TWI628069B - Ink jet printing apparatus and ink jet printing method - Google Patents

Abstract

The invention provides an inkjet printing device including a printing cart, at least one printing nozzle is installed on the printing cart, and a printing width of the printing nozzle is greater than or equal to a width of a printing medium disposed below; a first direction; A driving mechanism for installing a printing cart and controlling the printing cart to move back and forth in a first direction; a third direction driving mechanism for controlling the printing cart to perform a lifting movement in a third direction; a printing platform, said A printing medium is disposed above the printing platform; a control system controls the work of the printing cart, the first-direction driving mechanism, the third-direction driving mechanism, and the printing nozzle. The inkjet printing device of the present invention has various functions. The control system can realize multiple printing modes of 3D three-dimensional effect printing, platform scanning printing, and one-time paper feeding imaging printing. It can be applied to sheet materials and roll materials. High-resolution printing on a variety of print media.

Description

Inkjet printing device and printing method

The invention relates to an inkjet printing device and a printing method, in particular to an inkjet printing device and a printing method suitable for realizing a three-dimensional printing effect on a variety of printing media such as sheet materials and roll materials.

Ink-jet printing technology refers to a technology in which ink droplets are ejected onto a printing medium through a nozzle to obtain a printed image or text. This technology is non-contact printing, which has the advantages of fast printing speed, low pollution, and can adapt to a variety of printing media. It is widely used in industrial applications. Inkjet printing is divided into two types: scanning inkjet printing and one-pass inkjet printing according to the movement of the printing trolley and the printing medium. Scanning inkjet printing includes rolls. There are two types of roll-to-roll inkjet printing and desktop inkjet printing. Among them, roll-to-roll inkjet printing. During the inkjet printing process, the printing cart moves back and forth along the guide rail relative to the printing medium. Step by step in a direction perpendicular to the moving direction of the printing trolley, the guide rail mounted with the printing trolley is stationary; and the platform inkjet printing has two cases in the inkjet printing process, one is in inkjet During the printing process, the guide beam does not move, the printing trolley moves back and forth along the guide beam, and the printing platform moves stepwise in a direction perpendicular to the moving direction of the printing trolley; there is also a printing platform that is stationary and the printing trolley is stationary. It moves back and forth along the guide beam relative to the printing medium, and the guide beam moves stepwise in a direction perpendicular to the guide beam, thereby driving the printing cart to move stepwise in a direction perpendicular to the guide beam. In the case of one-pass inkjet printing, the printing cart is stationary during the inkjet process, and the printing medium moves at a high speed in one direction. The use of single-feed imaging inkjet printing requires high print accuracy and print width of the print head. The print accuracy of the print head must be the print accuracy of the image, and the print width of the print head must be the print of the image. The width, of course, can also be obtained by inserting the nozzles to obtain high precision and by connecting the nozzles to obtain a wider printing width, but this will necessarily increase the number of nozzles, whether using high-precision nozzles or multiple The high print accuracy achieved by each print head will inevitably increase the cost of the printer.

During one-pass imaging (Onepass) inkjet printing, a pattern with a 3D effect cannot be printed due to one pass of the printing medium, and the traditional Onepass inkjet printing device only uses It cannot be used for printing media of roll materials, but cannot print printing media of plate materials. Of course, it is impossible to print 3D effects on printing media of plate materials.

At the same time, one-pass inkjet printing also has limitations in terms of print resolution. If you want to improve the print quality, you can only replace the expensive high-resolution print head to increase the manufacturing cost. .

In view of the problems existing in the prior art, an object of the present invention is to provide an inkjet printing device with multiple functions, high resolution, and especially suitable for three-dimensional effect printing of multiple printing media (roll material or sheet material).

In order to achieve the object, the present invention provides an inkjet printing device, including: a printing cart, the printing cart is installed with at least one printing nozzle, the printing width of the printing nozzle is greater than or equal to The width of the printing medium, a curing device is installed at one or both ends of the printing cart; a first direction driving mechanism is used to install the printing cart and control the printing cart to move back and forth in the first direction; a third A directional driving mechanism controls the printing trolley to move up and down in a third direction; a printing platform on which a printing medium is disposed; and a control system that controls the printing trolley, The operations of the first direction driving mechanism, the third direction driving mechanism, and the print head.

The inkjet printing device further includes a paper feeding mechanism, and the paper feeding mechanism conveys the printing medium in the first direction.

The above inkjet printing device further includes a second direction driving mechanism. The second direction driving mechanism is connected to the printing cart through a bracket, and controls the printing cart to move in a second direction perpendicular to the first direction. Progressive motion is used to improve the resolution of the printed image.

