JP2014111329A - Gravure roll, gravure printing machine, and electronic circuit pattern printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gravure roll capable of printing paste according to a size of a printed target matter by adjusting a circumferential length of a gravure printing plate.SOLUTION: A gravure roll 2 for printing paste 12 onto a printed target matter 3 includes: a cylindrical base material unit 21 that has a hollow portion 21a in a radially central portion, having a through-hole 21b opening in an outer circumferential surface and coupling the hollow portion 21a to the outer circumferential surface, a fluid being introduced into the hollow portion 21a; a stretchable layer 23 provided circumferentially so as to cover the outer circumferential surface of the base material unit 21 with the stretchable layer 23 and stretchable radially; and a gravure printing plate 24 provided circumferentially to cover an outer circumferential surface of the stretchable layer 23. The stretchable layer 23 includes a porous body 23a and an elastic body 24b provided to cover the porous body 23a, and stretches radially as the fluid is supplied to the porous body 23a or discharged from the porous body 23a via the through-hole 21b.

Description

  The present invention relates to a gravure roll provided in a gravure printing machine for printing a paste on a substrate, a gravure printing machine provided with the gravure roll, and a method for printing an electronic circuit pattern printed using the gravure printing machine. .

  In general, as a method of printing an electronic circuit pattern with a paste on a circuit board, a screen printing method is adopted in that the same electronic circuit pattern can be produced in large quantities. An example of such a method is disclosed in Patent Document 1.

JP 2008-117927 A

  However, in the screen printing method, the circuit board to be printed is displaced from the dimensions of the screen plate due to variations in the dimensions in the manufacturing process, or the circuit board is subjected to a thermal history, so that the dimensions of the circuit board are increased. If it shrinks or shrinks, it is difficult to print the electronic circuit pattern on the circuit board with paste according to the dimensions of the circuit board, and the actual printed electronic circuit pattern and the designed electronic circuit pattern will be misaligned. Occurs, and the printing accuracy of the electronic circuit pattern on the circuit board is lowered.

  The present invention has been made in view of the above-described problems, and its purpose is to paste in accordance with the size of the substrate by adjusting the circumferential length of the gravure printing plate even when the size of the substrate is different. Is to provide a gravure roll and a gravure printing machine.

  The gravure roll of the present invention is a gravure roll provided in a gravure printing machine for printing a paste on a printing material by gravure printing, and has a hollow portion at a central portion in a radial direction and is opened to an outer peripheral surface to A cylindrical base material part that has a through-hole connecting the hollow part and fluid is introduced into the hollow part, and is provided in the circumferential direction so as to cover the outer peripheral surface of the base material part, and expands and contracts in the radial direction. An elastic layer, and a gravure printing plate provided in a circumferential direction so as to cover an outer peripheral surface of the elastic layer, and the elastic layer includes a porous body and an elastic body provided so as to cover the porous body; And extending and contracting in the radial direction by supplying the fluid to the porous body via the through-hole or discharging the fluid from the porous body.

Further, the gravure roll of the present invention is a gravure roll provided in a gravure printing machine for printing a paste by gravure printing on a printed material, and has a hollow portion in a central portion in a radial direction and is opened on an outer peripheral surface. A cylindrical base material portion having a through hole connecting the hollow portion, and a flow passage provided through the hollow portion in the longitudinal direction of the base material portion through which fluid flows, and A fluid circulation pipe having a flow passage communicating with the hollow portion; a radially extending and contracting elastic layer provided to cover the outer peripheral surface of the base material portion; and an outer peripheral surface of the elastic layer. A gravure printing plate provided in the circumferential direction so as to cover, and the stretchable layer is composed of a porous body and an elastic body provided so as to cover the porous body, and the porous material via the through hole Supplying the fluid to the body or the It is characterized in that stretch by the discharge of the fluid from the porous body in a radial direction.

  According to the gravure roll of the present invention, it is possible to print a paste in accordance with the size of the printing material by adjusting the circumferential length of the gravure printing plate even when the printing material has different dimensions.

