JPH0156857B2 - - Google Patents
Info
- Publication number
- JPH0156857B2 JPH0156857B2 JP18467086A JP18467086A JPH0156857B2 JP H0156857 B2 JPH0156857 B2 JP H0156857B2 JP 18467086 A JP18467086 A JP 18467086A JP 18467086 A JP18467086 A JP 18467086A JP H0156857 B2 JPH0156857 B2 JP H0156857B2
- Authority
- JP
- Japan
- Prior art keywords
- model
- polycaprolactone
- wax
- present
- average molecular
- 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
Links
- 239000000463 material Substances 0.000 claims description 10
- 229920001610 polycaprolactone Polymers 0.000 claims description 10
- 239000004632 polycaprolactone Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000000034 method Methods 0.000 description 12
- 239000001993 wax Substances 0.000 description 9
- 238000005495 investment casting Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【発明の詳細な説明】
本発明はインベストメント鋳造法、又はロスト
ワツクス鋳造法等の精密鋳造法に用いられるワツ
クスに代わる、新しい消失模型の製造方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a new method for producing a disappearing model to replace wax used in precision casting methods such as investment casting methods or lost wax casting methods.
インベストメント鋳造法においては従来よりワ
ツクスが用いられていたが、この方法によるとワ
ツクスは、凝固収縮が大きく、又ワツクス成型時
に変形、亀裂、ひけ等の欠陥が発生しやすく、精
密な良い模型を成型するためには、各種ワツクス
の配合とワツクスの収縮、歪みを加味した金型を
作り、射出成型を行う必要があつた。また特公昭
51−20011号公報には、ナフタリン又はパラジク
ロルベンゾールを用いることが示されている。し
かし、これらの従来技術により製作された消失模
型は強度が弱いという欠点があつたし、そのため
大型の模型を得ることが困難であつた。 Wax has traditionally been used in the investment casting method, but with this method, wax has a large solidification shrinkage, and defects such as deformation, cracks, and sink marks are likely to occur during wax molding, and it is difficult to mold a good, precise model. In order to do this, it was necessary to create a mold that takes into account the combination of various waxes and the shrinkage and distortion of the wax, and perform injection molding. Also Tokko Akira
51-20011 discloses the use of naphthalene or paradichlorobenzole. However, the vanishing models produced by these conventional techniques have a drawback of being weak in strength, which makes it difficult to obtain large models.
本発明はこれらの課題を解決し、新しい消失模
型のための材料を提供するものである。即ち本発
明は、数平均分子量が5000から200000のポリカプ
ロラクトンを主体とする重合物を溶融して型に注
入し、凝固させることにより所要の消失模型を得
ることを特徴とする消失模型の製造方法である。 The present invention solves these problems and provides a material for a new vanishing model. That is, the present invention provides a method for producing a vanishing model, characterized in that a desired vanishing model is obtained by melting a polymer mainly composed of polycaprolactone and having a number average molecular weight of 5,000 to 200,000, injecting the melted material into a mold, and solidifying it. It is.
本発明に用いるポリカプロラクトンは低融点を
有し、高い強度に優れ、しかも可撓性がある。こ
れは例えば特願昭54−126221号（特開昭56−
49728号公報）で開示された方法で製造できる。
本発明に用いて好適なポリカプロラクトンは数平
均分子量が5000〜200000である。このポリカプロ
ラクトンに更に望むならば、ポリエチレン、ポリ
塩化ビニル、ABSやEVAなどの熱可塑性樹脂を
50重量パーセントまで添加することができる。ま
た、ポリカプロラクトンには、安定剤や分解防止
剤が添加できる。以上述べた材料を用いて消失模
型を製造すると強度に優れた大型模型を得ること
ができる。 The polycaprolactone used in the present invention has a low melting point, high strength, and flexibility. For example, this can be seen in Japanese Patent Application No. 126221/1983 (Japanese Patent Application No.
It can be produced by the method disclosed in Japanese Patent Publication No. 49728).
Polycaprolactone suitable for use in the present invention has a number average molecular weight of 5,000 to 200,000. If you want more from this polycaprolactone, you can add thermoplastic resins such as polyethylene, polyvinyl chloride, ABS and EVA.
Up to 50% by weight can be added. Further, a stabilizer and a decomposition inhibitor can be added to polycaprolactone. If a vanishing model is manufactured using the materials described above, a large model with excellent strength can be obtained.
最近の傾向として、精密鋳造品の大きさが次第
に大型化する傾向がある。製品が大型化すればす
る程、模型も大きくなり、それに比例して模型材
料の強度の高いものが要求される。処が一般に使
用されているワツクスの抗折力は１〜２Kg／cm2
で、本発明のポリカプロラクトンは非常に大きい
抗折力をもつており、従つて普通の精密鋳造品の
模型材料とすれば、充分の強度を持つものであ
る。 As a recent trend, there is a tendency for precision casting products to gradually increase in size. The larger the product, the larger the model, and proportionately stronger model materials are required. The transverse rupture strength of wax commonly used is 1 to 2 kg/cm 2
The polycaprolactone of the present invention has a very large transverse rupture strength, and therefore has sufficient strength when used as a model material for ordinary precision castings.
