Tin immersion equipment for circuit board manufacturing

Abstract

The invention belongs to the technical field of circuit board tin immersion, and particularly relates to tin immersion equipment for circuit board manufacturing, which comprises a fixed frame, an electric sliding rail and a sliding plate, and further comprises an electric push rod, an adjustable clamping jaw machine, a tin immersion frame, a supporting net and the like, an electric push rod is installed on the sliding plate, an adjustable clamping jaw machine is connected to a telescopic rod of the electric push rod, a tin dipping frame is connected to the lower portion of the fixing frame, and a supporting net for supporting the circuit board is arranged on the upper portion of the tin dipping frame. A circuit board is placed on a supporting net to be subjected to tin immersion by controlling an electric sliding rail, an electric push rod and an adjustable clamping jaw machine, redundant tin immersion liquid on the circuit board is scraped off by enabling a scraper to move leftwards, and then the circuit board subjected to tin immersion is conveyed through an electric rolling wheel and a belt; therefore, residual tin immersion liquid is prevented from remaining on the surface of the circuit board, and the tin immersion quality of the circuit board is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of tinning of circuit boards, and in particular relates to tinning equipment for manufacturing circuit boards. Background Art

[0002] Circuit board, also known as printed circuit board, is one of the most important components of electronic products. It prints circuit patterns on the surface of insulating materials and installs components to connect circuits together, thereby realizing the functions of electronic products. Circuit boards need to be tinned during the production process. Tinning can prevent circuit boards from oxidation, strengthen the connection between solder joints and circuit boards, reduce welding temperatures, and provide excellent electrical properties.

[0003] A Chinese patent with patent publication number CN111745246B discloses an automatic tin dipping machine, including a box body and an immersion tank, wherein a cavity is opened at the lower side of the box body, and installation cavities are opened at both sides of the box body, and a motor is installed inside the cavity through a machine base, and a cross bar is installed in the cavity, and a passive worm and an active worm gear are respectively installed on the cross bar, and a vertical rod is arranged inside the installation cavity.

[0004] The above patent places the circuit board in a tray, controls the movement of the tray to immerse the circuit board in a soaking tank, and then takes the circuit board out through the tray after immersion. At this time, some immersion liquid may remain on the circuit board, which may cause the immersion liquid to accumulate on the circuit board, resulting in reduced quality of the circuit board. Summary of the invention

[0005] In order to overcome the disadvantage of the existing tinning technology that the tinning liquid will remain on the circuit board and thus lead to reduced quality, the purpose of the present invention is to provide a tinning equipment for circuit board manufacturing that can be scraped and has high tinning quality for the circuit board.

[0006] A tinning equipment for manufacturing circuit boards includes a fixed frame, an electric slide rail and a sliding plate, an electric push rod, an adjustable clamping machine, a tinning frame, a supporting net, a scraper and a conveying assembly. The electric slide rail is installed on the upper part of the fixed frame, and the sliding plate is slidably connected to the electric slide rail. The electric push rod is installed on the sliding plate. The telescopic rod of the electric push rod is connected to the adjustable clamping machine. The lower part of the fixed frame is connected to the tinning frame. The upper part of the tinning frame is provided with a supporting net for supporting the circuit board. The upper part of the tinning frame is slidably connected to a scraper for scraping off the tinning liquid remaining on the surface of the circuit board. The fixed frame is provided with a conveying assembly for transporting the circuit board.

[0007] Furthermore, the conveying assembly includes an electric rotating rod, a conveyor belt, a blocking plate, an electric roller, a belt, a sliding frame and a coil spring. A plurality of electric rotating rods are rotatably connected to the lower part of the fixed frame. Two conveyor belts for conveying circuit boards are wound between the electric rotating rods. A blocking plate for blocking the circuit boards on the conveyor belts is connected to the middle of the fixed frame. A sliding frame is slidably connected to the right part of the fixed frame. Four coil springs are connected between the sliding frame and the fixed frame. Two groups of electric rollers are rotatably connected to the lower part of the sliding frame, and belts are wound between the same group of electric rollers.

[0008] Furthermore, it also includes a compression spring, a sliding rod and an extrusion plate. The lower part of the sliding plate is slidably connected to two sliding rods, compression springs are connected between the sliding rods and the sliding plates, and the sliding rods are connected to the extrusion plates.

[0009] Furthermore, it also includes a discharge mechanism, which includes a connecting block, an extrusion rod, a reset spring, a covering cylinder, a stretching spring and a connecting frame. The front and rear sides of the scraper are connected to the connecting blocks. The extrusion plate will extrude the connecting block when it moves to the left. The connecting block and the tinning frame are connected with a reset spring. The left part of the scraper is connected to a number of extrusion rods. The upper part of the tinning frame is provided with circular holes equal to the number of the extrusion rods. The extrusion rods will enter the adjacent circular holes when they move to the left. The left part of the tinning frame is slidably connected to a covering cylinder equal to the number of the circular holes. Two stretching springs are connected between the covering cylinder and the tinning frame. The left part of the tinning frame is connected to a connecting frame.

