KR20140135606A - Ink jet apparatus and head layout method for ink jet apparatus - Google Patents

Abstract

An ink jet recording apparatus (12) is to coat droplets discharged from a nozzle on a printing target moving on a main scan direction perpendicular to a sub-scan direction. Nozzles provided on one end of the nozzle rows placed in correspondence to a module head (621) arranged most closely to a second line head (100) among a plurality of modules arranged in a first line head (99) and a module head (622) arranged most closely to the first line head (99) among the module heads arranged in the second line head (100), are offset from each other such that the nozzles are not provided on a line parallel to the sub-scan direction. Accordingly, the distance between the adjacent line heads can be increased without changing the printing pitch, and the interference between the line heads can be reduced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet apparatus and an ink jet apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jetting apparatus and a head positioning method of an ink jetting apparatus.

BACKGROUND ART [0002] Recently, a method of manufacturing a device using an ink jet apparatus has been attracting attention. The ink jet apparatus has a plurality of nozzles for performing droplet ejection (droplet ejection), and applies droplets to a printing object by ejecting droplets from the nozzles while controlling the positional relationship between the nozzles and the printing object.

One of such ink jet apparatus is provided with a plurality of module heads (a liquid drop ejecting head having a plurality of ejection openings) juxtaposed in the width direction of a printing object called a line head. Fig. 7 shows a schematic diagram of the line head 98. Fig. As shown in Fig. 7, the line head 98 is composed of a plurality of module heads 620 and a frame 121 for supporting the same. Since the line head has a long length extending along the width direction of the printing object, it is difficult to manufacture the line head integrally, but the line head having a long length can be obtained by joining the module head with the small area in the width direction of the printing object.

In addition, a line head equipped with a module head in which arrangement of nozzles is improved in order to realize printing with high precision and high accuracy is known (see, for example, Japanese Patent Application Laid-Open No. 2002-273878 of Patent Document 1). 8 is a schematic view showing the arrangement of the nozzles 600 of the module head 620 constituting the conventional line head described in Patent Document 1. [

8A, the longitudinal direction of the module head 620 is inclined by an angle? With respect to a direction perpendicular to the printing direction (hereinafter referred to as the main scanning direction) (hereinafter referred to as the sub-scanning direction). By tilting the module head 620, the print pitch of the printed dots can be narrowed. The printed dot indicates the arrangement of droplets landed on the printing object, and the printing pitch indicates the distance between printed dots in the sub scanning direction.

In addition, Patent Document 1 also discloses that the module head 620 is provided with two columns of parallel rows of nozzles 600 as shown in Fig. 8 (b). According to this method, the printing pitch can be narrowed to realize printing with a fixed number of lines.

When the width of the printing object is wide, a plurality of the line heads are arranged in the sub-scanning direction (the width direction of the printing object) so that the module head can be replaced or maintained for each line head, It is conceivable to construct a drawing line having a wide width without deteriorating the exchangeability of the head and the water retention property. At that time, if the line heads are not mounted with high precision, there is an error in the relative position between the plurality of line heads, so that a landing error is generated. In order to solve the problem that the mounted line head is mounted on the recognition result of the landing error discharged from the line head And a step of correcting the discharge pattern data in the main scanning direction based on the recognition result of the landing error is known as a method of correcting the relative position of each line head in the sub-scanning direction and the &thetas; (See, for example, Japanese Patent No. 4765278 of Patent Document 2).

However, in the case where the line heads (refer to reference numerals 99 and 100 in Fig. 9) of the above-described conventional arrangement are arranged in the sub-scanning direction, the closer the print pitches (see reference symbol P in Fig. 9) 9, reference symbol D) is made to be smoother. Since the line head is composed of a plurality of module heads and a frame supporting it, it becomes heavy, and it requires high function and experience in order to precisely execute the operation of adjusting the minute distance between the line heads. That is, there arises a problem that the risk of interfering with each other between the line heads at the time of mounting the line head or adjusting the sub-scan direction and the &thetas; axis is increased. When the line heads interfere with each other, the position of the module head (refer to 620a and 620b in Fig. 9) mounted on the line head is shifted and the accuracy of landing of the droplet drops. Further, in order to repair the mounting position of the module head, it is necessary to separate the line head from the ink jetting apparatus to re-align the module head and then mount the line head on the ink jet apparatus. Is required.

