CN117621668B - A three-level ink path protection system and method for a 3D inkjet printer - Google Patents

A three-level ink path protection system and method for a 3D inkjet printer

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Publication number
CN117621668B
CN117621668B CN202311838157.7A CN202311838157A CN117621668B CN 117621668 B CN117621668 B CN 117621668B CN 202311838157 A CN202311838157 A CN 202311838157A CN 117621668 B CN117621668 B CN 117621668B
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CN
China
Prior art keywords
ink
bottle
safety buffer
floating ball
return
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Active
Application number
CN202311838157.7A
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Chinese (zh)
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CN117621668A (en
Inventor
包建东
马立丰
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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Priority to CN202311838157.7A priority Critical patent/CN117621668B/en
Publication of CN117621668A publication Critical patent/CN117621668A/en
Application granted granted Critical
Publication of CN117621668B publication Critical patent/CN117621668B/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/18—Ink recirculation systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17563—Ink filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17566—Ink level or ink residue control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17596—Ink pumps, ink valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/18—Ink recirculation systems
    • B41J2/185—Ink-collectors; Ink-catchers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17566—Ink level or ink residue control
    • B41J2002/17576—Ink level or ink residue control using a floater for ink level indication

Landscapes

  • Ink Jet (AREA)

Abstract

The invention discloses an ink path three-level protection system and method of a 3D ink-jet printing device. The system comprises a negative pressure system, a spray head, an ink feeding bottle, an ink returning bottle, an ink feeding safety buffer bottle, an ink returning safety buffer bottle, an ink feeding bottle normally closed electromagnetic valve, an ink returning bottle normally closed electromagnetic valve, an ink feeding bottle two-way electromagnetic valve, an ink returning safety buffer bottle two-way electromagnetic valve, an ink feeding safety buffer bottle two-way electromagnetic valve, an ink returning bottle ink pump, an ink feeding bottle ink pump, an ink returning butterfly filter and an ink feeding butterfly filter. When the negative pressure system starts to work, suction force is generated on residual ink in the spray head, the ink enters the ink return bottle, and three-stage protection of an ink path is performed through the high-liquid-level floating ball of the ink inlet bottle and the ink return bottle, the low-liquid-level floating ball of the ink inlet and ink return safety buffer bottle and the high-liquid-level floating ball of the ink inlet and ink return safety buffer bottle respectively. The invention reduces the risk of ink back-overflow of the 3D ink-jet printing device into the negative pressure system, and improves the safety and reliability of the system and the running stability of equipment.

Description

Three-level protection system and method for ink path of 3D ink-jet printing device
Technical Field
The invention relates to the technical field of 3D ink-jet printing, in particular to an ink path three-level protection system and method of a 3D ink-jet printing device.
Background
A 3D inkjet printing apparatus is an apparatus that prints a pattern onto a consumable by ejecting ink. The shower nozzle is the core in the 3D inkjet printing device, and the safety protection of shower nozzle is very important, and inkjet printing device can set up negative pressure system generally, makes residual ink in negative pressure suction shower nozzle, prevents that the shower nozzle from blockking up, when the protection system of ink circuit breaks down, causes easily that the residual ink in advance ink bottle and the ink bottle returns is too much, and when more serious, there is residual ink to fill up safe buffer bottle to continue to spill over into in the negative pressure system, cause negative pressure system damage inefficacy.
The protection system of the ink path generally uses a mode of controlling the electromagnetic valve by using a sensor, and controls the opening and closing of the electromagnetic valve according to the liquid level height, so that the ink is prevented from flowing into the negative pressure system, and the negative pressure system is prevented from being damaged. The ink path protection system relates to sensor technology, control logic and the like. By combining these techniques, the inkjet printing device nozzle and negative pressure system can achieve further safety protection for coping with extreme conditions and protecting the device from safe and stable operation.
Patent CN 219505672U discloses a protection device for an inkjet printhead and an inkjet printing apparatus, which use an inert gas atmosphere to protect the inkjet printhead and prevent the inkjet printhead from being blocked, and patent CN201010147577 discloses a wiping maintenance device for an inkjet printer, which can protect a nozzle when the nozzle does not work, and make the nozzle in a wet state. The existing research is mainly focused on the field of spray head protection, and the research on ink path system protection is lacked.
Disclosure of Invention
The invention aims to provide an ink path protection system and method of a 3D ink-jet printing device, which can solve the problem of negative pressure system damage caused by ink back overflow in the ink-jet printing process and provide reliable protection for safe and stable operation of equipment.
