JPH0636954B2 - Composition for easily disintegrating mold - Google Patents
Composition for easily disintegrating moldInfo
- Publication number
- JPH0636954B2 JPH0636954B2 JP62194765A JP19476587A JPH0636954B2 JP H0636954 B2 JPH0636954 B2 JP H0636954B2 JP 62194765 A JP62194765 A JP 62194765A JP 19476587 A JP19476587 A JP 19476587A JP H0636954 B2 JPH0636954 B2 JP H0636954B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- weight
- powder
- shell
- fossil
- 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 - Lifetime
Links
- 239000000203 mixture Substances 0.000 title claims description 13
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 30
- 239000000843 powder Substances 0.000 claims description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 21
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 8
- 239000011819 refractory material Substances 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 239000005350 fused silica glass Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910052845 zircon Inorganic materials 0.000 claims description 3
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 3
- -1 chamotte Chemical compound 0.000 claims description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 2
- 239000010433 feldspar Substances 0.000 claims description 2
- 229910052863 mullite Inorganic materials 0.000 claims description 2
- 238000005266 casting Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 15
- 239000000919 ceramic Substances 0.000 description 14
- 239000011162 core material Substances 0.000 description 11
- 238000005495 investment casting Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 239000007787 solid Substances 0.000 description 10
- 238000010304 firing Methods 0.000 description 9
- 239000002002 slurry Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000004568 cement Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical group [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000002076 thermal analysis method Methods 0.000 description 4
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000004848 polyfunctional curative Substances 0.000 description 2
- 235000015170 shellfish Nutrition 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 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
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010420 shell particle Substances 0.000 description 1
- 238000010112 shell-mould casting Methods 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910000018 strontium carbonate Inorganic materials 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はインベストメント鋳造法におけるセラミックシ
エルモールド法及びソリッドモールド法等の精密鋳造用
鋳型、あるいは泥しようセラミック材料の成形用鋳型の
製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for producing a precision casting mold such as a ceramic shell molding method and a solid molding method in an investment casting method, or a method for manufacturing a casting mold of a mud-ceramic material.
（従来技術） 従来、精密鋳造における鋳型材料としては、シャモッ
ト、溶融シリカ、アルミナ、ジルコン等の熱的・化学的
に比較的安定な耐火物材料が使用されているが、これら
の耐火物材料を使用した鋳型の強度は高く、鋳造後にお
いても粘結剤の強い結合によって鋳造品から耐火物を除
去するのは容易でなく、機械的または化学的な方法によ
って後処理をしている。精密鋳造において上記の欠点を
改良するものとして、鋳型材料に炭酸カルシウムを配合
する提案が種々なされている。例えば特公昭４９−２６
５５号公報では、鋳型材料として炭酸カルシウムを添加
し、鋳型組成物中に１０重量％以上含有せしめ、かつ鋳
型の焼成温度を８５０℃以上とし、鋳型の一部を酸化カ
ルシウムとすることゆより崩壊性の優れた精密鋳造用鋳
型の製造方法が提案された。(Prior Art) Conventionally, refractory materials that are relatively stable thermally and chemically such as chamotte, fused silica, alumina, and zircon have been used as mold materials in precision casting. The strength of the mold used is high, and it is not easy to remove the refractory from the cast product by the strong binding of the binder even after casting, and the post-treatment is performed by a mechanical or chemical method. Various proposals have been made to improve the above-mentioned drawbacks in precision casting by incorporating calcium carbonate into a mold material. For example, Japanese Patent Publication No. Sho 49-26
According to Japanese Patent Publication No. 55-55, calcium carbonate is added as a template material so that 10% by weight or more is contained in the template composition, the firing temperature of the template is 850 ° C. or more, and a part of the template is calcium oxide. A method for producing a precision casting mold having excellent properties has been proposed.
また従来から、泥しようセラミック材料の鋳込み成形法
として石膏型によるグリーンボディの成形を行ってい
る。しかし、成形品の形状が複雑になれば分割型か多く
必要となり、量産には適しないものである。Further, conventionally, a plaster mold is used to mold a green body as a casting method for a mud-ceramic material. However, if the shape of the molded product becomes complicated, many split molds are required, which is not suitable for mass production.
