JP2558779B2 - Pressure casting method for ceramics - Google Patents
Pressure casting method for ceramicsInfo
- Publication number
- JP2558779B2 JP2558779B2 JP63019059A JP1905988A JP2558779B2 JP 2558779 B2 JP2558779 B2 JP 2558779B2 JP 63019059 A JP63019059 A JP 63019059A JP 1905988 A JP1905988 A JP 1905988A JP 2558779 B2 JP2558779 B2 JP 2558779B2
- Authority
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- Japan
- Prior art keywords
- thickness
- pressure
- casting
- cast
- double
- 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 - Lifetime
Links
- 238000005266 casting Methods 0.000 title claims description 36
- 238000000034 method Methods 0.000 title claims description 12
- 239000000919 ceramic Substances 0.000 title claims description 7
- 239000000463 material Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 25
- 238000000465 moulding Methods 0.000 description 16
- 239000000758 substrate Substances 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 239000010433 feldspar Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 229910052573 porcelain Inorganic materials 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Landscapes
- Producing Shaped Articles From Materials (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は洗面器、便器などの陶磁器を成形する加圧鋳
込み成形方法に関する。Description: TECHNICAL FIELD The present invention relates to a pressure casting method for molding ceramics such as washbasins and toilet bowls.
（従来の技術） 焼結によって陶磁器を製造するには、原料粉末を目的
形状に成形する必要があり、この成形方法として特開昭
58−222808号に開示されるような加圧鋳込み成形方法が
知られいる。(Prior Art) In order to manufacture ceramics by sintering, it is necessary to shape the raw material powder into a desired shape.
A pressure casting method as disclosed in 58-222808 is known.
この加圧鋳込み成形方法は、スリップ（泥漿）を石こ
う等の多孔質な型内に流し込み、スリップに圧力をか
け、スリップ中の水分を型のキャビティ面から積極的に
吸収させて固化するようにしたものである。In this pressure casting method, slip (slurry) is poured into a porous mold such as gypsum, pressure is applied to the slip, and moisture in the slip is positively absorbed from the cavity surface of the mold to solidify. It was done.
一方、鋳込み成形によって得られた成形体には、スリ
ップ中の水分を片面のみから型に吸収する排泥鋳込み成
形にて形成される一重鋳込み部と、スリップ中の水分を
スリップに接する型の両面から吸収する固形鋳込み成形
にて形成される二重鋳込み部とがあり、衛生陶器のよう
に大型で複雑形状の製品には一重鋳込み部と二重鋳込み
とを有するものがある。On the other hand, the molded product obtained by casting has a single casting part formed by sludge casting that absorbs the moisture in the slip from only one side into the mold, and both sides of the mold that contact the moisture in the slip with the slip. There is a double cast portion formed by solid cast molding that absorbs from the above, and a large and complicated product such as sanitary ware has a single cast portion and a double cast portion.
（発明が解決しようとする課題） ところで上述の一重鋳込み部と二重鋳込み部との境界
部付近では乾燥収縮によるクラックが生じやすいため、
鋳込み成形の場合は常圧鋳込み成形か加圧鋳込み成形か
にかかわらず一重鋳込み部の厚さT1と二重鋳込み部の厚
さT2の比（T1/T2）を60/100＜T1/T2＜80/100としてい
る。(Problems to be solved by the invention) By the way, in the vicinity of the boundary between the above-mentioned single cast part and double cast part, cracks due to drying shrinkage are likely to occur,
In the case of cast molding, the ratio (T1 / T2) of the thickness T1 of the single cast portion and the thickness T2 of the double cast portion is 60/100 <T1 / T2 < 80/100.
