Resin application device and method for molding ultraviolet curable resin

Abstract

To provide a resin coating apparatus capable of easily molding the cross-sectional shape of an ultraviolet curable resin, and a method for molding the ultraviolet curable resin using the resin coating apparatus.SOLUTION: A resin applicator according to the present disclosure includes a resin supplier configured to supply an ultraviolet curable resin, a transfer roller configured to apply the ultraviolet curable resin supplied from the resin supplier to a workpiece, and an ultraviolet irradiation source configured to irradiate the ultraviolet curable resin applied to the workpiece with ultraviolet light, the ultraviolet light emitted from the ultraviolet irradiation source being transmitted through the transfer roller and irradiated to the ultraviolet curable resin applied to the workpiece by the transfer roller. With this configuration, it is possible to provide a resin application device capable of easily forming the cross-sectional shape of the ultraviolet curable resin.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a resin application device and a method for molding ultraviolet curable resin. [Background technology]

[0002] Patent document 1 discloses a resin application device that applies ultraviolet curing resin to the transfer surfaces of a pair of transfer rings, irradiates ultraviolet light through the transfer rings at the position where the transfer rings and the object to be transferred come into contact, and hardens the ultraviolet curing resin. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-004697 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the resin application device disclosed in Patent Document 1, when a transfer body (molded body) is sandwiched between a pair of transfer rings (transfer rollers) to transfer ultraviolet curable resin, there was a problem in that the cross-sectional shape of the cured ultraviolet curable resin could not be formed.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and provides a resin application device that can easily form the cross-sectional shape of ultraviolet curable resin, and a method for forming ultraviolet curable resin using the resin application device. [Means for solving the problem]

[0006] A resin application device according to one aspect of the present disclosure includes: a resin supply unit that supplies ultraviolet curable resin; a transfer roller that applies the ultraviolet curable resin supplied from the resin supply unit to a workpiece; an ultraviolet irradiation source that irradiates ultraviolet rays onto the ultraviolet curing resin applied to the workpiece, A resin application device, wherein ultraviolet light emitted from the ultraviolet light irradiation source passes through the transfer roller and is irradiated onto the ultraviolet curing resin applied to the workpiece by the transfer roller, The transfer surface of the transfer roller is formed with projections and recesses for imparting a predetermined surface shape to the ultraviolet curable resin.

[0007] A method for molding an ultraviolet curable resin according to one embodiment of the present disclosure includes: supplying ultraviolet curable resin to the transfer surface of the transfer roller; a step in which the transfer roller applies the ultraviolet curable resin to a workpiece; A step in which an ultraviolet irradiation source irradiates ultraviolet light onto the ultraviolet curing resin applied to the workpiece, A molding method for ultraviolet curable resin, in which ultraviolet light emitted from the ultraviolet irradiation source passes through the transfer roller and is irradiated onto the ultraviolet curable resin applied to the workpiece by the transfer roller, The transfer surface of the transfer roller is formed with projections and recesses for imparting a predetermined surface shape to the ultraviolet curable resin. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to provide a resin application device that can easily form the cross-sectional shape of ultraviolet curable resin, and a method for forming ultraviolet curable resin using the resin application device. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic perspective view of a resin application device according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a top view of the resin application apparatus according to the embodiment of the present disclosure. [Figure 3] 1 is a flowchart illustrating a method for molding an ultraviolet curable resin according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, specific embodiments of the present disclosure will be described in detail with reference to the drawings. However, the present disclosure is not limited to the following embodiments. In addition, the following description and drawings have been simplified appropriately for clarity of explanation.

[0011] <Configuration of Resin Coating Device> Fig. 1 is a schematic perspective view of a resin application apparatus according to an embodiment of the present disclosure, and Fig. 2 is a top view of the resin application apparatus according to an embodiment of the present disclosure. The right-handed xyz Cartesian coordinate system shown in Figures 1 and 2 is for the sake of convenience in showing the positional relationships of the components. In Figures 1 and 2, the positive z-axis direction is vertically upward, and the xy plane is the horizontal plane, which is common to all the figures.

