阅读说明：本技术 压电喷墨头内循环结构及喷墨打印机 (Internal circulation structure of piezoelectric ink jet head and ink jet printer ) 是由 胡兆斌 于 2021-01-07 设计创作，主要内容包括：本发明揭示了一种压电喷墨头内循环结构及喷墨打印机。所述压电喷墨头内循环结构包括供墨接口盒,其具有墨水流入通道和墨水流出通道,并且所述供墨接口盒的一端面还与喷嘴膜配合形成第二墨腔；盖板,其设置在供墨接口盒与压电陶瓷板之间,并具有与所述墨水流入通道连通的进墨槽,且所述盖板与喷嘴膜配合的一端面上还形成有多个第一导流槽；压电陶瓷板,其具有多个第二导流槽,且所述压电陶瓷板一端面与喷嘴膜配合；喷嘴膜,其具有多个喷孔,所述喷孔经相应的第二导流槽与进墨槽连通。本发明提供的压电喷墨头内循环结构,使墨水保持一定速度在喷墨头内一直保持流动,从而避免了墨水的沉淀。(The invention discloses an internal circulation structure of a piezoelectric ink jet head and an ink jet printer. The internal circulation structure of the piezoelectric ink-jet head comprises an ink supply interface box, a first ink cavity and a second ink cavity, wherein the ink supply interface box is provided with an ink inflow channel and an ink outflow channel, and one end surface of the ink supply interface box is matched with a nozzle film to form a second ink cavity; the cover plate is arranged between the ink supply interface box and the piezoelectric ceramic plate and is provided with an ink inlet groove communicated with the ink inflow channel, and a plurality of first flow guide grooves are formed in one end face, matched with the nozzle film, of the cover plate; the piezoelectric ceramic plate is provided with a plurality of second diversion trenches, and one end face of the piezoelectric ceramic plate is matched with the nozzle film; and the nozzle film is provided with a plurality of jet holes, and the jet holes are communicated with the ink inlet groove through corresponding second diversion grooves. The internal circulation structure of the piezoelectric ink-jet head provided by the invention enables ink to keep flowing in the ink-jet head all the time at a certain speed, thereby avoiding the precipitation of the ink.)

1. An internal circulation structure of a piezoelectric ink-jet head, characterized by comprising:

the ink supply interface box (1) is provided with an ink inflow channel (12) and an ink outflow channel (14), and one end face of the ink supply interface box (1) is matched with the nozzle film (4) to form a second ink cavity;

the cover plate (2) is arranged between the ink supply interface box (1) and the piezoelectric ceramic plate (3) and is provided with an ink inlet groove (21) communicated with the ink inflow channel (12), and a plurality of first flow guide grooves (22) are formed on one end face, matched with the nozzle film (4), of the cover plate (2);

a piezoelectric ceramic plate (3) having a plurality of second channels (31), and an end surface of the piezoelectric ceramic plate (3) is fitted with the nozzle film (4);

a nozzle film (4) having a plurality of nozzle holes (41), the nozzle holes (41) communicating with the ink inlet grooves (21) via the corresponding second guide grooves (31);

the ink circulation device comprises an ink inflow channel (12), an ink inlet groove (21), a plurality of second guide grooves (31) and a plurality of jet holes (41) which are sequentially communicated to form an ink jet working channel, the jet holes (41), the first guide grooves (22), a second ink cavity and an ink outflow channel (14) are also sequentially communicated to form an ink return working channel, and the ink inflow channel (12) and the ink outflow channel (14) are also communicated with an ink circulation device.

2. An internal circulation structure of a piezoelectric ink-jet head according to claim 1, wherein: the ink supply interface box (1) is internally provided with a first ink cavity (11), and the ink inflow channel (12) is communicated with the ink inlet groove (21) through the first ink cavity (11).

3. An internal circulation structure of a piezoelectric ink-jet head according to claim 1, wherein: the second guide grooves (31) are arranged in parallel on one side surface of the piezoelectric ceramic plate (3) matched with the cover plate (2).

