A resin plugging device for PCB board holes

Abstract

The present invention belongs to the technical field of PCB board processing, and relates to a device for plugging holes with resin in PCB board holes, including a workbench, a support frame, an electric guide rail, a mobile frame, a placement frame, a silk screen mechanism, an air suction mechanism and an extrusion mechanism. The top of the workbench is connected to support frames on both sides, the tops of the two support frames are connected to electric guide rails, a mobile frame is connected between the moving bodies of the two electric guide rails, a placement frame for placing PCB boards is connected in the middle of the top of the workbench, a silk screen mechanism for silk screen processing of PCB boards is provided on the mobile frame, an air suction mechanism is provided on the placement frame, and an extrusion mechanism is provided on the silk screen mechanism. While the present invention fills the holes of the PCB board with resin by silk screen printing, it can generate negative pressure in the holes by moving the piston rod to suck the resin into the holes, so that the resin will not be affected by the resistance of the air in the holes, ensuring that the resin can better fill the holes on the PCB board and ensure the quality of the product.

Description

Technical Field

[0001] The invention belongs to the technical field of PCB board processing and relates to a resin plugging device for PCB board holes. Background Art

[0002] In the PCB (printed circuit board) manufacturing process, hole processing is a very critical step. As electronic products become smaller and more powerful, the requirements for PCBs are also increasing, especially in terms of hole processing technology. Holes are not only an indispensable component of circuit boards, used to connect lines on different layers, but sometimes they also need to be closed or filled to meet specific design requirements. Among them, resin plugging technology is a commonly used solution, mainly used to prevent signal leakage and improve the overall reliability of circuit boards.

[0003] At present, the method for plugging holes in PCB boards is to use a screen printer to print resin through a screen so that the resin enters the holes of the PCB board. However, in the actual operation, after the PCB is placed on a workbench, the screen printer scrapes the resin into the hole to complete the plugging. In this process, the air in the hole is replaced by the resin, but because the air in the hole is quickly squeezed by the resin, the air will encounter resistance when it is discharged, which easily makes it difficult for the resin to completely fill the hole, thereby affecting the resin from smoothly entering and completely filling the hole of the PCB, and ultimately causing product defects and affecting product quality. Summary of the invention

[0004] In view of this, the present invention provides a resin plugging device for PCB board holes.

[0005] The technical solution is: a device for resin plugging holes in PCB boards, including a workbench, a support frame, an electric guide rail, a mobile frame, a placement frame, a silk screen mechanism, an air suction mechanism and an extrusion mechanism. Support frames are connected to both sides of the top of the workbench, the tops of the two support frames are connected to the electric guide rails, a mobile frame is connected between the moving bodies of the two electric guide rails, a placement frame for placing PCB boards is connected in the middle of the top of the workbench, a silk screen mechanism for silk screen processing on the PCB board is provided on the mobile frame, an air suction mechanism for generating negative pressure in the holes of the PCB board is provided on the placement frame, and an extrusion mechanism is provided on the silk screen mechanism.

[0006] Furthermore, the silk-screen printing mechanism includes a sliding bracket, a cylinder 1, a mounting frame, a scraper, a cylinder 2 and a silk-screen screen frame, the sliding brackets are slidably connected on both sides of the movable frame, the cylinder 1s are installed on both sides of the top of the mounting frame, the telescopic rods of the two cylinders 1s are respectively connected to the two sliding brackets, the bottom of the sliding bracket is connected to the mounting frame, the two mounting frames are connected to the scraper on the sides close to each other, two cylinders 2 are installed on the bottom of the two support frames, the silk-screen screen frame is connected between the telescopic rods of the four cylinders 2, and the silk-screen screen frame is located between the placement frame and the scraper.

