JP2007230119A - Method for manufacturing ink-jet printer head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve miniaturization of an ink-jet printer head by devising and manufacturing a reinforcing frame. <P>SOLUTION: A metal pipe 49 which is a hollow shape and extends longitudinally, has its vertical cross-sectional outer shape with an approximately rectangle. A hollow part 48 with an approximately round shape in a plane view which can be an ink passage 41 of the reinforcing frame 40, and a hollow part 47 with a rectangular shape in a plane view which can be an opening part 40a, are formed and they are respectively continuously extended in the direction of the central axial line C of the metal pipe. The metal pipe 49 is cut out by a thickness t and an angle θ of inclination to the central axial line C and is processed to manufacture the reinforcing frame 40. As the ink passage 41 of the reinforcing frame 40 is connected so as to face obliquely outward to an ink feeding opening 17, the position of the ink feeding opening 17 is provided at a position more inside in the longitudinal direction (direction X) of the reinforcing frame 40 than a position of an ink outlet 5a of an ink storing room 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an ink jet printer head manufacturing method.

  An ink jet printer head, for example, as disclosed in Patent Document 1, includes a cavity unit having a nozzle for ejecting ink, a pressure chamber communicating with the nozzle, and an ink supply port for supplying ink. A front head unit is formed by unitizing an actuator that selectively applies pressure and a flexible wiring material that applies voltage to the actuator, and a reinforcing frame is bonded to the back surface thereof. The actuator has an energy generator corresponding to the pressure chamber. Then, an ink jet printer head is mounted on the head holder, an ink flow path forming member (ink storage chamber) for supplying ink to the ink supply port is connected, and the energy generating part of the actuator is selectively driven. Ink is ejected from the nozzles for printing.

  The reinforcement frame is a frame shape with a metal opening, and the actuator and flexible wiring material are exposed to the opening and bonded to the cavity unit, increasing the rigidity of the front head unit and discharging ink. Sometimes it is prevented from being deformed by the force applied to the front head unit. The reinforcing frame has an ink passage formed at a position corresponding to the ink supply port of the front head unit and the ink outlet of the ink passage forming member (ink storage chamber). An elastic seal member for preventing ink leakage is interposed between the ink outlet of the (ink storage chamber) and the ink passage. The ink passage of the reinforcing frame is formed adjacent to the above-described opening, and the reinforcing frame receives a pressure accompanying compression of the elastic seal member on a flat surface around the ink passage.

JP-A-2005-161762

  In recent years, ink-jet printer heads have been required to have multiple nozzles, high density, and downsizing as the size of the ink-jet printers has been increased while the resolution is high. Therefore, each part of the front head unit is shortened in its entire outer shape. Especially in the cavity unit, the overall position of the outer shape is shortened, and the installation position of the ink supply port is arranged on the inner side (pressure chamber side). By doing so, it can be shortened.

  By the way, with the downsizing of the front head unit, it is necessary to reduce the size of the reinforcing frame fixed to the back surface of the unit. However, there is a problem in manufacturing the reinforcing frame. The reinforcing frame needs to shorten the entire outer shape corresponding to the front head unit, and to arrange the ink passage corresponding to the ink supply port on the inner side. That is, the width of the flat surface between the opening and the ink passage is shortened. However, in manufacturing, it is difficult to process the width of the flat surface smaller than the thickness of the reinforcing frame. The width must be greater than or equal to a predetermined value. It has been difficult to reduce the size of the reinforcing frame by reducing the width of the flat surface between the opening and the ink passage described above due to the plate thickness necessary for rigidity as the reinforcing frame.

