Scraper assembly of solder paste printing machine

Abstract

The utility model discloses a solder paste printing machine scraper component, which belongs to the technical field of solder paste printing machines and comprises a paste scraping plate, a steel mesh mounted on the paste scraping plate and a scraper module positioned on the paste scraping plate, a cross beam plate is fixed on the paste scraping plate, two support legs are welded on two opposite side walls of the cross beam plate, and the scraper module is fixed on the cross beam plate. The four supporting legs are all welded to the paste scraping plate, a first servo motor is horizontally installed on one side wall of the cross beam plate, an upper sliding groove penetrating through the top wall and the bottom wall of the cross beam plate is formed in the cross beam plate, a first screw, a sliding rod and a sliding plate are arranged in the upper sliding groove, an output shaft of the first servo motor is coaxially connected with the first screw, and an output shaft of the sliding rod is coaxially connected with the sliding plate. The two ends of the sliding rod are welded to the cross beam plate, one end of the sliding plate sleeves the first screw in a threaded mode, and the other end of the sliding plate sleeves the sliding rod in a sliding mode. According to the solder paste printing machine scraper assembly, it is ensured that after being scraped to be flat, solder paste can just cover an electronic element, and the situation that the solder paste is diffused and leaked around is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of solder paste printers, and in particular relates to a scraper assembly of a solder paste printer. Background Art

[0002] The working principle of the solder paste printer is to fix the circuit board to be printed on the printing positioning table, and then the left and right scrapers of the printer will print the solder paste or red glue through the steel mesh on the corresponding pads. The PCB with uniform printing will be input to the placement machine through the transmission table for automatic placement.

[0003] In the process of realizing the utility model, the inventor found that there are at least the following problems in the technology: an important structure in the solder paste printer is the scraper assembly, which is responsible for evenly applying the solder paste to the surface of the electronic component. However, the current scraper assembly, which usually uses a scraper to scrape the solder paste, is prone to causing the solder paste to spread and leak to both sides of the electronic component, thereby causing the positions on the circuit board that do not need to be coated with solder paste to be contaminated with solder paste.

[0004] Therefore, we propose a solder paste printer scraper assembly to solve the above problems. Utility Model Content

[0005] The main purpose of the utility model is to provide a scraper assembly for a solder paste printer, which ensures that the solder paste can just cover the electronic components after being scraped flat, and will not spread or leak to the surroundings, thereby effectively solving the problems in the background technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A scraper assembly for a solder paste printer, comprising a scraper plate, a steel mesh mounted on the scraper plate, and a scraper module located on the scraper plate, wherein a crossbeam plate is fixed on the scraper plate, wherein two legs are welded to opposite side walls of the crossbeam plate, and a total of four legs are provided and all are welded to the scraper plate, a first servo motor is horizontally installed on one side wall of the crossbeam plate, and an upper slide groove penetrating the top wall and the bottom wall thereof is formed on the crossbeam plate, a first screw rod, a slide rod and a slide plate are provided in the upper slide groove, wherein an output shaft of the first servo motor is coaxially connected to the first screw rod, both ends of the slide rod are welded to the crossbeam plate, one end of the slide plate is threadedly sleeved on the first screw rod, and the other end thereof is slidably sleeved on the slide rod;

[0008] A cylinder is installed on the top wall of the slide, a conveying rod is connected under the cylinder, and a top plate is welded to the bottom of the conveying rod, the scraper module includes a scraper vertically installed on one side of the bottom wall of the top plate, wherein a second servo motor is horizontally installed on one side wall of the top plate, the first servo motor and the second servo motor need to be powered by external power facilities, and a bottom groove is formed at the center of the bottom wall of the top plate, the output shaft of the second servo motor is coaxially connected to the second screw, and inner slide seats are respectively threadedly sleeved on both ends of the second screw, and the threads at both ends of the second screw have opposite rotation directions, the two inner slide seats are both fitted with the top wall of the bottom groove, and limited material plates are fixed and bonded under the two inner slide seats.

[0009] As a preferred embodiment, the first screw rod and the slide rod are both horizontally arranged in the upper slide groove, and both ends of the first screw rod are rotatably connected to the crossbeam plate; so that the first screw rod can operate stably under the drive of the first servo motor.