The technical scheme for realizing the aim is that the three-stage protection system of the ink path of the 3D ink jet printing device comprises a negative pressure system, a spray head, an ink inlet bottle, an ink return bottle, an ink inlet safety buffer bottle, an ink return safety buffer bottle, an ink inlet bottle normally-closed electromagnetic valve, an ink return bottle normally-closed electromagnetic valve, an ink inlet bottle two-way electromagnetic valve, an ink return safety buffer bottle two-way electromagnetic valve, an ink inlet safety buffer bottle two-way electromagnetic valve, an ink return bottle ink pump, an ink inlet bottle ink pump, an ink return butterfly filter and an ink inlet butterfly filter;
The ink inlet end of the ink inlet bottle is connected with an ink inlet bottle ink pump, the front end of the ink inlet bottle ink pump is provided with a one-way valve connected with an ink inlet butterfly filter, the lower end of the ink inlet bottle is connected with an ink inlet bottle normally closed electromagnetic valve and is connected with a spray head through a pipeline, the upper end of the ink inlet bottle is connected with a two-way electromagnetic valve of the ink inlet bottle, the two-way electromagnetic valve of the ink inlet bottle is connected with an ink inlet opening of an ink inlet safety buffer bottle, an ink outlet opening of the ink inlet safety buffer bottle is connected with the two-way electromagnetic valve of the ink inlet safety buffer bottle, and the two-way electromagnetic valve of the ink inlet safety buffer bottle is connected to a negative pressure system;
The ink return end of the ink return bottle is connected with an ink return bottle ink pump, the ink return end of the ink return bottle ink pump is provided with a one-way valve to be connected with an ink return butterfly filter, the lower end of the ink return bottle is connected with a normally closed electromagnetic valve of the ink return bottle and is connected with a spray head through a pipeline, the upper end of the ink return bottle is connected with a two-way electromagnetic valve of the ink return bottle, the two-way electromagnetic valve of the ink return bottle is connected with an ink inlet of an ink return safety buffer bottle, an ink outlet of the ink return safety buffer bottle is connected with the two-way electromagnetic valve of the ink return safety buffer bottle, and the two-way electromagnetic valve of the ink return safety buffer bottle is connected to a negative pressure system.
Further, an ink inlet bottle low-liquid-level floating ball and an ink inlet bottle high-liquid-level floating ball are arranged in the ink inlet bottle, the ink inlet bottle low-liquid-level floating ball is used for controlling the opening and closing of an ink inlet bottle ink pump, and the ink inlet bottle high-liquid-level floating ball is used for controlling the opening and closing of an ink inlet bottle two-way electromagnetic valve.
Further, a low liquid level floating ball of the ink return bottle and a high liquid level floating ball of the ink return bottle are arranged in the ink return bottle, the low liquid level floating ball of the ink return bottle is used for controlling the opening and closing of an ink pump of the ink return bottle, and the high liquid level floating ball of the ink return bottle is used for controlling the opening and closing of a two-way electromagnetic valve of the ink return bottle.
Further, an ink inlet safety buffer bottle low-liquid-level floating ball and an ink inlet safety buffer bottle high-liquid-level floating ball are arranged in the ink inlet safety buffer bottle, the ink inlet safety buffer bottle low-liquid-level floating ball is used for controlling a switch of a negative pressure system, and the ink inlet safety buffer bottle high-liquid-level floating ball is used for controlling opening and closing of a two-way electromagnetic valve of the ink inlet safety buffer bottle.
The ink return safety buffer bottle is characterized in that an ink return safety buffer bottle low-liquid-level floating ball and an ink return safety buffer bottle high-liquid-level floating ball are arranged in the ink return safety buffer bottle, the ink return safety buffer bottle low-liquid-level floating ball is used for controlling a switch of a negative pressure system, and the ink return safety buffer bottle high-liquid-level floating ball is used for controlling the opening and closing of a two-way electromagnetic valve of the ink return safety buffer bottle.
The three-level protection method of the ink path of the 3D ink-jet printing device is based on the three-level protection system of the ink path of the 3D ink-jet printing device and comprises the following steps:
step 1, after a negative pressure system starts to work, generating suction force on residual ink in a spray head, and enabling the ink to enter an ink return bottle;
Step 2, performing first-layer protection through an ink inlet bottle low-liquid-level floating ball, an ink inlet bottle high-liquid-level floating ball, an ink return bottle low-liquid-level floating ball and an ink return bottle high-liquid-level floating ball;
step 3, performing second-layer protection through the low-liquid-level floating ball of the ink inlet safety buffer bottle and the low-liquid-level floating ball of the ink return safety buffer bottle;
And 4, performing third-layer protection through the high-liquid-level floating ball of the ink inlet safety buffer bottle and the high-liquid-level floating ball of the ink return safety buffer bottle.
