阅读说明：本技术 一种紫光固化柔性版印刷机 (Ultraviolet curing flexographic printing machine ) 是由 贺志磐 洪家乐 王冰 秦启雄 曾晓杰 于 2020-06-24 设计创作，主要内容包括：本发明公开了一种紫光固化柔性版印刷机,包括：沿基材的输送方向依次排列的放卷单元、至少一柔性版印刷单元、以及收卷单元,所述柔性版印刷单元包括依次相切的压印辊、柔版辊和递墨辊,所述压印辊、柔版辊和递墨辊均设有驱动其转动的驱动装置,所述柔性版印刷单元的输出端设置有紫光固化单元,所述紫光固化单元发出的紫外光的波长范围为360～400nm。该柔性版印刷机采用紫光固化单元对基材上的油墨固化干燥,能耗低、噪音小、寿命长、并且固化效率较高；而波长为360～400nm的紫外光能够使得油墨的附着力达到良好的水平,其固化效果良好,保证了印刷品的质量。(The invention discloses a violet curing flexographic printing machine, which comprises: unreel unit, an at least flexographic printing unit and rolling unit of arranging in proper order along the direction of delivery of substrate, flexographic printing unit is including tangent embossing roller, flexographic roller and drop roller in proper order, embossing roller, flexographic roller and drop roller all are equipped with its pivoted drive arrangement of drive, flexographic printing unit's output is provided with purple light curing unit, the wavelength range of the ultraviolet ray that purple light curing unit sent is 360 ~ 400 nm. The flexographic printing machine adopts the violet curing unit to cure and dry the printing ink on the substrate, so that the energy consumption is low, the noise is low, the service life is long, and the curing efficiency is high; and the ultraviolet light with the wavelength of 360-400 nm can enable the adhesive force of the printing ink to reach a good level, the curing effect is good, and the quality of printed matters is guaranteed.)

1. A violet curing flexographic printing press comprising:

unreel unit (10), an at least flexographic printing unit (20) and rolling unit (30) that arrange in proper order along the direction of delivery of substrate, flexographic printing unit (20) are including tangent impression roller (21), gentle version roller (22) and drop roller (23) in proper order, impression roller (21), gentle version roller (22) and drop roller (23) all are equipped with its pivoted drive arrangement of drive, the output of flexographic printing unit (20) is provided with purple light solidification unit (40), the wavelength range of the ultraviolet light that purple light solidification unit (40) sent is 360 ~ 400 nm.

2. The violet-curing flexographic printing press according to claim 1, characterized in that:

flexographic printing unit (20) are including vertical frame (24), embossing roller (21), gentle version roller (22) and drop roller (23) all rotate the setting and are in vertical frame (24) are gone up and are down distributed in proper order by last, and the substrate passes through from the clearance between embossing roller (21) and gentle version roller (22).

3. The violet curing flexographic printing press according to claim 2, wherein:

a first transition roller (51) and a second transition roller (52) are respectively arranged on two sides of the upper part of the vertical frame (24),

and tensioning rollers (6) are arranged between the first transition roller (51) and the pressing roller (21), between the pressing roller (21) and the flexographic printing unit (20) and between the flexographic printing unit (20) and the second transition roller (52).

4. The violet-curing flexographic printing press according to claim 1, characterized in that:

the purple light curing unit (40) comprises a cooling roller (41) rotatably arranged above the embossing roller (21), and a purple light generator (42) is arranged on one side of the cooling roller (41).

5. The violet-curing flexographic printing press according to claim 1, characterized in that: the ultraviolet generator (42) is a mercury lamp or an LED lamp or an electrodeless lamp.

6. The violet curing flexographic printing press according to claim 5, wherein:

the ultraviolet generator (42) is an electrodeless lamp, the electrodeless lamp comprises a fixed seat (43), a microwave generator (44), a waveguide device (45), a lamp tube (46) and a shielding net (47) are arranged on the fixed seat (43), the waveguide device (45) is provided with an inner cavity with a downward opening, the output end of the microwave generator (44) and the lamp tube (46) are both positioned in the inner cavity, the shielding net (47) is installed at the opening of the inner cavity, and a resonant cavity is formed between the output end of the microwave generator (44), the waveguide device (45) and the shielding net (47).

7. The violet-curing flexographic printing press according to claim 1, characterized in that:

the unreeling unit (10) comprises a first vertical frame (11), a first rotating frame (12) which can rotate 180 degrees relative to the first vertical frame (11) and is fixed is arranged on the first vertical frame (11), and an unreeling roller (13) is arranged at the upper end and the lower end of the first rotating frame (12) respectively.

8. The violet-curing flexographic printing press according to claim 1, characterized in that:

the winding unit (30) comprises a second vertical frame (31), a second rotating frame (32) which can rotate 180 degrees relative to the second vertical frame (31) and is fixed is arranged on the second vertical frame (31), and a winding roller (33) is respectively arranged at the upper end and the lower end of the second rotating frame (32).

