Piston blocking type vacuum adsorption positive pressure breaking vacuum cleaning suction pen

Abstract

The invention is suitable for the field of vacuum adsorption, and provides a piston blocking type vacuum adsorption positive pressure breaking vacuum cleaning suction pen which comprises a negative pressure pipeline, a positive pressure pipeline, a controller, an exchange valve, a shared pipeline, a piston, a suction cup, a piston limiting magnetic ring, a pressure sensor, a position sensor and a cavity. The exchange valve is communicated with the negative pressure pipeline, the positive pressure pipeline and the common pipeline, the common pipeline is connected into a cavity where the piston is located, the suction cup is fixed to the bottom end of the piston, the pressure sensor and the position sensor are electrically connected with the controller, and the exchange valve is controlled by the controller; positive pressure air is physically blocked from making contact with a product through the piston, the operation cleanliness is improved, the capital construction requirement is lowered, and the product quality is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of vacuum adsorption, and particularly relates to a piston-barrier vacuum adsorption positive pressure vacuum cleaning pen. Background Technology

[0002] Currently, the common operating method used in the industry for suction pens is vacuum adsorption to pick up the pens. After the product is transferred to the designated location, the pens are released by breaking the vacuum with positive pressure. The positive pressure gas is directly delivered to the suction cup through the air pipe, and the compressed air is filtered only by the conventional filter element in the pipe. In order to reduce gas impurity pollution, some companies will also choose to upgrade the compressed air system and filter pipes and other infrastructure.

[0003] Existing technologies have the following three prominent problems in practical applications: Oil, grease and other greases may remain in the booster pump and piping system of the compressed air system. At the same time, moisture in the air will mix into the positive pressure gas. These impurities will be sprayed directly onto the surface of the work product with the positive pressure gas, forming dirt adhesion. For products with ultra-high cleanliness requirements, the quality standards cannot be met. Conventional filter cartridges have limited filtration accuracy and are prone to clogging and reduced filtration efficiency after prolonged use. They cannot effectively filter fine dust particles in the air. These fine dust particles will come into contact with the product surface with the airflow, affecting the product's fit accuracy and surface cleanliness, and thus affecting the quality of the finished product. To alleviate the problem of gaseous impurity pollution, enterprises need to invest heavily in upgrading compressed air systems and pipeline clean facilities, which places extremely high demands on the cleanliness level and configuration of production infrastructure. This not only increases infrastructure investment but also makes it difficult to eliminate pollution risks at the source. Therefore, a piston-barrier vacuum adsorption positive pressure vacuum cleaning pen is needed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a piston-barrier vacuum adsorption positive pressure vacuum cleaning pen to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A piston-barrier vacuum adsorption positive pressure vacuum cleaning pen includes a negative pressure pipe, a positive pressure pipe, a controller, an exchange valve, a common pipe, a piston, a suction cup, a piston limiting magnetic ring, a pressure sensor, a position sensor, and a cavity. The first port of the exchange valve is connected to the output end of the negative pressure pipeline, the second port of the exchange valve is connected to the output end of the positive pressure pipeline, the third port of the exchange valve is connected to the input end of the common pipeline, the output end of the common pipeline is connected to the input end of the cavity, and the piston is slidably connected in the cavity. The piston limiting magnetic ring is embedded outside the cavity, and the suction cup is fixedly connected to the output end of the cavity; The pressure sensor is installed inside the cavity and is electrically connected to the signal input terminal of the controller. The position sensor is installed inside the cavity and is electrically connected to the signal input terminal of the controller. The exchange valve is electrically connected to the signal output terminal of the controller. The piston can move axially within the cavity. By switching the pipeline, the piston movement enables vacuum adsorption and positive pressure vacuum breaking. The piston also prevents the positive pressure air from directly contacting the product adsorbed by the suction cup.

[0006] In a further technical solution, the piston is pneumatically driven and includes a pneumatic drive component. The pneumatic drive component is connected to the top of the piston and electrically connected to the controller.