[0007] Furthermore, the suction mechanism includes a connecting plate, an elastic member, a pressure plate and a piston rod. A plurality of piston rods are slidingly connected to the placement rack at even intervals. The plurality of piston rods are evenly distributed in an array on the placement rack. The number and distribution intervals of the piston rods are consistent with the number and distribution intervals of holes on the PCB board. A connecting plate is connected between the bottoms of the plurality of piston rods in the same vertical direction. An elastic member is connected between the connecting plate and the placement rack. Pressure plates are connected to both sides of the top of the connecting plate.

[0008] Furthermore, the extrusion mechanism includes an extrusion shaft, a U-shaped frame and an extrusion rod, wherein the extrusion shaft is connected on both sides of one mounting frame, the extrusion rod is slidably connected on both sides of the silk screen frame, the pressure plate is located at the moving track of the extrusion rod, the upper part of the extrusion rod is connected to the U-shaped frame, and the extrusion shaft is located in the U-shaped frame.

[0009] Furthermore, it also includes a locking mechanism, which includes a locking frame, a locking rod, an electric push rod, a pushing frame, a sliding frame, an extension shaft and two elastic members, locking frames are slidably connected to both sides of the connecting plate, and two elastic members are connected between the locking frame and the connecting plate, two sliding frames are slidably connected to the upper parts of both sides of the placement frame, a locking rod is connected between the two sliding frames on the same side, an inclined surface is provided at the lower part of the locking frame, the inclined surface on the locking frame is aligned with the locking rod, an electric push rod is installed in the middle of the top of the workbench, the telescopic rod of the electric push rod is connected to the pushing frame, two inclined grooves are provided on the upper parts of both sides of the pushing frame, the sliding frame is connected to the extension shaft, and the extension shaft is located in the inclined groove.

[0010] Furthermore, a blocking mechanism is included, which includes a sliding block, a blocking plate and a locking bolt. The sliding blocks are slidably connected to both sides of the mounting frame. The locking bolts are threadedly connected to the sliding blocks. The sides of the two sliding blocks that are away from each other are connected to the blocking plates.

[0011] Furthermore, it also includes an air supply pipe and an air outlet pipe. One side of the placement rack is connected to the air supply pipe, and the other side of the placement rack is connected to the air outlet pipe.

[0012] Furthermore, a sealing ring is included, and the outer ring of the piston position of the piston rod is connected with a circle of sealing ring.

[0013] Compared with the prior art, the present invention has the following advantages: 1. While filling the holes of the PCB board with resin by silk screen printing, the present invention can generate negative pressure in the holes by moving the piston rod to suck the resin into the holes, so that the resin will not be affected by the resistance of the air in the holes, thereby ensuring that the resin can better fill the holes on the PCB board and ensure the quality of the product.

[0014] 2. After the resin is filled into the holes of the PCB board, the present invention can input hot air through the air pipe, so that the resin is preheated and cured to adhere to the hole position of the PCB board, thereby avoiding the resin dripping due to the resin not being cured after the PCB board is taken out. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the local three-dimensional structure of the present invention.

[0017] Figure 3 It is a schematic structural diagram of the air suction mechanism and the screen printing mechanism of the present invention.

[0018] Figure 4 It is a structural schematic diagram of the air suction mechanism of the present invention.

[0019] Figure 5 It is a schematic diagram of the structures of the suction mechanism, the extrusion mechanism and the locking mechanism of the present invention.

[0020] Figure 6 It is a right side view of the suction mechanism, the squeezing mechanism and the locking mechanism of the present invention.

[0021] Figure 7 It is a structural schematic diagram of the extrusion mechanism of the present invention.

[0022] Figure 8 It is a structural schematic diagram of the locking mechanism of the present invention.

[0023] Fig. 9 It is a structural schematic diagram of the barrier mechanism of the present invention.

[0024] Fig.10 It is a schematic diagram of the structure of the gas transmission pipe, gas outlet pipe and placement rack of the present invention.

[0025] Fig.11 It is a schematic structural diagram of the piston rod and the sealing ring of the present invention.

