CN211684148U - Ink-jet printing device - Google Patents

Abstract

The utility model provides an ink jet printing device, a cylinder is used for printing, the cone or print the region and be the cylinder, the object of cone, printing device is including printing unit and conveyer, conveyer is a carousel, evenly set up a plurality of tools with circumference array mode on the carousel and be used for the installation to wait to print the object, carousel intermittent type rotatory conveying tool, set up the operation station the same with tool quantity around conveyer, the operation station includes an at least printing station, printing station department sets up the printing unit, the printing unit is including printing the crossbeam and printing the dolly, print the dolly on the crossbeam installation, it is used for the air brushing picture and text to print dolly below installation shower nozzle, after printing the completion, the carousel continues the rotation will wait to print the object and convey to next station and carry out other operations. The utility model discloses can improve printing efficiency to treat the inkjet data of printing the object on each tool of independent control respectively, thereby ensure to treat the air brushing quality of printing the object on every tool.

Description

Ink-jet printing device

Technical Field

The utility model relates to an ink jet printer, concretely says so and relates to adopt the rotatory conveying of intermittent type formula, print cylinder, cone or print the regional ink jet printer who is cylinder/circular cone object.

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 field of industrial application. The ink-jet printing is divided into Scanning ink-jet printing and one-time paper feeding imaging (Onepass) ink-jet printing according to the movement modes of the printing trolley and the object to be printed, wherein the Scanning ink-jet printing comprises roll-to-roll ink-jet printing and flatbed ink-jet printing, 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 of the printing trolley is arranged to be 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 objects need digital printing along with the enhancement of personalized requirements, when the objects are cylinders, cones or the areas to be printed are cylinders or cones, the objects cannot be printed by using the conventional mode, an ink-jet printing device special for curved surface printing is needed, the objects to be printed also need pretreatment operation before printing and complete curing operation after printing, in order to improve the overall working efficiency, a plurality of stations can be arranged to simultaneously carry out different operations, for example, a linear conveying pipeline mode is adopted, a plurality of different stations are arranged to work, but the occupied space is larger, and the structure rationalization also needs to be considered in the aspect of transmission and fixation for special curved objects, so that an optimized and efficient printing device structure is designed, and the objects to be printed on each station can be printed to print high-quality pictures and texts, and the key technical problem is solved.

SUMMERY OF THE UTILITY MODEL

Problem to prior art existence, the utility model aims to provide a cooperate with rotatory conveyer, ensure on each tool that the quality was printed to the picture and text inkjet printing device.

To achieve the purpose, the utility model provides an ink-jet printing device, which comprises a printing unit and a conveying device, and is characterized in that the conveying device is a turntable, at least two jigs are uniformly arranged on the turntable in a circumferential array mode for installing objects to be printed, the turntable intermittently rotates the conveying jigs, operation stations with the same number as the jigs are arranged around the conveying device, the operation stations comprise at least one printing station, the printing station is provided with the printing unit, the printing unit comprises a printing cross beam and a printing trolley, the printing cross beam is arranged above the objects to be printed, the arrangement direction is parallel to the rotating central axis of the objects to be printed, the printing trolley is arranged on the printing cross beam, a nozzle is arranged below the printing trolley for painting pictures and texts, when the objects to be printed rotate to the position below the printing cross beam along with the turntable, the turntable stops conveying, and a control system controls the printing trolley to move along, the printing operation is completed through simultaneously spraying ink drops above the object to be printed in one pass, in the printing process, the object to be printed rotates around the central shaft of the object at a constant speed, and after the printing is completed, the turntable continues to rotate to convey the object to be printed to the next station for other operations.

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

In the inkjet printing device, the operation station may further include a pretreatment station, a curing station, and a loading and unloading station.

Among the above-mentioned inkjet printing device, each tool is independent to be connected driving motor and encoder, and driving motor is used for the drive to wait to print the object and is rotatory around self center pin, and the encoder is used for detecting and feeding back the rotation signal who waits to print the object.

In the inkjet printing device, the signal fed back by the encoder is transmitted to the signal receiving board, the signal receiving board receives the enabling signal sent by the printing station, the enabling signal is used for feeding back which jig is positioned at the printing position to prepare for printing operation, the signal receiving board receives the signal sent by the encoder on the jig and carries out signal conversion and transmission, and the transmitted signal is transmitted to the circuit control board and used for controlling the nozzle to discharge ink.

