JP6736280B2 - Screen printing apparatus, screen printing apparatus control method, screen printing method, fuel cell stack manufacturing method, and fuel cell cartridge manufacturing method - Google Patents

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 There is known a fuel cell that generates electric power by chemically reacting a fuel gas and oxygen. Among them, 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 the SOFC is, for example, city gas or natural gas composed of hydrogen (H ₂ ) and hydrocarbon-based gas such as carbon monoxide (CO), methane (CH ₄ ), petroleum, methanol, coal, etc. It is a gas produced by the gasification equipment from the carbonaceous raw material.

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 a space between adjacent fuel cells. And an interconnector formed on the. The fuel cell is formed by stacking a fuel electrode, a solid electrolyte, and an air electrode.

The base tube is made of a long ceramic, and when manufacturing the base tube, first, the composition and powder size of the ceramic material are adjusted, and a slurry is generated from the ceramic material and the solvent. Then, the slurry is extruded to form a soft base tube. Then, in order to make the substrate pipe hard enough to be transported, the flexible substrate pipe is dried. A film of the fuel electrode, the solid electrolyte and the interconnector is formed on the dried base tube by screen printing, and then the formed base tube is integrally fired. Further, an air electrode is formed into a film 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 the fuel cells and the interconnector are formed on the surface of the base tube is formed.
The substrate tube described below is a molded product as a support for a cylindrical solid oxide fuel cell, in which the fuel electrode, the solid electrolyte and the interconnector are formed by screen printing on the supporting molded product. In this case, the case further includes all cases where the air electrode is a molded body having a film formed thereafter.

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

JP, 2004-134180, A

As shown in FIGS. 13 and 14, when the slurry 16 is screen-printed on the surface of the cylindrical elongated base tube 10 with the screen mask 6 and the squeegee 2 extending in the longitudinal direction, the hollow of the base tube 10 is used. The 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 squeegee 2 supported by the squeegee holder 3 is pressed (printing pressure) against the base pipe when printing the slurry 16 on the surface of the base pipe 10, as shown in FIG. 14, the base is moved in the direction in which the printing pressure is applied. The central portion of the tube 10 flexes. As a result, a gap is generated between the squeegee 2 and the base pipe 10, and the slurry 16 cannot be uniformly and uniformly formed (printed) on the surface of the base pipe 10.

In addition, 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 both inside the squeegee holder and the base tube. It is difficult to properly arrange the magnets in the longitudinal direction. Further, since the size of the gap changes depending on the strength of the magnetic force of the magnet, it is difficult to make the gap uniform when using a permanent magnet whose magnetic force is difficult to adjust.

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 screen printing apparatus control method, 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 method for controlling the screen printing apparatus, the screen printing method, the method for manufacturing a fuel cell stack, and the method for manufacturing a fuel cell cartridge according to the present invention employ the following means.
That is, the screen printing apparatus according to the present invention is placed on the vertically upper side of a cylindrical molded body whose longitudinal direction is installed horizontally, and is brought into contact with a screen portion that allows slurry to pass through and a top surface of the screen portion. Squeegees extending in the longitudinal direction, a plurality of squeegee support portions arranged in the longitudinal direction, supporting the squeegee and moving the squeegee to the molded body side, and a vertical vertical direction while supporting the squeegee support portions. A position adjusting section for moving the squeegee supporting section, a detecting section installed in the squeegee supporting section for detecting a pressing force of the squeegee against the molded body, and a moving amount of the squeegee supporting section by the position adjusting section based on the pressing force. And a control unit for controlling.

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

In the above invention, a receiving portion that rotatably supports both end portions in the longitudinal direction of the molded body from a vertically lower side, and both end portions of the molded body that are installed farther from the center of the molded body than the receiving portion. It is also possible to further include a holding portion that rotatably supports the side from above in the vertical direction and presses both end sides of the molded body.

According to this configuration, the restraining portion installed on the end portion side of the molded body with respect to the receiving portion on which the molded body is placed supports the molded body from above and presses the end portion of the molded body. Therefore, the molded body is curved in a convex shape upward at the intermediate portion. Accordingly, when the molded body is pressed by the squeegee from above the molded body, the gap between the squeegee and the molded body can be reduced as compared with the case where the molded body is not curved upward.

In the above invention, a receptacle that rotatably supports both longitudinal direction end portions of a rod-shaped core rod that is inserted in the cylindrical hollow portion of the molded body in the longitudinal direction and that projects from the end portion of the molded body. Part, and the receiving part is installed at a position farther from the center of the core rod than the receiving part, rotatably supports both end sides of the core rod from vertically above, and supports both end sides of the core rod. You may further provide the pressing part to press.

According to this configuration, the restraining portion installed on the end side of the core rod with respect to the receiving portion on which the core rod is placed supports the core rod from above, and the end portion of the core rod is also supported. By pressing, the core rod bends upward in the middle portion. Accordingly, when the molded body is pressed by the squeegee from above the molded body, the gap between the squeegee and the molded body can be reduced as compared with the case where the molded body is not curved upward.

The screen printing apparatus according to the present invention is mounted on a vertically upper side of a cylindrical molded body having a longitudinal direction horizontally installed, and a screen portion that allows slurry to pass through, and the longitudinal portion that is abutted on an upper surface of the screen portion. A squeegee extending in a direction, arranged in the longitudinal direction, supporting the squeegee and moving the squeegee to the molded body side, and both longitudinal end portions of the molded body from the vertical lower side. A receiving portion that rotatably supports, and a receiving portion that is installed farther from the center of the molded body than the receiving portion, rotatably supports both end sides of the molded body from vertically above, and both ends of the molded body. And a pressing unit that presses the unit side.

