JP2002035918A - Method for holding vacuum mold and suction pipeline apparatus - Google Patents
Method for holding vacuum mold and suction pipeline apparatusInfo
- Publication number
- JP2002035918A JP2002035918A JP2000216322A JP2000216322A JP2002035918A JP 2002035918 A JP2002035918 A JP 2002035918A JP 2000216322 A JP2000216322 A JP 2000216322A JP 2000216322 A JP2000216322 A JP 2000216322A JP 2002035918 A JP2002035918 A JP 2002035918A
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- JP
- Japan
- Prior art keywords
- mold
- pressure
- suction
- vacuum
- outside air
- 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
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、減圧鋳型造型法
（所謂Ｖプロセス）により造型した減圧鋳型の注湯時に
おける鋳型保持方法及びその吸引配管装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for holding a mold at the time of pouring a reduced-pressure mold formed by a reduced-pressure mold molding method (a so-called V process), and a suction piping device therefor.
【０００２】[0002]
【従来の技術】従来、減圧鋳型造型法（所謂Ｖプロセ
ス）により造型された減圧鋳型は、模型を取り付けた模
型定盤の平面度が経時変化等により低下して上下鋳型の
見切り面側に凹凸ができたり、成形フィルムの転写性が
悪いあるいは成形フィルムの厚さが過大である等の原因
で見切り面に隙間ができ、この隙間に溶湯が浸入して、
ばりを発生させる問題があった。特にアルミ合金製の門
扉やフェンスなどの格子状製品を鋳造する場合にばりが
多く発生していた。この問題を解決するために特公平１
−３４６９９号公報に開示されているように減圧鋳型に
対して物理的に外力を加えて見切り面の隙間を押圧変形
させて隙間をなくしばりの発生を防止するようにしてい
た。2. Description of the Related Art Conventionally, a vacuum mold molded by a vacuum mold molding method (a so-called V process) has a problem in that the flatness of a model platen on which a model is mounted is reduced due to a change over time or the like, so that the upper and lower molds have uneven surfaces. Or gaps are formed in the parting surface due to poor transferability of the molded film or the thickness of the molded film is excessive, etc.
There was a problem of generating burrs. In particular, when casting lattice products such as gates and fences made of aluminum alloy, many burrs were generated. To solve this problem, Tokuho 1
As disclosed in JP-A-34699, an external force is physically applied to the decompression mold to press and deform the gap in the parting surface, thereby eliminating the gap and preventing the occurrence of burrs.
【０００３】[0003]
【発明が解決しようとする課題】しかし上記のようなば
りは、製品によって発生場所や発生傾向が異なってくる
ため、その都度物理的外力の負荷を調整する必要があっ
た。また物理的に外力を加える方法では負荷を適切に設
定しないと見切り面の隙間のみならず本来必要な鋳型キ
ャビティ−まで押圧変形させてしまい、結果的に最終製
品である鋳物の変形を引き起すという問題もあった。本
発明は上記の問題に鑑みて成されたもので、減圧鋳型造
型法により造型した減圧鋳型に変形を与えず容易にばり
の発生を防止できる鋳型保持方法及びその吸引配管装置
を提供することを目的とする。However, burrs such as those described above vary in location and tendency of occurrence depending on the product, so it has been necessary to adjust the load of physical external force each time. Unless the load is properly set by the method of physically applying an external force, not only the gap of the parting surface but also the originally required mold cavity is pressed and deformed, and as a result, the casting as the final product is deformed. There were also problems. The present invention has been made in view of the above problems, and to provide a mold holding method and a suction piping device that can easily prevent the occurrence of burrs without deforming a reduced pressure mold formed by a reduced pressure molding method. Aim.
【０００４】[0004]
【課題を解決するための手段】上記の目的を達成するた
めに本発明における減圧鋳型の鋳型保持方法は、真空源
に吸引配管を介して連通する吸引鋳枠、成形フィルム、
耐熱性粒状充填物、及び遮蔽部材とにより造型された上
下半割れ減圧鋳型を型合せして構成した減圧鋳型への注
湯時における鋳型保持方法であって、前記注湯時に前記
減圧鋳型内部の圧力を検知すると共にその検知結果に基
づいて前記減圧鋳型内の圧力を一定に保つことを特徴と
する。In order to achieve the above-mentioned object, a method for holding a mold of a vacuum mold according to the present invention comprises a suction mold, a molded film, and a suction pipe which communicate with a vacuum source via a suction pipe.
