CN111231495B - Method for realizing waterless offset printing of web-based flexographic UV ink and its offset printing machine - Google Patents
Method for realizing waterless offset printing of web-based flexographic UV ink and its offset printing machine Download PDFInfo
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- CN111231495B CN111231495B CN202010194942.3A CN202010194942A CN111231495B CN 111231495 B CN111231495 B CN 111231495B CN 202010194942 A CN202010194942 A CN 202010194942A CN 111231495 B CN111231495 B CN 111231495B
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- 238000007645 offset printing Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007639 printing Methods 0.000 claims abstract description 129
- 239000011347 resin Substances 0.000 claims abstract description 83
- 229920005989 resin Polymers 0.000 claims abstract description 83
- 238000012546 transfer Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
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- 238000005096 rolling process Methods 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 7
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 4
- 229910052740 iodine Inorganic materials 0.000 claims description 4
- 239000011630 iodine Substances 0.000 claims description 4
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- 239000000126 substance Substances 0.000 abstract description 2
- 238000001723 curing Methods 0.000 description 7
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- 101000667083 Aquareovirus G (isolate American grass carp/USA/PB01-155/-) Non-structural protein 1 Proteins 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
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- 239000004814 polyurethane Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F5/00—Rotary letterpress machines
- B41F5/24—Rotary letterpress machines for flexographic printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F5/00—Rotary letterpress machines
- B41F5/04—Rotary letterpress machines for printing on webs
- B41F5/06—Rotary letterpress machines for printing on webs with several printing units in sequential arrangement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F5/00—Rotary letterpress machines
- B41F5/04—Rotary letterpress machines for printing on webs
- B41F5/16—Rotary letterpress machines for printing on webs for multicolour printing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Printing Methods (AREA)
Abstract
本发明公开了一种卷筒纸柔性版UV油墨无水胶印的实现方法，包括以下步骤,先将卷筒纸间歇式UV油墨胶印机的一个或多个印刷机组的印版滚筒版材更换为柔性树脂版，所述柔性树脂版的印刷图文部分高于空白部分，然后断开更换了柔性树脂版的印刷机组中水路系统与印版滚筒的连接，再调节该印刷机组传墨系统的进墨量；本发明还公开了一种卷筒纸柔性版UV油墨无水胶印机。本发明中，采用柔性树脂版作为印刷机组的印版滚筒版材，实现了卷筒纸间歇式UV油墨无水胶印，解决了印刷时因水斗液参与而出现的颜色不稳定和糊版问题，降低了生产制造成本，并且大大减少了有害物质的排放，应用前景广泛。
The present invention discloses a method for realizing waterless offset printing of web-fed flexible UV ink, comprising the following steps: firstly replacing the plate cylinder material of one or more printing units of a web-fed intermittent UV ink offset printing machine with a flexible resin plate, wherein the printed image and text portion of the flexible resin plate is higher than the blank portion, then disconnecting the connection between the water system and the plate cylinder in the printing unit replaced with the flexible resin plate, and then adjusting the ink intake of the ink transfer system of the printing unit; the present invention also discloses a web-fed flexible UV ink waterless offset printing machine. In the present invention, a flexible resin plate is used as the plate cylinder material of the printing unit, realizing web-fed intermittent UV ink waterless offset printing, solving the problems of color instability and plate sticking caused by the participation of fountain liquid during printing, reducing the production and manufacturing costs, and greatly reducing the emission of harmful substances, and having broad application prospects.
Description
Technical Field
The invention relates to the field of web printing, in particular to a method for realizing web flexographic UV ink waterless offset printing and an offset press thereof.
Background
The multi-color web intermittent UV ink offset press is widely applied in the label industry due to the characteristics of low plate making cost, high plate making efficiency, high speed of proofing production reflection and the like. The traditional label industry is limited by the capability of processing equipment and the production process after die cutting, and the equipment width is basically below 450 MM. With the research, development and popularization of large-format intermittent UV ink offset printing machines in recent years, the large-format intermittent UV ink offset printing machines are gradually developed and applied in the printing and packaging industry, and the application range is becoming wide.
