CN114905858A - Continuous ink jet printer cleaning and solvent adding pipeline system and method - Google Patents

Abstract

The present application relates to a continuous ink jet printer cleaning and solvent adding pipeline system and a method thereof, comprising a cleaning metering pump, a power diaphragm is arranged in the cleaning metering pump, and the power diaphragm separates the cleaning metering pump into two independent The closed chamber: solvent storage chamber and power chamber; the upper part of the solvent storage chamber is provided with a liquid level switch; the top of the solvent storage chamber is communicated with the solvent bottle through valve V1; the solvent storage chamber is connected with the nozzle cleaning pipe through valve V2 The bottom of the solvent storage chamber is also connected to the top of the ink mixing cylinder through valve V5; the power chamber is connected to the positive pressure part of the pipeline through valve V3, and the bottom of the power chamber is connected to the negative pressure part of the pipeline through valve V4. The application reduces the amount of pumps and valves, simplifies the pipeline structure, integrates the functions of pipeline cleaning, adding consumables, accurately controlling the metering, and judging whether the consumable bottle is exhausted, shortening the assembly time, improving production efficiency and quality stability .

Description

Continuous ink jet printer cleaning and solvent adding pipeline system and method

technical field

The present application relates to the field of continuous ink jet printers, and in particular to a continuous ink jet printer cleaning and solvent addition pipeline system and method thereof.

Background technique

Due to its own functional needs, the continuous ink jet printer integrates many functional sub-pipeline systems for different purposes, such as consumables adding circuit, metering circuit, printing circuit, recovery circuit and shutdown cleaning circuit. In order to achieve its own predetermined function, each sub-circuit often needs an independent power element "pump" and a fluid on-off control element "valve".

Referring to Figure 1, the metering chamber with the liquid level float and the diaphragm pump are designed with a completely independent structure. The top of the metering chamber is connected to the negative pressure end of the Venturi through the valve V4, so that the negative pressure in the metering chamber can be controlled. The solvent box is connected to the bottom of the metering chamber through valve V1, so as to realize the controllable extraction and metering of the solvent. Then through another three-way valve V7, one end of the diaphragm pump power chamber is selectively connected to the main pump ink outlet (referred to as the positive pressure end) or the ink inlet (referred to as the negative pressure end), so as to realize the control of the diaphragm pump. Push or pull of the inner diaphragm. The diaphragm pump is close to one end of the one-way valve. The inlet end of the one-way valve is connected to the bottom of the metering chamber to extract the solvent that has been sucked in by the negative pressure of the venturi, and the outlet end of the one-way valve is connected to the nozzle that needs to be cleaned. This is to achieve the cleaning of the nozzle. The addition of the solvent is realized by direct extraction from the bottom of the metering chamber through Venturi negative pressure or an independent addition pump, and an independent valve V5 is required to control the specific addition amount of the solvent. A total of 4 2-way valves, 1 3-way valve, 2 single-way valves and 1 diaphragm pump are required.

In this way, the entire ink circuit system has many pumps and valves for different purposes, which directly increases the difficulty of component layout, the difficulty of production and assembly, pushes up the product cost and reduces the overall reliability of the product. Therefore, it is not conducive to large-scale, mass production and product popularization, and a highly refined pipeline system with a small number of components and high production efficiency and reliability is urgently needed.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the present application provides a continuous ink jet printer cleaning and solvent adding pipeline system and method.

On the one hand, the continuous ink jet printer cleaning and solvent adding pipeline system provided by this application adopts the following technical solutions:

A continuous ink jet printer cleaning and solvent adding pipeline system, including a cleaning metering pump, which is provided with a dynamic diaphragm, which divides the cleaning metering pump into two independent closed chambers Chamber: solvent storage chamber and power chamber; the upper part of the solvent storage chamber is provided with a liquid level switch; the top of the solvent storage chamber communicates with the solvent bottle through valve V1; the solvent storage chamber passes through valve V2 Connected to the nozzle cleaning pipeline, the solvent storage chamber is also connected to the top of the ink mixing cylinder through the valve V5; the bottom of the power chamber is connected to the positive pressure part of the pipeline through the valve V3, and the bottom of the power chamber Valve V4 is connected to the negative pressure part of the pipeline.

