JPS625706B2 - - Google Patents
Info
- Publication number
- JPS625706B2 JPS625706B2 JP10024478A JP10024478A JPS625706B2 JP S625706 B2 JPS625706 B2 JP S625706B2 JP 10024478 A JP10024478 A JP 10024478A JP 10024478 A JP10024478 A JP 10024478A JP S625706 B2 JPS625706 B2 JP S625706B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- heating
- metal frame
- temperature
- heated
- 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
- 238000010438 heat treatment Methods 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 10
- 239000011819 refractory material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 description 12
- 238000005266 casting Methods 0.000 description 7
- 230000007547 defect Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
Landscapes
- Continuous Casting (AREA)
- Casting Devices For Molds (AREA)
Description
【発明の詳細な説明】
この発明は鋳型加熱方法に係り、鋳型温度を容
易かつ確実に高温に加熱できると共に、金枠内で
同時に加熱した後、バツクアツプ材を使用するこ
とによつて鋳型の温度降下を防止し、以つて、小
型可変ピツチプロペラ、タービンブレード等の薄
肉形状鋳物においてもピンホール、ブローホール
等の鋳造欠陥が生じるのを阻止したことを目的と
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for heating a mold, in which the temperature of the mold can be easily and reliably heated to a high temperature. The object is to prevent the casting defects such as pinholes and blowholes from occurring even in thin-walled castings such as small variable pitch propellers and turbine blades.
各種鋳造技術において、鋳型を加熱することは
既知である。 It is known in various casting techniques to heat the mold.
従来では、鋳型を電気炉に装入して加熱した
後、炉内より取出し、この加熱された鋳型を金枠
に設置して粒径の小さなサンド等のバツクアツプ
材でバツクアツプせしめ、その後、溶解場に運搬
しているのが通例である。 Conventionally, a mold is charged into an electric furnace and heated, then taken out from the furnace, and the heated mold is placed in a metal frame and backed up with a back-up material such as sand with a small particle size, and then placed in a melting field. It is customary for them to be transported to
この従来法によると、電気炉の炉内における温
度差があるし、また、炉内取出作業および金枠内
セツト作業のとき、折角加熱された鋳型の温度降
下が生じるし、加えて、バツクアツプ材として粒
径の小さなサンド等を使用していることから、鋳
型より吸熱して鋳型温度が降下し、従つて、鋳造
製品にピンホール、ブローホール等の鋳造欠陥が
生じている場合もあつた。 According to this conventional method, there is a temperature difference inside the electric furnace, and the temperature of the heated mold decreases when taking the mold out of the furnace and setting it in the metal frame. Since sand or the like with small particle size is used as the casting material, heat is absorbed from the mold and the temperature of the mold drops, resulting in casting defects such as pinholes and blowholes in some cases.
本発明者等は上記実状に鑑み、鋭意研究の成果
として、加熱手段を有する金枠内に鋳型を設置
し、この鋳型を前記加熱手段で所定温度まで直接
的に加熱した後、鋳型と金枠との間に粒径が50〜
80mmφの球状の耐火物をバツクアツプ材として充
填することを特徴とする鋳型加熱方法の開発に成
功したものである。 In view of the above-mentioned circumstances, the inventors of the present invention have conducted extensive research and have installed a mold in a metal frame equipped with a heating means, directly heated the mold to a predetermined temperature with the heating means, and then removed the mold and the metal frame. The particle size between
We have successfully developed a mold heating method characterized by filling 80mmφ spherical refractories as backup material.
従つて、本発明によれば、鋳型を金枠内で直接
的に加熱することから鋳型温度を所定の温度まで
容易かつ確実に加熱できると共に、加熱後に鋳型
の取出し作業、セツト作業が不要であることに基
き、鋳型温度降下が防止できるのである。 Therefore, according to the present invention, since the mold is heated directly within the metal frame, the mold temperature can be easily and reliably heated to a predetermined temperature, and there is no need to take out or set the mold after heating. Based on this, a drop in mold temperature can be prevented.
また、加熱後にバツクアツプ材として粒径が50
〜80mmφの球状の耐火物を使用することにより、
鋳型よりの吸熱が少なく鋳型温度を所定の加熱温
度に維持できるし、耐火物として粒径50ｍ／ｍφ
のものを採用すれば、そのバツクアツプ効果は抜
群となるのである。 Also, after heating, it can be used as a backup material with a particle size of 50 mm.
