JPS58118266A - Pressure pulse type ink jet recorder - Google Patents

Abstract

PURPOSE:To effectively operate pressurized ink, by adding an one-directional fluid valve 1 to a connection hole to an ink tank from the outside of a substrate. CONSTITUTION:A nozzle head, including a multinozzle, a pressure generating chamber, and an ink flow path having a hole linked to an ink tank at its terminal end and corresponding to each nozzle, is constituted by adhering a substrate thereto. An one-directional fluid valve 1 is added to a hole coupled to the ink tank from the outside of the substrate, a common ink chamber 12 is formed so as to totally cover the fluid valve 1, and the common ink chamber 12 is positioned in direct communication with the ink tank. The nozzle head may be manufactured merely by placing the substrate on top of the other, and this facilitates manufacture. The installation of a valve device enables the effective transfer of a pressure to a nozzle side at a time when ink is discharged, and allows the effective transfer of a pressure to the ink tank side at a time when ink is supplied.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to an apparatus for a secondary pulse type inkjet.

(Technical background of the invention and its problems) +E, Q pulse type inkjet development device was developed by Tokkosho;
As shown in Japanese Patent No. 3-12138, an ink discharge pressure generating chamber (this nozzle, which is a source of pressure to the ink) and an ink suction port communicating with an ink tank are connected at 1α. In other words, it is a two-way discharge system. Therefore, the pressure from the ink ejection pressure generation chamber does not only act on the ink on the nozzle side, but also acts on the ink on the ink suction port side. As the loss increases, pulsation of one ink occurs, and this pulsation is difficult to stabilize.

Even if the ink is pressurized in an attempt to eject the ink again in this state, if the pulsation of the entire ink has not disappeared, the two will interfere with each other. When the two are superimposed, the ink flying speed is extremely high, and the two act in a contradictory manner.

The ink ejection speed is significantly reduced and may even not eject at all. In addition, sufficient ink replenishment is not performed after the ink particles fly, resulting in insufficient ink supply and pressure not being transmitted effectively, which brings about the limits of printing MFIK.

(Objective of the Invention) An object of the present invention is to provide a pressure pulse type inkjet recording device that eliminates the above-mentioned drawbacks, has excellent printing speed and printing stability, and is easy to assemble.

(Summary of the Invention) The present invention comprises a nozzle head including a multi-nozzle, a pressure generating chamber, and an ink flow path whose terminal end is a communication hole with an ink tank, and an ink flow path corresponding to each nozzle, which is formed from an adhesive button of a substrate,
A unidirectional fluid valve is added from the outside of the K substrate to the communication hole with the ink tank (called an ink suction port), and a communication ink chamber is provided by covering all these fluid valves, and this common ink chamber It communicates directly with the ink tank.

(Effects of the Invention) According to the present invention, the nozzle head can be manufactured by simply stacking the substrates, so that it is very easy to manufacture the nozzle head. Also, when discharging ink using a valve device.

Pressure (positive FE) is effectively transmitted to the nozzle side, and during ink replenishment, pressure (voltage) is effectively transmitted to the ink tank side.

(Example of the invention) Next, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a sectional view of a multi-nozzle according to this embodiment.

First, ill formation will be explained. The multi-nozzle head main body has a pedestal (7), a K nozzle (6) section, an ink ejection pressure generating chamber section (8), and an ink suction port Ql) formed by etching or the like. A pressure-generating elastic body (9) that also serves as the top plate of the first button is bonded to it, and a piezoelectric element 10 is bonded to the top of the pressure-generating chamber for ink discharge, and together with the elastic body, it constitutes a bimorph 4 pressure generator. ing. A fluid valve Ill that can move fluid only from the common ink chamber 13 to the inside of the head is bonded to the ink suction port as well as each nozzle. As shown in FIG. 2, this fluid valve consists of four valves: a busy valve (3), an ink flow cutoff container Wi12), and an ink inflow valve support plate (4). These fluid valves (1) are connected to the upper plate (9) on the suction side of the inkjet head in a plane corresponding to each nozzle. In manufacturing this nozzle head, first, the substrate corresponding to the pedestal (7) button is etched to provide ink channels and the like. Next, the pressure-generating elastic body (9) in the form of a paper plate and the piezoelectric element I'lI are stacked on top of each other. Next, a fluid valve (1) is provided, and the upper lC1 common ink chamber a
Provide hot water so that it covers all fluid valves il+. Therefore, one assembly is very easy.

Next, the function of each component during ink ejection will be explained. When a printing drive voltage is applied to the piezoelectric element, the piezoelectric element 0 (1) with a bimorph structure and the elastic body (9) deform toward the pressure chamber side, and pressure is applied to the ink.On the ink suction side, this pressure is Move the valve (
3) moves to the (cloudy) position.

Therefore, ink inflow OO! Close 9. As a result, the ink flow no longer moves to the ink suction side, and the pressure is reduced to the nozzle (6
) - works effectively, the ink flow speed increases, and it freezes when 46 square prints are possible. Either the driving voltage of the EE element is removed or a voltage of opposite polarity is applied to f9, producing an ink llj pressure. As a result, it moves to the position of the valve 13) on the ink suction side, opens the ink flow path a9, and ink is sucked in the direction shown by the arrow ^J.

The cycle of ink ejection and ink suction is completed in the following manner.

As explained above, according to the present invention, the pressure ink is effectively applied and the nozzle head can be manufactured very easily. It goes without saying that this invention includes any modifications as long as these benefits are maintained.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the nozzle head of the present invention, and Figure 2 is a cross-sectional view of the nozzle head of the present invention.
FIG. 3, an exploded view showing the structure of the fluid valve, is an enlarged sectional view of the main part of FIG. 1. (1)...Fluid valve (2)...Ink flow blocking container, (3)...Valve. (4)... Ink inflow valve support plate, 15)... Ink inflow port. (6)...Nozzle section, (8)...Pressure generating chamber for ink discharge, αri...Common ink chamber.

Claims (1)

[Claims] In the Mocha Pulse multi-head, a fluid valve that operates at high speed according to changes in the driving pressure of the pressure generation chamber is provided on the ink suction side of the soil force generation chamber for ink discharge of each nozzle, and these valves are arranged side by side on the same plane. A pressure pulse type inkjet recording device characterized by being covered with a common ink chamber.