JP2003275844A - Mold composition and method of producing mold - Google Patents
Mold composition and method of producing moldInfo
- Publication number
- JP2003275844A JP2003275844A JP2002119920A JP2002119920A JP2003275844A JP 2003275844 A JP2003275844 A JP 2003275844A JP 2002119920 A JP2002119920 A JP 2002119920A JP 2002119920 A JP2002119920 A JP 2002119920A JP 2003275844 A JP2003275844 A JP 2003275844A
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- Prior art keywords
- carbonate
- self
- weight
- curing agent
- mold
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、炭酸ガス法の粘結剤で
ある水溶性アルカリレゾール型フェノール樹脂や水ガラ
スに炭酸塩を添加することにより、炭酸ガスを使用せず
に粘結剤を硬化させ、自硬性鋳型を製造することに関す
るものである。BACKGROUND OF THE INVENTION The present invention provides a binder without adding carbon dioxide by adding a carbonate to a water-soluble alkaline resole type phenolic resin or water glass which is a binder for the carbon dioxide method. It relates to curing and producing a self-hardening mold.
【０００２】[0002]
【従来の技術】鋳物製造に供する鋳型としては、大量生
産の主型用にベントナイト系の生型、中子用には熱硬化
系のシェルモールが主に採用されている。2. Description of the Related Art As a mold to be used for casting production, a bentonite type green mold is mainly used for a mass production main mold, and a thermosetting shell mold is mainly used for a core.
【０００３】一方、多品種少量生産分野では使用砂を回
収して再利用できる有機系のフラン自硬性や水溶性アル
カリフェノール自硬性鋳型が主に適用されてきている。On the other hand, in the field of high-mix low-volume production, organic furan self-hardening molds and water-soluble alkali phenol self-hardening molds, which can collect and reuse used sand, have been mainly applied.
【０００４】また環境対策から、多品種少量生産分野で
は今でも水ガラスを鋳型製造用粘結剤として炭酸ガスを
通気したガス硬化法や硬化剤として有機エステルを用い
た自硬性法が採用されている。Further, in view of environmental measures, in the field of high-mix low-volume production, the gas hardening method in which water glass is used as a binder for the production of carbon dioxide gas and the self-hardening method using an organic ester as a hardening agent are still adopted. There is.
【０００５】しかし、水ガラスを粘結剤としたプロセス
は有機粘結剤より作業環境は良好であるが、砂の崩壊性
と回収率が悪いため、その対策に苦慮している。However, although the process using water glass as a binder has a better working environment than the organic binder, it is difficult to take measures against it because the sand disintegration property and the recovery rate are poor.
【０００６】フラン自硬性法は鋳込み後の砂の崩壊性が
優れている上に、砂の再生が容易であり、低コストのた
め広く採用されて来ているが、硬化剤に含有されるＳ成
分に起因する鋳込み時のＳＯ２ガスの発生や、鋳鋼の熱
間割れ、ダクタイル鋳鉄の黒鉛球状化不良が発生しやす
い弱点があり改善が必要とされてきている。The furan self-hardening method is widely used because of its excellent disintegration property of sand after casting, easy sand regeneration and low cost. There is a weak point that SO 2 gas is generated at the time of casting due to the components, hot cracking of cast steel, and graphite spheroidizing failure of ductile cast iron are likely to occur.
【０００７】これらの課題を改善するために、Ｓを含ま
ない水溶性アルカリフェノール自硬性法が英国で開発さ
れ日本でも鋳鋼の分野で広まりつつあるが、硬化剤の有
機エステルの価格が高価なため、フラン法よりもコスト
高であり、また鋳込み後の砂の崩壊性もフラン法より劣
るためその改善が必要となっている。In order to solve these problems, a water-soluble alkali phenol self-hardening method containing no S was developed in the UK and is spreading in the field of cast steel in Japan, but the price of the organic ester as a curing agent is high. The cost is higher than that of the Fran method, and the collapsibility of sand after casting is inferior to that of the Fran method.
