CN109515012B

CN109515012B - High-temperature glass digital ink-jet printer

Info

Publication number: CN109515012B
Application number: CN201811613492.6A
Authority: CN
Inventors: 樊臻; 李泽震; 刘进添; 许渠勉; 王水明
Original assignee: Hangzhou Walangge Intelligent Manufacturing Co ltd
Current assignee: Hangzhou Walangge Intelligent Manufacturing Co ltd
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2023-06-09
Anticipated expiration: 2038-12-27
Also published as: CN109515012A

Abstract

The invention provides a high-temperature glass digital ink-jet printer which is used for printing pictures for glass with various sizes and comprises a bottom frame module, a triaxial movement module, a carriage and an upper computer, wherein the bottom frame module comprises a horizontally placed frame, a glass fixing device and a glass conveying device, the glass fixing device is used for fixing the glass when the printer prints, and the glass conveying device is used for driving the glass to translate; the three-axis motion module comprises an X-axis motion module, a Y-axis motion module and a Z-axis motion module, the three-axis motion module enables the carriage to move in the X-axis, Y-axis and Z-axis directions, the carriage comprises a frame, an ink box assembly, a hot air gun assembly and a printing nozzle assembly, the carriage is used for executing printing actions, and the upper computer controls the printer to execute specified actions.

Description

High-temperature glass digital ink-jet printer

Technical Field

The invention relates to a printer, in particular to a high-temperature glass digital ink-jet printer.

Background

The high temperature glass digital ink jet printer is one kind of equipment capable of printing color pattern on the surface of toughened glass medium and is mainly used in furniture building material market, advertisement board market and personalized market. The ink jet printer adopts a non-contact printing mode, the printing is controlled by a computer, the ink in the nozzle is sprayed on a glass plate by utilizing the characteristics of piezoelectric ceramics to form various vivid images, but the existing high-temperature glass ink jet printer has the problems of low printing speed, single color, serious environmental pollution and the like, and in order to adapt to glass with various sizes, improve the printing efficiency and the printing precision, the high-temperature glass digital ink jet printer needs to be provided.

Disclosure of Invention

The invention provides a high-temperature glass digital ink-jet printer, which realizes the functions of positioning, fixing and conveying glass in the printing process through a chassis module, realizes the accurate movement of a carriage in the X-axis, Y-axis and Z-axis directions in the printing process through a triaxial movement module, executes continuous printing actions through the carriage, and realizes the control of the execution of appointed actions of the printer through an upper computer.

The invention provides a high-temperature glass digital ink-jet printer which is used for printing pictures for glass with various sizes and comprises a base frame module, a triaxial movement module, a carriage and an upper computer, wherein the base frame module comprises a horizontally placed frame, a glass fixing device and a glass conveying device, a printing area is arranged on the frame, the glass fixing device is arranged on the printing area and is used for fixing the glass when the printer prints, and the glass conveying device is arranged on the printing area and is staggered with the glass fixing device and is used for driving the glass to translate;

the three-axis motion module comprises a pair of mutually parallel supporting beams, a cross beam, an X-axis motion module, a pair of Y-axis motion modules and a Z-axis motion module, wherein the pair of mutually parallel supporting beams are longitudinally arranged near two sides of the frame, the cross beam is arranged to cross the underframe and the pair of supporting beams in a sliding mode, and a coordinate system is defined: the direction along which the supporting beam extends is a Y axis, the direction along which the cross beam extends is an X axis, the direction perpendicular to the Y axis and the X axis is a Z axis, the pair of Y axis movement modules are respectively arranged at the sliding connection part of the cross beam and the pair of supporting beams, the Y axis movement modules are used for driving the cross beam to move along the Y axis, the carriage is arranged on the cross beam, the X axis movement modules are arranged between the carriage and the cross beam and used for driving the carriage to move along the X axis, the Z axis movement modules are also arranged between the X axis movement modules and the carriage and used for driving the carriage to move along the Z axis on the basis of moving along the X axis, and the three-axis movement realizes the movement of the carriage along the X, Y, Z three-axis direction; the carriage comprises a carriage body, an ink box assembly and a printing nozzle assembly, wherein the ink box assembly is arranged on the carriage body and is used for loading ink required by a printer and conveying the ink to the printing nozzle assembly, the printing nozzle assembly comprises a preset number of printing nozzles, and the printing nozzles are arranged below the carriage body and are used for executing ink jet action; the upper computer controls the glass fixing device to execute fixing action through a control module, controls the glass conveying device to execute conveying action, controls the X-axis module to execute X-axis displacement, controls the Y-axis module to execute Y-axis direction displacement, controls the Z-axis module to execute Z-axis direction displacement, controls the ink box module to execute ink conveying action, and controls the printing nozzle module to execute ink spraying action.

Preferably, the glass fixing device comprises a plurality of glass fixing units which are uniformly arranged and parallel to each other and a fixing underframe which is fixedly arranged on the frame, the glass fixing units comprise a fence which is horizontally and longitudinally arranged on the fixing underframe, a plurality of universal rollers which are arranged on the fence and have upward wheel surfaces, a preset number of vacuum chucks and chuck jacking air cylinders which are in one-to-one correspondence with the vacuum chucks, the universal rollers are arranged on the upper end surface of the fence through screws, the universal rollers are used for bearing the glass, the vacuum chucks are fixedly connected with the chuck jacking air cylinders and are arranged on one side of the fence, the chuck jacking air cylinders drive the vacuum chucks to lift so that the plane selectivity of the vacuum chucks is higher than that of the universal rollers, after the glass reaches a preset position, the chuck jacking air cylinders jack the vacuum chucks, the glass is sucked and fixed, and after printing is finished, the vacuum chucks loosen the glass and reset through the chuck jacking air cylinders.

Preferably, the glass conveying device comprises a conveying underframe, a jacking module, a transmission module and a synchronous conveying module, wherein the jacking module comprises a plurality of conveying jacking air cylinders fixedly installed on the frame, the bottom of the conveying underframe is fixedly connected with the conveying jacking air cylinders, the jacking module is driven by the conveying jacking air cylinders to enable the plane selectivity of the glass conveying device to be higher than that of the glass fixing device, the transmission module comprises a transmission motor, a transmission speed reducer, a transmission rod horizontally arranged and a pair of bearing blocks, an output shaft of the transmission motor is connected with the transmission speed reducer, the transmission motor and the speed reducer are installed on the conveying underframe in a threaded connection mode, the bearing blocks are symmetrically arranged on two sides of the conveying underframe respectively, and the transmission rod is in penetrating fit with the speed reducer and is fixed on the bearing blocks; the synchronous belt conveying module comprises a plurality of synchronous belt conveying units which are arranged on the conveying underframe and are staggered with the glass fixing units, the synchronous belt conveying units comprise a horizontally and longitudinally arranged guide rail, a guide rail bracket fixedly arranged on the conveying underframe, a main synchronous pulley, a plurality of auxiliary synchronous pulleys and a synchronous belt, the guide rail bracket is fixedly arranged on the conveying underframe, the guide rail is fixedly arranged at one end, far away from the conveying underframe, of the guide rail bracket, the main synchronous pulley is arranged on the transmission rod and is positioned under the sliding rail, the auxiliary synchronous pulley is fixedly arranged on the guide rail, the synchronous belt is sleeved with the main synchronous pulley and the auxiliary synchronous pulley, and when the glass conveying device works, the conveying jacking cylinder of the jacking module jacks up the whole glass conveying device until the glass conveying device is higher than the glass fixing device, the glass jacking cylinder is started up, the transmission motor is driven to rotate by the transmission rod, and the main synchronous pulley is driven by the auxiliary synchronous pulley to slide along with the transmission rod, so that the glass conveying device is transmitted.

Preferably, the Y-axis motion module comprises a Y-axis motion block, a Y-axis servo motor, a Y-axis speed reducer, a Y-axis gear, a Y-axis rack engaged with the Y-axis gear and a Y-axis grating ruler, wherein one surface of the Y-axis motion block is connected with the cross beam, one surface of the Y-axis motion block, which is far away from the cross beam, is installed on the support beam and slides along the Y-axis direction, an output shaft of the Y-axis servo motor is connected with the Y-axis speed reducer, the Y-axis speed reducer is installed on the Y-axis motion block, an output shaft of the Y-axis speed reducer is arranged towards the support beam and is provided with the Y-axis gear, the Y-axis rack is installed on the support beam and extends along the Y-axis direction, the Y-axis servo motor drives the Y-axis gear to rotate, the cross beam slides along the support beam and realizes the motion of the carriage in the Y-axis direction, the Y-axis grating ruler comprises a Y-axis grating ruler and a Y-axis grating read head, the Y-axis servo motor is arranged on the support beam and is installed on the Y-axis servo motor and is matched with the Y-axis grating reader in the Y-axis direction by the closed loop, and the position of the Y-axis grating is controlled by the optical grating reader;

The X-axis motion module comprises an X-axis linear motor, an X-axis moving block and an X-axis grating ruler, the X-axis linear motor comprises an X-axis motor stator and an X-axis motor rotor matched with the X-axis motor stator, the X-axis motor stator is arranged on the cross beam and extends along the X-axis direction, one surface of the X-axis moving block is arranged on the X-axis motor rotor, the other surface of the X-axis moving block is sequentially provided with the Z-axis motion module and a character car, the X-axis linear motor drives the X-axis moving block to drive the character car to move along the X-axis direction, the X-axis grating ruler comprises an X-axis scale grating and an X-axis grating reading head, the X-axis scale grating is arranged on the cross beam, two ends of the X-axis scale grating reading head extend along the X-axis direction, the X-axis grating reading head is arranged on the X-axis moving block through an X-axis grating mounting code and is matched with the X-axis grating, the position information of the character car on the cross beam is measured by utilizing the optical principle of the grating and fed back to the upper computer, and simultaneously the upper computer precisely controls the X-axis grating to move along the X-axis direction in a closed loop;

the Z-axis motion module comprises a Z-axis adapter plate, a Z-axis screw motor group and a Z-axis position sensor, one surface of the Z-axis adapter plate is slidably mounted on the X-axis moving block, the other surface of the Z-axis adapter plate is provided with the carriage, the Z-axis screw motor group comprises a Z-axis servo motor, a Z-axis screw and a Z-axis nut matched with the Z-axis screw, the Z-axis screw is rotatably mounted on the X-axis moving block along the Z-axis direction, the Z-axis nut is mounted on the Z-axis screw and is connected with the carriage, the Z-axis servo motor is mounted on the X-axis moving block, an output shaft of the Z-axis servo motor is connected with the Z-axis screw through a coupler and is used for driving the Z-axis screw to rotate, the Z-axis nut is used for driving the carriage to move along the Z-axis direction, the Z-axis position sensor is mounted on one end surface of the carriage facing the glass and is used for collecting distance information between the carriage and the glass, the distance information is fed back to the upper motor, and the upper position motor is always used for controlling the thickness of the carriage to be different from the Z-axis servo motor.

