JP2007253204A

JP2007253204A - Lubricating mold-release agent for casting mold and method for applying the same agent

Info

Publication number: JP2007253204A
Application number: JP2006082127A
Authority: JP
Inventors: Koji Togawa; 浩司外川; Hirobumi Ohira; 博文大平; Toshiaki Shimizu; 俊明清水; Tomohiro Yamaguchi; 智宏山口; Tatsuhiko Hamaguchi; 達彦濱口; Tomiyuki Murayama; 富幸村山
Original assignee: Aisin Takaoka Co Ltd; Aoki Science Institute Co Ltd
Current assignee: Aisin Takaoka Co Ltd; Aoki Science Institute Co Ltd
Priority date: 2006-03-24
Filing date: 2006-03-24
Publication date: 2007-10-04
Anticipated expiration: 2026-03-24
Also published as: JP4690921B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lubricating mold-release agent for casting a mold, which molds a cast product having no blowhole on its surface and excellent luster, and to provide an applying method capable of achieving reduction in working time and the like. <P>SOLUTION: The lubricating mold-release agent for casting a mold has a flash point of 70-160°C and includes: (A) 50-90 mass% of solvent having a kinematic viscosity of 2-10 mm<SP>2</SP>/s at 40°C and having a flash point in the range of 70-160°C; (B) 1-10 mass% of high-viscosity mineral oil and/or synthetic oil having a kinematic viscosity of ≥100 mm<SP>2</SP>/s and ≤600 mm<SP>2</SP>/s at 40°C; (C) 0.1-3 mass% component of one or more kinds selected from the group of acrylic copolymer for improving wettability, acrylic modified polysiloxane having a flash point of ≤100°C, and extreme pressure agents; (D) ≤15 mass% silicone oil (D-1 component) for preventing seizing, which has a kinematic viscosity of ≥150 mm<SP>2</SP>/s at 40°C; and 1-10 mass% of additive (D-2 component) of one or more kinds having lubricating performance. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、アルミニウム、マグネシウム、亜鉛等の非鉄金属の重力鋳造及び低圧鋳造に用いる金型鋳造用潤滑離型剤及びその塗布方法に関する。 The present invention relates to a lubricating mold release agent for die casting used for gravity casting and low pressure casting of non-ferrous metals such as aluminum, magnesium, and zinc, and a coating method thereof.

周知のごとく、卵焼きは、フライパンに油を塗り、かき混ぜた玉子をその上に流し込むことにより作るのが一般的である。同様に、非鉄金属を鋳造する際には、金型と溶湯の固着を防止するため離型剤を金型に塗布し、溶解した高温（例えば、４５０℃以上）の溶湯を金型に流し込み、固化後、製品を取り出す。現在、この鋳造には各種の方法がある。溶湯の流し込み速度で見ると重力鋳造、低圧鋳造、スクイズ、高速ダイカストがあり、溶湯温度から見て半凝固鋳造も加わる。 As is well known, fried eggs are generally made by applying oil to a frying pan and pouring the mixed egg over it. Similarly, when casting a non-ferrous metal, a mold release agent is applied to the mold to prevent the mold and the molten metal from sticking, and the molten high temperature (eg, 450 ° C. or higher) is poured into the mold. After solidification, the product is removed. Currently, there are various methods for this casting. There are gravity casting, low-pressure casting, squeeze, and high-speed die casting when viewed from the pouring speed of the molten metal, and semi-solid casting is also added as viewed from the molten metal temperature.

金型鋳造用潤滑離型剤から考えると、鋳造時の溶湯の流速は大きな因子であり、重力鋳造のように鋳造時の溶湯の流速が小さいと、高温の金属溶湯に金型鋳造用潤滑離型剤が接している時間は長く、金型鋳造用潤滑離型剤の劣化が進行する。その結果、塗布膜が薄くなり、溶湯が固化した際、金型に固着することもある。そこで、劣化に影響を受けないよう、無機粉末に水を加えた「塗型剤」なるものが主に使われている（例えば、特許文献１参照）。しかし、塗型剤は劣化しないが、水を含有しているので、乾燥前に溶湯を流し込むと水蒸気爆発を起こす可能性がある。そのため、塗布後、数十分から数時間の乾燥工程が不可欠であり、「鋳造ごとに塗布し、生産する」と生産効率が極端に低くなる。 Considering the mold release lubricant, the flow rate of the molten metal during casting is a large factor, and if the flow rate of molten metal during casting is small, such as gravity casting, the molten metal for mold casting is lubricated and released. The time in which the mold is in contact is long, and the deterioration of the lubricant mold release agent for mold casting proceeds. As a result, when the coating film becomes thin and the molten metal solidifies, it may stick to the mold. Therefore, a “coating agent” obtained by adding water to inorganic powder is mainly used so as not to be affected by deterioration (see, for example, Patent Document 1). However, although the coating agent is not deteriorated, it contains water, and if the molten metal is poured before drying, there is a possibility of causing a steam explosion. For this reason, a drying process of several tens of minutes to several hours is indispensable after application, and the production efficiency becomes extremely low when “apply and produce every casting”.

そこで、「数十個または数百個生産毎に１回塗布する」のが現在の状況である。しかも、塗型剤の塗布は職人芸と言われ、優れた職人は１回塗布当たりの生産個数が多い。また、塗型剤で作られた粉体膜は部分的に剥離して製品の中に紛れ込み、製品の強度を極端に低下させる。しかし、いつ剥離が発生したか不明確なため、一般には剥離を起こした該当ロットの全製品を不合格とし、回収している。また製品意匠面の塗型が剥離すると、剥離した製品部が凸となり、外観不良となる。 Therefore, the current situation is “apply once every tens or hundreds of pieces”. Moreover, application of the coating agent is said to be craftsmanship, and excellent craftsmen have a large number of products produced per application. In addition, the powder film made of the coating agent is partially peeled off and mixed into the product, and the strength of the product is extremely reduced. However, since it is unclear when peeling occurred, generally all products in the corresponding lot where peeling occurred are rejected and collected. When the coating pattern on the product design surface is peeled off, the peeled product part becomes convex, resulting in poor appearance.

ところで、鋳造工程の中で、固着防止ばかりでなく、細かく刻み込まれた金型の部分に完全に湯が流れ、期待する型の製品に仕上がることも重要である。この湯流れを確保するため、塗型剤を厚く塗って、溶湯の冷却を遅め、湯の粘度を低く保ち、金型の細部に湯がいきわたるようにしている。前述のように数十回に１回塗布し、厚い塗布膜（数十から数百ミクロンの厚さ）を確保しているが、鋳造ごとに微量の無機粉体が製品中に持っていかれ、断熱のための塗布膜が徐々に薄くなり、湯流れを確保できなくなる。その結果、初期の製品の冷却速度と塗布直前の冷却速度の違いによる金属の結晶組織が異なり、塗布初期と後期で製品の品質が異なる欠点がある。即ち、製品の品質を安定させるには頻繁な塗布が必要となるが、塗布後の乾燥が必要となり、生産効率が低下する。 By the way, in the casting process, it is important not only to prevent sticking, but also to ensure that hot water completely flows into the finely engraved part of the mold and finishes the product of the expected mold. In order to secure this hot water flow, a thick coating agent is applied to slow down the cooling of the molten metal, keeping the viscosity of the hot water low, so that the hot water spreads through the details of the mold. As described above, it is applied once every several tens of times to ensure a thick coating film (thickness of several tens to several hundred microns), but a small amount of inorganic powder is brought into the product for each casting. The coating film for heat insulation becomes gradually thinner and the hot water flow cannot be secured. As a result, the metal crystal structure differs depending on the difference between the cooling rate of the initial product and the cooling rate immediately before coating, and there is a drawback in that the quality of the product differs between the initial stage and the later stage. That is, frequent application is required to stabilize the quality of the product, but drying after application is required, resulting in reduced production efficiency.

また、粉体膜で作られた製品の表面は一般に梨地状となり、製品によっては外観品質要求を満たさないため、艶出を目的とした後処理が必要になる。加えて、塗布膜は無機粉体であるので、飛散は避けられず、作業環境にも注意が必要である。 In addition, the surface of a product made of a powder film generally has a satin-like shape, and some products do not satisfy the appearance quality requirements, and therefore a post-treatment for the purpose of polishing is necessary. In addition, since the coating film is an inorganic powder, scattering is unavoidable and attention should be paid to the working environment.

なお、従来、４００℃以上でも劣化しない無機粉体を配合した油性離型剤として、例えば特許文献２に記載されたものが知られている。
特開昭５９−１６９６４２号公報特開平２−１１７９９２号公報 In addition, what was described in patent document 2, for example as an oil-based mold release agent which mix | blended the inorganic powder which does not deteriorate at 400 degreeC or more conventionally is known.
JP 59-169642 A Japanese Patent Laid-Open No. 2-117992

従来の水溶性塗型剤の場合、「塗布後、数十分から数時間の乾燥」が不可欠である。生産効率向上を目指し、乾燥回数を減らす努力が行われている。生産ごとに溶湯に巻き込まれて減少する膜厚を考慮し、初期塗布膜を過剰に厚くし、「数十個または数百個生産毎に１回塗布」を行っている。 In the case of a conventional water-soluble coating agent, “drying for several tens of minutes to several hours after coating” is indispensable. Efforts are being made to reduce the number of dryings with the aim of improving production efficiency. In consideration of the film thickness that is reduced by being caught in the molten metal every production, the initial coating film is excessively thickened, and “coating once every tens or hundreds of productions” is performed.

本発明はこうした事情を考慮してなされたもので、４０℃における動粘度が２〜１０ｍｍ^２／ｓで引火点が７０℃〜１６０℃の範囲の溶剤、４０℃における動粘度が１００ｍｍ^２／ｓ以上６００ｍｍ^２／ｓ以下の高粘度の鉱油及び／又は合成油、濡れ性を向上するためのアクリル・コポリマー，引火点が１００℃以下のアクリル変性ポリシロキサン及び極圧剤のうち１種以上、４０℃における動粘度が１５０ｍｍ^２／ｓ以上のシリコーン油及び潤滑性能を有する１種類以上の添加剤を適宜含み、引火点が７０〜１６０℃の構成とすることにより、鋳造製品の肌の巣がなくかつ良好な光沢を有する金型鋳造用潤滑離型剤を提供することを目的とする。 The present invention has been made in consideration of these circumstances, kinematic viscosity at 40 ° C. is at 2 to 10 mm ² / s solvent ranges flash point of 70 ° C. to 160 ° C., a kinematic viscosity at 40 ° C. is 100 mm ² / s One or more of high-viscosity mineral oil and / or synthetic oil of 600 mm ² / s or less, acrylic copolymer for improving wettability, acrylic-modified polysiloxane having a flash point of 100 ° C. or less, and extreme pressure agent, 40 By appropriately including a silicone oil having a kinematic viscosity at 150 ° C. of 150 mm ² / s or more and one or more additives having a lubricating performance, and having a flash point of 70 to 160 ° C., there is no skin nest of the cast product. It is another object of the present invention to provide a lubricating mold release agent for mold casting having good gloss.

また、本発明は、前記金型鋳造用潤滑離型剤を、鋳造毎あるいは１回置きあるいは２回置きに金型内面に塗布することにより、従来と比べ離型剤の塗布・乾燥時間を著しく減少させ、もって作業時間を短縮するとともに、塗布膜の過剰な膜厚に伴う膜剥離による問題を回避でき、もって鋳造製品の肌の巣がなくかつ良好な光沢を有する金型鋳造用潤滑離型剤の塗布方法を提供することを目的とする。 In addition, the present invention provides the mold release lubricant for mold casting by applying the mold release agent on the inner surface of the mold every casting or once or twice. Lubricating mold release for die casting that reduces the work time and avoids problems caused by film peeling due to excessive coating film thickness, and does not have the skin nest of the cast product and has good gloss. It aims at providing the coating method of an agent.

