CN1309568C - Ink jet recording apparatus - Google Patents
Ink jet recording apparatus Download PDFInfo
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- CN1309568C CN1309568C CNB2004100117276A CN200410011727A CN1309568C CN 1309568 C CN1309568 C CN 1309568C CN B2004100117276 A CNB2004100117276 A CN B2004100117276A CN 200410011727 A CN200410011727 A CN 200410011727A CN 1309568 C CN1309568 C CN 1309568C
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1607—Production of print heads with piezoelectric elements
- B41J2/1609—Production of print heads with piezoelectric elements of finger type, chamber walls consisting integrally of piezoelectric material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
- B41J2/03—Ink jet characterised by the jet generation process generating a continuous ink jet by pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/162—Manufacturing of the nozzle plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/1626—Manufacturing processes etching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/1632—Manufacturing processes machining
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
An ink jet recording apparatus is provided that can perform stable ink ejection without a position shift occurring between a nozzle in a nozzle plate and a flow path in a body. A nozzle head (6) includes a body (30), for which a vibration unit (29) for vibrating ink is provided, and a nozzle plate (31), which is a single metal member that is detachable from the body (31, fig 1). In the nozzle plate, a nozzle (40) is formed by coupling a cylindrical hole, which is an ink ejection end a tapered hole and a curved hole, and an ink flow path, which is connected to the nozzle, is formed by coupling two or more cylindrical holes (37,38,39) for which the inner diameters differ.
Description
Technical field
The present invention relates to carry out the ink-jet recording apparatus of lettering from nozzle ejection ink.
Background technology
About the nozzle of ink-jet recording apparatus, on the booksly open nozzle in the flat 10-226070 communique the spy.This is the situation that forms a plurality of nozzles on a slice metallic plate by punch process.Nozzle is to have connected the cylindrical hole part, and the curved hole part of annular and the structure of conical bore part are from the direction ejection ink of conical bore part one lateral cylindrical bore portion one side.And nozzle plate is fixed on other member with stream.
In ink-jet recording apparatus, importantly along spraying ink as the crow flies with respect to the rectangular direction of nozzle plate.For this reason, need critically process assembling to nozzle plate and stream, make and in the flow process of ink, can not disturb.In above-mentioned conventional art, need by bonding or bolting have the ejection ink nozzle nozzle plate and supply with the main body of the stream of ink to nozzle.But in such method, have at nozzle plate when main body is loaded and unloaded, because nozzle and the displacement of stream or overflowing of bonding agent, produce in the flow process of step that in the bonding part of the stream of nozzle and main body, produces and disturb at ink, the ink particle bending of ejection can not be guaranteed the problem of the stability that particle forms.
In the flat 5-293960 communique of Japanese Patent Application Laid-Open, disclose and utilized etching that injection nozzle is carried out multistage perforate processing, though multistage conical bore can be set, but it is different with the present invention, do not make any record to cylindrical hole part this point being set and curved hole part this point is set at nozzle segment and opposition side, therefore its formation is different with hole of the present invention formation, and processing method is also different fully.
Be willing in the flat 4-257449 communique that in Japanese patent application laid disclosed is to engage two plates and form structure of nozzle, is to utilize etching and processing to form parallel portion, tapered segment, parallel portion continuously to each plate, and the structure that they are bonding.Therefore, with combined drill of the present invention and punch and to form the structure of nozzle and stream different, require the quite high machining accuracy and the structure of bonding precision in order to overlap two plates.
Summary of the invention
Therefore, the object of the present invention is to provide the displacement that can not produce nozzle and stream, do not have the ink discharge device that can carry out the stable ink ejection of ink bending.
In order to achieve the above object, the ink-jet recording apparatus that carries out lettering from nozzle ejection ink of the present invention possesses: have ink is applied the shake main body of unit of adding of vibration; And can load and unload on the aforementioned body and constitute by single hardware, form the nozzle plate of nozzle, it is characterized in that: the said nozzle plate has nozzle, and this nozzle is provided with: by the cylindrical hole part that becomes ink ejection end, the conical bore part that partly is connected and reduces with above-mentioned cylindrical hole along ink emission direction aperture, the curved hole part that partly is connected and reduces with above-mentioned conical bore along ink emission direction aperture, and the ink flow path that is connected in above-mentioned curved hole part and partly constitutes along the different cylindrical hole of the internal diameter more than 2 or 2 that the direction internal diameter of above-mentioned curved hole part reduces.
