CN218966476U

CN218966476U - Ink supply structure of digital printing machine

Info

Publication number: CN218966476U
Application number: CN202223075086.3U
Authority: CN
Inventors: 岳婷; 周亮; 徐亿干; 袁勇康
Original assignee: Hangzhou Honghua Digital Technology Stock Co Ltd
Current assignee: Hangzhou Honghua Digital Technology Stock Co Ltd
Priority date: 2022-11-18
Filing date: 2022-11-18
Publication date: 2023-05-05
Anticipated expiration: 2032-11-18

Abstract

The utility model discloses an ink supply structure of a digital printing machine, belongs to the technical field of digital printing machines, and aims to overcome the defect that a spray head of the existing digital printing machine is prone to insufficient ink supply. The ink supply structure of the digital printing machine comprises an ink barrel and a nozzle assembly, wherein the nozzle assembly is provided with a first ink receiving port and a second ink receiving port; the ink barrel is connected with the first ink receiving port through a first pipeline, the ink barrel is connected with the second ink receiving port through a second pipeline, a shunt connecting piece is arranged on the second pipeline, an ink return pipeline is arranged between the shunt connecting piece and the ink barrel, and a switch valve is arranged on the second pipeline to open or block the second pipeline. Under the condition that the number of ink receiving ports of the spray head assembly is not changed, the double-channel ink feeding can be carried out on the spray head assembly while the ink returning function is ensured, and the phenomenon of insufficient ink supply amount in the printing process of the spray head assembly is avoided.

Description

Ink supply structure of digital printing machine

Technical Field

The utility model belongs to the technical field of digital printing machines, and relates to an ink supply structure of a digital printing machine.

Background

The Chinese patent literature discloses a printing device combining flat screen printing and digital printing, the authorized bulletin number is CN206242674, the printing device comprises a spray head and an ink supply mechanism, wherein the ink supply mechanism is connected with the spray head and used for supplying ink to the spray head, and the printing device comprises a centralized pipeline, an ink inlet joint, an ink return joint, an electromagnetic valve, an ink inlet pipe, an ink return pipe and an ink outlet pipe. During printing, ink enters the centralized pipeline from the ink inlet pipe and is sprayed out from the spray head. When the printing work is stopped, the ink in the centralized pipeline can flow back into the ink barrel from the ink return pipe, so that the air bubbles in the centralized pipeline can be conveniently discharged. The sprayer manufacturer usually integrates concentrated pipeline, solenoid valve and shower nozzle together and produces and form the shower nozzle subassembly, has two ink receiving openings on the shower nozzle subassembly, and the digital printing machine producer is when using the shower nozzle subassembly, with two ink receiving openings as ink inlet and ink return mouth respectively, and the shower nozzle subassembly can only single pass advance the china ink, and the phenomenon that the shower nozzle is insufficient for the china ink appears easily.

Disclosure of Invention

The utility model provides an ink supply structure of a digital printing machine aiming at the problems existing in the prior art, and aims to overcome the defect that the ink supply is insufficient easily caused by a spray head of the existing digital printing machine.

The utility model is realized in the following way:

the ink supply structure of the digital printing machine comprises an ink barrel and a nozzle assembly, wherein the nozzle assembly is provided with a first ink receiving port and a second ink receiving port; the ink receiving device is characterized in that the ink barrel is connected with the first ink receiving port through a first pipeline, the ink barrel is connected with the second ink receiving port through a second pipeline, a shunt connecting piece is arranged on the second pipeline, an ink return pipeline is arranged between the shunt connecting piece and the ink barrel, and a switch valve is arranged on the second pipeline to open or block the second pipeline.

When the switch valve is opened, the ink barrel supplies ink for the spray head assembly from two ink receiving ports of the spray head assembly through two paths of channels of the first pipeline and the second pipeline, so that the ink supply efficiency for the spray head assembly is improved, and the phenomenon of insufficient ink supply of the spray head is avoided. When the switch valve is closed, the ink barrel supplies ink for the spray head assembly only through the first pipeline, so that the switching of the two-way ink supply and the one-way ink supply of the spray head assembly can be realized, the flexibility is improved, and when the spray head assembly stops printing, the ink in the spray head assembly can flow back to the ink barrel through the ink return pipeline, so that bubbles in the spray head assembly can be conveniently discharged out of the spray head assembly, and the influence of the bubbles on the printing quality of the spray head assembly is avoided.

The ink barrel is connected with an ink inlet pipeline, the first pipeline is connected between the ink inlet pipeline and the first ink receiving port, the second pipeline is connected between the ink inlet pipeline and the second ink receiving port, and the ink inlet pipeline is provided with an ink supply pump, a filter, a degassing lung, an ink box and an ink inlet control valve. Before printing, the switch valve can be closed, ink flows circularly between the ink barrel and the nozzle assembly, so that the ink fully flows through the degassing lung, bubbles in the ink are reduced as much as possible, printing is performed, and printing quality is improved. The flow of ink is achieved by operation of an ink supply pump.

