CN217455294U - Gravure plate and gravure printing machine - Google Patents
Gravure plate and gravure printing machine Download PDFInfo
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- CN217455294U CN217455294U CN202220334010.9U CN202220334010U CN217455294U CN 217455294 U CN217455294 U CN 217455294U CN 202220334010 U CN202220334010 U CN 202220334010U CN 217455294 U CN217455294 U CN 217455294U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model provides an intaglio and intaglio printing machine, this intaglio can also prevent paste to the skew of rear when guaranteeing the mobility of paste between the adjacent unit. The recessed plate (2) has a cylindrical or columnar shape, and a recessed portion (13) for holding the paste (12) transferred to the sheet (3) to be transferred is provided on the outer peripheral surface of the recessed plate, wherein the recessed portion (13) includes, inside: a vertical dike (15) extending along the circumferential direction of the outer circumferential surface; a horizontal bank (16) having one end connected to the 1 st vertical bank (15) of the vertical banks (15) and the other end extending toward the 2 nd vertical bank (15) side extending adjacent to the 1 st vertical bank (15) and not connected to the 2 nd vertical bank (15); and a blocking section (20) extending from the tip of the other end of the lateral bank (16) toward the leading end side in the transfer direction of the recessed plate (2).
Description
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
However, according to the above-described conventional technique, since the lateral banks have gaps, the paste cannot be completely prevented from shifting rearward.
The utility model aims at providing a can also prevent the gravure and the intaglio printing machine of the skew of paste backward when guaranteeing the mobility of paste between the adjacent unit.
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 provided with a recessed portion on an outer peripheral surface thereof for holding a paste transferred onto a transfer target sheet, the intaglio plate including, in the recessed portion: a vertical bank extending in a circumferential direction of the outer circumferential surface; a horizontal bank having one end connected to a 1 st longitudinal bank among the longitudinal banks and the other end extending toward a 2 nd longitudinal bank side extending adjacent to the 1 st longitudinal bank and not connected to the 2 nd longitudinal bank; and a stopper portion extending from a distal end of the other end of the lateral bank toward a leading end side in a transfer direction of the depressed plate.
The length of the blocking portion in the circumferential direction may be less than 90% of the distance between the banks.
The length of the blocking portion in the circumferential direction may be 60% or more and 75% or less of the distance between the banks.
The bank may include: a 1 st horizontal bank having one end connected to the 1 st longitudinal bank and the other end extending to the 2 nd longitudinal bank side and not connected to the 2 nd longitudinal bank; and a 2 nd bank having one end connected to the 2 nd longitudinal bank and the other end extending toward the 1 st longitudinal bank and not connected to the 1 st longitudinal bank, wherein the blocking portion includes a 1 st blocking portion provided in the 1 st bank and a 2 nd blocking portion provided in the 2 nd transverse bank, and the 1 st transverse bank and the 2 nd transverse bank overlap each other in an axial direction of the depressed plate over a predetermined length.
The bank may include: a 1 st horizontal bank having one end connected to the 1 st vertical bank and the other end extending to the 2 nd vertical bank side and not connected to the 2 nd vertical bank; and a 2 nd bank having one end connected to the 2 nd longitudinal bank and the other end extending toward the 1 st longitudinal bank and not connected to the 1 st longitudinal bank, wherein the intercepting part includes a 1 st intercepting part provided to the 1 st bank and a 2 nd intercepting part provided to the 2 nd transverse bank, and a space having a predetermined width is provided between the 1 st intercepting part and the 2 nd intercepting part in an axial direction of the intaglio plate.
In order to solve the above problem, the invention according to claim 2 provides an intaglio printing press, wherein the intaglio printing press includes: an intaglio plate having a cylindrical or columnar shape, the intaglio plate having a recessed portion provided on an outer peripheral surface thereof for holding a paste transferred onto a sheet to be transferred, the intaglio plate including, inside the recessed portion: a vertical bank extending in a circumferential direction of the outer circumferential surface; a horizontal bank having one end connected to a 1 st longitudinal bank among the longitudinal banks and the other end extending toward a 2 nd longitudinal bank side extending adjacent to the 1 st longitudinal bank and not connected to the 2 nd longitudinal bank; and a stopper portion extending from a distal end of the other end of the lateral bank toward a leading end side in a transfer direction of the depressed plate; 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
According to the present invention, an intaglio and an intaglio printing press can be provided which can prevent the paste from shifting rearward while ensuring the fluidity of the paste between adjacent cells.