（発明が解決せんとする問題点） 前記の特許公報に記載された鋳型配合物としての炭酸カ
ルシウムは、加熱により酸化カルシウムとなり、前記の
優れた特性を有している。しかしなお当該法では、鋳型
材料として炭酸カルシウム１０重量％以上添加、配合す
る必要があり、かつ鋳型の焼成温度を８５０℃以上とし
なければならない。驚くべきことに具化石粉末を炭酸カ
ルシウム源として用いることにより、７６０℃の低い焼
成温度においても崩壊性の良い鋳型を作り得ること、ま
た銅合金等の高融点金属においても、該鋳型の崩壊性を
失わせることなく鋳造性を保持し得ることを見い出し、
本発明を完成したものである。(Problems to be Solved by the Invention) Calcium carbonate as a mold composition described in the above patent publication becomes calcium oxide by heating and has the above-mentioned excellent properties. However, in this method, it is necessary to add and mix 10% by weight or more of calcium carbonate as a mold material, and the baking temperature of the mold must be 850 ° C or higher. Surprisingly, by using the fossil powder as a calcium carbonate source, it is possible to form a mold having good disintegration property even at a low firing temperature of 760 ° C., and also in the case of a refractory metal such as a copper alloy, the disintegration property of the mold Found that castability can be maintained without losing the
The present invention has been completed.
また、本発明は複雑形状のセラミックス成形品には分割
型が多く必要であるという従来法の欠点を改良し、セラ
ミックスの泥しよう鋳込みにおいて型を分割することな
くグリーンボデイの成形を行うことを目的とするもので
ある。Another object of the present invention is to improve the drawbacks of the conventional method that a large number of split dies are required for a ceramics molded article having a complicated shape, and to form a green body without splitting the die in the mud casting of ceramics. It is what
（発明の構成） 本発明の出発材料として使用する貝化石粉末は、堆積層
によって該粉末組成物の成分量は変化するが、貝化石粉
末が炭酸カルシウム１０〜９０重量％、残部が珪砂及び
長石その他粘土質組成物である。その他粘土質組成物中
にはアルミナ、酸化第二鉄、酸化マグネシウム、炭酸ス
トロンチウム等が含まれる。ＪＩＳ−Ｍ８８５０に準じ
て分析した結果の一例は第１表に示すとおりであった。
該粉末は、通常の精密鋳造用鋳型材料に比べ非常に安価
でかつ豊富に産出する。貝化石粉末中の炭酸カルシウム
は加熱されることによって熱分解し、炭酸ガスを放出し
て酸化カルシウムに変化する。(Structure of the Invention) The shell fossil powder used as the starting material of the present invention varies in the amount of components of the powder composition depending on the sediment layer, but the shell fossil powder is 10 to 90% by weight of calcium carbonate, and the balance is silica sand and feldspar. It is another clay composition. Other clay-like compositions include alumina, ferric oxide, magnesium oxide, strontium carbonate, and the like. Table 1 shows an example of the results of analysis according to JIS-M8850.
The powder is much cheaper and more abundant than ordinary precision casting mold materials. The calcium carbonate in the shellfish fossil powder is thermally decomposed by being heated, and carbon dioxide gas is released to change to calcium oxide.
本発明による鋳型材料ある貝化石粉末は炭酸カルシウム
単独で添加、配合された鋳型に比べ、低い焼成温度で前
記反応を生じる。これは貝化石の粒子が微細な空隙をも
つ多孔質な形状であることから、加熱によって炭酸ガス
の放出が促進されるためと思われる。第１図には炭酸カ
ルシウム、第２図には貝化石粉末の熱分析図の一例を示
す。The mold fossil powder, which is a template material according to the present invention, causes the above reaction at a lower firing temperature as compared with a template in which calcium carbonate alone is added and blended. This is probably because the fossil shell particles have a porous shape with minute voids, and heating accelerates the release of carbon dioxide. Fig. 1 shows an example of a thermal analysis diagram of calcium carbonate and Fig. 2 shows a thermal analysis diagram of a fossil shell powder.
