JPH0352742A - Manufacture of mold - Google Patents
Manufacture of moldInfo
- Publication number
- JPH0352742A JPH0352742A JP18859389A JP18859389A JPH0352742A JP H0352742 A JPH0352742 A JP H0352742A JP 18859389 A JP18859389 A JP 18859389A JP 18859389 A JP18859389 A JP 18859389A JP H0352742 A JPH0352742 A JP H0352742A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- acid
- resin
- solvent
- casting
- 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
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- Mold Materials And Core Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は鋳型の製造方法に関するものであり、更に詳し
くは、耐火性骨材に酸硬化性樹脂と酸性硬化剤を作用さ
せて鋳型を製造する自硬性及びガス硬化性コールドボッ
クスの鋳型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 manufacturing a mold, and more specifically, a method for manufacturing a mold by applying an acid-curing resin and an acid curing agent to a fire-resistant aggregate. The present invention relates to a method for manufacturing a mold for a self-hardening and gas-hardening cold box.
〔従来の技術及び発明が解決しようとする課題〕フルモ
ールド法は、発泡ボリスチレンにて製作した模型を鋳型
内より抜型することなく、鋳型内に充填したままで鋳型
としての利用が可能である。その為、一体或形された模
型を使用できるために鋳型の製造工程も簡略化され、そ
れによる工数低減は顕著なものがある。[Prior Art and Problems to be Solved by the Invention] In the full mold method, a model made of expanded polystyrene can be used as a mold while being filled in the mold without being removed from the mold. Therefore, since an integrally shaped model can be used, the mold manufacturing process is also simplified, and the man-hour reduction thereby is significant.
このようにメリットの多いフルモールド法も、多種少量
生産工場では種々な問題により従来の模型材料の代用と
して利用されている割合は、非常に少ない。すなわち、
製品鋳物が大きくなると鋳込まれた溶湯熱によってポリ
スチレンより気化発生するガス量が多くなり、鋳型の通
気度の悪い場合には、気化した発生ガスを鋳込溶湯内に
巻き込み、ガス欠陥として残留する問題などが発生する
ことがある。Although the full mold method has many advantages, it is rarely used as a substitute for conventional model materials in factories that produce a wide variety of products in small quantities due to various problems. That is,
As the product casting becomes larger, the amount of gas vaporized by the heat of the cast molten metal will be greater than that of polystyrene, and if the ventilation of the mold is poor, the vaporized gas will be drawn into the molten metal and remain as gas defects. Problems may occur.
一方、発泡ポリスチレンを構威する炭素が粘稠な残渣と
なって鋳物上面に付着し鋳肌を悪くすることも多い。On the other hand, the carbon that makes up expanded polystyrene often becomes a viscous residue that adheres to the upper surface of the casting, worsening the casting surface.
これらの問題の為に、模型材料としての発泡ポリスチレ
ンの利用は、模型を鋳型内より除去する従来の鋳型造型
法のように、分割型とし鋳込前に抜型したり、また木材
の一部代用とし利用しているケースが多い。Because of these problems, the use of expanded polystyrene as a model material is difficult, as in the traditional mold making method in which the model is removed from the mold, it can be divided into parts and removed before casting, or it can be used as a partial substitute for wood. There are many cases where it is used.
フルモールド法には前記のような長所があるが、発泡ポ
リスチレンを鋳型内に充填し注湯することに起因する鋳
造欠陥も多々ある。それで、上記欠点をなくする為、耐
火性骨材に酸硬化性樹脂と酸性硬化剤を作用させて鋳型
が硬化した時点で、鋳型より発泡スチロール模型を抜き
取る事がよく行われている。Although the full mold method has the above-mentioned advantages, there are many casting defects caused by filling expanded polystyrene into a mold and pouring the metal. Therefore, in order to eliminate the above-mentioned drawbacks, it is common practice to apply an acid-curing resin and an acid curing agent to the fire-resistant aggregate, and then remove the expanded polystyrene model from the mold once the mold has hardened.
