JP2013119244A - Method for printing stereoscopic pattern by digital control system uv ink jet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for printing a stereoscopic pattern by digital control using, in particular, with the use of UV ink jet.SOLUTION: In the method for printing a stereoscopic pattern by a digital control system UV ink jet, the ink jet printer forms high and low undulations by discharging white ink while reciprocating laterally in a printing area for a work piece, and applies color by discharging color ink in the next printing section, thereby printing a stereoscopic pattern. When the ink jet printer is once actuated, it directly moves to the next printing section longitudinally without returning to the initial starting point and continues printing.

Description

The present invention relates to a method for printing a three-dimensional pattern, and more particularly to a method for printing a three-dimensional pattern by digital control using UV inkjet.

In the existing three-dimensional pattern printing method using ink jet, a three-dimensional pattern is formed by stacking UV curable inks. Specifically, the existing technology uses white ink printing members and color ink printing. The ink-jet printer is equipped with a member, and the white ink printing member is arranged in front of the color ink printing member. Each ink member has a plurality of ink heads and has a printing width (length in the front-rear direction). Are the same. The white ink printing member uses UV curable ink.

The printing step includes a white ink overcoating step and a color ink coloring step. In the white ink stacking step, first, the ink jet printer is moved above the workpiece in the main scanning direction ( That is, the width in which the white ink is ejected onto the workpiece by the white ink printing member while moving from one side to the other side in the horizontal direction), and then the inkjet printer can print in the sub-scanning direction (that is, the front-rear direction). Move the same distance as (the length in the front-rear direction for one print).

Thereafter, the white ink is ejected while moving the ink jet printer along the main scanning direction to the starting side, and the ink jet printer is moved again by the same distance in the sub scanning direction. According to this method, the inkjet printer continues to operate as described above and prints to the back of the work piece. At this time, when the ink jet printer moves to the back of the work piece, the position returns to the initial starting point. The above-described white ink overcoating operation is repeated many times, so that a three-dimensional pattern in an uneven state can be printed.

When the last white ink overcoating operation is performed, the inkjet printer returns to the initial starting point, adjusts the position, and again discharges white ink while moving along the same route. A color ink printing member arranged on the back side of the white ink printing member after forming a three-dimensional pattern in an uneven state is formed in the white ink area (the area where the white ink overcoating is completed) finished by the overcoating operation. Color ink is ejected and colored to complete the printing of the three-dimensional pattern.

Further, in the color ink coloring step, while the ink jet printer is moving in the first main scanning direction (first area), the color ink printing member has not reached the position corresponding to the workpiece. While the color ink is not ejected, and the white ink printing member is no longer corresponding to the workpiece while being moved in the last main scanning direction, the white ink is not ejected. .

Taiwan Patent Notice I317700

However, the existing three-dimensional pattern printing method has the following problems.
1. Ink jet printers, which are existing technologies, take a considerable amount of time because the white ink is repeatedly applied by repeating the same route from the starting point to the ending point of the workpiece many times.
2. When the ink jet printer returns to the initial starting point, adjusting the position without fail may cause a position error every time, which may adversely affect the quality of the product.
3. Depending on the number of times the white ink printing member is printed, the height difference of the three-dimensional pattern of the workpiece varies, and the number of times the inkjet printer returns to the initial starting point also varies. Then, as the height difference of the three-dimensional pattern of the workpiece increases, there is a problem that the number of times the ink jet printer returns to the initial starting point increases and it takes time to work.

A method of printing a stereoscopic image with a digitally controlled UV inkjet according to the present invention includes a white ink printing member and a color ink printing member each having a plurality of spray nozzles, and the white ink printing member is more than the color ink printing member. A preparation step of preparing an inkjet printer installed on the front side and a workpiece positioned below the inkjet printer;
When the inkjet printer moves laterally from one side of the workpiece to the other side is calculated as one time, the inkjet printer is reciprocated several times in the printing area of the workpiece, and the white ink is A three-dimensional step of forming a high and low undulation by discharging white ink onto a workpiece by a printing member;
A longitudinal movement step in which the inkjet printer moves longitudinally in one print area relative to the workpiece;
At this time, the three-dimensionalization step and the vertical movement step are alternately performed until the discharge range of the color ink printing member corresponds to the printing area of the workpiece,
When the inkjet printer moves laterally from one side of the workpiece to the other side is calculated as one time, the inkjet printer is reciprocated several times in the printing area of the workpiece, and the white ink printing is performed during the movement. The ink is ejected to two adjacent print areas of the workpiece by the member and the color ink printing member, and the high and low undulations are formed in the printing area by the white ink printing member, and the printing is performed by the color ink printing member. A coloring and three-dimensional step of coloring the printed area one area ahead;
A longitudinal movement step in which the inkjet printer moves longitudinally in one print area relative to the workpiece;
At this time, the coloring and three-dimensionalization step and the vertical movement step are alternately performed until the discharge range of the white ink printing member does not correspond to the printing area of the workpiece,
A coloring step of causing the ink jet printer to move laterally to a printing area of a workpiece and, when moving, to color the printing area by discharging the color ink by the color ink printing member;
A longitudinal movement step in which the inkjet printer moves vertically in one printing area;
At this time, the coloring step and the vertical movement step are alternately performed until the color is applied to all the print areas of the workpiece,
A method comprising completing a printing operation by sequentially performing the steps.

The distance in the front-rear direction of the discharge range of the white ink printing member and the color ink printing member in the inkjet printer is the same.

