JPH0924454A - Casting device - Google Patents
Casting deviceInfo
- Publication number
- JPH0924454A JPH0924454A JP17474595A JP17474595A JPH0924454A JP H0924454 A JPH0924454 A JP H0924454A JP 17474595 A JP17474595 A JP 17474595A JP 17474595 A JP17474595 A JP 17474595A JP H0924454 A JPH0924454 A JP H0924454A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- cavity
- cylinder sleeve
- plunger
- flow path
- 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.)
- Pending
Links
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はキャビティ内を真空
とした状態で鋳造する、所謂真空ダイカストに用いられ
る鋳造装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting device used for so-called vacuum die casting, in which a cavity is cast in a vacuum state.
【０００２】[0002]
【従来の技術】溶湯をキャビティに射出充填する際に、
スリーブ内及びキャビティ内に存在していたガスが鋳物
中に巻き込まれ、巣となって鋳物の性能を悪化させる場
合がある。またキャビティ内に残留したガスの背圧によ
り湯まわり性が悪化し、鋳物の形状不良となる場合もあ
る。そこで従来より、キャビティ内を真空（減圧）とし
て上記不具合を回避する真空ダイカストが行われてい
る。2. Description of the Related Art When injecting and filling molten metal into a cavity,
The gas existing in the sleeve and the cavity may be entrained in the casting to form a cavity and deteriorate the performance of the casting. In addition, the back pressure of the gas remaining in the cavity may deteriorate the melt flowability, resulting in a defective shape of the casting. Therefore, conventionally, vacuum die casting has been performed in which the inside of the cavity is evacuated (decompressed) to avoid the above problems.
【０００３】真空ダイカスト用の鋳造装置としては、例
えば図５に示すような構造のものが知られている。この
鋳造装置は、キャビティ１００をもつ鋳型１０１と、キ
ャビティ１００と連通して鋳型１０１に固定されたシリ
ンダスリーブ１０２と、シリンダスリーブ１０２内を進
退摺動するプランジャ１０３とからなり、鋳型１０１に
はキャビティ１００と連通する真空引きベント１０４が
設けられ、シリンダスリーブ１０２には溶湯の注湯孔１
０５が設けられている。As a casting apparatus for vacuum die casting, one having a structure as shown in FIG. 5, for example, is known. This casting apparatus comprises a mold 101 having a cavity 100, a cylinder sleeve 102 fixed to the mold 101 in communication with the cavity 100, and a plunger 103 that slides back and forth in the cylinder sleeve 102. A vacuum suction vent 104 communicating with 100 is provided, and the molten metal pouring hole 1 is provided in the cylinder sleeve 102.
05 is provided.
【０００４】この鋳造装置では、プランジャ１０３の後
退位置で注湯孔１０５が開口され、注湯孔１０５から所
定量の溶湯がシリンダスリーブ１０２内に注湯される。
そしてプランジャ１０３が前進してシリンダスリーブ１
０２内の溶湯をキャビティ１００内に低速射出し次いで
高速射出するとともに、射出時には真空引きベント１０
４から真空圧がキャビティ１００に導入され、キャビテ
ィ１００内を真空に保持しつつ溶湯を鋳込み、溶湯の凝
固を待って型開き後鋳物が取り出される。In this casting apparatus, the pouring hole 105 is opened at the retracted position of the plunger 103, and a predetermined amount of molten metal is poured into the cylinder sleeve 102 from the pouring hole 105.
Then, the plunger 103 advances to move the cylinder sleeve 1
The molten metal in 02 is injected into the cavity 100 at a low speed and then at a high speed.
A vacuum pressure is introduced from 4 into the cavity 100, the molten metal is cast while the inside of the cavity 100 is maintained in a vacuum, the solidification of the molten metal is waited, and the casting is taken out after the mold opening.
【０００５】ところが上記鋳造装置では、シリンダスリ
ーブ１０２内に注湯された溶湯がプランジャ１０３の前
進駆動前にキャビティ１００内に噴出する現象（図５の
Ａ）が見られた。このような現象が起きると、湯境いの
形成により鋳物の外観品質が損なわれ、また鋳物中に無
数のブローホールが点在して気密性が悪化するという不
具合がある。However, in the above casting apparatus, a phenomenon was observed in which the molten metal poured into the cylinder sleeve 102 was ejected into the cavity 100 before the plunger 103 was driven forward (A in FIG. 5). When such a phenomenon occurs, the appearance quality of the casting is deteriorated due to the formation of a molten metal boundary, and there are disadvantages that numerous air blowholes are scattered in the casting and the airtightness is deteriorated.
