JP2006231799A - Inkjet head and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently form a filter for suppressing clogging with ink in a manufacturing process of a head. <P>SOLUTION: In the inkjet head 1, for constituting both an ink feeding passage 201 and a filter part 2f set on the ink feeding passage 201, first, a first and a second lamination plates 31b and 31a with a predetermined shaped part 32a and a non-shaped part 32b in the profile are formed. Moreover, the first and second lamination plates 31b and 31a are alternately combined and joined each other. Thus an inkjet head manifold 2 of a form with the ink feeding passage 201 and the filter part 2f arranged on the passage can be constructed. The passage of ink and the filter part 2f can be formed simultaneously, so that the productivity of the inkjet head 1 can be improved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an inkjet head used in an inkjet printer and a method for manufacturing the inkjet head.

  Conventional ink jet printers are printing apparatuses that perform printing by spraying fine particles of ink onto an output substrate. The ink jet head of this ink jet printer uses a heating method in which ink is ejected by bubbles generated by heating the ink, and a piezoelectric method in which an electric signal is converted into a mechanical displacement by the piezoelectric effect and ink is ejected. The

In addition, we also propose an inkjet head that ejects ink by applying appropriate magnetic force to a film-like member that has flexibility and magnetism that can be deformed so as to eject ink stored in the liquid chamber. (For example, refer to Patent Document 1).
JP 2005-7633 A

  Here, as proposed in the above-mentioned literature, countermeasures against ink clogging and the like are important items in configuring this type of head for ejecting fine particles. There is also a demand for efficiently providing a head with a mechanism for suppressing clogging of ink.

  Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an ink jet head capable of efficiently providing a filter for suppressing clogging of ink in the process of manufacturing the head and a method for manufacturing the same. And

  In order to achieve the above object, an ink jet head according to the present invention includes an ink jet head manifold having an ink flow path formed by integrating a plurality of types of laminated plates having different shapes, and the ink of the ink jet head manifold. And a filter portion formed by a combination of a tangible portion and a non-tangible portion of the cross-sections of the laminated plates joined to each other.

  That is, in the present invention, in order to configure the ink flow path and the filter portion provided on the flow path, a plurality of types of laminated plates having predetermined tangible portions and non-tangible portions in the cross-sectional shape are formed. By combining these in a predetermined order and joining them together, an ink jet head having an ink flow path and an ink jet head manifold in which a filter portion is disposed on the flow path can be configured. Therefore, according to the present invention, the filter portion can be formed simultaneously with the formation of the ink flow path, so that the productivity of the inkjet head can be improved. More specifically, such a filter portion is substantially disposed in a portion where the ink flow path extends in a direction along the surface of the laminate, and exhibits a filter function for the ink flowing through this portion. .

  Here, the filter unit described above includes, for example, a first laminated plate in which an edge on the ink supply side is opened and a second laminated plate in which the edge on the ink supply side is closed. It can be formed by alternately laminating plates. Moreover, such a filter part can also be comprised combining the 3rd laminated board which has the recessed part formed, for example by half etching etc. by removing a part of board thickness.

An ink jet head according to the present invention is provided on an ink jet head manifold having an ink flow path formed by integrating a plurality of types of laminated plates having different shapes, and the ink flow path of the ink jet head manifold. And a filter portion formed by an assembly of a plurality of through holes perforated in at least one of the laminated plates.
In the ink jet head of the present invention, the filter portion is substantially disposed at a portion where the ink flow path extends in the thickness direction of the laminated plate, and exhibits a filter function for the ink flowing through this portion.

  Further, the inkjet head manufacturing method of the present invention includes a plurality of types having a predetermined tangible portion and a non-tangible portion in a cross-sectional shape for constituting at least an ink flow path and a filter portion provided on the ink flow path. A laminated plate forming step for forming the laminated plate, and a plurality of types of laminated plates formed in the laminated plate forming step are combined in a predetermined order to join each other, and the ink flow path and the filter unit are provided. And an inkjet head manifold forming step of forming an inkjet head manifold.

  Here, in the above-described laminated plate forming step, a non-product portion that holds the tangible portion for configuring the filter portion that is separated from the main body portion of the laminated plate is formed integrally with the laminated plate outside the outer portion of the laminated plate. In addition, in the inkjet head manifold forming step, a method of removing the non-product part after bonding the laminated plate together with the non-product part can be employed.

