JP2016093774A - Coating method, coating apparatus and paint for improving heat radiation - Google Patents
Coating method, coating apparatus and paint for improving heat radiation Download PDFInfo
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- JP2016093774A JP2016093774A JP2014230504A JP2014230504A JP2016093774A JP 2016093774 A JP2016093774 A JP 2016093774A JP 2014230504 A JP2014230504 A JP 2014230504A JP 2014230504 A JP2014230504 A JP 2014230504A JP 2016093774 A JP2016093774 A JP 2016093774A
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- 239000003973 paint Substances 0.000 title claims abstract description 58
- 238000000576 coating method Methods 0.000 title claims abstract description 48
- 239000011248 coating agent Substances 0.000 title claims description 21
- 230000005855 radiation Effects 0.000 title abstract 3
- 238000005507 spraying Methods 0.000 claims abstract description 25
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 17
- 239000004917 carbon fiber Substances 0.000 claims abstract description 17
- 230000000737 periodic effect Effects 0.000 claims abstract description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 21
- 230000017525 heat dissipation Effects 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 13
- 239000002987 primer (paints) Substances 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 238000010422 painting Methods 0.000 claims 2
- 230000006866 deterioration Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002904 solvent Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
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- Application Of Or Painting With Fluid Materials (AREA)
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Abstract
Description
本発明は、塗装方法に関し、より詳細には、被塗装物の放熱性を向上させる塗装方法に関する。 The present invention relates to a coating method, and more particularly to a coating method for improving the heat dissipation of an object to be coated.
近年、自動車のヘッドランプのハウジングにおいて、形状の自由度を確保するためにプラスチック化が進んでいるが、そのことが一方で問題を生じさせている。すなわち、ヘッドランプの消費電力は５０Ｗ前後と大きく、その大部分が熱となるところ、プラスチック化による放熱性の悪化により、ハウジングの内部は７０℃以上の高温に達するようになってきており（点灯走行時）、そのことが光軸のずれや配光性能の低下などを引き起こしている。 In recent years, plastics have been developed in automobile headlamp housings in order to ensure the degree of freedom of shape, but this has caused problems. That is, the power consumption of the headlamp is as large as around 50 W, and most of it is heated, and due to the deterioration of heat dissipation due to plasticization, the inside of the housing has reached a high temperature of 70 ° C. or more (lighting) When traveling), this causes a shift in the optical axis and a decrease in light distribution performance.
この点につき、ハウジングの形成材料として、放熱性の高い熱伝導性プラスチック（例えば、特許文献１）を採用するという方策が考えられるが、金属フィラーが高濃度に混入されている熱伝導性プラスチックには、機械特性の低下や成型性の悪化などの問題があるため、ヘッドランプ・ハウジングへの適用は難しい。 In this regard, a measure of adopting a heat conductive plastic (for example, Patent Document 1) with high heat dissipation as a material for forming the housing is conceivable. However, in a heat conductive plastic mixed with a high concentration of metal filler. Is difficult to apply to headlamps and housings due to problems such as deterioration of mechanical properties and deterioration of moldability.
本発明は、上記従来技術における課題に鑑みてなされたものであり、本発明は、被塗装物の放熱性を向上させることができる新規な塗装方法を提供することを目的とする。 This invention is made | formed in view of the subject in the said prior art, and this invention aims at providing the novel coating method which can improve the heat dissipation of to-be-coated object.
本発明者は、被塗装物の放熱性を向上させることができる新規な塗装方法につき鋭意検討した結果、以下の構成に想到し、本発明に至ったのである。 As a result of intensive studies on a novel coating method capable of improving the heat dissipation of the object to be coated, the present inventor has conceived the following configuration and arrived at the present invention.
すなわち、本発明によれば、被塗装物の放熱性を向上させるための塗装方法であって、被塗装面に対して骨材としてピッチ系炭素繊維を含む塗料を吹き付け塗布するステップを含むことを特徴とする塗装方法が提供される。 That is, according to the present invention, it is a coating method for improving the heat dissipation of an object to be coated, and includes a step of spraying and applying a paint containing pitch-based carbon fibers as an aggregate to the surface to be coated. A characteristic coating method is provided.
さらに、本発明によれば、上述した塗装方法を実現するための塗装装置ならびに塗料が提供される。 Furthermore, according to this invention, the coating apparatus and coating material for implement | achieving the coating method mentioned above are provided.
