JPH06122065A - Chemical removal method for molding material and device therefor - Google Patents
Chemical removal method for molding material and device thereforInfo
- Publication number
- JPH06122065A JPH06122065A JP30034692A JP30034692A JPH06122065A JP H06122065 A JPH06122065 A JP H06122065A JP 30034692 A JP30034692 A JP 30034692A JP 30034692 A JP30034692 A JP 30034692A JP H06122065 A JPH06122065 A JP H06122065A
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- Prior art keywords
- aqueous solution
- container
- vessel
- alkaline soln
- effect
- Prior art date
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Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、特に精密鋳造による鋳
造品の鋳造後、鋳造製品部分に内包された中子または該
製品に付着した砂等の鋳造品に伴われた鋳型材の一部の
化学的除去方法およびそれに用いる装置に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to a part of a molding material that is accompanied by a core such as a core enclosed in a cast product portion or sand attached to the cast product after casting the cast product by precision casting. And a device used therefor.
【0002】[0002]
【従来の技術】一般に精密鋳造する際の鋳型は、主に珪
酸質の耐火物から成っており、鋳型に溶湯を鋳造して凝
固させた後、鋳造品に付着した耐火物を除去する方法と
して、振動その他による型バラシを行った後、ブラスト
処理等の物理的な処理により除去する方法が一般に用い
られている。ブラスト処理は一般に多くの工数を要し、
また、製品の表面品質等の要求からブラスト処理が適用
出来ないものや、ブラスト処理では除去困難な複雑な形
状または中子を有するものがある。ブラスト処理が適用
できない鋳造品の処理は苛性ソーダを400〜500℃
に加熱、溶融させた融液中に浸漬して中子材等の鋳型材
を溶解して除去する溶融アルカリ浸漬法が行われてい
る。また、特公昭51−39626号は、アルカリ水溶
液で第一次的砂落としを行った後、細部の砂落としには
前記のごとき溶融アルカリ法を用い、処理効率を向上さ
せる方法を提案している。2. Description of the Related Art Generally, a mold for precision casting is mainly made of a silicic refractory material. As a method for removing the refractory material adhered to the casting product after the molten metal is cast and solidified in the mold. Generally, a method of removing the shape by a physical treatment such as a blast treatment after performing mold separation due to vibration or the like is used. Blasting generally requires a lot of man-hours,
In addition, there are those that cannot be applied with the blast treatment due to requirements such as the surface quality of products, and those that have complicated shapes or cores that are difficult to remove by the blast treatment. Casting products that cannot be blasted are treated with caustic soda at 400 to 500 ° C.
A molten alkali dipping method is used in which a mold material such as a core material is dissolved and removed by immersing in a melt that is heated and melted. Further, Japanese Patent Publication No. 51-39626 proposes a method of improving the treatment efficiency by performing the primary sand removal with an alkaline aqueous solution and then using the molten alkali method as described above for the detailed sand removal. .
【0003】[0003]
【発明が解決しようとする課題】しかしながら、従来の
溶融アルカリ浸漬法では珪酸分の多い砂では砂落とし
(鋳型除去)が比較的容易であるものの、ジルコン質ま
たはアルミナ質のように耐アルカリ性の耐火物について
は、砂落としが非常に困難で、また、貫通していない
穴、つまり止まり穴を有する製品および複雑な形状の鋳
造品の鋳型除去については、処理効率が低く、また、場
合によっては鋳造品表面が腐食される。またこの方法は
劇物である苛性ソーダを高温溶融状態で扱うものである
ため、作業環境の悪化、人体、設備等への悪影響が危惧
されており、従来より作業環境改善が強く求められてい
た。また、前記溶融アルカリ浸漬法は銅または銅合金の
鋳造品の場合には、鋳造品表面への侵食が考えられるた
め適用されず、ブラスト処理等により、砂落としが行わ
れていたが、この場合砂落としに多大な工数を必要とす
るとともに、適用製品にある程度の制約があるなど前述
の欠点がある。本発明は、アルミナ、ジルコン等の耐ア
ルカリ性耐火物や、銅合金材についても有効で、かつ工
数低減をもたらす鋳型材の化学的除去方法およびそれに
最適の装置を提供することを目的とする。However, in the conventional molten alkali dipping method, although sand removal (mold removal) is relatively easy with sand containing a large amount of silicic acid, it is difficult to use a fire resistant alkali-resistant material such as zircon or alumina. For objects, it is very difficult to remove sand, and the process efficiency is low and, in some cases, casting is difficult for mold removal of products with non-penetrating holes, that is, blind holes and castings with complicated shapes. The product surface is corroded. In addition, since this method handles caustic soda, which is a deleterious substance, in a high-temperature molten state, it is feared that the working environment will be deteriorated and the human body and equipment will be adversely affected. Therefore, improvement of the working environment has been strongly demanded from the past. Further, the molten alkali dipping method is not applied in the case of cast products of copper or copper alloys because corrosion of the cast product surface is considered, and sand removal was performed by blast treatment or the like. There are the above-mentioned drawbacks such as a large number of man-hours required for sand removal, and some restrictions on applied products. It is an object of the present invention to provide a method for chemically removing a template material which is effective for an alkali resistant refractory material such as alumina and zircon and a copper alloy material, and which reduces the number of steps, and an apparatus optimal for the method.
