CN212372979U

CN212372979U - Ink path circulating system of digital ink-jet printing machine

Info

Publication number: CN212372979U
Application number: CN202020977827.9U
Authority: CN
Inventors: 马可
Original assignee: System (china) Technology Co ltd
Current assignee: System (china) Technology Co ltd
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2021-01-19
Anticipated expiration: 2030-06-02

Abstract

The utility model discloses an ink path circulation system of digital inkjet printing machine, include and be used for printing last china ink jar (1) that shower nozzle (3) supplied ink and be used for supplying china ink jar (2) down for last china ink jar (1), the entry linkage china ink bucket (4) of china ink jar (2) down, the entry of the exit linkage china ink jar (1) of china ink jar (2) down, the export of last china ink jar (1) is through a plurality of shower nozzles (3) of printing and finally lead to last china ink jar (1), it takes out china ink pump two (5), filter (6) and switching-over valve (7) to set gradually between the export of lower china ink jar (2) and the entry of last china ink jar (1), switching-over valve (7) still link to each other with the entry of lower china ink jar (2). The utility model discloses eliminate the ink and deposit the phenomenon, make the ink remain even unanimous throughout, keep printing stably.

Description

Ink path circulating system of digital ink-jet printing machine

Technical Field

The utility model relates to an china ink way circulation system of digital inkjet printing machine.

Background

In the normal operation of an ink jet printer, an ink supply system is required to continuously and stably supply ink to a printing nozzle. With the gradual improvement of the requirement of equipment automation and the improvement of the requirements of printing definition and printing stability, the current ink supply system cannot meet the requirements.

The current ink circulating system comprises an upper ink tank for supplying ink to a printing nozzle and a lower ink tank for supplying ink to the upper ink tank, wherein an inlet of the lower ink tank is connected with an ink barrel, the ink barrel is used for supplying ink to the lower ink tank, the lower ink tank supplies ink to the upper ink tank, and in the ink supplying process, ink is easy to precipitate to influence the printing effect.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above disadvantages, an object of the present invention is to provide an ink path circulation system for a digital inkjet printing machine, which eliminates the ink sedimentation phenomenon, keeps the ink uniform and consistent all the time, and keeps printing stability.

In order to achieve the above purpose, the utility model discloses a technical scheme is: the utility model provides an ink path circulation system of digital inkjet printing machine, includes and is used for printing the last china ink jar that the shower nozzle supplied ink and is used for the lower china ink jar that supplies ink for last china ink jar, the entry linkage china ink bucket of lower china ink jar, the entry of the exit linkage china ink jar of lower china ink jar, the export of last china ink jar is through a plurality of printing shower nozzles and finally leads to last china ink jar, it takes out china ink pump two, filter one and switching-over valve to set gradually between the export of lower china ink jar and the entry of last china ink jar, the switching-over valve still links to each other with the entry of lower china ink jar.

The utility model discloses digital inkjet calico printing machine's china ink way circulation system's beneficial effect is, the switching-over valve is used for making a round trip to switch in the entry linkage of filter one and last china ink jar, filter one and the entry linkage of china ink jar down, switch over to the entry linkage of filter one and lower china ink jar when the switching-over valve, take out the ink in the china ink jar under two will through filter one after in taking out to china ink jar down, ink automatic cycle return circuit has been formed, china ink jar ink circulation has been kept down, prevent that the ink from taking place to deposit, the ink phenomenon of deposiing has been solved easily to take place, the problem of effect is printed in the influence. When the reversing valve is switched to be connected with the inlet of the first filter and the inlet of the upper ink tank, the second ink pump pumps the ink in the lower ink tank to the upper ink tank after passing through the first filter, and at the moment, in an ink supply state for the upper ink tank, the first filter can purify and filter the ink to prevent the ink entering the upper ink tank and the self-circulating ink of the lower ink tank from containing impurities.

Preferably, the reversing valve can be opened manually by an operator, or can be opened automatically according to the liquid amount in the inking tank, in order to realize the function, a first high liquid level sensor and a first low liquid level sensor are further arranged in the inking tank, the first high liquid level sensor and the first low liquid level sensor are respectively connected with the input end of a controller of the digital ink-jet printing machine, and the output end of the controller is connected with the reversing valve. When the low liquid level sensor in the ink tank detects that the ink is insufficient, the reversing valve is switched to the left loop to work (an ink supply state is provided for the ink tank) and is in the ink supply state. When the high liquid level sensor detects that the liquid level of the ink reaches the high liquid level, the reversing valve is switched to the right loop to work, and the ink discharging tank enters a self-circulation state.

