JP2003127120A - Mold for molding ceramics and method for manufacturing the same - Google Patents
Mold for molding ceramics and method for manufacturing the sameInfo
- Publication number
- JP2003127120A JP2003127120A JP2001329029A JP2001329029A JP2003127120A JP 2003127120 A JP2003127120 A JP 2003127120A JP 2001329029 A JP2001329029 A JP 2001329029A JP 2001329029 A JP2001329029 A JP 2001329029A JP 2003127120 A JP2003127120 A JP 2003127120A
- Authority
- JP
- Japan
- Prior art keywords
- molding
- weight
- parts
- mold
- gypsum
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00939—Uses not provided for elsewhere in C04B2111/00 for the fabrication of moulds or cores
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は陶磁器製品を鋳込み
成形等により成形するときに用いる陶磁器成形用型及び
その製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramics molding die used when molding a ceramics product by casting or the like, and a method for producing the same.
【０００２】[0002]
【従来の技術】石膏は古代エジプト時代から構造物の建
築助剤として使用されてきて以来、セメント保存時の安
定剤、建設資材、農業用、顔料等の各種産業や精密な加
工を伴う金属精密鋳造、美術工芸、外科医療、歯科、陶
磁器工業等の分野で幅広く使用されている。BACKGROUND OF THE INVENTION Since plaster has been used as a construction aid for structures since ancient Egypt, it has been used in various industries such as stabilizers for cement preservation, construction materials, agriculture, pigments, etc. Widely used in the fields of casting, arts and crafts, surgical medicine, dentistry, and the ceramics industry.
【０００３】陶磁器の素地成形に使用される石膏型は半
水石膏を出発原料として、これに適量の水を加え攪拌混
合し、このスラリーを型成形用母型に鋳込み成形するこ
とにより得られる。この場合、スラリ−は水和反応を経
て短時間で二水石膏に変態し凝結固化する。当該スラリ
−は均質性と流動性が高く、鋳込むことで母型内では均
質に充填され固化する特徴がある。このようにして得ら
れた石膏型は型写しが高精度であり、更に、成形や加工
等が容易である等の特性により汎用資材として使用され
ている。A gypsum mold used for molding a ceramic body is obtained by using hemihydrate gypsum as a starting material, adding an appropriate amount of water thereto, stirring and mixing the mixture, and casting the slurry into a molding die for molding. In this case, the slurry undergoes a hydration reaction and transforms into gypsum dihydrate in a short time and solidifies and solidifies. The slurry has high homogeneity and fluidity, and is characterized by being uniformly filled and solidified in the mother die by casting. The gypsum mold thus obtained is used as a general-purpose material because of its characteristics such that the mold copy is highly accurate and the molding and processing are easy.
【０００４】近年、陶磁器の素地成形方法が多様化し、
成形用型に各種機能が求められている。それらの課題に
対して原料石膏に、有機系若しくは無機系繊維を混合し
たり或いは無機質粉末を混合したりして硬度や耐摩耗性
或いは抗折強度等の機械的強度を向上させた製品開発が
なされている。In recent years, ceramic molding methods have been diversified,
Various functions are required for molding dies. To solve these problems, it is necessary to develop a product that improves the mechanical strength such as hardness, abrasion resistance, and bending strength by mixing raw gypsum with organic or inorganic fibers or inorganic powder. Has been done.
【０００５】例えば、特開平６−１５７１１７号、特開
平６−１５５４２６号には、母材の石膏組織内に炭素繊
維を混入分散することにより機械的強度を増大した成形
用石膏型等が開示されている。また特開平7-２４６６０
９号には、石膏にゼオライト粉末を含有させることによ
り型密度を増大させ、それにより機械的強度を向上させ
た成形用石膏型が開示されている。For example, JP-A-6-157117 and JP-A-6-155426 disclose molding gypsum molds having increased mechanical strength by mixing and dispersing carbon fiber in the gypsum structure of the base material. ing. In addition, JP-A-7-24660
No. 9 discloses a gypsum mold for molding in which the gypsum contains zeolite powder to increase the mold density and thereby improve the mechanical strength.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、従来の
石膏型においては成形面が水に溶解することによる耐久
性の低下という問題がある。即ち、石膏は水に対して難
溶性ではあるが水に対する溶解性を示すため、陶磁器素
地成形の際、成形材料と接する型表面即ち、成形面が成形
材料中の水を吸収して僅かに溶解する。そして、同一石
膏型による繰り返し成形の回数が増えることにより、そ
の溶解量が次第に増大し、それに伴って成形面の空間内
容積が大きくなり、該内容積が変動することになる。そ
の結果、成形体である陶磁器素地の寸法や形状に誤差が
生じ、均質なものが得られないという問題がある。例え
ば、徳利形状の容器を成形するに当たって同一石膏型で
１００回成形を繰り返し、１００個製作した場合、成形
回数の増大に伴って容器の外形寸法が次第に大きくなる
という不具合を生じる。そのため同一型による成形回数
にも自ずと限界があり、比較的早期に型の破棄を余儀な
くされ、耐久性に劣るものであった。However, the conventional gypsum mold has a problem that the molding surface is dissolved in water and the durability is lowered. That is, gypsum is poorly soluble in water, but exhibits solubility in water.Therefore, during molding of the ceramic body, the mold surface in contact with the molding material, that is, the molding surface absorbs water in the molding material and slightly dissolves. To do. Then, as the number of times of repeated molding with the same gypsum mold increases, the melting amount thereof gradually increases, and accordingly, the internal volume of the space of the molding surface increases, and the internal volume fluctuates. As a result, there is a problem in that an error occurs in the size and shape of the ceramic body that is a molded body, and a homogeneous product cannot be obtained. For example, when forming a bottle having a sake bottle shape, the same gypsum mold is repeatedly formed 100 times to produce 100 pieces, which causes a problem that the outer dimension of the container gradually increases as the number of forming times increases. Therefore, the number of times of molding with the same mold is naturally limited, and the mold must be discarded relatively early, resulting in poor durability.
【０００７】また、従来の石膏型は耐摩耗性の面でも充
分とはいえない。例えばローラーマシン成形法により皿
形状の容器を成形するに当たって回転盤上で陶土を円錐
ローラー状のヘラで型表面に押し付けながら成形するの
で、型表面は大きな応力を受ける。そのため型表面が摩
耗し、成形回数の増大に伴って型表面の摩耗度は次第に
大きくなり、成形精度の低下、成形体の寸法の不均一と
いう問題を生じる。このように従来の石膏型は耐摩耗性
が充分ではないという点からも同一型による繰り返し成
形回数に自ずと限界があり、耐久性の改善が望まれてい
た。Further, the conventional gypsum mold is not sufficient in terms of abrasion resistance. For example, when forming a dish-shaped container by the roller machine molding method, the clay is pressed on the mold surface with a conical roller-shaped spatula on a rotating plate, and therefore the mold surface is greatly stressed. Therefore, the mold surface is worn, and the degree of wear of the mold surface gradually increases as the number of molding times increases, which causes problems such as deterioration of molding accuracy and non-uniformity of the size of the molded body. As described above, the conventional plaster mold has a limit in the number of times of repeated molding with the same mold in view of insufficient wear resistance, and improvement in durability has been desired.
【０００８】更に従来においては石膏型の取り扱い時に
外力により該石膏型が破損するという問題があり、強度
の面で技術改良がなされたといっても決して充分満足で
きるものではなかった。Further, in the past, there was a problem that the gypsum mold was damaged by an external force when the gypsum mold was handled, and technical improvement in terms of strength was never satisfactory.
