JPS58189385A - Manufacture of metallic plate having very small pore - Google Patents

Abstract

PURPOSE:To make mass production of a metallic plate having very small pores with good accuracy, by disposing and fixing wire rods for forming the very small pores on a base plate of a dissimilar metal, electroforming a metallic ingot thereon, cutting the same in the direction at a right angle to the wire rods to form a plate-like material and melting away the wire rods. CONSTITUTION:A prescribed number of phosphor bronze wires 13 having the same outside diameter as the bore of the nozzle holes of a nozzle plate are arranged at a prescribed pitch on a stainless steel base plate 11, and are stuck by means of a plastic adhesive agent 14, thereby forming a material 10 to be electrodeposited. Said material 10 is put in an electrolytic cell, where an electroformed ingot 31 of Ni is deposited on the plate 11 and the wires 13 by electrodeposition. After the same is rinsed and dried, the material is cut to a rectangular parallel piped 32 which is further cut to a prescribed thickness (t) by machining in the direction at a right angle to the wires 13 by electrospark machining for wire cutting or the like to form a rectangular parallelepiped thereby forming a member 1a for nozzle plate. Such member 1a is subjected to finishing and is then immersed for about 10-30min at about 20-25 deg.C in a chemical polishing material of a copper alloy contg. hydrogen peroxide, to dissolve away the wires 13 and to form the pores, whereby the desired nozzle plate is produced.

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a method for manufacturing a metal plate having a plurality of microscopic holes, and particularly in the case of having a large number of microscopic holes, the manufacturing method is highly accurate and suitable for mass production. Regarding the provision of

('b) Conventional technology and problems Recently, inkjet printers, especially drop-on-demand type inkjet printers, have been actively developed as one of the silent printers. It is put to practical use.

For example, the Kono type inkjet head has a diameter of 0.0
Generally, a thin metal plate in which a number of holes of about 5 mm and depth of 0.2 mm are arranged at regular intervals is fixed to the ink ejection section and used as an ink nozzle plate.

Conventionally, the methods for machining the above-mentioned microholes include electrical discharge machining,
Examples include the micro-drill method and the laser beam method.

In the electrical discharge machining method, the fine metal wire used for the discharge electrode is easily bent and it is difficult to maintain it stably, so there is a lot of buffing in one dimension, and the inside surface of the hole is rough, making it difficult to mass-produce.

In the micro-drill method, the irradiated part of the hole having a small diameter is melted and processed, so there are many irregularities on the surface inside the hole, and the cross-sectional shape of the hole tends to be irregular. Each of the microhole machining methods had its own shortcomings, especially in terms of accuracy and mass production.

(・) Purpose of the present invention was made in view of the above-mentioned points, and by forming micropores using an electroforming method, a l11! The purpose is to provide a method for sending information.

(1) (Constitution of the Invention In order to achieve the above object, the present invention provides a wire rod having a diameter of a chain wheel hole and an outer shape of 0.5 mm, held in a predetermined position on a mating substrate made of a material different from that of the wire rod. The wire rod and metal substrate are fixed in place, electroformed together using the electrode method, the electroformed metal block is cut in a direction perpendicular to the wire rod to form a plate of a certain thickness, and then the metal plate is cut. The metal plate is characterized in that a desired microhole is formed in the metal plate by removing the wire inside the metal plate.

(θ) Preferred embodiments of the invention will now be described with reference to the drawings.

Figure 1 shows the ink nozzle plate l of the inkjet head.
This is a perspective view conceptually showing an example of the nozzle plate, in which a near number of holes 3 having an inner diameter d are arranged in a row at a pitch p in a thin metal plate 2 having a thickness t. Examples of these dimensions are T,
x 0.2 m, α=0.05 pupil, p=0.4 pupil.

FIGS. 2 to 7 are conceptual schematic diagrams and perspective views illustrating the manufacturing process of a metal plate having a large number of microholes for the nozzle plate 1 according to the present invention in accordance with the process order.

First, as shown in the f# + inkstone diagram in Figure 2, stainless steel (
On the substrate 11 of Su8804), phosphor bronze wires 18't having the same external dimensions as the inner diameter d of the nozzle holes 8 of the nozzle plate 1 and the same number as the number of nozzle holes 8, and the same pitch as the pitch p of the nozzle holes 3 are placed. After arranging them, they are fixed using a synthetic resin adhesive 14 such as Araldite to form an electrodeposited object IO.

11 with only one person! Move on to the processing step. In other words, a sufficient purification treatment is required to ensure that the metal substrate 11 and the ingot 31 (see Fig. 5) melt together in a sufficiently dense manner.In the case of this embodiment, sodium hydroxide 309r,゜Sodium peroxide 309 r/'l, sodium silicate 209 r//
! .

Use W4i activator 19r,/1(7) mixture at 70°
(After degreasing for 10 minutes, the process of washing with water, acid treatment, and washing with water is performed with red nickel strike plating.

As shown in the schematic diagram of No. 31A and the perspective view of FIG.
2 and at the same time to make the thickness of the electrodeposition non-uniform, it is appropriate to set the thickness to 1 to 2 to 3 times the thickness of the ingot. The anode 24 is made of the metal to be LMed, in this case Ninogel, and is connected to the DC power supply 25.

