JPH02268963A - Suction casting method for green sand mold casting - Google Patents
Suction casting method for green sand mold castingInfo
- Publication number
- JPH02268963A JPH02268963A JP1091615A JP9161589A JPH02268963A JP H02268963 A JPH02268963 A JP H02268963A JP 1091615 A JP1091615 A JP 1091615A JP 9161589 A JP9161589 A JP 9161589A JP H02268963 A JPH02268963 A JP H02268963A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- mold
- casting mold
- core
- suction
- 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 23
- 238000000034 method Methods 0.000 title claims description 11
- 239000004576 sand Substances 0.000 title abstract description 5
- 239000007789 gas Substances 0.000 abstract description 48
- 239000002184 metal Substances 0.000 abstract description 9
- 230000001105 regulatory effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000007547 defect Effects 0.000 description 5
- 238000000465 moulding Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 206010011224 Cough Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、生型鋳造における吸引鋳造方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a suction casting method in green casting.
（従来の技術）
砂型で形成した生型鋳型により鋳造する場合、注湯時に
鋳型や中子から多量のガスが発生し、該ガスが製品内に
入り込んでガス欠陥が生じる。(Prior Art) When casting with a green mold formed by a sand mold, a large amount of gas is generated from the mold and core during pouring, and the gas enters into the product, causing gas defects.
そこで、従来は、鋳型にガス抜き穴や、揚がりを設けて
ガスを大気中に放出し、ガス欠陥の発生を防止していた
。Conventionally, therefore, gas vent holes and bulges were provided in the mold to release the gas into the atmosphere to prevent gas defects from occurring.
しかし、ガス抜き穴や揚がりを設けても、ガスを完全に
大気中に放出することができず、残ったガスは鋳物製品
の表面層にガス欠陥として残ると言う問題があった。However, even if gas vent holes or ridges are provided, the gas cannot be completely released into the atmosphere, and the remaining gas remains as gas defects on the surface layer of the cast product.
そこで、例えば、特開昭５７−１６０５６５号公報に記
載のように、鋳造時に発生する鋳型ガスをガス吸引ポン
プにより強制的に吸引して、鋳型外に排出するようにし
た吸引鋳造方法が提案されている。Therefore, for example, as described in Japanese Patent Application Laid-Open No. 57-160565, a suction casting method has been proposed in which the mold gas generated during casting is forcibly sucked by a gas suction pump and discharged outside the mold. ing.
（発明が解決しようとする課題）
前記従来の吸引鋳造方法によれば、ガス欠陥の発生は防
止されるが、しかし、この従来法は、鋳型に、中子に達
するガス抜き穴を設け、このガス抜き穴に吸引管を接続
してガスを吸引排出するものであるから、鋳型には、押
し湯や揚がり（へヶ湯）を従来と同様に設けなければな
らなかった。(Problems to be Solved by the Invention) According to the conventional suction casting method described above, the occurrence of gas defects is prevented. However, in this conventional method, the mold is provided with a gas vent hole that reaches the core, Since the gas is sucked and discharged by connecting a suction pipe to the gas vent hole, the mold had to be provided with a riser and a riser (hegayu) as in the past.
従って、従来の吸引鋳造方法では、鋳型製作時に、押し
湯や揚がりの穴明は作業が必要となり、かつ、注湯時に
は、押し湯や揚がりに不用な湯を供給しなければならず
鋳造歩溜りが悪くなり、更に、製品の出荷に際して、押
し湯や揚がりをグラインダ等で取り除く作業が必要とな
り、また、加工に際しては、押し湯跡や揚がり跡を機械
加工しなければならず、コスト高を招いていた。Therefore, in the conventional suction casting method, it is necessary to drill the holes for the riser and the riser when making the mold, and when pouring, it is necessary to supply unnecessary hot water to the riser and the riser, which reduces the casting yield. Furthermore, when shipping the product, it is necessary to remove the rising water and fried parts using a grinder, etc., and during processing, the rising water marks and fried parts must be machined, which leads to high costs. was.
そこで、本発明は、押し湯や揚がりを不要とした吸引鋳
造方法を提供することを目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a suction casting method that does not require a riser or frying.
（課題を解決するための手段）
前記目的を達成するため、本発明は、次の手段を講じた
。即ち、本発明の特徴とする処は、生型の鋳型に注湯す
るときに発生する鋳型ガスおよび中子ガスを、鋳型の表
面から個別に吸引し、かつ、鋳型ガスと中子ガスの吸引
圧力を個別に調整自在とした点にある。(Means for Solving the Problems) In order to achieve the above object, the present invention takes the following measures. In other words, the present invention is characterized in that the mold gas and core gas generated when pouring into a green mold are individually sucked from the surface of the mold, and the mold gas and core gas are suctioned. The key point is that the pressure can be adjusted individually.
