JPH08281405A - Casting apparatus - Google Patents
Casting apparatusInfo
- Publication number
- JPH08281405A JPH08281405A JP8503295A JP8503295A JPH08281405A JP H08281405 A JPH08281405 A JP H08281405A JP 8503295 A JP8503295 A JP 8503295A JP 8503295 A JP8503295 A JP 8503295A JP H08281405 A JPH08281405 A JP H08281405A
- Authority
- JP
- Japan
- Prior art keywords
- casting
- upper electrode
- shaft
- crucible
- casting chamber
- 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.)
- Withdrawn
Links
Landscapes
- Dental Prosthetics (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Furnace Details (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば歯科用補綴物等
の精密品の鋳造に用いる鋳造装置に関するものであり、
更に詳しくは坩堝の底部に埋設された下部電極とその上
方に配置された上部電極との間にアーク誘導用高周波を
発振して両電極間にアークを発生せしめ、坩堝内に収容
した金属をアーク熱により溶融して鋳型に鋳込むように
した鋳造装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting device used for casting precision products such as dental prostheses.
More specifically, a high frequency for arc induction is oscillated between the lower electrode embedded in the bottom of the crucible and the upper electrode disposed above it to generate an arc between the two electrodes, and the metal contained in the crucible is arced. The present invention relates to a casting device that is melted by heat and cast into a mold.
【０００２】[0002]
【従来の技術】上記のようなアーク熱により金属を溶融
する鋳造装置においては、アーク熱が極めて高温のた
め、電極を位置固定した状態でアーク放電した場合、坩
堝内の金属が局部的に加熱され、金属蒸気の発生や金属
の変性を生じたり、又、溶融金属と非溶融金属とが混在
して溶融終点の判断が困難であったり、更には、溶融金
属の流動性が部分的に異なるために鋳造品が不均質なも
のとなる等のおそれがある。このため、被溶融金属の局
部的な加熱を防止して均一且つ効率よく溶融するため
に、金属溶融時に上部電極を位置移動可能に設けたもの
がある。例えば実公昭６１−６９９０号に開示されたも
のは、鋳造室内に配設されたルツボ内部に望ませて設け
たタングステン電極等の上部電極の胴部適所を回転自在
に軸支するとともに、下端に前記電極頭部に係合する操
作部を有し中間部を鋳造装置の器壁に回転自在に軸支し
て上下に昇降可能に取り付けたティルティング装置であ
り、鋳造装置の外部へ突出した杆体を操作することで電
極の位置を移動させながら金属を溶融させて局部的な加
熱を防止するものである。2. Description of the Related Art In a casting apparatus for melting metal by arc heat as described above, the arc heat is extremely high. Therefore, when arc discharge occurs with the electrodes fixed in position, the metal in the crucible is locally heated. The generation of metal vapor or modification of the metal occurs, and it is difficult to determine the melting end point due to the mixture of molten metal and non-molten metal. Furthermore, the fluidity of the molten metal is partially different. Therefore, there is a possibility that the cast product may become non-uniform. Therefore, in order to prevent local heating of the metal to be melted and to melt it uniformly and efficiently, there is one in which the upper electrode is provided so as to be movable in position when the metal is melted. For example, the one disclosed in Japanese Utility Model Publication No. 61-6990 rotatably supports a proper place of a body of an upper electrode such as a tungsten electrode, which is desirably provided in a crucible arranged in a casting chamber, and at the lower end thereof. A tilting device that has an operating part that engages with the electrode head and has an intermediate part that is rotatably supported by a wall of a casting device and is vertically movable up and down, and a rod projecting to the outside of the casting device. Is operated to melt the metal while moving the position of the electrode to prevent local heating.
