Printing device and digital printing equipment

Abstract

The utility model is suitable for the technical field of digital printing, and provides a printing device and digital printing equipment. The main ink box and the circulating ink box are arranged on the mounting frame; the nozzles are arranged at the bottom of the mounting frame; the first ink distribution pipe is arranged on the mounting frame and communicates with the main ink box, a plurality of first flow distribution openings are formed in the first ink distribution pipe at intervals in the axis direction of the first ink distribution pipe, and the first flow distribution openings communicate with the input ends of the nozzles; and the second ink distribution pipe is arranged on the mounting frame and communicates with the circulating ink box, a plurality of second flow distribution openings are formed in the second ink distribution pipe in the axis direction at intervals, and the first flow distribution openings communicate with the output ends of the nozzles. According to the printing device provided by the utility model, ink can be supplied to the plurality of nozzles simultaneously and timely, abnormal printing caused by insufficient ink supply when the number of the nozzles is increased is avoided, and the most enough space can be provided for the installation of the nozzles, the main ink box and the circulating ink box.

Description

TECHNICAL FIELD

[0001] The utility model belongs to digital printing technical field, especially relate to a printing device and digital printing equipment. BACKGROUND

[0002] The printing device in digital printing equipment is the important component for mainly printing medium ink to print work. The ink cartridge and the nozzle of the existing printing device usually adopt the direct connection mode, and the ink cartridge supplies ink to the nozzle to make the nozzle continuously spray ink on the printing medium to realize printing. However, when the width of the printing medium is large and the number of the nozzles to be connected is large, the following problems will occur: the ink cartridge directly supplies ink to the nozzle, the capacity of the ink cartridge is limited, and in the case that the number of the nozzles is increased, the ink cartridge cannot supply sufficient ink in time, which is easy to cause printing abnormal phenomenon, in addition, the ink cartridge cannot provide sufficient installation space for the multiple nozzles, which limits the number of the nozzles to be installed, thereby affecting the production and processing demand. SUMMARY

[0003] The printing device provided by the utility model aims at solving the problems that the ink cartridge cannot supply ink to the nozzles in time and in sufficient amount in the case that the number of the nozzles is increased, and the installation space between the multiple nozzles and the ink cartridge is limited.

[0004] The utility model is realized in this way, a kind of printing device, comprising:

[0005] mounting frame;

[0006] main ink cartridge and circulation ink cartridge, are located on the mounting frame;

[0007] A plurality of nozzles are arranged at the bottom of the mounting frame;

[0008] First ink distribution pipe, be located on the mounting frame and with the main ink cartridge communication, the first ink distribution pipe is spaced apart along its axial direction and is equipped with a plurality of first flow ports, a plurality of first flow ports are communicated with the input end of a plurality of nozzles;

[0009] Second ink distribution pipe, be located on the mounting frame and with the circulation ink cartridge communication, the second ink distribution pipe is spaced apart along its axial direction and is equipped with a plurality of second flow ports, a plurality of first flow ports are communicated with the output end of a plurality of nozzles.

[0010] Further, the main ink cartridge and the first ink distribution pipe are provided with a first control valve for controlling the on-off of the passage between the main ink cartridge and the first ink distribution pipe, and the circulation ink cartridge and the second ink distribution pipe are provided with a second control valve for controlling the on-off of the passage between the circulation ink cartridge and the second ink distribution pipe.

[0011] Further, the first control valve and the second control valve are pneumatic valves.

[0012] Further, the first ink distribution pipe is provided with a first exhaust valve, and the second ink distribution pipe is provided with a second exhaust valve.

[0013] Further, the main ink cartridge is communicated with the middle part of the first ink distribution pipe, and the first exhaust valve is arranged at both ends of the first ink distribution pipe.

[0014] The circulating ink cartridge is communicated with the middle part of the second ink distribution pipe, and the second exhaust valve is arranged at both ends of the second ink distribution pipe.

[0015] Further, each of the first flow distribution port and each of the second flow distribution port is provided with a third control valve.

[0016] Further, the first ink distribution pipe and the second ink distribution pipe are arranged in parallel, a plurality of the nozzles are arranged along the axis of the first ink distribution pipe or the second ink distribution pipe, and the first flow distribution port and the second flow distribution port connected to the same nozzle are arranged in a staggered manner in the axial direction of the first ink distribution pipe or the second ink distribution pipe.

