JPS5918181A - Manufacture of honey comb form structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Innumerable tubular passages connected in a nest-like manner through thin partition walls are closed every other vertical and horizontal direction on one end surface, and other tubular passages are opened adjacent to the closed tubular passages. A filter that purifies exhaust gas by adsorbing fine carbon in exhaust gas emitted from various parts, especially diesel engines of automobiles, in which a honeycomb-shaped structure made of a porous sintered body of inorganic raw material with closed end faces is adsorbed. However, it has the drawback that it requires a large amount of man-hours to create the strips that close every other vertical and horizontal end face of the numerous tubular passages connected to the honeycomb through thin partition walls.

The present invention has succeeded in increasing the mass productivity of the honeycomb structure, and will be explained below with reference to the drawings.

FIG. 1 shows a honeycomb-shaped molded body formed from the inorganic raw material used as the base material in the present invention, in which numerous tubular passages constituting the eastern part of the bee are closed every other vertical and horizontal direction on one end surface, and / in the figure is made of metal. , inorganic raw materials such as gold R oxides, metal carbides, and nitrides, preferably oxides such as cordierite and alumina, carbides and nitrides such as silicon carbide and silicon nitride, and clay or organic caking. The eastern part of the bee has countless tubular passages //, //...l/ made by adding a chemical agent and using a conventional method, and on one end surface /a, every other vertical and horizontal tubular passage //a.

iia...iia is blocked by inorganic raw material λ9.2
...It's been done.

Figure 1 shows the honeycomb-shaped molded body/other end face/
In b, the tubular passageway is closed by an inorganic raw material at one end surface by λ1.2... / / a * /
The tubular passage //b, //b...//b which opens at the one end surface adjacent to /a...iia is closed by the inorganic raw material 3°3...3 at the other end surface /b side. , shows a fired honeycomb structure, which is formed by blowing compressed air onto the entire one end surface after the other end surface/b of the honeycomb shaped body shown in FIG. Among the organic thin films covering the entire other end surface, a tubular passage opening every other vertical and horizontal direction on one end surface /a, //b;
/lb...//l) After opening the thin film, the other end surface /b is immersed in the slurry of the inorganic raw material, and the organic thin film is opened by compressed air. //b, //b...//l) and then dry,
Numerous tubular passages that are fired to become porous and open every other time on one end face are closed on the other end face, and are opened on one end face as shown in FIG. 3. //l)...//l) The exhaust gas 2 flowing from
... - Tubular passages blocked by thick-walled ends, closed at one end face adjacent to these tubular passages, 2... closed, and open at the other end / / a + /
/a...iia, a honeycomb structure is obtained which is purified and discharged by the partition wall ≠, the partition wall between them, which serves as a filtration wall. - Note that the cross-sectional area of the tubular passage is extremely small for the above-mentioned organic thin film, for example, in the case of a square, it is about between /, I Synthetic resins such as vinyl are preferred; in either case, the other end surface of the honeycomb-shaped molded body is dipped in a slurry with a solvent;
After the entire tubular passage on the other end of the two-cam shaped molded body is covered by capillarity and surface tension, compressed air is blown from the entire one end while it is not drying, causing blockage at the one end. Tubular passages that open adjacent to every other vertical and horizontal tubular passage can be easily opened by tearing the organic thin film covering the other end surface.

The slurry of the inorganic raw material that closes the tubular passage with the organic thin film opened on the other end face is preferably a slurry of raw material powder of the same quality as the honeycomb-shaped molded body of the base in order to match the firing shrinkage rate, etc. The entire other end surface of the honeycomb-shaped molded body is immersed in the slurry, and when it is dried, the organic thin film is broken by compressed air and the opened tubular passages are closed, and in the next firing, the other end surface is immersed in the slurry of the inorganic raw material. The remaining organic thin film covering the closed tubular passage and the adjacent tubular passage can be burnt off to obtain the honeycomb structure shown in FIG. 1, but when the other end is immersed in mud, To prevent sludge from adhering to the remaining organic thin film covering every other vertical and horizontal tubular passage,
It is preferable to apply a water repellent to the organic thin film before blowing compressed air from one end. If slime droplets remain even after applying the water repellent, lightly wipe with a damp sponge, cloth, etc. It is best to apply it and absorb it.