A heat-resistant granular filler, and a mold holding method during pouring into a vacuum mold formed by combining upper and lower vacuum molds molded by a shielding member, wherein the inside of the vacuum mold during the pouring is provided. It is characterized in that the pressure is detected and the pressure in the decompression mold is kept constant based on the detection result.
【０００５】また本発明における減圧鋳型の吸引配管装
置は、真空源に吸引配管を介して連通する吸引鋳枠、成
形フィルム、耐熱性粒状充填物及び遮蔽部材とにより造
型された上下半割れ減圧鋳型を型合せして構成する減圧
鋳型の吸引配管装置であって、前記真空源と吸引鋳枠に
通じる吸引配管の途中に外気導入管を連通させると共に
該外気導入管に制御装置を介して作動される比例制御弁
を設け、該制御装置には前記減圧鋳型内の圧力を検知し
てその検知結果を送信する圧力センサ−を電気的に接続
したことを特徴とする。[0005] In addition, the suction pipe apparatus for a reduced pressure mold according to the present invention is a vertically split vacuum mold formed by a suction casting frame, a formed film, a heat-resistant granular filler and a shielding member which communicates with a vacuum source via a suction pipe. A suction pipe device of a reduced pressure mold constituted by combining the outside air introduction pipe in the middle of the suction pipe communicating with the vacuum source and the suction molding frame, and operated via a control device to the outside air introduction pipe. And a pressure sensor for detecting the pressure in the decompression mold and transmitting the detection result is electrically connected to the control device.
【０００６】[0006]
【発明の実施の形態】以下本発明の実施の形態を図面に
基づいて詳しく説明する。いわゆるＶプロセスにより造
型された減圧鋳型Ｍは、上下半割れ減圧鋳型Ｍ１、Ｍ２
を型合せして構成されている。該上半割れ減圧鋳型Ｍ１
は、吸引鋳枠１の下面に製品上面形状及び湯口系を成形
した成形フィルム２が吸着され、この成形フィルム２と
吸引鋳枠１とで画成する空間に耐熱性粒状充填物（例え
ば乾燥砂）３が充填され吸引鋳枠１の上面に遮蔽部材
（例えばフィルム）４が吸着されている。Embodiments of the present invention will be described below in detail with reference to the drawings. The vacuum mold M formed by the so-called V process is divided into upper and lower half vacuum molds M1 and M2.
Is configured. The upper half cracking decompression mold M1
A molded film 2 in which a product upper surface shape and a gate system are molded is adsorbed to a lower surface of a suction flask 1, and a space defined by the molded film 2 and the suction flask 1 is filled with a heat-resistant granular filler (for example, dry sand). 3) is filled, and a shielding member (for example, a film) 4 is adsorbed on the upper surface of the suction flask 1.
【０００７】また下半割れ減圧鋳型Ｍ２は、吸引鋳枠１
Ａの上面に製品下面形状を成形した成形フィルム２Ａが
吸着され、この成形フィルム２Ａと吸引鋳枠１Ａとで画
成する空間に耐熱性粒状充填物（例えば乾燥砂）３Ａが
充填され吸引鋳枠１Ａの下面に遮蔽部材（例えばフィル
ム）４Ａが吸着されている。[0007] The lower half-split decompression mold M2 is a suction mold 1
A molded film 2A having a molded product lower surface shape is adsorbed on the upper surface of A, and a space defined by the molded film 2A and the suction molding frame 1A is filled with a heat-resistant granular filler (for example, dry sand) 3A, and a suction molding frame is formed. A shielding member (for example, a film) 4A is attached to the lower surface of 1A.
