KR101043058B1 - A Cleaning Device of A Head for Ink-Jet Printing Apparatus, and A Head for Ink-Jet Printing Apparatus and An Ink-Jet Printing Apparatus Having the Same - Google Patents

Abstract

The present invention discloses a cleaning apparatus for a head for an inkjet printing apparatus, and an inkjet printing apparatus head and an inkjet printing apparatus having the same.

A cleaning apparatus of a head for an inkjet printing apparatus according to the present invention includes a cleaning liquid storage device for storing a cleaning liquid to be supplied to a plurality of heads; A cleaning liquid supply main conduit and a plurality of cleaning liquid supply branch conduits connecting said plurality of heads and said cleaning liquid storage device; And a plurality of cleaning liquid supply control valves provided between the plurality of cleaning liquid supply branch conduits and the plurality of heads to control the start and end of the cleaning liquid supply.

Inkjet Printing Devices, Heads, Cleaning Devices

Description

A cleaning device of a head for ink-jet printing apparatus, and a head for ink-jet printing apparatus and an ink-jet Printing Apparatus Having the Same}

The present invention relates to a cleaning apparatus for a head for an inkjet printing apparatus, and an inkjet printing apparatus for a head and an inkjet printing apparatus having the same. More specifically, the present invention provides an integrated cleaning apparatus capable of supplying a cleaning liquid to a plurality of inkjet heads used in a conventional inkjet printing apparatus, so that the cleaning can be performed at any time requiring cleaning of the plurality of inkjet heads. A cleaning device for a head for an inkjet printing apparatus, and a head for an inkjet printing apparatus and an inkjet printing apparatus having the same.

Generally, in order to manufacture an electronic circuit component or a flat panel display (FPD) such as a plasma display panel (PDP) or a liquid crystal display panel (LCD), for example, a photoresist (PR) liquid or Electrodes or dots on a glass surface or printed circuit board (PCB) using metal pastes such as copper (Cu), silver (Ag), aluminum (Al), etc. The same pattern must be formed.

As a method for forming the above-described constant pattern, for example, a method of directly patterning a constant pattern by offset printing using two rolls or a constant pattern using a nozzle having an inkjet printer for ejecting ink droplets Direct patterning is used.

1A is a perspective view of an inkjet printing apparatus according to the prior art.

Referring to FIG. 1A, the inkjet printing apparatus 100 according to the related art includes, for example, a plurality of inkjet heads 120 for supplying ink to form a plurality of patterns 114 on a printing object 110; A gantry 130 mounted with the plurality of inkjet heads 120 and movable on the printing object 110; A plurality of inspection devices (140) mounted at the rear of the gantry (130) for inspecting a state of the plurality of patterns (114) formed on the printing object (110); And an ink storage device 150 connected to each of the plurality of inkjet heads 120 to provide ink. Hereinafter, the operation of the inkjet printing apparatus 100 according to the prior art will be described in detail.

Referring back to FIG. 1A, in the inkjet printing apparatus 100, an ink supply main conduit 152 and a plurality of branch conduits 152a, are supplied from the ink storage device 150 to the plurality of inkjet heads 120. Ink is supplied in advance through 152b, 152c, 152d, ..., 152e. The start and end of the ink supply are controlled by the plurality of control valves 156a, 156b, 156c, 156d, ..., 156e. The pressing force of the ink storage device 150 is provided by the pressurized fluid (for example, air) supplied from the ink pressurizing conduit. The supply of pressurized fluid is controlled by pressurized fluid control valve 154. Thereafter, the gantry 130 on which the plurality of inkjet heads 120 are mounted moves on the printing object 110, and supplies ink on the printing object 110 to form a plurality of desired patterns 114. The plurality of patterns 114 are inspected whether the correct patterns are formed by the plurality of inspection devices 140 mounted to the rear of the gantry 130. The plurality of inspection apparatuses 140 may be implemented by, for example, a known optical sensor, a known optical system, a CCD camera, a vision camera, or the like. The printing object 110 is located on the stage 112 for fixing the printing object 110, and the stage 112 is located on the printing apparatus frame 160.

