JP4722988B2 - Materials for modeling, functional agents, modeling products and products - Google Patents
Materials for modeling, functional agents, modeling products and products Download PDFInfo
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- JP4722988B2 JP4722988B2 JP2008287467A JP2008287467A JP4722988B2 JP 4722988 B2 JP4722988 B2 JP 4722988B2 JP 2008287467 A JP2008287467 A JP 2008287467A JP 2008287467 A JP2008287467 A JP 2008287467A JP 4722988 B2 JP4722988 B2 JP 4722988B2
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- 239000000463 material Substances 0.000 title claims description 32
- 239000003795 chemical substances by application Substances 0.000 claims description 32
- 239000002243 precursor Substances 0.000 claims description 29
- 239000004576 sand Substances 0.000 claims description 25
- 239000004568 cement Substances 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000003475 lamination Methods 0.000 claims description 11
- 239000011230 binding agent Substances 0.000 claims description 10
- 239000002274 desiccant Substances 0.000 claims description 3
- 239000003755 preservative agent Substances 0.000 claims description 3
- 230000002335 preservative effect Effects 0.000 claims description 3
- 210000004556 brain Anatomy 0.000 claims description 2
- 238000005266 casting Methods 0.000 description 14
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 229910052602 gypsum Inorganic materials 0.000 description 8
- 239000010440 gypsum Substances 0.000 description 8
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000004115 Sodium Silicate Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 229910052911 sodium silicate Inorganic materials 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 239000002518 antifoaming agent Substances 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
- 239000012530 fluid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000003870 refractory metal Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 241000282320 Panthera leo Species 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 210000000476 body water Anatomy 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Description
本発明は、造形用材料、機能剤、造形製品及び製品に関し、特に、粉末固着積層法における造形用材料、機能剤、造形製品及び製品に関する。 The present invention relates to a modeling material, a functional agent, a molded product, and a product, and particularly relates to a modeling material, a functional agent, a molded product, and a product in a powder fixing lamination method.
従来、三次元製品の横断面部分を形成し、そしてそれぞれの横断面領域を層方向に集合させて、鋳型を製造する手法がある。この手法では、それぞれの横断面領域は、鋳造砂とそのバインダーとして機能することになる多量の鉱物石膏を含有したプラスターとを含む粒状材料に、水性流体を供給するインク‐ジェットプリントヘッドを用いて形成される。この種の鋳型製造手法は、粉末固着積層法と称されている（特許文献１）。 Conventionally, there is a method of manufacturing a mold by forming a cross-sectional portion of a three-dimensional product and collecting the respective cross-sectional areas in the layer direction. In this approach, each cross-sectional area is used with an ink-jet printhead that supplies an aqueous fluid to a particulate material that includes casting sand and a plaster containing a large amount of mineral gypsum that will serve as its binder. It is formed. This type of mold manufacturing method is referred to as a powder fixing lamination method (Patent Document 1).
ここで、石膏が１０００℃程度の温度で加熱されると、石膏の主成分である硫酸カルシウムが熱分解され、亜硫酸ガスが発生する。したがって、引用文献１に開示されている技術に対して、融点が１０００℃を超える材料（たとえば、高融点金属）を鋳物材料とした場合には、これに接した鋳型が過熱され亜硫酸ガスなどが発生する。この結果、鋳物に気泡巣などの欠陥が生じてしまう。したがって、現実的には、石膏を用いて製造された鋳型に対して使用可能な鋳物材料は限定的であった。 Here, when gypsum is heated at a temperature of about 1000 ° C., calcium sulfate, which is the main component of gypsum, is thermally decomposed to generate sulfurous acid gas. Therefore, in contrast to the technique disclosed in the cited document 1, when a material having a melting point exceeding 1000 ° C. (for example, a refractory metal) is used as a casting material, the mold in contact with the material is overheated to generate sulfurous acid gas or the like. appear. As a result, defects such as bubble nests occur in the casting. Therefore, in reality, there are limited casting materials that can be used for molds manufactured using gypsum.
そこで、本発明は、融点が１０００℃を超えるような高融点金属でも注湯可能な粉末固着積層法における造形用材料、及び、それを用いて製造される造形製品（たとえば、鋳型）、さらには、当該造形製品を成形型として用いて製造された製品（たとえば、鋳物）を提供することを課題とする。 Therefore, the present invention relates to a material for modeling in the powder fixed lamination method that can be poured even with a high melting point metal having a melting point exceeding 1000 ° C., and a modeled product (for example, a mold) manufactured using the material. An object of the present invention is to provide a product (for example, a casting) manufactured using the shaped product as a mold.
