JPH01143669A - Method for coating plastic part - Google Patents
Method for coating plastic partInfo
- Publication number
- JPH01143669A JPH01143669A JP30436487A JP30436487A JPH01143669A JP H01143669 A JPH01143669 A JP H01143669A JP 30436487 A JP30436487 A JP 30436487A JP 30436487 A JP30436487 A JP 30436487A JP H01143669 A JPH01143669 A JP H01143669A
- Authority
- JP
- Japan
- Prior art keywords
- corona discharge
- masking
- masking members
- discharge treatment
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004033 plastic Substances 0.000 title claims abstract description 26
- 229920003023 plastic Polymers 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims description 21
- 238000000576 coating method Methods 0.000 title abstract description 14
- 239000011248 coating agent Substances 0.000 title abstract description 12
- 230000000873 masking effect Effects 0.000 claims abstract description 55
- 238000003851 corona treatment Methods 0.000 claims abstract description 19
- 238000010422 painting Methods 0.000 claims description 23
- 239000003973 paint Substances 0.000 claims description 3
- 238000011109 contamination Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000009832 plasma treatment Methods 0.000 description 6
- 208000028659 discharge Diseases 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000002987 primer (paints) Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000009489 vacuum treatment Methods 0.000 description 1
Landscapes
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Electrostatic Spraying Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はプラスチック部品の塗装方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method for painting plastic parts.
（従来の技術）
プラスチック部品を塗装する場合、プラスチック部品に
対し塗装との密着性を高めるべくプラズマ処理を事前に
施すという技術は知られている。(Prior Art) When painting plastic parts, a technique is known in which the plastic parts are subjected to plasma treatment in advance in order to improve adhesion to the paint.
このプラズマ処理はプラスチック部品の表面を活性化し
て上記密着性向上を図るもので、従来のプライマー塗装
を施す所謂２コー“ト２ベーク処理に代わるものとして
注目を集め、実用化が図られている。また、このプラズ
マ処理の方式としては、減圧下（０，１〜５．０ｔｏｒ
ｒ）でプラスチック部品と真空チャンバとの間に高周波
電圧を印加し、酸素ガスを活性化させて行なう真空処理
法と、大気圧で電極間に高電圧を印加しコロナ放電（気
中放電）を行なう常圧処理法が一般に知られている。This plasma treatment activates the surface of plastic parts to improve the adhesion described above, and is attracting attention as an alternative to the so-called two-coat, two-bake treatment that applies conventional primer coating, and efforts are being made to put it into practical use. In addition, the method of this plasma treatment is under reduced pressure (0.1 to 5.0 torr).
r), a vacuum treatment method in which a high frequency voltage is applied between the plastic part and a vacuum chamber to activate oxygen gas, and a high voltage is applied between electrodes at atmospheric pressure to generate a corona discharge (air discharge). Normal pressure treatment methods are generally known.
ところで、プラスチック部品に部分的な塗装を施す場合
には、非塗装部に対してマスキング処理が施される。こ
のマスキング処理に関し、上記非塗装部にマスキング部
材（テープ）を貼って上述の減圧下でのプラズマ処理を
施し、次に上記マスキング部材を剥離して非塗装部に別
のマスキング部材を取り付け、塗装および焼付の処理を
施すという方法が知られている（例えば、特開昭６０．
−２６１５７４号公報参照）、この方法によれば。By the way, when partially painting a plastic part, a masking process is performed on the unpainted part. Regarding this masking treatment, a masking member (tape) is pasted on the non-painted area and subjected to the plasma treatment under reduced pressure as described above, then the masking member is peeled off, another masking member is attached to the non-painted area, and the coating is applied. There are also known methods of applying a burning process (for example, Japanese Patent Laid-Open No. 1983-1999).
-261574) according to this method.
プラズマ処理用のマスキング部材は、塗装、焼付の影響
を受けないから再使用が可能であるとともに、塗装用の
マスキング部材は耐熱性の高いものの使用により、その
まま焼付工程に供することができる。The masking member for plasma processing is not affected by painting or baking, so it can be reused, and the masking member for painting can be used as is for the baking process by using a material with high heat resistance.
（発明が解決しようとする問題点）
しかしながら、上述のマスキング部材を取り替える方法
では、プラズマ処理時に使用したマスキング部材をプラ
スチック部品から剥がす際や、塗装用マスキング部材を
取り付ける際に、作業者の指等がプラズマ処理部に触れ
てこれを汚損し、塗装不良を招くおそれがあるとともに
、マスキング部材の取替作業も面倒である。(Problems to be Solved by the Invention) However, in the method of replacing the masking member described above, when peeling off the masking member used during plasma treatment from the plastic part or attaching the masking member for painting, the operator's fingers, etc. There is a risk that the masking member may come into contact with the plasma processing section and contaminate it, resulting in poor coating, and the task of replacing the masking member is also troublesome.
