JPH0129682B2 - - Google Patents
Info
- Publication number
- JPH0129682B2 JPH0129682B2 JP9993883A JP9993883A JPH0129682B2 JP H0129682 B2 JPH0129682 B2 JP H0129682B2 JP 9993883 A JP9993883 A JP 9993883A JP 9993883 A JP9993883 A JP 9993883A JP H0129682 B2 JPH0129682 B2 JP H0129682B2
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- nozzle
- extruder
- stage
- nozzles
- 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.)
- Expired
Links
- 239000000919 ceramic Substances 0.000 claims description 40
- 239000002994 raw material Substances 0.000 claims description 26
- 239000002131 composite material Substances 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 238000005245 sintering Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 description 4
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Description
【発明の詳細な説明】
本発明は、複数層のセラミツクスからなる複合
セラミツクス管の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a composite ceramic tube made of multiple layers of ceramics.
一部のセラミツクスは、金属よりも耐食、耐
熱、耐磨耗性に優れているため、化学プラントの
配管等に使用することが考えられている。ところ
で、このようなセラミツクス管は、管全体を耐食
性、耐熱性、あるいは耐磨耗性に優れたセラミツ
クスにより製作する必要はない。例えば、耐熱性
を有する管を作る場合、２層のセラミツクスから
なる複合セラミツクス管とし、内周面側に耐熱性
に優れたセラミツクスを、また外周面側に断熱性
に優れたセラミツクスを用いれば、熱放散も少な
くて熱エネルギーのロスがなく、経済的である。
また例えば、内燃機関のシリンダライナは、燃焼
温度を上げかつライナ面からの熱放散を少くする
ために、シリンダライナ内面に耐熱性及び耐磨耗
性に優れたSi3N4等のセラミツクスを用い、その
外周側に断熱性に優れたZrO2等のセラミツクス
を用い、その外周側を金属製とすることが提案さ
れているが、このような構成は、金属製のシリン
ダライナに複合セラミツクス管を内嵌させること
により実現できる。しかしながら、このような複
合セラミツクス管は製造が非常に困難であり、従
来このような複合セラミツクス管を量産できる製
造方法は存在しなかつた。 Some ceramics have better corrosion resistance, heat resistance, and abrasion resistance than metals, so they are being considered for use in chemical plant piping and the like. Incidentally, such a ceramic tube does not need to be made entirely of ceramic having excellent corrosion resistance, heat resistance, or abrasion resistance. For example, when making a tube with heat resistance, if you use a composite ceramic tube consisting of two layers of ceramics, and use ceramics with excellent heat resistance on the inner circumference side and ceramics with excellent heat insulation properties on the outer circumference side, It is economical as it has little heat dissipation and no thermal energy loss.
For example, cylinder liners for internal combustion engines use ceramics such as Si 3 N 4 , which has excellent heat resistance and wear resistance, on the inner surface of the cylinder liner in order to increase the combustion temperature and reduce heat dissipation from the liner surface. It has been proposed to use ceramics such as ZrO 2 , which has excellent heat insulation properties, on the outer circumferential side of the cylinder, and to make the outer circumferential side of the metal cylinder liner. This can be achieved by fitting inside. However, such composite ceramic tubes are extremely difficult to manufacture, and conventionally there has been no manufacturing method that can mass-produce such composite ceramic tubes.
本発明は上記の点に鑑み、複合セラミツクス管
を容易に量産できる複合セラミツクス管の製造方
法を提供することを目的とする。 In view of the above points, it is an object of the present invention to provide a method for manufacturing a composite ceramic tube that allows mass production of composite ceramic tubes with ease.
上記目的を達成するため、本発明の複合セラミ
ツクス管の製造方法は、セラミツクスの生材料を
押出成形するためのノズルを各々有しかつこれら
ノズルが一直線上に配置された複数段の押出機
と、前記ノズルの全部を同心状に貫通する芯金棒
とを用いて、初段の押出機に供給された生材料を
初段のノズルから芯金棒に外嵌した状態で連続的
に押し出し、次段以降の押出機に供給された生材
料を次段以降のノズルからその前段のノズルによ
り管状に形成された生材料に外嵌した状態で順次
連続的に押し出し、かくして連続的に得られる複
数層の生材料からなる管を切断機により所定長さ
に切断し、これを焼結機により焼結する構成であ
る。 In order to achieve the above object, the method for manufacturing a composite ceramic tube of the present invention includes a multi-stage extruder, each having a nozzle for extrusion molding a raw ceramic material, and in which these nozzles are arranged in a straight line; The raw material supplied to the first-stage extruder is continuously extruded from the first-stage nozzle with a core metal rod that passes concentrically through all of the nozzles, and is then extruded from the next stage onwards. The raw material supplied to the machine is sequentially and continuously extruded from the nozzles of the next and subsequent stages while being fitted onto the raw material formed into a tube shape by the nozzle of the previous stage, and from the raw material of multiple layers continuously obtained in this way. The tube is cut into a predetermined length using a cutting machine and then sintered using a sintering machine.