Fig. 9 shows a line head when the first line head 99 and the second line head 100 of the conventional configuration are arranged in the width direction of the printing object, and a module head 620a and 620b, respectively. The X-axis direction indicates the main scanning direction, and the Y-axis direction indicates the sub-scanning direction.

The nozzle pitch of the nozzles 600 is p and the printing pitch of the printing dots 110 in the sub scanning direction is P (= 0), the slope of the module heads 620a and 620b from the sub- the distance d between the module heads 620a and 620b and the distance d between the module heads 620a and 620b in the nozzle row of the first line head 99 are denoted by K, The distance from the cross section of the module head 620b to the cross section of the module head 620b in the sub scan direction is represented by i and the distance from the cross section of the module head 620b in the sub scan direction is defined as i The distance d between the module heads 620a and 620b and the distance d between the first line head 99 and the second line head 100 are set to be D when the distance between the first line head 99 and the second line head 100 is D, The distance D satisfies the following relational expression.

For example, the slope of the module heads 620a and 620b with respect to the sub-scan axis is 63 deg, the print pitch P = 80 [mu] m, the number n of the droplet discharge nozzles is 150, The distance d between the module heads 620a and 620b becomes 0.7 [mm] by the equation (1) when the direction dimension K = 10 [mm].

When the distance i from the cross section of the line head in the sub-scan direction to the cross section of the module head in the sub-scan direction is 0.1 [mm], the distance D between the line heads becomes 0.5 [mm] It can be seen that there is a large risk that the line heads interfere with each other in mounting or adjusting the sub-scanning direction and the? Axis.

The inclination? Of the module heads 620a and 620b from the sub-scanning axis, the dimension K in the short direction of the module heads 620a and 620b and the dimension K of the module heads 620a and 620b in the equations (1) The distance i to the cross section in the scanning direction is a design requirement. Accordingly, in order to widen the distance D between the line heads without changing the design requirements and the print pitch P, the number n of the nozzles 600 is increased or the inclination? Of the module heads 620a and 620b with respect to the sub- It can be seen that only the method of approaching to the center is effective.

However, when the module heads 620a and 620b are elongated in the longitudinal direction to increase the number n of the nozzles 600, the influence of thermal expansion increases in the manufacturing process of the module heads 620a and 620b, and the deviation in the manufacturing process becomes large. Therefore, problems arise such that the amount of ejection becomes uneven, the ejection does not occur, or the droplet can not be printed at a desired position. In order to bring the inclination? Of the module heads 620a and 620b closer to 90 degrees in the sub-scan direction without changing the print pitch P, it is necessary to widen the nozzle pitch. Therefore, the number n of the nozzles 600 also increases The influence of the thermal expansion increases in the manufacturing process of the module heads 620a and 620b, and the deviation in the manufacturing process becomes large. That is, when the line heads of the conventional configuration as shown in FIG. 9 are arranged in the width direction of the printing object, the distance D between the line heads is restricted by the printing pitch P and the distance becomes small, There is a great risk of interference.

Similarly, even when the number of nozzle rows of the module heads 620a and 620b is plural, the distance D between the line heads is similarly restricted by the print pitch P, and since the distance is small, there is a large risk that the line heads interfere with each other.

An object of the present invention is to provide an ink jet apparatus capable of increasing the distance between line heads without changing the printing pitch and a method of arranging the heads of the ink jet apparatus.

In order to achieve the above object, the first aspect of the present invention is an ink jet apparatus for applying a droplet to a printing object by using a liquid drop ejecting head for ejecting liquid droplets, wherein the module head having nozzle arrays in which the nozzles are arranged at the same pitch A plurality of first line heads and a plurality of second line heads arranged parallel to the sub-scan direction so that the nozzle rows have a slope of a certain angle from a sub-scan direction axis parallel to the width direction of the printing object, Wherein the direction in which the second line head is arranged with respect to the first line head is defined as the defining direction in the sub scanning direction and the sub scanning direction coordinates When the direction of the component in the main scanning direction perpendicular to the sub-scanning direction of the vector directed to the small nozzle is set to the positive direction of the main scanning direction, The nozzle having the smallest sub-scan direction coordinate among the nozzles of the module head arranged closest to the second line head among the module heads arranged in the first line head has a main scan direction coordinate A, When the coordinate in the main scanning direction of the nozzle having the smallest sub-scanning direction coordinate is B, among the nozzles of the module head disposed closest to the first line head among the module heads arranged in the second line head, And the liquid droplet ejection head is disposed so as to be smaller than the B value.

