JP6803487B2

JP6803487B2 - Formwork cleaning method and ceramic molded product manufacturing method

Info

Publication number: JP6803487B2
Application number: JP2020021433A
Authority: JP
Inventors: 芳匡倉田; 誠大森; 真司藤崎
Original assignee: NGK Insulators Ltd
Current assignee: NGK Insulators Ltd
Priority date: 2019-02-13
Filing date: 2020-02-12
Publication date: 2020-12-23
Anticipated expiration: 2040-02-12
Also published as: JP2020131708A

Description

本発明は、型枠の洗浄方法及びセラミックス成形体の製造方法に関する。 The present invention relates to a method for cleaning a mold and a method for producing a ceramic molded product.

一般に、セラミックス部材は、例えば、電気化学素子用の支持体、フィルター、センサ、触媒担体、断熱材、防音材、防震材、生体材などの幅広い用途に利用されている。セラミックス部材は、所定形状のセラミックス成形体を焼成することによって作製される。 In general, ceramic members are used in a wide range of applications such as supports for electrochemical elements, filters, sensors, catalyst carriers, heat insulating materials, soundproofing materials, seismic insulating materials, and biological materials. The ceramic member is produced by firing a ceramic molded body having a predetermined shape.

セラミックス成形体の製造方法としては、鋳込み成形法の一つであるモールドキャスト法が知られている（例えば、特許文献１参照）。モールドキャスト法は、セラミック粉末、分散媒及びゲル化剤などを含有する成形用スラリーを金型に注入した後、成形用スラリーを固化（ゲル化）させることによってセラミック成形体を製造する方法である。固化したセラミックス成形体を金型から取り出しやすくするために、金型を構成する各型枠の表面は離型剤によって被覆されている。 As a method for producing a ceramic molded product, a mold casting method, which is one of the casting molding methods, is known (see, for example, Patent Document 1). The mold casting method is a method for producing a ceramic molded product by injecting a molding slurry containing a ceramic powder, a dispersion medium, a gelling agent, etc. into a mold and then solidifying (gelling) the molding slurry. .. In order to make it easy to take out the solidified ceramic molded product from the mold, the surface of each mold constituting the mold is covered with a mold release agent.

セラミックス成形体を取り出した後の型枠には、セラミック粉末、分散媒及びゲル化剤の少なくとも１つを含む固着物や、型枠の表面を被覆する離型剤などの付着物が付いている。そのため、成形用スラリーを注入する前に型枠を洗浄することによって、付着物を除去する必要がある。 After the ceramic molded product is taken out, the mold has a fixed substance containing at least one of ceramic powder, a dispersion medium and a gelling agent, and an deposit such as a mold release agent that coats the surface of the mold. .. Therefore, it is necessary to remove the deposits by cleaning the mold before injecting the molding slurry.

ここで、特許文献１では、型枠の表面に付着した付着物を溶剤によって膨潤させる工程と、型枠の表面をブラッシングすることによって付着物を除去する工程とを備える洗浄方法が提案されている。 Here, Patent Document 1 proposes a cleaning method including a step of swelling the deposits adhering to the surface of the mold with a solvent and a step of removing the deposits by brushing the surface of the mold. ..

特開２００７−１１３２号公報Japanese Unexamined Patent Publication No. 2007-1132

しかしながら、特許文献１の手法によって付着物を十分に除去することは困難であり、付着物が付いた型枠を用いてセラミック成形体を成形すれば、セラミック成形体の外形寸法精度が低くなってしまう。 However, it is difficult to sufficiently remove the deposits by the method of Patent Document 1, and if the ceramic molded product is molded using the mold with the deposits, the external dimensional accuracy of the ceramic molded product becomes low. It ends up.

本発明は、洗浄効率を向上可能な型枠の洗浄方法、及びセラミックス成形体の外形寸法精度を向上可能なセラミックス成形体の製造方法の提供を目的とする。 An object of the present invention is to provide a method for cleaning a mold that can improve cleaning efficiency and a method for manufacturing a ceramic molded product that can improve the external dimensional accuracy of the ceramic molded product.

本発明は、成形用スラリーを注入するための凹部が形成された表面を有する型枠の洗浄方法にかかり、軸心を中心として回転する回転ブラシによって、型枠の表面をブラッシングするブラッシング工程を備える。ブラッシング工程では、軸心と平行な方向から見た場合に、型枠の表面の第１端の外側に設定される第１位置から、型枠の表面の第２端の外側に設定される第２位置まで、回転ブラシを移動させる。 The present invention relates to a method for cleaning a mold having a surface on which a recess for injecting a molding slurry is formed, and includes a brushing step of brushing the surface of the mold with a rotating brush that rotates about an axis. .. In the brushing step, when viewed from a direction parallel to the axis, the first position set outside the first end of the surface of the formwork is set to the outside of the second end of the surface of the formwork. Move the rotating brush to two positions.

本発明によれば、洗浄効率を向上可能な型枠の洗浄方法、及びセラミックス成形体の外形寸法精度を向上可能なセラミックス成形体の製造方法を提供することができる。 According to the present invention, it is possible to provide a method for cleaning a mold that can improve cleaning efficiency and a method for manufacturing a ceramic molded product that can improve the external dimensional accuracy of the ceramic molded product.

実施形態に係る金型の断面図である。It is sectional drawing of the mold which concerns on embodiment. 実施形態に係る金型の分解図である。It is an exploded view of the mold which concerns on embodiment. 実施形態に係る金型の洗浄方法を説明するための模式図である。It is a schematic diagram for demonstrating the cleaning method of the mold which concerns on embodiment. 実施形態に係る金型の洗浄方法を説明するための模式図である。It is a schematic diagram for demonstrating the cleaning method of the mold which concerns on embodiment.

（金型１０の構成）
本実施形態に係る金型１０の構成について、図面を参照しながら説明する。図１は、金型１０の断面図である。図２は、金型１０の分解図である。 (Structure of mold 10)
The configuration of the mold 10 according to the present embodiment will be described with reference to the drawings. FIG. 1 is a cross-sectional view of the mold 10. FIG. 2 is an exploded view of the mold 10.

金型１０は、鋳込み成形法の一つであるモールドキャスト法によって、成形用スラリーを固化（ゲル化）してセラミック成形体を成形するために用いられる。セラミック成形体は、焼成によりセラミックス部材となる。セラミックス部材としては、電気化学素子（例えば、燃料電池セル、電解セルなど）の支持体が挙げられるが、これに限らず幅広い用途に利用されうる。セラミック成形体の製造方法については後述する。 The mold 10 is used for solidifying (gelling) a molding slurry by a mold casting method, which is one of the casting molding methods, to form a ceramic molded body. The ceramic molded body becomes a ceramic member by firing. Examples of the ceramic member include a support for an electrochemical element (for example, a fuel cell, an electrolytic cell, etc.), but the ceramic member is not limited to this and can be used in a wide range of applications. The method for producing the ceramic molded product will be described later.