【０００３】しかし、上記のような従来のティルテング
装置は、電極を操作するための杆体が鋳造室の器壁を貫
通して外部へ突出した構造であるため、器壁に貫通孔が
形成されている。ところが、この種の鋳造装置では、ア
ーク熱による金属溶融時の電極の酸化による劣化防止、
あるいは溶融金属、例えばチタン等の極めて酸化されや
すい金属の溶融時の酸化を防止するために、鋳造装置内
を真空状態にして溶融操作を行うことがあり、鋳造室は
高度に気密を維持できる構造であることが望まれる。し
かし、前記のように鋳造室の器壁を貫通してティルティ
ング装置を設ける場合には、ティルティング装置部分を
高度な気密構造とする必要があり、装置構造が複雑とな
る。However, in the conventional tilting apparatus as described above, the rod for operating the electrode has a structure in which the rod penetrates the vessel wall of the casting chamber and protrudes to the outside, so that a through hole is formed in the vessel wall. There is. However, in this type of casting apparatus, deterioration prevention due to oxidation of the electrode during metal melting due to arc heat,
Alternatively, in order to prevent oxidation of molten metal such as titanium, which is extremely easily oxidized, during melting, the melting process may be performed by placing the inside of the casting equipment in a vacuum state, and the casting chamber may be highly airtight. Is desired. However, in the case where the tilting device is provided by penetrating the vessel wall of the casting chamber as described above, the tilting device portion needs to have a highly airtight structure, which complicates the device structure.
【０００４】[0004]
【発明が解決しようとする課題】そこで、本発明では、
簡単な構造で、且つ鋳造室の気密性を高度に維持しつ
つ、金属溶融時の上部電極の位置移動を可能とした鋳造
装置を提供せんとするものである。Therefore, according to the present invention,
An object of the present invention is to provide a casting apparatus having a simple structure and capable of moving the position of the upper electrode when the metal is melted while maintaining a high airtightness of the casting chamber.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明の請求項１に係る鋳造装置は、鋳造室内に
配設される坩堝内の下部電極とその上方に配設される上
部電極との間にアーク放電させてアーク熱により坩堝内
の金属を溶融させるようにした鋳造装置において、前記
上部電極を位置移動可能に取り付けるとともに、該上部
電極と鋳造室外に配設した操作部とを磁石により連動さ
せるように構成して、鋳造室外から操作部により上部電
極を遠隔操作して位置移動可能としたことを特徴とす
る。In order to achieve the above object, a casting apparatus according to claim 1 of the present invention is provided with a lower electrode in a crucible provided in a casting chamber and above the lower electrode. In a casting apparatus in which a metal in a crucible is melted by arc discharge between the upper electrode and an arc heat, the upper electrode is attached so as to be positionally movable, and the upper electrode and an operating portion arranged outside the casting chamber. Is configured to be interlocked with a magnet, and the upper electrode can be remotely operated from the outside of the casting chamber by an operating portion to move the position.
【０００６】請求項２に係る鋳造装置は、上部電極の中
間適所が軸方向に摺動可能且つ軸の廻りで回転可能な支
持軸に取り付けられており、該支持軸から前方へ突設し
た作動軸を鋳造室の内蓋を挟んで磁石により操作部に連
動するようにした。In the casting apparatus according to the second aspect, the middle portion of the upper electrode is attached to a support shaft which is slidable in the axial direction and rotatable around the shaft, and the operation is provided so as to project forward from the support shaft. The shaft is interlocked with the operating part by a magnet with the inner lid of the casting chamber sandwiched.
【０００７】請求項３に係る鋳造装置では、上部電極を
不活性ガス噴射ノズルに内装してなる。In the casting apparatus according to the third aspect, the upper electrode is provided inside the inert gas injection nozzle.
【０００８】更に、請求項４の鋳造装置では、上記のよ
うな鋳造装置における鋳込みの方式を遠心鋳造式とし
た。Further, in the casting apparatus of claim 4, the casting method in the above casting apparatus is a centrifugal casting method.
【０００９】[0009]
【作用】本発明に係る鋳造装置では、坩堝内の下部電極
とその上方の上部電極との間にアーク放電させてアーク
熱により坩堝内の金属を溶融させるに際し、鋳造室外の
操作部を操作すると、鋳造室内の上部電極が磁石によっ
て操作部に連動して位置移動しながら坩堝内の金属を均
一に加熱、溶融する。溶融された金属は、遠心力、ある
いは加圧により坩堝内から鋳型の鋳造室内へ鋳込まれ
る。In the casting apparatus according to the present invention, when an arc discharge is generated between the lower electrode in the crucible and the upper electrode above the crucible to melt the metal in the crucible by the arc heat, the operation part outside the casting chamber is operated. The metal in the crucible is uniformly heated and melted while the upper electrode in the casting chamber is moved in position by a magnet in conjunction with the operating portion. The molten metal is cast from the crucible into the casting chamber of the mold by centrifugal force or pressure.
