JPH0244924Y2 - - Google Patents
Info
- Publication number
- JPH0244924Y2 JPH0244924Y2 JP19226986U JP19226986U JPH0244924Y2 JP H0244924 Y2 JPH0244924 Y2 JP H0244924Y2 JP 19226986 U JP19226986 U JP 19226986U JP 19226986 U JP19226986 U JP 19226986U JP H0244924 Y2 JPH0244924 Y2 JP H0244924Y2
- Authority
- JP
- Japan
- Prior art keywords
- stalk
- porous
- tube
- molten metal
- lower platen
- 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.)
- Expired
Links
- 239000011261 inert gas Substances 0.000 claims description 15
- 238000005266 casting Methods 0.000 claims description 7
- 239000003566 sealing material Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000009423 ventilation Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 description 18
- 239000007789 gas Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Details (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、保持炉内の溶湯を加圧気体により加
圧してストーク管を介し金型に充填せしめるよう
にした低圧鋳造機の改良に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a low-pressure casting machine in which molten metal in a holding furnace is pressurized with pressurized gas and filled into a mold via a stalk pipe.
（従来技術と問題点）
一般に低圧鋳造機においては、ストーク管が下
金型にそのキヤビテイ部と連通して垂設されてい
るため、ストーク管内の溶湯は、上面が常に外気
にさらされている。したがつて、ストーク管内の
溶湯の上面に酸化物が生じ、その酸化物は溶湯と
共に金型に装入されて欠陥鋳物を誘発させてい
た。(Prior art and problems) In general, in low-pressure casting machines, the stalk pipe is vertically installed in the lower mold in communication with the cavity, so the upper surface of the molten metal in the stalk pipe is always exposed to the outside air. . Therefore, oxides are generated on the upper surface of the molten metal in the stalk pipe, and the oxides are charged into the mold together with the molten metal, causing defective castings.
（考案の目的）
本考案は上記の事情に鑑みてなされたもので、
ストーク管内の溶湯の上面に酸化物が発生しない
ようにした低圧鋳造機を提供すること目的とす
る。(Purpose of the invention) This invention was made in view of the above circumstances.
An object of the present invention is to provide a low-pressure casting machine in which oxides are not generated on the upper surface of molten metal in a stalk pipe.
（考案の構成）
以下、本考案の構成について実施例の図面に基
づき詳細に説明する。１は箱状の基台で、該基台
１上には保持炉２が設置されている。また、該保
持炉２上には供給口３を備えた炉蓋４が気密状に
設置され、該炉蓋４の中央部には、上端部にフラ
ンジを有するストーク管５が炉蓋４を上下に貫通
して垂設されている。また、炉蓋４の上方には下
プラテン６が配設され、該下プラテン６における
ストーク管５の対向位置には上下に貫通する貫通
孔６ａが形成されている。該貫通孔６ａには、下
端部にフランジを有するポーラスストーク管７が
それを貫通して取り付けられている。(Structure of the invention) Hereinafter, the structure of the invention will be described in detail based on drawings of embodiments. Reference numeral 1 denotes a box-shaped base, and a holding furnace 2 is installed on the base 1. Further, a furnace lid 4 equipped with a supply port 3 is airtightly installed on the holding furnace 2, and in the center of the furnace lid 4, a stalk pipe 5 having a flange at the upper end is connected up and down the furnace lid 4. It penetrates and is installed vertically. Further, a lower platen 6 is disposed above the furnace lid 4, and a through hole 6a that penetrates vertically is formed in the lower platen 6 at a position opposite to the stalk tube 5. A porous stalk tube 7 having a flange at its lower end is attached to the through hole 6a by passing through it.
該ポーラスストーク管７はストーク管５と同心
しかつシール材８を介してストーク管５に連通接
続されている。そして、ポーラスストーク管７
は、通気性を有しかつ上面レベルが下プラテン６
のそれより若干低く、さらに、内径がストーク管
５のそれとほぼ同一寸法になつている。また、貫
通孔６ａの内面には環状溝９が形成されており、
該環状溝９は連通孔１０を介して下プラテン６の
外側面に連通している。１１はアルゴンガス、窒
素ガス等の不活性ガスを発生させる不活性ガス発
生源であり、該不活性ガス発生源１１は減圧弁１
２、サージタンク１３、流量調製弁１４および電
磁開閉弁１５を順に介して連通孔１０に接続され
ている。また、下プラテン６上には注湯口１６を
有する下金型１７が取り付けられており、該注湯
口１６はシール材１８を介してポーラスストーク
管７に接続されている。また前記炉蓋４には不活
性ガスの供給口１９が穿設されており、該供給口
１９は不活性ガス等の加圧気体源に連通接続され
ている。２０は昇降可能に配設されかつ上金型２
１を取り付けた上プラテンである。 The porous stalk tube 7 is concentric with the stalk tube 5 and is communicatively connected to the stalk tube 5 via a sealing material 8 . And porous stalk tube 7
has air permeability and whose upper surface level is lower than the lower platen 6.
