JPH1034042A - Sealing member for preventing embedding of screw hole during powder coating - Google Patents
Sealing member for preventing embedding of screw hole during powder coatingInfo
- Publication number
- JPH1034042A JPH1034042A JP8212170A JP21217096A JPH1034042A JP H1034042 A JPH1034042 A JP H1034042A JP 8212170 A JP8212170 A JP 8212170A JP 21217096 A JP21217096 A JP 21217096A JP H1034042 A JPH1034042 A JP H1034042A
- Authority
- JP
- Japan
- Prior art keywords
- sealing member
- powder coating
- screw hole
- coating
- seal
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
- B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
- B05B12/26—Masking elements, i.e. elements defining uncoated areas on an object to be coated for masking cavities
Landscapes
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、粉体塗装システム
において用いられるシール部材に関する。The present invention relates to a sealing member used in a powder coating system.
【０００２】[0002]
【従来の技術】塗装とは、塗料を薄い膜で素材（被塗
物）の表面をおおうことである。この薄い塗膜が被塗物
の表面を外気から遮断し、汚れや湿気などを防ぎ、素材
に直接傷が付かないように保護したり、腐食や錆止めの
役目をする。また塗装原料に顔料などを混ぜ、外観的に
美しく仕上げる働きももっている。2. Description of the Related Art Painting means covering the surface of a material (substrate) with a thin film of a paint. This thin coating coats the surface of the object to be coated from the outside air, prevents dirt and moisture, protects the material from being directly scratched, and plays a role in preventing corrosion and rust. It also has the function of mixing the raw materials for coating with pigments and the like to make the appearance beautiful.
【０００３】粉体塗装には、熱可塑性や熱硬化性の合成
樹脂粉末塗料すなわち粉体塗料を用いて、塗料の融点よ
りも高い予熱した被塗物面にまぶして融着させる流体浸
漬法や、粉末塗料を帯電させて被塗物面に吸着させてか
ら加熱融着せる粉体静電塗装法などがある。これらの塗
装は自動化が可能なことから、コンベア式の大量塗装に
向いている。また近年、公害規制が厳しくなっているた
めに、溶剤を使用しないハイソリッド塗装法が開発さ
れ、省力化、省資源、環境保全、安全衛生面からも評価
されている。In powder coating, a thermoplastic or thermosetting synthetic resin powder coating or powder coating is used, and a fluid immersion method in which the coating is applied to a preheated surface having a melting point higher than the melting point of the coating by spraying and fusing. In addition, there is a powder electrostatic coating method in which a powder coating is charged, adsorbed on the surface of the object to be coated, and then heated and fused. Because these coatings can be automated, they are suitable for conveyor-type mass coating. In recent years, due to stricter pollution regulations, a high-solid coating method that does not use a solvent has been developed, and has been evaluated in terms of labor saving, resource saving, environmental conservation, and health and safety.
【０００４】図１は、粉体塗装の原理の説明図である。
粉体塗料は図示されていない粉体塗料タンクからスプレ
ーガン１の先端までエア搬送され、高圧発生器２により
高電圧が与えられ、圧縮空気により噴出した粉体塗料は
高電圧の電界中で帯電され、アースされた被塗装物３と
の電位差による電界引力により付着する。静電力によっ
て付着した粉体塗料は、搬送中の振動にも剥離すること
なく、焼付ゾーンまで良好な塗装状態で搬送され、粉体
を加熱融着させて塗膜を形成する。FIG. 1 is an explanatory view of the principle of powder coating.
The powder paint is conveyed by air from a powder paint tank (not shown) to the tip of the spray gun 1, a high voltage is applied by a high-pressure generator 2, and the powder paint ejected by compressed air is charged in a high-voltage electric field. Then, they adhere due to an electric field attraction due to a potential difference from the grounded object 3 to be coated. The powder paint adhered by the electrostatic force is conveyed in a good coating state to the baking zone without peeling even during vibration during conveyance, and heat-fuses the powder to form a coating film.
