JPS60121034A - Production of curable casting mold - Google Patents
Production of curable casting moldInfo
- Publication number
- JPS60121034A JPS60121034A JP22935483A JP22935483A JPS60121034A JP S60121034 A JPS60121034 A JP S60121034A JP 22935483 A JP22935483 A JP 22935483A JP 22935483 A JP22935483 A JP 22935483A JP S60121034 A JPS60121034 A JP S60121034A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- hydrogen peroxide
- acidic
- weight
- stabilizer
- 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
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
- B22C1/22—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 resins or rosins
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は酸硬化性樹脂と過酸化物を添加した耐火性骨材
混合物にガス状又はエロゾル状二酸化硫黄を添加して鋳
型を成型する製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a manufacturing method in which a mold is formed by adding gaseous or aerosol sulfur dioxide to a refractory aggregate mixture containing an acid-curing resin and peroxide.
更に詳しくは本発明は過酸化物として水溶性有機溶剤及
び安定剤を含む過酸化水素組成物を使用する鋳型の製造
法に関するものである。More particularly, the present invention relates to a method for producing a mold using a hydrogen peroxide composition containing a water-soluble organic solvent and a stabilizer as the peroxide.
従来鋳物工場で中子及び主型を製造するに当り、産業廃
棄物公害の低減、生産性の合理化。Reducing industrial waste pollution and streamlining productivity when manufacturing cores and main molds in conventional foundries.
他諸々の利点により有機自硬性粘結剤を使用する鋳型製
造法が、水ガラス、セメント等無機系粘結剤を使用する
製造法に代わシ広く使用される様になった。しかし有機
自硬化性粘結剤を使用する鰭型製造法にもいくつかの難
点がある。Due to various other advantages, mold manufacturing methods using organic self-hardening binders have come to be widely used in place of manufacturing methods using inorganic binders such as water glass and cement. However, the fin manufacturing method using organic self-hardening binders also has some drawbacks.
その一つは粒状耐火物に樹脂と硬化剤を加えて混練する
ため可使時間が短かく、数分から数十分で化学反応によ
り硬化進行し、混練された砂の粘結力が失われる事であ
る。One of them is that the pot life is short because the granular refractory is kneaded with a resin and a hardening agent, and the hardening progresses through a chemical reaction within a few minutes to several tens of minutes, causing the kneaded sand to lose its cohesive strength. It is.
又模型に混練砂を成型して鋳型を製造するのに通常数十
分乃至は数時間の放置時間が必要である。In addition, in order to mold the kneaded sand into a model to produce a mold, it usually takes several minutes to several hours of standing time.
従って混練砂の可使時間に制限があり、且つ鋳型製造時
間に長時間を要する有機自硬性鋳型法は中・大量の鋳型
生産を必要とする分野には適当でない。Therefore, the organic self-hardening mold method, which has a limited pot life of the kneaded sand and requires a long time to produce molds, is not suitable for fields requiring medium to large quantities of mold production.
通常これらの用途には従来より７エノール樹脂を耐火性
骨材に被覆したものを熱硬化させるクローニング法やフ
ラン系樹脂を使用するポットボックス法があるが、近年
省エネルギ〜、更に生産性を向上させるためコールドボ
ックス法と呼ばれる砂型にガス状又はエロゾル状物質を
吹き込んで瞬時に鋳型を製造する方法がこれらの分野で
実用化されつつある。Conventionally, these applications include the cloning method, which involves heat curing of a fire-resistant aggregate coated with 7-enol resin, and the pot box method, which uses furan-based resin, but in recent years, energy saving and productivity improvements have been made. In order to do this, a method called the cold box method, in which a gas or aerosol substance is blown into a sand mold to instantaneously produce a mold, is being put into practical use in these fields.
