Automatic feeding screen printing machine for printed circuit board

Abstract

The utility model discloses a printed circuit board automatic feeding screen printing machine which comprises a groove plate, an installation cover is installed on the upper portion of the groove plate, a lead screw rod is installed in the installation cover through a bearing, the side wall of the lead screw rod is connected with a lead screw sleeve in a sleeved mode, and the side wall of the lead screw sleeve is fixedly connected with a movable plate in a sleeved mode. A guide rod is slidably connected to one side of the moving plate in a sleeving mode, the two ends of the guide rod are fixedly connected with the two sides of the interior of the mounting cover correspondingly, an ink storage box and two scraping plates are installed on the lower portion of the moving plate, a silk screen is fixedly installed in the mounting cover, and a plurality of spraying heads penetrate through the lower portion of the ink storage box; an ink box is installed on the upper portion of the installation cover, and a connecting hose penetrates through the end face of the ink box. The automatic feeding screen printing machine for the printed circuit board has the advantages that the lifting plate is adopted, feeding and discharging of the circuit board can be completed in a labor-saving mode through the arranged lifting plate, and the use practicability of the automatic feeding screen printing machine for the printed circuit board is improved.

Description

Technical Field

[0001] This utility model relates to the field of circuit board screen printing technology, specifically to an automatic feeding screen printing machine for printed circuit boards. Background Technology

[0002] Printed circuit boards (PCBs) are important electronic components. They serve as the support for electronic components and the carrier for the electrical interconnection of these components. They are one of the most important components in the electronics industry. The production process of PCBs requires a screen printing process, which is completed using a screen printing machine. In practice, screen printing machines have advantages such as simple operation, stable structure, and stable screen printing.

[0003] The prior art discloses a circuit board screen printing device with application number CN202322016286.X. In the above-mentioned utility model, the loading and unloading of circuit boards requires manual operation by the operator. This operation involves many steps, increases the physical exertion of the operator, and reduces the practicality of the utility model. At the same time, the spiral tube is a flexible tube structure. When the spiral tube loosens and contacts the screen printing mesh, it will affect the squeegee's ability to scrape ink, which poses a potential risk to the continuous screen printing of this utility model. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an automatic feeding screen printing machine for printed circuit boards, which has the advantages of labor-saving circuit board loading and unloading and preventing loose ink discharge channels from falling onto the screen printing mesh, thereby solving the problems mentioned in the background technology.

[0006] (II) Technical Solution

[0007] To achieve the advantages of labor-saving circuit board loading and unloading and preventing loose ink discharge pipes from falling onto the screen printing mesh, the specific technical solution adopted by this utility model is as follows: An automatic screen printing machine for feeding printed circuit boards includes a grooved plate. A mounting cover is installed on the upper part of the grooved plate, and a screw lever is installed inside the mounting cover via a bearing. A screw rod sleeve is fitted onto the side wall of the screw lever. A movable plate is fixedly fitted onto the side wall of the screw rod sleeve, and a guide rod is slidably fitted onto one side of the movable plate. The two ends of the guide rod are respectively fixedly connected to the inner sides of the mounting cover. An ink storage box and two sets of scrapers are installed at the lower part of the movable plate. A screen printing mesh is fixedly installed inside the mounting cover. Multiple printheads pass through the lower part of the ink storage box. An ink cartridge is installed on the upper part of the cover. A connecting hose passes through the end face of the ink cartridge, and one end of the connecting hose is inserted into the interior of the ink storage box. A solenoid valve is provided on the side wall of the connecting hose, and a connecting plate is sleeved on the side wall of the connecting hose. A forward and reverse motor is installed on the other side of the cover, and the output end of the forward and reverse motor is connected to a lead lever through a coupling. An electric telescopic rod passes through the inner bottom surface of the grooved plate, and a lifting plate is installed on the upper end of the electric telescopic rod. A pressure sensor and a laser displacement sensor are installed on the inner bottom surface of the grooved plate. Installation slots are opened on both sides of the inner surface of the grooved plate, and belt conveyors are installed through both sets of installation slots. An installation frame plate is fixedly installed inside the grooved plate.