By using ~80mmφ spherical refractories,
There is less heat absorption from the mold, and the mold temperature can be maintained at the specified heating temperature, and as a refractory, the particle size is 50 m/mφ
If you adopt this, the back-up effect will be outstanding.
以下、本発明の好適具体例を図面を参照して詳
述する。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
第１図乃至第３図において、１は金枠で、その
内面には耐火レンガその他の耐火ライニング層２
が内張りされている。３は加熱装置で、加熱ボツ
クス４と、ガスバーナ、重油その他の加熱発生手
段５から成り、金枠１の下底部に設けてある。 In FIGS. 1 to 3, 1 is a metal frame, and its inner surface has a refractory lining layer 2 made of refractory brick or other material.
is lined. Reference numeral 3 denotes a heating device, which comprises a heating box 4 and heating generating means 5 such as a gas burner, heavy oil, etc., and is provided at the bottom of the metal frame 1.
加熱ボツクス４には耐火ライニング層６が金枠
１と同様に内張りされており、加熱ボツクス４と
金枠１の底との間には耐火物製のロストル７が設
けられ、該ロストル７には多数の加熱孔８が開設
されている。なお、加熱孔８はバツクアツプ材の
粒径より小径であることが望しい。 The heating box 4 is lined with a refractory lining layer 6 in the same way as the metal frame 1, and a refractory roistle 7 is provided between the heating box 4 and the bottom of the metal frame 1. A large number of heating holes 8 are provided. Note that it is desirable that the diameter of the heating holes 8 is smaller than the particle size of the backup material.
９は鋳型であつて、第１図および第２図に示す
ように押湯部１０を上位として金枠１内に縦向姿
勢で設置されている。この設置に際し、金枠１と
鋳型９は芯合せをした状態で設置されるものと
し、また、金枠１に耐火ライニング層２を設ける
ことにより、鋳型９と金枠１との間のバツクアツ
プ材の充填容量を小さくし、かつ、断熱性のある
容器としている。 Reference numeral 9 denotes a mold, and as shown in FIGS. 1 and 2, it is installed in the metal frame 1 in a vertical position with the feeder section 10 positioned above. During this installation, the metal frame 1 and the mold 9 are installed with their centers aligned, and by providing the refractory lining layer 2 on the metal frame 1, a back-up material between the mold 9 and the metal frame 1 is provided. The container has a small filling capacity and is insulated.
而して、鋳型９を金枠１に第１図および第２図
に示す如く設置した後、加熱発生手段５を着火せ
しめ金枠１内で鋳型９が所定温度まで例えば１〜
２時間、直接的に加熱される。所定温度まで加熱
された後に、加熱発生手段５を停止せしめ、第３
図に示すようにバツクアツプ材１１が鋳型９と金
枠１との間に充填される。 After installing the mold 9 in the metal frame 1 as shown in FIGS. 1 and 2, the heating generating means 5 is ignited and the mold 9 is heated to a predetermined temperature within the metal frame 1, for example, from 1 to 2.
Heat directly for 2 hours. After being heated to a predetermined temperature, the heating generating means 5 is stopped, and the third
As shown in the figure, a backup material 11 is filled between the mold 9 and the metal frame 1.
このバツクアツプ材１１としては粒径が50〜80
mmφの球状の耐火物、例えば那智産玉石、瀬戸産
玉石、フランス産玉石等が使用され、ここに、所
定温度の高温に加熱された鋳型９はバツクアツプ
材１１の相互間に形成された肉眼看取可能な断熱
空間によつてその高温状態が効果的に維持され
る。 This backup material 11 has a particle size of 50 to 80
Spherical refractories of mmφ are used, such as cobblestones from Nachi, cobblestones from Seto, cobblestones from France, etc., and the mold 9 heated to a predetermined high temperature is formed between the back-up materials 11 with the naked eye. The high temperature condition is effectively maintained by the available insulation space.
なお、耐火物の粒径は耐衝撃性（セラミツクセ
ル）より、決定されるものである。 Incidentally, the particle size of the refractory is determined by the impact resistance (ceramic cell).