The screen printing apparatus according to the present invention is mounted on a vertically upper side of a cylindrical molded body having a longitudinal direction horizontally installed, and a screen portion that allows slurry to pass through, and the longitudinal portion that is abutted on an upper surface of the screen portion. A squeegee extending in a direction, arranged in the longitudinal direction, supporting the squeegee and moving the squeegee to the molded body side, and a squeegee inserted in the cylindrical hollow portion of the molded body in the longitudinal direction, A receiving portion that rotatably supports both ends in the longitudinal direction of a rod-shaped core rod provided so as to project from the end portion of the molded body, and is installed at a position farther from the center of the core rod than the receiving portion. And both ends of the core rod are rotatably supported from above in the vertical direction, and pressing portions are pressed against both ends of the core rod.

In the above invention, in the core rod, a hollow portion may be arranged in at least a part 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 second moment of area between the solid portion and the hollow portion.

The control method of the screen printing apparatus according to the present invention is mounted on the vertical upper side of a cylindrical molded body whose longitudinal direction is set horizontally, and a screen portion for passing slurry, and abutting on the upper surface of the screen portion. Squeegees extending in the longitudinal direction, a plurality of squeegee support portions arranged in the longitudinal direction, which support the squeegee and move the squeegee to the molded body side, and vertical vertices while supporting the squeegee support portions. A method of controlling a screen printing apparatus, comprising: a position adjusting unit that moves in a direction, in the squeegee supporting unit, a step of detecting a pressing force of the squeegee against the molded body, and the pressing force 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.

A screen printing method according to the present invention, the longitudinal direction is placed on the vertical upper side of a cylindrical molded body installed horizontally, the screen portion for passing the slurry, and the longitudinal length abutted on the upper surface of the screen portion. A squeegee extending in a direction, a squeegee support portion that is disposed in the longitudinal direction, supports the squeegee, and moves the squeegee toward the molded body, and rotates both end sides in the longitudinal direction of the molded body from vertically below. A screen printing method, comprising: a receiving part that supports the receiving part, and a holding part installed at a position farther from the center of the molded body than the receiving part, wherein the holding part is provided on both end sides of the molded body. The method includes a step of rotatably supporting the molded body from above in the vertical direction, and a step of pressing the both end sides of the molded body to make the molded body into a curved shape that is convex upward in the vertical direction.

A screen printing method according to the present invention, the longitudinal direction is placed on the vertical upper side of a cylindrical molded body installed horizontally, the screen portion for passing the slurry, and the longitudinal length abutted on the upper surface of the screen portion. A squeegee that extends in the direction, a squeegee support portion that is disposed in the longitudinal direction, supports the squeegee, and moves the squeegee to the molded body side, and the squeegee is inserted in the hollow portion of the molded body in the longitudinal direction to form the squeegee. A receiving portion that rotatably supports both ends in the longitudinal direction of the rod-shaped core rod provided so as to project from the end portion of the body, and is installed at a position farther from the center of the molded body than the receiving portion. A screen printing method comprising a holding portion, wherein the holding portion rotatably supports both end portions of the core rod from above in a vertical direction, and the holding portion includes both end portions of the core rod. Pressing the side to make the molded body a convex curved shape in a vertically upward direction.

A method for manufacturing a fuel cell stack according to the present invention is a method for controlling the screen printing device described above, or a film is formed on the molded body by using the screen printing method described above, and a fuel cell is formed on the surface of the molded body. The method includes manufacturing a fuel cell stack having an interconnector formed therein.

A method of manufacturing a fuel cell cartridge according to the present invention is a method of controlling the screen printing apparatus described above, or a film of the molded body is formed by using the screen printing method described above, and a fuel cell and an interface are formed on the surface of the molded body. The method includes the steps of manufacturing a fuel cell stack having a connector formed therein, and manufacturing a fuel cell cartridge including the fuel cell stack.

According to the present invention, the gap formed between the squeegee and the molded body can be adjusted, and by keeping the gap constant, the slurry can be uniformly deposited in the longitudinal direction of the molded body.

It is a front view showing the screen printing device concerning a 1st embodiment of the present invention. 1 is a front view showing a screen printing apparatus according to a first embodiment of the present invention, showing a state in which a squeegee is in contact with a base pipe. FIG. 3 is a front view showing a squeegee holder of the screen printing apparatus according to the first embodiment of the present invention, a position adjustment unit according to the first example, and a pressure sensor. FIG. 4 is a vertical sectional view taken along the line IV-IV in FIG. 3. FIG. 3 is a front view showing a squeegee holder of the screen printing apparatus according to the first embodiment of the present invention, a position adjusting unit according to a second example, and a pressure sensor. FIG. 6 is a vertical sectional view taken along line VI-VI of FIG. 5. It is a front view which shows the screen printing apparatus which concerns on 2nd Embodiment of this invention. It is a front view showing the 1st modification of a core stick of a screen printing device concerning a 2nd embodiment of the present invention. It is a front view showing the 2nd modification of the core stick of the screen printing device concerning a 2nd embodiment of the present invention. It is a front view showing the 3rd modification of the core stick of the screen printing device concerning a 2nd embodiment of the present invention. It is a front view showing the 1st modification of the screen printing device concerning a 2nd embodiment of the present invention. It is a front view showing the 1st modification of the screen printing device concerning a 2nd embodiment of the present invention, and shows the state where the squeegee is contacting the base pipe. 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 in which the squeegee is contacting the base tube. It is a partial expanded sectional view showing a cell stack concerning one embodiment of the present invention. It is a perspective view showing the SOFC module concerning one embodiment of the present invention. It is a sectional view showing an SOFC cartridge concerning one embodiment of the present 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 device 11 is applied to a manufacturing device for a fuel cell substrate tube.
The long substrate 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”) 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 adjusting 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, for example, a long plate made of rubber, 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 vertically above the base tube 10 and in the longitudinal direction parallel to the base tube 10. The squeegee 2 can be curved along the bending shape of the base tube 10. In addition, in FIG. 1, the longitudinal direction of the base tube 10 and the squeegee 2 is the left-right direction of the paper surface.

