TW201738071A - Ink jet printing apparatus and ink jet printing method - Google Patents

Abstract

The present invention provides an ink jet printing apparatus which includes a printing carriage with one or multiple print heads, and the total printing width of print heads is greater than or equal to the width of the printing media placed under the said print heads; the first direction drive mechanism which installs the said printing carriage and controls the printing carriage to move horizontally forward (left) and backward (right) along the first direction; the third direction drive mechanism which controls the printing carriage to move vertically along the third direction; a printing platen on which the printing media is placed; a control system which controls the printing carriage to move and controls the first and third direction drive mechanism and print heads to work. The present invention provides a multi-functions ink jet printing apparatus which can process scanning, one-pass and 3D printing through the control system. Also the said printing can be applied to printing high resolution images on a variety of printing 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 three-dimensional printing effects of various printing media such as plate materials and coil materials.

The ink jet printing technique 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, which has the advantages of fast printing speed, low pollution, and can adapt to various printing media, and is widely used in industrial applications. Inkjet printing is divided into two types: scanning (Scanning) inkjet printing and one-feeding inkjet printing (Onepass) inkjet printing according to the movement mode of the printing carriage and the printing medium. The scanning inkjet printing includes a roll. There are two types of roll-on-line inkjet printing and flat-top inkjet printing, in which the roll-to-roll type inkjet printing process prints back and forth along the rail beam relative to the printing medium during the inkjet printing process, and prints the medium. Stepping motion in a direction perpendicular to the direction of movement of the printing carriage, the rail beam of the printing carriage is stationary; and the platform type inkjet printing has two cases in the inkjet printing process, one is in the inkjet During the printing process, the rail beam does not move, the printing carriage moves back and forth along the rail beam, and the printing platform moves in a direction perpendicular to the moving direction of the printing carriage; there is also a printing platform that is stationary and prints the trolley. Moving along the rail beam relative to the printing medium, and the rail beam is stepped in a direction perpendicular to the rail beam to drive the printing carriage to move in a direction perpendicular to the rail beam. And one-pass inkjet printing (Onepass) inkjet printing in the inkjet process, the printing carriage is stationary, and the printing medium moves in one direction and high speed. The printing accuracy and the printing width of the nozzle are required to be high by the one-feed imaging inkjet printing. The printing precision of the nozzle needs to be the printing precision of the image, and the printing width of the nozzle needs to be the printing of the image. Width, of course, can be achieved by inserting the nozzle to obtain high precision and by connecting the nozzles to obtain a wider printing width, but this inevitably increases the number of nozzles, whether using high-precision nozzles or The high print accuracy of the nozzles inevitably increases the cost of the printer.

In a one-pass inkjet printing process, a pattern having a 3D stereoscopic effect cannot be printed due to one pass of the printing medium, and the conventional one-pass inkjet printing device only uses The printing medium is printed on the coil material, and the printing medium of the sheet material cannot be printed. Of course, the printing medium of the sheet material cannot be printed in a 3D stereoscopic effect.

At the same time, Onepass inkjet printing has limitations in terms of print resolution. If you want to improve the print quality, you can only replace expensive expensive high-resolution nozzles, thus increasing manufacturing costs. .

In view of the problems existing in the prior art, an object of the present invention is to provide an ink jet printing apparatus which is versatile, high-resolution, and particularly suitable for printing a plurality of printing media (coil or sheet).

In order to achieve the object, the present invention provides an inkjet printing device, comprising: a printing carriage, wherein at least one printing nozzle is mounted on the printing carriage, and the printing width of the printing nozzle is greater than or equal to that disposed below. Print the width of the medium, print the curing device at one or both ends of the trolley; a first direction driving mechanism for installing the printing carriage, and controlling the printing carriage to reciprocate in the first direction; a driving mechanism for controlling the lifting movement of the printing carriage in the third direction; a printing platform on which the printing medium is disposed above the printing platform; and a control system, the control system controls the printing carriage The operation of the first direction drive mechanism, the third direction drive mechanism, and the print head.

The ink jet printing device further includes a paper feed mechanism that transports the print medium in the first direction.

The inkjet printing device further includes a second direction driving mechanism, wherein the second direction driving mechanism is connected to the printing carriage through the bracket, and controls the printing carriage to follow 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 comprises a first drag chain, a first direction rail, a first direction slider, a first motor and a first bracket, and the control system controls the first motor to drive the printing small The vehicle moves in the first direction, and the first direction slider installed under the printing carriage during the movement cooperates with the first direction rail above the first bracket to restrain the movement direction. In the above inkjet printing device, the first direction guide rail is disposed at each of the front and rear ends of the printing platform, and the bottom surface of the printing carriage is mounted on the two rails, and each of the rails is provided with two slides. Piece.

