JPH07155904A - Device for producing half-solidified metal - Google Patents

Abstract

PURPOSE:To continuously produce a half-solidified metal having high solid phase ratio at a low cost by covering with a refractory on the end parts of a cylindrical barrel peripheral surface of an agitating rotor. CONSTITUTION:In the producing device for the half-solidified metal using the agitating rotor composed of a horizontal axial cylindrical barrel, in which the half-solidified metal having high solid phase ratio is easily and continuously discharged, and having good heat removing performance, the refractory covers 1'a are arranged on the end parts of the cylindrical barrel 1' peripheral surface of the agitating rotor. Then the main component of this refractory cover 1'a is made to be Al2O3, SiO2 or ZrO2 and the thickness of the cover is made to be about 1mm. By this method, as the end parts of the barrel peripheral surface having insufficient water cooling effect is not brought into direct contact with molten metal, the excess temp. increase at the end part of the cylindrical barrel can be prevented. Further, the sticking of molten metal to the end parts of the barrel peripheral surface and the generation of crack on the barrel peripheral surface are prevented and the service life of the agitation rotor is extended.

Description

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

【０００１】[0001]

【産業上の利用分野】この発明は、非樹枝状初晶が金属
（一般には合金）液体中に分散した固体−液体金属混合
物（以下単に半凝固金属という）を安価に連続して安定
的に製造・排出する半凝固金属の製造装置を提案するも
のである。半凝固金属は、下流の加工工程における加工
装置の熱的負荷を低減させたり、そのまま棒状又は板状
などの半成品として凝固させることにより内部品質の良
好な加工用素材が得られるなど、その有用性から経済性
に優れる安定した半凝固金属の工業的生産技術の開発が
望まれている。BACKGROUND OF THE INVENTION The present invention relates to a solid-liquid metal mixture (hereinafter simply referred to as a semi-solid metal) in which non-dendritic primary crystals are dispersed in a metal (generally an alloy) liquid, which can be continuously and stably maintained at low cost. It proposes an apparatus for producing semi-solidified metal that is produced and discharged. Semi-solidified metal is useful because it can reduce the thermal load on the processing equipment in the downstream processing step and can be solidified as a semi-finished product such as a rod or plate as it is to obtain a processing material with good internal quality. Therefore, there is a demand for the development of a stable, semi-solid metal industrial production technology which is excellent in economic efficiency.

【０００２】[0002]

【従来の技術】半凝固金属を連続的に製造する手段とし
ては、例えば特公昭56−20944 号公報（非樹枝状初晶固
体分を含む合金を連続的に形成する為の装置）に開示さ
れているように、一定温度の溶融金属を円筒状の冷却槽
内面と高速回転する攪拌子との間に導き、適当な冷却条
件の下で溶融金属に強い攪拌作用を加えて半凝固金属ス
ラリーとし、底部のノズルから半凝固金属として連続的
に排出させる機械攪拌方式のものが知られている。2. Description of the Related Art A means for continuously producing a semi-solid metal is disclosed in, for example, Japanese Patent Publication No. Sho 56-20944 (apparatus for continuously forming an alloy containing non-dendritic primary crystal solids). As shown in Fig. 1, a molten metal at a constant temperature is introduced between the inner surface of a cylindrical cooling tank and a stirrer rotating at high speed, and a strong stirring action is applied to the molten metal under appropriate cooling conditions to produce a semi-solidified metal slurry. There is known a mechanical stirring method in which semi-solidified metal is continuously discharged from the nozzle at the bottom.

