JPH01148561A - Ink jet head - Google Patents
Ink jet headInfo
- Publication number
- JPH01148561A JPH01148561A JP30713287A JP30713287A JPH01148561A JP H01148561 A JPH01148561 A JP H01148561A JP 30713287 A JP30713287 A JP 30713287A JP 30713287 A JP30713287 A JP 30713287A JP H01148561 A JPH01148561 A JP H01148561A
- Authority
- JP
- Japan
- Prior art keywords
- ink
- flow path
- heat
- plate
- substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000758 substrate Substances 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000012943 hotmelt Substances 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 10
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 abstract description 6
- 229910002113 barium titanate Inorganic materials 0.000 abstract description 6
- 239000004065 semiconductor Substances 0.000 abstract description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052804 chromium Inorganic materials 0.000 abstract description 2
- 239000011651 chromium Substances 0.000 abstract description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 239000010949 copper Substances 0.000 abstract description 2
- 229910052759 nickel Inorganic materials 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
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
- B41J2/17—Ink jet characterised by ink handling
- B41J2/195—Ink jet characterised by ink handling for monitoring ink quality
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はホットメルトインクを記録液とするカイザー型
オンもデマンド方式インクジェットヘッドに関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a Kaiser-type on-demand type inkjet head that uses hot melt ink as a recording liquid.
加熱により低粘度の液相状態にしてインク吐出するイン
クをホットメルトインクと言うことができるが、前記ホ
ットメルトインクを吐出噴射させるインクジェットヘッ
ドにおいては、流路内のインクの温度勾配による特性変
化を抑えるために流路内のインクを一様に加熱してやる
必要がある。Ink that is ejected by heating to a low-viscosity liquid phase state can be called hot-melt ink.In the inkjet head that ejects the hot-melt ink, changes in characteristics due to the temperature gradient of the ink in the flow path are avoided. In order to suppress this, it is necessary to uniformly heat the ink within the flow path.
しかし、一般に流路形状が複雑なカイザー型オン・デマ
ンド方式のインクジェットに、単に流路基板の周りに発
熱素子を配置しただけでは、流路内のインクを温度勾配
なく加熱することが困難であるばかりでなく、熱を必要
としない部分に余計な熱エネルギーを与えることになる
。However, in Kaiser-type on-demand inkjet, which generally has a complicated flow path shape, it is difficult to heat the ink in the flow path without a temperature gradient by simply placing heating elements around the flow path substrate. Not only that, but it also gives extra heat energy to parts that don't need heat.
そこで、本発明はかかる従来技術の欠点をな（すもので
、その目的とするところは流路内のインクの温度勾配を
減らし、流路内のインクの加熱を効率良くするインクジ
ェットヘッドを提供することにある。SUMMARY OF THE INVENTION Therefore, the present invention overcomes the drawbacks of the prior art, and its purpose is to provide an inkjet head that reduces the temperature gradient of the ink within the flow path and efficiently heats the ink within the flow path. There is a particular thing.
本発明によるインクジェットヘッドは、ホットメルトイ
ンクを記録液とするカイザー型オン・デマンド方式イン
クジェットヘッドのインク備準室からノズルに至るまで
の厚さが１ｃｍ以内であるインク流路基板と、該基板の
少なくとも一側面に接合され１０Ｗ／ｍ−に以上の熱伝
導率を有する材料から成る板状加熱部材と、該加熱部材
に接する発熱素子とで構成されることを特徴とする。The inkjet head according to the present invention is a Kaiser-type on-demand type inkjet head that uses hot melt ink as a recording liquid. It is characterized by comprising a plate-shaped heating member made of a material having a thermal conductivity of 10 W/m or more and bonded to at least one side, and a heating element in contact with the heating member.