In the above inkjet printing device, the carriage is driven by the first direction driving mechanism to reciprocate from the printing medium in the first direction and eject ink droplets from the head, and to superimpose and print the printing Thereafter, the third direction driving mechanism drives the printing carriage to rise in a third direction perpendicular to the printing platform, and then the control system continues to control the printing carriage to reciprocally print in the first direction.

In the above ink jet printing apparatus, the printing carriage is driven by the first direction driving mechanism to reciprocate from the printing medium in the first direction and eject ink droplets by the head, the printing small After the vehicle moves to the start end in the first direction again, it is driven by the second direction driving mechanism to perform stepwise movement with respect to the printing medium from the second direction, and then the printing carriage continues from the first direction. Reciprocating motion and ejecting ink droplets by the nozzle, after repeatedly superimposing the printing, the third direction driving mechanism drives the printing carriage to rise in a 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 superimposition printing.

The inkjet printing device further includes a loading and unloading device disposed at the front and rear ends of the printing platform for automatically loading and unloading the plate printing medium.

The present invention provides a printing method for the above-described inkjet printing device, characterized in that the printing method ejects ink droplets from a nozzle mounted on the printing carriage, and is disposed on the printing carriage The curing device irradiates the printing medium with ultraviolet rays to solidify the ink droplets to perform printing, and the printing carriage moves back and forth relative to the printing medium along the first direction, the paper feeding mechanism along the first Directionally conveying the printing medium; the printing method comprises the following steps: First, the control system controls the printing carriage to reciprocate relative to the printing medium in the first direction and prints from the nozzle The medium ejects the ink droplets, and simultaneously controls the curing device to irradiate the ultraviolet rays to solidify 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 mechanism along the first Directionally conveying the same amount of printing medium as the length of the printing platform in the first direction, and simultaneously printing the carriage movement back to the printing start end; in the third step, repeating the first step and the second step until the installation Printing on the paper feeding mechanism Print quality is completed.

The present invention also provides a printing method of the above-described inkjet printing device, characterized in that the printing method ejects ink droplets from a nozzle mounted on the printing carriage, and is disposed on the printing carriage The curing device at both ends irradiates the printing medium with ultraviolet rays to cure the ink droplets, and the printing carriage reciprocates along the first direction with respect to the printing medium, and the printing carriage moves along the same The third direction perpendicular to the printing platform is moved up and down with respect to the printing medium; the printing method comprises the following steps:

In a first step, the control system controls the printing carriage to reciprocate relative to the printing medium in a first direction and ejects ink droplets from the nozzle to the printing medium, and controls the curing device to irradiate the ultraviolet rays to solidify the ink droplets;

In the second step, after the printing carriage is superimposed and printed in the first direction with respect to the printing medium, the third direction driving mechanism drives the printing carriage to rise in a third direction perpendicular to the printing platform;

In the third step, the first step and the second step are repeated until the printed image of the printing medium on the printing platform achieves the desired stereoscopic effect.

The present invention also provides another printing method of the above ink jet printing apparatus, characterized in that the printing method ejects ink droplets from a head mounted on the printing carriage, and is disposed on the printing The curing device at both ends of the trolley irradiates ultraviolet light to the printing medium to cure the ink droplets, and the carriage is relatively reciprocated relative to the printing medium in the first direction, the printing carriage along the a second direction perpendicular to the first direction is stepwise moved relative to the printing medium, the printing carriage moving up and down relative to the printing medium in a third direction perpendicular to the printing platform; the printing The method includes the following steps:

In a first step, the control system controls the printing carriage to reciprocate relative to the printing medium in a first direction and ejects ink droplets from the nozzle to the printing medium, and controls the curing device to irradiate the ultraviolet rays to solidify the ink droplets;

In the second step, after the printing carriage moves to the starting end of the first direction again, the control system controls the printing carriage to perform stepwise movement with respect to the printing medium in a second direction perpendicular to the first direction;

In the third step, the first step and the second step are repeated until the printed image reaches the required resolution, and then the printing carriage returns to the printing start position in a second direction perpendicular to the first direction;

In the fourth step, the first step, the second step and the third step are repeated until the print image is superimposed to a preset height, and the control system controls the printing carriage to rise in the third direction;

In the fifth step, the first step, the second step, the third step and the fourth step are repeated until the printed image of the printed medium on the printing platform achieves the desired stereoscopic effect.

The ink jet printing apparatus of the present invention has the following advantages over the prior art ink jet printing apparatus:

1. The ink jet printing apparatus of the present invention enables a 3D stereoscopic effect printing by providing a driving mechanism for the printing carriage in the first direction and the third direction.

