JP2006068653A - Black light for decorative part production - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a black light for decorative part production uniformly irradiating a resin film at a part surface with ultraviolet rays, and miniaturizing the black light. <P>SOLUTION: This black light 11 is provided with an irradiation box 12, UV lamps 13 disposed within the box 12, a carrying conveyer 14 carrying a work W for passing through the irradiation box 12, hydraulic cylinders 18 for changing irradiation angles of the UV lamps 13, and a control device 15 generally controlling the whole device. The control device 15 makes the work W pass through the irradiation box 12 two or more times by reversing the carrying direction of the conveyer 14, and changes the irradiation angles of the UV lamps 13 by driving the hydraulic cylinders 18, every time when the work W passes through the irradiation box 12. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ultraviolet irradiation apparatus for producing a decorative part that irradiates the surface of the part with ultraviolet rays to add decoration.

  Conventionally, an ultraviolet irradiation device is used in a process of adding decoration to the surface of a resin part or the like, a process of manufacturing a semiconductor part, or the like (see, for example, Patent Documents 1 and 2).

Specifically, in the ultraviolet irradiation device of Patent Document 1, the workpiece surface is decorated by irradiating the workpiece surface with ultraviolet rays while the workpiece is conveyed in a certain direction by a conveyor and curing the UV paint on the surface. Added. Moreover, in the ultraviolet irradiation device of Patent Document 2, curing is performed by irradiating the substrate surface with ultraviolet rays while the substrate is being transported in a certain direction by a transport mechanism.
JP 2003-285911 A JP 2003-300618 A

  By the way, in the ultraviolet irradiation device for curing the UV paint, a larger amount of irradiation is required as compared with the case of irradiating the semiconductor substrate or the like with ultraviolet rays. In particular, when UV coating is applied to large parts such as building materials, furniture, and office supplies, a plurality of UV lamps are required to irradiate the surface of the parts with the necessary irradiation amount (for example, several thousand millijoules). In addition, it is necessary to ensure a long irradiation zone. As a result, the enlargement of the ultraviolet irradiation device and the increase in installation space become problems. In addition, when there is unevenness on the surface of the workpiece, the intensity of ultraviolet irradiation becomes non-uniform depending on the site, and thus a device for the irradiation mechanism for uniformly irradiating the ultraviolet light is required. Furthermore, when irradiating with a large irradiation amount, it is necessary to use a plurality of high-power UV lamps, and as a result, the amount of heat generation increases, so the temperature of the surface of the component tends to increase when passing through the irradiation zone. . Therefore, when a resin part having inferior heat resistance is used as a workpiece, the resin part may be thermally deformed, and some device is required to prevent this.

  The present invention has been made in view of the above-mentioned problems, and its purpose is for producing decorative parts that can uniformly irradiate the resin film on the surface of the part with ultraviolet rays and can reduce the size of the apparatus. It is providing the ultraviolet irradiation device of.

  In order to solve the above-mentioned problem, in the invention described in claim 1, decoration is added to the component by irradiating the component passing through the irradiation zone with ultraviolet rays and photopolymerizing the resin film on the component surface. An ultraviolet irradiation device for producing a decorative component, wherein the light source is disposed in the irradiation zone and generates ultraviolet light, a light source driving means for moving the light source, and the component is transported in the irradiation zone. Each time the component passes through the irradiation zone by reversing the conveying direction of the conveying unit and the component passes through the irradiation zone. The gist of the present invention is an ultraviolet irradiation device for producing decorative parts, wherein the light source is moved by a driving means.

  According to the first aspect of the present invention, since the necessary irradiation amount is ensured by passing the parts through the irradiation zone a plurality of times, the length of the irradiation zone can be suppressed and the apparatus can be miniaturized. be able to. Further, each time the part passes through the irradiation zone, the light source is moved, so that the ultraviolet irradiation state is appropriately changed, and as a result, the ultraviolet irradiation amount to the resin film can be made uniform.

  The resin film on the component surface in the present invention may be formed by applying a photocurable resin paint, or may be formed by printing a photocurable resin film. In addition, as the photocurable resin paint or resin film, for example, a resin material such as an acrylic resin or an epoxy resin is used. Moreover, as a light source, a mercury lamp, a metal halide lamp, etc. are suitable, for example.

