JPH08141718A - Chute trough of centrifugal casting apparatus - Google Patents

Chute trough of centrifugal casting apparatus

Info

Publication number
JPH08141718A
JPH08141718A JP28462894A JP28462894A JPH08141718A JP H08141718 A JPH08141718 A JP H08141718A JP 28462894 A JP28462894 A JP 28462894A JP 28462894 A JP28462894 A JP 28462894A JP H08141718 A JPH08141718 A JP H08141718A
Authority
JP
Japan
Prior art keywords
base material
trough
porous layer
molten metal
chute
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.)
Pending
Application number
JP28462894A
Other languages
Japanese (ja)
Inventor
Manabu Kurotobi
学 黒飛
Mutsuo Uchida
睦雄 内田
Takahiro Tanaka
孝宏 田中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Original Assignee
Kubota Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kubota Corp filed Critical Kubota Corp
Priority to JP28462894A priority Critical patent/JPH08141718A/en
Publication of JPH08141718A publication Critical patent/JPH08141718A/en
Pending legal-status Critical Current

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  • Coating By Spraying Or Casting (AREA)

Abstract

PURPOSE: To improve the adhesiveness, that is the durability, of a coating agent by forming a porous layer having the surface of a base material impregnated with the coating agent. CONSTITUTION: The trough 12 of a chute trough 11 is formed to a U-shaped cross section, and the base material 13 is formed of a steel material. On the surface of the part of a runner in the base material 13, the porous layer 14 is formed by thermally spraying a material excellent in non-wettability with molten metal, i.e., the property of repelling the molten metal. As such the material, e.g. or a ceramic 50% Al2 O3 - 50% Cr2 O3 the material containing graphite such as a material contg. 40% Ni and 60% graphite contg. is suitably used. Further, the porous layer 14 is formed by thermally spraying a soft metal. By this constitution, the heat insulating property is improved and the heat of the molten metal is hardly conducted to the base material and therefore, the thermal deformation of the base material can be prevented.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、遠心鋳造装置のシュー
ト・トラフに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chute trough for a centrifugal casting machine.

【0002】[0002]

【従来の技術】鋳鉄管を遠心鋳造するための設備とし
て、図2に示されるものがある。ここで1は定置取鍋で
あり、多量の溶湯を貯留している。そして、この定置取
鍋1から1回〜数回の鋳込み分の溶湯が三角取鍋2に供
給され、この三角取鍋2内の溶湯は、この三角取鍋2の
傾倒によって、シュート・トラフ3を介して金枠台車4
内に供給される。すなわち、高速回転する金枠5を有す
る金枠台車4の移動により、シュート・トラフ3の先端
の注ぎ口6がこの金枠5内に挿入され、そしてシュート
・トラフ3が相対的に金枠5から引き抜かれるように金
枠台車4が走行することで、この金枠5の全長および全
周にわたり溶湯が供給されることになって、鋳鉄管の遠
心鋳造が行われるものである。
2. Description of the Related Art Equipment for centrifugally casting a cast iron pipe is shown in FIG. Here, 1 is a stationary ladle, which stores a large amount of molten metal. Then, the molten metal for casting from one time to several times is supplied from the stationary ladle 1 to the triangular ladle 2, and the molten metal in the triangular ladle 2 is tilted by the triangular ladle 2 to shoot the trough 3 Through the gold frame trolley 4
Supplied within. That is, the spout 6 at the tip of the chute trough 3 is inserted into the metal frame 5 by the movement of the metal frame carriage 4 having the metal frame 5 rotating at a high speed, and the chute trough 3 is relatively moved to the metal frame 5. By running the metal frame carriage 4 so as to be pulled out of the metal frame, the molten metal is supplied over the entire length and the entire circumference of the metal frame 5, and centrifugal casting of the cast iron pipe is performed.

