JPH11179486A - Die, in particular, annular die for manufacturing cylindrical casting - Google Patents
Die, in particular, annular die for manufacturing cylindrical castingInfo
- Publication number
- JPH11179486A JPH11179486A JP5502698A JP5502698A JPH11179486A JP H11179486 A JPH11179486 A JP H11179486A JP 5502698 A JP5502698 A JP 5502698A JP 5502698 A JP5502698 A JP 5502698A JP H11179486 A JPH11179486 A JP H11179486A
- Authority
- JP
- Japan
- Prior art keywords
- peripheral wall
- mold
- circumferential wall
- graphite
- wall
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/061—Materials which make up the mould
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、溶融金属から円筒
形の鋳造品、特に放射性物質充填用の遮蔽コンテナ、を
製造するための金型、特に環状金型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for manufacturing a cylindrical casting, particularly a shielding container for filling a radioactive substance, from molten metal, and more particularly to an annular mold.
【0002】[0002]
【従来の技術】厚壁の鋳物は溶湯の凝固時間が長いため
偏析若しくは大粒径のスフェルライトを形成する傾向が
あることは公知である。このことは、硬さ、弾性限界及
び伸び率のような材料特性値を低下させかつまたより薄
い壁厚に鋳造されたプローブの規格にも合わなくなると
いう結果を生じる。これを防止するために、凝固過程を
加速する目的で、金型が使用され、これは、慣用の方法
(砂型鋳造)において通常行われているよりも急速に、
鋳込まれた鋳造材料からの熱エネルギーを吸収すること
ができる。2. Description of the Related Art It is known that thick-walled castings tend to segregate or form spherulite having a large grain size due to the long solidification time of molten metal. This has the consequence that material properties such as hardness, elastic limit and elongation are reduced and also do not meet the specifications of probes cast to a lower wall thickness. To prevent this, molds are used with the aim of accelerating the solidification process, which is more rapid than is normally done in conventional methods (sand casting),
It can absorb thermal energy from the cast material.
【0003】しかし急速に凝固させた場合、800℃〜
700℃、特に720℃の温度で、パーライト形成の臨
界範囲を通過することになる。フェライト地を有する鋳
物の製造を目的とする限り、溶湯が特にこの範囲にある
ときに、徐々に冷却することにより、フェライト組織の
形成が確実にえられるようにしなければならない。しか
しこのことは、熱エネルギーが妨げられることなく金型
から放出される場合には、えられない。However, when solidified rapidly, 800 ° C.
At a temperature of 700 ° C, especially 720 ° C, it will pass through the critical range of pearlite formation. As long as the aim is to produce a casting having a ferrite ground, the formation of the ferrite structure must be ensured by gradual cooling, especially when the melt is in this range. However, this is not the case if the heat energy is released unhindered from the mold.
【0004】このような熱放出を防止することは、金型
を離した後に鋳物上に断熱フードを被せることによっ
て、基本的には可能である。このフードには、所期の目
的で720℃を越える温度範囲を改めて生じさせるため
に、積極的な加熱エレメントを設けることも可能であ
る。しかしこのような手段は比較的高い経費を必要とす
る。[0004] Prevention of such heat release is basically possible by covering the casting with an insulating hood after releasing the mold. The hood can also be provided with a positive heating element in order to renew the temperature range above 720 ° C. for the intended purpose. However, such measures require relatively high costs.
【0005】[0005]
【発明が解決しようとする課題】本発明の課題は、フェ
ライト組織地を形成するために、臨界的なパーライト形
成範囲において、鋳込まれた溶湯の所要の冷却挙動が困
難なくえられる、はじめに述べた構造形式の金型、特に
環状金型を提供することにある。SUMMARY OF THE INVENTION The object of the present invention is to provide a ferrite microstructure in which the required cooling behavior of the cast molten metal can be achieved without difficulty in a critical pearlite formation range. In particular, it is an object of the present invention to provide a mold having a different structure type, particularly an annular mold.