【０００３】この半凝固金属中の固相粒（非樹枝状初晶
粒）は、溶融金属を冷却しながら激しく攪拌することに
よって、融体中に生成しつつある樹枝状初晶の枝部が消
失ないしは縮小して丸みを帯びた形態に変換されて形成
さる。そして半凝固金属は非樹枝状初晶粒の粒径が小さ
なものほど、また固相率が高いものほどその特性が優
れ、そのためには溶融金属を強冷却する必要があり、こ
のように強冷却された半凝固金属はその固相率の増大と
ともに見かけ粘性が非常に大きくなり流動性が低下する
ため、上記手段では高固相率の半凝固金属の連続排出が
困難になるという問題がある。The solid-phase grains (non-dendritic primary crystal grains) in the semi-solid metal have a branch portion of the dendritic primary crystals that are being produced in the melt by violently stirring the molten metal while cooling. It disappears or shrinks and is converted to a rounded form. The properties of semi-solidified metal are better as the particle size of non-dendritic primary grains is smaller and as the solid fraction is higher.For that purpose, it is necessary to strongly cool the molten metal. Since the apparent solidity of the thus-prepared semi-solidified metal becomes extremely large and the fluidity thereof deteriorates, the above means has a problem that it is difficult to continuously discharge the semi-solidified metal having a high solid fraction.

【０００４】一方、同じ機械的な攪拌手段で、抜熱能を
有する横軸円筒胴よりなる攪拌子（攪拌用回転子）とこ
の攪拌子の円筒胴の外周に沿う凹曲面からなる固定壁と
の間に形成した隙間に溶融金属を連続的に供給し、該隙
間内にて強制冷却による凝固を生起させながら攪拌子の
回転に基づくせん断力によって粒子の細かい非樹枝状初
晶が懸濁した半凝固金属を製造する手段が特開平４−２
３８６４５号公報（半凝固金属の製造方法および装置）
に提案開示されている。この手段は、攪拌子の直径と回
転数の選択により、充分な冷却速度とせん断効果を与え
ることが可能であり、かつ半凝固金属の排出方向に攪拌
子を回転させるため、粘性の高い（高固相率）半凝固金
属の排出を促進して連続排出を容易にする優れた手段で
ある。On the other hand, with the same mechanical stirring means, a stirrer (stirring rotor) composed of a horizontal axis cylindrical cylinder having heat removal capability and a fixed wall composed of a concave curved surface along the outer periphery of the cylindrical cylinder of this stirrer are used. Molten metal is continuously supplied to the gap formed between the two, and the semi-suspended fine non-dendritic primary crystals of the particles are generated by the shearing force based on the rotation of the stirrer while causing solidification by forced cooling in the gap. A means for producing solidified metal is disclosed in Japanese Patent Laid-Open No. 4-2.
38645 (Method and apparatus for producing semi-solidified metal)
Proposed and disclosed. This means can give a sufficient cooling rate and a shearing effect by selecting the diameter and the number of rotations of the stirrer, and rotates the stirrer in the discharging direction of the semi-solidified metal, so that it has high viscosity (high Solid phase ratio) It is an excellent means for facilitating the discharge of semi-solidified metal and facilitating continuous discharge.

【０００５】しかし、抜熱能を有する攪拌子の円筒胴は
内部水冷構造であり、その円筒胴周囲面（抜熱面）の長
さ方向両端部には水冷効果が十分でない部分が生じる。However, the cylindrical body of the stirrer having a heat removing capability has an internal water cooling structure, and portions at which the water cooling effect is not sufficient occur at both ends in the longitudinal direction of the peripheral surface (heat removing surface) of the cylindrical body.

【０００６】なお、攪拌子の円筒胴とその軸部は、異な
る要求特性、コスト低減などのため異なった材質の金属
が用いられ、これらは円筒胴の両側面で溶接する構造に
なっている。The cylindrical body of the stirrer and its shaft are made of different materials for different required characteristics and cost reduction, and these are welded on both sides of the cylindrical body.

