JP2006263592A - Apparatus for coating delayed photocurable resin and method for coating delayed photocurable resin using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for coating a delayed photocurable resin capable of preventing deterioration of an object to be coated caused by ultraviolet rays, and the delayed photocurable resin from flowing and spreading to and on the object to be coated after coating, and coating the delayed photocurable resin on the object to be coated for curing without exposing the object to be coated to ultraviolet rays at all, and a method for coating a delayed photocurable resin using the apparatus. <P>SOLUTION: The apparatus 1 for coating a delayed photocurable resin comprises an ultraviolet irradiation device 5, and a dispenser device 2, wherein the dispenser device 2 has a transparent light receiving portion for casting ultraviolet rays emitted from the ultraviolet irradiation device 5 onto the delayed photocurable resin, and a discharge portion 4 for discharging the delayed photocurable resin after irradiation with ultraviolet ray on the object to be coated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a delayed photocurable resin coating apparatus and a delayed photocurable resin coating method using the same.

In a conventional method of applying an ultraviolet curable resin, an ultraviolet curable resin is generally applied to an object to be coated and then cured by irradiation with ultraviolet rays (see, for example, Patent Document 1 or 2).
JP 2003-168765 A JP 2003-195345 A

  However, the conventional application method has the following problems because the application of the ultraviolet curable resin and the irradiation of the ultraviolet rays are performed in different steps with a time difference. For example, there is a problem that dust or dust adheres to the ultraviolet curable resin between the coating process and the irradiation process, causing poor connection or deteriorating the appearance.

  Further, when actually trying to irradiate ultraviolet rays, there is a problem that the applied ultraviolet curable resin is shaded by other components on the object to be coated, resulting in insufficient irradiation.

  Further, as shown in FIG. 8, when the flexible circuit board 20 is connected to the terminal portion 19 of the liquid crystal display panel composed of the two transparent substrates 17 and 17 bonded together with the sealing material 18, for protection and reinforcement. An ultraviolet curable resin 16 is applied. Since this ultraviolet curable resin 16 has a low viscosity and a high fluidity in an uncured state before irradiation, it spreads little by little until it is applied and cured by irradiation, and the end surface of the upper transparent substrate 17 In some cases, the sealing material 18 may adhere.

  When ultraviolet rays are irradiated in this state, the ultraviolet curable resin 16 shrinks in the direction indicated by the arrow 21 during curing, and therefore the direction indicated by the arrow 22 that spreads the two transparent substrates 17 and 17. As a result, stress is generated, the gap between the two transparent substrates 17 and 17 is increased, the uniformity of the internal liquid crystal layer (not shown) is impaired, and the appearance is poor.

  Further, when the ultraviolet curable resin 16 applied to the terminal portion 19 of the liquid crystal display panel is irradiated with ultraviolet rays, the liquid crystal layer is exposed together with the excess ultraviolet rays, and the liquid crystal deteriorates and decomposes, resulting in the characteristics of the liquid crystal display panel. There was also a problem of a drop.

  In view of the above-mentioned problems of the prior art, the present invention prevents the coated object from being exposed to ultraviolet rays, preventing deterioration of the coated object due to ultraviolet rays and spreading of the delayed photocurable resin after coating. An object of the present invention is to provide a delay type photocurable resin coating apparatus that can apply and cure a delay type photocurable resin on an object to be coated, and a delay type photocurable resin coating method using the same.

To solve this problem,
The invention according to claim 1 includes an ultraviolet irradiation device and a dispenser device, wherein the dispenser device irradiates the delayed photocurable resin with ultraviolet rays emitted from the ultraviolet irradiation device; A delay type photocurable resin coating apparatus comprising: a discharge unit that discharges the delayed type photocurable resin after ultraviolet irradiation onto an object to be coated.

  The invention according to claim 2 is the delayed photocurable resin coating apparatus according to claim 1, wherein the ultraviolet irradiation device is provided in a ring shape around the light receiving portion.

  The invention according to claim 3 irradiates the delayed photocurable resin with ultraviolet rays inside the delayed photocurable resin coating device using the delayed photocurable resin coating device according to claim 1 or 2. Then, this is a delayed photocurable resin coating method characterized in that it is applied by discharging it onto an object to be coated.