本発明は以上の通りに実施されるものであり、
従つて本発明によれば、金枠内で鋳型を直接的に
加熱することから、鋳型は極めて容易かつ確実に
所定の加熱温度にすることができるし、鋳型の加
熱後の取出作業等が必要でないことから、鋳型の
温度降下を招くこともない。また、加熱後に粒径
が50〜80mmφの球状の耐火物でバツクアツプする
ことから、バツクアツプ材による吸熱がサンドの
ように小径のものに比べて少なく、また、耐火物
の当接によつてその相互間に形成される空間は、
肉眼看取可能な十分な大きさを有しているので良
好な断熱空間として作用し、これらの故、鋳型の
温度降下を招くおそれも少ない等の利点がある。
従つて、本発明によれば、薄肉形状鋳物は勿論の
ことその他の鋳物においてもピンホール、ブロー
ホール等の欠陥がない良品質の鋳物が鋳造でき
る。 The present invention is carried out as described above,
Therefore, according to the present invention, since the mold is directly heated within the metal frame, the mold can be heated to a predetermined heating temperature extremely easily and reliably, and there is no need to take out the mold after heating it. Therefore, it does not cause a drop in the temperature of the mold. In addition, since it is backed up with spherical refractories with a particle size of 50 to 80 mmφ after heating, the heat absorbed by the backup material is less than that of small-diameter ones such as sand. The space formed between
Since it is large enough to be visible to the naked eye, it acts as a good heat insulating space, and therefore has the advantage of being less likely to cause a drop in the temperature of the mold.
Therefore, according to the present invention, not only thin-walled castings but also other castings can be cast with good quality without defects such as pinholes and blowholes.
図面は本発明の具体一例を示し、第１図は鋳型
加熱時の断面図、第２図は同じく平面図、第３図
はバツクアツプ時の要部断面図である。
１……金枠、３……加熱装置、８……加熱孔、
９……鋳型、１１……バツクアツプ材。
The drawings show a specific example of the present invention; FIG. 1 is a sectional view when the mold is heated, FIG. 2 is a plan view thereof, and FIG. 3 is a sectional view of the main part during backup. 1... Metal frame, 3... Heating device, 8... Heating hole,
9... Mold, 11... Backup material.
Claims (1)
の鋳型を前記加熱手段で所定温度まで直接的に加
熱した後、鋳型と金枠との間に粒径が50〜80mmφ
の球状の耐火物を充填し、耐火物を相互に部分的
に当接させて金型を支持すると共に耐火物の相互
間に断熱空間を形成することを特徴とする鋳型加
熱方法。1 A mold is installed in a metal frame having a heating means, and after this mold is directly heated to a predetermined temperature by the heating means, a particle size of 50 to 80 mmφ is placed between the mold and the metal frame.
A method for heating a mold, characterized in that the mold is filled with spherical refractories, the refractories are brought into partial contact with each other to support the mold, and a heat insulating space is formed between the refractories.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10024478A JPS5527451A (en) | 1978-08-15 | 1978-08-15 | Casting mold heating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10024478A JPS5527451A (en) | 1978-08-15 | 1978-08-15 | Casting mold heating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5527451A JPS5527451A (en) | 1980-02-27 |
| JPS625706B2 true JPS625706B2 (en) | 1987-02-06 |
Family
ID=14268823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10024478A Granted JPS5527451A (en) | 1978-08-15 | 1978-08-15 | Casting mold heating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5527451A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56139252A (en) * | 1980-03-31 | 1981-10-30 | Nissan Motor Co Ltd | Heat insulating vessel for vacuum-molding mold |
| JPS63112041A (en) * | 1986-10-30 | 1988-05-17 | Mazda Motor Corp | Lost wax casting method |
| EP1152848B1 (en) * | 1998-11-20 | 2011-08-17 | Rolls-Royce Corporation | Method and apparatus for production of a cast component |
| KR100676569B1 (en) * | 1999-07-02 | 2007-01-30 | 인터내셔널 엔진 인터렉츄얼 프로퍼티 캄파니, 엘엘씨 | Casting method and apparatus |
| JP2006305594A (en) * | 2005-04-27 | 2006-11-09 | Daido Castings:Kk | Precision casting method |
-
1978
- 1978-08-15 JP JP10024478A patent/JPS5527451A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5527451A (en) | 1980-02-27 |
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