CN111231495A - Implementation method and offset printing machine of UV ink waterless offset printing for web flexo - Google Patents

Abstract

The invention discloses a method for realizing waterless offset printing of UV (ultraviolet) ink of a web flexographic plate, which comprises the following steps of replacing plate cylinder plates of one or more printing units of a web intermittent UV ink offset press with a flexible resin plate, wherein the printing image-text part of the flexible resin plate is higher than the blank part, disconnecting a waterway system in the printing unit with the replaced flexible resin plate from a plate cylinder, and adjusting the ink feeding amount of an ink transfer system of the printing unit; the invention also discloses a web flexographic plate UV ink waterless offset press. In the invention, the flexible resin plate is used as a plate material of a plate cylinder of the printing unit, the web intermittent UV ink waterless offset printing is realized, the problems of unstable color and plate pasting caused by the participation of fountain solution during printing are solved, the production and manufacturing cost is reduced, the emission of harmful substances is greatly reduced, and the application prospect is wide.

Description

Implementation method and offset printing machine of UV ink waterless offset printing for web flexo

technical field

The invention relates to the field of web printing, in particular to a method for realizing waterless offset printing of a web flexographic UV ink and an offset printing machine thereof.

Background technique

Multi-color group web batch UV ink offset printing machine is widely used in the label industry due to its low plate-making cost, high plate-making efficiency, and fast response speed of proofing production. Due to the limitation of processing equipment capacity and production technology after die-cutting in traditional label industry, the width of equipment is basically below 450MM. With the research, development, promotion and use of large-format intermittent UV ink offset presses in recent years, it has gradually emerged and applied in the printing and packaging industry, and its application range has become more and more extensive.

The multi-color group web intermittent uv ink offset printing machine is a unit type, modular printing equipment, each color group corresponds to a printing unit, the mechanical structure of the printing unit is similar to that of the sheet-fed offset press, but the multi-color group web Intermittent offset printing machine, to complete the printing registration between multi-color groups, has added tension control system, paper deviation correction system, independent servo motor control system of printing group and UV curing system. The registration in the circumferential direction of the plate between different color groups and the seamless docking of the patterns between the plates, and the plate cylinder can be moved laterally to solve the problem of lateral registration. The UV ink offset press adopts the printing method of curing each group, wet pressing dry.

Multi-color web intermittent uv ink offset printing machines are widely used in the label industry. Most label products use self-adhesive materials. Due to the die-cutting production process, there are waste edges between the patterns, and the patterns are discontinuous. , the color difference between patterns is not easy to show. With the application of large-format multi-color group web intermittent UV ink offset printing machine on packaging products, especially on cigarette pack color positioning frame paper, due to the continuous pattern, there is color between the bite and the plate tail pattern in one plate week The deviation performance is more obvious. At the same time, when using the reverse process of offset printing, the base oil is prone to the problem of pasting, which cannot be effectively solved. The problems of color difference and pasting are the problems that plague the entire industry.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a method and an offset printing machine for intermittent waterless offset printing of web UV ink by using a flexible resin plate as a printing plate cylinder plate of a printing unit.

The technical scheme of the present invention is as follows:

A method for realizing waterless offset printing of web flexo UV ink, comprising the following steps:

Take a roll paper intermittent UV ink offset press;

Replacing the plate cylinder plates of one or more printing units of the web-fed intermittent UV ink offset printing press with a flexo resin plate, the printed graphic part of the flexo resin plate being higher than the blank part;

Disconnect the connection between the water system and the plate cylinder in the printing unit where the flexo resin plate has been replaced;

Adjust the ink transfer amount of the ink transfer system of the printing unit.

Further, replacing the printing plate cylinder plate of one or more printing units of the web intermittent UV ink offset printing press with a flexo resin plate includes the following steps:

Determine the printing unit that needs to replace the flexo resin plate;

According to the production process requirements, formulate the production imposition process of the flexo resin plate of the printing unit, determine the imposition quantity and imposition circle size of the flexo resin plate, and obtain the front imposition map of the flexo resin plate;

Use aluminum plate base layer and flexible resin layer to make flexible resin plate;

The flexible resin layer is engraved or printed by means of laser engraving or iodine lamp exposure according to the front imposition map of the flexible resin plate, so that the printed graphic part of the flexible resin plate is higher than the blank part;

According to the position of the layout positioning hole on the printing plate cylinder of the printing unit, punch mounting holes on the prepared flexible resin plate;

The plate of the printing plate cylinder of the printing unit is removed, and the perforated flexible resin plate is mounted on the printing plate cylinder.

