JPH0730186B2 - Hollow body manufacturing method - Google Patents
Hollow body manufacturing methodInfo
- Publication number
- JPH0730186B2 JPH0730186B2 JP63017391A JP1739188A JPH0730186B2 JP H0730186 B2 JPH0730186 B2 JP H0730186B2 JP 63017391 A JP63017391 A JP 63017391A JP 1739188 A JP1739188 A JP 1739188A JP H0730186 B2 JPH0730186 B2 JP H0730186B2
- Authority
- JP
- Japan
- Prior art keywords
- hollow body
- paint
- coating
- resin
- spoiler
- 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.)
- Expired - Lifetime
Links
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、熱可塑性の合成樹脂、特に、機械的強度の大
きい合成樹脂からなる中空体の表面に光沢塗装を施す中
空体の製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for producing a hollow body which is made of a thermoplastic synthetic resin, in particular, a synthetic resin having high mechanical strength, and which has a glossy coating on the surface of the hollow body. .
従来はブロー成形にて成形された中空体を、そのまま塗
装工程にて光沢塗装していた。Conventionally, the hollow body molded by blow molding was directly subjected to gloss coating in the coating process.
ブロー成形により成形される合成樹脂製の中空体、特
に、機械的強度の大きい合成樹脂製の中空体の表面に
は、ブロー成形時にキャビティ面とパリスンとの間に発
生した空気や離型時の擦過傷により0.1〜1mm程度の凹凸
がある。このため、ブロー成形した中空体にそのまま光
沢塗装を施すと、この凹凸が鮮明に表われ、折角光沢塗
装したにもかかわらず外表面が見苦しくなるという欠点
があった。On the surface of a synthetic resin hollow body molded by blow molding, especially on the surface of a synthetic resin hollow body with high mechanical strength, the air generated between the cavity surface and the parison during blow molding There are irregularities of about 0.1 to 1 mm due to scratches. For this reason, when the blow-molded hollow body is directly coated with gloss, the irregularities are clearly visible, and the outer surface becomes unsightly even though the gloss coating is applied.
本発明は上記のことにかんがみなされたもので、中空体
表面のブロー成形による凹凸を隠蔽してきれいな光沢表
面を得ることができる中空体の製造方法を提供すること
を目的とするものである。The present invention has been made in view of the above points, and an object of the present invention is to provide a method for producing a hollow body capable of concealing irregularities formed by blow molding on the surface of the hollow body to obtain a clean glossy surface.
本発明に係る中空体の製造方法は、曲げ弾性率が10,000
kg/cm2以上の機械的強度の大きい合成樹脂にて中空体を
ブロー成形し、この中空体の表面に、粒径が0.1〜10μ
ｍの酸化チタン、カオリンクレー、けい酸カルシウム、
酸化鉄、水酸化アルミニウム、炭酸カルシウム、炭酸マ
グネシウム、タルク、二硫化モリブデンのなかから選択
される顔料を20〜60wt％含有する下塗り塗料を10〜100
μｍの膜厚で塗布し、ついで、塗料当りの空気量を500
〜1500にて上塗り塗料を塗布したことを特徴とするもの
である。The method for manufacturing a hollow body according to the present invention has a bending elastic modulus of 10,000.
Blow molding a hollow body with a synthetic resin with high mechanical strength of kg / cm 2 or more, and a particle size of 0.1 to 10 μm on the surface of this hollow body.
m titanium oxide, kaolin clay, calcium silicate,
Undercoat paint containing 20-60wt% of pigment selected from iron oxide, aluminum hydroxide, calcium carbonate, magnesium carbonate, talc and molybdenum disulfide.
It is applied with a film thickness of μm, then the amount of air per paint is 500
It is characterized in that a top coat paint is applied at ~ 1500.
下塗り塗料の塗布により、ブロー成形による凹凸が隠蔽
され、その後の上塗り塗料の塗布により、凹凸のない光
沢塗装面が得られる。By applying the undercoat paint, the unevenness due to blow molding is hidden, and by applying the overcoat paint thereafter, a glossy coated surface without unevenness can be obtained.