精密鋳造においてセラミックシエルモールド及びソリッ
ドモールドを使用することは当技術分野においては周知
のプロセスである。The use of ceramic shell molds and solid molds in precision casting is a process well known in the art.
本発明による貝化石粉末を使用したセラミックシエルモ
ールドはシリカゾルまたはエチルシリケート加水分解液
を粘結剤として、該粉末もしくは一部耐火物粉末を添
加、配合することによってスラリーを作成し、溶融可能
な模型を該スラリーに浸漬して前記耐火物粒子を被覆
後、乾燥する。A ceramic shell mold using the shell fossil powder according to the present invention is a meltable model in which a slurry is prepared by adding and mixing silica sol or ethyl silicate hydrolyzed liquid as a binder with the powder or a part of the refractory powder. Is dipped in the slurry to coat the refractory particles and then dried.
必要とする鋳型厚みが形成されるまで、模型にディッ
プ、スタッコ、乾燥を繰り返し行う。このときシリカ重
量約２０％以上のシリカゾルで作成したスラリーによる
鋳型は、加熱により前記ゾルに含まれるＳｉＯ２の結合
及び鋳型組成物粒子との結合が強固となるため、鋳造後
の鋳型の崩壊性が損なわれ易くなる。また粘結剤として
エチルシリケート加水分解液を使用する時には、該粘結
剤のｐＨ値は１〜３で酸性側であるため、耐酸性を有す
る界面活性剤の添加によってスラリーのゲル化を防ぐ必
要がある。さらに、本発明による貝化石粉末を使用した
ソリッドモールドもしくは中子型は、該粉末７重量％以
上配合し、残部がその他耐火物材料で構成される骨材に
対して、セメント系硬化剤１５〜３０重量％及び水２５
〜３５重量％添加・配合して作成した泥しよう中に溶融
可能な模型を埋没し、該泥しようを硬化させて造型す
る。Dip, stucco and dry the model repeatedly until the required mold thickness is achieved. At this time, the mold made of the slurry made of silica sol having a silica weight of about 20% or more strengthens the bond of SiO 2 contained in the sol and the bond with the mold composition particles by heating, so that the mold disintegrates after casting. Is easily damaged. When an ethyl silicate hydrolyzed liquid is used as a binder, the pH value of the binder is 1 to 3 on the acidic side. Therefore, it is necessary to prevent the gelation of the slurry by adding a surfactant having acid resistance. There is. Furthermore, the solid mold or core mold using the shell fossil powder according to the present invention contains 7% by weight or more of the powder, and the cement-based hardening agent 15 to 30 wt% and water 25
Approximately 35% by weight is added and blended to bury the meltable model in the mud, and the mud is hardened and molded.
ソリッドモールドの硬化剤として石膏（硫酸カルシウ
ム）もしくはエチルシリケート加水分解液等の無機系材
料の使用が可能であるが、発明者らが種々実験をした結
果、急結性を有するセメント系硬化剤を使用した造型時
の作業性が良く、かつ鋳造後の鋳型の崩壊性を損なうこ
とがなかった。Although it is possible to use an inorganic material such as gypsum (calcium sulfate) or an ethyl silicate hydrolyzate as a hardener for the solid mold, as a result of various experiments conducted by the inventors, a cement hardener having a quick-setting property was found. The workability during molding used was good, and the collapsibility of the mold after casting was not impaired.
該硬化剤の好適な配合量は、鋳型骨材に対し１５〜３０
重量％であり、第２表にＪＩＳ−Ｒ５２０２に準じて分
析した結果を示した。また、ソリッドモールドに適用す
る鋳型材料は、真土型或は石膏鋳型用の中子としても使
用できるが、とくにセラミックシエルモールドにおける
複雑形状及び中子除去の困難な形状の中子材料として好
適である。The preferable amount of the curing agent is 15 to 30 with respect to the mold aggregate.
The content is% by weight, and Table 2 shows the results of analysis according to JIS-R5202. Further, the mold material applied to the solid mold can be used as a core for a true earth type or a gypsum mold, but it is particularly suitable as a core material having a complicated shape in the ceramic shell mold and a shape in which core removal is difficult. is there.
