JPH06143237A - Method for manufacturing ceramic bend pipe - Google Patents
Method for manufacturing ceramic bend pipeInfo
- Publication number
- JPH06143237A JPH06143237A JP41880790A JP41880790A JPH06143237A JP H06143237 A JPH06143237 A JP H06143237A JP 41880790 A JP41880790 A JP 41880790A JP 41880790 A JP41880790 A JP 41880790A JP H06143237 A JPH06143237 A JP H06143237A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- ceramic
- fired
- molded
- fired body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/003—Apparatus or processes for treating or working the shaped or preshaped articles the shaping of preshaped articles, e.g. by bending
- B28B11/005—Using heat to allow reshaping, e.g. to soften ceramic articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/003—Apparatus or processes for treating or working the shaped or preshaped articles the shaping of preshaped articles, e.g. by bending
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
(57)【要約】
〔目的〕 直管形状のセラミックパイプに曲げ加工（塑
性加工）を施して、配管構成材として有用なエルボウ管
やＵ字管等のベンド管に成形する。
〔構成〕 遠心力泥しょう鋳込み成形法により成形され
た、粒径１μｍ以下のセラミック粒子からなる中空筒状
成形体を焼成処理して焼成体とし、焼成体の中空孔内に
耐火物ビーズを充填し、加熱下に曲げ荷重を加えて焼成
体に塑性変形を生じさせる。
(57) [Abstract] [Purpose] A straight ceramic pipe is bent (plasticized) to form a bend pipe such as an elbow pipe or a U-shaped pipe that is useful as a piping component. [Constitution] A hollow cylindrical molded body made of ceramic particles having a particle diameter of 1 μm or less, which is molded by centrifugal force sludge casting, is fired to be a fired body, and the refractory beads are filled in the hollow holes of the fired body. Then, a bending load is applied while heating to cause plastic deformation in the fired body.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、各種配管構成に使用さ
れるセラミックベント管の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a ceramic vent pipe used in various piping configurations.
【０００２】[0002]
【従来の技術】セラミック製品の製造方法としては、例
えば、セラミック粉末の混練物を冷間静水圧プレス法等
で所要形状の成形体に加圧成形し、その成形体を乾燥・
脱脂した後、焼成処理（焼成の前に仮焼を行うこともあ
る）する方法、またはセラミック粉末を水等に分散懸濁
させた泥しょう（スラリー）を石こう型に鋳込み、石こ
う型の吸水作用で型の表面に泥しょうを着肉させて成形
体を形成し、ついで成形体の乾燥・脱脂、および仮焼、
焼成処理を行う方法等が工業的に実施されている。2. Description of the Related Art As a method for producing a ceramic product, for example, a kneaded material of ceramic powder is pressure-molded by a cold isostatic pressing method or the like into a shaped body, and the shaped body is dried and dried.
After degreasing, a method of firing (sometimes calcining before firing), or pouring gypsum mold with slurry (slurry) in which ceramic powder is dispersed and suspended in water etc. To form a molded body by infiltrating mud on the surface of the mold, and then drying and degreasing the molded body, and calcination,
Methods such as firing treatment are industrially carried out.
【０００３】近時は、セラミックパイプを配管構成部材
とし、耐摩耗性、耐食性、耐熱性等が要求される使用環
境に応用することが提案されている。Recently, it has been proposed to use a ceramic pipe as a pipe constituent member and to apply it to a use environment where abrasion resistance, corrosion resistance, heat resistance and the like are required.
【０００４】[0004]
【発明が解決しようとする課題】配管構成には、直管形
状のパイプのほか、直管同士の接続等にＬ字型管やＵ字
型管等のベンド管が使用される。金属パイプの場合は、
直管を冷間もしくは熱間での塑性加工に付して目的とす
る曲げ形状のベンド管に仕上げることができるが、金属
と異なってセラミックは本質的に脆性材料であり、その
ような塑性加工によりベンド管を製造することは殆ど不
可能である。In addition to straight pipes, bend pipes such as L-shaped pipes and U-shaped pipes are used for connecting the straight pipes to each other. For metal pipes,
Although straight pipes can be subjected to cold or hot plastic working to finish bend pipes of the desired bending shape, unlike metals, ceramics are essentially brittle materials, and such plastic working It is almost impossible to manufacture a bend tube according to.
