CN104943179A - Piezoelectric sprayer for 3D printing - Google Patents

Abstract

The present application discloses a piezoelectric nozzle for 3D printing, which includes a main body, the main body has a cavity with an open top, a liquid inlet is opened on the side wall of the main body, and a liquid inlet is opened on the bottom end of the main body. There is an injection port, and a piezoelectric actuator is sealed at the opening of the cavity, and the piezoelectric actuator includes a piezoelectric sheet and an upper electrode and a lower electrode formed on the upper and lower surfaces of the piezoelectric sheet. A diaphragm is also provided between the electrode and the opening of the main body, and a conductor is provided on the diaphragm, the lower electrode is electrically connected to the conductor, and the lower electrode is divided into a plurality of independent sub-electrodes. In the present invention, the lower electrode is composed of a plurality of mutually independent sub-electrodes, and the sub-electrodes are connected to the conductor through a conductive adhesive. Therefore, each sub-electrode of the lower electrode can be connected with the diaphragm, which solves the problem of precision.

Description

A piezoelectric nozzle for 3D printing

technical field

The application belongs to the field of 3D printing manufacturing technology, and in particular relates to a piezoelectric nozzle for 3D printing.

Background technique

In traditional piezoelectric nozzles, there are usually positioning deviations between the conductors on the diaphragm, the electrodes on the piezoelectric plate, and the piezoelectric cavity, which will cause the driving force of the piezoelectric film to not fully act on the diaphragm, reducing the amount of liquid sprayed , affecting the accuracy of the control.

In view of this, it is necessary to provide a novel piezoelectric nozzle for 3D printing.

Contents of the invention

The object of the present invention is to provide a piezoelectric nozzle for 3D printing to overcome the deficiencies in the prior art.

To achieve the above object, the present invention provides the following technical solutions:

The embodiment of the present application discloses a piezoelectric nozzle for 3D printing, which includes a main body, the main body has a cavity with an open top, a liquid inlet is opened on the side wall of the main body, and the bottom of the main body is The end is provided with an injection port, and a piezoelectric actuator is sealed at the opening of the cavity, and the piezoelectric actuator includes a piezoelectric sheet and an upper electrode and a lower electrode formed on the upper and lower surfaces of the piezoelectric sheet. A diaphragm is also provided between the lower electrode and the opening of the main body, a conductor is arranged on the diaphragm, the lower electrode is electrically connected to the conductor, and the lower electrode is divided into a plurality of independent sub-electrodes. electrode.

Preferably, in the above-mentioned piezoelectric nozzle for 3D printing, the piezoelectric sheet is a piezoelectric ceramic.

Preferably, in the above-mentioned piezoelectric nozzle for 3D printing, the lower electrode is divided into a plurality of identical independent sub-electrodes.

Preferably, in the above-mentioned piezoelectric nozzle for 3D printing, the shape of the conductor corresponds to the cross-sectional shape of the cavity.

Preferably, in the above-mentioned piezoelectric nozzle for 3D printing, the diaphragm is glass.

Preferably, in the above-mentioned piezoelectric nozzle for 3D printing, the edge of the opening of the main body part is recessed to form an annular slot, and the diaphragm is limited and fixed in the slot.

Preferably, in the above piezoelectric nozzle for 3D printing, the lower electrode is connected to the conductor through a conductive adhesive.

Compared with the prior art, the present invention has the advantage that the lower electrode is composed of a plurality of mutually independent sub-electrodes, and the sub-electrodes are connected to conductors through a conductive adhesive, therefore, each sub-electrode of the lower electrode can be connected with the diaphragm , to solve the problem of precision.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in this application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic structural view of a piezoelectric nozzle for 3D printing in a specific embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Referring to Fig. 1, the piezoelectric nozzle for 3D printing includes a main body 1, the main body has a cavity 11 with an open top, a liquid inlet 12 is opened on the side wall of the main body, and a liquid inlet 12 is opened at the bottom of the main body. Injection port 13, piezoelectric actuator 2 is sealed at the opening of the cavity, piezoelectric actuator includes piezoelectric sheet 21 and upper electrode 22 and lower electrode 23 formed on the upper and lower surfaces of the piezoelectric sheet, the lower electrode and the main body There is also a diaphragm 3 between the openings, and a conductor is arranged on the diaphragm, the lower electrode is electrically connected with the conductor, and the lower electrode is divided into a plurality of independent sub-electrodes. The lower electrode and the conductor are connected by a conductive adhesive.

Further, the piezoelectric sheet is a piezoelectric ceramic.

Further, the lower electrode is divided into a plurality of identical independent sub-electrodes.

Further, the shape of the conductor corresponds to the cross-sectional shape of the cavity.

Further, the diaphragm is glass.

Further, the edge of the opening of the main body is recessed to form an annular slot, and the diaphragm is limited and fixed in the slot.

The piezoelectric nozzle of the present invention has the advantages of:

The lower electrode is composed of a plurality of mutually independent sub-electrodes, and the sub-electrodes are connected to the conductor through a conductive adhesive. Therefore, each sub-electrode of the lower electrode can be connected with the diaphragm, which solves the problem of precision.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above description is only the specific implementation of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, some improvements and modifications can also be made. It should be regarded as the protection scope of this application.

Claims (7)

1. the piezo jets of a 3D printing, it is characterized in that, comprise main part, this main part has the cavity of a top end opening, the sidewall of described main part offers liquid inlet, the bottom of described main part offers jet, the opening part of described cavity is sealed with piezo-activator, described piezo-activator comprises piezoelectric patches and is formed at top electrode and the bottom electrode of described piezoelectric patches upper and lower surface, a barrier film is also provided with between the opening of described bottom electrode and described main part, described barrier film is provided with a conductor, described bottom electrode and described conductor electrically conduct, described bottom electrode is divided into multiple independently sub-electrode.

2. the piezo jets of 3D printing according to claim 1, is characterized in that: described piezoelectric patches is piezoelectric ceramics.

3. the piezo jets of 3D printing according to claim 1, is characterized in that: described bottom electrode is divided into multiple identical independently sub-electrode.

4. the piezo jets of 3D printing according to claim 1, is characterized in that: the shape of described conductor is corresponding with the cross sectional shape of described cavity.

5. the piezo jets of 3D printing according to claim 1, is characterized in that: described barrier film is glass.

6. the piezo jets of 3D printing according to claim 1, is characterized in that: the recessed draw-in groove being formed with annular in the edge of described main part opening, described barrier film is spacing to be fixed in described draw-in groove.

7. the piezo jets of 3D printing according to claim 1, be is characterized in that: connected by conductive adhesive between described bottom electrode and conductor.