JP3792014B2

JP3792014B2 - Liquid resin coating method, coating apparatus and molded product manufactured by the method

Info

Publication number: JP3792014B2
Application number: JP22397297A
Authority: JP
Inventors: 明夫佐藤
Original assignee: Ricoh Co Ltd
Current assignee: Ricoh Co Ltd
Priority date: 1997-08-20
Filing date: 1997-08-20
Publication date: 2006-06-28
Anticipated expiration: 2017-08-20
Also published as: JPH1157593A

Description

【０００１】
【発明の属する技術分野】
本発明は、反応することにより硬化する液状樹脂の塗布方法の改良、その改良した塗布方法の実施に用いる塗布装置及びその方法により製造された成形品に関する。
【０００２】
【従来の技術】
従来から、反応することにより硬化する液状樹脂を被塗布体に塗布して、この液状樹脂を硬化させて塗布体を形成する方法が知られている。
【０００３】
この種の塗布方法としては、たとえば図４に示すように、混合されると反応して硬化する二種以上の液状樹脂を各々給送管１ａ，１ｂによって超音波伝送用固体ホーン１の側肌面２に供給し、各液状樹脂に超音波振動が与えられて側肌面２を伝わりながら混合されるように各液状樹脂を流下させ、かつ、超音波伝送用固体ホーン１を被塗布体４上に設けられたループ状溝５に沿って一定方向に移送しながらその空中状態で混合された混合液状樹脂６をループ状溝５に滴下させ、ループ状溝５に沿って塗布体７を形成する方法がある。
【０００４】
【発明が解決しようとする課題】
ところで、この塗布方法では、ループ状溝５の所定箇所８を塗布開始点９として混合液状樹脂６の塗布を開始し、超音波伝送用固体ホーン１をループ状溝５に沿わせてＡ方向に移動させ、所定箇所８に戻ってきたところを塗布終了点１０として塗布を終了することによって、塗布開始点９と塗布終了点１０とをつながらせて塗布体７をループ状に形成している。
【０００５】
しかしながら、ループ状溝５に沿って塗布開始点９から塗布終了点１０まで塗布するにはかなりの時間を要するため、この時間内に塗布開始点９における混合液状樹脂６に皮膜が形成される場合や、その時間内に塗布終了点１０における混合液状樹脂６が塗布開始点９における混合液状樹脂６と馴染みにくくなる場合には、塗布開始点９と塗布終了点１０との接合部に境界面が生じ、塗布開始点９側の混合液状樹脂６と塗布終了点１０側の混合液状樹脂６との相互融合が進行しにくいため、塗布開始点９と塗布終了点１０との間に隙間１２ができることがある。この隙間１２は塗布体７にシール効果を持たせようとした場合に問題となる。
【０００６】
また、塗布開始点９側の混合液状樹脂６と塗布終了点１０側の混合液状樹脂６との相互融合がスムーズに行われないと、塗布開始点９と塗布終了点１０との接合部にはまわりと較べて硬度的に特異点が生じるおそれがあり、被塗布体４に蓋体１３をかぶせて内部をシールするような製品の場合には、蓋体１３を塗布体７に圧接する際に蓋体１３に不均一な弾接力が加わることになる。蓋体１３が軟らかい材料の場合には、その不均一な弾接力に基づいて不均一に歪むため、どこかに隙間が生じるおそれが高い。
【０００７】
そこで、この発明は、反応することにより硬化する液状樹脂を被塗布体に塗布してループ状の塗布体を形成する際に、互いに連結されるべき樹脂端同士に境界面が生じるのを避けることができる塗布方法と、その塗布方法に用いる塗布装置と、その塗布方法により製造された成形品とを提供することを目的とする。
【０００８】