[0007] In a further technical solution, the piston is driven by a cylinder and also includes a miniature cylinder. The piston rod of the miniature cylinder is fixedly connected to the top of the piston, and the miniature cylinder is electrically connected to the controller.

[0008] In a further technical solution, the piston is driven by a screw and includes a micro screw and a drive motor. The micro screw is threaded to the top of the piston, the output shaft of the drive motor is driven by the micro screw, and the drive motor is electrically connected to the controller.

[0009] In a further technical solution, the number of piston limiting magnetic rings is two, and the two piston limiting magnetic rings are arranged at intervals along the axial direction of the cavity, respectively used to limit the maximum stroke and minimum stroke of the piston.

[0010] In a further technical solution, the suction cup is an anti-static silicone suction cup, and the suction end face of the suction cup is provided with anti-slip micro-protrusions.

[0011] In a further technical solution, the common pipeline is also equipped with a one-way valve, the one-way valve being directed from the exchange valve to the cavity where the piston is located.

[0012] In a further technical solution, the controller is a programmable logic controller, and the controller is also equipped with a touch screen and an emergency stop button. The touch screen is used to display pressure parameters and piston position parameters, and the emergency stop button is used to cut off the power to the equipment in an emergency.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention eliminates direct contamination of products by grease and moisture, building a solid foundation for ultra-high cleanliness operations: the movement of the piston within the cavity creates a physical barrier, and the positive pressure airflow entering the cavity only pushes the piston down to break the negative pressure at the suction cup, without directly contacting the product, thus cutting off the contamination path of grease and moisture at the source; at the same time, the one-way valve on the shared pipeline prevents residual impurities in the pipeline from flowing back into the cavity, further avoiding secondary contamination, allowing the product surface to be completely free of dirt adhesion, fully meeting the quality threshold of ultra-high cleanliness operations; This invention intercepts minute dust particles, ensuring precise product bonding accuracy: It constructs a multi-layered cleanliness system consisting of "filter cartridge filtration + piston barrier + one-way valve protection." The filter cartridge first performs preliminary filtration of compressed air, and any unintercepted minute dust particles are blocked outside the product contact area by the piston's sealing structure. Furthermore, the one-way valve prevents dust from flowing back into the cavity with the airflow. In addition, the precise stroke control of the piston avoids dust dispersion caused by airflow turbulence, ensuring that the product does not come into contact with minute dust particles throughout the entire process of adsorption, transfer, and placement. This guarantees the surface cleanliness and bonding accuracy of the product, preventing dust from affecting the performance of the finished product. This invention reduces infrastructure requirements and significantly cuts overall production investment: By addressing the issue of impurity contamination through structures such as piston barriers at the equipment end, enterprises can directly connect to conventional compressed air sources for production without additional investment in infrastructure upgrades. At the same time, the modular design of the equipment reduces the difficulty of later operation and maintenance, and the diverse piston drive methods can be adapted to existing production line power systems without the need to rebuild a dedicated power link. This invention reduces the overall production investment of enterprises from multiple dimensions, including infrastructure, transformation, and operation and maintenance, achieving a balance between cost reduction and efficiency improvement.

[0014] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a frontal structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention in frontal cross-section; Figure 3 This is a schematic diagram of a partial three-dimensional cross-section of the piston of the present invention.

