JP6503920B2 - Ventilation drying device, and method for producing binder-containing inorganic fiber molding using the same - Google Patents

Description

  The present invention relates to a through-drying apparatus used for through-drying of a binder-containing inorganic fiber molding, and a method of producing a binder-containing inorganic fiber molding using the same.

  Inorganic fiber moldings represented by ceramic fibers have been used for applications exposed to high temperature conditions such as industrial heat insulating materials, refractory materials, packing materials, etc., but in recent years cushions for automobile exhaust gas purification devices Material (holding material), that is, when an exhaust gas treating body such as a catalyst carrier or a particle filter is accommodated in a metal casing, it is wound around the exhaust gas treating body and interposed between the exhaust gas treating body and the casing It is also used as a holding material for exhaust gas purification devices.

It is generally carried out that the inorganic fiber molded body contains an organic binder and an inorganic binder in order to prevent fiber scattering during the assembling operation. The inorganic fiber molding containing a binder is referred to as a binder-containing inorganic fiber molding.
In the production of the binder-containing inorganic fiber molded body, after the mat of the inorganic fiber molded body is impregnated with the binder liquid and then dried, the solvent, the dispersion medium, etc. of the binder liquid is transferred to the surface and the binder is also transferred to the surface After drying, it is known that so-called migration occurs in which the binder is localized on the surface of the inorganic fiber molding.
For this reason, when drying the inorganic fiber molding, it is necessary to uniformly dry the entire width. Above all, in the through-flow drying method in which hot air is passed in the thickness direction of the inorganic fiber molded body for drying to dry, the solvent, the dispersion medium, etc. of the binder solution move in the thickness direction with the hot air, thereby suppressing migration. It is preferable in that the binder can be contained in the inside of the inorganic fiber molding.
Patent Document 1 discloses a method for producing a resin-impregnated inorganic fiber mat, in which an inorganic fiber mat is impregnated with a resin solution, and then the inorganic fiber mat is passed through by hot air in the thickness direction and dried.

JP 2001-316965 A

  In the through-flow drying apparatus, the inorganic fiber molded body impregnated with the binder is disposed on a support plate having a vent and dried, but the above-mentioned results are obtained depending on the width (width) and thickness of the inorganic fiber molded body. An area (exposed area) where the surface of the support plate is exposed is generated. Since the air flow resistance in the exposed area is lower than the air flow resistance in the inorganic fiber molded body, the hot air to be passed through the inorganic fiber molded body leaks to the exposed area. Since the flow rate per unit time of the hot air passing through the inside of the inorganic fiber molding decreases as the hot air leaks more, the drying efficiency by the ventilation decreases, and the inorganic fiber molding can not be dried in a short time There is a problem of

Such a problem becomes remarkable especially when producing a binder-containing inorganic fiber molding on a line. In the production line of the binder-containing inorganic fiber molded product, the application and impregnation of the binder solution to the inorganic fiber molded product and the drying in the through-flow drying apparatus transport the inorganic fiber molded product on a conveyer having air holes. It is done continuously while. In the above case, normally, inorganic fiber moldings having different widths and thicknesses are continuously produced.
When drying on a conveyer while conveying the inorganic fiber molded article, the width of the inorganic fiber molded article is usually smaller than the width of the conveyer in order to dry the inorganic fiber form uniformly and sufficiently in the width direction Designed. For this reason, an exposure area will necessarily exist on the said conveyance conveyor, and the leak of the hot air in the said exposure area will generate | occur | produce.
In addition, when manufacturing inorganic fiber moldings different in width and thickness continuously in the same line, the width of the conveyer is constant, so the exposure of the surface of the conveyer according to the width of the inorganic fiber moldings conveyed The size of the area changes, and the leak amount of the hot air also changes accordingly. For this reason, a change occurs in the flow rate per unit time of the hot air passing through the inorganic fiber molded body, and a drying defect occurs in the obtained inorganic fiber molded body.

  The present invention has been made in view of the above problems, and it is possible to prevent the leak of hot air when air-drying an inorganic fiber molded body, and to be able to dry the inorganic fiber molded body with high drying efficiency. An object of the present invention is to provide an apparatus and a method for producing a binder-containing inorganic fiber molded product using the apparatus.

  In order to solve the above-mentioned subject, the present invention has a number of vents, supports the inorganic fiber compact, and passes hot air in the thickness direction of the inorganic fiber compact through the vents. A through-flow drying device having a through-flow drying means for holding the side surface of the inorganic fiber molding, and the holding means capable of expanding and contracting in a direction perpendicular to the side surface of the inorganic fiber molding A support plate, a cover plate connected to the tip of the support column, having an inorganic fiber molded body-side flat surface, and a plate-like lid disposed on the support column side of the cover plate in contact with the lower end side of the cover plate. And the support column biases the cover plate and the cover in a direction perpendicular to the side surface of the inorganic fiber molding, thereby forming the inorganic fiber of the cover plate. The body-side flat surface is in contact with the side surface of the inorganic fiber molded body, and Kifuta unit provides a throughdrying apparatus characterized by closing the vent hole of the support means located on said support column side with respect to the caul plate.

  According to the present invention, the backing plate is urged to contact the side surface of the inorganic fiber molding according to the width and thickness of the inorganic fiber molding by the columns, so the inorganic fiber molding and the backing plate And prevent the occurrence of exposed areas of the support means. At the same time, the lid portion is also biased by the support column, so that the cover portion can close the exposed area of the support means positioned closer to the support column than the backing plate. As described above, since the exposed region of the support means is sealed by the movable jig, leakage of hot air from the exposed region can be prevented, and a through-flow drying device with high drying efficiency can be obtained.

  In the above-mentioned invention, it is preferable that the above-mentioned support means doubles as a conveyance means which conveys the above-mentioned inorganic fiber molded object, and a plurality of the above-mentioned clamping means are arranged along the conveyance direction of the above-mentioned inorganic fiber molded object. When carrying out through-flow drying while conveying the inorganic fiber molding on the production line, especially when carrying and passing through and drying while continuously changing the width of the inorganic fiber molding on the production line, the width of the inorganic fiber molding Accordingly, sealing of the exposed area of the support means by the movable jig can be efficiently performed.

  In the above invention, the support column is a fixed shaft connected to the contact plate, and an elastic part is connected to the fixed shaft and biases the contact plate and the lid through the fixed shaft. It is preferable to have the fixed frame which fixes the urging | biasing direction of the said elastic part. This is because when the degree of freedom in the direction of movement of the elastic portion is large, the backing plate and the lid can be biased in an appropriate direction.

  In the above-mentioned invention, it is preferred that the above-mentioned hit board can be rotated by the connection part with the above-mentioned post. This is because the backing plate and the inorganic fiber molded body can be brought into contact with each other following the inclination of the side surface of the inorganic fiber molded body. In addition, when carrying and aeration drying while continuously changing the width of the inorganic fiber molding on the production line, the backing plate is made to follow the inclination of the side surface of the inorganic fiber molding caused by switching the setting of the width. It is because it can contact.

