JP4817136B2 - Method for producing water-based coating agent for infrared dryer - Google Patents
Method for producing water-based coating agent for infrared dryer Download PDFInfo
- Publication number
- JP4817136B2 JP4817136B2 JP2001169265A JP2001169265A JP4817136B2 JP 4817136 B2 JP4817136 B2 JP 4817136B2 JP 2001169265 A JP2001169265 A JP 2001169265A JP 2001169265 A JP2001169265 A JP 2001169265A JP 4817136 B2 JP4817136 B2 JP 4817136B2
- Authority
- JP
- Japan
- Prior art keywords
- coating agent
- infrared
- coating composition
- water
- absorption
- 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
- 239000011248 coating agent Substances 0.000 title claims description 55
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title description 19
- 238000010521 absorption reaction Methods 0.000 claims description 30
- 239000008199 coating composition Substances 0.000 claims description 23
- 238000002156 mixing Methods 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 238000000862 absorption spectrum Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 description 25
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 13
- 238000000576 coating method Methods 0.000 description 11
- 239000011230 binding agent Substances 0.000 description 8
- 239000000375 suspending agent Substances 0.000 description 7
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 6
- 238000005266 casting Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 230000001476 alcoholic effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000573 anti-seizure effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 235000021388 linseed oil Nutrition 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920003987 resole Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Images
Landscapes
- Mold Materials And Core Materials (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、水性塗型剤を塗布した鋳型を赤外線乾燥機で乾燥する場合の乾燥時間の速い水性塗型剤の作製方法に関する。
【０００２】
【従来の技術】
鋳型用の塗型剤は、従来はアルコール性塗型剤が主であり、これは塗布後に着火乾燥することで溶剤であるアルコールを迅速に燃焼・気化させ、鋳型に塗型を被覆させる。この方法では着火乾燥時のCO2を含む燃焼ガス発生、高温の炎による作業環境の悪化、燃焼による鋳型の脆化等の問題が存在する。そのために、塗型剤の溶剤として、環境に対する悪化等の問題の発生しない水を溶剤とする塗型剤、すなわち水性塗型剤への転換が望まれている。しかしながら、この水性塗型剤の使用に当たっては、アルコール性塗型剤で行っていた着火乾燥による乾燥方式が不可能である。何らかの乾燥機による水分の気化工程が必要となる。この乾燥機として、熱風乾燥機、マイクロ波乾燥機及び赤外線乾燥機が使用される。熱風乾燥機は作業環境を悪化されることから、またマイクロ波乾燥機は塗型を施す鋳型で最も生産量の多い鋳型であるフラン鋳型において誘電率が高く鋳型が高温になる問題から使用できないことから、今後は遠赤外線乾燥機を含む赤外線乾燥機が主流になると考えられる。
【０００３】
【発明が解決しようとする課題】