コールドボックス法の一つに有機ポリインシアネートと
ポリオール型樹脂を鋳型用粘結剤として用い、エロゾル
状の３級アミンを注入して鋳型を硬化させるウレタン系
のコールドボックス法がある。この方法は鋳物製造時の
鋳砂の崩壊性が悪い、砂かみ、すくわれ、ピンホール。One of the cold box methods is a urethane-based cold box method in which an organic polyincyanate and a polyol-type resin are used as a mold binder, and an aerosol-like tertiary amine is injected to harden the mold. This method has poor disintegration of casting sand during casting production, resulting in sand trapping, scooping, and pinholes.
すす欠陥等の鋳造欠陥が発生しゃすい等の欠点がある。There are disadvantages such as the occurrence of casting defects such as soot defects.
それに代えて日本特許第８０７，７８６号に記載されて
いる７ラン系樹脂、フェノール系樹脂、尿素系樹脂の如
き酸硬化性樹脂を酸化剤存在下にガス状あるいはエロゾ
ル状の二酸化硫黄を吹き込んで硬化させる、所謂酸硬化
性コールドボックス法が前記ウレタン系コールドボック
ス法の難点を解決する方法として近年急速に注目を集め
ている。Instead, an acid-curing resin such as a 7-run resin, a phenol resin, or a urea resin described in Japanese Patent No. 807,786 is used in the presence of an oxidizing agent by blowing gaseous or aerosol sulfur dioxide into the resin. In recent years, the so-called acid-curing cold box method for curing has rapidly attracted attention as a method for solving the drawbacks of the urethane-based cold box method.
本発明はこの酸硬化性コールドボックス法の改良に関す
るものである。The present invention relates to improvements to this acid-curing cold box method.
酸硬化性コールドボックス法の酸化剤としてはケトン過
酸化物、ジアシル過酸化物、有機過酸、ハイドロ過酸化
物、ジアルキル過酸化物等が本質的に使用可能であるが
、硬化性、安全性。Ketone peroxides, diacyl peroxides, organic peroxides, hydroperoxides, dialkyl peroxides, etc. can essentially be used as oxidizing agents in the acid-curing cold box method, but they have poor curability and safety. .
鋳型特性等を考慮して、実用上メチルエチルケトン過酸
化物の如きケトン過酸化物、ターシャリ−・・イドロバ
−オキサイド５の如き・・イド口過酸化物が使用されて
いる。しかし、これら有機過酸化物は高価であり、又火
災による危険性の懸念があり、更にこれらの点の改良が
望まれている。In consideration of mold characteristics, etc., ketone peroxides such as methyl ethyl ketone peroxide and tertiary hydrocarbon peroxides such as tertiary hydrocarbon oxide 5 are used in practice. However, these organic peroxides are expensive and there are concerns about the danger of fire, and further improvements in these points are desired.
安価で、火気等による危険性が少ない過酸化物として過
酸化水素水があるが、このものは硬化性が劣る難点があ
り、実用的には余り使用されていない。Hydrogen peroxide is an inexpensive peroxide with little danger from fire, etc., but it has the disadvantage of poor curing properties and is not used much in practice.
即ち、酸硬化性コールドボックス法の酸化剤として過酸
化水素水を使用すると、耐火性骨材に酸硬化性樹脂、過
酸化水素水を混練した骨材混合物の可使時間が、過酸化
水素の分解に起因して短かい、あるいは二酸化硫黄を注
入して成型した鋳型が砂のＢ賢ＯＫ工ＮＧ が生じる結
果、表面安定性が低下する等の難点がある。In other words, when hydrogen peroxide is used as an oxidizing agent in the acid-curing cold box method, the pot life of the aggregate mixture made by kneading fire-resistant aggregate, acid-curing resin, and hydrogen peroxide increases Due to decomposition, short molds or molds formed by injecting sulfur dioxide may become sandy, resulting in problems such as decreased surface stability.