【０００９】また、従来の石膏型においては熱特性は４
１℃以下が安定域で、それ以上の温度域では敏感に半水
石膏に変態し強度等の物性が低下するため、素地成形に
使用されて湿潤状態にある石膏型を乾燥して再度成形に
使用するに当たり、その乾燥温度は４１℃以下に制限さ
れ、そのため乾燥に時間がかかり、成形サイクルの効率
が悪いものであった。The conventional gypsum mold has a thermal property of 4
The stable range is 1 ° C or lower, and the physical properties such as strength are deteriorated in the stable range in the temperature range higher than that, and the physical properties such as strength are deteriorated. Therefore, the gypsum mold in the wet state used for forming the base is dried and re-formed. In use, the drying temperature was limited to 41 ° C. or lower, which took time to dry and the molding cycle was inefficient.
【００１０】本発明は従来の石膏型が有している問題点
を解決しようとするものであり、成形面の空間内容積の
変動を抑止して耐久性を向上し、且つ耐摩耗性、機械的
強度及び耐熱性を向上させた陶磁器成形用型及びその製
造方法を提供することを目的とするものである。The present invention is intended to solve the problems of the conventional gypsum mold, and suppresses fluctuations in the space volume of the molding surface to improve durability, wear resistance, and mechanical properties. An object of the present invention is to provide a ceramics molding die having improved mechanical strength and heat resistance, and a method for producing the same.
【００１１】[0011]
【課題を解決するための手段】本発明は珪酸質鉱物、セ
メント、石膏からなる材料にて形成してなることを特徴
とする陶磁器成形用型である。SUMMARY OF THE INVENTION The present invention is a ceramics molding die characterized by being formed of a material comprising siliceous mineral, cement and gypsum.
【００１２】本発明成形用型を構成する上記材料には、
平均粒径が０．１μｍ以上、２μｍ未満の珪酸質微粒子
及び／又は繊維質鉱物を配合することができる。この珪
酸質微粒子及び／又は繊維質鉱物の配合により、硬化速
度、気孔率、吸水率及び表面粗さ等の多孔質特性を調整
することができると共に、型の寸法精度を調整でき、更
には鋳込成形時における陶磁器素地の離型を容易ならし
めることができる。The above materials constituting the molding die of the present invention include:
Silica fine particles and / or fibrous minerals having an average particle size of 0.1 μm or more and less than 2 μm can be blended. By mixing the siliceous fine particles and / or the fibrous mineral, it is possible to adjust the porous characteristics such as the curing rate, the porosity, the water absorption rate and the surface roughness, and the dimensional accuracy of the mold. It is possible to easily release the ceramic base material at the time of molding.
【００１３】本発明成形型における材料組成は、珪酸質
鉱物４０〜７０重量部、セメント１０〜４０重量部、石
膏２〜２５重量部である。The material composition of the mold of the present invention is 40 to 70 parts by weight of siliceous mineral, 10 to 40 parts by weight of cement, and 2 to 25 parts by weight of gypsum.
【００１４】これらの材料に上記した珪質微粒子及び繊
維質鉱物を配合する場合の本発明材料組成は、珪酸質鉱
物４０〜７０重量部、セメント１０〜４０重量部、石膏
２〜２５重量部、上記珪酸質微粒子１〜１０重量部、繊
維質鉱物０．２〜５重量部である。When the above-mentioned siliceous fine particles and fibrous mineral are blended with these materials, the material composition of the present invention is 40 to 70 parts by weight of siliceous mineral, 10 to 40 parts by weight of cement, 2 to 25 parts by weight of gypsum, The silica fine particles are 1 to 10 parts by weight, and the fibrous mineral is 0.2 to 5 parts by weight.
【００１５】本発明の陶磁器成形用型を製造するに当っ
ては、まず、珪酸質鉱物４０〜７０重量部、セメント１
０〜４０重量部、石膏２〜２５重量部に水３５〜６０重
量部を加えて混合し、スラリーを作る。次いで、得られ
たスラリーを型成形用母型の成型用空間に鋳込み、硬化
させ、脱型して成形体（成形用型）を得る。In producing the mold for ceramics of the present invention, first, 40 to 70 parts by weight of siliceous mineral and 1 part of cement are used.
0 to 40 parts by weight and 2 to 25 parts by weight of gypsum are mixed with 35 to 60 parts by weight of water to form a slurry. Then, the obtained slurry is cast into the molding space of the mold for molding, cured, and released to obtain a molded body (molding die).
【００１６】本発明成形型が上記の珪酸質微粒子及び繊
維質鉱物を含む場合において本発明成形型を製造するに
当っては、まず、珪酸質鉱物４０〜７０重量部、セメン
ト１０〜４０重量部、石膏２〜２５重量部、上記珪酸質
微粒子１〜１０重量部、繊維質鉱物０．２〜５重量部に
水３５〜６０重量部を加えて混合し、スラリーを作る。
次いで、得られたスラリーを型成形用母型の成型用空間
に鋳込み、硬化させ、脱型して成形体（成形用型）を得
る。In the case where the mold of the present invention contains the above-mentioned siliceous fine particles and fibrous mineral, when manufacturing the mold of the present invention, first, 40 to 70 parts by weight of siliceous mineral and 10 to 40 parts by weight of cement. 2 to 25 parts by weight of gypsum, 1 to 10 parts by weight of the above-mentioned siliceous fine particles, and 0.2 to 5 parts by weight of fibrous mineral are added and mixed with 35 to 60 parts by weight of water to form a slurry.
Then, the obtained slurry is cast into the molding space of the mold for molding, cured, and released to obtain a molded body (molding die).
【００１７】[0017]
【発明の実施の形態】本発明の陶磁器成形用型は珪酸質
鉱物、セメント及び石膏からなるが、更にこれらに平均
粒径が０．１μｍ以上、２μｍ未満の珪酸質微粒子及び
／又は繊維質鉱物を配合することが好ましい。即ち、本
発明において珪酸質鉱物、セメント及び石膏が基本的な
材料成分であり、これらに上記珪酸質微粒子、繊維質鉱
物のうちのいずれか一方或いは両方を配合することがで
きる。BEST MODE FOR CARRYING OUT THE INVENTION The mold for porcelain molding of the present invention comprises siliceous minerals, cement and gypsum, and further contains silicic acid fine particles and / or fibrous minerals having an average particle size of 0.1 μm or more and less than 2 μm. Is preferably blended. That is, in the present invention, siliceous minerals, cement and gypsum are basic material components, and either one or both of the above siliceous fine particles and fibrous minerals can be added to these.
【００１８】本発明における珪酸質鉱物としては粘土成
分が少ない鉱物が好ましく、珪石や長石等の花崗岩類や
蝋石及び珪酸質砂岩等が挙げられる。珪酸質鉱物の主成
分はSiO２であり、この主成分SiO２の含有量としては６
２％以上が好ましい。As the siliceous mineral in the present invention, minerals having a small amount of clay component are preferable, and examples thereof include granites such as silica stone and feldspar, wax stones and siliceous sandstone. The main component of siliceous mineral is SiO 2 , and the content of this main component SiO 2 is 6
2% or more is preferable.
【００１９】本発明において珪酸質鉱物は粒状のものが
用いられ、その平均粒子径は２〜１００μｍが好まし
い。平均粒子径が１００μｍを越えると、本発明成形用
型の全細孔比表面積を大きくすることが困難となり、ま
た吸水率を向上することも困難となる。一方、珪酸質鉱
物は硬質であるため汎用の粉砕機器で微粉砕することは
極めて困難であり、コスト高となるため平均粒子径が２
μｍ未満のものを用いることは経済的に得策ではない。In the present invention, the siliceous mineral is granular and its average particle size is preferably 2 to 100 μm. When the average particle diameter exceeds 100 μm, it becomes difficult to increase the total pore specific surface area of the molding die of the present invention, and it is also difficult to improve the water absorption. On the other hand, since siliceous minerals are hard, it is extremely difficult to finely pulverize them with a general-purpose pulverizing machine, and the cost is high, so the average particle size is 2
It is not economically expedient to use one having a thickness of less than μm.
