WO2017078433A1 - Coated steel sheet manufacturing apparatus using inkjet printing - Google Patents

Coated steel sheet manufacturing apparatus using inkjet printing Download PDF

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Publication number
WO2017078433A1
WO2017078433A1 PCT/KR2016/012602 KR2016012602W WO2017078433A1 WO 2017078433 A1 WO2017078433 A1 WO 2017078433A1 KR 2016012602 W KR2016012602 W KR 2016012602W WO 2017078433 A1 WO2017078433 A1 WO 2017078433A1
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WO
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Patent type
Prior art keywords
steel sheet
ink
apparatus
head
printing
Prior art date
Application number
PCT/KR2016/012602
Other languages
French (fr)
Korean (ko)
Inventor
김경석
이소연
유석진
홍완기
원성연
Original Assignee
주식회사 포스코
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01Ink jet
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers, thermal printers, for supporting or handling copy material in sheet or web form
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J15/00Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers, thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/04Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00Typewriters or selective printing or marking mechanisms, e.g. ink-jet printers, thermal printers characterised by the purpose for which they are constructed
    • B41J3/407Typewriters or selective printing or marking mechanisms, e.g. ink-jet printers, thermal printers characterised by the purpose for which they are constructed for marking on special material
    • B41J3/413Typewriters or selective printing or marking mechanisms, e.g. ink-jet printers, thermal printers characterised by the purpose for which they are constructed for marking on special material for metal
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00Typewriters or selective printing or marking mechanisms, e.g. ink-jet printers, thermal printers characterised by the purpose for which they are constructed
    • B41J3/54Typewriters or selective printing or marking mechanisms, e.g. ink-jet printers, thermal printers characterised by the purpose for which they are constructed with two or more sets of type or printing elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00Inking and printing with a printer's forme
    • B41M1/26Printing on other surfaces than ordinary paper
    • B41M1/28Printing on other surfaces than ordinary paper on metals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock

Abstract

A coated steel sheet manufacturing apparatus using inkjet printing is disclosed. The coated steel sheet manufacturing apparatus, according to one embodiment of the present invention, comprises a printing device for printing on a surface of a steel sheet by using inkjet printing, wherein the printing device comprises: a plurality of ink heads arranged in the progressing direction of the steel sheet at a printing area; and a plurality of curing devices arranged at the rear of each ink head (the progressing direction of the steel sheet) so as to cure ink droplets dropped on the steel sheet.

Description

Apparatus for manufacturing a coated steel sheet using an ink jet printing

The present invention relates to a device for manufacturing a coated steel sheet, more particularly, to a device for manufacturing a coated steel sheet using an ink-jet printing.

Steel sheet with a pattern printed on the surface can be divided into printing plates by printing using a silk-screen printing using a steel sheet, the steel sheet roll printer, and pattern transfer paper. Screen printing plates are used for the printing process on the sheet (sheet) instead of the coil by the process of intermittent arrangement type (batch type) and roll printing plate is a method of coating buried in the ink or paint in which the print pattern etched roll used, and pattern transfer paper printing plate is used in a method of transferring the transfer sheet the pattern engraved on the plates.

However, such a conventional technology, such may have a problem.

In the case of silk-screen production process is relatively simple, but depending on the type of design or product must be manufactured to print the screen separately to be printed, and a disadvantage, depending on the number or kinds of color increasing number of screens, ultimately working speed productivity is weak slow.

In the case of a roll printing method yiraseo continuous coil coating process, unlike the silk-screen it is high, but productivity, print pattern is simple and difficult diversification difficult in a variety of product design implementation design. In addition, there is increasing like the silk-screen with a number of colors in accordance with the capital of the printing roll, and the production efficiency falls, due to the complexity of the production process disadvantage.

Embodiments of the present invention to provide an apparatus for manufacturing a coated steel sheet that can improve the productivity and output quality by an ink-jet printing.

In the print area and to provide an apparatus for producing coated steel sheets which can ensure a uniform flow field in the direction of the steel sheet is in progress to accurately position the ink droplets land on the target.

According to an aspect of the invention, a printing apparatus for printing by an ink-jet printing on the surface of the steel sheet, wherein the printing apparatus includes: a plurality of print heads in the printing area is arranged in the traveling direction of the steel strip, each of said is disposed in the rear (the direction of movement of the steel plate) of the print head may be provided apparatus for manufacturing a coated steel sheet including a plurality of curing devices for curing the enemy away from the ink liquid to the steel sheet.

In addition, the printing apparatus is formed with a second opening for, but bound to the plurality of print head and wherein the plurality of the curing apparatus as a unit, exposure to irradiation section of the first aperture and the curing device for exposing the nozzle of the ink head which may further include a base frame.

Further, the base frame can be prevented from being provided to extend in the front, back, and sides of the both sides of the print head, the unevenness yudongil around the ink head.

Further, the printing apparatus may further comprise a dummy print head disposed in front of the ink head positioned in the forward (going in the opposite direction of the steel plate) of the plurality of ink heads.

And, the method may further include curing the dummy device is disposed between the ink head positioned above the front and the dummy print head.

In addition, it disposed to the to the plurality of print heads are each constant of the plurality of curing devices interval, the dummy ink head has a front of the ink head positioned at the most forward at the same interval as the interval between the plurality of print heads on may be disposed.

In addition, the contact transfer unit under the printing area of ​​the printing apparatus further comprises a contact transfer unit for supporting the steel sheet is, but not to the steel sheet, may comprise a supporting member which includes a convex curved surface upward.

In addition, the expansion chamber in the support is shaped deformation is arranged to be positioned under the conveyor belt, which turning to the endless track, the region in which the conveyor belt supporting the steel plates, to provide the air pressure through the holes or slits to include, and are by the air pressure supplied from the expansion chamber to the conveyor belt to maintain the curved surface.

Further, the steel sheet may be provided so as to have a curvature, such as the curved surface of the conveyor belt in close contact with the conveyor belt.

In addition, the distance between each of the ink head and the steel sheet may be equally arranged.

In addition, the distance between each of the ink head and the steel sheet can be maintained in a range of 0.8 mm to 1.2 mm.

In addition, but constraining the plurality of print heads as a unit, further comprising a base frame to which the first opening for exposing the nozzle of the ink head is formed, the base frame has a front (wherein the steel sheet approaches the print head direction) and there may be provided apparatus for manufacturing a coated steel sheet extending on both sides of.

Further, the base frame may further include a coupling plate which is formed with a third opening for receiving the print head, fixing the print head in the third opening.

Further, the base frame can be prevented from being provided to extend in the front, back, and sides of the both sides of the print head, the unevenness yudongil around the ink head.

In addition, the print head has a plurality doedoe dog arranged in parallel in the width direction of the steel sheet, may be arranged such that some overlap in the longitudinal direction of the steel sheet.

In addition, of the ink head to be arranged to be the overlap may further include a first auxiliary plate which is installed so as to fill a space between the print head and the print head which is located in the rear position to the front.

Further, the engaging plate may further include a second auxiliary plate is provided so as to be disposed is concave from the base frame, fill the space between the print head and the base frame.

Further, the back fill a space between the print head and the base frame may further include an auxiliary plate which is installed does not protrude more than the print head.

Further, the ink head to the position in front of the plurality of ink heads may be off for at least developed flow distance (L1) placed from the front end of the base frame.

In addition, the print head may be provided so as to project below the said base frame and the base frame extends at least developed flow distance (L2) in front of the ink head.

In addition, the print head is adapted to be depressed up than the base frame, the base frame may be extended at least developed flow distance (L3) in the forward direction of the print head.

In addition, the distance between each of the ink head and the steel sheet can be maintained in a range of 0.8 mm to 1.2 mm.

According to another aspect of the invention, a printing apparatus for printing by an ink-jet printing on the surface of the steel sheet, and the printing apparatus, on the printing area is arranged in the traveling direction of the steel strip, it is arranged in the width direction of the steel strip but bind the plurality of print heads are arranged in a plurality of the width direction of the print head heat, the steel plate including a plurality of print heads as a unit, a base frame to which the first opening for exposing parts of the nozzles of the ink head to form and wherein the base frame extend in the front side (direction in which the steel sheet access) and on both sides of the print head, and projecting down from the nozzle portion end of the print head, is provided at an end of the ink head, It may provide an apparatus for manufacturing a coated steel sheet that includes a first auxiliary plate so as to fill the space around the nozzle unit.

And, the method may further include a second auxiliary plate being fill a space between the base frame and the print head, which is installed does not protrude below the nozzle unit.

Apparatus for manufacturing a coated steel sheet using an ink-jet printing according to an embodiment of the present invention is capable of producing a continuous coil process. And while the process is simple, a high production rate and efficiency.

And by using the ink-jet printing, and it may implement the various patterns and colors can be printed on the plates computer digital image without distortion. Therefore, since the implementation of the resolution available, can be produced premium print sheet is applicable to such appliances or interior and exterior.

Whereby a plurality of print heads arranged in a printing area in the width direction of the steel plate by installing a second plate so as not to cause height variation around the ink head in the width direction of flow generated can prevent the image quality degradation.

And the steel sheet can be secured to a uniform flow field in the direction of progress can be accurately dropped to the position where the ink droplets in the print target area, the printed image quality of the steel sheet can be advanced.

And it can be prevented from occurring during the sliding transfer by using a tension control device in close contact with the transfer unit maintaining the steel sheet come out flat and remove the wave of the plates before they enter the print area.

And can be controlled in that the steel sheet skew using a skew control system to prevent the distortion of the image in which the ink is required.

And by using the speed control unit it can be supplied to the steel sheet to fall into the correct position in which the ink is required at a constant rate.