【０００６】そこで例えば特開平１−３１３１７０号公
報には、プランジャ１０３とシリンダスリーブ１０２と
の間隙に図示しない気密シール部材を配置した真空ダイ
カスト装置が開示されている。この装置によれば、気密
シール部材によりプランジャ１０３とシリンダスリーブ
１０２との間隙がシールされるため、プランジャ１０３
後方からの常圧の空気が流入し体積膨張しながら溶湯を
巻き込んでキャビティ１００内に噴出するのを防止する
ことができる。Therefore, for example, Japanese Unexamined Patent Publication No. 1-313170 discloses a vacuum die casting apparatus in which an airtight seal member (not shown) is arranged in the gap between the plunger 103 and the cylinder sleeve 102. According to this device, since the gap between the plunger 103 and the cylinder sleeve 102 is sealed by the airtight sealing member, the plunger 103
It is possible to prevent normal-pressure air from the rear from flowing in and entraining the molten metal while ejecting into the cavity 100 while expanding in volume.
【０００７】[0007]
【発明が解決しようとする課題】ところが上記公報に開
示された鋳造装置では、空気の流入による上記不具合は
解決されるものの、プランジャ１０３による射出前の真
空吸引時にシリンダスリーブ１０２内の溶湯がキャビテ
ィ１００内に吸引され、プランジャ１０３による射出時
の湯流れ性や凝固速度が乱れて外観品質が低下するとい
う不具合は依然として残っていた。However, in the casting apparatus disclosed in the above publication, although the above-mentioned problems due to the inflow of air are solved, the molten metal in the cylinder sleeve 102 is evacuated by the plunger 103 during vacuum suction before injection. There was still a problem that the appearance quality was deteriorated because the flowability of the molten metal and the solidification rate during the injection by the plunger 103 were disturbed.
【０００８】本発明はこのような事情に鑑みてなされた
ものであり、真空源からの負圧によりシリンダスリーブ
内に溶湯を所定量計量して配置するとともに、プランジ
ャの駆動による溶湯の射出以前にはキャビティ内への溶
湯の流入を阻止することにより、上記不具合を解決する
ことを目的とする。The present invention has been made in view of such circumstances, and a predetermined amount of molten metal is measured and arranged in the cylinder sleeve by a negative pressure from a vacuum source, and before the molten metal is injected by driving a plunger. The object of the present invention is to solve the above-mentioned inconvenience by preventing the molten metal from flowing into the cavity.
【０００９】[0009]
【課題を解決するための手段】上記課題を解決する本発
明の鋳造装置の特徴は、鋳型と、鋳型のキャビティと連
結された真空源と、鋳型の外部に設けられた溶湯保持部
と、キャビティに連通し内部をプランジャが進退摺動さ
れるシリンダスリーブと、シリンダスリーブに開口し溶
湯保持部とシリンダスリーブとを連通する溶湯供給路
と、よりなり、真空源によりキャビティを真空にした状
態で溶湯保持部から溶湯供給路を介してシリンダスリー
ブに溶湯を供給しプランジャを進出駆動することでキャ
ビティに溶湯を充填して鋳造する鋳造装置において、溶
湯供給路の開口とキャビティの間の溶湯流路内に出入自
在に設けられ、一端に溶湯検出センサをもつとともに溶
湯流路内で溶湯を堰き止め可能な湯量計量部材を備え、
真空源からの負圧により開口から溶湯流路に流入した溶
湯を溶湯流路に進入した湯量計量部材で堰き止め溶湯検
出センサの検出信号によりプランジャが駆動されて開口
を塞ぐことで溶湯流路に所定量の溶湯を給湯し、次いで
湯量計量部材が溶湯流路から退出することで溶湯流路内
に蓄えられた溶湯をプランジャでキャビティ内に充填可
能としたことにある。The features of the casting apparatus of the present invention for solving the above-mentioned problems are that a mold, a vacuum source connected to the mold cavity, a molten metal holding portion provided outside the mold, and a cavity. A cylinder sleeve in which the plunger is slid forward and backward through the inside of the cylinder sleeve, and a molten metal supply path that opens into the cylinder sleeve and communicates the molten metal holding portion with the cylinder sleeve. In a casting device that fills a cavity with molten metal by supplying molten metal from a holding part to a cylinder sleeve through a molten metal supply path and driving a plunger to advance, the molten metal flow path between the opening of the molten metal supply path and the cavity Is equipped with a molten metal detection sensor at one end and is equipped with a molten metal amount measuring member capable of blocking the molten metal in the molten metal flow path,
The molten metal that has flowed into the molten metal flow path from the opening due to the negative pressure from the vacuum source is blocked by the amount measuring member that has entered the molten metal flow path, and the plunger is driven by the detection signal of the molten metal detection sensor to close the opening to the molten metal flow path. A predetermined amount of molten metal is supplied, and then the molten metal amount measuring member is withdrawn from the molten metal flow passage so that the molten metal stored in the molten metal flow passage can be filled in the cavity by the plunger.