上述したように、本発明によれば、被塗装物の放熱性を向上させることができる新規な塗装方法が提供される。 As described above, according to the present invention, a novel coating method capable of improving the heat dissipation of an object to be coated is provided.
以下、本発明を図面に示した実施の形態をもって説明するが、本発明は、図面に示した実施の形態に限定されるものではない。なお、以下に参照する各図においては、共通する要素について同じ符号を用い、適宜、その説明を省略するものとする。 Hereinafter, the present invention will be described with reference to embodiments shown in the drawings, but the present invention is not limited to the embodiments shown in the drawings. In the drawings referred to below, the same reference numerals are used for common elements, and the description thereof is omitted as appropriate.
（第１実施形態）
以下、図１に基づいて、第１実施形態の塗装方法の各工程を順番に説明する。
(First embodiment)
Hereinafter, based on FIG. 1, each process of the coating method of 1st Embodiment is demonstrated in order.
まず、工程１において、被塗装物１２が用意される。被塗装物１２は、放熱性の向上が要請されるものであればよく、例えば、自動車のヘッドランプ・ハウジングを例示することができる。 First, in step 1, an object to be coated 12 is prepared. The object to be coated 12 only needs to be improved in heat dissipation. For example, a headlamp housing of an automobile can be exemplified.
次に、工程２において、被塗装物１２の被塗装面１２ａに対して、プライマー塗料１４を一様に塗布する。 Next, in step 2, the primer paint 14 is uniformly applied to the surface 12a of the article 12 to be coated.
続く、工程３においては、被塗装面（この場合、プライマー塗料１４を塗布した面）に対して、スプレーガンで線を描くように骨材１７を含む塗料１６を吹き付け塗布することによって、塗料１６による畝状突条を形成する。以下、この畝状突条を“塗料線”として参照する。 In the subsequent step 3, the coating material 16 is sprayed and applied to the surface to be coated (in this case, the surface coated with the primer coating 14) by spraying the coating material 16 including the aggregate 17 so as to draw a line with a spray gun. Forms a saddle-like ridge. Hereinafter, this hook-shaped ridge is referred to as “paint line”.
具体的には、図２（ａ）に示すように、複数のスプレーガン２０を並列配置し、隣接するスプレーガン２０から吐出される塗料の骨材１７の含有率について差が生じるように設定する。例えば、骨材１７を含有する塗料１６を吐出するスプレーガン２０と骨材１７を全く含有しない塗料１６を吐出するスプレーガン２０を交互に配置した状態で、複数のスプレーガン２０から一斉に塗料１６を吹き付け塗布する。その結果、骨材リッチな塗料の線と骨材プアな塗料の線が交互に隣接して形成され、２種類の塗料線により周期的な凹凸構造が形成される。 Specifically, as shown in FIG. 2A, a plurality of spray guns 20 are arranged in parallel, and the content of the aggregate 17 of the paint discharged from the adjacent spray guns 20 is set so as to have a difference. . For example, in a state where the spray gun 20 that discharges the paint 16 containing the aggregate 17 and the spray gun 20 that discharges the paint 16 that does not contain the aggregate 17 are alternately arranged, the paint 16 is simultaneously applied from the plurality of spray guns 20. Apply by spraying. As a result, aggregate rich paint lines and aggregate poor paint lines are alternately formed adjacent to each other, and a periodic uneven structure is formed by two types of paint lines.
最後に、工程４において、塗料１６の塗布面に対して、トップコートとして機能する塗料１８を一様に塗布する。 Finally, in step 4, the coating material 18 that functions as a top coat is uniformly applied to the coating surface of the coating material 16.
図３は、塗装面の断面を拡大して示す。図３に示すように、複数の骨材１７は、プライマー塗料１４を介して被塗装物１２の表面にしっかりと固定され、数ｍｍ程度の高さで***する。加えて、最外表面をコーティングする塗料１８が骨材１７の剥離を防止する。 FIG. 3 shows an enlarged cross section of the painted surface. As shown in FIG. 3, the plurality of aggregates 17 are firmly fixed to the surface of the article 12 via the primer coating 14 and are raised at a height of about several mm. In addition, the paint 18 that coats the outermost surface prevents the aggregate 17 from peeling off.
（第２実施形態）
以下、図３に基づいて、第２実施形態の塗装方法の各工程を順番に説明する。なお、図３においては、第１実施形態の内容と重複する工程１および工程２の図示を省略する。
(Second Embodiment)
Hereinafter, based on FIG. 3, each process of the coating method of 2nd Embodiment is demonstrated in order. In FIG. 3, illustration of Step 1 and Step 2 that overlap with the contents of the first embodiment is omitted.
