JPH04200858A - Gas injecting device for holding furnace - Google Patents
Gas injecting device for holding furnaceInfo
- Publication number
- JPH04200858A JPH04200858A JP33668090A JP33668090A JPH04200858A JP H04200858 A JPH04200858 A JP H04200858A JP 33668090 A JP33668090 A JP 33668090A JP 33668090 A JP33668090 A JP 33668090A JP H04200858 A JPH04200858 A JP H04200858A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- holding furnace
- gas
- injecting pipe
- blowing
- 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
- 239000002184 metal Substances 0.000 claims abstract description 74
- 239000007789 gas Substances 0.000 claims abstract description 42
- 239000011261 inert gas Substances 0.000 claims abstract description 16
- 238000007664 blowing Methods 0.000 claims description 44
- 238000005266 casting Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 9
- 239000001301 oxygen Substances 0.000 abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 abstract description 9
- 238000009423 ventilation Methods 0.000 abstract 2
- 230000002779 inactivation Effects 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229940123973 Oxygen scavenger Drugs 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、低圧鋳造方法における保持炉用ガス吹き込
み装置および保持炉−・のガス吹き込み方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a gas blowing device for a holding furnace and a method for blowing gas into a holding furnace in a low pressure casting method.
溶湯中に酸素ガスが含まれろと鋳造製品にブＵｌ−ホー
ル等の鋳造欠陥がヰしやすい。If oxygen gas is contained in the molten metal, casting defects such as holes are likely to occur in the cast product.
このため、従来の低圧鋳造方法においては、保持炉の溶
湯を高温にしたり、溶湯中に脱酸素剤を配合して溶湯中
の酸素を除去していた。For this reason, in conventional low-pressure casting methods, oxygen in the molten metal has been removed by raising the temperature of the molten metal in the holding furnace or adding an oxygen scavenger to the molten metal.
しかしながら、保持炉の溶湯を高温にするには゛装置等
を堅固なものにしなりればならず、また、溶湯中に脱酸
素剤を配合するには手間がかかるため、作業能率が低下
せざるを得ないとい・）各々の不都合を有した。However, in order to raise the temperature of the molten metal in the holding furnace, the equipment must be made more robust, and it takes time and effort to mix an oxygen absorber into the molten metal, which inevitably reduces work efficiency. ) Each had their own disadvantages.
この発明の課題はかかる不都合を解消することである。An object of the present invention is to eliminate such disadvantages.
前記課題を解決するため６，１、この発明に係る保持炉
用ガス吹き込み装置乙こおいては、溶湯保持炉にガス吹
き込み管を設置し、このガス吹き込み管の先端部を前記
溶湯保持炉の底面近傍まで延設したものである。In order to solve the above problems 6.1, in the gas blowing device for a holding furnace according to the present invention, a gas blowing pipe is installed in the molten metal holding furnace, and the tip of the gas blowing pipe is connected to the molten metal holding furnace. It extends to the vicinity of the bottom.
なお、前記ガス吹き込み管における前記溶湯保持炉より
−Ｆ部に溶湯感知センサを設置し、このセンサの作動に
よって前記保持炉内のガス抜きを可能とすることができ
る。In addition, a molten metal sensing sensor may be installed in the gas blowing pipe at a portion -F from the molten metal holding furnace, and the operation of this sensor may enable degassing in the holding furnace.
また、前記課題を達成するために、この発明の保持炉へ
のガス吹き込み方法においては、低圧鋳造連続サイクル
において、予圧前又は溶湯充填後に溶湯保持炉内に不活
性ガスを吹き込むものである。Furthermore, in order to achieve the above object, in the method of blowing gas into a holding furnace of the present invention, an inert gas is blown into the molten metal holding furnace before preloading or after filling the molten metal in a continuous low pressure casting cycle.
この発明に係る保持炉用ガス吹き込み装置は上記のよう
に構成されているため、
保持炉内に溶湯を充填すれば吹き込み管の先端部は溶湯
中に沈む結果、前記吹き込み管から不活性ガスを溶湯中
に吹き込むことができる。この不活性ガスは溶湯中の酸
素と物理吸着して不活性化させる。Since the gas blowing device for a holding furnace according to the present invention is configured as described above, when the holding furnace is filled with molten metal, the tip of the blowing tube sinks into the molten metal, and as a result, the inert gas can be removed from the blowing tube. Can be blown into molten metal. This inert gas physically adsorbs oxygen in the molten metal to inactivate it.