【００１０】[0010]
【発明の実施の形態】本発明の鋳造装置では、先ずプラ
ンジャの後退位置で溶湯供給路の開口が開かれた状態に
て、真空源により真空圧力（負圧）がキャビティに導入
される。この真空圧力はキャビティからシリンダスリー
ブ、開口及び溶湯供給路を介して溶湯保持部に導入さ
れ、溶湯保持部に蓄えられた溶湯が溶湯供給路よりシリ
ンダスリーブ内に流入する。BEST MODE FOR CARRYING OUT THE INVENTION In the casting apparatus of the present invention, first, a vacuum pressure (negative pressure) is introduced into the cavity by a vacuum source with the opening of the molten metal supply passage being opened at the retracted position of the plunger. This vacuum pressure is introduced into the molten metal holding portion from the cavity through the cylinder sleeve, the opening and the molten metal supply passage, and the molten metal stored in the molten metal holding portion flows into the cylinder sleeve from the molten metal supply passage.
【００１１】この時、同時に湯量計量部材が進出駆動さ
れ、溶湯供給路の開口より前方の溶湯流と内に所定高さ
で突出している。したがってシリンダスリーブ内に流入
した溶湯は、湯量計量部材に当接して堰き止められ、そ
れ以上奥方へは進入できず溶湯流路内に貯留される。そ
して湯量計量部材に設けられた溶湯検出センサの高さま
で溶湯が貯留されると、溶湯検出センサの検出信号によ
りプランジャが前進駆動されて溶湯供給路の開口を塞
ぐ。これによりさらなる溶湯の貯留が規制され、プラン
ジャ先端から湯量計量部材の間の溶湯流路内に所定量の
溶湯が給湯されたこととなる。At this time, at the same time, the molten metal amount measuring member is driven to advance, and projects at a predetermined height into the molten metal flow in front of the opening of the molten metal supply passage. Therefore, the molten metal that has flowed into the cylinder sleeve comes into contact with the molten metal amount measuring member and is dammed up, and cannot be further recessed, and is stored in the molten metal flow path. When the molten metal is stored up to the height of the molten metal detection sensor provided in the molten metal amount measuring member, the plunger is driven forward by the detection signal of the molten metal detection sensor to close the opening of the molten metal supply passage. As a result, further storage of molten metal is regulated, and a predetermined amount of molten metal is supplied into the molten metal flow path between the tip of the plunger and the molten metal amount measuring member.
【００１２】なお、プランジャが開口を塞ぐまでの移動
距離に応じた溶湯の分だけ貯留された溶湯の高さが増大
するので、溶湯計量部材の溶湯流路内への突出高さは溶
湯検出センサの高さよりその増大する分を見込んで高く
しておくことが望ましい。次に湯量計量部材が退出駆動
され溶湯流路から退出して溶湯の流動が可能とされる
と、プランジャがさらに前進駆動され、溶湯は真空下で
キャビティ内に充填されて鋳造が行われる。つまりプラ
ンジャの駆動による溶湯のキャビティへの射出以前に
は、湯量計量部材による堰き止めによりキャビティ内へ
の溶湯の流入が確実に阻止されている。Since the height of the stored molten metal is increased by the amount of the molten metal corresponding to the moving distance until the plunger closes the opening, the protruding height of the molten metal measuring member into the molten metal flow passage is the molten metal detection sensor. It is desirable to keep the height higher than the height of the height in consideration of the increase. Next, when the molten metal quantity measuring member is driven to move out and moves out of the molten metal flow path to allow the molten metal to flow, the plunger is driven further forward, the molten metal is filled in the cavity under vacuum, and casting is performed. That is, before the molten metal is injected into the cavity by driving the plunger, the inflow of the molten metal into the cavity is reliably prevented by the damming by the molten metal amount measuring member.
【００１３】溶湯がキャビティ内を充填後の適当な時期
にキャビティ内は大気圧に戻され、キャビティを充填し
た溶湯が凝固した後、型開きにより鋳物が取り出されて
鋳造の一サイクルが終了する。真空源とキャビティの間
は、常時連通状態でもよいが電磁弁などを用いて開閉可
能とすることが望ましい。このようにすればキャビティ
と真空源の間に溶湯が侵入するのを確実に防止でき、後
加工を不要とすることができる。At a suitable time after the molten metal has been filled in the cavity, the inside of the cavity is returned to the atmospheric pressure, and after the molten metal filling the cavity is solidified, the casting is taken out by opening the mold and one cycle of casting is completed. The vacuum source and the cavity may be in continuous communication with each other, but it is desirable that they can be opened and closed by using a solenoid valve or the like. By doing so, it is possible to reliably prevent the molten metal from entering between the cavity and the vacuum source, and it is possible to eliminate the need for post-processing.
