JPH01278936A - Method for setting lost foam pattern into molding sand - Google Patents
Method for setting lost foam pattern into molding sandInfo
- Publication number
- JPH01278936A JPH01278936A JP10604988A JP10604988A JPH01278936A JP H01278936 A JPH01278936 A JP H01278936A JP 10604988 A JP10604988 A JP 10604988A JP 10604988 A JP10604988 A JP 10604988A JP H01278936 A JPH01278936 A JP H01278936A
- Authority
- JP
- Japan
- Prior art keywords
- molding sand
- lost foam
- air
- foam pattern
- frame
- 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
- 239000003110 molding sand Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 16
- 239000006260 foam Substances 0.000 title abstract 7
- 238000005266 casting Methods 0.000 claims description 18
- 239000004576 sand Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 239000004744 fabric Substances 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 9
- 238000012856 packing Methods 0.000 abstract 2
- 208000015943 Coeliac disease Diseases 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008034 disappearance Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Casting Devices For Molds (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ポリスチレン発泡体等で目的とする鋳物形状
に成形した消失模型を鋳枠内の鋳物砂に埋設した後、溶
湯を注湯して消失模型を消失させながら鋳物を得る消失
模型鋳造方法に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention involves embedding a disappearing model made of polystyrene foam or the like into a desired casting shape in molding sand in a casting flask, and then pouring molten metal into it. The present invention relates to a vanishing model casting method for obtaining a casting while vanishing the vanishing model.
（従来技術）
従来より、異形管等を鋳造により得る場合、それに用い
られる筒状消失模型を鋳物砂でバックアップし、消失模
型に直接溶湯を注入し置換させて鋳物を得る（例えば特
開昭５９−１９１５４３号公報参照）。この鋳物砂の充
填時に、消失模型の固定が不充分であると鋳物砂の移動
により生じる消失模型への荷重で消失模型が変形し、目
的とする鋳物が得られない場合が起きていた。この変形
を防止するために、湯口、湯道、堰などを太く強固とす
ることが行われているが、この方法では鋳造歩留りが悪
く、堰切断等の後工程に多くの時間を要していた。(Prior art) Conventionally, when obtaining irregularly shaped pipes, etc. by casting, a cylindrical disappearing model used therein is backed up with foundry sand, and molten metal is directly injected into the disappearing model to replace it to obtain a casting (for example, in JP-A-59 (Refer to Publication No.-191543). When filling with molding sand, if the vanishing model is insufficiently fixed, the vanishing model may be deformed by the load on the vanishing model caused by the movement of the molding sand, and the desired casting may not be obtained. In order to prevent this deformation, sprues, runners, weirs, etc. are made thicker and stronger, but this method has a poor casting yield and requires a lot of time for post-processes such as weir cutting. Ta.
（発明の目的）
本発明は、上記課題に鑑みてなされたもので、その目的
とするところは、上記の如く異形管等鋳物砂の充填時に
変形し易い消失模型の湯口、湯道、堰等を必要以上に太
く強固にすることなく、鋳物砂充填時に消失模型に変形
を生じさせないことにある。(Objective of the Invention) The present invention has been made in view of the above-mentioned problems, and its purpose is to provide sprues, runners, weirs, etc. of vanishing models that are easily deformed when filled with molding sand, such as irregularly shaped pipes, as described above. The aim is to prevent deformation of the disappearing model when filling with foundry sand without making it thicker and stronger than necessary.
