A kind of intaglio press with independent tension system
Technical field
The utility model relates to printing technology, especially a kind of intaglio press with independent tension system.
Background technology
Roll web is the paper of being manufactured paper with pulp by paper machine, through rewinding machine cut be rolled into, meet the paper bobbin that national standard or user require width and diameter.The width of usual Chinese roll web has: 1575mm, 1092mm, 880mm, 787mm etc.Roll web requires that degree of tightness is consistent, trimming neat, joint is developed, and had obvious mark.For various industrial applications such as rotary printings, automatically packaging.
Web printing equipment is printed on the continuous volume of paper or other substrates, is sometimes printed on the two sides of paper simultaneously.Have in collection part and cover winding apparatus or cut folding apparatus, what usually have is also provided with paster, paper tension control device, mass colour automaton, alignment automaton, glazing device and drying baker etc.
Wherein, existing roll web gravure equipment aborning, must ensure tension stability in roll web production process.Normally utilize the tension control system of roll web, keep roll web tension stability in process of production, follow the trail of alignment colour code by probe, ensure the stability of polychrome printing alignment.In process of production, because elasticity when operation reason (as changed scraper) or roll web supplied materials own is irregular, paper tension in production all can be caused to change, thus cause tension force to beat, and affecting the alignment of color.Therefore require that the tension system of paper tension control device is constant, namely by a tenslator, (top roller that can move up and down is set, with the uncoiling equalising torque of paper roll uncoiling, the tension force of roll web is remained in constant value) control in all printing elements paper tension, thus ensure the accuracy of chromatography.But roll web production equipment usual paper road is very long, there is certain deficiency in this mode being controlled paper tension by a tenslator:
When localised tension changes, as occurred in a certain printing element, forme is beated or changes other adjustment work such as scraper, register trouble in this printing element can be caused true, thus make this colour cell occur deviation, then have influence on the accuracy of overall printing.And the tenslator of entirety cannot adjust local tension variation.
In addition, the fore side of intaglio press is different from the weight of driving side.Usual driving side installing main motor, power distribution equipment system etc., the counterweight of equipment is also mainly at driving side.After mounted intaglio press runs a period of time, can due to reasons such as device fabrication vibration and self counterweights, all can there is skew in various degree in the level of different colour cell, the printing element of usual equipment has different inclinations toward driving side.Like this, just cause paper operation in production not to be horizontal direction, and present waveform running orbit, cause uniform tension in order to have certain fluctuation, and affect the chromatography precision of each colour cell in production.Moreover, (judged by electric eye scanning cursor) when occurring that register trouble is true, when overall tenslator regulates, when the amplitude of accommodation is larger, web tension can great changes will take place, this just needs all printing elements to stop, and carries out overall paper tension and regulate, thus greatly have impact on printing efficiency.
Therefore, prior art has yet to be improved and developed.
Utility model content
The technical problems to be solved in the utility model is, the problem such as local modulation difficulty, inefficiency that the intaglio machine for web-fed printing for prior art adopts overall tenslator to bring.
The technical scheme that the utility model technical solution problem adopts is as follows:
With an intaglio press for independent tension system, described intaglio press comprises several printing elements and the conveying device for handling rolls coil paper, wherein, is all disposed with before each printing element:
For regulating a pair of web transport velocities roller setting up and down by controlling rotating speed;
And for by moving up and down the dancer regulating web tension.
Preferably, the described intaglio press with independent tension system, wherein, also comprises one for reading the scanning means of cursor position before each printing element.
Preferably, the described intaglio press with independent tension system, wherein, the number of described dancer is two.
Preferably, the described intaglio press with independent tension system, wherein, also comprises: arrange an adjusting device respectively in the left and right sides of roller: left adjusting device and right adjusting device.
Preferably, the described intaglio press with independent tension system, wherein, a described pair roller comprises: upper roller and bottom roller;
Wherein, upper roller is soft roller, and bottom roller is hard roller.Described upper roller and bottom roller are connected different drive units respectively.
Preferably, the described intaglio press with independent tension system, wherein, described upper roller and bottom roller synchronous axial system.
Preferably, the described intaglio press with independent tension system, wherein, also comprises a warning device for giving the alarm when there is overprint error before each printing element; Described warning device connects described scanning means.
Beneficial effect:
Intaglio press with independent tension system of the present utility model, by arranging independently tenslator before each printing element, independent paper tension adjustment is carried out to each printing element, thus when paper localised tension changes, localised tension can be adjusted in time, overall printing can not be affected, simultaneously, also achieve to detect in real time and regulate in real time, decrease waste, saved cost, there is very good application prospect.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the gravure printing apparatus of prior art.
Fig. 2 is the schematic diagram of the embodiment of the intaglio press with independent tension system of the present utility model.
