JPH04231143A - Achieving device for low pressure multistage casting, its mold and its device - Google Patents
Achieving device for low pressure multistage casting, its mold and its deviceInfo
- Publication number
- JPH04231143A JPH04231143A JP3150561A JP15056191A JPH04231143A JP H04231143 A JPH04231143 A JP H04231143A JP 3150561 A JP3150561 A JP 3150561A JP 15056191 A JP15056191 A JP 15056191A JP H04231143 A JPH04231143 A JP H04231143A
- Authority
- JP
- Japan
- Prior art keywords
- casting
- spout
- sand mold
- stage
- pressure
- 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 51
- 239000004576 sand Substances 0.000 claims abstract description 20
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 238000005058 metal casting Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 21
- 229910052751 metal Inorganic materials 0.000 abstract description 21
- 230000003628 erosive effect Effects 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 8
- 229910001018 Cast iron Inorganic materials 0.000 description 6
- 239000007788 liquid Substances 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/20—Stack moulds, i.e. arrangement of multiple moulds or flasks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
Landscapes
- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Devices For Molds (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Continuous Casting (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Mold Materials And Core Materials (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Manufacture Of Motors, Generators (AREA)
- Producing Shaped Articles From Materials (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、片側だけ開放された多
段式砂型での金属の低圧鋳造に係わる。本発明は第１に
、片側だけ開放された多段式砂型の空洞に低圧下で溶融
金属を供給する方法に係わる。この供給は、鋳込み口と
、各段毎に前記鋳込み口から延びる少なくとも１つの中
間通路と、この通路を各空洞に接続する堰とを介して実
施される。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the low-pressure casting of metals in multi-stage sand molds that are open on one side. The invention primarily relates to a method for supplying molten metal under low pressure into the cavity of a multi-stage sand mold that is open on one side. This supply is carried out via a casting spout, at least one intermediate passage extending from said spout for each stage, and a weir connecting this passage to each cavity.
【０００２】低圧鋳造（例えば本出願人の仏国特許出願
ＦＲ−Ａ−２ ２９５ ８０８号、２ ３６７
５６６号及び２ ５５６ ９９６号参照）は、重
力による鋳造に比べると、壁の薄い及び／又は形状が複
雑な及び／又は寸法の大きい金属製品の製造では特に有
利である。実際、液体金属を収容する気密性鋳鍋へのガ
スの注入の結果として金属に加えられる圧力は、金属を
空洞の隅々まで流動させるべく随意に制御することがで
きる。Low-pressure casting (for example, French patent applications FR-A-2 295 808, 2 367 of the applicant)
566 and 2 556 996) is particularly advantageous in the production of metal products with thin walls and/or complex shapes and/or large dimensions compared to gravity casting. In fact, the pressure exerted on the metal as a result of the injection of gas into the gas-tight casting pot containing the liquid metal can be controlled at will to cause the metal to flow throughout the cavity.
【０００３】0003
【従来の技術】従来の方法では、鋳型の各段毎に、横断
面積の大きい単一の中間通路又は互いに反対方向に延び
る横断面積の大きい２つの中間通路が鋳込み口を対応段
の一連の堰に接続するようになっている。BACKGROUND OF THE INVENTION In conventional methods, for each stage of a mold, a single intermediate passage with a large cross-sectional area or two intermediate passages with a large cross-sectional area extending in opposite directions connect the casting opening to a series of weirs in the corresponding stage. It is designed to connect to.
【０００４】このような構造は、１つ以上の中間通路の
大きな横断面積に起因して、下記の問題を有する。Such structures have the following problems due to the large cross-sectional area of the one or more intermediate passages.
【０００５】（１）金属流に大きな乱れが発生し、その
結果砂の侵食及び気泡の吸蔵が促進されるため、形成さ
れる製品に欠陥が生じる。(1) Significant turbulence occurs in the metal flow, which promotes sand erosion and bubble occlusion, resulting in defects in the formed product.
【０００６】（２）金属を鋳込み口の最上部まで高速で
上昇させることができず、充填が一段ずつ行われるため
、低圧鋳造の利点の総てを活かすことができない。(2) It is not possible to raise the metal to the top of the casting spout at high speed, and filling is performed step by step, making it impossible to take advantage of all the advantages of low-pressure casting.
