JPH02238906A - Extruding machine - Google Patents
Extruding machineInfo
- Publication number
- JPH02238906A JPH02238906A JP6027489A JP6027489A JPH02238906A JP H02238906 A JPH02238906 A JP H02238906A JP 6027489 A JP6027489 A JP 6027489A JP 6027489 A JP6027489 A JP 6027489A JP H02238906 A JPH02238906 A JP H02238906A
- Authority
- JP
- Japan
- Prior art keywords
- inner diameter
- runner
- extruding drum
- extrusion
- drum
- 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.)
- Granted
Links
- 239000004927 clay Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 abstract description 10
- 229910052751 metal Inorganic materials 0.000 abstract description 10
- 239000000919 ceramic Substances 0.000 abstract description 9
- 238000005452 bending Methods 0.000 abstract description 3
- 238000007664 blowing Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は中空碍子のような中空セラミックス体を押出成
形するために使用される押出機に関するものである．
（従来の技術）
上記のような中空セラミックス体を押出成形するには、
押出ドラムの内部に流し金と呼ばれる内径成形用の棒状
金具を取付けた押出機が用いられている．この流し金は
基端がスクリエー軸の先端に取付けられ、その先端は押
出ドラムの先端の口金の内部に達するものであって、径
に比較して長さが極めて長い棒状体であり、スクリエー
軸によって押出される坏土の流れの中に支持され、その
周囲の圧力バランスによって押出ドラムの中心に位置す
るものである．ところがこのような棒状の流し金は押出
推力によって位置がずれて中空体が偏肉となることがあ
り、特に内径の大きい製品を成形するために流し金の径
を大きくした場合に流し金に作用する抵抗が大きくなり
、偏肉を生じ易い欠点があった．そこで流し金の形状や
材質を変えてその剛性を高めることにより位置ずれを防
止する試みもなされたが、好ましい効果が得られなかっ
た．
（発明が解決しようとする課Ｉ！ｌ！）本発明はこのよ
うな従来の問題を解決して、内径の小さい中空セラミッ
クス製品を正確に押出成形できることは勿論、内径の大
きい中空セラミックス製品を成形する場合にも偏肉が生
じるおそれのない押出機を提供するために完成されたも
のである．
（ＩＩ題を解決するための手段）
上記の課題を解決するためになされた本発明は、坏土押
出用の二次軸の先端に内径成形用の流し金を取付けた押
出機において、流し金が複数個に分解された部分からな
り、各部分の相互間がユニバーサルジツイントにより屈
曲自在に連結されたものであることを特徴とするもので
ある．（実施例）
以下に本発明を図示の実施例によって更に詳細に説明す
る．
第１図において、（１）はホッパー（２）から投入され
た坏土を押出すためのスクリュー形の一次軸、（３）は
坏土中からガスや空気を排除するための真空室、（４）
は脱気された坏土を押出成形するためのスクリュー型の
二次軸、（５）は押出ドラムである．押出ドラム（５）
は大径製品を押出成形する場合には図示のように先端を
次第に拡径させておくものとする（６）はこの押出ドラ
ム（５）の内部に設けられる流し金であり、その基端（
７）は従来のものと同様に二次軸（４）の先端に取付け
られている．本発明においては、この流し金（６）は従
来のように一体型のものではなく、複数個の部分（８）
、（９）、０Φに分割されている．そして各部分（８）
、（９｝間、（９）、００間はそれぞれユニバーサルジ
ツイン｝００，Ｑ２１にって屈曲自在に連結されている
．ユニバーサルジヲィント００、０力は互いに垂直な２
本のピンを介して２つの部材を接続するために常用され
る機構であって、本発明においては流し金《６》の複数
個の部分（８）、（９）、０ωを任意の方向に屈曲自在
に連結することができるものであれば、任意の型式のユ
ニバーサルジョイントを用いることができる．なお先端
の部分ＯＩには内径口金０３）がボルト（ロ）によって
取付けられている．この内径口金＋１３１は中空製品の
内径を正確に成形するためのものであって、部分０ωか
ら突設された取付軸０５）にねじ込まれるボルト（ロ）
により、押え金具ＯＱを介して固定されている．このよ
うな構造としておけば、成形しようとする中空製品の内
径に合わせて内径口金０３１のみを容易に交換すること
ができるが、先端の部分０（＋１と内径口金（＋３１と
が一体化したものを用いてもよいことは言うまでもない
．（作用）
このように構成されたものは、従来の押出機と同様に真
空室（３）において脱気された坏土を二次軸（４）によ
って押出ドラム（５）の内部から押出し、外径が押出ド
ラム（５）の内径に等しく、内径が流し金（６）の内径
口金０クの外径に等しい中空セラミックス製品を押出成
形するものである．しかし本発明においては、従来のも
のとは異なり流し金（６）が複数個の部分（８）、（９
）、（ｌ［Ｄに分割されて相互にユニバーサルジツイン
トで屈曲自在に連結されているため、流し金（６）は各
部分が周囲の圧力分布に応じて自由に押出ドラム（５）
内で押出ドラム（５）の軸線に対して垂直方向に動くこ
とができる．この結果、従来の常識に反して、流し金（
６）の先端の部分（至）及び内径口金面は却って正しく
押出ドラム（５）の中心に位置することとなり、押出さ
れた中空製品に偏肉が発生することが確実に防止される
．この理由は、押出ドラム（５）内で発生する圧力のア
ンバランスが流し金（６）の途中の部分の動きによって
吸収されてしまい、先端の部分ａＩＩｌに変位を生じさ
せないためであると考えられる．
このように、本発明によれば流し金（６）の先端の部分
ａΦや内径口金０３１を正確に押出ドラム（５）の中心
に位置させることができ、内径口金０湯を大径のものと
した場合にもこの作用効果は維持されるから内径の大き
い中空セラミックス製品を偏肉を生じさせることなく押
出成形することができる．なお実施例では流し金（６）
を３つの部分に分割したが、複数であればその分割個数