[0016] In the diagram: 1. Negative pressure pipeline; 2. Positive pressure pipeline; 3. Controller; 4. Exchange valve; 5. Common pipeline; 6. Piston; 7. Suction cup; 8. Piston limiting magnetic ring; 9. Pressure sensor; 10. Position sensor; 11. Cavity. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0019] like Figure 1-3 As shown, this embodiment of the invention provides a piston-barrier vacuum adsorption positive pressure vacuum cleaning pen, including a negative pressure pipe 1, a positive pressure pipe 2, a controller 3, an exchange valve 4, a common pipe 5, a piston 6, a suction cup 7, a piston limiting magnetic ring 8, a pressure sensor 9, a position sensor 10, and a cavity 11. The first port of the exchange valve 4 is connected to the output end of the negative pressure pipeline 1, the second port of the exchange valve 4 is connected to the output end of the positive pressure pipeline 2, the third port of the exchange valve 4 is connected to the input end of the common pipeline 5, the output end of the common pipeline 5 is connected to the input end of the cavity 11, and the piston 6 is slidably connected inside the cavity 11. The piston limiting magnetic ring 8 is embedded outside the cavity 11, and the suction cup 7 is fixedly connected to the output end of the cavity 11. Pressure sensor 9 is installed inside cavity 11 and is electrically connected to the signal input terminal of controller 3. Position sensor 10 is installed inside cavity 11 and is electrically connected to the signal input terminal of controller 3. Exchange valve 4 is electrically connected to the signal output terminal of controller 3. The piston 6 can move axially within the cavity 11. The movement of the piston 6, in conjunction with the switching of the pipeline, enables vacuum adsorption and positive pressure vacuum breaking. The piston 6 also prevents the positive pressure air from directly contacting the product adsorbed by the suction cup 7.

[0020] In this embodiment, the anti-static silicone suction cup 7 can prevent electrostatic damage to sensitive products, and the anti-slip micro-protrusions ensure that the products do not slip during the transfer process; the dual piston limiting magnetic ring 8 and the sensing feedback system can achieve precise control of the piston 6 stroke, avoid poor adsorption or impact when releasing the sheet, and greatly improve the stability of operation; the multi-parameter storage and visual monitoring function of the programmable controller 3 can be adapted to the operation of multiple product categories, and improve the flexible production capacity of the equipment. An integrated control system of "pipeline switching - piston linkage - sensor feedback" has been constructed. The exchange valve 4 realizes precise switching between negative and positive pressure channels, the shared pipeline 5 ensures stable airflow transmission, and the pressure sensor 9 and position sensor 10 provide real-time operating data to the controller 3, forming a closed-loop control. The physical barrier design of the piston 6 is a core innovation that distinguishes it from existing technologies. It not only completes the adsorption and vacuum breaking action through the principle of a syringe, but also cuts off the contact path between impurities carried by positive pressure air and the product at the source. At the same time, the connection relationship of each component ensures the stability of equipment operation and the reliability of clean protection, which can meet the core requirements of ultra-high cleanliness operations.

[0021] Specifically, piston 6 is pneumatically driven and includes a pneumatic drive component. The pneumatic drive component is connected to the top of piston 6 and is electrically connected to controller 3.

[0022] In this embodiment, the pneumatic drive method is adapted to production lines that are mainly pneumatically controlled. It can be directly connected to the existing pneumatic source of the production line without the need for additional power devices, and has the advantages of convenient integration and low modification cost. At the same time, the pneumatic drive component is linked with the controller 3, which can accurately respond to the stroke command of the controller 3 and drive the piston 6 to rise and fall smoothly, ensuring the synchronization of adsorption and dispensing actions. Moreover, the flexible output characteristics of the pneumatic drive can avoid hard wear on the cavity 11 and itself when the piston 6 moves, thus extending the service life of the equipment.

[0023] Specifically, piston 6 is driven by a cylinder and also includes a micro cylinder. The piston rod of the micro cylinder is fixedly connected to the top of piston 6, and the micro cylinder is electrically connected to controller 3.

[0024] In this embodiment, the micro cylinder drive features stable power output and high stroke control precision, providing a constant and controllable axial driving force for the piston 6, ensuring that the piston 6 can quickly form a stable negative pressure during adsorption and accurately break the vacuum during sheet release; its electrical connection with the controller 3 enables automated start-stop and stroke adjustment, adapting to high-frequency bonding operation scenarios, while the compact structure of the micro cylinder can reduce the overall size of the equipment and improve the spatial adaptability of the equipment.

[0025] Specifically, piston 6 adopts a screw drive method and also includes a micro screw and a drive motor. The micro screw is threadedly connected to the top of piston 6, the output shaft of the drive motor is drivenly connected to the micro screw, and the drive motor is electrically connected to controller 3.