If according to the present invention, then supply with the stream of ink, so can not cause the displacement of nozzle and stream owing to the nozzle that on a slice nozzle plate, constitutes the injection ink with to nozzle.Thereby,, can not have the stable ink ejection of ink bending even adopt the bolting that can easily load and unload nozzle plate yet.In addition, owing to easily carry out the loading and unloading of nozzle, under the situation that ink stops up even therefore foreign matter or ink solidifies are arranged in ink, also can unload nozzle plate and promptly remove foreign matter by ultrasonic wave cleaning etc.
Description of drawings
Fig. 1 is the profile of the shower nozzle of one embodiment of the invention.
Fig. 2 is the profile of the nozzle plate of one embodiment of the invention.
Fig. 3 is the front elevation of the nozzle plate of one embodiment of the invention.
Fig. 4 is the profile of the nozzle of one embodiment of the invention.
Fig. 5 is the overview of punch of having made the nozzle of one embodiment of the invention.
Fig. 6 is the overview of the ink-jet recording apparatus of one embodiment of the invention.
Fig. 7 illustrates the body interior of the ink-jet recording apparatus of one embodiment of the invention.
Fig. 8 is the ink circulation figure of the ink-jet recording apparatus of one embodiment of the invention.
Fig. 9 is the processing technology figure of nozzle plate.
Figure 10 is the profile of the nozzle plate of another embodiment of the present invention.
Figure 11 is the enlarged drawing of the coupling part of the main body of having cut apart nozzle of the present invention.
Figure 12 is the amplification profile of top one side main body.
Figure 13 is used to ask the direction of principal axis of another embodiment and the key diagram of fluid resonant frequency.
Figure 14 is the enlarged drawing of the piezoelectric element section partly of another embodiment.
The specific embodiment
Below, the 1st embodiment of the present invention is described with reference to the accompanying drawings.
Fig. 6 is the overview of ink-jet recording apparatus of the present invention.This ink-jet recording apparatus constitutes possesses the main body 600 of having accommodated the control system or the circulatory system, the print head 610 with the nozzle that sprays ink and generate particle and connection main body 600 and the circulatory system of print head 610 and the cable 620 of control system.In main body 600, have the user and can carry out the liquid crystal display 630 that the touch-screen type of demonstrations such as content or device operational situation was imported and controlled to lettering content or lettering standard etc.The lid of the columniform stainless steel of print head 610 usefulness covers, and the lettering unit that generates the ink particle and control the flight of ink particle is taken in by portion within it.Being arranged on the hole of covering on the bottom surface 615 is used for by the ink particle.
Secondly, use Fig. 7 that the internal structure of main body 600 is described.At the top of main body 600 configuration control substrate 640 parts such as electric system such as grade.In lower body part 680, circulatory system control assembly such as configuration magnetic valve 650 and pump unit 655 is also accommodated and has been stored ink tank 1 from ink to nozzle that supply with.Door 670 can open and close, and can go out ink tank at door 670 1 laybacks, easily carries out the supply of ink, discarded etc. maintenance.
Secondly, use Fig. 8 that the ink circulation system of ink-jet recording apparatus and the schematic configuration of lettering unit are described.Providing ink path 21 by the supply pump 2 of the ink tank 1 of ink reservoir in advance, force feed ink, regulate ink pressure control valve 3, show that the pressure gauge 4 and the filter 5 of the pressure of supplying with ink constitute.Pressure feed ink to be scheduled on ink gun 6.On charged electrode 7, connecting the tracer signal source,, making the ink particle 8 that ejects regularly from ink gun 6 charged by on charged electrode 7, applying tracer signal voltage.In top deflecting electrode 9, connect high voltage source, bottom deflecting electrode 10 ground connection.Thus, between top deflecting electrode 9 and bottom deflecting electrode 10, form static electric field, by charged electrode 7 charged ink particle 8 according to its carried charge deflection flight, attached to carrying out lettering on the record body.Ink recovery path 22 is by groove 11, filter 12 and reclaim pump 14 and constitute, reclaim not by charged electrode 7 charged not have the ink particle 8 contributed for record, turn back to and utilize this ink in the ink tank 1 once more.
