JP5332425B2 - Flow path plate, droplet discharge head, liquid cartridge, image recording apparatus, and method of manufacturing droplet discharge head - Google Patents

Flow path plate, droplet discharge head, liquid cartridge, image recording apparatus, and method of manufacturing droplet discharge head Download PDF

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JP5332425B2
JP5332425B2 JP2008231366A JP2008231366A JP5332425B2 JP 5332425 B2 JP5332425 B2 JP 5332425B2 JP 2008231366 A JP2008231366 A JP 2008231366A JP 2008231366 A JP2008231366 A JP 2008231366A JP 5332425 B2 JP5332425 B2 JP 5332425B2
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partition
flow path
plate
droplet discharge
discharge head
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JP2010064316A (en
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好三 浦崎
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株式会社リコー
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Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the twisting of a partition wall occurred in a flow path plate manufactured through press-work in a liquid droplet delivering head. <P>SOLUTION: (a) A support projecting part 106 is formed on the undersurface of a support 104, and a lower part stage projecting part 108 is formed on the upper face of a lower part stage 105. A flow path plate material 101 is sent on the lower part stage 105 from the right side. (b) The flow path plate material 101 is pressed with the support 104 and the lower part stage 105. In this instance, a recessed part 107 of the partition wall is formed on the upper face of the partition wall through plastic deformation with the support projecting part 106, and a recessed part 109 of the partition wall is formed on the undersurface of the partition wall through plastic deformation with the projecting part 108 of the lower part stage. In addition, internal stresses A and B rotating to the left side against the central axis of the partition wall are generated with these recessed parts 107 and 109 and they counteract each other to reduce a moment force for twisting the partition wall 102 to zero. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a droplet discharge head used in a printer, a fax machine, a projector, and the like, a method for manufacturing the droplet discharge head, a flow path plate constituting the droplet discharge head, a liquid cartridge using the droplet discharge head, and inkjet recording The present invention relates to an image recording apparatus such as an apparatus.

  Examples of the droplet discharge head include a droplet discharge head that discharges a liquid resist as droplets, a droplet discharge head that discharges a DNA sample as droplets, and a droplet discharge head that discharges ink as droplets. Among them, an ink jet recording apparatus used as an image recording apparatus (image forming apparatus) such as a printer, a facsimile, a copying apparatus, or a plotter has a nozzle plate that ejects ink droplets and an individual liquid chamber (ink flow path) that communicates with the nozzle plate. And an ink jet head as a droplet discharge head equipped with a drive means (pressure generating means) for pressurizing ink in the liquid chamber. Is. Below, it demonstrates centering on the said inkjet head. As the ink jet head, the driving means is based on a piezoelectric element (hereinafter referred to as “piezoelectric type”) (for example, refer to Patent Document 1) or electrostatic force (hereinafter referred to as “electrostatic type”) (for example, patent). And the like (see, for example, Patent Document 3) due to bubble pressure (hereinafter referred to as “bubble type”).

In recent years, the market for inkjet printers is expanding for office use and for photographic printing at home, and there is an increasing demand for printing with high image quality, high speed, and high reliability.
In addition to the improvement in printing performance and quality described above, there is a strong demand for reducing the cost of printers, and there are technical hurdles for heads that require particularly advanced technology among the parts that make up printers. As a result, the company tends to increase costs, and each company is working on various cost reduction measures. Among them, a method has been proposed in which SUS material is applied to the ink flow path forming component, each part of the flow path is formed by a thin plate using press processing, and these thin plates are formed by lamination with an adhesive material ( For example, see Patent Documents 4, 5, and 6).