【０００５】このため、セラミックベント管は、冷間静
水圧プレスによるセラミック成形体の加圧成形におい
て、目的とするベンド管の形状に対応した型を使用して
曲げ形状を有する成形体を得、これを焼成処理する方法
により製造されている。For this reason, the ceramic vent pipe has a bent shape obtained by using a die corresponding to the shape of the desired bend pipe in the pressure forming of the ceramic formed body by cold isostatic pressing. It is manufactured by a method of baking this.
【０００６】しかし、ベンド管の曲げ形状は多岐に亘る
ので、上記の方法によるセラミックベント管の製造にお
いては、目的とするベンド管の形状に対応する多数の型
を用意しておかねばならず、極めて高価となる。また、
セラミック成形体は強度・剛性が低く、乾燥・脱脂を経
て焼成処理を完了するまでの過程で、変形・亀裂等の損
傷を伴い易いものであり、殊にベンド管のような異形状
成形体のハンドリング操作は、単純な直管形状の成形体
の場合に比べて著しく困難である。However, since the bend shape of the bend pipe is various, it is necessary to prepare a large number of molds corresponding to the intended shape of the bend pipe in the production of the ceramic vent pipe by the above method. It will be extremely expensive. Also,
Ceramic molded bodies have low strength and rigidity, and are liable to be damaged by deformation, cracks, etc. in the process from drying and degreasing to the completion of the firing process, especially for irregularly shaped molded bodies such as bend pipes. The handling operation is significantly more difficult than in the case of a simple straight tubular shaped body.
【０００７】本発明は上記問題を解決することを目的と
するものであり、塑性加工によりセラミックベント管を
製造する方法を提供する。The present invention aims to solve the above problems, and provides a method for producing a ceramic vent pipe by plastic working.
【０００８】[0008]
【課題を解決するための手段および作用】本発明のセラ
ミックベント管の製造方法は、遠心力泥しょう鋳込み成
形法により成形された、粒径１μｍ以下のセラミック粒
子からなる直管形状のセラミック成形体を焼成し、その
焼成体の中空孔内に耐火物ビーズを充填したうえ、焼成
体を加熱下に曲げ加工することを特徴としている。以下
本発明について詳しく説明する。[Means and Actions for Solving the Problems] A method for producing a ceramic vent pipe according to the present invention is a straight pipe-shaped ceramic molded body made of ceramic particles having a particle diameter of 1 μm or less, which is molded by a centrifugal force slurry casting method. Is fired, the refractory beads are filled in the hollow holes of the fired body, and the fired body is bent while being heated. The present invention will be described in detail below.
【０００９】本発明は、遠心力泥しょう鋳込み成形法に
より成形される直管形状のセラミック成形体を焼成処理
し、その焼成体をベンド管の素管とする。According to the present invention, a straight pipe-shaped ceramic molded body molded by the centrifugal force mud casting method is fired, and the fired body is used as a bend pipe.