In the inkjet printing device, a divider and a motor are arranged below the rotary table and used for controlling the transmission and stop of the rotary table, and the stop time of the rotary table is the longest operation time in each station.

In the inkjet printing device, the number of the stations is the same as the number of the jigs arranged on the conveying device.

In the inkjet printing device, the number of starting and stopping the turntable for one rotation is the same as the number of the stations.

The utility model discloses an ink jet printing device and printing method for ink jet printing device, structural design is ingenious, sets up a plurality of tools on printing device's the conveying carousel in the circumferential array mode, and the tool is used for installing fixedly waiting to print the object, and each waits to print the object and around conveying carousel center pin intermittent type rotation conveying, when the carousel stops conveying, waits to print the object on each station and carries out different operations simultaneously, can improve and print efficiency; in addition, the jig at the printing station can feed back signals to the signal selection board, so that real-time rotation information (such as rotation speed, rotation angle and the like) of the object to be printed on the printing station is received independently, the information is transmitted to the circuit control board to control the nozzle of the printing unit to receive ink discharging data in a targeted manner, and high-quality image-text information can be printed on the object to be printed on each station.

Drawings

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

FIG. 2 is a schematic view of an ink jet printing apparatus according to another embodiment of the present invention;

fig. 3 is a bottom view of the print carriage in an embodiment of the present invention;

FIG. 4 is a schematic view of a printing unit of the inkjet printing apparatus of the present invention;

fig. 5 is a schematic structural view of the nozzle protection mechanism of the present invention;

FIG. 6 is a schematic view of a signal selection board for an inkjet printing apparatus according to an embodiment of the present invention;

FIG. 7 is a top view of a transfer device in accordance with another embodiment;

fig. 8 is a schematic structural diagram of a signal selection board in the embodiment of fig. 7.

In the figure: printing trolley 1, printing beam 2, ink scraping maintenance device 3, object to be printed 4, printing device support frame 5, conveying device 6, UV lamp curing device 7, spray head protection mechanism 9, spray head bottom plate 11, spray head 12, printing beam support 21, first sensor emitting end 01, first sensor receiving end 02, second sensor 91, second sensor reflecting end 92, second sensor emitting light beam 90, screw rod motor 93, first limit switch 94, second limit switch 95, slide block 96, guide rail 97, sensor cover plate 98, emitting hole 99, conveying turntable 60, first jig 61, second jig 62, third jig 63, fourth jig 64, divider 65, motor 66, pretreatment station P1, printing station P2, complete curing station P3, loading and unloading station P4, first station S1, second station S2, third station S3, fourth station S4, printing station P2, printing device supporting frame, and UV lamp curing device 7, A fifth station S5, a sixth station S6, a seventh station S7, an eighth station S8, a ninth station S9, a tenth station S10, an eleventh station S11, a twelfth station S12, a first double-layer wiring terminal JP1, a second double-layer wiring terminal JP2, a signal selection terminal JP3, a first chip U20, a second chip U21, a third chip U22, a fourth chip U23, a single-end-to-differential chip U30, and an output terminal JP 4.

Detailed Description

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

First, the printing apparatus of the present invention is described, as shown in fig. 1 and 2, the ink jet printing apparatus of the present invention includes a printing unit, a wiping maintenance device 3, an object to be printed 4, a conveying device 6, and a control system (not shown). Conveyer 6 is a rotatory conveyer, and the middle part sets up a circular shape conveying carousel 60, and equidistant four tools that set up with the circumference array mode on conveying carousel 60 do respectively: the printing device comprises a first jig 61, a second jig 62, a third jig 63 and a fourth jig 64, wherein each jig is used for installing and fixing an object to be printed, in the working process, the four jigs perform intermittent rotary transmission, a motor 66 and a divider 65 are arranged below a transmission turntable 60, and the motor 66 and the divider 65 are used for controlling the transmission and the stop of the transmission turntable 60. The printing unit is arranged at the position of a second jig 62 shown in the figure and comprises a printing trolley 1, a printing beam 2 and a printing beam support 21, the printing beam support 21 is arranged at the outer side of the second jig 62 in the conveying device 6, the printing beam 2 is arranged on the printing beam support 21 and used for supporting the printing beam, the printing trolley 1 is arranged on the printing beam 2, the printing trolley 1 can move back and forth along the printing beam 2, namely the X-axis direction (first direction), a wiping maintenance device 3 is arranged below one side (initial position of the printing trolley 1) of the printing beam 2, and the wiping maintenance device 3 is used for wiping ink or preserving maintenance operation of a spray head on the printing trolley 1.