By adopting the above technical solution, the dynamic diaphragm in the power chamber is connected to the positive pressure part of the pipeline and the negative pressure part of the pipeline respectively through different valves to realize the movement of the dynamic diaphragm; and then combined with the valve V1 communicated with the solvent bottle to realize The pumping of the liquid in the solvent bottle; the cleaning of the pipeline is realized by combining the valve V2 connected with the nozzle cleaning pipeline; and the valve V5 connected with the top of the ink mixing tank to realize the operation of pumping the solvent into the ink mixing tank, and using the liquid level The switch realizes the detection of the liquid level in the cleaning metering pump, thereby realizing the cleaning and solvent addition of the continuous ink jet printer; the device reduces the number of valves and pumps, simplifies the structure, simplifies the equipment, and improves the stability of the system. reliability.

Preferably, the solvent storage chamber is provided with a mold dome recessed toward itself to limit the deformation range of the dynamic diaphragm, and a gap for the solvent to pass through is formed on the mold dome.

By adopting the above technical solutions, the mold dome is used to limit the maximum deformation volume of the dynamic diaphragm when it receives positive pressure, which is beneficial to protect the dynamic diaphragm and limit the volume of liquid pumped each time; the gap is conveniently located in the liquid in the mold dome. of discharge.

Preferably, the power chamber is provided with a mold plate bottom bracket that is recessed toward itself, and the mold plate bottom bracket is communicated with the outside of the cleaning metering pump through a pipeline, and is connected with the valve V3 and the valve V4. connected.

By adopting the above technical solution, the bottom bracket of the mold half is used to limit the maximum deformation volume of the dynamic diaphragm when it receives negative pressure, which is beneficial to protect the dynamic diaphragm.

Preferably, the mold half dome and the mold half bottom bracket are symmetrically arranged relative to the dynamic diaphragm.

By adopting the above technical solution, the symmetrical arrangement can make the deformation of the dynamic diaphragm consistent after receiving positive pressure and negative pressure, which is beneficial to make the volume of liquid pumped in or out by the cleaning metering pump the same each time.

Preferably, the mold half dome is configured as a smooth and symmetrical spherical structure.

By adopting the above technical solution, the smooth and symmetrical die dome with spherical structure is beneficial to protect the dynamic diaphragm, thereby prolonging the service life.

Preferably, the mold half bottom bracket is configured as a smooth and symmetrical spherical structure.

By adopting the above-mentioned technical solution, the smooth and symmetrical mold base with spherical structure is beneficial to protect the dynamic diaphragm, thereby prolonging the service life.

On the other hand, the continuous ink jet coder cleaning and solvent addition method provided by this application uses the above-mentioned continuous ink jet coder cleaning and solvent addition pipeline system, and adopts the following technical solutions:

Continuous ink jet printer cleaning and solvent addition method: including solvent addition steps and nozzle cleaning steps:

The steps for adding solvent are as follows:

The first step is to fill the solvent storage chamber; the process is as follows: open the valve V1, close the valve V5 and the valve V2; close the valve V3, open the valve V4 for a certain time Δt1 to the power diaphragm Under the action of negative pressure, it is closely attached to the mold base, a certain negative pressure is formed inside the solvent storage chamber, and a certain volume of solvent in the solvent bottle enters the solvent storage chamber; close the valve V4, open the valve V3 for a certain time Δt2 until the dynamic diaphragm is pressed against the die dome under the action of positive pressure; repeat the opening and closing of the valve V3 and valve V4 until the liquid level switch detects the liquid position signal, and close the valve V3 for the last time, open the valve V4 for a certain time Δt3 until the power diaphragm is pressed against the mold plate under the action of negative pressure, and close the valve V1 and all said valve V4;

The second step is to push the solvent in the solvent storage chamber to the ink mixing tank; the process is as follows: after completing the first step, close the valve V1, the valve V2 and the valve V4; open the valve V5 and the valve V3 for a certain time Δt4 until the solvent in the solvent storage chamber enters the ink mixing cylinder under the push of the dynamic diaphragm, and the dynamic diaphragm is pressed against the mold dome under the action of positive pressure. This time The amount of solvent added is equal to the sum of the capacity of the solvent storage chamber and the power chamber, and one solvent addition is completed and accurately measured;

