JP5093719B2 - Removal method of residual cleaning liquid in organic impregnation seal processing method - Google Patents
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本発明は、金属鋳造品にできる微細孔や鋳巣に樹脂を含浸させ、封孔する有機含浸シール処理法の前処理工程における残留洗浄液の除去方法に関するものである。 The present invention relates to a method for removing a residual cleaning liquid in a pretreatment step of an organic impregnation seal treatment method in which a resin is impregnated into a fine hole or a cast hole formed in a metal casting and sealed.
金属鋳造品の耐圧性、金属強度および加工精度の向上、塗装メッキ処理後のフクレ防止を図る有機含浸シール処理法は、前処理工程で金属ワークの鋳型成型ならびに切削加工時に付着する油脂類、水分、切り粉、汚れ等を中性洗剤液で洗浄を行い、後処理工程の含浸シール装置で微細孔や鋳巣に含浸液を圧入して巣漏れを防止するものである。 The organic impregnation seal treatment method that improves pressure resistance, metal strength and processing accuracy of metal casting products, and prevents blisters after paint plating treatment is the pre-treatment process of molding and cutting of metal workpieces, oils and fats that adhere to moisture In this case, chips, dirt, etc. are washed with a neutral detergent solution, and the impregnating solution is pressed into the micropores or casting cavity by an impregnation sealing device in a post-processing step to prevent nest leakage.
従来より、有機含浸シール処理法における金属鋳造品の微細孔や鋳巣に含浸液を圧入する方法は、浸漬−真空（減圧）法、真空（減圧）−浸漬法、真空（減圧）−浸漬−加圧法が既に公知であり、該手法を用いた含浸液の安定を図る方法や、鋳抜き孔の改善によってより高い巣漏れ現象を防止する含浸シール装置の提案がなされている。 Conventionally, the impregnating liquid is injected into the micropores or casting cavity of a metal casting product in the organic impregnation seal processing method by immersion-vacuum (reduced pressure) method, vacuum (reduced pressure) -immersion method, vacuum (reduced pressure) -immersion- The pressurization method is already known, and a method for stabilizing the impregnating liquid using the method and a suggestion of an impregnation seal device for preventing a higher nest leakage phenomenon by improving the cast hole are proposed.
例えば、含浸液の安定を図る方法としては、クロム酸とリン酸とを混合した濃度液を金属ワークの微細孔や鋳巣に含浸させる「高気密性アルミニウム構造体及びその製造方法」（特許文献１）や、洗浄液に金属キレート化剤を予め添加して含浸液の安定を図る「被含浸ワークの含浸処理方法」（特許文献２）公報などが提案されている。 For example, as a method for stabilizing the impregnating solution, “a highly airtight aluminum structure and a method for producing the same” in which a fine solution or a cast hole of a metal workpiece is impregnated with a concentrated solution in which chromic acid and phosphoric acid are mixed (Patent Document) 1) and “Method of impregnating workpiece to be impregnated” (Patent Document 2) which stabilizes the impregnating solution by adding a metal chelating agent to the cleaning solution in advance are proposed.
また、含浸シール装置の改善を図る方法としては、特定の鋳抜き孔を封止して内部を負圧することにより、鋳造部品にできた鋳巣に含浸液を確実に含浸させる「鋳造品の部分含浸方法」（特許文献３）が提案されている。 In addition, as a method for improving the impregnation seal device, a specific cast hole is sealed and the inside is negatively pressurized, so that the cast hole formed in the cast part is impregnated with the impregnation liquid reliably. An “impregnation method” (Patent Document 3) has been proposed.
しかしながら、上記の提案の何れも含浸シール工程の改善提案であって、含浸シール処理法の前処理工程における微細孔や鋳巣に付着する残留洗浄液を除去する手法を採用するものではなかった。
本発明は、上記問題点に鑑み、金属鋳造品にできる微細孔や鋳巣に含浸させる含浸シール処理法の前処理工程における残留洗浄液の除去を目的とするものである。 The present invention has been made in view of the above-mentioned problems, and an object thereof is to remove a residual cleaning liquid in a pretreatment step of an impregnation seal treatment method in which fine pores or cast holes made into a metal casting are impregnated.