【０００７】したがって、攪拌子と固定壁との間に溶融
金属を供給すると、攪拌子の端部の水冷効果が十分でな
い部分の円筒胴周面の温度が上昇し、さらに端部胴周面
で供給した溶融金属が円筒胴金属と合金を造って溶着
し、そのメンテナンスに多くの時間を要する問題、円筒
胴の中央部と端部との温度差によく熱歪で円筒胴周面に
亀裂が発生し、攪拌子の寿命を著しく低下させる問題な
どがあった。Therefore, when the molten metal is supplied between the stirrer and the fixed wall, the temperature of the cylindrical body peripheral surface at the portion where the water cooling effect at the end portion of the stirrer is not sufficient rises, and further, at the end body peripheral surface. The supplied molten metal forms an alloy with the cylinder body metal and welds it, and it takes a lot of time for its maintenance.The temperature difference between the center and the end of the cylinder body is good and cracks occur on the cylinder body peripheral surface due to thermal strain. However, there is a problem in that the life of the stirrer is significantly reduced.

【０００８】[0008]

【発明が解決しようとする課題】したがって、この発明
は、高固相率の半凝固金属の連続排出が容易な横軸円筒
胴よりなり抜熱能を有する攪拌用回転子を用いる半凝固
金属の製造装置において、前記した問題点を有利に解決
し、攪拌用回転子の端部円筒胴周面における溶融金属の
溶着及び円筒胴周面における亀裂の発生を防止し、攪拌
用回転子の整備時間の短縮及び寿命延長など製造コスト
の低減がはかれる半凝固金属の製造装置を提案すること
を目的とする。SUMMARY OF THE INVENTION Therefore, the present invention is directed to the production of semi-solidified metal using a stirring rotor having a horizontal axis cylindrical cylinder capable of continuously discharging a high solid-phase semi-solidified metal and having a heat removal capability. In the device, the problems described above are advantageously solved, welding of molten metal on the peripheral surface of the end cylinder of the stirring rotor and generation of cracks on the peripheral surface of the cylindrical body are prevented, and the maintenance time of the stirring rotor is reduced. It is an object of the present invention to propose a semi-solidified metal manufacturing apparatus capable of reducing manufacturing costs such as shortening and extension of life.

【０００９】[0009]

【課題を解決するための手段】この発明の要旨は以下の
通りである。横軸円筒胴よりなり抜熱能を有する攪拌用
回転子と、該回転子の円筒胴周に面して下せばまりの凹
曲面からなる固定壁との間に溶融金属を連続的に供給
し、凝固を生起させながら攪拌用回転子の回転に基づく
せん断力によって粒子の細かい非樹枝状晶が懸濁した半
凝固金属を製造して、攪拌用回転子と固定壁との間の下
方のすき間に連なる排出口から半凝固金属を連続的に排
出する半凝固金属の製造装置において、攪拌用回転子円
筒胴の端部胴周面に耐火物を被覆してなる半凝固金属の
製造装置であり、さらに、上記耐火物の主成分を、Al₂O
₃, SiO₂, CaO又はZrO₂とするものである。The summary of the present invention is as follows. A molten metal is continuously supplied between a stirring rotor having a heat-dissipating ability, which is composed of a horizontal axis cylindrical cylinder, and a fixed wall, which is a concave curved surface that is fitted downward to face the circumference of the cylindrical cylinder of the rotor. , A semi-solid metal in which fine dendrites of fine particles are suspended by shearing force based on the rotation of the stirring rotor while causing solidification is produced, and a lower clearance between the stirring rotor and the fixed wall is produced. A semi-solid metal manufacturing apparatus for continuously discharging semi-solid metal from a discharge port connected to, a semi-solid metal manufacturing apparatus in which a refractory is coated on an end cylinder peripheral surface of a stirring rotor cylindrical cylinder. In addition, the main component of the refractory is Al ₂ O
₃ , SiO ₂ , CaO or ZrO ₂ .

