CN114801424B - Control method for disassembling flexible printing sleeve - Google Patents
Control method for disassembling flexible printing sleeve Download PDFInfo
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- CN114801424B CN114801424B CN202210607741.0A CN202210607741A CN114801424B CN 114801424 B CN114801424 B CN 114801424B CN 202210607741 A CN202210607741 A CN 202210607741A CN 114801424 B CN114801424 B CN 114801424B
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- fixed support
- sleeve
- hmi
- mandrel
- place
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000007774 anilox coating Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 32
- 230000005611 electricity Effects 0.000 claims description 5
- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000006378 damage Effects 0.000 abstract description 4
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F5/00—Rotary letterpress machines
- B41F5/24—Rotary letterpress machines for flexographic printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/08—Cylinders
- B41F13/10—Forme cylinders
- B41F13/12—Registering devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/16—Programming systems for automatic control of sequence of operations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
The invention discloses a control method for disassembling a soft printing sleeve, which comprises the following steps: step 1, selecting a disassembly mode in the HMI; step 2, the plate roller and the anilox roller mandrel are withdrawn to a disassembly position; step 3, prompting the mandrel to be in place in the HMI; step 4, opening the fixed support; step 5, inflating the mandrel; step 6, exiting the sleeve; step 7, replacing the sleeve; step 8, closing the inflation switch and closing the fixed support; step 9, repeatedly executing the steps 1-8 until the N color groups are completed; the method can realize safe and convenient operation and save labor time; the sleeve collision damage caused by personnel factors is reduced.
Description
Technical Field
The invention belongs to the technical field of control of flexographic printing equipment devices, and relates to a control method for disassembling a flexographic printing sleeve.
Background
After the printing order is completed, the flexographic printing machine needs to detach the printing sleeve and the anilox roller sleeve from the equipment for order replacement; conventionally, an operator opens a control valve to manually remove the plate sleeve from the apparatus mandrel. Often because equipment space is narrow and small when dismantling the sleeve and mechanical structure closely causes time and energy consuming when operating personnel dismantles still causes personnel injury problem easily.
Disclosure of Invention
The invention aims to provide a control method for disassembling a flexographic printing sleeve, which can enable flexographic printing equipment to be electrically controlled when the sleeve is disassembled, so that an operator can easily and quickly take the sleeve off a mandrel which is installed for replacement, and the control method is time-saving and labor-saving for the operator and avoids sleeve damage caused by improper operation.
The technical scheme adopted by the invention is that the control method for disassembling the soft board printing sleeve is implemented according to the following steps:
step 1, selecting a disassembly mode in the HMI;
step 2, the plate roller and the anilox roller mandrel are withdrawn to a disassembly position;
step 3, prompting the mandrel to be in place in the HMI;
step 4, opening the fixed support;
step 5, inflating the mandrel;
step 6, exiting the sleeve;
step 7, replacing the sleeve;
step 8, closing the inflation switch and closing the fixed support;
and 9, repeating the steps 1-8 until the N color groups are completed.