The intermittent UV ink offset press with multicolor groups is a unit type and modularized printing device, each color group corresponds to one printing unit, the mechanical structure of the printing unit is similar to that of a single-sheet offset press, but the intermittent UV ink offset press with multicolor groups is required to complete printing registration among the multicolor groups, a tension control system, a paper deviation correcting system, an independent servo motor control system of the printing unit and a UV curing system are added, in order to save materials, the machine base moves among the units, the registration of the circumferential directions of plates among different color groups and the seamless butt joint of patterns among the circumferences of the plates are solved, meanwhile, the transverse movement of a plate cylinder can be realized, the problem of transverse registration is solved, the reasons of equipment registration precision are limited, and the intermittent UV ink offset press with multicolor groups adopts a printing mode of curing and wet pressing.
The multi-color group web intermittent uv ink offset press is applied more in the label industry, a plurality of self-adhesive materials are adopted based on label products, waste discharge and waste edges are arranged between patterns due to the die cutting production process, the patterns are discontinuous, and chromatic aberration among the patterns is not easy to show. With the application of large-format multicolor web intermittent UV ink offset press on packaging products, especially on cigarette packet color positioning frame paper, the color deviation between the seaming and the plate tail patterns in one plate periphery is obvious due to continuous patterns, and meanwhile, when offset printing reverse process is used, the problem of plate pasting of base oil is easy to occur, and the problems of color difference and plate pasting are difficult to trouble the whole industry.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for realizing intermittent waterless offset printing of web UV ink by adopting a flexible resin plate as a plate cylinder plate material of a printing unit and an offset press thereof.
The technical scheme of the invention is as follows:
a method for realizing web flexographic UV ink waterless offset printing, comprising the steps of:
Taking a web intermittent UV ink offset press;
replacing plate cylinder plates of one or more printing units of the web intermittent UV ink offset press with flexible resin plates, wherein the printing image-text part of the flexible resin plates is higher than the blank part;
disconnecting the water path system of the printing unit with the flexible resin plate replaced from the plate cylinder;
and adjusting the ink transfer amount of the ink transfer system of the printing unit.
Further, the replacement of the plate cylinder plates of one or more printing units of a web intermittent UV ink offset printing press with flexographic plates comprises the steps of:
Determining a printing unit needing to replace the flexible resin plate;
making a production imposition process of the flexible resin plate of the printing unit according to the production process requirement, and determining the imposition quantity and imposition peripheral dimension of the flexible resin plate to obtain a front imposition of the flexible resin plate;
manufacturing a flexible resin plate by using the aluminum plate base layer and the flexible resin layer;
carving or sun-curing the flexible resin layer in a laser carving or iodine lamp sun-curing mode according to the front face splice pattern of the flexible resin plate, so that the printing pattern part of the flexible resin plate is higher than the blank part;
According to the position of the layout positioning hole on the plate cylinder of the printing unit, a mounting hole is punched on the prepared flexible resin plate;
The plate surface of the plate cylinder of the printing unit is removed, and the perforated flexographic plate is attached to the plate cylinder.
Further, the flexible resin plate is an aluminum-based flexible resin plate and comprises an aluminum plate base layer and a flexible resin layer.
Further, the material of the flexible resin layer is matched with UV ink.
Further, the total thickness of the flexible resin plate is 0.4 to 0.45mm, wherein the thickness of the flexible resin layer is 0.2 to 0.25mm.
Further, the plate cylinder plate material of the printing unit for printing the spot color of the offset press is replaced by a flexible resin plate, and the plate cylinder of the printing unit for printing the fine dots keeps original plate material and a water feeding system, so that the combination of the water offset printing and the waterless offset printing is realized.
The web flexible plate UV ink waterless offset press comprises at least one first printing unit, wherein the first printing unit comprises a first ink duct, a first ink transfer mechanism, a first plate cylinder, a first blanket cylinder and a first impression cylinder, one end of the first ink transfer mechanism is positioned at an ink outlet of the first ink duct, and the other end of the first ink transfer mechanism is in butt joint with the first plate cylinder and is used for uniformly transferring ink in the first ink duct to a layout of the first plate cylinder; the plate surface of the first plate cylinder is a flexible resin plate, the printing text part of the flexible resin plate is higher than the blank part, the first plate cylinder is in pressure connection and opposite rolling with the first blanket cylinder for transferring ink onto the first blanket cylinder, and the first blanket cylinder is in pressure connection and opposite rolling with the first impression cylinder for printing the ink onto a printing stock.