Repeat the first and second steps above to achieve the required solvent addition and accurate measurement;

The nozzle cleaning steps are as follows:

The first step, filling the solvent storage chamber, the step is the same as the first step in the step of adding solvent;

The second step is to push the solvent in the solvent storage chamber to the nozzle. The process is as follows:

After completing the first step of filling the solvent storage chamber, close the valve V1, the valve V4 and the valve V5; open the valve V2 and the valve V3 for a certain time Δt6 to make a certain amount of solvent in the dynamic membrane Under the push of the sheet, it enters the nozzle cleaning pipeline to complete a nozzle cleaning;

The first and second steps above are performed reciprocally to achieve continuous scouring and cleaning of the nozzle.

By adopting the above technical solution, the solvent is first pumped into the cleaning metering pump, then the solvent is pumped into the ink mixing tank, and finally the solvent is driven by the power diaphragm into the nozzle cleaning pipeline by the switch of the valve to complete the nozzle cleaning. ;Add a quantitative amount of solvent each time according to the actual situation of the program and pipeline. Repeated execution can achieve controlled amount addition; Reduce the amount of complicated pumps and valves, simple operation, improve production efficiency and quality stability, suitable for industrial production and application .

Preferably, in the step of filling the solvent storage chamber, if the opening and closing of the valve V3 and the valve V4 are repeated X times, and the liquid level switch still does not detect a liquid level signal, it is determined that the solvent The bottle is empty; and close the valve V3 for the last time, open the valve V4 for a certain time Δt8 until the power diaphragm is pressed against the mold plate under the action of negative pressure, and close the valve V1 and the valve V4.

By adopting the above technical solution, in the process of pumping the solvent into the storage chamber, the method can detect whether there is still solvent in the solvent bottle.

In summary, the present application includes beneficial technical effects: reducing the amount of pumps and valves, simplifying the pipeline structure, shortening assembly man-hours, improving production efficiency and quality stability; integrating pipeline cleaning, consumables addition and accurate Control metering and determine whether the consumable bottle is exhausted and other functions.

Description of drawings

Fig. 1 is the device diagram of the pipeline system of nozzle cleaning of ink jet coder and solvent addition and metering in the related art;

FIG. 2 is a device diagram of the cleaning and solvent adding pipeline system of the continuous ink jet printer of the present application.

Reference numerals: 1, cleaning metering pump; 1-1, solvent injection interface; 1-2, solvent cleaning interface; 1-3, solvent addition interface; 1-4, power diaphragm; 1-5, solvent storage chamber ;1-6, power chamber; 1-7, mold dome; 1-8, mold bottom support; 1-9, gap; 2, liquid level switch; 3-1, pipeline positive pressure interface; 3- 2. Negative pressure interface of pipeline; 4. Solvent bottle; 5. Ink mixing tank; 6. Nozzle cleaning pipeline interface.

Detailed ways

The present application will be described in further detail below in conjunction with FIG. 2 .

The embodiment of the present application discloses a continuous ink jet printer cleaning and solvent adding pipeline system. Referring to FIG. 2 , the continuous ink jet printer cleaning and solvent adding pipeline system includes a cleaning metering pump 1 . The cleaning metering pump 1 is provided with a power diaphragm 1-4. The power diaphragm 1-4 divides the cleaning metering pump 1 into two independent closed chambers: the solvent storage chamber 1-5 at the top and the solvent storage chamber at the top. Power chambers 1-6 at the bottom. The upper part of the solvent storage chambers 1-5 is integrated with a liquid level switch 2 for measuring and detecting liquid level changes. The top of the solvent storage chamber 1-5 is provided with a solvent injection port 1-1, and the solvent injection port 1-1 communicates with the solvent bottle 4 through a valve V1. The solvent storage chamber 1-5 is provided with a solvent cleaning interface 1-2 on the bottom side. The solvent cleaning interface 1-2 is connected to a nozzle cleaning pipeline interface 6 through the valve V2. The nozzle cleaning pipeline interface 6 is used for connecting with the nozzle cleaning pipe. The other side is provided with a solvent addition interface 1-3, and the solvent addition interface 1-3 is connected to the top of the ink mixing tank 5 through a valve V5. The bottom of the power chamber 1-6 is connected with the pipeline positive pressure interface 3-1 through the valve V3, and the pipeline positive pressure interface 3-1 is connected with the pipeline positive pressure part; the bottom of the power chamber 1-6 is connected through the valve V4 A pipeline negative pressure interface 3-2 is connected, and the pipeline negative pressure interface 3-2 is connected with the pipeline negative pressure part.