（作 用）
本発明によれば、鋳型から発生する鋳型ガス、および、
中子から発生する中子ガスは、個別に吸引される。そし
て、この吸引圧力は個別に調整される。従って、ガス発
生量に見合った適切な吸引が行われ、かつ、鋳型内の製
品形成中空部内の空気も吸引排出されるので、押し湯や
陽がりがなくとも、湯は鋳型内を充満することができる
。(Function) According to the present invention, mold gas generated from the mold, and
Core gas generated from the core is individually sucked. This suction pressure is then adjusted individually. Therefore, appropriate suction is performed according to the amount of gas generated, and the air inside the product forming hollow part in the mold is also suctioned and discharged, so hot water can fill the mold even without boiling water or sunlight. I can do it.
（実施例） 以下、本発明の実施例を図面に基づき説明する。(Example) Embodiments of the present invention will be described below based on the drawings.
第１図及び第２図に示すものは、本発明方法に使用され
る鋳造装置である。同図において、１は下枠、２は上枠
、３は下部鋳型、４は上部鋳型、５は中子である。前記
下枠ｌは図示省略のパレット上に置かれている。このパ
レットは、造型場、注湯場、砂処理場を循環するエンド
レスコンベヤ上に載置されている。What is shown in FIGS. 1 and 2 is a casting apparatus used in the method of the present invention. In the figure, 1 is a lower frame, 2 is an upper frame, 3 is a lower mold, 4 is an upper mold, and 5 is a core. The lower frame 1 is placed on a pallet (not shown). This pallet is placed on an endless conveyor that circulates through the molding plant, pouring plant, and sand processing plant.
前記上、下部鋳型３，４及び中子５は砂型から成る生型
である。上・下部鋳型３，４と中子５間に、製品成形用
の中空部６が形成され、この中空部６に湯道７が連通し
ている。この鋳型には、従来のような押し湯や揚がりは
形成されていない。The upper and lower molds 3 and 4 and the core 5 are green molds made of sand molds. A hollow part 6 for product molding is formed between the upper and lower molds 3 and 4 and the core 5, and a runner 7 communicates with this hollow part 6. This mold does not have a conventional riser or bulge.
前記中子５は中空中子であり、咳中子５の中空部８に連
通ずるガス抜き孔９が、上部鋳型４に形成されている。The core 5 is a hollow core, and a gas vent hole 9 communicating with the hollow part 8 of the cough core 5 is formed in the upper mold 4.
このガス抜き孔９は上部鋳型４の上面に開口している。This gas vent hole 9 is open on the upper surface of the upper mold 4.
また、このガス抜き孔９は、上枠２の周辺部に複数個配
置されている。Further, a plurality of gas vent holes 9 are arranged around the upper frame 2 .
前記上枠２及び上部鋳型４の上面（注湯口を除いて）を
覆うように吸引パッド１０が着脱自在に載置されている
。このパッド１０と上枠２及び上部鋳型４間にシール材
１１が介在されて気密が保持されている。A suction pad 10 is removably placed so as to cover the upper surfaces of the upper frame 2 and upper mold 4 (excluding the spout). A sealing material 11 is interposed between the pad 10, the upper frame 2, and the upper mold 4 to maintain airtightness.
前記吸引パッド１０内は、複数のブロックＡ−Ｈに区画
されている。各ブロックＡ〜已に制御弁１２を介して吸
引パイプ１３が接続され、この吸引バイブ１３は真空ポ
ンプ（図示省略）に接続されている。The interior of the suction pad 10 is divided into a plurality of blocks A to H. A suction pipe 13 is connected to each block A through a control valve 12, and this suction vibrator 13 is connected to a vacuum pump (not shown).
前記各ブロックＡ−Ｅ毎に設けられた制御弁１２は吸引
圧力を個別に制御し、かつ、入・切制御する。The control valves 12 provided for each of the blocks A to E individually control the suction pressure and turn on and off.
次に、前記鋳型装置を用いて鋳造する方法を説明する。Next, a method of casting using the mold apparatus will be explained.
パレット上に載置された鋳型が注湯場に来ると、湯道７
を除いた上部鋳型４の上面及び上枠２の上面が吸引パッ
ド１０で覆われる。次に、湯道７から溶湯が注湯される
。湯道７を通った湯は製品中空部６を充満する。When the mold placed on the pallet reaches the pouring place, runner 7
The upper surface of the upper mold 4 and the upper surface of the upper frame 2 except for the upper surface of the upper mold 4 and the upper surface of the upper frame 2 are covered with a suction pad 10. Next, molten metal is poured from the runner 7. The hot water passing through the runner 7 fills the hollow part 6 of the product.
前記注湯に際し、溶湯からガスが発生し、かつ上部鋳型
４から鋳型ガスが発生する。また中子５から中子ガスが
発生する。これらのガスは吸引パッド１０を介して強制
吸引される。During the pouring, gas is generated from the molten metal, and mold gas is also generated from the upper mold 4. Further, core gas is generated from the core 5. These gases are forcibly sucked through the suction pad 10.