[0010] As a preferred embodiment, the conveying rod is vertically arranged and connected to the bottom wall of the slide plate, so that the structure of the conveying rod is more stable.

[0011] As a preferred embodiment, the second screw is horizontally arranged in the bottom groove, and both ends of the second screw are rotatably connected to the top plate; so that the second screw can operate stably under the drive of the second servo motor.

[0012] As a preferred embodiment, the bottom walls of the two limiting plates are flush with the bottom wall of the scraper, and the two limiting plates are symmetrical on both sides of the scraper, so that the two limiting plates can cooperate with the scraper to limit the range of the solder paste.

[0013] In summary, the technical effects and advantages of the utility model are as follows:

[0014] The scraper assembly of the solder paste printer drives the second servo motor to operate and drive the second screw to operate according to the different areas of the electronic components on the circuit board during the real-time scraping process of the scraper, so that the two limiting plates are translated in opposite directions or opposite directions, so that the positions of the two limiting plates are just flush with the two side edges of the electronic components, thereby ensuring that the solder paste can just cover the electronic components after being scraped flat, and will not spread to the surroundings or leak. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of a partial structure of the utility model from a bottom-up perspective;

[0017] Figure 3 It is a top view of a partial structure of the utility model.

[0018] In the figure: 1. scraper plate; 2. steel mesh; 3. support foot; 4. crossbeam plate; 5. first servo motor; 6. upper slide groove; 7. first screw rod; 8. slide rod; 9. slide plate; 10. cylinder; 11. transmission rod; 12. top plate; 13. scraper; 14. second servo motor; 15. bottom groove; 16. second screw rod; 17. inner slide seat; 18. material limit plate. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-Figure 3 , a scraper assembly of a solder paste printer, comprising a scraper plate 1, a steel mesh 2 installed on the scraper plate 1 and a scraper module located on the scraper plate 1, a crossbeam plate 4 is fixed on the scraper plate 1, wherein two supporting legs 3 are welded on opposite side walls of the crossbeam plate 4, and a total of four supporting legs 3 are provided and all are welded on the scraper plate 1, a first servo motor 5 is horizontally installed on one side wall of the crossbeam plate 4, and an upper slide groove 6 penetrating the top wall and the bottom wall thereof is formed on the crossbeam plate 4, a first screw rod 7, a slide rod 8 and a slide plate 9 are provided in the upper slide groove 6, wherein the output shaft of the first servo motor 5 is coaxially connected with the first screw rod 7, both ends of the slide rod 8 are welded to the crossbeam plate 4, the first screw rod 7 and the slide rod 8 are horizontally arranged in the upper slide groove 6, and both ends of the first screw rod 7 are rotatably connected to the crossbeam plate 4, so that the first screw rod 7 can stably operate under the drive of the first servo motor 5, one end of the slide plate 9 is threadedly sleeved on the first screw rod 7, and the other end thereof is slidably sleeved on the slide rod 8;

[0021] A cylinder 10 is installed on the top wall of the slide 9, and a transmission rod 11 is connected below the cylinder 10. The transmission rod 11 is vertically arranged and connected to the bottom wall of the slide 9, so that the structure of the transmission rod 11 is more stable, and a top plate 12 is welded to the bottom of the transmission rod 11. The scraper module includes a scraper 13 vertically installed on one side of the bottom wall of the top plate 12, wherein a second servo motor 14 is horizontally installed on one side wall of the top plate 12, the first servo motor 5 and the second servo motor 14 need to be powered by external power facilities, and a bottom groove 15 is formed at the center of the bottom wall of the top plate 12, and the output shaft of the second servo motor 14 is coaxially connected to a second screw 16, and the second screw 16 is horizontally It is arranged in the bottom groove 15, and both ends of the second screw 16 are rotatably connected to the top plate 12, so that the second screw 16 can stably operate under the drive of the second servo motor 14, and inner slide seats 17 are respectively threadedly sleeved on both ends of the second screw 16, and the threads at both ends of the second screw 16 are rotated in opposite directions. The two inner slide seats 17 are both fitted with the top wall of the bottom groove 15, and limiting plates 18 are fixedly bonded under the two inner slide seats 17. The bottom walls of the two limiting plates 18 are flush with the bottom wall of the scraper 13, and the two limiting plates 18 are symmetrical on both sides of the scraper 13, so that the two limiting plates 18 can cooperate with the scraper 13 to limit the range of the solder paste.