即ち、一重鋳込み部の含水率が二重鋳込み部よりも高
いことによる収縮差が、一、二重境のクラック発生の原
因となり、又、常圧鋳込み成形の場合には、厚みが大き
くなる程素地の含水率も高くなることからT1/T2＜80/10
0とする必要があり、逆に二重鋳込み部の厚さT2が一重
鋳込み部の厚さT1の倍近くであると、乾燥時、焼結時に
二重鋳込み部の中央部から剥離が生じやすいため、上記
の範囲としている。That is, the difference in shrinkage due to the water content of the single cast part being higher than that of the double cast part causes the generation of cracks at the first and second boundaries, and in the case of normal pressure cast molding, the larger the thickness Since the water content of the base material is also high, T1 / T2 <80/10
If the thickness T2 of the double cast part is close to twice the thickness T1 of the single cast part, peeling easily occurs from the central part of the double cast part during drying and sintering. Therefore, the above range is set.
しかしながら、常圧での鋳込み成形であれば上記の範
囲でクラッチは生じにくいが、加圧鋳込み成形ではクラ
ック発生を有効に防止できない。However, although the clutch is unlikely to occur in the above range in the cast molding under normal pressure, the crack generation cannot be effectively prevented in the cast molding under pressure.
一方、土締めと称する方法も繰られている。この方法
は、一重鋳込み部から排泥した後に形成される空間に加
圧空気を供給して一重鋳込み部の水分を減少させる方法
であるが、この場合には一重鋳込み部が急激に収縮して
クラックが生じることがある。On the other hand, a method called earth tightening is also practiced. This method is a method of supplying pressurized air to the space formed after the mud is discharged from the single casting portion to reduce the water content of the single casting portion, but in this case, the single casting portion contracts rapidly. Cracks may occur.
従って、加圧鋳込み成形の場合、土締だけでは、一・
二重境クラックを完全に防止することはできない。Therefore, in the case of pressure cast molding, soil clamping alone
Double boundary cracks cannot be completely prevented.
（課題を解決するための手段） 上記課題を解決すべく本発明は、乾燥素地の厚さを基
準として、一重鋳込み部の厚さT1と二重鋳込み部の厚さ
T2が両者の境界部付近ではT1/T2≧82/100となるように
した。(Means for Solving the Problems) In order to solve the above problems, the present invention is based on the thickness of the dry base material, and the thickness T1 of the single cast portion and the thickness of the double cast portion
T1 / T2 ≥ 82/100 was set near T2.
（作用） 加圧鋳込み成形にあっては、常圧鋳込み成形と異な
り、素地厚さが大きい程含水率が小さく、且つT1/T2を
大きくするとともに泥圧を大きくすると一、二重鋳込み
部の水分差が小さくなる。(Function) In pressure casting, unlike normal pressure casting, the greater the substrate thickness, the lower the water content, and the greater T1 / T2 and the greater mud pressure, The difference in water content becomes smaller.
（実施例） 以下に本発明の実施例を添付図面に基づいて説明す
る。(Example) Below, the Example of this invention is described based on an accompanying drawing.
第１図は洗面ボールを成形する装置の断面図であり、
成形装置１は鋳型1a,1bから構成され、鋳型1a,1bを型締
めした状態で型間に成形用キャビティ２が形成され、こ
のキャビティ２内にスリップ３を加圧充填している。FIG. 1 is a sectional view of an apparatus for forming a washbasin,
The molding apparatus 1 is composed of molds 1a and 1b, a molding cavity 2 is formed between the molds in a state where the molds 1a and 1b are clamped, and a slip 3 is pressure-filled in the cavity 2.
スリップ３は例えば粘土、長石、陶石を解膠剤を添加
して水に混合し比重を約1.7としたものを用いる。また
鋳型1a,1bとしては石こう、焼結金属或いはプラスチッ
ク製の多孔質型とする。As the slip 3, for example, clay, feldspar, or porcelain stone added with a peptizer and mixed with water to have a specific gravity of about 1.7 is used. The molds 1a and 1b are made of gypsum, sintered metal or a plastic porous mold.