以上の通り本発明の模型材料は、ワツクス模型
に比べて強度が非常に高く、蒸気タービン翼、ガ
スタービン翼の製造、シエル用金型、プレス用金
型等の金型の製造、その他一般精密鋳造品の製造
に当つて用いる、消失模型の製造方法として極め
て優れたものである。 As described above, the model material of the present invention has extremely high strength compared to wax models, and can be used for manufacturing steam turbine blades, gas turbine blades, manufacturing molds such as shell molds and press molds, and other general precision molds. This is an extremely excellent method for producing vanishing models used in the production of cast products.
本発明の模型材料に耐火物スラリーの被覆を施
す方法は、一般にロストワツクス法で用いられて
いる方法と同様で、耐火物スラリーを模型に被覆
して、乾燥する操作を数回繰り返して、約５〜10
mmの厚さのシエルを作る。 The method of coating the model material of the present invention with refractory slurry is similar to the method generally used in the lost wax method, in which the refractory slurry is coated on the model and drying is repeated several times. ~Ten
Make a shell with a thickness of mm.
模型の消失は、耐火物シエルを被覆した模型を
そのまま熱湯中に浸漬するか、又は高温度の雰囲
気中にて急激に加熱する事により簡単に消失させ
る事ができる。又本発明方法に用いる材料は加熱
による劣化現象が全くなく、溶融流出した模型材
料は、すべて再使用が可能であることも特徴であ
る。 The model can be easily disappeared by immersing the model coated with a refractory shell in hot water or by rapidly heating it in a high temperature atmosphere. Another feature of the material used in the method of the present invention is that there is no deterioration phenomenon caused by heating, and all of the melted and flowed model material can be reused.
次に本発明の実施例について述べる。 Next, embodiments of the present invention will be described.
実施例 １
数平均分子量が40000のポリカプロラクトンを
80〜85℃に加熱溶融し、これを長さ約500mmのタ
ービン翼の石膏型に加圧注入した。模型の完全凝
固後、抜型した結果、模型の収縮は極めて少な
く、反りは全く認められなかつた。又、衝撃に対
して優れた強度を示した。これに耐火物スラリー
を数回被覆乾燥を繰り返した後、熱湯中に浸漬し
た所、約５分で模型の外周が溶解流出して、残在
模型をシエルから抜き出す事が出来た。このシエ
ルを焼成後、直ちに18−８ステンレス溶湯を鋳造
した結果、表面欠陥のない良好な鋳物を得た。Example 1 Polycaprolactone with a number average molecular weight of 40,000
It was heated and melted at 80-85°C and injected under pressure into a plaster mold of a turbine blade approximately 500 mm in length. After the model was completely solidified, it was removed from the mold, and the shrinkage of the model was extremely small and no warpage was observed. It also showed excellent strength against impact. After coating the refractory slurry several times and drying it, it was immersed in hot water, and the outer periphery of the model melted and flowed out in about 5 minutes, allowing the remaining model to be extracted from the shell. Immediately after firing this shell, molten 18-8 stainless steel was cast, resulting in a good casting with no surface defects.
実施例 ２
数平均分子量5000のポリカプロラクトンを用い
た以外は実施例１と同様に行い、実施例１と同様
の結果を得た。Example 2 The same procedure as in Example 1 was carried out except that polycaprolactone having a number average molecular weight of 5000 was used, and the same results as in Example 1 were obtained.
実施例 ３
数平均分子量10000のポリカプロラクトンを用
いた以外は実施例１と同様に行い、実施例１と同
様の結果を得た。Example 3 The same procedure as in Example 1 was carried out except that polycaprolactone having a number average molecular weight of 10,000 was used, and the same results as in Example 1 were obtained.
Claims (1)
ラクトンを主体とする重合物を溶融して型に注入
し、凝固させることにより所要の消失模型を得る
ことを特徴とする消失模型の製造方法。1. A method for producing a vanishing model, which comprises obtaining a desired vanishing model by melting a polymer mainly composed of polycaprolactone and having a number average molecular weight of 5,000 to 200,000, injecting the melted material into a mold, and solidifying it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18467086A JPS6250043A (en) | 1986-08-06 | 1986-08-06 | Production of consumable pattern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18467086A JPS6250043A (en) | 1986-08-06 | 1986-08-06 | Production of consumable pattern |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6250043A JPS6250043A (en) | 1987-03-04 |
| JPH0156857B2 true JPH0156857B2 (en) | 1989-12-01 |
Family
ID=16157306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18467086A Granted JPS6250043A (en) | 1986-08-06 | 1986-08-06 | Production of consumable pattern |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6250043A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3464537B2 (en) * | 1994-08-26 | 2003-11-10 | ダイセル化学工業株式会社 | Polymer composition |
-
1986
- 1986-08-06 JP JP18467086A patent/JPS6250043A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6250043A (en) | 1987-03-04 |
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