【００２０】本発明において珪酸質鉱物の更に好ましい
平均粒子径は３〜６０μｍである。In the present invention, the more preferable average particle diameter of the siliceous mineral is 3 to 60 μm.
【００２１】本発明におけるセメントとして、ポルトラ
ンドセメント、白色ポルトランドセメント、早強ポルト
ランドセメント、中庸熱ポルトランドセメント、高炉セ
メント、シリカセメント、フライアッシュセメント、ア
ルミナセメント、マグネシアセメント等が挙げられ、な
かでもポルトランドセメント、白色ポルトランドセメン
ト、早強ポルトランドセメント、シリカセメントが好ま
しい。Examples of the cement in the present invention include Portland cement, white Portland cement, early-strength Portland cement, medium heat Portland cement, blast furnace cement, silica cement, fly ash cement, alumina cement, magnesia cement, and the like. , White Portland cement, early strength Portland cement and silica cement are preferred.
【００２２】石膏としては従来の石膏型に用いられてい
る材料と同様の材料を用いることができる。As the gypsum, the same material as that used in the conventional gypsum mold can be used.
【００２３】平均粒径が０．１μｍ以上、２μｍ未満の
珪酸質微粒子は本発明成形用型の多孔質特性を調整する
ために適宜配合される。ここで多孔質特性とは、硬化速
度、気孔率、吸水率及び表面粗さ等の性質をいう。この
珪酸質微粒子としては、シリカヒューム、ホワイトカー
ボン等が挙げられるが、シリカヒュームが好ましい。シ
リカヒュームとしては、シリコン系半導体用素材の製造
時に得られる副産物或いはシリコンメタル又はフェロシ
リコンの製造時に電気炉から収集される副産物を用いる
ことができ、主な結晶相はクリストバライトのみで主成
分のSiO2含有量は９０％以上である。Silica fine particles having an average particle size of 0.1 μm or more and less than 2 μm are appropriately blended in order to adjust the porous characteristics of the molding die of the present invention. Here, the porous characteristics refer to properties such as curing rate, porosity, water absorption rate and surface roughness. Examples of the siliceous fine particles include silica fume and white carbon, but silica fume is preferable. As the silica fume, a by-product obtained at the time of manufacturing a silicon-based semiconductor material or a by-product collected from an electric furnace at the time of manufacturing silicon metal or ferro-silicon can be used, and the main crystalline phase is only cristobalite and the main component is SiO 2. 2 Content is 90% or more.
【００２４】上記珪酸質微粒子の平均粒径を０．１μｍ
以上、２μｍ未満としたのは、平均粒径が０．１μｍ未
満では吸水率の向上に寄与できず、また工程における粉
塵発生など取扱い上の不具合を生じ、一方、平均粒径が
２μｍ以上では全細孔比表面積の増大並びに吸水率の向
上に寄与できないからである。上記珪酸質微粒子の好ま
しい平均粒径は０．１〜０．３μｍである。The average particle diameter of the siliceous fine particles is 0.1 μm.
Above 2 μm means that when the average particle size is less than 0.1 μm, it cannot contribute to the improvement of the water absorption rate and also causes handling problems such as dust generation in the process. On the other hand, when the average particle size is 2 μm or more, This is because it cannot contribute to the increase of the pore specific surface area and the improvement of the water absorption. The preferable average particle size of the siliceous fine particles is 0.1 to 0.3 μm.
【００２５】また本発明成形用型の多孔質特性を調整す
るため繊維質鉱物を配合することが好ましい。この繊維
質鉱物としては、セピオライト、アタパルジャイト等が
挙げられるが、セピオライトが好ましい。セピオライト
はMgO− SiO２−H２Oを主成分とするマグネシウム珪酸
塩で微細な粒径を持ち、長さ０．２〜２μｍの繊維を束
ねた状態の構造を有し、粒子形状としては微細な繊維状
形態を有し、水に対して非常に分散性が良い。セピオラ
イト、アタパルジャイトはボールミル等の粉砕機を用い
て微細化でき、セピオライトの場合は、微細化により束
ねた繊維がほぐされて小繊維化される。In order to adjust the porous characteristics of the molding die of the present invention, it is preferable to add a fibrous mineral. Examples of this fibrous mineral include sepiolite and attapulgite, and sepiolite is preferable. Sepiolite MgO-SiO 2 -H has fine particle size of 2 O with magnesium silicate as a main component has a structure of being integrated fiber length 0.2 to 2 .mu.m, fine as particle shape It has a good fibrous morphology and is very dispersible in water. Sepiolite and attapulgite can be miniaturized by using a crusher such as a ball mill, and in the case of sepiolite, the bundled fibers are loosened by the miniaturization to be made into small fibers.
【００２６】本発明成形用型の材料組成は珪酸質鉱物４
０〜７０重量部、セメント１０〜４０重量部、石膏２〜
２５重量部である。珪酸質鉱物の配合量が４０重量部未
満では吸水性を向上できず、また成形型製造時に成形体
の収縮を招き、型成形用母型からの脱型が困難で亀裂が
発生し易くなる。一方、７０重量部を越えるとスラリー
の硬化速度が遅くなり且つ強度低下を招く虞がある。The material composition of the molding die of the present invention is siliceous mineral 4
0-70 parts by weight, cement 10-40 parts by weight, gypsum 2-
25 parts by weight. If the content of the siliceous mineral is less than 40 parts by weight, the water absorption cannot be improved, and the molded product is contracted during the production of the molding die, and it is difficult to remove the die from the die for molding, and cracks are likely to occur. On the other hand, if it exceeds 70 parts by weight, the curing rate of the slurry may be slow and the strength may be lowered.
【００２７】セメントの配合量が１０重量部未満では耐
久性、機械的強度及び耐熱性を向上できず、４０重量部
を越えると吸水性に劣るものとなる。If the content of cement is less than 10 parts by weight, the durability, mechanical strength and heat resistance cannot be improved, and if it exceeds 40 parts by weight, the water absorption becomes poor.
【００２８】石膏の配合量が２重量部未満では珪酸質鉱
物とセメントの二成分系モルタルの収縮を防止できない
上、均質な成形体（成形用型）を得ることができない。
一方、２５重量部を越えると成形面の空間内容積の変動
を抑止できず、成形精度及び耐久性が劣化する。If the amount of plaster is less than 2 parts by weight, the shrinkage of the binary mortar of siliceous mineral and cement cannot be prevented, and a homogeneous compact (molding die) cannot be obtained.
On the other hand, if the amount exceeds 25 parts by weight, it is not possible to suppress the variation of the volume in the space of the molding surface, and the molding accuracy and durability deteriorate.
【００２９】本発明は上記材料組成に、平均粒径が０．
１μｍ以上、２μｍ未満の珪酸質微粒子及び／又は繊維
質鉱物を配合することができる。本発明は上記珪酸質微
粒子のみを配合しても或いは繊維質鉱物のみを配合して
もよく、更には両者を共に配合してもよい。いずれの場
合においても上記珪酸質微粒子の配合量は１〜１０重量
部、繊維質鉱物の配合量は０．２〜５重量部である。上
記珪酸質微粒子の配合量が１重量部未満では吸水性を向
上できない。また、１０重量部を越えるとスラリーの適
正な流動性を付与するために混水量が多量となり、成形
体（成形用型）の強度低下に繋がる。また繊維質鉱物の
配合量が０．２重量部未満では各材料の均質分散効果が
なく、均質な成形体（成形用型）を得ることができず、
５重量部を越えると珪酸質微粒子の場合と同様にスラリ
ーの適正な流動性を付与するために混水量が多量とな
り、成形体（成形用型）の強度低下に繋がり、更に硬化
に長時間を要する。本発明成形用型の多孔質特性を良好
に調整する意味において上記珪酸質微粒子と繊維質鉱物
の両方を配合することが好ましい。The present invention has the above material composition and an average particle size of 0.