Further, the flexible resin plate is an aluminum-based flexible resin plate and comprises an aluminum plate base layer and a flexible resin layer; the total thickness of the flexible resin plate is 0.4-0.45mm, wherein the thickness of the flexible resin layer is 0.2-0.25mm.
Further, the first ink transfer mechanism comprises a first ink fountain roller and at least one first ink form roller, wherein the first ink fountain roller is positioned at an ink outlet of the first ink fountain, and each first ink form roller is in press-fit and opposite-rolling connection with the first plate cylinder; and after the first ink fountain roller transmits ink to the press-connected first ink fountain roller, the ink is uniformly spread by rolling and separating the first ink fountain rollers and then is transmitted to each first ink fountain roller, and finally, the ink is transmitted to the first plate cylinder by each first ink fountain roller.
Further, the web flexographic UV ink-free offset printing press further comprises at least one second printing unit comprising a second ink fountain, a second ink transfer mechanism, a second plate cylinder, a second blanket cylinder, a second impression cylinder, and a waterway system; the waterway system is used for adding water bucket liquid to the non-printing image-text part of the second plate cylinder, one end of the second ink conveying mechanism is positioned at an ink outlet of the second ink bucket, and the other end of the second ink conveying mechanism is abutted with the second plate cylinder and used for uniformly conveying ink in the second ink bucket to the layout of the second plate cylinder; the second plate cylinder is in press-fit butt rolling with the second blanket cylinder and is used for conveying ink to the second blanket cylinder, the layout of the second plate cylinder is a common offset plate, and the second blanket cylinder is in press-fit butt rolling with the second impression cylinder and is used for printing ink on a printing stock;
The second ink transfer mechanism comprises a second ink fountain roller and at least one second ink form roller, the second ink fountain roller is positioned at an ink outlet of the second ink fountain, and each second ink form roller is in pressure contact and roll contact with the second plate cylinder; and a plurality of second ink distributing rollers are arranged between the second ink fountain roller and at least one second inking roller, after the second ink fountain roller transmits ink to the press-connected second ink distributing rollers, the ink is uniformly spread through mutual rolling and separation of the plurality of second ink distributing rollers and then is transmitted to the second inking rollers, and finally, the ink is transmitted to the second plate cylinder through the second inking rollers.
The beneficial effects are that: in the invention, the flexible resin plate is used as a plate cylinder plate material of a printing unit, and special ink for traditional flexible printing is not required, so that intermittent anhydrous offset printing of web UV ink is realized; through the change of the printing mode, a fountain solution (composed of fountain solution, alcohol and water) is not required in the printing process, the concept of water-ink balance is not provided, the problems of unstable color and burnt version caused by participation of the fountain solution in printing are solved, the inking quantity is stable, and the effect of a product is more stable when the ink is used for large-impression printing; in addition, as the fountain solution is not involved, the consumption of ink is reduced, fountain solution and alcohol are not needed, the problem that the fountain solution is acidic and can corrode the rubber roller is solved, the service life of the rubber roller is prolonged, the production and manufacturing cost is reduced, the emission of harmful substances is greatly reduced, and the printing method is an environment-friendly green printing technology and has wide application prospect.
Drawings
FIG. 1 is a schematic view of a printing unit in an offset printing press according to the prior art;
FIG. 2 is a front face layout of a flexographic plate;
FIG. 3 is a cross-sectional view of a flexographic printing plate;
FIG. 4 is a schematic illustration of the perforation of a flexographic plate;
FIG. 5 is a schematic view of a first printing unit;
fig. 6 is a schematic diagram of a combined printing of a first printing unit and a second printing unit.
In the figures, 11, first ink fountain, 12, first ink fountain roller, 13, first impression roller, 14, first ink fountain roller, 15, first plate cylinder, 16, first blanket cylinder, 17, first impression roller, 21, second ink fountain, 22, second ink fountain roller, 23, second ink fountain roller, 24, second ink fountain roller, 25, second plate cylinder, 26, second blanket cylinder, 27, second impression roller, 28, waterway system, 151, aluminum plate base, 152, flexible resin layer, 153, printed image portion, 154, blank portion.
Detailed Description
In order to better understand the technical solution in the embodiments of the present invention and make the above objects, features and advantages of the embodiments of the present invention more comprehensible, the technical solution in the embodiments of the present invention is described in further detail below with reference to the accompanying drawings.
