High-precision solder paste printing machine for PCBA (printed circuit board assembly)

Abstract

The utility model discloses a high-precision solder paste printing machine for a PCBA (printed circuit board assembly) board, which belongs to the field of solder paste printing of the PCBA board and comprises a printing machine body, a printing module is arranged on the printing machine body, a first scraper and a second scraper which are used for scraping solder paste are respectively arranged on the top surface and the bottom surface of the printing module, and a bidirectional threaded rod is rotatably connected onto the printing module; according to the utility model, the bidirectional threaded rod, the threaded sleeve, the first scraper blade, the gear, the rack and the second scraper blade are arranged; the two threaded sleeves in threaded fit with the two-way threaded rod can realize mutual approaching work by utilizing opposite threads on the two sides of the two-way threaded rod, so that solder paste on the two sides of the printing module can be located in the center position for printing of a next PCBA board; the printed center position does not need to be coated with the solder paste manually again to conduct printing of the next PCBA board, waste of the solder paste is avoided, meanwhile, the solder paste located on the two sides does not need to be cleaned manually, and therefore certain labor consumption is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of solder paste printing for PCBA boards, specifically a high-precision solder paste printer for PCBA boards. Background Art

[0002] A PCBA board, namely a printed circuit board, also known as a printed wiring board, is an important electronic component. As a support for electronic components, it is a provider of circuit connections for electronic components. Since it is made using electronic printing technology, it is called a "printed" circuit board. Currently, for the production of PCBA boards, a printer is needed to use solder paste to print the PCBA boards in order to stabilize the electronic components on the PCBA boards and make the PCBA boards meet the production specifications.

[0003] However, in the prior art, after most solder paste printers for PCBA boards print the PCBA boards, their printing components will push some of the solder paste to both sides, resulting in the solder paste on both sides being unable to be in the central position for the next round of PCBA board printing. It is necessary to manually apply the solder paste to the central position of the printing again for the next round of PCBA board printing, wasting a certain amount of solder paste. At the same time, the solder paste on both sides needs to be manually cleaned, which will consume a certain amount of manual labor.

[0004] Therefore, the utility model provides a high-precision solder paste printer for PCBA boards to solve the above problems. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] The utility model provides a high-precision solder paste printer for PCBA boards, aiming to solve the problem in the prior art that most solder paste printers for PCBA boards are difficult to push the solder paste distributed on both sides to the central position for the next round of PCBA board printing, resulting in waste of solder paste. At the same time, the solder paste on both sides needs to be manually cleaned, which will consume a certain amount of manual labor.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the present utility model provides the following technical solutions: A high-precision solder paste printer for a PCBA board, comprising a printer body, a printing module is provided on the printer body, a first squeegee and a second squeegee for scraping the solder paste are respectively provided on the top surface and the bottom surface of the printing module, a bidirectional threaded rod is rotatably connected to the printing module, a motor for driving the bidirectional threaded rod to rotate is fixedly connected to the outer wall of the printing module, a threaded sleeve is threadedly connected to the outer surface of the bidirectional threaded rod, the outer surface of the threaded sleeve is fixedly connected to the outer wall of the first squeegee, a gear is fixedly connected to one end of the bidirectional threaded rod away from the motor, a rack meshing with the gear is fixedly connected to the outer wall of the second squeegee, and a collection box for receiving the solder paste is fixedly connected to the bottom of the second squeegee.

[0009] As a preferred technical solution of the present application, a limiting block is fixedly connected to the outer surface of the threaded sleeve, and a limiting groove for the limiting block to slide is provided inside the printing module.

[0010] As a preferred technical solution of the present application, a first telescopic rod is fixedly connected to the outer wall of the printer body, and a second telescopic rod is fixedly connected to the movable end of the first telescopic rod.

[0011] As a preferred technical solution of the present application, the movable end of the second telescopic rod is fixedly connected to the outer wall of the rack, and a bolt for installing and disassembling the collection box is threadedly connected to the inside of the second squeegee.

[0012] As a preferred technical solution of the present application, a heating pipe for dissolving the solder paste is provided inside the collection box, a spring is fixedly connected to the printer body, and a positioning block is fixedly connected to one end of the spring away from the printer body.

[0013] As a preferred technical solution of the present application, an adjusting rod is fixedly connected to the printer body, one end of the adjusting rod away from the printer body is fixedly connected to the outer wall of the positioning block, and the adjusting rod is inserted into the inner ring of the spring.