[0017] Further, the distance between two adjacent first flow distribution ports is equal to the distance between two adjacent second flow distribution ports, and the first flow distribution port of the first ink distribution pipe and the second flow distribution port of the second ink distribution pipe are arranged in a staggered manner in the arrangement direction of the plurality of nozzles.

[0018] Further, the number of the first flow distribution ports is equal to the number of the second flow distribution ports, and the same end of the first ink distribution pipe and the second ink distribution pipe is arranged in a staggered manner.

[0019] The utility model further provides a digital printing equipment, including preceding printing device.

[0020] The utility model discloses an advantageous effect reached through the first ink distribution pipe is communicated with the main ink box to the input end of a plurality of nozzles, and the second ink distribution pipe is communicated with the circulating ink box to the output end of a plurality of nozzles, and the circulating ink path formed between the main ink box, the nozzle, the first ink distribution pipe, the second ink distribution pipe and the circulating ink box, in the printing operation process, the ink of main ink box is distributed to each nozzle through the first ink distribution pipe first, and then is circulated back to the circulating ink box through the second ink distribution pipe, the first ink distribution pipe can be used as the ink prestorage area between a plurality of nozzles and the main ink box on one hand, can guarantee that the sufficient ink supplies a plurality of nozzles in time, thereby avoiding the printing exception caused by the ink of main ink box not timely supplying the nozzle due to a plurality of nozzles being directly communicated with the main ink box, on the other hand, the first ink distribution pipe sets up the first shunt and is communicated with the input end of the nozzle, and the second ink distribution pipe sets up the second shunt and is communicated with the output end of the nozzle, and the first ink distribution pipe and the second ink distribution scrape can provide the mounting space of the nozzle and the main ink box, the circulating ink box under the condition that the number of nozzles increases. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a kind of printing device's perspective view provided by the utility model;

[0022] Figure 2 is another view of the printing device's perspective view provided by the utility model;

[0023] Figure 3 is Figure 1 Enlarged view of A in

[0024] EXPLANATION OF DRAWINGS:

[0025] 1, mounting bracket;2, main ink box;3, circulating ink box;4, nozzle;41, input end;42, output end;5, first ink distribution pipe;51, first shunt;6, second ink distribution pipe;61, second shunt;10, first control valve;20, second control valve;30, first exhaust valve;40, second exhaust valve;50, third control valve;60, first hose;70, second hose;701, first branch pipe;702, second branch pipe. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is combined with the drawings and example, and the utility model is further detailedly explained.It should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0027] Referring to Figure 1The utility model discloses a printing device, including mounting bracket 1, main ink tank 2, circulating ink tank 3, a plurality of inkjet head 4 (for facilitating the clear drawing, only one inkjet head 4 is shown in the drawing), first ink distribution pipe 5 and second ink distribution pipe 6, wherein main ink tank 2 and circulating ink tank 3 are located on mounting bracket 1, a plurality of inkjet head 4 is located at the bottom of mounting bracket 1, first ink distribution pipe 5 is located on mounting bracket 1 and communicates with main ink tank 2, first ink distribution pipe 5 is spaced apart and is equipped with a plurality of first flow port 51 along its axis direction, a plurality of first flow port 51 communicates with the input end 41 of a plurality of inkjet head 4, second ink distribution pipe 6 is located on mounting bracket 1 and communicates with circulating ink tank 3, second ink distribution pipe 6 is spaced apart and is equipped with a plurality of second flow port 61 along its axis direction, a plurality of first flow port 51 communicates with the output end 42 of a plurality of inkjet head 4, that is, the input end 41 and the output end 42 of one inkjet head 4 are connected with a first flow port 51 and a second flow port 61 respectively.

[0028] By setting first ink distribution pipe 5 to communicate the input end 41 of a plurality of inkjet head 4 with main ink tank 2, and second ink distribution pipe 6 to communicate the output end 42 of a plurality of inkjet head 4 with circulating ink tank 3, a circulating ink path is formed among main ink tank 2, inkjet head 4, first ink distribution pipe 5, second ink distribution pipe 6 and circulating ink tank 3, in the printing process, the ink in main ink tank 2 is first distributed to each inkjet head 4 through first ink distribution pipe 5, and then circulated back to circulating ink tank 3 through second ink distribution pipe 6, first ink distribution pipe 5 can serve as an ink pre-storage area between a plurality of inkjet head 4 and main ink tank 2 on the one hand, to ensure that sufficient ink is supplied to a plurality of inkjet head 4 in time, thereby avoiding printing abnormalities caused by the ink in main ink tank 2 not being supplied to inkjet head 4 in time due to the direct communication between inkjet head 4 and main ink tank 2, and on the other hand, first ink distribution pipe 5 is provided with first flow port 51 to communicate with the input end 41 of inkjet head 4, and second ink distribution pipe 6 is provided with second flow port 61 to communicate with the output end 42 of inkjet head 4, so that first ink distribution pipe 5 and second ink distribution pipe 6 can provide sufficient installation space for inkjet head 4, main ink tank 2 and circulating ink tank 3 when the number of inkjet head 4 increases.

