JP2005199430A - Inkjet recording apparatus - Google Patents

Inkjet recording apparatus Download PDF

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Publication number
JP2005199430A
JP2005199430A JP2004004894A JP2004004894A JP2005199430A JP 2005199430 A JP2005199430 A JP 2005199430A JP 2004004894 A JP2004004894 A JP 2004004894A JP 2004004894 A JP2004004894 A JP 2004004894A JP 2005199430 A JP2005199430 A JP 2005199430A
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ink
nozzle plate
recording apparatus
nozzle
jet recording
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Tadao Matsuda
忠生 松田
Yoshiharu Takizawa
芳治 滝沢
Akira Miyao
明 宮尾
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Hitachi Appliances Inc
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Hitachi Home and Life Solutions Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet recording apparatus in which a passage can be easily precisely worked into a target size in nozzle plate working, and ink particles can be formed stably. <P>SOLUTION: A nozzle plate 31 of the inkjet recording apparatus is manufactured through a step of opening and working a cylindrical hole part 37 to be the passage in the nozzle plate by a drill; and a step of inserting a punch 105 from the cylindrical hole part side subjected to the hole opening and working, and press working a cylindrical hole to be an ink jetting end. Moreover, the nozzle plate has a projected and dented shape at a plurality of parts of the ink jetting end surface. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、ノズルよりインクを噴出し印字を行なうインクジェット記録装置に関する。   The present invention relates to an ink jet recording apparatus that performs printing by ejecting ink from nozzles.

従来のインクジェット記録装置のノズルに関しては特開平１０−２２６０７０号公報に記載されているものがある。これは、一枚の金属プレートにパンチと該パンチの円柱部の径より大きい径のダイ孔を有する金型とを使用して、プレス加工により円柱孔部とよりなるノズルめくら孔と、ダイ孔内に押し出されたダボを成形するノズルめくら孔成形工程と、上記ダボを除去してノズルめくら孔を貫通したノズル孔とするダボ除去工程と、上記ノズル孔開口部の縁のバリを取るバリ取り工程によりノズル板を製造していた。   As for the nozzles of the conventional ink jet recording apparatus, there is one described in Japanese Patent Laid-Open No. 10-222070. This is because, using a punch on one metal plate and a die having a die hole having a diameter larger than the diameter of the cylindrical portion of the punch, a nozzle blind hole consisting of a cylindrical hole portion by press working, and a die hole Nozzle blind hole forming process for forming dowels extruded into the nozzle, dowel removing process for removing the dowels and forming nozzle holes penetrating the nozzle blind holes, and deburring the edges of the nozzle hole openings. The nozzle plate was manufactured by the process.

特開平１０−２２６０７０号公報JP 10-2226070 A

インクジェット記録装置では、インクをノズルプレートに対して直角方向にまっすぐ噴出させることが重要である。そのためには、インクの流れに乱れを発生させないように、流路を精密に加工することが必要である。   In an ink jet recording apparatus, it is important to eject ink straight in a direction perpendicular to the nozzle plate. For this purpose, it is necessary to precisely process the flow path so as not to disturb the ink flow.

上記従来技術ではプレス加工をする際、寸法基準面を設けるが基準面を広い範囲で精密加工する必要があり、流路を精密に加工する作業が困難になり、結果インクの流れに乱れが生じ、インク粒子形成の安定性を確保できない問題があった。   In the above prior art, a dimension reference surface is provided when pressing, but it is necessary to precisely process the reference surface over a wide range, which makes it difficult to precisely process the flow path, resulting in disturbance of the ink flow. There is a problem that the stability of ink particle formation cannot be ensured.

本発明は、容易に目的の寸法に流路を精密加工することを可能にし、安定したインク粒子形成が可能となるインクジェット記録装置を提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide an ink jet recording apparatus that can easily precisely process a flow path to a target dimension and can stably form ink particles.