[0014] (III) Beneficial effects

[0015] With the setting of the bidirectional threaded rod, threaded sleeve, first scraper, gear, rack and second scraper in the utility model, when the bidirectional threaded rod rotates, the two threaded sleeves in threaded fit with it can approach each other by using the opposite threads on both sides of the bidirectional threaded rod, so that the two threaded sleeves drive the first scraper respectively to push the solder paste on both sides of the top surface of the printing module to the center position of the printing module. At the same time, the bidirectional threaded rod can drive the gear to rotate synchronously, so that the rack meshing with the gear can drive the second scraper to move, so as to achieve the purpose that the second scraper can clean the solder paste adhered to the ground of the printing module. And the cleaned and fallen solder paste can be stored in the collection box. Furthermore, this device enables the solder paste on both sides of the printing module to be in the center position for the printing of the next PCBA board, without manually applying the solder paste to the center position of the printing again for the printing of the next PCBA board, avoiding waste of solder paste. At the same time, the solder paste on both sides does not need to be manually cleaned, thus avoiding a certain amount of manual labor consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a high-precision solder paste printer for PCBA boards;

[0017] Figure 2 is a schematic structural diagram of the first scraper and the second scraper in the high-precision solder paste printer for PCBA boards;

[0018] Figure 3 is a schematic structural diagram of the collection box and bolts in the high-precision solder paste printer for PCBA boards;

[0019] Figure 4 is Figure 1 the enlarged structural diagram at A of

[0020] Figure 5 is Figure 1 the enlarged structural diagram at B of

[0021] In the figure:

[0022] 1, printer body; 2, printing module; 3, first scraper; 4, second scraper; 5, bidirectional threaded rod; 6, motor; 7, threaded sleeve; 8, gear; 9, rack; 10, collection box; 11, limit block; 12, limit groove; 13, first telescopic rod; 14, second telescopic rod; 15, bolt; 16, heating tube; 17, spring; 18, positioning block; 19, adjusting rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] The present utility model provides a high-precision solder paste printer for PCBA boards. As Figure 1-5 shown, the printer includes a printer body 1. A printing module 2 is provided on the printer body 1. A first squeegee 3 and a second squeegee 4 for scraping solder paste are respectively provided on the top and bottom surfaces of the printing module 2. A bidirectional threaded rod 5 is rotatably connected to the printing module 2. An outer wall of the printing module 2 is fixedly connected with a motor 6 for driving the bidirectional threaded rod 5 to rotate. A threaded sleeve 7 is threadedly connected to an outer surface of the bidirectional threaded rod 5. An outer surface of the threaded sleeve 7 is fixedly connected with an outer wall of the first squeegee 3. One end of the bidirectional threaded rod 5 away from the motor 6 is fixedly connected with a gear 8. A rack 9 engaged with the gear 8 is fixedly connected to an outer wall of the second squeegee 4. A collecting box 10 for receiving solder paste is fixedly connected to a bottom of the second squeegee 4.

[0025] When the bidirectional threaded rod 5 rotates by using the opposite threads on both sides, the two threaded sleeves 7 threadedly connected thereto can smoothly move closer to each other. Thus, when the two threaded sleeves 7 drive the first squeegees 3 to move closer to each other respectively, the two first squeegees 3 can push the solder paste on both sides of the printing module 2 to the center position of the printing module 2, facilitating the printing component on the printer body 1 to perform the solder paste printing work on the next round of PCBA boards. While avoiding solder paste waste, and the solder paste on both sides of the printing module 2 does not need to be manually cleaned, thus avoiding manual labor consumption at the same time. Meanwhile, when the bidirectional threaded rod 5 rotates, it can drive the gear 8 to rotate synchronously, so that the rack 9 engaged with the gear 8 can drive the second squeegee 4 to clean the solder paste adhered to the bottom of the printing module 2, so as to achieve a comprehensive cleaning of the solder paste on the printing module 2, minimizing the waste of solder paste as much as possible, and thus minimizing the property loss.

[0026] A limiting block 11 is fixedly connected to an outer surface of the threaded sleeve 7. A limiting groove 12 for the limiting block 11 to slide is formed inside the printing module 2.

[0027] The limiting groove 12 enables the limiting block 11 to have a space for horizontal movement. Thus, when the threaded sleeve 7 moves in the limiting groove 12 by using the limiting block 11, the threaded sleeve 7 can move smoothly, preventing the situation that the threaded sleeve 7 rotates synchronously with the bidirectional threaded rod 5 when the bidirectional threaded rod 5 rotates, thereby restricting the threaded sleeve 7 so that it can drive the first squeegee 3 to move smoothly.

[0028] The outer wall of the printing press body 1 is fixedly connected with a first telescopic rod 13, and the movable end of the first telescopic rod 13 is fixedly connected with a second telescopic rod 14.

[0029] While the second telescopic rod 14 enables the rack 9 to have a support point, and by utilizing the telescopic characteristics provided by the second telescopic rod 14, the rack 9 can move smoothly, preventing the rack 9 from being suspended and unable to form a meshing state with the gear 8. In this way, it is ensured that the rack 9 and the gear 8 can mesh and operate smoothly, so as to ensure the stability when the rack 9 drives the second squeegee 4 to move, enabling the second squeegee 4 to smoothly clean the solder paste adhered to the bottom of the printing module 2.

[0030] The movable end of the second telescopic rod 14 is fixedly connected with the outer wall of the rack 9, and a bolt 15 for installing and disassembling the collection box 10 is threadedly connected inside the second squeegee 4.

