CN211684158U

CN211684158U - Ink-jet printing device

Info

Publication number: CN211684158U
Application number: CN201922398495.9U
Authority: CN
Inventors: 张原�; 张征宇
Original assignee: Beijing Yameike Software Co ltd
Current assignee: Beijing Yameike Software Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-10-16
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses an ink-jet printing device, which comprises a clamp assembly of an object to be printed, a base part, a printing trolley and a cross beam, wherein the base part is arranged at the bottom of the device, an object to be printed is arranged above the base part and assembled by a clamp, a beam is arranged above the object to be printed and assembled by the clamp, a printing trolley is arranged on the beam, it is characterized in that the length direction of an object to be printed on the clamp assembly is parallel to the second direction, at least one row of spray heads is arranged on the printing trolley, the row of spray heads is at least two, the spray hole connecting line of each spray head is parallel to the second direction, and the spray heads of the row are arranged side by side at intervals along the width direction of the spray heads, namely the first direction, and are aligned end to end, in the printing process, all the jet holes of the spray head participate in the ink jet of the set area above each object to be printed, and the time for ejecting the ink drops in advance at the positions with different heights from the spray orifice of the spray head in the set area is different. The utility model discloses when improving printing efficiency, ensured the inkjet quality.

Description

Ink-jet printing device

Technical Field

The utility model relates to an ink jet printing device especially relates to an ink jet printing device for printing cylinder treats printed matter.

Background

The ink jet printing technology is a technology of obtaining a printed image or text by ejecting ink droplets onto an object to be printed through an ejection head. The technology is non-contact printing, has the advantages of high printing speed, small pollution, adaptability to various objects to be printed and the like, and is widely applied to the industrial field. The ink-jet printing is divided into Scanning type (Scanning) ink-jet printing and Single-pass ink-jet printing according to the movement modes of the printing trolley and the object to be printed, the Scanning type ink-jet printing comprises roll-to-roll ink-jet printing and flat-bed ink-jet printing, wherein the printing trolley moves back and forth along the guide rail beam relative to the object to be printed in the ink-jet printing process, the object to be printed moves relatively along the direction vertical to the movement direction of the printing trolley, and the guide rail beam on which the printing trolley is mounted is stationary; the platform ink-jet printing has two conditions in the ink-jet printing process, one is that the guide rail beam is not moved in the ink-jet printing process, the printing trolley moves back and forth along the guide rail beam, and the printing platform moves relatively along the direction vertical to the moving direction of the printing trolley; there is also a case where the printing platform is stationary, the printing carriage moves back and forth along the guide rail beam relative to the object to be printed, and the printing carriage relatively moves in a direction perpendicular to the guide rail beam. And the printing trolley is still during the ink-jet process of the one-time paper feeding imaging ink-jet printing, and the object to be printed moves in a unidirectional high speed. The requirement on the printing precision and the printing width of the spray head is high by adopting one-time paper feeding imaging ink-jet printing, the printing precision of the spray head needs to be the printing precision of an image, the printing width of the spray head needs to be the printing width of the image, and the high precision is obtained by splicing the spray heads and the wider printing width is obtained by connecting the spray heads in series.

The method is generally used for printing plane objects, more and more curved surface objects need digital printing along with the enhancement of personalized requirements, when the objects are cylinders or the areas to be printed are cylinders, the objects cannot be printed by the conventional mode, an ink jet printing device specially aiming at the curved surface printing is needed, in order to improve the whole working efficiency, the objects to be printed can be printed by a batch printing mode, at the moment, a jig is needed to be arranged for installing a plurality of objects to be printed, when the plurality of objects to be printed in the existing printing device in the market are printed in batch, the length direction of the plurality of objects to be printed is vertical to the connecting line direction of the spray orifices of each spray head, because the upper surface of the objects to be printed is a curved surface, the distances from the areas to be printed in the curved surface to the spray orifices of the spray heads are different, if all the spray orifices of the spray heads spray ink, the printing effect cannot be guaranteed, usually, ink is jetted by only using partial spray orifices above the middle, thus, the spray holes of the spray head cannot work fully, and the printing efficiency is reduced; if the effect of the transparent ink needs to be printed, the transparent ink needs to be printed for the second time after the color pictures and texts are solidified for the first time, so that the printing time is increased; thirdly, the distance between the jigs for placing a plurality of objects to be printed can not be adjusted usually, and when the objects to be printed with different diameters and sizes are replaced, the corresponding jigs need to be replaced again. How to make full use of the nozzle orifice to control the targeted and accurate inking, not only improves the spray painting efficiency but also ensures the spray painting quality, and also enables the jig to be compatible with objects to be printed of different sizes for printing, so that a key technical problem is formed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the limitation among the prior art, provide an ink jet printing device that printing speed is fast, printing quality is high, and print cylinder surface picture and text in batches.