The shunt connecting piece comprises a first channel and a second channel which are isolated from each other, the first pipeline is connected with the first ink receiving port through the first channel, the second pipeline is communicated with the second ink receiving port through the second channel, a shunt channel is arranged on the shunt connecting piece and is communicated with the second channel, and the ink return pipeline is communicated with the shunt channel. When the spray head is assembled, the first pipeline, the second pipeline and the ink return pipeline are connected with the shunt connecting piece, and then the shunt connecting piece is inserted into the first ink receiving port and the second ink receiving port of the spray head assembly; when the spray head assembly is disassembled, the split-flow connecting piece can be pulled out from the spray head assembly to separate each pipeline from the spray head assembly, so that the spray head assembly is convenient to overhaul. In other alternatives, the first pipeline may be connected to the first ink receiving port without a shunt connector, where the shunt connector is a three-way connector for connecting the second pipeline, the ink return pipeline and the second ink receiving port.

The first ink receiving port and the second ink receiving port are respectively provided with a first connector and a second connector, and the first connector and the second connector are respectively in plug-in fit with the first channel and the second channel. Thus facilitating the disassembly and assembly of the shunt connecting piece.

The first channel and the second channel are internally provided with sealing rings to be in sealing fit with the first joint and the second joint, and the first channel and the second channel are provided with blocking pieces at openings facing the first joint and the second joint to prevent the sealing rings from being separated. Sealing washer can guarantee the leakproofness that reposition of redundant personnel connecting piece and first joint and second connect, and when the barrier can guarantee to connect the reposition of redundant personnel connecting piece and pull out from first joint and second, the sealing washer can stay in first passageway and second passageway, avoids installing the sealing washer again when installing the reposition of redundant personnel connecting piece next time, improves the dismouting efficiency of reposition of redundant personnel connecting piece.

The blocking piece is of an integrated structure and is provided with a plurality of blocking positions corresponding to a plurality of channels, and the blocking piece is clamped on the shunt connecting piece. The blocking piece of the integrated structure is more convenient to install, the workload of arranging blocking positions corresponding to a plurality of channels is reduced, the manufacturing cost is reduced, and the assembly efficiency is improved.

The shower nozzle subassembly is last to be equipped with the radiating member, the reposition of redundant personnel connecting piece is last to radiating member direction convex fixed part has, fixed part passes through the screw fixation on the radiating member. The heat dissipation piece and the shunt connection piece can be mutually restrained, and the stability of installation of the heat dissipation piece and the shunt connection piece is improved.

The shunt connection includes one, two, or more than two sets of channels, each set of channels including a first channel, a second channel, and a shunt channel. Only the branch connecting piece of a set of passageway group corresponds the monochromatic shower nozzle subassembly and uses, and the branch connecting piece that has two sets of passageway groups then corresponds the double-colored shower nozzle subassembly and uses, especially when the shower nozzle subassembly spouts the printing colour quantity more, the branch connecting piece of integrated first passageway and second passageway can show the dismouting efficiency that improves the pipeline on the shower nozzle subassembly more.

According to the ink supply structure of the digital printing machine, provided by the utility model, the ink return function is ensured under the condition that the number of ink receiving ports of the spray head assembly is not changed, and meanwhile, the spray head assembly can be subjected to double-path ink feeding, so that the phenomenon of insufficient ink supply in the printing process of the spray head assembly is avoided.

Drawings

FIG. 1 is a schematic diagram of an ink supply structure having two sets of channels;

FIG. 2 is a schematic diagram of an ink supply structure having a set of channel groups;

FIG. 3 is a schematic view of the structure of the spray head assembly, heat sink and shunt connection prior to assembly;

FIG. 4 is a schematic view of the assembled showerhead assembly, heat sink and shunt connection;

FIG. 5 is a schematic cross-sectional view of a diverter coupling;

FIG. 6 is a schematic view of a first angle configuration of the shunt connection;

FIG. 7 is a second angular schematic view of the shunt connecting piece;

the drawings are marked with the following description: 100. an ink barrel; 110. an ink return pipeline; 111. an ink return control valve; 120. an ink inlet pipeline; 121. an ink supply pump; 122. a filter; 123. deaerating the lung; 124. an ink cartridge; 125. an ink feed control valve; 200. a spray head assembly; 210. a first joint; 211. a first pipeline; 220. a second joint; 221. a second pipeline; 230. a heat sink; 300. a shunt connection; 310. a first channel; 320. a second channel; 330. a shunt channel; 340. a seal ring; 350. a blocking member; 351. a blocking bit; 360. a fixing part.