2. The inkjet printing device of the invention sets the printing platform on the basis of the onepass printer, and increases the use range of the printer, not only can print the printed matter of the coil type, but also print the plate type. The print job of the object.

3. The inkjet printing device of the present invention can increase the resolution of the printing pattern and improve the printing quality by setting the second direction driving mechanism to the printing carriage.

4. The inkjet printing apparatus of the present invention drives the printing carriage to move in the second direction by disposing the second driving mechanism on the bracket on which the printing carriage is mounted, so that the structure of the printing apparatus is simple and the cost is reduced.

5. The printing carriage in the inkjet printing device of the invention can move in three directions, and realizes various printing modes by controlling the combined movement of the printing carriage, the printing platform or the paper feeding mechanism, so that the printing device functions. Comprehensive, increasing competitiveness in this field.

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

As shown in FIGS. 1 and 2, the inkjet printing apparatus of the present invention includes a first direction driving mechanism 1, a second direction driving mechanism 2, a third direction driving mechanism 3, a printing carriage 4, and a printing platform 5. The ink wiping maintenance device 6, the paper feeding mechanism 7, and the control system (not shown). The printing carriage 4 is mounted above the printing platform 5, and the printing carriage including the printing nozzles for ejecting magenta (M), yellow (Y), cyan (C) and black (K) inks is mounted on the printing carriage 4. There is at least one nozzle for each color ink. To improve the printing speed, multiple nozzles can be used to print the same color ink. A printing head that ejects white (W) ink and/or transparent color (V) ink may also be disposed on the printing carriage 4 of the present invention, and a printing head of the spot color ink may also be provided. The printing carriage 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 object disposed below. An ink cartridge for accommodating ink and a corresponding negative pressure control system can be disposed on the printing carriage 4. The ink used in the printing head of the present invention is UV ink. A curing device 41 is attached to each end of the printing carriage 4 for drying the discharged ink. The curing device of the present invention is composed of a plurality of LEDs for illuminating ultraviolet rays arranged in the second direction (Y-axis direction), and the present invention can also mount a curing device only at one end of the printing carriage 4, such as only in the column. A curing device is attached to the left end of the printing cart or a curing device is installed only at the right end of the printing cart. The illumination intensity of the curing device can also be set to a smartly adjustable manner.

A squeegee maintenance device 6 is disposed under the initial position of the printing carriage 4, and the squeegee maintenance device 6 is used for wiping the nozzle mounted under the printing carriage 4 to prevent the nozzle from being blocked; the printer stops working. At the same time, the ink wiping maintenance device 6 can also perform moisturizing maintenance on the nozzle to prevent the ink from solidifying in the nozzle hole, thereby avoiding damage to the nozzle hole and ensuring the quality of the inkjet printing.

The printing carriage 4 can perform movement 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. The direction (the X-axis is perpendicular to the Y-axis direction), and the third direction is the Z-axis direction in the drawing (ie, the height direction perpendicular to the printing platform 5). The movement of the printing carriage 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 drag chain 11, a first direction guide rail 12, a first direction slider 13, a first motor 14 and a first bracket 15, and the control system controls the first motor 14 to drive the printing carriage 4 to A substantially constant speed is repeatedly moved in the first direction (X-axis direction), and the first direction slider 13 mounted under the printing carriage 4 cooperates with the first direction rail 12 above the first bracket 15 during the movement to restrain the movement. In the present embodiment, two first directional guide rails 12 are disposed at positions on the front and rear sides of the printing platform 5 in the width direction, and the printing carriage 4 is mounted across the two first directional guide rails 12 to print the trolley. The lower end is provided with two first direction sliders 13 respectively disposed on both sides of the X-axis direction to cooperate with the first direction guide rail 12. The first direction driving mechanism 1 further includes a first drag chain 11 mounted on the drag chain plate (not shown), and the first drag chain 11 follows the printing carriage 4 in the first direction (X Axis direction) reciprocating motion. During the movement of the printing carriage 4 in the first direction (X-axis direction), the control system also controls the nozzle below it to eject ink droplets onto the printing medium.

The second direction driving mechanism 2 includes a second drag chain 21, a second direction rail 22, a second direction slider 23, a second bracket 24 and a second motor (not shown), and the control system can control the second motor drive. The printing carriage 4 moves in the second direction (Y-axis direction), and the second direction slider 23 mounted under the printing carriage 4 cooperates with the second direction rail 22 mounted above the second bracket 24 during the movement to restrain the Y In the embodiment, two second direction guide rails 22 are disposed in the embodiment, and two second direction sliders 23 are respectively disposed on the two sides of the printing carriage along the Y-axis direction to cooperate with the second direction guide rails 22. The second drag chain 21 in the second direction driving mechanism 2 is mounted on the drag chain plate (not shown), the drag chain plate is a groove structure, and the second drag chain 21 follows the printing carriage 4 in the second direction. (Y axis) stepping motion. The head does not eject ink droplets during the movement of the printing carriage 4 in the second direction (Y direction).

