JP5763040B2 - Method for manufacturing ceramic honeycomb structure, and finishing device for ceramic honeycomb dried body - Google Patents

Description

  The present invention relates to a method for manufacturing a ceramic honeycomb structure, and an apparatus for finishing a ceramic honeycomb dried body. More specifically, the present invention relates to a method for manufacturing a ceramic honeycomb structure capable of manufacturing a ceramic honeycomb structure excellent in productivity and having a perpendicularity of an end face. The present invention also relates to a finishing apparatus for a dried ceramic honeycomb body suitably used in the method for manufacturing a ceramic honeycomb structure of the present invention.

  Ceramic honeycomb structures (ceramic honeycomb structures) are used as carriers for catalyst devices used for environmental measures and recovery of specific materials in various fields such as chemistry, electric power, and steel. . Ceramic honeycomb structures are also used as filters for exhaust gas purification. Such a ceramic honeycomb structure is excellent in heat resistance and corrosion resistance, and is employed in various applications as described above. A honeycomb structure is a structure having partition walls that partition and form a plurality of cells extending from one end face to the other end face that serve as a fluid flow path.

  Conventionally, a honeycomb structure having an outer diameter of less than 150 mm is manufactured by the following method. First, a clay containing a forming raw material is formed into a honeycomb shape to obtain a honeycomb formed body. The honeycomb formed body has a cylindrical shape in which a plurality of cells extending from one end face to the other end face are partitioned by partition walls. The honeycomb formed body is cut so that the length in the direction from one end face to the other end face is longer than the length of the finished dimension, and the honeycomb formed body is further dried to obtain a dried honeycomb body. Next, the finished honeycomb dried body is obtained by finishing the length in the direction from one end face to the other end face of the honeycomb dried body so as to be the finished dimension. Next, the finished honeycomb dried body is fired to obtain a honeycomb structure (see, for example, Patent Document 1). In addition, the honeycomb structure manufactured by such a method is inspected whether or not its outer diameter dimension satisfies a reference outer diameter dimension tolerance, and a product that passes the inspection is shipped as a product. Is done.

  On the other hand, when manufacturing a honeycomb structure having an outer diameter of 150 mm or more, a step of separately manufacturing an outer wall may be added (for example, see Patent Document 2). As a step of separately manufacturing the outer wall, for example, after firing the finished honeycomb dried body, the outer periphery of the obtained fired body is ground, and the outer wall is separately manufactured by performing outer periphery coating on the outer peripheral portion that has been ground Can be mentioned. A honeycomb structure having an outer diameter of 150 mm or more is sometimes referred to as a “large-sized honeycomb structure”.

  The above-described manufacturing method for manufacturing a honeycomb structure by drying, finishing, and firing the honeycomb formed body may be hereinafter referred to as “manufacturing method by integral forming”. In addition, a manufacturing method in which a step of separately manufacturing the outer wall is added may be referred to as a “manufacturing method using an outer peripheral coat”. Further, as a method of finishing the end face of the honeycomb structure, a method of correcting the posture of the honeycomb structure and performing the finishing process in this state is disclosed (for example, see Patent Document 3).

JP 2002-046856 A JP-A-3-275309 JP 2006-231475 A

  However, in the conventional method for manufacturing a honeycomb structure, the perpendicularity of one end face and the other end face of the honeycomb structure to be obtained (hereinafter, “the perpendicularity of one end face and the other end face” is simply referred to as “the perpendicularity”. There is a problem that it is insufficient. In particular, in the manufacturing method by integral molding described above, the decrease in the perpendicularity becomes significant. In recent years, the allowable range for the perpendicularity of the honeycomb structure has become strict, and improvement of the perpendicularity of the honeycomb structure is required. The permissible range of perpendicularity means a range that satisfies the standard value of perpendicularity required for a ceramic honeycomb structure as a product. For example, in the processing method described in Patent Document 3, after the honeycomb structure is held by the clamp, the shape of the honeycomb structure is measured, and the posture of the honeycomb structure is corrected to perform the finishing process. . However, since the honeycomb structure has irregularities or the like on its outer wall, the clamp described above may not be stable.

  Further, the manufacturing method using the outer periphery coat has a problem that the manufacturing process is complicated. For example, since a large honeycomb structure has a large distortion or the like of a formed body, a manufacturing method using an outer peripheral coat is mainly used. However, from the viewpoint of reduction in manufacturing cost, etc., it has been studied to manufacture a large honeycomb structure by a manufacturing method using integral molding. However, when a large honeycomb structure is manufactured by a manufacturing method using integral molding, the perpendicularity of the honeycomb structure is more significantly reduced. For these reasons, conventionally, it has been considered extremely difficult to manufacture a large honeycomb structure by a manufacturing method using integral molding.

  The present invention has been made in view of the above-described problems. The present invention provides a method for manufacturing a ceramic honeycomb structure capable of manufacturing a ceramic honeycomb structure having excellent productivity and excellent perpendicularity of the end face. The present invention also provides a finishing apparatus for a dried ceramic honeycomb body, which can efficiently produce a ceramic honeycomb structure having an excellent squareness of end faces.

  According to the present invention, the following method for manufacturing a ceramic honeycomb structure and a finishing apparatus for a dried ceramic honeycomb body are provided.

[1] The length in the direction from the one end face to the other end face of the cylindrical ceramic honeycomb dried body in which a plurality of cells extending from one end face to the other end face are defined by partition walls is defined as a finish dimension. A finishing process to obtain a finished ceramic honeycomb dried body, wherein the finishing process has a first movable cradle and a second movable cradle on the outer wall surface of the ceramic honeycomb dried body. The ceramic honeycomb dried body supported by the receiving portion and the second receiving portion having the third movable receiving stand and the fourth movable receiving stand, and supported on the first receiving portion and the second receiving portion. Each of the excess portions from the finished dimensions at the end on one end surface side and the end on the other end surface side is cut and removed, respectively, and the first movable cradle and the front of the first receiving portion The second movable cradle, and the third movable cradle and the fourth movable cradle of the second receiving part are configured to be movable independently of each other, and the ceramic honeycomb dried body is Before supporting on the first receiving part and the second receiving part, the contour C1 of the portion of the outer wall surface of the dried ceramic honeycomb body supported by the first movable receiving base of the first receiving part. , The contour C2 of the part supported by the second movable cradle of the first receiving part, the contour C3 of the part supported by the third movable cradle of the second receiving part, and the first The contour C4 of the portion of the second receiving portion supported by the fourth movable cradle is measured, and the first distance is set to a distance corresponding to the contour C1, the contour C2, the contour C3, and the contour C4. The first movable cradle of the receiving part, the second movable cradle of the first receiving part, the third movable cradle of the second receiving part, and the fourth movable cradle of the second receiving part, respectively. A method for manufacturing a ceramic honeycomb structure that is independently movable.

[2] The first movable cradle and the second movable cradle of the first receiving part are configured in a reverse C-shape, and the third movable part of the second receiving part. The method for manufacturing a ceramic honeycomb structure according to the above [1], wherein the cradle and the fourth movable cradle are configured in an inverted C shape.

[3] The dried ceramic honeycomb body is placed on a measurement table so that the one end surface is a bottom surface, and the contours C1, C2, C3, and C4 are measured. [1] or [2] A method for manufacturing a ceramic honeycomb structure.

[4] The method for manufacturing a ceramic honeycomb structure according to [3], wherein spacers are arranged in at least three places between the ceramic honeycomb dried body and the measurement table.