The above technical problem of the present invention is solved by the following technical solutions: the utility model provides an ink-jet printing device, which comprises a clamp assembly of an object to be printed, a base part, a printing trolley and a cross beam, wherein the base part is arranged at the bottom of the ink-jet printing device, at least one clamp assembly of the object to be printed is arranged above the base part, the clamp assembly of the object to be printed is used for installing at least one row of the object to be printed and driving the object to be printed to synchronously rotate, the cross beam is arranged above the clamp assembly of the object to be printed along a first direction, the printing trolley is arranged on the cross beam, the printing trolley moves along the cross beam, namely the first direction, the cross beam can drive the printing trolley on the cross beam to move in a stepping manner along a second direction which is vertical to the first direction, the ink-jet printing device is characterized in that the length direction of the object to be printed on the clamp assembly is arranged in parallel to the second direction, at least one row of nozzles are arranged on, and the rows of spray heads are aligned side by side at intervals along the width direction of the spray heads, namely the first direction, in the printing process, all spray holes of the spray heads participate in ink jet of a set area above each object to be printed, software corrects and calculates the height difference between each position in the set area and the spray holes of the spray heads, and controls each position with the height difference to spray ink drops at different time in advance.

In the above ink jet printing apparatus, the object to be printed is a cylinder or the area to be printed is a cylinder of the object to be printed.

In the above inkjet printing apparatus, the inkjet printing apparatus further includes a wiping maintenance device, the wiping maintenance device is disposed on one side of the cross beam and below an initial printing position of the printing cart, and the wiping maintenance device is configured to perform wiping and moisture-preserving maintenance operations on the nozzle.

In the above inkjet printing apparatus, the to-be-printed object clamps are assembled into two groups, and when the to-be-printed object assembled on one of the groups of to-be-printed object clamps is printed, the other group of to-be-printed object clamp assembly performs loading and unloading operations on the to-be-printed object.

In foretell inkjet printing device, treat that print object anchor clamps assembly include anchor clamps base subassembly, power component, driven subassembly, conveyer belt and rubber tyer subassembly, the anchor clamps base sets up in the bottom of treating print object anchor clamps assembly, one end at anchor clamps base subassembly sets up power component, the other end sets up driven subassembly, install a conveyer belt between power component and the driven subassembly, set up a plurality of rubber tyer subassemblies at conveyer belt upper portion interval, place the object of treating printing above the rubber tyer subassembly, through friction, power component can drive the angle of treating the object of treating to print around the rotatory settlement of self center pin.

In the above inkjet printing apparatus, the rubber wheel assembly includes a handle, two bearing seats, two rubber wheel shafts, two rubber sleeves and two shafts, the two bearing seats are respectively disposed at the outer sides of the two aluminum profiles in the fixture base assembly, a semicircular groove is disposed at the lower end of the bearing seat, a long optical shaft penetrates into the semicircular groove, the bearing seats are tightly pressed onto the long optical shaft through the top end of the handle, a shaft passes through the middle of the two bearing seats, at least two rubber wheel shafts are sleeved in the shaft, the lower portion of each rubber wheel shaft is in contact with the conveyor belt and has friction, an object to be printed is placed above the rubber wheel shaft and is used for driving the object to be printed to rotate, a rubber sleeve is mounted on each rubber wheel shaft, and the rubber sleeves are used for providing friction for the conveyor.

In the above ink jet printing apparatus, the object to be printed holder is fitted with a row of objects to be printed.

In the above ink jet printing apparatus, two rows of the objects to be printed are placed on the object to be printed clamp.

In the above inkjet printing apparatus, a curing device is disposed on one side or both sides of the printing carriage.