  In the said invention, it is preferable to detect the position of the said inorganic fiber molded object, and to have a detection means which cancels | releases fixation of the said movable type | mold, or returns the said movable type | mold to an initial position. By detecting the position of the inorganic fiber molded body by the detection means, it is possible to seal the exposed area of the support means by the movable jig according to the presence or absence of the inorganic fiber molded body.

  In the present invention, an inorganic fiber molded body forming step of forming an inorganic fiber molded body, a binder liquid coating step of applying a binder liquid to the inorganic fiber molded body, and the inorganic fiber molded body coated with the binder liquid B. a through-air drying step of passing hot air in the thickness direction to dry, and using the through-air drying apparatus described above in the through-air drying step; provide.

  ADVANTAGE OF THE INVENTION According to this invention, the leak of the hot air at the time of carrying out through-drying of the inorganic fiber molded object by which the binder liquid was apply | coated can be prevented by using the above-mentioned through-drying apparatus in a through-drying process. Therefore, the drying efficiency is improved, the binder-containing inorganic fiber molded body can be dried uniformly in a short time, and the drying time can be shortened.

  In the above invention, it is preferable that the inorganic fiber molded body forming step, the binder solution applying step, and the through-air drying step are performed on the same conveying means. By using the above-described through-flow drying device in the through-flow drying step performed while conveying the inorganic fiber molded body on the production line, the effects of the present invention are easily exhibited.

  In the present invention, it is possible to prevent the leak of hot air when air-drying the inorganic fiber molded body, and it is possible to provide an air-drying apparatus capable of drying the inorganic fiber molded body with high drying efficiency. .

It is the model which shows an example of the ventilation drying apparatus of this invention, and an enlarged view of A part. It is a schematic perspective view which shows an example of the movable jig | tool in a clamping means. It is a schematic diagram which shows an example of the manufacturing method of the manufacturing method of the binder containing inorganic fiber molded object of this invention, and a schematic top view of a drying process. It is a schematic diagram explaining an example of the structure of the support | pillar in a movable type jig | tool. It is an explanatory view explaining other examples of the structure of a pillar in a movable type jig, and the change of the structure before and behind biasing. It is an explanatory view explaining other examples of the structure of a pillar in a movable type jig, and the change of the structure before and behind biasing. It is a schematic diagram explaining the example of the backing plate in a movable type jig | tool. It is explanatory drawing explaining the structure of the connection part of the support | pillar and a hit plate in a movable type | mold jig. It is a schematic diagram which shows an example of the cover part in a movable type jig | tool. It is a schematic perspective view which shows the other example of the movable jig in a clamping means. It is explanatory drawing explaining the function of the detection means in this invention.

  Hereinafter, the through-drying apparatus of the present invention and the method for producing a binder-containing inorganic fiber molded product using the same will be described in detail.

A. Ventilation Drying Device The ventilation drying device of the present invention has a large number of vent holes, and allows hot air to pass in the thickness direction of the inorganic fiber molding through the support means for supporting the inorganic fiber molding and the vent holes. A through-drying apparatus comprising: through-air drying means; and a sandwiching means for sandwiching the side surface of the inorganic fiber molded article, wherein the sandwiching means is a support that can extend and contract in a direction orthogonal to the side surface of the inorganic fiber molded article. A cover plate having a flat surface on the inorganic fiber molded body connected to the tip end of the support, and a plate-like lid disposed on the support side of the cover plate in contact with the lower end side of the cover plate; And the supporting column biases the cover plate and the cover in a direction perpendicular to the side surface of the inorganic fiber molded body, whereby the inorganic fiber molded body side of the cover plate is provided. The flat surface is in contact with the side surface of the inorganic fiber molded body, and It is characterized in that the lid portion closes the vent hole of the support means located closer to the support column than the cover plate.

In the present specification, that the support is used to bias the support plate means that the above-mentioned biasing force is applied when the support is extended, with the stress (hereinafter referred to as a compression elastic force) accumulated by the support being compressed. It means to push the board. The contact plate can be moved by a desired distance in a desired direction in which the inorganic fiber molded body is located from the position (initial position) before the urging according to the degree of the urging force.
Further, that the post urges the lid portion means that the post indirectly pushes the lid portion accompanying the pressing of the support plate with the biasing force. The lid portion can move by a desired distance in a desired direction in which the inorganic fiber molded body is positioned from a position (initial position) before being energized accompanying the movement of the backing plate.

The through-air drying apparatus of the present invention will be described with reference to the drawings. Fig.1 (a) is a schematic diagram which shows an example of the ventilation drying apparatus of this invention, FIG.1 (b) is the area | region enclosed by the dashed-dotted line part of Fig.1 (a) (A of FIG. 1 (a) Part). FIG. 2 is a schematic perspective view showing an example of the movable jig in the holding means.
The aeration drying apparatus 10 of the present invention has a large number of vent holes 11 and passes hot air in the thickness direction of the inorganic fiber compact 100 through the support means 1 for supporting the inorganic fiber compact 100 and the vent holes 11. And a sandwiching means 2 (a portion surrounded by a broken line) which sandwiches the side surface of the inorganic fiber molded body 100.
The aeration drying means shown in FIG. 1 allows the hot air 53 to pass from the upper surface side to the lower surface side of the inorganic fiber molded body 100 and sucks the hot air 53 passing from the air holes 11 of the support means 1 and then drains the hot air 53. This is an example of a circulation system in which the inorganic fiber molded body 100 is allowed to pass through the tank 51 and the heater 52 again. A binder liquid is applied to the inorganic fiber molded body 100.
The holding means 2 is a support 21 which can extend and contract in a direction perpendicular to the side surface of the inorganic fiber molded body 100, and a support plate 22 connected to the tip of the support 21 and having the inorganic fiber molded body side flat surface 22A The movable jig 20 is provided with a plate-like lid 23 disposed in contact with the lower end side of the backing plate 22 on the side of the column 21. In general, the side of the support 21 and the lid 23 opposite to the backing plate 22 is fixed to the wall surface 12 of the through-flow dryer. In the holding unit 2, the movable jig 20 is disposed to face the inorganic fiber molded body 100 so as to be able to hold the side surface of the inorganic fiber molded body 100.
The columns 21 of the movable jig 20 urge the abutment plate 22 and the lid 23 in the direction orthogonal to the side surface of the inorganic fiber molded body 100, that is, in the central direction of the inorganic fiber molded body 100 sandwiched by the sandwiching means 2. Have a function to The backing plate 22 is urged in a direction perpendicular to the side surface of the inorganic fiber molding 100 by the columns 21 to move toward the side surface of the inorganic fiber molding 100, and the inorganic fiber molding side flat plate of the backing plate 22. The surface 22A is in contact with the side surface of the inorganic fiber molded body 100. Thereby, the leak of the hot air 53 from the clearance gap which arises between the backing plate 22 and the inorganic fiber molded object 100 can be prevented. At the same time, the lid portion 23 is moved toward the side surface of the inorganic fiber molded body 100 by being biased by the support column 21, and is disposed on the support means 1 positioned closer to the support column 21 than the backing plate 22. As a result, the vent holes 11 in the region on the side of the support 21 of the support means 1 are closed, and the leak of the hot air 53 can be prevented.

