JPH0286458A - Manufacture of recording head of ink jet recording device - Google Patents

Abstract

PURPOSE:To make possible the simplification of cutting and accurate opening of fine orifices by forming and working grooves on a substrate before the simultaneous cutting of a top plate and the substrate. CONSTITUTION:There are two processes to be performed; one for sticking a substrate 15 and a top plate 17 together and the other for forming grooves 18 in an orifice and a vertical direction at a position corresponding to an orifice section 11 on the top plate 17 side surface of the substrate 15. After the above processes, the substrate 15 and the top plate 17 are cut so that these pass through the grooves in the direction of the groove 18. The open end of the orifice is formed and consequently, a desired recording head is obtained.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a recording head of an inkjet recording device that forms an image by ejecting recording liquid from a plurality of orifices onto a recording medium according to image information. The present invention relates to a manufacturing method, and particularly relates to a manufacturing method for recording that prevents ejection failure due to ink adhering to the face surface where an orifice opens.

[Conventional technology]

An inkjet recording apparatus performs recording by ejecting small droplets of recording liquid from a recording head using various energy application methods, and making the droplets adhere to a recording medium such as paper. As an energy application method for forming or ejecting such recording liquid (hereinafter referred to as ink) droplets, an electromechanical transducer such as a piezoelectric element is disposed near the ejection opening of the recording head, and an electromechanical transducer element such as a piezoelectric element is installed in the vicinity of the ejection opening of the recording head, and the ! There is an on-demand piezo system that ejects ink droplets by applying mechanical vibrations from a gas-mechanical transducer to the ink, or a heating element is installed near the ejection port, and the ink near the heating element is energized according to an external signal. There is a so-called thermal inkjet recording method in which ink droplets are ejected by vaporization.

In order to produce a recording device using these methods, for example, taking the on-demand piezo method as an example, first, a plurality of eleventh ice cubes, a plurality of pressure chambers, a plurality of ink channels,
A substrate having a single common liquid chamber formed on one side and a top plate having a plurality of electromechanical transducers corresponding to the plurality of pressure chambers are bonded together, and an orifice portion of this bonded body is bonded together. is cut to form a seven-way chair surface with a plurality of orifices.

By the way, if the area of the 7-piece surface (cut surface) where the multiple ori-swisses created by this cutting are open is large, ink tends to adhere to the 7-piece surface during recording, and the ink remains on the face surface. There is a problem in that the ejection direction of the droplets is curved, making it difficult to perform accurate recording.

Conventionally, therefore, a method has been used to reduce the surface area of the seven-cut chair by additional machining such as cutting or polishing.

[Problem to be solved by the invention]

However, in the above-mentioned method for manufacturing a device with a small chair surface area, the substrate and the top plate are pasted together and the desired orifice opening surface is formed by cutting. Since processing is performed to reduce the thickness, processing must be performed on the total thickness of the substrate and the top plate at the time of cutting, which makes processing difficult. There was a problem in that it was difficult to sufficiently increase the Furthermore, since the face surface reduction process is performed after the orifice opening is formed at a predetermined position, there is also the problem that the precision of the orifice opening that has been formed is reduced.

[Means to solve the problem]

The present invention is intended as a means to solve the above-mentioned problems.

An orifice is formed at the interface between the substrate and top plate of an inkjet recording device that forms an image by ejecting recording droplets from multiple orifices onto a recording medium according to image information. In the method for manufacturing a recording head, the steps of bonding a substrate and a top plate together, and forming a clear sound in a direction perpendicular to the direction of the orifice at a position corresponding to the orifice portion on the surface opposite to the top plate side of the substrate are all carried out. , and then cutting the substrate and top plate so as to pass through the bay in the direction of the groove to form an orifice opening end face. It is.

〔Example〕

An embodiment of the present invention will be described in detail below using the drawings.

FIG. 1 is an exploded perspective view for explaining one embodiment of the present invention.

In FIG. 1, 11 is an orifice portion for discharging recording droplets, 12 is a pressure chamber portion communicating with the orifice portion 11 and propagating pressure waves to the orifice portion 11;
Reference numeral 3 designates an ink flow path portion that communicates with the pressure chamber portion 12 and supplies ink to the pressure chamber portion 12, and numeral 14 represents a common liquid chamber portion that communicates with the plurality of ink flow path portions 13. These plurality of oriswiss parts 11. Pressure chamber section 12, ink flow path section 13. The single common liquid chamber 14 is formed on the same substrate 15 by a technique such as half etching.

