JPH0628773B2 - Mold material - Google Patents
Mold materialInfo
- Publication number
- JPH0628773B2 JPH0628773B2 JP60086129A JP8612985A JPH0628773B2 JP H0628773 B2 JPH0628773 B2 JP H0628773B2 JP 60086129 A JP60086129 A JP 60086129A JP 8612985 A JP8612985 A JP 8612985A JP H0628773 B2 JPH0628773 B2 JP H0628773B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- casting
- weight
- mold material
- resin
- 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 - Fee Related
Links
- 239000000463 material Substances 0.000 title claims description 31
- 239000000919 ceramic Substances 0.000 claims description 19
- 229920005989 resin Polymers 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 7
- 239000003110 molding sand Substances 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 229920001187 thermosetting polymer Polymers 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000005266 casting Methods 0.000 description 22
- 239000008187 granular material Substances 0.000 description 20
- 239000011230 binding agent Substances 0.000 description 13
- 239000002245 particle Substances 0.000 description 11
- 239000004576 sand Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000005011 phenolic resin Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 229910000881 Cu alloy Inorganic materials 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229910001234 light alloy Inorganic materials 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000010680 novolac-type phenolic resin Substances 0.000 description 3
- 229920001568 phenolic resin Polymers 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 2
- 239000004312 hexamethylene tetramine Substances 0.000 description 2
- 229910001095 light aluminium alloy Inorganic materials 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 229920003986 novolac Polymers 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011134 resol-type phenolic resin Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000010112 shell-mould casting Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、崩壊性が改善された鋳型の製造に好適な鋳型
材料に関するものである。さらに詳しくいえば、本発明
は、特にアルミニウム軽合金や銅合金鋳物などの鋳造後
における鋳型の崩壊性を大幅に改善させうる鋳型材料に
関するものである。Description: TECHNICAL FIELD The present invention relates to a mold material suitable for manufacturing a mold having improved disintegration property. More specifically, the present invention relates to a mold material capable of greatly improving the disintegration property of a mold after casting, especially for a light aluminum alloy or a copper alloy casting.
従来の技術 従来、耐火性粒状体と有機粘結剤とを主成分とする鋳型
材料は、例えば該有機粘結剤として主にフェノール系樹
脂を用いるシェルモールド法、フェノール・イソシアネ
ート系樹脂を用いるコールドボックス法、フラン系樹脂
やフェノール系樹脂を用いる常温自硬性法などによって
鋳型に賦形され、アルミニウム軽合金、銅合金、鋳鉄、
鋳鋼鋳物などの製造に使用されている。2. Description of the Related Art Conventionally, a mold material mainly containing a refractory granular material and an organic binder is, for example, a shell mold method in which a phenol resin is mainly used as the organic binder, a cold in which a phenol / isocyanate resin is used. It is shaped into a mold by a box method, a room temperature self-hardening method using a furan-based resin or a phenol-based resin, and a light aluminum alloy, copper alloy, cast iron,
Used for manufacturing cast steel castings.
このような鋳型材料においては、有機粘結剤として、通
常前記したような耐熱性が高く、結合力の強い熱硬化性
樹脂が用いられている。したがって、該鋳型材料から得
られた鋳型では、例えば自動車用鋳物として多用される
軽量化を目的としたアルミニウム軽合金鋳物を鋳造する
場合、溶融温度が600〜700℃と低いために、注湯後の崩
壊性が極めて悪く、その砂落しのために、通常400〜500
℃の温度で４〜８時間熱処理されており、また鋳鉄鋳物
の鋳造においても、近年該鋳物を薄肉化して軽量化した
り、構造的に複雑化する傾向にあるため、鋳造後の崩壊
性が悪い場合が多く、このような場合には、例えばエア
ハンマーなどで鋳物に衝撃を与えたのち、鋳物中の残砂
を手作業で除去するなど、多大なエネルギーと労力を必
要とし、かつ生産効率が悪いという問題がある。In such a template material, as the organic binder, a thermosetting resin having a high heat resistance and a strong bonding force as described above is usually used. Therefore, in the mold obtained from the mold material, for example, when casting an aluminum light alloy casting for the purpose of weight reduction, which is often used as a casting for automobiles, since the melting temperature is as low as 600 to 700 ° C., after pouring Has a very poor disintegration property, and due to its sand removal, it is usually 400-500
It is heat-treated at a temperature of ℃ for 4 to 8 hours, and also in the casting of cast iron castings, in recent years, the castings tend to be thin and lightweight, and structurally complicated, so the disintegration after casting is poor. In many cases, in such a case, after impacting the casting with an air hammer, for example, the residual sand in the casting is manually removed, which requires a great deal of energy and labor, and the production efficiency is high. There is a problem of being bad.