は自由である．（発明の効果）
本発明は以上に説明したとおり、従来の常識に反して流
し金を屈曲自在とすることによって流し金の先端を正確
に押出ドラムの中心に位置させたものであり、内径の大
きい中空セラミックス製品をも変肉を生じさせることな
く押出成形することができる．
よって本発明は従来の問題点を一掃した押出機として、
産業の発展に寄与するところは極めて大である．DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an extruder used for extrusion molding hollow ceramic bodies such as hollow insulators. (Prior art) In order to extrude the hollow ceramic body as described above,
An extruder is used with an extrusion drum equipped with a rod-shaped metal fitting called a sink metal for forming the inner diameter inside the extrusion drum. This sink is a rod-shaped body whose base end is attached to the tip of the screw shaft, and whose tip reaches the inside of the mouthpiece at the tip of the extrusion drum, and whose length is extremely long compared to the diameter. It is supported in the flow of clay extruded by the drum, and is positioned at the center of the extrusion drum due to the pressure balance around it. However, such a rod-shaped sinker may be misaligned due to the extrusion thrust, resulting in uneven thickness of the hollow body.Especially when the diameter of the sinker is increased in order to mold a product with a large inner diameter, this may affect the sinker. This has the disadvantage that the resistance to bending increases and uneven thickness tends to occur. Attempts have been made to prevent misalignment by changing the shape and material of the sink metal to increase its rigidity, but this did not produce the desired effect. (Issues to be solved by the invention I!l!) The present invention solves these conventional problems, and not only can hollow ceramic products with a small inner diameter be accurately extruded, but also hollow ceramic products with a large inner diameter can be molded. This was completed in order to provide an extruder that does not cause uneven thickness even when it is used. (Means for Solving Problem II) The present invention, which has been made to solve the above problems, provides an extruder in which a sink for forming an inner diameter is attached to the tip of a secondary shaft for extruding clay. It is characterized in that it consists of a plurality of disassembled parts, and each part is bendably connected to each other by a universal joint. (Examples) The present invention will be explained in more detail below using illustrated examples. In Figure 1, (1) is a screw-shaped primary shaft for extruding the clay charged from the hopper (2), (3) is a vacuum chamber for removing gas and air from the clay, ( 4)
(5) is a screw-shaped secondary shaft for extrusion molding the deaerated clay, and (5) is an extrusion drum. Extrusion drum (5)
When extruding a large-diameter product, the diameter of the tip is gradually expanded as shown in the figure. (6) is a sink provided inside this extrusion drum (5), and its base end (
7) is attached to the tip of the secondary shaft (4) like the conventional one. In the present invention, this sink metal (6) is not integrated as in the past, but is made up of multiple parts (8).