しかしながら、赤外線乾燥機による水性塗型剤の乾燥時間は、アルコール性塗型剤の着火乾燥と比較した場合、極めて長いために作業時間短縮上からその乾燥時間短縮が望まれている。そこで、本発明は、乾燥時間の短縮を図ることができる赤外線乾燥機用水性塗型剤の製造方法を提供せんとするものである。
【０００４】
【課題を解決するための手段】
水性塗型剤を塗布した鋳型を赤外線乾燥機で乾燥する際に、水性塗型剤に赤外線の吸収効率の高い塗型構成物を用いることで、溶剤としての水の気化を促進し、水性塗型剤の乾燥時間を速めることがその解決方法として考えられる。そこで本発明者たちは、吸収効率の高い塗型構成物を見出す手段として、個々の塗型構成物の赤外線吸収スペクトルと赤外線乾燥機から放射される赤外線放射率を測定することで、計算により各々の塗型構成物の赤外線吸収効率効率を求め、これを利用した乾燥時間の短い塗型構成物の開発が出来ないか検討した。
【０００５】
赤外線の放射率と各物質の吸収率をそれぞれの波長ｘ（μｍ）を変数とする関数と考え、各塗型構成物の吸収率を以下と仮定する。
赤外線の放射率：ｒ（ｘ）
塗型構成物−１（水）の吸収率：ｆ1（ｘ）
塗型構成物−２の吸収率：ｆ2（ｘ）
塗型構成物−３の吸収率：ｆ3（ｘ）
・
・
・
・
塗型構成物−ｎの吸収率：ｆn（ｘ）
また、塗型剤として用いた各塗型構成物の質量パーセントをそれぞれ、ｗ１、ｗ２、ｗ３、ｗ４、・・・・・・とし、遠赤外線の放射量ｘを変数とする確率密度関数ｆｒ（ｘ）として、次の式１のように定義する。
【０００６】
【式１】
ｆｒ（ｘ）は確率密度関数であるので、式２となる。このようにそれぞれの関数を定義すると、ある塗型剤の種別に対して、その塗型剤を遠赤外線乾燥機で乾燥させる乾燥効率ηは、式３のように仮定して計算することができる。遠赤外線の放射率並びに塗型に含まれる物質の吸収率は図１に示した。
【０００８】
【式２】
【式３】
次に、式３を検証するために塗型に含まれる塗型構成物を２種類変化させて水性塗型剤を試作し乾燥時間を測定した。その結果を図２に示す。式３により求めた乾燥効率ηは実測乾燥時間とよく対応しており、遠赤外線の放射率と塗型構成物の吸収率から乾燥効率を求める仮説は成り立つ。図３には製品であるの水性塗型剤を用いて、乾燥効率と乾燥時間の関係を示した。製品では２０種類程度の塗型構成物や粘結剤等が含まれ、全ての吸収率を測定していないために、測定を行った塗型構成物（図中にその合計量を示す）のみで乾燥効率を求めた。これにおいても、吸収率と乾燥効率がよく対応している。以下、この乾燥効率を、吸収効率という。
【００１１】
この吸収効率が、０．３５以上、特に０．４０以上である水性塗型剤は極めて乾燥時間が迅速となる。０．４０以上となる水性塗型剤の構成物としては、アルミナ質耐火物が全耐火物中の40重量部以上配合されていることが望ましい。なお、水性塗型剤の構成物としては、耐火物、水、粘結剤、懸濁剤からなり、懸濁剤は少量である。耐火物がおよそ５５〜６５％、水がおよそ２５から３５％、粘結剤はおよそ５％、懸濁剤はおよそ５％以下であることが望ましい。
以上、本発明は、水性塗型剤を構成する個々の塗型構成物について、３μｍ〜１０μｍを含む波長に対する吸収率の赤外線吸収スペクトルを測定すると共に、赤外線乾燥機より放射される前記波長における赤外線放射率を測定し、前記量測定結果の間に吸収効率を求め、これにより配合する塗型構成物とその配合率を決定し、この配合率に基づき水性塗型剤を構成する各塗型構成物を配合するものであり、前記吸収効率は、前記測定結果の赤外線放射率と、前記測定結果の個々の塗型構成物の赤外線の吸収率と、前記個々の塗型構成物の質量パーセントとから求められるものであり、且つ、求められた吸収効率に基づき前記の配合する物質とその配合率を決定することを特徴とする水性塗型剤の製造方法を提供する。
【００１２】
【発明の実施の形態】
本発明では粘結剤と懸濁剤の吸収効率は低くかつその量が少ないことから、耐火物に注目して種々の耐火物の吸収効率を測定し、アルミナ質耐火物の吸収効率が高いことを見出した。すなわち、アルミナ質耐火物とは、Al2O3を成分あるいは主成分とするアルミナ、コランダム、アルミナセラミックス、アルミナホワイトウェア、アルミナシリコン、アルミナジルコン、アルミナセメント、アルミナゲル等の一種もしくは二種以上組み合わせからなる。
【００１３】
水性塗型剤を塗布する鋳型としては、フラン鋳型、アルカリフェノール鋳型、コールドボックス鋳型、シェル鋳型、生型、精密鋳造用鋳型、金型、消失模型、Ｖプロセス等の鉄鋳物、アルミ鋳物、銅鋳物等の各種合金の鋳造に用いられる各種鋳型である。
【００１４】
水性塗型剤の構成物である耐火物とは、塗型に耐火性を付与し得る物質であり、一般に、黒鉛、石炭粉、シリカ、ジルコン、酸化鉄、雲母、タルク、カ焼マグネシウム、クロマイト、オリビン、シャモット等が使用される。本発明のアルミナ質耐火物に、これらを組み合わせて使用することで、塗型剤としての各種機能(焼着防止、浸炭・浸硫防止、ガス欠陥防止、塗型剤の塗布性等)を付与する。
【００１５】
本発明の塗型剤の粘結剤とは、塗型の配合物同士を粘結させる物質であり、水性塗型剤に通常使用されるような粘結剤を配合できる。すなわち、ベントナイト、粘土、澱粉、水ガラス、リン酸塩、亜硫酸塩、亜麻仁油、フェノール樹脂(レゾール)、その他水性樹脂等が配合できる。
【００１６】
本発明の懸濁剤は、水性塗型剤に必要に応じて配合されるもので、通常使用されるような懸濁剤を配合できる。すなわち、アルギン酸ナトリウム、砂糖、水溶性ポリマー、界面活性剤等が配合できる。
