JPH04105747A - Additive for forming sand mold for casting and manufacture of sand mold for casting - Google Patents
Additive for forming sand mold for casting and manufacture of sand mold for castingInfo
- Publication number
- JPH04105747A JPH04105747A JP22219290A JP22219290A JPH04105747A JP H04105747 A JPH04105747 A JP H04105747A JP 22219290 A JP22219290 A JP 22219290A JP 22219290 A JP22219290 A JP 22219290A JP H04105747 A JPH04105747 A JP H04105747A
- Authority
- JP
- Japan
- Prior art keywords
- oxide
- sand mold
- casting
- additive
- mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004576 sand Substances 0.000 title claims abstract description 37
- 239000000654 additive Substances 0.000 title claims abstract description 10
- 230000000996 additive effect Effects 0.000 title claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000005266 casting Methods 0.000 title abstract description 7
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 10
- 150000004706 metal oxides Chemical class 0.000 claims description 25
- 239000002245 particle Substances 0.000 claims description 21
- 239000011230 binding agent Substances 0.000 claims description 12
- 230000002378 acidificating effect Effects 0.000 abstract description 11
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 abstract description 10
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 abstract description 6
- 239000005751 Copper oxide Substances 0.000 abstract description 5
- 229910000431 copper oxide Inorganic materials 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 abstract description 3
- 229910001930 tungsten oxide Inorganic materials 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 2
- 230000003111 delayed effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 24
- 239000003795 chemical substances by application Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000007849 furan resin Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- QFFUJMYTIBZKQL-UHFFFAOYSA-N formaldehyde;furan-2-ylmethanol;urea Chemical compound O=C.NC(N)=O.OCC1=CC=CO1 QFFUJMYTIBZKQL-UHFFFAOYSA-N 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 2
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- JIRHAGAOHOYLNO-UHFFFAOYSA-N (3-cyclopentyloxy-4-methoxyphenyl)methanol Chemical compound COC1=CC=C(CO)C=C1OC1CCCC1 JIRHAGAOHOYLNO-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は注湯時に発生するＳＯ□ガス等の酸性ガス量を
低減できる鋳物用砂型形成用添加剤及び鋳物用砂型の製
造法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an additive for forming a foundry sand mold and a method for manufacturing a foundry sand mold, which can reduce the amount of acidic gas such as SO□ gas generated during pouring.
従来、鋳物工業界では、鋳物砂の資源の問題から鋳物砂
を回収、再生、再使用する必要性、及び産業廃棄物の廃
棄量を減少せしめる目的を満たすため無機鋳型から有機
自硬性鋳型への転換が進んできた。かかる転換は資源問
題、産業廃棄物問題を解決するだけでなく、労働条件の
緩和、熟練工不足問題の緩和をもたらし、さらに鋳物の
品質を向上せしめ、生産性向上に著しく大きな役割を果
たしてきた。Traditionally, in the foundry industry, there has been a shift from inorganic molds to organic self-hardening molds in order to meet the need to recover, recycle, and reuse foundry sand due to problems with foundry sand resources, and to reduce the amount of industrial waste. The transformation has progressed. This conversion not only solved resource and industrial waste problems, but also eased working conditions and the problem of a shortage of skilled workers. Furthermore, it improved the quality of castings and played a significant role in increasing productivity.
有機自硬性鋳型を製造するために用いられる粘結剤は有
機粘結剤であり、周知の如く酸硬化性粘結剤が最も多く
使用されている。酸硬化性粘結剤としては、たとえば尿
素−ホルムアルデヒド−フルフリルアルコール系樹脂、
フェノール−ホルムアルデヒド−フルフリルアルコール
系樹脂、フェノール−ホルムアルデヒド系樹脂、ホルム
アルデヒド−フルフリルアルコール系樹脂、尿素−フエ
ノール−ホルムアルデヒド−フルフリルアルコール系樹
脂等が主として用いられている。The binder used to produce organic self-hardening molds is an organic binder, and as is well known, acid-curing binders are most commonly used. Examples of acid-curable binders include urea-formaldehyde-furfuryl alcohol resin,
Mainly used are phenol-formaldehyde-furfuryl alcohol resin, phenol-formaldehyde resin, formaldehyde-furfuryl alcohol resin, urea-phenol-formaldehyde-furfuryl alcohol resin, and the like.
