equipped with two cydariform belt pulleys 31, 32, driving shaft 33 connects cydariform belt pulley 32, cydariform belt pulley 32 is connected by unreeling belt 15 with cydariform belt pulley 31, unreel when belt 15 moves and drive paper feed, defeated paper frame 14 lower end is connected with cylinder 17, unreels by the air pressure size adjustable of adjusting cylinders 17 pressure that belt 15 is applied to paper wood 16 surface.As shown in Figure 1, unreeling multiple guide rollers frame being provided with and forming paper tape output channel, fixing guide roller 21, 23, 24 and be contained in a dancer 22 be connected with on the swing arm 25 of tension spring 20 and constitute paper wood tensioning apparatus, dancer 22 is arranged at one end of swing arm 25, the other end and the sector gear 28 of swing arm 25 are affixed, and can swing around sector gear axle center 29, one end that swing arm 25 is equipped with dancer 22 is connected with tension spring 20, tension spring 20 is connected with the tension spring adjusting device that regulates tensioning degree, tension spring adjusting device has a pulley 12 mounting tension spring 20, the mounting bracket of pulley 12 is contained in by adjusting screw(rod) 13 and unreels in frame 30, tension spring 20 is around on pulley 12, when using printable fabric different, rotatable adjusting screw(rod) 13 regulates the pulling force of tension spring, the tension force of adjustment paper tape.When paper tape pulling force changes, dancer 22 will move up and down, thus absorbs vibration.In other embodiments, the mounting bracket of pulley 12 is contained in by adjusting screw(rod) 13 and unreels on parts that frame 30 is fixedly connected with.Sector gear 28 and the pinion 27 be arranged on the sensor 26 of wobble detection bar 25 turned position are connected with a joggle, and sensor 26 output is connected on the input of the variable-frequency governor 19 controlling motor speed; In paper tape course of conveying, during tension variation, dancer 22 is under the acting in conjunction of tension spring 20, swing arm 25 is driven to swing around sector gear axle center 29, drive pinion 27 to rotate a position, give sensor 26 1 signals, this signal is transported to variable-frequency governor 19 drive motor 11 and rotates simultaneously, thus change chart drive speed, realize pre-cable tensios control.After pre-stretch-draw, paper tape enters deviation correcting device after walking around guide roller 24, this deviation correcting device has a correction frame 10 that can rotate around back shaft, when there is skew in paper tape, photoelectric sensor 7 produces and outputs signal to deviation correcting device 8, and control linear driver 9 drives correction frame 10 to rotate to paper tape edge and gets back to initial position.The paper tape of 4 unwinding units B, C, D, E exports respectively after correction, and the paper tape of output converges superposition.Upstream paper wood output channel being positioned at two compression rolls 4,5 is provided with atomizing humidifier 6, carries out humidification to the paper tape after stretch-draw superposition.A pair compression roll 4,5 in paper wood output channel as shown in Figure 3 and Figure 4 crimps the paper tape after superposition mutually, makes paper tape compound.Compression roll 4 is contained in a movable roller frames 43, and roller frames 43 is contained in the hole of roller frames bearing 3 by guide post 1, and holddown spring 2 is housed between roller frames 43 and roller frames bearing 3; Rotary steering bar 1, passes to roller frames 43 by holddown spring 2 power, completes compression roll 4,5 exerting pressure to superposition paper tape; Compression roll 5 is affixed with synchronous pulley 37, synchronous pulley 37 is connected with synchronous pulley 40 by Timing Belt 38, synchronous pulley 40 is affixed with speed regulator 39 output shaft, the power shaft of speed regulator 39 to be connected with printing machine driven roller 42 by shaft coupling 41 and to keep same rotating speed, by the rotating speed of adjustment speed regulator 39 output shaft and the speed discrepancy of printing machine driven roller 42, the tensioning degree of the paper wood after to compacting compound can be controlled.