Reference numeral 16 indicates an electromechanical transducer such as a plurality of piezoelectric elements, which are energy generators for forming recording droplets, and reference numeral 17 indicates an electromechanical transducer such as a plurality of piezoelectric elements, which is an energy generator for forming recording droplets, and 17 is an electromechanical transducer that is bonded or heated to a surface on which the orifice 11, pressure chamber 12, etc. of the substrate 15 are formed. This is a top plate that is tightly attached using techniques such as pressure R. The plurality of electromechanical transducers 16 are arranged on the top plate at positions corresponding to the plurality of pressure chambers 12 by adhesive or the like.

Orifice 11 of substrate 15. A groove 18 is formed in the lower part of the orifice 11 on the surface where the pressure chamber 12 and the like are not formed in a direction perpendicular to the discharge direction.

The grooves 18 are formed after the top plate 17 is brought into close contact with the top plate 17 or when processing the substrate 15 alone, either by integral molding or by a relatively simple processing technique such as 7-rice processing or grinding.

FIG. 2 shows a perspective view of the head in a state after the groove 18 is formed in the substrate 15 and the substrate 15 and the top plate 17 are brought into close contact. In FIG. 2, the shaded area 21 is a cutting and removal part, which is a part that is cut and removed by cutting or polishing with a dicing saw or the like on a surface perpendicular to the recording droplet ejection direction of the orifice part.

Fig. 3 shows the cutting and removal part 2 in Fig. 2 from the state shown in Fig. 2.
A perspective view of the head after removal by 1t-cutting or a combination of cutting and polishing is shown. Through this cutting or polishing process, a plurality of orifices 11 are opened at predetermined positions. In addition, the board 1
5, the area of the face surface where the orifices 11 are arranged in FIG. Wetting is prevented and the ejection direction of recording droplets is made uniform.

FIG. 4 is a general view of the periphery of a head equipped with a multi-ink jet recording device according to the present invention.

In the figure, reference numeral 41 denotes a multi-ink jet recording head, which is connected to an ink tank 43, which is a container for storing ink, via a supply tube 42 for supplying ink. A carriage 44 fixes the multi-ink jet recording head 41 and scans the head.

45 is a recording medium. 46 is a platen that conveys the recording medium 45.

〔Effect of the invention〕

As described above, according to the recording head manufacturing method of the present invention, grooves are formed on the substrate before simultaneously cutting the top plate and the substrate.
Because the work has been done.

Cutting is easy during simultaneous cutting, and a minute orifice can be opened with high precision.In addition, the area of the 7-cut chair surface can be reduced according to the depth of the groove in the substrate, so the face surface There is less ink wetting, which prevents deviations in the ejection direction of recording droplets, improving recording accuracy.Furthermore, if the grooves to be attached to the substrate are made by integral molding when manufacturing the substrate, the number of processing steps can be reduced. This has the effect of reducing costs.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view for explaining one embodiment of the present invention. FIG. 2 is a perspective view of the head after the substrate and top plate of the embodiment are brought into close contact. FIG. 3 is a perspective view of the head after the cutting and removal portion of the embodiment is cut. FIG. 4 is a general view of the head periphery of the embodiment. 11... Orifice part, 12... Pressure part, 13.
...Ink flow path section, 14...Common liquid chamber section, 15...
Substrate, 16... Electromechanical converter, 17... Top plate, 1
8...Groove. 21... Cutting/removal unit, 41... Multi-ink jet recording head, 42... Supply tube, 43... Ink tank, 44... Carriage, 45... Recording medium, 46... Platen . Figure 1 Agent Patent Attorney Jo Taira Yamashita Figure Figure Figure

Claims (1)

[Claims] In an inkjet recording device that forms an image by ejecting recording droplets from a plurality of orifices onto a recording medium according to image information, the interface between the substrate and the top plate is In a method of manufacturing a recording head in which an orifice is formed on the substrate, a step of bonding a substrate and a top plate is performed, and a step of bonding a substrate and a top plate, and a step of bonding a substrate and a top plate, and a step of forming an orifice in a direction perpendicular to the direction of the orifice at a position corresponding to the orifice portion on the surface opposite to the top plate side of the substrate. A recording head for an inkjet recording apparatus, characterized in that a step of forming a groove is performed, and then the substrate and the top plate are cut in the direction of the groove so as to pass through the groove to form an orifice opening end surface. Manufacturing method.