Silica fine particles of 1 μm or more and less than 2 μm and / or fibrous minerals can be blended. In the present invention, only the above-mentioned siliceous fine particles may be blended, or only fibrous minerals may be blended, or both may be blended together. In any case, the amount of siliceous fine particles is 1 to 10 parts by weight, and the amount of fibrous mineral is 0.2 to 5 parts by weight. If the amount of the silica fine particles is less than 1 part by weight, the water absorption cannot be improved. On the other hand, if it exceeds 10 parts by weight, the amount of mixed water becomes large in order to impart appropriate fluidity to the slurry, leading to a decrease in strength of the molded body (molding die). When the amount of the fibrous mineral is less than 0.2 parts by weight, there is no homogeneous dispersion effect of each material, and a homogeneous molded body (molding die) cannot be obtained.
If the amount exceeds 5 parts by weight, the amount of water mixed becomes large in order to impart appropriate fluidity to the slurry as in the case of silicic acid fine particles, leading to a decrease in strength of the molded body (molding die), and further hardening takes a long time. It costs. In the sense that the porous characteristics of the molding die of the present invention are well adjusted, it is preferable to incorporate both the above-mentioned siliceous fine particles and the fibrous mineral.
【００３０】本発明成形用型は多孔質体であるが、本発
明は珪酸質鉱物を含有することにより、極めて微細な細
孔を有する多孔質体を得ることができ、それにより高い
吸水性能を得ることができる。また材料組成中に平均粒
径が０．１μｍ以上、２μｍ未満の珪酸質微粒子を配合
すれば，更に一段と微細な細孔構造を有する多孔質体を
得ることができ、全細孔比表面積を増大して吸水性能を
より一層向上することができる。また珪酸質微粒子を含
有させることにより、成形用型の表面粗さを平滑化す
る。更に珪酸質微粒子とセメントとの間で起こるポゾラ
ン反応は早期に進行するため珪酸質微粒子は成形用型製
造工程において成形体（成形用型）の硬化速度を早める
作用がある。上記した珪酸質微粒子の作用は特にシリカ
ヒュームにおいて顕著に発揮される。Although the molding die of the present invention is a porous body, the present invention can obtain a porous body having extremely fine pores by containing a siliceous mineral, whereby a high water absorption performance can be obtained. Obtainable. Further, by adding silicic acid fine particles having an average particle diameter of 0.1 μm or more and less than 2 μm to the material composition, a porous body having a finer pore structure can be obtained, and the total pore specific surface area is increased. Thus, the water absorption performance can be further improved. Moreover, the surface roughness of the molding die is smoothed by containing the siliceous fine particles. Furthermore, since the pozzolanic reaction that occurs between the siliceous fine particles and the cement proceeds early, the siliceous fine particles have the effect of accelerating the curing speed of the molded body (molding die) in the molding die manufacturing process. The above-mentioned action of the siliceous fine particles is remarkably exhibited especially in silica fume.
【００３１】本発明の構成材料である珪酸質鉱物とセメ
ントとのポゾラン反応によって生成する硬化物は水に不
溶性の物質であるから、成形精度及び耐久性を向上でき
る。即ち、本発明成形用型を用いて陶磁器素地を成形す
る際に、成形用型は陶土、泥漿等の成形用材料からの水
を吸収し湿潤状態になるが、成形用型は珪酸質鉱物とセ
メントとのポゾラン反応硬化物、即ちモルタル質からな
るから水に不溶性の性質を示し、そのため成形面が水に
より溶解することが抑止される。Since the cured product produced by the pozzolanic reaction between the siliceous mineral and the cement, which is the constituent material of the present invention, is a water-insoluble substance, the molding accuracy and durability can be improved. That is, when molding a ceramic body using the molding die of the present invention, the molding die absorbs water from the molding material such as clay, slurry, etc. to be in a wet state, but the molding die is a siliceous mineral. Since it is a cured product of the pozzolanic reaction with cement, that is, it is made of mortar, it exhibits water-insoluble properties, so that the molding surface is prevented from being dissolved by water.
【００３２】本発明の構成材料は石膏を含んでおり、こ
の石膏は水に対して溶解性を示すが、水に不溶性のモル
タル質が成形用型の基本骨格を形作るため石膏が水に溶
解しても型の基本骨格は水に溶解せず、物理的に変動し
ない。従って、同一の成形型を用いて陶磁器素地を繰り
返し成形し、その成形回数が多数回になっても型の成形
面の空間内容積がほとんど変動することがなく、その結
果、多数個製作された陶磁器素地はいずれも形状、寸法
において誤差がなく均質なものが得られる。珪酸質鉱物
４０〜７０重量部、セメント１０〜４０重量部、石膏２
〜２５重量部という材料組成はこのような作用効果を確
実にもたらすものである。The constituent material of the present invention contains gypsum, and this gypsum is soluble in water, but since the water-insoluble mortar substance forms the basic skeleton of the molding die, the gypsum dissolves in water. However, the basic skeleton of the mold does not dissolve in water and does not physically change. Therefore, even if the ceramic body is repeatedly molded using the same molding die, and the number of molding times is large, the space volume of the molding surface of the mold hardly fluctuates, and as a result, many pieces are manufactured. As for the ceramic base material, uniform shape and size can be obtained without any error. 40-70 parts by weight of siliceous mineral, 10-40 parts by weight of cement, gypsum 2
The material composition of ˜25 parts by weight surely brings about such effects.
【００３３】本発明は構成材料中に珪酸質鉱物及びセメ
ントを含有するので成形用型の製造工程において水の存
在下でポゾラン反応が生起し、水分の減少により針状結
晶の硬化体が得られる。このように本発明はモルタル質
構造体であるから、上記した水不溶性という性質がある
他、耐摩耗性や機械的強度に優れたものとなり、更に耐
熱性においても従来の石膏型に比べて格段に向上する。Since the present invention contains siliceous minerals and cement in the constituent materials, a pozzolanic reaction occurs in the presence of water in the manufacturing process of the molding die, and a hardened body of needle-like crystals is obtained due to a decrease in water content. . As described above, since the present invention is a mortar structure, it has the above-mentioned water-insoluble property, and is excellent in abrasion resistance and mechanical strength, and further in heat resistance compared with the conventional gypsum mold. Improve to.
【００３４】本発明は構成材料中に石膏を含有してお
り、この石膏は分散性が良いので成形用型の製造工程に
おいてスラリー中の各材料の均一分散を図る作用があ
る。スラリー中の各材料の分散が不均一だと、得られる
成形体（成形用型）も構造的に不均一となり、強度、吸
水性能、耐熱性等において劣るものとなる。In the present invention, gypsum is contained in the constituent material, and this gypsum has a good dispersibility, so that it has an effect of uniformly dispersing each material in the slurry in the manufacturing process of the molding die. If the dispersion of each material in the slurry is non-uniform, the resulting molded body (molding die) will also be structurally non-uniform, resulting in poor strength, water absorption performance, heat resistance and the like.