The composition of the plating solution and the electrodeposition conditions in this example
As shown in the table.

Table 1: 81t of electroformed nickel ingots deposited on the substrate 11 by the electrodeposition described above as shown in FIG. As shown in the figure, a member 1at for the nozzle plate 1 is obtained by cutting to a thickness t by wire cut electrical discharge machining or the like.

This was finished to the specified dimensions and surface roughness by flapping processing, and then coated with a copper alloy chemical polishing agent containing hydrogen peroxide for 20 to 2 hours.
The nozzle plate 1 is completed by dipping at 5 DEG C. for 10 to 80 minutes to dissolve and remove the embedded phosphor bronze wire 18 to form a hole.

The process described above is an example of an embodiment, and the wire rod 18
The material is not limited to phosphor bronze alloy, but any material may be used as long as it is combined with the material of the metal substrate 11 so that only the wire can be chemically dissolved from the last nozzle plate member 1a. Furthermore, the phosphor bronze wire 18 may be a synthetic resin wire, for example a nylon wire. To remove the wire from the nozzle plate member 1a in this groove, it is only necessary to heat it in an electric furnace. For example, when using nylon #11, 80'D
Heating for 80 minutes is sufficient.

The method of fixing the phosphor bronze wire 13 to the metal substrate 11, which is the first step in the third embodiment, will now be described.

The method shown in FIG. 8 is to fit two metal substrates together and fit them into a small winding machine using a chuck (not shown), and rotate the machine around χ-X to wind up the phosphor bronze wire 18 at a predetermined pitch p. After that, the synthetic resin adhesive 14 is dotted and applied to the ninth position [14a]. As you can imagine from the figure, this method is excellent in mass production and can be easily expanded to a large number of pieces.
In the method shown in FIG. 9, when the precision of the pitch p of the nozzle holes 8 is strictly required, guide grooves 42 with a pitch p are provided at both ends of the jig 41 with high precision, and the phosphor bronze wire 18 is The metal substrate 11 is inserted into the space A between this wire and the jig 41, and the phosphor bronze wire 113ft is fixed to the metal substrate 11 with an adhesive 14, and then separated from the jig 41. Therefore, in this case, the jig can be used repeatedly.

When the nozzle holes 8 of the nozzle plate 1 are arranged in two rows, the thickness of the metal substrate 11 is the same as the dimension between both hole rows,
The phosphor bronze wires 18 may be fixed to both sides of the substrate and the process described above may be followed. When the nozzle holes 8 are arranged in three rows or more, the purpose can be easily achieved by stretching the phosphor bronze wire in the space at a predetermined relative position using a jig.

In the above description, phosphor bronze St- is used as an example of the wire material, but other types of metal wires or synthetic resin wires may be used.

Up to this point, we have mainly explained the manufacturing method of the ink ejection nozzle plate of an inkjet head as an example.This article is also applicable to the manufacturing of metal plates with 5° holes that are used for other purposes. Applicable.

(↑'I + e Light effect: A metal plate with micro holes, for example, about 0.05 u omniscient +
If it is applicable to lr6 or the present invention, conventional processing i-
In addition to being able to machine high-quality micro-holes with smooth inner surfaces with much higher precision than other machines, this processing method is also extremely suitable for mass production and provides high yields. It is a young fruit that reduces the foot side.

[Brief explanation of drawings]

-Figure A1 is a perspective view showing the nozzle plate of the Ino2 discharge part in the I/Kushienotof'rinog, Figures 2 to 7
The process based on the embodiment of the invention is shown in step 11'@r'
The second figure is a perspective view of the shield part, the third figure is a schematic diagram of the 7# ridge shield, the fourth figure is a diagram showing the configuration of the cathode, and the second figure is a perspective view of the shield part. The ingot after electrodeposition is completed. Figure 6 shows the long nozzle plate cut out from the ingot after being cut. =
FIG. 7 is a perspective view showing the vJ section of the nozzle plate member. FIGS. 8 and 9 are perspective views showing a modification of the method for fixing the tA bronze all-metal board. In the figure, l is the claw plate, ia is the type 7'p plate W, material, 8 is the nozzle hole, 10 is the assembly of the shield part, 11
is a metal board, 12 is a hole for attaching to a cathode hanger, I8 is
14 is a synthetic grease-resistant fixing wire, 21 is a plating bath, 22 is a cathode hanger, 23 is an electrodeposition shielding plate, 24 is an anode made of the metal to be electrodeposited, 25 is a power source for the electrodeposition, 2
Reference numeral 6 indicates an insulating coating layer, 31 an electrodeposited ingot, 32 a rectangular parallelepiped, 41 a jig, and 42 a pitch guide groove. Figure 8 Figure 9

Claims (1)

[Claims] In the production of metal plates with small holes, f! 1. A wire rod having the same outer diameter as the inner diameter of a small hole is placed and fixed in a predetermined position on a metal substrate made of a material different from that of the wire rod, and then a metal made of a material different from the material of the wire rod is placed and fixed. The wire rod No. 611 and the metal substrate are integrated by thick electrodeposition on the substrate and the electroformed metal lump is then cut into a plate shape with a predetermined size in the direction perpendicular to the wire rod, and then by cutting. Formed metal making method.