The invention is also characterized in that:
the specific process of the step 1 is as follows:
step 1.1, selecting a manual or automatic disassembly mode in the HMI, executing step 1.2 if the manual mode is selected, and executing step 1.3 if the automatic mode is selected;
step 1.2, waiting for the next step of manual operation after each step is completed;
step 1.3, after starting, the sleeve is disassembled, a built-in complete process is executed, and each step of operation is automatically carried out by detecting signals of each position in place;
the specific process of the step 2 is as follows:
when the sleeve is selected to be replaced, the plate roller mandrel and the net roller mandrel can simultaneously act through 4 servo motors to withdraw to the set position;
the specific process of the step 3 is as follows:
step 3.1, after the plate roller mandrel and the net roller mandrel are withdrawn to the plate changing positions, the positions of the servo motor of the plate roller mandrel and the servo motor of the net roller mandrel are respectively and correspondingly compared with the two positions which are already set in the program, and after the position data are the same, the position in the HMI is triggered to be in place for warning;
step 3.2, when the user does not exit to the set position, the HMI prompts a position error alarm, and the next action is not executed;
the specific process of step 4 is that if the manual mode is selected, step 4.1 is executed, and if the automatic mode is selected, step 4.2 is executed:
step 4.1, controlling a fixed support electromagnetic valve through button operation, controlling air cylinder air inlet to push and open a fixed support upwards, and prompting the fixed support to be in place for warning in the HMI after a signal is detected by a fixed support opening detection switch;
step 4.2, controlling an electromagnetic valve through a program flow, controlling air inlet of an air cylinder to push and open a fixed support upwards, and prompting the fixed support to be in place for warning in the HMI after a signal is detected by a fixed support opening detection switch;
step 4.3, when the fixed support opening detection switch does not detect a signal, prompting that the fixed support is not opened in place for alarming in the HMI, and not executing the next action;
the specific process of the step 5 is as follows:
step 5.1, the detection in step 4 is completed, the pressure signal is detected in place, if a manual mode is selected, the step 5.2 is executed, and if an automatic mode is selected, the step 5.3 is executed;
step 5.2, after the solenoid valve is controlled by button operation, the air channel is opened to charge the mandrel;
step 5.3, after the electromagnetic valve is controlled to be electrified through a program flow, the air circuit is opened to inflate the mandrel;
step 5.4, when the pressure signal is the pressure detected, the HMI prompts the pressure shortage to give an alarm, and the next action is not executed;
the specific process of step 6 is that if the manual mode is selected, step 6.1 is executed, and if the automatic mode is selected, step 6.2 is executed:
step 6.1, after the sleeve control electromagnetic valve is disassembled through button operation, controlling the air inlet of the cylinder to push the sleeve outwards, and after the button is released, the cylinder is retracted;
step 6.2, after the electricity of the sleeve solenoid valve is disassembled through the control of a program flow, controlling the air inlet of the cylinder to push the sleeve outwards, and setting the retraction of the cylinder through the program; setting the extension time of the automatic cylinder through the HMI;
the specific process of the step 7 is as follows:
step 7.1, after the sleeve is withdrawn, an operator manually removes the sleeve, installs the replacement sleeve in place, and displays a sleeve in-place warning in the HMI after the sleeve in-place detection switch detects a signal;
7.2, after the sleeve is not installed in place, the sleeve in-place detection switch does not detect a signal, the HMI gives a warning prompt, and the next operation is not executed;
the specific process of the step 8 is as follows:
step 8.1, after step 7.1 is completed, executing step 8.2 if a manual mode is selected, and executing step 8.3 if an automatic mode is selected;
step 8.2, pressing an inflation button to close the mandrel inflation electromagnetic valve, pressing the button to close a fixed support cylinder electromagnetic valve, retracting the cylinder to close the fixed mandrel support, and prompting the fixed support to be in place for display in the HMI after the fixed support closing detection switch detects a signal;
step 8.3, triggering the set delay time in the HMI, executing the closing of the mandrel inflation electromagnetic valve after the delay time is finished, executing the closing of the fixed support cylinder electromagnetic valve cylinder, retracting the fixed mandrel support, and prompting the fixed support to be in place for display in the HMI after the fixed support closing detection switch detects the signal;
and 8.4, when the fixed support is closed, a warning prompt in the fixed support closing signal HMI is not detected, and the next operation is not executed.
The beneficial effects of the invention are as follows:
the control method for disassembling the flexographic printing sleeve provided by the invention has the advantages that the safe and convenient operation can be realized, the labor time is saved, and the sleeve collision damage caused by personnel factors is reduced.
Drawings
Fig. 1 is a schematic view showing the structure of an apparatus in a control method for removing a flexographic printing sleeve according to the present invention.