Further, the flexible resin plate is an aluminum-based flexible resin plate, including an aluminum plate base layer and a flexible resin layer.

Further, the material of the flexible resin layer is matched with the UV ink.

Further, 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 plate cylinder plate of the printing unit used for printing solid colors of the offset press is replaced with a flexo resin plate, and the plate cylinder of the printing unit used to print fine dots retains the original plate material and the water supply system to realize water offset printing. Combination with waterless offset printing.

A web-fed flexographic UV ink waterless offset printing press, comprising at least one first printing unit, the first printing unit comprising a first ink fountain, a first ink transfer mechanism, a first printing plate cylinder, a first blanket cylinder and The first impression cylinder, one end of the first ink transfer mechanism is located at the ink outlet of the first ink fountain, and the other end is in contact with the first printing plate cylinder, so as to uniformly transfer the ink in the first ink fountain to the first printing plate cylinder. The layout surface of the plate cylinder; the layout surface of the first printing plate cylinder is a flexo resin plate, and the printed graphic part of the flexo resin plate is higher than the blank part, and the first printing plate cylinder and the first blanket cylinder are pressed against each other. , which is used for transferring the ink to the first blanket cylinder, and the first blanket cylinder and the first impression cylinder are pressed against each other to print the ink on the substrate.

Further, the flexible resin plate is an aluminum-based flexible resin plate, including 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 includes a first ink ductor roller and at least one first ink form roller, the first ink ductor roller is located at the ink outlet of the first ink duct, and each of the first ink form rollers is connected to the first ink form roller. The printing plate cylinders are pressed against each other; a plurality of first ink series rollers are arranged between the first ink ductor roller and at least one first ink form roller, and the first ink ductor rollers transmit the ink to the crimped first series of ink rollers. After the ink rollers, the ink is spread evenly by the mutual rolling and separation of a plurality of first ink series rollers, and then transmitted to the first ink rollers, and finally passed to the first printing plate cylinder by the first ink rollers.

Further, the web-fed flexographic UV ink waterless offset press further includes at least one second printing unit, and the second printing unit includes a second ink fountain, a second ink transfer mechanism, a second printing plate cylinder, a second printing unit, and a second printing unit. A blanket cylinder, a second impression cylinder and a waterway system; the waterway system is used to add water fountain liquid to the non-printing graphic part of the second printing plate cylinder, and one end of the second ink transfer mechanism is located at the ink outlet of the second ink fountain The other end is in contact with the second printing plate cylinder, which is used to uniformly transfer the ink in the second ink fountain to the layout surface of the second printing plate cylinder; the second printing plate cylinder and the second blanket cylinder are pressed against each other. , used to transfer the ink to the second blanket cylinder, the layout of the second plate cylinder is a common offset printing plate, and the second blanket cylinder and the second impression cylinder are pressed against each other to print the ink on the on the substrate;

The second ink transfer mechanism includes a second ink fountain roller and at least one second ink form roller, the second ink fountain roller is located at the ink outlet of the second ink fountain, and each of the second ink form rollers is connected to the second printing plate cylinder. Crimping and rolling; a plurality of second inking rollers are arranged between the second ink ductor roller and at least one second inking roller, and the second ink ductor rollers transfer the ink to the crimped second inking roller , through the mutual rolling and separation of a plurality of second inking rollers, the ink is spread evenly and then transmitted to each second inking roller, and finally transmitted to the second printing plate cylinder by each second inking roller.

Beneficial effects: In the present invention, the flexographic resin plate is used as the printing plate cylinder plate material of the printing unit, and the special ink for traditional flexographic printing is not required to realize intermittent waterless offset printing of web UV ink; There is no need to use water fountain solution (composed of fountain solution, alcohol and water) in the printing process, and there is no concept of ink balance, which solves the problems of color instability and smearing caused by the participation of water fountain solution during printing, and The ink supply is stable, and the effect of the product is more stable when it is used for large impression printing; in addition, because there is no participation of the water fountain, not only the amount of ink used is reduced, but also the use of fountain solution and alcohol is not required, and it also solves the problem of the water fountain. The acid will corrode the rubber roller, prolong the service life of the rubber roller, thereby reducing the manufacturing cost, and greatly reducing the emission of harmful substances. It is an environment-friendly green printing technology with wide application prospects.