It is a schematic side view of the gravure printing machine which concerns on 1st Embodiment. It is sectional drawing which shows the state in which the paste film was formed on the to-be-printed material with the gravure printing machine shown in FIG. (A) is sectional drawing of the gravure roll which cut | disconnected the gravure roll shown in FIG. 1 along the longitudinal direction, (b) is sectional drawing in the BB line of the gravure roll shown to (a). It is the upper side figure and sectional drawing of the base material part of the gravure roll shown in FIG. It is an enlarged view of the A section of the gravure roll shown in FIG. It is explanatory drawing explaining the state which the elastic layer shown in FIG. 5 expands / contracts to radial direction. 5A is a plan view of the porous body shown in FIG. 5, FIG. 5B is a cross-sectional view of the porous body shown in FIG. 5A taken along lines YY and ZZ, and FIG. It is explanatory drawing explaining the flow of the fluid in a body. It is explanatory drawing explaining the state which prints a paste on to-be-printed material using the gravure printing machine shown in FIG. It is sectional drawing of the elastic layer which concerns on 2nd Embodiment. It is explanatory drawing explaining the state which the elastic layer body shown in FIG. 9 expands-contracts to radial direction. It is sectional drawing of the elastic layer which shows the other example of the elastic layer shown in FIG. Sectional drawing of the gravure roll which cut | disconnected the gravure roll which concerns on 3rd Embodiment along the longitudinal direction, (b) is sectional drawing in CC line of the gravure roll shown to (a). Sectional drawing of the gravure roll which cut | disconnected the gravure roll which concerns on 4th Embodiment along the longitudinal direction, (b) is sectional drawing in the DD line | wire of the gravure roll shown to (a). It is sectional drawing of the electronic component manufactured by the gravure printing machine shown in FIG.

<Embodiment 1>
Hereinafter, a gravure printing machine 1 and a gravure roll 2 according to a first embodiment (referred to as Embodiment 1) of the present invention will be described with reference to FIGS. FIG. 1 is a schematic side view of the gravure printing machine 1 according to Embodiment 1 of the present invention as viewed from the side.

  The gravure printing machine 1 is used, for example, for printing a predetermined electronic circuit pattern on a printed material such as a circuit board.

  The gravure printing machine 1 according to Embodiment 1 has a configuration as shown in FIG. 1, and includes a gravure roll 2 and an impression cylinder 4 that faces the gravure roll 2 with a print 3 interposed therebetween. . The gravure roll 2 and the impression cylinder 4 are each rotated in the direction of the arrow, whereby the substrate 3 adsorbed on the carrier 10 is conveyed in the direction of the arrow.

Further, as shown in FIGS. 1 and 2, the printing material 3 is in a state of being adsorbed by the carrier 10, and the gravure printing machine 1 causes the printing material 3 to pass between the gravure roll 2 and the impression cylinder 4. At this time, the paste 12 is printed on the substrate 3 by gravure printing. FIG. 2 shows a state in which the paste 12 is printed on the substrate 3 and the paste film 9 is provided.

  The substrate 3 is, for example, a circuit board or a ceramic green sheet. The circuit board is, for example, a board having glass epoxy or ceramic as an insulating layer. The substrate 3 is not particularly limited as long as the paste 12 can be printed by the gravure printing machine 1.

  The gravure printing machine 1 also includes, for example, a measurement camera 5 for acquiring position information of a predetermined measurement point of the substrate 3, and deformation of the substrate 3 based on the position information obtained by the measurement camera 5. A deformation amount calculation unit 6 for calculating the amount and a fluid amount control unit 7 for controlling the amount of fluid introduced into the hollow portion 21a according to the deformation amount of the substrate 3 are provided. Details of these will be described later.

  As shown in FIG. 3, the gravure roll 2 includes a base material portion 21, a fluid circulation pipe 22, an elastic layer 23, and a gravure printing plate 24.

  Further, the gravure roll 2 is provided with side plates 2a on both side surfaces so as to sandwich the base material portion 21, and a fluid circulation pipe 22 is provided so as to penetrate the central portion of the side plates 2a on both sides. Yes.