Preferably, the ink cartridge assembly comprises a predetermined number of ink cartridge units, the ink cartridge units comprise a main ink cartridge, a first ink pump, a filter, a sub-ink cartridge set, a second ink pump, a first negative pressure controller, a second negative pressure controller, and a pressure ink controller, the sub-ink cartridge set comprises an ink inlet and an ink outlet of the main ink cartridge, the ink inlet cartridge comprises an ink inlet and an ink inlet of the main ink cartridge, the ink outlet of the ink outlet cartridge comprises an ink inlet and an ink outlet of the ink outlet cartridge, the ink outlet of the main ink cartridge is connected with the ink inlet of the ink outlet cartridge through the first ink pump, the filter, and the ink outlet of the ink inlet cartridge is connected with the ink inlet of the ink outlet cartridge through the printing nozzle, and the ink outlet of the ink outlet cartridge is connected with the main ink inlet through the second ink pump so as to make the ink return to the main ink cartridge; the ink inlet ink box is connected with the first negative pressure controller, the ink extraction ink box is connected with the second negative pressure controller, and circulation of an ink path is realized by adjusting the pressure difference between two negative pressures of the first negative pressure controller and the second negative pressure controller; the ink inlet ink box is also connected with the ink pressing controller to provide positive pressure for the ink inlet ink box, and the ink pressing action is realized under the action of the positive pressure, so that when the printing nozzle is not filled with ink, the ink is injected into the printing nozzle.

Preferably, the high-temperature glass digital ink-jet printer comprises an ink scraping device, the ink scraping device comprises an ink scraping support, an ink scraping jacking cylinder, a platform support and a scraper component, the ink scraping support is connected with the cross beam, the ink scraping jacking cylinder is installed on the ink scraping support, a piston rod of an output end of the ink scraping jacking cylinder faces to the carriage, the ink scraping jacking cylinder is connected with the platform support, a waste liquid tank for collecting waste liquid is arranged on the platform support, a drain valve is further arranged at the bottom of the waste liquid tank, the scraper component comprises an ink scraping cylinder installed on the platform support, a scraper frame is connected with the piston rod of the output end of the ink scraping cylinder, the scraper frame is installed on the waste liquid tank in a sliding mode, a soft preset number of scraping knives are installed on the scraper frame corresponding to the printing spray heads, and automatic ink scraping and cleaning operations are executed: the ink scraping lifting cylinder drives the platform supporting frame to ascend, so that the blade of the ink scraping knife is abutted to the corresponding printing spray head, at the moment, the ink scraping cylinder stretches and stretches to drive the scraper frame to slide on the waste liquid tank, the ink scraping knife scrapes waste liquid on the printing spray head and stores the waste liquid in the waste liquid tank, and the ink scraping lifting cylinder drives the platform to support and descend, so that the cleaning operation of the printing spray head is completed.

Preferably, the ink box unit further comprises an ink box cleaning device, a first two-position three-way valve and a second two-position three-way valve, the first two-position three-way valve and the second two-position three-way valve comprise a first liquid inlet, a second liquid inlet and a liquid outlet, the ink box cleaning device comprises a cleaning liquid storage tank filled with cleaning liquid, a filter, a cleaning pump and a throttle valve, the first liquid inlet, the second liquid inlet and the liquid outlet of the first two-position three-way valve are respectively connected with the ink inlet box, the cleaning liquid storage tank and the printing spray head, and the first liquid inlet, the second liquid inlet and the liquid outlet of the second two-position three-way valve are respectively connected with the ink pumping box, the printing spray head and the waste liquid tank.

Preferably, the ink feeding ink box and the ink extracting ink box are consistent in structural design, each ink feeding ink box comprises an ink box cavity, a stirring assembly, an upper cover mounting seat and a liquid level detection module, the bottom of the ink box cavity is mounted on the substrate, an opening end of the ink box cavity, which is far away from the bottom, is further provided with the upper cover mounting seat in a sealing mode, the stirring assembly comprises a stirring impeller, a rotating shaft connected with the stirring impeller and magnetic steel arranged between the bottom of the ink box cavity and the substrate, one end of the rotating shaft, which is far away from the stirring impeller, is mounted on the upper cover mounting seat through a bearing in a matching mode, when the magnetic steel rotates, the stirring impeller rotates under the magnetic force of the magnetic steel so as to realize stirring of ink, the liquid level detection module comprises a liquid level sensor and a floater, the liquid level sensor is mounted on the upper cover mounting seat, the floater is sleeved on the rotating shaft, when the floater rises along with the quantity of the ink, the floater triggers the sensor to preset the liquid level sensor, the liquid level sensor sends out a liquid level signal of the ink feeding ink box, and the liquid level sensor sends out a liquid level signal of the ink feeding ink box.

Preferably, the high-temperature glass digital ink-jet printer further comprises a moisturizing device, the moisturizing device is close to one of the supporting beams, is provided with a non-working area, is positioned below the frame, and is used for moisturizing the printing spray heads of the printing spray head assembly, the moisturizing device comprises a moisturizing support, a moisturizing jacking cylinder, a moisturizing liquid storage tank, a waste liquid collecting tank and a moisturizing assembly, the moisturizing support is mounted on the cross beam, the moisturizing jacking cylinder is mounted on the moisturizing support, the output end of the moisturizing jacking cylinder faces the frame, the moisturizing assembly comprises a moisturizing mounting plate and moisturizing heads which are arranged on the moisturizing mounting plate in a one-to-one correspondence manner with the printing spray heads, the moisturizing mounting plate is detachably mounted at the output ends of the moisturizing jacking cylinders, when moisturizing operation is performed, the moisturizing jacking cylinders jack the moisturizing mounting plate so as to realize the matching of the moisturizing heads with the corresponding printing spray heads, each moisturizing head is provided with a liquid inlet and a liquid outlet, the moisturizing head is arranged on the moisturizing support, the moisturizing jacking cylinder is connected with the moisturizing head through the moisturizing head by the moisturizing collecting tank and the moisturizing head in turn, the moisturizing head is connected to the moisturizing head through the moisturizing head by the suction valve, the moisturizing head is connected to the moisturizing head in series to the collecting tank after the moisturizing head is sequentially connected to the moisturizing head through the moisturizing head, the moisturizing head is sequentially arranged at the suction head and the moisturizing head, and the moisturizing head is connected to the waste liquid collecting tank in the suction pump in the liquid collecting tank, the electromagnetic valve is opened, and the liquid extracting pump is used for extracting the waste liquid in the moisturizing heads into the waste liquid collecting tank.

Preferably, the high-temperature glass digital ink-jet printer further comprises a glass positioning device, the glass positioning device comprises a transverse positioning strip, a longitudinal positioning strip, a first cylinder group matched with the transverse positioning strip and a second cylinder group matched with the longitudinal positioning strip, the second cylinder group is arranged on a first side parallel to the fence of the fixed underframe, the first cylinder group is arranged on a second side adjacent to the first side of the fixed underframe, the longitudinal positioning strip is horizontally and longitudinally arranged and fixedly connected with the second cylinder group, the transverse positioning strip is horizontally and transversely arranged and fixedly connected with the first cylinder group, and the first cylinder group and the second cylinder group drive the transverse positioning strip and the longitudinal positioning strip to lift, so that the glass is positioned at a printing starting position through a transverse stop block arranged on the transverse positioning strip and a longitudinal stop block arranged on the longitudinal positioning strip.

The high-temperature glass digital ink-jet printer provided by the invention realizes the bearing of the glass through the universal rollers of the glass fixing device, and the glass can be positioned by moving the universal rollers, so that labor is saved when the original printing position of the glass is positioned, the cylinder of the glass fixing device drives the vacuum chuck to lift so that the plane selectivity of the vacuum chuck is higher than that of the universal rollers, when the glass reaches the preset position, the cylinder lifts the vacuum chuck, the vacuum chuck sucks and fixes the glass, when the printing is finished, the vacuum chuck loosens the glass and resets through the cylinder, the glass is in a stable and static state when the printing is accepted, the printing precision is improved, when the glass conveying device is required to be fed or printed, the jacking module jacks the glass conveying device until the glass conveying device is higher than the glass fixing device and jacks the glass, the transmission motor is started and drives the transmission rod to rotate, the main synchronous belt wheel rotates along with the transmission rod and is matched with the auxiliary synchronous belt wheel to drive the synchronous belt to slide, automatic transmission of the glass is realized, the automation degree of a glass printing conveying process is higher, the input of manpower resources is saved, the printing efficiency is improved, and the three-axis movement module is provided with a Y-axis movement module which is provided with a Y-axis movement block, a Y-axis servo motor, a Y-axis speed reducer, a Y-axis gear, a transmission rod and a transmission rod, the Y-axis rack, the Y-axis grating ruler and the upper computer are meshed with the Y-axis gear to realize the movement of the carriage in the Y-axis direction and closed-loop control; the X-axis movement module realizes the movement of the carriage in the X-axis direction and closed-loop control through an X-axis linear motor, an X-axis moving block and an X-axis grating ruler; the Z-axis motion module realizes the movement and closed-loop control of the carriage in the Z-axis direction through the Z-axis adapter plate, the screw motor module, a position sensor and the upper computer, and the three-axis motion module can realize the high-precision motion control of the carriage, so that the printed pattern is clearer and the color is more vivid; the carriage is designed to have the ink supply paths connected with the main ink box, the auxiliary ink box group and the printing nozzle, so that the ink continuously flows all the time, and the deposition blocking phenomenon is reduced; the auxiliary ink box group provides two mutually independent negative pressures, under the different negative pressure conditions of the auxiliary ink box group, the circulation of the ink path is more stable, the uniform hot air continuously blown out to glass by the hot air gun component and the inclined plate is effective, and the printing efficiency and the printing quality of the ink box are improved by the ink box component and the hot air gun component.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a digital ink-jet printer of high temperature glass provided by the invention;

fig. 2 is a schematic view of a chassis module structure;

