A feeding device for automated silk printing

Abstract

The utility model belongs to the technical field, concretely relates to a kind of feeding device for automatic silk screen printing, including support, and the support is movably provided with grabbing mechanism, and the top of the support is provided with guide rail;The grabbing mechanism includes mobile seat, and the mobile seat is movably arranged at the guide rail, and the two sides of the mobile seat are provided with guide strip;The mobile seat is liftable by the guide strip and is provided with lifting plate, and the lifting plate is connected with two symmetrical L-shaped mounting plates by bolt, and the mounting plate is provided with reinforcing rib along length direction, and one end of which is connected with the mobile seat by bolt;The fixed plate is detachably mounted with several vacuum chuck bodies for grabbing material by the mounting hole, and the bottom of the support is provided with a bearing platform for carrying material;The support extends above work platform.

Description

Technical Field

[0001] This utility model belongs to the field of screen printing technology, specifically relating to a feeding device for automated screen printing. Background Technology

[0002] In automated screen printing production, the material loading process is a crucial step determining production efficiency and quality. Existing loading devices mostly employ fixed robotic arms or simple vacuum suction cup tables, typically fixing the suction cups in a specific position, making it impossible to adjust according to the shape and size of the materials to be transported (such as circuit boards of different sizes, glass substrates, etc.). This fixed structure results in poor equipment versatility; changing production specifications often requires downtime to redesign the fixtures or replace the entire suction cup module, which is time-consuming and labor-intensive. Furthermore, traditional devices lack effective guiding mechanisms during lifting, easily causing the suction cups to tilt, leading to unstable material adhesion or even drop and damage. Simultaneously, existing vacuum control systems are often quite simple, lacking intelligent air-blowing demolding functions, and materials are prone to residual static electricity or adhesion upon release, affecting the accuracy of subsequent processes.

[0003] However, the aforementioned existing technologies have significant limitations in practical applications: firstly, the suction cup layout is not adjustable, making it difficult to adapt to the flexible production needs of multiple varieties and small batches; secondly, the lifting motion lacks high-precision guidance, posing a risk of wobbling; and thirdly, the control logic is simplistic, lacking an efficient automatic demolding mechanism, which limits the improvement of production cycle time. Therefore, there is an urgent need to develop an automated screen printing feeding device that can flexibly adjust the suction cup layout, has stable lifting guidance, and intelligent vacuum control. Utility Model Content

[0004] This utility model discloses a feeding device for automated screen printing, which mainly solves the problem of the lack of adaptability and flexibility of current traditional feeding devices.

[0005] To achieve the aforementioned objective, this utility model provides a feeding device for automated screen printing, comprising a support, a gripping mechanism movably mounted on the support, and a guide rail provided on the top of the support. The gripping mechanism includes a movable base, which is movably disposed on the guide rail, and guide strips are provided on both sides of the movable base; The movable seat is equipped with a lifting plate that can be raised and lowered via the guide bar. The lifting plate is connected to two symmetrically arranged L-shaped mounting plates by bolts. The mounting plates are provided with reinforcing ribs along their length, and the shorter end of the mounting plate is connected to the movable seat by bolts. The lifting plate is provided with a number of sets of screw holes, and a fixing plate is installed between the two mounting plates. The fixing plate is provided with a number of rows and columns of mounting holes. The fixing plate is detachably mounted with several vacuum suction cup bodies for gripping materials through the mounting holes. Each of the several vacuum suction cup bodies is connected to a distributor through a pipe. The bottom of the distributor is provided with a main vacuum interface, and the distributor is connected to the vacuum generator through this interface. The vacuum generator is connected to a solenoid valve for controlling air intake and exhaust. Both the solenoid valve and the vacuum controller can be detached and installed on the side of the lifting plate. A drive device is provided between the lifting plate and the movable seat, and the drive device, solenoid valve and vacuum controller are all connected to a control panel. The bottom of the support is provided with a support platform for supporting materials; the support extends above the working platform.

[0006] Preferably, the mounting holes on the fixing plate are arranged in a matrix, and the number and position of the vacuum suction cup bodies can be adjusted according to the size and shape of the material by tightening or loosening the fasteners at the corresponding mounting holes.

[0007] Preferably, the guide bar is a linear guide rail or an optical axis, and the two ends of the lifting plate are provided with sliders or bearing sleeves that cooperate with the guide bar to ensure that the lifting plate can only reciprocate in the vertical direction.