【0004】[0004]
【課題を解決するための手段】上記問題を解決するため
に、本発明は鋳造品をアルカリ水溶液に浸漬し、これを
密閉容器内で加熱し、加圧することにより、砂落ち性向
上および銅合金への適用が可能になることを見出し本発
明を完成するに至った。In order to solve the above problems, the present invention immerses a cast product in an alkaline aqueous solution, heats it in a closed container, and pressurizes it to improve the ability to remove sand and copper alloy. The inventors have found that it can be applied to, and completed the present invention.
【0005】すなわち、本発明は、鋳型材の一部を伴っ
た鋳造品を密閉容器内で大気圧下での沸点以上に保持し
た苛性ソーダや苛性カリ等のアルカリ水溶液中に浸漬す
ることを特徴とする鋳型材の化学的除去方法である。本
発明において水溶液の加熱と、発生した水蒸気の冷却に
よる凝縮により、アルカリ水溶液を特に間欠的に沸騰さ
せることが望ましい。また、本願の第2発明は、大気圧
から遮断できる蓋付きの容器、それに収容したアルカリ
水溶液を加熱する加熱手段と、発生した水蒸気を冷却し
て凝縮させる冷却手段からなる鋳型材の化学的除去装置
である。That is, the present invention is characterized in that a cast product with a part of a mold material is immersed in an alkaline aqueous solution such as caustic soda or caustic potash, which is kept at a boiling point or higher under atmospheric pressure in a closed container. This is a method of chemically removing the template material. In the present invention, it is desirable to boil the alkaline aqueous solution particularly intermittently by heating the aqueous solution and condensing the generated steam by cooling. Further, the second invention of the present application is a chemical removal of the template material comprising a container with a lid capable of blocking atmospheric pressure, heating means for heating the alkaline aqueous solution contained therein, and cooling means for cooling and condensing the generated water vapor. It is a device.
【0006】[0006]
【作用】本願の方法発明は、鋳型材中のバインダとして
用いられたコロイダルシリカ分に対するアルカリ水溶液
の溶解作用に着目し、密閉容器を用いて沸騰を防止する
ことにより、アルカリ水溶液の温度を高め、これにより
この溶解作用を高めんとするものである。この効果によ
り、例えば、30wt%苛性ソーダ水溶液の場合1.5kg
f/cm2以上の飽和温度(沸騰温度)、または、同様の水
溶液で40wt%の場合1.3kgf/cm2以上の飽和温度
で、それぞれ鋳造品に随伴された鋳型の付着物を100
%除去することができる。また、本発明で用いるアルカ
リ水溶液は、溶融アルカリに比べ表面張力および粘性が
小さいため、中子部や止まり穴の奥部まで浸透拡散して
鋳型および中子材の溶解を促進する。また、本発明の望
ましい実施態様として水溶液を沸騰させる場合は、恐ら
く沸騰による音波振動により、さらに望ましくは、この
沸騰を間欠的、つまり水溶液を加熱して高温にした後該
溶液と共存する水蒸気を冷却又は放出して容器内を減圧
し、水溶液を沸騰させるサイクルを繰り返すことによ
り、鋳型材の除去作用が促進される。この間欠沸騰によ
る効果は、鋳型材と鋳造金属との界面に浸透した、アル
カリ水溶液がその部分で気体化するときの体積膨張によ
り、鋳型材を物理的に剥離する効果が加わる為である。
上記の間欠沸騰は、特に中子部や止まり穴に対しては、
その奥部まで新鮮なアルカリ水溶液を供給すること、お
よび該部でのアルカリ水溶液の多量の水蒸気の発生によ
る物理的圧力による剥離作用が有効に働く。本発明の方
法は銅材および銅合金の鋳造品に適用すれば、表面を侵
食することがないので有効な手段である。本発明の装置
は以上の間欠沸騰を効果的に行うべく構成されたもので
ある。この構成のうち、加熱手段は容器の液面レベル下
の内側または外側に設けた電熱式または蒸気による間接
加熱が有効である。一方、容器内の液面以上の部分に冷
却水を貫流させるパイプやフィンなどの蒸気冷却手段を
設けることで、蒸発するアルカリを含む水蒸気を凝縮
し、容器内を減圧するという作用が期待できる。この手
段は容器内の水蒸気を外部に放出して環境悪化を招くこ
となく、容器内を減圧する手段として有効である。冷却
の結果生じた凝縮水は容器内に戻り、容器内水溶液の濃
度を一定に保つことが可能である。この加熱と冷却は、
この順に1回づつまたは交互に繰り返すのがよいとされ
る。The method invention of the present application focuses on the dissolving action of the alkaline aqueous solution with respect to the colloidal silica component used as the binder in the mold material, and prevents boiling by using a closed container to raise the temperature of the alkaline aqueous solution. This enhances this dissolving action. Due to this effect, for example, 1.5 kg for a 30 wt% caustic soda solution