4. A piezoelectric ink jet head internal circulation structure according to claim 3, wherein: the first guide grooves (22) are distributed on one end face, matched with the nozzle film (4), of the cover plate (2) in parallel.

5. The internal circulation structure of a piezoelectric ink-jet head according to claim 4, wherein: the first guide groove (22) and the second guide groove (31) are perpendicular to each other.

6. An internal circulation structure of a piezoelectric ink-jet head according to claim 1, wherein: the ink circulating device is arranged outside the internal circulating structure of the piezoelectric ink-jet head.

7. An internal circulation structure of a piezoelectric ink-jet head according to claim 1, wherein: an ink inlet and an ink outlet are distributed on the other end face, far away from the nozzle membrane (4), of the ink supply interface box (1), and the ink inlet and the ink outlet are respectively communicated with the ink inflow channel (12) and the ink outflow channel (14).

8. An internal circulation structure of a piezoelectric ink-jet head according to claim 1, wherein: a groove structure (13) is formed on one end face of the ink supply interface box (1), and the groove structure (13) is in sealing fit with the nozzle film (4) to form a second ink cavity.

9. An ink jet printer comprising the piezoelectric ink jet head internal circulation structure according to any one of claims 1 to 8.

Technical Field

The invention belongs to the technical field of ink-jet printing, and particularly relates to an internal circulation structure of a piezoelectric ink-jet head and an ink-jet printer.

Background

With the progress of ink jet technology, ink jet technology is no longer applied to the traditional printing market, but more recently, it is applied to the process technology of flat panel display and semiconductor industry, however, in order to reduce cost and save process time, a new ink jet technology is sought, and the most widely applied technology is piezoelectric ink jet technology.

Referring to fig. 1, an exploded view of a conventional piezoelectric inkjet head is shown, which comprises a piezoelectric ceramic plate 101, a cover plate 102, a nozzle membrane 103 and an ink supply interface box 104, wherein ink enters an ink inlet 1021 in the middle of the cover plate 102 from the ink supply interface box 104, flows into a flow guide channel 1011 of the piezoelectric ceramic plate 101 to reach an orifice 1031 on the nozzle membrane 103, and when not ejecting ink, the ink in the inkjet head is static and is ejected from the nozzle membrane 103 as required. For inks that can produce deposits, a longer period of rest can cause deposits inside the inkjet head, clogging the head, which will not be reversible for a longer period of time.

Disclosure of Invention

The invention mainly aims to provide an internal circulation structure of a piezoelectric ink jet head and an ink jet printer, so as to overcome the defects in the prior art.

In order to achieve the above object, the embodiment of the present invention adopts a technical solution comprising:

an embodiment of the present invention provides an internal circulation structure of a piezoelectric inkjet head, including:

the ink supply interface box is provided with an ink inflow channel and an ink outflow channel, and one end face of the ink supply interface box is matched with the nozzle film to form a second ink cavity;

the cover plate is arranged between the ink supply interface box and the piezoelectric ceramic plate and is provided with an ink inlet groove communicated with the ink inflow channel, and a plurality of first flow guide grooves are formed in one end face, matched with the nozzle film, of the cover plate;

the piezoelectric ceramic plate is provided with a plurality of second diversion trenches, and one end face of the piezoelectric ceramic plate is matched with the nozzle film;

the nozzle film is provided with a plurality of jet holes, and the jet holes are communicated with the ink inlet groove through corresponding second diversion grooves;

the ink inlet channel, the ink inlet groove, the second guide grooves and the jet holes are sequentially communicated to form an ink jet working channel, the jet holes, the first guide grooves, the second ink cavity and the ink outlet channel are also sequentially communicated to form an ink return working channel, and the ink inlet channel and the ink outlet channel are further communicated with the ink circulating device.

