JPH04371348A - Mold coating material for casting - Google Patents
Mold coating material for castingInfo
- Publication number
- JPH04371348A JPH04371348A JP14576291A JP14576291A JPH04371348A JP H04371348 A JPH04371348 A JP H04371348A JP 14576291 A JP14576291 A JP 14576291A JP 14576291 A JP14576291 A JP 14576291A JP H04371348 A JPH04371348 A JP H04371348A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- coating agent
- mold coating
- coating material
- dispersant
- 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.)
- Withdrawn
Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 64
- 239000000463 material Substances 0.000 title claims abstract description 14
- 238000005266 casting Methods 0.000 title claims description 28
- 238000000576 coating method Methods 0.000 title abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000002270 dispersing agent Substances 0.000 claims abstract description 20
- 235000013312 flour Nutrition 0.000 claims abstract description 19
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 11
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010439 graphite Substances 0.000 claims abstract description 8
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 7
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 6
- 239000004640 Melamine resin Substances 0.000 claims abstract description 6
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000391 magnesium silicate Substances 0.000 claims abstract description 6
- 229910052919 magnesium silicate Inorganic materials 0.000 claims abstract description 6
- 235000019792 magnesium silicate Nutrition 0.000 claims abstract description 6
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 5
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000011819 refractory material Substances 0.000 claims abstract description 4
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 claims 1
- 239000004576 sand Substances 0.000 abstract description 15
- 235000013339 cereals Nutrition 0.000 abstract description 7
- HIEHAIZHJZLEPQ-UHFFFAOYSA-M sodium;naphthalene-1-sulfonate Chemical compound [Na+].C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 HIEHAIZHJZLEPQ-UHFFFAOYSA-M 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 1
- 239000010445 mica Substances 0.000 abstract 1
- 229910052618 mica group Inorganic materials 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 239000011247 coating layer Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 239000002904 solvent Substances 0.000 description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000003755 preservative agent Substances 0.000 description 4
- 229910001141 Ductile iron Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000002335 preservative effect Effects 0.000 description 3
- -1 triazine compound Chemical class 0.000 description 3
- 230000000573 anti-seizure effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000013142 basic testing Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010406 interfacial reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、鋳物の鋳型造型後に鋳
型の溶湯鋳込み面に塗布する鋳物用塗型剤に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating agent for castings that is applied to the molten metal pouring surface of a casting mold after the casting mold is formed.
【０００２】0002
【従来の技術】従来の鋳物作業において、溶融金属と鋳
型の界面反応を防止して滑らかな鋳肌を作り、あるいは
、型ばらし時に鋳物と鋳物砂との間の砂離れを良くする
ため、鋳型表面に鋳物用塗型剤を施す作業が行われてい
る。この場合、鋳物用塗布剤の条件としては、鋳型表面
に対する塗布の容易性、溶融金属の注湯温度に耐える十
分な耐熱性、鋳型に対する十分な接着性、乾燥後におけ
る表面安定性など多岐にわたっているが、これら諸条件
の中で、鋳物の品質確保のため、および、鋳物の表面の
焼着きの仕上げ工数の簡素化を図るためには、耐焼着性
すなわち、高温の溶湯を鋳込んだ際に、溶湯と塗型剤と
の化学反応によって塗型剤が鋳物に融着しない性質、お
よび、鋳型を形成する砂の粒子間隙に溶湯が侵入する差
し込み現象を防ぐ性質が要求されている。[Prior Art] In conventional casting operations, molds are used to prevent interfacial reactions between molten metal and the mold to create a smooth casting surface, or to improve sand separation between the casting and molding sand during mold disassembly. Work is underway to apply a foundry coating to the surface. In this case, the conditions for the foundry coating agent are wide-ranging, including ease of application to the mold surface, sufficient heat resistance to withstand the temperature at which molten metal is poured, sufficient adhesion to the mold, and surface stability after drying. However, within these conditions, in order to ensure the quality of castings and to simplify the number of finishing steps required to prevent burning on the surface of castings, it is necessary to The mold coating agent is required to have properties that prevent it from fusing to the casting due to a chemical reaction between the molten metal and the mold coating agent, and properties that prevent the molten metal from penetrating into the gaps between the particles of the sand forming the mold.
