JP2017077701A - Screen printer, control method of screen printer, screen printing method, manufacturing method of fuel battery cell stack, and manufacturing method of fuel battery cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screen printer capable of adjusting a gap formed between a squeegee and a molded body, a control method of the screen printer, a screen printing method, a manufacturing method of a fuel battery cell stack, and a manufacturing method of a fuel battery cartridge.SOLUTION: A screen printer 11 includes: a screen mask 6 placed on an upper side of a cylindrical substrate tube 10, in which its longitudinal direction is set horizontally, and configured to pass slurry 16; a squeegee 2 which is placed in contact with an upper surface of the screen mask 6; division squeegee holders 3A which are arranged in the longitudinal direction, support the squeegee 2, and move the squeegee 2 to the substrate tube 10 side; position adjustment parts 4 which move the division squeegee holders 3A in a vertical direction while supporting the division squeegee holders 3A; pressure-sensitive sensors 5, each of which is installed at the division squeegee holder 3A and detects a pressing force applied by the squeegee 2 to the substrate tube 10; and a control part which controls moving distances of the division squeegee holders 3A moved by the position adjustment parts 4 on the basis of the pressing force.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a screen printing apparatus, a screen printing apparatus control method, a screen printing method, a fuel cell stack manufacturing method, and a fuel cell cartridge manufacturing method.

2. Description of the Related Art Fuel cells that generate electricity by chemically reacting fuel gas and oxygen are known. Among these, a solid oxide fuel cell (hereinafter referred to as “SOFC”) is an operated fuel cell using ceramics such as zirconia ceramics as an electrolyte. The fuel gas used in SOFC includes, for example, city gas and natural gas composed of hydrocarbon gases such as hydrogen (H ₂ ), carbon monoxide (CO), methane (CH ₄ ), petroleum, methanol, coal, etc. It is a gas produced from a carbonaceous raw material by gasification equipment.

  There is a type of SOFC that includes a plurality of cylindrical cell stacks. The cylindrical cell stack includes a cylindrical base tube, a plurality of fuel cells formed on the outer peripheral surface of the base tube, and adjacent fuel cells. And an interconnector formed thereon. The fuel cell is formed by laminating a fuel electrode, a solid electrolyte, and an air electrode.

The base tube is made of a long ceramic. When manufacturing the base tube, first, the composition of the ceramic material and the powder size are adjusted, and a slurry is generated from the ceramic material and the solvent. Then, the slurry is extruded to form a soft body tube. Then, in order to make the base tube hard enough to be transported, the soft base tube is dried. A fuel electrode, a solid electrolyte, and an interconnector are deposited on the dried substrate tube by screen printing, and then the deposited substrate tube is integrally fired. In addition, an air electrode is formed by a jet dispenser on the base tube on which the fuel electrode and the like are integrally fired, and then the base tube on which the air electrode is formed is fired. As a result, a cylindrical cell stack in which fuel cells and interconnectors are formed on the surface of the base tube is formed.
The base tube described below is a molded body in which a fuel electrode, a solid electrolyte, and an interconnector are formed by screen printing on a molded body to be supported when the molded body is a molded body as a support of a cylindrical solid electrolyte fuel cell. In addition, the case includes all cases where the air electrode is a molded body on which a film is formed.

  Patent Document 1 listed below discloses a technique for avoiding a gap generated between a screen mesh and a base tube when screen-printing slurry to be a fuel electrode, an electrolyte, and an air electrode on a cylindrical base tube. Is disclosed. Specifically, magnets having different magnetism are accommodated in the squeegee holder that supports the squeegee and the inside of the base tube.

JP 2004-134180 A

  As shown in FIGS. 13 and 14, when the slurry 16 is screen-printed with the screen mask 6 and the squeegee 2 extending in the longitudinal axis direction on the surface of the long cylindrical base tube 10, the base tube 10 is hollow. A rod-shaped core rod 15 is inserted into the inside of the portion, and the core rod 15 protruding from both ends of the base tube 10 is placed on the receiving roller 7. When the slurry 16 is printed on the surface of the substrate tube 10, the squeegee 2 supported by the squeegee holder 3 is pressed against the substrate tube (printing pressure), as shown in FIG. 14, in the direction in which the printing pressure is applied. The central part of the tube 10 bends. As a result, a gap is generated between the squeegee 2 and the base tube 10, and the slurry 16 cannot be formed (printed) uniformly and uniformly on the surface of the base tube 10.

  Moreover, in the method described in Patent Document 1, in order to make the gap generated between the squeegee and the base tube uniform, it is necessary to install magnets at appropriate positions inside the squeegee holder and the base tube. It is difficult to properly arrange the magnets in the longitudinal direction. Furthermore, since the size of the gap changes according to the strength of the magnetic force of the magnet, there is a problem that it is difficult to make the gap uniform when using a permanent magnet that is difficult to adjust the magnetic force.

  The present invention has been made in view of such circumstances, and is a screen printing apparatus capable of adjusting a gap formed between a squeegee and a molded body, a control method for the screen printing apparatus, and a screen printing method. An object of the present invention is to provide a method for manufacturing a fuel cell stack and a method for manufacturing a fuel cell cartridge.

In order to solve the above problems, the screen printing apparatus, the control method for the screen printing apparatus, the screen printing method, the fuel cell stack manufacturing method, and the fuel cell cartridge manufacturing method of the present invention employ the following means.
That is, the screen printing apparatus according to the present invention is placed on the vertical upper side of a cylindrical shaped body whose longitudinal direction is set horizontally, and is brought into contact with the screen portion through which slurry passes and the upper surface of the screen portion. A squeegee extending in the longitudinal direction, a plurality of squeegee support portions arranged in the longitudinal direction, supporting the squeegee and moving the squeegee toward the molded body, and a vertical vertical direction while supporting the squeegee support portion A position adjustment unit that moves the squeegee, a detection unit that is installed in the squeegee support unit and detects a pressing force of the squeegee against the molded body, and a movement amount of the squeegee support unit by the position adjustment unit based on the pressing force And a control unit for controlling.

  According to this configuration, the position adjustment unit controls the amount of movement of the squeegee support unit based on the pressing force applied to the molded body by the squeegee. A plurality of squeegee support portions are arranged in the longitudinal direction of the squeegee, a detection portion is installed in each squeegee support portion, and each is moved by the position adjustment portion based on the detected pressing force. Therefore, since the amount of movement of the squeegee support portion can be changed according to the amount of bending at each position in the longitudinal direction of the molded body, the gap between the squeegee and the molded body can be adjusted.

  In the above invention, the both ends of the molded body in the longitudinal direction are supported so as to be rotatable from vertically below, and the both ends of the molded body are installed at positions farther from the center of the molded body than the receiving section. A holding portion that supports the side from the vertically upper side and that presses both ends of the molded body may be further provided.

  According to this configuration, the holding portion that is placed closer to the end of the molded body than the receiving portion on which the molded body is placed supports the molded body from above and presses the end of the molded body. Thus, the molded body is curved upward and convex at the intermediate portion. Thereby, when a molded object is pressed by the squeegee from the upper direction of a molded object, the clearance gap between a squeegee and a molded object can be reduced compared with the case where a molded object is not curved upwards.