The beneficial effects of the utility model reside in that:

1. the objects to be printed and the printing nozzles are arranged in the mode, on the basis of processing a plurality of objects to be printed in batches, each row of spray holes of the nozzles can be used for spraying ink, and the situation that part of spray holes are required to work in the traditional printing process is avoided, so that the utilization rate of the nozzles and the spray painting efficiency are improved.

2. The ink droplets ejected on each line along the Y-axis direction on the side wall of the object to be printed are ejected by a row of ejection holes with the same height as the ejection holes, so that the effect of ink droplet printing along the direction is more excellent.

3. The clamp for the object to be printed is ingenious in arrangement, can be flexibly adjusted or replaced according to the diameters of different objects to be printed, is flexible and simple, and enlarges the application range of the printing device.

Drawings

Fig. 1 is a schematic perspective view of a printing apparatus according to an embodiment of the present invention;

fig. 2 is a top view of a printing device according to an embodiment of the present invention;

FIG. 3 is a schematic view of the structure of the fixture assembly according to an embodiment of the present invention;

FIG. 4 is a schematic view of the assembly structure of the clamp after the object 2 to be printed is hidden in FIG. 3;

FIG. 5 is a schematic structural view of the fixture mount assembly of FIG. 3;

FIG. 6 is a schematic structural view of the power assembly of FIG. 3;

FIG. 7 is a schematic structural view of the rubber wheel assembly shown in FIG. 3;

FIG. 8 is a bottom view of the print carriage in accordance with one embodiment of the present invention;

fig. 9 is a schematic illustration of a front view of a nozzle of the present invention passing over an object to be printed;

fig. 10 is a printing flowchart of a printing embodiment of the present invention.

The sequence numbers in the figure show: the printing device comprises an object to be printed clamp assembly 1, an object to be printed 2, a base part 3, a platform 4, a printing trolley 5, a cross beam 6, a scraping maintenance device 7, a drag chain 8, a second object to be printed clamp assembly 01, a clamp base assembly 11, a power assembly 12, a driven assembly 13, a conveyor belt 14, a rubber wheel assembly 15, a long optical axis 16, a first short optical axis 17, a second short optical axis 18, a honeycomb platform 111, an aluminum profile 112, a guide optical axis 113, a fixing plate 114, a power roller 121, a driving motor 122, a mounting frame 123, a speed reducer assembly 124, a connecting piece 125, a handle 151, a bearing seat 152, an encapsulated wheel shaft 153, a rubber sleeve 154, a shaft 155, a curing device 50, a nozzle bottom plate 51, a first nozzle 52, a second nozzle 53, a third nozzle 54, a fourth nozzle 55, a fifth nozzle 56, a nozzle 57, and a distance H from the nozzle hole on the upper surface A or C of the object to be printed, the highest position B of the upper surface of the object 2 to be printed is away from the plane where the spray holes of the spray head are located by a distance h in the vertical direction.

Detailed Description

An inkjet printing apparatus according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the inkjet printing apparatus in this embodiment includes an object to be printed fixture assembly 1, an object to be printed 2, a base portion 3, a platform 4, a printing cart 5, a beam 6, a wiping maintenance device 7 and a control system, the base portion 3 is disposed at the bottom of the inkjet printing apparatus, the platform 4 is disposed above the base portion 3, at least one object to be printed fixture assembly 1 is disposed above the platform 4, the object to be printed fixture assembly 1 is used for mounting at least one row of objects to be printed 2 and driving the objects to be printed 2 to rotate, the objects to be printed 2 are disposed in plural numbers along a Y-axis direction, i.e., a second direction, the objects to be printed 2 are cylinders or objects having a cylinder-shaped area to be printed, the beam 6 is disposed along an X-axis direction, i.e., a first direction, above the platform 4 and the object to be printed fixture assembly 1, the beam 6 is mounted with the printing, the printing trolley 5 can move along a cross beam 6 in an X-axis direction (a first direction), the cross beam 6 can drive the printing trolley 5 on the cross beam to move in a stepping mode along a Y-axis direction in a second direction, a wiping maintenance device 7 is arranged on one side of the cross beam 6 and below an initial printing position of the printing trolley 5, the wiping maintenance device 7 is used for wiping ink and moisturizing a spray head, and a control system is used for controlling the whole printing work flow.