【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の請求項１に記載の液状樹脂の塗布方法は、反応することにより硬化する液状樹脂を被塗布体に塗布してループ状の塗布体を形成するために、塗布をループ仮想線に沿って複数に分割して塗布進行方向を順次逆転させて行う液状樹脂の塗布方法であって、各塗布に基づく液状樹脂の端部が相互に融合するように、第１回目の液状樹脂の塗布開始点側を第２回目の液状樹脂の塗布開始点として第１回目の塗布進行方向と逆方向に第２回目の塗布を行い、第３回目以降の液状樹脂の塗布については、符号ｎを３以上の自然数として、第ｎ回目の液状樹脂の塗布開始点を第ｎ−２回目の液状樹脂の塗布終了点側として第ｎ−１回目の塗布進行方向と逆方向に第ｎ回目の塗布が順次行われて塗布体のループを完成させることを特徴としている。
【０００９】
請求項２に記載の液状樹脂の塗布方法は、請求項１に記載の液状樹脂の塗布方法において、混合により反応する二種以上の前記液状樹脂が、下部に結合軸を介して設けられた混合液流下ガイドを有する超音波伝送用固体ホーンの加振によって該超音波伝送用固体ホーンおよび前記混合液流下ガイドの間で液溜まりとして保持されて混合され、該超音波伝送用固体ホーンの加振振幅の減少によって前記液状樹脂が滴下されて塗布されることを特徴としている。
【００１０】
請求項３に記載の液状樹脂の塗布方法は、請求項１又は請求項２に記載の液状樹脂の塗布方法において、前記第１回目の液状樹脂の塗布開始点と前記第２回目の液状樹脂の塗布開始点との間及び前記第ｎ−２回目の液状樹脂の塗布終了点と前記第ｎ回目の液状樹脂の塗布開始点との間に各々間隙を開けて塗布を行うことを特徴としている。
【００１２】
請求項４に記載の液状樹脂の塗布装置は、反応することにより硬化する液状樹脂を被塗布体に塗布してループ状の塗布体を形成するために、塗布をループ仮想線に沿って複数に分割して塗布進行方向を順次逆転させて行う液状樹脂の塗布装置であって、第１回目の液状樹脂の塗布開始点側を第２回目の液状樹脂の塗布開始点として第１回目の塗布方向と逆方向に第２回目の塗布を行い、第３回目以降の液状樹脂の塗布については、符号ｎを３以上の自然数として、第ｎ回目の液状樹脂の塗布開始点を第ｎ−２回目の液状樹脂の塗布終了点側として第ｎ−１回目の塗布方向と逆方向に第ｎ回目の塗布を行うことを特徴としている。
【００１３】
請求項５に記載の塗布成形品の製造方法は、反応することにより硬化する液状樹脂の塗布をループ仮想線に沿って複数に分割して塗布進行方向を順次逆転させて行うことによってループ状の塗布体が形成される塗布成形品の製造方法であって、第１回目の液状樹脂の塗布開始点側を第２回目の液状樹脂の塗布開始点としてかつ前記第１回目の液状樹脂の塗布開始点と前記第２回目の液状樹脂の塗布開始点との間に間隙を開けて第１回目の塗布進行方向と逆方向に第２回目の塗布を行い、第３回目以降の液状樹脂の塗布については、符号ｎを３以上の自然数として、第ｎ回目の液状樹脂の塗布開始点を第ｎ−２回目の液状樹脂の塗布終了点側としてかつ前記第ｎ−２回目の液状樹脂の塗布終了点と前記第ｎ回目の液状樹脂の塗布開始点との間に間隙を開けて第ｎ−１回目の塗布進行方向と逆方向に第ｎ回目の塗布を行うことによって、前記ループ状の塗布体が設けられることを特徴としている。
【００１４】
【発明の実施の形態】
本発明の実施の形態を図面に従って説明する。ここでは、反応することにより硬化する液状樹脂としてイソシアネートとポリオールとを用い、これらを混合して反応させることにより塗布体を形成する。
【００１５】
図１は本発明の塗布方法に用いる塗布装置の模式図で、１４は統括制御装置、１５は高周波電源装置、１６は振動子、１７は超音波伝送用固体ホーン、１８は温度調整装置、１９は温水、２０はイソシアネート２１を貯留する容器、２２はポリオール２３を貯留する容器、２４，２５はイソシアネート２１、ポリオール２３をそれぞれ撹拌するためのモータ、２６は給送管に液状樹脂２１，２３を給送する給送制御装置、２７，２８はイソシアネート２１、ポリオール２３の各給送管、２９は移動制御装置、３０はＸ方向移動機構、３１はＹ方向移動機構、３２，３３は笠歯車、３４は駆動モータ、３５は被塗布体としての成形品である。
【００１６】
高周波電源装置１５は振動子１６を駆動し、給送制御装置２６はマイクロギヤポンプを備えて液状樹脂２１，２３の吐出比率調整を行い、移動制御装置２９はＸ−Ｙ移動機構３０，３１を駆動制御する役割、超音波伝送用固体ホーン１７を上下方向に駆動制御する役割、笠歯車３２，３３を駆動制御して給送管２７，２８に対する成形品３５の周回り方向位置を定める役割を果たす。