上記課題を解決するために、本発明の粉末固着積層法における造形用材料は、骨材と当該骨材を結着させるバインダーの粉状前駆体とが混合されてなる、粉末固着積層法における造形用材料であって、前記骨材が７０重量％以上であり、前記粉状前駆体がセメント又は耐熱性を有する樹脂である。 In order to solve the above problems, the modeling material in the powder fixing lamination method of the present invention is a modeling in the powder fixing lamination method in which an aggregate and a powdery precursor of a binder that binds the aggregate are mixed. The aggregate is 70 wt% or more, and the powdery precursor is cement or a resin having heat resistance.
すなわち、本発明によれば、石膏に代わる粉状前駆体を選択することによって、融点が１０００℃を超えるような高融点金属などを注湯しても、その温度に耐えうる造形製品を製造することが可能となる。 That is, according to the present invention, by selecting a powdery precursor that replaces gypsum, a shaped product that can withstand that temperature even when pouring a refractory metal having a melting point exceeding 1000 ° C. is manufactured. It becomes possible.
なお、本発明の造形用材料を用いて製造された造形製品（たとえば、鋳型）、さらには、当該造形製品を成形型として用いて製造された製品（たとえば、鋳物）も、本発明の権利範囲に含まれるものとする。 Note that a shaped product (for example, a mold) manufactured using the modeling material of the present invention, and a product (for example, a casting) manufactured using the shaped product as a mold are also covered by the scope of the present invention. Shall be included.
また、本発明の機能剤は、骨材と当該骨材を相互に結着させるバインダーの粉状前駆体とが混合されてなる、粉末固着積層法における造形用材料とともに用いられ、前記粉状前駆体をバインダーに変質させるものである。 Further, the functional agent of the present invention is used together with a modeling material in a powder fixing lamination method in which an aggregate and a powdered precursor of a binder that binds the aggregate to each other are mixed, and the powdered precursor It transforms the body into a binder.
この機能剤には、さらに、防腐剤、消泡剤、乾燥剤の少なくともいずれかを含めてもよい。 This functional agent may further contain at least one of a preservative, an antifoaming agent and a desiccant.
以下、本発明の実施形態について説明する。本実施形態の造形用材料及び機能剤は、粉末固着積層法を採用した、ラピッドプロトタイプの立体造形物製造装置に用いられるものである。立体造形物製造装置は、例えば、Ｚコーポレーション社のSpectrumZ310-3DPrinter、EX ONE社のPrometal-S15を用いることができる。 Hereinafter, embodiments of the present invention will be described. The modeling material and the functional agent of the present embodiment are used in a rapid prototype three-dimensional model manufacturing apparatus that employs a powder fixing lamination method. As the three-dimensional structure manufacturing apparatus, for example, Spectrum Z310-3DPrinter manufactured by Z Corporation and Prometal-S15 manufactured by EX ONE can be used.
１．造形用材料について
本実施形態の造形用材料は、粉末固着積層法において好適に用いることができるものである。この造形用材料は、平均径が１０μｍ〜９０μｍ以下の骨材を備える。骨材の平均径は、この範囲とすることが必須ではないが、この範囲内の大きさの骨材は、積層不良が生じにくいという利点がある。本実施形態の造形用材料を用いて鋳型を製造した場合には、骨材として鋳物砂を採用することが考えられるが、その平均径は、好ましくは、鋳肌の品質と溶融金属を注湯時に発生するガスの通気性とを考慮して、鋳物砂の平均径を２０μｍ〜７５μｍとするとよい。
1. About modeling material The modeling material of this embodiment can be used suitably in the powder fixed lamination method. This modeling material includes an aggregate having an average diameter of 10 μm to 90 μm. The average diameter of the aggregate is not necessarily in this range, but an aggregate having a size within this range has an advantage that poor stacking is unlikely to occur. When a mold is manufactured using the modeling material of the present embodiment, it is conceivable to employ foundry sand as an aggregate, but the average diameter is preferably poured into the casting surface quality and molten metal. Considering the gas permeability generated sometimes, the average diameter of the foundry sand is preferably 20 μm to 75 μm.