ソリッドモールドに含有する貝化石粉末７重量％より少
ないと、鋳造後の鋳型の崩壊性が悪いために該粉末の含
有量を７重量％以上に限定した。If the amount of the fossil shell powder contained in the solid mold is less than 7% by weight, the disintegration property of the mold after casting is poor, so the content of the powder was limited to 7% by weight or more.
貝化石粉末の含有量増加とともに、焼成過程における酸
化カルシウム生成量が増え、鋳型の崩壊性は良好となる
が、鋳型の耐火物中に貝化石粉末が８５重量％を超える
と、焼成過程において鋳型の熱収縮により鋳造品の寸法
精度が損なわれる。As the content of shell fossil powder increases, the amount of calcium oxide produced during the firing process increases and the disintegration of the mold becomes better, but if the shell fossil powder exceeds 85% by weight in the refractory material of the mold, Due to the heat shrinkage, the dimensional accuracy of the cast product is impaired.
これは、ソリッドモールドのみならずセラミックシエル
モールドにおいても同様な傾向が認められた。このた
め、貝化石粉末の添加・配合量は７重量％以上８５重量
％以下に限定した。The same tendency was observed not only in the solid mold but also in the ceramic shell mold. For this reason, the amount of added and blended fossil shell powder is limited to 7% by weight or more and 85% by weight or less.
焼成温度が７６０℃より低いと、貝化石粉末中の炭酸カ
ルシウムの熱分解が十分に進行せず、鋳型の崩壊性が損
なわれる。焼成温度７６０℃以上であれば特に問題はな
いが、焼成時間と経済性の観点から、通常は１０００℃
以下で行う。If the firing temperature is lower than 760 ° C., the thermal decomposition of calcium carbonate in the shell fossil powder will not proceed sufficiently and the disintegration property of the mold will be impaired. There is no particular problem if the firing temperature is 760 ° C or higher, but from the viewpoint of firing time and economy, it is usually 1000 ° C.
Do the following:
本発明に使用する耐火物としては、珪砂、シャモット、
溶融シリカ、ジルコン、アルミナ、ムライト、その他熱
的・化学的に比較的安定な耐火物材料である。The refractory used in the present invention includes silica sand, chamotte,
Fused silica, zircon, alumina, mullite and other thermally and chemically stable refractory materials.
通常、精密鋳造法における鋳型用耐火物材料の粒度構成
は、鋳肌精度、耐スポーリング性、通気性、寸法精度
等、の諸性質を満たすために、１０メッシュから４００
メッシュまでの粒度範囲に調整されている。貝化石粉末
の粒度は、１０メッシュより大きいと鋳肌精度が悪く、
４００メッシュより小さいと鋳型の通気性が損なわれ、
鋳造欠陥が生じ易い。それ故、本発明に用いる貝化石粉
末の粒度範囲を１０〜４００メッシュとした。Usually, the particle size composition of the refractory material for a mold in the precision casting method is 10 mesh to 400 to satisfy various properties such as casting surface accuracy, spalling resistance, air permeability, and dimensional accuracy.
It is adjusted to the particle size range up to the mesh. If the particle size of the shell fossil powder is larger than 10 mesh, the casting surface accuracy will be poor,
If it is smaller than 400 mesh, the air permeability of the mold will be impaired,
Casting defects are likely to occur. Therefore, the particle size range of the shell fossil powder used in the present invention is set to 10 to 400 mesh.
貝化石粉末を含有する中子は押し出し或は流し込み等に
よって造型でき、該中子にワックス或はポリスチレン等
の溶融可能な模型材料で被覆し、通例のプロセスによる
セラミックシエルモールドを製作し、鋳造後に鋳型を適
度に冷却させ、注水もしくは水中に浸漬することによっ
て中子は速やかに崩壊する。The core containing the shell fossil powder can be molded by extrusion or pouring, and the core is coated with a meltable model material such as wax or polystyrene, and a ceramic shell mold is manufactured by a usual process, and after casting, The core is promptly disintegrated by cooling the mold appropriately and pouring water or immersing it in water.