In the above inkjet printing device, the first direction driving mechanism includes a first energy chain, a first direction guide, a first direction slider, a first motor, and a first bracket, and the control system controls the first motor to drive the printing unit. The vehicle moves in the first direction. During the movement, the first direction slider installed below the printing cart cooperates with the first direction guide rail above the first bracket to restrict the movement direction. In the above inkjet printing device, the first direction guide rail is provided at each of the front and rear ends above the printing platform, and the bottom surface of the print carriage is installed on two guide rails, and two slide rails are arranged in cooperation with each other. Piece.

In the above inkjet printing device, the printing carriage is driven by a first-direction driving mechanism to reciprocate with respect to the printing medium from the first direction and eject ink droplets from a nozzle, and superimpose printing multiple times back and forth Then, the third-direction driving mechanism drives the printing cart to rise in the third direction perpendicular to the printing platform, and then the control system continues to control the printing cart to print back and forth in the first direction.

In the above inkjet printing device, the printing cart is driven by a first direction driving mechanism to reciprocate with respect to the printing medium from the first direction and eject ink droplets from a nozzle, and the printing cart is After the cart moves to the starting end in the first direction again, it is driven by the second direction driving mechanism to make stepwise movement relative to the printing medium from the second direction, and then the printing cart continues in the first direction. The reciprocating motion and the ink droplets are ejected by the nozzle. After repeated printing multiple times in this way, the third direction driving mechanism drives the printing carriage to rise in the third direction perpendicular to the printing platform, and then the control system continues to control the printing carriage at The first direction and the second direction cooperate to perform superimposed printing.

The inkjet printing device further includes a loading and unloading device, which is arranged at the front and rear ends of the printing platform and is used for automatic loading and unloading operations of the plate-like printing medium.

The invention provides the printing method of the inkjet printing device, characterized in that the printing method ejects ink droplets from a nozzle mounted on the printing trolley, and is arranged on the printing trolley. The curing device irradiates the printing medium with ultraviolet rays to cure the ink droplets to achieve printing. The printing cart moves back and forth relative to the printing medium in the first direction, and the paper feeding mechanism moves along the first The printing medium is conveyed indirectly in the direction. The printing method includes the following steps. In the first step, the control system controls the printing cart to move back and forth relative to the printing medium in a first direction and print from the nozzle to the print head. The medium ejects ink droplets, and at the same time controls the curing device to irradiate ultraviolet rays to cure the ink droplets, so that the printing image of the printing medium on the printing platform is finished printing. In the second step, the control system controls the paper feeding mechanism along the first Convey the printing medium in the same direction as the length of the printing platform in the first direction, and move the printing carriage back to the beginning of printing. In the third step, repeat the first and second steps until installation. Printing on the paper feed mechanism Print quality is completed.

The present invention also provides a printing method of the inkjet printing device, wherein the printing method ejects ink droplets from a nozzle installed on the printing cart, and the printing method is provided on the printing cart. The curing devices at both ends irradiate the printing medium with ultraviolet rays to cure the ink droplets to realize printing. The printing cart moves back and forth relative to the printing medium in the first direction, and the printing cart The vertical third direction of the printing platform moves up and down relative to the printing medium; the printing method includes the following steps:

In a first step, the control system controls the printing cart to move back and forth relative to the printing medium in a first direction and ejects ink droplets from the nozzle to the printing medium, and at the same time controls the curing device to irradiate ultraviolet rays to cure the ink droplets;

In the second step, after the printing trolley is superimposed for multiple passes in the first direction relative to the printing medium, the third direction driving mechanism drives the printing trolley to rise in the third direction perpendicular to the printing platform;

In the third step, the first step and the second step are repeated until the printing image of the printing medium on the printing platform reaches the required three-dimensional effect.

The present invention also proposes another printing method of the above inkjet printing device, wherein the printing method ejects ink droplets from a nozzle installed on the printing cart, and the printing method is provided on the printing device. The curing devices at both ends of the trolley irradiate the printing medium with ultraviolet rays to cure the ink droplets to achieve printing. The bracket moves relative to the printing medium in the first direction to and fro relative to the printing medium. The second direction perpendicular to the first direction is stepwise moved relative to the print medium, and the print trolley is moved up and down relative to the print medium in a third direction perpendicular to the print platform; the print The method includes the following steps:

In a first step, the control system controls the printing cart to move back and forth relative to the printing medium in a first direction and ejects ink droplets from the nozzle to the printing medium, and at the same time controls the curing device to irradiate ultraviolet rays to cure the ink droplets;

In the second step, after the printing cart moves to the beginning of the first direction again, the control system controls the printing cart to move stepwise relative to the printing medium in a second direction perpendicular to the first direction;

The third step is to repeat the first and second steps until the print image reaches the required resolution, and then the print carriage returns to the print starting position in a second direction perpendicular to the first direction;

The fourth step is to repeat the first, second, and third steps until the print image is superimposed to a preset height, and the control system controls the print trolley to rise in the third direction;

Fifth step, repeat the first step, the second step, the third step, and the fourth step until the printed image on the printing medium on the printing platform reaches the desired three-dimensional effect.

