TWI501875B - Method for printing on a shiny surface by a uv inkjet printer with transparency and high color density - Google Patents

Description

UV inkjet printer glossy printing method with transparency and high color density

The invention relates to a glossy inkjet printing method for a UV inkjet printer with transparency and high color density, in particular to perform processing by performing at least three printing operations on a reflective film of a workpiece and retarding curing ink. The reflective film of the piece retains high reflectivity, high transparency and high color density after printing.

Because UV inkjet printers can print on many different materials or thicknesses of workpieces, in addition to providing faster printing speeds and consistent and consistent print quality, the reliable performance is also saved by the user. The printing and printing process of the color separation screen is quickly completed, enabling the UV inkjet printer to have a competitive advantage by bringing a variety of economical and practical printing solutions.

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 workpiece to be printed through the nozzles at the bottom of the inkjet head, and then the side of the inkjet module is used. The set UV lamp is projected onto the ink that has been sprayed onto the workpiece to cause the ink to harden and solidify quickly. When the workpiece is printed, the conventional printing is performed by one-way single printing or two-way printing in a bidirectional printing manner on each area to be printed of the workpiece to shorten the printing time.

However, when the UV inkjet printer described above finishes the pattern printing on a workpiece having a transparent reflective film surface, the glare and transparency of the reflective film of the workpiece are greatly reduced, and the printing on the reflective film of the workpiece is printed. The pattern also forms a thick color The low degree of the situation results in a poor quality of the printed image of the UV inkjet printer on the workpiece having the surface of the transparent retroreflective film. Therefore, in order to overcome this shortcoming, the conventional process is a pattern pattern required for cutting by a cutting machine in a colored transparent film, and then the colored transparent film under the cutting is adhered to the reflective film of the processing member to form on the reflective film of the processed member. The pattern required, but the steps of this method are complicated and relatively high cost and low yield.

In view of this, in order to improve the above disadvantages, the UV inkjet printer glossy printing method with transparency and high color density can finish the printing of the workpiece with the surface of the transparent reflective film, and then the reflective film of the workpiece is still The invention can be produced by maintaining a high-reflectivity and high-transparency surface, and allowing the pattern printed thereon to have a high color density, and the inventors have accumulated years of experience and continuous development and improvement.

The main object of the present invention is to provide a glossy inkjet printing method for a UV inkjet printer having transparency and high color density, by performing at least three printing operations on each printing area of the processing member reflective film, and At the same time as the last printing work in each printing area, the UV lamp on one side of the inkjet module is turned on to cure the ink ejected by the inkjet module, so that the reflective film of the processing component still has high glare after printing. High transparency and high color density to greatly increase the quality of printing on processed parts with reflective film, reduce cost and increase work efficiency.

Another object of the present invention is to provide a glossy inkjet printing method for a UV inkjet printer having a transparency and a high color density, which performs at least three printing operations on each printing area of the processing member reflective film, and First print the first print area with the UV light off, and execute the next print area. At the same time of printing work, the UV lamp on one side of the inkjet module is turned on to cure the ink ejected by the inkjet module, so that the reflective film of the workpiece has high reflectivity, high transparency and high color density after printing. In order to greatly increase the quality of printing on the processed parts with reflective film, and reduce costs and increase work efficiency.

For the above purposes, the UV inkjet printer glossy printing method with transparency and high color density provided by the present invention comprises the following steps: (a) processing with a reflective film according to the conveying direction of the workpiece The part is divided into a plurality of consecutive printing areas; (b) performing at least three printing operations on each printing area of the processing member reflective film; and (c) performing the last printing operation of each printing area, opening The UV lamp on one side of the inkjet module cures the ink ejected by the inkjet module.

In implementation, in step (b), the moving direction of the last printing operation of each printing area is opposite to the moving direction of the first printing operation of the next printing area, and the turned-on UV lamp system is The ink jet module faces away from the UV lamp provided on one side of the printing direction.

In the implementation, in step (b), three printing operations are performed in each printing area, and the first printing operation and the second printing operation are performed at the same printing speed, and the last column is printed. The printing speed of the printing job is lower than the printing speed of the first printing job.

In the implementation, in step (b), when the printing operation is performed three times in each printing area, the first printing work and the last printing work are performed at the same printing speed, and lower than the first time. Print the print speed of the print speed to perform the second print job.

In implementation, in step (c), the UV lamps on both sides of the inkjet module are alternately turned on, so that the last printing operation of each printing area and the last printing operation of the next printing area are on different sides. The UV lamp cures the ink.

