JP2001001332A - Method and apparatus for sealing ceramic molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for sealing a ceramic molding which can seal it properly by packing a uniform amount of sealing paste in each through hole without making the paste stick on the end face of a ceramic molding. SOLUTION: In a method for sealing a cylindrical ceramic molding 1 in which the end parts of the through holes of the molding 1 in which a lot of the through holes are formed longitudinal to be separated by partitions are sealed with a sealing paste 15 containing ceramic powder as a main component, after the paste 15 is packed in a sealable container in which an agitator is provided and a mask 11 in which an open hole is formed in the shape of a sealing pattern is installed on one side, the mask 11 is contacted with the end face of the molding 1, pressure is applied to the paste 5 while it is agitated, and the paste 15 is introduced from the open hole of the mask 11 into the through holes of the molding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sealing a columnar ceramic molded body in which a large number of through holes are juxtaposed in the longitudinal direction, and a sealing device for the ceramic molded body.

[0002]

2. Description of the Related Art Recently, it has become a problem that particulates contained in exhaust gas discharged from internal combustion engines such as vehicles such as buses and trucks and construction machines cause harm to the environment and human bodies. Various ceramic filters have been proposed which purify the exhaust gas by collecting the particulates in the exhaust gas by passing the exhaust gas through a porous ceramic.

In general, a ceramic filter 40 is formed by bundling a plurality of porous ceramic members 30 as shown in FIG. Further, as shown in FIG. 5, the porous ceramic member 30 has a large number of through holes 31 arranged in the longitudinal direction, and a partition wall 33 separating the through holes 31 functions as a filter.

[0004] That is, the through hole 31 formed in the porous ceramic member 30 is closed at one end on the inlet side or the outlet side of the exhaust gas by the filler 32, and the exhaust gas flowing into one through hole 31 is formed. The gas always passes through the partition wall 33 separating the through hole 31 and then flows out of the other through hole 31. When the exhaust gas passes through the partition wall 33, the particulates are trapped in the partition wall 33. The exhaust gas is purified.

Conventionally, such a porous ceramic member 3
In the production of No. 0, first, a ceramic powder, a binder, and a dispersion medium are mixed to prepare a mixed composition for producing a molded article, and then a large number of the mixed compositions are extruded. Is formed into a columnar ceramic molded body in which the through holes are juxtaposed in the longitudinal direction across the partition wall, and cut into predetermined lengths.

[0006] Next, the obtained ceramic molded body is dried and has a certain strength by scattering moisture.
The dried body of the ceramic molded body is easy to handle, and then the end of the through hole of the ceramic molded body is sealed with a sealing paste mainly composed of ceramic powder constituting the ceramic molded body. Then, the porous ceramic member 30 was manufactured by baking the ceramic molded body.

FIG. 6A is a sectional view schematically showing a conventional sealing device, and FIG. 6B is a partially enlarged sectional view showing a part thereof. Conventionally, in the sealing step, FIG.
As shown in the figure, a mask 21 having an opening 21a formed in a sealing pattern is provided on the side surface, an agitating piece 22 is provided therein, and an opening type filling the inside thereof with a sealing paste 15 is provided. The following sealing process was performed using the paste discharge tank 20 of (1).

When the ceramic molded body 1 moves to a portion where the paste discharge tank 20 is installed through a predetermined transportation path or the like, first, the mask 21 is moved by moving the paste discharge tank 20 so that the ceramic 21 is removed. End face 1 of molded body 1
a. At this time, the opening 21a and the portion of the through-hole 2 of the ceramic molded body 1 are in a positional relationship to directly face each other.

Subsequently, when the stirring piece 22 is moved up and down to stir the sealing paste 15, the sealing paste 15 flows, and the sealing paste 15 flows by the mask 2.
1 through the opening of the ceramic molded body 1
Paste 15 penetrates into the end of the sealing paste. When the filling of the sealing paste 15 has been completed in the above-described step, the paste discharging tank 20 is moved in the opposite direction to the beginning, and the mask 21 is separated from the end face of the ceramic molded body 1 to complete the sealing step.