【０００８】また水溶性アルカリフェノール樹脂を用い
てギ酸メチルの蒸気や炭酸ガスを通気して生産性を向上
させる方法も開発されてきているが、コスト高と消防法
対策が必要である。Further, a method for improving productivity by aeration of vapor of methyl formate or carbon dioxide gas using a water-soluble alkali phenol resin has been developed, but it requires high cost and measures for the Fire Defense Law.
【０００９】[0009]
【発明が解決しようとする課題】本発明は、硬化剤とし
て有機エステルを用いる水溶性アルカリフェノール自硬
性法や水ガラス法自硬性の課題である硬化剤のコスト高
を改善し、作業環境や鋳込み後の砂の崩壊性を向上させ
るものである。DISCLOSURE OF THE INVENTION The present invention improves the cost of a curing agent which is a problem of water-soluble alkali phenol self-hardening method and water glass method self-hardening method using an organic ester as a hardening agent, and improves working environment and casting. It improves the disintegration property of the later sand.
【００１０】[0010]
【発明が解決使用とする手段】本発明に関しては、水溶
性アルカリフェノール自硬性法や水ガラス有機エステル
自硬性法の上記課題を解決すべく、鋭意研究を重ねた結
果、炭酸ガス硬化法で用いられる水溶性アルカリレゾー
ル型フェノール樹脂や水ガラスに対して炭酸ガスを通気
せずに、炭酸ガスを発生する炭酸塩を添加することによ
り、課題を改善出来る水溶性アルカリフェノール自硬性
法や水ガラス自硬性法を実現することが出来る。With respect to the present invention, as a result of intensive studies to solve the above problems of the water-soluble alkali phenol self-hardening method and the water glass organic ester self-hardening method, it was used in the carbon dioxide gas curing method. The water-soluble alkali phenol self-curing method or water glass self-curing method that can improve the problems can be solved by adding carbonate that generates carbon dioxide gas to the water-soluble alkali resol type phenolic resin or water glass that is not aerated with carbon dioxide gas. Hardness method can be realized.
【００１１】硬化剤として添加する炭酸塩は、各粘結剤
の１０〜５０％が望ましい。The carbonate added as a curing agent is preferably 10 to 50% of each binder.
【００１２】炭酸塩を直接水溶性アルカリレゾール型フ
ェノール樹脂に添加するか或いは骨材に添加することに
より、鋳型の崩壊性が大きく改善されることは、すでに
特開平７−１４８５４６に開示されている。しかし、こ
れは鋳型の崩壊性改善が目的であり、鋳型の硬化には有
機エステルか二酸化炭素ガスが必要であることがうたわ
れている。It has already been disclosed in JP-A-7-148546 that the disintegration property of the mold is greatly improved by adding the carbonate directly to the water-soluble alkali resol type phenol resin or to the aggregate. . However, this is intended to improve the disintegration property of the mold, and it is claimed that an organic ester or carbon dioxide gas is required for hardening the mold.
【００１３】炭酸塩に酸を添加すると、中和反応により
炭酸ガスが発生する。従って砂練時に水溶性アルカリレ
ゾール型フェノール樹脂や水ガラスと共に微量の酸を添
加することにより、炭酸塩の分解による炭酸ガス発生速
度が速まり硬化が促進される。When an acid is added to carbonate, carbon dioxide is generated by the neutralization reaction. Therefore, when a small amount of acid is added together with the water-soluble alkali resol-type phenol resin and water glass during sanding, the carbon dioxide gas generation rate due to the decomposition of carbonate is accelerated and the curing is accelerated.