The lower end surface of the squeegee 2 can contact the screen mask 6, and the upper portion is fixed to the squeegee holder 3. The squeegee 2 moves vertically with the squeegee holder 3 in the vertical direction in the vertical direction.

When the squeegee 2 contacts the screen mask 6, the squeegee 2 spreads the slurry 16 placed on the screen mask 6, and allows the slurry 16 to pass from the mesh portion 6 a of the screen mask 6.

The squeegee holder 3 sandwiches and fixes the plate-shaped squeegee 2. The squeegee holder 3 is divided into a plurality of pieces in the longitudinal direction, and is composed of a plurality of divided squeegee holders 3A. The split squeegee holder 3A is vertically movable in the vertical direction in the longitudinal direction.

Each of the divided squeegee holders 3A has a structure that is rotatable about a holder shaft 23 as shown in FIGS. 3 and 4 described later so that the squeegee 2 can be bent in the vertical vertical direction along the bending of the base tube 10. .. That is, the divided squeegee holder 3A rotates and tilts around the holder shaft 23 in accordance with 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 (front-back direction in the plane of FIG. 1).

The position adjusting unit 4 is arranged on a support frame of the screen printing device 11 (not shown), is installed along the longitudinal direction of the base pipe 10 for each divided squeegee holder 3A, and adjusts the position of each divided squeegee holder 3A. .. Specifically, the position adjusting unit 4 moves the split squeegee holder 3A closer to the lower base tube 10 side, or moves the split squeegee holder 3A away from the base tube 10. As a result, even if the base tube 10 is bent in the vertical vertical direction, the relative positions of the squeegee 2 with respect to the base tube 10 can be aligned and made uniform.

The pressure sensor 5 detects the contact pressure in the split squeegee holder 3A when the squeegee 2 is pressed against the base tube 10.

The screen mask 6 has 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 curved along with the bending of the base tube 10 together with the squeegee 2.

The core rod 15 has a circular horizontal cross section and is a long rod longer than the base tube 10. The core rod 15 is inserted into the hollow portion of the base pipe 10 in the longitudinal direction and projects from the end of the base pipe 10. The core rod 15 is preferably one whose surface properties do not change due to oxidation or the like, and one which has a strength such that plastic deformation does not occur when it is inserted into the base tube 10, and is preferably made of metal such as 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 pipe 10, and a gap is provided between the core rod 15 and the inner surface of the base pipe 10. Therefore, the core rod 15 can be easily inserted into the base pipe 10. The core rod 15 is rotated so that the moving speed of the screen mask 6 and the peripheral speed of the substrate tube 10 match.

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

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

Hereinafter, the squeegee holder 3, the position adjusting unit 4, and the pressure sensor 5 will be described in detail.
As shown in FIGS. 3 and 4, each split squeegee holder 3A includes a first connecting portion 21 and a fixing portion 22. Further, the position adjusting section 4 includes a ball screw mechanism 31, a second connecting section 32, a guide section 33, a fixing frame 34, and the like.

The second connecting portion 32 of the position adjusting portion 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 connecting portion 32, and the second connecting portion 32 is kept horizontal and connected to the ball screw 35. The ball screw 35 is screwed into a screw hole 36 provided in the fixed frame 34. As 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 connecting portion 32 and slides along a through hole 34A provided in the fixed frame 34. As a result, the upper end surface of the second connecting portion 32 can move only in the vertical vertical direction while maintaining the horizontal state. Further, the position of the split squeegee holder 3A is changed by driving the ball screw 35 of the position adjusting unit 4.

The second connecting portion 32 of the position adjusting portion 4 and the first connecting portion 21 of the split squeegee holder 3A are rotatably connected by a holder shaft 23. The first connecting portion 21 is provided with a bearing 24 around the holder shaft 23, and the holder shaft 23 is fixed by the second connecting portion 32. The axis of the holder shaft 23 is perpendicular to the plate surface 2A of the squeegee 2 extending in the longitudinal direction (front-back direction in the plane of FIG. 3). Thereby, the first connecting portion 21 is rotatable with respect to the second connecting portion 32, the position adjusting portion 4 is inclined with respect to the horizontal direction, and the height of the position adjusting portion 4 on the one end side in the longitudinal direction is adjusted. The height of the other end can be changed.

The first connecting portion 21 has an overhanging portion 21A whose upper portion overhangs the front surface, and a fixing portion 22 is provided below the overhanging portion 21A. The fixed portion 22 is connected to the first connecting portion 21 by the guide portion 25. The fixing portion 22 is vertically slidable along a through hole provided in the overhanging portion 21A.

The pressure sensor 5 is provided between the overhanging portion 21A and the fixed portion 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 projects from the lower surface of the fixed portion 22 toward the surface of the base pipe 10.

In addition, in the above-described embodiment, the case where the ball screw 35 is used to drive the position adjusting unit 4 in the vertical direction has been described, but the present invention is not limited to this example.
For example, as shown in FIGS. 5 and 6, the fixed frame 34 is provided with an air cylinder 41. Further, the air cylinder rod 42 is connected to the upper surface of the second connecting portion 32. The second connecting portion 32 may be moved in the vertical vertical direction by driving the air cylinder rod 42 by the air cylinder 41. The other constituent elements are the same as those in the above-described example, and thus the description thereof will be omitted.

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

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

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

In all the position adjusting parts 4, the position of the position adjusting parts 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 fall within the above-mentioned allowable pressure difference range.