なお、前記ガス吹き込み管における前記溶湯保持炉より
上部に溶湯感知センサを設置し、このセンサの作動によ
って前記保持炉内のガス抜きを可能とすれば、
保持炉内の内圧が過剰になり溶湯が吹き込み管に逆流し
ようとしても、この溶湯を前記溶湯感知センサが感知し
て保持炉内のガス抜きを行うため、保持炉内の内圧は下
降し、この結果、この逆流は防止される。Note that if a molten metal detection sensor is installed above the molten metal holding furnace in the gas blowing pipe, and the operation of this sensor makes it possible to vent the gas in the holding furnace, the internal pressure in the holding furnace becomes excessive and the molten metal flows out. Even if the molten metal tries to flow back into the blowing pipe, the molten metal detection sensor detects this molten metal and vents the gas inside the holding furnace, so the internal pressure inside the holding furnace decreases, and as a result, this backflow is prevented.
また、この発明に係る保持炉へのガス吹き込み方法は上
記のように構成されているため、キャビティ内に不活性
ガスが浸入することはない。Further, since the method for blowing gas into a holding furnace according to the present invention is configured as described above, inert gas does not enter the cavity.
以下、図面に基づいてこの発明の詳細な説明する。 Hereinafter, the present invention will be described in detail based on the drawings.
第１図において、１は保持炉であり、低圧鋳造に使用さ
れる。１１はこの保持炉１の本体である。In FIG. 1, 1 is a holding furnace used for low pressure casting. 11 is the main body of this holding furnace 1.
この本体１１内には溶湯Ｍが充填されている。１２は前
記保持炉１の蓋体である。この蓋体１２で前記本体１１
を覆うごとにより前記保持炉１は密閉される。This main body 11 is filled with molten metal M. 12 is a lid of the holding furnace 1. With this lid body 12, the main body 11
The holding furnace 1 is sealed by covering it.
１１１は加圧孔であり、前記本体１１に形成されている
。この加圧孔１１１は加圧気体を保持炉１内に流入させ
るためのものである。なお、この加圧気体の流入をコン
トロールすることによって前記保持炉１内の内圧を調整
することができる。なお、１３゜１３は前記本体１１に
設置されたヒータであり、保持が１を適温に加熱するた
めのものである。 □２ばダイベースであり、前記保
持炉１の」一方に設置されている。このダイベース２は
鋳型３を支持するためのものである。３１．３２はスト
ークであり、前記蓋体１２を貫通した状態で固定されて
いる。111 is a pressurizing hole, which is formed in the main body 11. This pressurizing hole 111 is for allowing pressurized gas to flow into the holding furnace 1 . Note that the internal pressure within the holding furnace 1 can be adjusted by controlling the inflow of this pressurized gas. Note that 13° 13 is a heater installed in the main body 11, and is used to heat the holding part 1 to an appropriate temperature. □ 2 is a die base, which is installed on one side of the holding furnace 1. This die base 2 is for supporting the mold 3. 31 and 32 are stalks, which are fixed in a state that passes through the lid body 12.
このストーク３Ｌ３２は溶湯Ｍ面に対して略垂直状態に
設置され、その下端は溶湯Ｍ中に沈んでいる。This stalk 3L32 is installed substantially perpendicular to the surface of the molten metal M, and its lower end is sunk into the molten metal M.
又、上端は堰（図示せず）を介して前記鋳型３のキャビ
ティに連通している。このため、加圧孔１１】から加圧
気体を流入さゼることによって保持炉１内の内圧を上界
させれば溶湯Ｍはストーク３１，３２を介して鋳型３の
キャビティ内に充填される。Further, the upper end communicates with the cavity of the mold 3 via a weir (not shown). For this reason, if the internal pressure in the holding furnace 1 is raised by inflowing pressurized gas from the pressurizing hole 11, the molten metal M is filled into the cavity of the mold 3 via the stalks 31 and 32. .