【０００７】（３）堰が凝固して閉塞機能を果たすよう
になった後で圧力を緩めると（前出のＦＲ−Ａ−２
２９５ ８０８号参照）、中間通路内の金属、即ち著
しく冷却された比較的大量の金属が鋳鍋に戻される。次
の鋳込みではこの冷却した金属が最初に鋳込み口内を上
昇するため、鋳造製品の一部に品質低下が生じる。同じ
理由で、鋳込み毎に過剰の金属移動が必要となる。(3) If the pressure is relieved after the weir has solidified and started to perform the blocking function (FR-A-2 mentioned above)
295 808), the metal in the intermediate passage, ie a relatively large amount of metal which has been significantly cooled, is returned to the casting pot. During the next pour, this cooled metal first rises through the pour spout, resulting in some quality loss of the cast product. For the same reason, excessive metal transfer is required for each pour.
【０００８】[0008]
【発明が解決しようとする課題】本発明の目的はこれら
の問題を解決することにある。SUMMARY OF THE INVENTION It is an object of the present invention to solve these problems.
【０００９】[0009]
【課題を解決するための手段】そのために本発明の方法
は、液体金属の流量を各段毎に中間通路の入口で絞るこ
とを特徴とする。To this end, the method of the invention is characterized in that the flow rate of the liquid metal is throttled at each stage at the entrance of the intermediate channel.
【００１０】本発明の方法はその他に下記の特徴を有す
る。The method of the present invention also has the following features.
【００１１】− 液体金属が中間通路に流入した後で
、特に堰に入る時に、該金属への圧力が緩和されるよう
にする。- ensuring that the pressure on the liquid metal is relieved after it has entered the intermediate channel, especially when it enters the weir;
【００１２】− 液体金属を総ての中間通路より上に
上昇させるのに適した流量で導入管に送給する。- Feed the liquid metal into the inlet tube at a flow rate suitable to raise it above all intermediate passages.
【００１３】− 鋳型の供給圧力を総ての中間通路が
凝固するまで維持し、その後この圧力を緩める。- Maintaining the supply pressure of the mold until all intermediate passages have solidified and then releasing this pressure.
【００１４】本発明は、この方法を実施するための片側
だけ開放された砂型にも係わる。この鋳型は、１つの鋳
込み口と少なくとも２つの段とを含み、各段毎に少なく
とも１つの空洞が具備されており、この空洞への供給が
少なくとも１つの中間通路によって鋳込み口に接続され
た複数の堰を介して行われるようになっており、各段の
中間通路の入口の横断面積の合計が鋳込み口の横断面積
より遥かに小さいことを特徴とする。The invention also relates to a sand mold, open on one side, for carrying out this method. The mold includes a spout and at least two stages, each stage having at least one cavity, the supply of which is connected to the spout by at least one intermediate passage. It is characterized in that the sum of the cross-sectional areas of the entrances of the intermediate passages of each stage is much smaller than the cross-sectional area of the pouring opening.
【００１５】本発明の鋳型は下記の特徴も有する。[0015] The mold of the present invention also has the following features.
【００１６】− 同一の通路を介して供給が行われる
複数の堰の横断面積の合計が少なくともその通路の入口
の横断面積と同じである。- the sum of the cross-sectional areas of the weirs fed via the same passage is at least equal to the cross-sectional area of the entrance to the passage;
【００１７】− 各空洞への供給が鋳込み口の両側に
延びる少なくとも２つの中間通路を介して行われる。- The supply of each cavity takes place via at least two intermediate channels extending on either side of the pouring spout.
【００１８】− 各段の中間通路の入口の横断面積の
合計が鋳込み口の横断面積の１０％以下である。- The sum of the cross-sectional areas of the inlets of the intermediate passages of each stage is less than 10% of the cross-sectional area of the casting spout.
【００１９】本発明は、片側だけ開放された多段式砂型
で金属の低圧鋳造を行うための装置にも係わる。この装
置は、鋳鍋と、該鋳鍋から上方に延びて上向きの開口を
有する導入管と、前記鋳鍋に接続された加圧ガス源と、
下向きの開口を有する鋳込み口の他に少なくとも２つの
段を含み、各段に少なくとも１つの空洞が具備されてお
り、少なくとも１つの中間通路により前記鋳込み口に接
続された複数の堰を介して前記空洞への供給が行われる
ようになっている少なくとも１つの片側だけ開放された
砂型と、鋳込み口の底部を前記導入管の開口に当接させ
る手段とを含むタイプであって、鋳型が前述の定義に従
うものであることを特徴とする。The invention also relates to an apparatus for low-pressure casting of metals in a multi-stage sand mold that is open on one side. The apparatus includes a casting pot, an inlet pipe extending upwardly from the casting pot and having an upward opening, and a pressurized gas source connected to the casting pot.