（発明の構成）
上記し１的を達成するための本発明の構成上の特徴は、
消失模型を鋳枠内の鋳物砂に埋設し、その後、消失模型
を溶湯により消失させながら鋳物を得る消失模型鋳造方
法における消失模型の砂型への投入方法であって、内部
に供給されるエアによりエア膨張体を膨張させて消失模
型を支持する工程と、エア膨張体に支持された消失模型
の周囲へ鋳物砂を充填し消失模型を鋳物砂で保持する工
程と、エア膨張体内部のエアを排出しエア膨張体を鋳物
砂内から取り出す工程とを有することである。(Structure of the Invention) The structural features of the present invention for achieving the above-mentioned object 1 are as follows:
A method of charging a vanishing model into a sand mold in a vanishing model casting method in which a vanishing model is buried in molding sand in a casting flask, and then a casting is obtained while disappearing with molten metal, and the vanishing model is placed in a sand mold by air supplied inside. A process of inflating the air expansion body to support the vanishing model, a process of filling molding sand around the vanishing model supported by the air expansion body and holding the vanishing model with the molding sand, and a process of expanding the air inside the air expansion body. and a step of discharging and taking out the air expanded body from within the molding sand.
（発明の効果）
本発明の消失模型の砂型への投入方法によれば、異形管
等鋳物砂の充填時に変形し易い消失模型の湯口、湯道、
堰等を必要以上に太く強固にすることなく、鋳物砂充填
時に消失模型を確実に固定して消失模型に変形を生じさ
せず、精度の良い鋳物を得ることができる。(Effects of the Invention) According to the method of putting a disappearing model into a sand mold of the present invention, the sprue, runner,
To obtain a highly accurate casting without making a weir or the like unnecessarily thick and strong, by reliably fixing a vanishing model when filling with molding sand, and preventing deformation of the vanishing model.
（実施例） 以Ｆ、本発明の実施例を図面に従って詳細に説明する。(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
消失模型１は、目的とする形状をした製品部１ａと、堰
１ｂ、湯道１ｃ１楊口１ｄとがら形成されており、堰ｌ
ｂ Ｎ ｙｊＪ道１ｃ１湯口１ｄは湯のまわり昌さを
考えて大きさ及び形状が決定される。The vanishing model 1 is formed of a product part 1a having a desired shape, a weir 1b, a runner 1c, and a yoke 1d.
The size and shape of the spout 1d of the b N yjJ road 1c1 are determined by considering the circumference of the hot water.
本実施例の場合、消失模型ｌが曲った形状をしたもので
あるため、鋳物砂８の充填時に変形を生じ易い。In the case of this embodiment, since the disappearing model l has a curved shape, it is likely to be deformed during filling with molding sand 8.
消失模型１のまわりに砂を充填するため（こ供ゎれる消
失模型１の投入装置２について、第１図及び第２図に従
って説明する。The insertion device 2 for the vanishing model 1, which is used to fill sand around the vanishing model 1, will be explained with reference to FIGS. 1 and 2.
投入装置２は、パイプで構成されたフレーム３に対して
エア膨張体４が支詩板５を介して固定されている。この
エア膨張体４には、エア供給を行うエア供給ポンプ（図
示路）と接続するためエア供給通路６が接続され、エア
供給通路６の途中には、エア膨張体４に供給されたエア
を大気に解放するための切換バルブ７が設けられている
。フレーム３の下側には、消失模型１をセットするため
の布材９が設けられている。布材９は、消失模型１の下
側を支持するためのものであり、端部９ａをフレーム３
に設けられた電磁石１０とフレーム３との間で磁力によ
り固定されるようになっている。また、一方の端部９ｂ
は、フレーム３の角に回転自在に設けられている回転ロ
ーラ１１に支持されたワイヤー１２に接続され、電磁石
ｉｏの固定を解除してワイヤー１２を引っ張ることで布
材９をフレーム３の下側から抜き取ることができるよう
になっている。In the charging device 2, an air expansion body 4 is fixed to a frame 3 made of a pipe via a support plate 5. An air supply passage 6 is connected to this air expansion body 4 in order to connect it to an air supply pump (path shown in the figure) that supplies air. A switching valve 7 is provided for release to the atmosphere. A cloth material 9 for setting the disappearing model 1 is provided on the lower side of the frame 3. The cloth material 9 is for supporting the lower side of the disappearing model 1, and the end portion 9a is attached to the frame 3.