Detailed Description

The following detailed description of the embodiments of the present utility model is provided with reference to the accompanying drawings, so that the technical scheme of the present utility model can be understood and mastered more easily. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The present embodiment provides an ink supply structure of a digital printing machine, as shown in fig. 1 to 7, including an ink tank 100 and a nozzle assembly 200, wherein the nozzle assembly 200 has a first ink receiving port and a second ink receiving port; the ink barrel 100 is connected with the first ink receiving port through a first pipeline 211, the ink barrel 100 is connected with the second ink receiving port through a second pipeline 221, a shunt connecting piece 300 is arranged on the second pipeline 221, an ink return pipeline 110 is arranged between the shunt connecting piece 300 and the ink barrel 100, and a switch valve is arranged on the second pipeline 221 to open or block the second pipeline 221.

When the on-off valve is opened, the ink barrel 100 supplies ink to the nozzle assembly 200 from two ink receiving ports of the nozzle assembly 200 through two channels of the first pipeline 211 and the second pipeline 221, so that the ink supply efficiency of the ink jet assembly is improved, and the phenomenon of insufficient ink supply of the nozzle is avoided. When the switch valve is closed, the ink tank 100 supplies ink to the nozzle assembly 200 only through the first pipeline 211, so that the switching between the two-way ink supply and the one-way ink supply of the nozzle assembly 200 can be realized, the flexibility is improved, and when the nozzle assembly 200 stops printing, the ink in the nozzle assembly 200 can flow back to the ink tank 100 through the ink return pipeline 110, so that bubbles in the nozzle assembly 200 can be conveniently discharged out of the nozzle assembly 200, and the influence of the bubbles on the printing quality of the nozzle assembly 200 is avoided.

As shown in fig. 1, an ink inlet pipe 120 is connected to the ink tank 100, a first pipe 211 is connected between the ink inlet pipe 120 and the first ink receiving port, a second pipe 221 is connected between the ink inlet pipe 120 and the second ink receiving port, and an ink supply pump 121, a filter 122, a degassing lung 123, an ink cartridge 124, and an ink inlet control valve 125 are provided to the ink inlet pipe 120. The ink return pipeline 110 is provided with an ink return control valve 111, and the switch valve, the ink inlet control valve 125 and the ink return control valve 111 can be electromagnetic valves or manual valve bodies. Before printing, the on-off valve may be closed, the ink return control valve 111 and the ink inlet control valve 125 may be opened, and ink may flow between the ink tank 100 and the nozzle assembly 200 in a circulating manner, so that ink may flow through the deaeration lung 123 sufficiently, so that bubbles in the ink may be reduced as much as possible, and printing quality may be improved. The flow of ink is achieved by operation of the ink supply pump 121. When the printing works, the ink return control valve 111 is closed, the ink inlet control valve 125 is opened, the switch valve can be opened or closed, the switch valve is opened to realize double-path ink supply to the spray head assembly 200, and the switch valve is closed to realize single-path ink supply to the spray head assembly 200.

As shown in fig. 1 and 5, the shunt connecting member 300 includes a first channel 310 and a second channel 320 that are isolated from each other, the first pipeline 211 is connected with the first ink receiving port through the first channel 310, the second pipeline 221 is connected with the second ink receiving port through the second channel 320, the shunt connecting member 300 is provided with a shunt channel 330 that is connected with the second channel 320, and the ink return pipeline 110 is connected with the shunt channel 330.

The first ink receiving port and the second ink receiving port are respectively provided with a first connector 210 and a second connector 220, and the first connector 210 and the second connector 220 are respectively in plug-in fit with the first channel 310 and the second channel 320. This facilitates disassembly and assembly of the shunt connection 300. During assembly, the first pipeline 211, the second pipeline 221 and the ink return pipeline 110 are connected with the shunt connecting piece 300, and then the shunt connecting piece 300 is inserted into the first ink receiving port and the second ink receiving port of the nozzle assembly 200; when the spray head assembly 200 is disassembled, the split-flow connecting piece 300 can be pulled out from the spray head assembly 200 to separate each pipeline from the spray head assembly 200, so that the spray head assembly 200 is convenient to overhaul. In other alternatives, the first pipe 211 may be connected to the first ink receiving port without the shunt connector 300, and the shunt connector 300 is a three-way connector for connecting the second pipe 221, the ink return pipe 110 and the second ink receiving port.

As shown in fig. 5, the first and

second passages

310 and 320 are provided with sealing rings 340 to be in sealing engagement with the first and

second joints

210 and 220, and the first and

second passages

310 and 320 are provided with stoppers 350 at openings toward the first and

second joints

210 and 220 to prevent the sealing rings 340 from being separated. The sealing ring 340 can guarantee the tightness of the connection between the shunt connecting piece 300 and the first joint 210 and the second joint 220, and the blocking piece 350 can guarantee that the sealing ring 340 can stay in the first channel 310 and the second channel 320 when the shunt connecting piece 300 is pulled out from the first joint 210 and the second joint 220, so that the sealing ring 340 is prevented from being reinstalled when the shunt connecting piece 300 is installed next time, and the disassembly and assembly efficiency of the shunt connecting piece 300 is improved.