【０００５】図２は連続的に粉体塗装を行うラインの説
明図である。非塗装物は脱脂槽４、水洗槽５、表面調整
槽６、化成皮膜形成槽７、水洗槽８，９、純水洗槽１
０、水切乾燥炉１１を通過し、前処理工程後に粉体塗装
ブース１２で粉体塗装が行われ、その後、焼付乾燥炉１
４で焼き付けられる。粉体塗装ブースには非塗装物に付
着しなかった塗料を回収する回収装置１３が付属してい
る。FIG. 2 is an explanatory view of a line for continuously performing powder coating. Non-painted objects are degreasing tank 4, washing tank 5, surface conditioning tank 6, chemical conversion film forming tank 7, washing tanks 8 and 9, and pure water washing tank 1.
0, after passing through the draining drying oven 11, after the pretreatment step, the powder coating is performed in the powder coating booth 12, and then the baking drying oven 1
It is baked in 4. The powder coating booth is provided with a collecting device 13 for collecting paint that has not adhered to non-painted objects.
【０００６】図３は水洗槽の断面説明図である。移動す
る非塗装物１５の両側から水が吹き付けられ、下部に溜
まった水は再びポンプ１６で吹き出し口に送られる。FIG. 3 is an explanatory sectional view of a washing tank. Water is sprayed from both sides of the moving non-painted object 15, and the water accumulated in the lower part is sent to the outlet by the pump 16 again.
【０００７】粉体塗装においては、ビス穴があけられて
いるような非塗装物の場合、粉体塗装では複雑な形の細
部にまで塗料が付着し、図４に示すようにビス穴１８な
どの塗装されては困る部分を有する部分にも塗膜１９が
形成されてしまうことがある。[0007] In powder coating, in the case of a non-painted material having screw holes, the paint adheres to the details of complicated shapes in powder coating, and as shown in FIG. In some cases, the coating film 19 may be formed on a portion having a portion that is not desired to be painted.
【０００８】このようなことを防ぐために、塗装前に塗
膜が形成されては困るビス穴に段ボール紙の小片を巻い
たものや、割り箸などをビス穴に差し込んで塗装するこ
とが行われている。このほかに発泡スチロールやシリコ
ンゴムのような弾性部材で作られたシール部材を用いる
こともある。In order to prevent such a situation, a small piece of corrugated cardboard paper is wound around a screw hole where a coating film must not be formed before painting, or a disposable chopstick is inserted into the screw hole for painting. I have. In addition, a sealing member made of an elastic member such as styrene foam or silicone rubber may be used.
【０００９】[0009]
【発明が解決しようとする課題】粉体塗装において、上
記のようにビス穴に埋めるシール部材として用いられ
る、段ボール紙の小片を巻いたものや割り箸は、はずれ
にくかったり、紙片や木材片が塗装面に残りやすいとい
う難点がある。In powder coating, small pieces of corrugated cardboard or disposable chopsticks used as a sealing member to be filled in a screw hole as described above are difficult to come off, or paper or wood pieces are coated. There is a drawback that it tends to remain on the surface.
【００１０】発泡スチロール製のシール部材は焼き付け
時に黒変し、塗装面に影響を与えることがある。シリコ
ンゴム製のシール部材は焼き付け処理にも強いが、比重
が大きく、脱脂、水洗処理などの前処理時に脱落しやす
いこと、また脱落したシール部材が水中に沈んでしま
い、除去しにくい等の難点がある。また、シリコンゴム
は絶縁性が高いことから、電荷が貯まりやすく、帯電し
た塗装粉末を反発するなどするが、これが均一な塗装に
悪影響を及ぼすことがある。本発明の課題は、上記のよ
うな難点を解決するシール部材を開発することである。A styrofoam seal member turns black when baked, which may affect the painted surface. Silicone rubber seal members are resistant to baking, but have a high specific gravity and are likely to fall off during pre-treatment such as degreasing and washing, and the fallen seal members sink in water and are difficult to remove. There is. In addition, since silicon rubber has a high insulating property, electric charges easily accumulate and repel charged coating powder. However, this may adversely affect uniform coating. An object of the present invention is to develop a seal member that solves the above-mentioned difficulties.
