Detailed description of the invention
Fig. 1 is the combining structure schematic diagram of printer head one embodiment of the present invention; Fig. 2 is the decomposition texture schematic diagram of Fig. 1; Fig. 4 is the structural representation of degassed layer in Fig. 1; Fig. 3 is another visual angle Split type structure schematic diagram of Fig. 1; Please refer to Fig. 1-4, the printer head that the present embodiment provides comprises: housing 10, the top of housing 10 is provided with the ink-feeding hole 102 of ink supply water inflow, the bottom of housing 10 is provided with at least two nozzles 101 for being sprayed by ink, piezoelectric element 3 is provided with in housing 10, enclosure interior is divided into liquid chamber and the pressure chamber 32 of upper and lower setting by piezoelectric element 3, liquid chamber is connected with ink-feeding hole 102, pressure chamber 32 is connected with nozzle 101, and piezoelectric element 3 offers the first pod apertures 33 being communicated with liquid chamber and pressure chamber 32; The printer head of the present embodiment also comprises the degassed layer 2 be arranged in liquid chamber, degassed layer 2 comprises housing parts 21 and filter 22, housing parts 21 is formed with open-topped containing groove 23, and between filter 22 and housing parts 21, forms the accommodating cavity 26 for storing bubble; And on degassed layer 2, also run through the second pod apertures 27 offered for the ink flowed into by ink-feeding hole 102 stream being drained to the first pod apertures 33.Particularly, nozzle 101 can for being opened in the through hole bottom housing 10, and the quantity of nozzle can be multiple, and can be arranged in a straight line.Piezoelectric element 3 can be horizontally set in housing 10, the internal cavities of housing 10 to be divided into the liquid chamber on top and the pressure chamber 32 of bottom, to be sprayed by the ink in the distortion driving pressure chamber 32 of piezoelectric element 3; Wherein can form multiple mutual groove in pressure chamber 32, these grooves are all connected with the first pod apertures 33 bottom, are sprayed after these grooves for ink by nozzle 101.
Further, degassed layer 2 can comprise housing parts 21 and filter 22, and housing parts 21 can be fixedly installed on above piezoelectric element 3, and its bottom surface can contact with piezoelectric element 3 end face, and the end face of housing parts 21 can be recessed to form above-mentioned containing groove 23; Filter 22 can be a flat board, filter 22 fixedly can cover the opening part (namely filter 22 is positioned at the top of containing groove 23) of this containing groove, filter 22 is made jointly to surround an accommodating cavity 26 together with the sidewall of containing groove 23 and bottom surface, now, this accommodating cavity 26 is positioned at the below of filter 22.
It should be noted that, the ultra-hydrophobicity of filter 22 refers to, bubble can be made to be passed through and be attached to deviate from side on the surface by filter one side surface, simultaneously but can block ink by filter, that is, this filter 22 can bubble in elimination ink.
Here, the filter 22 that various embodiments of the present invention are mentioned can be through the super-hydrophobic wire netting processed; Such as, the shape sheet can made for copper, rust steel, aluminium or zinc, preferably, when adopting copper mesh, can be 100 ~ 600nm for working out the diameter of the copper wire of copper mesh, the mesh on the copper mesh of formation can be then 500 ~ 900nm.Certainly, the aperture on wire netting also can be larger, and generally speaking, the aperture on wire netting can between micron order to nanoscale.
Above-mentioned wire netting can become the filter 22 with ultra-hydrophobicity after super-hydrophobic process.Be that 100 ~ 600nm, mesh then can 500 ~ 900nm copper mesh for the diameter of copper wire below, describe the detailed process of super-hydrophobic process in detail:
First copper mesh is soaked the very first time in the hydrochloric acid of 4mol/L, wherein the very first time can be 2min, to remove oxide and the impurity on surface.
Then, the copper mesh soaked soaked for the second time in the container filling ethanol solution, then in the container filling acetone soln the second time; Preferably, the second time can be 10min.Again by above-mentioned copper mesh through sonic oscillation process 5min.
Repeatedly wash down by deionized water, use strong nitrogen drying;
Finally, immerse in the ethanolic solution of the positive tetradecylic acid of 0.01mol/L by the copper mesh cleaned, at room temperature (about 25 DEG C) soaked after 3 ~ 5 days, and copper mesh surface is formed towards hydrophobic substance.Afterwards, the repeatedly drip washing of available absolute ethyl alcohol and deionized water, in natural drying.
The main chemical reactions occurred in above-mentioned processing procedure is in final step, (molecular formula is CH for copper and positive tetradecylic acid
3(CH
2)
12cOOH) react, and formation is covered with the myristic acid copper with copper mesh surface, its molecular formula is Cu [CH
3(CH
2)
12cOO]
2.