上記目的を達成するために、本発明によるインクジェット記録装置はインクに振動を加える加振部を有するボディとボディに脱着可能な単一の金属部材からなるノズルプレートとを備え、ノズルプレートはノズルプレートに流路となる円柱穴部をドリルで穴開け加工するステップと、パンチをその穴開け加工した円柱穴部側から挿入し、インク噴出端となる円柱穴部をプレス加工するステップとを経て製造し、更に前記ノズルプレートはインク噴出端表面の複数部に凹凸形状を有する構造とすることで目的を達成できる。   In order to achieve the above object, an ink jet recording apparatus according to the present invention includes a body having a vibration unit that vibrates ink and a nozzle plate made of a single metal member that can be attached to and detached from the body. The nozzle plate is a nozzle plate. Manufacturing is performed through a step of drilling a cylindrical hole portion to be a flow path in a drill, and a step of pressing a cylindrical hole portion to be an ink ejection end by inserting a punch from the drilled cylindrical hole side. In addition, the nozzle plate can achieve the object by having a structure having irregularities in a plurality of portions on the surface of the ink ejection end.

本発明によれば、容易に目的の寸法に流路を精密加工することを可能にし、安定したインク粒子形成が可能となる。   According to the present invention, it is possible to easily process a flow path to a desired dimension easily, and stable ink particle formation is possible.

以下、本発明の実施形態について図面に従って説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図６は本発明によるインクジェット記録装置の概観図である。インクジェット記録装置は制御系・循環系を収納した本体６００、インクを噴出し粒子を作成するノズルを有する印字ヘッド６１０、及び本体６００と印字ヘッド６１０の循環系と制御系を結ぶケーブル６２０を備えて構成されている。本体６００には、ユーザが印字内容や印字仕様等の入力及び、制御内容や装置運転状況等の表示が可能な液晶パネル６３０がある。印字ヘッド６１０はステンレス製のカバーで覆われており、その内部にはインク粒子を作成し、インク粒子の飛翔を制御する印字部が収められている。カバー底面に設けられた穴６１５は、インク粒子が通るためのものである。   FIG. 6 is a schematic view of an ink jet recording apparatus according to the present invention. The ink jet recording apparatus includes a main body 600 containing a control system / circulation system, a print head 610 having nozzles that eject ink and create particles, and a cable 620 that connects the circulation system of the main body 600 and the print head 610 to the control system. It is configured. The main body 600 includes a liquid crystal panel 630 on which a user can input print contents and print specifications, and display control contents and apparatus operating conditions. The print head 610 is covered with a stainless steel cover, and a printing unit for creating ink particles and controlling the flying of the ink particles is housed in the print head 610. The hole 615 provided on the bottom surface of the cover is for the passage of ink particles.

次に、本体６００の内部構造について図７を用いて説明する。本体６００の上部には制御基盤６４０等の電気部品が配置されている。本体下部６８０には電磁弁６５０、ポンプ２等の循環系制御部品が配置されており、ノズルに供給するインクを貯めたインク容器１が収められている。   Next, the internal structure of the main body 600 will be described with reference to FIG. Electrical components such as a control board 640 are arranged on the upper part of the main body 600. Circulating system control components such as an electromagnetic valve 650 and a pump 2 are arranged in the lower main body 680, and an ink container 1 storing ink to be supplied to the nozzles is stored.

次にインクジェット記録装置のインク循環系と印字部の概略構成について図８を用いて説明する。インク供給経路２１は、インクを貯めておくインク容器1、インクを圧送するポンプ２、インク圧力を調整する調圧弁３、供給インクの圧力を表示する圧力計４、インクに混入する不純物をろ過するフィルタ５から成りノズルヘッド６にインクを供給する。帯電電極７には、記録信号源が接続されており、帯電電極７に記録信号電圧を印加することによって、ノズルヘッド６より規則的に噴射するインク粒子８を帯電する。上部偏向電極９には高圧電源が接続され、下部偏向電極１０は接地されている。それにより、上部偏向電極９と下部偏向電極１０との間に静電界を形成し、帯電したインク粒子８はその帯電量に応じて偏向されて飛翔し、記録対に付着し印字を行う。インク回収経路２２は、ガター１１、フィルタ１２、回収ポンプ１４からなり、帯電電極７で帯電されなかった記録に関与しないインク粒子８を回収し、インク容器１は戻しインクを再利用する。   Next, a schematic configuration of the ink circulation system and the printing unit of the ink jet recording apparatus will be described with reference to FIG. The ink supply path 21 is an ink container 1 that stores ink, a pump 2 that pumps ink, a pressure regulating valve 3 that adjusts ink pressure, a pressure gauge 4 that displays the pressure of the supplied ink, and filters impurities mixed in the ink. Ink is supplied to the nozzle head 6 including the filter 5. A recording signal source is connected to the charging electrode 7. By applying a recording signal voltage to the charging electrode 7, the ink particles 8 ejected regularly from the nozzle head 6 are charged. A high voltage power source is connected to the upper deflection electrode 9, and the lower deflection electrode 10 is grounded. As a result, an electrostatic field is formed between the upper deflection electrode 9 and the lower deflection electrode 10, and the charged ink particles 8 are deflected in accordance with the amount of charge and fly, adhere to the recording pair, and perform printing. The ink recovery path 22 includes a gutter 11, a filter 12, and a recovery pump 14, and recovers ink particles 8 that are not charged by the charging electrode 7 and are not involved in recording, and the ink container 1 reuses the returned ink.