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 a partial enlarged view of the inner region.
Fig. 6 is a partially enlarged view of a modification of the inner region.
Description of the reference numerals
1. An intaglio printing press; 2. intaglio printing; 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. 15D, 15Da, 15Db, longitudinal dike; 16. 16D, 16Da, 16Db and a transverse dike; 17. 17D, a unit; 18. 18a, 18b, gap; 20. 20a, 20b, a stop.
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 diagram 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 X (circumferential direction and rotational direction) 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 X of the depressed 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 depressed plate 2.
(concave part 13)
Fig. 4 is an enlarged view of 1 recess 13. The concave portions 13 are formed by etching, engraving, or the like using a photomask blank, and the plurality of concave portions 13 have the same shape and are formed to be arranged at constant intervals in the axial direction Y and the transfer direction X of the depressed plate 2. Each of the recesses 13 is provided with a vertical bank 15 extending in the transfer direction X and a horizontal bank 16 extending in an axial direction Y perpendicular to the vertical bank 15. The details of the vertical banks 15 and the horizontal banks 16 will be described later.
(paste supply part 11)
Referring back to fig. 1, the paste supply unit 11 is a storage 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 of the recessed portion 13 of the depressed plate 2 in the longitudinal direction, which is the transfer direction X, is smaller than the nip width N.
(longitudinal dike 15 and transverse dike 16)
Next, the vertical banks 15 and the horizontal banks 16 provided in the concave portion 13 will be described in detail.
The transfer direction X shown in fig. 4 is a direction opposite to the rotation direction indicated by the 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 of the recesses 13 is provided with a plurality of parallel vertical banks 15(15A, 15B, 15D) extending in the transfer direction X, and a plurality of parallel horizontal banks 16(16A, 16B, 16C, 16D) extending in a direction perpendicular to the vertical banks 15. The inside of the recess 13 is divided into a plurality of cells 17(17A, 17B, 17C, 17D) by the vertical banks 15 and the horizontal banks 16.
In the embodiment, the thickness and structure of the vertical banks 15 and the horizontal banks 16 and the size of the cells 17 are different between the edge region and the inner region of the recess 13.
(transfer printing terminal edge part region)
The widths of the vertical banks 15A and the horizontal banks 16A in the edge area on the transfer terminal side of the concave portion 13 are larger than the widths of the vertical banks 15D and the horizontal banks 16D in the internal area, and thus the size of the cells 17A in the edge area on the transfer terminal side is smaller than the size of the cells 17D in the central portion.
(axial edge region)
The widths of the vertical banks 15B and the horizontal banks 16B in the edge regions on both sides of the recess 13 in the axial direction Y are larger than the widths of the vertical banks 15D and the horizontal banks 16D in the inner region. The interval in the transfer direction X between the lateral banks 16B extending from the longitudinal bank 15B at the end in the axial direction Y toward the outer peripheral wall 13B of the recess 13 is half the interval in the transfer direction X between the lateral banks 16D in the inner region. Therefore, the size of the cell 17B in the edge region in the axial direction is smaller than the size of the cell 17D in the central portion.
(transfer origin side)
Two start end grooves extending in the axial direction Y, i.e., a start end groove 13F and a start end groove 13E, are provided at positions closer to the transfer start end side than the concave portion 13, independently of the concave portion 13.
Further, the lateral banks 16C of the recessed portion 13 closest to the transfer start end side extend continuously in the axial direction Y, and the interval between the lateral banks 16C and the outer peripheral wall 13C of the recessed portion 13 is narrower than the interval between the vertical banks 15D in the inner region. Therefore, the size of the cell 17C is smaller than that of the cell 17D in the center portion.
(contour groove 13G)
In the edge area on the transfer terminal side, the outer peripheral wall 13A of the recess 13 is not connected to and separated from the vertical bank 15A and the horizontal bank 16A. In the edge portions on both sides in the axial direction Y, the outer peripheral wall 13B of the recess 13 is not connected to but separated from the horizontal dam 16B. That is, the contour groove 13G is provided along 3 sides of the recess 13 excluding the side on the transfer start end side.