It should be noted that, treat that the printing object can be cylinder or cone, also can be the object of cylinder or cone for printing the region, the design of tool should satisfy both can install the object of waiting to print of different length, can adjust the depth of parallelism of waiting to print the object upper surface again and be used for printing different tapering objects of waiting to print, be provided with independent driving motor and encoder on every tool, driving motor is used for the drive to wait to print the object around the rotary motion of self center pin, the encoder is used for detecting and feeds back the rotation information of waiting to print the object, for example rotatory speed, the angle of having rotated and relevant information such as number of turns, the utility model discloses not prescribing a limit to the concrete structure of tool. Four operation stations are arranged in an equidistant array corresponding to the arrangement of the four jigs, specifically, as shown in the current position in fig. 2, a station P1 is arranged beside the position of the first jig 61 in the figure, and can be designed as a preprocessing station, where some preprocessing work before printing is performed on the object to be printed, such as a quenching work or a dust removing work (specifically, how to operate the operation is not shown in the figure); a station P2, in this embodiment designed as a printing station, is provided next to the position of the second jig 62, which station is provided with a printing unit for ejecting ink droplets to form the desired pattern; a station P3 is arranged beside the position of the third jig 63 in the figure, and can be designed as a complete curing station for completely curing the image and text sprayed on the object to be printed; a station P4 is provided beside the position of the fourth fixture 64 in the figure, and can be designed as a loading and unloading station for loading and unloading the object to be printed.

The following describes a specific operation process of the printing apparatus by taking an object to be printed as an example: firstly, an operator places an object to be printed at a station P4, which is referred to as a first object to be printed, and a motor 66 and a divider 65 which are arranged below a conveying turntable 60 control the conveying turntable 60 to drive a jig to rotate 90 degrees anticlockwise, and then the conveying is stopped, the first object to be printed reaches a station P1 position, the first object to be printed is subjected to preprocessing operation, and the first object to be printed rotates around a self rotation central shaft in the processing process; after the first object to be printed finishes the preprocessing operation, the motor 66 and the divider 65 control the transmission turntable 60 to continue to drive the jig to rotate 90 degrees counterclockwise, then stop transmitting, the first object to be printed reaches the position of the station P2, the printing unit of the station performs the inkjet printing operation on the first object to be printed, and the specific operation process is as follows: the first object to be printed continuously rotates around a self-rotating central shaft at a constant speed, the printing trolley 1 moves from an initial position to an end position along the cross beam 2, namely the X-axis direction, ink drops are sprayed to form images and texts when the first object to be printed passes through the upper part of a region to be printed of the first object to be printed, meanwhile, the printing images and texts can be subjected to pre-curing treatment in the printing process, a UV lamp curing device 7 is arranged below the object to be printed for treatment as shown in figure 1, pre-curing lamps can be arranged on two sides of the printing trolley or beside each nozzle for treatment, after the printing trolley 1 passes through the first object to be printed once, the spray painting operation for printing the images and texts is completed, and the printing trolley 1 moves back to the initial position from the end position along the cross beam 2, namely the X-axis direction to wait for the next object to be printed; after the first object to be printed finishes the printing operation, the motor 66 and the divider 65 control the conveying turntable 60 to continuously drive the jig to rotate 90 degrees anticlockwise, then the conveying is stopped, the first object to be printed reaches a position P3, an ultraviolet curing lamp is arranged at the position to completely cure the image and text sprayed on the first object to be printed, and the first object to be printed rotates around a rotating central shaft of the first object to be printed in the curing process; after the first object of waiting to print accomplishes final solidification operation, motor 66 and decollator 65 control conveying carousel 60 continue to drive tool anticlockwise rotation 90 degrees, then stop the conveying, and the first object of waiting to print gets back to station P4 position again, and the operator carries out the unloading to the first object of waiting to print that the printing process was accomplished here and installs the new object of waiting to print, can adopt manual or automatic mode to go on, the utility model discloses do not specifically prescribe a limit to this.