Compared with the prior art inkjet printing device, the inkjet printing device of the present invention has the following advantages:

1. The inkjet printing device of the present invention is capable of realizing 3D three-dimensional effect printing by providing driving mechanisms of a first direction and a third direction to a printing cart.

2. The inkjet printing device of the present invention is provided with a printing platform on the basis of the onepass printer, which increases the range of use of the printer, and can not only print printing materials such as roll materials, but also print materials such as plates. Printing of objects.

3. The inkjet printing device of the present invention can increase the resolution of the printing pattern and improve the printing quality based on the accuracy of the original nozzle by setting the second direction driving mechanism to the printing cart.

4. The inkjet printing device of the present invention sets the second driving mechanism on a bracket installed with the printing cart to drive the printing cart to move in the second direction, so that the structure of the printing device is simple and the cost is reduced.

5. The printing cart in the inkjet printing device of the present invention can move in three directions. By controlling the combined movement of the printing cart, the printing platform, or the paper feeding mechanism, a variety of printing modes can be realized to make the printing device function. Comprehensive, increase competitiveness in this field.

The inkjet printing device and the inkjet printing method of the present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 1 and 2, the inkjet printing device in the present invention includes a first direction driving mechanism 1, a second direction driving mechanism 2, a third direction driving mechanism 3, a printing cart 4, and a printing platform 5. , Ink scraping maintenance device 6, paper feeding mechanism 7, and control system (not shown in the figure). The printing carriage 4 is installed above the printing platform 5, and the printing carriage 4 is equipped with a printing head including jetting magenta (M), yellow (Y), cyan (C) and black (K) inks. There is at least one print head for each color of ink. To increase the printing speed, multiple print heads can be used to print the same color ink. The print cart 4 of the present invention may further be provided with a print head that ejects white (W) ink and / or transparent (V) ink, and may also be provided with a print head for spot-color ink. The printing trolley 4 spans the width direction of the printing platform 5, and the overall printing width of the printing head is greater than or equal to the width of the printing objects arranged below. An ink cartridge for accommodating ink and a corresponding negative pressure control system may be provided on the printing cart 4. The ink used in the print head of the present invention is UV ink. A curing device 41 is installed at each of the two ends of the printing cart 4 for drying the ejected ink. The curing device of the present invention is composed of a plurality of LEDs for irradiating ultraviolet rays arranged in a second direction (Y-axis direction). The present invention can also install a curing device only at one end of the printing cart 4, such as A curing device is installed at the left end of the printing cart or a curing device is installed only at the right end of the printing cart. The irradiation intensity of the curing device can also be set in a smartly adjustable manner.

An ink-scraping maintenance device 6 is provided below the initial position of the printing cart 4. The ink-scraping maintenance device 6 is used to wipe the nozzles installed below the printing cart 4 to prevent the nozzle holes from being blocked; the printer stops working At this time, the ink-scraping maintenance device 6 can also perform moisturizing maintenance on the nozzle to prevent the ink from drying and solidifying in the nozzle hole, avoiding damage to the nozzle hole, and ensuring the printing quality.

The print cart 4 can be moved in three directions under the control of the control system, that is, the first direction is the X-axis direction in the figure (the X-axis direction is parallel to the direction of the first bracket 15), and the second direction is the Y-axis in the figure Direction (the X axis is perpendicular to the Y axis direction), and the third direction is the Y axis direction in the figure (that is, the height direction perpendicular to the printing platform 5). The movement of the printing cart 4 in three directions is controlled by the first direction driving mechanism 1, the second direction driving mechanism 2, and the third direction driving mechanism 3, respectively, as shown in FIG.

The first direction driving mechanism 1 includes a first energy chain 11, a first direction guide rail 12, a first direction slider 13, a first motor 14, and a first bracket 15. The control system controls the first motor 14 to drive the printing cart 4 to A substantially constant speed repeatedly moves in the first direction (X-axis direction). During the movement, the first-direction slider 13 installed below the print cart 4 cooperates with the first-direction guide rail 12 above the first bracket 15 to restrict the movement. Direction, in this embodiment, two first direction guide rails 12 are provided, which are respectively located at the front and back sides of the printing platform 5 in the width direction. The printing trolley 4 is installed across the two first direction guide rails 12 to print the trolleys. Two first-direction sliders 13 are respectively arranged on the lower end along the X-axis direction to cooperate with the first-direction guide rail 12. The first direction driving mechanism 1 further includes a first energy chain 11. The first energy chain 11 is mounted on an energy chain plate (not shown in the figure). The first energy chain 11 follows the printing trolley 4 in the first direction (X Axis direction) reciprocating motion. During the movement of the printing cart 4 in the first direction (X-axis direction), the control system also needs to control the nozzles below it to eject ink droplets onto the printing medium.

