JP2635481B2 - Light curing device - Google Patents
Light curing deviceInfo
- Publication number
- JP2635481B2 JP2635481B2 JP4112741A JP11274192A JP2635481B2 JP 2635481 B2 JP2635481 B2 JP 2635481B2 JP 4112741 A JP4112741 A JP 4112741A JP 11274192 A JP11274192 A JP 11274192A JP 2635481 B2 JP2635481 B2 JP 2635481B2
- Authority
- JP
- Japan
- Prior art keywords
- curing
- ultraviolet
- optical fiber
- orifice
- connecting pipe
- 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 - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/12—General methods of coating; Devices therefor
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は光ファイバなどの線状体
の表面に塗布された紫外線硬化型樹脂液などの光硬化性
被覆材に光を照射して硬化させる装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for irradiating a light-curable coating material such as an ultraviolet-curable resin liquid applied to the surface of a linear body such as an optical fiber with light to cure the material.
【０００２】[0002]
【従来の技術】従来、光ファイバの表面に塗布された紫
外線硬化型樹脂液に光を照射して硬化させ、紫外線硬化
型樹脂からなる被覆層を形成する装置（以下、紫外線硬
化型樹脂硬化装置と略記する。）は図３に示した構成に
なっている。図３中、符号１０は紫外線硬化ユニットで
ある。この紫外線硬化ユニット１０は、内壁に鏡面が形
成されている横断面の形状が楕円状の外筒１と、この外
筒１内に設けられている紫外線に対して透明性の高い材
質からなる二重ジャケット２と、紫外線照射ランプ３と
から概略構成されている。二重ジャケット２は、その中
心に紫外線硬化型樹脂液が塗布された光ファイバ４を走
行させるための空隙部５が形成されており、底部には二
重ジャケット２内に赤外線吸収体６を供給するための供
給管７が接続され、上部には二重ジャケット２内から赤
外線吸収体６を排出するための排出管８が接続されてい
る。赤外線吸収体６は、紫外線領域の光は透過するが、
赤外線領域の光は吸収するものであって、水等が用いら
れている。紫外線照射ランプ３は、これから出射される
紫外線が二重ジャケット２の空隙部５に走行される光フ
ァイバ４に照射するようになっている。2. Description of the Related Art Conventionally, an ultraviolet curing resin liquid applied to the surface of an optical fiber is cured by irradiating it with light to form a coating layer made of an ultraviolet curing resin (hereinafter referred to as an ultraviolet curing resin curing apparatus). Has the configuration shown in FIG. 3. In FIG. 3, reference numeral 10 denotes an ultraviolet curing unit. The ultraviolet curing unit 10 includes an outer cylinder 1 having a mirror surface formed on an inner wall and an elliptical cross section, and a material provided in the outer cylinder 1 and having high transparency to ultraviolet rays. It is roughly composed of a heavy jacket 2 and an ultraviolet irradiation lamp 3. In the center of the double jacket 2, a gap 5 for running the optical fiber 4 coated with the ultraviolet curable resin liquid is formed, and at the bottom, an infrared absorber 6 is supplied into the double jacket 2. A discharge pipe 8 for discharging the infrared absorber 6 from the inside of the double jacket 2 is connected to an upper portion of the supply pipe 7. The infrared absorber 6 transmits light in the ultraviolet region,
Light in the infrared region is absorbed, and water or the like is used. The ultraviolet irradiation lamp 3 is configured to irradiate the ultraviolet light emitted from the ultraviolet irradiation lamp 3 to the optical fiber 4 traveling in the gap 5 of the double jacket 2.