【００３５】セメントの硬化には或る程度の時間がかか
るが、これに石膏を加えると硬化時間が短縮される。そ
の結果、成形体（成形用型）の保形強度が早期に付与さ
れることになるので製造時間の短縮化が図られ、製造効
率を向上できる。本発明において珪酸質鉱物は平均粒子
径が２〜１００μｍという細かい粒径のものであるた
め、珪酸質鉱物とセメントの二成分系モルタルの収縮が
起こるという問題があるが、本発明は構成材料として石
膏を加えているためこの石膏の作用によりそのような収
縮の発生を防止でき、寸法精度に優れた成形用型を得る
ことができる。Although hardening of cement takes some time, addition of gypsum shortens the hardening time. As a result, the shape retention strength of the molded body (molding die) is imparted at an early stage, so that the manufacturing time can be shortened and the manufacturing efficiency can be improved. In the present invention, since the siliceous mineral has a fine particle diameter of 2 to 100 μm, there is a problem that the two-component mortar of siliceous mineral and cement contracts. However, the present invention is a constituent material. Since gypsum is added, it is possible to prevent such shrinkage due to the action of gypsum, and it is possible to obtain a molding die having excellent dimensional accuracy.
【００３６】一般に成形用型を用いて鋳込成形により陶
磁器素地を製造するに当たり、成形された素地を成形用
型より脱型するときの離型性が問題となる。本発明にお
いて鋳込成形時に二価のカルシウムイオンが型表面に存
在し、この二価のカルシウムイオンは陶土粒子を凝集さ
せる作用があるため成形素地の離型性を良好ならしめ
る。石膏はこのような二価のカルシウムイオンの供給源
となる役割りがある。In general, when a ceramic body is manufactured by casting using a molding die, the releasability when the molded body is removed from the molding die becomes a problem. In the present invention, divalent calcium ions are present on the mold surface during cast molding, and the divalent calcium ions have a function of aggregating the clay particles, so that the mold releasability of the molding base is improved. Gypsum serves as a source of such divalent calcium ions.
【００３７】上記したように石膏は本発明成形用型の製
造時にスラリー中の各材料の均一分散を図る作用がある
が、本発明において繊維質鉱物を含有せしめることによ
りこのスラリー中の各材料の均一分散を更に一段と良好
なものとする効果がある。即ち繊維質鉱物は比表面積が
広く、結晶水を保有し親水性が高いという特性があり、
水中での解砕加工で粘稠が高く安定した分散溶液とな
り、スラリ−中の各材料粒子の動きを拘束するため各材
料の均一分散を図ることができ、それにより成形体（成
形用型）の均質化及び安定化に寄与できる効果がある。
また繊維質鉱物は製造された成形体（成形用型）の収縮
を防止する作用もある。このような繊維質鉱物の作用は
特にセピオライトにおいて顕著に発揮される。As described above, gypsum has the function of uniformly dispersing each material in the slurry during the production of the molding die of the present invention. However, by incorporating a fibrous mineral in the present invention, the content of each material in this slurry can be improved. It has an effect of further improving the uniform dispersion. That is, the fibrous mineral has a large specific surface area, possesses water of crystallization, and has a high hydrophilicity,
Disintegration process in water gives a highly viscous and stable dispersion solution, which restrains the movement of each material particle in the slurry, so that each material can be uniformly dispersed, thereby forming a molded body (molding die). There is an effect that can contribute to homogenization and stabilization of.
Further, the fibrous mineral also has an action of preventing shrinkage of the manufactured molded body (molding die). The action of such fibrous minerals is remarkably exhibited especially in sepiolite.
【００３８】本発明の好ましい実施形態は、珪酸質鉱
物、セメント、石膏、平均粒径が０．１μｍ以上、２μ
ｍ未満の珪酸質微粒子及び繊維質鉱物からなる材料にて
成形用型を形成することである。このような構成によれ
ば、ポゾラン反応に消費される珪酸成分の供給源となる
珪酸質鉱物、珪酸質微粒子が極めて微細粒子であるとい
う特徴があり、また石膏及び繊維質鉱物の作用により、
水分量を増加してもスラリー中の各材料の均一分散を図
れるという特徴があり、これらの特徴により多孔質硬化
体（成形用型）として全細孔比表面積の大きなものが得
られ、その結果、吸水性能に優れた成形用型を得ること
ができる。A preferred embodiment of the present invention is siliceous mineral, cement, gypsum, having an average particle size of 0.1 μm or more and 2 μm.
That is, the molding die is formed of a material composed of silicic fine particles of less than m and fibrous mineral. According to such a configuration, the siliceous mineral serving as the supply source of the silicic acid component consumed in the pozzolanic reaction is characterized in that the siliceous fine particles are extremely fine particles, and by the action of gypsum and the fibrous mineral,
There is a feature that each material in the slurry can be uniformly dispersed even if the amount of water is increased. Due to these features, a porous hardened body (molding die) with a large total pore specific surface area can be obtained. Thus, a molding die having excellent water absorption performance can be obtained.
【００３９】本発明の構成材料として用いることのでき
る普通ポルトランドセメント、珪石、長石、石膏、シリ
カヒュ−ム、セピオライト、アタパルジャイトの各化学
分析値を表１に示す。Table 1 shows the chemical analysis values of ordinary Portland cement, silica stone, feldspar, gypsum, silica fume, sepiolite and attapulgite which can be used as the constituent material of the present invention.
【００４０】[0040]
【表１】 [Table 1]
【００４１】上記の表１において、Ｉｇ．ｌｏｓｓは灼
熱減量を意味し、ｔｒは微量を意味する。In Table 1 above, Ig. Loss means ignition loss, and tr means a trace amount.
【００４２】本発明の成形用型を製造するに当たって
は、珪酸質鉱物４０〜７０重量部、セメント１０〜４０
重量部、石膏２〜２５重量部、平均粒径が０．１μｍ以
上、２μｍ未満の珪酸質微粒子１〜１０重量部、繊維質
鉱物０．２〜５重量部に水３５〜６０重量部を加えて混
合し、得られたスラリーを型成形用母型の成型用空間に
鋳込み、硬化させ、脱型して成形体（成形用型）を得る
ものである。水の配合量は前記の如く３５〜６０重量部
であり、この水の配合量が３５重量部未満ではスラリー
の流動性が低下し、脱泡に支障が生じ、気泡の巻込みに
よる大小の空洞の発生が顕著となる上、スラリーの型
（母型）への充填時に未充填部を生じる虞がある。一
方、６０重量部を越えるとスラリー比重が低くなり、各
構成材料が分離してスラリー中の材料の分散が均一に行
われず、得られる成形体（成形用型）の均質性が保たれ
ず、成形用型として不適切なものとなる。In producing the molding die of the present invention, 40 to 70 parts by weight of siliceous mineral and 10 to 40 of cement are used.
Parts by weight, gypsum 2 to 25 parts by weight, silica particles having an average particle size of 0.1 μm or more and less than 2 μm, 1 to 10 parts by weight, fibrous minerals 0.2 to 5 parts by weight, and water 35 to 60 parts by weight. The resulting slurry is mixed and cast into the molding space of the mold for molding, cured, and demolded to obtain a molded body (molding die). As described above, the amount of water blended is 35 to 60 parts by weight. If the amount of water blended is less than 35 parts by weight, the fluidity of the slurry will be reduced, and defoaming will be hindered. Is noticeable, and there is a possibility that an unfilled portion may occur when the slurry is filled in the mold (mother mold). On the other hand, when it exceeds 60 parts by weight, the specific gravity of the slurry becomes low, the constituent materials are separated, the materials in the slurry are not uniformly dispersed, and the homogeneity of the obtained molded body (molding die) is not maintained, It becomes unsuitable as a molding die.