In practice, the inkjet module is provided with a plurality of ink cartridges for storing ink of each color in the two ink cartridges, and the two ink cartridges are symmetrically arranged with respect to a center line of the inkjet module.

In a second embodiment of the present invention, the UV inkjet printer glossy printing method with transparency and high color density provided by the present invention comprises the following steps: (a') according to the processing direction of the workpiece, The processed member having the reflective film is divided into a plurality of consecutive printing areas; (b') performing at least three printing operations on each printing area of the processing member reflective film; and (c') performing the next printing area When printing for the first time, turn on the UV lamp on one side of the inkjet module to cure the ink ejected by the inkjet module.

When the second embodiment is implemented, in step (b'), the moving direction of the last printing operation of each printing area is opposite to the moving direction of the first printing operation of the next printing area, and The turned-on UV lamp is a UV lamp provided on one side of the inkjet module facing the printing direction.

When the second embodiment is implemented, in step (c'), after the last printing operation of the last printing area is completed, the ink jetting module is stopped in the inkjet state, and the last time The direction in which the printing work moves in the opposite direction traverses the workpiece, and the UV lamp provided on the side of the inkjet module facing the moving direction is opened to cure the ink.

When the second embodiment is implemented, it is attached to each printing area in step (b'). The field performs three printing jobs, and the first printing job and the second printing job perform printing at the same printing speed, and the printing speed of the last printing job is lower than the first printing. The printing speed of the work.

When the second embodiment is implemented, in the step (b'), when the printing operation is performed three times for each printing area, the first printing work and the last printing work are performed at the same printing speed. And the second printing job is performed at a printing speed lower than the printing speed of the first printing job.

When the second embodiment is implemented, in step (c'), the UV lamps on the two sides of the inkjet module are turned on in an alternating manner to apply UV on different sides of the inkjet module in adjacent printing regions. The lamps alternately cure the ink.

In the implementation of the second embodiment described above, in the step (c'), after the printing operation of the first printing area is completed in such a manner that the UV lamp is turned off, the printing operation of the next printing area is performed.

In a third embodiment of the present invention, the UV inkjet printer glossy printing method with transparency and high color density provided by the present invention comprises the following steps: (a") according to the processing direction of the workpiece, The processed part having the reflective film is divided into a plurality of consecutive printing areas; (b") the ink jetting module performs three printing operations on each printing area of the processing member reflective film; and (c") is executed after each execution After the last printing operation of a printing area, the inkjet module is traversed with the workpiece in a direction opposite to the direction of the last printing operation, and the inkjet module is opened. A UV lamp provided on one side of the moving direction to cure the ink ejected by the ink jet module.

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

Please refer to FIGS. 1A and 1B , which are schematic diagrams showing the actuation structure of the first embodiment of the method for printing a glossy inkjet printer with transparency and high color density according to the present invention, wherein the UV inkjet printer has The inkjet module 2 is provided with a plurality of ink cartridges 21 (as shown in FIG. 2) for storing ink of each color in the two ink cartridges 21, and the two ink cartridges 21 are opposite to the inkjet module 2 One center line 22 is symmetrically arranged such that the ink cartridges 21 are black (K)-cyan (C)-magenta (M)-yellow (Y)-yellow (Y)-magenta (M)-cyan (C ) - The order in which black (K) is arranged. Furthermore, a UV lamp 23 is respectively disposed on both sides of the inkjet module 2. The method performs the printing operation by moving back and forth, and comprises the following steps: (a) dividing a workpiece having a reflective film into a plurality of consecutive printing areas according to the conveying direction of the workpiece; (b) reflecting the workpiece Performing three printing operations on each printing area of the film; and (c) performing the last printing operation of each printing area, turning on the UV lamp on one side of the inkjet module to cure the ink ejected by the inkjet module .

The surface of the workpiece 1 has a transparent reflective film (not shown) for the inkjet module to print ink thereon. Furthermore, according to the longitudinal advancement conveying direction of the workpiece 1, the UV inkjet printer divides the workpiece 1 into a plurality of consecutive printing areas (11, 12, 13, 14), and the reflective film of the workpiece 1 On each of the printed areas, the printer is executed three times in a horizontally and horizontally printed manner. Therefore, the moving direction of the last printing operation of the inkjet module in each printing area is opposite to the moving direction of the first printing operation of the next printing area.

