Tin spraying mechanism for tinning PCB golden finger

Abstract

The utility model relates to a tin spraying mechanism for tinning PCB golden fingers, which belongs to the technical field of tinning of PCB golden fingers and comprises a conveying belt body, a mounting frame with the left side and the right side open is fixed on the outer side of the top of the conveying belt body, and a hot air tin spraying assembly is mounted on the inner side of the mounting frame. A plurality of PCB engineering jointed boards are placed on the top of the conveying belt body. The hot air tin spraying assembly comprises a proximity sensor fixedly mounted on the rear side wall in the mounting frame, an electric push rod penetrating through and fixedly mounted at the top of the mounting frame, a hot air leveling tin spraying mechanism fixedly mounted at the top of the mounting frame, and a conveying pipe fixed to the output end of the hot air leveling tin spraying mechanism. The metal corrugated pipe is fixed to the bottom end of the conveying pipe, and the moving box is fixedly installed on an output shaft of the electric push rod. The tin spraying mechanism for tinning of the PCB golden finger can adapt to tinning and drying work of PCB golden finger plates with different thicknesses.

Description

Technical Field

[0001] The utility model relates to the technical field of tin plating on PCB gold fingers, and specifically relates to a tin spraying mechanism for tin plating on PCB gold fingers. Background Technique

[0002] A PCB is a printed circuit board, also known as a printed wiring board. It is an important electronic component, a support for electronic components, and a carrier for electrical connection of electronic components. The PCB gold finger is a gold-plated or copper-plated sheet seen at the connection edge of the PCB. The purpose of the gold finger is to assist in connecting the PCB to the motherboard of the computer.

[0003] Since the PCB gold finger is designed as an isolated convex shape, the conventional red tape can only cover the surface of the gold finger. During the actual operation, the side of the gold finger is prone to folding, resulting in tin leakage. Moreover, when the copper thickness of the gold finger is thicker, the covering effect of the red tape on the side is worse, and the risk of tin leakage is greater. When the gold finger with a copper thickness greater than 105um is soaked in a tin bath at high temperature and then subjected to hot air leveling, due to the non-concentrated wind force of the hot air and the inability to make adaptive adjustments according to different thicknesses, the air knife of the hot air is likely to blow open the tape on the side, resulting in an irreparable risk and scrapping of the PCB gold finger. For this reason, this application provides a tin spraying mechanism for tin plating on PCB gold fingers to solve the above problems. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a tin spraying mechanism for tin plating on PCB gold fingers, which has the advantages of being able to adapt to the tin plating and drying work of PCB gold finger plates with different thicknesses, and solves the problem that the side tape is easily blown open when the existing PCB gold fingers are soaked in a tin bath at high temperature and then subjected to hot air leveling due to non-concentrated wind force and poor adaptability to plates with different thicknesses.

[0006] (2) Technical Solutions

[0007] To achieve the purpose of being able to adapt to the tin plating and drying work of PCB gold finger plates with different thicknesses, the utility model provides the following technical solution: A tin spraying mechanism for tin plating on PCB gold fingers, including a conveyor belt main body, an installation frame with openings on both the left and right sides is fixed on the outer side of the top of the conveyor belt main body, a hot air tin spraying component is installed inside the installation frame, and several PCB engineering panels are placed on the top of the conveyor belt main body;

[0008] The hot air solder spraying assembly includes a proximity sensor fixedly installed on the rear side wall inside the installation frame, an electric push rod passing through and fixedly installed on the top of the installation frame, a hot air leveling and solder spraying mechanism fixedly installed on the top of the installation frame, a delivery pipe fixed to the output end of the hot air leveling and solder spraying mechanism, a metal bellows fixed to the bottom end of the delivery pipe, a moving box fixed to the output shaft of the electric push rod, a moving component installed inside the moving box, an air outlet nozzle fixed to the bottom of the moving component, and a laser sensor fixed to the front of the air outlet nozzle.

[0009] Further, the moving component includes a lead screw rotatably connected to the inside of the moving box through a bearing, a moving block threadedly connected to the outside of the lead screw, a driving mechanism fixedly installed on the front of the moving box, two slide rails respectively fixedly installed on the left and right sides of the moving box, a connecting block fixed to the bottom of the moving block, a fixing plate fixed to the bottom of the connecting block, and two sliding plates fixed to the top of the fixing plate.

[0010] Further, a sliding hole for the connecting block to slide through is formed at the bottom of the moving box, and the output shaft of the driving mechanism penetrates through the front of the moving box and is fixedly connected to the front end of the lead screw.

