JP2006231796A - Inkjet head and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet head which can reduce assembling errors of members by preventing a plurality of flat plates from being united (metal-joined) while layered by a wrong order in the inkjet head formed with the plurality of layered flat plates, and to provide its manufacturing method, and a manufacturing method for an inkjet head which enables simple and highly precise measurement of a positioning accuracy. <P>SOLUTION: In the inkjet head, a visual marker such as a tab which constitutes a predetermined pattern in a thickness direction when the plurality of flat plates are layered is attached to an edge which is abandoned after layering of the flat plates or an edge which does not become a face where ink discharge holes are formed after layering. Moreover, a relative positioning accuracy is checked after layering/uniting of the flat plates by using this visual marker. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an inkjet head and a manufacturing method thereof.

  Conventionally, an inkjet head formed by laminating a plurality of flat plates formed in a predetermined shape and a manufacturing method thereof have been disclosed (for example, Patent Document 1 and Patent Document 2).

Further, as a method for measuring the relative positioning accuracy of each flat plate, conventionally, the accuracy is measured on the basis of the outer shape, or the measurement is performed by cutting a member.
JP 2003-277719 A JP 2004-009344 A

  However, since a plurality of flat plates having the same outer shape are stacked, there is a risk that the stacking order is wrong. Since there is no means to peel off the flat plates after they have been integrated by pressure bonding, there is a problem that if they are integrated while being stacked in the wrong order, they must be discarded and the members are wasted. In addition, there was a problem that waste was large in terms of work man-hours because the error was not noticed until the water flow test was performed.

  Conventionally, the relative positioning accuracy of each flat plate is often measured on the basis of the external shape. However, the dimensional accuracy greatly varies depending on the process conditions at the time of manufacturing the parts, and there is a problem that the relative positioning accuracy of the flat plates is not reliable.

  The present invention has been made to solve such a problem, and reduces the risk of integration with the wrong stacking order, and more accurately and easily confirms the positioning accuracy of each flat plate. An object of the present invention is to provide an inkjet head that can be manufactured and a method for manufacturing the same.

  In order to solve the above-described problem, an ink jet head according to a first aspect of the present invention is an ink jet head formed by laminating a plurality of flat plates. A visual marker or an optical marker that forms a predetermined pattern in the thickness direction at the time of stacking is attached to an edge portion that does not become a surface on which the rear ink discharge hole is formed.

  The inkjet head according to the second aspect of the present invention is an inkjet head formed by laminating a plurality of flat plates, and has an edge portion or post-laminating ink discharge hole that becomes a discarded material after laminating the plurality of flat plates. The edge which does not become the surface to form is provided with the tab which forms the outline of a predetermined inclination in the thickness direction at the time of lamination | stacking.

  An ink jet head according to a third aspect of the present invention is an ink jet head formed by laminating a plurality of flat plates, and has an edge portion or post-laminating ink discharge hole which becomes a discarded material after the lamination of the plurality of flat plates. A concave portion or a convex portion that forms a straight line or a curved line that is inclined with respect to the thickness direction at the time of lamination is formed on an edge portion that does not become a surface to be formed.

  The inkjet head according to the fourth aspect of the present invention is an inkjet head formed by laminating a plurality of flat plates, and has an edge portion or post-laminating ink discharge hole that becomes a discarded material after laminating the plurality of flat plates. A hole portion that forms a see-through communication hole that is inclined with respect to the thickness direction at the time of lamination is formed at an edge portion that does not become a surface to be formed.

  In addition, an inkjet head manufacturing method according to a fifth aspect of the present invention is an inkjet head manufacturing method formed by laminating a plurality of flat plates. At the edge that does not form the surface to form the ink ejection holes, a visual mark or an optical mark is attached at a position different from that of at least an adjacent flat plate or a flat plate constituting a different member so as to form a predetermined pattern in the thickness direction at the time of lamination. A step of forming a plurality of flat plates constituting the inkjet head, a stacking step of stacking the flat plates in a predetermined order, and an integration step of integrating the flat plates stacked in the predetermined order. It is characterized by that.