At a saturation temperature (boiling temperature) of f / cm 2 or higher, or at a saturation temperature of 1.3 kgf / cm 2 or higher in the case of 40 wt% with the same aqueous solution, 100% of the deposits of the molds associated with the castings are obtained.
% Can be removed. Further, since the alkaline aqueous solution used in the present invention has smaller surface tension and viscosity than molten alkali, it permeates and diffuses into the core portion and the inner part of the blind hole to promote dissolution of the template and core material. Further, when the aqueous solution is boiled as a preferred embodiment of the present invention, it is likely that the sound wave vibration caused by boiling causes the boiling to be intermittent, that is, the water vapor coexisting with the solution is heated after the aqueous solution is heated to a high temperature. By repeating the cycle of cooling or discharging to reduce the pressure in the container and boiling the aqueous solution, the action of removing the template material is promoted. The effect of this intermittent boiling is that the effect of physically exfoliating the mold material is added due to the volume expansion when the alkaline aqueous solution that permeates the interface between the mold material and the cast metal vaporizes at that portion.
The intermittent boiling mentioned above, especially for the core and blind holes,
Supplying a fresh alkaline aqueous solution to the inner part and effectively peeling action by physical pressure due to generation of a large amount of water vapor of the alkaline aqueous solution in the part. The method of the present invention is an effective means when applied to cast products of copper materials and copper alloys because it does not corrode the surface. The apparatus of the present invention is configured to effectively perform the above intermittent boiling. In this configuration, as the heating means, it is effective to use electric heating provided inside or outside the liquid level of the container or indirect heating by steam. On the other hand, by providing a vapor cooling means such as a pipe or a fin that allows cooling water to flow through at a portion above the liquid level in the container, it is expected that the vapor containing the vaporized alkali is condensed and the pressure in the container is reduced. This means is effective as a means for depressurizing the inside of the container without releasing the water vapor in the container to the outside and deteriorating the environment. Condensed water generated as a result of cooling returns to the container, and the concentration of the aqueous solution in the container can be kept constant. This heating and cooling is
It is recommended that this order be repeated once or alternately.
【0007】[0007]
【実施例】以下本発明を実施例に基づき説明する。EXAMPLES The present invention will be described below based on examples.
【0008】(実施例1)シリカ分50%、残部ジルコ
ンおよびアルミナから成るバインダとして、コロイダル
シリカを用いて焼成した精密鋳造鋳型にSCM415を
鋳造した鋳造品を、振動により型バラシを行ったものを
供試材とした。処理液は10、20、30、40、50
wt%と濃度を変えた苛性ソーダ水溶液とし、所定量の供
試材を浸漬した後に容器を、大気圧に解放したままのも
の(10kgf/cm2)、および蓋をして大気と遮断して内
圧を1.2、1.3、1.5、2.0、3.0、5.