The inkjet printer includes a plurality of print heads arranged along the left-right direction, and each of the print heads includes a plurality of spray nozzles arranged along the front-rear direction. And at least one of the print heads is filled with white ink, and the other print heads are filled with color ink, and the front ink is filled with white ink. A print head having a partial ink discharge portion is defined as a white ink print member, and a print head having the rear ink discharge portion filled with color ink is defined as a color ink print member.

In the coloring and three-dimensionalization step, the color ink is ejected from the color ink printing member while the ink jet printer moves laterally in the printing area. At this time, the ejection amount of the color ink is controlled by the computer control. In such a manner, it is colored at an appropriate concentration by being discharged once at a time.

In the vertical movement step, the vertical movement distance of the inkjet printer each time is the same as the distance in the front-rear direction of the discharge range of the color ink printing member.

The method of printing a three-dimensional pattern with the digitally controlled UV inkjet according to the present invention can achieve the following effects.
1. Since the inkjet printer can continue to print by moving from the first printing area to the eighth printing area on the work piece and can complete the printing at once, the working time of the present invention can be saved over the conventional product.
2. Once the ink jet printer according to the present invention is activated, it does not return to the initial starting point, so that it is not necessary to adjust the position every time.
3. Since the present invention forms high and low undulations of the three-dimensional pattern according to the number of times the inkjet printer moves in the printing area of the workpiece, the present invention can save work time compared with the conventional technique, as compared with the conventional technique. Printing efficiency can be increased.

It is a bottom view of the ink jet printer concerning the present invention. It is explanatory drawing of the 1st operation | movement in the method of printing a three-dimensional pattern with the digitally controlled UV inkjet which concerns on this invention. It is explanatory drawing of the 2nd operation | movement in the method of printing a three-dimensional pattern with the digitally controlled UV inkjet which concerns on this invention. It is explanatory drawing of the 3rd operation | movement in the method of printing a three-dimensional pattern with the digitally controlled UV inkjet which concerns on this invention. It is explanatory drawing which shows the state which coats ink by the 1st operation | movement in the method of printing a three-dimensional pattern with the digitally controlled UV inkjet which concerns on this invention. It is explanatory drawing which shows the state which repeats the ink by the 2nd operation | movement in the method of printing a three-dimensional pattern with the digitally controlled UV inkjet which concerns on this invention. It is explanatory drawing which shows the state which repeats the ink by the 3rd operation | movement in the method of printing a three-dimensional pattern with the digital control type UV inkjet which concerns on this invention.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described in detail with reference to the accompanying drawings. The method for printing a three-dimensional pattern with a digitally controlled UV inkjet according to the present invention includes the following processes.

Previous work:
(1) Use a scanner.
a. A 2D image of the workpiece is scanned to obtain a high-resolution color image and stored in a file.
b. The 3D surface shape of the workpiece is scanned to obtain a 3D stereoscopic image and stored in a file.
(2) Image processing is performed using Adobe Photoshop or Adobe Illustrator.
a. The color image is created by adjusting the color and effect of the high-resolution color image with image processing software.
b. The color image and the 3D stereoscopic image are stored in the tiff format.
(3) Select the material of the workpiece.
a. Preferred materials: Non-absorbing or low-absorbing materials such as MDF, PVC, PC, PMMA, tile, aluminum plastic, aluminum, metal, glass.
b. Unfavorable material: a material having high water absorption, such as cloth, silk, carpet and the like.
(4) Input an image.
Input the created image file into the printing facility.
After the above preparation is completed, the process proceeds to the next step.

The step of printing a three-dimensional pattern will be described with reference to FIG.

First, in the preparation step, an ink jet printer 10 and a workpiece positioned below the ink jet printer 10 are prepared, and the ink jet printer 10 is arranged along the left-right direction, and is elongated. The print heads 11 each have a shape, and each of the print heads 11 includes a plurality of spray nozzles 110 arranged along the front-rear direction, and the plurality of spray nozzles 110 are moved back and forth in the center by computer program control. The front ink discharge part 111 and the rear ink discharge part 112 are configured in half.

Among the plurality of print heads 11, at least one print head 11 is filled with white ink, and the other print heads 11 are filled with color ink, respectively. At this time, the print head 11 containing white ink in the front ink discharge unit 111 is used as the white ink print member 12, and the print head 11 containing color ink in the rear ink discharge unit 112 is used as the color ink print member 13. .

As shown in FIG. 1, the ink jet printer in this embodiment has eight print heads 11, of which the front ink discharge portions 111 of the two rightmost print heads 11 are filled with white ink. At the same time, the rear ink discharge unit 112 of the other print heads 11 is filled with color ink, and the print heads 11 filled with the color inks are Lm (Light magenta, light magenta) in order from right to left. Lc (Light cyan, light blue green), Y (Yellow, yellow), M (Magenta, reddish purple), C (Cyan, blue green), K (Black, black) are arranged.

As shown in FIG. 2, the printed portion of the workpiece 50 is divided into a plurality of equal print areas from a front part to a rear part by a personal computer in order into a first print area 51, a second print area 52,. The distance between the areas is the same as the front-rear distance of the discharge range of the white ink printing member 12 and the color ink printing member 13, and the inkjet printer 10 has the white ink printing member 12 of the workpiece 50. It is located on one side above the workpiece 50 so as to correspond to one printing area 51. Note that the workpiece 50 in this embodiment is divided into eight printing areas from the first printing area 51 to the eighth printing area 58 in order.