  The gist of a second aspect of the present invention is that, in the first aspect, after the part passes through the irradiation zone and reaches the outside of the irradiation zone, the conveying direction of the part is reversed. According to the second aspect of the present invention, since the part reaches the outside of the irradiation zone and is once cooled by contact with the outside air, it is possible to prevent thermal deformation of the part having poor heat resistance such as a resin part. it can.

  The gist of the invention described in claim 3 is that it comprises a cooling means for cooling the inside of the irradiation zone in claim 1 or 2. According to the invention described in claim 3, since the inside of the irradiation zone is cooled by the cooling means, the temperature rise in the irradiation zone can be suppressed, and the thermal deformation of the components can be surely prevented.

  As detailed above, according to the first to third aspects of the present invention, it is possible to uniformly irradiate the resin film on the surface of the component with ultraviolet rays and to reduce the size of the device. An ultraviolet irradiation device can be provided. Further, according to the second and third aspects of the present invention, even when a resin component having inferior heat resistance is used as a workpiece, it is possible to add decoration to the surface without causing thermal deformation.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a schematic configuration of an ultraviolet irradiation device 11 in the present embodiment. 1A is a cross-sectional view seen from the upper surface of the ultraviolet irradiation device 11, FIG. 1B is a cross-sectional view seen from the side, and FIG. 1C is a cross-sectional view seen from the front. is there.

  The ultraviolet irradiation device 11 is incorporated in a production line for manufacturing a large resin part W, and the resin film applied on the surface of the part in the previous process is photopolymerized by irradiation with ultraviolet rays to decorate the resin part W. It is an apparatus for manufacturing decorative parts to be added. In addition, the resin component W of this embodiment is a resin building material, and the size is about 2000 mm in length, 300 mm in width, and about 20 mm to 100 mm in height.

  The ultraviolet irradiation device 11 is used for conveying an irradiation box 12 (irradiation zone) that is a portion that irradiates ultraviolet rays, a plurality of UV lamps 13 (light sources) provided in the irradiation box 12, and a resin component (workpiece) W. A transport conveyor 14, a control device 15 for comprehensively controlling the entire apparatus, a jig carriage 17 and the like are provided.

  In the present embodiment, a conveying means is configured by the jig carriage 17 on which the workpiece W is placed and the conveyance conveyor 14 that reciprocates the jig carriage 17. The irradiation box 12 is provided so as to surround the transport path of the transport conveyor 14. The size of the irradiation box 12 is about 3000 mm in length, 1800 mm in width, and 2500 mm in height.

  As shown in FIG. 1 (c), the jig cart 17 of the present embodiment includes a cart portion 17a arranged so as to be able to run on a drive rail (not shown), and a vertical direction from the center of the upper surface of the cart portion 17a. It consists of the support | pillar 17b extended and the mounting part 17c attached to the upper end of the support | pillar 17b. For example, the jig carriage 17 travels along the drive rail by pulling the carriage portion 17a with a pulling member (such as a wire or a chain) (not shown). In addition, the structure which the jig trolley 17 self-propels is sufficient. Moreover, in this embodiment, the two workpiece | work W is mounted on the upper surface of the mounting part 17c of the jig trolley | bogie 17, and the jig trolley | bogie 17 is conveyed by the conveyance conveyor 14 in two directions. . The workpiece W is a resin molded product formed into a plate shape. On one side surface (upper surface) of the workpiece W, a UV coating is applied by a coating process to form a resin film. As this UV paint, a photo-curing paint made from an acrylic resin is used.

  A UV lamp 13 is disposed in the irradiation box 12 at a position corresponding to each workpiece W to be transported, and ultraviolet rays generated by each UV lamp 13 are irradiated onto the resin film on the workpiece surface. More specifically, in the irradiation box 12, four UV lamps 13 are disposed at the upper part, and two UV lamps 13 are disposed at the lower part. These UV lamps 13 are arranged so as to be orthogonal to the conveyance direction of the workpiece W (longitudinal direction of the irradiation box 12). The upper two UV lamps 13 are arranged in series on the carry-in port 12a side of the irradiation box 12, and the remaining two are arranged in series on the carry-out port 12b side. These upper UV lamps 13 irradiate the upper surface of the workpiece W with ultraviolet rays.