It should be noted that, the above is only an example of the first object to be printed, when each fixture reaches the station P4, the loading/unloading operation is performed, the objects to be printed are mounted in each fixture during the normal operation, and each operation at different stations is performed simultaneously. Each object to be printed is fixedly installed at the feeding and discharging station P4 and then is intermittently and rotatably transmitted in sequence, the object to be printed returns to the feeding and discharging station P4 for discharging after passing through each operation of the preprocessing station P1, the printing station P2 and the complete curing station P3, when the object to be printed reaches each station in rotation, the transmission device 6 stops transmission, corresponding operation equipment carries out corresponding operation on the object on each jig, the transmission stopping time is determined by the time required by the station with the longest operation time among the four stations, generally determined by the operation time of the printing station, and the required printing time is different according to different patterns and resolutions of printed pictures and texts, so that the transmission stopping time is adjusted accordingly. The conveying speed of the conveying device 6 for each rotary conveying from the previous station to the next station is constant and is always controlled to be the maximum speed as fast as possible.

The arrangement of the printing unit at the printing station will be described in detail below. Fig. 3 shows a bottom view of the print carriage in this embodiment, as shown in the figure, a bottom plate 11 of the print carriage 1 is provided with nozzles 12, in this embodiment, four nozzles are provided, the nozzles 12 are sequentially connected in series at intervals along the length direction thereof, that is, the connection direction of the four nozzles connected in series in sequence is parallel to the rotation central axis direction of the object to be printed, each nozzle can print two colors, the first nozzle on the left is used to spray white (W) ink, or not to spray white ink according to actual needs, the two nozzles in the middle are used to spray magenta (M), yellow (Y), cyan (C), and black (K) ink, and the nozzle on the right is used as a spare nozzle, and can be used to spray transparent (V) ink, or can be used to spray other color inks. The arrangement mode of the spray heads can complete the printing of the whole image-text after the printing trolley passes through the area to be printed once along the X axis in the process that the object to be printed rotates around the central axis of the printing trolley at a constant speed, thereby improving the printing efficiency. An ink box for containing ink and a corresponding negative pressure control system can be arranged on the printing trolley 1. The ink used by the nozzle of the utility model is UV ink. The utility model discloses also can set up the shower nozzle of other quantity, confirm the order of arranging that sets up different colour inks according to the actual demand, this application does not specifically prescribe a limit to this.

The utility model discloses can print treating of different diameters and print the object, before printing the operation, need be according to the diameter size of waiting to print the object, adjust the upper surface that prints object 4 of shower nozzle orifice place plane distance on printing dolly 1 and reach the most suitable printing distance (be 1-3mm usually), because conveyer 6 and tool can not adjust the lift, consequently will print dolly 1 and design for adjustable lift. When the object 4 to be printed is installed or replaced for the first time, a set of nozzle protection mechanism 9 capable of ascending and descending along with the printing trolley 1 is needed to ensure that the bottom surface of the nozzle is not scratched by the object 4 to be printed. As shown in fig. 4-5, the nozzle protection mechanism 9 includes a second sensor 91, a second sensor reflection end 92, a lead screw motor 93, a first limit switch 94, a second limit switch 95, a slider 96, a guide rail 97, and a sensor cover plate 98, in this embodiment, the second sensor 91 is exemplified by a laser distance measurement sensor, and may be other sensors, which is not limited by the present invention. The second sensor 91 is mounted on a lead screw of a lead screw motor 93 through a bracket (not shown in the figure), the lead screw motor 93 can drive the second sensor 91 to move up and down along the vertical direction, namely the Z-axis direction, the lowest end of the lifting range is provided with a first limit switch 94 for limiting, the highest end of the lifting range is provided with a second limit switch 95 for limiting, the bracket connected with the second sensor 91 is also connected with a slide block 96, the slide block 96 moves along a guide rail 97, the guide rail 97 is arranged along the vertical direction, namely the Z-axis direction, for guiding, a transmitting hole 99 is arranged on a sensor cover plate 98, the transmitting hole 99 is a vertically arranged long hole, a light beam 90 transmitted by the transmitting end of the second sensor 91 can be irradiated to the opposite second sensor reflecting end 92 through the transmitting hole 99, then is received by the second sensor 91 after being reflected back, the distance from the light beam to an obstacle (namely the second sensor reflecting end 92) is calculated according to the, if the distance is within the preset range, the fact that no object to be printed is shielded in the middle is proved, and the spray head below the printing trolley is in a safe state and can work normally; if the object to be printed is higher than the light beam 90, the laser reflection distance fed back by the second sensor 91 does not match the set distance, and it is proved that the object to be printed is shielded in the middle, and measures for protecting the nozzle from being collided are required immediately.

