JPH1183719A - Method for evaluating plasticity of tempered soil - Google Patents
Method for evaluating plasticity of tempered soilInfo
- Publication number
- JPH1183719A JPH1183719A JP24821997A JP24821997A JPH1183719A JP H1183719 A JPH1183719 A JP H1183719A JP 24821997 A JP24821997 A JP 24821997A JP 24821997 A JP24821997 A JP 24821997A JP H1183719 A JPH1183719 A JP H1183719A
- Authority
- JP
- Japan
- Prior art keywords
- plasticity
- clay
- evaluating
- tempered
- soil
- 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
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明はセラミックス製品を
製造するための練土の可塑性を評価する方法に関する。[0001] The present invention relates to a method for evaluating plasticity of a clay for producing a ceramic product.
【0002】[0002]
【従来の技術】陶磁器やファインセラミックス製品等の
セラミックス製品を製造する方法の一つとして、可塑性
練土を成形した後、乾燥し、焼成する方法がある。この
成形には、プレス成形法、ろくろ成形、押出成形法など
が採用されているが、いずれの成形方法においても練土
の可塑性を適切なものとしておく必要がある。2. Description of the Related Art As one of the methods for producing ceramic products such as ceramics and fine ceramic products, there is a method in which a plastic clay is formed, dried and fired. Press molding, potter's wheel molding, extrusion molding, and the like are employed for this molding. In any of the molding methods, it is necessary to make the plasticity of the clay suitable.
【0003】練土の可塑性は、『こし』と呼ばれる保形
性と『のび』と呼ばれる変形性で表されている。そのよ
うな練土の可塑性を評価する方法として、ペッファーコ
ルン法や圧縮試験等が行われ、それらは練土に応力を加
えて変形させることで可塑性を評価している。しかし、
いずれの評価法においても、練土は閉鎖された状態の中
で応力により変形するのではなく、開口がありある程度
練土が動きやすい状態で評価が行われている。従って、
閉鎖された空間に近い状態で練土が変形により圧密され
ることによりどの程度充填しやすいかを評価する方法は
ほとんどなかった。[0003] The plasticity of the clay is expressed by a shape retention property called "Koshi" and a deformability called "Nobi". As a method for evaluating the plasticity of such a clay, a Pefferkorn method, a compression test, and the like are performed. In these methods, plasticity is evaluated by applying stress to the clay and deforming the clay. But,
In any of the evaluation methods, the evaluation is performed in a state in which the kneaded material has an opening and the kneaded material is easily movable to some extent, instead of being deformed by stress in a closed state. Therefore,
There was hardly any method to evaluate how easily the compacted soil could be filled by being compacted by deformation in a state close to a closed space.
【0004】[0004]
【発明が解決しようとする課題】本発明は、陶磁器やフ
ァインセラミックス製造で行われている湿式プレス成形
や煉瓦や屋根瓦の形状を整えるために行われる再加圧成
形のように、練土が閉鎖された空間にて圧密されて成形
が行われる成形法において、使用される練土の評価に使
える練土の可塑性評価方法を提供することを目的とす
る。SUMMARY OF THE INVENTION The present invention relates to a method in which clay is used for forming a clay, such as wet press molding performed in the manufacture of ceramics and fine ceramics, and re-press molding performed in order to adjust the shape of bricks and roof tiles. It is an object of the present invention to provide a method for evaluating the plasticity of a clay which can be used for evaluating a clay to be used in a molding method in which compaction is performed in a closed space.
【0005】[0005]
【課題を解決するための手段】本発明の練土の可塑性評
価方法は、フィルタで覆われたノズル孔を有するシリン
ダ内に練土を入れ、ピストンで該練土を低圧と高圧で押
圧して練土を圧搾し、低圧で圧搾した場合と、高圧で圧
搾した場合の固体体積分率の差に基づいて練土の可塑性
を評価するものである。According to the method for evaluating the plasticity of a kneaded material of the present invention, a kneaded material is put into a cylinder having a nozzle hole covered with a filter, and the kneaded material is pressed with a piston at low pressure and high pressure. The plasticity of the kneaded material is evaluated based on the difference between the solid volume fraction when the kneaded material is squeezed and squeezed at a low pressure and when the material is squeezed at a high pressure.