【０００８】さらに前記吸引鋳枠１、１Ａには耐熱性粒
状充填物３、３Ａ内の空気を吸引する吸引機構５、５Ａ
が構成されていて、該吸引機構５、５Ａは吸引配管装置
Ｐに連通されている。該吸引配管装置Ｐは、吸引配管６
を介して真空源７に連通され、該吸引配管６の途中には
外気導入管８が分岐連通されており、該外気導入管８に
はマイクロコンピュ−タ−等より成る制御装置９により
作動される比例制御弁１０が取付けられていて、該制御
装置９には上半割れ減圧鋳型Ｍ１に突き刺されて減圧鋳
型Ｍ内の圧力を検知し信号を発する圧力センサ−１１が
電気的に接続されている。Further, the suction molds 1, 1A are provided with suction mechanisms 5, 5A for sucking air in the heat-resistant granular fillers 3, 3A.
The suction mechanisms 5 and 5A are connected to a suction piping device P. The suction pipe device P includes a suction pipe 6.
Is connected to a vacuum source 7 through the suction pipe 6, and an outside air introduction pipe 8 is branched and communicated in the middle of the suction pipe 6, and the outside air introduction pipe 8 is operated by a control device 9 including a micro computer or the like. The proportional control valve 10 is attached, and a pressure sensor 11 which pierces the upper half cracking depressurizing mold M1 to detect the pressure in the depressurizing mold M and emits a signal is electrically connected to the control device 9. I have.
【０００９】すなわち圧力センサ−１１により減圧鋳型
Ｍの圧力を検知し、この検知結果に基づいて制御装置９
から信号が出され、前記比例制御弁１０を必要に応じた
開度に調整し、吸引配管６内への外気の導入量を制御す
ることにより、減圧鋳型Ｍ内の圧力が常に一定になるよ
うに制御される。That is, the pressure of the decompression mold M is detected by the pressure sensor 11, and the control unit 9 is controlled based on the detection result.
From the pressure control valve 10, the proportional control valve 10 is adjusted to an opening degree as required, and the amount of outside air introduced into the suction pipe 6 is controlled so that the pressure in the decompression mold M is always constant. Is controlled.
【００１０】このように構成されたものは、真空源７が
作動されていて上下半割れ減圧鋳型Ｍ１、Ｍ２の内部が
所定の吸引圧力により鋳型保持されている図１の状態で
湯口系に溶湯の注入が開始されると溶湯熱により成形フ
ィルム２、２Ａが焼失し、減圧鋳型Ｍ内の圧力は上昇す
る。この上昇する圧力値を圧力センサ−１１が検知し、
その変化を制御装置９に送信する。制御装置９は圧力セ
ンサ−１１の圧力値が目標の設定値になるまで外気導入
用の比例制御弁１０の開度を調整する。[0010] With the above structure, the vacuum source 7 is operated, and the inside of the upper and lower half pressure reducing molds M1 and M2 is held by a predetermined suction pressure. Is started, the molded films 2 and 2A are burned out by the heat of the molten metal, and the pressure in the vacuum mold M rises. This rising pressure value is detected by the pressure sensor-11,
The change is transmitted to the control device 9. The controller 9 adjusts the opening of the outside air introduction proportional control valve 10 until the pressure value of the pressure sensor 11 reaches a target set value.
【００１１】この操作を注湯終了まで繰り返し行うこと
により、減圧鋳型Ｍ内の圧力は注湯により成形フィルム
２、２Ａが焼失しても一定の圧力値にされ鋳型保持が続
けられる。このため減圧鋳型Ｍ内の圧力が低く（真空度
合が高く）なり過ぎて溶湯を見切り面の隙間から浸入さ
せてばりを発生させることがなくなる。By repeating this operation until the pouring is completed, the pressure in the reduced-pressure mold M is kept at a constant pressure even if the molded films 2 and 2A are burned out by pouring, and the mold is kept held. For this reason, the pressure in the decompression mold M becomes too low (the degree of vacuum becomes too high), and the molten metal does not enter the gap of the parting surface to generate burrs.
【００１２】なお上記の実施の形態においては、圧力セ
ンサ−１１は減圧鋳型Ｍ内の圧力を検知しているが、吸
引配管６における減圧鋳型Ｍに近い部分の圧力を検知し
て比例制御弁１０を制御するようにしてもよい。In the above-described embodiment, the pressure sensor 11 detects the pressure in the pressure reducing mold M. However, the pressure sensor 11 detects the pressure in the suction pipe 6 near the pressure reducing mold M and detects the pressure in the proportional control valve 10. May be controlled.
