JP3661350B2 - Electrostatic suction type multi-nozzle inkjet head and method for manufacturing the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a multi-nozzle inkjet head in an electrostatic suction type multi-nozzle inkjet recording apparatus and a method for manufacturing the same.
[0002]
[Prior art]
Conventionally, a print voltage is applied to each nozzle of a multi-nozzle inkjet head having a large number of nozzle holes, ink is ejected from each nozzle to the opposing back electrode, and recording passes between the nozzle and the back electrode. There is an electrostatic suction type ink jet recording apparatus that records ink by attaching it to a medium (recording paper or the like). Conventionally, a manufacturing method of a multi-nozzle ink jet head used in this recording apparatus is a mold such as phosphor bronze having a large number of small holes in a substrate layer and a large number of nozzle tip mold holes aligned with the small holes. A plating layer is formed on the plate layer, and after the template layer having the plating layer formed thereon is deposited on the substrate layer, the template layer is completely removed by etching or the like. That is, finally, a multi-nozzle inkjet head having a plating layer deposited on the substrate layer is manufactured.
[0003]
[Problems to be solved by the invention]
In the above-described conventional manufacturing method, since the template layer is removed by etching after plating, a template layer is necessary for the nozzle to be manufactured, and the nozzle tip die holes are provided in each template layer. Since it was formed by cutting, the mass production cost was high.
[0004]
[Means for Solving the Problems]
The present invention uses the following means in order to solve the above problems. First, a step of forming a mother die having a large number of convex portions, a step of depositing a base having a large number of plating liquid passage holes on the mother die, and plating the convex portions of the mother die. A method of manufacturing an electrostatic attraction type multi-nozzle ink jet head comprising a step of forming a nozzle and a step of removing the base from the matrix is employed.
[0005]
Second, in the electrostatic suction type multi-nozzle ink jet head manufactured by using the manufacturing method, the plating is electroless nickel plating.
[0006]
Thirdly, in the electrostatic attraction type multi-nozzle ink jet head manufactured by using the above manufacturing method, the convex portion of the master die gradually decreases in diameter toward the tip.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic side sectional view of a base 1 with a base 3 attached thereto, FIG. 2 is a schematic side sectional view of the base 1 in FIG. 1 plated, and FIG. FIG. 4 is a schematic side sectional view of a multi-nozzle inkjet head constructed by depositing and forming the nozzle head 5 on the substrate layer 6.
[0008]
First, as shown in FIG. 1, a large number of convex portions 1a, 1a,... The mother die 1 is made of stainless steel, resin, or the like. When it is made of stainless steel, the convex portions 1a, 1a,... Can be integrally formed by electroforming or the like. In the case of resin, the convex portions 1a, 1a,... Can be formed by laser processing or the like. Or it is good also as a structure which this convex-shaped part 1a * 1a ... of the separate body was fitted and integrated with the mother mold. In any case, since a mother die is used, it is possible to form a nozzle tip by plating a single mother die many times, leading to a reduction in mass production costs. The matrix 1 is plated with masking 2 on the surface other than the surface to be plated.
[0009]
The base 3 is made of resin or metal, and has a large number of plating solution passage holes 3a, 3a,..., And the plating mask 4 is processed on the surface as shown in FIG. The masking 4 covering surface is deposited on the tips of the convex portions 1a, 1a,. The plating solution passage holes 3a, 3a,... Are located between the convex portions 1a, 1a,.
[0010]
Thus, the integrated mother die 1 and base 3 are immersed in a plating solution such as electroless nickel so that the surface of the mother die 1 that is not subjected to the plating masking 2 is plated. Through the plating solution passage holes 3a, 3a,..., The surface of the matrix 1 that is not subjected to the plating masking 2 is sufficiently immersed in the plating solution. Thus, as shown in FIG. 2, the nozzle head 5 formed by plating is formed, and the portions adhering to the outer surfaces of the convex portions 1a, 1a are the nozzle tip portions 5a, 5a,. Will be formed.
[0011]
When the plating thickness is sufficient, the mother die 1 and the base 3 are taken out from the plating solution, the base 3 is removed, the nozzle head 5 formed by plating is peeled off from the mother die 1, and a large number of nozzle tips as shown in FIG. The nozzle head 5 forming 5a, 5a... Is obtained.
[0012]
As shown in FIG. 4, the nozzle head 5 has an ink chamber 6a and is attached to a substrate layer 6 having a plurality of nozzle holes 6b, 6b,. It is formed to constitute a multi-nozzle inkjet head. The nozzle tip portions 5a, 5a,... Of the nozzle head 5 are aligned with the nozzle holes 6b, 6b,.
[0013]
【The invention's effect】
In the electrostatic attraction type multi-nozzle ink jet head, the present invention employs the manufacturing method as described above and is configured as described above to achieve the following effects. First, by using the manufacturing method as described in claim 1, a nozzle head obtained by plating is conventionally obtained by plating the mother die, and each nozzle head is manufactured as in the prior art. It is not necessary to prepare a mold plate formed by cutting a mold hole in the same, that is, since a large number of nozzle heads can be formed from the same master mold, the mass production cost can be reduced. Further, the nozzle tip can be formed by plating on the convex portion of the matrix, and the nozzle tip can be formed easily and stably.
[0014]
Further, in the multi-nozzle ink jet head obtained by such a manufacturing method, since the plating is made of electroless nickel as described in claim 2, the nozzle head to be produced is made of electroless nickel, and electrostatic suction ink jet recording. An optimum nozzle head for the apparatus can be easily provided at low cost.
[0015]
And, by making the shape of the convex portion of the matrix as described in claim 3, the nozzle tip formed by plating on the convex portion has a gradually decreasing diameter toward the tip. The shape is optimal for concentration of electric charges, and a good electrostatic attraction type ink jet recording apparatus can be provided.
[Brief description of the drawings]
FIG. 1 is a schematic side sectional view showing a state in which a base 3 is attached to a mother die 1;
FIG. 2 is a schematic side sectional view showing a state in which the mother die 1 of FIG. 1 is plated.
FIG. 3 is a schematic side sectional view of a nozzle head 5 formed by plating after removing the mother die 1 and the base 3;
FIG. 4 is a schematic side sectional view of a multi-nozzle inkjet head configured by forming a nozzle head 5 on a substrate layer 6;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Master mold 1a Convex part 2 Plating masking 3 Base 3a Plating liquid passage hole 4 Plating masking 5 Nozzle head 5a Nozzle tip part 6 Substrate layer 6a Ink chamber 6b Nozzle hole

Claims (3)

A step of forming a matrix having a large number of convex portions, a step of depositing and forming a base having a large number of plating liquid passage holes on the matrix, and a step of forming nozzles by plating the convex portions of the matrix And a step of removing the base from the mother die. The electrostatic attraction type multi-nozzle inkjet head manufactured using the manufacturing method according to claim 1, wherein the plating is electroless nickel plating. 2. The electrostatic suction type multi-nozzle head manufactured using the manufacturing method according to claim 1, wherein the convex portion of the mother die gradually decreases in diameter toward the tip. Inkjet head.

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