  According to the present invention, the backing plate is urged to contact the side surface of the inorganic fiber molding according to the width and thickness of the inorganic fiber molding by the columns, so the inorganic fiber molding and the backing plate And prevent the occurrence of exposed areas of the support means. At the same time, the lid portion is also biased by the support column, so that the cover portion can close the exposed area of the support means positioned closer to the support column than the backing plate. As described above, since the exposed region of the support means is sealed by the movable jig, leakage of hot air from the exposed region can be prevented, and a through-flow drying device with high drying efficiency can be obtained.

In the through-flow drying apparatus of the present invention, the support means also serves as a transfer means for transferring the inorganic fiber molded body, and a plurality of the sandwiching means are disposed along the transport direction of the inorganic fiber molded body. Is preferred.
Fig.3 (a) is a schematic diagram which shows an example of the manufacturing method of the manufacturing method of the binder containing inorganic fiber molded object which used the through-flow drying apparatus of this invention, and FIG.3 (b) is in FIG. 3 (a). It is a top view of a ventilation drying device. In FIG. 3 (b), the support means and the through-air drying means are not shown. The example shown in FIG. 3 is a method of producing a binder-containing inorganic fiber molded body on a line, and in the through-flow drying apparatus, the support means also serves as the transport means.
In the method for producing a binder-containing inorganic fiber molded article using the through-flow drying apparatus of the present invention, first, an inorganic fiber molded article 100 'is produced by a needling treatment or the like (inorganic fiber molded article forming step, not shown), It is placed on a roller conveyor (support means) 1 having a vent and conveyed to a spray device 41. The spray device 41 is disposed on the spray nozzle 42 for spraying the binder liquid 32 and the surface of the inorganic fiber molded body 100 ′ on the opposite side to the application surface of the binder liquid 32, and collects the excess binder liquid 32 sprayed. The binder liquid 32 is sprayed onto one surface of the inorganic fiber molded body 100 ′ by the spray nozzle 42 (a binder liquid application step X).
Then, the inorganic fiber molded body 100 to which the binder liquid 32 is applied is conveyed to the through-flow drying device 10 and dried in the through-flow drying device 10 (through-air drying step Y). In the aeration drying apparatus 10, a plurality of sandwiching means 2 are disposed along the conveyance direction M of the inorganic fiber molded body 100, and the abutment plate 22 and the lid 23 are biased by the columns 21 to form inorganic fibers. The air holes of the roller conveyor 1 other than the area where the body 100 is placed are closed. The binder-containing inorganic fiber molded body 30 is obtained by removing the solvent, the dispersion medium, and the like in the inorganic fiber molded body 100 in the through-flow drying device 10. Thereafter, the binder-containing inorganic fiber molded body 30 is conveyed and wound up by the winding roll 44. In addition, in FIG. 3 (a), although the aspect which winds up the binder containing inorganic fiber molded object 30 with the winding roll 44 was shown, the aspect cut into a sheet form and collect | recovering may be sufficient.

The support means also serves as a transport means for transporting the inorganic fiber molded body, and a plurality of the sandwiching means are arranged along the transport direction of the inorganic fiber molded body, as described in FIG. When air-drying is performed while conveying the inorganic fiber molded body on the manufacturing line, it is possible to seal the exposed area of the support means by the movable jig according to the width of the inorganic fiber molded body.
Above all, according to the width of the inorganic fiber molded body 100 when carrying and aeration drying while continuously changing the widths D1 and D2 of the inorganic fiber molded body 100 on the production line as shown in FIG. By adjusting the biasing force received from the support plate 21 of the backing plate 22 and the lid 23, the backing plate 22 and the lid 23 can be moved to a desired position. Thereby, regardless of the width of the inorganic fiber molded body, the exposed area of the support means 1 can be efficiently sealed.

  Hereinafter, the through-flow drying device of the present invention will be described.

1. Holding Means The holding means in the present invention holds the side surface of the inorganic fiber molded body.
The holding means includes: a support column expandable in a direction perpendicular to the side surface of the inorganic fiber molded body; a cover plate connected to the tip of the support column having a flat surface on the inorganic fiber molded body side; It has a movable jig provided with the plate-like lid part arrange | positioned in contact with the lower end side of the said contact plate at the support | pillar side.

The movable jig is normally fixed at an initial position, and when the movable jig is not fixed, the support supports the abutment plate and the lid with a desired biasing force. The initial position of the moveable jig is the position at which the post is most retracted and is usually located at the end or outside of the support means.
Hereinafter, each part of the movable jig will be described.

(1) Support | pillar The said support | pillar is a member which can be expanded-contracted to an orthogonal direction with respect to the side of the said inorganic fiber molded object. The post has a function of biasing the contact plate and the lid in a direction orthogonal to the side surface of the inorganic fiber molded body.
The tip of the above-mentioned pillar on the opposite side to the side connected with the above-mentioned hit plate is usually fixed to the wall surface etc. of a ventilation drier.
Here, that the expansion and contraction direction of the support is “a direction perpendicular to the side surface of the inorganic fiber molded body” means that the width between the opposing side surfaces of the inorganic fiber molded body sandwiched by one sandwiching means is a constant width In addition, it means that the direction is orthogonal to the side surface. In addition, in the case of carrying the inorganic fiber molded body, the direction in which the stretch direction of the support is “a direction orthogonal to the side surface of the inorganic fiber molded body” means “a direction orthogonal to the conveying direction of the inorganic fiber molded body” (ie, It can be paraphrased that it is "width direction of an inorganic fiber molded object".

The support is not particularly limited as long as it can apply stress in the direction in which the inorganic fiber molded body is positioned with respect to the backing plate and the lid, but the support must retain a compressive elastic force at the initial position. It is preferable to have an elastic part that can be As an elastic member which comprises an elastic part, the compression elastic member which shows compression elastic deformation, specifically, a compression coil spring and a gas spring are mentioned.
In the initial position of the support, the elastic member is in the most compressed state and retains the compressive elastic force. When the post extends from the initial position, a part or all of the above-mentioned compressive elastic force becomes an urging force for urging the backing plate and the lid.

It is preferable that the elastic member has a large elastic modulus from the viewpoint of widening options of design of the holding means which enables biasing of the backing plate and the lid. The elastic modulus can be designed as appropriate. However, if the elastic modulus is too large, an extra stress is applied to the inorganic fiber molded body when the backing plate and the inorganic fiber molded body come in contact with each other, causing bending or wrinkling. It may occur.
In addition, other physical properties such as deflection of the elastic member can be appropriately designed.

