JPH03119680A - Melting method for casting ingot - Google Patents
Melting method for casting ingotInfo
- Publication number
- JPH03119680A JPH03119680A JP25857389A JP25857389A JPH03119680A JP H03119680 A JPH03119680 A JP H03119680A JP 25857389 A JP25857389 A JP 25857389A JP 25857389 A JP25857389 A JP 25857389A JP H03119680 A JPH03119680 A JP H03119680A
- Authority
- JP
- Japan
- Prior art keywords
- frequency induction
- ingot
- induction heating
- crucible
- heating coil
- 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
- 238000005266 casting Methods 0.000 title claims abstract description 32
- 238000002844 melting Methods 0.000 title claims abstract description 12
- 230000008018 melting Effects 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 50
- 230000006698 induction Effects 0.000 claims abstract description 35
- 239000002184 metal Substances 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 229910001069 Ti alloy Inorganic materials 0.000 abstract description 3
- 229910052719 titanium Inorganic materials 0.000 abstract description 3
- 238000009750 centrifugal casting Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000005548 dental material Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
Landscapes
- General Induction Heating (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
ａ、産業上の利用分野
本発明は、坩堝内の鋳造用インゴットを高周波誘導加熱
コイルにて加熱して溶解するための方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a method for heating and melting a casting ingot in a crucible using a high-frequency induction heating coil.
ｂ、従来の技術
遠心鋳造装置に用いられる坩堝としては一般にマグネシ
アやカルシア等の材質から成るものが用いられ、金属材
から成る鋳型用インゴットを坩堝内で加熱して溶解する
ようにしている０通常、坩堝内で鋳造用インゴットを加
熱して溶解する方法の一つとして高周波誘導加熱コイル
が広く用いられている。b. Conventional technology Crucibles used in centrifugal casting equipment are generally made of materials such as magnesia or calcia, and a mold ingot made of a metal material is heated and melted within the crucible. A high-frequency induction heating coil is widely used as a method of heating and melting a casting ingot in a crucible.
第６図は高周波誘導加熱コイルを用いた従来の溶解方法
を示すものである。従来では、坩堝１の凹部２内に鋳造
用インゴット３を入れた後に、螺旋状に巻回された高周
波誘導加熱コイル４を坩堝１に対して相対的に昇降させ
、このコイル４にて坩堝１ひいては鋳造用インゴット３
を取り囲んだ状態にしてコイル４に高周波電流を供給す
ることにより、鋳造用インゴット３を高周波誘導加熱作
用にて加熱・溶解するようにしていた。そして、坩堝１
内の溶湯を図外の鋳型に注湯して鋳造製品を得るように
していた。FIG. 6 shows a conventional melting method using a high frequency induction heating coil. Conventionally, after placing the casting ingot 3 into the recess 2 of the crucible 1, a spirally wound high-frequency induction heating coil 4 is moved up and down relative to the crucible 1, and the coil 4 heats the crucible 1. In addition, casting ingot 3
By supplying a high frequency current to the coil 4 surrounding the coil 4, the casting ingot 3 is heated and melted by high frequency induction heating. And crucible 1
The molten metal inside was poured into a mold (not shown) to obtain a cast product.
Ｃ０発明が解決しようとする課題
しかしながら、上述の如く、坩堝１を取り囲むように高
周波誘導加熱コイル４を配置して坩堝ｌ内の鋳造用イン
ゴット３を加熱・溶解するようにした方法では、次のよ
うな問題があった。C0 Problems to be Solved by the Invention However, as described above, the method in which the high-frequency induction heating coil 4 is arranged to surround the crucible 1 to heat and melt the casting ingot 3 in the crucible 1 has the following problems. There was a problem like this.
すなわち、高周波誘導加熱コイル４は坩堝１を介して鋳
造用インゴット３に対応配置されるため、コイル４とイ
ンゴット３との間の距離がどうしても長くなり、これに
起因して加熱効率が非常に悪くなるという問題点があっ
た。しかも、鋳造用インゴット３を最適な溶解温度範囲
内に加熱するのが非常に困難であった。That is, since the high-frequency induction heating coil 4 is placed in correspondence with the casting ingot 3 via the crucible 1, the distance between the coil 4 and the ingot 3 inevitably becomes long, resulting in very poor heating efficiency. There was a problem with that. Furthermore, it was extremely difficult to heat the casting ingot 3 to within the optimum melting temperature range.