【００１４】従って、炭酸塩粉末に例えば乾燥したクエ
ン酸粉末を添加しても反応しないが、水分を与えると反
応して盛んに炭酸ガスを発生する。それ故、炭酸塩粉末
をそのまま硬化剤として使用する場合は、炭酸塩粉末に
は、遊離水分を持たない有機酸や無機酸の結晶粉末を予
め混合して使用することが可能であり、酸結晶粉末の含
有割合によって自由に炭酸ガス発生速度を設定できる一
方反応速度の遅い他の金属炭酸塩も酸と水分の存在で容
易に炭酸ガスを発生する故、硬化剤として使用しやすく
なる。Therefore, even if, for example, dried citric acid powder is added to the carbonate powder, it does not react, but when water is given, it reacts and actively generates carbon dioxide gas. Therefore, when the carbonate powder is used as a curing agent as it is, it is possible to premix the carbonate powder with a crystal powder of an organic acid or an inorganic acid having no free water. The carbon dioxide generation rate can be freely set depending on the content ratio of the powder, while other metal carbonates having a slow reaction rate easily generate carbon dioxide gas in the presence of acid and water, and thus can be easily used as a curing agent.
【００１５】水溶性の粘結剤には水分が約４０％以上含
まれている故、酸結晶粉末を含有した炭酸塩が水溶性の
粘結剤と混合されると一層炭酸ガスを発生し始めて、鋳
型の硬化を速めることが出来る。Since the water-soluble binder contains about 40% or more of water, when the carbonate containing the acid crystal powder is mixed with the water-soluble binder, carbon dioxide gas is further generated. , The curing of the mold can be accelerated.
【００１６】多くの炭酸塩は固体粉末で使用された場
合、骨材へ均一に添加することは容易ではない。従って
水溶液等の液状で使用されることが望ましい。Many carbonates, when used as solid powders, are not easy to uniformly add to the aggregate. Therefore, it is desirable to use it in a liquid form such as an aqueous solution.
【００１７】しかし、炭酸塩は水やアルコールに溶解し
ずらく、沈殿してしまうため、常時混合液を撹拌するか
又は分散液の粘度を上げて炭酸塩が沈降しずらいように
する必要がある。例えば、分散液の粘度を１０ｃｐから
１００ｃｐに上げると炭酸塩の沈降時間は約４倍長くな
る。However, since carbonate is difficult to dissolve in water or alcohol and precipitates, it is necessary to constantly stir the mixed solution or increase the viscosity of the dispersion liquid to prevent carbonate precipitation. is there. For example, increasing the viscosity of the dispersion from 10 cp to 100 cp increases the carbonate settling time by a factor of about four.
【００１８】炭酸塩の分散液は炭酸塩を分解してしまう
酸のような物質が存在せず、中性のものがのぞましい。
それ故、水やアルコールが最適と考えられるが、沈降し
てしまうため、水の粘性を上げられれば最適な炭酸塩の
分散媒が得られる。The carbonate dispersion does not have a substance such as an acid that decomposes the carbonate, and is preferably neutral.
Therefore, water and alcohol are considered to be optimal, but since they settle, if the viscosity of water can be increased, an optimal carbonate dispersion medium can be obtained.
【００１９】澱粉を熱湯に入れると熱湯が急激にその粘
性を増すことは知られているが、澱粉を２％添加すると
粘性は約１００ｃｐまで上昇する。この澱粉液は中性で
あり極微量のため粘結剤の硬化や品質に殆ど影響しな
い。It is known that when starch is added to hot water, the viscosity of hot water rapidly increases, but when 2% of starch is added, the viscosity increases to about 100 cp. Since this starch liquid is neutral and has an extremely small amount, it hardly affects the hardening and quality of the binder.
【００２０】炭酸塩の粒子は細かいものほど沈殿しにく
くなるが、粒度としては１０〜１００ミクロンが望まし
いし、骨材へ均一に添加しやすい。The finer the particles of carbonate, the more difficult it is to settle, but the particle size is preferably 10 to 100 μm, and it is easy to uniformly add to the aggregate.