  Thus, according to the present invention, it is possible to provide an ink jet head capable of efficiently providing a filter for suppressing ink clogging in the process of manufacturing the head, and a method for manufacturing the same.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a diagram showing an overall schematic configuration of an inkjet head according to a first embodiment of the present invention, FIG. 2 is a plan (top) view showing the inkjet head of FIG. 1, and FIG. 3 is an inkjet of FIG. It is a figure which shows the bottom face of a head. FIG. 4 is an exploded perspective view showing the structure of the inkjet head of FIG.

  As shown in FIG. 1, the ink jet head 1 of this embodiment includes a metal ink jet head manifold 2. As shown in FIGS. 1 and 4, the inkjet head manifold 2 includes a plurality of types of metal first channel formation laminates 21 to 5 (fifth type in the example shown in FIG. 2). A plurality of laminated plates 25 (for example, 25 to 250) are laminated. The first flow path forming laminate 21 to the fifth flow path forming laminated plate 25 are made of a metal (for example, SUS304) plate material having a thickness of 0.02 mm to 0.2 mm, for example. Are formed in a block shape by pressure bonding with each other by diffusion bonding or the like.

  Further, as shown in FIGS. 3 and 4, the orifice plate 3 having a plurality of ink discharge holes 3a (diameter, for example, 0.01 mm to 0.1 mm) formed on the bottom surface of the inkjet head manifold 2 is diffused as described above. It is joined by joining. The orifice plate 3 is made of the same material (for example, SUS304) as the inkjet head manifold 2 and has a thickness of 0.05 mm to 0.2 mm, for example. As shown in FIGS. 3 and 4, the ink ejection holes 3 a are arranged, for example, in a line on the orifice plate 3.

  Further, as shown in FIGS. 2 and 3, a diaphragm (foil) 4 is bonded to each side surface of the inkjet head manifold 2 by diffusion bonding or the like. The diaphragm 4 is made of the same material (for example, SUS304) as the inkjet head manifold 2 and has a thickness of 0.01 mm to 0.05 mm, for example.

  An FPC (Flexible Printed Circuit) 5 in which a conductor pattern of a predetermined shape is formed by an adhesive or the like is attached to the outer surface of the diaphragm 4. The FPC 5 is attached with, for example, an adhesive. The piezoelectric element 6 is joined using wear or the like. The piezoelectric element 6 is a piezo element made of a material such as PZT, and has a thickness of, for example, 0.5 mm to 2 mm. In the piezoelectric element 6, a plurality of electrodes corresponding to the respective ink discharge holes 3a are formed by a method such as vapor deposition, and these electrodes are electrically connected to a conductor pattern formed in the FPC 5, respectively. ing.

  As shown in FIG. 4, the first flow path forming laminated plates 21 to the fifth flow path forming laminated plates 25 are arranged symmetrically from the first flow path forming laminated plate 21 arranged in the center toward both sides in the laminating direction. Ink flow paths are formed from the central portion toward both sides in the stacking direction. The ink flow paths on both sides are formed at positions where one side and the other side are slightly shifted.

  The first flow path forming laminated plate 21 disposed in the central part is provided with openings for forming the ink supply flow path 201, the ink reservoir 202, and the ink discharge part 207. The second flow path forming laminate 22 disposed outside the first flow path forming laminate 21 includes an opening for forming the ink supply flow path 201 and the ink reservoir 202, and a lower ink flow. An opening for forming the path 206 is provided.

  The third flow path forming laminate 23 disposed outside the second flow path forming laminate 22 is provided with openings for forming the lower ink flow path 206 and the upper common ink flow path 203. It has been. In addition, an opening for forming a lower ink channel 206 and an upper individual ink channel 204 is formed in the fourth channel forming laminate 24 arranged outside the third channel forming laminate 23. Is provided.

In addition, the fifth flow path forming laminate 25 arranged on the outermost side is provided with an opening for forming the vertical ink flow path 205.
By laminating a predetermined number of the first flow path forming laminated plates 21 to the fifth flow path forming laminated plates 25 having the above configuration in a predetermined order and press-bonding them, the ink supply flow path 201 is provided in the inkjet head manifold 2. The ink flow path from the center to the ink ejection part 207 is formed from the central part in the stacking direction toward both sides, and as shown in FIGS. 1 and 4, the ink supply hole 2 a ( The ink flow path is opened through a filter 2f) described later.

