JP5065534B2 - Sealing device and method for manufacturing honeycomb structure - Google Patents

Description

  The present invention relates to a sealing device and a method for manufacturing a honeycomb structure.

  Conventionally, honeycomb filter structures are widely known for DPF (Diesel particulate filter) and the like. This honeycomb filter structure has a structure in which one end side of some through holes of a honeycomb structure having a large number of through holes is sealed with a sealing material, and the other end side of the remaining through holes is sealed with a sealing material. Patent Document 1 discloses a method for manufacturing such a honeycomb filter structure. In Patent Document 1, the sealing material is supplied to the end portion of the through hole of the honeycomb structure by pressing the sealing material with the piston 8 against one end of the honeycomb structure 1 disposed in the cylinder 7.

Japanese Patent Publication No. 63-24731

  However, in the conventional method, the uniformity of the sealing length of the sealing material in each through hole is not sufficient.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a sealing device and a method for manufacturing a honeycomb filter excellent in uniformity of sealing length.

  The sealing device according to the present invention includes a main body having a recess and a communication path that opens to the inner surface of the recess, an elastic plate disposed in the main body so as to cover the recess, and an excitation fixed to the main body. A sealing device. The vibration exciter includes a motor having a rotating shaft and an eccentric weight connected to the rotating shaft.

  According to the present invention, the sealing material can be supplied to the through holes of the honeycomb structure by the following procedure. First, the elastic plate is deformed along the concave portion of the main body portion by discharging the fluid in the concave portion of the main body portion through the communication path, thereby forming the concave portion of the elastic plate. Next, a sealing material is supplied into the recess of the elastic plate. Subsequently, the sealing material is vibrated by a vibration exciter having an eccentric weight, whereby the sealing material can be spread over the entire area in the recess. Subsequently, one end face of the honeycomb structure is disposed at a position facing the recess. Subsequently, the elastic plate is moved toward one end surface of the honeycomb structure by supplying a fluid between the main body portion and the elastic plate through the communication path. Thereby, the sealing material in the recessed part of an elastic board is supplied in the through-hole of a honeycomb structure.

  Thereafter, by further supplying fluid between the main body portion and the elastic plate via the communication path, the elastic plate can be deformed in a convex shape in a direction opposite to the concave portion of the main body portion. Thereby, the honeycomb structure can be easily separated from the main body.

  Here, the elastic plate is preferably a rubber plate. Thereby, the elastic plate can be easily deformed.

  Further, it is preferable to further include a mask disposed on the elastic plate and having a plurality of through holes.

  Thereby, it becomes easy to supply a sealing material with respect to the desired through-hole group of a honeycomb structure.

A method for manufacturing a honeycomb structure having a plurality of through holes whose ends are sealed according to the present invention is a method for manufacturing a honeycomb structure having a plurality of through holes whose ends are sealed,
A step of preparing an elastic plate arranged so as to cover the concave portion with respect to the main body portion having the concave portion and the communication path opened in the inner surface of the concave portion;
Forming a recess in the elastic plate by discharging the fluid in the recess through the communication path;
Supplying a sealing material into the recess of the elastic plate;
Applying vibration to the sealing material in the recess of the elastic plate;
After the step of disposing the one end face of the honeycomb structure having a plurality of through holes at a position facing the concave portion, and the step of applying the vibration, between the body portion and the elastic plate via the communication path And supplying the fluid to the honeycomb structure to move the elastic plate toward one end face of the honeycomb structure.
In the step of applying the vibration, the sealing material is vibrated by rotating a rotating shaft to which an eccentric weight is connected.

  According to this, the sealing material can be spread over the entire area in the recess by vibration accompanying the rotation of the eccentric weight, and the uniformity of the thickness can be enhanced.

Here, after the elastic plate moving step,
It is preferable that the method further includes a step of separating the elastic plate and the one end surface by causing the elastic plate to protrude toward the one end surface.

  According to this, after the plate and the one end surface of the honeycomb structure are brought close to each other by filling the sealing agent, a part of the plate protrudes toward the one end surface, so that the honeycomb structure is separated from the plate. Becomes easy. Therefore, it is excellent in production efficiency.