Secondly, use Fig. 1 that ink gun 6 is described.Ink gun 6 constitutes by adding the unit 29 that shakes, main body 30 and nozzle plate 31.The material of main body 30 and nozzle plate 31 is SUS304.Nozzle plate 31 usefulness bolts 28 are fixed on the main body 30.Form ink chamber between main body 30 and nozzle plate 31, the providing ink path 21 from a side in ink chamber imports ink.O shape ring 26 is set between main body 30 and nozzle plate 31, prevents ink leakage from ink chamber 36.Import to internal diameter and length different 3 cylindrical hole part (streams) 37,38,39 of ink in the ink chamber 36, from nozzle bore 40 ejections by being arranged on nozzle plate 31 inside.Add the unit 29 that shakes and constitute, make piezoelectric element 32 vibrations with predetermined period, make the ink vibration through vibrating reed 35 by oscillation source 27 by piezoelectric element 32 and the vibrating reed 35 that is arranged on the main body 30.
Secondly, use the profile of Fig. 2 and the front elevation of Fig. 3, the details of nozzle plate 31 is described.The outer shape of nozzle plate 31 is shapes of 3 band ladders, and the 1st ladder the 50, the 2nd ladder 51 is cylindrical, and the 3rd ladder 52 is rectangle as shown in Figure 3.4 angles in the 3rd ladder 52 are provided with bolt hole 25.Inside at nozzle plate 31, from a side of ink chamber 36 the mutually different cylindrical hole part 37 of internal diameter (internal diameter 2mm), cylindrical hole part 38 (internal diameter 1mm), cylindrical hole part 39 (internal diameter 0.5mm) are set in proper order, nozzle bore 40 (internal diameter 0.065mm) is set on the top.Because cylindrical hole part 37, cylindrical hole part 38 and cylindrical hole part 39 usefulness drill bit perforates processing, so cylindrical hole part 37 and cylindrical hole part 38, the seam 33,34 of cylindrical hole part 38 and cylindrical hole part 39 becomes the taper shape of 120 ° of drill end angles.Cylindrical hole part 37, cylindrical hole part 38, cylindrical hole part 39 become the structure of the mutually different band ladder of internal diameter supplying with in the ink via of ink to nozzle bore 40.This is not occur in the fluid resonance that produces in the ink flow path in order to make.The fluid resonant frequency of ink flow path is obtained with following formula (1).
f
r＝nV
i/{4(l+k
2)} (1)
Here, n is that Vi is the velocity of sound in the ink by the integer value of resonance mode decision, and l is the length of ink flow path, and k is a correction factor.Because with respect to the aperture of cylindrical hole part 39, the aperture of nozzle bore 40 is fully little, therefore obtaining an end closes the boundary condition that an end is opened, and becomes under pattern under n=1, the quadratic modes n=5 under the n=3 and tertiary mode.In addition, because cylindrical hole part 37,38 becomes the boundary condition that open at two ends, therefore become under pattern under n=2, the quadratic modes n=6 under the n=4 and tertiary mode.In addition, though the velocity of sound in the ink generally is 1200～1400m/s at normal temperatures, change according to the velocity of sound in the temperature ink.Operating temperature range at ink-jet recording apparatus is in 0～45 ℃, and about ± 10% variation takes place the velocity of sound in the ink.Therefore, in the present embodiment,, adjust flow path length l, make the fluid resonant frequency fully leave driving frequency 70kHz for particle forms the influence that is not subjected to fluid resonance.In the present embodiment, in each ink flow path, the pattern that fluid resonant frequency is minimum is set for more than or equal to 90kHz.In the present embodiment, the length of the ink emission direction of cylindrical hole part 37, cylindrical hole part 38 and cylindrical hole part 39 is made 2～3mm, the length L of nozzle plate 31 is made 7mm.Do like this by above,, use the vibration that has utilized for the few mechanical resonance of variations in temperature to amplify, can carry out stable particle and form owing to the influence that can not be subjected to for the big fluid resonance of variations in temperature.
Fig. 9 is the processing technology figure of nozzle plate 31.At first, in step 11, process profile.Then, in step 12 to 14, according to the internal diameter size sequence, with drill bit processing column bore portion 37,38,39.In step 15, come working nozzle 40 by punch process.At last, in step 16,, form the high and nozzle 40 that do not have scar or foreign matter to adhere at inner surface of vacuum by grinding or erosion removal remains in SUS parts or burr in the nozzle plate 40.