【００２１】[0021]
【実施例１】耐火性材料であるフォルステライト系人工
球状砂１００重量部に対して、炭酸水素カリウム７０％
を含む混合液をよく撹拌してその０．４重量部を予め添
加混練した後炭酸ガス硬化用水溶性アルカリレゾール型
フェノール樹脂１．５重量部を添加混練して混練砂を得
た。この混練砂を５０φ×５０ｈの木型に充填して自硬
性鋳型造型法により円柱状のテストピースを作成した。
尚比較例として同じ耐火性材料に市販の有機エステル硬
化剤０．３重量部を予め添加混練した後、市販の自硬性
用アルカリレゾール型フェノール樹脂１．５重量部を添
加混練して混練砂を得て同様のテストピースを作成し
た。[Example 1] 70% by weight of potassium hydrogen carbonate to 100 parts by weight of forsterite artificial spherical sand which is a refractory material
Was mixed well and 0.4 part by weight of the mixture was added and kneaded in advance, and then 1.5 parts by weight of a water-soluble alkaline resole type phenolic resin for curing carbon dioxide was added and kneaded to obtain kneaded sand. This kneading sand was filled in a wooden mold of 50φ × 50 h, and a cylindrical test piece was prepared by a self-hardening molding method.
As a comparative example, 0.3 parts by weight of a commercially available organic ester curing agent was previously added to the same refractory material and kneaded, and then 1.5 parts by weight of a commercially available alkali resol type phenol resin for self-hardening was added and kneaded to obtain a kneading sand. After that, a similar test piece was prepared.
【００２２】このよにして得たテストピースを２４時間
後に取り出して、圧縮強度試験器を用いて強度を測定し
た。その結果を表１に示す。The test piece thus obtained was taken out after 24 hours and the strength was measured using a compressive strength tester. The results are shown in Table 1.
【００２３】また同じテストピースをアルミホイールで
包んで７００℃の電気炉内で放置して冷却した後、５メ
ッシュの篩上で５分間振とうして、篩下の重量％を測定
し崩壊率とした。混練砂の硬化剤費の比較も併せてその
結果を表１に示す。The same test piece was wrapped in an aluminum wheel, left to stand in an electric furnace at 700 ° C., cooled, and shaken on a 5 mesh sieve for 5 minutes to measure the weight% under the sieve to measure the disintegration rate. And The results are shown in Table 1 together with the comparison of the curing agent cost of the kneading sand.
【００２４】[0024]
【表１】 [Table 1]
【００２５】[0025]
【実施例２】耐火性材料であるフォルステライト系人工
球状砂１００重量部に対して、炭酸水素カリム７０％を
含む混合液をよく撹拌してその１．０重量部を予め添加
混練した後モル比３．０の水ガラス３．０重量部を添加
混練して混練砂を得た。この混練砂を用いて実施例１と
同じ方法でテストピースを作成し強度と崩壊率を比較測
定した。その結果を表２に示す。[Example 2] 100 parts by weight of forsterite artificial spherical sand, which is a refractory material, was thoroughly mixed with 1.0% by weight of a mixed solution containing 70% of hydrogen carbonate kalim, and the mixture was kneaded. 3.0 parts by weight of water glass having a ratio of 3.0 was added and kneaded to obtain kneaded sand. Using this kneaded sand, a test piece was prepared in the same manner as in Example 1 and the strength and the collapse rate were compared and measured. The results are shown in Table 2.
【００２６】[0026]
【表２】 [Table 2]
【００２７】[0027]
【実施例３】耐火性材料であるフォルステライト系人工
球状砂１００重量部に対して、炭酸水素カリム７０％を
含む混合液をよく撹拌してその０．７重量部を予め添加
混練した後炭酸ガス硬化用水溶性アルカリレゾール型フ
ェノール樹脂０．８重量部とモル比３．０の水ガラス
１．２重量部を添加混練して混練砂を得た。この混練砂
を用いて実施例１と同じ方法でテストピースを作成し強
度と崩壊率を測定した。その結果を表３に示す。Example 3 A mixed solution containing 70% of hydrogen carbonate kalim was thoroughly stirred with 100 parts by weight of forsterite artificial spherical sand which is a refractory material, 0.7 parts by weight of which was added and kneaded in advance, and then carbonized. 0.8 parts by weight of a water-soluble alkaline resol-type phenol resin for gas curing and 1.2 parts by weight of water glass having a molar ratio of 3.0 were added and kneaded to obtain kneaded sand. Using this kneading sand, a test piece was prepared in the same manner as in Example 1 and the strength and the collapse rate were measured. The results are shown in Table 3.