The third direction driving mechanism 3 includes a third motor 31 and a third direction air ejector lever 32. The control system can control the third motor 31 to drive the printing carriage 4 to move up and down in the third direction (Z-axis direction), which is set in this embodiment. Four third-direction air ejector pins 32 are provided with four sets of optical axes and bearing housings (not shown) to constrain the Z-axis movement direction. The lifting device can also take other measures as long as the vertical movement of the printing carriage 4 in the third direction (Z-axis direction) can be ensured. The third direction driving mechanism 3 can drive the printing carriage 4 to vertically move up and down in the third direction (Z-axis direction) to adjust the distance between the head and the printing medium, and can also perform a slight height lifting operation for printing. 3D stereo effect with a textured texture.

The paper feed mechanism 7 of the present invention includes a paper take-up mechanism 71, a paper discharge mechanism 72, a drive roller, and a plurality of guide rollers (not shown), which are printed on the left and right ends of the platform 5 in the first direction (X-axis direction). A left guiding roller and a right guiding roller are respectively disposed. When the printing medium is a coil material, the printing medium is mounted on the paper feeding mechanism 72, and one end of the printing medium is wound around the printing platform through a plurality of guiding rollers. On the right guide roller at the right end, the printing medium is wound around the entire printing platform 5 around the left guide roller at the left end of the printing platform 5, and then wound around the pickup mechanism 71 via the driving roller and the plurality of guide rollers.

The printing platform 5 in the present invention has a rectangular shape, and the length of the printing platform in the first direction (X-axis direction) is larger than the length of the printing platform in the second direction (Y-axis direction), and the paper feeding mechanism 7 of the present invention is continuous. Feeding or intermittent feeding, when intermittent printing, after the printing medium to be placed on the printing platform is printed, the control system controls the paper feeding mechanism 7 to feed the amount of printing platform 5 at the first time. The length in the direction (X-axis direction).

When the printing medium is a sheet material, the paper feeding mechanism 7 is not required to work, and the sheet medium can be directly placed on the printing platform 5 for printing, and the matching fixture can be disposed on the printing platform 5 to constrain the column. The location of the printed media. The automatic loading and unloading device can be arranged along the second direction (Y-axis direction), that is, the front and rear ends of the printing platform 5 in the width direction, to perform automatic loading and unloading operation on the plate-type printing medium.

The printing carriage 4 of the present invention has the following movement modes during the printing process: the printing carriage 4 moves from one end (the right end in the drawing) from the first direction (the X-axis direction) to the other end (in the figure) The left end) and the return from one end to the end are relatively moved relative to the printing medium and eject the ink. When the printing carriage reciprocally superimposes the printing N times in the first direction (X-axis direction), the control system controls the printing. The trolley 4 is raised by a slight distance in the third direction (Z-axis direction), and then the carriage 4 continues to move from one end (the right end in the drawing) from the first direction (the right end in the drawing) to the other end (the left end in the figure). And the method of returning to the one end from the other end is reciprocally superimposed and printed N times, and then the control system controls the printing carriage 4 to rise a small distance in the third direction (Z-axis direction), and thus repeats until the printing requirement is completed. This case is applied to the case where the uneven 3D effect is printed and the head prints the width in the second direction (Y-axis direction) to cover the printing medium to be printed.

If the resolution is improved based on the above printing method, the stepping motion of the printing carriage 4 in the second direction (Y-axis direction) can be added: printing the trolley 4 or first from the first direction (X-axis direction) One end (right end in the figure) moves to the other end (left end in the figure) and returns to the one end from the other end to move relative to the printing medium and ejects ink, and then prints the carriage 4 at one end (starting end) In the state, the relative stepping motion (moving from the back to the front) is performed in the second direction (the Y-axis direction) with respect to the printing medium, and then the printing carriage 4 continues to end from the first direction (the X-axis direction) (Fig. The middle right end) moves to the other end (the left end in the figure) and returns to the one end from the other end to move relative to the printing medium and ejects the ink, so that after the desired resolution is achieved in this way, the printing is small. The car 4 returns to the initial end in the second direction (Y-axis direction), and then continues to eject the ink for the second time in this motion mode, and so on, until the superimposition prints N times, the control system controls the printing carriage 4 along the first Three directions (Z-axis direction) rise A small distance, then print the carriage 4 to move from one end (the right end in the figure) from the first direction (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 and eject the ink, and then print The carriage 4 moves in a second direction (Y-axis direction) with respect to the printing medium in a state of one end (moving from the back to the front), in this manner, until the superimposition is printed N times, the carriage 4 is printed again. A slight distance is raised in the third direction (Z-axis direction), and thus repeated, a high-resolution concave-convex 3D stereoscopic effect image is finally printed.