[0026] In this embodiment, the screw drive method relies on the self-locking characteristics and high precision advantages of the screw drive to achieve micron-level control of the piston 6 displacement, meeting the stroke requirements of ultra-precision bonding operations; the linkage between the drive motor and the controller 3 can achieve stepless adjustment of the piston 6 lifting speed, adapting to the adsorption needs of products of different materials and weights. At the same time, the low-loss characteristics of the screw drive can reduce the maintenance cost of long-term operation of the equipment and improve the durability of the equipment.

[0027] Specifically, there are two piston limiting magnetic rings 8, which are arranged at intervals along the axial direction of the cavity 11, and are used to limit the maximum and minimum stroke of the piston 6 respectively.

[0028] In this embodiment, the design of the dual-piston limiting magnetic ring 8 constructs a bidirectional limiting mechanism for the movement of the piston 6. The upper magnetic ring can prevent the piston 6 from rising excessively, which would lead to insufficient negative pressure in the cavity 11 and poor product adsorption. The lower magnetic ring can prevent the piston 6 from falling excessively, which would cause positive pressure airflow to impact the product or damage the suction cup 7. At the same time, the non-contact limiting characteristic of the magnetic ring will not cause resistance or wear to the movement of the piston 6, ensuring the smooth operation of the equipment. It can also provide a clear stroke node for the position sensor 10 through magnetic signals, thereby improving control accuracy.

[0029] Specifically, suction cup 7 is an anti-static silicone suction cup, and the adsorption end face of suction cup 7 is provided with anti-slip micro-protrusions.

[0030] In this embodiment, the antistatic silicone suction cup 7 possesses excellent elasticity and sealing properties, allowing it to closely adhere to the surface of products of different shapes, ensuring adsorption stability. It can also effectively release static electricity, preventing electrostatic discharge from damaging sensitive products such as semiconductor chips and precision optical lenses. The anti-slip micro-textures on the adsorption end face can increase the contact friction between the suction cup 7 and the product, preventing the product from sliding or falling off during the transfer process. At the same time, the wear-resistant properties of the silicone material can extend the replacement cycle of the suction cup 7, reducing consumable costs.

[0031] Specifically, a one-way valve is also provided on the common pipe 5, and the direction of conduction of the one-way valve is from the exchange valve 4 to the cavity 11 where the piston 6 is located.

[0032] In this embodiment, the addition of a one-way valve creates a one-way protective barrier for airflow, which can effectively prevent the airflow in the cavity 11 from flowing back to the exchange valve 4 and the negative pressure pipeline 1 and positive pressure pipeline 2, thus preventing residual grease, water vapor, and fine dust in the pipeline from entering the cavity 11 and contaminating the product due to backflow. At the same time, the one-way valve can maintain the stability of the air pressure inside the cavity 11, prevent negative pressure leakage during the negative pressure adsorption stage, and prevent a sudden drop in air pressure during the positive pressure vacuum breaking stage, ensuring the reliability of adsorption and tablet release operations, and further enhancing the cleanliness protection capability of the equipment.

[0033] Specifically, controller 3 is a programmable logic controller. Controller 3 is also equipped with a touch screen and an emergency stop button. The touch screen is used to display pressure parameters and piston 6 position parameters, and the emergency stop button is used to cut off the power to the equipment in an emergency.

[0034] In this embodiment, the programmable logic controller 3 can store multiple sets of operating parameters to adapt to the adsorption and unloading requirements of different products, and has strong compatibility and scalability; the touch screen can realize the visual setting of parameters and real-time monitoring of equipment operation status, which is convenient for operators to quickly debug and troubleshoot; the emergency stop button provides safety protection for equipment and products, and can immediately cut off power in emergency situations such as equipment abnormality and product displacement, so as to avoid equipment damage and product scrapping and improve the safety of the operation process.

