Inkjet head set and inkjet head frame

Abstract

The utility model relates to an ink jet head group and an ink jet head frame. According to the embodiment of the utility model, the ink jet head group comprises a first frame and a second frame, wherein the first frame comprises a lower surface extending along a first direction and a second direction; a second frame extending from an edge of the first frame in a third direction perpendicular to the lower surface to form a peripheral wall together with the first frame; and a third frame including a plurality of partition walls extending in the first direction and the third direction and formed across a first side wall of the peripheral wall and a second side wall facing the first side wall, the plurality of partition walls being arranged in the second direction, the first frame may include a first flow path formed inside the first side wall in a second direction and a second flow path formed inside the second side wall in the second direction, and the third frame may include a third flow path formed inside the partition wall.

Description

Technical Field

[0001] The utility model relates to an inkjet head group, an inkjet head frame and an inkjet head package including the inkjet head frame. Specifically, the utility model relates to an inkjet head group, an inkjet head frame and an inkjet head package capable of minimizing the influence of heat generated when discharging ink on a device or frame around the inkjet head. Background Art

[0002] Inkjet printers are widely used in semiconductor processes and in manufacturing processes of electronic devices such as displays. When ink is discharged from an inkjet head, the ink discharge portion may be heated to a high temperature to maintain the viscosity of the ink.

[0003] In addition, in semiconductor processes or display processes, as the size of individual components gradually decreases, the position of ink adhesion may need to be precisely controlled in the process using an inkjet printer. In order to prevent surrounding devices, circuits, frames, etc. from being affected by the heat generated when the ink discharge unit is heated, it is important to maintain a constant temperature around the inkjet head. Utility Model Content

[0004] Technical issues

[0005] The technical problem to be solved by the utility model is to provide an inkjet head group, an inkjet head frame and an inkjet head package which can minimize the influence of the device or frame around the inkjet head due to the heat generated when discharging ink in the process of using an inkjet printer.

[0006] The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art through the following description.

[0007] Technical Solution

[0008] According to an embodiment of the utility model, an inkjet head group may include: a first frame, including a lower surface extending along a first direction and a second direction; a second frame, extending from an edge of the first frame toward a third direction perpendicular to the lower surface and forming a peripheral wall together with the first frame; and a third frame, including a plurality of partition walls, the plurality of partition walls extending along the first direction and the third direction and crossing the first side wall of the peripheral wall in the first direction and formed between a second side wall opposite to the first side wall in the first direction, and the plurality of partition walls are arranged along the second direction, wherein the first frame may include a first flow path formed inside the first side wall along the second direction and a second flow path formed inside the second side wall along the second direction, and the third frame may include a plurality of third flow paths respectively formed inside the plurality of partition walls.

[0009] In an embodiment, the first flow path and the second flow path may be formed in a boundary area between the first frame and the second frame.

[0010] In an embodiment, each of the plurality of third flow paths may extend in a zigzag shape inside the corresponding partition wall.

[0011] In an embodiment, a width of the partition wall in the first direction may gradually become narrower toward the third direction.

[0012] In an embodiment, one end of the third flow path may be connected to the first flow path, and the other end of the third flow path may be connected to the second flow path.

[0013] According to the embodiment, the inkjet head group may further include: a fourth frame and a fifth frame, which protrude from two side surfaces of the first frame respectively, wherein a fourth flow path may be formed on a third side wall of the peripheral wall in the second direction and inside the fourth frame, and a fifth flow path may be formed on a fourth side wall of the peripheral wall opposite to the third side wall in the second direction and inside the fifth frame.

[0014] In an embodiment, the peripheral wall may include a plurality of heat dissipation fins extending along the third direction and protruding from an outer side surface in a vertical direction.

[0015] In an embodiment, one end of the fourth flow path can be connected to the cooling water suction port, the other end of the fourth flow path can be connected to the first flow path, one end of the fifth flow path can be connected to the cooling water discharge port, and the other end of the fifth flow path can be connected to the second flow path.

[0016] In an embodiment, the first frame, the second frame, the third frame, the fourth frame and the fifth frame are manufactured by a three-dimensional printing method selected from the group consisting of selective laser melting (SLM: Selective Laser Melting), selective laser sintering (SLS: Selective Laser Sintering) and stereolithography (SLA: Selective Lithography Apparatus).

[0017] In an embodiment, the inkjet head group may further include: a plurality of inkjet heads, respectively accommodated in a plurality of accommodating portions formed by the peripheral wall and the partition wall, wherein the accommodating portions may include an air gap formed between a side surface of each of the plurality of inkjet heads and the partition wall.

[0018] In an embodiment, the lower surface may include a fastening portion combined with the inkjet head to fix the inkjet head, and the fastening portion may include a plurality of protrusions formed on a surface contacting the inkjet head.

[0019] In an embodiment, the lower surface may include a plurality of openings exposing ink discharge portions of the plurality of inkjet heads, and a region of the lower surface other than the openings may include a plurality of heat dissipation fins protruding in the third direction and arranged in the first direction.

[0020] According to an embodiment of the utility model, an inkjet head frame may include: a first frame, including a lower surface extending along a first direction and a second direction; a second frame, extending from an edge of the first frame toward a third direction perpendicular to the lower surface and forming a peripheral wall together with the first frame; and a third frame, including a plurality of partition walls, the plurality of partition walls extending along the first direction and the third direction and crossing the first side surface of the peripheral wall in the first direction and the second side surface opposite to the first side surface in the first direction, and the plurality of partition walls are arranged along the second direction, wherein the second frame may include a first flow path formed inside the first side surface along the second direction and a second flow path formed inside the second side surface along the second direction, and the third frame may include a plurality of third flow paths respectively formed inside the plurality of partition walls.

[0021] In an embodiment, the first flow path and the second flow path may be formed in a boundary area between the first frame and the second frame.

[0022] In an embodiment, each of the plurality of third flow paths extends in a zigzag shape inside the corresponding partition wall.

[0023] In an embodiment, a width of the partition wall in the first direction may gradually become narrower toward the third direction.

[0024] In an embodiment, one end of the third flow path may be connected to the first flow path, and the other end of the third flow path may be connected to the second flow path.

[0025] According to the embodiment, the inkjet head frame may also include: a fourth frame and a fifth frame, which protrude from the two sides of the first frame respectively, wherein the fourth frame may include a fourth flow path formed inside the fourth frame along the edge of the fourth frame, and the fifth frame may include a fifth flow path formed inside the fifth frame along the edge of the fifth frame.

[0026] In an embodiment, one end of the fourth flow path may be connected to the cooling water suction port, and the other end of the fourth flow path may be connected to the first flow path, one end of the fifth flow path may be connected to the cooling water discharge port, and the other end of the fifth flow path may be connected to the second flow path,

[0027] In an embodiment, the first frame, the second frame, the third frame, the fourth frame and the fifth frame are manufactured by a three-dimensional printing method selected from the group consisting of selective laser melting (SLM: Selective Laser Melting), selective laser sintering (SLS: Selective Laser Sintering) and stereolithography (SLA: Selective Lithography Apparatus).

[0028] Technical Effects

[0029] According to an embodiment of the utility model, by forming a flow path inside the inkjet head frame and allowing cooling water to flow through the flow path during the process of using an inkjet printer, the impact of the heat generated when discharging ink on the device or frame around the inkjet head can be minimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic perspective view showing an inkjet printing apparatus according to an embodiment.

[0031] Figure 2 is a schematic plan view showing an inkjet printing apparatus according to an embodiment.

[0032] Figure 3 This is a diagram for explaining the influence of heat generated by the ink discharge section on the surrounding area.

[0033] Figure 4a and Figure 4b It is a figure for demonstrating the inkjet head frame and the inkjet head group according to an embodiment.

[0034] Figure 5a to Figure 5f It is a diagram for explaining a flow path formed in an inkjet head frame according to an embodiment and a path where cooling water flows.

[0035] Figure 6a and Figure 6b It is a diagram for explaining heat dissipation fins formed on the peripheral wall of the inkjet head frame according to the embodiment.

[0036] Figure 7a and Figure 7b It is a diagram for explaining heat dissipation fins formed on the lower surface of the inkjet head frame according to the embodiment.

[0037] Figure 8aand Figure 8b This is a diagram for explaining the manner in which the inkjet head is coupled to the inkjet head frame in the embodiment. DETAILED DESCRIPTION

[0038] The present invention may be modified in many ways and may have many forms. Specific embodiments are illustrated in the drawings and described in detail herein. However, this does not limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and even substitutes included in the concept and technical scope of the present invention.

[0039] When describing the drawings, similar reference numerals are used for similar components. In the drawings, for the clarity of the utility model, the size of the structure is enlarged and shown. The terms first, second, etc. can be used to describe a variety of components, but the above components are not limited to the above terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of the rights of the utility model, the first component can be named as the second component, and similarly, the second component can be named as the first component.

[0040] In the present application, the terms "including" or "having" should be understood as being used to specify the existence of features, numbers, steps, operations, constituent elements, parts or combinations thereof recorded in the specification, rather than excluding in advance the existence or additional possibility of one or more other features, numbers, steps, operations, constituent elements, parts or combinations thereof. Moreover, in the case where a layer, film, region, plate or other part is located "on" another part, this includes not only the case where it is located "immediately above" the other part, but also the case where there is another part in the middle. In addition, in the present specification, in the case where a part recorded as a layer, film, region, plate or the like is formed on another part, the direction of the formation is not limited to the upper direction, but includes the case where it is formed in the side or lower direction. On the contrary, in the case where a layer, film, region, plate or the like is recorded as being located "below" another part, this includes not only the case where it is located "immediately below" the other part, but also the case where there is another part in the middle.

[0041] In the present application, when referring to "a certain constituent element (e.g., 'first constituent element') (functionally or communicatively coupled with / to) or connected to another constituent element (e.g., 'second constituent element')", it should be understood that the certain constituent element may be directly connected to the other constituent element, or may be connected to the other constituent element through other constituent elements (e.g., "third constituent element"). On the contrary, when referring to a certain constituent element (e.g., "first constituent element") being "directly connected to" or "directly connected to" another constituent element (e.g., "second constituent element"), it should be understood that there is no other constituent element (e.g., "third constituent element") between the certain constituent element and the other constituent element.

[0042] Hereinafter, preferred embodiments of the present invention and matters necessary for those skilled in the art to easily understand the contents of the present invention will be described in detail with reference to the accompanying drawings. In the following description, for singular expressions, unless the context clearly indicates that only the singular is included, the singular expression also includes the plural expression.

[0043] Figure 1 is a schematic perspective view showing an inkjet printing apparatus according to an embodiment. Figure 2 is a schematic plan view showing an inkjet printing apparatus according to an embodiment.

[0044] Reference Figure 1 and Figure 2 The inkjet printing device 1 may include a track 10, a platform 20, a probe 30, a unit support 40 and an inkjet head device IHD.

[0045] The rail 10 is a path along which the stage 20 moves. Accordingly, the substrate SUB may move along the rail 10. The rail 10 may extend in a process direction (eg, a first direction DR1) with respect to the substrate SUB.

[0046] The platform 20 forms an area where the substrate SUB can be arranged, and can move along the track 10. The platform 20 can be arranged on the track 10. According to an embodiment, the platform 20 may include a main platform 22 adjacent to the track 10 and a sub-platform 24 for the substrate SUB to be arranged. The substrate SUB can be loaded (loaded) on the platform 20 or unloaded (unloaded) from the platform 20.

[0047] The probe 30 may be arranged on the platform 20. The probe 30 may be arranged adjacent to one side and / or the other side of the substrate SUB. The probe 30 may form an electric field on the substrate SUB. The probe 30 may be provided in plurality and may be arranged at a plurality of positions adjacent to the substrate SUB so as to form an electric field in the entire region of the substrate SUB.

[0048] The unit support portion 40 may be arranged at a position based on the process direction of the inkjet printing device 1, and may be connected (or combined) with the inkjet head device IHD. According to an embodiment, the unit support portion 40 may be a gantry. Accordingly, the unit support portion 40 may include a first support portion extending in a vertical direction (e.g., a third direction DR3) and a second support portion extending in a horizontal direction (e.g., a second direction DR2) for combining with the inkjet head device IHD.

[0049] The inkjet head device IHD is configured to be connected (or coupled) to the unit support portion 400 and to supply (or provide) the ink INK containing the light emitting element LD onto the substrate SUB (see Figure 3 ). For example, the inkjet head device IHD may discharge ink INK onto the substrate SUB.

[0050] The inkjet head device IHD may include a head base HB and an inkjet head IH.

[0051] The head base HB may be connected to the unit support 400 to form an area where the inkjet head IH can be arranged. The head base HB may extend in one direction and be separated from the platform 20. According to an embodiment, the head base HB may move the inkjet head IH. In an embodiment, the head base HB may be configured to accommodate the inkjet head IH.

[0052] The inkjet head IH may be arranged on one surface of the head base HB. For example, the inkjet head IH may be provided in plural and may be arranged to be spaced apart from each other on the lower surface of the head base HB. The number of the inkjet heads IH is not necessarily limited to a particular example.

[0053] The inkjet head IH is configured to supply the ink INK onto the substrate SUB. For example, the inkjet head IH may include a nozzle for discharging the ink INK to discharge the ink INK to the outside.

[0054] Figure 3 This is a diagram for explaining the influence of heat generated by the ink discharge section on the surrounding area.

[0055] Reference Figure 3 , refer to Figure 2The inkjet head device IHD to be described may include an ink flow path 301, a heater 303, and an ink discharge portion 305. The ink INK may be supplied to the ink discharge portion 305 through the ink flow path 301 and then discharged onto the substrate SUB. At this time, in order to allow the ink INK to be normally discharged from the ink discharge portion 305, it may be necessary to reduce the viscosity of the ink INK. The inkjet head device IHD may heat the ink INK to an appropriate temperature to reduce the viscosity of the ink INK. To this end, the inkjet head device IHD may include a heater 303 for heating the ink INK inside.

[0056] In the case where the ink INK is heated by the heater 303, the heat generated by the heater 303 or the heat generated by the ink INK heated by the heater 303 may diffuse to the outside. The diffused heat may deform the physical structure of the head base HB or the head frame combined with the inkjet head device IHD. The diffused heat may cause physical deformation of the substrate SUB to which the ink INK is attached. The diffused heat may affect the operation of a precision sensor such as a temperature control device or an optical interference system equipped in the inkjet head device IHD. In the case where an inkjet printer is used in a semiconductor process or a display manufacturing process, it may be necessary to precisely adjust the position to which the ink INK is attached. In the case where the heat generated by the heater 303 affects the frame around the heater 303, the substrate SUB, or the surrounding devices, it may be difficult to precisely adjust the position to which the ink INK is attached. Therefore, it is important to prevent the heat generated from the heater 303 or the ink INK from diffusing to the surrounding area and to keep the surroundings of the inkjet head device IHD and the substrate SUB at the same or similar temperature as normal temperature.

[0057] Figure 4a and Figure 4b It is a figure for demonstrating the inkjet head frame and the inkjet head group according to an embodiment.

[0058] Specifically, Figure 4a It may be a diagram showing an inkjet head frame 400a, Figure 4b The figure may be a diagram showing an inkjet head pack 400b. The inkjet head pack 400b may include a plurality of inkjet heads 470a, 470b, 470c, 470d and an inkjet head frame 400a configured to accommodate the inkjet heads 470a, 470b, 470c, 470d. In other words, the inkjet head pack 400b may be a component in which the plurality of inkjet heads 470a, 470b, 470c, 470d are combined with the inkjet head frame 400a. In an embodiment, the plurality of inkjet heads 470a, 470b, 470c, 470d may be combined with the reference head frame 400a while being combined with the inkjet head frame 400a. Figure 2 Description of the door frame.

[0059] Reference Figure 4a, the inkjet head frame 400a may include a first frame 410, a second frame 420, a third frame 430, a fourth frame 440, and a fifth frame 450. Although the inkjet head frame 400a is divided into a plurality of frames (the first frame 410 to the fifth frame 450) for ease of explanation, in an embodiment, the inkjet head frame 400a may be formed integrally. For example, the inkjet head frame 400a may be manufactured by a three-dimensional (3D) printing method such as selective laser melting (SLM), selective laser sintering (SLS), and stereolithography (SLA).

[0060] Specifically, the first frame 410 may include a lower surface extending in the first direction DR1 and the second direction DR2, and may be combined with the second frame 420 extending in the third direction DR3 perpendicular to the lower surface to form a peripheral wall. The third frame 430 may include a plurality of partition walls 430a, 430b, 430c, 430d, 430e. Each partition wall 430a, 430b, 430c, 430d, 430e may be formed in the inner space of the inkjet head frame 400a formed by the peripheral wall, crossing between the first side surface and the second side surface opposite to the first side surface. Each partition wall 430a, 430b, 430c, 430d, 430e may be a shape extending in the first direction DR1 and the third direction DR3. A plurality of partition walls 430a, 430b, 430c, 430d, 430e may be arranged in the second direction DR2 on the inner side of the peripheral wall. Figure 4a , the third frame 430 is illustrated as including five partition walls 430a, 430b, 430c, 430d, 430e, but the number of partition walls can be variously determined based on the number of inkjet heads 470 accommodated in the inkjet head frame 400a. In an embodiment, the width of the partition walls 430a, 430b, 430c, 430d, 430e in the first direction DR1 can be gradually narrowed toward the third direction DR3. In this case, the speed at which the gas around the heater 303 for heating the ink INK rises along the outer surface of the inkjet head frame 400a can be slowed down, and accordingly, the speed at which the heat around the heater 303 diffuses to the frame around the heater 303 can be slowed down.

[0061] The inkjet head frame 400a may further include: a fourth frame 440 protruding from one side of the first frame 410 in a direction completely opposite to the second direction DR2; and a fifth frame protruding from the other side of the first frame 410 in the second direction DR. In an embodiment, the width of the fourth frame 440 and the fifth frame 450 in the first direction DR1 may be smaller than the width of the first frame 410 or the second frame 420 in the first direction DR1. The fourth frame 440 and the fifth frame 450 may include a first fastening member 465 and a second fastening member 467, respectively. The first fastening member 465 and the second fastening member 467 may be used to couple the inkjet head frame 400a or the inkjet head group 400b to the reference Figure 2 Specifically, the upper surface of the fourth frame 440 may be connected to a separate connection plate extending along the third direction DR3 by means of a first fastening member 465, and the upper surface of the fifth frame 450 may be connected to a separate connection plate extending along the third direction DR3 by means of a second fastening member 467. The connection plates respectively coupled to the fourth frame 440 and the fifth frame 450 may be coupled to the gate, so that the inkjet head frame 400a or the inkjet head group 400b may be coupled to the gate.

[0062] The inkjet head frame 400a may include a plurality of receiving portions 469a, 469b, 469c, 469d formed by the first frame 410, the second frame 420, and the third frame 430. Specifically, the first partition wall 430a and the second partition wall 430b may form the first receiving portion 469a together with the peripheral wall of the inkjet head frame 400a, the second partition wall 430b and the third partition wall 430c may form the second receiving portion 469b together with the peripheral wall of the inkjet head frame 400a, and the third partition wall 430c and the fourth partition wall 430d may form the third receiving portion 469c together with the peripheral wall of the inkjet head frame 400a. The fourth partition wall 430d and the fifth partition wall 430e may form the fourth receiving portion 469d together with the peripheral wall of the inkjet head frame 400a.

[0063] Reference Figure 4b , a plurality of housing portions 469a, 469b, 469c, 469d can house inkjet heads 470a, 470b, 470c, 470d. The inkjet heads 470a, 470b, 470c, 470d can be combined with the inkjet head frame 400a by moving the inkjet heads 470a, 470b, 470c, 470d from the upper side of the inkjet head frame 400a in a direction completely opposite to the third direction DR3. Alternatively, the inkjet heads 470a, 470b, 470c, 470d can be combined with the inkjet head frame 400a by moving the inkjet heads 470a, 470b, 470c, 470d from the lower side of the inkjet head frame 400a in the third direction DR3.

[0064] The inkjet head frame 400a may include a plurality of flow paths formed inside each frame. The inkjet head frame 400a may include a cooling water suction port 461 and a cooling water discharge port 463. Figure 4a or Figure 4b In the embodiment, the cooling water suction port 461 and the cooling water discharge port 463 may extend from the upper surface of the first frame 410 toward the third direction DR3. However, in the inkjet head frame 400a, the cooling water suction port 461 and the cooling water discharge port 463 may also be formed at the same direction as the inkjet head frame 400a. Figure 4a and Figure 4b The positions shown vary by location.

[0065] In an embodiment, a plurality of flow paths formed inside each frame may be connected to each other. One end of one of the plurality of flow paths may be connected to the cooling water suction port 461, and one end of another of the plurality of flow paths may be connected to the cooling water discharge port 463. In an embodiment, the cooling water (Coolant) sucked into the cooling water suction port 461 may be circulated inside the inkjet head frame 400a through the plurality of flow paths formed inside each frame, and then discharged through the cooling water discharge port 463.

[0066] Figure 5a to Figure 5f It is a diagram for explaining a flow path formed in an inkjet head frame according to an embodiment and a path where cooling water flows.

[0067] Figure 5a It is a plan view of the inkjet head frame 400a as viewed from above. Figure 5b is with Figure 5a AA' corresponds to a cross-sectional view of the inkjet head frame 400a. Figure 5c is with Figure 5a BB' corresponds to a cross-sectional view of the inkjet head frame 400a. Figure 5d is with Figure 5a CC' corresponds to a cross-sectional view of the inkjet head frame 400a. Figure 5e is with Figure 5a DD' corresponds to a cross-sectional view of the inkjet head frame 400a. Figure 5f is with Figure 5a EE' corresponds to a cross-sectional view of the inkjet head frame 400a.

[0068] Reference Figure 4a and Figure 4b and Figure 5aAccording to the embodiment, the inkjet head frame 400a may include: a first flow path and a second flow path, which are formed inside the side wall; a third flow path, which is formed inside the partition walls 430a, 430b, 430c, 430d, and 430e; a fourth flow path, which is connected to the cooling water suction port 461 and is formed on the side wall of the first frame 410 and inside the fourth frame 440; and a fifth flow path, which is connected to the cooling water discharge port 463 and is formed on the other side wall of the first frame 410 and inside the fifth frame 450.

[0069] Specifically, refer to Figure 5a The first frame 410 may include a first flow path formed inside the first side wall 411 along the second direction DR2 and a second flow path formed inside the second side wall 412 along the second direction DR2. The first side wall 411 and the second side wall 412 may constitute a reference Figure 4a and Figure 4b The first flow path and the second flow path may be formed in a boundary area between the first frame 410 and the second frame 420. Figure 5a and Figure 5c , one end of the first flow path may be connected to the fourth flow path. In addition, the first flow path may be connected to the third flow path formed in each of the plurality of partition walls 430a, 430b, 430c, 430d, 430e. Figure 5a and Figure 5e , one end of the second flow path may be connected to the fifth flow path. In addition, the second flow path may be connected to a third flow path formed in each of the plurality of partition walls 430a, 430b, 430c, 430d, 430e. In other words, the first flow path and the second flow path may be connected to each other via the third flow path formed inside the plurality of partition walls 430a, 430b, 430c, 430d, 430e.

[0070] The third frame 430 may include a third flow path formed inside each partition wall 430a, 430b, 430c, 430d, 430e. In an embodiment, one end of the third flow path may be connected to the first flow path, and the other end of the third flow path may be connected to the second flow path. The third flow path may be formed in the entire internal volume of the partition walls 430a, 430b, 430c, 430d, 430e except for the portion overlapping with the heater 303 of the inkjet head 470. That is, in an embodiment, a heater 303 for heating the ink may be provided at the lower portion (the area from which the ink is discharged) of the inkjet head 470 combined with the inkjet head frame 400a, and the third flow path may not be formed inside the partition walls 430a, 430b, 430c, 430d, 430e in the partial area overlapping with the heater 303 of the inkjet head 470. Reference Figure 5dIn order to form the third flow path uniformly in the entire internal volume of the partition walls 430a, 430b, 430c, 430d, and 430e except for the portion overlapping with the heater 303 of the inkjet head 470, the third flow path can be formed by extending in a zigzag shape inside the partition walls 430a, 430b, 430c, 430d, and 430e.

[0071] A fourth flow path may be formed inside the third side wall 413 of the inkjet head frame 400a and inside the fourth frame 440. The third side wall 413 may be one of the plurality of side walls included in the first frame 410. One end of the fourth flow path may be connected to the cooling water suction port 461, and the other end of the fourth flow path may be connected to the first flow path. Figure 5a and Figure 5b The fourth flow path may be formed as a plurality of floors inside the third sidewall 413 and inside the fourth frame 440. The fourth flow path included in the third sidewall 413 may be formed extending along the first direction DR1 in each floor. The fourth flow path included in the fourth frame 440 may be formed inside the frame along the edge of the fourth frame 440 in each floor.

[0072] A fifth flow path may be formed inside the fourth side wall 414 of the inkjet head frame 400a and inside the fifth frame 450. The fourth side wall 414 may be one of the plurality of side walls included in the first frame 410. One end of the fifth flow path may be connected to the cooling water discharge port 463, and the other end of the fifth flow path may be connected to the second flow path. Figure 5a and Figure 5f , the fifth flow path may be formed as a plurality of layers inside the fourth sidewall 414 and inside the fifth frame 450. The fifth flow path included in the fourth sidewall 414 may be formed extending along the first direction DR1 in each layer. The fifth flow path included in the fifth frame 450 may be formed inside the frame along the edge of the fifth frame 450 in each layer.

[0073] Reference Figure 5a and Figure 5b The cooling water sucked into the inkjet head frame 400a of the inkjet head group 400b through the cooling water suction port 461 may flow along the fourth flow path formed inside the third side wall 413 and the fourth frame 440. The cooling water may flow along the first flow path formed inside the first side wall 411 after passing through all layers inside the third side wall 413 and the fourth frame 440 along the fourth flow path. Figure 5c The cooling water flowing along the first flow path toward the second direction DR2 can flow to the third flow path through a plurality of connection parts connected to one end of the plurality of third flow paths. Figure 5dAs described above, the cooling water can flow evenly through the insides of the plurality of partition walls 430a, 430b, 430c, 430d, and 430e through the third flow path formed in a zigzag shape. Figure 5e , the cooling water may flow along the second flow path connected to the other end of the third flow path after passing through the third flow path. The cooling water passing through the second flow path may flow along the fifth flow path connected to the second flow path. Figure 5a and Figure 5f , the cooling water passing through the second flow path may flow along the fifth flow path formed inside the fifth frame 450 and the fourth side wall 414. After flowing through all layers inside the fifth frame 450 and the fourth side wall 414 along the fifth flow path, the cooling water may be discharged to the outside of the inkjet head frame 400a or the inkjet head group 400b through the cooling water discharge port 463 connected to one end of the fifth flow path.

[0074] Figure 6a and Figure 6b It is a diagram for explaining heat dissipation fins formed on the peripheral wall of the inkjet head frame according to the embodiment.

[0075] Reference Figure 6a and Figure 6b The inkjet head frame 400a may include a plurality of cooling fins 610 extending along the third direction DR3 and protruding in a vertical direction from the outer side surface of the peripheral wall. By arranging a plurality of cooling fins 610 on the outer side surface of the peripheral wall, the area of ​​the surface of the inkjet head frame 400a in contact with the external air can be increased, thereby increasing the heat exchange efficiency between the inkjet head group 400b and the outside. Figure 6a and Figure 6b , the case where the heat dissipation fins 610 are arranged on the surface of only one of the side walls included in the peripheral wall is illustrated; however, the heat dissipation fins 610 may be arranged on the surfaces of all the side walls of the peripheral wall.

[0076] Figure 7a and Figure 7b It is a diagram for explaining heat dissipation fins formed on the lower surface of the inkjet head frame according to the embodiment.

[0077] Reference Figure 7a and Figure 7b , the lower surface of the inkjet head frame 400a may include a plurality of openings 720. The openings 720 may be regions where the ink discharge portions 305 of the plurality of inkjet heads 470 are exposed when the inkjet heads 470 are coupled to the inkjet head frame 400a. The ink INK may be discharged to the outside through nozzles formed at the ink discharge portions 305.

[0078] The area except the opening 720 in the lower surface of the head frame 400a may include a plurality of heat dissipation fins 710 protruding in a direction perpendicular to the lower surface of the head frame 400a (eg, a direction completely opposite to the third direction DR3) and arranged in the first direction DR1.

[0079] Figure 8a and Figure 8b This is a diagram for explaining the manner in which the inkjet head is coupled to the inkjet head frame in the embodiment.

[0080] Reference Figure 8a and Figure 8b , the inkjet head group 400b may include reference Figure 4a The plurality of housing portions 469 are shown, and the inkjet head 470 may be coupled to each housing portion 469. At this time, the inkjet head 470 may be coupled to the housing portion 469 in a manner that an air gap is formed between the side of the inkjet head 470 and the partition walls 430a, 430b, 430c, 430d, 430e. In this case, the area in which the surface of the inkjet head 470 contacts the surface of the inkjet head frame 400a can be reduced, and accordingly, heat transfer from the inkjet head 470 to the inkjet head frame 400a can be reduced.

[0081] In an embodiment, the lower surface of the inkjet head frame 400a may include a fastening portion 810 that is combined with the inkjet head 470 to fix the inkjet head 470 so that it does not move. The fastening portion 810 may include support members 811a, 811b and fastening bolts 812a, 812b. The fastening portion 810 may be located at both end sides of the opening portion 720 formed on the lower surface of the inkjet head frame 400a to expose the ink discharge portion 305 of the inkjet head 470.

[0082] The support member 811 may support the inkjet head 470 in a third direction DR3 perpendicular to the lower surface of the inkjet head frame 400a, so that the inkjet head 470 coupled to the receiving portion 469 is not separated from the inkjet head frame 400a due to gravity. The fastening bolt 812 may be coupled to the inkjet head 470 by penetrating a through hole of the support member 811 along the third direction DR3. The support member 811 may include a plurality of protrusions 830 formed on a surface in contact with the inkjet head 470. The plurality of protrusions 830 may minimize heat transfer from the inkjet head 470 to the inkjet head frame 400a by further reducing the area in contact with the inkjet head frame 400a.

[0083] The technical concept of the present invention is specifically described based on the above-mentioned embodiments, but it should be noted that the embodiments are for illustration rather than limitation. Moreover, a person with ordinary knowledge in the technical field of the present invention should understand that a variety of variations can be implemented within the scope of the technical concept of the present invention.

[0084] The scope of the present invention is not limited to the contents described in the detailed description of the specification, but is determined by the claims. In addition, all changes or modifications derived from the meaning, scope and equivalent concepts of the claims should be interpreted as being included in the scope of the present invention.

Claims

1. An inkjet head group, It is characterized in that include: A first frame including a lower surface extending along a first direction and a second direction; a second frame extending from an edge of the first frame toward a third direction perpendicular to the lower surface to form a peripheral wall together with the first frame; as well as a third frame, comprising a plurality of partition walls, the plurality of partition walls extending along the first direction and the third direction and crossing between a first side wall of the peripheral wall in the first direction and a second side wall opposite to the first side wall in the first direction, and the plurality of partition walls are arranged along the second direction, wherein the first frame includes a first flow path formed inside the first side wall along the second direction and a second flow path formed inside the second side wall along the second direction, The third frame includes a plurality of third flow paths respectively formed inside the plurality of partition walls.

2. The inkjet head assembly according to claim 1, It is characterized in that The first flow path and the second flow path are formed in a boundary area between the first frame and the second frame. Each of the plurality of third flow paths extends in a zigzag shape inside the corresponding partition wall, One end of the third flow path is connected to the first flow path, and the other end of the third flow path is connected to the second flow path. The width of the partition wall in the first direction gradually narrows toward the third direction.

3. The inkjet head assembly according to claim 1, It is characterized in that Also includes: The fourth frame and the fifth frame protrude from two sides of the first frame respectively. A fourth flow path is formed in the third side wall of the peripheral wall in the second direction and inside the fourth frame, A fifth flow path is formed in a fourth side wall of the peripheral wall that is opposite to the third side wall in the second direction and inside the fifth frame, The peripheral wall includes a plurality of heat dissipation fins extending along the third direction and protruding from the outer side surface in a vertical direction.

4. The inkjet head group according to claim 1, It is characterized in that Also includes: The fourth frame and the fifth frame protrude from two sides of the first frame respectively. A fourth flow path is formed in the third side wall of the peripheral wall in the second direction and inside the fourth frame, A fifth flow path is formed in a fourth side wall of the peripheral wall that is opposite to the third side wall in the second direction and inside the fifth frame, One end of the fourth flow path is connected to the cooling water suction port, and the other end of the fourth flow path is connected to the first flow path. One end of the fifth flow path is connected to the cooling water discharge port, and the other end of the fifth flow path is connected to the second flow path.

5. The inkjet head group according to claim 3 or 4, It is characterized in that The first frame, the second frame, the third frame, the fourth frame and the fifth frame are manufactured by a three-dimensional printing method selected from selective laser melting, selective laser sintering and photo-stereolithography.

6. The inkjet head group according to claim 1, It is characterized in that Also includes: A plurality of inkjet heads are respectively accommodated in a plurality of accommodating portions formed by the peripheral wall and the partition wall. wherein the housing portion includes an air gap formed between a side surface of each of the plurality of inkjet heads and the partition wall, The lower surface includes a fastening portion that is combined with the inkjet head to fix the inkjet head. The fastening portion includes a plurality of protrusions formed on a surface contacting the inkjet head.

7. The inkjet head group according to claim 1, It is characterized in that Also includes: A plurality of inkjet heads are respectively accommodated in a plurality of accommodating portions formed by the peripheral wall and the partition wall. wherein the housing portion includes an air gap formed between a side surface of each of the plurality of inkjet heads and the partition wall, The lower surface includes a plurality of openings exposing ink discharge portions of the plurality of inkjet heads, The area of ​​the lower surface excluding the opening includes a plurality of heat dissipation fins protruding along the third direction and arranged along the first direction.

8. An inkjet head frame, It is characterized in that include: A first frame including a lower surface extending along a first direction and a second direction; a second frame extending from an edge of the first frame toward a third direction perpendicular to the lower surface to form a peripheral wall together with the first frame; as well as a third frame, comprising a plurality of partition walls, the plurality of partition walls extending along the first direction and the third direction and formed across a first side surface of the peripheral wall in the first direction and a second side surface opposite to the first side surface in the first direction, and the plurality of partition walls are arranged along the second direction, wherein the second frame includes a first flow path formed inside the first side surface along the second direction and a second flow path formed inside the second side surface along the second direction, The third frame includes a plurality of third flow paths respectively formed inside the plurality of partition walls.

9. The inkjet head frame according to claim 8, It is characterized in that The first flow path and the second flow path are formed in a boundary area between the first frame and the second frame. Each of the plurality of third flow paths extends in a zigzag shape inside the corresponding partition wall, The width of the partition wall in the first direction gradually narrows toward the third direction, One end of the third flow path is connected to the first flow path, and the other end of the third flow path is connected to the second flow path.

10. The inkjet head frame according to claim 8, It is characterized in that Also includes: The fourth frame and the fifth frame protrude from two sides of the first frame respectively. The fourth frame includes a fourth flow path formed inside the fourth frame along an edge of the fourth frame, The fifth frame includes a fifth flow path formed inside the fifth frame along an edge of the fifth frame, One end of the fourth flow path is connected to the cooling water suction port, and the other end of the fourth flow path is connected to the first flow path. One end of the fifth flow path is connected to the cooling water outlet, and the other end of the fifth flow path is connected to the second flow path. The first frame, the second frame, the third frame, the fourth frame and the fifth frame are manufactured by a three-dimensional printing method selected from selective laser melting, selective laser sintering and photo-stereolithography.

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