【００２８】[0028]
【表３】 [Table 3]
【００２９】[0029]
【実施例４】耐火性材料であるフォルステライト系人工
球状砂１００重量部に対して、クエン酸２０％を混合し
た炭酸水素カリウム粉末０．４重量部を予め添加混練し
た後、炭酸ガス硬化用水溶性アルカリレゾール型フェノ
ール１．５部を添加混練して混練砂を得た。この混練砂
を用いて実施例１と同じ方法でテストピースを作成し立
ち上がり強度を比較測定した。その結果を表４に示す。Example 4 0.4 parts by weight of potassium hydrogen carbonate powder mixed with 20% of citric acid was added and kneaded to 100 parts by weight of forsterite artificial spherical sand which is a refractory material, and then kneaded with water for carbon dioxide gas hardening. 1.5 parts of soluble alkaline resole type phenol was added and kneaded to obtain kneaded sand. Using this kneaded sand, a test piece was prepared in the same manner as in Example 1 and the rising strength was comparatively measured. The results are shown in Table 4.
【００３０】[0030]
【表４】 [Table 4]
【００３１】[0031]
【実施例５】硬化剤の沈殿を防止するために、熱湯２０
０ｇに澱粉５ｇを溶いて十分に撹拌して冷却してその粘
性を測定した。その粘性液５０ｇに炭酸水素カリウム５
０ｇをよく混合して沈降高さとその沈殿時間を測定し
た。比較例として水５０ｇに炭酸水素カリウム５０ｇを
よく混合してその沈殿時間を同様に測定した。その結果
を表５に示す。[Example 5] Hot water 20 was added to prevent precipitation of the curing agent.
5 g of starch was dissolved in 0 g, sufficiently stirred and cooled, and its viscosity was measured. 50 g of the viscous liquid, potassium bicarbonate 5
0 g was mixed well and the sedimentation height and its sedimentation time were measured. As a comparative example, 50 g of potassium hydrogen carbonate was well mixed with 50 g of water, and the precipitation time was measured in the same manner. The results are shown in Table 5.
【００３２】[0032]
【表５】 [Table 5]
【００３３】[0033]
【発明の効果】以上説明したとおり、本発明の鋳型製造
方法にて鋳型を製造することにより、次のような効果が
ある。
（１）炭酸塩を硬化剤として用いることにより、硬化剤
費用を約６０％低減出来る。
（２）炭酸塩を硬化剤として用いることにより、使用後
の砂の崩壊性を大きく改善出来る。
（３）炭酸塩を硬化剤として用いることにより、硬化剤
の非危険物化が出来る。
（４）炭酸塩粉末に酸粉末を添加し硬化剤として使用す
ることにより、鋳型の硬化速度を上げることが出来る。
（５）混練砂に酸を添加することにより、炭酸塩の分解
を速めて自硬性砂の硬化を促進することが出来る。
（６）硬化剤の分散液の粘度を上げることにより、沈殿
時間を大きく延ばすことが出来る。As described above, the following effects can be obtained by manufacturing a mold according to the mold manufacturing method of the present invention. (1) By using carbonate as a curing agent, the curing agent cost can be reduced by about 60%. (2) By using carbonate as a curing agent, the disintegration property of sand after use can be greatly improved. (3) By using carbonate as a curing agent, the curing agent can be made non-hazardous. (4) By adding an acid powder to the carbonate powder and using it as a curing agent, the curing rate of the mold can be increased. (5) By adding an acid to the kneaded sand, it is possible to accelerate the decomposition of carbonate and accelerate the hardening of the self-hardening sand. (6) The precipitation time can be greatly extended by increasing the viscosity of the dispersion liquid of the curing agent.