本発明の実施例を図面に基づいて説明する。 An embodiment of the present invention will be described with reference to the drawings.
第３図は本発明方法にて製造しようする部材の一例であ
るスポイラ１を示す。このスポイラ１は乗用車の後部に
風切り用として取付けるものでブロー成形により中空に
形成されている。FIG. 3 shows a spoiler 1 which is an example of a member to be manufactured by the method of the present invention. This spoiler 1 is attached to the rear part of a passenger car for windbreak, and is formed in a hollow shape by blow molding.
上記スポイラ１は第１図、第２図に示すように、押出ダ
イ２より押出し垂下したパリスン３を分割金型4,5にて
挾着し、ついでパリスン３内に圧力流体を吹き込み、両
金型4,5のそれぞれのキャビティ4a,5aに沿う形状、すな
わち、所定のスポイラ形状に成形し、ついで両金型4,5
を型開きすることにより中空成形される。As shown in FIG. 1 and FIG. 2, the spoiler 1 holds the parison 3 extruded from the extrusion die 2 and held by the split dies 4 and 5 and then blows a pressure fluid into the parison 3 so that both the halves are pressed. The molds 4 and 5 are shaped along the respective cavities 4a and 5a, that is, formed into a predetermined spoiler shape, and then both molds 4,5
Hollow molding is performed by opening the mold.
このとき、スポイラ１の縁部の全周のパーティングライ
ン部分にピンチオフによる凹凸が発生するので、この凹
凸を400〜1000番のサンドペーパやバフにて削り取って
平滑に仕上げ、その後全体の表面にトリクロロエチレン
で溶剤処理する。At this time, unevenness due to pinch-off is generated in the parting line part around the entire edge of the spoiler 1, so this unevenness is scraped off with sandpaper or buff No. 400 to 1000 to make it smooth, and then trichloroethylene is applied to the entire surface. Solvent treatment with.
ついでこのスポイラ１の表面に下塗り塗装６を施す。こ
のときの塗料は、顔料として５μｍの粒径の酸化チタン
を33wt％、ウレタンを38wt％、シンナを19wt％、硬化剤
を10wt％含有する塗料を用い、30μｍの膜厚で下塗り塗
布した。Then, an undercoat coating 6 is applied to the surface of the spoiler 1. At this time, the paint used was a paint containing 33 wt% of titanium oxide having a particle size of 5 μm, 38 wt% of urethane, 19 wt% of thinner and 10 wt% of a curing agent as a pigment, and was applied as an undercoat with a film thickness of 30 μm.
その後、上塗り塗装７を施した。この上塗り塗装７は、
アクリル・ウレタン系の塗料当りの空気量（空気使用量
／塗料の噴出量）を500〜1500としてスプレーガンにて
膜厚が30μｍになるように塗装した。After that, top coating 7 was applied. This top coat 7 is
The amount of air per acrylic / urethane-based paint (amount of air used / amount of sprayed paint) was set to 500 to 1500, and coating was performed with a spray gun to a film thickness of 30 μm.
上記工程によりスポイラ１の表面にブロー成形時に生じ
た凹凸８はなくなり、凹凸のないきれいな光沢表面とな
った。Through the above steps, the unevenness 8 generated during blow molding on the surface of the spoiler 1 was eliminated, and a clean glossy surface without unevenness was obtained.
なおこの実施例では上記上塗り塗装７の表面に厚みが20
μｍのクリヤコート塗装９を施した。このクリヤコート
塗装９により中空体の表面の光沢はさらに増すと共に、
塗膜の耐久性が向上された。In this embodiment, the surface of the top coating 7 has a thickness of 20.
A clear coat coating 9 of μm was applied. This clear coat coating 9 further increases the gloss of the surface of the hollow body,
The durability of the coating film was improved.