有機自硬性鋳型は上述の如く諸々の優れた性能を具備し
、当業界の諸要請に応じるものであるが故に広く利用さ
れるに到っているが、それにもかかわらず尚、鋳物の工
場生産にあたって解決すべき問題点が残されている。そ
の問題点とは酸性ガスの発生による作業環境の汚染の可
能性である。即ち、鋳物砂の再生再使用の効率を向上せ
しめるために有機粘結剤の硬化剤としてはリン酸系、ス
ルホン酸系等の酸のうちスルホン酸が多用されるが、硬
化剤にスルホン酸を用いて製造された有機自硬性鋳型は
鋳込とに溶媒と接触したスルホン酸が分解し、ＳＯ２ガ
ス、並びにＳＯ３ガス等の酸性ガスを発生せしめること
となる。そこで工場作業環境に及ぼす影響について懸念
されるが、この懸念に対しては一般的な換気手段を用い
てもある程度の防止は可能であり、事実、環境測定時の
多くのデータから工場全体としての環境がＴＬＶ以下、
即ちＳ０２ガス濃度が５ ｐｐｍ以下に保たれている場
合がほとんどである。しかるに鋳込直後の鋳型の真上又
は掻く近傍では、換気状態にもよるが、ＳＯ□ガス濃度
が高く、その臭気による不快感が避けられない。かかる
不都合に対し当業界では、硬化剤であるスルホン酸の使
用量を減少せしめ、そのための砂の管理又はマスクの着
用、換気、通気手段の改良等の諸々の対策が講じられて
いる。As mentioned above, organic self-hardening molds have various excellent properties and have come to be widely used because they meet the various demands of the industry. There are still issues that need to be resolved. The problem is the possibility of contaminating the working environment due to the generation of acid gas. That is, in order to improve the efficiency of recycling and reusing foundry sand, sulfonic acid is often used as a hardening agent for organic binders, including acids such as phosphoric acid and sulfonic acid. In the organic self-hardening mold produced using this method, the sulfonic acid that comes into contact with the solvent during casting decomposes and generates acidic gases such as SO2 gas and SO3 gas. Therefore, there are concerns about the impact it will have on the factory working environment, but this concern can be prevented to some extent by using general ventilation methods, and in fact, based on a lot of data from environmental measurements, it is possible to If the environment is below TLV,
That is, in most cases, the S02 gas concentration is maintained at 5 ppm or less. However, immediately above the mold or in the vicinity of the mold immediately after casting, the concentration of SO□ gas is high, depending on the ventilation conditions, and discomfort due to its odor is unavoidable. In response to these inconveniences, the industry has taken various measures to reduce the amount of sulfonic acid used as a hardening agent, such as controlling sand, wearing masks, and improving ventilation and ventilation means.
