JPS61111758A - Continuous casting method of high melting metal - Google Patents

Abstract

PURPOSE:To prevent troubles such as mold defect and the clogging of a molten metal in a nozzle part by using a casting mold consisting of a material having specific heat conductivity and sliding and moving the top end of a nozzle for casting the molten metal while maintaining the tight contact with the surface part of the casting mold. CONSTITUTION:The casting mold consisting of the material having <=0.1Cal/ cm.sec. deg.C heat conductivity at 800-1,000 deg.C is used. The top end of the nozzle 15 for casting the molten metal is so constituted as to slide by maintaining the tight contact with the surface of the casting mold to suppress the heat dissipation at the top end of the nozzle as far as possible. The molten metal 14 is smoothly cast into casting hole parts 11, 12, 13 of the casting mold when the top end of the nozzle 15 moves to arrive at said hole parts. The continuous casting mold is thus obtd. without providing a valve, plug, etc. to the nozzle part 15 and the troubles such as the clogging of the molten metal and contamination are averted.

Description

【発明の詳細な説明】 本発明は高融点金属類の鋳型方法、特にその連続注型方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molding method for high melting point metals, particularly to a continuous casting method thereof.

金属製皮接治療片は径が５ＩＩＩＩＩ〜１０ｍ、厚さ２
ｍｌ〜５ｗ程度の円板法金属粒であるが、これらの治療
片の量産化の場合には粉末冶金的方法で焼結するか、又
は金属粉末を金属治療片の形状に合せた多数ケの雌型孔
を設けた黒鉛製型に金網粉末を充填した後、炉中で型全
体を昇温溶融させて成形するか、又は通常の鋳造法によ
って成形している。The metal skin treatment piece has a diameter of 5III to 10 m and a thickness of 2
The disk method metal particles are about ml to 5W, but in the case of mass production of these treatment pieces, they must be sintered using a powder metallurgy method, or they can be sintered using a powder metallurgy method, or the metal powder can be sintered in multiple pieces according to the shape of the metal treatment piece. After filling a graphite mold with female holes with wire mesh powder, the entire mold is heated and melted in a furnace, or molded by a normal casting method.

然し、前者の金属粉末からの溶融成形法では金属粉末の
調製及び成形型への充填等で多くの工数を要する上に加
熱融解成形のために要する熱エネルギーは大きく熱管理
的にみて、その効率が悪いという大きな欠点がある。However, the former method of melt forming from metal powder requires a large number of man-hours for preparing the metal powder and filling it into the mold, and the thermal energy required for heating and melt forming is large, making the efficiency difficult to manage. There is a big drawback that it is bad.

これに対して後者の鋳型法は前記の欠点を補うものであ
るが対象金属の融点が高いため型による溶湯の急冷凝固
のためモールド不良を生じ易く、又ノズル部の熱放散の
ためノズルから溶湯がスムーズに滴下供給されず、時に
はノズル部が溶湯の凝固物で目すまりを起すトラブルも
生じ、量産化のための連続操作が行われ難いので、現状
では専ら前者の金属粉末融解成形法が用いられている。On the other hand, the latter molding method compensates for the above-mentioned drawbacks, but due to the high melting point of the target metal, mold defects are likely to occur due to the rapid solidification of the molten metal by the mold, and the molten metal is removed from the nozzle due to heat dissipation at the nozzle. The metal powder is not dripped smoothly and sometimes the nozzle is clogged with solidified molten metal, making it difficult to perform continuous operations for mass production. It is used.

本発明は高融点金属の連続鋳型法について種々検討の結
果、溶湯ノズル部、鋳型部での熱放散が鋳型トラブルの
要因であることをつきとめて本発明を完成した。As a result of various studies on continuous molding methods for high-melting point metals, the present invention was completed after finding that heat dissipation in the molten metal nozzle and mold section was the cause of mold troubles.

