JPH01178452A - Ink-jet recorder and manufacture thereof - Google Patents

Abstract

PURPOSE:To form precisely the thickness dimension of a gap of an ink discharge part, by a method wherein the gap dimensions of an ink accommodating part communicating with the ink discharge part are set to be larger than the gap dimensions on the ink discharge part side in a slit-shaped space, and an upper-side base plate is divided into a base plate main body forming the ink accommodating part and a plate- shaped member forming the ink discharge part. CONSTITUTION:A slit-shaped space 1 comprises an ink accommodating part 9 accommodating ink 3 and an ink discharge part 10 opening on one end side in the width direction of base plates 7 and 8 and discharging the ink 3, and the gap dimensions on the ink accommodating part 9 side communicating with the ink discharge part 10 are set to be larger than the gap dimensions on the ink discharge part 10 side. An upper-side base plate 7 is divided into and constructed of an upper-side base plate main body 12 having a recessed place 11 forming the ink accommodating part 9 and a plate-shaped member 13 forming the ink discharge part 10. The thickness dimension lS of the ink discharge part 10 is determined by the thickness of the plate-shaped member 13. By using the plate-shaped member 13 having a prescribed thickness, the thickness dimension lS of the ink discharge part 10 can be formed precisely, and thereby the quantity of the ink 3 discharged from the ink discharge part 10 is made a prescribed one.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to an inkjet recording device and a method of manufacturing the same, and particularly relates to an inkjet recording device having a slit-like space in which ink stored inside the inkjet recording device is ejected. This invention relates to a device and its manufacturing method.

[Prior art 1] A conventional inkjet recording device has a number of ink ejection devices that seal ink, and ejection ports (
It is known that the ink ejecting device is provided with an orifice, and a pressure pulse is appropriately applied to the ink ejecting device to eject ink from the ejecting port.

In this type, it is difficult to downsize the ink ejection device because it is necessary to maintain a large volume ratio between the ejection port and the ink ejection device in order to maintain the ink ejection operation from the ejection port. However, it is necessary to increase the pitch between the ejection ports to some extent, making it impossible to set a high image recording density. Therefore, there is a problem that the recording speed inevitably decreases.

Therefore, as a means to solve this problem, ink is filled in a slit-like space formed by a pair of insulating substrates arranged in parallel to each other, and an electrode array and a recording sheet are provided in this slit-like space. A so-called flat inkjet recording device (Japanese Patent Laid-Open No. 56-37163) that forms an electric field pattern between electrodes facing each other via a wafer, and causes ink to fly toward the recording sheet in accordance with this pattern.
As shown in FIGS. 16 and 17, there is a head main body 43 formed by a pair of insulating substrates 40 and 41 facing each other and having a slit-shaped space 42, and an ink 44 accommodated in the slit-shaped space 42. and an electrostatic field forming means 47 that forms a predetermined electrostatic field between the ink surface and the recording sheet 46. A so-called thermoelectrostatic inkjet recording device has already been proposed, which applies heat energy according to the amount of heat generated and causes the heated ink portion to fly toward the recording sheet 46 based on a predetermined electrostatic field.

By the way, in this type of flat inkjet recording device or thermostatic recording device, ink is used.

By setting the gap size of the slit-like space for accommodating the ink to be narrow, the surface tension of the ink itself within the slit-like space is used to prevent the ink from flowing out from the ink ejection part during non-recording. ing.

However, since the gap size of the slit-shaped space is set narrow, the proportion of the ink contained in this space that contacts the inner wall surface is high, and the flow resistance becomes large. The pressure means pressurizes the inside of the slit-like space to supply ink in the ink holding section to the ink discharge section. However, there was a problem in that the transportability was poor and the supply was unstable.

Therefore, when the printing operation of these printing apparatuses is sped up, there is a problem in that the amount of ink supplied cannot keep up with the consumption of ink consumed by the ink ejecting section, so that printing errors are likely to occur.

This problem is particularly noticeable in thermoelectrostatic inkjet recording devices that use relatively high viscosity ink.