  Further, in the elastic plate moving step, a mask is interposed between the one end surface and the elastic plate, and the mask communicates with only a part of the plurality of through holes of the honeycomb structure. According to this, it is easy to seal one end of some through holes.

  ADVANTAGE OF THE INVENTION According to this invention, the sealing apparatus etc. which were excellent in the uniformity of sealing length are provided.

FIG. 1 is a schematic sectional view of a sealing device according to an embodiment of the present invention. FIG. 2 is a view taken along the line II-II of the sealing device of FIG. 3A is a perspective view of a honeycomb structure used in the sealing device of FIG. 1, and FIG. 3B is a partially enlarged view of FIG. 4 (a) is a perspective view of the mask of FIG. 1, and FIG. 4 (b) is a partially enlarged view of FIG. 4 (a). 5A is a partial cross-sectional view for explaining the operation of the sealing device of FIG. 1, and FIG. 5B is a partial cross-sectional view subsequent to FIG. 6A is a partial cross-sectional view subsequent to FIG. 5B, and FIG. 6B is a partial cross-sectional view subsequent to FIG. 6A. 7A is a partial cross-sectional view subsequent to FIG. 6B, and FIG. 7B is a partial cross-sectional view subsequent to FIG. 7A. 8A is a partial cross-sectional view subsequent to FIG. 7B, and FIG. 8B is a partial cross-sectional view subsequent to FIG. 7A.

  Preferred embodiments of a sealing device according to the present invention will be described with reference to the drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and a duplicate description is omitted.

  FIG. 1 is a schematic cross-sectional view of a sealing device 100 according to an example of this embodiment. The sealing device 100 according to the present embodiment mainly includes a main body unit 10, an elastic plate 20, a pump 50, a holding unit 80, and a vibration exciter 140.

  The main body 10 is made of a rigid material. Examples of the rigid material include metals such as stainless steel and polymer materials such as fiber reinforced plastic. A recess 10 d is formed on the upper surface 10 a of the main body 10. In the present embodiment, the shape of the recess 10d is a columnar shape as shown in FIGS. The side surface 10b of the recess 10d is perpendicular to the upper surface 10a of the main body 10 and the bottom surface 10c is parallel. The diameter of the recess 10d can be set to 100 to 320 mm, for example. The depth of the recess 10d can be set to 0.2 to 20 mm, for example.

  The elastic plate 20 is disposed on the upper surface 10a of the main body 10 so as to cover the opening surface of the recess 10d. The elastic plate 20 has elasticity and can be easily deformed. As the elastic plate 20, a rubber plate is preferable. Examples of the rubber include natural rubber, and synthetic rubber such as styrene butadiene rubber, butadiene rubber, butyl rubber, ethylene propylene rubber, nitrile rubber, chloroprene rubber, fluorine rubber, silicone rubber, and urethane rubber. Although the thickness of the elastic board 20 is not specifically limited, For example, it can be 0.3-3.0 mm.

  The elastic plate 20 is fixed to the main body 10 by a ring member 25 and a bolt 31. The ring member 25 has an opening 25a at a position corresponding to the concave portion 10d of the main body 10 and thereby has an annular shape. And the ring member 25 is arrange | positioned on the elastic board 20 so that the center part (opposite part with the recessed part 10d) in the elastic board 20 may be exposed. Accordingly, the peripheral portion of the elastic plate 20 is sandwiched between the main body portion 10 and the ring member 25. Through-holes h are formed in the ring member 25 and the elastic plate 20, and screw holes j corresponding to the through-holes h are formed in the main body portion 10, and bolts 31 pass through these through-holes h. The peripheral portion of the elastic plate 20 is fixed in close contact with the portion around the recess 10d on the upper surface 10a of the main body 10 by being screwed into the screw hole j and fixed.

  As shown in FIGS. 1 and 2, the inner diameter of the opening 25 a of the ring member 25 is preferably larger than the inner diameter of the recess 10 d of the main body 10.

  The main body 10 further has a communication path 10e that opens to the bottom surface 10c of the recess 10d. In the present embodiment, the communication path 10e opens to the bottom surface 10c of the recess 10d, but may be open to the inner surface of the recess 10d. For example, the communication path 10e may open to the side surface 10b of the recess 10d. Further, the shape and number of openings of the communication passage 10e are not particularly limited.