【００１０】図３は遠心力泥しょう鋳込み成形を模式的
に示している。（１０）は中空円筒形状を有する石こう
型であり、両端開口部は鋳込み孔（１２）を有する蓋材
（１１）が着脱可能に取付けられている。石こう型（１
０）は、回転駆動装置、例えばターニングローラ（図示
せず）により、自身の水平軸心を中心とする回転運動が
与えられる。石こう型（１０）の回転運動下にホッパ
（２０）から型内に鋳込まれたセラミック泥しょう
（Ｓ）は遠心力の作用で石こう型（１０）の内周面に一
様な層厚をなして押付けられ、その状態で石こう型の吸
水作用による着肉が進行し、着肉層として中空円筒形状
のセラミック成形体（Ｇ）が形成される。FIG. 3 schematically shows centrifugal mud casting. (10) is a gypsum type having a hollow cylindrical shape, and a lid member (11) having a casting hole (12) is detachably attached to both end openings. Gypsum type (1
0) is given a rotary motion about its own horizontal axis by a rotary drive device, for example, a turning roller (not shown). The ceramic sludge (S) cast into the mold from the hopper (20) under the rotary motion of the gypsum mold (10) has a uniform layer thickness on the inner peripheral surface of the gypsum mold (10) by the action of centrifugal force. After that, it is pressed, and in this state, the gypsum-shaped water absorption action progresses the infiltration, and a hollow cylindrical ceramic molded body (G) is formed as an infiltration layer.
【００１１】遠心力泥しょう鋳込み成形法を適用するこ
ととしたのは、成形体の均質性を確保するためである。
他の成形法、例えば冷間静水圧プレス法では、セラミッ
ク粉末と型との接触界面の摩擦や粒子同士の摩擦のた
め、成形体の表面層と肉厚内部とに粗密の偏りを生じる
が、遠心力泥しょう鋳込み成形法においては、石こう型
の回転速度により決まる一定の遠心力の作用下に泥しょ
うの着肉が進行するので、実質的に粗密の偏りのない成
形体を得ることができる。また、着肉過程における遠心
力の作用で、気泡、その他の懸濁異物の比重分離が行わ
れ、成形体の健全性が高められる。またセラミック粉末
として粒径１μｍ以下の極微細粒子に限定したのは、セ
ラミックパイプ（焼成体）に微細結晶粒組織をもたせる
ためである。上記成形体の均質性、緻密性、および微細
粒構造は、その後に行われるパイプ（焼結体）の塑性加
工の成否を左右する重要な要因の１つである。The reason why the centrifugal mud casting method is applied is to ensure the homogeneity of the molded product.
In other molding methods, for example, cold isostatic pressing method, due to the friction of the contact interface between the ceramic powder and the mold or the friction between the particles, the surface layer of the molded body and the unevenness of the density are generated in the inside of the wall thickness, In the centrifugal sludge casting method, since the infiltration of the mud progresses under the action of a constant centrifugal force determined by the rotating speed of the gypsum mold, it is possible to obtain a molded body that is substantially dense and uneven. . Further, due to the action of the centrifugal force in the inking process, air bubbles and other suspended foreign matter are separated by specific gravity, and the soundness of the molded product is enhanced. Further, the reason why the ceramic powder is limited to ultrafine particles having a particle size of 1 μm or less is that the ceramic pipe (fired body) has a fine crystal grain structure. The homogeneity, denseness, and fine-grained structure of the molded body are one of the important factors that determine the success or failure of the plastic working of the pipe (sintered body) performed thereafter.
【００１２】上記遠心力泥しょう鋳込み成形に供される
泥しょうは、常法に従って水等を分散媒としてセラミッ
ク粉末を適宜濃度（例えば水分量１０〜５０重量％）に
混合して調製され、必要に応じて解膠剤、成形助剤、焼
結助剤（例えば、Ｍｇｏ，ＣａＯ，ＢａＯ）等が少量添
加されることも通常のそれと異ならない。The slurry to be subjected to the centrifugal force cast molding is prepared by mixing the ceramic powder in an appropriate concentration (for example, water content of 10 to 50% by weight) with water or the like as a dispersion medium according to a conventional method. It is no different from usual that a peptizer, a molding aid, a sintering aid (for example, Mgo, CaO, BaO) or the like is added in a small amount according to the above.