Therefore, the present applicant has already proposed something as shown in Japanese Patent Application No. 182382/1982 as a solution to the above problems.

That is, as shown in FIG. 18 and FIG.
A head main body 54 having a slit-like space 53 formed by and containing ink 52, and a head body 54 that selectively moves each ink unit area toward the recording sheet side in accordance with image information for each ink unit area according to pixel density. An ink ejecting section 58 in the slit-like space 53 is provided with an energy applying means 55 and 56 for applying energy for making the ink fly, and a recess 57 is formed on the opposing surface of at least one side 50 of the insulating substrate.
The gap size of the ink accommodating portion 59 communicating with the ink discharge portion 58 is set to be larger than the gap size of the side.

[Problems to be Solved by the Invention] However, such conventionally proposed devices have the following problems. That is, the slit-like space 5
The insulating substrate 50 for forming the ink ejection portion 58 of No. 3 is required to have ink resistance because it comes into direct contact with the ink 52, and the energy applying means 55 and 56 are required to have ink resistance.
2 by partially applying heat, electrostatic energy, etc. to the ink 5.
2, it is required to have high thermal conductivity in order to prevent heat accumulation in addition to being heat resistant. Therefore, as the material for the insulating substrate 50, ceramics, glass, etc. that meet these requirements are used.

Since such materials have poor workability, in order to form the recess 57 on the opposite surface of the insulating substrate 50, a plate-shaped member such as a plate glass or an alumina ceramic plate, which is the material of the insulating substrate 50, is coated with the material shown in FIG. As shown in FIG. 21, a recess 57 with a depth of 1 to 2 mm is formed in a predetermined shape by hydrofluoric acid etching, sandblasting, etc., and the ink discharge part 58 side of this plate member is cut as shown in FIG. By polishing the end portion, the portion of the plate-shaped member on the side of the ink discharge portion 58 is finished to a predetermined thickness I8 as shown in FIG.

Therefore, when the four parts 57 are formed on the insulating substrate 50 by sandblasting, as shown in an enlarged view in FIG.
Variations occur in the thickness dimension I8 of the ink ejection portion 58 of 0. Therefore, in the thicker portions of the ink ejection portions 58 of the insulating substrate 50, the flow path resistance of the ink 52 increases accordingly, resulting in a shortage of ink 52, whereas in the thinner portions, the flow path resistance of the ink 52 increases accordingly. This results in smooth supply of ink 52, resulting in a problem that the recording speed is not constant. Furthermore, when forming the recesses 57 in the insulating substrate 50 by hydrofluoric acid etching, the etching process is performed by placing a mask over the plate glass, but the edges of the mask are eroded by the processing liquid and the corners of the recesses 57 are Since the insulating substrate 50 is rounded, the thickness IS of the insulating substrate 50 cannot be formed to a predetermined value, and due to variations in etching time, etc., it is difficult to form the insulating substrate 50 to a predetermined value using the thickness 1 method. be. Further, when the insulating member is formed of plate glass, chips are likely to occur at the corners due to the polishing operation after cutting, and there is a problem in that ink flows out from the chipped parts. Furthermore, when alumina or the like is used, the problem of chipping is less likely to occur as with plate glass, but there are problems in that it is difficult to process and increases the processing cost.

[Means for Solving the Problems 1] Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, and its purpose is of course to speed up the recording operation. In particular, when forming a slit-like space using a substrate, an inkjet recording device that can form the thickness of the gap between the ink ejection parts with high precision, and that can be easily processed without causing defects in the insulating member. An object of the present invention is to provide a method for manufacturing the same.

That is, the inkjet recording device according to the present invention has the following features:
A pair of substrates are arranged oppositely along the longitudinal direction,
A head body having a slit-like space formed between both substrates, consisting of an ink storage section that accommodates ink and an ink discharge section that opens at one end in the width direction of the substrate and discharges ink; and an energy applying means for applying energy to selectively cause each ink unit area to fly from the ink ejection unit toward the recording sheet side in accordance with image information, and ink ejection in the slit-shaped space. An inkjet recording apparatus in which a gap size of an ink storage section communicating with the ink discharge section is set larger than a gap size of the ink storage section side, wherein one of the substrates is a substrate body for forming the ink storage section; It is configured to be divided into a plate-like member for forming an ink ejection section.