本発明者らは酸硬化性コールドボックス法の酸化剤とし
ての過酸化水素水の欠点を改良し、有機系過酸化物の難
点を改良すべく鋭意研究の結果、実用的に有用な過酸化
水素を主体とする酸化剤組成物を使用する事により上記
の難点が大巾に改良できることを見い出し、本発明に到
達した。The present inventors have conducted extensive research to improve the drawbacks of hydrogen peroxide as an oxidizing agent in the acid-curing cold box method and to improve the drawbacks of organic peroxides, and have found that hydrogen peroxide is practically useful. It has been discovered that the above-mentioned difficulties can be greatly improved by using an oxidizing agent composition mainly composed of
即ち、本発明は粒状耐火物と酸硬化性樹脂及び過酸化物
を混練成型し、ガス状又はエロゾル状の二酸化硫黄を添
加して鋳型を製造するに際し、過酸化物として水溶性有
機溶剤及び安定剤を含む過酸化水素組成物を使用するこ
とを特徴とする硬化性鋳型の製造法に係るものである。That is, the present invention involves kneading and molding a granular refractory, an acid-curing resin, and a peroxide, and adding gaseous or aerosol sulfur dioxide to produce a mold. The present invention relates to a method for producing a curable mold, characterized by using a hydrogen peroxide composition containing a hydrogen peroxide composition.
本発明に用いられる水溶性有機溶剤としては、２０℃で
の表面張力が２０〜３０ｄｙｎｅ／／ｃｒｎ２のものが
好ましく、具体的には炭素数１〜５のアルコール、炭素
数２〜１０の脂肪族、脂環族エーテル、炭素数３〜１０
の脂肪族、脂環族、脂肪族−芳香族ケトン、炭素数５〜
１０の脂肪族エーテルエステル等が挙げられる。又、安
定剤としてはオルソリン酸、メタリン酸、ポリリン酸の
如きリン酸同族体、リン酸２水素ナトリウムの如き酸性
リン酸塩、モノメチルリン酸の如き酸性リン酸エステル
、オルン硅酸、メタ硅酸の如き硅酸同族体あるいはその
酸性エステル乃至は酸性塩、硼酸、酸性硼酸エステル、
酸性硼酸塩、有機スルホン酸、ハロゲン化スズ、酸性ハ
ロゲン化スズ塩、スズ酸、酸性スズ酸エステル。The water-soluble organic solvent used in the present invention preferably has a surface tension of 20 to 30 dyne//crn2 at 20°C, specifically alcohols having 1 to 5 carbon atoms, aliphatic solvents having 2 to 10 carbon atoms, and , alicyclic ether, carbon number 3-10
aliphatic, alicyclic, aliphatic-aromatic ketone, carbon number 5-
10 aliphatic ether esters and the like. In addition, as stabilizers, phosphoric acid homologs such as orthophosphoric acid, metaphosphoric acid, and polyphosphoric acid, acidic phosphates such as sodium dihydrogen phosphate, acidic phosphoric acid esters such as monomethylphosphoric acid, orthosilicic acid, and metasilicic acid are used. Silicic acid analogues or acidic esters or acidic salts thereof, boric acid, acidic boric acid esters,
Acid borates, organic sulfonic acids, tin halides, acidic tin halide salts, stannic acids, acidic stannic acid esters.
酸性スズ酸塩、硼ハロゲン化水素酸あるいはその酸性塩
、ヒドロキシ多価カルボン酸あるいはその酸性塩等が使
用される。Acid stannate, borohydrohalide acid or its acid salt, hydroxy polyhydric carboxylic acid or its acid salt, etc. are used.
本発明の過酸化水素組成物としては、過酸化水素１５〜
５０％（重量基準、以下同じ）、好ましくは２０〜４０
％、水溶性有機溶剤５〜６０ｅＩ）、好ましくは５〜３
５％、安定剤５〜６０％、好ましくは１５〜５０％、水
分１５〜６０％、好ましくは１５〜３０％含有するもの
が好適に用いられる。The hydrogen peroxide composition of the present invention includes hydrogen peroxide 15 to
50% (by weight, same below), preferably 20-40
%, water-soluble organic solvent 5-60eI), preferably 5-3
5%, stabilizer 5-60%, preferably 15-50%, water content 15-60%, preferably 15-30%.