そして、周縁部については排泥鋳込み成形を行い、そ
れ以外の部分については固形鋳込み成形を行って厚み付
けが終了したら脱型し、第２図に示すような一重鋳込み
部4aと二重鋳込み部4bとからなる洗面ボール４を得る。
この洗面ボール４の一重鋳込み部4aの厚さをT1,二重鋳
込み部4bの厚さをT2とすると、第３図の拡大図に示すよ
うに一重鋳込み部4aと二重鋳込み部4bとの境界部付近に
おけるT1/T2はT1/T2≧82/100となっている。Then, the sludge casting molding is performed on the peripheral portion, the solid casting molding is performed on the other portions, and when the thickness is finished, the mold is removed, and the single casting portion 4a and the double casting portion as shown in FIG. A wash bowl 4 consisting of 4b is obtained.
Assuming that the thickness of the single-casting portion 4a of the washbasin 4 is T1 and the thickness of the double-casting portion 4b is T2, the single-casting portion 4a and the double-casting portion 4b are separated as shown in the enlarged view of FIG. T1 / T2 near the boundary is T1 / T2 ≧ 82/100.
第４図は同一の成形方法によって成形した水洗便器用
タンクの蓋５の断面図であり、この水洗便器用タンクの
蓋５も一重鋳込み部5aと二重鋳込み部5bとを併せ持ち、
一重鋳込み部5aの厚さT1と二重鋳込み部5bの厚さT2との
関係はT1/T2≧82/100となっている。FIG. 4 is a sectional view of the lid 5 of the flush toilet tank molded by the same molding method, and the lid 5 of the flush toilet tank also has a single cast portion 5a and a double cast portion 5b,
The relationship between the thickness T1 of the single cast portion 5a and the thickness T2 of the double cast portion 5b is T1 / T2 ≧ 82/100.
ところで本発明においてT1/T2≧82/100とした理由を
以下に述べる。The reason why T1 / T2 ≧ 82/100 in the present invention will be described below.
第５図は加圧鋳込み成形における素地の含水率と厚み
との関係を示すグラフ、第６図は同じく加圧鋳込み成形
における含水率と泥圧との関係を示すグラフである。つ
まり加圧鋳込み成形にあっては常圧鋳込み成形と異な
り、素地の厚みが大きい程含水率が小さくなる。これ
は、以下の理由からと推察される。FIG. 5 is a graph showing the relationship between the water content and the thickness of the green body in the pressure casting, and FIG. 6 is a graph showing the relationship between the water content and the mud pressure in the pressure casting as well. That is, in pressure cast molding, unlike normal pressure cast molding, the greater the thickness of the base material, the smaller the water content. This is presumed to be due to the following reasons.
即ち、素地の含水率は型のキャビティ面からの距離が
大きいほど大きく、その含水率は一重鋳込み部では排泥
面、二重鋳込み部では中央部において上昇率が急激に大
きくなる。言い換えれば、一重鋳込み部では排泥面、二
重鋳込み部では中央部が他の部分と比べると著しく含水
率が高い。ところがこの含水率が高い部分の厚みは、素
地厚みにかかわらず、ほぼ一定であるため、この部分の
素他厚み中に占める割合は、素地厚みが大きくなるほど
小さくなる。That is, the water content of the base material increases as the distance from the cavity surface of the mold increases, and the water content increases sharply at the mud discharge surface at the single casting portion and at the central portion at the double casting portion. In other words, the water content in the single casting part is remarkably higher than that in the other parts in the central portion of the double casting part. However, since the thickness of the portion having a high water content is almost constant regardless of the thickness of the base material, the proportion of this portion in the thickness of the base material or the like becomes smaller as the thickness of the base material becomes larger.
従って素地厚みが大きくなるほど、素地の含水率は小
さくなる事になる。Therefore, the thicker the substrate, the lower the water content of the substrate.
又、もう１つの理由としては、厚み付けが終了して、
泥圧が解放された時、型の水分が素地の方へ逆流して浸
透していく事があげられる。この逆流する水分量は、素
地厚みにかかわらず、ほぼ一定と考えられるため、結果
的に、素地厚みが大きくなるほど素地の含水率は小さく
なる事になる。Also, as another reason, after the thickening is completed,
When the mud pressure is released, the water in the mold flows back toward the substrate and penetrates. The amount of water flowing back is considered to be almost constant regardless of the thickness of the base material, and as a result, the water content of the base material decreases as the thickness of the base material increases.