しかし、酸硬化性樹脂を用いた場合、鋳型の硬化時に酸
硬化性樹脂の収縮により鋳型が収縮し、鋳型よりの発泡
スチロール模型の離型性が悪く発泡スチロール模型をむ
しりとる等の方法を行う為、発泡スチロール模型の離型
に時間を要する。又、鋳型に傷がつくことがあり、鋳物
品質が低下する欠点もあった。However, when acid-curing resin is used, the mold shrinks due to contraction of the acid-curing resin when the mold hardens, and the releasability of the Styrofoam model from the mold is poor, resulting in methods such as peeling off the Styrofoam model. It takes time to release the Styrofoam model. In addition, there was also the drawback that the mold was sometimes damaged, resulting in a decrease in the quality of the casting.
本発明者らはこのような課題を解決すべく、鋭意研究を
行った結果、本発明を完威するに至った。The inventors of the present invention conducted extensive research to solve these problems, and as a result, they were able to perfect the present invention.
即ち、本発明は、耐火性骨材に、鋳物用粘結剤としてフ
ラン樹脂、レゾール型フェノール樹脂又はこれらを混合
もしくは共縮合させた酸硬化性樹脂、酸性硬化剤、並び
にＡ−１〜Ａ＋１の溶解度パラメータ（但し、Ａは合成
樹脂発泡体の溶解度パラメータを示す）をもつ溶剤を添
加混練した鋳砂に、合成樹脂発泡体製の模型を埋設し、
鋳型威型後該発泡体を抜型することを特徴とする鋳型の
製造方法を提供するものである。That is, the present invention provides a refractory aggregate, a furan resin, a resol type phenol resin, or an acid-curing resin mixed or co-condensed with these as a casting binder, an acid curing agent, and A-1 to A+1. A model made of synthetic resin foam is buried in casting sand mixed with a solvent having a solubility parameter (A indicates the solubility parameter of the synthetic resin foam),
The present invention provides a method for manufacturing a mold, characterized in that the foam is removed from the mold after molding.
本発明に用いられる酸硬化性樹脂として好ましいものは
、フルフリルアルコール或いはフェノール類を主原料と
し、フルフリルアルコール、フルフリルアルコール／ア
ルデヒド重縮合物、フェノール類、フェノール類／アル
デヒド重縮合物、尿素、尿素／アルデヒド重縮合物、メ
ラ逅ン、メラミン／アルデヒド重縮合物、ケトン／アル
デヒド重縮金物、芳香族炭化水素／アルデヒド重縮合物
、一分子中に１個以上のアルデヒド基を有する化合物の
少なくとも一種を混合乃至共縮合せしめたものが挙げら
れる。Preferred acid-curing resins used in the present invention include furfuryl alcohol or phenols as main raw materials, furfuryl alcohol, furfuryl alcohol/aldehyde polycondensates, phenols, phenols/aldehyde polycondensates, and urea. , urea/aldehyde polycondensates, melamine, melamine/aldehyde polycondensates, ketone/aldehyde polycondensates, aromatic hydrocarbon/aldehyde polycondensates, compounds having one or more aldehyde groups in one molecule. Examples include those obtained by mixing or co-condensing at least one of them.
このような酸硬化性樹脂は耐火性骨材に対して０．０５
〜１０重量％添加するのが好ましい。Such acid-curing resins have a ratio of 0.05 to the refractory aggregate.
It is preferable to add up to 10% by weight.
又、本発明において用いられる、酸性硬化剤としてはバ
ラトルエンスルホン酸、キシレンスルホン酸等の有機ス
ルホン酸や、リン酸、硫酸等の無機酸やこれらの混合物
が挙げられるが、特に限定されるものではない。In addition, examples of the acidic curing agent used in the present invention include organic sulfonic acids such as balatoluenesulfonic acid and xylene sulfonic acid, inorganic acids such as phosphoric acid and sulfuric acid, and mixtures thereof, but there are no particular limitations. isn't it.
このような酸性硬化剤は耐火性骨材に対して０．０５〜
５重量％添加するのが好ましい。Such acidic curing agent is 0.05~
It is preferable to add 5% by weight.