The inkjet module of the UV inkjet printer, when performing the last printing operation in each printing area, opens the UV lamp provided on the side of the inkjet module facing away from the printing direction to cure the spraying. The ink ejected from the ink module. Taking the printing area 11 as an example, the inkjet module performs three printing operations on the left and right sides of the printing information with the same image above the printing area 11, wherein, in the first and second printing operations, Printing is performed to the left and right by sequentially turning off the UV lamp, and printing is performed to the left in the third printing operation, and the UV to the right of the inkjet module is turned on during printing. A lamp is used to cure the ink printed on the printing area 11. After the three printing operations of the printing area 11 are completed, the UV inkjet printer then moves the processing member 1 forward, and the printing area 12 of the processing member 1 is displaced to the lower side of the inkjet module for printing. In contrast, in the third printing operation of the printing area 12, printing is performed in the right direction, and the UV lamp on the left side of the inkjet module is turned on during printing to solidify the printing on the printing area 12. Ink. Therefore, on the printing area adjacent to the workpiece 1, the UV lamps on the left and right sides of the inkjet module are alternately turned on, so that the last printing operation of the adjacent printing areas is performed by UV lamps on different sides. .

In this embodiment, the first printing operation of each printing area and the second printing operation are performed at the same printing speed a, and the third (last) printing operation is performed. The printing speed b is lower than the printing speed a of the first printing job. Furthermore, the printing speed of the three printing jobs on each printing area can also be set to perform printing at the same printing speed c with the first printing operation and the third (last) printing operation, and The printing speed d of the second printing job is low The printing speed c of the first print job. Since the ink cartridges of the same color in the inkjet module are symmetrically arranged with respect to the center line of the inkjet module, when two different colors of ink are sprayed at the same position of the workpiece, for example, yellow and cyan, it can be rightward. When printing, the yellow and cyan ink cartridges 21 on the left side of the center line 22 are activated, and the yellow and cyan inks are sequentially ejected, and when printing to the left, the yellow and cyan ink cartridges 21 on the right side of the center line 22 are activated to sequentially eject yellow and The cyan ink can be used to spray the yellow and cyan inks in the same position on the workpiece during the printing process to the left and right.

Please refer to FIGS. 3A and 3B , which are schematic diagrams showing the actuation structure of the second embodiment of the method for printing a glossy inkjet printer with transparency and high color density according to the first embodiment of the present invention. Based on the following steps, the method comprises the following steps: (a') dividing a workpiece having a reflective film into a plurality of consecutive printing regions according to the conveying direction of the workpiece; (b') performing on each printing region of the reflective film of the workpiece Three times of printing work; and (c') performing the first printing job of the next printing area, turning on the UV lamp on one side of the inkjet module to cure the ink ejected by the inkjet module.

The surface of the workpiece 1 has a transparent reflective film (not shown) for the inkjet module to print ink thereon. Furthermore, according to the longitudinal advancement conveying direction of the workpiece 1, the UV inkjet printer divides the workpiece 1 into a plurality of consecutive printing areas (11, 12, 13, 14) and reflects on the workpiece 1. On each printing area of the film, the printing operation is performed three times in a laterally printing manner, so that the moving direction of the last printing operation of the inkjet module in each printing area is the first in the next printing area. The sub-printing work moves in the opposite direction.

When the inkjet module of the UV inkjet printer performs the printing operation of the printing area 11, the printing area 11 is printed back and forth with the same image printing state in the state where the UV lamp is turned off. Print the work. When the three printing operations of the printing area 11 are completed, the UV ink jet printer moves the processing member 1 forward, and the printing area 12 of the processing member 1 is advanced to the lower side of the ink jetting module for printing. When performing the first printing operation of the printing area 12, the inkjet module moves to the right and turns on the UV lamp disposed on the right side of the inkjet module to cure the ink ejected by the inkjet module; then, The inkjet module performs the second and third printing operations of the printing area 12 sequentially to the left and to the right in a state where the UV lamp is turned off. When the three printing operations of the next printing area (printing area 13) are performed, the printing operation is the same as that of the printing area 12, and when the first printing operation of the printing area 12 is performed, The UV lamp provided on one side (left side) of the inkjet module facing the printing direction is opened to cure the ink ejected by the inkjet module, and then sequentially arranged to the right and leftward while the UV lamp is off. The second and third print jobs of the print area 12. Therefore, on the printing areas 12, 13, 14 of the processing member 1, the ink jet module alternately turns on the UV lamps on the left and right sides thereof, so that the first printing operation of the adjacent printing areas is performed on different sides of the UV. The lamp cures the ink.

Then, when the last printing operation of the last printing area (printing area 14) of the workpiece 1 is completed, the UV inkjet printer is stopped from moving the workpiece 1 and the inkjet module is stopped. In the state of the ink, moving in the opposite direction to the last printing work moving direction (to the right), moving to the left and traversing the workpiece 1, and opening the left side UV of the inkjet module facing the moving direction when traversing A lamp to cure the ink.