Further, in step 2, the first layer protection is performed by the low liquid level floating ball of the ink inlet bottle, the high liquid level floating ball of the ink inlet bottle, the low liquid level floating ball of the ink return bottle and the high liquid level floating ball of the ink return bottle, which is specifically as follows:
when the liquid level in the ink feeding bottle reaches the height of the low liquid level floating ball of the ink feeding bottle or the liquid level in the ink returning bottle reaches the height of the low liquid level floating ball of the ink returning bottle, the sensor controls the ink pump of the ink feeding bottle or the ink pump of the ink returning bottle to be closed, and when the liquid level in the ink feeding bottle reaches the height of the high liquid level floating ball of the ink feeding bottle or the liquid level in the ink returning bottle reaches the height of the high liquid level floating ball of the ink returning bottle, the sensor controls the two-way electromagnetic valve of the ink feeding bottle or the two-way electromagnetic valve of the ink returning bottle to be closed, so that ink is prevented from continuously overflowing back, and the first layer of protection is achieved.
Further, in the step 3, the second layer protection is performed through the low liquid level floating ball of the ink inlet safety buffer bottle and the low liquid level floating ball of the ink return safety buffer bottle, which is specifically as follows:
When the ink feeding bottle is continuously failed, the two-way electromagnetic valve of the ink feeding bottle or the two-way electromagnetic valve of the ink returning bottle is closed, and ink continuously flows into the ink feeding safety buffer bottle or the ink returning safety buffer bottle, when the liquid level in the ink feeding safety buffer bottle reaches the height of the low liquid level floating ball of the ink feeding safety buffer bottle or the liquid level in the ink returning safety buffer bottle reaches the height of the low liquid level floating ball of the ink returning safety buffer bottle, the sensor controls the negative pressure system to be closed, so that the suction force generated by the negative pressure system is eliminated, the ink is prevented from further overflowing, and the second-layer protection is achieved.
Further, in the step 4, the third layer protection is performed through the high liquid level floating ball of the ink inlet safety buffer bottle and the high liquid level floating ball of the ink return safety buffer bottle, specifically as follows:
if the ink continues to overflow, when the liquid level in the ink feeding safety buffer bottle reaches the high liquid level floating ball height of the ink feeding safety buffer bottle or the liquid level in the ink returning safety buffer bottle reaches the high liquid level floating ball height of the ink returning safety buffer bottle, the sensor controls the two-way electromagnetic valve of the ink feeding safety buffer bottle or the two-way electromagnetic valve of the ink returning safety buffer bottle to be closed, so that the ink is prevented from entering the negative pressure system, and the third layer protection is achieved.
Compared with the prior art, the system has the remarkable advantages that (1) the system adopts three-level protection measures to prevent ink from quickly overflowing back into a negative pressure system due to equipment failure of a 3D ink-jet printing device, so that the safety risk of equipment is reduced, and the safety of the system is improved, and (2) the three-level protection measures are adopted to improve the reliability of protection and the running stability of the equipment.
Drawings
Fig. 1 is a block diagram of a three-level protection system for an ink path of a 3D inkjet printing apparatus according to the present invention.
Fig. 2 is a schematic flow chart of a three-level protection method for an ink path of a 3D inkjet printing apparatus according to the present invention.