【００４３】次に本発明成形用型の製造方法を図１に基
づき説明する。本発明成形用型は次の工程に従って製造
される。
１）乾式一次調合
まず珪酸質鉱物原料を湿式粉砕、分級、乾燥し、珪酸質
鉱物材料とする。これにセメントを混合して乾式一次調
合を行う（この調合されたものを一次調合品という）。
２）珪酸質微粒子材料を湿式分散処理し、珪酸質微粒子
縣濁液を得る。
３）繊維質鉱物材料を湿式解砕処理し、繊維質鉱物縣濁
液を得る。
４）湿式二次混合
上記一次調合品、水、石膏、上記珪酸質微粒子縣濁液及
び繊維質鉱物縣濁液を混合し、この湿式二次混合によっ
て均質なスラリーを得る。
５）脱泡工程
真空撹拌によって、スラリー中の気泡を除去する。
６）成形工程
型成形用母型のパーツを組み立てて母型を作り、この母
型の型内面に離型剤を塗布し、母型の鋳込口からスラリ
ーを型内に流し込み、一定時間放置してスラリーを硬化
させる。
７）脱型
硬化により得られた成形体を母型から取り出す。この場
合、母型のパーツを順次取り外すことにより容易に脱型
できる。
８）脱型された成形体をバリ取り仕上げした後、乾燥を
行う。Next, a method for manufacturing the molding die of the present invention will be described with reference to FIG. The molding die of the present invention is manufactured according to the following steps. 1) Dry primary mixing First, a siliceous mineral raw material is wet pulverized, classified and dried to obtain a siliceous mineral material. This is mixed with cement to perform a dry primary blending (this blended one is referred to as a primary blend). 2) Wet-dispersing the siliceous fine particle material to obtain a siliceous fine particle suspension. 3) Wet disintegration treatment of the fibrous mineral material to obtain a fibrous mineral suspension. 4) Wet Secondary Mixing The above primary preparation, water, gypsum, the above siliceous fine particle suspension and the fibrous mineral suspension are mixed, and a homogeneous slurry is obtained by this wet secondary mixing. 5) Defoaming step The bubbles in the slurry are removed by vacuum stirring. 6) Molding process Mold Assembling the parts of the molding master to make the master, applying the release agent to the inner surface of the master, pouring the slurry into the mold from the casting opening of the master, and leaving it for a certain period of time. To cure the slurry. 7) The molded product obtained by demolding is removed from the mother mold. In this case, it is possible to easily remove the mold by sequentially removing the parts of the mother die. 8) After demolding the demolded molded body, it is dried.
【００４４】以上の工程により本発明成形用型が製造さ
れるものである。The molding die of the present invention is manufactured by the above steps.
【００４５】本発明成形用型のＸ線回折を行った場合、
珪酸質鉱物成分及び石膏成分のピークは明瞭に現れる
が、セメント成分のピークは明瞭に現れず、ブロードと
なる。When the molding die of the present invention is subjected to X-ray diffraction,
The peaks of the siliceous mineral component and the gypsum component clearly appear, but the peaks of the cement component do not clearly appear and become broad.
【００４６】本発明成形用型は陶磁器素地成形に当たり
成形材料から吸収した水によって成形面が溶解するとい
うことがなく、この水不溶化構造により、成形を多数回
繰り返しても成形面の空間内容積が次第に大きくなると
いう現象の発生を抑止できる。また本発明成形用型は耐
摩耗性に優れ、ローラーマシン成形やロクロ成形を行っ
たとき陶土及び陶土押さえ治具のヘラによる大きな応力
を受けても容易に摩耗することがない。このような水不
溶化特性及び耐摩耗特性により、多数回成形後の成形面
の空間内容積はほとんど変動せず、それにより成形精度
を向上でき、成形用型としての優れた耐久性を実現でき
る。The molding die of the present invention does not dissolve the molding surface by the water absorbed from the molding material when molding the ceramic body, and the water-insolubilized structure allows the molding surface to have a space volume within the molding surface even when the molding is repeated many times. It is possible to prevent the phenomenon of gradually increasing. Further, the molding die of the present invention has excellent wear resistance, and does not easily wear when subjected to a large stress due to the spatula of the clay and the clay holding jig when the roller machine molding or the rokuro molding is performed. Due to such water-insolubilizing property and wear resistance property, the volumetric capacity of the molding surface after molding many times hardly changes, whereby molding accuracy can be improved and excellent durability as a molding die can be realized.
【００４７】また、本発明成形用型は機械的強度が大き
く、外力により容易に破損する虞がなく、取り扱い上も
便利である。Further, the molding die of the present invention has a large mechanical strength, is not easily damaged by an external force, and is convenient in handling.
【００４８】しかも本発明成形用型は耐熱性に優れてお
り、成形により湿潤した本発明成形用型を繰り返し使用
するための乾燥温度は特に制限されない。その結果、従
来のように４１℃以下という乾燥温度の制約がなく、乾
燥温度を短縮化でき製造効率を上昇することができる。
本発明において好ましい乾燥温度は４０℃〜８０℃であ
る。Moreover, the molding die of the present invention is excellent in heat resistance, and the drying temperature for repeatedly using the molding die of the present invention moistened by molding is not particularly limited. As a result, unlike the conventional case, there is no restriction on the drying temperature of 41 ° C. or less, and the drying temperature can be shortened and the manufacturing efficiency can be increased.
The preferred drying temperature in the present invention is 40 ° C to 80 ° C.
【００４９】本発明は鋳込成形、ローラーマシン成形、
ロクロ成形等の成形用型として好適に用いられる。The present invention is applicable to cast molding, roller machine molding,
It is preferably used as a mold for molding such as rokuro molding.
【００５０】次に本発明の実施例を示す。Next, examples of the present invention will be shown.
【００５１】実施例１
表２に示す如き材料組成により図１に示す工程に従って
各材料を調合し、混合スラリーを作った。表２における
数値は重量部を示す。また珪石としては、平均粒径が４
μｍのものを用いた。図１に示す工程に従って混合スラ
リーを型成形用母型に流し込み、硬化させて成形体を作
り、次いで脱型して成形体を型より取り出し、陶磁器成
形用型を製作した。表２に示す各種調合により、Ｎ型
１、Ｎ型２、Ｎ型３、Ｎ型４、Ｎ型５、Ｎ型６の６種類
の本発明成形用型を得た。得られた各成形用型の物性を
表３に示す。比較のため、市販の鋳込成形用型である石
膏型１（比較例１）及び市販のローラーマシン成形用型
である石膏型２（比較例２）のそれぞれの組成を表２に
示し、またそれらの物性を表３に示す。Example 1 Each material was prepared according to the process shown in FIG. 1 by the material composition shown in Table 2 to prepare a mixed slurry. The numerical values in Table 2 show parts by weight. Also, as silica stone, the average particle size is 4
The thing with a micrometer was used. According to the process shown in FIG. 1, the mixed slurry was poured into a die for molding and hardened to form a molded body, which was then demolded and the molded body was taken out from the mold to manufacture a ceramic molding die. By the various formulations shown in Table 2, six types of molding dies of the present invention of N type 1, N type 2, N type 3, N type 4, N type 5 and N type 6 were obtained. Table 3 shows the physical properties of the obtained molding dies. For the purpose of comparison, the compositions of gypsum mold 1 (comparative example 1) which is a commercially available casting mold and gypsum mold 2 (comparative example 2) which is a commercially available roller machine molding mold are shown in Table 2, and The physical properties thereof are shown in Table 3.
【００５２】[0052]
【表２】 [Table 2]
【００５３】[0053]
【表３】 [Table 3]
【００５４】表３によれば、Ｎ型１〜６は石膏型１、２
に比べて平均細孔径が小さく且つ全細孔比表面積が大き
い。それによって、Ｎ型１〜６は石膏型１、２よりも吸
水率が著しく大きくなっている。According to Table 3, N types 1 to 6 are gypsum types 1 and 2.
Has a smaller average pore diameter and a larger total pore specific surface area. As a result, the N types 1 to 6 have significantly higher water absorption than the gypsum types 1 and 2.