FIG. 3 is a schematic view of a fixed chassis structure of the chassis frame and glass fixture of the chassis module of FIG. 2;

FIG. 4 is a schematic view of a glass fixing device of a digital ink-jet printer for high temperature glass;

FIG. 5 is a schematic view of a partial structure of a glass fixing apparatus;

FIG. 6 is a schematic view of the overall structure of the glass conveying device;

FIG. 7 is a schematic view of a timing belt conveying unit of the glass conveying apparatus;

FIG. 8 is a schematic diagram of the overall structure of a three-axis motion module;

FIG. 9 is a schematic view of the structure of one of the support beams arranged in the Y-axis direction;

FIG. 10 is a schematic view of a partial structure of a Y-axis motion module on a support beam;

FIG. 11 is a schematic perspective view of a beam disposed in the X-axis direction;

FIG. 12 is a schematic view of a partial structure of an X-axis motion module on a beam;

FIG. 13 is an exploded view of the Z-axis motion module;

FIG. 14 is a schematic view of a Z-axis motion module;

FIG. 15 is a schematic view of the cartridge assembly;

FIG. 16 is a schematic view of the structure of the main ink cartridge;

FIG. 17 is a schematic diagram of an ink circuit circulation system;

FIG. 18 is an exploded view of the secondary cartridge assembly, agitator assembly and synchronizing wheel mechanism;

FIG. 19 is an exploded view of the stirring assembly;

FIG. 20 is an ink path circulation step diagram of the ink cartridge assembly;

FIG. 21 is a schematic view of the position of the squeegee assembly relative to the cart;

FIG. 22 is an exploded view of the ink scraping device;

FIG. 23 is a schematic view of a portion of a carriage;

FIG. 24 is a schematic diagram of a print head internal cleaning system;

FIG. 25 is a schematic view of the position structure of the moisturizing device relative to the cart;

fig. 26 is a schematic structural view of the moisturizing device.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The invention provides a high-temperature glass digital ink-jet printer which is further described with reference to the accompanying drawings, and the technical scheme and the design principle of the invention are described in detail by only one optimized technical scheme.

For convenience of description, the high-temperature glass digital ink-jet printer is simply referred to as a printing device, and a coordinate system is established with reference to the orientation of the printing device provided in fig. 1 and 8: the direction along which the support beam 21 of the triaxial movement module 2 extends is a Y axis, the direction along which the cross beam 22 extends is an X axis, and the directions perpendicular to the Y axis and the X axis are Z axes.

Referring to fig. 1, the printing apparatus provided by the invention is used for printing pictures for glass with various sizes, and comprises a base frame module 1 for bearing the glass, a triaxial movement module 2, a carriage 3, an ink scraping device 4, a moisture preserving device 5, a power distribution cabinet 6 and an upper computer 7.

Referring to fig. 2 and 3, the chassis module 1 includes a horizontally disposed frame 11, a glass fixing device 13, a glass conveying device 14, and a glass positioning device 12; a printing area is arranged on the frame 11, and the glass fixing device 13 and the glass conveying device 14 are arranged on the printing area, wherein the frame comprises a front frame 111 and a rear frame 112 which are connected through a connecting plate 113; the glass fixing devices 13 are disposed in pairs on the front frame 111 and the rear frame 112, respectively, and the glass conveying devices 14 are disposed in pairs on the front frame 111 and the rear frame 112, respectively.

Referring to fig. 2, 3 and 5, the glass fixing device 13 comprises a plurality of glass fixing units and fixing bottom frames 135 which are uniformly arranged and parallel to each other, four corners on a printing area of the frame 11 are respectively provided with a glass leveling block 138, the fixing bottom frames 135 of the glass fixing device 13 are connected with the frame 11 through the glass leveling blocks 138, the glass fixing units comprise a fence 132 horizontally and longitudinally arranged on the fixing bottom frames 135, a plurality of universal rollers 131 installed on the fence 132 and having upward wheel surfaces, a preset number of vacuum suckers 133 and sucker lifting cylinders 134 corresponding to the vacuum suckers one by one, wherein the fixing bottom frames 135 are uniformly provided with cylinders 136 with upward protruding threaded holes, the fence 132 is fixedly installed on the fixing bottom frames through matching of screws and the cylinders 136 with the threaded holes, the universal rollers 131 are arranged on the upper end face of the fence 132 through screws, the universal rollers 131 are used for bearing the glass, the vacuum suction cup 133 is fixedly connected with the suction cup lifting cylinder 134 and is arranged on one side of the fence 132, the suction cup lifting cylinder 134 drives the vacuum suction cup 133 to lift so that the plane where the vacuum suction cup 133 is located is selectively higher than the plane where the universal rollers 131 are located, when the glass reaches a preset position, the suction cup lifting cylinder 134 lifts the vacuum suction cup 133, the vacuum suction cup 133 sucks and fixes the glass, when printing is finished, the vacuum suction cup 133 loosens the glass and is reset through the suction cup lifting cylinder 134, in addition, the height of the glass leveling block 138 can be freely adjusted, when the glass fixing device 13 is arranged, the height is adjusted through the glass leveling block 138, the glass fixture 13 is brought to a level.

Referring to fig. 2, 3, 6 and 7, a plurality of conveying device corner brackets 116 are installed on the inner side of the frame 11, the glass conveying device comprises a conveying chassis 141, a jacking module, a transmission module and a synchronous conveying module, the jacking module comprises a plurality of conveying jacking cylinders 142, the bottom of the conveying chassis 141 is connected with the conveying jacking cylinders 142, the bottom of the conveying jacking cylinders 142 is fixedly installed on the conveying device corner brackets 116, the jacking module drives the glass conveying device 14 to be located in a plane which is higher than the plane where the glass fixing device 13 is located through the conveying jacking cylinders 142, the transmission module comprises a transmission motor 143, a transmission reducer 147, a transmission rod 144 horizontally arranged and a pair of bearing blocks 145, the output shaft of the transmission motor 143 is connected with the transmission reducer 147, the transmission motor 143 and the reducer 147 are installed on the conveying chassis 141 through threaded connection, the bearing blocks 145 are symmetrically arranged on two sides of the conveying chassis 141 respectively, and the transmission rod 144 penetrates through and is fixed on the reducer 147; the synchronous belt conveying module comprises a plurality of synchronous belt conveying units 146 which are arranged on the conveying underframe 141 and are staggered with the glass fixing units, the synchronous belt conveying units comprise a guide rail 1461 which is horizontally and longitudinally arranged, a guide rail bracket 1462 which is fixedly arranged on the conveying underframe 141, a main synchronous belt 1463, a plurality of auxiliary synchronous belt 1464, a pair of idle gears 1465 and a synchronous belt 1466, the guide rail bracket 1462 is fixedly arranged on the conveying underframe 141, the guide rail 1461 is fixedly arranged at one end of the guide rail bracket 1462 far away from the conveying underframe 141, the main synchronous belt 1463 is arranged on the driving rod 144 and is positioned under the sliding rail 1461, the auxiliary synchronous belt 1464 is fixedly arranged on the guide rail 1461, the synchronous belt 1466 is sleeved on the outer side of the main synchronous belt 1463 and the auxiliary synchronous belt 1464, the pair of idle gears 1465 are symmetrically arranged between the auxiliary synchronous belt 1464 and the main synchronous belt 1463 along the horizontal direction, the pair of idle gears 1466 are used for tensioning the synchronous belt 1466, when the driving rod 1466 is in tension, the driving rod 14614 is lifted up, the driving rod 14614 is driven by the driving rod 1464 to rotate, and the driving rod 14 is driven by the driving rod 14614 to rotate, and the driving rod 147 is driven by the driving rod 14 to rotate.

Referring to fig. 2, 3 and 4, the glass positioning device 12 includes a horizontal positioning bar 122, a longitudinal positioning bar 121, a first cylinder group 124 matching with the horizontal positioning bar 122, and a second cylinder group 123 matching with the longitudinal positioning bar 121, the second cylinder group 123 is mounted on a first side of the fixed chassis 135 parallel to the fence through the positioning device corner bracket 114, the first cylinder group 124 is mounted on a second side adjacent to the first side of the fixed chassis 135 through the positioning device corner bracket 114, the longitudinal positioning bar 121 is horizontally and longitudinally placed and fixedly connected with the second cylinder group 123, the horizontal positioning bar 122 is horizontally and transversely placed and fixedly connected with the first cylinder group 124, the first cylinder group 124 and the second cylinder group 123 drive the horizontal positioning bar 122 and the longitudinal positioning bar 121 to lift, and the glass is positioned at a printing start position through a horizontal stop 126 disposed on the horizontal positioning bar 122 and a longitudinal stop 125 disposed on the longitudinal positioning bar 121.

Referring to fig. 1, 8, 11 and 13, the triaxial movement module 2 includes a pair of mutually parallel support beams 21 longitudinally disposed adjacent to both sides of the frame 11, a cross beam 22 slidably mounted across the frame 11 and the pair of support beams 21, an X-axis movement module 27, a pair of Y-axis movement modules 26 and a Z-axis movement module 28.