  As shown in FIG. 3, the base material portion 21 has a cylindrical shape, and has a hollow portion 21 a in the central portion in the radial direction, and has a through hole 21 b that opens to the outer peripheral surface and connects the hollow portion 21 a. Yes. Further, in the base material portion 21, a fluid is introduced into the hollow portion 21 a from the outside through the fluid circulation pipe 22.

  The fluid is a liquid or a gas, and the liquid is, for example, water or silicone oil, and the gas is, for example, air or nitrogen gas. In FIG. 3A, the flow of the fluid inside the base material portion 21 is schematically shown by arrows.

  Moreover, the base material part 21 consists of metal materials or resin materials, such as aluminum, iron, or copper, for example. In addition, the outer peripheral surface of the base material portion 21 may be polished or mirror-finished to improve adhesion with the stretchable layer 23. Moreover, although the outer diameter (diameter) of the base material part 21 is suitably set according to the dimension of the to-be-printed material 3, etc., they are 50 (mm)-200 (mm), for example.

  As shown in FIG. 4, the base material portion 21 has a plurality of through holes 21 b, and the through holes 21 b are irregularly arranged over the outer periphery of the base material portion 21. In FIG. 4, the through holes 21 b are irregularly arranged in the circumferential direction of the base material portion 21, but are not limited thereto, and may be regularly arranged. Moreover, although the shape of the opening part of the outer peripheral surface of the through-hole 21b is circular shape in FIG. 4, it is not limited to this. In the case of a circular shape, the size of the opening of the through hole 21b is 0.1 (mm) to 10 (mm), for example.

  As shown in FIG. 3, the fluid flow pipe 22 is provided through the hollow portion 21 a of the base material portion 21 in the longitudinal direction of the base material portion 21. The fluid circulation pipe 22 has a flow passage 22a through which fluid flows in the center thereof, and the flow passage 22a communicates with the hollow portion 21a.

  Since the fluid flow pipe 22 communicates with the flow passage 22a and the hollow portion 21a, the fluid from the outside flows into the hollow portion 21a of the base material portion 21 through the flow passage 22a, or the flow passage 22a passes through the flow passage 22a. Thus, the fluid from the hollow portion 21a of the base material portion 21 can be discharged to the outside.

Further, the gravure roll 2 has a structure in which the fluid circulation pipe 22 penetrates through the hollow portion 21a and is fixed through the central portions of the side plates 2a on both sides, as shown in FIG. In the structure of the gravure roll 2, the fluid circulation pipe 22 has a function as a rotation axis of the gravure roll 2. By adopting such a structure, the gravure roll 2 can simplify the structure of the gravure roll 2 because the fluid flow pipe 22 can also serve as a rotating shaft.

  The fluid circulation pipe 22 is connected to a fluid control unit 7 provided outside via a rotary joint. The rotary joint is capable of introducing a fluid into the rotating gravure roll 2. Therefore, since the gravure printing machine 1 can introduce a fluid from the outside even when the gravure roll 2 is rotated by using the rotary joint, the paste 12 is continuously applied on the substrate 3 without interrupting printing. Can be printed.

  The stretchable layer 23 is provided in the circumferential direction so as to cover the outer peripheral surface of the base material portion 21. The stretchable layer 23 includes a porous body 23a and an elastic body 23b provided so as to cover the porous body 23a, and supplies fluid to the porous body 23a through the through holes 21b or from the porous body 23a. It expands and contracts in the radial direction by discharging the fluid. Therefore, the outer periphery of the stretchable layer 23 expands or contracts by expanding and contracting in the radial direction.

  In other words, the stretchable layer 23 expands and contracts in the radial direction by supplying the fluid to the porous body 23a and discharging the fluid from the porous body 23a by the porous body 23a and the elastic body 23b functioning together. To do.

  The elastic body 23b has a function of suppressing the fluid introduced into the porous body 23a from leaking to the gravure printing plate 24 side. The elastic body 23b is, for example, a rubber body such as silicone rubber, fluorine rubber, or natural rubber, and preferably has stretchability, flexibility, elastic restoring force, and the like. The elastic body 23b is provided, for example, by winding a rubber body around the porous body 23a or fitting an annular rubber body into the porous body 23a.

