KR20210124760A - Uv curing system for ultraviolet inkjet printer having uv lamp block filter device and method thereof - Google Patents

Abstract

The present invention relates to a curing system for a UV inkjet printer having a UV lamp blocking device and a method thereof. According to the present invention, the curing system for a UV inkjet printer comprises a printhead, a UV lamp module, a UV lamp blocking device, a power supply device, and a control device. The printhead has a plurality of ink modules. The UV lamp module includes a plurality of UV lamps to be provided on both sides of the printhead to cure UV ink coated from the ink modules to a printing target. The UV lamp blocking device has a blocking film filter which is movable to the lower surface of the UV lamp module and selectively blocks the UV lamps. The UV lamp blocking device selectively blocks curing energy outputted from the UV lamps. According to the present invention, the curing system for a UV inkjet printer has the UV lamp blocking device selectively blocking curing energy outputted from the UV lamp module to adjust curing strength, curing section, and curing time to cure UV ink in accordance with the property of UV ink, printout quality, etc. to allow high-resolution high-quality printing.

Description

Curing system for UV inkjet printer having UV lamp blocking device and method therefor

The present invention relates to a curing system of a UV inkjet printer, and more particularly, is mounted on one side of a UV lamp module and is provided to be movable under the UV lamp module to selectively apply the curing energy of the UV lamp to the applied UV ink. It relates to a curing system and method for a UV inkjet printer having a UV lamp blocking device that blocks transmission.

In general, the widely used inkjet ink has a configuration including a colorant (pigment), a resin, a solvent, and an additive. Components included in the inkjet ink have various compositions depending on the range of ink application and the type of head applied to the printer. In particular, depending on the solvent, it is divided into water-based, solvent, and ultraviolet (UV) ink. Among them, aqueous and solvent inks have a problem of adversely affecting the human body and environment due to wastewater and odors generated during printing and curing.

Accordingly, we are expanding the scope of use by researching and developing eco-friendly UV (UV) curing inks that do not contain volatile organic compounds (VOC), do not generate wastewater, and are eco-friendly, mainly in developed countries such as Europe and the United States, and the domestic printing market has also paid attention to it belatedly. There is a trend that the range of use is gradually increasing. UV ink can be used for a variety of printing objects due to its properties that it dries and sticks instantly by simply irradiating UV light after being sprayed on the print medium. Therefore, UV ink can be widely used for absorbent substrates and can be most applied to overall industries such as commercial advertisements and photorealistic prints.

However, since UV ink for inkjet is ejected by the print head, it has a constant viscosity and does not change even when left at room temperature for a long time. is not applied to

In addition, UV inkjet printers are not only eco-friendly, but also have various data changes and high-quality printing in small quantities. Since most UV printers are used for commercial purposes, various techniques are applied to attract consumers' attention. In particular, special inks such as varnish ink for a glossy effect and white ink for vivid color expression is using For example, if the varnish coating is not applied, the overall color is a matt color, and it is difficult to express a high-concentration transparent color. Therefore, it is necessary to additionally spray the varnish ink. In addition, even the same type of ink exhibits different curing characteristics depending on the ink manufacturer. Therefore, in the conventional UV curing method, the ink surface is uneven, so high-quality printed matter cannot be obtained due to diffuse reflection, etc., and there are problems such as poor adhesion of the ink.

In addition, the conventional UV inkjet printer generally cures the curing process of the UV lamp sequentially according to the width of the pass. This causes a vitrification phenomenon in which the luminance and quality of the output are deteriorated by irradiating a constant curing energy despite the need to vary the degree of elapsed according to the luminosity and quality of various prints.

Korean Patent Publication No. 10-0869094 (published on November 17, 2008) Korean Patent Publication No. 10-1178096 (published on August 30, 2012) Korean Patent Publication No. 10-2004-0063175 (published on July 12, 2004) Korean Patent Publication No. 10-2011-0109728 (published on October 06, 2011)

It is an object of the present invention to provide a curing system and a method for a UV inkjet printer having a UV lamp blocking device for selectively irradiating curing energy of a UV lamp.

Another object of the present invention is to provide a curing system and method for a UV inkjet printer having a UV lamp blocking device that is movably provided on one side of a UV lamp module to selectively block curing energy of the UV lamp module.