本発明に係る金型鋳造用潤滑離型剤は、（Ａ）４０℃における動粘度が２〜１０ｍｍ^２／ｓで引火点が７０℃〜１６０℃の範囲の溶剤を５０〜９０質量％、（Ｂ）４０℃における動粘度が１００ｍｍ^２／ｓ以上６００ｍｍ^２／ｓ以下の高粘度の鉱油及び／又は合成油を１〜１０質量％、（Ｃ）濡れ性を向上するためのアクリル・コポリマー、引火点が１００℃以下のアクリル変性ポリシロキサン及び極圧剤の群れから選ばれる1種または２種以上の成分を０．１〜３質量％、（Ｄ）高温で焼付を防止するための４０℃における動粘度が１５０ｍｍ^２／ｓ以上のシリコーン油（Ｄ−１成分）を１５質量％以下及び潤滑性能を有する１種類以上の添加剤（Ｄ−２成分）を１〜１０質量％含み、引火点が７０〜１６０℃であることを特徴とする。 The lubricating mold release agent for mold casting according to the present invention is (A) 50 to 90% by mass of a solvent having a kinematic viscosity at 40 ° C. of ² to 10 mm ² / s and a flash point of 70 ° C. to 160 ° C. B) 1-10% by mass of a high-viscosity mineral oil and / or synthetic oil having a kinematic viscosity at 40 ° C. of 100 mm ² / s to 600 mm ² / s, (C) Acrylic copolymer for improving wettability, flammability 0.1 to 3% by mass of one or more components selected from the group of acrylic modified polysiloxane and extreme pressure agent having a point of 100 ° C. or lower, (D) at 40 ° C. for preventing seizure at high temperature 15% by mass or less of silicone oil (D-1 component) having a kinematic viscosity of 150 mm ² / s or more and 1 to 10% by mass of one or more additives (D-2 component) having lubricating performance, and having a flash point 70 to 160 ° C.

本発明に係る金型鋳造用潤滑離型剤の塗布方法は、前記金型鋳造用潤滑離型剤を、鋳造毎あるいは１回置きあるいは２回置きに金型内面に塗布することを特徴とする。 The method for applying a lubricant mold release agent for mold casting according to the present invention is characterized in that the lubricant mold release agent for mold casting is applied to the inner surface of the mold every casting or once or twice. .

本発明によれば、鋳造製品の肌の巣がなくかつ良好な光沢を有する金型鋳造用潤滑離型剤を提供できる。また、本発明によれば、従来と比べ、離型剤の塗布・乾燥時間を著しく減少させ、もって作業時間を短縮するとともに、塗布膜の過剰な膜厚に伴う膜剥離による問題を回避でき、もって良好な鋳造製品の肌の巣がなくかつ良好な光沢を有する金型鋳造用潤滑離型剤の塗布方法を提供できる。 ADVANTAGE OF THE INVENTION According to this invention, the lubrication mold release agent for die casting which does not have the skin nest of a cast product, and has favorable gloss can be provided. In addition, according to the present invention, compared with the prior art, it significantly reduces the time for applying and drying the release agent, thereby shortening the work time and avoiding problems caused by film peeling due to excessive film thickness of the coating film, Therefore, it is possible to provide a method for applying a lubricating mold release agent for die casting which has no skin of a good cast product and has a good gloss.

以下、本発明について更に詳しく説明する。
１．金型鋳造用潤滑離型剤の品質
１）重力鋳造では、溶湯を金型の隅々まで押す力は溶湯の自重だけであり、本来、湯流れ性が悪い。そこで、金型面上に厚い断熱膜を形成し、溶湯が冷えず、溶湯が金型の隅々まで流れる工夫が必要となる。そのため、塗布膜の厚さを確保し、湯流れ性を良くする必要がある。即ち、塗布膜の厚さを確保するため、金型鋳造用潤滑離型剤の金型への付着量を増加させる工夫が必要である。ところで、金型には水平部分と垂直部が混在し、垂直部分の塗布膜が薄くなる嫌いがある。垂直部分の塗布膜を厚くする工夫として、ペンキ業界が採用している速乾性を活用し、溶剤を混合して本金型鋳造用潤滑離型剤に揮発性を付与することが考えられる。水平面を含め塗布膜を厚くする方法として、後述する付着力の高い各種添加剤を配合することが好ましい。 Hereinafter, the present invention will be described in more detail.
1. Quality of lubricant mold release agent for die casting
1) In gravity casting, the only force that pushes the molten metal to every corner of the mold is the weight of the molten metal. Therefore, it is necessary to devise a thick heat insulating film on the mold surface so that the molten metal does not cool and the molten metal flows to every corner of the mold. Therefore, it is necessary to ensure the thickness of the coating film and improve the hot water flowability. In other words, in order to ensure the thickness of the coating film, it is necessary to devise a method for increasing the amount of adhesion of the lubricant mold release agent for mold casting to the mold. By the way, there is a disagreement that the horizontal portion and the vertical portion are mixed in the mold, and the coating film in the vertical portion becomes thin. As a device for thickening the coating film in the vertical portion, it is conceivable to use the quick drying property adopted by the paint industry and to add volatility to the lubricant mold release agent for mold casting by mixing a solvent. As a method for thickening the coating film including the horizontal surface, it is preferable to add various additives having high adhesive strength described later.

２）湯流れ性を確保し、かつ、鋳造製品取り出し時、焼付・固着問題を起こさせないためには、潤滑性・離型性を高める必要がある。潤滑性の有る添加剤（例、低温に効果のある植物油、中間温度（例えば金型温度２５０〜３００℃）に効果のあるモリブデン、高温（例えば金型温度３００〜３７０℃）に効果のあるシリコーン油や極圧剤）を配合する。
３）前述した技術的長短を勘案し、本発明者らは、（Ａ）４０℃における動粘度が２〜１０ｍｍ^２／ｓで引火点が７０℃〜１６０℃の範囲の溶剤を５０〜９０質量％、（Ｂ）４０℃における動粘度が１００ｍｍ^２／ｓ以上６００ｍｍ^２／ｓ以下の高粘度の鉱油及び／又は合成油を１〜１０質量％、（Ｃ）金型面への濡れ性を向上し、スプレー粒子の金型への付着性を向上するため、アクリル・コポリマー、引火点が１００℃以下のアクリル変性ポリシロキサンや極圧添加剤を０．１〜３質量％、（Ｄ）高温で焼付を防止するための４０℃における動粘度が１５０ｍｍ^２／ｓ以上のシリコーン油（Ｄ−１成分）を１５質量％以下及び潤滑性能を有する１種類以上の添加剤（Ｄ−２成分）を１〜１０質量％含み、引火点が７０〜１６０℃であることを特徴とする、水を含まない金型鋳造用潤滑離型剤を探求するに至った。 2) It is necessary to improve lubricity and releasability in order to ensure hot water flow and not cause seizure / sticking problems when casting products are taken out. Lubricating additive (eg, vegetable oil effective at low temperature, molybdenum effective at intermediate temperature (eg, mold temperature 250-300 ° C.), silicone effective at high temperature (eg, mold temperature 300-370 ° C.) Oil and extreme pressure agent).
3) In consideration of the technical advantages and disadvantages described above, the present inventors have (A) 50 to 90 mass of a solvent having a kinematic viscosity at 40 ° C. of ² to 10 mm ² / s and a flash point of 70 ° C. to 160 ° C. %, (B) 1 to 10% by mass of high-viscosity mineral oil and / or synthetic oil having a kinematic viscosity at 40 ° C. of 100 mm ² / s to 600 mm ² / s, (C) Improves wettability to the mold surface In order to improve the adhesion of spray particles to the mold, acrylic copolymer, acrylic modified polysiloxane having a flash point of 100 ° C. or less and extreme pressure additive are 0.1 to 3 mass%, (D) at high temperature. 15% by mass or less of silicone oil (D-1 component) having a kinematic viscosity at 40 ° C. of 150 mm ² / s or more for preventing seizure and one or more additives (D-2 component) having lubricating performance. -10 mass%, with a flash point of 70-160 ° C Characterized Rukoto, led to explore the die casting lubricant release agent does not contain water.

金型鋳造用潤滑離型剤のスプレー可能な粘度はかなり幅広いが、４０℃で２〜４５０ｍｍ^２／ｓが好ましい。ここで、動粘度が４５０ｍｍ^２／ｓを超えると、粒子径が大きくなり塗布量が増える。一方、動粘度が２ｍｍ^２／ｓ未満になると、スプレー用のポンプが磨耗し易くなる。従って、灯油の粘度の２ｍｍ^２／ｓを下限とするのが実用的である。また、作業性の観点から、自動車用軽油の引火点である７０℃より高く、乾燥性の観点から１６０℃以下の引火点を有する揮発性が好ましい。 The sprayable viscosity of the lubricant mold release agent for die casting is quite wide, but preferably ² to 450 mm ² / s at 40 ° C. Here, when the kinematic viscosity exceeds 450 mm ² / s, the particle diameter increases and the coating amount increases. On the other hand, when the kinematic viscosity is less than 2 mm ² / s, the spray pump is easily worn. Accordingly, it is practical to set the lower limit of the viscosity of kerosene to 2 mm ² / s. From the viewpoint of workability, volatility having a flash point higher than 70 ° C. which is the flash point of light oil for automobiles and 160 ° C. or less is preferable from the viewpoint of dryness.

また、使用条件に応じ、前述の金型鋳造用潤滑離型剤配合に（Ｅ）酸化防止剤を加えて塗布膜の酸化劣化を抑え、より長時間厚い塗布膜を維持することで湯流れを保つことが好ましい。 In addition, depending on the conditions of use, (E) an antioxidant is added to the above-mentioned lubricating mold release agent for mold casting to suppress oxidative deterioration of the coating film, and maintain a thick coating film for a longer period of time to reduce the hot water flow. It is preferable to keep.

更に、塗布膜の高温接触時間が長い場合や溶湯温度が高い（例えば４５０℃以上）場合、（Ｆ）無機粉体を加え、塗布膜を更に補強しても良い。なお、無機粉体として、黒くない粉体（Ｆ−１成分）と黒い黒鉛（Ｆ−２成分）が挙げられる。また、上記特許文献２には油性離型剤が記載されているが、ボロナイト粉体、粘土系沈降防止剤とシリコーンオイルの組成であり、本発明とは大きく異なる。 Further, when the high temperature contact time of the coating film is long or when the molten metal temperature is high (for example, 450 ° C. or higher), (F) inorganic powder may be added to further reinforce the coating film. Examples of the inorganic powder include non-black powder (F-1 component) and black graphite (F-2 component). Moreover, although the said oil-based mold release agent is described in the said patent document 2, it is a composition of a boronite powder, a clay type anti-settling agent, and a silicone oil, and is different from this invention.