【００１４】溶湯流路とは、シリンダスリーブを含んで
シリンダスリーブとキャビティの間のランナなどの溶湯
が流れる部分をいう。湯量計量部材はシリンダスリーブ
内に出入自在に設けるのが好ましいが、場合によっては
鋳型に設けることも可能である。湯量計量部材の形状
は、溶湯流路の断面形状と同一形状とすることで溶湯の
堰き止めが可能となるが、溶湯流路内に進入してから変
形して溶湯流路の断面形状と同一となるように構成する
こともできる。また材質としては、溶湯の熱により侵さ
れることがなければどのような材質のものも用いること
ができる。The molten metal flow passage refers to a portion including the cylinder sleeve, such as a runner between the cylinder sleeve and the cavity, through which the molten metal flows. The hot water amount measuring member is preferably provided so as to be able to move in and out of the cylinder sleeve, but in some cases, it can be provided in the mold. It is possible to block the molten metal by making the shape of the molten metal measuring member the same as the sectional shape of the molten metal flow path, but it is the same as the sectional shape of the molten metal flow path as it deforms after entering the molten metal flow path. Can also be configured to be As the material, any material can be used as long as it is not attacked by the heat of the molten metal.
【００１５】[0015]
【実施例】以下、実施例によりさらに具体的に説明す
る。図１に本実施例の鋳造装置を示す。この鋳造装置
は、鋳型１と、鋳型１のキャビティ１０と電磁弁２０を
介して連結された真空ポンプ２と、鋳型１の外部に設け
られた溶湯保持部３と、キャビティ１０に連結され内部
をプランジャ４０が進退摺動されるシリンダスリーブ４
と、シリンダスリーブ４に開口する開口５０をもち溶湯
保持部３とシリンダスリーブ４を連通する溶湯供給路５
と、シリンダスリーブ４内に出入自在に設けられ先端に
溶湯検出センサ６０をもつ湯量計量部材６と、から構成
されている。EXAMPLES The present invention will be described in more detail below with reference to examples. FIG. 1 shows the casting apparatus of this embodiment. This casting apparatus includes a mold 1, a vacuum pump 2 connected to the cavity 10 of the mold 1 via a solenoid valve 20, a molten metal holding portion 3 provided outside the mold 1, and a cavity 10 connected to the cavity 10. Cylinder sleeve 4 on which plunger 40 slides forward and backward
And a molten metal supply path 5 that has an opening 50 that opens to the cylinder sleeve 4 and connects the molten metal holding portion 3 and the cylinder sleeve 4 to each other.
And a hot water amount measuring member 6 which is provided in and out of the cylinder sleeve 4 and has a molten metal detection sensor 60 at its tip.
【００１６】鋳型１は、シリンダスリーブ４が固定され
た第１型１１と、第１型１１と型閉めされる第２型１２
とからなり、第１型１１と第２型１２の間にキャビティ
１０及び真空ベント１３が形成されている。真空ポンプ
２は、電磁弁２０を介して真空ベント１３からキャビテ
ィ１０内に負圧を供給可能に配置されている。The mold 1 includes a first mold 11 to which a cylinder sleeve 4 is fixed, and a second mold 12 to be closed with the first mold 11.
The cavity 10 and the vacuum vent 13 are formed between the first mold 11 and the second mold 12. The vacuum pump 2 is arranged so as to be able to supply a negative pressure from the vacuum vent 13 into the cavity 10 via the electromagnetic valve 20.
【００１７】溶湯保持部３はシリンダスリーブ４の下方
に配置され、溶湯供給路５によりシリンダスリーブ４と
連通されている。溶湯供給路５の開口５０は、図１に示
すプランジャ４０の後退位置でプランジャ４０の先端よ
り前方に位置している。なおプランジャ４０は図示しな
い油圧シリンダ装置によりシリンダスリーブ４内を進退
自在に摺動するように構成されている。The molten metal holding portion 3 is arranged below the cylinder sleeve 4, and is connected to the cylinder sleeve 4 by a molten metal supply passage 5. The opening 50 of the molten metal supply passage 5 is located in front of the tip of the plunger 40 at the retracted position of the plunger 40 shown in FIG. The plunger 40 is configured to slide forward and backward in the cylinder sleeve 4 by a hydraulic cylinder device (not shown).
【００１８】湯量計量部材６は、溶湯供給路５の開口５
０より所定距離前方に配置され、図示しない油圧シリン
ダ装置によりシリンダスリーブ４内に出入自在に構成さ
れている。そしてシリンダスリーブ４に進入した状態で
は、湯量計量部材６はシリンダスリーブ４の内周表面に
密接され、湯量計量部材６の先端より下方で溶湯をシリ
ンダスリーブ４内に堰き止め可能に構成されている。ま
た湯量計量部材６の先端面よりやや下方には溶湯検出セ
ンサ６０が設けられ、堰き止められた溶湯の液面が溶湯
検出センサ６０の位置に到達したかどうかを検出する。The molten metal quantity measuring member 6 is provided with an opening 5 of the molten metal supply passage 5.