It should be noted that, the object to be printed fixture assembly 1 may be designed as one set or as two or more sets according to the actual printing requirement, i.e. the size of the platform. In fig. 2, two sets of the to-be-printed object clamp assemblies 1 are provided, namely, the to-be-printed object clamp assembly 1 and the second to-be-printed object clamp assembly 01 shown in the figure, and when an object to be printed on the to-be-printed object clamp assembly 1 is printed, loading or unloading operation can be performed on the second to-be-printed object clamp assembly 01; while the object to be printed on the second object to be printed clamp assembly 01 is printed, a loading or unloading operation can be performed on the object to be printed clamp assembly 1. Therefore, the printing trolley is not required to wait for the feeding or discharging of the object, the printing trolley is fully utilized to continuously print, and the working efficiency is improved.

The specific design structure of the object to be printed clamp assembly 1 is described in detail below by referring to fig. 3 to 4, and the object to be printed clamp assembly 1 comprises a clamp base assembly 11, a power assembly 12, a driven assembly 13, a conveyor belt 14, a rubber wheel assembly 15 and an optical axis.

Anchor clamps base subassembly 11 sets up in the bottom of waiting to print object anchor clamps assembly 1, anchor clamps base subassembly 11 includes honeycomb platform 111, aluminium alloy 112, direction optical axis 113 and fixed plate 114, as shown in fig. 5, honeycomb platform 111's size sets for as required, respectively set up an aluminium alloy 112 in the below on the long limit of honeycomb platform 111 both sides, honeycomb platform 111's width direction interval sets up the short aluminium alloy (not shown in the figure) that corresponds the width downwards, it is fixed through fixed plate 114 and aluminium alloy 112, still respectively set up a direction optical axis 113 in honeycomb platform 111 length direction's both sides respectively, direction optical axis 113 is used for playing the guide effect to the object of waiting to print after placing.

One end of the clamp base assembly 11 is provided with a power assembly 12, and the other end is provided with a driven assembly 13. As shown in fig. 6, the power assembly 12 includes a power roller 121, a driving motor 122, a mounting bracket 123 and a speed reducer assembly 124, the power assembly 12 is respectively connected with the two aluminum profiles 112 on the two sides of the clamp base assembly 11 through the two mounting brackets 123, the power roller 121 is disposed between the two mounting brackets 123, a driving motor 122 is disposed at one end of the power roller 121, the driving motor 122 is connected with the speed reducer assembly 124, the speed reducer assembly 124 is connected with the mounting bracket 123 through a connecting piece 125, and the driving motor 122 is used for driving the power roller 121 to rotate.

Similarly, a driven assembly 13 is arranged at the other end of the clamp base assembly, a driving device is not arranged in the driven assembly, and only a driven roller and a mounting frame which are designed corresponding to the power assembly 12 are included.

A conveyor belt 14 is installed between a power roller 121 of the power assembly 12 and a driven roller of the driven assembly 13, a driving motor 122 drives the power roller 121 to rotate, and further, the power roller 121 drives the conveyor belt 14 to move between the power roller 121 and the driven roller.

A plurality of rows of rubber roller assemblies 15 are provided at intervals in the Y-axis direction, i.e., the second direction, on the upper portion of the conveyor belt 14. The rubber wheel assembly 15 comprises a handle 151, a bearing seat 152, rubber wheel wrapping shafts 153, rubber sleeves 154 and shafts 155, as shown in fig. 7, the bearing seat 152 is respectively arranged at two ends of the rubber wheel assembly 15 and respectively arranged at the outer sides of two aluminum profiles 112 in the clamp base assembly 11, a semicircular groove is arranged at the lower end of the bearing seat 152, a guide optical axis 113 penetrates into the groove, the bearing seat 152 is tightly pressed on the guide optical axis 113 through the top end of the handle 151, the bearing seat 152 is guided through the guide optical axis 113, a shaft 155 penetrates through the middle of the two bearing seats 152, a plurality of rubber wheel wrapping shafts 153 are sleeved in the shaft 155, a rubber sleeve 154 is arranged on each rubber wheel wrapping shaft 153, the lower part of the rubber sleeve 154 is in contact with the conveyor belt 14 and has certain friction force, an object 2 to be printed is placed above the rubber sleeve 154 and has certain friction force, the number of the rubber wheel wrapping shafts 153 is determined according, when the power assembly 12 drives the conveyor belt 14 to convey, the encapsulation wheel shaft 153 above the conveyor belt performs relative reverse rotation, so that the object to be printed 2 above the encapsulation wheel shaft 153 performs relative rotation through friction. In the present embodiment, four blanket axle 153 are disposed on each shaft 155, and one object 2 to be printed is placed on every two adjacent shafts 155 and on every two blanket axles 153 of each shaft 155, that is, two objects 2 to be printed are placed in the length direction of every two adjacent shafts 155, and the length direction of the objects 2 to be printed is parallel to the Y-axis direction, that is, the second direction. The spacing and number of the rubber wheel assemblies 15 are determined according to the size, weight and the like of the object 2 to be printed. When changing the waiting to print object 2 of different diameters, unscrew handle 151, remove and adjust rubber tyer subassembly 15 along the X axle direction the distance of first direction promptly can, after two adjacent rubber tyer subassemblies 15 are adjusted to suitable distance, it is fixed with rubber tyer subassembly 15 to screw up handle 151 again, alright place the waiting to print object of different diameters and control its self rotation.