Detailed Description
The invention provides an ink path three-stage protection system of a 3D ink jet printing device, which comprises a negative pressure system 1, a spray head 2, an ink inlet bottle 3, an ink return bottle 4, an ink inlet safety buffer bottle 5, an ink return safety buffer bottle 6, an ink inlet bottle normally-closed electromagnetic valve 7, an ink return bottle normally-closed electromagnetic valve 8, an ink inlet bottle two-way electromagnetic valve 9, an ink return bottle two-way electromagnetic valve 10, an ink return safety buffer bottle two-way electromagnetic valve 11, an ink inlet safety buffer bottle two-way electromagnetic valve 12, an ink return bottle ink pump 21, an ink inlet bottle ink pump 22, an ink return butterfly filter 23 and an ink inlet butterfly filter 24;
The ink inlet end of the ink inlet bottle 3 is connected with the ink inlet bottle ink pump 22, the front end of the ink inlet bottle ink pump 22 is provided with a one-way valve connected with the ink inlet butterfly filter 24, the lower end of the ink inlet bottle 3 is connected with the normally closed electromagnetic valve 7 of the ink inlet bottle and is connected with the spray head 2 through a pipeline, the upper end of the ink inlet bottle is connected with the two-way electromagnetic valve 9 of the ink inlet bottle, the two-way electromagnetic valve 9 of the ink inlet bottle is connected with the ink inlet of the ink inlet safety buffer bottle 5, the ink outlet of the ink inlet safety buffer bottle 5 is connected with the two-way electromagnetic valve 12 of the ink inlet safety buffer bottle, and the two-way electromagnetic valve 12 of the ink inlet safety buffer bottle is connected to the negative pressure system 1;
The ink return end of the ink return bottle 4 is connected with the ink return bottle ink pump 21, the ink return end of the ink return bottle ink pump 21 is provided with a one-way valve which is connected with the ink return butterfly filter 23, the lower end of the ink return bottle 4 is connected with the normally closed electromagnetic valve 8 of the ink return bottle and is connected with the spray head 2 through a pipeline, the upper end of the ink return bottle is connected with the two-way electromagnetic valve 10 of the ink return bottle, the two-way electromagnetic valve 10 of the ink return bottle is connected with the ink inlet of the ink return safety buffer bottle 6, the ink outlet of the ink return safety buffer bottle 6 is connected with the two-way electromagnetic valve 11 of the ink return safety buffer bottle, and the two-way electromagnetic valve 11 of the ink return safety buffer bottle is connected to the negative pressure system 1.
As a specific example, the ink bottle 3 is internally provided with an ink bottle low-level float ball 13 and an ink bottle high-level float ball 14, the ink bottle low-level float ball 13 is used for controlling the opening and closing of an ink bottle ink pump 22, and the ink bottle high-level float ball 14 is used for controlling the opening and closing of the two-way electromagnetic valve 9 of the ink bottle.
As a specific example, the ink return bottle 4 is internally provided with an ink return bottle low-level float ball 15 and an ink return bottle high-level float ball 16, the ink return bottle low-level float ball 15 is used for controlling the opening and closing of the ink return bottle ink pump 21, and the ink return bottle high-level float ball 16 is used for controlling the opening and closing of the ink return bottle two-way electromagnetic valve 10.
As a specific example, the ink feeding safety buffer bottle 5 is internally provided with an ink feeding safety buffer bottle low-level floating ball 19 and an ink feeding safety buffer bottle high-level floating ball 20, wherein the ink feeding safety buffer bottle low-level floating ball 19 is used for controlling the on-off of the negative pressure system 1, and the ink feeding safety buffer bottle high-level floating ball 20 is used for controlling the on-off of the two-way electromagnetic valve 12 of the ink feeding safety buffer bottle.
As a specific example, the ink return safety buffer bottle 6 is internally provided with an ink return safety buffer bottle low-level floating ball 17 and an ink return safety buffer bottle high-level floating ball 18, wherein the ink return safety buffer bottle low-level floating ball 17 is used for controlling the on-off of the negative pressure system 1, and the ink return safety buffer bottle high-level floating ball 18 is used for controlling the on-off of the two-way electromagnetic valve 11 of the ink return safety buffer bottle.
The invention also provides a three-level protection method for the ink path of the 3D ink-jet printing device, which is based on the three-level protection system for the ink path of the 3D ink-jet printing device and comprises the following steps:
step 1, after a negative pressure system 1 starts to work, generating suction force on residual ink in a spray head, and enabling the ink to enter an ink return bottle 4;
step 2, performing first-layer protection through an ink inlet bottle low-liquid-level floating ball 13, an ink inlet bottle high-liquid-level floating ball 14, an ink return bottle low-liquid-level floating ball 15 and an ink return bottle high-liquid-level floating ball 16;
Step 3, performing second-layer protection through an ink inlet safety buffer bottle low-liquid-level floating ball 19 and an ink return safety buffer bottle low-liquid-level floating ball 17;
And 4, performing third-layer protection through the high-liquid-level floating ball 20 of the ink inlet safety buffer bottle and the high-liquid-level floating ball 18 of the ink return safety buffer bottle.