Secondly, use Fig. 4 that the details of nozzle 40 is described.Nozzle 40 is by having the cylindrical hole part 42 that ink sprays the opening portion (flow export) 41 of a side, the conical bore part 43 that reduces along ink emission direction aperture and constituting with the curved hole part 44 that horn shape reduces along ink emission direction aperture.Insert punch 60 shown in Figure 5 from cylindrical hole part 39 1 sides, form nozzle 40 by punch process.The axle 64 of punch 60 is because by cylindrical hole part 39, so diameter is 0.4mm, and is very thin and be easy to fracture.Therefore, the axle 64 of punch 60 is as entering into the part of cylindrical hole part 39, and the part that enters into cylindrical hole 37,38 to make axle 65 overstrikings of punch 60 be 0.9mm to diameter.Thus, can prolong the life-span of punch.The head portion 62 of punch 60 is diameter 0.065mm, and length 0.06mm's is cylindrical, and the angle θ of conical bore part 61 is 40 °.The SUS residual materials in stopped nozzles hole 40 or burr are by the surface grinding or the erosion removal of opening portion 41 1 sides.The shape of the shape copying punch 60 of cylindrical hole part 42 and conical bore part 43.
The aperture of cylindrical hole part 42 is 0.065mm, and the length of ink injection direction is 0.05mm.Conical bore part 43 becomes the edge of a knife of curvature smaller or equal to 0.001mm with the seam 46 of cylindrical hole part 42.The conical bore angle ψ of conical bore part 43 is 40 ± 5 °, and the aperture in the seam of conical bore part 43 and curved hole part 44 is about 0.17mm.In addition, the length of the ink injection direction of conical bore part 43 is about 0.14mm.Secondly, curved hole part 44 more gently tilts with the coning angle ψ than conical bore part 43, increases gradually towards cylindrical hole part 39 internal diameters, is connected on the cylindrical hole part 39.Curved hole part 44 when being pressed into punch 60 by pulling and plastic deformation, the thickness of slab adjustment when its shape or curvature can be according to material hardness or punching presses.
Secondly, the nozzle 6 that uses Figure 10 explanation to constitute by another embodiment of the present invention.Figure 10 is the profile of the nozzle 6 of another embodiment.With the maximum different piece of the embodiment of front be to constitute along a direction to make the ink flow path of supplying with ink, therefore add the unit that shakes and directly add and shake to ink flow path.In addition, replace nozzle plate 31, be constructed such that main body 30 is divided into 2.That is, nozzle plate 6 is made of main body 30, the piezoelectric element 32 that is configured in its outer peripheral portion and protective cover 72 and the joint 21a that is configured in main body 30 1 ends.In addition, main body 30 can be divided into main body 30a, 30b.Joint 21a bonds on the main body 30 with bonding agent.In addition, protective cover 72 usefulness bolt 28a are fixed on the main body 30.The hole 73 that is arranged on the protective cover 72 is the outlets that are used for supplying with to piezoelectric element 32 lead-in wire of signal.
Supply with inks from joint 21a to main body 30, the ink flow path 37,38,39 that reduces gradually by diameter in 3 ladders of main body 30 inside is from flow export (top end opening part) 41 ejections of front.The material of main body 31 is stainless steels, and the ink flow path that diameter reduces gradually between 3 stages is by the drill bit processing and fabricating.The flow export 41 of its front is made by punch process.In addition, the reason that is arranged on the stream 37,38,39 that 3 stage diameters reduce is narrated in the back.
Here use Figure 12 that the preparation method of flow export 31 is described.
Basically the identical making of situation of the embodiment that narrated with the front.But, under the situation of present embodiment, owing in divided main body, can process the main part of top one side, therefore as the embodiment of front, after the band ladder stream of 3 ladders that formed nozzle plate, can shorten instrument with comparing by the situation of being opened opening portion (flow export) 41 by punch, handling ease can also improve machining accuracy.That is, use the drill bit processing and fabricating after the columniform ink flow path 39, forming tapered segment 80,82.This cone angle is identical with the drill end angle, is about 120 °.Then, use to become the punch identical shaped with the flow export head portion, by carrying out punch process, forming does not have tapered segment 80, along the tapered segment 81 of stamping machine end shape and the flow export 41 about diameter 65 μ m.