  A pump 50 is connected to the communication path 10e via a connection pipe 14.

  The pump 50 includes a cylinder 51, a piston 53 disposed in the cylinder 51, and a piston rod 54 connected to the piston 53. A motor 55 that reciprocates the piston rod 54 in the axial direction is connected to the piston rod 54. The piston rod 54 may be moved manually.

  In the present embodiment, a closed space V formed by the main body 10, the connection pipe 14, and the cylinder 51 is formed between the elastic plate 20 and the piston 53, and a fluid is contained in the closed space V. FL is filled. The fluid FL is not particularly limited, but a liquid is preferable, and spindle oil or the like is particularly preferable. The fluid FL may be a gas such as air. Then, by moving the piston 53, the fluid FL can be discharged from the concave portion 10d of the main body portion 10, and the fluid FL can be supplied into the concave portion 10d.

  A holding unit 80 is provided on the main body unit 10. The holding unit 80 includes a holding tool 81 that holds the honeycomb structure 70 and a pneumatic cylinder 82 to which the holding tool 81 is connected.

  As shown in FIG. 1, the holder 81 holds the honeycomb structure 70 so that the opening surface on one side of the through hole 70 a faces the elastic plate 20 and the recess 10 d.

  The pneumatic cylinder 82 has a cylinder 82a extending in the vertical direction and a piston 82b provided in the cylinder 82a. By adjusting the pressure supplied from the outside, the pressure on both the upper and lower sides of the piston 82b can be adjusted. It has become. As a result, the pneumatic cylinder 82 can move the holder 81 in the direction in which the honeycomb structure 70 and the elastic plate 20 approach each other and in the direction in which they move away from each other. In addition, the pneumatic cylinder 82 allows the honeycomb structure 70 to be in close contact with the mask 170 described later by pressing the holder 81 downward with a predetermined force in accordance with the gas supply pressure before and after the piston 82b. it can. Furthermore, the pneumatic cylinder 82 can also permit the holder 81 to move freely in the vertical direction by releasing the pressure before and after the piston. That is, the holding unit 80 can switch between a state in which the honeycomb structure 70 held by the holder 81 can freely move upward and a state in which the honeycomb structure 70 is fixed to the main body 10. .

  An example of the honeycomb structure 70 used in the present embodiment is a cylindrical body in which a large number of through holes 70a are arranged substantially in parallel as shown in FIG. The cross-sectional shape of the through hole 70a is a square as shown in FIG. The plurality of through holes 70a are arranged in a square arrangement in the honeycomb structure 70, that is, such that the central axis of the through hole 70a is located at the apex of the square, respectively. The square size of the cross section of the through hole 70a can be set to 0.8 to 2.5 mm on a side, for example.

  Further, the length of the honeycomb structure 70 in the direction in which the through holes 70a extend is not particularly limited, but may be, for example, 40 to 350 mm. Moreover, the outer diameter of the honeycomb structure 70 is not particularly limited, but may be, for example, 100 to 320 mm.

  The material of the honeycomb structure 70 is not particularly limited, but a ceramic material is preferable from the viewpoint of high temperature resistance. Examples thereof include alumina, silica, mullite, cordierite, glass, oxides such as aluminum titanate, silicon carbide, silicon nitride, and metal. The aluminum titanate can further contain magnesium and / or silicon. Such a honeycomb structure 70 is usually porous.

  Further, the honeycomb structure 70 may be a green molded body (unfired molded body) that becomes a ceramic material as described above by being fired later. A green molded object contains the inorganic compound source powder which is a ceramic raw material, organic binders, such as methylcellulose, and the additive added as needed.

  For example, in the case of a green molded body of aluminum titanate, the inorganic compound source powder includes an aluminum source powder such as α-alumina powder, and a titanium source powder such as anatase-type or rutile-type titania powder. Furthermore, magnesium source powders such as magnesia powder and magnesia spinel powder and / or silicon source powders such as silicon oxide powder and glass frit can be included.

  Examples of the organic binder include celluloses such as methylcellulose, carboxymethylcellulose, hydroxyalkylmethylcellulose, and sodium carboxymethylcellulose; alcohols such as polyvinyl alcohol; and lignin sulfonate.

