JP5875862B2 - Release agent - Google Patents
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- JP5875862B2 JP5875862B2 JP2011289643A JP2011289643A JP5875862B2 JP 5875862 B2 JP5875862 B2 JP 5875862B2 JP 2011289643 A JP2011289643 A JP 2011289643A JP 2011289643 A JP2011289643 A JP 2011289643A JP 5875862 B2 JP5875862 B2 JP 5875862B2
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Description
本発明は、鋳造における成形品の離型を目的として金型に塗布されて使用される離型剤に関する。特にダイカスト用離型剤に関する。 The present invention relates to a mold release agent that is applied to a mold for the purpose of releasing a molded product in casting. In particular, it relates to a mold release agent for die casting.
従来から、鋳造では金型に製品が付着しないように離型剤が用いられている。特にダイカスト鋳造では、アルミニウム合金などの溶湯と金型との反応による焼き付きを防止し連続鋳造を可能とするため、および金型と製品との間の潤滑不足による型残りや変形などを防止するため、型開き後に金型内面に離型剤を吹き付け塗布し、離型皮膜を形成し、金型表面の潤滑を行っていた。
この離型剤の吹き付け塗布は、ダイカスト鋳造において製品の品質を左右する重要な工程の一つである。
Conventionally, a mold release agent is used in casting so that the product does not adhere to the mold. In particular, in die casting, in order to prevent seizure due to the reaction between molten metal such as an aluminum alloy and the mold and enable continuous casting, and to prevent mold residue and deformation due to insufficient lubrication between the mold and the product. After the mold was opened, a release agent was sprayed onto the inner surface of the mold to form a release film, and the mold surface was lubricated.
This spray application of a release agent is one of the important processes that influence the quality of products in die casting.
ところで、離型剤を金型内面に吹き付け塗布して、離型皮膜を形成する工程において、離型剤の塗りムラが生じることある。特に複雑な形状の金型の場合、離型剤が充分に均一に塗布されにくいという問題がある。
この問題を解決するために、例えばダイカスト用離型剤において、塗布状態を確認する手段として光顔料を発色剤として含むという提案がなされている（例えば、特許文献１参照。）。
この特許文献１中には、光顔料として、有機物系の蛍光顔料を用いることが提案されている。しかしながら、有機物系の蛍光顔料は温度上昇により発光しなくなる問題や、蛍光体自体が分解してしまう問題がある。実際に特許文献１の出願人の製品においても、２５０℃以下でないと蛍光が観察できないという問題がある。
一般的な金型の使用温度は３００℃〜４００℃程度と言われており、少なくともこの使用温度の範囲においても塗布状態が確認できる離型剤が求められている。
By the way, in the process of spraying and applying the release agent to the inner surface of the mold to form the release film, uneven application of the release agent may occur. In particular, in the case of a mold having a complicated shape, there is a problem that it is difficult to apply the release agent sufficiently uniformly.
In order to solve this problem, for example, in a mold release agent for die casting, a proposal has been made that a photopigment is included as a color former as a means for confirming the application state (for example, see Patent Document 1).
In this patent document 1, it is proposed to use an organic fluorescent pigment as a light pigment. However, organic fluorescent pigments have a problem that they do not emit light due to a temperature rise and a problem that the phosphor itself is decomposed. In fact, the product of the applicant of Patent Document 1 also has a problem that fluorescence cannot be observed unless it is 250 ° C. or lower.
The use temperature of a general mold is said to be about 300 ° C. to 400 ° C., and there is a demand for a mold release agent that can confirm the coating state even at least within this use temperature range.
このように、従来あるダイカスト用離型剤では、一般的な金型の使用温度である３００℃〜４００℃において、蛍光による塗布状態の確認ができないという問題がある。
本発明は、この問題を鑑み、金型が少なくとも３００℃〜４００℃という高温の温度範囲にあっても、蛍光発光により塗布状態の確認が可能となる離型剤の提供を目的とする。
As described above, the conventional die-casting mold release agent has a problem that the application state by fluorescence cannot be confirmed at a general mold use temperature of 300 to 400 ° C.
In view of this problem, an object of the present invention is to provide a mold release agent that enables the application state to be confirmed by fluorescence even when the mold is in a high temperature range of at least 300 ° C to 400 ° C.