FIG. 1B is a diagram for explaining in detail the thermal ink-jet head and operation used in the inkjet printing apparatus according to the prior art shown in FIG. 1A.

Referring to FIG. 1B, a thermal inkjet head 120 according to the prior art illustrates an inkjet head 120 of any one of the plurality of inkjet heads 120 according to the prior art shown in FIG. 1A. In the thermal inkjet head 120, when an electric power pulse is applied to the heater 122, the ink in the chamber 124 receives heat and expands instantaneously to form a droplet form through the nozzle 126 ( 128). Therefore, when the plurality of inkjet heads 120 shown in FIG. 1A are the thermal inkjet heads 120 shown in FIG. 1B, respectively, the ink droplets 128 are nozzles for the instantaneous heating of the heater 122 as described above. Sprayed through 126, a plurality of desired patterns 114 are formed.

FIG. 1C is a view for explaining in detail a piezo ink-jet head used in the inkjet printing apparatus according to the prior art shown in FIG. 1A and its operation.

Referring to FIG. 1C, a piezo inkjet head 120 according to the prior art illustrates an inkjet head 120 of any one of the plurality of inkjet heads 120 according to the prior art shown in FIG. 1A. In the piezo inkjet head 120, the piezoelectric element 121 is attached to the piezoelectric element 121 attached to the head 120 by a piezoelectric driver 123. The applied strain vibrates the meniscus 124 in the head 120 such that ink forms droplets from the nozzle 126 of the head 120 and is ejected. In this case, since the ejection time of the ink droplets is determined according to the data provided by the piezoelectric drive device 123, desired data pulse trains can be obtained. As can be seen in the embodiment shown in FIG. 1C, the data pulse train of the ink droplets ejected from the nozzle 126 of the piezo inkjet head 120 was discharged with the same time span, although the first three ink droplets were ejected with the same time span. It can be seen that the third ink droplet was ejected with a time delay slightly different from the third ink droplet. Therefore, when the plurality of inkjet heads 120 shown in FIG. 1A are the piezo inkjet heads 120 shown in FIG. 1C, respectively, the ink may be formed by using the piezoelectric element 121 and the piezoelectric drive device 123 as described above. By ejecting the droplets at a desired time point, a plurality of desired patterns 114 are formed.

In the inkjet printing apparatus 100 according to the related art described above, inks used for the plurality of inkjet heads 120 are typically various types of photoresist (PR) liquids or metal pastes (hereinafter, collectively referred to as "inks"). Ink ". In addition, the nozzle 126 of the inkjet head 120 has a narrow size of approximately several to several tens of micrometers (for example, 20 micrometers). Therefore, when the ink is continuously supplied and used in the inkjet head 120 or when used intermittently due to the down time, the solvent contained in the ink is volatilized and the ink solidifies at the exit of the nozzle 126. solidify or cure to deform the size of the nozzle 126. In this case, a problem arises that it is difficult to form ink droplets 128 of uniform size from the nozzle 126 or to maintain a constant viscosity. In particular, in the plurality of inkjet heads 120, when the use of the ink is resumed after the use of the ink is stopped, the ink is completely solidified or cured so that the nozzle 126 is completely clogged so that the ink cannot be discharged.

In order to solve the problem caused when the nozzle 126 described above is clogged or the size is deformed, cleaning (cleaning) of the inkjet head 120 and the nozzle 126 is required.

In the prior art, the following two cleaning methods are used to clean the inkjet head 120 and the nozzle 126 shown in Figs. 1A to 1C.

In the first cleaning method, the plurality of inkjet heads 120 must first be separated from the gantry 130. Thereafter, residual ink in each of the separated inkjet heads 120 must be removed. In addition, the nozzle 126 of the inkjet head 120 should be cleaned mechanically using, for example, ultrasonic waves, or manually by a user. Thereafter, the cleaned plurality of inkjet heads 120 must be mounted on the gantry 130 again.