Further, in the method for manufacturing an inkjet recording device according to the present invention, a pair of substrates are disposed facing each other along the longitudinal direction, and an ink accommodating portion for accommodating ink is opened between the two substrates at one end in the width direction of the substrate. The head body has a slit-like space formed by an ink ejection section that ejects ink, and a head body that forms a slit-like space consisting of an ink ejection section that ejects ink from the ink ejection section. an energy applying means for applying energy for selectively ejecting the ink toward the recording sheet side, and the gap size of the ink storage section communicating with the ink discharge section is larger than the gap size of the ink discharge section side in the slit-shaped space. 1. A manufacturing method for manufacturing an inkjet recording device according to the present invention, wherein a plate material having a predetermined thickness is cut into a predetermined shape, and then the end surface of the substrate is polished to form the ink ejection portion. The method includes a step of creating a member, a step of creating a substrate body for forming the ink storage portion, and a step of fixing the plate-like member to the substrate body to create one of the pair of substrates. It is configured.

In such technical means, the head main body may be designed as appropriate as long as it has a slit-like space formed by a pair of substrates that are arranged facing each other along the longitudinal direction. Although this may be changed, considering the workability of arranging the electrode array for the electric field pattern or the thermal energy applying means, the pair of substrates on which the electrode array and the thermal energy applying means have been applied in advance may be replaced with a spacer member, such as a polyester film. , it is desirable that they be spaced apart with glass paste or the like interposed therebetween.

The substrate may be made of a highly rigid material having equivalent hardness, such as hard glass, ceramics, heat-resistant glass, etc.
Although a suitable material can be selected from hard plastic, silicon wafer, etc., in the case of a type in which a plurality of heating elements are disposed on one of the substrates, it is desirable that both groups of plates be made of a ceramic material with excellent thermal conductivity.

Further, one of the substrates is formed of a substrate body and a plate-like member, but the substrate body may be made of any material as long as it has ink resistance, and is made of a metal material, plastic, or the like. On the other hand, the plate member is made of, for example, hard glass, ceramics, heat-resistant glass, or the like.

Furthermore, the recess may be formed on one side of the substrate, or may be formed on both sides as desired, but by forming this recess, the gap size of the ink accommodating portion in the slit-like space is reduced. It is necessary to reduce the frictional resistance that acts per unit area of ink in the ink storage section by making the gap dimension larger than that of the ink discharge section that communicates with the ink storage section, and by lowering the proportion of ink in contact with the inner wall surface of the ink storage section. It is. Note that the longitudinal dimension of the slit-like space is appropriately set in consideration of the image forming range.

゛In addition, the energy applying means for applying energy to each ink unit area according to the pixel density in the slit-like space is provided on the substrate in the case of a flat ink cartridge or a 1-nit recording device, and is provided on the substrate between the ink surface and the recording sheet. This can be constructed by an electrostatic field forming means that forms an electric field pattern corresponding to the image information between the two.On the other hand, in a thermoelectrostatic inkjet recording device, it is provided on an insulating substrate, and a field pattern corresponding to the image information is formed between the On the other hand, a uniform electrostatic field can be formed between the thermal energy applying means that applies thermal energy corresponding to image information, the ink surface, and the recording sheet.

The thermal energy applying means in the thermoelectrostatic inkjet recording device may also be one that indirectly heats the ink using a heating element array consisting of a plurality of heating resistors arranged according to the pixel density. Of course, the ink having a predetermined resistivity can be suitably selected, such as one in which the ink itself is directly energized and heated.