  Examples of the additive include a pore-forming agent, a lubricant and a plasticizer, a dispersant, and a solvent.

  Examples of the pore-forming agent include carbon materials such as graphite; resins such as polyethylene, polypropylene, and polymethyl methacrylate; plant materials such as starch, nut shells, walnut shells, and corn; ice; and dry ice.

  Examples of the lubricant and the plasticizer include alcohols such as glycerin; higher fatty acids such as caprylic acid, lauric acid, palmitic acid, arachidic acid, oleic acid and stearic acid; and stearic acid metal salts such as Al stearate.

  Examples of the dispersant include inorganic acids such as nitric acid, hydrochloric acid and sulfuric acid; organic acids such as oxalic acid, citric acid, acetic acid, malic acid and lactic acid; alcohols such as methanol, ethanol and propanol; ammonium polycarboxylate, poly Surfactants such as oxyalkylene alkyl ethers are listed.

  As the solvent, for example, alcohols such as methanol, ethanol, butanol and propanol; glycols such as propylene glycol, polypropylene glycol and ethylene glycol; and water can be used.

  The mask 170 is disposed in the opening 25 a of the ring member 25 on the elastic plate 20. The material of the mask 170 is not specifically limited, For example, a metal and resin are mentioned.

  FIG. 4A shows an example of the mask 170 used in this embodiment. The mask 170 is a circular plate-like member and has a large number of through-holes 170a extending in the thickness direction. The cross-sectional shape of the through hole 170a is a square corresponding to the through hole 70a (see FIG. 3B) of the honeycomb structure 70, as shown in FIG. 4B. The plurality of through holes 170a are arranged in a staggered manner as shown in FIG. 4B, and each through hole 170a is formed of the plurality of through holes 70a arranged in a square shape in FIG. 3B. These are disposed to face only the plurality of through holes 70ai that are not adjacent to each other in the vertical and horizontal directions. In order to facilitate positioning of the through hole 170a of the mask 170, the mask 170 is formed with an orientation flat 170b, and the ring member 25 may be provided with a projection 25b corresponding to the orientation flat correspondingly. . As shown in FIG. 1, the outer diameter of the mask 170 is preferably larger than the inner diameter of the recess 10 d of the main body 10.

  The vibration exciter 140 is fixed to the main body 10. Specifically, the vibration exciter 140 has a motor 141. The motor 141 has a rotating shaft 142 arranged in the vertical direction, and rotates the rotating shaft 142. An eccentric weight 147 is fixed to the rotating shaft 142.

The eccentric weight 147 has a structure in which the center of the rotation shaft 142 and the center of gravity of the eccentric weight 147 do not coincide with each other when viewed from the axial direction of the rotation shaft 142. The eccentric distance r, which is the distance between the center and the center of gravity, can be set to 5 to 30 mm, for example. The weight m of the eccentric weight 147 can be set to 0.5 to 2 kg, for example. Moreover, the rotation speed of the rotating shaft 142 can be 100-400 rpm, for example. These parameters are preferably set so that the excitation force (mrω ² , where ω is an angular velocity) and amplitude generated by the shaker 140 are 5 to 20 N and 5 to 30 mm, respectively.

  Further, the vibration exciter 140 can freely rotate a base 144 fixed to the side surface of the main body 10, a fixture 143 that fixes the motor 141 and the base 144, and a portion of the rotary shaft 142 between the motor 141 and the eccentric weight. And a fixture 145 for fixing the bearing 146 to the pedestal 144.

  The motor 141 can have a gear or the like for adjusting the rotation speed of the rotation shaft 142.

(how to use)
Next, a method for using the sealing device 100 described above and a method for manufacturing the sealed honeycomb structure will be described. First, from the state of FIG. 1, the pneumatic cylinder 82 is driven in advance and pulled up above the holder 81 that holds the honeycomb structure 70 and the mask 170 is removed from the elastic plate 20 to Thus, the elastic plate 20 is arranged so as to cover the recess 10d. Next, by pulling the piston 53 of the pump 50 downward, the fluid FL is discharged downward from the recess 10 d of the main body 10. As a result, as shown in FIG. 5A, the elastic plate 20 is deformed and is brought into close contact with the side surface 10b and the bottom surface 10c of the concave portion 10d, whereby the concave portion 20d of the elastic plate 20 is formed.