  In Patent Document 4, an elastic plate is bonded to one surface of a flow path forming substrate, and a nozzle plate is bonded to the other surface, so that the liquid supply port, the pressure chamber, and the nozzle communication port are passed from the reservoir. A flow path unit provided with a series of liquid flow paths leading to the nozzle opening, and a case in which the flow path unit is joined to the front end surface and the pressure generating element is housed therein, and the pressure generating element In the liquid ejecting head that changes the volume of the pressure chamber by partially displacing the elastic plate, the flow path forming substrate is a metal in which an elongated pressure chamber empty portion that becomes the pressure chamber is provided as a through-hole by press working A first plate made of metal, and a second metal plate provided with a first communication port vacant portion serving as a part of the nozzle communication port and a reservoir vacant portion serving as the reservoir as a through hole formed by pressing, And a third plate provided with the liquid supply port as a through-hole penetrating in the plate thickness direction, and at least a part of the reservoir empty portion is the The first plate and the second plate are arranged so as to be arranged inside the pressure chamber longitudinal direction from the liquid supply side tip of the pressure chamber empty portion, and between the first plate and the second plate. The liquid ejecting head is characterized in that the plates are bonded to each other with the third plate interposed therebetween, and the liquid supply side end of the pressure chamber empty portion and the reservoir empty portion communicate with each other through the liquid supply port.

  Moreover, what is described in Patent Document 5 is that a plurality of nozzles, a cavity unit having a pressure chamber for each nozzle, and pressure is applied to the ink in each of the pressure chambers to eject ink from the nozzles. In the ink jet printer head comprising an actuator, the cavity unit includes a base plate in which the pressure chamber is formed, a manifold plate in which a manifold chamber for introducing ink supplied from an ink supply source into the pressure chamber is formed. A damper plate having a damper wall is laminated on a portion facing the manifold chamber, and the damper plate is inserted in contact with the upper or lower side of the manifold plate, and a partition wall is formed on the portion facing the manifold chamber. A plate having a plurality of recesses adjacent to each other with a gap An ink jet printer head comprising a thin film material constituting a flexible damper wall that partitions the manifold chamber and the recess.

In Patent Document 6, a flow path forming member that forms a liquid chamber that communicates with a nozzle and a nozzle plate that forms the nozzle and / or a vibration plate that forms the wall surface of the liquid chamber are joined together. In the liquid droplet ejection head, the flow path forming member is formed of a silicon substrate, and a closed etching region that does not communicate with the outside on the bonding surface of the flow path forming member with the nozzle plate and / or the bonding surface with the vibration plate The droplet discharge head is characterized in that the etching region is surrounded by a <111> plane.
Japanese Patent Laid-Open No. 02-51734 Japanese Patent Laid-Open No. 05-50601 Japanese Patent Publication No. 61-59911 Japanese Patent Laid-Open No. 2004-230680 JP 2006-347036 A JP 2004-160827 A

  In press working, there is a great merit in terms of cost, but on the other hand, it is necessary to pay attention to the influence of processing deformation. For example, when the flow path portion of the flow path plate forming the individual liquid chamber is punched out by a press, the partition wall is twisted when the machining punch is reciprocated. This twist becomes a cause of bonding failure when the flow path plate is bonded to the nozzle plate or the vibration plate with an adhesive. In addition, the flow path stack volume is non-uniform, which causes discharge failure. However, Patent Documents 4, 5, and 6 do not describe these problems.

  This invention is made | formed in view of such a condition, and it aims at eliminating the twist of a partition also in the metallic flow path plate manufactured by press work.

The flow path plate of the present invention includes a nozzle plate having a plurality of nozzle holes, a flow path plate made of metal having partition walls that define a plurality of flow paths that respectively communicate with the plurality of nozzle holes, and a plurality of flow paths. A flow path plate in a droplet discharge head having a pressure generating portion for generating pressure on the partition wall, and the partition provided between the flow paths is provided with a recess formed by plastic deformation , and the recess is a nozzle of the partition wall Provided on both surfaces of the hole side surface and the opposite surface, and provided at a position shifted from the central portion of the partition wall in the flow path arrangement direction. It passes through the center point of the partition wall in a cross-sectional view as viewed from the short direction of the partition wall in which the flow path is arranged, and is on the opposite side to the straight line parallel to the short direction of the partition wall, and further passes through the center point, A straight line parallel to the short direction of the partition And it is characterized in the positional relationship near Rukoto on the opposite side of the interlinked linearly.

  The liquid droplet ejection head of the present invention is characterized by having the above-mentioned flow path plate.