And may contact the transfer by using the unit steel sheets have no residual wave comfortably held in an expanded state evaluation by maintaining a constant distance between the print head and the plate in the printing area and preventing the steel sheet is to impact the head breakage occurs.

And it may use a steel plate upper gap adjusting unit to control the distance between the print head and the steel sheet.

Further, with the multi-layer structure, but the installation device for printing lines on the upper layer, and can be selected to be switched to the upper line in the lower lines it may be used to process efficiently.

And it can be protected from vibration generated from the equipment around by providing the structure where the printing apparatus installed in the upper line in a stand structure and can be expected of high-quality print output.

Further, the steel sheet to lower the wave height of the steel sheet into the set range can be prevented from impact the print head to dig using the control unit.

Further, it is possible to prevent the occurrence of uneven flow that may affect the print head using a base frame or a dummy ink head.

1 is a view schematically showing an apparatus for manufacturing a coated steel sheet according to the first embodiment of the present invention.

2 is a view showing the state that does not use the upper line in the apparatus for manufacturing a coated steel sheet.

3 is a view showing the state, but using the upper line in the apparatus for manufacturing a coated steel sheet that does not use the printing apparatus.

Figure 4 is a side enlarged view showing a difference falling point of the ink according to the influence of the ambient air flow.

Figure 5 is a side view of a printing unit according to the first embodiment of the present invention.

Figure 6 is a bottom view showing a printing unit according to the first embodiment of the present invention.

7 is a side enlarged view of the printing unit according to a second embodiment of the present invention.

8 is a structural view for explaining a contact transfer unit according to the first embodiment of the present invention.

9 is a structural view for explaining a contact transfer unit according to a second embodiment of the present invention.

10 is a graph showing the relationship between the maximum height difference, and the radius of curvature of the contact transfer unit.

11 is a view schematically showing an apparatus for manufacturing a coated steel sheet according to the second embodiment of the present invention.

Figure 12 is a side view of the peak control unit according to an embodiment of the present invention.

Figure 13 is an enlarged view showing the state prior to the steel sheet, coming past the control unit.

Figure 14 is an enlarged view showing the state after the last control unit to the steel sheet, coming.

15 is a graph showing the state of the wave plate changes over the control unit coming.

16 is a perspective view from below of a printing unit according to the third embodiment of the present invention.

17 is a side cross-sectional view of a printing unit according to the third embodiment of the present invention.

Figure 18 is a bottom view of the printing unit according to the third embodiment of the present invention.

19 is a side view showing the enemy falling point of the ink liquid due to the influence of the ambient air flow when there is no base frame.

Figure 20 is a side view showing the dropping point of ink droplet from the third embodiment of the present invention.

Figure 21 is a photograph showing the print quality in accordance with the distance between the steel sheet and the print head.

22 is a graph showing the development flow minimum distance corresponding to the distance between the steel sheet and the print head.

Figure 23 is a photograph showing the print quality in accordance with the traveling speed of the steel sheet.

24 is a graph showing the minimum distance according to the developed flow rate of progression of the steel sheet.

Figure 25 is a side cross-sectional view illustrating, on an enlarged scale, the coupled state of the print head.

26 is an illustration showing a flow of a printing unit according to the third embodiment.

27 is a photograph showing the print quality in accordance with the height of the step.

28 is a graph showing the ink side speed in accordance with the traveling speed of the steel sheet.

29 is a perspective view showing a state that installation of the first auxiliary plate.

30 is a graph showing the ink side speed in accordance with the traveling speed of the steel sheet after installing the first auxiliary plate.

31 is a perspective view showing a state that installation of the second auxiliary plate.

32 is a perspective view showing a state that installation of the first and second auxiliary plate.

33 is a side cross-sectional view of FIG.

Hereinafter will be described in detail with reference to the accompanying drawings, the embodiments of the invention.

Example introduced below are intended to be provided as examples in order to ensure that features of the present to those having ordinary skill in the art invention can be sufficiently delivered. The invention may be embodied in different forms and should not be limited to the embodiments described below. Parts not related to the description in order to clearly describe the present invention was omitted from the drawings In the drawings, the width of the component, the length, thickness and the like may be exaggerated for convenience. The same reference numerals throughout the specification denote like elements.

1 is a view schematically showing an apparatus for manufacturing a coated steel sheet according to the first embodiment of the present invention.

Although not shown in the figure, the steel sheet may undergo a step of forming a coating layer before entering the printing process. That is, the apparatus for manufacturing a coated steel sheet by using a process and ink-jet printing on the coated film layer to form a coating layer may include the step of forming the printed layer. The coated steel sheet means the coating layer or printing layer is formed on the steel sheet surface.

Apparatus for manufacturing a coated steel sheet is skew control device for preventing the steel sheet is bent support instead of the tension control device 10 for imparting tension to maintain a flat condition, the steel strip traveling shifted from side to side without moving along the center of the production line, 20, a speed control device (30, 40), and the separation between the printing ink to the plate printing the pattern or color that to when to drop the printing ink to the steel sheet accurately fall in a position to print the required keeping the traveling speed of the steel strip which may include the printing device 100. the

Referring to the drawings, the tension control device 10 from the entering direction of the steel plate, skew control device 20, a deflector roll (51) (Deflector Roll), dancer roll (53) (Dancer Roll), the speed control device 30, , the printing apparatus 100, a deflector roll 52, and a speed control device 40 can be continuously provided with.

The tension control device 10 includes a tension brie the roll (11, 12) can be maintained within a range set tension of the steel sheet by controlling the speed and the angle of contact (TBR Bridle Tension Roll). Tension range may be set in the range fracture does not occur by too excessive tension while also creating come out flat the surface of the steel sheet shape. For example, the tension range may be set within 2 kgf / mm2 to about 4 kgf / mm2 range. At this time, the tension error of the steel sheet is adjusted to be within a range of -1% to + 1%, it is possible to keep the tension of the steel sheet.

The debris tension roll (11, 12) may comprise two rolls arranged adjacent. And the steel sheet is lower tension debris to roll 12 which is located (hereinafter referred to as the rear) entering direction (hereinafter, the front quot;) enters along an upper surface of the tension brie the roll 11 and advanced direction which is located to advance along the surface. At this time, it is possible to adjust the size of any of the by changing the vertical position (or the horizontal position) of the tension roll debris (11, 12) tension applied to the steel sheet.

And the rear of the debris tension roll (11, 12) there is a tension measuring sensor 13 for measuring the tension of the steel sheet can be installed. Tension measurement sensor 13 transmits a signal to the tension control system 14 to measure the tension of the steel sheet. And tension control system (14) if the measured tension is equal to or greater than the preset range of the steel plate passes the tension debris to roll motion signal (11, 12) to lower the tension of the steel sheet, and that the tension of the steel plate measured below the set range If it delivers an operation signal to the tension debris rolls (11, 12) to increase the tension of the steel sheet.

Of; (Steering Roll SR) skew control device 20 has a steering roll (21, 22) according to the skew amount approximately off-center in the width direction center position is steel transfer line of the steel sheet indicating in skew measurement sensor 23 It can rotate and move the axis. For example, the amount of meandering of the steel plate may be managed within -1 mm to +1 mm range.

A steering roll (21) and (22) may be located in rear of the tension rolls debris 11,12.

Further, the steering roll (21) and (22) may comprise two rolls arranged adjacent. And the steel sheet can be transported along the upper surface of the two rolls which are adjacent. At this time, it is possible to control the meandering of the steel sheet by changing any one of a steering roll 21, the steel plate width direction position (or the steel plate width direction of the slope of the axis of rotation) of the.

And the rear of the steering roll (21) and (22) may skew the measurement sensor 23 to measure the skew of the steel sheet may be installed. Skew measuring sensor 23 delivers a signal to the skew control system 24 to measure the skew of the steel sheet. And skew control system 24 is steered to move the plate to the right when the steel sheet when the skew to the right passing the operating signal to the steering roll (21, 22) so as to move the plate to the left, and the steel sheet is skew to the left and it delivers an operation signal to the roll (21, 22).

In addition, skew measurement sensor 23 may be connected to the printing apparatus 100. For example, when the skew degree of the steel sheet exceed the danger zone can be so that the printing apparatus 100 to stop the operation.

Speed ​​control apparatus 30 and 40 are pinch rolls 31 and 41; it is possible to adjust the rotational speed of (PR Pinch Roll) maintaining the speed of the steel strip traveling direction to the set speed. The speed of the steel sheet should be kept constant because the number of ink drops are printed in the desired position. In one embodiment, the set speed of the steel sheet may be chosen within the range of 30 mpm to 50 mpm. At this time, the actual variation amount of the traveling speed of the steel plate may be managed within -25 μm / sec to +25 μm / sec range.

Pinch rolls (31, 41) may comprise two rolls are disposed above and below the steel plate. At this time, by changing the rotational speed of one or more pinch rolls (31, 41) it is possible to adjust the traveling speed of the steel sheet.

Further, the pinch rolls 31 and 41 can be reduced in the width direction vibrations while securing the movement of the width direction of the steel sheet. For example, the pinch rolls 31 and 41 are adjusted to maintain the horizontal amplitude of the steel plate to within -11 μm to +11 μm range.

Further, the pinch rolls 31 and 41 may be installed in at least one of the front and rear of the printing apparatus 100. The figure is shown to be installed, the pinch rolls 31 and 41 in both the front and rear of the printing apparatus 100. However, the pinch rolls 31 and 41 may control the speed of pushing the installed only on the front plate of the printing apparatus 100 is installed only on the rear control the speed while pulling a steel plate or the printing apparatus 100 of.

And the deflector rolls 51 and 52 may be used to change the moving direction and angle of the steel sheet. In one embodiment, provided between the skew control unit 20 and the speed control device (30, 40) provided between changing the traveling direction of the steel sheet, the printing apparatus 100 and the speed control device (30, 40) the traveling direction of the steel strip You can change.