【００１３】鋳込み成形条件に特別の制限はなく、例え
ば石こう型の回転速度は、石こう型の内面に泥しょうが
一様に押付けられた状態を安定に保持し得る程度の遠心
力（例えば重力倍数：約１０Ｇ以上、型の内表面上）と
なるように制御すればよい。もっとも、回転速度を高め
て遠心力を強化し、例えば重力倍数約５０〜１００Ｇの
遠心力を作用させることは、成形体を一層高緻密質化す
ることができる点で好ましいことである。There are no particular restrictions on the casting conditions, and for example, the rotation speed of the gypsum mold is such that centrifugal force (for example, gravity multiple: It may be controlled so that the inner surface of the mold is about 10 G or more. However, it is preferable to increase the rotation speed to strengthen the centrifugal force, and to apply a centrifugal force of, for example, a gravity multiple of about 50 to 100 G from the viewpoint that the compact can be made even more dense.
【００１４】また石こう型内に形成された中空円筒形状
のセラミック成形体の抜型、およびその後の乾燥・脱
脂、仮焼、焼成等の一連の処理工程も、セラミックの材
質に応じて常法に従って行えばよい。Further, the hollow cylindrical ceramic molded body formed in the gypsum mold is removed from the die, and a series of subsequent processing steps such as drying / degreasing, calcination, and firing are performed according to a conventional method depending on the ceramic material. I'll do it.
【００１５】上記工程を経て得られたセラミックパイプ
焼成体（直管）は、均質、緻密性が高く、また微細結晶
粒組織を有しているので、変形抵抗が低く、粒界分離や
キャビディ発生等を伴わずに塑性加工を行うことが可能
である。The ceramic pipe fired body (straight tube) obtained through the above steps has a high homogeneity and a high density and has a fine crystal grain structure, so that the deformation resistance is low, and grain boundary separation and cavitation occur. It is possible to perform plastic working without involving the above.
【００１６】セラミックパイプ焼成体（直管）は、必要
に応じ管径サイズを調整するための機械加工が施された
後、その中空孔内に耐火物ビーズが充填され、加熱保持
状態のもとで曲げ加工が加えられる。The fired ceramic pipe (straight pipe) is machined to adjust the diameter of the pipe as necessary, and then the refractory beads are filled in the hollow holes of the fired body. Bending is added at.
【００１７】図１はその曲げ加工状態を、図２は曲げ加
工装置の例をそれぞれ模式的に示している。（Ａ′）は
曲げ加工前の直管形状のセラミックパイプ焼成体、
（Ａ）は曲げ加工が加えられたセラミックパイプ焼成体
であり、（３０）はセラミックパイプの中空孔内に充填
された耐火物ビーズである。（４０）（４０）はセラミ
ックパイプ焼成体の載置台であり、載置台（４０）（４
０）は適宜間隔を置いて左右に向い合っている。（５
０）は、セラミックパイプ焼成体に、曲げ荷重を加える
ための押圧部材である。図示の例においては、載置台
（４０）（４０）を、セラミックパイプ焼成体の管軸を
含む垂直面内で傾動自在なように支柱（４１）（４１）
で支承して基台（４２）（４２）に設置した構成とし、
それによりセラミックパイプ焼成体を、曲げ加工の開始
から完了に到るまでの間、面接触状態を以て担持し得る
ようにしている。また、押圧部材（５０）についても、
点接触とならないようにその表面の周方向に丸溝（５
１）を形成している。FIG. 1 schematically shows the bending state, and FIG. 2 schematically shows an example of the bending apparatus. (A ') is a straight pipe-shaped ceramic pipe fired body before bending,
(A) is a ceramic pipe fired body that has been subjected to bending, and (30) is refractory beads filled in the hollow holes of the ceramic pipe. (40) (40) is a mounting table for the ceramic pipe fired body, and the mounting table (40) (4
0) faces left and right at appropriate intervals. (5
Reference numeral 0) is a pressing member for applying a bending load to the ceramic pipe fired body. In the illustrated example, the mounting tables (40) (40) are supported by tiltable columns (41) (41) so as to be tiltable in a vertical plane including the tube axis of the ceramic pipe fired body.