発明が解決しようとする問題点 本発明の目的は、このような従来の鋳型材料が有する問
題を解決し、特にアルミニウム軽合金や銅合金鋳物など
の鋳造後における鋳型の崩壊性を大幅に改善させうる鋳
型材料を提供することにある。Problems to be Solved by the Invention The object of the present invention is to solve the problems of such conventional mold materials, and to greatly improve the collapsibility of the mold after casting such as aluminum light alloy or copper alloy casting. The present invention is to provide a mold material.
問題点を解決するための手段 本発明者らは鋭意研究を重ねた結果、鋳型材料における
耐火性粒状物として、アルミナ質原料微粉末粒子を造粒
し焼結させた多孔質セラメックス粒状体に、熱硬化性フ
ェノール系樹脂を被覆して用いることにより、前記目的
を達成しうることを見出し、この知見に基づいて本発明
を完成するに至った。Means for Solving the Problems As a result of intensive studies conducted by the present inventors, as a refractory granule in a mold material, a porous ceramex granule obtained by granulating and sintering alumina raw material fine powder particles It was found that the above object can be achieved by coating with a thermosetting phenolic resin, and the present invention has been completed based on this finding.
すなわち、本発明は、(イ)アルミナ質原料微粉末を造
粒、焼結して得られる多孔質セラミックス球状体又はそ
れと鋳物砂との混合物及び(ロ)その表面に被覆されてい
る熱硬化性フェノール系樹脂を含有して成り、(ロ)成分
が(イ)成分の全重量に基づき0.5〜10重量％の範囲内にあ
ることを特徴とする鋳型材料を提供するものである。That is, the present invention is (a) granulation of alumina raw material fine powder, a porous ceramic spherical body obtained by sintering, or a mixture thereof and foundry sand, and (b) thermosetting property coated on the surface thereof. A template material comprising a phenolic resin, wherein the component (b) is in the range of 0.5 to 10% by weight based on the total weight of the component (a).
本発明材料においては、耐火性粒状体として、微粉末粒
子を造粒し焼結させた多孔質セラミックス粒状体を単独
で用いてもよいし、該多孔質セラミックス粒状体と鋳物
砂との混合物を用いてもよいが、混合物を用いる場合、
該多孔質セラミックス粒状体は鋳物砂中に１０重量％以
上配合されることが望ましい。この配合量が１０重量％
未満では、これで作った鋳型の崩壊性は十分に改善され
ない。また、該多孔質セラミックス粒状体としては、ア
ルミナ質原料微粉末、すなわち酸化アルミニウムを主成
分とする微粉末粒子を造粒し焼結させて得られた、気孔
率１０〜４０％を有するものが好適である。In the material of the present invention, as the refractory granule, a porous ceramic granule obtained by granulating and sintering fine powder particles may be used alone, or a mixture of the porous ceramic granule and the foundry sand is used. May be used, but when using a mixture,
It is desirable that the porous ceramic particles be mixed in the molding sand in an amount of 10% by weight or more. This blending amount is 10% by weight
Below, the disintegration properties of the molds made with this are not sufficiently improved. Further, as the porous ceramics granules, those having a porosity of 10 to 40% obtained by granulating and sintering alumina-based raw material fine powder, that is, fine powder particles containing aluminum oxide as a main component. It is suitable.