【0006】[0006]
【課題を解決するための手段】上記の課題は本発明によ
れば、請求項1の上位概念部に記載の金型において、金
型の鋼又は鋳鉄製の周壁が、主に黒鉛から成る内側周壁
と、黒鉛より明らかに熱伝導率が低い耐火物から成る中
間周壁と、を有し、鋳造材料、主に黒鉛から成る内側周
壁の壁厚及び中間周壁の壁厚が、鋳造材料の所定の冷却
挙動に合わせて、設定されていることによって、解決さ
れている。According to the present invention, there is provided a mold according to the present invention, wherein the steel or cast iron peripheral wall of the mold is mainly made of graphite. A peripheral wall and an intermediate peripheral wall made of a refractory material having a thermal conductivity clearly lower than that of graphite, wherein the wall thickness of the casting material, the inner peripheral wall mainly composed of graphite, and the wall thickness of the intermediate peripheral wall are determined by a predetermined value of the casting material. The problem is solved by setting according to the cooling behavior.
【0007】[0007]
【発明の効果】本発明の思想は、黒鉛というものが溶融
金属からの、従ってまた鋳込まれた溶湯からの熱を、鋼
又は鉄と比較できる程度の時間で吸収することができ、
従って黒鉛というものが、予測しえなかったことであっ
たが、金型の材料として適したものであるという認識に
基づくものである。黒鉛から成る金型若しくは金型の黒
鉛製周壁がその質量効果に基づいて、鋳込まれた溶湯か
らの熱エネルギを、特に、1300℃〜1000℃の温
度範囲における溶融熱を、遅くとも4時間後に吸収した
後は、その後の熱の放出が、耐火物から成る中間周壁に
よって遅延され、720℃での上記のパーライト形成の
臨界範囲が、毎時20℃〜50℃の冷却速度で経過す
る。この場合、鋳造材料、黒鉛周壁の壁厚及び、耐火物
から成る中間周壁の壁厚若しくは断熱壁厚は、所期の冷
却挙動が生じてフェライト組織地が生じるように、設定
されている。中間周壁、従ってまた耐火物層の厚さは、
有利には、800℃〜700℃の温度範囲がほぼ4時間
経過するように、設定されている。The idea of the present invention is that graphite can absorb the heat from the molten metal, and thus also from the cast molten metal, in a time comparable to that of steel or iron.
Therefore, although graphite could not be predicted, it is based on the recognition that it is suitable as a material for a mold. Due to the mass effect, the mold made of graphite or the graphite peripheral wall of the mold removes the heat energy from the cast molten metal, in particular, the heat of fusion in the temperature range of 1300 ° C. to 1000 ° C. after 4 hours at the latest. After absorption, the subsequent release of heat is delayed by the intermediate peripheral wall of refractory, and the critical range for the formation of pearlite at 720 ° C. elapses at a cooling rate of 20 ° C. to 50 ° C. per hour. In this case, the wall thickness of the casting material, the graphite peripheral wall, and the wall thickness of the intermediate peripheral wall or the heat insulating wall made of the refractory are set so that the desired cooling behavior occurs and the ferrite structure is generated. The thickness of the intermediate wall, and thus also the refractory layer,
Advantageously, the temperature range from 800 ° C. to 700 ° C. is set such that approximately 4 hours elapse.
【0008】本発明にとって重要なさらに別の手段は以
下のように構成されている。即ち、本発明によれば、内
側周壁が粘土質黒鉛又は純粋黒鉛から成っている。さら
に本発明によれば、中間周壁は、有利には、自己硬化性
の断熱性の突固め耐火物から成っている。本発明のさら
に別の提案によれば、中間周壁は耐火コンクリートから
成っている。中間周壁が自己硬化性の断熱性の突固め耐
火物又は耐火コンクリートから成っている上記の両方の
いずれの場合にも、これらの耐火性被覆はたんに熱の放
出を抑えるブレーキとして機能するだけでなく、鋼又は
鋳鉄製周壁と黒鉛製周壁とを密に結合するためにも役立
ち、さらに、黒鉛周壁若しくは黒鉛金型を鋼又は鋳鉄製
周壁に支持する機能及び鋼又は鋳鉄製周壁に付着させる
機能をも果たしている。同時に鋼又は鋳鉄製周壁と中間
周壁との密な結合がえられ、該中間周壁はそれ自体で鋼
又は鋳鉄製周壁に支持される。耐火物としては、コンク
リートの他に、一方では熱的観点からして断熱性に優れ
かつ他方では鋳造圧から生じる力を鋼又は鋳鉄製周壁へ
伝達することができるものであればいずれの材料でも考
慮に入れることができる。黒鉛周壁には塗膜を設けるこ
とができるが、しかし塗膜は必ずしも必要ではない。そ
れというのは、鋳込まれた溶湯の凝固後は鋳物の収縮が
黒鉛周壁の収縮よりも大きく、従って黒鉛金型と鋳物と
の間にギャップが生じ、その結果鋳物は困難なく金型か