[0008] Preferably, the driving device is a cylinder or an electric push rod, and the control panel is used to set the lifting height, moving speed and vacuum holding time.

[0009] Preferably, the solenoid valve is a two-position three-way or three-position five-way valve, used to switch the vacuum generator between the open and closed states of the atmosphere, so as to realize the adsorption of the suction cup and the blowing demolding.

[0010] Preferably, the long side of the L-shaped mounting plate is arranged parallel to the fixing plate, and the reinforcing ribs are distributed along the long side of the L-shaped mounting plate.

[0011] The technical solution provided by this utility model has at least the following technical effects: Highly flexible layout adaptation: The innovative modular design of "matrix screw holes + L-shaped mounting plate" allows users to freely select and adjust the number and distribution of vacuum suction cups according to the specific shape and size of the material. It can adapt to various production tasks without changing hardware, greatly improving the versatility and production efficiency of the equipment.

[0012] Stable bidirectional motion control: The composite guiding structure of "guide rail + guide bar + lifting plate" ensures high precision and stability during the horizontal movement of the moving seat and the vertical lifting of the lifting plate, effectively avoiding material slippage or damage caused by suction cup tilting and improving gripping reliability.

[0013] Intelligent vacuum cycle control: Integrating a vacuum generator, solenoid valves, and control panel, it achieves a fully automated process of "adsorption-lifting-translation-descent-air blowing demolding". In particular, the introduction of the air blowing demolding function effectively solves the material adhesion problem, shortens the single-piece operation cycle, and realizes efficient and continuous automated production.

[0014] Compact structure and easy maintenance: The vacuum generator, solenoid valve and controller are centrally installed on the side of the lifting plate and adopt a detachable design, which not only saves space, but also facilitates daily maintenance and troubleshooting, and reduces the operating cost of the equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model embodiment; Figure 2 This is a partial side view of an embodiment of the present utility model. Key reference numerals: 10. Bracket; 11. Movable seat; 12. L-shaped mounting plate; 13. Fixed plate; 14. Lifting plate; 15. Guide bar; 16. Sliding block; 17. Reinforcing rib; 20. Load-bearing platform; 30. Working platform; Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0018] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] Please refer to Figures 1-2This utility model provides a feeding device for automated screen printing, including a bracket 10. A gripping mechanism is movably mounted on the bracket 10. A guide rail is provided on the top of the bracket 10. The gripping mechanism includes at least a portion of a movable seat 11 movably mounted on the guide rail. Guide bars 15 are provided on both sides of the movable seat 11. A lifting plate 14 is vertically mounted on the movable seat 11 via the guide bars 15. The lifting plate 14 is bolted to two symmetrically arranged mounting plates. The mounting plates are L-shaped and have reinforcing ribs 17 along their length, with the shorter end connected to... The movable base 11 is connected by bolts. The lifting plate 14 has several sets of screw holes, allowing the installation position of the mounting plate to be adjusted as needed. A fixed plate 13 is installed between the two mounting plates. The fixed plate 13 has several rows and columns of mounting holes. Several vacuum suction cup bodies can be detachably installed on the fixed plate 13 through the mounting holes. Each suction cup body is connected to a distributor through a pipe. The bottom of the distributor has a main vacuum interface, through which the distributor is connected to a vacuum generator. The other end of the vacuum generator is connected to a solenoid valve for controlling the vacuum generator's suction and blowing functions. The aforementioned vacuum controller and solenoid valve can be detachably installed on the side of the lifting plate 14. A drive device for driving the lifting plate 14 to move up and down is provided between the lifting plate 14 and the movable base 11. Both the drive device and the solenoid valve are connected to a control panel. A support platform 20 is provided at the bottom of the support 10 for carrying materials that need to be transported by vacuum suction cups. Another part of the support 10 extends to the top of the working platform 30. Before work, the number and position of vacuum suction cups can be selected according to the specific shape of the material. During work, the moving seat 11 is driven by the motor to move, thereby driving the fixed plate 13 to move. The lifting plate 14 is driven to move downward by the drive device so that the vacuum suction cups come into contact with the material surface. After the negative pressure is generated by the solenoid valve and the vacuum generator to suck up the material, the lifting plate 14 rises. Then the moving seat 11 is driven by the motor to move to the top of the working platform 30. The lifting plate 14 falls, the solenoid valve coil is de-energized, and at the same time, an airflow in one direction is passed to break the vacuum and the suction cups release the material.In this embodiment, the bracket 10 is welded from high-strength carbon steel and coated with anti-corrosion paint; the guide rail is a high-precision linear guide rail (model: HIWINHGH25CA) to ensure smooth horizontal movement; the movable seat 11 is CNC machined from aluminum alloy (model: 6061-T6), and the guide bars 15 installed on both sides are chrome-plated hard shafts (diameter Φ12mm); the lifting plate 14 is also made of aluminum alloy, with linear bearing sleeves at both ends, which are fitted onto the guide bars 15 to achieve frictionless lifting; the L-shaped mounting plate 12 is made of stainless steel sheet by stamping, with a long side thickness of 3mm and a short side thickness of 5mm, and the reinforcing rib 17 adopts a triangular rib structure to increase rigidity; the fixing plate 13 is an 8mm thick stainless steel plate, with a matrix mounting hole center distance of 20mm and a hole diameter of M6; the vacuum suction cup body is a standard suction cup made of nitrile rubber (diameter Φ20mm-Φ50mm optional); the distributor is made of brass, and the total vacuum interface specification is G1 / 4, using a Venturi tube type (model: Festo). The VFAB-L-M5C model has a flow rate of 200L / min. The solenoid valve is a two-position, three-way normally closed type (model: SMC SY3140-5LZD). The drive device is an electric actuator (stroke 200mm, thrust 500N). The control panel uses a PLC (Programmable Logic Controller) with a touchscreen human-machine interface. The working principle is as follows: The operator loosens the bolts on the fixing plate 13 according to the material size, installs the vacuum suction cup in the corresponding mounting hole, adjusts it to the optimal suction point, and locks it. After starting the equipment, the motor drives the moving seat 11 to move along the guide rail to the starting position above the carrying platform 20. The electric actuator drives the lifting plate 14 to descend, and the suction cup contacts the material surface. The solenoid valve is energized, the vacuum generator produces negative pressure, and the suction cup sucks up the material. The lifting plate 14 rises, and the moving seat 11 moves above the working platform 30. The lifting plate 14 descends again. The solenoid valve is de-energized, switching the air path, and compressed air is blown back into the suction cup, breaking the vacuum state and releasing the material. This implementation method achieves flexible grasping and efficient transmission of materials of various specifications through modular design and intelligent control.