２．金型鋳造用潤滑離型剤の成分
１）Ａ成分
金型面で厚い油膜を形成させるには、一旦付着した高粘度成分が金型から垂流れないよう早急に溶剤を気化させるほうが良いので、速乾性のペンキに見られるように揮発速度の速い溶剤（Ａ成分）が良い。しかし、揮発が速いと、引火点が低くなるので、火災の危険が高くなる。従って、ガソリンのような揮発の速すぎるものは好ましくない。実用的には、旧油性離型剤に多用された灯油の引火点である４３℃よりは高く、自動車用燃料の軽油の引火点（７０℃）以上が好ましい。また、揮発性が低い（引火点が高い）と、乾燥しにくいので低粘度のＡ成分が残り塗布膜の粘度が低くなり、金型垂直面からの垂れ流れが起こり、塗布膜が薄くなる。引火点で表した揮発性として、１６０℃以下の溶剤（Ａ成分）が好ましい。 2. Components of lubricant mold release agent for mold casting 1) A component
In order to form a thick oil film on the mold surface, it is better to vaporize the solvent as quickly as possible so that the high-viscosity component that has adhered once does not flow down from the mold, so a solvent with a high volatilization rate as seen in fast-drying paint (A component) is good. However, if the volatilization is fast, the flash point becomes low, and the risk of fire increases. Therefore, an excessively rapid volatilization such as gasoline is not preferable. Practically, it is higher than 43 ° C., which is the flash point of kerosene frequently used in the former oil-based mold release agent, and preferably higher than the flash point (70 ° C.) of light oil for automobile fuel. Also, if the volatility is low (the flash point is high), it is difficult to dry, so the low viscosity component A remains and the viscosity of the coating film becomes low, dripping flow from the vertical surface of the mold occurs, and the coating film becomes thin. As the volatility represented by the flash point, a solvent (component A) of 160 ° C. or lower is preferable.

Ａ成分である溶剤の配合量は粘度、揮発性に加え、他の成分（Ｂ，Ｃ，Ｄ成分）の配合量にも影響され、５０〜９０質量％が好ましい。ここで、Ａ成分の溶剤は必ずしも１種類の溶剤だけではなく、複数の揮発性を有する溶剤を適宜混合しても良い。 The amount of the solvent as component A is influenced by the amount of other components (B, C, D components) in addition to the viscosity and volatility, and is preferably 50 to 90% by mass. Here, the solvent of the component A is not necessarily one type of solvent, and a plurality of volatile solvents may be appropriately mixed.

Ａ成分は高揮発・低粘度成分であり、金型面で蒸発する部分である。なお、人体への影響を考慮し、アルコール、エステル、ケトン等の極性の強い溶剤は使うべきではない。石油系で、かつ、殆どがパラフィン系飽和分の溶剤（溶剤―１）で硫黄、窒素分を極端に低く抑えた高度精製溶剤、あるいは溶剤−１よりも沸点がやや高い低粘度基油（溶剤―２）が好ましい。上記Ａ成分を「４０℃における動粘度が２〜１０ｍｍ^２／ｓ」とするのは、２ｍｍ^２／ｓ未満では金型鋳造用潤滑離型剤全体の粘度が下がり過ぎ噴霧用ポンプの磨耗耐久性に悪影響があるからであり、Ａ成分が１０ｍｍ^２／ｓを超えると金型鋳造用潤滑離型剤全体の粘度が上がり、本組成物をスプレーで適正に噴霧できないからである。 A component is a high volatility and low viscosity component, and is a part which evaporates on the mold surface. Considering the influence on the human body, solvents with strong polarity such as alcohol, ester, ketone should not be used. Low-viscosity base oil (solvent that is a highly refined solvent that is petroleum-based and mostly paraffin-saturated solvent (solvent-1), with sulfur and nitrogen content kept extremely low, or slightly higher boiling point than solvent-1 -2) is preferred. The component A is “kinematic viscosity at 40 ° C. of ² to 10 mm ² / s”. When the viscosity is less than 2 mm ² / s, the viscosity of the entire mold release lubricant is too low, and the wear durability of the spray pump This is because if the A component exceeds 10 mm ² / s, the viscosity of the entire lubricant mold release agent for die casting increases, and the composition cannot be properly sprayed.

２）Ｂ成分
Ｂ成分は高粘度基油であり、他の成分を付着させるための糊（バインダー）の役目をする。Ｂ成分は、高温で蒸発しにくい高粘度炭化水素が好ましく、４０℃における動粘度が１００ｍｍ^２／ｓ以上６００ｍｍ^２／ｓ以下の高粘度の鉱油及び／又は合成油を配合する。鉱油としてはギヤ油に使われる様な高粘度基油やシリンダー油を例示でき、合成油としてはＰＡＯ（ポリアルファー・オレフィン）やエステル系基油を例示できる。ここで、Ｂ成分の動粘度が１００ｍｍ^２／ｓ未満の場合、付着油膜が薄く糊の役目が弱くなる。一方、動粘度が６００ｍｍ^２／ｓを超えると、金型鋳造用潤滑離型剤の粘度が高くなりスプレーし難くなるし、金型鋳造用潤滑離型剤を生産する際、混合作業が困難になる。また、Ｂ成分の配合量は１〜１０質量％が好ましい。ここで、配合量が１質量％未満の場合、糊の役目が弱くなる。逆に、配合量が１０質量％を越えると、鋳造後「糊」が炭化した「オイルマーク」と呼ばれる色残り現象が起き、鋳造製品の不良となる。 2) B component
Component B is a high-viscosity base oil and serves as a paste (binder) for attaching other components. The B component is preferably a high-viscosity hydrocarbon that does not easily evaporate at a high temperature, and a high-viscosity mineral oil and / or synthetic oil having a kinematic viscosity at 40 ° C. of 100 mm ² / s to 600 mm ² / s is blended. Examples of mineral oils include high-viscosity base oils and cylinder oils used in gear oils, and examples of synthetic oils include PAO (polyalpha-olefin) and ester base oils. Here, when the kinematic viscosity of the B component is less than 100 mm ² / s, the attached oil film is thin and the role of the glue is weakened. On the other hand, if the kinematic viscosity exceeds 600 mm ² / s, the viscosity of the lubricant mold release agent for mold casting becomes high and it becomes difficult to spray, and mixing work becomes difficult when producing the lubricant mold release agent for mold casting. Become. Moreover, the compounding quantity of B component has preferable 1-10 mass%. Here, when the blending amount is less than 1% by mass, the role of the paste is weakened. On the other hand, if the blending amount exceeds 10% by mass, a color residue phenomenon called “oil mark” in which “glue” is carbonized after casting occurs, resulting in defective casting products.

３）Ｃ成分
Ｃ成分は濡れ性向上剤であり、弱い極性を有する炭化水素及びその化合物が挙げられる。例えばアクリル・コポリマー、引火点が１００℃以下のアクリル変性ポリシロキサン及び硫化エステルのような極圧剤（極圧添加剤）の群れから選ばれる1種以上の成分を合計０．１〜３質量％含ませることができる。濡れ性向上剤を添加すると、金型面への金型鋳造用潤滑離型剤の濡れ性が良くなり、金型面へ金型鋳造用潤滑離型剤が載りやすくなる。特に金型面が高温になると、金型鋳造用潤滑離型剤の軽質成分の急激な沸騰により油滴が金型面を濡らせない現象（ライデンフロスト現象）を起こし、金型面上での油膜形成を阻害する。ところが、濡れ性向上剤があると、濡れ性が良くなるので、この現象は抑えられ、油膜が厚く形成される。アクリル・コポリマー自体は分散能力もありＦ成分の粉体を分散させる能力もある。 3) C component
Component C is a wettability improver, and includes hydrocarbons having weak polarity and compounds thereof. For example, a total of 0.1 to 3% by mass of at least one component selected from the group of acrylic copolymers, acrylic modified polysiloxanes having a flash point of 100 ° C. or less, and extreme pressure agents (extreme pressure additives) such as sulfurized esters Can be included. When the wettability improver is added, the wettability of the mold casting lubricating mold release agent to the mold surface is improved, and the mold casting lubricating mold release agent is easily placed on the mold surface. In particular, when the mold surface becomes high temperature, oil droplets do not wet the mold surface (Leidenfrost phenomenon) due to the rapid boiling of the light components of the mold release lubricant, and the oil film on the mold surface. Inhibits formation. However, when there is a wettability improver, the wettability is improved, so this phenomenon is suppressed and an oil film is formed thick. The acrylic copolymer itself has a dispersing ability and also has the ability to disperse the F component powder.

４）Ｄ成分
Ｄ成分は摩擦を低減する潤滑剤である。金型で焼付を起こす温度は操業条件で異なり、重力鋳造では、約２００〜４５０℃が操業温度範囲であるので、金型鋳造用潤滑離型剤の添加剤には幅広い温度領域で潤滑性を付与する必要がある。しかし、粉体を除くと、１種類の添加剤でこの幅広い領域をカバーできない。従って、温度領域を分けて、２種類ほどの添加剤でカバーする必要がある。 4) D component
The D component is a lubricant that reduces friction. The temperature at which seizure occurs in the mold varies depending on the operating conditions. In gravity casting, the operating temperature range is approximately 200 to 450 ° C. Therefore, the additive for the lubricant mold release agent for mold casting has lubricity in a wide temperature range. It is necessary to grant. However, with the exception of powder, this wide area cannot be covered with a single additive. Therefore, it is necessary to divide the temperature region and cover with about two types of additives.

第一の添加剤群（Ｄ−１成分）として、摩擦係数はあまり低くはないが約３００〜３７０℃で焼付を防止する効果のあるシリコーン油を１５質量％以下配合する。ここで、シリコーン油は高温での潤滑性が期待されるので、「４０℃における動粘度が１５０ｍｍ^２／ｓ以上」の高粘度のシリコーン油が好ましい。鋳造製品に塗装しない場合はジメチル・シリコーンを含めたどの市販のシリコーン油でも良い。しかし、塗装する場合は塗装が載りにくいので、塗布量によってはジメチル・シリコーン油が好ましくない時がある。塗装する場合、シリコーン油としては、例えばアルキル・アラルキルまたはジメチルより長鎖のアルキル基を有するアルキル・シリコーン油が好ましい。
前記Ｄ−１成分を「１５質量％以下」としたのは、１５質量％を超えると金型にシリコーン又はシリコーン分解物が堆積し、鋳造製品の形状に悪影響を及ぼすからである。但し、シリコーン油はコストの観点からは配合量を低減することが好ましい。 As the first additive group (component D-1), 15% by mass or less of a silicone oil having an effect of preventing seizure at about 300 to 370 ° C., although the friction coefficient is not so low. Here, since the silicone oil is expected to have lubricity at a high temperature, a high viscosity silicone oil having a “kinematic viscosity at 40 ° C. of 150 mm ² / s or more” is preferable. If the cast product is not painted, any commercially available silicone oil including dimethyl silicone may be used. However, when painting, it is difficult to place the coating, so dimethyl silicone oil is not preferred depending on the amount of coating. In the case of painting, as the silicone oil, for example, alkyl aralkyl or alkyl silicone oil having an alkyl group longer than dimethyl is preferable.
The reason why the D-1 component is set to “15% by mass or less” is that when it exceeds 15% by mass, silicone or a silicone decomposition product is deposited on the mold, which adversely affects the shape of the cast product. However, the amount of silicone oil is preferably reduced from the viewpoint of cost.

第二の添加剤群（Ｄ−２成分）としては、例えば、１５０〜３００℃付近で低い摩擦を与える動植物系の油脂（例えば菜種油、大豆油、ヤシ油、パーム油、牛油、豚脂等の動植物油脂、脂肪酸エステル）、有機酸（ヤシ油脂肪酸、オレイン酸、ステアリン酸、ラウリン酸、パルチミン酸）、アルコールエステル（牛脂脂肪酸等の高級脂肪酸のエステル）、有機モリブデン、油溶性の石鹸、油性ワックスが挙げられる。 As a 2nd additive group (D-2 component), for example, animal and plant type fats and oils (for example, rapeseed oil, soybean oil, coconut oil, palm oil, beef oil, lard, etc.) which give a low friction near 150-300 ° C Animal and vegetable oils and fats, fatty acid esters), organic acids (coconut oil fatty acids, oleic acid, stearic acid, lauric acid, palmitic acid), alcohol esters (esters of higher fatty acids such as beef tallow fatty acids), organic molybdenum, oil-soluble soaps, oily A wax is mentioned.