In addition to the casting spout with a downward opening, the casting spout comprises at least two stages, each stage being provided with at least one cavity, and connected to the casting spout by at least one intermediate passage. of the type comprising at least one side-open sand mold adapted for supplying the cavity, and means for bringing the bottom of the casting spout into contact with the opening of the introduction tube, the mold being of the aforementioned type; It is characterized by following the definition.
【００２０】[0020]
【実施例】ここで、添付図面を参照しながら非限定的実
施例を挙げて本発明をより詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention will now be explained in more detail by way of non-limiting examples with reference to the accompanying drawings.
【００２１】図１に示した装置は、液体金属２を収容す
る鋳鍋又はリザーバを構成する容器１と、鋳型支持フレ
ーム３と、砂型４とを含む。この装置は、鋳鉄（ねずみ
鋳鉄もしくは球状黒鉛鋳鉄）、鋼鉄又は超合金を鋳型４
で低圧鋳造するのに使用される。鋳型の内部構造を除け
ば、この装置は前出のＦＲ−Ａ−２ ２９５ ８０
８号に記載の装置と同じである。The apparatus shown in FIG. 1 includes a vessel 1 constituting a pot or reservoir containing liquid metal 2, a mold support frame 3, and a sand mold 4. This equipment can be used to cast cast iron (gray cast iron or spheroidal graphite cast iron), steel or superalloy into a mold 4.
used for low pressure casting. Except for the internal structure of the mold, this device is similar to the above-mentioned FR-A-2 295 80.
It is the same as the device described in No. 8.
【００２２】固定鋳鍋１は、側壁に気密的に固定され且
つ適当な手段（図示せず）によってロックされた上方蓋
５を含む。この蓋５には孔７が設けられており、この孔
に鋳込みノズル６が挿入されている。このノズル６は、
孔７の直径に対応する外径を有する管状下方部分８と、
全体的に円錐台形の上方部分９とを含み、この上方部分
が大きい方の平面状底部１０を介して前記孔の周縁に気
密的に当接している。このノズルの底部１０には溝が設
けられており、その中に石綿の紐からなる密封パッキン
１１が配置されている。耐熱材からなる導入管１２はノ
ズル６を貫通し、鋳鍋１の底部の近傍まで延びている。
導入管１２の上方部分はノズル６の平面状上表面の中央
部に連通している。The stationary casting pot 1 includes an upper lid 5 which is hermetically fixed to the side wall and locked by suitable means (not shown). This lid 5 is provided with a hole 7, into which a casting nozzle 6 is inserted. This nozzle 6 is
a tubular lower part 8 having an outer diameter corresponding to the diameter of the bore 7;
A generally frustoconical upper part 9 rests in a gas-tight manner on the periphery of the bore via a larger planar base 10. The bottom 10 of this nozzle is provided with a groove in which a sealing packing 11 made of asbestos string is arranged. An introduction pipe 12 made of a heat-resistant material passes through the nozzle 6 and extends to near the bottom of the casting pot 1. The upper portion of the introduction tube 12 communicates with the center of the planar upper surface of the nozzle 6 .
【００２３】鋳鍋１は管１４を介して加圧ガス源１３に
接続されており、鋳鍋１と圧力源１３又は大気との連通
は鋳鍋外部の適当な手段１５を介して実施される。鋳込
み時の鋳鍋内の圧力はマノメータ１６によって観察され
る。The casting pot 1 is connected via a pipe 14 to a pressurized gas source 13, and the communication between the casting pot 1 and the pressure source 13 or the atmosphere is effected via suitable means 15 external to the casting pot. . The pressure inside the casting pot during casting is observed by a manometer 16.
【００２４】フレーム３は、２つのレール１９の上を走
るローラ１８を底部に備えた側柱１７を含む。The frame 3 includes a side post 17 with a roller 18 at the bottom running on two rails 19.
【００２５】側柱１７は上端部で天井部分２０を介して
互いに接続されている。この天井部分には下向きに延び
るジャッキ２１が取付けられており、該ジャッキのピス
トンロッド２２の下端部には当接プレート２３が枢着さ
れている。The side columns 17 are connected to each other at their upper ends via a ceiling portion 20. A jack 21 extending downward is attached to this ceiling portion, and an abutment plate 23 is pivotally attached to the lower end of the piston rod 22 of the jack.