本発明はこのような問題を解消するためになされたもの
であって、その目的は、簡単な手段により鋳造用インゴ
ットを効率良くしかも最適な溶解温度に均一に高周波誘
導加熱することができるような方法を提供することにあ
る。The present invention has been made to solve these problems, and its purpose is to provide a method that enables casting ingots to be efficiently and uniformly heated by high-frequency induction to the optimum melting temperature using simple means. The purpose is to provide a method.
Ｃ６課題を解決するための手段
上述の目的を達成するために、本発明では、広い面積の
上面を有する薄板状の鋳造用インゴットを坩堝内に入れ
、この鋳造用インゴットの上面に高周波誘導加熱コイル
を対向配置して前記鋳造用インゴットを高周波誘導加熱
作用により溶解せしめるようにしている。Means for Solving Problem C6 In order to achieve the above-mentioned object, in the present invention, a thin plate-shaped casting ingot having a wide upper surface area is placed in a crucible, and a high-frequency induction heating coil is installed on the upper surface of the casting ingot. are disposed facing each other so that the casting ingot is melted by high-frequency induction heating.
以下、本発明の一実施例に付き図面を参照して説明する
。Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第１図は本発明に係る遠心鋳造装置を示すものであって
、銅製の坩堝１及び燐酸塩石膏製の鋳型２が回転アーム
５の一端に取付けられると共に、回転アーム５の他端に
は坩堝１及び鋳型２とつり合うバランス錘６が取付けら
れており、これにより回転体７が構成されている。そし
て、この回転体７は支持部材８にて回転自在に軸支され
た回転軸９の上端に支持され、回転軸９の下端がベルト
１０を介して電動機１１に連結されている。FIG. 1 shows a centrifugal casting apparatus according to the present invention, in which a copper crucible 1 and a phosphate gypsum mold 2 are attached to one end of a rotating arm 5, and a crucible is attached to the other end of the rotating arm 5. A balance weight 6 is attached to balance the mold 1 and the mold 2, thereby forming a rotating body 7. The rotating body 7 is supported by the upper end of a rotating shaft 9 rotatably supported by a support member 8, and the lower end of the rotating shaft 9 is connected to an electric motor 11 via a belt 10.
また、坩堝１の上面側にはインゴット収容用凹部１２が
設けられており、この凹部１２の上方箇所に高周波誘導
加熱゛コイル１３が配置されている。このコイル１３は
、第２図に示すように、同一平面内において渦巻き状に
巻回された加熱部１３ａと、この加熱部１３ａの両端に
それぞれ連結された一対のリード部１３ｂ、 １３ｃと
から成り、これらのリード部１３ｂ、１３ｃはフレキシ
ブルリード線１４を介して高周波電源１５に接続されて
いる。そして、このコイル１３は昇降手段１６によって
上下方向に昇降可能に構成されている。Further, an ingot accommodating recess 12 is provided on the upper surface side of the crucible 1, and a high frequency induction heating coil 13 is disposed above the recess 12. As shown in FIG. 2, this coil 13 consists of a heating part 13a that is spirally wound in the same plane, and a pair of lead parts 13b and 13c that are respectively connected to both ends of this heating part 13a. , these lead portions 13b and 13c are connected to a high frequency power source 15 via a flexible lead wire 14. This coil 13 is configured to be able to be raised and lowered in the vertical direction by means of a lifting means 16.
次に、上述の遠心鋳造装置を用いてチタン又はチタン合
金等の歯科用材料を精密鋳造する場合に付き説明する。Next, a case in which dental materials such as titanium or titanium alloys are precision cast using the above-mentioned centrifugal casting apparatus will be explained.
