KR20020049716A - Maintenance structure of ink-jet print-head using ink supply valve - Google Patents

Maintenance structure of ink-jet print-head using ink supply valve Download PDF

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Publication number
KR20020049716A
KR20020049716A KR1020000078976A KR20000078976A KR20020049716A KR 20020049716 A KR20020049716 A KR 20020049716A KR 1020000078976 A KR1020000078976 A KR 1020000078976A KR 20000078976 A KR20000078976 A KR 20000078976A KR 20020049716 A KR20020049716 A KR 20020049716A
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South Korea
Prior art keywords
ink
chamber
print head
ink supply
nozzle
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KR1020000078976A
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Korean (ko)
Inventor
김일
Original Assignee
윤종용
삼성전자 주식회사
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Priority to KR1020000078976A priority Critical patent/KR20020049716A/en
Publication of KR20020049716A publication Critical patent/KR20020049716A/en

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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
    • B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/235—Print head assemblies
    • 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
    • B41J2/14032—Structure of the pressure chamber
    • B41J2/1404—Geometrical characteristics
    • 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
    • B41J2/14145—Structure of the manifold
    • 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
    • B41J2/17596—Ink pumps, ink valves
    • 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
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2002/16582—Maintenance means fixed on the print head or its carriage
    • 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
    • B41J2202/05—Heads having a valve

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  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Ink Jet (AREA)

Abstract

PURPOSE: An inkjet print head maintenance structure is provided to allow print head to smoothly perform its function by removing air bubble remaining in the chamber of print head and preventing clogging of nozzle. CONSTITUTION: In an inkjet print head where ink feeding is performed directly through an ink feed channel(110), from an ink cartridge(100) to a chamber(120) of the inkjet print head, an electrically controllable valve(111) is arranged at the ink feed channel, such that the leakage of ink remaining in the chamber is prevented by shutting off the valve during the use of suction device or maintenance work performed due to capping operation.

Description

잉크 공급 벨브를 이용한 잉크젯 프린트헤드의 메인 터넌스 구조{Maintenance structure of ink-jet print-head using ink supply valve}Maintenance structure of ink-jet print-head using ink supply valve}

본 발명은 잉크젯 프린트헤드에서 챔버내에 잔존하는 기포를 제거하고 노즐의 막힘 현상을 억제할 수 있으므로 인해 프린터 헤드가 원래의 기능을 원활하게 수행할 수 있도록 하기 위한 잉크 공급 벨브를 이용한 잉크젯 프린트헤드의 메인 터넌스 구조에 관한 것이다.The present invention can remove the air bubbles remaining in the chamber in the inkjet printhead and suppress the clogging of the nozzle, so that the main head of the inkjet printhead using the ink supply valve to allow the printhead to perform its original functions smoothly. It is about the maintenance structure.

일반적으로 잉크젯 프린터는 구동방식에 따라 크게 서몰·버블 젯방식(Thermal·bubble jet type)과 압전방식(Piezo transducer type)으로 구분된다. 서몰·버블 젯방식은 전기적으로 챔버를 가열하여 챔버내 잉크가 열팽창에 의해서 노즐을 통해 분사되도록 하는 것이며, 압전방식은 압전체의 변형에 의해서 진동판을 구동시켜 그 진동력으로 챔버내 잉크가 노즐을 통해 분사되도록 하는 것이다.In general, inkjet printers are largely classified into thermal / bubble jet type and piezoelectric type according to the driving method. The thermal and bubble jet method electrically heats the chamber so that ink in the chamber is injected through the nozzle by thermal expansion, and the piezoelectric method drives the diaphragm by deformation of the piezoelectric body, and the ink in the chamber is driven by the vibration force through the nozzle. To be injected.