[0021] The mounting holes on the fixing plate 13 are arranged in a matrix. The number and position of the vacuum suction cup bodies can be adjusted according to the size and shape of the material by tightening or loosening the fasteners at the corresponding mounting holes. In this embodiment, the center distance of the mounting holes on the fixing plate 13 is set to 20mm, forming a regular grid distribution. Users can select 4, 6, or 8 suction cups to form a rectangular array according to the diagonal length of the PCB board or glass sheet, or distribute the suction cups irregularly according to the shape of the irregular material. In practical applications, the spacing of the mounting holes can also be adjusted to 25mm or 30mm to accommodate larger or denser suction cup layouts. This embodiment does not limit this. This implementation, through the matrix screw hole design, gives the equipment extremely high flexibility, allowing it to quickly adapt to various production tasks without changing the fixtures, significantly reducing changeover costs and time.

[0022] The guide bar 15 is a linear guide or optical axis. The lifting plate 14 has sliders 16 or bearing sleeves at both ends that cooperate with the guide bar 15, ensuring that the lifting plate 14 can only reciprocate in the vertical direction. In this embodiment, the guide bar 15 is a double-row ball-center self-aligning linear guide, and the lifting plate 14 is equipped with linear bearings with dustproof rings at both ends. The clearance between the bearing inner diameter and the guide shaft outer diameter is controlled within 0.02mm. This design ensures that the lifting plate 14 maintains strict verticality when subjected to the suction force of the suction cup and the weight of the material, avoiding the situation where one side of the suction cup contacts the material first or last due to tilting, thus preventing material deformation or damage. In practical applications, the guide bar 15 can also be replaced with a ball screw pair cooperating with a linear module; this embodiment does not limit this. This implementation greatly improves the stability and safety of the gripping process through a high-precision guiding structure.