【００１３】[0013]
【発明の効果】本発明は、上記の説明から明らかなよう
に、注湯時の減圧鋳型内の圧力を検知してその検知値に
応じて吸引配管内への外気の導入量を制御して減圧鋳型
内の圧力を常に一定に保つようにしたから、注湯時に過
大な吸引減圧がされなくなり溶湯の見切り面への浸入に
よるばりの発生がなくなる効果がある。また減圧鋳型の
吸引配管装置として吸引配管の途中に外気導入管を分岐
連通し、この外気導入管に制御装置により作動される比
例制御弁を取付けると共に制御装置に圧力センサ−を電
気的に接続させた構成にしたから、従来の減圧鋳型の吸
引配管に簡単な改造を加えるだけで減圧鋳型の注湯時に
おけるばりの発生をなくすことができるようになる。さ
らに、ばりを発生させることがないので、製品のばり取
り、仕上げ時間を大幅に短縮することができる等種々の
効果がある。As is apparent from the above description, the present invention detects the pressure in the pressure reducing mold at the time of pouring and controls the amount of outside air introduced into the suction pipe according to the detected value. Since the pressure inside the depressurizing mold is always kept constant, there is an effect that excessive suction and depressurization is not performed at the time of pouring and no burrs are generated due to penetration of the molten metal into the parting surface. Also, an outside air introduction pipe is branched and communicated in the middle of the suction pipe as a suction pipe apparatus for the pressure reducing mold, and a proportional control valve operated by a control device is attached to the outside air introduction pipe, and a pressure sensor is electrically connected to the control device. With this configuration, it is possible to eliminate the occurrence of burrs when pouring the vacuum mold by simply modifying the suction pipe of the conventional vacuum mold. Furthermore, since no burrs are generated, there are various effects such as the deburring of the product and the finishing time can be greatly reduced.
【図１】本発明の実施形態を示す構成縦断面図である。FIG. 1 is a longitudinal sectional view showing a configuration of an embodiment of the present invention.
１ １Ａ 吸引鋳枠 ２ ２Ａ 成形フィルム ３ ３Ａ 耐熱性粒状充填物 ４ ４Ａ 遮蔽部材 ６ 吸引配管 ７ 真空源 ８ 外気導入管 ９ 制御装置 １０ 比例制御弁 １１ 圧力センサ− Ｍ 減圧鋳型 Ｍ１ Ｍ２ 上下半割れ減圧鋳型 DESCRIPTION OF SYMBOLS 1 1A Suction casting frame 2 2A Molded film 3 3A Heat-resistant granular filler 4 4A Shielding member 6 Suction pipe 7 Vacuum source 8 External air introduction pipe 9 Controller 10 Proportional control valve 11 Pressure sensor M M Decompression mold M1 M2 template
Claims (4)
鋳枠、成形フィルム、耐熱性粒状充填物、及び遮蔽部材
とにより造型された上下半割れ減圧鋳型を型合せして構
成した減圧鋳型への注湯時における鋳型保持方法であっ
て、前記注湯時に前記減圧鋳型内部の圧力を検知すると
共にその検知結果に基づいて前記減圧鋳型内の圧力を一
定に保つことを特徴とする減圧鋳型の鋳型保持方法。1. A reduced-pressure mold formed by combining an upper and lower half-reduced reduced-pressure mold formed by a suction casting frame, a formed film, a heat-resistant granular filler, and a shielding member that communicates with a vacuum source via a suction pipe. A method for holding a mold during pouring into a mold, wherein the pressure inside the mold is detected at the time of pouring and the pressure inside the mold is kept constant based on the detection result. Mold holding method.
管内への外気の導入量の制御により成されることを特徴
とする請求項１記載の減圧鋳型の鋳型保持方法。2. The method according to claim 1, wherein the pressure in the vacuum mold is maintained by controlling the amount of outside air introduced into the suction pipe.
に分岐して設けた外気導入管に付設した比例制御弁の制
御により成されることを特徴とする請求項２記載の減圧
鋳型の鋳型保持方法。3. The vacuum mold according to claim 2, wherein the control of the amount of outside air introduced is performed by controlling a proportional control valve attached to the outside air introduction pipe branched from the suction pipe. Mold holding method.
