CN217197339U - Gravure plate and gravure printing machine - Google Patents

Abstract

The utility model provides an intaglio and intaglio printing machine can further improve the homogeneity of the paste that flows in the concave part. The intaglio plate has a cylindrical or cylindrical shape and is rotatable about an axis, and a recessed portion (13) for holding a paste (12) to be transferred to a transfer target sheet (3) is provided on the outer peripheral surface of the intaglio plate, wherein a plurality of bank structures (20) having vertical banks (15) are provided inside the recessed portion: in the circumferential direction of the depressed plate, 1 st and 2 nd vertical banks are alternately arranged, the 1 st vertical bank extending obliquely to one side in the axial direction with respect to the circumferential direction, the 2 nd vertical bank being connected to an end of the 1 st vertical bank and extending obliquely to the other side in the axial direction with respect to the circumferential direction, connection portions (151) of the 1 st and 2 nd vertical banks alternately protruding to one side and the other side in the axial direction, and the 1 st and 2 nd bank structures adjacent to each other in the bank structure are divided into a plurality of cells communicating with each other.

Description

Gravure plate and gravure printing machine

Technical Field

The utility model relates to an intaglio and intaglio printing machine.

Background

In the case of manufacturing a laminated electronic component such as a laminated ceramic capacitor, for example, gravure printing is widely used in which a conductive paste to be an internal electrode is transferred to a transfer target sheet such as a ceramic green sheet. An intaglio printing press for performing intaglio printing includes a cylindrical intaglio plate having a concave portion in the shape of a transfer pattern formed on an outer peripheral surface thereof, and an impression cylinder that sandwiches a to-be-transferred sheet between the intaglio plate and presses the to-be-transferred sheet toward the intaglio plate.

When the depressed plate rotates, the concave portion to which the paste is supplied from the paste supply portion is gradually raised, and the paste in the concave portion is transferred to the transfer target sheet at a position where the transfer target sheet is sandwiched.

During transfer, the inside of the concave portion is in a state in which the horizontal position on the front side in the rotation direction, i.e., the transfer direction, is higher than the horizontal position on the rear side. Therefore, the paste held in the concave portion is shifted to the rear side in the transfer direction. When the paste is transferred to the transfer target sheet in this state, the transfer amount of the paste on the front side in the transfer direction is smaller than the transfer amount of the paste on the rear side, and the transferred paste may be blurred.

Therefore, there have been techniques for: the concave portion is divided into a plurality of cells by providing a vertical bank extending in the transfer direction of the sheet to be transferred and a horizontal bank extending in the direction orthogonal to the transfer direction in the concave portion, thereby preventing the paste from being deviated backward. The horizontal banks serve as starting points for paste transfer to the sheet to be transferred, and the occurrence of blur in the transferred paste is reduced.

However, if the inside of the concave portion is completely divided into a plurality of independent cells, if the amount of the paste in the concave portion is not uniform, the thickness of the paste to be transferred may become non-uniform.

Therefore, conventionally, there is a technique of providing a gap in the banks to partially communicate the cells adjacent to each other in the transfer direction (see, for example, patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2007-320316

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

According to the above-described conventional technique, since the cells communicate with each other, the paste can flow in the recess.

An object of the utility model is to provide a can further improve the intaglio and the intaglio printing machine of the homogeneity of the past that flows in the concave part.

Means for solving the problems

In order to solve the above problems, according to a first aspect of the present invention, there is provided an intaglio plate having a cylindrical or cylindrical shape and rotatable about an axis, the intaglio plate having a recessed portion on an outer peripheral surface thereof for holding a paste transferred to a transfer target sheet, wherein the recessed portion includes a plurality of bank structures inside the recessed portion, the bank structures including vertical banks: in a circumferential direction of the recessed plate, 1 st and 2 nd longitudinal banks are alternately arranged, the 1 st longitudinal bank extending obliquely to one side in an axial direction with respect to the circumferential direction, the 2 nd longitudinal bank being connected to an end of the 1 st longitudinal bank and extending obliquely to the other side in the axial direction with respect to the circumferential direction, a connection portion of the 1 st and 2 nd longitudinal banks alternately protruding to one side and the other side in the axial direction, and a space between the 1 st and 2 nd bank structures adjacent to each other in the bank structures is divided into a plurality of cells communicating with each other.