発明者らは、上記の課題を解決するために種々の検討を行った結果、次に掲げる群から選ばれる無機蛍光体を用いた場合に、少なくとも３００℃〜４００℃の温度範囲においても、蛍光発光により塗布状態の確認が可能な離型剤となることを見出した。 As a result of various studies to solve the above-mentioned problems, the inventors have found that when an inorganic phosphor selected from the following group is used, even in a temperature range of at least 300 ° C. to 400 ° C. It has been found that it becomes a mold release agent whose application state can be confirmed by light emission.
第１の発明の離型剤は、次に掲げる無機蛍光体の群から選ばれる少なくとも一つを含むことを特徴としている；
（Ｂａ，Ｍｇ）２Ａｌ１６Ｏ２４：Ｅｕ、（Ｓｒ，Ｂａ，Ｃａ）５（ＰＯ４）３Ｃｌ：Ｅｕ、Ｓｒ４Ａｌ１４Ｏ２５：Ｅｕ、Ｓｒ３Ｓｉ３Ｏ８Ｃｌ２：Ｅｕ、Ｓｒ４Ｓｉ３Ｏ８Ｃｌ４：Ｅｕ、ＢａＭｇ２Ａｌ１６Ｏ２７：Ｅｕ，Ｍｎ、（Ｂａ，Ｍｇ）２Ａｌ１６Ｏ２４：Ｅｕ，Ｍｎ、Ｙ２ＳｉＯ５：Ｃｅ，Ｔｂ、ＹＭｇＢ５Ｏ１０：Ｃｅ，Ｔｂ、ＬａＰＯ４：Ｃｅ，Ｔｂ、Ｙ３Ａｌ５Ｏ１２：Ｃｅ、ＹＶＯ４：Ｅｕ、Ｙ（Ｐ，Ｖ）Ｏ４：Ｅｕ、（Ｓｒ，Ｍｇ）３（ＰＯ４）２：Ｓｎ、３．５ＭｇＯ・０．５ＢｅＯ・ＧｅＯ２：Ｍｎ、３．５ＭｇＯ・０．５ＭｇＦ２・ＧｅＯ２：Ｍｎ。
そして、これら無機蛍光体は、常温はもとより３００℃〜４００℃といった高温状態でも紫外線の照射により発光するため、これらを含む離型剤は３００℃〜４００℃の温度範囲においても、蛍光発光により塗布状態の確認が可能となる優れた特性を有する離型剤となる。
なお、上記無機蛍光体の母体を構成する元素の一部を他の元素に置き換えたとしても、同様に用いることができる。
第２の発明の離型剤は、上記無機蛍光体の粒径がＤ５０において０．１μｍ以上５０μｍ以下の微粒子であることを特徴としている。そして、この範囲の粒径の微粒子とすることにより、離型剤中の無機蛍光体の分散性が良好となり蛍光発光強度に優れた、バランスが良い離型剤となる。
第３の発明の離型剤は、上記無機蛍光体の粒子形状粒が略球形状であり、粒子の長径をａ、短径をｂとすると、０．６≦（ｂ／ａ）≦１であることを特徴としている。そして、粒子形状を略球形状とすることにより、離型剤中の無機蛍光体の分散性が良好となり、吹き付け塗布する際の均一性が良好な離型剤となる。
The mold release agent of the first invention is characterized by containing at least one selected from the group of inorganic phosphors listed below;
(Ba, Mg) 2 Al 16 O 24: Eu, (Sr, Ba, Ca) 5 (PO 4) 3 Cl: Eu, Sr 4 Al 14 O 25: Eu, Sr 3 Si 3 O 8 Cl 2: Eu, Sr 4 Si 3 O 8 Cl 4 : Eu, BaMg 2 Al 16 O 27 : Eu, Mn, (Ba, Mg) 2 Al 16 O 24 : Eu, Mn, Y 2 SiO 5 : Ce, Tb, YMgB 5 O 10 : Ce, Tb, LaPO 4: Ce, Tb, Y 3 Al 5 O 12: Ce, YVO 4: Eu, Y (P, V) O 4: Eu, (Sr, Mg) 3 (PO 4) 2: Sn 3.5MgO · 0.5BeO · GeO 2 : Mn, 3.5MgO · 0.5MgF 2 · GeO 2 : Mn.