  Ink supply to the inkjet head manifold 2 is performed from the ink supply hole 2a. The ink supplied from the ink supply hole 2a (filter 2f) passes through the ink supply channel 201 and is introduced into the ink reservoir 202. From the ink reservoir 202, the upper common ink channel 203 and the upper individual ink are supplied. The ink passes through the flow path 204, the vertical ink flow path 205, and the lower ink flow path 206 in this order, and fills the ink discharge unit 207.

  Further, when a drive signal is applied to the piezoelectric element 6 through the flexible substrate 5 in a state where the ink is filled in the ink jet head manifold 2 as described above, the piezoelectric element 6 in the portion to which the drive signal is applied is deformed. As a result, the vibration plate 3 of the corresponding portion vibrates and further presses the ink in the vertical ink flow path 205 of the corresponding portion, and a predetermined amount of ink is discharged from the corresponding ink discharge hole 3a of the orifice plate 3. Will be.

  Next, the filter 2 f provided on the ink supply flow path 201 (ink supply hole 2 a) in the first flow path formation laminated plate 21 and the second flow path formation laminated plate 22 constituting a part of the inkjet head manifold 2. The structure and the manufacturing method thereof will be described with reference to FIGS. Here, FIG. 5 is a perspective view showing the base material plate 30 for forming the first and second flow path forming laminated plates 21 and 22. 6 is a plan view of the filter portion viewed from the direction along the surface of the first and second flow path forming laminates 21 and 22, and FIG. 7 is the first and second flow path forming laminate shown in FIG. It is a figure which shows the AA cross section (before removal of the discard part 34a as a non-product part mentioned later) of the plates 21 and 22. FIG. FIG. 8 is a view showing a BB cross section of the first and second flow path forming laminated plates 21 and 22 shown in FIG. 6 (before removal of the discarding portion 34b).

  FIG. 6 is a view after removal of the discard portion 34a which is a non-product portion connected to the first and second flow path forming laminates 21 and 22, and the cross hatch portion of FIG. It does not indicate the shape, but is a filled portion for making it easier to visually grasp the tangible portion of the laminate and the non-tangible portion that becomes the opening. Furthermore, in this embodiment, the laminated plates for constituting the filter 2f in the first and second flow path forming laminated plates 21 and 22 will be described as the second laminated plate 31a and the first laminated plate 31b.

  That is, as shown in FIGS. 5 and 6, the filter portion 2 f is supplied with the first laminated plate 31 b having an opening on the side to which the ink is supplied (the portion where the ink supply hole 2 a is formed) and the ink. The second laminated plate 31a with the end edge (the portion where the ink supply hole 2a is formed) closed is alternately laminated. Specifically, as shown in FIGS. 5 to 8, for example, by forming a base material plate 30 made of SUS304, the first and second discarded portions 34 a and 34 b are connected to the upper portions of their outer shapes. Two laminated plates 31b and 31a are formed. That is, as shown in FIGS. 5 to 8, the filter portion 2 f is formed by alternately combining the tangible portion 32 a and the non-tangible portion (intangible portion) 32 b in the cross section between the laminated plates 31 a and 31 b to be joined to each other. Is done. As a result, as shown in FIG. 6, a plurality of slit portions arranged in parallel to each other serve as ink flow paths.

  Therefore, in the inkjet head 1 of the present embodiment, in order to configure the ink supply flow path 201 and the filter portion 2f provided on the ink supply flow path 201, first, a predetermined tangible portion 32a and a non-tangible shape are formed in the cross-sectional shape. First and second laminated plates 31b and 31a having a portion 32b are formed. Furthermore, the first and second laminated plates 31b and 31a are alternately combined (in a predetermined order) and joined together to form an ink supply channel 201 and an ink jet head in which a filter unit is disposed on the channel. A head including the manifold 2 can be configured. As a result, the filter portion can be formed simultaneously with the formation of the ink flow path, so that the productivity of the inkjet head 1 can be improved.