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Claims (10)
徴とするアルカリレゾール型フェノールホルムアルデヒ
ド樹脂からなる粘結剤組成物を用いて常温自硬性鋳型を
得るために、耐火性材料１００重量部に対して、（Ａ）
アルカリレゾール型フェノールホルムアルデヒド樹脂か
らなる粘結剤組成物０．０１〜１０重量部、（Ｂ）硬化
剤として、炭酸カリウム、炭酸ナトリウム、炭酸リチウ
ム、炭酸カルシウム、炭酸マグネシウム、炭酸バリウ
ム、、炭酸亜鉛、炭酸銅、炭酸アルミニウム、炭酸水素
カリウム及び炭酸水素リチウム等の炭酸塩０．０１〜１
０重量部を必須成分として配合してなることを特徴とす
る自硬性鋳型組成物。1. To obtain a room temperature self-hardening mold using a binder composition comprising an alkali resol-type phenol formaldehyde resin characterized by being cured by reaction with carbon dioxide gas, 100 parts by weight of a refractory material is added. On the other hand, (A)
0.01 to 10 parts by weight of a binder composition comprising an alkali resol-type phenol formaldehyde resin, (B) a curing agent, potassium carbonate, sodium carbonate, lithium carbonate, calcium carbonate, magnesium carbonate, barium carbonate, zinc carbonate, Carbonates such as copper carbonate, aluminum carbonate, potassium hydrogen carbonate and lithium hydrogen carbonate 0.01 to 1
A self-hardening mold composition comprising 0 part by weight as an essential component.
徴とする珪酸アルカリ塩からなる粘結剤組成物を用いて
常温自硬性鋳型を得るために、耐火性材料１００重量部
に対して、（Ａ）珪酸アルカリ塩からなる粘結剤組成物
０．１〜１０重量部、（Ｂ）硬化剤として請求項１に記
載された炭酸塩０．０１〜１０重量部を必須成分として
配合してなることを特徴とする自硬性鋳型組成物。2. In order to obtain a room-temperature self-hardening mold using a binder composition comprising an alkali silicate, which is cured by a reaction with carbon dioxide gas, 100 parts by weight of a refractory material is used. 0.1 to 10 parts by weight of a binder composition comprising (A) an alkali silicate salt and 0.01 to 10 parts by weight of the carbonate salt described in claim 1 as a curing agent (B) are added as essential components. A self-hardening mold composition comprising:
とを特徴とするアルカリレゾール型フェノールホルムア
ルデヒド樹脂からなる粘結剤組成物と珪酸アルカリ塩か
らなる粘結剤組成物の混合物を用いて常温自硬性鋳型を
得るために、耐火性材料１００重量部に対して、（Ａ）
アルカリレゾール型フェノールホルムアルデヒド樹脂と
珪酸アルカリ塩とが混合された粘結剤組成物０．１〜１
０重量部、（Ｂ）硬化剤として請求項１に記載された炭
酸塩０．０１〜１０重量部を必須成分として配合してな
ることを特徴とする自硬性鋳型組成物。3. A mixture of a binder composition comprising an alkali resol-type phenol-formaldehyde resin and a binder composition comprising an alkali silicate salt characterized by being cured by reaction with carbon dioxide gas at room temperature. To obtain a self-hardening mold, (A) is added to 100 parts by weight of the refractory material.
Binder composition in which alkali resol type phenol formaldehyde resin and silicic acid alkali salt are mixed 0.1 to 1
A self-hardening mold composition comprising 0 part by weight and 0.01 to 10 parts by weight of the carbonate described in claim 1 as a curing agent (B) as an essential component.