工程１において、被塗装物１２を用意し、工程２において、被塗装物１２の被塗装面１２ａに対して、プライマー塗料１４を一様に塗布する。 In step 1, the object to be coated 12 is prepared, and in step 2, the primer paint 14 is uniformly applied to the surface to be coated 12 a of the object to be coated 12.
続く、工程３ａにおいては、被塗装面（プライマー塗料１４を塗布した面）に対して、スプレーガンで骨材１７を含む塗料１６を一様に吹き付け塗布することによって、下地層１６ａを形成する。 In the subsequent step 3a, the base layer 16a is formed by uniformly spraying and applying the paint 16 containing the aggregate 17 to the surface to be coated (the surface to which the primer paint 14 has been applied) with a spray gun.
続く、工程３ｂにおいては、下地層１６ａに対して、スプレーガンで所定の間隔をおいた複数の線を描くように骨材１７を含む塗料１６を吹き付け塗布する。 In the subsequent step 3b, the coating material 16 including the aggregate 17 is sprayed and applied to the base layer 16a so as to draw a plurality of lines with a predetermined interval with a spray gun.
具体的には、図５（ａ）に示すように、複数のスプレーガン２０を並列配置した状態で一斉に骨材１７を含む塗料１６を吹き付け塗布する。なお、本実施形態では、隣接するスプレーガン２０を形成しようとする塗料線の間隔に応じた適切な距離をおいて配置する。その結果、図５（ｂ）に示すように、所定の間隔をおいて形成された複数の塗料線１６ｂが周期的な凹凸構造を形成する。 Specifically, as shown in FIG. 5A, the paint 16 containing the aggregate 17 is sprayed and applied all at once in a state where the plurality of spray guns 20 are arranged in parallel. In the present embodiment, the spray guns 20 that are adjacent to each other are arranged at an appropriate distance according to the interval between the paint lines to be formed. As a result, as shown in FIG. 5B, a plurality of paint lines 16b formed at predetermined intervals form a periodic uneven structure.
最後に、工程４において、塗料１６の塗布面に対して、トップコートとして機能する塗料１８を一様に塗布する。 Finally, in step 4, the coating material 18 that functions as a top coat is uniformly applied to the coating surface of the coating material 16.
なお、本実施形態においては、下地層１６ａの一様性を確保する上で、下地層１６ａを吹き付け塗布する塗料１６に含まれる溶剤の割合を塗料線１６ｂを吹き付け塗布する塗料１６のそれよりも多くすることが好ましい。別の言い方をすれば、凹凸構造を実現する上で、塗料線１６ｂを吹き付け塗布する塗料１６に含まれる溶剤の割合を下地層１６ａを吹き付け塗布する塗料１６のそれよりも少なくすることが好ましい。 In the present embodiment, in order to ensure the uniformity of the base layer 16a, the ratio of the solvent contained in the paint 16 to which the base layer 16a is sprayed and applied is set to be higher than that of the paint 16 to which the paint wire 16b is sprayed and applied. It is preferable to increase it. In other words, in realizing the uneven structure, it is preferable that the ratio of the solvent contained in the paint 16 to which the paint line 16b is applied by spraying is smaller than that of the paint 16 to which the underlayer 16a is applied by spraying.
また、下地層１６ａと塗料線１６ｂは、同じノズル径のスプレーガンを使用して吹き付け塗布することもできるが、高低差の大きい凹凸構造を形成したい場合には、塗料線１６ｂを吹き付け塗布するスプレーガンのノズル径を下地層１６ａを吹き付け塗布するスプレーガンのそれよりも大きくすることが好ましい。 The undercoat layer 16a and the paint wire 16b can be applied by spraying using a spray gun having the same nozzle diameter. However, if it is desired to form a concavo-convex structure having a large difference in elevation, the spray for applying the paint wire 16b by spraying. The nozzle diameter of the gun is preferably larger than that of the spray gun that sprays and coats the underlayer 16a.
以上、第１および第２の実施形態について説明してきたが、本発明においては、上述した複数のスプレーガン２０から一斉に塗料１６を吹き付ける方法に代えて、１つのスプレーガン２０を使用して複数の塗料線を１本ずつ順次的に描く方法を採用してもよい。 As described above, the first and second embodiments have been described. In the present invention, instead of the method of spraying the coating material 16 from the plurality of spray guns 20 described above, a plurality of spray guns 20 are used. You may employ | adopt the method of drawing the paint line of one by one sequentially.