It should be noted that, the second sensor 91 can also be a common laser sensor, and the second sensor reflection end 92 is set as a receiving beam end at this time, and it can be a receiving board covering the range of the emission beam of the second sensor transmission end 91 at this time, and also can be set as a receiving device following the second sensor transmission end 91 to go up and down and go up and down synchronously, which is not limited to this.

The operation of the head protection mechanism 9 is described in detail below: firstly, the printing trolley 1 and the second sensor 91 both rise to the highest position along the Z-axis direction, and the height of the plane where the spray hole is located when the printing trolley 1 is at the highest position in the embodiment is higher than the height of the light beam emitted when the second sensor 91 is at the highest position by a distance, which is marked as h; secondly, the object to be printed is conveyed to the printing station P2, the conveying device 6 stops conveying, the control system controls the second sensor 91 to vertically move downwards along the Z-axis direction, when the emitted light beam 90 is shielded by the object to be printed 4, the control system controls the second sensor 91 to stop moving, and the distance of the second sensor 91 moving downwards from the highest position is marked as H; thirdly, the control system controls the second sensor 91 to move upwards to a position which exceeds the upper surface of the object to be printed by a distance of d/2, wherein d represents the distance (usually 1-3 mm) between the upper surface of the object to be printed and the plane where the nozzle holes of the nozzle head are located, and the embodiment can adopt d =1.4 mm; and fourthly, the control system controls the printing trolley 1 to descend from the highest position along the Z-axis direction by the distance H + H-d, namely the spray head reaches the optimal printing position, in the embodiment, the distance between the plane where the spray hole of the spray head of the printing trolley 1 is located and the upper surface of the object to be printed is 1.4mm, the light beam 90 emitted by the second sensor 91 is located at the center between the plane where the spray hole of the spray head is located and the upper surface of the object to be printed, when the height of the object to be printed exceeds the height of the light beam 90, the movement of the printing trolley is stopped, and the function of avoiding the object to be printed from rubbing and colliding with the spray head is achieved.

Print dolly 1 and arrive after the best initial print position of Z axle direction, begin to move towards the direction that is close to waiting to print object 4 and pass through and wait to print object 4 top along printing 2 directions of crossbeam, X axle direction, when waiting to print the region of waiting to print object 4, software control system control shower nozzle sprays the required picture and text of ink droplet formation in proper order, the printing in-process, the motor drive of installation waits to print object 4 around self rotation center pin uniform velocity rotation on the tool, the encoder feedback signal on this tool, after printing dolly 1 pass once, accomplish the printing operation promptly. And then, the conveying device continuously rotates and conveys the object of each jig to the next station for operation. At the moment, the printing trolley 1 returns to the initial printing position along the direction of the cross beam and then rises along the direction of the Z axis, when the next jig is conveyed to the printing station by the conveying device, if the size of the new object to be printed is not abnormal, the light beam 90 cannot be touched, the spray head protection mechanism 9 works normally, the printing trolley 1 reaches the optimal printing position again, and the printing operation is carried out on the new object to be printed below. Repeating the steps until all the objects to be printed in the batch are printed; it should be noted that the printing trolley 1 can also return to the initial printing position along the direction of the cross beam, and does not rise along the direction of the Z axis any more, and if the feedback time of the sensor allows, the risk of protecting the nozzle from being touched can be achieved. The specific motion process depends on actual conditions and tests, and is not limited herein.