[5] The ceramic according to [3] or [4], wherein when the ceramic honeycomb dried body is placed on the measurement table, a difference in inclination of a bottom surface of the ceramic honeycomb dried body with respect to a horizontal plane is 4 mm or less. A method for manufacturing a honeycomb structure.

[6] The method for manufacturing a ceramic honeycomb structure according to any one of [1] to [5], wherein the contours C1, C2, C3, and C4 are measured by a reflective non-contact laser displacement meter.

[7] The ceramic honeycomb structure according to any one of [1] to [6], wherein the temperature of the ceramic honeycomb dried body when measuring the contours C1, C2, C3, and C4 is 20 to 150 ° C. Manufacturing method.

[8] The method for manufacturing a ceramic honeycomb structure according to any one of [1] to [7], wherein the ceramic honeycomb dried body has irregularities on an outer periphery.

[9] The method for manufacturing a ceramic honeycomb structure according to any one of [1] to [8], wherein an outer diameter of the ceramic honeycomb dried body is 100 mm or more.

[10] The method for manufacturing a ceramic honeycomb structure according to any one of [1] to [9], wherein the dried ceramic honeycomb body is made of a forming raw material that is fired to become cordierite.

[11] The length in the direction from the one end surface to the other end surface of the cylindrical ceramic honeycomb dried body in which a plurality of cells extending from one end surface to the other end surface are defined by partition walls is defined as a finish dimension. An apparatus for finishing a ceramic honeycomb dried body for finishing processing so that, when the ceramic honeycomb dried body is placed, from the one end face of the outer wall surface of the ceramic honeycomb dried to the other end face A first receiving part having a first movable cradle and a second movable cradle, and a second movable part having a third movable cradle and a fourth movable cradle, each supporting two points separated in the direction toward each other at two points. An end on the one end face side and an end on the other end face side of the dried ceramic honeycomb body supported by the first receiving section and the second receiving section. Is a processing device for cutting and removing each surplus portion from the finishing dimensions, the first movable cradle, the second movable cradle, the third movable cradle, and the fourth movable cradle, A ceramic honeycomb dried body finishing machine that can move independently.

  According to the method for manufacturing a ceramic honeycomb structure of the present invention, it is possible to manufacture a ceramic honeycomb structure having an excellent squareness of the end face. Moreover, since it is not necessary to perform a complicated process like the manufacturing method by the outer periphery coat mentioned above, it is excellent also in productivity. In particular, according to the method for manufacturing a ceramic honeycomb structure of the present invention, it is possible to manufacture a ceramic honeycomb structure having excellent end face squareness regardless of the circumferential length of the ceramic honeycomb structure.

  According to the ceramic honeycomb dried body finishing apparatus of the present invention, it is possible to efficiently manufacture a ceramic honeycomb structure having excellent squareness of the end face.

1 is a perspective view schematically showing a process of forming a ceramic honeycomb structure in one embodiment of a method for manufacturing a ceramic honeycomb structure of the present invention. It is a side view which shows typically the state which supported the ceramic honeycomb dried body on the 1st receiving part and the 2nd receiving part. It is the top view which looked at FIG. 2A from the one end surface side of the ceramic honeycomb dried body. It is the top view which looked at FIG. 2A from the upper surface side of the ceramic honeycomb dried body. It is a side view which shows typically an example of the finishing process in a finishing process. It is a side view which shows typically the state which moved the 1st-4th movable cradle of the 1st receiving part and the 2nd receiving part. It is the top view which looked at FIG. 3A from the one end surface side of the ceramic honeycomb dried body. It is a perspective view which shows typically an example of the measuring method of the contour in a finishing process. It is a graph which shows an example of the result of having measured a contour. It is a side view which shows the state before fixing a ceramic honeycomb dried body with a fixing jig. It is sectional drawing which shows the A-A 'cross section of FIG. 6A. It is a schematic diagram for explaining the perpendicularity, and is a side view of the ceramic honeycomb structure viewed from the side. It is a schematic diagram for demonstrating the method to move the 1st movable cradle and 2nd movable cradle of a 1st receiving part to a perpendicular direction.

  Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiments, and it is understood that design changes, improvements, and the like can be added as appropriate based on the ordinary knowledge of those skilled in the art without departing from the spirit of the present invention. Should.

(1) Manufacturing method of ceramic honeycomb structure:
One embodiment of a method for manufacturing a ceramic honeycomb structure of the present invention is a method for manufacturing a ceramic honeycomb structure including a finishing step A as shown in FIG. FIG. 1 is a perspective view schematically showing a process of forming a ceramic honeycomb structure in one embodiment of a method for manufacturing a ceramic honeycomb structure of the present invention. The finishing step A is a step of finishing the one end surface 61 and the other end surface 62 of the cylindrical ceramic honeycomb dried body 50 having one end surface 61 and the other end surface 62 to obtain a finished ceramic honeycomb dried body 70. is there. The dried ceramic honeycomb body 50 has a cylindrical shape in which a plurality of cells 52 extending from one end face 61 to the other end face 62 are partitioned by partition walls 51. In addition, the manufacturing method of the ceramic honeycomb structure of the present embodiment may further include the following firing step B. The firing step B is a step in which the finished ceramic honeycomb dried body 70 obtained in the finishing step A is fired to obtain the ceramic honeycomb structure 100. Hereinafter, the ceramic honeycomb dried body 50 may be simply referred to as “honeycomb dried body 50”. The finished ceramic honeycomb dried body 70 may be simply referred to as “finished honeycomb dried body 70”. The ceramic honeycomb structure 100 may be simply referred to as “honeycomb structure 100”.

  In the method for manufacturing the ceramic honeycomb structure of the present embodiment, the finishing step A is performed by a method as shown in FIGS. 2A to 2D, for example. Here, FIG. 2A is a side view schematically showing a state in which the dried ceramic honeycomb body is supported on the first receiving portion and the second receiving portion. FIG. 2B is a plan view of FIG. 2A viewed from one end face side of the ceramic honeycomb dried body. FIG. 2C is a plan view of FIG. 2A viewed from the upper surface side of the dried ceramic honeycomb body. FIG. 2D is a side view schematically showing an example of finishing in the finishing process.

  In the finishing step A, the ceramic honeycomb dried body 50 supported on the first receiving portion 69a and the second receiving portion 69b has an end portion on one end surface 61 side and an end portion on the other end surface 62 side from the finishing dimension m. Each surplus portion 50a, 50b is cut and removed. The 1st receiving part 69a has the 1st movable receiving stand 68a and the 2nd movable receiving stand 68b which were provided in the state inclined in the shape of a reverse C, for example. In addition, the second receiving portion 69b includes, for example, a third movable receiving stand 68c and a fourth movable receiving stand 68d provided in a state of being inclined in an inverted C shape. The surface of the outer wall 63 of the ceramic honeycomb dried body 50 is supported by the first movable receiver 68a, the second movable receiver 68b, the third movable receiver 68c, and the fourth movable receiver 68d. As described above, the method for manufacturing the ceramic honeycomb structure according to the present embodiment includes a finishing process including the first movable cradle 68a, the second movable cradle 68b, the third movable cradle 68c, and the fourth movable cradle 68d. A finishing process is performed using the apparatus 300. The first movable receiving stand 68a and the second movable receiving stand 68b of the first receiving portion 69a, and the third movable receiving stand 68c and the fourth movable receiving stand 68d of the second receiving portion 69b are movable independently of each other. It is composed of. 2A to 2D show an example in which the first movable receiving base 68a and the second movable receiving base 68b are provided in a state of being inclined in an inverted C shape. As long as the base 68a and the second movable receiving base 68b are configured to be movable independently of each other, the base 68a and the second movable base 68b are not limited to those provided in a state of being inclined in a reverse C shape. Further, the third movable cradle 68c and the fourth movable cradle 68d are not limited to those provided in a state of being inclined in an inverted C shape. In the following embodiments, the first movable cradle 68a and the second movable cradle 68b are formed in an inverted C shape, and the third movable cradle 68c and the fourth movable cradle An example in which 68d is formed in an inverted C shape will be described.