【００１０】[0010]
【実施例】以下、添付図面に示した実施例をもとに、本
発明に係る鋳造装置を更に詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The casting apparatus according to the present invention will be described in more detail below with reference to the embodiments shown in the accompanying drawings.
【００１１】図１は本発明に係る鋳造装置の１実施例を
示すものである。図中符号１が装置本体で、２は開閉扉
である。開閉扉２の前面は操作パネル３となっており、
スイッチ類や覗き窓４等が設けられている。装置本体１
の内部には、図２〜図４に示すような、前面に開口した
偏平な円筒形状の鋳造室５が内蔵されており、この鋳造
室５の前面開口部を開閉扉２裏面の内蓋７が閉止するよ
うになっている。この開閉扉２は図１中左上に位置する
支持部６に内装した、図示しない回動軸により回動可能
に軸支されており、且つ回動軸に外装したバネ等により
開閉扉２が装置本体１方向に常時付勢されていて、開閉
扉２を閉じた状態では図３に示すように内蓋７周囲に形
成された段部71のパッキン８が鋳造室５の開口縁に強制
的に押接され、内蓋裏面72が鋳造室５の開口内縁にわず
かに内装された状態で開口部を気密に閉止するととも
に、開閉扉２を開ける場合には油圧シリンダー或いはソ
レノイド等の押出手段によりバネ等の付勢力に抗して前
記支持部６内の回動軸を前方へ押し出すことで内蓋裏面
72を鋳造室５の開口縁から離間させて開閉扉２を開動可
能とする。FIG. 1 shows an embodiment of a casting apparatus according to the present invention. In the figure, reference numeral 1 is a main body of the apparatus, and 2 is an opening / closing door. The front of the door 2 is the operation panel 3,
Switches and a viewing window 4 are provided. Device body 1
As shown in FIGS. 2 to 4, a flat cylindrical casting chamber 5 having an opening on the front side is built in the inside of the casting chamber. Is supposed to close. The opening / closing door 2 is rotatably supported by a rotation shaft (not shown) mounted on a support portion 6 located at the upper left of FIG. As shown in FIG. 3, the packing 8 of the stepped portion 71 formed around the inner lid 7 is forcibly forced to the opening edge of the casting chamber 5 when the opening / closing door 2 is closed while being constantly urged toward the main body 1. The opening is hermetically closed with the inner lid backside 72 being slightly pressed into the opening inner edge of the casting chamber 5 and the opening / closing door 2 is opened by a pushing means such as a hydraulic cylinder or a solenoid when the opening / closing door 2 is opened. Back of the inner lid by pushing the rotating shaft in the supporting portion 6 forward against the urging force of the inner cover.
The opening / closing door 2 can be opened by separating 72 from the opening edge of the casting chamber 5.
