A device and system for mitigating the impact force of a pneumatic mechanism

Abstract

The utility model discloses a device for slowing down the impact force of pneumatic mechanism, including cylinder, main road electromagnetic valve, branch electromagnetic valve, check valve and sealed container, the cylinder is intercommunication with main road electromagnetic valve, and main road electromagnetic valve controls the switching and discharge of cylinder extension side and cylinder contraction side gas source, the check valve is installed on one of the connecting pipeline of cylinder and main road electromagnetic valve, branch electromagnetic valve is communicated on the pipeline between check valve and cylinder, sealed container is communicated with branch electromagnetic valve, the utility model discloses through adding branch electromagnetic valve, check valve and sealed container on the pipeline between main road electromagnetic valve and cylinder, when the cylinder drives the scraping arm mechanism to press down, branch electromagnetic valve opens and will part compressed air be introduced into sealed container and store, thereby effectively buffering the movement speed of cylinder, the impact force is reduced significantly, the risk of being clamped because of the operation misjudgment or hand not in time is removed is avoided, and the security of large -scale pneumatic silk screen printing equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic mechanism technology, specifically to a device, system, and method for mitigating the impact force of a pneumatic mechanism. Background Technology

[0002] Screen printing is a type of stencil printing. The principle of stencil printing is that during printing, ink is transferred to the substrate through the perforations of the printing plate (a screen or other plate base with perforations that allow ink to pass through) under certain pressure. In screen printing, the ink is forced through the perforations of the image area by a squeegee, creating an image identical to the original artwork.

[0003] As described in the published patent CN212636879U, "A Novel Screen Printing Machine," a screen printing machine is a machine that uses a screen printing plate to apply ink. It belongs to the category of printing machines and is a general term for machines or equipment used to produce printed materials. Screen printing machines are representative printing equipment among stencil printing machines. Existing screen printing machines include an ink-spreading blade, an ink-spreading cylinder, a doctor blade, a doctor blade cylinder, a worktable, a hydraulic rod, and a printing plate holder. During printing, the user places the printing paper on the worktable, and then uses the hydraulic cylinder to lower the printing plate holder so that the printing plate is in close contact with the printing paper. The user then uses the ink-spreading cylinder to move the ink-spreading blade downwards, and the doctor blade cylinder to move the doctor blade downwards. The ink-spreading blade evenly distributes the ink on the printing plate, and the doctor blade prints the ink onto the printing paper. The printing paper is then removed. In the use of existing screen printing machines, it has been found that when manually placing the printing paper, it is easy to get caught in the lowering of the printing plate holder, resulting in poor safety.

[0004] When printing images and text on a substrate using a screen printing machine, especially when the substrate is large, large or even large pneumatic screen printing equipment is usually required. The control panel of the screen printing machine is operated to move the rocker arm, along with the screen printing plate, squeegee, and ink return squeegee, towards the worktable to complete the printing process. During the process of placing the substrate onto the worktable, the worker must also extend their hand under the screen printing plate. If someone misoperates and the screen printing plate moves downwards while the worker's hand is still under it, there is a significant safety hazard.

[0005] In summary, large or relatively large pneumatic screen printing equipment generates a strong impact force when the heavy scraper mechanism is pressed down by the cylinder during printing. If the operator handles the substrate improperly, it can easily cause injury. Existing pneumatic screen printing equipment has the problem of excessive impact force during the downward pressing process of the scraper mechanism, which poses a safety hazard. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A device for mitigating the impact force of a pneumatic mechanism includes a cylinder, a main solenoid valve, a branch solenoid valve, a check valve, and a sealed container.

[0009] The cylinder is interconnected with the main solenoid valve, which controls the switching and discharge of the air source on the cylinder extension side and the cylinder retraction side.

[0010] The one-way valve is installed on one of the connecting pipes between the cylinder and the main solenoid valve, and the branch solenoid valve is connected to the pipe between the one-way valve and the cylinder.

[0011] The sealed container is connected to the branch solenoid valve.