  As shown in FIGS. 3A and 3B, the first movable receiver 68a and the second movable receiver 68b of the first receiver 69a, and the third movable receiver 68c and the fourth movable receiver 68d of the second receiver 69b. For example, those configured to be movable in the vertical direction independently of each other can be cited. In the movable direction (vertical direction) of the arrow U shown in FIGS. 3A and 3B, the first movable receiving stand 68a, the second movable receiving stand 68b, the third movable receiving stand 68c, and the fourth movable receiving stand 68d are mutually connected. It can move independently. FIG. 3A is a side view schematically showing a state in which the first to fourth movable cradles of the first receiving part and the second receiving part are moved, and FIG. 3B is a side view of FIG. It is the top view seen from the end surface side.

  In the method for manufacturing the ceramic honeycomb structure of the present embodiment, the following measurement is performed before the ceramic honeycomb dried body 50 is supported on the first receiving portion 69a and the second receiving portion 69b. Based on the measurement result, each of the first movable receiving stand 68a, the second movable receiving stand 68b, the third movable receiving stand 68c, and the fourth movable receiving stand 68d is moved in the vertical direction, for example. A finishing process that achieves a good angle is realized.

  Specifically, as shown in FIG. 4, the contour C1, the contour C2, the contour C3, and the contour C4 on the surface of the outer wall 63 of the ceramic honeycomb dried body 50 are measured. “Contour C1” is the contour of the portion P1 supported by the first movable receiving base 68a (see FIGS. 2A to 2C) of the first receiving portion 69a on the surface of the outer wall 63 of the ceramic honeycomb dried body 50. is there. Similarly, the “contour C2” is a contour of the portion P2 supported by the second movable cradle 68b (see FIGS. 2A to 2C) of the first receiving portion 69a. “Contour C3” is the contour of the portion P3 supported by the third movable cradle 68c (see FIGS. 2A to 2C) of the second receiving portion 69b. “Contour C4” refers to the contour of the portion P4 supported by the fourth movable receiving base 68d (see FIGS. 2A to 2C) of the second receiving portion 69b. Here, FIG. 4 is a perspective view schematically showing an example of the contour measuring method in the finishing process. FIG. 4 shows an example in which the dried ceramic honeycomb body 50 is placed on a measurement table 65 on which a measurement object can be placed horizontally and the contour is measured. Further, in FIG. 4, the dried ceramic honeycomb body 50 placed on the measuring table 65 is rotated in the rotation direction indicated by reference numeral 80 to measure the contour.

  Here, FIG. 5 shows an example of the measurement result of the contour that goes around the circumferential direction of the surface of the outer wall 63 of the ceramic honeycomb dried body 50. In FIG. 5, the measurement result of the contour of the perimeter of the circumferential direction including the part supported by the 1st receiving part and the contour of the perimeter of the circumferential direction including the part supported by the second receiving part is shown. As can be seen from the measurement results shown in FIG. 5, the ceramic honeycomb dried body 50 has a deformed outer peripheral shape or a bend in a direction from one end surface 61 toward the other end surface 62. That is, the contour that goes around the circumferential direction of the surface of the outer wall 63 of the ceramic honeycomb dried body 50 is not constant. If such a ceramic honeycomb dried body 50 is placed without moving the cradle, it is considered that the ceramic honeycomb dried body 50 moves on the cradle. That is, if the outer peripheral shape of the ceramic honeycomb dried body 50 is deformed, the ceramic honeycomb dried body 50 cannot be placed on the cradle in a stable state, and the ceramic honeycomb dried body 50 may move and tilt.

  For example, when finishing the ceramic honeycomb dried body 50, as shown in FIGS. 2A to 2C, the ceramic honeycomb dried body 50 supported on the first receiving portion 69a and the second receiving portion 69b is fixed. It is fixed with a jig 76. As shown in FIGS. 6A and 6B, the fixing jig 76 includes an arc-shaped fixed portion 76a corresponding to the outer peripheral shape of the ceramic honeycomb dried body 50, and a vertical movable portion 76b for moving the fixed portion 76a up and down. ,have. In a state where the ceramic honeycomb dried body 50 is supported on the first receiving portion 69a and the second receiving portion 69b, the arc-shaped fixed portion 76a is pulled down by the up and down movable portion 76b, and the ceramic honeycomb dried body 50 is pulled down. Is fixed. As described above, the contour that goes around the circumferential direction of the surface of the outer wall 63 of the ceramic honeycomb dried body 50 is not constant. That is, there is a difference in the contour that goes around the circumferential direction. Therefore, when the ceramic honeycomb dried body 50 is fixed by such a fixing jig 76, it is considered that the ceramic honeycomb dried body 50 moves on the cradle. For this reason, if the dried ceramic honeycomb body is cut without moving the cradle in the state where there is a difference in the contours as in the conventional manufacturing method in which finishing is performed with a non-movable cradle, the obtained ceramic honeycomb structure is directly There was a problem that the angle deteriorated. Here, FIG. 6A is a side view showing a state before the dried ceramic honeycomb body is fixed by a fixing jig. 6B is a cross-sectional view showing the A-A ′ cross section of FIG. 6A. Note that a protective cover for protecting the ceramic honeycomb dried body 50 is preferably disposed on the arc-shaped fixing portion 76a. In addition, it is preferable that an elastic member such as a spring is disposed at a connection portion between the fixed portion 76a and the vertically movable portion 76b.

  In addition, since the value of the contour of the ceramic honeycomb dried body is different for each ceramic honeycomb dried body, finishing processing so that the squareness is good for all the ceramic honeycomb dried bodies to be manufactured, It was considered extremely difficult. In the conventional manufacturing method, after the ceramic honeycomb structure is manufactured, the perpendicularity and the like are inspected, and those that do not satisfy the reference value are disposed of such as disposal.

  In the method for manufacturing the ceramic honeycomb structure of the present embodiment, from the measurement results of the contours C1, C2, C3, and C4, as shown in FIGS. 2A to 2D, the first movable cradle 68a and the second movable cradle 68b. By moving each of the third movable cradle 68c and the fourth movable cradle 68d, a finishing process with a good squareness is realized. Specifically, the first movable receiving stand 68a of the first receiving portion 69a is moved by a distance corresponding to the contour C1. Further, the second movable receiving base 68b of the first receiving portion 69a is moved by a distance corresponding to the contour C2. Further, the third movable receiving stand 68c of the second receiving portion 69b is moved by a distance corresponding to the contour C3. Further, the fourth movable receiving base 68d of the second receiving portion 69b is moved by a distance corresponding to the contour C4. As described above, the first movable cradle 68a, the second movable cradle 68b, the third movable cradle 68c, and the fourth movable cradle 68d are each complemented by the difference between the contours C1, C2, C3, and C4. By making it move so as to cancel (cancel), it is possible to perform finishing processing with a better squareness. Thus, in the method for manufacturing the ceramic honeycomb structure of the present embodiment, the first movable cradle 68a, the second movable cradle 68b, the first movable cradle 68b, the second movable cradle 68b, Finishing is performed by adjusting the heights of the three movable cradle 68c and the fourth movable cradle 68d. For this reason, even if the ceramic honeycomb structure has a large outer diameter, the perpendicularity is excellent. The large ceramic honeycomb structure has a large variation in the contours of the dried ceramic honeycomb body, and thus the perpendicularity may be significantly deteriorated when finishing processing as in the conventional manufacturing method is performed. In addition, the method for manufacturing the ceramic honeycomb structure according to the present embodiment does not require a complicated process as in the manufacturing method using the outer peripheral coat, and thus is excellent in productivity.