【００２６】各側柱１７はつば２４も有し、このつばに
コイルばね２５が当接している。水平支持プレート２６
は側柱１７のつば２４より上の部分に沿って垂直に滑動
し得る。このプレート２６は常にばね２５の上端部に当
接しており、このばねにより上向きの応力を受ける。プ
レート２６に下方への圧力が全く加えられていない時は
、該プレートがノズル６の上表面より上の位置にある。
プレート２６には、ノズル６を通すのに十分な大きさの
直径を有する円形孔２７が設けられている。Each side post 17 also has a collar 24 against which a coil spring 25 rests. Horizontal support plate 26
can slide vertically along the part of the side post 17 above the collar 24. This plate 26 is always in contact with the upper end of the spring 25 and is subjected to upward stress by this spring. When no downward pressure is applied to plate 26, it is above the upper surface of nozzle 6. The plate 26 is provided with a circular hole 27 having a diameter large enough to allow the nozzle 6 to pass through.
【００２７】鋳型４は、図２に示すように、例えば３つ
の段を含む多段式の片側だけ解放された充実鋳型である
。この鋳型は、導入管１２とほぼ同じ直径の円形断面を
もつ垂直鋳込み口２８を有する。この鋳込み口は底部が
開放されており、この底部がノズル６の形状と合致する
末広状の円錐台形状の収容部２９を有する。この鋳込み
口は鋳型の上端部から幾らか距離をおいた地点まで延び
る。The mold 4 is, as shown in FIG. 2, a multi-stage solid mold with only one side open, including, for example, three stages. The mold has a vertical pour spout 28 with a circular cross-section of approximately the same diameter as the inlet tube 12. The casting port is open at the bottom, and has a accommodating portion 29 in the shape of a widening truncated cone that matches the shape of the nozzle 6. The spout extends some distance from the top of the mold.
【００２８】３つの段はいずれも同じであり、図３のよ
うな構造を有する。この構造では、鋳込み口２８から２
つの通路３０Ａ及び３０Ｂが鋳込み口２８を挟んで互い
の延長部をなすように水平に延びている。各段は更に同
一の細長い形状をした空洞３１を２つ含む。これらの空
洞は鋳込み口２８の両側に存在し、３つの堰を介して液
体金属を受給する。この実施例では、各空洞毎に鋳込み
口を挟んで片側に１つの堰３２Ａ又は３２Ｂ、反対側に
２つの堰３２Ｂ又は３２Ａが具備されている。３つの堰
３２Ａは空洞を通路３０Ａに接続し、３つの堰３２Ｂは
空洞を通路３０Ｂに接続する。従って各通路３０Ａ又は
３０Ｂは、鋳込み口２８を該鋳込み口２８を挟んで同じ
側に位置する総ての堰に接続し、その段の２つの空洞へ
の供給に使用される。All three stages are the same and have a structure as shown in FIG. In this structure, from the casting port 28 to 2
The two passages 30A and 30B extend horizontally with the casting port 28 in between, forming extensions of each other. Each stage further includes two cavities 31 of identical elongated shape. These cavities exist on either side of the spout 28 and receive liquid metal via three weirs. In this embodiment, each cavity is provided with one weir 32A or 32B on one side of the casting opening and two weirs 32B or 32A on the opposite side. Three weirs 32A connect the cavity to passage 30A, and three weirs 32B connect the cavity to passage 30B. Each passage 30A or 30B is therefore used to connect the spout 28 to all weirs located on the same side of the spout 28, and to feed the two cavities of that stage.
【００２９】通路３０Ａ及び３０Ｂは横断面積が比較的
小さい。より正確には、１つの段の中間通路３０Ａ及び
３０Ｂの横断面積の合計は鋳込み口２８の横断面積より
遥かに小さく、例えばその１０％以下である。これらの
通路の横断面積が変化する場合は、これらの通路の入口
の横断面積がこの条件を満たすようにする。Passages 30A and 30B have relatively small cross-sectional areas. More precisely, the sum of the cross-sectional areas of the intermediate passages 30A and 30B of one stage is much smaller than the cross-sectional area of the casting spout 28, for example less than 10% thereof. If the cross-sectional area of these passages varies, the cross-sectional area of the entrance to these passages should meet this condition.
【００３０】また、同一の通路を介して供給を受ける複
数の堰の横断面積の合計は、少なくともその通路の入口
の横断面積と同じにする。Furthermore, the total cross-sectional area of the plurality of weirs that receive supply through the same passage is at least equal to the cross-sectional area of the entrance of the passage.