[0012] The resin application device D1 includes a pump 11, a nozzle 12, a transfer roller 21, a first UVLED (Ultra Violet Light Emitting Diode) 31, a second UVLED 32, a roller unit 41, and a transport unit 51. In the resin application device D1 shown in FIGS. 1 and 2, the pump 11 and the nozzle 12 collectively constitute a resin supply unit, and the first UVLED 31 and the second UVLED 32 collectively constitute an ultraviolet irradiation source. The workpiece W is coated with ultraviolet curable resin from the transfer roller 21 and transported by the transport unit 51. In FIGS. 1 and 2, the transport direction of the workpiece W is the negative x-axis direction.

[0013] The pump 11 supplies the UV-curable resin to the transfer roller 21 via the nozzle 12. The pump 11 may be, for example, a mono pump, a plunger pump, or a screw pump, but is not particularly limited thereto. The resin supply speed of the pump 11 is not particularly limited and may be set appropriately depending on the size and conveyance speed of the workpiece W, the rotation speed of the transfer roller 21, etc. In FIGS. 1 and 2, the pump 11 is disposed on the roller unit 41, but it may also be disposed independently of the roller unit 41.

[0014] The nozzle 12 discharges the UV-curable resin supplied from the pump 11 onto the transfer roller 21. The nozzle 12 is connected to the pump 11. The nozzle 12 shown in FIG. 1 extends linearly in the negative x-axis direction from the pump 11 toward the transfer roller 21, and discharges the UV-curable resin onto the transfer roller 21. The material and shape of the nozzle 12 are not particularly limited, but it is preferable that the nozzle 12 be made of a light-blocking material to prevent the UV-curable resin in the nozzle 12 from being hardened by natural light. In FIGS. 1 and 2, the nozzle 12 is disposed on the roller unit 41, but it may be disposed independently from the roller unit 41.

[0015] The transfer roller 21 applies the ultraviolet curing resin supplied from the pump 11 via the nozzle 12 to the side surface of the workpiece W on the negative y-axis side. The transfer roller 21 is disposed on a roller unit 41. In FIGS. 1 and 2, the transfer roller 21 is disposed in the negative x-axis direction relative to the nozzle 12 and in the positive y-axis direction relative to the first UVLED 31.

[0016] Furthermore, the transfer roller 21 rotates around the z-axis as the rotation axis in accordance with the transport of the workpiece W. For example, as shown by the outline arrow in Figure 2, the transfer roller 21, which is arranged on the y-axis negative side relative to the workpiece W being transported in the x-axis negative direction, rotates counterclockwise as viewed from above in the vertical direction. As the transfer roller 21 rotates, the ultraviolet curable resin ejected onto the transfer roller 21 is applied to the workpiece W.

[0017] Furthermore, the transfer roller 21 is UV-transparent and transmits UV rays emitted from the first UVLED 31. The material of the transfer roller 21 is, for example, glass such as quartz glass, or transparent resin such as fluororesin or acrylic resin. From the viewpoint of durability, the material of the transfer roller 21 is preferably quartz glass, but is not particularly limited as long as it is UV-transparent. The UV-transparent property of the transfer roller 21 allows the UV-curable resin applied to the workpiece W to be quickly cured.

[0018] Furthermore, the transfer roller 21 has an uneven portion formed on the transfer surface. The uneven portion formed on the transfer surface imparts a predetermined surface shape to the ultraviolet curing resin to be applied to the workpiece W. Examples of the shape of the uneven portion include a convex portion for forming a slit in the center of the ultraviolet curing resin in the width direction, and an R-shape for forming an R-shape at both ends of the ultraviolet curing resin in the width direction, but the shape of the uneven portion is not limited to these. The shape of the uneven portion may be determined appropriately depending on the surface shape that is desired to be imparted to the ultraviolet curing resin.

[0019] Since the transfer roller 21 is UV-transparent and has an uneven surface formed on the transfer surface, the UV-curable resin applied to the workpiece W is molded into a predetermined surface shape that corresponds to the shape of the uneven surface and then hardens.

[0020] The first UVLED 31 is, for example, a first ultraviolet irradiation source, and emits ultraviolet rays for curing the ultraviolet curing resin applied to the workpiece W. The ultraviolet rays emitted from the first UVLED 31 pass through the transfer roller 21 and are irradiated onto the ultraviolet curing resin applied to the workpiece W. In FIG. 2, the first UVLED 31 is disposed opposite the workpiece W via the transfer roller 21. Here, as indicated by the black arrow, the ultraviolet rays emitted from the first UVLED 31 in the positive direction of the y-axis pass through the transfer roller 21 and are irradiated onto the ultraviolet curing resin applied to the workpiece W.

[0021] 1 and 2, the first UVLED 31 is disposed on the roller unit 41, but it may be disposed independently of the roller unit 41. The wavelength and intensity of the ultraviolet light emitted by the first UVLED 31 are not particularly limited. A plurality of first UVLEDs 31 may be provided in the resin coating device D1.

[0022] The second UVLED 32 is, for example, a second ultraviolet irradiation source, and emits ultraviolet rays for curing the ultraviolet curing resin applied to the workpiece W. In FIG. 2, the second UVLED 32 is disposed opposite the workpiece W on the negative x-axis side of the transfer roller 21 so that it can irradiate the workpiece W with ultraviolet rays after ultraviolet irradiation by the first UVLED 31. Here, as indicated by the black arrow, ultraviolet rays emitted from the second UVLED 32 in the positive y-axis direction are directly irradiated onto the ultraviolet curing resin applied to the workpiece W. Although the second UV LED 32 is disposed on the roller unit 41 in FIGS. 1 and 2, it may be disposed independently of the roller unit 41.

[0023] 1 and 2, a predetermined surface shape is formed in the ultraviolet curable resin applied to the workpiece W by ultraviolet irradiation from the first UVLED 31 and the transfer roller 21. Furthermore, the ultraviolet curable resin applied to the workpiece W is fully cured by ultraviolet irradiation from the second UVLED 32.

[0024] However, if the ultraviolet curing resin applied to the workpiece W can be completely cured by the ultraviolet radiation from the first UVLED 31, the second UVLED 32 may not be provided. On the other hand, the resin application device D1 may be provided with a plurality of second UVLEDs 32. Furthermore, the wavelength and intensity of the ultraviolet radiation emitted by the second UVLED 32 are not particularly limited.

[0025] The roller unit 41 can adjust the distance between the transfer roller 21 provided on the upper surface and the workpiece W. That is, in Figures 1 and 2, the roller unit 41 is movable in the y-axis direction. The transport unit 51 transports the workpiece W in a predetermined direction. In Fig. 2, as indicated by the outline arrow, the transport unit 51 transports the workpiece W in the negative direction of the x-axis.

[0026] The workpiece W is coated with ultraviolet curable resin by a transfer roller 21. The shape, size, material, etc. of the workpiece W are not particularly limited, but it is, for example, an electrode body used in a battery. In the example shown in Figures 1 and 2, the ultraviolet curable resin is coated on one of the side surfaces (surfaces parallel to the xz plane) of the plate-shaped workpiece W extending in the x-axis direction.

[0027] The workpiece W may already have an ultraviolet curable resin layer formed thereon. That is, the resin application device D1 may form a second ultraviolet curable resin layer on the workpiece W on which a first ultraviolet curable resin layer has been formed.

[0028] 1, the resin application device D1 includes only one pump 11, nozzle 12, transfer roller 21, first UVLED 31, second UVLED 32, and roller unit 41, but may include a pair of similar components facing each other perpendicular to the conveyance direction with the workpiece W in between. By including a pair of such components in the resin application device D1, ultraviolet-curable resin layers can be formed on both sides of the workpiece W simultaneously.

[0029] The UV-curable resin applied by the resin application device D1 is not particularly limited. For example, a radical polymerization UV-curable resin contains polyester acrylate, urethane acrylate, epoxy acrylate, polyfunctional acrylate monomer, monofunctional acrylate monomer, etc. as its main component, and acetophenone-based, benzophenone-based, and thioxanthone-based compounds as its photopolymerization initiator. Furthermore, a photocationic polymerization UV-curable resin contains alicyclic epoxy, glycidyl epoxy, cyclic ether compound, etc. as its main component, and sulfonium salt-based, iodonium salt-based compounds as its photopolymerization initiator. Additionally, these UV-curable resins may contain fillers, pigments, UV absorbers, etc. as additives.