The second direction driving mechanism 2 includes a second energy chain 21, a second direction guide 22, a second direction slider 23, a second bracket 24, and a second motor (not shown in the figure). The control system can control the second motor driving The printing carriage 4 moves in the second direction (Y-axis direction). During the movement, the second direction slider 23 installed below the printing carriage 4 cooperates with the second direction guide 22 installed above the second bracket 24 to restrain Y In the direction of the axis movement, two second-direction guide rails 22 are provided in this embodiment, and two second-direction sliders 23 are respectively arranged on the two sides of the print carriage along the Y-axis direction to cooperate with the second-direction guide rails 22. The second towline 21 in the second direction driving mechanism 2 is installed on the towline plate (not shown in the figure), the towline plate has a groove structure, and the second towline 21 follows the second direction along with the printing trolley 4 (Y-axis) step motion. During the movement of the print cart 4 in the second direction (Y direction), the inkjet head does not eject ink droplets.

The third direction driving mechanism 3 includes a third motor 31 and a third direction air jack 32. The control system can control the third motor 31 to drive the printing cart 4 to move up and down in the third direction (Z-axis direction). This embodiment is provided Four third-direction gas jacks 32 are provided with four sets of optical axes and bearing seats (not shown in the figure) to restrict the Z-axis movement direction. The lifting device can also adopt other methods, as long as it can ensure that the printing trolley 4 moves vertically in the third direction (Z-axis direction). The third direction driving mechanism 3 can drive the printing cart 4 to vertically move in the third direction (Z-axis direction) to adjust the distance between the print head and the printing medium. In addition, it can also perform a slight height lifting operation for printing. 3D stereo effect with uneven texture.

The paper feeding mechanism 7 of the present invention includes a paper receiving mechanism 71, a paper discharging mechanism 72, a driving roller, and a plurality of guide rollers (not shown in the figure), and is located at the left and right ends of the printing platform 5 in the first direction (X-axis direction). A left guide roller and a right guide roller are respectively provided. When the printing medium is a roll material, the printing medium is installed on the paper discharging mechanism 72, and one end of the printing medium is wound around the printing platform 5 through a plurality of guide rollers. On the right guide roller at the right end of the printer, the printing medium is wound on the left guide roller at the left end of the print platform 5 across the entire printing platform 5, and then is wound on the delivery mechanism 71 via the driving roller and a plurality of guide rollers.

The printing platform 5 in the present invention is rectangular. The length of the printing platform in the first direction (X-axis direction) is longer than the length of the printing platform in the second direction (Y-axis direction). The paper feeding mechanism 7 of the present invention is continuous. Paper feeding or intermittent feeding. When intermittent feeding, after the printing medium on the printing platform finishes printing, the control system controls the paper feeding mechanism 7 for each feeding amount for the printing platform 5 in the first place. Length in the direction (X-axis direction).

When the printing medium is a plate material, the paper feeding mechanism 7 is not required to work, and the plate medium can be directly placed on the printing platform 5 for printing, and a supporting fixture can be set on the printing platform 5 to restrict the printing. Print media location. Automatic loading and unloading devices can also be installed along the second direction (Y-axis direction), ie, the front and back ends of the printing platform 5 in the width direction, to perform automatic loading and unloading operations on sheet printing media.

The printing cart 4 in the present invention has the following movement modes during printing: The printing cart 4 moves from one end (right end in the figure) in the first direction (X-axis direction) to the other end (in the figure) (Left end) and returning from the other end to the other end to move relative to the printing medium and eject ink. When the printing cart reciprocates and prints N times in the first direction (X-axis direction), the control system controls the printing The trolley 4 rises a small distance in the third direction (Z-axis direction), and then the printing trolley 4 continues to move from one end (right end in the figure) to the other end (left end in the figure) in the first direction (X-axis direction). And the printing is repeated N times from the other end to the end, and then the control system controls the printing trolley 4 to rise a small distance in the third direction (Z axis direction), and so on until the printing requirements are completed. This case is applied to the case of printing a concave-convex 3D three-dimensional effect and the print width of the print head in the second direction (Y-axis direction) covers the to-be-printed range of the print medium.