  According to a sixth aspect of the present invention, there is provided a method of manufacturing an ink jet head according to the fifth aspect of the present invention, comprising the step of confirming the relative positioning accuracy of each flat plate using the marker at least before the integration step. Furthermore, it is characterized by having.

  In addition, in the manufacturing method of the ink jet head according to the seventh aspect of the present invention, in the manufacturing method according to the fifth or sixth aspect, when the marked part is a waste material, or the mark is a convex part. In this case, the method further includes a step of cutting and removing the discard member to which the mark is attached or the convex portion serving as the mark after the integration step.

  According to the present invention, it is possible to prevent the flat plates from being integrated while the order of stacking is wrong, and to reduce assembly errors of the flat plates constituting the inkjet head.

  Furthermore, according to the present invention, it is possible to measure a simple and highly accurate positioning accuracy.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 4 show a configuration of an inkjet head according to an embodiment of the present invention.

  As shown in FIG. 1, the ink jet head 1 includes a metal ink jet head block 2. As shown in FIGS. 1 and 2, one ink supply hole 2 a is formed on the upper surface of the inkjet head block 2.

  As shown in FIG. 4, the inkjet head block 2 includes a plurality of types (in the example shown in FIG. 4, roughly five types) of metal first flow path forming laminated plates 21 to fifth flow path forming laminated plates 25 ( Each plate is also formed by laminating a plurality of sheets (for example, 25 to 250 sheets). These first flow path forming laminated plates 21 to 5 flow path forming laminated plates 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 integrally formed by pressure bonding by diffusion bonding or the like, and formed into a block shape.

  3 and 4, an orifice plate 3 having a plurality of ink ejection holes 3a (diameter, for example, 0.01 mm to 0.05 mm) is formed on the bottom surface of the inkjet head block 2 by diffusion bonding or the like. It is joined. The orifice plate 3 is made of the same material (for example, SUS304) as the inkjet head block 2 and has a thickness of 0.05 mm to 0.2 mm, for example. As shown in FIG. 3, the ink discharge holes 3a are formed in one row.

  Moreover, as shown in FIG. 4, a diaphragm (foil) 4 is bonded to both surfaces of the inkjet head block 2 by diffusion bonding or the like. The diaphragm 4 is made of the same material (for example, SUS304) as the inkjet head block 2 and has a thickness of 0.01 mm to 0.05 mm, for example.

  An FPC (flexible printed circuit board) 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. A piezoelectric element 6 is bonded to the FPC 5 by thermocompression bonding or the like. It is joined by. The piezoelectric element 6 is made of PZT or the like and has a thickness of 0.5 mm to 2 mm, for example. In the piezoelectric element 5, electrodes corresponding to the respective ink discharge holes are formed by a method such as vapor deposition, and these electrodes are electrically connected to a conductor pattern formed in the FPC 5.

  The first flow path forming laminate 21 to the fifth flow path forming laminated plate 25 shown in FIG. 4 are symmetrically arranged 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 in the same line on one side and the other side as in the ink discharge holes 3a shown in FIG.

  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.

  The fifth flow path forming laminate 25 disposed on the outermost side is provided with an opening for forming the vertical ink flow path 205.

  By stacking a predetermined number of the first flow path forming laminated plates 21 to the fifth flow path forming laminated plates 25 in the above-described configuration in a predetermined order and press-bonding them, the ink supply flow path 201 is provided in the inkjet head block 2. An ink flow path extending from the center to the ink discharge portion 207 is formed from the central portion in the stacking direction toward both sides. As shown in FIGS. 1, 2, and 4, the ink supply hole 2 a is opened above the inkjet head block 2.