In the second cleaning method, the existing plurality of branch conduits 152a, 152b, 152c, 152d, ..., 152e connected to the plurality of inkjet heads 120 are removed, and the cleaning liquid is applied to the plurality of inkjet heads 120. A plurality of conduits supplying the Thereafter, the cleaning liquid is supplied to the plurality of inkjet heads 120 to continuously discharge the remaining ink in the plurality of inkjet heads 120. Thereafter, the existing plurality of branch conduits 152a, 152b, 152c, 152d, ..., 152e must be connected to the cleaned plurality of inkjet heads 120.

In addition, in the above two cleaning methods, after the cleaning is completed, the operation of checking the droplet size of the ink is performed through dummy ejection. This droplet size confirmation is performed by a separate confirmation device (not shown) consisting of a high speed and high resolution camera and software capable of determining the droplet size.

As described above, the inkjet head 120 used in the inkjet printing apparatus 100 according to the prior art has the following problems.

1. For example, cleaning such as automatic cleaning or the like is required before the inkjet head 120 is automatically cleaned after a certain time of use or before the inkjet head 120 is stopped and reused for a long time. After this cleaning is completed, a check operation of the above-mentioned droplet size of ink is essentially required. If the result of confirming the droplet size of the ink is found to be insufficient cleaning, the cleaning should be executed again. To this end, any one of the two cleaning methods described above must be used again, which not only takes considerable cleaning time, but also the cleaning operation is quite complicated and cumbersome.

2. In the case of using the first cleaning method, in addition to the cleaning time, additional time is required for detaching the inkjet head 120 from the gantry 130 and remounting the gantry 130.

3. Since the cleaning of the inkjet head 120 is performed by a mechanical method or a manual method, the possibility of failure of the inkjet head 120 during cleaning is high.

4. Increased cleaning time lengthens the manufacturing process time of the pattern.

Therefore, a new method for cleaning inkjet head 120 and nozzle 126 quickly and safely is desired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, by using a cleaning apparatus capable of supplying a cleaning liquid to a plurality of inkjet heads used in a conventional inkjet printing apparatus, which requires cleaning of a plurality of inkjet heads. The present invention provides a cleaning device for a head for an inkjet printing device which enables cleaning at a rapid time, and an inkjet printing device head and an inkjet printing device having the same.

According to a first aspect of the present invention, a cleaning apparatus for cleaning a plurality of heads for an inkjet printing apparatus, the cleaning apparatus comprising: a cleaning liquid storage device for storing cleaning liquids to be supplied to the plurality of heads; A cleaning liquid supply main conduit and a plurality of cleaning liquid supply branch conduits connecting said plurality of heads and said cleaning liquid storage device; And a plurality of cleaning liquid supply control valves provided between the plurality of cleaning liquid supply branch conduits and the plurality of heads to control the start and end of the cleaning liquid supply.

According to a second aspect of the present invention, in a head for an inkjet printing apparatus, a plurality of heads are provided in the inkjet printing apparatus, and the plurality of heads are respectively connected to the plurality of heads, and may be provided to the plurality of heads. An ink storage device for storing ink; A cleaning liquid storage device connected to the plurality of heads, respectively, and storing a cleaning liquid to be provided to the plurality of heads; And a plurality of switching devices for controlling only one of the ink and the cleaning liquid to be supplied to the plurality of heads.

According to a third aspect of the present invention, an inkjet printing apparatus comprising: a plurality of heads for supplying ink to form a plurality of patterns on a printing object; A gantry mounted with the plurality of heads and movable on the printing object; A plurality of inspection apparatuses mounted to the rear of the gantry and configured to inspect a state of a plurality of patterns formed on the printing object; An ink storage device respectively connected to the plurality of heads, the ink storage device storing ink to be provided to the plurality of heads; A cleaning liquid storage device connected to the plurality of heads, respectively, and storing a cleaning liquid to be provided to the plurality of heads; And a plurality of switching devices for controlling only one of the ink and the cleaning liquid to be supplied to the plurality of heads.

In the present invention, the following effects are achieved.

1. The cleaning time is greatly reduced by cleaning the inkjet head and nozzle, and the cleaning operation is simple and simple.

2. Since the inkjet head does not need to be detached from the gantry and reattached to the gantry, cleaning can be done easily, and no additional time is required for the detachment of the inkjet head.

3. The possibility of failure during cleaning of the inkjet head is considerably reduced or substantially free of failure.