The inclination angle of the 1 st vertical bank and the 2 nd vertical bank with respect to the circumferential direction may be 45 degrees or more and less than 75 degrees.

The bank structure may include a plurality of horizontal banks extending in the axial direction from a side of the connection portion protruding in the axial direction.

The bank may include a plurality of 1 st banks extending from a 1 st connection portion of the connection portions to one side in the axial direction to the one side, and a plurality of 2 nd banks extending from a 2 nd connection portion of the connection portions to the other side in the axial direction to the other side.

The vertical bank of the 1 st bank structure may overlap the horizontal bank extending from the 2 nd bank structure to the 1 st bank structure side over a predetermined range in the axial direction.

The longitudinal bank of the 1 st bank structure may be separated from the lateral bank extending from the 2 nd bank structure toward the 1 st bank structure in the axial direction.

Furthermore, the utility model discloses a 2 nd technical scheme provides an intaglio printing press, wherein, this intaglio printing press possesses: an intaglio plate having a cylindrical or cylindrical shape and rotatable about an axis, the intaglio plate having a recessed portion on an outer peripheral surface thereof for holding a paste to be transferred onto a transfer target sheet, wherein the recessed portion includes a plurality of bank structures having vertical banks as follows: alternately disposing a 1 st vertical bank and a 2 nd vertical bank in a circumferential direction of the depressed plate, the 1 st vertical bank extending obliquely to one side in an axial direction with respect to the circumferential direction, the 2 nd vertical bank being connected to an end of the 1 st vertical bank and extending obliquely to the other side in the axial direction with respect to the circumferential direction, a connection portion of the 1 st vertical bank and the 2 nd vertical bank alternately protruding to one side and the other side in the axial direction, and a space between a 1 st bank structure and a 2 nd bank structure adjacent to each other in the bank structures being divided into a plurality of cells communicating with each other; a paste supply unit in which the paste is stored; and an impression cylinder that sandwiches the sheet to be transferred between the impression cylinder and the intaglio plate.

Effect of the utility model

According to the present invention, an intaglio printing press and an intaglio printing press capable of further improving the uniformity of paste flowing in a recess can be provided.

Drawings

Fig. 1 is a schematic view showing an intaglio printing press 1.

Fig. 2 is a cross-sectional view of the ceramic green sheet 3 to which the conductive paste 12 is transferred using the gravure printing machine 1.

Fig. 3 is a perspective view of the depressed plate 2.

Fig. 4 is an enlarged view of the concave portion 13.

Fig. 5 is an enlarged view of a modification of the recess 13.

Description of the reference numerals

S1, an inner space; x, circumferential direction; y, axial direction; 1. an intaglio printing press; 2. intaglio printing; 2A, a shaft; 3. a ceramic green sheet; 4. an impression cylinder; 8. a ceramic slurry; 10. a carrier film; 11. a paste supply unit; 12. a conductive paste; 13. a recess; 14. a scraper; 15. a longitudinal dike; 15a, the 1 st vertical bank; 15b, the 2 nd vertical bank; 16. a transverse dike; 16a, 1 st horizontal bank; 16b, 2 nd bank; 17. a unit; 18. a gap; 20. and (5) constructing a dike.

Detailed Description

The following describes an intaglio printing press 1 according to embodiment 1 of the present invention, an intaglio plate 2 provided in the intaglio printing press 1, and a method for manufacturing a laminated ceramic capacitor as an example of a laminated electronic component using the intaglio printing press 1. Fig. 1 is a schematic view showing an intaglio printing press 1. Fig. 2 is a cross-sectional view of the ceramic green sheet 3 to which the conductive paste 12 is transferred using the gravure printing machine 1.

The gravure printing machine 1 is a device that transfers a conductive paste 12, which is an internal electrode of a laminated ceramic capacitor, onto a ceramic green sheet 3, which is a transfer target sheet.

The intaglio printing press 1 comprises: a cylindrical depressed plate 2 in which a concave portion 13 in the shape of a transfer pattern of the conductive paste 12 is formed; a paste supply unit 11 in which a conductive paste 12 is stored; an impression cylinder 4 that sandwiches the ceramic green sheet 3 between the impression cylinder and the intaglio 2; and a doctor blade 14 disposed on a side portion of the depressed plate 2. Hereinafter, the side of the depressed plate 2 on which the paste supply portion 11 is disposed is referred to as a lower side. The impression cylinder 4 is disposed above the depressed plate 2. The gravure plate 2 and the impression cylinder 4 rotate in the direction of arrow 5 and the direction of arrow 6, respectively, thereby conveying the ceramic green sheet 3 in the direction of arrow 7.