  Ink supply to the inkjet head block 2 is performed from the ink supply hole 2a. Then, the ink supplied from the ink supply hole 2a is introduced into the ink reservoir 202 through the ink supply channel 201, and from the ink reservoir 202, the upper common ink channel 203, the upper individual ink channel. 204, the ink flow passes through the vertical ink flow path 205 and the lower ink flow path 206 in this order, and the ink discharge unit 207 is filled.

  When a drive signal is applied to the piezoelectric element 6 through the flexible substrate 5 in a state where the ink jet head block 2 is filled with ink 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 4 of the corresponding part is vibrated, the ink in the vertical ink flow path 205 of the corresponding part is pressed, and a predetermined amount of ink is discharged from the corresponding ink discharge hole 3 a of the orifice plate 3. It has become.

  FIGS. 5-7 shows an example of a structure of the flow-path formation laminated board which comprises the inkjet head block 2 which concerns on this embodiment.

  FIG. 5 shows how the flat plates constituting the first flow path forming laminate 21 to the fifth flow path forming laminated plate 25 shown in the left half of FIG. 4 are laminated in a predetermined order. 6 is a top view of a state in which the flat plates in FIG. 5 are stacked in a predetermined order, and FIG. 7 is a top view of a state in which some flat plates are stacked in the wrong order. It is. In FIGS. 6 and 7, in order to emphasize and show the state in which the upper sides of the trapezoidal tabs are arranged, a group of the upper sides of the tabs are indicated by hatching, and the horizontal lines indicating the boundaries between the plates are omitted.

  As shown in FIG. 5, tabs 71 to 75 (hereinafter collectively referred to as tabs T) are respectively attached to the first flow path forming laminated plates 21 to the fifth flow path forming laminated plates 25. At the base of the tab T, a boundary line with the flow path forming laminated plate is formed by half etching or the like, so that it can be easily cut finally. These tabs T are formed together (integrally) when these flow path forming laminates are formed. The contour lines of the flow paths and the tabs are processed by a known processing method such as etching or blasting.

  Each tab T has a shape in which its center and contour coincide. Each tab T is attached to the same position regardless of the plate as long as it is the same type of flow path forming laminated plate. For example, if it is the 3rd flow path formation laminated board 23, the tab 73 is attached | subjected to the same position regardless of which board. On the other hand, different types of flow path forming laminates are slightly shifted to different positions, such as a tab 71 attached to the first flow path forming laminate 21 and a tab 72 attached to the second flow path forming laminate 22. Tab T is attached.

  Thus, the laminated body 20 is formed by laminating the flow path forming laminated plates with the tabs T attached thereto. If the layers are stacked in the correct order, the gathered portions of the upper sides of the tabs T form a predetermined pattern in the thickness direction (stacking direction) as shown in FIG. However, for example, when the second flow path forming laminated plate 22 is mixed and laminated where the third flow path forming laminated plate 23 should be laminated, the tab 72 is included in the pattern in which the tabs 73 are gathered. Will pop out and a predetermined pattern is not formed (FIG. 7).

  Thus, in this example, the tab T is attached to the same position if the type of the flow path forming laminate is the same, and is slightly shifted so as to be different if the type is different. Whether or not the flow path forming laminate is mixed in the wrong place can be easily confirmed when viewed from above or obliquely during or after lamination. If the order is wrong, the flow path forming laminated plates 21 to 25 can be laminated again in the correct order before being integrated. Therefore, it is possible to prevent an assembly error that the layers are integrated in the wrong order.

  In the examples of FIGS. 5 to 7, the tabs 71 to 75 are attached with different positions so as to partially overlap each other, but how to shift the positions is as shown in FIG. Can be determined as appropriate. For example, when there are fewer types of flow path forming laminates, tabs attached to different types of flow path forming laminates (for example, tab 71 and the like) may be provided even if a wider tab is provided than shown in FIG. It is possible to shift the position so that the tabs 72) have little or no overlap. Conversely, when there are more types of flow path forming laminates, the width of each tab is made narrower, or tabs are attached at positions where the overlapping portions of the tabs increase.