金型１０は、型枠１１を備える。本実施形態において、型枠１１は、第１型枠１２及び第２型枠１３によって構成される。ただし、型枠１１は、成形されたセラミック成形体を取り出すことができる構造であればよく、例えば、３つ以上の型枠によって構成されていてもよい。 The mold 10 includes a mold 11. In the present embodiment, the formwork 11 is composed of the first formwork 12 and the second formwork 13. However, the mold 11 may have a structure that allows the molded ceramic molded product to be taken out, and may be composed of, for example, three or more molds.

型枠１１は、成形用スラリーを注入するための注入口１４と、成形用スラリーの注入時に空気及び余剰の成形用スラリーを排出するための排出口１５と、成形用スラリーが注入される内部空間１６とを有する。 The mold 11 has an injection port 14 for injecting the molding slurry, an discharge port 15 for discharging air and excess molding slurry when the molding slurry is injected, and an internal space into which the molding slurry is injected. It has 16.

第１型枠１２は、第２型枠１３と対向する表面１２ａと、表面１２ａに形成された凹部１２ｂと、表面１２ａに連なる第１側面１２ｃと、第１側面１２ｃの反対側の第２側面１２ｄとを有する。凹部１２ｂは、成形用スラリーを注入するためのキャビティーである。 The first formwork 12 has a surface 12a facing the second formwork 13, a recess 12b formed on the surface 12a, a first side surface 12c connected to the surface 12a, and a second side surface opposite to the first side surface 12c. It has 12d and. The recess 12b is a cavity for injecting the molding slurry.

第２型枠１３は、第１型枠１２と対向する表面１３ａと、表面１３ａに形成された凹部１３ｂと、表面１３ａに連なる第１側面１３ｃと、第１側面１３ｃの反対側の第２側面１３ｄとを有する。凹部１３ｂは、成形用スラリーを注入するためのキャビティーである。 The second formwork 13 has a surface 13a facing the first formwork 12, a recess 13b formed on the surface 13a, a first side surface 13c connected to the surface 13a, and a second side surface opposite to the first side surface 13c. It has 13d and. The recess 13b is a cavity for injecting the molding slurry.

第１型枠１２の表面１２ａには、離型剤１７が塗布されている。第２型枠１３の表面１３ａには、離型剤１８が塗布されている。離型剤１７，１８としては、フッ素系、シリコーン系、ウレタン系などの被膜剤を用いることができる。 A mold release agent 17 is applied to the surface 12a of the first mold 12. The mold release agent 18 is applied to the surface 13a of the second mold 13. As the release agents 17 and 18, a coating agent such as fluorine-based, silicone-based, or urethane-based may be used.

第１及び第２型枠１２，１３は、表面１２ａ及び表面１３ａを合わせるように連結される。これにより、凹部１２ｂと凹部１３ｂとが連なって内部空間１６となる。 The first and second molds 12 and 13 are connected so as to align the surface 12a and the surface 13a. As a result, the recess 12b and the recess 13b are connected to form the internal space 16.

（セラミックス成形体の製造方法）
セラミックス成形体の製造方法について説明する。図３及び図４は、後述する第１及び第２ブラッシング工程について説明するための模式図である。 (Manufacturing method of ceramic molded product)
A method for manufacturing a ceramic molded product will be described. 3 and 4 are schematic views for explaining the first and second brushing steps described later.

金型１０を第１及び第２型枠１２，１３に分解してセラミックス成形体を取り出すと、第１及び第２型枠１２，１３には、セラミック粉末、分散媒及びゲル化剤の少なくとも１つを含むゴム状固着物や離型剤１７，１８などの付着物３０が付いている。そのため、セラミックス成形体の製造工程では、まず、第１及び第２型枠１２，１３を洗浄して付着物３０を除去する必要がある。ただし、第１及び第２型枠１２，１３それぞれの洗浄方法は同じであるため、以下、第１型枠１２の洗浄方法について説明する。 When the mold 10 is decomposed into the first and second molds 12 and 13 and the ceramic molded product is taken out, at least one of the ceramic powder, the dispersion medium and the gelling agent is contained in the first and second molds 12 and 13. There are rubber-like adhered substances including one and deposits 30 such as mold release agents 17 and 18. Therefore, in the manufacturing process of the ceramic molded product, it is first necessary to wash the first and second molds 12 and 13 to remove the deposits 30. However, since the cleaning methods for the first and second molds 12 and 13 are the same, the cleaning method for the first mold 12 will be described below.

１．予熱工程
３０℃以上８０℃以下の洗浄液に第１型枠１２を浸漬させることによって、離型剤１７を溶融させるとともに、第１型枠１２を予熱する。浸漬時間は特に制限されないが、例えば１分以上とすることができる。これにより、加熱だけでは除去されにくいゴム状固着物を膨潤させることによって、第１型枠１２とゴム状固着物との密着力を低下させることができる。洗浄液は、少なくとも水を含んでいればよいが、中性洗剤を含んでいることが特に好ましい。これにより、酸性洗剤又はアルカリ性洗剤を用いる場合に比べて、第１型枠１２の腐食や劣化を抑制することができる。 1. 1. Preheating step By immersing the first mold 12 in a cleaning liquid of 30 ° C. or higher and 80 ° C. or lower, the mold release agent 17 is melted and the first mold 12 is preheated. The immersion time is not particularly limited, but can be, for example, 1 minute or more. As a result, the adhesive force between the first mold 12 and the rubber-like adhered material can be reduced by swelling the rubber-like adhered material which is difficult to remove only by heating. The cleaning liquid may contain at least water, but it is particularly preferable that the cleaning liquid contains a neutral detergent. As a result, corrosion and deterioration of the first mold 12 can be suppressed as compared with the case where an acidic detergent or an alkaline detergent is used.

２．第１ブラッシング工程
洗浄液から第１型枠１２を引き出した後、図３に示すように、軸心ＡＸを中心として回転する回転ブラシ２０によって、第１型枠１２の表面１２ａをブラッシングする。これにより、第１型枠１２の表面１２ａに残留している付着物３０を除去する。なお、上述した予熱工程において離型剤１７の大部分が除去されるのに対して、ゴム状固着物は残留しやすい。そのため、この第１ブラッシング工程では、付着物３０として主にゴム状固着物を除去対象としている。 2. 2. First Brushing Step After the first mold 12 is pulled out from the cleaning liquid, the surface 12a of the first mold 12 is brushed with a rotating brush 20 that rotates about the axis AX, as shown in FIG. As a result, the deposit 30 remaining on the surface 12a of the first mold 12 is removed. In the preheating step described above, most of the release agent 17 is removed, whereas the rubber-like adhered substance tends to remain. Therefore, in this first brushing step, the rubber-like adhered matter is mainly removed as the deposit 30.

第１ブラッシング工程では、図３に示すとおり、軸心ＡＸと平行な方向から回転ブラシ２０を見た場合に、第１位置Ｐ１から第２位置Ｐ２まで、回転ブラシ２０の軸心ＡＸを移動させる。第１位置Ｐ１は、軸心ＡＸの移動方向Ｄ１において、表面１２ａの第１端Ａ１の外側に設定される。第２位置Ｐ２は、軸心ＡＸの移動方向Ｄ１において、表面１２ａの第２端Ａ２の外側に設定される。第１及び第２端Ａ１，Ａ２は、軸心ＡＸと平行な方向から第１型枠１２を側面視した場合における表面１２ａの両端である。第１端Ａ１は、表面１２ａと第１側面１２ｃとの交点であり、第２端Ａ２は、表面１２ａと第２側面１２ｄとの交点である。 In the first brushing step, as shown in FIG. 3, when the rotary brush 20 is viewed from a direction parallel to the axial center AX, the axial center AX of the rotary brush 20 is moved from the first position P1 to the second position P2. .. The first position P1 is set outside the first end A1 of the surface 12a in the moving direction D1 of the axis AX. The second position P2 is set outside the second end A2 of the surface 12a in the moving direction D1 of the axis AX. The first and second ends A1 and A2 are both ends of the surface 12a when the first mold 12 is viewed sideways from a direction parallel to the axis AX. The first end A1 is the intersection of the surface 12a and the first side surface 12c, and the second end A2 is the intersection of the surface 12a and the second side surface 12d.

このように、回転ブラシ２０の軸心ＡＸを第１端Ａ１の外側から第２端Ａ２の外側まで移動させることによって、回転ブラシ２０で表面１２ａの全面を効率的に洗浄することができる。特に、表面１２ａの両端付近に付いている付着物３０を効率的に除去することができる。 In this way, by moving the axial center AX of the rotary brush 20 from the outside of the first end A1 to the outside of the second end A2, the entire surface 12a can be efficiently cleaned by the rotary brush 20. In particular, the deposits 30 attached to both ends of the surface 12a can be efficiently removed.

ここで、回転ブラシ２０で表面１２ａは、第１平行面ａ１と、第２平行面ａ２と、第３平行面ａ３と、第１斜面ａ４と、第２斜面ａ５とを含んでいる。第１平行面ａ１は、軸心ＡＸの移動方向Ｄ１に略平行であり、第１端Ａ１を含む。第２平行面ａ２は、移動方向Ｄ１に略平行であり、第２端Ａ２を含む。第２平行面ａ２は、移動方向Ｄ１において第１平行面ａ１の反対側に設けられる。第３平行面ａ３は、移動方向Ｄ１に略平行であり、凹部１２ｂの底面である。第３平行面ａ３は、移動方向Ｄ１に垂直な方向（以下、「垂直方向」という。）において第１及び第２平行面ａ１，ａ２よりも軸心ＡＸから離れている。第１斜面ａ４は、第１平行面ａ１と第３平行面ａ３とに連なる。第１斜面ａ４は、第１平行面ａ１から第３平行面ａ３に向かって徐々に低くなる。本実施形態において、第１斜面ａ４は、側面視で曲面状に形成されているが、側面視で平面状に形成されていてもよい。第２斜面ａ５は、第２平行面ａ２と第３平行面ａ３とに連なる。第２斜面ａ５は、第３平行面ａ３から第２平行面ａ２に向かって徐々に高くなる。本実施形態において、第２斜面ａ５は、側面視で曲面状に形成されているが、側面視で平面状に形成されていてもよい。 Here, the surface 12a of the rotating brush 20 includes a first parallel surface a1, a second parallel surface a2, a third parallel surface a3, a first slope a4, and a second slope a5. The first parallel surface a1 is substantially parallel to the moving direction D1 of the axial center AX and includes the first end A1. The second parallel surface a2 is substantially parallel to the moving direction D1 and includes the second end A2. The second parallel surface a2 is provided on the opposite side of the first parallel surface a1 in the moving direction D1. The third parallel surface a3 is substantially parallel to the moving direction D1 and is the bottom surface of the recess 12b. The third parallel plane a3 is farther from the axis AX than the first and second parallel planes a1 and a2 in the direction perpendicular to the moving direction D1 (hereinafter, referred to as "vertical direction"). The first slope a4 is connected to the first parallel surface a1 and the third parallel surface a3. The first slope a4 gradually decreases from the first parallel surface a1 toward the third parallel surface a3. In the present embodiment, the first slope a4 is formed in a curved surface shape in a side view, but may be formed in a plane shape in a side view. The second slope a5 is connected to the second parallel surface a2 and the third parallel surface a3. The second slope a5 gradually rises from the third parallel plane a3 toward the second parallel plane a2. In the present embodiment, the second slope a5 is formed in a curved surface shape in a side view, but may be formed in a plane shape in a side view.

また、回転ブラシ２０は、軸部２１と、毛部２２とを有する。軸部２１は、軸心ＡＸを中心として回転する。軸心ＡＸは、本発明に係る「軸心」の一例である。本実施形態において、軸心ＡＸは、第１型枠１２の幅方向に沿って延びているが、これに限られない。毛部２２は、軸部２１に取り付けられる。毛部２２は、軸部２１から放射状に延びる複数のブラシ毛によって構成される。 Further, the rotary brush 20 has a shaft portion 21 and a bristles portion 22. The shaft portion 21 rotates about the axis AX. The axis AX is an example of the "axis" according to the present invention. In the present embodiment, the axial center AX extends along the width direction of the first mold 12, but is not limited to this. The hair portion 22 is attached to the shaft portion 21. The bristles 22 are composed of a plurality of brush bristles extending radially from the shaft portion 21.