(ceramic green sheet 3)

The ceramic green sheet 3 shown in fig. 2 is a transfer target sheet in a band shape obtained by molding a ceramic slurry 8 containing a ceramic powder, a binder and a solvent on a carrier film 10 using a die coater, a gravure coater, a mini-gravure coater or the like.

(intaglio 2)

Fig. 3 is a perspective view of the depressed plate 2. The depressed plate 2 is rotatable about a horizontally extending shaft 2A, and has a cylindrical or columnar member. The depressed plate 2 has a plurality of recesses 13 formed on the outer peripheral surface thereof, the recesses corresponding to the shape of the transfer pattern transferred to the ceramic green sheet 3. In fig. 3, only two recesses 13 are shown, but the recesses 13 are arranged at substantially equal intervals in the axial direction Y and the transfer direction (circumferential direction) X of the outer peripheral surface of the depressed plate 2.

In the embodiment, the recessed portions 13 are arranged such that the longitudinal direction of the recessed portions 13 is oriented in the transfer direction (circumferential direction) X of the recessed plate 2 and the width direction of the recessed portions 13 is oriented in the axial direction Y parallel to the axis 2A of the recessed plate 2.

(concave part 13)

Fig. 4 is an enlarged view of 1 recess 13. The recesses 13 are formed by etching, engraving, or the like using a photomask blank, and the plurality of recesses 13 have the same shape and are formed to be arranged at constant intervals in the axial direction Y and the transfer direction (circumferential direction) X of the depressed plate 2.

A plurality of bank structures 20 are provided in each recess 13. The details of the bank structure 20 will be described later.

(paste supply part 11)

Referring back to fig. 1, the paste supply portion 11 is a reservoir tank for the conductive paste 12 disposed below the depressed plate 2. The conductive paste 12 contains, for example, Ni powder having a particle diameter of 0.03 to 1 μm as a conductive material. Further, a resin is used as the binder. Further, a ceramic material, a dispersant, and the like for controlling shrinkage during sintering are added. The conductive paste 12 is stored in the paste supply section 11, and the lower portion of the depressed plate 2 is immersed in the conductive paste 12. This allows the conductive paste 12 to be held in the concave portion 13 on the outer peripheral surface of the depressed plate 2.

(scraper 14)

A doctor blade 14 is disposed on a side of the depressed plate 2. The conductive paste 12 enters the concave portion 13 of the depressed plate 2 in the paste supply portion 11, and is conveyed to the contact portion with the ceramic green sheet 3 by the rotation of the depressed plate 2. In the middle, the doctor blade 14 is pressed against the surface of the depressed plate 2, and the conductive paste 12 adhering to the portion of the surface of the depressed plate 2 other than the recessed portion 13 is scraped off by the doctor blade 14.

(impression cylinder 4)

The impression cylinder 4 is disposed on the depressed plate 2, and is a cylindrical or columnar member that rotates about an impression cylinder axis 4A substantially parallel to the axis 2A. The outer peripheral surface of the impression cylinder 4 is covered with an elastic member. The elastic member is made of a rubber member such as silicone rubber or urethane rubber, or a resin material, but is not limited thereto, and may be made of another elastic material.

The impression cylinder 4 sandwiches the ceramic green sheet 3 with the depressed plate 2, and presses the ceramic green sheet 3 toward the depressed plate 2.

Here, the impression cylinder 4 is an elastic body and thus elastically deforms, and the contact portion of the depressed plate 2 and the impression cylinder 4 has a predetermined impression width N. The conductive paste 12 held in the concave portion 13 of the depressed plate 2 is transferred to the ceramic green sheet 3 in the range of the imprint width N. In the embodiment, the dimension L in the longitudinal direction, which is the transfer direction (circumferential direction) X, of the recessed portion 13 of the depressed plate 2 is smaller than the nip width N.

(Dike structure 20)

Next, the plurality of bank structures 20 provided in the recess 13 will be described in detail. Fig. 4 is an enlarged view of 1 recess 13. In addition, a transfer direction (circumferential direction) X shown in fig. 4 is a direction opposite to a rotation direction shown by an arrow 5 shown in fig. 1. The right end side of the concave portion 13 in fig. 4 is a transfer start end, and the left end side is a transfer end, and in the transfer step, the contact position of the concave portion 13 with the ceramic green sheet 3 is moved from the right end side to the left end side in fig. 4.