  The droplet cartridge of the present invention has the droplet discharge head, and is characterized by integrating the droplet discharge head and a liquid tank that supplies liquid to the droplet discharge head.

  An image recording apparatus of the present invention includes the above-described droplet cartridge.

A method for manufacturing a droplet discharge head according to the present invention includes a nozzle plate having a plurality of nozzle holes, a flow path plate made of a metal having partition walls that define a plurality of flow paths communicating with the plurality of nozzle holes, and a plurality of flow path plates. A liquid droplet ejection head having a pressure generating section that individually generates pressure in the flow path , the nozzle hole side surface of the partition wall provided between the flow paths of the flow path plate and the opposite side With respect to a straight line passing through the center point of the partition wall in a cross-sectional view as viewed from the short side direction of the partition wall in which the channel is arranged on the channel plate and parallel to the short side direction of the partition wall Forming a recess by plastic deformation so as to be in a positional relationship on the opposite side with respect to a straight line that is on the opposite side and that passes through the center point and is orthogonal to the straight line parallel to the short direction of the partition ; The process of punching and forming , It is characterized in that it has a.

  According to the present invention, even in a metallic flow path plate manufactured by press working, a flow path plate plate is obtained in which the partition walls are not twisted, and no poor bonding or discharge failure occurs, whereby high-quality printing can be performed. It becomes possible.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a flow path plate manufacturing process according to this embodiment and a conventional flow path plate manufacturing process. Hereinafter, description will be made with reference to the diagram shown in FIG.

FIG. 11 shows a manufacturing process according to the prior art in which a flow path plate is formed by pressing using a SUS material. First, as shown in FIG. 11A, the flow path plate material 101 is fed onto the lower stage 105 from the right side of the figure. Next, as shown in FIG. 11 (b), the flow path plate 101 at a specified position stopping the flow path plate material 101 support 104 is lowered is pressed between the lower stage 105. Then, as shown in FIG. 11 (c), the punch 103 for forming the flow path is lowered to punch out the flow path plate material 101 to form one flow path 101a. At the time of punching (when the punch is lowered), the punch 103 moves so as to rub against the side surface of the partition wall 102 on one side. Works.

  Therefore, as shown in FIG. 11 (d), when the punching of the channel 101a is completed, the punch 103 and the support 104 are raised, and the channel plate material 101 becomes free, the partition wall 101 is twisted by this internal stress. Will occur. FIG. 12 shows the channel plate material 101 in which the channel 101a and the partition wall 101 are formed.

  On the other hand, the manufacturing process of the flow-path plate which concerns on this embodiment is demonstrated using Fig.1 (a)-(d) of the left side of FIG. In FIG. 1, the main part is shown in an enlarged manner for easy explanation. For comparison, an enlargement of the prior art of FIG. 11 corresponding to FIGS. 1A to 1D is shown on the right side of FIG.

  First, as shown in FIG. 1A, a support convex portion 106 is formed on the lower surface of the support 104. The support convex portion 106 is disposed at a position that is off the center of the partition wall 102 with respect to the partition wall 102 of the flow path plate and is in contact with the partition wall 102 on the side farther from the punch 103. In this state, the channel plate material 101 is sent onto the lower stage 105 from the right side of the figure. Here, as the flow path plate plate material 101, SUS304 and a plate thickness of 50 μm were applied.

  Next, as shown in FIG. 1B, the flow path plate material 101 is pressed by the support 104 and the lower stage 105. At this time, a partition recess 107 is formed in the partition wall 102 by plastic deformation by the support protrusion 106, and thereby an internal stress B is generated in the partition wall 102 so as to rotate to the left with respect to the center axis of the partition wall. The recess 107 is formed on the upper surface of the partition wall 102, that is, the nozzle side surface in the droplet discharge head using the flow path plate.

  Next, as shown in FIG.1 (c), it punches with the punch 103 and forms a flow path. At the time of punching (when the punch is lowered), the punch 103 moves so as to rub against the side surface of the partition wall 102 on one side, so that the partition wall 102 has an internal stress A that tends to rotate to the right side with respect to the center axis of the partition wall as illustrated. Works. Since the internal stress A and the internal stress B act in directions opposite to each other, the internal stress A and B cancel each other, and the moment force that twists the partition wall 102 becomes zero.