Furthermore, a first ink cavity is arranged in the ink supply interface box, and the ink inflow channel is communicated with the ink inlet groove through the first ink cavity.

Furthermore, the first diversion trench and the second diversion trench are arranged perpendicular to each other.

Furthermore, a groove structure is formed on one end face of the ink supply interface box, and the groove structure and the nozzle film are in sealing fit to form a second ink cavity.

The embodiment of the invention also provides an ink-jet printer which comprises the internal circulation structure of the piezoelectric ink-jet head.

Compared with the prior art, the invention has the following beneficial effects:

the internal circulation structure of the piezoelectric ink gun of the invention does not influence the working principle of the existing ink gun, solves the problem of sedimentation of ink in the ink gun, and simultaneously brings other benefits for improving ink jet, the past ink is static in the ink gun, can generate bubbles when in use, and can influence the continuous ink jet of the ink gun, so that the ink gun can continue to work normally only by cleaning the ink gun at intervals, and now, because the ink flows, if bubbles are brought out by the flowing ink in the ink gun, the cleaning interval time is effectively prolonged; in addition, some inks need to be heated to above room temperature for the purpose of achieving constant temperature, and such circulation also helps to establish and control the constant temperature system.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is an exploded view of components of a piezoelectric type ink jet head in the background of the present application.

FIG. 2 is a schematic structural diagram of an internal circulation structure of a piezoelectric inkjet head according to an embodiment of the present disclosure.

FIG. 3 is an exploded view of components of an internal circulation structure of a piezoelectric inkjet head according to an embodiment of the present application.

Fig. 4 is a diagram of a positional relationship between the first guide grooves and the second guide grooves according to an embodiment of the present disclosure.

Description of reference numerals: 101. the ink jet head comprises a piezoelectric ceramic plate 1011, a flow guide groove 102, a cover plate 1021, an ink inlet groove 103, a nozzle membrane 1031, an orifice 104 and an ink supply interface box; 1. the ink supply interface box comprises an ink supply interface box 11, a first ink cavity 12, an ink inflow channel 13, a groove structure 14, an ink outflow channel 2, a cover plate 21, an ink inlet groove 22, a first diversion groove 3, a piezoelectric ceramic plate 31, a second diversion groove 4, a nozzle membrane 41 and a jet hole.

Detailed Description

The present invention will be more fully understood from the following detailed description, which should be read in conjunction with the accompanying drawings. Detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which can be embodied in various forms. Therefore, specific functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed embodiment.

In view of the fact that the piezoelectric ink jet head in the prior art uses ink which can generate sediment, the sediment can be generated in the ink jet head after long-time standing, the ink jet head can be blocked, and the blockage can not be reversible after a long time; the inventor of the present invention has made a long-term study and provides an internal circulation structure of a piezoelectric inkjet head and an inkjet printer, which allow ink to flow in the inkjet head, and the ink always flows in one direction at a certain speed regardless of whether ink is ejected or not, thereby preventing the ink from settling in the inkjet head and protecting the inkjet head.

The technical solution, its implementation and principles, etc. will be further explained as follows.

An aspect of an embodiment of the present invention provides an internal circulation structure of a piezoelectric inkjet head, including:

the ink supply interface box is provided with an ink inflow channel and an ink outflow channel, and one end face of the ink supply interface box is matched with the nozzle film to form a second ink cavity;

the cover plate is arranged between the ink supply interface box and the piezoelectric ceramic plate and is provided with an ink inlet groove communicated with the ink inflow channel, and a plurality of first flow guide grooves are formed in one end face, matched with the nozzle film, of the cover plate;

the piezoelectric ceramic plate is provided with a plurality of second diversion trenches, and one end face of the piezoelectric ceramic plate is matched with the nozzle film;

the nozzle film is provided with a plurality of jet holes, and the jet holes are communicated with the ink inlet groove through corresponding second diversion grooves;

the ink inlet channel, the ink inlet groove, the second guide grooves and the jet holes are sequentially communicated to form an ink jet working channel, the jet holes, the first guide grooves, the second ink cavity and the ink outlet channel are also sequentially communicated to form an ink return working channel, and the ink inlet channel and the ink outlet channel are further communicated with the ink circulating device.