Another object of the present invention is to provide a curing system and a method for a UV inkjet printer that includes a UV lamp blocking device and selectively transmits curing energy of a UV lamp module in units of passes of the ink module to realize high-quality printing. .

In order to achieve the above objects, the curing system of the UV inkjet printer of the present invention is characterized in that it includes a UV lamp blocking device that selectively blocks the curing energy of the UV lamp. The curing system of the UV inkjet printer of the present invention as described above uses a UV lamp blocking device that selectively blocks the curing energy output from the UV lamp module and adjusts the curing intensity, curing section, and curing time, so that the characteristics of UV ink, print By curing UV ink according to the quality of the product, high-resolution and high-quality printing is possible.

The curing system of the UV inkjet printer of the present invention according to this feature includes: a print head having a plurality of ink modules for applying UV inks of different colors to a print object in pass units; a plurality of UV lamp modules provided with a plurality of UV lamps, disposed on both sides of the print head, and outputting curing energy to cure UV ink applied to the print object; a UV lamp blocking device mounted on one side of the UV lamp module, having a blocking film filter movable in one direction, and selectively blocking the curing energy of the UV lamp by moving the blocking film filter to the lower end of the UV lamp module; and controlling the curing intensity according to the width of each of the plurality of passes of the ink module to uniformly output the overall UV energy of the UV lamp module, and moving the blocking film filter to selectively select the curing energy of the UV lamp module and a control device for controlling the delay curing by controlling the curing intensity according to the blocking film filter by blocking the film.

In this feature, the UV lamp blocking device, a case detachable to the UV lamp module; It is provided in plurality to have different widths of passes, and is provided to be replaceably mounted on the lower surface of the case for each output mode according to each pass and has a size to cover a part of the lower surface of the UV lamp module, horizontally or vertically the blocking film filter of an opaque material that is not diffusely reflected to selectively block the curing energy of the UV lamp module mounted on the case to be movable in the direction; and a driving unit for moving the blocking film filter in a horizontal or vertical direction to selectively block the UV lamp in response to a pass of the ink module under the control of the control device or manually.

In this feature, the blocking film filter is divided into at least two regions having different transparency, and the regions selectively block the curing energy of the UV lamp in response to at least one pass of the ink module to provide different The curing energy is transferred to the applied UV ink.

In this feature, the blocking film filter is cured with a sequential delay in curing time due to curing energy blocked by different transparency.

In this feature, the UV lamp blocking device is installed on the side of the UV lamp module to move the blocking filter in the horizontal direction, or installed at the rear of the UV lamp module to move the blocking filter in the vertical direction .

As described above, the curing system of the UV inkjet printer of the present invention includes a UV lamp blocking device that selectively blocks curing energy output from the UV lamp module to adjust curing intensity, curing section, and curing time, so that the UV ink UV ink is cured according to the characteristics of the product and the quality of printed matter to enable high-resolution and high-quality printing.

In addition, the curing system of the UV inkjet printer of the present invention is equipped with a UV lamp blocking device detachably to the UV lamp module to selectively harden the applied UV ink, so that the structure is simple, and therefore, manufacturers and products of UV inkjet printers It can be installed regardless of the back.

In addition, the curing system of the UV inkjet printer of the present invention differentially outputs curing energy according to the blocking film filter and applies a delay in the curing section to cure, thereby improving gloss control and quality. Vitrification, which is a quality problem, can be prevented.

In addition, the curing system of the UV inkjet printer of the present invention solves the problems in that there is a space between the diffuse reflection and the ink droplet compared to the conventional direct curing method, which solves the problems of surface adhesion, weak structure to water, and difficulty in color implementation. It is possible to improve the quality, such as color realization and adhesion, by adhering without space.

In addition, the curing system of the UV inkjet printer of the present invention enables the installation of a barrier filter at a low cost without additional changes to the UV lamp of the existing inkjet printer.

1 is a view showing a schematic configuration of a curing system of a UV inkjet printer having a UV lamp blocking device according to the present invention;
Figure 2 is a block diagram showing the configuration of the curing system of the UV inkjet printer shown in Figure 1;
3 is a view showing the configuration of the UV lamp module and UV lamp blocking device shown in FIG. 1;
4 is a view showing a configuration according to an embodiment of the UV lamp blocking device shown in FIG. 3, and
5 is a view showing a configuration according to another embodiment of the UV lamp blocking device shown in FIG.

Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited by the embodiments described below. This example is provided to more completely explain the present invention to those of ordinary skill in the art. Accordingly, the shapes of the components in the drawings are exaggerated to emphasize a clearer description.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying FIGS. 1 to 5 .

1 is a diagram showing a schematic configuration of a curing system of a UV inkjet printer having a UV lamp blocking device according to the present invention, and FIG. 2 is a block showing the configuration of a curing system of the UV inkjet printer shown in FIG. It is also

1 and 2, the UV inkjet printer 100 according to the present invention includes a UV lamp blocking device 140 in the curing system in order to selectively cure the UV ink applied to the print object 10, and , by using this to selectively block the curing energy output from the UV lamp module 130 to the UV ink applied to the print object 10 to adjust the curing intensity, curing section, and curing time.

For this purpose, the UV inkjet printer 100 of the present invention is provided in various forms such as, for example, a flat plate type, a roll to roll type, etc. A print head 120 including ink modules 122 of various colors for applying UV ink is provided, and the UV ink is applied to the print object 10 by moving it up, down, back and forth, left and right, and high-quality color printing is performed.

A UV lamp module 130 is provided on both sides of the print head 120, and the UV ink applied using this is cured so that the transparent high concentration is adjusted according to the degree of gloss and matt output. At this time, the UV lamp blocking device 140 moves to the lower surface of the UV lamp module 130 to selectively block the curing energy irradiated from the UV lamp module 130, and through the curing energy selectively transmitted through it Adjust the curing strength, curing period, and curing time.

Specifically, the UV inkjet printer 100 of the present invention is, for example, provided in a flat plate type, the stage 102, the print head 120, the head support 104, the UV lamp module 130, UV lamp blocking It includes a device 140 , a power supply 150 and a control device 110 . Therefore, the curing system of the UV inkjet printer 100 of the present invention is composed of a print head 120 , a UV lamp module 130 , a UV lamp blocking device 140 , a power supply device 150 , and a control device 110 . .

The stage 102 is fixed by seating the printing object 10 thereon. The stage 102 is coupled to both sides so that the head support 104 is movable in the Y-axis direction.

The head support 104 couples and supports the print head 120 , and moves the print head 120 up, down, front, back, and left and right under the control of the control device 110 . Here, the vertical direction is the Z-axis direction, the front-rear direction is the traveling direction of the print object 10 in the Y-axis direction, and the left-right direction is the X-axis direction indicating the printing direction of the print head 120 .

The print head 120 includes a plurality of ink modules 122 that apply different colors. The print head 120 is moved in a bidirectional printing manner. The bidirectional printing method is a method of printing by applying UV ink while moving the ink modules 122 in a zigzag manner. For example, the print head 120 performs printing of a first pass having a predetermined width while moving from right to left in the X-axis direction of the print object 10, and vice versa, moving from left to right while printing the second pass having the same width. Accordingly, the print head 120 applies UV ink to the print object 10 by repeating a plurality of passes.

The ink modules 122 are provided with inks of a plurality of basic colors, for example, cyan, magenta, yellow, black, and white, or are added to the basic colors. Inks of other special colors, for example, Light Magenta (LM), Light Cyan (LC), Light Black (LB), Orange, etc. are provided. The ink modules 112 are arranged in one row or multiple rows (eg, two, three or more rows) in the print head 110 . For example, when the ink modules 122 are arranged in three rows, the ink modules 122 have four primary colors including cyan (C), magenta (M), yellow (Y), and black (B); It may be provided in four basic colors, white (W) color, or more colors, and the arrangement of the ink module 122 may be variously provided according to the manufacturer, model, etc. of the UV inkjet printer 100 . . These ink modules 122 are provided with nozzles for spraying UV ink on the lower surface facing the printing object 10 .

The UV lamp module 130 is provided with a plurality of UV lamps (132 in FIGS. 4 and 5) for irradiating light in the direction of the print object 10, and is generally the same as or longer than the front and rear lengths of the ink modules 112. do. The UV lamps 132 are provided as, for example, UV light emitting diode (LED) lamps, and may be arranged in a plurality of rows in each of the UV lamp modules 130 .