前記目的を達成するため、本発明は、金属鋳造品にできる微細孔や鋳巣に樹脂を注入して封孔する有機含浸シール処理法において、金属ワークを洗浄する洗浄工程と、該洗浄工程で金属ワークの表面に付着した洗浄液を加熱・乾燥する乾燥工程と、該乾燥工程により加熱・乾燥させた金属ワークを加熱された状態のまま真空タンクに投入し、該金属ワークの鋳巣内に浸入した洗浄液を吸引する真空工程と、金属ワークを真空タンクから取り出して常温まで冷却する常温冷却工程と、金属ワークの微細孔及び鋳巣に樹脂を注入する有機含浸処理工程と、から成る有機含浸シール処理法における残留洗浄液の除去方法である。
In order to achieve the above object, the present invention provides a cleaning process for cleaning a metal workpiece in an organic impregnation sealing treatment method in which a resin is injected into a fine hole or a cast hole that can be made into a metal casting product, and the cleaning process. A drying process that heats and dries the cleaning solution adhering to the surface of the metal workpiece, and the metal workpiece that has been heated and dried by the drying process is put into a vacuum tank while being heated, and enters the casting cavity of the metal workpiece. An organic impregnated seal comprising: a vacuum process for sucking the washed liquid, a room temperature cooling process for taking out the metal work from the vacuum tank and cooling it to room temperature, and an organic impregnation treatment process for injecting resin into the fine holes and castings of the metal work It is the removal method of the residual washing | cleaning liquid in a processing method.
本発明にかかる有機含浸シール処理法における残留洗浄液の除去方法によれば、前処理工程に真空工程を設けることによって、微細孔や鋳巣に付着する残留洗浄液をミクロン単位で真空（減圧）除去することができるため、後工程にあたる有機含浸処理工程の含浸液の密着性を高めることになり、最終的に金属ワークの耐圧性、金属強度および加工精度の向上、塗装メッキ処理後のフクレ防止等の含浸効果を高めることが可能となる。 According to the method for removing the residual cleaning liquid in the organic impregnation seal processing method according to the present invention, the residual cleaning liquid adhering to the micropores and the casting cavity is removed in vacuum (reduced pressure) in units of microns by providing a vacuum process in the pretreatment process. Therefore, the adhesion of the impregnating liquid in the organic impregnation treatment process, which is a subsequent process, is improved. Finally, the pressure resistance of the metal workpiece, the improvement of the metal strength and processing accuracy, the prevention of blistering after the coating plating process, etc. It is possible to enhance the impregnation effect.
また、本発明によれば、前処理工程における洗浄工程の次の乾燥工程においては、従来の乾燥工程と同じ方法を採用しているため、新たな設備投資、製造コスト、製造工数、製造スペースは不要である。 Moreover, according to the present invention, since the same method as the conventional drying process is adopted in the drying process subsequent to the cleaning process in the pretreatment process, the new capital investment, manufacturing cost, manufacturing man-hour, and manufacturing space are It is unnecessary.
さらに、本発明によれば、前処理工程に新たに設けられる真空工程は、前工程の乾燥工程で加温された金属ワークを真空タンクに約１５分間投入するもので、新たに設けた真空工程は、従来からある前処理工程内の常温冷却工程時間内に吸収されるもので、新たな処理工程数の増大につながるものではない。 Furthermore, according to the present invention, the vacuum process newly provided in the pretreatment process is a process in which the metal workpiece heated in the drying process of the previous process is put into the vacuum tank for about 15 minutes. Is absorbed within the conventional room temperature cooling process time in the pretreatment process, and does not lead to an increase in the number of new process processes.