[0012] As a further embodiment of this utility model: the cylinder is mounted on the screen printing machine to drive the scraper arm mechanism to move;

[0013] The main solenoid valve is connected to an upper air pipe and a lower air pipe, which are respectively connected to the upper air port and the lower air port of the cylinder. The main solenoid valve is used to control the switching and discharge of the two air sources at the upper and lower air ports of the cylinder.

[0014] One end of the branch solenoid valve is connected to the sealed container, and the other end of the branch solenoid valve is connected to the lower air pipe. The lower air pipe includes a front air passage near the cylinder and a rear air passage near the main solenoid valve. The dividing point between the front air passage and the rear air passage is the connection point between the branch solenoid valve and the lower air pipe. The branch solenoid valve is used to control the exhaust and storage functions of the sealed container.

[0015] The one-way valve is installed in the rear gas path to prevent gas backflow and exhaust when the main solenoid valve is energized to switch the airflow.

[0016] As a further embodiment of this utility model: the cylinder includes a double-acting cylinder, the double-acting cylinder includes a cylinder spindle, the cylinder spindle is in the extended state by default, the normally closed end of the main solenoid valve is directly connected to the cylinder, the normally open end of the main solenoid valve is connected to the inlet end of the one-way valve, so that the cylinder spindle is extended, a three-way quick connector is provided at the connection point of the branch solenoid valve and the lower air pipe, the outlet end of the one-way valve is connected to the cylinder through one end of the three-way quick connector, the other end of the three-way quick connector is connected to the normally closed end interface of the branch solenoid valve, and the inlet end of the branch solenoid valve is connected to the sealed container to form a closed loop.

[0017] As a further embodiment of this utility model: the sealing container includes a single-interface sealing container.

[0018] As a further embodiment of this utility model: the sealed container includes a multi-port sealed container.

[0019] As a further aspect of this utility model: the sealed container includes a sealed container with adjustable volume.

[0020] As a further embodiment of this utility model, the diameter of the connecting pipe between the main solenoid valve and the cylinder, and / or the connecting pipe between the branch solenoid valve and the sealed container, is set to be greater than or equal to the diameter of the cylinder port.

[0021] As a further embodiment of this utility model: the branch solenoid valve is a two-position three-way solenoid valve, which, in its default normally closed state, together with the one-way valve, constitutes a fail-safe circuit; when the system is powered off or depressurized, this circuit locks the gas in the cylinder exhaust side passage, forcing the cylinder piston to stop moving, thereby achieving safe locking.

[0022] A system for mitigating the impact force of a pneumatic mechanism, the system comprising a switching device, a buffer device, and a pneumatic mechanism, the switching device being used to issue commands to the buffer device, the buffer device comprising the aforementioned device, and the pneumatic mechanism being integrated with the buffer device to mitigate the force exerted during the operation of the pneumatic mechanism.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] This invention adds a branch solenoid valve, a check valve, and a sealed container to the pipeline between the main solenoid valve and the cylinder. When the cylinder drives the scraper mechanism to press down, the branch solenoid valve opens and introduces some compressed air into the sealed container for storage, thereby effectively buffering the movement speed of the cylinder, significantly reducing the impact force, avoiding the risk of pinching injury caused by misjudgment of operation or failure to remove hands in time, and improving the safety of large pneumatic screen printing equipment. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural view of the present invention;

[0026] Figure 2 This is another three-dimensional view of the structure of this utility model;

[0027] Figure 3 This is a schematic diagram of the normal operation of the main solenoid valve and the branch solenoid valve in this utility model.

[0028] Figure 4 This is a schematic diagram of the operation of the main solenoid valve and the branch solenoid valve in the energized state in this utility model.