[0029] The printing device provided by the utility model can simultaneously and timely meet the ink supply of a plurality of inkjet head 4, avoid printing abnormalities caused by insufficient ink supply when the number of inkjet head 4 increases, and also provide sufficient space for the installation of inkjet head 4, main ink tank 2 and circulating ink tank 3.

[0030] Specifically, a first ink distribution pipe 5 and a second ink distribution pipe 6 correspondingly connect a main ink cartridge 2 and a circulation ink cartridge 3, a plurality of nozzles 4 are connected between the first ink distribution pipe 5 and the second ink distribution pipe 6, the main ink cartridge 2 and the circulation ink cartridge 3 correspond to one color of ink in digital printing, when the ink in digital printing is of multiple colors, multiple main ink cartridges 2, multiple circulation ink cartridges 3, multiple first ink distribution pipes 5 and multiple second ink distribution pipes 6 can be provided to correspond to the multiple colors one by one, and the plurality of nozzles 4 connected between the first ink distribution pipe 5 and the second ink distribution pipe 6 spray the same color of ink.

[0031] In the present embodiment, four kinds of ink are used in the printing device for printing operation (for the sake of simplifying the drawing, only the connection structure of one set of main ink cartridge 2, circulation ink cartridge 3, first ink distribution pipe 5, second ink distribution pipe 6 and a plurality of nozzles 4 is shown in the drawing), therefore four sets of main ink cartridge 2, circulation ink cartridge 3, first ink distribution pipe 5 and second ink distribution pipe 6 are provided. Specifically, the four sets of main ink cartridge 2 and circulation ink cartridge 3 are provided on the top of the mounting frame 1, the first ink distribution pipe 5 and the second ink distribution pipe 6 are provided above the nozzles 4, the four sets of first ink distribution pipe 5 and second ink distribution pipe 6 are arranged horizontally, and the plurality of nozzles 4 are arranged along the axis direction of the first ink distribution pipe 5 or the second ink distribution pipe 6.

[0032] Specifically, the main ink cartridge 2 and the circulation ink cartridge 3 can be separately provided or integrally provided, and the integrally provided structure can make the main ink cartridge 2 and the circulation ink cartridge 3 more compact, thereby saving space.

[0033] Referring to Figure 2 Further, a first control valve 10 is provided between the main ink cartridge 2 and the first ink distribution pipe 5 to control the on-off of the passage between the main ink cartridge 2 and the first ink distribution pipe 5, and a second control valve 20 is provided between the circulation ink cartridge 3 and the second ink distribution pipe 6 to control the on-off of the passage between the circulation ink cartridge 3 and the second ink distribution pipe 6. By the first control valve 10 and the second control valve 20, the on-off of the ink between the main ink cartridge 2 and the first ink distribution pipe 5 and between the circulation ink cartridge 3 and the second ink distribution pipe 6 can be controlled, thereby facilitating the disassembly and / or replacement of the first ink distribution pipe 5 and the second ink distribution pipe 6.

[0034] Specifically, the first control valve 10 and the second control valve 20 are pneumatic valves, and the use of pneumatic valves can avoid the first control valve 10 and the second control valve 20 from heating up during long-term use, thereby improving the service life of the first control valve 10 and the second control valve 20, and preventing the ink from being heated up during use to cause the temperature of the ink to rise and thereby affect the printing effect.

[0035] Referring to Figure 2Specifically, the main ink box 2 and the first ink distribution pipe 5 and the circulation ink box 3 and the second ink distribution pipe 6 are communicated by the first hose 60, the first control valve 10 is arranged at the ink outlet end of the main ink box 2, the second control valve 20 is arranged at the ink return end of the circulation ink box 3, one first hose 60 is communicated with the ink outlet end of the main ink box 2 through the first control valve 10, and one first hose 60 is communicated with the ink return end of the circulation ink box 3 through the second control valve 20.