The electromagnet 10 provided in the frame 3 is fixed by magnetic force between the frame 3 and the electromagnet 10 provided therein. Also, one end 9b
is connected to a wire 12 supported by a rotary roller 11 rotatably provided at a corner of the frame 3, and by releasing the fixation of the electromagnet io and pulling the wire 12, the cloth material 9 is moved to the lower side of the frame 3. It is now possible to extract it from the
上記投入装置２は、消失模型１を支持した状態で第３図
に示す鋳枠１３内へ投入され、鋳枠１３の下側に設けら
れた振動装置１４により振動を加えながら消失模型１の
周囲に鋳造砂８が充填される。The charging device 2 is loaded into the flask 13 shown in FIG. 3 while supporting the vanishing model 1, and is vibrated around the vanishing model 1 by a vibration device 14 provided at the bottom of the flask 13. is filled with casting sand 8.
次に、本実施例を工程順に説明する。Next, this embodiment will be explained in order of steps.
投入装置２の下側の布材９をセ、トシ、端部９ａを電磁
石１０でフレーム３に固定する。この状態で消失模型１
を布材９上に載置し、エア供給ポンプ（図示路）を作動
させてエア供給通路６を通してエア膨張体４の膨張によ
り両側から消失模型１をフレーム３に対して支持する。The cloth material 9 on the lower side of the feeding device 2 is fixed to the frame 3 at the end 9a with an electromagnet 10. Model 1 disappears in this state
is placed on the fabric material 9, the air supply pump (shown in the figure) is operated, and the air expansion body 4 is expanded through the air supply passage 6, thereby supporting the vanishing model 1 with respect to the frame 3 from both sides.
フレーム３に対して支持されている消失模型１を第３図
に示すように、鋳物砂８を下側に少し入れた状態の鋳枠
１３に対して投入し、電磁石１゜を解除してワイヤー１
２を引っ張りフレーム３Ｆ側の布材９を抜き取る。その
後、振動装置１４により鋳枠１３に振動を加えながら鋳
物砂８を」一方から鋳枠１３内に充填する。As shown in Fig. 3, the vanishing model 1 supported on the frame 3 is put into the casting flask 13 with a little bit of molding sand 8 added to the bottom, and the electromagnet 1° is released to remove the wire. 1
2 and pull out the cloth material 9 on the frame 3F side. Thereafter, molding sand 8 is filled into the flask 13 from one side while applying vibration to the flask 13 using the vibration device 14.
第４図に示すように、鋳物砂８の充填を行い、鋳物砂８
そのものにより消失模型１が固定される高さになると、
切換バルブ７を切換えてエア膨張体４内のエアを大気に
開放し、エア膨張体４を鋳物砂８の重さにより収縮させ
、消失模型１のエア膨張体４による支持をやめ、フレー
ム３を上方へ移動させる。As shown in FIG. 4, the molding sand 8 is filled with molding sand 8.
When it reaches the height where the vanishing model 1 is fixed,
The switching valve 7 is switched to release the air in the air expansion body 4 to the atmosphere, the air expansion body 4 is contracted by the weight of the molding sand 8, the support of the vanishing model 1 by the air expansion body 4 is stopped, and the frame 3 is move it upwards.
次に、第５図に示すように所定の高さまで鋳物砂８を充
填し、鋳物砂８の充填を完了する。この時、消失模型１
は先に充填されている鋳物砂にょり確実に固定されいる
ので変形を生じることはない。Next, as shown in FIG. 5, the molding sand 8 is filled up to a predetermined height to complete the filling of the molding sand 8. At this time, disappearing model 1
Since the molding sand is firmly fixed by the molding sand filled in first, no deformation occurs.
以上説明したように、本実施例によれば、鋳物砂８の充
填時に変形し易い消失模型１の堰ｔｂ。As explained above, according to this embodiment, the weir tb of the disappearing model 1 is easily deformed when filling with the foundry sand 8.