However, the upper part of the paste discharge tank 20 is open, and the opening 21 is moved by moving the stirring piece 22 up and down so that the sealing paste 15 flows.
a, it is difficult to discharge a predetermined amount from each opening 21a of the mask 21, and the filling amount varies, and in some cases, the through-hole 2 is not completely sealed. There was a problem that a portion was generated.

Since the paste discharge tank 20 is open, the sealing paste 15 leaks from the opening 21 a of the mask 21 during the operation of filling the sealing paste 15 into the through-hole 2 of the ceramic molded body 1. When performing the next operation, the sealing paste 15 adheres to the end surface 1 a of the ceramic molded body 1 before discharging the sealing paste 15.

When the sealing paste adheres to the end face of the ceramic molded body 1 as described above, irregularities are formed on the end face of the fired porous ceramic member, and thus the following problems occur. That is, the porous ceramic member is
Thereafter, a plurality of the members are bundled and adhered, processed into the shape of the filter 40 shown in FIG.
2 is applied.

When the sealing material 42 is applied, a film is stuck on the end surface of the filter 40 so that the sealing material 42 does not adhere to the end surface. There is a problem that the sealing material 42 flows into the end face portion without adhering to the end face.

[0014]

DISCLOSURE OF THE INVENTION The present invention has been made to solve these problems, and a uniform amount of the paste for sealing can be obtained without adhering the sealing paste to the end face of the ceramic molded body. An object of the present invention is to provide a method for sealing a ceramic molded body that can appropriately perform a sealing treatment by filling a through hole, and a sealing device used for the sealing treatment of the ceramic molded body.

[0015]

According to the present invention, there is provided a method for sealing a ceramic molded body, comprising the steps of: forming an end of the through-hole of a columnar ceramic molded body in which a large number of through-holes are juxtaposed in a longitudinal direction across partition walls; A method for sealing a ceramic molded body, which is sealed with a sealing paste containing a ceramic powder as a main component, comprising a stirrer, and a mask having an opening formed in a sealing pattern in an airtight container provided on one side. After filling the sealing paste, the mask of the hermetic container is brought into contact with the end face of the ceramic molded body, pressure is applied to the sealing paste under stirring, and the sealing paste is removed from the opening of the mask. It is characterized in that it penetrates into the through hole of the ceramic molded body.

Further, in the ceramic molded body sealing device of the present invention, the end of the through-hole of the columnar ceramic molded body in which a large number of through-holes are juxtaposed in the longitudinal direction with a partition wall therebetween is mainly made of ceramic powder. A sealing device for sealing with a sealing paste as a component, which is configured to be movable in an arbitrary direction, and a mask having an opening formed in a sealing pattern is installed on one side and another. And a stirrer having stirring blades for stirring the inside of the paste discharge tank, and a rotary connected to the paste inlet of the paste discharge layer. And a displacement type single shaft eccentric screw pump.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the method and apparatus for sealing a ceramic molded body according to the present invention will be described below with reference to the drawings.

The method for sealing a ceramic molded body of the present invention comprises:
A plurality of through-holes are formed in a columnar ceramic molded body in which the ends of the through-holes are juxtaposed in the longitudinal direction with a partition wall therebetween by a sealing method of a ceramic molded body in which a sealing paste mainly containing ceramic powder is sealed. There is provided a stirrer, after filling the sealing paste into a hermetically sealed container provided with a mask having an opening formed in a sealing pattern on one side, and then closing the sealing container on the end face of the ceramic molded body. The method is characterized in that a mask is abutted and pressure is applied to the sealing paste under agitation so that the sealing paste penetrates through the opening of the mask into the through-hole of the ceramic molded body.