  In the above-mentioned invention, the longitudinally opposite ends of the rod-shaped core rod that is inserted into the cylindrical hollow portion of the molded body in the longitudinal direction and protrudes from the end of the molded body are rotatably supported from vertically below. And both ends of the core bar are rotatably supported from vertically above, and the both end sides of the core bar are supported at a position farther from the center of the core bar than the receiving part. You may further provide the holding | suppressing part to press.

  According to this configuration, the holding portion installed on the end side of the core rod from the receiving portion on which the core rod is placed supports the core rod from above, and the end portion of the core rod Since the core rod is pressed, the core rod curves upward at the middle portion. Thereby, when a molded object is pressed by the squeegee from the upper direction of a molded object, the clearance gap between a squeegee and a molded object can be reduced compared with the case where a molded object is not curved upwards.

  The screen printing apparatus according to the present invention is placed on the vertical upper side of a cylindrical shaped body whose longitudinal direction is set horizontally, and has a screen part that allows slurry to pass through, and the longitudinal part that comes into contact with the upper surface of the screen part. A squeegee extending in a direction, a squeegee support portion arranged in the longitudinal direction, supporting the squeegee and moving the squeegee to the molded body side, and both longitudinal ends of the molded body from the vertically lower side A receiving portion that is rotatably supported, and is installed at a position farther from the center of the molded body than the receiving portion, and supports both ends of the molded body so as to be rotatable from vertically above, and both ends of the molded body. A holding part that presses the part side.

  The screen printing apparatus according to the present invention is placed on the vertical upper side of a cylindrical shaped body whose longitudinal direction is set horizontally, and has a screen part that allows slurry to pass through, and the longitudinal part that comes into contact with the upper surface of the screen part. A squeegee extending in a direction, a squeegee support portion disposed in the longitudinal direction, supporting the squeegee and moving the squeegee toward the molded body, and inserted into a cylindrical hollow portion of the molded body in the longitudinal direction. A receiving part that rotatably supports both ends in the longitudinal direction of the rod-shaped core bar provided protruding from the end of the molded body, and a position farther from the center of the core bar than the receiving part. And a pressing portion that rotatably supports both ends of the core rod from above and that presses both ends of the core rod.

In the above invention, the core rod may have a hollow portion at least partially disposed in the longitudinal direction between the receiving portions.
According to this configuration, the bending shape and the bending amount of the core rod can be adjusted by the difference in the cross-sectional second moment between the solid portion and the hollow portion.

  The control method of the screen printing apparatus according to the present invention is placed on the vertical upper side of a cylindrical molded body whose longitudinal direction is set horizontally, and is brought into contact with the upper surface of the screen unit, the screen unit allowing the slurry to pass therethrough. A squeegee that extends in the longitudinal direction, a plurality of squeegee support portions that are arranged in the longitudinal direction, support the squeegee and move the squeegee toward the molded body, and vertically up and down while supporting the squeegee support portion A method of controlling a screen printing apparatus including a position adjusting unit that moves in a direction, wherein the squeegee support unit detects a pressing force against the molded body by the squeegee, and the pressing force is based on the pressing force. Controlling the amount of movement of the squeegee support portion by the position adjusting portion so that is within a range defined by a predetermined value.

  The screen printing method according to the present invention is placed on the vertical upper side of a cylindrical shaped body whose longitudinal direction is set horizontally, and passes the slurry, and the longitudinal portion that comes into contact with the upper surface of the screen portion. A squeegee extending in a direction, a squeegee support portion arranged in the longitudinal direction, supporting the squeegee and moving the squeegee to the molded body side, and rotating both longitudinal ends of the molded body from below vertically It is a screen printing method comprising a receiving portion that can be supported and a holding portion that is installed at a position farther from the center of the molded body than the receiving portion, and the holding portions are arranged on both end sides of the molded body. The step of rotatably supporting from above vertically and the step of pressing the both end sides of the molded body to make the molded body into a curved shape convex in the vertically upward direction.

  The screen printing method according to the present invention is placed on the vertical upper side of a cylindrical shaped body whose longitudinal direction is set horizontally, and passes the slurry, and the longitudinal portion that comes into contact with the upper surface of the screen portion. A squeegee extending in a direction, a squeegee support portion arranged in the longitudinal direction, supporting the squeegee and moving the squeegee toward the molded body, and inserted into a hollow portion of the molded body in the longitudinal direction. A support part that rotatably supports both ends in the longitudinal direction of a rod-shaped core bar provided so as to protrude from the end of the body, and is installed at a position farther from the center of the molded body than the support part. And a step of supporting the both end sides of the core bar in a rotatable manner from above vertically; and the restraining unit includes both end portions of the core bar. And a step of a convex curved shape pressed vertically upward said molded body a.

  The method of manufacturing a fuel cell stack according to the present invention includes forming the molded body into a film using the control method of the screen printing apparatus or the screen printing method, and forming a fuel battery cell on the surface of the molded body, And manufacturing a fuel cell stack in which an interconnector is formed.

  The method of manufacturing a fuel cell cartridge according to the present invention includes forming the molded body into a film using the control method of the screen printing apparatus or the screen printing method, and forming a fuel cell and an interface on the surface of the molded body. Manufacturing a fuel cell stack in which a connector is formed, and manufacturing a fuel cell cartridge including the fuel cell stack.

  ADVANTAGE OF THE INVENTION According to this invention, the clearance gap formed between a squeegee and a molded object can be adjusted, and a slurry can be uniformly formed into a film over the longitudinal direction of a molded object by making a clearance gap constant.

1 is a front view showing a screen printing apparatus according to a first embodiment of the present invention. It is a front view which shows the screen printing apparatus which concerns on 1st Embodiment of this invention, and shows the state which the squeegee is contact | abutting to the base | substrate pipe | tube. It is a front view which shows the squeegee holder of the screen printing apparatus which concerns on 1st Embodiment of this invention, the position adjustment part which concerns on 1st Example, and a pressure sensor. It is the longitudinal cross-sectional view cut | disconnected by the IV-IV line | wire of FIG. It is a front view which shows the squeegee holder of the screen printing apparatus which concerns on 1st Embodiment of this invention, the position adjustment part which concerns on 2nd Example, and a pressure sensor. It is the longitudinal cross-sectional view cut | disconnected by the VI-VI line of FIG. It is a front view which shows the screen printing apparatus which concerns on 2nd Embodiment of this invention. It is a front view which shows the 1st modification of the core stick of the screen printing apparatus which concerns on 2nd Embodiment of this invention. It is a front view which shows the 2nd modification of the core stick of the screen printing apparatus which concerns on 2nd Embodiment of this invention. It is a front view which shows the 3rd modification of the core stick of the screen printing apparatus which concerns on 2nd Embodiment of this invention. It is a front view which shows the 1st modification of the screen printing apparatus which concerns on 2nd Embodiment of this invention. It is a front view which shows the 1st modification of the screen printing apparatus which concerns on 2nd Embodiment of this invention, and shows the state which the squeegee is contact | abutting to the base | substrate pipe | tube. It is a front view which shows the conventional screen printing apparatus. It is a front view which shows the conventional screen printing apparatus, and shows the state which the squeegee is contact | abutting to the base | substrate pipe | tube. It is a partial expanded sectional view which shows the cell stack which concerns on one Embodiment of this invention. It is a perspective view which shows the SOFC module which concerns on one Embodiment of this invention. It is sectional drawing which shows the SOFC cartridge which concerns on one Embodiment of this invention.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
First, the configuration of the screen printing apparatus 11 used for manufacturing the base tube of the fuel cell according to the first embodiment of the present invention will be described. The screen printing apparatus 11 is applied to a fuel cell substrate tube manufacturing apparatus.
A long base tube (molded body) 10 to be printed by the screen printing apparatus 11 according to the present embodiment is a cylindrical cell stack of a solid oxide fuel cell (hereinafter referred to as “SOFC”) to be described later. Become. The base tube 10 is made of ceramics.