鋳物砂は、成分の観点からすれば、天然鋳物砂であってもよいし、セラミックスなどの人工鋳物砂であってもよい。ただし、人工鋳物砂の方が、平均径の大きさにばらつきがなく、低熱膨張化、粉状前駆体の高充填性が得られるという点で好ましい。特に、人工鋳物砂は、真球形に近いので、下記の粉状前駆体との混合をさせやすいという効果がある。 From the viewpoint of the components, the foundry sand may be natural foundry sand or artificial foundry sand such as ceramics. However, artificial casting sand is preferable in that the average diameter has no variation, low thermal expansion and high filling property of the powdery precursor can be obtained. In particular, since artificial sand is nearly spherical, there is an effect that it can be easily mixed with the following powdery precursor.
また、鋳物砂は、新砂のみならず、再生砂を用いることもできる。本実施形態において好適に用いられる鋳物砂は、市販品としては、ルナモス（花王クエーカー社製）、アルサンド（群栄ボーデン社製）、ナイガイセラビーズ（伊藤忠セラテック社製）、ジルコンサンド、クロマイトサンドなどを用いることができる。鋳物砂は、様々な粒径のものを用いると、石垣効果により下記の粉状前駆体と混合させ易いという効果があるので、粒径分布に広がりを持たせるとよく、このためには、混合砂を用いることも一法である。 Further, as the foundry sand, not only fresh sand but also recycled sand can be used. As for the foundry sand suitably used in the present embodiment, commercially available products include Lunamos (manufactured by Kao Quaker), Arsand (manufactured by Gunei Borden), Niiga Cera beads (manufactured by ITOCHU CERATECH), zircon sand, chromite sand and the like. Can be used. When casting sand having various particle sizes is used, there is an effect that it is easy to mix with the following powdery precursor due to the stone wall effect. Therefore, it is desirable to widen the particle size distribution. It is also possible to use sand.
また、本実施形態の造形用材料は、耐熱性を有する粉状前駆体を備える。この粉状前駆体には、例えば、セメント、フラン、フェノール、アルキッドなどの樹脂を用いることができる。ここでいう耐熱性とは、鋳物の製造についていえば、鋳物材料を鋳型に注湯したときに、鋳物材料と鋳型との接触面で所要のシェルが形成されるという条件を満たすものをいう。したがって、必ずしも、粉状前駆体の融点が、１０００℃を超える必要はない。 Moreover, the modeling material of the present embodiment includes a powdery precursor having heat resistance. For example, a resin such as cement, furan, phenol, or alkyd can be used as the powdery precursor. The term “heat resistance” as used herein refers to a material that satisfies the condition that a required shell is formed at the contact surface between the casting material and the mold when the casting material is poured into the mold. Therefore, the melting point of the powdery precursor does not necessarily need to exceed 1000 ° C.
なお、セメントの場合には、ブレーン比表面積値が大きいほど、セメントの粒径が小さく、水和反応が促進されやすいし、ブリージング量も減少する。また、ブレーン比表面積値が大きいほど、初期強度が大きい。したがって、本実施形態の場合には、ブレーン比表面積値が大きいほど好ましい。一例としては、ブレーン比表面積値は、２５００ｃｍ２／ｇ以上のもの（ポルトランドセメントなど）、好ましくは、４０００ｃｍ２／ｇ以上のもの（速硬セメントなど）、さらに好ましくは４５００ｃｍ２／ｇ以上のもの（超速硬セメント）を用いればよい。 In the case of cement, the larger the Blaine specific surface area value, the smaller the particle size of the cement, the easier the hydration reaction is promoted, and the amount of breathing also decreases. Further, the larger the Blaine specific surface area value, the greater the initial strength. Therefore, in the case of this embodiment, it is preferable that the brain specific surface area value is large. As an example, the Blaine specific surface area is 2500 cm 2 / g or more of (Portland cement, etc.), preferably, (such as fast curing cement) 4000 cm 2 / g or more of, more preferably 4500cm 2 / g or more of (Super fast cement) may be used.
さらに、造形用材料には、各種調整剤を混合させるとよい。調整剤としては、例えば、後述するように、造形用材料に対して機能剤を噴霧したときに、機能剤の余剰分がその噴霧すべき位置の周辺に染込むことを抑止するものが挙げられる。この種の調整剤を用いると、鋳型の解像度を向上させることができ、ひいては、鋳肌の高品質化を図ることができる。 Furthermore, various adjusting agents may be mixed in the modeling material. As the adjusting agent, for example, as will be described later, when the functional agent is sprayed on the modeling material, an agent that suppresses the surplus of the functional agent from permeating around the position to be sprayed is exemplified. . When this type of adjusting agent is used, the resolution of the mold can be improved, and as a result, the quality of the casting surface can be improved.