【０００３】ところで、光ファイバの課題としては低コ
スト化が望まれており、これには光ファイバの紡糸線速
の高速化が有効であるとされている。しかしながら、上
記紫外線硬化型樹脂硬化装置を用いる場合は、二重ジャ
ケット２の空隙部５の中心軸上に紫外線硬化型樹脂液が
塗布された光ファイバ４を走行させ、外筒１の内壁に反
射した紫外線によって紫外線硬化型樹脂液を硬化させる
ようになっているため、光ファイバ４の表面に形成され
る被覆層の硬化度は紫外線照射時間に依存し、光ファイ
バ４の紡糸線速を高速化すると被覆層の硬化度が不足し
てしまうという問題があった。このような問題を解決す
るには、上記紫外線硬化ユニット１０を光ファイバ４の
走行方向に多数台設置すればよいが、紡糸ラインの長さ
には制限があるため紫外線硬化ユニット１０の設置台数
には限りがあり、紡糸線速の向上も限りがあった。ま
た、高速硬化タイプの紫外線硬化型樹脂を使用する方
法、紫外線照射ランプ３の発光強度を上げるなどの方法
も試みられているが、これらを用いたとしても紡糸線速
の向上は僅かであり、さらに高速化するのは困難であっ
た。[0003] By the way, as a problem of the optical fiber, it is desired to reduce the cost. To this end, it is said that increasing the spinning speed of the optical fiber is effective. However, when the above-mentioned ultraviolet curing resin curing device is used, the optical fiber 4 coated with the ultraviolet curing resin liquid is caused to run on the central axis of the gap 5 of the double jacket 2 and reflected on the inner wall of the outer cylinder 1. Since the ultraviolet curable resin liquid is cured by the ultraviolet light, the degree of curing of the coating layer formed on the surface of the optical fiber 4 depends on the ultraviolet irradiation time, and the spinning speed of the optical fiber 4 is increased. Then, there was a problem that the degree of curing of the coating layer was insufficient. In order to solve such a problem, a large number of the ultraviolet curing units 10 may be installed in the traveling direction of the optical fiber 4. However, since the length of the spinning line is limited, the number of the ultraviolet curing units 10 to be installed is limited. The spinning speed was limited. In addition, although a method of using a high-speed curing type ultraviolet curable resin and a method of increasing the light emission intensity of the ultraviolet irradiation lamp 3 have been tried, even if these methods are used, the improvement of the spinning linear speed is slight, It was difficult to further increase the speed.
【０００４】この原因の一つとして、光ファイバ４に塗
布された紫外線硬化型樹脂液に紫外線が照射されて、こ
の紫外線硬化型樹脂液が硬化するとき、発熱反応によっ
てこの紫外線硬化型樹脂の成分の一部が蒸気となって、
空隙部５の光ファイバ４の被覆層表面の近傍に存在する
ため、この蒸気が紫外域の光線を吸収してしまい被覆層
の硬化の進行の妨げになっていることが挙げられる。従
来、窒素ガスなどのパージガスを二重ジャケット２の空
隙部５に流して上記蒸気を除去していたが、パージガス
の流量が多過ぎると、光ファイバ４の線ぶれの原因とな
り、被覆層厚が不均一になるという欠点があった。[0004] One of the causes is that when the ultraviolet curable resin liquid applied to the optical fiber 4 is irradiated with ultraviolet rays and the ultraviolet curable resin liquid is cured, a component of the ultraviolet curable resin is generated by an exothermic reaction. Is turned into steam,
Since the vapor exists in the vicinity of the surface of the coating layer of the optical fiber 4 in the void portion 5, the vapor absorbs light in the ultraviolet region and hinders the progress of curing of the coating layer. Conventionally, a purge gas such as a nitrogen gas is flown through the gap 5 of the double jacket 2 to remove the vapor. However, if the flow rate of the purge gas is too large, the optical fiber 4 may be blurred, and the thickness of the coating layer may be reduced. There was a disadvantage that it became uneven.
【０００５】[0005]
【発明が解決しようとする課題】よって、本発明におけ
る課題は、光硬化性被覆材が塗布された線状体の近傍に
存在する蒸気を除去し、光硬化性被覆材の硬化効率の向
上を図ることが可能な光硬化装置を得ることにある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to remove the vapor present in the vicinity of a linear body coated with a photocurable coating material and improve the curing efficiency of the photocurable coating material. An object of the present invention is to provide a light curing device that can be achieved.