The ceramic molded body to be subjected to the sealing treatment in the method for sealing a ceramic molded body of the present invention (hereinafter referred to as the sealing method of the present invention) is obtained by molding a mixed composition containing ceramic powder, a binder and the like as main components. It is formed by this. When producing the ceramic molded body, first, these are mixed to prepare a mixed composition for producing a molded body, and then the molded composition is produced by extruding the mixed composition. Subsequently, heating is performed to disperse the solvent and the like in the molded body, thereby completing the production of the columnar ceramic molded body in which a large number of through holes are juxtaposed in the longitudinal direction across the partition wall.

The ceramic powder is not particularly restricted but includes, for example, silicon carbide, silicon nitride, aluminum nitride,
Non-oxide ceramic powders such as boron nitride, titanium nitride, titanium carbide; alumina, cordierite, mullite,
Examples include powders of oxide ceramics such as silica, zirconia, and titania. Among these, silicon carbide, silicon nitride, aluminum nitride, and the like having excellent heat resistance are preferable.

The particle size of these ceramic powders is not particularly limited either, but it is preferable that the shrinkage is small in the subsequent firing step, for example, 100 parts by weight of a powder having an average particle size of about 0.3 to 50 μm. What combined with 5 to 65 weight part of powder which has an average particle diameter of about 0.1-1.0 micrometer is preferable.

The binder is not particularly limited.
For example, methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, polyethylene glycol, phenol resin, epoxy resin and the like can be mentioned. Usually, the amount of the binder is preferably about 1 to 10 parts by weight based on 100 parts by weight of the ceramic powder. Examples of the dispersion medium liquid that imparts fluidity to the mixed composition include an organic solvent such as benzene; an alcohol such as methanol; and water.

In the sealing method of the present invention, an airtight container provided with a stirrer and provided with a mask having openings formed in a sealing pattern on one side is used. This airtight container is not particularly limited as long as the mask is provided on one side and provided with a stirrer, but a paste discharge tank used in a ceramic molded body sealing device of the present invention described below is used. Optimal.

It is preferable that the hermetic container is provided with a device for applying pressure to the sealing paste filled therein. The device for applying pressure is not particularly limited. For example, a device for injecting gas such as air, or reducing the volume inside a closed container (a member having a fixed shape enters the closed container) Apparatus for applying pressure by such means, a device for press-fitting the sealing paste using a pump or the like, among them, among these, a device for press-fitting the sealing paste using a pump or the like is preferable, among which, A uniaxial eccentric screw pump used in a sealing device for a ceramic molded body of the present invention described below is more preferable.

Next, after filling the sealing paste into the hermetic container, the hermetic container is placed on the end face of the ceramic molded body such that each opening of the mask faces the through hole of the ceramic molded body. Abut the mask.

The opening formed in the mask is preferably smaller than the cross section of the through hole of the ceramic molded body to be sealed. By making the opening portion of the mask a small shape, when the mask abuts against the end face of the ceramic molded body, even if the mask position is slightly shifted, the opening portion is not deviated from the range of the through hole. And the plugging paste can be appropriately filled in the through holes of the ceramic molded body.

The composition and the like of the sealing paste are not particularly limited, but those which are easy to be integrated with the ceramic molded body when fired are preferable, and the same components as the slurry used for producing the ceramic molded body are preferable. Or
Alternatively, those to which a dispersion medium is further added are preferable.

Next, a pressure is applied to the sealing paste with stirring to allow the sealing paste to enter the through-holes of the ceramic molded body from the opening of the mask. The stirring method using a stirrer is not particularly limited as long as it can be stirred so that the composition of the sealing paste filled in the hermetic container becomes uniform, but the sealing paste is cut from the opening of the mask. What can be stirred so that it does not leak is preferable.

In the sealing method of the present invention, the amount of the sealing paste to be discharged from the mask can be adjusted by controlling the magnitude of the applied pressure, so that a fixed amount of the sealing paste is supplied to each through hole. Filling can be performed, and unfilling or the like due to insufficient filling amount can be prevented.

Further, since the container is a closed type, the sealing paste hardly leaks from the mask, so that the sealing paste can be prevented from adhering to the end face of the ceramic molded body due to leakage of the sealing paste. Irregularities on the body end surface can be prevented.