【0003】シュート・トラフ3は、このように三角取
鍋2からの溶湯を金枠5内に案内するためのもので、金
枠5内に挿入されるトラフ7と、このトラフ7の先端の
注ぎ口6まで溶湯を流すためにこの溶湯に運動エネルギ
を付与させるシュート8とが一体に成形された構成であ
るのが一般的である。
The chute trough 3 is for guiding the molten metal from the triangular ladle 2 into the metal frame 5 as described above, and the trough 7 to be inserted into the metal frame 5 and the tip of the trough 7. In general, a chute 8 for imparting kinetic energy to the molten metal so as to flow to the pouring port 6 is integrally formed.

【0004】このシュート・トラフ3には、鋼性の母材
の表面に黒鉛系の塗型を塗布して、溶湯の焼付きの防止
を図ったり、塗型の断熱性を利用することで溶湯の熱を
シュート・トラフ3の母材に伝わりにくくしてその熱変
形を防止したりしている。そして、塗型の密着性すなわ
ち耐久性を向上させるための下地処理として、シュート
・トラフ3に対し、打撃によりピーニングを施してい
る。このピーニングによる凹みの大きさは直径3mm程
度、その深さは1mm程度である。
The chute / trough 3 is coated with a graphite-based coating die on the surface of a steel base material to prevent seizure of the molten metal or by utilizing the thermal insulation of the coating die. The heat of the is not easily transmitted to the base material of the chute trough 3 to prevent its thermal deformation. Then, as a base treatment for improving the adhesiveness of the coating type, that is, the durability, the chute trough 3 is peened by hitting. The size of the recess due to this peening is about 3 mm in diameter and its depth is about 1 mm.

【0005】[0005]

【発明が解決しようとする課題】しかし、このようにピ
ーニングによる凹みは、大きく、しかも数が少ないの
で、塗型の密着力がやや劣るという問題点がある。この
ため、塗型を一度塗布した場合に、シュート8では1回
の耐久性しかなく、またトラフ7でも数回の耐久性しか
ない。しかも、塗型が消耗して母材が露出すると上述の
焼付きが発生する。このため、鋳込み作業の際にひんぱ
んに塗型の塗布を行わなければならない。
However, since the dents due to the peening are large and the number thereof is small as described above, there is a problem that the adhesive force of the coating mold is slightly inferior. Therefore, when the coating mold is applied once, the chute 8 has a durability of only once, and the trough 7 has a durability of only a few times. Moreover, when the coating mold is consumed and the base material is exposed, the above-mentioned seizure occurs. For this reason, it is necessary to frequently apply the coating type during the casting operation.

【0006】そこで本発明はこのような問題点を解決
し、シュート・トラフへの塗型の密着性を向上させてそ
の耐久性を良好にすることを目的とする。
SUMMARY OF THE INVENTION It is therefore an object of the present invention to solve the above problems and improve the adhesion of the coating mold to the chute / trough to improve its durability.

【0007】[0007]

【課題を解決するための手段】この目的を達成するため
本発明にもとづく遠心鋳造装置のシュート・トラフは、
母材の表面に、塗型を含浸可能なポーラスな層を形成し
たものである。
In order to achieve this object, the chute trough of the centrifugal casting apparatus according to the present invention is
A porous layer capable of impregnating a coating mold is formed on the surface of a base material.

【0008】このポーラスな層は、溶湯との非濡れ性を
有する素材の溶射や、軟質金属の溶射などによって形成
される。
This porous layer is formed by thermal spraying of a material having non-wetting properties with the molten metal, thermal spraying of soft metal, or the like.

【0009】[0009]

【作用】このような構成であると、塗型を含浸可能なポ
ーラスな層を母材の表面に形成したため、塗型の密着性
すなわち耐久性が向上する。具体的には、塗型を一度塗
布することで、数十回の鋳込み作業に対する耐久性があ
る。また母材の表面にポーラスな層が形成されるため、
断熱性が向上して、溶湯の熱が母材に伝わりにくくな
り、このため母材の熱変形が防止される。
With this structure, since the porous layer capable of impregnating the coating mold is formed on the surface of the base material, the adhesiveness of the coating mold, that is, the durability is improved. Specifically, by applying the coating mold once, it has durability against several tens of casting operations. Also, since a porous layer is formed on the surface of the base material,
The heat insulation is improved, and the heat of the molten metal is less likely to be transferred to the base material, which prevents thermal deformation of the base material.