And the dancer roll 53 is thereby a vibration reduction member disposed between the base and can be moved within a small range in the vertical direction of the steel sheet. Therefore, dancer roll 53 it is possible to reduce the vibration of the steel plate, and may further adjust the tension of the steel sheet. Specifically dancer roll 53 can be reduced, the vibration of the steel plate generated over the tension control device 10 and the skew control device 20. For example, dancer rolls 53 is adjusted to maintain the vertical amplitude of the steel plate to less than -60 μm + 60 μm.

On the other hand, the printing apparatus 100 controls the vertical position of the contact transfer unit 120 and a steel sheet to expand come out flat without the support plate to bend in the jetting region (Jetting zone) or printing area (A) the ink drop location and a position adjustment unit of the steel plate support rolls 131 and 132, which may include the printing unit 110 to drop the printing ink to the steel sheet.

Adhesive transport unit 120 is brought into close contact with the plate on the conveyor belt 133 may come out flat the surface of the steel sheet. In front of flat one-way the surface of the steel sheet that was achieved through a tension control device 10. But hagenama fine steel surface, thereby remaining a wave remains. But again be described later, the distance between the print head 111 and the steel plate (the stand-off, Stand Off) is 0.8 mm to since provided in a range of 1.2 mm 30 mpm to 50 mpm steel sheet is an ink head (111 traveling at a speed of ) when colliding with a printing apparatus 100 may be damaged. Therefore, by using a separate adhesive transport unit 120 to remove the residual wave.

And the steel plate position adjustment of the support rolls (131, 132) unit to adjust the vertical position of the plate support rolls 131 and 132 for controlling the up and down direction at a given steel sheet while supporting the steel sheet falls on the correct position of the printing ink to plate It may be so. For example, steel support rolls 131 and 132 position adjustment unit can adjust the vertical position of the plate support rolls 131 and 132 to maintain the vertical amplitude of the steel plate to less than -60 μm + 60 μm.

The printing unit 110 can be given sprayed with printing ink to the steel sheet moving in the print area (A) to execute a design printing on the surface of the steel sheet. This will be described in detail later with respect.

Next, with reference to Figure 3 and Figure 2 will be described with respect to the process of the apparatus for manufacturing a coated steel sheet is provided with multi-layer line.

Figure 2 is a view showing a state that does not use the upper line in the apparatus for manufacturing a coated steel sheet, 3 is a view showing the state, but using the upper line in the apparatus for manufacturing a coated steel sheet that does not use the printing apparatus 100.

Apparatus for manufacturing a coated steel sheet according to an embodiment of the present invention may be provided as a multi-layer lines including a lower line and an upper line. At this time, the tension control device 10 described above, the meandering control unit 20, a speed control device (30, 40), and the printing apparatus 100 and the like may be provided on the upper line. That is, the upper line and the preparation process for the print on the steel sheet, and the step of printing using an ink-jet printing, may be made a process for improving the print quality.

Or less, prior to entering the upper line a step formed in a lower layer referred to as front-line, and then as a step after the printing process is complete, the steel sheet. Pre-process and post-process was not shown in the drawings, and are not otherwise specified.

The upper line comprises a structure disposed on the lower line, and each of the devices may be placed in the structure.

At this time, it is possible to print device 100 is provided in a printing structure (73) is disposed is a rear structure 72 which is located in the front structure 71 and a rear which is located at the front and independently. In one embodiment, the front structure 71, tension control device 10 is formed on, skew control device 20 and the first speed control device 30 may be provided, a rear structure (72) a second speed control device formed on may be 40, it is provided.

In addition, the front structure 71 and the rear structure 72 is provided integrally to form an upper structure, the printing structure 73 may be independently installed in the opening formed in the upper structure.

The front structure 71, tension control device 10 and the skew control device 20 are provided on the generate the vibration and work because it includes a separate driving force, results in a speed error of the steel sheet. If, the printing apparatus 100 is installed, if with these on the front structure 71, it is not possible to achieve high resolution and Early Printing property by the vibration and the speed error generated in the structure.

In particular, the ink head 111 in close contact with the transfer unit 120 are highly susceptible to vibration. Because ink heads may be provided in the range of 111 and a distance between 0.8 mm to 1.2 mm between the steel plate, when the vibration occurs in the ink head 111 and the contact transfer unit 120 is an error in the printing image of the desired product It can cause serious cases, can lead to damage of the print head 111. Therefore, the printing apparatus 100 may be installed on the printing structure 73, which is provided independent of the front structure (71).

Lower line may be a steel strip traveling direction control device 60 installed. The steel strip traveling direction control device 60 may include a fixing roll 61 and the mobile rolls (62, 63). The movement rolls the steel sheet in contact with the bottom of the first mobile roll 62 and the stationary roll 61 to switch the traveling direction of the steel sheet in contact with the rear of stationary roll 61 to the upper portion to the steel sheet enters the upper line upper layer the may include a second mobile roll 63 which does not move in the line to pass into the lower line. First moving the roll 62 and the second mobile roll 63 may be arranged to move so as not to contact or in contact with the fixing roll 61, respectively.

In addition, the first mobile roll 62 and the second mobile roll 63 may be installed to change the position where the movement of the one roll in contact with the fixing roll 61. At this time, it is possible to use a plurality of cylinders and a joint for movement of the location of the mobile roll.

Referring to FIG. 2, in the case in contact with the bottom of the second mobile roll 63, the fixing roll 61, the steel sheet does not move in the horizontal direction onto the upper line. Therefore, it is possible to move the case that does not require a separate printing process, moving roll 62 down to a fixed roll 61.

Referring to Figure 3, if the first mobile roll 62 is in contact with the rear of stationary roll 61, the steel sheet enters and moving up to the upper line. For example, the steel strip traveling direction of the upper control device 60, the tension control device 10 is installed, the steel sheet has passed through the steel strip traveling direction, the controller 60 may immediately enter a tension control device 10.

Further, even if the steel sheet is entering the upper line may perform the print process. To this end, adjusting the vertical position of the pinch rolls of the pair located at the front and rear of the printing apparatus 100 (31, 41) and can adjust the transfer height of the steel sheet. Further, by moving the print head 111 of the printing apparatus 100 to the top it may be such that the ink head 111 and the contact transfer unit 120 going to each other. For example, the ink head 111 is moved, and a pair of pinch roll stand close contact transfer unit 120. If the (31, 41) than when moving over so small steel plate is not to interfere with the ink head 111 over the It may pass without contact. Therefore, the steel sheet may be delivered to the next process line of the upper layer without passing through the printing process.

Next, with reference to FIG. 4 to FIG. 7 to be described to the printing unit 110 according to an embodiment of the invention.

Figure 4 is a side enlarged view showing a difference falling point of the ink according to the influence of the ambient air flow.

Steel is the 1500s at a relatively high speed creates a constant airflow around the sheet. Therefore, the ink dripping from the nozzles 3 is dropped to not falling vertically move in the traveling direction of the steel sheet. However, if the air flow is uniformly formed in each of the print head 1 does not affect the quality of the printed image. However, if the any one of the non-uniform flow to the print head (1) occurs a fear of the printing image is distorted.

Around the print head 1 may result in non-uniform flow. Non-uniform flow is changed the dropping point of the ink results in a degradation of printing image. Assuming that a single print head (1), can be by the front and non-uniform flow of both sides of the print head 1 of the ink head (1) fall outside the quality of the printed image. However, the rear portion of the ink head 1 is less likely to result in non-uniform flow to the influence of the air flow formed by the steel plate.

It is also possible, if a plurality of print head 1 are provided in the traveling direction of the steel sheet, the print head 1 to the position to the front take a lot of influence of the peripheral flow affect the falling point of the ink. Ink head positioned on the inner side relative to (1) receive less influence of the ambient air flow. Further, the ink head 1 to the position at the rear also less likely to result in non-uniform flow to the influence of the air flow formed by the steel plate.

Figure 5 is a side view of the printing unit 110 according to the first embodiment of the present invention.

Referring to FIG. 5, the printing unit 110 is cured to harden the ink to prevent the ink head 111 are the nozzle 112 ppuryeoju printing ink is mounted, away from the ink on the steel sheet is not more than the amount appropriate spreading It may include a device 113 and the ink supply device 114, which may continue to supply the ink with no bubbles.

The ink head 111 may be is provided with a nozzle 112, a plurality are arranged so as to face down and the plurality of nozzles 112 are doedoe arranged side by side in the width direction of the steel plate, arranged at uniform intervals.

And the ink supply device 114 may be connected to the ink head 111, is coupled to the desorption and the ink head 111 may be adapted to be replaced when the ink is low.

Further, the ink head 111 may be a plurality of side by side arranged in the traveling direction of the steel sheet. At this time, each of the ink head 111 is disposed in the traveling direction of the steel sheet can give sprayed with ink of different colors. For example, the moving direction from the front side of the steel plate C (Cyan), M (Magenta), Y (Yellow), K (Black) ink head 111 ppuryeoju ink colors can be side-by-side arrangement.

Further, the ink head 111 ppuryeoju ink having a single color may be disposed so that the plurality of print heads 111 overlap in the width direction of the steel sheet. Sufficient case, a print head 111 is one, but can assume the color, the width of the length of the ink head 111, the steel plate length extent that the length of the print head 111 to cover the width length of the steel strip If the smaller may be used to connect a plurality of the ink head 111 in the width direction of the steel sheet.

Referring to FIG. 5, the embodiment of the present invention two ink heads 111 are arranged side by side in the width direction of the steel sheet. At this time, the print head 111 is disposed so as to doedoe part overlaps the nozzles 112 may be disposed so as not to overlap. More specifically, the nozzle to the distance is close between a right outermost nozzles 112 of the ink head 111 which is located at a position with the right side of the nozzle 112 on the left, the outermost of the ink head 111 which is located on the left It may be arranged to match the spacing between (112).