まず、上面３ａの面積が広い薄板状（例えば円板状）の
チタン又はチタン合金製の鋳造用インゴット３を用意し
、このインゴット３を第３図に示す如く坩堝１の凹部１
２内に収容して凹部１２の底面上に載置する。First, a thin plate-shaped (for example, disc-shaped) titanium or titanium alloy casting ingot 3 having a large upper surface 3a is prepared, and this ingot 3 is inserted into the recess 1 of the crucible 1 as shown in FIG.
2 and placed on the bottom surface of the recess 12.
しかる後、昇降手段１６を作動させることにより高周波
誘導加熱コイル１３を下降させてその加熱部１３ａを鋳
造用インゴット３の上面３ａに対して僅かな距離を隔て
た位置に対向配置せしめる（第３図参照）、そして、こ
の状態の下で高周波電源１５から高周波誘導加熱コイル
４に高周波電流を供給することにより、鋳造用インゴッ
ト３を高周波誘導加熱して溶解せしめる。溶解後、直ち
に、高周波誘導加熱コイル１３を上昇させ、上昇完了直
後に電動機１１を駆動させることにより回転アーム５を
坩堝１及び鋳型２と共に回転軸９を中心に高速で回転駆
動させる。これに伴い坩堝ｌの凹部１２内の溶湯が遠心
力にて鋳型内に注湯されて自然冷却され、所定形状の鋳
造製品が得られる。Thereafter, the high-frequency induction heating coil 13 is lowered by operating the elevating means 16, and the heating section 13a is disposed opposite to the upper surface 3a of the casting ingot 3 at a slight distance away (Fig. 3). ), and under this condition, a high frequency current is supplied from the high frequency power supply 15 to the high frequency induction heating coil 4, thereby melting the casting ingot 3 by high frequency induction heating. Immediately after melting, the high-frequency induction heating coil 13 is raised, and immediately after the raising is completed, the electric motor 11 is driven to rotate the rotating arm 5 together with the crucible 1 and the mold 2 at high speed around the rotating shaft 9. Accordingly, the molten metal in the recess 12 of the crucible 1 is poured into the mold by centrifugal force and naturally cooled, thereby obtaining a cast product of a predetermined shape.
本実施例によれば、既述の如く銅製の坩堝１を用いてい
るので、坩堝１と溶湯金属との間に酸化反応による材質
劣化を生じることがなく、品質の良好な鋳造製品を得る
ことができる。なおこの際、坩堝１が銅製であるため、
従来のように螺旋状の高周波誘導加熱コイル４（第５図
参照）にて坩堝１の周囲を取り囲んで鋳造用インゴット
３を高周波誘導加熱しようとすると坩堝１自体が高温に
加熱されてしまうので、従来の方法は採用できない。そ
こで、本実施例では、高周波誘導加熱コイル１３を鋳造
用インゴット３に直接的に対向配置させてこれを加熱・
溶解せしめるようにしているのである。According to this embodiment, as described above, since the copper crucible 1 is used, material deterioration due to oxidation reaction does not occur between the crucible 1 and the molten metal, and a cast product of good quality can be obtained. I can do it. At this time, since the crucible 1 is made of copper,
If it is attempted to heat the casting ingot 3 by high-frequency induction by surrounding the crucible 1 with a spiral high-frequency induction heating coil 4 (see FIG. 5) as in the past, the crucible 1 itself will be heated to a high temperature. Traditional methods cannot be used. Therefore, in this embodiment, the high frequency induction heating coil 13 is placed directly opposite the casting ingot 3 to heat and heat it.
This is to allow it to dissolve.
以上、本発明の一実施例に付き述べたが、本発明は既述
の実施例に限定されるものではなく、本発明の技術的思
想に基いて各種の変更が可能である。Although one embodiment of the present invention has been described above, the present invention is not limited to the embodiment described above, and various modifications can be made based on the technical idea of the present invention.
例えば、既述の実施例では、高周波誘導加熱コイル１３
の加熱部１３ａを渦巻き状にしたが、これに限らず、第
４図又は第５図に示すような形状に構成してもよい、ま
た鋳造用インゴット３の形状は、円板状に限らず、薄板
状のものであれば、四角形や楕円形等の各種の形状であ
ってよい。For example, in the embodiment described above, the high frequency induction heating coil 13
Although the heating part 13a is spirally shaped, the shape is not limited to this, and may be configured as shown in FIG. 4 or FIG. 5. Also, the shape of the casting ingot 3 is not limited to the disk shape. As long as it is thin plate-like, it may have various shapes such as a rectangle or an ellipse.