本発明において粒状耐火物としてけ硅質分の高い硼砂や
ジルコン砂、クロマイト砂等の酸硬化性コールドボック
ス法の鋳造用耐火物粒子は本質的に伺でも使用可能でこ
れらに拘束されるものではない。In the present invention, refractory particles for casting using the acid-curing cold box method such as borax sand, zircon sand, chromite sand, etc. with high silica content can essentially be used as granular refractories, and there is no restriction thereto. do not have.
又、酸硬化性樹脂としては酸を硬化触媒として硬化し得
る樹脂は全て使用可能であるが、一般には尿素／ホルム
アルデヒド樹脂、フェノール／ホルムアルデヒド樹脂、
７ラン樹脂、メラミン／ホルムアルデヒド樹脂の夫々単
独もしくはそれらの２種以上の配合乃至は共縮合された
組成物が用いられる。Furthermore, as the acid-curable resin, any resin that can be cured using an acid as a curing catalyst can be used, but in general, urea/formaldehyde resin, phenol/formaldehyde resin,
A 7-run resin or a melamine/formaldehyde resin may be used alone, or a combination or co-condensation of two or more thereof may be used.
通常、粒状耐火物１００重量部に対し、酸硬化性樹脂０
．５〜３．０重量部、酸化剤０．１〜１．０重量部使用
して鋳型を製造するが、本発明はこれに限定されるもの
ではない。Usually, 100 parts by weight of granular refractories are mixed with 0 parts of acid-curing resin.
．． Although the mold is manufactured using 5 to 3.0 parts by weight of the oxidizing agent and 0.1 to 1.0 parts by weight of the oxidizing agent, the present invention is not limited thereto.
更に本発明の詳細な説明するため、以下に実施例を記載
するが、実施例によシ本発明の範囲を制限するものでは
ない。Examples will be described below to further explain the present invention in detail, but the scope of the present invention is not limited to the Examples.
実施例１〜５及び比較例１〜３
石見砕砂１ 、０００重量部にフラン樹脂を１５重量部
、表−１に示す過酸化水素組成物を５重量部添加混練し
た後、混合物を一定時間放置して５０φＸ ５０ ｔｎ
／ｍ Ｈの型枠に充填し、二酸化硫黄を吹き込んだ後、
加圧空気で洗浄して鋳型を成型した。Examples 1 to 5 and Comparative Examples 1 to 3 After adding and kneading 15 parts by weight of furan resin and 5 parts by weight of the hydrogen peroxide composition shown in Table 1 to 1,000 parts by weight of Iwami crushed sand, the mixture was left for a certain period of time. 50φX 50 tn
/ m H after filling the mold and blowing in sulfur dioxide.
The mold was molded by cleaning with pressurized air.
鋳型を成型後、経時的に鋳型の圧縮強度を測定し評価し
た。結果を表−１に示す。After molding the mold, the compressive strength of the mold was measured and evaluated over time. The results are shown in Table-1.
実施例６〜１０及び比較例４〜８
耐火性粒状骨材として三栄銀砂を使用し、過酸化水素濃
度を５０ｑ６で一定として表−２に示す水溶性有機溶剤
及び安定剤を含有する過酸化水素組成物を三栄銀砂１，
０００重量部に対し、３・５重量部使用した他は実施例
１と同様に行なった。Examples 6 to 10 and Comparative Examples 4 to 8 Peroxide containing the water-soluble organic solvent and stabilizer shown in Table 2, using Sanei silver sand as the fire-resistant granular aggregate and keeping the hydrogen peroxide concentration constant at 50q6. Hydrogen composition Sanei silver sand 1,
The same procedure as in Example 1 was carried out except that 3.5 parts by weight of the 1,000 parts by weight was used.
結果を表−２に示す。The results are shown in Table-2.