次にノズルヘッド６について図１を用いて説明する。ノズルヘッド６は、加振部２９とボディ３０とノズルプレート３１とを備え構成されている。ノズルプレート３１はねじ２８によりボディ３０に固定されている。ボディ３０とノズルプレート３１の間にはインク室３６が形成されており、インク室３６には側方のインク供給経路２１からインクが導入される。ボディ３０とノズルプレート３１の間にはＯリング２６を設け、インク室３６からからのインク漏れを防止している。インク室３６に導入されたインクは、ノズルプレート３１の内部に設けられた円柱穴部３７を通り、ノズル穴４０より噴出する。加振部２９は、圧電素子３２とボディ３０に設けたダイヤフラム３６からなる。圧電素子３２励振源２７により一定周期で振動され、ダイヤフラム３６を介してインクを加振する。   Next, the nozzle head 6 will be described with reference to FIG. The nozzle head 6 includes a vibration unit 29, a body 30, and a nozzle plate 31. The nozzle plate 31 is fixed to the body 30 by screws 28. An ink chamber 36 is formed between the body 30 and the nozzle plate 31, and ink is introduced into the ink chamber 36 from the side ink supply path 21. An O-ring 26 is provided between the body 30 and the nozzle plate 31 to prevent ink leakage from the ink chamber 36. The ink introduced into the ink chamber 36 passes through a cylindrical hole portion 37 provided in the nozzle plate 31 and is ejected from the nozzle hole 40. The vibration unit 29 includes a piezoelectric element 32 and a diaphragm 36 provided on the body 30. The piezoelectric element 32 is vibrated at a constant period by the excitation source 27 and vibrates the ink through the diaphragm 36.

次に、図２、図３、図４を用いてノズルプレート３１の加工手順の詳細に付いて説明する。   Next, details of the processing procedure of the nozzle plate 31 will be described with reference to FIGS. 2, 3, and 4.

図２はノズルプレート３１のノズル穴４０を加工する前の拡大断面図である。円柱穴部３７ドリルによって穴あけ加工をしている。   FIG. 2 is an enlarged cross-sectional view before the nozzle hole 40 of the nozzle plate 31 is processed. Drilling is performed with a cylindrical hole 37 drill.

図３はノズル穴４０を成形する工程を示す。円柱穴部３７にノズル穴４０を成形するパンチ１０５を挿入し、パンチ１０５の先端が加工基準面１０２よりインク噴出方向に出張る寸法までプレスで成形する。ノズル穴４０はノズルプレート３１が塑性変形するため、まだこの段階では貫通していない。ここで、流路を加工する際、前記したように安定したインク粒子形成を得るには、流路を精密に加工することが必要不可欠となる。ノズルプレート３１の加工基準面１０２を加工治具１０３に当て加工位置基準とする。このプレスをする際の加工基準面は加工寸法を安定させる上で非常に重要になり、極力、平面度を高くする必要がある。ここで、加工基準面１０２の段差が無くノズルプレート３１のインク噴出方向表面１０４が加工基準面となった場合、広い範囲で平面度を高くする必要が生じ、加工が非常に困難なものとなる。目的の平面度が得られなければ安定したインク粒子形成は不可能となり、インクジェット記録装置としての機能が果たせなくなる。そこで加工基準面１０２を、インク噴出方向表面１０４から限られた小面積を出張らせ、その小面積を精密加工し加工基準面とすれば平面度の高い基準面が安定して製作可能になり、結果、精密な流路形状が安定して得ることが可能になる。   FIG. 3 shows a process of forming the nozzle hole 40. The punch 105 for forming the nozzle hole 40 is inserted into the cylindrical hole portion 37, and the tip of the punch 105 is formed with a press to a dimension that makes a business trip from the processing reference plane 102 in the ink ejection direction. Since the nozzle plate 31 is plastically deformed, the nozzle hole 40 has not yet penetrated at this stage. Here, when the flow path is processed, it is indispensable to precisely process the flow path in order to obtain stable ink particle formation as described above. The processing reference surface 102 of the nozzle plate 31 is applied to the processing jig 103 and used as a processing position reference. The processing reference surface at the time of pressing is very important for stabilizing the processing dimensions, and it is necessary to increase the flatness as much as possible. Here, when there is no step on the processing reference surface 102 and the ink ejection direction surface 104 of the nozzle plate 31 becomes the processing reference surface, it is necessary to increase the flatness over a wide range, and the processing becomes very difficult. . If the desired flatness cannot be obtained, stable ink particle formation is impossible, and the function as an ink jet recording apparatus cannot be achieved. Therefore, if the processing reference surface 102 is traveled in a limited small area from the surface 104 in the ink ejection direction, and the small area is precisely processed to be a processing reference surface, a reference surface with high flatness can be manufactured stably. As a result, a precise channel shape can be stably obtained.

図４は、加工の最終工程であり、プレスによって出張った塑性変形部１０６を研磨やエッチングにより加工基準面１０２の位置まで取り除く。ノズル穴４０は、加工基準面１０２よりインク噴出方向に出張る寸法までプレスしているため、塑性変形部１０６を取り除けばノズル穴４０が貫通する。   FIG. 4 shows the final process of processing, and the plastic deformation portion 106 that has traveled by press is removed to the position of the processing reference surface 102 by polishing or etching. Since the nozzle hole 40 is pressed to a dimension that makes a business trip in the ink ejection direction from the processing reference surface 102, the nozzle hole 40 penetrates if the plastic deformation portion 106 is removed.

図５は、ノズルプレート３１の完成形状の断面図である。図示上下部にある加工基準面１０２もノズルプレート３１を加工する際の同一の高さを持つ、位置出し基準面であり複数部の基準面を持たせノズルプレート３１を加工治具にセットする際に安定性を持たせている。   FIG. 5 is a sectional view of the completed shape of the nozzle plate 31. The processing reference planes 102 at the upper and lower parts in the figure are also the positioning reference planes having the same height when the nozzle plate 31 is processed, and when the nozzle plate 31 is set on the processing jig with a plurality of reference planes. Is made stable.

ノズルヘッドの断面図。Sectional drawing of a nozzle head. ノズルプレートのノズル穴を加工する前の拡大断面図。The expanded sectional view before processing the nozzle hole of a nozzle plate. ノズル穴を成形する工程を示すノズルプレートの断面図。Sectional drawing of the nozzle plate which shows the process of shape | molding a nozzle hole. ノズルプレート加工の最終工程の断面図。Sectional drawing of the last process of nozzle plate processing. ノズルプレートの完成形状の断面図。Sectional drawing of the completed shape of a nozzle plate. インクジェット記録装置の概観図。1 is a schematic view of an ink jet recording apparatus. インクジェット記録装置の本体内部を表わす図。The figure showing the inside of the main body of an inkjet recording device. インクジェット記録装置のインク循環図。FIG. 3 is an ink circulation diagram of the ink jet recording apparatus.

符号の説明Explanation of symbols

１…インク容器、２…ポンプ、３…調圧弁、４…圧力計、５…フィルタ、６…ノズルヘッド、７…帯電電極、８…インク粒子、９…上部偏向電極、１０…下部偏向電極、１１…ガター、１２…フィルタ、１４…回収ポンプ、２１…インク供給経路、２６…Ｏリング、２７…励振源、２８…ねじ、２９…加振部、３０…ボディ、３１…ノズルプレート、３６…インク室、３７…円柱穴部、４０…ノズル穴、１０２…加工基準面、１０３…加工治具、１０４…ノズルプレート表面、１０５…パンチ、１０６…塑性変形部、６００…本体、６１０…印字ヘッド、６２０…ケーブル、６３０…液晶パネル、６１５…穴、６４０…制御基板、６５０…電磁弁、６８０…本体下部。
DESCRIPTION OF SYMBOLS 1 ... Ink container, 2 ... Pump, 3 ... Pressure regulating valve, 4 ... Pressure gauge, 5 ... Filter, 6 ... Nozzle head, 7 ... Charging electrode, 8 ... Ink particle, 9 ... Upper deflection electrode, 10 ... Lower deflection electrode, DESCRIPTION OF SYMBOLS 11 ... Gutter, 12 ... Filter, 14 ... Collection pump, 21 ... Ink supply path, 26 ... O-ring, 27 ... Excitation source, 28 ... Screw, 29 ... Excitation part, 30 ... Body, 31 ... Nozzle plate, 36 ... Ink chamber, 37 ... cylindrical hole, 40 ... nozzle hole, 102 ... processing reference surface, 103 ... processing jig, 104 ... surface of nozzle plate, 105 ... punch, 106 ... plastic deformation part, 600 ... main body, 610 ... print head , 620 ... Cable, 630 ... Liquid crystal panel, 615 ... Hole, 640 ... Control board, 650 ... Solenoid valve, 680 ... Lower part of the main body.

Claims (4)

ノズルよりインクを噴出して印字を行うインクジェット記録装置においてインクに振動を与える加振部を有するボディと前記ボディに脱着可能な金属部材からなるノズルプレートとを備え、前記ノズルプレートはインク噴出端表面に凹凸形状を構成したノズルを有することを特徴としたインクジェット記録装置。   In an ink jet recording apparatus that performs printing by ejecting ink from nozzles, the ink jet recording apparatus includes a body having a vibration unit that vibrates ink, and a nozzle plate made of a metal member that can be attached to and detached from the body, and the nozzle plate has an ink ejection end surface An ink jet recording apparatus comprising a nozzle having a concavo-convex shape. 請求項１に記載のインクジェット記録装置において前記ノズルプレートは、前記凹凸形状の凸部に平面を有したノズルを用いたことを特徴としたインクジェット記録装置。   2. The ink jet recording apparatus according to claim 1, wherein the nozzle plate uses a nozzle having a flat surface on the concave and convex portion. 請求項１、および請求項２に記載のインクジェット記録装置において、前記ノズルプレートの凸形状部を、ノズルプレートにインクの流路を作成する際の加工基準面とするノズルを有することを特徴としたインクジェット記録装置。   3. The ink jet recording apparatus according to claim 1, further comprising: a nozzle having a convex portion of the nozzle plate as a processing reference plane when an ink flow path is created in the nozzle plate. Inkjet recording device. 請求項１から請求項３に記載のインクジェット記録装置において、前記ノズルプレートのノズルから噴出したインク粒子を帯電する帯電電極と、帯電したインク粒子を偏向するための偏向電極を備えることを特徴とするインクジェット記録装置。
4. The ink jet recording apparatus according to claim 1, further comprising: a charging electrode for charging ink particles ejected from the nozzles of the nozzle plate; and a deflection electrode for deflecting the charged ink particles. Inkjet recording device.
JP2004004894A 2004-01-13 2004-01-13 Inkjet recording apparatus Pending JP2005199430A (en)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
US8869400B2 (en) 2006-10-25 2014-10-28 Kabushiki Kaisha Toshiba Method for manufacturing a nozzle plate and a droplet dispensing head
CN109454994A (en) * 2018-11-12 2019-03-12 上海美创力罗特维尔电子机械科技有限公司 A kind of clamped-in style crystal oscillator component of monolithic piezoelectric crystal

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JPH11351356A (en) * 1998-06-10 1999-12-24 Honda Motor Co Ltd Disklike raw material
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Cited By (3)

* Cited by examiner, † Cited by third party
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US8869400B2 (en) 2006-10-25 2014-10-28 Kabushiki Kaisha Toshiba Method for manufacturing a nozzle plate and a droplet dispensing head
CN109454994A (en) * 2018-11-12 2019-03-12 上海美创力罗特维尔电子机械科技有限公司 A kind of clamped-in style crystal oscillator component of monolithic piezoelectric crystal
CN109454994B (en) * 2018-11-12 2023-10-20 上海美创力罗特维尔电子机械科技有限公司 Clamping type crystal oscillator assembly of monolithic piezoelectric crystal

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