[0029] Figure 5 This is a three-dimensional view of one embodiment of the present invention;

[0030] Figure 6 This is another three-dimensional view of one embodiment of the present invention;

[0031] The reference numerals and names in the figure are as follows:

[0032] Cylinder-101, Cylinder spindle-102, Check valve-103, Sealed container-104, Main solenoid valve-105, Branch solenoid valve-106, Normally open end of main solenoid valve-107, Normally open exhaust port of main solenoid valve-108, Normally closed end of main solenoid valve-109, Normally closed exhaust port of main solenoid valve-110, Air inlet of main solenoid valve-111, Normally closed end of branch solenoid valve-112, Normally open end of branch solenoid valve-113, Air inlet of branch solenoid valve-114, Three-way quick connector-115, Scraper arm mechanism-201, Solenoid valve coil-301, Upper air pipe-116, Lower air pipe-117, Upper air port-118, Lower air port-119, Front air passage-120, Rear air passage-121. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figure 1-6 A device for mitigating the impact force of a pneumatic mechanism includes a cylinder 101, a main solenoid valve 105, a branch solenoid valve 106, a one-way valve 103, and a sealed container 104.

[0035] The cylinder 101 is interconnected with the main solenoid valve 105, which controls the switching and discharge of the air source on the extended side and the retracted side of the cylinder 101.

[0036] The one-way valve 103 is installed on one of the connecting pipes between the cylinder 101 and the main solenoid valve 105, and the branch solenoid valve 106 is connected to the pipe between the one-way valve 103 and the cylinder 101.

[0037] The sealed container 104 is connected to the branch solenoid valve 106;

[0038] By cleverly introducing a buffer branch controlled by a branch solenoid valve 106 into the main gas path, multiple significant effects are created;

[0039] First, regarding core safety performance, when the cylinder 101 drives the heavy scraper mechanism 201 to press down, the system can trigger the branch solenoid valve 106 to open, diverting some of the compressed air that was originally discharged quickly and storing it in the sealed container 104. This effectively slows down the end movement speed of the cylinder 101, transforming linear exhaust into flexible buffering, greatly reducing the risk of serious pinching or crushing injuries caused by equipment malfunction or failure of operators to remove their hands in time, fundamentally improving the human-machine safety of large pneumatic screen printing equipment.

[0040] Secondly, in terms of equipment protection and service life, the device absorbs and mitigates impact forces, significantly reducing the vibration and stress damage caused by the impact on the cylinder 101 itself, piston rod, seals, and the entire mechanical structure of the printing press (such as rocker arms, bearings, and screens), thereby reducing the equipment failure rate, extending the service life of core components, and reducing maintenance costs.

[0041] Meanwhile, in terms of improving printing quality, the smooth and gentle downward pressure process avoids violent impacts between the screen and the substrate (or worktable), which helps to prevent printing quality problems caused by this, ensuring uniform ink color and pattern quality of the printed matter. It is particularly suitable for high-quality printing needs. The solution has a simple structure and high integration, and is achieved by adding standard pneumatic components such as solenoid valves, one-way valves 103 and sealing containers 104. It does not require major modifications to the main structure of the existing equipment, and is low in cost and easy to implement and promote.

[0042] This invention adds a branch solenoid valve 106, a one-way valve 103, and a sealed container 104 to the pipeline between the main solenoid valve 105 and the cylinder 101. When the cylinder 101 drives the scraper mechanism 201 to press down, the branch solenoid valve 106 opens and introduces some compressed air into the sealed container 104 for storage. This effectively buffers the movement speed of the cylinder 101, significantly reduces the impact force, avoids the risk of pinching injury caused by misjudgment of operation or failure to remove hands in time, and improves the safety of large pneumatic screen printing equipment.

[0043] In this embodiment of the present invention, the cylinder 101 is mounted on the screen printing machine to drive the scraper arm mechanism 201 to move.

[0044] The main solenoid valve 105 is connected to an upper air pipe 116 and a lower air pipe 117. The upper air pipe 116 and the lower air pipe 117 are respectively connected to the upper air port 118 and the lower air port 119 of the cylinder 101. The main solenoid valve 105 is used to control the switching and discharge of the two air sources at the upper air port 118 and the lower air port 119 of the cylinder 101.

[0045] One end of the branch solenoid valve 106 is connected to the sealed container 104, and the other end of the branch solenoid valve 106 is connected to the lower air pipe 117. The lower air pipe 117 includes a front air passage 120 near the cylinder 101 and a rear air passage 121 near the main solenoid valve 105. The dividing point between the front air passage 120 and the rear air passage 121 is the connection point between the branch solenoid valve 106 and the lower air pipe 117. The branch solenoid valve 106 is used to control the exhaust and gas storage functions of the sealed container 104.