Furthermore, the inner diameter is approximately the same as that of the stalk tube 5. Further, an annular groove 9 is formed on the inner surface of the through hole 6a,
The annular groove 9 communicates with the outer surface of the lower platen 6 via a communication hole 10. 11 is an inert gas generation source that generates an inert gas such as argon gas or nitrogen gas, and the inert gas generation source 11 is connected to the pressure reducing valve 1.
2, is connected to the communication hole 10 via a surge tank 13, a flow rate adjustment valve 14, and an electromagnetic on-off valve 15 in this order. Further, a lower mold 17 having a pouring port 16 is mounted on the lower platen 6, and the pouring port 16 is connected to the porous stalk pipe 7 via a sealing material 18. Further, the furnace lid 4 is provided with an inert gas supply port 19, and the supply port 19 is connected to a pressurized gas source such as an inert gas. 20 is disposed so as to be movable up and down, and the upper mold 2
This is the upper platen with 1 attached.
（考案の作用）
次にこのように構成された装置の作用について
説明する。図示する状態から上・下金型２１，１
７内に溶湯Ｍを注入するに先だち、まず、電磁開
閉弁１５を開いてサージタンク１３内の不活性ガ
スを貫通孔１０を通して環状溝９内に供給する。
すると、供給された不活性ガスはポーラスストー
ク管７の胴部を貫流してポーラスストーク管７内
に入り、ポーラスストーク管７内に入つた不活性
ガスは空気よりも重いため下降してストーク管５
内の溶湯の上面を被うとともにその溶湯上の空気
を排除してストーク管５内に溜まる。次いで、電
磁開閉弁１５を閉じるとともに、供給口１９から
保持炉２内に加圧気体を供給して保持炉２内の溶
湯Ｍを押圧すると、当該溶湯Ｍはストーク管５お
よびポーラスストーク管７内を順に上昇され、か
つ溶湯Ｍの上昇に伴つてストーク管５，７および
上・下金型２１，１７内の空気および不活性ガス
が上・下金型２１，１７間の隙間から排出され、
やがて上・下金型２１，１７内に溶湯Ｍが充填さ
れ加圧される。溶湯Ｍの充填加圧が完了し、上・
下金型２１，１７内の溶湯Ｍが所定状態に凝固し
た後、保持炉２内から加圧気体を排出してストー
ク管５およびポーラスストーク管７内の溶湯Ｍを
下降せしめ、その後、前記と同様にして不活性ガ
スが環状溝９内に供給され通常の低圧鋳造工程を
行つて１サイクルを終了する。(Operation of the device) Next, the operation of the device configured as described above will be explained. Upper and lower molds 21, 1 from the state shown in the figure
Prior to injecting the molten metal M into the annular groove 9 , the electromagnetic on-off valve 15 is first opened to supply inert gas from the surge tank 13 into the annular groove 9 through the through hole 10 .
Then, the supplied inert gas flows through the body of the porous stalk tube 7 and enters the porous stalk tube 7, and since the inert gas that entered the porous stalk tube 7 is heavier than air, it descends into the stalk tube. 5
It covers the upper surface of the molten metal in the stoke tube 5 and removes the air above the molten metal to accumulate in the stalk pipe 5. Next, when the electromagnetic on-off valve 15 is closed and pressurized gas is supplied into the holding furnace 2 from the supply port 19 to press the molten metal M in the holding furnace 2, the molten metal M flows into the stalk pipe 5 and the porous stalk pipe 7. and as the molten metal M rises, the air and inert gas in the stalk pipes 5, 7 and the upper and lower molds 21, 17 are discharged from the gap between the upper and lower molds 21, 17,
Eventually, the upper and lower molds 21 and 17 are filled with molten metal M and pressurized. Filling and pressurizing the molten metal M is completed, and the upper
After the molten metal M in the lower molds 21 and 17 has solidified to a predetermined state, pressurized gas is discharged from the holding furnace 2 to lower the molten metal M in the stalk tube 5 and the porous stalk tube 7, and then the above-mentioned process is performed. Similarly, inert gas is supplied into the annular groove 9 and a normal low pressure casting process is carried out to complete one cycle.