In some preferred embodiments, a first ink chamber is arranged in the ink supply interface box, and the ink inflow channel is communicated with the ink inlet groove through the first ink chamber.

In some preferred embodiments, the plurality of second guide grooves are arranged in parallel on a surface of the piezoelectric ceramic plate on a side where the piezoelectric ceramic plate is engaged with the cover plate.

In some preferred embodiments, the plurality of first guide grooves are distributed in parallel on an end surface of the cover plate, which is matched with the nozzle film.

In some more preferred embodiments, the first guide grooves and the second guide grooves are arranged perpendicular to each other.

In some preferred embodiments, the ink circulation device is disposed outside the circulation structure inside the piezoelectric inkjet head.

In some preferred embodiments, an ink inlet and an ink outlet are distributed on the other end face of the ink supply interface box away from the nozzle film, and the ink inlet and the ink outlet are respectively communicated with the ink inflow channel and the ink outflow channel.

In some preferred embodiments, a groove structure is formed on an end face of the ink supply interface box, and the groove structure and the nozzle film are in sealing fit to form a second ink cavity.

Compared with the existing piezoelectric ink jet head, the internal circulation structure of the piezoelectric ink jet head provided by the embodiment of the invention changes the way that the vertical diversion trench is arranged on the side, corresponding to the piezoelectric ceramic plate, of the original cover plate connected with the nozzle membrane and is vertical to the groove part on the piezoelectric ceramic plate, and an ink cavity and an ink outflow channel are additionally arranged on the ink supply interface box connected with the new cover plate groove to form two ink path interfaces, so that the area of the nozzle membrane is increased, the nozzle membrane covers the end of the piezoelectric ceramic plate groove and simultaneously covers the newly added cover plate groove and the newly added ink cavity of the ink supply interface box; ink enters from an original interface, enters a piezoelectric ceramic groove through a groove on the cover plate, passes through a nozzle film, flows through a nozzle hole, turns 90 degrees, enters a newly-added groove of the cover plate, is converged into a newly-added ink cavity of the ink supply interface box, and finally flows out from a newly-added ink outlet interface channel; an external ink circulating device is added to keep the ink flowing at a certain speed at the ink gun, thereby avoiding the sedimentation of the ink. In the structure, the ink path and the ink cavity in the whole ink gun are filled with ink (liquid), so that the volume of the ink gun is larger than that of an actuator cavity formed by piezoelectric ceramics, and the principle that the ink is extruded from the nozzle is not changed when the actuator acts according to the principle that the liquid is slightly deformed under certain pressure. Meanwhile, although the ink flows, the flowing speed is only 7m/min, and the ink is squeezed to enable the ink drop generation speed to be 7m/s, which is 60 times greater, so that the ink is ignored and is not influenced.

Another aspect of the embodiments of the present invention further provides an inkjet printer, including the internal circulation structure of the piezoelectric inkjet head.

Examples

Referring to fig. 2 and 3, an embodiment of the present invention provides an internal circulation structure of a piezoelectric inkjet head, including an ink supply interface case 1, a cover plate 2, a piezoelectric ceramic plate 3, and a nozzle film 4.