（問題点を解決するための手段）
本発明は、上記問題点を解決する手段として、プラスチ
ック部品を部分的に塗装する方法であって、プラスチッ
ク部品にその非塗装部をマスキング部材で被覆して大気
圧でコロナ放電処理を施し、次に上記マスキング部材に
よる被覆状態を保ったまま塗装処理を施すようにしたプ
ラスチック部品の塗装方法を提供するものである。(Means for Solving the Problems) As a means for solving the above problems, the present invention provides a method for partially painting plastic parts, in which the non-painted parts of the plastic parts are covered with a masking member. The object of the present invention is to provide a method for painting plastic parts, in which a corona discharge treatment is performed at atmospheric pressure, and then a painting treatment is performed while maintaining the coating state with the masking member.
（作用）
上記塗装方法においては、マスキング部材はコロナ放電
処理と塗装処理とに共用され、コロナ放電処理から塗装
処理に移行する際に、マスキング部材の取替作業を行な
う必要がない。また、大気圧でのコロナ放電処理により
、プラズマ処理にあたって減圧する必要がないから、マ
スキング部材とプラスチック部品との間に空気が残留し
ていても、この残留空気が減圧の際にマスキング部材の
縁部から抜けてマスキング部材とプラスチック部品との
接着が部分的に剥離するということもない。(Function) In the above coating method, the masking member is used for both the corona discharge treatment and the painting treatment, and there is no need to replace the masking member when transitioning from the corona discharge treatment to the painting treatment. In addition, since corona discharge treatment is performed at atmospheric pressure, there is no need to reduce the pressure during plasma processing, so even if air remains between the masking member and the plastic part, this residual air will be removed from the edge of the masking member when the pressure is reduced. There is no possibility that the adhesive between the masking member and the plastic part will be partially peeled off due to the masking member coming off from the part.
（発明の効果）
従って、本発明によれば、コロナ放電処理の際のマスキ
ング部材をそのまま塗装処理の際のマスキング手段とし
て利用するから、マスキング部材の取替作業によるコロ
ナ放電処理部の汚損の問題がなく、塗装不良を招くこと
を防止することができ、また、大気圧でのコロナ放電処
理により、マスキング部材とプラスチック部品との間の
残留空気によるマスキング部材の剥離の問題がなく、塗
装部と非塗装部との見切りラインが明確になる。(Effects of the Invention) Therefore, according to the present invention, since the masking member used in corona discharge treatment is used as it is as a masking means during painting treatment, there is a problem of contamination of the corona discharge treatment part due to the work of replacing the masking member. In addition, corona discharge treatment at atmospheric pressure eliminates the problem of the masking member peeling off due to residual air between the masking member and the plastic parts, and the painting part The separation line from the non-painted area becomes clear.
（実施例） 以下、本発明の実施例を図面に基いて説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.
本例はプラスチック部品として、第１図に示す自動車用
のバンパー（ポリプロピレン製）１に対し部分的に塗装
を施す場合のものである。すなわち、このバンパー１は
、ランプ取付用の孔が開口したランプ取付部２と、エア
取入用の孔が開口したエア取入部３とを備え、ランプ取
付部２とエア取入部３とを非塗装部とし、他の部分の表
面を塗装すべきものである。In this example, an automobile bumper (made of polypropylene) 1 shown in FIG. 1 is partially painted as a plastic part. That is, this bumper 1 includes a lamp mounting part 2 with a lamp mounting hole and an air intake part 3 with an air intake hole, and the lamp mounting part 2 and the air intake part 3 are separated. This is a painted part, and the surface of other parts should be painted.
上記部分的な塗装を行なうための工程は第２図に示され
ている。すなわち、プラスチック成形されたバンパー１
は、マスキング処理工程４．コロナ放電処理工程５、塗
装処理工程６およびマスキング除去工程７に順に供され
る。The process for performing the above-mentioned partial painting is shown in FIG. That is, a plastic molded bumper 1
Masking process step 4. A corona discharge treatment step 5, a painting treatment step 6, and a masking removal step 7 are performed in this order.