The UV lamp module 130 is provided on both sides of the print head 120 , that is, on both sides in the X-axis direction. The UV lamp module 130 hardens the UV ink applied to the print object 10 by outputting curing energy from the UV lamps 132 . The UV lamp module 130 is set by dividing the UV lamps 132 into a plurality of sections according to the pass width of the ink module 122 by the control device 110, and curing of different sizes for each section or successively The output of the UV lamp 132 is adjusted to have an intensity. That is, the UV lamp modules 130 adjust the curing intensity by adjusting the voltage value or the current value supplied to the UV lamp 132 by the control device 110 . Of course, the UV lamp modules 130 may adjust the output of the LED lamp 132 in various ways, such as a pulse width modulation (PWM) method, a variable resistance method, and the like.

The UV lamp blocking device 140 includes a blocking film filter 146 that selectively blocks curing energy output from the UV lamp module 130 . The blocking film filter 146 is provided with an opaque material having a certain thickness so that the curing energy of the UV lamp 132 is not transferred to the applied UV ink, and is provided to be movable to the lower surface of the UV lamp module 130 to measure the degree of blocking. Adjust. The blocking filter 146 has a width substantially similar to or the same as that of the UV lamp module 130 and is made of an opaque material that does not reflect diffusely. The blocking film filter 146 may have different transparency (or transmittance) according to the characteristics of UV ink and the degree of print quality, or may be provided as at least two regions each having different transparency corresponding to a pass section.

To this end, the UV lamp blocking device 140 is provided on one side of the UV lamp module 130 . The UV lamp blocking device 140 is installed on the side of the UV lamp module 130 to move the blocking film filter 146 in the Y-axis direction, or is installed at the rear of the UV lamp module 130 to move the blocking film filter in the X-axis direction. It has a structure that can move (146).

That is, the UV lamp blocking device 140 is detachably provided on the UV lamp module 130 , and is mounted on one side of the UV lamp module 130 in a horizontal or vertical direction. The blocking film filter 146 is provided to be movable automatically or manually so as to cover the lower surface of the UV lamp module, and is moved vertically or horizontally to selectively block the pass of the print head 120 . The size of the blocking film filter 146 is provided to correspond to the cross section of the UV lamp 132 .

In addition, the blocking film filter 146 may have different transparency according to ink characteristics and print quality. That is, the blocking film filter 146 may be separately mounted to have different transparency according to print quality. In this case, curing energy is adjusted using the blocking film filter 146 according to the pass mode. For example, the blocking film filters 146 having different transparency may transmit the curing energy at 10% in the first pass width, 25% in the second pass width, and the like to delay curing in two steps.

The UV lamp blocking device 140 is mounted on one side of the UV lamp module 130 in a structure in which the blocking film filter 146 is detachable from the UV lamp module 130, and the blocking film filter 146 is installed in the Y-axis direction or the X-axis direction. direction to cover a portion of the lower surface of the UV lamp module 130 to selectively block the curing energy of the UV lamp module 130 at the corresponding position. The blocking film filter 146 blocks curing energy by at least one pass or a plurality of passes depending on the pass of the print head 120 , or completely blocks or partially blocks the curing energy according to the transparency according to the pass of the print head 120 . Transfer with applied UV ink. In this case, for example, the blocking film filter 146 blocks 10% of the curing energy in the first pass width and 25% of the curing energy in the second pass width by applying a delay time between each pass in two steps. can be hardened. To this end, a plurality of blocking film filters 146 are provided to have widths of different passes (eg, 2, 3, 4, 5, 6, 7, 8 passes, etc.), and a UV lamp for each output mode according to each pass. The blocking device 140 is provided so that it can be manually replaced and mounted.

In a typical inkjet printer, the UV lamp uses about 55 to 60% of curing energy to sufficiently cure the UV ink. Therefore, no problem occurs even when curing by adjusting the curing energy of some sections as much as the width of the path progressing. Therefore, in the present invention, the UV lamp 132 is blocked for the first or first and second pass sections of the print head 120 using a blocking film filter 146 having a size corresponding to the width of each pass of the print head 120 to block the UV lamp. The curing energy of (132) is selectively transferred to the applied UV ink for curing.

The power supply 150 receives AC power AC_IN from the outside and supplies driving power to the UV inkjet printer 100 under the control of the control device 110 . The power supply 150 supplies power to output curing energy from each of the UV lamps 132 .