【００３１】この装置は下記のように操作する。フレー
ム３を鋳鍋１から離した状態で、適当な耐熱性シール３
３を鋳型４の収容部２９の底部に適用する。各空洞内に
中子（図示せず）を入れた鋳型４をプレート２６上に配
置し、該プレートの中央孔２７に対して調心する。次い
でフレーム３をレール１９上で滑動させて液状鋳鉄の鋳
鍋１の上方に移動させ、ノズル６と鋳型の収容部２９と
が向かい合うようにする。この状態でジャッキ２１を伸
ばすことにより、ばね２５の力に逆らいながらプレート
２３を介して鋳型４及び支持体２６を下降させる。この
操作の結果シール３３が収容部２９の底部とノズル６と
の間で締付けられ、鋳込み口と導入管とが気密的に接続
される。The apparatus operates as follows. With the frame 3 separated from the casting pot 1, apply a suitable heat-resistant seal 3.
3 is applied to the bottom of the housing 29 of the mold 4. A mold 4 with a core (not shown) in each cavity is placed on the plate 26 and centered with respect to the central hole 27 of the plate. The frame 3 is then slid on the rails 19 and moved above the liquid cast iron ladle 1 so that the nozzle 6 and the mold housing 29 face each other. By extending the jack 21 in this state, the mold 4 and the support 26 are lowered via the plate 23 while resisting the force of the spring 25. As a result of this operation, the seal 33 is tightened between the bottom of the accommodating portion 29 and the nozzle 6, and the casting port and the introduction pipe are connected in an airtight manner.
【００３２】次いで、装置１５の操作により鋳鍋１を圧
力源１３に接続する。その結果、鋳鉄の自由面に作用す
る圧力により、鋳鉄が管１２内を上昇して鋳型の鋳込み
口２８と通路３０Ａ及び３０Ｂと空洞３１とを満たす。
前記圧力は製造すべき製品の大きさ及び形状に応じて決
定した所定の時間にわたって維持する。その間、鋳込み
口２８は、鋳縮みを補正するための補足用液状鋳鉄を空
洞に供給するリザーバ又は湯口（ｍａｓｓｅｌｏｔｔｅ
）の役割を果たす。次いで、堰及び中間通路が凝固した
ら装置１５の操作によって鋳鍋１内のガス圧を大気圧に
戻し、鋳込み口２８内及び管１２内の液状鋳鉄をこれら
２つの管路から流出させて鋳鍋１内に戻す。Next, the casting pot 1 is connected to the pressure source 13 by operating the device 15 . As a result, the pressure acting on the free surface of the cast iron causes the cast iron to rise within the tube 12 and fill the spout 28, passages 30A and 30B and cavity 31 of the mold. The pressure is maintained for a predetermined period of time determined depending on the size and shape of the product to be manufactured. Meanwhile, the pour spout 28 serves as a reservoir or sprue that supplies supplemental liquid cast iron into the cavity to compensate for shrinkage.
). Next, when the weir and the intermediate passage are solidified, the gas pressure in the casting pot 1 is returned to atmospheric pressure by operating the device 15, and the liquid cast iron in the pouring port 28 and the pipe 12 is flowed out from these two pipes to form the casting pot. Return to within 1.
【００３３】次いでジャッキ２１の作用を除いて、鋳型
−支持プレートアセンブリ２６がばね２５の作用でノズ
ル６から離れるようにし、フレーム３全体をレール１９
上での滑動により鋳鍋１から水平に移動させる。The action of the jack 21 is then removed, the mold-support plate assembly 26 is moved away from the nozzle 6 by the action of the spring 25, and the entire frame 3 is moved onto the rail 19.
It is moved horizontally from the casting pot 1 by sliding on the top.