[0046] The one-way valve 103 is installed in the rear gas path 121 and is used to prevent gas backflow and exhaust when the main solenoid valve 105 is energized to switch the airflow.

[0047] Through highly coordinated component layout and precise control logic, it provides high-performance safety buffer protection for large screen printing machines;

[0048] This utility model's technical solution connects the buffer branch (branch solenoid valve 106 and sealed container 104) in parallel to the key air path driving the scraper arm downward—namely, the "lower air pipe 117" connecting the lower chamber of cylinder 101. This allows the buffer system to act directly and efficiently on the source of the downward impact force. Its core working mechanism is that when the scraper arm needs to move downward, the main solenoid valve 105 and the branch solenoid valve 106 are triggered simultaneously. The exhaust gas from the lower chamber of cylinder 101 cannot be rapidly discharged through the main solenoid valve 105 due to the obstruction of the one-way valve 103, and is instead forcibly introduced into the sealed container 104 for storage. This significantly reduces the back pressure and exhaust speed of the lower chamber of cylinder 101 by absorbing high-pressure gas through the sealed container 104. Furthermore, by maintaining the upper chamber intake pressure, a pressure difference buffer environment of "upper chamber pressure > lower chamber pressure" is created, thereby transforming the rigid, high-speed downward motion of the heavy scraper arm mechanism 201 into a controllable and flexible... The slow descent significantly enhances safety, completely preventing serious crushing injuries that could result from equipment malfunctions or operators' hands not being promptly removed from the work area. Furthermore, in terms of equipment protection and performance, this active force-relieving mechanism greatly absorbs the kinetic energy of moving parts, effectively suppressing mechanical vibration and impact. This not only protects cylinder 101, piston rod, and their seals but also extends the service life of the entire mechanical system, including the scraper arm mechanism 201, bearings, and screen printing plate, reducing maintenance costs. Simultaneously, the smooth downward movement avoids violent impacts between the screen and the substrate, improving the stability of printing quality. Finally, this design combines ingenuity and practicality. All components are based on mature pneumatic standard parts. By optimizing the air circuit connections (such as placing the one-way valve 103 in the rear air circuit 121 and the branch solenoid valve 106 with a single interface to the storage tank), it achieves seamless integration into existing equipment with minimal modifications and low cost, realizing a high-performance safety upgrade.

[0049] In this embodiment of the utility model, the cylinder (101) includes a double-acting cylinder 101, which includes a cylinder spindle 102. The cylinder spindle 102 is in the extended state by default. The normally closed end 109 of the main solenoid valve is directly connected to the cylinder 101, and the normally open end 107 of the main solenoid valve is connected to the air inlet end of the one-way valve 103, so that the cylinder spindle 102 is extended. A three-way quick connector 115 is provided at the connection point between the branch solenoid valve 106 and the lower air pipe 117. The air outlet end of the one-way valve 103 is connected to the cylinder 101 through one end of the three-way quick connector 115, and the other end of the three-way quick connector 115 is connected to the interface of the normally closed end 112 of the branch solenoid valve. The air inlet end of the branch solenoid valve is connected to the sealed container 104 to form a closed loop.

[0050] The use of a double-acting cylinder 101 and the optimization of the air circuit connection design further improve the buffering performance and reliability of the device;

[0051] The normally open end 107 of the main solenoid valve is connected to the air circuit through the one-way valve 103, and the air outlet end of the one-way valve 103, the air pipe 117 at the lower end of the cylinder 101 and the normally closed end of the branch solenoid valve are intelligently interconnected by the three-way quick connector 115 to form a high-efficiency closed-loop buffer circuit.

[0052] When the branch solenoid valve 106 and the main solenoid valve 105 are triggered simultaneously, the exhaust gas from the lower chamber of cylinder 101 is quickly introduced into the sealed container 104 through the three-way connector under the guidance of the one-way valve 103, instead of being directly discharged to the atmosphere. This greatly reduces the exhaust back pressure and significantly slows down the downward speed of the scraper arm through the pressure difference effect, transforming rigid impact into flexible buffer and completely avoiding the risk of crushing. At the same time, this closed-loop design reduces pressure loss and improves response speed, which not only effectively protects the mechanical structure and printing plate and improves printing quality, but also simplifies installation and maintenance by using standard parts and quick connectors, achieving high-performance and high-reliability safety buffering.