When the objects to be printed with different diameters are replaced, the second sensor 91 in the printing trolley 1 and the nozzle protection mechanism 9 needs to be raised to the highest position again, the upper surface position of the object to be printed after the diameter is replaced is found again as described above, then the descending distance of the printing trolley is obtained through calculation by the same principle, and finally the printing trolley is controlled to reach the proper printing height to perform printing operation.

Besides the nozzle protection mechanism 9 for preventing the object to be printed from rubbing the nozzle, another set of protection mechanism for protecting the nozzle hole of the nozzle from being solidified during the irradiation of the UV lamp below the object to be printed in the printing process is provided, which is marked as the nozzle solidification-free protection mechanism, the nozzle solidification-free protection mechanism comprises a first sensor emitting end 01 and a first sensor receiving end 02, as shown in fig. 4, the first sensor emitting end 01 is positioned beside the UV lamp solidification device 7, the first sensor emitting end 01 emits a light beam upwards, the first sensor receiving end 02 is arranged above the printing beam 2 for receiving the light beam emitted by the first sensor receiving end 02, the first sensor receiving end 02 is arranged on the top wall of the printing device supporting frame 5 (as shown in fig. 1), and since the UV lamp solidification device 7 is arranged below the object to be printed 4, in order to prevent the nozzle hole of the nozzle hole from being directly irradiated by the UV lamp from causing dry junction and blockage, it is necessary that the UV lamp can be in an illuminated state when there is a non-transparent object 4 to be printed below the spray head. The specific working principle is as follows: when the non-transparent object 4 to be printed is positioned between the first sensor transmitting end 01 and the first sensor receiving end 02 and shields the light beam emitted by the object, a signal capable of working normally is fed back, and the control system controls the UV lamp to work normally and the printing operation to be carried out normally; if the light beam between the first sensor transmitting end 01 and the first sensor receiving end 02 is not shielded, it indicates that no object to be printed reaches the printing position or the object to be printed is transparent and is not subjected to light-tight treatment, and the UV lamp should not be turned on to irradiate, so that the ultraviolet light emitted by the UV lamp is prevented from directly irradiating the nozzle hole of the spray head to cause drying and blockage of the nozzle hole.

In addition, a sensor is arranged on a supporting plate below the feeding and discharging station P4 on the conveying turntable 60, and an identifier different from other fixtures is arranged below one fixture on the conveying turntable 60 to trigger the sensor, so that the object to be printed on which fixture reaches the printing station can be fed back and calculated.

After all the sensors feed back normally, normal printing can be carried out. Because the driving motor is independently arranged on each jig to drive the object to be printed to rotate, the rotating speed of each object to be printed is different, and when the ink-jet printing operation is carried out, software needs to know the specific rotating parameters of the object to be printed at the printing station at present, so that targeted accurate ink discharging is carried out to ensure the quality of the jet drawing. The utility model discloses respectively set up an independent encoder on every tool and be used for feeding back real-time rotation signal to designed a signal selection board and received the enable signal who waits to print the object on arriving the tool of printing the station, and with the object rotation signal transmission of waiting to print of its encoder feedback to the control panel, to be in and print the object and carry out corresponding china ink control down of waiting to print of station.