【００５５】実施例２
Ｎ型１〜６及び石膏型１、２を、着色した水を入れた水
槽中に浸し、水の拡散速度として浸漬後１０分経過後の
湿潤高さを測定した。結果を表４に示す。Example 2 N-types 1 to 6 and gypsum types 1 and 2 were immersed in a water tank containing colored water, and the wet height was measured 10 minutes after the immersion as the diffusion rate of water. The results are shown in Table 4.
【００５６】またそれぞれの型を用いて陶磁器の素地を
成形した。この成形に当たり、含水率３０％の陶磁器製
造用泥漿を用い、該泥漿を型に流し込んで、鋳込成形を
行った。このときの成形体の着肉厚さを測定した。１つ
の型で成形体を１０個作り、それぞれの着肉厚さを測定
し、それらの平均値を求めた。また成形体を脱型すると
きの離型性について試験した。これらの結果を表４に示
す。Further, a ceramic body was molded using each mold. At the time of this molding, a slurry for producing ceramics having a water content of 30% was used, and the slurry was cast into a mold for casting. At this time, the thickness of the formed body was measured. Ten molded bodies were made with one mold, the thickness of each wall was measured, and the average value was calculated. Further, the mold releasability at the time of releasing the molded body was tested. The results are shown in Table 4.
【００５７】更に、各型がどのような種類の成形に用い
るのが最適であるかについて総合判断を行った。その結
果を表４の「成形別用途」の欄に示す。Further, a comprehensive judgment was made as to what kind of molding each mold is best used for. The results are shown in the column of "Application by molding" in Table 4.
【００５８】[0058]
【表４】 [Table 4]
【００５９】表４に示す結果から、本発明成形用型は従
来の石膏型の場合と同様の成形条件、成形工程によっ
て、陶磁器の素地を製造できることが判った。即ち、従
来とは異なる特別な成形条件、成形工程を設けることな
く良好な陶磁器素地を製造できることが判った。From the results shown in Table 4, it has been found that the molding die of the present invention can produce a ceramic base under the same molding conditions and molding steps as those of the conventional gypsum mold. That is, it has been found that a good ceramic base can be manufactured without providing special molding conditions and molding steps different from the conventional ones.
【００６０】実施例３
陶磁器素地の成形体が大型の物や厚肉物の場合は、縦方
向における着肉厚さが均一であることが必要であり、そ
のため成形用型の吸水能がどの部位においても均質であ
ること、つまり成形用型の多孔質特性が均質であること
が要求される。そこで本発明の成形用型が均質な吸水能
を有しているかどうかをみるための試験を行った。Example 3 In the case of a large-sized or thick-walled ceramic green body, it is necessary that the thickness of the wall in the vertical direction be uniform. Also in the above, that is, the porosity of the molding die is required to be homogeneous. Therefore, a test was carried out to see if the molding die of the present invention had a uniform water absorption capacity.
【００６１】この試験に当り、Ｎ型６の組成からなる円
筒形の成形体を作った。即ち、表２に示すＮ型６におけ
る材料組成のスラリーを型に流し込んで、硬化させ、高
さ４０ｃｍ、直径８ｃｍの円筒形の成形体を作った。こ
の成形体における上部、中部、下部の３つの部位におい
て多孔質体としての各物性を測定した。その結果を表５
に示す。In this test, a cylindrical molded body having an N type 6 composition was prepared. That is, a slurry having the material composition of N type 6 shown in Table 2 was cast into a mold and cured to form a cylindrical molded body having a height of 40 cm and a diameter of 8 cm. The physical properties of the porous body were measured at three sites, the upper part, the middle part, and the lower part of the molded body. The results are shown in Table 5.
Shown in.
【００６２】[0062]
【表５】 [Table 5]
【００６３】表５によれば、Ｎ型６の円筒形体は上部、
中部、下部のどの部位においても均質な物性を有するこ
とを示している。このことから本発明成形用型は、型の
縦方向（上部、中部、下部）における吸水能がどの部位
でも均質であり、その結果、縦方向における着肉厚さが
均一な成形体を製造できるものであることが確認され
た。According to Table 5, the N-type 6 cylinder is at the top,
It shows that the central part and the lower part have uniform physical properties. From this, the molding die of the present invention has a uniform water absorption capacity in the longitudinal direction (upper portion, middle portion, and lower portion) of the die, and as a result, it is possible to produce a molded body having a uniform thickness in the longitudinal direction. It was confirmed to be a thing.
【００６４】実施例４
表２に示すＮ型４の材料組成により、図１の工程に従っ
て皿製造用の成形用型を製作した。この成形用型を用い
て１０インチの皿形状素地を２００個成形した。成形を
行う前（即ち、成形回数０回）の成形用型の重量と、上
記素地を２００個成形した後（即ち、成形回数２００
回）の成形用型の重量を測定し、成形前の重量に対する
２００個成形後の重量の割合を百分率（％）で示した
「成形後の重量率」を求めた。型の重量を測定するに当
たっては、型を４０℃で乾燥し、この乾燥重量を測定し
た。比較のため、表２に示す石膏型２の組成からなる皿
製造用の石膏型を製作し、上記と同様の試験を行って成
形後の重量率を求めた。Example 4 Using the material composition of N type 4 shown in Table 2, a molding die for producing a dish was manufactured according to the process shown in FIG. Using this molding die, 200 10-inch dish-shaped substrates were molded. The weight of the molding die before molding (that is, the number of molding times is 0) and after molding 200 of the above-mentioned base materials (that is, the number of molding times is 200).
The weight of the molding die was measured, and the “weight ratio after molding” was calculated by showing the ratio of the weight after 200 moldings to the weight before molding as a percentage (%). In measuring the weight of the mold, the mold was dried at 40 ° C. and the dry weight was measured. For comparison, a gypsum mold for making a dish having the composition of gypsum mold 2 shown in Table 2 was manufactured, and the same test as above was performed to determine the weight ratio after molding.
【００６５】その結果、Ｎ型４においては、成形前の型
重量は３９２６ｇで、２００個成形後の型重量は３９２
４ｇであった。従って、減量率は０．０５％であり、成
形前の重量に対する２００個成形後の重量％、即ち成形
後の重量率は９９．９５％であった。As a result, in the N type 4, the mold weight before molding was 3926 g, and the mold weight after molding 200 pieces was 392.
It was 4 g. Therefore, the weight loss rate was 0.05%, and the weight ratio after molding 200 pieces, that is, the weight ratio after molding was 99.95% with respect to the weight before molding.
【００６６】一方、石膏型２においては、成形前の型重
量は３２８７ｇで、２００個成形後の型重量は３２０２
ｇであった。従って、減量率は２．５９％であり、成形
後の重量率は９７．４１％であった。上記結果に基づ
き、成形回数と成形後の重量率との関係を図２のグラフ
に示す。図中、１はＮ型４を、２は石膏型２をそれぞれ
示す。On the other hand, in the gypsum mold 2, the mold weight before molding was 3287 g, and the mold weight after molding 200 pieces was 3202 g.
It was g. Therefore, the weight loss rate was 2.59%, and the weight rate after molding was 97.41%. Based on the above results, the relationship between the number of moldings and the weight ratio after molding is shown in the graph of FIG. In the figure, 1 indicates an N type 4 and 2 indicates a gypsum type 2.
【００６７】上記の試験は、同一の型を使用して多数の
素地を成形したときの摩耗度を測定したものであるが、
Ｎ型４は実用的に上限とされる２００個の素地成形後で
も摩耗度は極めて僅かであり、石膏型２に比べて５０倍
強の耐久性を有しているという結果が得られた。The above-mentioned test was carried out by measuring the degree of wear when a large number of substrates were molded using the same mold.