In the description of the present invention, unless otherwise specified and defined, it should be noted that the term "connected" should be interpreted broadly, and for example, it may be a mechanical connection or an electrical connection, or may be a connection between two elements, or may be a direct connection or may be an indirect connection through an intermediary, and it will be understood to those skilled in the art that the specific meaning of the term may be interpreted according to the specific circumstances.
Example 1
The embodiment of the realization method of the web flexible plate UV ink anhydrous offset printing comprises the following steps:
Taking a web intermittent UV ink offset press, wherein a schematic structure diagram of a printing unit of the web intermittent UV ink offset press is shown in FIG. 1;
Determining a printing unit needing to replace the flexible resin plate;
Making a production imposition process of the flexible resin plate of the printing unit according to the production process requirements, and determining the imposition quantity and imposition peripheral dimension of the flexible resin plate, wherein the front imposition of the flexible resin plate is shown in figure 2;
As shown in fig. 3, a flexographic printing plate is made using an aluminum plate base layer 151 and a flexographic resin layer 152; the total thickness of the flexible resin plate is 0.4-0.45mm, preferably 0.45mm, and the flexible resin plate is matched with the parameters of the existing offset press printing unit, so that the surface linear speed can be ensured to be the same as that of the existing offset press printing unit; the thickness of the flexible resin layer 152 is 0.2-0.25mm, preferably 0.2mm, and the material of the flexible resin layer can be basf NS73, the main components of the flexible resin layer are polyvinyl alcohol and polyurethane system, the material is matched with the UV ink, and the requirement of the ink on the surface of the plate and the requirement of transferring the ink from the plate to a printing stock are met; and is convenient for punching the mounting holes and accurately positioning and mounting.
Carving or sun-curing the flexible resin layer 152 according to the front face jigsaw pattern of the flexible resin plate by adopting a laser carving or iodine lamp sun-curing mode, so that the printed pattern part 153 of the flexible resin plate is higher than the blank part 154;
As shown in fig. 4, mounting holes are punched in the prepared flexographic plate according to the positions of the plate positioning holes on the plate cylinder of the printing unit;
The plate surface of the plate cylinder of the printing unit is removed, and the perforated flexographic plate is attached to the plate cylinder.
Disconnecting the water path system in the printing unit from the plate cylinder, and of course, directly removing the water path system of the printing unit;
the ink transfer system of the printing unit is regulated to enable the printing effect to meet the product requirement.
According to actual printing requirements, the plate cylinder plates of all printing units of the offset press can be replaced by flexible resin plates; the plate cylinder plate materials of the offset press part of the printing unit can be replaced by flexible resin plates, the plate cylinders of other printing units retain original plate materials and a water supply system, so that the combination of water offset printing and waterless offset printing is realized, the color reproduction of fine dots is met by adopting a water offset printing mode, the field color is realized by adopting a waterless offset printing mode, the fountain solution is saved, no waste water is discharged, and the energy conservation and the environmental protection are realized.
The plate cylinder adopts a flexible resin plate, and the printed image-text part 153 is higher than the blank part 154 (namely, the non-printed image-text part), and the blank part 154 is not inked, so that the printing plate is not burnt, the problems that the ink is emulsified when the water is big and small and the color is light and the ink is burnt when the ink is big and small and the non-image-text part is inked are solved, and particularly, the problem that the base oil is transparent ink and is not easy to be perceived after the printing plate is burnt when the printing plate is big impression are solved.
The intermittent web offset press adopts a three-in and three-out printing mode and a web pull-back mode, so that continuous pattern seamless splicing is realized by connecting one plate periphery pattern with the next plate periphery end to end, a process is needed for starting up to be stable in color due to the fact that water and ink are balanced, a period of time is needed for starting up to be stable in color, ink loss is more, the color is stable and slow, chromatic aberration is easy to generate, and the intermittent web offset press has the advantages of uniform inking, no obvious chromatic aberration, stable hue of products and high qualification rate due to the fact that water is not involved.
