CN110722893A

CN110722893A - UV ink-jet printing method capable of enabling stack printing edge to have smooth effect

Info

Publication number: CN110722893A
Application number: CN201810777928.9A
Authority: CN
Inventors: 蔡振乾; 颜智华
Original assignee: XINGYUN COMPUTER CO Ltd
Current assignee: XINGYUN COMPUTER CO Ltd; Great Computer Corp
Priority date: 2018-07-16
Filing date: 2018-07-16
Publication date: 2020-01-24

Abstract

The invention discloses a UV ink-jet printing method capable of enabling the edge of stack printing to have a smooth effect, which is mainly characterized in that after an ink-jet head prints an image X on a substrate, the distance between the ink-jet head and the surface of the substrate is kept unchanged, and the image X is printed in a bidirectional way at least once; after the above steps are completed, the ink jet head prints an image X ' on the image X on the substrate, wherein the image X ' is a pixel of the image X which is expanded outwards, so that the image X ' can completely cover the image X, and the peripheral edge of the image X forms a smooth cambered surface.

Description

UV ink-jet printing method capable of enabling stack printing edge to have smooth effect

Technical Field

The invention relates to a UV ink-jet printing method capable of effectively generating a smooth edge effect of a printed finished product during a stack printing procedure.

Background

Since the UV ink jet can print on a plurality of objects to be printed with different materials or thicknesses, the UV ink jet can provide a faster printing speed, achieve stable and consistent printing quality, and save the work and time for manufacturing the color separation screen plate for users to quickly finish printing.

Compared with water-based, solvent-based and latex inks, UV curable inks have the characteristic of curing immediately after reaction and have a certain thickness after curing, so that UV inkjet is also often applied to printing products with overprint and stackable thickness and the like having an embossing effect or similar 3D printing, such as embossing, by utilizing the characteristic. In order to make the printed product show rich color gradation change, when the color separation software is used to perform color separation treatment, multiple printing strokes (multi-pass) are performed according to the size and resolution of the image file of the image to be printed, so that the ink jet head prints the data to be printed in multiple times and repeatedly jets ink and superimposes colors on the printed matter, thereby accumulating the ink dots printed in each printing stroke at the same ink jet position to present the effect of multi-stage printing.

However, the edges of the printed product produced by the general stack printing procedure are not smooth enough to meet some special requirements or applications. Since the existing printing technologies for UV 3D or relief printing in the market cannot avoid the above-mentioned printing defects caused by overprinting, there is still room for improvement in the printing technologies.

Disclosure of Invention

Therefore, how to effectively improve the printing defects generated by the UV inkjet printer during overprinting so as to further improve the printing quality of the UV inkjet is greatly desired by those skilled in the art and users.

The invention aims to provide a UV ink-jet printing method which can effectively generate the effect of printing the smooth edge of a finished product when a stack printing program is carried out.

In order to achieve the above object, the present invention provides a UV inkjet printing method capable of smoothing a stack printing edge, which mainly utilizes a UV printer having N inkjet heads to print a same image X on a substrate by M inkjet heads (where N ≧ M >1) simultaneously, and then makes I inkjet heads (where N ≧ I >1) at the same position on the substrate surface, and print K times of the image X (where K ≧ 1) bidirectionally under the condition that the distance between the inkjet heads and the substrate surface is kept unchanged; after the above steps are completed, J (where N > J ≧ 1) inkjet heads are made to print an image X ' on an image X at the same position on the substrate at the same distance from the surface of the substrate, where the image X ' is a similar image of Z pixels (where Z ≧ 1) out of the image X, so that the image X ' can be completely overlaid on the image X. After all the steps are finished, the edges of the periphery of the image X can naturally form a smooth cambered surface.

For further understanding of the present invention, the following detailed description of the preferred embodiments will be provided in conjunction with the drawings and figures to illustrate the specific components of the present invention and the functions performed thereby.

Drawings

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

FIG. 2 is a schematic diagram of a continuous operation state in an embodiment of the present invention.

Description of reference numerals: step a, printing an image X on a substrate by an ink jet head; b, keeping the distance between the ink jet head and the surface of the base material unchanged, and printing the image X in a bidirectional way at least once; c, after the step is finished, the ink jet head is made to print an image X' on the image X on the base material; 1-a substrate; 2-image X; 3-image X'.

Detailed Description

Please refer to fig. 1 and fig. 2, which illustrate a preferred embodiment of the present invention for a UV inkjet printing method capable of rounding the printing edge of a stack.

The invention provides a UV ink-jet printing method capable of enabling the edge of stack printing to have a smooth effect, which comprises the following steps:

step a: printing an image X (image X) on a substrate by the ink jet head;

step b: keeping the distance between the ink jet head and the surface of the base material unchanged, and printing the image X in a bidirectional way at least once; and

step c: after the above steps are completed, the inkjet head is made to print an image X '(image X') on the image X on the substrate.

Wherein, the ink jet head is a single or multiple output ink jet heads. The image X 'is the pixel of the image X which is expanded outward, so that the image X' can be completely covered on the image X, and the edge of the periphery of the image X forms a smooth cambered surface.

In practice, as shown in fig. 2, with a UV printer having N inkjet heads, when the substrate 1 is placed on the printing platform of the UV inkjet printer, M inkjet heads (N ≧ M >1) of the UV inkjet printer are enabled to simultaneously print the same image X2 on the substrate 1, I inkjet heads (N ≧ I >1) are enabled to be at the same position as the substrate 1, and K times (K ≧ 1) of the image X2 are bidirectionally printed on the substrate 1 under the condition that the distance between the inkjet heads and the surface of the substrate is kept constant, so that the image X2 on the substrate 1 is repeatedly stacked and hardened on the substrate 1, after the above steps are completed, J inkjet heads (N ≧ J1) are enabled to be printed on the image X2 at the same position on the substrate 1, and an image X '3 is printed, the image X' 3 is an external enlarged Z pixel of the image X2 (Z ≧ 1 is similar, it is possible to completely cover and round the peripheral edge of the image X2, making the peripheral edge of the image X2 naturally form a rounded arc.

Therefore, through the design, the edge of the image displayed after the base material is printed can form a smooth cambered surface, so that the product precision is improved and the touch feeling of a user is more comfortable after the base material is applied to 3D or relief printing and other special printing products.

While the invention has been described in connection with specific embodiments and implementations, many modifications and variations are possible in light of the above teaching or may be acquired from practice of the invention, and it is intended that all such modifications and variations be considered as within the spirit and scope of the invention.

Claims

1. A UV ink-jet printing method capable of enabling the edge of stack printing to have a smooth effect is characterized by comprising the following steps:

step a: printing an image X on a substrate by an ink jet head;

step c: after the above-mentioned step is completed, making the ink-jet head print an image X' on the image X on the above-mentioned base material;

the image X 'is a pixel extended from the image X, so that the image X' can be completely covered on the image X, and the edges of the periphery of the image X form a smooth cambered surface.

2. The UV inkjet printing method of claim 1 wherein the inkjet head is a single or multiple output inkjet head.

3. The method according to claim 1, wherein in step c, the distance between the printhead and the surface of the substrate is maintained as in step b.

4. The method of claim 1, wherein the image X' is a similar image of image X expanded by Z pixels), wherein Z ≧ 1.