TW201604031A - Digital inkjet printing method capable of imparting transparent color to UV-curable transparent ink - Google Patents

Abstract

A digital inkjet printing method capable of imparting a transparent color to a UV-curable transparent ink includes: on multiple color ink inkjet heads and a transparent ink inkjet head, setting a first output area and a second output area, respectively; controlling at least one color ink inkjet head to output from the first output area a color ink corresponding to the first output area in a first printing stroke, and at the same time of the output, so as to form a pattern area; and at a partial position, where a transparent effect is to be formed, on the pattern area, simultaneously controlling at least one color ink inkjet head and the transparent ink inkjet head to simultaneously output from the second output area a color ink and a transparent ink corresponding to the second output area in a second printing stroke.

Description

Digital inkjet printing method capable of making UV curing transparent ink have transparent color

The invention relates to a digital inkjet printing method capable of transparently coloring a UV-curable transparent ink, thereby improving the added value and market competitiveness of the printed product.

Because UV inkjet printers can print on many different materials or thicknesses to be printed, in addition to providing faster printing speeds and achieving consistent and consistent print quality, the reliable performance is also Users can quickly print out the work and time of producing color separation screens, making UV inkjet printers widely used in professional commercial output applications such as advertising, posters and high-quality art reproduction.

In the UV inkjet printers currently seen on the market, there is mainly a controllable and reciprocating inkjet module on the sliding platform of the machine, and a plurality of ink cartridges are arranged above the inkjet module. Under the inkjet module, a plurality of inkjet heads corresponding to the respective ink cartridges are disposed, and the ink is printed on the to-be-printed object to be printed through the nozzle at the bottom of the inkjet head, and then the inkjet module is used. The UV lamp provided on the side is projected onto the ink that has been printed on the object to be printed, so that the ink hardens and solidifies quickly. When printing the to-be-printed material, the conventional printing is performed by one-way single printing or two-way two-way printing in each of the areas to be printed to shorten the printing time. If the surface of the print to be printed has a transparent effect after printing, it is usually printed. When a pattern of each area to be printed of the printed matter is to be printed, a layer of transparent ink is sprayed and the transparent ink sprayed on the area to be printed is immediately cured by the UV lamp to form on the pattern of the area to be printed. A transparent color layer causes the surface of the printed product to form a transparent color stereoscopic effect.

However, in the above manner, only the effect of forming a transparent color on a color pattern is achieved. Therefore, how to make the transparent ink exhibit a micro-color effect to improve the added value and market competitiveness of the printed product has been studied by the inventors. direction.

SUMMARY OF THE INVENTION The main object of the present invention is to provide a digital inkjet printing method which is simple in steps and which allows a UV-curable clear ink to have a transparent color.

In order to achieve the above object, the present invention provides a digital inkjet printing method capable of transparently coloring a UV-curable transparent ink, comprising the following steps: Step a: firstly, inkjet printing is performed on a plurality of color inks for outputting inks of different colors. n nozzles on the head, and n nozzles on the transparent ink jet head for outputting one of the transparent inks, respectively setting a first output area (1st to mth nozzle, m<n) and a second Output area (m+1th to nth nozzle); step b: controlling at least one color ink inkjet head on a first printing stroke, outputting its corresponding color ink from the first output area, and outputting simultaneously The UV curing module solidifies the ink and forms a pattern region; and the step c: controlling at least one of the color ink inkjet head and the transparent ink inkjet head at a portion of the pattern region where the transparent effect is to be formed, Simultaneously outputting the corresponding color ink and transparent ink from the second output area on a second printing stroke, the printing stroke can be repeated i times (i≧1), and in the i-1 printing output process, UV Curing module Open, most After the i-th output process, the UV curing module is turned on to cure the ink.

In the implementation, in the step c, the plurality of color ink inkjet heads and the transparent ink inkjet heads can be simultaneously controlled, and the corresponding color inks and transparent inks are simultaneously outputted from the second output region on a second printing stroke. Several times.

In implementation, the color density output by the second output region on the color ink jet head is less than the color density output by the first output region.

In order to further understand the present invention, the specific embodiments of the present invention and the effects achieved thereby are described in detail below with reference to the drawings and drawings.

Step a‧‧‧ firstly set a number of n nozzles on a plurality of color ink inkjet heads for outputting different color inks, and n nozzles on a transparent ink inkjet head for outputting a transparent ink An output area (1st to mth nozzles, m<n) and a second output area (m+1th to nth nozzles)

Step b‧‧‧ controlling at least one of the color ink inkjet heads on a first printing stroke, outputting the corresponding color ink from the first output area, and outputting the UV curing module to simultaneously cure the ink, and forming a Pattern area

Step c‧‧‧ at the same time in the position of the pattern area to form a transparent effect, simultaneously controlling at least one of the color ink head and the transparent ink head, simultaneously from the second output area on a second printing stroke Output the corresponding color ink and transparent ink, the printing stroke can be repeated i times (i≧1), and the UV curing module is not turned on during the i-1 printing output, and finally in the i-th output process Turn on UV curing module curing ink

1‧‧‧Color pattern area

2‧‧‧Colored transparent ink layer

Figure 1 is a flow chart of an embodiment of the present invention.