It is arranged a predetermined distance in front of 0 and is configured to be able to move in and out of the cylinder sleeve 4 by a hydraulic cylinder device (not shown). In the state where it has entered the cylinder sleeve 4, the hot water amount measuring member 6 is in close contact with the inner peripheral surface of the cylinder sleeve 4, and the molten metal can be blocked in the cylinder sleeve 4 below the tip of the hot water amount measuring member 6. . Further, a molten metal detection sensor 60 is provided slightly below the front end surface of the molten metal amount measuring member 6 to detect whether or not the level of the blocked molten metal has reached the position of the molten metal detection sensor 60.
【００１９】溶湯検出センサ６０の検出信号は図示しな
い制御装置に送られ、制御装置はその信号に応じてプラ
ンジャ４０及び湯量計量部材６の駆動を制御する。さ
て、上記のように構成された本実施例の鋳造装置によっ
て鋳造を行う方法について以下に説明する。先ず図１に
示す初期状態において、プランジャ４０は後退位置にあ
り溶湯供給路５の開口５０はプランジャ４０の前方にあ
る。その状態で電磁弁２０を開とし真空ポンプ２を駆動
するとともに、湯量計量部材６を図１の矢印ａ方向に駆
動し所定高さだけシリンダスリーブ４内に進出させる。A detection signal of the molten metal detection sensor 60 is sent to a control device (not shown), and the control device controls the driving of the plunger 40 and the molten metal quantity measuring member 6 in accordance with the signal. Now, a method of casting with the casting apparatus of the present embodiment configured as described above will be described below. First, in the initial state shown in FIG. 1, the plunger 40 is in the retracted position and the opening 50 of the molten metal supply passage 5 is in front of the plunger 40. In this state, the solenoid valve 20 is opened to drive the vacuum pump 2, and the hot water amount measuring member 6 is driven in the direction of arrow a in FIG. 1 to advance into the cylinder sleeve 4 by a predetermined height.
【００２０】するとキャビティ１０、シリンダスリーブ
４及び溶湯保持部３内の空気は真空ベント１３から電磁
弁２０を介して図１の矢印ｂ方向に抜かれ、溶湯保持部
３内の溶湯３０は負圧により溶湯供給路５を介してシリ
ンダスリーブ４内に流入する。このとき図２に示すよう
に、湯量計量部材６がシリンダスリーブ４内に突出して
いるため、溶湯３０は湯量計量部材６で堰き止められ、
プランジャ４０先端と湯量計量部材６の間に貯留され
る。Then, the air in the cavity 10, the cylinder sleeve 4, and the molten metal holding portion 3 is evacuated from the vacuum vent 13 through the electromagnetic valve 20 in the direction of arrow b in FIG. 1, and the molten metal 30 in the molten metal holding portion 3 is negatively pressured. It flows into the cylinder sleeve 4 via the molten metal supply path 5. At this time, as shown in FIG. 2, since the molten metal amount measuring member 6 projects into the cylinder sleeve 4, the molten metal 30 is blocked by the molten metal amount measuring member 6,
It is stored between the tip of the plunger 40 and the hot water amount measuring member 6.
【００２１】そして溶湯３０が所定深さ貯留されて湯面
が溶湯検出センサ６０の位置となると、溶湯検出センサ
６０の検出信号によりプランジャ４０が図３の矢印ｃ方
向へ前進駆動され、先端面が図３のｌ1 からｌ2 の位置
となり、プランジャ４０が溶湯供給路５の開口５０を塞
ぐ。これによりさらなる溶湯の流入が規制される。なお
溶湯検出センサ６０は高さｈ1 の位置にあり、湯量計量
部材６の先端面は高さｈ2 の位置にある（ｈ2 ＞
ｈ1 ）。そしてシリンダスリーブ４内における溶湯の高
さｈ1 〜ｈ2 の部分の体積は、長さｌ1 〜ｌ2 の部分の
溶湯の体積より僅かに大きくされ、プランジャ４０の前
進による湯面の上昇によっても溶湯が湯量計量部材６を
超えて溢れ出ないように構成されている。そして、その
状態で貯留されている溶湯３０の体積は、鋳造時にキャ
ビティ１０とランナの合計容積に相当している。When the molten metal 30 is stored at a predetermined depth and the molten metal surface reaches the position of the molten metal detection sensor 60, the detection signal of the molten metal detection sensor 60 drives the plunger 40 forward in the direction of arrow c in FIG. The position is from l 1 to l 2 in FIG. 3, and the plunger 40 closes the opening 50 of the molten metal supply passage 5. This further restricts the inflow of molten metal. The molten metal detection sensor 60 is located at a height h 1 , and the tip end surface of the molten metal amount measuring member 6 is located at a height h 2 (h 2 >).
h 1 ). The volume of the molten metal at the heights h 1 to h 2 inside the cylinder sleeve 4 is made slightly larger than the volume of the molten metal at the lengths l 1 to l 2 , and the forward movement of the plunger 40 raises the molten metal surface. Is configured so that the molten metal does not overflow the molten metal amount measuring member 6. The volume of the molten metal 30 stored in that state corresponds to the total volume of the cavity 10 and the runner during casting.