更に消極的な理由として考えられるは、スリップ中の
水分を移動させるための全圧力は、多孔質の型材の有す
る吸引圧としての毛細管圧と水分を型面に押しつける泥
圧を併せたものであるが、両者を比較した場合、毛細管
圧は、型面（型と素地が接する面）を最大値として厚付
面（スリップと素地が接する面）では、素地厚みが大き
くなるほど、素地内の圧損によって小さくなる。これに
対して泥圧は厚付面では常に一定の値である。It can be considered as a more passive reason. The total pressure for moving the water in the slip is a combination of the capillary pressure as the suction pressure of the porous mold material and the mud pressure for pressing the water against the mold surface. However, when comparing the two, the capillary pressure is the maximum value on the mold surface (the surface where the mold and the base contact), and on the thickened surface (the surface where the slip and the base contact), the larger the base thickness, the more the pressure loss in the base causes Get smaller. On the other hand, the mud pressure is always a constant value on the thickened surface.
従って毛細管圧に関しては、素地厚みが大きくなる
と、かかる圧力が小さくなって、本来ならば含水率が大
きくなる傾向を示すはずであるが加圧鋳込み成形の様
に、毛細管力よりも泥圧の方が大きな場合においては、
この影響はあまり考慮しなくても良い事になる。Therefore, with regard to the capillary pressure, as the thickness of the base material increases, the applied pressure decreases and the water content should tend to increase, but as with pressure casting, the mud pressure is more desirable than the capillary force. Is large,
This effect does not need to be considered so much.
以上の様な理由より、加圧鋳込み成形においては、一
重、二重鋳込み部分の厚みが大きくなるほど、素地水分
が低下するものと考えられる。For the reasons described above, it is considered that in pressure casting, the water content of the base material decreases as the thickness of the single- and double-cast portions increases.
斯る知見に基づくと、加圧鋳込み成形において一重鋳
込み部と二重鋳込み部の含水率の差を小さくして乾燥時
のクラックを防止するには、二重鋳込み部の厚さT2に対
する一重鋳込み部の厚さT1を従来よりも厚くする必要が
ある。また鋳込圧を高くすると含水率が低下するのでク
ラックが生じやすくなる。Based on such knowledge, in order to reduce the difference in water content between the single cast part and the double cast part in pressure casting to prevent cracks during drying, the single cast with respect to the thickness T2 of the double cast part It is necessary to make the thickness T1 of the portion thicker than before. Further, when the casting pressure is increased, the water content is lowered, so that cracks are likely to occur.
そこで具体的な実験を行い、T1/T2の適切な値を求め
た。以下にその実験例を示す。Therefore, we conducted a specific experiment and found an appropriate value for T1 / T2. The experimental example is shown below.
尚、実験において素地の厚みはすべて乾燥素地の厚み
を測定した。厳密には脱型時の厚みで表示するのが妥当
であるが、一重鋳込み部、二重鋳込み部の収縮の率差は
殆ど無視でき、且つ脱型直後の素地は柔かすぎて測定し
にくいので上記のようにした。In the experiment, the thickness of the green body was measured as the thickness of the dry green body. Strictly speaking, it is appropriate to display the thickness at the time of demolding, but the difference in shrinkage between the single cast part and the double cast part can be almost ignored, and the substrate immediately after demolding is too soft and difficult to measure. So I did it above.
［実験例１］ （表１）に示す条件において、二重鋳込み部厚み、一
重鋳込み部厚み及び泥圧を各種組合せ、それぞれの組合
せについて10個づつ成形し乾燥せしめた。乾燥方法は脱
型後、25℃の室内に20時間放置し、その後45℃の乾燥室
内で24時間乾燥せしめた。[Experimental Example 1] Under the conditions shown in (Table 1), various combinations of the thickness of the double casting portion, the thickness of the single casting portion, and the mud pressure were formed, and 10 pieces of each combination were molded and dried. After the mold was removed from the mold, it was left in a room at 25 ° C for 20 hours and then dried in a drying room at 45 ° C for 24 hours.