And installed on the base (42) (42),
As a result, the ceramic pipe fired body can be supported in a surface contact state from the start to the completion of bending. Also, regarding the pressing member (50),
Round groove (5
1) is formed.
【００１８】セラミックパイプに曲げ加工を施すに当た
って、その中空孔内に耐火物ビーズを充填することとし
たのは、パイプに加えられる曲げ荷重の局部集中を緩和
して塑性変形を無理なく生起させ、曲げ部分の扁平化や
クラック発生等を未然に防止するためである。その耐火
物ビーズ（４０）はパイプの曲げ加工温度域において安
定で流動性を呈し、かつパイプを内側から支え得る適度
な変形抵抗を有するものが使用され、その例として、粒
径約１〜１０ｍｍ程度のムライトビーズ、アルミナビー
ズ、ジルコニアビーズ等が挙げられる。When the ceramic pipe is bent, the refractory beads are filled in the hollow holes of the ceramic pipe so that the local concentration of the bending load applied to the pipe is relaxed and the plastic deformation is naturally generated. This is to prevent flattening of the bent portion and occurrence of cracks. As the refractory beads (40), those having stable and fluidity in the bending temperature range of the pipe and having an appropriate deformation resistance capable of supporting the pipe from the inside are used, for example, a particle diameter of about 1 to 10 mm. Examples include mullite beads, alumina beads, zirconia beads, and the like.
【００１９】上記曲げ加工は、好ましくは温度：約１３
００〜１５５０℃の領域において行なわれる。約１３０
０℃より低い温度域では、塑性変形を生じさせることが
不可能でないにしても、工業的に実用し得る曲げ加工の
実施が困難となり、また１５５０℃を越えると、セラミ
ック焼成体の組織に好ましくない変化（ガラス化等）
や、軟化による形くずれ等の不具合を生じることになる
からである。The bending is preferably performed at a temperature of about 13
It is carried out in the region of 00 to 1550 ° C. About 130
In the temperature range lower than 0 ° C, it is difficult to carry out the bending process which is industrially practical, even if it is not possible to cause plastic deformation, and when it exceeds 1550 ° C, the structure of the ceramic fired body is preferable. No change (vitrification, etc.)
In addition, a problem such as deformation due to softening may occur.
【００２０】曲げ加工に必要な押圧荷重、および押圧荷
重の作用下に直管形状から所要の曲げ形状に塑性変形さ
せるに要する時間等は、セラミックパイプの材質や、管
径、肉厚等により異なるが、押圧荷重は概ね１０〜３０
０Ｋｇであり、加工所要時間は約０．５〜１０時間であ
る。その歪み速度は、およそ１×１０−４〜１０×１０
−４Ｓ程度である。上記のように曲げ加工の開始から完
了までに比較的長い時間を要するので、曲げ加工は加熱
源を有する炉（抵抗加熱炉等）内において行うのがよ
い。なお、曲げ加工完了後のセラミックパイプ（ベンド
管）の冷却は、熱応力によるクラックの発生を防止する
ために緩徐とするべきであり、好ましくは炉中にて常温
近くまで冷却する。The pressing load required for bending and the time required for plastically deforming the straight pipe shape to the required bending shape under the action of the pressing load vary depending on the material of the ceramic pipe, the pipe diameter, the wall thickness and the like. However, the pressing load is about 10-30
The processing time is about 0.5 to 10 hours. The strain rate is about 1 × 10 −4 to 10 × 10.
It is about -4 S. Since it takes a relatively long time from the start to the completion of bending as described above, it is preferable to perform the bending in a furnace having a heating source (a resistance heating furnace or the like). Note that the cooling of the ceramic pipe (bend pipe) after completion of bending should be slow in order to prevent the generation of cracks due to thermal stress, and is preferably cooled to near room temperature in the furnace.