If the resolution is improved on the basis of the above printing method, a stepping motion of the printing cart 4 in the second direction (Y-axis direction) can be added: The printing cart 4 still starts from the first direction (X-axis direction) Move one end (the right end in the figure) to the other end (the left end in the figure) and return to the end from the other end to move relative to the print medium and eject the ink, and then print the cart 4 at one end (starting end). In the state, relative stepping motion (moving from back to front) is performed relative to the printing medium in the second direction (Y-axis direction), and then the printing trolley 4 continues from one end in the first direction (X-axis direction) (Figure Middle right end) Move to the other end (left end in the figure) and return to one end from the other end to move relative to the print medium and eject the ink. Repeat this way. After the required resolution is reached in this way, the print The car 4 returns to the original end along the second direction (Y-axis direction), and then continues to eject ink for the second time in this movement mode. This is repeated until N times are superimposed and printed, and the control system controls the print car 4 along the first Three directions (Z-axis direction) A small distance, then the printing trolley 4 moves from one end (right end in the figure) to the other end (left end in the figure) of the first direction (X-axis direction) again and returns to the other end from the other end and ejects ink, and then prints The carriage 4 moves stepwise (from the back to the front) relative to the printing medium in the second direction (Y-axis direction) with one end. In this way, the carriage 4 is printed again after printing N times. Raise a small distance along the third direction (Z-axis direction), and repeat this process. Finally, a high-resolution 3D stereoscopic effect image is printed.

When the printing medium is a roll material, the cooperation of the paper feeding mechanism 7 is required. The printing trolley 4 still performs the same movement as the printing method described above to print the image of the area of the printing platform 5 and then the paper feeding mechanism. 7 Convey the printing medium of the same length as the printing platform in the first direction, and the printing cart 4 performs the printing in the above manner again, and so on until the printing of the entire roll medium is completed.

When the 3D effect is not needed for printing, the third-direction driving mechanism 3 is only applied before printing, and the printing carriage 4 is driven to move up and down in the third direction (Z-axis direction) to adjust the plane of the print head and the printing medium. Distance to accommodate different thicknesses of print media. During the printing process, the software control program removes the control motion of the third direction driving mechanism 3 and the repeated superimposition process of the image.

The movement sequence of the printing cart 4 in the first direction and the second direction in the present invention can also be applied in the following manner: After the printing cart 4 is moved from one end to the other end in the first direction, the printing cart 4 In the state of the other end, relative movement is performed relative to the print medium in the second direction, and then the print cart 4 is moved from the other end to the print medium in one direction in the first direction. The other movement modes are unchanged.

In addition, the printing trolley 4 can also stop moving after being driven to a fixed position by the first-direction driving mechanism before printing, and the control system controls the roll-type printing medium below the printing trolley 4 to continue in the first direction. (X-axis direction) Movement at the same time controls the inkjet of the nozzles on the printing cart 4 to achieve one-pass printing, which is usually applied to printing of variable data.

FIG. 4 is a flowchart of a 3D three-dimensional printing method for an inkjet printing device according to the present invention. The method is applied to a roll-type printing medium. The inkjet printing method of the present invention includes ejecting ink droplets from a nozzle mounted on a printing trolley, and irradiating the printing medium with ultraviolet rays from a curing device provided at both ends of the printing trolley to cure the ink droplets to achieve printing, The printing cart 4 moves back and forth relative to the printing medium in a first direction (X-axis direction), and the printing cart moves up and down relative to the printing medium in a third direction (Z-axis direction) perpendicular to the printing platform. ; The inkjet printing method includes the following steps: Step S1, before the inkjet printing starts, the roll-type printing medium is installed above the printing platform 5 and placed on the entire paper feeding mechanism, that is, from the paper discharging mechanism 72 starts to pass through a plurality of guide rollers, and then passes around the printing platform 5 and then passes through the driving roller and the guide roller to the paper receiving mechanism 71. In the second step S2, by adjusting the third direction driving mechanism, the printing cart 4 is moved up and down in the third direction (Z-axis direction) so that the distance between the plane on which the nozzle is located on the printing cart and the printing medium is the most suitable. Printing distance, the most suitable printing distance in the field of inkjet printing is 2 ~ 3mm. In the third step S3, the control system controls the first direction driving mechanism 1 to drive the printing cart 4 along the first direction (X-axis direction) relative to the printing medium from one end (the right end of the printing platform) to the other end (printing The left end of the platform) reciprocates, sprays ink droplets from the print head to the printing medium, and irradiates ultraviolet rays in the self-curing device to cure the ink droplets. In this way, the ink droplets are repeatedly printed repeatedly to superimpose the ink droplets. The fourth step S4, when the ink droplets on the printing medium are superimposed to a preset height (or the number of times that the printing cart reciprocates reaches the preset number of programs), the third direction driving mechanism drives the printing cart 4 along the third direction ( Z axis direction) Rise minute distance (In this embodiment, the distance that the print carriage rises 0.2 mm in the third direction can be set after the print carriage reciprocates 10 times, and the actual situation needs to be determined based on ink measurement experiments). In a fifth step S5, the first-direction driving mechanism 1 continues to drive the printing cart 4 to reciprocate in the first direction (X-axis direction) to superimpose ink droplets, and the curing device irradiates ultraviolet rays to cure the ink droplets. The sixth step S6 is to judge whether the image of the printing medium on the printing platform is printed to the required height. If it is not printed to the required height, repeat the third step S3, the fourth step S4, the fifth step S5 and Step S6; if printing to the required height, perform step S7: the paper feed mechanism drives the printing medium to advance in the first direction (X-axis direction) and is equal to the length of the printing platform in the first direction (Or make the paper feed mechanism feed the next screen of print media in a first direction by a predetermined amount). The eighth step S8 is to determine whether the entire printing medium has finished printing the printed image. If it has been completed, it will directly end the printing. If it is not completed, it will jump to the second step S2 of the program to start until all the printing medium is printed. Printing is complete.