  Subsequently, the sealing material 130 is supplied into the recess 20 d of the elastic plate 20.

(Sealing material)
The sealing material 130 is not particularly limited as long as it can close the end of the through hole 70a of the honeycomb structure 70, but is preferably liquid. For example, as the sealing material, a slurry containing a ceramic material or a ceramic raw material, a binder, preferably a lubricant, and a solvent can be exemplified. Examples of the ceramic material include the constituent material of the above-described honeycomb structure and the raw material thereof.

  Examples of the binder include celluloses such as methylcellulose, carboxymethylcellulose, hydroxyalkylmethylcellulose, and sodium carboxymethylcellulose; alcohols such as polyvinyl alcohol; and organic binders such as lignin sulfonate. The usage-amount of a binder can be 0.1-10 mass%, for example, when a sealing material is 100 mass%.

  Examples of the lubricant include alcohols such as glycerol, higher fatty acids such as caprylic acid, lauric acid, palmitic acid, alginic acid, oleic acid and stearic acid, and stearic acid metal salts such as Al stearate. The addition amount of the lubricant is usually 0 to 10% by mass, preferably 1 to 10% by mass, and more preferably 1 to 5% by mass with respect to 100% by mass of the sealing material.

As the solvent, for example, alcohols such as methanol, ethanol, butanol and propanol; glycols such as propylene glycol, polypropylene glycol and ethylene glycol; and water can be used. Of these, water is preferable, and ion-exchanged water is more preferably used from the viewpoint of few impurities. The usage-amount of a solvent can be 15-40 mass%, for example, when a sealing material is 100 mass%.
The viscosity of the sealing material is preferably 5 to 50 Pa · s at 23 ° C. in a coaxial double cylinder method using a rotational viscometer.

  When such a sealing material 130 is supplied into the recess 20d, normally, as shown in FIG. 5 (a), it does not spread in the horizontal direction in the recess 20d, and the thickness tends to be non-uniform. This becomes even more apparent when the solvent concentration is lowered and the sealing material is dried quickly. If the sealing step is performed as it is, the length of the sealing portion becomes non-uniform or a sealing failure is likely to occur.

  Therefore, the motor 141 of the vibration exciter 140 is driven to rotate the rotating shaft 142. Since the eccentric weight 147 is fixed to the rotating shaft 142, the rotating shaft 142 is vibrated when the rotating shaft 142 rotates. In this embodiment, since the rotating shaft 142 is arranged vertically, the vibration direction is the horizontal plane direction. This vibration is transmitted to the main body 10 through the bearing 146, the fixtures 145, 143, and the like, and is transmitted to the sealing material 130 on the elastic plate 20, and the sealing material 130 is vibrated in the horizontal direction. Thereby, as shown in FIG. 5B, the sealing material 130 can be spread throughout the recess 20d. Moreover, the flatness of the surface of the sealing material 130 is also improved.

  Subsequently, as shown in FIG. 6A, a mask 170 is set on the elastic plate 20 so as to cover the concave portion 10 d of the main body 10, and then the holding tool 81 is moved downward by the pneumatic cylinder 82. By bringing the honeycomb structure 70 into contact with the mask 170, a part of the through holes 70 a of the honeycomb structure 70 and the through holes 170 a of the mask 170 are communicated, and further, the holding tool 81 is pressed downward by the pneumatic cylinder 82. Then, the honeycomb structure 70 is fixed to the mask 170 and the main body 10.

  Next, by moving the piston of the pump 50 upward, the fluid FL is supplied between the recess 10d and the elastic plate 20 via the communication path 10e, and as shown in FIG. The elastic plate 20 is moved toward the mask 170. This step is preferably performed until the elastic plate 20 comes into contact with the mask 170 and the deformation of the elastic plate 20 is eliminated, as shown in FIG.

  Thereby, the sealing material 130 is supplied into a part of the through holes 70a of the honeycomb structure 70 through the through holes 170a of the mask 170, and the sealing portion 70p is formed.