かかる構成によれば、セラミツクスの生材料か
らなる複数層の管を連続的に得られ、これを切断
して焼結するだけで複合セラミツクス管を得るこ
とができるので、複合セラミツクス管を容易に量
産できる。 According to this configuration, multiple layers of tubes made of raw ceramic materials can be continuously obtained, and composite ceramic tubes can be obtained by simply cutting and sintering the tubes, making it easy to mass-produce composite ceramic tubes. can.
以下、本発明の一実施例について、図面に基づ
いて説明する。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図において、１ａ〜１ｃは高圧真空スクリ
ユー式の押出機であり、これら押出機１ａ〜１ｃ
を貫通して芯金棒２が配置されている。この芯金
棒２は、一端を壁体３に固定され、支持部材４
ａ，４ｂにより支持されている。５ａ〜５ｃは前
記各押出機１ａ〜１ｃから押出されるセラミツク
スの生材料６ａ〜６ｃを管状に成形するためのノ
ズルで、内周面は鏡面加工を施されており、前記
芯金棒２に間隔をあけて同心状に外嵌している。
前記ノズル５ａは前記押出機１ａと１ｂとを連結
しており、前記ノズル５ｂは前記押出機１ｂと１
ｃとを連結している。７は前記押出機１ａから生
材料６ａが押出方向（第１図左方向）と反対方向
に流出するのを防止するための筒状体である。前
記各押出機１ａ〜１ｃから所定の押出方向（第１
図左方向）に生材料６ａ〜６ｃが押し出されるよ
うにするため、各押出機１ａ〜１ｃの押出圧力
P1〜P3はP1＞P2＞P3に設定され、かつ各ノズル
５ａ〜５ｃの長さl1＞l2＞l3となるように設定さ
れている。前記ノズル５ａ〜５ｃの内径r1〜r3は
もちろんr1＜r2＜r3に設定されている。前記芯金
棒２には、前記各ノズル５ａ〜５ｃに対応する部
分の外周面に周方向全長にわたる溝が形成され、
これら溝には多孔質のセラミツクス８ａ〜８ｃが
装着されている。このセラミツクス８ａ〜８ｃの
長さは前記ノズル５ａ〜５ｃの長さの約半分であ
り、セラミツクス８ａ〜８ｃとノズル５ａ〜５ｃ
とは、それらの生材料押出方向上手側端面が一致
するように配置されている。前記各セラミツクス
８ａ〜８ｃは、第２図に詳細に示す芯金棒２に形
成された孔９によつて互いに連通せしめられてお
り、この孔９は前記芯金棒２外周面の位置Ａに開
口している。なお前記芯金棒２はセラミツクス８
ａ〜８ｃを装着するために、各分割片が互いにネ
ジ結合されている。 In FIG. 1, 1a to 1c are high-pressure vacuum screw type extruders, and these extruders 1a to 1c are
A core metal rod 2 is disposed to penetrate through it. This core rod 2 has one end fixed to a wall 3 and a support member 4
a, 4b. Reference numerals 5a to 5c designate nozzles for forming the raw ceramic materials 6a to 6c extruded from the extruders 1a to 1c into tubular shapes, the inner peripheral surface of which is mirror-finished, and the core rods 2 are spaced apart from each other. They are fitted concentrically with the holes open.