  According to the delayed photocurable resin coating apparatus of the present invention and the delayed photocurable resin coating method using the same, an ultraviolet irradiation device and a dispenser device are provided in the delayed photocurable resin coating device, and the ultraviolet irradiation is performed. By irradiating the delayed photo-curing resin with ultraviolet rays generated from the equipment, the delayed photo-curing resin after irradiation is discharged onto the coated object, so that the coated object is completely exposed to ultraviolet rays. Therefore, it is possible to prevent the deterioration of the coated object due to ultraviolet rays and the spread of the delayed photocurable resin after coating, and to apply and cure the delayed photocurable resin on the coated object. .

  In addition, according to the present invention, since the conventional two steps of the coating step and the irradiation step are not required, the time difference between the coating step and the irradiation step can be shortened, and these can be performed in a lump, and the work time can be reduced. It can be shortened.

  Hereinafter, an example of a delay type photocurable resin coating apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a schematic configuration diagram of a delay type photocurable resin coating apparatus 1 according to the present embodiment. FIG. 2 is a schematic cross-sectional view of the delay type photocurable resin coating apparatus 1. The delayed photocurable resin coating apparatus 1 according to the present embodiment is generally configured by a dispenser device 2 and an ultraviolet irradiation device 5.

  In this delay type photocurable resin coating apparatus 1, when the delay type photocurable resin 8 accommodated in the reservoir 9 passes through the transparent light receiving unit 3, it emits ultraviolet rays emitted from the ultraviolet irradiation device 5. After being irradiated from the part 10, it is carried to the discharge part 4 and discharged.

  The dispenser device 2 is formed of a cylindrical container, and a cylindrical reservoir 9 for storing the delayed photocurable resin 8 is provided therein. Above the reservoir 9, there are a resin supply pipe 6 for supplying the delay type photocurable resin 8 and a gas supply pipe 7 for supplying air or gas for extruding the delay type photocurable resin 8. Is provided. As a mechanism for pushing out the delay type photocurable resin 8, a plunger may be provided in the reservoir 9.

  In addition, a thin cylindrical discharge unit 4 for discharging the delayed photocurable resin 8 onto an object to be coated is attached to the lower part of the reservoir 9, and the upper part of the discharge unit 4 can transmit ultraviolet rays. The light receiving portion 3 is formed of a transparent material such as quartz glass.

  The ultraviolet irradiation device 5 is generally composed of a known light source (not shown) such as a lamp that generates ultraviolet rays and a radiation unit 10 that emits the ultraviolet rays. The ultraviolet irradiation device 5 is disposed on the side surface of the dispenser device 2 so that the radiation unit 10 is close to the transparent light receiving unit 3 provided in the dispenser device 2.

  The radiating portion 10 has a vertically long rectangular shape, and has a larger area than the light receiving surface of the light receiving portion 3 so that the transparent light receiving portion 3 can be efficiently irradiated with ultraviolet rays. Moreover, it is preferable that the distance of the radiation | emission part 10 and the light-receiving part 3 is 1-20 mm so that sufficient irradiation amount can reach | attain the light-receiving part 3. FIG. Furthermore, in order to more efficiently irradiate the irradiation light from the radiating unit 10, it is preferable to provide a reflecting wall whose reflecting surface is a wall surface of the path from the radiating unit 10 to the light receiving unit 3. It is more preferable that the reflection wall is surrounded by a reflection wall, a part of the reflection wall is opened, and the radiating portion 10 is disposed in the opening.

  In the present embodiment, the upper part of the ejection unit 4 is the light receiving unit 3, but the light receiving unit 3 may be a part other than the ejection port at the tip of the ejection unit 4 in order to increase the irradiation amount. Alternatively, the reservoir 9 may be formed of a transparent material to form the light receiving unit 3, but in order to efficiently irradiate the delayed photocurable resin 8 with ultraviolet rays, the delayed photocurable resin 8 has a smaller volume. Therefore, it is preferable to form the light receiving part 3 in the discharge part 4 rather than the reservoir part 9.