この気孔率が１０％未満のものでは、崩壊性の改善効果
が十分に発揮されず、一方、４０％を超えると該多孔質
セラミックス粒状体の強度が弱くなり、かつ鋳型を形成
するに必要な有機粘結剤の量が多くなってコスト高とな
る。また、該多孔質セラミックス粒状体の粒度分布につ
いては特に制限はないが、２０メッシュ篩上のものが２
０重量％以下であり、かつ270メッシュ篩通過のものが
１０重量％以下であることが好ましい。If the porosity is less than 10%, the effect of improving the disintegration is not sufficiently exerted, while if it exceeds 40%, the strength of the porous ceramic particles becomes weak and it is necessary to form a mold. The amount of the organic binder increases and the cost increases. The particle size distribution of the porous ceramic particles is not particularly limited, but that on the 20-mesh sieve is 2
It is preferably 0% by weight or less and 10% by weight or less when passing through a 270 mesh screen.
このような多孔質セラミックス粒状体の代表的なものと
しては、例えばナイガイセラビーズ〔商品名、Al2O
3質、内外耐火工業（株）製〕などが挙げられ、これら
はそれぞれ単独で用いてもよいし、２種以上混合して用
いてもよい。A typical example of such a porous ceramic granular material is, for example, nigye cera beads [trade name, Al 2 O
3 quality, such as internal and external refractory Industries Co., Ltd.] and the like, may be used each of which alone may be used by mixing two or more.
なお、ここで示される気孔率は次に示す方法によって測
定した。すなわち、試料を105〜120℃の恒温器中で乾燥
し、恒温に達したときの質量をW1(g)とする。この乾燥
した試料を煮沸槽の水面下に入れ、３時間以上煮沸した
のち室温まで冷却する。この飽水試料を水中につけたま
ま針金で懸垂して秤量し、針金の質量を差引いて試料の
水中質量W2(g)とする。次にこの飽水試料を水中から取
り出して、湿布で手早く表面をぬぐい、水滴を除去した
のち、秤量して飽水質量W3(g)として、これらの値から
気孔率を次式によって算出する。The porosity shown here was measured by the following method. That is, the sample is dried in an incubator at 105 to 120 ° C., and the mass when the temperature reaches the constant temperature is W 1 (g). The dried sample is put under water in a boiling tank, boiled for 3 hours or more, and then cooled to room temperature. The saturated sample is suspended in a wire while being immersed in water, weighed, and the mass of the wire is subtracted to obtain the mass W 2 (g) of the sample in water. Next, remove this saturated water sample from water, quickly wipe the surface with a compress to remove water droplets, and then weigh it to obtain the saturated water mass W 3 (g), and calculate the porosity from these values using the following formula. .
本発明材料においては、有機粘結剤として、通常、シェ
ルモールド法の鋳型材料として用いられているノボラッ
ク型又はレゾール型フェノール系樹脂が用いられる。 In the material of the present invention, as the organic binder, a novolac type or resol type phenolic resin which is generally used as a mold material for the shell molding method is used.
この有機粘結剤の使用量は(イ)成分すなわち耐火性粒状
体の全重量に基づき、0.5〜１０重量％の範囲で選ばれ
る。この有機粘結剤は、耐火性粒状体すなわち、多孔質
セラミックス球状体及び所望に応じて用いられる鋳物砂
の表面に被覆した状態で存在する。The amount of the organic binder used is selected in the range of 0.5 to 10% by weight based on the total weight of the component (a), that is, the refractory granules. This organic binder is present in a state of being coated on the surface of the refractory granular material, that is, the porous ceramics spherical body and the molding sand used as desired.