The nozzle 5a connects the extruders 1a and 1b, and the nozzle 5b connects the extruders 1b and 1b.
c is connected. Reference numeral 7 denotes a cylindrical body for preventing the raw material 6a from flowing out from the extruder 1a in a direction opposite to the extrusion direction (left direction in FIG. 1). A predetermined extrusion direction (first direction) from each of the extruders 1a to 1c
In order to extrude the raw materials 6a to 6c in the left direction in the figure, the extrusion pressure of each extruder 1a to 1c is
P1 to P3 are set to satisfy P1 > P2 > P3 , and the lengths of the nozzles 5a to 5c are set to satisfy l1 > l2 > l3 . The inner diameters r1 to r3 of the nozzles 5a to 5c are of course set to satisfy r1 < r2 < r3 . A groove extending over the entire length in the circumferential direction is formed on the outer circumferential surface of the core metal rod 2 at a portion corresponding to each of the nozzles 5a to 5c,
Porous ceramics 8a to 8c are mounted in these grooves. The length of the ceramics 8a to 8c is approximately half the length of the nozzles 5a to 5c, and the length of the ceramics 8a to 8c and the nozzles 5a to 5c
and are arranged so that their upper end surfaces in the raw material extrusion direction coincide with each other. Each of the ceramics 8a to 8c is communicated with each other by a hole 9 formed in the core rod 2, which is shown in detail in FIG. ing. Note that the core bar 2 is made of ceramics 8.
To attach parts a to 8c, each segment is screwed together.
複合セラミツクス管の製造に際しては、押出機
１ａ〜１ｃに所定のセラミツクスの生材料６ａ〜
６ｃを供給する。この生材料６ａ〜６ｃの配合
は、一般のセラミツクス押出し成形時に配合され
る材料、例えばセラミツクス粉体、水、バインダ
ー、可塑剤等が用いられる。これらの配合割合や
セラミツクス粉体の粒度などは、目的とする複合
セラミツクス管の性質に応じて決定する。押出機
１ａにより押出される生材料６ａは、ノズル５ａ
と芯金棒２との間隙を通る間に管状に形成され、
芯金棒２に外嵌した状態で押出機１ｂからノズル
５ｂに至る。また押出機１ｂから押出される生材
料６ｂは、ノズル５ｂ内を通過する間に、生材料
６ａの外周面に密着した状態で管状に形成され、
これにより生材料６ａ，６ｂの二重管が形成され
る。そして押出機１ｃから押出される生材料６ｃ
は、ノズル５ｃ内を通過する間に、生材料６ｂの
外周面に密着した状態が管状に形成され、これに
より生材料６ａ〜６ｃの三重管が形成される。一
方、芯金棒２の孔９には、図外の離型剤供給装置
により位置Ａから離型剤が供給される。この離型
剤は孔９を通つて多孔質のセラミツクス８ａ〜８
ｃに至り、これらセラミツクス８ａ〜８ｃからに
じみ出て、生材料６ａと芯金棒２との摩擦抵抗を
減少させる。かくしてノズル５ｃから押出された
生材料６ａ〜６ｃの三重管は、押出機１ｃの後段
に設置された切断機（図示せず）により所定長さ
に切断され、さらに後段に設置された焼結機（図
示せず）により焼結される。このようにして、３
層の複合セラミツクス管が連続的に製造される。 When manufacturing a composite ceramic tube, predetermined ceramic raw materials 6a to 1c are fed to extruders 1a to 1c.
Supply 6c. The raw materials 6a to 6c are blended using materials that are commonly blended during ceramic extrusion molding, such as ceramic powder, water, binder, and plasticizer. The blending ratio of these and the particle size of the ceramic powder are determined depending on the properties of the intended composite ceramic tube. The raw material 6a extruded by the extruder 1a is passed through the nozzle 5a.
is formed into a tubular shape while passing through the gap between and the core metal rod 2,
The core rod 2 is fitted onto the core rod 2 from the extruder 1b to the nozzle 5b. Further, the raw material 6b extruded from the extruder 1b is formed into a tubular shape in close contact with the outer peripheral surface of the raw material 6a while passing through the nozzle 5b,
This forms a double tube of raw materials 6a, 6b. And the raw material 6c extruded from the extruder 1c
While passing through the nozzle 5c, the raw material 6b is formed into a tubular shape in close contact with the outer circumferential surface of the raw material 6b, thereby forming a triple tube of the raw materials 6a to 6c. On the other hand, a release agent is supplied to the hole 9 of the core rod 2 from position A by a release agent supply device (not shown). This mold release agent passes through the holes 9 into the porous ceramics 8a to 8.
c, and oozes out from these ceramics 8a to 8c, reducing the frictional resistance between the raw material 6a and the core metal rod 2. The triple tube of raw materials 6a to 6c thus extruded from the nozzle 5c is cut into a predetermined length by a cutting machine (not shown) installed downstream of the extruder 1c, and then cut into a predetermined length by a sintering machine installed downstream of the extruder 1c. (not shown). In this way, 3
A composite ceramic tube of layers is produced in succession.