本発明は、有機含浸シール処理法における洗浄工程、乾燥工程、常温冷却工程から構成される前処理工程中に、真空工程を設けたことを最大の特徴とする。以下、本発明にかかる有機含浸シール処理法における残留洗浄液の除去方法の実施形態を図面に基づいて説明する。 The present invention is characterized in that a vacuum process is provided in a pretreatment process including a cleaning process, a drying process, and a room temperature cooling process in the organic impregnation seal processing method. Hereinafter, an embodiment of a method for removing a residual cleaning liquid in an organic impregnation sealing method according to the present invention will be described with reference to the drawings.
図１は、本発明にかかる有機含浸シール処理法における残留洗浄液の除去方法を示すチャート図である。
洗浄工程、乾燥工程、真空工程、常温冷却工程から構成される前処理工程と、有機含浸処理工程から成る有機含浸シール処理法で構成される。
FIG. 1 is a chart showing a method for removing a residual cleaning liquid in an organic impregnation seal treatment method according to the present invention.
It comprises an organic impregnation seal treatment method comprising a pretreatment step comprising a washing step, a drying step, a vacuum step, and a room temperature cooling step, and an organic impregnation treatment step.
洗浄工程とは、金属ワークの鋳型成型あるいは切削加工時に付着する油脂類、水分、切り粉、汚れ等を洗浄液（中性洗剤）で洗浄するものである。 The cleaning step is to wash oils and fats, moisture, chips, dirt, etc. adhering during mold forming or cutting of a metal workpiece with a cleaning liquid (neutral detergent).
乾燥工程とは、前記洗浄工程で金属ワークの表面に付着した洗浄液を加熱・乾燥させるものである。例えば、ジェットヒーター熱風乾燥機で約９０分間、１３０℃の温度で加温して乾燥させる。
A drying process heats and dries the cleaning liquid adhering to the surface of the metal workpiece in the cleaning process. For example, it is heated and dried at a temperature of 130 ° C. for about 90 minutes with a jet heater hot air dryer.
真空工程は、乾燥工程で加熱・乾燥させた金属ワークを、加熱された状態のまま真空タンクに投入して約１５分間真空処理を行うものである。従来通りの乾燥工程では、上記の通り主に金属ワークの表面部分しか乾燥を行えず、該金属ワークの微細孔や鋳巣に浸入した洗浄液までを完全に乾燥させることは困難であった。これに対し、本真空工程を採用することにより、乾燥工程をもってしてもなお微細孔や鋳巣に残留している洗浄液をミクロン単位で真空（減圧）除去することが可能となる。これにより、有機含浸処理工程の含浸効果を高めることができるものである。 In the vacuum process, the metal workpiece heated and dried in the drying process is put into a vacuum tank in a heated state and subjected to vacuum treatment for about 15 minutes. In the conventional drying process, only the surface portion of the metal workpiece can be dried as described above, and it has been difficult to completely dry the cleaning liquid that has entered the fine holes and the casting cavity of the metal workpiece. On the other hand, by adopting this vacuum process, it becomes possible to vacuum (reduced pressure) removal of the cleaning liquid remaining in the micropores and the casting cavity even in the drying process in units of microns. Thereby, the impregnation effect of the organic impregnation treatment step can be enhanced.
なお、この真空工程において、真空−加圧法を採用することにより、微細孔や鋳巣に残留している洗浄液を効率良く除去する手段を講じることも可能である。 In this vacuum process, by adopting a vacuum-pressurization method, it is possible to take a means for efficiently removing the cleaning liquid remaining in the fine holes and the casting cavity.
常温冷却工程は、従来の自然冷却方法と全く同様な手法を用いるものであり、約１３０℃まで加熱された金属ワークを真空タンクから取り出して自然冷却することで、常温まで冷すものである。なお、自然冷却でなく、機械的に強制冷却して冷却までの時間を短縮することも考え得る。
The room-temperature cooling process uses a method that is exactly the same as the conventional natural cooling method, and is cooled to room temperature by taking out a metal workpiece heated to about 130 ° C. from the vacuum tank and naturally cooling it. It is also conceivable to shorten the time until cooling by mechanically cooling instead of natural cooling.