And since these inorganic fluorescent substance light-emits by irradiation of an ultraviolet-ray not only in normal temperature but 300 degreeC-400 degreeC, the mold release agent containing these is apply | coated by fluorescence emission also in the temperature range of 300 degreeC-400 degreeC. It becomes a mold release agent which has the outstanding characteristic which can confirm a state.
In addition, even if some of the elements constituting the matrix of the inorganic phosphor are replaced with other elements, the same can be used.
The release agent of the second invention is characterized in that the particle size of the inorganic phosphor is a fine particle having a D 50 of 0.1 μm or more and 50 μm or less. And by setting it as the fine particle of the particle size of this range, the dispersibility of the inorganic fluorescent substance in a mold release agent will become favorable, and it will become a mold release agent with a sufficient balance which was excellent in fluorescence emission intensity.
In the release agent of the third invention, when the particle shape particle of the inorganic phosphor is substantially spherical and the major axis of the particle is a and the minor axis is b, 0.6 ≦ (b / a) ≦ 1. It is characterized by being. And by making particle shape into a substantially spherical shape, the dispersibility of the inorganic fluorescent substance in a mold release agent becomes favorable, and it becomes a mold release agent with the favorable uniformity at the time of spray coating.
本発明の離型剤によれば、常温から高温、特に３００℃〜４００℃といった高温状態でも、紫外線の照射により発光する優れた特性を有しており、金型温度が３００℃〜４００℃という高温状態においても蛍光発光により塗布状態の確認が可能となる優れた特性を有する離型剤を得ることができる。 According to the mold release agent of the present invention, it has an excellent property of emitting light by irradiation with ultraviolet rays even in a high temperature state of room temperature to high temperature, particularly 300 ° C. to 400 ° C., and the mold temperature is 300 ° C. to 400 ° C. It is possible to obtain a release agent having excellent characteristics that enables the application state to be confirmed by fluorescence emission even at a high temperature.
以下、本発明の実施の形態について説明する。
本発明の離型剤は、吹き付け等の手段により金型の内面に塗布され付着される。このとき、本発明の離型剤は特定の無機蛍光体を含有しているため、紫外線等の光の刺激により蛍光を発する。本発明の離型剤を金型へ吹き付ける際または吹き付けた後に、紫外線等の光を照射すると、金型に付着した離型剤の量に比例して発せられる蛍光の強度が変化する。
このため、金型に対して離型剤が均一に塗布されているか、塗りムラが無いかどうかを、肉眼による視認または光学的手段（例えばビデオカメラ等の撮像手段）により確認することができる。
Embodiments of the present invention will be described below.
The release agent of the present invention is applied and adhered to the inner surface of the mold by means such as spraying. At this time, since the release agent of the present invention contains a specific inorganic phosphor, it emits fluorescence upon stimulation of light such as ultraviolet rays. When the release agent of the present invention is sprayed on or after spraying the mold, the intensity of fluorescence emitted changes in proportion to the amount of the mold release agent attached to the mold.
For this reason, it can be confirmed by visual observation or optical means (for example, imaging means such as a video camera) whether the release agent is uniformly applied to the mold or whether there is no coating unevenness.
紫外線等の光源としては、例えば３６５ｎｍ付近に発光ピーク波長を有するブラックライトを好適に用いることができる。このほか、２９０ｎｍ〜３１０ｎｍ付近に発光ピーク波長を有する、いわゆるＵＶ−Ｂランプや、２５４ｎｍ付近の波長を発する殺菌ランプなどを用いることもできる。 As a light source such as ultraviolet light, for example, black light having an emission peak wavelength in the vicinity of 365 nm can be suitably used. In addition, a so-called UV-B lamp having an emission peak wavelength in the vicinity of 290 nm to 310 nm, a sterilizing lamp emitting a wavelength in the vicinity of 254 nm, and the like can also be used.