又、本発明に用いられるＡ−１−Ａ＋１の溶解度パラメ
ータをもつ溶剤、即ち合成樹脂発泡体と近い溶解度パラ
メータをもつ溶剤は、合威・樹脂発泡体を溶解もしくは
収縮させる様な溶剤であり、具体的には次のようなもの
が挙げられる。Furthermore, the solvent used in the present invention with a solubility parameter of A-1-A+1, that is, a solvent with a solubility parameter close to that of the synthetic resin foam, is a solvent that dissolves or shrinks the synthetic resin foam. Specifically, the following can be mentioned.
即ち、トルエン、キシレン、エチルベンゼン、クメン、
テトラリン、ブチルベンゼン、ジエチルベンゼン、エチ
ルトルエン、トリメチルベンゼン、シクロヘキサン、メ
チルシクロヘキサン、エチルシクロヘキサン、エチレン
グリコールジエチルエーテル、エチレングリコールジブ
チルエーテル、ジエチルグリコールジメチルエーテル、
ジプロピルエーテル、ベンズアルデヒド、メチルプロピ
ルケトン、メチルイソブチルケトン、ジイソブチルケト
ン、イソホロン、シクロヘキサノン、メチルシクロヘキ
サノン、酢酸プロビル、酢酸ブチル、酢酸イソブチル、
酢酸ペンチル、フタル酸ジブチル、エチレングリコール
ジアセテート、ジエチレングリコールジェチルエーテル
アセテート等である。Namely, toluene, xylene, ethylbenzene, cumene,
Tetralin, butylbenzene, diethylbenzene, ethyltoluene, trimethylbenzene, cyclohexane, methylcyclohexane, ethylcyclohexane, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethyl glycol dimethyl ether,
Dipropyl ether, benzaldehyde, methylpropyl ketone, methyl isobutyl ketone, diisobutyl ketone, isophorone, cyclohexanone, methylcyclohexanone, proyl acetate, butyl acetate, isobutyl acetate,
These include pentyl acetate, dibutyl phthalate, ethylene glycol diacetate, diethylene glycol jetyl ether acetate, and the like.
これら溶剤の一種又は二種以上が、耐火性骨材１００重
量部に対して０．０５〜５重量部、好ましくは０．１〜
２重量部使用される。One or more of these solvents is 0.05 to 5 parts by weight, preferably 0.1 to 5 parts by weight, per 100 parts by weight of the refractory aggregate.
2 parts by weight are used.
本発明における上記溶剤の耐火性骨材への添加方法とし
ては、耐火性骨材へ直接添加する方法或いは酸硬化性樹
脂又は酸性硬化剤等に溶解或いは分散させて添加する方
法があり、特に限定されるものではない。The method of adding the above-mentioned solvent to the fire-resistant aggregate in the present invention includes a method of directly adding it to the fire-resistant aggregate, a method of adding it by dissolving or dispersing it in an acid-curing resin or an acid curing agent, etc., and there are no particular limitations. It is not something that will be done.
尚、各種溶剤及び合成樹脂の溶解度パラメータはｒ高分
子データハンドブック」 （高分子学会＆Ｗ１９８６）
、「高分子分析ハンドブック」 （朝倉書店、昭和４０
年５月３０日発行）に記載されている。In addition, the solubility parameters of various solvents and synthetic resins can be found in the ``Polymer Data Handbook'' (The Society of Polymer Science & W1986).
, “Polymer Analysis Handbook” (Asakura Shoten, 1966)
published on May 30, 2013).
本発明において、合成樹脂発泡体としては、ポリスチレ
ン、ポリエチレン、ポリプロピレン等の発泡体が用いら
れるが、特にボリスチレンが一般的である。In the present invention, as the synthetic resin foam, foams such as polystyrene, polyethylene, and polypropylene are used, and polystyrene is particularly common.
ポリスチレン発泡体においては、発泡体の収縮効果及び
鋳型の硬化特性への影響を考えた場合、溶剤としては芳
香族炭化水素が好ましい。In polystyrene foam, aromatic hydrocarbons are preferred as the solvent in view of the shrinkage effect of the foam and the influence on the curing properties of the mold.
即チ、トルエン、キシレン、エチルベンゼン、クメン、
トリメチルベンゼン、テトラリン、ブチルベンゼン、ジ
エチルベンゼン、エチルトルエン等が好ましい。Sodium, toluene, xylene, ethylbenzene, cumene,
Trimethylbenzene, tetralin, butylbenzene, diethylbenzene, ethyltoluene and the like are preferred.