(Second Embodiment)
The ink jet head according to this embodiment includes a filter portion 2g as shown in FIGS. 9 to 11 instead of the filter portion 2f provided in the ink jet head 1 of the first embodiment. Yes. Here, FIG. 9 is a plan view of the filter portion 2g configured by alternately joining the second laminated plate 31a and the first laminated plate 31d as seen from the direction along the surface of these laminated plates, 10 is a cross-sectional view taken along the line CC (before removal of the discarding portion 34a) of the second laminated plate 31a shown in FIG. FIG. 11 is a diagram showing a DD cross section (before removal of the discarding portion 34d) of the first laminated plate 31d shown in FIG.

  That is, as shown in FIGS. 9 to 11, the filter unit 2g diverts the second laminated plate 31a applied to the filter unit 2f and replaces the first laminated plate 31b of the filter unit 2f. A first laminated plate 31d is used. Here, the first laminated plate 31b described above has the non-tangible portion 32b that opens to the edge of the laminated plate (the portion where the ink supply hole 2a is formed) over the entire width of the ink supply channel 201. On the other hand (see FIG. 8), the edge (the portion where the ink supply hole 2a is formed) of the first laminated plate 31d of this embodiment has non-tangible portions 32d arranged alternately in the width direction of the ink supply channel 201. And a tangible portion 35b. That is, as shown in FIGS. 9 to 11, the filter portion 2g is formed by alternately combining the tangible portions 32a of the cross sections of the laminated plates 31a and 31d to be joined together, and the tangible portions 35d and the non-tangible portions 32d. Is done. Thereby, as shown in FIG. 9, the filter part 2f will be formed in a grid | lattice form.

  Further, in particular, in the step of forming the first laminated plate 31d, as shown in FIG. 11, for the configuration of the filter unit separated from the main body portion of the first laminated plate 31d (with the non-tangible portion 32d interposed therebetween). A discarding portion 34d (non-product portion) for holding the tangible portion 35d is integrally formed on the outside of the outer portion of the laminated plate together with the laminated plate. Furthermore, in the step of forming the inkjet head manifold 2, after the second and first laminated plates 31a and 31d are alternately joined together with the discarding part 34d (and the discarding part 34a) which is a non-product part, the discarding part 34d, By removing 34a, the filter unit 2g shown in FIGS. 9 to 11 can be configured. Since the filter portion 2g is formed in a lattice shape as shown in FIG. 9, the effect of suppressing ink clogging can be improved.

(Third embodiment)
The ink jet head according to this embodiment includes a filter portion 2h as shown in FIG. 12, instead of the filter portion 2f provided in the ink jet head 1 of the first embodiment. Here, FIG. 12 is a plan view of the filter portion 2h formed by alternately joining the second laminated plate 31a and the third laminated plate 31e, as viewed from the direction along the surface of these laminated plates. FIG.

  That is, as shown in FIG. 12, the filter portion 2h of this embodiment has a recess (non-tangible portion) 32e formed by removing a part of the plate thickness (for example, half the thickness) by half etching or the like, for example. The third laminated plate 31e and the above-described second laminated plate 31a are combined. Therefore, also in this filter part 2h, the suppression effect with high ink clogging can be expected. Of course, the filter section can be configured by simply laminating a plurality of third laminated plates 31e continuously without using the second laminated plate 31a.

(Fourth embodiment)
The ink jet head according to this embodiment includes a filter portion 203a as shown in FIGS. 13 to 15 instead of the filter portion 2f provided in the ink jet head 1 of the first embodiment. Yes. Here, FIG. 13 is a perspective view schematically showing a filter 203 a provided on the upper common ink flow path 203 in the plurality of third flow path forming laminates 23 constituting a part of the inkjet head manifold 2. is there. FIG. 14 shows in detail the structure of the filter part 203a formed on the fourth laminated plate 31f included in at least one of the plurality of third flow path forming laminated plates 23 shown in FIG. FIGS. 15A and 15B are exploded perspective views showing the fourth laminated plate 31f and the fifth laminated plate 31g included in the plurality of third flow path forming laminated plates 23 shown in FIG. FIG. 16 is a perspective view for explaining the filter function exhibited by the filter unit 203a shown in FIGS. 13 to 15 while comparing with the filter units 2f, 2g, and 2h of the first to third embodiments. is there.

