CN217455295U

CN217455295U - Gravure plate and gravure printing machine

Info

Publication number: CN217455295U
Application number: CN202220334478.8U
Authority: CN
Inventors: 幸川进一; 平野博之; 金山吉广
Original assignee: Murata Manufacturing Co Ltd
Current assignee: Murata Manufacturing Co Ltd
Priority date: 2021-02-22
Filing date: 2022-02-18
Publication date: 2022-09-20
Anticipated expiration: 2032-02-18
Also published as: JP2022128292A; KR102594301B1; KR20220120465A

Abstract

The utility model provides a can improve gravure and gravure press of the homogeneity of the volume of paste in the concave part. A recessed portion for holding a paste is provided on an outer peripheral surface of the recessed plate, wherein a bank structure is provided inside the recessed portion, the bank structure including: vertical banks in which a 1 st vertical bank extending obliquely to one side in the axial direction with respect to the circumferential direction and a 2 nd vertical bank connected to an end of the 1 st vertical bank and extending obliquely to the other side are alternately arranged in the circumferential direction, and a connection portion between the 1 st vertical bank and the 2 nd vertical bank alternately protrudes to one side and the other side in the axial direction; a plurality of transverse dikes which axially extend from one side of the connecting part protruding in the axial direction; and a transfer auxiliary unit provided at the tip of the lateral bank, the outline of the tip side of the transfer auxiliary unit being a wave shape in which curved recesses and projections are repeatedly formed in a cross section along the outer peripheral surface of the depressed plate, and the 1 st bank structure and the 2 nd bank structure adjacent to each other in the bank structures being 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 laid-open patent publication No. 2007-320316

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

The utility model aims at providing an intaglio and intaglio printing machine that can further improve the homogeneity of the volume of paste in the concave part in the structure that the horizontal dyke sets up the clearance and makes adjacent cell in the direction of transfer communicate with each other partially.

Means for solving the problems

In order to solve the above problem, according to a first aspect of the present invention, there is provided an intaglio plate having a cylindrical or columnar 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 sheet to be transferred, wherein the recessed portion includes a bank structure inside the recessed portion, the bank structure including: vertical banks in which a 1 st vertical bank extending obliquely to one side in an axial direction with respect to the circumferential direction and a 2 nd vertical bank 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 are alternately arranged in the circumferential direction of the depressed plate, and a connection portion between the 1 st vertical bank and the 2 nd vertical bank alternately protrudes to one side and the other side in the axial direction; a plurality of banks extending in the axial direction from a side of the connection portion protruding in the axial direction; and a transfer auxiliary unit provided at a distal end of the lateral bank, a contour of the distal end side of the transfer auxiliary unit having a waveform shape in which a curved concave portion and a convex portion are repeatedly formed in a cross section along an outer peripheral surface of the depressed plate, and a 1 st bank structure and a 2 nd bank structure adjacent to each other in the bank structures are 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 may include: a plurality of 1 st horizontal embankments extending from the 1 st connection portion protruding toward one side in the axial direction toward the one side; and a plurality of 2 nd horizontal banks extending from a 2 nd connecting portion protruding toward the other side in the axial direction toward the other side, wherein the 1 st horizontal bank of the 1 st bank structure and the 2 nd horizontal bank of the 2 nd bank structure overlap each other over a range of a predetermined length in the axial direction of the depressed plate.

The bank may include: a plurality of 1 st horizontal dikes extending from the 1 st connecting part protruding to one side in the axial direction to the one side: and a plurality of 2 nd horizontal banks extending from a 2 nd connecting portion protruding toward the other side in the axial direction toward the other side, the 1 st horizontal bank of the 1 st bank structure and the 2 nd horizontal bank of the 2 nd bank structure being provided with a space of a predetermined width in the axial direction of the depressed plate.