製品としては、第２図で示したものである。 The product is the one shown in FIG.
［表１］ スリップ；粘度、陶石、長石を主成分とし、比重1.7の
もの 型；多孔性樹脂型 二重鋳込み部;7・８・９・10・11・12・13・14 15［m
m］ 一重鋳込み部;7・８・９・10・11・12・13［mm］ 泥圧;5・10・15・20［kgf/cm2］ 上記の実験による結果を第７図のグラフに示す。グラ
フ中斜線で表わした範囲が歩留り70％以上の部分であ
る。[Table 1] Slip: viscosity, porcelain stone, feldspar as the main component and specific gravity of 1.7 Mold; porous resin mold Double cast part; 7/8/9/10/11/11/12/13/14 15 [m
m] Single cast part; 7/8/9/10/11/11/12/13 [mm] Mud pressure; 5/10/15/20 [kgf / cm 2 ] The results of the above experiment are shown in the graph in Fig. 7. Show. The shaded area in the graph is the area where the yield is 70% or more.
［実験例２］ （表２）に示す条件において、各条件を前記同様組合
せ、各組合せについて10個づつ成形し乾燥せしめた。乾
燥方法は脱型後、30℃の室内に48時間放置し、その後45
℃の乾燥室内で24時間乾燥せしめた。[Experimental Example 2] Under the conditions shown in (Table 2), each condition was combined in the same manner as described above, 10 pieces were formed for each combination, and dried. After demolding, leave the product in a room at 30 ° C for 48 hours and then 45
It was dried in a drying chamber at ℃ for 24 hours.
製品としては、第４図で示したものである。 The product is the one shown in FIG.
（表２） スリップ；粘度、陶石、長石を主成分とし、比重1.77の
もの 型；多孔性樹脂型 二重鋳込み部;9［mm］ 一重鋳込み部;6.5・７・7.5・８・8.5・９・10・11・12
・13・14・15・16［mm］ 泥圧;10・20［kgf/cm2］ 上記の実験による結果を第８図のグラフに示す。グラ
フ中斜線で表わした範囲が歩留70％以上の部分である。(Table 2) Slip: viscosity, porcelain stone, feldspar as the main component and specific gravity of 1.77 Mold: Porous resin type Double cast part: 9 [mm] Single cast part: 6.5 ・ 7 ・ 7.5 ・ 8 ・ 8.5 ・9/10/11/12
・ 13 ・ 14 ・ 15 ・ 16 [mm] Mud pressure; 10 ・ 20 [kgf / cm 2 ] The result of the above experiment is shown in the graph of FIG. The shaded area in the graph is the area where the yield is 70% or more.
以上の実施例及び実験例にあっては一重鋳込み部と二
重鋳込み部との境界部付近における厚みについて述べて
きたが、境界部付近以外の部分の厚みについては、製品
の強度又は構造上の必要性から異なる値となってもよ
い。In the above examples and experimental examples, the thickness in the vicinity of the boundary between the single cast part and the double cast part has been described, but the thickness of the part other than the vicinity of the boundary is in terms of the strength or the structure of the product. The value may be different depending on the necessity.
第７図、第８図からも明らかなように、クラックを生
じにくくするにはT1/T2を82/100よりも大きくする必要
があり、また泥圧が４〜8kgf/cm2ではT1/T2を82/100〜1
15/100、泥圧が７〜13kgf/cm2ではT1/T2を85/100〜125/
100、泥圧が12〜18kgf/cm2ではT1/T2を100/100〜135/10
0、泥圧が17〜23kgf/cm2ではT1/T2を115/100〜150/100
となるように、泥圧を高くするにつれてT1/T2も大きく
するものが好ましい。As is clear from Figs. 7 and 8, T1 / T2 needs to be larger than 82/100 in order to prevent cracks from occurring, and T1 / T2 is required at mud pressure of 4 to 8 kgf / cm 2. 82/100 ~ 1
T1 / T2 is 85 / 100-125 / at 15/100 and mud pressure of 7-13kgf / cm 2.