【００１７】
温度調整装置１８により所定温度に保たれたイソシアネート２１、ポリオール２３は、給送制御装置２６によってそれぞれ給送管２７，２８に導かれる。給送管２７，２８の各樹脂流出口は超音波伝送用固体ホーン１７の側肌面３６に臨まされ、液状樹脂２１，２３が側肌面３６に給送されるようになっている。
【００１８】
その超音波伝送用固体ホーン１７は振動子１６の機械端子に取り付けられ、振動子１６により加振される。超音波伝送用固体ホーン１７の下部には図２に拡大して示すように円柱状をなした結合軸３７が設けられ、その結合軸３７の先端部には混合液流下ガイド３８が設けられている。
【００１９】
側肌面３６に液状樹脂２１，２３が供給されると、超音波伝送用固体ホーン１７が加振されていないときには液状樹脂２１，２３は重力よってそのまま流下するが、超音波伝送用固体ホーン１７が加振されているときは、図３に示すように液状樹脂２１，２３は混合液流下ガイド３８によって略球形の液溜まり３９を形成して保持される。混合液流下ガイド３８は結合軸３７を介して超音波伝送用固体ホーン１７に結合されているので、超音波伝送用固体ホーン１７の超音波振動に共振して超音波振動し、液溜まり３９には超音波伝送用固体ホーン１７の振動面４０と混合液流下ガイド３８の反射面４１とから超音波振動が与えられ、イソシアネート２１とポリオール２３との混合が行われる。この混合された液状樹脂４２は、超音波伝送用固体ホーン１７の加振振幅の減少に伴い液溜まり３９として保持される量が減少するので、その加振振幅の減少によって成形品３５のループ仮想線としてのループ状溝４３に滴下される。
【００２０】
以下、この液状樹脂４２の塗布を図３（ａ），（ｂ）を用いつつ説明する。図中▲１▼，▲２▼，…は超音波伝送用固体ホーン１７の移動順序を示しているが、この超音波伝送用固体ホーン１７の移動は成形品３５に対する相対的な移動であって、Ｘ−Ｙ移動機構３０，３１により成形品３５を移動させることによって行われる。
【００２１】
以下において超音波伝送用固体ホーン１７の位置決め・移動を説明する際には、その成形品３５に対する超音波伝送用固体ホーン１７の相対的な位置決め・移動をいうものとする。
【００２２】
この塗布装置において液状樹脂４２は、ループ状溝４３に沿っての進行方向を順次逆方向にトレースするようにして、所定長ずつ繰り返して成形品３５のループ状溝４３に塗布される。
【００２３】
すなわち、第１回目の塗布は、ループ状溝４３の所定箇所が塗布開始点４４となるように超音波伝送用固体ホーン１７を位置決めすると共に、超音波伝送用固体ホーン１７を加振して液状樹脂２１，２３を供給・混合し液溜まり３９をつくって開始する。超音波伝送用固体ホーン１７を▲１▼に示すようにループ状溝４３に沿って移動させながら、超音波伝送用固体ホーン１７の加振振幅を減少させて余剰の液状樹脂４２を滴下することによって所定長の塗布を行う。この塗布は塗布終了点４５で終了する。
【００２４】
第１回目の塗布終了後、第２回目の塗布は超音波伝送用固体ホーン１７を▲２▼に示すように移動させてこれを第１回目の塗布開始点４４側に位置決めすると共に、超音波伝送用固体ホーン１７の加振振幅を再度増大させ液状樹脂２１，２３を供給・混合し液溜まり３９の大きさを第１回目の塗布開始前とほぼ等しくして開始する。この第２回目の塗布は、第１回目の塗布開始点４４の液状樹脂４２に皮膜が形成される以前又は第１回目の塗布開始点４４の液状樹脂４２が新たに塗布される液状樹脂４２と馴染みにくくなる以前に開始し、▲３▼に示すように第１回目の塗布方向とループ状溝４３に沿って逆方向に行う。また、第２回目の塗布開始点と第１回目の塗布開始点４４との間に適当な間隙を開けることによって、塗布した液状樹脂４２がその間隙に流れ込んで第１回目の塗布による樹脂端と第２回目の塗布による樹脂端とが融合するようにしている。
【００２５】