【００２１】[0021]
（１）遠心力泥しょう鋳込み成形 泥しょう アルミナ粉末とジルコニア粉末の混合物（Ａｌ２Ｏ３：
ＺｒＯ３＝８０：２０，重量比）１００重量部を水１８
重量部と混合し、これに成形助剤（メチルセルロース系
粘結剤）（商品名：セルナＷＥ５１８，中京油脂（株）
製）０．３重量部を加えると共に、解膠剤（ＨＣｌ＋Ｍ
ｇＦ２）を添加してｐＨ４．０に調整したうえ、ボール
ミルで２４時間混練。粉末粒径：１．０μｍ以下。上記
泥しょうを遠心力鋳込み成形に付し、直管形状のセラミ
ックパイプ成形体を成形した。回転速度：６６８ｒｐｍ
（石こう型表面上の遠心力：１５Ｇ）、回転時間：１Ｈ
ｒ。(1) Centrifugal Slurry Casting Mixture A mixture of alumina powder and zirconia powder (Al 2 O 3 :
ZrO 3 = 80: 20, weight ratio) 100 parts by weight of water 18
Mixing with parts by weight, and a molding aid (methyl cellulose binder) (trade name: Serna WE518, Chukyo Yushi Co., Ltd.)
0.3 part by weight, and a peptizer (HCl + M
gF 2 ) was added to adjust the pH to 4.0, and the mixture was kneaded with a ball mill for 24 hours. Powder particle size: 1.0 μm or less. The sludge was subjected to centrifugal force casting to form a straight pipe-shaped ceramic pipe molded body. Rotation speed: 668 rpm
(Centrifugal force on the gypsum surface: 15G), rotation time: 1H
r.
【００２２】（２）成形体の焼成処理 上記成形体を、５０℃で乾燥脱脂したのち、抵抗加熱炉
中、１００℃で１時間を要して仮焼し、ついでガス炉
中、１６００℃で１時間を要して焼成処理した。(2) Baking treatment of molded body The above molded body is dried and degreased at 50 ° C., then calcined in a resistance heating furnace at 100 ° C. for 1 hour, and then in a gas furnace at 1600 ° C. The calcination process took 1 hour.
【００２３】（３）セラミックパイプ焼成体の曲げ加工 上記直管形状の焼成体（外径：５０ｍｍ，肉厚：４ｍ
ｍ，長さ６００ｍｍ，機械加工後）を素管とし、その中
空孔内にムライトビーズ（粒径：約５ｍｍ）を充填した
うえ、抵抗加熱炉中、図１に示すように素管（Ａ′）を
載置台（４２）（４２）（２つの載置台の離隔距離：４
００ｍｍ）に架け渡して載置し、下記条件下に曲げ塑性
加工を行ってベンド管を得る。塑性加工完了後、炉中に
て常温近くまで冷却し、炉外に取出した後、中空孔内の
ムライトビーズを排除した。 加工温度：１５５０℃ 曲げ荷重：１２Ｋｇ 曲げ角度：９０゜ 加工時間：２Ｈｒ。(3) Bending of ceramic pipe fired body The above straight tube-shaped fired body (outer diameter: 50 mm, wall thickness: 4 m)
m, length 600 mm, after machining) was used as a raw tube, and the hollow holes were filled with mullite beads (particle size: about 5 mm). Then, in a resistance heating furnace, as shown in FIG. ) Mounting table (42) (42) (distance between two mounting tables: 4
(00 mm) and placed, and bending plastic working is performed under the following conditions to obtain a bend pipe. After the plastic working was completed, it was cooled to near room temperature in the furnace, taken out of the furnace, and then the mullite beads in the hollow holes were removed. Processing temperature: 1550 ° C. Bending load: 12 Kg Bending angle: 90 ° Processing time: 2 Hr.