[0053] In this embodiment of the present invention, the sealing container 104 includes a single-interface sealing container 104;

[0054] By adopting a single-interface sealed container 104, the air path structure and installation process of the entire buffer device are greatly simplified.

[0055] The single-interface design directly connects to the air inlet of the branch solenoid valve 106, eliminating the need for complex multi-port connectors and additional piping. This not only reduces the manufacturing and procurement costs of the components themselves but also reduces potential leakage points, improving airtightness and system reliability. This simple connection method allows the sealed container 104 to be arranged more flexibly within the limited space of the equipment, significantly reducing the complexity and time cost of installation and maintenance. At the same time, it ensures the response efficiency of the air storage and depressurization functions. Thus, while ensuring excellent buffering performance (smooth force relief, avoidance of impact, and improved safety), the entire device achieves a comprehensive benefit of being compact, economical, practical, stable, and reliable.

[0056] In this embodiment of the present invention, the sealing container 104 includes a multi-port sealing container 104;

[0057] By adopting a multi-port sealed container 104, the scalability and adaptability of the device's buffering capacity are significantly improved: the multi-port design allows for convenient connection of multiple tanks in series, thereby flexibly expanding the total volume of the sealed container 104 according to the different specifications of the cylinder 101, the weight of the scraper arm, and the required buffering force in actual applications, achieving effective absorption and smooth dissipation of greater kinetic energy and stronger impact force; this scalability allows the same device to be widely adapted to large screen printing equipment of different models and tonnages, enhancing its versatility, while further improving the equipment's operational stability, printing quality consistency, and operational safety by optimizing the buffering effect. Its modular series connection method also facilitates installation, adjustment, and maintenance, providing a high degree of flexibility for equipment upgrades and modifications.

[0058] In this embodiment of the present invention, the sealed container 104 includes a sealed container 104 with adjustable volume;

[0059] By using a sealed container 104 with adjustable volume, precise and dynamic control of the buffering effect is achieved, thereby significantly improving the device's performance optimization capability and applicability.

[0060] Operators can flexibly adjust the volume of the sealed container 104 according to specific printing process requirements, the actual weight of the scraper arm, and the operating speed. This allows for precise control of the volume and final pressure of the gas introduced into the exhaust side of the cylinder 101, ensuring that the buffer force is accurately matched and counteracts the downward impulse energy. This ensures that the scraper arm mechanism 201 always descends at a safer and smoother speed, completely eliminating safety hazards. This fine adjustment capability not only allows a single device to perfectly adapt to various specifications of screen printing equipment and production scenarios, from light to heavy-duty, greatly enhancing its versatility, but also eliminates the hassle of replacing containers of different capacities, simplifying the debugging process. At the same time, by optimizing the buffering process, it further reduces the impact on the mechanical structure, extends the equipment's lifespan, and ensures the stability of printing quality, achieving a high degree of unity between safety, efficiency, and cost-effectiveness.

[0061] In this embodiment of the present invention, the diameter of the connecting pipe between the main solenoid valve 105 and the cylinder 101, and / or the connecting pipe between the branch solenoid valve 106 and the sealed container 104, is set to be greater than or equal to the diameter of the air port of the cylinder 101.

[0062] By setting the diameter of the main and branch connecting pipes to be greater than or equal to the diameter of the air port of cylinder 101, the buffer response speed and overall performance of the device are significantly improved: increasing the diameter effectively reduces the resistance of airflow in the pipes, allowing the high-pressure gas on the exhaust side of cylinder 101 to flow into the sealed container 104 more quickly, thereby greatly shortening the response time of the buffer system and ensuring that a smooth and effective buffering force can be provided immediately from the initial stage of the scraper arm pressing action, avoiding the delay caused by pipe throttling; this not only further enhances operational safety and completely eliminates the impact hazard, but also ensures the uniformity of the pressing speed during the printing process, thereby improving the stability and consistency of printing quality. At the same time, the high-speed gas exchange also optimizes the equipment's operating cycle efficiency. Its design does not change the core components but only optimizes the pipe parameters, achieving a low-cost and high-reliability performance improvement.