同様に、第２回目の塗布終了後、第３回目の塗布は、超音波伝送用固体ホーン１７を▲４▼に示すように移動させてこれを第１回目の塗布終了点４５側に位置決めすると共に、超音波伝送用固体ホーン１７の加振振幅を再度増大させ液状樹脂２１，２３を供給・混合し液溜まり３９の大きさを第１回目の塗布開始前とほぼ等しくして開始する。この第３回目の塗布は、第１回目の塗布終了点４５の液状樹脂４２に皮膜が形成される以前又は第１回目の塗布終了点４５の液状樹脂４２が新たに塗布される液状樹脂４２と馴染みにくくなる以前に開始し、▲５▼に示すように第２回目の塗布方向とループ状溝４３に沿って逆方向に行う。また、第３回目の塗布開始点と第１回目の塗布終了点４５との間に適当な間隙を開けることによって、塗布した液状樹脂４２がその間隙に流れ込んで第１回目の塗布による樹脂端と第３回目の塗布による樹脂端とが融合するようにしている。
【００２６】
第３回目以降の第ｎ回目の塗布は、その塗布開始点を第ｎ−２回目の塗布終了点側として第ｎ−１回目の塗布方向とループ状溝４３に沿って逆方向に行い、その他の手順等に関しては上記第３回目の塗布と同様である。
【００２７】
この塗布を繰り返すことによって均質な塗布体が順次形成されていき、たとえば図３（ｂ）においては、超音波伝送用固体ホーン１７を１５回移動してｎ＝８の塗布で塗布体のループが完成し、塗布成形品が製造される様子を表しているが、その塗布体のループを完成させる最後の塗布についてはその塗布の長さが前記所定長では長過ぎることがあるので、このような場合には液状樹脂４２の滴下量を調整し、その塗布終了点の液状樹脂４２と前々回の塗布終了点の液状樹脂４２とが適当に融合するようにする必要がある。
【００２８】
以上、発明の実施の形態を図面を用いて説明したが、この発明の実施の態様は既述したものには限られない。たとえば、図１に示す塗布装置は塗布に際して被塗布体を移動させる構成であるが、超音波伝送用固体ホーンが被塗布体に対して相対的に移動可能ならばどのような構成でもよい。また、その塗布装置では液状樹脂を被塗布体に塗布するために超音波伝送用固体ホーンを用いたが、液状樹脂の吐出・停止を制御できるものならば代替の可能性がある。
【００２９】
【発明の効果】
本発明は、以上説明したような方法及び構成としたので、反応することにより硬化する液状樹脂を被塗布体に塗布してループ状の塗布体を形成する際に、互いに連結されるべき樹脂端同士に境界面が生じるのを避けることができるという効果を奏する。
【図面の簡単な説明】
【図１】発明の実施の形態に係る塗布装置を示す説明図である。
【図２】超音波伝送用固体ホーンの下部先端付近の拡大図であって、（ａ）は超音波伝送用固体ホーンの下部先端付近を斜め上方から見た図であり、（ｂ）は超音波伝送用固体ホーンの下部先端付近を斜め下方から見た図である。
【図３】発明の実施の形態に係る塗布方法の説明図であって、（ａ）は超音波伝送用固体ホーンの被塗布体に対する相対的な位置関係を模式的に示す図であり、（ｂ）は（ａ）の超音波伝送用固体ホーンの移動順序を例示する図である。
【図４】従来の液状樹脂をループ状に塗布する方法の説明図であって、（ａ）は塗布開始点と塗布終了点とがつながった付近を示す側面図であり、（ｂ）は超音波伝送用固体ホーンの被塗布体に対する相対的な位置関係を模式的に示す図である。
【符号の説明】
３５…成形品（被塗布体）
４２…液状樹脂
４３…ループ状溝（ループ仮想線）
４４…塗布開始点[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a coating method of a liquid resin that is cured by reaction, a coating apparatus used for carrying out the improved coating method, and a molded article manufactured by the method.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a method is known in which a liquid resin that is cured by reaction is applied to an object to be coated, and the liquid resin is cured to form an applied body.