(inner region)
Next, the vertical banks 15D and the horizontal banks 16D in the inner region of the recess 13 excluding the edge region will be described. Fig. 5 is a partial enlarged view of the inner region. Hereinafter, one of the vertical banks 15D adjacent to each other is referred to as a 1 st vertical bank 15Da and the other vertical bank 15D is referred to as a 2 nd vertical bank 15Db as necessary. Note that, one of the banks 16D adjacent to each other is the 1 st bank 16Da, and the other bank 16D is the 2 nd bank 16 Db.
Note that, when it is not necessary to distinguish between the 1 st vertical bank 15Da and the 2 nd vertical bank 15Db, the vertical banks 15D will be described together, and when it is not necessary to distinguish between the 1 st horizontal bank 16Da and the 2 nd horizontal bank 16Db, the horizontal bank 16D will be described together.
(Dike structure)
The plurality of horizontal banks 16 arranged in the space extending in the transfer direction X between the 1 st vertical bank 15Da and the 2 nd vertical bank 15Db are parallel to each other, and divide the space into a plurality of cells 17D.
The 1 st horizontal bank 16Da is connected at one end to the 1 st vertical bank 15Da, and at the other end, extends toward the 2 nd vertical bank 15Db side but is not connected to the 2 nd vertical bank 15 Db. The 2 nd horizontal bank 16Db has one end connected to the 2 nd vertical bank 15Db and the other end extending toward the 1 st vertical bank 15Da but not connected to the 1 st vertical bank 15 Da.
The 1 st horizontal bank 16Da and the 2 nd horizontal bank 16Db are alternately arranged in the transfer direction X and also alternately arranged in the axial direction Y.
The 1 st horizontal bank 16Da and the 2 nd horizontal bank 16Db extend from the same position in the transfer direction X of the vertical bank 15D to one side and the other side in the axial direction Y, respectively, and the 1 st horizontal bank 16Da and the 2 nd horizontal bank 16Db connected to the 1 st horizontal bank 16Da cross the vertical bank 15D as 1 horizontal bank 16D.
(interception part 20)
In the embodiment, a 1 st dam 20a in a bank shape is provided at the top end of the 1 st horizontal bank 16Da, and a 2 nd dam 20b in a bank shape is provided at the top end of the 2 nd horizontal bank 16 Db.
The 1 st block portion 20a and the 2 nd block portion 20b have the same shape, and the 1 st block portion 20a and the 2 nd block portion 20b will be collectively described as the block portion 20 without distinguishing them. The blocking portion 20 is a portion that blocks the flow of the conductive paste 12.
In the embodiment, the block portion 20 extends substantially perpendicular to the lateral banks 16 from the distal ends of the other ends of the lateral banks 16 toward the leading end side of the depressed plate 2 in the transfer direction X. In the embodiment, the stopper portion 20 has the same width as the horizontal bank 16D, but is not limited thereto and may have a different width.
The length of the stopper 20 in the transfer direction (circumferential direction) X is preferably 50% or more, more preferably 60% or more and 75% or less, of the distance between the lateral banks 16D in the transfer direction (circumferential direction) X, that is, the distance between the lateral banks 16Da and the lateral banks 16Db in the transfer direction (circumferential direction) X.
Further, the 1 st horizontal bank 16Da and the 2 nd horizontal bank 16Db overlap each other over a predetermined length range Y1 in the axial direction Y.
(gap 18)
The 1 st gap 18a and the 2 nd gap 18b are different in position in the axial direction Y, and the 1 st gap 18a and the 2 nd gap 18b are alternately arranged in the transfer direction X. In other words, the 1 st and 2 nd gaps 18a and 18b are provided at portions of two diagonally opposite corners of each cell 17D, respectively. The cells 17D adjacent in the transfer direction X are communicated by the 1 st gap 18a and the 2 nd gap 18b described above.
In the embodiment, the 1 st and 2 nd gaps 18a and 18b have the same width in the axial direction Y. Hereinafter, the 1 st gap 18a and the 2 nd gap 18b will be collectively described as the gap 18 without distinguishing them.
(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, when the transfer start end portion of the concave portion 13 moves to the contact position, the horizontal position of the inside of the concave portion 13 on the front side in the transfer direction X is higher than the horizontal position on the rear side in the transfer direction X. Therefore, the conductive paste 12 held in the concave portion 13 tends to flow toward the rear side in the transfer direction X.
However, in the embodiment, the inside of the concave portion 13 is divided into a plurality of cells 17 by vertical banks 15 extending in the transfer direction X and horizontal banks 16 extending in a direction orthogonal to the transfer direction X. Therefore, the horizontal banks 16 can prevent the backward flow of the conductive paste 12. Then, the horizontal banks 16 respectively serve as starting points from which the conductive paste 12 is transferred to the ceramic green sheet 3, and the occurrence of blur in the transferred conductive paste 12 is reduced.