In the three-dimensionalization step, as shown in FIGS. 2 and 5, when the inkjet printer 10 is moved laterally from one side of the workpiece 50 to the other side, the calculation is performed once. A shape having high and low undulations in the first print area 51 by discharging white ink from the white ink printing member 12 to the first print area 51 of the work piece 50 by reciprocating a plurality of times in the print area of the work piece 50. Form.

Subsequently, in the vertical movement step, as shown in FIGS. 3 and 6, the white ink printing member 12 is moved by moving the inkjet printer 10 in the vertical direction in one printing area with respect to the workpiece 50. The color ink printing member 13 is made to correspond to the first printing area 51 of the work piece 50 and the color ink printing member 13 is made to correspond to the second printing area 52 of the work piece 50. Since it starts corresponding from the 1st printing area 51, the process decided sequentially can be performed.

Subsequently, in the coloring and three-dimensionalization step, calculation is performed once when the inkjet printer 10 is moved laterally from one side of the workpiece 50 to the other side. The ink is reciprocated a plurality of times in the printing area, and white ink is ejected to the second printing area 52 of the workpiece 50 by the white ink printing member 12 to print a three-dimensional pattern having high and low undulations. Ink is applied to the first print area 51 of the workpiece 50 to color it. In this step, when the first printing area 51 is colored by the color ink printing member 13, printing in the first printing area 51 is completed.

In the next vertical movement step, as shown in FIGS. 4 and 7, the white ink printing member 12 is covered by moving the inkjet printer 10 in the wrinkle direction in one printing area with respect to the workpiece 50. The color ink printing member is made to correspond to the second printing area 52 of the work piece 50 while being made to correspond to the third printing area 53 of the work piece 50.

In the next coloring and three-dimensionalization step, it is calculated as one time when the inkjet printer 10 is moved from one side of the workpiece 50 to the other side, and the inkjet printer 10 is moved a plurality of times in the printing area of the workpiece 50. The reciprocating movement is performed, and the white ink is ejected by the white ink printing member 12 to the third printing area 53 of the workpiece 50 to print a three-dimensional pattern having high and low undulations, and the color ink is printed by the color ink printing member 13. The 50 second print areas 52 are ejected and colored. In this step, when the second printing area 52 is colored by the color ink printing member 13, printing in the second printing area 52 is completed.

As shown in FIG. 1, the inkjet printer 10 continues until the white ink printing member 12 no longer corresponds to the printing area of the workpiece 50 (ie, the white ink printing member 12 is the last printing area of the workpiece 50). The above-described coloring and three-dimensional steps and the longitudinal movement step are alternately performed. That is, the inkjet printer 10 sequentially moves in the vertical direction in the printing area from the first printing area 51 to the eighth printing area 58 so that the white ink printing member 12 moves away from the eighth printing area 58 and the color ink printing member 13. Just corresponds to the eighth print area 58 of the media 50, it proceeds to the next step.

In the next coloring step, it is calculated as one time when the inkjet printer 10 is moved from one side of the workpiece 50 to the other side, and the inkjet printer 10 is reciprocated a plurality of times in the printing area of the workpiece 50. At this time, the discharge operation of the white ink printing member 12 is stopped and the color ink printing member 13 discharges the color ink to the eighth printing area 58 of the workpiece 50 to add a color. All printing operations on the workpiece 50 are completed.

According to this method, in the coloring and three-dimensional step, and the coloring step, the color ink is ejected by the color ink printing member 13 while the inkjet printer 10 is moved laterally in the printing area, and also by computer control. The color ink can be colored with an appropriate density by ejecting the color ink evenly once so as to correspond to the number of movements.

In another embodiment, an appropriate amount of color ink may be ejected when the color ink printing member 13 moves last in the printing area. That is, in the coloring step, the ink jet printer 10 moves laterally only once in each printing area, and the color ink printing member 13 discharges the color ink and performs printing by the single movement.

Furthermore, when each spray nozzle 110 ejects ink, the portion to which the ink has adhered is irradiated and cured by an illumination tool such as a UV lamp. This technical means is well known to those skilled in the art and will not be described in detail here.

In any step, when the ink jet printer 10 moves in the horizontal direction in the printing area, it is calculated as one time when the ink jet printer 10 is moved in the horizontal direction from one side to the other side. Therefore, when the inkjet printer 10 is moved evenly in the printing area, the inkjet printer 10 moves vertically from the starting side. On the other hand, when the inkjet printer 10 moves oddly, the inkjet printer 10 moves vertically to the opposite side. . As shown in FIGS. 2 to 4, the inkjet printer 10 in this embodiment starts moving from the right side of the drawing, so that the right side is the starting side and the left side is the opposite side. In another embodiment of the present invention, the starting side may be either the right side or the left side.

In the method of printing a three-dimensional pattern with the digitally controlled UV ink jet in the present invention, the print area is printed by the white ink printing member 12 by reciprocating the ink jet printer 10 a plurality of times in each print area of the workpiece 50 in the horizontal direction. When the white ink is discharged to form a shape having high and low undulations, and the color ink is ejected to the next printing area by the color ink printing member 13, the printing of the printing area is completed. As described above, in the present invention, when printing in each printing area is completed, the inkjet printer 10 moves in the printing area and performs printing in the next printing area.

