JPS61255868A - Preparation of ink jet head for printer - Google Patents

Abstract

PURPOSE:To obtain the titled ink jet head enabling a multiple-nozzle system at low cost, by connecting a vibration plate having a UV resin layer formed to the entire surface thereof to a substrate having ink flow passages and nozzles formed of a UV resin. CONSTITUTION:A UV resin is applied to the single surface of a vibration plate 3. The vibration plate 3 is desirably formed of a metal because of high modulus of elasticity. The UV resin layer applied to the vibration plate 3 is irradiated with ultraviolet lay to perform half exposure. Further, a master having desired ink flow passages and nozzles formed thereto is prepared and a mold 7 is formed by the transfer from the master. The UV resin is poured in the mold 7 and a substrate 1 is further set onto said mold. As the substrate 1, a plastic plate or glass pervious to ultraviolet rays is used and ultraviolet rays are irradiated to perform half exposure. Next, the vibration plate having the UV resin layer 2 having received half exposure previously formed thereto is superposed to the substrate 1 having the ink flow passages and the nozzles formed of the UV resin and sufficient ultraviolet rays are allowed to irradiate the superposed one to chemically bond and cure the uncured resin layer to obtain strong connection.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing an inkjet head for a printer.

[Summary of the invention]

The present invention relates to a method for manufacturing an inkjet head for a printer, which is characterized in that a diaphragm whose entire surface is coated with a UV resin is bonded to a substrate whose ink channels and nozzles are made of a UV resin. The present invention provides an inkjet head that enables a large number of nozzles at low cost.

[Prior art]

A conventional method for manufacturing an inkjet head is a photoetching method using a 1-inch glass substrate.

The moving plate used is a glass thin piece having a thickness of α15fi, and one side of which is coated with a conductive layer.

The inkjet substrate is formed by photoetching a glass substrate to form ink channels and nozzles. First, a film of Cr and Au is formed on the entire surface of a glass plate having a thickness of 1.5 volts by sputtering.

Next, the parts that will become the ink flow path and nozzle are etched with Cr using a photoetching technique that is generally performed using photoresist.
The Au film is removed, and the exposed glass surface is etched with concentrated acid to form ink channels and nozzles.

Next, the diaphragm and the glass substrate on which the ink flow path and sizzle were formed were placed on top of each other, and the atmosphere was heated to 600C! The imaging plate and the inkjet board are bonded by applying pressure and heating at 5 air.

Next, the pressure 1 element is attached to the diaphragm side on which the Nesa film is applied, and the inkjet head is completed.

[Problems and objects to be solved by the invention] However, the above-mentioned conventional technology requires a very large number of steps, it is difficult to uniformly etch the glass, and the yield is very low. Since the glass is very thin, it breaks easily and is extremely expensive to manufacture.

Furthermore, there is a limit to how small the nozzle diameter can be made, and t1' cannot be said to be an advantageous manufacturing method for producing multiple nozzles.

Therefore, the present invention aims to solve these problems.
The objective is to provide an inkjet head for printers that enables multiple nozzles at low cost.

[Means for solving problems]

The method of manufacturing an ink transfer head for a printer according to the present invention involves bonding a diaphragm whose entire surface is made of a UV resin layer and a substrate whose ink channels and nozzles are made of UV resin. The junction of U formed in each
By half-exposure of the V resin and post-exposure with each layer overlapped, the imaging plate on which the UV resin layer is formed and the substrate on which the ink channels and nozzles are made of UV resin are chemically bonded. It is characterized by the fact that it can be joined in a specific manner.

[Effect]

Forming UV resin on the entire surface of the imaging plate can be done very easily by using a spinner coating method, a roll coater method, or the like.

To form ink Himeji and nozzles on a substrate using UV resin, a mold of the shape to be treated is created, the UV resin is poured into the mold, and ultraviolet rays are irradiated, allowing molding to be performed in a very short time.

Also, the O type can be used repeatedly.

The above facts lead to the provision of a low-cost inkjet head.

Furthermore, since the diaphragm and the inkjet head are chemically bonded using the same UV resin, the bonding surface is strong and an ideal bonding state is possible.

Furthermore, since the nozzle diameter can be made small, it is possible to use a large number of nozzles.

〔Example〕

First, UV resin is applied to one side of the imaging plate 3.

The material of the diaphragm used is metal or glass. Among them, it is preferable to use golden oysters because they have a large elastic modulus.

For example, if a stainless steel plate with a thickness of 0.15 m is used, it can sufficiently function as a photographic plate.