The ink supply interface box 1 is provided with an ink inflow channel 12 and an ink outflow channel 14, a groove structure 13 is formed on one end face of the ink supply interface box 1, the groove structure 13 is in sealing fit with the nozzle film 4 to form a second ink cavity, an ink inlet and an ink outlet are distributed on the other end face of the ink supply interface box 1 away from the nozzle film 4, and the ink inlet and the ink outlet are respectively communicated with the ink inflow channel 12 and the ink outflow channel 14; the cover plate 2 is arranged between the ink supply interface box 1 and the piezoelectric ceramic plate 3, and is provided with an ink inlet groove 21 communicated with the ink inflow channel 12, a plurality of first flow guide grooves 22 are further formed on one end face, matched with the nozzle film 4, of the cover plate 2, and the plurality of first flow guide grooves 22 are distributed on one end face, matched with the nozzle film 4, of the cover plate 2 in parallel; the piezoelectric ceramic plate 3 is provided with a plurality of second guide grooves 31, the plurality of second guide grooves 31 are arranged on the surface of one side, matched with the cover plate 2, of the piezoelectric ceramic plate 3 in parallel, and one end face of the piezoelectric ceramic plate 3 is matched with the nozzle film 4; referring to fig. 4, the first guide grooves 22 are perpendicular to the second guide grooves 31.

The nozzle film 4 is provided with a plurality of jet holes 41, and the jet holes 41 are communicated with the ink inlet groove 21 through the corresponding second diversion grooves 31; the ink inflow channel 12, the ink inlet slot 21, the plurality of second guiding slots 31 and the plurality of jet holes 41 are sequentially communicated to form an ink jet working channel, the plurality of jet holes 41, the plurality of first guiding slots 22, the second ink chamber and the ink outflow channel 14 are also sequentially communicated to form an ink return working channel, the ink inflow channel 12 and the ink outflow channel 14 are further communicated with an ink circulating device, the ink circulating device is arranged outside the internal circulating structure of the piezoelectric ink jet head, the ink supply interface box 1 is internally provided with a first ink chamber 11, and the ink inflow channel 12 is communicated with the ink inlet slot 21 through the first ink chamber 11.

The embodiment of the invention also provides an ink-jet printer which comprises the internal circulation structure of the piezoelectric ink-jet head.

The working process of the internal circulation structure of the piezoelectric ink-jet head of the embodiment is as follows: the ink enters the first ink cavity 11 from the ink inflow channel 12 of the ink supply interface box 1, enters the ink inlet slot 21 of the cover plate 2, enters the second diversion groove 31 of the piezoelectric ceramic plate 3, then flows into the jet orifice 41 through the nozzle membrane 4, turns 90 degrees to enter the first diversion groove 22 of the cover plate 2, converges to the second ink cavity of the ink supply interface box 1, finally flows out from the ink outflow channel 14, and keeps flowing at a certain speed in the ink gun through the ink circulating device, thereby avoiding the precipitation of the ink.

The aspects, embodiments, features and examples of the present invention should be considered as illustrative in all respects and not intended to be limiting of the invention, the scope of which is defined only by the claims. Other embodiments, modifications, and uses will be apparent to those skilled in the art without departing from the spirit and scope of the claimed invention.

The use of headings and chapters in this disclosure is not meant to limit the disclosure; each section may apply to any aspect, embodiment, or feature of the disclosure.

Throughout this specification, where a composition is described as having, containing, or comprising specific components or where a process is described as having, containing, or comprising specific process steps, it is contemplated that the composition of the present teachings also consist essentially of, or consist of, the recited components, and the process of the present teachings also consist essentially of, or consist of, the recited process steps.

Unless specifically stated otherwise, use of the terms "comprising", "including", "having" or "having" is generally to be understood as open-ended and not limiting.

It should be understood that the order of steps or the order in which particular actions are performed is not critical, so long as the teachings of the invention remain operable. Further, two or more steps or actions may be performed simultaneously.

In addition, the inventors of the present invention have also made experiments with other materials, process operations, and process conditions described in the present specification with reference to the above examples, and have obtained preferable results.

While the invention has been described with reference to illustrative embodiments, it will be understood by those skilled in the art that various other changes, omissions and/or additions may be made and substantial equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims. Moreover, unless specifically stated any use of the terms first, second, etc. do not denote any order or importance, but rather the terms first, second, etc. are used to distinguish one element from another.