Example 2
As shown in fig. 5, one embodiment of the web flexographic UV ink dry offset printing press of the present invention includes at least one first printing unit comprising a first ink fountain 11, a first ink transfer mechanism, a first plate cylinder 15, a first blanket cylinder 16, and a first impression cylinder 17; the first ink transfer mechanism is used for uniformly transferring the ink in the first ink fountain 11 to the layout of the first plate cylinder 15, the first plate cylinder 15 is in pressure contact with the first blanket cylinder 16 for transferring the ink to the first blanket cylinder 16, and the first blanket cylinder 16 is in pressure contact with the first impression cylinder 17 for printing the ink on a printing stock.
The first ink transfer mechanism includes a first ink fountain roller 12 and at least one first ink form roller 13, in this embodiment, four first ink form rollers 13 are preferably provided; the first ink fountain roller 12 is positioned at an ink outlet of the first ink fountain 11, and four first ink fountain rollers 13 are in pressure contact and roll contact with the first plate cylinder 15; a plurality of first ink distributing rollers 14 are arranged between the first ink fountain roller 12 and the four first inking rollers 13, in this embodiment, twelve first ink distributing rollers 14 are preferably arranged, of course, fewer than twelve first ink distributing rollers 14 or more than twelve first ink distributing rollers 14 can be arranged according to the actual requirement of the product; after the first ink fountain roller 12 transfers ink to the press-connected first ink fountain rollers 14, the ink is uniformly spread by rolling and separating the twelve first ink fountain rollers 14, and then transferred to the four first ink fountain rollers 13 respectively, and finally transferred to the first plate cylinder 15 by the four first ink fountain rollers 13. The flexible resin layer is made of materials which are convenient for punching mounting holes and accurately positioning and mounting, is matched with UV ink, and meets the requirement of the ink on the surface of a printing plate and the requirement of transferring the ink from the printing plate to a printing stock; therefore, the UV ink of the existing offset press can be used for printing, and special ink for flexographic printing is not needed, so that the raw material cost is greatly reduced; for example, the flexible resin layer may be made of basf NS73, germany, and its main component is polyvinyl alcohol or polyurethane system.
The layout of the first plate cylinder 15 is made as follows:
as shown in fig. 2, a production imposition process is formulated according to the production process requirements, and the imposition quantity and the imposition peripheral dimension of the flexible resin plate are determined to obtain the front imposition of the flexible resin plate;
as shown in fig. 3, the aluminum plate base layer 151 and the flexible resin layer 152 are used for manufacturing the flexible resin plate, and after the manufacturing is finished, the total thickness of the flexible resin plate is 0.4-0.45mm, preferably 0.45mm, and the flexible resin plate is matched with the parameters of the existing offset press printing unit, so that the surface linear speed of the first printing unit can be ensured to be the same as that of the existing offset press printing unit; the thickness of the flexible resin layer is 0.2 to 0.25mm, preferably 0.2mm.
Carving or sun-curing the flexible resin plate in a laser carving or iodine lamp sun-curing mode according to the front face mosaic of the flexible resin plate, so that the printed graph-text part 153 of the flexible resin plate is higher than the blank part 154 (namely, the non-printed graph-text part);
as shown in fig. 4, mounting holes are punched in the prepared flexographic plate according to the positions of the layout positioning holes on the first plate cylinder 15;
The perforated flexographic plate is mounted to the first plate cylinder 15.
The flexible resin relief printing plate is adopted for the first plate cylinder, so that the concept of water-ink balance is not adopted, the problem that the ink is emulsified when the water is large and the ink is small in the traditional offset printing, the color is light is solved, the problem that the non-graphic part is inked when the ink is large and the ink is small in the traditional offset printing, and the problem that the printing plate is burnt due to the fact that the base oil is transparent ink in the large impression printing is solved. In addition, as no water participates, the ink is uniformly printed, obvious color difference does not occur, the hue of the product is stable, and the qualification rate is high.
Example 3
As shown in fig. 6, another embodiment of the web flexographic UV ink waterless offset printing press of the present invention includes at least one first printing unit and at least one second printing unit, the first printing unit having the same configuration as embodiment 2; the second printing unit comprises a second ink fountain 21, a second ink transfer mechanism, a second plate cylinder 25, a waterway system 28, a second blanket cylinder 26 and a second impression cylinder 27; the second ink transferring mechanism is used for uniformly transferring the ink in the second ink fountain 21 to the layout of the second plate cylinder 25, and the layout of the second plate cylinder 25 is a common offset plate (such as CTP plate adopting laser thermosensitive plate); the water path system 28 is used to fill the non-printing portion of the second plate cylinder 25 with water to create a balance of ink on the layout of the second plate cylinder 25, the second plate cylinder 25 is in pressure contact with the second blanket cylinder 26 for transferring ink to the second blanket cylinder 26, and the second blanket cylinder 26 is in pressure contact with the second impression cylinder 27 for printing ink onto a substrate.