マスキング処理工程４においては、第１図に示すように
、バンパー１のランプ取付部２とエア取入部３に対し、
それぞれバンパー１の表裏両側から表面側マスキング部
材１１．１２と裏面側マスキング部材１３．１４を貼り
付ける。つまり、ランプ取付部２とエア取入部３をマス
キング部材１１〜１４で被覆し、各々の孔を密閉状態と
する（第３図および第４図参照）。このマスキング部材
１１〜１４は、非導電性シート（パラフィン紙）の周縁
部に貼付は用の接着テープを設けたものである。表面側
マスキング部材１１．１２は、バンパー１に対し見切り
用テープ（塩化ビニル樹脂製）による見切り作業を施し
た後、この見切り用テープの上に貼り付ける。In the masking process 4, as shown in FIG.
A front side masking member 11.12 and a back side masking member 13.14 are pasted on both the front and back sides of the bumper 1, respectively. That is, the lamp attachment part 2 and the air intake part 3 are covered with masking members 11 to 14, and each hole is sealed (see FIGS. 3 and 4). The masking members 11 to 14 are each made of a non-conductive sheet (paraffin paper) with an adhesive tape attached to the periphery thereof. The front-side masking members 11 and 12 are pasted on the bumper 1 after a parting tape (made of vinyl chloride resin) is applied to the parting tape.
コロナ放電処理工程５においては、マスキング処理が施
されたバンパー１に対し、大気圧において第４図に示す
装置を用いて放電処理を施す。すなわち、同装置におい
て、１５はバンパー１の裏面側の形状に対応した支持面
を有する（−）側のベース電極であり、バンパー１はこ
のベース電極１５に嵌合状態で支持されるようになって
いる。In corona discharge treatment step 5, the masked bumper 1 is subjected to discharge treatment at atmospheric pressure using the apparatus shown in FIG. 4. That is, in the device, 15 is a (-) side base electrode having a support surface corresponding to the shape of the back side of the bumper 1, and the bumper 1 is supported in a fitted state on this base electrode 15. ing.
１６は上記ベース電極１５の上方に位置し、そのすだれ
状の可撓性電極１７を上記バンパー１の表面の各部にわ
たって接触可能とした（＋）側の逆電極である。この逆
電極１６は、バンパー１の一端から他端へ１点鎖線で示
す軌跡のようにバンパー１の表面形状に倣って移動でき
るように支持装Ｗ（図示省略）に支持されている。また
、上記ベース電極１５と逆電極１６は高周波電圧発生器
１８に接続されている。Reference numeral 16 denotes a (+) side opposite electrode located above the base electrode 15 and capable of contacting the interdigital flexible electrode 17 over various parts of the surface of the bumper 1. This counter electrode 16 is supported by a support W (not shown) so that it can move from one end of the bumper 1 to the other end, following the surface shape of the bumper 1, as shown by a dashed line. Further, the base electrode 15 and the reverse electrode 16 are connected to a high frequency voltage generator 18.
この場合、高周波電圧発生器１８にてベース電極１５と
逆電極１６との間に高周波電圧を印加しながら、逆電極
１６を移動させると、バンパー１のマスキング処理され
ていない表面がコロナ放電により活性化（反応性の高い
官能基の生成）される。In this case, when the reverse electrode 16 is moved while applying a high frequency voltage between the base electrode 15 and the reverse electrode 16 using the high frequency voltage generator 18, the unmasked surface of the bumper 1 becomes activated by corona discharge. (generation of highly reactive functional groups).
塗装処理工程６においては、コロナ放電処理済バンパー
１に対し、第５図に示す如く上記マスキング部材１１〜
１４による被覆状態を保ったまま、塗装ガン１９にて塗
装処理を施す。この塗装処理により、バンパー１は上述
の活性化された表面に密着性の高い塗膜が形成される。In the painting process 6, the corona discharge treated bumper 1 is coated with the masking members 11 to 11 as shown in FIG.
The coating process is performed using a coating gun 19 while maintaining the coating state obtained by 14. Through this coating treatment, a highly adhesive coating film is formed on the above-mentioned activated surface of the bumper 1.
マスキング除去工程７においては、上述のマスキング部
材１１〜１４を剥離するとともに、見切り用テープを剥
離する。In the masking removal step 7, the above-mentioned masking members 11 to 14 are peeled off, and the parting tape is also peeled off.