【００３４】通路３０Ａ及び３０Ｂが前述の大きさを有
し且つ管１４を介して適当な流量のガスが導入されるた
め、液体金属は鋳込み口２８内を高速で上昇し、各段の
通路に金属静圧（Ｐｒｅｓｓｉｏｎ ｍｅｔａｌｌｏ
ｓｔａｔｉｑｕｅ）が樹立され、各段の２つの空洞に一
対の対応通路３０Ａ及び３０Ｂを介して液体金属が供給
される。このような構造では総ての空洞がその形状に関
係なく同時に充填される。また、中間通路が細いために
その中を流れる金属の流量が制限され、従って充填が各
段の各空洞毎により十分な制御下でより静かに且つ再現
性をもって行われると共に、各鋳込み操作時の金属の移
動が最小限に抑えられる。これは、前述のような堰の寸
法に起因してこれらの堰の入口で液体金属に対する圧力
が緩むため更に促進される。これはまた、鋳造製品の品
質の改善にもつながる。Since the passages 30A and 30B have the aforementioned dimensions and a suitable flow rate of gas is introduced through the pipe 14, the liquid metal rises at high speed in the casting spout 28 and flows into the passages at each stage. Pressure metallo
statique) is established and the two cavities of each stage are supplied with liquid metal via a pair of corresponding passages 30A and 30B. In such a structure, all cavities are filled simultaneously, regardless of their shape. Additionally, the narrow intermediate passages limit the flow rate of metal flowing through them, thus allowing filling to occur more quietly and reproducibly in each cavity of each stage and with better control during each casting operation. Metal migration is minimized. This is further facilitated by the pressure relief on the liquid metal at the inlet of these weirs due to the dimensions of the weirs as described above. This also leads to improved quality of cast products.
【００３５】一変形例として、金属の圧力緩和効果は、
中間通路の横断面積を上流から下流に向けて漸増させる
ことにより促進させてもよい。As a variation, the pressure relief effect of metal is
This may be facilitated by gradually increasing the cross-sectional area of the intermediate passageway from upstream to downstream.
【００３６】また、中間通路が閉塞手段として使用され
るため、金属の収率低下を伴わずに、著しく冷却された
金属の鋳鍋内への返送が回避される。これは、鋳造条件
の再現性にとって極めて有利なことである。また、鋳込
み口内のやや冷却した金属は、次の鋳込み操作時に鋳型
の総ての空洞の間で分配されることになる。Furthermore, since the intermediate passage is used as a closing means, the return of extremely cooled metal into the casting pot is avoided without reducing the metal yield. This is extremely advantageous for the reproducibility of casting conditions. Also, the slightly cooled metal in the pouring spout will be distributed among all cavities of the mold during the next pouring operation.
【図１】本発明の鋳造装置を簡単に示す縦断面図である
。FIG. 1 is a longitudinal sectional view simply showing a casting apparatus of the present invention.
【図２】図１の装置で使用される鋳型を図３の線ＩＩ−
ＩＩに沿った縦断面図で示す説明図である。FIG. 2 shows the mold used in the apparatus of FIG. 1 along line II-- of FIG.
FIG. 2 is an explanatory diagram shown in a longitudinal cross-sectional view along II.
【図３】図２の線ＩＩＩ−ＩＩＩに沿った横断面図であ
る。3 is a cross-sectional view along the line III-III of FIG. 2; FIG.
４ 鋳型（砂型） ２８ 鋳込み口 ３０Ａ、３０Ｂ 中間通路 ３１ 空洞 ３２Ａ、３２Ｂ 堰 4 Mold (sand mold) 28 Casting port 30A, 30B Middle passage 31 Cavity 32A, 32B Weir
Claims (10)
圧下で液体金属を供給する方法であって、この供給を鋳
込み口と、各段毎に前記鋳込み口から延びる少なくとも
１つの中間通路と、この通路を各空洞に接続する堰とを
介して実施し、液体金属の流量を各段毎に中間通路の入
口で絞ることを特徴とする方法。1. A method for supplying liquid metal under low pressure into a cavity of a multi-stage sand mold open on one side, the supply being connected to a casting spout and at least one intermediate passage extending from the spout for each stage. and a weir connecting this passage to each cavity, the flow rate of the liquid metal being throttled at each stage at the entrance of the intermediate passage.
対する圧力が緩和されるようにすることを特徴とする請
求項１に記載の方法。2. A method as claimed in claim 1, characterized in that the pressure on the liquid metal is relieved after it enters the intermediate passage.
力が緩和されるようにすることを特徴とする請求項２に
記載の方法。3. A method according to claim 2, characterized in that the pressure on the liquid metal is relieved as it enters the weir.
せるのに適した流量で導入管に送給することを特徴とす
る請求項１から３のいずれか一項に記載の方法。4. A method as claimed in claim 1, characterized in that the liquid metal is fed into the inlet pipe at a flow rate suitable to rise above all intermediate passages.
まで維持し、その後この圧力を緩めることを特徴とする
請求項１から４のいずれか一項に記載の方法。5. A method according to claim 1, characterized in that the mold supply pressure is maintained until all intermediate passages have solidified, and then this pressure is relieved.