Technical Field

The invention relates to a violet curing flexographic printing machine.

Background

The existing flexographic printing machine mainly comprises a flexographic printing unit and a drying air box, wherein a base material passes through the flexographic printing unit, enters the drying air box, is dried by hot air, is cooled and is rolled, but the heating power of the hot air drying is high, the energy consumption is high, and the exhaust gas also pollutes the environment; moreover, the flexographic printing machine has a large transverse dimension, resulting in a long production line.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the flexographic printing machine for curing the printing ink by utilizing the purple light with the wavelength ranging from 360 nm to 400nm, and the printing machine has the advantages of higher printing ink curing efficiency and printing efficiency, stable printing quality and smaller occupied area.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the invention discloses a violet curing flexographic printing machine, which comprises: unreel unit, an at least flexographic printing unit and rolling unit of arranging in proper order along the direction of delivery of substrate, flexographic printing unit is including tangent embossing roller, flexographic roller and drop roller in proper order, embossing roller, flexographic roller and drop roller all are equipped with its pivoted drive arrangement of drive, flexographic printing unit's output is provided with purple light curing unit, the wavelength range of the ultraviolet ray that purple light curing unit sent is 360 ~ 400 nm. The flexographic printing machine adopts the violet curing unit to cure and dry the printing ink on the substrate, so that the energy consumption is low, the noise is low, the service life is long, and the curing efficiency is high; and the ultraviolet light with the wavelength of 360-400 nm can enable the adhesive force of the printing ink to reach a good level, the curing effect is good, and the quality of printed matters is guaranteed.

In a preferred embodiment of the present invention, the flexographic printing unit includes a vertical frame, the impression roller, the flexographic roller, and the ductor roller are rotatably disposed on the vertical frame and are distributed in this order from top to bottom, and the substrate passes through a gap between the impression roller and the flexographic roller. The flexographic printing unit with the structure can greatly shorten the length and the size of a production line, reduce the occupied area and improve the utilization rate of a production workshop. Of course, in other embodiments, the flexographic printing unit may be replaced with other configurations, such as satellite, stacked, etc.

In order to guide the conveying direction of the base material, a first transition roller and a second transition roller are respectively arranged on two sides of the upper portion of the vertical machine frame, wherein tensioning rollers are respectively arranged between the first transition roller and the pressing roller, between the pressing roller and the flexographic printing unit and between the flexographic printing unit and the second transition roller, so that the situation that the printing effect is poor due to the fact that wrinkles or surface looseness are generated on the surface of the base material is prevented.

In a preferred embodiment of the present invention, the violet curing unit includes a cooling roller rotatably disposed above the platen roller, and a violet light generator is disposed on one side of the cooling roller. The ultraviolet generator is a mercury lamp, an LED lamp or an electrodeless lamp.

Preferably, the ultraviolet generator is an electrodeless lamp, the electrodeless lamp comprises a fixed seat, the fixed seat is provided with a microwave generator, a waveguide device, a lamp tube and a shielding net, the waveguide device is provided with an inner cavity with a downward opening, the output end of the microwave generator and the lamp tube are both positioned in the inner cavity, the shielding net is installed at the opening of the inner cavity, and a resonant cavity is formed among the output end of the microwave generator, the waveguide device and the shielding net. The electrodeless lamp has higher irradiance and lower heat radiation than a mercury lamp, can be used for curing temperature-sensitive materials, has simple structure, slow light decay and longer service life, and avoids the influence on production and processing caused by frequent replacement of a UV light source, wherein the electrodeless lamp is composed of a microwave generator, a waveguide device and a lamp tube.

In order to shorten the time for replacing and unreeling the coil stock, the unreeling unit comprises a first vertical frame, a first rotating frame which can rotate 180 degrees relative to the first vertical frame and is fixed is arranged on the first vertical frame, and the upper end and the lower end of the first rotating frame are respectively provided with an unreeling roller.

In order to shorten the time for installing the rolling roller, the rolling unit comprises a second vertical frame, a second rotating frame which can rotate 180 degrees relative to the second vertical frame and is fixed is arranged on the second vertical frame, and the upper end and the lower end of the second rotating frame are respectively provided with the rolling roller.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic block diagram of one embodiment of the present invention;

fig. 2 is an exploded view of an electrodeless lamp.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

Referring to fig. 1, a violet curing flexographic printing press of the present invention comprises: unreel unit 10, an at least flexographic printing unit 20 and rolling unit 30 that arrange in proper order along the direction of delivery of substrate, flexographic printing unit 20 is including tangent impression roller 21, flexographic roller 22 and drop roller 23 in proper order, impression roller 21, flexographic roller 22 and drop roller 23 all are equipped with its pivoted drive arrangement of drive, flexographic printing unit 20's output is provided with purple light curing unit 40, the wavelength range of the ultraviolet ray that purple light curing unit 40 sent is 360 ~ 400 nm.