【００１０】[0010]

【作用】この発明の経緯とその作用について述べる。高
固相率の半凝固金属の連続排出が容易な、横軸円筒胴よ
りなり抜熱能を有する攪拌用回転子を用いる半凝固金属
の製造装置により半凝固金属を製造すると、前記したよ
うに、水冷効果が不十分な攪拌用回転子円筒胴の長さ方
向端部は温度が過度に上昇し、端部胴周面に溶融金属が
溶着すること、円筒胴中央部と端部の温度差により胴周
面上に亀裂が発生することなどが明らかとなり、攪拌用
回転子の寿命が著しく低下することから工業的に使用す
るはなお改善の余地を残していた。The background of the present invention and its operation will be described. Continuous discharge of semi-solidified metal with high solid fraction is easy, when the semi-solidified metal is manufactured by a semi-solidified metal manufacturing apparatus using a stirring rotor having a horizontal axis cylindrical cylinder and having heat removal capability, as described above, The temperature rises excessively at the longitudinal end of the stirring rotor cylindrical cylinder where the water cooling effect is insufficient, and molten metal is welded to the peripheral surface of the end cylinder due to the temperature difference between the center and the end of the cylindrical cylinder. It became clear that cracks were generated on the peripheral surface of the body, and the life of the stirring rotor was remarkably reduced, so there was still room for improvement in industrial use.

【００１１】そこで、上記問題を解決する手段として、
実験検討を重ねた結果、攪拌用回転子円筒胴の端部胴周
面に耐火物を被覆することが好適であることを見出し
た。かくすることにより、水冷効果が不十分な端部胴周
面は直接溶融金属が触れないため、円筒胴端部温度の過
度の上昇を防止でき、胴周面端部における溶融金属の溶
着や、胴周面の亀裂の発生を阻止して攪拌用回転子の寿
命を著しく延長させることができる。したがって、大幅
なコストダウンが可能となり、高固相率の半凝固金属を
安価に連続して製造することができるようになる。Therefore, as a means for solving the above problem,
As a result of repeated experiments and studies, it was found that it is preferable to coat the end cylinder peripheral surface of the stirring rotor cylindrical cylinder with a refractory material. By doing so, since the molten metal does not directly contact the end body peripheral surface where the water cooling effect is insufficient, it is possible to prevent an excessive rise in the temperature of the cylinder body end portion, and the welding of the molten metal at the body peripheral surface end portion, The life of the stirring rotor can be remarkably extended by preventing the occurrence of cracks on the circumferential surface of the body. Therefore, the cost can be significantly reduced, and the semi-solidified metal having a high solid fraction can be continuously manufactured at low cost.

【００１２】[0012]

【実施例】図１に横軸円筒胴よりなる攪拌用回転子を用
いる連続式半強固金属製造装置の説明図を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a continuous semi-solid metal manufacturing apparatus using a stirring rotor composed of a horizontal cylinder.

【００１３】図１において、１は横軸円筒胴よりなり抜
熱能を有する攪拌用回転子、２は攪拌用回転子１を冷却
するための冷却水、３は攪拌用回転子１の回転駆動装
置、４−１は耐火物製の固定壁、４−２は耐火物製の塞
壁、５は攪拌用回転子１と固定壁４−１及び塞壁４−２
とより形成される冷却・攪拌室、６は固定壁４−１を断
熱するためのヒーター、７はヒーターホルダー、８は攪
拌用回転子１との間隔を調整するための固定壁４−１の
移動駆動装置、９はせき板、10は攪拌用回転子１との間
隔を調整するためのせき板しゅう動駆動装置、11は攪拌
用回転子１の円筒胴周面に付着成長する凝固殻18を切削
するための削剥治具、12は攪拌用回転子１との間隔を調
整するための削剥治具11の移動駆動装置、13は排出口、
14は排出される半凝固金属19の固相率センサーであり、
さらに15は取鍋、16は注入ノズル、17は溶融金属であ
る。In FIG. 1, reference numeral 1 is a stirring rotor having a horizontal axis cylindrical cylinder and capable of removing heat, 2 is cooling water for cooling the stirring rotor 1, and 3 is a rotation driving device for the stirring rotor 1. 4-1 is a fixed wall made of refractory material, 4-2 is a closed wall made of refractory material, 5 is a rotor 1 for stirring, a fixed wall 4-1 and a closed wall 4-2.
And 6 are heaters for insulating the fixed wall 4-1 from each other, 7 is a heater holder, and 8 is a fixed wall 4-1 for adjusting the gap between the fixed wall 4-1 and the stirring rotor 1. A moving drive device, 9 is a weir plate, 10 is a weir plate slide drive device for adjusting the distance from the stirring rotor 1, and 11 is a solidified shell 18 that adheres to and grows on the circumferential surface of the cylindrical body of the stirring rotor 1. A scraping jig for cutting the blade, 12 a movement driving device for the scraping jig 11 for adjusting the distance between the stirring rotor 1 and the stirring rotor 1, 13 an outlet,
14 is a solid-phase sensor for the semi-solid metal 19 to be discharged,
Further, 15 is a ladle, 16 is an injection nozzle, and 17 is a molten metal.