上記下塗り塗装６の膜厚は一般に10〜100μｍが好まし
い。10μｍ以下では中空体表面の凹凸８を隠蔽できな
い、またこのときの顔料の含有量は20〜60wt％が好まし
く、20wt％以下では隠蔽性が不充分であり、60wt％以上
では中空体表面に対する密着性が低下し剥離することが
ある。Generally, the thickness of the undercoat coating 6 is preferably 10 to 100 μm. When it is 10 μm or less, the irregularities 8 on the surface of the hollow body cannot be hidden, and the content of the pigment at this time is preferably 20 to 60% by weight, and when it is 20% by weight or less, the hiding property is insufficient. May deteriorate and peel off.
また粒径が0.1〜10μｍの顔料とは、酸化チタン、カオ
リンクレー、けい酸カルシウム、酸化鉄、水酸化アルミ
ニウム、炭酸カルシウム、炭酸マグネシウム、タルク、
二硫化モリブデンのなかから選択されるもので、その粒
径が0.1μｍ以下では凹凸の隠蔽効果が充分ではなく、1
0μｍ以上では上塗り塗装面に突出してしまう。The pigment having a particle size of 0.1 to 10 μm means titanium oxide, kaolin clay, calcium silicate, iron oxide, aluminum hydroxide, calcium carbonate, magnesium carbonate, talc,
It is selected from molybdenum disulfide, and if the particle size is 0.1 μm or less, the effect of concealing irregularities is not sufficient.
If it is 0 μm or more, it will protrude onto the top-coated surface.
一方上塗り塗装時における塗料当りの空気量は500以下
では塗装表面が荒れて光沢表面が得られず、1500以上で
は塗料の付着が悪く、生産性が悪くなる。On the other hand, when the amount of air per paint at the time of overcoating is 500 or less, the coated surface is rough and a glossy surface cannot be obtained, and when it is 1500 or more, the adhesion of the paint is poor and productivity is deteriorated.
本発明方法にて製造される中空体の構成材料は、ブロー
成形可能な合成樹脂であって、曲げ弾性率（ASTMD790）
が10,000kg/cm2以上の機械的強度の大きいものである。The constituent material of the hollow body produced by the method of the present invention is a blow-moldable synthetic resin, and the bending elastic modulus (ASTMD790)
Has a high mechanical strength of 10,000 kg / cm 2 or more.
この種の合成樹脂としては、ポリフェニレンエーテル樹
脂、ポリカーボネート樹脂、ポリブチレンテレフタレー
ト樹脂、ポリサルフォン樹脂、ポリエーテルサルフォン
樹脂、ポリエーテルエーテルケトン樹脂、芳香族ポリエ
ステル樹脂、ポリアセタール樹脂、ポリプロピレン樹
脂、ポリエチレンテレフタレート樹脂が該当する。Examples of this kind of synthetic resin include polyphenylene ether resin, polycarbonate resin, polybutylene terephthalate resin, polysulfone resin, polyether sulfone resin, polyether ether ketone resin, aromatic polyester resin, polyacetal resin, polypropylene resin, and polyethylene terephthalate resin. Applicable
上記本発明方法の実施例で示したスポイラ１は、ポリフ
ェニレンエーテル樹脂からなる「ノリル9001」（エンジ
ニアリングプラスチック社製）を用いた。これの曲げ弾
性率は21,000kg/cm2である。As the spoiler 1 shown in the embodiment of the method of the present invention, "Noryl 9001" (manufactured by Engineering Plastics Co., Ltd.) made of polyphenylene ether resin was used. The flexural modulus of this is 21,000 kg / cm 2 .
本発明によれば、曲げ弾性率が10,000kg/cm2以上の機械
的強度の大きい合成樹脂にて中空体をブロー成形し、こ
の中空体の表面に、粒径が0.1〜10μｍの酸化チタン、
カオリンクレー、けい酸カルシウム、酸化鉄、水酸化ア
ルミニウム、炭酸カルシウム、炭酸マグネシウム、タル
ク、二硫化モリブデンのなかから選択される顔料を20〜
60wt％含有する下塗り塗料を10〜100μｍの膜厚で塗布
し、ついで、塗料当りの空気量を500〜1500にて上塗り
塗料を塗布したことにより、ブロー成形により中空体の
表面に生じた0.1〜1mm程度の凹凸を充分に隠蔽すること
ができ、きれいな光沢表面を得ることができ、また、塗
料の中空体表面に対する密着性も極めて良好であった。According to the present invention, a hollow body is blow-molded with a synthetic resin having a bending elastic modulus of 10,000 kg / cm 2 or more and high mechanical strength, and titanium oxide having a particle size of 0.1 to 10 μm is formed on the surface of the hollow body.