【０００３】塗型剤およびその塗布手段に関して、耐焼
着性を向上させるために、塗型剤を厚塗りしたり、二度
塗りをするか、または鋳型を形成する砂の粒子間隙への
塗布剤の浸透、すなわち、目潰しが基本的な対応策とし
て実施されている。このため、塗型剤に砂型や中子に対
する浸透性をもたせたアルコール系の浸透塗型剤も既に
市販されている。しかしながら、この浸透塗型剤は飽く
までも下地塗型剤としての役割を果たすのみで、取扱い
の容易な水性で耐焼着性に優れた浸透性の塗型剤は見当
らないのが現状である。Regarding the mold coating agent and its application means, in order to improve the seizing resistance, the mold coating agent may be applied thickly or twice, or the coating agent may be applied to the gaps between the sand particles forming the mold. The basic countermeasure is to disseminate information, that is, to blind people. For this reason, alcohol-based penetrating mold coating agents that have permeability into sand molds and cores are already on the market. However, this penetrating coating agent only serves as a base coating agent, and at present there is no easy-to-handle, water-based, penetrating coating agent with excellent seizing resistance.
【０００４】図２に示す模式図に従来から行われている
鋳型表面近傍の断面状態を示す。図２において、１は塗
膜層、２は砂粒である。鋳物砂で造型された鋳型の表面
に、塗型剤を塗布して塗膜層１を形成する。塗型剤は砂
粒２の間隙には浸透しないで、鋳型表面に付着するのみ
である。The schematic diagram shown in FIG. 2 shows a cross-sectional state near the surface of a mold that has been conventionally used. In FIG. 2, 1 is a coating layer and 2 is a sand grain. A coating agent is applied to the surface of a mold made of foundry sand to form a coating layer 1. The mold coating agent does not penetrate into the gaps between the sand grains 2, but only adheres to the surface of the mold.
【０００５】[0005]
【発明が解決しようとする課題】塗型剤は、前述のよう
に溶湯の鋳込み中に塗膜が鋳型から剥離しないことや、
耐焼着性に富むことが要求されるが、従来のように耐焼
着性を向上させるために塗膜を厚くすると、塗膜剥離に
よる鋳造欠陥が生じ、また、鋳込み時に塗型剤自体から
発生するガス、あるいは鋳型から発生するガスにも影響
を及ぼしてガス欠陥を生じることが多い。そのため、鋳
型表面近傍２〜５ｍｍ程度の砂粒間隙を目潰しできる塗
型剤、特に取扱いの容易な水性塗型剤が期待されている
。[Problems to be Solved by the Invention] As mentioned above, the mold coating agent is such that the coating film does not peel off from the mold during pouring of the molten metal, and
High anti-seizure properties are required, but if the coating film is thickened in order to improve anti-seizure properties as in the past, casting defects may occur due to peeling of the coating film, and defects may also occur from the coating agent itself during casting. It often affects the gas or the gas generated from the mold, resulting in gas defects. Therefore, there is a need for a mold coating agent that can fill the gaps between sand grains of about 2 to 5 mm near the mold surface, especially a water-based mold coating agent that is easy to handle.
【０００６】本発明は前記の問題点に鑑み提案するもの
であって、その目的とするところは、塗型剤の塗布作業
の簡素化を図り、併せて塗型剤の管理の円滑化を可能と
した鋳物用塗型剤を提供しようとする点にある。The present invention has been proposed in view of the above-mentioned problems, and its purpose is to simplify the work of applying a mold coating agent and also to facilitate the management of the mold coating agent. The purpose of the present invention is to provide a mold coating agent for castings that has the following characteristics.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明の鋳型用塗型剤は、ジルコンフラワー、シ
リカフラワー、黒鉛、酸化マグネシウム、クロマイトフ
ラワー、セリサイト（絹雲母）などの耐火物を選択的に
配合した基剤に、粘結剤としてメラミン樹脂、無機分散
剤として含水珪酸マグネシウムまたは含水珪酸アルミニ
ウム、有機分散剤としてナフタリンスルフォン酸ソーダ
縮合物、浸透剤として非イオン系界面活性剤とブチルセ
ロソルブアルコールなどの混合液を配合したことを特徴
とする。[Means for Solving the Problems] In order to achieve the above object, the mold coating agent of the present invention contains zircon flour, silica flour, graphite, magnesium oxide, chromite flour, sericite, etc. A base material selectively blended with refractories, melamine resin as a binder, hydrated magnesium silicate or hydrated aluminum silicate as an inorganic dispersant, sodium naphthalene sulfonate condensate as an organic dispersant, and nonionic surfactant as a penetrant. It is characterized by containing a mixed liquid such as agent and butyl cellosolve alcohol.