According to this method, the ink jet printer 10 performs printing in order from the first print area to the last print area on the work piece 50, and when the printing of one print area is completed, the ink jet printer 10 performs the initial departure. Since it does not return to the point but moves directly to the next printing area and continues printing, printing can be completed in a short time.
The method of printing a three-dimensional pattern with the digitally controlled UV ink jet according to the present invention has the following effects.
1. Since the inkjet printer 10 moves in order from the first printing area 51 to the eighth printing area 58 on the workpiece 50 and continues printing, printing can be completed in a short time.
2. Since the ink jet printer 10 according to the present invention once operates, it does not return to the initial starting point, so that it is not necessary to adjust the position every time.
3. In the present invention, a shape having a three-dimensional pattern of high and low undulations is formed according to the number of times the inkjet printer 10 moves in the printing area of the work piece 50, so that the work time can be saved by the conventional technique and the printing efficiency can be improved. Can be increased.

Further, in the present invention, when the inkjet printer 10 reciprocates in the printing area of the workpiece 50 and discharges white ink, it is possible to form an intense difference in three-dimensional pattern in a short time. Since the printer 10 does not adjust the position, the color ink printing member 13 can accurately discharge the color ink onto the work piece 50 to perform printing, so that the work piece 50 has a wood grain pattern or an oil painting. A three-dimensional pattern having a concavo-convex shape such as can be expressed.

In another embodiment, the plurality of spray nozzles 110 in each print head 11 are not divided into the front ink discharge unit 111 and the rear ink discharge unit 112, and ink is applied to all the spray nozzles 110 of each print head 11. May be filled. In this case, it is necessary to install the spray nozzle 110 filled with white ink in front of the spray nozzle 110 filled with color ink.

In still another embodiment, the distance in the front-rear direction of the discharge range of the white ink printing member 12 and the color ink printing member 13 may not be set to be the same. For example, if the distance in the front-rear direction of the discharge range of the white ink printing member 12 and the color ink printing member 13 is set at a ratio of three to one, the vertical movement distance of the inkjet printer 10 each time when performing the vertical movement step is Since the discharge range of the color ink printing member 13 is the same as the distance in the front-rear direction, the white ink printing member 12 reciprocates in the horizontal direction in each printing area of the workpiece 50 to discharge white ink. Perform three times (because the white ink printing member 12 is divided into three equal parts, printing is performed three times in each printing area during vertical movement). Further, when the white ink printing member 12 moves laterally to the printing area of the workpiece 50, it can be reciprocated a plurality of times to form a shape having a high and low undulation of the three-dimensional pattern.

Furthermore, in another embodiment, in the moving step, the moving distance of each time the inkjet printer 10 may be set smaller than the distance in the front-rear direction of the printing area of the white ink printing member 12 and the color ink printing member 13. In this way, the white ink is reciprocated in the horizontal direction in each printing area of the workpiece 50 by moving the white ink printing member 12 and the color ink printing member 13 in any one printing area of the workpiece 50. By discharging, the printing process can be performed a plurality of times. Therefore, if the white ink printing member 12 and the color ink printing member 13 are reciprocated a plurality of times in the horizontal direction in the printing area of the workpiece 50, a shape having a high and low undulation in a three-dimensional pattern can be formed.

In the embodiment of the present invention, the inkjet printer 10 moves in the front-rear direction with respect to the workpiece 50. However, in other embodiments, the inkjet printer 10 moves in the front-rear direction with respect to the workpiece 50. You can move.

As described above, the method of printing a three-dimensional pattern with the digitally controlled UV ink jet according to the present invention can save work time because the ink jet printer sequentially moves and prints the print area of the workpiece. By moving the print area of the workpiece a plurality of times without returning to the initial starting point, the ink jet printer forms a shape having high and low undulations of the three-dimensional pattern, so that the printing efficiency can be improved.

DESCRIPTION OF SYMBOLS 10 Inkjet printer 11 Print head 110 Spray nozzle 111 Front ink discharge part 112 Rear ink discharge part 12 White ink printing member 13 Color ink printing member 50 Work piece 51 First printing area 52 Second printing area 53 Third printing area 54 Fourth printing zone 55 Fifth printing zone 56 Sixth printing zone 57 Seventh printing zone 58 Eighth printing zone

The present invention relates to a method for printing a three-dimensional pattern, and more particularly to a method for printing a three-dimensional pattern by digital control using UV inkjet.

In the existing three-dimensional pattern printing method using ink jet, a three-dimensional pattern is formed by stacking UV curable inks. Specifically, the existing technology uses white ink printing members and color ink printing. The ink-jet printer is equipped with a member, and the white ink printing member is arranged in front of the color ink printing member. Each ink member has a plurality of ink heads and has a printing width (length in the front-rear direction). Are the same. The white ink printing member uses UV curable ink.

The printing step includes a white ink overcoating step and a color ink coloring step. In the white ink stacking step, first, the ink jet printer is moved above the workpiece in the main scanning direction ( That is, the width in which the white ink is ejected onto the workpiece by the white ink printing member while moving from one side to the other side in the horizontal direction), and then the inkjet printer can print in the sub-scanning direction (that is, the front-rear direction). Move the same distance as (the length in the front-rear direction for one print).

Thereafter, the white ink is ejected while moving the ink jet printer along the main scanning direction to the starting side, and the ink jet printer is moved again by the same distance in the sub scanning direction. According to this method, the inkjet printer continues to operate as described above and prints to the back of the work piece. At this time, when the ink jet printer moves to the back of the work piece, the position returns to the initial starting point. The above-described white ink overcoating operation is repeated many times, so that a three-dimensional pattern in an uneven state can be printed.