4. Since the cleaning time is significantly reduced, the manufacturing time of the pattern is also significantly reduced.

Further advantages of the present invention can be clearly understood from the following description with reference to the accompanying drawings, in which like or similar reference numerals denote like elements.

Hereinafter, the present invention will be described with reference to embodiments and drawings of the present invention.

2A is a view showing a perspective view of the inkjet printing apparatus according to the present invention.

Referring to FIG. 2A, referring to FIG. 1A, the inkjet printing apparatus 200 according to the present invention includes a plurality of inkjet heads 220 for supplying ink to form a plurality of patterns 214 on the printing object 210. ); A gantry 230 mounted with the plurality of inkjet heads 220 and movable on the printing object 210; A plurality of inspection devices 240 mounted on the rear of the gantry 230 and configured to inspect a state of a plurality of patterns 214 formed on the printing object 210; An ink storage device 250 connected to each of the plurality of inkjet heads 220 and storing ink to be provided to the plurality of inkjet heads 220; A cleaning liquid storage device (270) connected to the plurality of ink jet heads (220), respectively, for storing cleaning liquids to be provided to the plurality of ink jet heads (220); And a plurality of switching devices 278a, 278b, 278c, 278d, ..., 278e for controlling only one of the ink and the cleaning liquid to be supplied to the plurality of inkjet heads 220. Hereinafter, the operation of the inkjet printing apparatus 200 according to the present invention will be described in detail.

Referring again to FIG. 2A, in the inkjet printing apparatus 200 according to the present invention, the ink supply main conduit 252 and the ink supply main conduit 252 from the ink storage device 250 to the plurality of inkjet heads 220. Ink is supplied in advance through a plurality of branched ink supply branch conduits 252a, 252b, 252c, 252d, ..., 252e. The start and end of the ink supply are controlled by the plurality of ink supply control valves 256a, 256b, 256c, 256d, ..., 256e. The pressing force of the ink storage device 250 is provided by the pressurized fluid (for example, air) supplied from the ink pressurizing conduit. The supply of pressurized fluid is controlled by the ink pressurized fluid control valve 254. Thereafter, the gantry 230 equipped with the plurality of inkjet heads 220 moves on the printing object 210, and supplies ink onto the printing object 210 to form a plurality of desired patterns 214. The plurality of patterns 214 are inspected whether or not the correct patterns are formed by the plurality of inspection devices 240 mounted behind the gantry 230. The plurality of inspection apparatuses 240 may be implemented by, for example, a known optical sensor, a known optical system, a CCD camera, a vision camera, or the like. The printing object 210 is located on the stage 212 for fixing the printing object 210, and the stage 212 is located on the printing apparatus frame 260.

On the other hand, the plurality of inkjet heads 220 may have a predetermined time at which ink may be solidified during use (for example, when ink needs to be added to the ink storage device 250, the inkjet heads 220 may be constant). In the case of stopping for a long time, cleaning may be required in the case of being contaminated by using the inkjet head 220 for a long period of time and depending on the type of solvent, in particular, when the ink is easily solidified or solidified on the nozzle or the ink supply conduit. In this case, the gantry 230 is moved to a cleaning zone 216 provided on one side of the printing apparatus frame 260. Thereafter, the plurality of switching devices 278a, 278b, 278c, 278d,..., 278e are used by the plurality of inkjet heads 220. It is switched to block the fluid communication state with 252e and to be in fluid communication with the plurality of cleaning liquid supply branch conduits 272a, 272b, 272c, 272d, ..., 272e. The switching operation of the plurality of switching devices 278a, 278b, 278c, 278d, ..., 278e can be controlled by an automatic electrical control device (not shown) provided separately. Thereafter, the plurality of cleaning liquid supply branch conduits 272a branched from the cleaning liquid supply main conduit 272 and the cleaning liquid supply main conduit 272 to the plurality of inkjet heads 220 from the cleaning liquid storage device 270. Cleaning liquids are supplied via 272b, 272c, 272d, ..., 272e). The start and end of the cleaning liquid supply are controlled by the plurality of cleaning liquid supply control valves 276a, 276b, 276c, 276d, ..., 276e. The pressing force of the cleaning liquid storage device 270 is provided by the pressurized fluid (eg, air) supplied from the cleaning liquid pressurizing conduit. The supply of pressurized fluid is controlled by the cleaning liquid pressurized fluid control valve 274.