  That is, as shown in FIGS. 13 to 15, the filter portion 203 a of this embodiment is perforated on the fourth laminated plate 31 f included in at least one of the plurality of third flow path forming laminated plates 23. This is realized by an assembly of a plurality of through holes 203b. Here, the filter portion 203a is formed by a fourth laminated plate 31f and a region where a plurality of through holes 203b are formed in the fourth laminated plate 31f (a region surrounded by a one-dot chain line in FIGS. 13 and 15). 203a) and a fifth laminated plate 31g having a single through-hole 203e perforated so as to include at least the entire region corresponding to 203a) are laminated in a predetermined combination order or alternately laminated one by one. . Here, the fourth and fifth laminated plates 31f and 31g are laminated in a predetermined combination order, for example, two to three fifth laminated plates 31g are continuously laminated, and the second to third sheets For example, a laminated structure in which one fourth laminated plate 31f is sequentially interposed between the laminated groups of the five laminated plates 31g is included. In addition, you may change suitably the number of continuous lamination | stacking of the lamination | stacking group of the 5th laminated board 31g, for example in the range of about 2-10 sheets. In addition, the filter unit in which the fourth and fifth laminated plates 31f and 31g are alternately laminated one by one interposes, for example, one fourth laminated plate 31f in the plurality of fifth laminated plates 31g. The filter function can be improved as compared with the above. Furthermore, you may form the filter part 203f by laminating | stacking the said 4th laminated board 31f which has several through-holes 203b continuously. In this case, further improvement of the filter function can be expected as compared with the filter unit in which the fourth and fifth laminated plates 31f and 31g are alternately laminated.

Further, as shown in FIG. 16, the filter sections 2f, 2g, and 2h shown in the first to third embodiments are configured such that the ink flow path (for example, the ink supply flow path 201) is a laminated plate (for example, the second flow path). Formed substantially in a portion extending in the direction (ink flow direction) H along the surface of the laminate 22), and the ink flowing in this portion, that is, the ink flowing in the direction along the surface of the laminate The filter function was demonstrated.
On the other hand, as shown in FIGS. 13 to 15, in the filter unit 203 a of this embodiment, the ink flow path is in the thickness direction of the laminated plate (the third flow path forming laminated plate 23 in this embodiment) (ink The filter function is exhibited with respect to the ink flowing in this portion, that is, the ink flowing in the thickness direction of the laminated plate.

Further, the structure of the plurality of through holes 203b on the fourth laminated plate 31f will be described in detail.
By performing an etching process or the like on the surface of the fourth laminated plate 31f, the shape of each through-hole 203b is such that the area of the opening 203d on one surface side of the fourth laminated plate 31f is the other surface side. It is formed so as to be larger than the area of the opening 203c. Specifically, the shape of each through-hole 203b is formed in a mortar shape (or conical shape), for example. Here, as shown in FIGS. 13 and 14, the mortar-shaped through-hole 203b is directed to the upstream side of the upper common ink flow path 203 (upstream side of the ink flow direction T) in the fourth laminated plate 31f. The area of the opening 203d on the other surface side is formed to be larger than the area of the opening 203c on the other surface side facing the downstream side (downstream side in the ink flow direction T) of the upper common ink flow path 203. . Further, instead of this configuration, the opening 203c on the other surface side with the smaller opening area is directed upstream with respect to the ink flow direction T, and the opening 203d on the one surface side with the larger opening area is directed with the ink flow direction T. You may comprise the 4th laminated board 31f so that it may face in the downstream of this.

  Here, the reason why the individual through holes 203b are formed in such a shape is that, for example, when the fourth laminated plates 31f are continuously laminated, the fourth laminated plates 31f adjacent to each other are laminated. In order to be able to absorb this positional deviation by providing a difference in the opening area between the opening 203c and the opening 203d even if they are joined in a state where the positional deviation occurs in the direction along the surface of the plate. is there. That is, in the joined state of the fourth laminated plates 31f, for example, in the opening region of the opening 203d on the upstream side in the ink flow direction T, the positional deviation of the opening 203c occurs in the direction along the surface of the laminated plate. This is because the opening 203c is not blocked. Thereby, the positioning accuracy of the fourth laminated plates 31f can be relaxed. Here, in consideration of the fluidity of the ink, it is desirable to direct the opening 203d on one side having a large opening area toward the upstream side in the ink flow direction T as shown in FIG. Further, as shown in FIG. 14, in the above-described configuration example in which the fourth and fifth laminated plates 31f and 31g are alternately laminated, a region where the filter portion 203a is formed between the filter portion 203a and the filter portion 203a. The through-hole 203e drilled including the whole functions as a liquid reservoir, and as above, stacking misalignment (position misalignment) between adjacent stacked plates can be allowed.