【０００６】[0006]
【課題を解決するための手段】本発明の光硬化装置は、
光源を有し、光硬化性被覆材が塗布された線状体を走行
させて、前記光硬化性被覆材を光硬化させる硬化ユニッ
トを線状体の走行方向に２以上設け、これら硬化ユニッ
ト間を連結管で接続し、この連結管内にオリフィスを設
けるとともにこのオリフィス内を走行させる線状体の走
行方向の上流側に排気ダクトを設けた装置である。The light curing device of the present invention comprises:
A light source is provided, and two or more curing units for photocuring the photocurable coating material are provided in the traveling direction of the linear body by running the linear body coated with the photocurable coating material. Are connected by a connecting pipe, an orifice is provided in the connecting pipe, and an exhaust duct is provided on the upstream side in the running direction of the linear body that runs through the orifice.
【０００７】[0007]
【作用】本発明の光硬化装置では、光硬化性被覆材が塗
布された線状体の近傍に存在する蒸気を連結管内のオリ
フィスの上方に溜め、この蒸気を排気ダクトから外部に
排出するので、この蒸気が光硬化性被覆材を硬化させる
ための光を吸収して硬化の進行の妨げとなることを少な
くすることができ、光硬化性被覆材の硬化効率が向上
し、光硬化性被覆材が塗布された線状体を光硬化装置内
に高速で挿通しても被覆層の硬化度が不足することが少
なくなる。また、連結管内に設けるオリフィスと、この
オリフィス内を走行させる線状体の走行方向の上流側に
設ける排気ダクトはそれぞれ一つずつとは限らず、複数
個ずつ設けてもよい。In the photo-curing apparatus of the present invention, the vapor existing near the linear body coated with the photo-curable coating material is stored above the orifice in the connecting pipe, and this vapor is discharged from the exhaust duct to the outside. It is possible to reduce that the vapor absorbs light for curing the photocurable coating material and hinder the progress of the curing, thereby improving the curing efficiency of the photocurable coating material and improving the photocurable coating material. Even when the linear body coated with the material is inserted at a high speed into the photo-curing apparatus, the degree of curing of the coating layer is less likely to be insufficient. Further, the number of orifices provided in the connecting pipe and the number of exhaust ducts provided on the upstream side in the traveling direction of the linear body traveling in the orifice are not limited to one each, and a plurality of exhaust ducts may be provided.
【０００８】[0008]
【実施例】以下に実施例をあげて本発明を具体的に説明
するが、もちろん本発明の主旨および適用範囲は、これ
らの実施例により制限されるものではない。図１は、本
発明の光硬化装置を紫外線硬化型樹脂硬化装置に適用し
た一実施例を示した図である。尚、従来例と同一構成部
分には、同一符号を付して説明を簡略化する。EXAMPLES The present invention will now be described in detail with reference to examples, but the gist and scope of the present invention are not limited by these examples. FIG. 1 is a view showing an embodiment in which the light curing device of the present invention is applied to an ultraviolet curing resin curing device. The same components as those of the conventional example are denoted by the same reference numerals, and the description will be simplified.
【０００９】この紫外線硬化型樹脂硬化装置が図３に示
した従来の紫外線硬化型樹脂硬化装置と異なるところ
は、紫外線硬化ユニット１０が光ファイバ４の走行方向
に沿って２台以上設置されており、これら紫外線硬化ユ
ニット１０間が連結管２１で接続され、この連結管２１
内にオリフィス２３が設けられるとともにこのオリフィ
ス２３内を走行させる光ファイバ４の走行方向の上流側
に排気ダクト２４が設けられている点である。The difference between this ultraviolet curing resin curing device and the conventional ultraviolet curing resin curing device shown in FIG. 3 is that two or more ultraviolet curing units 10 are installed along the running direction of the optical fiber 4. , These ultraviolet curing units 10 are connected by a connecting pipe 21.
An orifice 23 is provided therein, and an exhaust duct 24 is provided on the upstream side in the running direction of the optical fiber 4 running in the orifice 23.