As shown in FIG. 2, when the squeegee 2 is brought into contact with the screen mask 6 so that the intermediate portion of the base tube 10 bends downward, the position adjusting portions 4 near both ends of the base tube 10 have the base tube 10 in close proximity. The amount of movement closer to the base tube 10 is small, and the position adjusting portion 4 arranged in the intermediate portion of the base tube 10 has a large amount of movement close to 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 portion 4 of each split squeegee holder 3A arranged in the longitudinal direction, and the pressure sensitive sensor 5 can be adjusted. The slurry 16 can be uniformly deposited over the longitudinal direction of the substrate tube 10 by setting the pressure detected by the pressure sensor within the 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 directly placed 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, like the screen printing apparatus 11 according to the first embodiment, has a squeegee 2, a squeegee holder 3, a screen mask 6, a receiving roller 7, and the like. Equipped with.
In the present embodiment, for example, the squeegee holder 3 is composed of one piece without being divided into a plurality in the longitudinal direction.

As shown in FIG. 7, the screen printing device 12 further includes a pressing roller 9. The pressing roller 9 is installed closer to both ends of the core rod 15 in the longitudinal direction than the receiving roller 7. The pressing roller 9 supports the core rod 15 from above in the vertical direction so that the core rod 15 can rotate around the longitudinal axis.

The presser roller 9 is configured such that the upper surfaces of the core rod 15 on both end sides are located below the upper surfaces of the core rod 15 when the base tube 10 and the core rod 15 are in a horizontal state. The rod 15 is moved from above to below and fixed. Since the pressing rollers 9 are fixed to this position on both ends of the core rod 15, the core rod 15 and the base pipe 10 are in a state in which the longitudinal intermediate portions thereof are curved in a convex shape upward. At this time, the core rod 15 is subjected to a rotational force about the support position of the receiving rollers 7 on both end sides, and a bending moment is generated in the core rod 15 between the receiving rollers 7 on both end sides. 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 pressing roller 9 is fixed. The rotation driving of the core rod 15 and the base tube 10 is performed by a motor 13 provided at one end 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 substrate tube 10 and the squeegee 2 is brought into contact with the screen mask 6.

Accordingly, the bending moment generated when the base tube 10 is pushed downward by the abutting pressure from the squeegee 2 side is such that the core rod 15 and the intermediate portion in the longitudinal direction of the base tube 10 are curved upward in a convex shape. The direction is opposite to the bending moment generated in the state. That is, in the core rod 15, the rotational forces cancel each other at the support positions of the receiving rollers 7 on both end sides, that is, the bending moment does not occur in the core rod 15, so that the squeegee 2 moves the screen mask 6 to the screen mask 6. When the base tube 10 is pushed downward while being in contact with the base tube 10 via the core tube 15, the core rod 15 and the base tube 10 come to approach a horizontal state in the longitudinal direction. Therefore, in the screen printing process, it is possible to reduce the gap generated between the squeegee 2 and the base tube 10 near the longitudinal center of the base tube 10 as compared with the case where the base tube 10 is not curved upward in a convex shape. 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 uniformly deposited over the longitudinal direction of the base tube 10.

Here, the fixing position of the pressing roller 9 on both end sides of the core rod 15 is an amount by which the core rod 15 and the base tube 10 are curved upwardly in the intermediate portion in the longitudinal direction (curving amount in FIG. 7: H) or the value of the bending moment (M) generated in the core rod 15 can be used for management. Incidentally, in response to the situation where the base pipe 10 is pushed downward by the contact pressure from the squeegee 2 side, a convex curve capable of forming a uniform film of the slurry 16 in the longitudinal direction of the base pipe 10 in a preliminary test. By grasping conditions such as quantity (H) and moment (M), it is possible to manage properly.

By suppressing the vertical downward deformation of the vicinity of the center in the longitudinal direction due to the own weight of the core rod 15, it is possible to reduce the pressing of the pressing roller 9 and reduce the bending moment generated in the core bar 15. it can. The core rod 15 may be solid or hollow from one end to the other end. If the core rod 15 is hollow, it is possible to reduce deformation in the vertically downward direction near the center in the longitudinal direction due to the weight of the core rod 15. When the squeegee 2 is in contact with the base pipe 10 through the screen mask 6 and the base pipe 10 is pushed downward, the core rod 15 and the base pipe 10 are restrained so as to approach a horizontal state in the longitudinal direction. The pushing amount of the roller 9 can be reduced. Therefore, since there is a margin for the maximum amount of pushing, the adjustment range of the pushing amount of the pressing roller 9 can be widened and the adjustment becomes easy. Further, since the difference in deformation between the core rod 15 and the base tube 10 due to the difference in the contact state of the squeegee 2 is small, even if there is a characteristic distribution in the longitudinal direction of the base tube 10, complicated three-dimensional deformation is involved. Instead, by applying a small bending moment to the core rod 15, the core rod 15 can be adjusted to have a uniform state in the longitudinal direction. As a result, the gap generated between the squeegee 2 and the base pipe 10 can be reduced.

Further, the core rod 15 may be solid on the end side and hollow on the middle part. Since the solid member has a large second moment of area, by making the end side solid, there is no deformation or damage to the load applied by the receiving roller 7 and the restraining roller 9 as compared with the case of being hollow. Can bear. Further, since the end portion side is a region where the self-weight deformation is smaller than that in the middle portion, the amount of bending in the vertically downward direction in the vicinity of the center of the core rod 15 in the longitudinal direction is less affected even as a solid member.

In the core rod 15, in the case of combining a solid portion and a hollow portion, by changing the length of the hollow member, the bending shape in the vertical downward direction near the center in the longitudinal direction of the core rod 15 and the bending of the center The amount can be adjusted.