次に、４は不活性ガスを吹き込むためのガス吹き込み管
であり、前記蓋体１２を貫通した状態で固定されている
。このガス吹き込み管４は溶湯Ｍ面に対して略垂直に設
置され、その先端部は本体１１の底面近傍まで延びてい
る。４１はポーラス状の吹き出し具であり、前記吹き込
み管４の先端に連結されている。不活性ガスは吹き込み
管４を介して保持炉１内に流入し、この吹き出し具４１
の細孔から溶湯Ｍ中に拡散していく。そして、溶湯Ｍ中
の酸素と物理吸着し、当該酸素を不活性状態にする。Next, reference numeral 4 denotes a gas blowing pipe for blowing inert gas, and the gas blowing pipe 4 is fixed so as to pass through the lid body 12. This gas blowing pipe 4 is installed substantially perpendicular to the surface of the molten metal M, and its tip extends to the vicinity of the bottom surface of the main body 11. Reference numeral 41 denotes a porous blowing tool, which is connected to the tip of the blowing pipe 4. The inert gas flows into the holding furnace 1 through the blowing pipe 4, and this blowing tool 41
It diffuses into the molten metal M through the pores. Then, it physically adsorbs the oxygen in the molten metal M and makes the oxygen inactive.
第２図において、５は溶湯感知センサであり、前記吹き
込み管４における前記蓋体１２の外側に設置されている
。この溶湯感知センサ５は電位差を応用したものであり
、溶湯Ｍを感知したときにコントロール部５１を作動さ
せて保持炉１のガス抜き弁１４を操作し、保持炉１の内
圧を下降させる。In FIG. 2, reference numeral 5 denotes a molten metal detection sensor, which is installed on the outside of the lid 12 in the blowing pipe 4. The molten metal detection sensor 5 applies a potential difference, and when the molten metal M is sensed, the control unit 51 is activated to operate the gas vent valve 14 of the holding furnace 1 to lower the internal pressure of the holding furnace 1.
よって、保持炉１内の内圧が過剰になり、溶湯Ｍが吹き
込み管４を上昇しても、このセンサ５に接触すれば（仮
想線の図参照）、保持炉１内のガス抜きが行われ、吹き
込み管４を上昇した溶湯Ｍは重力によって下降する。こ
のため、保持炉１内の内圧が＋ｉｌ、 ｊ〜でも吹き込
み管４複介して溶湯Ｍが逆流する、二とばない。Therefore, even if the internal pressure in the holding furnace 1 becomes excessive and the molten metal M rises up the blowing pipe 4, if it comes into contact with this sensor 5 (see the imaginary line diagram), the gas inside the holding furnace 1 will be degassed. , the molten metal M that has ascended through the blowing pipe 4 descends due to gravity. Therefore, even if the internal pressure in the holding furnace 1 is +il, j~, the molten metal M will never flow back through the blowing pipes 4.
この装置４使用して低圧鋳造をする場合、その鋳造・リ
ーイクル（型閉＋Ｉ−１予圧、溶湯充填、加圧、定圧、
洩ｎ、型開放の繰り返し）において、予圧前ヌは溶湯充
填後に溶湯保持炉１内心、＝不活性ガスを吹き込みば、
鋳型３のキャじティ内心に不活性ガスが浸入するのを防
１１−できる。When performing low-pressure casting using this device 4, the casting/recycle (mold closing + I-1 preload, molten metal filling, pressurization, constant pressure,
(repetition of leakage and mold opening), before pre-pressure, after filling the molten metal, the inner part of the molten metal holding furnace 1, = if inert gas is blown,
11- It is possible to prevent inert gas from penetrating into the center of the caster of the mold 3.
この発明６４′、係る保持炉用ガス吹き込み装置は、溶
’ｌＪｈ保持炉にガス吹き込み管を設置し、ごのガス吹
き込み管の先端部を前記溶湯保持炉の底面近傍１こで延
設したため、
保持炉内に溶湯を充填すれば吹き込み管の先端部は溶湯
中に沈む結果、前記吹き込み管から不活性ガスを溶湯中
に吹き込むことができる。この不活性ガス（５：（−溶
湯中の酸素と物理吸着してその不活Ｉ′？Ｆ化する。In this invention 64', the gas blowing device for a holding furnace has a gas blowing pipe installed in the molten metal holding furnace, and the tip of the gas blowing pipe is extended in the vicinity of the bottom of the molten metal holding furnace. When the holding furnace is filled with molten metal, the tip of the blowing tube sinks into the molten metal, so that inert gas can be blown into the molten metal from the blowing tube. This inert gas (5:(-) is physically adsorbed with oxygen in the molten metal and becomes inert I'?F.
よ−、゛（１、この保持炉用ガス吹き込み装置を使用す
れば、従来の加熱装置を使用したまま作業能率を低下さ
せることなく、保持炉における溶湯中の酸素を除去する
ことができる。(1) By using this gas blowing device for a holding furnace, oxygen in the molten metal in the holding furnace can be removed without reducing work efficiency while using a conventional heating device.