無機蛍光体としては、次に掲げる群の蛍光体が、常温はもとより３００℃〜４００℃といった高温状態でも紫外線等により効率良く発光するため、好適に用いることができる。
青色発光：（Ｂａ，Ｍｇ）２Ａｌ１６Ｏ２４：Ｅｕ
青緑色発光：（Ｓｒ，Ｂａ，Ｃａ）５（ＰＯ４）３Ｃｌ：Ｅｕ、Ｓｒ４Ａｌ１４Ｏ２５：Ｅｕ、Ｓｒ３Ｓｉ３Ｏ８Ｃｌ２：Ｅｕ、Ｓｒ４Ｓｉ３Ｏ８Ｃｌ４：Ｅｕ
緑色発光：ＢａＭｇ２Ａｌ１６Ｏ２７：Ｅｕ，Ｍｎ、（Ｂａ，Ｍｇ）２Ａｌ１６Ｏ２４：Ｅｕ，Ｍｎ、Ｙ２ＳｉＯ５：Ｃｅ，Ｔｂ、ＹＭｇＢ５Ｏ１０：Ｃｅ，Ｔｂ、ＬａＰＯ４：Ｃｅ，Ｔｂ
黄色発光：Ｙ３Ａｌ５Ｏ１２：Ｃｅ
赤色発光：ＹＶＯ４：Ｅｕ、Ｙ（Ｐ，Ｖ）Ｏ４：Ｅｕ、（Ｓｒ，Ｍｇ）３（ＰＯ４）２：Ｓｎ、３．５ＭｇＯ・０．５ＢｅＯ・ＧｅＯ２：Ｍｎ、３．５ＭｇＯ・０．５ＭｇＦ２・ＧｅＯ２：Ｍｎ
上記いずれの無機蛍光体でも、好適に用いることができるが、特に緑色および黄色に発光をする無機蛍光体であれば、視感度が高い蛍光を有するため、視感輝度が高く、視認しやすく、より好適に用いることができる。
また、紫外線光源としてブラックライトを用いた場合、紫外線とともに青色領域の光も照射されるため、青色の中で対比して確認しやすい黄色から赤色に発光する無機蛍光体、例えばＹ３Ａｌ５Ｏ１２：Ｃｅ、ＹＶＯ４：Ｅｕ、Ｙ（Ｐ，Ｖ）Ｏ４：Ｅｕ、（Ｓｒ，Ｍｇ）３（ＰＯ４）２：Ｓｎ等の蛍光体が視認しやすく、好適に用いることができる。
As the inorganic phosphor, the following groups of phosphors can be suitably used because they emit light efficiently by ultraviolet rays or the like even at a high temperature state of 300 ° C. to 400 ° C. as well as normal temperature.
Blue emission: (Ba, Mg) 2 Al 16 O 24: Eu
Blue-green light emission: (Sr, Ba, Ca) 5 (PO 4 ) 3 Cl: Eu, Sr 4 Al 14 O 25 : Eu, Sr 3 Si 3 O 8 Cl 2 : Eu, Sr 4 Si 3 O 8 Cl 4 : Eu
Green emission: BaMg 2 Al 16 O 27: Eu, Mn, (Ba, Mg) 2 Al 16 O 24: Eu, Mn, Y 2 SiO 5: Ce, Tb, YMgB 5 O 10: Ce, Tb, LaPO 4: Ce, Tb
Yellow light emission: Y 3 Al 5 O 12 : Ce
Red light emission: YVO 4 : Eu, Y (P, V) O 4 : Eu, (Sr, Mg) 3 (PO 4 ) 2 : Sn, 3.5MgO · 0.5BeO · GeO 2 : Mn, 3.5MgO · 0.5MgF 2 · GeO 2 : Mn
Any of the above inorganic phosphors can be suitably used, but in particular, if the inorganic phosphor emits light in green and yellow, since it has high visibility, the luminance is high and easy to visually recognize, It can be used more suitably.
In addition, when black light is used as an ultraviolet light source, light in the blue region is also emitted together with ultraviolet light. Therefore, an inorganic phosphor that emits light from yellow to red, for example, Y 3 Al 5 O, which is easy to confirm in blue. Phosphors such as 12 : Ce, YVO 4 : Eu, Y (P, V) O 4 : Eu, (Sr, Mg) 3 (PO 4 ) 2 : Sn are easily visible and can be suitably used.