  Next, as shown in FIG. 1D, when the punch 103 and the support 104 are raised, the flow path 101a is formed. Next, the flow path plate material 101 is advanced to the left by a predetermined amount (one bit). At this time, the flow path plate material 101 is free, but since the moment force for twisting the partition wall 102 is zero as described above, the partition wall 102 is formed without being twisted. A recess 107 is formed on the upper surface of the partition wall 102.

  By repeating the above operation, a flow path plate having a plurality of flow paths 101a provided with the recess 107 in the partition wall 102 can be obtained. The press feed speed was about 100 shots / min.

  As shown in FIG. 3, when the concave portion 107 is joined to another plate, for example, the nozzle plate 200 or the like, with the adhesive 202, the concave portion 107 becomes a relief portion of the adhesive 202, and the adhesive 202 protrudes into the flow path. The effect that can be prevented can be achieved at the same time. In addition, since the recess 107 is formed at the same time as the flow path is formed, it is not necessary to increase the number of processes, and the manufacturing cost can be reduced. In addition, 201 is a diaphragm, 109 is a recessed part, and it demonstrates in Embodiment 2 mentioned later.

  According to the present embodiment, since the recess 107 exists, the material hardness can be increased by work hardening by plastic deformation, and cross toe can be prevented. In addition, the recess 107 can form an escape portion for the adhesive. Further, since the recess 107 is formed at the same time as the flow path formation, a low-cost flow path plate can be obtained.

(Embodiment 2)
FIG. 2 shows an example of the manufacturing process of the flow path plate according to the present embodiment. In the present embodiment, the flow path plate manufacturing process will be described with reference to FIG.

  First, as shown in FIG. 2A, a support convex portion 106 is formed on the lower surface of the support 104. The support convex portion 106 is disposed at a position that is off the center of the partition wall 102 with respect to the partition wall 102 of the flow path plate and is in contact with the partition wall 102 on the side farther from the punch 103. A lower stage convex portion 108 is also formed on the upper surface of the lower stage 105. The lower stage convex portion 108 is arranged on the side near the punch 103, which is off the center of the partition wall 102 with respect to the partition wall 102 of the flow path plate.

  In this state, as shown in FIG. 2A, the channel plate material 101 is sent onto the lower stage 105 from the right side of the figure. Next, as shown in FIG. 2 (b), the flow path plate material 101 is pressed by the support 104 and the lower stage 105. At this time, the partition recess 107 is formed in the upper part of the partition by the support protrusion 106 by plastic deformation. In addition, a partition wall recess 109 is formed by plastic deformation at the bottom of the partition wall by the lower stage projection 108. As a result, an internal stress B is generated which tends to rotate to the left with respect to the central axis of the partition wall. The concave portions 107 and 109 are in a mirror inversion positional relationship with respect to the center of the partition wall. The recess 109 is formed on the surface opposite to the surface on which the recess 107 of the partition wall is provided.

  Next, as shown in FIG. 2 (c), a punching channel portion is formed by the punch 103. At the time of punching (when the punch is lowered), the punch 103 moves so as to rub against the side surface of the partition wall 102 on one side. Therefore, the partition wall 102 has an internal stress A that tends to rotate to the right side with respect to the center axis of the partition wall as illustrated. Works. Since these internal stress A and internal stress B act in opposite directions, these internal stresses cancel each other and the moment force that twists the partition wall 102 becomes zero.

  Next, the punch 103 and the support 104 are raised, and the flow path plate material 101 is advanced to the right by a predetermined amount (one bit). At this time, the flow path plate material 101 is free, but since the moment force for twisting the partition wall 102 is zero as described above, the partition wall 102 is formed without being twisted. In addition, since the concave portions 107 and 109 are formed on both the upper and lower surfaces of the partition wall 102, the balance between the processing stresses above and below the partition wall can be maintained, and the partition wall 102 can be prevented from warping in the longitudinal direction.