Curing unit 113 may cure the ink by ultraviolet radiation (UV). The ink drop (Droplet) sprayed on a steel sheet can be spread continually over time. However, the larger the ink droplet size resolution of the printing image is lowered. Therefore, curing unit 113 may give a solidified ink so that the ink is not more than the amount appropriate spreading.

And curing apparatus 113 may be disposed behind the print head 111. For example, the ink in the rear head 111 that is responsible for one color the curing apparatus 113 may be disposed. In this case, in the traveling direction of the steel sheet C ink head 111 of the color, the curing apparatus 113, the ink head 111 of the M color, a curing device the ink head 111 of the 113, a Y color, a curing device (113 ), the ink head 111, and a curing device 113 of K color may be arranged side by side.

On the other hand, the distance between the steel sheet and the nozzle 112 of the ink head 111 may be adjusted in the range of 0.8 mm to 1.2 mm. The precise control of the steel sheet and the nozzle is located less than 1.2 mm distance increases when the ink between 112 becomes difficult, and is much less reliable in the printing image. Ink will fall on the steel sheet moving at a high speed, it is due to the influence of the surrounding atmosphere for falling. In addition, the steel sheet and the nozzle 112 when the distance is smaller than 0.8 mm between the steel plate arises is the potential to impact the print head 111. Plate is not provided between the completely flat because it contains a fine wave plate and print head 111 is because the required clearance.

Figure 6 is a bottom view showing the printing unit 110 according to the first embodiment of the present invention.

Referring to FIG 6, the printing unit 110 according to the first embodiment of the present invention may include a base frame 115 for fixing the ink head 111 and the curing device (113). Base frame 115 may be binding on the plurality of print head 111 and the plurality of curing unit 113 as a unit. For example, the base frame 115 may be disposed to cross the plurality of the ink head 111 and the plurality of curing apparatus 113. The

And the base frame 115 may be formed in the second opening (115b) for exposing an irradiation section of the first opening (115a) and the curing device (113) for exposing the nozzle 112 of the print head 111.

And the base frame 115 is secured to the flow development distance to fall exactly in the position where an ink droplet target is possible to ensure a uniform flow field within a printing area (A).

To this end, the bottom surface of the base frame 115 may be located beneath the print head 111. For example, the bottom surface of the base frame 115 may be located at the bottom in a range that does not go down below the position of the nozzle 112.

Base frame 115 may be prevented from changing the dropping point of the ink by the air current around the nozzle (112). That is, the base frame 115 may be such that a uniform flow is formed within the features so as to extend a certain distance into the front and rear and both sides of the nozzle 112, the printing area (A). The printing area (A) means a region in which the region or the ink to the nozzle position 112 is printing image formation off.

7 is a side enlarged view of the printing unit 110-1 according to a second embodiment of the present invention.

Referring to Figure 7, the printing unit 110-1 may be a pile (Dummy) unit is disposed in front of the ink head 111 is positioned at the front. Doedoe dummy unit is installed in front of the two print heads 111 from the second position located at the front in order to create the conditions, such as the ink head 111, which does not actively function. And dummy unit may ensure the uniform flow field in the ink droplets are printed area to fall exactly at a target position (A).

Dummy unit may include a dummy ink head 116 and the curing device pile 117. In this case, in the traveling direction of the steel sheet pile of the ink head 116, the dummy curing device 117, the ink head 111 of the C color, the curing apparatus 113, the M color ink head 111, a curing device (113) , the ink head 111 in the Y color, a curing unit 113, a print head 111, and a curing device 113 of K color may be arranged side by side.

That is, the same as the ambient conditions of the dummy ink head 116 and the dummy curing device 117, the ink head 111 which is located around the conditions of the C ink head of the color (111) positioned at the front in the second or less and, it can be the same as the effect of air flow on the print head 111.

Dummy unit can be used in cases difficult to install the base frame 115, shown in Fig. For example, when the steel sheet in the print zone (A) is provided to have a curvature to be arranged in the curvature of the ink head is also 111. The distance between the steel sheet and the print head 111 because it must be constant. In this case, due to the difficulty of installing the base frame 115, it may be provided to the dummy unit on the front print head 111 to the position at the front.

8 is a structural view for explaining a contact transfer unit 120 according to the first embodiment of the present invention.

Adhesive transport unit 120 is the front and the steel support rolls for supporting the steel plate on the rear (131, 132), a rotational movement the conveyor belt 133, which along with steel, while movement of the steel sheet, vacuum pressure to adsorb the steel plate forming which may include a pump 135 is provided with a vacuum chamber 134, the vacuum pressure.

Steel support rolls 131 and 132 may be provided to support the conveyor rolls and integrally supporting the conveyor belt 133. In this case, the conveyor belt 133 is disposed so as to surround the plurality of plate support rolls 131 and 132, it is possible to form a caterpillar. And the steel plate is movable, being supported on the conveyor belt 133 with the conveyor belt 133.

The conveyor belt 133 may be provided to allow for deformation. Therefore, even if the rotational orbit non-circular may be a continuous rotary motion. And the front plate support roll 131 and the steel support roll 132, which is located at the rear which is located on the conveyor belt 133 is to apply a tensile force to the conveyor belt 133, a conveyor belt in a printing area (A) ( 133) can be maintained to be flat easily. However, even if the conveyor belt 133 is maintained because of the ease of flat steel plate, the fine wave entering the adhesive transport unit 120, there is liable to cause a gap between the conveyor belt 133.

On the other hand, it has been described that the distance between the steel sheet and the print head 111 to be constant because the front close the distance between the steel sheet and the print head 111. Contact transfer unit 120 for this, it is possible to form a vacuum pressure to the conveyor belt 133 to contact the steel plate to the conveyor belt 133.

The inner space of the conveyor belt 133. To this end, there may be may be provided with a vacuum chamber 134, a vacuum chamber 134 is vacuum pressure is connected to the pump 135 is formed. And the conveyor belt 133 may be binary pneumatic forming a plurality of vacuum holes or slits so that the vacuum can act on the steel sheet. That is, the vacuum pressure formed in the vacuum chamber 134 is a suction plate acting on the steel sheet through the vacuum holes or the vacuum slit. Therefore, the steel sheet may be in close contact with the conveyor belt 133 come out flat.

9 is a structural view for explaining a contact transfer unit 120-1 according to a second embodiment of the present invention.

Contact transfer unit 120-1 is steel support rolls for supporting the steel plate on the front and rear of the plate (131, 132) and, with the conveyor belt 133 while rotating and moving along with the steel sheet, by pressing a steel plate conveyor belt It may include a pump 135 that provides the steel pressure roll (136, 137), a conveyor belt expansion chamber 138 which was formed in a curved surface expanding the 133, the inflation pressure of close to 133.

Steel support rolls 131 and 132 may be provided to support the conveyor rolls and integrally supporting the conveyor belt 133. In this case, the conveyor belt 133 is disposed so as to surround the plurality of plate support rolls 131 and 132, it is possible to form a caterpillar. And the steel plate is movable, being supported on the conveyor belt 133 with the conveyor belt 133.

The conveyor belt 133 may be provided to allow for deformation. Therefore, even if the rotational orbit non-circular may be a continuous rotary motion. And the conveyor belt 133 may be provided over the convex curved surface. At this time, the surface of the conveyor belt 133 may have a constant radius of curvature.

And steel pressure roll (136, 137) may have to press a steel plate at the front and rear of the conveyor belt 133 to the steel sheet in close contact with the conveyor belt 133. Therefore, the steel sheet is also in close contact with the conveyor belt 133. When the conveyor belt 133 to form a convex curved top forms a convex surface up.

On the other hand, it has been described that the distance between the steel sheet and the print head 111 to be constant because the front close the distance between the steel sheet and the print head 111. Therefore, when the ink head 111 is disposed in a curvature, such as the curvature of the steel plate while being arranged over the plate into a convex curved surface, the distance between the steel sheet and the print head 111 can be kept constant.

Next will be described a configuration where the conveyor belt 133 can be rotated continuously while maintaining the convex surface upward.

In a way to be convex in the shape of the conveyor belt 133 to the top set up a base having a convex shape at the bottom of the conveyor belt 133 and the conveyor belt 133 can be moved slip on the surface of the base have. However, a static friction to be kept between the base and the moving state of the conveyor belt 133 is present, there is room to cause problems with noise and durability.

Therefore, the plurality of close contact to the surface of the transfer unit 120-1 according to a second embodiment of the present invention, but provided over the expansion chamber (138) having a convex shape under the conveyor belt 133, expansion chamber 138, a hole or a slit shape, and may provide an air-pressure via pump 135, which is connected to the expansion chamber (138). That is, the air pressure formed in the expansion chamber (138) can act on the conveyor belt 133 through the holes or slits of the expansion chamber 138 portion of the conveyor belt 133. Therefore, it is possible to the conveyor belt 133 is removed, the friction can be rotated while kept away from the expansion chamber 138 and the predetermined distance. For example, the distance between the conveyor belt 133 and the expansion chamber (138) mounted sliding by the expansion chamber 138 may maintain a 10 μm to 50 μm.

On the other hand, the curvature of the conveyor belt 133 is related to the size of the tension provided by adding to the steel sheet. That is, the more greatly the curvature of the conveyor belt 133, the larger the size of the tension is provided more to the steel sheet. For example, contact transfer unit 120-1 may determine the curvature of the conveyor belt 133 so as to add 0.2% to 1.0% less than the tension of the tension which is applied to the steel sheet.