（考案の効果）
以上の説明からも明らかなように、本考案は保
持炉２の炉蓋４に垂設したストーク管７の上端開
口部と、下金型１７の注湯口１６とをシール材
８、ポーラスストーク管７およびシール材１８を
介して連通接続し、さらに、前記ポーラスストー
ク管７の外周面に不活性ガス発生源を電磁開閉弁
１５を介して連通接続したから、溶湯の加圧状態
を解除した後直ちにポーラスストーク管７の外周
面からポーラスストーク管７内に不活性ガスを貫
流させてストーク管７内の溶湯の上面を不活性ガ
スで被うことができるため、ストーク管７内の溶
湯の表面に酸化物が生じるのを防止できるように
なり、欠陥鋳物の誘発の阻止が可能になるなどの
優れた実用的効果を奏する。(Effect of the invention) As is clear from the above explanation, the present invention seals the upper end opening of the stalk pipe 7 vertically installed on the furnace lid 4 of the holding furnace 2 and the pouring port 16 of the lower mold 17. 8. Since the porous stalk pipe 7 and the sealing material 18 are connected to each other, and an inert gas generation source is connected to the outer peripheral surface of the porous stalk pipe 7 through the electromagnetic on-off valve 15, the molten metal is pressurized. Immediately after the state is released, the inert gas can flow from the outer peripheral surface of the porous stalk tube 7 into the porous stalk tube 7 to cover the upper surface of the molten metal in the stalk tube 7 with the inert gas. It is possible to prevent the formation of oxides on the surface of the molten metal inside the mold, and it has excellent practical effects such as making it possible to prevent the occurrence of defective castings.
図面は本考案の一実施例を示す縦断面図であ
る。
２……保持炉、４……炉蓋、５……ストーク
管、６……下プラテン、８，１８……シール材、
１１……不活性ガス発生源、１５……電磁開閉
弁、１６……注湯口、１７……下金型。
The drawing is a longitudinal sectional view showing an embodiment of the present invention. 2...Holding furnace, 4...Furnace lid, 5...Stoke pipe, 6...Lower platen, 8, 18...Sealing material,
11... Inert gas generation source, 15... Solenoid on-off valve, 16... Pouring spout, 17... Lower mold.
Claims (1)
蓋４を上下に貫通させてストーク管５を垂設し、
前記炉蓋４の上方に下プラテン６を配設し、該下
プラテン６に通気性を有するポーラスストーク管
７を下プラテン６を上下に貫通させて取り付け、
該ポーラスストーク管７をシール材８を介在させ
て前記ストーク管５と連通接続し、前記ポーラス
ストーク管７の外周面を不活性ガス発生源１１に
電磁開閉弁１５を介して連通接続し、前記下プラ
テン６上に下金型１７を取り付け、該下金型１７
の注湯口１６をシール材１８を介して前記ポーラ
スストーク管７に連通させたことを特徴とする低
圧鋳造機。 A furnace lid 4 is placed airtightly on a holding furnace 2, and a stalk pipe 5 is installed vertically through the furnace lid 4.
A lower platen 6 is disposed above the furnace lid 4, and a porous stalk tube 7 having ventilation is attached to the lower platen 6 by vertically penetrating the lower platen 6.
The porous stalk tube 7 is connected to the stalk tube 5 through a sealing material 8, and the outer peripheral surface of the porous stalk tube 7 is connected to the inert gas generation source 11 through an electromagnetic shutoff valve 15. A lower mold 17 is installed on the lower platen 6, and the lower mold 17 is
A low-pressure casting machine characterized in that a pouring port 16 is communicated with the porous stalk pipe 7 via a sealing material 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19226986U JPH0244924Y2 (en) | 1986-12-12 | 1986-12-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19226986U JPH0244924Y2 (en) | 1986-12-12 | 1986-12-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63101156U JPS63101156U (en) | 1988-07-01 |
| JPH0244924Y2 true JPH0244924Y2 (en) | 1990-11-28 |
Family
ID=31147189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19226986U Expired JPH0244924Y2 (en) | 1986-12-12 | 1986-12-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0244924Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2024157937A (en) * | 2023-04-26 | 2024-11-08 | 株式会社デンソー | Oxygen barrier equipment and casting equipment |
-
1986
- 1986-12-12 JP JP19226986U patent/JPH0244924Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63101156U (en) | 1988-07-01 |
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