無機蛍光体の粒径は、無機蛍光体の種類、ベースとなる離型剤の組成および金型等の相性により、適宜選択することができる。実際には、無機蛍光体の粒径はＤ５０において０．１μｍ〜５０μｍ程度の範囲の微粒子が好ましい。粒径が大きすぎると離型剤に均一に分散しにくくなったり、吹き付け塗布等する際の液滴が大きくなりすぎたり、吹き付け塗布するノズルが詰まる等の悪影響を及ぼす傾向がある。粒径が小さくなりすぎると、発光輝度が著しく低下する傾向がある。
無機蛍光体の粒子形状は、分散性や吹き付け塗布する際の均一性を鑑みると、略球形状のものがより好ましい。ここで略球形状の長径をａ、短径をｂとすると、（ｂ／ａ）は０．６以上が好ましく、１に近いほうがより好ましい。
（ｂ／ａ）を測定するには、例えば電子顕微鏡写真により無機蛍光体粒子を撮影し、顕微鏡写真より複数個の長径ａと短径ｂを測定し、（ｂ／ａ）の平均値を求める方法がある。
略球形状の粒子形状を有する無機蛍光体を得るには様々な手段があるが、例えば蛍光体材料を溶液にして混合し、噴霧等により液滴状のまま乾燥あるいは焼成まで行う方法や、蛍光体材料の中で母体の主要部分となる材料の粒子径状をあらかじめ略球状のものを採用する方法等が有効である。
The particle size of the inorganic phosphor can be appropriately selected depending on the type of the inorganic phosphor, the composition of the base release agent, and the compatibility of the mold and the like. Actually, the particle diameter of the inorganic phosphor is preferably a fine particle having a D 50 in the range of about 0.1 μm to 50 μm. If the particle size is too large, it tends to be adversely affected such that it is difficult to uniformly disperse in the release agent, the droplets during spray coating become too large, or the nozzle for spray coating is clogged. If the particle size becomes too small, the emission luminance tends to be significantly reduced.
In view of dispersibility and uniformity during spray coating, the particle shape of the inorganic phosphor is more preferably substantially spherical. Here, when the major axis of the substantially spherical shape is a and the minor axis is b, (b / a) is preferably 0.6 or more, more preferably close to 1.
In order to measure (b / a), for example, inorganic phosphor particles are photographed with an electron micrograph, a plurality of major diameters a and minor diameters b are measured from the micrograph, and an average value of (b / a) is obtained. There is a way.
There are various means for obtaining an inorganic phosphor having a substantially spherical particle shape. For example, the phosphor material is mixed in a solution and then dried or fired in the form of droplets by spraying or the like. Among the body materials, a method of adopting an approximately spherical particle diameter in advance for the material that is the main part of the matrix is effective.
ベースとなる離型剤は、従来から鋳造用離型剤として用いられているものを、目的に応じて適宜選択できる。例えば、離型潤滑成分として例えばシリコーン油や有機モリブデン化合物などと、媒体として例えば鉱物油や合成油などの油脂類（例えばスピンドル系油やマシン油など）または溶剤などを適宜充分に混合したものを使用できる。 As the base mold release agent, those conventionally used as mold release agents for casting can be appropriately selected according to the purpose. For example, a silicone oil or an organomolybdenum compound or the like as a release lubricant component and a fat and oil such as a mineral oil or a synthetic oil (for example, spindle oil or machine oil) or a solvent as a medium are mixed appropriately and appropriately. Can be used.
ベースとなる離型剤と前述の無機蛍光体とを充分に混合し、分散させて本発明の離型剤となる。
無機蛍光体の含有量は、無機蛍光体の種類や粒径、ベースとなる離型剤の組成、離型剤の塗布量および使用する金型等の相性などにより、適宜調整し決定できる。
照射する紫外線の強さが一定で塗布量も一定であれば、無機蛍光体の含有量が多いほど、強く蛍光を発する。また、無機蛍光体の含有量が一定で、塗布量が一定であれば、照射する紫外線の強度を強くすれば、強い蛍光を発する。
すなわち、さまざまな制約で仮に離型剤中に含まれる無機蛍光体の含有量が少なくなった場合でも、照射する紫外線強度を強くすれば、離型剤の塗布状態に応じた蛍光が観察可能である。
The base release agent and the above-described inorganic phosphor are sufficiently mixed and dispersed to form the release agent of the present invention.
The content of the inorganic phosphor can be appropriately adjusted and determined depending on the type and particle size of the inorganic phosphor, the composition of the base mold release agent, the coating amount of the mold release agent, the compatibility of the mold used, and the like.