  As shown in FIG. 3, when the concave portions 107 and 109 are joined to another plate, for example, the nozzle plate 200 or the vibration plate 201 with an adhesive 202, they serve as escape portions for the adhesive 202, and the adhesive 202 is a flow path. At the same time, it is possible to prevent the protrusion from occurring inside. In addition, since the recess 107 is formed at the same time as the flow path is formed, it is not necessary to increase the number of processes, and the manufacturing cost can be reduced.

  In addition, about the shape and arrangement | positioning of the recessed parts 107 and 109, various cases can be considered with the material, processing conditions, etc. of a flow-path plate. A representative example in the case of the recess 107 is shown in FIG. FIG. 5 shows the occurrence of warpage when the recess 107 is formed and when the recesses 107 and 109 are formed. The formation of two recesses is clearly less warped.

  According to the present embodiment, the recesses 107 and 109 can prevent the flow path plate from warping. Due to the two recesses, it is possible to generate a stress in the opposite direction to the stress that twists the partition generated when the flow path is formed, and to prevent the partition from being twisted.

(Embodiment 3)
FIG. 6 shows an example of the manufacturing process of the flow path plate according to the present embodiment. In the present embodiment, an example of the manufacturing process of the flow path plate will be described with reference to the drawing shown in FIG.

  First, as shown in FIG. 6A, a support convex portion 106 is formed on the support 104. The support convex portion 106 is disposed at a position in contact with the partition wall on the side farther from the punch 103 than the center of the partition wall 102 with respect to the partition wall 102 of the flow path plate. In this state, as shown in FIG. 6A, the flow path plate material 101 is sent to the lower stage 105 from the right side of the figure.

  Next, as shown in FIG. 6B, the support 104 is lowered, and the flow path plate material 101 is pressed by the support 104 and the lower stage 105. Accordingly, the partition recess 107 is formed on the upper surface of the partition wall by the support protrusion 106 by plastic deformation, and at the same time, the unevenness of the upper and lower surfaces of the partition wall can be flattened in this pressing step.

  Next, as shown in FIG. 6C, the punch 103 is lowered and punched to form a flow path portion. Then, the punch 103 is raised as shown in FIG. 6 (d), and the support 104 is raised as shown in FIG. 6 (e). In this way, the flow path plate is formed by the two steps of forming the recess on the partition wall and forming the flow path section, whereby a flow path plate having a partition wall with flat upper and lower surfaces of the partition wall can be obtained. In addition, since the thickness of the flow path plate is not affected, the punch and the support can be used as a general-purpose tool, and a low-cost flow path plate can be obtained.

  According to the present embodiment, since the upper and lower surfaces of the partition walls are pressed, the unevenness of the upper and lower surfaces of the partition walls can be flattened. Since the partition wall concave portion and the flow path portion can be formed separately, the degree of freedom in design and manufacturing increases.

(Droplet ejection head)
FIG. 7 shows an example of a droplet discharge head according to this embodiment. In the present embodiment, a droplet discharge head will be described with reference to the diagram shown in FIG.

  In FIG. 7, the droplet discharge head includes a flow path unit 9 in which a plate 8 having a communication pipe portion 8a formed thereon is joined to the flow path plate 1 according to the first to third embodiments, and a piezoelectric pressure generating mechanism. And a nozzle plate. This droplet discharge head will be described.

  The piezoelectric pressure generating mechanism includes a piezoelectric element 12 and an FPC cable 35 that is bonded to the piezoelectric element 12 and applies a voltage. The piezoelectric element 12 includes a lead zirconate titanate (PZT) piezoelectric layer 31 having a thickness of 10 to 50 μm / layer, and an internal electrode layer 32 made of silver and palladium (AgPd) having a thickness of several μm / layer. The internal electrodes 32 are alternately stacked, and are electrically connected to the individual electrodes 33 and the common electrode 34 which are the end face electrodes (external electrodes) of the end faces alternately. The pressurized liquid chamber 6 (flow path) is contracted and expanded via the diaphragm 3 by expansion and contraction of the piezoelectric element 12 whose piezoelectric constant is d33. The piezoelectric element 12 expands when a drive signal is applied and is charged, and contracts in the opposite direction when the charge charged in the piezoelectric element 12 is discharged.