本発明の上記の構成によれば、前記加熱部材が少なくと
も１０Ｗ／ｍＩＩＫの熱伝導率を有する材料からなり、
流路基板に沿って板状に接合されているため発熱素子で
発生した熱は均等に流路基板に伝わり、インクの温度勾
配を減少させることができる。さらに、インク流路基板
の厚さを１ｃｍ以内とすることによって、流路基板の熱
容量が小さくなり、流路基板中を移動する熱量のうち、
わずかの部分が流路基板に吸収され残りの大部分の熱は
インクへと伝えられる結果、発熱素子で発生した熱は効
率よくインクへ伝導する。According to the above configuration of the present invention, the heating member is made of a material having a thermal conductivity of at least 10 W/mIIK,
Since the heat generating element is connected in a plate shape along the flow path substrate, the heat generated by the heating element is evenly transmitted to the flow path substrate, and the temperature gradient of the ink can be reduced. Furthermore, by setting the thickness of the ink flow path substrate to within 1 cm, the heat capacity of the flow path substrate is reduced, and out of the amount of heat that moves through the flow path substrate, less
A small portion of the heat is absorbed by the channel substrate and most of the remaining heat is transferred to the ink, so that the heat generated by the heating element is efficiently transferred to the ink.
以下、図面を用いて詳細に説明する。 Hereinafter, it will be explained in detail using the drawings.
第１図は本発明の実施例を示す要部の構成図で、第２図
は同断面図であり、インク流路は射出成形によるプラス
デック基板３と、基板４を融着して形成される。インク
タンクからのインクはインク供給口１０よりインク準備
室７に供給され各圧力室８を通り、圧電素子６に印加さ
れる電気記録信号によって、ノズル９から吐出される。FIG. 1 is a configuration diagram of the main parts showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the same, in which the ink flow path is formed by fusing a plus deck substrate 3 and a substrate 4 by injection molding. Ru. Ink from the ink tank is supplied to the ink preparation chamber 7 through the ink supply port 10, passes through each pressure chamber 8, and is ejected from the nozzle 9 in response to an electrorecording signal applied to the piezoelectric element 6.
発熱素子であるチタン酸バリウム系半導体１及び、イン
ク流路基板３と前記チタン酸バリウム系半導体１の間に
接合された板状加熱部材であるアルミニウム板２は、イ
ンク流路基板３上の流路形状に合致した形状を仔してい
る。A barium titanate semiconductor 1 which is a heating element and an aluminum plate 2 which is a plate-shaped heating member joined between an ink flow path substrate 3 and the barium titanate semiconductor 1 are connected to the ink flow path substrate 3. It has a shape that matches the road shape.
インク流路基板の厚さについては、本発明者の実験結果
によると、インク流路基板の厚さが薄いほど熱容量が小
さくなり熱伝導性も良くなって迅速かつ無駄なくインク
へと熱は伝導［７、インク流路基板の厚さを１ｃｍ以上
とした場合には、熱が均等にインクへと伝わらないこと
から、インク流路基板の厚さはできる限り薄い方が好ま
しい。Regarding the thickness of the ink channel substrate, according to the inventor's experimental results, the thinner the ink channel substrate, the smaller the heat capacity and the better the thermal conductivity, allowing heat to be quickly and efficiently transferred to the ink. [7. When the thickness of the ink flow path substrate is 1 cm or more, heat is not evenly transmitted to the ink, so it is preferable that the thickness of the ink flow path substrate be as thin as possible.
以上の理由から流路基板３の厚さを１ｃｍ以内、本実施
例では好ましい厚さとして１ｍｍとすることにより、チ
タン酸バリウム系半導体１で発生シタ熱は、熱伝導率の
大きなアルミニウム板２と前記インク流路基板３を介し
て、効率の良い熱伝導状態でインクへと伝わるため、加
える熱エネルギーが少なくて済む。また、発熱素子のチ
タン酸バリウム系半導゛体１とアルミニウム板２がイン
ク流路基板に沿い流路形状と合致しているため、熱は均
等にインク流路内のインクへと伝わりインクの温度勾配
を減少させるととができる。For the above reasons, by setting the thickness of the channel substrate 3 to within 1 cm, preferably 1 mm in this example, the heat generated in the barium titanate semiconductor 1 can be transferred to the aluminum plate 2 with high thermal conductivity. Since the heat is transmitted to the ink via the ink flow path substrate 3 in an efficient heat conduction state, less heat energy can be applied. In addition, since the barium titanate semiconductor 1 and aluminum plate 2 of the heating element are aligned with the ink flow path substrate and match the shape of the flow path, heat is evenly transmitted to the ink in the ink flow path and the ink is heated. This can be achieved by reducing the temperature gradient.
発熱素子１はチタン酸バリウム系半導体以外にニクロム
線等の利用が可能である。The heating element 1 can be made of a nichrome wire or the like other than a barium titanate semiconductor.
板状加熱部材２の材質はアルミニウム以外では、銅、ニ
ッケル、クロム等、熱伝導率が１０ｗ／ｍ−に以上の良
熱伝導性材料が好ましい。In addition to aluminum, the plate-like heating member 2 is preferably made of a material with good thermal conductivity, such as copper, nickel, or chromium, with a thermal conductivity of 10 w/m or more.
また第２図中、振動板５に発熱素子を接合して流路内の
インクを上面からも加熱すれば、インクの温度勾配をさ
らに小さくすることが可能である。Further, as shown in FIG. 2, if a heating element is connected to the diaphragm 5 to heat the ink in the flow path from the upper surface as well, it is possible to further reduce the temperature gradient of the ink.
第３図は本発明における他の実施例のヘッドの断面図で
あって、インク流路基板３，１１が発熱素子１とアルミ
ニウム板２をはさんで接合されている。本実施例ではア
ルミニウム板２からインク流路３，１１へと熱か伝導す
るため、前実施例と異なり、発熱素子１で発生した熱は
すべてアルミニウム板２に伝わり、効率よくインクを加
熱することが可能となる。FIG. 3 is a sectional view of a head according to another embodiment of the present invention, in which ink flow path substrates 3 and 11 are joined to a heating element 1 with an aluminum plate 2 interposed therebetween. In this embodiment, heat is conducted from the aluminum plate 2 to the ink channels 3 and 11, so unlike the previous embodiment, all the heat generated by the heating element 1 is transferred to the aluminum plate 2, and the ink can be efficiently heated. becomes possible.
以上述べたように本発明によれば、インク流路基板の厚
さが１ｃｍ以内であることと、発熱素子と１０Ｗ／ｍ−
に以上の熱伝導率の材料からなる板状加熱部材が前イン
ク流路基板に接合されていることにより、発熱素子で発
生した熱を効率よくインクに伝え流路内のインクの温度
勾配を小さく抑えることができる。As described above, according to the present invention, the thickness of the ink flow path substrate is within 1 cm, and the heating element is 10 W/m-
A plate-shaped heating member made of a material with a thermal conductivity higher than It can be suppressed.
更に、本発明の別の重要な効果を以下に述べる。Furthermore, another important effect of the present invention will be described below.
板状加熱部材２として剛性が高く熱伝導率の良い金属板
等をインク流路基板３の底面に接合すれば、圧電素子６
による圧力室８の底面のたわみが小さくなって、前期圧
力室底面のたわみに費やすエネルギーが低減し、その結
果、圧電素子６に印加される駆動電圧が抑えられて、駆
動回路の低コスト化が可能になるという効果がある。If a metal plate or the like with high rigidity and good thermal conductivity is bonded to the bottom surface of the ink flow path substrate 3 as the plate-shaped heating member 2, the piezoelectric element 6
The deflection of the bottom surface of the pressure chamber 8 due to this decreases, and the energy spent on deflecting the bottom surface of the pressure chamber is reduced. As a result, the drive voltage applied to the piezoelectric element 6 is suppressed, and the cost of the drive circuit can be reduced. This has the effect of making it possible.
第１図は本発明の一実施例を示すインクジェットヘッド
の構成図。
第２図は第１図に示す実施例の断面図。
第３図は他の実施例におけるヘッドの断面図。
１・・・発熱素子
２・・・アルミニウム板
３・１１・・・インク流路基板
５・・・振動板
６・・・圧電素子
７・・・インク準備室
８・・・圧力室
９・・・ノズル
第１図FIG. 1 is a configuration diagram of an inkjet head showing an embodiment of the present invention. FIG. 2 is a sectional view of the embodiment shown in FIG. 1. FIG. 3 is a sectional view of a head in another embodiment. 1... Heating element 2... Aluminum plate 3, 11... Ink flow path substrate 5... Vibration plate 6... Piezoelectric element 7... Ink preparation chamber 8... Pressure chamber 9...・Nozzle diagram 1
Claims (1)
マンド方式インクジェットヘッドのインク準備室からノ
ズルに至るまでの厚さが１ｃｍ以内であるインク流路基
板と、該基板の少なくとも一側面に接合され１０Ｗ／ｍ
・Ｋ以上の熱伝導率を有する材料から成る板状加熱部材
と、該加熱部材に接する発熱素子とで構成されることを
特徴とするインクジェットヘッド。A Kaiser-type on-demand inkjet head that uses hot-melt ink as a recording liquid has an ink channel substrate with a thickness of 1 cm or less from the ink preparation chamber to the nozzle, and a 10 W/ m
- An inkjet head comprising a plate-shaped heating member made of a material having a thermal conductivity of K or more, and a heating element in contact with the heating member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30713287A JPH01148561A (en) | 1987-12-04 | 1987-12-04 | Ink jet head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30713287A JPH01148561A (en) | 1987-12-04 | 1987-12-04 | Ink jet head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01148561A true JPH01148561A (en) | 1989-06-09 |
Family
ID=17965414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30713287A Pending JPH01148561A (en) | 1987-12-04 | 1987-12-04 | Ink jet head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01148561A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1707370A1 (en) * | 2005-03-31 | 2006-10-04 | Océ-Technologies B.V. | Inkjet printer |
| JP2006281780A (en) * | 2005-03-31 | 2006-10-19 | Oce Technologies Bv | Inkjet printer |
| JP2007090694A (en) * | 2005-09-29 | 2007-04-12 | Konica Minolta Holdings Inc | Line head and inkjet printing apparatus |
| JP2007196479A (en) * | 2006-01-25 | 2007-08-09 | Fuji Xerox Co Ltd | Liquid droplet discharging device |
| US20180147843A1 (en) * | 2016-11-29 | 2018-05-31 | Océ Holding B.V. | Print head having a chip-carrying tile |
-
1987
- 1987-12-04 JP JP30713287A patent/JPH01148561A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1707370A1 (en) * | 2005-03-31 | 2006-10-04 | Océ-Technologies B.V. | Inkjet printer |
| JP2006281780A (en) * | 2005-03-31 | 2006-10-19 | Oce Technologies Bv | Inkjet printer |
| US7481517B2 (en) | 2005-03-31 | 2009-01-27 | Oce-Technologies B.V. | Inkjet printer |
| JP2007090694A (en) * | 2005-09-29 | 2007-04-12 | Konica Minolta Holdings Inc | Line head and inkjet printing apparatus |
| JP2007196479A (en) * | 2006-01-25 | 2007-08-09 | Fuji Xerox Co Ltd | Liquid droplet discharging device |
| US20180147843A1 (en) * | 2016-11-29 | 2018-05-31 | Océ Holding B.V. | Print head having a chip-carrying tile |
| US10259223B2 (en) * | 2016-11-29 | 2019-04-16 | Océ Holding B.V. | Print head having a chip-carrying tile with stress relief plate |
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