【００１０】連結管２１は、中心軸上に光ファイバ４を
走行させる円筒状の本体２１ａと、これに垂直に接続さ
れている枝管２１ｂとからなるものである。本体２１ａ
の一端はこれの中心軸上を走行させる光ファイバ４の走
行方向の上流側に設置されている紫外線硬化ユニット１
０の二重ジャケット２の光ファイバの出口２ｂと接続さ
れており、一方、他端はこれの中心軸上を走行させる光
ファイバ４の走行方向の下流側に設置されている紫外線
硬化ユニット１０の二重ジャケット２の光ファイバの挿
入口２ａと接続され、二重ジャケット２の空隙部５に走
行させた光ファイバ４の近傍に存在している蒸気が光フ
ァイバ４の走行に伴って二重ジャケット２の光ファイバ
の出口２ｂから連結管２１内に流入するようになってい
る。ここでの接続は、光ファイバ４の近傍に存在する蒸
気を効率良く排気するため、上記接続部から連結管２１
内に外気が侵入するのを防止できるようになっている。The connecting pipe 21 comprises a cylindrical main body 21a for running the optical fiber 4 on the central axis, and a branch pipe 21b vertically connected to the main body. Main body 21a
One end of the ultraviolet curing unit 1 is installed on the upstream side in the running direction of the optical fiber 4 running on the central axis of the unit.
0 is connected to the outlet 2b of the optical fiber of the double jacket 2, while the other end of the ultraviolet curing unit 10 installed on the downstream side in the running direction of the optical fiber 4 running on the central axis thereof. The vapor which is connected to the optical fiber insertion port 2a of the double jacket 2 and is present near the optical fiber 4 which has been moved to the gap 5 of the double jacket 2 causes the double jacket to travel as the optical fiber 4 travels. The second optical fiber flows into the connecting pipe 21 from the outlet 2b of the optical fiber. In this connection, in order to efficiently exhaust the vapor present in the vicinity of the optical fiber 4, the connection portion is connected to the connecting pipe 21.
It is designed to prevent outside air from entering inside.
【００１１】また、枝管２１ｂとの接続部より下方であ
って、本体２１ａ内を走行させる光ファイバ４の走行方
向の下流側に設置されている紫外線硬化ユニット１０の
二重ジャケット２の挿入口２ａとの接続部より上方の本
体２１ａの内面２１ｃにはオリフィス２３が取り付けら
れており、連結管２１内に流入した蒸気をこのオリフィ
ス２３の上方に溜めて、本体２１ａ内を走行させる光フ
ァイバ４の走行方向の下流側に設置されている紫外線硬
化ユニット１０の二重ジャケット２の空間部５にできる
だけ流れこまないようになっている。このオリフィス２
３の穴２３ａの径は、これに走行させる光ファイバ４が
接触しない程度でできるだけ小さい方がよく、１．５〜
３ｍｍ程度であることが望ましい。穴２３ａの径が大き
過ぎると、二重ジャケット２の空隙部５に走行させた光
ファイバ４の近傍に存在する蒸気を連結管２１内のオリ
フィス２３の上方に溜めることができず、この蒸気を排
気ダクト２４によって効率よく外部に排気することがで
きない。また、穴２３ａの径が小さ過ぎると線ぶれ等で
光ファイバ４がオリフィス２３と接触してしまい、被覆
層厚が不均一になってしまう。The insertion opening of the double jacket 2 of the ultraviolet curing unit 10 installed below the connection with the branch pipe 21b and downstream in the running direction of the optical fiber 4 running inside the main body 21a. An orifice 23 is attached to the inner surface 21c of the main body 21a above the connection with the main body 2a, and the optical fiber 4 which accumulates the vapor flowing into the connecting pipe 21 above the orifice 23 and travels inside the main body 21a. In the space 5 of the double jacket 2 of the ultraviolet curing unit 10 installed on the downstream side in the running direction. This orifice 2
The diameter of the hole 23a is preferably as small as possible so that the optical fiber 4 does not contact the hole 23a.