The signal selection board is described in detail below. Fig. 6 is a schematic diagram of a signal selecting board, and as shown in the figure, the signal selecting board includes a first dual-layer connection terminal JP1, a second dual-layer connection terminal JP2, a signal selecting terminal JP3, a first chip U20, a second chip U21, a third chip U22, a fourth chip U23, a single-end-to-differential chip U30, a driving chip (not shown in the figure) and an output terminal JP 4. The first double-layer wiring terminal JP1 is connected with the first jig 61 and the second jig 62 and used for receiving signals fed back by the encoders on the first jig 61 and the second jig 62; the second dual-layer terminal JP2 is connected to the third jig 63 and the fourth jig 64, and is used for receiving signals fed back by the encoders on the third jig 63 and the fourth jig 64; the signal selection end JP3 is respectively connected with the first jig 61, the second jig 62, the third jig 63 and the fourth jig 64, the jigs reach a printing station and send enable signals, and the signal selection end JP3 is used for receiving the enable signals sent by which jig and sending the enable signals to the chips of the corresponding jig; the first chip U20 is connected with the upper layer output end and the signal selection end JP3 of the first double-layer wiring terminal JP1, the second chip U21 is connected with the lower layer output end and the signal selection end JP3 of the first double-layer wiring terminal JP1, the third chip U22 is connected with the upper layer output end and the signal selection end JP3 of the second double-layer wiring terminal JP2, the fourth chip U23 is connected with the lower layer output end and the signal selection end JP3 of the second double-layer wiring terminal JP2, the first chip U20, the second chip U21, the third chip U22 and the fourth chip U23 are differential to single-end conversion chips, and are respectively used for receiving an encoder feedback signal sent by the corresponding double-layer wiring terminal and an enable signal sent by the signal selection end at a printing position, the chip receiving the enable signal converts a differential signal fed back by the encoder into a single-end signal and continuously transmits the converted signal to the single-end conversion chip U30 and the differential chip U30, the single-end-to-differential conversion chip U30 receives the A and B single-end signals sent by the encoder on the jig at the printing position and converts the A and B single-end signals into differential signals, and the driving chip is used for receiving the Z signal of the encoder on the jig at the printing position and enhancing the driving capability of the Z signal; the converted and strengthened signal is output to an output terminal JP4, and the output terminal JP4 is an 8pin terminal and is used for being connected with a main board, so that the signal is transmitted to the nozzle main board to control the operation of the printer.

Besides, the circuit board is also provided with a switching power supply circuit, a filter circuit, an expansion circuit, a jumper selection power supply circuit, a matching resistance anti-jamming circuit and the like.

The specific working process is as follows: taking the above four-station printing apparatus as an example, the four stations are preset as a preprocessing station P1, a printing station P2, a complete curing station P3 and a loading and unloading station P4, the first jig 61, the second jig 62, the third jig 63 and the fourth jig 64 which are uniformly arranged in a circumferential array on the transmission turntable rotate intermittently and transmit through the four stations in sequence, each jig is provided with an independent driving motor and an encoder, the encoder feeds back a rotation signal to the jig, a trigger switch (sensor) is arranged below the jig to feed back a signal indicating which jig reaches the printing station P2, the signal is recorded as an enable signal, and the enable signal is transmitted to the signal selection board. Here, the third jig 63 arriving at the printing station P2 will be described as an example: trigger switch (sensor) feedback third tool 63 reaches and prints station P2 department and need to print, signal selection end JP3 receives the enable signal that third tool 63 needs to print, the upper strata of second double-layer wiring terminal JP2 receives the encoder feedback signal on the third tool 63, above-mentioned enable signal and encoder feedback signal transmit for third chip U22, pass through single-ended commentaries on classics difference chip U30 and drive chip processing after with the receivable signal transfer of circuit control board to output terminal JP4, finally carry the lower china ink of giving circuit control board control shower nozzle by output terminal JP 4.

Because each tool all is provided with independent motor and encoder, the rotational speed of waiting to print the object on each tool has the difference, through signal selection board, the selection is in waiting to print the object rotation signal of printing that the station was prepared to print to feed back its rotation signal to circuit control board control in real time and go down the china ink and print, thereby guarantee to wait to print the printing quality of object on this tool.

The utility model discloses conveyer does not inject the quantity of operation station and tool, except that in the embodiment around the center of rotation axle with the circumference array mode set up four tools, also can set up the tool of other quantity, the station that corresponds simultaneously is that the operation is confirmed according to the actual demand.

Fig. 7 is a schematic top view of a conveying device according to another embodiment of the present invention, in which twelve jigs are uniformly arranged on the conveying device 6 in a circumferential array manner, twelve objects to be printed are respectively placed on the jigs, and twelve stations are correspondingly arranged around the conveying device 6 for completing all the operation processes, specifically: the first station S1, the second station S2, the third station S3, the fourth station S4, the fifth station S5, the sixth station S6, the seventh station S7, the eighth station S8, the ninth station S9, the tenth station S10, the eleventh station S11, and the twelfth station S12, wherein the third station S3 to the ninth station S9 are inkjet printing stations (the seven stations may be used or reserved for partial stations, and the ink may include color ink and coating-like ink such as white and transparent color), and the specific arrangement may be as follows: the first station S1 is used for a first pre-process operation before printing, the second station S2 is used for a second pre-process operation before printing (if no pre-process operation is needed or only one pre-process operation is needed, the operation can be omitted), the third station S3 is used for printing ink of a first color, the fourth station S4 is used for printing ink of a second color, the fifth station S5 is used for printing ink of a third color, the sixth station S6 is used for printing ink of a fourth color, the seventh station S7 is used for printing ink of a fifth color, the eighth station S8 is used for printing ink of a sixth color, the ninth station S9 is used for printing ink of a seventh color, the tenth station S10 is used for a full-cure operation, the eleventh station S11 is used for a blanking operation, and the twelfth station S12 is used for a loading operation. The above is just one specific application of the device, and other modes of operation setting can be carried out according to actual needs.