As a specific example, in step 2, the first layer protection is performed by the ink bottle low level float ball 13, the ink bottle high level float ball 14, the ink bottle low level float ball 15 and the ink bottle high level float ball 16, specifically as follows:
When the liquid level in the ink feeding bottle 3 reaches the height of the low liquid level floating ball 13 of the ink feeding bottle or the liquid level in the ink returning bottle 4 reaches the height of the low liquid level floating ball 15 of the ink returning bottle, the sensor controls the ink feeding bottle ink pump 22 or the ink returning bottle ink pump 21 to be closed, and when the liquid level in the ink feeding bottle 3 reaches the height of the high liquid level floating ball 14 of the ink feeding bottle or the liquid level in the ink returning bottle 4 reaches the height of the high liquid level floating ball 16 of the ink returning bottle, the sensor controls the two-way electromagnetic valve 9 of the ink feeding bottle or the two-way electromagnetic valve 10 of the ink returning bottle to be closed, so that the ink is prevented from continuously overflowing back, and the first layer of protection is achieved.
As a specific example, in step 3, the second layer protection is performed by the ink inlet safety buffer bottle low level floating ball 19 and the ink return safety buffer bottle low level floating ball 17, which is specifically as follows:
when the ink feeding bottle is continuously in failure, the two-way electromagnetic valve 9 or the two-way electromagnetic valve 10 of the ink feeding bottle is closed, and ink can not be prevented from overflowing back, the ink continuously flows into the ink feeding safety buffer bottle 5 or the ink returning safety buffer bottle 6, when the liquid level in the ink feeding safety buffer bottle 5 reaches the height of the low liquid level floating ball 19 of the ink feeding safety buffer bottle or the liquid level in the ink returning safety buffer bottle 6 reaches the height of the low liquid level floating ball 17 of the ink returning safety buffer bottle, the sensor controls the negative pressure system 1 to be closed, so that the suction force generated by the negative pressure system 1 is eliminated, the ink is prevented from overflowing back further, and the second-layer protection is achieved.
As a specific example, in step 4, the third layer protection is performed by the ink inlet safety buffer bottle high level floating ball 20 and the ink return safety buffer bottle high level floating ball 18, which are specifically as follows:
If the ink continues to overflow, when the liquid level in the ink feeding safety buffer bottle 5 reaches the height of the high liquid level floating ball 20 of the ink feeding safety buffer bottle or the liquid level in the ink returning safety buffer bottle 6 reaches the height of the high liquid level floating ball 18 of the ink returning safety buffer bottle, the sensor controls the two-way electromagnetic valve 12 of the ink feeding safety buffer bottle or the two-way electromagnetic valve 11 of the ink returning safety buffer bottle to be closed, so that the ink is prevented from entering the negative pressure system 1, and the third layer protection is achieved.
The invention will now be described in further detail with reference to the drawings and to specific examples.
Examples
Referring to fig. 1, the present embodiment provides an ink path three-stage protection system of a 3D inkjet printing apparatus, including a negative pressure system 1, a nozzle 2, an ink inlet bottle 3, an ink return bottle 4, an ink inlet safety buffer bottle 5, an ink return safety buffer bottle 6, an ink inlet bottle normally-closed solenoid valve 7, an ink return bottle normally-closed solenoid valve 8, an ink inlet bottle two-way solenoid valve 9, an ink return bottle two-way solenoid valve 10, an ink return safety buffer bottle two-way solenoid valve 11, an ink inlet safety buffer bottle two-way solenoid valve 12, an ink return bottle ink pump 21, an ink inlet bottle ink pump 22, an ink return butterfly filter 23, and an ink inlet butterfly filter 24;
The ink inlet end of the ink inlet bottle 3 is connected with the ink inlet bottle ink pump 22, the front end of the ink inlet bottle ink pump 22 is provided with a one-way valve connected with the ink inlet butterfly filter 24, the lower end of the ink inlet bottle 3 is connected with the normally closed electromagnetic valve 7 of the ink inlet bottle and is connected with the spray head 2 through a pipeline, the upper end of the ink inlet bottle is connected with the two-way electromagnetic valve 9 of the ink inlet bottle, the two-way electromagnetic valve 9 of the ink inlet bottle is connected with the ink inlet of the ink inlet safety buffer bottle 5, the ink outlet of the ink inlet safety buffer bottle 5 is connected with the two-way electromagnetic valve 12 of the ink inlet safety buffer bottle, and the two-way electromagnetic valve 12 of the ink inlet safety buffer bottle is connected to the negative pressure system 1;
The ink return end of the ink return bottle 4 is connected with the ink return bottle ink pump 21, the ink return end of the ink return bottle ink pump 21 is provided with a one-way valve which is connected with the ink return butterfly filter 23, the lower end of the ink return bottle 4 is connected with the normally closed electromagnetic valve 8 of the ink return bottle and is connected with the spray head 2 through a pipeline, the upper end of the ink return bottle is connected with the two-way electromagnetic valve 10 of the ink return bottle, the two-way electromagnetic valve 10 of the ink return bottle is connected with the ink inlet of the ink return safety buffer bottle 6, the ink outlet of the ink return safety buffer bottle 6 is connected with the two-way electromagnetic valve 11 of the ink return safety buffer bottle, and the two-way electromagnetic valve 11 of the ink return safety buffer bottle is connected to the negative pressure system 1.