  As shown in FIGS. 1 and 2, the screen printing apparatus 11 includes a squeegee 2, a squeegee holder 3, a position adjustment unit 4, a pressure sensor 5, a screen mask 6, a receiving roller 7, and a control unit 8. And so on.

  The squeegee 2 is a long plate made of rubber, for example, and has a length corresponding to the length from one end to the other end of the region where the fuel cell is formed in the base tube 10. The squeegee 2 is arranged on the upper side of the base tube 10 in a longitudinal direction parallel to the base tube 10. The squeegee 2 can be bent along the bending shape of the base tube 10. In FIG. 1, the longitudinal direction of the base tube 10 and the squeegee 2 is the left-right direction of the paper.

  The squeegee 2 has a lower end surface capable of contacting the screen mask 6 and an upper portion fixed to the squeegee holder 3. The squeegee 2 moves with the squeegee holder 3 in the vertical vertical direction perpendicular to the longitudinal direction.

  When the squeegee 2 comes into contact with the screen mask 6, the slurry 16 placed on the screen mask 6 is spread, and the slurry 16 passes through the mesh portion 6 a of the screen mask 6.

  The squeegee holder 3 sandwiches and fixes the plate-like squeegee 2. The squeegee holder 3 is divided into a plurality of parts in the longitudinal direction, and includes a plurality of divided squeegee holders 3A. The divided squeegee holder 3A is movable in the vertical vertical direction perpendicular to the longitudinal direction.

  Each divided squeegee holder 3 </ b> A has a configuration that can be rotated around the holder shaft 23 as shown in FIGS. 3 and 4 to be described later so that the squeegee 2 can be bent in the vertical vertical direction along the deflection of the base tube 10. . That is, the divided squeegee holder 3 </ b> A rotates around the holder shaft 23 and tilts corresponding to the tilt of the base tube 10. The holder shaft 23 is provided in a direction perpendicular to the plate surface 2A of the squeegee 2 (the front-rear direction in FIG. 1).

  The position adjustment unit 4 is disposed on a support frame of the screen printing apparatus 11 (not shown), and is installed along the longitudinal direction of the base tube 10 for each divided squeegee holder 3A, and adjusts the position of each divided squeegee holder 3A. . Specifically, the position adjustment unit 4 moves the divided squeegee holder 3A closer to the lower base tube 10 side, or moves the divided squeegee holder 3A away from the base tube 10. Thereby, even when the base tube 10 is bent vertically, the relative position of the squeegee 2 with respect to the base tube 10 can be made uniform.

  The pressure sensor 5 detects the contact pressure in the divided squeegee holder 3 </ b> A when the squeegee 2 is pressed against the base tube 10.

  The screen mask 6 includes a mesh portion 6a through which the slurry 16 passes, a mask portion 6b through which the slurry 16 does not pass, and a frame portion 6c that supports the mesh portion 6a and the mask portion 6b. The screen mask 6 can be bent along with the deflection of the base tube 10 together with the squeegee 2.

  The core rod 15 is a long rod having a circular cross section and longer than the base tube 10. The core rod 15 is inserted into the hollow portion of the base tube 10 in the longitudinal direction and protrudes from the end of the base tube 10. The core rod 15 is preferably one whose surface properties do not change due to oxidation or the like, or one having a strength that does not cause plastic deformation when inserted into the base tube 10, and is made of metal, for example, SUS304. The outer diameter of the core rod 15 is 0.7 to 0.9 times the inner diameter of the hollow portion of the base tube 10. The core rod 15 is a hollow portion of the base tube 10 and is provided with a gap with the inner surface of the base tube 10, so that the core rod 15 can be easily inserted into the base tube 10. The core rod 15 is rotated so that the moving speed of the screen mask 6 matches the peripheral speed of the base tube 10.

  The receiving roller 7 is installed near the end in the longitudinal direction of the core rod 15. The receiving roller 7 supports the core rod 15 from below so that the core rod 15 rotates around the longitudinal axis.

  The control unit 8 drives the position adjustment unit 4 based on the pressure detected by the pressure sensor 5. When the pressure detected by the pressure-sensitive sensor 5 is lower than the predetermined first threshold value, the position adjusting unit 4 is moved in a direction to approach the base tube 10 side, and the divided squeegee holder 3A is moved to the base tube 10 side below. Move closer. On the other hand, when the pressure detected by the pressure sensor 5 is higher than the predetermined second threshold value, the position adjusting unit 4 is moved away from the base tube 10 to move the divided squeegee holder 3A away from the base tube 10. The second threshold value is higher than the first threshold value. When the pressure detected by the pressure sensor 5 is between the first threshold value and the second threshold value, the position adjusting unit 4 is not moved.

Hereinafter, the squeegee holder 3, the position adjustment unit 4, and the pressure sensor 5 will be described in detail.
As shown in FIGS. 3 and 4, each divided squeegee holder 3 </ b> A includes a first connection portion 21, a fixing portion 22, and the like. The position adjustment unit 4 includes a ball screw mechanism 31, a second connection unit 32, a guide unit 33, a fixed frame 34, and the like.

  The second connecting portion 32 of the position adjusting unit 4 is connected to the ball screw 35 of the ball screw mechanism 31 at the upper end surface. The ball screw 35 is rotatable with respect to the second connection portion 32, and the second connection portion 32 is kept in a horizontal state and connected to the ball screw 35. The ball screw 35 is screwed into a screw hole 36 provided in the fixed frame 34. When the ball screw 35 is driven and rotated, the second connecting portion 32 connected to the ball screw 35 moves in the vertical vertical direction. A guide portion 33 is also provided on the upper end surface of the second connection portion 32, and slides along a through hole 34 </ b> A provided in the fixed frame 34. Thereby, the upper end surface of the 2nd connection part 32 can move only to the vertical up-down direction, maintaining a horizontal state. Further, when the ball screw 35 of the position adjustment unit 4 is driven, the position of the divided squeegee holder 3A is changed.

  The second connecting part 32 of the position adjusting unit 4 and the first connecting part 21 of the divided squeegee holder 3 </ b> A are connected by a holder shaft 23 in a rotatable state. The first connecting portion 21 is provided with a bearing 24 around a holder shaft 23, and the holder shaft 23 is fixed by a second connecting portion 32. Further, the axis of the holder shaft 23 is perpendicular to the plate surface 2A of the squeegee 2 extending in the longitudinal direction (the front-rear direction in FIG. 3). Thereby, the 1st connection part 21 is pivotable with respect to the 2nd connection part 32, makes the position adjustment part 4 incline with respect to a horizontal direction, and is the height of the one end part side of a longitudinal direction in the position adjustment part 4. The height on the other end side can be changed.

  The first connecting portion 21 has a protruding portion 21A with the upper portion protruding to the front surface, and a fixing portion 22 is provided below the protruding portion 21A. The fixed part 22 is connected to the first connecting part 21 by a guide part 25. The fixing portion 22 is slidable in the vertical direction along a through hole provided in the overhang portion 21A.