For example, as shown in FIG. 8, when the length L ₀ between the inner sides of the two receiving rollers 7 is a hollow member when the pressing roller 9 performs a predetermined pressing, the entire core rod 15 is convex. The base tube 10 can be made to have a convex curve in the entire longitudinal direction, and the whole body has a smaller second moment of area than the solid core rod, so that the convex curve can be made larger. can do. That is, it is possible to reduce the pressing force of the pressing roller 9 to obtain the required convex curved shape. Therefore, since there is a margin for the maximum amount of pushing, the adjustment range of the pushing amount of the pressing roller 9 can be widened and the adjustment becomes easy. In FIG. 8, the bending amount H _{0 is} near the center, and the bending amount H ₁ is near the ends.

In addition, as shown in FIG. 9, when a predetermined pressing is performed by the pressing roller 9, the middle 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 portion. In this case, since the hollow member having a small second moment of area is arranged in the intermediate portion, the convex curved shape can be increased in the central portion in the longitudinal direction as compared with 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 contrary, as shown in FIG. 10, L ₁ ″ in the middle portion of the length L ₀ between the inner sides of the two receiving rollers 7 is a solid member, and 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 area is arranged in the intermediate portion, the convex curved shape can be made smaller in the central portion in the longitudinal direction as compared with the example shown in FIG. That is, the bending amount H ₀ ″ near the center can be made relatively small.

That is, by arranging either the hollow portion or the solid portion in the vicinity of the center of the core rod 15 or setting the lengths of the hollow portion and the solid portion, a convex curve is formed in the center portion in the longitudinal direction. The shape can be adjusted. Therefore, it is possible to adjust the convex curved shape of the central portion of the core rod 15 in the longitudinal direction in response to the situation where the base pipe 10 is pushed downward by the abutting pressure from the squeegee 2 side. .. For this reason, it is possible to reduce the gap between the squeegee 2 and the base tube 10 that occurs near the center of the base tube 10 in the longitudinal direction. 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 uniformly deposited over the longitudinal direction of the base tube 10.

Note that in the present 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, various kinds of hollow portions or solid portions are set for the core rod 15, 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 position adjusting unit 4 arranged is smaller than that in the first embodiment, the influence of the fluctuation of the film thickness of the film formed by the position adjusting unit 4 is reduced, and the film thickness management is facilitated.

At this time, the split squeegee holder 3A rotates around the holder shaft 23 (see FIG. 4), and the squeegee 2 bends along the bending 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, instead of using the core rod 15, the base tube 10 may be placed directly on the receiving roller 7, and the holding roller 9 may support the base tube 10 from vertically above.

Hereinafter, an example of the SOFC according to the present embodiment will be described.
In the following, for convenience of description, the positional relationship between the respective constituent elements is specified using the expressions “upper” and “lower” with reference to the paper surface, but this need not always be the case with respect to the vertical direction. For example, the upward direction on the paper surface may correspond to the downward direction on the vertical direction. Further, the vertical direction on the paper surface may correspond to the horizontal direction perpendicular to the vertical direction.

(Structure of cylindrical cell stack)
First, the 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 battery cells 105 formed on the outer peripheral surface of the base tube 103, and an interconnector 107 formed between adjacent fuel battery cells 105. The fuel cell 105 is formed by stacking a fuel electrode 109, a solid electrolyte 111, and an air electrode 113. In addition, 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 cell 105 formed on the outer peripheral surface of the base tube 103. It has a lead film 115 electrically connected via a connector 107.

(Explanation of materials and functions of each component of the cell stack)
The substrate tube 103 is made of a porous material, and is, 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 unit 105, the interconnector 107, and the lead film 115, and allows the fuel gas supplied to the inner peripheral surface of the base tube 103 to pass through the pores of the base tube 103. Is diffused to the fuel electrode 109 formed on the outer peripheral surface of the.

The fuel electrode 109 is composed of an oxide of a composite material of Ni and a zirconia-based electrolyte material, and for example, Ni/YSZ is used. In this case, in the fuel electrode 109, Ni, which is a component of the fuel electrode 109, has a catalytic action on the fuel gas. This catalytic action causes a fuel gas supplied through the base pipe 103, for example, a mixed gas of methane (CH ₄ ) and steam to react with each other and reform it into hydrogen (H ₂ ) and carbon monoxide (CO). It is a thing. Further, the fuel electrode 109 interfaces hydrogen (H ₂ ) and carbon monoxide (CO) obtained by reforming and oxygen ions (O ²⁻ ) supplied via the solid electrolyte 111 with the solid electrolyte 111. It is an electrochemical reaction in the vicinity to generate water (H ₂ O) and carbon dioxide (CO ₂ ). At this time, the fuel cell unit 105 generates electricity by electrons emitted from oxygen ions.

The solid electrolyte 111 is mainly made of YSZ, which has gas-tightness that makes it difficult for gas to pass 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, LaSrMnO ₃ -based oxide or LaCoO ₃ -based oxide. The air electrode 113 dissociates oxygen in the oxidizing gas such as air supplied near the interface with the solid electrolyte 111 to generate oxygen ions (O ²⁻ ).

The interconnector 107 is composed of a conductive perovskite-type 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 a fuel gas and an oxide. It is a dense film so that it does not mix with the volatile gas. 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 the 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 has a thermal expansion coefficient close to that of other materials forming the cell stack 101, Ni such as Ni/YSZ and a zirconia-based electrolyte material are required. Composed of composite material. The lead film 115 guides the DC 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. 16 and 17. Here, FIG. 16 shows one mode of the SOFC module according to the present embodiment. In addition, FIG. 17 is a cross-sectional view of one aspect of the SOFC cartridge according to the present embodiment.