本発明は鋳型法の前記の欠点を解決して金属皮接治療片
の量産化のための連続鋳型方法を確立することを目的と
するもので、本発明は鋳型に熱放散性の小さい即熱伝導
率が８００８〜１０００℃において０．１０ａ１／　ｃ
ｍ　、　ｓｅｅ　、　’Ｃ以下の材質力らなる鋳型を用
いて、溶湯鋳入ノズル先端部が鋳型表面部に密着しなが
らスライド移動するよう構成したもので、これによりノ
ズル部、鋳型での熱放散が押えられて前記のようなモー
ルド不良、ノズル部での溶湯の目づまり等のトラブルが
解決できて連続鋳型法により高融点金属の皮接金属治療
片及びその他の成形品の量産化を可能にするものである
。The purpose of the present invention is to solve the above-mentioned drawbacks of the mold method and establish a continuous mold method for mass production of metal skin bonded pieces. Conductivity is 0.10a1/c at 8008-1000℃
Using a mold made of a material with a material strength of m, see, 'C or less, the molten metal casting nozzle tip is configured to slide while being in close contact with the mold surface, thereby improving heat dissipation in the nozzle and the mold. This solves problems such as mold defects and clogging of the molten metal in the nozzle, making it possible to mass-produce high-melting point metal skin treatment pieces and other molded products using the continuous molding method. It is something to do.

本発明でいう高融点金属とは融点が約９００℃以−ヒの
ものでゲルマニウム、銀、銅、鉄等の単体又はその合金
等が含まれる。The high melting point metal in the present invention has a melting point of about 900 DEG C. or higher, and includes elements such as germanium, silver, copper, and iron, as well as alloys thereof.

鋳型材質の熱伝導率８００℃〜１０００℃に於て、（１
，ｌ　Ｃａｌ　／　ｃｍ　、　ｓｅｅ　、　℃以下の限
界は、これ以上の熱伝導率でけ熱放散が大き過ぎて鋳型
品はモールド不良となり、又溶湯の滴下供給がスムーズ
に行われず、連続鋳型は不可能と々る限度を示すもので
ある。これに適合する材質の例は黒鉛、窒化硼素、ステ
アタイト等の各柚セラミツ、　り材を挙げることができ
る。The thermal conductivity of the mold material at 800°C to 1000°C is (1
, l Cal / cm , see , The limit below ℃ means that if the thermal conductivity is higher than this, the heat dissipation will be too large and the molded product will have a mold failure, and the dripping supply of molten metal will not be carried out smoothly, and continuous molding will fail. It shows the limits of what is possible. Examples of materials that are compatible with this include graphite, boron nitride, steatite, and other yuzu ceramics.

又溶湯鋳入ノズル先端部は、第１図に示すように鋳型表
面に密着しながら摺動するように構成してノズル先端部
での熱放散を極力押えるようにして、ノズル先端部が鋳
型の鋳込孔部に移動到達した時に溶湯が該鋳込孔部にス
ムーズに鋳入されるように構成する。これによりノズル
部にバルブ、栓等を特に設けることなＥ、で連続鋳型が
可能となり、パルプ、栓等による溶湯の目づまり、汚染
等のトラブルを避けることができる。As shown in Figure 1, the tip of the molten metal pouring nozzle is structured so that it slides in close contact with the mold surface to suppress heat dissipation at the nozzle tip as much as possible. The structure is such that the molten metal is smoothly cast into the casting hole when it moves and reaches the casting hole. This makes it possible to perform continuous molding without particularly providing a valve, plug, etc. in the nozzle part, and it is possible to avoid troubles such as clogging and contamination of the molten metal due to pulp, plugs, etc.

実施例−１ 黒鉛を用いて第４図に示すようにモールド孔４８ケを配
置した円板状の鋳型を作製１−溶湯ボットの下部に設け
た鋳型ノズル部が第４図ＡＡ’線上に密着摺動するよう
に設定し以下に示す運転条件で７φｘ２，５％のゲルマ
ニウム皮接治療片の連続鋳型を行った。Example-1 Fabrication of a disk-shaped mold with 48 mold holes arranged as shown in Fig. 4 using graphite 1 - The mold nozzle part provided at the bottom of the molten metal bot is tightly attached to the line AA' in Fig. 4 Continuous molding of 7φ x 2, 5% germanium skin treatment pieces was performed under the operating conditions shown below with the device set to slide.

溶湯炉温度設定：９６０°〜１０００℃鋳型ターンテー
ブル回転数：　１２ｒ、　ｐ。Molten metal furnace temperature setting: 960° to 1000°C Mold turntable rotation speed: 12r, p.