本発明の鋳型材料の製造方法としては、例えば鋳物砂の
一部又は全部を前記多孔質球状物に置換されて成る常温
又は加熱された耐火性粒状体と前記有機粘結剤とを、適
当な混練機を用いて混合する方法、あるいは常温又は加
熱された鋳物砂若しくは多孔質セラミックス粒状体と有
機粘結剤とを、適当な混練機を用いてそれぞれ別個に混
合したものを所望の割合で配合する方法などが挙げられ
る。As a method for producing the mold material of the present invention, for example, a room temperature or heated refractory granules formed by substituting a part or all of the molding sand with the porous spheres and the organic binder are suitable. A method of mixing using a kneader, or a mixture of a molding sand or porous ceramic particles at room temperature or heated and an organic binder, which are separately mixed using an appropriate kneader at a desired ratio. The method of doing is mentioned.
本発明の鋳型材料のうち、有機粘結剤として、ノボラッ
ク型フェノール樹脂を用いた場合は、鋳型材料製造時
に、ヘキサメチレンテトラミンのような硬化剤を混合し
て用いられる。また、本発明の材料には、滑剤のような
鋳型材料に慣用されている添加成分を加えて用いること
ができる。When a novolac type phenol resin is used as the organic binder in the template material of the present invention, a curing agent such as hexamethylenetetramine is mixed and used at the time of manufacturing the template material. Further, the material of the present invention may be used by adding an additive component such as a lubricant, which is commonly used in a mold material.
ところで、鋳型は通常、造型時、搬送時、鋳造時などに
おける破壊防止のために、その形状や対象鋳物に応じて
一定の強度を保有するように鋳型材料によって製造さ
れ、管理される。この場合、鋳型強度は同一有機粘結剤
でも使用される耐火性粒状体の種類や粒度分布によって
異なるため、一般的には該有機粘結剤の添加量によって
調整される。By the way, a mold is usually manufactured and managed by a mold material so as to have a certain strength in accordance with its shape and a target casting in order to prevent breakage during molding, transportation, casting, and the like. In this case, since the mold strength varies depending on the type and particle size distribution of the refractory granules used even with the same organic binder, it is generally adjusted by the addition amount of the organic binder.
発明の効果 本発明の鋳型材料は、耐火性粒状体として、アルミナ質
原料微粉末粒子を造粒し焼結させた多孔質セラミックス
球状体と単独で使用するか、又はこれと鋳物砂との混合
物を使用し、この表面を熱硬化性フェノール系樹脂で被
覆したものであって、粒子間の摩擦を軽減しうる球状体
が存在するため、崩壊しやすい状態が形成され、この材
料から得られた鋳型は、特にアルミニウム軽合金や銅合
金鋳物などの比較的低い温度で行われる鋳造後における
崩壊性が大幅に改善され、その崩壊に要する時間が著し
く短縮できる。したがって、本発明の鋳型材料を用いる
ことにより、生産効率が上がり生産性が著しく向上し、
かつ低い圧力のノックアウトで該鋳型が崩壊されるた
め、鋳物の破壊が少なく、製品歩留まりが向上する。Effect of the Invention The mold material of the present invention is used as a refractory granular material alone with a porous ceramics spherical body obtained by granulating and sintering alumina-based raw material fine powder particles, or a mixture of this and a molding sand. It was obtained by using this material, which was coated with a thermosetting phenolic resin on its surface and has a spherical body capable of reducing friction between particles, so that a fragile state was formed. The mold has a greatly improved disintegration property after casting, which is carried out at a relatively low temperature, such as aluminum light alloy or copper alloy casting, and the time required for the disintegration can be significantly shortened. Therefore, by using the mold material of the present invention, the production efficiency is increased and the productivity is remarkably improved,
Moreover, since the mold is disintegrated by knocking out at a low pressure, breakage of the casting is small and the product yield is improved.