有機モリブデンとしては、例えばＭｏＤＤＣやＭｏＤＴＣが好ましく、アルミニウムとリン分が反応する可能性のあるＭｏＤＤＰやＭｏＤＴＰはあまり好ましくない。油溶性の石鹸としては、例えばＣａまたはＭｇのスルフォネート塩、フィネート塩、サリシレート塩が挙げられ、また溶解性に難点はあるが、有機酸金属塩が挙げられる。更に、若干腐食性はあるが、高温での焼付を防止できる極圧剤が挙げられる。硫黄系の硫化油、硫化エステルが好ましい。Ｓ−Ｐ系のＺｎＤＤＰは臭く、塩素系は金属との反応による腐食があり、避けるべきである。これらの潤滑性を有する１種類以上の添加剤（Ｄ−２成分）を１〜１０質量％添加する。 As the organic molybdenum, for example, MoDDC and MoDTC are preferable, and MoDDP and MoDTP in which aluminum and phosphorus may react are less preferable. Examples of oil-soluble soaps include Ca or Mg sulfonate salts, finate salts, and salicylate salts, and organic acid metal salts, although there are difficulties in solubility. Further, there are extreme pressure agents that are slightly corrosive but can prevent seizure at high temperatures. Sulfur oils and sulfur esters are preferred. SP-based ZnDDP is odorous and chlorine-based corrosion is caused by reaction with metals and should be avoided. 1-10 mass% of 1 or more types of additives (D-2 component) which have these lubricity are added.

５）Ｅ成分
Ｅ成分は酸化防止剤である。後述する酸化防止剤を０．２〜２質量％配合することで、金型鋳造用潤滑離型剤の劣化が抑えられる。その結果、初期油膜厚さが維持でき、断熱性が向上し、最終的には湯流れが向上する。酸化防止剤は３種類に類別でき、１種または２種以上を配合することができる。 5) E component
E component is an antioxidant. By mix | blending 0.2-2 mass% of antioxidant mentioned later, deterioration of the lubricous mold release agent for metal mold | die casting is suppressed. As a result, the initial oil film thickness can be maintained, the heat insulation is improved, and the hot water flow is finally improved. Antioxidants can be classified into three types, and one or two or more types can be blended.

第一類群のアミン系酸化防止剤として、例えば、モノノニルジフェニルアミン等のモノアルキルジフェニルアミン系、４，４’−ジブチルフェニルアミン、４，４’−ジペンチルジフェニルアミン、４，４’−ジヘキシルジフェニルアミン、４，４’−ジヘプチルジフェニルアミン、４，４’−ジオクチルジフェニルアミン、４，４’−ジノニルジフェニルアミン等のジアルキルジフェニルアミン系、テトラブチルジフェニルアミン、テトラヘキシルジフェニルアミン、テトラオクチルジフェニルアミン、テトラノニルジフェニルアミン等のポリアルキルジフェニルアミン系、ａ−ナフチルアミン、フェニル−ａ−ナフチルアミン、ブチルフェニル−ａ−ナフチルアミン、ペンチルフェニル−ａ−ナフチルアミン、ヘキシルフェニル−a−ナフチルアミン、ヘプチルフェニル−a−ナフチルアミン、オクチルフェニル−ａ−ナフチルアミン等が挙げられる。 As the first group of amine-based antioxidants, for example, monoalkyldiphenylamines such as monononyldiphenylamine, 4,4′-dibutylphenylamine, 4,4′-dipentyldiphenylamine, 4,4′-dihexyldiphenylamine, 4, Polyalkyldiphenylamines such as 4'-diheptyldiphenylamine, 4,4'-dioctyldiphenylamine, dialkyldiphenylamines such as 4,4'-dinonyldiphenylamine, tetrabutyldiphenylamine, tetrahexyldiphenylamine, tetraoctyldiphenylamine, tetranonyldiphenylamine , A-naphthylamine, phenyl-a-naphthylamine, butylphenyl-a-naphthylamine, pentylphenyl-a-naphthylamine, hexylphenyl-a-naphth Tylamine, heptylphenyl-a-naphthylamine, octylphenyl-a-naphthylamine and the like can be mentioned.

第二類群のフェノール系酸化防止剤としては、例えば、２，６−ジ−ｔｅｒｔ−ブチル−４−メチルフェノール、２，６−ジ−ｔｅｒｔ−ブチル−４−エチルフェノール、４，４−メチレンビス（２，６−ジ−ｔｅｒｔ−ブチルフェノール）、２，２−メチレンビス（４−エチル−６−ブチルフェノール）、高分子量単環フェノリック、多環ターシャリーブチル・フェノール、ＢＨＴ（ＢｕｔｙｌａｔｅｄＨｙｄｒｏｘｙＴｏｌｕｅｎｅ）、ＢＨＡ（ＢｕｔｙｌａｔｅｄＨｙｄｒｏｘｙＡｎｉｓｏｌｅ）が挙げられる。
第三類群のクレゾール系酸化防止剤としては、例えば、ジターシャリーブチルパラクレゾール、２−６−ジーターシャリーブチル・ジメチルアミノ−ｐ−クレゾールが挙げられる。 Examples of the second group of phenolic antioxidants include 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-ethylphenol, 4,4-methylenebis ( 2,6-di-tert-butylphenol), 2,2-methylenebis (4-ethyl-6-butylphenol), high molecular weight monocyclic phenolic, polycyclic tertiary butyl phenol, BHT (Butylated Hydroxylene Toluene), BHA (Butylated) Hydroxy Anisole).
Examples of the third group of cresol antioxidants include ditertiary butyl paracresol and 2-6-ditertiary butyl dimethylamino-p-cresol.

６）Ｆ成分
Ｆ成分は無機粉体であり、Ｆ−１成分群とＦ−２成分群からなる。４００℃を超える温度領域では、上記のＢ，Ｃ，Ｄ、Ｅ成分は短時間で分解する。分解しても離型性を保持する添加剤はあるが、塗布膜は薄くなり、断熱性が低下する。後述の無機粉体は高温で劣化しにくく、厚い粉体膜を形成し断熱性を発揮する。 6) F component
The F component is an inorganic powder and consists of an F-1 component group and an F-2 component group. In the temperature range exceeding 400 ° C., the above B, C, D and E components decompose in a short time. Although there are additives that retain releasability even when decomposed, the coating film becomes thin and the heat insulating properties are reduced. The inorganic powder described later hardly deteriorates at high temperatures, and forms a thick powder film to exhibit heat insulation.

Ｆ−１成分群は比較的黒くない（即ち、白色又は灰色又は赤色等の少なくとも１種類）無機粉体であり、配合量は、１〜１０質量％が好ましい。無機粉体の配合量が１０質量％を超えると、金型鋳造用潤滑離型剤を使用する前に沈降し品質問題を起こすし、鋳造製品の艶が悪くなる。また、作業現場が粉体で汚れる。配合量が１質量％未満の場合、高温での効果が少ない。無機粉体としては、例えば、タルク、マイカ、雲母、粘土、有機クレイ(粘土に微量の有機物を付加したもの）、耐火モルタル、ボロンナイト、セリサイト、ＣａＣＯ_３，ホウ酸塩、アルミナ粉、ピロリン酸塩、重曹、酸化チタン、ベンガラ、ラジオライト、酸化ジルコニウムが挙げられる。 The F-1 component group is an inorganic powder that is not relatively black (that is, at least one type such as white, gray, or red), and the blending amount is preferably 1 to 10% by mass. If the blending amount of the inorganic powder exceeds 10% by mass, the product settles before using the mold release lubricant and causes a quality problem, and the gloss of the cast product deteriorates. Also, the work site becomes dirty with powder. When the blending amount is less than 1% by mass, the effect at high temperature is small. Examples of inorganic powders include talc, mica, mica, clay, organoclay (a small amount of organic matter added to clay), refractory mortar, boronite, sericite, CaCO ₃ , borate, alumina powder, pyrroline. Examples include acid salts, sodium bicarbonate, titanium oxide, bengara, radiolite, and zirconium oxide.

Ｆ−２成分群として、黒鉛、カーボンブラック、ダイヤモンド粉の少なくとも１種類の無機粉体が挙げられる。潤滑性はＦ−１成分より優れているが、作業現場の汚れはひどい。従って、これらの無機粉体を１０質量％以下配合すると良い。Ｄ成分のシリコーン油が存在する領域で、黒鉛を２質量％以上配合しても潤滑性はあまり改良されないが、粉体膜を厚くするため、１０質量％まで配合しても良い。 Examples of the F-2 component group include at least one inorganic powder of graphite, carbon black, and diamond powder. Although the lubricity is superior to the F-1 component, the work site is very dirty. Therefore, it is preferable to add 10% by mass or less of these inorganic powders. Even if 2% by mass or more of graphite is blended in the region where D component silicone oil is present, the lubricity is not so improved, but up to 10% by mass may be blended in order to increase the thickness of the powder film.

加えて、Ｆ−１，Ｆ−２成分である無機粉体を油に均一に分散させるため、分散剤を添加すると良い。
上記のＢ，Ｃ，Ｄ、Ｅ成分の配合量を最大にし、Ｆ成分の無機粉体を最小限に抑えると、作業現場の汚れが低減し、ユーザーのメリットとなる。 In addition, a dispersant may be added to uniformly disperse the inorganic powders as the F-1 and F-2 components in the oil.
When the blending amount of the above B, C, D, and E components is maximized and the inorganic powder of the F component is minimized, contamination at the work site is reduced, which is a merit for the user.

３．塗布方法
本願第２の発明である金型鋳造用潤滑離型剤の塗布方法は、上述したように、金型鋳造用潤滑離型剤を、鋳造毎あるいは１回置きあるいは２回置きに金型内面に塗布することを特徴とする。以下、この塗布方法について説明する。
１）従来の水溶性塗型剤の場合、上述したように、生産ごとに無機粉体が溶湯に巻き込まれて減少する膜厚を考慮し、初期塗布膜を過剰に厚くし、「数十個または数百個生産毎に１回塗布」を行っていた。本発明の場合は、水溶性塗型剤と違って油性の金型鋳造用潤滑離型剤を鋳造毎（毎回塗布）あるいは１回置きあるいは２回置きに金型内面に塗布する。ここで、本発明では、例えば「１〜２秒塗布後、数秒の乾燥」のため「毎回塗布」が可能となる。本発明の場合、百回鋳造しても塗布・乾燥の合計は１０分程度であり、水溶性塗型剤の数十分から数時間より遥かに短い作業時間である。なお、金型鋳造用潤滑離型剤を塗布するときはその塗布量を最小限にとどめることが好ましい。 3. Application method
According to the second aspect of the present invention, as described above, the method of applying the lubricant mold release agent for casting the mold is applied to the inner surface of the mold every casting or once or twice. It is characterized by applying. Hereinafter, this coating method will be described.
1) In the case of the conventional water-soluble coating agent, as described above, the initial coating film is excessively thickened in consideration of the film thickness that is reduced by the inorganic powder being involved in the molten metal every production. Or “apply once every several hundred pieces”. In the case of the present invention, unlike a water-soluble coating agent, an oil-based lubricating mold release agent for mold casting is applied to the inner surface of the mold every casting (every time application) or once or twice. Here, in the present invention, “every application” is possible because, for example, “after application for 1-2 seconds, drying for a few seconds”. In the case of the present invention, even if the casting is performed 100 times, the total of coating and drying is about 10 minutes, and the working time is much shorter than several tens of minutes to several hours of the water-soluble coating agent. In addition, when apply | coating the lubricous mold release agent for metal mold | die castings, it is preferable to keep the application quantity to the minimum.