Desirably, it is about 3 mm. If the diameter of the hole 23a is too large, the vapor present in the vicinity of the optical fiber 4 that has traveled to the gap 5 of the double jacket 2 cannot be stored above the orifice 23 in the connecting pipe 21, and this vapor is The exhaust duct 24 cannot efficiently exhaust air to the outside. On the other hand, if the diameter of the hole 23a is too small, the optical fiber 4 comes into contact with the orifice 23 due to blurring or the like, and the coating layer thickness becomes uneven.
【００１２】さらに、枝管２１ｂの開口端２１ｄには排
気ダクト２４が取り付けられており、上記オリフィス２
３によって連結管２１内に溜められた蒸気を枝管２１ｂ
より外部に排気できるようになっている。この排気ダク
ト２４の排気圧は０．５〜１０ｍｍＨ2Ｏ程度であるこ
とが望ましい。排気圧が大き過ぎると、光ファイバ４の
線ぶれの原因となり、被覆層厚が不均一になってしま
う。また、排気圧が小さ過ぎると二重ジャケット２の空
隙部５に走行させた光ファイバ４の近傍に存在している
蒸気を効率良く排気することができない。An exhaust duct 24 is attached to the open end 21d of the branch pipe 21b.
The steam accumulated in the connecting pipe 21 by the pipe 3 is transferred to the branch pipe 21b.
It can be exhausted to the outside. Exhaust pressure of the exhaust duct 24 is preferably a 2 O about 0.5～10MmH. If the exhaust pressure is too large, the optical fiber 4 will be blurred, and the thickness of the coating layer will be non-uniform. On the other hand, if the exhaust pressure is too low, the vapor present in the vicinity of the optical fiber 4 that has traveled to the gap 5 of the double jacket 2 cannot be efficiently exhausted.
【００１３】このような紫外線硬化型樹脂硬化装置を用
いて光ファイバ４の表面に紫外線硬化型樹脂からなる被
覆層を形成するには、以下の工程による。まず、光ファ
イバ４を紫外線硬化型樹脂液が充填された樹脂コータ
（図示略）に挿通して、その表面に紫外線硬化型樹脂液
を塗布する。ついで、この紫外線硬化型樹脂液が塗布さ
れた光ファイバ４を最初に設置されている紫外線硬化ユ
ニット１０の二重ジャケット２の挿通口２ａよりこれの
空隙部５の中心軸上に一定速度で走行させる。このとき
二重ジャケット２の供給管７から赤外線吸収体６を二重
ジャケット２内に供給するとともにこの赤外線吸収体６
を排出管８から吸引して、赤外線吸収体６を二重ジャケ
ット２内で流動させる。ついで、紫外線照射ランプ３か
ら紫外線を出射し、この紫外線を二重ジャケット２を介
して光ファイバ４に照射すると、紫外線と共に出射され
る赤外線が上記赤外線吸収体６によって吸収され、紫外
線のみが光ファイバ４に照射され、紫外線硬化型樹脂液
の硬化が開始する。そして、光ファイバ４を二重ジャケ
ット２の光ファイバの出口２ｂより連結管２１の本体２
１ａの中心軸上に挿通する。このとき、光ファイバ４に
伴なって連結管２１内に流入してオリフィス２３の上方
に溜められる蒸気を排気ダクト２４によって外部に排気
する。続いて、この光ファイバ４をその走行方向の下流
に設置されている紫外線硬化ユニット１０内および連結
管２１内に上記と同様にして走行させる。In order to form a coating layer made of an ultraviolet-curable resin on the surface of the optical fiber 4 using such an ultraviolet-curable resin curing device, the following steps are performed. First, the optical fiber 4 is inserted into a resin coater (not shown) filled with an ultraviolet curable resin liquid, and the surface thereof is coated with the ultraviolet curable resin liquid. Then, the optical fiber 4 coated with the UV-curable resin liquid travels at a constant speed from the insertion port 2a of the double jacket 2 of the UV-curing unit 10 installed at the center on the center axis of the gap 5 thereof. Let it. At this time, the infrared absorber 6 is supplied into the double jacket 2 from the supply pipe 7 of the double jacket 2 and the infrared absorber 6
Is sucked from the discharge pipe 8 to cause the infrared absorber 6 to flow in the double jacket 2. Next, when ultraviolet rays are emitted from the ultraviolet irradiation lamp 3 and the ultraviolet rays are applied to the optical fiber 4 through the double jacket 2, infrared rays emitted together with the ultraviolet rays are absorbed by the infrared absorber 6, and only the ultraviolet rays are emitted from the optical fiber. 4 to start curing of the ultraviolet-curable resin liquid. Then, the optical fiber 4 is connected to the main body 2 of the connecting pipe 21 through the optical fiber outlet 2 b of the double jacket 2.