이중 도 1은 압전방식을 이용한 프린트헤드의 일례를 도시한 일부 확대 단면도로서, 잉크의 유동 통로인 리스트릭터(1a)와 리저버(2a) 및 노즐(3a)을 갖는 리스트릭터판(1)과 리저버판(2)과 노즐판(3)으로 이루어지는 바디와 이러한 바디의 유동 통로를 통해 잉크를 유동시키면서 노즐(3a)을 통해 잉크가 토출되도록 구동력을 발생시키는 상부 전극(4)과 압전체(5)와 하부 전극(6), 그리고 진동판(7)과 챔버판(8)으로 이루어지는 구동수단인 압전 액츄에이터로서 크게 구분한다.1 is a partially enlarged cross-sectional view showing an example of a piezoelectric printhead, and includes a restrictor plate 1 and a reservoir having a restrictor 1a, a reservoir 2a, and a nozzle 3a, which are ink flow passages. A body consisting of a plate 2 and a nozzle plate 3 and an upper electrode 4 and a piezoelectric body 5 for generating a driving force so that ink is discharged through the nozzle 3a while flowing ink through the flow passage of the body; The lower electrode 6 and the piezoelectric actuator, which is a driving means composed of the diaphragm 7 and the chamber plate 8, are broadly classified.

이와 같은 구성에서 특히 노즐판(3)은 판면에 다수 형성된 노즐(3a)을 통해 잉크를 외부로 토출시키게 되는 부재로서, 노즐(3a)을 통한 잉크의 정확하고 안정된 토출을 위해 통상 일렉트로포밍(electroforming)에 의해 정밀 제작되도록 하고 있다.In such a configuration, in particular, the nozzle plate 3 is a member which discharges ink to the outside through the nozzle 3a formed on the plate surface, and is usually electroforming for accurate and stable discharge of ink through the nozzle 3a. To be manufactured precisely).

이때, 상술한 압전 구동 방식에 있어서 잉크는 그 점도가 비교적 높은 상태이므로 항상 외부와 연통되어 있는 노즐 부위에서는 잉크의 응고가 쉽게 이루어지면서 노즐이 자주 막히게 된다.At this time, since the ink has a relatively high viscosity in the above-described piezoelectric driving method, the nozzle is frequently clogged while the ink is easily solidified at the nozzle portion always in communication with the outside.

이를 해결하기 위하여 현재는 도 2에서 보는바와 같은 셕션장치 즉 헤드가 비구동시 헤드가 결합되어 있는 헤드 캐리지가 안착되도록 홀더(9)가 일측에 마련되고, 이 홀더(9)는 펌핑수단(10)과 연결되어 펌핑수단(10)에서의 강제 흡입에 의해서 홀더(9)에 밀착되는 헤드를 강제 흡입시켜 헤드를 정규적으로 또는 비정규적으로 클리닝하도록 하고 있다.To solve this problem, a holder 9 is provided on one side so that the head carriage to which the head is coupled when the head is not driven, as shown in FIG. 2, is provided, and the holder 9 has pumping means 10. Connected to the forcible suction force on the holder 9 by the forced suction in the pumping means 10 so as to clean the head regularly or irregularly.

따라서 이러한 석션장치를 위해서는 최소한 각 헤드의 노즐로부터 잉크를 흡입하는 펌핑수단(10)과 함께 이 펌핑수단(10)을 구동시키는 구동수단(11)이 반드시 필요로 되고, 특히 구동수단(11)과 펌핑수단(10)간에는 적절한 구동력 생성을 위한 변속구조가 필요로 되었다.Therefore, for such a suction device, at least a driving means 11 for driving the pumping means 10 together with a pumping means 10 for sucking ink from the nozzles of each head is necessary. Between the pumping means 10 has been required a shift structure for generating a suitable driving force.

하지만 상기와 같은 석션장치는 대단히 복잡한 구성으로 이루어지게 되므로 프린트를 제작하는데 소요되는 시간과 비용의 필요량이 많아지게 되고, 특히 프린터에 석션장치를 별도로 구비하기 위해서는 필요한 공간 확보가 반드시 이루어져야만 하는 어려움이 있다.However, such a suction device is made of a very complex configuration, so the time and cost required for manufacturing a print becomes large, and in particular, in order to have a separate suction device in the printer, it is difficult to secure necessary space. have.

또한 종전의 석션장치에서는 노즐로부터 잉크를 강제로 흡입하여 토출시키게 될 때 각 노즐에서의 응고정도가 약간씩 달라 응고력이 약하거나 토출부하가 적은 노즐에서는 원활하게 잉크가 토출되는데 반해 응고력이 강하거나 토출부하가 강력한 노즐에서는 잉크가 제대로 토출되지 않는 현상이 발생되면서 인쇄가 제대로 이루어지지 않게 되고, 특히 펌핑수단(10)에 의해 강제 흡입하는 과정에서 과다하게 잉크가 소모되는 비경제적인 문제가 있다.In addition, in the conventional suction device, when the ink is forcibly sucked and discharged from the nozzle, the degree of solidification at each nozzle is slightly different, so ink is discharged smoothly at a nozzle having a low coagulation force or a low discharge load. In addition, the ink may not be properly discharged from the nozzle having a strong discharge load, and thus printing may not be performed properly. In particular, there is an uneconomical problem in that the ink is excessively consumed during the forced suction by the pumping means 10.

상술한 석션 방식 이외에 전술한 압전 구동 방식의 프린터 헤드의 문제점을 해소하는 방식으로 캐핑(Capping) 방식과 공토출 방식이 존재한다. 캐핑방식은 잉크 노즐쪽의 잉크 건조를 억제하기 위해 외기와 차단하는 방식이며, 공토출 방식은 본사하지 않은 노즐에서 잉크의 점도 증가등의 변수를 없애고 초기화 하기 위해 인쇄중 또는 인쇄이전에 인쇄에 기여하지 않는 액적을 따로 토출하는 방식이다.In addition to the suction method described above, a capping method and an air discharging method exist as a method of solving the problems of the aforementioned print head of the piezoelectric driving method. The capping method is to block outside air to suppress the ink drying on the ink nozzle side, and the empty discharge method contributes to printing during or before printing to remove and initialize variables such as viscosity increase of ink at nozzles not headquartered. It is a method of discharging droplets which are not used separately.

상술한 석션 방식과 캐핑(Capping) 방식 및 공토출 방식등을 통칭하여 메인터넌스라고 칭하는데, 현재까지의 방식으로는 그 장단이 있어 최적의 메인터넌스를 이루지 못하는 문제점이 발생되었다.The above-mentioned suction method, capping method, and empty discharging method are collectively referred to as maintenance, but the present method has a short and long period of time, and thus a problem of failing to achieve optimal maintenance has occurred.

상술한 바와 같은 종래 기술의 문제점을 해소하기 위한 본 발명의 목적은 잉크젯 프린트헤드에서 챔버내에 잔존하는 기포를 제거하고 노즐의 막힘 현상을 억제할 수 있으므로 인해 프린터 헤드가 원래의 기능을 원활하게 수행할 수 있도록 하기 위한 잉크 공급 벨브를 이용한 잉크젯 프린트헤드의 메인 터넌스 구조를 제공하는 데 있다.An object of the present invention for solving the problems of the prior art as described above is to remove the air bubbles remaining in the chamber in the inkjet printhead and to suppress the clogging of the nozzle, so that the printhead can perform the original function smoothly. It is to provide a maintenance structure of an inkjet printhead using an ink supply valve to make it possible.

도 1은 일반적인 잉크젯 프린트헤드의 전체적인 구조를 도시한 측단면도.1 is a side cross-sectional view showing the overall structure of a typical inkjet printhead.

도 2는 종래 석션장치를 도시한 개략도.Figure 2 is a schematic diagram showing a conventional suction device.

도 3 내지 도 5는 본 발명에 따라 잉크 공급 벨브를 이용한 잉크젯 프린트헤드의 메인 터넌스 구조를 설명하기 위한 예시도.3 to 5 are exemplary views for explaining the maintenance structure of the inkjet printhead using the ink supply valve according to the present invention.

상기한 목적을 달성하기 위하여 본 발명의 특징은, 잉크 카트리지에서 프린터헤드를 구성하는 챔버측으로 잉크 공급 유로를 통해 직접적인 잉크의 공급을 수행하는 잉크젯 프린터에 있어서: 상기 잉크 공급 유로상에 전자적으로 개폐 제어 가능한 밸브를 구비시켜 석션장치의 사용 또는 공토출 또는 캡핑(Capping) 동작에 따른 메인터넌스 기능 수행시 상기 밸브를 폐쇄시켜 챔버내에 잔존하는 잉크의 불필요한 누수를 방지하는 데 있다.In order to achieve the above object, a feature of the present invention is an inkjet printer which performs a supply of ink directly through an ink supply flow path from an ink cartridge to a chamber side constituting a printhead: electronically opening and closing control on the ink supply flow path. In order to prevent unnecessary leakage of the ink remaining in the chamber by closing the valve when performing the maintenance function according to the use of the suction device or the empty discharge or capping (Capping) operation by providing a possible valve.

본 발명의 상술한 목적과 여러 가지 장점은 이 기술 분야에 숙련된 사람들에 의해 첨부된 도면을 참조하여 후술되는 발명의 바람직한 실시 예로부터 더욱 명확하게 될 것이다.The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

이하, 본 발명의 바람직한 실시 예를 첨부한 도면에 따라 상세히 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 3 내지 도 5는 본 발명에 따라 잉크 공급 벨브를 이용한 잉크젯 프린트헤드의 메인 터넌스 구조를 설명하기 위한 예시도로서, 도 3은 본 발명에 따라 잉크 공급 벨브를 이용한 잉크젯 프린트헤드의 정상상태이며, 도 4는 도 3에 도시되어 있는 구조에서 석션장치를 이용하는 상태의 예시도이고, 도 5는 석션장치를 이용하여 챔버내부에 잔존하는 공기를 제거한 상태의 예시도이다.3 to 5 are exemplary views for explaining the maintenance structure of the inkjet printhead using the ink supply valve according to the present invention, Figure 3 is a steady state of the inkjet printhead using the ink supply valve according to the present invention 4 is an exemplary view of a state using a suction device in the structure shown in Figure 3, Figure 5 is an illustration of a state that removes the air remaining in the chamber using the suction device.

일반적으로 종래에는 참조번호 100으로 도시되어 있는 잉크 카트리지에서 프린터헤드를 구성하는 챔버(120)측으로 잉크 공급 유로(110)를 통해 직접적인 잉크의 공급을 수행하게 된다.In general, the ink cartridge shown in the prior art 100 is directly supplied to the ink through the ink supply flow path 110 to the chamber 120 constituting the print head.

그러나, 이러한 구조는 상술한 종래 기술의 문제점을 유발하기 때문에, 본 발명에서는 잉크 공급 유로(110)상에 전자적으로 제어 가능한 밸브(111)를 구비시켜 구비되어 있는 벨브(111)의 개폐동작을 통해 챔버내의 잉크 잔량을 조절하게 된다.However, since such a structure causes the above-mentioned problems of the prior art, in the present invention, the opening and closing operation of the valve 111 provided with the electronically controllable valve 111 on the ink supply flow path 110 is provided. The remaining amount of ink in the chamber is adjusted.

이때, 메인 터넌스를 위해 석션장치를 이용하는 경우 첨부한 도 4에 도시되어 있는 바와 같이, 석션장치와 연결되어 있는 흡입관(130)이 프린터 헤드의 노즐(121)을 커버한 상태에서 벨브(111)를 오프시킨다.At this time, in the case of using the suction device for maintenance, as shown in the accompanying FIG. 4, the valve 111 in a state in which the suction pipe 130 connected to the suction device covers the nozzle 121 of the print head. Off.

이후, 상기 흡입관(130)이 연결되어 있는 석션장치를 구동시키면 챔버내에 잔존하는 공기를 흡입하게 된다. 석션장치의 흡입과정시 상기 벨브(111)가 오프상태이므로 챔버내에는 잔존하는 공기가 제거된 이후 진공상태가 됨에 따라 실질적인 잉크의 손실이 발생되지 않고, 이후 석션장치가 동작을 중지하고 흡입관(130)이 상기 프린터 헤드의 노즐(121)의 주변에서 철수하면 첨부한 도 5에 도시되어 있는 바와 같은 모습을 하게 된다.Thereafter, driving the suction device to which the suction pipe 130 is connected inhales the air remaining in the chamber. Since the valve 111 is turned off during the suction process of the suction device, since the air remaining in the chamber is removed after the vacuum is removed, substantial loss of ink does not occur. Then, the suction device stops the operation and the suction pipe 130 is removed. ) Withdraws from the periphery of the nozzle 121 of the print head, as shown in FIG. 5.

이후, 상기 벨브(111)를 개방하여 첨부한 도 3의 모습으로 환원되어 지는 것이다.After that, the valve 111 is reduced to the state of FIG.

이상의 설명에서 본 발명은 특정의 실시 예와 관련하여 도시 및 설명하였지만, 특허청구범위에 의해 나타난 발명의 사상 및 영역으로부터 벗어나지 않는 한도 내에서 다양한 개조 및 변화가 가능하다는 것을 당 업계에서 통상의 지식을 가진 자라면 누구나 쉽게 알 수 있을 것이다.While the invention has been shown and described in connection with specific embodiments thereof, it is well known in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who owns it can easily find out.

상술한 바와 같이 동작하는 본 발명에 따른 잉크 공급 벨브를 이용한 잉크젯 프린트헤드의 메인 터넌스 구조를 제공하면, 잉크젯 프린트헤드에서 챔버내에 잔존하는 기포를 제거하고 노즐의 막힘 현상을 억제할 수 있으므로 인해 프린터 헤드가 원래의 기능을 원활하게 수행할 수 있도록 한다.Providing the maintenance structure of the inkjet printhead using the ink supply valve according to the present invention operating as described above, the inkjet printhead can remove the air bubbles remaining in the chamber and suppress the clogging of the nozzle Allow the head to perform its original functions smoothly.

Claims (1)

잉크 카트리지에서 프린터헤드를 구성하는 챔버측으로 잉크 공급 유로를 통해 직접적인 잉크의 공급을 수행하는 잉크젯 프린터에 있어서:In an inkjet printer which directly supplies ink through an ink supply flow path from an ink cartridge to a chamber side constituting the print head: 상기 잉크 공급 유로상에 전자적으로 개폐 제어 가능한 밸브를 구비시켜 석션장치의 사용 또는 공토출 또는 캡핑(Capping) 동작에 따른 메인터넌스 기능 수행시 상기 밸브를 폐쇄시켜 챔버내에 잔존하는 잉크의 불필요한 누수를 방지하는 것을 특징으로 하는 잉크 공급 벨브를 이용한 잉크젯 프린트헤드의 메인 터넌스 구조.By providing a valve that can be opened and closed electronically on the ink supply flow path to close the valve when using the suction device or performing the maintenance function according to the empty discharge or capping (capping) operation to prevent unnecessary leakage of ink remaining in the chamber The maintenance structure of the inkjet printhead using the ink supply valve characterized by the above-mentioned.
KR1020000078976A 2000-12-20 2000-12-20 Maintenance structure of ink-jet print-head using ink supply valve KR20020049716A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9321275B2 (en) 2011-03-04 2016-04-26 Hewlett-Packard Development Company, L.P. Valve systems for managing air in a fluid ejection system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9321275B2 (en) 2011-03-04 2016-04-26 Hewlett-Packard Development Company, L.P. Valve systems for managing air in a fluid ejection system
US9597887B2 (en) 2011-03-04 2017-03-21 Hewlett-Packard Development Company, L.P. Pen housings

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