The U4 resin can be applied by spinner coating or roll coating.

The thickness of the UV resin layer is preferably 10μ8 degrees.

Next, the UV resin coated on the diaphragm 5 is irradiated with ultraviolet rays for half exposure, thereby producing a photographing plate on which a UV resin layer is formed as shown in FIG.

The meaning of this half exposure is to leave a portion of the UV resin unpolymerized without completely curing the UV resin.

In order to improve the adhesion between the UV resin layer and the fusion plate, the diaphragm is treated with a primer beforehand, and the UV resin and the diaphragm are one and the same! BfI will become stronger.

Next, a method for installing the inkjet head substrate will be explained.

First, the processing ink flow path and nozzle are b! Prepare an O-type 7 that can form . The method for manufacturing the O-mold 7 is to create a master in which ink channels and nozzles for processing are formed, and then transfer from the master to create the O-mold 7. As a method for transferring from the master, if the O-mold is made of metal, an electroforming method can be adopted, and if the O-mold 7 is made of resin, a casting method using silicone rubber, epoxy, etc., or a hot stamping method using a thermoplastic resin can be adopted.

Next, UV resin is poured into the prepared mold 7, and the substrate 1 is further set on top of it. Injection of the above UV resin and substrate 1
It is important to prevent air from entering when setting.

The substrate 1 can be made of a plastic plate or glass that transmits ultraviolet rays. When the imaging plate is glass/i-substrate 1 can be made of metal.

Next, ultraviolet rays are irradiated to emit -74 light.

The purpose of this half exposure is to leave a portion of the 04 resin unpolymerized without completely curing the UV resin.

Next, the UV resin on which the ink channels and nozzles are formed is peeled off from the O-type 7 to the substrate 1. Figure 4: Next, the photographing plate on which the UV resin 2 was formed and the substrate 1 on which the ink flow path and nozzle were formed with the UV resin 2, which had been half-exposed earlier, are attached to the UV resin 7). When they are overlapped and irradiated with sufficient ultraviolet rays, the unpolymerized resin layers at the overlapped interface are chemically bonded and hardened, creating a strong bond. It is important to prevent air from entering the interface during overlapping.

To achieve this, it is best to add weight from superimposition and then add light.

Finally, the pressure element 4 is adhered to the diaphragm using a conductive adhesive to complete the inkjet head of the present invention. FIG. 1 [Effects of the Invention] As described above, according to the present invention, the Uv formed on the diaphragm 3, the Uv formed on the l sealing layer 2 and the ink flow path and nozzle on the substrate 1 are molded of UV resin. #Skin+- is completely bonded chemically, so there is no need to worry about the bonded surface peeling off due to the @1 aid of the pressure forming element, and in terms of cost, the ink flow path and nozzle are cast and transferred using UV resin. It is also possible to form a large number of one-piece inkjet heads on the same substrate, that is, the imaging plate 3 and the substrate 1, and cut them after layering, so that a low-cost inkjet head for a printer can be provided.

[Brief explanation of drawings]

Figure $1 is a sectional view showing the structure of the inkjet head of the present invention. FIG. 2 is a plan view showing the ink flow path and nozzle of the inkjet head of the present invention. FIG. 3 is a sectional view showing the structure of a conventional glass inkjet head. FIG. 44 is a sectional view showing a diaphragm on which a UV resin layer is formed. Figure 5 is a cross-sectional view showing the structure of an inkjet head substrate in which UV resin is cast into an O-shape. FIG. 6 is a sectional view showing the structure of an inkjet head substrate in which an ink flow path and nozzle are formed of UV resin. TiJF-Usuzu Katsuhori

Claims (4)

[Claims] (1) A method for manufacturing an inkjet head for a printer, characterized in that a diaphragm on which a UV curable resin layer is formed on the entire surface and a substrate whose ink channels and nozzles are made of UV resin are bonded to each other. (2) In claim 1, when the diaphragm and the substrate are bonded, the UV resin formed by each is formed by half exposure, and the UV resin is post-exposed in a state where they are overlapped. A method for manufacturing an inkjet head for a printer, comprising joining a diaphragm on which a layer is formed and a substrate on which ink channels and nozzles are formed of UV resin. (3) The method of manufacturing an inkjet head for a printer according to claim 1, wherein the diaphragm and the substrate are made of metal, glass, or plastic. (4) A method of manufacturing an inkjet head for a printer according to claim 1, characterized in that two or more inkjet heads are formed on the same substrate of a diaphragm and a substrate, and the inkjet heads are cut after being joined.