[0003]
As this type of coating method, for example, as shown in FIG. 4, two or more kinds of liquid resins that react and harden when mixed are fed to the side skin of the solid horn 1 for ultrasonic transmission by means of feed pipes 1a and 1b, respectively. The liquid resin is supplied to the surface 2, and each liquid resin is caused to flow while being ultrasonically applied to each liquid resin so as to be mixed while being transmitted along the side skin surface 2, and the ultrasonic transmission solid horn 1 is applied to the coated body 4. The mixed liquid resin 6 mixed in the air is dropped onto the loop-shaped groove 5 while being transferred in a certain direction along the loop-shaped groove 5 provided on the upper surface, and an application body 7 is formed along the loop-shaped groove 5. There is a way to do it.
[0004]
[Problems to be solved by the invention]
By the way, in this application method, the application of the mixed liquid resin 6 is started with the predetermined portion 8 of the loop groove 5 as the application start point 9, and the ultrasonic transmission solid horn 1 is moved along the loop groove 5 in the A direction. The application body 7 is formed in a loop by connecting the application start point 9 and the application end point 10 by ending the application with the application end point 10 being moved and returning to the predetermined location 8.
[0005]
However, since a considerable amount of time is required for coating from the coating start point 9 to the coating end point 10 along the loop-shaped groove 5, a film is formed on the mixed liquid resin 6 at the coating start point 9 within this time. If the mixed liquid resin 6 at the application end point 10 becomes difficult to become familiar with the mixed liquid resin 6 at the application start point 9 within that time, a boundary surface is formed at the joint between the application start point 9 and the application end point 10. As a result, it is difficult for the mixed liquid resin 6 on the application start point 9 side and the mixed liquid resin 6 on the application end point 10 side to proceed with each other, so that a gap 12 is formed between the application start point 9 and the application end point 10. There is. This gap 12 becomes a problem when the application body 7 is to have a sealing effect.
[0006]
Also, if the mixed liquid resin 6 on the application start point 9 side and the mixed liquid resin 6 on the application end point 10 side are not smoothly fused, the joint between the application start point 9 and the application end point 10 There is a possibility that a singular point may occur in hardness compared with the surroundings. In the case of a product in which the cover body 13 is covered with the lid body 13 and the inside is sealed, the lid body 13 is pressed against the coating body 7. Uneven elastic contact force is applied to the lid 13. When the lid 13 is made of a soft material, the lid 13 is distorted non-uniformly based on the non-uniform elastic contact force.
[0007]
Therefore, the present invention avoids the occurrence of a boundary surface between resin ends to be connected to each other when a liquid resin that is cured by reaction is applied to an object to form a loop-shaped application body. It is an object of the present invention to provide a coating method, a coating apparatus used for the coating method, and a molded product manufactured by the coating method.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the liquid resin coating method according to claim 1 of the present invention is to apply a liquid resin that is cured by reaction to a coated body to form a loop-shaped coated body. A liquid resin coating method in which coating is performed by dividing the coating into a plurality along a loop imaginary line and sequentially reversing the coating traveling direction. The first method is such that the ends of the liquid resin based on each coating are fused together . With respect to the application of the liquid resin for the third and subsequent times, the second application is performed in the direction opposite to the direction of the first application with the application start point of the second liquid resin as the start of the application of the second liquid resin. The sign n is a natural number of 3 or more, and the n-th liquid resin application start point is the n-2nd liquid resin application end point side in the direction opposite to the (n-1) th application progress direction. n-th application is performed sequentially to complete the loop of the application body It is characterized in that.
[0009]
The liquid resin coating method according to claim 2 is the liquid resin coating method according to claim 1, wherein two or more types of the liquid resins that react by mixing are provided at a lower portion through a coupling shaft. The ultrasonic transmission solid horn having a liquid flow guide is held and mixed as a liquid pool between the ultrasonic transmission solid horn and the mixed liquid flow guide by the vibration, and the ultrasonic transmission solid horn is vibrated. The liquid resin is dropped and applied by reducing the amplitude .
[0010]
The liquid resin application method according to claim 3 is the liquid resin application method according to claim 1 or 2, wherein the first liquid resin application start point and the second liquid resin application method are the same. The coating is performed with a gap between the coating start point and between the (n-2) th liquid resin coating end point and the nth liquid resin coating start point .
[0012]
The apparatus for applying a liquid resin according to claim 4 , in order to form a loop-shaped application body by applying a liquid resin that is cured by reaction to the object to be coated, a plurality of applications are performed along the loop imaginary line. A liquid resin coating apparatus that performs division and sequentially reverses the coating progress direction, and the first liquid resin coating start point is defined as the first liquid resin coating start point side. The second application is performed in the opposite direction, and the application of the liquid resin for the third and subsequent times is made a natural number of 3 or more, and the application start point of the nth liquid resin is the n-2nd application It is characterized in that the nth application is performed in the direction opposite to the (n-1) th application direction on the liquid resin application end point side.