【００１２】前記鋳造室５内には、図２に示すような遠
心鋳造機構10が設けられている。この遠心鋳造機構10
は、図示しない駆動手段に連結された水平な回転軸11に
固定された基台12から一側側に突設した螺軸13にバラン
スウエイト14を軸方向に位置移動可能に取り付けるとと
もに、基台12の他側側には、坩堝装着部15及び鋳型装着
部16が設けられている。更に、前記坩堝装着部15の上方
には、アルゴンガス等の不活性ガス噴射ノズル18にタン
グステン電極等の上部電極17を内装したトーチ19が配設
されている。このトーチ19は、その中間適所が基台12に
固定されたトーチ取付部21両側の取付片21ａ、21ａに中
間の適所が軸方向に摺動自在且つ軸廻りに回動自在に挿
通された支持軸20の一端に取り付けられており、該支持
軸20の軸方向の移動により左右へ移動し、又、支持軸20
の回動により前後に揺動可能に取り付けられている。そ
して、前記支持軸20の他端には前記上部電極17に通電す
るジャバラ銅より線22とガス導入ホース23が連結されて
いて、いずれも支持軸20内を通ってそれぞれ上部電極17
とガス噴射ノズル18へ連結されている。又、前記トーチ
取付部21は、基台12に対してその一側の回動軸24により
回動可能に取り付けられるとともに、ストッパー25によ
り固定されており、ストッパー25を解除することで回動
軸24を中心としてトーチ19を水平軸20及びトーチ取付部
21とともに上方へはね上げて坩堝装着部15への坩堝の装
着を可能としてなる。A centrifugal casting mechanism 10 as shown in FIG. 2 is provided in the casting chamber 5. This centrifugal casting mechanism 10
The balance weight 14 is attached to a screw shaft 13 projecting to one side from a base 12 fixed to a horizontal rotary shaft 11 connected to a driving means (not shown) so that the balance weight 14 can be moved in the axial direction, and On the other side of 12, a crucible mounting portion 15 and a mold mounting portion 16 are provided. Further, a torch 19 in which an upper electrode 17 such as a tungsten electrode is installed in an inert gas injection nozzle 18 such as argon gas is arranged above the crucible mounting portion 15. The torch 19 is supported by mounting pieces 21a, 21a on both sides of the torch mounting portion 21 fixed at the middle proper position to the base 12 so that the middle proper position is axially slidable and rotatable about the axis. It is attached to one end of the shaft 20 and moves left and right by the movement of the support shaft 20 in the axial direction.
It is attached so as to be swingable back and forth by the rotation of. A bellows copper stranded wire 22 for energizing the upper electrode 17 and a gas introduction hose 23 are connected to the other end of the support shaft 20.
Is connected to the gas injection nozzle 18. Further, the torch attachment portion 21 is rotatably attached to the base 12 by a rotation shaft 24 on one side thereof, and is fixed by a stopper 25. By releasing the stopper 25, the rotation shaft is rotated. Horizontal torch 19 centered around 24 and torch mount
It is possible to mount the crucible on the crucible mounting part 15 by flipping it upward together with 21.
【００１３】そして、図３〜図５に示すように、前記ト
ーチ取付部21における両取付片21ａ、21ａ間に位置する
支持軸20部分には、前方へ作動軸26が突設され、該作動
軸26の先端頭部に第１の磁石27が埋設されている。一
方、開閉扉２内には、トーチの操作部として、先端頭部
に裏面の内蓋７を介して前記第１の磁石27と互いに吸引
する第２の磁石28を埋設した誘導軸29が配設されてお
り、該誘導軸29の他端は開閉扉２前面の操作パネル３に
形成された開孔30を貫通し、操作パネル３前面側の端部
に操作ツマミ31が固定されている。又、誘導軸29にはベ
ーク板等のスライド板32が固着されており、操作パネル
３内面の開孔30周囲を被覆するように設けられた同じく
ベーク板等の補強板33に対して摺動自在に圧接された状
態で、スライド板32と操作ツマミ31との間で操作パネル
３とその裏面の補強板33とを挾持した状態で取り付けら
れている。更に、内蓋７の内面側には、位置規制用のバ
ネ34が誘導軸29の頭部を取り巻くようにその周囲に設け
られている。このバネ34は、トーチ19が坩堝装着部15に
装着された坩堝ａの中心に位置するときに支持軸20に突
設した作動軸26の先端と誘導軸29が、互いに向き合うよ
うに誘導軸29を位置規制している。尚、前記第１の磁石
27、及び第２の磁石28は、永久磁石であるが、その種類
としては焼結磁石やボンド磁石等が適宜採用される。Then, as shown in FIGS. 3 to 5, an operating shaft 26 is projected forward from a portion of the support shaft 20 located between the two mounting pieces 21a of the torch mounting portion 21, and the operating shaft 26 is projected. A first magnet 27 is embedded in the head portion of the tip of the shaft 26. On the other hand, in the opening / closing door 2, an induction shaft 29 having a second magnet 28 that is attracted to the first magnet 27 and the second magnet 28 that is attracted to each other via the inner lid 7 on the back surface is arranged as an operating portion of the torch. The other end of the guide shaft 29 penetrates an opening 30 formed in the operation panel 3 on the front surface of the opening / closing door 2, and an operation knob 31 is fixed to an end portion on the front surface side of the operation panel 3. A slide plate 32 such as a bake plate is fixed to the guide shaft 29 and slides against a reinforcing plate 33 such as a bake plate that is provided so as to cover the periphery of the opening 30 on the inner surface of the operation panel 3. The operation panel 3 and the reinforcing plate 33 on the back surface of the operation panel 3 are attached between the slide plate 32 and the operation knob 31 in a freely pressed state. Further, on the inner surface side of the inner lid 7, a spring 34 for position regulation is provided around the head of the guide shaft 29 so as to surround the head. The spring 34 includes a guide shaft 29 such that the tip end of the operating shaft 26 projecting from the support shaft 20 and the guide shaft 29 face each other when the torch 19 is located at the center of the crucible a mounted on the crucible mounting portion 15. The position is regulated. Incidentally, the first magnet
Although the 27 and the second magnet 28 are permanent magnets, a sintered magnet, a bonded magnet or the like is appropriately adopted as the type.