第１ブラッシング工程において、第１乃至第３平行面ａ１〜ａ３それぞれに沿って軸心ＡＸを右方向に移動させる場合、回転ブラシ２０を左回転（すなわち、反時計回りの回転）させてもよい。すなわち、軸心ＡＸが第１乃至第３平行面ａ１〜ａ３それぞれの上方を右方向に移動する間は、軸部２１を左回転させてもよい。これにより、第１乃至第３平行面ａ１〜ａ３上を毛部２２の先端が移動する方向を移動方向Ｄ１と同じにすることができるため、回転ブラシの移動に伴い、より強い力で付着物を除去することができる。 In the first brushing step, when the axial center AX is moved to the right along each of the first to third parallel planes a1 to a3, the rotary brush 20 may be rotated counterclockwise (that is, counterclockwise). .. That is, the shaft portion 21 may be rotated counterclockwise while the shaft center AX moves above each of the first to third parallel planes a1 to a3 in the right direction. As a result, the direction in which the tip of the hair portion 22 moves on the first to third parallel planes a1 to a3 can be made the same as the moving direction D1, so that the deposits are more strongly applied as the rotating brush moves. Can be removed.

第１ブラッシング工程において、第１乃至第３平行面ａ１〜ａ３それぞれに沿って軸心ＡＸを右方向に移動させる場合、回転ブラシ２０を右回転（すなわち、時計回りの回転）させてもよい。すなわち、軸心ＡＸが第１乃至第３平行面ａ１〜ａ３それぞれの上方を右方向に移動する間は、軸部２１を右回転させてもよい。これにより、第１乃至第３平行面ａ１〜ａ３上を毛部２２の先端が移動する方向を移動方向Ｄ１と反対にすることができるため、回転ブラシによる枠型への負荷（傷、摩耗など）を低減することができる。 In the first brushing step, when the axial center AX is moved to the right along each of the first to third parallel planes a1 to a3, the rotary brush 20 may be rotated clockwise (that is, clockwise). That is, the shaft portion 21 may be rotated clockwise while the shaft center AX moves above each of the first to third parallel planes a1 to a3 in the right direction. As a result, the direction in which the tip of the hair portion 22 moves on the first to third parallel surfaces a1 to a3 can be opposite to the moving direction D1, so that the load (scratch, wear, etc.) on the frame shape by the rotating brush can be made. ) Can be reduced.

第１ブラッシング工程において、第１斜面ａ４に沿って軸心ＡＸを右方向に移動させる場合、回転ブラシ２０を左回転させてもよい。すなわち、軸心ＡＸが第１斜面ａ４の上方を右方向に移動する間は、軸部２１を左回転させてもよい。これにより、第１斜面ａ４上を毛部２２の先端が移動する方向を移動方向Ｄ１と同じにすることができるため、回転ブラシの移動に伴い、より強い力で付着物を除去することができる。 In the first brushing step, when the axial center AX is moved to the right along the first slope a4, the rotary brush 20 may be rotated counterclockwise. That is, the shaft portion 21 may be rotated counterclockwise while the shaft center AX moves above the first slope a4 in the right direction. As a result, the direction in which the tip of the bristles 22 moves on the first slope a4 can be made the same as the moving direction D1, so that the deposits can be removed with a stronger force as the rotating brush moves. ..

第１ブラッシング工程において、第１斜面ａ４に沿って軸心ＡＸを右方向に移動させる場合、回転ブラシ２０を右回転させてもよい。すなわち、軸心ＡＸが第１斜面ａ４の上方を右方向に移動する間は、軸部２１を右回転させてもよい。これにより、第１斜面ａ４上を毛部２２の先端が移動する方向を移動方向Ｄ１と反対にすることができるため、回転ブラシによる枠型への負荷（傷、摩耗など）を低減することができる。 In the first brushing step, when the axial center AX is moved to the right along the first slope a4, the rotary brush 20 may be rotated to the right. That is, the shaft portion 21 may be rotated clockwise while the shaft center AX moves above the first slope a4 in the right direction. As a result, the direction in which the tip of the hair portion 22 moves on the first slope a4 can be opposite to the moving direction D1, so that the load (scratch, wear, etc.) on the frame by the rotating brush can be reduced. it can.

また、第１斜面ａ４の上方における軸心ＡＸの移動速度を、第１平行面ａ１の上方における軸心ＡＸの移動速度より遅くすることが好ましい。これにより、第１平行面ａ１に比べて回転ブラシ２０を付着物３０に接触させにくい第１斜面ａ４における付着物３０の残留率を低減させることができる。特に、第１斜面ａ４の上方における軸心ＡＸの平均移動速度を第１平行面ａ１の上方における軸心ＡＸの平均移動速度の１．１倍以上とすることによって、付着物３０の残留率をより低減させることができる。 Further, it is preferable that the moving speed of the axial center AX above the first slope a4 is slower than the moving speed of the axial center AX above the first parallel surface a1. As a result, it is possible to reduce the residual rate of the deposit 30 on the first slope a4, which makes it difficult for the rotating brush 20 to come into contact with the deposit 30 as compared with the first parallel surface a1. In particular, by setting the average moving speed of the axial center AX above the first slope a4 to 1.1 times or more the average moving speed of the axial center AX above the first parallel surface a1, the residual rate of the deposit 30 can be increased. It can be further reduced.

特に、回転ブラシ２０を第１斜面ａ４上で停止させることが好ましい。これにより、第１斜面ａ４における付着物３０の残留率を更に低減させることができる。 In particular, it is preferable to stop the rotating brush 20 on the first slope a4. As a result, the residual rate of the deposit 30 on the first slope a4 can be further reduced.

第１ブラッシング工程において、第２斜面ａ５に沿って軸心ＡＸを右方向に移動させる場合、回転ブラシ２０を左回転させてもよい。すなわち、軸心ＡＸが第２斜面ａ５の上方を右方向に移動する間は、軸部２１を左回転させてもよい。これにより、第２斜面ａ５上を毛部２２の先端が移動する方向を移動方向Ｄ１と同じにすることができるため、回転ブラシの移動に伴い、より強い力で付着物を除去することができる。 In the first brushing step, when the axial center AX is moved to the right along the second slope a5, the rotary brush 20 may be rotated counterclockwise. That is, the shaft portion 21 may be rotated counterclockwise while the shaft center AX moves above the second slope a5 in the right direction. As a result, the direction in which the tip of the bristles 22 moves on the second slope a5 can be made the same as the moving direction D1, so that the deposits can be removed with a stronger force as the rotating brush moves. ..