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 being provided on an outer peripheral surface thereof with a recess for holding a paste to be transferred onto a transfer target sheet, wherein the recess includes a bank structure having a 1 st longitudinal bank extending obliquely to one side in an axial direction with respect to the circumferential direction and a 2 nd longitudinal bank 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, the longitudinal bank being alternately arranged in the circumferential direction of the intaglio plate, a plurality of transverse banks extending in the axial direction from one side of the connection portion protruding in the axial direction, and a transfer auxiliary portion provided at a tip of the transverse bank, a contour of the tip end side is a wave shape in which curved concave portions and convex portions are repeatedly formed in a cross section along an outer peripheral surface of the depressed plate, and a 1 st bank structure and a 2 nd bank structure adjacent to each other among the bank structures are 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.

Effect of the utility model

The gravure plate and the gravure printing machine can be provided in which the uniformity of the amount of paste in the recess can be further improved in a structure in which the cells adjacent in the transfer direction are partially communicated with each other by providing a gap between the banks.

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; s2, lateral spaces; 1. an intaglio printing press; 2. intaglio printing; 2A, a shaft; 3. a ceramic green sheet; 4. an impression cylinder; 11. a paste supply unit; 12. a conductive paste; 13. a recess; 14. a scraper; 15. a longitudinal dike; 16. a transverse dike; 17, 171, unit; 18, 28, 29, gap; 20. a bank structure; 21. a lateral side embankment; 30, 130, a transfer assist section; 131. a side surface; 151. a connecting portion.

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 multilayer ceramic capacitor as an example of a multilayer 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 by 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.

In the present embodiment, a plurality of bank structures 20 are provided in each recess 13. However, the bank structure 20 of the present invention is not limited to a plurality of bank structures, and may be one bank structure. 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 platen roller 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, a description will be given of one of the bank structures 20 adjacent to each other as a 1 st bank structure 20A and the other 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. Further, the 1 st horizontal bank 16a of the 1 st bank structure 20A and the 2 nd horizontal bank 16B of the 2 nd bank structure 20B overlap each other over a range Y1 of a predetermined length in the axial direction Y shown in fig. 4.

(transfer auxiliary section 30)

A bank-shaped transfer auxiliary unit 30 is provided at the leading end of the 1 st horizontal bank 16a and the leading end of the 2 nd horizontal bank 16b, respectively.

The transfer auxiliary section 30 is a section for ensuring a further starting point of transfer, and at least the width in the circumferential direction (transfer direction X) thereof is wider than the width in the circumferential direction (transfer direction X) of the lateral banks 16. In the embodiment, the cross section of the transfer auxiliary section 30 along the outer peripheral surface of the depressed plate 2 is substantially rectangular in shape having the longitudinal direction in the transfer direction X. The contour of the tip end side is a wave shape in which smooth curved concave portions and convex portions are repeatedly formed in a cross section along the outer peripheral surface.

In the wave shape of the transfer assisting section 30, the curve on the right side in fig. 4 of the transfer direction X, that is, the starting end side, is gentler than the curve on the left side in fig. 4 of the transfer direction X, that is, the terminal end side. That is, the wave shape of the transfer auxiliary section 30 is a shape in which the convex portion is shifted toward the rear end side in the transfer direction X. The curvature of the concave portion and the curvature of the convex portion may be the same.

(gap 18)

A gap 18 is provided between the transfer auxiliary section 30 of the 1 st bank structure 20A and the vertical bank 15 of the 2 nd bank structure 20B.

(side 131)

The recess 13 is rectangular in shape and includes two side surfaces 131 opposed to each other extending in the transfer direction (circumferential direction) X. A side space S2 communicating in the transfer direction (circumferential direction) X is formed between the bank structure 20 and the side surface 131. The side-face-side lateral bank 21 extends from the side face 131 toward the connection portion 151 of the vertical bank 15 of the bank structure 20 and into the side space S2, and the side face 131 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.

(transfer auxiliary section 30)

A transfer auxiliary section 30 is also provided at the tip of the lateral side bank 21. Further, a gap 28 is provided between the transfer auxiliary section 30 and the connecting section 151 of the vertical bank 15 of the bank structure 20.