Next, as a means of forming a /S nicomb-like shape in which countless tubular passages are closed every other length and width on one end surface serving as a base, the partition walls between each tubular passage are made to have a desired thickness, such as a diesel engine. 0.0 when the purpose is to purify exhaust gas.
0 g to 0.1 rrvn, and one end surface of the fruit tube formed by a conventional method such as extrusion or casting is preferably immersed in a slurry of an inorganic raw material of the same quality as the fruit tube of the peak, and the entire end surface or from the end surface is completely removed. After closing the tubular passage so as to form a bottom surface within the thickness of the partition wall, compressed air is blown into every other vertical and horizontal tubular passage from the other end face to open the closed part formed on one end face, or as described above. At one end surface of a bee tube formed by the conventional method, every other vertical and horizontal tubular passage is pressed by a presser with a tapered portion at the tip, and the central part of each partition wall surrounding the tubular passage is pressed against the adjacent tubular passage. The tubular passage surrounded by the deformed partition walls is closed off at one end, or the -d♀ body is covered with an organic thin film, and then Various methods are used, such as applying the same method as described above to the other end surface, in which the tubular passages of the spacer are sequentially or simultaneously opened using compressed air, and then immersed in a slurry of inorganic raw material to close the openings. Can be adopted.

Example / A clay obtained by mixing and kneading a cordierite powder with an average particle size of 30% by weight with a raw material powder of cordierite porcelain composition and a water-melting polyurethane resin was prepared by a well-known method. A bee fruit tube in which tubular passages with a partition wall thickness of O12 and a cross-sectional size of 1/, I Add acetone to the clay! After immersing one end face in the obtained slurry to a depth of about 3 fi to block the whole, J Ky/cy? Compressed air of I was blown into the opening to produce the honeycomb-shaped molded body shown in FIG.

Next 2! About 2wn of the other end surface of the honeycomb-shaped molded body was placed in vinyl acetate, which was made into a slurry by adding water as a solvent.
Before the vinyl acetate hardens, apply compressed air to the entire end surface to remove every other vertical and horizontal portion of the end surface that is blocked by the cordierite slurry. The vinyl acetate coating layer at the end of the tubular passage that opens adjacent to the tubular passage is opened, and then the entire other end surface is immersed in cordilite slurry as before, and the vinyl acetate coating layer is removed by the compressed air. A honeycomb-type structural body is produced by closing every other vertical and horizontal tubular passage that is open, and after drying this, it is fired at θ℃ for 2 nights to close the pores.
A honeycomb structure of about jO% was obtained.

This honeycomb structure adsorbed approximately NJ of particulate carbon contained in the exhaust gas of a diesel engine.

In this example, water was added to form the organic film on the other end surface.
% vinyl acetate, but the present invention is not limited to this, and any liquid that has a slight viscosity and disappears upon firing can be used. For example, satisfactory results were obtained with water containing a little starch paste or with plain water containing nothing.

In addition, in order to close one end surface to the lips, it is possible to make only one extruded raw)-nicum structure at the same time, and to make one with one end surface closed to seven pieces, it is possible to achieve this purpose. By applying compressed air to one end surface of one comb in the same positional relationship as during extrusion, it is possible to easily close every seventh one end surface.

Example λ Front f? Form the bee bundle in the same manner as in J. Immediately press the open end of every other vertical A yellow tubular passage on one end surface with a square pyramid-shaped pusher, and make each partition wall surrounding these tubular passages adjacent to each other. A honeycomb structure in which the tubular passages are deformed in the direction of the central axis, joined and closed, and then the tubular passages opened every other R width on one end face are closed again on the other end face in the same way as in the previous example. was able to manufacture.

In both of the above embodiments, the cross-sectional shape of the tubular passage is square, but it may be rectangular or diamond-shaped, triangular or scalene triangular as shown in Figure i, or even oval with circular dimensions. However, μ-gonal or triangular shapes are preferred in order to make the thickness of the partition walls between the tubular passages uniform, and the applications are not limited to exhaust gas purification, but also filtration of fluids and solids, and even batteries that utilize honeycomb-shaped partition walls. It can also be used.