Next, the sealing device for a ceramic molded body of the present invention will be described. The sealing device for a ceramic molded body according to the present invention is an apparatus for sealing an end portion of the through-hole of a columnar ceramic molded body in which a large number of through-holes are juxtaposed in the longitudinal direction with a partition wall therebetween. A sealing device for sealing with a paste, which is configured to be movable in any direction, a mask having openings formed in a sealing pattern is installed on one side, and paste is introduced on the other side. A closed paste discharge tank provided with a port, a stirrer provided with a stirring blade for stirring the inside of the paste discharge tank, and a uniaxial eccentric rotary volume type connected to a paste inlet of the paste discharge tank And a screw pump.

FIG. 1A is a cross-sectional view schematically showing a device for sealing a ceramic molded body of the present invention (hereinafter, referred to as a sealing device of the present invention), and FIG. It is the partial expanded sectional view shown typically. As shown in FIG. 1, the sealing device for a ceramic molded body of the present invention has a mask 11 installed on one side and a paste inlet 1
And a stirring blade 12 for stirring the inside of the paste discharge tank 10.
a, a stirrer 12 having a
a) and a rotary positive displacement uniaxial eccentric screw pump 13 connected thereto. Further, the paste discharge tank 10 is configured to be movable in an arbitrary direction.

FIG. 2A is a partially enlarged cross-sectional view showing a cross section perpendicular to the main surface of the mask when the mask comes into contact with the end surface of the ceramic molded body, and FIG. It is the elements on larger scale which showed the parallel cross section. Mask 11
The opening 11a is formed in a portion facing the through hole 2 which needs to be filled with the sealing paste 15 when the mask 11 comes into contact with the end face of the ceramic molded body 1 when the mask 11 comes into contact with the sealing pattern. I have.

For example, as shown in FIG. 2B, the area of the opening 11a of the mask 11 is desirably smaller than the cross-sectional area of one through hole 2 of the ceramic molding 1 opposed to the mask. It is preferable that the area of the opening 11a is formed to be 25 to 81% with respect to the cross-sectional area of the through hole 2.

As described above, by making the opening 11 a of the mask 11 smaller than the cross-sectional area of the through hole 2, the opening 1 a
The sealing paste 15 can be reliably filled into the through hole 2 even if the position of the through hole 2 slightly deviates from that of the through hole 2, thereby preventing the sealing paste 15 from adhering to the end surface 1 a of the ceramic formed body 1. be able to.

Further, in the present invention, since the sealing paste 15 is discharged from the opening 11a by applying pressure to the sealing paste 15, even if the area of the opening 11a is reduced, the sealing paste 15 is discharged. There is no problem in ejecting the liquid. Rather, since the sealing paste 15 is less likely to leak by making the opening 11a smaller, sealing can be performed more favorably.

FIGS. 3 (a) and 3 (b) are conceptual diagrams schematically showing the flow state of the sealing paste when the stirring blade provided in the stirrer of the sealing device of the present invention is operated. (C) is a conceptual diagram schematically showing a flow state of the sealing paste when a stirring blade different from that used in the present invention is operated. In the figure, the arrow indicates the direction in which the sealing paste flows by operating the stirring blade.

As shown in FIGS. 3A and 3B, two stirring blades 12a provided for each stirrer are provided.
The lowermost stirring blades 12b and 52b of the stirring blades 12b and the stirring blades 52a and 52b are configured to flow the sealing paste present therebelow from above as shown by arrows.

For example, when the stirrer 12 shown in FIG. 3A is used, as shown by the arrow in the drawing, the paste for sealing closes the stirring blade 12 near the stirring blades 12a and 12b.
a, 12b flows upward from below, and the stirring blades 12a,
After splitting right and left above 12b, it flows downward from above and forms a circulating flow.

When the stirrer 52 shown in FIG. 3B is used, as shown by the arrow in the drawing, the sealing paste is supplied to the stirring blades 52 near the stirring blades 52a and 52b.
a, 52b from above or below the stirring blades 52a, 52b
And flows toward the two blades 12a and 12b.
After passing through the vicinity, the stirring blades 12a and 12b collide with each other and divide right and left, and further flow upward or downward.