[0035] Working principle and usage process of this invention: The piston-barrier vacuum adsorption positive pressure vacuum cleaning pen, based on the principle of a syringe, completes its work through a closed-loop logic of "controller command - pipeline switching - piston linkage - sensor feedback". Its complete and detailed workflow is as follows: Before the equipment initialization and parameter preset operation, the operator can use the touch screen of the controller 3 to preset the negative pressure target of vacuum adsorption, the lifting stroke range of piston 6 and the lifting speed parameters according to the material, weight and cleanliness requirements of the product to be transferred. After the parameters are set, the controller 3 will automatically verify the rationality of the parameters. After the verification is passed, it will enter the standby state. At this time, the exchange valve 4 is in the open circuit state, the piston 6 is reset to the initial position of the cavity 11, and the pressure sensor 9 begins to collect the reference air pressure data in the common pipeline 5 in real time. After receiving the tablet removal command, the controller 3 sends a negative pressure path switching signal to the exchange valve 4. The valve core inside the exchange valve 4 rotates, completing the connection with the negative pressure pipeline 1 and simultaneously cutting off the connection with the positive pressure pipeline 2. The negative pressure airflow in the negative pressure pipeline 1 enters the common pipeline 5 through the exchange valve 4. The pressure sensor 9 feeds back the negative pressure data in the pipeline to the controller 3 in real time. When the negative pressure reaches the preset initial threshold, the controller 3 sends an upward command to the driving component of the piston 6. The driving component drives the piston 6 to rise axially along the cavity 11. During the product adsorption and negative pressure holding process, the piston 6 rises, and its relative movement with the cavity 11 creates a negative pressure suction effect similar to that of a syringe, and the negative pressure at the suction cup 7 gradually increases. When the piston 6 rises past the upper piston limit magnetic ring 8, the position sensor 10 captures the magnetic signal and feeds it back to the controller 3. The controller 3 instructs the drive to stop. Subsequently, the pressure sensor 9 continuously monitors the negative pressure value. When the negative pressure reaches the preset target value, the controller 3 instructs the exchange valve 4 to maintain the negative pressure passage state, and at the same time, the drive locks the position of the piston 6, so that the suction cup 7 maintains a stable negative pressure. At this time, when the suction cup 7 is aligned with the product to be transferred, the product will be firmly adsorbed on the end face of the suction cup 7. The product transfer and negative pressure monitoring suction pen, under the operation of an external robotic arm or manual operation, transfers the adsorbed product to the designated target position. During the transfer process, the pressure sensor 9 continuously feeds back the negative pressure data in the pipeline to the controller 3. If the negative pressure value is lower than the preset threshold due to pipeline leakage or other reasons, the controller 3 will automatically instruct the exchange valve 4 to increase the opening of the negative pressure passage to replenish the negative pressure to the target value, ensuring that the product does not fall off or shift during the transfer process. After the positive pressure path is switched and the piston descends to the target position, the operator confirms that the product is accurately aligned and sends a release command to the controller 3. The controller 3 first commands the exchange valve 4 to cut off the negative pressure path, and then switches to the path connected to the positive pressure pipeline 2. The positive pressure airflow in the positive pressure pipeline 2 enters the cavity 11 through the exchange valve 4 and the common pipeline 5. At the same time, the controller 3 sends a descent command to the drive unit, and the drive unit drives the piston 6 to descend axially along the cavity 11. During the vacuum breaking and product placement process, the piston 6 descends, gradually compressing the internal space of the cavity 11, and the negative pressure environment at the suction cup 7 is gradually broken. When the piston 6 descends to the preset position between the two piston limiting magnetic rings 8, the position sensor 10 sends a signal to the controller 3, and the controller 3 instructs the drive to stop. At this time, the negative pressure at the suction cup 7 is completely broken, and the product is placed stably at the target position under its own weight or slight thrust. Moreover, the blocking effect of the piston 6 prevents the positive pressure airflow from directly contacting the product, thus avoiding contamination by impurities. After the equipment resets and completes the wafer loading in the standby cycle, the controller 3 instructs the exchange valve 4 to return to the open circuit state. At the same time, it instructs the drive unit to drive the piston 6 to reset to the initial position. The pressure sensor 9 and the position sensor 10 reset synchronously, and the equipment enters the standby state for the next work cycle. If an emergency occurs during operation, such as negative pressure abnormality, piston 6 stroke deviation, or product misalignment, the operator can press the emergency stop button. The controller 3 will immediately cut off all power paths and lock the equipment to prevent equipment damage and product scrapping.