【００１１】[0011]
【課題を解決するための手段】上記課題を解決するため
に、本発明ではシール部材をポリメチルペンテンで形成
する。ポリメチルペンテンの軟化点は２００゜Ｃであ
り、融点は２３０゜Ｃであるから、容易にビス穴に合わ
せたシール（ビス穴等の保護材）の成形がしやすい。そ
れでいて、焼付乾燥時の温度２００゜Ｃに対しては軟化
はするものの融け出して被塗物を汚染するようなことは
ない。また比重は１より小さく、水洗い時に万一シール
が落ちても、水に浮くために水の表面に集まり、除去し
やすく、排水口やポンプの吸入口を詰まらせるようなこ
とはない。さらに、絶縁性も適度な値であるため、電荷
が過度に貯まることがない。In order to solve the above-mentioned problems, in the present invention, the sealing member is formed of polymethylpentene. Since the softening point of polymethylpentene is 200 ° C. and the melting point is 230 ° C., it is easy to easily form a seal (a protective material such as a screw hole) in accordance with the screw hole. Nevertheless, at a temperature of 200 ° C. during baking and drying, the material softens but does not melt to contaminate the substrate. Also, the specific gravity is less than 1, so that even if the seal falls down during washing with water, it floats on the water and collects on the surface of the water to be easily removed, and does not clog the drain port or the suction port of the pump. Further, since the insulating property has an appropriate value, the charge is not excessively accumulated.
【００１２】[0012]
【発明の実施の形態】本発明のシール部材の材料となる
ポリメチルペンテンは、４−メチル−１−ペンテンをモ
ノマーとするポリオレフィン系の樹脂の中で、密度の低
さと耐熱性に秀でている。代表的な製造方法は、プロピ
レンをアルカリ金属の存在下で２量化して４−メチル−
１−ペンテンを生成し、精製したモノマーをチーグラー
−ナッタ系触媒の存在下で重合するものである。各種の
コモノマーを添加したコポリマーや無機物を添加して物
性を改良したものもあるが、本発明のシール部材に用い
るメチルペンテンポリマーは、比重が水より小さく、焼
付乾燥時の温度（２００℃）に耐えるものが適当であ
る。BEST MODE FOR CARRYING OUT THE INVENTION Polymethylpentene, which is a material for a sealing member of the present invention, is a polyolefin resin having 4-methyl-1-pentene as a monomer and has excellent low density and excellent heat resistance. I have. A typical production method is to dimerize propylene in the presence of an alkali metal to give 4-methyl-
It produces 1-pentene and polymerizes the purified monomer in the presence of a Ziegler-Natta catalyst. Although there are copolymers to which various comonomers are added and those to which physical properties are improved by adding inorganic substances, the methylpentene polymer used for the seal member of the present invention has a specific gravity smaller than that of water and is lower than the temperature at baking and drying (200 ° C.). Those that withstand are appropriate.
【００１３】図６は本発明のシール部材の材料の一例と
なるポリメチルペンテンの物性を示す図表である。この
ようなポリメチルペンテンを射出成形または押出成形に
より所望の形状に加工してシール部材として用いればよ
い。成形温度は３００℃前後となる。物性として、適度
な弾力性と塗料樹脂との非接着性、耐熱性、特に耐熱老
化性に優れているため、ポリメチルペンテンを材料とす
る本発明のシール部材は、繰り返し再利用することがで
きる。また吸水率の低さや、コストの点から見ても、好
ましい材料である。FIG. 6 is a table showing the physical properties of polymethylpentene, which is an example of the material of the seal member of the present invention. Such a polymethylpentene may be processed into a desired shape by injection molding or extrusion molding and used as a seal member. The molding temperature is around 300 ° C. As the physical properties, it has a moderate elasticity and non-adhesiveness with the coating resin, heat resistance, and is particularly excellent in heat aging resistance, so that the sealing member of the present invention using polymethylpentene can be reused repeatedly. . It is also a preferable material from the viewpoint of low water absorption and cost.