As described above, each of the stirring blades 12a, 1a
2b, even when the stirring blades 52a, 52b are used, the sealing paste existing below the lower stirring blades 12b, 52b flows upward from below, and therefore, due to the flow direction of the sealing paste. In addition, leakage or the like hardly occurs at the lower portion of the mask 11 shown in FIG.

On the other hand, when the stirrer 62 shown in FIG. 3 (c) is used, as shown by the arrow in the figure, the sealing paste transfers the stirring blades 62a, 62b from a position intermediate the stirring blades 62a, 62b. Then, it flows so as to move upward or downward, further flows right and left, and then flows in a direction opposite to the initial direction, and gathers at an intermediate portion between the stirring blades 62a and 62b. In this stirrer, the lower stirring blades 62b flow the sealing paste present near the stirring blades 62b so as to move from above to below, and as shown in FIG. Pressure is easily applied to the lower part of the mask 11, and leakage or the like is likely to occur from the opening 11 a of the mask 11.

In the sealing device of the present invention, the number of stirring blades provided in the stirrer is not particularly limited. However, the number of stirring blades may be below one stirring blade or below the lowest stirring blade of two or more stirring blades. The stirring blades are configured to flow the sealing paste to be moved upward from below, and pressure is less likely to be applied to the lower portion of the mask 11 even when the stirring blades move. Therefore, leakage or the like is less likely to occur below the mask 11 installed in the paste discharge tank.

Further, in the sealing device of the present invention, as shown in FIG. 1, a rotary displacement type uniaxial eccentric screw pump 13 is connected to a paste inlet 10a provided in the paste discharge tank 10.

The uniaxial eccentric screw pump 13 has a male screw rotor (made of metal) having a circular cross section mounted in a stator made of an elastic member having an elliptical cross section, and this rotor is connected via a drive shaft and a universal joint. When the rotor is rotated, the rotor moves up and down while rotating inside the stator, thereby sucking a liquid filled in a space formed between the two. It is configured to be able to transfer from the side to the discharge side.

This uniaxial eccentric screw pump does not require a valve because suction and discharge are simultaneously performed by the rotation of the rotor, and even if a highly viscous liquid such as a sealing paste used in the present invention is used, a fixed amount of liquid is used. Continuously inhaled,
Can be ejected. In FIG. 1, 13b
Is a paste suction port, and 13a is a motor for rotating a drive shaft (stator).

When the end of the through-hole of the ceramic molded body is sealed using the sealing device of the present invention, first, the sealing paste 15 filled in the paste discharge tank 11 has a uniform composition. , The stirrer 12 is operated and the stirring blade 12
Move a and 12b. The stirring blades 12a and 12b are continuously moved until this step is completed.

Next, after the ceramic molded body 1 is placed at a predetermined position, the paste discharge tank 10 is moved, and as shown in FIG.
1 is brought into contact with the end face 1 a of the ceramic molded body 1. Next, the uniaxial eccentric screw pump 13 is operated, and pressure is applied to the sealing paste 15 by press-fitting the sealing paste 15 into the paste discharge tank 10.
From the opening 11a of the mask 11 into the through hole 2 of the ceramic molded body 1.

Although not shown, the mask of the sealing device having the same structure is also brought into contact with the other end surface 1a of the ceramic molded body 1, and the through-hole at the other end of the ceramic molded body is subjected to the sealing treatment. Apply.

The sealing device of the present invention includes the paste discharge tank configured as described above, a stirrer equipped with stirring blades, and a uniaxial eccentric screw pump, so that the ceramic molded body is sealed by the above method. By this, without causing the paste for sealing to adhere to the end face of the ceramic molded body,
By filling a uniform amount of the paste for sealing into each through-hole, the sealing treatment can be appropriately performed.