If the intensity of ultraviolet rays to be irradiated is constant and the coating amount is also constant, the higher the content of the inorganic phosphor, the stronger the fluorescence. Further, if the content of the inorganic phosphor is constant and the coating amount is constant, strong fluorescence is emitted by increasing the intensity of the irradiated ultraviolet light.
In other words, even if the content of the inorganic phosphor contained in the release agent is reduced due to various restrictions, it is possible to observe fluorescence according to the application state of the release agent by increasing the intensity of the irradiated ultraviolet light. is there.
なお、これまでダイカスト用離型剤として本発明の離型剤を説明してきたが、本発明の離型剤はダイカスト法に限らず、その他の鋳造法、押し出し成型、圧延プレス成型、インジェクション成型、スクイズキャスティング成型にも好適に使用することができる。 In addition, although the mold release agent of the present invention has been described so far as the mold release agent for die casting, the mold release agent of the present invention is not limited to the die casting method, other casting methods, extrusion molding, rolling press molding, injection molding, It can also be suitably used for squeeze casting.
次に、本発明の実施例について説明する。なお、以下の実施例は本発明の好適な例を示したものに過ぎず、本発明はこれら実施例に限定されるものではない。 Next, examples of the present invention will be described. It should be noted that the following examples merely show preferred examples of the present invention, and the present invention is not limited to these examples.
実施例１の離型剤に用いる無機蛍光体は、Ｙ３Ａｌ５Ｏ１２：Ｃｅ蛍光体を用いた。この無機蛍光体は略球状の粒子径状を有し、粒径はＤ５０において８．６μｍであった。電子顕微鏡写真で確認した（ｂ／ａ）の平均値は０．８９であった。
上記Ｙ３Ａｌ５Ｏ１２：Ｃｅ蛍光体を０．５質量％、スピンドル油８７．５質量％、高粘度鉱油５質量％、ナタネ油１質量％、シリコーン油５質量％、有機モリブデン１質量％の比率で充分に混合し、本発明の実施例１の離型剤とした。
Y 3 Al 5 O 12 : Ce phosphor was used as the inorganic phosphor used in the release agent of Example 1. The inorganic phosphor has a substantially spherical particles径状and a particle size of 8.6μm in D 50. The average value of (b / a) confirmed by the electron micrograph was 0.89.
0.5% by mass of the above Y 3 Al 5 O 12 : Ce phosphor, 87.5% by mass of spindle oil, 5% by mass of high viscosity mineral oil, 1% by mass of rapeseed oil, 5% by mass of silicone oil, 1% by mass of organic molybdenum The release agent of Example 1 of the present invention was sufficiently mixed.
評価のため、加熱した金型の代わりに４００℃に加熱した鋼板を用意し、これに実施例１の離型剤を吹き付け塗布した。その後にブラックライトで紫外線を照射し、目視で観察した。その結果、実施例１の離型剤を吹き付け塗布した箇所で、黄色の発光を視認することができ、その蛍光から離型剤の塗布状況を確認することができた。 For evaluation, a steel plate heated to 400 ° C. was prepared instead of the heated mold, and the release agent of Example 1 was sprayed and applied thereto. Thereafter, ultraviolet rays were irradiated with a black light and observed visually. As a result, yellow light emission could be visually recognized at the place where the release agent of Example 1 was sprayed and applied, and the application state of the release agent could be confirmed from the fluorescence.
実施例２の離型剤に用いる無機蛍光体は、ＹＶＯ４：Ｅｕ蛍光体を用いた。この無機蛍光体は略球状の粒子径状を有し、粒径はＤ５０において０．６μｍであった。電子顕微鏡写真で確認した（ｂ／ａ）の平均値は０．９２であった。
上記ＹＶＯ４：Ｅｕ蛍光体を１質量％、イソパラフィン系溶剤８７質量％、高粘度鉱油５質量％、ナタネ油１質量％、シリコーン油５質量％、有機モリブデン１質量％の比率で充分に混合し、本発明の実施例２の離型剤とした。
YVO 4 : Eu phosphor was used as the inorganic phosphor used in the release agent of Example 2. The inorganic phosphor has a substantially spherical particles径状and a particle size of 0.6μm in D 50. The average value of (b / a) confirmed by an electron micrograph was 0.92.