In this embodiment, a long optical axis 16 is disposed in the middle above each rubber wheel assembly 15 along the X-axis direction, i.e., the first direction, two rows of objects 2 to be printed are disposed, the bottom end of each object 2 to be printed in each row abuts against the long optical axis 16, and the long optical axis 16 is used for positioning each row of objects 2 to be printed along the Y-axis direction, i.e., the second direction. Still connect first short optical axis 17 and the short optical axis 18 of second respectively through the bearing frame at long optical axis 16 both ends, first short optical axis 17 and the short optical axis 18 of second set up along the Y axle direction promptly second direction, and on the both ends of first short optical axis 17 were connected to two mounting brackets 123 in power component 12 respectively, correspond equally, and the both ends of the short optical axis 18 of second are connected to two mounting brackets in driven component 13 respectively.

It should be noted that, if the length of the object to be printed is long, only one row of the object to be printed can be placed on the fixture base assembly 11, and at this time, the long optical axis 16 does not need to be provided, and the fixing, rotating and adjusting principles of the object to be printed are the same as those described above.

The following describes in detail the arrangement and printing principle of the nozzles in an embodiment of the present invention, as shown in fig. 8, which is a bottom view of the printing cart 5, in this embodiment, three rows of nozzles are disposed on the nozzle bottom plate 51, as shown in the figure, the three rows of nozzles are disposed along the Y-axis direction, i.e., the second direction, the nozzle hole connecting line (nozzle length direction) of each nozzle is parallel to the Y-axis direction, i.e., the second direction, the nozzle holes of each row of nozzles are connected end to end in the Y-axis direction, i.e., the second direction, and the first row of nozzles are disposed with a first nozzle 52 for printing white W; the second row of nozzles are provided with three nozzles, namely a second nozzle 53, a third nozzle 54 and a fourth nozzle 55, the three nozzles are arranged side by side at intervals along the width direction of the three nozzles, namely the X-axis direction (the first direction), the heads of the three nozzles are aligned and parallel to each other, each nozzle is provided with two rows of spray holes, each row of spray holes sprays ink with one color, each nozzle can spray ink with two colors, for example, the second nozzle 53 sprays light magenta Lm ink and light cyan Lc ink respectively, the third nozzle 54 sprays yellow Y ink and magenta M ink respectively, and the fourth nozzle 55 sprays cyan C ink and black K ink respectively; the third row of nozzles is provided with a fifth nozzle 56 for printing the transparent V ink. The ink uses UV ink, the printing trolley 5 moves back and forth along the X-axis direction in the printing process, namely the first direction, the first row of spray heads firstly enters an image-text area to be printed, the first spray head 52 sprays white ink to form a first white background layer, the cross beam 6 moves step by step along the Y-axis direction after the trolley 5 to be printed moves back and forth along the X-axis to the initial position of the cross beam 6, the second row of spray heads enters the image-text area to be printed, the second spray head 53, the third spray head 54 and the fourth spray head 55 begin to spray color ink to form a second color image layer, the color image layer covers the white background layer, the cross beam 6 moves step by step along the Y-axis direction after the trolley 5 to be printed moves back and forth along the X-axis to the initial position of the cross beam, the third row of spray heads enters the image-text area to be printed, the fifth spray head 56 begins to spray transparent ink, and forming a third transparent coating, covering the transparent coating on the color image layer, continuing printing in the mode until the printing of the areas to be printed on the upper surfaces of all the objects to be printed 2 on the object to be printed clamp assembly 1 is completed, then driving all the objects to be printed 2 to rotate by a certain angle by the object to be printed clamp assembly 1, and printing the areas to be printed on the upper surfaces by using the mode again. It should be noted that the number of the arranged rows of the nozzles, the number of the arranged nozzles in each row, and the color of the nozzles to be used are determined according to actual printing requirements, for example, two or more nozzles may be arranged in the first row of the nozzles and the third row of the nozzles, and a single color of the nozzles or other number of nozzles may be arranged in the second row of the nozzles. Or only one row of color nozzles is arranged on the nozzle bottom plate 51, which is used for the condition that only color pictures and texts need to be printed without printing a white background layer and a transparent ink foreground layer. It is also possible to provide only one row of nozzles on the nozzle base plate 51, including both white ink nozzles and color ink nozzles or transparent ink nozzles, but to perform ink ejection control on the nozzle orifices in a two-segment or three-segment inking manner. The present embodiment is merely illustrative of the printing principle, and the specific arrangement is not limited.