【００１４】また、図２は従来例の攪拌用回転子の軸方
向断面の説明図、図３は円筒動周端部に耐火物を被覆し
たこの発明に適合する攪拌用回転子の軸方向断面の説明
図である。FIG. 2 is an explanatory view of an axial cross section of a conventional stirring rotor, and FIG. 3 is an axial cross section of a stirring rotor according to the present invention in which a cylindrical dynamic peripheral end is coated with a refractory material. FIG.

【００１５】図２及び図３において、１′は攪拌用回転
子１の円筒胴、20は攪拌用回転子１の軸であり、21は軸
20の外周に設けたスパイラル状の溝で、この溝21に冷却
水２を流すことによって円筒胴１′を冷却する。なお、
Ａは円筒胴１′と軸20の溶接部を示す。そして図３の
１′ａは円筒胴１′の端部胴周面に被覆した耐火物であ
る。In FIGS. 2 and 3, 1'is a cylindrical body of the stirring rotor 1, 20 is a shaft of the stirring rotor 1, and 21 is a shaft.
A cylindrical groove 1'is cooled by flowing cooling water 2 through the groove 21 in a spiral groove provided on the outer circumference of 20. In addition,
A indicates a welded portion of the cylindrical body 1'and the shaft 20. Reference numeral 1'a in FIG. 3 is a refractory material coated on the peripheral surface of the end cylinder of the cylindrical cylinder 1 '.

【００１６】上記した図１の連続式半強固金属製造装置
を使用し、かつ、その攪拌用回転子１に図２（従来例）
又は図３（適合例）に示した構造のものをそれぞれ用
い、Ｃ：2.5mass ％鋳鉄（液相線温度：1340℃、固相線
温度：1130℃）の半凝固金属500kg を連続して製造し
た。The continuous semi-hard metal manufacturing apparatus of FIG. 1 described above is used, and the stirring rotor 1 of FIG. 2 (conventional example) is used.
Or, using each of the structures shown in Fig. 3 (Compatible example), 500 kg of semi-solidified metal of C: 2.5 mass% cast iron (liquidus temperature: 1340 ° C, solidus temperature: 1130 ° C) is continuously manufactured. did.

【００１７】上記において、図２及び図３の攪拌用回転
子１は、軸20をＳＵＳ304 ステンレス鋼製、円筒胴１′
をSUS 403 ステンレス鋼製とし、図３の耐火物被覆１′
ａは、Al₂O₃ 主体の耐火剤（パーマタイト）を厚さ：１
_mmに塗布することにより被覆した。In the above, the stirring rotor 1 shown in FIGS. 2 and 3 has a shaft 20 made of SUS304 stainless steel and a cylindrical body 1 '.
Is made of SUS 403 stainless steel, and the refractory coating 1'of FIG. 3 is used.
a is a refractory (permatite) mainly composed of Al ₂ O _{3 and} has a thickness of 1
_The coating was performed by applying a coating film of _mm .

