JPH0871733A - Sand mold casting device - Google Patents
Sand mold casting deviceInfo
- Publication number
- JPH0871733A JPH0871733A JP24452194A JP24452194A JPH0871733A JP H0871733 A JPH0871733 A JP H0871733A JP 24452194 A JP24452194 A JP 24452194A JP 24452194 A JP24452194 A JP 24452194A JP H0871733 A JPH0871733 A JP H0871733A
- Authority
- JP
- Japan
- Prior art keywords
- casting
- sand mold
- molten metal
- heating
- 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
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、砂型鋳造装置の改良に
関するものであって、詳しくは、薄肉鋳物を鋳造する砂
型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 an improvement in a sand casting machine, and more particularly to a sand casting machine for casting thin castings.
【0002】[0002]
【従来の技術】従来の鋳造装置として、砂型のキャビテ
ィ内に溶融金属を注湯する注湯部と、溶融金属で鋳造さ
れた鋳物を砂型から取り出す鋳物取出し部と、注湯部と
鋳物取出し部との間に設けられ、溶融金属が注湯された
砂型を鋳物取出し部まで搬送する砂型搬送部とを有する
砂型鋳造装置がある(例えば、特開平1−215456
号公報)。2. Description of the Related Art As a conventional casting apparatus, a pouring section for pouring molten metal into a cavity of a sand mold, a casting take-out section for taking out a casting cast with the molten metal from a sand mold, a pouring section and a casting take-out section. There is a sand mold casting device which is provided between the sand mold and the sand mold and which conveys the sand mold in which the molten metal is poured to the casting take-out part (for example, Japanese Patent Laid-Open No. 1-215456).
Issue).
【0003】[0003]
【発明が解決しようとする課題】従来の砂型鋳造装置を
用いて鋳物を鋳造する場合、薄肉部を持たない鋳物の鋳
造に際しては、鋳造欠陥のない良好な鋳物を鋳造するこ
とが可能であるが、薄肉部を有する鋳物の鋳造に際して
は、薄肉部を形成するキャビティ部に溶融金属が十分に
充填されず、鋳物に湯回り不良が発生し易いという問題
点がある。When casting a casting using a conventional sand casting apparatus, it is possible to cast a good casting without casting defects when casting a casting without a thin portion. When casting a casting having a thin portion, there is a problem that the cavity portion forming the thin portion is not sufficiently filled with molten metal and defective casting tends to occur in the casting.
【0004】一方、薄肉部を形成するキャビティ部に溶
融金属が十分に充填されても、薄肉部の溶融金属が急冷
されると、その急冷された部分がチル化してチルクラッ
クが入り易いという問題点がある。On the other hand, even if the molten metal in the thin-walled portion is sufficiently filled with the molten metal, if the molten metal in the thin-walled portion is rapidly cooled, the rapidly cooled portion is chilled and chill cracks are likely to occur. There is.
【0005】そこで、本発明は、かかる問題点を解消す
るためになされたもので、鋳物の薄肉部に湯回り不良や
チルクラックが発生しにくい砂型鋳造装置を提供するこ
とを目的とする。Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a sand casting apparatus in which a molten metal defect and a chill crack are less likely to occur in a thin portion of a casting.
【0006】[0006]
【課題を解決するための手段】本発明の砂型鋳造装置
は、砂型のキャビティ内に溶融金属を注湯する注湯部
と、前記溶融金属で鋳造された鋳物を前記砂型から取り
出す鋳物取出し部と、前記注湯部と前記鋳物取出し部と
の間に設けられ、前記溶融金属が注湯された前記砂型を
前記鋳物取出し部まで搬送する砂型搬送部とを有するも
のであって、前記砂型搬送部の搬送工程の途中に少なく
とも2つの加熱コイルを有する電磁誘導加熱部を設け、
前記注湯部側に設けた第1加熱コイルで前記砂型内の溶
融金属または半溶融金属を電磁誘導加熱し、前記第1加
熱コイルより前記鋳物取出し部側に設けた第2加熱コイ
ル以降の加熱コイルで前記砂型中で冷却凝固した鋳物を
電磁誘導加熱するものである。A sand mold casting apparatus of the present invention comprises a pouring part for pouring molten metal into a cavity of a sand mold, and a casting take-out part for taking out a casting cast with the molten metal from the sand mold. A sand mold transporting unit that is provided between the pouring unit and the casting unloading unit and that transports the sand mold in which the molten metal has been poured to the casting unloading unit. An electromagnetic induction heating section having at least two heating coils is provided in the middle of the carrying step of
Electromagnetic induction heating of molten metal or semi-molten metal in the sand mold with a first heating coil provided on the pouring part side, and heating after a second heating coil provided on the casting extraction part side with respect to the first heating coil. A coil is used for electromagnetic induction heating of a casting that is cooled and solidified in the sand mold.
