JPS6044147A - Production of molding sand - Google Patents
Production of molding sandInfo
- Publication number
- JPS6044147A JPS6044147A JP15186983A JP15186983A JPS6044147A JP S6044147 A JPS6044147 A JP S6044147A JP 15186983 A JP15186983 A JP 15186983A JP 15186983 A JP15186983 A JP 15186983A JP S6044147 A JPS6044147 A JP S6044147A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- aqueous solution
- added
- sand
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000003110 molding sand Substances 0.000 title abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000004576 sand Substances 0.000 claims abstract description 37
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 21
- 150000001720 carbohydrates Chemical class 0.000 claims abstract description 20
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 15
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 9
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 9
- 150000003839 salts Chemical class 0.000 claims abstract description 9
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004202 carbamide Substances 0.000 claims abstract description 8
- 238000004898 kneading Methods 0.000 claims abstract description 6
- 150000003863 ammonium salts Chemical class 0.000 claims abstract description 5
- 239000007864 aqueous solution Substances 0.000 claims description 25
- 239000007809 chemical reaction catalyst Substances 0.000 claims description 16
- 150000007522 mineralic acids Chemical class 0.000 claims description 5
- 150000007524 organic acids Chemical class 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 235000005985 organic acids Nutrition 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 8
- 229920001353 Dextrin Polymers 0.000 abstract description 4
- 239000004375 Dextrin Substances 0.000 abstract description 4
- 235000019425 dextrin Nutrition 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 3
- 239000003054 catalyst Substances 0.000 abstract description 3
- OWEGMIWEEQEYGQ-UHFFFAOYSA-N 100676-05-9 Natural products OC1C(O)C(O)C(CO)OC1OCC1C(O)C(O)C(O)C(OC2C(OC(O)C(O)C2O)CO)O1 OWEGMIWEEQEYGQ-UHFFFAOYSA-N 0.000 abstract description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 abstract description 2
- GUBGYTABKSRVRQ-PICCSMPSSA-N Maltose Natural products O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@@H](CO)OC(O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-PICCSMPSSA-N 0.000 abstract description 2
- 229920002472 Starch Polymers 0.000 abstract description 2
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 abstract description 2
- 229930006000 Sucrose Natural products 0.000 abstract description 2
- -1 amine salt Chemical class 0.000 abstract description 2
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 abstract description 2
- GUBGYTABKSRVRQ-QUYVBRFLSA-N beta-maltose Chemical compound OC[C@H]1O[C@H](O[C@H]2[C@H](O)[C@@H](O)[C@H](O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@@H]1O GUBGYTABKSRVRQ-QUYVBRFLSA-N 0.000 abstract description 2
- 239000008103 glucose Substances 0.000 abstract description 2
- 239000008107 starch Substances 0.000 abstract description 2
- 235000019698 starch Nutrition 0.000 abstract description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical class OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract 4
- 239000004552 water soluble powder Substances 0.000 abstract 2
- 229960004793 sucrose Drugs 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 239000011230 binding agent Substances 0.000 description 9
- 238000004090 dissolution Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 235000000346 sugar Nutrition 0.000 description 4
- 150000008163 sugars Chemical class 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 1
- MBHRHUJRKGNOKX-UHFFFAOYSA-N [(4,6-diamino-1,3,5-triazin-2-yl)amino]methanol Chemical compound NC1=NC(N)=NC(NCO)=N1 MBHRHUJRKGNOKX-UHFFFAOYSA-N 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 150000007974 melamines Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
- B22C1/26—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of carbohydrates; of distillation residues therefrom
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は鋳造用型に型込め後そのまま放置するか加熱す
ることにより鋳型を容易に造型することができる鋳物砂
の製造方法に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for producing foundry sand that can be easily molded into molds by placing it in a casting mold and then leaving it as it is or heating it. .
