Circuit screen printing device of printed circuit board

Abstract

The utility model discloses a circuit screen printing device of a printed circuit board, which comprises a mounting seat and a vertical plate, the vertical plate is fixedly mounted on the top surface of the mounting seat, a lifting frame is sleeved on the outer surface of the vertical plate, and a slot is arranged on the bottom surface of the lifting frame. The printing ink box has the advantages that the flow dividing pipe and the fan-shaped nozzle are adopted, the flow dividing pipe is fixed below the top frame, the fan-shaped nozzle is located in front of the scraping plate, when circuit board printing is carried out, the pump body can be started to pump out printing ink in the printing ink box, the printing ink enters the main shaft pipe through the hose and the bent pipe, and the printing ink enters the flow dividing pipe and is sprayed out along the fan-shaped nozzle; the second driving motor is started to drive the lead screw to rotate, then the movable frame is driven to move, then the scraping plate is driven to move, sprayed ink is evenly coated and scraped, the fan-shaped nozzles are linearly arranged, the sprayed ink is wide in coverage and even, the phenomenon of excessive accumulation is avoided, ink waste is avoided, and meanwhile the silk-screen uniformity and the silk-screen efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board printing, in particular to a circuit screen printing device for a printed circuit board. Background Art

[0002] Circuit board is one of the important parts of the electronics industry. It is the support of electronic components and the carrier of electrical connection. In the production process of printed circuit board, the circuit pattern is first made on the copper surface of the single-sided substrate by silk screen printing. The silk screen value is the silk screen layer. When drawing PCB, it is layered. The layer containing text is used to mark components or add other information. This layer is called silk screen layer. The component shape, serial number and other explanatory text are printed on the component surface or solder surface by silk screen printing to facilitate the plug-in of the circuit board production process and the maintenance operation of the product in the future.

[0003] After searching, it was found that the publication number is CN218430451U, and the name is a circuit screen printing device for a printed circuit board. The application proposes that in the prior art, when the circuit board screen printing device scrapes the ink through a scraper, it is necessary to continuously add ink according to the ink consumption to avoid the problem of insufficient ink when screen printing on the circuit board. However, when the screen printing device in the prior art adds ink, the overall addition of ink is uneven, which leads to uneven screen printing on the circuit board, resulting in poor screen printing effect on the circuit board. The scraper is driven by the first tooth plate and the second tooth plate to perform alternating lifting and scraping. During the screen printing scraping process of one group of scrapers, the ink box and multiple groups of ink injection tubes replenish ink on the top of the screen according to the consumption. Then, when the scraper is scraped, since the multiple groups of dispersion plates are inclined, Then, as the scraper moves during the screen printing process, the dispersion plate can evenly disperse the newly added ink, making the ink more evenly dispersed on the screen surface, thereby effectively improving the screen printing effect of the circuit board. However, in actual use, although the ink in the application is added in a diverted manner, the ink outflow is also in a concentrated state. The addition of ink is distributed in multiple strips, and the ink distribution is still not uniform enough, which affects the uniformity of the screen printing and easily causes excessive waste of ink. Further improvements can be made. At the same time, the application adopts two sets of scraper systems, which are alternately raised and lowered for forward and reverse scraping operations. The two sets of scraper systems are relatively expensive and have a relatively complex structure. At the same time, the two sets of scraper systems need to be processed at the same time during later cleaning and maintenance, and the later maintenance and use costs are also high. Further improvements can be made.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a circuit screen printing device for a printed circuit board, which has the advantages of simple structure and improved work efficiency, thereby solving the problems in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] In order to achieve the advantages of simple structure and improved work efficiency, the specific technical solutions adopted by the utility model are as follows:

[0009] The top surface of the vertical plate is provided with a first sliding groove, and the interior of the sliding groove is penetrated by a moving frame which is slidably connected, and one end of the moving frame is penetrated by a main shaft tube which is rotatably connected, and a top frame is arranged below the moving frame above the mounting seat, and a scraper is vertically fixedly installed on the bottom surface of one side of the top frame, and a shunt pipe is fixedly installed on the bottom surface of the top frame in front of the scraper, the main shaft pipe penetrates the top frame and is fixedly connected to the top frame, and the main shaft pipe is connected with the shunt pipe through-connection, and a fan-shaped nozzle is installed on the surface of the shunt pipe, and a first driving motor is fixedly installed on one side of the main shaft pipe on the bottom surface of one end of the moving frame, and the first driving motor A driving gear is installed at the output end of the moving motor, and a driven gear is fixedly sleeved on the outer surface of the top of the main shaft tube, and the driven gear is meshed with the driving gear. A lifting plate is fixedly installed on the other side surface of the lifting frame, and end plates are fixedly connected at both ends of the lifting plate, and a second driving motor is fixedly installed on the surface of one side of the end plate, a screw rod is installed at the output end of the second driving motor, and the other end of the screw rod is rotatably connected to another end plate, and the screw rod passes through the other end of the moving frame and is threadedly connected to the other end of the moving frame, an electric cylinder is vertically installed between the lifting plate and the mounting seat, an ink tank is fixedly installed on the top surface of the mounting seat on the other side of the electric cylinder, and a pump body is fixedly installed on the top surface of the ink tank, and a hose is through-connected at the output end of the pump body, and a bent pipe is rotatably connected to the top surface of the main shaft tube through a rotating connector, and the other end of the bent pipe is through-connected to the other end of the hose.