  A pressure-sensitive sensor 5 is provided between the overhanging part 21 </ b> A and the fixing part 22. The pressure detected by the pressure-sensitive sensor 5 changes as the distance between the overhanging portion 21A and the fixed portion 22 changes and the pressure applied to the pressure-sensitive sensor 5 changes. The fixed portion 22 sandwiches the plate surface 2A of the squeegee 2, and the squeegee 2 protrudes from the lower surface of the fixed portion 22 toward the surface of the base tube 10.

In the above-described embodiment, driving in the vertical direction in the position adjusting unit 4 has been described using the ball screw 35, but the present invention is not limited to this example.
For example, as shown in FIGS. 5 and 6, an air cylinder 41 is provided in the fixed frame 34. The air cylinder rod 42 is connected to the upper surface of the second connection portion 32. The air cylinder 41 may drive the air cylinder rod 42 to move the second connecting portion 32 in the vertical vertical direction. Other components are the same as the above-described example, and thus description thereof is omitted.

An operation of the screen printing apparatus 11 according to the present embodiment will be described.
First, the core 15 is placed on the receiving roller 7, and one end or both ends of the core 15 are gripped by the coupling 14. Then, with the slurry 16 placed on the screen mask 6, the screen mask 6 is brought close to the base tube 10. The base tube 10 may be brought close to the screen mask 6. Then, the core rod 15 is rotated around the longitudinal axis so that the moving speed of the screen mask 6 during printing matches the peripheral speed of the base tube 10 by the motor 13 that rotationally drives the coupling 14.

  Then, after the screen mask 6 and the base tube 10 approach each other, the base tube 10 is rotated after the squeegee 2 is brought into contact with the screen mask 6. At this time, based on the pressure detected by the pressure-sensitive sensor 5, the position of the position adjusting unit 4 provided in each divided squeegee holder 3A is adjusted.

  In addition, the screen printing confirmation test of the slurry is performed beforehand using the pressure which the pressure sensor 5 detects. As a result, the first threshold value that is the lower limit of the pressure detected by the pressure sensor 5 and the second threshold value that is the upper limit of the pressure are confirmed such that the formed film thickness and the film thickness distribution fall within a predetermined reference range. Has been. Further, it is more preferable that an allowable pressure difference range in which the pressure difference between the divided squeegee holders 3A does not become too large with the pressure between the first threshold value and the second threshold value is confirmed.

  In all the position adjustment units 4, the position of the position adjustment unit 4 is changed so that the pressure detected by the pressure-sensitive sensor 5 is between the first threshold value and the second threshold value. Furthermore, it is more preferable that the position of the position adjusting unit 4 is changed so as to be within the above-described allowable pressure difference range.

  As shown in FIG. 2, when the intermediate portion of the base tube 10 is bent downward by bringing the squeegee 2 into contact with the screen mask 6, the position adjusting unit 4 near both ends of the base tube 10 The position adjustment unit 4 disposed in the intermediate portion of the base tube 10 increases the amount of movement approaching the base tube 10.

  As described above, according to the present embodiment, the gap formed between the squeegee 2 and the base tube 10 can be adjusted by the position adjusting unit 4 of each divided squeegee holder 3 </ b> A arranged in the longitudinal direction, and the pressure sensor 5. The slurry 16 can be uniformly formed over the longitudinal direction of the base tube 10 by setting the pressure detected by the pressure within a range defined by a predetermined value.

  In the above-described embodiment, the case where the core rod 15 is inserted into the base tube 10 has been described, but the present invention is not limited to this example. That is, the base tube 10 may be placed directly on the receiving roller 7 without using the core rod 15.

[Second Embodiment]
As shown in FIG. 7, the screen printing apparatus 12 according to the present embodiment is similar to the screen printing apparatus 11 according to the first embodiment. The squeegee 2, the squeegee holder 3, the screen mask 6, the receiving roller 7, etc. Is provided.
In this embodiment, the squeegee holder 3 is comprised by one, for example, without dividing | segmenting into multiple in a longitudinal direction.

  As shown in FIG. 7, the screen printing apparatus 12 further includes a holding roller 9. The restraining rollers 9 are installed on both ends of the core rod 15 in the longitudinal direction from the receiving rollers 7. The restraining roller 9 supports the core rod 15 from vertically above so that the core rod 15 can rotate around the longitudinal axis.

  The holding roller 9 is arranged so that the upper surface of both ends of the core rod 15 is positioned below the upper surface of the core rod 15 when the base tube 10 and the core rod 15 are in a horizontal state. The rod 15 is fixed by moving from above to below. When the holding roller 9 is fixed at this position on both ends of the core rod 15, the core rod 15 and the base tube 10 are in a state in which the intermediate portion in the longitudinal direction is curved upwardly. At this time, rotational force about the support position of the receiving roller 7 on both ends is applied to the core 15, and a bending moment is generated in the core 15 between the receiving rollers 7 on both ends. doing.

  Then, at the position where the base tube 10 is curved upward, the base tube 10 is rotated around the longitudinal axis together with the core rod 15 while the position of the holding roller 9 is fixed. The core rod 15 and the base tube 10 are rotationally driven by a motor 13 provided at one or both ends of the core rod 15 via a coupling 14. Then, with the slurry 16 placed on the screen mask 6, the screen mask 6 is brought close to the base tube 10 and the squeegee 2 is brought into contact with the screen mask 6.

  As a result, the bending moment generated when the base tube 10 is pushed downward by the abutting pressure from the squeegee 2 side causes the core rod 15 and the intermediate portion in the longitudinal direction of the base tube 10 to be convex upward. The direction is opposite to the bending moment generated in the state. That is, the core rod 15 is in a situation where the rotational force cancels out at the support positions of the receiving rollers 7 on both ends, that is, in a state where no bending moment is generated in the core rod 15, so that the squeegee 2 holds the screen mask 6. When the base tube 10 is pushed downward in the state of being in contact with the base tube 10, the core rod 15 and the base tube 10 come closer to a horizontal state in the longitudinal direction. For this reason, in the screen printing process, the gap generated near the center in the longitudinal direction of the base tube 10 between the squeegee 2 and the base tube 10 can be reduced as compared with the case where the base tube 10 is not curved upward. it can. Therefore, the contact state between the squeegee 2 and the base tube 10 can be made uniform in the longitudinal direction, and the slurry 16 can be formed uniformly over the longitudinal direction of the base tube 10.

  Here, the fixing position of the holding roller 9 on the both end sides of the core rod 15 is the amount by which the core rod 15 and the base tube 10 are curved upward in the middle in the longitudinal direction (the amount of curvature in FIG. 7: H) or the value of the bending moment (M) generated in the core 15 can be managed. A convex curve that allows the slurry 16 to be uniformly formed in the longitudinal direction of the base tube 10 in a prior test, corresponding to the situation where the base tube 10 is pushed downward by the abutting pressure from the squeegee 2 side. By grasping the conditions such as the quantity (H) and moment (M), it is possible to manage appropriately.