[0026] Markings in the accompanying drawings: 1_workbench, 2_support frame, 3_electric guide rail, 4_mobile frame, 5_sliding bracket, 6_cylinder one, 7_mounting frame, 8_scraper, 9_placing frame, 10_silk screen frame, 11_cylinder two, 121_connecting plate, 122_elastic part one, 123_pressure plate, 124_piston rod, 131_extrusion shaft, 132_U-shaped frame, 133_extrusion rod, 141_locking frame, 142_locking rod, 143_electric push rod, 144_pushing frame, 145_sliding frame, 146_extension shaft, 147_elastic part two, 151_sliding block, 152_blocking plate, 153_locking bolt, 16_air supply pipe, 17_air outlet pipe, 18_sealing ring, 100_PCB board. DETAILED DESCRIPTION

[0027] Reference to an embodiment herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] A resin plugging device for PCB board holes, such as Figure 1-Figure 7 As shown, it includes a workbench 1, a support frame 2, an electric guide rail 3, a movable frame 4, a placement frame 9, a silk-screen mechanism, an air suction mechanism and an extrusion mechanism. The left and right sides of the top of the workbench 1 are connected to the support frames 2, the tops of the two support frames 2 are connected to the electric guide rails 3, the movable frame 4 is connected between the moving bodies of the two electric guide rails 3, the middle of the top of the workbench 1 is connected to the placement frame 9 for placing the PCB board 100, the movable frame 4 is provided with a silk-screen mechanism for silk-screening the PCB board 100, the placement frame 9 is provided with an air suction mechanism for generating negative pressure in the holes of the PCB board 100, and the silk-screen mechanism is provided with an extrusion mechanism.

[0029] like Figure 2 and Figure 3As shown, the silk-screen mechanism includes a sliding bracket 5, a cylinder 1 6, a mounting frame 7, a scraper 8, a cylinder 2 11 and a silk-screen screen frame 10, the front and rear sides of the movable frame 4 are slidably connected with the sliding bracket 5, the sliding bracket 5 can slide up and down along the mounting frame 7, the front and rear sides of the top of the mounting frame 7 are installed with a cylinder 1 6, the telescopic rods of the two cylinders 1 6 are respectively connected to the two sliding brackets 5, so that the operation of the cylinder 1 6 can drive the two sliding brackets 5 to move up and down, the bottom of the sliding bracket 5 is connected to the mounting frame 7, the sides of the two mounting frames 7 close to each other are connected with the scraper 8, the bottoms of the two support frames 2 are installed with two front and rear cylinders 2 11, the silk-screen screen frame 10 is connected between the telescopic rods of the four cylinders 2 11, the silk-screen screen frame 10 is located between the placement frame 9 and the scraper 8, and the height of the silk-screen screen frame 10 can be adjusted by the operation of the cylinder 2 11.

[0030] like Figure 3 and Figure 4 As shown, the suction mechanism includes a connecting plate 121, an elastic member 122, a pressure plate 123 and a piston rod 124. A plurality of piston rods 124 are evenly and slidably connected to the placement rack 9. The plurality of piston rods 124 are evenly spaced and arrayed on the placement rack 9. The number and distribution intervals of the piston rods 124 are consistent with the number and distribution intervals of the holes on the PCB board 100, so that when the PCB board 100 is placed on the placement rack 9, the piston rods 124 can be inserted into the holes of the PCB board 100. A connecting plate 121 is connected between the bottoms of the plurality of piston rods 124 in the same vertical direction. An elastic member 122 is connected between the connecting plate 121 and the placement rack 9. The elastic member 122 is a connecting spring. The pressure plate 123 is connected to both the front and rear sides of the top of the connecting plate 121.

[0031] like Figure 5-Figure 7 As shown, the extrusion mechanism includes an extrusion shaft 131, a U-shaped frame 132 and an extrusion rod 133. The left and right sides of the rear mounting frame 7 are connected to the extrusion shaft 131, and the left and right sides of the silk screen frame 10 are slidably connected to the extrusion rod 133. The pressure plate 123 is located at the moving track of the extrusion rod 133, so that the extrusion rod 133 can squeeze the pressure plate 123 to move when it moves. The upper part of the extrusion rod 133 is connected to the U-shaped frame 132, and the extrusion shaft 131 is located in the U-shaped frame 132 and can slide up and down in the U-shaped frame 132. When the extrusion shaft 131 moves, it can drive the extrusion rod 133 to move through the U-shaped frame 132.