湯道１ ｃ ｓ 湯口１ｄを必要以上に太く強固にする
ことなく、鋳物砂８充填時に消失模型１を確実に保持し
て消失模型１の変形を防止でき、効率よくｒｎ度良い鋳
物を得ることができる。Runway 1cs To securely hold the vanishing model 1 and prevent deformation of the vanishing model 1 when filling molding sand 8 without making the sprue 1d unnecessarily thick and strong, and to efficiently obtain a casting with good rn degree. I can do it.
図面は本発明の一実施例を示し、第１図は消失模型の投
入装置を示す側］■図、第２図は消失横型の没入装置を
示す斜視図、第３図は消失模型の投入状態を示す説明図
、第４図は鋳物砂の充填状態を示す説明図、第５図は鋳
物砂の充填完了を示す説明図である。
１・・・・・・消失横型、２・・・・・・投入装置、４
・・・・・・エア膨張体、８・・・・・・鋳物砂、１３
・・・・・・鋳枠。The drawings show an embodiment of the present invention, and FIG. 1 is a side showing a disappearing model insertion device], FIG. 2 is a perspective view showing a disappearing horizontal type immersion device, and FIG. 3 is a side showing a disappearing model insertion state. FIG. 4 is an explanatory diagram showing the state of filling of molding sand, and FIG. 5 is an explanatory diagram showing the completion of filling of molding sand. 1... Disappearance horizontal type, 2... Loading device, 4
... Air expansion body, 8 ... Foundry sand, 13
...Cast flask.
Claims (1)
を溶湯により消失させながら鋳物を得る消失模型鋳造方
法における消失模型の砂型への投入方法であって、内部
に供給されるエアによりエア膨張体を膨張させて消失模
型を支持する工程と、エア膨張体に支持れた消失模型の
周囲へ鋳物砂を充填し消失模型を鋳物砂で保持する工程
と、エア膨張体内部のエアを排出してエア膨張体を鋳物
砂内から取り出す工程とを有することを特徴とする消失
模型の砂型への投入方法。A method of charging a vanishing model into a sand mold in a vanishing model casting method in which a vanishing model is buried in molding sand in a casting flask, and then a casting is obtained while disappearing with molten metal, and the vanishing model is placed in a sand mold by air supplied inside. A process of inflating the air expansion body to support the vanishing model, a process of filling molding sand around the vanishing model supported by the air expansion body and holding the vanishing model with molding sand, and a process of expanding the air inside the air expansion body. A method for introducing a vanishing model into a sand mold, comprising the step of discharging and taking out the air expanding body from the molding sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10604988A JPH01278936A (en) | 1988-04-28 | 1988-04-28 | Method for setting lost foam pattern into molding sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10604988A JPH01278936A (en) | 1988-04-28 | 1988-04-28 | Method for setting lost foam pattern into molding sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01278936A true JPH01278936A (en) | 1989-11-09 |
Family
ID=14423772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10604988A Pending JPH01278936A (en) | 1988-04-28 | 1988-04-28 | Method for setting lost foam pattern into molding sand |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01278936A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5265664A (en) * | 1991-12-27 | 1993-11-30 | The United States Of America As Represented By The Secretary Of The Interior | Fixture for forming evaporative pattern (EPC) process patterns |
| CN105618681A (en) * | 2016-03-09 | 2016-06-01 | 安徽蚌埠天雨泵业有限公司 | Machining device for water outlet pipe of immersible pump |
| CN108907096A (en) * | 2018-08-01 | 2018-11-30 | 合肥禾松信息科技有限公司 | A kind of aluminium machining lost foam casting technique |
-
1988
- 1988-04-28 JP JP10604988A patent/JPH01278936A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5265664A (en) * | 1991-12-27 | 1993-11-30 | The United States Of America As Represented By The Secretary Of The Interior | Fixture for forming evaporative pattern (EPC) process patterns |
| CN105618681A (en) * | 2016-03-09 | 2016-06-01 | 安徽蚌埠天雨泵业有限公司 | Machining device for water outlet pipe of immersible pump |
| CN108907096A (en) * | 2018-08-01 | 2018-11-30 | 合肥禾松信息科技有限公司 | A kind of aluminium machining lost foam casting technique |
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