吸引鋳枠１、１Ａ、成形フィルム２、２Ａ、耐熱性粒状
充填物３、３Ａ及び遮蔽部材４、４Ａとにより造型され
た上下半割れ減圧鋳型Ｍ１、Ｍ２を型合せして構成する
減圧鋳型Ｍの吸引配管装置であって、前記真空源７と吸
引鋳枠１、１Ａに通じる吸引配管６の途中に外気導入管
８を連通させると共に該外気導入管８に制御装置９を介
して作動される比例制御弁１０を設け、該制御装置９に
は前記減圧鋳型Ｍ内の圧力を検知してその検知結果を送
信する圧力センサ−１１を電気的に接続したことを特徴
とする減圧鋳型の吸引配管装置。4. An upper and lower mold formed by suction casting frames 1, 1A, formed films 2, 2A, heat-resistant granular fillers 3, 3A and shielding members 4, 4A communicating with a vacuum source 7 via suction pipes 6. A suction piping device for a reduced pressure mold M, which is formed by combining half-pressure reduced pressure molds M1 and M2. A pressure control valve 10 is provided in the outside air introducing pipe 8 and is operated via a control device 9. The control device 9 detects a pressure in the pressure reducing mold M and transmits a detection result. A suction piping device for a decompression mold, wherein 11 is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000216322A JP2002035918A (en) | 2000-07-17 | 2000-07-17 | Method for holding vacuum mold and suction pipeline apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000216322A JP2002035918A (en) | 2000-07-17 | 2000-07-17 | Method for holding vacuum mold and suction pipeline apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002035918A true JP2002035918A (en) | 2002-02-05 |
Family
ID=18711604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000216322A Pending JP2002035918A (en) | 2000-07-17 | 2000-07-17 | Method for holding vacuum mold and suction pipeline apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002035918A (en) |
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| WO2005095022A1 (en) * | 2004-04-01 | 2005-10-13 | Sintokogio, Ltd. | Method and device for pouring molten metal in vacuum molding and casting |
| JP2005313189A (en) * | 2004-04-28 | 2005-11-10 | Sintokogio Ltd | Method for pouring molten metal in vacuum molding, and cast product |
| WO2016189580A1 (en) * | 2015-05-22 | 2016-12-01 | 日産自動車株式会社 | Suction pressure casting method |
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2000
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| WO2005095022A1 (en) * | 2004-04-01 | 2005-10-13 | Sintokogio, Ltd. | Method and device for pouring molten metal in vacuum molding and casting |
| EP1731242A1 (en) * | 2004-04-01 | 2006-12-13 | Sintokogio, Ltd. | Method and device for pouring molten metal in vacuum molding and casting |
| EA008468B1 (en) * | 2004-04-01 | 2007-06-29 | Синтокогио, Лтд. | Method and device for pouring molten metal in vacuum molding and casting |
| EP1731242A4 (en) * | 2004-04-01 | 2007-09-12 | Sintokogio Ltd | Method and device for pouring molten metal in vacuum molding and casting |
| US7500507B2 (en) | 2004-04-01 | 2009-03-10 | Sintokogio, Ltd. | Method and device for pouring molten metal in vacuum molding and casting |
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| US7757746B2 (en) | 2004-04-01 | 2010-07-20 | Sintokogio, Ltd. | Pouring method, device, and cast in vacuum molding process |
| JP2005313189A (en) * | 2004-04-28 | 2005-11-10 | Sintokogio Ltd | Method for pouring molten metal in vacuum molding, and cast product |
| WO2016189580A1 (en) * | 2015-05-22 | 2016-12-01 | 日産自動車株式会社 | Suction pressure casting method |
| CN107614154A (en) * | 2015-05-22 | 2018-01-19 | 日产自动车株式会社 | Aspirate compression casting method |
| JPWO2016189580A1 (en) * | 2015-05-22 | 2018-03-08 | 日産自動車株式会社 | Suction pressure casting method |
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| JPWO2017017863A1 (en) * | 2015-07-24 | 2018-03-29 | 新東工業株式会社 | Cast iron casting, cast iron casting manufacturing method, and cast iron casting manufacturing equipment |
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