【００２２】次に湯量計量部材６が図４の矢印ｄ方向に
下降駆動され、シリンダスリーブ４内から退出する。こ
れにより溶湯３０の流動が可能となるとともにプランジ
ャ４０の前進が可能となり、プランジャ４０のｃ方向へ
のさらなる駆動により溶湯３０はキャビティ１０内に射
出充填される。キャビティ１０内への溶湯の充填ととも
に電磁弁２０が閉とされ、溶湯が真空ベント１３から漏
れないように構成されている。またプランジャ４０の前
進により開口５０が大気に連通するため、溶湯保持部３
及び溶湯供給路５内の溶湯は溶湯保持部３内に流下しシ
リンダスリーブ４内に流入することはない。Next, the hot water amount measuring member 6 is driven downward in the direction of arrow d in FIG. 4 and withdraws from the inside of the cylinder sleeve 4. This enables the molten metal 30 to flow and the plunger 40 to move forward, and the molten metal 30 is injected and filled into the cavity 10 by further driving the plunger 40 in the c direction. The solenoid valve 20 is closed when the molten metal is filled in the cavity 10 so that the molten metal does not leak from the vacuum vent 13. Further, since the opening 50 communicates with the atmosphere as the plunger 40 advances, the molten metal holding portion 3
The molten metal in the molten metal supply path 5 does not flow down into the molten metal holding portion 3 and into the cylinder sleeve 4.
【００２３】そしてキャビティ１０内の溶湯が凝固した
後、キャビティ１０は大気と連通され、第１型１１及び
第２型１２を開いて鋳物が取り出される。したがって本
実施例の鋳造装置によれば、溶湯は湯量計量部材６で堰
き止められた状態でシリンダスリーブ４内に給湯される
ので、プランジャ４０による射出以前に溶湯がキャビテ
ィ内に流入することがない。After the molten metal in the cavity 10 is solidified, the cavity 10 is communicated with the atmosphere, the first die 11 and the second die 12 are opened, and the casting is taken out. Therefore, according to the casting apparatus of the present embodiment, the molten metal is supplied to the cylinder sleeve 4 while being blocked by the molten metal amount measuring member 6, so that the molten metal does not flow into the cavity before the injection by the plunger 40. .
【００２４】またシリンダスリーブ４内に外部から空気
が流入したとしても、その空気は湯量計量部材６の上端
面とシリンダスリーブ４内周表面との間の間隙からキャ
ビティ１０を通じて真空ベント１３より排出され、かつ
溶湯は湯量計量部材６の前方には流入しないので、キャ
ビティ１０内へ溶湯が噴出することもない。さらに溶湯
はシリンダスリーブ４内に負圧により給湯されるため、
ラドルなどが不要となるとともに溶湯の酸化が防止さ
れ、またプランジャ４０で溶湯供給路５の開口５０を塞
ぐので湯切り弁も不要となる。Even if air flows into the cylinder sleeve 4 from the outside, the air is discharged from the vacuum vent 13 through the cavity 10 through the gap between the upper end surface of the molten metal measuring member 6 and the inner peripheral surface of the cylinder sleeve 4. Moreover, since the molten metal does not flow in front of the molten metal amount measuring member 6, the molten metal does not spout into the cavity 10. Further, since the molten metal is supplied into the cylinder sleeve 4 by negative pressure,
The need for a ladle and the like is eliminated, the oxidation of the molten metal is prevented, and since the plunger 40 closes the opening 50 of the molten metal supply passage 5, the molten metal shutoff valve is also unnecessary.
【００２５】[0025]
【発明の効果】すなわち本発明の鋳造装置によれば、プ
ランジャの駆動による溶湯のキャビティへの射出以前に
は、湯量計量部材による堰き止めによりキャビティ内へ
の溶湯の流入が確実に阻止されているので、射出時の湯
流れ性や凝固速度が乱れて外観品質が低下するという不
具合を確実に防止することができる。That is, according to the casting apparatus of the present invention, before the molten metal is injected into the cavity by driving the plunger, the molten metal is surely prevented from flowing into the cavity by the damming by the amount measuring member. Therefore, it is possible to reliably prevent the problem that the appearance quality is deteriorated due to the disturbance of the flowability of the molten metal and the solidification rate at the time of injection.
【００２６】またシリンダスリーブの外方から空気がシ
リンダスリーブ内に流入したとしても、その空気は溶湯
を巻き込むことなくキャビティから排出されるので、溶
湯がキャビティ内に噴出するような不具合がない。した
がって特開平１−３１３１７０号公報に開示されている
シール部材などが不要となるので、高負荷の摺動部にシ
ール部材を設けることによる信頼性の確保などの問題の
発生を回避することができる。Further, even if air flows into the cylinder sleeve from the outside of the cylinder sleeve, the air is discharged from the cavity without entraining the molten metal, so that there is no problem that the molten metal is ejected into the cavity. Therefore, the seal member disclosed in Japanese Patent Laid-Open No. 1-313170 becomes unnecessary, so that it is possible to avoid the occurrence of problems such as ensuring reliability due to providing the seal member on the sliding portion under high load. .