[0022] The scraper assembly of the solder paste printer: when it is working, the circuit board to be coated with solder paste is set below the steel mesh 2 and parallel to the steel mesh 2, and the solder paste is released on the steel mesh 2 above the electronic components on the circuit board that need to be coated with solder paste. At this time, the first servo motor 5 is driven to drive the first screw 7 to operate, so that the slide plate 9 is translated along with the slide bar 8 and drives the top plate 12 and the scraper 13 to translate. The height of the scraper 13 can be fine-tuned according to the thickness of the solder paste to be coated. The fine-tuning method is: the air cylinder 10 is driven to drive the transmission rod 11 to extend and retract slightly, thereby adjusting the height of the scraper 13; when the scraper When the scraper 13 encounters solder paste during translation, the limiting plates 18 on both sides thereof will first limit the range where the solder paste is scraped flat, so that when the scraper 13 contacts the solder paste and performs scraping, the solder paste can be just applied to the surface of the electronic component without leaking to both sides; the two limiting plates 18 can also be adjusted according to the size of the surface area of ​​the electronic component, and the adjustment method is: driving the second servo motor 14 to drive the second screw 16 to operate, so that the two inner slide seats 17 translate toward or away from each other, thereby driving the two limiting plates 18 to move to the specified position, so that the solder paste after scraping is limited to the electronic component.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A scraper assembly for a solder paste printer, comprising a scraper plate (1), a steel mesh (2) mounted on the scraper plate (1), and a scraper module located on the scraper plate (1), characterized in that: A crossbeam plate (4) is fixed on the scraper plate (1), wherein two supporting legs (3) are welded on opposite side walls of the crossbeam plate (4), and a total of four supporting legs (3) are provided and are all welded to the scraper plate (1); a first servo motor (5) is horizontally mounted on one side wall of the crossbeam plate (4), and an upper slide groove (6) penetrating the top wall and the bottom wall thereof is formed on the crossbeam plate (4), and a first screw rod (7), a slide rod (8) and a slide plate (9) are provided in the upper slide groove (6), wherein the output shaft of the first servo motor (5) is coaxially connected to the first screw rod (7), and both ends of the slide rod (8) are welded to the crossbeam plate (4), and one end of the slide plate (9) is threadedly sleeved on the first screw rod (7), and the other end thereof is slidably sleeved on the slide rod (8); A cylinder (10) is installed on the top wall of the slide plate (9), a conveying rod (11) is connected below the cylinder (10), and a top plate (12) is welded to the bottom of the conveying rod (11), the scraper module comprises a scraper plate (13) vertically installed on one side of the bottom wall of the top plate (12), a second servo motor (14) is horizontally installed on one side wall of the top plate (12), and a bottom groove (15) is formed at the center of the bottom wall of the top plate (12), the output shaft of the second servo motor (14) is coaxially connected to a second screw rod (16), the two ends of the second screw rod (16) are respectively threadedly sleeved with inner slide seats (17), and the threads at the two ends of the second screw rod (16) are in opposite directions, the two inner slide seats (17) are both in contact with the top wall of the bottom groove (15), and the two inner slide seats (17) are respectively fixed and bonded to the bottom of the limited material plates (18).

2. A solder paste printer scraper assembly according to claim 1, characterized in that: The first screw rod (7) and the sliding rod (8) are both horizontally arranged in the upper sliding groove (6), and both ends of the first screw rod (7) are rotatably connected to the cross beam plate (4).

3. The scraper assembly of a solder paste printer according to claim 1, characterized in that: The transmission rod (11) is vertically arranged and connected to the bottom wall of the slide plate (9).

4. The scraper assembly of a solder paste printer according to claim 1, characterized in that: The second screw rod (16) is horizontally arranged in the bottom groove (15), and both ends of the second screw rod (16) are rotatably connected to the top plate (12).

5. The scraper assembly of a solder paste printer according to claim 1, characterized in that: The bottom walls of the two material limiting plates (18) are flush with the bottom wall of the scraper (13), and the two material limiting plates (18) are symmetrical on both sides of the scraper (13).

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