[0036] Referring to Figure 3 Specifically, the first flow port 51 and the second flow port 61 are communicated with the input end 41 and the output end 42 of the inkjet head 4 by the second hose 70.

[0037] Referring to Figure 2 Further, the first exhaust valve 30 is arranged on the first ink distribution pipe 5, and the second exhaust valve 40 is arranged on the second ink distribution pipe 6. Through the first exhaust valve 30 and the second exhaust valve 40, the air in the first ink distribution pipe 5 and the second ink distribution pipe 6 can be effectively discharged in time, so that the air mixed into the ink does not cause the printing of the inkjet head 4.

[0038] Referring to Figures 2-3 Further, the main ink box 2 is communicated with the middle part of the first ink distribution pipe 5, so that the ink can flow uniformly and quickly from the middle part of the first ink distribution pipe 5 to both ends, and the ink in the first ink distribution pipe 5 can be evenly delivered to each inkjet head 4 connected thereto. The first exhaust valve 30 is arranged at both ends of the first ink distribution pipe 5, and when the ink in the main ink box 2 is input from the middle part of the first ink distribution pipe 5, the flow of the ink to both ends will drive the air to both ends. Therefore, the first exhaust valve 30 arranged at both ends of the first ink distribution pipe 5 is beneficial to the exhaust of the air in the first ink distribution pipe 5. The circulation ink box 3 is communicated with the middle part of the second ink distribution pipe 6, so that the ink in the inkjet heads 4 connected to the middle part of the circulation ink box 3 can flow quickly from the second flow port 61 back to the second ink distribution pipe 6 and enter the circulation ink box 3. The second exhaust valve 40 is arranged at both ends of the second ink distribution pipe 6, so that when the ink at both ends flows from the middle part of the second ink distribution pipe 6, the air is extruded to both ends, which is also beneficial to the exhaust of the air in the second ink distribution pipe 6.

[0039] Referring to Figure 3 Further, the third control valve 50 is arranged on each first flow port 51 and each second flow port 61. Through the third control valve 50, the on-off control of the single inkjet head 4 can be realized, so that the replacement of the single inkjet head 4 is facilitated.

[0040] Specifically, the third control valve 50 can be a manual valve, but is not limited thereto.

[0041] Referring to Figure 2Further, the first ink distribution pipe 5 and the second ink distribution pipe 6 are arranged in parallel, the plurality of nozzles 4 are arranged along the axis of the first ink distribution pipe 5 or the second ink distribution pipe 6, and the first distribution port 51 and the second distribution port 61 connected to the same nozzle 4 are arranged staggeredly in the axial direction of the first ink distribution pipe 5 or the second ink distribution pipe 6. Since the input end 41 and the output end 42 of the nozzle 4 are located on opposite sides, the staggered arrangement of the first distribution port 51 and the second distribution port 61 connected to the same nozzle 4 can facilitate the correspondence of the first distribution port 51 with the input end 41 of the nozzle 4, the correspondence of the second distribution port 61 with the output end 42 of the nozzle 4, the communication of the first distribution port 51 and the second distribution port 61 with the nozzle 4, the neat arrangement of the second hose 70, and the avoidance of the cross-winding of the second hoses 70.

[0042] Referring to Figure 3 It should be noted that the ink cavity in the nozzle 4 can be one, two or more. When the ink cavity in the nozzle 4 is one, the input end 41 and the output end 42 of the nozzle 4 are both one. When the ink cavity in the nozzle 4 is two, the input end 41 and the output end 42 of the nozzle 4 are both two, i.e., the number of the input end 41 and the output end 42 of the nozzle 4 matches the number of the ink cavity. The nozzle 4 of the embodiment has two ink cavities, and thus has two input ends 41 and two output ends 42. One end of each second hose 70 connected to the nozzle 4 is provided with a first branch pipe 701 and a second branch pipe 702, and the first branch pipe 701 and the second branch pipe 702 are connected to the two input ends 41 or the two output ends 42, respectively. In this way, the total number of the second hoses 70 can be saved.