その結果、次のａ）〜ｆ）のメリットが期待できる。
ａ）乾燥工程が短く、金型を生産に使え、ダウンタイムが減少する。
ｂ）毎回スプレーにより、塗型職人の技量の差が最小限に抑えられ、品質が安定する。
ｃ）毎回スプレーにより塗布膜の厚みが均質となり、鋳造製品の品質が安定する。
ｄ）従来法のように塗布膜を過剰の厚みにする必要が無くなるため、剥離による不合格のリスクを低減できる。
ｅ）過剰な膜厚さがなくなり、膜の厚さは必要最小限のため、冷却性が良くなる。
ｆ）凝固が短い時間で起こり、金属結晶が微細となり、強靭な製品となる。 As a result, the following merits a) to f) can be expected.
a) The drying process is short, the mold can be used for production, and downtime is reduced.
b) By spraying each time, the skill difference of the paint craftsman is minimized, and the quality is stabilized.
c) The thickness of the coating film becomes uniform by spraying each time, and the quality of the cast product is stabilized.
d) Since it is not necessary to make the coating film excessively thick as in the conventional method, the risk of failure due to peeling can be reduced.
e) Since the excessive film thickness is eliminated and the film thickness is the minimum necessary, the cooling property is improved.
f) Solidification occurs in a short time, the metal crystal becomes fine, and a tough product is obtained.

本発明の「毎回塗布」に換え、本発明の金型鋳造用潤滑離型剤を１回置きあるいは２回置きに塗布する（間欠的に塗布する）場合が考えられ、この場合、ゆとりを持って塗布膜を若干厚くする必要がある。ここで、過剰な塗布膜は、一部熱分解によるガスの発生、鋳巣の問題、製品の強度低下に至る可能性がある。従って、必要最小限の塗膜厚さとするため、毎回塗布することが最も好ましい。 In place of “every time application” of the present invention, the mold release lubricant for mold casting of the present invention may be applied once or twice (applied intermittently). Therefore, it is necessary to make the coating film slightly thicker. Here, an excessive coating film may lead to generation of gas due to partial thermal decomposition, a problem of a cast hole, and a reduction in strength of a product. Therefore, it is most preferable to apply each time in order to obtain the minimum necessary coating thickness.

２）上記したように、毎回スプレーした場合、毎回乾燥が速くなければならない。そこで、本発明の金型鋳造用潤滑離型剤から水を排除し、かつ、乾燥性を速めるため高い揮発性を付与している。 2) As mentioned above, when sprayed every time, the drying must be fast every time. Therefore, high volatility is imparted in order to eliminate water from the mold release lubricant for mold casting of the present invention and to speed up drying.

以下、本発明の実施例について説明する。
（Ａ）図の説明
まず、本発明の実施例で使用するアルミ溶湯の湯流れ性評価試験器、及び重力鋳造を模した成形性評価試験器について説明する。
図１は、湯流れ試験器の概略的な斜視図を示す。図２（Ａ）は図１の湯流れ試験器の一構成である台の正面図、図２（Ｂ）は図２（Ａ）の側面図、図３（Ａ）は図１の湯流れ試験器の一構成である蓋の正面図、図３（Ｂ）は図３（Ａ）の側面図、図３（Ｃ）は図３（Ａ）の底面図、図３（Ｄ）は図３（Ｃ）のＸ−Ｘ線に沿う断面図を示す。図４（Ａ）は図１の湯流れ試験器の一構成である枡の斜視図、図４（Ｂ）は図４（Ａ）の底面図、図５は図１の湯流れ試験器の一構成である棒の正面図を示す。 Examples of the present invention will be described below.
(A) Explanation of figure
First, a molten aluminum flowability evaluation tester used in the examples of the present invention and a formability evaluation tester imitating gravity casting will be described.
FIG. 1 shows a schematic perspective view of a hot water flow tester. 2A is a front view of a stand that is one configuration of the hot water flow tester of FIG. 1, FIG. 2B is a side view of FIG. 2A, and FIG. 3A is a hot water flow test of FIG. 3 (B) is a side view of FIG. 3 (A), FIG. 3 (C) is a bottom view of FIG. 3 (A), and FIG. 3 (D) is FIG. Sectional drawing which follows the XX line of C) is shown. 4 (A) is a perspective view of a bowl as one configuration of the hot water flow tester of FIG. 1, FIG. 4 (B) is a bottom view of FIG. 4 (A), and FIG. 5 is one of the hot water flow tester of FIG. The front view of the stick | rod which is a structure is shown.

前記湯流れ試験器は、鉄製の台１と、この台１の上に載置される鉄製の蓋２と、この蓋２の上に載置されるイソライト・レンガ製の枡３と、イソライト・レンガ製の棒４と、ガスバーナー５とから構成されている。台１は、図１及び図２に示すように、長手方向に沿う一端側に上部方向に突出する突出部１ａを備え、その突出部１ａにはテーパ面１ｂが形成されている。蓋２の一端側で台１と接する部分には、図１及び図３（Ａ）に示すようにテーパ面２ａが形成されている。図３（Ｃ），（Ｄ）に示すように、蓋２のテーパ面２ａには溶湯を流すための溝２ｂが形成され、下面には溝２ｂに連通する溝２ｃが形成されている。 The hot water flow tester includes an iron base 1, an iron lid 2 placed on the base 1, an isolite brick fence 3 placed on the lid 2, It consists of a brick rod 4 and a gas burner 5. As shown in FIGS. 1 and 2, the table 1 includes a protruding portion 1a protruding upward in one end side along the longitudinal direction, and a tapered surface 1b is formed on the protruding portion 1a. A taper surface 2a is formed at a portion in contact with the base 1 on one end side of the lid 2 as shown in FIGS. 1 and 3A. As shown in FIGS. 3C and 3D, a groove 2b for flowing molten metal is formed on the tapered surface 2a of the lid 2, and a groove 2c communicating with the groove 2b is formed on the lower surface.

蓋２の上部には、把手６が取り付けられている。枡３には、溶湯を供給するための開口部７と該開口部７に連通する穴８が形成されている。枡３は、枡３の穴８が蓋の溝２ｂに位置するように蓋２上に載置される。棒４の先端は図５に示すように円錐形状になっており、この部分が枡３の穴８を塞ぐように枡３にセットされる。棒４は、溶湯を枡３に収容する前は棒４の先端を穴８に差し込んだ状態にし、溶湯を蓋２の溝２ｂ、２ｃ側に流す時は棒４を上方に持ち上げるようになっている。 A handle 6 is attached to the top of the lid 2. The trough 3 is formed with an opening 7 for supplying a molten metal and a hole 8 communicating with the opening 7. The flange 3 is placed on the lid 2 so that the hole 8 of the flange 3 is positioned in the groove 2b of the lid. The tip of the rod 4 has a conical shape as shown in FIG. 5, and this portion is set on the rod 3 so as to block the hole 8 of the rod 3. The rod 4 is configured such that the tip of the rod 4 is inserted into the hole 8 before the molten metal is accommodated in the trough 3, and the rod 4 is lifted upward when flowing the molten metal into the grooves 2b and 2c of the lid 2. Yes.

前記成形性評価試験器は、図６、図７及び図８に示すようになっている。ここで、図６（Ａ）は第１の金型の正面図、図６（Ｂ）は第１の金型の平面図を示す。図７（Ａ）は第２の金型の正面図、図７（Ｂ）は第２の金型の平面図を示す。図８は第１の金型及び第２の金型を加熱する時の説明図を示す。 The formability evaluation tester is configured as shown in FIGS. 6, 7 and 8. Here, FIG. 6A shows a front view of the first mold, and FIG. 6B shows a plan view of the first mold. FIG. 7A is a front view of the second mold, and FIG. 7B is a plan view of the second mold. FIG. 8 shows an explanatory diagram when the first mold and the second mold are heated.

鉄製の第１の金型１１には、図６に示すように、溶湯を注ぐための湯口１２を構成するための断面半円形状の切欠け部１２ａと、この切欠け部１２ａに連通された，製品形状のキャビティ部１３が刻み込まれている。キャビティ部１３は左右に分岐する６本のあばら骨状になっており、合計１８個のセル１４ａ，１４ｂ，１４ｃ，１４ｄ，１４ｅ，１４ｆ…からなっている。図６（Ｂ）のセル中の数字は各セルの厚みを示しており、左側と右側で厚みが異なっている。例えば、左側のセル１４ａ，１４ｂ，１４ｃの厚みは夫々１０ｍｍ，８ｍｍ，６ｍｍであるが，右側のセル１４ｄ，１４ｅ，１４ｆの厚みは夫々６ｍｍ，４ｍｍ，２ｍｍである。鉄製の第２の金型１５は、図７に示すように、断面半円形状の切欠け部１２ｂを除いて平坦である。なお、切り欠け部１２ａ，１２ｂが合わさって図９に示す湯口１２が構成される。第１の金型１１の内面、第２の金型１５の内面は、図８に示すようにバーナー１６により所定の温度まで加熱される。 As shown in FIG. 6, the iron-made first metal mold 11 communicated with the notch 12a having a semicircular cross section for forming a pouring gate 12 for pouring the molten metal, and the notch 12a. , A product-shaped cavity 13 is engraved. The cavity portion 13 has six ribs branched right and left, and is composed of a total of 18 cells 14a, 14b, 14c, 14d, 14e, 14f,. The numbers in the cells in FIG. 6B indicate the thickness of each cell, and the thicknesses are different on the left side and the right side. For example, the left cells 14a, 14b, and 14c have thicknesses of 10 mm, 8 mm, and 6 mm, respectively, while the right cells 14d, 14e, and 14f have thicknesses of 6 mm, 4 mm, and 2 mm, respectively. As shown in FIG. 7, the second metal mold 15 made of iron is flat except for the cutout portion 12 b having a semicircular cross section. Note that the notches 12a and 12b are combined to form the gate 12 shown in FIG. The inner surface of the first mold 11 and the inner surface of the second mold 15 are heated to a predetermined temperature by a burner 16 as shown in FIG.

（Ｂ）製造方法
高粘度基油、シリコーン油、濡れ性向上剤、潤滑添加剤を下記表１に示す質量％で混合した後、４０℃に加温し、１０分間攪拌した。次に、これらの混合物に溶剤を表１に示す質量％添加し、再度１０分間攪拌して、重力鋳造用の潤滑離型剤を試料として製造した。目的に応じ、初めの工程で、酸化防止剤、粉体、黒鉛を混合した。

(B) Manufacturing method
A high-viscosity base oil, silicone oil, wettability improver, and lubricant additive were mixed at a mass% shown in Table 1 below, and then heated to 40 ° C. and stirred for 10 minutes. Next, the solvent was added to these mixtures by mass% shown in Table 1, and the mixture was stirred again for 10 minutes to produce a lubricating mold release agent for gravity casting as a sample. According to the purpose, antioxidant, powder and graphite were mixed in the first step.