  “Contour” means the magnitude of the actual contour deviation from the geometric contour defined by the theoretically exact dimensions. Therefore, the contour measured in the method for manufacturing the ceramic honeycomb structure of the present embodiment is the deviation of the ceramic honeycomb dried body from the standard outer diameter dimension (the dimension corresponding to “0” on the vertical axis in FIG. 5). It will be a size. By measuring such a contour, the variation of the line elements constituting the curved surface can be defined in a two-dimensional planar tolerance range. That is, the variation of the line elements constituting the outer peripheral surface of the ceramic honeycomb dried body can be defined by a two-dimensional planar tolerance region.

  The “squareness” will be described with reference to FIG. FIG. 7 is a schematic diagram for explaining the perpendicularity, and is a side view of the ceramic honeycomb structure 200 as viewed from the side. When obtaining the perpendicularity of the ceramic honeycomb structure 200, first, an imaginary line 115 perpendicular to the one end face 111 is drawn from any one point 111 a on the periphery of the one end face 111 of the ceramic honeycomb structure 200. An intersection 118 between the virtual line 115 and the virtual surface 116 of the other end surface 112 is obtained. Then, a length Y1 connecting the intersection point 118 and the end point 112a on the periphery of the other end surface 112 is obtained. The “length Y1” is the squareness of any one point. The squareness of the ceramic honeycomb structure 200 is the maximum value obtained by measuring the “length Y1” over the entire circumference.

  The “finished dimension of the dried ceramic honeycomb body” refers to a length from one end face to the other end face required for the finished ceramic honeycomb dried body. About the length from one end face to the other end face required for the finished ceramic honeycomb dried body, from the standard length from one end face to the other end face of the ceramic honeycomb structure that is the final product, It is determined appropriately in consideration of the amount of shrinkage and the like.

  Hereinafter, the manufacturing method of the ceramic honeycomb structure of the present embodiment will be described in more detail.

(1-1) Production of dried ceramic honeycomb body:
First, a method for producing a ceramic honeycomb dried body used in the method for producing a ceramic honeycomb structure of the present embodiment will be described. The manufacturing method of the ceramic honeycomb dried body is not limited to the following manufacturing method. That is, if the length of the ceramic honeycomb dried body from one end surface to the other end surface is before being finished so as to be the finished dimension, the manufacturing method and the like are not particularly limited. Absent.

  As a method for producing the dried ceramic honeycomb body, a general extrusion molding method is used. For example, there can be mentioned an intermittent forming (ram forming) method in which a forming raw material containing a ceramic material and a forming aid is kneaded and a clay is formed by a vacuum clay kneader or the like. As another method, a continuous molding method in which the mixed powder is directly ground and molded can be exemplified. There is no restriction | limiting in particular as a ceramic material contained in a shaping | molding raw material, The ceramic material used as a shaping | molding raw material can be used in the manufacturing method of a conventionally well-known ceramic honeycomb structure. For example, examples of the ceramic material include cordierite, a cordierite-forming raw material, silicon carbide, and alumina. The cordierite forming raw material is a ceramic raw material blended so as to have a chemical composition that falls within the range of 42 to 56% by mass of silica, 30 to 45% by mass of alumina, and 12 to 16% by mass of magnesia. The cordierite forming raw material is fired to become cordierite.

  Further, the forming raw material contains water as a dispersion medium. Furthermore, the forming raw material may contain a pore former, a binder, a dispersing agent, a surfactant, and the like, if necessary. As the pore former, the binder, the dispersant, the surfactant, and the like, those used in a conventionally known method for manufacturing a ceramic honeycomb structure can be suitably used.

  Next, for example, by extrusion molding, a cylindrical honeycomb molded body is formed in which a plurality of cells extending from one end face to the other end face are partitioned by partition walls. Examples of the molding method include intermittent extrusion molding or continuous extrusion molding. In extrusion molding, a die having a desired overall shape, cell shape, partition wall thickness, cell density and the like is used.

  Next, the obtained honeycomb formed body is cut so as to be orthogonal to the cell extending direction of the honeycomb formed body. When the honeycomb formed body is cut, the length in the direction from one end face to the other end face of each cut honeycomb formed body is set to be longer than the finished dimension of the honeycomb structure. A portion longer than the finished dimension of each honeycomb formed body is cut and removed in the finishing process.

  Next, the cut honeycomb formed body is dried to obtain a honeycomb dried body. The drying method is not particularly limited, and examples thereof include hot air drying, microwave drying, dielectric drying, reduced pressure drying, vacuum drying, and freeze drying. Among them, it is preferable to perform dielectric drying, microwave drying, or hot air drying alone or in combination.

(1-2) Finishing process:
Next, as shown in FIGS. 1, 2 </ b> A to 2 </ b> D, 3 </ b> A to 3 </ b> B, and FIG. 4, one end surface 61 and the other end surface 62 of the dried ceramic honeycomb body 50 are finished to finish the finished ceramic honeycomb. A dry body 70 is obtained. By this finishing process A, the length from one end face 61 to the other end face 62 of the ceramic honeycomb dried body 50 is processed so as to be the finished dimension m. At this time, as described above, the contours C1, C2, C3, and C4 are measured, and from the measurement results, the first movable cradle 68a, the second movable cradle 68b, the third movable cradle 68c, And the finishing is performed by adjusting the height of the fourth movable cradle 68d.

  There is no particular limitation on the method for measuring the contour. For example, as shown in FIG. 4, the contour can be measured by a laser displacement meter 67. As the laser displacement meter 67, a reflective non-contact laser displacement meter can be suitably used. Such a laser displacement meter can more accurately measure the contour of the dried ceramic honeycomb body 50.

  When measuring the contour of the dried ceramic honeycomb body 50, the contour C1 of the part P1 supported by the first movable cradle, the contour C2 of the part P2 supported by the second movable cradle, and the third movable receiver The contour C3 of the part P3 supported by the base and the contour C4 of the part P4 supported by the fourth movable cradle are measured. However, as shown in FIG. 4, the contour is measured over the entire circumference (ie, the first measurement portion Q1) including the portions supported by the first movable cradle and the second movable cradle. Also good. Similarly, the contour may be measured over the entire circumference (that is, the second measurement portion Q2) including the portion supported by the third movable cradle and the fourth movable cradle. For example, for the first measurement portion Q1, a plurality of first measurement portions Q1 are shifted from the contour measurement start point P01 to the entire circumference including the contour measurement start point P01 while shifting the measurement position in the circumferential direction. The contour is measured at the measurement point. Similarly, with respect to the second measurement portion Q2, a plurality of second measurement portions Q2 are shifted from the contour measurement start point P02 to the circumferential direction including the contour measurement start point P02 while shifting the measurement position in the circumferential direction. The contour is measured at the measurement points.

  Although there is no restriction | limiting in particular about the temperature of the ceramic honeycomb dried body at the time of a contour measurement, It is preferable that the temperature of a ceramic honeycomb dried body is 20-150 degreeC. The temperature of the ceramic honeycomb dried body is more preferably room temperature if possible. The dried ceramic honeycomb body after drying the ceramic honeycomb formed body has a temperature of about 50 to 150 ° C., and the contour can be measured after the ceramic honeycomb dried body is once cooled to room temperature. However, if it cools to room temperature, thermal efficiency and work efficiency will worsen. On the other hand, if the dried ceramic honeycomb body after drying the ceramic honeycomb formed body can be quickly subjected to contour measurement, the working efficiency can be further improved. In the measurement of the contour, it is preferable to perform temperature correction on the measurement result. When temperature correction is performed, the “standard outer diameter size” of the ceramic honeycomb molded body is measured in advance, and the thermal expansion coefficient of the ceramic material and the molding aid is measured in advance to obtain the “standard outer diameter size corresponding to the temperature”. to correct.