ら引き離すことができるからである。[0008] Still another means important for the present invention is constituted as follows. That is, according to the present invention, the inner peripheral wall is made of clay graphite or pure graphite. Furthermore, according to the invention, the intermediate peripheral wall is advantageously made of a self-hardening, heat-insulating, compacted refractory. According to yet another proposal of the invention, the intermediate peripheral wall is made of refractory concrete. In both of the above cases where the intermediate wall is made of self-hardening, insulated, compacted refractory or refractory concrete, these refractory coatings simply act as brakes to limit the release of heat. In addition, it is also useful for tightly connecting the steel or cast iron peripheral wall and the graphite peripheral wall, and also supports the graphite peripheral wall or graphite mold on the steel or cast iron peripheral wall and attaches it to the steel or cast iron peripheral wall. Also plays. At the same time, a tight connection between the steel or cast iron peripheral wall and the intermediate peripheral wall is obtained, said intermediate peripheral wall itself being supported by the steel or cast iron peripheral wall. In addition to concrete, any material can be used as the refractory, as long as it is excellent in thermal insulation from the viewpoint of heat and on the other hand can transmit the force generated from the casting pressure to the peripheral wall made of steel or cast iron. Can be taken into account. A coating may be provided on the graphite peripheral wall, but a coating is not required. This is because, after solidification of the cast molten metal, the casting shrinks more than the graphite wall shrinks, thus creating a gap between the graphite mold and the casting, so that the casting can be separated from the mold without difficulty Because you can do it.
【0009】本発明は、薄い鋼若しくは鋳鉄製周壁を有
する薄壁金型又は厚い鋼若しくは鋳鉄製周壁を有する厚
壁金型において実施することができる。両者いずれの場
合にも、変形挙動及び特に、800℃〜700℃間の臨
界的なパーライト形成範囲を経過する時間間隔が延長さ
れる点では、比較的僅かな相違しかない。両実施形態に
おいては鋼又は鋳鉄製周壁と内側周壁との間に、中間周
壁の位置を固定するために、要するに耐火物層の滑落を
避けるために、環状溝、例えば面一に整列した環状溝、
を配置することも可能である。The present invention can be implemented in a thin-wall mold having a thin steel or cast iron peripheral wall or a thick-wall mold having a thick steel or cast iron peripheral wall. In both cases, there is only a relatively slight difference in that the deformation behavior and in particular the time interval over the critical pearlite formation range between 800 ° C. and 700 ° C. is extended. In both embodiments, between the steel or cast iron peripheral wall and the inner peripheral wall, in order to fix the position of the intermediate peripheral wall, in order to avoid slipping of the refractory layer in short, an annular groove, for example, an annular groove aligned flush ,
Can also be arranged.
【0010】[0010]
【発明の実施の形態】図には、溶融金属から円筒形の鋳
物2、特に遮蔽コンテナ、を製造するための金型1若し
くは環状金型が示されている。図1は薄壁金型、図2は
厚壁金型である。図1の実施例ではさらに蓋3、下型
4、鋳物2、被い中子5及び内中子6が示されている。
図1及び図2の両図はいずれも、主に黒鉛から成る内側
周壁7、コンクリートから成る中間周壁8及び鋼周壁9
を有する鋼金型を示すものである。鋳造材料、黒鉛製内
側周壁7の壁厚及びコンクリート周壁としての中間周壁
8の壁厚は、鋳造材料従って鋳物2の所要の冷却挙動に
合わせて、決められている。鋼周壁9と内側周壁7との
間には、薄壁金型の実施例では、面一に整列した環状溝
10が、鋼周壁9と黒鉛周壁としての内側周壁7との間
の中間周壁7の位置を固定するために、設けられてい
る。これによって、鋼金型の異なる周壁間に、支持作用
及び付着作用を有する密な結合体がえられる。これに関
連して、コンクリート周壁としての中間周壁8を耐火コ
ンクリートから成る鋳込み周壁として形成することがで
きる。1 shows a mold 1 or an annular mold for producing a cylindrical casting 2, in particular a shielding container, from molten metal. FIG. 1 shows a thin-wall mold, and FIG. 2 shows a thick-wall mold. In the embodiment of FIG. 1, a lid 3, a lower mold 4, a casting 2, a covering core 5, and an inner core 6 are further shown.