【０００８】[0008]
【作用】本発明の鋳物用塗型剤は、基剤となる耐火物と
してジルコンフラワー、シリカフラワー、黒鉛、酸化マ
グネシウム、クロマイトフラワー、セリサイトなどを選
択的に配合し、この基剤に、塗型剤管理の容易性、塗型
剤性状の安定化、作業性、鋳物の品質などの観点から、
無機分散剤、有機分散剤、無機および有機粘結剤、界面
活性剤、防腐剤、溶媒などを配合している。[Function] The casting mold coating agent of the present invention selectively blends zircon flour, silica flour, graphite, magnesium oxide, chromite flour, sericite, etc. as a refractory base material, and coats the mold with this base material. From the viewpoints of ease of mold agent management, stabilization of mold coating agent properties, workability, quality of castings, etc.
Contains inorganic dispersants, organic dispersants, inorganic and organic binders, surfactants, preservatives, solvents, etc.
【０００９】本発明の鋳物用塗型剤の作用を詳述すると
、耐火物としてジルコンフラワー、シリカフラワー、黒
鉛、酸化マグネシウム、クロマイトフラワー、セリサイ
トなどを選択的に配合することにより、耐火物の粒度体
形の調整を容易にし、この粒度体形の調整の容易な耐火
物と非イオン系界面活性剤入りブチルセロソルブ混合液
の作用によって、高密度で均一な浸透層と塗型層が形成
され、焼着防止と塗型剤剥離防止効果が得られる。To explain in detail the action of the coating agent for castings of the present invention, by selectively blending zircon flour, silica flour, graphite, magnesium oxide, chromite flour, sericite, etc. as refractories, The particle size and shape can be easily adjusted, and due to the action of the refractory whose particle size and shape can be easily adjusted and the butyl cellosolve mixture containing a nonionic surfactant, a dense and uniform penetration layer and coating layer are formed, which prevents baking. Prevention and coating agent peeling prevention effect can be obtained.
【００１０】また、耐火物組成および分散剤であるナフ
タリンスルホン酸ソーダ、含水珪酸マグネシウムまたは
含水珪酸アルミニウムなどの作用により、高密度で、し
かも緩衝性のある塗膜層が形成されるため、塗型剤を塗
布した後に、強制乾燥などにより乾燥させた場合でも塗
膜に亀裂が生じないし、また溶湯圧による塗膜の剥離な
どに対する耐衝撃性に優れたものが得られる。そして、
本発明による鋳物用塗型剤は水溶性であるから、その取
扱いが簡易である。上記の水性塗型剤を塗布した鋳型表
面近傍の断面の模式図を図１に示す。図１に示すように
、本発明による水性塗型剤は鋳型に塗布した際に、砂粒
２の間隙に１〜８ｍｍの塗型剤浸透層３を形成した後、
塗膜層１が形成されるのである。[0010] Furthermore, due to the refractory composition and the action of dispersants such as sodium naphthalene sulfonate, hydrated magnesium silicate, or hydrated aluminum silicate, a coating layer with high density and buffering properties is formed, so that the coating layer is Even when dried by forced drying after applying the agent, the coating film does not crack and has excellent impact resistance against peeling of the coating film due to the pressure of the molten metal. and,
Since the casting mold coating agent according to the present invention is water-soluble, it is easy to handle. FIG. 1 shows a schematic cross-sectional view of the vicinity of the mold surface coated with the above water-based mold coating agent. As shown in FIG. 1, when the water-based mold coating agent according to the present invention is applied to a mold, after forming a mold coating agent permeation layer 3 of 1 to 8 mm in the gaps between the sand grains 2,
A coating layer 1 is thus formed.