Curing the ink with different colors by using ultraviolet lamps with different wavelengths under the experimental conditions of 50 percent of humidity and 25 ℃ at room temperature, and testing the required curing energy (unit is mJ/cm) by using a light energy tester²) The following data were obtained:

wavelength of light/ink color	Red wine	Yellow colour	Blue (B)	Black colour	White colour (Bai)
						420nm	455	455	455	560	635
400nm	395	395	395	490	595
						385nm	400	400	400	500	600
360nm	410	410	410	515	610
						350nm	500	500	500	610	705

Therefore, the energy required for curing the ink with different colors by using the ultraviolet light with the wavelength of 360-400 nm is small.

The flexographic printing machine with the structure adopts the purple light curing unit 40 to cure and dry the printing ink on the substrate, so that the energy consumption is low, the noise is low, the service life is long, and the curing efficiency is high; and the ultraviolet light with the wavelength of 360-400 nm can enable the adhesive force of the printing ink to reach a good level, the curing effect is good, and the quality of printed matters is guaranteed.

Referring to fig. 1, as a preferred embodiment of the present invention, the flexographic printing unit 20 includes a vertical frame 24, the impression roller 21, the flexographic roller 22 and the transfer roller 23 are rotatably disposed on the vertical frame 24 and are distributed in sequence from top to bottom, and the substrate passes through a gap between the impression roller 21 and the flexographic roller 22. Referring to fig. 1, the corresponding driving devices respectively drive the impression roller 21 and the drop roller 23 to rotate counterclockwise and drive the impression roller 22 to rotate clockwise, and the flexographic printing unit 20 with the above structure can greatly shorten the length of the production line, reduce the floor area and improve the utilization rate of the production workshop. Of course, in other embodiments, the flexographic printing unit 20 may be replaced with other configurations, such as satellite, stacked, etc.

In order to guide the conveying direction of the substrate, a first transition roller 51 and a second transition roller 52 are respectively arranged on two sides of the upper part of the vertical frame 24, wherein tension rollers 6 are respectively arranged between the first transition roller 51 and the impression roller 21, between the impression roller 21 and the flexographic printing unit 20, and between the flexographic printing unit 20 and the second transition roller 52, so as to prevent the surface of the substrate from generating wrinkles or surface looseness, which results in poor printing effect.

In a preferred embodiment of the present invention, the violet curing unit 40 includes a cooling roller 41 rotatably disposed above the platen roller 21, and a violet light generator 42 is disposed on one side of the cooling roller 41. The ultraviolet generator 42 is a mercury lamp, an LED lamp, or an electrodeless lamp.

Referring to fig. 2, in some embodiments of the present invention, the ultraviolet generator 42 is an electrodeless lamp, the electrodeless lamp includes a fixed seat 43, a microwave generator 44, a waveguide device 45, a lamp tube 46 and a shielding net 47 are disposed on the fixed seat 43, the waveguide device 45 has an inner cavity with a downward opening, an output end of the microwave generator 44 and the lamp tube 46 are both located in the inner cavity, the shielding net 47 is mounted at the opening of the inner cavity, and a resonant cavity is formed between the output end of the microwave generator 44, the waveguide device 45 and the shielding net 47. The electrodeless lamp has higher irradiance and lower heat radiation than a mercury lamp, can be used for curing temperature-sensitive materials, has simple structure, slow light decay and longer service life, and avoids the influence on production and processing caused by frequent replacement of a UV light source, wherein the electrodeless lamp is composed of a microwave generator 44, a waveguide device 45 and a lamp tube 46. Here, the microwave generator 44 is a magnetron.

In order to shorten the time for replacing and unreeling the coil stock, the unreeling unit 10 includes a first vertical frame 11, a first rotating frame 12 which can rotate 180 degrees relative to the first vertical frame 11 and is fixed is arranged on the first vertical frame 11, and an unreeling roller 13 is respectively arranged at the upper end and the lower end of the first rotating frame 12.

In order to shorten the time for installing the winding rollers 33, the winding unit 30 includes a second vertical frame 31, a second rotating frame 32 which can rotate 180 degrees relative to the second vertical frame 31 and is fixed is arranged on the second vertical frame 31, and the upper end and the lower end of the second rotating frame 32 are respectively provided with one winding roller 33.

The above examples are merely preferred embodiments of the present invention, and other embodiments of the present invention are possible, such as a reasonable combination of the technical solutions described in the examples. Those skilled in the art can make equivalent changes or substitutions without departing from the spirit of the present invention, and such equivalent changes or substitutions are included in the scope set forth in the claims of the present application.