When it is not necessary to print a 3D effect roll-type printing medium, after executing S1-S2, in step S3, the control system only controls the printing cart 4 in the first direction (X-axis direction) relative to Spray ink droplets to print (round trip or round trip) from one end (the right end of the printing platform) to the other end (the left end of the printing platform), instead of superimposing the ink droplets repeatedly, then directly Go to step S7: the paper feeding mechanism drives the printing medium to advance in the first direction (X-axis direction) by a distance equal to the length of the printing platform in the first direction (or make the paper feeding mechanism in the first direction by a predetermined amount) Feed the next screen of print media), then continue to step S3, and so on, until all roll-type print media are printed.

When printing 3D stereo effect on sheet printing media, execute the printing steps as shown in Figure 5: Step S01 install sheet printing media above the printing platform, and then step S02- The six steps of S06 are the same as the printing method of steps S2-S6 above. When determining whether the image of the print medium on the printing platform is printed to the required height in step S06, if it is not printed to the required height, Repeat the same steps from step S03 to step S06; if the required height has been printed, go to step S07: unload this batch of sheet printing media and replace the next batch of sheets to be printed The medium can be loaded and unloaded manually when the medium is changed, or an automatic loading and unloading mechanism can be set for automatic loading and unloading. This loading and unloading mechanism is arranged in the second direction (Y-axis direction) to print the front and back of the platform width direction. On both sides, this embodiment does not limit this specific form. The eighth step S08 is to determine whether printing of all the media to be printed is completed. If all the printing has been completed, then the printing is directly terminated. If it is not completed, then the program jumps to step S01 to install a new sheet printing medium. Then continue to work according to the above steps, until printing of all sheet printing media is completed.

When it is not necessary to print a plate-like printing medium with 3D three-dimensional effect, after executing S01-S02, in step S03, the control system only controls the printing cart 4 in the first direction (X-axis direction) relative to the column During the round-trip process of the printing medium from one end (the right end of the printing platform) to the other end (the left end of the printing platform), the ink droplets are printed (repeatedly once or twice). After that, the material is unloaded and loaded manually or automatically, and then the control system continues to control the printing trolley 4 to print in the first direction (X-axis direction), and so on until all the printing materials of the plate type are printed. .

FIG. 6 is a flowchart of a printing method of a printing cart according to another embodiment of the present invention. The printing method is based on the above-mentioned basis to improve the resolution of the image. The moving method of the printing cart in this embodiment includes a first direction. Motion in the second direction, motion in the second direction, and motion in the third direction. The printing method specifically includes the following steps: First step S11, firstly adjusting the lifting movement of the printing cart in the third direction (Z-axis direction) by a third-direction driving mechanism, so that the plane where the nozzle on the printing cart is located and The distance between the printing media is suitable for printing. The most suitable printing distance in the field of inkjet printing is 2 ~ 3mm. In the second step S12, the first-direction driving mechanism drives the printing cart to move from one end to the other end in the first direction (X-axis direction), and then return to the original end. During the movement, the nozzle ejects ink droplets and the curing device moves Ink droplets are cured. In the third step S13, the driving mechanism of the second direction drives the printing cart to move stepwise in the second direction (Y-axis direction) (the stepping distance is determined according to the required printing resolution and software settings). The fourth step S14, the driving mechanism of the first direction drives the printing carriage to move from one end to the other end in the first direction (X-axis direction), and then returns to the original end. During the movement, the nozzle ejects ink and cures the device. The ink droplets are cured. The fifth step S15 is to determine whether the printing cart realizes the second direction step count preset by the software. If not, the third step S13, the fourth step S14, and the fifth step S15 are executed again; if so, the sixth step is executed. Step S16: The printing cart returns to the printing start position in the second direction (Y-axis direction). The seventh step S17 determines whether the image on the print medium is printed to a preset height. If not, the second step S12 to the seventh step S17 are performed again; if so, the eighth step S18 is performed: the third direction driving mechanism Drive the print cart to rise in the third direction (Z-axis direction) for a preset minute distance. The ninth step S19 determines whether the image on the printing medium is printed to the required height. If not, the process returns to step S12-ninth step S19; if so, the movement of the printing cart is ended. The movement of the printing medium is still differentiated according to the type of the coil and the plate. See the movement of the paper feeding mechanism in FIG. 4 or the method for installing the plate-type printing medium in FIG. 5. This flowchart does not limit this.