【0006】本発明方法は、シリンダの中で、練土をフ
ィルタで挟み、ピストンによって圧力をかけ圧搾するこ
とで練土がどの程度変化するのかを評価する方法であ
る。この評価尺度としては、低圧で圧搾した場合と高圧
で圧搾した場合の固体体積分率の差を利用しており、こ
の差が大きいほど、閉鎖空間での練土の充填性が良い。[0006] The method of the present invention is a method for evaluating the extent to which the mass is changed by sandwiching the mass with a filter in a cylinder, applying pressure with a piston and squeezing the mass. As this evaluation scale, the difference in solid volume fraction between when squeezed at a low pressure and when squeezed at a high pressure is used, and the larger the difference, the better the fillability of the clay in the closed space.
【0007】[0007]
【発明の実施の形態】図1は実施の形態に係る練土の可
塑性評価方法に用いられる装置の断面図である。FIG. 1 is a sectional view of an apparatus used in a method for evaluating plasticity of a clay according to an embodiment.
【0008】シリンダ1の底部にノズル孔2を有したノ
ズルプレート3がロックナット4によって固定設置され
ている。このシリンダ1内に試料Sを濾紙Fで挟んで入
れ、ピストン5によって試料Sを押圧する。試料Sは圧
搾されて体積が減少する。低圧で圧搾した場合と高圧で
圧搾した場合の固体体積分率を測定し、その差から可塑
性を評価する。A nozzle plate 3 having a nozzle hole 2 at the bottom of a cylinder 1 is fixedly installed by a lock nut 4. The sample S is inserted into the cylinder 1 by the filter paper F, and the piston 5 presses the sample S. The sample S is squeezed to reduce its volume. The solid volume fraction when squeezed at low pressure and when squeezed at high pressure is measured, and the plasticity is evaluated from the difference.
【0009】種々の実験の結果、このピストン5によっ
て加えられる低圧力は、1.96〜3MPaが好ましい
ことが分かった。低圧力が1.96MPaよりも低いと
測定圧力による変動が大きく、評価結果のバラツキも大
きくなる傾向がある。また、3MPaよりも高いと、高
圧力の場合の固体体積分率との差が小さくなるため、練
土間の評価結果に明確な差がなくなる。As a result of various experiments, it has been found that the low pressure applied by the piston 5 is preferably 1.96 to 3 MPa. When the low pressure is lower than 1.96 MPa, the fluctuation due to the measured pressure is large, and the dispersion of the evaluation results tends to be large. On the other hand, when the pressure is higher than 3 MPa, the difference from the solid volume fraction in the case of high pressure becomes small, so that there is no clear difference between the evaluation results between the clays.
【0010】高圧力は、19.6MPa例えば19.6
〜30MPaが好ましいことが分かった。高圧力が1
9.6MPaよりも低いと、低圧力の場合の固体体積分
率との差が小さくなるため、練土間の評価結果に明確な
差がなくなる。The high pressure is 19.6 MPa, for example, 19.6 MPa.
-30 MPa was found to be preferable. High pressure is 1
When the pressure is lower than 9.6 MPa, the difference from the solid volume fraction in the case of low pressure becomes small, so that there is no clear difference in the evaluation results between the clays.
【0011】圧搾時間は2.5Hr以上例えば2.5〜
5Hrが好ましい。即ち、圧搾時間が2.5Hr以上に
なると固体体積分率はほぼ一定(飽和値)になることが
認められ、2.5Hr未満では固体体積分率が飽和値に
達しないことが多い。The pressing time is 2.5 hours or more, for example, 2.5 to
5Hr is preferred. That is, it is recognized that the solid volume fraction becomes substantially constant (saturated value) when the pressing time is 2.5 Hr or more, and the solid volume fraction does not often reach the saturated value when the compression time is less than 2.5 Hr.