Secondly, use Figure 14 to explain piezoelectric element 32.Piezoelectric element 32 is cylindrical, on interior outside electrode is set.The inner face electrode 55 of piezoelectric element 32 be arranged on that whole of inner face of column part goes up and end face on.In addition, externally between electrode 56 and the inner face electrode 55 in order to keep electric insulation, electrodeless part 54 is arranged on the outside of piezoelectric element 32.The part of the inner face electrode 55 of piezoelectric element 32 and main body 30 bonding joints make it possible to transmit effectively to main body 30 vibration of piezoelectric element 32.The inner face electrode 55 of piezoelectric element 32 is because therefore contact main body 30 can guarantee main body 30 and 55 conductings of inner face electrode reliably.Thus, by external electrode 56 is connected with the emitter that the sinusoidal wave signal of telecommunication takes place on main body 30, can add piezoelectric element 32 and shake.
Figure 13 is the details drawing of main body 30. Main body 30a and 30b are that the length that both lump together is the cylindrical form of L0, form the ink flow path 38,39 of length L 2, L3 in inside.
Here, illustrate applying on the piezoelectric element 32 under the situation that high frequency voltage makes main body 30 (conjugant of main body 30a and main body 30b) vibration that its vibration is delivered to the situation of the ink that flows through in the main body.Under the vibration in the voltage range that can join piezoelectric element 32, be to be used to carry out the very little inadequate amount that particle forms.Thereby, constitute and amplify vibration with main body 30 and make the axial resonant frequency f of main body 30
b(mechanical resonance) becomes nozzle driving frequency f
nNear.Axial resonant frequency f
bCan obtain with following formula.
f
b＝nV
b/{4(L+k
1)}
Here, n is that L is the length of main body 30, V according to the integer value of resonance mode decision
bBe the velocity of sound in the main body 30, k
1Be that correction factor is according to the experiment decision.In the present embodiment, material is a stainless steel, V
b=5000m/s.The driving frequency f of nozzle
nRoughly determine its optimum value, f in the present embodiment according to flow export diameter (aperture in the present embodiment is ψ 0.065mm)
n=70kHz.The 1st subresonance frequency f in the calculating
b(n=1) become f
nThe length of L be about 22mm, and in fact since the 1st subresonance frequency according to the alteration of form of joint, therefore the length of suitable L is the scope of about 22～26mm.Thus,, make the ink vibration, therefore can carry out effective particle and form because the vibration of piezoelectric element 32 is amplified with main body 30.
Secondly, the ink flow path of main body 30 is described.The flow export 41 (aperture ψ 0.065mm) that is used to spray ink in the end processing of main body 30.
f
r＝nV
i/{4(l+k
2)}
Because the aperture of flow export is fully little with respect to the aperture of ink flow path 39, therefore obtaining an end closes the boundary condition that an end is opened, become under pattern n=1, n=3 under the quadratic modes and under tertiary mode n=5.In addition, ink flow path 37,38 is owing to become the boundary condition that open at two ends, therefore become under pattern n=2, n=4 under the quadratic modes and under tertiary mode n=6.In addition, velocity of sound is 1200～1400m/s at normal temperature in the general ink, but the velocity of sound in the ink changes according to temperature.Its variable quantity in 0～45 ℃ of the operating temperature range of ink-jet recording apparatus is ± about 10%.Thereby, in the present embodiment,, set flow path length l and make fluid resonant frequency become fully high frequency from driving frequency in order to make particle form the influence that is not subjected to fluid resonance.Specifically, the path of stream is divided into 3 more than the ladder, sets for and make each flow path length l 1/2 short than flow path length L.This flow path length l becomes L1, L2, the L3 among Figure 13.By such setting, the fluid resonant frequency that can make the ink that flows through each stream is than driving frequency height.Here, make the length of ink flow path 39 shorter, make and compare that fluid resonant frequency raises with other ink flow path 37,38 than the length of ink flow path 37,38.This is to exert an influence because near the fluid resonance characteristics of the ink flow path 39 of flow export 31 particle is formed.
Do like that by above,, can obtain having utilized vibration to amplify, therefore can carry out stable particle and form for the few mechanical resonance of variations in temperature owing to the influence that is not subjected to for the big fluid resonance of variations in temperature.