Referring to fig. 1, 8, 11 and 12, the cross beam 22 is slidably mounted on the pair of support beams 2 across the two ends of the frame 11 through a Y-axis sliding rail 262 and a predetermined number of Y-axis sliding blocks 263 slidably engaged with the Y-axis sliding rail 262, the Y-axis sliding rail 262 is disposed on the support beams 21 along the Y-axis direction, the sliding blocks 262 are connected with the Y-axis moving module 26, the Y-axis moving module 26 is used for driving the cross beam 22 to move along the Y-axis, a pair of X-axis sliding rails 271 and a predetermined number of X-axis sliding blocks 272 slidably engaged with the pair of X-axis sliding rails 271 are mounted on one side of the cross beam 22 along the X-axis direction, the X-axis sliding blocks 272 are connected with the X-axis moving module 27, a pair of Z-axis sliding rails 281 and a predetermined number of Z-axis sliding blocks 81A slidably engaged with the Z-axis sliding rails 281 are disposed on the X-axis moving module 27, the Z-axis sliding blocks 81A are connected with the Z-axis moving module 28, the carriage 3 is mounted on the Z-axis moving module 28, and the carriage 3 is connected with the X-axis moving module 38 and the cross beam 22 along the Z-axis direction 38, and the X-axis moving module 28 is independently arranged along the Z-axis direction and the X-axis direction 7. Referring to fig. 1 to 4, a Y-axis movement module 26 is respectively disposed at the connection between the cross beam 22 and the pair of support beams 2, the pair of Y-axis movement modules 26 are mirror images, in this embodiment, only one of the Y-axis movement modules 26 is described in detail, and the Y-axis movement module 26 includes: the Y-axis moving block 260, a Y-axis servo motor 269, a decelerator 268, a gear 265, a rack 261 meshed with the gear 265 and a Y-axis grating ruler, wherein one surface of the Y-axis moving block 260 is connected with the cross beam 22, the surface of the Y-axis moving block far away from the cross beam 22 is arranged on the Y-axis sliding blocks 263 and slides along the Y-axis direction along with the Y-axis sliding blocks 263, the output shaft of the Y-axis servo motor 269 is connected with the input shaft of the decelerator 268, the decelerator 268 is arranged on the Y-axis moving block 260, the output shaft of the decelerator 268 is arranged towards the supporting beam 2 and is provided with the gear 265, the rack 261 is arranged on the supporting beam 2 and extends along the Y-axis direction, two ends of the rack 261 are respectively provided with a Y-axis limit stop 224 to realize the mechanical limit of the Y-axis direction, the Y-axis servo motor 269 drives the gear 265 to rotate, the cross beam 22 slides along the supporting beam 2 through the meshing transmission of the gear 265 and the rack 261, so that the carriage 3 moves in the Y-axis direction, the Y-axis grating ruler comprises a Y-axis scale grating 264 and a Y-axis grating reading head 266, the Y-axis scale grating 264 is arranged on the supporting beam 2 and is parallel to the rack 261, the Y-axis grating reading head 266 is arranged on the Y-axis moving block 260 through a Y-axis grating mounting code 267 and is matched with the Y-axis scale grating 264, the position information of the cross beam 22 on the supporting beam 2 is measured by utilizing the optical principle of the grating and fed back to the upper computer 7, and meanwhile, the upper computer 7 performs servo control on the Y-axis servo motor 269 so that the carriage 3 is controlled in a high-precision closed loop in the Y-axis direction.

In order to realize the motion safety and the control of the origin return of the Y-axis motion module 26 in the Y-axis direction, a Y-axis in-place sensor (not shown) is further disposed on the Y-axis motion module 26, in this embodiment, the Y-axis in-place sensor (not shown) is a groove-type photoelectric sensor, the Y-axis in-place sensor (not shown) may be mounted on the Y-axis moving block 260, a trigger point is disposed at a position of the support beam 2 near two end portions, or the Y-axis in-place sensor (not shown) is disposed at a position of the support beam 2 near two end portions, and a corresponding trigger point (not shown) is disposed on the Y-axis moving block 260.

Referring to fig. 1, 9, 11 and 12, the X-axis motion module 27 includes: the X-axis linear motor comprises an X-axis motor stator 272 and an X-axis motor rotor 274 matched with the X-axis motor stator 272, the X-axis motor stator 272 is installed on the cross beam 22 and extends along the X-axis direction, two ends of the X-axis motor stator 272 are respectively provided with an X-axis limit stop 242 for realizing mechanical limit in the X-axis direction, the X-axis moving block 270 is installed on the X-axis sliding blocks 272, the X-axis motor rotor 274 is installed on the X-axis moving block 270, one surface of the X-axis moving block 270 far away from the X-axis motor rotor 274 is sequentially provided with the Z-axis moving module 28 and the character car 3, the X-axis linear motor drives the character car 3 to move along the X-axis direction, the X-axis grating rotor comprises an X-axis scale grating 275 and an X-axis grating (not shown), the X-axis scale grating 275 is arranged on the cross beam 22 and extends along the X-axis direction, the X-axis scale grating 275 is installed on the cross beam 22 through the X-axis grating rotor 7 and is matched with the X-axis grating rotor 3 in the position of the X-axis linear motor rotor 274, and the precision is realized on the X-axis linear motor rotor is controlled by the position of the X-axis grating rotor 7.

In order to realize the motion safety and the control of the origin return of the X-axis motion module 27 in the X-axis direction, an X-axis in-place sensor (not shown) is further disposed on the X-axis motion module 27, in this embodiment, the X-axis in-place sensor (not shown) is a groove-type photoelectric sensor, the X-axis in-place sensor may be mounted on the X-axis moving block 270, positions of the cross beam 22 near two ends are respectively provided with corresponding trigger points, or positions of the cross beam 22 near two ends are respectively provided with the X-axis in-place sensor (not shown), and the X-axis moving block 270 is provided with corresponding trigger points (not shown).

Referring to fig. 1, 8, 13 and 14, the Z-axis motion module 28 bridges the X-axis motion block 270 and the carriage 3, and includes: a pair of Z-axis adapter plates 280, a Z-axis screw mandrel 285 motor module and a position sensor, wherein one surface of the pair of Z-axis adapter plates 280 is arranged on the carriage 3, one surface of the pair of Z-axis adapter plates, which is far away from the carriage 3, is arranged on the Z-axis sliding blocks 81A and slides along the Z-axis direction along with the Z-axis sliding blocks 81A, the Z-axis screw mandrel 285 motor module comprises a Z-axis servo motor 282, a Z-axis screw mandrel 285 and a Z-axis nut 284 matched with the Z-axis screw mandrel 285, the Z-axis screw mandrel 285 is rotatably arranged on the X-axis moving block 270 along the Z-axis direction through a bearing seat 288 with bearings (not shown) arranged at two ends, the Z-axis nut 284 is arranged on the Z-axis screw mandrel 285 and is connected with the carriage 3, the Z-axis servo motor 282 is arranged on the X-axis moving block 270 through a motor mounting code 282a, the output shaft of the device is connected with the Z-axis screw mandrel 285 through a coupler 287, and is used for driving the Z-axis screw mandrel 285 to rotate, so that the Z-axis nut 284 drives the carriage 3 to move along the Z-axis direction, a Z-axis upper limiting block 283 is arranged on the screw mandrel, a Z-axis lower limiting block 286 is arranged on the Z-axis adapter plate 280 near the bottom of the Z-axis screw mandrel 285, so that the carriage 3 is mechanically limited in the Z-axis direction, a position sensor is arranged on one end face of the carriage 3 facing the glass, and is used for measuring the distance between the carriage 3 and the glass, feeding back distance information to the upper computer 7, and simultaneously, the upper computer 7 performs servo control on the Z-axis servo motor 282, so that the carriage 3 and the glass with different thicknesses always keep a preset printing distance.

In order to realize the motion safety and the control of the return origin of the Z-axis motion module 28 in the Z-axis direction, a Z-axis in-place sensor 289 is further provided on the Z-axis motion module 28, in this embodiment, the Z-axis in-place sensor 289 is a groove-type photoelectric sensor, the Z-in-place sensor may be mounted on the Z-axis adapter plate 280, corresponding trigger points are respectively provided on the X-axis moving block 270 at positions near two ends along the Z-axis direction, or the X-axis moving block 270 is respectively provided with the Z-axis in-place sensor 289 at positions near two ends along the Z-axis direction, and corresponding trigger points (not shown in the drawing) are provided on the Z-axis adapter plate 280.

Referring to fig. 9, 10, 11 and 12, a first organ type folding cover (shown in the drawing) is disposed on a surface of the pair of support beams 2 on which the rack 261 is mounted, the first organ type folding cover (shown in the drawing) extends from two ends of the Y-axis moving block 260 toward two ends of the support beams 2, a second organ type folding cover (shown in the drawing) is disposed on a side surface of the cross beam 22 on which the X-axis linear motor is mounted, the second organ type folding cover (not shown in the drawing) extends from two ends of the X-axis moving block 270 toward two ends of the cross beam 22, and the first organ type folding cover (shown in the drawing) and the second organ type folding cover (shown in the drawing) can be pulled up and compressed along the extending directions thereof, so that dust can be blocked without obstructing the operation of the printing apparatus.

Referring to fig. 1, 9 and 11, since the printing apparatus is a large-sized apparatus, in order to reduce the weight of the printing apparatus, the pair of supporting beams 2 and the cross beam 22 have square beam structures with hollow cross sections, that is, are formed by welding four steel plates, which can improve the mechanical properties of the pair of supporting beams 2 and the cross beam 22, and in order to facilitate the lifting, a pair of lifting

lugs

223 and 241 are provided on the pair of supporting beams 2 and the cross beam 22.