  The gravure roll 2 is provided in the circumferential direction so that the gravure printing plate 24 covers the outer peripheral surface of the stretchable layer 23. Further, the gravure printing plate 24 is made of a resin having flexibility and has flexibility, so that it can cope with expansion and contraction in the radial direction of the stretchable layer 23. Accordingly, the outer circumference of the gravure printing plate 24 is adjusted by the expansion and contraction of the expansion / contraction layer 23 because the expansion / contraction layer 23 expands / contracts according to the expansion / contraction in the radial direction.

  Moreover, since the gravure printing plate 24 has flexibility, the gravure printing machine 1 is applicable not only to a hard substrate 3 such as a circuit board but also to a substrate 3 having irregularities on the surface. can do.

  In the gravure printing plate 24, a recess 24a corresponding to an electronic circuit pattern to be printed on the substrate 3 is imprinted on the outer peripheral portion of the resin layer by a known laser processing method or the like. In the gravure printing plate 24, the concave portion 24 a becomes a plate portion of the gravure printing plate 24, and the gravure printing machine 1 can print an electronic circuit pattern corresponding to the concave portion 24 a on the substrate 3.

  As shown in FIG. 1, the gravure roll 2 is immersed in the paste 12 accommodated in the tank 11, and thereby, in the concave portion 24 a of the gravure printing plate 24 provided on the peripheral surface of the gravure roll 2. A paste is applied. Further, excess paste 12 on the outer peripheral surface of the gravure printing plate 24 is scraped off by the doctor blade 8.

The paste 12 has conductivity, and is produced by kneading a binder material, a solvent, a dispersant, and the like with a conductive material (metal). Examples of the conductive material include metals such as Ni, Cu, Ag, Pd, and Au, or alloys such as an Ag—Pd alloy including one or more of these metals.

  Here, the expansion and contraction of the stretchable layer 23 in the radial direction by supplying fluid to the porous body 23a via the through-hole 21b or discharging the fluid from the porous body 23a will be described below.

  First, the configuration of the stretchable layer 23 will be described. FIG. 5 is an enlarged view of a portion A of the gravure roll 2 shown in FIG. 3A, and for the porous body 23a, the XX line of the plan view of the porous body 23a shown in FIG. It is a cross-sectional part.

  As shown in FIG. 5, the stretchable layer 23 is provided in the circumferential direction so as to cover the porous body 23 a provided in the circumferential direction so as to cover the outer peripheral face of the base material portion 21 and the outer peripheral face of the porous body 23 a. It is comprised from the elastic body 23b. The porous body 23a includes a plurality of micropores 23aa and micropore connection portions 23ab that connect the micropores 23aa to each other. The elastic body 23b is not bonded to the fine hole 23aa, and is bonded to the fine hole connecting portion 23ab of the porous body 23a via an adhesive. Note that the micropores 23aa penetrate the porous body 23 from the base member 21 side toward the elastic body 23b.

  In the stretchable layer 23, the fluid is introduced into the fine hole 23aa through the through hole 21b. The gravure printing plate 24 is provided in the circumferential direction so as to cover the outer peripheral surface of the elastic body 23 b of the stretchable layer 23.

  Next, expansion and contraction in the radial direction of the stretchable layer 23 will be described below.

  As shown in FIG. 5, for example, a predetermined amount of fluid is previously introduced into the micropores 23aa of the porous body 23 so that the stretchable layer 23 has a predetermined thickness H. The outer circumference of the stretchable layer 23 has a predetermined circumferential length, and as a result, the outer circumference of the gravure printing plate 24 is set to a predetermined circumferential length. The predetermined circumferential length of the outer periphery of the gravure printing plate 24 is, for example, the circumferential length of the outer periphery of the gravure printing plate 24 when the paste 12 is printed on the substrate 3 that has not received a thermal history. is there.