法を実施するための片側だけ開放された砂型であって、
１つの鋳込み口と少なくとも２つの段とを含み、各段毎
に少なくとも１つの空洞が具備されており、この空洞へ
の供給が少なくとも１つの中間通路によって鋳込み口に
接続された複数の堰を介して行われるようになっており
、各段の中間通路の入口の横断面積の合計が鋳込み口の
横断面積より遥かに小さいことを特徴とする片側だけ開
放された砂型。6. A sand mold with only one side open for carrying out the method according to any one of claims 1 to 5, comprising:
a spout and at least two stages, each stage having at least one cavity, the supply of which is via a plurality of weirs connected to the spout by at least one intermediate passage; A sand mold with only one side open, characterized in that the sum of the cross-sectional areas of the entrances of the intermediate passages of each stage is much smaller than the cross-sectional area of the pouring port.
堰の横断面積の合計が少なくともその通路の入口の横断
面積と同じであることを特徴とする請求項６に記載の砂
型。7. Sand mold according to claim 6, characterized in that the sum of the cross-sectional areas of a plurality of weirs fed through the same passage is at least equal to the cross-sectional area of the entrance of the passage.
少なくとも２つの中間通路を介して行われるようになっ
ている請求項６又は７に記載の砂型。8. A sand mold according to claim 6, wherein each cavity is supplied via at least two intermediate passages extending on either side of the casting spout.
鋳込み口の横断面積の１０％以下であることを特徴とす
る請求項６から８のいずれか一項に記載の砂型。9. The sand mold according to claim 6, wherein the total cross-sectional area of the entrances of the intermediate passages in each stage is 10% or less of the cross-sectional area of the pouring port.
低圧鋳造を行うための装置であって、鋳鍋と、該鋳鍋か
ら上方に延びて上向きの開口を有する導入管と、前記鋳
鍋に接続された加圧ガス源と、下向きの開口を有する鋳
込み口の他に少なくとも２つの段を含み、各段に少なく
とも１つの空洞が具備されており、少なくとも１つの中
間通路により前記鋳込み口に接続された複数の堰を介し
て前記空洞への供給が行われるようになっている少なく
とも１つの片側だけ開放された砂型と、鋳込み口の底部
を前記導入管の開口に当接させる手段とを含み、砂型が
請求項６から９のいずれか一項に記載の砂型であること
を特徴とする装置。10. An apparatus for low-pressure casting of metal in a multistage sand mold with only one side open, comprising: a casting pot; an introduction pipe extending upward from the casting pot and having an upward opening; a source of pressurized gas connected to the pan, and a spout having a downwardly directed opening, including at least two stages, each stage being provided with at least one cavity, and at least one intermediate passage connecting said spout. a sand mold with at least one side open, the sand mold being adapted to be supplied to the cavity via a plurality of weirs connected to the mold, and means for bringing the bottom of the casting spout into contact with the opening of the introduction pipe. 10. An apparatus characterized in that the sand mold is a sand mold according to any one of claims 6 to 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9007860A FR2663570B1 (en) | 1990-06-22 | 1990-06-22 | PROCESS, MOLD AND PLANT FOR LOW-PRESSURE MULTI-STAGE METAL CASTING. |
| FR9007860 | 1990-06-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04231143A true JPH04231143A (en) | 1992-08-20 |
| JPH07112593B2 JPH07112593B2 (en) | 1995-12-06 |
Family
ID=9397915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3150561A Expired - Lifetime JPH07112593B2 (en) | 1990-06-22 | 1991-06-21 | Method, mold and apparatus for low pressure multi-stage casting of metal |
Country Status (16)
| Country | Link |
|---|---|
| EP (1) | EP0463911B1 (en) |
| JP (1) | JPH07112593B2 (en) |
| AT (1) | ATE120113T1 (en) |
| BR (1) | BR9102619A (en) |
| CA (1) | CA2044879C (en) |
| CS (1) | CS188191A3 (en) |
| DE (1) | DE69108306T2 (en) |
| DK (1) | DK0463911T3 (en) |
| ES (1) | ES2071941T3 (en) |
| FI (1) | FI96097C (en) |
| FR (1) | FR2663570B1 (en) |
| HU (1) | HU206845B (en) |
| MX (1) | MX173409B (en) |
| NO (1) | NO178367C (en) |
| PL (1) | PL168033B1 (en) |