  Further, since the elastic seal member is compressed as described above, the flat surface around the ink passage of the reinforcing frame must hold a plane (width) necessary for the crushing allowance. Therefore, even if the front head unit can be shortened, the width of the flat surface around the ink passage including the space between the ink passage and the opening of the reinforcing frame cannot be shortened, making it difficult to reduce the size of the ink jet printer head. There was a problem. Furthermore, as the number of nozzles is increased, it becomes necessary to supply a large amount of ink from the ink flow path forming member (ink storage chamber), while ensuring the size of the ink flow path forming member. In order to efficiently perform operations such as discharging ink from the head unit by suction or the like, or wiping with a wiper, there has been a demand for downsizing the inkjet printer head.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to reduce the size of an inkjet printer head by devising a reinforcing frame in the inkjet printer head manufacturing method. It is what.

  In order to achieve this object, according to the first aspect of the present invention, a cavity unit comprising a plurality of nozzles arranged in a row for discharging ink, an ink supply port for supplying ink to the nozzle, and the ink In a method of manufacturing an ink jet printer head comprising a connecting pipe having an ink passage connected to a supply port, the connecting pipe is made of a material having a cavity longer than the ink passage with respect to the central axis direction of the cavity. The cavity unit is formed by cutting in an inclined direction, and is joined to the cavity unit so that the center axis of the ink passage of the cut connection pipe is directed outwardly from the ink supply port. .

  According to a second aspect of the present invention, the cavity unit has a flat plate shape in the row direction of the nozzles, and is provided with an actuator for applying pressure for ejecting ink from the nozzles on the back surface, and the ink supply port is The cut connection pipe is formed as a part of a flat reinforcing frame along the back surface of the cavity unit, and the reinforcing frame is adjacent to the ink passage. 2. The method of manufacturing an ink jet printer head according to claim 1, wherein the material is formed of two adjacent cavities serving as ink passages in the opening and the connecting pipe. It is formed longer than the opening and ink passage, and the material is cut in a direction inclined with respect to the central axis direction of each cavity. The reinforcing frame is formed, and the cut reinforcing frame is joined to the cavity unit so that the ink passage is connected to the ink supply port and the actuator is exposed from the opening. It is characterized by.

  According to a third aspect of the present invention, in the ink jet printer head manufacturing method according to the second aspect, the material is made of metal.

  According to a fourth aspect of the present invention, in the method of manufacturing an ink jet printer head according to any one of the first to third aspects, the material is formed by extrusion molding or pultrusion molding.

  According to a fifth aspect of the present invention, in the ink jet printer head manufacturing method according to any one of the first to fourth aspects, a flat surface is formed around the ink passage to cut the material, and the ink supply port An ink storage chamber for supplying ink to the cavity unit via the ink passage is brought into contact with a flat surface opposite to the ink supply port of the ink passage connected to the ink passage.

  As is apparent from the above description, according to the first aspect, a cavity unit including nozzles arranged in a row and an ink supply port for supplying ink to the nozzles is connected to the ink supply port. In a method of manufacturing an ink jet printer head comprising a connecting tube having an ink passage, a material having a cavity longer than the ink passage is cut in a direction inclined with respect to the central axis direction of the cavity to form a connecting tube. Since the connecting pipe is joined to the cavity unit so that the center axis of the ink passage is directed outwardly from the ink supply port, the opening end position of the ink passage on the side of the connecting pipe connected to the cavity unit Is connected to the inner side of the opening end position of the ink passage formed on the other surface. It can be provided at a position near the ink supply port to the nozzle. Therefore, the length of the cavity unit in the direction connecting the ink supply port and the nozzle can be shortened, and the ink jet printer head can be reduced in size, and the cost of other components can be reduced. Further, the apparatus for the recovery operation can be downsized and the operation can be performed efficiently.

  If this manufacturing method is used, it can be manufactured by a simple method regardless of the plate thickness and width of the connecting pipe, and it can be shortened corresponding to the cavity unit while maintaining the rigidity as the connecting pipe. In addition, by changing the angle of inclination for cutting or cutting out to the desired plate thickness, the outer shape of the connecting pipe and the dimensions of the ink passage can be freely designed, so it can be matched to the specifications of the cavity unit and inkjet printer head. This increases the degree of freedom in design. Furthermore, it can be formed in large quantities, and the productivity is good.