  Subsequently, after the downward pressing of the honeycomb structure 70 by the pneumatic cylinder 82 is stopped so that the honeycomb structure 70 can freely move upward, the piston 53 is further raised to move the elastic plate 20 and the main body portion 10 together. Further, fluid FL is supplied. Thereby, as shown in FIG. 7B, the elastic plate 20 is deformed in a convex shape upward, and the mask 170 and the honeycomb structure 70 move upward. At this time, since the peripheral portion of the elastic plate 20 deformed into a convex shape is separated from the mask 170, the mask 170 and the honeycomb structure 70 can be easily separated from the main body portion 10. In this case, production efficiency can be increased, and the sealed honeycomb structure can be manufactured at low cost.

  Subsequently, after removing the honeycomb structure 70 from the holder 81, the top and bottom are turned over and the honeycomb structure 70 is again held by the holder 81. Next, the same operation is performed using the mask 170 ′ in which the mask 170 and the through holes 170 a are arranged in a zigzag arrangement opposite to each other. Thereby, as shown to (a) of FIG. 8, the other end side of the remaining through-holes 70a is sealed by the sealing material, and the sealing part 70p is formed. Subsequently, the mask 170 ′ and the honeycomb structure 70 can be easily separated from the main body 10 and the elastic plate 20 by deforming the elastic plate 20 in a convex shape in the same manner as described above.

  In this way, a honeycomb filter can be manufactured by drying and firing the honeycomb structure 70 in which both ends of the through hole 70a are sealed.

  According to the present invention, since the vibration by the vibrator 140 having the eccentric weight 147 is applied to the sealing material 130 on the elastic plate 20, the sealing material 130 can be spread throughout the recess 20d. . Thereby, the uniformity of the sealing length of the sealing part 70p can be improved.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation aspect is possible.

  For example, in the above-described embodiment, the elastic plate 20 is fixed to the main body 10 by the ring member 25 and the bolt 31, but the fixing method is not particularly limited. For example, the elastic plate 20 may be fixed to the upper surface 10a of the main body 10 by an adhesive. Further, the sealing device 100 may have a structure in which the elastic plate 20 can be easily replaced.

  In the above description, the communication path 10 e is formed by the main body 10 and the connection pipe 14, but the pump 50 may be directly connected to the main body 10 without the connection pipe 14.

  Moreover, in the said embodiment, although the piston pump provided with the cylinder 51, piston 53, and piston rod 54 is employ | adopted as the pump 50, if supply and discharge | emission of the fluid into the recessed part 10d are controllable. Others may be used. For example, a valve connected to a pressure source and capable of controlling supply of fluid from the pressure source, and a valve connected to a vacuum source such as a vacuum pump and capable of controlling discharge of fluid to the vacuum source may be used. .

Further, the shape of the recess 10d is not particularly limited, and can be appropriately set according to the honeycomb structure 70 to be sealed.
For example, the planar shape of the concave portion 10d viewed from above may be an ellipse, a rectangle, a square, or the like other than a circle. In this case, the size in the case of a rectangle or a square can be, for example, 50 to 300 mm on a side. Further, the side surface 10b does not need to be vertical and the bottom surface 10c is not parallel to the upper surface 10a of the main body 10, and may be, for example, an inclined surface or a curved surface. Moreover, you may have an unevenness | corrugation on the bottom face 10c.

  Moreover, in the said embodiment, although the holding | maintenance part 80 is provided with the pneumatic cylinder 82, it is not restricted to this, For example, it can substitute for various mechanisms, such as a gear mechanism.

  The holding unit 80 is not always essential. For example, when supplying the sealing material, the weight is placed on the honeycomb structure 70 to fix the honeycomb structure to the main body 10, and when the honeycomb structure 70 is separated from the main body, the weight is removed. Then, the honeycomb structure may be movable. Further, when the honeycomb structure has a certain amount of weight, the honeycomb structure is fixed by its own weight, so that an embodiment without special fixing means is also possible.