【００１８】そして、円筒胴１′の寸法は外径：400mm
、幅：135mm 、厚さ：15mmとし、操業の際には溝21に
冷却水２を流速：４m/s 、流量： 1.7×10^-3 m³/s で流
した。また、固定壁４は、ヒーター5 によって1200℃に
予熱して用いた。The outer diameter of the cylindrical body 1'is 400 mm.
The width was 135 mm and the thickness was 15 mm, and during operation, the cooling water 2 was flowed through the groove 21 at a flow rate of 4 m / s and a flow rate of 1.7 × 10 ⁻³ m ³ / s. The fixed wall 4 was preheated to 1200 ° C. by the heater 5 and used.

【００１９】ここに、耐火剤（パーマタイト）の物性値
を表１に示す。Table 1 shows the physical properties of the refractory agent (permatite).

【表１】 [Table 1]

【００２０】かくて、半凝固金属19の製造は、Arガス雰
囲気中で、温度：1380℃の上記鋳鉄の溶融金属17を取鍋
15から注入ノズル16を介して冷却攪拌室５に供給し、攪
拌用回転子１の回転数：300rpm、攪拌用回転子１と削剥
治具11との間隔：1.0mm とし、さらに攪拌用回転子１と
せき板９との間隔を10〜２mmの範囲で変化せて排出速度
を制御し（せん断ひずみ速度：600/s)、排出口13から半
凝固金属19（固相率：0.5)を連続して排出させた。Thus, the semi-solid metal 19 is produced by lapping the molten metal 17 of the above cast iron at a temperature of 1380 ° C. in an Ar gas atmosphere.
It is supplied from 15 to the cooling and stirring chamber 5 through the injection nozzle 16, the rotation speed of the stirring rotor 1 is 300 rpm, the distance between the stirring rotor 1 and the scraping jig 11 is 1.0 mm, and the stirring rotor is further added. The discharge speed is controlled by changing the interval between 1 and the weir plate 9 within the range of 10 to 2 mm (shear strain rate: 600 / s), and the semi-solid metal 19 (solid phase ratio: 0.5) is continuously supplied from the discharge port 13. And then discharged.

【００２１】そして、攪拌用回転１の円筒胴１′の中央
部と端部の温度、表面の亀裂の発生状況と寿命及び半凝
固金属の製造コストなどを調査した。Then, the temperature of the central portion and the end portion of the cylindrical body 1'of the agitating rotor 1, the state of occurrence of surface cracks and life, the manufacturing cost of semi-solidified metal, etc. were investigated.

【００２２】これらの調査結果を以下に述べる。図４は
操業中の攪拌用回転子１の円筒胴１′中央部と端部の内
部温度を示すグラフである。なお、円筒胴１′の内部温
度は、その表面から１mmの位置でＫシース熱電対を用い
て測定した。The results of these investigations will be described below. FIG. 4 is a graph showing the internal temperature of the central portion and the end portion of the cylindrical body 1'of the stirring rotor 1 during operation. The internal temperature of the cylindrical body 1'was measured at a position 1 mm from the surface thereof using a K sheath thermocouple.

【００２３】この図４から明らかなように、従来例の場
合は、中央部と端部とでは温度差がおよそ400 ℃もあり
端部の温度は1000℃にも達しているのに対し、適合例の
場合は、中央部と端部との温度差は小さく、端部の温度
はおよそ650 ℃と大幅に低減できている。As is apparent from FIG. 4, in the case of the conventional example, the temperature difference between the central portion and the end portion is about 400 ° C. and the end temperature reaches 1000 ° C. In the case of the example, the temperature difference between the center and the end is small, and the temperature at the end can be greatly reduced to about 650 ° C.

【００２４】また、操業終了後、従来例の場合は攪拌用
回転子１の円筒胴周の端部に溶融金属17が溶着し、その
除去作業のため攪拌用回転子１の整備に多くの時間を費
やしたが、適合例の場合は円筒胴周端部は耐火物で覆わ
れているため溶融金属17の溶着はなく攪拌用回転子１の
整備時間を大幅に短縮できた。After the end of the operation, in the case of the conventional example, the molten metal 17 is welded to the end of the cylindrical body of the stirring rotor 1, and a lot of time is required for the maintenance of the stirring rotor 1 for the removal work. However, in the case of the conforming example, since the peripheral end of the cylindrical body is covered with the refractory, the molten metal 17 is not welded and the maintenance time of the stirring rotor 1 can be greatly shortened.