  By suppressing the deformation in the vertical direction near the center in the longitudinal direction due to the weight of the core rod 15, the pressing of the restraining roller 9 can be reduced, and the bending moment generated in the core rod 15 can be reduced. it can. The core rod 15 may be solid or hollow from one end to the other end. If the core 15 is hollow, it is possible to reduce the deformation in the vertically downward direction near the center in the longitudinal direction due to the weight of the core 15. When the base tube 10 is pushed downward with the squeegee 2 being in contact with the base tube 10 via the screen mask 6, the core rod 15 and the base tube 10 are restrained to approach a horizontal state in the longitudinal direction. The pushing amount of the roller 9 can be reduced. Therefore, there is a margin with respect to the maximum amount of push-in, so that the adjustment range of the push-in amount of the suppression roller 9 can be widened and adjustment is easy. Further, since the deformation difference between the core rod 15 and the base tube 10 due to the difference in the presence / absence of the contact state of the squeegee 2 is small, even if there is a distribution of characteristics in the longitudinal direction of the base tube 10, complicated three-dimensional deformation is involved. Without applying a small bending moment to the core rod 15, adjustment can be made so as to be uniform in the longitudinal direction. Thereby, the clearance gap produced between the squeegee 2 and the base tube 10 can be reduced.

  The core rod 15 may have a solid end portion and a hollow intermediate portion. Since the solid member has a large moment of inertia, the end side is solid, so that there is no deformation or damage to the load applied by the receiving roller 7 and the holding roller 9 as compared with the hollow case. Can withstand. Further, since the end portion side is a region where its own weight deformation is smaller than that of the intermediate portion, even the solid member has a small influence on the amount of bending in the vertical downward direction near the center in the longitudinal direction of the core rod 15.

  In the core rod 15, when the solid portion and the hollow portion are combined, by changing the length of the hollow member, the bending shape in the vertically downward direction near the center in the longitudinal direction of the core rod 15 or the center deflection is achieved. The amount can be adjusted.

For example, as shown in FIG. 8, suppressed when performing a predetermined pushing rollers 9, when the length L ₀ all between the inner of the two receiving rollers 7 and a hollow member, protruding the entire core rod 15 Accordingly, the entire longitudinal direction of the base tube 10 can be convexly curved, and since the overall secondary moment is smaller than that of the solid core rod, the convex curved shape is increased. can do. That is, it is possible to reduce the pushing-in with the restraining roller 9 to obtain a necessary convex curved shape. Therefore, there is a margin with respect to the maximum amount of push-in, so that the adjustment range of the push-in amount of the suppression roller 9 can be widened and adjustment is easy. In FIG. 8, the bending amount H _{0 is} near the center and the bending amount H ₁ is near the end.

Further, as shown in FIG. 9, when a predetermined push-in is performed by the restraining roller 9, an intermediate portion L ₀ ′ of the length L ₀ between the inner sides of the two receiving rollers 7 is a hollow member, and the end portion A region having a length of L ₁ ′ / 2 (= (L ₀ −L ₀ ′) / 2) on each side may be a solid part. In this case, since the hollow member having a small cross-sectional second moment is disposed in the intermediate portion, the convex curved shape can be made larger in the central portion in the longitudinal direction than in the example shown in FIG. That is, the bending amount H ₀ ′ near the center can be made relatively large, and the bending amount H ₁ ′ near the end can be made relatively small.

On the other hand, as shown in FIG. 10, the intermediate portion L ₁ ″ of the length L ₀ between the inner sides of the two receiving rollers 7 is a solid member, and the end portions L ₀ ″ / 2 (= A region having a length of (L ₀ −L ₁ ″) / 2) may be a hollow portion. In this case, since the hollow member having a large second moment of section is arranged in the middle portion, the convex curved shape can be made smaller in the central portion in the longitudinal direction than in the example shown in FIG. That is, the bending amount H ₀ ″ near the center can be made relatively small.

  That is, in the vicinity of the center of the core 15, either a hollow part or a solid part is arranged, or the length of the hollow part and the solid part is set so that a convex curve is formed in the central part in the longitudinal direction. The shape can be adjusted. For this reason, it becomes possible to adjust the convex curved shape of the central portion in the longitudinal direction of the core rod 15 in accordance with the situation in which the base tube 10 is pushed downward by the contact pressure from the squeegee 2 side. . For this reason, the clearance gap which generate | occur | produces in the center vicinity of the longitudinal direction of the base tube 10 between the squeegee 2 and the base tube 10 can be reduced. Therefore, the contact state between the squeegee 2 and the base tube 10 can be made uniform in the longitudinal direction, and the slurry 16 can be formed uniformly over the longitudinal direction of the base tube 10.

  In this embodiment, as shown in FIGS. 11 and 12, the squeegee holder 3 may be composed of a plurality of divided squeegee holders 3A, as in the first embodiment. In the preliminary confirmation test, the core rod 15 has various hollow portions or solid portions, and the core rod 15 is appropriately selected so as to have a convex curved shape near the center in the longitudinal direction. In this case, when the squeegee 2 is brought into contact with the screen mask 6, the intermediate portion of the base tube 10 is bent vertically upward in a state where the convex curved shape is adjusted. Since the movement amount of the arranged position adjustment unit 4 is smaller than that in the first embodiment, the influence of fluctuation of the film thickness by the position adjustment unit 4 is reduced, and the film thickness can be easily managed.

  At this time, the divided squeegee holder 3 </ b> A rotates around the holder shaft 23 (see FIG. 4), and the squeegee 2 is curved along the deflection of the base tube 10.

  In the above-described embodiment, the case where the core rod 15 is inserted into the base tube 10 has been described, but the present invention is not limited to this example. That is, the base tube 10 may be directly placed on the receiving roller 7 without using the core rod 15, and the restraining roller 9 may support the base tube 10 from above.

Hereinafter, an example of the SOFC according to the present embodiment will be described.
In the following, for convenience of explanation, the positional relationship of each component is specified using the expressions “upper” and “lower” on the basis of the paper surface, but this is not necessarily limited to the vertical direction. For example, the upward direction on the paper surface may correspond to the downward direction in the vertical direction. Moreover, you may respond | correspond to the horizontal direction where the up-down direction in a paper surface goes orthogonally to a perpendicular direction.

(Cylindrical cell stack structure)
First, a cylindrical cell stack according to this embodiment will be described with reference to FIG. Here, FIG. 15 shows one mode of the cell stack according to the present embodiment. The cell stack 101 includes a cylindrical base tube 103, a plurality of fuel cells 105 formed on the outer peripheral surface of the base tube 103, and an interconnector 107 formed between adjacent fuel cells 105. The fuel cell 105 is formed by stacking a fuel electrode 109, a solid electrolyte 111, and an air electrode 113. The cell stack 101 is connected to the air electrode 113 of the fuel cell 105 formed at the end in the axial direction of the base tube 103 among the plurality of fuel cells 105 formed on the outer peripheral surface of the base tube 103. A lead film 115 is electrically connected through the connector 107.

(Explanation of materials and functions of each component of cell stack)
The base tube 103 is made of a porous material, for example, CaO stabilized ZrO ₂ (CSZ), Y ₂ O ₃ stabilized ZrO ₂ (YSZ), or MgAl ₂ O ₄ . The base tube 103 supports the fuel cell 105, the interconnector 107, and the lead film 115, and supplies the fuel gas supplied to the inner peripheral surface of the base tube 103 through the pores of the base tube 103. Is diffused to the fuel electrode 109 formed on the outer peripheral surface of the electrode.