[0010] Furthermore, a bracket is fixedly installed on the top surface of the movable frame, and the top of the bracket is fixedly connected to the other end of the bent pipe.

[0011] Furthermore, a plurality of fan-shaped nozzles are arranged at equal intervals, and the intervals between the fan-shaped nozzles are smaller than the spray width of the fan-shaped nozzles.

[0012] Furthermore, the input end of the pump body is connected to the inside of the ink box through a suction tube.

[0013] Furthermore, the screw rod is rotatably connected to the end plate via a bearing.

[0014] Furthermore, the height of the slide groove is equal to the thickness of the movable frame, and the inner wall of the slide groove is polished.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a circuit screen printing device for a printed circuit board, which has the following beneficial effects:

[0017] (1) The utility model adopts a shunt pipe and a fan-shaped nozzle. The shunt pipe is fixed under the top frame, and the fan-shaped nozzle is in front of the scraper. When printing a circuit board, the pump body can be started to draw out the ink in the ink box through the hose and the bend pipe into the main shaft tube. The ink enters the shunt pipe and is sprayed along the fan-shaped nozzle. At the same time, the second drive motor is started to drive the screw to rotate, and then drive the moving frame to move, and then drive the scraper to move, and evenly apply the sprayed ink. The fan-shaped nozzles are arranged in a straight line, and the sprayed ink covers a wide and uniform area, and there is no excessive accumulation. The waste of ink is avoided and the uniformity and efficiency of silk screen printing are improved.

[0018] (2) The utility model adopts a reversible scraper. When it is necessary to scrape ink in the opposite direction, the staff can start the electric cylinder to extend, push the lifting frame and the scraper upward, and at the same time, start the first drive motor to drive the drive gear to rotate 180°, and then drive the driven gear to rotate 180° to achieve the reversal of the scraper. Then shorten the electric cylinder and start the second drive motor to rotate in the opposite direction to perform reverse silk screen scraping. The device performs forward and reverse silk screen scraping by flipping the scraper. The operation can be completed with one set of scrapers. The structure is simpler and more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the external structure of a circuit screen printing device for a printed circuit board proposed by the utility model;

[0021] Figure 2 This is an enlarged view of node A of a circuit screen printing device for a printed circuit board proposed by the utility model;

[0022] Figure 3 This is an enlarged view of the B node of a circuit screen printing device for a printed circuit board proposed by the utility model;

[0023] Figure 4The utility model is a schematic diagram of the internal structure of a circuit screen printing device for a printed circuit board.

[0024] In the figure:

[0025] 1. Mounting seat; 2. Vertical plate; 3. Slot; 4. Lifting frame; 5. Slide; 6. Moving frame; 7. Top frame; 8. Spindle tube; 9. First drive motor; 10. Driven gear; 11. Rotary connector; 12. Bend pipe; 13. Drive gear; 14. Bracket; 15. Diverter pipe; 16. Fan-shaped nozzle; 17. Scraper; 18. Hose; 19. End plate; 20. Pump body; 21. Screw rod; 22. Pick plate; 23. Electric cylinder; 24. Ink box; 25. Second drive motor. DETAILED DESCRIPTION

[0026] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They 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, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] According to an embodiment of the utility model, a circuit screen printing device for a printed circuit board is provided.