【００２５】つぎに、攪拌用回転子１の円筒胴の亀裂発
生状況、攪拌用回転子１の寿命及び半凝固金属の製造コ
スト指数について、従来例と適合例との比較を表２にま
とめて示す。Next, Table 2 shows a comparison between the conventional example and the conforming example with respect to the crack generation state of the cylindrical body of the stirring rotor 1, the life of the stirring rotor 1, and the manufacturing cost index of the semi-solidified metal. Show.

【表２】 なお、表２において、製造コスト指数は、従来例の場合
の半凝固金属の製造コストを1.0 として適合例の場合を
対比したものであ。[Table 2] In Table 2, the manufacturing cost index is compared with the case of the conforming example, where the manufacturing cost of the semi-solidified metal in the case of the conventional example is 1.0.

【００２６】表２から明らかなように、適合例の場合は
従来例の場合に比し、円筒胴の長さ方向の温度差が小さ
くなることにより、熱歪による亀裂の発生が大幅に減少
し、その結果攪拌用回転子１の寿命が著しく延長され、
半凝固金属の製造コストが大幅に低減している。As is apparent from Table 2, in the case of the conforming example, the temperature difference in the lengthwise direction of the cylindrical body is smaller than that in the case of the conventional example, so that the occurrence of cracks due to thermal strain is significantly reduced. As a result, the life of the stirring rotor 1 is significantly extended,
The manufacturing cost of semi-solid metal is reduced significantly.

【００２７】なお、上記の効果は、耐火物被覆の主成分
が、SiO₂, CaO 又はZrO₂の場合にも同様であった。The above effects were the same when the main component of the refractory coating was SiO ₂ , CaO or ZrO ₂ .

【００２８】[0028]

【発明の効果】この発明は、高固相率の連続排出が容易
な横軸円筒胴よりなり抜熱能を有する攪拌用回転子と、
該回転子の円筒胴周に面して下せばまりの凹曲面からな
る固定壁との間に溶融金属を連続的に供給して半凝固金
属を製造する装置において、攪拌用回転子の円筒胴端部
胴周面に耐火物を被覆するものであり、この発明によれ
ば、高固相率の半凝固金属を安価に連続して製造できる
ようになり、次工程への安定供給ができ、半凝固金属の
需要拡大に大きく貢献する。Industrial Applicability The present invention comprises a stirring rotor having a horizontal axis cylindrical cylinder capable of continuously discharging a high solid fraction and having heat removal capability,
In a device for producing a semi-solid metal by continuously supplying a molten metal between a fixed wall formed of a concave curved surface of a lower face facing the cylindrical body of the rotor, a cylinder of a stirring rotor According to the present invention, it is possible to continuously manufacture a semi-solidified metal having a high solid fraction at a low cost, and a stable supply to the next process can be achieved. , Will greatly contribute to the expansion of demand for semi-solidified metals.

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

【図１】横軸円筒胴よりなる攪拌用回転子を用いる連続
式半凝固金属製造装置の説明図である。FIG. 1 is an explanatory view of a continuous semi-solid metal manufacturing apparatus using a stirring rotor having a horizontal axis cylindrical cylinder.

【図２】従来例の攪拌用回転子の軸方向断面の説明図で
ある。FIG. 2 is an explanatory view of an axial cross section of a conventional stirring rotor.

【図３】円筒胴周端部に耐火物を被覆したこの発明に適
合する攪拌用回転子の軸方向断面の説明図である。FIG. 3 is an explanatory view of an axial cross section of a stirring rotor according to the present invention in which a peripheral end portion of a cylindrical body is coated with a refractory material.

【図４】操業中の攪拌用回転子の円筒胴中央部と端部の
内部温度を示すグラフである。FIG. 4 is a graph showing internal temperatures of a central portion and an end portion of a cylindrical body of a stirring rotor during operation.