【００２７】さらに、溶湯は真空下でシリンダスリーブ
内に給湯されるので、溶湯の酸化が防止されている。そ
して真空圧力によりシリンダスリーブ内に給湯されるた
め、給湯のためのラドルなどの装置が不要となるととも
に、プランジャを湯切り弁として用いているので湯切り
弁も不要となり、装置の構成が簡略化される。Furthermore, since the molten metal is supplied into the cylinder sleeve under vacuum, the molten metal is prevented from being oxidized. And since the hot water is supplied to the cylinder sleeve by the vacuum pressure, a device such as a ladle for hot water supply is unnecessary, and since the plunger is used as a hot water shutoff valve, the hot water shutoff valve is also unnecessary, and the device configuration is simplified. To be done.
【図１】本発明の一実施例の鋳造装置をプランジャの後
退位置で示す概略断面図である。FIG. 1 is a schematic cross-sectional view showing a casting device according to an embodiment of the present invention in a retracted position of a plunger.
【図２】本発明の一実施例の鋳造装置をシリンダスリー
ブへの給湯状態で示す概略断面図である。FIG. 2 is a schematic cross-sectional view showing a casting apparatus of one embodiment of the present invention in a state where hot water is supplied to a cylinder sleeve.
【図３】本発明の一実施例の鋳造装置をシリンダスリー
ブへの給湯状態で示す要部拡大断面図である。FIG. 3 is an enlarged cross-sectional view of an essential part showing the casting apparatus of one embodiment of the present invention in a state where hot water is supplied to the cylinder sleeve.
【図４】本発明の一実施例の鋳造装置をプランジャが前
進したキャビティへの充填状態で示す概略断面図であ
る。FIG. 4 is a schematic cross-sectional view showing a casting apparatus of one embodiment of the present invention in a state of filling a cavity in which a plunger has advanced.
【図５】従来の鋳造装置をシリンダスリーブへの給湯状
態で示す概略断面図である。FIG. 5 is a schematic sectional view showing a conventional casting device in a state where hot water is supplied to a cylinder sleeve.
１：鋳型 ２：真空ポンプ（真空源）
３：溶湯保持部 ４：シリンダスリーブ ５：溶湯供給路
６：湯量計量部材 １０：キャビティ ４０：プランジャ ６
０：溶湯検出センサ1: Mold 2: Vacuum pump (vacuum source)
3: Molten metal holding part 4: Cylinder sleeve 5: Molten metal supply path
6: Hot water amount measuring member 10: Cavity 40: Plunger 6
0: Molten metal detection sensor
Claims (1)
た真空源と、該鋳型の外部に設けられた溶湯保持部と、
該キャビティに連通し内部をプランジャが進退摺動され
るシリンダスリーブと、該シリンダスリーブに開口し該
溶湯保持部と該シリンダスリーブを連通する溶湯供給路
と、よりなり、該真空源により該キャビティを真空にし
た状態で該溶湯保持部から該溶湯供給路を介して該シリ
ンダスリーブに溶湯を供給し該プランジャを進出駆動す
ることで該キャビティに溶湯を充填して鋳造する鋳造装
置において、 該溶湯供給路の該開口と該キャビティの間の溶湯流路内
に出入自在に設けられ、一端に溶湯検出センサをもつと
ともに該溶湯流路内で溶湯を堰き止め可能な湯量計量部
材を備え、 該真空源からの負圧により該開口から該溶湯流路に流入
した溶湯を該溶湯流路に進入した該湯量計量部材で堰き
止め該溶湯検出センサの検出信号により該プランジャが
駆動されて該開口を塞ぐことで該溶湯流路に所定量の溶
湯を給湯し、次いで該湯量計量部材が該溶湯流路から退
出することで該溶湯流路内に蓄えられた溶湯を該プラン
ジャで該キャビティ内に充填可能に構成されたことを特
徴とする鋳造装置。1. A mold, a vacuum source connected to the cavity of the mold, and a molten metal holding portion provided outside the mold,
A cylinder sleeve that communicates with the cavity and in which the plunger slides forward and backward, and a molten metal supply path that opens into the cylinder sleeve and communicates the molten metal holding portion with the cylinder sleeve. In a casting apparatus for supplying molten metal from the molten metal holding portion to the cylinder sleeve through the molten metal supply passage in a vacuum state and driving the plunger to advance to fill the cavity with the molten metal and cast the molten metal, The vacuum source is provided with a molten metal detection sensor that is provided in a molten metal flow passage between the opening of the passage and the cavity so as to be able to move in and out, and has a molten metal detection sensor at one end and is capable of blocking the molten metal in the molten metal flow passage. The molten metal that has flowed into the molten metal flow path from the opening due to the negative pressure from the dam is blocked by the molten metal amount measuring member that has entered the molten metal flow path, and the plastic is detected by the molten metal detection sensor. The jar is driven to close the opening to supply a predetermined amount of molten metal to the molten metal flow path, and then the molten metal amount measuring member withdraws from the molten metal flow path to remove the molten metal stored in the molten metal flow path. A casting apparatus configured to be able to fill the cavity with the plunger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17474595A JPH0924454A (en) | 1995-07-11 | 1995-07-11 | Casting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17474595A JPH0924454A (en) | 1995-07-11 | 1995-07-11 | Casting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0924454A true JPH0924454A (en) | 1997-01-28 |