Yet, if use the such nozzle of Figure 10 to carry out lettering, because the volatility height of the solvent in the ink, therefore choked flow outlet sometimes 41.In addition, do not have the fine particle of removing in the filter in the ink circulation path sometimes and block.Under such situation, nozzle plate is unloaded from ink-jet recording apparatus, be immersed in the method for using ultrasonic wave to clean in the solvent and clean.Under the long situation of the length of nozzle, cleaning the nozzle interior cleaning of carrying out by ultrasonic wave mostly needs some times.In addition, under the situation of the main body of making Figure 13 shape, the length of the punch of needed processing usefulness becomes the length that adds the length sum that is installed to the part on the stamping machine on principal length L0 when making flow export 41 on the top of stream 39 with punch process.Its length becomes about 35mm, and it is a problem that the making precision of punch self reduces.In addition, owing to have small boring part, therefore also have punch and be easy to damaged problem on the top of long punch.For this reason, as shown in figure 11, main body 30 is made the structure that can be separated into main body 30a and 30b, when can clean easily, can reach the machining accuracy that improves flow export 41 and prolong the life-span of punch process with punch.Use Figure 11 that the structure of separating part is described.
Figure 11 is the figure that has amplified the nozzle tip part of Figure 10.Main body 30a is different members with main body 30b, is screwed into male bolt and female bolt respectively, becomes the structure that engages by this bolt 50.On stream 38 border with stream 39, the rubber slab 70 that prevents member as ink leakage is installed, make to prevent the ink leakage that flows to stream 39 from stream 38.
By adopting above structure, compare with in the past embodiment, can seek the miniaturization of nozzle, and can realize that maintenance characteristics is outstanding, even also can seek the nozzle of stable ink particlized for variations in temperature.
Claims (7)
1. one kind is carried out the ink-jet recording apparatus of lettering from nozzle ejection ink, and this ink-jet recording apparatus possesses:
Have ink is applied the shake main body of unit of adding of vibration; And can load and unload on the aforementioned body and, it is characterized in that by single hardware nozzle plate that constitute, that form nozzle:
The said nozzle plate has nozzle, and this nozzle is provided with: by the cylindrical hole part that becomes ink ejection end, partly connect with above-mentioned cylindrical hole and the conical bore part that reduces along ink emission direction aperture, partly be connected with above-mentioned conical bore and the curved hole part that reduces along ink emission direction aperture and be connected in above-mentioned curved hole partly and the ink flow path that partly constitutes of the different cylindrical hole of the internal diameter more than 2 or 2 that reduces along above-mentioned curved hole direction internal diameter partly.
2. ink-jet recording apparatus according to claim 1 is characterized in that possessing: make from the charged charged electrode of the ink particle of the nozzle of said nozzle plate ejection and be used to make the deflecting electrode of the ink particle deflection after charged.
3. the manufacture method of a nozzle plate, this manufacture method is made the nozzle plate of the described ink-jet recording apparatus of claim 1, it is characterized in that comprising:
With drill bit perforate cylindrical hole step partly in the said nozzle plate to be processed into stream; And
Cylindrical hole part one side after above-mentioned perforate processing is inserted the punch that adopts the reel structure that is made of the external diameter more than 2 or 2, and punch process becomes the step of the cylindrical hole part of above-mentioned ink ejection end.
4. ink-jet recording apparatus according to claim 1 is characterized in that:
Constitute and make aforementioned body be divided into 2 structures that replace the said nozzle plate, on the main body of a side, form by the cylindrical hole part that becomes ink ejection end, partly be connected with above-mentioned cylindrical hole and the conical bore part that reduces along ink emission direction aperture, partly be connected with above-mentioned conical bore and the curved hole that reduces along ink emission direction aperture partly and the ink flow path that partly constitutes with cylindrical hole that above-mentioned conical bore partly is connected
The cylindrical hole ink flow path that reduces along with spraying a side near ink at the internal diameter that forms on the main body of opposite side more than 2 or 2 adds the unit that shakes in the outer peripheral portion configuration of the main body of the opposite side that has formed above-mentioned ink flow path.
5. ink-jet recording apparatus according to claim 4 is characterized in that:
Can cut apart at the boundary between the stream different of the ink flow path on the main body that is arranged at an above-mentioned side with the ink flow path internal diameter on the main body that is arranged at opposite side.
6. ink-jet recording apparatus according to claim 4 is characterized in that:
Constitute by bolt and engage divided aforementioned body.