0、8.0、kgf/cm2に保持するごとく加熱を制御して
1時間浸漬保持したものを比較した。型バラシままの供
試材の鋳型材付着量の平均値に対する本処理により除去
された鋳型材の重量比をそれぞれ求めて評価を行った。
その結果を表1に示す。(Example 1) A casting obtained by casting SCM415 in a precision casting mold fired using colloidal silica as a binder composed of silica content of 50% and the balance of zircon and alumina, and subjecting the cast product to vibration-induced mold separation. It was used as a test material. Treatment liquid is 10, 20, 30, 40, 50
An aqueous solution of caustic soda with a different concentration of wt% was soaked, and the container was left open to atmospheric pressure (10 kgf / cm 2 ) after immersing a specified amount of the test material, and the internal pressure was obtained by covering the container with the atmosphere. 1.2, 1.3, 1.5, 2.0, 3.0, 5.
Heating was controlled so that the temperature was maintained at 0, 8.0, and kgf / cm 2, and the samples were immersed and held for 1 hour for comparison. The weight ratio of the mold material removed by this treatment to the average value of the amount of the mold material adhered to the test material with the molds left unmolded was obtained and evaluated.
The results are shown in Table 1.
【0009】[0009]
【表1】 [Table 1]
【0010】表から、一定温度の場合、保持圧力を高く
(高温化)する程除去重量比が高くなること、つまり本
発明の効果が大きいことが判る。また、圧力一定の場
合、高濃度化する程除去重量比が高くなることが判る。
この実施例の場合、(沸騰を行わない場合)圧力1.3
kgf/cm2以上でかつ濃度が30wt%以上であれば鋳型は
ほぼ完全に溶出、除去され、1.3kgf/cm2で30wt%
場合のみはその後簡単なサンドブラスト処理等を併用す
ることにより良好な鋳造品を得ることができた。From the table, it can be seen that at a constant temperature, the higher the holding pressure (higher temperature), the higher the removal weight ratio, that is, the effect of the present invention is great. Further, it can be seen that when the pressure is constant, the higher the concentration, the higher the removal weight ratio.
In the case of this example, a pressure of 1.3 (without boiling)
If it is more than kgf / cm 2 and the concentration is more than 30wt%, the template is almost completely eluted and removed, and it is 30wt% at 1.3kgf / cm 2.
Only in such a case, a good cast product could be obtained by using a simple sandblasting treatment together thereafter.
【0011】(実施例2)実施例1と同じ鋳型材を用い
て、SUS304で鋳造した止まり穴を有する複雑形状
を有する鋳造品を供試材とし、30wt%苛性カリ水溶液
に浸漬し、実施例1と同様にして内圧を2.0kgf/cm2
まで昇圧するごとく加熱した。図1に示す加圧タンク内
上部の冷却コイルに3分間冷却水を通水した後、2分間
で元の圧力に上昇するごとく加熱し、通水を繰り返して
1時間保持した。その結果鋳型材は止まり穴も含めて全
て溶出、除去された。しかし内圧を2.0kgf/cm2に保
持したまま1時間経過したものについては、約30wt%
の鋳型砂が残存した。なお、通常溶融苛性ソーダで砂落
とし処理を行うと、強固な酸化スケールが付着するが、
本発明によれば、低温、低濃度であるため、酸化スケー
ルの付着は、認められなかった。(Example 2) Using the same mold material as in Example 1, a casting having a complicated shape having a blind hole, which was cast by SUS304, was used as a test material and immersed in an aqueous 30 wt% caustic potash solution. The internal pressure is 2.0kgf / cm 2 in the same manner as
It was heated as the pressure was increased to. Cooling water was passed through the cooling coil in the upper part of the pressurizing tank shown in FIG. 1 for 3 minutes, and then heated so that the original pressure was increased in 2 minutes, and the water was repeatedly passed and held for 1 hour. As a result, the mold material was completely eluted and removed including the blind holes. However, about 30% by weight is obtained for 1 hour after keeping the internal pressure at 2.0 kgf / cm 2.