When the last white ink overcoating operation is performed, the inkjet printer returns to the initial starting point, adjusts the position, and again discharges white ink while moving along the same route. A color ink printing member arranged on the back side of the white ink printing member after forming a three-dimensional pattern in an uneven state is formed in the white ink area (the area where the white ink overcoating is completed) finished by the overcoating operation. Color ink is ejected and colored to complete the printing of the three-dimensional pattern.

Further, in the color ink coloring step, while the ink jet printer is moving in the first main scanning direction (first area), the color ink printing member has not reached the position corresponding to the workpiece. While the color ink is not ejected, and the white ink printing member is no longer corresponding to the workpiece while being moved in the last main scanning direction, the white ink is not ejected. .

Taiwan Patent Notice I317700

However, the existing three-dimensional pattern printing method has the following problems.
1. Ink jet printers, which are existing technologies, take a considerable amount of time because the white ink is repeatedly applied by repeating the same route from the starting point to the ending point of the workpiece many times.
2. When the ink jet printer returns to the initial starting point, adjusting the position without fail may cause a position error every time, which may adversely affect the quality of the product.
3. Depending on the number of times the white ink printing member is printed, the height difference of the three-dimensional pattern of the workpiece varies, and the number of times the inkjet printer returns to the initial starting point also varies. Then, as the height difference of the three-dimensional pattern of the workpiece increases, there is a problem that the number of times the ink jet printer returns to the initial starting point increases and it takes time to work.

A method of printing a stereoscopic image with a digitally controlled UV inkjet according to the present invention includes a white ink printing member and a color ink printing member each having a plurality of spray nozzles, and the white ink printing member is more than the color ink printing member. A plurality of print heads arranged in the left-right direction so as to be installed on the front side , each of the print heads having a plurality of spray nozzles arranged in the front-rear direction, the plurality of spray nozzles Is configured by a computer program control to constitute a front ink discharge portion and a rear ink discharge portion, and at least one print head is filled with white ink, and the other print heads are filled with color ink, A print head having the front ink discharge portion filled with white ink is And click printing member, a preparation step of preparing an ink jet printer for the print head having a rear portion ink discharge portion filled with the color ink and the color ink printing member and a workpiece located below the ink-jet printer,
When the inkjet printer moves laterally from one side of the workpiece to the other side is calculated as one time, the inkjet printer is reciprocated several times in the printing area of the workpiece, and the white ink is A three-dimensional step of forming a high and low undulation by discharging white ink onto a workpiece by a printing member;
A longitudinal movement step in which the inkjet printer moves longitudinally in one print area relative to the workpiece;
At this time, the three-dimensionalization step and the vertical movement step are alternately performed until the discharge range of the color ink printing member corresponds to the printing area of the workpiece,
When the inkjet printer moves laterally from one side of the workpiece to the other side is calculated as one time, the inkjet printer is reciprocated several times in the printing area of the workpiece, and the white ink printing is performed during the movement. The ink is ejected to two adjacent print areas of the workpiece by the member and the color ink printing member, and the high and low undulations are formed in the printing area by the white ink printing member, and the printing is performed by the color ink printing member. A coloring and three-dimensional step of coloring the printed area one area ahead;
A longitudinal movement step in which the inkjet printer moves longitudinally in one print area relative to the workpiece;
At this time, the coloring and three-dimensionalization step and the vertical movement step are alternately performed until the discharge range of the white ink printing member does not correspond to the printing area of the workpiece,
A coloring step of causing the ink jet printer to move laterally to a printing area of a workpiece and, when moving, to color the printing area by discharging the color ink by the color ink printing member;
A longitudinal movement step in which the inkjet printer moves vertically in one printing area;
At this time, the coloring step and the vertical movement step are alternately performed until the color is applied to all the print areas of the workpiece,
A method comprising completing a printing operation by sequentially performing the steps.

The distance in the front-rear direction of the discharge range of the white ink printing member and the color ink printing member in the inkjet printer is the same.

In the coloring and three-dimensionalization step, the color ink is ejected from the color ink printing member while the ink jet printer moves laterally in the printing area. At this time, the ejection amount of the color ink corresponds to the number of movements by computer control. In such a manner, it is colored at an appropriate concentration by being discharged once at a time.

In the vertical movement step, the vertical movement distance of the inkjet printer each time is the same as the distance in the front-rear direction of the discharge range of the color ink printing member.

The method of printing a three-dimensional pattern with the digitally controlled UV inkjet according to the present invention can achieve the following effects.
1. Since the inkjet printer can continue to print by moving from the first printing area to the eighth printing area on the work piece and can complete the printing at once, the working time of the present invention can be saved over the conventional product.
2. Once the ink jet printer according to the present invention is activated, it does not return to the initial starting point, so that it is not necessary to adjust the position every time.
3. Since the present invention forms high and low undulations of the three-dimensional pattern according to the number of times the inkjet printer moves in the printing area of the workpiece, the present invention can save work time compared with the conventional technique, as compared with the conventional technique. Printing efficiency can be increased.