100, mud pressure 12 to 18 kgf / cm 2 T1 / T2 100/100 to 135/10
0, mud pressure of 17-23kgf / cm 2 T1 / T2 115 / 100-150 / 100
Therefore, it is preferable to increase T1 / T2 as the mud pressure increases.
（発明の効果） 以上に説明したように本願発明によれば、衛生陶器等
の大型で複雑な形状を有し、且つ一重鋳込み部と二重鋳
込み部を併せ持つ陶磁器を成形時にクラックを生じるこ
となく歩留り良く製造することができ、しかも効率よく
成形することができる。(Effects of the Invention) As described above, according to the present invention, a ceramic having a large and complicated shape such as sanitary ware and having both a single cast portion and a double cast portion does not cause cracks during molding. It can be manufactured with high yield and can be molded efficiently.
第１図は本発明方法を実施する成形装置の断面図、第２
図は成形された洗面ボールの断面図、第３図は第２図の
一部拡大図、第４図は水洗便器タンクの蓋の断面図、第
５図は含水率と素地厚み関係を示すグラフ、第６図は含
水率と泥圧の関係を示すグラフ、第７図及び第８図は実
験結果を示すグラフである。 尚、図面中1a,1bは鋳型、３はスリップ、4,5は焼結前の
成形品、4a,5aは一重鋳込み部、4b,5bは二重鋳込み部、
T1は一重鋳込み部の厚さ、T2は二重鋳込み部の厚さであ
る。FIG. 1 is a sectional view of a molding apparatus for carrying out the method of the present invention, and FIG.
Figure is a cross-sectional view of the molded wash-basin, Figure 3 is a partially enlarged view of Figure 2, Figure 4 is a cross-sectional view of the toilet bowl tank lid, and Figure 5 is a graph showing the relationship between water content and substrate thickness. FIG. 6 is a graph showing the relationship between water content and mud pressure, and FIGS. 7 and 8 are graphs showing experimental results. In the drawings, 1a and 1b are molds, 3 is slip, 4,5 are molded products before sintering, 4a and 5a are single cast parts, 4b and 5b are double cast parts,
T1 is the thickness of the single cast part, and T2 is the thickness of the double cast part.
Claims (2)
器の加圧鋳込み成形方法において、前記一重鋳込み部の
乾燥素地の厚さをT1、二重鋳込み部の乾燥素地の厚さを
T2とすると、それぞれの鋳込み部の境界付近ではT1/T2
≧82/100となるようにしたことを特徴とする陶磁器の加
圧鋳込み成形方法。1. A method for pressure casting a ceramic having a single cast portion and a double cast portion, wherein the thickness of the dry base material of the single cast portion is T1, and the thickness of the dry base material of the double cast portion is T1.
Assuming T2, T1 / T2 near the boundary of each casting
A method for pressure casting of ceramics, characterized in that ≧ 82/100.
くするようにした請求項１に記載の陶磁器の加圧鋳込み
成形方法。2. The method for pressure casting of ceramics according to claim 1, wherein the T1 / T2 is increased as the mud pressure is increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63019059A JP2558779B2 (en) | 1988-01-29 | 1988-01-29 | Pressure casting method for ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63019059A JP2558779B2 (en) | 1988-01-29 | 1988-01-29 | Pressure casting method for ceramics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01195003A JPH01195003A (en) | 1989-08-04 |
| JP2558779B2 true JP2558779B2 (en) | 1996-11-27 |
Family
ID=11988860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63019059A Expired - Lifetime JP2558779B2 (en) | 1988-01-29 | 1988-01-29 | Pressure casting method for ceramics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2558779B2 (en) |
-
1988
- 1988-01-29 JP JP63019059A patent/JP2558779B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01195003A (en) | 1989-08-04 |
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