When the printing medium is a coil type, the cooperation of the paper feeding mechanism 7 is required, and the printing carriage 4 still performs the same movement as the above printing method to perform image printing on the printing platform 5 area, and then the paper feeding mechanism 7 transporting the same amount of printing medium as the length of the printing platform in the first direction, printing the carriage 4 and printing again in the above manner, and repeating until the entire web media is printed.

When the 3D effect is not required to be printed, the third direction driving mechanism 3 is only applied before the printing, and the driving printing carriage 4 is moved up and down in the third direction (Z-axis direction) to adjust the plane of the printing head and the printing medium. The distance between them is adapted to the printing medium of different thicknesses. In 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 order of movement of the printing carriage 4 in the first direction and the second direction in the present invention can also be applied in the following manner: the printing carriage 4 is moved from one end in the first direction to the other end, and the carriage 4 is printed. In the other end state, relative movement is performed with respect to the printing medium in the second direction, and then the printing carriage 4 is moved from the other end to the printing medium to the one end in the first direction. Other sports are unchanged.

In addition, the printing carriage 4 can also be no longer moved after being driven by the first direction driving mechanism to a fixed position before printing, and the control system controls the web printing medium under the printing carriage 4 to continuously follow the first direction. (X-axis direction) movement simultaneously controls the ejection of the head on the printing carriage 4, and realizes one-pass printing, which is usually applied to the printing of variable data.

4 is a flow chart of a 3D stereoscopic printing method of the ink jet printing apparatus of the present invention, which is applied to a web-type printing medium. The inkjet printing method of the present invention comprises ejecting ink droplets from a nozzle mounted on a printing carriage, and irradiating ultraviolet light to the printing medium by a curing device disposed at both ends of the printing carriage to solidify the ink droplets for printing. The printing carriage 4 reciprocates relative to the printing medium in the first direction (X-axis direction), and the printing carriage 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 comprises the following steps: First step S1, before the inkjet printing starts, the mounting of the web-type printing medium passes over the printing platform 5 and is placed on the entire paper feeding mechanism, that is, from the paper feeding mechanism. 72 begins to pass through a plurality of guide rollers, bypasses the printing platform 5, and is wound onto the delivery mechanism 71 via the driving roller and the guiding roller. In the second step S2, the printing carriage 4 is moved up and down in the third direction (Z-axis direction) by adjusting the third-direction driving mechanism to make the distance between the plane of the nozzle on the printing carriage and the printing medium optimum. The distance printed, the most suitable distance for printing in the inkjet printing field is 2~3mm. In the third step S3, the control system controls the first direction driving mechanism 1 to drive the printing carriage 4 in the first direction (X-axis direction) from the one end (the right end of the printing platform) to the other end in the first direction (X-axis direction) (printing The left end of the platform reciprocates, and the ink droplets are ejected from the printing head to the printing medium, and the ink droplets are solidified by irradiating the ultraviolet rays in the self-curing device, so that the ink droplets are superimposed repeatedly by reciprocating printing. In the fourth step S4, when the ink drops on the printing medium are superimposed to the preset height (or the number of times the printing carriage returns to the preset number of times), the third direction driving mechanism drives the printing carriage 4 in the third direction ( The Z-axis direction is increased by a small distance (in this embodiment, the printing carriage can be set to reciprocate 10 times and then the carriage is increased by 0.2 mm in the third direction, and the actual situation needs to be determined according to the ink measurement experiment). In the fifth step S5, the first direction driving mechanism 1 continues to drive the printing carriage 4 to reciprocate in the first direction (X-axis direction) to superimpose the ink droplets, and the curing device irradiates the ultraviolet rays to solidify the ink droplets. In the sixth step S6, it is determined whether the image of the printing medium on the printing platform is printed to the required height. If not printed to the required height, repeating the third step S3, the fourth step S4, the fifth step S5 and The sixth step S6; if it has been printed to the required height, perform the seventh step S7: the paper feeding mechanism drives the printing medium to advance in the first direction (X-axis direction) and the length of the printing platform in the first direction. The distance (or the paper feed mechanism feeds the next screen print medium in a first direction by a predetermined amount). In the eighth step S8, it is judged whether the printing of the printing medium is completed by the entire printing medium, and if it is completed, the printing is directly ended. If not, the processing jumps to the second step S2 of the program until all the printing media are listed. Printing is complete.