【００１４】次に上記のような本発明に係る鋳造装置に
よる鋳造操作を説明する。先ず、準備操作として、開閉
扉２を開けて装置本体１内の鋳造室５の前面開口部を開
放し、ストッパー25を解除してトーチ19をトーチ取付部
21とともに上方へはね上げ、被溶融金属Ｍを入れた坩堝
ａを坩堝装着部15へ装着したうえでトーチ19を再び水平
状態に復帰させて下部電極17を坩堝ａ内に望ませた状態
にセットし、ストッパー25によりトーチ取付部21を基台
12に固定するとともに、鋳型装着部16へ鋳型ｂを装着
し、開閉扉２を閉じて鋳造室５内を気密に閉止する。次
に、鋳造操作は、鋳造室５内を必要に応じて適宜真空引
きしたうえで、上部電極17と坩堝ａの底部に埋設された
下部電極35との間にアーク誘導用高周波を発振して両電
極17、35間にアークを発生せしめ、坩堝ａ内に収容した
金属Ｍをアーク熱により溶融する。この金属溶融時に
は、操作パネル３に設けられた覗き窓４から鋳造室５内
部における金属の溶融状況を確認しつつ、操作ツマミ31
を操作して該操作ツマミ31に取り付けた誘導軸29を上下
左右に移動させることで該誘導軸29に埋設した第２の磁
石28が、鋳造室５内の支持軸20に突設した作動軸26先端
の第１の磁石27を吸引誘導して支持軸20を軸廻りに回転
させ、或いは左右に摺動させてトーチ19を前後に揺動さ
せ、又は左右に移動させることで上部電極17の位置を前
後左右に適宜移動させて金属Ｍの局部的な加熱を防止し
て全体に均一に溶融させる。そして、金属Ｍが完全に溶
融した時点でアーク放電を停止し、回転軸11をバネ、又
は、モータ、あるいは両者を組み合わせた駆動源により
高速度で回転させて坩堝ａ内の溶融金属を鋳型ｂ内の鋳
込室内に鋳込むことで鋳造操作を完了する。Next, the casting operation by the casting apparatus according to the present invention as described above will be explained. First, as a preparatory operation, the opening / closing door 2 is opened to open the front opening of the casting chamber 5 in the apparatus main body 1, the stopper 25 is released, and the torch 19 is attached to the torch mounting portion.
It is flipped upward together with 21, and the crucible a containing the metal M to be melted is mounted on the crucible mounting portion 15, and then the torch 19 is returned to the horizontal state again and the lower electrode 17 is set in the desired state in the crucible a. , Torch mounting part 21 base with stopper 25
The mold b is fixed to the mold 12, and the mold b is mounted on the mold mounting portion 16, and the opening / closing door 2 is closed to hermetically close the casting chamber 5. Next, in the casting operation, after the inside of the casting chamber 5 is appropriately evacuated, a high frequency for arc induction is oscillated between the upper electrode 17 and the lower electrode 35 embedded in the bottom of the crucible a. An arc is generated between the two electrodes 17 and 35, and the metal M contained in the crucible a is melted by the arc heat. At the time of melting of the metal, the operation knob 31 is checked while confirming the melting state of the metal in the casting chamber 5 through the viewing window 4 provided on the operation panel 3.