  As shown in FIG. 6, the elastic layer 23 has the elastic body 23 b positioned in the fine hole 23 aa in the gravure printing plate 24 when a fluid is fed into the fine hole 23 aa of the porous body 23 a through the through hole 21 b. It extends to expand the outer periphery of the diametrically. Here, since the fine hole connecting portion 23ab and the elastic body 23b are bonded via an adhesive, the stretchable layer 23 extends so that the elastic body 23b located in the fine hole 23aa expands in the radial direction.

  Thus, as shown in FIG. 6, the stretchable layer 23 has a thickness that is larger by ΔH than that before the fluid is fed by feeding the fluid into the fine holes 23 aa, and the gravure printing plate 24 is The circumferential length of the outer circumference increases by an amount corresponding to ΔH.

  Therefore, in the gravure roll 2, the outer periphery of the gravure printing plate 24 expands in the radial direction by controlling the amount of fluid fed into the stretchable layer 23. That is, the gravure roll 2 can be adjusted in the direction of increasing the circumferential length of the outer periphery of the gravure printing plate 24 by controlling the amount of fluid fed into the fine holes 23aa of the stretchable layer 23.

  Here, the case where the stretchable layer 23 extends in the radial direction has been described, but the same applies to the case where the stretchable layer 23 shrinks in the radial direction. The gravure roll 2 controls the amount of fluid fed from the stretchable layer 23. The circumferential length of the outer periphery of the gravure printing plate 24 can be adjusted to be reduced.

For example, as shown in FIG. 7A, the porous body 23a includes a large number of micro holes 23aa having a substantially hexagonal shape in plan view and a micro hole connecting portion 23ab surrounding the micro holes 23aa. It has a mesh structure in which 23aa are arranged and is made of a metal material such as Ni. The porous body 23a is 200 to 500 (mesh / inch), the pore diameter is, for example, 32 (μm) to 87 (μm), and the thickness is, for example, 19 (μm) to 40 (μm). It is.

  The annular porous body 23 a is provided so as to be fitted into the outer peripheral surface of the cylindrical base material portion 21. In addition, the shape of the fine hole 23aa is not limited to the hexagonal shape, and may be a quadrangular shape, as long as the elastic layer 23 can be expanded and contracted in the radial direction, and is not limited thereto.

FIG. 7B is a cross-sectional view taken along the YY line and the ZZ line of the porous body 23 a including the base material portion 21. As shown in FIG. 7 (b), the minute hole connecting portion 23 ab is in contact with the outer peripheral surface of the base portion 21 at the corners of the hexagonal shape. As described above, the microscopic hole connecting part 23ab forms a space with the outer peripheral surface of the base material part 21, and the fluid flows through the microscopic hole 23aa through the space.

  Accordingly, the fluid introduced into the micropores 23aa is uniformly distributed between the micropores 23aa because the micropores 23aa are connected to each other through a space as shown by arrows in FIG. 7C. Go. As a result, in the porous body 23a, the fluid flows uniformly over the entire micropores 23aa, so that the elastic body 23b can be uniformly expanded or contracted in the radial direction. Moreover, the base material part 21 may provide a fine groove | channel on an outer peripheral surface so that a fluid may spread uniformly in micropore 23aa.

  Further, the portion of the fine hole connecting portion 23ab that is in contact with the elastic body 23b may be polished or mirror-finished in order to improve the adhesion with the elastic body 23b. The porous body 23a may be made of, for example, a resin material such as urethane foam.

  Here, a printing method using the gravure printing machine 1 will be described. FIG. 8 is an explanatory diagram for explaining a state in which the paste 12 is printed on the substrate 3 using the gravure printing machine 1 shown in FIG. In FIG. 8, the tank 11 and the impression cylinder 4 are omitted.

  For example, the substrate 3 is held by the carrier 10 and is conveyed in the direction indicated by the arrow in FIG. 8. The gravure printing machine 1 passes the substrate 3 between the gravure roll 2 and the impression cylinder 4. At this time, the paste 12 is printed on the substrate 3 by the gravure printing plate 24. Moreover, although the to-be-printed material 3 may become a dimension different from the dimension at the time of a design by the dimensional variation in a manufacturing process, or the thermal history before printing of the paste 12, the gravure printing machine 1 is the dimension of the to-be-printed material 3. The paste 12 can be printed according to the above.