Wherein, the valve V3 and the valve V4 may be independent control valves, and the valve V3 and the valve V4 may also be a two-position three-way valve.

In addition, regarding the interface between the solvent storage chamber 1-5 and the valve V1, in addition to being installed at the bottom of the solvent storage chamber 1-5, it can also be a set position above the bottom and the interface leads to the solvent storage chamber 1-5 The tube at the top of the tube communicates with the solvent bottle 4.

Similarly, the valve V2 can be installed at the top of the solvent storage chamber 1-5 or a set position below the top, and the pipe leading to the bottom of the solvent storage chamber 1-5 at the interface is connected to the nozzle cleaning pipeline interface 6;

Similarly, the valve V5 can be installed at the top of the solvent storage chamber 1-5 or a set position below the top, and the pipe leading to the bottom of the solvent storage chamber 1-5 at the interface is connected to the top of the ink mixing cylinder 5;

Among them, in order to limit the limit position of the deformation of the power diaphragm 1-4, the lower part of the solvent storage chamber 1-5 protrudes toward the direction away from the power chamber 1-6 to form a mold half dome 1-7; at the same time, the mold half dome 1-7 There are gaps 1-9 at different intervals on it to allow the solvent to pass normally. Similarly, the top of the power chamber 1-6 is protruded toward the direction away from the solvent storage chamber 1-5 to form a mold half bottom bracket 1-8, and the mold half bottom bracket 1-8 is communicated to the power chamber 1 through a pipeline Bottom of -6, connected with valve V3 and valve V4. The mold half dome 1-7 and the mold half bottom bracket 1-8 are symmetrically arranged relative to the flat dynamic diaphragm 1-4, so that the dynamic diaphragm 1-4 has the same deformation amplitude under positive pressure and negative pressure. The mold half dome 1-7 and the mold half bottom bracket 1-8 are set as smooth and symmetrical spherical structures. The smooth, symmetrical and spherical structure is beneficial to protect the dynamic diaphragms 1-4, thereby prolonging the service life. In this embodiment, the liquid level switch 2 is configured as a liquid level float.

The working principle of the continuous ink jet printer cleaning and solvent adding pipeline system: the movement of the power diaphragms 1-4 in the power chambers 1-6 is realized through the control valve V3 and the valve V4; the solvent bottle 4 is realized through the control valve V1 The pumping of the inner liquid; the cleaning of the pipeline through the valve V2; the operation of pumping the solvent into the ink mixing tank 5 through the valve V5; in this process, the liquid level switch 2 is used to realize the detection of the liquid level in the cleaning metering pump 1, thereby Realize the cleaning and solvent addition of the continuous ink jet printer; the device reduces the number of valves and pumps, simplifies the structure, simplifies the equipment, and improves the stability and reliability of the system. The embodiment of the present application discloses a continuous ink jet printer cleaning and solvent adding method. The method includes a solvent adding step and a nozzle cleaning step:

1) The steps for adding solvent are as follows:

In the first step, the solvent storage chambers 1-5 are filled; the process is as follows: open valve V1, close valve V5 and valve V2. Close the valve V3, open the valve V4 for a certain time Δt1, the power diaphragm 1-4 is pressed against the mold plate bottom bracket 1-8 under the action of negative pressure, a certain negative pressure is formed inside the solvent storage chamber 1-5, and the solvent bottle 4 A certain amount of solvent enters the solvent storage chamber 1-5; close the valve V4, open the valve V3 for a certain time Δt2, the dynamic diaphragm 1-4 is pressed against the mold dome of the solvent storage chamber 1-5 under the action of positive pressure 1-7. Repeat the opening and closing actions of valve V3 and valve V4 until the float switch detects the liquid level signal, evacuates the air that may exist in solvent chambers 1-5, and ensures that the chamber is filled; and close valve V3 for the last time, The valve V4 is opened for a certain time Δt3, so that the power diaphragm 1-4 is pressed against the bottom bracket 1-8 of the die under the action of negative pressure, and the valve V1 and the valve V4 are closed. If the opening and closing of valve V3 and valve V4 are repeated X times, X is an integer greater than or equal to 1, and the float switch still does not detect the liquid level signal, it can be determined that the solvent bottle 4 is empty, and the last execution of closing valve V3 and opening the valve V4 has a certain time Δt8, so that the power diaphragm 1-4 is pressed against the mold plate bottom bracket 1-8 under the action of negative pressure, and the valve V1 and the valve V4 are closed.