The ceramic molding body sealing device of the present invention is provided with a control device having a built-in microcomputer. The control device receives a control signal from the control device, operates a stirrer, moves the ceramic molding and discharges paste. The movement of the tank, the operation of the uniaxial eccentric screw pump, and the like can be automatically performed.

[0052]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Example 1 70 parts by weight of α-type silicon carbide powder having an average particle diameter of 30 μm, 30 parts by weight of β-type silicon carbide powder having an average particle diameter of 0.28 μm,
5 parts by weight of methylcellulose, 4 parts by weight of a dispersant, and 20 parts by weight of water were blended and uniformly mixed to prepare a mixed composition of raw materials. This mixed composition was charged into an extruder, and a ceramic molded body was produced at an extrusion speed of 10 cm / min. This ceramic molded body has a size of 50 mm.
It was × 50 mm × 300 mm, the number of through holes was 324, and the length of one side of the through holes was 1.5 mm.

Next, using the paste discharging device shown in FIG. 1, the stirrer 12 is operated to flow the sealing paste 15 by the stirring blades 12a and 12b.
It was observed whether or not a phenomenon in which No. 5 leaked from below the mask (metal mask) 11 (hereinafter referred to as liquid dripping) was observed, but no liquid dripping was observed. The temperature of each part of the mask 11 was measured, and the difference between the highest temperature and the lowest temperature was uniform within 1.2 ° C.

Next, after the mask 11 is brought into contact with the end face 1 a of the ceramic molded body 1 using the paste discharging apparatus shown in FIG. 1, the sealing paste 15 is discharged using the uniaxial eccentric screw pump 13. The sealing paste 15 is discharged from the opening 11a of the mask 11 by press-fitting the sealing paste 15 into the ceramic molded body 1.
At the end of the through hole 2. After this step, mask 1
1 was separated from the end face 1a of the ceramic molded body 1 to complete the sealing process.

Then, the ceramic molded body after the sealing treatment was dried, and the dried paste for sealing was 0.5 m from the end face of the ceramic molded body with respect to the number of the through holes subjected to the sealing treatment.
The percentage of the protrusions of m or more (hereinafter, referred to as protrusion ratio) was measured. As a result, the protrusion ratio was 20%.

Thereafter, the ceramic molded body was cut and the length was measured so that the length of the filler in the sealing portion could be measured. As a result, the average length is 5.3 mm
Σ _n = 0.78, and the value of (σ _n / average length) was as small as 0.15. The length of one side of the opening (square) of the metal mask was 1.2 mm.

Comparative Example 1 A ceramic molded body was sealed in the same manner as in Example 1 except that the stirring blade of the stirrer shown in FIG. 3C was used. In addition, the same thing as Example 1 was used except that the thing of a lower position was fixed up and down at the same position as a stirring blade. When the liquid dripping of the mask was observed before sealing, liquid dripping was observed at the lower part of the mask. In addition, the temperature distribution of the sealing paste was inferior in uniformity as compared with the example in which the difference between the highest temperature and the lowest temperature was within 10 ° C. Further, the protrusion ratio was measured in the same manner as in Example 1, and was found to be 40%.

Further, when the length of the sealing portion was measured in the same manner as in Example 1, the average length was 2.4 mm, and σ _n
= 0.96, and the value of (σ _n / average length) is 0.4
It was one.

Comparative Example 2 Using the conventional paste discharge tank shown in FIG. 6, the sealing treatment of the ceramic molded body was performed by the method described in the background art.

First, when the liquid dripping of the mask was observed before sealing, a considerable amount of liquid dripping was observed at the lower portion of the mask. In addition, the temperature distribution of the sealing paste was inferior in uniformity as compared with the example, with the difference between the highest temperature and the lowest temperature being within 15 ° C. Further, the protrusion ratio was measured in the same manner as in Example 1, and was found to be 55%.

Further, when the length of the sealing portion was measured in the same manner as in Example 1, the average length was 2.6 mm, and σ _n
= 0.98, and the value of (σ _n / average length) is 0.3
A considerable variation of 7 was observed.