Each bank structure 20 includes 1 vertical bank 15 extending in a zigzag shape in the transfer direction (circumferential direction) X and a plurality of horizontal banks 16(16a, 16b) extending in the axial direction Y from the vertical bank 15.

Hereinafter, one of the bank structures 20 adjacent to each other is referred to as a 1 st bank structure 20A, and the other is referred to as a 2 nd bank structure 20B as appropriate.

(vertical dike 15)

The longitudinal dike 15 is in such a zigzag shape: the first and second vertical banks 15a and 15B are alternately arranged from a start end side of one side of the outer peripheral surface in the transfer direction (circumferential direction) X toward a terminal end side of the other side, the first vertical bank 15a extends obliquely at a predetermined angle θ to one side in the axial direction Y with respect to the transfer direction (circumferential direction) X, the second vertical bank 15B extends obliquely at a predetermined angle- θ to the other side in the axial direction Y from a first connecting portion 151A connected to the first vertical bank 15a with respect to the transfer direction (circumferential direction) X, and connecting portions 151(151A, 151B) of the first and second vertical banks 15a and 15B alternately protrude to one side and the other side in the axial direction Y. θ is preferably 45 degrees or more and less than 75 degrees, and more preferably 60 degrees. In addition, the angle includes an error of about ± 1 degree.

(inner space S1)

Further, an internal space S1 extending in a zigzag manner in the transfer direction (circumferential direction) X is formed between the 1 st bank structure 20A and the 2 nd bank structure 20B, that is, between the vertical bank 15A of the 1 st bank structure 20A and the vertical bank 15B of the 2 nd bank structure 20B.

(horizontal dike 16)

The horizontal banks 16 include a plurality of 1 st horizontal banks 16a extending from the convex portion of the 1 st connection 151A protruding toward one side in the axial direction Y toward the one side in the axial direction Y, and a plurality of 2 nd horizontal banks 16B extending from the convex portion of the 2 nd connection 151B protruding toward the other side in the axial direction Y.

(Unit 17)

The internal space S1 is divided into a plurality of cells 17 by a plurality of 1 st horizontal banks 16a of the 1 st bank structure 20A extending toward the 2 nd bank structure 20B and a plurality of 2 nd horizontal banks 16B of the 2 nd bank structure 20B extending toward the 1 st bank structure 20A.

Here, the vertical bank 15A of the 1 st bank structure 20A overlaps the 2 nd horizontal bank 16B of the 2 nd bank structure 20B extending toward the 1 st bank structure 20A in a predetermined range Y1 in the axial direction Y. That is, the tip of the 2 nd horizontal bank 16B extending from the 2 nd bank structure 20B toward the 1 st bank structure 20A extends toward the 1 st bank structure 20A beyond the 1 st connecting portion 151A of the 1 st bank structure 20A protruding toward the 2 nd bank structure 20B.

Similarly, the vertical bank 15B of the 2 nd bank structure 20B overlaps the 1 st horizontal bank 16a of the 1 st bank structure 20A extending toward the 2 nd bank structure 20B within a predetermined range Y1 in the axial direction Y. That is, the leading end of the 1 st horizontal bank 16a extending from the 1 st bank structure 20A toward the 2 nd bank structure 20B extends toward the 2 nd bank structure 20B beyond the 2 nd connecting portion 151B of the 2 nd bank structure 20B protruding toward the 1 st bank structure 20A.

(gap 18)

The 1 st bank structure 20A is not connected to the 2 nd bank structure 20B. That is, a gap 18 is provided between the horizontal bank 16 of the 1 st bank structure 20A and the vertical bank 15B of the 2 nd bank structure 20B. The cells 17 adjacent in the transfer direction (circumferential direction) X are communicated by the gap 18.

(lateral side horizontal dike)

The recess 13 is rectangular and includes a side surface 131 extending in the transfer direction (circumferential direction) X.

(side space S2)

A side space S2 communicating in the transfer direction (circumferential direction) X is formed between the bank structure 20 and the side surface 131.