【符号の説明】[Explanation of symbols]

１ 攪拌用回転子 １′ 攪拌用回転子円筒胴 １′ａ 耐火物被覆 ２ 冷却水 ３ 駆動装置（攪拌用回転子用） ４−１ 固定壁 ４−２ 塞壁 ５ 冷却・攪拌室 ６ ヒーター ７ ヒーターホルダー ８ 駆動装置（固定壁用） ９ せき板 10 駆動装置（せき板用） 11 削剥治具 12 駆動装置（削剥治具用） 13 排出口 14 固相率センサー 15 取鍋 16 注入ノズル 17 溶融金属 18 凝固殻 19 半凝固金属 20 軸 21 溝 1 Stirring rotor 1'Stirring rotor cylindrical body 1'a Refractory coating 2 Cooling water 3 Drive device (for stirring rotor) 4-1 Fixed wall 4-2 Closing wall 5 Cooling / stirring chamber 6 Heater 7 Heater holder 8 Drive device (for fixed wall) 9 Weir plate 10 Drive device (for weir plate) 11 Exfoliating jig 12 Drive device (for exfoliating jig) 13 Discharge port 14 Solid fraction sensor 15 Ladle 16 Pouring nozzle 17 Melting Metal 18 Solidified shell 19 Semi-solidified metal 20 Shaft 21 Groove

───────────────────────────────────────────────────── フロントページの続き (72)発明者 難波 明彦 千葉県千葉市中央区川崎町１番地 株式会 社レオテック内 (72)発明者 高橋 広芳 千葉県千葉市中央区川崎町１番地 株式会 社レオテック内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiko Namba 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Stock Company Rheotech (72) Inventor Hiroyoshi Takahashi 1 Kawasaki-cho, Chuo-ku, Chiba Stock Company In rheotech

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 横軸円筒胴よりなり抜熱能を有する攪拌
用回転子と、該回転子の円筒胴周に面して下せばまりの
凹曲面からなる固定壁との間に溶融金属を連続的に供給
し、凝固を生起させながら攪拌用回転子の回転に基づく
せん断力によって粒子の細かい非樹枝状晶が懸濁した半
凝固金属を製造して、攪拌用回転子と固定壁との間の下
方のすき間に連なる排出口から半凝固金属を連続的に排
出する半凝固金属の製造装置において、 攪拌用回転子円筒胴の端部胴周面に耐火物を被覆してな
る半凝固金属の製造装置。1. A molten metal is provided between a stirring rotor having a horizontal axis cylindrical cylinder and having a heat removal capability, and a fixed wall which is a concave curved surface of a lower surface facing the circumference of the cylindrical cylinder of the rotor. A semi-solidified metal in which fine non-dendritic grains of fine particles are suspended is produced by a shearing force based on the rotation of the stirring rotor while continuously feeding and causing solidification. In a semi-solid metal manufacturing device that continuously discharges semi-solid metal from a discharge port connected to a gap below, a semi-solid metal formed by coating a refractory material on an end cylinder peripheral surface of a stirring rotor cylindrical cylinder. Manufacturing equipment. 【請求項２】 耐火物の主成分が、Al₂O₃ である請求項
１に記載の半凝固金属の製造装置。2. The apparatus for producing a semi-solid metal according to claim 1, wherein the main component of the refractory material is Al ₂ O ₃ . 【請求項３】 耐火物の主成分が、SiO₂である請求項１
に記載の半凝固金属の製造装置。3. The main component of the refractory material is SiO _2.
An apparatus for producing a semi-solid metal according to. 【請求項４】 耐火物の主成分が、CaO である請求項１
に記載の半凝固金属の製造装置。4. The main component of the refractory material is CaO 2.
An apparatus for producing a semi-solid metal according to. 【請求項５】 耐火物の主成分が、ZrO₂である請求項１
に記載の半凝固金属の製造装置。5. The main component of the refractory material is ZrO _2.
An apparatus for producing a semi-solid metal according to.