（１時間当り　１２回転） この結果、稼動１時間当り５７６ケの成形品を得た。成
形品の成形不良品は１０ケで、その不良率け２チ未満で
、又稼動中ノズル部での溶湯塞りトラブルは皆無であっ
た。(12 revolutions per hour) As a result, 576 molded products were obtained per hour of operation. There were 10 defective molded products, and the defect rate was less than 2, and there were no problems with molten metal clogging in the nozzle during operation.

同、成形品の離型は真空ビンセット方式でスムーズに行
うことができた。Similarly, the molded product could be released smoothly using the vacuum bottle set method.

実施例−２ 鋳型に窒化硼素材を用いた他は実施例−１と同一に鋳型
を設定して、以下に示す運転条件で鋏片の連続鋳造を行
った。Example 2 A mold was set up in the same manner as in Example 1 except that a boron nitride material was used for the mold, and scissors pieces were continuously cast under the operating conditions shown below.

溶湯炉温度設定＝９８０°〜１０３０℃鋳型ターンテー
ブルの回転数：　１０　ｒ、　ｐ。Molten metal furnace temperature setting = 980° to 1030°C Mold turntable rotation speed: 10 r, p.

（１時間当り　１０回転） この結果、１時間当り４８０ケの鋳型品を得た。(10 rotations per hour) As a result, 480 molded products were obtained per hour.

このうち成形不良品は加ケで、その不良率は約４俤で且
稼動中ノズル部での溶湯塞り事故は皆無であった。Of these, only one molded product was defective, and the defective rate was approximately 4 times, and there was no accident of molten metal clogging in the nozzle during operation.

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

第１図は本発明鋳型方法の要点を示す説明図第２図は本
発明方法装置の平面図 第３図は第２図のＡ−ム′線断面図 第４図は鋳型板の平面図を示す。 １・・・溶湯坩堝加熱炉 ２・・・溶湯坩堝 ３・・・鋳型板 ４・・・鋳型板保持駆動ターンテーブル５・・・鋳型装
置フレーム ６・・・鋳型板回転方向 ７・・・ターンテーブル回転駆動軸 ８・・・鋳型板取付固定用ナツト ９・・・溶湯坩堝、加熱炉支持固定具 １０・・・鋳型孔（溶湯未鋳入） １１・・・鋳型孔（溶湯鋳入済） １２・・・鋳型孔（溶湯鋳入時） １３・・・鋳型板移動方向 ・　１４・・・溶湯 １５・・・鋳入ノズル １６・・・鋳入ノズル／鋳型板摺動部 第１図 第２図 第３図 第４図Fig. 1 is an explanatory diagram showing the main points of the molding method of the present invention. Fig. 2 is a plan view of the method and apparatus of the present invention. Fig. 3 is a sectional view taken along the line A--M' in Fig. 2. show. 1... Molten metal crucible heating furnace 2... Molten metal crucible 3... Mold plate 4... Mold plate holding drive turntable 5... Mold device frame 6... Mold plate rotation direction 7... Turn Table rotation drive shaft 8... Mold plate mounting fixing nut 9... Molten metal crucible, heating furnace support fixture 10... Mold hole (molten metal not yet cast) 11... Mold hole (molten metal already cast) 12... Mold hole (when pouring molten metal) 13... Mold plate movement direction 14... Molten metal 15... Casting nozzle 16... Casting nozzle/mold plate sliding part Fig. 1 Figure 2 Figure 3 Figure 4

Claims (1)

【特許請求の範囲】[Claims] ８００〜１０００℃における熱伝導率が０．１Ｃａｌ／
ｃｍ・ｓｅｃ・℃以下の材質からなる鋳型を用いて、溶
湯鋳入ノズル先端部が鋳型表面部に密着しながらスライ
ド移動するようにすることを特徴とする高融点金属の連
続鋳型方法Thermal conductivity at 800-1000℃ is 0.1 Cal/
A continuous casting method for high-melting point metals, using a mold made of a material with a temperature of cm/sec/°C or less, the tip of a molten metal casting nozzle slidingly moving while being in close contact with the surface of the mold.