As a further improvement of the utility model, the current ink barrel supplies ink to the lower ink tank through manual filling ink, so that the operation is troublesome and the labor is wasted. In order to solve the problem, a first ink pumping pump is arranged between the lower ink tank and the ink barrel, a second high liquid level sensor and a second low liquid level sensor are arranged on the lower ink tank, the second high liquid level sensor and the second low liquid level sensor are respectively connected with the input end of a controller of the digital ink-jet printing machine, and the output end of the controller is connected with the first ink pumping pump. When the low liquid level sensor II in the ink discharging tank detects that the ink is insufficient, the ink pumping pump I automatically pumps the ink in the ink barrel into the ink discharging tank. And when the high liquid level sensor II detects that the liquid level of the ink reaches a high liquid level, the first ink pump stops working. So that the lower ink tank always keeps enough ink to be supplied to the upper ink tank.

As a further improvement, when the ink in the present ink supply system is input to the printing nozzle, the inside contains a small amount of air components, influences the equipment printing effect, in order to solve this problem, the export of inking jar respectively with a plurality of print have set gradually take out china ink pump three, vapour and liquid separator, filter two between the nozzle, vapour and liquid separator still links to each other with vacuum ink discharge jar, vacuum pump two in proper order. When the ink passes through the gas-liquid separator, air in the ink is discharged into the vacuum ink discharge tank under the action of vacuum negative pressure, and then is discharged to the outside of the equipment through the vacuum pump II, so that the ink air in the main ink path for supplying the ink supply tank to the plurality of printing nozzles is removed.

Preferably, a first pressure gauge is arranged on the vacuum ink discharge tank, the first pressure gauge is connected with the input end of a controller of the digital ink-jet printing machine, and the output end of the controller is connected with a second vacuum pump. The first pressure gauge detects the air pressure value in the vacuum ink discharging tank, when the air pressure value is large, the controller controls the second vacuum pump to start working, air in the vacuum ink discharging tank is pumped out, vacuum negative pressure is generated in the vacuum ink discharging tank, and the vacuum ink discharging tank is connected with the gas-liquid separators in the color bar assemblies through the distribution blocks.

Preferably, the gas-liquid separator discharges a small amount of ink in the whole process, the ink is stored in the vacuum ink discharge tank due to gravity when passing through the vacuum ink discharge tank, and in order to solve the problem, the bottom of the vacuum ink discharge tank is provided with a valve. When the ink collected in the vacuum ink discharging tank reaches a certain value, a worker can open the valve below the tank body to discharge the collected ink, and the environment protection is facilitated.

Preferably, a liquid level sensor is arranged in the vacuum ink discharging tank, the liquid level sensor is connected with the input end of a controller of the digital ink-jet printing machine, and the output end of the controller is connected with an alarm. Whether ink in the vacuum ink discharging tank reaches a certain value is monitored through a liquid level sensor on the vacuum ink discharging tank, when ink collected in the vacuum ink discharging tank reaches the height of the liquid level sensor, a warning signal can be sent by an alarm, a worker can open a valve below the tank body conveniently, and collected ink is discharged.

Preferably, the ink path for pumping the ink in the ink tank to the plurality of printing nozzles by the third ink pumping pump is an external circulation ink path, and the ink path circulation system further comprises an internal circulation ink path for pumping the redundant ink in the printing nozzles back to the ink tank; the internal circulation ink path comprises an internal circulation magnetic pump and a plunger pump, ink outlets of all the printing nozzles are respectively connected with an inlet of the ink feeding tank through the internal circulation magnetic pump and the plunger pump, and the internal circulation magnetic pump is connected with the plunger pump in parallel. An internal circulation magnetic pump is added in an internal circulation pipeline, an original plunger pump and the internal circulation magnetic pump are connected in parallel and connected into an internal circulation ink path, so that a double pump is formed to replace an original single pump for working, the flow rate of the internal circulation magnetic pump is larger, the internal circulation ink path can have larger flow rate, and the working requirement of installing more color bar assemblies of nozzles is met; the newly-added internal circulation magnetic pump works as a main pump and is used in a general working state; the plunger pump becomes the auxiliary pump and carries out work for when the ink way starts and the air is more time work in the ink way, the life of extension internal circulating pump (plunger pump), improve equipment's steady operation period, reduce the maintenance cost of equipment, practice thrift the manual work.

Preferably, when the ink in the current ink supply system is input into the ink tank, fine impurities are contained, the original filtering assembly cannot meet the filtering requirement, the printing spray head is easily blocked, and once the blockage needs to be cleaned and maintained manually, the time consumption is long. Therefore, the first filter adopts a 10um grade filter, and the second filter adopts a 20um grade filter.