  The configuration of the vibration exciter 140 is not particularly limited as long as the eccentric weight 147 is connected to the rotating shaft 142 of the motor 141. For example, in the above embodiment, the rotating shaft 142 is arranged in the vertical direction, but the present invention can be implemented even if the rotating shaft is arranged in the horizontal direction or obliquely with respect to the vertical direction and the horizontal direction. A plurality of vibrators 140 may be arranged with respect to the main body unit 10. For example, when the rotation shaft 142 is disposed horizontally, the two rotation shafts 142 may be disposed orthogonally. In addition, the fixing method to the main body 10 is not particularly limited. In the above embodiment, the rotating shaft 142 is fixed to the main body 10 using the bearing 146 provided separately from the motor 141. In the case where the length of the shaft 142 is short, the present invention can be carried out without the bearing 146.

  The shape and structure of the honeycomb structure 70 are not limited to the above. For example, the outer shape of the honeycomb structure 70 may not be a cylinder, and may be a prism such as a quadrangular prism. Further, the cross-sectional shape of the through hole 70a of the honeycomb structure 70 may not be a square, and may be, for example, a rectangle, a triangle, a polygon, a circle, or the like. Furthermore, the arrangement of the through holes 70a may not be a square arrangement, for example, a triangular arrangement, a staggered arrangement, or the like.

  Moreover, in the said embodiment, although the plate-shaped mask 170 which has many through-holes is employ | adopted, the place shielded with a mask is arbitrary. Further, the present invention can be implemented without using such a mask 170. For example, the plug may be plugged with a material that decomposes when heated in some of the through holes 70a of the honeycomb structure 70 before the sealing process, and the plug may be pyrolyzed after the sealing. In the present invention, even when a mask is not used, the honeycomb structure 70 can be easily separated from the main body 10 and the elastic plate 20 by the elastic plate 20 that deforms into a convex shape after the sealing process. .

Moreover, in the said embodiment, although the bottom face 10c of the main-body part 10 is horizontal and the opening of the recessed part 10d is orient | assigned upwards, it is not restricted to this, For example, the bottom face 10c inclines with respect to a horizontal surface, and the recessed part 10d The opening may be directed obliquely upward, or the bottom surface 10c may be a vertical surface and the opening of the recess 10d may be directed in the horizontal direction. The sealing device having the bottom surface 10c as an inclined surface or a vertical surface in this manner is particularly suitable when a sealing material having a high viscosity, for example, about 10 to 50 Pa · s is used, and is accompanied by the rotation of the eccentric weight. In addition to force, the effect of spreading the sealing material paste into the recess 10d can also be provided by gravity.
Even in such a case, the rotation shaft 142 may be perpendicular to the bottom surface 10c, may be inclined, or may be arranged in parallel with the bottom surface. Further, when the rotation axis is parallel to the bottom surface, the two rotation axes may be arranged so as to be orthogonal to each other.

  DESCRIPTION OF SYMBOLS 10 ... Main-body part, 10e ... Communication path, 20 ... Elastic board, 30 ... Recessed part, 50 ... Pump, 70 ... Honeycomb structure, 80 ... Holding part, 100 ... Sealing device, 140 ... Exciter, 142 ... Rotating shaft, 147 ... eccentric weight, 170 ... mask.

Claims (3)

A main body having a recess and a communication passage opening in the inner surface of the recess;
An elastic plate provided in the main body so as to cover the recess,
A vibrator fixed to the main body,
The vibration exciter is a sealing device having a motor having a rotating shaft and an eccentric weight connected to the rotating shaft.   The sealing device according to claim 1, wherein the elastic plate is a rubber plate. A step of preparing an elastic plate disposed so as to cover the concave portion with respect to the main body portion having a concave portion and a communication path that opens to the inner surface of the concave portion;
Forming a recess in the elastic plate by discharging the fluid in the recess through the communication path;
Supplying a sealing material into the recess of the elastic plate;
Applying vibration to the sealing material in the recess of the elastic plate;
Disposing one end face of the honeycomb structure having a plurality of through holes at a position facing the concave portion;
A step of moving the elastic plate toward one end surface of the honeycomb structure by supplying a fluid between the main body portion and the elastic plate via the communication path after the step of applying the vibration; ,
With
The method for producing a honeycomb structure having a plurality of through holes whose ends are sealed, wherein the vibration is applied to the sealing material by rotating a rotating shaft to which an eccentric weight is connected.

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