本発明者らはかかる当業界における問題点を解決すべく
、上述のいわば物理的対策の検討と共に、フラン樹脂が
主流を占めている酸硬化粘結剤の有する重要なメリント
を生かしながら作業環境の改善を可能にするべく化学的
対策の探索をしてきた。その結果水酸化ナトリウム、炭
酸ナトリウム、酸化マグネシウム、炭酸カルシウム、酸
化カルシウム等のアルカリもしくはアルカリ土類金属の
酸化物、炭酸塩、水酸化物等の粉末に、硬化剤としてス
ルホン酸を用い酸硬化性粘結剤として尿素−ホルムアル
デヒド−フルフリルアルコール系のフラン樹脂を砂と共
に硬化せしめて成型した鋳型から発生した分解ガスを吸
収させたところ、良い固−気接触中和が行なわれ、酸性
ガスである分解ガスがきわめて有効に捕捉されることが
わかった。しかし、これらの金属酸化物等は微細な粉体
であることから鋳型の砂中に混入したときは砂の回収、
再生の際分離が困難であり、分離せずに放置すれば残存
する金属酸化物等は次の再生砂再使用における鋳型の製
造時に酸硬化性有機粘結剤の酸による硬化の阻害を生せ
しめることになる。In order to solve these problems in the industry, the present inventors have studied the physical measures mentioned above, and have taken advantage of the important advantages of acid-curing binders, of which furan resins are the mainstream, to improve the work environment. We have been searching for chemical countermeasures to make improvements possible. As a result, sulfonic acid is used as a hardening agent to acid-cure powders of alkali or alkaline earth metal oxides, carbonates, and hydroxides such as sodium hydroxide, sodium carbonate, magnesium oxide, calcium carbonate, and calcium oxide. When a urea-formaldehyde-furfuryl alcohol-based furan resin was used as a binder and hardened with sand to absorb the decomposed gas generated from the mold, good solid-gas contact neutralization occurred, resulting in acidic gas. It was found that decomposed gases were captured very effectively. However, since these metal oxides are fine powders, if they are mixed into the sand of the mold, the sand must be recovered,
It is difficult to separate during recycling, and if left unseparated, the remaining metal oxides will inhibit the curing of the acid-curable organic binder by acid when manufacturing molds for the next reuse of recycled sand. It turns out.
また、金属酸化物を酸硬化性粘結剤と一緒に添加して硬
化剤であるスルホン酸で硬化させようとしても硬化速度
が遅くなり、実用的でない。Further, even if it is attempted to add a metal oxide together with an acid-curable binder and cure it with sulfonic acid, which is a curing agent, the curing speed becomes slow and is not practical.
更に本発明者らはこの問題を解決すべく鋳物用砂型から
発生したＳＯ２ガス等の酸性ガスを捕捉する方法として
水硬性アルカリ性物質を発泡体に成形した物を酸性ガス
捕捉材として用いることを提案した（特開昭５６−１５
８２４９号公報）。Furthermore, in order to solve this problem, the present inventors have proposed using a hydraulic alkaline material molded into a foam as an acidic gas trapping material as a method of trapping acidic gases such as SO2 gas generated from foundry sand molds. (Unexamined Japanese Patent Publication No. 56-15
Publication No. 8249).
しかしながら、この方法には、発泡体がかさ高いこと、
発泡体を鋳型上に置いたり排ガスフードの開口面に置い
たりして使用するのに手間がかかること、酸性ガス捕捉
能に寿命があり、定期的な取替が必要であること等の欠
点がある。However, this method suffers from the fact that the foam is bulky;
Disadvantages include that it takes time and effort to place the foam on a mold or on the opening surface of an exhaust gas hood, and that its ability to capture acidic gases has a limited lifespan and requires periodic replacement. be.
鋳型造型時に添加剤を使用することで、硬化速度を遅く
することなく、注湯時に発生するＳ０２ガス等の酸性ガ
ス量を低減できれば、この方法は簡便な方法であり、実
施しやすい。This method is simple and easy to implement if the amount of acidic gases such as S02 gas generated during pouring can be reduced by using additives during mold making without slowing down the curing speed.
従って本発明の目的はそのような添加剤を提供すること
にある。It is therefore an object of the present invention to provide such an additive.
本発明者らは上記の課題を解決すべ（鋭意研究した結果
、特定の粒度を有する金属酸化物を用いれば硬化阻害を
引き起こすことなく鋳物用砂型を製造でき、かつ注湯時
に発生するＳＯ２ガス等の酸性ガス量を低減できること
を見出し、本発明を完成するに至った。The inventors of the present invention have solved the above problems (as a result of intensive research, it has been found that if a metal oxide with a specific particle size is used, a foundry sand mold can be manufactured without causing hardening inhibition, and the SO2 gas generated during pouring can be The present inventors have discovered that the amount of acidic gas can be reduced, and have completed the present invention.