[0036] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve any improvement to the software and methods.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A piston-barrier vacuum adsorption positive pressure vacuum cleaning pen, characterized in that, It includes a negative pressure pipeline (1), a positive pressure pipeline (2), a controller (3), an exchange valve (4), a common pipeline (5), a piston (6), a suction cup (7), a piston limiting magnetic ring (8), a pressure sensor (9), a position sensor (10), and a cavity (11). The first port of the exchange valve (4) is connected to the output end of the negative pressure pipeline (1), the second port of the exchange valve (4) is connected to the output end of the positive pressure pipeline (2), the third port of the exchange valve (4) is connected to the input end of the common pipeline (5), the output end of the common pipeline (5) is connected to the input end of the cavity (11), and the piston (6) is slidably connected inside the cavity (11). The piston limiting magnetic ring (8) is embedded outside the cavity (11), and the suction cup (7) is fixedly connected to the output end of the cavity (11); The pressure sensor (9) is installed inside the cavity (11) and is electrically connected to the signal input terminal of the controller (3). The position sensor (10) is installed inside the cavity (11) and is electrically connected to the signal input terminal of the controller (3). The exchange valve (4) is electrically connected to the signal output terminal of the controller (3). The piston (6) can move axially within the cavity (11). Vacuum adsorption and positive pressure vacuum breaking are achieved by switching the piston (6) in conjunction with the pipeline. The piston (6) also prevents the positive pressure air from directly contacting the product adsorbed by the suction cup (7).

2. The piston-barrier vacuum adsorption positive pressure vacuum cleaning pen according to claim 1, characterized in that, The piston (6) is pneumatically driven and also includes a pneumatic drive component. The pneumatic drive component is connected to the top of the piston (6) via a transmission connection and is electrically connected to the controller (3).

3. The piston-barrier vacuum adsorption positive pressure vacuum cleaning pen according to claim 1, characterized in that, The piston (6) is driven by a cylinder and also includes a micro cylinder. The piston rod of the micro cylinder is fixedly connected to the top of the piston (6), and the micro cylinder is electrically connected to the controller (3).

4. The piston-barrier vacuum adsorption positive pressure vacuum cleaning pen according to claim 1, characterized in that, The piston (6) is driven by a screw and also includes a micro screw and a drive motor. The micro screw is threaded to the top of the piston (6), the output shaft of the drive motor is driven to the micro screw, and the drive motor is electrically connected to the controller (3).

5. The piston-barrier vacuum adsorption positive pressure vacuum cleaning pen according to claim 1, characterized in that, The number of piston limiting magnetic rings (8) is two. The two piston limiting magnetic rings (8) are arranged at intervals along the axial direction of the cavity (11) and are used to limit the maximum stroke and minimum stroke of the piston (6) respectively.

6. The piston-barrier vacuum adsorption positive pressure vacuum cleaning pen according to claim 1, characterized in that, The suction cup (7) is an anti-static silicone suction cup, and the adsorption end face of the suction cup (7) is provided with anti-slip micro-protrusions.

7. The piston-barrier vacuum adsorption positive pressure vacuum cleaning pen according to claim 1, characterized in that, The common pipe (5) is also equipped with a one-way valve, and the one-way valve is directed from the exchange valve (4) to the cavity (11) where the piston (6) is located.

8. The piston-barrier vacuum adsorption positive pressure vacuum cleaning pen according to claim 1, characterized in that, The controller (3) is a programmable logic controller. The controller (3) is also equipped with a touch screen and an emergency stop button. The touch screen is used to display pressure parameters and piston (6) position parameters, and the emergency stop button is used to cut off the power of the equipment in an emergency.

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