To this end, and the length of the steel sheet is provided with a curved surface in the printing area (A) to be adapted to the steel sheet in the printing area (A) increases to within 0.2% to 1.0% than the length of time the arrangement come out flat, the conveyor along its length It can determine the radius of curvature of the belt 133. When the printing area (A) of the steel sheet is provided with a curved surface on a circular arc, the straight line length of the printing area (A) when the steel sheet is laid flat is easier, the length of the current across the arc. Therefore, the length of the arc to find the radius of curvature in a range higher than a chord length less than 0.2% to 1.0%.

For example, according to this calculation, if the linear length of the printing area (A) is 3,000 mm, the radius of curvature may be provided to within a range from 5,000 mm to 5,500 mm.

10 is a graph showing the relationship between the maximum height difference, and the radius of curvature of the contact transfer unit (120).

The horizontal axis represents the radius of curvature of the conveyor belt 133, and the vertical axis indicates the height of the center of the steel plate is provided with a curved surface. That is, the greater the radius of curvature of the conveyor belt 133 is reduced to increase the central portion of the steel sheet, the two are in the relationship of a quadratic function. And the graph represents the radius of curvature and the maximum height difference at the time when the length of the printing area (A) to 3,000 mm.

According to the graph, when the radius of curvature within the range of 5,000 mm to 5,500 mm, the center portion of the steel sheet is raised to within a range from 150 mm to 250 mm.

11 is a view schematically showing an apparatus for manufacturing a coated steel sheet according to the second embodiment of the present invention.

Apparatus for manufacturing a coated steel sheet according to the second embodiment of the present invention can steel sheet further comprises: a wave height adjustment unit 140 by plastic deformation of the steel sheet before the entry to reduce the wave height of the steel sheet to the printing apparatus 100 . The dig is meant the height of the highest point on the wave of steel.

Figure 12 is a side view of the peak control unit 140 according to an embodiment of the present invention.

Digging control unit 140 includes a front sensor (143), coming to may be, reduce the wave height of the steel sheet, coming adjusting roll measuring the wave height of 141, and the steel sheet in place on the printing apparatus 100 can do.

Digging control rolls 141 and 142 may be a pair of rolls disposed above and below across the plate, and successively arranged more than one in the traveling direction of the steel sheet. And a couple of wave height adjustable roll (141, 142) of can be disposed in contact with the upper and lower surfaces of each steel sheet. Or a pair of wave height adjustable roll (141, 142) of can be disposed apart by a distance corresponding to a set, coming to the peak control unit 140 target. In addition, the peak controlled rolls 141 and 142 may adjust the distance between the wave modulation of a pair provided to allow the horizontal moving roll (141, 142).

Digging sensor 143 is a continuous process of the steel sheet when the digging control roll is disposed in the rear of the 141 and 142 measures the wave height of the steel sheet, detects that the of the plate measured from a digging sensor 143, digging or more range the can be stopped.

For example, the peak sensor 143 may be disposed away from one surface of the steel sheet, sending a signal towards the steel sheet to recover it to measure the wave height of the steel sheet. Or digging sensor 143 may be controlled, coming oil 140 units is arranged away from the steel sheet by a distance of the set wave height aiming. Therefore, if the steel sheet is bonded to the wave height measurement sensor 143 can stop the continuous process of the steel plate to be viewed with the risk of damage to the ink head 111.

Figure 13 is an enlarged view showing the state prior to the steel sheet, coming past the control unit 140, FIG. 14 is an enlarged view showing the state after the steel sheet, coming past the control unit 140. And Figure 15 is a graph showing the state of the wave plate changes while coming through the control unit 140.

If, coming with a convex wave plate up before the end of the control unit 140, over the peak regulation rolls 141 and 142 can be changed to a convex wave below the direction of the wave height changes. However, after the last digging control rolls 141 and 142 are returned to the wave of the original direction again by the spring back phenomenon. However, the height of the plastic deformation rose up past the wave height adjustment roll 141, coming before than coming from the process becomes small. Or in the case of the original wave height of not greater after the peak in the last control rolls (141, 142) because the degree of plastic deformation smaller wave direction will not change.

The graph shows an example in a steel plate having a wave height of 3 mm before the end of the peak control unit 140 as an example. Steel sheet over the first wave height adjusting roll 141 will have the digging of -1.67 mm. That is, it has a wave height of 1.67 mm concave downward. However going back to the first digging control roll 141 after the last wave by a springback phenomenon back to its original state will have the wave height of 1.0 mm convex top.

Over the second wave height adjusting roll 142 it will have the next wave height of 0.2 mm. If this was not the direction of the wave changes as you go through the first wave height adjusting roll (141). And two is the wave height increases by a springback phenomenon after the last second, coming regulation roll 142, and consequently the steel sheet over the two wave height adjustment single rolls 141 and 142 will have a wave height of 0.5 mm.

Hyeonpyeon, the peak sets of wave height adjusting unit 140 may be set in the range of 80% or less of the distance between the print head 111 and the steel plate. Therefore, if the measurement by the wave height measurement sensor (143) exceeds the wave height of the steel sheet, coming set it can stop the continuous process of the steel sheet.

Next, with reference to FIG. 16 to 18 describing a printing unit 110-2 according to the third embodiment of the present invention.

16 is a perspective view from below of the printing unit 110-2 according to the third embodiment of the present invention. And Figure 17 is a cross-sectional side view of the printing unit 110-2 according to the third embodiment of the present invention, Figure 18 is a bottom view of the printing unit 110-2 according to the third embodiment of the present invention.

Printing unit 110-2 is a curing device 113 to harden the ink to prevent the ink head 111 are the nozzle 112 ppuryeoju printing ink is mounted, the ink dropped on the steel sheet is not more than the amount appropriate spreading and, it may include an ink supply device 114 capable of supplying a continuous ink without bubbles.

The ink head 111 may be is provided with a nozzle 112, a plurality are arranged so as to face down and the plurality of nozzles 112 are doedoe arranged side by side in the width direction of the steel plate, arranged at uniform intervals. Nozzle 112 may have to obtain a uniform print quality should be placed at regular intervals.

And the ink supply device 114 may supply ink to the nozzle 112 is connected to the ink head 111, and is coupled to the desorption and the ink head 111 may be adapted to be replaced when the ink is low.

Further, the ink head 111 may be disposed side by side a plurality dog ​​in the traveling direction of the steel sheet. At this time, each of the ink head 111 is disposed in the traveling direction of the steel sheet can give sprayed with ink of different colors. For example, the moving direction from the front side of the steel plate C (Cyan), M (Magenta), Y (Yellow), K (Black) ink head 111 ppuryeoju ink colors can be side-by-side arrangement.

Further, the ink head 111 is ppuryeoju ink having a single color in a width direction of the steel sheet is a plurality of print head: it can be disposed (111 111-1, 111-2). If the length of the ink head 111 is sufficient enough to cover the width of the width of the steel sheet, but one of the ink head 111 is sufficient to charge a single color, the length of the ink head 111 steel If the width is less than the width it may be used to connect a plurality of the ink head 111 in the width direction of the steel sheet.

With reference to the figures, it may be disposed two ink heads (111-1, 111-2) are (parallel) side by side in the width direction of the steel sheet. 2 and of the ink head 111 comprises an ink head and 111-1 located at the front in the traveling direction of the steel sheet, which is located on the rear print head 111-2. And to the nozzle 112 is a nozzle 112-2 to the nozzle (112-1) which is located forward in the traveling direction of the steel plate and, positioned at the rear.

In addition it includes at least three print head 111 are disposed side by side in the width direction of the steel sheet.

The ink head 111 are arranged side by side can be arranged to overlap with a part in the traveling direction of the steel plate to each other. The outermost nozzles 112. At this time, each of the ink head 111 may be arranged so as not to overlap in the traveling direction of the steel sheet. More specifically, the ink, the distance between the left outermost nozzles 112 of the ink head 111, position of the nozzle 112 of the right outermost of the ink head 111 which is located on the left and which is located on the right side one adjacent nozzles in the head 111 may be arranged to match the spacing between (112). Thus, the nozzle 112 is disposed in the width direction of the steel sheet may be provided at regular intervals.

Curing unit 113 may cure the ink by ultraviolet radiation (UV). The ink drop (Droplet) sprayed on a steel sheet can be spread continually over time. However, the larger the ink droplet size resolution of the printing image is lowered. Therefore, curing unit 113 may give a solidified ink so that the ink is not more than the amount appropriate spreading.

And curing apparatus 113 may be disposed behind the print head 111. For example, the ink in the rear head 111 that is responsible for one color the curing apparatus 113 may be disposed. In this case, in the traveling direction of the steel sheet C ink head 111 of the color, the curing apparatus 113, the ink head 111 of the M color, a curing device the ink head 111 of the 113, a Y color, a curing device (113 ), the ink head 111, and a curing device 113 of K color may be arranged side by side.

And is a distance to be constantly provided between the ink head 111 and the distance between, the curing apparatus 113 to print head distance and, adjacent between the 111 and the curing device (113). Therefore, the extent to which each color is cured can be made uniform.

And the distance between the steel sheet and the nozzle 112 of the ink head 111 may be adjusted in the range of 0.8 mm to 1.2 mm. The precise control of the steel sheet and the nozzle is located less than 1.2 mm distance increases when the ink between 112 becomes difficult, and is much less reliable in the printing image. Ink will fall on the steel sheet moving at a high speed, it is due to the influence of the surrounding atmosphere for falling.

In addition, the steel sheet and the nozzle 112 when the distance is smaller than 0.8 mm between the steel plate arises is the potential to impact the print head 111. Since the steel sheet comprises a fine wave is not provided in a completely flat between the steel sheet and the print head 111 is necessary clearance.