  According to a second aspect of the present invention, the cavity unit has a flat plate shape in the row direction of the nozzles and includes an actuator on the back surface thereof, and the ink supply port is provided on one end side of the back surface of the cavity unit and cut. The connecting pipe is formed as a part of a flat reinforcing frame along the back surface of the cavity unit, and the reinforcing frame has a plate shape and a frame shape in which an opening is formed adjacent to the ink passage. The reinforcing frame retains the rigidity of the cavity unit, and can suppress deformation during driving of the inkjet printer head and force applied to the cavity unit during assembly to prevent deformation. Further, the material is formed by forming two adjacent cavities serving as the opening and the ink passage longer than the opening and the ink passage, and the material is inclined with respect to the central axis direction of each cavity. Since the reinforcing frame is cut in the direction and the cut reinforcing frame is bonded to the cavity unit so that the ink passage is connected to the ink supply port and the actuator is exposed from the opening, the conventional plate material As compared with the case where the reinforcing frame is formed by pressing or the like, the opening and the ink passage can be made closer to each other. For this reason, the ink jet printer head can be reduced in size by bringing the ink supply port of the cavity unit close to the actuator.

  According to the third aspect, since the material is made of metal, the rigidity of the reinforcing frame itself is high, and the rigidity of the ink jet printer head can be maintained. Even if the distance between the ink passage and the opening is reduced, the reinforcing frame can be provided with sufficient rigidity by cutting a long material with an arbitrary thickness.

  According to the fourth aspect of the present invention, since the material is extruded or pultruded, the connecting pipe or the reinforcing frame can be easily manufactured by cutting the material in an inclined direction, and the productivity is also good.

  According to the fifth aspect, the material is cut so as to form a flat surface around the ink passage, and the cavity unit is connected to the flat surface opposite to the ink supply port of the ink passage connected to the ink supply port. An ink storage chamber for supplying ink is contacted via the ink passage. That is, it is possible to form an ink flow path that guides ink from the ink storage chamber to the ink supply port of the cavity unit through the ink passage of the connecting pipe. In addition, as in Patent Document 1, even when the elastic seal member is sandwiched between the ink storage chamber and the ink passage port, a flat surface serving as a crushing margin to be pressed and compressed can be secured, thereby preventing ink leakage. be able to.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the side from which ink is ejected is the lower surface and the downward direction, and the opposite side is the upper surface and the upward direction.

  In the ink jet printer, a head unit 2 is provided on a guide shaft (not shown) so as to be movable along a recording sheet. The head unit 2 accommodates an ink jet printer head 1 that discharges ink from nozzles and inks of various colors, for example, black B, cyan C, magenta M, and yellow Y, in a substantially box-shaped head holder 20 that functions as a carriage. The ink storage chamber 5 and a circuit board 50 connected to an external power source (not shown) are mounted on the tower. Then, while the head unit 2 is reciprocally scanned along the recording paper in the width direction (Y direction in FIG. 1), the actuator 8 of the inkjet head 1 is driven, and ink is ejected from the nozzles to perform printing. The

  The ink jet printer head 1 includes a front head unit 100 and a reinforcing frame 40 fixed to the back surface thereof. The front head unit 100 is similar to the known one described in Japanese Patent Application Laid-Open No. 2003-80709. As shown in FIG. 1, the front head unit 100 is an upper surface of a cavity unit 7 having a nozzle surface on the lower surface of which a plurality of nozzles are arranged in the X direction. Further, a plate-type actuator 8 that selectively applies discharge pressure to the ink in the cavity unit 7 is joined via an adhesive sheet, and a flexible flexible wiring member 60 is electrically connected to the actuator 8 on the upper surface thereof. It is connected and pulled out in the Y direction, and a drive circuit 61 (described later) is mounted on the flexible wiring member 60.

