JP2795174B2 - Cast-in tube support method - Google Patents
Cast-in tube support methodInfo
- Publication number
- JP2795174B2 JP2795174B2 JP12259694A JP12259694A JP2795174B2 JP 2795174 B2 JP2795174 B2 JP 2795174B2 JP 12259694 A JP12259694 A JP 12259694A JP 12259694 A JP12259694 A JP 12259694A JP 2795174 B2 JP2795174 B2 JP 2795174B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- pipe
- cast
- short
- mold
- 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
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋳造品の内部に鋼管等
を鋳包んだ鋳包み管の有用な支持方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a useful method for supporting a cast-in tube in which a steel pipe or the like is cast inside a cast product.
【０００２】[0002]
【従来の技術】図２は従来の鋳包み管の支持方法を示す
断面図である。１は鋳型であり、互いに結合される上鋳
型１ａと下鋳型１ｂからなる。２は鋳包もうとする管で
ある。３は滑りのよい薄膜であり、管２の外周面と鋳型
１の内周面にそれぞれ取り付ける。４は柔軟性を有する
難燃性の封止材であり、前記薄膜３，３の間の空間を密
閉する。５はボール紙等の薄片であり、前記薄膜３，３
の間の空間に設けられて鋳型１に対する管２の上下方向
の位置を定める。溶湯を湯口６から注げば、鋳物から端
部が突出した管２を有する鋳包み管が得られる。2. Description of the Related Art FIG. 2 is a sectional view showing a conventional method for supporting a cast-in tube. Reference numeral 1 denotes a template, which comprises an upper template 1a and a lower template 1b which are connected to each other. Reference numeral 2 denotes a tube to be cast. Reference numeral 3 denotes a slippery thin film which is attached to the outer peripheral surface of the tube 2 and the inner peripheral surface of the mold 1, respectively. Reference numeral 4 denotes a flexible flame-retardant sealing material, which seals the space between the thin films 3 and 3. 5 is a thin piece of cardboard or the like,
And the vertical position of the tube 2 with respect to the mold 1 is determined. When the molten metal is poured from the gate 6, a cast-in tube having the tube 2 whose end protrudes from the casting is obtained.
【０００３】[0003]
【発明が解決しようとする課題】従来の鋳包み管の支持
方法によれば、管の変形・管の移動・管を包む鋳物の偏
倚等の寸法不良や、溶湯の管内への侵入等の不都合が生
じ、良好な製品が得られない場合があった。According to the conventional method of supporting a cast-in tube, there are disadvantages such as deformation of the tube, movement of the tube, deviation of the size of the casting surrounding the tube, and invasion of the molten metal into the tube. And good products could not be obtained in some cases.
【０００４】前記寸法不良の原因は次のように推察され
る。上鋳型１ａと下鋳型１ｂを結合して管２の端部２ａ
を保持した場合、管２の端部２ａが鋳型１によって強く
締めつけられることがある。このような状態では、溶湯
を鋳込んで管２が熱膨張した時に、管２の端部２ａの鋳
型１に対する移動が妨げられるので、鋳型１によって保
持された端部２ａ以外の部分が抵抗の弱い方向や他の何
らかの力が作用する方向に移動する。そして、その状態
のままで湯が凝固して管２が固定されてしまうと、管２
の変形・管２の移動・管２を包む鋳物の偏倚等の寸法不
良が発生する。[0004] The cause of the dimensional defect is presumed as follows. The upper mold 1a and the lower mold 1b are connected to each other to form an end 2a of the tube 2.
Is held, the end 2 a of the tube 2 may be strongly tightened by the mold 1. In such a state, when the molten metal is cast and the tube 2 thermally expands, the movement of the end 2a of the tube 2 with respect to the mold 1 is hindered, so that portions other than the end 2a held by the mold 1 have resistance. It moves in a weak direction or any other force acting direction. When the hot water solidifies in this state and the pipe 2 is fixed, the pipe 2
Dimensional defects such as deformation of the tube, movement of the tube 2 and deviation of the casting surrounding the tube 2 occur.
【０００５】上記のような寸法不良を避けるため、管２
の端部２ａを支持する前記薄膜３、封止材４、薄片５の
量、特に封止材４の量を多めにすることがある。しかし
ながら、そのようにすると、鋳造時の溶湯の動圧・静圧
によって封止材４や薄片５が押し流されたり封止材４や
薄片５が移動して管２と鋳型１の間に僅かな隙間が生
じ、溶湯が管２と鋳型１の間から管２の端面２ｂに回り
込んで管２内に侵入したり、管２の膨張を妨げるという
他の不都合が生じてしまう。In order to avoid the above dimensional defects, the pipe 2
In some cases, the amount of the thin film 3, the sealing material 4, and the flakes 5 supporting the end 2a of the first portion 2a, particularly the amount of the sealing material 4, may be increased. However, in such a case, the sealing material 4 or the thin piece 5 is pushed away by the dynamic pressure / static pressure of the molten metal at the time of casting, or the sealing material 4 or the thin piece 5 moves and a slight amount A gap is generated, and another inconvenience occurs that the molten metal wraps around the end face 2b of the pipe 2 from between the pipe 2 and the mold 1 and enters the pipe 2 or hinders the expansion of the pipe 2.