続いて、本発明において使用する骨材について説明する。被塗装物の放熱性を向上させるという目的に鑑みれば、骨材の材料として熱伝導率の良い物質が好ましいことはいうまでもないが、その中でも、ピッチ系の炭素繊維を採用することが望ましい。その理由を以下に述べる。 Next, the aggregate used in the present invention will be described. In view of the purpose of improving the heat dissipation of the object to be coated, it is needless to say that a material having a good thermal conductivity is preferable as an aggregate material. Among them, it is desirable to employ pitch-based carbon fibers. . The reason is described below.
図６（ａ）は、ピッチ系炭素繊維を骨材として使用した塗装面のＳＥＭ画像を示す。骨材としてピッチ系炭素繊維を含む塗料をスプレーガンで吹き付け塗布すると、図６（ａ）に示すように、ピッチ系炭素繊維の長手方向が塗装面に沿って配向する傾向がある。この場合、面方向に分散するピッチ系炭素繊維１７が、図６（ｂ）に矢線で示すように、面方向の熱伝達を促し、その結果、被塗装物１２の放熱性が向上する。 FIG. 6A shows an SEM image of a painted surface using pitch-based carbon fibers as an aggregate. When a paint containing pitch-based carbon fibers as an aggregate is sprayed and applied with a spray gun, the longitudinal direction of the pitch-based carbon fibers tends to be oriented along the painted surface, as shown in FIG. In this case, the pitch-based carbon fibers 17 dispersed in the surface direction promote heat transfer in the surface direction as indicated by arrows in FIG. 6B, and as a result, the heat dissipation of the article 12 to be coated is improved.
なお、用途によっては、被塗装面に対してピッチ系炭素繊維を含む塗料を一様に吹き付け塗布するだけで（塗料線による凹凸構造を形成しなくても）十分な放熱性を確保できる場合がある。その場合は、図７に示す工程で塗装を実施すればよい。すなわち、用意した被塗装物１２の被塗装面１２ａに対して（工程１）、プライマー塗料１４を一様に塗布した後（工程２）、被塗装面（プライマー塗料１４を塗布した面）に対して、スプレーガンでピッチ系炭素繊維１７を含む塗料１６を一様に吹き付け塗布し（工程３）、最後に、塗料１６の塗布面に対して、トップコートとして機能する塗料１８を一様に塗布する（工程４）。 Depending on the application, sufficient heat dissipation may be ensured by simply spraying and applying paint containing pitch-based carbon fibers to the surface to be coated (even without forming an uneven structure with paint lines). is there. In that case, the coating may be performed in the process shown in FIG. That is, after the primer coating 14 is uniformly applied (step 2) to the surface 12a of the prepared object 12 to be coated (step 1), the surface to be coated (the surface to which the primer coating 14 is applied) is applied. Then, the paint 16 containing the pitch-based carbon fibers 17 is sprayed and applied uniformly with a spray gun (step 3), and finally the paint 18 functioning as a top coat is uniformly applied to the application surface of the paint 16. (Step 4).
以上、説明したように、本発明の塗装方法によれば、骨材として混入されるピッチ系炭素繊維がその長手方向を塗装面に沿って面方向に分散するため、面方向の熱伝達が促進され、被塗装物の放熱性が向上する。加えて、塗料線による周期的な凹凸構造を形成することにより、被塗装物の被表面積の増大およびこれに起因して発生する気流渦により熱伝達がさらに促進され、被塗装物の放熱性が格段に向上する。 As described above, according to the coating method of the present invention, the pitch-based carbon fibers mixed as aggregate disperse the longitudinal direction in the surface direction along the painted surface, so that heat transfer in the surface direction is promoted. As a result, the heat dissipation of the object to be coated is improved. In addition, by forming a periodic concavo-convex structure with paint lines, heat transfer is further accelerated by the increase in the surface area of the object to be coated and the airflow vortex generated thereby, and the heat dissipation of the object to be coated is improved. Greatly improved.
