CN-224224756-U - High-speed spraying ink-jet system for continuous ink supply

Abstract

The utility model relates to a continuous ink supply high-speed spraying ink-jet system, which solves the problem that the existing various ink-jet printing systems cannot be directly applied to high-speed spraying such as large-area dyeing. The device comprises an ink jet head and a liquid pressure continuous ink supply device, wherein spray holes are formed in the ink jet head, the spray holes are uniformly arranged along a first direction, the minimum distance between the spray holes along the first direction is P, the diameter of each spray hole is D, the diameter of each spray hole meets the requirement that D 2 /P is more than 3.5 microns, the liquid pressure continuous ink supply device comprises a liquid source, a pressure source and a pressure controller, the pressure controller is connected with the pressure source and controls the output pressure of the pressure source, and the output pressure is more than 20kPa. The utility model adopts the design of combining large spray hole aperture with multiple rows of spray holes, fully utilizes the continuous ink supply device to provide stable pressure, and utilizes the large ink output of the spray holes to ensure high-speed spraying of an ink jet system in the large-area dyeing process and ensure the dyeing uniformity.

Inventors

• YANG JING
• ZHANG FAN
• HUANG ZHEGUAN
• XIE YONGLIN

Assignees

• 杭州锐尔发科技有限公司

Dates

Publication Date

20260512

Application Date

20250318

Claims (8)

1. 1. An ink-jet system for high-speed spraying with continuous ink supply is composed of ink-jet head with spray holes uniformly arranged along the first direction, liquid pressure continuous ink supply unit, and the minimum distance between spray holes along the first direction is P, and the diameter of spray hole is D and is satisfied The liquid pressure continuous ink supply device comprises a liquid source, a pressure source and a pressure controller, wherein the pressure controller is connected with the pressure source and controls the output pressure of the pressure source, and the output pressure is larger than 20kPa.
2. 2. The continuous ink supply high-speed inkjet system according to claim 1 wherein the liquid source includes a pressure inlet and a liquid outlet, the pressure source being in communication with the pressure inlet of the liquid source, the liquid outlet of the liquid source being in communication with the inkjet head, the pressure source being a pneumatic source.
3. 3. The continuous ink supply high-speed inkjet system of claim 1 wherein the pressure source includes a liquid inlet and a pressurized liquid outlet, the liquid inlet of the pressure source being in communication with the liquid source and the pressurized liquid outlet of the pressure source being in communication with the inkjet head.
4. 4. The high-speed inkjet system for continuous ink supply according to claim 3 wherein the pressure source is a liquid pump.
5. 5. The continuous ink supply high-speed spray ink jet system as claimed in claim 1, wherein the ink jet head comprises a substrate having at least one chip disposed on a surface thereof; the single chip is of a non-spliced integral structure, a plurality of spray holes are formed in the surface of the chip, at least one pressure cavity is formed in the back of the chip, and the spray holes are communicated with the at least one pressure cavity; The substrate is of a non-spliced integral structure, the surface of the substrate is provided with a runner, the back or side surface of the substrate opposite to the surface is provided with an ink inlet, the runner is communicated with the ink inlet, and the runner is communicated with the pressure cavity.
6. 6. The high-speed inkjet system for continuous ink supply according to claim 5 wherein the nozzle, the pressure chamber, and the flow path are connected to each other in a direction perpendicular to the chip surface without shielding by a solid structure.
7. 7. The ink jet system for high-speed spraying with continuous ink supply according to claim 5, wherein the spray holes are in one-to-one correspondence with the pressure chambers, the spray holes have a first symmetry center perpendicular to the chip surface, the pressure chambers corresponding to the spray holes have a second symmetry center perpendicular to the chip surface, and the first symmetry center overlaps with the second symmetry center.
8. 8. The ink jet system for high-speed spraying with continuous ink supply according to claim 5, wherein the spray holes on the single chip are arranged in n rows in a second direction perpendicular to the first direction, n is an integer greater than 1, the spray holes in the same row are at a pitch of m, and the spray holes in adjacent rows are sequentially staggered toward the same side in the first direction by a pitch of The spray holes of adjacent rows are uniformly arranged along the second direction in sequence, the row spacing is H, and the requirements are met 。