【００１４】本発明のポリメチルペンテン製のシールは
比重が軽いために、もし万一落下したとしても、液体の
上に浮くために、ポンプの目詰まりを防いでいる。ま
た、落下したシールは液体に浮いているために除去が容
易である。しかし現実にはポリメチルペンテン製のシー
ルは弾力性があり、ビス穴に密着しているために、落下
はしにくい。Since the polymethylpentene seal of the present invention has a low specific gravity, if it drops, it floats on the liquid, thereby preventing clogging of the pump. Further, since the dropped seal floats on the liquid, it can be easily removed. However, in reality, the seal made of polymethylpentene has elasticity and is in close contact with the screw hole, so that it is difficult to drop.
【００１５】塗装前処理後、粉体塗装、焼付乾燥とな
り、粉体塗装の一連の処理が終了する。焼付乾燥は２０
０°Ｃで約２０分行われるが、ポリメチルペンテンの融
点２３０°Ｃであるから、軟化はするものの、融けるこ
とはない。焼付乾燥後、ワークをコンベアから取り外
し、次のワークの処理となる。図５に本発明のシール部
材２０，２１の断面形状の例を示す。After the pre-coating process, powder coating and baking and drying are performed, and a series of powder coating processes is completed. Baking and drying is 20
The reaction is carried out at 0 ° C. for about 20 minutes, but since the melting point of polymethylpentene is 230 ° C., it is softened but not melted. After baking and drying, the work is removed from the conveyor and the next work is processed. FIG. 5 shows an example of the cross-sectional shape of the seal members 20 and 21 of the present invention.
【００１６】[0016]
【発明の効果】本発明で用いられているポリメチルペン
テン製シールは、融点が２３０°Ｃと低いために、シー
ルの加工が容易なことである。したがって、さまざまな
形状のシールを容易に加工できる。それでいて、焼付乾
燥時の温度２００°Ｃでは融けることがない。このた
め、シールが融けることによって引き起こされる、塗装
面を汚したり、他の装置に付着して故障を発生させるな
どの、塗装工程に悪影響を及ぼすようなことがない。も
ちろん、ポリメチルペンテン製のシールは焦げたり、燃
えたりすることはないので、安心してシールとして利用
できる。The seal made of polymethylpentene used in the present invention has a low melting point of 230 ° C., so that the seal can be easily processed. Therefore, seals of various shapes can be easily processed. Nevertheless, it does not melt at a temperature of 200 ° C. during baking and drying. For this reason, there is no adverse effect on the painting process, such as fouling of the painted surface caused by melting of the seal or adhesion to other devices to cause a failure. Of course, the seal made of polymethylpentene does not burn or burn, so it can be used as a seal with confidence.
【００１７】ポリメチルペンテンの軟化点は２００°Ｃ
であるが、焼付乾燥で形状変形することはない。したが
って、本発明のシールは何度も再利用が可能である。さ
らに、比重が小さいために水に浮き、取り扱いが楽であ
る。たとえば万一、シャワールームでシールが落ちても
水に浮くために、ポンプを詰まらせるようなことはな
く、しかも容易に落下シールを除去することができる。The softening point of polymethylpentene is 200 ° C.
However, the shape is not changed by baking and drying. Thus, the seal of the present invention can be reused many times. Furthermore, since it has a low specific gravity, it floats on water and is easy to handle. For example, even if the seal falls in the shower room, the seal floats on the water, so that the pump is not clogged, and the falling seal can be easily removed.