Further, a gap 29 is provided between the side surface 131 and a transfer auxiliary section 30 provided at the tip of the lateral bank 16 extending from the bank structure 20 to 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 shape of spaces S1, S2)

At this time, 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.

By meandering in this manner, the flow speed of the conductive paste 12 is reduced, and the conductive paste 12 on the transfer starting end side at the time of transfer to the ceramic green sheet 3 is less likely to be blurred.

(effect of the horizontal dike 16)

The internal space S1 is divided into a plurality of cells 17 by the banks 16, and the side space S2 is divided into a plurality of cells 171 by the banks 16 and the side banks 21.

Therefore, the backward flow of the conductive paste 12 can be further inhibited. Further, the lateral banks 16 and the lateral-side lateral banks 21 serve as 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, there is a possibility that the thickness of the transferred conductive paste 12 becomes 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 transfer auxiliary unit 30 of the 1 st bank structure 20A is not connected to the vertical bank 15B of the 2 nd bank structure 20B.

Further, a gap 18 is provided between the transfer auxiliary section 30 and the vertical bank 15B so that the cells 17 adjacent in the transfer direction (circumferential direction) X partially communicate with each other.

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 connection portions 151 of the vertical banks 15 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. Thereby, the conductive paste 12 can flow while filling the divided cells 17 and 171. As a result, the uniformity of the thickness of the transferred conductive paste 12 is improved.

(Effect of wave shape)

Further, by rotating the depressed plate 2, the conductive paste 12 is drawn so as to connect between the ceramic green sheet 3 and the depressed plate 2 when the depressed plate 2 is separated from the ceramic green sheet 3. The filaments of the conductive paste 12 travel in the transfer direction (printing direction) X during printing. In the embodiment, the profile of the transfer auxiliary section 30 on the tip side is a wave shape in which smooth curved recesses and protrusions are repeatedly formed in a cross section along the outer peripheral surface. Therefore, the yarn performs printing while swinging in the axial direction Y while traveling in the transfer direction (printing direction) X. This further improves the uniformity of the printed conductive paste 12.

In the wave shape of the transfer auxiliary section 30, the curve on the leading end side in the transfer direction X is gentler than the curve on the trailing end side in the transfer direction X. Therefore, the conductive paste 12 flows smoothly in the transfer direction X in the

gaps

18, 28, and 29, and the flow is not easily disturbed.

(Effect of transfer auxiliary section 30)

On the other hand, since the

gaps

18, 28, and 29 are provided, the banks 16 and the side banks 21 that become the starting points of the transfer of the conductive paste 12 become shorter by the amount of the gaps.

However, in the embodiment, the transfer auxiliary section 30 is provided at the leading end of the lateral bank 16 and the leading end of the lateral bank 21. The width of the transfer auxiliary section 30 in the transfer direction X is wider than the width of the lateral banks 16 in the transfer direction X. Therefore, the transfer assist section 30 can supplement the transfer start point, and thus the transfer start point can be sufficiently ensured, and the occurrence of blur can be reduced.

(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 recessed 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 of 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 internal electrodes were printed by gravure printing using each depressed plate 2, and whether or not there was any printing blur was observed by an optical microscope. The results 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 examples 1, 2, 3, and 4 do not include the transfer auxiliary unit 30.

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

In comparative example 2, only the vertical bank 15 having the zigzag inclination angle θ of 60 degrees was included.

Comparative example 3 includes banks 16 and zigzag-shaped vertical banks 15 having an inclination angle θ of 60 degrees, and the banks 16 extend to the vertical banks 15 and the cells 17 are not connected to each other.

Comparative example 4 includes the banks 16 and the vertical banks 15 having the zigzag inclination angle θ of 60 degrees, and the cells 17 communicate with each other.

Comparative examples 5 to 12 include zigzag-shaped vertical banks 15, horizontal banks 16, and transfer auxiliary units 30, but the transfer auxiliary units 30 are rectangular without a wave shape. In comparative examples 5 to 12, the inclination angle θ of the vertical bank 15 is different from each other.