In the figure, 1-1 parts of fixed support cylinder 1-1,1-2 parts of fixed support cylinder A,2 parts of fixed support, 3 parts of sleeve, 4 parts of mandrel, 5 parts of disassembly cylinder, 6 parts of oil filling hole, 7 parts of air filling hole, 8 parts of pressure signal, 9 parts of rotary servo motor, 10 parts of fixed support opening detection switch, 11 parts of fixed support closing detection switch and 12 parts of sleeve in-place detection switch.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
The invention provides a control method for disassembling a flexographic printing sleeve, which is implemented by the following steps:
step 1, selecting a disassembly mode in the HMI:
step 1.1, selecting manual/automatic disassembly and release in an HMI;
step 1.2, manually waiting for the next step of manual operation after each step is completed;
step 1.3, automatically, after the sleeve is started, automatically performing each step of operation by using a procedure and detecting in-place signals of each position;
step 2, the plate roller and the anilox roller mandrel are withdrawn to a disassembly position:
when the sleeve is selected to be replaced, the plate roller mandrel and the net roller mandrel can simultaneously act through 4 servo motors to withdraw to the set position;
step 3, the HMI prompts the mandrel to be in place:
step 3.1, after the plate roller mandrel and the net roller mandrel are withdrawn to the plate changing positions, the positions of the servo motor of the plate roller mandrel and the servo motor of the net roller mandrel are respectively and correspondingly compared with the two positions which are already set in the program, and after the position data are the same, the position in the HMI is triggered to be in place for warning;
step 3.2, when the user does not exit to the set position, the HMI prompts a position error alarm, and the next action cannot be executed;
step 4, opening the fixed support:
step 4.1, manual mode: after the solenoid valve is controlled to be powered through button operation, the air cylinder is controlled to be charged to push and open the fixed support upwards, and after a signal is detected by the fixed support opening detection switch, the fixed support is prompted to be in place for warning in the HMI;
step 4.2, automatic mode: after the electricity of the electromagnetic valve is controlled through a program flow, the air inlet of the air cylinder is controlled to push and open the fixed support, and after a signal is detected by the fixed support opening detection switch, the fixed support is prompted to be in place for warning in the HMI;
step 4.3, when the fixed support opening detection switch does not detect a signal, the HMI prompts that the fixed support is not opened in place for alarming, and the next action cannot be executed;
step 5, pressing a button mandrel to inflate:
step 5.1, after the step 4 is completed and the pressure signal is detected in place;
step 5.2, manual mode: after the solenoid valve is controlled by button operation, the air channel is opened to charge the mandrel;
step 5.3, automatic mode: after the electromagnetic valve is controlled to be electrified through a program flow, the air circuit is opened to charge the mandrel;
step 5.4, when the pressure signal is the pressure detected, the HMI prompts the pressure shortage to give an alarm, and the next action is not executed;
step 6, pressing a button to withdraw from the sleeve:
step 6.1, after the electricity of the electromagnetic valve is controlled through button operation in a manual mode, controlling air inlet of the air cylinder to push the sleeve outwards, and loosening the button to retract the air cylinder;
step 6.2, after the electromagnetic valve is controlled by the automatic mode through a program flow, controlling the air inlet of the air cylinder to push the sleeve outwards, and setting the air cylinder to retract through a program; the automatic mode cylinder extension time can be set through the HMI;
step 7, sleeve replacement:
step 7.1, after the sleeve is withdrawn, an operator manually removes the sleeve, installs the replacement sleeve in place, and displays a sleeve in-place warning in the HMI after the sleeve in-place detection switch detects a signal;
7.2, after the sleeve is not installed in place, the sleeve in-place detection switch does not detect a signal, the HMI gives a warning prompt, and the next operation is not executed;
step 8, closing the inflation switch and closing the fixed support:
step 8.1, after step 7.1 is completed;
step 8.2, manual mode: pressing the inflation button closes the mandrel inflation solenoid valve. Pressing the button closes the fixed support cylinder solenoid valve and the cylinder retracts to close the fixed mandrel support. After the signal is detected by the fixed support closing detection switch, the HMI prompts the fixed support to be in place for display;
step 8.3, automatic mode: triggering the set delay time in the HMI, executing the closing of the mandrel inflation electromagnetic valve after the delay time is finished, and executing the closing of the fixed mandrel support by retracting the cylinder of the fixed support cylinder electromagnetic valve; after the signal is detected by the fixed support closing detection switch, the HMI prompts the fixed support to be in place for display;
step 8.4, when the fixed support is closed, a warning prompt in the fixed support closing signal HMI is not detected, and the next operation is not executed;
and 9, repeating the steps 1-8 until the N color groups are completed.