After above-mentioned super-hydrophobic process, the brass wire diameter forming copper mesh can increase to 300nm from 115nm, and the aperture of copper mesh is then reduced into 600nm; And be covered in the Cu [CH on copper wire surface
3(CH
2)
12cOO]
2be a kind of hydrophobic grouping with hydrophobic property, this hydrophobic grouping engages with the copper mesh surface with micron or nanoscale aperture, then copper mesh can be made to possess ultra-hydrophobicity, namely can catch and shift bubble.
The concrete principle that wire netting after super-hydrophobic process catches bubble is as follows, and the adhesion process of bubble can the abstract process for solid-air interface replacement solid-liquid interface.Can the size of solid, gas, liquid surface free energy determine bubble and stick on copper mesh.According to Young's equation:
γ
sv-γ
sl=γ
lvcosθ,
Wherein, γ
sv, γ
sl, γ
lvrepresent the free energy of solid and gas, solid-liquid, liquid gas interface respectively;
θ is contact angle;
For the solid of lyophily, contact angle θ <90 °, cos θ >0, Gu the free energy in-gas meter face increases, namely surface tension increases, and liquid surface shrinks, and causes the contact surface of solid and gas to connect and diminishes; For the solid of lyophoby, contact angle θ >90 °, cos θ <0, Gu the free energy in-gas meter face reduces, namely surface tension reduces, and liquid surface opens, the contact surface of solid and gas connects and becomes large, and namely bubble is more easily caught by the surface of solids.And the Cu [CH be attached on copper mesh surface in the present embodiment
3(CH
2)
12cOO]
2be above-mentioned lyophoby material, thus make bubble trend towards shifting to the surface of copper mesh and stick to copper mesh surface.
During the increased air bubble caught along with copper mesh, liquid and bubble can flow, and the contact angle of solid and gas, solid-liquid, liquid gas interface changes, and namely contact angle is now called Structure deformation angle θ
x.The pressure reduction of the inner lyophobic solid of degassed layer and lyophily solid both sides also changes.
Obtained by above-mentioned Young's equation:
Δ P is the pressure differential of lyophobic solid and lyophily solid both sides, θ
xfor the Structure deformation angle on lyophobic solid interface, for super lyophobic solid, θ
x>150 °, along with θ
xincrease gradually, then Δ P increases, then bubble transfers to lyophily solid side.
Fig. 7 A is at the photo of 0ms, 1.09ms, 2.19ms, 3.29ms, 8.21ms and 164.1ms moment bubble phase for filter position in video optics contact angle measurement photographs, as shown in Figure 7 A, filter 22 is above-mentioned copper mesh after super-hydrophobic process, as Fig. 7 A can find out, work as t=0, bubble 601 touches on the surface of filter 22, then, bubble 601 forms new form (as shown in the t=2.19ms moment in Fig. 7 A) gradually, and on filter 22, drawout forms air film 602, sticks to filter lower surface (as shown in the t=164.1ms moment in Fig. 7 A), Fig. 7 B be arrive in video optics contact angle measurement photographs, at the photo of 0s, 7.74s, 12.62s, 12.82s, 15.36s, 15.87s, 15.91s and 15.92s moment bubble phase for filter position, by in Fig. 7 B eight not photo in the same time can determine, as t=0, air film launches on filter 22, then, be filtered plate when there being bubble more in liquid to catch, air film 602 shape is thickening (as shown in the t=7.74s moment in Fig. 7 B) gradually, when air film 602 reaches certain thickness, air film transfers to opposite side from filter side, and heave gradually above filter (as shown in the t=12.82s moment in Fig. 7 B), along with the gas be captured gets more and more, air film gross distortion above filter is heaved (as shown in the t=15.36s moment in Fig. 7 B), form bubble 601, bubble 601 is broken away from the constraint of filter 22 and is departed from filter 22(completely as shown in the t=15.92s moment in Fig. 7 B subsequently).
The printer head that the present embodiment provides can be installed on ink-jet printer, in the course of the work, ink in ink-cases of printers enters by ink-feeding hole 102 liquid chamber that printer sprays interior head, and contact with the filter 22 of degassed layer 2, because filter 22 has ultra-hydrophobicity, make the bubble in ink be attracted to the surface of filter 22 and contacts ink, and transfer to the side surface that filter 22 deviates from ink, namely enter in accommodating cavity 23 that filter 22 and housing parts 21 formed; Simultaneously, because filter 22 can not allow ink to pass through, the ink being then cut bubble enters into the pressure chamber 32 below piezoelectric element 3 after the second pod apertures 27 and the first pod apertures 33, finally under the distortion of piezoelectric element 3 drives, is ejected on print media by nozzle 101.