  Moreover, in the examples of FIGS. 5 to 7, the same type of flow path forming laminated plates are provided with tabs at the same position, but not only the types but also the positions where the tabs are attached to each individual plate. It may be different little by little. For example, the pattern shown in FIG. In this way, even when the flow channel shapes of individual plates are slightly different among the same type of flow channel forming laminates, it is possible to easily identify each type of flow channel forming laminates. There is an advantage that the stacking order can be easily confirmed. Further, regardless of the type of the flow path forming laminate, the tabs may be attached while being shifted so that the positions of the tabs of all the flat plates to be laminated are different.

  Further, the shape of each tab is not limited to this trapezoidal shape, but may be a trapezoid with a narrower width, or may be other shapes such as a triangle or a substantially semicircular shape. Since such a shape has a center and outline that coincide with each other, it can be easily discriminated when the order of stacking is wrong or when the stacking position is slightly shifted. A triangular shape or a substantially semicircular shape is advantageous when there is a large number of tabs whose positions are different because one tab can be seen at a single point when viewed from above.

  FIGS. 10-12 shows another example of a structure of the flow-path formation laminated board which comprises the inkjet head block 2 which concerns on this embodiment. In this example, the types of the flow path forming laminated plates are ignored, and the tabs T are attached at different positions at equal intervals, so the first flow path forming laminated plates 21 to 5 flow paths. Instead of the formed laminate 25, it is simply called a flat plate.

  FIG. 10 is a perspective view showing the state in which the individual flat plates P (P1,..., Pn) are stacked to form the laminated body 20A, with the individual flat plates P arranged at equal intervals. FIG. 11 is a schematic perspective view of a stacked body 20A stacked in the correct order. FIG. 12 is a top view of the stacked body 20A of FIG.

  As shown in FIG. 10, the tab T1 is attached to the flat plate P1, the tab T2 is attached to the flat plate P2, the tab T3 is attached to the flat plate P3, and the tab Tn is attached to the flat plate Pn. In this example, each tab T has an isosceles triangle shape. As shown in FIGS. 10 to 12, the vertices of the tabs T are aligned in a straight line from the vertex A of the tab Tn attached to the flat plate Pn to the vertex B of the triangle of the tab T1 attached to the flat plate P1. . That is, a tab is formed on each flat plate P so as to form a straight line AB having a predetermined inclination in the thickness direction of the stacked body 20A. In this example, since the tab is an isosceles triangle, even if the number of the flow path forming laminated plates constituting the inkjet head block 2 is as large as 250, for example, the tab is shifted to a different position for each sheet. There is an advantage that it becomes easy to identify an error in the stacking order for each sheet.

  Instead of making AB a straight line in this way, tabs may be attached so that AB becomes a continuous curve as shown in FIG. Even in this case, if the stacking order is wrong, it can be easily determined.

  As described above, the tab attached to the flow path forming laminated plate has a function as a mark for making it easy to visually or optically check whether or not the respective plates are correctly laminated in a predetermined order. It also has a function as a marker for confirming the presence or absence of positional deviation. Since such a tab is a convex portion, it can be cut and deleted after having finished its role as a marker.

  Moreover, as a label | marker for making it easy to confirm the order of lamination | stacking, the above tabs, ie, a convex part, may be sufficient as a recessed part. For example, as shown in FIG. 14, the marks M1, M2, M3, M4,... Can be configured so as to have a predetermined inclination or a predetermined pattern in the thickness direction. Later, it can be easily confirmed whether or not the layers are stacked in a predetermined order. Moreover, as a label | marker, as shown in FIG. 15, hole part H1, H2, H3 ... which forms the through-hole which can be seen through which inclines with respect to the thickness direction at the time of lamination | stacking may be sufficient. The shape of the sign itself may be any shape that matches the center and outline when all the signs are attached to the same position on each flat plate. If the sign has such a shape, the apex and the contour line of the sign will be arranged in sequence when the plate is attached to each flat plate at a predetermined interval in the stacking direction. I can confirm. Moreover, it becomes easy to confirm the shift | offset | difference of the relative position of flat plates.