The structure of the above-mentioned support may be a structure constituted only by the above-mentioned elastic part 21A as exemplified in FIG. 4 (a), and as shown in FIG. 4 (b), It may be a structure having a fixed shaft portion 21B to be connected, and an elastic portion 21A connected to the fixed shaft portion 21B and biasing the contact plate 22 and the lid portion (not shown) through the fixed shaft portion 21B. . Further, as illustrated in FIG. 5, the above-described support may further include a fixing frame 21 </ b> C that fixes the biasing direction W of the elastic portion 21 </ b> A in the structure of FIG. At least a part of the elastic portion 21A is located in the fixed frame 21C, and the fixed frame 21 is usually fixed to the wall surface 12 of the through-flow dryer.
Among other things, the above-mentioned column is connected to the structure illustrated in FIG. 5, that is, the fixed shaft connected to the pad and the fixed shaft, and biasing the pad and the lid through the fixed shaft. It is preferable to have an elastic portion to be fixed and a fixing frame for fixing the biasing direction of the elastic portion. If there is a degree of freedom in the direction of movement of the elastic part, it may not be possible to bias the cover plate and the lid in the desired direction, but by fixing the biasing direction of the elastic part by the fixing frame, FIG. As illustrated in (b), the backing plate 22 and the lid (not shown) can be biased in a desired direction.

When the above-mentioned support has a fixed frame, the above-mentioned fixed frame may be extensible. The expandable fixed frame includes, for example, an outermost fixed frame and one or more inner fixed frames located in the outermost fixed frame, and the inner fixed frame is movable in the biasing direction of the elastic portion. The aspect which has a structure is mentioned.
Specifically, as illustrated in FIG. 6, the fixing frame 21C is the outermost fixing frame 121 located at the outermost position, a first inner fixing frame 122 located inside the outermost fixing frame 121, and a first inner The first inner fixing frame 122 and the second inner fixing frame 123 are accommodated in the outermost fixing frame 121 at the initial position by being configured of the second inner fixing frame 123 positioned inside the fixing frame 122. (FIG. 6A), the first inner fixed frame 122 and the second inner fixed frame 123 can slide in the biasing direction W of the elastic portion 21A according to the biasing force of the elastic portion 21A (FIG. 6A). (B) to (c).
By setting it as an expandable fixed frame, regardless of the moving distance of the backing plate and the lid, the backing plate and the lid can be accurately biased in a desired direction.
When the support includes a fixed frame having a slide structure, the support may have a plurality of fixed frames with respect to a single elastic portion as illustrated in FIG. It may be a mode which has a fixed frame which has and has a fixed direction which has an elastic part every.
In addition, FIG. 4 is a schematic diagram which shows the example of the structure of a support | pillar, and has shown the structure in an initial position. 5 to 6 are schematic views showing another example of the structure of the support, and FIGS. 5 (a) and 6 (a) show the structure at the initial position, FIGS. 5 (b) and 6 (b). ) To (c) show the structure when the backing plate is biased.

(2) Patch board The patch board is a member having a flat surface on the inorganic fiber molded body side, which is connected to the tip of the support.

  The backing plate may be made of any material that can withstand the temperature of hot air, and examples thereof include metal plates such as aluminum plates, ceramic plates such as alumina plates, and resin plates such as Teflon (registered trademark) plates.

The thickness of the backing plate may be any thickness as long as it can be self-supporting, and for example, preferably in the range of 2 mm to 10 mm. The backing plate having a self-supporting property can be present in a tangible state regardless of the presence or absence of contact with the support or the lid, and can maintain the planarity of the inorganic fiber molded body-side flat surface means.
In addition, the height of the backing plate may be any height as long as the side surface of the inorganic fiber molding and the flat plate surface on the inorganic fiber molding side of the backing plate are aligned, and should be appropriately designed according to the thickness of the inorganic fiber molding However, the thickness is preferably equal to or greater than the thickness of the inorganic fiber molding.

The backing plate may have an inorganic fiber molded body-side flat surface, but as illustrated in FIG. 7A, a bent portion in which a part of the end portion is bent toward the inorganic fiber molded body-side flat surface 22A. May be included. Further, as illustrated in FIG. 7 (b), the backing plate flattens the protrusions 131 projecting from the inorganic fiber molded body-side flat surface 22A to the flat side of the inorganic fiber molded body, and the upper surface of the inorganic fiber molded body A flat plate-like upper surface pressing plate 132 may be provided, and an elastic body 133 connecting the protrusion 131 and the upper surface pressing plate 132 may be provided. The height position of the upper surface pressure plate can be adjusted according to the thickness of the inorganic fiber molded body by the elastic body connecting the upper surface pressure plate and the projection. The projection may be separate from or integral with the upper pressure plate.
By making the backing plate into such a shape or structure, the upper surface of the inorganic fiber molding can be pressed and flattened by the bent portion or the upper surface pressing plate, and the contact between the backing plate and the side surface of the inorganic fiber molding In this case, it is possible to prevent the end of the inorganic fiber molding from being curled up by the biasing force of the backing plate and to prevent the inorganic fiber molding from being bent or wrinkled.
Further, the backing plate may have a slide structure that can be extended and contracted in the height direction, as illustrated in FIG. 7 (c). This is because the height of the backing plate can be adjusted. As for extension and contraction of the slide, a control mechanism may be provided which can be extended or retracted automatically or manually depending on the thickness of the inorganic fiber molding. In the cover plate 22 illustrated in FIG. 7C, the projection 131 functions as an upper surface holding plate because the height position of the projection 131 is also changed along with the height adjustment of the cover plate 22 by sliding. be able to.
7 (a) to 7 (c) are schematic views for explaining an example of the backing plate, which corresponds to a view from the side in the thickness direction of the backing plate.

The backing plate is connected to the tip of the support. The tip of the support is connected to a surface of the backing plate that faces the flat plate surface on the inorganic fiber molded body side (hereinafter, may be the surface on the support side).
The connecting position with the tip of the support on the support side surface of the backing plate is not particularly limited, but is preferably a position corresponding to the central position in the thickness direction of the inorganic fiber molding. When the backing plate comes in contact with the inorganic fiber molded body, it can contact uniformly in the side direction of the inorganic fiber molded body. The center position in the thickness direction of the inorganic fiber molded body refers to a half position of the thickness of the inorganic fiber molded body, and is a portion indicated by T in FIG.
When the backing plate and the tip of the support are connected, the backing plate and the support are separate members, and the tip of the support may be in contact with the backing plate and connected, and the support plate and a part of the support It may be integral, and the tip of the support may be connected as it is with the backing plate.

As shown in FIG. 8 (a), the contact plate P may be fixed at the connection portion P with the support 22. As shown in FIG. 8 (b), the connection portion P with the support 22 is rotated. It may be possible. Above all, it is preferable that the backing plate be pivotable at the connecting portion with the support. This is because the backing plate and the inorganic fiber molded body can be brought into contact with each other following the inclination of the side surface of the inorganic fiber molded body. In addition, when carrying and aeration drying while continuously changing the width of the inorganic fiber molding on the production line, the backing plate is made to follow the inclination of the side surface of the inorganic fiber molding caused by switching the setting of the width. It is because it can contact.
FIGS. 8 (a) and 8 (b) are explanatory views for explaining the structure of the connection portion between the support and the backing plate, and correspond to a top view.