また、この種の調整剤を用いると、機能剤の余剰分の存在によって、溶融金属を注湯時に発生するガスを減少させることができるので、当該ガスによって鋳物に欠陥が生じることを防止することが可能となる。調整剤は、鋳物砂又は粉状前駆体の種別に応じたものを選択すればよい。 Moreover, when this type of adjusting agent is used, the presence of excess functional agent can reduce the gas generated during pouring of molten metal, thus preventing the casting from causing defects in the casting. Is possible. What is necessary is just to select the adjusting agent according to the kind of foundry sand or a powdery precursor.
例えば、粉状前駆体がセメントの場合には、機能剤本体として水を用いることになるが、この場合には、調整剤として、珪酸ソーダ、ポリビニルアルコール（ＰＶＡ）、カルボキシルメチルセルロース（ＣＭＣ）、デキストリン、或いは、これらの混合物を配合することができる。これにより、機能剤本体であるところの水の余剰分が、珪酸ソーダ等に吸収されることになる。なお、鋳物砂の粒径の大きさに応じて、調整剤の配合割合を適宜選択すればよい。 For example, when the powdery precursor is cement, water is used as the functional agent main body. In this case, as the adjusting agent, sodium silicate, polyvinyl alcohol (PVA), carboxymethyl cellulose (CMC), dextrin Alternatively, a mixture thereof can be blended. Thereby, the surplus of the water which is a functional agent main body will be absorbed by sodium silicate etc. In addition, what is necessary is just to select the mixture ratio of a regulator suitably according to the magnitude | size of the particle size of foundry sand.
鋳物砂と粉状前駆体との混合割合を例示すると、本実施形態では、例えば、鋳物砂として人工鋳物砂を用い、粉状前駆体として止水セメントを用い、水分調整剤として珪酸ソーダを用いた場合には、これらを約７０重量％：２５重量％：５重量％で混合すればよい。ここで、一般的には、超速硬セメントが２５重量％を超えると、止水セメント内の石膏成分によるガス欠陥が生じ易くなる。実際に、超速硬セメントとして住友大阪セメント社の「ライオン止水」という商品を用いた場合には、止水セメントが２０重量％を超えると、止水セメント内の石膏成分によるガス欠陥が生じ易くなった。したがって、超速硬セメントの混合割合は、２５重量％以下とするとよい。 When the mixing ratio of the foundry sand and the powdered precursor is exemplified, in this embodiment, for example, artificial cast sand is used as the foundry sand, water-stopping cement is used as the powdered precursor, and sodium silicate is used as the moisture adjusting agent. In such a case, these may be mixed at about 70% by weight: 25% by weight: 5% by weight. Here, in general, when the super-hard cement exceeds 25% by weight, gas defects due to the gypsum component in the water-stopping cement tend to occur. In fact, when a product called “Lion water stop” from Sumitomo Osaka Cement Co., Ltd. is used as the super fast cement, if the water stop cement exceeds 20% by weight, gas defects due to the gypsum component in the water stop cement are likely to occur. became. Therefore, the mixing ratio of the ultrafast cement is preferably 25% by weight or less.
造形用材料の製造は限定的でなく、鋳物砂と粉状前駆体と調整剤とが十分に攪拌されさえすればよい。したがって、例えば、約１００ｋｇの造形用材料を製造する場合には、鋳物砂を約８０ｋｇと、粉状前駆体を約１５ｋｇと、調整剤を約５ｋｇ用意し、これらを攪拌器にセットして適宜攪拌すればよい。 The manufacturing of the modeling material is not limited, and it is sufficient that the foundry sand, the powdery precursor, and the adjusting agent are sufficiently stirred. Therefore, for example, when manufacturing a modeling material of about 100 kg, about 80 kg of foundry sand, about 15 kg of a powdered precursor, and about 5 kg of a regulator are prepared, and these are set in a stirrer as appropriate. What is necessary is just to stir.
２．機能剤について
本実施形態の機能剤は、造形用材料の鋳物砂を相互に結着させるように、粉状前駆体をバインダーに変質させるものであればよい。したがって、機能剤は、例えば、粉状前駆体としてセメントを用いる場合には水を含むもの、樹脂を用いる場合には当該樹脂を硬化させるもの（例えば、水系樹脂硬化剤）とすることができる。もっとも、樹脂を用いた場合には、ノズルからの水系樹脂硬化剤等の噴霧に代えて、樹脂硬化用のエネルギー（例えば、熱又は紫外線）を付加してもよい。
2. About a functional agent The functional agent of this embodiment should just change a powdery precursor into a binder so that the molding sand of modeling material may mutually bind. Therefore, the functional agent can be, for example, one containing water when cement is used as the powdery precursor, or one that cures the resin when using resin (for example, an aqueous resin curing agent). However, when resin is used, instead of spraying a water-based resin curing agent or the like from the nozzle, energy for resin curing (for example, heat or ultraviolet light) may be added.