【００１７】
【実施例】
アルミナ質耐火物を40重量部以上含む耐火物、粘結剤、水及び懸濁剤を配合して水性塗型剤を作製し、その配合範囲の例を表１から表８に示す。また、アルミナ質耐火物を含まない塗型剤の配合範囲の例を表９から表１１に示す。
各配合範囲に該当する塗型剤を制作し、十分に攪拌・分散した塗型剤を500mlビーカーに入れ、φ28×50のフラン鋳型を５秒間ドブ漬けし、およそφ28×40の鋳型に塗型を塗布し、所定の赤外線乾燥機で乾燥までの時間を測定して、表１２に示した。また、作成した各塗型剤の遠赤外線吸収効率は前述の式３を用いて、計算によって求めて、表１２に示した。
【００１８】
【表１】
【表２】
【表３】
【表４】
【表５】
【表６】
【表７】
【表８】
【表９】
【表１０】
【表１１】
【表１２】
以上、表１〜表８の例は、表９〜表１１に比して、乾燥時間が飛躍的に短縮されたことが確認された。尚、本発明の塗型剤は、耐火物、粘結剤、水、及び、必要に応じて懸濁剤を配合して完成される。この種の塗型剤は、使用に際しては、所定量の水を加えて混練りすることによって完成され、使用されるが、塗型剤のメーカーからは、水を配合せず、あるいは僅かに配合した状態で、出荷される。上記の吸収効率は、所定量の水を加えた状態の完成状態で測定され、その値が０．３５以上であることが望ましい。但し、水は、赤外線の吸収率が低いため、実質的には吸収効率に大きな影響を与えるものではないが、水を配合しない状態で、上記の吸収効率が０．３５以上であることがより望ましい。
【００３１】
【発明の効果】
本発明は、赤外線の吸収効率が高く、その結果、塗型の乾燥時間が短い塗型構成物を、容易に得ることのできる塗型構成物の製造方法を提供することができたものである。
【図面の簡単な説明】
【図１】 本願発明の効果を示す説明図である。
【図２】 本願発明の効果を示す説明図である。
【図３】 本願発明の効果を示す説明図である。 [0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing an aqueous coating agent having a quick drying time when a mold coated with the aqueous coating agent is dried with an infrared dryer .
[0002]
[Prior art]
Conventionally, the mold coating agent is mainly an alcoholic coating agent, which is ignited and dried after application to quickly burn and vaporize alcohol as a solvent, thereby coating the mold on the mold. This method has problems such as generation of combustion gas containing CO 2 during ignition drying, deterioration of working environment due to high-temperature flame, and embrittlement of mold due to combustion. Therefore, as a solvent for the coating agent, conversion to a coating agent using water as a solvent, which does not cause problems such as deterioration of the environment, that is, an aqueous coating agent is desired. However, when using this water-based coating agent, it is impossible to perform the drying method by ignition drying which has been performed with the alcoholic coating agent. A moisture vaporization process by some kind of dryer is required. As this dryer, a hot air dryer, a microwave dryer, and an infrared dryer are used. The hot air dryer deteriorates the working environment, and the microwave dryer cannot be used due to the problem that the mold has a high dielectric constant and the mold becomes hot in the furan mold that is the most produced mold. Therefore, it is thought that infrared dryers including far-infrared dryers will become mainstream in the future.