1 and 2 both show an inner peripheral wall 7 mainly made of graphite, an intermediate peripheral wall 8 made of concrete and a steel peripheral wall 9.
1 shows a steel mold having: The wall thickness of the casting material, the inner peripheral wall 7 made of graphite and the wall thickness of the intermediate peripheral wall 8 as the concrete peripheral wall are determined according to the required cooling behavior of the casting material and therefore the casting 2. Between the steel peripheral wall 9 and the inner peripheral wall 7, in the embodiment of the thin-wall mold, an annular groove 10 aligned flush with the steel peripheral wall 9 and the position of the intermediate peripheral wall 7 between the steel peripheral wall 9 and the inner peripheral wall 7 as a graphite peripheral wall. It is provided to fix. This results in a tight connection between the different peripheral walls of the steel mold having a supporting and adhering action. In this connection, the intermediate peripheral wall 8 as a concrete peripheral wall can be formed as a cast peripheral wall made of refractory concrete.
【0011】実施例によれば、鋼周壁9の壁厚は、薄壁
金型では、ほぼ10cm〜15cmであり、これに対し
て、厚壁金型では、ほぼ30cm〜40cmである。中
間周壁8の壁厚は、使用されるその都度の耐火物によっ
て異なるが、一般的には2.5cm〜7.5cmであ
る。黒鉛周壁の、即ち内側周壁7の壁厚は、実施例によ
り、5cm〜10cmになる。特に、内側周壁7及び中
間周壁8の壁厚は、フェライト組織地の形成がえられる
ようにするために、常に、800℃〜700℃の温度範
囲が充分に低い冷却速度で経過するように、選ばれる。According to the embodiment, the wall thickness of the steel peripheral wall 9 is approximately 10 cm to 15 cm in a thin-wall mold, whereas it is approximately 30 cm to 40 cm in a thick-wall mold. The wall thickness of the intermediate peripheral wall 8 depends on the respective refractory used, but is generally between 2.5 cm and 7.5 cm. The wall thickness of the graphite peripheral wall, that is, the inner peripheral wall 7 is 5 cm to 10 cm according to the embodiment. In particular, the wall thickness of the inner peripheral wall 7 and the intermediate peripheral wall 8 is set so that the temperature range of 800 ° C. to 700 ° C. always passes at a sufficiently low cooling rate in order to obtain the formation of the ferrite texture. To be elected.
【0012】耐火コンクリートとして、実施例では、液
で凝結硬化可能な粒度6までのコランダムから成る耐火
物が使用される。供給状態では乾燥しているこのコラン
ダムの主成分はAL2 O3 62% ,SiO2 25%
,CaO 7% ,TiO2 2% 及びFe2 03 2%
である。調合液は14 l/100kgである。使
用温度は1700℃までである。この耐火物の形成は鋳
造の過程で行うことができる。In the embodiment, a refractory made of corundum having a particle size of up to 6 and capable of setting and hardening with a liquid is used as the refractory concrete. The main component of corundum are dried in a feed state, AL 2 O 3 62%, SiO 2 25%
, CaO 7%, TiO 2 2% and Fe 2 O 3 2%
It is. The preparation is 14 l / 100 kg. The operating temperature is up to 1700 ° C. This refractory can be formed during the casting process.
【図1】蓋及び下型を有する薄壁金型の垂直断面図であ
る。FIG. 1 is a vertical sectional view of a thin-wall mold having a lid and a lower mold.
【図2】蓋及び下型を有しない厚壁金型の垂直断面図で
ある。FIG. 2 is a vertical sectional view of a thick-wall mold having no lid and a lower mold.