(side wall side horizontal dike 21)

A side-face-side lateral bank 21 extending in the side space S2 from the side face 131 toward the connection portion 151 in the vertical bank 15 of the bank structure 20 is provided, and the side face 131 side of the connection portion 151 is a concave portion. The side space S2 is divided into a plurality of cells 171 by the side bank 21 and the bank 16 extending in the side space S2.

(gap 28)

A gap 28 is provided between the side-face-side lateral bank 21 extending from the side face 131 toward the bank structure 20 and the connection portion 151.

(gap 29)

Further, a gap 29 is provided between the lateral bank 16 extending from the bank structure 20 to the side surface 131 and the side surface 131.

That is, the bank structure 20 is not connected to the side surface 131 by the gap 28 and the gap 29.

(transfer step of conductive paste 12)

Next, a transfer step of transferring the conductive paste 12 to the ceramic green sheet 3 by using the gravure printing machine 1 will be described.

The depressed plate 2 is rotated by a driving device not shown. Then, as shown in fig. 1, the lower portion of the depressed plate 2 is immersed in the conductive paste 12 stored in the paste supply portion 11, and the conductive paste 12 is held in the plurality of concave portions 13 formed on the outer peripheral surface of the depressed plate 2.

When the depressed plate 2 rotates to pass the doctor blade 14, the excess conductive paste 12 on the outer peripheral surface of the depressed plate 2 is scraped off.

By rotating the depressed plate 2, the conductive paste 12 in the concave portion 13 is further conveyed to the contact position with the ceramic green sheet 3.

At the contact position, the ceramic green sheet 3 is pressed against the outer peripheral surface of the depressed plate 2 by the impression cylinder 4. At this time, the conductive paste 12 filled in the concave portion 13 of the depressed plate 2 is transferred to the ceramic green sheet 3, and the conductive paste 12 in a pattern is printed on the ceramic green sheet 3.

Here, in fig. 4, only a partial flow of the conductive paste 12 is shown by an arrow, but when the transfer start end portion of the concave portion 13 moves to the contact position, the horizontal position on the front side in the transfer direction (circumferential direction) X is higher than the horizontal position on the rear side in the transfer direction X inside the concave portion 13. Therefore, the conductive paste 12 held in the recess 13 tends to flow toward the rear side in the transfer direction (circumferential direction) X.

(effect of spatial shape)

However, in the internal space S1, the conductive paste 12 meanders along the zigzag-shaped internal space S1 from the leading end side to the trailing end side in the transfer direction (circumferential direction) X.

In the side space S2, the conductive paste 12 meanders and flows from the leading end side to the trailing end side in the transfer direction (circumferential direction) X along the side space S2 having the zigzag side surface on the bank structure 20 side.

Therefore, the flow rate of the conductive paste 12 is lowered, and the conductive paste 12 on the transfer starting end side is less likely to be blurred when transferred to the ceramic green sheet 3.

(effect of the horizontal dike 16)

The internal space S1 is divided into a plurality of cells 17 by the banks 16.

The lateral space S2 is divided into a plurality of cells 171 by the lateral banks 16 and the lateral banks 21.

Therefore, the backward flow of the conductive paste 12 can be further inhibited. The lateral banks 16 and the lateral-side lateral banks 21 become starting points from which the conductive paste 12 is transferred to the ceramic green sheet 3, and the transferred conductive paste 12 is less likely to be blurred.

Further, when the depressed plate 2 rotates and is separated from the ceramic green sheet 3, a wire drawing phenomenon of the conductive paste 12 occurs.

The generated filament meanders in the axial direction Y along the side surfaces of the vertical banks 15 and the side surfaces of the horizontal banks 16 extending obliquely at a predetermined angle θ while moving in the transfer direction (rotation direction) X. Thus, the conductive paste 12 can be uniformly applied as compared with the case where the filament is continuously generated at a constant position in the axial direction Y.

(effect of communication between units 17 and 171)

For example, unlike the embodiment, the 1 st bank structure 20A and the 2 nd bank structure 20B are connected, and the bank structure 20 and the side surface 131 are connected.

Thus, the recess 13 is completely divided into the plurality of cells 17 and the cell 171. In this case, the flow of the conductive paste 12 or the filament between the adjacent cells 17 and 171 does not occur at the time of transfer, and when the amount of the conductive paste 12 in the cells 17 and 171 is not uniform, the thickness of the transferred conductive paste 12 may become non-uniform.