It is a bottom view of the ink jet printer concerning the present invention. It is explanatory drawing of the 1st operation | movement in the method of printing a three-dimensional pattern with the digitally controlled UV inkjet which concerns on this invention. It is explanatory drawing of the 2nd operation | movement in the method of printing a three-dimensional pattern with the digitally controlled UV inkjet which concerns on this invention. It is explanatory drawing of the 3rd operation | movement in the method of printing a three-dimensional pattern with the digitally controlled UV inkjet which concerns on this invention. It is explanatory drawing which shows the state which coats ink by the 1st operation | movement in the method of printing a three-dimensional pattern with the digitally controlled UV inkjet which concerns on this invention. It is explanatory drawing which shows the state which repeats the ink by the 2nd operation | movement in the method of printing a three-dimensional pattern with the digitally controlled UV inkjet which concerns on this invention. It is explanatory drawing which shows the state which repeats the ink by the 3rd operation | movement in the method of printing a three-dimensional pattern with the digital control type UV inkjet which concerns on this invention.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described in detail with reference to the accompanying drawings. The method for printing a three-dimensional pattern with a digitally controlled UV inkjet according to the present invention includes the following processes.

Previous work:
(1) Use a scanner.
a. A 2D image of the workpiece is scanned to obtain a high-resolution color image and stored in a file.
b. The 3D surface shape of the workpiece is scanned to obtain a 3D stereoscopic image and stored in a file.
(2) Image processing is performed using Adobe Photoshop or Adobe Illustrator.
a. The color image is created by adjusting the color and effect of the high-resolution color image with image processing software.
b. The color image and the 3D stereoscopic image are stored in the tiff format.
(3) Select the material of the workpiece.
a. Preferred materials: Non-absorbing or low-absorbing materials such as MDF, PVC, PC, PMMA, tile, aluminum plastic, aluminum, metal, glass.
b. Unfavorable material: a material having high water absorption, such as cloth, silk, carpet and the like.
(4) Input an image.
Input the created image file into the printing facility.
After the above preparation is completed, the process proceeds to the next step.

The step of printing a three-dimensional pattern will be described with reference to FIG.

First, in the preparation step, an ink jet printer 10 and a workpiece positioned below the ink jet printer 10 are prepared, and the ink jet printer 10 is arranged along the left-right direction, and is elongated. The print heads 11 each have a shape, and each of the print heads 11 includes a plurality of spray nozzles 110 arranged along the front-rear direction, and the plurality of spray nozzles 110 are moved back and forth in the center by computer program control. The front ink discharge part 111 and the rear ink discharge part 112 are configured in half.

Among the plurality of print heads 11, at least one print head 11 is filled with white ink, and the other print heads 11 are filled with color ink, respectively. At this time, the print head 11 containing white ink in the front ink discharge unit 111 is used as the white ink print member 12, and the print head 11 containing color ink in the rear ink discharge unit 112 is used as the color ink print member 13. .

As shown in FIG. 1, the ink jet printer in this embodiment has eight print heads 11, of which the front ink discharge portions 111 of the two rightmost print heads 11 are filled with white ink. At the same time, the rear ink discharge unit 112 of the other print heads 11 is filled with color ink, and the print heads 11 filled with the color inks are Lm (Light magenta, light magenta) in order from right to left. Lc (Light cyan, light blue green), Y (Yellow, yellow), M (Magenta, reddish purple), C (Cyan, blue green), K (Black, black) are arranged.

As shown in FIG. 2, the printed portion of the workpiece 50 is divided into a plurality of equal print areas from a front part to a rear part by a personal computer in order into a first print area 51, a second print area 52,. The distance between the areas is the same as the front-rear distance of the discharge range of the white ink printing member 12 and the color ink printing member 13, and the inkjet printer 10 has the white ink printing member 12 of the workpiece 50. It is located on one side above the workpiece 50 so as to correspond to one printing area 51. Note that the workpiece 50 in this embodiment is divided into eight printing areas from the first printing area 51 to the eighth printing area 58 in order.

In the three-dimensionalization step, as shown in FIGS. 2 and 5, when the inkjet printer 10 is moved laterally from one side of the workpiece 50 to the other side, the calculation is performed once. A shape having high and low undulations in the first print area 51 by discharging white ink from the white ink printing member 12 to the first print area 51 of the work piece 50 by reciprocating a plurality of times in the print area of the work piece 50. Form.

Subsequently, in the vertical movement step, as shown in FIGS. 3 and 6, the white ink printing member 12 is moved by moving the inkjet printer 10 in the vertical direction in one printing area with respect to the workpiece 50. The color ink printing member 13 is made to correspond to the first printing area 51 of the work piece 50 and the color ink printing member 13 is made to correspond to the second printing area 52 of the work piece 50. Since it starts corresponding from the 1st printing area 51, the process decided sequentially can be performed.

Subsequently, in the coloring and three-dimensionalization step, calculation is performed once when the inkjet printer 10 is moved laterally from one side of the workpiece 50 to the other side. The ink is reciprocated a plurality of times in the printing area, and white ink is ejected to the second printing area 52 of the workpiece 50 by the white ink printing member 12 to print a three-dimensional pattern having high and low undulations. Ink is applied to the first print area 51 of the workpiece 50 to color it. In this step, when the first printing area 51 is colored by the color ink printing member 13, printing in the first printing area 51 is completed.

In the next vertical movement step, as shown in FIGS. 4 and 7, the white ink printing member 12 is covered by moving the inkjet printer 10 in the wrinkle direction in one printing area with respect to the workpiece 50. The color ink printing member is made to correspond to the second printing area 52 of the work piece 50 while being made to correspond to the third printing area 53 of the work piece 50.