  As shown in FIG. 4, the measurement of the contour is preferably performed by placing the ceramic honeycomb dried body 50 on a measurement table 65 on which a measurement object can be placed horizontally. When such a measuring table 65 is used, the contours C1, C2, C3, and C4 of the parts supported by the first movable receiving table, the second movable receiving table, the third movable receiving table, and the fourth movable receiving table are obtained. It can be easily measured. For example, when the laser displacement meter 67 is fixed, it is preferable to arrange two laser displacement meters 67 and simultaneously measure the contours of the first measurement portion Q1 and the second measurement portion Q2 described above. The contour of the first measurement portion Q1 and the second measurement portion Q2 can be continuously measured by rotating the measurement table 65 on which the ceramic honeycomb dried body 50 is placed once in a horizontal plane. The laser displacement meter 67 may be a movable type. Moreover, it is preferable to arrange a spacer 66 between the measurement table 65 and one end face 61 of the ceramic honeycomb dried body 50. In the ceramic honeycomb dried body 50, the flatness of one end surface 61 is deteriorated due to the cutting and drying process at the time of molding, and when the measurement table 65 rotates, the honeycomb dried body 50 may move by centrifugal force. is there. In order to ensure the measurement accuracy of the contour, it is preferable to arrange three spacers 66.

  Even if the direction L from the one end surface 61 of the ceramic honeycomb dried body 50 placed on the measuring table 65 toward the other end surface 62 is slightly inclined from the vertical direction, the influence on the value of the contour is extremely small. Therefore, even if the bottom surface of the ceramic honeycomb dried body 50 placed on the measurement table 65 is inclined with respect to the surface of the measurement table 65, the influence of the inclination of the bottom surface is extremely small. That is, when the ceramic honeycomb dried body 50 is placed on the measurement table 65, the end surface of the ceramic honeycomb dried body 50 may be slightly inclined with respect to the horizontal plane. However, it is assumed that the ceramic honeycomb dried body 50 does not move while the measuring table 65 is rotating. When the ceramic honeycomb dried body 50 is placed on the measuring table 65, the difference in inclination of the bottom surface of the ceramic honeycomb dried body 50 with respect to the horizontal plane is preferably 4 mm or less. Here, the “difference in the inclination of the bottom surface” is a distance at which the difference in the distance between the bottom surface of the dried honeycomb body 50 and the surface of the measuring table 65 is the largest. It is assumed that the dried honeycomb body 50 is disposed on the measurement table 65 such that “the direction L from the one end surface 61 toward the other end surface 62” is directed in the vertical direction.

  Next, as shown in FIGS. 2A to 2C, 3A, and 3B, the first movable receiving stand 68a of the first receiving portion 69a is moved by a distance corresponding to the contour C1. Further, the second movable receiving base 68b of the first receiving portion 69a is moved by a distance corresponding to the contour C2. Further, the third movable receiving stand 68c of the second receiving portion 69b is moved by a distance corresponding to the contour C3. Further, the fourth movable receiving base 68d of the second receiving portion 69b is moved by a distance corresponding to the contour C4. Then, the dried ceramic honeycomb body 50 is chucked by the transport chuck and transported to the first movable receiver 68a, the second movable receiver 68b, the third movable receiver 68c, and the fourth movable receiver 68d. In this way, the measurement location of the contour C1 is supported by the first movable cradle 68a, the measurement location of the contour C2 is supported by the second movable cradle 68b, and the measurement location of the contour C3 is supported by the third movable cradle 68a. The measurement point of the contour C4 is supported by the base 68c, and is supported by the fourth movable receiving base 68d.

  Here, the case where the contour measurement result is shown in FIG. 5 will be described in more detail. In FIG. 5, the horizontal axis indicates the contour measurement angle (°), and the vertical axis indicates the contour (mm). The contour measurement angle (°) on the horizontal axis is the measurement point of each contour when the contour measurement start point (P01, P02) is 0 ° and the outer wall surface of the dried ceramic honeycomb body is 360 °. The angle at. In the example shown in FIG. 5, the part with the contour measurement angle of 45 ° is supported by the first movable cradle 68a and the third movable cradle 68c, and the part with the contour measurement angle of 135 ° is the second movable cradle 68b. And the fourth movable cradle 68d. That is, the angles of the first movable receiving stand 68a and the second movable receiving stand 68b inclined in a reverse C shape, and the angles of the third movable receiving stand 68c and the fourth movable receiving stand 68d inclined in a reverse C shape. However, in the above example, it is 90 ° (= 135 ° -45 °). In FIG. 5, the contour C1 is 1.4 mm, the contour C2 is −0.2 mm, the contour C3 is −0.8 mm, and the contour C4 is 0.8 mm.

  Here, in the schematic diagram shown in FIG. 8, the first movable receiving base 68a of the first receiving portion 69a is moved by a distance corresponding to the contour C1, and the first receiving portion is moved by a distance corresponding to the contour C2. An example in which the second movable cradle 68b of 69a is moved will be described. FIG. 8 is a schematic diagram for explaining a method of moving the first movable receiver 68a and the second movable receiver 68b of the first receiver 69a in the vertical direction. In the following example, the contour C1 is a positive value and the contour C2 is a negative value. First, when the first movable cradle 68a is moved in the vertical direction, the first movable cradle 68a is lowered by the distance of the vertical component of the contour C1 ("vertical distance correction" in FIG. 8). In the example shown in FIG. 8, the movable distance of the first movable cradle 68a in the vertical distance correction is “−Contour C1 × (1 / √2)”. Further, the first movable cradle 68a is lowered so as to correct the displacement of the contact point between the first movable cradle 68a and the ceramic honeycomb dried body 50 (hereinafter referred to as “shift correction”) (“first” in FIG. 8). Correction of displacement of the contact between the movable cradle and the dried ceramic honeycomb ”). In the example shown in FIG. 8, the movable distance for deviation correction is “−Contour C1 × (1 / √2)”. Therefore, the total movable distance of the first movable cradle 68a is “−Contour C1 × (1 / √2) × 2”. In this case, the receiving position of the first movable cradle 68a in FIG. 8 is a position moved by “−Contour C1 × (1 / √2) × 2” from the reference distance. The reference distance is, for example, the height of the ball screw 71a from the cradle reference plane shown in FIG. Although not shown, the heights of the ball screws of the first movable receiving stand 68a, the second movable receiving stand 68b, the third movable receiving stand 68c, and the fourth movable receiving stand 68d are the same. Accordingly, the distance correction corresponding to the contour C1 can be performed by moving the cradle 68a from the reference distance by the total movable distance in this way.