Here, if the inside of the concave portion 13 is completely divided into the plurality of cells 17 independent of each other, the conductive paste 12 does not flow between the adjacent cells 17 at the time of transfer, and when the amount of the conductive paste 12 in the concave portion 13 is not uniform, the thickness of the transferred conductive paste 12 may become non-uniform.
However, in the embodiment, the cells 17 adjacent to each other in the transfer direction X are partially communicated with each other by providing the horizontal banks 16 with the gaps 18. Therefore, the fluidity of the conductive paste 12 is increased between the cells 17 adjacent in the transfer direction X. Thereby, the conductive paste 12 can flow while filling the cells 17 divided by the horizontal banks 16. As a result, the uniformity of the thickness of the transferred conductive paste 12 is improved.
Further, by the rotation of the depressed plate 2, the conductive paste 12 in the concave portion 13 attempts to flow from one cell 17 to the next cell 17 on the rear end side in the transfer direction X through the gap 18.
At this time, the cell 17 is surrounded by the bank 16 and the stopper 20. Therefore, as shown by the arrows in the figure, the conductive paste 12 is held in the space surrounded by the banks 16 and the stopper 20, and the remaining amount flows out to the next cell 17 through the gap 18. This makes it possible to hold sufficient conductive paste 12 in each cell 17 even when the depressed plate 2 rotates, thereby preventing the conductive paste 12 from shifting rearward. Therefore, the occurrence of blur when the conductive paste 12 is transferred to the ceramic green sheet 3 can be further reduced.
Further, since the gap 18 is provided in the lateral bank 16, the lateral bank 16 which becomes a starting point of transfer of the conductive paste 12 becomes shorter by a corresponding amount.
However, in the embodiment, the stopper 20 is provided at the top end of the horizontal bank 16. Therefore, the transfer start point can be supplemented by the stopper portion 20, and therefore, the transfer start point can be sufficiently ensured, and the occurrence of blur can be reduced.
(Experimental example)
Next, intaglio plates 2 having different bank shapes in the inner regions of the plurality of concave portions 13 were prepared, 100 times of internal electrodes were printed by intaglio printing using each intaglio 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, the case where print blur occurred 10 times or more out of 100 times was judged as "Δ", 1 time or more and less than 10 times was judged as "good", and 0 time was judged as "excellent". In addition, the case where the print blur occurred 40 times or more out of 100 times was determined to be x, but it does not exist in the embodiment.
| Interception part | Blur in printing | Determination | |
| Comparative example 1 | Is free of | 16/100 | △ |
| Example 1 | 40 percent between the |
2/100 | ○ |
| Example 2 | 50 percent of the transverse dikes | 1/100 | ○ |
| Example 3 | 55 percent between the transverse dikes | 1/100 | ○ |
| Example 4 | 60 percent between the transverse dikes | 0/100 | ◎ |
| Example 5 | 65 percent between the transverse dikes | 0/100 | ◎ |
| Example 6 | 70 percent between the transverse dikes | 0/100 | ◎ |
| Example 7 | 75 percent of the transverse dikes | 0/100 | ◎ |
| Example 8 | 80 percent of the transverse dikes | 5/100 | ○ |
| Example 9 | 90 percent of the transverse dikes | 32/100 | △ |
When the length of the stopper 20 is 90% or more of the distance between the banks, the fluidity of the conductive paste 12 is extremely reduced, and print blur increases.
Comparative example 1 includes only the vertical banks 15D and the horizontal banks 16D without the dam portions 20.
In example 1, the length of the block portion 20 in the transfer direction (circumferential direction) X is 40% of the distance between the lateral banks 16D in the transfer direction (circumferential direction) X, that is, the distance between the lateral banks 16Da and the lateral bank 16Db in the transfer direction (circumferential direction) X.
In example 2, the length of the block portion 20 in the transfer direction (circumferential direction) X is 50% of the distance between the lateral banks 16D in the transfer direction (circumferential direction) X.
In example 3, the length of the block portion 20 in the transfer direction (circumferential direction) X is 55% of the distance between the lateral banks 16D in the transfer direction (circumferential direction) X.
In example 4, the length of the block portion 20 in the transfer direction (circumferential direction) X is 60% of the distance between the lateral banks 16D in the transfer direction (circumferential direction) X.