The N-type 4 had a very small degree of wear even after the molding of 200 bases, which is a practical upper limit, and it was found that the N-type 4 had a durability of slightly more than 50 times that of the gypsum type 2.
【００６８】[0068]
【発明の効果】本発明は珪酸質鉱物、セメント、石膏から
なる材料にて陶磁器成形用型を形成してなるものである
から、水不溶性の骨格構造を備え、そのため陶磁器素地成
形を多数回繰り返しても成形面の空間内容積が増加せ
ず、ほぼ空間内容積を一定に保持することができる。そ
の結果、従来より多数回の素地成形を行っても成形され
た素地の寸法等にほとんど誤差を生じなく、型としての
耐用寿命が伸び、耐久性が著しく向上する。また本発明
成形用型は耐磨耗性に優れているため、この面からも成
形面の空間内容積の変動が抑止され、水不溶性骨格構造
による作用と耐磨耗性による作用との２つの作用により
型の耐久性を従来よりも飛躍的に向上できる効果があ
る。EFFECTS OF THE INVENTION The present invention comprises a mold for ceramics made of a material composed of siliceous minerals, cement, and gypsum, and therefore has a water-insoluble skeleton structure, and therefore the ceramic base molding is repeated many times. However, the internal volume of the molding surface does not increase, and the internal volume of the space can be maintained substantially constant. As a result, even if the base material is formed a large number of times as compared with the prior art, there is almost no error in the dimensions of the formed base material, the useful life of the mold is extended, and the durability is remarkably improved. Further, since the molding die of the present invention has excellent wear resistance, fluctuations in the space volume of the molding surface are suppressed from this aspect as well, and there are two effects: the water-insoluble skeleton structure and the wear resistance. By the action, there is an effect that the durability of the mold can be dramatically improved as compared with the conventional one.
【００６９】更に本発明成形用型は機械的強度に優れ、
外力により容易に破損することがない。また従来よりも
耐熱性が向上し、そのため型の乾燥温度を上昇して乾燥
時間の短縮を図ることができ、成形サイクルの効率を向
上できる。Further, the molding die of the present invention has excellent mechanical strength,
It is not easily damaged by external force. Further, the heat resistance is improved as compared with the conventional one, so that the drying temperature of the mold can be increased to shorten the drying time and the efficiency of the molding cycle can be improved.
【００７０】本発明の製造方法によれば、優れた特質を
備えた陶磁器成形用型を従来と同様の成形工程により容
易に製造することができる。According to the manufacturing method of the present invention, it is possible to easily manufacture a ceramics molding die having excellent characteristics by a molding step similar to the conventional one.
【図１】本発明陶磁器成形の製造工程を示すブロック図
である。FIG. 1 is a block diagram showing a manufacturing process of a ceramics molding of the present invention.
【図２】成形回数と成形後の重量率との関係を示すグラ
フである。FIG. 2 is a graph showing the relationship between the number of moldings and the weight ratio after molding.
１ Ｎ型４ ２ 石膏型２ 1 N type 4 2 gypsum mold 2
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０４Ｂ 14:38） ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) C04B 14:38)
Claims (6)
料にて形成してなることを特徴とする陶磁器成形用型。1. A mold for forming ceramics, which is formed of a material composed of siliceous mineral, cement, and gypsum.
の珪酸質微粒子及び／又は繊維質鉱物を配合してなるこ
とを特徴とする請求項１記載の陶磁器成形用型。2. The mold for porcelain molding according to claim 1, wherein silicate fine particles having an average particle diameter of 0.1 μm or more and less than 2 μm and / or fibrous minerals are mixed.
１０〜４０重量部、石膏２〜２５重量部からなる材料に
て形成してなることを特徴とする陶磁器成形用型。3. A ceramic molding die, which is made of a material composed of 40 to 70 parts by weight of siliceous mineral, 10 to 40 parts by weight of cement, and 2 to 25 parts by weight of gypsum.
１０〜４０重量部、石膏２〜２５重量部、平均粒径が
０．１μｍ以上、２μｍ未満の珪酸質微粒子１〜１０重
量部、繊維質鉱物０．２〜５重量部からなる材料にて形
成してなることを特徴とする陶磁器成形用型。4. Silica mineral 40 to 70 parts by weight, cement 10 to 40 parts by weight, gypsum 2 to 25 parts by weight, silicic fine particles having an average particle size of 0.1 μm or more and less than 2 μm, 1 to 10 parts by weight, and fibers. A mold for porcelain molding, which is formed of a material composed of 0.2 to 5 parts by weight of fine minerals.
１０〜４０重量部、石膏２〜２５重量部に水３５〜６０
重量部を加えて混合し、得られたスラリーを型成形用母
型に鋳込み、硬化させ、脱型して成形体を得るようにし
たことを特徴とする陶磁器成形用型の製造方法。5. Silica-based mineral 40 to 70 parts by weight, cement 10 to 40 parts by weight, gypsum 2 to 25 parts by weight and water 35 to 60.
A method for manufacturing a ceramics molding die, characterized in that parts by weight are added and mixed, and the resulting slurry is cast into a molding die, cured, and released to obtain a molded body.
１０〜４０重量部、石膏２〜２５重量部、平均粒径が
０．１μｍ以上、２μｍ未満の珪酸質微粒子１〜１０重
量部、繊維質鉱物０．２〜５重量部に水３５〜６０重量
部を加えて混合し、得られたスラリーを型成形用母型に
鋳込み、硬化させ、脱型して成形体を得るようにしたこ
とを特徴とする陶磁器成形用型の製造方法。6. Silica mineral 40 to 70 parts by weight, cement 10 to 40 parts by weight, gypsum 2 to 25 parts by weight, silicic fine particles having an average particle size of 0.1 μm or more and less than 2 μm, 1 to 10 parts by weight, and fibers. 35 to 60 parts by weight of water was added to 0.2 to 5 parts by weight of the fine mineral and mixed, and the obtained slurry was cast into a molding die, cured, and demolded to obtain a molded body. A method for manufacturing a ceramics molding die characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001329029A JP3606828B2 (en) | 2001-10-26 | 2001-10-26 | Ceramic mold and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001329029A JP3606828B2 (en) | 2001-10-26 | 2001-10-26 | Ceramic mold and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003127120A true JP2003127120A (en) | 2003-05-08 |
| JP3606828B2 JP3606828B2 (en) | 2005-01-05 |
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| JP2001329029A Expired - Fee Related JP3606828B2 (en) | 2001-10-26 | 2001-10-26 | Ceramic mold and its manufacturing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2890021A1 (en) * | 2005-09-01 | 2007-03-02 | Livbag Soc Par Actions Simplif | Cement based casing for the gas generator of a automobile safety system incorporating an inflatable cushion or curtain for driver and passenger protection |
| KR20190044753A (en) * | 2017-10-23 | 2019-05-02 | 한국도자기주식회사 | Ceramic ware composition for binder jetting 3D printing and manufacturing method of ceramic ware using the composition |
-
2001
- 2001-10-26 JP JP2001329029A patent/JP3606828B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2890021A1 (en) * | 2005-09-01 | 2007-03-02 | Livbag Soc Par Actions Simplif | Cement based casing for the gas generator of a automobile safety system incorporating an inflatable cushion or curtain for driver and passenger protection |
| KR20190044753A (en) * | 2017-10-23 | 2019-05-02 | 한국도자기주식회사 | Ceramic ware composition for binder jetting 3D printing and manufacturing method of ceramic ware using the composition |
| KR102022258B1 (en) | 2017-10-23 | 2019-09-18 | 한국도자기주식회사 | Ceramic ware composition for binder jetting 3D printing and manufacturing method of ceramic ware using the composition |
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| JP3606828B2 (en) | 2005-01-05 |
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