[0008] Furthermore, the lead lever and the lead screw thread are mutually engaged.

[0009] Furthermore, the inner wall of the socket plate is provided with a threaded through hole, and a fastening bolt passes through the inside of the threaded through hole. Two sets of crossbars slide through the side wall of the socket plate, and the two ends of the two sets of crossbars are respectively fixedly connected to the inner sides of the mounting cover. The side walls of the two sets of crossbars are all fitted with telescopic springs.

[0010] Furthermore, the threaded through hole and the fastening bolt thread are mutually engaged.

[0011] Furthermore, a controller is installed on one side of the mounting cover, and the controller is electrically connected to the solenoid valve, the forward and reverse motor, the electric telescopic rod, the pressure sensor, the two sets of belt conveyors, and the laser displacement sensor via wires.

[0012] Furthermore, a support frame is installed on the lower part of the grooved plate.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides an automatic feeding screen printing machine for printed circuit boards, which has the following beneficial effects:

[0015] (1) This utility model is equipped with a lifting plate. When using the automatic feeding screen printing machine for printed circuit boards, multiple circuit boards are placed on a set of belt conveyors on the left side. The controller is then used to make the two sets of belt conveyors work. When a set of circuit boards moves to the upper part of the lifting plate, the next set of circuit boards will push the previous set of circuit boards to move. When the laser sensor detects the gap between two adjacent sets of circuit boards, it will send a signal to the controller. The controller will then extend the electric telescopic rod and stop the two sets of belt conveyors. The lifting plate can drive a set of circuit boards to move up. During this process, the mounting frame plate can limit the circuit board. When the circuit board contacts the screen printing screen, the controller is used to make the forward and reverse motors work and open and close the solenoid valves. When the output end of the forward and reverse motors drives the wire lever to rotate clockwise and counterclockwise, the wire lever and the screw sleeve are engaged with each other. The clockwise and counterclockwise rotating wire lever can push the screw sleeve to move left and right. The lead screw sleeve can drive the moving plate, ink reservoir, and two sets of scrapers to move left and right. The ink inside the ink reservoir can enter the ink reservoir through the connecting hose. The ink is finally sprayed out through multiple sets of nozzles and lands on the screen printing screen. The two sets of scrapers moving left and right can scrape the ink to complete the screen printing process of the circuit board. After screen printing is completed, the controller stops the forward and reverse motors, closes the solenoid valve, and shortens the electric telescopic rod. The lifting plate can drive the screen-printed circuit board to move down. When the lifting plate presses the pressure sensor, it can send a signal to the controller. At this time, the controller makes the two sets of belt conveyors work. The next set of circuit boards can push the screen-printed circuit board to the right, so that it finally lands on the right set of belt conveyors. Repeat the above operation to automatically load and unload multiple sets of circuit boards. With the lifting plate, the loading and unloading of circuit boards can be completed labor-savingly, which improves the practicality of the automatic feeding screen printing machine for printed circuit boards.

[0016] (2) This utility model is equipped with a socket plate. According to the above operation, the controller is used to make the forward and reverse motor work. When the output end of the forward and reverse motor drives the screw lever to rotate clockwise and counterclockwise, the clockwise and counterclockwise rotating screw lever can push the screw sleeve to move left and right. The left and right moving screw sleeve can drive the moving plate, ink storage box and two sets of scrapers to move left and right. During this process, the ink storage box can pull the connecting hose. When the ink storage box pulls the connecting hose to the right, the connecting hose can drive the socket plate to move to the right. The right-moving socket plate can squeeze the two sets of telescopic springs. When the ink storage box pulls the connecting hose to the left, the two sets of telescopic springs can push the socket plate under their own elastic force, ensuring that the socket plate can pull the side wall of the connecting hose and preventing the connecting hose from falling onto the screen due to looseness. By setting the socket plate, it is possible to prevent the loose ink discharge pipe from falling onto the screen, which provides a guarantee for the continuous screen printing of the automatic feeding screen printing machine for printed circuit boards. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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.