【０００６】本発明は、鋳包み管において、管の熱膨張
を妨げず、且つ溶湯が管の端部の側に回り込んで管内に
侵入しないように管を支えることのできる簡単な支持方
法を提供することを目的としている。SUMMARY OF THE INVENTION The present invention provides a simple supporting method for a cast-in tube, which does not hinder the thermal expansion of the tube and can support the tube so that the molten metal does not go around the end of the tube and enter the tube. It is intended to provide.
【０００７】[0007]
【課題を解決するための手段】請求項１に記載された鋳
包み管の支持方法は、管の外径よりも僅かに大きい内径
を有する短管を管の端部に外挿し、短管を管の端部が挿
入される鋳型の保持部に定置して管を支持することを特
徴としている。According to a first aspect of the present invention, there is provided a method for supporting a cast-in tube, wherein a short tube having an inner diameter slightly larger than the outer diameter of the tube is extrapolated to the end of the tube, and the short tube is inserted. It is characterized in that the end of the tube is fixed to the holding portion of the mold to be inserted and supports the tube.
【０００８】請求項２に記載された鋳包み管の支持方法
は、請求項１記載の鋳包み管の支持方法において、前記
管の端部の外周面と前記短管の内周面との間に間隔を維
持するためのスペーサ部材を設けたことを特徴としてい
る。According to a second aspect of the present invention, there is provided a method for supporting a cast-in tube according to the first aspect, wherein the outer circumferential surface of the end of the tube and the inner circumferential surface of the short tube are provided. Is characterized in that a spacer member for maintaining the interval is provided.
【０００９】請求項３に記載された鋳包み管の支持方法
は、請求項１記載の鋳包み管の支持方法において、鋼管
からなる前記管の端部と前記短管に表面処理を施すこと
を特徴としている。According to a third aspect of the present invention, there is provided a method of supporting a cast-in tube according to the first aspect, wherein the end portion of the steel tube and the short tube are subjected to surface treatment. Features.
【００１０】[0010]
【作用】熱膨張による管の移動は短管によって妨げられ
ることがなく、溶湯が管の端面に回り込んで管内に侵入
することは短管によって防がれる。The movement of the pipe due to thermal expansion is not hindered by the short pipe, and the short pipe prevents the molten metal from wrapping around the end face of the pipe and entering the pipe.
【００１１】[0011]
【実施例】図１は、本実施例の鋳包み管の支持方法を示
す断面図である。鋳型１１は、互いに結合される上鋳型
１１ａと下鋳型１１ｂからなり、鋳包もうとする管１２
の端部１２ａを保持する保持部１１ｃを構成する。１３
は管１２の端部に外挿される短管である。短管１３は鋳
型１１の保持部１１ｃに定置されて管１２を支持する。FIG. 1 is a sectional view showing a method for supporting a cast-in tube according to this embodiment. The mold 11 is composed of an upper mold 11a and a lower mold 11b which are connected to each other.
Of the holding portion 11c for holding the end portion 12a. 13
Is a short tube extrapolated to the end of the tube 12. The short tube 13 is fixed to the holding portion 11c of the mold 11, and supports the tube 12.
【００１２】短管１３の内径は管１２の外径よりも大き
く、短管１３の外径は鋳型１１の保持部１１ｃの内径よ
りも小さい。短管１３は、溶湯が注がれて管１２が熱膨
張した時に、管１２の端部が移動するのを妨げず、さら
に溶湯が短管１３と管１２の空隙を通って管１２の端面
から内部に侵入するのを防止する。The inside diameter of the short tube 13 is larger than the outside diameter of the tube 12, and the outside diameter of the short tube 13 is smaller than the inside diameter of the holding portion 11 c of the mold 11. The short pipe 13 does not prevent the end of the pipe 12 from moving when the molten metal is poured and the pipe 12 thermally expands, and furthermore, the molten metal passes through the gap between the short pipe 13 and the pipe 12 and the end face of the pipe 12 To prevent intrusion from inside.