(3) Lid part The lid part in the present invention is a plate-like member arranged in contact with the lower end side of the touch plate on the support side of the touch plate.
The lid portion has a function of closing the vent hole of the support means located closer to the support column than the backing plate.

The lid has a structure in which the length can be adjusted in the direction orthogonal to the conveyance direction of the inorganic fiber molding, in the case where the conveyance of the inorganic fiber molding is accompanied with the direction perpendicular to the side of the inorganic fiber molding For example, as shown in FIG. 9A, the sliding structure can be made up of a door pocket 23A and a cover plate 23B. Since the lid has such a structure, the lid plate is moved in a desired direction (FIG. 9) according to the size of the exposed area of the support means positioned closer to the column than the backing plate under the biasing force of the column. It is possible to slide in the Z direction and adjust the length of the lid. Further, in the slide structure, as shown in FIG. 9B, the length of the lid portion 23 may be adjusted by sliding movement of the plurality of lid plates 23B.
FIG. 9 is a schematic view showing an example of the lid, and for the sake of explanation, the door bag 23A is displayed so that the inside can be visually recognized in FIG. 9 (a).

  The lid is usually fixed in part to the wall surface or the like of the through-flow dryer. If it is a lid of a slide structure, as shown in FIG. 9, the door pocket 23A is fixed to the wall surface 12 of the through-flow dryer, and the lid plate 23B is accommodated in the door pocket 23A at the initial position.

The lid portion is generally flat since it is necessary to prevent hot air leak by sufficiently closing the vent holes of the support means located closer to the support column than the backing plate.
The lid portion is disposed in contact with the lower end side of the backing plate. If the lid is in contact with the lower end side of the backing plate, the lid 23 may be in contact with the lower end side of the backing plate 22 by placing the backing plate 22 on the lid 23 as shown in FIG. Although not shown, when the inorganic fiber molded body side surface of the lid portion is in contact with the support pole side surface of the backing plate, the lid portion may be in contact with the lower end side of the backing plate.
Further, the cover plate of the cover may be integral with the cover plate. In the case of having a plurality of lid plates, the lid plate in contact with the lower end side of the backing plate may be integral with the backing plate.

The lid plate constituting the lid portion may be made of a material that can withstand the temperature of hot air without ventilation, and examples thereof include a metal plate such as an iron plate or a SUS plate, or a resin plate such as a Teflon plate .
The thickness of the lid portion and each lid plate is not particularly limited as long as it can be moved by urging by a column and the thickness does not allow air to flow.

(4) Auxiliary plate It is preferable that the movable jig has an auxiliary plate connected to the lower end side of the backing plate and extended on the side opposite to the support side, and provided with a large number of vent holes. FIG. 10 is a schematic perspective view showing another example of the movable jig, and shows an example provided with an auxiliary plate 25 having a large number of vent holes 26. As shown in FIG. Since the movable jig has the above-described auxiliary plate, the auxiliary plate is inserted between the inorganic fiber molded body and the supporting means to stabilize the arrangement of the movable jig, and the backing plate and the inorganic fiber molded body The side surfaces can be brought into contact with accuracy. In addition, since the auxiliary plate is provided with a large number of air holes, even if it is inserted between the inorganic fiber molded body and the support means, the air flow in the inorganic fiber molded body is not impeded, and the hot air per unit time The flow rate can be maintained.

The auxiliary plate may be made of any material that can withstand the temperature of the hot air, but among them, a material that has a small frictional force with the inorganic fiber molded body and a support member used for the support means described later is preferable. When the frictional force between the auxiliary plate and the inorganic fiber molded body or the support member is large or the auxiliary plate is easily worn, there is a risk that bending or wrinkles may occur at the contact portion between the auxiliary plate and the inorganic fiber molded body. This is because when the inorganic fiber molded body is transported during drying, the above-mentioned problems are likely to occur remarkably. Moreover, it is because there exists a possibility that conveyance of an inorganic fiber molded object may be inhibited by friction with an auxiliary plate, when conveyance is accompanied in the case of drying of an inorganic fiber molded object.
As such a material, for example, metal, ceramic, resin, etc. can be selected in consideration of the friction coefficient of the inorganic fiber molded body or the support member, and the like. Further, the auxiliary plate may be made of the same material as the lid plate or the cover plate of the lid described above, or may be different.
Furthermore, the auxiliary plate may be subjected to surface treatment to reduce the surface roughness in order to reduce the frictional force to the inorganic fiber molded body or the support member.

The size of the air holes provided in the auxiliary plate may be any size that allows air flow to the inorganic fiber molded body and does not reduce the flow rate of the hot air passing through the inorganic fiber molded body, among which the support means has Preferably it is larger than the vent.
The shape and number of the vents are not particularly limited as long as the inorganic fiber molded body can be ventilated and the flow rate per unit time of the hot air passing through the inorganic fiber molded body is reduced.

The thickness of the auxiliary plate is not particularly limited as long as it can be inserted between the inorganic fiber molded body and the support means, but is preferably thin. If the thickness of the auxiliary plate is too thick, bending, wrinkling and the like may occur at the contact portion between the auxiliary plate and the inorganic fiber molded body, and furthermore, drying unevenness may occur at the contact portion.
In addition, the width of the auxiliary plate may be set appropriately as long as it does not inhibit the ventilation to the inorganic fiber molded body and the placement and transportation of the inorganic fiber molded body.

(5) Optional members The movable jig may have, in addition to the members described above, a guide rail for assisting expansion and contraction of the lid, a stopper for fixing the movable jig at an initial position, and the like. .

2. Aeration and Drying Means The aeration and drying means in the present invention is for passing hot air in the thickness direction of the inorganic fiber molding through the air holes.
The aeration drying means may be a circulation system in which the hot air having passed through the inorganic fiber molded body is circulated to pass through the inorganic fiber molded body again, and is an open system in which the hot air having passed through the inorganic fiber molded body is exhausted It is also good. Among them, the circulation system is preferable.

  The configuration of the aeration and drying means is appropriately designed according to the circulation system and the opening system, but for example, in the case of a circulation system periodic drying means, a heater for heating air to make hot air, an injection unit for ejecting hot air, It has a blower fan for sending hot air to the jet portion, an intake fan for promoting the passage of the hot air in the inorganic fiber molding, a drain tank for removing waste liquid in the hot air discharged from the inorganic fiber molding, and the like.

3. Supporting Means The supporting means in the present invention has a large number of air holes and supports the inorganic fiber molded body, and the fixing type or the conveying means may be used depending on the conveyance of the inorganic fiber molded body during the through-drying. It can be a mobile type.
As a support member used for the support means, usually, it is sufficient to have a flat surface and to have a large number of vent holes on the flat surface, for example, punching metal, expand metal, resin net, wire net, etc. Can be mentioned. As a shape of the said supporting member, it is suitably designed according to the presence or absence of conveyance of an inorganic fiber molded object, such as plate shape, conveyor shape, etc., for example.