すなわち本発明は、平均粒径が１１０−１Ｏ０ｔ、且つ
粒径が５−以下のものの含有量が５％未満である金属酸
化物よりなる鋳物用砂型形成用添加剤及び酸硬化性有機
粘結剤を用いて鋳物用砂型を製造する際に、上記の鋳物
用砂型形成用添加剤を添加することを特徴とする鋳物用
砂型の製造法を提供するものである。That is, the present invention provides a foundry sand mold forming additive and an acid-curable organic binder comprising a metal oxide having an average particle size of 110-100t and a content of less than 5% of particles having a particle size of 5- or less. The present invention provides a method for manufacturing a foundry sand mold, characterized in that the above additive for forming a foundry sand mold is added when manufacturing the foundry sand mold using the method.
本発明に用いられる金属酸化物としては酸化銅、酸化マ
ンガン、酸化モリブデン、酸化タングステン、酸化コバ
ルト、酸化鉄、酸化チタン、酸化ニッケル等が挙げられ
、好ましくは酸化銅、酸化マンガン、酸化モリブデン、
酸化タングステンであり、特に好ましくは酸化銅、酸化
マンガンである。これらの金属酸化物は複合物であって
もよく、１種又は２種以上を単独で或いは配合して用い
てもよい。また、金属酸化物としては第−又或いは第二
酸化物のいずれを用いることもできる。Examples of the metal oxide used in the present invention include copper oxide, manganese oxide, molybdenum oxide, tungsten oxide, cobalt oxide, iron oxide, titanium oxide, nickel oxide, etc., and preferably copper oxide, manganese oxide, molybdenum oxide,
Tungsten oxide, particularly preferably copper oxide or manganese oxide. These metal oxides may be composites, and may be used alone or in combination of two or more. Further, as the metal oxide, either a primary oxide or a secondary oxide can be used.
金属酸化物中しては、平均粒径が１０〜１００Ｉ！ｍ、
且つ粒径が５−以下の金属酸化物が５％未満であるもの
が用いられる。金属酸化物の平均粒径が１０１ｍ未満で
は硬化阻害が大きく、また、平均粒径が１００ ｔｔｔ
ｍを越えるとＳＯ２ガス等の酸性ガスの低減が低下する
。また、粒径が５−以下の金属酸化物の量が５％以上に
なると、極度に硬化阻害を起こす。Among metal oxides, the average particle size is 10 to 100 I! m,
In addition, a material containing less than 5% of metal oxides having a particle size of 5 or less is used. If the average particle size of the metal oxide is less than 101 m, curing inhibition will be large;
If it exceeds m, the reduction of acidic gases such as SO2 gas will be reduced. Furthermore, if the amount of metal oxides with a particle size of 5 or less exceeds 5%, hardening will be extremely inhibited.
本発明の鋳物用砂型の製造法に用いられる酸硬化型有機
粘結剤、鋳物川砂、硬化剤等としては通常この分野で用
いられているものが使用でき、特に限定されない。本発
明の金属酸化物を用いて鋳型を製造する際には、金属酸
化物は鋳物川砂１００重量部に対して０．０１〜５重量
部、好ましくは０．０５〜１．０重量部添加される。ま
た、金属酸化物の添加は、前もって鋳型川砂中に添加し
ても、樹脂中に添加してもよく、また、砂型製造時に別
添加してもよい。ただし、砂型製造前に金属酸化物と硬
化剤（酸）が共存することは好ましくない。The acid-curing organic binder, foundry river sand, hardening agent, etc. used in the method for producing a foundry sand mold of the present invention are not particularly limited, and those commonly used in this field can be used. When manufacturing a mold using the metal oxide of the present invention, the metal oxide is added in an amount of 0.01 to 5 parts by weight, preferably 0.05 to 1.0 parts by weight, per 100 parts by weight of foundry river sand. Ru. Further, the metal oxide may be added in advance to the molding river sand, added to the resin, or added separately at the time of manufacturing the sand mold. However, it is not preferable for the metal oxide and the hardening agent (acid) to coexist before manufacturing the sand mold.