And the control device 110 controls the curing intensity according to the width of each of the plurality of passes of the ink module 122 to constantly output the overall UV energy of the UV lamp module 130, and the blocking film filter 146. By moving to the lower end of the UV lamp module 130 to selectively block the curing energy of the UV lamp module 130, the curing time is adjusted according to the blocking film filter 146 to control delay curing.

To this end, the control device 110 is provided with, for example, a control panel including a controller 112 and a setting unit 114 , and an external, for example, a UV inkjet printer 100 and a computer or online connected to enable wired/wireless communication. Controls the overall operation of the UV ink printer 100 to receive data provided from, etc. and process color printing on the print object 10 . That is, the control device 110 sets the print quality, pass section, section group, curing intensity, delay time, etc. through the setting unit 114 , and the ink module 122 according to the print quality set through the controller 112 . and the UV lamp module 130 , the UV lamp blocking device 140 , and the power supply 150 are controlled so that each function is organically processed.

Therefore, in the UV inkjet printer 100 of the present invention, the ink modules 122 apply UV ink to the print object 10 through a plurality of passes, and use the UV lamp module 130 to cure the applied UV ink. High-resolution, high-quality color printing is output. At this time, the UV inkjet printer 100 of the present invention selectively selects the UV lamp module 130 so that the curing energy of the UV lamp module 130 is transferred to the selectively applied UV ink through the UV lamp blocking device 140 . By blocking the UV ink according to the degree of glossy and matte output, it supports high-resolution and high-quality color printing.

FIG. 3 is a view showing the configuration of the UV lamp module and the UV lamp blocking device shown in FIG. 1 , and FIG. 4 is a diagram showing the configuration of the UV lamp blocking device shown in FIG. 3 according to an embodiment.

3 and 4, the UV lamp blocking device 140 of this embodiment is disposed on each of both sides of the UV lamp module 130 and has a structure to move the blocking film filter 146 in the X-axis direction, that is, left and right. . That is, the UV lamp blocking device 140 of this embodiment includes a case 142 , a driving unit 144 , and a blocking film filter 146 . In addition, the blocking filter 146 is divided into two regions 146a and 146b having different transparency. In addition, the blocking filter 146 is provided in plurality to have different widths of passes (eg, 2, 3, 4, 5, 6, 7, 8 passes, etc.), and the case 142 for each output mode according to each pass. ) is provided so that it can be manually replaced and installed.

The case 142 is detachably provided in the UV lamp module 130 , and a driving unit 144 and a blocking film filter 146 are installed therein. As another example, the driving unit 144 and the blocking film filter 146 may be installed inside the UV lamp module 130 . The case 142 is provided with a blocking membrane filter 146 having a different path width at the bottom so that it can be replaced and mounted according to the output mode. Therefore, the blocking filter 146 may be mounted on the case 142 by selecting one for each output mode.

The driving unit 144 is provided with, for example, a motor and linearly reciprocates the blocking film filter 146 left and right to move to the lower surface of the UV lamp module 130 to selectively block curing energy.

And the blocking film filter 146 moves from the side of the UV lamp module 130 to the lower surface in order to selectively block the curing energy output from the UV lamps 132 of the UV lamp module 130 . The blocking filter 146 does not reflect diffused reflection, and the two regions 146a and 146b are made of an opaque material having different transparency.

In the UV lamp blocking device 140 of this embodiment, the control device 110 controls the driving unit 144 in response to the pass of the ink module 122 to direct the blocking filter 146 to the lower end of the UV lamp module 130 . By moving, the curing energy of the UV lamp module 130 is selectively blocked.

As another example, the UV lamp blocking device 140 manually moves the blocking film filter 146 to the lower end of the UV lamp module 130 without the control of the control device 110 to selectively select the curing energy of the UV lamp module 130 . may be blocked with

In this case, the driving unit 144 is provided with, for example, a guide rail, a rack, and a pinion to manually move the blocking membrane filter 146 in a straight line, and the blocking membrane filter 146 along the linear movement path of the blocking membrane filter 146 . For example, on one side of the case 142 , a gauge (not shown) in which an interval corresponding to the path of the ink module 122 is displayed is provided so as to control and confirm the movement interval (ie, the blocking interval).