【００１３】１４は、管１２の端部が様々な力によって
移動しようとする時に、管１２の外周面と短管１３の内
周面との間に適切な寸法Ｄの空隙を維持するスペーサ部
材としての挿入物である。14 is a spacer member for maintaining a gap of an appropriate dimension D between the outer peripheral surface of the tube 12 and the inner peripheral surface of the short tube 13 when the end of the tube 12 is moving by various forces. As an insert.
【００１４】図１において、管１２の直径をＧとする
と、前記空隙の寸法Ｄは次式により表される。In FIG. 1, when the diameter of the tube 12 is G, the dimension D of the space is expressed by the following equation.
【００１５】Ｄ＝ＫＧα（ＴP −Ｔ）、但しαは管１２
の熱膨張率、ＴP は鋳込みによって管１２が達する温度
の内の弾性域の温度、Ｔは室温、Ｋは０．２５〜１．５
の定数である。D = KGα (T P −T), where α is the tube 12
, T P is the temperature of the elastic region of the temperature reached by the pipe 12 by casting, T is room temperature, and K is 0.25 to 1.5.
Is a constant.
【００１６】短管１３の厚さＢについては、上鋳型１１
ａと下鋳型１１ｂを合わせる時に加わる機械的外力およ
び注湯時に生じる熱的影響に対して変形を起こすことな
く剛体として前記空隙の寸法Ｄをほぼ均等に維持できる
ものであればよく、極端に厚くする必要はない。Regarding the thickness B of the short tube 13, the upper mold 11
a as long as it can maintain the dimension D of the air gap almost uniformly as a rigid body without causing deformation due to mechanical external force applied when a is joined to the lower mold 11b and thermal influence generated during pouring. do not have to.
【００１７】なお、短管１３の厚さＢについて極端に厚
いものとは、管１２の厚さＡの３倍を越えたり、又はそ
の外径が管１２の周囲の鋳物部分の外径寸法を越えるよ
うな場合を言う。The thickness B of the short pipe 13 is extremely thick when it exceeds three times the thickness A of the pipe 12 or when the outer diameter of the short pipe 13 is smaller than the outer diameter of the casting around the pipe 12. Say something that goes over.
【００１８】短管１３の長さＣは、Ｇのおよそ０．３〜
２倍である。管１２と短管１３の相対位置を示す寸法Ｅ
は、０〜１Ｇの間で設定される。前記挿入物１４の厚さ
はおよそＤに等しく、その長さは（０．３〜１．０）Ｃ
であり、その巾は管２の円周の１／１０程度である。The length C of the short pipe 13 is about 0.3 to about G.
It is twice. Dimension E indicating relative position between tube 12 and short tube 13
Is set between 0 and 1G. The thickness of the insert 14 is approximately equal to D and its length is (0.3-1.0) C
And its width is about 1/10 of the circumference of the tube 2.
【００１９】なお、前記挿入物１４は、図１（ｂ）に示
すように管１２と短管１３の空隙の中の上部及び下部の
両方に設ける場合と、いずれにも設けない場合とがあ
る。図１の間隙Ｄは注湯時にも均等であることを前提条
件としているが、諸条件が不整備の為にその均等性が大
幅に崩れる場合には、拡大された部分を通って溶湯が管
１２の端面から内部に浸入する可能性がある。この様な
場合に於いては間隙Ｄの均等性を維持する目的で挿入物
１４を設ける。As shown in FIG. 1B, the insert 14 may be provided at both the upper and lower portions of the space between the tube 12 and the short tube 13, or may not be provided at both. . The gap D in FIG. 1 is premised on being uniform even when pouring. However, if the uniformity is largely lost due to inadequate conditions, the molten metal will pass through the enlarged part. 12 may enter the interior from the end face. In such a case, the insert 14 is provided for the purpose of maintaining the uniformity of the gap D.
【００２０】管１２と短管１３の材質は主に鋳造品の材
質によって定められ、多くの場合、鋳造品と同系統の材
質が用いられる。特殊な場合にはセラミックス、石英、
黒鉛等の非金属も用いられる。鋼管等の金属製の管を前
記管１２や短管１３に利用する場合には、その表面に研
掃・研磨・機械加工・メッキ等の表面処理を施せば、本
実施例の方法を適用した際の効果がさらに向上する。The material of the pipe 12 and the short pipe 13 is mainly determined by the material of the casting, and in many cases, the same material as that of the casting is used. Ceramics, quartz,
Non-metals such as graphite are also used. When a metal pipe such as a steel pipe is used for the pipe 12 or the short pipe 13, the surface of the pipe is subjected to a surface treatment such as polishing, polishing, machining, plating, or the like, and the method of this embodiment is applied. The effect at the time is further improved.
