JP6268084B2 - Method for manufacturing honeycomb carrier - Google Patents

Description

The present invention, on the outer periphery of the honeycomb substrate, a method for manufacturing a honeycomb responsible body comprising an annular protrusion is provided over its entire circumference.

  When the exhaust gas purification apparatus is configured by housing the honeycomb carrier in the casing, in order to determine the axial position of the honeycomb carrier in the casing, an annular protrusion is provided on the outer circumference of the honeycomb substrate. Patent Document 1 discloses a structure in which a honeycomb carrier is configured and the annular protrusion is engaged with an annular recess formed on the inner surface of a casing with a retaining agent interposed therebetween.

JP 2013-144554 A

  In what is disclosed in Patent Document 1 described above, the outer periphery of the honeycomb base material formed to have a larger diameter than the required outer diameter is subjected to cutting, and an annular protrusion is formed on the outer periphery of the honeycomb base material having the required outer diameter. A honeycomb carrier provided with a portion is obtained, but with such cutting, there is a limit to the height of the annular protrusion due to the yield. In addition, in order to increase the shape accuracy of the honeycomb carrier after cutting, it is necessary to increase the cutting accuracy, and in order to prevent the honeycomb base material from being cracked during the cutting process, the time is taken with careful time. It is necessary to increase the cost.

The present invention, such a situation in view of the in has been made, honeycomb responsible body and readily formable annular projection of the annular projection provided on the outer periphery of the honeycomb substrate height adjustment while freely adjustable It is an object of the present invention to provide a method for manufacturing a honeycomb carrier capable of efficiently manufacturing the above.

To achieve the above object, the present invention is, on the outer periphery of the honeycomb substrate, over the entire circumference, in the method for manufacturing a honeycomb carrier which annular projection which projects is provided annularly, including clayey heat resistance of the fabric A winding step of winding a band-shaped material impregnated with a viscous liquid around the outer periphery of the honeycomb base material; a molding step of pressing and molding the band-shaped material wound around the outer periphery of the honeycomb base material; A first feature is that a drying step of drying so as to remove moisture from the material is performed in this order.

The present invention, in addition to the first feature, the before running the winding step, the outer periphery to the second feature to perform the adhesive application step of applying an adhesive of the honeycomb substrate And

  According to the first aspect of the present invention, a band-shaped material formed by impregnating a heat-resistant cloth with a viscous liquid containing clay is disposed on the outer periphery of a honeycomb base material and dried to thereby form an annular protrusion on the honeycomb. Since it is formed on the outer periphery of the substrate, the height of the annular protrusion is limited in what cuts the outer periphery of the honeycomb substrate, whereas the annular protrusion is increased by increasing the number of windings of the strip-shaped material Thus, the height of the annular protrusion can be freely adjusted, and the strength of the honeycomb carrier can be increased. In addition, after the drying process, the texture of the fabric will remain on the surface of the annular protrusion, and it will have an appropriate surface roughness, so the axial holding force can be increased by increasing the frictional force when housed in the casing. Can be increased.

Further, a winding step for winding the strip-shaped material on the outer periphery of the honeycomb substrate, that the a molding step of molding compacted the strip material, to perform a drying step of removing moisture, the heavy from the strip material Thus, the honeycomb carrier can be efficiently manufactured while improving the yield by eliminating the cutting process.

Furthermore, according to the second feature of the present invention, since the adhesive is applied to the outer periphery of the honeycomb base material before the winding step, the band-like material is firmly fixed to the outer periphery of the honeycomb base material, so that the axial load is increased. On the other hand, a strong honeycomb carrier can be efficiently manufactured.

It is a longitudinal cross-sectional view of the exhaust gas purification apparatus of 1st Embodiment. FIG. 2 is a sectional view taken along line 2-2 of FIG. It is sectional drawing of a strip | belt-shaped material. It is a figure which shows a part of manufacturing process of a honeycomb support sequentially. It is a longitudinal cross-sectional view of the exhaust emission control device of 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  The first embodiment of the present invention will be described with reference to FIGS. 1 to 3. First, in FIGS. 1 and 2, this exhaust purification device 11 </ b> A is used for a part of an exhaust system of a gasoline engine. In the casing 12A, in order from the upstream side along the exhaust flow direction 13, a catalyst carrier 14 for removing harmful components such as CO, HC and NOx in the exhaust, and exhaust particulates contained in the exhaust are captured. A honeycomb carrier 15A for collection is accommodated and fixed.