[0023] In this embodiment, a fast-response solenoid valve is selected, with a switching time of less than 5ms. The air path is designed as follows: when energized, the vacuum generator evacuates air, and the suction cup adsorbs the material; when de-energized, the solenoid valve switches the air path, and compressed air is blown into the suction cup from the distributor in the opposite direction, instantly breaking the negative pressure and using the airflow impact force to detach the material from the suction cup. This blowing process is precisely controlled by the PLC and is typically executed 100ms after the lifting plate 14 reaches above the working platform 30 and stops. In practical applications, the blowing pressure can be adjusted by a pressure reducing valve to accommodate materials of different weights and materials; this embodiment does not limit this. This implementation method, through positive and negative pressure switching control, completely solves the material adhesion problem, improves demolding speed and reliability, and avoids secondary contamination.

[0024] In this embodiment, the control panel integrates a PLC program. The operator can input material size parameters on the touchscreen, and the system automatically calculates suction cup layout suggestions (auxiliary function) and presets time parameters for each action (e.g., descent speed 0.5m / s, adsorption hold 0.5s, blowing time 0.3s). The control panel also has a fault diagnosis function, automatically alarming and stopping the machine when the vacuum pressure is insufficient or the sensor malfunctions. In practical applications, the control panel can also be connected to an external industrial computer for upper-level monitoring and data traceability; this embodiment does not limit this aspect. This implementation achieves fully automated operation through intelligent control, significantly reducing manual intervention and improving production efficiency and product consistency.

[0025] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A feeding device for automated screen printing, comprising a support (10), wherein a gripping mechanism is movably mounted on the support (10), and a guide rail is provided on the top of the support (10); Its features are: The gripping mechanism includes a movable seat (11), which is movably disposed on the guide rail, and guide strips (15) are provided on both sides of the movable seat (11). The movable seat (11) is equipped with a lifting plate (14) via the guide bar (15). The lifting plate (14) is connected to two symmetrically arranged L-shaped mounting plates (12) by bolts. The mounting plates are provided with reinforcing ribs (17) along the length direction, and the shorter end is connected to the movable seat (11) by bolts. The lifting plate (14) is provided with a number of screw holes, and a fixing plate (13) is installed between the two mounting plates. The fixing plate (13) is provided with a number of rows and columns of mounting holes. The fixing plate (13) is detachably mounted with several vacuum suction cup bodies for gripping materials through the mounting holes. Each vacuum suction cup body is connected to a distributor through a pipe. The bottom of the distributor is provided with a main vacuum interface, and the distributor is connected to the vacuum generator through this interface. The vacuum generator is connected to a solenoid valve for controlling air intake and air blowing. Both the solenoid valve and the vacuum controller can be detached and installed on the side of the lifting plate (14). A drive device is provided between the lifting plate (14) and the movable seat (11), and the drive device, solenoid valve and vacuum controller are all connected to a control panel; The bottom of the support (10) is provided with a support platform (20) for carrying materials; the support (10) extends above the working platform (30).

2. The feeding device for automated screen printing according to claim 1, characterized in that: The mounting holes on the fixing plate (13) are arranged in a matrix. The number and position of the vacuum suction cup bodies can be adjusted according to the size and shape of the material by tightening or loosening the fasteners at the corresponding mounting holes.

3. The feeding device for automated screen printing according to claim 1, characterized in that: The guide bar (15) is a linear guide or optical axis. The two ends of the lifting plate (14) are provided with sliders (16) or bearing sleeves that cooperate with the guide bar (15) to ensure that the lifting plate (14) can only reciprocate in the vertical direction.

4. The feeding device for automated screen printing according to claim 1, characterized in that: The drive device is a cylinder or an electric push rod, and the control panel is used to set the lifting height, moving speed and vacuum holding time.

5. A feeding device for automated screen printing according to claim 1, characterized in that: The solenoid valve is a two-position three-way or three-position five-way valve, used to switch the vacuum generator to be connected to or closed to the atmosphere, so as to realize the adsorption of the suction cup and the blowing demolding.

6. The feeding device for automated screen printing according to claim 1, characterized in that: The long side of the L-shaped mounting plate (12) is arranged parallel to the fixing plate (13), and the reinforcing ribs (17) are distributed along the long side of the L-shaped mounting plate (12).

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