WO2015095990A1

WO2015095990A1 - Inkjet printing apparatus and printing method

Info

Publication number: WO2015095990A1
Application number: PCT/CN2013/090180
Authority: WO
Inventors: 张原�
Original assignee: 北京美科艺数码科技发展有限公司; 张原�
Priority date: 2013-12-23
Filing date: 2013-12-23
Publication date: 2015-07-02
Also published as: CN105073427A; CN105073427B

Abstract

An inkjet printing apparatus comprises a support (2), a small printing vehicle (3), and a control system. The support (2) is used for mounting the small printing vehicle (3). A first driving mechanism is mounted on the support (2). The first driving mechanism is used for driving the small printing vehicle (3) to move front and back along a second direction perpendicular to a guide rail beam (1). The support (2) roughly moves left and right along a first direction parallel to the guide rail beam (1) at a constant speed. At least one printing head is mounted on the small printing vehicle (3). The control system is used for controlling work of the support (2), the small printing vehicle (3) and the printing head. In the inkjet printing apparatus, the support (2) with a driving mechanism is disposed, the small printing vehicle (3) is mounted on the guide rail beam (1), the support (2) moves along the direction of the guide rail beam (1) and drives the small printing vehicle (3) moves along the guide rail beam (1), and the driving mechanism disposed on the support (2) drives the small printing vehicle (3) to perform relative motion along the direction perpendicular to the guide rail beam (1). The inkjet printing apparatus has the advantages of having a simple structure and a small volume, and needs low cost.

Description

Inkjet printing device and printing method

技术领域Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an ink jet printing apparatus and a printing method, and more particularly to an ink jet printing apparatus and printing method in which a printing carriage can reciprocate in a direction of a rail beam and move in a direction perpendicular to a rail beam.

背景技术Background technique

Inkjet printing technology refers to a technique of ejecting ink droplets onto a printing medium through a head to obtain a printed image or text. The technology is non-contact printing, and has wide printing speed, low pollution, and a variety of printing media that can be adapted, and is widely used in industrial applications.

Inkjet printing is divided into two types: Scanning inkjet printing and Onepass inkjet printing according to the movement mode of the printing carriage and the printing medium. The scanning inkjet printing includes roll-to-roll inkjet printing and peace. There are two types of desktop inkjet printing, in which the roll-to-roll inkjet printing process moves the carriage along the rail beam relative to the printing medium during the inkjet printing process, and the printing medium moves relative to the direction perpendicular to the moving direction of the printing carriage to install the printing trolley. The rail beam is stationary; in the case of inkjet printing, there are two cases in the inkjet printing process. One is that the rail beam does not move during the inkjet printing process, and the printing carriage moves back and forth along the rail beam, and the printing platform is perpendicular to the printing platform. The direction in which the direction of movement of the carriage is moved relative to each other; and the other is that the printing platform is stationary, the carriage moves back and forth along the rail beam relative to the printing medium, and the rail beams are relatively moved in a direction perpendicular to the rail beam. In the case of one-time paper imaging inkjet printing, the printing carriage is stationary during the inkjet process, and the printing medium moves in one direction at a high speed. The use of one-time paper imaging inkjet printing requires high print accuracy and print width of the print head. The print accuracy of the print head needs to be the print precision of the image, and the print width of the print head needs to be the print width of the image. Ways to achieve high precision and a wider print width by means of a serial nozzle, but this inevitably increases the number of nozzles, whether using high-precision nozzles or high print accuracy through multiple nozzles, which necessarily makes the printer The cost is increasing.

In the prior art, the printing platform is mostly stationary, the printing carriage reciprocates along the rail beam relative to the printing medium, and the rail beam is relatively moved in a direction perpendicular to the rail beam to improve printing precision and printing efficiency. In view of the fact that the rail beam itself is heavier, the design of the moving mechanism is relatively complicated and costly.

发明内容Summary of the invention

In view of the problems existing in the prior art, the object of the present invention is to provide an ink jet printing apparatus which is simple in structure, low in cost, high in printing precision, and can reciprocate in the direction of the rail beam and in the direction perpendicular to the rail beam. .

To achieve the object, the present invention provides an inkjet printer including a bracket that reciprocates substantially in a first direction parallel to the rail beam at a constant speed; a printing carriage mounted on the bracket, ??? mounting at least one print head on the printing carriage, and setting a plurality of nozzles for ejecting ink droplets on the print head; a control system for controlling the work of the bracket, the printing carriage and the print head; setting a bracket on the bracket a drive mechanism for driving the carriage to move relative to each other in a second direction perpendicular to the rail beam.