The two sides of the nozzle bottom plate 51 are respectively provided with a curing device 50, and the curing devices 50 are ultraviolet curing lamps and are used for curing ink in the printing process. The curing device 50 may also be disposed on one side of the print head base plate 51. The specific settings are determined according to actual printing requirements.

The printing principle and the printing method of the present invention will be specifically described below with reference to fig. 9 to 10.

Firstly, the object 2 to be printed is mounted on the object clamp assembly 1 to be printed, then the operator clicks the start button, the printing trolley 5 moves from the initial position to the end position on the other side along the beam 6, i.e. the X-axis direction/the first direction, when the nozzle passes over the area to be printed of the object 2 to be printed, ink droplets are ejected to form images and texts, it is to be noted that the area to be printed of the object 2 to be printed is set to a range, as shown in fig. 9, a nozzle 57 is taken as an example for description, the printing area range of each object to be printed during the movement of the nozzle 57 from the initial position to the end position of the beam 6 is a region from a to C shown by hatching in the figure, the distance from the nozzle hole of the nozzle to the upper surface a of the object 2 to be printed (the edge position of the printing area at this time, which is the maximum distance from the upper surface of the object to be printed to the nozzle hole of the nozzle in the, the distance from the highest position B of the upper surface of the object 2 to be printed (the position is the minimum distance position from the upper surface of the object to be printed to the spray orifice of the spray head) to the plane of the spray orifice of the spray head is H in the vertical direction, the position of the upper surface C of the object 2 to be printed and the position A are symmetrical left and right relative to the position B, so the distance from the position C of the upper surface to the plane of the spray orifice of the spray head is H in the vertical direction, because the object 2 to be printed is a cylinder, the value of H is larger than the value of H, and because the ink drops sprayed by the spray orifice of the spray head perform parabolic motion with the initial speed in the X-axis direction after being sprayed, the ink drops should be sprayed by the spray orifice before reaching the position vertically above the expected drop point, if the heights of the spray orifice of the spray head from the drop point on the surface of the object 2 to be printed are different, the horizontal direction (the X-axis direction/first, that is, when the continuous pattern is ejected in the region from a to C on the surface of the cylinder, the time t1 for the early ejection of ink drops falling on a and C is greater than the time t2 for the early ejection of ink drops falling on B, i.e., t1 > t2, the value of t1 is related to the radius R of the object 2 to be printed and the distance H from the plane of the ejection nozzle in the vertical direction at a/C, the value of t2 is related to the radius R of the object 2 to be printed and the distance H from the plane of the ejection nozzle in the vertical direction at B, and similarly, the time t for the early ejection of ink drop falling point for each row (along the Y axis) in the region to be printed on the object 2 to be printed is related to the radius R of the object 2 to be printed and the distance H from the plane of the ejection nozzle at an ink drop point in the vertical direction. Usually, the optimal printing distance between the surface of the object 2 to be printed and the plane where the nozzle holes of the nozzle are located is 1-3 mm, so the value of the maximum distance H is not more than 3 mm, the area range (namely the area range from the position a to the position C) of the jet printing when the printing trolley 5 passes above the object 2 to be printed each time can be calculated according to the radius of the object 2 to be printed, the software algorithm divides and processes the image data according to the set area range, corrects and calculates the height difference of each position in the area range of the printing from the nozzle holes of the nozzle, and simultaneously carries out the ink jetting of each nozzle hole at each position with the height difference in advance for different jet time. By applying the printing mode, all the jet holes in each row of the spray head can be fully utilized for ink jetting, so that the utilization rate of the spray head and the spray painting efficiency are improved; and the ink droplets ejected on each line along the Y-axis direction on the side wall of the object 2 to be printed are ejected from a row of ejection holes having the same distance from the ejection holes, so that the effect of ink droplet printing in this direction is more excellent.