According to this configuration, since the positional relationship of the nozzles in the sub-scan direction is not changed, the distance between the first line head and the second line head can be made larger than the conventional one without changing the print pitch.

The second aspect of the present invention is characterized in that among the nozzles of the module head disposed at a position away from the second line head at most among the module heads disposed in the first line head, And the droplet ejection head is arranged so that A is smaller than the C when the scanning direction coordinate is C,

In the third invention, the first line head and the second line head have the same configuration, and the position of the head end face in the main scanning direction parallel to the sub-scanning direction axis of each line head is the same And the ink jet device according to the first aspect of the present invention.

The fourth aspect of the present invention further includes a third line head, wherein the arrangement relationship between the second line head and the third line head is the same as the arrangement relationship between the first line head and the second line head Jetting apparatus according to any one of the first to third aspects of the present invention.

The fifth invention is characterized in that the droplet ejection head is arranged such that the difference between A and B is equal to an integer multiple of the distance in the main scanning direction between the nozzles forming the printing dot adjacent to the sub scanning direction The ink jet apparatus according to any one of the first to third aspects of the present invention.

The sixth invention is characterized in that the droplet ejection head is arranged such that the difference between A and B is equal to an integer multiple of the distance in the main scanning direction between the nozzles forming the printing dots in the sub scanning direction The inkjet apparatus of the fourth invention of the present invention.

The seventh invention is characterized in that the droplet ejection head is arranged so that the difference between A and C is an integer multiple of the distance in the main scanning direction between the nozzles forming the printing dots in the sub scanning direction The ink jet apparatus of the second invention.

According to the eighth aspect of the present invention, there is provided a module head having a single or a plurality of nozzle arrays in which nozzles are arranged at the same pitch, wherein a slope of a certain angle with respect to the sub-scanning direction in which the nozzle row is parallel to the width direction of the printing object A plurality of line heads arranged in parallel with each other in parallel with the sub-scanning direction so as to be parallel to each other in the sub-scanning direction so that the printing pitch becomes the same, Of the plurality of line heads arranged in one line head in adjacent line heads included in the line head group, the ink jet apparatus comprising: The module head disposed at a position closest to the line head of the other line head and the plurality Each of the nozzles located at one end of the nozzle row at a position corresponding to each of the module heads disposed at a position closest to the line head of the one of the module heads of the module head is shifted so as not to be on the same line parallel to the sub- Wherein the ink jet device is an ink jet device.

According to a ninth aspect of the present invention, the module head has one or more rows of nozzle arrays, and the nozzles located at one end of the row of nozzles in each module head of the plurality of module heads arranged in the line head Are arranged on the same line parallel to the sub-scanning direction, respectively, in the ink jet apparatus according to the eighth aspect of the present invention.

The tenth invention is characterized in that the module head has one or more rows of the nozzles and the nozzles located at the one end of the row of nozzles in each module head of the plurality of module heads arranged in the line head Scanning direction and are not on the same line parallel to the sub-scanning direction, respectively.

In the eleventh aspect of the present invention, a module head having a single or a plurality of nozzle arrays in which nozzles are arranged at the same pitch has a slope of a certain angle with respect to a sub-scanning direction in which the nozzle row is parallel to the width direction of the printing object A plurality of line heads arranged in parallel with each other in parallel with the sub-scanning direction so as to be parallel to each other in the sub-scanning direction so that the printing pitch becomes the same, And a plurality of line heads arranged in one line head in adjacent line heads included in the line head group, wherein the plurality of line heads are arranged in a line head The module head disposed at a position closest to the other line head of the module head and the other line head Wherein each of the plurality of module heads disposed at one end of the nozzle array at a position corresponding to each of the module heads disposed at a position closest to the one line head is arranged to be parallel to the sub- And the ink jet head is arranged so as not to be on a line.