Is operated to move the induction shaft 29 attached to the operation knob 31 vertically and horizontally, so that the second magnet 28 embedded in the induction shaft 29 causes the second magnet 28 to project from the support shaft 20 in the casting chamber 5 26 The first magnet 27 at the tip is attracted and guided to rotate the support shaft 20 around the shaft, or slide left and right to swing the torch 19 back and forth, or move left and right to move the upper electrode 17 The position is appropriately moved back and forth and left and right to prevent the metal M from being locally heated and to be uniformly melted throughout. Then, when the metal M is completely melted, the arc discharge is stopped, and the rotating shaft 11 is rotated at a high speed by a spring, a motor, or a drive source which is a combination of both, and the molten metal in the crucible a is cast into a mold b. The casting operation is completed by casting into the casting chamber inside.
【００１５】上記のような本発明に係る鋳造装置によれ
ば、開閉扉２前面の操作ツマミ31を操作することで鋳造
室５内のトーチ19を磁石による遠隔操作で前後に揺動さ
せ、又は左右に移動させて上部電極17を前後左右に適宜
移動させながら金属Ｍを溶融させることができるので、
アーク熱による金属の局部的な加熱を防止でき、金属蒸
気の発生や金属の変質を防止して均一に且つ効率よく溶
融させることができ、溶融終点の判断も容易であるとと
もに、均一で良質な鋳造品を得ることができる。しか
も、従来のティルティング装置のように鋳造室５の室壁
に孔を開ける必要もなく、開閉扉２裏面の内蓋７を挟ん
で対向配置した２つの磁石27、28によりトーチ19を支持
する支持軸20と操作ツマミ31とを連動させて上部電極17
を鋳造室５の外から遠隔操作可能としてなるので、鋳造
室５を簡単な構造で高度の気密状態に維持することが可
能である。又、操作ツマミ31に取り付けた誘導軸29をバ
ネ34により付勢してトーチ19が常に坩堝ａの中心にくる
ようにしてなるから、操作ツマミ31による上部電極17の
遠隔操作が容易となり、又、溶融終了後にはトーチ19を
速やかに元の位置に復帰させて、次回の鋳造操作に備え
ることができる。According to the casting apparatus of the present invention as described above, the torch 19 in the casting chamber 5 is swung back and forth by a remote operation by a magnet by operating the operation knob 31 on the front surface of the opening / closing door 2. Since the metal M can be melted by moving the upper electrode 17 back and forth and left and right as appropriate by moving it left and right.
It is possible to prevent local heating of the metal due to arc heat, prevent the generation of metal vapor and the deterioration of the metal, and make it possible to melt uniformly and efficiently, and it is easy to determine the melting end point, and it is uniform and of good quality. A cast product can be obtained. Moreover, unlike the conventional tilting device, it is not necessary to make a hole in the chamber wall of the casting chamber 5, and the torch 19 is supported by the two magnets 27 and 28 that are arranged opposite to each other with the inner lid 7 on the back surface of the opening / closing door 2 interposed therebetween. The support shaft 20 and the operation knob 31 are interlocked, and the upper electrode 17
Since it can be remotely operated from outside the casting chamber 5, it is possible to maintain the casting chamber 5 in a highly airtight state with a simple structure. In addition, since the torch 19 is always in the center of the crucible a by urging the guide shaft 29 attached to the operation knob 31 by the spring 34, it becomes easy to remotely operate the upper electrode 17 by the operation knob 31. After the melting is completed, the torch 19 can be quickly returned to the original position to prepare for the next casting operation.