【0007】電磁誘導加熱部が設けられる位置は特に定
まったものではなく、注湯部に隣接して設けられてもよ
く、注湯部と離間して設けられてもよい。電磁誘導加熱
を注湯直後に実施してもよく、所定時間経過後に実施し
てもよいが、第1加熱コイルと第2加熱コイルとは、所
定距離を隔てて配置する。The position at which the electromagnetic induction heating section is provided is not particularly fixed, and it may be provided adjacent to the pouring section or separately from the pouring section. The electromagnetic induction heating may be performed immediately after pouring the molten metal or after a predetermined time has elapsed, but the first heating coil and the second heating coil are arranged at a predetermined distance.
【0008】加熱コイルの種類は特に限定されず、その
巻形状はソレノイド形や楕円形等種々の形状が許容さ
れ、その断面形状も円形,方形,矩形等種々の形状が許
容される。The type of the heating coil is not particularly limited, and various winding shapes such as a solenoid shape and an elliptical shape are allowed, and various sectional shapes such as a circular shape, a square shape, and a rectangular shape are allowed.
【0009】[0009]
【作用】砂型のキャビティ内に溶融金属を注湯した後、
該砂型を砂型搬送部を介して鋳物取出し部方向に搬送す
る。その際、該キャビティ内に注湯した該溶融金属、又
は該キャビティ内で溶融金属の一部が凝固した半溶融金
属が電磁誘導加熱部の第1加熱コイルによって電磁誘導
加熱され、高温溶解した流動性の良い該溶融金属が該キ
ャビティの隅々まで流入して充填される。[Function] After pouring molten metal into the sand mold cavity,
The sand mold is conveyed toward the casting take-out portion via the sand mold conveying section. At that time, the molten metal poured into the cavity or the semi-molten metal in which a part of the molten metal is solidified in the cavity is electromagnetically induction-heated by the first heating coil of the electromagnetic induction heating unit and melted at a high temperature. The molten metal having good property flows into and is filled into every corner of the cavity.
【0010】次いで、該キャビティ内に充填された該溶
融金属が凝固して鋳物が形成され、該鋳物が該電磁誘導
加熱部の第2加熱コイル以降の各加熱コイルによって電
磁誘導加熱され、該砂型内で焼なまされた該鋳物が鋳物
取出し部まで搬送される。その際、該電磁誘導加熱部で
は該砂型は加熱されないため、冷却は該溶融金属または
該鋳物の電磁誘導加熱が行われない場合と同様に行われ
る。Then, the molten metal filled in the cavity is solidified to form a casting, and the casting is electromagnetically heated by each heating coil after the second heating coil of the electromagnetic induction heating unit, and the sand mold The casting annealed therein is conveyed to the casting take-out section. At this time, since the sand mold is not heated in the electromagnetic induction heating section, cooling is performed in the same manner as in the case where the electromagnetic induction heating of the molten metal or the casting is not performed.
【0011】[0011]
【実施例】以下、本発明の実施例を無枠砂型鋳造装置に
ついて説明する。図1に無枠砂型鋳造装置が示され、該
無枠砂型鋳造装置は、注湯部1と砂型搬送部2と電磁誘
導加熱部3と鋳物取出し部4とから形成されている。EXAMPLES Examples of the present invention will be described below with respect to a frameless sand casting apparatus. FIG. 1 shows a frameless sand casting apparatus, which is composed of a pouring section 1, a sand carrier section 2, an electromagnetic induction heating section 3 and a casting removal section 4.
【0012】注湯部1は、溶融金属11を縦型無枠砂型
22のキャビティ24内に注湯する取鍋12と取鍋12
を任意の角度傾動させる取鍋傾動装置(図示せず)とか
ら形成される。The pouring part 1 is a ladle 12 and a ladle 12 for pouring the molten metal 11 into the cavity 24 of the vertical frameless sand mold 22.
And a ladle tilting device (not shown) for tilting the ladle at any angle.