Printing unit 110-2 may include a base frame 115 for fixing the ink head 111 and the curing device (113). Base frame 115 may be binding on the plurality of print head 111 and the plurality of curing unit 113 as a unit. For example, the base frame 115 is extended in the traveling direction of the steel sheet may combine a plurality of the ink head 111 and the plurality of curing apparatus 113. The

On the other hand, the drawings, one of the base frame 115. The print head 111 and the curing device (113) one of the been shown that the coupling unit, alternatively a plurality of the base frame 115 may be provided for each color have.

Base frame 115 may be formed in the second opening (115b) for exposing an irradiation section of the first opening (115a) and the curing device (113) for receiving the print head 111. With reference to the figures, the first opening (115a) of the base frame 115 may be provided about the size of which can accommodate a print head 111 arranged in the width direction of the steel sheet. And the irradiation section of the curing apparatus 113 may be a second opening (115b) into 2 mm into the state.

Base frame 115 may further include a coupling plate 150 to secure the plurality of print head 111 received in the first opening (115a) to the base frame 115. The ink head 111 is fixed to the coupling plate 150, the engaging plate 150 can be coupled to the base frame 115.

Coupling plate 150 may be manufactured separately to match the size and placement of the ink head 111. By using the coupling plate 150 is fabricated separately may utilize the print head 111 of different sizes, it is possible to change the arrangement of the ink head 111. In addition, custom-made by a coupling plate 150, it is possible to precisely place the nozzle 112 of the print head 111.

In addition, by using a coupling plate (150) can facilitate assembly and disassembly of the print head 111. For example, after the ink head 111 is decomposed to engaging plate 150 in the combined state, it is possible to separate the coupling plate 150 and the print head 111. If, when the combination of print head 111 to direct the base frame 115 may be difficult to assembly and disassembly of the print head 111.

Coupling plate 150 may be coupled to the upper surface of the base frame 115. For example, the state mounted on the base frame 115, the first opening (115a) face the seat surface (115c) coupled to plate 150 is seated around is provided, the engaging plate 150 is secured (115c) of fixing may be by using a bolt (not shown), such as from.

Couples the base frame 115, the ink head 111 is first coupled coupling plate 150 to the base frame 115 in a state fixed to the print head 111 in the plate 150 in order to secure the on.

On the other hand, the binding site of the base frame 115 and the connecting portion or the engaging plate 150 of the engaging plate 150 and the ink head 111 may result in generating a gap and height variation. Though not shown, material, having elasticity in their binding site, for example by interposing a rubber ring or the like can be sealing (sealing). Elastic material such as rubber are able spicy gap and can compensate for variations in height.

19 is a side view showing the enemy falling point of the ink liquid due to the influence of the ambient air flow when there is no base frame 115.

Steel is the 1500s at a relatively high speed produces a constant air flow (flow) around the sheet. Therefore, falling into less vertical falling liquid ink in the nozzle 112 is not moved apart in the traveling direction of the steel sheet.

Uniform flow field is formed in the direction of movement of the plate around the ink head 111 does not affect the quality of the printed image. However, if any of the ink head 111, the non-uniform flow around occurs, or even as a uniform flow flow field formed in a width direction of the steel sheet has a fear of the printing image distortion.

Around the ink head 111 may result in non-uniform flow. Non-uniform flow is changed the dropping point of the ink results in a degradation of printing image. In particular, the ink head 111 to the position at the front is influenced by the forward air flow, both sides of the print head 111 is likely to drop ink droplets under a non-uniform flow under the influence of the ambient air flow. However, the ink head 111 which is located at the rear may be less relative to the ink droplets in a uniform flow state.

Figure 20 is a side view showing the dropping point of ink droplet from the third embodiment of the present invention.

Base frame 115 can be secured to the flow development distance to fall exactly in the position where the ink droplets target ensuring a uniform flow field within a printing area (A). That is, the base frame 115 is secured to flow development distance on both sides of the front and the ink head 111 of the ink head 111 which is located located on the front so as to extend forward and at a constant distance a side of the ink head 111 and it may be such that a uniform flow is formed in the printing region (a). The printing area (A) refers to the area or areas have the ink liquid to the nozzle position 112 is printing image formation off.

Figure 21 is a photograph showing the print quality in accordance with the distance between the steel sheet and the print head 111.

Referring to Figure 21, when the distance between the steel sheet and the print head (111) 1 mm under the same conditions of printing speed 50 mpm and it can be seen that the enemy heutnalrim developing ink liquid does not almost occur. And if the distance between the steel sheet and the print head 111 is increased from 3 mm to 5 mm can be seen that with increased developer heutnalrim ink droplets. For example, when the distance between the steel sheet and the print head 111 is 5 mm and is in the transverse direction of more than 150 mm heutnalrim occurs in the longitudinal direction of the steel sheet, the steel sheet is also 6.73 degree angle generated by a heutnalrim.

In order to prevent the image quality deterioration of the ink according to heutnalrim (the distance between the steel sheet and the print head 111) print height should create a sufficient flow development distance that can ensure a uniform flow in the print area. The homogeneous flow is meant that the constant development of the flow field around the printing height interval.

22 is a graph showing the development flow minimum distance corresponding to the distance between the steel sheet and the print head 111.

22 is to be obtained through the flow analysis, the distance (Stand off) between the x axis of the nozzle 112 and the steel plate, y axis represents the least developed flow distance.

Printing conditions were the same as in the steel sheet speed, the ink ejection speed, resolution of 600 dpi in the 20 Khz of 50 mpm, print height of 0.7 mm, 1 mm, 1,5 mm, 2 mm, 2.7 mm, 3 mm, 5 mm It was different.

Referring to the graph, the nozzle 112 is in this case that enter the inner side of the base frame 115 (200), and a minimum flow development distance required for 201 if it is 0.3 mm protruding below the base frame 115 is varies, in the case where 0.3 mm into the inside 200 shows the minimum flow development shorter distance. However, it is designed so that the nozzle 112 as described above is recessed than the base frame 115 has a practical difficulty.

On the other hand, in the inlet portion 202 of the base frame 115, the longest distance flow development is needed because of the import of the outer flow field sucked between the steel sheet and the base frame 115.

These results can be calculated from the minimum distance to the first print head 111 position from the entrance portion of the base frame 115 in accordance with the printing height.

In order to proceed with printing under uniform flow nozzle 112 of the ink head 111 is positioned at the front is required to secure the least developed flow distance (L1) away from the starting end of the base frame 115, and minimal development flow distance (L1) can be derived from equation (1) below.

Equation 1

L1 = 9.25461 - 10.14318 * d + 11.49179 * d ^ 2 - 1.48561 * d ^ 3

(Where d refers to a Stand off distance between the nozzle and the steel plate)

In addition, the nozzle 112 nozzle 112 of the ink head 111 in order to proceed the print under the case of a type which projects below the base frame 115 (e.g., 0.3 mm extrusion), a uniform flow field to secure the least developed flow distance (L2) away in the forward direction, and at least developing flow distance (L2) can be derived from equation (2) below.

Equation (2)

L2 = -7.90133 + 14.3516 * d - 1.34369 * d ^ 2

(Where d refers to a Stand off distance between the nozzle and the steel plate)

The front nozzle 112, the nozzle 112 of the type in which the concave inlet above the base frame 115 (e.g., 0.3 mm concave) ink head 111 in the case, in order to proceed with printing under uniform flow field of the need to ensure the minimum developed flow distance (L3) at least the distance and the least developed flow distance (L3) may be derived from the equation (3) below.

[Equation 3]

L3 = -3.27115 + 8.8348 * d - 0.74598 * d ^ 2

(Where d refers to a Stand off distance between the nozzle and the steel plate)

On the other hand, it may be applied to at least developed flow distance (L2, L3) of the ink head 111 which is located on the rear print head 111 which is located in the front is derived from Equation 2 and Equation 3, and the front and both It can be applied to the lateral.

Figure 23 is a photograph showing the print quality in accordance with the traveling speed of the steel sheet.

Referring to FIG 23, in the case of printing under the same conditions of height 5 mm, the printing speed of 10 mpm in the width direction of the steel sheet 31.67 degree angle as an ink droplet when the enemy is largely in the width direction heutnalrim phenomenon. However, when printing speed is increased to 50 mpm and the width direction of the steel sheet width direction of ink droplets is also 6.73 heutnalrim generated by the angle. The print height 5 mm was set as a condition where the maximum ink droplets heutnalrim.

And printing speed is faster while at 10 mpm to 50 mpm ink droplets traveling direction heutnalrim enemy was increased from 120 mm to more than 150 mm.

Thus, the more higher the print height increases print speeds reason why the width direction of the ink droplet heutnalrim largely occurs because receive a lot of impact on the surrounding air flow during ink droplet falling on a steel plate.

Previously it has been described that it is possible to use the base frame 115 to secure the flow development distance. In order for the concrete to a uniform flow field from the nozzle jetting zone (Jetting zone), a space between (112) and the steel sheet developed print area (A, printing zone, Printing zone) should be ensured that the distance required for the development flow around. The flow development distance can vary depending on the print height and print speed.

24 is a graph showing the minimum distance according to the developed flow rate of progression of the steel sheet.

24 is a, x axis represents the printing speed to be obtained through the flow analysis, y axis represents the least developed flow distance.

Printing conditions were the same height as the ink jet printing rate, resolution of 600 dpi of 20 Khz, the printing speed was different in the steel sheet speed of 10 mpm, 30 mpm, 50 mpm.

Referring to the graph, the nozzle 112 is in this case that enter the inner side of the base frame 115 (210), the minimum flow development distance required for 211 if it is 0.3 mm protruding below the base frame 115 is varies, when 0.3 mm recessed portion 210 shows a shorter distance minimum flow development.

However, there is a real difficulty is to design held to the inside than the nozzle 112, the base frame 115 as described above.