Referring to fig. 15, 16 and 17, the carriage 3 includes a frame, an ink cartridge assembly and a printing nozzle assembly, the ink cartridge assembly is disposed on the frame and is used for loading ink required by the printer and delivering the ink to the printing nozzle assembly, the printing nozzle assembly includes a predetermined number of printing nozzles 316, the printing nozzles are mounted below the frame and are used for executing ink jet operation, and the number of the ink cartridge assemblies and the printing nozzles are determined according to the color type required to be printed by the printer, and this embodiment is illustrated by taking 6 groups of ink cartridge groups and printing nozzles as examples.

Referring to fig. 15, 16 and 17, the ink cartridge assembly includes an ink supply system of 6 ink cartridge units, the ink cartridge units include a main ink cartridge 36, a first ink pump 37, a filter 38, a print head 316, a sub-cartridge group 39, a second ink pump 310, a first negative pressure controller 311, a second negative pressure controller 312 and a pressing ink controller 313, the main ink cartridge 36 is mounted on both sides of the head carriage 3 by cartridge mounting codes 3601, and each group of main ink cartridges 36 is composed of a cartridge nut 3602, an ink tank 3603, a main ink cartridge outlet 3604 and a main ink cartridge inlet 3605. The ink box nut 3602 is mounted on the ink box mounting code 3601, the ink tank 3603 is connected on the ink box nut 3602 through threads, the ink tank 3603 can be removed when ink is filled, each main ink box 36 is connected with a sub ink box group 39, the sub ink box group 39 comprises an ink inlet ink box 3901 and an ink outlet ink box 3902, the ink inlet ink box 3901 comprises an ink inlet ink box 3901a and an ink inlet ink box ink outlet 3901b, the ink outlet ink box 3902 comprises an ink outlet ink box ink inlet 3902a and an ink outlet ink box 3902b, the main ink box ink outlet 3604 is connected with the ink inlet ink box ink inlet 3901a through the first ink pump 37 and the filter 38, the ink inlet ink box ink outlet 3902a is connected with the ink outlet ink box ink inlet 3902a through the printing nozzle 316, and the ink outlet ink box 3902b is connected with the main ink box 5 through the second ink pump 310 to enable ink inlet ink box 36 to flow back; the printing nozzle 316 includes a printing nozzle ink inlet 316a and a printing nozzle ink outlet 316b, the printing nozzle ink inlet 316a is connected with the ink inlet ink box 3901 through a second three-way solenoid valve 318, and the printing nozzle ink outlet 316b is connected with the ink extracting ink box 3902 through a third three-way solenoid valve three-way valve. The ink inlet box 3901 is connected with the first negative pressure controller 311, the ink outlet box 3902 is connected with the second negative pressure controller 312, and negative pressure difference is formed by adjusting the negative pressure of each of the first negative pressure controller 311 and the second negative pressure controller 312, so that circulation of an ink path is realized; the ink inlet box 3901 is further connected to the ink pressing controller 313 to provide positive pressure for the ink inlet box 3901, and the ink pressing action is achieved under the positive pressure, so that when the printing nozzle 316 is not filled with ink, the ink is injected into the printing nozzle 316. The ink in the main ink tank 36 of the ink path circulation system is fed into the ink feed tank 3901 to supplement the ink reduction at the time of ink ejection. Wherein, the first ink pump 37 is used to provide power to make the ink in the main ink box 36 enter the pipeline, the sediment in the ink is filtered by the filter 38 and enters the ink inlet ink box 3901, and the ink in the ink pumping ink box 3902 enters the main ink box 6 through the second ink pump, and the circulation is stably realized by maintaining the negative pressure difference between the ink inlet ink box 3901 and the ink pumping ink box 3902.

The first negative pressure controller 311 and the second negative pressure controller 312 are composed of a pair of air pumps, an air buffer bottle and an air pressure control board, the air pressure control board is provided with a pipe display screen and an operation button, the operation button is used for adjusting the negative pressure values provided by the first negative pressure controller 311 and the second negative pressure controller 312, and the display screen is used for displaying the negative pressure difference. Simultaneously, air pump one end is led to with the atmosphere, and its other end is connected the gas buffer bottle, and this is to the air pump including a positive pressure air pump that is used for providing the malleation and a negative pressure air pump that provides the negative pressure, the user is selected to insert according to the atmospheric pressure demand positive pressure air pump or negative pressure air pump, the atmospheric pressure control board contains a baroceptor, this baroceptor set up in the gas buffer bottle, this baroceptor is used for gathering the atmospheric pressure value in the gas buffer bottle, when atmospheric pressure control board detects in the buffer bottle atmospheric pressure and does not satisfy required atmospheric pressure, and the circular telegram makes its action for the air pump, and the air pump is outwards taken out, is used for controlling the start-stop of air pump is in order to make atmospheric pressure in the gas buffer bottle is invariable to keep the negative pressure value in advance ink horn and the ink drawing ink horn stable.

Referring to fig. 15, 16 and 17, the ink pressing controller 313 and the first negative pressure controller 311 are respectively connected to a common end of a first two-position three-way electromagnetic valve 320, the other end of the first two-position three-way electromagnetic valve 320 is connected to the ink feeding cartridge 3901, and the first two-position three-way electromagnetic valve 320 controls the ink pressing controller 313 or the first negative pressure controller 311 to be cut off, so as to realize a negative pressure circulation or a positive pressure ink pressing function. When the ink pressing operation is performed, the first two-position three-way electromagnetic valve 320 cuts off the negative pressure air path, and introduces the positive pressure air path, so as to realize the function of pressurizing the ink feeding ink box 3901. When the ink path circulates, the first two-position three-way electromagnetic valve 320 connects the negative pressure air path to realize the circulation action of the ink path.

Referring to fig. 18 and 19, the ink inlet ink box 3901 and the ink outlet ink box 3902 have identical structural designs, each of which comprises an ink box cavity 3302a, a stirring assembly, an upper cover mounting seat 3302e and a liquid level detection module, wherein the bottom of the ink box cavity 3302a is mounted on a base plate 3300, an opening end of the ink box cavity 3302a far away from the bottom is hermetically provided with the upper cover mounting seat 3302e through a first sealing ring 3302n, the position of the ink box cavity 3302a near the bottom is provided with an ink inlet and an ink outlet for accessing an ink path circulation system to realize circulation of ink, the stirring assembly of the upper cover mounting seat 3302e comprises a stirring impeller 3302b and a rotating shaft 3302k connected with the stirring impeller 3302b, one end of the rotating shaft 3302k far away from the stirring impeller 3302b is cooperatively mounted on the upper cover mounting seat 3302e through a first bearing 2j, the rotating shaft 3302k is provided with a first clamp spring (not shown) near the upper cover mounting seat 3302e, so as to realize the axial positioning of the rotating shaft 3302k, but not to influence the radial rotation of the rotating shaft 3302k, and a magnetic steel 3303 arranged between the bottom of the ink box cavity 3302a and the base plate 3300, when the magnetic steel 3303 rotates, the stirring impeller 3302b rotates under the magnetic force of the magnetic steel 3303 so as to realize the stirring of ink, the liquid level detection module comprises a liquid level sensor 3302h and a float 3302c, the liquid level sensor 3302h is mounted on the upper cover mounting seat 3302e through a liquid level sensor mounting seat 3302f, a second sealing ring 3302i is arranged at the joint of the liquid level sensor 3302h and is embedded in the rotating shaft 3302k, but not to contact with the inner part of the rotating shaft 3302k, the float 3302c is sleeved on the rotating shaft 3302k, a pair of second clamp springs 3302d are further arranged on the rotating shaft 3302k, the pair of second clamp springs 3302d are located in the ink box cavity 3302a and are arranged up and down, the floater 3302c is arranged between the pair of second clamp springs 3302d and is used for achieving up and down positioning of the floater 3302c, and when the ink box cavity 3302a is full of ink, the floater 3302c can rise along with the liquid level to trigger the liquid level sensor 3302h through magnetic force induction; the two driving mechanisms are disposed on the substrate 3300 and respectively correspond to three sets of sub ink box sets 39, which respectively drive the magnetic steels 3303 to rotate through a synchronous wheel mechanism.

Referring to fig. 18 and 19, the synchronizing wheel mechanism includes: the stirring driving motor 3301, a stirring main synchronizing wheel 3308, six stirring auxiliary synchronizing wheels 3306 and a stirring synchronous belt 3307, wherein the stirring driving motor 3301 is installed on the upper portion of the base plate 3300, an output shaft (not shown) of the stirring driving motor 3301 penetrates through the base plate 3300 and is connected with the stirring main synchronizing wheel 3308 at the bottom of the base plate 3300, the stirring auxiliary synchronizing wheels 3306 are respectively corresponding to the magnetic steels 3303 and are arranged at the bottom of the base plate and are connected with the magnetic steels 3303 through a rotating shaft 3304, a second bearing 3305 is arranged at the matching position of the rotating shaft 3304 and the base plate 3300, the rotation of the second bearing 3305 is ensured to be smoother, the stirring synchronous belt 3307 sequentially bypasses the stirring main synchronizing wheel 3308 and the stirring auxiliary synchronizing wheels 3306, the stirring driving motor 3301 drives the stirring main synchronizing wheel 3308 to rotate, and further drives the stirring auxiliary synchronizing wheels 3306 to rotate, and the magnetic steels 3 connected through the rotating shaft are used for realizing the follow rotation of the stirring synchronous belt 3307 mechanism to simultaneously drive stirring of three groups of ink boxes 39.

In order to ensure that the stirring synchronous belt 3307 is better meshed with the main belt pulley and the six auxiliary belt pulleys to transmit power, synchronous stirring is realized, the stirring synchronous belt 3307 is a double-sided tooth stirring synchronous belt 3307 which comprises an inner side and an outer side opposite to the inner side, four stirring auxiliary synchronous wheels 3306 on the left side and the right side are matched with the inner side of the stirring synchronous belt 3307, two auxiliary synchronous wheels in the middle are matched with the outer side of the stirring synchronous belt 3307, and the stirring main synchronous wheel 3308 is matched with the inner side of the stirring synchronous belt 3307; furthermore, a protective cover 3309 is respectively disposed below the base plate 3300 and corresponding to two driving mechanisms, so as to increase safety protection.