When it is not necessary to print the 3D stereoscopic roll-type printing medium, after performing S1-S2, in the S3 step, the control system only controls the printing carriage 4 in the first direction (X-axis direction) relative to The printing medium ejects ink droplets from one end (the right end of the printing platform) to the other end (the left end of the printing platform) during the round-trip process (round-trip one or two passes), no longer repeating the ink droplets, and then directly Step S7: the paper feeding mechanism drives the printing medium to advance in the first direction (X-axis direction) by the same amount as the length of the printing platform in the first direction (or causes the paper feeding mechanism to follow the first direction by a predetermined amount) Feeding the next screen print medium), then proceeding to step S3, and repeating until all the web-type print media is printed.

When the printing 3D stereo effect is applied to the sheet printing medium, the printing step shown in FIG. 5 is performed: the first step S01 installs the sheet printing medium above the printing platform, and then the second step S02- The six-step S06 is the same as the printing method of the above steps S2-S6. In the sixth step S06, it is determined whether the image of the printing medium on the printing platform is printed to the desired height, if not printed to the required height, The third step S03 to the sixth step S06 are also repeated; if the printing has been performed to the required height, the seventh step S07 is executed: the printing medium of the batch of the sheet is unloaded, and the next batch of the to-be-printed sheet is replaced. The medium may be manually loaded or unloaded when the medium is replaced, or an automatic loading mechanism and a discharging mechanism may be provided for automatic loading and unloading. The loading and unloading mechanism is disposed before and after printing the width direction of the platform in the second direction (Y-axis direction). On both sides, this embodiment does not limit this specific form. In the eighth step S08, it is determined whether all the print media to be printed is completed. If all the prints have been completed, the printing is directly ended. If not, the process returns to the first step S01 to install a new plate printing medium. Continue to work as described above until all sheet metal print media is printed.

When it is not necessary to print the sheet-type printing medium of the 3D stereo effect, after executing S01-S02, in the step S03, the control system controls only the printing carriage 4 in the first direction (X-axis direction) relative to the column. The printing medium ejects ink droplet printing (round-trip one or two times) from the one end (the right end of the printing platform) to the other end (the left end of the printing platform), and the ink droplets are not repeatedly superimposed and the printing is completed. After that, the material is unloaded and loaded by manual or automatic means, and then the control system continues to control the printing carriage 4 to print in the first direction (X-axis direction), and so on, until all the printing materials of the plate type are printed. .

6 is a flow chart of a printing method of a printing carriage according to still another embodiment of the present invention. The printing method is based on the above-mentioned basis to improve the resolution of an image. The printing mode of the printing carriage of this embodiment includes a first direction. Movement, movement in the second direction, and movement in the third direction. The printing method specifically includes the following steps: First step S11, firstly, the third direction driving mechanism is used to adjust the lifting movement of the printing carriage in the third direction (Z-axis direction), so that the plane of the nozzle on the printing carriage is The distance between the printing media is the distance suitable for printing, and the distance suitable for printing in the inkjet printing field is 2 to 3 mm. In the second step S12, the first direction driving mechanism 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 starting end. During the movement, the nozzle ejects ink droplets and the curing device will The ink droplets solidify. In the third step S13, the second direction driving mechanism drives the printing carriage to move in the second direction (Y-axis direction) (the step distance is determined according to the required printing resolution and the software setting). In the fourth step S14, the first direction driving mechanism 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 starting end, and the same nozzle inkjet and curing device during the movement. The ink droplets are cured. In the fifth step S15, it is determined whether the printing carriage implements the second direction step of the software preset. If not, the third step S13, the fourth step S14 and the fifth step S15 are performed again; if yes, the sixth step is performed. Step S16: The printing carriage returns to the printing start position in the second direction (Y-axis direction). In the seventh step S17, it is determined whether the image on the printing medium is printed to the preset height. If not, the second step S12 - the seventh step S17 is performed again; if yes, the eighth step S18 is performed: the third direction driving mechanism The driving printing carriage is raised in the third direction (Z-axis direction) by a predetermined small distance. In the ninth step S19, it is judged whether the image on the printing medium is printed to the required height, and if not, the second step S12 - the ninth step S19 is performed again; if so, the movement of the printing carriage is ended. The movement of the printing medium is still distinguished by the coil type and the sheet type. See the movement of the paper feeding mechanism in Fig. 4 or the method of installing the sheet type printing medium in Fig. 5, which is not limited thereto.