【００２４】（４）ベンド管の品質 上記で得られたベンド管（９０゜エルボウ管）は、クラ
ック等の発生はなく（目視観察および液体浸透探傷法に
よる）、また曲げ加工部の真円度は約０．５ｍｍと良好
であり、配管材として十分に満足し得る品質を有してい
る。(4) Quality of bend pipe The bend pipe (90 ° elbow pipe) obtained above does not have cracks (by visual observation and liquid penetrant inspection), and the roundness of the bent portion is good. Is as good as about 0.5 mm and has a sufficiently satisfactory quality as a piping material.
【００２５】[0025]
【発明の効果】本発明方法によれば直管形状のセラミッ
クパイプを、塑性加工によりエルボウ管、Ｕ字管、その
他の各種形状を有するベンド管に成形することができる
ので、従来のように多種類の成形型を用意して目的とす
るベンド管に対応する形状のセラミックパイプ成形体を
加圧成形していた方法と異なって、工程の簡素化、コス
ト低減、効率向上等に大きな効果を得ることができる。According to the method of the present invention, a straight pipe-shaped ceramic pipe can be formed into an elbow pipe, a U-shaped pipe, or a bend pipe having various other shapes by plastic working. Unlike the method in which different types of molds are prepared and a ceramic pipe molded body having a shape corresponding to the intended bend pipe is pressure-molded, great effects can be obtained in simplifying the process, reducing costs, improving efficiency, etc. be able to.
【図１】本発明によるセラミックパイプの曲げ塑性加工
の実施例を示す模式的説明図である。FIG. 1 is a schematic explanatory view showing an embodiment of bending plastic working of a ceramic pipe according to the present invention.
【図２】本発明によるセラミックパイプの曲げ加工装置
の実施例を示す模式的説明図である。FIG. 2 is a schematic explanatory view showing an embodiment of a bending apparatus for a ceramic pipe according to the present invention.
【図３】遠心力泥しょう鋳込み成形法の説明図である。FIG. 3 is an explanatory view of a centrifugal force cast molding method.
１０ 石こう型、３０ 耐火物ビーズ、４０ セラミッ
クパイプ載置台、５０曲げ加工治具。10 gypsum type, 30 refractory beads, 40 ceramic pipe mounting table, 50 bending jig.
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成４年１０月１５日[Submission date] October 15, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】発明の名称[Name of item to be amended] Title of invention
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【発明の名称】 セラミックベンド管の製造方法Method of manufacturing a ceramic Ben de tube [Title of the Invention]
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Name of item to be amended] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【特許請求の範囲】[Claims]
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００１[Correction target item name] 0001
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００１】[0001]
【産業上の利用分野】本発明は、各種配管構成に使用さ
れるセラミックベンド管の製造方法に関する。The present invention relates to a method for producing a ceramic Bend tube used in various pipes configuration.
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００５[Name of item to be corrected] 0005
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００５】このため、セラミックベンド管は、冷間静
水圧プレスによるセラミック成形体の加圧成形におい
て、目的とするベンド管の形状に対応した型を使用して
曲げ形状を有する成形体を得、これを焼成処理する方法
により製造されている。[0005] Therefore, ceramic Bend tube, resulting in pressure molding of the ceramic body by cold isostatic pressing, a molded body having a shape bent using the mold corresponding to the shape of the bent pipe for the purpose It is manufactured by a method of baking it.
【手続補正５】[Procedure Amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００６[Correction target item name] 0006
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００６】しかし、ベンド管の曲げ形状は多岐に亘る
ので、上記の方法によるセラミックベンド管の製造にお
いては、目的とするベンド管の形状に対応する多数の型
を用意しておかねばならず、極めて高価となる。また、
セラミック成形体は強度・剛性が低く、乾燥・脱脂を経
て焼成処理を完了するまでの過程で、変形・亀裂等の損
傷を伴い易いものであり、殊にベンド管のような異形状
成形体のハンドリング操作は、単純な直管形状の成形体
の場合に比べて著しく困難である。However, since the bent shape of the bent pipe are manifold, in the manufacture of ceramic Bend tube according to the above method, not must keep in preparing many types corresponding to the shape of the bent pipe for the purpose , Very expensive. Also,
Ceramic molded bodies have low strength and rigidity, and are liable to be damaged by deformation, cracks, etc. in the process from drying and degreasing to the completion of the firing process, especially for irregularly shaped molded bodies such as bend pipes. The handling operation is significantly more difficult than in the case of a simple straight tubular shaped body.