| RU (1) | RU2046034C1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016016439A (en) * | 2014-07-10 | 2016-02-01 | 大同特殊鋼株式会社 | Vacuum suction casting method |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MY138164A (en) | 2005-03-15 | 2009-04-30 | Univ Malaya | Glycolipids of branched chain alkyl oligosaccharides for liquid crystal and related applications |
| CN108080588B (en) * | 2018-01-22 | 2021-03-16 | 铜陵求精机械有限公司 | Slag casting die of slag casting machine |
| CN109317620A (en) * | 2018-11-30 | 2019-02-12 | 马鞍山市华威冶金机械有限公司 | A kind of mold and its casting method of batch casting Bitruder barrel liner |
| RU207520U1 (en) * | 2021-07-08 | 2021-11-01 | Акционерное общество «Научно-производственная корпорация «Уралвагонзавод» имени Ф.Э. Дзержинского» | DEVICE FOR CONTROLLING LOW PRESSURE METAL INTO A FORM |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3656539A (en) * | 1969-01-29 | 1972-04-18 | Amsted Ind Inc | Apparatus for casting molten metal |
| FR2295808A1 (en) * | 1974-12-24 | 1976-07-23 | Pont A Mousson | LOW PRESSURE CASTING PROCESS AND PLANT IN SAND MOLD |
| US4112997A (en) * | 1977-02-28 | 1978-09-12 | Hitchiner Manufacturing Co., Inc. | Metal casting |
-
1990
- 1990-06-22 FR FR9007860A patent/FR2663570B1/en not_active Expired - Lifetime
-
1991
- 1991-06-11 AT AT91401544T patent/ATE120113T1/en not_active IP Right Cessation
- 1991-06-11 DE DE69108306T patent/DE69108306T2/en not_active Expired - Fee Related
- 1991-06-11 ES ES91401544T patent/ES2071941T3/en not_active Expired - Lifetime
- 1991-06-11 EP EP91401544A patent/EP0463911B1/en not_active Expired - Lifetime
- 1991-06-11 DK DK91401544.1T patent/DK0463911T3/en active
- 1991-06-18 CA CA002044879A patent/CA2044879C/en not_active Expired - Fee Related
- 1991-06-19 CS CS911881A patent/CS188191A3/en unknown
- 1991-06-19 FI FI913009A patent/FI96097C/en not_active IP Right Cessation
- 1991-06-20 RU SU914895651A patent/RU2046034C1/en active
- 1991-06-20 NO NO912403A patent/NO178367C/en unknown
- 1991-06-20 PL PL91290755A patent/PL168033B1/en unknown
- 1991-06-21 HU HU912080A patent/HU206845B/en not_active IP Right Cessation
- 1991-06-21 JP JP3150561A patent/JPH07112593B2/en not_active Expired - Lifetime
- 1991-06-21 BR BR919102619A patent/BR9102619A/en not_active IP Right Cessation
- 1991-06-21 MX MX026349A patent/MX173409B/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016016439A (en) * | 2014-07-10 | 2016-02-01 | 大同特殊鋼株式会社 | Vacuum suction casting method |
Also Published As
| Publication number | Publication date |
|---|---|
| HU912080D0 (en) | 1991-12-30 |
| NO178367B (en) | 1995-12-04 |
| DE69108306D1 (en) | 1995-04-27 |
| FR2663570A1 (en) | 1991-12-27 |
| CA2044879C (en) | 1996-02-06 |
| NO912403L (en) | 1991-12-23 |
| DK0463911T3 (en) | 1995-08-14 |
| BR9102619A (en) | 1992-01-21 |
| PL168033B1 (en) | 1995-12-30 |
| PL290755A1 (en) | 1992-02-24 |
| ES2071941T3 (en) | 1995-07-01 |
| EP0463911B1 (en) | 1995-03-22 |
| CS188191A3 (en) | 1992-06-17 |
| HUT59045A (en) | 1992-04-28 |
| CA2044879A1 (en) | 1991-12-23 |
| RU2046034C1 (en) | 1995-10-20 |
| FI913009A0 (en) | 1991-06-19 |
| ATE120113T1 (en) | 1995-04-15 |
| NO178367C (en) | 1996-03-13 |
| FI913009A (en) | 1991-12-23 |
| MX173409B (en) | 1994-03-01 |
| EP0463911A1 (en) | 1992-01-02 |
| HU206845B (en) | 1993-01-28 |
| FI96097B (en) | 1996-01-31 |
| FI96097C (en) | 1996-05-10 |
| DE69108306T2 (en) | 1995-08-03 |
| FR2663570B1 (en) | 1992-09-18 |
| JPH07112593B2 (en) | 1995-12-06 |
| NO912403D0 (en) | 1991-06-20 |
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