[0063]

As described above, the method for sealing a ceramic molded article of the present invention is as described above. Therefore, a uniform amount of the paste for sealing is applied to each through-hole without adhering the paste for sealing to the end face of the ceramic molded article. By filling, the sealing treatment can be appropriately performed.

The sealing device for a ceramic molded body according to the present invention is as described above. Therefore, by using this sealing device, a uniform amount of the sealing paste can be applied without adhering the sealing paste to the end face of the ceramic molded body. By filling each of the through-holes with the sealing paste, the sealing process can be appropriately performed.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view schematically showing a sealing device for a ceramic molded body of the present invention, and FIG. 1B is a partially enlarged cross-sectional view showing a part of the sealing device.

FIG. 2A is a partially enlarged cross-sectional view showing a cross section perpendicular to the mask main surface when the mask abuts on an end surface of the ceramic molded body in the ceramic molded body sealing device of the present invention; (B) is a partial enlarged sectional view showing a section parallel to the mask main surface.

3 (a) to 3 (c) are conceptual diagrams showing the flow state of the sealing paste when stirring the sealing paste using stirring blades.

FIG. 4 is a perspective view schematically showing a ceramic filter.

5A is a perspective view schematically showing a porous ceramic member, and FIG. 5B is a cross-sectional view taken along line AA in FIG.

FIG. 6A is a cross-sectional view schematically illustrating a conventional sealing device for a ceramic molded body, and FIG. 6B is a partially enlarged cross-sectional view illustrating a part of the sealing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ceramic molded body 1a End surface 2 Through hole 3 Partition wall 10 Paste discharge tank 10a Paste inlet 11 Mask 11a Opening part 12 Stirrer 12a, 12b Stirring blade 13 Uniaxial eccentric screw pump 15 Sealing paste 30 Porous ceramic member 31 Through hole 32 Filling Material 33 Partition wall 40 Ceramic filter

Claims (5)

[Claims] 1. A ceramic molding method for sealing an end of a through-hole of a columnar ceramic molded body in which a large number of through-holes are juxtaposed in a longitudinal direction with a partition wall therebetween, with a sealing paste containing a ceramic powder as a main component. A method for sealing a body, comprising a stirrer, after filling the sealing paste into a hermetically sealed container in which a mask having openings formed in a sealing pattern is installed on one side, and then on the end face of the ceramic molded body. The mask of the airtight container is brought into contact with the paste for sealing, and pressure is applied to the paste for sealing under agitation so that the paste for sealing enters the through-hole of the ceramic molded body from the opening of the mask. A method for sealing a ceramic molded body. 2. A pressure is applied by press-fitting the sealing paste into the hermetic container using the uniaxial eccentric screw pump connected to the hermetic container and rotating the positive displacement eccentric screw pump connected to the hermetic container. The method for sealing a ceramic molded body according to claim 1, wherein the ceramic molded body is penetrated into the through hole of the ceramic molded body from the opening of the mask. 3. An end portion of the through-hole of a columnar ceramic molded body having a large number of through-holes arranged in parallel in a longitudinal direction with a partition wall therebetween for sealing with a sealing paste containing a ceramic powder as a main component. A sealing device that is configured to be movable in an arbitrary direction, a mask having openings formed in a sealing pattern is installed on one side, and a paste introduction port is provided on the other side. Paste discharge tank, a stirrer provided with one or more stirring blades for stirring the inside of the paste discharge tank, and a rotating volume uniaxial connected to the paste inlet of the paste discharge tank A sealing device for a ceramic molded body, comprising an eccentric screw pump. 4. One or more stirring blades provided in the stirrer are provided below the one stirring blade or at least two stirring blades.
4. The sealing device for a ceramic molded body according to claim 3, wherein the sealing paste present below the lowermost stirring blade of the at least one stirring blade is caused to flow upward from below. 5. The mask, wherein the area of one opening is 25 to 8 with respect to the cross-sectional area of one through hole of the ceramic molded body.
The sealing device for a ceramic molded body according to claim 3 or 4, wherein the sealing device is configured to be 1%.