[0018] Figure 1 This is a structural schematic diagram of an automatic feeding screen printing machine for printed circuit boards according to an embodiment of the present utility model;

[0019] Figure 2 This is a front view of an automatic screen printing machine for feeding printed circuit boards according to an embodiment of the present utility model;

[0020] Figure 3 According to the embodiments of this utility model Figure 1 Enlarged view of A in the middle;

[0021] Figure 4 According to the embodiments of this utility model Figure 1 Enlarged view of B in the middle;

[0022] Figure 5 According to the embodiments of this utility model Figure 1 A magnified view of C.

[0023] In the picture:

[0024] 1. Groove plate; 2. Mounting cover; 3. Lead screw lever; 4. Lead screw sleeve; 5. Moving plate; 6. Guide rod; 7. Ink reservoir; 8. Scraper; 9. Screen printing screen; 10. Ink cartridge; 11. Connecting hose; 12. Forward and reverse motor; 13. Electric telescopic rod; 14. Lifting plate; 15. Mounting frame plate; 16. Mounting through slot; 17. Belt conveyor; 18. Pressure sensor; 19. Laser displacement sensor; 20. Socket plate; 21. Crossbar; 22. Telescopic spring; 23. Fastening bolt; 24. Threaded through hole. Detailed Implementation

[0025] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0026] According to an embodiment of the present invention, an automatic feeding screen printing machine for printed circuit boards is provided.

[0027] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-5 As shown, an automatic feeding screen printing machine for printed circuit boards according to an embodiment of the present invention includes a grooved plate 1. A mounting cover 2 is installed on the upper part of the grooved plate 1. A wire lever 3 is mounted inside the mounting cover 2 via a bearing. A lead screw sleeve 4 is sleeved on the side wall of the wire lever 3. A movable plate 5 is fixedly sleeved on the side wall of the lead screw sleeve 4. A guide rod 6 is slidably sleeved on one side of the movable plate 5, and both ends of the guide rod 6 are fixedly connected to the inner sides of the mounting cover 2. An ink storage box 7 and two sets of scrapers 8 are installed at the lower part of the movable plate 5. A screen printing screen 9 is fixedly installed inside the mounting cover 2. Multiple nozzles pass through the lower part of the ink storage box 7. An ink cartridge 10 is installed at the upper part of the mounting cover 2. A connecting hose 11 passes through the end face of the ink cartridge 10, and one end of the connecting hose 11 is inserted into the interior of the ink storage box 7. A solenoid valve is provided on the side wall of the hose 11, and a connecting plate 20 is sleeved on the side wall of the hose 11. A forward and reverse motor 12 is installed on the other side of the mounting cover 2, and the output end of the forward and reverse motor 12 is connected to the screw lever 3 through a coupling. An electric telescopic rod 13 passes through the inner bottom surface of the groove plate 1, and a lifting plate 14 is installed at the upper end of the electric telescopic rod 13. A pressure sensor 18 and a laser displacement sensor 19 are installed on the inner bottom surface of the groove plate 1. Mounting slots 16 are opened on both sides of the inner surface of the groove plate 1, and belt conveyors 17 are installed through the two sets of mounting slots 16. A mounting frame plate 15 is fixedly installed inside the groove plate 1. With the lifting plate 14, the loading and unloading of circuit boards can be completed with less effort, improving the practicality of the automatic feeding screen printing machine for printed circuit boards.

[0028] In one embodiment, the lead lever 3 and the lead screw sleeve 4 are threadedly engaged to facilitate adjustment of the working position of the lead screw sleeve 4.