【００１８】本発明のポリメチルペンテン製のシールは
耐熱性があって、しかも弾力に富んでいることから、ビ
ス穴用のシールとしては最適である。また、適当な電気
的特性を有するので粉体塗装に悪影響を及ぼすことが少
ないなどの優れた効果がある。Since the polymethylpentene seal of the present invention has heat resistance and high elasticity, it is most suitable as a seal for screw holes. In addition, since it has appropriate electric characteristics, it has excellent effects such as little adverse effect on powder coating.
【図１】粉体塗装の原理の説明図である。FIG. 1 is an explanatory view of the principle of powder coating.
【図２】連続的に粉体塗装を行うラインの説明図であ
る。FIG. 2 is an explanatory diagram of a line for continuously performing powder coating.
【図３】水洗槽の断面説明図である。FIG. 3 is an explanatory sectional view of a washing tank.
【図４】ビス穴を有する非塗装物への塗装の説明図であ
る。FIG. 4 is an explanatory view of coating a non-painted object having screw holes.
【図５】本発明のシール部材の一例の断面図である。FIG. 5 is a sectional view of an example of the seal member of the present invention.
【図６】本発明のシール部材の材料の一例となるポリメ
チルペンテンの物性を示す図表である。FIG. 6 is a table showing physical properties of polymethylpentene, which is an example of a material for a seal member of the present invention.
１ スプレーガン ２ 高圧発生器 ３ 被塗装物 ４ 脱脂槽 ５ 水洗槽 ６ 表面調整槽 ７ 化成皮膜形成槽 ８ 水洗槽 ９ 水洗槽 １０ 純水洗槽 １１ 水切乾燥炉 １２ 粉体塗装ブース １３ 回収装置 １４ 焼付乾燥炉 １５ 非塗装物 １６ ポンプ １７ 非塗装物 １８ ビス穴 １９ 塗膜 ２０ シール部材 ２１ シール部材 DESCRIPTION OF SYMBOLS 1 Spray gun 2 High-pressure generator 3 Object to be coated 4 Degreasing tank 5 Rinse tank 6 Surface adjustment tank 7 Chemical conversion film formation tank 8 Rinse tank 9 Rinse tank 10 Pure water tank 11 Drain drying oven 12 Powder coating booth 13 Recovery device 14 Baking Drying oven 15 Non-painted material 16 Pump 17 Non-painted material 18 Screw hole 19 Coating film 20 Seal member 21 Seal member
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鹿川 幸助 東京都目黒区南１−19−11 (72)発明者 小林 冨士夫 神奈川県横浜市旭区都岡町86−９ ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kosuke Kagawa 1-19-11 Minami, Meguro-ku, Tokyo (72) Inventor Fujio Kobayashi 86-9 Tsukaokacho, Asahi-ku, Yokohama-shi, Kanagawa
Claims (1)
特徴とする粉体塗装用穴埋めシール部材。1. A filling member for filling powder coating, which is made of polymethylpentene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8212170A JPH1034042A (en) | 1996-07-24 | 1996-07-24 | Sealing member for preventing embedding of screw hole during powder coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8212170A JPH1034042A (en) | 1996-07-24 | 1996-07-24 | Sealing member for preventing embedding of screw hole during powder coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1034042A true JPH1034042A (en) | 1998-02-10 |
Family
ID=16618073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8212170A Pending JPH1034042A (en) | 1996-07-24 | 1996-07-24 | Sealing member for preventing embedding of screw hole during powder coating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1034042A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005071480A1 (en) * | 2004-01-27 | 2005-08-04 | Bridgestone Corporation | White particle for display medium and information display utilizing the same |
-
1996
- 1996-07-24 JP JP8212170A patent/JPH1034042A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005071480A1 (en) * | 2004-01-27 | 2005-08-04 | Bridgestone Corporation | White particle for display medium and information display utilizing the same |
| JPWO2005071480A1 (en) * | 2004-01-27 | 2007-09-06 | 株式会社ブリヂストン | White particles for display medium and information display device using the same |
| US7639417B2 (en) | 2004-01-27 | 2009-12-29 | Bridgestone Corporation | White color particles for display media and information display device utilizing them |
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