【手続補正６】[Procedure correction 6]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００７[Correction target item name] 0007
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００７】本発明は上記問題を解決することを目的と
するものであり、塑性加工によりセラミックベンド管を
製造する方法を提供する。[0007] The present invention is aimed at solving the aforementioned problems, it provides a method for producing a ceramic Bend tube by plastic working.
【手続補正７】[Procedure Amendment 7]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００８[Correction target item name] 0008
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００８】[0008]
【課題を解決するための手段および作用】本発明のセラ
ミックベンド管の製造方法は、遠心力泥しょう鋳込み成
形法により成形された、粒径１μm 以下のセラミック粒
子からなる直管形状のセラミック成形体を焼成し、その
焼成体の中空孔内に耐火物ビーズを充填したうえ、焼成
体を加熱下に曲げ加工することを特徴としている。以下
本発明について詳しく説明する。Method for producing a ceramic Bend pipe SUMMARY and effects of the Invention The present invention is molded by centrifugal force Slip casting method, the ceramic molded straight tube shape consisting of ceramic particles with particle sizes of 1μm It is characterized in that the body is fired, the refractory beads are filled in the hollow holes of the fired body, and the fired body is bent while being heated. The present invention will be described in detail below.
Claims (1)
された、粒径１μｍ以下のセラミック粒子からなる直管
形状のセラミソク成形体を焼成し、その焼成体の中空孔
内に耐火物ビーズを充填したうえ、焼成体を加熱下に曲
げ加工することを特徴とするセラミックベント管の製造
方法。1. A straight-tube-shaped ceramic molded body made of ceramic particles having a particle diameter of 1 μm or less, which is molded by a centrifugal force casting method, is fired, and refractory beads are filled in the hollow holes of the fired body. In addition, a method for manufacturing a ceramic vent pipe, which comprises bending the fired body under heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP41880790A JPH06143237A (en) | 1990-12-27 | 1990-12-27 | Method for manufacturing ceramic bend pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP41880790A JPH06143237A (en) | 1990-12-27 | 1990-12-27 | Method for manufacturing ceramic bend pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06143237A true JPH06143237A (en) | 1994-05-24 |
Family
ID=18526585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP41880790A Pending JPH06143237A (en) | 1990-12-27 | 1990-12-27 | Method for manufacturing ceramic bend pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06143237A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008105933A (en) * | 2006-09-28 | 2008-05-08 | Kyocera Corp | Hollow bodies, buoyancy materials, diving equipment and floats for molten metal |
| WO2010004819A1 (en) * | 2008-07-09 | 2010-01-14 | 東レ株式会社 | Salt water desalination equipment using reverse osmosis membrane, and method for producing desalinated water using salt water desalination equipment |
| CN108947497A (en) * | 2018-08-16 | 2018-12-07 | 娄底市安地亚斯电子陶瓷有限公司 | A kind of sintering forming process of tubular ceramic |
-
1990
- 1990-12-27 JP JP41880790A patent/JPH06143237A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008105933A (en) * | 2006-09-28 | 2008-05-08 | Kyocera Corp | Hollow bodies, buoyancy materials, diving equipment and floats for molten metal |
| WO2010004819A1 (en) * | 2008-07-09 | 2010-01-14 | 東レ株式会社 | Salt water desalination equipment using reverse osmosis membrane, and method for producing desalinated water using salt water desalination equipment |
| CN108947497A (en) * | 2018-08-16 | 2018-12-07 | 娄底市安地亚斯电子陶瓷有限公司 | A kind of sintering forming process of tubular ceramic |
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