[0032] like Figure 3 , Figure 5 , Figure 6 and Figure 8As shown, a locking mechanism is also included, and the locking mechanism includes a locking frame 141, a locking rod 142, an electric push rod 143, a pushing frame 144, a sliding frame 145, an extension shaft 146 and an elastic member 147. The front and rear sides of the connecting plate 121 are slidably connected to the locking frame 141, and an elastic member 147 is connected between the locking frame 141 and the connecting plate 121. The elastic member 147 is a reset spring. The upper parts of the front and rear sides of the placement frame 9 are slidably connected to two sliding frames 145, and the two sliding frames 145 on the same side are connected. A locking rod 142, a bevel is provided at the lower part of the locking frame 141, the bevel on the locking frame 141 is aligned with the locking rod 142, an electric push rod 143 is installed in the middle of the top of the workbench 1, and a pushing frame 144 is connected to the telescopic rod of the electric push rod 143, and two bevel grooves are provided on the upper parts of the front and rear sides of the pushing frame 144, and an extension shaft 146 is connected to the sliding frame 145, and the extension shaft 146 is located in the bevel groove, so that the pushing frame 144 can squeeze the extension shaft 146 through the bevel groove when moving, thereby driving the sliding frame 145 to move.

[0033] When it is necessary to fill the holes on the PCB board 100 with resin, the device can be used. When in use, first control the cylinder 11 to lift the screen frame 10, then place the PCB board 100 on the upper part of the placement frame 9, so that the piston rod 124 fills the holes in the PCB board 100, and then pour the resin into the screen frame 10, and then control the electric guide rail 3 to drive the moving frame 4 to move forward. At this time, the telescopic rod of the cylinder 16 on the rear side can be controlled to retract so that the sliding bracket 5, the mounting frame 7 and the scraper 8 on the rear side move downward, so that the scraper 8 on the rear side can contact the screen frame 10, and then in the process of moving the moving frame 4, the resin in the screen frame 10 can be scraped by the scraper 8 on the rear side, and when the mounting frame 7 moves, it can also be moved by The U-shaped frame 132 is pushed to move by the extrusion shaft 131. When the U-shaped frame 132 moves, it can drive the extrusion rod 133 to move. When the extrusion rod 133 moves, it will contact the side of the pressure plate 123 and press the pressure plate 123 to move downward. At this time, the scraper 8 also just scrapes the resin to the area above the pressure plate 123. When the pressure plate 123 moves downward, it can drive the connecting plate 121 to move downward. The elastic member 122 is stretched, and the connecting plate 121 drives the piston rod 124 to move downward. The downward movement of the piston rod 124 can generate negative pressure on the hole of the PCB board 100, so that the resin is sucked into the hole of the PCB board 100, thereby completing the work of filling the hole with resin. When the connecting plate 121 moves downward, it will also drive the locking frame 141 to move downward. When the fixed frame 141 moves downward to contact the locking rod 142, the inclined surface on the locking frame 141 will be squeezed by the locking rod 142 and move, and the elastic member 147 will be compressed until the locking frame 141 moves to no longer be squeezed by the locking rod 142. Under the action of the elastic member 147, the locking frame 141 is reset. At this time, the locking rod 142 can lock the locking frame 141, thereby fixing the connecting plate 121 to prevent the connecting plate 121 from resetting. When the moving frame 4 moves to the front side of the workbench 1, the holes in the PCB board 100 are also filled with resin. Then the PCB board 100 can be taken out, and then the telescopic rod of the electric push rod 143 is controlled to extend to drive the pushing frame 144 to move upward. When the pushing frame 144 moves upward, it can drive the extension shaft 146 through the inclined groove. When the extension shaft 146 moves, it can drive the sliding frame 145 and the locking rod 142 to move, so that the locking rod 142 is separated from the locking frame 141. At this time, the connecting plate 121 is reset under the action of the elastic member 122, and then the telescopic rod of the cylinder 16 on the front side can be controlled to retract and the telescopic rod of the cylinder on the rear side can be controlled to extend. After the operation is completed, the electric guide rail 3 is controlled to drive the moving frame 4 to move backward, so that the holes of the newly added PCB board 100 can be plugged with resin. This process is repeated, and the PCB board 100 can be plugged with resin using the device. During the process, the resin is sucked into the hole by generating negative pressure in the hole through the piston, which can ensure that each hole is filled with resin without missing any holes.The resin added in this embodiment is a thermosetting resin.