As shown in FIG. 16, the SOFC module 201 includes, for example, a plurality of SOFC cartridges 203 and a pressure container 205 that houses the plurality of SOFC cartridges 203. Further, the SOFC module 201 has a fuel gas supply pipe 207 and a plurality of fuel gas supply branch pipes 207a. Further, the SOFC module 201 has a fuel gas discharge pipe 209 and a plurality of fuel gas discharge branch pipes 209a. Further, the SOFC module 201 has an oxidizing gas supply pipe (not shown) and an oxidizing gas supply branch pipe (not shown). Further, the SOFC module 201 has 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 container 205 (not shown), and is connected to a fuel gas supply unit that supplies a fuel gas of a predetermined gas composition and a predetermined flow rate according to the power generation amount of the SOFC module 201. It is connected to a plurality of fuel gas supply branch pipes 207a. The fuel gas supply pipe 207 is for guiding the fuel gas at a predetermined flow rate, which is supplied from the above-mentioned fuel gas supply unit, into a plurality of fuel gas supply branch pipes 207a by branching. The fuel gas supply branch pipe 207 a is connected to the fuel gas supply pipe 207 and also to the 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 substantially equal flow rates, and makes the power generation performances 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 is also connected 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 the plurality of fuel gas discharge branch pipes 209 a, and a part of the fuel gas discharge pipe 209 is arranged outside the pressure vessel 205. The fuel gas discharge pipe 209 guides the exhaust fuel gas, which is discharged from the fuel gas discharge branch pipe 209a at a substantially uniform 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 about atmospheric temperature to about 550° C., it has durability and corrosion resistance to an oxidizing agent 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 collected and housed in the pressure container 205, but the present invention is not limited to this, and for example, the SOFC cartridges 203 are not collected and the pressure is increased. It may be configured to be housed in the container 205.

(Description of SOFC cartridge structure and function 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 and. The SOFC cartridge 203 also 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 has the fuel gas supply chamber 217, the fuel gas discharge chamber 219, the oxidizing gas supply chamber 221, and the oxidizing gas discharge chamber 223 arranged as shown in FIG. The fuel gas and the oxidizing gas are structured to flow inside and outside the cell stack 101 so as to face each other, but this is not always necessary. For example, the inside and outside of the cell stack may 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 a region formed between the upper heat insulator 227a and the lower heat insulator 227b. The power generation chamber 215 is a region in which the fuel cells 105 of the cell stack 101 are arranged, and a fuel gas and an oxidizing gas are electrochemically reacted to generate power. Further, the temperature of the power generation chamber 215 near the central portion in the longitudinal direction of the cell stack 101 becomes 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 a region surrounded by the upper casing 229a of the SOFC cartridge 203 and the upper tube sheet 225a. Further, the fuel gas supply chamber 217 is connected to the fuel gas supply branch pipe 207a through a fuel gas supply hole 231a provided in the upper casing 229a. Further, in the fuel gas supply chamber 217, one end of the cell stack 101 is arranged such that the inside of the base tube 103 of the cell stack 101 is 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 holes 231a into the base pipes 103 of the plurality of cell stacks 101 at a substantially uniform flow rate, and a plurality of fuel gas supply chambers 217a are provided. 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 sheet 225b of the SOFC cartridge 203. Further, 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. Further, in the fuel gas discharge chamber 219, the other end of the cell stack 101 is arranged such that the inside of the base tube 103 of the cell stack 101 is open to the fuel gas discharge chamber 219. The fuel gas discharge chamber 219 collects the exhaust fuel gas that passes through the insides of the base pipes 103 of the plurality of cell stacks 101 and is supplied to the fuel gas discharge chamber 219, and the fuel gas is discharged through the fuel gas discharge holes 231b. It leads to the discharge branch pipe 209a.

Corresponding to the power generation amount of the SOFC module 201, an oxidizing gas having a predetermined gas composition and a predetermined flow rate is branched into an 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 plate 225b, and the lower heat insulator 227b of the SOFC cartridge 203. In addition, the oxidizing gas supply chamber 221 is connected to 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 the 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 sheet 225a, and the upper heat insulator 227a of the SOFC cartridge 203. Further, the oxidizing gas discharge chamber 223 is connected to 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 supplies the discharged oxidizing gas, which is supplied from the power generation chamber 215 to the oxidizing gas discharge chamber 223 via the oxidizing gas discharge gap 235b described later, through the oxidizing gas discharge hole 233b. It leads to a third oxidizing gas discharge branch pipe (not shown).

The upper tube sheet 225a is arranged such that the upper tube sheet 225a and the upper plate of the upper casing 229a and the upper heat insulator 227a are substantially parallel to each other between the upper plate of the upper casing 229a and the upper heat insulator 227a. It is fixed to the side plate. Further, 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 portion of the plurality of cell stacks 101 through one or both of the seal member and the adhesive member, and at the same time, the fuel gas supply chamber 217 and the oxidizing gas discharge chamber 223. It isolates and.

The lower tube plate 225b is provided on a side plate of the lower casing 229b between the bottom plate of the lower casing 229b and the lower heat insulating body 227b so that the lower tube plate 225b and the bottom plate of the lower casing 229b are substantially parallel to each other. It is fixed. Further, the lower tube sheet 225b has a plurality of holes corresponding to the number of the 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 airtightly supports the other end portions of the plurality of cell stacks 101 via one or both of the seal member and the adhesive member, and the fuel gas discharge chamber 219 and the oxidizing gas supply chamber 221. It isolates and.