Drawings

Fig. 1 is a schematic diagram of an ink path of the present embodiment.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to fig. 1, an ink path circulating system of a digital inkjet printing machine according to this embodiment is used to improve the automation level of ink injection of the apparatus, simplify operations, and save labor; the ink sedimentation phenomenon is eliminated, so that the ink is always uniform and consistent, and the printing stability is kept; eliminating the air component of the ink input into the printing nozzle, and improving the printing effect and the stability thereof; remove the impurity in the china ink, prevent that the shower nozzle from blocking up, reduce the equipment maintenance time, specifically realize through following structure.

The ink path circulating system of the digital ink-jet printing machine comprises an upper ink tank 1 for supplying ink to printing nozzles 3 and a lower ink tank 2 for supplying ink to the upper ink tank 1, wherein an inlet of the lower ink tank 2 is connected with an ink bucket 4, an outlet of the lower ink tank 2 is connected with an inlet of the upper ink tank 1, an outlet of the upper ink tank 1 passes through the printing nozzles 3 and finally leads to the upper ink tank 1, an ink pumping pump II 5, a filter I6 and a reversing valve 7 are sequentially arranged between an outlet of the lower ink tank 2 and an inlet of the upper ink tank 1, and the reversing valve 7 is further connected with an inlet of the lower ink tank 2. When the reversing valve is switched to the inlet connection of the first filter and the lower ink tank, ink circulation of the lower ink tank is achieved, ink is prevented from precipitating, and the problem that ink is easy to precipitate is solved. When the reversing valve is switched to the first filter to be connected with the inlet of the ink feeding tank, the ink feeding state is performed on the ink feeding tank. The first filter is used for purifying and filtering ink, and the first filter 6 adopts a 10 um-level filter to prevent impurities from entering the ink tank and in the self-circulating ink of the ink tank.

The switching of the reversing valve 7 is controlled by a controller, a high liquid level sensor I8 and a low liquid level sensor I9 are arranged in the inking tank 1 in the embodiment, the high liquid level sensor I8 and the low liquid level sensor I9 are respectively connected with the input end of the controller of the digital ink-jet printing machine, and the output end of the controller is connected with the reversing valve 7. When the low liquid level sensor in the ink supply tank detects that the ink is insufficient, the reversing valve is switched to an ink supply state for the ink supply tank; when the high liquid level sensor detects that the liquid level of the ink reaches the high liquid level, the reversing valve is switched to the ink tank to enter a self-circulation state.

In this embodiment, ink in the lower ink tank 2 is automatically supplied, the first ink pump 10 is disposed between the lower ink tank 2 and the ink barrel 4, the second high liquid level sensor 11 and the second low liquid level sensor 12 are disposed on the lower ink tank 2, the second high liquid level sensor 11 and the second low liquid level sensor 12 are respectively connected to an input end of a controller of the digital inkjet printing machine, and an output end of the controller is connected to the first ink pump 10. When the low liquid level sensor II in the ink discharging tank detects that the ink is insufficient, the ink pumping pump I automatically pumps the ink in the ink barrel into the ink discharging tank. And when the high liquid level sensor II detects that the liquid level of the ink reaches a high liquid level, the first ink pump stops working. The lower ink tank can be always kept with enough ink to be supplied to the upper ink tank, so that manual ink filling is replaced, the operation is simplified, and the labor is saved.

An ink pump III 13, a gas-liquid separator 14 and a filter II 15 are sequentially arranged between the outlet of the ink feeding tank 1 and the plurality of printing nozzles 3, and the gas-liquid separator 14 is further sequentially connected with a vacuum ink discharging tank 23 and a vacuum pump II 24. Because the vacuum ink discharging tank 23 is in a vacuum negative pressure state, air in the ink which is led to the printing nozzle 3 is discharged, and then the ink is discharged to the outside of the device through the vacuum pump II. And the second filter 15 adopts a 20um grade filter.

The starting of the vacuum ink discharging tank 23 is driven by a controller, a first pressure gauge 16 is arranged on the vacuum ink discharging tank 23, the first pressure gauge 16 is connected with the input end of the controller of the digital ink-jet printing machine, and the output end of the controller is connected with a second vacuum pump 24. When the air pressure value is larger, the controller controls the vacuum pump II to start working, vacuum negative pressure is generated in the vacuum ink discharging tank, and air is removed.

The gas-liquid separator can discharge a small amount of ink in the whole process, and the ink can be stored in the vacuum ink discharge tank due to the action of gravity when passing through the vacuum ink discharge tank, and the valve 17 is arranged at the bottom of the vacuum ink discharge tank 23 in the embodiment. When the ink collected in the vacuum ink discharging tank reaches a certain value, a worker opens a valve below the tank body to discharge the collected ink. In order to realize automation, a liquid level sensor 18 is arranged in the vacuum ink discharge tank 23, the liquid level sensor 18 is connected with the input end of a controller of the digital ink-jet printing machine, and the output end of the controller is connected with an alarm. When the ink that collects in the vacuum ink discharging tank reaches the level sensor height, the siren can send out warning signal, makes things convenient for the staff to open jar body below valve, discharges the ink of collecting.