The above YVO 4 : Eu phosphor was thoroughly mixed at a ratio of 1% by mass, 87% by mass of an isoparaffin solvent, 5% by mass of high viscosity mineral oil, 1% by mass of rapeseed oil, 5% by mass of silicone oil, and 1% by mass of organic molybdenum. The release agent of Example 2 of the present invention was used.
評価のため、実施例１と同様に３５０℃に加熱した鋼板を用意し、これに実施例２の離型剤を吹き付け塗布した。その後にブラックライトで紫外線を照射し、目視で観察した。その結果、実施例２の離型剤を吹き付け塗布した箇所で、赤色の発光を視認することができ、その蛍光から離型剤の塗布状況を確認することができた。
なお、実施例２に用いたＹＶＯ４：Ｅｕ蛍光体は、室温から高温になるに伴い３６５ｎｍの紫外線励起による発光効率が大幅に高まり、約３００℃〜３５０℃付近で最高の発光効率となる。このことから、本発明の３００〜４００℃といった高温状態における使用用途に適している。
For evaluation, a steel plate heated to 350 ° C. was prepared in the same manner as in Example 1, and the release agent of Example 2 was sprayed and applied thereto. Thereafter, ultraviolet rays were irradiated with a black light and observed visually. As a result, it was possible to visually recognize red light emission at the place where the release agent of Example 2 was sprayed and applied, and the application state of the release agent could be confirmed from the fluorescence.
Note that the YVO 4 : Eu phosphor used in Example 2 significantly increases the luminous efficiency due to ultraviolet excitation at 365 nm as the temperature rises from room temperature to high temperature, and reaches the highest luminous efficiency at about 300 ° C. to 350 ° C. From this, it is suitable for the use use in the high temperature state of 300-400 degreeC of this invention.
実施例３の離型剤に用いる無機蛍光体は、（Ｓｒ，Ｍｇ）３（ＰＯ４）２：Ｓｎ蛍光体を用いた。この無機蛍光体は略球状の粒子径状を有し、粒径はＤ５０において３２μｍであった。電子顕微鏡写真で確認した（ｂ／ａ）の平均値は０．６８であった。
上記（Ｓｒ，Ｍｇ）３（ＰＯ４）２：Ｓｎ蛍光体を２質量％、イソパラフィン系溶剤８６質量％、高粘度鉱油５質量％、ナタネ油１質量％、シリコーン油５質量％、有機モリブデン１質量％の比率で充分に混合し、本発明の実施例３の離型剤とした。
As the inorganic phosphor used in the release agent of Example 3, (Sr, Mg) 3 (PO 4 ) 2 : Sn phosphor was used. The inorganic phosphor has a substantially spherical particles径状, particle size was 32μm in D 50. The average value of (b / a) confirmed by an electron micrograph was 0.68.
2% by mass of the above (Sr, Mg) 3 (PO 4 ) 2 : Sn phosphor, 86% by mass of isoparaffinic solvent, 5% by mass of high viscosity mineral oil, 1% by mass of rapeseed oil, 5% by mass of silicone oil, and organic molybdenum 1 The mixture was sufficiently mixed at a mass% ratio to obtain a release agent of Example 3 of the present invention.
評価のため、実施例１と同様に３００℃に加熱した鋼板を用意し、これに実施例３の離型剤を吹き付け塗布した。その後にブラックライトで紫外線を照射し、目視で観察した。その結果、実施例３の離型剤を吹き付け塗布した箇所で、オレンジ色から赤色の発光を視認することができ、その蛍光から離型剤の塗布状況を確認することができた。
なお、実施例３に用いた（Ｓｒ，Ｍｇ）３（ＰＯ４）２：Ｓｎ蛍光体は、室温から高温になるに伴い発光色が短波長側にシフトするため、実質的な視感輝度が高まる。このことから、本発明の３００〜４００℃といった高温状態における使用用途に適している。
For evaluation, a steel plate heated to 300 ° C. was prepared in the same manner as in Example 1, and the release agent of Example 3 was sprayed and applied thereto. Thereafter, ultraviolet rays were irradiated with a black light and observed visually. As a result, it was possible to visually recognize light emission from orange to red at the location where the release agent of Example 3 was sprayed and applied, and the application status of the release agent could be confirmed from the fluorescence.