Description

High-speed spraying ink-jet system for continuous ink supply Technical Field The utility model belongs to the technical field of ink-jet printing, and particularly relates to an ink-jet system for high-speed spraying with continuous ink supply. Background Inkjet printing is a printing technique in which droplets of ink are ejected through a printhead onto a print surface to form a printed pattern. The ink-jet printing has low cost and high cost performance, and is one of the most common printing modes. The main application scenario of inkjet printing is to print graphics, and the current development direction is focused on pursuing the definition and precision of graphics, so that in order to obtain clearer and finer graphic line effects, developers are always striving to develop products with higher resolution, from 100dpi of early resolution to 1600dpi or even higher. Higher resolution requires more orifices to be designed within the same printhead size, resulting in finer orifices, and current development of inkjet printers is moving toward smaller orifice sizes and smaller single pass ink volumes. When the ink jet printing is used for high-speed spraying such as large-area textile dyeing, the extremely small color difference or coating thickness difference between adjacent color blocks is particularly obvious, and in order to improve the uniformity of spraying, the ink jet printing equipment is required to have large ink output, and the stability of each ink output is required to be higher, so that the uniformity of spraying can be ensured. The current ink-jet printer is provided with continuous ink supply and on-demand ink supply, and the current ink-jet printing head mainly comprises an on-demand piezoelectric nozzle and has the defects which cannot be overcome when being used for dyeing. The continuous ink jet printing adopts a stable pressure source for providing continuous and stable ink outlet power, and the ink outlet quantity is stable, however, the existing continuous nozzle printing head adopts a charge deflection mode to control the ink outlet of each ink point, namely a controller is arranged at the side of a spray hole, the ink outlet ink point carries static electricity, the controller attracts and deflects the ink point at the spray hole position where the ink outlet is not needed, and the ink point is led to enter a turnout for recycling, so that an additional control device is arranged at the side of the ink hole of the continuous ink jet printing head, the spray hole of the printing head can only be arranged in a single row, and once a plurality of rows of spray holes are arranged, the control of the spray holes of adjacent rows can be disordered, so that the ink outlet quantity is limited. The on-demand ink jet printing is mainly two types, one type is foam ink jet printing, high-temperature heating is utilized to generate bubbles in a pressure cavity, so that the pressure in the pressure cavity is improved, ink is extruded from spray holes, the pressure generation mode through heating foaming is not completely controllable, fine differences exist in each generation of bubbles, therefore, differences exist in ink outlet of spray holes among different spray holes at the same time, differences exist in ink outlet amount of the same spray hole at different times, and uniformity cannot be guaranteed. The second type is piezoelectric type, piezoelectric ceramic plates which can be bent and deformed by electrifying are used as pressure sources, ink in the pressure cavity is extruded through deformation of the piezoelectric ceramic plates to realize ink outlet of the spray holes, the mode also has the differences of the material and the deformation degree of the piezoelectric ceramic plates, and the mode also has the differences among different spray holes, and the multiple ink outlet of the same spray hole also has the differences. Thus, when on-demand ink jet printing is used for pattern printing, the line color is not yet apparent from the background color, but once used for large area dyeing, the ink unevenness is extremely apparent. Disclosure of utility model The utility model provides an ink jet system for high-speed spraying, which is used for continuously supplying ink, solves the problem that the conventional various ink jet printing systems cannot be directly applied to high-speed spraying such as large-area dyeing, and the like, and ensures stable and uniform ink supply by adopting a continuous ink supply pressure source. The utility model solves the technical problems by adopting the technical scheme that the high-speed spraying ink-jet system for continuously supplying ink comprises an ink-jet head and a liquid pressure continuous ink-supplying device, wherein the ink-jet head is provided with spray holes which are uniformly arranged along a first direction, the minimum distance between the spray holes along the first direction is P, the diameter of the spray holes is D, and th