When the printing trolley 5 moves from the initial position to the end position on the other side along the beam 6, namely the X-axis direction/the first direction, the software corrects and calculates the height difference of the drop points of the ink droplets, controls the spray orifices of the spray head to jet ink in a set area range in advance at different time according to the height difference of the drop points of the ink droplets, then the printing trolley 5 moves from the end position to the initial position, and then the program judges whether the printing trolley 5 needs to carry out stepping motion in the Y-axis direction, namely the second direction, if so, the beam 6 drives the printing trolley 5 to step by a distance D along the Y-axis direction, namely the second direction, wherein the stepping distance D is the printing length of the spray orifices of the spray head in the Y-axis direction. The printing trolley 5 moves from the initial position to the end position of the other side along the beam 6, namely the X-axis direction/the first direction, and ink is jetted from the jet orifice of the nozzle in a set range in advance at different time according to the height change of the drop point of the ink droplet in the moving process, the principle is the same as the above, then the printing trolley 5 returns to the initial position, the beam 6 drives the printing trolley 5 to repeat the step distance D … … along the Y-axis direction, namely the second direction, until the printing of the pictures and texts on all the objects to be printed in the row in the set range area (from the position A to the position C) along the Y-axis direction, namely the second direction is completed, at the moment, the program judges whether the printing trolley 5 needs to perform the step movement along the Y-axis direction, namely the second direction, and then the printing trolley.

Then, the program judges whether the object to be printed in the object clamp assembly 1 to be printed is printed or not, if so, the batch of objects is printed; if not, the control system controls the conveyor belt 14 of the power component 12 in the clamp assembly 1 for the object to be printed to rotate for a certain distance, the rubber wheel component 15 in the clamp assembly 1 drives the object to be printed 2 thereon to rotate for a certain angle around the central axis of the rubber wheel component, namely, the object to be printed 2 rotates anticlockwise and downwards from the set range area from the position A to the position C, so that the next area to be printed adjacent to the rubber wheel component rotates to be right above the object to be printed 2, and then the printing method is carried out according to the contents in the previous section: the printing trolley moves from the initial position to the final position along the X-axis direction, namely the first direction, and meanwhile, in the moving process, the jet nozzle of the spray head carries out ink jetting … … in a set area range in advance at different time according to the height change of the drop point of the ink drop, namely, the printing trolley 5 finishes the printing operation on the new area range again.

The previous flow … … is then repeated until the desired complete pattern is printed on the side walls of the batch of objects 2 to be printed.

Besides the above-mentioned unidirectional printing method, the printing cart 5 can also adopt a bidirectional printing method, i.e. the ink droplets are ejected during the reciprocating process of the printing cart 5, then the printing cart 5 can also have a stepping movement in the Y-axis direction, i.e. the second direction, at the end position, and the calculation principle of when the ink droplets are ejected from the nozzle holes of the nozzles is the same as the above-mentioned method.

Because the quantity of printing the object of waiting to print simultaneously is more, can set up two sets of object anchor clamps assemblies of waiting to print, wait to print on waiting to print object anchor clamps assembly 1 when the object print job, can wait to print the object anchor clamps assembly 01 at the second in parallel and install and wait to print the object, wait to print the object and print the job completion back on this waiting to print object anchor clamps assembly 1, crossbeam 6 is along Y axle direction second direction removal to the second and waits to print object anchor clamps assembly 01 top and print the operation to it, the process and the principle of printing are unchangeable. When the object to be printed on the second object to be printed clamp assembly 01 is printed, the object to be printed on the object to be printed clamp assembly 1 can be unloaded in parallel, and then the new object to be printed … … is installed in such a circulating manner, so that the time for loading and unloading can be saved, and the working efficiency is improved.