【００１６】尚、上記の実施例ではトーチ19を摺動且つ
回転可能に取り付けた支持軸20により移動可能に支持し
た構造のものを採用しているが、これに限定されるもの
ではなく、例えばトーチ19の適所を回転自在に軸支し
て、その頭部に磁石を埋設して鋳造室外からトーチ19を
直接遠隔操作するようにしてもよい。又、実施例では、
トーチ19を支持する支持軸20に突設した作動軸26と操作
部としての操作ツマミ31に取り付けた誘導軸29の両方に
磁石を設けているが、いずれか一方のみに磁石を取り付
けて他方には磁石が吸着しうる鉄又は鉄合金等も用いて
もよい。更に、実施例では、遠心式の鋳造装置を採用し
ているが、この鋳造装置の鋳込形式や構造には特に制限
はなく、加圧式の鋳造装置とすることもできる。In the above embodiment, a structure in which the torch 19 is movably supported by the support shaft 20 which is slidably and rotatably mounted is adopted, but the invention is not limited to this. The torch 19 may be rotatably supported at a proper position, and a magnet may be embedded in the head of the torch 19 to directly and remotely control the torch 19 from outside the casting chamber. Also, in the embodiment,
Magnets are provided on both the operating shaft 26 projecting from the support shaft 20 supporting the torch 19 and the induction shaft 29 attached to the operation knob 31 as the operating portion, but the magnet is attached to only one of them and the other is attached to the other. Alternatively, iron or an iron alloy that can be attracted by a magnet may be used. Further, although the centrifugal casting apparatus is adopted in the embodiment, the casting type and structure of this casting apparatus are not particularly limited, and a pressure type casting apparatus can be used.
【００１７】[0017]
【発明の効果】上記のように、本発明に係る鋳造装置
は、鋳造室内に位置移動可能に設けた上部電極を、磁石
を用いて鋳造室外に設けた操作部により遠隔操作可能と
したので、アーク放電による金属溶融時の局部的な加熱
を防止して均一且つ効率よく金属を溶融して全体に均質
且つ良質な鋳造品を得ることができるとともに、鋳造室
の室壁を介して磁石により内部の上部電極を遠隔操作に
より移動させるので、従来のティルティング装置のよう
に鋳造室の室壁に孔を開ける必要がなく、簡単な構造で
鋳造室を高度な気密構造とすることができる。As described above, in the casting apparatus according to the present invention, the upper electrode movably provided in the casting chamber can be remotely operated by the operating portion provided outside the casting chamber using the magnet. It is possible to prevent the local heating at the time of melting the metal due to the arc discharge and to melt the metal uniformly and efficiently to obtain a homogeneous and good quality casting product. Since the upper electrode of No. 1 is moved by remote control, it is not necessary to make a hole in the wall of the casting chamber as in the conventional tilting device, and the casting chamber can be made a highly airtight structure with a simple structure.
【図１】 本発明に係る鋳造装置の１実施例を示す斜視
図。FIG. 1 is a perspective view showing an embodiment of a casting apparatus according to the present invention.
【図２】 前記鋳造装置の鋳造室の要部を示す正面図。FIG. 2 is a front view showing a main part of a casting chamber of the casting apparatus.
【図３】 前記鋳造装置の要部を示す側断面図。FIG. 3 is a side sectional view showing a main part of the casting apparatus.
【図４】 同じく前記鋳造装置の要部を示す平断面図。FIG. 4 is a plan sectional view showing an essential part of the casting apparatus.
【図５】 前記鋳造装置における上部電極の支持構造と
操作部の構造とを示す要部の斜視図。FIG. 5 is a perspective view of a main part showing a support structure of an upper electrode and a structure of an operation unit in the casting apparatus.