7. ink-jet recording apparatus according to claim 6 is characterized in that:
Boundary in the ink flow path bonding part of above-mentioned divided main body is provided with ink leakage and prevents member.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003331578 | 2003-09-24 | ||
| JP2003331578A JP4246583B2 (en) | 2003-09-24 | 2003-09-24 | Inkjet recording device |
| JP331578/2003 | 2003-09-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1600546A CN1600546A (en) | 2005-03-30 |
| CN1309568C true CN1309568C (en) | 2007-04-11 |
Family
ID=33411171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100117276A Expired - Lifetime CN1309568C (en) | 2003-09-24 | 2004-09-24 | Ink jet recording apparatus |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4246583B2 (en) |
| CN (1) | CN1309568C (en) |
| GB (1) | GB2406307B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4844119B2 (en) * | 2005-12-26 | 2011-12-28 | 株式会社日立製作所 | Droplet forming apparatus and ink jet recording apparatus using the same |
| JP4881126B2 (en) | 2006-10-25 | 2012-02-22 | 株式会社東芝 | Nozzle plate manufacturing method and droplet discharge head manufacturing method |
| JP4936880B2 (en) | 2006-12-26 | 2012-05-23 | 株式会社東芝 | Nozzle plate, nozzle plate manufacturing method, droplet discharge head, and droplet discharge apparatus |
| JP5213650B2 (en) * | 2007-11-12 | 2013-06-19 | 京セラ株式会社 | Ink jet head structure and ink jet recording apparatus |
| CN101497265B (en) * | 2008-01-28 | 2011-08-31 | 株式会社日立产机系统 | Inkjet recording apparatus |
| JP2011051274A (en) * | 2009-09-03 | 2011-03-17 | Seiko Epson Corp | Liquid ejecting head and method of manufacturing the same |
| JP6883876B2 (en) * | 2019-07-12 | 2021-06-09 | 株式会社ワークス | Nozzle for bonding electronic components |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04257449A (en) * | 1991-02-12 | 1992-09-11 | Fuji Electric Co Ltd | Ink jet recording head |
| JPH05293960A (en) * | 1992-04-20 | 1993-11-09 | Brother Ind Ltd | Ink jet printing head |
| JPH10226070A (en) * | 1997-02-18 | 1998-08-25 | Fujitsu Ltd | Nozzle plate, ink jet head, printer, method and system for manufacturing nozzle plate |
| JPH11240159A (en) * | 1998-02-26 | 1999-09-07 | Oki Data Corp | Manufacture of nozzle plate |
| EP1138499A2 (en) * | 2000-03-21 | 2001-10-04 | Nec Corporation | Nozzle plate structure for ink-jet printing head and method of manufacturing nozzle plate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3211851B2 (en) * | 1993-03-31 | 2001-09-25 | セイコーエプソン株式会社 | Method of manufacturing inkjet head |
| JPH0966606A (en) * | 1995-08-31 | 1997-03-11 | Seikosha Co Ltd | Manufacture of ink jet head |
-
2003
- 2003-09-24 JP JP2003331578A patent/JP4246583B2/en not_active Expired - Fee Related
-
2004
- 2004-09-23 GB GB0421235A patent/GB2406307B/en not_active Expired - Lifetime
- 2004-09-24 CN CNB2004100117276A patent/CN1309568C/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04257449A (en) * | 1991-02-12 | 1992-09-11 | Fuji Electric Co Ltd | Ink jet recording head |
| JPH05293960A (en) * | 1992-04-20 | 1993-11-09 | Brother Ind Ltd | Ink jet printing head |
| JPH10226070A (en) * | 1997-02-18 | 1998-08-25 | Fujitsu Ltd | Nozzle plate, ink jet head, printer, method and system for manufacturing nozzle plate |
| JPH11240159A (en) * | 1998-02-26 | 1999-09-07 | Oki Data Corp | Manufacture of nozzle plate |
| EP1138499A2 (en) * | 2000-03-21 | 2001-10-04 | Nec Corporation | Nozzle plate structure for ink-jet printing head and method of manufacturing nozzle plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1600546A (en) | 2005-03-30 |
| GB0421235D0 (en) | 2004-10-27 |
| JP4246583B2 (en) | 2009-04-02 |
| JP2005096188A (en) | 2005-04-14 |
| GB2406307B (en) | 2006-01-18 |
| GB2406307A (en) | 2005-03-30 |
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