（実施例） 以下、本発明の実施例について説明する。(Example) Hereinafter, the Example of this invention is described.
実施例１ 本発明によるセラミックシエルモールドは次のような手
順によって製作する。Example 1 A ceramic shell mold according to the present invention is manufactured by the following procedure.
（１）粒度３２５メッシュ以下の貝化石粉末、もしくは
その他耐火物粉末と貝化石粉末の混合したものをフイラ
ー材とし、粘結剤であるコロイダルシリカ（ＳｉＯ２１
０〜２０重量％）に前記フイラー材を添加・配合し、一
次及び二次スラリーを作成する。(1) Shell fossil powder having a particle size of 325 mesh or less, or a mixture of other refractory powder and shell fossil powder is used as a filler material, and colloidal silica (SiO 2 1
(0 to 20% by weight), and the filler is added and blended to prepare primary and secondary slurries.
（２）一次スラリー粘度をZahn Cup No.5で45〜50secと
し、またZahn Cup No.4で25〜330secとして二次スラリ
ーを調整する。(2) The primary slurry viscosity is adjusted to 45 to 50 seconds in Zahn Cup No. 5 and 25 to 330 seconds in Zahn Cup No. 4 to adjust the secondary slurry.
（３）ワックス等の溶融可能な模型をスラリーに浸漬
し、模型の周囲に均一に被覆する。(3) A meltable model such as wax is dipped in the slurry to uniformly coat the periphery of the model.
（４）粒度１０〜４８メッシュの貝化石もしくはその他
耐火物をスタッコ材とし、スラリー被覆後の模型に均一
に付着させ、乾燥する。(4) Fossil shell or other refractory having a grain size of 10 to 48 mesh is used as a stucco material and uniformly attached to the slurry-coated model, and dried.
（５）（３）及び（４）を繰り返し行い、所望する厚み
の鋳型を形成し、セラミックシエルモールドを製作す
る。(5) The steps (3) and (4) are repeated to form a mold having a desired thickness, and a ceramic shell mold is manufactured.
このようにして製作したセラミックシエルモールドを、
オートクレーブもしくは急速加熱処理によって、鋳型か
らワックス等の溶融可能な模型を溶出させ、次いで７６
０〜８５０℃の温度域で所定時間、鋳型を焼成してアル
ミニウム、銅合金等の注湯に供する。鋳造後の鋳型を適
度に冷却した後、水中に浸漬もしくは大気中で放置（吸
湿作用）させることにより、鋳型は自己崩壊する。The ceramic shell mold produced in this way,
The meltable model such as wax is eluted from the mold by autoclaving or rapid heat treatment, and then 76
The mold is fired in a temperature range of 0 to 850 ° C. for a predetermined time and used for pouring of aluminum, copper alloy or the like. After the casting mold is appropriately cooled, the mold is self-disintegrated by dipping it in water or leaving it in the atmosphere (absorption function).
また、ソリッドモールド或はセラミックシエルモールド
用の中子は以下の方法で造型する。すなわち、粒度１０
〜４００メッシュの貝化石粉末にその他耐火物粉末を混
合し、実質７重量％以上の炭酸カルシウムを含有するよ
うに調整し、骨材とする。該骨材にセメント系硬化剤を
１５〜３０重量％及び水２５〜３０重量％配合し、泥し
よう状としてゴム型に流し込んで造型する。実施例２〜
７までを以下に示す。The core for solid mold or ceramic shell mold is molded by the following method. That is, grain size 10
˜400 mesh shell fossil powder is mixed with other refractory powder, and adjusted to contain substantially 7% by weight or more of calcium carbonate to obtain an aggregate. A cement-based curing agent is added to the aggregate in an amount of 15 to 30% by weight and water in an amount of 25 to 30% by weight. Examples 2 to
Up to 7 are shown below.