第１ブラッシング工程において、第２斜面ａ５に沿って軸心ＡＸを右方向に移動させる場合、回転ブラシ２０を右回転させてもよい。すなわち、軸心ＡＸが第２斜面ａ５の上方を右方向に移動する間は、軸部２１を右回転させてもよい。これにより、第２斜面ａ５上を毛部２２の先端が移動する方向を移動方向Ｄ１と反対にすることができるため、回転ブラシによる枠型への負荷（傷、摩耗など）を低減することができる。 In the first brushing step, when the axial center AX is moved to the right along the second slope a5, the rotary brush 20 may be rotated to the right. That is, the shaft portion 21 may be rotated clockwise while the shaft center AX moves above the second slope a5 in the right direction. As a result, the direction in which the tip of the hair portion 22 moves on the second slope a5 can be opposite to the moving direction D1, so that the load (scratch, wear, etc.) on the frame by the rotating brush can be reduced. it can.

また、第２斜面ａ５の上方における軸心ＡＸの移動速度を、第３平行面ａ３の上方における軸心ＡＸの移動速度より遅くすることが好ましい。これにより、第３平行面ａ３に比べて回転ブラシ２０を付着物３０に接触させにくい第２斜面ａ５における付着物３０の残留率を低減させることができる。特に、第２斜面ａ５の上方における軸心ＡＸの平均移動速度を第３平行面ａ３の上方における軸心ＡＸの平均移動速度の１．１倍以上とすることによって、付着物３０の残留率をより低減させることができる。 Further, it is preferable that the moving speed of the axial center AX above the second slope a5 is slower than the moving speed of the axial center AX above the third parallel surface a3. As a result, it is possible to reduce the residual rate of the deposit 30 on the second slope a5, which makes it difficult for the rotating brush 20 to come into contact with the deposit 30 as compared with the third parallel surface a3. In particular, by setting the average moving speed of the axial center AX above the second slope a5 to 1.1 times or more the average moving speed of the axial center AX above the third parallel surface a3, the residual rate of the deposit 30 can be increased. It can be further reduced.

特に、回転ブラシ２０を第２斜面ａ５上で停止させることが好ましい。これにより、第２斜面ａ５における付着物３０の残留率を更に低減させることができる。 In particular, it is preferable to stop the rotating brush 20 on the second slope a5. As a result, the residual rate of the deposit 30 on the second slope a5 can be further reduced.

第１ブラッシング工程において、回転ブラシ２０が第１位置Ｐ１に位置する場合、毛部２２は、第１端Ａ１において表面１２ａに連なる第１側面１２ｃに接触することが好ましい。これにより、例えば注入口１４又は排出口１５から溢れ出て固化した成形用スラリーが第１側面１２ｃに付着していたとしても、当該付着物を第１側面１２ｃから除去することができる。 In the first brushing step, when the rotary brush 20 is located at the first position P1, the bristles 22 preferably come into contact with the first side surface 12c connected to the surface 12a at the first end A1. Thereby, for example, even if the molding slurry overflowing from the injection port 14 or the discharge port 15 and solidified adheres to the first side surface 12c, the deposit can be removed from the first side surface 12c.

第１ブラッシング工程において、回転ブラシ２０が第２位置Ｐ２に位置する場合、毛部２２は、第２端Ａ２において表面１２ａに連なる第２側面１２ｄに接触することが好ましい。これにより、例えば注入口１４又は排出口１５から溢れ出て固化した成形用スラリーが第２側面１２ｄに付着していたとしても、当該付着物を第２側面１２ｄから除去することができる。 In the first brushing step, when the rotary brush 20 is located at the second position P2, the bristles 22 preferably come into contact with the second side surface 12d connected to the surface 12a at the second end A2. Thereby, for example, even if the molding slurry that overflows from the injection port 14 or the discharge port 15 and is solidified adheres to the second side surface 12d, the adhered matter can be removed from the second side surface 12d.

また、６０℃における複数のブラシ毛のロックウエル硬度（Ｍスケール）は、７０以上１００以下であることが好ましい。これにより、予熱された第１型枠１２に接触することでブラシ毛が加熱されたとしても、ブラシ毛の形状を維持できるため、表面１２ａに付いている付着物３０をより効率的に除去できる。さらに、６０℃における複数のブラシ毛の曲げ弾性率（ＭＰａ）は、２０００以上４０００以下であることが好ましい。これにより、予熱された第１型枠１２に接触することでブラシ毛が加熱されたとしても、ブラシ毛の弾性を維持できるため、表面１２ａに付いている付着物３０をより効率的に除去することができる。 The rockwell hardness (M scale) of the plurality of brush bristles at 60 ° C. is preferably 70 or more and 100 or less. As a result, even if the brush bristles are heated by contacting with the preheated first mold 12, the shape of the brush bristles can be maintained, so that the deposits 30 attached to the surface 12a can be removed more efficiently. .. Further, the flexural modulus (MPa) of the plurality of brush bristles at 60 ° C. is preferably 2000 or more and 4000 or less. As a result, even if the brush bristles are heated by contacting with the preheated first mold 12, the elasticity of the brush bristles can be maintained, so that the deposits 30 attached to the surface 12a can be removed more efficiently. be able to.

３．第２ブラッシング工程
図４に示すように、回転ブラシ２０の軸心ＡＸを移動方向Ｄ２に移動させることによって、第１型枠１２の表面１２ａを再びブラッシングする。これにより、第１ブラッシング工程では付着物３０を除去しきれなかった場合に、残留している付着物３０を除去する。第１ブラッシング工程において付着物３０を十分除去できる場合、第２ブラッシング工程を行わなくてもよい。 3. 3. Second Brushing Step As shown in FIG. 4, the surface 12a of the first mold 12 is brushed again by moving the axial center AX of the rotary brush 20 in the moving direction D2. As a result, when the deposit 30 cannot be completely removed in the first brushing step, the residual deposit 30 is removed. If the deposit 30 can be sufficiently removed in the first brushing step, the second brushing step may not be performed.

第２ブラッシング工程では、図４に示すとおり、軸心ＡＸと平行な方向から回転ブラシ２０を見た場合に、第２位置Ｐ２から第１位置Ｐ１まで、回転ブラシ２０の軸心ＡＸを移動させる。このように、回転ブラシ２０の軸心ＡＸを第２端Ａ２の外側から第１端Ａ１の外側まで移動させることによって、回転ブラシ２０の毛部２２で表面１２ａの全面を更に洗浄できる。 In the second brushing step, as shown in FIG. 4, when the rotary brush 20 is viewed from a direction parallel to the axial center AX, the axial center AX of the rotary brush 20 is moved from the second position P2 to the first position P1. .. In this way, by moving the axial center AX of the rotating brush 20 from the outside of the second end A2 to the outside of the first end A1, the entire surface 12a can be further washed by the bristles 22 of the rotating brush 20.