[0003]
[Problems to be solved by the invention]
However, the drying time of the water-based coating agent by the infrared dryer is extremely long when compared with the ignition drying of the alcoholic coating agent, so that it is desired to shorten the drying time from the viewpoint of shortening the working time. Therefore, the present invention is intended to provide a method for producing a water-based coating agent for an infrared dryer capable of shortening the drying time.
[0004]
[Means for Solving the Problems]
When a mold coated with an aqueous coating agent is dried with an infrared dryer, the use of a coating composition having a high infrared absorption efficiency for the aqueous coating agent facilitates the vaporization of water as a solvent. One solution to this problem is to increase the drying time of the mold. Therefore, the present inventors measured the infrared absorption spectrum of each coating composition and the infrared emissivity emitted from the infrared dryer as a means for finding a coating composition having high absorption efficiency, and calculated each by calculation. The efficiency of infrared absorption of the coating composition was determined, and it was examined whether a coating composition with a short drying time could be developed.
[0005]
The infrared emissivity and the absorptance of each substance are considered as functions having the respective wavelengths x (μm) as variables, and the absorptance of each coating composition is assumed as follows.
Infrared emissivity: r (x)
Absorption rate of coating composition-1 (water): f1 (x)
Absorption rate of coating composition-2: f2 (x)
Absorption rate of coating composition-3: f3 (x)
・
・
・
・
Absorption rate of coating composition-n: fn (x)
In addition, the mass percentage of each coating composition used as a coating agent is w1, w2, w3, w4,..., And the probability density function fr ( x) is defined as the following Expression 1.
[0006]
[Formula 1]
Since fr (x) is a probability density function, Equation 2 is obtained. When each function is defined in this way, the drying efficiency η for drying the coating agent with a far-infrared dryer for a certain coating agent type can be calculated on the assumption of
[0008]
[Formula 2]
[Formula 3]
Next, in order to verify Formula 3, two types of coating composition contained in the coating mold were changed, and a water-based coating agent was prototyped and the drying time was measured. The result is shown in FIG. The drying efficiency η determined by
[0011]
An aqueous coating agent having an absorption efficiency of 0.35 or more, particularly 0.40 or more has a very rapid drying time. As a constituent of the aqueous coating agent to be 0.40 or more, it is desirable that 40 parts by weight or more of alumina refractory is blended in all refractories. The composition of the aqueous coating agent is composed of a refractory, water, a binder, and a suspending agent, and the amount of the suspending agent is small. Desirably, the refractory is about 55-65%, water is about 25-35%, the binder is about 5%, and the suspension is about 5% or less.
As mentioned above, this invention measures the infrared absorption spectrum of the absorptance with respect to the wavelength containing 3 micrometers-10 micrometers about each coating type composition which comprises an aqueous coating agent, and is infrared rays in the said wavelength radiated | emitted from an infrared dryer. Measure the emissivity, determine the absorption efficiency during the amount measurement result, determine the coating composition to be blended and its blending ratio, and each coating composition constituting the aqueous coating agent based on this blending ratio The absorption efficiency includes the infrared emissivity of the measurement result, the infrared absorption rate of the individual coating composition of the measurement result, and the mass percentage of the individual coating composition. And a method for producing an aqueous coating agent, wherein the substance to be blended and the blending ratio thereof are determined based on the obtained absorption efficiency .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the absorption efficiency of the binder and the suspending agent is low and the amount thereof is small, so paying attention to the refractory, the absorption efficiency of various refractories is measured, and the absorption efficiency of the alumina refractory is high. I found. In other words, the alumina refractory is one or a combination of two or more of alumina, corundum, alumina ceramics, alumina whiteware, alumina silicon, alumina zircon, alumina cement, alumina gel, etc. whose main component is Al 2 O 3 Consists of.