Furthermore, the ink to be used may be appropriately selected as long as it reaches a flying state when a predetermined energy is applied. In this case, the specific ink flying conditions in the thermostatic inkjet recording device are that the viscosity and surface tension of the ink are reduced to such an extent that the ink can fly due to the acting electrostatic field;
Furthermore, it is necessary that the ink has improved electrical conductivity.

[Function 1] In the inkjet recording apparatus according to the present invention, one of the substrates is divided into the substrate main body for forming the ink storage section and the other plate-like member for forming the ink ejection section, so that the ink ejection The thickness of the part is determined by the thickness of the plate-like member, so by using a plate-like member with a constant thickness, the thickness of the ink ejection part can be formed with high precision, and the recording speed can be made uniform. can do.

Further, in the method for manufacturing an inkjet recording device according to the present invention, a plate-like member for forming an ink ejection portion and a substrate body for forming an ink storage portion are separately created, and the plate-like member is Since it is fixed to the substrate main body to constitute one side of the substrate, manufacturing can be easily performed and the thickness dimension of the ink ejection portion can be formed with high accuracy.

[Example] Hereinafter, an example in which the present invention is applied to a thermostatic inkjet recording apparatus will be described in detail with reference to the drawings.

First Embodiment As shown in FIGS. 1 and 2, an inkjet recording apparatus according to this embodiment includes a head body 2 having a slit-shaped space 1, and an ink 3 accommodated in the slit-shaped space 2. Thermal energy applying means 4 for applying thermal energy by
and an electrostatic field forming means 6 for forming a predetermined electrostatic field between the ink surface and the recording sheet 5.

First, the head main body 2 has a slit-like space 1 formed between both group plates 7 and 8 by arranging a pair of upper and lower substrates 7 and 8 facing each other along the longitudinal direction. ing. This slit-like space 1 consists of an ink storage section 9 that accommodates the ink 3, and an ink discharge section 10 that opens at one end in the width direction of the substrate 7.8 and discharges the ink 3. The gap size on the side of the ink storage section 9 communicating with the ink discharge section 10 is set larger than the gap size on the side.

In this embodiment, the upper substrate is divided into a substrate body for forming the ink storage section and a plate-like member for forming the ink discharge section. That is, as shown in FIG. 3, the upper substrate 7 includes an upper substrate main body 12 having a recess 11 for forming the ink storage section 9, and is fixed to the side of this upper substrate main body 12, and has an ink discharge section. 1
It is divided into a plate-like member 13 for forming 0. The upper substrate main body 12 is made of a metal material, plastic, etc. with a thickness of about 4 mm, and has a depth of about 2 mm on its lower surface.
A recess 11 with a diameter of mm is bored, and the ink ejection portion 10 side of this recess 11 is open. Further, in the upper substrate main body 12, ink 3 is stored in the ink storage portion 9 in the recess 11.
A supply port 14 for supplying the water is opened. on the other hand,
The plate member 13 is made of ceramics, glass, etc. with a thickness of 50 μm.
This plate-like member 13 is formed in a rectangular shape with a predetermined thickness 18 of about 1 m, and is fixed to the side surface of the substrate main body on the side where the recess 11 opens, thereby forming the upper substrate 7 . The lower substrate 8 disposed opposite the upper substrate 7 configured as described above is formed of an alumina ceramic plate or the like having a thickness of about 1 mm and having an under-bracing glass layer (not shown) about 60 μm thick on its surface. The lower substrate 8 is fixed to the front end of the recess 11 of the upper substrate 7 along the outer periphery of the recess 11 via a trowel-shaped spacer 15 made of polyester film having a thickness of 50 μm. An ink storage section 9 is formed by the recess 11 of the upper substrate main body 12 and the lower substrate 8, and an ink discharge section 10 is formed by the lower end surface of the plate-like member 13 and the lower substrate 8.