Further, an ink feeding bottle low-level floating ball 13 and an ink feeding bottle high-level floating ball 14 are arranged in the ink feeding bottle 3, the ink feeding bottle low-level floating ball 13 is used for controlling the opening and closing of an ink feeding bottle ink pump 22, and the ink feeding bottle high-level floating ball 14 is used for controlling the opening and closing of the two-way electromagnetic valve 9 of the ink feeding bottle.
Further, a low ink level floating ball 15 and a high ink level floating ball 16 are arranged in the ink return bottle 4, the low ink level floating ball 15 is used for controlling the opening and closing of an ink pump 21 of the ink return bottle, and the high ink level floating ball 16 is used for controlling the opening and closing of the two-way electromagnetic valve 10 of the ink return bottle.
Further, an ink inlet safety buffer bottle low liquid level floating ball 19 and an ink inlet safety buffer bottle high liquid level floating ball 20 are arranged in the ink inlet safety buffer bottle 5, the ink inlet safety buffer bottle low liquid level floating ball 19 is used for controlling the on-off of the negative pressure system 1, and the ink inlet safety buffer bottle high liquid level floating ball 20 is used for controlling the on-off of the two-way electromagnetic valve 12 of the ink inlet safety buffer bottle.
Further, an ink return safety buffer bottle low liquid level floating ball 17 and an ink return safety buffer bottle high liquid level floating ball 18 are arranged in the ink return safety buffer bottle 6, the ink return safety buffer bottle low liquid level floating ball 17 is used for controlling the on-off of the negative pressure system 1, and the ink return safety buffer bottle high liquid level floating ball 18 is used for controlling the on-off of the two-way electromagnetic valve 11 of the ink return safety buffer bottle.
With reference to fig. 2, this embodiment further provides a three-level protection method for an ink path of a 3D inkjet printing apparatus, including the following steps:
step 1, after a negative pressure system 1 starts to work, generating suction force on residual ink in a spray head, and enabling the ink to enter an ink return bottle 4;
step 2, when the liquid level in the ink feeding bottle 3 reaches the height of the ink feeding bottle low liquid level floating ball 13 or the liquid level in the ink returning bottle 4 reaches the height of the ink returning bottle low liquid level floating ball 15, the sensor controls the ink feeding bottle ink pump 22 or the ink returning bottle ink pump 21 to be closed, and when the liquid level in the ink feeding bottle 3 reaches the height of the ink feeding bottle high liquid level floating ball 14 or the liquid level in the ink returning bottle 4 reaches the height of the ink returning bottle high liquid level floating ball 16, the sensor controls the two-way electromagnetic valve 9 of the ink feeding bottle or the two-way electromagnetic valve 10 of the ink returning bottle to be closed, so that the ink is prevented from continuously overflowing, and the first layer of protection is achieved;
Step 3, when the continuous faults occur, the two-way electromagnetic valve 9 of the ink feeding bottle or the two-way electromagnetic valve 10 of the ink returning bottle cannot prevent the ink from overflowing, the ink continuously flows into the ink feeding safety buffer bottle 5 or the ink returning safety buffer bottle 6, when the liquid level in the ink feeding safety buffer bottle 5 reaches the height of the low liquid level floating ball 19 of the ink feeding safety buffer bottle or the liquid level in the ink returning safety buffer bottle 6 reaches the height of the low liquid level floating ball 17 of the ink returning safety buffer bottle, the sensor controls the negative pressure system 1 to be closed, so that the suction force generated by the negative pressure system 1 disappears, the ink is prevented from overflowing further, and the second layer of protection is achieved;
And 4, if the ink continuously overflows, when the liquid level in the ink feeding safety buffer bottle 5 reaches the height of the high liquid level floating ball 20 of the ink feeding safety buffer bottle or the liquid level in the ink returning safety buffer bottle 6 reaches the height of the high liquid level floating ball 18 of the ink returning safety buffer bottle, the sensor controls the two-way electromagnetic valve 12 of the ink feeding safety buffer bottle or the two-way electromagnetic valve 11 of the ink returning safety buffer bottle to be closed, so that the ink is prevented from entering the negative pressure system 1, and the third layer protection is achieved.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (5)