FIG. 2B is a view for explaining a cleaning operation of a thermal ink-jet head used in the inkjet printing apparatus according to the present invention shown in FIG. 2A in detail.

2A and 2B, a thermal inkjet head 220 according to the present invention illustrates an inkjet head 220 of any one of the plurality of inkjet heads 220 according to the present invention shown in FIG. 2A. . For cleaning the thermal inkjet head 220, the switching device 278 is switched to supply a cleaning liquid. The cleaning liquid then passes through the channel 227 in the manifold 225 of the thermal inkjet head 220, for example through the cleaning liquid supply main conduit 272 and the cleaning liquid supply branch conduit 272a. ) Is injected. The injected cleaning liquid discharges ink remaining in the channel 227 and the chamber 224 through the nozzle 226. When the cleaning of the thermal inkjet head 220 is finished in this manner, the switching device 278 is switched to supply ink. Thereafter, as described above with reference to FIG. 2A, ink is supplied from the ink storage device 250 back into the plurality of thermal inkjet heads 220, and the inkjet printing apparatus 200 according to the present invention is provided with a plurality of patterns ( 214 may be formed.

FIG. 2C is a view for explaining a cleaning operation of a piezo ink-jet head used in the inkjet printing apparatus according to the present invention shown in FIG. 2A in detail.

2A and 2C, the piezo inkjet head 220 according to the present invention illustrates any one inkjet head 220 of the plurality of inkjet heads 120 according to the present invention shown in FIG. 2A. . For cleaning the piezo inkjet head 220, the switching device 278 is switched to supply a cleaning liquid. Thereafter, the cleaning liquid is injected into the meniscus 224 of the piezo inkjet head 220 via, for example, the cleaning liquid supply main conduit 272 and the cleaning liquid supply branch conduit 272a. The injected cleaning liquid discharges ink remaining in the meniscus 224 through the nozzle 226. When the cleaning of the piezo inkjet head 220 is finished in this manner, the switching device 278 is switched to supply ink. Thereafter, as described above with reference to FIG. 2A, ink is supplied back from the ink storage device 250 into the plurality of piezo inkjet heads 220, and the inkjet printing apparatus 200 according to the present invention is provided with a plurality of patterns ( 214 may be formed.

In the present invention described above, the overall operations of the inkjet printing apparatus 200 including the ink supply operation, the cleaning liquid supply operation, the switching device switching operation, and the like are carried out in one central controller (for example, a microprocessor or the like). Can be controlled according to a predetermined program. In addition, in order to supply the ink and the cleaning liquid to those skilled in the art, an actuator (not shown) having a forced liquid supply function such as a pump that can control the pressing force and the supply amount required for supplying the ink and the cleaning liquid should be used. You will understand enough.

The cleaning apparatus of the head for an inkjet printing apparatus of the present invention described above, and the head and inkjet printing apparatus for an inkjet printing apparatus having the same, provide a plurality of patterns required for the manufacture of a circuit of an electronic component or an FPD such as a PDP or LCD. It is exemplarily described as being used in an inkjet printing apparatus and a head for an inkjet printing apparatus used for forming. However, one of ordinary skill in the art can fully understand that the present invention can be applied to the head and printing apparatus for printing apparatus used to form a plurality of patterns used in the technical fields other than the head for inkjet printing apparatus for manufacturing FPD and the inkjet printing apparatus. will be.

Various modifications may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims. It is not. Accordingly, the scope of the present invention should not be limited by the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.

1A is a view showing a perspective view of an inkjet printing apparatus according to the prior art.

FIG. 1B is a view for explaining in detail a thermal ink-jet head and an operation used in the inkjet printing apparatus according to the prior art shown in FIG.

FIG. 1C is a view for explaining in detail a piezo ink-jet head used in the inkjet printing apparatus according to the prior art shown in FIG. 1A and its operation.