Examples
The invention provides a control method for disassembling a flexographic printing sleeve, which is applied to a printing equipment device shown in fig. 1 and comprises the following specific steps:
step 1, manually/automatically selecting an operation mode in the HMI, setting the extension delay holding time of the disassembly sleeve 3 and setting the inflation delay time of the mandrel 4;
step 2, clicking a plate changing button in the HMI, triggering a mandrel servo motor to act so as to move the mandrel 4 to a set plate changing position;
step 3, displaying a prompt warning of the current mandrel plate changing position in the HMI, and allowing the next operation to be executed;
step 4, after automatic mode selection, automatically triggering the fixed support 2 to open an electromagnetic valve after the process detects that a plate change position signal is met, ventilating the fixed support cylinder 1-1 and the fixed support cylinder A1-2 at two sides of the fixed support 2 after the electromagnetic valve is electrified, lifting the support upwards, displaying a prompt warning in the HMI after the fixed support opening detection switch 10 detects the signal after lifting, and allowing the next operation to be executed;
after the manual mode is selected, a lifting button of the fixed support 2 is manually clicked in the HMI, after the electromagnetic valve is electrified, the fixed support cylinders 1-1 and the fixed support cylinders A1-2 on the two sides of the fixed support 2 are ventilated, and the support is lifted upwards; after the fixed support is lifted, the detection switch 10 is opened, a prompt warning is displayed in the HMI after a signal is detected, and the next operation is allowed to be executed;
step 5, after automatic mode selection, automatically detecting a pressure signal after the process detects that the opening signal of the fixed support 2 is met, opening an inflation electromagnetic valve when the pressure signal meets a pressure condition, inflating the mandrel 4, displaying an inflation prompt warning of the mandrel 4 in the HMI, allowing the next operation to be executed, and prompting an alarm message in the HMI when the pressure condition is not met, and failing to perform the next automatic operation;
after the manual mode is selected, when the pressure signal meets the pressure condition, an inflation button in the HMI is clicked, an inflation electromagnetic valve is opened, and the mandrel 4 is inflated. Displaying a mandrel inflation prompt warning in the HMI, and allowing the next operation to be performed;
step 6, after automatic mode selection, executing electricity of a sleeve disassembly electromagnetic valve after the process detects that a pressure signal meets the requirement, enabling air inlet of the sleeve disassembly cylinder 5 to push out the sleeve outwards, and enabling the cylinder to retract after the sleeve disassembly cylinder 5 is withdrawn for a set time in the HMI;
after the manual mode is selected, clicking a sleeve disassembling button in the HMI, electrifying a sleeve disassembling electromagnetic valve, outwards pushing out a sleeve by air inlet of the disassembling cylinder 5, and retracting the disassembling cylinder 5 after loosening the button;
step 7, after the sleeve is withdrawn, an operator manually removes the sleeve, after the sleeve replacement is installed in place, the sleeve in-place detection switch 12 detects a signal, the HMI displays a sleeve in-place warning, and when the sleeve in-place detection switch 12 does not detect the signal, the next automatic operation cannot be performed;
step 8, after automatic mode selection, closing an inflation electromagnetic valve after a flow detects a sleeve in-place detection switch 12 signal and passing through a delay time set in an HMI, stopping inflation of the mandrel, simultaneously, retracting a fixed support electromagnetic valve power-off fixed support cylinder 1, locking the mandrel by a fixed support 2, and prompting the fixed support in-place display in the HMI after the fixed support closing detection switch 11 detects the signal;
after the manual mode is selected, clicking a stop inflation button mandrel in the HMI to stop inflation, clicking a fixed support closing button in the HMI, and retracting a fixed support cylinder when the fixed support electromagnetic valve is powered off, wherein the fixed support locks the mandrel;
and 9, after the replacement is completed, prompting the removal of the edition and the replacement completion by the HMI.