第２ブラッシング工程において、第１乃至第３平行面ａ１〜ａ３それぞれに沿って軸心ＡＸを左方向に移動させる場合、回転ブラシ２０を右回転させてもよい。すなわち、軸心ＡＸが第１乃至第３平行面ａ１〜ａ３それぞれの上方を左方向に移動する間は、軸部２１を右回転させてもよい。これにより、第１乃至第３平行面ａ１〜ａ３上を毛部２２の先端が移動する方向を移動方向Ｄ２と同じにすることができるため、回転ブラシの移動に伴い、より強い力で付着物を除去することができる。 In the second brushing step, when the axial center AX is moved to the left along each of the first to third parallel planes a1 to a3, the rotary brush 20 may be rotated to the right. That is, the shaft portion 21 may be rotated clockwise while the shaft center AX moves above each of the first to third parallel planes a1 to a3 in the left direction. As a result, the direction in which the tip of the hair portion 22 moves on the first to third parallel surfaces a1 to a3 can be made the same as the moving direction D2, so that the deposits are more strongly applied as the rotating brush moves. Can be removed.

第２ブラッシング工程において、第１乃至第３平行面ａ１〜ａ３それぞれに沿って軸心ＡＸを左方向に移動させる場合、回転ブラシ２０を左回転させてもよい。すなわち、軸心ＡＸが第１乃至第３平行面ａ１〜ａ３それぞれの上方を左方向に移動する間は、軸部２１を左回転させてもよい。これにより、第１乃至第３平行面ａ１〜ａ３上を毛部２２の先端が移動する方向を移動方向Ｄ２と反対にすることができるため、回転ブラシによる枠型への負荷（傷、摩耗など）を低減することができる。 In the second brushing step, when the axial center AX is moved to the left along each of the first to third parallel planes a1 to a3, the rotary brush 20 may be rotated counterclockwise. That is, the shaft portion 21 may be rotated counterclockwise while the shaft center AX moves above each of the first to third parallel planes a1 to a3 in the left direction. As a result, the direction in which the tip of the hair portion 22 moves on the first to third parallel surfaces a1 to a3 can be opposite to the moving direction D2, so that the load (scratch, wear, etc.) on the frame by the rotating brush can be made. ) Can be reduced.

第２ブラッシング工程において、第２斜面ａ５に沿って軸心ＡＸを左方向に移動させる場合、回転ブラシ２０を右回転させてもよい。すなわち、軸心ＡＸが第２斜面ａ５の上方を左方向に移動する間は、軸部２１を右回転させてもよい。これにより、第２斜面ａ５上を毛部２２の先端が移動する方向を移動方向Ｄ２と同じにすることができるため、回転ブラシの移動に伴い、より強い力で付着物を除去することができる。 In the second brushing step, when the axial center AX is moved to the left along the second slope a5, the rotary brush 20 may be rotated to the right. That is, the shaft portion 21 may be rotated clockwise while the shaft center AX moves above the second slope a5 in the left direction. As a result, the direction in which the tip of the bristles 22 moves on the second slope a5 can be made the same as the moving direction D2, so that the deposits can be removed with a stronger force as the rotating brush moves. ..

第２ブラッシング工程において、第２斜面ａ５に沿って軸心ＡＸを左方向に移動させる場合、回転ブラシ２０を左回転させてもよい。すなわち、軸心ＡＸが第２斜面ａ５の上方を左方向に移動する間は、軸部２１を左回転させてもよい。これにより、第２斜面ａ５上を毛部２２の先端が移動する方向を移動方向Ｄ２と反対にすることができるため、回転ブラシによる枠型への負荷（傷、摩耗など）を低減することができる。 In the second brushing step, when the axial center AX is moved to the left along the second slope a5, the rotary brush 20 may be rotated counterclockwise. That is, the shaft portion 21 may be rotated counterclockwise while the shaft center AX moves above the second slope a5 in the left direction. As a result, the direction in which the tip of the hair portion 22 moves on the second slope a5 can be opposite to the moving direction D2, so that the load (scratch, wear, etc.) on the frame by the rotating brush can be reduced. it can.

また、第２斜面ａ５の上方における軸心ＡＸの移動速度を、第２平行面ａ２の上方における軸心ＡＸの移動速度より遅くすることが好ましい。これにより、第２平行面ａ２に比べて回転ブラシ２０を付着物３０に接触させにくい第２斜面ａ５における付着物３０の残留率を低減させることができる。特に、第２斜面ａ５の上方における軸心ＡＸの平均移動速度を第２平行面ａ２の上方における軸心ＡＸの平均移動速度の１．１倍以上とすることによって、付着物３０の残留率をより低減させることができる。 Further, it is preferable that the moving speed of the axial center AX above the second slope a5 is slower than the moving speed of the axial center AX above the second parallel surface a2. As a result, it is possible to reduce the residual rate of the deposit 30 on the second slope a5, which makes it difficult for the rotating brush 20 to come into contact with the deposit 30 as compared with the second parallel surface a2. In particular, by setting the average moving speed of the axial center AX above the second slope a5 to 1.1 times or more the average moving speed of the axial center AX above the second parallel surface a2, the residual rate of the deposit 30 can be increased. It can be further reduced.

第２ブラッシング工程において、第１斜面ａ４に沿って軸心ＡＸを左方向に移動させる場合、回転ブラシ２０を右回転させてもよい。すなわち、軸心ＡＸが第１斜面ａ４の上方を左方向に移動する間は、軸部２１を右回転させてもよい。これにより、第１斜面ａ４上を毛部２２の先端が移動する方向を移動方向Ｄ２と同じにすることができるため、回転ブラシの移動に伴い、より強い力で付着物を除去することができる。 In the second brushing step, when the axial center AX is moved to the left along the first slope a4, the rotary brush 20 may be rotated to the right. That is, the shaft portion 21 may be rotated clockwise while the shaft center AX moves above the first slope a4 in the left direction. As a result, the direction in which the tip of the bristles 22 moves on the first slope a4 can be made the same as the moving direction D2, so that the deposits can be removed with a stronger force as the rotating brush moves. ..

第２ブラッシング工程において、第１斜面ａ４に沿って軸心ＡＸを左方向に移動させる場合、回転ブラシ２０を左回転させてもよい。すなわち、軸心ＡＸが第１斜面ａ４の上方を左方向に移動する間は、軸部２１を左回転させてもよい。これにより、第１斜面ａ４上を毛部２２の先端が移動する方向を移動方向Ｄ２と反対にすることができるため、回転ブラシによる枠型への負荷（傷、摩耗など）を低減することができる。 In the second brushing step, when the axial center AX is moved to the left along the first slope a4, the rotary brush 20 may be rotated counterclockwise. That is, the shaft portion 21 may be rotated counterclockwise while the shaft center AX moves above the first slope a4 in the left direction. As a result, the direction in which the tip of the hair portion 22 moves on the first slope a4 can be opposite to the moving direction D2, so that the load (scratch, wear, etc.) on the frame by the rotating brush can be reduced. it can.