According to the above configuration, since the positional relationship of the nozzles in the sub-scan direction is not changed, the distance between one line head and the other line head can be made larger than the conventional one without changing the print pitch.

As described above, according to the ink jet apparatus and the head arrangement method of the ink jet apparatus of the present invention, the distance between adjacent line heads can be increased without changing the printing pitch, and the risk that the line heads interfere with each other can be reduced have.

1 is a schematic perspective view of an ink jet recording apparatus according to Embodiment 1 of the present invention,
2 is a schematic view of a line head arranged by the method shown in the first embodiment and a module head arranged at the end of the line head,
3 is a schematic view of a line head in which the position of the module head according to the first embodiment is shifted in the main scanning direction and a module head mounted on the line head,
4 is a schematic view of another example of a line head in which the position of the module head according to the first embodiment is shifted in the main scanning direction and a module head mounted on the line head,
5 is a schematic view of a line head arranged so that the position of the module head according to Embodiment 1 in the main scanning direction becomes the same, and a module head mounted on the line head,
6 is a schematic view of another example of a line head mounted on the line head and a module head mounted on the line head so that the position of the module head according to the first embodiment is the same,
7 is a perspective view schematically showing the structure of the line head,
8 (a) and 8 (b) are views showing the nozzle arrangement and the arrangement of the module head in the conventional module head disclosed in Patent Document 1,
FIG. 9 is a schematic view of a line head arranged by a conventional method and a module head arranged at an end of a line head.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)

Here, the configuration and operation of the ink jet recording apparatus, which is one embodiment of the ink jet apparatus of the present invention, will be described with reference to Fig.

1 is a schematic perspective view of an ink jet recording apparatus 12 according to the first embodiment.

As shown in Fig. 1, the printing object 1 is provided on a table 3 located vertically downwardly of the head unit 2. As shown in Fig. The table 3 is provided on the stage 11 having a driving system and is transported in the main scanning direction (X-axis direction). The support portion 5 mounted on the upper side of the corner portion 4 is formed as a bridge 6 in the form of a girder with the corner portion 4 on the stage 11. A supporting table 7 having an elevating shaft in the elevating direction Z is formed so as to extend in the vertical direction of the bridge 6. A plurality of head units 2 are juxtaposed on a support table 7 and the head unit 2 is provided with a plurality of distribution tanks 8 and line heads 98.

The line head 98 has each module head 620 including a plurality of piezoelectric actuators (not shown) for ejecting ink. Each module head 620 is connected to the distribution tank 8 one by one by a plurality of supply tubes (not shown), thereby realizing simplification of the liquid supply system.

The line head 98 is composed of a first line head 99 and a second line head 100, which will be described later.

The configuration including the first line head 99 and the second line head 100 of the present embodiment corresponds to an example of the line head group of the present invention.

In addition, the head unit 2 is shown in a smaller number than the actual distribution tank 8 and the module head 620 in order to facilitate understanding.

Thus, the line head 98 is provided with the module head 620 arranged in the sub-scanning direction (Y-axis direction). Therefore, in the recording operation, a desired image is formed over the entire width of the printing object 1 by discharging droplets from the line head 98 at a predetermined timing while conveying the printing medium 1 in the main scanning direction It is possible.

The ink jet recording apparatus 12 is provided with a power / control box (not shown) as a control means. The power / control box supplies power and control signals to the respective module heads 620, and the power and control box supplies control signals to the respective drive shafts.

Next, the reason why the distance between the first line head 99 and the second line head 100 of the ink jet recording apparatus 12 of the first embodiment can be made larger than that of the prior art by using Fig. 2 In addition, one embodiment of the head arrangement method of the ink jet apparatus of the present invention will be described.

Fig. 2 is a schematic view of a line head and a module head disposed at an end of the line head when the head is arranged by the head arrangement method shown in this embodiment.