The fuel electrode 109 is made of an oxide of a composite material of Ni and a zirconia-based electrolyte material. For example, Ni / YSZ is used. In this case, in the fuel electrode 109, Ni that is a component of the fuel electrode 109 has a catalytic action on the fuel gas. This catalytic action reacts with a fuel gas supplied through the base tube 103, for example, a mixed gas of methane (CH ₄ ) and water vapor, and reforms it into hydrogen (H ₂ ) and carbon monoxide (CO). Is. Further, the fuel electrode 109 has an interface between the solid electrolyte 111 and hydrogen (H ₂ ) and carbon monoxide (CO) obtained by reforming and oxygen ions (O ²⁻ ) supplied via the solid electrolyte 111. It reacts electrochemically in the vicinity to produce water (H ₂ O) and carbon dioxide (CO ₂ ). At this time, the fuel cell 105 generates electric power by electrons emitted from oxygen ions.

The solid electrolyte 111 is mainly made of YSZ having gas tightness that prevents gas from passing through and high oxygen ion conductivity at high temperatures. The solid electrolyte 111 moves oxygen ions (O ²⁻ ) generated at the air electrode to the fuel electrode.

The air electrode 113 is made of, for example, a LaSrMnO ₃ oxide or a LaCoO ₃ oxide. The air electrode 113 generates oxygen ions (O ²⁻ ) by dissociating oxygen in an oxidizing gas such as air supplied near the interface with the solid electrolyte 111.

The interconnector 107 is composed of a conductive perovskite oxide represented by M _1-x L _x TiO ₃ (M is an alkaline earth metal element, L is a lanthanoid element) such as SrTiO ₃ system, and is composed of fuel gas and oxidation It is a dense film so that it does not mix with sex gases. Further, the interconnector 107 has stable electrical conductivity in both an oxidizing atmosphere and a reducing atmosphere. The interconnector 107 electrically connects the air electrode 113 of one fuel battery cell 105 and the fuel electrode 109 of the other fuel battery cell 105 in adjacent fuel battery cells 105 so that the adjacent fuel battery cells 105 are connected to each other. Are connected in series. Since the lead film 115 needs to have electronic conductivity and a thermal expansion coefficient close to that of other materials constituting the cell stack 101, the lead film 115 is made of Ni such as Ni / YSZ and a zirconia-based electrolyte material. Composed of composite material. The lead film 115 leads direct current power generated by the plurality of fuel cells 105 connected in series by the interconnector to the vicinity of the end of the cell stack 101.

(Description of SOFC module structure and function of each element)
Next, the SOFC module and the SOFC cartridge according to the present embodiment will be described with reference to FIGS. Here, FIG. 16 shows one mode of the SOFC module according to the present embodiment. FIG. 17 shows a cross-sectional view of one aspect of the SOFC cartridge according to the present embodiment.

  As illustrated in FIG. 16, the SOFC module 201 includes, for example, a plurality of SOFC cartridges 203 and a pressure vessel 205 that stores the plurality of SOFC cartridges 203. The SOFC module 201 has a fuel gas supply pipe 207 and a plurality of fuel gas supply branch pipes 207a. The SOFC module 201 includes a fuel gas discharge pipe 209 and a plurality of fuel gas discharge branch pipes 209a. The SOFC module 201 includes an oxidizing gas supply pipe (not shown) and an oxidizing gas supply branch pipe (not shown). The SOFC module 201 includes an oxidizing gas discharge pipe (not shown) and a plurality of oxidizing gas discharge branch pipes (not shown).

  The fuel gas supply pipe 207 is provided outside the pressure vessel 205 (not shown), and is connected to a fuel gas supply unit that supplies a predetermined gas composition and a predetermined flow rate of fuel gas corresponding to the power generation amount of the SOFC module 201. The plurality of fuel gas supply branch pipes 207a are connected. The fuel gas supply pipe 207 is configured to branch and guide a predetermined flow rate of fuel gas supplied from the fuel gas supply unit described above to a plurality of fuel gas supply branch pipes 207a. The fuel gas supply branch pipe 207 a is connected to the fuel gas supply pipe 207 and is connected to a plurality of SOFC cartridges 203. The fuel gas supply branch pipe 207a guides the fuel gas supplied from the fuel gas supply pipe 207 to the plurality of SOFC cartridges 203 at a substantially equal flow rate, and makes the power generation performance of the plurality of SOFC cartridges 203 substantially uniform. .

  The fuel gas discharge branch pipe 209a is connected to the plurality of SOFC cartridges 203 and to the fuel gas discharge pipe 209. The fuel gas discharge branch pipe 209 a guides the exhaust fuel gas discharged from the SOFC cartridge 203 to the fuel gas discharge pipe 209. The fuel gas discharge pipe 209 is connected to a plurality of fuel gas discharge branch pipes 209 a and a part thereof is disposed outside the pressure vessel 205. The fuel gas discharge pipe 209 guides the exhaust fuel gas led out from the fuel gas discharge branch pipe 209a at a substantially equal flow rate to the outside of the pressure vessel 205.

  Since the pressure vessel 205 is operated at an internal pressure of 0.1 MPa to about 1 MPa and an internal temperature of atmospheric temperature to about 550 ° C., the pressure vessel 205 is resistant to corrosion and resistance to oxidizing agents such as oxygen contained in the oxidizing gas. The possessed material is used. For example, a stainless steel material such as SUS304 is suitable.

  Here, in the present embodiment, a mode has been described in which a plurality of SOFC cartridges 203 are assembled and stored in the pressure vessel 205. However, the present invention is not limited to this. It can also be set as the aspect accommodated in the container 205. FIG.

(Description of SOFC cartridge structure and functions of each element)
As shown in FIG. 17, the SOFC cartridge 203 includes a plurality of cell stacks 101, a power generation chamber 215, a fuel gas supply chamber 217, a fuel gas discharge chamber 219, an oxidizing gas supply chamber 221, and an oxidizing gas discharge chamber. 223. The SOFC cartridge 203 includes an upper tube plate 225a, a lower tube plate 225b, an upper heat insulator 227a, and a lower heat insulator 227b. In the present embodiment, the SOFC cartridge 203 includes a fuel gas supply chamber 217, a fuel gas discharge chamber 219, an oxidizing gas supply chamber 221, and an oxidizing gas discharge chamber 223 as shown in FIG. The fuel gas and the oxidizing gas have a structure that flows between the inside and the outside of the cell stack 101, but this is not always necessary, for example, the inside and the outside of the cell stack flow in parallel. Alternatively, the oxidizing gas may flow in a direction orthogonal to the longitudinal direction of the cell stack.

  The power generation chamber 215 is an area formed between the upper heat insulator 227a and the lower heat insulator 227b. The power generation chamber 215 is an area in which the fuel cell 105 of the cell stack 101 is disposed, and electricity is generated by electrochemically reacting the fuel gas and the oxidizing gas. Further, the temperature in the vicinity of the center of the power generation chamber 215 in the longitudinal direction of the cell stack 101 is a high temperature atmosphere of about 700 ° C. to 1000 ° C. during the steady operation of the SOFC module 201.

  The fuel gas supply chamber 217 is an area surrounded by the upper casing 229a and the upper tube plate 225a of the SOFC cartridge 203. The fuel gas supply chamber 217 communicates with the fuel gas supply branch pipe 207a through a fuel gas supply hole 231a provided in the upper casing 229a. In the fuel gas supply chamber 217, one end of the cell stack 101 is disposed with the inside of the base tube 103 of the cell stack 101 open to the fuel gas discharge chamber 219. The fuel gas supply chamber 217 guides the fuel gas supplied from the fuel gas supply branch pipe 207a through the fuel gas supply hole 231a into the base tube 103 of the plurality of cell stacks 101 at a substantially uniform flow rate. The power generation performance of the cell stack 101 is made substantially uniform.