実施例４の中子は、貝化石（炭酸カルシウム７０重量
％）１００重量部、シャモット７００重量部、セメント
系硬化剤２００重量鳴部を混合したものに水３５０重量
部加えて泥しようを作り、ゴム型に流し込んで造型し
た。また、実施例６のソリッドモールドは、貝化石（炭
酸カルシウム４０重量％）１００重量部シャモット１０
０重量部、セメント系硬化剤４０重量部を混合したもの
に水７０重量部を加えて造型し、使用した中子は実施例
４と同様に造型した。 The core of Example 4 was prepared by adding 100 parts by weight of fossil shells (70% by weight of calcium carbonate), 700 parts by weight of chamotte, and 200 parts by weight of cement-based hardening agent to 350 parts by weight of water to make a mud soup. It was cast into a rubber mold and molded. The solid mold of Example 6 is 100 parts by weight of fossil shell (40% by weight of calcium carbonate) chamotte.
70 parts by weight of water was added to a mixture of 0 parts by weight and 40 parts by weight of a cement-based curing agent for molding, and the used core was molded in the same manner as in Example 4.
実施例２〜６までの各鋳型は脱ワックス、焼成工程にお
いて鋳型にクラツクの発生はなかった。In each of the molds of Examples 2 to 6, cracking did not occur in the mold during the dewaxing and firing steps.
実施例２〜５のセラミックシエルモールドを珪砂を用い
てバッキングし、７６０℃で９０分間焼成した後、機械
部品（重量５００ｇ）及び美術工芸品（重量１２００
ｇ）を製造した。また、実施例６のソリッドモールドを
８００℃で２時間焼成し、鋳型温度１５０℃銅合金（Ｂ
Ｃ６種）による前記機械部品を製造した。The ceramic shell molds of Examples 2 to 5 were backed with silica sand and fired at 760 ° C. for 90 minutes, then machine parts (weight 500 g) and arts and crafts (weight 1200).
g) was produced. Further, the solid mold of Example 6 was baked at 800 ° C. for 2 hours, and the mold temperature was 150 ° C. Copper alloy (B
The mechanical parts according to C6) were manufactured.
鋳造後の各鋳型を１００〜２００℃まで冷却し、水中に
浸漬したところ、鋳型は速やかに崩壊した。また、中子
の一部は製品に残留したが、化学変化による体積膨張で
軟化しているため、容易に製品から除去された。各鋳型
による鋳造品に欠陥は生じなかった。When each mold after casting was cooled to 100 to 200 ° C. and immersed in water, the mold rapidly collapsed. A part of the core remained in the product, but it was easily removed from the product because it was softened by the volume expansion due to the chemical change. No defects were found in the cast product of each mold.
実施例７ ２０mm×８５mmの水溶性ワックス模型を埋没した泥し
よう鋳込み用型を、実施例５の方法で製作し、前記ワッ
クスを除去した後、調整されたアルミナ泥しようを該鋳
型に注型した。乾燥後の鋳型を９００℃で仮焼し、空冷
後、高湿度雰囲気中において前記鋳型は自己崩壊し、容
易にセラミックス仮焼体を得ることができた。Example 7 A mud casting mold in which a 20 mm × 85 mm water-soluble wax model was buried was manufactured by the method of Example 5, the wax was removed, and then an adjusted alumina mud was cast into the mold. . The dried mold was calcined at 900 ° C., and after air cooling, the mold self-disintegrated in a high humidity atmosphere, and a ceramic calcined body could be easily obtained.
（発明の効果） 以上述べたように、本発明によれば天然に豊富に産出す
る安価な貝化石粉末を用いることにより、インベストメ
ント鋳造法による精密鋳造品の製造ができ、しかも鋳型
の焼成温度が低く、その上少量の貝化石粉末を通常の耐
火物材料と配合することによっても崩壊性を有する鋳型
ができる。さらに分割する必要のない泥しよう鋳込み用
の成形型として利用でき、何れもその作業性が著しく向
上する。(Effect of the invention) As described above, according to the present invention, by using a cheap fossil shell powder naturally produced abundantly, it is possible to manufacture a precision casting product by the investment casting method, and the firing temperature of the mold is Low, yet low-disintegration molds can be made by blending small amounts of fossil shell powder with conventional refractory materials. It can be used as a molding die for mud casting that does not need to be further divided, and the workability thereof is significantly improved.