The nozzle pitch of the nozzles 600 is p and the printing pitch of the print dots 110 in the sub scanning direction is P ( the number of the nozzles 600 in the nozzle row is n and the number of the nozzles in the nozzle row in the nozzle row is n, The distance from the end face of the first line head 99 to the end face of the module head 621 in the sub scan direction is i and the distance from the end face of the module head 622 , And the distance between the first line head 99 and the second line head 100 is D '.

As shown in Fig. 2, the module head 621 disposed on the side closest to the second line head among the module heads disposed on the first line head 99 and the module head disposed on the second line head 100 The distance d 'between the module head 621 and the module head 622 and the distance between the first line head 99 and the module head 622 when the main scanning direction distance of the module head 622, The distance D 'of the second line head 100 satisfies the following relationship.

2, the module head 621 disposed on the side closest to the second line head 100 among the module heads disposed on the first line head 99 and the module head 621 disposed on the second line head 100, When the distance in the main scanning direction of the module head 622 disposed on the side nearest to the first line head 99 of the heads is shifted by h, the distance d (see FIG. 9) The distance between the line head 99 and the second line head 100 can be increased only by h · cos θ and the risk of interference between the first line head 99 and the second line head 100 can be reduced .

Even when a plurality of nozzle arrays are formed in the module head 621 and the module head 622, the number of the module heads arranged in the first line head 99 nearest to the second line head 621 disposed in the first line head 100 and the module head 622 disposed near the first line head 99 among the module heads arranged in the second line head 100 are disposed in the main scanning direction at a distance of h, The distance between the first line head 99 and the second line head 100 can be increased and the risk of interference between the first line head 99 and the second line head 100 can be reduced.

It should be noted that the first line head 99 of the present embodiment corresponds to one example of the line head of the present invention and the second line head 100 of the present embodiment corresponds to the example of the other line head of the present invention .

Next, an example of the arrangement of the module heads in the line head to which the head arrangement described in Fig. 2 is applied will be described with reference to Fig. 3, and one embodiment of the head arrangement method of the ink jet apparatus of the present invention will be described.

Fig. 3 schematically shows an example of the module head arranged in the line head and the line head in the first embodiment of the present invention. The components in Fig. 3 will be described.

The first line head 99 and the second line head 100 shown in Fig. 3 are arranged in parallel in the sub-scanning direction, and each of the line heads has a plurality of module heads 3, reference numerals 621 and 623).

The nozzle rows of each module head are arranged at the same pitch (nozzle pitch p). The number of nozzles per nozzle array is, for example, about 100 to 400, and in this example, the number of nozzles per nozzle array is 150. The number of nozzle rows of each module head may be one or more, but in this example, one nozzle row is required for each module head.

If the nozzle pitch is required to be more precise, the nozzle pitch may be finer, and if not, the nozzle pitch may be made finer. However, in practical use, the nozzle pitch is preferably 150 to 600 [mu m]. In the present embodiment, the nozzle pitch of each nozzle row is set to 189 [mu m]. The openings of the respective nozzles are 20 to 50 [mu m] in diameter.

Each module head is arranged parallel to the sub-scanning axis at a predetermined angle and inclined by a certain angle?. The inclination angle? Is preferably 45 [deg] or more from the viewpoint of design. On the other hand, if it is more than 80 [deg], the printed dots overlap, so that it is not possible to realize high-precision printing. In this example, the inclination angle? Is set to 63 [deg].

The dimension of the module head in the short direction is, for example, 5 to 20 [mm], and in the present embodiment, it is set to 10 [mm]. The dimension in the longitudinal direction of each module head is, for example, 40 to 150 [mm], and 50 [mm] in the present embodiment.

The number of module heads for one line head is, for example, 30 to 120, and in this embodiment, one line head is composed of 40 module heads.

It is preferable that the first line head 99 and the second line head 100 have a substantially parallelogram shape in plan view. The smaller the distance from the end face of the line head in the sub-scan direction to the end face in the sub-scan direction of the module head is, the better, but is 0.1 [mm] in this example.

In the following description, it is assumed that the arrow direction in the Y axis direction in Fig. 3 in the sub-scan direction, that is, the direction from the first line head 99 to the second line head 100 is the positive direction, The direction of the main scanning direction component of the vector from the nozzle with the smallest sub-scanning direction coordinate of the module head 621 to the small nozzle in the sub-scanning direction coordinate, for example, Direction.