有機含浸工程は、従来の浸漬−真空（減圧）法、真空（減圧）−浸漬法、真空（減圧）−浸漬−加圧法のいずれかによる有機含浸処理法で処理されるもので、いずれを採用しても構わない。例えば、真空（減圧）−浸漬−加圧法を例にとって以下説明する。かかる真空（減圧）−浸漬−加圧法は、真空工程、加圧工程、液切り工程、予備洗浄工程、本洗浄工程、加熱硬化工程の各工程から成る。 The organic impregnation process is performed by an organic impregnation treatment method according to any of the conventional immersion-vacuum (reduced pressure) method, vacuum (reduced pressure) -immersion method, and vacuum (reduced pressure) -immersion-pressurization method. It doesn't matter. For example, a vacuum (reduced pressure) -immersion-pressurization method will be described below as an example. The vacuum (decompression) -immersion-pressurization method includes a vacuum process, a pressurization process, a liquid draining process, a preliminary cleaning process, a main cleaning process, and a heat curing process.
まず真空工程は、バスケット内に金属ワークを含浸後の液切りの良い方向に収め、該バスケットを含浸タンクに入れ、５ｍｍＨｇ以下の真空状態を約１５分間維持する。 First, in the vacuum process, the metal workpiece is placed in a basket in a direction in which the liquid can be drained after being impregnated, the basket is placed in an impregnation tank, and a vacuum state of 5 mmHg or less is maintained for about 15 minutes.
加圧工程は、真空状態の含浸タンクへ含浸液を注入し、次に含浸タンクの中にコンプレッサーによって圧搾空気を送り込み、圧力を５〜１０ｋｇｆ／ｃｍ２で５〜３０分間維持する。特に真空状態の含浸タンクへ含浸液を注入する際に、前処理工程における真空工程において事前に金属ワークの微細孔や鋳巣に残留する洗浄液を除去してあることで、含浸液の金属ワークへの密着性が良くなり、最終的に耐圧性、金属強度および加工精度の向上、塗装メッキ処理後のフクレ防止を図ることができる。
In the pressurizing step, the impregnation liquid is injected into the impregnation tank in a vacuum state, and then compressed air is fed into the impregnation tank by a compressor, and the pressure is maintained at 5 to 10 kgf /
液切り工程とは、加圧含浸が終了したら圧搾空気の圧力を利用して含浸タンク内の含浸液を貯液タンクへ戻し、さらに、含浸タンクの蓋を開けバスケットを傾斜させるか回転させて、金属ワークやバスケットの表面や凹みに付着している含浸液をできる限り回収するものである。 With the liquid draining process, when the pressure impregnation is completed, the impregnation liquid in the impregnation tank is returned to the liquid storage tank using the pressure of the compressed air, and the impregnation tank is opened and the basket is tilted or rotated. The impregnating liquid adhering to the surface or dent of the metal workpiece or basket is collected as much as possible.
予備洗浄工程とは、洗浄槽中の水で予備洗浄し、金属ワークの表面に付着している大部分の含浸液を洗い落とすものである。 The pre-cleaning step is a pre-cleaning with water in the cleaning tank to wash off most of the impregnating liquid adhering to the surface of the metal workpiece.
本洗浄工程とは、流水や温水を利用して金属ワークに付着している含浸液を完全に洗い落とすものである。 The main cleaning step is to completely wash off the impregnating liquid adhering to the metal workpiece using running water or warm water.
加熱硬化工程とは、金属ワークに熱を加えて微細孔や鋳巣内に浸入した含浸液を加熱硬化させるものである。具体的には、熱風乾燥器により加熱硬化させたり（９０〜１３０℃、１２０〜４５分）、あるいは、湯浸硬化槽で加熱硬化させる（８５〜９５℃、１５〜２０分）。 In the heat curing step, heat is applied to the metal workpiece to heat and cure the impregnating liquid that has entered the fine holes or the casting cavity. Specifically, it is cured by heating with a hot air dryer (90 to 130 ° C., 120 to 45 minutes), or is cured by heating in a bath-curing bath (85 to 95 ° C., 15 to 20 minutes).