  However, if the mark is a recess or hole, that portion cannot be cut or deleted, so that the recess remains in the inkjet head 1 as the final product. The position and shape of the sign must be such that the function of the inkjet head 1 is not hindered. For example, if it is the edge part used as the side surface of the inkjet head 1, even if it remains in a product, there will be no problem in function (not shown).

  FIGS. 16-18 shows the other example of a structure of the flow-path formation laminated board which comprises the inkjet head block 2 which concerns on this embodiment. 16-18 is the figure which looked at the laminated state from the front. In these examples, a line or a hole for confirming the relative position of each other is further formed in each tab satisfying the above conditions.

  In the example shown in FIG. 16, lines La1, La2, and La3 in the X-axis direction in the drawing are formed by half etching or the like in the center portions of the tabs Ta1, Ta2, and Ta3, respectively. As shown in the figure, the lines La1, La2, and La3 are aligned in a straight line when the plates are stacked without relative displacement in the Y-axis direction. When the plates are stacked with their positions shifted relative to each other in the Y-axis direction, the lines La1, La2, and La3 are not aligned in a straight line, but are shifted in the Y-axis direction. Therefore, the relative positioning accuracy of each plate in the Y-axis direction can be confirmed more accurately and easily by observing the relative displacement in the Y-axis direction of the lines La1, La2, and La3.

  In the example shown in FIG. 17, in addition to the tab Ta (Ta1, Ta2, Ta3) shown in FIG. 16, tabs Tb (Tb1, Tb2, Tb3) are also attached to the left side of the drawing. Lines Lb1, Lb2, and Lb3 in the Y-axis direction in the drawing are formed by half-etching or the like in the center portions of the tabs Tb1, Tb2, and Tb3, respectively. Since such a tab is formed, it becomes easy to confirm the relative positioning accuracy in both the X-axis and Y-axis directions more accurately.

  In FIG. 17, tabs are provided on two sides (edges) sandwiching the same corner (right angle) of each flat plate. However, two sides of each flat plate that are orthogonal to each other even if the same corner is not sandwiched. By providing a tab on the (edge), it is possible to confirm the positional deviation in both the X-axis and Y-axis directions.

  In addition, when the outer shape of each flat plate has a more complicated shape and there are no two sides perpendicular to each other, tabs with lines and holes on the two non-parallel sides constituting the outer shape of each flat plate It is possible to obtain the same effect by forming.

  In addition, the tabs may be attached to the three sides instead of the two sides. In that case, effects such as easy confirmation of relative positional accuracy when the outer dimensions of the respective flat plates are not the same can be obtained.

  In the example shown in FIG. 18, through holes Ha11, Ha2, Ha3 are formed by laser beams or the like in the central portions of the tabs Ta1, Ta2, Ta3, respectively. This example is effective when there are a plurality of flat plates with tabs Ta1, Ta2, and Ta3 (for example, when tabs are attached at the same position for each type of flat plate as shown in FIG. 5). When such tabs are attached, the through holes Ha11, Ha2, and Ha3 can be seen through as long as the flat plates that should be overlapped at the same position overlap each other. Therefore, it can be easily confirmed whether or not each flat plate is laminated without being displaced in the XY direction. In addition, it becomes easy to measure and confirm how much the position is shifted.

  As shown in the examples of the tabs shown in FIGS. 16 to 18, when a label for confirming the relative positional deviation between the flat plates is attached, not only when the flat plates are laminated but before the integration after the lamination. Even after the integration, the relative positioning accuracy of each flat plate can be confirmed more accurately and easily than in the past. Conventionally, when measuring the relative positioning accuracy of each plate after integration, the accuracy is measured on the basis of the outer shape, or the measurement is performed by cutting a member.