  Note that the end face electrode on one end face of the piezoelectric element member is divided by dicing by half-cut to form individual electrodes 33, and the end face electrode on the other end face is not divided by a restriction such as notch and is not divided by all the piezoelectric elements 12. The conductive common electrode 34 becomes conductive.

  An FPC cable 35 is connected to the individual electrode 33 of the piezoelectric element 12 by solder bonding, ACF (anisotropic conductive film) bonding, or wire bonding in order to give a drive signal, and each piezoelectric element 12 is connected to the FPC cable 35. A drive circuit (driver IC) for selectively applying a drive waveform is connected. The common electrode 34 is connected to a ground (GND) electrode of the FPC cable 35 by providing an electrode layer at the end of the piezoelectric element 12 and turning it around. A nozzle cover 7 is disposed so as to surround the nozzle plate 2.

  In such a droplet discharge head including the nozzle plate 2 and the piezoelectric pressure generating mechanism and the flow path plate 1 shown in the first to third embodiments, for example, a drive waveform ( 10 to 50 V), the piezoelectric element 12 is displaced in the stacking direction, and the ink in the pressurized liquid chamber 6 formed in the flow path plate 1 via the diaphragm 3 is individually separated. The pressure is increased to increase the pressure, and ink droplets are ejected from the nozzle holes 4 formed in the nozzle plate 2 through the communication pipe portion 8a.

  According to the present embodiment, it is possible to obtain a highly reliable and low-cost droplet discharge head having excellent discharge stability.

(Liquid cartridge)
FIG. 8 shows an example of a liquid cartridge according to this embodiment. In the present embodiment, the liquid cartridge 50 will be described with reference to FIG.

  The liquid cartridge 50 is obtained by integrating the integrated droplet discharge head 52 of any of the above embodiments having a nozzle 51 and the like, and a liquid tank 53 that supplies liquid to the droplet discharge head 52. is there. Thus, in the case of the liquid tank integrated head, the performance of the head immediately leads to the performance of the entire liquid cartridge. Therefore, by using the droplet discharge head, a high-quality and high-speed liquid cartridge can be achieved. it can.

  According to the present embodiment, it is possible to provide a highly reliable and low-cost liquid cartridge excellent in ejection stability.

(Recording device)
An ink jet recording apparatus using the serial type integrated droplet head according to the present embodiment will be described with reference to FIGS. FIG. 9 is a perspective explanatory view showing an example of a recording apparatus, and FIG. 10 is a side explanatory view showing an example of a mechanism portion of the recording apparatus.

  The ink jet recording apparatus includes a carriage movable in the main scanning direction inside the recording apparatus main body 81, a recording head including the ink jet head according to the above-described embodiment mounted on the carriage, an ink cartridge for supplying ink to the recording head, and the like. A sheet feeding cassette (or a sheet feeding tray) 84 on which a large number of sheets 83 can be stacked from the front side is detachably attached to the lower part of the apparatus main body 81. In addition, the manual feed tray for manually feeding the paper 83 can be opened, the paper 83 fed from the paper feed cassette 84 or the manual feed tray is taken in, and the printing mechanism unit 82 After the image is recorded, it is discharged onto a discharge tray 86 mounted on the rear side.

  The printing mechanism 82 holds the carriage 93 slidably in the main scanning direction (the direction perpendicular to the paper in FIG. 7) with a main guide rod 91 and a sub guide rod 92 which are guide members horizontally mounted on left and right side plates (not shown). The carriage 93 is provided with a plurality of ink discharge heads 94 including the inkjet head according to the present embodiment that discharges ink droplets of yellow (Y), cyan (C), magenta (M), and black (Bk). Outlets (nozzles) are arranged in a direction crossing the main scanning direction, and are mounted with the ink droplet ejection direction facing downward. In addition, each ink cartridge 95 for supplying ink of each color to the head 94 is replaceably mounted on the carriage 93. The ink cartridge 95 has an air port that communicates with the atmosphere upward, a supply port that supplies ink to the inkjet head below, and a porous body filled with ink inside, and the capillary force of the porous body. Thus, the ink supplied to the inkjet head is maintained at a slight negative pressure. Further, although the heads 94 of the respective colors are used here as the recording heads, a single head having nozzles that eject ink droplets of the respective colors may be used.