2A is a view showing a perspective view of the inkjet printing apparatus according to the present invention.

FIG. 2B is a view for explaining a cleaning operation of a thermal ink-jet head used in the inkjet printing apparatus according to the present invention shown in FIG. 2A in detail.

FIG. 2C is a view for explaining a cleaning operation of a piezo ink-jet head used in the inkjet printing apparatus according to the present invention shown in FIG. 2A in detail.

Claims (21)

In the cleaning apparatus for cleaning the plurality of heads 220 for the inkjet printing apparatus 200, A cleaning liquid storage device (270) for storing cleaning liquids to be supplied to the plurality of heads (220); A cleaning liquid supply main conduit 272 connected to the cleaning liquid storage device 250; A plurality of cleaning solution supply branch conduits 272a, 272b, 272c, 272d, ..., 272e branched from the cleaning solution supply main conduit 272 and connected to the plurality of heads 220; And A plurality of cleanings provided between the plurality of cleaning liquid supply branch conduits 272a, 272b, 272c, 272d, ..., 272e and the plurality of heads 220 to control the start and end of the cleaning liquid supply Liquid Supply Control Valves (276a, 276b, 276c, 276d, ..., 276e) Head cleaning device comprising a. The method of claim 1, The cleaning liquid storage device 250 is provided with pressing force by a pressurized fluid supplied from the cleaning liquid pressurizing conduit, The supply of pressurized fluid is controlled by a cleaning liquid pressurized fluid control valve 274. Head cleaning device. The method according to claim 1 or 2, And the plurality of heads (220) are thermal inkjet heads or piezo inkjet heads, respectively. The method according to claim 1 or 2, A head cleaning device, wherein the ink is a photoresist liquid or a metal paste. The method of claim 3, A head cleaning device, wherein the ink is a photoresist liquid or a metal paste. In the head for the inkjet printing apparatus 200, The inkjet printing apparatus 200 is provided with a plurality of heads 220, The plurality of heads 220 An ink storage device 250 connected to the plurality of heads 220 and storing ink to be provided to the plurality of heads 220; A cleaning liquid storage device (270) connected to each of the plurality of heads (220) and storing cleaning liquids to be provided to the plurality of heads (220); And A plurality of switching devices (278a, 278b, 278c, 278d, respectively) connected to the plurality of heads (220) for controlling only one of the ink and the cleaning liquid to be supplied to the plurality of heads (220). ., 278e) Head for an inkjet printing device comprising a. The method of claim 6, The head for the inkjet printing device 200 An ink supply main conduit 252 and a plurality of ink supply branch conduits 252a, 252b, 252c, 252d, ..., 252e connecting the plurality of heads 220 and the ink storage device 250; A plurality of ink supplies provided between the plurality of ink supply branch conduits 252a, 252b, 252c, 252d, ..., 252e and the plurality of heads 220 to control the start and end of the ink supply. Control valves 256a, 256b, 256c, 256d, ..., 256e; A cleaning liquid supply main conduit 272 and a plurality of cleaning liquid supply branch conduits 272a, 272b, 272c, 272d, ..., 272e connecting the plurality of heads 200 and the cleaning liquid storage device 270 ; And A plurality of cleaning liquid supply branch conduits 272a, 272b, 272c, 272d,... 272e and a plurality of heads 200, for controlling the start and end of the cleaning liquid supply; Cleaning Fluid Supply Control Valves (276a, 276b, 276c, 276d, ..., 276e) Including, The plurality of switching devices 278a, 278b, 278c, 278d,..., 278e supplies the plurality of ink supply branch conduits 252a, 252b, 252c, 252d,..., 252e and the plurality of cleaning liquids. Where the branch conduits 272a, 272b, 272c, 272d, ..., 272e meet Head for inkjet printing device. The method according to claim 6 or 7, The ink storage device 250 is pressurized by an ink pressurized fluid supplied from an ink pressurizing conduit, the supply of the ink pressurized fluid is controlled by an ink pressurized fluid control valve 254, The cleaning liquid storage device 270 is provided with a pressing force by the cleaning liquid pressurized fluid supplied from the cleaning liquid pressurizing conduit, and the supply of the cleaning liquid pressurized fluid is controlled by the cleaning liquid pressurized fluid control valve 274.  