The ink path for pumping the ink in the ink tank 1 to the plurality of printing nozzles 3 by the third ink-pumping pump 13 is an external circulation ink path 19, the ink path circulation system further comprises an internal circulation ink path 20 for pumping the redundant ink in the printing nozzles 3 back to the ink tank 1, the internal circulation ink path 20 comprises an internal circulation magnetic pump 21 and a plunger pump 22, the ink outlets of all the printing nozzles 3 are respectively connected with the inlet of the ink tank 1 through the internal circulation magnetic pump 21 and the plunger pump 22, and the internal circulation magnetic pump 21 is connected with the plunger pump 22 in parallel.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.

Claims

1. The utility model provides an ink route circulation system of digital inkjet printing machine, includes and is used for printing last china ink jar (1) that shower nozzle (3) supplied ink and be used for the lower china ink jar (2) that supplies ink for last china ink jar (1), the entry linkage ink bucket (4) of lower china ink jar (2), the entry of lower china ink jar (2) exit linkage ink jar (1), the export of last china ink jar (1) is through a plurality of print nozzle (3) and finally lead to last china ink jar (1), its characterized in that: an ink pumping pump II (5), a filter I (6) and a reversing valve (7) are sequentially arranged between the outlet of the lower ink tank (2) and the inlet of the upper ink tank (1), and the reversing valve (7) is also connected with the inlet of the lower ink tank (2).

2. The ink path circulation system of a digital inkjet printing machine according to claim 1, characterized in that: the printing ink feeding device is characterized in that a first high liquid level sensor (8) and a first low liquid level sensor (9) are arranged in the printing ink feeding tank (1), the first high liquid level sensor (8) and the first low liquid level sensor (9) are respectively connected with the input end of a controller of the digital ink-jet printing machine, and the output end of the controller is connected with the reversing valve (7).

3. The ink path circulation system of a digital inkjet printing machine according to claim 1, characterized in that: be provided with between lower china ink jar (2) and china ink bucket (4) and take out china ink pump (10), be provided with high level sensor two (11), low level sensor two (12) down on china ink jar (2), high level sensor two (11), low level sensor two (12) link to each other with the input of digital inkjet printing machine's controller respectively, the output of controller links to each other with taking out china ink pump (10).

4. The ink path circulation system of a digital inkjet printing machine according to claim 1, characterized in that: an ink pumping pump III (13), a gas-liquid separator (14) and a filter II (15) are sequentially arranged between the outlet of the inking tank (1) and the printing nozzles (3), and the gas-liquid separator (14) is further sequentially connected with a vacuum ink discharging tank (23) and a vacuum pump II (24).

5. The ink path circulation system of a digital inkjet printing machine according to claim 4, characterized in that: and a first pressure gauge (16) is arranged on the vacuum ink discharge tank (23), the first pressure gauge (16) is connected with the input end of a controller of the digital ink-jet printing machine, and the output end of the controller is connected with a second vacuum pump (24).

6. The ink path circulation system of a digital inkjet printing machine according to claim 4, characterized in that: and a valve (17) is arranged at the bottom of the vacuum ink discharging tank (23).

7. The ink path circulation system of a digital inkjet printing machine according to claim 6, characterized in that: a liquid level sensor (18) is arranged in the vacuum ink discharging tank (23), the liquid level sensor (18) is connected with the input end of a controller of the digital ink-jet printing machine, and the output end of the controller is connected with an alarm.

8. The ink path circulation system of a digital inkjet printing machine according to claim 1, characterized in that: the ink-pumping pump III (13) pumps ink in the ink-feeding tank (1) to the ink paths of the plurality of printing nozzles (3) to form an outer circulation ink path (19), the ink path circulation system further comprises an inner circulation ink path (20) used for pumping redundant ink in the printing nozzles (3) back to the ink-feeding tank (1), the inner circulation ink path (20) comprises an inner circulation magnetic pump (21) and a plunger pump (22), ink outlets of all the printing nozzles (3) are respectively connected with inlets of the ink-feeding tank (1) through the inner circulation magnetic pump (21) and the plunger pump (22), and the inner circulation magnetic pump (21) is connected with the plunger pump (22) in parallel.

9. The ink path circulation system of a digital inkjet printing machine according to claim 4, characterized in that: filter one (6) adopts 10um level filter, filter two (15) adopt 20um level filter.