  The material of the support member may be any material as long as it can withstand the temperature of through-air drying, and examples thereof include metals and resins. Among them, metals are preferable. Because the heat conductivity is high, drying can be performed efficiently.

A large number of vent holes may be provided in the support member. This is because the drying time can be shortened. The vents may be provided at equal intervals or at different intervals, but are preferably provided at equal intervals to enable uniform drying.
The size and shape of the air vent are not particularly limited as long as the size and shape allow the passage of hot air sufficient to allow the inorganic fiber molded body to pass through and dry.
The pattern of the vent holes is not particularly limited, and examples thereof include a mesh shape, a lattice shape, and the like.

  When the support means also serves as the transport means, the support means may have a guide roll or the like for assisting the drive of the support member, in addition to the support member.

Although the support means usually supports the above-mentioned inorganic fiber molded body by placing the above-mentioned inorganic fiber molded body on one support member, the upper and lower surfaces of the above-mentioned inorganic fiber molded body are sandwiched and supported by two support members. It may be. When sandwiching with two support members, the bulk density of the inorganic fiber molding can be increased.
When the support means has two support members, the vent holes of the support member located on the lower surface side of the inorganic fiber molded body are sealed by the cover plate and the lid.

4. Other Configurations The through-flow drying apparatus according to the present invention may have detection means for detecting the presence of the inorganic fiber molded body to release the fixing of the movable jig or return the movable jig to the initial position. preferable. By detecting the position of the inorganic fiber molded body by the detection means, it is possible to seal the exposed area of the support means by the movable jig according to the presence or absence of the inorganic fiber molded body.
That is, when the detection means detects that the inorganic fiber molded body is present on the support means, the fixation of the movable jig is released, so that the exposed area of the support means can be sealed.
On the other hand, when the detecting means detects that the inorganic fiber molded body is not present on the supporting means, the movable jig after being energized returns to the original initial position, so the movable jig is manually moved to the initial position. There is no need to perform back operation. In addition, since the movable jig does not stagnate at the position after the urging, it does not disturb the placement and the conveyance of the inorganic fiber molding at the time of the next drying.

In particular, in the case where the detection means also serves as a conveyance means for conveying the inorganic fiber molded body, and the plurality of sandwiching means are arranged along the conveyance direction of the inorganic fiber molded body, that is, the detection means It is preferable to have it when carrying out through-drying while conveying an inorganic fiber molded object on a production line.
FIG. 11 is an explanatory view for explaining the function of the detection means on the manufacturing line. In FIG. 11, the movable jig and the members provided in the movable jig will be omitted from the reference numerals. As shown in FIGS. 11 (a) to 11 (c), the detection means 3 detects the position L where the inorganic fiber molded body 100 is present on the production line, and the pinch located on the downstream side in the transport direction M than the detection position. By releasing the fixing of the movable jig 20 of the means 2 (FIG. 11A), each member of the movable jig 20 moves from the initial position F. Thereby, it is possible to seal the exposed area of the support means 1 in accordance with the transportation without inhibiting the transportation of the inorganic fiber molded body 100 (FIG. 11 (b)). Further, when the conveyance of the inorganic fiber molded body 100 is finished and the detection means 3 detects the absence of the inorganic fiber molded body 100 at the desired position on the support means 1, the movable jig 20 of the holding means 2 is at the initial position. Return to F (FIG. 11 (c)). As a result, the movable jig does not stagnate at the position after the urging, so that the conveyance of the inorganic fiber molding to be conveyed next is not hindered.
At this time, it is preferable that the detection unit has an adjustment unit that detects the width of the inorganic fiber molded body and adjusts the moving position of the movable jig. This is because the movement of the movable jig in accordance with the detected width can appropriately seal the exposed area of the support means.

5. Applications Although the through-drying apparatus of the present invention can be suitably used when through-drying an inorganic fiber molded body containing a binder, it is not limited thereto, and can be used for any member that requires through-drying. In particular, it is a member manufactured on a line, and it can be suitably used as a drying device when performing through-flow drying while conveying the above-mentioned member.

B. Process for producing binder-containing inorganic fiber molded article The method for producing a binder-containing inorganic fiber molded article of the present invention comprises the steps of: forming an inorganic fiber molded article for forming an inorganic fiber molded article; A liquid drying step, and a through-air drying step of passing hot air through in the thickness direction of the inorganic fiber molded body to which the binder liquid is applied to dry, and in the through-air drying step, “A. It is a manufacturing method characterized by using the through-air drying apparatus described in the section of the apparatus.

  About the manufacturing method of the inorganic fiber molded object of this invention, since it demonstrated using FIG. 3 in the term of "A. aeration drying apparatus", description here is abbreviate | omitted. In addition, in FIG. 3A, X is a binder liquid application process, and Y is a through-air drying process.

ADVANTAGE OF THE INVENTION According to this invention, the leak of the hot air at the time of carrying out through-drying of the inorganic fiber molded object by which the binder liquid was apply | coated can be prevented by using the above-mentioned through-drying apparatus in a through-drying process. Therefore, the drying efficiency is improved, the binder-containing inorganic fiber molded body can be dried uniformly in a short time, and the drying time can be shortened.
Hereinafter, the manufacturing method of the inorganic fiber molded object of this invention is demonstrated for every process.

1. Inorganic Fiber Molded Body Forming Step The inorganic fiber molded body forming step in the present invention is a step of forming an inorganic fiber molded body.
The inorganic fiber molded body formed in the present step is a non-woven aggregate of inorganic fibers and is in the form of a sheet. The sheet-like inorganic fiber moldings are, for example, those called mats, blankets or blocks.

  The inorganic fibers used to form the inorganic fiber molding are not particularly limited, and examples thereof include silica, alumina / silica, zirconia containing these, spinel, titania and the like alone, or composite fibers. Among them, alumina / silica fibers are preferable, and crystalline alumina / silica fibers are particularly preferable. The composition ratio (weight ratio) of alumina / silica of the alumina / silica fiber is preferably in the range of 60 to 98/40 to 2, more preferably in the range of 70 to 74/30 to 26.

  The average fiber diameter of the inorganic fibers is preferably in the range of 3 μm to 8 μm, and more preferably in the range of 5 μm to 7 μm. If the average fiber diameter of the inorganic fiber is too large, the cold compression cycle characteristics of the inorganic fiber molded product may be lost, and if it is too small, the amount of dust floating in the air may be increased.

  It does not specifically limit as a manufacturing method of an inorganic fiber molded object, A well-known arbitrary method is employable. Among them, it is preferable that the inorganic fiber molded body is subjected to a needling treatment. By the needling treatment, not only a strong inorganic fiber molded body in which inorganic fibers constituting the inorganic fiber molded body are entangled can be obtained, but also the thickness of the inorganic fiber molded body can be adjusted.

  It does not specifically limit as thickness of an inorganic fiber molded object, According to a use etc., it selects suitably, For example, it can be about 2 mm-about 50 mm.