In the above inkjet printing device, the carriage and the printing carriage are moved in such a manner that the bracket moves from one end in the first direction to the other end, and the manner of returning from the other end to the one end relative to the printing medium, the printing carriage is in the Relative movement of the printing medium in the second direction in the state of one end.

In the above inkjet printing device, the carriage and the printing carriage may be moved in such a manner that after the carriage moves from one end in the first direction to the other end, the printing carriage is in the second direction relative to the printing medium in the state of the other end. Relatively moving, the carriage then moves from the other end in the first direction relative to the print medium to one end.

In the above inkjet printing device, a second driving mechanism is further disposed on the bracket for driving the printing carriage to move up and down in a third direction to adjust the distance between the plane of the nozzle of the printing head on the printing carriage and the printing medium to adapt to Print media of different thicknesses. In inkjet printing, the distance between the plane of the nozzle of the print head and the printing medium is 2 to 3 mm.

In the above ink jet printing apparatus, a curing device is provided at each of the left and right ends of the printing carriage, and the curing device is composed of a plurality of LEDs for illuminating ultraviolet rays arranged in the second direction.

The present invention also provides a printing method of an inkjet printing apparatus according to the present invention, which comprises ejecting ink droplets from a nozzle mounted on a printing carriage, and irradiating ultraviolet rays to the printing medium by a curing device disposed at both ends of the printing carriage. The ink droplet is solidified to achieve printing, the carriage is relatively reciprocated relative to the printing medium in a first direction, and the printing carriage is relatively moved relative to the printing medium in a second direction orthogonal to the first direction; the printing method comprises the following steps a first step of ejecting ink droplets from the print head to the printing medium while moving the carriage from the one end to the other end in the first direction relative to the printing medium, and irradiating the ultraviolet rays in the self-curing device to solidify the ink droplets; The printing carriage is relatively moved in the second direction relative to the printing medium in a state of one end; in the third step, the ink ejected from the printing head while moving the bracket in the first direction relative to the printing medium from the other end to one end The droplet is superimposed on a part of the ink droplet attached to the printing medium in the first step, and the ultraviolet light is irradiated from the self-curing device Curing the ink droplets; a fourth step, repeat the first, second and third step until the printing is completed.

The printing method of the inkjet printing device further includes driving the printing carriage in the third direction by the second driving mechanism disposed on the bracket before the first step to adjust the plane between the nozzle of the printing head on the printing carriage and the printing medium. The distance is such that the ink jet printing apparatus is adapted to print images on print media of different thicknesses, and the distance between the plane of the nozzles generally suitable for printing in the ink jet printing field and the print medium is 2 to 3 mm.

The present invention also proposes a printing method of another ink jet printing apparatus according to the present invention, which comprises ejecting ink droplets by a print head mounted on a printing carriage, and to a printing medium by a curing device disposed at both ends of the printing carriage Irradiating ultraviolet rays to cure the ink droplets to achieve printing, the carriage is relatively reciprocated relative to the printing medium in a first direction, and the printing carriage is relatively moved relative to the printing medium in a second direction orthogonal to the first direction; the printing method includes The first step is: when the bracket is moved from one end to the other end in the first direction, the ink droplet is ejected from the printing head to the printing medium; in the second step, the bracket is returned from the other end to the end. When the printing medium is relatively moved, the ink droplets ejected from the printing head are superimposed on the ink droplets attached to the printing medium in the first step, and the ultraviolet rays are irradiated from the curing device to solidify the ink droplets; the third step is to make The printing carriage moves relative to the printing medium in the second direction in the state of one end; in the fourth step, repeating the first step, the first Step and the third step until printing is complete.

The printing method of the above inkjet printing apparatus further includes driving the printing carriage in a third direction by a second driving mechanism disposed on the bracket before the first step to adjust a plane of the nozzle of the printing head on the printing carriage and The distance between the printing media, so that the inkjet printing device is suitable for printing images on printing media of different thicknesses, and the distance between the plane of the nozzles generally suitable for printing and the printing medium in the field of inkjet printing is 2~3 mm. .