  The ink jet printer head 1 is fixed to the lower surface of the bottom wall 20c of the head holder 20 with an adhesive, and the flexible wiring member 60 connected to the actuator 8 extends from the lower surface of the slit 20c1 penetrating the bottom wall 20c of the head holder 20. It is pulled out through. Further, a heat radiating plate 30 that contacts the drive circuit 61 and dissipates heat from the drive circuit 61 and the ink storage chamber 5 are fixed to the head holder 20, and a circuit board 50 is installed above the heat radiating plate 30. The The tip of the flexible wiring member 60 passed through the slit 20c1 is connected to the circuit board 50.

  The cavity unit 7 is formed by laminating a plurality of thin plates as shown in FIG. 1 and joining them with an adhesive. As is well known, a plurality of nozzles (not shown) are provided on the lowermost plate of the cavity unit 7. A plurality of rows are provided for each ink color at appropriate intervals in the longitudinal direction (X direction) and in a direction perpendicular to the longitudinal direction (Y direction). The uppermost plate has a plurality of pressure chambers 16 that are elongated in plan view, one end of which communicates with a plurality of nozzles, and the other end of which is a manifold channel (not shown) in the cavity unit 7. It is formed in communication with. The plurality of pressure chambers 16 are formed in a row in the X direction corresponding to the nozzle row, and are formed in a plurality of rows in the Y direction.

  Further, ink supply ports 17 are opened on the upper surface of the cavity unit 7 and arranged in four rows in the X direction for each ink color. Each ink is supplied from the ink outlet 5a provided for each ink color in the ink storage chamber 5 through the ink passage 41 of the reinforcing frame 40 described later to the ink supply port 17 for each ink color, and extends from each of them. It flows into a manifold channel (not shown) in the cavity unit 7. The ink is distributed to the plurality of pressure chambers 16 through the communication holes in the cavity unit 7 according to the ink color, and extends from each pressure chamber 16 to the corresponding nozzle. In the embodiment, the thin plate of the cavity unit 7 has a thickness of about 50 to 150 μm, the plate having a plurality of nozzles is made of synthetic resin such as polyimide, and the other plates are made of 42% nickel alloy steel plate. . The nozzle has a minute diameter of about 20 μm. In the drawing, the pressure chambers 16 are arranged in five rows in the X direction, whereas the four ink supply ports 17 are arranged in parallel in the X direction. The black ink is supplied from the black ink supply port 17 to the two pressure ink chambers 16 for black ink.

  On the other hand, the actuator 8 is formed by laminating and firing a plurality of ceramic layers (not shown), and the lowermost ceramic layer covers the plurality of pressure chambers 16 of the cavity unit 7. The thickness of one ceramic layer is about 30 μm and is a piezoelectric ceramic such as PZT. As is well known in Patent Document 1, the actuator 8 is formed with individual electrodes and a common electrode, and is arranged alternately with at least one ceramic layer sandwiched except for the lowermost ceramic layer, and is opposed to each other. Yes. The uppermost ceramic layer of the actuator 8 is provided with surface electrodes 26 and 27 that are electrically connected to the individual electrodes and the common electrode. Each of the surface electrodes 26 and 27 is made of a conductive material filled in a through hole (not shown) penetrating in the stacking direction of the stacked ceramic layers in the same manner as the known configuration described in Japanese Patent Laid-Open No. 2003-80709. It is electrically connected to each electrode via. Then, the cavity unit 7 and the actuator 8 are bonded and fixed so that each individual electrode and each pressure chamber 16 face each other. Further, a flexible wiring material 60 on which the drive circuit 61 is mounted is superimposed on the upper side of the actuator 8, whereby various wiring patterns (not shown) provided on the lower surface of the flexible wiring material 60 and the surface electrodes 27 and 28. Are electrically connected. In plan view, the outer shape of the actuator 8 is formed to be smaller than the outer shape of the cavity unit 7, and in order to fix a reinforcing frame 40 to be described later on the upper surface of the cavity unit 7 around the actuator 8. The flat surface is formed.