  As shown in FIG. 8, when moving the second movable cradle 68b in the vertical direction, first, the second movable cradle 68b is raised by the distance of the vertical component of the contour C2 (in FIG. 8). "Vertical distance correction"). In the example illustrated in FIG. 8, the movable distance of the second movable cradle 68b in the vertical distance correction is “+ contour C2 × (1 / √2)”. Further, the second movable cradle 68b is raised so as to correct the displacement of the contact point between the second movable cradle 68b and the ceramic honeycomb dried body 50 ("Second movable cradle and ceramic honeycomb dried body in FIG. 8" Correction of contact misalignment "). In the example shown in FIG. 8, the movable distance for deviation correction is “+ contour C2 × (1 / √2)”. Accordingly, the total movable distance of the second movable cradle 68b is “+ contour C1 × (1 / √2) × 2”. The receiving position of the second movable cradle 68b is a position moved “Contour C2 × (1 / √2) × 2” from the reference distance. Although not shown, the third movable cradle and the fourth movable cradle are also moved so as to complement (cancel) the contours C3 and C4. Moreover, although the example in the case where the contours C1, C2, C3, and C4 are complemented by the movement in the vertical direction has been described in the above-described example, for example, although illustration is omitted, the first movable receiver and the second movable receiver As long as the difference between the contours C1, C2, C3, and C4 can be complemented by the movement of the base, the third movable base, and the fourth movable base, each movable base can be moved in a direction other than the vertical direction. It may be movable.

  As shown in FIGS. 2A to 2C, the first movable receiver 68a, the second movable receiver 68b, the third movable receiver 68c, and the fourth movable receiver 68d are, for example, ball screws 71a, 71b, 71c, 71d. Can be moved up and down by motors 72a, 72b, 72c and 72d. Regarding the method of moving the first movable receiving stand 68a, the second movable receiving stand 68b, the third movable receiving stand 68c, and the fourth movable receiving stand 68d, the above-described ball screws 71a, 71b, 71c, 71d, and motors 72a, 72b. , 72c, 72d.

  Next, in a state where the outer wall 63 of the ceramic honeycomb dried body 50 is supported by the first movable cradle 68a, the second movable cradle 68b, the third movable cradle 68c, and the fourth movable cradle 68d, FIG. Finish as shown. Cutting tools 75a and 75b for performing finishing are arranged so as to be perpendicular to the horizontal plane. The finishing process can be performed by cutting the surplus portion 50a on the one end face 61 side and the surplus portion 50b on the other end face 62 side of the ceramic honeycomb dried body 50 with the cutting tools 75a and 75b. Examples of the cutting tools 75a and 75b include a grindstone.

  As described above, a finished ceramic honeycomb dried body having an excellent perpendicularity can be obtained. In the method for manufacturing a ceramic honeycomb structure of the present embodiment, the perpendicularity of the finished ceramic honeycomb dried body to be obtained can be improved regardless of the outer diameter of the ceramic honeycomb dried body. For this reason, the method for manufacturing a ceramic honeycomb structure of the present embodiment is suitable when the outer diameter of the ceramic honeycomb dried body is 100 mm or more, and the outer diameter of the ceramic honeycomb dried body is 150 mm or more. More preferred in some cases. A ceramic honeycomb dried body having an outer diameter size of 100 mm or more has a large contour on the outer wall surface, and the perpendicularity is remarkably lowered in the finishing process in the conventional manufacturing method. Further, the method for manufacturing the ceramic honeycomb structure of the present embodiment is more suitable when the one-side dimensional difference of the outer diameter dimensional tolerance of the ceramic honeycomb dried body is larger than the squareness. That is, even if the allowable range for the perpendicularity is stricter, according to the method for manufacturing the ceramic honeycomb structure of the present embodiment, a good perpendicularity can be realized. The outer diameter dimension tolerance is a product standard of the outer diameter dimension, and is a difference between the maximum dimension and the minimum dimension of an error allowed in each manufacturing stage.

  In the method for manufacturing the ceramic honeycomb structure of the present embodiment, the shape measurement of the dried ceramic honeycomb body can also be performed based on the measurement results of the contour described so far. That is, at the time of measuring the contour, the contour is measured over the entire circumference in the circumferential direction of the outer wall surface of the ceramic honeycomb dried body, and from the measurement result, the outer peripheral shape of the ceramic honeycomb dried body satisfies the specified condition. It can be determined whether or not. For example, when the maximum value and the minimum value of the contour measured over the entire circumference in the circumferential direction are within a specified numerical range, it is determined that “the specified condition is satisfied”. When the maximum value and the minimum value of the contour measured over the entire circumference in the circumferential direction are outside the specified numerical range, it is determined that “the specified condition is not satisfied”. The ceramic honeycomb dried body that does not satisfy the prescribed conditions may not be finished. For example, for a dried ceramic honeycomb body in which the difference between the maximum value and the minimum value of the contour is too large, even if finishing is performed to improve the squareness, the tolerance of squareness is satisfied. There may not be.

  By measuring the shape of the dried ceramic honeycomb as described above, finish processing of the end face with excellent squareness is performed, and the dried ceramic honeycomb body whose outer peripheral shape does not satisfy the specified conditions is removed before finishing. Can do. A ceramic honeycomb dried body whose outer peripheral shape does not satisfy the prescribed conditions is judged to be defective by the final inspection. Therefore, by removing such a ceramic honeycomb dried body before finishing processing, unnecessary finishing processes and firing are performed. The process and the inspection process can be omitted. In the shape measurement described above, for example, the contour may be measured by the following method. First, contour measurement start points are provided at three positions in the direction L from one end surface to the other end surface, and the contours are measured from the three contour measurement start points over the entire circumference in the circumferential direction including each contour measurement start point. Measure. Then, based on the measurement results of the contours measured over these three circumferential directions, it is determined whether or not the outer peripheral shape of the ceramic honeycomb dried body satisfies the specified condition. By configuring in this way, more accurate shape measurement can be performed.

(1-3) Firing step:
In the method for manufacturing a ceramic honeycomb structure of the present embodiment, the finished ceramic honeycomb dried body obtained in this way is fired to obtain a ceramic honeycomb structure. Thereby, a ceramic honeycomb structure in which a good squareness of the end face of the finished ceramic honeycomb dried body is reflected can be obtained.

  When firing is performed, first, degreasing is performed in order to remove the molding aid and the like, and then the temperature is further raised and main firing is performed to form a ceramic honeycomb structure. There are no particular restrictions on the degreasing and firing conditions. It is preferable to perform degreasing and main firing under conditions suitable for the forming raw material of the ceramic honeycomb dried body. For example, the degreasing is preferably performed according to the type of organic substance that is a molding aid or the like in the molding raw material and the amount added. As said organic substance, an organic binder, a dispersing agent, a pore making material etc. can be mentioned. Since the firing conditions (temperature and time) vary depending on the type of the forming raw material, an appropriate condition may be selected according to the type. For example, the firing temperature is generally about 1400 to 1600 ° C., but is not limited thereto. Degreasing and main baking may be separate steps. Degreasing and main baking can be performed using an electric furnace, a gas furnace, or the like.

(2) Finishing device for ceramic honeycomb dried body:
Next, an embodiment of the finishing device for the dried ceramic honeycomb body of the present invention will be described. The finishing device for the dried ceramic honeycomb body of the present embodiment is a finishing device used in the method for manufacturing a ceramic honeycomb structure of the present invention described so far. Hereinafter, the finishing device for the dried ceramic honeycomb body of the present embodiment may be simply referred to as “finishing device”.

  The finishing device of the present embodiment is a finishing device for finishing the length in the direction from one end surface to the other end surface of the cylindrical ceramic honeycomb dried body so as to have a finishing dimension. The dried ceramic honeycomb body is formed by partitioning a plurality of cells extending from one end face to the other end face.