【0010】[0010]

【実施例】図1はシュート・トラフ11におけるトラフ12
の横断面を示す。このトラフ12は図示のように横断面U
字状に形成され、その母材13は鋼材によって形成されて
いる。母材13における湯道の部分の表面には、溶湯との
非濡れ性すなわち溶湯をはじく性質に優れた素材を溶射
することで、ポーラスな層14が形成されている。
EXAMPLE FIG. 1 shows a trough 12 in a chute trough 11.
2 shows a cross section of the. This trough 12 has a cross section U as shown.
The base material 13 is formed in a letter shape, and is made of steel. A porous layer 14 is formed on the surface of the runner portion of the base material 13 by spraying a material excellent in non-wettability with the molten metal, that is, a property of repelling the molten metal.

【0011】このような素材としては、たとえばAl2
3 50%−Cr2 3 50%材などのセラミックや、
たとえばNi40%−グラファイト60%材などのグラ
ファイトを含む素材などが好適である。そして、このよ
うな素材からなる粉粒体を加熱して母材13の表面に溶射
することで、その粉粒体の表面が溶融して母材13の表面
や相互に付着し、それによってポーラスな層14が形成さ
れることになる。この層14における気孔率は50%程度
である。
Examples of such a material include Al 2
Ceramic or the like O 3 50% -Cr 2 O 3 50% material,
For example, a material containing graphite, such as a material containing 40% Ni and 60% graphite, is suitable. Then, by heating a powder or granular material made of such a material and spraying it on the surface of the base material 13, the surface of the powder or granular material is melted and adheres to the surface of the base material 13 or to each other, thereby making it porous. Layer 14 will be formed. The porosity of this layer 14 is about 50%.

【0012】そして、このポーラスな層14の表面に塗型
15を塗布すると、この塗型15の一部はポーラスな層14に
含浸される。このため、母材13に対する塗型15の密着力
が向上し、塗型15を一度塗布すると数十回の鋳込み作業
に耐える耐久性が得られる。また仮に塗型15が消耗して
も、母材13は、セラミックや、グラファイトを含む素材
などの耐熱性を有する素材にて構成されたポーラスな層
14で覆われているため、焼付きが発生することが無いと
いう利点がある。また母材13の表面にポーラスな層14が
形成されるため、断熱性が向上して、溶湯の熱が母材13
に伝わりにくくなり、このため母材13の熱変形が防止さ
れる。また本発明によれば、上述のような溶湯との非濡
れ性に優れた素材に代えて、銅などの軟質金属からなる
粉粒体を溶射することによっても、同等のポーラスな層
14が形成される。
Then, the surface of the porous layer 14 is painted.
When 15 is applied, part of this mold 15 is impregnated into the porous layer 14. For this reason, the adhesion of the coating mold 15 to the base material 13 is improved, and once the coating mold 15 is applied, the durability to withstand several tens of casting operations can be obtained. Even if the coating mold 15 is exhausted, the base material 13 is a porous layer made of a heat-resistant material such as ceramic or a material containing graphite.
Since it is covered with 14, there is an advantage that seizure does not occur. Further, since the porous layer 14 is formed on the surface of the base material 13, the heat insulating property is improved and the heat of the molten metal is transferred to the base material 13.
Is less likely to be transmitted to the base material 13, and thus the base material 13 is prevented from being thermally deformed. Further, according to the present invention, an equivalent porous layer can be obtained by spraying powder particles made of a soft metal such as copper, instead of the material excellent in non-wettability with the molten metal as described above.
14 are formed.