1. The three-level protection system for the ink path of the 3D ink jet printing device is characterized by comprising a negative pressure system (1), a spray head (2), an ink feeding bottle (3), an ink returning bottle (4), an ink feeding safety buffer bottle (5), an ink returning safety buffer bottle (6), an ink feeding bottle normally-closed electromagnetic valve (7), an ink returning bottle normally-closed electromagnetic valve (8), an ink feeding bottle two-way electromagnetic valve (9), an ink returning bottle two-way electromagnetic valve (10), an ink returning safety buffer bottle two-way electromagnetic valve (11), an ink feeding safety buffer bottle two-way electromagnetic valve (12), an ink returning bottle ink pump (21), an ink feeding bottle ink pump (22), an ink returning butterfly filter (23) and an ink feeding butterfly filter (24);
The ink inlet end of the ink inlet bottle (3) is connected with an ink inlet bottle ink pump (22), a one-way valve is arranged at the front end of the ink inlet bottle ink pump (22) and is connected with an ink inlet butterfly filter (24), the lower end of the ink inlet bottle (3) is connected with an ink inlet bottle normally-closed electromagnetic valve (7) and is connected with a spray head (2) through a pipeline, the upper end of the ink inlet bottle is connected with an ink inlet of an ink inlet bottle two-way electromagnetic valve (9), the ink inlet bottle two-way electromagnetic valve (9) is connected with an ink inlet of an ink inlet safety buffer bottle (5), an ink outlet of the ink inlet safety buffer bottle (5) is connected with an ink inlet safety buffer bottle two-way electromagnetic valve (12), and the ink inlet safety buffer bottle two-way electromagnetic valve (12) is connected to a negative pressure system (1);
The ink return end of the ink return bottle (4) is connected with an ink return bottle ink pump (21), the ink return end of the ink return bottle ink pump (21) is provided with a one-way valve which is connected with an ink return butterfly filter (23), the lower end of the ink return bottle (4) is connected with a normally closed electromagnetic valve (8) of the ink return bottle and is connected with a spray head (2) through a pipeline, the upper end of the ink return bottle is connected with a two-way electromagnetic valve (10) of the ink return bottle, the two-way electromagnetic valve (10) of the ink return bottle is connected with an ink inlet of an ink return safety buffer bottle (6), an ink outlet of the ink return safety buffer bottle (6) is connected with a two-way electromagnetic valve (11) of the ink return safety buffer bottle, and the two-way electromagnetic valve (11) of the ink return safety buffer bottle is connected to a negative pressure system (1);
An ink bottle low-liquid-level floating ball (13) and an ink bottle high-liquid-level floating ball (14) are arranged in the ink bottle (3), the ink bottle low-liquid-level floating ball (13) is used for controlling the opening and closing of an ink bottle ink pump (22), and the ink bottle high-liquid-level floating ball (14) is used for controlling the opening and closing of an ink bottle two-way electromagnetic valve (9);
The ink return bottle (4) is internally provided with an ink return bottle low-liquid-level floating ball (15) and an ink return bottle high-liquid-level floating ball (16), the ink return bottle low-liquid-level floating ball (15) is used for controlling the opening and closing of an ink return bottle ink pump (21), and the ink return bottle high-liquid-level floating ball (16) is used for controlling the opening and closing of a two-way electromagnetic valve (10) of the ink return bottle;
The ink feeding safety buffer bottle (5) is internally provided with an ink feeding safety buffer bottle low-liquid-level floating ball (19) and an ink feeding safety buffer bottle high-liquid-level floating ball (20), wherein the ink feeding safety buffer bottle low-liquid-level floating ball (19) is used for controlling the switch of the negative pressure system (1), and the ink feeding safety buffer bottle high-liquid-level floating ball (20) is used for controlling the opening and closing of the two-way electromagnetic valve (12) of the ink feeding safety buffer bottle;
the ink return safety buffer bottle (6) is internally provided with an ink return safety buffer bottle low-liquid-level floating ball (17) and an ink return safety buffer bottle high-liquid-level floating ball (18), the ink return safety buffer bottle low-liquid-level floating ball (17) is used for controlling the switch of the negative pressure system (1), and the ink return safety buffer bottle high-liquid-level floating ball (18) is used for controlling the opening and closing of the two-way electromagnetic valve (11) of the ink return safety buffer bottle.