Description of drawings

Fig. 1 is the structural representation of the printing unit in the offset printing press of the prior art;

Fig. 2 is the front face imposition of the flexible resin plate;

3 is a cross-sectional view of a flexible resin plate;

Fig. 4 is the punching schematic diagram of flexible resin plate;

Fig. 5 is the structural representation of the first printing unit;

FIG. 6 is a schematic diagram of combined printing of the first printing unit and the second printing unit.

In the figure, 11. The first ink fountain, 12. The first ink fountain roller, 13. The first ink form roller, 14. The first inking roller, 15. The first printing plate cylinder, 16. The first blanket cylinder, 17. The first Impression cylinder, 21. Second ink fountain, 22. Second ink fountain roller, 23. Second inking roller, 24. Second inking roller, 25. Second printing plate cylinder, 26. Second blanket cylinder, 27. No. Two impression cylinders, 28. Water system, 151. Aluminum plate base layer, 152. Flexible resin layer, 153. Printing graphic part, 154. Blank part.

Detailed ways

In order for those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above objects, features, and advantages of the embodiments of the present invention more clearly understood, the following describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings. for further details.

In the description of the present invention, unless otherwise specified and limited, it should be noted that the term "connection" should be understood in a broad sense. It is directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms can be understood according to specific situations.

Example 1

The embodiment of the realization method of the waterless offset printing of the web flexographic plate UV ink of the present invention comprises the following steps:

Take a web intermittent UV ink offset printing machine, and the schematic structural diagram of the printing unit of the web intermittent UV ink offset printing machine is shown in Figure 1;

Determine the printing unit that needs to replace the flexo resin plate;

According to the production process requirements, formulate the production imposition process of the flexo resin plate of the printing unit, determine the imposition quantity and imposition circle size of the flexo resin plate, and the front imposition diagram of the flexo resin plate is shown in Figure 2;

As shown in FIG. 3 , a flexible resin plate is made by using the aluminum plate base layer 151 and the flexible resin layer 152; the total thickness of the flexible resin plate is 0.4-0.45mm, preferably 0.45mm, which matches the parameters of the existing offset press printing unit , which can ensure that the surface line speed is the same as that of the printing unit of the existing offset press; 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, which mainly The composition is polyvinyl alcohol and polyurethane system, and the material is matched with UV ink, which meets the requirements of the ink attached to the surface of the plate and the requirements of transferring the ink from the plate to the substrate; and it is easy to punch installation holes and accurately locate and install.

The flexible resin layer 152 is engraved or printed by means of laser engraving or iodine lamp exposure according to the front face imposition of the flexible resin plate, so that the printed graphic portion 153 of the flexible resin plate is higher than the blank portion 154;

As shown in Figure 4, according to the position of the layout positioning hole on the printing plate cylinder of the printing unit, a mounting hole is punched on the prepared flexible resin plate;

The plate of the printing plate cylinder of the printing unit is removed, and the perforated flexible resin plate is mounted on the printing plate cylinder.

Disconnect the connection between the water system and the printing plate cylinder in the printing unit, of course, the water system of the printing unit can also be directly dismantled;

Adjust the ink transfer system of the printing unit to make the printing effect meet the product requirements.

According to the actual printing needs, the plate cylinder plates of all printing units of the offset press can be replaced with flexo resin plates; the plate cylinder plates of some printing units of the offset press can also be replaced with flexo resin plates, and the printing plates of other printing units can be replaced by flexo resin plates. The plate cylinder retains the original plate and the water supply system to realize the combination of water offset printing and waterless offset printing. The water offset printing method is used to meet the color reproduction of fine dots. Energy saving and environmental protection.

The printing plate cylinder of the present invention adopts a flexible resin plate, and the printed graphic part 153 is higher than the blank part 154 (ie, the non-printed graphic part), and the blank part 154 will not be inked, so the plate will not be pasted, which solves the problem of the traditional offset printing. When the ink is too small, the ink will emulsify, causing the problem of light color, and when the ink is too large, the non-graphic part will be inked and cause the problem of paste printing, especially when printing with a large impression, because the base oil is transparent ink, paste. Issues that are not easily noticed after the release.