, (9), is divided into 0Φ. and each part (8)
, (9} and (9), 00 are connected in a flexible manner by universal joints }00, Q21, respectively.Universal joints 00, 0 force are 2
It is a mechanism commonly used to connect two members via a book pin, and in the present invention, the plurality of parts (8), (9), 0ω of the sink metal (6) can be moved in any direction. Any type of universal joint can be used as long as it can be connected in a flexible manner. The inner diameter cap 03) is attached to the tip OI with a bolt (b). This inner diameter cap +131 is for accurately shaping the inner diameter of the hollow product, and is a bolt (b) that is screwed into the mounting shaft 05) protruding from the portion 0ω.
It is fixed via the presser fitting OQ. With this structure, only the inner diameter cap 031 can be easily replaced to match the inner diameter of the hollow product to be molded. Needless to say, it is also possible to use the extruder.(Function) The extruder configured in this way extrudes the degassed clay in the vacuum chamber (3) using the secondary shaft (4), similar to the conventional extruder. A hollow ceramic product is extruded from the inside of the drum (5) and has an outer diameter equal to the inner diameter of the extrusion drum (5) and an inner diameter equal to the outer diameter of the inner diameter nozzle of the sink metal (6). However, in the present invention, unlike the conventional one, the sink metal (6) has a plurality of parts (8) and (9).
), (l [D) and are connected to each other with a universal joint so that each part can freely move around the extrusion drum (5) according to the surrounding pressure distribution.
It can move in the direction perpendicular to the axis of the extrusion drum (5). As a result, contrary to conventional wisdom, we found that
On the contrary, the tip end portion (end) and the inner diameter mouth surface of 6) are correctly positioned at the center of the extrusion drum (5), thereby reliably preventing uneven thickness from occurring in the extruded hollow product. The reason for this is thought to be that the unbalance of pressure generated within the extrusion drum (5) is absorbed by the movement of the middle part of the sink metal (6), and no displacement occurs in the tip part aIIl. ．． As described above, according to the present invention, the tip part aΦ of the sink metal (6) and the inner diameter mouthpiece 031 can be accurately positioned at the center of the extrusion drum (5), and the inner diameter mouthpiece 0 can be made into a large diameter one. Even when this is done, this effect is maintained, so hollow ceramic products with large inner diameters can be extruded without uneven thickness. In addition, in the example, Nagashikin (6)
is divided into three parts, but the number of divisions is free if there is more than one. (Effects of the Invention) As explained above, the present invention, contrary to conventional wisdom, allows the sinker to be bent freely so that the tip of the sinker is accurately positioned at the center of the extrusion drum. Large hollow ceramic products can also be extruded without causing wall thickness changes. Therefore, the present invention is an extruder that eliminates the conventional problems.
The contribution to industrial development is extremely large.
第１図は本発明の実施例を示す一部切欠正面図、第２図
はその要部の拡大断面図である．（４）二二次軸、（６
）：流し金、（８）、（９）、０Φ二流し金の分割され
た部分、（ＩＩ）ＳＱ２１：ユニバーサルジ−イント．FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the main part thereof. (4) Second quadratic axis, (6
): Flowing gold, (8), (9), divided parts of 0Φ second flowing gold, (II) SQ21: Universal Ji-int.
Claims (1)
金（６）を取付けた押出機において、流し金（６）が複
数個に分解された部分（８）、（９）、（１０）からな
り、各部分（８）、（９）、（１０）の相互間がユニバ
ーサルジョイント（１１）、（１２）により屈曲自在に
連結されたものであることを特徴とする押出機。Portions (8) and (9) where the sink (6) for forming the inner diameter is disassembled into multiple pieces in an extruder in which the sink (6) for forming the inner diameter is attached to the tip of the secondary shaft (4) for extruding clay. , (10), and each part (8), (9), (10) is connected to each other in a flexible manner by universal joints (11), (12). .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6027489A JPH02238906A (en) | 1989-03-13 | 1989-03-13 | Extruding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6027489A JPH02238906A (en) | 1989-03-13 | 1989-03-13 | Extruding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02238906A true JPH02238906A (en) | 1990-09-21 |
| JPH0470125B2 JPH0470125B2 (en) | 1992-11-10 |
Family
ID=13137398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6027489A Granted JPH02238906A (en) | 1989-03-13 | 1989-03-13 | Extruding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02238906A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011194791A (en) * | 2010-03-23 | 2011-10-06 | Ngk Insulators Ltd | Soil kneading machine and method of extrusion-molding body by soil kneading machine |
-
1989
- 1989-03-13 JP JP6027489A patent/JPH02238906A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011194791A (en) * | 2010-03-23 | 2011-10-06 | Ngk Insulators Ltd | Soil kneading machine and method of extrusion-molding body by soil kneading machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0470125B2 (en) | 1992-11-10 |
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