The second ink transfer mechanism includes a second ink fountain roller 22 and at least one second ink form roller 23, in this embodiment, four second ink form rollers 23 are preferably provided; the second ink fountain roller 22 is positioned at an ink outlet of the second ink fountain 21, and four second ink fountain rollers 23 are in pressure contact and roll with the second plate cylinder 25; a plurality of second ink fountain rollers 24 are provided between the second ink fountain roller 22 and the four second ink form rollers 23, and in this embodiment, twelve second ink fountain rollers 24 are preferably provided; after the second ink fountain roller 22 transfers the ink to the press-connected second ink distributing roller 24, the ink is uniformly spread by rolling and separating the twelve second ink distributing rollers 24, and then transferred to the four second ink distributing rollers 23 respectively, and finally transferred to the second plate cylinder 25 by the four second ink distributing rollers 23.
According to actual printing needs, the web UV ink offset press with the multicolor groups can adopt all printing units as a first printing unit, and can also adopt part of printing units as a first printing unit, and the rest of printing units as a second printing unit, so as to obtain better printing effects, for example, the printing units for printing on-site colors adopt the first printing unit, and the printing units for printing fine dots adopt the second printing unit, thereby reducing production cost and reducing the influence on the environment under the condition of not influencing the printing effects.
Of course, the embodiment of the web flexible plate UV ink anhydrous offset press also comprises an unreeling mechanism, an unreeling traction mechanism, a feeding buffer mechanism, a feeding traction mechanism, a discharging buffer mechanism, a reeling traction mechanism, a reeling mechanism, a UV curing device and other devices, which are consistent with the intermittent offset press in the prior art, and are not repeated herein.
The undescribed portions of the invention are consistent with the prior art and are not described in detail herein.
The foregoing is only the embodiments of the present invention, and therefore, the patent scope of the invention is not limited thereto, and all equivalent structures made by the description of the invention and the accompanying drawings are directly or indirectly applied to other related technical fields, which are all within the scope of the invention.
Claims (5)
1. A method for realizing web flexographic UV ink waterless offset printing, comprising the steps of:
Taking a web intermittent UV ink offset press;
The method comprises the steps of replacing a plate cylinder plate material of a printing unit for printing on-site colors by a web intermittent UV ink offset press with a flexible resin plate, and reserving an original plate material and a water supply system by the plate cylinder of the printing unit for printing fine dots to realize the combination of water offset printing and waterless offset printing; the flexible resin plate is an aluminum-based flexible resin plate and comprises an aluminum plate base layer and a flexible resin layer; the material of the flexible resin layer is matched with UV ink; the printing image-text part of the flexible resin plate is higher than the blank part;
disconnecting the water path system of the printing unit with the flexible resin plate replaced from the plate cylinder;
regulating the ink transfer amount of the ink transfer system of the printing unit;
The replacement of the plate cylinder plates of one or more printing units of a web intermittent UV ink offset printing press with flexographic plates comprises the steps of:
Determining a printing unit needing to replace the flexible resin plate;
making a production imposition process of the flexible resin plate of the printing unit according to the production process requirement, and determining the imposition quantity and imposition peripheral dimension of the flexible resin plate to obtain a front imposition of the flexible resin plate;
manufacturing a flexible resin plate by using the aluminum plate base layer and the flexible resin layer;
carving or sun-curing the flexible resin layer in a laser carving or iodine lamp sun-curing mode according to the front face splice pattern of the flexible resin plate, so that the printing pattern part of the flexible resin plate is higher than the blank part;
According to the position of the layout positioning hole on the plate cylinder of the printing unit, a mounting hole is punched on the prepared flexible resin plate;
The plate surface of the plate cylinder of the printing unit is removed, and the perforated flexographic plate is attached to the plate cylinder.