  Here, the carriage 93 is slidably fitted to the main guide rod 91 on the rear side (downstream side in the paper conveyance direction), and is slidably mounted on the sub guide rod 92 on the front side (upstream side in the paper conveyance direction). doing. In order to move and scan the carriage 93 in the main scanning direction, a timing belt 100 is stretched between a driving pulley 98 and a driven pulley 99 that are rotationally driven by a main scanning motor 97, and the timing belt 100 is moved to the carriage 93. The carriage 93 is driven to reciprocate by forward and reverse rotation of the main scanning motor 97.

  On the other hand, in order to convey the paper 83 set in the paper feed cassette 84 to the lower side of the head 94, the paper feed roller 101 and the friction pad 102 for separating and feeding the paper 83 from the paper feed cassette 84 and the paper 83 are guided. A guide member 103, a transport roller 104 that reverses and transports the fed paper 83, a transport roller 105 that is pressed against the peripheral surface of the transport roller 104, and a leading end that defines a feed angle of the paper 83 from the transport roller 104 A roller 106 is provided. The transport roller 104 is rotationally driven by a sub-scanning motor 107 through a gear train. A printing receiving member 109 is provided as a paper guide member that guides the paper 83 sent from the transport roller 104 below the recording head 94 in accordance with the movement range of the carriage 93 in the main scanning direction. A conveyance roller 111 and a spur 112 that are rotationally driven to send the paper 83 in the paper discharge direction are provided on the downstream side of the printing receiving member 109 in the paper conveyance direction, and the paper 83 is further delivered to the paper discharge tray 86. A roller 113 and a spur 114, and guide members 115 and 116 that form a paper discharge path are disposed.

  At the time of recording, the recording head 94 is driven according to the image signal while moving the carriage 93, thereby ejecting ink onto the stopped sheet 83 to record one line. Record the line. Upon receiving a recording end signal or a signal that the trailing edge of the paper 83 has reached the recording area, the recording operation is terminated and the paper 83 is discharged. Further, a recovery device 117 for recovering defective ejection of the head 94 is disposed at a position outside the recording area on the right end side in the movement direction of the carriage 93. The recovery device 117 includes a cap unit, a suction unit, and a cleaning unit. The carriage 93 is moved to the recovery device 117 side during printing standby and the head 94 is capped by the capping means, and the ejection port portion is kept in a wet state to prevent ejection failure due to ink drying. Further, by ejecting ink that is not related to recording during recording or the like, the ink viscosity of all the ejection ports is made constant and stable ejection performance is maintained.

  When a discharge failure occurs, the discharge port (nozzle) of the head 94 is sealed with a capping unit, and bubbles and the like are sucked out from the discharge port with the suction unit through the tube. Is removed by the cleaning means to recover the ejection failure. Further, the sucked ink is discharged to a waste ink reservoir (not shown) installed at the lower part of the main body and absorbed and held by an ink absorber inside the waste ink reservoir.

  As described above, since the ink jet recording apparatus includes the ink jet head according to the present embodiment, it is possible to perform recording with high image quality and high speed. Further, because of the high speed, the power consumption of the entire inkjet recording apparatus can be reduced.

  In the above-described embodiment, an example of application to an inkjet head has been described. However, the present invention is not limited to this, and a droplet ejection head that ejects droplets other than ink, for example, a liquid resist for patterning. It is also possible to apply to.

  According to this embodiment, since the liquid droplet ejection head according to the above-described embodiment is mounted, it is possible to provide an ink jet recording apparatus having excellent productivity and high reliability and high image quality. .

  Although specifically described based on the preferred embodiments, the present invention is not limited to the above-described flow path plate, droplet discharge head, liquid cartridge, image recording apparatus, and droplet discharge head manufacturing method. Needless to say, various modifications can be made without departing from the scope of the invention.