  In the examples shown in FIGS. 16 to 18, each tab is trapezoidal. However, even if it is triangular or semicircular, a line or hole for confirming such positioning accuracy is provided. Of course, it can be done (not shown). Note that the positioning accuracy may be measured and confirmed based on the arrangement of vertices and outlines of the shapes of tabs (convex portions) and concave portions themselves, such as a triangular shape or a semicircular shape.

  As described above, according to one embodiment of the present invention, tabs or the like that form a predetermined contour in the thickness direction at the time of stacking are attached to the edges of a plurality of flat plates. You can immediately notice. Moreover, even if a mistake is made, it is easy to re-stack in a predetermined order by checking before integration (before joining).

  Further, according to one embodiment of the present invention, the tabs having a predetermined contour in the thickness direction at the time of stacking are attached to the edges of the plurality of flat plates, so that positioning accuracy can be easily measured and confirmed. Further, by providing linear or hole marks on these tabs, positioning accuracy can be measured and confirmed more accurately and easily.

  Further, according to one embodiment of the present invention, since the concave portions or the convex portions that form straight lines or curves that are inclined with respect to the thickness direction at the time of stacking are attached to the edges of the plurality of flat plates, If you make a mistake, you can immediately notice. Moreover, even if a mistake is made, it is easy to re-stack in a predetermined order by checking before integration (before joining).

  In the above description, the label is directly attached to the upper part of each flow path forming laminate constituting the inkjet 1 of the final product. However, the present invention is not limited to this.

  For example, the position where these marks are attached is not limited to the upper part, and may be any edge. However, if a mark is attached to the edge of the surface to be joined to the orifice plate 3, it is not preferable because it must be cut and deleted before joining to the orifice plate 3.

  Further, for example, as shown in FIG. 19, waste materials 81 and 82 that are unnecessary for the inkjet 1 are provided as upper and lower portions of the flow path forming laminated plate as part of individual flat plates to be laminated. Markers may be provided on the edges of the discarded materials 81 and 82. By doing so, it becomes possible to provide a mark that becomes a convex portion or a concave portion at any edge portion without being conscious of the shape of the flow path. Further, by providing the discarding materials 81 and 82, it is not necessary to directly touch the flow path forming laminated plate that is the final product of each flat plate at the time of lamination, so that it is possible to avoid damaging each flow path forming laminated plate. Is obtained. Finally, when the discarded materials 81 and 82 are cut and deleted, the outer shape of the ink jet 1 is as shown in FIG.

  Further, it is preferable to cut and delete the convex-shaped marks such as tabs directly attached to the individual flow path forming laminates, but they should be at positions where there is no problem in terms of the function of the inkjet head 1 and appearance. For example, it is not necessary to cut and delete. In that case, the outer shape of the inkjet 1 is slightly different from that shown in FIG. If there is no plan to cut or delete from the beginning, it is necessary to make a cut by half-etching etc. at the boundary with the tab (base of the tab) when forming each flow path forming laminate There is no.

  In addition, this invention is not limited only to the said embodiment. In particular, it should not be understood that the present invention is limited to the illustrated form. The above-described embodiments can be variously modified or combined without departing from the spirit of the present invention.