Mold sand remained. In addition, when sand is removed with molten caustic soda, strong oxide scale adheres,
According to the present invention, since the temperature was low and the concentration was low, the adhesion of oxide scale was not observed.
【0012】(実施例3)実施例1と同じ鋳型材を用い
て、HBSC2(高力黄銅鋳物第2種)を鋳造した鋳造品
を供試材とした。これを溶融苛性ソーダで砂落とし処理
を行うと、表層から約1mmの深さで酸化スケール層が認
められ、表面肌が荒れてしまうが、実施例2の処理液お
よび条件で行うことにより、良好な表面肌を有する鋳造
品を得ることができた。(Example 3) Using the same mold material as in Example 1, a cast product obtained by casting HBSC2 (high-strength brass casting type 2) was used as a test material. When this is subjected to sand removal treatment with molten caustic soda, an oxide scale layer is recognized at a depth of about 1 mm from the surface layer, and the surface skin becomes rough. However, when the treatment liquid and conditions of Example 2 are used, good results are obtained. A cast product having a surface skin could be obtained.
【0013】次に本発明の装置の実施例について述べ
る。図1は小物精密鋳造品用に製作した本発明の装置の
1実施例の半断面図とした立面図である。密閉容器1に
は、アルカリ水溶液2の液面下の外周面に発熱体3を取
付けるとともに保温層8が施されている。該密閉容器1
には、ヒンジおよび蓋開閉装置5を介して蓋6が密閉容
器1に対して気密保持できる様に設けられている。該蓋
6の中央内部には冷却水をパイプ4′、4″を介して送
入、排出される蛇管である蒸気冷却手段4が設けられ、
該蒸気冷却手段は蓋6を開放したときは、密閉容器1へ
の被処理物の装入、排出に支障なく、かつ、蓋を密閉中
は、液面上の水蒸気滞留部分に位置し、水蒸気のみを、
冷却して凝縮する位置とされている。なお7は空気逃が
し弁である。加熱、冷却の制御は、密閉容器1に設けた
温度調節計により、発熱体のON−OFF、冷却水の供
給を制御するものである。被処理物は専用のバスケット
に収容して、該バスケットをホイスト等で操作すること
により行う。なお9は作業床であるプラットホームであ
る。Next, an embodiment of the device of the present invention will be described. FIG. 1 is a half sectional elevation view of an embodiment of the apparatus of the present invention manufactured for small precision castings. In the closed container 1, the heating element 3 is attached to the outer peripheral surface below the liquid surface of the alkaline aqueous solution 2, and the heat insulating layer 8 is provided. The closed container 1
Is provided with a lid and a lid opening / closing device 5 so that the lid 6 can be airtightly held in the closed container 1. Inside the center of the lid 6, there is provided a steam cooling means 4 which is a flexible pipe for feeding and discharging cooling water through pipes 4 ′ and 4 ″.
When the lid 6 is opened, the vapor cooling means does not hinder loading and discharging of the object to be treated in the closed container 1, and while the lid is closed, the vapor cooling means is located in the water vapor retention portion on the liquid surface. Only
It is positioned to cool and condense. Reference numeral 7 is an air relief valve. The heating and cooling are controlled by turning on / off the heating element and supplying cooling water by a temperature controller provided in the closed container 1. The object to be processed is housed in a dedicated basket, and the basket is operated by a hoist or the like. Reference numeral 9 is a platform which is a work floor.
【0014】[0014]
【発明の効果】以上述べた様に本願の方法発明はシリカ
系のみならずアルミナ、ジルコン系耐火物による鋳型に
ついても、また特に中子や止まり穴の奥部について、高
い鋳型材除去効果を有し、低工数処理を可能とするもの
である。また同時に処理環境の改善効果もある。また、
従来のアルカリ水溶液では不可能であった銅合金への適
応が可能となり、酸化スケールの生成もなく、精密鋳造
品の量産仕上げ工程に極めて有効である。また本願の装
置は、本願の方法発明のうち特に間欠的沸騰を効果的に
行うよう構成されたもので、密閉容器自体に加熱および
水蒸気冷却の手段を設けたので、水蒸気放出による、室
内環境汚染がなく、かつ装置全体をコンパクトに構成す
ることができる。As described above, the method invention of the present invention has a high effect of removing the mold material not only for the silica-based mold but also for the mold made of alumina or zircon-based refractory, and particularly for the core and the inner part of the blind hole. However, low man-hour processing is possible. At the same time, it has the effect of improving the processing environment. Also,
It can be applied to copper alloys, which was not possible with conventional alkaline aqueous solutions, and it is extremely effective in the mass production finishing process of precision castings without the formation of oxide scale. In addition, the apparatus of the present application is particularly configured to effectively perform intermittent boiling among the method inventions of the present application, and since the closed container itself is provided with heating and steam cooling means, indoor environment pollution due to steam release is caused. In addition, the entire apparatus can be made compact.