[0011] Further, sliding grooves for the same-side slide rails to be inserted and slide through are formed on the opposite sides of the two sliding plates, and the front and back of the sliding grooves are both open.

[0012] Further, the air outlet nozzle is fixed to the bottom of the fixing plate, the bottom of the air outlet nozzle is open, and the bottom opening is rectangular.

[0013] Further, the position of the proximity sensor corresponds to that of the PCB engineering panel, and the proximity sensor, the air outlet nozzle, and the laser sensor are all located in the same longitudinal horizontal plane.

[0014] Further, the bottom end of the delivery pipe penetrates through the top of the installation frame, and the end of the metal bellows away from the delivery pipe penetrates through the outside of the air outlet nozzle and is communicated with its inside.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present utility model provides a solder spraying mechanism for tinning the PCB gold fingers, having the following beneficial effects:

[0017] The spray tin mechanism for tinning the PCB gold fingers can adapt to the tinning and drying work of PCB gold finger plates with different thicknesses through the cooperation of the mounting frame on the top of the conveyor belt main body, the hot air spray tin assembly and the PCB engineering panel. Moreover, it can further improve the tinning method of the PCB gold fingers so that they can cooperate with this spray tin mechanism, thereby further enhancing the quality and stability of the tinning process of the PCB gold fingers, and effectively improving the practicality of the spray tin mechanism for tinning the PCB gold fingers. Brief Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the present utility model;

[0019] Figure 2 It is a partial enlarged schematic diagram of part A in the structure of the present utility model;

[0020] Figure 3 It is the structure of the present utility model Figure 1 The left view schematic diagram of the moving box connection structure in the middle;

[0021] Figure 4 It is a three-dimensional schematic diagram of the PCB engineering panel in the structure of the present utility model;

[0022] Figure 5 It is a three-dimensional schematic diagram of the air outlet nozzle in the structure of the present utility model.

[0023] In the figure: 1 conveyor belt main body, 2 mounting frame, 300 hot air spray tin assembly, 301 proximity sensor, 302 electric push rod, 303 hot air leveling spray tin mechanism, 304 delivery pipe, 305 metal bellows, 306 moving box, 307 lead screw, 308 moving block, 309 drive mechanism, 310 slide rail, 311 connecting block, 312 fixing plate, 313 sliding plate, 314 air outlet nozzle, 315 laser sensor, 4 PCB engineering panel. Detailed Description of the Preferred Embodiments

[0024] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1 to 5, the present utility model provides a technical solution: a spraying tin mechanism for PCB gold fingers, including a conveyor belt main body 1. On the outer side of the top of the conveyor belt main body 1, an installation frame 2 with openings on both left and right sides is fixedly installed. Inside the installation frame 2, a hot air spraying tin assembly 300 is installed. On the top of the conveyor belt main body 1, a number of PCB engineering panel boards 4 are placed. Through the coordinated use of the installation frame 2, the hot air spraying tin assembly 300, and the PCB engineering panel boards 4 on the top of the conveyor belt main body 1, it can adapt to the tin spraying and drying work of PCB gold finger plates with different thicknesses, and can also improve the tin spraying method of the PCB gold fingers, enabling it to cooperate with this spraying tin mechanism for use, thereby further improving the quality and stability of the tin spraying processing of the PCB gold fingers, and effectively enhancing the practicality of the spraying tin mechanism for PCB gold fingers.

[0026] In this embodiment, the hot air spraying tin assembly 300 is a structure for tin spraying processing of PCB gold fingers.

[0027] As Figure 1 , Figure 2 and Figure 5 shown, the hot air spraying tin assembly 300 includes a proximity sensor 301 fixedly installed on the rear side wall inside the installation frame 2, an electric push rod 302 passing through and fixedly installed on the top of the installation frame 2, a hot air leveling and spraying tin mechanism 303 fixedly installed on the top of the installation frame 2, a delivery pipe 304 fixed to the output end of the hot air leveling and spraying tin mechanism 303, a metal bellows 305 fixed to the bottom end of the delivery pipe 304, a moving box 306 fixed to the output shaft of the electric push rod 302, a moving component installed inside the moving box 306, an air outlet nozzle 314 fixed to the bottom of the moving component, and a laser sensor 315 fixed to the front of the air outlet nozzle 314.