Any modification made according to the embodiment of the present invention will not depart from the spirit of the present invention and the scope of the claims.

Claims

1. An ink-jet printing device comprises a clamp assembly of an object to be printed, a base part, a printing trolley and a cross beam, wherein the base part is arranged at the bottom of the ink-jet printing device, at least one clamp assembly of the object to be printed is arranged above the base part, the clamp assembly of the object to be printed is used for installing at least one row of the object to be printed and driving the object to be printed to synchronously rotate, the cross beam is arranged above the clamp assembly of the object to be printed along a first direction, the printing trolley is arranged on the cross beam, the printing trolley moves along the cross beam, namely the first direction, and the cross beam can drive the printing trolley on the cross beam to move in a stepping manner along a second direction perpendicular to the first direction, the ink-jet printing device is characterized in that the length direction of the object to be printed on the clamp assembly is arranged in parallel with the second direction, at least one row of nozzles is arranged on the printing trolley, and the, and the rows of spray heads are aligned side by side at intervals along the width direction of the spray heads, namely the first direction, in the printing process, all spray holes of the spray heads participate in ink jet of a set area above each object to be printed, software corrects and calculates the height difference between each position in the set area and the spray holes of the spray heads, and controls each position with the height difference to spray ink drops at different time in advance.

2. Inkjet printing apparatus according to claim 1 wherein the object to be printed is a cylinder or the area to be printed is a cylinder of the object to be printed.

3. Inkjet printing apparatus according to claim 1 wherein the inkjet printing apparatus further includes a wiping maintenance device disposed on one side of the cross member below the initial printing position of the carriage, the wiping maintenance device being adapted to perform wiping and moisturizing maintenance operations on the printhead.

4. The inkjet printing apparatus as claimed in claim 1, wherein said object to be printed fixture assembly is provided in two sets, and when the object to be printed on one set of object to be printed fixture assembly is printed, the other set of object to be printed fixture assembly is used for loading and unloading the object to be printed.

5. The inkjet printing apparatus of claim 1, wherein the object to be printed fixture assembly includes a fixture base assembly, a power assembly, a driven assembly, a conveyor belt, and a rubber wheel assembly, the fixture base is disposed at a bottom of the object to be printed fixture assembly, the power assembly is disposed at one end of the fixture base assembly, the driven assembly is disposed at the other end of the fixture base assembly, the conveyor belt is installed between the power assembly and the driven assembly, the rubber wheel assemblies are disposed at intervals on an upper portion of the conveyor belt, the object to be printed is placed above the rubber wheel assemblies, and the power assembly can drive the object to be printed to rotate around a central axis thereof by a set angle through friction.

6. The inkjet printing apparatus as claimed in claim 5, wherein the rubber wheel assembly includes a handle, two bearing seats, two rubber wheel shafts, a rubber sleeve and a shaft, the two bearing seats are respectively disposed at the outer sides of the two aluminum profiles in the clamp base assembly, a semicircular groove is disposed at the lower end of the bearing seat, a long optical shaft penetrates into the semicircular groove, the bearing seats are pressed against the long optical shaft through the top end of the handle, the shaft penetrates through the middle of the two bearing seats, at least two rubber wheel shafts are sleeved in the shaft, the lower side of each rubber wheel shaft is in contact with the conveying belt and has friction, an object to be printed is placed above the rubber wheel shaft and is used for driving the object to be printed to rotate, and a rubber sleeve is mounted on each rubber wheel shaft and is used for providing friction for the conveying belt and the object to.

7. Inkjet printing apparatus according to claim 1 wherein said object-to-be-printed fixture is fitted with a row of objects to be printed.

8. Inkjet printing apparatus according to claim 1 wherein said object to be printed holder is fitted to hold two rows of objects to be printed.

9. Inkjet printing apparatus according to claim 1 wherein the print carriage is provided with curing means on one or both sides.