When the printing method does not need to print the 3D stereo effect, only steps S11-S15 are performed, and in step S15, it is determined whether the printing carriage implements the second direction stepping of the software preset, and if not, re-execute The third step S13, the fourth step S14, and the fifth step S15; if yes, the supply operation of the new print medium is performed with reference to step S7 in FIG. 4 or step S07 in FIG.

7 is a flow chart of still another printing method of the ink jet printing apparatus of the present invention, which is used for one-time image fast printing of a web-type printing medium, comprising ejecting ink droplets by a nozzle mounted on a printing carriage And printing the ultraviolet light to the printing medium by the curing device disposed at both ends of the printing carriage to solidify the ink droplet to realize printing, and the first direction driving mechanism drives the printing carriage to be fixed at a position directly above the printing platform. During the printing process, the printing carriage remains stationary, and the paper feeding mechanism supplies the printing medium at a constant speed in the first direction. The printing method comprises the following steps: in the first step S001, the first direction driving mechanism drives the printing carriage to move from the one end in the first direction (X-axis direction) to directly above the printing platform, and stops at a predetermined position; In the second step S002, the distance between the plane of the nozzle nozzle and the printing medium is adjusted to the printing distance by adjusting the driving mechanism of the third direction; in the third step S003, the paper feeding mechanism is driven to drive the printing medium of the coil type. The paper end moves to the delivery end, that is, the printing medium is supplied at a constant speed, and the ink droplets are ejected from the nozzle during the movement of the printing medium, and the curing device irradiates the ultraviolet rays to solidify the ink droplets; the fourth step S004, It is judged whether the printing image is completed or not. If it is completed, the printing is directly ended. If not, the third step S003 is repeated until the printing is completed.

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

1‧‧‧First direction drive mechanism

2‧‧‧second direction drive mechanism

3‧‧‧Third direction drive mechanism

4‧‧‧Printing trolley

5‧‧‧Printing platform

6‧‧‧Scratch maintenance device

7‧‧‧Feeding mechanism

11‧‧‧First drag chain

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 ejector

41‧‧‧Curing device

71‧‧‧Receiving agency

72‧‧‧Paper mechanism

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

Figure 2 is a left side elevational view of the ink jet printing apparatus in one embodiment of the present invention;

Figure 3 is a schematic view showing the relative movement of the printing carriage of the present invention;

4 is a flow chart of an inkjet printing method for printing a 3D stereo effect according to an embodiment of the present invention;

5 is a flow chart of a method for printing an inkjet printing method for printing a 3D stereo effect according to another embodiment of the present invention;

6 is a flow chart of a printing method in still another embodiment of the present invention;

FIG. 7 is a flow chart of a printing method in still another embodiment of the present invention.

1‧‧‧First direction drive mechanism

2‧‧‧second direction drive mechanism

3‧‧‧Third direction drive mechanism

4‧‧‧Printing trolley

5‧‧‧Printing platform

6‧‧‧Scratch maintenance device

7‧‧‧Feeding mechanism

11‧‧‧First drag chain

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 ejector

41‧‧‧Curing device

71‧‧‧Receiving agency

72‧‧‧Paper mechanism

Claims (10)