さらに、本発明の材料に用いられる多孔質セラミックス
球状体は低膨脹成分で構成されているので、鋳型の熱膨
脹を小さくし、また気孔を有しているため鋳型が軽量に
なり、その結果作業労力の軽減及び単位重量当りの鋳型
の製造個数が増加し、コストダウンをはかることができ
るなどの利点を有している。Further, since the porous ceramics spherical body used in the material of the present invention is composed of a low expansion component, the thermal expansion of the mold is reduced, and since the mold has the pores, the mold becomes light in weight, resulting in a labor cost. And the number of molds manufactured per unit weight is increased, and the cost can be reduced.
実施例 次に、実施例により本発明をさらに詳細に説明する。EXAMPLES Next, the present invention will be described in more detail with reference to Examples.
なお、鋳型曲げ強度はJIS K6910に準じて測定し、崩壊
性は次のようにして調べた。The mold bending strength was measured according to JIS K6910, and the disintegration property was examined as follows.
すなわち、鋳型材料を用いて、ドッグボーン型中子（巾
４０mm、長さ７５mm、厚さ２５mm）を作成し、別にこれ
より少し大きい空間を有する主型を成型して、その中に
中子をセットしたのち、720±５℃に溶解したアルミニ
ウム合金を注湯する。次いで冷却後、鋳物の１か所に0.
4kg/cm2の圧力のエア・ハンマーで衝撃を繰り返し与え
て鋳物の径１０mmの出口より中子が完全に出るまでの時
間（崩壊時間）を測定して崩壊性を調べた。That is, a dogbone type core (width 40 mm, length 75 mm, thickness 25 mm) is made using a mold material, and a main mold having a space slightly larger than this is molded separately, and the core is placed therein. After setting, pour molten aluminum alloy at 720 ± 5 ℃. Then, after cooling, the cast product was sapphire in one place.
Disintegration was examined by repeatedly giving impact with an air hammer having a pressure of 4 kg / cm 2 and measuring the time (disintegration time) until the core was completely ejected from the outlet having a diameter of 10 mm of the casting.
また、熱膨脹率は、炉内温度1100℃に調整された高温鋳
物砂試験機中に試験片（３０mmφ×５０mm）を設置し、
その曝熱時点から４分後における試験片の熱膨脹量を下
記の計算式で算出した。In addition, the thermal expansion coefficient, the test piece (30mmφ × 50mm) was installed in a high temperature casting sand tester adjusted to a furnace temperature of 1100 ° C.
The thermal expansion amount of the test piece 4 minutes after the heat exposure was calculated by the following calculation formula.
実施例１〜３ 耐火性粒状体として、第１表に示すような多孔質セラミ
ックス球状体5000重量部を用い、これをヒーターによっ
て140〜150℃に加熱したのち、スピードミキサー（遠州
鉄工社製）に投入し、次いでただちに、一定の鋳型強度
を得るために粘結剤として、第２表に示すような所定量
のノボラック型フェノール樹脂〔旭有機材工業（株）
製、SP690〕を投入し、ミキサー中で５０秒間混練し
て、該樹脂を耐火性粒状体に被覆した。次にこれに耐火
性粒状体に対し冷却水1.5重量％と該樹脂に対してヘキ
サメチレンテトラミン１５重量％とを水溶液にして投入
し、約４０〜６０秒後に内容物が乾体自由流動的になっ
たところで、滑剤としてステアリン酸カルシウムを該粒
状体に対して0.1重量％投入し、さらに約１５秒間混練
したのち、ミキサーから排出して流動性に富んだ加熱硬
化性の鋳型材料を得た。 Examples 1 to 3 5000 parts by weight of a porous ceramics spherical body as shown in Table 1 was used as the refractory granules, which was heated to 140 to 150 ° C. by a heater, and then a speed mixer (manufactured by Enshu Iron Works Co., Ltd.). Then, as a binder to obtain a constant mold strength, a predetermined amount of novolac type phenol resin [Asahi Organic Materials Industrial Co., Ltd.] as shown in Table 2 was immediately added.