  According to the delay type photocurable resin coating apparatus 1 of the present embodiment, the ultraviolet irradiation device 5 and the dispenser device 2 are provided, and the ultraviolet light emitted from the ultraviolet irradiation device 5 is delayed by the light receiving unit 3 in the dispenser device 2. By making it possible to irradiate the mold photocurable resin 8, the delayed photocurable resin 8 after irradiation can be discharged onto the object to be coated. As a result, it is not necessary to prepare a large ultraviolet irradiation device separately from the dispenser device, so that the device can be reduced in size and simplified.

  Further, since the delayed type photo-curable resin 8 after irradiation can be discharged onto the object to be coated, the object to be coated is not exposed to ultraviolet rays at all, and the deterioration of the object to be coated by ultraviolet rays can be prevented. it can.

  Next, the delay type photocurable resin coating method using the delay type photocurable resin coating apparatus 1 of this embodiment will be described.

  The light delayed curable resin 8 is different from a normal ultraviolet curable resin that cures immediately in seconds when irradiated with ultraviolet rays, but remains liquid when irradiated with an appropriate amount of ultraviolet rays, but gradually cures. To do. Therefore, it is generally used to bond non-transmissive members that cannot be directly irradiated with ultraviolet rays by utilizing the fact that, after being irradiated with ultraviolet rays for several seconds and then adhering the adherends, the curing is delayed and bonding is possible. ing. Examples of such a light delayed curable resin 8 include 3115B manufactured by ThreeBond.

  First, after the delay type photocurable resin 8 is once stored in the reservoir 9 inside the dispenser device 2, air or the like is gradually sent from the gas supply pipe 7, and the delay type photocurable resin 8 is sent to the discharge unit 4. To pay. Since the delayed photocurable resin 8 is in a liquid state before being irradiated with ultraviolet rays, the delayed photocurable resin 8 can be sufficiently extruded from the reservoir 9 with air or the like and fed.

  Next, when the delayed photocurable resin 8 passes through the light receiving unit 3 above the ejection unit 4, the radiation unit 10 irradiates ultraviolet rays. At this time, the pressure of air or the like sent from the gas supply pipe 7 is changed to adjust the flow rate of the delayed photocurable resin 8, and an appropriate irradiation amount is delayed photocured while passing through the light receiving unit 3. It is preferable that the conductive resin 8 is irradiated.

The wavelength of the ultraviolet rays is preferably 200 to 400 nm, and the irradiation amount is preferably 2000 to 3000 mJ / cm ² in total. This is because, when the irradiation amount is 2000 to 3000 mJ / cm ² , curing starts and ends in an appropriate time. If it is the said irradiation amount, the fluidity | liquidity and tackiness of resin will lose | disappear after 3 minutes, and hardening will be complete | finished.

  Within 1 to 2 minutes after the ultraviolet irradiation, the delay type photocurable resin 8 is extruded from the discharge unit 4 and discharged onto the object to be coated. At this time, if the delay type photocurable resin 8 remains in the discharge unit 4 even a little, it will be hardened and clogged in the discharge unit 4, so that the delayed type photocurable resin 8 after irradiation is pushed out in its entirety. Is preferred.

  By applying the delayed photocurable resin 8 within 1 to 2 minutes after the ultraviolet irradiation, the delayed photocurable resin 8 is applied in a state having an appropriate viscosity, not in a liquid state. It is possible to prevent the delay type photocurable resin 8 from flowing and spreading on the coated material. As a result, the delay type photocurable resin 8 can be applied in a spot shape only to the portion to be applied.

  Further, according to this coating method, since the conventional two steps of the coating step and the irradiation step are not required, the time difference between the coating step and the irradiation step can be shortened, and these can be performed at once. Work time can be shortened.

  In addition, since the ultraviolet rays are not irradiated after being applied as in the conventional case, the delayed photocurable resin 8 is also applied to a non-transparent material to be applied or a portion behind other components. Can be cured.

[Second Embodiment]
FIG. 3 is a schematic configuration diagram of the delay type photocurable resin coating apparatus 1 according to the present embodiment. FIG. 4 is an enlarged view of a main part of the ultraviolet irradiation device 5 of the delayed photocurable resin coating apparatus 1, and FIG. 5 is a cross-sectional view of the main part of the ultraviolet irradiation device 5. This embodiment is the same as the first embodiment except that the ultraviolet irradiation device 5 is provided around the light receiving unit 3 in a ring shape, and thus the description thereof is omitted.