1 金型 2 鋳物 3 蓋 4 下型 5 被い中子 6 内中子 7 内側周壁 8 中間周壁 9 鋼周壁 10環状溝 DESCRIPTION OF SYMBOLS 1 Mold 2 Casting 3 Lid 4 Lower mold 5 Covering core 6 Inner core 7 Inner peripheral wall 8 Intermediate peripheral wall 9 Steel peripheral wall 10 Annular groove
───────────────────────────────────────────────────── フロントページの続き (72)発明者 ハインツ、ロベルツ ドイツ、41363、ユヒェン、ケルツェンベ ルガー、シュトラーセ、43ベー (72)発明者 エー、ペー、ヴェルンケ ドイツ、47638、シュトレーレン、アム、 ギーゼルベルク、18 (72)発明者 マンフレート、ザポック ドイツ、47918、テニスフォルスト、ゲル デルナー、シュトラーセ、92/94 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Heinz, Roberts Germany, 41363, Jüchen, Kerzenberger, Straße, 43b 72) Inventor Manfred, Zapok Germany, 47918, Tennis Forst, Ger Delner, Strasse, 92/94
Claims (8)
性物質充填用の遮蔽コンテナを製造するための金型にお
いて、金型の鋼又は鋳鉄製の周壁(9)が、主に黒鉛か
ら成る内側周壁(7)及び、黒鉛に対して熱伝導率が明
らかに低い耐火物から成る中間周壁(8)を有し、鋳造
材料、内側周壁(7)の壁厚及び中間周壁(8)の壁厚
が、鋳造材料の所定の冷却挙動に合わせて、設定されて
いることを特徴とする、金型。1. A mold for producing a cylindrical casting from a molten metal, in particular a shielding container for the filling of radioactive material, wherein the peripheral wall (9) made of steel or cast iron of the mold consists mainly of graphite. It has an inner peripheral wall (7) and an intermediate peripheral wall (8) made of a refractory material having a significantly lower thermal conductivity to graphite, a casting material, a wall thickness of the inner peripheral wall (7) and a wall of the intermediate peripheral wall (8). A mold having a thickness set in accordance with a predetermined cooling behavior of a casting material.
黒鉛から成ることを特徴とする、請求項1記載の金型。2. The mold according to claim 1, wherein the inner peripheral wall is made of clay graphite or pure graphite.
を特徴とする、請求項1又は2記載の金型。3. The mold according to claim 1, wherein a coating film is provided on the inner peripheral wall (7).
突固め耐火物から成ることを特徴とする、請求項1から
3までのいずれか1項記載の金型。4. The mold according to claim 1, wherein the intermediate peripheral wall is made of a self-hardening heat-insulating tamped refractory.
耐火物から成ることを特徴とする、請求項1から3まで
のいずれか1項記載の金型。5. The mold according to claim 1, wherein the intermediate peripheral wall is made of refractory concrete or similar refractory.
(7)との間に、中間周壁(8)の位置を固定するため
の環状溝(10)が配置されていることを特徴とする、
請求項1から5までのいずれか1項記載の金型。6. An annular groove (10) for fixing the position of the intermediate peripheral wall (8) is arranged between the steel peripheral wall (9) or the cast iron peripheral wall and the inner peripheral wall (7). Do
The mold according to any one of claims 1 to 5.
とを特徴とする、請求項1から6までのいずれか1項記
載の金型。7. The mold according to claim 1, wherein the mold is configured as a thin-wall mold.
とを特徴とする、請求項1から6までのいずれか1項記
載の金型。8. The mold according to claim 1, wherein the mold is a thick-wall mold.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19756147.0 | 1997-12-17 | ||
DE1997156147 DE19756147C1 (en) | 1997-12-17 | 1997-12-17 | Chill mould especially for casting radioactive material container |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11179486A true JPH11179486A (en) | 1999-07-06 |
JP2995027B2 JP2995027B2 (en) | 1999-12-27 |
Family
ID=7852283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10055026A Expired - Fee Related JP2995027B2 (en) | 1997-12-17 | 1998-03-06 | Molds for producing cylindrical castings, especially annular molds |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2995027B2 (en) |
DE (1) | DE19756147C1 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE911064C (en) * | 1952-04-06 | 1954-05-10 | Fritz Werner Ag | Permanent form, especially for steel die casting, and process for their production |
DE2532401C2 (en) * | 1975-07-19 | 1986-04-17 | Piel & Adey, 5650 Solingen | Chill mold for casting heavy metals and ferrous materials, in particular stainless steels |
DE4427963C1 (en) * | 1994-08-09 | 1995-09-07 | Wte Ingenieurgesellschaft Fuer | Method for producing mosaic containers and other castings, and insulating hood for implementation of the method |
-
1997
- 1997-12-17 DE DE1997156147 patent/DE19756147C1/en not_active Expired - Fee Related
-
1998
- 1998-03-06 JP JP10055026A patent/JP2995027B2/en not_active Expired - Fee Related
Also Published As
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DE19756147C1 (en) | 1999-01-28 |
JP2995027B2 (en) | 1999-12-27 |
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