Similarly, in this embodiment, the first printing operation of each printing area Printing is performed at the same printing speed a as the second printing operation, and the printing speed b of the third (last) printing job is lower than the printing speed of the first printing operation a . Furthermore, the printing speed of the three printing jobs on each printing area can also be set to perform printing at the same printing speed c with the first printing operation and the third (last) printing operation, and The printing speed d of the second printing job is lower than the printing speed c of the first printing job.

Please refer to FIG. 4 , which is a schematic diagram of the actuation structure of the third embodiment of the method for printing a glossy inkjet printer with transparency and high color density according to the present invention, which is based on the architecture of the first embodiment. , comprising the steps of: (a) dividing a workpiece having a reflective film into a plurality of consecutive printing areas according to the conveying direction of the workpiece; (b") printing the inkjet module on each of the reflective films of the workpiece Performing three printing operations on the area; and (c)) after performing the last printing operation in each printing area, causing the inkjet module to stop moving the ink, in the same direction as the last printing operation The opposite direction traverses the workpiece and opens the UV lamp provided on the side of the inkjet module facing away from the moving direction to cure the ink ejected by the inkjet module.

Wherein, when the inkjet module of the UV inkjet printer performs the printing operation of the printing area 11, the printing area 11 is printed back and forth with the same image printing state in the state where the UV lamp is turned off. Three print jobs. After the three printing operations of the printing area 11 are completed, the UV inkjet printer causes the ink jet module to traverse the right direction in a direction opposite to the last printing work moving direction in a state where the ink ejection is stopped. Machining the piece and opening the side of the ink jet module facing away from the moving direction (left) The UV lamp is set to cure the ink ejected from the inkjet module. Then, the workpiece 1 is moved forward, the printing area 12 of the workpiece 1 is advanced to the lower side of the inkjet module for printing, and the above steps are repeated until the printing of all the printing areas is completed. Therefore, on each of the printing areas 11, 12, 13, and 14 of the processing member 1, the ink-jet modules are all UV lamps on the left side of the ink-jet module, after completing all the printing operations in each printing area, and then The ink that is sprayed over the print area is cured.

According to the above embodiments, the transparent reflective film on the surface of the workpiece 1 can still have high reflectivity, high transparency and high color density after printing on the UV inkjet printer to ensure print quality.

Therefore, the present invention has the following advantages:

1. The invention subverts the traditional incremental ink to reduce the concept of glare and transparency of the reflective film of the workpiece, and performs more than three printing operations on each printing area of the workpiece, the printing work including at least one time Reciprocating printing work, and adjusting the printing rate of the printing work, and then using the opening and closing timing of the UV lamp to delay the curing of the ink, so that the transparent reflective film on the surface of the workpiece is printed on the UV inkjet printer It still has high reflectivity, high transparency and high color density to greatly increase the print quality on the processed parts with reflective film, and reduce cost and increase work efficiency.

2. The invention can be directly applied to various UV inkjet printers to increase the utility and product competitiveness of the UV inkjet printer.

In summary, according to the above disclosure, the present invention can achieve the intended purpose of the invention, and provides a transparent reflective film on the surface of the workpiece that can maintain high reflectivity and high transparency after printing. Surface and can be printed on it The pattern has a high color density, and the UV inkjet printer glossy printing method with transparency and high color density is of great value in industrial use, and the invention patent application is filed according to law.

1‧‧‧Processing parts

11, 12, 13, 14‧‧ Printed areas

2‧‧‧Inkjet Module

21‧‧‧Ink 匣

22‧‧‧ center line

23‧‧‧UV lamp

1A and 1B are schematic views of the architecture of the first embodiment of the present invention.

Figure 2 is a schematic view showing the structure of the ink jet module in the embodiment of Figure 1.

3A and 3B are schematic diagrams showing the architecture of the second embodiment of the present invention.

Figure 4 is a schematic diagram of the architecture of the third embodiment of the present invention.