As shown in fig. 5, the blocking member 350 is an integral structure and has a plurality of blocking positions 351 corresponding to a plurality of channels, in this embodiment, four blocking positions 351 correspond to four channels, and four channels correspond to two sets of the first channel 310 and the second channel 320, and the blocking member 350 is clamped on the shunt connecting member 300. The blocking member 350 of the integrated structure is more convenient to install, reduces the workload of arranging the blocking position 351 corresponding to a plurality of channels, reduces the manufacturing cost and improves the assembly efficiency. In alternative embodiments, there may be two or more blocking bits 351 on the blocking member 350.

As shown in fig. 3 and 4, the spray head assembly 200 is provided with a heat sink 230, and the flow dividing connector 300 is provided with a fixing portion 360 protruding toward the heat sink 230, and the fixing portion 360 is fixed to the heat sink 230 by a screw. The heat sink 230 and the shunt connection 300 can be constrained to each other, and the stability of the installation of the two can be improved.

The shunt connection 300 includes one, two, or more than two sets of channels, each set including a first channel 310, a second channel 320, and a shunt channel 330. As shown in fig. 2, only one set of manifold connections 300 is used with respect to the single color showerhead assembly 200. As shown in fig. 1, the split-flow connector 300 having two sets of channels is used corresponding to the dual-color spray head assembly 200, and particularly when the number of spray colors of the spray head assembly 200 is large, the split-flow connector 300 integrating the first channel 310 and the second channel 320 can significantly improve the assembly and disassembly efficiency of the pipeline on the spray head assembly 200.

Claims

1. An ink supply structure of a digital printing machine comprises an ink barrel (100) and a spray head assembly (200), wherein the spray head assembly (200) is provided with a first ink receiving port and a second ink receiving port; the ink tank is characterized in that the ink tank (100) is connected with the first ink receiving port through a first pipeline (211), the ink tank (100) is connected with the second ink receiving port through a second pipeline (221), a shunt connecting piece (300) is arranged on the second pipeline (221), an ink return pipeline (110) is arranged between the shunt connecting piece (300) and the ink tank (100), and a switch valve is arranged on the second pipeline (221) to open or block the second pipeline (221).

2. The ink supply structure of a digital printing machine according to claim 1, wherein the ink tank (100) is connected with an ink inlet pipeline (120), the first pipeline (211) is connected between the ink inlet pipeline (120) and the first ink receiving port, the second pipeline (221) is connected between the ink inlet pipeline (120) and the second ink receiving port, and the ink inlet pipeline (120) is provided with an ink supply pump (121), a filter (122), a degassing lung (123), an ink box (124) and an ink inlet control valve (125).

3. The ink supply structure of a digital printing machine according to claim 2, wherein the shunt connecting piece (300) comprises a first channel (310) and a second channel (320) which are isolated from each other, the first pipeline (211) is connected with the first ink receiving port through the first channel (310), the second pipeline (221) is communicated with the second ink receiving port through the second channel (320), a shunt channel (330) is arranged on the shunt connecting piece (300) and is communicated with the second channel (320), and the ink return pipeline (110) is communicated with the shunt channel (330).

4. A digital printing machine ink supply structure according to claim 3, wherein the first ink receiving port and the second ink receiving port are respectively provided with a first joint (210) and a second joint (220), and the first joint (210) and the second joint (220) are respectively in plug-in fit with the first channel (310) and the second channel (320).

5. The ink supply structure of a digital printing machine according to claim 4, wherein a sealing ring (340) is disposed in the first channel (310) and the second channel (320) to be in sealing engagement with the first joint (210) and the second joint (220), and a blocking member (350) is disposed at an opening facing the first joint (210) and the second joint (220) of the first channel (310) and the second channel (320) to prevent the sealing ring (340) from being separated.

6. The ink supply structure of a digital printing machine according to claim 5, wherein the blocking member (350) is an integral structure and has a plurality of blocking positions (351) corresponding to a plurality of channels, and the blocking member (350) is clamped on the shunt connecting member (300).

7. The ink supply structure of a digital printing machine according to claim 6, wherein the nozzle assembly (200) is provided with a heat sink (230), the split-flow connector (300) is provided with a fixing portion (360) protruding toward the heat sink (230), and the fixing portion (360) is fixed on the heat sink (230) by a screw.

8. A digital printer ink supply structure according to claim 1, wherein the shunt connection (300) comprises one, two or more than two channel groups, each comprising a first channel (310), a second channel (320) and a shunt channel (330).