2. The method of achieving web flexo UV ink dry offset printing according to claim 1, wherein the total thickness of the flexo plate is 0.4 to 0.45mm, wherein the thickness of the flexo resin layer is 0.2 to 0.25mm.
3. A web flexo UV ink waterless offset printing machine, characterized in that the implementation method of web flexo UV ink waterless offset printing according to claim 1 or 2 is adopted, comprising at least one first printing unit, wherein the first printing unit comprises a first ink fountain, a first ink transfer mechanism, a first plate cylinder, a first blanket cylinder and a first impression cylinder, one end of the first ink transfer mechanism is positioned at an ink outlet of the first ink fountain, and the other end of the first ink transfer mechanism is abutted against the first plate cylinder and is used for uniformly transferring ink in the first ink fountain onto a layout of the first plate cylinder; the plate surface of the first plate cylinder is a flexible resin plate, the printing text part of the flexible resin plate is higher than the blank part, the first plate cylinder is in pressure connection and opposite rolling with the first blanket cylinder for transferring ink onto the first blanket cylinder, and the first blanket cylinder is in pressure connection and opposite rolling with the first impression cylinder for printing the ink onto a printing stock.
4. A web flexographic UV ink waterless offset printing press according to claim 3, wherein said first ink transfer mechanism includes a first ink fountain roller and at least one first ink form roller, said first ink fountain roller being positioned at an ink outlet of a first ink fountain, each said first ink form roller being in press-fit engagement with a first plate cylinder; and after the first ink fountain roller transmits ink to the press-connected first ink fountain roller, the ink is uniformly spread by rolling and separating the first ink fountain rollers and then is transmitted to each first ink fountain roller, and finally, the ink is transmitted to the first plate cylinder by each first ink fountain roller.
5. The web flexographic UV ink waterless offset printing press of claim 3, further comprising at least one second printing unit comprising a second ink fountain, a second ink transfer mechanism, a second plate cylinder, a second blanket cylinder, a second impression cylinder, and a waterway system; the waterway system is used for adding water bucket liquid to the non-printing image-text part of the second plate cylinder, one end of the second ink conveying mechanism is positioned at an ink outlet of the second ink bucket, and the other end of the second ink conveying mechanism is abutted with the second plate cylinder and used for uniformly conveying ink in the second ink bucket to the layout of the second plate cylinder; the second plate cylinder is in press-fit butt rolling with the second blanket cylinder and is used for conveying ink to the second blanket cylinder, the layout of the second plate cylinder is a common offset plate, and the second blanket cylinder is in press-fit butt rolling with the second impression cylinder and is used for printing ink on a printing stock;
The second ink transfer mechanism comprises a second ink fountain roller and at least one second ink form roller, the second ink fountain roller is positioned at an ink outlet of the second ink fountain, and each second ink form roller is in pressure contact and roll contact with the second plate cylinder; and a plurality of second ink distributing rollers are arranged between the second ink fountain roller and at least one second inking roller, after the second ink fountain roller transmits ink to the press-connected second ink distributing rollers, the ink is uniformly spread through mutual rolling and separation of the plurality of second ink distributing rollers and then is transmitted to the second inking rollers, and finally, the ink is transmitted to the second plate cylinder through the second inking rollers.
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| CN111942043B (en) * | 2020-08-24 | 2021-11-30 | 重庆宏劲印务有限责任公司 | Secondary offset printing method for realizing high-precision roll-to-roll registration |
| CN114261180B (en) * | 2021-12-13 | 2022-12-13 | 杭州新耀激光科技有限公司 | Micro-nano optical lithography machine |
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| CA2156005A1 (en) * | 1994-08-16 | 1996-02-17 | John W. Bird | Multiple color offset press utilizing aqueous ink and waterless printing plates with interstation drying and extraction |
| JPH10180987A (en) * | 1996-12-27 | 1998-07-07 | Kyodo Kumiai Purin Techno | Removing device for ink adhered to non-image line part of waterless lithography, block printing machine, and lithographic printing method |
| CN102310670B (en) * | 2010-07-02 | 2013-08-21 | 深圳市东冠纸品有限公司 | Method for directly printing holographic images and texts |
| CN103481639B (en) * | 2013-08-30 | 2015-10-14 | 高斯图文印刷系统（中国）有限公司 | A kind of offset printing, flexo all-in-one |
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