Head for inkjet printing device. The method according to claim 6 or 7, Wherein the plurality of heads (220) are thermal inkjet heads or piezo inkjet heads, respectively. The method of claim 8, Wherein the plurality of heads (220) are thermal inkjet heads or piezo inkjet heads, respectively. The method according to claim 6 or 7, A head for an ink jet printing apparatus, wherein the ink is a photoresist liquid or a metal paste. The method of claim 8, A head for an ink jet printing apparatus, wherein the ink is a photoresist liquid or a metal paste. In the inkjet printing apparatus 200, A plurality of heads 220 for supplying ink to form a plurality of patterns 214 on the printing object 210; A gantry 230 mounted with the plurality of heads 220 and movable on the printing object 210; A plurality of inspection devices 240 mounted to the rear of the gantry 230 and configured to inspect a state of the plurality of patterns 214 formed on the printing object 210; An ink storage device 250 connected to the plurality of heads 220 and storing ink to be provided to the plurality of heads 220; A cleaning liquid storage device (270) connected to each of the plurality of heads (220) and storing cleaning liquids to be provided to the plurality of heads (220); And A plurality of switching devices (278a, 278b, 278c, 278d, respectively) connected to the plurality of heads (220) for controlling only one of the ink and the cleaning liquid to be supplied to the plurality of heads (220). ., 278e) Inkjet printing apparatus comprising a. The method of claim 13, The plurality of heads 220 An ink supply main conduit 252 and a plurality of ink supply branch conduits 252a, 252b, 252c, 252d, ..., 252e connecting the plurality of heads 220 and the ink storage device 250; A plurality of ink supplies provided between the plurality of ink supply branch conduits 252a, 252b, 252c, 252d, ..., 252e and the plurality of heads 220 to control the start and end of the ink supply. Control valves 256a, 256b, 256c, 256d, ..., 256e; A cleaning liquid supply main 272 conduit connecting the plurality of heads 220 and the cleaning liquid storage device 270 and a plurality of cleaning liquid supply branch conduits 272a, 272b, 272c, 272d, ..., 272e ; And A plurality of cleaning liquid supply branch conduits 272a, 272b, 272c, 272d,... 272e and the plurality of heads 220, for controlling the start and end of the cleaning liquid supply. Cleaning Fluid Supply Control Valves (276a, 276b, 276c, 276d, ..., 276e) Including, The plurality of switching devices 278a, 278b, 278c, 278d,..., 278e supplies the plurality of ink supply branch conduits 252a, 252b, 252c, 252d,. Where the branch conduits 272a, 272b, 272c, 272d, ..., 272e meet Inkjet printing device. The method according to claim 13 or 14, The ink storage device 250 is pressurized by an ink pressurized fluid supplied from an ink pressurizing conduit, the supply of the ink pressurized fluid is controlled by an ink pressurized fluid control valve 254, The cleaning liquid storage device 270 is provided with a pressing force by the cleaning liquid pressurized fluid supplied from the cleaning liquid pressurizing conduit, and the supply of the cleaning liquid pressurized fluid is controlled by the cleaning liquid pressurized fluid control valve 274. Inkjet printing device. The method according to claim 13 or 14, Inkjet printing apparatus of the plurality of heads 220 is a thermal inkjet head or a piezo inkjet head, respectively. The method of claim 15, Inkjet printing apparatus of the plurality of heads 220 is a thermal inkjet head or a piezo inkjet head, respectively. The method according to claim 13 or 14, An ink jet printing apparatus, wherein the ink is a photoresist liquid or a metal paste. The method of claim 15, An ink jet printing apparatus, wherein the ink is a photoresist liquid or a metal paste. The method according to claim 13 or 14, The plurality of inspection apparatus 240 is an inkjet printing apparatus implemented by any one of a known optical sensor, a known optical system, a CCD camera, and a vision camera. The method of claim 15, The plurality of inspection apparatus 240 is an inkjet printing apparatus implemented by any one of a known optical sensor, a known optical system, a CCD camera, and a vision camera.

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