Referring to fig. 17 and 20, the operation steps of the ink cartridge assembly include:

step 1: initializing, pressing ink, pumping the ink from the main ink box 36 to the filter 38 through the first ink pump 37, filtering the ink by the filter 38, supplying the filtered ink into the ink feeding ink box 3901, cutting off the connection with the first negative pressure controller 311 by the first two-position three-way electromagnetic valve 320, accessing the ink pressing controller 313, pressing the ink into and filling the printing nozzle 316, and entering step 2;

step 2: an ink feed, wherein the first ink pump 37 continuously pumps ink from the main ink box 36 to the filter 38, the filter 38 filters the ink and then supplies the filtered ink into the ink feed box 3901, and the step 3 is performed;

step 3: ink is guided, the negative pressure difference between the first negative pressure controller and the second negative pressure controller is maintained, the ink is supplied to a printing spray head 316 by an ink inlet box 3901 for printing, the ink inlet box 3901 is cut off from being connected with an ink pressing controller 313 and is connected with a first negative pressure controller 311, and the ink enters an ink pumping box 3902 through the printing spray head 316 after being printed, and the step 4 is carried out;

step 4: ink is drawn, ink in ink draw cartridge 3902 is forced into main cartridge 36 by second ink pump 310, and step 2 is entered.

In order to further ensure the ink path circulation stability, the following steps are further included between the step 2 and the step 3:

Step 21: judging whether the ink level of the ink feeding ink box 3901 is higher than an ink feeding level according to the collected data of the liquid level sensor 3302h in the ink feeding ink box 3901, executing the step 22 and the step 3 if the ink level is higher than the ink feeding level, and executing the step 3 if the ink level is lower than the ink feeding level;

step 22: the first ink pump 37 stops pumping ink;

the method further comprises the following steps between the step 3 and the step 4:

step 31: and (3) ink extraction judgment, namely judging whether the ink liquid level of the ink extraction ink box 3902 is higher than an ink extraction liquid level according to the collected data of the liquid level sensor 3302h in the ink extraction ink box 3902, executing step 4 if the ink liquid level is higher than the ink extraction liquid level, and executing step 3 if the ink liquid level is lower than the ink extraction liquid level.

Referring to fig. 21, 22 and 23, the ink scraping device 4 is used for maintaining the printing nozzle 316 of the high temperature glass digital ink jet printer, and is disposed below the carriage 3 near one of the supporting beams 21, and comprises a mounting bracket 610, a waste liquid tank 602, a lifting air cylinder 600, a platform support 601 and a scraper assembly, wherein the mounting bracket 610 and the cross beam 22 are connected with the waste liquid tank 602 and are disposed in a mounting groove 610a on the mounting bracket 610, the lifting air cylinder 600 is mounted on the mounting bracket 610, two air flow interfaces of the lifting air cylinder 600 are respectively provided with a first air cylinder throttle valve 600a for adjusting the air flow, a piston rod at the output end of the lifting air cylinder is disposed towards the carriage 3 and is connected with the platform support 601, the platform support 601 is provided with the waste liquid tank 602 for collecting waste liquid, the bottom of the waste liquid tank 602 is concave downwards to form a cone shape, a drain valve 611 is arranged at the lowest position of the bottom of the waste liquid tank 602, the structure design is convenient for collecting and discharging waste liquid in the waste liquid tank 602, the drain valve 611 is connected with a waste liquid inlet 612a of the waste liquid storage tank 612 through a drain hose (not shown) for realizing waste liquid collection in the waste liquid tank 602, the waste liquid storage tank 612 and the waste liquid tank 602 are matched for use, the waste liquid collection capacity can be increased, the manual drain frequency can be reduced, a liquid level sensor (not shown) is arranged in the waste liquid storage tank 612 for detecting whether the waste liquid storage tank 612 achieves the preset storage capacity of waste liquid, when the waste liquid achieves the preset storage capacity, the liquid level sensor (not shown) transmits a signal to the upper computer 7 and simultaneously sends out a signal, the operator needs to treat the waste liquid in time, and the liquid level sensor (not shown) can also monitor the liquid level in the waste liquid storage tank 612 in real time.

In order to ensure the sealability and operability of the drain valve 611, the drain valve 611 is a manual ball valve.

Referring to fig. 21 and 22, the scraper assembly includes a scraping cylinder 608 mounted on the platform support 601, two air inlets of the scraping cylinder 608 are respectively provided with a second air cylinder throttle 608a for adjusting air flow entering the scraping cylinder 608, so as to control scraping speed, a piston rod at an output end of the scraping cylinder 608 is connected with a scraping knife rest 607, the scraping knife rest 607 is slidably mounted on the waste liquid tank 602 through a sliding frame 603, two sides of the sliding frame 603 are respectively provided with a pair of guide rods 609, a linear bearing seat 604 with linear bearings (not shown) is mounted on the corresponding two sides of the bottom of the scraping knife rest 607, and the pair of linear bearing seats 604 are slidably matched with the pair of guide rods 609, so that the scraping knife rest 607 slides on the waste liquid tank 602, and when the scraping device 6 is cleaned and maintained in the later stage, modularization separation is performed, and cleaning efficiency is improved. Twelve doctor blades 605 made of soft materials are arranged on the doctor frame 607 corresponding to the printing spray heads 316, an upper cover plate 606 is further arranged on the doctor frame 607 and used for positioning the doctor blades 605 arranged on the doctor frame 607 to prevent waste liquid from splashing during ink scraping, and plug holes (not shown) are formed in two sides of the upper cover plate 606 of the doctor blades, so that waste liquid can conveniently flow into the waste liquid tank 602 directly for collection.

Referring to fig. 21, 22 and 23, an automated wiping operation is performed: the jacking cylinder 600 drives the platform support frame 601 to slowly ascend to enable the cutting edge of the ink scraping blade 605 to be abutted against the corresponding printing spray nozzle 316, at the moment, the ink scraping cylinder 608 stretches and stretches to drive the scraper frame 607 to slide on the waste liquid tank 602 to enable the ink scraping blade 605 to scrape waste liquid on the printing spray nozzle 316 and store the waste liquid in the waste liquid tank 602, and the jacking cylinder 600 drives the platform support to descend to finish cleaning operation of the printing spray nozzle 316. When the liquid level sensor (not shown) detects that the liquid level in the waste liquid storage tank 612 reaches the preset height, the upper computer 7 controls to send a signal, at this time, an operator judges that the waste liquid in the waste liquid storage tank 612 is full, the operator can close the drain valve 611, the cleaned waste liquid is firstly stored in the waste liquid tank 602, the operator replaces the waste liquid storage tank 612 filled with the waste liquid with the spare waste liquid storage tank 612, then the drain valve 611 is opened, and meanwhile, the cleaning operation is continuously performed, so that the cleaning efficiency is greatly improved.

Referring to fig. 21, 22, 23 and 24, a print head 316 internal cleaning system is further disposed in the carriage 3, the print head 316 internal cleaning system cuts off an ink supply system 637 of the print head 316 through a pair of two-position three-way solenoid valves 633 for cleaning the interior of the print head 316, the inkjet cleaning system further includes a cleaning liquid storage tank 630 containing cleaning liquid, a filter 635, a cleaning pump 631 and a throttle valve 636, a common port (refer to a line trend provided in fig. 6) of the two-position three-way solenoid valves 633 corresponds to an ink inlet 316a and an ink outlet 316b connected to the print head 316, the cleaning liquid sequentially passes through the liquid outlet 630a of the cleaning liquid storage tank 630, the filter 635, the cleaning pump 631 and the two-position three-way solenoid valve 633 connected to the ink inlet 316a of the print head 316 to be introduced into the print head 316, simultaneously, the cleaning liquid is sequentially passed through the ink outlet 316b of the pipeline, the two-position three-way solenoid valve 633 connected to the ink outlet 316b and the throttle valve 636 to be repeatedly cleaned by the cleaning liquid supply system after the cleaning liquid is discharged from the print head 316 to the other part of the print head 316, the cleaning liquid is discharged by the other one-position three-way solenoid valve 633 to the print head 316, the cleaning liquid is repeatedly cleaned by the cleaning liquid supply system, and the waste is discharged from the other part of the print head 316 to the interior of the print head 316, the print head is repeatedly cleaned by the cleaning system through the throttle valve 316, and the cleaning system, the cleaning liquid is discharged by the ink supply system, the ink scraping device 4 is matched at the same time, so that the printing nozzle 316 is better maintained and maintained, and the printing quality is improved.

Referring to fig. 1, 25 and 26, the moisturizing device 5 is disposed on the right side of the printer, near the right supporting beam 21, in a non-working area, and below the carriage 3, for moisturizing the print head 316 on the carriage 3, where the moisturizing device 5 sequentially includes, from bottom to top along the Z-axis: the sewage draining device comprises a moisturizing mounting bracket 500, a moisturizing jacking cylinder 511, a moisturizing liquid storage tank 502, a waste liquid collecting tank 501, a moisturizing waste liquid groove 509 and a moisturizing component, wherein the moisturizing mounting bracket 500 is mounted on a cross beam 22, the moisturizing jacking cylinder 511 is mounted on the moisturizing mounting bracket 500, the output end of the moisturizing jacking cylinder is arranged towards a printing carriage 3, the moisturizing component comprises a moisturizing mounting plate 508 and a preset number of moisturizing heads 507 which are arranged on the moisturizing mounting plate 508 and correspond to printing nozzles 316, the moisturizing mounting plate 508 is detachably mounted in the moisturizing waste liquid groove 509, the bottom of the moisturizing waste liquid groove 509 is mounted at the output end of the moisturizing jacking cylinder 511, the periphery of the waste liquid groove is higher than the moisturizing mounting plate 508, a drain 506 is further arranged at a position of one side of the moisturizing waste liquid groove 509 close to the bottom of the moisturizing waste liquid groove, a drainage groove (not shown in the figure) is further arranged on the moisturizing mounting plate 508, the outlet of the drainage groove (not shown in the figure) and the drain 506 corresponds to the drain 506 on the moisturizing waste liquid groove 509, and the drain 506 is connected to the drain groove 501 through the drain groove to enable the drain groove to be conveniently cleaned, and the drain groove to pass through the drain groove to be connected with the drain groove to the drain groove.