また、坩堝１は銅製のものである必要は必ずしもなく、
マグネシアやカルシア等から成る坩堝の場合にも本発明
を適用し得ることは言う迄もない。Furthermore, the crucible 1 does not necessarily have to be made of copper;
It goes without saying that the present invention can also be applied to crucibles made of magnesia, calcia, etc.
ｅ０発明の効果
以上の如く、本発明は、広い面積の上面を有する薄板状
の鋳造用インゴットの上面に高周波誘導加熱コイルを対
向配置してこのインゴットを高周波誘導加熱作用により
溶解せしめるようにしたものであるから、次のような実
用的な作用効果を奏する。e0 Effects of the Invention As described above, the present invention is such that high-frequency induction heating coils are disposed opposite to the upper surface of a thin plate-shaped casting ingot having a large upper surface area, and this ingot is melted by high-frequency induction heating action. Therefore, the following practical effects are achieved.
すなわち、鋳造用インゴットに高周波誘導加熱コイルを
直接的に対向配置せしめていわゆる平面加熱による溶解
を行なうようにしたので、鋳造用インゴットと高周波誘
導加熱コイルとの間の間隔を従来の場合より狭くするこ
とが可能となり、加熱効率の大幅な改善を図ることがで
きる。さらに、鋳造用インゴットは薄板状のものである
ため、加熱時における鋳造用インゴットの上面部と下面
部との間に大きな温度差を生じることがなく、実質的に
均一な加熱を行なうことができる。また、加熱温度の設
定も容易となる。That is, since the high-frequency induction heating coil is arranged directly opposite the casting ingot to perform melting by so-called plane heating, the interval between the casting ingot and the high-frequency induction heating coil can be narrower than in the conventional case. This makes it possible to significantly improve heating efficiency. Furthermore, since the casting ingot is in the form of a thin plate, there is no large temperature difference between the upper and lower surfaces of the casting ingot during heating, allowing substantially uniform heating. . Moreover, setting of the heating temperature becomes easy.
さらに、上述の作用効果と相俟って、うず電流による溶
湯の攪拌作用があること、並びに真空中での加熱が可能
でピンホールの発生のおそれがないこと（アルゴンガス
等の雰囲気中でのアーク放電による場合はアルゴンガス
等の存在がピンホール発生原因となる）等の高周波誘導
加熱に特有の作用効果を奏し得るため、品質の良い鋳造
製品を得ることができる。Furthermore, in conjunction with the above-mentioned effects, the molten metal can be stirred by eddy current, and it can be heated in a vacuum without the risk of pinholes (in an atmosphere of argon gas, etc.). In the case of arc discharge, the presence of argon gas causes pinholes, etc.) Since high-frequency induction heating can produce effects unique to high-frequency induction heating, it is possible to obtain high-quality cast products.
第１図〜第３図は本発明の一実施例を説明するためのも
のであって、第１図は遠心鋳造装置の概略正面図、第２
図は高周波誘導加熱コイルの斜視図、第３図は加熱時に
おける坩堝、鋳造用インゴット及び高周波誘導加熱コイ
ルを示す縦断面図、第４図及び第５図は高周波誘導加熱
コイルの別個をそれぞれ示す斜視図、第６図は従来の遠
心鋳造装置の要部断面図である。
１・・・坩堝、 ２・・・鋳型、３・・
・鋳造用インゴット、 ３ａ・・・上面、５・・・回
転アーム、
１２・・・インゴット収容用凹部、
１３・・・高周波誘導加熱コイル、１３ａ・・・加熱部
、１３ｂ、 １３ｃ・・・リード部、 １６・・・
昇降手段。
第１図1 to 3 are for explaining one embodiment of the present invention, in which FIG. 1 is a schematic front view of a centrifugal casting apparatus, and FIG.