Manufactured by SP690], and kneaded in a mixer for 50 seconds to coat the resin on the refractory granules. Next, 1.5% by weight of cooling water with respect to the refractory granules and 15% by weight of hexamethylenetetramine with respect to the resin were added to the solution as an aqueous solution, and after about 40 to 60 seconds, the content was dried and free flowing. After that, 0.1% by weight of calcium stearate as a lubricant was added to the granules, the mixture was kneaded for about 15 seconds, and then discharged from the mixer to obtain a heat-curable mold material having a high fluidity.
このようにして得られた鋳型材料の鋳型曲げ強度、崩壊
性及び熱膨張率を求めた。その結果を第２表に示す。The mold bending strength, the disintegration property and the coefficient of thermal expansion of the thus obtained mold material were determined. The results are shown in Table 2.
実施例４、５ 耐火性粒状体として、多孔質セラミックス球状体を単独
で用いる代りに、第１表に示すような鋳物砂と多孔質セ
ラミックス球状体との混合物を用いる以外は、実施例１
〜３と同様な方法で、加熱硬化性の鋳型材料を得、この
ものの鋳型曲げ強度、崩壊性及び熱膨張率を求めた。そ
の結果を第２表に示す。Examples 4 and 5 Example 1 except that as the refractory granules, instead of using the porous ceramic spheres alone, a mixture of foundry sand and porous ceramic spheres as shown in Table 1 was used.
In the same manner as described in (1) to (3) above, a thermosetting mold material was obtained, and the mold bending strength, disintegration property and coefficient of thermal expansion of this were determined. The results are shown in Table 2.
実施例６ 耐火性粒状体として、多孔質セラミックス球状体の代り
に鋳物砂を用いる以外は、実施例１〜３と同様な方法で
1.8重量％のノボラック型フェノール樹脂を使用した樹
脂被覆鋳物砂(A)を得、一方、前記と同様にして、1.8重
量％のノボラック型フェノール樹脂を使用した樹脂被覆
多孔質セラミックス球状体(B)を得た。この(A)と(B)と
を重量比５０：５０の割合で混合して鋳型材料を製造
し、このものの鋳型曲げ強度、崩壊性及び熱膨張率を求
めた。その結果を第２表に示す。Example 6 The same method as in Examples 1 to 3 except that as the refractory granules, foundry sand is used instead of the porous ceramic spherical bodies.
Obtaining resin-coated foundry sand (A) using 1.8% by weight of novolac-type phenolic resin, on the other hand, in the same manner as described above, resin-coated porous ceramics spherical body (B) using 1.8% by weight of novolac-type phenolic resin Got These (A) and (B) were mixed at a weight ratio of 50:50 to produce a mold material, and the mold bending strength, disintegration property and coefficient of thermal expansion of this were determined. The results are shown in Table 2.
比較例１、２ 耐火性粒状体として、多孔質セラミックス球状体の代り
に鋳型砂を用いる以外は、実施例１〜３と同様にして加
熱硬化性の鋳型材料を製造し、このものの鋳型曲げ強
度、崩壊性及び熱膨張率を求めた。その結果を第２表に
示す。Comparative Examples 1 and 2 A heat-curable mold material was produced in the same manner as in Examples 1 to 3 except that mold sand was used as the refractory granules instead of the porous ceramic spheres, and the mold bending strength of this product was used. The disintegration property and the coefficient of thermal expansion were determined. The results are shown in Table 2.