  Referring also to FIG. 2, the casing 12 </ b> A has a pair of case halves 16, 17 having a semicircular cross-sectional shape provided integrally at both ends in the circumferential direction of the case halves 16, 17. The flanges 16a and 17a are joined to each other to form a cylindrical shape. Further, an upstream connecting pipe having a tapered cylindrical portion 18a having a diameter increasing toward the downstream side along the exhaust flow direction 13 and having a flange 19 fixed to one end portion by welding or the like at one end portion of the casing 12A. 18 is fixed by welding or the like, and the other end of the casing 12A is welded to one end of the downstream connecting pipe 20 having a tapered cylindrical portion 20a having a diameter that decreases toward the downstream side along the exhaust flow direction 13. The flange 21 is fixed to the other end portion of the downstream connection pipe 20 by welding or the like.

  The casing 12A is formed with an upstream large diameter portion 22 corresponding to the catalyst carrier 14 and a downstream large diameter portion 23A corresponding to the honeycomb carrier 15A.

  The catalyst carrier 14 is accommodated in the casing 12A with a first mat 24 having heat resistance interposed between the inner surface of the upstream large diameter portion 22, and the honeycomb carrier 15A has a heat resistant first mat 24. Two mats 25 are placed between the inner surface of the downstream large-diameter portion 23A and accommodated in the casing 12A.

  The honeycomb carrier 15A is configured according to the present invention and has a cylindrical outer peripheral surface made of ceramics such as silicon carbide while having a partition wall 27 of a porous chamber that partitions and forms a plurality of cells 26 serving as exhaust passages. An annular protrusion 29A is provided on the outer periphery of the honeycomb substrate 28 formed as described above over the entire periphery.

  The annular protrusion 29A is for restricting the axial movement of the honeycomb carrier 15A in the casing 12A, and the annular protrusion is provided on the inner periphery of the downstream large diameter portion in the casing 12A. An annular recess 30A corresponding to 29A is formed.

  In manufacturing the honeycomb carrier 15A, as shown in FIG. 3 (a), a winding step of winding a strip 31 around the outer periphery of the honeycomb base material 28, and the honeycomb as shown in FIG. 3 (b). A forming step of forming the band-shaped material 31 wound around the outer periphery of the base material 28 together with the honeycomb base material 28 by pressing with a press machine 34, and removing moisture from the band-shaped material 31 as shown in FIG. Thus, the drying process of drying in the furnace 35 is executed in this order. In addition, you may make it perform a drying process with the said press machine 34 using the press machine 34 provided with the heater.

  Referring to FIG. 4 as well, the strip 31 is formed by impregnating a heat-resistant cloth 32 with a viscous liquid 33 containing clay. The cloth 32 is made of a woven fabric or a non-woven fabric made of heat-resistant inorganic fibers. For example, continuous glass fibers, silica fibers, basalt fibers, polycrystalline fibers, heat-treated refractory ceramic fibers and the like are preferably used. it can. The viscous liquid 33 is typically a slurry containing water, an inorganic binder, and inorganic filler particles as disclosed in PCT International Application Publication No. WO2013 / 044012 (A1). It is desirable to include a component.

  In winding the band-shaped material 31 around the honeycomb base material 28, it is desirable that at least a part of the band-shaped material 31 is wound around the outer periphery of the honeycomb base material 28. An adhesive may be interposed between the honeycomb substrate 28 and the outer periphery of the honeycomb substrate 28, and this adhesive may be applied to the honeycomb substrate 28 in the adhesive application 32 step before the winding step is performed. What is necessary is just to make it apply | coat an adhesive agent to outer periphery.

  Next, the operation of the first embodiment will be described. The honeycomb carrier 15A is configured such that an annular protrusion 29A is provided on the outer periphery of the honeycomb substrate 28, and the annular protrusion 29A is provided over the entire periphery. The belt-like material 31 formed by impregnating the heat-resistant cloth 32 with the viscous liquid 33 containing clay is dried in a state where the belt-like material 31 is arranged on the outer periphery of the honeycomb base material 28 so as to protrude annularly from the outer periphery. The structure of the honeycomb carrier by cutting the outer periphery of the honeycomb base material has a limit in the height of the annular protrusion, whereas the annular protrusion is increased by increasing the number of windings of the strip 31. 29A can be increased, the height of the annular protrusion 29A can be freely adjusted, and the strength of the honeycomb carrier 15A can be increased. At this time, when the viscous liquid 33 contains the constituent component of the honeycomb base material 28, the annular protrusion 29A is familiar to the honeycomb base material 28 and is more robust against the load in the axial direction. An annular protrusion 29A can be configured.

  In addition, after the drying treatment, a rough feeling of the fabric remains on the surface of the annular protrusion 29A, and has an appropriate surface roughness. Therefore, the frictional force when accommodated in the casing 12A is increased to increase the axial direction. Holding power can be increased.