[0029] In one embodiment, the inner wall of the socket plate 20 is provided with a threaded through hole 24, and a fastening bolt 23 passes through the inside of the threaded through hole 24. Two sets of crossbars 21 slide through the side wall of the socket plate 20, and the two ends of the two sets of crossbars 21 are respectively fixedly connected to the inner sides of the mounting cover 2. The side walls of the two sets of crossbars 21 are all fitted with telescopic springs 22. Through the socket plate 20, the loose ink discharge pipe can be prevented from falling onto the screen printing screen 9, thus ensuring the continuous screen printing of the automatic feeding screen printing machine for printed circuit boards.

[0030] In one embodiment, the threaded through hole 24 and the fastening bolt 23 are threaded together, which facilitates the adjustment of the position of the fastening bolt 23.

[0031] In one embodiment, a controller is installed on one side of the mounting cover 2, and the controller is electrically connected to the solenoid valve, the forward and reverse motor 12, the electric telescopic rod 13, the pressure sensor 18, the two sets of belt conveyors 17 and the laser displacement sensor 19 via wires. The controller can be implemented by simple programming by those skilled in the art, which is common knowledge in the art. It is only used and not modified, so the control method and circuit connection will not be described in detail.

[0032] In one embodiment, a support frame is installed at the lower part of the groove plate 1, and the support frame serves to support the groove plate 1.

[0033] Working principle:

[0034] In actual use of the automatic PCB feeding screen printing machine, multiple PCBs are placed on a set of conveyor belts 17 on the left side. The controller then operates both sets of conveyor belts 17. When one set of PCBs moves to the top of the lifting plate 14, the next set of PCBs pushes the previous set. When the laser sensor detects the gap between two adjacent sets of PCBs, it sends a signal to the controller. The controller then extends the electric telescopic rod 13 and simultaneously stops both sets of conveyor belts 17. The lifting plate 14 can then move one set of PCBs upwards. During this process, the mounting frame 15 can limit the movement of this set of PCBs. When the PCB contacts the screen printing mesh 9, the controller activates the forward and reverse motors 12, simultaneously opening and closing the solenoid valves. The forward and reverse motors 12 then... When the output end drives the lead lever 3 to rotate clockwise and counterclockwise, due to the threaded engagement between the lead lever 3 and the lead screw sleeve 4, the clockwise and counterclockwise rotating lead lever 3 can push the lead screw sleeve 4 to move left and right. The left and right movement of the lead screw sleeve 4 can drive the moving plate 5, the ink storage box 7, and the two sets of scrapers 8 to move left and right. The ink inside the ink box 10 can enter the ink storage box 7 through the connecting hose 11. The ink is finally sprayed out through multiple nozzles and falls onto the screen printing screen 9. The two sets of scrapers 8 that move left and right can scrape the ink to complete the screen printing process of the circuit board. When the screen printing is completed, the controller stops the forward and reverse motor 12, closes the solenoid valve, and shortens the electric telescopic rod 13. The lifting plate 14 can drive the screen-printed circuit board to move down. When pressure sensor 18 is pressed, a signal is sent to the controller. The controller then activates two sets of conveyor belts 17. The next set of circuit boards can be pushed to the right after screen printing, eventually landing on the right-side conveyor belt 17. Repeating this operation allows for automatic loading and unloading of multiple sets of circuit boards. The lifting plate 14 allows for labor-saving loading and unloading of circuit boards, improving the practicality of the automatic board feeding screen printing machine. Furthermore, according to the above operation, the controller activates the reversible motor 12. When the output of the reversible motor 12 drives the lever 3 to rotate clockwise and counterclockwise, the clockwise and counterclockwise rotating lever 3 pushes the lead screw sleeve 4 to move left and right. 4 can drive the moving plate 5, ink storage box 7, and two sets of scrapers 8 to move left and right. During this process, the ink storage box 7 can pull the connecting hose 11. When the ink storage box 7 pulls the connecting hose 11 to the right, the connecting hose 11 can drive the socket plate 20 to the right. The right-moving socket plate 20 can squeeze the two sets of telescopic springs 22. When the ink storage box 7 pulls the connecting hose 11 to the left, the two sets of telescopic springs 22 can push the socket plate 20 under their own elastic force, ensuring that the socket plate 20 can pull the side wall of the connecting hose 11 and prevent the connecting hose 11 from falling onto the screen printing screen 9 due to slack. By setting the socket plate 20, it is possible to prevent the slack ink discharge pipe from falling onto the screen printing screen 9, thus ensuring the continuous screen printing of the automatic feeding screen printing machine for printed circuit boards.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., 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. An automatic screen printing machine for feeding printed circuit boards, comprising a grooved plate (1), characterized in that: A mounting cover (2) is installed on the upper part of the groove plate (1), and a screw lever (3) is installed inside the mounting cover (2) through a bearing. A screw sleeve (4) is sleeved on the side wall of the screw lever (3). A movable plate (5) is fixedly sleeved on the side wall of the screw sleeve (4), and a guide rod (6) is slidably sleeved on one side of the movable plate (5). The two ends of the guide rod (6) are fixedly connected to the two sides inside the mounting cover (2). An ink storage box (7) and two sets of scrapers (8) are installed on the lower part of the movable plate (5). A screen printing screen (9) is fixedly installed inside the mounting cover (2). Multiple sets of printheads pass through the lower part of the ink storage box (7). An ink box (10) is installed on the upper part of the mounting cover (2). A connecting hose (11) passes through the end face of the ink box (10), and one end of the connecting hose (11) is inserted into the ink storage box. Inside (7), a solenoid valve is provided on the side wall of the connecting hose (11), and a sleeve plate (20) is sleeved on the side wall of the connecting hose (11). A forward and reverse motor (12) is installed on the other side of the mounting cover (2), and the output end of the forward and reverse motor (12) is connected to the screw lever (3) through a coupling. An electric telescopic rod (13) is passed through the inner bottom surface of the groove plate (1), and a lifting plate (14) is installed at the upper end of the electric telescopic rod (13). A pressure sensor (18) and a laser displacement sensor (19) are installed on the inner bottom surface of the groove plate (1). Installation slots (16) are opened on both sides of the inside of the groove plate (1), and belt conveyors (17) are installed through the inside of both sets of installation slots (16). An installation frame plate (15) is fixedly installed inside the groove plate (1).

2. The automatic feeding screen printing machine for printed circuit boards according to claim 1, characterized in that, The lead lever (3) and the lead screw sleeve (4) are threadedly engaged.

3. The automatic feeding screen printing machine for printed circuit boards according to claim 1, characterized in that, The inner wall of the socket plate (20) is provided with a threaded through hole (24), and a fastening bolt (23) passes through the inside of the threaded through hole (24). Two sets of crossbars (21) slide through the side wall of the socket plate (20), and the two ends of the two sets of crossbars (21) are respectively fixedly connected to the inner sides of the mounting cover (2). The side walls of the two sets of crossbars (21) are all fitted with telescopic springs (22).

4. The automatic feeding screen printing machine for printed circuit boards according to claim 3, characterized in that, The threaded through hole (24) and the fastening bolt (23) are threadedly engaged with each other.

5. The automatic feeding screen printing machine for printed circuit boards according to claim 1, characterized in that, A controller is installed on one side of the mounting cover (2), and the controller is electrically connected to the solenoid valve, the forward and reverse motor (12), the electric telescopic rod (13), the pressure sensor (18), the two sets of belt conveyors (17) and the laser displacement sensor (19) via wires.

6. The automatic feeding screen printing machine for printed circuit boards according to claim 1, characterized in that, A support frame is installed on the lower part of the groove plate (1).

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