以下実施例にて本発明を説明するが、本発明はこれらの
実施例に限定されるものではない。The present invention will be explained below with reference to Examples, but the present invention is not limited to these Examples.
実施例１〜４及び比較例１〜３ 鋳物用砂型を以下の材料を用いて製造した。Examples 1 to 4 and Comparative Examples 1 to 3 A foundry sand mold was manufactured using the following materials.
使朋林料
鋳物砂・・・フリーマントル砂
樹 脂・・・カオーライトナー３４ＱＡ （花王りエ
ーカー■製）１．０％（対砂重量）
硬化剤・・・カオーライトナーＴＫ−３（花王りエーカ
ー■製）４０％（対砂重量）
金属酸化物・・・表−１参照。Forestry foundry sand: Freemantle sand Resin: Kaolite Toner 34QA (manufactured by Kao Riacre) 1.0% (weight of sand) Hardening agent: Kaolite Toner TK-3 (Kao Riacre) (manufactured by ■) 40% (weight of sand) Metal oxides...See Table-1.
上記の鋳物砂１００重量部に対し、６０％−キシレンス
ルホン酸水溶液０．４重量部、表−１に示す量の金属酸
化物及び尿素変性フラン樹脂１．０重量部を添加して２
分間攪拌し、鋳型を製作した。この鋳型を用いて造型し
た鋳物用砂型の鋳型強度を、５０φＸ５０ｍａ＋のテス
トピースを作成し、＋ＧＦ十型強度試験機により圧縮強
度を測定した。To 100 parts by weight of the above foundry sand, 0.4 parts by weight of a 60% xylene sulfonic acid aqueous solution, 1.0 parts by weight of the metal oxide in the amounts shown in Table 1, and urea-modified furan resin were added.
The mixture was stirred for a minute and a mold was made. A test piece of 50φ x 50ma+ was prepared to measure the compressive strength of a foundry sand mold made using this mold using a +GF ten-shaped strength testing machine.
これらの結果を表−１に示す。These results are shown in Table-1.
比較例４
実施例１〜４で用いた金属酸化物の代わりにＫＯＨを用
いて実施例１〜４と同様の試験を行なった。尚、ＫＯＨ
は乳バチですりつぶし、呼び寸法１０５．ｍと５３−の
ＪＩＳふるいを用い、ＪＩＳ Ｚ２６０２（１９７６年
）の方法でふるい分け、５３−のふるい上のＫＯＨを使
用した。Comparative Example 4 A test similar to Examples 1 to 4 was conducted using KOH instead of the metal oxide used in Examples 1 to 4. In addition, KOH
is ground with a milk drum, nominal size 105. The KOH on the 53-m and 53-m sieves was used.
その結果を表−１に示す。The results are shown in Table-1.
比較例５．６
金属酸化物として平均粒径が５−以下ものの含有量が１
８．５％のＣｕＯを表−１に示す量用い、実施例１〜４
と同様の試験を行なった。Comparative Example 5.6 The content of metal oxides with an average particle size of 5- or less is 1
Examples 1 to 4 using 8.5% CuO in the amount shown in Table 1
A similar test was conducted.
その結果を表−１に示す。The results are shown in Table-1.
尚、上記の実施例及び比較例で用いた金属酸化物の粒度
分布を図１〜５に示した。粒度分布の測定はレーザ回折
式粒度分布測定装置ＬＡ−５００（■堀場製作所製）を
用いて行なった。ただしＫＯＨの粒度分布の測定はＬＡ
−５００では溶けてしまい、測定できないので粉砕後ふ
るい分けを行なった。In addition, the particle size distribution of the metal oxide used in the above-mentioned Examples and Comparative Examples is shown in FIGS. 1 to 5. The particle size distribution was measured using a laser diffraction particle size distribution analyzer LA-500 (manufactured by Horiba, Ltd.). However, the measurement of the particle size distribution of KOH is LA.
-500 melts and cannot be measured, so it was sieved after crushing.