In the next coloring and three-dimensionalization step, it is calculated as one time when the inkjet printer 10 is moved from one side of the workpiece 50 to the other side, and the inkjet printer 10 is moved a plurality of times in the printing area of the workpiece 50. The reciprocating movement is performed, and the white ink is ejected by the white ink printing member 12 to the third printing area 53 of the workpiece 50 to print a three-dimensional pattern having high and low undulations, and the color ink is printed by the color ink printing member 13. The 50 second print areas 52 are ejected and colored. In this step, when the second printing area 52 is colored by the color ink printing member 13, printing in the second printing area 52 is completed.

As shown in FIG. 1, the inkjet printer 10 continues until the white ink printing member 12 no longer corresponds to the printing area of the workpiece 50 (ie, the white ink printing member 12 is the last printing area of the workpiece 50). The above-described coloring and three-dimensional steps and the longitudinal movement step are alternately performed. That is, the inkjet printer 10 sequentially moves in the vertical direction in the printing area from the first printing area 51 to the eighth printing area 58 so that the white ink printing member 12 moves away from the eighth printing area 58 and the color ink printing member 13. Just corresponds to the eighth print area 58 of the media 50, it proceeds to the next step.

In the next coloring step, it is calculated as one time when the inkjet printer 10 is moved from one side of the workpiece 50 to the other side, and the inkjet printer 10 is reciprocated a plurality of times in the printing area of the workpiece 50. At this time, the discharge operation of the white ink printing member 12 is stopped and the color ink printing member 13 discharges the color ink to the eighth printing area 58 of the workpiece 50 to add a color. All printing operations on the workpiece 50 are completed.

According to this method, in the coloring and three-dimensional step, and the coloring step, the color ink is ejected by the color ink printing member 13 while the inkjet printer 10 is moved laterally in the printing area, and also by computer control. The color ink can be colored with an appropriate density by ejecting the color ink evenly once so as to correspond to the number of movements.

In another embodiment, an appropriate amount of color ink may be ejected when the color ink printing member 13 moves last in the printing area. That is, in the coloring step, the ink jet printer 10 moves laterally only once in each printing area, and the color ink printing member 13 discharges the color ink and performs printing by the single movement.

Furthermore, when each spray nozzle 110 ejects ink, the portion to which the ink has adhered is irradiated and cured by an illumination tool such as a UV lamp. This technical means is well known to those skilled in the art and will not be described in detail here.

In any step, when the ink jet printer 10 moves in the horizontal direction in the printing area, it is calculated as one time when the ink jet printer 10 is moved in the horizontal direction from one side to the other side. Therefore, when the inkjet printer 10 is moved evenly in the printing area, the inkjet printer 10 moves vertically from the starting side. On the other hand, when the inkjet printer 10 moves oddly, the inkjet printer 10 moves vertically to the opposite side. . As shown in FIGS. 2 to 4, the inkjet printer 10 in this embodiment starts moving from the right side of the drawing, so that the right side is the starting side and the left side is the opposite side. In another embodiment of the present invention, the starting side may be either the right side or the left side.

In the method of printing a three-dimensional pattern with the digitally controlled UV ink jet in the present invention, the print area is printed by the white ink printing member 12 by reciprocating the ink jet printer 10 a plurality of times in each print area of the workpiece 50 in the horizontal direction. When the white ink is discharged to form a shape having high and low undulations, and the color ink is ejected to the next printing area by the color ink printing member 13, the printing of the printing area is completed. As described above, in the present invention, when printing in each printing area is completed, the inkjet printer 10 moves in the printing area and performs printing in the next printing area.

According to this method, the ink jet printer 10 performs printing in order from the first print area to the last print area on the work piece 50, and when the printing of one print area is completed, the ink jet printer 10 performs the initial departure. Since it does not return to the point but moves directly to the next printing area and continues printing, printing can be completed in a short time.
The method of printing a three-dimensional pattern with the digitally controlled UV ink jet according to the present invention has the following effects.
1. Since the inkjet printer 10 moves in order from the first printing area 51 to the eighth printing area 58 on the workpiece 50 and continues printing, printing can be completed in a short time.
2. Since the ink jet printer 10 according to the present invention once operates, it does not return to the initial starting point, so that it is not necessary to adjust the position every time.
3. In the present invention, a shape having a three-dimensional pattern of high and low undulations is formed according to the number of times the inkjet printer 10 moves in the printing area of the work piece 50, so that the work time can be saved by the conventional technique and the printing efficiency can be improved. Can be increased.

Further, in the present invention, when the inkjet printer 10 reciprocates in the printing area of the workpiece 50 and discharges white ink, it is possible to form an intense difference in three-dimensional pattern in a short time. Since the printer 10 does not adjust the position, the color ink printing member 13 can accurately discharge the color ink onto the work piece 50 to perform printing, so that the work piece 50 has a wood grain pattern or an oil painting. A three-dimensional pattern having a concavo-convex shape such as can be expressed.

In another embodiment, the plurality of spray nozzles 110 in each print head 11 are not divided into the front ink discharge unit 111 and the rear ink discharge unit 112, and ink is applied to all the spray nozzles 110 of each print head 11. May be filled. In this case, it is necessary to install the spray nozzle 110 filled with white ink in front of the spray nozzle 110 filled with color ink.