[0030] As described above, the resin application device according to the embodiment of the present disclosure includes a transfer roller that is UV-transparent and has an uneven portion formed on the transfer surface, thereby providing a resin application device that can easily shape the cross-sectional shape of UV-curable resin.

[0031] <Ultraviolet curing resin molding method> Next, a method for molding ultraviolet curable resin according to an embodiment of the present disclosure will be described with reference to Fig. 3. Fig. 3 is a flowchart showing a method for molding ultraviolet curable resin according to an embodiment of the present disclosure.

[0032] First, ultraviolet curable resin is supplied from the pump 11 to the transfer surface of the transfer roller 21 via the nozzle 12 (step S1).

[0033] Next, the transfer roller 21 applies the ultraviolet curable resin supplied to the transfer surface to the workpiece W (step S2). In step S2, since the uneven portion is formed on the transfer surface, the ultraviolet curable resin applied to the workpiece W is formed into a predetermined surface shape corresponding to the shape of the uneven portion.

[0034] Next, the first UVLED 31 irradiates ultraviolet light onto the ultraviolet curable resin applied to the workpiece W (step S3). Here, in order to cure the ultraviolet curable resin while maintaining the predetermined surface shape formed in step S2, it is preferable that the interval between steps S2 and S3 be as short as possible. In particular, it is even more preferable to perform steps S2 and S3 simultaneously.

[0035] Finally, the second UVLED 32 irradiates the ultraviolet curable resin applied to the workpiece W with ultraviolet light (step S4). Note that if the ultraviolet curable resin applied to the workpiece W can be completely cured in step S3, step S4 does not need to be performed.

[0036] As described above, in the ultraviolet curable resin molding method according to the embodiment of the present disclosure, the ultraviolet curable resin is applied using a transfer roller having an uneven portion formed on the transfer surface, and ultraviolet light is irradiated simultaneously with the application of the ultraviolet curable resin. This configuration provides an ultraviolet curable resin molding method that can easily mold the cross-sectional shape of the ultraviolet curable resin. [Explanation of symbols]

[0037] D1 Resin application device double work 11 Pump 12 nozzles 21 Transfer roller 31 The first UV LED 32 Second UV LED 41 Roller unit 51 Transport unit

Claims

1. a resin supply unit that supplies ultraviolet curable resin; a transfer roller that applies the ultraviolet curable resin supplied from the resin supply unit to a workpiece; an ultraviolet irradiation source that irradiates ultraviolet rays onto the ultraviolet curing resin applied to the workpiece, A resin application device, wherein ultraviolet light emitted from the ultraviolet irradiation source passes through the transfer roller and is irradiated onto the ultraviolet curing resin applied to the workpiece by the transfer roller, The transfer surface of the transfer roller is formed with an uneven portion for imparting a predetermined surface shape to the ultraviolet curable resin. Resin application device.

2. The uneven portion includes a convex portion for forming a slit in a widthwise center portion of the ultraviolet curable resin, and an R-shape for forming an R-shape at both widthwise end portions of the ultraviolet curable resin. The resin application device according to claim 1 .

3. The transfer roller is made of quartz glass. The resin application device according to claim 1 or 2.

4. The ultraviolet radiation source is a first ultraviolet radiation source, The ultraviolet curing resin is applied to the workpiece by the transfer roller and is further irradiated with ultraviolet light by the ultraviolet irradiation source. The resin application device according to claim 1 or 2.

5. supplying ultraviolet curable resin to the transfer surface of the transfer roller; a step in which the transfer roller applies the ultraviolet curable resin to a workpiece; A step in which an ultraviolet irradiation source irradiates ultraviolet light onto the ultraviolet curing resin applied to the workpiece, A molding method for ultraviolet curable resin, in which ultraviolet light emitted from the ultraviolet irradiation source passes through the transfer roller and is irradiated onto the ultraviolet curable resin applied to the workpiece by the transfer roller, The transfer surface of the transfer roller is formed with an uneven portion for imparting a predetermined surface shape to the ultraviolet curable resin. A method for molding ultraviolet curing resin.

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