Fig. 3 is the schematic diagram of adjusting device in the embodiment of the intaglio press with independent tension system of the present utility model.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly, clearly, referring to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
First, introduce the principle of gravure printing apparatus, intaglio printing is a kind of directly printing process, as shown in Figure 1, picture and text are directly produced on plate cylinder 1, stock 3 passes through between the impression cylinder 2 and plate cylinder 1 of rubber coating, described plate cylinder 1 has pit, after plate cylinder 1 inking (in the present embodiment, plate cylinder 1 carries out inking by immersing black groove 4), doctor 5 is utilized to be scraped off (then leaving the ink in pit) by the ink of plate cylinder 1 blank parts, then plate cylinder 1 contacts with impression cylinder 2, ink contained in pit is imprinted directly on thing 3.
Please continue to refer to Fig. 2, it is the schematic diagram of the embodiment of intaglio press with independent tension system.As shown in the figure, the described intaglio press with independent tension system comprises in several printing elements 10(figure and representing with three groups of printing elements) and for the conveying device 20 of handling rolls coil paper, wherein, be all disposed with before each printing element 10: for by controlling rotating speed and regulate a pair of web transport velocities roller setting up and down and for by moving up and down the dancer 100 regulating web tension.
Specifically, dancer 100 regulates web tension by moving up and down: with the uncoiling equalising torque of paper roll uncoiling, the tension force of roll web is made to remain in constant value: from large to small, thus uncoiling moment also can diminish reel diameter thereupon, dancer 100 also shift position thereupon.In the present embodiment, it can comprise test section (sensor), electronic control unit (open loop or closed-loop control) and enforcement division (dancer moved up and down).Described dancer 100 according to the parameter preset, can detect roll web speed of production and web diameter change, automatically moves up and down different distances, regulate web tension.In the present embodiment, the number of described dancer is two: the first dancer 110 and the second dancer 120 set gradually, by arranging two dancers, increase the scope of its adjustment of tonicity: when a dancer compared to existing technology regulates, the distance that fluctuates is comparatively large, easily causes vibration equipment; And two dancers only need to move up and down comparatively short distance, tension force adjustment in a big way can be realized.
In the present embodiment, described roller comprises: upper roller setting up and down and bottom roller; Wherein, upper roller is soft roller 210, and bottom roller is hard roller 220.Because each print couple all has its independently dancer 100, tension adjustment can be carried out by dancer 100, then will inevitably cause the paper sheet delivery between adjacent printed units can there are differences (namely go up after a colour cell moves up and down adjustment of tonicity by its dancer 100, then will inevitably affect its be transported to after the paper speed of a colour cell).Therefore, we, by arranging one group of roller, compensate it: regulate web transport velocities by controlling upper and lower roller rotating speed, thus it is accurate to ensure that the tension variation of each colour cell all can not affect the chromatography of each colour cell, meanwhile, also can not have an impact to the tension force of other colour cells.
In addition, when paper tension changes the adjustable range more than the independently tenslator of a printing element, tension force control and regulation can be carried out: such as: when the tension variation at printing element A place is larger by regarding itself and a rear printing element as an entirety, when exceeding the adjustable range of the tenslator of printing element A, then regard an entirety as by printing element A and at printing element B thereafter, carry out tension force control and regulation: now, the roller between printing element A with printing element B is separated.
Further, described upper roller and bottom roller synchronous axial system.Namely rotated by a drive unit driving rolls, regulated the transfer rate of paper by the rotating speed of roller, simultaneously, because equipment level offsets, cause paper running orbit out-of-level, by the adjusting device of described upper and lower roller, also play the effect flattening paper.In printing process, tilting also likely appears in paper, in order to ensure printing quality, as shown in Figure 3, can arrange an adjusting device respectively in the left and right sides of roller: left adjusting device 310 and right adjusting device (not shown), it is respectively used to the pressure (pressure to paper 6) regulating roller the right and left, thus when paper occurs tilting, regulated the horizontal level of cylinder by the adjusting device of correspondence, thus realize corresponding compensation.
In addition, one can also be arranged for reading the scanning means of cursor position: read cursor position information by scanning means (as electric eye) before each printing element, then pass in processor, compare with the numerical value preset, thus judge that whether chromatography is accurate, carry out control dancer 100 and roller moves, regulate the paper tension of this printing element.
Further, one is also comprised before each printing element for the warning device of give the alarm when there is overprint error (sound or flashing lamp lamp mode can be adopted); Described warning device connects described scanning means.
In sum, intaglio press with independent tension system of the present utility model, by arranging independently tenslator before each printing element, independent paper tension adjustment is carried out to each printing element, thus when paper localised tension changes, localised tension can be adjusted in time, overall printing can not be affected, meanwhile, also achieve and detect adjustment in real time in real time, decrease waste, save cost, there is very good application prospect.
Should be understood that; application of the present utility model is not limited to above-mentioned citing; for those of ordinary skills, can be improved according to the above description or convert, all these improve and convert the protection domain that all should belong to the utility model claims.