但し、表１において、
溶剤−１：ＳｈｅｌｌＣｈｅｍｉｃａｌの商品名：ＳｈｅｌｌｚｏｌＴＭ
溶剤―２：ＵＢＪ社の商品名：Ｙ−ｂａｓｅ−２
高粘度鉱油：ジャパン・エナジーの商品名：ブライストック
シリコーン油：旭化成ワッカーシリコーンの商品名：Release agentＴＮ
菜種油：名糖油脂工業の商品名：ナタネ油
有機モリブデン：旭電化工業の商品名：サクラルブ１６５
アクリル・コポリマー：ウイルバ・エリス社の商品名：ＥＦＫＡ−３７７８
Ｃａ石鹸：インフィニュームの商品名：Ｍ７１０１
硫化エステル：小桜商会の商品名：ＧＳ−２３０
（Ｃ）試験方法
（Ｃ−１）引火点の測定方法
試料の引火点の測定はＪＩＳ−Ｋ−２２６５に沿って、ペンスキーマルテン法で測定した。
（Ｃ−２）動粘度の測定方法
粉体を含まない潤滑離型剤の４０℃の動粘度は、ＪＩＳ−Ｋ−２２８３に沿って測定した。また、粉体を含む潤滑離型剤の場合、ＪＩＳ−Ｋ−７１１７−１に準拠した回転粘度計で測定した４０℃の絶対粘度（ｃＰ）と比重から４０℃の動粘度を算出した。 However, in Table 1,
Solvent-1: Product name of Shell Chemical: Shellzol ™
Solvent-2: UBJ trade name: Y-base-2
High-viscosity mineral oil: Japan Energy's brand name: Bristock
Silicone oil: Asahi Kasei Wacker Silicone brand name: Release agent TN
Rapeseed oil: Trade name of rapeseed oil industry: Rapeseed oil
Organic Molybdenum: Asahi Denka Kogyo's trade name: Sakurarubu 165
Acrylic copolymer: Wilba Ellis trade name: EFKA-3778
Ca soap: Infineum brand name: M7101
Sulfide ester: Kozakura Shokai brand name: GS-230
(C) Test method
(C-1) Flash point measurement method
The flash point of the sample was measured according to the JIS-K-2265 by the pen schulten ten method.
(C-2) Kinematic viscosity measurement method
The kinematic viscosity at 40 ° C. of the lubricant release agent containing no powder was measured according to JIS-K-2283. Moreover, in the case of the lubricating mold release agent containing powder, the kinematic viscosity at 40 ° C. was calculated from the absolute viscosity (cP) at 40 ° C. and the specific gravity measured with a rotational viscometer based on JIS-K-7117-1.

（Ｃ−３）ラボ酸化試験、ＲＯＢＴ法
ＪＩＳ−Ｋ−２５１４に沿って、回転式密閉型ポンプに試料を採取し、その後酸素を封入し、１５０℃条件下で酸化し、急激に酸素圧力の低下を起こすまでの時間を測定した。 (C-3) Lab oxidation test, ROBT method
In accordance with JIS-K-2514, a sample was taken in a rotary sealed pump, and after that, oxygen was sealed, oxidized under a condition of 150 ° C., and the time until a sudden decrease in oxygen pressure was measured.

（Ｃ−４）湯流れ性評価試験
図１の湯流れ性評価試験器による湯流れ性評価性試験の操作は次のとおりである。
まず、鉄製の自家製試験の台１と蓋２を別々にバーナー５の上に置き、所定の温度（実施例では２３０℃）まで加熱する。また、別のバーナー５で枡３と棒４を５００℃付近まで加熱する。台１と蓋２が所定の温度に達したなら、台１及び蓋２の溝２ｃに金型鋳造用潤滑離型剤を塗布し、蓋２の把手６をつかんで台１の上に蓋２を乗せる。蓋２の溝２ａ部分に穴８が合致するように枡３を置き、穴８を棒４で塞いで栓をする。別途、陶芸用溶解炉に溶かしてあるアルミ溶湯（ＡＣ４ＣＨ材、温度７００℃）９０ｃｃを鉄製の柄杓で採取し、直ちに枡３に注ぐ。２秒後、穴８から棒４の栓を抜き、試験器内に溶湯を流す。３０秒後、蓋２を台１から離し、台１の上で固化したアルミの長さを測定する。長く流れると湯流れ性が良いと判断する。 (C-4) Hot water flow evaluation test
The operation of the hot water flow evaluation test by the hot water flow evaluation tester in FIG. 1 is as follows.
First, the iron homemade test stand 1 and the lid 2 are separately placed on the burner 5 and heated to a predetermined temperature (230 ° C. in the embodiment). Further, the scissors 3 and the rod 4 are heated to about 500 ° C. by another burner 5. When the base 1 and the lid 2 reach a predetermined temperature, a mold release lubricant is applied to the groove 2c of the base 1 and the lid 2, and the lid 2 is placed on the base 1 by grasping the handle 6 of the lid 2. Put on. The scissors 3 are placed so that the hole 8 matches the groove 2a portion of the lid 2, and the hole 8 is closed with a stick 4 and plugged. Separately, 90 cc of molten aluminum (AC4CH material, temperature 700 ° C.) melted in a melting furnace for ceramics is collected with an iron handle, and immediately poured into the bowl 3. After 2 seconds, the rod 4 is removed from the hole 8 and the molten metal is poured into the tester. After 30 seconds, the lid 2 is separated from the table 1 and the length of the aluminum solidified on the table 1 is measured. If it flows for a long time, the hot water flow is judged to be good.

（Ｃ−５）成形性評価試験
図６〜図８の成形性評価試験器による成形性評価試験の操作は、次の通りである。
まず、図８に示すように、第１の金型１１及び第２の金型１５を別々のバーナー１６で所定の温度まで加熱する。次に、第１の金型１１及び第２の金型１５の内面に金型鋳造用潤滑離型剤を塗布し、数秒後、図９に示すように第１の金型１１と第２の金型１５を合わせる。つづいて、直ちに、溶解炉より鉄製の柄杓１７でアルミ溶湯１８(ＡＣ４ＣＨ、７００℃)を汲みだし、湯口１２よりアルミ溶湯１８（約２．８ｋｇ）を注湯する。アルミ凝固後(約２分)、第１の金型１１と第２の金型１５を分割し、第１の金型１１で固化した鋳造品１９（図１０図示）を取り出す。アルミが完全にキャビティを充填した形状になっているセルから転写した厚みの異なる部位２０の数を求める。完全な形状の部位２０の数が多ければ、成形性がよく、湯流れ性が良いと判断する。 (C-5) Formability evaluation test
The operation of the moldability evaluation test by the moldability evaluation tester of FIGS. 6 to 8 is as follows.
First, as shown in FIG. 8, the first mold 11 and the second mold 15 are heated to a predetermined temperature by separate burners 16. Next, a lubricating mold release agent for mold casting is applied to the inner surfaces of the first mold 11 and the second mold 15, and after a few seconds, as shown in FIG. Match the mold 15. Subsequently, the molten aluminum 18 (AC4CH, 700 ° C.) is drawn from the melting furnace with the iron handle 17 and the molten aluminum 18 (about 2.8 kg) is poured from the spout 12. After aluminum solidification (about 2 minutes), the first mold 11 and the second mold 15 are divided, and the cast product 19 (shown in FIG. 10) solidified by the first mold 11 is taken out. The number of portions 20 having different thicknesses transferred from a cell in which the cavity is completely filled with the cavity is obtained. If the number of completely shaped portions 20 is large, it is judged that the moldability is good and the hot water flowability is good.

（Ｄ−１）試験測定結果：酸化防止剤なし・粉体なしの場合
上記表１には、実施例１，２，３の成分、物性値、湯流れ性評価試験結果、塗布量及び成形性評価試験の結果を示す。
下記表２は、比較例１〜４における成分、物性、湯流れ性評価試験、塗布量及び成形性評価試験を示す。表２において、比較例１には本出願人製のダイカスト用油性離型剤，比較例２には重力鋳造で現在使用されている代表的な他社製の水溶性塗型剤，比較例３には本出願人製のラドル・コート剤で一部の会社で塗型剤の修理・補強剤として使われている一種の塗型剤（自社製なので入手性が良、比較例とする）、比較例４として「塗型剤なし・潤滑離型剤なし」のブランクを示す。

(D-1) Test measurement results: no antioxidant / no powder
Table 1 shows the components of Examples 1, 2, and 3, physical property values, hot water flow evaluation test results, coating amounts, and moldability evaluation test results.
Table 2 below shows the components, physical properties, molten metal flow evaluation test, coating amount and moldability evaluation test in Comparative Examples 1 to 4. In Table 2, the comparative example 1 is an oil-based mold release agent for die casting manufactured by the present applicant, the comparative example 2 is a representative water-soluble coating agent made by other companies currently used in gravity casting, the comparative example 3 Is a ladle coating agent made by the applicant, a type of coating agent used by some companies as a coating agent repair / reinforcement agent. Example 4 shows a blank of “no coating agent / no lubricating release agent”.

但し、表２において、
「−」印：測定なし
油性離型剤：青木科学研究所の商品名：ＷＦＲ−３Ｒ
水溶性塗型剤：三和油化の商品名：サンバリューＭＲ−Ｗ１４
ラドル・コート剤：青木科学研究所の商品名：スリック・ライナー＃３であり、無機金属を多量に含有。水溶性塗型剤と類似し、ラドルと溶湯の固着防止用薬剤。 However, in Table 2,
"-" Mark: No measurement
Oil-based mold release agent: Aoki Scientific Research Institute trade name: WFR-3R
Water-soluble coating agent: Sanwa Yuka's trade name: Sun Value MR-W14
Ladle coating agent: Aoki Scientific Research Institute product name: Slick Liner # 3, containing a large amount of inorganic metals. Similar to water-soluble coating agents, it is an anti-sticking agent for ladle and molten metal.

実施例１，２，３及び比較例１は水を含まない油性であり、引火点は７０℃以上、４０℃における動粘度は４５０（ｍｍ^２／ｓ）以下と好ましい範囲にある。比較例２，３は水溶性であり、乾燥工程が数十分から数時間かかる、あるいは推定粘度が数百から数千（ｍｍ^２／ｓ）とスプレーしにくく自動化しにくい等、実用上好ましくない問題点がある。 Examples 1, 2, and 3 and Comparative Example 1 are oily without water, and have a flash point of 70 ° C. or higher and a kinematic viscosity at 40 ° C. of 450 (mm ² / s) or less. Comparative Examples 2 and 3 are water-soluble, and the drying process takes several tens of minutes to several hours, or the estimated viscosity is several hundred to several thousand (mm ² / s), which is difficult to spray and difficult to automate. There is a problem.

何も塗布していない比較例４の場合、３０ｍｍしか溶湯は流れないが、代表的な水溶性塗型剤の比較例２の場合は４００ｍｍも流れた。鋳造を連続すると、徐々に粉体が鋳造製品に取られ膜厚が薄くなる。例えば、不良品が出てくるのは約５０μｍであるので、初期膜厚は１５０μｍ、と約３倍も厚く塗る。即ち、初期は過剰に塗膜を厚くするので断熱膜が厚く、溶湯の温度が低下せず高く保たれ、溶湯の粘度が低く保たれ、その結果、４００ｍｍと溶湯は長く流れた。本研究の目標は不良品が出る直前の油膜厚さで、毎回塗布することである。入手性の良い本出願人製のラドル・コート剤を使って湯流れ性評価試験を実施したところ、比較例３に示すように２４０ｍｍほど流れた。このレベルを本研究の目安とした。比較例１に示すように、ダイカスト用油性離型剤では５０ｍｍの湯流れであり、殆どブランクと同じであった。油膜が極端に薄いのが理由と言える（高額な油膜厚さ計で１回だけ測定したところ３μｍの油膜厚さであった）。比較例１と比べ、実施例１，２，３は多くの油溶性の添加剤を含有しており、アクリル・コポリマー、Ｃａ石鹸や硫化エステルを添加すると湯流れが良くなった。 In the case of Comparative Example 4 where nothing was applied, the molten metal flowed only 30 mm, but in the case of Comparative Example 2 of a typical water-soluble coating agent, it flowed as much as 400 mm. When casting is continued, the powder is gradually taken into the cast product and the film thickness is reduced. For example, the defective product comes out about 50 μm, so the initial film thickness is 150 μm, which is about 3 times thicker. That is, since the coating film was excessively thick at the initial stage, the heat insulating film was thick, the melt temperature was kept high without being lowered, and the melt viscosity was kept low. As a result, the melt flowed as long as 400 mm. The goal of this study is to apply the oil film every time with the oil film thickness just before the defective product comes out. When a hot metal flowability evaluation test was performed using a ladle coating agent manufactured by the present applicant, which had good availability, it flowed about 240 mm as shown in Comparative Example 3. This level was used as a guide for this study. As shown in Comparative Example 1, the oil-based mold release agent for die casting had a hot water flow of 50 mm and was almost the same as the blank. It can be said that the oil film is extremely thin (when measured only once with an expensive oil film thickness meter, the oil film thickness was 3 μm). Compared with Comparative Example 1, Examples 1, 2 and 3 contained many oil-soluble additives, and when an acrylic copolymer, Ca soap or sulfide ester was added, the hot water flow was improved.