なお、前記ガス吹き込み管Ｃコおける前記溶湯保持炉よ
り上部に溶湯感知イー、：／すを設置し、ごのセ：／す
の作動によって前記保持炉内のガス抜きを可能とすれば
、
保持炉内の内圧が過剰になり溶湯が吹き込の管に逆流し
よ・うとしても、この溶湯を前記溶湯感知センサが感知
し一ζ保持炉内のガス抜きを行・）ため、保持炉内の内
圧は下降し、この結果、この逆流は防ｔｌ−されるもの
である。In addition, if a molten metal sensing unit is installed above the molten metal holding furnace in the gas blowing pipe C, and the gas inside the holding furnace is made to be vented by the operation of the molten metal holding furnace. Even if the internal pressure in the furnace becomes excessive and the molten metal tries to flow back into the blowing pipe, the molten metal detection sensor detects this molten metal and degass the holding furnace. The internal pressure of the tube decreases, and as a result, this backflow is prevented.
また、この発明に係る保持炉へのガス吹き込み方法は、
低圧鋳造連続ザイクルにおいて、予圧前又は溶湯充填後
に溶湯保持炉内に不活性ガスを吹き込むものであるため
、
キャビティ内に不活性ガスが浸入することはない。Further, the method for blowing gas into a holding furnace according to the present invention includes:
In the continuous cycle of low-pressure casting, inert gas is blown into the molten metal holding furnace before preloading or after filling the molten metal, so inert gas does not enter the cavity.
よって、この保持炉・＼のガス吹き込み方法を使用すれ
ば、不活性ガスに基づく鋳造欠陥を防止できる。Therefore, by using this holding furnace/\ gas blowing method, casting defects due to inert gas can be prevented.
図面は、二の発明に係る保持炉用ガス吹き込；７）′ｉ
置の実施例を示すものであり、
第１図（、よ断面図、
第２図は第１図における■部の拡大断面図である。
１ ・・・ 溶湯保持炉
４ ・・・ ガス吹き込・ろ管
５ ・・・ 溶湯惑知センリThe drawing shows gas blowing for a holding furnace according to the second invention; 7)'i
Fig. 1 is a cross-sectional view, and Fig. 2 is an enlarged cross-sectional view of part ■ in Fig. 1. 1... Molten metal holding furnace 4... Gas blowing・Filter tube 5... Molten metal intelligence sensor
Claims (3)
ス吹き込み管の先端部を前記溶湯保持炉の底面近傍まで
延設したことを特徴とする保持炉用ガス吹き込み装置。(1) A gas blowing device for a holding furnace, characterized in that a gas blowing pipe is installed in the molten metal holding furnace, and the tip of the gas blowing pipe extends to near the bottom of the molten metal holding furnace.
り上部に溶湯感知センサを設置し、このセンサの作動に
よって前記保持炉内のガス抜きを可能としたことを特徴
とする特許請求の範囲第１項記載の保持炉用ガス吹き込
み装置。(2) A molten metal detection sensor is installed above the molten metal holding furnace in the gas blowing pipe, and the operation of this sensor makes it possible to vent gas in the holding furnace. A gas blowing device for a holding furnace as described in 2.
湯充填後に溶湯保持炉内に不活性ガスを吹き込むことを
特徴とする保持炉へのガス吹き込み方法。(3) A method for blowing gas into a holding furnace, which comprises blowing an inert gas into the molten metal holding furnace before preloading or after filling the molten metal in a continuous low-pressure casting cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2336680A JP3019976B2 (en) | 1990-11-29 | 1990-11-29 | Gas injection device for holding furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2336680A JP3019976B2 (en) | 1990-11-29 | 1990-11-29 | Gas injection device for holding furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04200858A true JPH04200858A (en) | 1992-07-21 |
| JP3019976B2 JP3019976B2 (en) | 2000-03-15 |
Family
ID=18301691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2336680A Expired - Fee Related JP3019976B2 (en) | 1990-11-29 | 1990-11-29 | Gas injection device for holding furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3019976B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005329419A (en) * | 2004-05-18 | 2005-12-02 | Moriyama Giken:Kk | Apparatus and method for forming metal with die casting |
-
1990
- 1990-11-29 JP JP2336680A patent/JP3019976B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005329419A (en) * | 2004-05-18 | 2005-12-02 | Moriyama Giken:Kk | Apparatus and method for forming metal with die casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3019976B2 (en) | 2000-03-15 |
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