[0034] like Fig. 9 As shown, a blocking mechanism is also included, which includes a sliding block 151, a blocking plate 152 and a locking bolt 153. The sliding blocks 151 are slidably connected on both sides of the mounting frame 7. The locking bolts 153 are threadedly connected to the sliding blocks 151. The locking bolts 153 pass through the mounting frame 7 and can slide on the mounting frame 7. The locking bolts 153 can be rotated and moved downward through the threads between the sliding blocks 151 until the end of the locking bolt 153 abuts against the mounting frame 7, so that the locking bolt 153 and the sliding block 151 no longer move, and the sliding block 151 is fixed. The blocking plates 152 are connected to the sides of the two sliding blocks 151 that are away from each other.

[0035] When the scraper 8 moves, the locking bolt 153 can be loosened first, and then the blocking plate 152 can be pulled to slide along the mounting frame 7 according to the size of the placed PCB board 100, and the position of the blocking plate 152 can be adjusted so that the spacing between the two blocking plates 152 is consistent with the width of the PCB board 100. Then, when the scraper 8 scrapes the resin, the blocking plate 152 and the scraper 8 can be used to limit the resin, and the resin is confined to a range to avoid the resin from diffusing to the surroundings and causing waste.

[0036] like Fig.10 As shown, it also includes an air supply pipe 16 and an air outlet pipe 17. The air supply pipe 16 is connected to the left front side of the upper part of the placement rack 9, and the air outlet pipe 17 is connected to the right rear side of the upper part of the placement rack 9.

[0037] After the resin is injected onto the PCB board 100, hot air can be input into the placement rack 9 through the air supply pipe 16, so as to heat the PCB board 100, so that the resin on the PCB board 100 is heated and cured, and then the hot air can be discharged through the air outlet pipe 17. After the PCB board 100 is taken out, cold air is input again to cool the placement rack 9. In this way, after the resin is injected into the PCB board 100, the resin can be cured, so as to avoid the resin on the PCB board 100 from dripping when the PCB board 100 is taken out.

[0038] like Fig.11 As shown, a sealing ring 18 is also included. The outer ring of the piston position of the piston rod 124 is connected with a circle of sealing ring 18, so that when the piston of the piston rod 124 is located in the hole of the PCB board 100, it can better contact with the inner wall of the hole, thereby increasing the sealing between the piston rod 124 and the hole.