An inkjet printing device comprises: a printing carriage, wherein at least one printing nozzle is mounted on the printing carriage, the printing width of the printing nozzle is greater than or equal to the width of the printing medium disposed below, and the printing is small a fixing device is installed at both ends of the vehicle; a first direction driving mechanism is used for installing the printing carriage, and controlling the printing carriage to reciprocate in the first direction; a printing platform, the printing platform is arranged with the printing a third direction driving mechanism that controls the printing carriage to perform a lifting movement in a third direction perpendicular to the printing platform; a control system, the control system controls the printing carriage, the first direction driving The mechanism, the third direction drive mechanism, and the operation of the print head. The ink jet printing apparatus according to claim 1, further comprising a paper feed mechanism that transports the print medium in the first direction. The inkjet printing device according to claim 1, further comprising a second direction driving mechanism, wherein the second direction driving mechanism is connected to the printing carriage through the bracket, and controls the printing carriage along the The second direction of the first direction is a stepwise motion for improving the resolution of the printed image. The inkjet printing device according to claim 1, wherein said first direction driving mechanism comprises a first drag chain, a first direction guide rail, a first direction slider, a first motor and a first bracket, and control The system controls the first motor to drive the printing carriage to move in the first direction. During the movement, the first direction slider installed under the printing carriage cooperates with the first direction rail above the first bracket to restrain the movement direction. The inkjet printing device according to claim 4, wherein the first direction guide rail is disposed at each of the front and rear ends of the printing platform, and the bottom surface of the printing carriage is mounted on the two rails. Two sliders are arranged on each rail. The inkjet printing apparatus according to any one of claims 1 to 5, wherein the printing carriage is driven by the first direction driving mechanism to be opposite to the printing medium from the first direction After the reciprocating motion and the ink droplets are ejected by the nozzle, after the multi-pass superimposition printing, the third direction driving mechanism drives the printing carriage to rise in a third direction perpendicular to the printing platform, and then the control system continues to control the printing carriage. The overlay is superimposed and printed in the first direction. The inkjet printing apparatus according to any one of claims 1 to 5, wherein the printing carriage is driven by the first direction driving mechanism to be opposite to the printing medium from the first direction Reciprocating and ejecting ink droplets by the head, the printing carriage being moved again to the starting end in the first direction and then driven by the second direction driving mechanism to move stepwise from the second direction relative to the printing medium, and then The printing carriage continues to reciprocate from the first direction and ejects ink droplets by the nozzle, so after repeatedly superimposing the printing, the third direction driving mechanism drives the printing carriage to be along the third perpendicular to the printing platform. The direction is raised, and then the control system continues to control the printing carriage to perform superimposed printing in the first direction and the second direction. A printing method of an ink jet printing apparatus according to claim 2, wherein said printing method ejects ink droplets from a head mounted on said printing carriage, and is disposed by said printing The curing device on the vehicle irradiates ultraviolet light to the printing medium to cure the ink droplets, and the printing carriage reciprocates relative to the printing medium along the first direction, the paper feeding mechanism along the The first direction indirectly conveys the printing medium; the printing method includes the following steps: First, the control system controls the printing carriage to reciprocate relative to the printing medium in the first direction and from the nozzle The printing medium ejects the ink droplets, and simultaneously controls the curing device to irradiate the ultraviolet rays to solidify the ink droplets, so that the printing image of the printing medium on the printing platform is printed; the second step, the control system controls the paper feeding mechanism along the The first direction conveys the same amount of printing medium as the length of the printing platform in the first direction, and simultaneously prints the movement of the carriage back to the printing start end; the third step repeats the first step and the second step Until installed on the paper feeding mechanism The print media print is complete. A printing method of an ink jet printing apparatus according to any one of claims 1 to 5, wherein said printing method ejects ink droplets from a head mounted on said printing carriage, and is set by A curing device at both ends of the printing carriage irradiates ultraviolet light to the printing medium to cure the ink droplets to perform printing, and the printing carriage moves back and forth relative to the printing medium in the first direction, The printing carriage moves up and down relative to the printing medium in a third direction perpendicular to the printing platform; the printing method comprises the following steps: First, the control system controls the printing carriage along the first One direction reciprocates relative to the printing medium and ejects ink droplets from the nozzle to the printing medium, and controls the curing device to irradiate ultraviolet rays to solidify the ink droplets; and secondly, the printing carriage is printed in the first direction relative to the printing After the medium is multi-passed and superimposed and printed, the third direction driving mechanism drives the printing carriage to rise in a third direction perpendicular to the printing platform; in the third step, the first step and the second step are repeated until the printing platform is located. The column on which the media is printed To achieve the desired effect of the stereoscopic images. A printing method of an ink jet printing apparatus according to any one of claims 1 to 5, wherein said printing method ejects ink droplets from a head mounted on said printing carriage, and is set by The curing device at both ends of the printing carriage irradiates ultraviolet light to the printing medium to solidify the ink droplet to realize printing, and the printing carriage performs relative reciprocating movement relative to the printing medium along the first direction. The printing carriage is also stepwise moved relative to the printing medium in a second direction perpendicular to the first direction, the printing carriage being printed relative to the third direction perpendicular to the printing platform The printing medium moves up and down; the printing method comprises the following steps: First, the control system controls the printing carriage to reciprocate relative to the printing medium in a first direction and sprays the printing medium from the nozzle to the printing medium The ink droplets simultaneously control the curing device to irradiate the ultraviolet rays to solidify the ink droplets; the second step, after the printing carriage moves to the first direction starting end again, the control system controls the printing carriage to be second along the first direction Direction relative to printing The stepping movement is performed; in the third step, the first step and the second step are repeated until the printing image reaches the required resolution, and then the printing carriage returns to the printing in the second direction perpendicular to the first direction. The fourth step repeats the first step, the second step and the third step until the print image is superimposed to a preset height, and the control system controls the printing carriage to rise in the third direction; Repeat steps 1, 2, 3, and 4 until the printed image of the printed media on the printing platform achieves the desired stereo effect.