[0013]
As molds for applying aqueous coating agents, furan molds, alkali phenol molds, cold box molds, shell molds, green molds, precision casting molds, molds, vanishing models, iron castings such as V processes, aluminum castings, copper Various molds used for casting various alloys such as castings.
[0014]
A refractory that is a constituent of an aqueous coating agent is a substance that can impart fire resistance to a coating mold, and is generally graphite, coal powder, silica, zircon, iron oxide, mica, talc, calcined magnesium, chromite. Olivine, chamotte, etc. are used. By using these in combination with the alumina-based refractory of the present invention, various functions as a coating agent (anti-seizure, carburizing / sulfurizing prevention, gas defect prevention, coating agent coating property, etc.) are imparted. To do.
[0015]
The binder of the coating agent of the present invention is a substance that caulks together the coating composition, and a binder that is usually used in aqueous coating agents can be blended. That is, bentonite, clay, starch, water glass, phosphate, sulfite, linseed oil, phenol resin (resole), other aqueous resins, and the like can be blended.
[0016]
The suspending agent of the present invention is blended in the aqueous coating agent as necessary, and a suspending agent as commonly used can be blended. That is, sodium alginate, sugar, a water-soluble polymer, a surfactant and the like can be blended.
[0017]
【Example】
An aqueous coating agent is prepared by blending a refractory containing 40 parts by weight or more of an alumina refractory, a binder, water and a suspending agent . Examples of the blending range are shown in Tables 1 to 8. Also, Table 11 shows examples of compounding range of coating agent containing no alumina refractories from Table 9.
Produce a coating agent corresponding to each blending range, put a sufficiently stirred and dispersed coating agent in a 500 ml beaker, soak a 2828 × 50 furan mold for 5 seconds, and apply to a φ28 × 40 mold. The time until drying was measured with a predetermined infrared dryer, and the results are shown in Table 12. Moreover, the far-infrared absorption efficiency of each created coating agent was calculated | required by calculation using the above-mentioned
[0018]
[Table 1]
[Table 2]
[Table 3]
[Table 4]
[Table 5]
[Table 6]
[Table 7]
[Table 8]
[Table 9]
[Table 10]
[Table 11]
[Table 12]
As mentioned above, it was confirmed that the example of Table 1-Table 8 drastically shortened drying time compared with Table 9-Table 11. The coating agent of the present invention is completed by blending a refractory, a binder, water, and, if necessary, a suspending agent. This type of coating agent is completed and used by adding and kneading a predetermined amount of water in use, but from the manufacturer of the coating agent, water is not blended or slightly blended. Shipped in the same state. The absorption efficiency is measured in a completed state with a predetermined amount of water added, and the value is desirably 0.35 or more. However, since water has a low infrared absorption rate, water does not substantially affect the absorption efficiency. However, in the state where water is not blended, the above absorption efficiency is more than 0.35. desirable.
[0031]
【The invention's effect】
The present invention has been able to provide a method for producing a coating composition that can easily provide a coating composition having high infrared absorption efficiency and a short drying time of the coating mold. .
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing the effect of the present invention.
FIG. 2 is an explanatory diagram showing effects of the present invention.
FIG. 3 is an explanatory diagram showing effects of the present invention.