【００１１】[0011]
【実施例】本発明に係る鋳物用塗型剤の組成の実施例を
以下に示す。
実施例１
耐火物（基剤）
１００部（鱗状黒鉛）
（ジルコンフラワー）
（ジルコンフラワー 微粉）
分散剤
３．０部（無機分散剤 含水珪酸マグネシ
ウム）（有機分散剤 ナフタリンスルフォン酸ソーダ
）粘結剤
０．４部（メラミン樹脂）
浸透剤
１．７部（非イオン系界面活性剤入りブチル
セロソルブアルコール液）防腐剤
０．１部（トリア
ジン系化合物）
溶媒
２５部（水）
実施例２
耐火物（基剤）
１００部（鱗状黒鉛）
（ジルコンフラワー）
（ジルコンフラワー 微粉）
分散剤
２．０部（無機分散剤 含水珪酸アルミニ
ウム）（有機分散剤 ナフタリンスルフォン酸ソーダ
）粘結剤
０．４部（メラミン樹脂）
浸透剤
１．７部（非イオン系界面活性剤入りブチル
セロソルブアルコール液）防腐剤
０．１部（トリア
ジン系化合物）
溶媒
２５部（水）
実施例３
耐火物（基剤）
１００部（鱗状黒鉛）
（ジルコンフラワー）
（ジルコンフラワー 微粉）
（セリサイト）
分散剤
３．５部（無機分散剤 含水珪酸マグネシ
ウム）（無機分散剤 含水珪酸アルミニウム）（有機
分散剤 ナフタリンスルフォン酸ソーダ）粘結剤
０．４部（メラミン樹脂）
浸透剤
１．７部（非イオン系界面活性剤入りブチル
セロソルブアルコール液）防腐剤
０．１部（トリア
ジン系化合物）
溶媒
２５部（水）
実施例１、実施例２および実施例３とも、基礎試験結果
に基づき、塗型剤の濃度をボーメ比重計におけるスケー
ルの読みで４５ボーメおよび５５ボーメに設定し、主型
および中子を共にフラン系鋳物砂で造型した単重４００
ｋｇの印刷機部品の鋳型表面にテスト１として、実施例
３に示す塗型剤を４５ボーメの濃度に調整して塗布し、
さらに実施例３の塗型剤の濃度を５５ボーメに調整して
塗布した。またテスト２として、実施例３に示す塗型剤
を５５ボーメの濃度に調整して塗布した。これらテスト
１およびテスト２の鋳型を用いて焼着を著しく発生し易
いダクタイル鋳鉄品（球状黒鉛鋳鉄品：材質ＪＩＳ−Ｆ
ＣＤ４５０）約４００ｋｇの印刷部品に鋳込温度１４０
０℃で鋳込み、鋳放し状態における鋳肌表面状況を調査
した。[Example] Examples of the composition of the casting mold coating agent according to the present invention are shown below. Example 1 Refractory (base material)
100 parts (scaly graphite) (zircon flour) (zircon flour fine powder) Dispersant
3.0 parts (Inorganic dispersant: Hydrous magnesium silicate) (Organic dispersant: Sodium naphthalene sulfonate) Binder
0.4 parts (melamine resin) Penetrant
1.7 parts (butyl cellosolve alcohol solution with nonionic surfactant) Preservative
0.1 part (triazine compound) Solvent
25 parts (water) Example 2 Refractory (base)
100 parts (scaly graphite) (zircon flour) (zircon flour fine powder) Dispersant
2.0 parts (Inorganic dispersant: Hydrous aluminum silicate) (Organic dispersant: Sodium naphthalene sulfonate) Binder
0.4 parts (melamine resin) Penetrant
1.7 parts (butyl cellosolve alcohol solution with nonionic surfactant) Preservative
0.1 part (triazine compound) Solvent
25 parts (water) Example 3 Refractory (base)
100 parts (scaly graphite) (zircon flour) (zircon flour fine powder) (sericite) Dispersant
3.5 parts (Inorganic dispersant: Hydrous magnesium silicate) (Inorganic dispersant: Hydrous aluminum silicate) (Organic dispersant: Sodium naphthalene sulfonate) Binder
0.4 parts (melamine resin) Penetrant
1.7 parts (butyl cellosolve alcohol solution with nonionic surfactant) Preservative
0.1 part (triazine compound) Solvent
25 parts (water) In all of Example 1, Example 2, and Example 3, based on the basic test results, the concentration of the coating agent was set to 45 Baume and 55 Baume according to the scale reading on the Baume hydrometer, and the main mold and Unit weight: 400 with both cores made of furan-based casting sand
As test 1, the mold coating agent shown in Example 3 was adjusted to a concentration of 45 Baumé and applied to the mold surface of a kg printing press part.