  The fuel gas discharge chamber 219 is an area surrounded by the lower casing 229b and the lower tube plate 225b of the SOFC cartridge 203. The fuel gas discharge chamber 219 communicates with the fuel gas discharge branch pipe 209a through a fuel gas discharge hole 231b provided in the lower casing 229b. In the fuel gas discharge chamber 219, the other end of the cell stack 101 is disposed with the inside of the base tube 103 of the cell stack 101 open to the fuel gas discharge chamber 219. The fuel gas discharge chamber 219 collects exhaust fuel gas that passes through the inside of the base tube 103 of the plurality of cell stacks 101 and is supplied to the fuel gas discharge chamber 219, and passes through the fuel gas discharge hole 231b. It leads to the discharge branch pipe 209a.

  Corresponding to the power generation amount of the SOFC module 201, a predetermined gas composition and a predetermined flow rate of oxidizing gas are branched to the oxidizing gas supply branch pipe and supplied to a plurality of SOFC cartridges 203. The oxidizing gas supply chamber 221 is a region surrounded by the lower casing 229b, the lower tube sheet 225b, and the lower heat insulator 227b of the SOFC cartridge 203. The oxidizing gas supply chamber 221 communicates with an oxidizing gas supply branch pipe (not shown) through an oxidizing gas supply hole 233a provided in the lower casing 229b. The oxidizing gas supply chamber 221 generates a predetermined flow rate of oxidizing gas supplied from an oxidizing gas supply branch pipe (not shown) through an oxidizing gas supply hole 233a through an oxidizing gas supply gap 235a described later. It leads to the chamber 215.

  The oxidizing gas discharge chamber 223 is a region surrounded by the upper casing 229a, the upper tube plate 225a, and the upper heat insulator 227a of the SOFC cartridge 203. The oxidizing gas discharge chamber 223 communicates with an oxidizing gas discharge branch pipe (not shown) through an oxidizing gas discharge hole 233b provided in the upper casing 229a. The oxidizing gas discharge chamber 223 allows the exhaust oxidizing gas supplied from the power generation chamber 215 to the oxidizing gas discharge chamber 223 via an oxidizing gas discharge gap 235b described later via the oxidizing gas discharge hole 233b. It leads to a third oxidizing gas discharge branch pipe (not shown).

  The upper tube plate 225a is arranged between the top plate of the upper casing 229a and the upper heat insulator 227a so that the upper tube plate 225a, the top plate of the upper casing 229a and the upper heat insulator 227a are substantially parallel to each other. It is fixed to the side plate. The upper tube sheet 225a has a plurality of holes corresponding to the number of cell stacks 101 provided in the SOFC cartridge 203, and the cell stacks 101 are inserted into the holes, respectively. The upper tube sheet 225a hermetically supports one end of the plurality of cell stacks 101 through one or both of a sealing member and an adhesive member, and also includes a fuel gas supply chamber 217 and an oxidizing gas discharge chamber 223. And is to be isolated.

  The lower tube plate 225b is disposed on the side plate of the lower casing 229b so that the lower tube plate 225b, the bottom plate of the lower casing 229b, and the lower heat insulator 227b are substantially parallel between the bottom plate of the lower casing 229b and the lower heat insulator 227b. It is fixed. The lower tube sheet 225b has a plurality of holes corresponding to the number of cell stacks 101 provided in the SOFC cartridge 203, and the cell stacks 101 are inserted into the holes, respectively. The lower tube sheet 225b hermetically supports the other end of the plurality of cell stacks 101 via one or both of a sealing member and an adhesive member, and also includes a fuel gas discharge chamber 219 and an oxidizing gas supply chamber 221. And is to be isolated.

  The upper heat insulator 227a is disposed at the lower end of the upper casing 229a so that the upper heat insulator 227a, the top plate of the upper casing 229a and the upper tube plate 225a are substantially parallel to each other, and is fixed to the side plate of the upper casing 229a. Yes. Further, the upper heat insulator 227a is provided with a plurality of holes corresponding to the number of cell stacks 101 provided in the SOFC cartridge 203. The diameter of the hole is set larger than the outer diameter of the cell stack 101. The upper heat insulator 227a has an oxidizing gas discharge gap 235b formed between the inner surface of this hole and the outer surface of the cell stack 101 inserted through the upper heat insulator 227a.

  The upper heat insulator 227a separates the power generation chamber 215 and the oxidizing gas discharge chamber 223, and the atmosphere around the upper tube sheet 225a is heated to reduce the strength and the corrosion caused by the oxidizing agent contained in the oxidizing gas. Suppresses the increase. The upper tube sheet 225a and the like are made of a metal material having high temperature durability such as Inconel, but the upper tube sheet 225a and the like are exposed to the high temperature in the power generation chamber 215, and the temperature difference in the upper tube sheet 225a and the like becomes large. This prevents thermal deformation. The upper heat insulator 227a guides the exhaust oxidizing gas exposed to a high temperature through the power generation chamber 215 to the oxidizing gas exhaust chamber 223 through the oxidizing gas discharge gap 235b.

  According to the present embodiment, the structure of the SOFC cartridge 203 described above allows the fuel gas and the oxidizing gas to flow oppositely on the inner side and the outer side of the cell stack 101. As a result, the exhaust oxidizing gas exchanges heat with the fuel gas supplied to the power generation chamber 215 through the inside of the base tube 103, and the upper tube plate 225a made of a metal material is buckled. It is cooled to a temperature that does not cause deformation and supplied to the oxidizing gas discharge chamber 223. In addition, the temperature of the fuel gas is raised by heat exchange with the exhaust oxidizing gas discharged from the power generation chamber 215 and supplied to the power generation chamber 215. As a result, the fuel gas preheated to a temperature suitable for power generation can be supplied to the power generation chamber 215 without using a heater or the like.

  The lower heat insulator 227b is disposed at the upper end of the lower casing 229b so that the lower heat insulator 227b, the bottom plate of the lower casing 229b, and the lower tube plate 225b are substantially parallel to each other, and is fixed to the side plate of the upper casing 229a. . Also, the lower heat insulator 227b is provided with a plurality of holes corresponding to the number of cell stacks 101 provided in the SOFC cartridge 203. The diameter of the hole is set larger than the outer diameter of the cell stack 101. The lower heat insulator 227b has an oxidizing gas supply gap 235a formed between the inner surface of this hole and the outer surface of the cell stack 101 inserted through the lower heat insulator 227b.

  The lower heat insulator 227b separates the power generation chamber 215 and the oxidizing gas supply chamber 221, and the atmosphere around the lower tube sheet 225b is heated to lower the strength and corrode by the oxidizing agent contained in the oxidizing gas. Suppresses the increase. The lower tube plate 225b and the like are made of a metal material having high temperature durability such as Inconel. However, the lower tube plate 225b and the like are exposed to a high temperature and the temperature difference in the lower tube plate 225b and the like is increased, so that the heat is deformed. It is something to prevent. The lower heat insulator 227b guides the oxidizing gas supplied to the oxidizing gas supply chamber 221 to the power generation chamber 215 through the oxidizing gas supply gap 235a.