[0028] It should be noted that the proximity sensor 301 corresponds to the position of the PCB engineering panel board 4. The proximity sensor 301, the air outlet nozzle 314, and the laser sensor 315 are all located in the same longitudinal horizontal plane, enabling the proximity sensor 301 to sense the position of the PCB engineering panel board 4, and further enabling the laser sensor 315 to monitor the distance between the PCB engineering panel board 4 and the air outlet nozzle 314, realizing different adaptive adjustment functions for PCB engineering panel boards 4 with different thicknesses.

[0029] In addition, the hot air leveling and spraying tin mechanism 303 is a device that can blow tin and hot air onto the surface of the PCB engineering panel board 4 at the same time. It conveys hot air and tin through two different inlet pipes respectively and then mixes and sprays them together. It is a publicly available device, so it will not be elaborated too much. The bottom end of the delivery pipe 304 penetrates through the top of the installation frame 2, enabling the delivery pipe 304 to normally convey tin and hot air.

[0030] Meanwhile, one end of the metal bellows 305 far from the conveying pipe 304 penetrates through the outside of the air outlet nozzle 314 and is connected to its interior, enabling the tin and hot air inside the metal bellows 305 to enter the interior of the air outlet nozzle 314. Among them, the part of the end of the metal bellows 305 located inside the air outlet nozzle 314 needs to be arranged towards the side of the bottom opening of the air outlet nozzle 314 to reduce the obstruction during the flow of tin and hot air, enabling them to be ejected more efficiently.

[0031] In this embodiment, the moving component is a structure for performing mobile tin spraying.

[0032] As Figure 2 and Figure 3 shown, the moving component includes a lead screw 307 rotatably connected to the inside of the moving box 306 through a bearing, a moving block 308 threadedly connected to the outside of the lead screw 307, a driving mechanism 309 fixedly installed on the front of the moving box 306, two slide rails 310 respectively fixedly installed on the left and right sides of the moving box 306, a connecting block 311 fixed to the bottom of the moving block 308, a fixing plate 312 fixed to the bottom of the connecting block 311, and two sliding plates 313 fixed to the top of the fixing plate 312.

[0033] It should be noted that a sliding hole for the connecting block 311 to slide is opened at the bottom of the moving box 306, enabling the connecting block 311 to move normally inside the sliding hole. The output shaft of the driving mechanism 309 penetrates through the front of the moving box 306 and is fixedly connected to one end of the front of the lead screw 307, enabling the driving mechanism 309 to drive the lead screw 307 to rotate. The driving mechanism 309 can be a servo motor.

[0034] In addition, sliding grooves for the insertion and sliding of the same-side slide rails 310 are opened on the opposite sides of the two sliding plates 313. The front and back of the sliding grooves are both open, enabling the sliding plates 313 to slide on the outside of the corresponding slide rails 310. The air outlet nozzle 314 is fixed to the bottom of the fixing plate 312. The bottom of the air outlet nozzle 314 is open, and the bottom opening is rectangular, enabling the air outlet nozzle 314 to be driven by the moving block 308 to move synchronously.

[0035] It should also be noted that, as Figure 4 shown, the long side direction of the gold fingers of the PCB engineering panel 4 is consistent with the moving direction during tin spraying. And when performing the tinning work, blue glue needs to be printed on the PCB engineering panel 4 to fill the concave areas on the sides of the gold fingers. After pasting red adhesive paper, processes such as hot pressing, baking, and hot pressing are carried out in sequence, and finally, hot air tin spraying and tinning work are performed.

[0036] The working principle of the above embodiment is as follows:

[0037] When tinning the PCB engineering panel 4, apply blue glue on the PCB engineering panel 4 so that it can fill the concave area on the side of the gold finger. Then paste red adhesive paper and perform the processes of hot pressing, baking the board, and hot pressing again. Place it on the top of the conveyor belt main body 1 for transportation. The proximity sensor 301 can sense the approaching PCB engineering panel 4, and then control the electric push rod 302 to drive the moving box 306 to move vertically. The laser sensor 315 can monitor the distance between the PCB engineering panel 4 and the air outlet nozzle 314, so that the air outlet nozzle 314 can meet the tinning work of gold fingers with different thicknesses. Start the hot air leveling and tin spraying mechanism 303, so that hot air and liquid tin can be transported through the delivery pipe 304, and then transported through the metal bellows 305 to the inside of the air outlet nozzle 314 and sprayed on the surface of the PCB engineering panel 4. Start the drive mechanism 309 to drive the lead screw 307 to rotate, so that the moving block 308 can drive the air outlet nozzle 314 to move under the limiting sliding cooperation between the sliding plate 313 and the slide rail 310, and then the hot air tinning and leveling work can be carried out on the surface of the PCB engineering panel 4.