The upper heat insulator 227a is arranged 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. There is. Further, the upper heat insulator 227a is provided with a plurality of holes corresponding to the number of cell stacks 101 included in the SOFC cartridge 203. The diameter of this 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 insulating body 227a partitions the power generation chamber 215 and the oxidizing gas discharge chamber 223, and the atmosphere around the upper tube sheet 225a is heated to a high temperature, and the strength is reduced and corrosion due to an oxidizing agent contained in the oxidizing gas is caused. Suppress increasing. The upper tube sheet 225a and the like are made of a metal material having high temperature durability such as Inconel, but when the upper tube sheet 225a and the like are exposed to the high temperature in the power generation chamber 215, the temperature difference in the upper tube sheet 225a and the like becomes large. It prevents thermal deformation. Further, the upper heat insulator 227a guides the exhausted oxidizing gas that has passed through the power generation chamber 215 and is exposed to high temperature to the oxidizing gas exhaust chamber 223 through the oxidizing gas exhaust 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 inside and outside the cell stack 101 so as to face each other. As a result, the exhausted 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 sheet 225a made of a metal material causes buckling or the like. It is cooled to a temperature at which it is not deformed and supplied to the oxidizing gas discharge chamber 223. Further, the fuel gas is heated by heat exchange with the exhausted oxidizing gas discharged from the power generation chamber 215 and is 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 arranged at the upper end of the lower casing 229b such 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. .. Further, the lower heat insulator 227b is provided with a plurality of holes corresponding to the number of cell stacks 101 included in the SOFC cartridge 203. The diameter of this 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 partitions the power generation chamber 215 and the oxidizing gas supply chamber 221, and the atmosphere around the lower tube sheet 225b is heated to a high temperature and is not corroded by the oxidizing agent contained in the oxidizing gas. Suppress increasing. The lower tube sheet 225b and the like are made of a metal material having high temperature durability such as Inconel. However, when the lower tube sheet 225b and the like are exposed to high temperature, the temperature difference in the lower tube sheet 225b and the like becomes large, and thus the lower tube sheet 225b and the like are thermally deformed. To prevent. Further, 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 inside and outside the cell stack 101 so as to face each other. As a result, the exhausted fuel gas that has passed through the power generation chamber 215 through the inside of the base tube 103 undergoes heat exchange with the oxidizing gas supplied to the power generation chamber 215, and the lower tube sheet 225b made of a metal material. Etc. are cooled to a temperature at which they do not deform such as buckling and are supplied to the fuel gas discharge chamber 219. Further, the oxidizing gas is heated by heat exchange with the exhaust fuel gas and is supplied to the power generation chamber 215. As a result, the oxidizing gas heated to the temperature required for power generation can be supplied to the power generation chamber 215 without using a heater or the like.

The DC power generated in the power generation chamber 215 is led 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 battery cells 105, and then the collector rod (not connected to the SOFC cartridge 203). Current is collected via a collector plate (not shown) in the drawing) and taken out to the outside of each SOFC cartridge 203. The electric power led to the outside of the SOFC cartridge 203 by the collector rod is mutually connected to the generated electric power of each SOFC cartridge 203 in a predetermined number of series and parallel, and is led to the outside of the SOFC module 201, and is illustrated. Not converted into a predetermined AC power by an inverter or the like and supplied to a power load.

2: Squeegee 3: Squeegee holder 3A: Split squeegee holder 4: Position adjusting unit 5: Pressure sensor 6: Screen mask 7: Receiving roller 8: Control unit 9: Suppressing roller 10: Base tube (molded body)
11: Screen printing device 12: Screen printing device 15: Core bar 16: Slurry

Claims (13)