（従来技術）
珪砂に鋳型用粘結剤を添加、混練してｆ！Ｑ造型に型込
めし、そのまま放置するか加熱することにより鋳型を造
型する鋳型の造型法は種々知られているが、鋳型用粘結
剤の種類によって公害上の問題が生じたり、注湯後の砂
落しが困難となったり、鋳物廃砂の後処理の問題があり
、その改善が強く要望されている。そこで、本出願人は
先に特願昭！；７−／！；９３７３号として糖類と、尿
素またはメラミンのメチロール化物或いはアルキル化メ
チロール化物から選ばれた水溶性の架橋剤と、有機酸、
無機酸或いはこれらの金属塩、アンモニウム塩、アルカ
ノールアミン塩から選ばれた架橋剤の反応用触媒とを必
須成分として含有する鋳型用粘結剤を出願したが、この
鋳型用粘結剤を用いて鋳物砂をつくる場合の粘結剤添加
方法としては水溶性糖類、架橋剤及び反応用触媒を含む
水溶液を用意してこれを珪砂に添加する方法や珪砂に水
を添加しておきこれに水溶性糖類、加橋剤及び反応用触
媒の水溶液を別々に添加する方法或いは水溶性糖類と架
橋剤を含む水溶液と反応用触媒の水溶液を分けて添加す
る方法などが考えられる。しかしながらこれらの方法で
は水溶性糖類をいずれも水に溶解する必要があるため、
溶解に時間がかかるとともに水溶液濃度の増大に伴なっ
て高粘度化して取扱いが厄介になり、また、溶解に限界
があるため低含水率の鋳物砂ができないこと芒らには得
られた水溶液の可使時間が短・かいことなどの問題があ
った。(Prior art) A molding binder is added to silica sand, kneaded, and f! Q: There are various mold making methods known, in which the mold is poured into a mold and left as is or heated, but depending on the type of mold binder used, pollution problems may arise, There are problems such as difficulty in removing sand and post-treatment of foundry waste sand, and improvements to these problems are strongly desired. Therefore, the present applicant first filed a patent application! ;7-/! No. 9373, a saccharide, a water-soluble crosslinking agent selected from methylolated products or alkylated methylolated products of urea or melamine, and an organic acid;
An application was filed for a molding binder containing as an essential component a catalyst for the reaction of a crosslinking agent selected from inorganic acids or their metal salts, ammonium salts, and alkanolamine salts. When making foundry sand, methods for adding a binder include preparing an aqueous solution containing water-soluble saccharides, crosslinking agents, and reaction catalysts and adding this to silica sand, or adding water to silica sand and adding a water-soluble Possible methods include a method in which an aqueous solution of a saccharide, a crosslinking agent, and a reaction catalyst are added separately, or a method in which an aqueous solution containing a water-soluble saccharide and a crosslinking agent and an aqueous solution of a reaction catalyst are added separately. However, these methods require all water-soluble sugars to be dissolved in water.
Dissolution takes time, and as the concentration of the aqueous solution increases, the viscosity increases, making it difficult to handle.Furthermore, due to the limitations of dissolution, foundry sand with a low moisture content cannot be produced. There were problems such as short pot life and curing.
（発明の目的）
本発明はこれらの問題点を解決する目的の下に完成され
た鋳物砂の製造方法に関するものである（発明の構成）
本発明は珪砂に粉末状の水溶性糖類を添加、混合してこ
れに尿素またはメラミンのメチロール化物或いは尿素ま
たはメラミンのアルキル化メチロール化物から選ばれた
架橋剤の水溶液と有機酸、無機酸或いはこれらの金属塩
、アンモニウム塩、アルカノールアミン塩から選ばれた
反応用触媒の水溶液とを添加、混練することを特徴とす
るものである。(Object of the invention) The present invention relates to a method for producing foundry sand completed with the aim of solving these problems. (Structure of the invention) The present invention involves adding powdered water-soluble saccharides to silica sand, Mix this with an aqueous solution of a crosslinking agent selected from methylolated products of urea or melamine, or alkylated methylolated products of urea or melamine, and organic acids, inorganic acids, or metal salts, ammonium salts, and alkanolamine salts thereof. This method is characterized by adding and kneading an aqueous solution of a reaction catalyst.
本発明において先ず珪砂に添加、混合される水溶性糖類
としては、可溶性澱粉、デキストリン、ショ糖、マルト
ース、グルコースなどの粉末状の水溶性の糖類であれば
いかなるものでもよい。まり、架橋剤としてはメチロー
ルメラミン、メチル化メチロ−μメラミン、メチル化メ
チロ−／’ 尿Ｗ＜など水溶性糖類の水酸基との化学反
応性の主ある尿素またはメラミンのメチロール化物或い
は尿素またはメラミンのアルキル化メチロール化物から
選ばれる。さらに、反応用触媒としては酒石酸、リンコ
市、マレイン１、パラトルエンスμホン酸などの有機酸
、硫酸、塩酸などの無機酸、塩化亜＆４、塩化アンモニ
ウム、２−アミノ−ノーメチルプロパノール塩酸塩など
の有機酸または無機酸の金属塩、アンモニウム塩、アル
カノールアミン塩から選ばれる０また、ｎ１１記架橋剤
の添加量は特に限定きれることはないが、例λ−は珪砂
１００重量部に対して水溶性糖類１重ｈ１部を添加した
場合で０３重量部以下、０００７重量部以上好ましくは
０７重量部以下、θ０７重ζ）部具上が適当である。そ
の理由は架橋剤の添加量が０００／重栖部〜０３重量部
の範囲を越えると耐湿性が悪くなるとともに強度か弱く
なる傾向があるからである。一方、反応触媒の添加量は
前記の場合で０１５重量部以下、０．０００ ／重量部
以上、好ましくは００５重量部以下、０００７重量部以
上が適当である。In the present invention, the water-soluble saccharide that is first added and mixed with silica sand may be any powdered water-soluble saccharide such as soluble starch, dextrin, sucrose, maltose, and glucose. Examples of crosslinking agents include methylolmelamine, methylated methylo-μmelamine, methylated methylo-/'urine W<, methylolated products of urea or melamine, or methylolated products of urea or melamine, which are mainly chemically reactive with the hydroxyl groups of water-soluble sugars. selected from alkylated methylolated products. In addition, reaction catalysts include organic acids such as tartaric acid, Rinco City, maleic acid, para-toluene μphonic acid, inorganic acids such as sulfuric acid and hydrochloric acid, subchloride chloride, ammonium chloride, and 2-amino-nomethylpropanol hydrochloride. 0 selected from metal salts, ammonium salts, and alkanolamine salts of organic acids or inorganic acids.Although the amount of the crosslinking agent described in n11 is not particularly limited, example λ- is water-soluble with respect to 100 parts by weight of silica sand. When 1 part by weight of saccharide is added, 03 parts by weight or less, 0007 parts by weight or more, preferably 07 parts by weight or less, θ07 parts by weight or less are suitable. The reason for this is that if the amount of the crosslinking agent added exceeds the range of 000 parts by weight to 03 parts by weight, the moisture resistance tends to deteriorate and the strength tends to decrease. On the other hand, the amount of the reaction catalyst to be added is suitably 0.15 parts by weight or less and 0.000 parts by weight or more, preferably 0.005 parts by weight or more and 0.007 parts by weight or more.
その理由は０１５重量部を越えると反応が早すぎ（１）
、 ｏ ｏ Ｏ／重量部を下回ると反応が遅すぎる。ま
た、前記水溶性糖類の添加量は珪砂７００重量部に対し
て０． ／重量部〜５重敬部が好ましい。これは５重量
部を越えると経済性、崩壊性に問題があり０７重量部を
下回ると強度が弱くなるからである。また、鋳物砂の水
分量は粘結剤７．０重量部に対して０５重量部〜２５重
量部、好ましくはａｇ重量部〜乙２重量部の範囲が適当
であって、ａＳ重爪部を下回ると型込め時におりる砂粒
千間の粘着力が損われる傾向があり、強度低下や鋳型変
形を引き起す恐れがある。しかして、珪砂に粉末状の水
溶性糖類を添加混合後に前記架橋剤の水溶液と前記反応
用触媒の水溶液とを添加、混練すると水溶性糖類の水酸
基と架橋剤のメチロール基などとが少量の水及び反応用
触媒の存在のもとて速やかに化学結合して水溶性から水
不溶性へ変化するため、本発明方法によって得られる鋳
物砂は長時間多湿下で放置しても吸湿せず、硬性状が変
化することはない。また、本発明によれば珪砂に粉末状
の水溶性糖類を添加、混合したあとこの混合物に架橋剤
の水溶液と反応用触媒の水溶液とをそれぞれ添加して／
分間程度混練すればよく、水溶性糖類を予め溶解芒せる
必要がないので、溶解時間を省略できるうえに高粘度化
することがなくて取扱が容易となる。このようにして得
られた鋳物砂は型込め後に一定時間例えば常温造型の場
合には７５〜３０分、加熱造型の場合には７〜３分それ
ぞれ経過後に抜型または離型することにより大気中に放
置しても変形することのない低臭気性で良好な崩壊性を
有する鋳型を得ることができる０なお、本発明における
混練に用いる混練機はシンフ。The reason is that if the amount exceeds 0.15 parts by weight, the reaction is too fast (1)