The roll-fed intermittent offset printing press adopts the printing method of advancing three and retreating one, and adopts the method of pulling back the roll paper to realize the end-to-end connection of one pattern and the next pattern to complete the seamless splicing of continuous patterns. Balance requires a process, and it takes a period of time to start the machine to the color stabilization, resulting in a lot of ink loss, and the color stabilization is slow, which is easy to produce color difference, and the present invention does not have the participation of water, the ink is uniform, and there will be no obvious color difference. The hue is stable and the pass rate is high.

Example 2

As shown in FIG. 5 , an embodiment of the web-fed flexographic UV ink waterless offset printing press of the present invention includes at least one first printing unit, and the first printing unit includes a first ink fountain 11, a first ink transfer mechanism, a first printing unit A printing plate cylinder 15, a first blanket cylinder 16 and a first impression cylinder 17; the first ink transfer mechanism is used to uniformly transfer the ink in the first ink fountain 11 to the plate surface of the first printing plate cylinder 15, so The first printing plate cylinder 15 and the first blanket cylinder 16 are pressed against each other to transfer ink to the first blanket cylinder 16, and the first blanket cylinder 16 and the first impression cylinder 17 are pressed against each other, For printing inks onto substrates.

The first ink transfer mechanism includes a first ink duct roller 12 and at least one first ink form roller 13. In this embodiment, preferably four first ink form rollers 13 are provided; the first ink duct roller 12 is located in the first ink duct. 11, the four first inking rollers 13 are all pressed against the first printing plate cylinder 15; between the first ink fountain roller 12 and the four first inking rollers 13 The first ink series rollers 14, in this embodiment, preferably set twelve first ink series rollers 14, of course, according to the actual requirements of the product can also be provided with less than twelve or more than twelve first series ink rollers 14 Ink roller 14; after the first ink duct roller 12 transmits the ink to the crimped first ink series roller 14, the ink is spread evenly by the mutual rolling and separation of the twelve first ink series rollers 14, and then the ink is transmitted separately. To the four first inking rollers 13, and finally passed to the first plate cylinder 15 by the four first inking rollers 13. The material of the flexible resin layer is convenient for mounting holes and accurate positioning and installation, and is matched with UV ink to meet the requirements of ink adhesion on the surface of the plate and the transfer of ink from the plate to the substrate; therefore, existing offset printing can be used. It is not necessary to use special ink for flexographic printing, and the cost of raw materials is greatly reduced; for example, the material of the flexible resin layer can be BASF NS73, the main components of which are polyvinyl alcohol and polyurethane systems.

The layout making process of the first printing plate cylinder 15 is as follows:

As shown in Figure 2, formulate the production imposition process according to the production process requirements, determine the number of impositions and the size of the imposition cycle of the flexible resin plate, and obtain the front imposition map of the flexible resin plate;

As shown in FIG. 3 , a flexible resin plate is made by using the aluminum plate base layer 151 and the flexible resin layer 152. After the preparation is completed, the total thickness of the flexible resin plate is 0.4-0.45mm, preferably 0.45mm, which is the same as that of the existing offset printing machine. The parameters of the unit are matched to ensure that the surface linear speed of the first printing unit is the same as that of the existing offset printing press; the thickness of the flexible resin layer is 0.2-0.25mm, preferably 0.2mm.

According to the front imposition map of the flexible resin plate, the flexible resin plate is engraved or printed by laser engraving or iodine lamp drying, so that the printed graphic part 153 of the flexible resin plate is higher than the blank part 154 (that is, the non-printed graphic and text). part);

As shown in Figure 4, according to the position of the layout positioning hole on the first printing plate cylinder 15, a mounting hole is punched on the prepared flexible resin plate;

The punched flexographic resin plate is mounted on the first plate cylinder 15 .

The layout of the first printing plate cylinder of the present invention adopts a flexible resin letterpress, which does not have the concept of ink balance, and solves the problem that the traditional offset printing will emulsify the ink when the water is large and the ink is small, resulting in light color, and when the ink is too small, the non-picture The text part will be inked and cause the problem of pasting, especially when printing large impressions, because the base oil is transparent ink, it is not easy to detect after pasting. In addition, due to the absence of water, the present invention provides uniform inking during printing, no obvious color difference, stable color phase of the product, and high pass rate.