[0063] In this embodiment of the utility model, the branch solenoid valve 106 is a two-position three-way solenoid valve, which is normally closed by default and together with the one-way valve 103 forms a fail-safe circuit; when the system is powered off or depressurized, this circuit locks the gas in the exhaust side passage of the cylinder 101, forcing the piston of the cylinder 101 to stop moving, so as to achieve safe locking.

[0064] By employing a two-position three-way solenoid valve and designing it in conjunction with the one-way valve 103 in its default normally closed state, a crucial fail-safe loop is constructed, thereby providing a passive safety protection mechanism for the system.

[0065] In the event of a sudden power outage or gas supply failure, the branch solenoid valve 106 will automatically reset to its normally closed state, forming a reliable gas-locking barrier together with the check valve 103. This seals the compressed air in the exhaust passage of cylinder 101 within the circuit, effectively preventing the piston of cylinder 101 from continuing to move. This forces the heavy scraper arm mechanism 201 to stop immediately and lock in its current position, avoiding the scraper arm from suddenly falling or surging uncontrollably due to pressure loss. This completely eliminates the huge risk of injuring operators or damaging the printing substrate and equipment. This mechanism takes effect automatically without the need for external power or control signals, greatly improving the intrinsic safety level of the equipment and providing operators with another solid safety guarantee. It also helps protect the precision mechanical structure from impact damage.

[0066] A system for mitigating the impact force of a pneumatic mechanism, the system comprising a switching device, a buffer device, and a pneumatic mechanism, the switching device being used to issue commands to the buffer device, the buffer device comprising the aforementioned device, and the pneumatic mechanism being integrated with the buffer device to mitigate the force exerted during the operation of the pneumatic mechanism;

[0067] By integrating the switching device, buffer device and pneumatic mechanism into a unified system, the entire process of coordinated control from command issuance and power execution to impact force reduction is realized, thus constructing a highly efficient, reliable and easy-to-install safety solution.

[0068] This system issues precise commands to the buffer device via a switching device. The buffer device is integrated with the pneumatic mechanism, allowing the impact force generated by the pneumatic mechanism during operation to be actively absorbed and neutralized at the source. This not only greatly improves the inherent safety level of the equipment and completely eliminates the risk of operator injury, but also significantly reduces the damage to the mechanical structure caused by impact vibration, extending the service life of the equipment. At the same time, this integrated system design simplifies the installation and commissioning process, improves response speed and control accuracy, and ensures stable and reliable safety performance. It is particularly suitable for industrial applications with extremely high safety and reliability requirements, such as large-scale pneumatic screen printing equipment. It is also suitable for pneumatic mechanisms with biting action, reducing the biting force during pneumatic mechanism operation and ensuring safe production.

[0069] A method for mitigating the impact force of a pneumatic mechanism, the method employing the aforementioned device, the method being applied to the scraper arm printing operation of a rocker arm screen printing machine, the method comprising the following steps:

[0070] S1. Printing control process with the scraper arm pressing down:

[0071] The control system simultaneously sends a pressure command to the main solenoid valve 105 and the branch solenoid valve 106.

[0072] When the main solenoid valve 105 responds to the command, its normally open end closes and its normally closed end opens, allowing the air source to enter the upper chamber of the cylinder 101 through the normally closed end air passage.

[0073] The branch solenoid valve 106 responds to the command synchronously, with its normally open end closed and its normally closed end open, so that the exhaust passage of the lower chamber of cylinder 101 is connected to the normally closed end of the branch solenoid valve 106.

[0074] The gas discharged from the lower chamber of cylinder 101 cannot flow back to the main solenoid valve 105 due to the obstruction of the one-way valve 103. Instead, it flows into the sealed container 104 for storage through the normally closed end of the branch solenoid valve 106.