The (Sr, Mg) 3 (PO 4 ) 2 : Sn phosphor used in Example 3 has a substantial luminous brightness because the emission color shifts to the short wavelength side as the temperature increases from room temperature to high temperature. Rise. From this, it is suitable for the use use in the high temperature state of 300-400 degreeC of this invention.
以上のことから、本発明の離型剤は、３００〜４００℃といった高温状態においてもブラックライトなどの紫外線光源を用いて紫外線を照射することで蛍光を発するため、実際の使用条件温度において、金型内面への離型剤の塗布状況を目視等で確認することができることがわかる。 From the above, the release agent of the present invention emits fluorescence by irradiating ultraviolet rays using an ultraviolet light source such as black light even at a high temperature state of 300 to 400 ° C. It turns out that the application | coating condition of the mold release agent to a type | mold inner surface can be confirmed visually.
本発明の離型剤は、３００℃〜４００℃という高温の温度範囲においても、蛍光発光により塗布状態の確認が可能となる優れた特性を有するため、特に金型温度を下げる必要が無く、金型の実際の使用温度条件においても蛍光発光により塗布状態の確認が可能となるため、高温で成型するダイカスト等の離型剤として好適に用いることができる。 The mold release agent of the present invention has excellent characteristics that enable the application state to be confirmed by fluorescent emission even in a high temperature range of 300 ° C. to 400 ° C. Therefore, it is not necessary to lower the mold temperature in particular. Since the application state can be confirmed by fluorescence emission even under the actual use temperature conditions of the mold, it can be suitably used as a mold release agent such as die casting molded at a high temperature.
Claims (4)
（Ｂａ，Ｍｇ）２Ａｌ１６Ｏ２４：Ｅｕ、（Ｓｒ，Ｂａ，Ｃａ）５（ＰＯ４）３Ｃｌ：Ｅｕ、Ｓｒ４Ａｌ１４Ｏ２５：Ｅｕ、Ｓｒ３Ｓｉ３Ｏ８Ｃｌ２：Ｅｕ、Ｓｒ４Ｓｉ３Ｏ８Ｃｌ４：Ｅｕ、ＢａＭｇ２Ａｌ１６Ｏ２７：Ｅｕ，Ｍｎ、（Ｂａ，Ｍｇ）２Ａｌ１６Ｏ２４：Ｅｕ，Ｍｎ、Ｙ２ＳｉＯ５：Ｃｅ，Ｔｂ、ＹＭｇＢ５Ｏ１０：Ｃｅ，Ｔｂ、ＬａＰＯ４：Ｃｅ，Ｔｂ、Ｙ３Ａｌ５Ｏ１２：Ｃｅ、ＹＶＯ４：Ｅｕ、Ｙ（Ｐ，Ｖ）Ｏ４：Ｅｕ、（Ｓｒ，Ｍｇ）３（ＰＯ４）２：Ｓｎ、３．５ＭｇＯ・０．５ＢｅＯ・ＧｅＯ２：Ｍｎ、３．５ＭｇＯ・０．５ＭｇＦ２・ＧｅＯ２：Ｍｎ。 A mold release agent that is used by adhering to the inner surface of the mold, and includes at least one selected from the group of inorganic phosphors listed below;
(Ba, Mg) 2 Al 16 O 24: Eu, (Sr, Ba, Ca) 5 (PO 4) 3 Cl: Eu, Sr 4 Al 14 O 25: Eu, Sr 3 Si 3 O 8 Cl 2: Eu, Sr 4 Si 3 O 8 Cl 4 : Eu, BaMg 2 Al 16 O 27 : Eu, Mn, (Ba, Mg) 2 Al 16 O 24 : Eu, Mn, Y 2 SiO 5 : Ce, Tb, YMgB 5 O 10 : Ce, Tb, LaPO 4: Ce, Tb, Y 3 Al 5 O 12: Ce, YVO 4: Eu, Y (P, V) O 4: Eu, (Sr, Mg) 3 (PO 4) 2: Sn 3.5MgO · 0.5BeO · GeO 2 : Mn, 3.5MgO · 0.5MgF 2 · GeO 2 : Mn.
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