The second step is to push the solvent in the solvent storage chambers 1-5 to the ink mixing tank 5; the process is as follows:

After completing the first step, close the valve V1, valve V2 and valve V4; open the valve V5 and valve V3 for a certain time Δt4 until the solvent in the solvent storage chamber 1-5 enters the ink mixing cylinder under the push of the power diaphragm 1-4 5. The power diaphragm 1-4 is pressed against the mold dome 1-7 under the action of positive pressure. The amount of solvent added this time is equal to the sum of the capacities of the solvent storage chamber 1-5 and the power chamber 1-6, and it is completed once Solvent is added and accurately metered, and the metering can be performed N times of solvent push each time the solvent is added according to the actual situation of the program and pipeline.

Repeat the first and second steps above to achieve the required solvent addition and accurate metering.

2) The nozzle cleaning steps are as follows:

The first step, filling the solvent storage chambers 1-5, is the same as the first step in the step of 1) adding the solvent.

The second step is to push the solvent in the solvent storage chambers 1-5 to the nozzle. The process is as follows:

After completing the first step to fill the solvent storage chambers 1-5, close the valve V1, valve V4 and valve V5; open the valve V2 and valve V3 for a certain time Δt6 to make a certain amount of solvent enter the nozzle under the push of the power diaphragm 1-4 Clean the pipeline and complete a nozzle cleaning action. According to the program and the actual situation of the pipeline, M cleaning actions need to be performed for each nozzle cleaning. If the liquid level switch 2 fails to detect the liquid level signal during this process, it can be determined that the solvent bottle 4 is empty.

The first and second steps above are performed reciprocally to achieve continuous scouring and cleaning of the nozzle.

The working principle of the embodiment of the present application is as follows: first, the solvent is pumped into the cleaning metering pump 1, then the solvent is pumped into the ink mixing cylinder 5, and finally the solvent is driven by the power diaphragm 1-4 by using the valve switch. Nozzle cleaning pipeline, complete nozzle cleaning.

The advantages of the embodiments of the present application are: the consumption of complicated pumps and valves is reduced, the operation is simple, the precise quantitative control is improved, the production efficiency and quality stability are improved, and it is suitable for industrial production and application.

The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore: all equivalent changes made according to the structure, shape and principle of the present application should be covered within the scope of the present application. Inside.

Claims (8)