It is a block diagram which shows the example of a manufacturing process of the flow-path plate by this embodiment, and the conventional manufacturing process. It is a block diagram which shows the example of a manufacturing process of the flow-path plate by this embodiment. It is a block diagram which shows the case where a nozzle plate and a diaphragm are adhere | attached on the flow-path plate. It is a block diagram which shows the example of the shape of a recessed part. It is the block diagram which compared the example in the case of one and two cases of a recessed part. It is a block diagram which shows the example of a manufacturing process of the flow-path plate by this embodiment. It is a block diagram which shows the example of the droplet discharge head by this embodiment. It is an external appearance perspective view which shows the example of the liquid cartridge by this embodiment. It is a schematic perspective view which shows the example of the inkjet recording device by this embodiment. It is a figure which shows the structural example of the inkjet recording device by this embodiment. It is a block diagram which shows the manufacturing process of the conventional flow-path plate. It is a block diagram which shows the flow-path plate by the conventional manufacturing process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flow path plate 4 Nozzle hole 9 Flow path unit 50 Liquid cartridge 51 Nozzle 52 Integrated liquid droplet discharge head 53 Liquid tank 81 Recording device main body 82 Printing mechanism part 93 Carriage 94 Inkjet head 101 Flow path plate material 101a Flow path 102 Bulkhead 103 Punch 104 Support 105 Lower stage 106 Support convex part 107, 109 Concave part 108 Lower stage convex part 200 Nozzle plate 201 Vibration plate 202 Adhesive

Claims (6)

  1. A nozzle plate having a plurality of nozzle holes, a flow path plate made of metal having partition walls defining a plurality of flow paths respectively communicating with the plurality of nozzle holes, and a pressure for generating pressure individually in the plurality of flow paths A flow path plate in a droplet discharge head having a generator,
    The partition provided between the flow paths is provided with a recess formed by plastic deformation ,
    The recess is provided on both the surface of the partition wall on the nozzle hole side and the surface on the opposite side, and is provided at a position shifted from the central portion of the partition wall in the flow path arrangement direction. The concave portions provided on both surfaces pass through the center point of the partition wall in a cross-sectional view as viewed from the short side direction of the partition wall where the flow channels are arranged in the flow channel plate, and are parallel to the short direction of the partition wall. a straight line on the opposite side of the further through the center point, the flow, characterized in positional relationship near Rukoto on the opposite side of the straight line perpendicular to a straight line parallel to the transverse direction of the partition wall Road plate.
  2. A liquid droplet ejection head comprising the flow path plate according to claim 1 .
  3. A liquid cartridge comprising the liquid droplet ejection head according to claim 2, wherein the liquid droplet ejection head and a liquid tank that supplies liquid to the liquid droplet ejection head are integrated .
  4. An image recording apparatus comprising the liquid cartridge according to claim 3 .
  5. A nozzle plate having a plurality of nozzle holes, a flow path plate made of metal having partition walls defining a plurality of flow paths respectively communicating with the plurality of nozzle holes, and a pressure for generating pressure individually in the plurality of flow paths A droplet discharge head manufacturing method for manufacturing a droplet discharge head having a generator,
    The partition wall provided between the channels of the channel plate on both sides of the surface on the nozzle hole side and the surface on the opposite side of the partition wall, wherein the channel is arranged on the channel plate. Passing through the central point of the partition wall in a cross-sectional view seen from the short side direction and on the opposite side to the straight line parallel to the short side direction of the partition wall, and further passing through the central point and passing through the central point Forming a recess by plastic deformation so as to be in a positional relationship opposite to a straight line orthogonal to a straight line parallel to the direction;
    Method for manufacturing a droplet discharge head is characterized in that and a step of punching forming the flow path by press working.
  6. 6. The method of manufacturing a droplet discharge head according to claim 5, wherein the step of forming the concave portion by the plastic deformation and the step of punching and forming the flow path by press working are performed simultaneously .
JP2008231366A 2008-09-09 2008-09-09 Flow path plate, droplet discharge head, liquid cartridge, image recording apparatus, and method of manufacturing droplet discharge head Expired - Fee Related JP5332425B2 (en)

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