  Further, since the band-shaped material 31 is wound so that at least a part of the outer periphery of the honeycomb substrate 28 overlaps with the outer periphery of the honeycomb substrate 28, the honeycomb carrier 15A that is strong against the axial load acting on the honeycomb carrier 15A can be obtained. In addition, since the adhesive is interposed between the outer periphery of the strip-shaped material 31 and the honeycomb base material 28, the honeycomb carrier 15A that is strong against the axial load can be obtained.

  Further, in the exhaust emission control device 11A using the honeycomb carrier 15A, a casing 12A having an accommodation recess 30A corresponding to the annular protrusion 29A on the inner periphery and a heat-resistant second mat 25 with the inner surface of the casing 12A. Since the honeycomb carrier 15A is accommodated in between, the casing 12A can firmly hold the honeycomb carrier 15A against the axial load acting on the honeycomb carrier 15A.

  In manufacturing the honeycomb carrier 15A, a winding step of winding a strip 31 formed by impregnating a heat-resistant cloth 32 with a viscous liquid 33 containing clay around the outer periphery of the honeycomb substrate 28; Since the forming process of pressing and molding the band-shaped material 31 wound around the outer periphery of the base material 28 and the drying process of drying so as to remove moisture from the band-shaped material 31 are performed in this order, the cutting process is performed. By making it unnecessary, the honeycomb carrier 15A can be efficiently manufactured while improving the yield.

  Further, an adhesive application step of applying an adhesive to the outer periphery of the honeycomb substrate 28 may be performed before the winding step is performed. It is possible to efficiently manufacture the honeycomb carrier 15 </ b> A that is firmly fixed to the axial load and is strong against the axial load.

  The second embodiment of the present invention will be described with reference to FIG. 5, but the parts corresponding to the first embodiment are only shown with the same reference numerals, and the detailed description is as follows. Omitted.

  The casing 12B of the exhaust purification device 11B is formed to have an upstream large diameter portion 22 corresponding to the catalyst carrier 14 and a downstream large diameter portion 23B corresponding to the honeycomb carrier 15B.

  A honeycomb carrier 15B, in which an annular protrusion 29B is provided on the outer periphery of the honeycomb base material 28, has a second mat 25 having heat resistance interposed between the inner surface of the downstream large-diameter portion 23B. In the casing 12B, an accommodation recess 30B corresponding to the annular protrusion 29B is formed on the inner periphery of the downstream large-diameter portion 23B in the casing 12B.

  The annular protrusion 29B winds a strip 31 (see the first embodiment) around the outer periphery of the honeycomb substrate 28, similarly to the annular protrusion 29A of the honeycomb carrier 15A of the first embodiment. A winding step, a forming step for pressing and molding the strip 31 wound around the outer periphery of the honeycomb substrate 28, and a drying step for drying the strip 31 to remove moisture are executed in this order. In the winding step, the strip 31 is wound so that a plurality of sheets overlap each other while the winding position is shifted in the axial direction of the honeycomb substrate 28 in the winding step. Thus, the annular protrusion 29B is formed long in the axial direction of the honeycomb substrate 28 while having a trapezoidal cross-sectional shape. Corresponding to such an annular protrusion 29B, the housing recess 30B of the casing 12B is also formed long in the axial direction.

  According to the second embodiment, the same effects as those of the first embodiment can be obtained, and the load exerted on the cells 26 of the honeycomb substrate 28 can be made closer to each other in the axial direction. .

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

11A, 11B ... exhaust purification devices 12A, 12B ... casings 15A, 15B ... honeycomb carrier 25 ... mat 28 ... honeycomb base materials 29A, 29B ... annular projections 30A, 30B ... · Containing recess 31 ··· strip material 32 ··· cloth 33 ··· viscous liquid

Claims (2)

In the manufacturing method of the honeycomb carrier (15A, 15B) in which the outer periphery of the honeycomb base material (28) is provided with the annular protrusions (29A, 29B) projecting annularly over the entire periphery,
A winding step of winding a belt-like material (31) formed by impregnating a heat-resistant cloth (32) with a viscous liquid (33) containing clay around the outer periphery of the honeycomb substrate (28); (28) The molding step of pressing and compacting the belt-like material (31) wound around the outer periphery and the drying step of drying so as to remove moisture from the belt-like material (31) are executed in this order. A method for manufacturing a honeycomb carrier. Before performing the winding process, the method for manufacturing a honeycomb carrier according to claim 1, characterized in that to perform the adhesive application step of applying an adhesive to the outer periphery of the honeycomb substrate (28).

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