According to the inkjet printing device of the present invention, the printing carriage reciprocates along the rail beam during the printing process, and performs relative movement in a direction perpendicular to the rail beam. The inkjet printing device of the present invention installs a carriage with a belt drive mechanism to mount the printing carriage on the rail beam, and moves the bracket along the rail beam direction to drive the printing carriage to move along the rail beam, and drives the printing through a driving mechanism disposed on the bracket. The carriage moves relative to each other in a direction perpendicular to the rail beam. Thereby, the structure of the ink jet printing apparatus is greatly simplified, the size of the printing apparatus is reduced, and the machine cost is reduced.

附图说明DRAWINGS

Figure 1 is a perspective view of an ink jet printing apparatus of the present invention;

2 is a perspective view showing the printing carriage mounted on the bracket in the inkjet printing apparatus of the present invention;

Figure 3 is a perspective view of a bracket in the ink jet printing apparatus of the present invention;

4 is a flow chart of a printing method of the inkjet printing apparatus of the present invention;

Figure 5 is a flow chart showing another printing method of the ink jet printing apparatus of the present invention.

具体实施方式detailed description

The ink jet printing apparatus and ink jet printing method of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Fig. 1, the ink jet printing apparatus of the present invention comprises a printing carriage 3, a rail beam 1, a bracket 2, a paper feed mechanism (not shown), and a control system (not shown). The rail beam 1 includes a cross bracket 11 and a left pillar 10a and a right pillar 10b. A driving mechanism for driving the bracket 2 in the first direction is mounted on the horizontal bracket 11. The driving mechanism is composed of a servo motor 15 and a belt 12 and a left pulley 13a and a right pulley 13b which are disposed at one end of the horizontal bracket 11. The left pulley 13a and the right pulley 13b are respectively disposed at the left and right ends of the horizontal bracket 11, wherein the left pulley 13a is connected to the servo motor 15, and the belt 12 is connected to the left pulley 13a and the right pulley 13b by the servo motor 15 The left pulley 13a is rotated to drive the belt 12 to move. A grating 17 is also mounted on the cross bracket 11 for positioning the movement position of the printing carriage in the first direction. Further, an upper rail 14b and a lower rail 14a are attached to the horizontal bracket 11, and two sliders are mounted on the rear surface of the bracket 2 to be fitted with the upper rail 14b and the lower rail 14a, so that the bracket 2 can be along the upper rail 14b and the lower rail 14a. The first direction (left and right direction) is free to move back and forth. A tow link plate 16 and an e-chain 18 are also mounted on the horizontal bracket 11. The end of the towline 18 is connected to the bracket 2, and the other end is mounted on the tow link plate 16. The tow link plate 16 is a groove structure, and the towline 18 is Movement back and forth within the groove structure.

The print carriage 3 is mounted on the carriage 2, and a print head including inks for ejecting magenta (M), yellow (Y), cyan (C), and black (K) inks, and a print head for each color ink are mounted on the carriage 3. At least one, in order to increase the printing speed, multiple print heads can be used to print the same color ink. An ink cartridge for accommodating ink and a corresponding negative pressure control system may be disposed on the printing carriage 3. The ink used in the printhead of the present invention is UV ink.

A curing device 32 is attached to each end of the printing carriage 3, respectively. The curing device of the present invention is composed of a plurality of LEDs for illuminating ultraviolet rays arranged in the second direction.

The bracket 2 is mounted on the rail beam 1 , and the control system control bracket reciprocates in the first direction (the direction of the rail beam, the X-axis direction often speaking in the ink jet printing field), and the control bracket 2 drives the printing cart 3 in the second direction. (The direction of the vertical rail beam, the Y-axis direction often referred to in the ink jet printing field) is relatively moved, and the print head mounted thereon is controlled to eject ink droplets onto the printing medium during the movement of the printing carriage 3. The rail beam 1 is mounted on the paper feeding mechanism by the left pillar 10a and the right pillar 10b. A servo motor 11 is mounted on the rail beam 1, and the servo motor drives the bracket 2 through the belt pulley 12 to drive the printing carriage mounted on the bracket. A substantially constant speed is moved left and right in the first direction, and the paper feed mechanism of the present invention can be in any form of the prior art, such as a platform type or a roll-to-roll type.