図２は、従来の有機含浸シール処理法における残留洗浄液の除去方法を示すチャート図である。
基本的に洗浄工程、乾燥工程、常温冷却工程から構成される前処理工程と、有機含浸工程から成る有機含浸シール処理法である。前処理工程の乾燥工程と常温冷却工程の間に真空工程を設けていないことから、前の洗浄工程で微細孔や鋳巣に付着する残留洗浄液をミクロン単位で完全に除去することができな。したがって、有機含浸工程の含浸効果を弱めることになり、含浸された金属ワークの耐圧性、金属強度および加工精度の向上、塗装メッキ処理後のフクレ防止機能など、本発明の有機含浸シール処理法における残留洗浄液の除去方法によるものと比較して明らかに劣るものである。
FIG. 2 is a chart showing a method for removing a residual cleaning liquid in a conventional organic impregnation seal treatment method.
This is an organic impregnation seal treatment method basically comprising a pretreatment step comprising a washing step, a drying step, and a room temperature cooling step, and an organic impregnation step. Since a vacuum process is not provided between the drying process and the room temperature cooling process in the pretreatment process, the residual cleaning liquid adhering to the micropores and the casting cavity in the previous cleaning process cannot be completely removed in units of microns. Therefore, the impregnation effect of the organic impregnation step is weakened, and in the organic impregnation seal treatment method of the present invention, such as the pressure resistance of the impregnated metal workpiece, the improvement of metal strength and processing accuracy, the function of preventing blistering after paint plating treatment, etc. This is clearly inferior to that obtained by the residual cleaning solution removal method.
Claims (1)
金属ワークを洗浄する洗浄工程と、
前記洗浄工程で金属ワークの表面に付着した洗浄液を加熱・乾燥する乾燥工程と、
前記乾燥工程により加熱・乾燥させた金属ワークを加熱された状態のまま真空タンクに投入し、該金属ワークの鋳巣内に浸入した洗浄液を吸引する真空工程と、
金属ワークを真空タンクから取り出して常温まで冷却する常温冷却工程と、
金属ワークの微細孔及び鋳巣に樹脂を注入する有機含浸処理工程と、
から成ることを特徴とする有機含浸シール処理法における残留洗浄液の除去方法。 In the organic impregnation seal processing method that injects resin into the fine holes and cast holes that can be made into metal castings and seals them,
A cleaning process for cleaning metal workpieces;
A drying step of heating and drying the cleaning liquid adhering to the surface of the metal workpiece in the cleaning step;
A vacuum process of charging the metal workpiece heated and dried by the drying process into a vacuum tank while being heated, and sucking a cleaning liquid that has entered the casting cavity of the metal work; and
Room temperature cooling process to take out the metal workpiece from the vacuum tank and cool it to room temperature,
An organic impregnation treatment step of injecting resin into the fine holes and cast hole of the metal workpiece;
A method for removing residual cleaning liquid in an organic impregnation sealing treatment method, comprising:
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| JPS6075502A (en) * | 1983-10-03 | 1985-04-27 | Nissei Kk | Multifunctional post treating device in vacuum impregnating installation for perforated object |
| JPS63182391A (en) * | 1987-01-23 | 1988-07-27 | Daiichi Kasei Kogyo Kk | Impregnating agent for porous rigid material |
| CA2034370A1 (en) * | 1990-03-30 | 1991-10-01 | Peter W. Mueller | Process for identification evaluation and removal of microshrinkage |
| JP3185324B2 (en) * | 1992-02-03 | 2001-07-09 | 株式会社スリーボンド | Impregnation treatment method for impregnated work |
| JP2004123398A (en) * | 2002-09-30 | 2004-04-22 | Ebara Corp | Impregnation process and apparatus |
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