2. A three-level protection method for an ink path of a 3D inkjet printing apparatus, wherein the method is based on the three-level protection system for an ink path of a 3D inkjet printing apparatus according to claim 1, and comprises the steps of:
step 1, after a negative pressure system (1) starts to work, generating suction force on residual ink in a spray head, and enabling the ink to enter an ink return bottle (4);
step 2, performing first-layer protection through an ink inlet bottle low-liquid-level floating ball (13), an ink inlet bottle high-liquid-level floating ball (14), an ink return bottle low-liquid-level floating ball (15) and an ink return bottle high-liquid-level floating ball (16);
Step 3, performing second-layer protection through an ink inlet safety buffer bottle low-liquid-level floating ball (19) and an ink return safety buffer bottle low-liquid-level floating ball (17);
And 4, performing third-layer protection through the high-liquid-level floating ball (20) of the ink inlet safety buffer bottle and the high-liquid-level floating ball (18) of the ink return safety buffer bottle.
3. The three-level protection method for the ink path of the 3D inkjet printing apparatus according to claim 2, wherein in step 2, the first-layer protection is performed by an ink bottle low-level float ball (13), an ink bottle high-level float ball (14), an ink bottle low-level float ball (15) and an ink bottle high-level float ball (16), specifically as follows:
When the liquid level in the ink feeding bottle (3) reaches the height of the ink feeding bottle low liquid level floating ball (13) or the liquid level in the ink returning bottle (4) reaches the height of the ink returning bottle low liquid level floating ball (15), the sensor controls the ink feeding bottle ink pump (22) or the ink returning bottle ink pump (21) to be closed, and when the liquid level in the ink feeding bottle (3) reaches the height of the ink feeding bottle high liquid level floating ball (14) or the liquid level in the ink returning bottle (4) reaches the height of the ink returning bottle high liquid level floating ball (16), the sensor controls the two-way electromagnetic valve (9) or the two-way electromagnetic valve (10) of the ink returning bottle to be closed, ink is prevented from continuing to overflow, and the first layer of protection is achieved.
4. The three-level protection method for the ink path of the 3D inkjet printing device according to claim 2, wherein in step 3, the second-level protection is performed by an ink-feeding safety buffer bottle low-level floating ball (19) and an ink-returning safety buffer bottle low-level floating ball (17), specifically as follows:
When the ink feeding bottle is continuously failed, the two-way electromagnetic valve (9) or the two-way electromagnetic valve (10) of the ink returning bottle is closed, and ink continuously flows into the ink feeding safety buffer bottle (5) or the ink returning safety buffer bottle (6), when the liquid level in the ink feeding safety buffer bottle (5) reaches the height of the low liquid level floating ball (19) of the ink feeding safety buffer bottle or the liquid level in the ink returning safety buffer bottle (6) reaches the height of the low liquid level floating ball (17) of the ink returning safety buffer bottle, the sensor controls the negative pressure system (1) to be closed, so that the suction force generated by the negative pressure system (1) disappears, the ink is prevented from further overflowing back, and the second-layer protection is achieved.
5. The three-level protection method for the ink path of the 3D inkjet printing device according to claim 2, wherein in step 4, the third-level protection is performed by an ink-feeding safety buffer bottle high-level floating ball (20) and an ink-returning safety buffer bottle high-level floating ball (18), specifically as follows:
If ink continues to overflow, when the liquid level in the ink feeding safety buffer bottle (5) reaches the height of the high liquid level floating ball (20) of the ink feeding safety buffer bottle or the liquid level in the ink returning safety buffer bottle (6) reaches the height of the high liquid level floating ball (18) of the ink returning safety buffer bottle, the sensor controls the two-way electromagnetic valve (12) of the ink feeding safety buffer bottle or the two-way electromagnetic valve (11) of the ink returning safety buffer bottle to be closed, so that the ink is prevented from entering the negative pressure system (1) and the third layer of protection is achieved.
CN202311838157.7A 2023-12-28 2023-12-28 A three-level ink path protection system and method for a 3D inkjet printer Active CN117621668B (en)

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CN211684118U (en) * 2019-12-19 2020-10-16 天津长荣数码科技有限公司 A second grade ink horn structure for ink jet numbering machine

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