[0013]
Method for producing a coated molded article according to claim 5, looped by intends sequentially reversed so by rows coating advancing direction is divided into a plurality along a coating of liquid resin which cures to a loop virtual line by reacting the applicator body is a method for producing a Ru formed coated moldings, coating of the first liquid coating starting point side of the resin and the first time as the coating starting point of the second liquid resin liquid resin A second application is performed in a direction opposite to the first application progress direction with a gap between the start point and the second application start point of the liquid resin, and the third and subsequent application of the liquid resin is performed. , The symbol n is a natural number of 3 or more, the application start point of the nth liquid resin is set to the application end point side of the (n-2) th liquid resin, and the application of the (n-2) th liquid resin is ended. Between the point and the application start point of the nth liquid resin By performing the n-th applied to the (n-1) th coating direction opposite to the traveling direction to open the gap, the loop-shaped coating member is characterized in that Ru is provided.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. Here, an application body is formed by using isocyanate and polyol as a liquid resin that is cured by reaction, and mixing and reacting them.
[0015]
FIG. 1 is a schematic diagram of a coating apparatus used in the coating method of the present invention, wherein 14 is an overall control device, 15 is a high frequency power supply device, 16 is a vibrator, 17 is a solid horn for ultrasonic transmission, 18 is a temperature adjustment device, 19 Is a container for storing the isocyanate 21, 22 is a container for storing the polyol 23, 24 and 25 are motors for stirring the isocyanate 21 and the polyol 23, and 26 is a liquid resin 21 and 23 for the feeding pipe. Feed control device for feeding, 27 and 28 are feed pipes of isocyanate 21 and polyol 23, 29 is a movement control device, 30 is an X direction moving mechanism, 31 is a Y direction moving mechanism, 32 and 33 are bevel gears, Reference numeral 34 denotes a drive motor, and 35 denotes a molded product as an object to be coated.
[0016]
The high frequency power supply device 15 drives the vibrator 16, the feed control device 26 includes a micro gear pump and adjusts the discharge ratio of the liquid resins 21 and 23, and the movement control device 29 drives the XY movement mechanisms 30 and 31. A role to control, a role to drive and control the ultrasonic transmission solid horn 17 in the vertical direction, and a role to drive and control the bevel gears 32 and 33 to determine the circumferential direction position of the molded product 35 with respect to the feeding pipes 27 and 28. .
[0017]
The isocyanate 21 and polyol 23 maintained at a predetermined temperature by the temperature adjusting device 18 are guided to the feed pipes 27 and 28 by the feed control device 26, respectively. The resin outlets of the feeding pipes 27 and 28 face the side skin surface 36 of the ultrasonic transmission solid horn 17 so that the liquid resins 21 and 23 are fed to the side skin surface 36.
[0018]
The ultrasonic transmission solid horn 17 is attached to the mechanical terminal of the vibrator 16 and is vibrated by the vibrator 16. As shown in an enlarged view in FIG. 2, a cylindrical coupling shaft 37 is provided at the lower part of the ultrasonic transmission solid horn 17, and a mixed liquid flow guide 38 is provided at the tip of the coupling shaft 37. Yes.
[0019]
When the liquid resins 21 and 23 are supplied to the side skin surface 36, the liquid resins 21 and 23 flow down as they are due to gravity when the ultrasonic transmission solid horn 17 is not vibrated, but the ultrasonic transmission solid horn 17. As shown in FIG. 3, the liquid resins 21 and 23 are held in a substantially spherical liquid pool 39 by the mixed liquid flow guide 38 as shown in FIG. Since the mixed liquid flow guide 38 is coupled to the ultrasonic transmission solid horn 17 via the coupling shaft 37, it resonates with the ultrasonic vibration of the ultrasonic transmission solid horn 17 and ultrasonically vibrates into the liquid reservoir 39. The ultrasonic vibration is applied from the vibration surface 40 of the ultrasonic transmission solid horn 17 and the reflection surface 41 of the mixed liquid flow guide 38, and the isocyanate 21 and the polyol 23 are mixed. The mixed liquid resin 42 is reduced in the amount retained as the liquid reservoir 39 as the vibration amplitude of the ultrasonic transmission solid horn 17 decreases, so that the loop virtual of the molded product 35 is reduced by the decrease in the vibration amplitude. It is dropped into the loop-shaped groove 43 as a line.