【0012】上記のシリンダ1の内径は5〜100mm
程度とくに10〜50mm程度が好ましい。ノズル孔2
の直径は0.5〜3mmとくに1〜2mm程度が好まし
い。試料Sの量は、圧搾前のシリンダ軸心線方向の試料
厚さが3〜30mmとくに5〜20mm程度となるよう
にするのが好ましい。The inner diameter of the cylinder 1 is 5 to 100 mm
About 10 to 50 mm is particularly preferable. Nozzle hole 2
Has a diameter of preferably 0.5 to 3 mm, more preferably about 1 to 2 mm. The amount of the sample S is preferably such that the thickness of the sample in the direction of the axis of the cylinder axis before pressing is about 3 to 30 mm, particularly about 5 to 20 mm.
【0013】なお、固体体積分率及び含水率はそれぞれ
次式で算出される。 固体体積分率(%)=1÷(含水率×0.01×粉体の真比
重+1)×100 含水率(%)=(乾燥前重量−100 ℃乾燥後重量)÷10
0 ℃乾燥後重量×100 本発明において、練土としては粘土等の天然鉱物質練土
のほか、アルミナ、シリカ、ジルコニアなど各種のセラ
ミック粉体の練土であっても良い。The solid volume fraction and the water content are respectively calculated by the following equations. Solid volume fraction (%) = 1 {(water content × 0.01 × true specific gravity of powder + 1) × 100 water content (%) = (weight before drying−100 weight after drying at 100 ° C.) ÷ 10
The weight after drying at 0 ° C. × 100 In the present invention, the clay may be a clay of a natural mineral such as clay or a clay of various ceramic powders such as alumina, silica and zirconia.
【0014】[0014]
【実施例】図1の装置において、シリンダ内径(直径)
を10mm、ノズル孔の直径を1mmとし、濾紙として
JISのP3801に規定される5種Cのものを用い
た。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the apparatus shown in FIG.
Was set to 10 mm, the diameter of the nozzle hole was set to 1 mm, and five types of C specified in JIS P3801 were used as filter paper.
【0015】試料として粘土及びアルミナ粉の練土を用
いた。試料量は0.4〜0.6gとした。ピストンによ
る押圧圧力は低圧を1.96MPa、高圧を19.6M
Paとし、圧搾時間は2.5Hrとした。[0015] Clay and alumina powder were used as samples. The sample amount was 0.4 to 0.6 g. The pressing pressure of the piston is 1.96MPa for low pressure and 19.6M for high pressure.
Pa and the pressing time was 2.5 Hr.
【0016】圧搾前の各試料の含水率と、低圧で圧搾し
た場合と高圧で圧搾した場合の固体体積分率の測定結果
を触感による充填性評価結果と共に表1に示す。Table 1 shows the water content of each sample before pressing and the measurement results of the solid volume fraction when pressed at a low pressure and when pressed at a high pressure, together with the results of evaluation of filling properties by touch.
【0017】[0017]
【表1】 [Table 1]
【0018】表1より、固体体積分率の低圧で圧搾した
場合と高圧で圧搾した場合の差(%)と充填性との間に
は相関関係があり、この差(%)が6.5%以上とくに
7%以上になると良好な充填性を有した練土になること
が認められた。From Table 1, there is a correlation between the difference (%) between the case where the solid volume fraction is pressed at a low pressure and the case where the solid volume fraction is pressed at a high pressure and the filling property, and this difference (%) is 6.5. % Or more, especially 7% or more, it was recognized that the kneaded material had good filling properties.
【0019】[0019]
【発明の効果】以上の通り、本発明によると、閉鎖され
た空間に近い状態での練土の充填性を簡単に評価するこ
とが可能となる。As described above, according to the present invention, it is possible to easily evaluate the filling property of the clay in a state close to a closed space.
【図1】本発明方法に用いられる評価装置の断面図であ
る。FIG. 1 is a sectional view of an evaluation device used in the method of the present invention.