1a on the central axis. At this time, the steam flowing into the connection pipe 21 along with the optical fiber 4 and stored above the orifice 23 is exhausted to the outside by the exhaust duct 24. Subsequently, the optical fiber 4 is caused to travel in the ultraviolet curing unit 10 and the connecting pipe 21 installed downstream in the traveling direction in the same manner as described above.
【００１４】この紫外線硬化型樹脂硬化装置では、紫外
線硬化型樹脂液が塗布された光ファイバ４の近傍に存在
する蒸気を連結管２１内のオリフィス２３の上方に溜
め、この蒸気を排気ダクト２４によって外部に排出する
ので、この蒸気が紫外線硬化型樹脂液を硬化させるため
の紫外線を吸収して硬化の進行の妨げとなることを少な
くすることができ、紫外線硬化型樹脂液の硬化効率が向
上し、紫外線硬化型樹脂液が塗布された光ファイバ４を
紫外線硬化型樹脂硬化装置に高速で挿通しても被覆層の
硬化度が不足することが少なくなる。従って、紫外線硬
化型樹脂硬化装置内に紫外線硬化型樹脂液が塗布された
光ファイバ４を挿通させる線速の高速化が可能となり、
光ファイバ４のコストダウンが実現できる。In this ultraviolet curing resin curing device, the vapor existing near the optical fiber 4 coated with the ultraviolet curing resin liquid is collected above the orifice 23 in the connecting pipe 21, and this vapor is discharged by the exhaust duct 24. Since it is discharged to the outside, it is possible to reduce the possibility that this vapor absorbs ultraviolet rays for curing the ultraviolet-curable resin liquid and hinders the progress of the curing, thereby improving the curing efficiency of the ultraviolet-curable resin liquid. Even when the optical fiber 4 coated with the ultraviolet-curable resin liquid is inserted at a high speed into the ultraviolet-curable resin curing device, the degree of insufficient curing of the coating layer is reduced. Therefore, it is possible to increase the linear speed at which the optical fiber 4 coated with the ultraviolet-curable resin liquid is inserted into the ultraviolet-curable resin curing device,
The cost of the optical fiber 4 can be reduced.
【００１５】（実施例）図１と同様の紫外線硬化ユニッ
ト１０を光ファイバ４の走行方向に沿って４台設置し、
これら紫外線硬化ユニット１０間をオリフィス２３と排
気ダクト２４が設けられている連結管２１（計３本）で
接続し紫外線硬化型樹脂硬化装置を得た。連結管２１に
設けられるオリフィス２３の穴２３ａの径は２ｍｍ、排
気ダクト２４の排気圧は３ｍｍＨ2Ｏとした。(Embodiment) Four ultraviolet curing units 10 similar to those shown in FIG. 1 are installed along the running direction of the optical fiber 4,
These ultraviolet curing units 10 were connected to each other by connecting pipes 21 (three in total) provided with an orifice 23 and an exhaust duct 24 to obtain an ultraviolet curing resin curing device. Diameter of the hole 23a of the orifice 23 provided in the connecting pipe 21 is 2 mm, the exhaust pressure of the exhaust duct 24 was 3mmH 2 O.