Claims (1)
し、ガス状又はエロゾル状の二酸化硫黄を添加して鋳型
を製造するに際し、過酸化物として水溶性有機溶剤及び
安定剤を含む過酸化水素組成物を使用することを特徴と
する硬化性鋳型の製造法。 ２ 水溶性有機溶剤として、２０℃での表面張力が２０
〜３０ ａｙｎｅ／／ｃｍ のものを少なくとも−ｉ以
上用いる特許請求の範囲第１項記載の製造法。 ３ 安定剤としてオルソ燐酸、メタ燐酸、ポリ燐酸の如
き燐酸同族体あるいはその酸性エステル乃至は酸性塩、
オルン硅酸、メタ硅酸の如き硅酸同族体あるいはその酸
性エステル乃至は酸性塩、硼酸あるいはその酸性エステ
ル乃至は酸性塩、錫酸あるいはその酸性エステル乃至は
酸性塩、硼ハロゲン化水素酸あるいはその酸性塩、ヒド
ロキシ多価カルボン酸あるいはその酸性塩、有機スルホ
ン酸の内少なくとも１種を使用する特許請求の範囲第１
項又は２項記載の製造法。 ４ 過酸化水素組成物が、過酸化水素１５〜５０重ｉ−
係、水溶性有機溶剤５〜６０重量係。 安定剤５〜６０重量％を含有する特許請求の範囲第１項
、２項又は３項記載の製造法。 ５ 過酸化水素組成物が、過酸化水素２０〜４０重量係
、水溶性有機溶剤５〜３５重量係。 安定剤１５〜５０重量％を含有する特許請求の範囲第４
項記載の製造法。[Scope of Claims] 1. When manufacturing a mold by kneading and molding granular refractories, acid-curing resins, and peroxides, and adding gaseous or aerosol sulfur dioxide, a water-soluble organic solvent is used as the peroxide. A method for producing a curable mold, comprising using a hydrogen peroxide composition comprising: 2 As a water-soluble organic solvent, the surface tension at 20°C is 20
The manufacturing method according to claim 1, in which at least -i or more of -30 ayne//cm is used. 3. As a stabilizer, phosphoric acid homologs such as orthophosphoric acid, metaphosphoric acid, and polyphosphoric acid, or their acid esters or acid salts;
Silicic acid analogues such as orun-silicic acid and meta-silicic acid or their acidic esters or acidic salts, boric acid or its acidic esters or acidic salts, stannic acid or its acidic esters or acidic salts, borohydrohalic acid or its acidic acid Claim 1, which uses at least one of acid salts, hydroxy polycarboxylic acids or their acid salts, and organic sulfonic acids.
The manufacturing method described in item 2 or item 2. 4. The hydrogen peroxide composition contains 15 to 50 hydrogen peroxide
5 to 60% by weight of a water-soluble organic solvent. The method according to claim 1, 2 or 3, containing 5 to 60% by weight of stabilizer. 5. The hydrogen peroxide composition contains 20 to 40 parts by weight of hydrogen peroxide and 5 to 35 parts by weight of a water-soluble organic solvent. Claim 4 containing 15-50% by weight of stabilizer
Manufacturing method described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22935483A JPS60121034A (en) | 1983-12-05 | 1983-12-05 | Production of curable casting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22935483A JPS60121034A (en) | 1983-12-05 | 1983-12-05 | Production of curable casting mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60121034A true JPS60121034A (en) | 1985-06-28 |
Family
ID=16890845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22935483A Pending JPS60121034A (en) | 1983-12-05 | 1983-12-05 | Production of curable casting mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60121034A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60141347A (en) * | 1983-12-27 | 1985-07-26 | Kaou Kueekaa Kk | Peroxide composition for casting mold |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58112627A (en) * | 1981-12-21 | 1983-07-05 | アクゾ・ナ−ムロ−ゼ・フエンノ−トシヤツプ | Manufacture of mold or core |
-
1983
- 1983-12-05 JP JP22935483A patent/JPS60121034A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58112627A (en) * | 1981-12-21 | 1983-07-05 | アクゾ・ナ−ムロ−ゼ・フエンノ−トシヤツプ | Manufacture of mold or core |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60141347A (en) * | 1983-12-27 | 1985-07-26 | Kaou Kueekaa Kk | Peroxide composition for casting mold |
| JPH0422655B2 (en) * | 1983-12-27 | 1992-04-20 | Kao Quaker Co |
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