1. A continuous ink jet printer cleaning and solvent adding pipeline system, characterized in that it comprises a cleaning metering pump (1), and a power diaphragm (1-4) is provided in the cleaning metering pump (1), and the The power diaphragm (1-4) divides the cleaning metering pump (1) into two independent closed chambers: a solvent storage chamber (1-5) and a power chamber (1-6); the solvent storage chamber (1-6) The upper part of the chamber (1-5) is provided with a liquid level switch (2); the top of the solvent storage chamber (1-5) is communicated with the solvent bottle (4) through the valve V1; the solvent storage chamber (1) -5) Connected with the nozzle cleaning pipeline through valve V2, the solvent storage chamber (1-5) is also connected with the top of the ink mixing cylinder (5) through valve V5; the power chamber (1-6) is connected through the valve V3 is connected to the positive pressure part of the pipeline, and the power chamber (1-6) is connected to the negative pressure part of the pipeline through the valve V4. 2. The continuous ink jet printer cleaning and solvent adding pipeline system according to claim 1, characterized in that: the solvent storage chamber (1-5) is provided with a mold dome ( 1-7), for limiting the deformation range of the dynamic diaphragm (1-4), and a gap (1-9) for the solvent to pass through is opened on the mold half dome (1-7). 3. The continuous ink jet printer cleaning and solvent adding pipeline system according to claim 2, characterized in that: the power chamber (1-6) is provided with a mold bottom bracket ( 1-8), and the mold plate bottom bracket (1-8) is connected to the outside of the cleaning metering pump (1) through a pipeline, and is connected to the valve V3 and the valve V4. 4. The continuous ink jet printer cleaning and solvent adding pipeline system according to claim 3, characterized in that: the mold half dome (1-7) is opposite to the mold half bottom bracket (1-8) Symmetrically arranged on the power diaphragm (1-4). 5. The continuous ink jet printer cleaning and solvent adding pipeline system according to claim 4, characterized in that: the die dome (1-7) is set as a smooth and symmetrical spherical structure. 6 . The continuous ink jet printer cleaning and solvent adding pipeline system according to claim 4 , characterized in that: the mold base support ( 1 - 8 ) is provided with a smooth and symmetrical spherical structure. 7 . 7. Continuous ink jet coder cleaning and solvent adding method, using the continuous ink jet coder cleaning and solvent adding pipeline system as described in any one of claims 1-6, it is characterized in that: comprising adding solvent step and Nozzle cleaning steps: The steps for adding solvent are as follows: The first step is to fill the solvent storage chamber (1-5); the process is as follows: open the valve V1, close the valve V5 and the valve V2; close the valve V3, open the valve V4 for a certain time Δt1 to Under the action of negative pressure, the dynamic diaphragm (1-4) is closely attached to the mold bottom bracket (1-8), and a certain negative pressure is formed inside the solvent storage chamber (1-5). A certain volume of solvent in the solvent bottle (4) enters the solvent storage chamber (1-5); the valve V4 is closed, and the valve V3 is opened for a certain time Δt2 until the power diaphragm (1-4) is at Under the action of positive pressure, close to the mold dome (1-7); repeat the opening and closing actions of valve V3 and valve V4 until the liquid level switch (2) detects the liquid level signal, and performs the closing operation for the last time. The valve V3 is opened, the valve V4 is opened for a certain period of time Δt3 until the dynamic diaphragm (1-4) is pressed against the mold plate bottom bracket (1-8) under the action of negative pressure, and the valve V1 and the valve are closed. the valve V4; The second step is to push the solvent in the solvent storage chamber (1-5) to the ink mixing tank (5); the process is as follows: After completing the first step, close the valve V1, the valve V2 and the valve V4; open the valve V5 and the valve V3 for a certain time Δt4 to the solvent in the solvent storage chamber (1-5) The dynamic diaphragm (1-4) enters the ink mixing cylinder (5) under the push of the dynamic diaphragm (1-4), and the dynamic diaphragm (1-4) is pressed against the die dome (1-4) under the action of positive pressure. 7), the amount of solvent added this time is equal to the sum of the capacities of the solvent storage chamber (1-5) and the power chamber (1-6), completing one solvent addition and accurately measuring; Repeat the first and second steps above to achieve the required solvent addition and accurate measurement; The nozzle cleaning steps are as follows: The first step, filling the solvent storage chamber (1-5), the steps are the same as the first step in the step of adding solvent; The second step is to push the solvent in the solvent storage chamber (1-5) to the nozzle. The process is as follows: After completing the first step of filling the solvent storage chamber (1-5), close the valve V1, the valve V4 and the valve V5; open the valve V2 and the valve V3 for a certain time Δt6 to make a certain amount of solvent Under the push of the power diaphragm (1-4), it enters the nozzle cleaning pipeline to complete a nozzle cleaning; The first and second steps above are performed reciprocally to achieve continuous scouring and cleaning of the nozzle. 8. The continuous ink jet printer cleaning and solvent adding method according to claim 7, characterized in that: in the step of filling the solvent storage chamber (1-5), if repeating the valve V3 and the The valve V4 is switched and closed X times, and the liquid level switch (2) still does not detect the liquid level signal, then it is determined that the solvent bottle (4) is empty; and the valve V3 is closed for the last time, and the The valve V4 has a certain time Δt8 until the power diaphragm (1-4) is pressed against the mold base (1-8) under the action of negative pressure, and the valve V1 and the valve V4 are closed.

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