【００１６】（比較例）実施例の紫外線硬化型樹脂硬化
装置において、オリフィス２３と排気ダクト２４が設け
られている連結管２１で紫外線硬化ユニット１０間を接
続しない以外は同様にして紫外線硬化型樹脂硬化装置を
得た。(Comparative Example) In the ultraviolet curing resin curing apparatus of the embodiment, the ultraviolet curing resin is the same except that the connection between the ultraviolet curing units 10 is not connected by the connecting pipe 21 provided with the orifice 23 and the exhaust duct 24. A curing device was obtained.
【００１７】ついで、径１２５μｍの光ファイバ１の表
面に厚さ約２００μｍ一次被覆層が形成した後、さらに
これの表面にウレタン−アクルレート系紫外線硬化型樹
脂液を塗布し、この光ファイバ１を上記実施例および比
較例の紫外線硬化型樹脂硬化装置に種々の紡糸線速で走
行させ、紫外線硬化型樹脂液を硬化させて厚さ約２５０
μｍの二次被覆層を形成し、この時の紡糸線速（ｍ／
分）と二次被覆層のヤング率（Ｋｇ／ｍｍ2）との関係
を調べた。その結果を図２に示す。図２中、曲線は実
施例の紫外線硬化型樹脂硬化装置に挿通した光ファイバ
１の二次被覆層、曲線は比較例の紫外線硬化型樹脂硬
化装置に挿通した光ファイバ１の二次被覆層を表す。Then, after a primary coating layer having a thickness of about 200 μm is formed on the surface of the optical fiber 1 having a diameter of 125 μm, a urethane-accurate-based UV-curable resin solution is further applied to the surface of the primary coating layer. The ultraviolet-curable resin curing devices of Examples and Comparative Examples were run at various spinning line speeds to cure the ultraviolet-curable resin liquid to a thickness of about 250.
A secondary coating layer having a thickness of μm was formed, and the spinning linear speed (m /
) And the Young's modulus (Kg / mm 2 ) of the secondary coating layer were examined. The result is shown in FIG. In FIG. 2, the curve indicates the secondary coating layer of the optical fiber 1 inserted into the ultraviolet curing resin curing device of the embodiment, and the curve indicates the secondary coating layer of the optical fiber 1 inserted into the ultraviolet curing resin curing device of the comparative example. Represent.
【００１８】図２に示した結果から明らかなように、紡
糸線速５００（ｍ／分）までは、曲線と曲線の傾き
はあまり差はないが、紡糸線速がさらに高速化すると曲
線のほうがヤング率の低下が少ないことが確認でき
る。従って、実施例の紫外線硬化型樹脂硬化装置を用い
た光ファイバ４の二次被覆層の方が比較例の紫外線硬化
型樹脂硬化装置を用いた光ファイバ４の二次被覆層に比
べて高速線引き時における被覆層の硬化度が優れている
ことが分かる。As is apparent from the results shown in FIG. 2, there is not much difference between the curve and the slope of the curve up to a spinning linear speed of 500 (m / min). It can be confirmed that the decrease in the Young's modulus is small. Therefore, the secondary coating layer of the optical fiber 4 using the ultraviolet curing resin curing device of the embodiment is drawn at a higher speed than the secondary coating layer of the optical fiber 4 using the ultraviolet curing resin curing device of the comparative example. It can be seen that the degree of cure of the coating layer at the time is excellent.
【００１９】[0019]
【発明の効果】以上説明したように本発明の光硬化装置
では、光硬化性被覆材が塗布された線状体の近傍に存在
する蒸気を連結管内のオリフィスの上方に溜め、この蒸
気を排気ダクトから外部に排出するので、上記蒸気が光
硬化性被覆材を硬化させるための光を吸収して硬化の進
行の妨げとなることを少なくすることができ、光硬化性
被覆材の硬化効率が向上し、光硬化性被覆材が塗布され
た線状体を光硬化装置内に高速で挿通しても被覆層の硬
化度が不足することが少なくなる。従って光硬化装置内
に線状体を挿通させる速度の高速化が可能となり、製品
のコストダウンが実現できるという利点がある。As described above, in the photocuring apparatus according to the present invention, the vapor existing near the linear body coated with the photocurable coating material is collected above the orifice in the connecting pipe, and this vapor is exhausted. Since it is discharged to the outside from the duct, it is possible to reduce that the vapor absorbs light for curing the photocurable coating material and hinders the progress of curing, and the curing efficiency of the photocurable coating material is reduced. Even if the linear body coated with the photocurable coating material is inserted into the photocuring device at a high speed, the degree of curing of the coating layer is less likely to be insufficient. Therefore, there is an advantage that the speed at which the linear body is inserted into the light curing device can be increased, and the cost of the product can be reduced.