On the other hand, in the inlet portion 212 of the base frame 115, the longest distance flow development is needed because of the import of the outer flow field sucked between the steel sheet and the base frame 115. The result can be calculated from the minimum distance to the first print head 111 position from the entrance portion of the base frame 115 in accordance with the printing speed.

See the next 25 to 28 will be to look at the problem of the printing unit 110-2 according to the third embodiment.

Figure 25 is a side cross-sectional view illustrating, on an enlarged scale, the coupled state of the print head 111.

Printing unit As mentioned earlier, 110-2 is used in the coupling plate 150 to hold the print head 111 is accommodated in the first opening (115a) of the base frame 115.

Usually the nozzle 112 of the ink head 111 is provided so as to project more than the ink head 111. Since nozzle 112 can be difficult to clean if it has the same level as the print head 111 or in its neighborhood, is employed a structure in which the nozzle 112 is projected.

And provided around the nozzle 112, it is preferable that there is no portion protruding to below the nozzle 112. Distance between the steel sheet and the nozzle (112) is the spacing between 0.8 mm to 1.2 mm range, and when only considering the wave plate of the steel plate and the nozzle 112 may be smaller than the above range. If the portion protruding below the nozzle 112 around the nozzle 112, there is because damage to the steel sheet.

The height of the bottom surface of the base frame 115 can be positioned between the ink head 111 and the nozzle 112. For example, the nozzle 112 may be adapted to be approximately 0.3 mm than the projecting base frame (115).

And the bottom surface of the engaging plate 150 is provided is concave than the base frame 115. That is, between the ink head 111 and the base frame 115 is formed with a concave space.

On the other hand, in order to accurately position the ink droplets land on the target must be a uniform flow field formed in a printing area (A). A uniform flow can take place under a uniform surface. Therefore, if the irregularities around the print head 111 or the nozzle 112, it is difficult to a uniform flow field development.

The ink head 111 may be installed overlapping dog plurality in the transverse direction of the steel sheet. At this time there is a flow may occur under the influence of the space between the adjacent ink head 111. It is also possible to cause a non-uniform flow due to the spaces between adjacent nozzles (112) for projecting from the print head 111. Thus, when the step difference is formed around the nozzle 112 and can have implications for the career ink droplets by the flow generated in the width direction.

26 is an illustration showing a flow of the printing unit 110-2 according to the third embodiment.

26 shows the results of the flow analysis for the widthwise flow analysis. Analysis to generate a gap of 33% increased compared to the flow rate in the longitudinal direction between the height deviation is severe two nozzles (112-1, 112-2) based on 25 ° shifted road longitudinal direction of the flow field is not uniform within the print area formed It can be found. This non-uniform flow field is expected to have an adverse effect on the image when the rear end print image quality deterioration and a continuous image of a printing plate.

Specifically, it can be seen that the air flow generated in the both side portions of the two nozzles (112-1, 112-2). This is because it acts as a resistance to the air current flowing in the traveling direction of the steel plate is a nozzle (112) protrudes beyond the end of the print head 111.

Further, it is possible that the direction of air flow occurs in a diagonal in the space between the two nozzles (112-1, 112-2) adjacent to see that the air flow speed necessary. When the specific area only in a flow rate of the faster or the direction of air flow is shifted to the direction of movement of the steel sheet may be an error in the arrival point ink droplets generated have a negative impact on the quality of the printing.

27 is a photograph showing the print quality in accordance with the height of the step.

27 is a printing area (A) in height direction of the deviation around the nozzle (112) blowing an ink droplet when printed at a constant speed under a constant interval between the steel sheet and the nozzle 112 in order to determine the effect on the image quality in the a photograph at a test level.

Test results were born width is unclear shape shown in the direction of the image inside the image edge portion to flow occurs can be confirmed that the occurrence of ink Blowout phenomenon ssolrin in one rear end image.

28 is a graph showing the ink side speed in accordance with the traveling speed of the steel sheet.

28 is to be obtained through the flow analysis, the width-direction distance of the x-axis represents the steel sheet shows a y-axis direction width of the flow rate. And 0.00 on the x-axis is the point at which they cross the two nozzles (112-1, 112-2), -0.10 is the outer edge of the nozzle (112-2) which is located at the rear, it is 0.10 nozzles (112 positioned at the front It indicates the outer edge of -1).

Referring to the graph, when the two nozzle fast widthwise flow of 0.1 m / s at the point about which the crossing (112-1, 112-2). And in the crossing points with each other it can be seen that the flow is split into different width direction. And the width direction noodles of about 0.05 m / s when in the outer edge of the nozzle 112.

In order to prevent the image quality degradation due to heutnalrim ink droplet when the printing speed is varied to find the cause of the widthwise heutnalrim occur.

Printing unit 110-2 according to a third embodiment of the present invention is more widen the width of the steel sheet must be arranged a plurality of print heads (111-1, 111-2) in a zigzag pattern, located at the front of the system structure Flow of the ink head 111-1 with a space, such as a hollow goljagi where the print head 111-2 meets positioned at the rear and causing non-travel direction of the longitudinal direction of the steel sheet through the space width direction this will occur.

Further, it becomes strong in the flow generated in the width direction between the nozzles (112-1, 112-2) that is continuous in the width direction.

In particular, the ink head 111-2 is the ink head positioned at the front with a non-uniform flow generated in the arrangement, since the rear than the ink head 111-1 which is located at the front position to the rear in the traveling direction of the steel strip to the effects of non-uniform flow generated from (111-1) it will continue to print more in bad condition due to receive in combination.

Therefore, it should prevent an open area which leads to non-uniform flow in the widthwise direction of the connecting portion between the nozzle (112-1, 112-2).

29 is a perspective view showing a state that installation of the first auxiliary plate (152).

A first auxiliary plate 152 so as to give an even flow field around the installed nozzle 112 to wrap around the nozzle 112 in the width direction of development.

A first auxiliary plate 152 may be provided so as to fill a space between the nozzle 112 and the print head 111. For example, the thickness of the first auxiliary plate 152 may be a thickness corresponding to the step between the nozzles 112 and the ink head 111. When installing a first auxiliary plate 152 to the printing unit 110-2 is stepped is removed between the nozzle 112 and the ink head 111 may be the width direction of non-uniform flow to remove substantially.

30 is a graph showing the ink side speed in accordance with the traveling speed of the steel sheet after installing the first secondary plate (152).

30 is to be obtained through the flow analysis, the width-direction distance of the x-axis represents the steel sheet shows a y-axis direction width of the flow rate. And 0.00 on the x-axis is the point at which they cross the two nozzles (112-1, 112-2), -0.10 is the outer edge of the nozzle (112-2) which is located at the rear, it is 0.10 nozzles (112 positioned at the front It indicates the outer edge of -1).

Referring to the graph, the first by providing the auxiliary plate 152, it can be seen that the width of the flow direction at the point of intersection of the two nozzles (112-1, 112-2) removed. And it can be seen that the two nozzles (112-1, 112-2), the width direction of the flow to the outer edge of the nozzle from the intersection 112 is almost non-existent.

In addition it can be seen that the difference in width direction flow rate of the printing speed increases not larger. In other words, it can be seen quickly and also no significant impact on the quality of the print speed to improve productivity.

31 is a perspective view showing a state that installation of the second auxiliary plate 153.

Printing unit 110-3 according to a fourth embodiment of the present invention may further includes a second auxiliary plate 153 in order to remove the difference in level of the ink around the head 111.

The second auxiliary plate 153 may be provided so as to fill a space between the first opening (115a) of the ink head 111 and the base frame 115. For example, the thickness of the auxiliary plate 153 may be a thickness corresponding to the step between the coupling plate 150 and the base frame 115.

When the second installing a second plate 153 to the printing unit (110-3) is removed the step height between the base frame 115 and print head 111 can be a non-uniform flow to remove substantially. However, when the ink between the head 111 and the base frame 115 with a step, there may be a slight level difference between the second auxiliary plate 153 and the ink head 111 is formed.

On the other hand, unlike the drawing the thickness of the second auxiliary plate 153 it may be a thickness corresponding to the step between the engaging plate 150 and the print head 111. If the end of the ink head 111 is depressed than the bottom surface of the base frame 115, the second when installing a second plate 153, the step is eliminated between the ink head 111 and the second sub-plate 153 the non-uniform flow can be eliminated substantially. However, it is possible to be a slight level difference between the auxiliary plate 153 and the base frame 115 is formed.

On the other hand, the second step between the auxiliary plate 153 is a plate having a thickness corresponding to the step between the engaging plate 150 and the print head 111, print head 111 and the base frame 115, unlike the drawings separated by a plate having a thickness corresponding to may be provided. And both plates can be decomposed and combined.

Figure 32 is a perspective view showing a state that installation of the first and second auxiliary plates 152 and 153, Figure 33 is a side cross-sectional view of FIG.

In addition, the printing unit (110-4) according to the fifth embodiment of the present invention is to eliminate the step of surrounding the first auxiliary plate 152 and the print head 111 to remove the difference in level of the surrounding nozzle 112 the may further include an auxiliary plate 153.

When the first auxiliary plate 152 and the second auxiliary plate 153 have been installed, it can be a step to remove all around the nozzle 112. The That is, there is between the base frame 115 and the nozzle 112 can be filled in the same plane. Therefore removed all the non-uniform flow and, to a uniform flow development around the nozzle 112 can be improved print quality.

The present invention has been described for the embodiment shown in the accompanying drawings with reference to which to understand that it is only, and those skilled in the art from which the various modifications and equivalent other embodiments can be as illustrative It will be. Therefore, the true scope of the invention as defined only by the appended claims.