  As shown in FIGS. 2A to 2D, the finishing apparatus 300 according to the present embodiment has two portions separated in a direction from one end surface 61 to the other end surface 62 of the outer wall 63 surface of the ceramic honeycomb dried body 50. A first receiving portion 69a and a second receiving portion 69b that are supported at points are provided. That is, the first receiving portion 69a has a first movable receiving stand 68a and a second movable receiving stand 68b, and when the ceramic honeycomb dried body 50 is placed, the surface of the outer wall 63 of the ceramic honeycomb dried body 50 is two points. Support with. The second receiving portion 69b includes a third movable receiving stand 68c and a fourth movable receiving stand 68d. When the ceramic honeycomb dried body 50 is placed, two points on the surface of the outer wall 63 of the ceramic honeycomb dried body 50 are provided. Support with.

  The finishing apparatus 300 has a finishing dimension m at the end on one end face 61 side and the end on the other end face 62 side of the dried ceramic honeycomb body 50 supported on the first receiving portion 69a and the second receiving portion 69b. It is a processing apparatus which cuts and removes each excess part 50a, 50b from each. Examples of the cutting tools 75a and 75b for cutting the surplus portions 50a and 50b include a grindstone.

  As described in the method for manufacturing the ceramic honeycomb structure of the present embodiment, the finishing apparatus 300 of the present embodiment includes the first movable cradle 68a, the second movable cradle 68b, the third movable cradle 68c, and The fourth movable cradle 68d is configured to be independently movable. Although there is no restriction | limiting in particular about a movable mechanism, The movable mechanism which moves up and down ball screw 71a, 71b, 71c, 71d by motor 72a, 72b, 72c, 72d can be mentioned.

  In addition, the first movable cradle 68a, the second movable cradle 68b, the third movable cradle 68c, and the fourth movable cradle 68d can be moved by the method described in the method for manufacturing the ceramic honeycomb structure of the present embodiment. Is preferably performed based on That is, the contour C1, contour C2, contour C3, and contour C4 on the surface of the outer wall 63 of the ceramic honeycomb dried body 50 are measured by the method shown in FIG. The contour C1 is a contour of the portion P1 supported by the first movable cradle 68a (see FIGS. 2A to 2C). The contour C2 is a contour of the portion P2 supported by the second movable cradle 68b (see FIGS. 2A to 2C). The contour C3 is a contour of the portion P3 supported by the third movable cradle 68c (see FIGS. 2A to 2C). The contour C4 is a contour of the portion P4 supported by the fourth movable cradle 68d (see FIGS. 2A to 2C). Next, as shown in FIGS. 2A to 2D, the first movable receiving base 68a of the first receiving portion 69a is moved by a distance corresponding to the contour C1. Further, the second movable receiving base 68b of the first receiving portion 69a is moved by a distance corresponding to the contour C2. Further, the third movable receiving stand 68c of the second receiving portion 69b is moved by a distance corresponding to the contour C3. Further, the fourth movable receiving base 68d of the second receiving portion 69b is moved by a distance corresponding to the contour C4. As a result, the variation in contours is canceled at the time of finishing, and a more square finish is possible.

  By firing the finished ceramic honeycomb dried body finished by the finishing apparatus 300 of the present embodiment by the firing step, a ceramic honeycomb structure having an excellent perpendicularity of the end face can be manufactured. According to the finishing apparatus 300 of the present embodiment, the perpendicularity of the end face of the finished ceramic honeycomb dried body to be obtained can be improved regardless of the length of the circumferential length of the ceramic honeycomb dried body. For this reason, the finishing apparatus 300 of this embodiment is suitable as a finishing apparatus for a ceramic honeycomb dried body having an outer diameter of 100 mm or more, and a finishing apparatus for a ceramic honeycomb dried body having an outer diameter of 150 mm or more. Is more preferable.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

Example 1
First, a dried ceramic honeycomb body for performing the finishing process was prepared. In order to produce a ceramic honeycomb dried body, a cordierite forming raw material was used as a ceramic raw material. A predetermined amount of a molding aid was added to the cordierite forming raw material, and water was added to prepare a mixed powder.

  Next, the obtained mixed powder was extruded using a mold for forming a ceramic honeycomb formed body. Extrusion molding was performed by continuous molding to produce a cylindrical ceramic honeycomb molded body in which a plurality of cells extending from one end face to the other end face were partitioned. Next, the ceramic honeycomb formed body was cut so that the length in the direction from one end face to the other end face was longer than the finished dimension.

  Next, the ceramic honeycomb formed body was dried to produce a ceramic honeycomb dried body. Drying was performed by combining dielectric drying and hot air drying. The length from one end face of the ceramic honeycomb dried body to the other end face was 240 mm. The finished size of the dried ceramic honeycomb body was 200 mm. The dried ceramic honeycomb body had a substantially truncated cone shape, and the diameter at one end face was 301.2 mm, and the diameter at the other end face was 298.8 mm.

  In Example 1, finishing was performed using a finishing apparatus 300 as shown in FIGS. 2A to 2D. When the ceramic honeycomb dried body 50 is placed, the finishing apparatus 300 has two points separated from each other in the direction from one end surface 61 to the other end surface 62 of the outer wall 63 surface of the ceramic honeycomb dried body 50 at two points. The first receiving portion 69a and the second receiving portion 69b are supported. The 1st receiving part 69a has the 1st movable receiving stand 68a and the 2nd movable receiving stand 68b provided in the state inclined in reverse C shape. The 2nd receiving part 69b has the 3rd movable receiving stand 68c and the 4th movable receiving stand 68d provided in the state inclined in the shape of an inverted C. The first movable cradle 68a, the second movable cradle 68b, the third movable cradle 68c, and the fourth movable cradle 68d are configured to be independently movable.

  Next, the contour C1, the contour C2, the contour C3, and the contour C4 on the outer wall surface of the dried ceramic honeycomb body were measured. The contour C1 is a part of the contour supported by the first movable cradle, the contour C2 is a part of the contour supported by the second movable cradle, and the contour C3 is the third movable cradle. The contour C4 is a part that is supported by the fourth movable cradle. As shown in FIG. 4, the measurement of the contour was performed using a laser displacement meter 67 by placing the dried ceramic honeycomb body 50 on a measurement table 65 that can rotate in a horizontal plane. As the laser displacement meter 67, a reflective non-contact laser displacement meter was used.

  Next, the first movable cradle of the first receiving part was moved by a distance corresponding to the contour C1, and the second movable cradle of the first receiving part was moved by a distance corresponding to the contour C2. Further, the third movable cradle of the second receiving part is moved by a distance corresponding to the contour C3, and the fourth movable cradle of the second receiving part is moved by a distance corresponding to the contour C4. Thereafter, the dried ceramic honeycomb body was chucked by a conveyance chuck and conveyed to the first movable cradle, the second movable cradle, the third movable cradle, and the fourth movable cradle.

  Next, as shown in FIG. 2D, the end face of the ceramic honeycomb dried body 50 placed on the finishing apparatus 300 was finished with the cutting tools 75a and 75b to obtain a finished ceramic honeycomb dried body 70. As the cutting tools 75a and 75b, disc-shaped grindstones were used. In the finishing process, the length from one end face 61 to the other end face 62 of the ceramic honeycomb dried body 50 is processed so as to have a finished dimension.

The resulting finished ceramic honeycomb dried body was degreased and fired to produce a ceramic honeycomb structure. Degreasing and firing were performed in an oxidizing atmosphere. The maximum temperature during firing was 1430 ° C. The ceramic honeycomb structure of Example 1 has a cell density of 62 cells / cm ² and a partition wall thickness of 150 μm. Further, the allowable range of squareness is 1.6 mm. Ten ceramic honeycomb structures were manufactured by such a method. Table 1 shows the cell density and the partition wall thickness.