On the other hand, as shown in FIG. 1, the thermal energy applying means 4 is formed by depositing a film on the lower substrate 8 by a reactive sputtering method and by a photolithography method to form a film with a pixel density (
For example, a heating resistor 16 made of a Ta 2 N thin film with a thickness of about 300 angstroms every 8 dots/mm 2 .
It is composed of a heating element array formed by arranging 16... These heat generating resistors 16, 16... are formed so that the distance 11 from the end face of the lower substrate 8 is 50 μm, the length dimension I2 of the heat generating resistor 16 is 50 μm, and the width dimension 13 is 110 μm. . Each of the heating resistors 16 is disposed along the opening edge of one side of the slit-shaped space 1,
Approximately 500 angstroms of Ni-Cr and approximately 1 μm of Au are sequentially and uniformly deposited on each heating resistor 16, and
A pair of current-carrying electrodes 17 formed by a seven-layer etching method are connected thereto. A switching element 18 that opens and closes in response to an image control signal is connected between each of the current-carrying electrodes 17. In addition, the symbol @19 is an insulating layer such as 5i02 with a thickness of about 2 μm formed by high-frequency sputtering to insulate the heating resistor 16 and each current-carrying electrode 17, and 20 is a power source for powering each heating resistor 16. It is.

Further, the electrostatic field forming means 6, as shown in FIG.
On the insulating layer 19, about 500 angstroms of Cr and C
u about 10000 angstroms and cr about 500 angstroms
A head-side electrode 21 formed by sequentially vapor-depositing angstroms, a roll-shaped electrostatic induction power source 22 that is appropriately spaced apart from the three ink surfaces and also functions as a support surface for the recording sheet 5, and a head-side electrode 21 and Electrostatic induction electrode 2
An electrostatic induction power supply 23 is interposed between the two and forms an electrostatic field from the ink 3 surface toward between the electrostatic induction electrodes 22. Note that the head side electrode 21 is grounded.

The ink 3 accommodated in the slit-like space 1 is a conductive oil-based pigment-dispersed ink that exhibits a viscosity of 100 cps at room temperature (20°C) and whose viscosity decreases to 5 cps when heated (100°C). It is used.

Next, a method for manufacturing an inkjet recording apparatus according to this embodiment will be explained. That is, in this embodiment, the upper substrate 7 for forming the slit-like space 1 is separated into an upper substrate main body 12 and a plate-like member 13. In order to manufacture the above-mentioned plate-like member 13, first 5
8 + on one side of a 00 μm thick alumina ceramic plate
A protective film such as 02 or SiN is formed. This protection 5! The membrane is
For example, a 5i02 layer or the like is formed by applying a low melting point glass paste to one side of an alumina ceramic plate and then firing it at a predetermined temperature. Next, as shown in FIG. 4, the alumina ceramic plate 25 is cut into a predetermined rectangular shape using a No. 200 diamond cutter 26 or the like, and the end face of the cut alumina ceramic plate 25 is coated with a diamond slurry having a particle size of 1 μm. Polish the corners to make them flat.

On the other hand, the upper substrate main body 12 is formed into a predetermined shape having a recess 11 as shown in FIG. 3 by die-casting or cutting a metal material, or by injection molding a plastic material.

Then, as shown in FIG. 5, the plate-like member 13 is placed on the upper substrate body so that the protective film 8102 is on the non-adhesive side.
The upper substrate body 12 is placed on the end surface side of the upper substrate body 12 and brought together so that the polished lower end surface of the plate-like member 13 and the lower surface of the upper substrate body 12 are aligned with each other.

Next, as shown in FIG. 6, the plate member 13 is molded onto the upper substrate body 12 using a two-component poxy adhesive 27 such as EH-455 (trade name, manufactured by Mitsui Toatsu). to create the upper substrate 7. As shown in FIG. 7, this upper substrate 7 is bonded so as to face the lower substrate 8 via a 50 μm thick polyimide spacer 15.
Head body 2 was created. The above upper substrate 7 and lower substrate 8
The deviation of the tip of is suppressed to 10 μm or less. still,
The lower substrate 8 is manufactured by a conventional method.

In the above configuration, the inkjet recording apparatus according to this embodiment performs image recording in the following manner. That is, the ink 3 is supplied from the supply port 14 to the slit-shaped space 1 formed between the upper substrate 7 and the lower substrate 8, and an ink meniscus is formed at a negative pressure of 1 to 20 mH2O than the outflow pressure.