【００２１】前記挿入物１４の材質は、注湯中であって
も前記管の端部の外周面と前記短管の内周面との間に間
隔を維持できる難燃性の材質が必要である。例えば薄片
状の金属乃至無機物またはボール紙等が有効である。The material of the insert 14 must be a flame-retardant material capable of maintaining a gap between the outer peripheral surface of the end of the pipe and the inner peripheral surface of the short pipe even during pouring. is there. For example, a flaky metal or inorganic material or cardboard is effective.
【００２２】[0022]
【発明の効果】本発明に係る鋳包み管の支持方法によれ
ば、管の端部を外挿する短管で該管を鋳型内に支持した
ので、管の熱膨張を妨げず、且つ溶湯が管の端面に回り
込んで管内に侵入しないように管を支える作業を極めて
簡単な操作で行うことができる等、産業上顕著な効果を
得ることができる。According to the method for supporting a cast-in tube according to the present invention, since the tube is supported in the mold by the short tube extrapolating the end of the tube, the thermal expansion of the tube is not hindered and the molten metal is not hindered. An extremely remarkable industrial effect can be obtained such that the operation of supporting the pipe can be performed by an extremely simple operation so that the pipe does not go around the end face of the pipe and enter the pipe.
【図１】（ａ）は鋳包み管における第１実施例の管の支
持方法を示す断面図であり、（ｂ）は（ａ）のＡ−Ａ切
断線における断面図である。FIG. 1A is a cross-sectional view showing a method of supporting a pipe of a first embodiment in a cast-in pipe, and FIG. 1B is a cross-sectional view taken along a line AA in FIG.
【図２】（ａ）は鋳包み管における従来の管の支持方法
を示す断面図であり、（ｂ）は（ａ）のＢ−Ｂ切断図に
おける断面図である。2A is a cross-sectional view showing a conventional method of supporting a pipe in a cast-in pipe, and FIG. 2B is a cross-sectional view taken along the line BB of FIG.
１１ 鋳型 １１ｃ 鋳型の保持部 １２ 管 １２ａ 管の端部 １２ｂ 管の端面 １３ 短管 １４ スペーサ部材としての挿入物 DESCRIPTION OF SYMBOLS 11 Mold 11c Mold holding part 12 Tube 12a End of tube 12b End of tube 13 Short tube 14 Insert as spacer member
フロントページの続き (72)発明者 青木 静夫 新潟県新潟市岡山1300番地 株式会社新 潟鉄工所新潟鋳造工場内 (56)参考文献 特開 平４−294855（ＪＰ，Ａ) 特開 昭63−12809（ＪＰ，Ａ) 特開 昭62−21453（ＪＰ，Ａ) 特開 昭60−148659（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B22D 19/00Continuation of the front page (72) Inventor Shizuo Aoki 1300 Okayama, Niigata City, Niigata Prefecture Niigata Iron Works, Ltd. Niigata Casting Plant (56) References JP-A-4-294855 (JP, A) JP-A-63-12809 (JP, A) JP-A-62-21453 (JP, A) JP-A-60-148695 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) B22D 19/00
Claims (3)
る短管を管の端部に外挿し、短管を管の端部が挿入され
る鋳型の保持部に定置して管を支持する鋳包み管の支持
方法。1. A short tube having an inner diameter slightly larger than the outer diameter of a tube is extrapolated to an end of the tube, and the short tube is fixed to a holding portion of a mold into which the end of the tube is inserted to support the tube. Method for supporting cast-in tubes.
面との間に間隔を維持するためのスペーサ部材を設けた
請求項１記載の鋳包み管の支持方法。2. The method for supporting a cast-in tube according to claim 1, further comprising a spacer member for maintaining a gap between an outer peripheral surface of an end portion of the tube and an inner peripheral surface of the short tube.
表面処理を施す請求項１記載の鋳包み管の支持方法。3. The method for supporting a cast-in tube according to claim 1, wherein a surface treatment is performed on an end portion of the steel tube and the short tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12259694A JP2795174B2 (en) | 1994-06-03 | 1994-06-03 | Cast-in tube support method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12259694A JP2795174B2 (en) | 1994-06-03 | 1994-06-03 | Cast-in tube support method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07323365A JPH07323365A (en) | 1995-12-12 |
| JP2795174B2 true JP2795174B2 (en) | 1998-09-10 |
Family
ID=14839850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12259694A Expired - Lifetime JP2795174B2 (en) | 1994-06-03 | 1994-06-03 | Cast-in tube support method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2795174B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2015140910A (en) * | 2010-01-20 | 2018-12-26 | Магна Интернэшнл, Инк. | BIMETALLIC COMPONENT, METHOD OF ITS PRODUCTION AND ITS APPLICATION |
-
1994
- 1994-06-03 JP JP12259694A patent/JP2795174B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07323365A (en) | 1995-12-12 |
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