Claims (1)
1. The control method for disassembling the soft printing sleeve is characterized by comprising the following steps:
step 1, selecting a disassembly mode in the HMI, wherein the specific process is as follows:
step 1.1, selecting a manual or automatic disassembly mode in the HMI, executing step 1.2 if the manual mode is selected, and executing step 1.3 if the automatic mode is selected;
step 1.2, waiting for the next step of manual operation after each step is completed;
step 1.3, after starting, the sleeve is disassembled, a built-in complete process is executed, and each step of operation is automatically carried out by detecting signals of each position in place;
step 2, the plate roller and the anilox roller mandrel are withdrawn to a disassembly position, and when a sleeve is selected to be replaced, the plate roller mandrel and the anilox roller mandrel are withdrawn to a set position through simultaneous actions of 4 servo motors;
step 3, prompting the mandrel to be in place in the HMI, wherein the specific process is as follows:
step 3.1, after the plate roller mandrel and the net roller mandrel are withdrawn to the plate changing positions, the positions of the servo motor of the plate roller mandrel and the servo motor of the net roller mandrel are respectively and correspondingly compared with the two positions which are already set in the program, and after the position data are the same, the position in the HMI is triggered to be in place for warning;
step 3.2, when the user does not exit to the set position, the HMI prompts a position error alarm, and the next action is not executed;
step 4, opening the fixed support, if a manual mode is selected, executing step 4.1, and if an automatic mode is selected, executing step 4.2:
step 4.1, controlling a fixed support electromagnetic valve through button operation, controlling air cylinder air inlet to push and open a fixed support upwards, and prompting the fixed support to be in place for warning in the HMI after a signal is detected by a fixed support opening detection switch;
step 4.2, controlling an electromagnetic valve through a program flow, controlling air inlet of an air cylinder to push and open a fixed support upwards, and prompting the fixed support to be in place for warning in the HMI after a signal is detected by a fixed support opening detection switch;
step 4.3, when the fixed support opening detection switch does not detect a signal, prompting that the fixed support is not opened in place for alarming in the HMI, and not executing the next action;
step 5, the mandrel is inflated, and the concrete process is as follows:
step 5.1, the detection in step 4 is completed, the pressure signal is detected in place, if a manual mode is selected, the step 5.2 is executed, and if an automatic mode is selected, the step 5.3 is executed;
step 5.2, after the solenoid valve is controlled by button operation, the air channel is opened to charge the mandrel;
step 5.3, after the electromagnetic valve is controlled to be electrified through a program flow, the air circuit is opened to inflate the mandrel;
step 5.4, when the pressure signal is the pressure detected, the HMI prompts the pressure shortage to give an alarm, and the next action is not executed;
step 6, exiting the sleeve, wherein the specific process is that if a manual mode is selected, the step 6.1 is executed, and if an automatic mode is selected, the step 6.2 is executed:
step 6.1, after the sleeve control electromagnetic valve is disassembled through button operation, controlling the air inlet of the cylinder to push the sleeve outwards, and after the button is released, the cylinder is retracted;
step 6.2, after the electricity of the sleeve solenoid valve is disassembled through the control of a program flow, controlling the air inlet of the cylinder to push the sleeve outwards, and setting the retraction of the cylinder through the program; setting the extension time of the automatic cylinder through the HMI;
step 7, replacing the sleeve, wherein the concrete process is as follows:
step 7.1, after the sleeve is withdrawn, an operator manually removes the sleeve, installs the replacement sleeve in place, and displays a sleeve in-place warning in the HMI after the sleeve in-place detection switch detects a signal;