A screen part, which is placed on the vertical upper side of a cylindrical molded body whose longitudinal direction is horizontally installed, and which allows the slurry to pass therethrough,
A squeegee extending in the longitudinal direction that is in contact with the upper surface of the screen portion;
A plurality of squeegee support portions arranged in the longitudinal direction and supporting the squeegee,
A position adjusting part that moves the squeegee supporting part in the vertical up and down direction while supporting it;
A detection unit that is installed on the squeegee support unit and detects a pressing force of the squeegee on the molded body,
A control unit that controls the amount of movement of the squeegee support unit by the position adjustment unit based on the pressing force;
A receiving portion that rotatably supports both ends of the molded body in the longitudinal direction from below in a vertical direction,
Installed at a position farther from the center of the molded body than the receiving portion, rotatably supporting both end sides of the molded body from vertically above, and a pressing portion that presses both end sides of the molded body,
A screen printing apparatus including. A screen part, which is placed on the vertical upper side of a cylindrical molded body whose longitudinal direction is horizontally installed, and which allows the slurry to pass therethrough,
A squeegee extending in the longitudinal direction that is in contact with the upper surface of the screen portion;
A plurality of squeegee support portions arranged in the longitudinal direction and supporting the squeegee,
A position adjusting part that moves the squeegee support part in the vertical up and down direction while supporting the squeegee support part;
A detection unit that is installed on the squeegee support unit and detects a pressing force of the squeegee on the molded body,
A control unit that controls the amount of movement of the squeegee support unit by the position adjustment unit based on the pressing force;
A receiving portion that rotatably supports both longitudinal direction end portions of a rod-shaped core rod that is inserted in the cylindrical hollow portion of the molded body in the longitudinal direction and that is provided so as to project from the end portion of the molded body,
Installed at a position farther from the center of the core rod than the receiving portion, rotatably supporting both end sides of the core rod from vertically above and pressing both end sides of the core rod. Department,
A screen printing apparatus including. When the pressure detected by the detection unit is lower than a predetermined first threshold value, the control unit moves the position adjustment unit in a direction of approaching the molded body side, and the pressure detected by the detection unit is predetermined. 3. The screen printing device according to claim 1, wherein the position adjustment unit is moved in a direction away from the molded body when the position adjustment unit is higher than the second threshold value. A screen part, which is placed on the vertical upper side of a cylindrical molded body whose longitudinal direction is horizontally installed, and which allows the slurry to pass therethrough,
A squeegee extending in the longitudinal direction that is in contact with the upper surface of the screen portion;
A squeegee support portion arranged in the longitudinal direction and supporting the squeegee,
A receiving portion that rotatably supports both ends of the molded body in the longitudinal direction from the vertically lower side,
Installed at a position farther from the center of the molded body than the receiving portion, rotatably supporting both end sides of the molded body from vertically above, and a pressing portion that presses both end sides of the molded body,
A screen printing apparatus including. A screen part, which is placed on the vertical upper side of a cylindrical molded body whose longitudinal direction is horizontally installed, and which allows the slurry to pass therethrough,
A squeegee extending in the longitudinal direction that is in contact with the upper surface of the screen portion;
A squeegee support portion arranged in the longitudinal direction and supporting the squeegee,
A receiving portion that rotatably supports both longitudinal direction end portions of a rod-shaped core rod that is inserted in the cylindrical hollow portion of the molded body in the longitudinal direction and that is provided so as to project from the end portion of the molded body,
Installed at a position farther from the center of the core rod than the receiving portion, rotatably supporting both end sides of the core rod from vertically above and pressing both end sides of the core rod. Department,
A screen printing apparatus including. The screen printing device according to claim 2 or 5 , wherein a hollow portion is arranged in at least a part of the core rod in the longitudinal direction between the receiving portions. A screen part, which is placed on the vertical upper side of a cylindrical molded body whose longitudinal direction is horizontally installed, and which allows the slurry to pass therethrough,
A squeegee extending in the longitudinal direction that is in contact with the upper surface of the screen portion;
A plurality of squeegee support portions arranged in the longitudinal direction and supporting the squeegee,
A position adjusting part that moves the squeegee support part in the vertical up and down direction while supporting the squeegee support part;
A receiving portion that rotatably supports both ends of the molded body in the longitudinal direction from below in a vertical direction,
Installed at a position farther from the center of the molded body than the receiving portion, rotatably supporting both end sides of the molded body from vertically above, and a pressing portion that presses both end sides of the molded body,
A method for controlling a screen printing device comprising:
In the squeegee support, detecting the pressing force of the squeegee against the molded body,
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;
And a method for controlling a screen printing apparatus having the same. A screen part, which is placed on the vertical upper side of a cylindrical molded body whose longitudinal direction is horizontally installed, and which allows the slurry to pass therethrough,
A squeegee extending in the longitudinal direction that is in contact with the upper surface of the screen portion;
A plurality of squeegee support portions arranged in the longitudinal direction and supporting the squeegee,
A position adjusting part that moves the squeegee support part in the vertical up and down direction while supporting the squeegee support part;
A receiving portion that rotatably supports both longitudinal direction end portions of a rod-shaped core rod that is inserted in the cylindrical hollow portion of the molded body in the longitudinal direction and that is provided so as to project from the end portion of the molded body,
Installed at a position farther from the center of the core rod than the receiving portion, rotatably supporting both end sides of the core rod from vertically above and pressing both end sides of the core rod. Department,
A method for controlling a screen printing device comprising:
In the squeegee support, detecting the pressing force of the squeegee against the molded body,
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;
And a method for controlling a screen printing apparatus having the same. The step of controlling the amount of movement of the squeegee support portion, when the pressure detected by the detection portion is lower than a predetermined first threshold value, moves the position adjustment portion in a direction of approaching the molded body side, and performs the detection. The control method of the screen printing device according to claim 7, wherein the position adjustment unit is moved in a direction away from the molded body when the pressure detected by the unit is higher than a predetermined second threshold value. A screen part, which is placed on the vertical upper side of a cylindrical molded body whose longitudinal direction is horizontally installed, and which allows the slurry to pass therethrough,
A squeegee extending in the longitudinal direction that is in contact with the upper surface of the screen portion;
A squeegee support portion arranged in the longitudinal direction and supporting the squeegee,
A receiving portion that rotatably supports both ends of the molded body in the longitudinal direction from below in a vertical direction,
A restraining portion installed at a position farther from the center of the molded body than the receiving portion,
A screen printing method using a screen printing device comprising:
A step in which the restraining portion rotatably supports both ends of the molded body from above in the vertical direction;
A step in which the suppressing portion presses both end sides of the molded body to make the molded body a convex curved shape in a vertically upward direction;
A screen printing method having a. A screen part, which is placed on the vertical upper side of a cylindrical molded body whose longitudinal direction is horizontally installed, and which allows the slurry to pass therethrough,
A squeegee extending in the longitudinal direction that is in contact with the upper surface of the screen portion;
A squeegee support portion arranged in the longitudinal direction and supporting the squeegee,
A receiving portion that rotatably supports both end portions in the longitudinal direction of the rod-shaped core rod that is inserted in the hollow portion of the molded body in the longitudinal direction and that is provided so as to project from the end portion of the molded body,
A restraining portion installed at a position farther from the center of the molded body than the receiving portion,
A screen printing method using a screen printing device comprising:
A step in which the restraining portion rotatably supports both end sides of the core rod from vertically above;
A step in which the pressing portion presses both end sides of the core rod to make the molded body a convex curved shape in a vertically upward direction;
A screen printing method having a. A film forming process is performed on the molded body by using the method for controlling the screen printing apparatus according to any one of claims 7 to 9 or the screen printing method according to claim 10 or 11 , A method of manufacturing a fuel cell stack, comprising the step of manufacturing a fuel cell stack in which fuel cells and interconnects are formed on the surface of the molded body. A film forming process is performed on the molded body by using the method for controlling the screen printing apparatus according to any one of claims 7 to 9 or the screen printing method according to claim 10 or 11 , Manufacturing a fuel cell stack in which fuel cells and interconnects are formed on the surface of the molded body;
Manufacturing a fuel cell cartridge comprising the fuel cell stack;
And a method for manufacturing a fuel cell cartridge having the same.

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