第１図は炭酸カルシウムの熱分析図 第２図は貝化石の一例の熱分析図 Figure 1 is a thermal analysis chart of calcium carbonate. Figure 2 is a thermal analysis chart of an example of fossil shellfish.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高野 元栄 富山県高岡市二上町150番地 富山県工業 技術センター内 (56)参考文献 特公 昭49−2655（ＪＰ，Ｂ１) 岩波「理化学辞典」（第３版）岩波書店 （1971年５月20日発行）Ｐ．800右欄下か ら12−11行 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Motoei Takano 150 Nikamicho, Takaoka City, Toyama Prefecture, Toyama Prefectural Industrial Technology Center (56) (3rd edition) Iwanami Shoten (Published May 20, 1971) 800 Rows 12-11 from bottom of right column
Claims (1)
ュ以上の炭酸カルシウムが１０〜９０重量％で残部が珪
砂及び長石その他粘土質組成物である砂質層を形成する
貝化石粉末を７〜８５重量％、珪砂、シャモット、溶融
シリカ、ジルコン、アルミナ、ムライトのうち１種或い
は２種以上を１５〜９３重量％からなる耐火物材料に、
粘結剤を混合することによって鋳型を造型し、７６０℃
以上で焼成することを特徴とする易崩壊性鋳型用組成
物。1. A shell fossil powder that forms a sandy layer containing 10 to 90% by weight of calcium carbonate having a particle size of 10 mesh or less to 400 mesh or more and the rest being silica sand, feldspar or other clayey composition and 7 to 85% by weight. , Silica sand, chamotte, fused silica, zircon, alumina, and mullite as a refractory material consisting of 15 to 93% by weight,
Mold the mold by mixing the binder, 760 ℃
A composition for an easily disintegrating template, which is fired as described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62194765A JPH0636954B2 (en) | 1987-08-04 | 1987-08-04 | Composition for easily disintegrating mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62194765A JPH0636954B2 (en) | 1987-08-04 | 1987-08-04 | Composition for easily disintegrating mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6440135A JPS6440135A (en) | 1989-02-10 |
| JPH0636954B2 true JPH0636954B2 (en) | 1994-05-18 |
Family
ID=16329868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62194765A Expired - Lifetime JPH0636954B2 (en) | 1987-08-04 | 1987-08-04 | Composition for easily disintegrating mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0636954B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010012907A1 (en) | 2009-03-27 | 2010-12-09 | Suzuki Motor Corp., Hamamatsu-Shi | Decayable form and process for its preparation |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7235504B2 (en) | 2001-09-28 | 2007-06-26 | Seiren Co., Ltd. | Three dimensional knitted fabric having unevenness |
| EP1612312A4 (en) | 2003-03-31 | 2007-02-28 | Seiren Co Ltd | Warp knit fabric with steric structure |
| CN108994258B (en) * | 2016-05-13 | 2019-12-24 | 上海万泽精密铸造有限公司 | The preparation method of the shell of the nozzle ring casting of K403 superalloy |
| CN108543911A (en) * | 2018-05-24 | 2018-09-18 | 东营嘉扬精密金属有限公司 | Pure white sand improves investment casting formwork collapsibility technique |
| CN115677327B (en) * | 2022-10-26 | 2023-05-26 | 中国地质大学（武汉） | Water-soluble calcium oxide-based support core for internal flow channel components and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS492655B1 (en) * | 1970-12-30 | 1974-01-22 |
-
1987
- 1987-08-04 JP JP62194765A patent/JPH0636954B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| 岩波「理化学辞典」（第３版）岩波書店（１９７１年５月２０日発行）Ｐ．８００右欄下から１２−１１行 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010012907A1 (en) | 2009-03-27 | 2010-12-09 | Suzuki Motor Corp., Hamamatsu-Shi | Decayable form and process for its preparation |
| US8002017B2 (en) | 2009-03-27 | 2011-08-23 | Suzuki Motor Corporation | Method of manufacturing a collapsible mold |
| DE102010012907B4 (en) * | 2009-03-27 | 2016-03-31 | Suzuki Motor Corp. | Decayable form and process for its preparation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6440135A (en) | 1989-02-10 |
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