1‧‧‧Processing parts

11, 12, 13, 14‧‧ Printed areas

Claims (22)

A bright inkjet printing method for a UV inkjet printer with transparency and high color density, the inkjet module of the UV inkjet printer performs printing operation by moving back and forth, and the inkjet module is A UV lamp is respectively arranged on both sides, and the method comprises the following steps: (a) dividing a workpiece having a reflective film into a plurality of consecutive printing areas according to the conveying direction of the workpiece; (b) each of the reflective films of the workpiece Performing at least three print jobs on a print area; and (c) performing the last print job in each print area, turning on the UV lamp on one side of the ink jet module to cure the ink ejected by the ink jet module. The method of claim 1, wherein in the step (b), the moving direction of the last printing operation of each printing area is the moving direction of the first printing operation of the next printing area. in contrast. The method of claim 2, wherein the turned-on UV lamp is a UV lamp provided on a side of the inkjet module facing away from the printing direction. The method of claim 3, wherein in step (b), three printing operations are performed in each printing area, and the first printing operation is the same as the second printing operation. The print speed is printed. The method of claim 4, wherein the printing speed of the last printing operation is lower than the printing speed of the first printing operation. The method of claim 3, wherein in step (b), three printing operations are performed in each printing area, and the first printing operation is the same as the last printing operation. The print speed is printed. The method of claim 6, wherein the printing speed of the second printing operation is lower than the printing speed of the first printing operation. The method of claim 1, wherein in step (c), the UV lamps on both sides of the inkjet module are alternately turned on, so that the last printing operation and the next printing of each printing area are performed. The last printing job in the area is to cure the ink with UV lamps on different sides. The method of claim 1, wherein the inkjet module is provided with a plurality of ink cartridges, wherein each color of ink is stored in two of the ink cartridges, and the two ink cartridges are opposed to the inkjet cartridges. One of the center lines of the module is arranged symmetrically. A bright inkjet printing method for a UV inkjet printer with transparency and high color density, the inkjet module of the UV inkjet printer performs printing operation by moving back and forth, and the inkjet module is A UV lamp is respectively disposed on both sides, and the method comprises the following steps: (a') dividing a workpiece having a reflective film into a plurality of consecutive printing areas according to the conveying direction of the workpiece; (b') reflecting the film on the workpiece Performing at least three print jobs on each print area; and (c') performing the first print job of the next print area, turning on the UV lamp on one side of the ink jet module to cure the ink jet mold The ink ejected from the group. The method of claim 10, wherein in the step (b'), the moving direction of the last printing operation of each printing area is shifted from the first printing operation of the next printing area. The opposite direction. The method of claim 11, wherein the turned-on UV lamp is a UV lamp provided on a side of the inkjet module facing the printing direction. The method of claim 10, wherein in the step (c'), after the last printing operation of the last printing area is completed, the inkjet module is caused to stop in the inkjet state. The workpiece is traversed in a direction opposite to the direction in which the last printing job moves, and the UV lamp provided on the side of the inkjet module facing the moving direction is opened to cure the ink. The method of claim 12, wherein in step (b'), three printing operations are performed in each printing area, and the first printing operation is the same as the second printing operation. The printing speed is printed. The method of claim 14, wherein the printing speed of the last printing operation is lower than the printing speed of the first and second printing jobs. The method of claim 12, wherein in step (b'), three printing operations are performed in each printing area, and the first printing operation is the same as the last printing operation. The print speed is printed. The method of claim 16, wherein the printing speed of the second printing job is lower than the printing speed of the first printing job. The method of claim 10, wherein in step (c'), the UV lamps on both sides of the inkjet module are opened in an alternating manner to use an inkjet mode in an adjacent printing area. The UV lamps on different sides of the group alternately cure the ink. The method of claim 10, wherein in the step (c'), the printing operation of the first printing area is completed after the UV lamp is turned off, and then the next printing area is executed. Print the work. The method of claim 10, wherein the inkjet module is provided with a plurality of ink cartridges for storing ink of each color therein. And the two ink cartridges are symmetrically arranged with respect to a center line of the inkjet module. A bright inkjet printing method for a UV inkjet printer with transparency and high color density, the inkjet module of the UV inkjet printer performs printing operation by moving back and forth, and the inkjet module is A UV lamp is respectively disposed on both sides, and the method comprises the following steps: (a) dividing a processed part having a reflective film into a plurality of consecutive printing areas according to the conveying direction of the workpiece; (b") making the inkjet module Performing three printing operations on each printing area of the processing member reflective film; and (c)) after performing the last printing operation of each printing area, causing the ink ejection module to stop the ink ejection state, The workpiece is traversed in a direction opposite to the direction in which the last printing job is moved, and the UV lamp provided on the side of the inkjet module facing away from the moving direction is turned on to cure the ink ejected by the inkjet module. The method of claim 21, wherein the inkjet module is provided with a plurality of ink cartridges, wherein each color of ink is stored in two of the ink cartridges, and the two ink cartridges are opposed to the inkjet cartridges. One of the center lines of the module is arranged symmetrically.