The air source access end of the moisturizing jacking air cylinder 511 is also provided with an air cylinder throttle valve (not shown), and the air cylinder throttle valve (not shown) is used for adjusting the jacking speed of the moisturizing jacking air cylinder 511, so as to ensure slow and smooth action.

Sealing rubber 507a is arranged around the moisturizing heads 507, and when moisturizing operation is performed, the moisturizing heads 507 are contacted with the spray heads to form a sealing environment, and the sealing environment firstly isolates dust in air from polluting moisturizing liquid in the moisturizing heads 507, and secondly, the moisturizing liquid wets an ink-jet part (not shown) of the printing spray heads 316 better, so that a long-time moisturizing effect is achieved.

Referring to fig. 26, when performing a moisturizing operation, the moisturizing jack cylinder 511 slowly jacks the moisturizing mounting plate 508 to realize that the moisturizing heads 507 on the moisturizing mounting plate 508 cooperate with the corresponding printing nozzles 316, each moisturizing head 507 is provided with a liquid inlet (not shown) and a liquid outlet (not shown), the moisturizing liquid storage tank 502 is disposed on the moisturizing mounting bracket 500, a liquid outlet end of the moisturizing liquid storage tank 502 is sequentially connected with a liquid injection pump 505, a one-way valve 504 and a liquid inlet (not shown) of each moisturizing head 507 through pipelines, the liquid injection pump 505 extracts moisturizing liquid in the moisturizing liquid storage tank 502 to be injected into the moisturizing heads 507, and the amount of the moisturizing liquid injected into the moisturizing heads 507 is controlled, the moisturizing liquid in the moisturizing heads 507 can be selectively contacted with the ink-jet parts (not shown) of the printing nozzles 316, so as to realize long-time contact moisturizing or short-time non-contact moisturizing of the printing nozzles 316, for example, short-time non-contact moisturizing is selected when the middle glass is replaced for short time and printing is not performed, long-time contact moisturizing is selected when the middle glass is replaced for long time and printing is not performed by a worker, liquid outlets (not shown) of the moisturizing heads 507 are converged on a common joint 510 through pipelines, the common joint 510 is sequentially connected with an electromagnetic valve 512, an liquid suction pump 503 and the waste liquid collecting tank 501 through pipelines, the waste liquid collecting tank 501 is arranged on the moisturizing mounting bracket 500, and when moisturizing is finished, the moisturizing jacking cylinder 511 drives the moisturizing mounting plate 508 to descend to an initial position, the electromagnetic valve 512 is opened and the liquid pump 503 pumps the waste liquid in the moisturizing heads 507 into the waste liquid collecting tank 501 for collection.

The liquid injection pump 505 and the liquid extraction pump 503 are both direct current pumps, and the liquid injection amount of the liquid injection pump 505 can be further precisely controlled by controlling the working time of the direct current pumps, so as to prevent excessive overflow of the liquid injection in the moisturizing head 507.

The waste liquid collecting tank 501 is provided with a liquid level sensor (not shown) for detecting whether the waste liquid in the waste liquid collecting tank 501 reaches a preset storage amount, when the waste liquid reaches the preset storage amount, the liquid level sensor (not shown) sends out a signal, an operator can timely treat the waste liquid, and real-time monitoring can be realized on the liquid level in the waste liquid storing tank.

In addition, referring to fig. 15, in order to enhance the printing effect, two sides of the carriage 3, which is close to one end of the printing nozzle 316, are respectively provided with a heat gun 370, the heat gun 370 is fixedly mounted on the carriage through a heat gun mounting code, an air outlet of the heat gun 370 is downward, and an inclined plate 371 is disposed below the air outlet, the inclined plate 371 is fixedly mounted on the carriage, and the inclined plate 371 forms a certain angle with the horizontal plane, and is used for dispersing and guiding the hot air blown by the heat gun 370, and rapidly drying the ink sprayed on the glass, so as to prevent the ink from volatilizing and diffusing.

The high-temperature glass digital ink-jet printer provided by the invention can be used for rapidly printing pictures with rich colors, high precision and high durability for glass with various sizes.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the invention, and the scope of the invention should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.

Claims

1. A high-temperature glass digital ink-jet printer is used for printing pictures for glass with various sizes and comprises a bottom frame module for bearing the glass, a triaxial movement module, a carriage and an upper computer, and is characterized in that,

the chassis module comprises a horizontally placed frame, a glass fixing device and a glass conveying device, wherein a printing area is arranged on the frame, the glass fixing device is arranged on the printing area and is used for fixing the glass when a printer prints, and the glass conveying device is arranged on the printing area and is staggered with the glass fixing device and is used for driving the glass to translate;

The three-axis motion module comprises a pair of mutually parallel supporting beams, a cross beam, an X-axis motion module, a pair of Y-axis motion modules and a Z-axis motion module, wherein the pair of mutually parallel supporting beams are longitudinally arranged near two sides of the frame, the cross beam is arranged across the underframe and the pair of supporting beams in a sliding mode, and a coordinate system is defined: the Y-axis motion module is used for driving the cross beam to move along the Y axis, the X-axis motion module is used for driving the character car to move along the X axis, the Z-axis motion module is also arranged between the X-axis motion module and the character car, the Z-axis motion module is used for driving the character car to move along the Z axis on the basis of moving along the X axis, and the three-axis motion realizes the motion of the character car along the X, Y, Z three-axis direction;

the carriage comprises a carriage body, an ink box assembly and a printing nozzle assembly, wherein the ink box assembly is arranged on the carriage body and is used for loading ink required by a printer and conveying the ink to the printing nozzle assembly, the printing nozzle assembly comprises a preset number of printing nozzles, and the printing nozzles are arranged below the carriage body and are used for executing ink jet action;

The upper computer controls the glass fixing device to execute fixing action through a control module, controls the glass conveying device to execute conveying action, controls the X-axis movement module to execute X-axis displacement, controls the Y-axis movement module to execute Y-axis direction displacement, controls the Z-axis movement module to execute Z-axis direction displacement, controls the ink box assembly to execute ink conveying action and controls the printing nozzle assembly to execute ink spraying action; wherein, the liquid crystal display device comprises a liquid crystal display device,

the Y-axis motion module comprises a Y-axis motion block, a Y-axis servo motor, a Y-axis speed reducer, a Y-axis gear, a Y-axis rack meshed with the Y-axis gear and a Y-axis grating ruler, wherein one surface of the Y-axis motion block is connected with the cross beam, the surface of the Y-axis motion block, which is far away from the cross beam, is arranged on the support beam and slides along the Y-axis direction, the output shaft of the Y-axis servo motor is connected with the Y-axis speed reducer, the Y-axis speed reducer is arranged on the Y-axis motion block, the output shaft of the Y-axis speed reducer is arranged towards the support beam and is provided with the Y-axis gear, the Y-axis rack is arranged on the support beam and extends along the Y-axis direction, the Y-axis servo motor drives the Y-axis gear to rotate, the cross beam slides along the support beam through meshed transmission of the Y-axis gear and the Y-axis rack, the Y-axis grating ruler comprises a support beam grating and a Y-axis grating, the Y-axis grating ruler is arranged on the support beam and a Y-axis grating, the Y-axis servo motor is arranged on the support beam and the Y-axis servo motor is matched with the Y-axis grating ruler in the Y-axis direction, and the position of the Y-axis servo motor is controlled by the optical grating ruler in the closed loop, and the position of the Y-axis is matched with the Y-axis grating ruler is arranged on the Y-axis servo motor, and the position of the Y-axis grating scale is controlled; the X-axis motion module comprises an X-axis linear motor, an X-axis motion block and an X-axis grating ruler, the X-axis linear motor comprises an X-axis motor stator and an X-axis motor rotor matched with the X-axis motor stator, the X-axis motor stator is arranged on the cross beam and extends along the X-axis direction, one surface of the X-axis motion block is arranged on the X-axis motor rotor, the other surface of the X-axis motion block is sequentially provided with the Z-axis motion module and a character car, the X-axis linear motor drives the X-axis motion block to drive the character car to move along the X-axis direction, the X-axis grating ruler comprises an X-axis scale grating and an X-axis grating reading head, the X-axis scale grating is arranged on the cross beam, two ends of the X-axis grating reading head extend along the X-axis direction, the X-axis grating reading head is arranged on the X-axis motion block through an X-axis grating mounting code and is matched with the X-axis scale grating, the position information of the character car on the cross beam is measured by utilizing the optical principle of the grating and fed back to the upper computer, and simultaneously the upper computer precisely controls the X-axis motion direction in a closed loop manner;

The Z-axis motion module comprises a Z-axis adapter plate, a Z-axis screw motor group and a Z-axis position sensor, one surface of the Z-axis adapter plate is slidably mounted on the X-axis moving block, the other surface of the Z-axis adapter plate is provided with the carriage, the Z-axis screw motor group comprises a Z-axis servo motor, a Z-axis screw and a Z-axis nut matched with the Z-axis screw, the Z-axis screw is rotatably mounted on the X-axis moving block along the Z-axis direction, the Z-axis nut is mounted on the Z-axis screw and is connected with the carriage, the Z-axis servo motor is mounted on the X-axis moving block, an output shaft of the Z-axis servo motor is connected with the Z-axis screw through a coupler and is used for driving the Z-axis screw to rotate, the Z-axis nut is used for driving the carriage to move along the Z-axis direction, the Z-axis position sensor is mounted on one end surface of the carriage facing the glass and is used for collecting distance information between the carriage and the glass, the distance information is fed back to the upper motor, and the Z-axis servo motor is always controlled to have the same thickness as the glass, and the thickness of the carriage is always kept.