  Further, the two lower UV lamps 13 are arranged in series at the approximate center in the longitudinal direction of the irradiation box 12, and each UV lamp 13 irradiates the lower surface of the workpiece W with ultraviolet rays. Note that the end of the workpiece W protrudes from the upper surface of the jig carriage 17 in a state where the workpiece W is placed on the placement portion 17c, and the UV paint attached to the outer peripheral portion on the lower surface side of the workpiece W in the painting process is seen from below. It is hardened by the irradiation of ultraviolet rays.

  Further, two UV lamps 13 are provided on each side surface in the irradiation box 12. These UV lamps 13 are installed in parallel to the transport direction of the workpiece W (longitudinal direction of the irradiation box 12), and irradiate the side surface of the workpiece W with ultraviolet rays.

  As the UV lamp 13, as shown in FIG. 3A, a parallel light type lamp including a light emitting portion 13 a and an aluminum mirror 13 a (reflecting mirror) having a concave reflecting surface is used. As shown in FIG. 3B, a UV lamp having cooling means such as a water cooling jacket 13c may be employed. In the latter case, even when a high-power UV lamp 13 is used, the amount of heat generated can be kept small, so the temperature rise in the irradiation box 12 is small.

  In this embodiment, the UV lamp 13 provided on the upper part of the irradiation box 12 is supported at both ends by a fluid pressure cylinder 18 (light source driving means). The irradiation angle of the UV lamp 13 and the position of the UV lamp 13 are changed by moving the piston rod 18a of the fluid pressure cylinder 18 up and down. The movement of the piston rod 18a is controlled based on a command signal from the control device 15. An air cylinder or a hydraulic cylinder can be used as the fluid pressure cylinder 18. An electric cylinder may be used instead of the fluid pressure cylinder 18.

  The control device 15 is configured by a known computer including a CPU, a ROM, a RAM, an input / output port, and the like. This control device 15 is electrically connected to the UV lamp 13, the transfer conveyor 14, and the solenoid valve (not shown) of the fluid pressure cylinder 18, and controls the on / off of the UV lamp 13 and the transfer control of the transfer conveyor 14. The drive control of the fluid pressure cylinder 18 is performed.

  In this embodiment, the control device 15 reverses the conveyance direction of the workpiece W and controls the conveyance conveyor 14 so that the workpiece W passes (passes) the irradiation box 12 three times. Thus, the irradiation amount required in order to harden the UV coating material (resin film) of the workpiece | work surface is ensured because the workpiece | work W passes the inside of the irradiation box 12 in multiple times. The irradiation amount of ultraviolet rays is determined by the product of the intensity of ultraviolet rays and the irradiation time.

  The UV lamp 13 as a light source generates heat when generating ultraviolet rays. For this reason, the inside of the irradiation box 12 is warmed by the irradiation of ultraviolet rays, and thermal stress is applied to the workpiece W passing through the inside of the irradiation box 12. Therefore, in the present embodiment, after the work W passes through the irradiation box 12 and reaches the outside of the box 12, the work W is changed in the conveyance direction so that the work W is brought into contact with the air outside the box to be cooled once. Like to do. In this embodiment, since the workpiece W is a resin product having poor heat resistance, the cooling time outside the irradiation box 12 is secured so that the surface temperature does not exceed about 90 ° C.

  Further, the control device 15 changes the irradiation angle of the UV lamp 13 by driving and controlling the fluid pressure cylinder 18 every time the workpiece W passes through the irradiation box 12. Since the upper surface (painted surface) of the workpiece W of the present embodiment has irregularities, the amount of ultraviolet irradiation on the upper surface of the workpiece W becomes uniform by changing the irradiation angle of the UV lamp 13.