  The inorganic fiber molding may be long or sheet-like. Among them, it is preferable that the inorganic fiber molded body be long, since the production can be performed on a line. The long inorganic fiber molded body may have a uniform width or may have a plurality of regions with different widths.

2. Binder Liquid Coating Step The binder liquid coating step in the present invention is a step of coating a binder liquid on the inorganic fiber molded body.

(1) Binder liquid As a binder contained in a binder liquid, both an organic binder and an inorganic binder can be used. Among them, it is preferable to use at least an organic binder. In this case, only an organic binder may be used, or an organic binder and an inorganic binder may be used in combination. Since the organic binder can be decomposed and removed by heating, the thickness of the binder-containing inorganic fiber molded article can be restored by decomposing and removing the organic binder by heating when using the binder-containing inorganic fiber molded article, and the binder-containing inorganic fiber molded article The inorganic fiber molded body can be suitably used, for example, as a holding material for an exhaust gas purification device.

  As an organic binder, various rubber | gum, a water soluble high molecular compound, a thermoplastic resin, a thermosetting resin etc. can be used, for example. Among them, synthetic rubbers such as acrylic rubber and nitrile rubber; water-soluble polymer compounds such as carboxymethyl cellulose and polyvinyl alcohol; and acrylic resins are preferable. In particular, acrylic resins which are not contained in acrylic rubber, nitrile rubber, carboxymethyl cellulose, polyvinyl alcohol and acrylic rubber are preferable. These organic binders are easy to prepare or obtain an organic binder liquid, are easy to apply to inorganic fiber moldings, and exert sufficient thickness constraint even with a relatively low content, and obtained The molded body is flexible and excellent in strength, and can be suitably used because it is easily decomposed or burnt out under use temperature conditions. The organic binder may be used alone or in combination of two or more.

Examples of the inorganic binder include inorganic oxides, and specific examples include alumina, spinel, zirconia, magnesia, titania, calcia, and materials having the same composition as the above-mentioned inorganic fibers. The inorganic binder may be used alone or in combination of two or more.
The particle size of the inorganic oxide can be, for example, 1 μm or less.

  The solvent and the dispersion medium contained in the binder solution are appropriately selected according to the type of the binder and the binder solution, and examples thereof include water and an organic solvent. The solvent and the dispersion medium may be used alone or in combination of two or more.

As the binder liquid, in the case of an organic binder, an aqueous solution containing the above organic binder, an emulsion of water dispersion type, latex, or an organic solvent solution can be used. These are commercially available, and these organic binder liquids can be used as they are or after dilution with water or the like, and can be suitably used for applying the organic binder liquid to an inorganic fiber molded body. In particular, an emulsion is preferred. The organic binder liquid may contain an inorganic binder.
In the case of an inorganic binder, as the binder liquid, sol, colloid, slurry, or solution containing the above-mentioned inorganic binder can be used. The inorganic binder liquid may contain an organic binder. In addition, a dispersion stabilizer may be added to the inorganic binder liquid in order to enhance the stability of the inorganic binder. Examples of the dispersion stabilizer include acetic acid, lactic acid, hydrochloric acid, nitric acid and the like.

  The binder concentration in the binder solution may be set to such an extent that the binder solution can be uniformly applied to the inorganic fiber molded body, and is appropriately adjusted according to the type of binder and the coating method. For example, the binder concentration in the binder solution is preferably in the range of 3% by mass to 50% by mass. When the binder concentration is too low, it becomes difficult to make the content of the binder in the binder-containing inorganic fiber molding into a desired range. In addition, when the binder concentration is too high, it is difficult for the binder to impregnate the inorganic fiber molded body, and various physical properties such as workability and thermal properties and strength of the binder-containing inorganic fiber molded body may be deteriorated.

(2) Application method The application method of the binder liquid is not particularly limited as long as the method can uniformly apply the binder liquid to the inorganic fiber molded body, and for example, a kiss coat method, a spray method, an immersion method, It can be appropriately selected from general coating methods such as roll coating, gravure coating, die coating, curtain coating and the like. The application of the binder solution may be repeated several times.

  When the binder liquid is applied to the inorganic fiber molded body, the binder liquid may be applied to one side or both sides of the inorganic fiber molded body, and among them, it is preferable to apply only to one side. When the binder liquid is applied only to one side of the inorganic fiber molded body, the inorganic fiber molded body is drawn by suctioning hot air from the surface of the inorganic fiber molded body opposite to the application surface of the binder liquid in the through-air drying process. The binder solution can be moved from the application surface of the binder solution to the opposite surface, and localization of the binder on the application surface of the inorganic fiber molding can be suppressed. Moreover, migration of the binder at the time of through-air drying can be suppressed by letting hot air pass from the application surface of the binder liquid of the inorganic fiber molded body in the through-air drying step.

  The application amount of the binder liquid to the inorganic fiber molded body is appropriately selected according to the type of inorganic fiber or binder liquid, the binder concentration in the binder liquid, the thickness of the binder-containing inorganic fiber molded body, the use, etc. The binder solid content with respect to the inorganic fibers in the inorganic fiber molded body described later is appropriately adjusted so as to be in a desired range.

3. Aeration Drying Step The aeration drying step in the present invention is a step of passing hot air through in the thickness direction of the inorganic fiber molding to which the binder solution is applied, and drying.
This process is characterized by using the through-drying apparatus described in the section "A. through-drying apparatus".

  The aeration drying apparatus used in this process is the same as the contents described in the section “A. Aeration drying apparatus”, and thus the description thereof is omitted here.

  This process is performed by passing hot air in the thickness direction of the inorganic fiber molded body. Above all, it is preferable to pass hot air from the application surface of the binder liquid of the inorganic fiber molded body. When hot air is passed in the thickness direction from the application surface of the binder liquid of the inorganic fiber molded body, the solvent, the dispersion medium, and the liquid of the binder liquid evaporate in the thickness direction with the hot air when vaporized, so that migration can be suppressed. it can. Therefore, the binder can be kept contained in the inside of the inorganic fiber molded body.

  At the time of air-drying, the inorganic fiber molded body may be sandwiched between two support members of the support means to perform air-drying. This is because the inorganic fiber molding can be dried uniformly. The inorganic fiber molded body may be compressed while holding the inorganic fiber molded body between two support members. This is because the bulk density of the inorganic fiber molded body can be increased.

  As a drying temperature, it selects suitably according to the processing capacity of a passage drier, the kind of binder liquid, and liquid, etc. For example, the drying temperature may be equal to or higher than the boiling point of the liquid, and specifically, is preferably in the range of 80 ° C. to 160 ° C. If the drying temperature is too low, the binder can not be sufficiently dried. If the drying temperature is too high, the binder may be denatured or the solvent of the binder liquid or the rapid evaporation of the dispersion medium may occur to cause migration.

  The other drying conditions such as the aeration amount at the time of aeration drying, the drying time, and the like are appropriately adjusted so that the liquid can be removed from the inorganic fiber molded body, and the binder in the binder liquid is not removed. For example, the drying time can be about 2 minutes to 10 minutes.