  Further, as shown in FIG. 8, the substrate 3 is disposed such that the longitudinal direction is the transport direction. Thus, the gravure printing machine 1 adjusts the circumferential length of the outer periphery of the gravure printing plate 24 with respect to the dimension of the printed material 3 that is expanded and contracted in the longitudinal direction, and prints the paste 12 on the printed material 3. Can do. In the following description, the case where the substrate 3 receives a heat history before the paste 12 is printed is taken as an example.

  The gravure printing machine 1 controls the amount of fluid introduced into the hollow portion 21a in accordance with the amount of deformation of the substrate 3 in order to adjust the circumferential length of the outer periphery of the gravure printing plate 24 by expanding and contracting the stretchable layer 23. A fluid control unit 7 is provided. The deformation amount of the printing material 3 is obtained by, for example, obtaining position information of predetermined measurement points (x1, x2) of the printing material 3 with the measurement cameras 5a and 5b and obtaining the position information with the measurement cameras 5a and 5b. Is calculated by the deformation amount calculation unit 6.

  As shown in FIG. 8, the measurement cameras 5a and 5b measure the position coordinates of two predetermined points (x1, x2) on the substrate 3 before printing the paste 12 on the substrate 3, The position coordinate signal is output to the deformation amount calculation unit 6.

  As shown in FIG. 8, the deformation amount calculation unit 6 calculates a dimension X1 between two points (x1, x2) of the substrate 3 before printing based on the position coordinate signals output from the measurement cameras 5a and 5b. To do. In addition, the deformation amount calculation unit 6 stores in advance a dimension X2 between two points (x1, x2) at the time of designing the substrate 3 that has not received the thermal history, and the deformation amount is a difference between X1 and X2. ΔX (= X1-X2) is calculated. The calculated deformation amount ΔX is a deformation amount obtained by deforming the printing material 3 due to the thermal history.

  Then, a deformation amount signal based on the deformation amount ΔX is output from the deformation amount calculation unit 6 to the fluid amount control unit 7. In addition, the dimension of the to-be-printed material 3 before printing may expand or contract beyond the dimension at the time of design, and the deformation amount ΔX becomes a positive or negative value.

  The fluid amount control unit 7 stores in advance the relationship between the deformation amount ΔX of the substrate 3 and the circumferential length of the gravure printing plate 24. Further, the fluid amount control unit 7 has a function capable of adjusting the fluid amount and the fluid pressure in the hollow portion 21a of the base member 21 by, for example, a compressor.

  When the deformation amount ΔX shows a positive value, the fluid amount control unit 7 sets the fluid circulation pipe 22 so that the outer periphery of the gravure printing plate 24 has a circumferential length corresponding to the deformation amount ΔX of the substrate 3. The fluid can be fed into the porous body 23a of the stretchable layer 23 through the gap.

  In addition, when the deformation amount ΔX shows a negative value, the fluid amount control unit 7 causes the fluid flow pipe so that the outer periphery of the gravure printing plate 24 has a circumferential length corresponding to the deformation amount ΔX of the substrate 3. The fluid can be sent out from the porous body 23 a of the stretchable layer 23 via 22.

  Thus, the gravure roll 2 can adjust the circumferential length of the outer periphery of the gravure printing plate 24 according to the deformation amount due to the thermal history of the substrate 3. Thereby, the gravure printing machine 1 can print the paste 12 on the printing material 3 with the gravure printing plate 24 whose circumferential length is adjusted according to the deformation amount ΔX of the printing material 3.