Bee fruit tubes made of inorganic raw materials are unavoidably distorted by extrusion, casting, etc., and are also subject to distortion during drying and firing. Previously, the work of closing each passage was done individually, but with the present invention, only one end face is machined in the same way as before, and the other end face is machined simultaneously on the entire end face, greatly improving mass productivity and manufacturing. Large size that reduces the price significantly

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a honeycomb-shaped molded body that is the basis of the present invention, and the cross-sectional shape of the tubular passage is square. P! Figure 3 is a perspective view of the honeycomb type 1N structure of the present invention, and Figure 3 is a longitudinal cross-sectional view taken along line E in Figure 2 showing the function of the honeycomb type structure, and Figure 3 shows the honeycomb type structure of the present invention. Figure A shows one end face, and Figure B shows the other end face. /...Bundle of bees, ii, //, ii...Tubular passage, //3+//a+//a...Every other tubular passage J1.2...Occluded part, / /b, //b
, //b...adjacent tubular passage, J, J,! ...
Blocked part Fig. 3 1CL Fig. 4 ■ b Procedural amendment (voluntary) June 1958 Patent Application No. 127371 of 1982 2, Title of invention Method for manufacturing honeycomb structure 3, Person making the amendment Case and Relationship Patent Applicant Address 14-18 Takatsuji-cho, Mizuho-ku, Nagoya Name (
454) NGK Spark Plug Co., Ltd. Representative: Shuji Ogawa 4, Agent Address: Postal Code: 467 Name: 4-3-3-5.7, Takada-cho, Mizuho-ku, Nagoya City
The scope of claims on page 1 of the specification for m-correct subject 1 is corrected as follows. (1) A honeycomb-shaped molded body is formed by closing innumerable tubular passages constituting a bee bundle molded from an inorganic raw material in every other vertical and horizontal direction on one end surface, and the entire other end surface of the honeycomb-shaped molded body is is coated with an organic thin film, and then compressed air is blown over the entire one end surface to cover the other end surface of the organic thin film that covers the end of the tubular passage that opens adjacent to the closed tubular passage on one end surface. The organic thin film is opened, and then the entire other end surface is immersed in the slurry of the inorganic raw material, and the opened tubular passages are closed by the compressed air to form a honeycomb structure body, and the body is dried. A method for manufacturing a honeycomb-shaped structure, characterized in that the honeycomb-shaped structure is fired to become porous after the molding process. A method for manufacturing a honeycomb structure, which is formed by immersing the end face in a slurry of an inorganic raw material to close the entire surface, and then closing every other tubular passage with compressed air. (3) Claim 1. A honeycomb-shaped molded body made of the above-mentioned tJll-free raw material is deformed by deforming each partition of every other vertical and horizontal tubular passage on one end surface in the direction of the central axis of the adjacent tubular passage while the honeycomb has plasticity. A method for producing a honeycomb-shaped structure in which the adjacent tubular passages are closed. (4) A honeycomb-shaped molded body made of an inorganic material according to claim 1 is formed by covering one end surface of the eastern part of the bee with an organic material. After coating every other tubular passage with a thin film, compressed air is blown into every other tubular passage to open the organic thin film, and one end surface is then shallowly immersed in an inorganic raw material mud to form the opened tubular shape. 2. In the 4th line of page 9, ``indicated'' is corrected to ``corresponds to''. 402

Claims (1)

[Scope of Claims] (1) A two-cam shaped molded body is formed by closing every other vertical and horizontal one end face of countless tubular passages constituting a bundle of peaks molded from an inorganic raw material; After the entire other end surface of the honeycomb-shaped molded body is covered with an organic thin film, compressed air is blown onto the entire one end surface, so that one end surface of the organic thin film that covers the other end surface is adjacent to a closed tubular passage. Then, the organic thin film at the end of the tubular passage is opened, and then the entire other end surface is immersed in a slurry of inorganic raw material, and the opened tubular passage is closed by the compressed air, thereby forming the honeycomb structure body. 1. A method for manufacturing a honeycomb-type structure, which comprises forming a honeycomb structure, drying the element, and then firing the element to make it porous. (,2.Is it the inorganic raw material described in claim 7?
A honeycomb-shaped structure is formed by immersing one end surface of a bee tube into a slurry of an inorganic raw material to close the entire surface, and then opening every other tubular passage with compressed air. manufacturing method. (3) A honeycomb-shaped molded body made of the inorganic raw material according to claim 1 is produced while the bee tube has plasticity.
A method for manufacturing a honeycomb structure, which is formed by deforming each partition wall of every other tubular passage vertically and horizontally in the direction of the central axis of the adjacent tubular passage to close the adjacent tubular passage. (<') 4? A honeycomb-shaped molded body made of an inorganic material according to claim 1 is coated with an organic thin film over the entire end surface of the bee tube, and then compressed air is blown into every other tubular passage to remove the organic material. A method for manufacturing a honeycomb structure, which comprises opening a thin film, and then immersing the one end surface in a slurry of an inorganic raw material to close the opened tubular passages.