JPH0292643A - Ink jet head - Google Patents
Ink jet headInfo
- Publication number
- JPH0292643A JPH0292643A JP24670588A JP24670588A JPH0292643A JP H0292643 A JPH0292643 A JP H0292643A JP 24670588 A JP24670588 A JP 24670588A JP 24670588 A JP24670588 A JP 24670588A JP H0292643 A JPH0292643 A JP H0292643A
- Authority
- JP
- Japan
- Prior art keywords
- wall
- shape
- deposited
- nozzle
- thermal expansion
- 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
- 239000004698 Polyethylene Substances 0.000 abstract description 6
- -1 polyethylene Polymers 0.000 abstract description 5
- 229920000573 polyethylene Polymers 0.000 abstract description 5
- 229920002799 BoPET Polymers 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 238000005452 bending Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 abstract 1
- 238000007639 printing Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 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
- B41J2/135—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
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2002/14346—Ejection by pressure produced by thermal deformation of ink chamber, e.g. buckling
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
PURPOSE:To facilitate a constitution, and to print at a high speed by varying a shape by means of thermal expansion of the surface of a wall face member upon heating of a heat generating layer. CONSTITUTION:An annular movable wall 16 of polyethylene is deposited on its outer wall with TaSiO2, 2, and coupled with an aluminum-deposited PET film 15 via conductive adhesive. One of the PET films of the wall 16 continues with a common electrode 17, and the other is composed to be applied with an electric signal. When the wall 16 is electrified, the temperature of the deposited TaSiO2 layer starts rising on the outer wall of the part 16, the polyethylene of the part 16 causes temperature difference between the outer wall and the inner wall, a bending stress acts between the outer wall and the inner wall by means of thermal expansion to alter the shape of the movable wall. When the electrification is finished, the shape of the wall is recovered to the original shape. The part surrounded by a cylindrical shape is caused by a volumetric change in this series of operations, and the variation is discharged from a nozzle 12.
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はドツトマトリクス印刷装置の印刷ヘッドに関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a print head for a dot matrix printing device.
［従来の技術］
円筒形状部材の径の変化による内部体積の変化をインク
吐出の手段として用いるインクジェットヘッドとしては
、従来より、円筒形状形成に圧電性結晶を用いたいわゆ
るグールド型ヘッドが広く知られている。[Prior Art] As an inkjet head that uses a change in the internal volume due to a change in the diameter of a cylindrical member as a means of ejecting ink, a so-called Gould type head that uses a piezoelectric crystal to form a cylindrical shape has been widely known. ing.
［発明が解決しようとする課題］
上記の如き従来技術において明らかに大きな課題となる
点は、いかにして圧電性結晶による円筒形状を製造する
かであり、さらに、いかにして歪を得るための電界印可
に必要な電極をこの円筒形の内壁面に形成するかという
点である。従来技術はこの点で製造困難であった。すな
わち歩留りを向上させ難く、多ノズルヘッドの構成が難
しいため高速印刷に遺した装置構成となり得なかった。[Problems to be Solved by the Invention] Clearly, a major problem in the prior art as described above is how to manufacture a cylindrical shape using piezoelectric crystals, and furthermore, how to obtain strain. The issue is whether to form the electrodes necessary for applying an electric field on the inner wall surface of this cylindrical shape. The conventional technology was difficult to manufacture in this respect. In other words, it was difficult to improve the yield and it was difficult to configure a multi-nozzle head, so it was not possible to create an apparatus configuration suitable for high-speed printing.
本発明はこうした従来技術の問題点を考慮して発明され
たもので、その目的とする所は、１ノズル当たりの構成
に必要な機構の簡略化により、多ノズルヘッドの構成を
容易とし、高速印刷に適した装置構成を実現することに
ある。The present invention was invented in consideration of the problems of the prior art, and its purpose is to simplify the mechanism required for the configuration of each nozzle, thereby facilitating the configuration of a multi-nozzle head and achieving high speed. The objective is to realize a device configuration suitable for printing.
［課題を解決するための手段］
本発明は、インク滴吐出のためのノズル上面のインク中
に配置した円筒形状あるいは、不完全な円筒形状の可動
壁面の内壁面あるいは外壁面に発熱層を設けた構成の印
刷ヘッドであり、前記発熱層の発熱に伴う壁面部材表面
の熱膨張により形状を変化しうる如く構成したことを特
徴とする。[Means for Solving the Problems] The present invention provides a heating layer on the inner or outer wall surface of a cylindrical or incompletely cylindrical movable wall disposed in the ink on the upper surface of a nozzle for ejecting ink droplets. The printing head is characterized in that it is configured so that its shape can be changed by thermal expansion of the surface of the wall member due to heat generation of the heat generating layer.
［作用］
本発明の上記構成によれば、ノズル上面に設けた円筒形
状を構成する部材の内壁が熱膨張した場合には内壁に囲
まれる体積は増加する。次に熱膨張状態から復帰する際
には、前述の体積増分は排除される。加熱部分が外壁側
に有っても熱歪・熱応力により円筒形状内部の体積が変
化するのは同様である。形状変化により排除された体積
の一部はノズルより吐出される。[Operation] According to the above configuration of the present invention, when the inner wall of the cylindrical member provided on the upper surface of the nozzle thermally expands, the volume surrounded by the inner wall increases. The volume increase described above is then eliminated upon return from the thermally expanded state. Similarly, even if the heated portion is on the outer wall side, the volume inside the cylindrical shape changes due to thermal distortion and thermal stress. A part of the volume removed due to the shape change is discharged from the nozzle.
［実施例］
本発明のインクジェットへ・ソドを、本実施例では第５
図の構成の印刷装置に用いた。ここで印刷用紙１は、紙
抑えローラ２．３により保持され、紙送りローラー４に
よって、矢印５の方向に搬送される。またインクジェッ
トヘッド９は、案内軸６．７により案内され、駆動モー
タ、駆動ベルトにより矢印１０の方向に位置制御される
ヘッドキャリッジ８に取り付けられている。[Example] In this example, the fifth inkjet printer of the present invention was used.
It was used in a printing device with the configuration shown in the figure. Here, the printing paper 1 is held by a paper holding roller 2.3 and is conveyed in the direction of the arrow 5 by a paper feed roller 4. The inkjet head 9 is also mounted on a head carriage 8 guided by a guide shaft 6.7 and whose position is controlled in the direction of arrow 10 by a drive motor and a drive belt.
本発明のインクジェットヘッドの構成図を第１図に示す
。ここでは４ノズル構成のヘッドとなっている。すなわ
ちノズルプレート１１の４つのノズル１２の上面に、各
々ポリエチレンの可動壁１６が位置し、保持体１３およ
び、キャビティ１４により密閉する様構成した。また本
実施例においては、環状の可動壁１６は、外径２．８ｍ
ｍ、内径２．５ｍｍのポリエチレンチューブを高さ２゜
５ｍｍとなるよう切断し、アルファベットの「Ｃ」の文
字状に切り開いた後、外壁にＴａ５ｉ０２を蒸着し、ア
ルミ蒸着ＰＥＴフィルム１５と、導電性接着剤により結
合した。環状の可動壁１６の両翼をなすアルミ蒸着ＰＥ
Ｔフィルムの一方は、アルミ板の共通電極１７に導通し
、他の一方には個々に駆動のための電気信号が加えられ
る。このノズル附近の拡大図を第２図に示し、第２図Ａ
Ａ′断面を第３図に示す。第２図をノズル上方から見る
と、第４図の様になる。ここで通電が行なわれると、可
動壁面の環状部分１６の外壁では、蒸着されたＴａ５ｉ
０２層の温度上昇が始まる。A block diagram of the inkjet head of the present invention is shown in FIG. Here, the head has a four-nozzle configuration. That is, a polyethylene movable wall 16 is located on the upper surface of each of the four nozzles 12 of the nozzle plate 11, and is configured to be sealed by a holder 13 and a cavity 14. Further, in this embodiment, the annular movable wall 16 has an outer diameter of 2.8 m.
After cutting a polyethylene tube with an inner diameter of 2.5 mm to a height of 2.5 mm and cutting it open in the shape of the letter "C", Ta5i02 was vapor-deposited on the outer wall, and an aluminum-deposited PET film 15 and conductive Bonded with adhesive. Aluminum vapor-deposited PE forming both wings of the annular movable wall 16
One side of the T film is electrically connected to the common electrode 17 of the aluminum plate, and an electric signal for driving is individually applied to the other side. An enlarged view of the vicinity of this nozzle is shown in Figure 2, and Figure 2A
A section A' is shown in FIG. When Figure 2 is viewed from above the nozzle, it looks like Figure 4. When electricity is applied here, the outer wall of the annular portion 16 of the movable wall surface is exposed to the Ta5i deposited on the outer wall.
The temperature of layer 02 begins to rise.
本実施例では、１ミリジユールのエネルギーの通電を行
ったとき、Ｔａ５ｉ０２の表面に約セッ氏４０度の温度
上昇が生じた。かかる温度上昇に際し環状部分１６を構
成するポリエチレンは、その熱伝導性が低いことにより
、外壁、内壁の間には初期的にセラ成約４０度の温度差
を生じ、熱膨張する外壁と、はぼ一定の長さを保つ内壁
の間には曲げ応力が作用する。この結果、可動壁の形状
は第４図点線の様に変化する。一方通電を終了すると、
内外壁の温度差は次第に緩和し、可動壁の形状は第４図
実線の様に復帰する。この様な一連の動作には円筒形状
に囲まれた部分の体積変化が伴い、その変化分の約４０
分の１がノズル１２より吐出される。In this example, when electricity was applied with an energy of 1 millijoule, a temperature rise of about 40 degrees Celsius occurred on the surface of Ta5i02. Due to the low thermal conductivity of the polyethylene constituting the annular portion 16, when the temperature increases, a temperature difference of approximately 40 degrees initially occurs between the outer wall and the inner wall, and the thermally expanding outer wall and the Bending stress acts between the inner walls that maintain a constant length. As a result, the shape of the movable wall changes as shown by the dotted line in FIG. On the other hand, when the power is turned off,
The temperature difference between the inner and outer walls gradually eases, and the shape of the movable wall returns to the shape shown by the solid line in FIG. This series of operations involves a change in the volume of the area surrounded by the cylindrical shape, and the change in volume is approximately 40%.
One part is ejected from the nozzle 12.
すなわち本発明のインクジェットヘッドは、１画素の印
刷要求の発生する毎に、上記のごとくの一連の「通電・
発熱・変形・復帰」の動作を行う事で、］画素の印刷に
必要となるインク滴をノズルより吐出し、この繰り返し
によりいわゆるｒドツトマトリクス」パターンを発生す
る構成の印刷装置に用いる事ができる。In other words, the inkjet head of the present invention performs the above-mentioned series of "energization and
By performing the operations of "heat generation, deformation, and recovery," the ink droplets necessary for printing pixels are ejected from the nozzle, and by repeating this process, it can be used in a printing device configured to generate a so-called "r-dot matrix" pattern. .
（発明の効果］
以上に述べた通り、本発明の構成によれば、従来のグー
ルド型に比較し１ノズル当たりの構成が簡単となる。ま
た製造上の材料についても本発明の用いる材料の方が安
価なうえに、形状寸法の管理も容易である。これら本発
明の従来品に対する優位性の他に、本発明が駆動電圧と
して高電圧を必要としない、という点が指摘できる。(Effects of the Invention) As described above, according to the configuration of the present invention, the configuration per nozzle is simpler than that of the conventional Gould type.Also, regarding the manufacturing materials, the materials used in the present invention are In addition to being inexpensive, the shape and dimensions can be easily controlled.In addition to these advantages of the present invention over conventional products, it can be pointed out that the present invention does not require a high voltage as a driving voltage.
第１図は本発明の１つの実施例の構成図。第２図は第１
図の拡大図。第３図は第２図の断面図。
第４図は第３図を上面より見た図。第５図は本発明を用
いた印刷装置の構成図。
１・・・印刷用紙。
２．３・・・紙抑えローラ。
４・・・紙送りローラ。
６．７・・・案内軸。
８・・・ヘッドキャリッジ。
９・・・ヘッド。
ｌｌ・・・ノズルプレート。
１２・・・ノズル。
１３・・・保持体。
１４・・・ヘッドキャビティ。
１５．１６・・・可動壁。
１７・・・共通電極。
以上FIG. 1 is a block diagram of one embodiment of the present invention. Figure 2 is the first
Enlarged view of the figure. FIG. 3 is a sectional view of FIG. 2. Figure 4 is a top view of Figure 3. FIG. 5 is a block diagram of a printing apparatus using the present invention. 1...Printing paper. 2.3... Paper holding roller. 4...Paper feed roller. 6.7...Guide shaft. 8...Head carriage. 9...Head. ll... Nozzle plate. 12... Nozzle. 13...Holding body. 14...Head cavity. 15.16...Movable wall. 17...Common electrode. that's all
Claims (1)
円筒形状あるいは、不完全な円筒形状の可動壁面の内壁
面あるいは外壁面に発熱層を設けた構成の印刷ヘッドで
あり、前記発熱層の発熱に伴う壁面部材表面の熱膨張に
より形状を変化しうる如く構成したことを特徴とするイ
ンクジェットヘッド。This print head has a configuration in which a heat generating layer is provided on the inner or outer wall surface of a cylindrical or incomplete cylindrical movable wall placed in the ink on the top surface of a nozzle for ejecting ink droplets, and the heat generated by the heat generating layer is An inkjet head characterized in that it is configured to be able to change its shape due to thermal expansion of the surface of a wall member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24670588A JPH0292643A (en) | 1988-09-30 | 1988-09-30 | Ink jet head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24670588A JPH0292643A (en) | 1988-09-30 | 1988-09-30 | Ink jet head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0292643A true JPH0292643A (en) | 1990-04-03 |
Family
ID=17152410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24670588A Pending JPH0292643A (en) | 1988-09-30 | 1988-09-30 | Ink jet head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0292643A (en) |
Cited By (63)
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|---|---|---|---|---|
| US6746105B2 (en) | 1997-07-15 | 2004-06-08 | Silverbrook Research Pty. Ltd. | Thermally actuated ink jet printing mechanism having a series of thermal actuator units |
| US6776476B2 (en) | 1997-07-15 | 2004-08-17 | Silverbrook Research Pty Ltd. | Ink jet printhead chip with active and passive nozzle chamber structures |
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1988
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