  The gravure printing machine 1 adjusts the circumferential length of the outer periphery of the gravure printing plate 24 provided on the outer peripheral surface of the stretchable layer 23 by controlling the amount of fluid in the porous body 23 a of the stretchable layer 23 of the gravure roller 2. can do. As a result, the gravure printing machine 1 adjusts the circumferential length of the gravure printing plate 24 for each printing material 3 with respect to the printing material 3 having a dimensional variation in the manufacturing process or the printing material 3 having a different deformation amount due to thermal history. Thus, the paste 12 can be printed at an optimum position. Therefore, the gravure printing machine 1 can improve the printing accuracy of the paste 12 on the substrate 3.

  Moreover, the gravure printing machine 1 can be used for manufacturing a multilayer ceramic electronic component such as a multilayer ceramic capacitor. That is, as shown in FIG. 14, the gravure printing machine 1 pastes a paste film 12 on a substrate 3 by gravure printing on a pace film 9 to be a patterned layer that forms a part of a multilayer structure provided in a multilayer ceramic electronic component. Can be used for printing.

The present invention is not limited to the first embodiment described above, and various modifications and improvements can be made without departing from the scope of the present invention. Hereinafter, other embodiments will be described. Of the gravure printing machine 1 and the gravure roll 2 according to other embodiments, the same parts as those of the gravure printing machine 1 and the gravure roll 2 according to the first embodiment are denoted by the same reference numerals. The description will be omitted as appropriate.

<Embodiment 2>
Hereinafter, the stretchable layer 230 of the gravure roll 2A (not shown) according to the second embodiment (referred to as the second embodiment) of the present invention will be described with reference to FIG. 9 and FIG.

  In the second embodiment, the configuration of the stretchable layer 230 of the gravure roll 2A is different from the stretchable layer 23 of the gravure roll 2 of the first embodiment.

  The stretchable layer 230 of the gravure roll 2 </ b> A according to Embodiment 2 has a configuration as shown in FIG. 9 and is provided in the circumferential direction so as to cover the outer peripheral surface of the base material portion 21. The stretchable layer 230 includes a porous body 230a and an elastic body 230b provided so as to cover the porous body 230a, and supplies fluid to the porous body 230a through the through holes 21b or from the porous body 230a. It expands and contracts in the radial direction by discharging the fluid.

  That is, the stretchable layer 230 functions as an integral body of the porous body 230a and the elastic body 230b, thereby supplying fluid to the porous body 230a via the through hole 21b and discharging fluid from the porous body 230a. To expand and contract in the radial direction. The stretchable layer 230 has pores 230aa inside the porous body 230a, and is made of, for example, urethane foam. Moreover, the through-hole 21b may be provided in the base material part 21, or may be provided in multiple numbers. The hole part 230a has an average hole diameter of, for example, 20 (μm) to 500 (μm).

  As shown in FIG. 10, the stretchable layer 230 is formed such that a fluid is sent into the pore portion 230aa of the porous body 230a through the through hole 21b, whereby the inside of the pore portion 230aa swells and the porous body 230a is radially It stretches to spread. Thereby, the stretchable layer 230 extends so that the elastic body 230b expands the outer periphery of the gravure printing plate 24 in the radial direction.

  Thus, as shown in FIG. 10, the stretchable layer 230 has a thickness that is larger by ΔH than that before the fluid is fed by feeding the fluid into the hole 230 aa, and the gravure printing plate 24. Is increased by an amount corresponding to the circumference of the outer circumference corresponding to ΔH.

  Therefore, the gravure roll 2A can be adjusted in the direction of increasing the circumferential length of the outer periphery of the gravure printing plate 24 by controlling the amount of fluid fed into the hole portion 230aa. Further, the gravure roll 2A can be adjusted in the direction of reducing the circumferential length of the outer periphery of the gravure printing plate 24 by controlling the amount of fluid sent out from the hole portion 230aa.

  As shown in FIG. 11, the stretchable layer 230A may be a porous body 230a formed of a sponge-like rubber body sandwiched between two layers of an elastic body 230b and the elastic body 230b. In this case, the stretchable layer 230A has at least a part of the elastic body 230b on the base material part 21 side corresponding to the opening part of the through hole 21b, and the hole part extends from the opening part. Fluid is sent to 230aa.