ａ：坩堝、ｂ：鋳型、１：装置本体、 ２：開閉扉、
３：操作パネル、４：覗き窓、 ５：鋳造室、６：支持
部、 ７：内蓋、８：パッキン、 10：遠心鋳造機構、
11：回転軸、 12：基台、 13：螺軸、14：バランスウ
エイト、 15：坩堝装着部、16：鋳型装着部、 17：上
部電極、18：ガス噴射ノズル、 19：トーチ、20：支持
軸、 21：トーチ取付部、22：ジャバラ銅より線、 2
3：ガス導入ホース、24：回動軸、 25：ストッパー、2
6：作動軸、 27：第１の磁石、28：第２の磁石、 2
9：誘導軸、30：開孔、 31：操作ツマミ、32：スライ
ド板、 33：補強板、34：バネ、 35：下部電極、71：
段部、 72：内蓋裏面。a: crucible, b: mold, 1: device body, 2: open / close door,
3: Operation panel, 4: View window, 5: Casting chamber, 6: Support part, 7: Inner lid, 8: Packing, 10: Centrifugal casting mechanism,
11: rotating shaft, 12: base, 13: screw shaft, 14: balance weight, 15: crucible mounting part, 16: mold mounting part, 17: upper electrode, 18: gas injection nozzle, 19: torch, 20: support Axis, 21: Torch mount, 22: Bellows stranded copper wire, 2
3: Gas introduction hose, 24: Rotating shaft, 25: Stopper, 2
6: Working axis, 27: First magnet, 28: Second magnet, 2
9: Induction shaft, 30: Open hole, 31: Control knob, 32: Slide plate, 33: Reinforcement plate, 34: Spring, 35: Lower electrode, 71:
Step, 72: Back of inner lid.
フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ａ６１Ｃ 13/20 Ａ６１Ｃ 13/20 Ｃ Continuation of front page (51) Int.Cl. 6 Identification code Office reference number FI Technical display area A61C 13/20 A61C 13/20 C
Claims (4)
とその上方に配設される上部電極との間にアーク放電さ
せてアーク熱により坩堝内の金属を溶融させるようにし
た鋳造装置において、前記上部電極を位置移動可能に取
り付けるとともに、該上部電極と鋳造室外に配設した操
作部とを磁石により連動させるように構成して、鋳造室
外から操作部により上部電極を遠隔操作して位置移動可
能としたことを特徴とする鋳造装置。1. A casting apparatus in which a metal in a crucible is melted by arc heat by arc discharge between a lower electrode in a crucible arranged in a casting chamber and an upper electrode arranged above the crucible. In the above, the upper electrode is attached so as to be movable in position, and the upper electrode and an operating portion arranged outside the casting chamber are configured to be interlocked by a magnet, and the upper electrode can be remotely operated by the operating portion from outside the casting chamber. A casting device characterized in that its position can be moved.
且つ軸の廻りで回転可能な支持軸に取り付けられてお
り、該支持軸から前方へ突設した作動軸を鋳造室の内蓋
を挟んで磁石により操作部に連動するようにした請求項
１記載の鋳造装置。2. An intermediate position of the upper electrode is attached to a support shaft which is slidable in the axial direction and rotatable around the shaft, and an operating shaft projecting forward from the support shaft is attached to the inner lid of the casting chamber. The casting device according to claim 1, wherein the casting device is interlocked with the operating part by a magnet.
されている請求項１又は請求項２記載の記載の鋳造装
置。3. The casting apparatus according to claim 1, wherein the upper electrode is incorporated in an inert gas injection nozzle.
いずれかに記載の鋳造装置。4. The casting apparatus according to claim 1, which is a centrifugal casting type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8503295A JPH08281405A (en) | 1995-04-11 | 1995-04-11 | Casting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8503295A JPH08281405A (en) | 1995-04-11 | 1995-04-11 | Casting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08281405A true JPH08281405A (en) | 1996-10-29 |
Family
ID=13847369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8503295A Withdrawn JPH08281405A (en) | 1995-04-11 | 1995-04-11 | Casting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08281405A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012076134A1 (en) * | 2010-12-09 | 2012-06-14 | Dekema Dental-Keramiköfen GmbH | Press furnace for a denture or partial denture |
-
1995
- 1995-04-11 JP JP8503295A patent/JPH08281405A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012076134A1 (en) * | 2010-12-09 | 2012-06-14 | Dekema Dental-Keramiköfen GmbH | Press furnace for a denture or partial denture |
| US9022763B2 (en) | 2010-12-09 | 2015-05-05 | Dekema Dental-Keramikofen Gmbh | Press furnace for a denture or partial denture |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A761 | Written withdrawal of application |
Free format text: JAPANESE INTERMEDIATE CODE: A761 Effective date: 20041126 |