[0031] And the first telescopic rod 13 enables the second telescopic rod 14 to have a support and fixing point, preventing the second telescopic rod 14 from still being suspended and causing the rack 9 to fall. Moreover, the bolt 15 enables the collection box 10 to be installed or disassembled at the bottom of the second squeegee 4. Thus, when the solder paste in the collection box 10 is full, the staff can disassemble the collection box 10 to pour out the solder paste. At the same time, the collection box 10 can be installed at the bottom of the second squeegee 4, facilitating the next solder paste collection work, thereby achieving flexible reception of the solder paste or pouring out and using the solder paste.

[0032] A heating tube 16 for dissolving the solder paste is arranged inside the collection box 10. A spring 17 is fixedly connected to the printing press body 1. One end of the spring 17 far from the printing press body 1 is fixedly connected with a positioning block 18. An adjusting rod 19 is fixedly connected to the printing press body 1. One end of the adjusting rod 19 far from the printing press body 1 is fixedly connected with the outer wall of the positioning block 18, and the adjusting rod 19 is inserted into the inner circle of the spring 17.

[0033] When the solder paste in the collection box 10 hardens after long-term storage, the heat provided by the heating tube 16 can dissolve the solder paste, making it easy to pour out and use, preventing the hardened solder paste from remaining in the collection box 10 and causing waste. Moreover, the spring 17 enables the positioning block 18 to have an elastic adjustment force, so that the positioning block 18 can adapt to PCBA boards of various sizes for corresponding clamping and positioning, enabling PCBA boards of different sizes to be equally positioned. Thus, when the two positioning blocks 18 position the PCBA board, the stability of the PCBA board during printing can be ensured, preventing the PCBA board from shifting during printing and affecting the printing accuracy. Additionally, the adjusting rod 19, through its cooperation with the spring 17, enables the positioning block 18 to have good stability during the clamping process, preventing the positioning block 18 from tilting and shifting when clamping the PCBA board relying solely on the spring 17.

[0034] Working principle:

[0035] After the printing machine body 1 prints the PCBA board, the printing components in the printing machine body 1 will push the solder paste on the printing module 2 to both sides. At this time, the motor 6 can be started, so that the output shaft of the motor 6 drives the bidirectional threaded rod 5 to rotate. When the bidirectional threaded rod 5 rotates, the two threaded sleeves 7 that are threadedly engaged with it on both sides with opposite threads can respectively drive the first scrapers 3 to approach each other, so that the two first scrapers 3 can push the solder paste on both sides of the printing module 2 to the center position of the printing module 2.

[0036] At the same time, when the bidirectional threaded rod 5 rotates, it can drive the gear 8 to rotate synchronously, so that the rack 9 engaged with the gear 8 can drive the second scraper 4 to move, so that the second scraper 4 can clean the solder paste adhered to the bottom of the printing module 2, and the cleaned solder paste can fall into the collection box 10. Subsequently, the staff can detach the collection box 10 from the bottom of the second scraper 4 by using the bolt 15, so that the staff can pour the solder paste collected in the collection box 10 into the center position of the printing module 2.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. High-precision solder paste printer for PCBA board, including a printer body (1), characterized in that: A printing module (2) is provided on the printing press body (1). A first squeegee (3) and a second squeegee (4) for scraping solder paste are respectively provided on the top and bottom surfaces of the printing module (2). A bidirectional threaded rod (5) is rotatably connected to the printing module (2). A motor (6) for driving the bidirectional threaded rod (5) to rotate is fixedly connected to the outer wall of the printing module (2). A threaded sleeve (7) is threadedly connected to the outer surface of the bidirectional threaded rod (5). The outer surface of the threaded sleeve (7) is fixedly connected to the outer wall of the first squeegee (3). A gear (8) is fixedly connected to one end of the bidirectional threaded rod (5) away from the motor (6). A rack (9) meshing with the gear (8) is fixedly connected to the outer wall of the second squeegee (4). A collection box (10) for receiving solder paste is fixedly connected to the bottom of the second squeegee (4).

2. The high-precision solder paste printer for PCBA boards according to claim 1, wherein: A limiting block (11) is fixedly connected to the outer surface of the threaded sleeve (7). A limiting groove (12) for the limiting block (11) to slide is formed inside the printing module (2).

3. The high-precision solder paste printer for PCBA boards according to claim 1, wherein: A first telescopic rod (13) is fixedly connected to the outer wall of the printing press body (1). A second telescopic rod (14) is fixedly connected to the movable end of the first telescopic rod (13).

4. The high-precision solder paste printer for PCBA boards according to claim 3, wherein: The movable end of the second telescopic rod (14) is fixedly connected to the outer wall of the rack (9). A bolt (15) for installing and disassembling the collection box (10) is threadedly connected to the inside of the second squeegee (4).

5. The high-precision solder paste printer for PCBA boards according to claim 1, wherein: A heating pipe (16) for dissolving solder paste is provided inside the collection box (10). A spring (17) is fixedly connected to the printing press body (1). A positioning block (18) is fixedly connected to one end of the spring (17) away from the printing press body (1).

6. The high-precision solder paste printer for PCBA boards according to claim 5, wherein: An adjusting rod (19) is fixedly connected to the printing press body (1). One end of the adjusting rod (19) away from the printing press body (1) is fixedly connected to the outer wall of the positioning block (18). The adjusting rod (19) is inserted into the inner ring of the spring (17).

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