Example 3

As shown in FIG. 6 , another embodiment of the web-fed flexographic UV ink waterless offset press of the present invention includes at least one first printing unit and at least one second printing unit, and the structure and embodiment of the first printing unit 2 are the same; the second printing unit includes a second ink fountain 21, a second ink transfer mechanism, a second printing plate cylinder 25, a waterway system 28, a second blanket cylinder 26 and a second impression cylinder 27; The ink mechanism is used to uniformly transfer the ink in the second ink fountain 21 to the layout of the second printing plate cylinder 25, and the layout of the second printing plate cylinder 25 is a common offset printing plate (such as a CTP plate using a laser heat-sensitive plate). ); the waterway system 28 is used to add water bucket liquid to the non-printing graphic part of the second printing plate cylinder 25 to form an ink balance on the layout surface of the second printing plate cylinder 25, the second printing plate cylinder 25 and the The second blanket cylinder 26 is crimped and rolled to transfer the ink to the second blanket cylinder 26, and the second blanket cylinder 26 is crimped to the second impression cylinder 27 to print the ink on the substrate. superior.

The second ink transfer mechanism includes a second ink ductor roller 22 and at least one second ink ductor 23. In this embodiment, four second ink ductor rollers 23 are preferably provided; the second ink ductor roller 22 is located in the second ink duct. 21, the four second ink forming rollers 23 are all pressed against the second printing plate cylinder 25; between the second ink fountain roller 22 and the four second ink forming rollers 23 The second ink series rollers 24, in this embodiment, are preferably set with twelve second ink series rollers 24; after the second ink fountain rollers 22 transmit the ink to the crimped second ink series rollers 24, they pass through ten second ink series rollers 24. The mutual rolling and separation of the two second inking rollers 24 spreads the ink evenly and then transmits it to the four second inking rollers 23 respectively, and finally the four second inking rollers 23 to the second printing plate cylinder 25 .

According to the actual printing needs, the web UV ink offset press of the multi-color group can use the first printing unit for all printing units, or use the first printing unit for some printing units, and the second printing unit for the rest of the printing units, so as to obtain better Good printing effect, for example, the first printing unit is used for the printing unit for printing solid colors, and the second printing unit is used for the printing unit for printing fine dots, so as to reduce the production cost without affecting the printing effect. environmental impact.

Of course, the embodiment of the web flexographic UV ink waterless offset printing machine of the present invention also includes an unwinding mechanism, an unwinding traction mechanism, a feeding buffer mechanism, a feeding traction mechanism, a discharging traction mechanism, a discharging buffer mechanism, a receiving mechanism Devices such as the roll pulling mechanism, the winding mechanism, and the UV curing device are all consistent with the batch offset printing press in the prior art, and will not be repeated here.

The parts not described in the present invention are consistent with the prior art, and will not be repeated here.

The above are only the embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure made by using the contents of the description and the accompanying drawings of the present invention, directly or indirectly applied to other related technical fields, is equally applicable to the present invention. within the scope of patent protection.

Claims (10)

1. A method for realizing the waterless offset printing of UV ink of a web flexographic plate is characterized by comprising the following steps:

taking a roll of paper and intermittently using 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 printing image-text parts of the flexible resin plates are higher than blank parts;

disconnecting a water path system in the printing press group with the replaced flexible resin plate from the printing plate cylinder;

the ink transfer amount of the ink transfer system of the printing unit is adjusted.

2. Method for carrying out waterless offset printing with UV inks of web flexographic plates according to claim 1, characterized in that the exchange of the plate cylinder plates of one or more printing units of a web batch UV ink offset printing machine with flexographic plates comprises the following steps:

determining a printing unit needing to replace the flexible resin plate;

formulating a production makeup process of the flexible resin plate of the printing unit according to production process requirements, determining the makeup quantity and the makeup circumference size of the flexible resin plate, and obtaining a front makeup area of the flexible resin plate;

manufacturing a flexible resin plate by using the aluminum plate making base layer and the flexible resin layer;

carving or burning the flexible resin layer by adopting a laser carving or iodine lamp burning mode according to the splicing picture of the front surface of the flexible resin plate, so that the printing picture and text part of the flexible resin plate is higher than the blank part;

punching mounting holes on the prepared flexible resin plate according to the position of a plate surface positioning hole on a plate cylinder of the printing unit;

and taking down the plate surface of a plate cylinder of the printing unit, and mounting the punched flexible resin plate on the plate cylinder.