  The squareness (mm) of the obtained ceramic honeycomb structure was determined. And the average value (arithmetic mean) of perpendicularity in the 10 manufactured ceramic honeycomb structures was obtained. Table 1 shows an average value of squareness in the 10 manufactured ceramic honeycomb structures. In Table 1, the average value of squareness in the 10 manufactured ceramic honeycomb structures is described as “average squareness after finishing (mm)”.

(Comparative Example 1)
Except that a dried ceramic honeycomb body in which the cell density after firing and the thickness of the partition walls after firing had the values shown in Table 1 was prepared, and the finishing process was performed by the following method, the same as in Example 1. A ceramic honeycomb structure was manufactured by the method described above. In Comparative Example 1, finishing was performed by placing the ceramic honeycomb dried body on a cradle that is not movable in the vertical direction without measuring the contour. Ten ceramic honeycomb structures were manufactured by such a method. Table 1 shows the cell density and the partition wall thickness. Further, the squareness (mm) of the obtained ceramic honeycomb structure was determined in the same manner as in Example 1. Table 1 shows the average squareness (mm) after finishing.

(result)
According to the manufacturing method of Example 1, compared with the manufacturing method of Comparative Example 1, a ceramic honeycomb structure having an excellent squareness could be manufactured. In Comparative Example 1, since the ceramic honeycomb dried body having a substantially truncated cone shape was supported on the cradle for finishing as it was and finished, the end face of the ceramic honeycomb structure obtained by the finishing was directly processed. The angle has deteriorated. That is, each end face of the ceramic honeycomb structure does not become a vertical plane with respect to the central axis of the obtained ceramic honeycomb structure, and the squareness is adversely deteriorated by finishing.

  The method for manufacturing a ceramic honeycomb structure of the present invention can be used in a method for manufacturing a ceramic honeycomb structure having an excellent perpendicularity of the end face. The finishing apparatus for a dried ceramic honeycomb body of the present invention can be used in the finishing process of the above-described method for manufacturing a ceramic honeycomb structure of the present invention.

50: Ceramic honeycomb dried body, 50a, 50b: Surplus part, 51: Partition wall, 52: Cell, 61: One end face, 62: The other end face, 63: Outer wall, 65: Measuring stand, 66: Spacer, 67: Laser Displacement meter, 68a: first movable receiver, 68b: second movable receiver, 68c: third movable receiver, 68d: fourth movable receiver, 69a: first receiver, 69b: second receiver, 70 : Finished ceramic honeycomb dried body, 71a, 71b, 71c, 71d: Ball screw, 72a, 72b, 72c, 72d: Motor, 75a, 75b: Cutting tool, 76: Fixed jig, 76a: Fixed part, 76b: Vertical movable part, 80: rotational direction, 100, 200: ceramic honeycomb structure, 111: one end face, 111a: point (one point on the periphery of one end face), 112: the other end face, 112 : End point (end point of the peripheral edge of the other end surface), 115: imaginary line, 116: virtual surface, 118: intersection point, 300: finishing processing apparatus, A: finishing process, B: firing process, C1, C2, C3, C4: Contour, L: direction from one end face to the other end face, m: finishing dimension, P01, P02: contour measurement start point, P1: part supported by the first movable cradle, P2: second movable cradle P3: part supported by the third movable cradle, P4: part supported by the fourth movable cradle, R: circumferential direction, Q1: first measurement part, Q2: first Two measurement parts, U: movable direction (vertical direction), Y1: length (perpendicularity).

Claims (11)

The length in the direction from the one end face to the other end face of the cylindrical ceramic honeycomb dried body in which a plurality of cells extending from one end face to the other end face are partitioned by partition walls is set to the finish dimension. A finishing process is performed to obtain a finished ceramic honeycomb dried body by finishing,
In the finishing step, the outer surface of the ceramic honeycomb dried body has a first receiving portion having a first movable cradle and a second movable cradle, and a second movable cradle and a second movable cradle. From the finished dimensions at the end on the one end surface side and the end on the other end surface side of the ceramic honeycomb dried body supported by the receiving portion and supported on the first receiving portion and the second receiving portion. Cutting and removing each surplus part of
The first movable receiver and the second movable receiver in the first receiver, and the third movable receiver and the fourth movable receiver in the second receiver are movable independently of each other. Is composed of
Prior to supporting the ceramic honeycomb dried body on the first receiving portion and the second receiving portion, the ceramic honeycomb dried body is supported by the first movable cradle of the first receiving portion on the outer wall surface of the ceramic honeycomb dried body. Of the portion supported by the second movable cradle of the first receiver and the contour C1, of the portion supported by the third movable pedestal of the contour C2 and the second receiver, The contour C3 and the contour C4 of the portion of the second receiving portion supported by the fourth movable cradle are measured, and the distance corresponding to the contour C1, the contour C2, the contour C3, and the contour C4 is measured. The first movable receiving base of the first receiving part, the second movable receiving base of the first receiving part, the third movable receiving base of the second receiving part, and the fourth movable part of the second receiving part received Method for producing a ceramic honeycomb structure in which each independently is movable.   The first movable cradle and the second movable cradle of the first receiving part are configured in an inverted C shape, and the third movable cradle of the second receiving part The method for manufacturing a ceramic honeycomb structure according to claim 1, wherein the fourth movable cradle is configured in an inverted C shape.   3. The ceramic honeycomb structure according to claim 1, wherein the dried ceramic honeycomb body is placed on a measurement table so that the one end surface is a bottom surface, and the contours C1, C2, C3, and C4 are measured. Method.   The method for manufacturing a ceramic honeycomb structure according to claim 3, wherein spacers are disposed at least at three positions between the ceramic honeycomb dried body and the measurement table.   5. The method for manufacturing a ceramic honeycomb structure according to claim 3, wherein when the ceramic honeycomb dried body is placed on the measurement table, a difference in inclination of a bottom surface of the ceramic honeycomb dried body with respect to a horizontal plane is 4 mm or less. .   The method for manufacturing a ceramic honeycomb structure according to any one of claims 1 to 5, wherein the contours C1, C2, C3, and C4 are measured by a reflective non-contact laser displacement meter.   The method for manufacturing a ceramic honeycomb structure according to any one of claims 1 to 6, wherein a temperature of the ceramic honeycomb dried body when measuring the contours C1, C2, C3, and C4 is 20 to 150 ° C.   The method for manufacturing a ceramic honeycomb structure according to any one of claims 1 to 7, wherein the dried ceramic honeycomb body has irregularities on an outer periphery.   The method for manufacturing a ceramic honeycomb structure according to any one of claims 1 to 8, wherein an outer diameter of the ceramic honeycomb dried body is 100 mm or more.   The method for manufacturing a ceramic honeycomb structure according to any one of claims 1 to 9, wherein the dried ceramic honeycomb body is made of a forming raw material that is fired to become cordierite. The length in the direction from the one end face to the other end face of the cylindrical ceramic honeycomb dried body in which a plurality of cells extending from one end face to the other end face are partitioned by partition walls is set to the finish dimension. A finishing device for a dried ceramic honeycomb body for finishing,
A first movable cradle that supports two points separated from each other in the direction from the one end surface to the other end surface of the outer surface of the ceramic honeycomb drying when the ceramic honeycomb dried body is placed. And a first receiving part having a second movable cradle, and a second receiving part having a third movable cradle and a fourth movable cradle,
Each surplus portion from the finished dimension at the end on the one end face side and the end on the other end face side of the ceramic honeycomb dried body supported on the first receiving part and the second receiving part A processing device for cutting and removing each of the ceramic honeycomb dried bodies, wherein the first movable cradle, the second movable cradle, the third movable cradle, and the fourth movable cradle are independently movable. Finishing device.

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