  A portion of the ceramic layer between the opposing electrodes in the actuator 8 is used as an energy generation unit, and the drive circuit 61 selectively applies a voltage between the individual electrode and the common electrode based on the print data. The energy generating unit corresponding to the applied individual electrode is distorted in the stacking direction to change the volume of the pressure chamber 16, and the ink is ejected from the nozzle.

  As shown in FIGS. 2 to 4, the reinforcing frame 40 is rectangular in plan view, and is formed in a plate shape that is inclined in the thickness direction with the upper and lower surfaces in the plan view being flat wide surfaces. At one end (one end in the X direction) of the reinforcing frame 40, an ink passage 41 is formed for each ink color at a position corresponding to the ink outlet 5a of the ink storage chamber 5 and the ink supply port 17 of the cavity unit 7. Yes. The ink passage 41 is slanted outward (right side in FIG. 4) from the end on the ink supply port 17 side toward the end on the ink outlet 5a side. In this embodiment, four ink passages 41 are arranged in parallel so as to correspond to the four ink supply holes 5a. One end portion of the reinforcing frame 40 having the ink passage 41 constitutes a “connection pipe” in the claims, and guides the ink supplied from the ink outlet 5 a to the ink supply port 17 of the cavity unit 7.

  The reinforcing frame 40 has a frame shape in which an opening 40a having a rectangular shape in plan view adjacent to the ink passage port 41 in the X direction is formed. 2 and 3 in the right direction) and inclined at the same angle. The opening 40a is slightly larger than the outer shape of the actuator 8 as shown in FIGS. 3 and 4, and smaller than the outer shape of the cavity unit 7, and the reinforcing frame 40 is connected to the actuator from the opening 40a. 8 and the flexible wiring member 60 are exposed, and are bonded and fixed to the upper surface of the cavity unit 7. The reinforcing frame 40 is made of metal (for example, SUS430), is thicker than the cavity unit 7, and has a large rigidity.

  The reinforcing frame 40 bonded to the front head unit 100 is bonded and fixed to the bottom wall 20 c of the head holder 20, and the ink passage 41 faces the open portion 20 d formed through the bottom wall of the head holder 20. It is located and is in the state of being exposed upward. Therefore, when the ink storage chamber 5 is mounted in the head holder 20, the ink outlet 5a and the ink passage port 41 are brought into contact with each other. An elastic member 6 is sandwiched between the ink passage 41 and the ink outlet 5 a so as to surround the ink passage port 41. The elastic member 6 is pressed against the flat portion 40 c around the ink passage 41 of the reinforcing frame 40. The elastic member 6 is made of a rubber-like elastic body, and four through holes 6a corresponding to the ink outlet 5a and the ink passage 41 (and the ink ink supply port 17 of the cavity unit 7) are formed in a line. That is, as shown in FIG. 4, the ink from the ink storage chamber 5 is supplied to the ink supply port 17 through the ink outlet 5 a, the through hole 6 a, and the ink passage port 41. The ink storage chamber 5 is attached to the reinforcement frame 6 by inserting the attachment screws 5b into the attachment holes 5c on both sides of the four ink outlets 5a and screwing them into the screw holes 40b on both sides of the ink passage 41 of the reinforcement frame 6. It is fixed against. Accordingly, the elastic member 6 is compressed and is brought into close contact with the flat portion 40c around the ink passage 41, so that the connection between the ink passage 41 and the ink outlet 5a can be sealed. In the embodiment, the elastic member 6 is used. However, when the elastic member 6 is not used, the ink storage chamber 5 comes into contact with the flat portion 40c around the ink passage 41, so that the ink flows out of the ink outlet 5a, The ink can be supplied to the cavity unit 7 through the ink passage 41 and the ink supply port 17.