Embodiment one: roll web is arranged on let off roll 18, wears paper along paper wood output channel.Before paper wood stretch-draw, first to wide be 210mm, tightness is 0.224g/cm
3, be quantitatively 15.7g/m
2paper wood carries out tensile strength test, by GB/T12914-2008 " mensuration of paper and paperboard Zhang Qiangdu " defined test method, the tension stress of this paper wood is measured with tensile strength test instrument--in percentage elongation characteristic curve, the tension values of the increment maximum of the corresponding tension force of unit extension amount is 28KN/M, and this value is as tension force reference value; The pretensioned value of thrust of paper tape is not less than this stretch-draw referential data, according to tension force reference value, selects the tension spring 20 of D2 × D20, rotates adjusting screw(rod) 13 pairs of tension spring 20 pulling force and finely tunes, make the pretensioned value of thrust of paper tape reach 30KN/M.Control cylinder 17 makes to unreel belt 15 and is close to paper roll surface, unreels belt 15 under the driving of motor 11, drives paper roll to open, realize paper feed; Paper tape carries out pre-stretch-draw by paper wood tensioning apparatus; The paper tape of stretch-draw carries out converging superposition after deviation correcting device correction, paper tape after superposition carries out humidification through atomizing humidifier 6, moisture content after paper tape humidification is 7%, superposition paper tape compression roll 4,5 compacting by humidification, to multi-ply paper band compacting compound, the dynamics of compacting counts 100KN/M with the width of paper wood; In order to coordinate the regulation and control of printing zone tension force, moment is delivered to compression roll 4,5 from printing machine driven roller 42, regulate speed regulator 39 can change the rotating speed of compression roll 4,5, rotating speed and the printing machine rolling draught line speed of such compression roll 4,5 produce a differential, keep the stable of this differential just to keep the tension stability of printing machine in printing element interval; Simultaneously, change the rotating speed of compression roll 4,5, sensing element dancer 22 swing arm will move up and down, because sheet transfer system is a closed-loop system, this signal will feed back to rotating speed variable-frequency governor 19 regulating and controlling motor 11, affect sheet transfer system tension variation, the tension force finally completing sheet transfer system controls.Paper wood exports from compression roll 4,5 and enters printing zone, and the paper wood of printing element to tension stability prints, and its chromatography is accurate, and printing quality is high.
Embodiment two: roll web is arranged on let off roll 18, wears paper along paper wood output channel.Before paper wood stretch-draw, first to wide be 250mm, tightness is 0.235g/cm
3, be quantitatively 18.8 g/m
2paper wood carries out tensile strength test, by GB/T12914-2008 " mensuration of paper and paperboard Zhang Qiangdu " defined test method, the tension stress of this paper wood is measured with tensile strength test instrument--in percentage elongation characteristic curve, the tension values of the increment maximum of the corresponding tension force of unit extension amount is 31.36KN/M, and this value is as tension force reference value; The pretensioned value of thrust of paper tape is not less than this stretch-draw referential data, according to tension force reference value, selects the tension spring 20 of D2 × D20, rotates adjusting screw(rod) 13 pairs of tension spring 20 pulling force and finely tunes, make the pretensioned value of thrust of paper tape reach 35KN/M.Control cylinder 17 makes to unreel belt 15 and is close to paper roll surface, unreels belt 15 under the driving of motor 11, drives paper roll to open, realize paper feed; Paper tape carries out pre-stretch-draw by paper wood tensioning apparatus; The paper tape of stretch-draw carries out converging superposition after deviation correcting device correction, paper tape after superposition carries out humidification through atomizing humidifier 6, moisture content after paper tape humidification is 6%, superposition paper tape compression roll 4,5 compacting by humidification, to multi-ply paper band compacting compound, the dynamics of compacting counts 110KN/M with the width of paper wood; In order to coordinate the regulation and control of printing zone tension force, moment is delivered to compression roll 4,5 from printing machine driven roller 42, regulate speed regulator 39 can change the rotating speed of compression roll 4,5, rotating speed and the printing machine rolling draught line speed of such compression roll 4,5 produce a differential, keep the stable of this differential just to keep the tension stability of printing machine in printing element interval; Simultaneously, change the rotating speed of compression roll 4,5, sensing element dancer 22 swing arm will move up and down, because sheet transfer system is a closed-loop system, this signal will feed back to rotating speed variable-frequency governor 19 regulating and controlling motor 11, affect sheet transfer system tension variation, the tension force finally completing sheet transfer system controls.Paper wood exports from compression roll 4,5 and enters printing zone, and the paper wood of printing element to tension stability prints, and its chromatography is accurate, and printing quality is high.