【0013】この軟質金属の溶射により形成されたポー
ラスな層14においても、同様の耐久性や断熱性が得られ
る。さらに、この軟質金属は熱衝撃に強く、シュート・
トラフ11を流れる溶湯から熱を受けても、それに応じた
伸縮を行うことで、クラックの発生が無いという特長が
ある。
The same durability and heat insulating property can be obtained also in the porous layer 14 formed by thermal spraying of this soft metal. Furthermore, this soft metal is resistant to thermal shock,
Even if it receives heat from the molten metal flowing through the trough 11, it expands and contracts according to the heat so that no cracks occur.

【0014】[0014]

【発明の効果】以上述べたように本発明によると、塗型
を含浸可能なポーラスな層を母材の表面に形成したた
め、塗型の密着性すなわち耐久性を向上させることがで
きて、一度の塗布で繰り返しの鋳込みに対応させること
が可能となり、しかも母材の表面にポーラスな層が形成
されるため、断熱性が向上して、溶湯の熱が母材に伝わ
りにくくなり、このため母材の熱変形を防止することが
できる。
As described above, according to the present invention, since the porous layer capable of impregnating the coating mold is formed on the surface of the base material, the adhesiveness of the coating mold, that is, the durability can be improved. It is possible to cope with repeated casting by coating, and since a porous layer is formed on the surface of the base material, heat insulation is improved and heat of the molten metal is less likely to be transferred to the base material. It is possible to prevent thermal deformation of the material.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例のシュート・トラフの横断面図
である。
FIG. 1 is a cross-sectional view of a chute trough according to an embodiment of the present invention.

【図2】従来のシュート・トラフを用いた鋳鉄管の遠心
鋳造装置の概略図である。
FIG. 2 is a schematic view of a conventional centrifugal casting apparatus for cast iron pipes using a chute trough.

【符号の説明】[Explanation of symbols]

11 シュート・トラフ 13 母材 14 ポーラスな層 15 塗型 11 Chute Trough 13 Base Material 14 Porous Layer 15 Coating

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 母材の表面に、塗型を含浸可能なポーラ
スな層を形成したことを特徴とする遠心鋳造装置のシュ
ート・トラフ。
1. A chute trough for a centrifugal casting apparatus, wherein a porous layer capable of impregnating a mold is formed on the surface of a base material.
【請求項2】 母材の表面に、溶湯との非濡れ性を有す
る素材の溶射によりポーラスな層を形成したことを特徴
とする請求項1記載の遠心鋳造装置のシュート・トラ
フ。
2. A chute trough for a centrifugal casting apparatus according to claim 1, wherein a porous layer is formed on the surface of the base material by thermal spraying of a material that is not wettable with the molten metal.
【請求項3】 母材の表面に、軟質金属の溶射によりポ
ーラスな層を形成したことを特徴とする請求項1記載の
遠心鋳造装置のシュート・トラフ。
3. A chute trough for a centrifugal casting apparatus according to claim 1, wherein a porous layer is formed on the surface of the base material by thermal spraying of a soft metal.
JP28462894A 1994-11-18 1994-11-18 Chute trough of centrifugal casting apparatus Pending JPH08141718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28462894A JPH08141718A (en) 1994-11-18 1994-11-18 Chute trough of centrifugal casting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28462894A JPH08141718A (en) 1994-11-18 1994-11-18 Chute trough of centrifugal casting apparatus

Publications (1)

Publication Number Publication Date
JPH08141718A true JPH08141718A (en) 1996-06-04

Family

ID=17680935

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28462894A Pending JPH08141718A (en) 1994-11-18 1994-11-18 Chute trough of centrifugal casting apparatus

Country Status (1)

Country Link
JP (1) JPH08141718A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111069557A (en) * 2019-12-24 2020-04-28 中钢集团邢台机械轧辊有限公司 Centrifugal roller outer layer pouring system and manufacturing method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111069557A (en) * 2019-12-24 2020-04-28 中钢集团邢台机械轧辊有限公司 Centrifugal roller outer layer pouring system and manufacturing method thereof
CN111069557B (en) * 2019-12-24 2022-06-17 中钢集团邢台机械轧辊有限公司 Centrifugal roller outer layer pouring system and manufacturing method thereof

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