【図1】本発明の装置の実施例を半断面図とした立面図
である。FIG. 1 is an elevational view showing an embodiment of a device of the present invention as a half sectional view.
1 密閉容器 2 アルカリ水溶液 3 発熱体 4 蒸気冷却手段 4′パイプ 4″パイプ 5 蓋開閉装置 6 蓋 7 空気逃がし弁 8 保温層 9 プラットホーム 1 Airtight container 2 Alkaline aqueous solution 3 Heating element 4 Steam cooling means 4'pipe 4 ″ pipe 5 Lid opening / closing device 6 Lid 7 Air release valve 8 Heat insulation layer 9 Platform
Claims (3)
器内で大気圧下の沸点以上の温度に保持したアルカリ水
溶液に浸漬することを特徴とする鋳型材の化学的除去方
法。1. A method for chemically removing a casting material, which comprises immersing a cast product with a portion of the casting material in an aqueous alkaline solution which is kept at a temperature of at least the boiling point under atmospheric pressure in a closed container.
水溶液を沸騰させることを特徴とする請求項1の鋳型材
の化学的除去方法。2. The method for chemically removing a template material according to claim 1, wherein the alkaline aqueous solution is boiled by reducing the pressurizing pressure.
を大気から遮断して収容する容器、該容器に設けられて
前記水溶液を加熱する加熱手段、および前記容器内の前
記液面以上の部分に冷却水を還流させる冷却手段が設け
られた蒸気冷却手段から成ることを特徴とする鋳型材の
化学的除去装置。3. A container for accommodating an alkaline aqueous solution in which a product to be treated is immersed so as to be shielded from the atmosphere, a heating means provided in the container for heating the aqueous solution, and a portion above the liquid surface in the container. A chemical removing device for a casting material, comprising a vapor cooling means provided with a cooling means for circulating cooling water.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30034692A JPH06122065A (en) | 1992-10-13 | 1992-10-13 | Chemical removal method for molding material and device therefor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30034692A JPH06122065A (en) | 1992-10-13 | 1992-10-13 | Chemical removal method for molding material and device therefor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06122065A true JPH06122065A (en) | 1994-05-06 |
Family
ID=17883677
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP30034692A Pending JPH06122065A (en) | 1992-10-13 | 1992-10-13 | Chemical removal method for molding material and device therefor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06122065A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102921935A (en) * | 2012-11-29 | 2013-02-13 | 吴耀祖 | Method for clearing residual casting sand on casting surface |
CN106583695A (en) * | 2015-10-14 | 2017-04-26 | 沈阳铸造研究所 | High-temperature high-pressure core-removing device and core-removing method for alumina-based ceramic core |
CN107855503A (en) * | 2017-10-31 | 2018-03-30 | 西安交通大学 | A kind of depoling equipment that alumina based ceramic core removing speed is improved by airflow stirring |
-
1992
- 1992-10-13 JP JP30034692A patent/JPH06122065A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102921935A (en) * | 2012-11-29 | 2013-02-13 | 吴耀祖 | Method for clearing residual casting sand on casting surface |
CN106583695A (en) * | 2015-10-14 | 2017-04-26 | 沈阳铸造研究所 | High-temperature high-pressure core-removing device and core-removing method for alumina-based ceramic core |
CN106583695B (en) * | 2015-10-14 | 2018-10-02 | 沈阳铸造研究所有限公司 | A kind of alumina based ceramic core high temperature and pressure core-removing device and depoling method |
CN107855503A (en) * | 2017-10-31 | 2018-03-30 | 西安交通大学 | A kind of depoling equipment that alumina based ceramic core removing speed is improved by airflow stirring |
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