When the above-mentioned printing method does not need to print the 3D three-dimensional effect, only steps S11-S15 are performed. In step S15, it is determined whether the printing cart realizes the number of times of the second direction step preset by the software, and if not, re-execute. The third step S13, the fourth step S14, and the fifth step S15; if yes, refer to step S7 in FIG. 4 or step S07 in FIG. 5 to perform a new printing medium supply operation.

FIG. 7 is a flowchart of another printing method of the inkjet printing device according to the present invention. This method is used for rapid printing of one-time imaging of a roll-type printing medium, and includes ejecting ink droplets from a nozzle installed on a printing cart. And the curing device provided at the two ends of the printing cart irradiates the printing medium with ultraviolet rays to cure the ink droplets to achieve printing, and the first direction driving mechanism drives the printing cart to be fixed at a position directly above the printing platform During the printing process, the printing cart remains stationary, and the paper feeding mechanism supplies the printing medium at a constant speed in the first direction. The printing method includes the following steps: in step S001, the first-direction driving mechanism drives the printing cart to move from one end to the position directly above the printing platform in the first direction (X-axis direction), and stops at a predetermined position; In the second step S002, by adjusting the third direction driving mechanism, the distance between the plane where the nozzle of the nozzle is located and the printing medium is adapted to the printing distance; in the third step S003, the paper feeding mechanism is controlled to drive the roll-type printing medium from The paper-feeding end is moved to the paper-receiving end, that is, the printing medium is supplied at a constant speed, and ink droplets are ejected from the nozzle during the movement of the printing medium, and the curing device is irradiated with ultraviolet rays to cure the ink droplets; the fourth step S004, It is judged whether the printing image is printed. If it is completed, the printing is directly ended. If it is not completed, the third step S003 is repeated until printing is completed.

It should be noted that any modification made according to the specific embodiments of the present invention does not depart from the spirit of the present invention and the scope described in the claims.

1‧‧‧ first direction drive mechanism

2‧‧‧Second direction drive mechanism

3‧‧‧Third direction drive mechanism

4‧‧‧print car

5‧‧‧printing platform

6‧‧‧ Ink scraping maintenance device

7‧‧‧paper feeding mechanism

11‧‧‧The first towline

12‧‧‧First direction guide

13‧‧‧First direction slider

14‧‧‧First Motor

15‧‧‧First bracket

21‧‧‧Second towline

22‧‧‧Second direction guide

23‧‧‧Second direction slider

24‧‧‧Second bracket

31‧‧‧Third Motor

32‧‧‧Third direction gas jack

41‧‧‧curing device

71‧‧‧paper delivery mechanism

72‧‧‧ Paper release mechanism

1 is a perspective view of an inkjet printing device according to an embodiment of the present invention;

2 is a left side view of an inkjet printing device according to an embodiment of the present invention;

3 is a schematic diagram of relative movement of a printing trolley according to the present invention;

4 is a flowchart of an inkjet printing method for printing a 3D three-dimensional effect according to an embodiment of the present invention;

5 is a flowchart of an inkjet printing method for printing a 3D three-dimensional effect in another embodiment of the present invention;

6 is a flowchart of a printing method according to another embodiment of the present invention;

FIG. 7 is a flowchart of a printing method according to another embodiment of the present invention.

Claims (10)