Next, a driving pulse corresponding to the image information to be recorded is applied to the heating resistors 16, 16, . . . of the energy applying means 4 by 0.2
When a heating pulse of 5 W and 2 m5 ec is applied, the heating resistors 16, 16, . . . generate heat, and the corresponding ink intermediate region receives natural energy and is heated. Then, in this heated ink unit region, the viscosity and surface tension of the ink 3 are reduced, and the electrical conductivity is improved. On the other hand, the driving timing of the thermal energy applying means 4 is synchronized so that the falling edge thereof coincides with the driving timing of the thermal energy applying means 4, and 2.0 Kv, 0.
When an electrostatic control pulse of 4m5eC is applied to the electrostatic induction electrode 22 of the electrostatic field forming means, an electrostatic field is formed between the ink surface and the electrostatic induction electrode 22, and heating is performed based on this electrostatic field. The resulting ink unit area flies toward the recording sheet 5 passing in front of the electrostatic induction electrode 22, and ink dots are formed on the recording sheet 5.

Note that the electrostatic induction electrode 22 has a diameter of 20 mm, for example.
A metal roll 22 is used, and the recording sheet 5 is brought into close contact with the surface of this roll 22. Then, the electrostatic induction electrode 22
The distance between the head body 2 and the head body 2 is set to, for example, Q, 3 mm.

When the present inventors actually performed printing under the above conditions, the density unevenness in the slit direction of the image was less than that of conventional printing. However, when plain paper was used as the recording sheet 5, the shape and size of each dot varied to some extent because the plain paper had rough fibers.

Next, when printing was carried out using a thin film coated with silica as the recording sheet 5, approximately circular recording dots could be obtained. When we measured the size of 100 dots at this time and investigated the variation, it was 106 ± 19 μm in the conventional device, but it was 105 ± 10 μm in this experimental example,
It was found that the variation in recorded dots was significantly reduced compared to the conventional method.

As described above, in the inkjet recording apparatus according to this embodiment, the recess 11 is formed in the upper substrate 7 constituting the head main body 2, and the ink ejection is controlled by the gap size on the ink ejection part 10 side in the slit-shaped space 1. Since the gap size of the ink storage part 9 communicating with the ink storage part 9 is set large, the proportion of the ink 3 in the ink storage part 9 that comes into contact with the inner wall surface decreases, and the ratio of the ink 3 that comes into contact with the inner wall surface of the ink storage part 9 decreases. It becomes possible to reduce the flow resistance that acts.

Therefore, the transportability of the ink 3 in the slit-shaped space 1 is improved, and the supply of the ink 3 from the ink storage section 9 to the ink discharge section 10 is stabilized, so that the printing operation has the advantage of being able to speed up the recording operation. There is.

Further, in the inkjet recording apparatus according to this embodiment, the upper substrate 7 is divided into an upper substrate main body 12 for forming the ink storage section 9 and a plate-like member 13 for forming the ink discharge section 10. Therefore, the ink discharge section 10
Thickness dimension! is determined by the thickness of the plate-like member 13, and by using the plate-like member 13 with a constant thickness,
The thickness dimension 18 of the ink discharge portion 10 can be formed with high precision. Therefore, the suspension of the ink 3 ejected from the ink ejection section 10 is constant, and the size of the recording dot can be made constant, and the ink 3 is uniformly supplied to each ink unit area, so the recording speed can be reduced. It can be made uniform.

Further, in the method for manufacturing an inkjet recording device according to the present invention, the plate-like member 13 for forming the ink ejection section 10 and the upper substrate main body 12 for forming the ink storage section 9 are separately produced. , since the plate member 13 is fixed to the substrate body 12 to constitute the upper substrate 7,
Manufacturing can be performed easily, and the thickness dimension 18 of the ink ejection section 10 can be formed with high accuracy.