1 シリンダ 2 ノズル孔 5 ピストン 1 cylinder 2 nozzle hole 5 piston
フロントページの続き (72)発明者 小田 喜一 愛知県名古屋市千種区千代ケ丘5 コミュ ニタスS−715 (72)発明者 佐野 三郎 愛知県名古屋市千種区北千種3−2−3, 15−24 (72)発明者 伴野 巧 愛知県名古屋市北区八千代町2−109,八 千代寮103 (72)発明者 川合 秀治 愛知県半田市瑞穂町2−3−22,イースト タウン206号室 (72)発明者 小栗 賢太 愛知県名古屋市東区砂田橋3−2,103− 1206 (72)発明者 野村 祐二 愛知県名古屋市北区金城2−1−11,コー ポ若園E号 (72)発明者 小野 晃 愛知県名古屋市北区光音寺町1−66,エス テート弦四路306号室Continuation of the front page (72) Inventor Kiichi Oda 5 Communitas S-715 5 Chiyogaoka, Chigusa-ku, Nagoya-shi, Aichi (72) Inventor Saburo Sano Inventor 3-2-3, 15-24, 72-24 ) Inventor Takumi Banno 2-109, Yachiyo Ryo 103, Yachiyo-cho, Kita-ku, Nagoya-shi, Aichi 103 (72) Inventor Shuji Kawai 2-3-22, Mizuho-cho, Handa-shi, Aichi, East Town Room 206 (72) Inventor Oguri Kenta 3-1, 103-1206, Sunadabashi, Higashi-ku, Nagoya City, Aichi Prefecture (72) Inventor Yuji Nomura 2-1-11 Kinjo Wakaen, Kita-ku, Nagoya City, Aichi Prefecture, Corp. E (72) Inventor Akira Ono Nagoya, Aichi Prefecture 1-66 Koonji-cho, Kita-ku
Claims (2)
リンダ内に練土を入れ、ピストンで該練土を押圧して練
土を圧搾し、低圧で圧搾した場合と高圧で圧搾した場合
の固体体積分率の差に基づいて練土の可塑性を評価する
練土の可塑性評価方法。1. A method comprising: putting a clay into a cylinder having a nozzle hole covered with a filter; pressing the clay with a piston to squeeze the clay; pressing the solid at a low pressure and a solid at a high pressure. A method for evaluating the plasticity of a clay based on the difference in volume fraction.
圧力を低圧は1.96〜3.0MPa、高圧は19.6
MPa以上とし、圧搾時間を2.5Hr以上とし、フィ
ルタとして濾紙を用いることを特徴とする練土の可塑性
評価方法。2. The pressure of claim 1, wherein the low pressure is 1.96 to 3.0 MPa and the high pressure is 19.6.
A method for evaluating the plasticity of a kneaded material, wherein the pressure is at least MPa, the pressing time is at least 2.5 Hr, and filter paper is used as a filter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP09248219A JP3101672B2 (en) | 1997-09-12 | 1997-09-12 | Method for evaluating plasticity of clay |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP09248219A JP3101672B2 (en) | 1997-09-12 | 1997-09-12 | Method for evaluating plasticity of clay |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH1183719A true JPH1183719A (en) | 1999-03-26 |
JP3101672B2 JP3101672B2 (en) | 2000-10-23 |
Family
ID=17174958
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP09248219A Expired - Lifetime JP3101672B2 (en) | 1997-09-12 | 1997-09-12 | Method for evaluating plasticity of clay |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3101672B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008002824A (en) * | 2006-06-20 | 2008-01-10 | Central Res Inst Of Electric Power Ind | Water extractor of rock |
RU2631616C1 (en) * | 2016-11-15 | 2017-09-25 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный технологический университет" (ФГБОУ ВО "КубГТУ") | Method for determining plasticity borders of soils |
-
1997
- 1997-09-12 JP JP09248219A patent/JP3101672B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008002824A (en) * | 2006-06-20 | 2008-01-10 | Central Res Inst Of Electric Power Ind | Water extractor of rock |
RU2631616C1 (en) * | 2016-11-15 | 2017-09-25 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный технологический университет" (ФГБОУ ВО "КубГТУ") | Method for determining plasticity borders of soils |
Also Published As
Publication number | Publication date |
---|---|
JP3101672B2 (en) | 2000-10-23 |
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