3, among the nozzles of the module head 621 arranged closest to the second line head 100 among the module heads arranged in the first line head 99, the nozzle 600A having the smallest sub- (I.e., a value on the X-axis) of the module head 622 arranged near the first line head 99 of the module head arranged in the second line head 100 is A, The module head 621 and the module head 622 are arranged so that A becomes smaller than B when the coordinates of the nozzle 600B with the smallest coordinate are the main scanning direction coordinates (i.e., the value on the X axis)

According to this configuration, when the values of A and B are the same without changing the printing pitch, that is, in the conventional case where the nozzles corresponding to A and the nozzles corresponding to B are on the same line parallel to the sub-scanning direction The distance D between the first line head 99 and the second line head 100 can be made larger.

For example, if the module head 620 is arranged so that A is smaller than B by h, the distance D 'between the first line head 99 and the second line head 100 is equal to h . The value of the distance h between the nozzle 600A and the nozzle 600B is, for example, 1 to 50 [mm], and is set to 6.8 [mm] in the present embodiment.

It is preferable that the difference between the main scanning direction coordinates A and B (i.e., the distance h) is an integral multiple of the distance between the nozzles forming the printing dot adjacent to the sub-scanning direction in the main scanning direction.

According to this configuration, since it is easy to correct misalignment in the main scanning direction by the software for controlling the landing, it is possible to reduce the risk of complication of software and increase of other bugs.

Among the nozzles of the module head 623 (see FIG. 3) disposed at a position away from the second line head 100 among the module heads arranged in the first line head 99, the sub- When the coordinate of the nozzle 600C in the main scanning direction is C, it is preferable that the module head 623 is arranged such that C is larger than A.

It is preferable that the difference between the main scanning direction coordinates A and C is an integral multiple of the distance between the nozzles forming the printing dot adjacent to the sub scanning direction in the main scanning direction.

It is also preferable that C is matched with B.

According to this configuration, since it is easy to correct the difference in the main scanning direction by the software for controlling the landing, it is possible to reduce the risk of the complication of the software and the increase of the bugs.

As shown in Fig. 3, the arrangement of the module heads in the first line head 99 is not limited to that of the nozzle having the smallest sub-scan direction coordinate on each module head (for example, in the case of the module head 623 It is preferable to dispose the respective module heads such that the coordinates in the main scanning direction of the nozzles 600C and the nozzle head 600A in the case of the module head 621 are gradually decreased toward the second line head 100 side.

According to this configuration, the distance between the module heads can be made constant, and the process of mounting the module head on the line head can be simplified. In addition, the first line head 99 and the second line head 100 can be arranged in the same configuration, and manufacturing costs can be reduced by making the manufacturing process uniform. Since the center of each line head does not deviate from the center of the line head, it is possible to reduce the risk that the accuracy of landing accuracy is lowered due to unevenness in the amount of bending.

Further, instead of reducing the distance between the module heads in the line head, which is relatively easy to assemble or adjust, the distance D 'between the line heads, which is difficult to assemble or adjust, is increased. It becomes possible to shorten or improve the precision.

At this time, it is preferable that the difference in the main scanning direction coordinates of the nozzles having the smallest sub-scan direction coordinates of the adjacent module heads is an integer multiple of the distance in the main scan direction between the nozzles forming the print dots adjacent to the sub- .

According to this configuration, since it is easy to correct the difference in the main scanning direction by the software for controlling the landing, it is possible to reduce the risk of complication of the software and an increase in bugs therefrom.

In these cases, it is preferable that the end faces 99a and 100a parallel to the sub-scan axis in the first line head 99 and the second line head 100 are arranged on the same straight line.

According to this configuration, since the force applied to the bridge 6 supporting the line head is made uniform, it is possible to reduce the risk that the accuracy of landing is lowered due to irregularity in the amount of bending of the bridge 6.