Therefore, in the UV lamp blocking device 140 of this embodiment, the blocking film filter 146 is cured by regions 146a and 146b having different transparency at different positions such as only the front of the UV lamp 132 or the front and the middle of the UV lamp 132 . By setting the energy to transmit differently, and by moving the blocking film filter 146 to the lower end of the UV lamp module 130 automatically or manually in response to the pass width of the ink module 122 to be delayed through the blocked curing energy. , can improve the brightness and quality of various printed materials. At this time, the transparency of the blocking film filter 146 may be adjusted to suit the characteristics of the ink.

And FIG. 5 is a view showing a configuration according to another embodiment of the UV lamp blocking device shown in FIG. The UV lamp blocking device 140 ′ of this embodiment has a different arrangement position from the UV lamp module 140 , and its configuration is substantially similar to that of FIG. 3 .

Referring to FIG. 5 , the UV lamp blocking device 140 ′ of this embodiment is disposed at each rear of the UV lamp module 130 to move the blocking film filter 146 in the Y-axis direction, that is, back and forth. That is, the UV lamp blocking device 140 ′ of this embodiment also includes a case 142 , a driving unit 144 , and a blocking film filter 146c.

In the UV lamp blocking device 140 ′ of this embodiment, the driving unit 144 linearly reciprocates the blocking filter 146c back and forth to move it to the lower surface of the UV lamp module 130 . The blocking film filter 146c has the same transparency over the entire area.

Accordingly, the blocking film filter 146c is moved in the Y-axis direction corresponding to each pass of the ink module 122 or a section including a plurality of passes by the driving of the driving unit 144 to move the UV lamp module 130 to the moved position. It selectively blocks the curing energy output from the corresponding UV lamps 132 of the. At this time, the blocking film filter 146c varies curing according to the blocked energy to delay curing.

In the above, the configuration and operation of the curing system of a UV inkjet printer having a UV lamp blocking film filter device according to the present invention has been illustrated according to the detailed description and drawings, but this is only described by way of example, and the technical description of the present invention Various changes and modifications are possible without departing from the spirit.

100: UV inkjet printer
102: stage
104: head support
110: control device
120: print head
122: ink module
130: UV lamp module
132: UV lamp
140, 140' : UV lamp blocking screen filter device
146, 146a, 146b, 146c: blocking filter

Claims (5)

A curing system for a UV inkjet printer comprising:
a print head having a plurality of ink modules for applying UV inks of different colors to a print object in pass units;
a plurality of UV lamp modules provided with a plurality of UV lamps, disposed on both sides of the print head, and outputting curing energy to cure UV ink applied to the print object;
a UV lamp blocking device mounted on one side of the UV lamp module, having a blocking film filter movable in one direction, and selectively blocking the curing energy of the UV lamp by moving the blocking film filter to the lower end of the UV lamp module; and
Controlling the curing intensity according to the width of each of the plurality of passes of the ink module to uniformly output the overall UV energy of the UV lamp module, and selectively shifting the curing energy of the UV lamp module by moving the blocking film filter The curing system of a UV inkjet printer, characterized in that it comprises a control device for controlling the delay curing by controlling the curing intensity according to the blocking film filter by blocking.
The method according to claim 1,
The UV lamp blocking device,
a case detachable to the UV lamp module;
It is provided in plurality so as to have different widths of passes, and is provided to be replaceably mounted on the lower surface of the case for each output mode according to each pass and has a size to cover a part of the lower surface of the UV lamp module, horizontally or vertically the blocking film filter of an opaque material that is mounted on the case to be movable in the direction and is not diffusely reflected to selectively block the curing energy of the UV lamp module; and
Curing system of a UV inkjet printer comprising a driving unit for moving the blocking film filter in a horizontal or vertical direction to selectively block the UV lamp in response to a pass of the ink module under the control of the control device or manually .
3. The method according to claim 2,
The blocking filter is
It is divided into at least two regions having different transparency, and the regions selectively block the curing energy of the UV lamp in response to at least one pass of the ink module to transmit different curing energy to the applied UV ink. UV inkjet printer curing system, characterized in that.
4. The method according to claim 3,
The blocking filter is
A curing system for a UV inkjet printer, characterized in that curing time is delayed sequentially due to curing energy blocked by different transparency.
5. The method according to any one of claims 1 to 4,
The UV lamp blocking device,
The curing system of a UV inkjet printer, characterized in that it is installed on the side of the UV lamp module to move the blocking filter in the horizontal direction, or is installed at the rear of the UV lamp module to move the blocking filter in the vertical direction.

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