Further, the coating agent of Example 3 was applied at a concentration of 55 Baume. As Test 2, the coating agent shown in Example 3 was applied at a concentration of 55 Baumé. These test 1 and test 2 molds were used to test ductile cast iron products (spheroidal graphite cast iron products: material JIS-F
CD450) Casting temperature 140 for approximately 400 kg of printed parts
The surface condition of the cast surface in the as-cast state after casting at 0°C was investigated.
【００１２】その結果、従来方法であるフラン系鋳物砂
で造型した鋳型表面にアルコール系浸透塗型剤を塗布し
た後、水性塗型剤を塗布した二度塗り鋳型を用いて、テ
スト１およびテスト２と同一の鋳込温度のダクタイル鋳
鉄品と比較調査したが、その鋳放しにおける鋳肌表面状
況は、テスト１およびテスト２の場合共、従来方法によ
る場合に比して著しく改善され、従来方法のようにアル
コール系浸透塗型剤の下塗り工程の省略が可能である結
果が判明した。As a result, Test 1 and Test 1 were conducted using a two-coat mold in which an alcohol-based penetrating molding agent was applied to the surface of a mold made using furan-based foundry sand using the conventional method, and then a water-based molding agent was applied. A comparative study was carried out with ductile cast iron products at the same casting temperature as in Test 1 and Test 2, and the surface condition of the as-cast surface was significantly improved compared to the conventional method in both Tests 1 and 2. The results showed that it was possible to omit the undercoating step using an alcohol-based penetrating coating agent.
【００１３】上記実施例１、実施例２および実施例３に
示す組成の塗型剤の濃度をボーメ比重計におけるスケー
ルの読みで３０ボーメ〜８０ボーメに調整し、フラン計
鋳物砂プロセス鋳型をドブ漬け（１秒間浸漬）し、鋳型
に対する塗型剤の浸透深さを調査した結果の一例を図３
に示す。図３によれば、ドブ漬け（１秒間浸漬）により
鋳型表面近傍に３〜５ｍｍの塗型剤浸透層を形成するに
は、上記組成の塗型剤の濃度を４０ボーメ〜５５ボーメ
程度に調整すれば良いことが判る。The concentration of the coating agent having the composition shown in Examples 1, 2, and 3 above was adjusted to 30 Baume to 80 Baume according to the scale reading on the Baume hydrometer, and the Franc foundry sand process mold was placed in the drain. Figure 3 shows an example of the results of investigating the penetration depth of the coating agent into the mold by soaking it (immersion for 1 second).
Shown below. According to FIG. 3, in order to form a coating agent permeation layer of 3 to 5 mm near the mold surface by dipping (dipping for 1 second), the concentration of the coating agent with the above composition is adjusted to about 40 Baume to 55 Baume. You'll know what to do.
【００１４】[0014]
【発明の効果】本発明の鋳物用塗型剤は、鋳型や中子の
砂粒間隙へ高密度で均一な塗型剤浸透層を形成する水性
塗型剤であることから、溶媒として水を用いその濃度調
整が容易で材料費を低減できるばかりでなく、有機溶媒
を使用する場合のように、局所排気装置の設置や定期健
康診断の実施など有機則に関する規則を受けない。また
下地塗型剤の塗布が不要となり、塗型剤塗布工数が大幅
に改善され、塗型剤の在庫管理が簡易になる。さらに、
鋳物焼着が大幅に減少することから、鋳仕上げ工数が大
幅に短縮できる。したがって、疲弊作業や振動工具など
の使用による鋳仕上げ作業が軽減できる効果がある。Effects of the Invention The foundry coating agent of the present invention is a water-based coating agent that forms a high-density and uniform coating agent permeation layer into the sand grain gaps of molds and cores, so it uses water as a solvent. Not only can the concentration be easily adjusted, reducing material costs, but unlike the use of organic solvents, organic solvents are not subject to regulations such as the installation of local exhaust systems and periodic health checkups. Furthermore, there is no need to apply a base coating agent, the number of steps required for applying the coating agent is greatly improved, and inventory management of the coating agent is simplified. moreover,
Casting burn-out is significantly reduced, so casting finishing man-hours can be significantly reduced. Therefore, there is an effect that fatigue work and casting finishing work due to the use of vibrating tools can be reduced.