  The ink passage 41 of the reinforcing frame 40 of the embodiment is bored with substantially the same diameter at the central axis B1 of the ink outlet 5a and the central axis B2 inclined with respect to the central axis of the ink supply port 17, and the ink supply port 17 The ink passage 41 is connected to the ink outlet 5a so as to face the outward side (right side in FIGS. 3 and 4). If the opening end on the ink storage chamber 5 side of the ink passage 41 is 41a and the opening end on the cavity unit 7 side is 41b, the opening end 41b is positioned on the inner side (left side in FIG. 4) by the dimension A than the opening end 41a. The Since the ink outlet 5a and the opening end 41a are positioned correspondingly and the opening end 41b and the ink supply port 17 are positioned correspondingly, the ink supply port 17 is located inside the ink outlet 5a by a dimension A (see FIG. 4 on the left side). That is, compared with the reinforcing frame 40 ′ (indicated by a broken line in FIG. 4) in which the ink passage port 41 is not formed obliquely, the ink passage 41 ′ has the same center in the ink outlet 5a and the ink supply port 17 ′. Since the ink supply ports 17 are formed on the axis B1 with substantially the same diameter, the ink supply port 17 is installed on the inner side by the dimension A than the ink supply port 17 ′, and the outer shape of the cavity unit 7 can be shortened. .

  Next, a manufacturing process of the head unit 2 configured as described above will be described.

  First, the manufacturing process of the reinforcement frame 40 is demonstrated using FIG. As shown in FIGS. 5 (a) and 5 (b), the reinforcement frame 40 has a predetermined thickness t from a metal tube 49 having a predetermined shape and extending in an elongated direction with respect to an axis C to be described later. At an inclination angle θ, for example, a laser beam or the like is used for cutting and manufacturing. The metal tube 49 has a substantially rectangular vertical cross section and is provided with four rows of substantially circular cavities 48 in a plan view that can serve as the ink passages 41, and the openings 40a are adjacent to each other in the X direction. A hollow portion 47 having a rectangular shape in plan view is formed, and each of the hollow portions 48 and 47 is a hollow rectangular parallelepiped metal tube continuously extending in the direction of the central axis C in the longitudinal direction of the metal tube. is there. The reinforcing frame 40 can be freely designed in terms of the outer shape of the reinforcing frame 40 and the dimensions of the openings 40a and the ink passages 41 by cutting out the angle of inclination θ to be cut and the desired thickness t. Therefore, it can be adapted to the specifications of various cavity units 7 and ink jet printer heads 1 and the degree of design freedom is increased. The dimensions of each part of the reinforcing frame 40 formed by cutting are calculated by a simple trigonometric function and addition / subtraction method using each dimension value of the original metal tube 49, the cutting inclination angle θ, and the thickness t. The metal tube 49 is made of, for example, a material such as SUS430, and is manufactured by publicly known extrusion molding or pultrusion so that a rectangular parallelepiped having a vertical sectional view has the shape described above.

  The reinforcing frame 40 manufactured in this way is inclined in the thickness direction as described above, and the ink passage 41 and the opening 40a are also inclined and bored (FIG. 5C). Then, the cut A-side surface of the reinforcing frame 40 is bonded to the front head unit 100, the B-side is directed toward the ink storage chamber 5, and the ink passage 41 is connected so as to be licked outward from the ink supply port 17. The

  When the reinforcing frame 40 is manufactured by this manufacturing method, the interval between the ink passage 41 and the opening 40a can be set regardless of the plate thickness and width. Further, the outer shape of the reinforcing frame 40 can be reduced, and the width between the ink supply port 17 and the opening 40a is shortened while having the flat surface 40 of the frame 40 that can compress the elastic member 6 and seal ink leakage. Therefore, the ink jet printer head can be shortened.

  The front head unit 100 is prepared by separately fabricating a cavity unit 7 in which a plurality of plates are laminated and bonded, and a plurality of ceramic layers and actuators 8 in which a plurality of ceramic layers and electrodes 32 and 33 are laminated and bonded together. It is manufactured by bonding the flexible wiring member 60 to the upper surface. In the reinforcing frame 40 manufactured as described above, the adhesive sheet is transferred to the lower surface side in advance, the ink supply port 17 and the opening end 41b of the ink passage 41 are aligned, and the actuator 8 from the opening 40a. And the flexible wiring member 60 are exposed and pressed and heated by the front head unit 100 to be bonded and fixed. In this way, the ink jet printer head 1 is manufactured.