20 kinds of pigment selected from kaolin clay, calcium silicate, iron oxide, aluminum hydroxide, calcium carbonate, magnesium carbonate, talc and molybdenum disulfide are used.
An undercoat paint containing 60 wt% was applied to a film thickness of 10 to 100 μm, and then an overcoat paint was applied with an air amount per paint of 500 to 1500. The unevenness of about 1 mm could be sufficiently concealed, a beautiful glossy surface could be obtained, and the adhesion of the coating material to the hollow body surface was also very good.
第１図、第２図はブロー成形工程を示す断面図、第３図
は中空体の一例であるスポイラを示す斜視図、第４図は
塗装前の中空体の拡大断面図、第５図は塗装後の中空体
の拡大断面図である。 １はスポイラ、4,5は分割金型、4a,5aはキャビティ、６
は下塗り塗装、７は上塗り塗装。1 and 2 are sectional views showing a blow molding process, FIG. 3 is a perspective view showing a spoiler as an example of a hollow body, FIG. 4 is an enlarged sectional view of a hollow body before coating, and FIG. It is an expanded sectional view of the hollow body after painting. 1 is a spoiler, 4 and 5 are split molds, 4a and 5a are cavities, 6
Is undercoating and 7 is topcoating.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭56−150465（ＪＰ，Ａ) 特開 昭61−90773（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-150465 (JP, A) JP-A-61-90773 (JP, A)
Claims (1)
度の大きい合成樹脂にて中空体をブロー成形し、この中
空体の表面に、粒径が0.1〜10μｍの酸化チタン、カオ
リンクレー、けい酸カルシウム、酸化鉄、水酸化アルミ
ニウム、炭酸カルシウム、炭酸マグネシウム、タルク、
二硫化モリブデンのなかから選択される顔料を20〜60wt
％含有する下塗り塗料を10〜100μｍの膜厚で塗布し、
ついで、塗料当りの空気量を500〜1500にて上塗り塗料
を塗布したことを特徴とする中空体の製造方法。1. A hollow body is blow-molded with a synthetic resin having a flexural modulus of 10,000 kg / cm 2 or more and high mechanical strength, and titanium oxide or kaolin having a particle size of 0.1 to 10 μm is formed on the surface of the hollow body. Clay, calcium silicate, iron oxide, aluminum hydroxide, calcium carbonate, magnesium carbonate, talc,
20-60wt% pigment selected from molybdenum disulfide
% Of the undercoat paint is applied to a film thickness of 10 to 100 μm,
Then, a method for producing a hollow body, characterized in that an overcoat paint is applied at an air amount per paint of 500 to 1500.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63017391A JPH0730186B2 (en) | 1988-01-29 | 1988-01-29 | Hollow body manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63017391A JPH0730186B2 (en) | 1988-01-29 | 1988-01-29 | Hollow body manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01194977A JPH01194977A (en) | 1989-08-04 |
| JPH0730186B2 true JPH0730186B2 (en) | 1995-04-05 |
Family
ID=11942698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63017391A Expired - Lifetime JPH0730186B2 (en) | 1988-01-29 | 1988-01-29 | Hollow body manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0730186B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS602194B2 (en) * | 1980-04-23 | 1985-01-19 | 一 岡崎 | decorative board |
| JPH0239952B2 (en) * | 1984-10-09 | 1990-09-07 | Koatsu Kako | GOSEIJUSHISEIKEIHINNOSOSHOKUSHIAGEHO |
-
1988
- 1988-01-29 JP JP63017391A patent/JPH0730186B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01194977A (en) | 1989-08-04 |
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