ここで、粉状前駆体としてセメントを用いる場合には、原理的には、水のみをバインダーとすればよいが、水とその噴霧手段（ノズルヘッド）との間の摩擦により、当該噴霧手段が発熱することがある。粉状前駆体としてセラミックス等を用いる場合も同様である。さらに、粉状前駆体としてセラミックス等を用いる場合には、ノズルヘッドの目詰まりを抑止する必要もある。そこで、この発熱に対応すべく、機能剤には、温度上昇を抑止する抑止剤及び／又は機能剤本体の表面張力を調整する界面活性剤を混合するとよい。 Here, in the case of using cement as the powder precursor, in principle, only water may be used as a binder, but the spraying means is caused by friction between water and the spraying means (nozzle head). May generate heat. The same applies when ceramics or the like is used as the powdery precursor. Further, when ceramics or the like is used as the powdery precursor, it is necessary to suppress clogging of the nozzle head. Therefore, in order to cope with this heat generation, the functional agent may be mixed with a deterring agent that suppresses temperature rise and / or a surfactant that adjusts the surface tension of the functional agent body.
機能剤本体に対する抑止剤等の混合割合は、例えば、粉状前駆体としてセメントを用いる場合であって、噴霧手段としてヒューレット・パッカード社のカートリッジＨｐ１１を用いる場合には、機能剤本体である水が９０容量％〜９５容量％（例えば９４容量％）、抑止剤としてのグリセリンを４容量％〜１０容量％（例えば５容量％）、界面活性剤を１容量％〜２容量％（例えば１容量％）とすればよい。さらに、このバインダーには、保存性、作業性などを考慮して、選択的に、防腐剤、消泡剤、乾燥剤などを含めてもよい。 The mixing ratio of the inhibitor to the functional agent main body is, for example, when cement is used as the powdery precursor, and when the cartridge Hewlett Packard cartridge Hp11 is used as the spraying means, the functional agent main body water is used. 90% to 95% by volume (for example, 94% by volume), 4% to 10% by volume (for example, 5% by volume) of glycerin as a deterrent, and 1% to 2% by volume (for example, 1% by volume) of a surfactant. )And it is sufficient. Further, the binder may optionally contain a preservative, an antifoaming agent, a desiccant and the like in consideration of storage stability and workability.
以上説明したように、本実施形態では、石膏に代わる粉状前駆体を選択して、粉末固着積層法における造形用材料を構成している。このため、融点が１０００℃を超えるような高融点金属を注湯しても、その温度に耐えうる鋳型を得ることが可能となる。 As described above, in the present embodiment, a powdery precursor that replaces gypsum is selected to constitute a material for modeling in the powder fixing lamination method. For this reason, even if a high melting point metal having a melting point exceeding 1000 ° C. is poured, a mold that can withstand that temperature can be obtained.
本実施形態では、主として、鋳型を製造する場合を例に説明したが、鋳型のみならず他の成形型、例えば、樹脂系、ガラス系、又は、ゴム系などの流動硬化性材料を使用した成形型を製造することもできる。 In the present embodiment, the case where a mold is mainly manufactured has been described as an example. However, not only the mold but also other molds, for example, molding using a fluid curable material such as a resin system, a glass system, or a rubber system. Molds can also be manufactured.
Claims (5)
前記骨材は人工鋳物砂であり、
前記粉状前駆体は、ブレーン比表面積値が４０００ｃｍ ２ ／ｇ以上のセメントである造形用材料。 A material for modeling in the powder fixing lamination method, in which an aggregate and a powdery precursor of a binder that binds the aggregate to each other are mixed,
The aggregate is artificial foundry sand,
The powdery precursor is a modeling material that is a cement having a Blaine specific surface area value of 4000 cm 2 / g or more .
前記骨材は人工鋳物砂であり、
前記粉状前駆体は、ブレーン比表面積値が４０００ｃｍ ２ ／ｇ以上のセメントである機能剤。 A functional agent that is used together with a material for modeling in the powder fixing lamination method, in which an aggregate and a powder precursor of a binder that binds the aggregate to each other are mixed, and transforms the powder precursor into a binder There,
The aggregate is artificial foundry sand,
The said powdery precursor is a functional agent which is a cement whose brain specific surface area value is 4000 cm < 2 > / g or more.
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