【0013】砂型搬送部2は、注湯部1側から鋳物取出
し部4側に向かって水平に延在した長尺状のスライド板
21と図示しない造型機の押出シリンダとから形成さ
れ、スライド板21の前方端部は斜め下方に屈曲し、ス
ライド板21上には造型された縦型無枠砂型22が注湯
部1側から鋳物取出し部4側に向かって前進可能に載置
されている。各縦型無枠砂型22の前面および後面に
は、半割りのキャビティ23が形成され、縦型無枠砂型
22が型合わせされた際にキャビティ24が形成され
る。The sand mold conveying section 2 is formed of a long slide plate 21 extending horizontally from the pouring section 1 side toward the casting unloading section 4 side and an extrusion cylinder of a molding machine (not shown). The front end of 21 is bent obliquely downward, and a vertical vertical frameless sand mold 22 formed on the slide plate 21 is placed so as to be able to move forward from the pouring part 1 side toward the casting unloading part 4 side. . A cavity 23 is divided into halves on the front surface and the rear surface of each vertical frameless sand mold 22, and a cavity 24 is formed when the vertical frameless sand mold 22 is matched.
【0014】電磁誘導加熱部3は、取鍋12に近接して
設けた第1加熱コイル31と、第1加熱コイル31と所
定距離(δ)離間して設けた第2加熱コイル32と、該
両加熱コイル31,32にそれぞれ接続した第1〜2電
力制御部33,34と、加熱制御部35とから形成さ
れ、該両電力制御部33,34は加熱制御部35および
外部電源36と接続し、第1〜2加熱コイル31,32
には加熱制御部35の指令に応じて第1〜2電力制御部
33,34で制御された電力が外部電源36から供給さ
れる。The electromagnetic induction heating section 3 includes a first heating coil 31 provided near the ladle 12, a second heating coil 32 provided at a predetermined distance (δ) from the first heating coil 31, and It is formed of first and second power control units 33 and 34 respectively connected to both heating coils 31 and 32, and a heating control unit 35, and both power control units 33 and 34 are connected to the heating control unit 35 and an external power supply 36. The first and second heating coils 31, 32
The electric power controlled by the first and second electric power control units 33 and 34 is supplied from the external power source 36 according to the instruction of the heating control unit 35.
【0015】該両加熱コイル31,32は、ソレノイド
コイルから形成され、該両加熱コイル31,32の内部
空間内をスライド板21が挿通すると共に、縦型無枠砂
型22が通過可能に形成され、該両加熱コイル31,3
2の外周には、通電時に磁気回路を形成する加熱コイル
支持具37が嵌装されている。The heating coils 31 and 32 are formed of solenoid coils, and the slide plate 21 is inserted through the internal space of the heating coils 31 and 32, and the vertical frameless sand mold 22 is formed so as to pass therethrough. , The heating coils 31, 3
A heating coil support member 37 that forms a magnetic circuit when energized is fitted around the outer periphery of 2.
【0016】鋳物取出し部4は、崩壊した縦型無枠砂型
22から鋳物41を取り出す鋳物取出し具(図示せず)
と鋳物砂を排出するためのコンベヤ42とから形成され
ている。The casting take-out section 4 is a casting take-out tool (not shown) for taking out the cast 41 from the collapsed vertical frameless sand mold 22.
And a conveyor 42 for discharging foundry sand.
【0017】次に作動について説明する。造型された縦
型無枠砂型22が無枠造型機(図示せず)から順次スラ
イド板21上に送り出され、スライド板21上で各縦型
無枠砂型22が型合わせされると、隣接する各縦型無枠
砂型22間にキャビティ24が形成される。Next, the operation will be described. The vertical vertical frameless sand molds 22 that have been molded are sequentially sent out from the frameless molding machine (not shown) onto the slide plate 21, and when the vertical vertical frameless sand molds 22 are matched on the slide plate 21, they are adjacent to each other. A cavity 24 is formed between each vertical frameless sand mold 22.
【0018】縦型無枠砂型22が取鍋12のところまで
前進してくると、取鍋12から縦型無枠砂型22のキャ
ビティ24内に1400℃の溶融金属11が注湯される
(図2中でA点)。次いで、縦型無枠砂型22が所定電
力が供給された第1加熱コイル31内を通過する際に、
キャビティ24内で冷却しつつある溶融金属11が第1
加熱コイル31によって電磁誘導加熱(図2中でBから
C点に至る間)され、約1400℃に加熱保持された溶
融金属11がキャビティ24の隅々まで流入して充填さ
れる。When the vertical frameless sand mold 22 moves forward to the ladle 12, the molten metal 11 at 1400 ° C. is poured from the ladle 12 into the cavity 24 of the vertical frameless sand mold 22 (see FIG. Point A in 2.) Then, when the vertical frameless sand mold 22 passes through the inside of the first heating coil 31 to which the predetermined power is supplied,
The molten metal 11 cooling in the cavity 24 is the first
The molten metal 11 heated by electromagnetic heating (between points B and C in FIG. 2) by the heating coil 31 and held at about 1400 ° C. flows into and fills every corner of the cavity 24.