徴とする粘結剤組成物用いて常温自硬性鋳型を得るため
に、耐火性材料１００重量部に対して、有機酸或いは無
機酸又はその混合物が０．０００１〜１０重量部配合し
てなることを特徴とする請求項１及至３のいずれか一項
にに記載された自硬性鋳型組成物。4. In order to obtain a room-temperature self-hardening mold using a binder composition characterized by being cured by reaction with carbon dioxide gas, an organic acid or an inorganic acid or 100 parts by weight of a refractory material is used. The self-hardening mold composition according to any one of claims 1 to 3, wherein the mixture is blended in an amount of 0.0001 to 10 parts by weight.
オリビンサンド、クロマイトサンド、ムライト系人工砂
及びフォルステライト系人工砂からなる請求項１及至４
のいずれか一項に記載された自硬性鋳型組成物。5. The refractory material is silica sand, zircon sand,
An olivine sand, a chromite sand, a mullite artificial sand, and a forsterite artificial sand.
The self-hardening mold composition described in any one of 1.
００ミクロン粒子の粉体又はそれらが半練り状或るいは
液体中に分散された状態で耐火物に添加されることから
なる請求項１及至５のいずれか一項に記載された自硬性
鋳型組成物。6. Carbonate used as a curing agent is 10 to 3
A self-hardening mold composition according to any one of claims 1 to 5, which is added to the refractory material in the form of powder of 00 micron particles or a state in which they are dispersed in a semi-kneaded state or a liquid. object.
分を持たない乾燥した有機酸、無機酸結晶の粉体との混
合物であることを特徴とする請求項１及至６のいずれか
一項に記載された自硬性鋳型組成物。7. The carbonate powder used as a curing agent is a mixture with a powder of a dry organic acid or inorganic acid crystal having no free water, and any one of claims 1 to 6. The self-hardening mold composition described in the item 1.
させる分散液が水、アルコール又はその混合物であるこ
とを特徴とする請求項１及至６のいずれか一項に記載さ
れた自硬性鋳型組成物。8. The self-hardening mold according to any one of claims 1 to 6, wherein the dispersion liquid in which the carbonate powder used as the curing agent is dispersed is water, alcohol or a mixture thereof. Composition.
させる分散液が、澱粉や穀粉で粘性を持たせた水溶液で
あることを特徴とする請求項１及至６のいずれか一項に
記載された自硬性鋳型組成物。9. The dispersion according to claim 1, wherein the carbonate powder used as a curing agent is dispersed in an aqueous solution having a viscosity of starch or flour. Self-hardening mold composition.
された鋳型製造用の粘結剤と骨材及び硬化剤を用いるこ
とを特徴とする鋳型製造方法。10. A method for producing a mold, which comprises using the binder for producing a mold according to any one of claims 1 to 10, an aggregate and a curing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002119920A JP2003275844A (en) | 2002-03-19 | 2002-03-19 | Mold composition and method of producing mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002119920A JP2003275844A (en) | 2002-03-19 | 2002-03-19 | Mold composition and method of producing mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003275844A true JP2003275844A (en) | 2003-09-30 |
Family
ID=29207965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002119920A Pending JP2003275844A (en) | 2002-03-19 | 2002-03-19 | Mold composition and method of producing mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003275844A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009166083A (en) * | 2008-01-16 | 2009-07-30 | Kubota Corp | Sand mold for centrifugal casting mold, and method for manufacturing rolling roll |
| CN104057020A (en) * | 2014-05-28 | 2014-09-24 | 安徽鑫润新型材料有限公司 | Casting molding sand for high-precision casting and preparation method of casting molding sand |
-
2002
- 2002-03-19 JP JP2002119920A patent/JP2003275844A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009166083A (en) * | 2008-01-16 | 2009-07-30 | Kubota Corp | Sand mold for centrifugal casting mold, and method for manufacturing rolling roll |
| CN104057020A (en) * | 2014-05-28 | 2014-09-24 | 安徽鑫润新型材料有限公司 | Casting molding sand for high-precision casting and preparation method of casting molding sand |
| CN104057020B (en) * | 2014-05-28 | 2016-07-06 | 安徽鑫润新型材料有限公司 | A kind of high accuracy foundry goods casting sand and preparation method thereof |
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