In example 5, the length of the block portion 20 in the transfer direction (circumferential direction) X was 65% of the distance between the lateral banks 16D in the transfer direction (circumferential direction) X.
In example 6, the length of the block portion 20 in the transfer direction (circumferential direction) X is 70% of the distance between the lateral banks 16D in the transfer direction (circumferential direction) X.
In example 7, the length of the block portion 20 in the transfer direction (circumferential direction) X was 75% of the distance between the lateral banks 16D in the transfer direction (circumferential direction) X.
In example 8, the length of the block portion 20 in the transfer direction (circumferential direction) X was 80% of the distance between the lateral banks 16D in the transfer direction (circumferential direction) X.
In example 9, the length of the block portion 20 in the transfer direction (circumferential direction) X was 90% of the distance between the lateral banks 16D in the transfer direction (circumferential direction) X.
As shown in the above table, in the case of comparative example 1 including only the vertical banks 15D and the horizontal banks 16D without the block portions 20, the print blur was a little, and the print blur occurred in 16 out of 100 times.
On the other hand, in example 1 in which the length of the transfer direction (circumferential direction) X of the block portion 20 is 40% of the distance in the transfer direction (circumferential direction) X between the lateral banks 16D, the print blur is good at two times in 100 times, and in example 2 in which the length is 50% and example 3 in which the length is good at 55%, the print blur is good at 1 time in 100 times, and the print blur can be considerably reduced.
In the case of example 4 in which the length of the block portion 20 in the transfer direction (circumferential direction) X was 60% of the distance between the lateral banks 16D in the transfer direction (circumferential direction) X, example 5 in 65%, example 6 in 70%, and example 7 in 75%, the print blur was very good and no print blur was observed in 0 out of 100.
Further, in the case of example 8 in which the length of the transfer direction (circumferential direction) X of the block portion 20 is 80% of the distance in the transfer direction (circumferential direction) X between the lateral banks 16D, the print blur was found 5 out of 100 times, and the quality was good, and the print blur could be considerably reduced.
In example 9 in which the length of the block portion 20 in the transfer direction (circumferential direction) X was 90% of the distance between the lateral banks 16D in the transfer direction (circumferential direction) X, the print blur occurred 32 times out of 100 times, and was Δ, and a slight print blur occurred.
As described above, the length of the blocking portion 20 in the transfer direction (circumferential direction) X is preferably 50% or more, more preferably 60% or more and 75% or less, of the distance between the lateral banks 16D in the transfer direction (circumferential direction) X, that is, the distance between the lateral banks 16Da and the lateral banks 16Db in the transfer direction (circumferential direction) X.
In the embodiment, the dimension L of the concave portion 13 of the depressed plate 2 in the transfer direction X 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 the transfer of the conductive paste 12 to the ceramic green sheet 3 can be further improved.
Two start end grooves extending in the axial direction Y, i.e., a start end groove 13F and a start end groove 13E, are provided on the transfer start end side of the concave portion 13 independently of the unit 17.
The above-described leading end groove 13F and leading end groove 13E can further reduce the occurrence of blurring and insufficient thickness of the conductive paste 12 on the transfer leading end side.
Further, on both sides in the axial direction Y and on the transfer terminal side, the outer peripheral wall 13B of the recess 13 is not connected to the vertical bank 15 and the horizontal bank 16, but is provided with a contour groove 13G. That is, the contour groove 13G is provided along 3 sides of the recess 13 excluding the side on the transfer starting end side.
This can improve the linearity of the profile of the conductive paste 12.
In general, when the conductive paste 12 is transferred to the ceramic green sheet 3 by gravure printing, a so-called "saddle phenomenon" (japanese: サドル phenomenon) in which the peripheral edge portion of the transferred conductive paste 12 is thickened tends to occur. When a multilayer ceramic capacitor is manufactured using the conductive paste 12 in which the "saddle phenomenon" occurs, short-circuit defects and structural defects may be caused.
In the depressed plate 2 of the present embodiment, since the cells 17(17A, 17B, 17C) located in the edge regions on both sides of the recess 13 in the axial direction Y are smaller than the cells 17(17D) located in the inner region of the recess 13, the "saddle phenomenon" is less likely to occur.
(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 electrode is 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.