更に実機により近い条件の成形性評価試験器（Ｃ−５項参照）で評価した。この試験器で鋳造された製品の形状は「３対合計６本のアバラ骨」であり、左側の各あばら骨は、先端に向かって１０，８，６ｍｍの３段階の厚みであり、右側は先端に向かって６，４，２ｍｍの厚みとなっている。合計で１８区分のセルに分かれているので、測定結果は、「その区分の個数」で表し、「１８」が最良である。比較例２の水溶性塗型剤の場合、１８個と良好な値である。一方、ダイカスト用油性離型剤の比較例１では、５個分しか流れない。明らかに、湯流れ性が劣る。アクリル・コポリマー、Ｃａ石鹸を含有する実施例２では、まだ、１２個と湯流れ性は不十分であるが、比較例１よりかなり良い。実施例２は「塗布量２ｃｃの塗布回数が１回」であるが、実施例１は同じ配合で「塗布量２ｃｃの塗布回数を３回（合計塗布量６ｃｃ）」とした結果、湯流れが「１８個」と良好になった。また、実施例３は、実施例１，２と配合は異なるが、「塗布量２ｃｃの塗布回数を２回（合計塗布量４ｃｃ）」とした場合、湯流れが「１８個」と良好であった。なお、比較例２、３の水溶性塗型剤とラドル・コート剤の塗布量は比較例１の６ｃｃより数倍も多かった。 Furthermore, it evaluated with the moldability evaluation tester (refer C-5 term) of the conditions nearer to an actual machine. The shape of the product cast by this tester is “3 pairs, total of 6 ribs”. Each rib on the left side has three thicknesses of 10, 8, and 6 mm toward the tip, and the right side is the tip. The thickness is 6 mm, 4 mm and 2 mm. Since the cells are divided into 18 divisions in total, the measurement result is represented by “the number of the divisions”, and “18” is the best. In the case of the water-soluble coating agent of Comparative Example 2, it is a good value of 18 pieces. On the other hand, in Comparative Example 1 of the oil-based mold release agent for die casting, only 5 pieces flow. Apparently, the hot water flow is inferior. In Example 2 containing acrylic copolymer and Ca soap, 12 pieces still have insufficient hot-water flow, but are considerably better than Comparative Example 1. In Example 2, the number of times of application of 2 cc is “one application”, but in Example 1, the same composition was used, and “number of times of application of 2 cc was 3 times (total application amount 6 cc)”. It became "18" and became favorable. Further, Example 3 is different in composition from Examples 1 and 2, but when “the number of times of application with a coating amount of 2 cc is set to 2 times (total coating amount of 4 cc)”, the hot water flow is as good as “18 pieces”. It was. In addition, the coating amounts of the water-soluble coating agent and the ladle coating agent in Comparative Examples 2 and 3 were several times larger than 6 cc in Comparative Example 1.

図１１は、上記実施例２により得られた部位の写真を模式的に描いた図を示す。図１１より、実施例２によれば、各セルから転写された厚みが異なりかつ欠けのない１２個の部位２０_１〜２０_１２が得られることが確認できた。 FIG. 11 is a diagram schematically showing a photograph of the part obtained in Example 2 described above. From FIG. 11, according to Example 2, it was confirmed that ₁₂ portions 20 _{1 to} 2012 having different thickness transferred from each cell and no chip were obtained.

鋳造製品の肌の光沢に関し、比較例２の代表的な塗型剤の場合は灰色で良くないが、実施例１，２，３の油性潤滑離型剤の場合は艶が増え良くなった。一方、鋳造製品の肌の巣に関しては、有機物を殆ど含有していない比較例２（水溶性塗型剤）が最良であり、実施例１，２，３の油性潤滑離型剤の場合は比較例２に比べて若干劣るが、良好な外観を示す。 Regarding the gloss of the skin of the cast product, in the case of the representative coating agent of Comparative Example 2, gray is not good, but in the case of the oil-based lubricating release agents of Examples 1, 2 and 3, the gloss is increased. On the other hand, with respect to the skin nest of the cast product, Comparative Example 2 (water-soluble coating agent) containing almost no organic matter is the best, and in the case of the oil-based lubricating release agents of Examples 1, 2, and 3, the comparison is made. Although slightly inferior to Example 2, it shows a good appearance.

（Ｄ−２）試験測定結果：酸化防止剤の効果
下記表３は、実施例４，５、比較例５の成分、物性、及び湯流れ性評価試験の結果を示す。

(D-2) Test measurement results: Effect of antioxidant
Table 3 below shows the results of the components, physical properties, and hot water flow evaluation tests of Examples 4 and 5 and Comparative Example 5.

但し、表３において、
フェノール系酸化防止剤：第一工業製薬の商品名：ラスミットＢＨＴ
アミン系酸化防止剤：アフトンケミカル社の商品名：ＨｉＴＥＣ−５６９
その他の成分は表１と同じ
表３に示すように、実施例４の引火点は７０℃以上、４０℃における動粘度は４５０（ｍｍ^２／ｓ）以下と好ましい範囲にある。また、ラボ酸化試験における耐酸化性能を測定したところ、比較例５（有機モリブデン、酸化防止剤ともになし）の場合、劣化時間の測定値は１５分と短く、すぐに酸化していた。実施例４（有機モリブデン、酸化防止剤ともに有り）の場合、劣化時間は８９０分と比較例５に比べ約６０倍長持ちし、劣化しにくい。従って、実施例４の場合、酸化防止剤は油性潤滑離型剤の酸化劣化を抑制していることがラボ酸化試験で確認できた。 However, in Table 3,
Phenolic antioxidants: Daiichi Kogyo Seiyaku brand name: Rasmit BHT
Amine-based antioxidant: Afton Chemical's trade name: HiTEC-569
The other components are the same as in Table 1. As shown in Table 3, the flash point of Example 4 is 70 ° C. or higher, and the kinematic viscosity at 40 ° C. is 450 (mm ² / s) or less. Moreover, when the oxidation resistance performance in the laboratory oxidation test was measured, in the case of Comparative Example 5 (without organic molybdenum and antioxidant), the measured value of the degradation time was as short as 15 minutes and was immediately oxidized. In the case of Example 4 (both organic molybdenum and antioxidants are present), the deterioration time is 890 minutes, which is about 60 times longer than that of Comparative Example 5, and hardly deteriorates. Therefore, in the case of Example 4, it was confirmed by the laboratory oxidation test that the antioxidant suppressed the oxidative deterioration of the oil-based lubricant release agent.

一方、湯流れ性評価試験における湯流れ長さに関し、比較例５（有機モリブデン、酸化防止剤ともになし）の場合は５０ｍｍと短く、実施例４（有機モリブデン、酸化防止剤ともに有り）の場合は１２０ｍｍと長く流れるようになった。 On the other hand, regarding the hot water flow length in the hot water flow evaluation test, the comparative example 5 (without organic molybdenum and antioxidant) is as short as 50 mm, and in the case of Example 4 (with organic molybdenum and antioxidant). It began to flow as long as 120 mm.

酸化防止剤を配合し金型鋳造用潤滑離型剤の酸化防止性を高めると、湯流れ性評価試験器に付着した塗布膜が酸化しにくくなり、塗布膜の厚さが維持され断熱性が向上し、溶湯の温度が低下しにくくなり、溶湯の粘度が低く保たれ、その結果、溶湯が長くまで流れたものと推定する。しかし、酸化防止剤の添加だけではまだまだ湯流れは不十分であり、極圧剤や粉体などの他の添加剤と併用することが望まれる。 If an antioxidant is added to increase the anti-oxidation property of the lubricant mold release agent for die casting, the coating film adhering to the hot water flow evaluation tester becomes difficult to oxidize, maintaining the thickness of the coating film and improving the heat insulation. It is estimated that the temperature of the molten metal is lowered and the viscosity of the molten metal is kept low, and as a result, the molten metal flows for a long time. However, the flow of hot water is still insufficient with the addition of antioxidant alone, and it is desirable to use it together with other additives such as extreme pressure agents and powders.

（Ｄ−３）試験測定結果：無機粉体を含有する場合
下記表４は、粉体を含有する金型鋳造用潤滑離型剤である実施例６，７，８の成分、物性、湯流れ性評価試験及び成形性評価試験の結果を示す。下記表５は、粉体を含有する金型鋳造用潤滑離型剤である実施例９，１０，１１，１２の成分、物性、湯流れ性評価試験及び成形性評価試験の結果を示す。表４及び表５に示すように、実施例６〜１２の引火点は７０℃以上、４０℃における動粘度は４５０（ｍｍ^２／ｓ）以下と好ましい範囲にある。

(D-3) Test measurement result: When containing inorganic powder
Table 4 below shows the results of the components, physical properties, molten metal flow property evaluation test and moldability evaluation test of Examples 6, 7, and 8 which are lubricant mold release agents containing powder. Table 5 below shows the results of the components, physical properties, molten metal flow evaluation test, and moldability evaluation test of Examples 9, 10, 11, and 12 that are powder mold-containing lubricant mold release agents. As shown in Tables 4 and 5, the flash points of Examples 6 to 12 are in the preferred range of 70 ° C. or higher and the kinematic viscosity at 40 ° C. of 450 (mm ² / s) or lower.