Comparative example 5 is a case where θ is 45 degrees, comparative example 6 is a case where θ is 50 degrees, comparative example 7 is a case where θ is 55 degrees, comparative example 8 is a case where θ is 60 degrees, comparative example 9 is a case where θ is 65 degrees, comparative example 10 is a case where θ is 70 degrees, comparative example 11 is a case where θ is 75 degrees, and comparative example 12 is a case where θ is 80 degrees.

(examples)

Examples 1 to 8 include zigzag-shaped vertical banks 15, horizontal banks 16, and transfer auxiliary units 30, and the transfer auxiliary units 30 have a rectangular shape with a wave shape. In examples 1 to 8, the inclination angle θ of the vertical bank 15 is different.

Example 1 is a case where θ is 45 degrees, example 2 is a case where θ is 50 degrees, example 3 is a case where θ is 55 degrees, example 4 is a case where θ is 60 degrees, example 5 is a case where θ is 65 degrees, example 6 is a case where θ is 70 degrees, example 7 is a case where θ is 75 degrees, and example 8 is a case where θ is 80 degrees.

(results of experiments)

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

in the case of comparative example 2, 25 out of 100 had print blur, which was a.DELTA.,

in the case of comparative example 3, 18 out of 100 had print blur, which was Δ,

in comparative example 4, 21 out of 100 had print blur, and the value was Δ.

As is clear from comparison between comparative example 1 and comparative example 2, 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 present.

As is clear from comparison among comparative examples 2, 3, and 4, when the lateral banks 16 are provided, print blur is reduced.

Case where θ is 45 degrees:

the comparative example 5 in which the transfer auxiliary portion 30 is not in the wave shape has 6 print blurs out of 100 and good, and the example 1 in which the transfer auxiliary portion 30 is in the wave shape has two print blurs out of 100 and good.

Case where θ is 50 degrees:

the comparative example 6 in which the transfer auxiliary portion 30 is not in the wave shape has 4 print blurs among 100 pieces and is good, and the example 2 in which the transfer auxiliary portion 30 is in the wave shape has 1 print blur among 100 pieces and is good.

Case where θ is 55 degrees:

comparative example 7 in which the transfer assisting section 30 is not in the wave shape has 5 print blurs out of 100 and good, and example 3 in which the transfer assisting section 30 is in the wave shape has two print blurs out of 100 and good.

Case where θ is 60 degrees:

the comparative example 8 in which the transfer auxiliary section 30 was not in the wave shape had 0 print blur among 100 pieces and was excellent, and the example 4 in which the transfer auxiliary section 30 was in the wave shape had 0 print blur among 100 pieces and was excellent.

Case where θ is 65 degrees:

the comparative example 9 in which the transfer auxiliary portion 30 is not a wave shape has 5 out of 100 pieces of printing blur and is good, and the example 5 in which the transfer auxiliary portion 30 is a wave shape has 3 out of 100 pieces of printing blur and is good.

Case where θ is 70 degrees:

the comparative example 10 in which the transfer auxiliary portion 30 is not in the wave shape has 7 print blurs out of 100 and good, and the example 6 in which the transfer auxiliary portion 30 is in the wave shape has 1 print blur out of 100 and good.

Case where θ is 75 degrees:

comparative example 11 in which the transfer auxiliary section 30 was not in the wave shape had 12 print blurs out of 100 and was Δ, and example 7 in which the transfer auxiliary section 30 was in the wave shape had 12 print blurs out of 100 and was Δ.

Case where θ is 80 degrees:

the comparative example 12 in which the transfer auxiliary section 30 is not in the wave shape had 31 print blurs out of 100 and a value, and the example 8 in which the transfer auxiliary section 30 is in the wave shape had 31 print blurs out of 100 and a value.