As shown in FIG. 2 and FIG. 3, a driving mechanism is disposed on the bracket 2, including a motor 21, a lead screw 22, and a nut 23. The output end of the motor 21 is connected to the lead screw 22, and the lead screw 23 is mounted on the lead screw 22. The female 23 is connected to the printing carriage 3 through the silk socket, and a slider 31 is mounted on each side of the printing carriage 3, and the slider 31 cooperates with the guide rail 25 disposed on both sides of the bracket 2, and the screw 22 and the wire are driven by the motor 21. The mother 23 rotates to drive the carriage 3 to move back and forth in the second direction.

The bracket 2 and the printing carriage 3 in the present invention are moved in such a manner that the bracket 2 moves from one end in the first direction (the right end in the drawing) to the other end (the left end in the figure), and the manner of returning from the other end to the one end is relatively The printing medium is relatively moved, and then the printing carriage 3 is relatively moved in the second direction with respect to the printing medium in a state of one end (moving from the rear to the front).

The movement of the bracket 2 and the printing carriage 3 in the present invention may also be such that after the carriage 2 is moved from one end in the first direction to the other end, the printing carriage 3 is in the second direction relative to the printing medium in the state of the other end. The relative movement is performed, and then the bracket 2 is moved from the other end in the first direction to the printing medium to one end.

A second driving mechanism for driving the carriage 3 in the third direction (the third direction is a direction perpendicular to the plane of the printing medium, and the Z-axis direction often referred to in the ink-jet printing field) may be further disposed on the bracket 2 of the present invention. Move up and down to accommodate different thicknesses of print media.

The ink jet printing apparatus of the present invention can be printed on any of the paper feed mechanisms existing in the prior art, such as roll-to-roll or platform type.

Figure 4 is a flow chart showing a printing method of the ink jet printing apparatus of the present invention, which comprises ejecting ink droplets from a head mounted on a printing carriage, and irradiating the printing medium with ultraviolet rays by a curing device provided at both ends of the printing carriage. The ink droplets are solidified to achieve printing, and the carriage is relatively reciprocated relative to the printing medium in a first direction, and the printing carriage is relatively moved relative to the printing medium in a second direction orthogonal to the first direction, and the printing medium is stationary during the inkjet printing process. The printing method includes the following steps: First step S01, moving the bracket from the one end (the right end in FIG. 1) to the other end (the left end in FIG. 1) with respect to the printing medium in the first direction (X-axis). Ejecting ink droplets from the print head to the printing medium, and curing the ink droplets by irradiating ultraviolet rays from the curing device mounted at the right end of the printing carriage; and in the second step S02, the state of the printing carriage at the other end (the right end in FIG. 1) Lower stepwise movement in the second direction (Y axis) with respect to the printing medium; third step S03, while the bracket is in the first direction (X axis) relative to the printing medium Moving from the other end to one end, the ink droplets ejected from the print head are superimposed on a part of the ink droplets attached to the printing medium in the first step, and the ultraviolet rays are irradiated from the curing device mounted on the left end of the printing carriage to make the ink droplets The fourth step S04 determines whether the printed image is printed. If it is completed, the printing is directly ended. If the first step, the second step and the third step are not completed, the printing is completed.

The above printing method further includes adjusting the second driving mechanism to make the distance between the plane of the nozzle on the printing carriage and the printing medium a distance suitable for printing before the first step S01.

5 is a flow chart of another printing method of the inkjet printing apparatus of the present invention, the printing method comprising ejecting ink droplets by a printing head mounted on a printing carriage, and being provided by a curing device disposed at both ends of the printing carriage The printing medium irradiates ultraviolet rays to solidify the ink droplets to achieve printing, and the carriage moves relative to the printing medium in a first direction relative to the printing medium, and the printing carriage moves relative to the printing medium in a second direction orthogonal to the first direction, the inkjet The printing medium is stationary during printing; the printing method comprises the following steps: First step S001, while moving the bracket from one end to the other end in the first direction, ejecting ink droplets from the printing head to the printing medium, and self-installing The curing device at the right end of the printing cart irradiates ultraviolet rays to solidify the ink droplets; in the second step S002, while the bracket is returned to the one end from the other end, the ink droplets ejected from the printing head are superimposed on the above. The first step is attached to the ink droplets on the printing medium, and the ultraviolet light is irradiated from the curing device installed at the left end of the printing carriage. The ink droplet is solidified; in the third step S003, the printing carriage is stepped in the second direction with respect to the printing medium in a state of one end (the left end in FIG. 1 and the printing start end); in the fourth step S004, it is determined whether the printed image is The printing is completed, if it is completed, the printing is directly ended, and if it is not completed, the first step, the second step and the third step are repeated until the printing is completed.

