JPS62234940A - Plastic ink jet printer head - Google Patents

Abstract

PURPOSE:To shorten the time and to reduce the manufacturing cost, when manufacturing a plastic ink jet printer head, by employing a supersonic welding technology for jointing component parts. CONSTITUTION:When a plastic substrate 1 and a plastic ink container 3 are supersonic-welded, an energy director 4 is provided at a jointing position so as to facilitate the conversion of supersonic energy into thermal energy. Furthermore, a positioning pin 5 and a positioning pin guide hole 6 are provided so as to prevent the shifting of parts due to the supersonic wave. A plastic substrate 2 having such a structure and the plastic ink container 3 are secured by means of a part-securing-jig 8, then a supersonic wave is applied from a supersonic welder horn through a bracket 9. Consequently, the tip section of the energy director 4 is fused by a frictional heat and cooled after the stoppage of application of supersonic wave, thus welding the substrate 2 with the ink container 3. The burrs to be produced during the welding are trapped by a flush trap 7 and do not enter into a tank.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to (2) a method for manufacturing a plastic inkjet head.

[Conventional technology]

Conventionally, for joining the plastic parts constituting the plastic inkjet printer head, there has been a technique #I in which a solvent is applied to the joint part and the plastic parts are bath-bonded.

[Problem that the invention seeks to solve]

However, with conventional zero-solvent welding, it is necessary to apply solvent to each plastic part to be welded, and the welded part must be dried after solvent application and welding. When used, depending on the welded area, Q Ink Seal 1! t, must be maintained till the end. To do this, first grind the welded part by polishing the welded part, etc. to bring out the smoothness of the bound part.

VC must be welded completely and evenly.

In this way, the conventionally used laxative acid 9I2/? lc
Not only is it time-consuming, but the drying process for the tied parts can also create bubbles and cracks in the solvent welded parts.

As a result, ink sealing properties may not be achieved.

Also, a chemical called a solvent? It is also a very dangerous job.

Therefore, in order to solve the above-mentioned problem, the *invention was made by making F& bonding possible in a short time without using chemicals such as solvents, and having ink-sealing properties at the O-junction. The purpose is to acquire bonding technology.

[Q means to solve problems]

In order to solve the above problem, the following technical means were adopted.

1) Ultrasonic waves emitted from the horn of an ultrasonic welding machine.

Plastic parts ■ Structure that allows for easy transmission of information to the joint part If there is one row, the joint part will be directly below the horn.
W4 construction, etc., where the parts come into contact with the horn evenly.

2) Joint location ■In order to facilitate melting and welding of plastic, an energy director is installed at the joint location.

3) When providing an energy director at a curved part, the energy director VC should be structured to have as large a radius of curvature as possible (R>1.5μ) in order to obtain accurate welding.

4) If the energy director is located in a place where ultrasonic energy is difficult to transmit (for example, if it is not under the horn, or if the ultrasonic wave does not hit directly above the energy director), use plastic parts. What is ultrasonic welding? Via the horn's super sound 1'? Pour directly above the Niki Rugie Director 〇.

This provides reliable ultrasonic welding. (This member will be referred to as a bracket.

5) Uneven welding occurs due to uneven contact between the plastic parts and the horn. To prevent this.

V automatically without the plastic parts and the horn touching each other
Use a self-aligning jig that provides accurate alignment.

The part that becomes the ink tank part 0 ultrasonic wave i? Hi! , the flash caused by the ultrasonic bath NVc
In order to prevent ink from penetrating into the ink tank, the WIt structure has a flash trap.

[Immediate use]

By the above means, (1) welding of the bonded portion (v) can be easily completed in a short time without using any chemicals such as solvents, and (2) sufficient ink sealability can be ensured at the ultrasonic bonded portion.

[Implementation row]

Embodiment 1 of the present invention will be explained below based on the drawings. 11
As shown in FIG. 1, there is a plastic substrate 2 having an ink channel system 1 and a plastic ink container 3 filled with printing ink. 07' The plastic substrate 1 and the plastic ink container 3 are welded together by ultrasonic waves.For this purpose, a V is applied to either the plastic or the plastic parts to facilitate the conversion of ultrasonic energy and thermal energy into IC.
Create a structure where energy director 4 is installed at a location similar to the CC branch meeting.'! In addition, a positioning bin 5 and a positioning bin guide hole 6 are provided to prevent parts from shifting due to ultrasonic waves.
A plastic substrate 2 having such a structure and a plastic ink container 3 are fixed with a parts fixing jig 8 as shown in Figure 2, and a flash trap 7 is provided. By applying ultrasonic waves from the IC, the tip of the ultrasonic welding machine horn 1 (energy director 4!7) is heated and melted due to frictional heat, and after the ultrasonic waves are stopped.

After cooling, the substrate 2 and the ink container 3 are welded together as shown in Figure 2. The burr 11 generated during welding is dragged by the flash trap 7 and does not enter the inside of the tank.

In the implementation sequence described above, two plastic parts are welded in a short time using ultrasonic waves, which greatly reduces the time required to manufacture a plastic inkjet printer head. It is now possible to have

〔Effect of the invention〕

As explained below, the present invention incorporates ultrasonic welding technology to join plastic parts, and thereby enables the production of plastic inkjet printer heads.
It is possible to significantly shorten the time, and at the same time, it is effective in reducing manufacturing costs to zero. Furthermore, since chemicals such as solvents are not used, completely hygienic IC work is possible.

[Brief explanation of drawings]

Figure 1 is a longitudinal cross-sectional view of a substrate and an ink container, which are the main parts constituting a plastic inkjet printer head according to the present invention, and an explanatory diagram of an ultrasonic welding method. Figure 2 is an enlarged view of the welded part of the ultrasonic bath M (7) according to the present invention. 1: Ink flow path 2 Niblastik if3 Niblastik ink container 4: Energy director 5: Positioning pin 6: Positioning bin guide hole 7: 7 Lash trap 8: Parts fixing jig 9 Bracket to: Ultrasonic mounting machine horn 11 : Applicant with more than 10 years of experience Seiko Epson's representative Patent attorney General 'J: Tsutomu and 1 other person Figure 1 IIZ

Claims (1)

[Claims] A plastic inkjet printer head characterized in that each plastic component constituting the plastic inkjet printer head is bonded by ultrasonic waves.