Second Embodiment FIGS. 8 and 9 show a second embodiment of the inkjet recording apparatus according to the present invention, and the same parts as in the first embodiment are designated by the same reference numerals. To explain, in this embodiment, the shape of the upper substrate body is different from the previous embodiment. That is, the upper substrate main body 12 has a 10th
As shown in the figures and FIG. 11, a recess 11 for forming the ink storage section 9 is provided, whereas in the embodiment described above, this recess 11 was opened toward the ink discharge section. In this embodiment, the side surface on the ink ejection section side is opened. Side wall 1 of the upper main body substrate 12 on the side of the ink discharge section
2a is formed as thin as, for example, about 250 μm,
This side wall 12a is for preventing the glass plate from being bent and deformed when a flexible glass plate or the like is used for the plate member 13 formed as a separate member from the main body substrate 12. Since the other configurations and functions are the same as those of the first embodiment, their explanations will be omitted.

By the way, the inkjet recording apparatus according to the second embodiment is manufactured as follows. That is, in this embodiment, in order to manufacture the plate member 13, first
As shown in FIG. 4, a large number of thin glass plates 30 with a thickness of ~1 mm, for example, a glass plate 30 with a thickness of 250 μm, are cut into predetermined rectangular shapes using a No. 200 diamond cutter 26 or the like. Next, as shown in FIG. 12, for example, 20 of the cut glass plates 30 are stacked one on top of the other, and their end faces are polished to a mirror finish with a diamond slurry having a particle size of 1 μm. In this way, when thin glass sheets are used as the plate member 13, the reason why a plurality of sheets of glass are stacked and polished is that when polishing the glass, as shown in FIG. 13, the corner of the polished surface is Since chipping 31 called chipping is likely to occur on the parts, multiple glass plates 30 are stacked and polished to remove chipping 31.
This is because the remaining glass plates 30 are used except those on both sides where 1 occurs.

On the other hand, the upper in-board main body 12 is made by die-casting or cutting a metal material, or by injection molding a plastic material, as shown in FIG. 10 and FIG. It is formed into a predetermined shape having a recess 11 that is closed on the side of the ink ejection section 10 by a side wall 12a.

Then, as shown in FIG. 14, the plate member 13 is arranged on the end surface side of the upper substrate body 12, so that the polished lower end surface of the plate member 13 and the lower surface of the side wall 12a of the upper substrate body are aligned. to meet. Next, after temporarily fixing the plate member 13 to the side wall 12a of the upper substrate main body with a cyanoacrylate adhesive (not shown), the outer periphery of the plate member 13 is fixed to the side wall 12a of the upper substrate body, and then the outer periphery of the plate member 13 is attached to the side wall 12a of the upper substrate main body. A two-component poxy adhesive 27 (manufactured by Toatsu Co., Ltd.) or the like is used to bond the upper substrate 7 in a molding manner. In the lower substrate 7 created in this way, the thickness dimension 18 of the ink ejection portion 10 is as follows.
The side wall 12a of the substrate main body is attached to the thickness of the strip member 13 of 250 μm.
However, the portion of the plate member 13 having a thickness of 250 μm is the only portion that is actually heated by the thermal energy applying means 4 or the like and contributes to ink ejection. After that, the upper substrate 7 has 50
The head body 2 is produced by adhering to the lower substrate 8 so as to face it via a μm thick polyimide spacer 15.

Note that the lower substrate 8 is manufactured by a method similar to the conventional method.

With the above configuration, printing was performed using the inkjet recording apparatus according to the second example under the same conditions as in the first example. As a result, as in the first embodiment, the S degree unevenness in the slit direction of the image was smaller than in the conventional case. However, when plain paper was used as the recording sheet 5, the shape and size of each dot varied to some extent because the plain paper had rough fibers.

Next, when printing was carried out using a thin film coated with silica as the recording sheet 5, approximately circular recording dots could be obtained. When we measured the size of 100 dots at this time and investigated the variation, it was 106 ± 19 μm in the conventional device, but it was 110 ± 8 μm in this experimental example, and the diameter of the recording dot was Although slightly larger than the first example,
The variation was smaller than that in the first example.