  When an inorganic binder is used, baking is usually performed after through-flow drying. Firing conditions can be appropriately selected from general firing conditions in the method for producing a binder-containing inorganic fiber molded body containing an inorganic binder.

4. Optional Steps In the present invention, in addition to the above-described steps, a dewatering step of removing liquid from the inorganic fiber molded body may be performed between the binder liquid application step and the through-flow drying step. It is because it becomes easy to remove the liquid contained in inorganic fiber moldings, such as a solvent of a binder liquid, by a through-drying process, and shortening of a drying time can be achieved.

As a liquid removal method, suction, pressurization, compression etc. are mentioned, for example. Among them, suction and drainage are preferable, and it is preferable to suck the liquid from the surface of the inorganic fiber molded product opposite to the surface on which the binder liquid is applied. As the liquid moves from the application surface of the inorganic fiber molded body to the opposite surface from the application surface of the binder liquid, the binder liquid can also be moved, and the binder can be made uniform.
The method of suction and liquid drainage is not particularly limited as long as it is a method capable of suctioning a liquid, and examples thereof include a method of reducing the pressure on the surface of the inorganic fiber molded body opposite to the liquid application surface.
In addition, in the case of pressure drainage, the surface to which the liquid of the inorganic fiber molded body is applied may be pressurized. It is because a binder liquid can also be moved as a liquid moves to the surface on the opposite side from the application surface of the liquid of an inorganic fiber molded object.

  The liquid removal conditions such as the pressure at the time of liquid removal and the liquid removal time are appropriately adjusted so that the binder in the binder liquid is not removed.

5. Others In the present invention, it is preferable that the inorganic fiber molded body forming step, the binder solution applying step, and the through-air drying step are performed on the same conveying means. By using the above-described through-flow drying device in the through-flow drying step performed while conveying the inorganic fiber molded body on the production line, the effects of the present invention are easily exhibited. The reason is the same as the contents described in the section “A. Ventilation drying device”, and therefore the description thereof is omitted here.

6. Binder-Containing Inorganic Fiber Molding In the present invention, a binder-containing inorganic fiber molding having an inorganic fiber molding and a binder contained in the inorganic fiber molding can be obtained.
The content of the binder in the binder-containing inorganic fiber molding is not particularly limited, and is appropriately selected according to the types of inorganic fibers and binders, the thickness of the binder-containing inorganic fiber molding, use, and the like. For example, the binder solid content in the binder-containing inorganic fiber molding is preferably in the range of 0.5 parts by mass to 10.0 parts by mass with respect to 100 parts by mass of the inorganic fibers in the inorganic fiber molding. If the binder solid content is too small, the desired thickness of the binder-containing inorganic fiber molded product may not be obtained, and if too large, the cost increases. In the case of the organic binder, when the solid content of the organic binder is large, the organic binder may not be easily decomposed or the working environment may be deteriorated by the gas generated by the decomposition of the organic binder. Moreover, in the case of an inorganic binder, when the amount of solid content of the inorganic binder is large, the cushioning property may be impaired.

  The binder-containing inorganic fiber molded body can be applied to, for example, a heat insulating material, a refractory material, a cushioning material (holding material), a sealing material, and the like. Among them, the binder-containing inorganic fiber molded body is suitable as a holding material for an exhaust gas purification device. The binder-containing inorganic fiber molded product is high in shear strength and small in frictional force with respect to the casing, so is excellent in assemblability, suppresses deviation of the binder-containing inorganic fiber molded product and the catalyst carrier or particle filter at the time of press-in The holding power of the inorganic fiber molding can be increased.

The exhaust gas purification apparatus comprises, for example, a catalyst carrier or particle filter, a metallic casing for containing the catalyst carrier or particle filter, and a support material interposed between the catalyst carrier or particle filter and the casing. Specifically, a catalytic converter and a diesel particulate filter (DPF) can be mentioned.
The configuration of the exhaust gas purification apparatus is not particularly limited, and the binder-containing inorganic fiber molded body in the present invention can be applied to a general exhaust gas purification apparatus having the above-described configuration.

  The present invention is not limited to the above embodiment. The above embodiment is an exemplification, and it has substantially the same configuration as the technical idea described in the claims of the present invention, and any one having the same function and effect can be used. It is included in the technical scope of the invention.

DESCRIPTION OF SYMBOLS 1 ... Support means 2 ... Sandwiching means 3 ... Detection means 10 ... Ventilation drying device 11 ... Air vent 20 ... Movable jig 21 ... Post 22 ... Backing plate 22A ... Inorganic fiber molding side flat surface 23 ... Lid part 30 ... Binder content Inorganic fiber molding 100 ... inorganic fiber molding

Claims (7)

A support means having a large number of vents and supporting the inorganic fiber molding;
Ventilation drying means for passing hot air in the thickness direction of the inorganic fiber molding through the ventilation holes;
Holding means for holding the side surface of the inorganic fiber molding;
A through-flow drying device having
The holding means may be a post that can extend and contract in a direction orthogonal to the side surface of the inorganic fiber molded body;
A backing plate having a flat surface on the inorganic fiber molded body side connected to the tip of the support;
A plate-like lid disposed on the support side of the backing plate in contact with the lower end side of the backing plate;
A movable jig provided with
The support fiber biases the cover plate and the lid in a direction perpendicular to the side surface of the inorganic fiber molded body, whereby the inorganic fiber molded body-side flat surface of the cover plate and the side surface of the inorganic fiber molded body A through-drying apparatus according to claim 1, wherein the cover is in contact and the lid closes the vent of the support means located closer to the support than the backing plate. The supporting means also serves as a conveying means for conveying the inorganic fiber molded body,
The through-drying apparatus according to claim 1, wherein a plurality of the sandwiching means are disposed along the transport direction of the inorganic fiber molded body. The post is a fixed shaft connected to the backing plate;
An elastic portion coupled to the fixed shaft portion and biasing the contact plate and the lid portion via the fixed shaft portion;
A fixing frame for fixing the biasing direction of the elastic portion;
The through-air drying apparatus according to claim 1 or 2, further comprising:   The through-flow drying apparatus according to any one of claims 1 to 3, wherein the backing plate is rotatable at a connecting portion with the support column.   5. The apparatus according to claim 1, further comprising detection means for detecting the position of the inorganic fiber molded body to release the fixation of the movable jig or to return the movable jig to an initial position. Ventilation drying apparatus according to any of the preceding. An inorganic fiber molded body forming step of forming an inorganic fiber molded body;
A binder liquid application step of applying a binder liquid to the inorganic fiber molded body;
An air-drying step of drying by passing hot air in the thickness direction of the inorganic fiber molded body to which the binder solution is applied;
Have
A method for producing a binder-containing inorganic fiber molded body, comprising using the through-air drying apparatus according to any one of claims 1 to 5 in the through-air drying step.   The method for producing a binder-containing inorganic fiber molded body according to claim 6, wherein the inorganic fiber molded body forming step, the binder liquid applying step, and the through-air drying step are performed on the same conveying means.