3. The method for enabling waterless, flexographic, UV-ink offset printing of web flexographic plates according to claim 1, wherein said flexographic plate is an aluminum-based flexographic plate comprising an aluminum plate base layer and a flexographic resin layer.

4. The method for performing waterless, flexographic, UV ink offset printing on web flexographic printing plates according to claim 3 wherein said layer of flexographic resin is made of a material compatible with UV ink.

5. Method for the realization of waterless, offset printing of UV inks with web flexo plates according to claim 3, characterised in that the total thickness of the flexo resin plate is 0.4-0.45mm, wherein the thickness of the layer of the flexo resin is 0.2-0.25 mm.

6. Method for the realization of waterless offset printing of UV inks of web flexography according to claim 1, characterized by: the plate material of the plate cylinder of the printing unit of the offset press for printing solid colors is replaced by a flexible resin plate, the plate cylinder of the printing unit for printing fine dots keeps the original plate material and a water feeding system, and the combination of the water-borne offset printing and the waterless offset printing is realized.

7. The UV ink waterless offset press for the web flexographic plates is characterized by comprising 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 abutted against the first plate cylinder and used for uniformly transferring ink in the first ink duct to the page of the first plate cylinder; the printing plate comprises a first plate cylinder, a first rubber cylinder, a first impression cylinder and a second plate cylinder, wherein the printing surface of the first plate cylinder is a flexible resin plate, the printing image and text part of the flexible resin plate is higher than the blank part, the first plate cylinder is in press-connection butt-rolling with the first rubber cylinder and used for conveying ink to the first rubber cylinder, and the first rubber cylinder is in press-connection butt-rolling with the first impression cylinder and used for printing the ink on a printing stock.

8. The web flexographic UV ink waterless offset printing press as recited in claim 7 wherein the flexographic plate is an aluminum-based flexographic plate comprising an aluminum plate base layer and a flexographic resin layer; the total thickness of the flexible resin plate is 0.4-0.45mm, wherein the thickness of the flexible resin layer is 0.2-0.25 mm.

9. The web flexographic UV ink waterless offset printing press as recited in claim 7 wherein the first transfer mechanism includes a first fountain roller and at least one first form roller, the first fountain roller being located at the ink outlet of the first fountain, each of the first form rollers being in pressure-facing contact with the first plate cylinder; a plurality of first inking rollers are arranged between the first ink fountain roller and the at least one first ink form roller, and after the first ink fountain roller transfers the ink to the first pressing connection ink roller, the ink is spread evenly by mutual rolling and separation of the plurality of first inking rollers and then transferred to the first ink form rollers, and finally the ink is transferred to the first plate cylinder by the first ink form rollers.

10. The web flexographic UV ink waterless offset press of any of claims 7-9, 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 water path system; the waterway system is used for adding fountain solution to the non-printing image-text part of the second printing plate cylinder, one end of the second ink transmission mechanism is positioned at the ink outlet of the second ink duct, and the other end of the second ink transmission mechanism is abutted against the second printing plate cylinder and is used for uniformly transmitting the ink in the second ink duct to the plate surface of the second printing plate cylinder; the second printing plate cylinder and the second rubber cylinder are in press-connection and butt-rolling to be used for transferring the printing ink to the second rubber cylinder, the printing surface of the second printing plate cylinder is a common offset printing plate, and the second rubber cylinder and the second impression cylinder are in press-connection and butt-rolling to be used for printing the printing ink on a printing stock;

the second ink transfer mechanism comprises a second ink duct roller and at least one second ink form roller, the second ink duct roller is positioned at an ink outlet of the second ink duct, and each second ink form roller is in press-connection with the second plate cylinder and is in counter-rolling; and a plurality of second ink form rollers are arranged between the second ink fountain roller and the at least one second ink form roller, after the second ink fountain roller transfers the ink to the second ink form roller in a pressing connection mode, the ink is spread uniformly by mutual rolling and separation of the second ink form rollers and then transferred to the second ink form rollers, and finally the ink is transferred to the second printing plate cylinder by the second ink form rollers.

Images