4, the second line head 100 and the third line head 101 having the same relationship as the arrangement relationship of the first line head 99 and the second line head 100 are arranged Maybe. In this configuration, the cross sections 99a, 100a, and 101a parallel to the sub-scan axis in the first line head 99, the second line head 100, and the third line head 101 are arranged on the same straight line . 4, among the module heads disposed in the first line head 99, among the nozzles of the module head 623 disposed at a position away from the second line head 100, the sub-scan direction coordinates It is preferable that the coordinate in the main scanning direction of the smallest nozzle 600B is B

The number of line heads configured as described above may be changed depending on the size of the printing object, and may be four or more, although not shown.

According to this configuration, in addition to the same effect as the configuration of Fig. 3, even when the width of the printing object is wide, the size of each line head can be reduced, and the yield can be reduced and the manufacturing cost can be reduced.

The arrangement of the module head mounted on the line head and the arrangement of the first line head 99 and the second line head 100 may be the arrangement shown in Fig.

Hereinafter, the arrangement of the module head mounted on the line head and the arrangement of the first line head 99 'and the second line head 100' will be described with reference to FIG. 5, One embodiment of the arrangement method will also be described.

In FIG. 5, the positions of all the module heads 620 mounted on one line head are the same in the main scanning direction, and the first line head 99 'and the second line head 100' are the same.

The arrangement position of the first line head 99 'is shifted by h' in the negative direction in the main scanning direction from the arrangement of the second line head 100 '.

According to this configuration, when the first line head 99 'and the second line head 100' are located at the same position in the main scanning direction (see FIG. 9) The distance D 'between the first line head 100' and the second line head 100 'can be increased. For example, when the amount of deviation between the first line head 99 'and the second line head 100' in the main scanning direction is h ', the distance between the first line head 99' and the second line head 100 ' The distance D 'becomes larger by h' cos [theta] [mm] than when the positions of the first line head 99 'and the second line head 100' in the main scanning direction are the same. The value of the distance h 'is, for example, 1 to 50 [mm], and is set to 6.8 [mm] in the present embodiment.

According to this configuration, since the module head 620 mounted on each of the first line head 99 'and the second line head 100' has the same position in the main scanning direction, the module head is mounted on the line head The process can be simplified and the manufacturing process time can be shortened and the cost can be reduced.

The distance h 'in the main scanning direction between the first line head 99' and the second line head 100 'is preferably an integer multiple of the distance between the nozzles forming the printing dot adjacent in the sub-scanning direction Do.

According to this configuration, since it is easy to correct the difference in the main scanning direction by the software for controlling the landing, it is possible to reduce the risk of occurrence of problems such as software complexity and consequent increase in bugs.

6, the second line head 100 'and the third line head 101', which have the same relationship as the arrangement relationship of the first line head 99 'and the second line head 100' ') May be disposed.

The number of line heads configured as described above may be changed depending on the size of the printing object, and may be four or more, although not shown.

According to this configuration, even when the width of the printing object is wide, the size of each line head can be reduced, and the yield can be reduced and the manufacturing cost can be reduced.

According to the ink jet apparatus and the head arrangement method of the ink jet apparatus of the present invention, the distance between adjacent line heads can be increased without changing the printing pitch, for example, The risk of interference can be reduced.

Therefore, for example, it is possible to expect a reduction in process loss by restricting the risk of the deterioration of the landing accuracy and the positional deviation of the module head due to the positional deviation of the module head due to interference between line heads.

For this reason, it is useful for the use of a droplet discharge type recording apparatus for applying and forming an organic light emitting material in the production of, for example, an organic EL display panel.

1 Print object
2 head unit
3 tables
4-leg
5 Support
6 bridge
7 Support
8 Dispensing tank
11 stage
12 Inkjet recording device
98 line head
99 first line head
100 second line head
101 3rd line head
110 printing dots
600 nozzle
620 module head
621 module head
622 Module head
623 Module head
630 scan axis

Claims (11)