Family
ID=15983946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17474595A Pending JPH0924454A (en) | 1995-07-11 | 1995-07-11 | Casting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0924454A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001079654A (en) * | 1999-08-30 | 2001-03-27 | Mueller Weingarten Ag | Method for controlling metal supplying quantity |
| JPWO2004058434A1 (en) * | 2002-12-24 | 2006-04-27 | 日立金属株式会社 | Vacuum die casting product and method for manufacturing the same |
| ITMI20101606A1 (en) * | 2010-09-06 | 2012-03-07 | Maicopresse Spa | IMPROVED DEVICE FOR FILLING MOLTED METAL IN PRESSING CHAMBERS IN DIE-CASTING MACHINES |
| CN103624236A (en) * | 2013-09-16 | 2014-03-12 | 华南理工大学 | Squeeze casting quantitative pouring device and method |
| JP2014528840A (en) * | 2011-09-30 | 2014-10-30 | クルーシブル インテレクチュアル プロパティ エルエルシーＣｒｕｃｉｂｌｅ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｌｌｃ | Injection molding of amorphous alloys using an injection molding system |
| JP2014533204A (en) * | 2011-11-11 | 2014-12-11 | クルーシブル インテレクチュアル プロパティ エルエルシーＣｒｕｃｉｂｌｅ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｌｌｃ | Dual plunger rod for controlled transfer in injection molding system |
| US9302320B2 (en) | 2011-11-11 | 2016-04-05 | Apple Inc. | Melt-containment plunger tip for horizontal metal die casting |
| CN116140580A (en) * | 2023-04-17 | 2023-05-23 | 宁波力劲科技有限公司 | Cold chamber die casting machine with large injection quantity |
-
1995
- 1995-07-11 JP JP17474595A patent/JPH0924454A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001079654A (en) * | 1999-08-30 | 2001-03-27 | Mueller Weingarten Ag | Method for controlling metal supplying quantity |
| JPWO2004058434A1 (en) * | 2002-12-24 | 2006-04-27 | 日立金属株式会社 | Vacuum die casting product and method for manufacturing the same |
| JP4518256B2 (en) * | 2002-12-24 | 2010-08-04 | 日立金属株式会社 | Vacuum die casting product and method for manufacturing the same |
| ITMI20101606A1 (en) * | 2010-09-06 | 2012-03-07 | Maicopresse Spa | IMPROVED DEVICE FOR FILLING MOLTED METAL IN PRESSING CHAMBERS IN DIE-CASTING MACHINES |
| EP2425913A1 (en) * | 2010-09-06 | 2012-03-07 | Marconi S.r.l. Forni e Macchine Industriali | Improved device for filing molten metal into pressing chambers in die-casting machines |
| JP2014528840A (en) * | 2011-09-30 | 2014-10-30 | クルーシブル インテレクチュアル プロパティ エルエルシーＣｒｕｃｉｂｌｅ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｌｌｃ | Injection molding of amorphous alloys using an injection molding system |
| JP2014533204A (en) * | 2011-11-11 | 2014-12-11 | クルーシブル インテレクチュアル プロパティ エルエルシーＣｒｕｃｉｂｌｅ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｌｌｃ | Dual plunger rod for controlled transfer in injection molding system |
| US9302320B2 (en) | 2011-11-11 | 2016-04-05 | Apple Inc. | Melt-containment plunger tip for horizontal metal die casting |
| CN103624236A (en) * | 2013-09-16 | 2014-03-12 | 华南理工大学 | Squeeze casting quantitative pouring device and method |
| CN103624236B (en) * | 2013-09-16 | 2017-02-08 | 华南理工大学 | Squeeze casting quantitative pouring device and method |
| CN116140580A (en) * | 2023-04-17 | 2023-05-23 | 宁波力劲科技有限公司 | Cold chamber die casting machine with large injection quantity |
| CN116140580B (en) * | 2023-04-17 | 2023-09-05 | 宁波力劲科技有限公司 | Cold chamber die casting machine with large injection quantity |
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