The above printing method further includes adjusting the second driving mechanism to make the distance between the plane of the nozzle on the printing carriage and the printing medium a distance suitable for printing before the first step S001.

It is to be understood that any modifications may be made without departing from the spirit and scope of the invention.

Claims

An inkjet printing device comprising:

a bracket for mounting a printing carriage, wherein the bracket is provided with a first driving mechanism for driving the printing carriage to move back and forth along a second direction perpendicular to the rail beam, and the bracket is substantially constant The speed moves left and right along a first direction parallel to the rail beam;

a printing cart on which at least one print head is mounted;

A control system for controlling the operation of the carriage, the print carriage, and the printhead.
The ink-jet printing apparatus according to claim 1, wherein said holder is moved from one end in said first direction to the other end, and the manner of returning from said other end to said one end is relative to printing The medium is relatively moved, and the carriage moves relative to the printing medium in the second direction in a state of the one end.
The ink-jet printing apparatus according to claim 1, wherein said carriage is in a state of said other end after said carriage is moved from said one end in said first direction to said other end Lower relative movement relative to the print medium in the second direction, and then the carriage moves from the other end relative to the print medium to the one end in the first direction.
The ink-jet printing apparatus according to claim 1, wherein a second driving mechanism is further disposed on the bracket, and the second driving mechanism is configured to drive the printing carriage to be perpendicular to a plane perpendicular to the printing medium. Move in three directions up and down.
The ink-jet printing apparatus according to claim 1, wherein a curing device is disposed at each of left and right ends of said printing carriage.
The ink-jet printing apparatus according to claim 1, wherein said curing means is constituted by a plurality of LEDs for illuminating ultraviolet rays arranged in the second direction.
A printing method of an ink-jet printing apparatus according to any one of claims 1 to 6, wherein said printing method ejects ink droplets from a print head mounted on said printing carriage, and is disposed in said The curing device at both ends of the printing carriage irradiates ultraviolet rays to the printing medium to cure the ink droplets to achieve relative printing, and the carriage moves relative to the printing medium in a relative direction, the printing carriage is positive along the first direction The second direction of the intersection is relative to the printing medium; the printing method comprises the following steps:

a first step of ejecting ink droplets from the print head to the printing medium while moving the holder from the one end to the other end in a first direction relative to the printing medium, and irradiating ultraviolet rays from the curing device Curing the ink droplets;

a second step of causing the printing carriage to move relative to the printing medium in the second direction in a state of the other end;

In the third step, while the holder is moved from the other end to the printing medium along the first direction, the ink droplets ejected from the printing head are superimposed on the first step and attached to the printing. Part of the ink droplets on the medium, and ultraviolet rays are irradiated from the curing device to cure the ink droplets;

In the fourth step, the first step, the second step and the third step are repeated until the printing is completed.
A printing method according to claim 7, further comprising driving said printing carriage in a third direction to adjust said print head by said second driving mechanism provided on said carriage before said first step The distance between the plane of the nozzle and the print media.
A printing method of an ink-jet printing apparatus according to any one of claims 1 to 6, wherein said printing method ejects ink droplets from a print head mounted on said printing carriage, and is disposed in said The curing device at both ends of the printing carriage irradiates ultraviolet rays to the printing medium to cure the ink droplets to achieve relative printing, and the carriage moves relative to the printing medium in a relative direction, the printing carriage is positive along the first direction The second direction of the intersection is relative to the printing medium; the printing method comprises the following steps:

a first step of ejecting ink droplets from the print head to the printing medium while moving the holder from the one end to the other end in a first direction, and irradiating ultraviolet rays from the curing device to cure the ink droplets ;

In the second step, while the carriage is returned from the other end to the one end, the ink droplets ejected from the print head are attached to the print in the first step. On the ink droplets on the medium, and irradiating ultraviolet rays from the curing device to solidify the ink droplets;

In a third step, the printing carriage is relatively moved relative to the printing medium in the second direction in a state of the one end;

In the fourth step, the first step, the second step and the third step are repeated until the printing is completed.
A printing method according to claim 9, further comprising driving said printing carriage in a third direction to adjust said print head by said second driving mechanism provided on said carriage before said first step The distance between the plane of the nozzle and the print media.