また、実施例１及び２で用いた金属酸化物中の粒径が５
−以下の粒子の含有量は０．４重量％、同じ〈実施例３
及び４で用いた金属酸化物中の粒径が５−以下の粒子の
含有量は０．０重量％であった。Furthermore, the particle size of the metal oxide used in Examples 1 and 2 was 5
- The content of the following particles is 0.4% by weight, the same <Example 3
The content of particles having a particle size of 5 or less in the metal oxide used in Example 4 and Example 4 was 0.0% by weight.
表
ＳＯ□濃度を測定した。尚、ＳＯ□ガス濃度の測定は北
側式カス検知管を使用して行なった。Table SO□ concentration was measured. Note that the SO□ gas concentration was measured using a north type scum detection tube.
肪ユム条立
材 質・・・Ｆｅ１２−２５相当２２に、；温 度・・
１３８０〜１４２０°Ｃ
結果を表−２に示す。Fat yum row standing timber Quality... Fe12-25 equivalent to 22; Temperature...
1380-1420°C The results are shown in Table-2.
表 −２
実施例５
実施例１〜４及び比較例１で得られた鋳型に約１４００
°Ｃの溶湯（ＦＣ２０〜２５相当）を注入して、直ちに
上部中央に１０ｃｍＸ１０ｃｍの穴の開いた６０ｃｍＸ
６０ｃｍ Ｘ ６０ｃｍの大きさの枠をかぶせ、経時
的にTable 2 Example 5 Approximately 1400
Inject the molten metal (equivalent to FC20-25) at °C and immediately make a 60cmX
Cover with a frame of 60cm x 60cm, and over time
図１は実施例１．２で、図２は実施例３で、図３は比較
例２で、図４は比較例３で、図５は比較例５，６で用い
た金属酸化物の粒度分布を示すグラフである。
図Figure 1 is Example 1.2, Figure 2 is Example 3, Figure 3 is Comparative Example 2, Figure 4 is Comparative Example 3, and Figure 5 is the particle size of metal oxide used in Comparative Examples 5 and 6. It is a graph showing distribution. figure
Claims (1)
下のものの含有量が５％未満である金属酸化物よりなる
鋳物用砂型形成用添加剤。 ２ 酸硬化性有機粘結剤を用いて鋳物用砂型を製造する
際に、請求項１記載の鋳物用砂型形成用添加剤を添加す
ることを特徴とする鋳物用砂型の製造法。[Scope of Claims] 1. An additive for forming sand molds for foundries, comprising a metal oxide having an average particle size of 10 to 100 μm and a content of less than 5% of particles with a particle size of 5 μm or less. 2. A method for manufacturing a foundry sand mold, which comprises adding the additive for forming a foundry sand mold according to claim 1 when manufacturing a foundry sand mold using an acid-curable organic binder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22219290A JP2892461B2 (en) | 1990-08-23 | 1990-08-23 | Additive for forming sand mold for casting and method for producing sand mold for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22219290A JP2892461B2 (en) | 1990-08-23 | 1990-08-23 | Additive for forming sand mold for casting and method for producing sand mold for casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04105747A true JPH04105747A (en) | 1992-04-07 |
| JP2892461B2 JP2892461B2 (en) | 1999-05-17 |
Family
ID=16778595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22219290A Expired - Fee Related JP2892461B2 (en) | 1990-08-23 | 1990-08-23 | Additive for forming sand mold for casting and method for producing sand mold for casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2892461B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003010944A (en) * | 2001-06-28 | 2003-01-15 | Asahi Organic Chem Ind Co Ltd | Organic composition for foaming fluid self-strengthening mold |
| JP2014128823A (en) * | 2012-12-28 | 2014-07-10 | Kao Corp | Method of making mold |
-
1990
- 1990-08-23 JP JP22219290A patent/JP2892461B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003010944A (en) * | 2001-06-28 | 2003-01-15 | Asahi Organic Chem Ind Co Ltd | Organic composition for foaming fluid self-strengthening mold |
| JP2014128823A (en) * | 2012-12-28 | 2014-07-10 | Kao Corp | Method of making mold |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2892461B2 (en) | 1999-05-17 |
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