Further, the diameter of the peripheral portion of the opening 203c on the downstream side in the ink flow direction T in each through-hole 203b of the filter portion 203a is the same as the diameter of the through-hole 203b that penetrates the fourth laminated plate 31f in the plate thickness direction. Become. The diameter of the through hole 203b is, for example, 0.0001 mm (0.1 μm) to 0.1 mm in diameter. Further, in the first embodiment, the diameter of the plurality of ink ejection holes 3a on the orifice plate 3 joined to the bottom surface of the inkjet head manifold 2 is exemplified as a diameter of 0.01 mm to 0.1 mm, for example. .
Here, in the present embodiment, it is desirable that the diameter of the through hole 203b is smaller than the diameter of the ink discharge hole 3a. Accordingly, it is possible to reliably discharge the ink that has been filtered in the process of passing through the through hole 203b to the outside from the ink discharge hole 3a.

  The present invention has been specifically described above with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, the processing method of each laminated plate is not particularly described, but for example, etching or laser processing can be applied to the processing of the laminated plate. Further, as a material for the laminated plate, various stainless steels including SUS304 described above are suitable. Further, as shown in FIG. 17, the filter portions 2f, 2g, and 2h shown in the first to third embodiments described above are formed at the ink supply hole 2a, that is, the ink flow path (for example, the ink supply flow path). However, instead of this, a filter having substantially the same structure as the filter portion 2f and the filter portion 2h may be provided in the middle G of the ink flow path. As shown in FIG. 18, the filter section provided in the middle G of the ink flow path includes, for example, a laminated plate 31h in which the middle of the ink supply flow path 201 is closed by a tangible portion 32g, and the middle G of the ink supply flow path 201. Is formed by alternately stacking laminated plates 31b that are not closed (while being opened).

1 is a diagram illustrating a schematic configuration of an inkjet head according to a first embodiment of the present invention. FIG. 2 is a plan (top) view showing the inkjet head of FIG. 1. The figure which shows the bottom face of the inkjet head of FIG. FIG. 2 is an exploded perspective view showing a structure of the ink jet head of FIG. 1. FIG. 3 is a perspective view showing a base material plate for forming first and second flow path forming laminates constituting a part of the ink jet head of FIG. 1. The top view which looked at the filter part from the direction along the surface of the 1st, 2nd flow path formation laminated sheet. The figure which shows the AA cross section (before removal of a discard part) of the 1st, 2nd flow path formation laminated board shown in FIG. The figure which shows the BB cross section (before removal of a discard part) of the 1st, 2nd flow path formation laminated board shown in FIG. The top view which looked at the filter part provided in the inkjet head which concerns on the 2nd Embodiment of this invention from the direction along the surface of the 1st, 2nd laminated board. The figure which shows CC cross section (before removal of a discard part) of the 2nd laminated board shown in FIG. The figure which shows the DD cross section (before removal of a discard part) of the 1st laminated board shown in FIG. The top view which looked at the filter part provided in the inkjet head which concerns on the 3rd Embodiment of this invention from the direction along the surface of the 1st, 2nd laminated board. The perspective view which shows roughly the filter part provided in the inkjet head which concerns on the 4th Embodiment of this invention. The figure which shows the structure of the filter part shown in FIG. 13 in detail. The disassembled perspective view which shows the 4th laminated board shown in FIG. 13, and a 5th laminated board. The perspective view for demonstrating comparing the filter function which the filter part shown in FIGS. 13-15 shows with the filter part shown in FIGS. The figure which shows the filter part provided in the middle of the flow path of an ink. The perspective view which shows the structure of the laminated plate for comprising the filter part of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Inkjet head, 2 ... Inkjet head manifold, 2a ... Ink supply hole, 2f, 2g, 2h ... Filter, 21 ... 1st flow path formation laminated board, 22 ... 1st flow path formation laminated board, 23 ... 1st flow Path forming laminate, 24... 1st flow path forming laminate, 25... 5th flow path forming laminate, 31a... 2nd laminate, 31b, 31d ... 1st laminate, 31e. , 31f: fourth laminated plate, 31g: fifth laminated plate, 32a: tangible portion, 32b, 32d ... non-tangible portion, 32e ... concave portion (non-tangible portion), 34a, 34b, 34d ... discarding portion, 35d ... Tangible part 201... Ink supply channel 203 a... Filter part 203 b and 203 e through hole 205 205 vertical ink channel 206 206 lower ink channel