  The inkjet printer head 1 is bonded and fixed to the lower surface side of the bottom plate 20c of the head holder 20 with, for example, a UV adhesive. At this time, the opening end 41a of the ink passage 41 of the reinforcing frame 40 is opened from the opening 20d of the head holder 20. Appears upwards.

A heat radiating plate 30 is attached to the bottom plate 20 c of the head holder 20, and then the ink storage chamber 5 is mounted inside the head holder 20. In the ink storage chamber 5, the opening end 41 a of the ink passage 41 of the reinforcement frame 40 and the ink outlet 5 g of the ink storage chamber 5 are aligned with the elastic member 6 interposed therebetween, and the reinforcement frame is fixed by the screw 5 b as described above. 40 is fixed. The flexible wiring member 60 is wired to the circuit board 50 along the wall 20 a of the head holder 20 through the slit 20 c 1 of the bottom plate 20 c of the head holder 20, and the circuit board 50 is installed on the head holder 20.

2 is an exploded perspective view of a front head unit 100. FIG. 4 is an exploded perspective view of the head unit 2. FIG. It is AA sectional drawing of FIG. It is a figure which shows the connection of the front head unit 100, the reinforcement frame 40, and the ink outflow port 5a. (A) It is a figure which shows the manufacturing process of the reinforcement frame 40. FIG. (B) It is DD sectional drawing of (a). (C) The cut reinforcing frame 40.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inkjet printer head 2 Head unit 5 Ink storage chamber 5a Ink outlet 6 Elastic member 7 Cavity unit 8 Actuator 17 Ink supply port 20 Head holder 40 Reinforcement frame 40a Opening
41 Ink passage 49 Metal tube

Claims (5)

Nozzles arranged in a plurality of rows for ejecting ink;
A cavity unit including an ink supply port for supplying ink to the nozzle;
In a manufacturing method of an ink jet printer head comprising a connecting pipe having an ink passage connected to the ink supply port,
The connecting pipe is formed by cutting a material having a cavity longer than the ink passage in a direction inclined with respect to the central axis direction of the cavity,
A method for manufacturing an ink jet printer head, comprising: joining the cavity unit so that a central axis of an ink passage of the cut connecting pipe is directed outwardly from the ink supply port. The cavity unit has a flat plate shape in the row direction of the nozzles, and an actuator for applying pressure for ejecting ink from the nozzles is provided on the back surface thereof.
The ink supply port is provided on one end side of the back surface of the cavity unit,
The cut connection pipe is formed as a part of a flat reinforcing frame along a back surface of the cavity unit, and the reinforcing frame has a frame shape in which an opening is formed adjacent to the ink passage. In the manufacturing method of the inkjet printer head of Claim 1,
The material is formed by forming two adjacent cavities serving as ink passages of the opening and the connecting pipe longer than the openings and the ink passage, and the material is arranged in the direction of the central axis of each cavity. Forming the reinforcing frame by cutting in a direction inclined with respect to
An ink jet printer head manufacturing method, wherein the cut reinforcing frame is joined to the cavity unit so that the ink passage is connected to the ink supply port and the actuator is exposed from the opening.   3. The method of manufacturing an ink jet printer head according to claim 2, wherein the material is made of metal.   4. The method for manufacturing an ink jet printer head according to claim 1, wherein the material is formed by extrusion molding or pultrusion molding. 5. The ink jet printer head manufacturing method according to claim 1, wherein a flat surface is formed around the ink passage to cut the material, and ink is supplied to the ink passage connected to the ink supply port. An ink jet printer head manufacturing method, wherein an ink storage chamber for supplying ink to the cavity unit through the ink passage is brought into contact with a flat surface opposite to the mouth.

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