又、本発明において、発泡スチロール模型等の合成樹脂
発泡体製の模型の砂型よりの離型性をより改善せしめる
為、合成樹脂発泡体製の模型に予め、無機粉末・塗料等
を塗布する場合が有るが、特に限定されるものではない
。In addition, in the present invention, in order to further improve the releasability of a model made of synthetic resin foam such as a styrofoam model from a sand mold, inorganic powder, paint, etc. may be applied to the model made of synthetic resin foam in advance. Yes, but it is not particularly limited.
又、本発明において、鋳型の強度アップ、耐湿性向上の
ためシランカップリング剤を酸硬化性樹脂に含有させる
等の公知の添加剤を含有せしめることもできる。Further, in the present invention, known additives such as a silane coupling agent may be included in the acid-curing resin in order to increase the strength and moisture resistance of the mold.
本発明において、鋳型を製造するには、本発明に係わる
粘結剤と共に、耐火性骨材として、石英質を主或分とす
る珪砂の他、ジルコン砂、クロマイト砂等が使用される
が、特に限定されるものではない。In the present invention, in order to manufacture a mold, silica sand mainly composed of quartz, zircon sand, chromite sand, etc. are used as a refractory aggregate together with the binder according to the present invention. It is not particularly limited.
以下、実施例により本発明を更に詳細に説明するが、本
発明はこれらの実施例のみに限定されるものではない。EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited only to these Examples.
実施例１〜５及び比較例１〜２
鋳物用フラン樹脂使用硅砂再生砂１００重量部に対し、
酸硬化性樹脂（花王■製，「カオーライトナー３４０Ｂ
Ｊ ）０．８重量部、硬化剤（花王■製，「カオーライ
トナーＴＫ−３Ｊ ）０．４重量部、及び表一１に示す
溶剤を表−１に示す量混練した混練砂で、５００ ｃｃ
ポリカップの中に２４Ｘ５０Ｘ１３５ ｎｕｎの発泡ス
チロール（溶解度パラメータ９．１）を埋め込み、０．
５時間、１．５時間後に発泡スチロールを引抜き、抜け
の程度及び発泡スチロールの状態を観察した。Examples 1 to 5 and Comparative Examples 1 to 2 For 100 parts by weight of recycled silica sand using furan resin for casting,
Acid-curing resin (manufactured by Kao ■, "Kaolite Toner 340B")
J) 0.8 parts by weight, 0.4 parts by weight of a curing agent (manufactured by Kao ■, "Kaolite Toner TK-3J"), and the solvent shown in Table 1 in the amount shown in Table 1, and 500 cc of kneaded sand was mixed.
Styrofoam (solubility parameter 9.1) of 24 x 50 x 135 nun was embedded in a polycup, and 0.
After 5 hours and 1.5 hours, the Styrofoam was pulled out, and the degree of pulling out and the condition of the Styrofoam were observed.
又、上記の混練した砂を用い、直径５０ｍｍ、高さ５０
ｍｍの円筒形のテストピースを作威し、混線後０．５時
間、１．５時間、２４時間後の砂型の圧縮強度を測定し
た。Also, using the above kneaded sand, a diameter of 50 mm and a height of 50
A cylindrical test piece with a diameter of 1.5 mm was prepared, and the compressive strength of the sand mold was measured 0.5 hours, 1.5 hours, and 24 hours after crosstalk.
結果を表−１に示す。The results are shown in Table-1.