An inkjet printing device includes: a printing trolley, at least one printing nozzle is installed on the printing trolley, and a printing width of the printing nozzle is greater than or equal to a width of a printing medium disposed below; A curing device is installed at both ends of the car; a first-direction driving mechanism is used to install a printing cart and control the printing cart to move back and forth in the first direction; a printing platform, and printing is arranged above the printing platform Medium; a third-direction driving mechanism that controls the printing trolley to move up and down in a third direction perpendicular to the printing platform; a paper-feeding mechanism that includes a paper-receiving mechanism, a paper-receiving mechanism, a driving roller, and A guide roller is provided with a left guide roller and a right guide roller respectively at the left and right ends of the printing platform along the first direction; a control system that controls the printing cart, the paper feeding mechanism, and the printing platform. The operations of the first direction driving mechanism, the third direction driving mechanism, and the print head. The inkjet printing device according to item 1 of the scope of patent application, wherein the paper feeding mechanism conveys a printing medium in the first direction. The inkjet printing device according to item 1 of the scope of patent application, further comprising a second direction driving mechanism, the second direction driving mechanism is connected to the printing carriage through a bracket, and controls the printing carriage. The vehicle moves stepwise along a second direction that is perpendicular to the first direction to improve the resolution of the printed image. The inkjet printing device according to item 1 of the scope of patent application, wherein the first direction driving mechanism includes a first energy chain, a first direction guide, a first direction slider, a first motor, and a first The support, the control system controls the first motor to drive the printing cart to move in the first direction. During the movement, the first direction slider installed below the printing cart cooperates with the first direction guide rail above the first support to restrict the moving direction. The inkjet printing device according to item 4 of the scope of patent application, wherein the first direction guide rail is provided at each of the upper and lower ends of the printing platform, and the bottom surface of the printing trolley is installed across the two On the root guide rails, two slide rails are arranged in cooperation with each other. The inkjet printing device according to any one of claims 1 to 5, wherein the printing cart is driven by a first-direction driving mechanism so as to be opposite to the first direction with respect to the first direction. The printing medium is reciprocated and ink droplets are ejected by the nozzles. After superimposing printing multiple times, the third-direction driving mechanism drives the printing trolley to rise in the third direction perpendicular to the printing platform, and then the control system continues to control the printing. The trolley prints back and forth in the first direction. The inkjet printing device according to any one of claims 1 to 5, wherein the printing cart is driven by a first-direction driving mechanism so as to be opposite to the first direction with respect to the first direction. The print medium is reciprocated and ink droplets are ejected by the print head. The print carriage is moved to the starting end in the first direction again and is driven by the second direction driving mechanism to step relative to the print medium from the second direction. Move, and then the print carriage continues to reciprocate in the first direction and ink droplets are ejected by the nozzles. After repeated printing multiple times in this way, the third direction driving mechanism drives the print carriage to be perpendicular to the printing platform. The third direction rises, and then the control system continues to control the printing cart to cooperate with the movement in the first direction and the second direction to perform superimposed printing. A printing method of the inkjet printing device according to item 1 of the scope of the patent application, wherein the printing method ejects ink droplets from a nozzle installed on the printing cart, and is provided by The curing device on the printing cart irradiates the printing medium with ultraviolet rays to cure the ink droplets to achieve printing. The printing cart moves back and forth relative to the printing medium in the first direction, and the paper feed The mechanism indirectly conveys the printing medium in the first direction; the printing method includes the following steps: in the first step, the control system controls the printing cart to move back and forth relative to the printing medium in the first direction and automatically The nozzle ejects ink droplets to the printing medium, and at the same time controls the curing device to irradiate ultraviolet rays to cure the ink droplets, so that the printing image of the printing medium on the printing platform is printed; in the second step, the control system controls the paper feeding The mechanism conveys the printing medium of the same length as the length of the printing platform in the first direction along the first direction, and at the same time, the printing carriage moves back to the printing end; the third step repeats the first step 2. The second step is until the paper feed Printing of the print media on the mechanism is complete. A printing method for an inkjet printing device according to any one of claims 1 to 5, wherein the printing method is a method in which ink droplets are ejected from a nozzle mounted on the printing cart. And the curing device provided at both ends of the printing trolley irradiates ultraviolet rays to the printing medium to solidify the ink droplets so as to realize printing, and the printing trolley carries back and forth with respect to the printing medium in the first direction Moving, the printing trolley moves up and down relative to the printing medium in a third direction perpendicular to the printing platform; the printing method includes the following steps: the first step is a control system controlling the printing The carriage moves back and forth relative to the printing medium in the first direction and sprays ink droplets from the nozzle to the printing medium, and at the same time controls the curing device to irradiate ultraviolet rays to cure the ink droplets; in the second step, the printing carriage is in the first direction After multiple rounds of overlapping printing with respect to the printing medium, the third direction driving mechanism drives the printing trolley to rise in the third direction perpendicular to the printing platform; the third step is to repeat the first step and the second step until Print on the printing platform Print image quality to achieve the desired stereoscopic effect. A printing method for an inkjet printing device according to any one of claims 1 to 5, wherein the printing method is a method in which ink droplets are ejected from a nozzle mounted on the printing cart. And the curing device provided at both ends of the printing trolley irradiates ultraviolet rays to the printing medium to cure the ink droplets to realize printing, and the printing trolley is opposite to the printing medium in the first direction. Moving back and forth, the printing trolley also moves stepwise relative to the printing medium in a second direction that is perpendicular to the first direction, and the printing trolley is in a third direction that is perpendicular to the printing platform Lifting and moving relative to the printing medium; the printing method includes the following steps: in the first step, the control system controls the printing cart to move back and forth relative to the printing medium in a first direction and from the print head to The printing medium sprays ink droplets, and at the same time controls the curing device to irradiate ultraviolet rays to cure the ink droplets. In the second step, after the printing carriage moves to the beginning of the first direction again, the control system controls the printing carriage along Vertical second direction Step-by-step movement on the printing medium; the third step is to repeat the first step and the second step until the print image reaches the required resolution, and then the print carriage returns in a second direction perpendicular to the first direction Step 4: Repeat the first, second, and third steps until the print image is superimposed to the preset height. The control system controls the print trolley to rise in the third direction. Five steps, repeat steps 1, 2, 3, and 4 until the print image on the print medium on the print platform reaches the desired three-dimensional effect.