なお、説明に使用した各図においては、便宜上、被塗装物の被塗装面を平面として示しているが、本発明の塗装方法は、吹き付け塗布を採用するため複雑な曲面を有している被塗装物に問題なく適用することができる。特に、自動車のヘッドランプ・ハウジングを本発明の方法で塗装すれば、低コストでハウジングの放熱特性を改善することができる。また、上述した本発明の塗装方法は、適切な構成の塗装装置によってオートメーション化することができる。 In the drawings used for the description, the surface to be coated is shown as a plane for convenience. However, the coating method of the present invention employs spray coating, and therefore has a complicated curved surface. It can be applied to painted objects without problems. In particular, if the headlamp housing of an automobile is painted by the method of the present invention, the heat dissipation characteristics of the housing can be improved at low cost. Further, the above-described coating method of the present invention can be automated by a coating apparatus having an appropriate configuration.
以上、本発明について実施形態をもって説明してきたが、本発明は上述した実施形態に限定されるものではない。例えば、上述した実施形態では、プライマー塗料およびトップコートを塗布する態様を例示したが、必要性に応じて、適宜、プライマー塗料およびトップコートの塗布を省略してもよい。その他、当業者が推考しうる実施態様の範囲内において、本発明の作用・効果を奏する限り、本発明の範囲に含まれるものである。 Although the present invention has been described with the embodiment, the present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, the mode in which the primer paint and the top coat are applied has been exemplified. However, the application of the primer paint and the top coat may be omitted as appropriate. In addition, it is included in the scope of the present invention as long as the effects and effects of the present invention are exhibited within the scope of embodiments that can be considered by those skilled in the art.
１２…被塗装物
１４…プライマー塗料
１６…塗料
１７…骨材
１８…塗料
２０…スプレーガン
12 ... Coating object 14 ... Primer paint 16 ... Paint 17 ... Aggregate 18 ... Paint 20 ... Spray gun
Claims (11)
被塗装面に対して骨材としてピッチ系炭素繊維を含む塗料を吹き付け塗布するステップを含むことを特徴とする塗装方法。 A coating method for improving the heat dissipation of the object to be coated,
A coating method comprising a step of spraying and applying a paint containing pitch-based carbon fibers as an aggregate to a surface to be coated.
被塗装面に対して骨材としてピッチ系炭素繊維を含む塗料を複数の線状に吹き付け塗布することによって、該被塗装面に周期的な凹凸構造を形成するステップを含む、請求項１に記載の塗装方法。 The step of spray coating includes
2. The method according to claim 1, further comprising the step of forming a periodic concavo-convex structure on the surface to be coated by spraying and applying a coating containing pitch-based carbon fibers as an aggregate to the surface to be coated. Painting method.
前記被塗装面に対して骨材リッチな塗料の線と骨材プアな塗料の線が交互に隣接するように前記塗料を吹き付け塗布するステップを含む、請求項２に記載の塗装方法。 The step of forming the uneven structure includes
The coating method according to claim 2, further comprising the step of spraying and applying the paint so that an aggregate rich paint line and an aggregate poor paint line are alternately adjacent to the surface to be coated.
前記被塗装面に対して前記塗料を一様に吹き付け塗布することによって下地層を形成するステップと、
前記下地層の上に前記塗料の線が所定の間隔をおくように前記塗料を吹き付け塗布するステップとを含む、請求項２に記載の塗装方法。 The step of forming the uneven structure includes
Forming an underlayer by uniformly spraying and applying the paint to the surface to be coated;
The coating method according to claim 2, further comprising: spraying and applying the paint so that the paint lines are spaced apart from each other on the base layer.
複数のスプレーガンから一斉に前記塗料を吹き付け塗布するステップである、請求項３または４に記載の塗装方法。 The step of spraying and applying to the plurality of lines is as follows:
The coating method according to claim 3 or 4, which is a step of spraying and applying the paint from a plurality of spray guns simultaneously.
被塗装面に対して骨材としてピッチ系炭素繊維を含む塗料を複数の線状に吹き付け塗布することによって、該被塗装面に周期的な凹凸構造を形成する手段を含む、請求項９に記載の塗装装置。 The application means includes
10. A means for forming a periodic uneven structure on the surface to be coated by spraying and applying a paint containing pitch-based carbon fibers as an aggregate to the surface to be coated in a plurality of lines. Painting equipment.
A paint for improving the heat dissipation of an object to be coated, which includes pitch-based carbon fiber as an aggregate.
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| WO2021084796A1 (en) | 2019-10-29 | 2021-05-06 | 京セラ株式会社 | Coating film, automobile, and coating method |
| WO2021084798A1 (en) | 2019-10-29 | 2021-05-06 | 京セラ株式会社 | Coating film, automobile, and coating method |
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