[0043] Referring to Figure 3 Further, the distance between two adjacent first distribution ports 51 is equal to the distance between two adjacent second distribution ports 61, and the first first distribution port 51 of the first ink distribution pipe 5 and the first second distribution port 61 of the second ink distribution pipe 6 are arranged staggeredly in the arrangement direction of the plurality of nozzles 4. In this way, the equal distance arrangement and the staggered arrangement of the first first distribution port 51 and the first second distribution port 61 can facilitate the adjustment of the corresponding two first distribution ports 51 and second distribution ports 61 in the entire first distribution pipe and the entire second distribution pipe.

[0044] Referring to Figure 3 Further, the number of the plurality of first distribution ports 51 is equal to the number of the plurality of second distribution ports 61, and the same ends of the first ink distribution pipe 5 and the second ink distribution pipe 6 are arranged staggeredly. In this way, the first ink distribution pipe 5 and the second ink distribution pipe 6 can be produced in batches, i.e., the first ink distribution pipe 5 and the second ink distribution pipe 6 can be arranged in the same structure without separate production, which improves the production efficiency. During installation, the same ends of the two ink distribution pipes are arranged staggeredly, and then the main ink cartridge 2 and the circulating ink cartridge 3 are connected, respectively, so that the plurality of first distribution ports 51 and the plurality of second distribution ports 61 can be arranged staggeredly in the arrangement direction of the nozzles 4.

[0045] The utility model still provides a kind of digital printing equipment, including the printing device of preceding description.The utility model provides digital printing equipment, can meet ink supply simultaneously and in time for several spray heads 4, avoid that the abnormal printing caused by ink supply shortage when the number of spray head 4 increases, and still enough space can be provided for the installation of spray head 4 and ink cartridge.

[0046] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model, any modification, equivalent replacement and improvement etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A printing device, characterized by, The printing device comprises: a mounting frame; a main ink cartridge and a circulating ink cartridge arranged on the mounting frame; a plurality of nozzles arranged at the bottom of the mounting frame; a first ink distribution pipe arranged on the mounting frame and in communication with the main ink cartridge, the first ink distribution pipe being provided with a plurality of first distribution ports at intervals along its axial direction, and the plurality of first distribution ports being in communication with the input ends of the plurality of nozzles; a second ink distribution pipe arranged on the mounting frame and in communication with the circulating ink cartridge, the second ink distribution pipe being provided with a plurality of second distribution ports at intervals along its axial direction, and the plurality of first distribution ports being in communication with the output ends of the plurality of nozzles.

2. The printing device of claim 1, wherein, A first control valve is arranged between the main ink cartridge and the first ink distribution pipe to control the opening and closing of the passage between the main ink cartridge and the first ink distribution pipe, and a second control valve is arranged between the circulating ink cartridge and the second ink distribution pipe to control the opening and closing of the passage between the circulating ink cartridge and the second ink distribution pipe.

3. The printing device of claim 2, wherein, The first control valve and the second control valve are pneumatic valves.

4. The printing device of claim 1, wherein, The first ink distribution pipe is provided with a first exhaust valve, and the second ink distribution pipe is provided with a second exhaust valve.

5. The printing device of claim 4, wherein, The main ink cartridge is in communication with the middle part of the first ink distribution pipe, and the first exhaust valve is arranged at both ends of the first ink distribution pipe. The circulating ink cartridge is in communication with the middle part of the second ink distribution pipe, and the second exhaust valve is arranged at both ends of the second ink distribution pipe.

6. The printing device of claim 1, wherein Each of the first distribution ports and the second distribution ports is provided with a third control valve.

7. The printing device of claim 1, wherein The first ink distribution pipe and the second ink distribution pipe are arranged in parallel, and the plurality of nozzles are arranged along the axial direction of the first ink distribution pipe or the second ink distribution pipe, and the first distribution port and the second distribution port connected to the same nozzle are arranged at different positions in the axial direction of the first ink distribution pipe or the second ink distribution pipe.

8. The printing device of claim 7, wherein, The distance between two adjacent first distribution ports is equal to the distance between two adjacent second distribution ports, and the first distribution port at the first position of the first ink distribution pipe and the second distribution port at the first position of the second ink distribution pipe are arranged at different positions in the arrangement direction of the plurality of nozzles.

9. The printing device of claim 8, wherein, The number of the plurality of first distribution ports is equal to the number of the plurality of second distribution ports, and the same ends of the first ink distribution pipe and the second ink distribution pipe are arranged at different positions.

10. A digital printing apparatus characterized by comprising: The printing device comprises any one of claims 1-9.

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