【0019】その後、縦型無枠砂型22がスライド板2
1上を前進中に、キャビティ24内の溶融金属11が凝
固して鋳物41が形成される。鋳物41が約900℃ま
で冷え(図2中D点)、縦型無枠砂型22が所定電力が
供給された第2加熱コイル32内を通過する際に、第2
加熱コイル32によって鋳物22が電磁誘導加熱され約
900℃に保持される。縦型無枠砂型22が第2加熱コ
イル32を通過し(図2中E点)、スライド板21上を
前進している間に、鋳物41は縦型無枠砂型22内で冷
却され、焼きなまされる。After that, the vertical frameless sand mold 22 is attached to the slide plate 2.
While advancing over 1, the molten metal 11 in the cavity 24 is solidified to form a casting 41. When the casting 41 cools to about 900 ° C. (point D in FIG. 2) and the vertical frameless sand mold 22 passes through the inside of the second heating coil 32 to which a predetermined power is supplied,
The casting 22 is subjected to electromagnetic induction heating by the heating coil 32 and is maintained at about 900 ° C. While the vertical frameless sand mold 22 passes through the second heating coil 32 (point E in FIG. 2) and moves forward on the slide plate 21, the casting 41 is cooled in the vertical frameless sand mold 22 and baked. Be fooled.
【0020】縦型無枠砂型22は、第1〜2加熱コイル
31,32によって電磁誘導加熱されないため、鋳物4
1が第2加熱コイル32を通過した後は、電磁誘導加熱
されない縦型無枠砂型22内の鋳物とほぼ同様に冷却さ
れる。The vertical frameless sand mold 22 is not subjected to electromagnetic induction heating by the first and second heating coils 31 and 32, so that the casting 4
After 1 passes through the second heating coil 32, it is cooled in substantially the same manner as the casting in the vertical frameless sand mold 22 that is not subjected to electromagnetic induction heating.
【0021】その後、縦型無枠砂型22がスライド板2
1上を引き続き前進し、スライド板21の先端傾斜部で
縦型無枠砂型22が自重により崩壊し、コンべヤ42上
に鋳物41および鋳物砂が落下する。次いで、鋳物41
は鋳物取出し具(図示せず)によりコンベヤ42上から
取り出され、鋳物砂はコンベヤ42によって排出され
る。After that, the vertical frameless sand mold 22 is attached to the slide plate 2.
1, the vertical frameless sand mold 22 collapses due to its own weight at the tip inclined portion of the slide plate 21, and the casting 41 and the casting sand fall on the conveyor 42. Then, casting 41
Is taken out of the conveyor 42 by a casting take-out tool (not shown), and the foundry sand is discharged by the conveyor 42.
【0022】本発明の鋳造装置は、無枠砂型鋳造装置の
みならず、有枠砂型鋳造装置にも適用可能である。砂型
としては、縦型無枠砂型のみならず、横型無枠砂型,有
枠砂型,乾燥砂が充填された消失模型鋳造用の鋳型等を
使用できる。なお、有枠砂型を用いる場合、鋳枠は非導
電性かつ非磁性の素材で形成されていることが望まし
い。The casting apparatus of the present invention can be applied not only to the frameless sand type casting apparatus but also to the framed sand type casting apparatus. As the sand mold, not only the vertical unframed sand mold, but also the horizontal unframed sand mold, the framed sand mold, the mold for vanishing model casting filled with dry sand, and the like can be used. When the framed sand mold is used, it is desirable that the flask be made of a non-conductive and non-magnetic material.
【0023】[0023]
【発明の効果】本発明によれば、湯回り不良及びチルク
ラックの発生が防止され、鋳造欠陥のない良好な鋳物を
歩留りよく鋳造できる。According to the present invention, defective casting and the occurrence of chill cracks are prevented, and good castings free from casting defects can be cast with high yield.
【図1】本発明にかかる砂型鋳造装置の正面断面図であ
る。FIG. 1 is a front sectional view of a sand casting apparatus according to the present invention.
【図2】砂型内の溶湯および鋳物の温度変化を示すグラ
フである。FIG. 2 is a graph showing temperature changes of the molten metal and the casting in the sand mold.