即ち、中子ガスは中子５の中空部８及びガス抜き孔９を
介してパッド１０のブロックＡに吸引される。また、溶
湯ガスや鋳型ガスは、上部鋳型４の上面からブロックＢ
−Ｈに吸引される。本実施例では、中子ガスが多量に発
生するので、ブロックＡの吸引圧力が他のブロックより
も強くなるよう制御弁１２が自動制御されている。That is, the core gas is sucked into the block A of the pad 10 through the hollow part 8 of the core 5 and the gas vent hole 9. In addition, the molten metal gas and mold gas flow from the top surface of the upper mold 4 to the block B.
- Attracted to H. In this embodiment, since a large amount of core gas is generated, the control valve 12 is automatically controlled so that the suction pressure of block A is stronger than that of the other blocks.
本実施例によれば、注湯に際して強制吸引するので、鋳
型内の製品中空部６の空気も吸われるので、従来のよう
な押し湯や揚がりがなくとも、溶湯は中空部６に充満す
る。従って、押し湯や揚がりが不要になる。According to this embodiment, since the molten metal is forcibly suctioned during pouring, the air in the hollow part 6 of the product in the mold is also sucked in, so that the molten metal fills the hollow part 6 even without the need for raising or lifting as in the conventional method. Therefore, there is no need for boiling water or frying.
前記パッド１０による吸引時間は、注湯開始前から、溶
湯が凝固するまでである。この吸引が終了すると制御弁
１２は閉じられ、パッド１０は鋳型から取外され、該鋳
型は次工程に移動する。そして、パッド１０は、新しく
来た鋳型の上面に取付けられる。The suction time by the pad 10 is from before the start of pouring to when the molten metal solidifies. When this suction is finished, the control valve 12 is closed, the pad 10 is removed from the mold, and the mold is moved to the next process. The pad 10 is then attached to the top of the new mold.
尚、製品の形状に応じて、パッド１０内のブロックＡ−
Ｅの吸引圧力は制御弁１２により個別に調整される。In addition, depending on the shape of the product, the block A-
The suction pressure of E is individually adjusted by the control valve 12.
本発明は前記実施例に限定されるものではない。The present invention is not limited to the above embodiments.
（発明の効果）
本発明によれば、ガス欠陥が防止され、高品質の製品を
鋳造することができ、かつ押し湯や揚がりが不要となり
、製造コストの低減が図れるものである。(Effects of the Invention) According to the present invention, gas defects are prevented, high-quality products can be cast, and no riser or frying is required, thereby reducing manufacturing costs.
第１図は本発明方法に使用する鋳型装置の断面図、第２
図はパッド内部を区画した状態を示す平面図である。
１．２・・・上下枠、３．４・・・上下鋳型、５・・・
中子、１０・・・吸引パッド。Figure 1 is a sectional view of the molding device used in the method of the present invention, Figure 2
The figure is a plan view showing a state in which the inside of the pad is partitioned. 1.2... Upper and lower frames, 3.4... Upper and lower molds, 5...
Core, 10... Suction pad.
Claims (1)
よび中子ガスを、鋳型の表面から個別に吸引し、かつ、
鋳型ガスと中子ガスの吸引圧力を個別に調整自在とした
ことを特徴とする生型鋳造における吸引鋳造方法。(1) Separately suctioning mold gas and core gas generated when pouring into a green mold from the surface of the mold, and
A suction casting method in green mold casting, characterized in that the suction pressures of mold gas and core gas can be adjusted individually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1091615A JPH0741400B2 (en) | 1989-04-10 | 1989-04-10 | Suction casting method in green casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1091615A JPH0741400B2 (en) | 1989-04-10 | 1989-04-10 | Suction casting method in green casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02268963A true JPH02268963A (en) | 1990-11-02 |
| JPH0741400B2 JPH0741400B2 (en) | 1995-05-10 |
Family
ID=14031477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1091615A Expired - Fee Related JPH0741400B2 (en) | 1989-04-10 | 1989-04-10 | Suction casting method in green casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0741400B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0460344U (en) * | 1990-09-27 | 1992-05-25 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4150764B2 (en) | 2005-09-15 | 2008-09-17 | 政人 五家 | Casting method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61245941A (en) * | 1985-04-23 | 1986-11-01 | Hitachi Metals Ltd | Vacuum molding method |
-
1989
- 1989-04-10 JP JP1091615A patent/JPH0741400B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61245941A (en) * | 1985-04-23 | 1986-11-01 | Hitachi Metals Ltd | Vacuum molding method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0460344U (en) * | 1990-09-27 | 1992-05-25 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0741400B2 (en) | 1995-05-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |