EP0326568A1 - Tete d'ecriture a l'encre a couches multiples. - Google Patents

Tete d'ecriture a l'encre a couches multiples.

Info

Publication number
EP0326568A1
EP0326568A1 EP87906568A EP87906568A EP0326568A1 EP 0326568 A1 EP0326568 A1 EP 0326568A1 EP 87906568 A EP87906568 A EP 87906568A EP 87906568 A EP87906568 A EP 87906568A EP 0326568 A1 EP0326568 A1 EP 0326568A1
Authority
EP
European Patent Office
Prior art keywords
ink
head
plate
sandwich
nozzle
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.)
Granted
Application number
EP87906568A
Other languages
German (de)
English (en)
Other versions
EP0326568B1 (fr
Inventor
Peter Kulzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19873710654 external-priority patent/DE3710654A1/de
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0326568A1 publication Critical patent/EP0326568A1/fr
Application granted granted Critical
Publication of EP0326568B1 publication Critical patent/EP0326568B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B41J2/145—Arrangement thereof
    • B41J2/155—Arrangement thereof for line printing
    • 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
    • B41J2002/14459—Matrix arrangement of the pressure chambers

Definitions

  • the invention relates to a multi-layered ink writing head and a method for its production according to the preambles of claims 1 and 7 respectively.
  • Ink printing devices with piezoelectrically driven drive elements are generally known and have been used successfully.
  • DE-OS 32 42 283 for example, a multi-layer ink jet print head is described which essentially has a chamber strip in which a feed channel for the ink is incorporated. A connection piece is assigned to this feed channel, via which the ink head is supplied with ink.
  • Feed lines open into the feed channel and are connected on the surface of the chamber strip to throttle channels going out laterally. This. Throttle channels open laterally into conical pressure chambers. The nozzle channel is arranged in the center of these pressure chambers.
  • the nozzle channels themselves are guided through their own base body of the ink jet print head and open at the lower end of the base body into nozzles of a nozzle plate arranged closely next to one another.
  • the nozzle plate itself is pressed against the base body by a tension spring.
  • the side of the chamber strip into which the pressure chambers and the nozzle chambers are stamped is covered by a metal membrane that extends across the entire width of the chamber strip. On this Me allmembra ⁇ the drive elements are arranged, preferably glued.
  • the chamber strip and the connection to the metal membrane are produced in such a way that the conical chambers and the throttle ducts are first embossed in the chamber strip and then the nozzle ducts are drilled.
  • the metal membrane and the chamber strip are then atomically connected to one another by diffusion welding.
  • Pressure chambers with a centrally arranged nozzle channel and lateral ink inlet also have the disadvantage that air bubbles caused by outgassing of the ink, for example, are difficult to remove from these pressure chambers.
  • One way of removing these gas bubbles is to exert pressure on the supply side on the ink and thus flush the pressure chambers. However, this only removes the gas bubbles located in the center of the pressure chambers. The gas bubbles settling on the edge are not reached by the flow in the pressure chamber or are controlled by the flow in such a way that they remain in the pressure chamber and thus considerably disrupt the control behavior of the entire print head.
  • E-PS-81-00 37 624 it is known from E-PS-81-00 37 624 to arrange islands at the inlet area and at the outlet area of the pressure chambers which divide the ink flow and ensure that the ink runs along the wall areas through the pressure chamber flows.
  • the object of the invention is to design a multi-layer ink writing head of the type mentioned at the outset in such a way that it can be produced in a simple manner and in a large number of operations and which has a favorable flow pattern of the ink, so that any gas bubbles which may have penetrated easily can be removed.
  • the ink writing head consists of a separately producible sandwich ink head and a receiving part which receives the sandwich ink head with integrated ink supply means that the entire ink writing head can be manufactured very easily and simply.
  • the sandwich ink head consists of several plates arranged one above the other, structured according to the corresponding ink channels, which are firmly connected to one another by diffusion welding, one side of the sandwich ink head through the membrane plate and the other side of the sandwich ink head through Nozzle plate is formed.
  • the ink head can advantageously be composed of molded parts which are easy to produce, in particular by punching, and can be produced in one working
  • the ink writing head Due to the construction of the ink writing head according to the invention it is; the connection of metal for the individual plates 0 is possible and thus the application and creation of very fine contours.
  • the sandwich ink head can be produced in automated processes in the clean room.
  • the piezo disks designed as drive elements can be easily connected to the metal membrane 5 by gluing or soldering.
  • throttle channels ensured as channels, slit 25 with sodium cross-section, on the one hand, the inks of the write frequency flow in correspondingly quickly ovin ⁇ NEN, on the other hand, pressure waves can not pass.
  • Show it 1 shows a schematic exploded view of the multilayered ink writing head
  • FIG. 3 shows a schematic representation of the area of the pressure chambers of the sandwich ink head
  • FIG. 4 shows a schematic sectional illustration along the section lines of FIG. 3,
  • FIG. 5 shows a schematic representation of a pressure chamber with associated throttle section
  • FIG. 6 shows a schematic illustration of the nozzle arrangement in the case of a sandwich ink head designed as a 24 nozzle head.
  • An ink printhead is arranged in a Ti- ⁇ ten printing device (not shown in detail here), which is written line by line along a J recording medium.
  • the layered ink writing head consists of a receiving body 10 with an ink supply line 11 arranged therein and a connecting piece 12 for connection to an ink bottle, not shown here.
  • the receiving body 10 can be made of thermoplastic material and is screwed onto a printing carriage (not shown here) of the ink printing device via a fastening piece 13.
  • the receiving body 10 serves to receive a separately manufactured sandwich ink head of a so-called planetary ink head.
  • this sandwich ink head is composed of five metal plates, which are described in detail below.
  • One side of the sand important ink head forms a Me bra ⁇ platte 14 made of nickel with a plate thickness of 0.03 mm on which according to the number of nozzles (in this case 24) piezo plates with a diameter of about 1 mm are arranged as drive elements for the pressure chambers.
  • a pressure chamber plate 16 adjoins the membrane plate and is likewise made of nickel and has a thickness of 0.2 mm corresponding to the desired height of the pressure chambers. All pressure chambers 17 of the sandwich head and supply structures 18 for the ink supply are located in the pressure chamber plate 16. To the pressure chamber plate 16, in turn, a waste includes top plate 19 of a thickness of about 0.1 mm at which the mouth portions of the nozzle channel 20 and the Tintenzu réelle- channel 21 j 'Eder pressure chamber 17 contain further Aus ⁇ recesses 22, the components the ink supply.
  • throttling sections 24 with a columnar cross-section are arranged in the form of slits and recesses 25 as components of the ink supply.
  • the sandwich ink head is completed by a.
  • Nozzle plate 26 (thickness 0.1 mm), which is also made of nickel and on which the nozzle openings 27 are arranged in a configuration corresponding to the desired resolution.
  • the metal plates After the individual metal plates have been produced by etching, stamping or galvanoplastic, the metal plates are layered one above the other and connected to one another by diffusion welding. For this purpose, the plates are pressed together and exposed to an elevated temperature under protective gas or vacuum. The temperature and holding time depend on the respective material of the nozzle plates. Diffusion welding is advantageous in the production of inkjet printheads because a flat metallic connection is produced and no changes in the channel structure due to excess solder or adhesive occur. In addition, this results in a heat-resistant structure and uniform metal can be used for the head.
  • the plates In order to make the structures easy to manufacture, it is advantageous to produce the plates from readily etchable material, such as nickel silver, but to silver them to achieve a good welded connection and to weld these silver-plated parts together with nickel parts. Diffusion welding is possible at temperatures between 40 and 90% of the absolute melting temperature of the part material. In order to achieve a material pairing with silver which is favorable for diffusion welding, it is sufficient for the layer structure to silver-plate at least every second plate.
  • the piezoplates 15 are glued onto the membrane plate 14, if not already done beforehand.
  • the sandwich ink head thus produced can now be mounted on the receiving body 10 via a connector 28.
  • FIGS. 2 to 5 have proven to be advantageous. This results in a straight-line course of the nozzle channel 20 from the individual pressure chambers 17 to the nozzle plate 26. Both the nozzle channel 20 and the ink supply channel 21 open parallel to one another in the cylinder-shaped pressure chambers here, based on the diameter of the pressure chambers on the edges. Through this streamlined The structure entrains the air flowing through the pressure chamber and any air bubbles located at the edge of the pressure chambers 17, so that air bubbles cannot become lodged within the pressure chamber.
  • the throttle section In the direction of movement of the ink in front of the pressure chambers, the throttle section is in the form of a throttle channel with a columnar cross section.
  • the columnar cross-section of the throttle section ensures that, on the one hand, the ink can flow in according to the writing frequency, on the other hand, pressure waves cannot pass through. All throttle sections 24 are supplied with ink via a common ink feed 29.
  • the natural frequency of the overall system is very high and the settling time for the ink in the printing area is very low, which results in a high spray frequency.
  • the (arrow) flow pattern of the ink shown in FIG. 1 results.
  • the ink is conducted via the receiving body 10 and the connecting piece 28 to the throttle sections 24 of the pressure chambers 17.
  • the ink reaches the nozzle openings 27 from the pressure chambers 17 via branch channels (nozzle channels 20).
  • nozzles are arranged, and accordingly 6 in eight rows of three nozzles each. Depending on the slope of the individual rows of nozzles, there is a different vertical distance 31 from nozzle to nozzle, and thus a change in the font quality (resolution).
  • the nozzles can be arranged on the sandwich ink head, or it is possible to achieve this configuration by mounting the sandwich ink head at an angle to the writing direction.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

Une tête d'écriture à l'encre à couches multiples, dans laquelle chaque buse d'écriture (27) est reliée par un canal (20) à une chambre de pression (17), comprend une tête encreuse en sandwich fabriquée séparement et composée d'une pluralité de plaques superposées, structurées de façon à correspondre aux canaux d'encre et fixées les unes aux autres par un procédé de soudure par diffusion. Un côté de la tête encreuse en sandwich est formé d'une plaque à membrane (14) et l'autre côté par la plaque portant les buses (26). Une partie de réception ayant une alimentation en encre incorporée sert d'élément de montage pour la tête encreuse en sandwich. Tous les évidements recevant l'encre de la tête en sandwich sont formés par des ouvertures des plaques individuelles.
EP87906568A 1986-10-16 1987-10-13 Tete d'ecriture a l'encre a couches multiples Expired - Lifetime EP0326568B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3635292 1986-10-16
DE3635292 1986-10-16
DE19873710654 DE3710654A1 (de) 1987-03-31 1987-03-31 Mehrschichtig aufgebauter tintenschreibkopf
DE3710654 1987-03-31

Publications (2)

Publication Number Publication Date
EP0326568A1 true EP0326568A1 (fr) 1989-08-09
EP0326568B1 EP0326568B1 (fr) 1990-08-22

Family

ID=25848517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87906568A Expired - Lifetime EP0326568B1 (fr) 1986-10-16 1987-10-13 Tete d'ecriture a l'encre a couches multiples

Country Status (5)

Country Link
EP (1) EP0326568B1 (fr)
JP (1) JPH02500732A (fr)
AU (1) AU8072687A (fr)
DE (1) DE3764474D1 (fr)
WO (1) WO1988002698A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5592203A (en) * 1992-07-31 1997-01-07 Francotyp-Postalia Gmbh Ink jet print head
US5714078A (en) * 1992-07-31 1998-02-03 Francotyp Postalia Gmbh Edge-shooter ink jet print head and method for its manufacture
US5752303A (en) * 1993-10-19 1998-05-19 Francotyp-Postalia Ag & Co. Method for manufacturing a face shooter ink jet printing head

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5087930A (en) * 1989-11-01 1992-02-11 Tektronix, Inc. Drop-on-demand ink jet print head
US5757400A (en) * 1996-02-01 1998-05-26 Spectra, Inc. High resolution matrix ink jet arrangement
US8376525B2 (en) 2006-09-08 2013-02-19 Canon Kabushiki Kaisha Liquid discharge head and method of manufacturing the same
US20100133325A1 (en) * 2008-12-01 2010-06-03 Xerox Corporation Unified metal alloying in a diffusion furnace
US7980447B2 (en) 2008-12-12 2011-07-19 Xerox Corporation Jet stack brazing in a diffusion furnace
JP2021088083A (ja) 2019-12-03 2021-06-10 セイコーエプソン株式会社 液体噴射ヘッドおよび液体噴射システム
JP7505179B2 (ja) * 2019-12-03 2024-06-25 セイコーエプソン株式会社 液体噴射ヘッドおよび液体噴射システム

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3714928A (en) * 1970-11-17 1973-02-06 Mead Corp Multiple jet channel
US4418356A (en) * 1981-09-23 1983-11-29 Ncr Corporation Ink jet print head
US4611219A (en) * 1981-12-29 1986-09-09 Canon Kabushiki Kaisha Liquid-jetting head
US4680595A (en) * 1985-11-06 1987-07-14 Pitney Bowes Inc. Impulse ink jet print head and method of making same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8802698A1 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5592203A (en) * 1992-07-31 1997-01-07 Francotyp-Postalia Gmbh Ink jet print head
US5714078A (en) * 1992-07-31 1998-02-03 Francotyp Postalia Gmbh Edge-shooter ink jet print head and method for its manufacture
US5802687A (en) * 1992-07-31 1998-09-08 Francotyp-Postalia Ag & Co. Method of manufacturing an ink jet print head
US5825382A (en) * 1992-07-31 1998-10-20 Francotyp-Postalia Ag & Co. Edge-shooter ink jet print head and method for its manufacture
US5752303A (en) * 1993-10-19 1998-05-19 Francotyp-Postalia Ag & Co. Method for manufacturing a face shooter ink jet printing head
US5845380A (en) * 1993-10-19 1998-12-08 Francotyp-Postalia Ag & Co. Method for manufacturing a module for shorter ink jet printing head with parallel processing of modules
US6070972A (en) * 1993-10-19 2000-06-06 Francotyp-Postalia Ag & Co. Face shooter ink jet printing head

Also Published As

Publication number Publication date
WO1988002698A1 (fr) 1988-04-21
EP0326568B1 (fr) 1990-08-22
AU8072687A (en) 1988-05-06
JPH02500732A (ja) 1990-03-15
DE3764474D1 (de) 1990-09-27

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