However, in the embodiment, the 1 st bank structure 20A and the 2 nd bank structure 20B are not connected.

That is, the lateral banks 16 of the 1 st bank structure 20A and the vertical banks 15B of the 2 nd bank structure 20B are not connected but provided with the gaps 18. The horizontal bank 16 of the 2 nd bank structure 20B is not connected to the vertical bank 15A of the 1 st bank structure 20A, but is provided with a gap 18. Then, the cells 17 adjacent in the transfer direction (circumferential direction) X are partially communicated with each other by these gaps 18.

In the embodiment, the bank structure 20 is not connected to the side surface 131.

That is, a gap 29 is provided between the lateral banks 16 extending from the bank structure 20 and the side surface 131, and a gap 28 is provided between the side-surface-side lateral banks 21 extending from the side surface 131 and the lateral banks 16 of the bank structure 20, so that the cells 171 adjacent in the transfer direction (circumferential direction) X partially communicate with each other.

Therefore, the conductive paste 12 can flow between the cells 17 adjacent in the transfer direction (circumferential direction) X and between the cells 171. Thus, the conductive paste 12 can flow while filling the cells 17 and the cells 171 partitioned by the horizontal banks 16 and the side-face horizontal banks 21. As a result, the uniformity of the thickness of the transferred conductive paste 12 is improved.

(Effect of overlap)

Further, the vertical bank 15 of the 1 st bank structure 20A overlaps the horizontal bank 16 of the 2 nd bank structure 20B extending toward the 1 st bank structure 20A in a predetermined range Y1 in the axial direction Y.

Therefore, the speed of the flow of the conductive paste 12 becomes slower, and the residence time in each cell 17 is sufficiently ensured. Thus, a more sufficient amount of the conductive paste 12 is secured at the time of transfer to the ceramic green sheet 3.

(Effect of recess Width)

In the embodiment, the dimension L in the transfer direction (circumferential direction) X of the recessed portion 13 of the depressed plate 2 is smaller than the nip width N.

Therefore, at the time of transfer, the ceramic green sheet 3 is separated from the depressed plate 2 after the entire depressed portion 13 comes into contact with the ceramic green sheet 3. Therefore, the uniformity of transfer of the conductive paste 12 to the ceramic green sheet 3 can be further improved.

(method for manufacturing multilayer ceramic capacitor)

Next, a method for manufacturing the multilayer ceramic capacitor will be described.

After the ceramic green sheets 3 on which the conductive paste 12 shown in fig. 2 is formed are obtained using the gravure printing machine 1, a plurality of ceramic green sheets 3 are laminated and pressure-bonded, cut as necessary, and then fired to produce a laminate. Then, the external electrodes are formed on the laminated body to manufacture the laminated ceramic capacitor.

In the multilayer ceramic capacitor, as described above, the conductive paste 12 is smooth as a whole without blurring or the like.

Therefore, stress is not locally concentrated in the pressure bonding step, and thus it is possible to prevent a short-circuit failure in which the internal electrodes contact via the ceramic layers, or an insulation resistance failure in which the thickness of the ceramic layers is locally reduced.

(Experimental example)

Next, a plurality of depressed plates 2 having different bank shapes in the inner region of the depressed portion 13 were prepared, 100 inner electrodes were printed by depressed plate printing using the depressed plates 2, and the results of observation of whether printing was blurred by an optical microscope are shown in the following table. In the table, 35 or more out of 100 pieces were judged as "x", 10 or more and less than 35 pieces were judged as "Δ", 1 or more and less than 10 pieces were judged as "excellent", and 0 piece was judged as "excellent".

Comparative example

Comparative example 1 is a case where only banks extending parallel to the transfer direction (circumferential direction) X are present.

In comparative example 2, the zigzag-shaped vertical banks 15 were included, the inclination angle θ of the vertical banks 15 was 60 degrees, the horizontal banks 16 were included, the horizontal banks 16 extended to the vertical banks 15 and connected, and the cells 17 were not connected to each other.

(examples)

In example 1, the zigzag-shaped vertical banks 15 are included, the inclination angle θ of the vertical banks 15 is 60 degrees, and the horizontal banks 16 are not included.

In example 2, the zigzag-shaped vertical banks 15 are included, the inclination angle θ of the vertical banks 15 is 60 degrees, the horizontal banks 16 are included, the adjacent horizontal banks 16 do not overlap each other, and the horizontal bank 16 and the side-face horizontal bank 21 do not overlap each other in the axial direction Y.