, o o If it is less than O/part by weight, the reaction is too slow. The amount of the water-soluble saccharide added is 0.00 parts by weight per 700 parts by weight of silica sand. / parts by weight to 5 parts by weight is preferred. This is because if it exceeds 5 parts by weight, there will be problems in economy and disintegration, and if it falls below 0.7 parts by weight, the strength will become weak. In addition, the moisture content of the foundry sand is suitably in the range of 05 parts by weight to 25 parts by weight, preferably from ag parts to 2 parts by weight, based on 7.0 parts by weight of the binder. If it is less than that, the adhesion of the sand grains that fall during mold filling tends to be impaired, which may cause a decrease in strength and mold deformation. Therefore, when the aqueous solution of the crosslinking agent and the aqueous reaction catalyst are added and kneaded after adding and mixing the powdered water-soluble saccharide to silica sand, the hydroxyl groups of the water-soluble saccharide and the methylol groups of the crosslinking agent are combined with a small amount of water. In the presence of a reaction catalyst, the foundry sand quickly chemically bonds and changes from water-soluble to water-insoluble, so the foundry sand obtained by the method of the present invention does not absorb moisture even if left in high humidity for a long time, and remains hard. never changes. Further, according to the present invention, after adding and mixing powdered water-soluble saccharides to silica sand, an aqueous solution of a crosslinking agent and an aqueous solution of a reaction catalyst are respectively added to this mixture.
It is only necessary to knead for about a minute, and there is no need to dissolve the water-soluble saccharide in advance, so that the dissolution time can be omitted and the viscosity does not increase, making it easy to handle. The molding sand thus obtained is released into the atmosphere by being removed from the mold or released after a certain period of time has elapsed, for example, 75 to 30 minutes in the case of room temperature molding, and 7 to 3 minutes in the case of heated molding. A mold with low odor and good disintegration properties that does not deform even when left standing can be obtained. Note that the kneading machine used for kneading in the present invention is a simf.
ソンミル、スピードマラー、万能混合機などが利用７き
るし・また・前記反応月１媒の水溶液と架橋剤の水溶液
の添加順序は特に限定芒れるいことはない。A son mill, speed muller, universal mixer, etc. can be used. Furthermore, there is no particular restriction on the order in which the aqueous solution of the first reaction medium and the aqueous solution of the crosslinking agent are added.
（実施例／）
珪砂（オーストラリヤ産）１００重量部に水溶性糖類と
して粉末状の水溶性デキストリン（松谷化学社製、商品
名：パインテックス１００）１重量部を添加して万能混
合機で３０秒間混合したのち架橋剤として変性メラミン
（住友化学社製、商品名：スミテックスＭ Ｃ）の７０
％水溶液θＳ３重量部と反応用触媒として無水マレイン
酸の３．Ｓ％水溶液ａ乙０重量部をそれぞれ添加し、７
分間混練して鋳物砂を得た。この鋳物砂を抗圧力測定用
テスト枠の円柱状空洞部に型込めして１５分後に抜型し
た。直ちに、ｊＯ−φ×５０−の円柱状のテストヒース
を平板上面に立ててその上面中央部に２８ｎ′／ｍφの
円筒状荷重（／、 ２ ｋｙ ）を載せて１０分間放置
したが変形は全く見られなかった。なお、鋳物砂をつく
る過程においで架橋剤の水溶液および反応用触媒の水溶
液はいずれも低粘度（１０００，Ｐ、８以下）で供給が
容易であった。また、本実施例における鋳物砂の水分量
は粘結剤／重量部に対し０９ｇ重量部であった。また、
反応用触媒の水溶液としての無水マレイン酸の濃度を５
％、添加量を０． ’Ｉ ２重量部とした場合において
もテストピースの変形は全く見られず、鋳物砂をつくる
過程における架橋剤の水溶液と反応用触媒の水溶液はと
もに／ＱＱｑ−Ｐ−８以下と低粘度で供給が容易であっ
た。なお、この場合における鋳物砂の水分量は粘結剤／
重量部に対し０８２重量部であった。(Example/) 1 part by weight of powdered water-soluble dextrin (manufactured by Matsutani Chemical Co., Ltd., trade name: Pinetex 100) as a water-soluble saccharide was added to 100 parts by weight of silica sand (produced in Australia), and the mixture was mixed with a universal mixer for 30 seconds. After mixing, 70% of modified melamine (manufactured by Sumitomo Chemical Co., Ltd., trade name: Sumitex MC) was added as a crosslinking agent.
% aqueous solution θS and 3 parts by weight of maleic anhydride as a reaction catalyst. Add 0 parts by weight of S% aqueous solution a and 7
After kneading for a minute, foundry sand was obtained. This foundry sand was poured into a cylindrical cavity of a test frame for measuring resistance pressure, and the mold was removed after 15 minutes. Immediately, a cylindrical test heath of jO-φ×50- was placed on top of a flat plate, and a cylindrical load (/, 2 ky) of 28n'/mφ was placed on the center of the top surface and left for 10 minutes, but no deformation occurred. I couldn't see it. In addition, in the process of making foundry sand, both the aqueous solution of the crosslinking agent and the aqueous solution of the reaction catalyst had a low viscosity (1000, P, 8 or less) and were easy to supply. Further, the moisture content of the foundry sand in this example was 09 g parts by weight relative to the binder/parts by weight. Also,
The concentration of maleic anhydride as an aqueous solution of reaction catalyst was 5
%, the amount added is 0. Even when using 2 parts by weight of I, no deformation of the test piece was observed, and both the crosslinking agent aqueous solution and the reaction catalyst aqueous solution in the process of making foundry sand were supplied with a low viscosity of /QQq-P-8 or less. was easy. In addition, the moisture content of the foundry sand in this case is based on the binder/
It was 0.082 parts by weight.
（実施例）２）
前記実施例／と同じ架橋剤の７０％水溶液と反応用触媒
の４％水溶液を９４量混合し、直ちにその４０６重量部
を珪砂１００重計部と水溶性糖類としての粉末状の水溶
性デキストリンの混合物１０７重量部に添加して１分間
混練し、得られた鋳物砂を前記と同様のテストに供した
ところ、テストピースの変形は全く見られなかった。な
お、本実施例における鋳物砂の水分量は粘結剤／重置部
に対し０９２重量部であった。(Example) 2) Mix 94 amounts of a 70% aqueous solution of the same crosslinking agent as in the previous example and a 4% aqueous solution of a reaction catalyst, and immediately add 406 parts by weight of the mixture to 100 parts by weight of silica sand and powder as a water-soluble saccharide. When the foundry sand was added to 107 parts by weight of a water-soluble dextrin mixture and kneaded for 1 minute, the resulting foundry sand was subjected to the same test as above, and no deformation of the test piece was observed. The moisture content of the foundry sand in this example was 0.92 parts by weight based on the binder/overlapping part.
（発、明の効果）
以上の説明によって明らかなように、本発明によれば珪
砂に粉末状の水溶性糖類を添加、混合したあと架橋剤と
反応用触媒を含む水溶液を添加、混練するようにしたた
め水溶性糖類の溶解時間が省略できるとともに粘結剤の
取扱いが容易になりその結果鋳物砂の処理時間が短縮セ
き、また、鋳物砂の水分量の制御が可能になるうえに水
溶性糖類を含む水溶液の可使時間に制約されることがな
いなどの効果があり、業界の発展に寄与するところ極め
て大ｐものである。(Effects of the Invention and Invention) As is clear from the above explanation, according to the present invention, after adding and mixing powdered water-soluble saccharides to silica sand, an aqueous solution containing a crosslinking agent and a reaction catalyst is added and kneaded. This makes it possible to omit the dissolution time for water-soluble sugars, make it easier to handle the binder, and as a result, reduce the processing time for foundry sand.Also, it is possible to control the moisture content of foundry sand, and it also makes the water-soluble It has the effect of not being restricted by the pot life of an aqueous solution containing sugars, and is extremely useful in contributing to the development of the industry.