[0020]
Hereinafter, the application of the liquid resin 42 will be described with reference to FIGS. In the figure, (1), (2),... Indicate the moving order of the ultrasonic transmission solid horn 17. The movement of the ultrasonic transmission solid horn 17 is relative to the molded product 35. The XY moving mechanisms 30 and 31 move the molded product 35.
[0021]
In the following, when the positioning / movement of the ultrasonic transmission solid horn 17 is described, the relative positioning / movement of the ultrasonic transmission solid horn 17 with respect to the molded product 35 is meant.
[0022]
In this coating apparatus, the liquid resin 42 is applied to the loop-shaped groove 43 of the molded product 35 repeatedly by a predetermined length so that the traveling direction along the loop-shaped groove 43 is sequentially traced in the reverse direction.
[0023]
That is, in the first application, the ultrasonic transmission solid horn 17 is positioned so that the predetermined position of the loop groove 43 becomes the application start point 44, and the ultrasonic transmission solid horn 17 is vibrated to be liquid. Resins 21 and 23 are supplied and mixed to create a liquid reservoir 39, and the process is started. While moving the ultrasonic transmission solid horn 17 along the loop-shaped groove 43 as shown in (1), the vibration amplitude of the ultrasonic transmission solid horn 17 is decreased and the excess liquid resin 42 is dropped. Is applied for a predetermined length. This application ends at the application end point 45.
[0024]
After the first application is completed, the second application is performed by moving the ultrasonic transmission solid horn 17 as shown by (2) to position it on the first application start point 44 side, The vibration amplitude of the transmission solid horn 17 is increased again, and the liquid resins 21 and 23 are supplied and mixed, and the size of the liquid reservoir 39 is started to be substantially equal to that before the first application. The second application is performed before the film is formed on the liquid resin 42 at the first application start point 44 or with the liquid resin 42 to which the liquid resin 42 at the first application start point 44 is newly applied. The process is started before becoming unfamiliar, and is performed in the reverse direction along the loop-shaped groove 43 with respect to the first application direction as indicated by (3). Further, by opening an appropriate gap between the second application start point and the first application start point 44, the applied liquid resin 42 flows into the gap, and the resin end formed by the first application The resin end by the second application is fused.
[0025]
Similarly, after the second application is completed, the third application is performed by moving the ultrasonic transmission solid horn 17 as shown in (4) and positioning it on the first application end point 45 side. At the same time, the vibration amplitude of the solid horn 17 for ultrasonic transmission is increased again to supply and mix the liquid resins 21 and 23, and the size of the liquid reservoir 39 is started to be substantially equal to that before the first coating is started. The third application is performed before the film is formed on the liquid resin 42 at the first application end point 45 or the liquid resin 42 to which the liquid resin 42 at the first application end point 45 is newly applied. It starts before it becomes difficult to become familiar, and is performed in the opposite direction along the loop-shaped groove 43 with respect to the second application direction as shown in (5). Further, by opening an appropriate gap between the third application start point and the first application end point 45, the applied liquid resin 42 flows into the gap, and the resin end formed by the first application The resin end by the third application is fused.
[0026]
The n-th application after the third application is performed in the reverse direction along the loop groove 43 with respect to the (n-1) -th application direction, with the application start point being the (n-2) -th application end point side. The procedure is the same as in the third application.
[0027]
By repeating this application, a uniform application body is successively formed. For example, in FIG. 3B, the ultrasonic transmission solid horn 17 is moved 15 times, and the application body loop is formed by application of n = 8. It is shown that the coated product is manufactured, but for the final coating that completes the loop of the coated body, the coating length may be too long for the predetermined length. In this case, it is necessary to adjust the dropping amount of the liquid resin 42 so that the liquid resin 42 at the application end point and the liquid resin 42 at the previous application end point are appropriately fused.
[0028]
As mentioned above, although embodiment of invention was described using drawing, the aspect of this invention is not restricted to what was already stated. For example, the coating apparatus shown in FIG. 1 is configured to move the coated body during coating, but may be any configuration as long as the ultrasonic transmission solid horn can move relative to the coated body. In addition, in the coating apparatus, the ultrasonic transmission solid horn is used to apply the liquid resin to the object to be coated. However, there is a possibility of substitution if the liquid resin can be controlled to be discharged and stopped.