なお上記実施例においては、３層の複合セラミ
ツクス管を製造する例について説明したが、押出
機の段数の増減により任意の層数の複合セラミツ
クス管を製造可能であることは勿論である。 In the above embodiment, an example was explained in which a three-layer composite ceramic tube was manufactured, but it is of course possible to manufacture a composite ceramic tube with any number of layers by increasing or decreasing the number of stages of the extruder.
以上説明したように本発明によれば、任意長さ
でかつ任意の層数の複合セラミツクス管を容易に
大量生産し得る。したがつて、内周側に耐熱性を
持たせ、外周側に断熱性を持たせた複合セラミツ
クス管や、内周側のみを特性の優れた材料にし、
外周側を特性の劣る安価な材料として材料コスト
の低減を図つた複合セラミツクス管等を、より安
価にかつ迅速に供給できる。 As explained above, according to the present invention, composite ceramic tubes of any length and any number of layers can be easily mass-produced. Therefore, we are developing composite ceramic pipes that have heat resistance on the inner circumference and heat insulation on the outer circumference, and materials with excellent properties only on the inner circumference.
Composite ceramic tubes, etc., whose outer periphery is made of an inexpensive material with inferior properties to reduce material costs, can be supplied more cheaply and quickly.
第１図は本発明の一実施例における複合セラミ
ツクスの製造方法に用いる製造装置の要部の概略
断面図、第２図は同装置のノズル付近の拡大断面
図である。
１ａ〜１ｃ……押出機、２……芯金棒、５ａ〜
５ｃ……ノズル、６ａ〜６ｃ……生材料。
FIG. 1 is a schematic cross-sectional view of a main part of a manufacturing apparatus used in a method for manufacturing composite ceramics according to an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of the vicinity of a nozzle of the same apparatus. 1a-1c...Extruder, 2...Core rod, 5a-
5c...Nozzle, 6a-6c...Raw material.
Claims (1)
ノズルを各々有しかつこれらノズルが一直線上に
配置された複数段の押出機と、前記ノズルの全部
を同心状に貫通する芯金棒とを用いて、初段の押
出機に供給された生材料を初段のノズルから芯金
棒に外嵌した状態で連続的に押し出し、次段以降
の押出機に供給された生材料を次段以降のノズル
からその前段のノズルにより管状に形成された生
材料に外嵌した状態で順次連続的に押し出し、か
くして連続的に得られる複数層の生材料からなる
管を切断機により所定長さに切断し、これを焼結
機により焼結することを特徴とする複合セラミツ
クス管の製造方法。1. Using a multi-stage extruder, each having a nozzle for extrusion-molding ceramic raw materials, and in which these nozzles are arranged in a straight line, and a cored rod passing concentrically through all of the nozzles, The raw material supplied to the first stage extruder is continuously extruded from the first stage nozzle while being fitted onto the core metal rod, and the raw material supplied to the next stage extruder is extruded from the next stage nozzle to the previous stage. A nozzle is used to sequentially and continuously extrude the raw material formed into a tubular shape while the raw material is fitted onto the outside, and the tube consisting of multiple layers of the raw material thus obtained is cut into a predetermined length using a cutting machine, which is then sintered. A method for manufacturing a composite ceramic tube, characterized by sintering it using a machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9993883A JPS59224309A (en) | 1983-06-03 | 1983-06-03 | Manufacturing method of composite ceramic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9993883A JPS59224309A (en) | 1983-06-03 | 1983-06-03 | Manufacturing method of composite ceramic tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59224309A JPS59224309A (en) | 1984-12-17 |
| JPH0129682B2 true JPH0129682B2 (en) | 1989-06-13 |
Family
ID=14260653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9993883A Granted JPS59224309A (en) | 1983-06-03 | 1983-06-03 | Manufacturing method of composite ceramic tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59224309A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0780701B2 (en) * | 1987-07-14 | 1995-08-30 | 株式会社アイジー技術研究所 | Continuous production equipment for long ceramic plates |
| JPH0780702B2 (en) * | 1987-07-31 | 1995-08-30 | 株式会社アイジー技術研究所 | Continuous production equipment for long ceramic plates |
| US5053092A (en) * | 1988-03-21 | 1991-10-01 | Corning Incorporated | Method for producing a sinterable extruded laminated article |
-
1983
- 1983-06-03 JP JP9993883A patent/JPS59224309A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59224309A (en) | 1984-12-17 |
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