  The ultraviolet irradiation device 5 according to the present embodiment guides the ultraviolet rays generated from the light source 12 through the optical fibers 11, 11... A radiating portion 10 having an end face is provided so that irradiation can be performed from the entire circumference of the light receiving portion 3. By providing the ultraviolet irradiation device 5 around the light receiving unit 3 in a ring shape, the delayed photocurable resin 8 passing therethrough can be efficiently irradiated with ultraviolet rays from the entire circumference.

[Third Embodiment]
FIG. 6 is a cross-sectional view of a main part of the ultraviolet irradiation device 5 of the delayed photocurable resin coating apparatus according to the present embodiment. This embodiment is the same as the second embodiment except that ultraviolet light LEDs having a wavelength of 365 nm are used for the light sources 13, 13... Of the ultraviolet irradiation device 5 and the light source 13 is provided in a ring shape around the light receiving unit 3. Therefore, the description thereof is omitted.

  In the second embodiment, a plurality of end faces of the optical fibers 11, 11... Are arranged in the radiating unit 10 so that the light receiving unit 3 can be directly irradiated. The light receiving unit 3 can be irradiated from light sources 13, 13... Provided in the radiating unit 10 with an inner wall 14 made of transparent quartz glass.

  Next, FIG. 7 shows an example in which the delay type photocurable resin 15 is applied to the terminal portion of the liquid crystal display panel using the delay type photocurable resin coating apparatus and the coating method of the present invention. Unlike the case of the conventional coating method shown in FIG. 8, the delay type photocurable resin 15 has an appropriate viscosity, and therefore does not flow on the transparent substrate 17 and adheres to the end face of the transparent substrate 17 or the sealing material 18. It can apply | coat only to a desired part in the spot form, without.

  Further, since it does not adhere to the end face of the transparent substrate 17 or the sealing material 18, the gap between the two transparent substrates 17 and 17 is not changed. Furthermore, since the liquid crystal layer is not exposed to ultraviolet rays, a good liquid crystal display panel can be manufactured without deterioration or decomposition of the liquid crystal.

It is a schematic block diagram of the delay type photocurable resin coating apparatus which concerns on 1st Embodiment. It is a schematic sectional drawing of the delay type photocurable resin coating apparatus which concerns on 1st Embodiment. It is a schematic block diagram of the delay type photocurable resin coating apparatus which concerns on 2nd Embodiment. It is a principal part enlarged view of the ultraviolet irradiation device of the delay type photocurable resin coating apparatus which concerns on 2nd Embodiment. It is principal part sectional drawing of the ultraviolet irradiation device of the delay type photocurable resin coating apparatus which concerns on 2nd Embodiment. It is principal part sectional drawing of the ultraviolet irradiation device of the delay type photocurable resin coating apparatus which concerns on 3rd Embodiment. It is a schematic sectional drawing of the terminal part of the liquid crystal display panel which apply | coated delay type photocurable resin using the delay type photocurable resin coating device and coating method which concern on this invention. It is a schematic sectional drawing of the terminal part of the liquid crystal display panel which apply | coated the conventional ultraviolet curable resin.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Delay type photocurable resin coating apparatus 2 Dispenser apparatus 3 Light-receiving part 4 Discharge part 5 Ultraviolet irradiation apparatus 8 Delay type photocurable resin

Claims (3)

It has an ultraviolet irradiation device and a dispenser device.
The dispenser device, a transparent light receiving unit that irradiates the delayed photocurable resin with ultraviolet rays emitted from the ultraviolet irradiation device;
A delay type photocurable resin coating apparatus comprising: a discharge unit configured to discharge the delayed type photocurable resin after ultraviolet irradiation onto an object to be coated.   The delay type photocurable resin coating apparatus according to claim 1, wherein the ultraviolet irradiation device is provided in a ring shape around the light receiving portion. Using the delayed photocurable resin coating apparatus according to claim 1 or 2, the delayed photocurable resin is irradiated with ultraviolet rays inside the delayed photocurable resin coating apparatus, and then applied to an object to be coated. A delayed photocurable resin coating method, characterized by being applied by being discharged onto the surface.

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