なお、塗膜の焼付はマスキング除去工程の前あるいは後
に行なうことができる６
従って、上記方法によれば、コロナ放電処理工程５から
塗装処理工程６へ移行する際には、マスキング部材の取
替作業が不要であるため、作業効率が高くなるとともに
、上記取替作業によるコロナ放電処理部の汚損という問
題はない。また、プラズマ処理はコロナ放電処理という
態様で大気圧下で行なわれるため、マスキング処理によ
って貼り付けたマスキング部材１１．１２とバンパー１
との間に空気が残留していても、プラズマ処理時にこの
空気が移動してマスキング部材１１．１２を剥すという
問題はない。よって、塗装不良が防止されるとともに、
見切りラインが狂うこともない。Incidentally, the baking of the paint film can be performed before or after the masking removal step 6 Therefore, according to the above method, when moving from the corona discharge treatment step 5 to the painting treatment step 6, the masking member replacement work is necessary. Since this is not necessary, work efficiency is increased and there is no problem of contamination of the corona discharge treatment section due to the above-mentioned replacement work. In addition, since the plasma treatment is carried out under atmospheric pressure in the form of corona discharge treatment, the masking members 11 and 12 and the bumper 1 pasted by the masking treatment are
Even if air remains between the masking members 11 and 12, there is no problem of this air moving and peeling off the masking members 11, 12 during plasma processing. Therefore, painting defects are prevented, and
The closing line will not go awry.
因に、上記実施例はバンパーの塗装に関するが、本発明
が他のプラスチック部品の塗装にも適用できることはも
ちろんである。Incidentally, although the above embodiment relates to painting a bumper, it goes without saying that the present invention can also be applied to painting other plastic parts.
図面は本発明の実施例を示し、第１図はプラスチック部
品（自動車用バンパー）とマスキング部材を示す斜視図
、第２図は処理工程図、第３図はマスキング処理を施し
たプラスチック部品の斜視図、第４図はコロナ放電処理
の態様を示す断面図、第５図は塗装処理の態様を示す斜
視図である。
１・・・・・・バンパー（プラスチック部品）、２・・
・・・・ランプ取付部（非塗装部）、３・・・・・・エ
ア取入部（非塗装部）、１１，１２，１３．１４・・・
・・・マスキング部材、１５・・・・・・ベース電極、
１６・・・・・・逆電極、１７・・・・・・可撓性電極
、１８・・・・・・高周波電圧発生器、１９・・・・・
・塗装ガン。
４匝１
一！′ｌＩｌ＄Ｉ′ｌ
６心１
０ｖ゛
閏The drawings show embodiments of the present invention; Fig. 1 is a perspective view showing a plastic part (automobile bumper) and a masking member, Fig. 2 is a process diagram, and Fig. 3 is a perspective view of a plastic part subjected to masking treatment. FIG. 4 is a cross-sectional view showing a mode of corona discharge treatment, and FIG. 5 is a perspective view showing a mode of painting treatment. 1... Bumper (plastic parts), 2...
...Lamp mounting part (non-painted part), 3...Air intake part (non-painted part), 11, 12, 13.14...
... Masking member, 15 ... Base electrode,
16... Reverse electrode, 17... Flexible electrode, 18... High frequency voltage generator, 19...
・Painting gun. 4 boxes 1 one! 'lIl$I'l 6 cores 1 0v゛leap
Claims (1)
て、プラスチック部品にその非塗装部をマスキング部材
で被覆して大気圧でコロナ放電処理を施し、次に上記マ
スキング部材による被覆状態を保ったまま塗装処理を施
すことを特徴とするプラスチック部品の塗装方法。(1) A method of partially painting plastic parts, in which the unpainted parts of the plastic parts are covered with a masking member, subjected to corona discharge treatment at atmospheric pressure, and then the covered state with the masking member is maintained. A method for painting plastic parts, characterized by subjecting them to a paint treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30436487A JPH01143669A (en) | 1987-11-30 | 1987-11-30 | Method for coating plastic part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30436487A JPH01143669A (en) | 1987-11-30 | 1987-11-30 | Method for coating plastic part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01143669A true JPH01143669A (en) | 1989-06-06 |
Family
ID=17932131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30436487A Pending JPH01143669A (en) | 1987-11-30 | 1987-11-30 | Method for coating plastic part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01143669A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH081082A (en) * | 1994-06-20 | 1996-01-09 | Kanto Auto Works Ltd | Coating method of resin bumper |
| JP2017177041A (en) * | 2016-03-31 | 2017-10-05 | マツダ株式会社 | Masking method for coating vehicle exterior part |
-
1987
- 1987-11-30 JP JP30436487A patent/JPH01143669A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH081082A (en) * | 1994-06-20 | 1996-01-09 | Kanto Auto Works Ltd | Coating method of resin bumper |
| JP2017177041A (en) * | 2016-03-31 | 2017-10-05 | マツダ株式会社 | Masking method for coating vehicle exterior part |
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