[0028] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-4As shown, a circuit screen printing device for a printed circuit board according to an embodiment of the utility model comprises a mounting seat 1 and a vertical plate 2, the vertical plate 2 is fixedly mounted on the top surface of the mounting seat 1, and a lifting frame 4 is sleeved on the outer surface of the vertical plate 2, and a slot 3 is provided on the bottom surface of the lifting frame 4, the vertical plate 2 is inserted into the slot 3 and is slidably connected with the slot 3, the vertical plate 2 is guided for the lifting of the lifting frame 4, a slide groove 5 is provided on the top surface of the vertical plate 2, and a moving frame 6 is slidably connected through the inside of the slide groove 5, and a spindle tube 8 is rotatably connected through one end of the moving frame 6, the spindle tube 8 is rotatably connected to the moving frame 6 through a limit bearing to avoid axial movement, a top frame 7 is arranged below the moving frame 6 and above the mounting seat 1, and a scraper 17 is vertically fixedly mounted on the bottom surface of one side of the top frame 7, and the bottom of the top frame 7 A shunt pipe 15 is fixedly installed on the surface in front of the scraper 17, the main shaft pipe 8 passes through the top frame 7 and is fixedly connected to the top frame 7, and the main shaft pipe 8 is connected to the shunt pipe 15, and a fan-shaped nozzle 16 is installed on the surface of the shunt pipe 15, one side of the main shaft pipe 8 is located at the bottom surface of one end of the moving frame 6, and a driving gear 13 is installed on the output end of the first driving motor 9, and a driven gear 10 is fixedly sleeved on the outer surface of the top of the main shaft pipe 8, and the driven gear 10 is meshed with the driving gear 13, a lifting plate 22 is fixedly installed on the surface of the other side of the lifting frame 4, and the two ends of the lifting plate 22 are fixedly connected to the end plate 19, and a second driving motor 25 is fixedly installed on the surface of one side of the end plate 19, and a screw rod 21 is installed on the output end of the second driving motor 25, and the screw rod 21 is also One end is rotatably connected to the other end plate 19, and the screw rod 21 passes through the other end of the mobile frame 6 and is threadedly connected to the other end of the mobile frame 6. It is a common driving structure. An electric cylinder 23 is vertically installed between the pick plate 22 and the mounting seat 1. The other side of the electric cylinder 23 is located on the top surface of the mounting seat 1 and an ink tank 24 is fixedly installed, and a pump body 20 is fixedly installed on the top surface of the ink tank 24. The pump body 20 is a special pump for ink pumping. It is a common equipment and will not be described in detail here. In addition, a hose 18 is connected through the output end of the pump body 20. The top surface of the spindle tube 8 is rotatably connected to a bent pipe 12 through a rotary connector 11, and the other end of the bent pipe 12 is connected through the other end of the hose 18. The rotary connector 11 plays a role of rotational connection, which is convenient for the top frame 7 and the scraper 17 to flip and divert. The tube 15 is fixed below the top frame 7, and the fan-shaped nozzle 16 is in front of the scraper 17. When printing the circuit board, the pump body 20 can be started to extract the ink in the ink box 24 through the hose 18 and the elbow 12 into the main shaft tube 8, and the ink enters the shunt tube 15 and is sprayed along the fan-shaped nozzle 16. At the same time, the second drive motor 25 is started to drive the screw rod 21 to rotate, thereby driving the moving frame 6 to move, and then driving the scraper 17 to move, and evenly apply the sprayed ink. The fan-shaped nozzles 16 are arranged in a straight line, and the sprayed ink covers a wide and uniform area, and there will be no excessive accumulation, which avoids the waste of ink and improves the uniformity and efficiency of silk screen printing. At the same time, when it is necessary to scrape the ink in the opposite direction, the staff can start the electric cylinder 23 to extend.Push the lifting frame 4 and the scraper 17 upward, and at the same time, start the first drive motor 9 to drive the drive gear 13 to rotate 180°, and then drive the driven gear 10 to rotate 180° to achieve the flipping of the scraper 17. Then shorten the electric cylinder 23 and start the second drive motor 25 to rotate in the opposite direction to perform reverse screen printing and scraping. This device performs forward and reverse screen printing and scraping by flipping the scraper 17. The operation can be completed with one set of scrapers 17, and the structure is simpler and more convenient to use.

[0029] In one embodiment, a bracket 14 is fixedly mounted on the top surface of the movable frame 6 , and the top of the bracket 14 is fixedly connected to the other end of the bent pipe 12 to prevent the bent pipe 12 from rotating as the spindle tube 8 rotates.

[0030] In one embodiment, a plurality of fan-shaped nozzles 16 are arranged at equal intervals, and the intervals between the fan-shaped nozzles 16 are smaller than the spraying width of the fan-shaped nozzles 16 , so as to improve the comprehensiveness and uniformity of inkjet coverage.

[0031] In one embodiment, the input end of the pump body 20 is connected to the inside of the ink box 24 through a suction tube for pumping out ink.

[0032] In one embodiment, the screw rod 21 is rotatably connected to the end plate 19 via a bearing, thereby improving the rotation stability of the screw rod 21 .

[0033] In one embodiment, the height of the slide groove 5 is equal to the thickness of the moving frame 6 , and the inner wall of the slide groove 5 is polished, and the slide groove 5 serves as a movement guide for the moving frame 6 .