[0039] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A resin plugging device for PCB board holes, characterized in that: The invention comprises a workbench (1), a support frame (2), an electric guide rail (3), a movable frame (4), a placement frame (9), a screen printing mechanism, an air suction mechanism and an extrusion mechanism. The top of the workbench (1) is connected to support frames (2) on both sides, the tops of the two support frames (2) are connected to electric guide rails (3), the movable frame (4) is connected between the moving bodies of the two electric guide rails (3), the placement frame (9) for placing a PCB board (100) is connected to the middle of the top of the workbench (1), and the movable frame (4) is provided with a device for placing the PCB board (100). A screen printing mechanism for performing screen printing, wherein the placement frame (9) is provided with an air suction mechanism for generating negative pressure in the holes of a PCB board (100), the screen printing mechanism is provided with an extrusion mechanism, the screen printing mechanism comprises a sliding bracket (5), a cylinder 1 (6), a mounting frame (7), a scraper (8), a cylinder 2 (11) and a screen printing frame (10), the sliding bracket (5) is slidably connected to both sides of the moving frame (4), the cylinder 1 (6) is installed on both sides of the top of the mounting frame (7), and the telescopic rods of the two cylinders 1 (6) are respectively connected to the two sliding brackets. (5), the bottom of the sliding bracket (5) is connected to a mounting bracket (7), the sides of the two mounting brackets (7) close to each other are connected to a scraper (8), the bottom of the two support brackets (2) are installed with two cylinders (11), the telescopic rods of the four cylinders (11) are connected with a screen printing frame (10), the screen printing frame (10) is located between the placement bracket (9) and the scraper (8), the suction mechanism includes a connecting plate (121), an elastic member (122), a pressure plate (123) and a piston rod (124), the placement bracket ( 9) are evenly spaced and slidably connected to a plurality of piston rods (124), the plurality of piston rods (124) are evenly spaced and arrayed on the placement rack (9), the number and distribution interval of the piston rods (124) are consistent with the number and distribution interval of the holes on the PCB board (100), a connecting plate (121) is connected between the bottoms of the plurality of piston rods (124) in the same vertical direction, an elastic member (122) is connected between the connecting plate (121) and the placement rack (9), and pressure plates (123) are connected to both sides of the top of the connecting plate (121).

2. The device for plugging holes with resin in PCB boards according to claim 1, characterized in that: The extrusion mechanism comprises an extrusion shaft (131), a U-shaped frame (132) and an extrusion rod (133), wherein both sides of a mounting frame (7) are connected to the extrusion shaft (131), both sides of the screen printing frame (10) are slidably connected to the extrusion rod (133), the pressure plate (123) is located at the moving track of the extrusion rod (133), the upper part of the extrusion rod (133) is connected to the U-shaped frame (132), and the extrusion shaft (131) is located in the U-shaped frame (132).

3. The device for plugging holes with resin in PCB boards according to claim 2, characterized in that: The invention also comprises a locking mechanism, wherein the locking mechanism comprises a locking frame (141), a locking rod (142), an electric push rod (143), a pushing frame (144), a sliding frame (145), an extension shaft (146) and a second elastic member (147); the locking frames (141) are slidably connected to both sides of the connecting plate (121); the second elastic member (147) is connected between the locking frame (141) and the connecting plate (121); the upper parts of both sides of the placement frame (9) are slidably connected to two sliding frames (145); the two sliding frames on the same side are connected to the locking frames (141) and the second elastic member (147); A locking rod (142) is connected between the sliding frames (145); a bevel is provided at the bottom of the locking frame (141); the bevel on the locking frame (141) is aligned with the locking rod (142); an electric push rod (143) is installed in the middle of the top of the workbench (1); a push frame (144) is connected to the telescopic rod of the electric push rod (143); two bevel grooves are provided at the upper parts of both sides of the push frame (144); an extension shaft (146) is connected to the sliding frame (145); the extension shaft (146) is located in the bevel groove.

4. The device for plugging holes with resin in PCB boards according to claim 1, characterized in that: It also includes a blocking mechanism, which includes a sliding block (151), a blocking plate (152) and a locking bolt (153). The two sides of the mounting frame (7) are slidably connected to the sliding blocks (151), and the locking bolt (153) is threadedly connected to the sliding blocks (151). The two sliding blocks (151) are connected to the blocking plates (152) on the sides away from each other.

5. The device for plugging holes with resin in PCB boards according to claim 1, characterized in that: It also includes an air supply pipe (16) and an air outlet pipe (17); one side of the placement rack (9) is connected to the air supply pipe (16), and the other side of the placement rack (9) is connected to the air outlet pipe (17).

6. The device for plugging holes with resin in PCB boards according to claim 1, characterized in that: It also includes a sealing ring (18), and the outer ring of the piston position of the piston rod (124) is connected to a circle of the sealing ring (18).

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