[0075] As gas is continuously stored in the sealed container 104, the air pressure in the lower chamber of cylinder 101 continues to decrease, while the air pressure in the upper chamber of cylinder 101 is maintained, creating a pressure difference environment where the air pressure in the upper chamber is greater than that in the lower chamber.

[0076] Under the action of pressure difference, the cylinder spindle 102 performs a retraction action, which drives the rocker arm screen printing machine scraper arm to press down smoothly to complete the printing;

[0077] S2, Scraper arm lifting and reset control process:

[0078] After printing is completed, the control system sends an upward command to the main solenoid valve 105 and the branch solenoid valve 106 at the same time.

[0079] When the main solenoid valve 105 switches states, its normally closed end is closed and its normally open end is open, allowing the air source to enter the lower chamber of cylinder 101 through the normally open end air path.

[0080] The branch solenoid valve 106 synchronously switches states, with its normally closed end closed and its normally open end open, allowing the stored gas in the sealed container 104 to be discharged outward through the normally open end 113 of the branch solenoid valve.

[0081] The cylinder 101 is continuously pushed by the intake pressure in the lower chamber, while the gas in the upper chamber is discharged through the main solenoid valve 105. The cylinder spindle 102 performs the extension action, which drives the rocker arm of the screen printing machine to lift and reset.

[0082] By defining a precise and coordinated dual solenoid valve synchronous control method, the hardware performance of the device is transformed into a repeatable and reliable safe operating procedure, realizing seamless integration and intelligent management of the buffering process and printing action.

[0083] By synchronously triggering the switching of the main and branch solenoid valves 106, the exhaust gas from the lower chamber of cylinder 101 is directed into the sealed container 104 during the scraper arm pressing phase, actively creating a controllable differential pressure environment. This transforms the traditional rigid impact into a fully controlled, flexible deceleration motion, completely eliminating the risk of crushing injuries and significantly reducing equipment vibration and impact damage, extending mechanical life and improving printing quality. During the reset phase, the same synchronous control logic ensures rapid venting of the gas storage and efficient reset of cylinder 101, taking into account production efficiency. The entire method transforms the safety characteristics of the device into standardized and automated process steps, ensuring reliable and consistent operation without relying on personnel experience. It is particularly suitable for modern printing production environments that require high-frequency, high-safety operations.

[0084] In one embodiment, the sealed container 104 includes a gas storage tank.

[0085] In one embodiment, when the cylinder spindle 102 is in the retracted state by default, the upper air pipe 116 and the lower air pipe 117 are reversed to the upper air port 118 and the lower air port 119 of the cylinder 101.

[0086] By reversing the connection between the upper air pipe 116 and the lower air pipe 117 and the corresponding air port of the cylinder, the adaptability and versatility of the buffer device are significantly enhanced. When the cylinder spindle is in the retracted state by default, this reversal scheme allows the entire buffer system to adapt to new installation configurations without changing the connection logic and control program of its core components, thus buffering the process of the cylinder spindle 102 extending. This ensures that the excellent buffering performance of this invention can be consistently achieved under different equipment or different cylinder installation methods. This flexible adaptability greatly expands the application range of the device and realizes a plug-and-play universal safety solution.

[0087] In one embodiment, the device of this invention is applicable to a pneumatic vertical lifting screen printing machine;

[0088] Specifically, the device is applicable to pneumatic vertical lifting screen printing machines. This device can be integrated into such equipment, directly addressing the inherent risk of strong impact forces generated by the vertical lifting mechanism under its own weight. Through real-time buffering and force relief, it effectively prevents crushing accidents that may be caused by accidental downward movement of the lifting platform, greatly improving equipment safety. Simultaneously, its smooth deceleration protects the precision lifting guide rails, lead screws, and transmission mechanisms, reducing maintenance needs and extending equipment lifespan. It also avoids the impact of lifting vibration on printing accuracy, ensuring printing stability. This provides a ready-to-use, efficient, and reliable safety solution for this widely used specialized equipment.