In examples 3 to 10, the zigzag-shaped vertical banks 15 and the zigzag-shaped horizontal banks 16 are included, and the inclination angles θ of the vertical banks 15 are different.

Example 3 is a case where θ is 45 degrees, example 4 is a case where θ is 50 degrees, example 5 is a case where θ is 55 degrees, example 6 is a case where θ is 60 degrees, example 7 is a case where θ is 65 degrees, example 8 is a case where θ is 70 degrees, example 9 is a case where θ is 75 degrees, and example 10 is a case where θ is 80 degrees.

(results)

In the case of comparative example 1, 35 out of 100 had print blur, which was x,

in the case of comparative example 2, 18 out of 100 had print blur, which was a.DELTA.,

in the case of example 1, 25 out of 100 had print blur, which was a,

in the case of example 2, 18 out of 100 had print blur, which was a,

in the case where θ of example 3 was 45 degrees, 6 out of 100 pieces had print blur and were good,

in the case where θ of example 4 was 50 degrees, 4 out of 100 had print blur and was good,

in the case where θ of example 5 was 55 degrees, 5 out of 100 had print blur and was good,

when θ in example 6 was 60 degrees, 0 out of 100 pieces had print blur and was very excellent,

in the case of example 7 in which θ was 65 degrees, 5 out of 100 had print blur and was good,

in the case where θ of example 8 was 70 degrees, 7 out of 100 had print blur and was good,

in the case where θ of example 9 was 75 degrees, 12 out of 100 had print blur, and it was Δ,

when θ in example 10 was 80 degrees, 31 out of 100 pieces had print blur, and it was Δ.

As is clear from comparison between comparative example 1 in which only the vertical banks extending parallel to the transfer direction are provided and example 1 in which the vertical banks 15 are zigzag, it is possible to reduce print blur by making the vertical banks 15 zigzag as compared with the case where only the banks extending parallel to the transfer direction (circumferential direction) X are provided.

As is clear from comparison of examples 3 to 10 in which the inclination angle θ of the vertical banks 15 is different, the inclination angle θ of the vertical banks 15 is preferably 45 degrees or more and less than 75 degrees, and more preferably about 60 degrees. It is also found that when the inclination angle θ of the vertical banks 15 is 75 degrees or more, the effect of reducing the occurrence of print blur is reduced without change as compared with the case where only the horizontal banks 16 perpendicular to the transfer direction (circumferential direction) X are present.

As is clear from comparison between comparative example 2 in which the banks 16 are provided and the cells 17 are not communicated with each other and example 6 in which the banks 16 are provided and the cells 17 are communicated with each other, the print blur is reduced in such a manner that the cells 17 are communicated with each other.

As is clear from comparison between example 1 in which the horizontal banks 16 are not provided and example 6 in which the horizontal banks 16 are provided, the form in which the horizontal banks 16 are provided reduces print blur.

As is clear from a comparison between example 2 in which the horizontal banks 16 do not overlap each other and example 6 in which the horizontal banks 16 overlap each other, the print blur is reduced in such a manner that the horizontal banks 16 overlap each other.

While one embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications are possible.

In the embodiment, the bank structure 20 is a structure in which the lateral banks 16 extend from the vertical banks 15, but is not limited thereto, and may be a structure not including the lateral banks 16. In this case, the internal space S1 between the 1 st bank structure 20A and the 2 nd bank structure 20B adjacent to each other is also zigzag-shaped. The side space S2 between the bank structure 20 and the side surface 131 has a zigzag shape on the bank structure 20 side.

Therefore, the conductive paste 12 passing through the internal space S1 and the side space S2 flows meandering in the transfer direction (circumferential direction) X, and therefore the flow of the conductive paste 12 can be decelerated, which is effective in reducing the blur of the conductive paste 12 when transferring the conductive paste to the ceramic green sheet 3.

In the embodiment, the horizontal banks 16 extend from the vertical banks 15 to both sides in the axial direction Y, but the present invention is not limited to this, and the horizontal banks 16 may extend only to one side in the axial direction Y.

In this case, the internal space S1 between the 1 st bank structure 20A and the 2 nd bank structure 20B adjacent to each other is wider than that of the above-described embodiment, but can be divided by the horizontal bank 16.