Embodiment three: roll web is arranged on let off roll 18, wears paper along paper wood output channel.Before paper wood stretch-draw, first wide to paper is 400mm, and tightness is 0.25g/cm
3, be quantitatively 20.4g/m
2paper wood carries out tensile strength test, by GB/T12914-2008 " mensuration of paper and paperboard Zhang Qiangdu " defined test method, the tension stress of this paper wood is measured with tensile strength test instrument--in percentage elongation characteristic curve, the tension values of the increment maximum of the corresponding tension force of unit extension amount is 36.75KN/M, and this value is as tension force reference value; The pretensioned value of thrust of paper tape is not less than this stretch-draw referential data, according to tension force reference value, selects the tension spring 20 of D2 × D20, rotates adjusting screw(rod) 13 pairs of tension spring 20 pulling force and finely tunes, make the pretensioned value of thrust of paper tape reach 40KN/M.Control cylinder 17 makes to unreel belt 15 and is close to paper roll surface, unreels belt 15 under the driving of motor 11, drives paper roll to open, realize paper feed; Paper tape carries out pre-stretch-draw by paper wood tensioning apparatus; The paper tape of stretch-draw carries out converging superposition after deviation correcting device correction, paper tape after superposition carries out humidification through atomizing humidifier 6, moisture content after paper tape humidification is 5%, superposition paper tape compression roll 4,5 compacting by humidification, to multi-ply paper band compacting compound, the dynamics of compacting counts 120KN/M with the width of paper wood; In order to coordinate the regulation and control of printing zone tension force, moment is delivered to compression roll 4,5 from printing machine driven roller 42, regulate speed regulator 39 can change the rotating speed of compression roll 4,5, rotating speed and the printing machine rolling draught line speed of such compression roll 4,5 produce a differential, keep the stable of this differential just to keep the tension stability of printing machine in printing element interval; Simultaneously, change the rotating speed of compression roll 4,5, sensing element dancer 22 swing arm will move up and down, because sheet transfer system is a closed-loop system, this signal will feed back to rotating speed variable-frequency governor 19 regulating and controlling motor 11, affect sheet transfer system tension variation, the tension force finally completing sheet transfer system controls.Paper wood exports from compression roll 4,5 and enters printing zone, and the paper wood of printing element to tension stability prints, and its chromatography is accurate, and printing quality is high.
Claims (3)
1. a softly light basis weight multi-layered paper printing process, is characterized in that: first carry out pre-stretch-draw to the paper wood of needs printing before printing, the paper wood then to stretch-draw carries out compacting, then prints tightly packed paper wood; Before described paper wood stretch-draw, first tensile strength test being carried out to this paper wood, measures the tension stress of this paper wood--in percentage elongation characteristic curve, the tension values of the increment maximum of the corresponding tension force of unit extension amount is stretch-draw referential data; Described stretch-draw referential data is not less than to the pretensioned value of thrust of described paper wood; With the width of described paper wood, 100KN/M ~ 120KN/M is counted to the dynamics of described paper wood compacting.
2. softly light basis weight multi-layered paper according to claim 1 printing process, is characterized in that: carry out humidification to the paper wood after described pre-stretch-draw, then the paper wood compacting by humidification.
3. softly light basis weight multi-layered paper according to claim 2 printing process, is characterized in that: the moisture content after described paper wood humidification is 5% ~ 7%.
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| US8616671B2 (en) * | 2011-04-27 | 2013-12-31 | Eastman Kodak Company | Printing multi-channel image on web receiver |
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