JPH03256A - Manufacture of ink jet head - Google Patents

Abstract

PURPOSE:To make it possible to check any abnormality in appearance generating at the tip of a nozzle exactly and in a short time by injecting liquid from an ink supply inlet, then allowing it to spew from the tip of the nozzle and determine whether the ejection direction of the liquid is correct during the premanufacturing process of an ink jet head. CONSTITUTION:The liquid injected from an ink supply inlet 1 after a nozzle hole is cut out is ejected from a nozzle 4 through a pattern formed on a substrate 2. An arrow indicates the ejected on direction of the liquid and a nozzle at the top allows the liquid to spew in a horizontal direction as it has no abnormality from a viewpoint of appearance. On the other hand, the other nozzles have a vertically bent ejection direction as they have an abnormality as viewed from externally. Thus it is possible to determine the abnormality of the nozzle correctly and also eject the liquid from all the nozzles simultaneously by checking the ejection direction as well as identify the abnormality definitely at glance.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for manufacturing an inkjet head.

[Prior Art] Conventionally, in the pre-manufacturing process of an inkjet head, an inspection for external abnormalities occurring in a nozzle part was carried out. [Problems and Objectives to be Solved by the Invention] However, in the above-mentioned conventional technology, extreme nozzle deformation, Alternatively, it is difficult to judge whether the product is good or bad, except for extreme paris that occurs at the nozzle opening.
There were problems with determining good products as defective and passing defective products to subsequent processes. Furthermore, when the number of nozzles increases, there is a problem that the number of man-hours for visual inspection increases.

An object of the present invention is to solve these problems and provide an efficient manufacturing method in a pre-manufacturing process of an inkjet head.

[Means for solving the problem] In the pre-manufacturing process of an inkjet head, as an inspection for abnormalities in appearance that occur in the nozzle part, liquid is injected from the ink supply port and ejected from the nozzle tip, and the quality of the ejecting direction of the liquid is checked. [Embodiment] In the pre-manufacturing process of an inkjet head, there is a step of attaching a diaphragm to a substrate made of glass or Branutik with a flow path formed therein by heat fusion bonding or adhesive bonding. .

After pasting them together, the nozzle part may become deformed due to heat or the adhesive may ooze out.

After pasting them together, a nozzle opening is cut out to form an ink ejection opening. In this extraction, paris may occur.

FIG. 1 shows the method according to this embodiment. According to this embodiment, after the nozzle opening is cut out, the liquid injected from the ink supply port 1 is ejected from the nozzle 4 through the pattern 3 formed on the substrate 2.

FIG. 2 shows an enlarged view of the nozzle section. The arrow indicates the direction of liquid jetting. The nozzle at the top is a nozzle with no problem in appearance, so the liquid is spouted horizontally. The other nozzles have the above-mentioned abnormality in appearance, so the ejection direction is bent up and down. Incidentally, 5 is the deformation of the nozzle due to heat fusion, 6 is the adhesive protruding from adhesive bonding, and 7 is the crack caused by cutting out the nozzle.

Conventionally, all nozzles were inspected one by one by looking through a microscope for the above-mentioned appearance abnormalities, but it was difficult to determine pass/fail for minute abnormalities, making it difficult to judge good or defective products. Good products were passed on to later processes. Furthermore, when there are a large number of nozzles, the number of man-hours required for visual inspection is extremely high.

According to this embodiment, by checking the ejection direction, it is possible to accurately determine abnormal nozzles, and it is also possible to eject liquid from all nozzles at once, so abnormal nozzles can be identified at a glance. It is.

Furthermore, by using actual ink as the liquid and making the ink ejection speed equivalent to when actually using a piezoelectric element,
It is also possible to improve the accuracy of defect detection.

[Effects of the Invention] According to the present invention, in the pre-manufacturing process of inkjet heads, it becomes possible to accurately and quickly inspect for abnormalities in appearance that occur in the nozzle portion, and it becomes possible to efficiently manufacture inkjet heads. became.

[Brief explanation of the drawing]

FIG. 1 shows a method according to the invention. FIG. 2 is an enlarged view of the nozzle section shown in FIG. 1. Ink supply port, substrate, flow path, nozzle, deformation due to thermal fusion Adhesive protrusion due to adhesive bonding, parity due to nozzle cutting 1 ・ ・ 2 ・ ・ 3 ・ 4 ・ 7 ・ ・ Figure 1 5: @ Applicant: Seiko Epson Co., Ltd. Figure 2 Representative Patent Attorney Kizobe Suzuki and 1 other person

Claims (1)

[Claims] In the pre-manufacturing process of the inkjet head, an inkjet head is characterized by injecting liquid from an ink supply port, ejecting it from the tip of the nozzle, and determining whether the ejecting direction of the liquid is good or bad as an inspection for external abnormalities occurring in the nozzle part. Head manufacturing method.