  FIG. 2A illustrates a mode in which the irradiation angle of the UV lamp 13 is changed. When the workpiece W first passes through the irradiation box 12 (first pass passing from the carry-in port 12a side to the carry-out port 12b side), the control device 15 only has one fluid pressure cylinder 18 holding the UV lamp 13. The UV lamp 13 is tilted so that the left end is lower than the right end. Further, when passing from the carry-out port 12b side to the carry-in port 12a side (second pass), the control device 15 contracts the expanding fluid pressure cylinder 18 and expands the contracted fluid pressure cylinder 18a. The UV lamp 13 is tilted so that the left end is higher than the right end. Further, when passing again from the carry-in port 12a side to the carry-out port 12b side (third pass), the control device 15 brings all the fluid pressure cylinders 18 into the contracted state and puts the UV lamps 13 into the horizontal state. In addition, you may make the aspect which changes an irradiation angle like FIG.2 (b).

  Thus, the resin film on the workpiece surface is surely photopolymerized and cured by passing through the irradiation box 12 a plurality of times. The workpiece W is carried out of the ultraviolet irradiation device 11 by the conveyor 14 as a finished product with decoration.

  Therefore, according to the present embodiment, the following effects can be obtained.

  (1) Since the workpiece | work W passes the inside of the irradiation box 12 as an irradiation zone in multiple times, the irradiation amount required in order to photopolymerize the resin film of the surface of the workpiece | work W is securable. Further, each time the workpiece W passes through the irradiation box 12, the irradiation angle of the UV lamp 13 is changed by the fluid pressure cylinder 18 as the light source driving means. That is, as a result of appropriately changing the irradiation state of ultraviolet rays, the ultraviolet irradiation amount to the resin film can be made uniform. Therefore, the length of the irradiation box 12 (irradiation zone) can be suppressed as compared with the conventional ultraviolet irradiation apparatus that passes the workpiece W through the irradiation zone only once, and the entire apparatus can be downsized. Further, along with this, the number of UV lamps 13 can be reduced, and it is easy to achieve reduction in equipment cost. Furthermore, the driving means for changing the irradiation angle of the UV lamp 13 can have a relatively simple configuration.

  (2) In this embodiment, the conveyance direction is reversed after the workpiece W reaches outside the irradiation box 12. Therefore, the workpiece W warmed in the irradiation box 12 can be cooled with air outside the box, and thermal deformation of the workpiece W can be prevented.

  (3) On / off control of the UV lamp 13, transport control of the transport conveyor 14, and drive control of the fluid pressure cylinder 18 are performed by the control device 15. Therefore, the control device 15 can change the irradiation angle of the UV lamp 13 at an appropriate timing according to the transfer position of the workpiece W on the transfer conveyor 14. Further, the UV lamp 13 can be appropriately turned on according to the transfer position of the workpiece W.

  In addition, you may change embodiment of this invention as follows.

  In the above embodiment, the transport direction is changed after the workpiece W reaches the outside of the irradiation box 12, but the present invention is not limited to this. For example, when the work W does not undergo thermal deformation, such as when heat generation due to ultraviolet irradiation is small, or when the work W is made of a metal material such as a heat-resistant resin material or an iron plate, the work W reaches the outside of the irradiation box 12. Before carrying out, the conveyance direction of the workpiece W may be changed in the irradiation box 12.

  In the above embodiment, the work W passes through the irradiation box 12 three times by switching the transport direction of the transport conveyor 14. However, the work W is changed so as to pass twice or four or more times. May be. In addition, when letting the workpiece | work W pass even number of times, the carrying-in entrance and carrying-out exit of the irradiation box 12 become common.

  As shown in FIG. 5, a driving mechanism (for example, a fluid pressure cylinder 41) for changing the tilt angle of the workpiece W may be provided in the jig carriage 17. In FIG. 5, the fluid pressure cylinder 41 has a proximal end fixed to the connecting portion 17b and a distal end fixed to the mounting portion 17c. The distal end of the connecting portion 17b is pivotally supported so as to be rotatable with respect to the central portion of the placement portion 17c. Therefore, the inclination angle of the mounting portion 17 c is changed by the expansion and contraction operation of the fluid pressure cylinder 41. And even if it is such a structure, the ultraviolet irradiation amount with respect to a resin film can be made uniform.