Claims (1)
ゾール型フェノール樹脂又はこれらを混合もしくは共縮
合させた酸硬化性樹脂、酸性硬化剤、並びにＡ−１〜Ａ
＋１の溶解度パラメータ（但し、Ａは合成樹脂発泡体の
溶解度パラメータを示す）をもつ溶剤を添加混練した鋳
砂に、合成樹脂発泡体製の模型を埋設し、鋳型成型後該
発泡体を抜型することを特徴とする鋳型の製造方法。 ２、溶剤の沸点が８０℃以上であることを特徴とする請
求項１記載の鋳型の製造方法。 ３、酸硬化性樹脂、酸性硬化剤及び溶剤の添加量が耐火
性骨材に対してそれぞれ、酸硬化性樹脂０．０５〜１０
重量％、酸性硬化剤０．０５〜５重量％及び溶剤０．０
５〜５重量％であることを特徴とする請求項１記載の鋳
型の製造方法。[Scope of Claims] 1. Furan resin, resol type phenol resin, acid curing resin mixed or co-condensed with these as a foundry binder, acid curing agent, and A-1 to refractory aggregate; A
A model made of synthetic resin foam is buried in casting sand mixed with a solvent having a solubility parameter of +1 (where A indicates the solubility parameter of synthetic resin foam), and after molding, the foam is cut out of the mold. A method for manufacturing a mold, characterized by: 2. The method for manufacturing a mold according to claim 1, wherein the boiling point of the solvent is 80°C or higher. 3. Addition amount of acid-curing resin, acid curing agent and solvent is 0.05 to 10% of acid-curing resin to fire-resistant aggregate, respectively.
wt%, acid curing agent 0.05-5 wt% and solvent 0.0
2. The method for manufacturing a mold according to claim 1, wherein the content is 5 to 5% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18859389A JP2698665B2 (en) | 1989-07-20 | 1989-07-20 | Mold production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18859389A JP2698665B2 (en) | 1989-07-20 | 1989-07-20 | Mold production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0352742A true JPH0352742A (en) | 1991-03-06 |
| JP2698665B2 JP2698665B2 (en) | 1998-01-19 |
Family
ID=16226376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18859389A Expired - Lifetime JP2698665B2 (en) | 1989-07-20 | 1989-07-20 | Mold production method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2698665B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999014003A1 (en) * | 1997-09-12 | 1999-03-25 | Kao Corporation | Acid-curable, refractory particulate material composition for forming mold |
| US6129763A (en) * | 1996-09-13 | 2000-10-10 | Chauvin; Jean-Luc | Expandable osteosynthesis cage |
| US9707095B2 (en) | 2014-06-04 | 2017-07-18 | Wenzel Spine, Inc. | Bilaterally expanding intervertebral body fusion device |
| US11219531B2 (en) | 2019-04-10 | 2022-01-11 | Wenzel Spine, Inc. | Rotatable intervertebral spacing implant |
-
1989
- 1989-07-20 JP JP18859389A patent/JP2698665B2/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6129763A (en) * | 1996-09-13 | 2000-10-10 | Chauvin; Jean-Luc | Expandable osteosynthesis cage |
| US6371989B1 (en) | 1996-09-13 | 2002-04-16 | Jean-Luc Chauvin | Method of providing proper vertebral spacing |
| WO1999014003A1 (en) * | 1997-09-12 | 1999-03-25 | Kao Corporation | Acid-curable, refractory particulate material composition for forming mold |
| GB2346371A (en) * | 1997-09-12 | 2000-08-09 | Kao Corp | Acid-curable refractory particulate material composition for forming mold |
| US6326418B1 (en) | 1997-09-12 | 2001-12-04 | Kao Corporation | Acid-curable, refractory particulate material composition for forming mold |
| GB2346371B (en) * | 1997-09-12 | 2002-04-03 | Kao Corp | Acid-curable refractory particulate material composition for forming mold |
| CN1325192C (en) * | 1997-09-12 | 2007-07-11 | 花王株式会社 | Acid-curable, refractory particulate material composition for forming mold |
| US9707095B2 (en) | 2014-06-04 | 2017-07-18 | Wenzel Spine, Inc. | Bilaterally expanding intervertebral body fusion device |
| US10098756B2 (en) | 2014-06-04 | 2018-10-16 | Wenzel Spine, Inc. | Bilaterally expanding intervertebral body fusion device |
| US10945857B2 (en) | 2014-06-04 | 2021-03-16 | Wenzel Spine, Inc. | Bilaterally expanding intervertebral body fusion device |
| US11219531B2 (en) | 2019-04-10 | 2022-01-11 | Wenzel Spine, Inc. | Rotatable intervertebral spacing implant |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2698665B2 (en) | 1998-01-19 |
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