The printer head that the present embodiment provides, by arranging the filter with ultra-hydrophobicity in liquid chamber, effectively can adsorb the bubble in ink, realize the filtration to black underwater bubble, and not affect the flowing of ink, thus effectively reduce the bubble of the ink entering into pressure chamber, make ink to be full of pressure chamber, improve the jet performance of shower nozzle, and, can also effectively avoid gas bubble blockage nozzle, ensure carrying out smoothly of image printing further.
Further, can also be provided with gripper shoe 24 below filter 22, the surrounding of gripper shoe 24 is fixedly connected with housing parts 21, and gripper shoe 24 is offered multiple crafters 241 passed through for bubble; This crafters 241 is communicated in accommodating cavity 26, enters into accommodating cavity 24 for bubble through crafters 241.It should be noted that, the crafters 241 in gripper shoe 24 can much larger than the mesh on the wire netting as filter 22, and a Main Function of this gripper shoe 24 as the support substrate of wire netting, can be convenient to processing and manufacturing.
Further, housing 10 can in rectangular-shaped, and inlet opening 102 can be opened on the end face of housing 10, and at least two nozzles 101 can be arranged on the bottom surface of housing 10 along the width of housing.
Housing parts 10 also can in the rectangle identical with housing 10 end face, and accordingly, the containing groove 23 at housing parts 10 top can be rectangle equally, and the second pod apertures 27 can vertically run through on the housing parts 10 that is opened in by this containing groove.Further, the projection at housing 10 top of the aperture of the second pod apertures 27 and ink-feeding hole 102 are at a distance of the first distance, and filter 22 can be positioned at below ink-feeding hole 102 and to be positioned at the side of the second pod apertures 27 towards ink-feeding hole 102.Namely, ink-feeding hole 102 is in the top of above-mentioned containing groove, and the first distance between ink-feeding hole 102 and the second pod apertures 27 can be determined according to the size of containing groove (or filter 22), after entering into liquid chamber to make ink by ink-feeding hole 102, the path flowing to the second pod apertures 27 is longer, thus ink is contacted more fully with filter 22, the adsorption filtration effect of the bubble in further enhancing filter 22 pairs of inks, to reduce the bubble in the ink that flow in pressure chamber 32 further.
Fig. 5 is the structural representation of degassed layer in another embodiment of printer head of the present invention; Fig. 6 is the cross-sectional view of Fig. 5; Another embodiment of the present invention provides a kind of printer head, with previous embodiment unlike, the version of filter 22 and different relative to the position of housing parts 21 in printer head in the present embodiment, other 26S Proteasome Structure and Function is then similar with previous embodiment.Please refer to Fig. 1,5 and 6, in the printer head that the present embodiment provides, housing parts 21 comprise point base plate 211 and be formed at point base plate 211 edge, perpendicular to point sidewall 212 of point base plate 211, point base plate 211 and divide a sidewall 212 to surround aforesaid containing groove 23; Filter 22 is vertically set on point base plate 211, and point base plate 211 surrounds a closed circular with a point sidewall 212, i.e. accommodating cavity 26, filter 22 is around in accommodating cavity 26 around.
Particularly, when containing groove 23 is rectangular, filter 22 is made up of highly identical four risers, and four risers surround a loop-like rectangle, the loop-like filter 22 of this rectangle is positioned at the containing groove 23 of housing parts 21, and surrounds loop-like accommodating cavity 26 with a point sidewall 212 for its periphery; Second pod apertures 27 can run through and is arranged on point base plate 211.Just described containing groove 23 on housing parts 21 directly can be entered into when ink enters into liquid chamber by ink-feeding hole 102, ink contacts with filter 22 simultaneously, under the super-hydrophobicity effect of filter 22, bubble in ink is just attracted on filter 22 surface inwardly, and on the dynamic filter 22 of transfer immediately surface outwardly, and then be stored in chamber resettling 26.
Certainly, can also be provided with gripper shoe 24 outside filter 22, gripper shoe 24 vertically can surround a rectangle closed with point base plate 211 equally, and together with the inner surface of gripper shoe 24 is fixedly installed with the outer surface of described filter 22; And gripper shoe 24 can be arranged equally multiple crafters passed through for bubble.
The printer head that the present embodiment provides except filter adopts above-mentioned structure, other concrete structure and previous embodiment similar, its concrete function implementation procedure is also similar with previous embodiment, repeats no more herein.
The printer head that the present embodiment provides, by arranging the filter with ultra-hydrophobicity in liquid chamber, bubble in adsorbable ink, realize the filtration to black underwater bubble, thus effectively reduce the bubble of the ink entering into pressure chamber, make ink to be full of pressure chamber, improve the jet performance of shower nozzle, further, can also effectively avoid gas bubble blockage nozzle, ensure carrying out smoothly of image printing further.
Each embodiment is only in order to illustrate technical scheme of the present invention above, is not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.