[0089] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for mitigating the impact force of a pneumatic mechanism, characterized in that, Includes a cylinder (101), a main solenoid valve (105), a branch solenoid valve (106), a check valve (103), and a sealed container (104). The cylinder (101) is interconnected with the main solenoid valve (105), and the main solenoid valve (105) controls the switching and discharge of the air source on the extended side and the retracted side of the cylinder (101); The one-way valve (103) is installed on one of the connecting pipes between the cylinder (101) and the main solenoid valve (105), and the branch solenoid valve (106) is connected to the pipe between the one-way valve (103) and the cylinder (101). The sealed container (104) is connected to the branch solenoid valve (106).

2. The device for mitigating the impact force of a pneumatic mechanism according to claim 1, characterized in that, The cylinder (101) is mounted on the screen printing machine to drive the scraper arm mechanism (201) to move; The main solenoid valve (105) is connected to an upper air pipe (116) and a lower air pipe (117). The upper air pipe (116) and the lower air pipe (117) are respectively connected to the upper air port (118) and the lower air port (119) of the cylinder (101). The main solenoid valve (105) is used to control the switching and discharge of the two air sources of the cylinder (101) at the upper air port (118) and the lower air port (119). One end of the branch solenoid valve (106) is connected to the sealed container (104), and the other end of the branch solenoid valve (106) is connected to the lower air pipe (117). The lower air pipe (117) includes a front air passage (120) near the cylinder (101) and a rear air passage (121) near the main solenoid valve (105). The dividing point between the front air passage (120) and the rear air passage (121) is the connection point between the branch solenoid valve (106) and the lower air pipe (117). The branch solenoid valve (106) is used to control the exhaust and gas storage functions of the sealed container (104). The one-way valve (103) is installed in the rear gas path (121) to prevent gas backflow and exhaust when the main solenoid valve (105) is energized to switch the airflow.

3. The device for mitigating the impact force of a pneumatic mechanism according to claim 2, characterized in that, The cylinder (101) includes a double-acting cylinder (101), which includes a cylinder spindle (102). The cylinder spindle (102) is in the extended state by default. The normally closed end (109) of the main solenoid valve is directly connected to the cylinder (101). The normally open end (107) of the main solenoid valve is connected to the air inlet end of the one-way valve (103), so that the cylinder spindle (102) is extended. A three-way quick connector (115) is provided at the connection point between the branch solenoid valve (106) and the lower air pipe (117). The air outlet end of the one-way valve (103) is connected to the cylinder (101) through one end of the three-way quick connector (115). The other end of the three-way quick connector (115) is connected to the interface of the normally closed end (112) of the branch solenoid valve. The air inlet end of the branch solenoid valve is connected to the sealed container (104) to form a closed loop.

4. A device for mitigating the impact force of a pneumatic mechanism according to any one of claims 1-3, characterized in that, The sealed container (104) includes a single-port sealed container (104).

5. A device for mitigating the impact force of a pneumatic mechanism according to any one of claims 1-3, characterized in that, The sealed container (104) includes a multi-port sealed container (104).

6. A device for mitigating the impact force of a pneumatic mechanism according to any one of claims 1-3, characterized in that, The sealed container (104) includes a sealed container (104) with adjustable volume.

7. A device for mitigating the impact force of a pneumatic mechanism according to any one of claims 1-3, characterized in that, The diameter of the connecting pipe between the main solenoid valve (105) and the cylinder (101), and / or the connecting pipe between the branch solenoid valve (106) and the sealed container (104) is set to be greater than or equal to the diameter of the air port of the cylinder (101).

8. A device for mitigating the impact force of a pneumatic mechanism according to any one of claims 1-3, characterized in that, The branch solenoid valve (106) is a two-position three-way solenoid valve. Its default normally closed state together with the one-way valve (103) forms a fail-safe circuit. When the system is powered off or depressurized, this circuit locks the gas in the exhaust side passage of the cylinder (101), forcing the piston of the cylinder (101) to stop moving, so as to achieve safe locking.

9. A system for mitigating the impact force of a pneumatic mechanism, the system comprising a switching device, a buffer device, and a pneumatic mechanism, the switching device being used to issue commands to the buffer device, characterized in that, The buffer device includes the device according to any one of claims 1-8, wherein the pneumatic mechanism and the buffer device are integrated into one unit to reduce the force exerted by the pneumatic mechanism during operation.

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