【図１】本発明の鋳物用塗型剤による鋳型表面近傍の断
面の模式図である。FIG. 1 is a schematic diagram of a cross section near the surface of a mold coated with a mold coating agent for foundries of the present invention.
【図２】従来の鋳物用塗型剤による鋳型表面近傍の断面
の模式図である。FIG. 2 is a schematic diagram of a cross section near the surface of a mold using a conventional casting mold coating agent.
【図３】本発明の塗型剤の濃度と浸透深さの関係を示す
図表である。FIG. 3 is a chart showing the relationship between the concentration and penetration depth of the mold coating agent of the present invention.
１ 塗膜層 ２ 砂粒 ３ 塗型剤浸透層 1 Paint layer 2 Grains of sand 3 Coating agent permeation layer
Claims (2)
黒鉛、酸化マグネシウム、クロマイトフラワー、セリサ
イト（絹雲母）などの耐火物を選択的に配合した基剤に
、粘結剤としてメラミン樹脂、無機分散剤として含水珪
酸マグネシウム、有機分散剤としてナフタリンスルフォ
ン酸ソーダ縮合物、浸透剤として非イオン系界面活性剤
とブチルセロソルブアルコールなどの混合液を配合した
ことを特徴とする鋳物用塗型剤。[Claim 1] Zircon flower, silica flower,
A base material selectively blended with refractories such as graphite, magnesium oxide, chromite flour, and sericite, with melamine resin as a binder, hydrous magnesium silicate as an inorganic dispersant, and naphthalene sulfonic acid as an organic dispersant. A casting mold coating agent characterized by containing a soda condensate, a mixture of a nonionic surfactant as a penetrating agent, and butyl cellosolve alcohol.
水珪酸アルミニウムを用いることを特徴とする請求項１
記載の鋳物用塗型剤。[Claim 2] Claim 1 characterized in that hydrous aluminum silicate is used as the inorganic dispersant in Claim 1.
Coating agent for castings described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14576291A JPH04371348A (en) | 1991-06-18 | 1991-06-18 | Mold coating material for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14576291A JPH04371348A (en) | 1991-06-18 | 1991-06-18 | Mold coating material for casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04371348A true JPH04371348A (en) | 1992-12-24 |
Family
ID=15392577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14576291A Withdrawn JPH04371348A (en) | 1991-06-18 | 1991-06-18 | Mold coating material for casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04371348A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007144511A (en) * | 2005-10-31 | 2007-06-14 | Kao Corp | Structural body for producing casting |
| CN105108054A (en) * | 2015-09-28 | 2015-12-02 | 山东永和精密金属有限公司 | Transition layer coating for manufacturing shell of precision casting and preparation method of transition layer coating |
| CN111774520A (en) * | 2020-07-22 | 2020-10-16 | 郑州翔宇铸造材料有限公司 | Lost foam coating for cast iron and preparation method thereof |
-
1991
- 1991-06-18 JP JP14576291A patent/JPH04371348A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007144511A (en) * | 2005-10-31 | 2007-06-14 | Kao Corp | Structural body for producing casting |
| CN105108054A (en) * | 2015-09-28 | 2015-12-02 | 山东永和精密金属有限公司 | Transition layer coating for manufacturing shell of precision casting and preparation method of transition layer coating |
| CN105108054B (en) * | 2015-09-28 | 2016-05-04 | 山东永和精密金属有限公司 | A kind of precision casting transition zone coating and its preparation method and application for shell processed |
| CN111774520A (en) * | 2020-07-22 | 2020-10-16 | 郑州翔宇铸造材料有限公司 | Lost foam coating for cast iron and preparation method thereof |
| CN111774520B (en) * | 2020-07-22 | 2021-10-15 | 郑州翔宇铸造材料有限公司 | Lost foam coating for cast iron and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980903 |