  Thus, the porous body 23a of the first embodiment has a two-dimensional network structure, whereas the porous body 230a of the second embodiment has a three-dimensional network structure or a sponge-like structure. .

<Embodiment 3>
Hereinafter, a gravure roll 2B according to a third embodiment (referred to as Embodiment 3) of the present invention will be described with reference to FIG. In FIG. 12, the flow of the fluid inside the base member 21 is schematically shown by arrows.

  As shown in FIG. 12, the gravure roll 2 </ b> B according to the third embodiment is provided with the rotating shaft 2 b of the gravure roll 2 and the fluid circulation pipe 22 separately. The fluid circulation pipe 22 passes through the one side plate 2 a not provided with the rotating shaft 2 b and is provided so as to pass through the hollow portion 21 a in the longitudinal direction of the base material portion 21. As a result, the fluid flow pipe 22 can be manufactured without requiring the performance of the rotating shaft.

<Embodiment 4>
Hereinafter, a gravure roll 2C according to a fourth embodiment (referred to as a fourth embodiment) of the present invention will be described with reference to FIG. In FIG. 13, the flow of fluid inside the base material portion 21 is schematically shown by arrows.

  As shown in FIG. 13, the gravure roll 2 </ b> C according to the fourth embodiment is provided with a through hole in one rotating shaft 2 b of the gravure roll 2, and introduces a fluid 21 a through the through hole. Thus, the gravure roll 2C can have a simplified configuration.

  The present invention is not particularly limited to Embodiments 1 to 4 described above, and various modifications and improvements can be made within the scope of the present invention. For example, the measurement of the size of the printing material is performed by using a single measurement camera, based on the time required for two predetermined points (x1, x2) of the printing material to pass through the measurement camera and the conveyance speed of the printing material. A calculation method may be used.

DESCRIPTION OF SYMBOLS 1 Gravure printing machine 2, 2A, 2B, 2C Gravure roll 3 Printed material 12 Paste 21 Base material part 21a Hollow part 21b Through-hole 22 Fluid flow pipe 23, 230, 230A Stretchable layer 23a, 230a Porous body 23b, 230b Elastic body 24 Gravure printing plate

Claims (5)

A gravure roll provided in a gravure printing machine for printing a paste by gravure printing on a substrate,
A cylindrical base portion having a hollow portion at a central portion in the radial direction and having a through hole that opens to an outer peripheral surface and connects the hollow portion, and a fluid is introduced into the hollow portion;
An elastic layer provided in the circumferential direction so as to cover the outer peripheral surface of the base material portion, and stretchable in the radial direction;
A gravure printing plate provided in the circumferential direction so as to cover the outer peripheral surface of the stretchable layer,
The stretchable layer comprises a porous body and an elastic body provided so as to cover the porous body, and the supply of the fluid to the porous body via the through-hole or the fluid from the porous body A gravure roll that expands and contracts in the radial direction by discharging the water. A gravure roll provided in a gravure printing machine for printing a paste by gravure printing on a substrate,
A cylindrical base portion having a hollow portion at the center in the radial direction and having a through hole that opens to the outer peripheral surface and connects the hollow portion;
A fluid flow pipe provided through the hollow portion in the longitudinal direction of the base material portion and having a flow passage through which a fluid flows; and the flow passage communicates with the hollow portion;
An elastic layer provided in the circumferential direction so as to cover the outer peripheral surface of the base material portion, and stretchable in the radial direction;
A gravure printing plate provided in the circumferential direction so as to cover the outer peripheral surface of the stretchable layer,
The stretchable layer comprises a porous body and an elastic body provided so as to cover the porous body, and the supply of the fluid to the porous body via the through-hole or the fluid from the porous body A gravure roll that expands and contracts in the radial direction by discharging the water. The gravure roll according to claim 2,
The gravure roll, wherein the fluid circulation pipe is a rotating shaft of the gravure roll.   A gravure printing machine comprising the gravure roll according to any one of claims 1 to 3. 5. A method for printing an electronic circuit pattern, wherein printing is performed using the gravure printing machine according to claim 4.

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