1 is a diagram illustrating an overall schematic configuration of an inkjet head according to an embodiment of the present invention. The figure which shows the structure of the upper surface of the inkjet head of FIG. The figure which shows the structure of the bottom face of the inkjet head of FIG. The figure which decomposes | disassembles and shows the structure of the inkjet head of FIG. The perspective view which shows a mode that the flow-path formation laminated board which attached the tab differently for every kind was attached | subjected. FIG. 5 is a plan view schematically showing a state in which the laminated plates in FIG. 5 are laminated in a predetermined order as viewed from above (hatching is an emphasis on a state in which the upper sides of trapezoidal tabs are arranged, Hereinafter, the same applies to FIGS. The top view which looked at the state by which a part of each laminated board of FIG. 5 was laminated | stacked in the incorrect order from the side to which the tab was attached | subjected. The example of the top view which shows typically the state which looked at what laminated | stacked what changed the way of making tab positions different from FIG. 5 from the upper side. The top view which shows the example laminated | stacked by attaching a tab, changing the position for every sheet, maintaining the unity for every kind. The perspective view which shows a mode that the flat plate which attached the tab differently for every sheet and which attached | subjected the tab is laminated | stacked. The figure which shows typically the state by which the flat plate shown in FIG. 10 was laminated | stacked. The top view which shows typically the state which looked at what is shown in FIG. 11 from the upper surface. The top view which shows typically the state seen from the upper surface by laminating | stacking what changed the way of making a tab position different from FIG. The figure which shows the example which laminated | stacked the flat plate which attached | subjected the recessed part which forms the straight line which inclines with respect to the thickness direction at the time of lamination | stacking. The figure which shows the example which laminated | stacked the flat plate which attached | subjected the hole part which forms the communication hole which can be seen through which inclines with respect to the thickness direction at the time of lamination | stacking. The figure which shows the example which laminated | stacked the flat plate which attached | subjected the tab which formed the horizontal line | wire in the center part. The figure which shows the example which attached | subjected the same tab as FIG. 14 to two sides which mutually orthogonally cross each flat plate, and laminated | stacked each flat plate. The figure which shows the example which laminated | stacked the flat plate which attached | subjected the tab which formed the through-hole. The figure which shows the example which formed the flat plate which provided the discard material on the upper and lower sides of the flow-path formation laminated board.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Inkjet head, 2 ... Inkjet head block, 3 ... Orifice plate, 4 ... Vibration plate (foil), 5 ... FPC (flexible substrate), 6 ... Piezoelectric element, P ... Flat plate, T ... Tab.

Claims (7)

In an inkjet head formed by laminating a plurality of flat plates,
A visual indicator or an optical indicator that forms a predetermined pattern in the thickness direction at the time of lamination is attached to an edge that becomes a discarded material after lamination of the plurality of flat plates or an edge that does not become a surface on which ink ejection holes are formed after lamination. An inkjet head characterized by that. In an inkjet head formed by laminating a plurality of flat plates,
A tab that forms a predetermined inclined contour line in the thickness direction at the time of lamination is attached to an edge that is a discarded material after lamination of the plurality of flat plates or an edge that does not become a surface on which ink ejection holes are formed after lamination. An inkjet head characterized by the above. In an inkjet head formed by laminating a plurality of flat plates,
A concave portion or a convex portion that forms a straight line or a curved line that is inclined with respect to the thickness direction at the time of lamination on an edge portion that becomes a discarded material after lamination of the plurality of flat plates or an edge portion that does not become a surface on which ink ejection holes are formed after lamination. An ink jet head characterized by comprising: In an inkjet head formed by laminating a plurality of flat plates,
A hole portion that forms a see-through communication hole that is inclined with respect to the thickness direction at the time of lamination at an edge portion that becomes a discarded material after lamination of the plurality of flat plates or an edge portion that does not become a surface on which ink ejection holes are formed after lamination. An ink jet head characterized by comprising: In the method of manufacturing an inkjet head formed by laminating a plurality of flat plates,
A flat plate constituting at least an adjacent flat plate or a different member so as to form a predetermined pattern in the thickness direction at the time of stacking on an edge portion that becomes a discarded material after stacking of each flat plate or an edge portion that does not become a surface on which ink discharge holes are formed after stacking. And changing the position to form a plurality of flat plates constituting the inkjet head with a visual marker or an optical marker, and
A laminating step of laminating the flat plates in a predetermined order;
An integration step of integrating the flat plates laminated in the predetermined order;
A method of manufacturing an ink jet head, comprising: 6. The method of manufacturing an ink-jet head according to claim 5, further comprising a step of confirming a relative positioning accuracy of each flat plate using the marker at least before the integration step. When the marked part is a discarding material, or when the sign is a convex part, after the integration step, the discarding member with the mark or the convex part serving as the mark The method for manufacturing an ink jet head according to claim 5, further comprising a step of cutting and removing the portion.

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