  Only the UV lamp 13 provided at the upper part of the irradiation box 12 has a configuration capable of changing the irradiation angle by driving the fluid pressure cylinder 18, but the UV lamp 13 provided at the lower part or the side surface may be configured to change the irradiation angle. Good. In this case, the UV irradiation amount can be ensured uniformly on the side surface and the lower surface of the workpiece W, and the UV paint applied to the side surface and the lower surface can be appropriately cured.

  As in another embodiment shown in FIG. 4, for example, a cooling fan 51 (cooling unit) that cools the irradiation box 12 by supplying external wind may be provided. According to this configuration, the temperature rise in the irradiation box 12 can be suppressed, and thermal deformation of the workpiece W can be reliably prevented.

  In the above embodiment, the on / off control of the UV lamp 13, the transport control of the transport conveyor 14, and the drive control of the cylinder 18 are controlled by one control device 15, but each control is performed by a separate control device. You may comprise as follows.

  The ultraviolet irradiation device 11 may be used as a device for adding decoration to resin components for vehicles, such as a meter panel, in addition to the building materials exemplified in the above embodiment.

  Next, in addition to the technical ideas described in the claims, the technical ideas grasped by the embodiment described above are listed below.

  (1) An ultraviolet irradiation device for producing a decorative part that applies decoration to the part by irradiating the part passing through the irradiation zone with ultraviolet light and photopolymerizing a resin film on the surface of the part, A light source that emits ultraviolet light and is disposed in the irradiation zone; and a transport unit that transports the component and passes through the irradiation zone. The transport direction of the transport unit is reversed so that the component is in the irradiation zone. And the inclination angle of the component is changed every time the component passes through the irradiation zone.

  (2) The ultraviolet light irradiation device for producing a decorative part according to claim 1, wherein the light source driving means changes an irradiation angle of the ultraviolet light on the surface of the part.

  (3) The ultraviolet irradiation apparatus for manufacturing a decorative part according to claim 1, wherein the resin film on the surface of the part is formed by applying a paint made of a photo-curing acrylic curable resin.

  (4) The ultraviolet irradiation apparatus for producing a decorative part according to claim 1, wherein the resin film on the surface of the part is formed by printing a photocurable acrylic film.

(A)-(c) is sectional drawing which shows schematic structure of the ultraviolet irradiation device in one Embodiment. (A), (b) is explanatory drawing for demonstrating the aspect which changes the irradiation angle of UV lamp. (A), (b) is the schematic for demonstrating the structure of UV lamp. Sectional drawing which shows schematic structure of the ultraviolet irradiation apparatus in another embodiment. Sectional drawing which shows schematic structure of the ultraviolet irradiation apparatus in another embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Ultraviolet irradiation apparatus 12 ... Irradiation box as an irradiation zone 13 ... UV lamp as a light source 13b ... Water cooling jacket as a cooling means 14 ... Conveyor which comprises a conveyance means 17 ... Jig cart which comprises a conveyance means 18 ... Light source Fluid pressure cylinder as drive means 51 ... Cooling fan as cooling means W ... Work as part

Claims (3)

An ultraviolet irradiation device for producing a decorative component that applies decoration to the component by irradiating the component passing through the irradiation zone with ultraviolet rays and photopolymerizing a resin film on the component surface,
A light source disposed within the irradiation zone and generating ultraviolet light;
Light source driving means for moving the light source;
Transporting means for transporting the parts and passing through the irradiation zone;
The conveying direction of the conveying means is reversed so that the part passes through the irradiation zone more than once, and the light source driving means moves the light source each time the part passes through the irradiation zone. An ultraviolet irradiation device for producing decorative parts, characterized in that   The ultraviolet irradiation apparatus for manufacturing a decorative part according to claim 1, wherein the part is conveyed in a reverse direction after passing through the irradiation zone and reaching the outside of the irradiation zone. The ultraviolet irradiation device for producing a decorative part according to claim 1, further comprising a cooling unit that cools the inside of the irradiation zone.

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