Claims (18)

An inkjet head manifold having an ink flow path formed by integrating a plurality of types of laminated plates having different shapes;
A filter unit formed on the ink flow path of the inkjet head manifold and formed by a combination of a tangible part and a non-tangible part of the cross-sections of the laminated plates joined together;
An ink jet head comprising: The filter unit is
2. The ink jet head according to claim 1, wherein the ink jet head manifold is provided at an end portion or in the middle of the ink flow path of the ink jet head manifold. The filter unit is
A first laminate having an opening on an edge to which ink is supplied;
A second laminated plate in which the edge on the ink supply side is closed;
3. The ink jet head according to claim 1, wherein the ink jet head is constituted by a combination of the above.   4. The inkjet head according to claim 3, wherein the filter unit is configured by alternately laminating the first laminated plate and the second laminated plate.   The inkjet head according to any one of claims 1 to 4, wherein the filter section is formed in a shape in which a plurality of slits are arranged in parallel or in a lattice shape.   The said filter part is comprised combining the 3rd laminated board which has a recessed part formed by removing a part of board thickness, The structure of any one of Claim 1 thru | or 5 characterized by the above-mentioned. Inkjet head. An inkjet head manifold having an ink flow path formed by integrating a plurality of types of laminated plates having different shapes;
A filter unit provided on the ink flow path of the inkjet head manifold and formed by an assembly of a plurality of through holes formed in at least one of the laminated plates;
An ink jet head comprising:   8. The ink jet head according to claim 7, wherein the filter portion is configured by continuously laminating the laminated plate in which the aggregate of the plurality of through holes is formed. The filter unit is
A laminated board having a plurality of through-hole aggregates formed thereon, and a laminated board having a single through-hole perforated including the entire area corresponding to the formation area of the aggregated through-holes in the laminated board. 9. The ink jet head according to claim 7, wherein the ink jet head is constituted by laminating in a predetermined combination order or alternately laminating one by one.   The hole diameter of each through hole formed as an aggregate in the laminated plate is smaller than the hole diameter of the discharge hole for discharging ink from the inkjet head manifold to the outside. The inkjet head described in 1.   The shape of each through-hole formed as an aggregate in the laminated board is such that the opening area on one side of the laminated board is larger than the opening area on the other side. An ink jet head according to any one of claims 7 to 10. A laminated plate forming step of forming a plurality of types of laminated plates having a predetermined tangible portion and a non-tangible portion in a cross-sectional shape for constituting at least an ink flow path and a filter portion provided on the ink flow path;
An inkjet head manifold forming step of combining a plurality of types of laminated plates formed in the laminated plate forming step in a predetermined order and joining together to form an inkjet head manifold having the ink flow path and the filter section; ,
A method of manufacturing an ink jet head, comprising: The filter unit is
The method of manufacturing an inkjet head according to claim 12, wherein the inkjet head manifold is formed at an end portion or in the middle of the ink flow path of the inkjet head manifold. In the laminate forming process,
The first laminated plate having an open edge on the ink supply side and the second laminated plate having the ink supplied side closed block constitute the filter unit. 14. The method of manufacturing an ink jet head according to claim 12, wherein the ink jet head is formed as a laminated plate.   15. The method of manufacturing an ink-jet head according to claim 14, wherein in the ink-jet head manifold forming step, the first laminated plate and the second laminated plate are alternately laminated.   16. The method of manufacturing an ink jet head according to claim 12, wherein the filter unit is formed in a shape in which a plurality of slits are arranged in parallel or in a lattice shape. In the laminate forming process,
17. The third laminated plate having a concave portion formed by removing a part of the plate thickness is formed as a laminated plate for constituting the filter portion. The manufacturing method of the inkjet head as described in any one of. In the laminated plate forming step, a non-product part for holding a tangible portion for constituting a filter part separated from a main body portion of the laminated plate is formed integrally with the laminated plate on the outer side of the laminated plate,
18. The inkjet head manufacturing method according to claim 12, wherein, in the inkjet head manifold forming step, the non-product portion is removed after the laminated plate is bonded together with the non-product portion. Method.

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