[0029]
【The invention's effect】
Since the present invention has the method and configuration as described above, the resin ends to be connected to each other when a liquid resin that cures by reaction is applied to the object to form a loop-shaped application. There is an effect that it is possible to avoid the occurrence of a boundary surface between each other.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a coating apparatus according to an embodiment of the invention.
FIG. 2 is an enlarged view of the vicinity of the lower end of a solid horn for ultrasonic transmission, (a) is a view of the vicinity of the lower end of the solid horn for ultrasonic transmission as viewed obliquely from above; It is the figure which looked at the lower end vicinity of the solid horn for sound wave transmission from diagonally downward.
FIG. 3 is an explanatory view of a coating method according to an embodiment of the invention, and FIG. 3A is a diagram schematically showing a relative positional relationship of an ultrasonic transmission solid horn with respect to an object to be coated; (b) is a figure which illustrates the movement order of the solid horn for ultrasonic transmission of (a).
4A and 4B are explanatory diagrams of a conventional method of applying a liquid resin in a loop shape, in which FIG. 4A is a side view showing the vicinity where an application start point and an application end point are connected, and FIG. It is a figure which shows typically the relative positional relationship with respect to the to-be-coated body of the solid horn for sound wave transmission.
[Explanation of symbols]
35 ... Molded product (Subject to be coated)
42 ... Liquid resin 43 ... Loop groove (loop imaginary line)
44 ... Application start point

Claims

In order to apply a liquid resin that cures by reacting to an object to be coated to form a loop-shaped coated body, the liquid is divided into a plurality of portions along a loop imaginary line and the coating progress direction is sequentially reversed. In the resin application method, the first liquid resin application start point side is defined as the second liquid resin application start point so that the end portions of the liquid resin based on the respective applications merge with each other . The second coating is performed in the direction opposite to the coating progress direction of the first coating, and for the third and subsequent coatings of the liquid resin, the sign n is a natural number of 3 or more, and the coating start point of the nth liquid resin is The liquid resin characterized in that the n-th application is sequentially performed in the direction opposite to the (n-1) -th application progress direction as the application end point of the (n-2) -th liquid resin, thereby completing the loop of the application body. Application method.

Two or more kinds of the liquid resins that react by mixing are mixed with an ultrasonic transmission solid horn having a mixed liquid flow down guide provided at a lower part through a coupling shaft, and the ultrasonic transmission solid horn and the mixed liquid. 2. The liquid according to claim 1, wherein the liquid resin is mixed by being held and mixed as a liquid pool between flow guides, and the liquid resin is dropped and applied by reducing the excitation amplitude of the ultrasonic transmission solid horn. Resin application method.

Between the application start point of the first liquid resin and the application start point of the second liquid resin, and the application end point of the (n-2) th liquid resin and application of the nth liquid resin. 3. The liquid resin coating method according to claim 1, wherein the coating is performed with a gap between each of the starting points.

In order to apply a liquid resin that cures by reacting to an object to be coated to form a loop-shaped coated body, the liquid is divided into a plurality of portions along a loop imaginary line and the coating progress direction is sequentially reversed. A resin coating apparatus, wherein the first liquid resin application start point side is used as a second liquid resin application start point to perform a second application in a direction opposite to the first application direction, With respect to the application of the liquid resin for the third time and thereafter, the sign n is a natural number of 3 or more, and the n-th liquid resin application start point is the (n-2) th liquid resin application end point. The liquid resin coating apparatus is characterized in that the n-th coating is performed in a direction opposite to the coating direction.

In reaction plurality of divided to applying the traveling direction sequentially reversed allowed by the manufacturing method of the loop-shaped coating moldings coated body Ru is formed by intends line application of liquid resin to be cured along a loop virtual line by The first liquid resin application start point is set as the second liquid resin application start point, and the first liquid resin application start point and the second liquid resin application start point. The second coating is performed in the direction opposite to the first coating progression direction with a gap between the first and second coatings, and for the third and subsequent coatings of the liquid resin, the symbol n is a natural number of 3 or more and the nth The application start point of the second liquid resin is set to the (n-2) th liquid resin application end point side, the application end point of the (n-2) th liquid resin, and the application start point of the nth liquid resin, A gap between the n-1th and the coating progression direction By performing the n-th applied in a direction, a manufacturing method of coating a molded article, characterized in that said loop-shaped coating member is Ru provided.