Figure 2 is a schematic view showing the state after the implementation of the embodiment of the present invention.

Please refer to FIG. 1 , which is an embodiment of a digital inkjet printing method capable of transparently coloring a UV-curable transparent ink according to the present invention. The method includes the following steps: Step a: firstly, a plurality of inks for outputting different colors n nozzles on the ink jet head of the color ink, and n nozzles on the transparent ink jet head for outputting one of the transparent inks, respectively, respectively setting a first output region (1st to mth nozzles, m<n) And a second output area (m+1 to nth nozzle); step b: controlling at least one of the color ink inkjet heads on a first printing stroke, and outputting the corresponding color ink from the first output area The output simultaneously activates the UV curing module to cure the ink and form a pattern area; Step c: simultaneously controlling at least one of the color ink inkjet head and the transparent ink inkjet head at a position of the pattern area to form a transparent effect, simultaneously outputting the same from the second output area on a second printing stroke Corresponding color ink and transparent ink, the printing stroke can be repeated i times (i≧1), and the UV curing module is not turned on during the i-1 printing output, and finally the UV is turned on during the i-th output. The curing module cures the ink.

Wherein, in the step c, the plurality of color ink inkjet heads and the transparent ink inkjet heads can be simultaneously controlled, and the corresponding color inks and transparent inks are simultaneously outputted from the second output region on a second printing stroke. The color density output by the second output area on the color ink head is smaller than the color density output by the first output area.

Therefore, as shown in FIG. 2, through the above steps, when the printing material advances on a first printing stroke, the color pattern area 1 formed by the corresponding color ink is output from the first output area, and is output. The UV curing module is turned on during the process to cure the ink. After the output of the first output area is completed, the printed material does not advance, but since the original step b forms the color pattern area 1 originally located in the first output area and has advanced to the second output area, it can be in the color pattern area 1 of the above step b. And at least one of the color ink inkjet head and the transparent ink inkjet head are controlled at a position of the transparent effect, and the corresponding color ink and the transparent ink are simultaneously outputted from the second output region on a second printing stroke, that is, A color transparent ink layer 2 can be formed on the color pattern area 1, and the printing stroke can be repeated i times (i≧1), and the UV curing module is not turned on during the i-th printing output. Finally, the UV curing module curing ink is turned on in the i-th output process.

The above is a specific embodiment of the present invention and the technical means employed, and many variations and modifications can be derived therefrom based on the disclosure or teachings herein. The role still does not exceed the realities covered by the specification and the drawings. The spirit of quality should be regarded as within the technical scope of the present invention.

In summary, according to the above disclosure, the present invention can achieve the intended purpose of the invention, and provides a digital inkjet printing method capable of transparently coloring a UV-curable transparent ink, which is highly valuable for industrial use. Submit an invention patent application according to law.

Step a‧‧‧ firstly set a number of n nozzles on a plurality of color ink inkjet heads for outputting different color inks, and n nozzles on a transparent ink inkjet head for outputting a transparent ink An output area (1st to mth nozzles, m<n) and a second output area (m+1th to nth nozzles)

Step b‧‧‧ controlling at least one of the color ink inkjet heads on a first printing stroke, outputting the corresponding color ink from the first output area, and outputting the UV curing module to simultaneously cure the ink, and forming a Pattern area

Step c‧‧‧ at the same time in the position of the pattern area to form a transparent effect, simultaneously controlling at least one of the color ink head and the transparent ink head, simultaneously from the second output area on a second printing stroke Output the corresponding color ink and transparent ink, the printing stroke can be repeated i times (i≧1), and the UV curing module is not turned on during the i-1 printing output, and finally in the i-th output process Turn on UV curing module curing ink

Claims (3)

A digital inkjet printing method capable of transparently coloring a UV-curable transparent ink, comprising the following steps: Step a: firstly, n nozzles on a plurality of color ink inkjet heads for outputting inks of different colors, and for outputting One of the transparent inks, the n nozzles on the transparent ink jet head, respectively set a first output area (first to mth nozzle, m<n) and a second output area (m+1 to nth) Step b: controlling at least one color ink inkjet head on a first printing stroke, outputting its corresponding color ink from the first output area, and outputting the UV curing module to cure the ink and forming a pattern area; and step c: controlling at least one of the color ink inkjet head and the transparent ink inkjet head at a position of the pattern area to form a transparent effect, simultaneously on the second printing stroke The two output areas output their corresponding color inks and transparent inks. The printing stroke can be repeated i times (i≧1), while the UV curing module is not turned on during the i-1 printing output, and finally the i-th time During output UV-curable inks start curing module. The digital inkjet printing method capable of transparently coloring a UV-curable transparent ink according to claim 1, wherein in the step c, a plurality of color ink inkjet heads and a transparent inkjet head can be simultaneously controlled. And simultaneously outputting the corresponding color ink and the transparent ink from the second output area on the second printing stroke. The digital inkjet printing method capable of providing a UV-curable transparent ink with a transparent color as described in claim 1, wherein the color density of the second output region on the color ink inkjet head is output It is smaller than the color density output by the first output area.