【図１】 本発明の一実施例の紫外線硬化型樹脂硬化装
置を示した概略構成図である。FIG. 1 is a schematic configuration diagram showing an ultraviolet curing resin curing device according to one embodiment of the present invention.
【図２】 紡糸線速と二次被覆層のヤング率との関係を
示したグラフである。FIG. 2 is a graph showing the relationship between spinning speed and Young's modulus of a secondary coating layer.
【図３】 従来の紫外線硬化型樹脂硬化装置の一例を示
した概略構成図である。FIG. 3 is a schematic configuration diagram showing an example of a conventional ultraviolet curing resin curing device.
１・・・外筒、２・・・二重ジャケット、２ａ・・・挿入口、２
ｂ・・・出口、３・・・紫外線照射ランプ、４・・・光ファイ
バ、５・・・空隙部、６・・・赤外線吸収体、７・・・供給管、
８・・・排気管、１０・・・紫外線硬化ユニット、２１・・・連
結管、２１ａ・・・本体、２１ｂ・・・枝管、２１ｃ・・・内
面、２１ｄ・・・開口端、２３・・・オリフィス、２３ａ・・・
穴、２４・・・排気ダクト1 ... outer cylinder, 2 ... double jacket, 2a ... insertion port, 2
b ... outlet, 3 ... ultraviolet irradiation lamp, 4 ... optical fiber, 5 ... void, 6 ... infrared absorber, 7 ... supply tube,
8 ... exhaust pipe, 10 ... ultraviolet curing unit, 21 ... connecting pipe, 21a ... body, 21b ... branch pipe, 21c ... inner surface, 21d ... open end, 23 ... ..Orifices, 23a ...
Hole, 24 ... exhaust duct
Claims (2)
た線状体を走行させて、前記光硬化性被覆材を光硬化さ
せる硬化ユニットを線状体の走行方向に２以上設け、こ
れら硬化ユニット間を連結管で接続し、この連結管内に
オリフィスを設けるとともにこのオリフィス内を走行さ
せる線状体の走行方向の上流側に排気ダクトを設けた光
硬化装置。1. A linear unit having a light source and having a light-curable coating material applied thereon is run, and two or more curing units for photo-curing the photocurable coating material are provided in the running direction of the linear body. A light curing device in which the curing units are connected by a connecting pipe, an orifice is provided in the connecting pipe, and an exhaust duct is provided on the upstream side in the running direction of the linear body running in the orifice.
する請求項１記載の光硬化装置。2. The photo-curing apparatus according to claim 1, wherein the linear body is an optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4112741A JP2635481B2 (en) | 1992-05-01 | 1992-05-01 | Light curing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4112741A JP2635481B2 (en) | 1992-05-01 | 1992-05-01 | Light curing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05306148A JPH05306148A (en) | 1993-11-19 |
| JP2635481B2 true JP2635481B2 (en) | 1997-07-30 |
Family
ID=14594394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4112741A Expired - Fee Related JP2635481B2 (en) | 1992-05-01 | 1992-05-01 | Light curing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2635481B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09278495A (en) * | 1996-04-19 | 1997-10-28 | At & T Ipm Corp | Method for executing high-speed film formation and curing of optical fiber |
-
1992
- 1992-05-01 JP JP4112741A patent/JP2635481B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05306148A (en) | 1993-11-19 |
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