The figure is a perspective view of the high-frequency induction heating coil, Figure 3 is a longitudinal cross-sectional view showing the crucible, casting ingot, and high-frequency induction heating coil during heating, and Figures 4 and 5 show the high-frequency induction heating coil separately. The perspective view and FIG. 6 are sectional views of essential parts of a conventional centrifugal casting apparatus. 1... Crucible, 2... Mold, 3...
- Casting ingot, 3a...Top surface, 5...Rotating arm, 12...Ingot storage recess, 13...High frequency induction heating coil, 13a...Heating part, 13b, 13c... Lead Part, 16...
Lifting means. Figure 1
Claims (1)
坩堝内に入れ、この鋳造用インゴットの上面に高周波誘
導加熱コイルを対向配置して前記鋳造用インゴットを高
周波誘導加熱作用により溶解せしめるようにしたことを
特徴とする鋳造用インゴットの溶解方法。A thin plate-shaped casting ingot having a wide upper surface area is placed in a crucible, and a high-frequency induction heating coil is disposed opposite to the upper surface of the casting ingot, so that the casting ingot is melted by high-frequency induction heating action. A method for melting an ingot for casting, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25857389A JP2854037B2 (en) | 1989-10-03 | 1989-10-03 | Melting method of casting ingot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25857389A JP2854037B2 (en) | 1989-10-03 | 1989-10-03 | Melting method of casting ingot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03119680A true JPH03119680A (en) | 1991-05-22 |
| JP2854037B2 JP2854037B2 (en) | 1999-02-03 |
Family
ID=17322125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25857389A Expired - Lifetime JP2854037B2 (en) | 1989-10-03 | 1989-10-03 | Melting method of casting ingot |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2854037B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009058894A3 (en) * | 2007-10-29 | 2009-07-09 | Inductotherm Corp | Electric induction heating and melting of an electrically conductive material in a containment vessel |
| CN106513620A (en) * | 2015-09-15 | 2017-03-22 | 现代自动车株式会社 | Molten metal pouring device and centrifugal casting machine using the same |
-
1989
- 1989-10-03 JP JP25857389A patent/JP2854037B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009058894A3 (en) * | 2007-10-29 | 2009-07-09 | Inductotherm Corp | Electric induction heating and melting of an electrically conductive material in a containment vessel |
| CN106513620A (en) * | 2015-09-15 | 2017-03-22 | 现代自动车株式会社 | Molten metal pouring device and centrifugal casting machine using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2854037B2 (en) | 1999-02-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4178986A (en) | Furnace for directional solidification casting | |
| JP2831625B2 (en) | How to melt and cast metal in a mold | |
| US3841384A (en) | Method and apparatus for melting and casing metal | |
| US5003551A (en) | Induction melting of metals without a crucible | |
| US3678988A (en) | Incorporation of dispersoids in directionally solidified castings | |
| JP2854037B2 (en) | Melting method of casting ingot | |
| JP3075302B2 (en) | Precision casting equipment | |
| JP3041080B2 (en) | Precision casting equipment | |
| US3504148A (en) | Method and apparatus for producing bimetallic articles by inductive heating and positioning means | |
| JP2788736B2 (en) | Casting method | |
| JP2002224249A (en) | Method of manufacturing golf club head | |
| US20110247364A1 (en) | Process for producing multicrystalline silicon ingots by the induction method and apparatus for carrying out the same | |
| US5275229A (en) | Magnetic suspension melting apparatus | |
| US3544757A (en) | Method of melting a levitated mass | |
| JP2788737B2 (en) | Casting method | |
| JPH0494859A (en) | Apparatus for precisely casting metal | |
| JPH0531571A (en) | Method and apparatus for manufacturing casting | |
| JPH04182052A (en) | Precise casting device for ti or ti base alloy | |
| JPH0422562A (en) | Precision casting method for ti, ti alloy and precision casting device | |
| JPH06182525A (en) | Method and device for melting and pouring active metal | |
| JP2517975B2 (en) | Molten metal solidification method | |
| JPH0335865A (en) | Method and apparatus for precision casting | |
| EP0641146B1 (en) | Magnetic suspension melting apparatus | |
| CA2371805C (en) | Method and device for moulding titanium parts | |
| JP2928366B2 (en) | Apparatus and method for casting casting material |