In still another embodiment, the distance in the front-rear direction of the discharge range of the white ink printing member 12 and the color ink printing member 13 may not be set to be the same. For example, if the distance in the front-rear direction of the discharge range of the white ink printing member 12 and the color ink printing member 13 is set at a ratio of three to one, the vertical movement distance of the inkjet printer 10 each time when performing the vertical movement step is Since the discharge range of the color ink printing member 13 is the same as the distance in the front-rear direction, the white ink printing member 12 reciprocates in the horizontal direction in each printing area of the workpiece 50 to discharge white ink. Perform three times (because the white ink printing member 12 is divided into three equal parts, printing is performed three times in each printing area during vertical movement). Further, when the white ink printing member 12 moves laterally to the printing area of the workpiece 50, it can be reciprocated a plurality of times to form a shape having a high and low undulation of the three-dimensional pattern.

Furthermore, in another embodiment, in the moving step, the moving distance of each time the inkjet printer 10 may be set smaller than the distance in the front-rear direction of the printing area of the white ink printing member 12 and the color ink printing member 13. In this way, the white ink is reciprocated in the horizontal direction in each printing area of the workpiece 50 by moving the white ink printing member 12 and the color ink printing member 13 in any one printing area of the workpiece 50. By discharging, the printing process can be performed a plurality of times. Therefore, if the white ink printing member 12 and the color ink printing member 13 are reciprocated a plurality of times in the horizontal direction in the printing area of the workpiece 50, a shape having a high and low undulation in a three-dimensional pattern can be formed.

In the embodiment of the present invention, the inkjet printer 10 moves in the front-rear direction with respect to the workpiece 50. However, in other embodiments, the inkjet printer 10 moves in the front-rear direction with respect to the workpiece 50. You can move.

As described above, the method of printing a three-dimensional pattern with the digitally controlled UV ink jet according to the present invention can save work time because the ink jet printer sequentially moves and prints the print area of the workpiece. By moving the print area of the workpiece a plurality of times without returning to the initial starting point, the ink jet printer forms a shape having high and low undulations of the three-dimensional pattern, so that the printing efficiency can be improved.

DESCRIPTION OF SYMBOLS 10 Inkjet printer 11 Print head 110 Spray nozzle 111 Front ink discharge part 112 Rear ink discharge part 12 White ink printing member 13 Color ink printing member 50 Work piece 51 First printing area 52 Second printing area 53 Third printing area 54 Fourth printing zone 55 Fifth printing zone 56 Sixth printing zone 57 Seventh printing zone 58 Eighth printing zone

Claims (5)

An ink jet printer having a white ink printing member and a color ink printing member each having a plurality of spray nozzles, wherein the white ink printing member is disposed in front of the color ink printing member, and a cover positioned below the ink jet printer. A preparatory step for preparing the workpiece;
When the inkjet printer moves laterally from one side of the workpiece to the other side is calculated as one time, the inkjet printer is reciprocated several times in the printing area of the workpiece, and the white ink is A three-dimensional step of forming a high and low undulation by discharging white ink onto a workpiece by a printing member;
A longitudinal movement step in which the inkjet printer moves longitudinally in one print area relative to the workpiece;
The three-dimensional step and the vertical movement step are alternately performed until the discharge range of the color ink printing member corresponds to the printing area of the workpiece,
When the inkjet printer moves laterally from one side of the workpiece to the other side is calculated as one time, the inkjet printer is reciprocated several times in the printing area of the workpiece, and the white ink printing is performed during the movement. The ink is ejected to two adjacent print areas of the workpiece by the member and the color ink printing member, and the high and low undulations are formed in the printing area by the white ink printing member, and the printing is performed by the color ink printing member. A coloring and three-dimensional step of coloring the printed area one area ahead;
A longitudinal movement step in which the inkjet printer moves longitudinally in one print area relative to the workpiece;
At this time, the coloring and three-dimensionalization step and the vertical movement step are alternately performed until the discharge range of the white ink printing member does not correspond to the printing area of the workpiece,
A coloring step of causing the ink jet printer to move laterally to a printing area of a workpiece and, when moving, to color the printing area by discharging the color ink by the color ink printing member;
A longitudinal movement step in which the inkjet printer moves vertically in one printing area;
At this time, the coloring step and the vertical movement step are alternately performed until the color is applied to all the print areas of the workpiece,
A method of printing a three-dimensional pattern with a digitally controlled UV inkjet, wherein a printing operation is completed by sequentially performing each of the steps. The method for printing a three-dimensional pattern with a digitally controlled UV inkjet according to claim 1, wherein the distance in the front-rear direction of the ejection range of the white ink printing member and the color ink printing member in the inkjet printer is the same. The inkjet printer includes a plurality of print heads arranged along the left-right direction, and each of the print heads includes a plurality of spray nozzles arranged along the front-rear direction. And at least one of the print heads is filled with white ink, and the other print heads are filled with color ink, and the front ink is filled with white ink. 3. The digital control system according to claim 2, wherein a print head having a partial ink discharge portion is a white ink print member, and a print head having the rear ink discharge portion filled with color ink is a color ink print member. A method of printing a three-dimensional pattern by UV inkjet. In the coloring and three-dimensionalization step, the color ink is ejected from the color ink printing member while the ink jet printer moves laterally in the printing area. At this time, the ejection amount of the color ink corresponds to the number of movements by computer control. The method of printing a three-dimensional pattern with a digitally controlled UV ink jet according to any one of claims 1 to 3, wherein the color is colored at an appropriate density by ejecting it uniformly once. 5. The method according to claim 1, wherein, in the longitudinal movement step, the longitudinal movement distance of the inkjet printer each time is the same as the distance in the front-rear direction of the discharge range of the color ink printing member. A method of printing a three-dimensional pattern with a digitally controlled UV inkjet.

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