また、第１斜面ａ４の上方における軸心ＡＸの移動速度を、第３平行面ａ３の上方における軸心ＡＸの移動速度より遅くすることが好ましい。これにより、第３平行面ａ３に比べて回転ブラシ２０を付着物３０に接触させにくい第１斜面ａ４における付着物３０の残留率を低減させることができる。特に、第１斜面ａ４の上方における軸心ＡＸの平均移動速度を第３平行面ａ３の上方における軸心ＡＸの平均移動速度の１．１倍以上とすることによって、付着物３０の残留率をより低減させることができる。 Further, it is preferable that the moving speed of the axial center AX above the first slope a4 is slower than the moving speed of the axial center AX above the third parallel surface a3. As a result, it is possible to reduce the residual rate of the deposit 30 on the first slope a4, which makes it difficult for the rotating brush 20 to come into contact with the deposit 30 as compared with the third parallel surface a3. In particular, by setting the average moving speed of the axial center AX above the first slope a4 to 1.1 times or more the average moving speed of the axial center AX above the third parallel surface a3, the residual rate of the deposit 30 can be increased. It can be further reduced.

第２ブラッシング工程において、回転ブラシ２０が第２位置Ｐ２に位置する場合、毛部２２は、第２端Ａ２において表面１２ａに連なる第２側面１２ｄに接触することが好ましい。これにより、例えば注入口１４又は排出口１５から溢れ出て固化した成形用スラリーが第２側面１２ｄに付着していたとしても、当該付着物を第２側面１２ｄから除去することができる。 In the second brushing step, when the rotary brush 20 is located at the second position P2, the bristles 22 preferably come into contact with the second side surface 12d connected to the surface 12a at the second end A2. Thereby, for example, even if the molding slurry that overflows from the injection port 14 or the discharge port 15 and is solidified adheres to the second side surface 12d, the adhered matter can be removed from the second side surface 12d.

第２ブラッシング工程において、回転ブラシ２０が第１位置Ｐ１に位置する場合、毛部２２は、第１端Ａ１において表面１２ａに連なる第１側面１２ｃに接触することが好ましい。これにより、例えば注入口１４又は排出口１５から溢れ出て固化した成形用スラリーが第１側面１２ｃに付着していたとしても、当該付着物を第１側面１２ｃから除去することができる。 In the second brushing step, when the rotary brush 20 is located at the first position P1, the bristles 22 preferably come into contact with the first side surface 12c connected to the surface 12a at the first end A1. Thereby, for example, even if the molding slurry overflowing from the injection port 14 or the discharge port 15 and solidified adheres to the first side surface 12c, the deposit can be removed from the first side surface 12c.

４．離型剤塗布工程
洗浄された第１型枠１２の表面１２ａに離型剤１７を塗布する。同様に、洗浄された第２型枠１３の表面１３ａにも離型剤１８を塗布する。離型剤１７，１８の塗布方法は特に制限されず、例えば、静電塗布法、ディップコート法、スプレーコート法、ロールコート法などを用いることができる。 4. Release agent application step The release agent 17 is applied to the surface 12a of the washed first mold 12. Similarly, the release agent 18 is also applied to the surface 13a of the washed second mold 13. The method of applying the release agents 17 and 18 is not particularly limited, and for example, an electrostatic coating method, a dip coating method, a spray coating method, a roll coating method and the like can be used.

５．成形用スラリー調製工程
セラミックス粉末、分散媒、及びゲル化剤を混合して成形用スラリーを調製する。セラミックス粉末は、セラミックス部材に必要とされる特性に応じて適宜選択される。 5. Molding Slurry Preparation Step A molding slurry is prepared by mixing ceramic powder, dispersion medium, and gelling agent. The ceramic powder is appropriately selected according to the characteristics required for the ceramic member.

６．成形用スラリー注入工程
第１及び第２型枠１２，１３を連結させて金型１０を組み立て、第１型枠１２の注入口１４から内部空間１６に成形用スラリーを注入する。その後、一定時間（例えば、１時間）放置して、成形用スラリーを固化（ゲル化）させることによって、セラミックス成形体を形成する。そして、第２型枠１３から第１型枠１２を取り外して、セラミックス成形体を取り出す。 6. Molding Slurry Injection Step The mold 10 is assembled by connecting the first and second molds 12 and 13, and the molding slurry is injected into the internal space 16 from the injection port 14 of the first mold 12. After that, it is left for a certain period of time (for example, 1 hour) to solidify (gel) the molding slurry to form a ceramic molded product. Then, the first mold 12 is removed from the second mold 13 and the ceramic molded body is taken out.

上述した予熱工程、第１ブラッシング工程及び第２ブラッシング工程により、第１及び第２型枠１２，１３それぞれから付着物３０が十分に除去されているため、製造されるセラミック成形体の外形寸法精度を向上させることができる。 Since the deposits 30 are sufficiently removed from each of the first and second molds 12 and 13 by the preheating step, the first brushing step and the second brushing step described above, the external dimensional accuracy of the ceramic molded product to be manufactured Can be improved.

＜他の実施形態＞
以上、本発明の実施形態について説明したが、本発明はこれらに限定されるものではなく、本発明の趣旨を逸脱しない限りにおいて種々の変更が可能である。 <Other embodiments>
Although the embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications can be made without departing from the spirit of the present invention.

上記実施形態では、第１型枠１２及び第２型枠１３のそれぞれが凹部を有することとしたが、これに限られない。第１型枠１２及び第２型枠１３の一方には、凹部が形成されていなくてもよい。 In the above embodiment, each of the first mold 12 and the second mold 13 has a recess, but the present invention is not limited to this. A recess may not be formed in one of the first mold 12 and the second mold 13.