Claims (1)
前記吸収効率は、前記測定結果の赤外線放射率と、前記測定結果の個々の塗型構成物の赤外線の吸収率と、前記個々の塗型構成物の質量パーセントとから求められるものであり、且つ、求められた吸収効率に基づき前記の配合する物質とその配合率を決定することを特徴とする水性塗型剤の製造方法。 For each coating composition constituting the aqueous coating agent, the infrared absorption spectrum of the absorption rate for wavelengths including 3 μm to 10 μm is measured, and the infrared emissivity at the wavelength emitted from the infrared dryer is measured, The absorption efficiency is obtained during the amount measurement results , thereby determining the coating composition to be blended and its blending ratio, and blending each coating composition constituting the aqueous coating agent based on this blending ratio. Yes,
The absorption efficiency is obtained from the infrared emissivity of the measurement result, the infrared absorption rate of the individual coating composition of the measurement result, and the mass percentage of the individual coating composition, and The method for producing an aqueous coating agent, wherein the substance to be blended and the blending ratio thereof are determined based on the obtained absorption efficiency .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001169265A JP4817136B2 (en) | 2001-06-05 | 2001-06-05 | Method for producing water-based coating agent for infrared dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001169265A JP4817136B2 (en) | 2001-06-05 | 2001-06-05 | Method for producing water-based coating agent for infrared dryer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002361363A JP2002361363A (en) | 2002-12-17 |
| JP4817136B2 true JP4817136B2 (en) | 2011-11-16 |
Family
ID=19011365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001169265A Expired - Fee Related JP4817136B2 (en) | 2001-06-05 | 2001-06-05 | Method for producing water-based coating agent for infrared dryer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4817136B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439200A (en) * | 2014-11-24 | 2015-03-25 | 上海纵化实业有限公司 | Exothermic heat-insulating covering agent used for casting steel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5337526A (en) * | 1976-09-21 | 1978-04-06 | Komatsu Mfg Co Ltd | Surface treatment method for steel casting mould |
| JPS6146350A (en) * | 1984-08-11 | 1986-03-06 | Jidosha Imono Kk | Production of casting mold |
-
2001
- 2001-06-05 JP JP2001169265A patent/JP4817136B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002361363A (en) | 2002-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11529673B2 (en) | Coating composition for the foundry industry, containing particulate, amorphous silicon dioxide and acid | |
| JP5422196B2 (en) | Disappearance model coating composition and disappearance model casting method | |
| KR102432071B1 (en) | Coating composition comprising organic ester compound and particulate, amorphous silicon dioxide for use in the foundry industry | |
| CN103857480A (en) | Cladding compound for inorganic casting molds and cores comprising methyl formate and use thereof | |
| JP2014534074A (en) | Coating composition for inorganic template and core containing salt and method of use thereof | |
| JP4817136B2 (en) | Method for producing water-based coating agent for infrared dryer | |
| KR102431208B1 (en) | Use of coating compositions containing acids in the foundry industry | |
| TW201623469A (en) | Coating agent composition for evaporative pattern | |
| US3436235A (en) | Colloidal silica compositions containing set indicator | |
| US6949136B2 (en) | High temperature investment material and method for making solid investment molds | |
| JPH0223497B2 (en) | ||
| JP2011031274A (en) | Coating agent composition for sand mold | |
| CN105517727B (en) | Mold coating agent composition for lost foam | |
| US6746528B1 (en) | High temperature investment material and method for making solid investment molds | |
| JP3784677B2 (en) | Casting composition | |
| JP4421466B2 (en) | Slurry for casting mold and mold obtained using the same | |
| IL36333A (en) | Refractory compositions | |
| JPH04147744A (en) | Facing agent composition | |
| JP6823430B2 (en) | Oil-based mold release composition for sand molds | |
| JP2022022478A (en) | Water glass-coated sand | |
| JP2022001384A (en) | Inorganic binder-coated sand | |
| NO131884B (en) | ||
| BR112019013763B1 (en) | COATING COMPOSITION, USE OF A COATING COMPOSITION, PROCESS FOR PRODUCING A SODIUM SILICATE BOUNDED MOLD COATED WITH A WATER CONTAINING REFRACTORY COATING OR A SODIUM SILICATE BOUNDED MOLDER COATED WITH A WATER CONTAINING REFRACTORY COATING, SODIUM SILICATE BOUNDED MOLD COATED OR MALE BOUNDED WITH SODIUM SILICATE, COATED FORM OR COATED MALE AND KIT | |
| JP2004298939A (en) | Exothermic facing agent | |
| GB895220A (en) | A process of making refractory shells for casting metal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A712 Effective date: 20040709 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080512 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080618 |
|
| RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20080618 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20080618 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20110419 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20110616 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20110707 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20110726 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20110822 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140909 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 4817136 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |