WO2022210915A1 - 液体吐出ヘッド、吐出ヘッド構造体および記録装置 - Google Patents
液体吐出ヘッド、吐出ヘッド構造体および記録装置 Download PDFInfo
- Publication number
- WO2022210915A1 WO2022210915A1 PCT/JP2022/016097 JP2022016097W WO2022210915A1 WO 2022210915 A1 WO2022210915 A1 WO 2022210915A1 JP 2022016097 W JP2022016097 W JP 2022016097W WO 2022210915 A1 WO2022210915 A1 WO 2022210915A1
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- WIPO (PCT)
- Prior art keywords
- ejection head
- liquid
- liquid ejection
- supply pipe
- head
- Prior art date
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- 239000007788 liquid Substances 0.000 title claims abstract description 139
- 238000011084 recovery Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 238000007639 printing Methods 0.000 description 35
- 230000004048 modification Effects 0.000 description 16
- 238000012986 modification Methods 0.000 description 16
- 230000032258 transport Effects 0.000 description 12
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000976 ink Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 239000013043 chemical agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14016—Structure of bubble jet print heads
- B41J2/1408—Structure dealing with thermal variations, e.g. cooling device, thermal coefficients of materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/17—Ink jet characterised by ink handling
- B41J2/175—Ink supply systems ; Circuit parts therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/17—Ink jet characterised by ink handling
- B41J2/18—Ink recirculation systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/08—Embodiments of or processes related to ink-jet heads dealing with thermal variations, e.g. cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/20—Modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/21—Line printing
Definitions
- the disclosed embodiments relate to liquid ejection heads, ejection head structures, and recording apparatuses.
- Inkjet printers and inkjet plotters that use the inkjet recording method are known as printing devices.
- Such an inkjet printing apparatus is equipped with a liquid ejection head for ejecting liquid.
- a liquid ejection head there is known one in which a housing is brought into contact with a drive IC, which is a heat source, and the heat transferred from the drive IC is dissipated through the housing (see, for example, Patent Document 1). .
- a liquid ejection head includes a radiator plate, a head main body, a supply pipe, and a shielding portion.
- the heat sink contacts the heat source.
- the head main body has ejection holes for ejecting liquid.
- a supply pipe supplies the liquid to the head body.
- the shielding part is provided between the heat sink and the supply pipe, and is positioned away from the heat sink and the supply pipe.
- FIG. 1 is an explanatory diagram (part 1) of the recording apparatus according to the embodiment.
- FIG. 2 is an explanatory diagram (part 2) of the recording apparatus according to the embodiment.
- FIG. 3 is a plan view showing the configuration of the essential parts of the liquid ejection head according to the embodiment.
- 4 is a side view of the liquid ejection head shown in FIG. 3.
- FIG. 5 is a plan view showing the configuration of the main part of the liquid ejection head according to Modification 1 of the embodiment. 6 is a side view of the liquid ejection head shown in FIG. 5.
- FIG. FIG. 7 is a plan view showing the configuration of the main part of the liquid ejection head according to Modification 2 of the embodiment.
- FIG. 8 is a plan view showing the configuration of the main part of the liquid ejection head according to Modification 3 of the embodiment.
- FIG. 9 is a plan view showing a configuration of a main part of an ejection head structure including a liquid ejection head according to Modification 4 of the embodiment.
- 10 is a side view of the ejection head structure shown in FIG. 9.
- FIG. 11 is a plan view showing a configuration of a main part of an ejection head structure including a liquid ejection head according to Modification 5 of the embodiment.
- 12 is a side view of the ejection head structure shown in FIG. 11.
- FIG. 11 is a plan view showing a configuration of a main part of an ejection head structure including a liquid ejection head according to Modification 5 of the embodiment.
- FIG. 1 and 2 are explanatory diagrams of the printer according to the embodiment. Specifically, FIG. 1 is a schematic side view of the printer 1, and FIG. 2 is a schematic plan view of the printer 1.
- FIG. The printer 1 according to the embodiment is, for example, a color inkjet printer.
- the printer 1 includes a paper feed roller 2, a guide roller 3, a coating machine 4, a head case 5, a plurality of transport rollers 6, a plurality of frames 7, and a plurality of liquid ejection heads. 8 , a conveying roller 9 , a dryer 10 , a conveying roller 11 , a sensor section 12 , and a collecting roller 13 .
- the transport roller 6 is an example of a transport section.
- the printer 1 includes a paper feed roller 2, a guide roller 3, a coater 4, a head case 5, a plurality of transport rollers 6, a plurality of frames 7, a plurality of liquid ejection heads 8, a transport roller 9, a dryer 10, a transport A control unit 14 that controls the roller 11 , the sensor unit 12 and the collecting roller 13 is provided.
- the printer 1 records images and characters on the printing paper P by causing droplets to land on the printing paper P.
- the printing paper P is an example of a recording medium.
- the printing paper P is wound around the paper feed roller 2 before use.
- the printer 1 conveys the printing paper P from the paper supply roller 2 to the inside of the head case 5 via the guide rollers 3 and the coater 4 .
- the coating machine 4 evenly coats the printing paper P with the coating agent. As a result, since the printing paper P can be surface-treated, the printing quality of the printer 1 can be improved.
- the head case 5 accommodates a plurality of transport rollers 6 , a plurality of frames 7 and a plurality of liquid ejection heads 8 . Inside the head case 5, a space is formed that is isolated from the outside, except for a part that is connected to the outside, such as a portion where the printing paper P enters and exits.
- At least one of the control factors such as temperature, humidity, and air pressure in the internal space of the head case 5 is controlled by the control unit 14 as necessary.
- the transport roller 6 transports the printing paper P to the vicinity of the liquid ejection head 8 inside the head case 5 .
- the frame 7 is a rectangular flat plate, and is positioned above and close to the printing paper P transported by the transport rollers 6 . Further, as shown in FIG. 2, the frame 7 is positioned so that its longitudinal direction is perpendicular to the direction in which the printing paper P is conveyed. A plurality of (for example, four) frames 7 are positioned along the transport direction of the printing paper P inside the head case 5 .
- the liquid ejection head 8 ejects liquid supplied from a liquid tank.
- the control unit 14 controls the liquid ejection head 8 based on data such as images and characters to eject liquid toward the printing paper P.
- the distance between the liquid ejection head 8 and the printing paper P is, for example, approximately 0.5 to 20 mm.
- the liquid ejection head 8 is fixed to the frame 7.
- the liquid ejection head 8 is positioned so that its longitudinal direction is orthogonal to the direction in which the printing paper P is conveyed.
- the printer 1 according to the embodiment is a so-called line printer in which the liquid ejection head 8 is fixed inside the printer 1 .
- the printer 1 according to the embodiment is not limited to a line printer, and may be a so-called serial printer.
- a serial printer alternately performs recording while moving the liquid ejection head 8 back and forth in a direction intersecting the conveying direction of the printing paper P, for example, in a direction substantially perpendicular to the conveying direction, and conveying the printing paper P. It is a printer of the method to perform on.
- FIG. 2 shows an example in which three liquid ejection heads 8 are positioned in the forward direction of the printing paper P and two liquid ejection heads 8 are positioned in the rearward direction.
- the liquid ejection heads 8 are positioned so that their centers do not overlap.
- a plurality of liquid ejection heads 8 positioned on one frame 7 constitute a head group 8A.
- the four head groups 8A are positioned along the direction in which the printing paper P is transported.
- the same color ink is supplied to the liquid ejection heads 8 belonging to the same head group 8A.
- the printer 1 can print with four color inks using the four head groups 8A.
- the colors of ink ejected from each head group 8A are, for example, magenta (M), yellow (Y), cyan (C) and black (K).
- the control unit 14 can print a color image on the printing paper P by controlling each head group 8A to eject a plurality of colors of ink onto the printing paper P.
- a coating agent may be ejected from the liquid ejection head 8 onto the printing paper P.
- the number of liquid ejection heads 8 included in one head group 8A and the number of head groups 8A mounted on the printer 1 can be appropriately changed according to the target to be printed and printing conditions. For example, if the color to be printed on the printing paper P is a single color and the printable range is printed by one liquid ejection head 8, the number of the liquid ejection heads 8 mounted in the printer 1 is one. good.
- the print paper P printed inside the head case 5 is transported to the outside of the head case 5 by transport rollers 9 and passes through the inside of the dryer 10 .
- the dryer 10 dries the printing paper P that has been printed.
- the printing paper P dried by the dryer 10 is conveyed by the conveying roller 11 and collected by the collecting roller 13 .
- the printer 1 by drying the printing paper P with the dryer 10 , it is possible to suppress adhesion of the printing papers P that are wound together in the collecting roller 13 and prevent undried liquid from rubbing against each other. can.
- the sensor unit 12 is composed of a position sensor, a speed sensor, a temperature sensor, and the like.
- the control unit 14 can determine the state of each unit of the printer 1 and control each unit of the printer 1 based on the information from the sensor unit 12 .
- the printing paper P is used as the printing object (that is, the recording medium).
- the printing object that is, the recording medium.
- the printer 1 may convey the printing paper P by placing it on a conveyor belt instead of directly conveying it. By using the conveyor belt, the printer 1 can print on sheets, cut cloth, wood, tiles, and the like.
- the printer 1 may print a wiring pattern of an electronic device by ejecting liquid containing conductive particles from the liquid ejection head 8 . Further, the printer 1 may eject a predetermined amount of liquid chemical agent or liquid containing the chemical agent from the liquid ejection head 8 toward a reaction container or the like to produce a chemical agent.
- the printer 1 may include a cleaning section that cleans the liquid ejection head 8 .
- the cleaning section cleans the liquid ejection head 8 by, for example, a wiping process or a capping process.
- the wiping process is, for example, a process of removing the liquid adhering to the liquid ejection head 8 by wiping the surface of the portion where the liquid is ejected with a flexible wiper.
- the capping process is performed, for example, as follows. First, a cap is placed so as to cover a part where the liquid is to be discharged, for example, the nozzle surface 23a (see FIG. 4) of the channel member 23 where the discharge holes are located (this is called capping). Thereby, a substantially closed space is formed between the nozzle surface 23a and the cap.
- the liquid is repeatedly discharged in such a sealed space.
- the liquid is repeatedly discharged in such a sealed space.
- FIG. 3 is a plan view showing the configuration of the essential parts of the liquid ejection head according to the embodiment. 4 is a side view of the liquid ejection head shown in FIG. 3.
- FIG. 3 is a plan view showing the configuration of the essential parts of the liquid ejection head according to the embodiment. 4 is a side view of the liquid ejection head shown in FIG. 3.
- the liquid ejection head 8 includes a radiator plate 21 , a head main body 24 , a supply pipe 31 , a recovery pipe 32 and a shielding portion 40 .
- the head main body 24 has a reservoir 22 and a channel member 23 .
- the radiator plate 21 has a box shape with an open bottom surface.
- the radiator plate 21 is in contact with the heat source.
- the radiator plate 21 radiates heat transferred from the heat source to the surroundings.
- the material of heat sink 21 is, for example, aluminum whose surface is anodized. Further, the radiator plate 21 may be formed by using a plurality of plate-like members.
- the heat source is, for example, one or more driving ICs (not shown) that control the driving of the head body 24.
- the heat source is in contact with the side surface of the heat sink 21, for example.
- the heat source may be in contact with the upper surface or the lower surface of the radiator plate 21 .
- the heat source may be in contact with the heat sink 21 via a member such as thermally conductive grease on the side surface or other surface of the heat sink 21 . Further, at least part of the heat source may be in contact with the radiator plate 21 .
- the reservoir 22 has a channel inside and is supplied with liquid from the outside through the supply pipe 31 .
- the reservoir 22 has a function of supplying liquid to the channel member 23 and a function of storing the liquid supplied to the channel member 23 .
- the channel member 23 has a substantially flat plate shape, and liquid is supplied from the reservoir 22 to the inside of the channel member 23 .
- the flow path member 23 has a nozzle surface 23 a positioned away from the reservoir 22 .
- a plurality of ejection holes for ejecting liquid onto the printing paper P are positioned on the nozzle surface 23a.
- a flow channel is positioned to allow the liquid to flow from the reservoir 22 side to the nozzle surface 23a side.
- the supply pipe 31 is connected to an opening (not shown) located at one end in the longitudinal direction of the reservoir 22 .
- a supply pipe 31 supplies liquid to the inside of the reservoir 22 .
- the material of the supply pipe 31 is, for example, polypropylene or other resin.
- the recovery pipe 32 is connected to an opening (not shown) located on the other end side of the reservoir 22 in the longitudinal direction.
- the recovery pipe 32 recovers liquid from inside the reservoir 22 .
- the shielding part 40 is located away from the radiator plate 21 .
- the shielding part 40 is fixed to the reservoir 22 by, for example, screwing using an L-shaped fixing member (not shown) if necessary.
- the material of shielding part 40 is, for example, aluminum or stainless steel.
- the shielding part 40 absorbs part of the heat radiated from the radiator plate 21 .
- the shielding part 40 is provided between the radiator plate 21 and the supply pipe 31 . Since the heat radiated from the radiator plate 21 is blocked by the shielding portion 40 , it is less likely to be transmitted to the supply pipe 31 .
- the shielding part 40 is located away from the supply pipe 31 , the heat absorbed by the shielding part 40 is less likely to be transmitted to the supply pipe 31 . Thereby, the liquid flowing through the supply pipe 31 is stably supplied to the inside of the reservoir 22 at a desired proper temperature. As a result, the liquid ejection head 8 can stably eject the liquid from the nozzle surface 23a.
- the shielding part 40 may have a lower emissivity than the heat sink 21 .
- the heat absorbed by the shielding part 40 is less likely to radiate to the surroundings of the shielding part 40, so that the radiation of the heat absorbed by the shielding part 40 can be moderated. Therefore, the liquid flowing through the supply pipe 31 is stably supplied to the inside of the reservoir 22 at a desired proper temperature.
- the liquid ejection head 8 can stably eject the liquid from the nozzle surface 23a.
- the emissivity of the shielding part 40 and the heat sink 21 can be measured according to JIS A1423:2017.
- the shielding part corresponding to the shielding part 40 may not be positioned between the radiator plate 21 and the recovery tube 32 .
- the heat transferred to the radiator plate 21 can be quickly released to the recovery pipe 32, and the heat radiator plate 21 and the heat source can be dissipated.
- the height of the shielding part 40 from the head body 24 is higher than the height of the heat sink 21 from the head body 24 . Therefore, the heat radiated from the radiator plate 21 can be blocked by the shielding portion 40 . Therefore, the heat radiated from the radiator plate 21 is less likely to be supplied to the supply pipe 31 .
- FIG. 5 is a plan view showing the configuration of the main part of the liquid ejection head according to Modification 1 of the embodiment.
- 6 is a side view of the liquid ejection head shown in FIG. 5.
- symbol is attached
- the shielding portion 40 is different from the liquid ejection head 8 according to the embodiment in that it is bent in plan view. As shown in FIG. 5, the shielding portion 40 has a first portion 40a, a second portion 40b, and a third portion 40c.
- the first portion 40a is located between the radiator plate 21 and the supply pipe 31 and extends in the lateral direction of the reservoir 22. As shown in FIG.
- the second portion 40 b and the third portion 40 c extend in the longitudinal direction of the reservoir 22 from both ends of the first portion 40 a extending in the lateral direction of the reservoir 22 .
- the shielding part 40 is positioned so as to surround the heat sink 21 in plan view.
- the shielding part 40 By locating the shielding part 40 so as to surround the radiator plate 21 in plan view, the effect of shielding the heat radiated from the radiator plate 21 by the shielding part 40 is further enhanced. Thereby, the liquid flowing through the supply pipe 31 is stably supplied to the inside of the reservoir 22 at a desired proper temperature. As a result, the liquid ejection head 8 can stably eject the liquid from the nozzle surface 23a. Moreover, the strength of the shielding part 40 can be increased by bending the shielding part 40 in plan view.
- the shielding portion 40 that is bent so as to surround the radiator plate 21 in plan view, but the shielding portion 40 may be curved in plan view. Moreover, the shielding part 40 may be bent or curved so as to surround the supply pipe 31 in plan view. Also, the first portion 40a, the second portion 40b, and the third portion 40c may have different heights.
- FIG. 7 is a plan view showing the configuration of the essential parts of the liquid ejection head according to Modification 2 of the embodiment.
- the emissivity of the shielding portion 40 is different between the first surface 41 facing the heat sink 21 and the second surface 42 facing the supply pipe 31 .
- the emissivity of the shielding part 40 is higher on the first surface 41 located on the radiator plate 21 side than on the second surface 42 located on the supply pipe 31 side.
- the first surface 41 which has a higher emissivity than the second surface 42, easily absorbs the heat radiated from the radiator plate 21.
- the second surface 42 having a lower emissivity than the first surface 41 the heat absorbed from the radiator plate 21 is less likely to be released.
- the effect of shielding the heat radiated from the radiator plate 21 by the shielding portion 40 is further enhanced, so that the liquid ejection head 8 can stably eject the liquid from the nozzle surface 23a.
- the first surface 41 having a higher emissivity than the second surface 42 is obtained, for example, by roughening or alumite processing the first surface 41 .
- the second surface 42 may be smoothed to have a lower emissivity than the first surface 41 .
- the emissivity of the first surface 41 located on the heat sink 21 side may be higher than the emissivity of the heat sink 21 .
- the emissivity of the first surface 41 located on the heat sink 21 side may be higher than the emissivity of the heat sink 21 .
- FIG. 8 is a plan view showing the configuration of the main part of the liquid ejection head according to Modification 3 of the embodiment.
- the shielding part 40 has a first member 43 and a second member 44. As shown in FIG. The emissivity of the shielding part 40 is higher in the first member 43 located on the heat sink 21 side than in the second member 44 located on the supply pipe 31 side.
- the material of the first member 43 is, for example, aluminum whose surface is anodized
- the material of the second member 44 is, for example, stainless steel or aluminum whose surface is not anodized.
- the heat radiated from the radiator plate 21 is easily absorbed by the first member 43 having a higher emissivity than the second member 44 .
- the second member 44 having a lower emissivity than the first member 43 the heat absorbed from the heat sink 21 is less likely to be released.
- the effect of shielding the heat radiated from the radiator plate 21 by the shielding portion 40 is further enhanced, so that the liquid ejection head 8 can stably eject the liquid from the nozzle surface 23a.
- FIG. 9 is a plan view showing the configuration of the main parts of an ejection head structure provided with a liquid ejection head according to Modification 4 of the embodiment.
- 10 is a side view of the ejection head structure shown in FIG. 9.
- FIG. 9 is a plan view showing the configuration of the main parts of an ejection head structure provided with a liquid ejection head according to Modification 4 of the embodiment.
- 10 is a side view of the ejection head structure shown in FIG. 9.
- the ejection head structure 80 includes the liquid ejection head 8 and the box-shaped body 45. As shown in FIG. The box-shaped body 45 is positioned above the reservoir 22 and surrounds the heat sink 21 .
- the material of box-shaped body 45 is, for example, aluminum or stainless steel.
- a portion of the box-shaped body 45 located between the heat sink 21 and the supply pipe 31 also serves as the shielding portion 40 of the liquid ejection head 8 according to the embodiment.
- the box-shaped body 45 surrounds the heat sink 21 as a whole, the effect of shielding the heat radiated from the heat sink 21 is further enhanced.
- the ejection head structure 80 can stably eject the liquid from the nozzle surface 23a.
- the emissivity of the portion of the box-shaped body 45 corresponding to the shielding portion 40 of the liquid ejection head 8 may be lower than the emissivity of other portions of the box-shaped body 45 .
- the shielding effect of the heat radiated from the radiator plate 21 can be enhanced in the portion corresponding to the shielding portion 40, while the heat dissipation of the box-shaped body 45 can be enhanced in other portions.
- the box-shaped body 45 has a box shape, the strength is increased compared to the plate-shaped shielding portion 40 of the liquid ejection head 8 according to the embodiment.
- a cylindrical body with an open top may be positioned on the radiator plate 21 instead of the box-shaped body 45 .
- FIG. 11 is a plan view showing the configuration of a main part of an ejection head structure provided with a liquid ejection head according to Modification 5 of the embodiment.
- 12 is a side view of the ejection head structure shown in FIG. 11.
- the ejection head structure 80 includes the liquid ejection head 8 and a frame 50. As shown in FIG. The frame 50 is positioned above the reservoir 22 and fixes the liquid ejection head 8 by screwing, for example.
- the material of frame 50 is, for example, stainless steel or aluminum.
- the shielding part 40 also serves as part of the frame 50 . Therefore, the shielding portion 40 can be properly positioned without being fixed to the liquid ejection head 8 by screwing or the like. This increases the degree of freedom in designing the liquid ejection head 8 .
- the frame 50 may be a part of the frame 7 shown in FIGS. 1 and 2, or may be a separate member from the frame 7.
- the present invention is not limited to the above embodiments, and various modifications are possible without departing from the spirit of the present invention.
- the shielding portion 40 of the ejection head structure 80 shown in FIGS. 11 and/or 12 the shielding portion 40 of the liquid ejection heads 8 according to various modifications may be applied.
- the liquid ejection head 8 includes the radiator plate 21, the head main body 24, the supply pipe 31, and the shielding portion 40.
- the radiator plate 21 is in contact with the heat source.
- the head body 24 has ejection holes for ejecting liquid.
- the supply pipe 31 supplies liquid to the head body 24 .
- the shielding part 40 is provided between the radiator plate 21 and the supply pipe 31 and positioned away from the radiator plate 21 and the supply pipe 31 . As a result, the liquid can be stably ejected.
- the liquid ejection head 8 further includes a recovery pipe 32 for recovering the liquid from the head main body 24 , and no shielding portion is positioned between the radiator plate 21 and the recovery pipe 32 . As a result, the heat transferred to the radiator plate 21 can be quickly released.
- the shielding part 40 according to the embodiment is bent or curved in plan view. As a result, the liquid can be stably ejected.
- the emissivity of the shielding portion 40 is lower than that of the heat sink 21 . Thereby, radiation of the heat absorbed by the shielding part 40 can be moderated.
- the emissivity of the shielding portion 40 is higher on the radiation plate 21 side than on the supply pipe 31 side. As a result, the liquid can be stably ejected.
- the height of the shielding portion 40 from the head main body 24 is higher than the height of the heat sink 21 from the head main body 24 .
- the liquid can be stably ejected.
- the ejection head structure 80 includes a heat sink 21 that contacts a heat source, a head body 24 that has ejection holes for ejecting liquid, a supply pipe 31 that supplies liquid to the head body 24, and a heat sink.
- a box-shaped body 45 is provided between the plate 21 and the supply pipe 31 , includes a shielding portion positioned apart from the heat dissipation plate 21 and the supply pipe 31 , and surrounds the heat dissipation plate 21 . As a result, the liquid can be stably ejected.
- the ejection head structure 80 includes the liquid ejection head 8 described above and a frame 50 fixing the liquid ejection head 8 .
- the shielding part 40 also serves as part of the frame 50 . This increases the degree of freedom in designing the liquid ejection head 8 .
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Abstract
Description
まず、図1および図2を参照して実施形態に係る記録装置の一例であるプリンタ1の概要について説明する。図1および図2は、実施形態に係るプリンタの説明図である。具体的には、図1は、プリンタ1の概略的な側面図であり、図2は、プリンタ1の概略的な平面図である。実施形態に係るプリンタ1は、たとえば、カラーインクジェットプリンタである。
次に、図3、図4を参照して実施形態に係る液体吐出ヘッド8の構成について説明する。図3は、実施形態に係る液体吐出ヘッドの要部の構成を示す平面図である。図4は、図3に示す液体吐出ヘッドの側面図である。
実施形態に係る液体吐出ヘッド8の各種変形例について、図5~図12を参照しながら説明する。図5は、実施形態の変形例1に係る液体吐出ヘッドの要部の構成を示す平面図である。図6は、図5に示す液体吐出ヘッドの側面図である。なお、以下の各種変形例では、実施形態と同一の部位には同一の符号を付し、重複する説明を省略する。
4 塗布機
6 搬送ローラ(搬送部の一例)
8 液体吐出ヘッド
10 乾燥機
14 制御部
21 放熱板
22 リザーバ
23 流路部材
24 ヘッド本体
31 供給管
32 回収管
40 遮蔽部
45 箱状体
50 フレーム
Claims (11)
- 発熱源に接触する放熱板と、
液体を吐出する吐出孔を有するヘッド本体と、
前記ヘッド本体に前記液体を供給する供給管と、
前記放熱板と前記供給管との間に設けられ、前記放熱板および前記供給管から離れて位置する遮蔽部と
を備える液体吐出ヘッド。 - 前記ヘッド本体から前記液体を回収する回収管
をさらに備え、
前記放熱板と前記回収管との間には、遮蔽部が位置しない
請求項1に記載の液体吐出ヘッド。 - 前記遮蔽部は、平面視で屈曲または湾曲している
請求項1または2に記載の液体吐出ヘッド。 - 前記遮蔽部の放射率は、前記放熱板の放射率よりも低い
請求項1~3のいずれか1つに記載の液体吐出ヘッド。 - 前記遮蔽部の放射率は、放熱板側の方が供給管側よりも高い
請求項1~4のいずれか1つに記載の液体吐出ヘッド。 - 前記遮蔽部の前記ヘッド本体からの高さは、前記放熱板の前記ヘッド本体からの高さよりも高い
請求項1~5のいずれか1つに記載の液体吐出ヘッド。 - 発熱源に接触する放熱板と、
液体を吐出する吐出孔を有するヘッド本体と、
前記ヘッド本体に前記液体を供給する供給管と、
前記放熱板と前記供給管との間に設けられ、前記放熱板および前記供給管から離れて位置する遮蔽部を含み、前記放熱板を包囲する箱状体と
を備える吐出ヘッド構造体。 - 請求項1~6のいずれか1つに記載の液体吐出ヘッドと、
前記液体吐出ヘッドを固定するフレームと
を備え、
前記遮蔽部は、前記フレームの一部を兼ねている
吐出ヘッド構造体。 - 請求項7または8に記載の吐出ヘッド構造体と、
前記吐出ヘッド構造体に対して記録媒体を搬送する搬送部と
を備える記録装置。 - 請求項7または8に記載の吐出ヘッド構造体と、
記録媒体にコーティング剤を塗布する塗布機と
を備える記録装置。 - 請求項7または8に記載の吐出ヘッド構造体と、
記録媒体を乾燥させる乾燥機と
を備える記録装置。
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CN202280025208.1A CN117120267A (zh) | 2021-03-30 | 2022-03-30 | 液体喷头、喷头结构体及记录装置 |
US18/552,901 US20240181775A1 (en) | 2021-03-30 | 2022-03-30 | Liquid discharge head, discharge head structure, and recording device |
EP22781125.4A EP4316852A1 (en) | 2021-03-30 | 2022-03-30 | Liquid discharge head, discharge head structure, and recording device |
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Citations (7)
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JP2008290407A (ja) * | 2007-05-28 | 2008-12-04 | Brother Ind Ltd | 液滴吐出装置 |
JP2014195954A (ja) | 2013-03-29 | 2014-10-16 | 京セラ株式会社 | 液体吐出ヘッド、およびそれを用いた記録装置 |
JP2014223801A (ja) * | 2013-04-26 | 2014-12-04 | 京セラ株式会社 | 液体吐出ヘッドおよび記録装置 |
US20180215146A1 (en) * | 2015-10-30 | 2018-08-02 | Hewlett-Packard Development Company, L.P. | Fluid ejection device with a fluid recirculation channel |
JP2019051715A (ja) * | 2014-12-25 | 2019-04-04 | 京セラ株式会社 | 液体吐出ヘッド、および記録装置 |
JP2019136891A (ja) * | 2018-02-07 | 2019-08-22 | 株式会社東芝 | 液体吐出ヘッド |
JP2021014047A (ja) * | 2019-07-11 | 2021-02-12 | 京セラ株式会社 | 液体吐出ヘッドおよび記録装置 |
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- 2022-03-30 JP JP2023511495A patent/JPWO2022210915A1/ja active Pending
- 2022-03-30 WO PCT/JP2022/016097 patent/WO2022210915A1/ja active Application Filing
- 2022-03-30 CN CN202280025208.1A patent/CN117120267A/zh active Pending
- 2022-03-30 US US18/552,901 patent/US20240181775A1/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2008290407A (ja) * | 2007-05-28 | 2008-12-04 | Brother Ind Ltd | 液滴吐出装置 |
JP2014195954A (ja) | 2013-03-29 | 2014-10-16 | 京セラ株式会社 | 液体吐出ヘッド、およびそれを用いた記録装置 |
JP2014223801A (ja) * | 2013-04-26 | 2014-12-04 | 京セラ株式会社 | 液体吐出ヘッドおよび記録装置 |
JP2019051715A (ja) * | 2014-12-25 | 2019-04-04 | 京セラ株式会社 | 液体吐出ヘッド、および記録装置 |
US20180215146A1 (en) * | 2015-10-30 | 2018-08-02 | Hewlett-Packard Development Company, L.P. | Fluid ejection device with a fluid recirculation channel |
JP2019136891A (ja) * | 2018-02-07 | 2019-08-22 | 株式会社東芝 | 液体吐出ヘッド |
JP2021014047A (ja) * | 2019-07-11 | 2021-02-12 | 京セラ株式会社 | 液体吐出ヘッドおよび記録装置 |
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JPWO2022210915A1 (ja) | 2022-10-06 |
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