[Effects of the Invention] As explained above, according to the inkjet recording device and the manufacturing method thereof according to the present invention, it is possible not only to speed up the recording operation but also to reduce the slit-like space by using the pair of substrates. In forming the insulating member, the length of the gap between the ink discharge portions can be formed with high accuracy, and furthermore, the insulating member can be easily processed without causing any defects.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing a first embodiment of the inkjet recording apparatus of the present invention, FIG. 2 is a sectional view thereof, FIG. 3 is an exploded perspective view showing the upper substrate, and FIG. 4 is manufacturing of a plate-like member. FIG. 5 is a perspective view showing the upper substrate, FIG. 6 is a sectional view of the main part showing the bonding part, FIG. 7 is an exploded perspective view of the head body, and FIG. 8 is the second embodiment of the present invention. A schematic perspective view showing the embodiment, FIG. 9 - is a cross-sectional view, FIG. 10 is a perspective view showing the upper substrate main body, and FIG. 11 is a vertical cross-sectional view showing the upper substrate main body.
Fig. 12 is a perspective view showing the polishing state of the plate-like member, Fig. 13 is an explanatory view showing chipping caused by polishing the plate-like member, Fig. 14 is an exploded perspective view showing the upper substrate, and Fig. 15 is the adhesive part. FIGS. 16 and 17 are schematic perspective views and sectional views showing a conventional inkjet recording apparatus, and FIGS.
8 and 19 are schematic perspective views and sectional views showing other conventional inkjet recording devices, FIGS. 20 to 22 are perspective views showing a method for manufacturing the upper substrate, respectively, and FIG. 23 is a method for polishing an insulating substrate. It is an explanatory diagram showing a state. [Explanation of symbols] 1... Slit-shaped space 2... Head main body 3... Ink 4... Thermal energy application means 7... Upper substrate 8... Lower substrate 9... Ink storage Part 10... Ink ejection part 11... Recess 12... Upper substrate main body 13... Plate member patent applicant Fuji Xerox Co., Ltd. Representative Patent attorney Tomohiro Nakamura (3 others) New Figure 3 / Figure 5 Figure 6 Figure 7 Figure 1 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 12a 11 Figure 16 Figure 17 Figure 18 Figure 19 Ram Figure 20 Figure 21 Figure 22 Figure 23 Figure B

Claims (2)

[Claims] (1) A pair of substrates are disposed facing each other along the longitudinal direction, and the ink storage section stores ink between the two substrates, and the ink discharge section opens at one end in the width direction of the substrate and discharges ink. A head body formed of a slit-like space, and a head body for selectively ejecting each ink unit area from an ink ejection section to the recording sheet side in accordance with image information for each ink unit area according to pixel density. an inkjet recording device comprising an energy applying means for applying energy, and a gap dimension of an ink storage section communicating with the ink discharge section is set larger than a gap dimension on the ink discharge section side in the slit-shaped space, An inkjet recording apparatus characterized in that one of the substrates is divided into a substrate main body for forming an ink storage section and a plate-like member for forming an ink discharge section. (2) A pair of substrates are arranged to face each other along the longitudinal direction, and consist of an ink storage section that accommodates ink between the two substrates, and an ink discharge section that opens at one end in the width direction of the substrate and discharges ink. A head body formed of a slit-like space, and a head body for selectively ejecting each ink unit area from an ink ejection section to the recording sheet side in accordance with image information for each ink unit area according to pixel density. and an energy applying means for applying energy, and the gap size of the ink storage section communicating with the ink discharge section is set to be larger than the gap size of the ink discharge section side in the slit-shaped space. It is a method,
After cutting a plate material of a predetermined thickness into a predetermined shape, the end face of the substrate is polished to create a plate-like member for forming the ink ejection section, and a step for forming the ink storage section. A method for manufacturing an inkjet recording device, comprising the steps of creating a substrate body and creating one of the pair of substrates by fixing the plate-like member to the substrate body.