7.2, after the sleeve is not installed in place, the sleeve in-place detection switch does not detect a signal, the HMI gives a warning prompt, and the next operation is not executed;
step 8, closing an inflation switch and closing a fixed support, wherein the specific process is as follows:
step 8.1, after step 7.1 is completed, executing step 8.2 if a manual mode is selected, and executing step 8.3 if an automatic mode is selected;
step 8.2, pressing an inflation button to close the mandrel inflation electromagnetic valve, pressing the button to close a fixed support cylinder electromagnetic valve, retracting the cylinder to close the fixed mandrel support, and prompting the fixed support to be in place for display in the HMI after the fixed support closing detection switch detects a signal;
step 8.3, triggering the set delay time in the HMI, executing the closing of the mandrel inflation electromagnetic valve after the delay time is finished, executing the closing of the fixed support cylinder electromagnetic valve cylinder, retracting the fixed mandrel support, and prompting the fixed support to be in place for display in the HMI after the fixed support closing detection switch detects the signal;
step 8.4, when the fixed support is closed, a warning prompt in the fixed support closing signal HMI is not detected, and the next operation is not executed;
and 9, repeating the steps 1-8 until the N color groups are completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210607741.0A CN114801424B (en) | 2022-05-31 | 2022-05-31 | Control method for disassembling flexible printing sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210607741.0A CN114801424B (en) | 2022-05-31 | 2022-05-31 | Control method for disassembling flexible printing sleeve |
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| Publication Number | Publication Date |
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| CN114801424A CN114801424A (en) | 2022-07-29 |
| CN114801424B true CN114801424B (en) | 2023-12-12 |
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| CN202210607741.0A Active CN114801424B (en) | 2022-05-31 | 2022-05-31 | Control method for disassembling flexible printing sleeve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1575981A (en) * | 2003-06-26 | 2005-02-09 | 小森公司 | Method and apparatus for plate changing in printing press |
| CN107225842A (en) * | 2017-07-12 | 2017-10-03 | 新乡市大为创新印刷包装机械有限公司 | Printing machine dismounts roller and tilts Tiao Ban mechanisms automatically |
| CN107415431A (en) * | 2017-08-17 | 2017-12-01 | 西安昱杰机电设备有限公司 | The recessed soft Trinity wallpaper printing device of one kind circle |
| CN206899955U (en) * | 2017-07-12 | 2018-01-19 | 新乡市大为创新印刷包装机械有限公司 | Printing machine dismounts roller and tilts Tiao Ban mechanisms automatically |
| CN111823739A (en) * | 2020-07-16 | 2020-10-27 | 陕西北人印刷机械有限责任公司 | Control method for continuous operation switching order of CI (compact element) flexographic printing equipment |
| CN114347634A (en) * | 2021-12-20 | 2022-04-15 | 西安航天华阳机电装备有限公司 | Printing machine version roller gas filled structure |
-
2022
- 2022-05-31 CN CN202210607741.0A patent/CN114801424B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1575981A (en) * | 2003-06-26 | 2005-02-09 | 小森公司 | Method and apparatus for plate changing in printing press |
| CN107225842A (en) * | 2017-07-12 | 2017-10-03 | 新乡市大为创新印刷包装机械有限公司 | Printing machine dismounts roller and tilts Tiao Ban mechanisms automatically |
| CN206899955U (en) * | 2017-07-12 | 2018-01-19 | 新乡市大为创新印刷包装机械有限公司 | Printing machine dismounts roller and tilts Tiao Ban mechanisms automatically |
| CN107415431A (en) * | 2017-08-17 | 2017-12-01 | 西安昱杰机电设备有限公司 | The recessed soft Trinity wallpaper printing device of one kind circle |
| CN111823739A (en) * | 2020-07-16 | 2020-10-27 | 陕西北人印刷机械有限责任公司 | Control method for continuous operation switching order of CI (compact element) flexographic printing equipment |
| CN114347634A (en) * | 2021-12-20 | 2022-04-15 | 西安航天华阳机电装备有限公司 | Printing machine version roller gas filled structure |
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| CN114801424A (en) | 2022-07-29 |
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