Therefore, the flow of the conductive paste 12 passing through the internal space S1 can be decelerated, which is effective for reducing the blur of the conductive paste 12 when transferring the conductive paste to the ceramic green sheet 3.

Fig. 5 is a diagram showing a modification of the embodiment. The modification differs from the above-described embodiment in that the vertical bank 15 of the 1 st bank structure 20A does not overlap with the horizontal bank 16 of the 2 nd bank structure 20B extending toward the 1 st bank structure 20A in the axial direction Y, but has a gap of a predetermined range Y2.

That is, the top end of the vertical bank 15 extending from the 1 st bank structure 20A toward the 2 nd bank structure 20B is positioned closer to the 1 st bank structure 20A than the convex portion of the 2 nd bank structure 20B protruding toward the 1 st bank structure 20A.

The modification also has substantially the same effect as the embodiment described above. However, since the vertical banks 15 of the 1 st bank structure 20A do not overlap the horizontal banks 16 of the 2 nd bank structure 20B extending toward the 1 st bank structure 20A in the axial direction Y, the speed of the conductive paste 12 flowing is not slowed to the extent as in the above-described embodiment. Therefore, for example, the conductive paste 12 can be applied to a case where the viscosity is high and the flow is difficult.

Claims (7)

1. An intaglio plate having a cylindrical or columnar shape and rotatable about an axis, the intaglio plate having a recess on an outer peripheral surface thereof for holding a paste transferred onto a sheet to be transferred,

the concave portion includes a plurality of bank structures each having a longitudinal bank: a 1 st longitudinal bank and a 2 nd longitudinal bank are alternately arranged in a circumferential direction of the depressed plate, the 1 st longitudinal bank extending obliquely to one side in an axial direction with respect to the circumferential direction, the 2 nd longitudinal bank being connected to an end of the 1 st longitudinal bank and extending obliquely to the other side in the axial direction with respect to the circumferential direction, a connection portion of the 1 st longitudinal bank and the 2 nd longitudinal bank protruding alternately to one side and the other side in the axial direction,

the 1 st bank structure and the 2 nd bank structure adjacent to each other among the bank structures are divided into a plurality of cells communicating with each other.

2. The intaglio plate according to claim 1,

the inclination angle of the 1 st vertical bank and the 2 nd vertical bank with respect to the circumferential direction is 45 degrees or more and less than 75 degrees.

3. Intaglio plate according to claim 1 or 2, characterized in that,

the bank structure includes a plurality of transverse banks extending in the axial direction from a side of the connection portion protruding in the axial direction.

4. The intaglio plate according to claim 3,

the lateral embankments include a plurality of 1 st lateral embankments extending from a 1 st connection portion protruding toward one side in the axial direction among the connection portions to the one side, and a plurality of 2 nd lateral embankments extending from a 2 nd connection portion protruding toward the other side in the axial direction among the connection portions to the other side.

5. The intaglio plate according to claim 3,

the vertical bank of the 1 st bank structure overlaps the horizontal bank extending from the 2 nd bank structure to the 1 st bank structure side over a predetermined range in the axial direction.

6. The intaglio plate according to claim 3,

the vertical bank of the 1 st bank structure is separated from the horizontal bank extending from the 2 nd bank structure to the 1 st bank structure side in the axial direction.

7. An intaglio printing press, characterized in that,

the gravure printing machine is provided with:

an intaglio plate having a cylindrical or cylindrical shape and rotatable about an axis, the intaglio plate having a recessed portion on an outer peripheral surface thereof for holding a paste to be transferred onto a sheet to be transferred, wherein the recessed portion includes a plurality of bank structures inside the recessed portion, the bank structures including vertical banks: alternately arranging 1 st and 2 nd longitudinal banks in a circumferential direction of the depressed plate, the 1 st longitudinal bank extending obliquely to one side in an axial direction with respect to the circumferential direction, the 2 nd longitudinal bank being connected to an end of the 1 st longitudinal bank and extending obliquely to the other side in the axial direction with respect to the circumferential direction, a connection portion of the 1 st and 2 nd longitudinal banks alternately protruding to one side and the other side in the axial direction, and a space between the 1 st and 2 nd bank structures adjacent to each other in the bank structures being divided into a plurality of cells communicating with each other;

a paste supply unit in which the paste is stored; and

and an impression cylinder that sandwiches the sheet to be transferred between the impression cylinder and the intaglio.

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