１０金型
１１型枠
１２第１型枠
１２ａ表面
Ａ１第１端
Ａ２第２端
１２ｃ第１側面
１２ｄ第２側面
１３第２型枠
１３ａ表面
１３ｃ第１側面
１３ｄ第２側面
１４注入口
１５排出口
１６内部空間
１７離型剤
１８離型剤
２０回転ブラシ
２１軸部
２２毛部
ＡＸ軸心
Ｐ１第１位置
Ｐ２第２位置
Ｄ１，Ｄ２移動方向
Ｅ１，Ｅ２回転方向 10 Mold 11 Formwork 12 1st formwork 12a Surface A1 1st end A2 2nd end 12c 1st side surface 12d 2nd side surface 13 2nd mold 13a Surface 13c 1st side surface 13d 2nd side surface 14 Injection port 15 Outlet 16 Internal space 17 Release agent 18 Release agent 20 Rotation brush 21 Shaft part 22 Hair part AX Axial center P1 First position P2 Second position D1, D2 Movement direction E1, E2 Rotation direction

Claims

A method for cleaning a mold having a surface on which a recess for injecting a molding slurry is formed.
A brushing step of brushing the surface of the mold with a rotating brush that rotates about the axis is provided.
In the brushing step, when viewed from a direction parallel to the axis, from the first position set outside the first end of the surface of the mold to the outside of the second end of the surface of the mold. Move the axis to the set second position,
How to clean the formwork.

The surface of the formwork
A first parallel surface that is substantially parallel to the moving direction of the axis, is connected to the outer edge of the recess, and includes the first end.
A second parallel surface that is substantially parallel to the moving direction, is connected to the outer edge of the recess, and includes the second end.
A third parallel surface that is substantially parallel to the moving direction and is the bottom surface of the recess.
A first slope connected to the first parallel surface and the third parallel surface,
A second slope connected to the second parallel plane and the third parallel plane,
including,
The method for cleaning the mold according to claim 1.

When the axis is moved to the right along at least one of the first to third parallel planes, the rotating brush is rotated counterclockwise.
The method for cleaning the mold according to claim 2.

When the axis is moved to the right along at least one of the first to third parallel planes, the rotating brush is rotated to the right.
The method for cleaning the mold according to claim 2.

When the axial center is moved to the right along the first slope, the rotating brush is rotated counterclockwise.
The method for cleaning the mold according to claim 3 or 4.

When the axial center is moved to the right along the first slope, the rotating brush is rotated to the right.
The method for cleaning the mold according to claim 3 or 4.

When moving the axis to the right along the second slope, the rotating brush is rotated counterclockwise.
The method for cleaning the mold according to any one of claims 2 to 6.

When the axial center is moved to the right along the second slope, the rotating brush is rotated to the right.
The method for cleaning the mold according to any one of claims 2 to 6.

It said rotary brush comprises a shaft portion for rotation about said axis, and a hair portion composed of a plurality of bristles extending radially from the shaft portion,
The method for cleaning the mold according to any one of claims 1 to 8.

The rockwell hardness of the plurality of brush bristles at 60 ° C. is 70 or more and 100 or less.
The method for cleaning the mold according to claim 9 .

The flexural modulus (MPa) of the plurality of brush bristles at 60 ° C. is 2000 or more and 4000 or less.
The method for cleaning the mold according to claim 9 or 10 .

In the brushing step, when the rotating brush is located at the first position, the bristles come into contact with the first side surface of the mold which is continuous with the surface of the mold at the first end.
The method for cleaning the mold according to any one of claims 9 to 11 .

In the brushing step, when the rotating brush is located at the second position, the bristles come into contact with the second side surface of the mold which is continuous with the surface of the mold at the second end.
The method for cleaning the mold according to any one of claims 9 to 12 .

Prior to the brushing step, a preheating step of immersing the mold in a cleaning liquid of 30 ° C. or higher and 80 ° C. or lower is further provided.
The method for cleaning a mold according to any one of claims 1 to 13.

A method for cleaning a mold having a surface on which a recess for injecting a molding slurry is formed.
A brushing step of brushing the surface of the mold with a rotating brush that rotates about the axis is provided.
The surface of the mold is substantially parallel to the moving direction of the axis, is connected to the outer edge of the recess, and is substantially parallel to the first parallel surface including the first end, and is substantially parallel to the moving direction of the recess. A second parallel surface that is continuous with the outer edge and includes the second end, a third parallel surface that is substantially parallel to the moving direction and is the bottom surface of the recess, and the first parallel surface and the third parallel surface. Includes a continuous first slope and a second slope connected to the second parallel plane and the third parallel plane.
In the brushing step, when viewed from a direction parallel to the axis, from the first position set outside the first end of the surface of the mold to the outside of the second end of the surface of the mold. Move the axis to the set second position,
In the brushing step, the moving speed of the axial center above the first slope is made slower than the moving speed of the axial center above the first parallel surface.
How to clean the formwork.

The average moving speed of the axis above the first slope is made 1.1 times or more the average moving speed of the axis above the first parallel surface.
The method for cleaning the mold according to claim 15.

Stop the rotating brush on the first slope,
The method for cleaning the mold according to claim 15 or 16.

A method for cleaning a mold having a surface on which a recess for injecting a molding slurry is formed.
A brushing step of brushing the surface of the mold with a rotating brush that rotates about the axis is provided.
The surface of the mold is substantially parallel to the moving direction of the axis, is connected to the outer edge of the recess, and is substantially parallel to the first parallel surface including the first end, and is substantially parallel to the moving direction of the recess. A second parallel surface that is continuous with the outer edge and includes the second end, a third parallel surface that is substantially parallel to the moving direction and is the bottom surface of the recess, and the first parallel surface and the third parallel surface. Includes a continuous first slope and a second slope connected to the second parallel plane and the third parallel plane.
In the brushing step, when viewed from a direction parallel to the axis, from the first position set outside the first end of the surface of the mold to the outside of the second end of the surface of the mold. Move the axis to the set second position,
In the brushing step, the moving speed of the axial center above the second slope is made slower than the moving speed of the axial center above the third parallel surface.
How to clean the formwork.

Make the average moving speed of the axis above the second slope 1.1 times or more the average moving speed of the axis above the third parallel plane.
The method for cleaning the mold according to claim 18.

Stop the rotating brush on the second slope,
The method for cleaning the mold according to claim 18 or 19.

A method for cleaning a mold having a surface on which a recess for injecting a molding slurry is formed.
A brushing step of brushing the surface of the mold with a rotating brush that rotates about the axis is provided.
In the brushing step, when viewed from a direction parallel to the axis, from the first position set outside the first end of the surface of the mold to the outside of the second end of the surface of the mold. While moving the axis to the set second position, the surface of the mold and the inner surface of the recess are brushed with the rotating brush.
How to clean the formwork.

A step of cleaning the mold by the method of cleaning the mold according to any one of claims 1 to 21.
The process of assembling the mold using the mold and
The step of injecting the molding slurry into the mold and
A process of molding a ceramic molded product by solidifying the injected molding slurry, and
A method for manufacturing a ceramic molded product.