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. 6 is a partially enlarged view of a modification of the inner region. In the above embodiment, the 1 st horizontal bank 16Da and the 2 nd horizontal bank 16Db overlap each other over a range Y1 of a predetermined length in the axial direction Y. However, the present invention is not limited to this, and as shown in fig. 6, the 1 st horizontal bank 16Da and the 2 nd horizontal bank 16Db may be provided with a space of a predetermined width Y2 in the axial direction Y between the 1 st block portion 20a and the 2 nd block portion 20b without overlapping in the axial direction Y.
In the case of the modification shown in fig. 6, as shown by the arrows in the drawing, sufficient conductive paste 12 is held in each cell 17D even when the depressed plate 2 rotates, and the rearward displacement of the conductive paste 12 is prevented, so that the occurrence of blur when the conductive paste 12 is transferred to the ceramic green sheet 3 can be further reduced.
Claims (6)
1. An intaglio plate having a cylindrical or columnar shape and provided with a concave portion on the outer peripheral surface thereof for holding a paste transferred onto a sheet to be transferred,
the inside of the recess includes:
a vertical bank extending in a circumferential direction of the outer circumferential surface;
a transverse bank having one end connected to a 1 st longitudinal bank among the longitudinal banks and the other end extending to a 2 nd longitudinal bank side adjacent to the 1 st longitudinal bank and not connected to the 2 nd longitudinal bank; and
and a stopper portion extending from a distal end of the other end of the lateral bank toward a leading end side in a transfer direction of the depressed plate.
2. The intaglio plate according to claim 1,
the length of the interception portion in the circumferential direction is less than 90% of the distance between the banks.
3. Intaglio plate according to claim 1 or 2, characterized in that,
the length of the blocking portion in the circumferential direction is 60% to 75% of the distance between the banks.
4. Intaglio plate according to claim 1 or 2, characterized in that,
the transverse dike comprises: a 1 st horizontal bank having one end connected to the 1 st vertical bank and the other end extending to the 2 nd vertical bank side and not connected to the 2 nd vertical bank; and a 2 nd horizontal bank having one end connected to the 2 nd vertical bank and the other end extending to the 1 st vertical bank side and not connected to the 1 st vertical bank,
the interception part comprises a 1 st interception part arranged on the 1 st transverse embankment and a 2 nd interception part arranged on the 2 nd transverse embankment,
the 1 st and 2 nd banks overlap in the axial direction of the depressed plate over a predetermined length.
5. Intaglio plate according to claim 1 or 2, characterized in that,
the horizontal dike includes: a 1 st horizontal bank having one end connected to the 1 st vertical bank and the other end extending to the 2 nd vertical bank side and not connected to the 2 nd vertical bank; and a 2 nd horizontal bank having one end connected to the 2 nd vertical bank and the other end extending to the 1 st vertical bank side and not connected to the 1 st vertical bank,
the interception part comprises a 1 st interception part arranged on the 1 st transverse embankment and a 2 nd interception part arranged on the 2 nd transverse embankment,
an interval of a predetermined width is provided between the 1 st block portion and the 2 nd block portion in an axial direction of the depressed plate.
6. An intaglio printing press, characterized in that,
the gravure printing machine is provided with:
an intaglio plate having a cylindrical or columnar shape, the intaglio plate having a recessed portion on an outer peripheral surface thereof for holding a paste transferred to a sheet to be transferred, the intaglio plate including, inside the recessed portion: a vertical bank extending in a circumferential direction of the outer circumferential surface; a horizontal bank having one end connected to a 1 st longitudinal bank among the longitudinal banks and the other end extending to a 2 nd longitudinal bank side extending adjacent to the 1 st longitudinal bank and not connected to the 2 nd longitudinal bank; and a stopper portion extending from a distal end of the other end of the lateral bank toward a leading end side in a transfer direction of the depressed plate;
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.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021026739A JP2022128287A (en) | 2021-02-22 | 2021-02-22 | Gravure plate, gravure printer and manufacturing method of laminate type electronic component |
| JP2021-026739 | 2021-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217455294U true CN217455294U (en) | 2022-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220334010.9U Active CN217455294U (en) | 2021-02-22 | 2022-02-18 | Gravure plate and gravure printing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2022128287A (en) |
| CN (1) | CN217455294U (en) |
-
2021
- 2021-02-22 JP JP2021026739A patent/JP2022128287A/en active Pending
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2022
- 2022-02-18 CN CN202220334010.9U patent/CN217455294U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022128287A (en) | 2022-09-01 |
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