  According to the present embodiment, the structure of the SOFC cartridge 203 described above allows the fuel gas and the oxidizing gas to flow oppositely on the inner side and the outer side of the cell stack 101. As a result, the exhaust fuel gas that has passed through the power generation chamber 215 through the interior of the base tube 103 is heat-exchanged with the oxidizing gas supplied to the power generation chamber 215, and the lower tube plate 225b made of a metal material. And the like are cooled to a temperature that does not cause deformation such as buckling, and supplied to the fuel gas discharge chamber 219. The oxidizing gas is heated by heat exchange with the exhaust fuel gas and supplied to the power generation chamber 215. As a result, the oxidizing gas heated to the temperature necessary for power generation can be supplied to the power generation chamber 215 without using a heater or the like.

  The direct-current power generated in the power generation chamber 215 is led out to the vicinity of the end of the cell stack 101 by the lead film 115 made of Ni / YSZ or the like provided in the plurality of fuel cells 105, and then the current collector rod (non-current) of the SOFC cartridge 203 is used. The current is collected via a current collecting plate (not shown) to the outside of each SOFC cartridge 203. The electric power derived to the outside of the SOFC cartridge 203 by the current collector rod is connected to the generated power of each SOFC cartridge 203 in a predetermined series number and parallel number, and is derived to the outside of the SOFC module 201. It is converted into predetermined AC power by an inverter that does not, and supplied to the power load.

2: Squeegee 3: Squeegee holder 3A: Divided squeegee holder 4: Position adjustment unit 5: Pressure sensor 6: Screen mask 7: Receiving roller 8: Control unit 9: Suppression roller 10: Substrate tube (molded body)
11: Screen printer 12: Screen printer 15: Core rod 16: Slurry

Claims (11)

A screen part that is placed on the vertical upper side of a cylindrical shaped body whose longitudinal direction is set horizontally and allows the slurry to pass through;
A squeegee extending in the longitudinal direction in contact with the upper surface of the screen portion;
A plurality of squeegee support portions that are arranged in the longitudinal direction, support the squeegee, and move the squeegee toward the molded body;
A position adjusting unit that moves in the vertical vertical direction while supporting the squeegee support unit;
A detection unit that is installed in the squeegee support unit and detects a pressing force applied to the molded body by the squeegee;
A control unit for controlling a movement amount of the squeegee support unit by the position adjustment unit based on the pressing force;
A screen printing apparatus comprising: A receiving part that rotatably supports both ends in the longitudinal direction of the molded body from vertically below;
Installed at a position farther from the center of the molded body than the receiving portion, supports both ends of the molded body so as to be able to rotate from vertically above, and suppresses both ends of the molded body;
The screen printing apparatus according to claim 1, further comprising: A receiving portion that is inserted into the cylindrical hollow portion of the molded body in the longitudinal direction and rotatably supports both longitudinal ends of the rod-shaped core rod provided to protrude from the end of the molded body;
Installed at a position farther from the center of the core rod than the receiving portion, supports both ends of the core rod so as to be rotatable from vertically above, and suppresses both ends of the core rod from being pressed. And
The screen printing apparatus according to claim 1, further comprising: A screen part that is placed on the vertical upper side of a cylindrical shaped body whose longitudinal direction is set horizontally and allows the slurry to pass through;
A squeegee extending in the longitudinal direction in contact with the upper surface of the screen portion;
A squeegee support that is arranged in the longitudinal direction, supports the squeegee, and moves the squeegee toward the molded body;
A receiving part that rotatably supports both ends in the longitudinal direction of the molded body from the vertically lower side;
Installed at a position farther from the center of the molded body than the receiving portion, supports both ends of the molded body so as to be able to rotate from vertically above, and suppresses both ends of the molded body;
A screen printing apparatus comprising: A screen part that is placed on the vertical upper side of a cylindrical shaped body whose longitudinal direction is set horizontally and allows the slurry to pass through;
A squeegee extending in the longitudinal direction in contact with the upper surface of the screen portion;
A squeegee support that is arranged in the longitudinal direction, supports the squeegee, and moves the squeegee toward the molded body;
A receiving portion that is inserted into the cylindrical hollow portion of the molded body in the longitudinal direction and rotatably supports both longitudinal ends of the rod-shaped core rod provided to protrude from the end of the molded body;
Installed at a position farther from the center of the core rod than the receiving portion, supports both ends of the core rod so as to be rotatable from vertically above, and suppresses both ends of the core rod from being pressed. And
A screen printing apparatus comprising:   The screen printing apparatus according to claim 3, wherein the core bar has a hollow portion disposed at least partially in the longitudinal direction between the receiving portions. A screen part that is placed on the vertical upper side of a cylindrical shaped body whose longitudinal direction is set horizontally and allows the slurry to pass through;
A squeegee extending in the longitudinal direction in contact with the upper surface of the screen portion;
A plurality of squeegee support portions that are arranged in the longitudinal direction, support the squeegee, and move the squeegee toward the molded body;
A position adjusting unit that moves in the vertical vertical direction while supporting the squeegee support unit;
A method for controlling a screen printing apparatus comprising:
Detecting a pressing force of the squeegee on the molded body in the squeegee support portion;
Controlling the amount of movement of the squeegee support portion by the position adjusting portion so that the pressing force falls within a range defined by a predetermined value based on the pressing force;
A control method for a screen printing apparatus. A screen part that is placed on the vertical upper side of a cylindrical shaped body whose longitudinal direction is set horizontally and allows the slurry to pass through;
A squeegee extending in the longitudinal direction in contact with the upper surface of the screen portion;
A squeegee support that is arranged in the longitudinal direction, supports the squeegee, and moves the squeegee toward the molded body;
A receiving part that rotatably supports both ends in the longitudinal direction of the molded body from vertically below;
A holding part installed at a position farther from the center of the molded body than the receiving part;
A screen printing method comprising:
The holding portion supports both ends of the molded body so as to be rotatable from vertically above; and
The pressing portion presses both end sides of the molded body to make the molded body a curved shape convex in the vertical direction; and
A screen printing method comprising: A screen part that is placed on the vertical upper side of a cylindrical shaped body whose longitudinal direction is set horizontally and allows the slurry to pass through;
A squeegee extending in the longitudinal direction in contact with the upper surface of the screen portion;
A squeegee support that is arranged in the longitudinal direction, supports the squeegee, and moves the squeegee toward the molded body;
A receiving portion that is inserted in the hollow portion of the molded body in the longitudinal direction and rotatably supports both ends in the longitudinal direction of the rod-shaped core rod provided to protrude from the end of the molded body;
A holding part installed at a position farther from the center of the molded body than the receiving part;
A screen printing method comprising:
The holding portion supports both end portions of the core rod so as to be rotatable from vertically above;
The pressing portion presses both end sides of the core rod to make the molded body a curved shape convex in the vertical direction; and
A screen printing method comprising:   A method for controlling the screen printing apparatus according to claim 7 or a screen printing method according to claim 8 or 9, wherein the molded body is formed into a film, and a fuel cell and an interface are formed on a surface of the molded body. A method for manufacturing a fuel cell stack, comprising: manufacturing a fuel cell stack having a connector formed thereon. A method for controlling the screen printing apparatus according to claim 7 or a screen printing method according to claim 8 or 9, wherein the molded body is formed into a film, and a fuel cell and an interface are formed on a surface of the molded body. Manufacturing a fuel cell stack in which a connector is formed;
Producing a fuel cell cartridge comprising the fuel cell stack;
A method of manufacturing a fuel cell cartridge having

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