特許出願人 ダイセル化学工業株式会社−９武・Patent applicant: Daicel Chemical Industries, Ltd.
Claims (1)
またはメラミンのメチロール化物或いは尿素またはメラ
ミンのアルキル化メチロール化物から選ばれた架橋剤の
水溶液と有機酸、無機酸或いはこれらの金属、塩、アン
モニウム塩、アルカノールアミン塩から選ばれた反応用
触媒の水溶液とを添加、混練することを特徴とする鋳物
砂の製造方法。Powdered water-soluble saccharides are added and mixed with silica sand, and mixed with an aqueous solution of a crosslinking agent selected from methylolated products of urea or melamine, or alkylated methylolated products of urea or melamine, organic acids, inorganic acids, or these metals. A method for producing foundry sand, which comprises adding and kneading an aqueous solution of a reaction catalyst selected from salts, ammonium salts, and alkanolamine salts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15186983A JPS6044147A (en) | 1983-08-19 | 1983-08-19 | Production of molding sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15186983A JPS6044147A (en) | 1983-08-19 | 1983-08-19 | Production of molding sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6044147A true JPS6044147A (en) | 1985-03-09 |
Family
ID=15527992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15186983A Pending JPS6044147A (en) | 1983-08-19 | 1983-08-19 | Production of molding sand |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6044147A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5384291A (en) * | 1993-06-25 | 1995-01-24 | The Dow Chemical Company | Carbothermal synthesis precursors |
| WO2010025861A1 (en) * | 2008-09-05 | 2010-03-11 | Minelco Gmbh | Core or foundry sand coated and/or mixed with water glass, having a water content in the range of ≥ approximately 0.25 wt.% to approximately 0.9 wt.% |
| US9204945B2 (en) | 2010-12-09 | 2015-12-08 | 3M Innovative Properties Company | System comprising a rapid prototyping device and a material cartridge, a cartridge, and a method of using the system |
| US10208190B2 (en) | 2009-07-03 | 2019-02-19 | 3M Innovative Properties Company | Hydrophilic coatings, articles, coating compositions, and methods |
| US10297698B2 (en) | 2010-05-11 | 2019-05-21 | 3M Innovative Properties Company | Articles, coating compositions, and methods |
| US10400109B2 (en) | 2013-10-04 | 2019-09-03 | 3M Innovative Properties Company | Coatable composition, antistatic composition, antistatic articles, and methods of making the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56144841A (en) * | 1980-04-11 | 1981-11-11 | Sintokogio Ltd | Binder for molding sand |
-
1983
- 1983-08-19 JP JP15186983A patent/JPS6044147A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56144841A (en) * | 1980-04-11 | 1981-11-11 | Sintokogio Ltd | Binder for molding sand |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5384291A (en) * | 1993-06-25 | 1995-01-24 | The Dow Chemical Company | Carbothermal synthesis precursors |
| WO2010025861A1 (en) * | 2008-09-05 | 2010-03-11 | Minelco Gmbh | Core or foundry sand coated and/or mixed with water glass, having a water content in the range of ≥ approximately 0.25 wt.% to approximately 0.9 wt.% |
| EP2163328A1 (en) * | 2008-09-05 | 2010-03-17 | Minelco GmbH | Core or foundry sand coated and/or mixed with soluble glass with a water content in the area of >= approx. 0.25 weight % to approx 0.9 weight % |
| US8627877B2 (en) | 2008-09-05 | 2014-01-14 | Minelco Gmbh | Core or foundry sand coated and/or mixed with water glass with a water content in the range of ≧ approximately 0.25% by weight to approximately 0.9% by weight |
| US10208190B2 (en) | 2009-07-03 | 2019-02-19 | 3M Innovative Properties Company | Hydrophilic coatings, articles, coating compositions, and methods |
| US10297698B2 (en) | 2010-05-11 | 2019-05-21 | 3M Innovative Properties Company | Articles, coating compositions, and methods |
| US9204945B2 (en) | 2010-12-09 | 2015-12-08 | 3M Innovative Properties Company | System comprising a rapid prototyping device and a material cartridge, a cartridge, and a method of using the system |
| US10400109B2 (en) | 2013-10-04 | 2019-09-03 | 3M Innovative Properties Company | Coatable composition, antistatic composition, antistatic articles, and methods of making the same |
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