[0034] Working principle:

[0035] When printing a circuit board, the pump body 20 can be started to draw out the ink in the ink box 24 through the hose 18 and the elbow 12 into the main shaft tube 8, and the ink enters the shunt tube 15 and is sprayed along the fan-shaped nozzle 16. At the same time, the second drive motor 25 is started to drive the screw rod 21 to rotate, thereby driving the moving frame 6 to move, and then driving the scraper 17 to move, and evenly scrape the sprayed ink. The fan-shaped nozzles 16 are arranged in a straight line, and the sprayed ink covers a wide and uniform area, and there will be no excessive accumulation, which avoids ink waste and improves the uniformity and screen printing of the screen. Printing efficiency. At the same time, when it is necessary to scrape ink in the opposite direction, the staff can start the electric cylinder 23 to extend, push the lifting frame 4 and the scraper 17 to move up, and at the same time, start the first drive motor 9 to drive the drive gear 13 to rotate 180°, and then drive the driven gear 10 to rotate 180°, so as to realize the flipping of the scraper 17. Then shorten the electric cylinder 23 and start the second drive motor 25 to rotate in the opposite direction to perform reverse silk screen scraping. The device performs forward and reverse silk screen scraping by flipping the scraper 17. The operation can be completed with one set of scrapers 17. The structure is simpler and more convenient to use.

[0036] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A circuit screen printing device for a printed circuit board, characterized in that: The utility model comprises a mounting seat (1) and a vertical plate (2), wherein the vertical plate (2) is fixedly mounted on the top surface of the mounting seat (1), and a lifting frame (4) is sleeved on the outer surface of the vertical plate (2), and a slot (3) is provided on the bottom surface of the lifting frame (4), wherein the vertical plate (2) is inserted into the slot (3) and is slidably connected with the slot (3), and a sliding groove (5) is provided on the top surface of the vertical plate (2), and a moving frame (6) is slidably connected through the inside of the sliding groove (5), and a main shaft tube (8) is rotatably connected through one end of the moving frame (6), and a lower portion of the moving frame (6) is provided above the mounting seat (1). A top frame (7) is provided, and a scraper (17) is vertically fixedly installed on the bottom surface of one side of the top frame (7), and a shunt pipe (15) is fixedly installed on the bottom surface of the top frame (7) in front of the scraper (17), the main shaft pipe (8) passes through the top frame (7) and is fixedly connected to the top frame (7), and the main shaft pipe (8) is connected to the shunt pipe (15), and a fan-shaped nozzle (16) is installed on the surface of the shunt pipe (15), and a first drive motor (9) is fixedly installed on the bottom surface of one end of the moving frame (6) on one side of the main shaft pipe (8), and a drive gear is installed on the output end of the first drive motor (9) (13), a driven gear (10) is fixedly sleeved on the outer surface of the top of the spindle tube (8), and the driven gear (10) is meshed with the driving gear (13), a lifting plate (22) is fixedly installed on the other side surface of the lifting frame (4), and the two ends of the lifting plate (22) are fixedly connected to the end plate (19), and a second driving motor (25) is fixedly installed on one side surface of the end plate (19), and a screw rod (21) is installed on the output end of the second driving motor (25), and the other end of the screw rod (21) is rotatably connected to another end plate (19), and the screw rod (21) penetrates and moves The other end of the frame (6) is threadedly connected to the other end of the movable frame (6), an electric cylinder (23) is vertically installed between the lifting plate (22) and the mounting seat (1), the other side of the electric cylinder (23) is located on the top surface of the mounting seat (1) and an ink box (24) is fixedly installed, and the top surface of the ink box (24) is fixedly installed with a pump body (20), and the output end of the pump body (20) is connected with a hose (18), and the top surface of the main shaft tube (8) is connected with a bent pipe (12) through a rotary connector (11), and the other end of the bent pipe (12) is connected with the other end of the hose (18).

2. A circuit screen printing device for a printed circuit board according to claim 1, characterized in that: A bracket (14) is fixedly mounted on the top surface of the movable frame (6), and the top of the bracket (14) is fixedly connected to the other end of the curved pipe (12).

3. A circuit screen printing device for a printed circuit board according to claim 1, characterized in that: A plurality of fan-shaped nozzles (16) are arranged at equal intervals, and the intervals between the fan-shaped nozzles (16) are smaller than the spray width of the fan-shaped nozzles (16).

4. A circuit screen printing device for a printed circuit board according to claim 1, characterized in that: The input end of the pump body (20) is connected to the inside of the ink box (24) through a suction tube.

5. The circuit screen printing device for a printed circuit board according to claim 1, characterized in that: The screw rod (21) is rotatably connected to the end plate (19) via a bearing.

6. A circuit screen printing device for a printed circuit board according to claim 1, characterized in that: The height of the slide groove (5) is equal to the thickness of the movable frame (6), and the inner wall of the slide groove (5) is polished.

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