2. The digital ink-jet printer of high-temperature glass according to claim 1, wherein the glass fixing device comprises a plurality of glass fixing units which are uniformly arranged and parallel to each other and a fixing underframe which is fixedly arranged on the rack, the glass fixing units comprise a fence which is horizontally and longitudinally arranged on the fixing underframe, a plurality of universal rollers which are arranged on the fence and have upward wheel faces, a preset number of vacuum chucks and chuck lifting cylinders which are in one-to-one correspondence with the vacuum chucks, the universal rollers are arranged on the upper end face of the fence through screws, the universal rollers are used for bearing the glass, the vacuum chucks are fixedly connected with the chuck lifting cylinders and are arranged on one side of the fence, the chuck lifting cylinders drive the vacuum chucks to lift so that the plane where the vacuum chucks are located is selectively higher than the plane where the universal rollers are located, and after the glass reaches a preset position, the vacuum chucks lift and fix the glass, after printing, the vacuum chucks release the glass and reset through the chuck lifting cylinders.

3. The high-temperature glass digital ink-jet printer according to claim 2, wherein the glass conveying device comprises a conveying underframe, a jacking module, a transmission module and a synchronous belt conveying module, the jacking module comprises a plurality of conveying jacking air cylinders fixedly installed on the frame, the bottom of the conveying underframe is fixedly connected with the conveying jacking air cylinders, the jacking module is driven by the conveying jacking air cylinders to enable the plane selectivity of the glass conveying device to be higher than that of the glass fixing device, the transmission module comprises a transmission motor, a transmission reducer, a horizontally and transversely arranged transmission rod and a pair of bearing blocks, the output shaft of the transmission motor is connected with the transmission reducer, the transmission motor and the reducer are installed on the conveying underframe through threaded connection, the bearing blocks are symmetrically arranged on two sides of the conveying underframe respectively, and the transmission rod penetrates through the transmission reducer and is fixed on the bearing blocks;

the synchronous belt conveying module comprises a plurality of synchronous belt conveying units which are arranged on the conveying underframe and are staggered with the glass fixing units, wherein each synchronous belt conveying unit comprises a horizontally and longitudinally arranged guide rail, a guide rail bracket fixedly arranged on the conveying underframe, a main synchronous belt pulley, a plurality of auxiliary synchronous belt pulleys and a synchronous belt, the guide rail bracket is fixedly arranged on the conveying underframe, the guide rail is fixedly arranged at one end, far away from the conveying underframe, of the guide rail bracket, the main synchronous belt pulley is arranged on the transmission rod and is positioned under the guide rail, the auxiliary synchronous belt pulleys are fixedly arranged on the guide rail, the synchronous belt is sleeved with the main synchronous belt pulley and the auxiliary synchronous belt pulleys, and when the glass conveying device works, the conveying jacking cylinder of the jacking module jacks up the glass conveying device until the glass conveying device is higher than the glass fixing device and jacks up, the transmission motor is started and drives the transmission rod to rotate, and the main synchronous belt pulley follows the transmission rod to rotate and cooperate with the auxiliary synchronous belt pulley to drive the glass conveying device to slide.

4. The high temperature glass digital inkjet printer of claim 1 wherein the cartridge assembly comprises a predetermined number of cartridge units including a main cartridge, a first ink pump, a filter, a secondary cartridge set including an ink inlet and an ink outlet, a filter, a secondary cartridge set including a first negative pressure controller, a second negative pressure controller, and a pressure controller, the ink inlet and the ink outlet, the ink outlet including an ink inlet and an ink outlet, the ink outlet including an ink inlet and an ink outlet, the main cartridge outlet being connected to the ink inlet by the first ink pump, the filter, the ink inlet and the ink outlet being connected to the ink inlet of the ink cartridge by the print head, the ink outlet being connected to the main cartridge by the second ink pump; the ink inlet ink box is connected with the first negative pressure controller, the ink extraction ink box is connected with the second negative pressure controller, and circulation of an ink path is realized by adjusting the pressure difference between two negative pressures of the first negative pressure controller and the second negative pressure controller; the ink inlet ink box is also connected with the ink pressing controller to provide positive pressure for the ink inlet ink box, and the ink pressing action is realized under the action of the positive pressure, so that when the printing nozzle is not filled with ink, the ink is injected into the printing nozzle.

5. The digital ink jet printer of claim 4, further comprising a scraping device, wherein the scraping device comprises a scraping support, a scraping jacking cylinder, a platform support and a scraping plate assembly, the scraping support is connected with the cross beam, the scraping jacking cylinder is installed on the scraping support, a piston rod at an output end of the scraping jacking cylinder faces the carriage and is connected with the platform support, a waste liquid tank for collecting waste liquid is arranged on the platform support, a drain valve is further arranged at the bottom of the waste liquid tank, the scraping plate assembly comprises a scraping cylinder installed on the platform support, a scraping knife rest is connected to the piston rod at the output end of the scraping cylinder, the scraping knife rest is installed on the waste liquid tank in a sliding mode, and a soft preset number of scraping knives are installed on the scraping knife rest corresponding to the printing spray head to execute automatic scraping and cleaning operation: the ink scraping lifting cylinder drives the platform supporting frame to ascend, so that the blade of the ink scraping knife is abutted to the corresponding printing spray head, at the moment, the ink scraping cylinder stretches and stretches to drive the scraper frame to slide on the waste liquid tank, the ink scraping knife scrapes waste liquid on the printing spray head and stores the waste liquid in the waste liquid tank, and the ink scraping lifting cylinder drives the platform to support and descend, so that the cleaning operation of the printing spray head is completed.

6. The digital ink jet printer of claim 5, wherein the cartridge unit further comprises a cartridge cleaning device, a first two-position three-way valve and a second two-position three-way valve, wherein the first two-position three-way valve and the second two-position three-way valve each comprise a first liquid inlet, a second liquid inlet and a liquid outlet, the cartridge cleaning device comprises a cleaning liquid storage tank filled with cleaning liquid, a filter, a cleaning pump and a throttle valve, the first liquid inlet, the second liquid inlet and the liquid outlet of the first two-position three-way valve are respectively connected with the ink inlet cartridge, the cleaning liquid storage tank and the printing nozzle, and the first liquid inlet, the second liquid inlet and the liquid outlet of the second two-position three-way valve are respectively connected with the ink pumping cartridge, the printing nozzle and the waste liquid tank.

7. The high-temperature glass digital ink-jet printer according to claim 4, wherein the ink-feeding ink box and the ink-extracting ink box are consistent in structural design and comprise an ink box cavity, a stirring assembly, an upper cover mounting seat and a liquid level detection module, the bottom of the ink box cavity is mounted on a base plate, an opening end of the ink box cavity, which is far away from the bottom of the ink box cavity, is also hermetically provided with the upper cover mounting seat, the stirring assembly comprises a stirring impeller, a rotating shaft connected with the stirring impeller, and a magnetic steel arranged between the bottom of the ink box cavity and the base plate, one end of the rotating shaft, which is far away from the stirring impeller, is mounted on the upper cover mounting seat through a bearing, when the magnetic steel rotates, the stirring impeller rotates under the magnetic force of the magnetic steel, so as to realize the stirring of ink, the liquid level detection module comprises a liquid level sensor and a float, the liquid level sensor is arranged on the upper cover mounting seat, the float is sleeved on the rotating shaft, and when the quantity of the ink rises, the liquid level sensor reaches a preset height, the liquid level sensor triggers the liquid level sensor, and the liquid level sensor sends out an ink-feeding signal when the ink-extracting ink box starts to enter the ink box.

8. The digital ink jet printer of any one of claims 1 to 7, further comprising a moisturizing device, wherein the moisturizing device is disposed near one of the support beams and is located below the frame, and is configured to moisturize the print heads of the print head assembly, the digital ink jet printer comprises a moisturizing support, a moisturizing cylinder, a liquid waste collection tank, and a moisturizing assembly, the moisturizing support is mounted on the cross beam, the moisturizing cylinder is mounted on the moisturizing support, the moisturizing assembly comprises a moisturizing mounting plate and a predetermined number of moisturizing heads disposed on the moisturizing mounting plate in one-to-one correspondence with the print heads, the moisturizing mounting plate is detachably mounted on the output end of the moisturizing cylinder, when a moisturizing operation is performed, the moisturizing mounting plate is lifted by the moisturizing lifting cylinder to realize the cooperation of the moisturizing heads with the corresponding print heads, each moisturizing head is provided with a moisturizing head and a moisturizing head, the moisturizing head is sequentially connected to the liquid waste collection tank through a liquid suction inlet and a moisturizing head, the moisturizing head is sequentially connected to the liquid waste collection tank by a liquid pump, the moisturizing head is sequentially connected to the liquid waste liquid suction inlet and the liquid pump through the moisturizing head and the liquid collection tank, the moisturizing head is sequentially connected to the moisturizing head and the liquid waste liquid pump, the electromagnetic valve is opened, and the liquid extracting pump is used for extracting the waste liquid in the moisturizing head into the waste liquid collecting tank.

9. The digital ink jet printer of claim 2, further comprising a glass positioning device, wherein the glass positioning device comprises a transverse positioning bar, a longitudinal positioning bar, a first cylinder group matched with the transverse positioning bar and a second cylinder group matched with the longitudinal positioning bar, the second cylinder group is arranged on a first side parallel to the fence of the fixed underframe, the first cylinder group is arranged on a second side adjacent to the first side of the fixed underframe, the longitudinal positioning bar is horizontally and longitudinally arranged and fixedly connected with the second cylinder group, the transverse positioning bar is horizontally and transversely arranged and fixedly connected with the first cylinder group, and the first cylinder group and the second cylinder group drive the transverse positioning bar and the longitudinal positioning bar to lift, so that the glass is positioned at a printing starting position through a transverse stop block arranged on the transverse positioning bar and a longitudinal stop block arranged on the longitudinal positioning bar.