An ink jet apparatus for applying a liquid drop to a printing object using a liquid drop ejecting head for ejecting liquid drops,
A module head having nozzle arrays in which nozzles are arranged at the same pitch are arranged in parallel to the sub-scanning direction so that the nozzle arrays have a slope of a certain angle from a sub-scanning direction axis parallel to the width direction of the printing medium, A line head and a second line head are juxtaposed in the sub-scanning direction,
Wherein a direction in which the second line head is arranged with respect to the first line head is defined as a defining direction in the sub scanning direction and a sub scanning direction coordinate is small When the direction of the component in the main scanning direction perpendicular to the sub-scanning direction of the vector directed to the nozzle is set to the positive direction of the main scanning direction,
The nozzle having the smallest sub-scan direction coordinate among the nozzles of the module head arranged closest to the second line head among the module heads arranged on the first line head is A,
If the main scanning direction coordinate of the nozzle having the smallest sub-scanning direction coordinate among the nozzles of the module head arranged nearest to the first line head among the module heads arranged in the second line head is B,
And the liquid droplet ejection head is arranged so that A is smaller than the B value. The method according to claim 1,
When the main scan direction coordinate of the nozzle having the smallest sub-scan direction coordinate among the nozzles of the module head arranged at a position away from the second line head at most among the module heads arranged in the first line head is C,
And the liquid droplet ejection head is arranged so that A is smaller than the C value. The method according to claim 1,
Wherein the first line head and the second line head have the same structure and the position of the head end face in the main scanning direction parallel to the axis in the sub scanning direction of each line head is the same. 4. The method according to any one of claims 1 to 3,
Further comprising a third line head,
And the arrangement relationship of the second line head and the third line head is the same as the arrangement relationship of the first line head and the second line head. 4. The method according to any one of claims 1 to 3,
Wherein the liquid ejection head is arranged such that the difference between the letter A and the letter B is an integral multiple of the distance in the main scanning direction between nozzles forming printing dots adjacent to the sub-scanning direction. The method of claim 4,
Wherein the liquid ejection head is arranged such that the difference between the letter A and the letter B is an integral multiple of the distance in the main scanning direction between nozzles forming printing dots adjacent to the sub-scanning direction. The method of claim 2,
Wherein the liquid ejection head is arranged so that the difference between the letter A and the letter C is an integral multiple of the distance in the main scanning direction between the nozzles forming the printing dot adjacent to the sub scanning direction. The module head having a single or a plurality of nozzle rows in which the nozzles are arranged at the same pitch is moved in the sub scanning direction so that the nozzle row has a certain angle of inclination with respect to the sub scanning direction parallel to the width direction of the printing object A plurality of line heads arranged in parallel with each other are arranged in parallel with each other in the sub-scanning direction so that the printing pitch is the same, a liquid droplet ejected from the nozzle is ejected in a main scanning direction perpendicular to the sub- An ink jet apparatus for applying ink to a relatively moving object to be printed,
The module head disposed at a position closest to the other line head among the plurality of module heads arranged in one line head in the adjacent line head included in the line head group, Each of the nozzles located at one end of the nozzle row at a position corresponding to each of the module heads disposed at a position closest to the one line head among the plurality of module heads is shifted so as not to be on the same line parallel to the sub- Wherein the ink jet device comprises: The method of claim 8,
Wherein the module head has one or more rows of the nozzle rows,
Wherein the nozzles located at the one end of the nozzle row in each module head of the plurality of module heads arranged in the line head are arranged on the same line parallel to the sub scanning direction. The method of claim 8,
Wherein the module head has one or more rows of the nozzle rows,
Wherein the nozzles located at the one end of the nozzle row in each module head of the plurality of module heads arranged in the line head are shifted so as not to be on the same line parallel to the sub scanning direction. The module head having a single or a plurality of nozzle rows in which the nozzles are arranged at the same pitch is moved in the sub scanning direction so that the nozzle row has a certain angle of inclination with respect to the sub scanning direction parallel to the width direction of the printing object A plurality of line heads arranged in parallel with each other are arranged in parallel with each other in the sub-scanning direction so that the printing pitch is the same, a liquid droplet ejected from the nozzle is ejected in a main scanning direction perpendicular to the sub- A method of arranging a head of an ink jet apparatus for applying the ink onto a relatively moving object to be printed,
The module head disposed at a position closest to the other line head among the plurality of module heads arranged in one line head in the adjacent line head included in the line head group, Each of the nozzles located at one end of the nozzle array corresponding to each of the module heads disposed at a position closest to the one line head among the plurality of module heads is shifted so as not to be on the same line parallel to the sub- Wherein the ink jet head is disposed in the vicinity of the head.

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