第２表から明らかなように、本発明の鋳型材料において
は、崩壊時間が従来のものに比べて大幅に短縮されてお
り、崩壊性が著しく向上していることが分る。 As is clear from Table 2, in the mold material of the present invention, the disintegration time is significantly shortened as compared with the conventional one, and it is understood that the disintegration property is remarkably improved.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 甲斐 勲 愛知県丹羽郡扶桑町大字南山名字新津26― ４ 旭有機材工業株式会社愛知工場内 (72)発明者 為本 和雄 愛知県丹羽郡扶桑町大字南山名字新津26― ４ 旭有機材工業株式会社愛知工場内 (56)参考文献 特開 昭52−37514（ＪＰ，Ａ) 特開 昭59−133933（ＪＰ，Ａ) 特開 昭52−17327（ＪＰ，Ａ) 特開 昭50−75117（ＪＰ，Ａ) 「ジャクトニュース」 社団法人 鋳造 技術普及協会 第245号Ｐ．26〜32， 及 び 第327号 Ｐ．38〜39 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Isao Kai Futsu-cho, Niwa-gun, Aichi 26--4 Niitsu, Minamiyama, Aichi Plant (Asahi Organic Materials Co., Ltd.) (72) Inventor Kazuo Tamemoto Fuso-cho, Niwa-gun, Aichi 26-4 Asahi Organic Materials Co., Ltd. Aichi Plant (56) References JP-A-52-37514 (JP, A) JP-A-59-133933 (JP, A) JP-A-52-17327 ( JP, A) JP 50-75117 (JP, A) "JACT NEWS" Japan Casting Technology Promotion Association No. 245 P. 26-32, and No. 327, p. 38 ~ 39
Claims (1)
て得られる多孔質セラミックス球状体又はそれと鋳物砂
との混合物及び(ロ)その表面に被覆されている熱硬化性
フェノール系樹脂を含有して成り、(ロ)成分が(イ)成分の
全重量に基づき0.5〜10重量％の範囲内にあることを特
徴とする鋳型材料。1. A porous spherical ceramics obtained by granulating and sintering aluminous raw material fine powder or a mixture thereof with molding sand, and (b) a thermosetting phenol coated on the surface thereof. A mold material containing a resin, wherein the component (b) is in the range of 0.5 to 10% by weight based on the total weight of the component (a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60086129A JPH0628773B2 (en) | 1985-04-22 | 1985-04-22 | Mold material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60086129A JPH0628773B2 (en) | 1985-04-22 | 1985-04-22 | Mold material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61245937A JPS61245937A (en) | 1986-11-01 |
| JPH0628773B2 true JPH0628773B2 (en) | 1994-04-20 |
Family
ID=13878096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60086129A Expired - Fee Related JPH0628773B2 (en) | 1985-04-22 | 1985-04-22 | Mold material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0628773B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006305628A (en) | 2005-03-30 | 2006-11-09 | Asahi Organic Chem Ind Co Ltd | Mold material for shell mold |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8307881B2 (en) * | 2009-01-06 | 2012-11-13 | General Electric Company | Casting molds for use in directional solidification processes and methods of making |
| JP2011092991A (en) * | 2009-11-02 | 2011-05-12 | Sanei Shirika:Kk | Casting sand and method for producing the same, and mold using the casting sand |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52810B2 (en) * | 1973-11-07 | 1977-01-11 | ||
| DE2638042A1 (en) * | 1975-09-17 | 1977-03-24 | Fischer Ag Georg | PROCESS FOR TREATMENT OF POROESE, GRAY BASE MATERIALS, IN PARTICULAR FOR THE PRODUCTION OF FOUNDRY SANDS |
| JPS5256007U (en) * | 1975-10-21 | 1977-04-22 | ||
| JPS5217327A (en) * | 1976-04-16 | 1977-02-09 | Hitachi Ltd | Casting sand of good disintegrating property |
| JPS53146757U (en) * | 1977-04-25 | 1978-11-18 | ||
| JPS6057424B2 (en) * | 1983-01-24 | 1985-12-14 | 株式会社小松製作所 | Manufacturing method of microwave heat-curable foundry sand |
-
1985
- 1985-04-22 JP JP60086129A patent/JPH0628773B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 「ジャクトニュース」社団法人鋳造技術普及協会第２４５号Ｐ．２６〜３２，及び第３２７号Ｐ．３８〜３９ |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006305628A (en) | 2005-03-30 | 2006-11-09 | Asahi Organic Chem Ind Co Ltd | Mold material for shell mold |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61245937A (en) | 1986-11-01 |
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