2 砂型搬送部 3 電磁誘導加熱部 4 鋳物取出し部 22 砂型 31 第1加熱コイル 32 第2加熱コイル 41 鋳物 2 sand mold conveying part 3 electromagnetic induction heating part 4 casting removal part 22 sand mold 31 first heating coil 32 second heating coil 41 casting
Claims (1)
る注湯部と、 前記溶融金属で鋳造された鋳物を前記砂型から取り出す
鋳物取出し部と、 前記注湯部と前記鋳物取出し部との間に設けられ、前記
溶融金属が注湯された前記砂型を前記鋳物取出し部まで
搬送する砂型搬送部とを有する砂型鋳造装置であって、 前記砂型搬送部の搬送工程の途中に少なくとも2つの加
熱コイルを有する電磁誘導加熱部を設け、前記注湯部側
に設けた第1加熱コイルで前記砂型内の溶融金属または
半溶融金属を電磁誘導加熱し、前記第1加熱コイルより
前記鋳物取出し部側に設けた第2加熱コイル以降の加熱
コイルで前記砂型中で冷却凝固した鋳物を電磁誘導加熱
することを特徴とする砂型鋳造装置。1. A pouring part for pouring molten metal into a cavity of a sand mold, a casting take-out part for taking out a casting cast with the molten metal from the sand mold, the pouring part and the casting take-out part. A sand mold casting apparatus having a sand mold transporting unit for transporting the sand mold in which the molten metal is poured to the casting removal unit, wherein at least two heating operations are performed during the transporting process of the sand mold transporting unit. An electromagnetic induction heating unit having a coil is provided, and the molten metal or semi-molten metal in the sand mold is electromagnetically induction heated by the first heating coil provided on the pouring unit side, and the casting extraction unit side from the first heating coil. A sand mold casting apparatus, wherein a casting coil cooled and solidified in the sand mold is subjected to electromagnetic induction heating by a heating coil subsequent to the second heating coil provided in.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24452194A JP3299641B2 (en) | 1994-08-31 | 1994-08-31 | Sand casting equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24452194A JP3299641B2 (en) | 1994-08-31 | 1994-08-31 | Sand casting equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0871733A true JPH0871733A (en) | 1996-03-19 |
JP3299641B2 JP3299641B2 (en) | 2002-07-08 |
Family
ID=17119928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24452194A Expired - Fee Related JP3299641B2 (en) | 1994-08-31 | 1994-08-31 | Sand casting equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3299641B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8056608B2 (en) | 2008-04-25 | 2011-11-15 | Goodwin Plc | Method of mitigating against thermal contraction induced cracking during casting of a super Ni alloy |
-
1994
- 1994-08-31 JP JP24452194A patent/JP3299641B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8056608B2 (en) | 2008-04-25 | 2011-11-15 | Goodwin Plc | Method of mitigating against thermal contraction induced cracking during casting of a super Ni alloy |
Also Published As
Publication number | Publication date |
---|---|
JP3299641B2 (en) | 2002-07-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20180036928A1 (en) | Data management system | |
US6588487B2 (en) | Methods and apparatus for utilization of chills for casting | |
PE20020370A1 (en) | METHOD AND APPARATUS FOR MOLDING METALS | |
US20090288794A1 (en) | Method and apparatus for manufacturing metal bars or ingots | |
CN103978156A (en) | Method for controlling coagulation and cooling of investment castings | |
CN109128054A (en) | A kind of casting technique of ironcasting | |
PL189660B1 (en) | Method of making light metal alloy castings, sytem therefor and casting mould for use in such method | |
CA1092782A (en) | Linear permanent mould casting system | |
JPH0871733A (en) | Sand mold casting device | |
CN209918861U (en) | Composite graphite chill | |
JPH07155897A (en) | Mold structure and casting method | |
US4304288A (en) | Linear permanent mould casting system | |
JPS6354466B2 (en) | ||
WO1991012104A1 (en) | Vertical pour casting process | |
JPH0871731A (en) | Casting method | |
JPH0829397B2 (en) | Alternating die moving tilt type vertical casting machine | |
JPH03174965A (en) | Method and apparatus for injection forming | |
EP4240548A1 (en) | A hybrid method for casting manufacture using hybrid moulds | |
JPH10277702A (en) | Heat insulating device for runner of mold | |
CN111940693A (en) | Die casting method and die casting device | |
JPS60255261A (en) | Metal flask transfer type casting installation | |
JP2004025259A (en) | Casting apparatus and method with metallic mold | |
JPS591062A (en) | Knock-out line for casting mold | |
JPH02217155A (en) | Method and apparatus for casting into metallic mold | |
JPH06210437A (en) | Production of casting product |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090419 Year of fee payment: 7 |
|
LAPS | Cancellation because of no payment of annual fees |