[0038] Compared with the prior art, the tin spraying mechanism for tinning PCB gold fingers can adapt to the tinning and drying work of PCB gold finger plates with different thicknesses through the cooperation of the mounting frame 2 on the top of the conveyor belt main body 1, the hot air tin spraying assembly 300, and the PCB engineering panel 4. Moreover, it can also improve the tinning method of the PCB gold finger so that it can cooperate with this tin spraying mechanism for use, thereby further improving the quality and stability of the tinning process of the PCB gold finger, effectively enhancing the practicality of the tin spraying mechanism for tinning PCB gold fingers, and solving the problem that the side tape is easily blown open due to the non-concentrated wind force and poor adaptability to plates with different thicknesses when the existing PCB gold fingers are hot air leveled after being soaked in a tin bath at high temperature.

[0039] All the electrical components mentioned in the text are electrically connected to the main controller and the power supply. The provision of the power supply belongs to the common knowledge in the field. The main controller can be a conventional known device such as a computer for control, which can be realized by simple programming by those skilled in the art, and all are existing publicly disclosed electrical connection technologies, which will not be elaborated in the text.

[0040] It should be noted that the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0041] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model.

Claims

1. A tin spraying mechanism for tinning PCB gold fingers, comprising a conveyor belt body (1), characterized in that: A mounting frame (2) with openings on both sides is fixed to the outside of the top of the conveyor belt body (1), a hot air tin spraying assembly (300) is installed on the inside of the mounting frame (2), and a plurality of PCB engineering panels (4) are placed on the top of the conveyor belt body (1); The hot air tin spraying assembly (300) comprises a proximity sensor (301) fixedly mounted on the inner rear side wall of the installation frame (2), an electric push rod (302) passing through and fixedly mounted on the top of the installation frame (2), a hot air leveling tin spraying mechanism (303) fixedly mounted on the top of the installation frame (2), a delivery pipe (304) fixedly mounted on the output end of the hot air leveling tin spraying mechanism (303), a metal bellows (305) fixedly mounted on the bottom end of the delivery pipe (304), a moving box (306) fixedly mounted on the output shaft of the electric push rod (302), a moving component mounted on the inner side of the moving box (306), an air outlet (314) fixedly mounted on the bottom of the moving component, and a laser sensor (315) fixedly mounted on the front of the air outlet (314).

2. The tin spraying mechanism for tinning PCB gold fingers according to claim 1, characterized in that: The moving component comprises a screw rod (307) rotatably connected to the inner side of a moving box (306) through a bearing, a moving block (308) threadedly connected to the outer side of the screw rod (307), a driving mechanism (309) fixedly mounted on the front side of the moving box (306), two slide rails (310) respectively fixedly mounted on the left and right sides of the moving box (306), a connecting block (311) fixed to the bottom of the moving block (308), a fixing plate (312) fixed to the bottom of the connecting block (311), and two sliding plates (313) fixed to the top of the fixing plate (312).

3. The tin spraying mechanism for tinning PCB gold fingers according to claim 2, characterized in that: The bottom of the moving box (306) is provided with a sliding hole for the connecting block (311) to slide, and the output shaft of the driving mechanism (309) passes through the front side of the moving box (306) and is fixedly connected to one end of the front side of the screw rod (307).

4. The tin spraying mechanism for tinning PCB gold fingers according to claim 2, characterized in that: The two sliding plates (313) are each provided with a sliding groove on one side opposite to the other, into which the sliding rail (310) on the same side can be inserted and slid, and the front and back sides of the sliding groove are both open.

5. The tin-spraying mechanism for tinning PCB gold fingers according to claim 2, characterized in that: The air outlet nozzle (314) is fixed to the bottom of the fixing plate (312); the bottom of the air outlet nozzle (314) is open, and the bottom opening is rectangular.

6. The tin-spraying mechanism for tinning PCB gold fingers according to claim 1, characterized in that: The proximity sensor (301) corresponds to the position of the PCB engineering panel (4), and the proximity sensor (301), the air outlet nozzle (314) and the laser sensor (315) are all located in the same longitudinal horizontal plane.

7. The tin-spraying mechanism for tinning PCB gold fingers according to claim 1, characterized in that: The bottom end of the delivery pipe (304) passes through the top of the installation frame (2), and the end of the metal bellows (305) away from the delivery pipe (304) passes through the outside of the air outlet nozzle (314) and is connected to the inside thereof.

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