JP2019142117A - Liquid hardening device, and apparatus for discharging liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To irradiate an irradiation area smaller than an irradiation area of one light source. SOLUTION: This is a liquid curing device 12 that irradiates an active energy ray that cures an active energy ray curing type liquid, and has rows 13A and 13B of a plurality of light sources 13 (13a to 13f) composed of an LED lamp or the like. It has a light-shielding filter member 14 which is arranged in front of the emission surface of the light source 13 and partially shields the light emitted from the light source 13, and the light-shielding filter member 14 is arranged so as to be movable in a predetermined direction. [Selection diagram] Fig. 3

Description

  The present invention relates to a liquid curing device and a device for discharging a liquid.

  As an apparatus for discharging a liquid, there is an apparatus for discharging an active energy ray-curable liquid.

  2. Description of the Related Art Conventionally, it is known that a plurality of ultraviolet light sources can be used to control irradiation intensity in units of light sources (Patent Document 1).

Japanese Patent No. 5095442

  However, the configuration disclosed in Patent Document 1 has a problem in that an irradiation area smaller than one light source cannot be controlled.

  The present invention has been made in view of the above problems, and an object thereof is to enable irradiation to an irradiation area smaller than a light source.

In order to solve the above problems, the liquid curing apparatus according to the present invention is:
A light source that emits an active energy ray that cures the liquid;
A light shielding filter member that is disposed in front of the light source and at least partially shields active energy rays from the light source;
The light shielding member is configured to be movable with respect to the light source.

  According to the present invention, it is possible to irradiate an irradiation area smaller than the light source.

It is front explanatory drawing of the printing apparatus as an apparatus which discharges the liquid which concerns on 1st Embodiment of this invention. It is a bottom surface explanatory view of a carriage part similarly. It is plane explanatory drawing by the side of the output surface of the liquid hardening apparatus which comprises the hardening means. It is a plane explanatory view used for operation explanation of this embodiment. It is a plane explanatory view used for operation explanation of this embodiment. It is plane | planar explanatory drawing by the side of the output surface of the liquid hardening | curing apparatus which concerns on 2nd Embodiment of this invention. It is plane | planar explanatory drawing by the side of the output surface of the liquid hardening | curing apparatus which concerns on 3rd Embodiment of this invention. It is explanatory drawing explaining the time change of the integrating | accumulating light quantity provided for the effect | action description of the embodiment. It is a plane explanatory view by the side of an outgoing surface of a liquid hardening device concerning a 4th embodiment of the present invention. It is plane | planar explanatory drawing by the side of the output surface of the liquid hardening | curing apparatus which concerns on 5th Embodiment of this invention. It is a plane explanatory view by the side of an outgoing surface of a liquid hardening device concerning a 6th embodiment of the present invention. It is front explanatory drawing of the printing apparatus as an apparatus which discharges the liquid which concerns on 7th Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory front view of a printing apparatus as an apparatus for ejecting liquid according to the embodiment, and FIG. 2 is an explanatory bottom view of a carriage portion.

  The printing apparatus 1 is a serial type printing apparatus, and includes a carriage 10 that is moved and scanned in a main scanning direction. The liquid ejection head (hereinafter referred to as a head) 11 serving as a liquid ejection unit that ejects liquid on the carriage 10. (11A to 11F) are mounted. The heads 11A to 11F discharge a liquid of a required color, and the head 11F discharges a clear ((transparent) liquid 16. Also, the head 10 is cured at one end in the main scanning direction as a liquid curing device according to the present invention. Means 12 is mounted.

  Then, while intermittently transporting the print medium 15 in the sub-scanning direction, the carriage 10 is moved and scanned in the main scanning direction, and the required liquid 16 is ejected from the head 11 to form an image on the print medium 15, and curing means The active energy rays are irradiated by 12 to cure the liquid, and a printed matter is obtained.

  Next, the liquid curing device constituting the curing means will be described with reference to FIG. FIG. 3 is an explanatory plan view of the exit surface side of the liquid curing device.

  The liquid curing device 12 is disposed in front of the light source 13 composed of rows 13A and 13B of a plurality of divided light sources 13a to 13f composed of LED lamps and the like, and the light exiting surface of the light source 13. And a light shielding filter member 14 for partially shielding the incident light.

  The light shielding filter member 14 is a rectangular member in the present embodiment, and is disposed so as to be movable in the arrow direction (here, the sub-scanning direction Y).

  Next, the effect | action of this embodiment is demonstrated with reference to FIG.4 and FIG.5. 4 and 5 are explanatory plan views for explaining the operation.

  In the present embodiment, the divided light source 13c has an irradiation area (emitted light area) straddling the heads 11A and 11B, for example. Therefore, for example, when the divided light source 13c is turned on, the ejection region by the head 11A and a part of the ejection region by the head 11B are irradiated. On the other hand, when the divided light source 13c is turned off, it becomes impossible to irradiate a part of the ejection region by the head 11A.

  Therefore, only the entire discharge area of the head 11A cannot be cured only by turning on / off the divided light source 13c.

  Therefore, as shown in FIG. 4, the light blocking filter member 14 is moved so that the divided light sources 13a to 13c are turned on (the lighting state is shown with surface coating), and divided from the boundary of the head of the divided light source 13c. The light source 13d side is shielded, and the divided light sources 13d to 13f are turned off.

  Thereby, a hardening area | region and a non-hardening area | region can be correctly divided at the boundary of a head. Therefore, the entire ejection region of the heads 11A, 11C, and 11E can be cured.

  Further, as shown in FIG. 5, the end of the lighting region can be arranged at an arbitrary position of the head 11F that discharges the clear liquid, and the matte tone region m and the glossy tone region g are separated by one head 11F. Will be able to.

  As described above, by providing the light shielding filter member, it is possible to irradiate an irradiation region smaller than the irradiation region of the light source (here, one divided light source).

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 6 is an explanatory plan view of the exit surface side of the liquid curing apparatus according to the embodiment.

  In the present embodiment, a slit-shaped metal halide lamp is used as the light source 13.

  Even in this case, it is possible to partially shield the light by changing the position of the light shielding filter member 14.

  Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 7 is an explanatory plan view of the exit surface side of the liquid curing apparatus according to the embodiment.

  In the present embodiment, the side in the direction intersecting the moving direction of the light shielding filter member 14 is formed obliquely, and the width of the light shielding filter member 14 is not constant. In this case, the light shielding filter member 14 crosses the rows 13A and 13B of the light source 13 obliquely.

  The operation of this embodiment will be described with reference to FIG. FIG. 8 is an explanatory diagram for explaining the change over time of the integrated light amount for the same explanation.

  In the case of the first embodiment described above, as shown in FIG. 8A, the integrated light amount given to the print medium 15 when the carriage 10 moves in the main scanning direction changes stepwise with respect to the time change. When the amount of change increases.

  On the other hand, in the present embodiment, at the boundary between the light source 13 and the light shielding filter member 14, the accumulated light amount given to the print medium 15 when the carriage 10 moves in the main scanning direction is not covered with the light shielding filter member 14. Smaller than the surface. As a result, as shown in FIG. 8B, the amount of change in the integrated light amount becomes small with respect to the time change, and can be changed gently.

  Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 9 is an explanatory plan view of the exit surface side of the liquid curing apparatus according to the embodiment.

  In the present embodiment, a part or all of the light shielding filter member 14 is a light shielding filter member 14A that shields a specific active energy ray, for example, ultraviolet rays.

  As a result, the light intensity of the ultraviolet light can be changed at the portion of the light shielding filter member 14 that shields the ultraviolet light, and the integrated light quantity can be gently changed with respect to the time change.

  Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 10 is an explanatory plan view of the exit surface side of the liquid curing apparatus according to the embodiment.

  In the present embodiment, the light shielding filter member 14 is a part or the whole of a mesh-shaped ultraviolet light shielding filter member 14B.

  Thereby, the light intensity of the ultraviolet light in the region covered with the ultraviolet light shielding filter member 14B can be changed, and the integrated light quantity can be changed gently with respect to the time change.

  Next, a sixth embodiment of the present invention will be described with reference to FIG. FIG. 11 is an explanatory plan view of the exit surface side of the liquid curing apparatus according to the embodiment.

  In the present embodiment, the light shielding filter member 14 is partially or entirely made of an ultraviolet light shielding filter member 14C having a slit shape.

  Thereby, the light intensity of the ultraviolet light in the region covered with the ultraviolet light shielding filter member 14C can be changed, and the integrated light quantity can be changed gently with respect to the time change.

  A seventh embodiment of the present invention will be described with reference to FIG. FIG. 12 is an explanatory front view of a printing apparatus as an apparatus for ejecting liquid according to the embodiment.

  The printing apparatus 1 of the present embodiment is a line type printing apparatus, and includes a line type head array 21 in which a plurality of heads 11 (11A to 11F) that discharge liquid to a base member 20 are arranged.

  A curing unit 12 is mounted as a liquid curing apparatus according to the present invention on the downstream side of the head array 21 in the medium feeding direction. Here, the light-shielding filter member 14 of the curing means 12 is disposed so as to be movable in the X direction, which is the direction in which the heads 11 are arranged (the direction orthogonal to the feed direction).

  As the curing means 12, the liquid curing apparatus described in the above embodiments can be applied.

  The liquid is not limited to the active energy ray curable liquid, and the active energy ray curable liquid is not limited to the ultraviolet curable liquid but may be an electron beam (EB) curable liquid.

DESCRIPTION OF SYMBOLS 10 Carriage 11, 11A-11F Liquid discharge head 12 Curing means (liquid curing device)
13, 13a-13f Light source 14, 14A-14C Shading filter member

Claims (7)

A light source that emits an active energy ray that cures the liquid;
A light shielding filter member that is disposed in front of the light source and at least partially shields active energy rays from the light source;
The liquid curing device, wherein the light shielding filter member is arranged to be movable with respect to the light source. The liquid curing device according to claim 1, wherein the light shielding filter member has a constant width. The liquid curing device according to claim 1, wherein the light shielding filter member has a mesh shape. The liquid curing apparatus according to claim 1, wherein the light shielding filter member has a slit shape. The liquid curing apparatus according to claim 1, wherein the light source includes a plurality of divided light sources. Liquid ejection means for ejecting liquid;
An apparatus for ejecting liquid, comprising: the liquid curing apparatus according to claim 1. The apparatus for ejecting liquid according to claim 6, wherein the liquid ejecting unit and the liquid curing apparatus are mounted on a carriage that is moved and scanned.

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