Reference Numerals

10: Tension Control Device, 11, 12: the tension roll debris,

13: tension measuring sensor, 14: tension control system,

20: meandering control unit, 21, 22: steering roll,

23: Sa measuring sensor, 24: control system Sa,

30, 40: speed control device, 31, 41: pinch rolls,

51.52: deflector roll, 53: Dancer roll,

60: the steel strip traveling direction control device, 61: driving roll,

62: move a roll, 71: a front structure,

72: rear structure, 73: printing structure,

100: the printing apparatus, 110: printing unit;

111: ink head, 112: nozzle,

113: curing device, 114: ink supply,

115: base frame, 116: dummy ink head,

117: dummy curing apparatus, 120: contact transfer unit,

131, 132: steel support roll, 133: conveyor belts,

134: vacuum chamber 135: pump,

136, 137: steel pressure roll, 138: expansion chamber,

139: pump, 140: wave height adjusting unit,

141, 142: digging control roll, 143: wave height measuring sensor,

150: coupling plate 151: first auxiliary plate,

152: second auxiliary plate.

Claims (24)

  1. A printing apparatus for printing by an ink-jet printing on the surface of the steel sheet, and
    The printing apparatus,
    And a plurality of print heads arranged in the direction of movement of the steel sheet in the printing area,
    The rear is disposed (the direction of movement of the steel sheet) of the coated steel sheet manufacturing apparatus including a plurality of curing devices for curing the enemy away from the ink liquid in the steel sheet of each of the ink head.
  2. According to claim 1,
    The printing apparatus includes a base which has a second opening for, but bound to the plurality of print head and wherein the plurality of the curing apparatus as a unit, exposure to irradiation section of the first aperture and the curing device for exposing the nozzle of the ink head to form apparatus for manufacturing a coated steel sheet further includes a frame.
  3. 3. The method of claim 2,
    The base frame of the apparatus for manufacturing coated steel sheet provided so as to extend in the front, rear, and sides of the both sides of the print head, preventing the non-uniformity occurs yudongil around the ink head.
  4. According to claim 1,
    The printing apparatus is apparatus for manufacturing a coated steel sheet further comprises a dummy ink head disposed in front of the ink head positioned in the forward (going in the opposite direction of the steel plate) of the plurality of ink heads.
  5. 5. The method of claim 4,
    Producing device of the dummy head and the ink-coated steel sheet further comprises a dummy curing device is arranged between the print heads to the best position in the forward direction.
  6. 5. The method of claim 4,
    It said plurality of said plurality of heads and the ink curing device are arranged to each other at regular intervals,
    It said dummy print head apparatus for manufacturing a coated steel sheet that is disposed in front of the ink head positioned at the most forward at the same interval as the interval between the plurality of print heads.
  7. 5. The method of claim 4,
    Under the printing area of ​​the printing apparatus further comprises a contact transfer unit for supporting the plate,
    The contact transfer unit,
    But supporting the steel sheet producing apparatus of the coated steel sheet comprising a supporting member which includes a convex curved surface upward.
  8. The method of claim 7,
    And the conveyor belt and the supporting part is provided to allow for shape variations, the rotational movement in an endless orbit,
    That the conveyor belt located under the region for supporting the steel plate, and includes an expansion chamber capable of providing air pressure through a hole or a slit,
    Apparatus for manufacturing a by the air pressure provided by the expansion chambers coated steel sheet in which the conveyor belt holding the curved surface.
  9. The method of claim 8,
    The steel sheet production apparatus of the coated steel sheet is provided so as to have a curvature, such as the curved surface of the conveyor belt in close contact with the conveyor belt.
  10. 10. The method of claim 9,
    Producing system of the respective distance equal to prepare coated steel sheet between the ink head and the steel sheet.
  11. 11. The method of claim 10,
    Producing apparatus of each of the coated steel sheet is maintained in the range of 0.8 mm to 1.2 mm distance between the print head and the steel sheet.
  12. According to claim 1,
    But constraining the plurality of print heads as a unit, further comprising a base frame to which the first opening for exposing the nozzle of the ink head is formed,
    The base frame has a front (direction in which the steel sheet approach) and the coating apparatus for manufacturing a steel sheet extending on both sides of the print head.
  13. 13. The method of claim 12,
    The base frame is formed with a third opening for receiving the ink head,
    Apparatus for manufacturing a coated steel sheet further comprising a coupling plate to secure the ink head in the third opening.
  14. 13. The method of claim 12,
    The base frame of the apparatus for manufacturing coated steel sheet provided so as to extend in the front, rear, and sides of the both sides of the print head, preventing the non-uniformity occurs yudongil around the ink head.
  15. 13. The method of claim 12,
    The print head apparatus for manufacturing a coated steel sheet that is doedoe plurality dog ​​arranged in parallel in the width direction of the steel sheet, arranged such that some overlap in the longitudinal direction of the steel sheet.
  16. 16. The method of claim 15,
    Apparatus for manufacturing a coated steel sheet further including a first auxiliary plate of the print head is arranged such that the overlap, installed so as to fill a space between the print head and the print head which is located in the rear position to the front.
  17. 14. The method of claim 13,
    The coupling plate is arranged to be depressed from the base frame,
    Apparatus for manufacturing a coated steel sheet further comprising a second auxiliary plate which is installed so as to fill a space between the print head and the base frame.
  18. 14. The method of claim 13,
    Production apparatus of the ink head and the back fill a space between the base frame, the coating further comprises an auxiliary plate which is installed does not protrude more than the ink head plate.
  19. 13. The method of claim 12,
    Print head has apparatus for manufacturing a coated steel sheet that is disposed away from at least developed flow distance (L1) that is derived from the equation below, from the front end of the base frame which is located in the front of the plurality of ink heads.
    L1 = 9.25461 - 10.14318 * d + 11.49179 * d ^ 2 - 1.48561 * d ^ 3
    (Where d is the distance between the print head and the steel plate)
  20. 13. The method of claim 12,
    The print head is arranged so as to project below the said base frame,
    The base frame of the apparatus for manufacturing coated steel sheet extending at least developed flow distance (L2) over which is derived from the equation below to the front of the ink head.
    L2 = -7.90133 + 14.3516 * d - 1.34369 * d ^ 2
    (Where d is the distance between the print head and the steel plate)
  21. 13. The method of claim 12,
    The print head is adapted to be depressed up than the base frame,
    The base frame of the apparatus for manufacturing coated steel sheet extending at least developed flow distance (L3) above is derived from the equation below to the front of the ink head.
    L3 = -3.27115 + 8.8348 * d - 0.74598 * d ^ 2
    (Where d is the distance between the print head and the steel plate)
  22. 13. The method of claim 12,
    Producing apparatus of each of the coated steel sheet is maintained in the range of 0.8 mm to 1.2 mm distance between the print head and the steel sheet.
  23. A printing apparatus for printing by an ink-jet printing on the surface of the steel sheet, and
    The printing apparatus,
    Are arranged in the direction of movement of the steel sheet onto the print area, the plurality of print head comprising a plurality of print heads arranged in the width direction of the steel plate heat,
    But bind the plurality of print heads arranged in the width direction of the steel sheet as a unit, comprising a base frame to which the first opening for exposing parts of the nozzles of the ink head is formed,
    The base frame extends to the front side (direction in which the steel sheet access) and on each side of the ink head,
    The nozzles of the ink head section protruding down from the end,
    Apparatus for manufacturing a coated steel sheet that includes a first auxiliary plate is provided at an end of the print head, so as to fill the space around the nozzle portion.
  24. 24. The method of claim 23,
    Apparatus for manufacturing a coated steel sheet further comprising a second auxiliary plate being fill a space between the base frame and the print head, the installation does not protrude below the nozzle unit.
PCT/KR2016/012602 2015-11-03 2016-11-03 Coated steel sheet manufacturing apparatus using inkjet printing WO2017078433A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR20150153841 2015-11-03
KR10-2015-0153841 2015-11-03
KR20160105305A KR20180021321A (en) 2016-08-19 2016-08-19 Apparatus of coating steel sheet using inkjet printing
KR10-2016-0105305 2016-08-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201680064072 CN108349243A (en) 2015-11-03 2016-11-03 By inkjet printing apparatus for producing a coated steel sheet

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001232786A (en) * 2000-01-07 2001-08-28 Hewlett Packard Co <Hp> Method for moving and supporting print medium
KR100926517B1 (en) * 2009-02-06 2009-11-12 주식회사 씨.아이.제이코리아 Printer for steel plate
JP2012045908A (en) * 2010-08-30 2012-03-08 Seiko Epson Corp Image forming apparatus, and image forming method
JP2013111844A (en) * 2011-11-29 2013-06-10 Seiko Epson Corp Apparatus for jetting liquid
US8485637B2 (en) * 2011-01-27 2013-07-16 Eastman Kodak Company Carriage with capping surface for inkjet printhead
JP2013147038A (en) * 2013-05-02 2013-08-01 Konica Minolta Inc Ink jet recorder
JP2014162229A (en) * 2013-10-21 2014-09-08 Seiko Epson Corp Liquid ejection apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001232786A (en) * 2000-01-07 2001-08-28 Hewlett Packard Co <Hp> Method for moving and supporting print medium
KR100926517B1 (en) * 2009-02-06 2009-11-12 주식회사 씨.아이.제이코리아 Printer for steel plate
JP2012045908A (en) * 2010-08-30 2012-03-08 Seiko Epson Corp Image forming apparatus, and image forming method
US8485637B2 (en) * 2011-01-27 2013-07-16 Eastman Kodak Company Carriage with capping surface for inkjet printhead
JP2013111844A (en) * 2011-11-29 2013-06-10 Seiko Epson Corp Apparatus for jetting liquid
JP2013147038A (en) * 2013-05-02 2013-08-01 Konica Minolta Inc Ink jet recorder
JP2014162229A (en) * 2013-10-21 2014-09-08 Seiko Epson Corp Liquid ejection apparatus

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