但し、表４において、
有機クレイ：ウイルバ・エリスの商品名：ガラマイト１５９８
黒鉛：中越黒鉛の商品名：96L-3（鱗状）３部と150F（土状）７部の混合物

However, in Table 4,
Organoclay: Wilba Ellis's trade name: Galamite 1598
Graphite: Product name of Chuetsu Graphite: A mixture of 3 parts of 96L-3 (scale-like) and 7 parts of 150F (soil-like)

但し、表５において、
アルミ粉：アジア・アルミの商品：アルペースト１００Ｍ
ダイヤモンド粉：樋口商会の商品名：クラスター・ダイアモンドの溶剤液
その他は表１及び表４と同じ
湯流れ性評価試験に関し、同じ配合でも塗布量を増すことで湯流れ性は良くなった。黒鉛、有機クレイを含有している金型鋳造用潤滑離型剤でも実施例１０の１ｃｃで１５０ｍｍ、実施例９の２ｃｃで２００ｍｍであったが、実施例６の６ｃｃで２６０ｍｍであった。更に黒鉛を増量した実施例７では、３００ｍｍと湯流れ性が更に長くなった。黒鉛に換えて、Ｃａ石鹸や硫化エステルとした実施例８では湯流れ性は若干落ちる。黒鉛の良さが確認されたが、黒鉛を使わなくとも湯流れ性が２５０ｍｍと良いので、有機クレイ、石鹸、硫化エステルで油膜は厚くなっていると予測される。一方、実施例１１では実施例９の黒鉛に換えて、ナノミクロンサイズのダイヤモンド粉を評価した。湯流れ性は実施例９の黒鉛の方が良いことから、粒子がある程度大きいと、厚い膜が形成され、湯流れ性が良くなるものと推定される。また、黒鉛とアルミ粉を比べた実施例９と実施例１２の結果を見ると、アルミ粉より黒鉛の方が湯流れ性が良かった。アルミ粉より黒鉛は金型に付着し易く、かつ、熱伝達が小さいため断熱性が良かったことも寄与している可能性がある。 However, in Table 5,
Aluminum powder: Asian aluminum products: Alpaste 100M
Diamond powder: Higuchi Shokai's product name: Cluster diamond solvent solution
Others were the same as in Table 1 and Table 4, and the hot water flow evaluation was improved by increasing the coating amount even with the same composition. Even in the case of the lubricating mold release agent for mold casting containing graphite and organoclay, it was 150 mm at 1 cc in Example 10 and 200 mm at 2 cc in Example 9, but 260 mm at 6 cc in Example 6. Further, in Example 7 in which the amount of graphite was increased, the hot metal flowability was further increased to 300 mm. In Example 8 in which Ca soap or sulfide ester is used instead of graphite, the hot water flow is slightly reduced. The goodness of graphite was confirmed, but even if graphite is not used, the flowability of hot water is as good as 250 mm. Therefore, it is predicted that the oil film is thick with organic clay, soap, and sulfide ester. On the other hand, in Example 11, in place of the graphite of Example 9, nanomicron-sized diamond powder was evaluated. Since the graphite of Example 9 is better in hot water flowability, it is estimated that if the particles are large to some extent, a thick film is formed and the hot water flowability is improved. Moreover, when the result of Example 9 and Example 12 which compared graphite with aluminum powder was seen, the direction of hot water was better in graphite than in aluminum powder. There is a possibility that graphite is easier to adhere to the mold than aluminum powder, and that heat insulation is small, so heat insulation is good.

成形性評価試験器での評価でも、実施例６，７，８の粉体を含有する金型鋳造用潤滑離型剤は１８個分流れ、良好な性能が確認できた。しかも、鋳造製品の肌は黒鉛を含有する実施例６、７が優れていた。粉体を含有しない実施例１，２，３の場合より、粉体を含有する実施例６，７の方が鋳造製品の肌には良い。粉体を含有する金型鋳造用潤滑離型剤の場合、油分と鋳造製品の間に空隙ができ、油分で生成したガスが逃げたことによる鋳巣生成の低下が鋳造製品の肌に現れたと考えられる。特に、黒鉛の場合、光沢が良かった。他の粉体（Ｆ−１成分）は硬く、鋳造製品の表面に若干梨地模様が形成され曇り気味となり、若干光沢が減ったものと推定される。 Even in the evaluation by the moldability evaluation tester, 18 mold release lubricants containing the powders of Examples 6, 7, and 8 flowed, and good performance was confirmed. And the skin of the cast product was excellent in Examples 6 and 7 containing graphite. Examples 6 and 7 containing powder are better for the skin of the cast product than in Examples 1, 2 and 3 containing no powder. In the case of a lubricating mold release agent for mold casting containing powder, a gap is formed between the oil and the cast product, and a decrease in the formation of the cast hole due to escape of the gas generated by the oil appears on the skin of the cast product. Conceivable. In particular, the gloss of graphite was good. The other powders (F-1 component) are hard, and it is presumed that a slightly satin pattern is formed on the surface of the cast product and becomes cloudy, and the gloss is slightly reduced.

本発明の金型鋳造用潤滑離型剤は、重力鋳造する際の自動連続スプレー及び原液・微量塗布に適し、金型表面の潤滑にも適している。また、水溶性塗型剤を使っている低圧鋳造では、溶湯の速度が重力鋳造より若干速いため、潤滑離型剤が高温に接する時間は短くなるので、低圧鋳造にも、本油性潤滑離型剤は適している。更に、本金型鋳造用潤滑離型剤は、鋳造毎或いは１回置き或いは２回置きに金型内面に塗布するのに適している。 The lubrication mold release agent for mold casting of the present invention is suitable for automatic continuous spraying during gravity casting, coating of undiluted solution and trace amount, and also suitable for lubrication of the mold surface. In low-pressure casting using water-soluble coating agents, the speed of the molten metal is slightly faster than that of gravity casting, so the time during which the lubricant release agent is in contact with the high temperature is shortened. The agent is suitable. Furthermore, the lubricating mold release agent for mold casting is suitable for application to the inner surface of the mold every casting or once or twice.

なお、本発明は、上記実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、上記実施形態に開示されている複数の構成要素の適宜な組み合せにより種々の発明を形成できる。例えば、実施形態に示される全構成要素から幾つかの構成要素を削除しても良い。具体的には、金型鋳造用潤滑離型剤に使用した各種の材料や配合量は、上述した「発明を実施するための最良の形態」の欄に記載した範囲内で適宜設定することができる。更に、異なる実施形態に亘る構成要素を削除しても良い。更には、異なる実施形態に亘る構成要素を適宜組み合せてもよい。 Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, you may delete some components from all the components shown by embodiment. Specifically, various materials and blending amounts used for the lubricant mold release agent for die casting may be appropriately set within the range described in the above-mentioned column “Best Mode for Carrying Out the Invention”. it can. Furthermore, constituent elements over different embodiments may be deleted. Furthermore, you may combine the component covering different embodiment suitably.

図１は、湯流れ試験器の概略的な斜視図を示す。FIG. 1 shows a schematic perspective view of a hot water flow tester. 図２は、図１の湯流れ試験器の一構成である台の説明図を示す。FIG. 2 is an explanatory view of a table which is one configuration of the hot water flow tester of FIG. 図３は、図１の湯流れ試験器の一構成である蓋の説明図を示す。FIG. 3 is an explanatory diagram of a lid which is one configuration of the hot water flow tester of FIG. 図４は、図１の湯流れ試験器の一構成である枡の説明図を示す。FIG. 4 is an explanatory view of a bowl which is one configuration of the hot water flow tester of FIG. 図５は、図１の湯流れ試験器の一構成である棒の説明図を示す。FIG. 5 is an explanatory view of a bar which is one configuration of the hot water flow tester of FIG. 図６は、成形性評価試験器に使用される第１の金型の説明図を示す。FIG. 6 is an explanatory diagram of a first mold used in the moldability evaluation tester. 図７は、成形性評価試験器に使用される第２の金型の説明図を示す。FIG. 7 shows an explanatory diagram of a second mold used in the moldability evaluation tester. 図８は、第１の金型及び第２の金型を加熱する時の説明図を示す。FIG. 8 is an explanatory diagram when heating the first mold and the second mold. 図９は、第１の金型及び第２の金型を一体化したときの状態を示す。FIG. 9 shows a state when the first mold and the second mold are integrated. 図１０は、第１の金型に固化した製品の平面図を示す。FIG. 10 shows a plan view of the product solidified in the first mold. 図１１は、実施例２により得られた製品の写真を模式的に描いた図を示す。FIG. 11 schematically shows a photograph of the product obtained in Example 2.

符号の説明Explanation of symbols

１…台、１ａ…突出部、１ｂ，２ａ…テーパ面、２…蓋、２ｂ，２ｃ…溝、３…枡、４…棒、５…ガスバーナー、６…把手、７…開口部、８…穴、１１…第１の金型、１２…湯口、１３…キャビティ部、１４，１４ａ，１４ｂ，１４ｃ，１４ｄ，１４ｅ…セル、１５…第２の金型、１６…ガスバーナー、１７…柄杓、１８…溶湯、１９…鋳造品、２０，２０_１〜２０_１２…部位。 DESCRIPTION OF SYMBOLS 1 ... Stand, 1a ... Projection part, 1b, 2a ... Tapered surface, 2 ... Cover, 2b, 2c ... Groove, 3 ... Rod, 4 ... Bar, 5 ... Gas burner, 6 ... Handle, 7 ... Opening, 8 ... Hole 11, first mold 12, gate 12, cavity portion 14, 14 a, 14 b, 14 c, 14 d, 14 e cell 15, second mold 16, gas burner 17, handle 18 ... molten metal, 19 ... cast product, 20, 20 _{1 to} 20 ₁₂ ... part.

Claims

（Ａ）４０℃における動粘度が２〜１０ｍｍ^２／ｓで引火点が７０℃〜１６０℃の範囲の溶剤を５０〜９０質量％、（Ｂ）４０℃における動粘度が１００ｍｍ^２／ｓ以上６００ｍｍ^２／ｓ以下の高粘度の鉱油及び／又は合成油を１〜１０質量％、（Ｃ）濡れ性を向上するためのアクリル・コポリマー、引火点が１００℃以下のアクリル変性ポリシロキサン及び極圧剤の群れから選ばれる1種または２種以上の成分を０．１〜３質量％、（Ｄ）高温で焼付を防止するための４０℃における動粘度が１５０ｍｍ^２／ｓ以上のシリコーン油（Ｄ−１成分）を１５質量％以下及び潤滑性能を有する１種類以上の添加剤（Ｄ−２成分）を１〜１０質量％含み、引火点が７０〜１６０℃であることを特徴とする金型鋳造用潤滑離型剤。 (A) 50 to 90% by mass of a solvent having a kinematic viscosity at 40 ° C. of ² to 10 mm ² / s and a flash point of 70 to 160 ° C., and (B) a kinematic viscosity at 40 ° C. of 100 mm ² / s to 600 mm. 1 to 10% by mass of a high viscosity mineral oil and / or synthetic oil of ² / s or less, (C) an acrylic copolymer for improving wettability, an acrylic-modified polysiloxane having a flash point of 100 ° C. or less, and an extreme pressure agent (1) A silicone oil having a kinematic viscosity at 40 ° C. of 150 mm ² / s or more for preventing seizure at a high temperature (D−). 1 component) 15% by mass or less and one or more additives (D-2 component) having a lubricating performance of 1 to 10% by mass and having a flash point of 70 to 160 ° C. Lubricating mold release agent.

（Ｅ）成分として、アミン系、フェノール系、クレゾール系酸化防止剤からなる群から選ばれる１種又は２種以上を０．２〜２質量％含むことを特徴とする請求項１記載の金型鋳造用潤滑離型剤。 2. The mold according to claim 1, comprising 0.2 to 2 mass% of one or more selected from the group consisting of amine-based, phenol-based and cresol-based antioxidants as component (E). Lubricating mold release agent for casting.

（Ｆ）成分として、白色又は灰色又は赤色の少なくとも１種類の無機粉体を１〜１０質量％と、黒鉛又はカーボンブラック又はダイヤモンド粉の少なくとも１種類の無機粉体を１０質量％以下含有することを特徴とする請求項１若しくは請求項２記載の金型鋳造用潤滑離型剤。 As component (F), 1 to 10% by mass of at least one inorganic powder of white, gray or red and 10% by mass or less of at least one inorganic powder of graphite, carbon black or diamond powder. The lubricating mold release agent for die casting according to claim 1 or 2, characterized in that:

請求項１乃至請求項３いずれか記載の金型鋳造用潤滑離型剤を、鋳造毎あるいは１回置きあるいは２回置きに金型内面に塗布することを特徴とする金型鋳造用潤滑離型剤の塗布方法。 A lubricated mold release agent for mold casting according to any one of claims 1 to 3, wherein the lubricant mold release agent for mold casting is applied to the inner surface of the mold every casting, once or twice. Agent application method.