In the aspect of ink discharging control of the twelve-station printing device, similar to the principle of the four-station printing device, each jig is provided with an independent driving motor and an independent encoder, the driving motor drives each object to rotate around a central shaft of the driving motor, the encoder feeds back rotation information of the object to be printed, and a signal selection board is still required to be arranged, as shown in fig. 8, the signal selection board comprises a signal receiving end, a signal selection end, a chip and a signal output end, the number of receiving ports of the signal receiving end is greater than or equal to the set number of the jigs, each receiving port is respectively connected with the encoder arranged on each jig and used for receiving signals sent by each encoder, which jig reaches the printing station according to feedback of a trigger switch and sends an enabling signal, and the signal selection end of the signal selection board is used for receiving the enabling signal sent by each printing station, the signal receiving ends of the corresponding jigs respectively receive encoder feedback signals of the jigs on each printing station, the enabling signals and the encoder feedback signals are respectively transmitted to the corresponding chips, the signals which can be received by the circuit control panel are transmitted to the signal output end after being processed by the conversion chip and the driving chip, and finally the signals are transmitted to the circuit control panel by the signal output end for controlling the spray heads at each printing station to carry out ink-discharging printing operation aiming at the objects to be printed below and the rotation information of the objects.

It is to be noted that any modifications made to the embodiments of the present invention do not depart from the spirit of the present invention and the scope of the appended claims.

Claims (8)

1. The utility model provides an ink jet printing device, includes printing unit and conveyer, its characterized in that, conveyer are a carousel, evenly set up two at least tools with the circumference array mode on the carousel and be used for installing and wait to print the object, carousel intermittent type rotatory conveying tool sets up the operation station the same with tool quantity around conveyer, the operation station includes at least a printing station, and printing station department sets up printing unit, and printing unit is including printing the crossbeam and printing the dolly, and the setting of printing crossbeam is in waiting to print the object top, and the direction of setting is parallel with the rotation center pin of waiting to print the object, installs a printing dolly on the printing crossbeam, and the installation shower nozzle of printing dolly below is used for the air brushing picture and text.

2. Inkjet printing apparatus according to claim 1 wherein the object to be printed is a cylinder, a cone or the area to be printed of the object to be printed is cylindrical, conical in shape.

3. The inkjet printing apparatus of claim 1 wherein the job stations further comprise a pre-treatment station, a curing station, and a loading and unloading station.

4. The inkjet printing apparatus as claimed in claim 1, wherein each of the jigs is independently connected to a driving motor and an encoder, the driving motor is used for driving the object to be printed to rotate around its central axis, and the encoder is used for detecting and feeding back a rotation signal of the object to be printed.

5. The inkjet printing apparatus as claimed in claim 4, wherein the signal fed back from the encoder is transmitted to a signal receiving board, the signal receiving board receives an enable signal sent from the print station, the enable signal is used to feedback which jig is at the print position for printing, the signal receiving board receives the signal sent from the encoder on the jig and performs signal conversion and transmission, and the transmitted signal is transmitted to the circuit control board for controlling the nozzle to discharge ink.

6. Inkjet printing apparatus according to claim 1 wherein a divider and a motor are provided below the turntable for controlling the transport and stop of the turntable, the stop time of the turntable being the longest operating time in each station.

7. Inkjet printing apparatus according to claim 1 wherein the number of work stations provided is the same as the number of jigs provided on the conveyor.

8. Inkjet printing apparatus according to claim 1 wherein the number of stops for one revolution of the carousel is the same as the number of stations to be set.

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