Comparative example 8 and example 4 have a common structure with respect to comparative example 4, except that the transfer assisting section 30 is provided. In comparative example 8, 0 print blur was observed among 100, excellent, and 21 print blur was observed among 100, and Δ was observed among 100, whereby it was found that the print blur was reduced when the transfer assisting section 30 was provided.

As is clear from comparison of examples 1 to 8, the inclination angle θ of the vertical bank 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.

In comparison between the example and the comparative example in which θ is the same angle, the number of print blurs in the example in which the transfer auxiliary section 30 is wave-shaped is smaller than or the same as that in the comparative example in which the transfer auxiliary section 30 is not wave-shaped. As can be seen from the above, the mode in which the transfer auxiliary section 30 is formed in a wave shape has an effect of reducing the occurrence of print blur.

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

(modification example)

Fig. 5 is a diagram illustrating a transfer assist unit 130 according to a modification. In the above embodiment, the 1 st horizontal bank 16a and the 2 nd horizontal bank 16b overlap each other over a range Y1 of a predetermined length in the axial direction Y shown in fig. 4. However, the present invention is not limited to this, and as shown in fig. 5, the 1 st horizontal bank 16a and the 2 nd horizontal bank 16B may be arranged so as not to overlap each other, and a space of a predetermined width Y2 in the axial direction Y may be provided between the transfer auxiliary section 30 of the 1 st bank structure 20A and the transfer auxiliary section 30 of the 2 nd bank structure 20B.

This modification also has a structure in which the conductive paste 12 can be stirred, and the uniformity of the conductive paste 12 can be improved.

Claims

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 recess includes a bank structure therein, the bank structure including:

vertical banks in which a 1 st vertical bank extending obliquely to one side in an axial direction with respect to the circumferential direction and a 2 nd vertical bank 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 are alternately arranged in the circumferential direction of the depressed plate, and a connection portion between the 1 st vertical bank and the 2 nd vertical bank alternately protrudes to one side and the other side in the axial direction;

a plurality of banks extending in the axial direction from one side of the connection portion protruding in the axial direction; and

a transfer auxiliary section provided at a leading end of the lateral bank, a contour of the leading end side of the transfer auxiliary section having a waveform shape in which curved concave portions and convex portions are repeatedly formed in a cross section along an outer peripheral surface of the depressed plate,

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 as recited in 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 horizontal dike includes:

a plurality of 1 st horizontal dikes extending from the 1 st connecting part protruding to one side of the axial direction to the one side; and

a plurality of 2 nd banks extending from the 2 nd connecting portion protruding to the other side in the axial direction toward the other side,

the 1 st horizontal bank of the 1 st bank structure and the 2 nd horizontal bank of the 2 nd bank structure overlap each other over a predetermined length in an axial direction of the depressed plate.

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

the horizontal dike includes:

a plurality of 1 st horizontal dikes extending from the 1 st connecting part protruding to one side in the axial direction to the one side: and

the 1 st horizontal bank of the 1 st bank structure and the 2 nd horizontal bank of the 2 nd bank structure are provided with a space of a predetermined width in the axial direction of the depressed plate.

5. An intaglio printing press, comprising:

an intaglio plate having a cylindrical or cylindrical shape and rotatable about an axis, the intaglio plate being provided on an outer peripheral surface thereof with a recess for holding a paste to be transferred onto a transfer target sheet, wherein the recess includes a bank structure having a 1 st longitudinal bank extending obliquely to one side in an axial direction with respect to the circumferential direction and a 2 nd longitudinal bank 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, the longitudinal bank being alternately arranged in the circumferential direction of the intaglio plate, a plurality of transverse banks extending in the axial direction from one side of the connection portion protruding in the axial direction, and a transfer auxiliary portion provided at a tip of the transverse bank, a contour of the tip end side is a wave shape in which curved concave portions and convex portions are repeatedly formed in a cross section along an outer peripheral surface of the depressed plate, and a 1 st bank structure and a 2 nd bank structure adjacent to each other among the bank structures are 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.