[0010] Furthermore, it also includes heating tubes, and a plurality of heating tubes are installed at the bottom of the tin-immersion frame.

[0011] Furthermore, it also includes a storage box and a conveying pipe. The left part of the fixing frame is connected to the storage box, and the right part of the storage box is connected to the conveying pipe. The conveying pipe is located above the tin immersion frame.

[0012] Furthermore, it also includes a servo motor, a synchronous belt, a rotating block and a protrusion. Two servo motors are installed on the left side of the sliding frame. Both sides of the sliding frame are rotatably connected with a number of rotating blocks that cause the circuit board to vibrate. The rotating blocks will contact the circuit board when they rotate. Two of the rotating blocks are connected to the output shafts of adjacent servo motors. The rotating blocks on different sides are connected to the sides close to each other with protrusions, and all the rotating blocks are transmitted through synchronous belts.

[0013] Furthermore, a collecting frame is also included. The left part of the fixing frame is connected with the collecting frame, and the collecting frame is located below the sliding frame.

[0014] Furthermore, the left part of the extrusion plate and the upper part of the connection block are both arranged with inclined surfaces, and the extrusion plate will squeeze the connection block when it moves to the left.

[0015] Furthermore, the rotating block is a semicircular block, and the protrusions are all located at the eccentric position of the rotating block.

[0016] Beneficial effects of the present invention: 1. The present invention controls the electric slide rail, the electric push rod and the adjustable clamping machine to place the circuit board on the support net for tinning, and scrapes off the excess tinning liquid on the circuit board by moving the scraper to the left, and then transports the tinned circuit board through the electric roller and the belt, thereby avoiding excess tinning liquid from remaining on the surface of the circuit board, thereby ensuring the tinning quality of the circuit board.

[0017] 2. The present invention moves the scraper by squeezing the connecting block by moving the squeezing plate to the left, without manual operation, thereby reducing the manual workload; and then squeezes the covering cylinder by the squeezing rod to separate the covering cylinder from the circular hole, so that the scraped waste tin leaching liquid can flow out of the circular hole.

[0018] 3. The present invention controls the heating tube to keep the tinning liquid at a good temperature, thereby ensuring the quality of the tinning; and controls the servo motor to make the rotating block rotate to drive the circuit board to vibrate, so that the excess tinning liquid on the circuit board falls off, thereby ensuring the quality of the tinning of the circuit board. The fallen tinning liquid will flow into the collection frame for collection, thereby avoiding the random discharge of the tinning liquid to pollute the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the fixing frame, the electric slide rail and the sliding plate of the present invention.

[0021] Figure 3 It is a structural schematic diagram of the electric push rod and the adjustable jaw machine of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the conveying assembly of the present invention.

[0023] Figure 5 It is a schematic structural diagram of the compression spring, the sliding rod and the extrusion plate of the present invention.

[0024] Figure 6 It is a schematic structural diagram of the connecting block, the extrusion rod, the covering cylinder and other components of the present invention.

[0025] Figure 7 It is a structural schematic diagram of the discharge mechanism of the present invention.

[0026] Figure 8 It is a schematic diagram of the structure of the servo motor, synchronous belt, rotating block and other components of the present invention.

[0027] In the above drawings: 1: fixed frame, 2: electric slide rail, 3: sliding plate, 4: electric push rod, 5: adjustable gripper, 6: tinning frame, 7: supporting net, 8: scraper, 91: electric rotating rod, 92: conveyor belt, 93: blocking plate, 94: electric roller, 95: belt, 96: sliding frame, 97: spiral spring, 101: compression spring, 102: sliding rod, 103: extrusion plate, 112: connecting block, 113: extrusion rod, 114: reset spring, 115: round hole, 116: covering cylinder, 117: tension spring, 118: connecting frame, 121: heating tube, 131: storage box, 132: conveyor pipe, 141: servo motor, 142: synchronous belt, 143: rotating block, 144: bump, 151: collecting frame. DETAILED DESCRIPTION

[0028] The present invention will now be described more fully below with reference to the accompanying drawings, in which currently preferred embodiments of the present invention are shown. However, the present invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and these embodiments fully convey the scope of the present invention to the skilled person.

[0029] Embodiment 1: A tinning equipment for manufacturing circuit boards, such as Figure 1-Figure 8 As shown, it includes a fixed frame 1, an electric slide rail 2, a sliding plate 3, an electric push rod 4, an adjustable clamp 5, a tinning frame 6, a supporting net 7, a scraper 8 and a conveying assembly. The electric slide rail 2 is installed on the upper part of the fixed frame 1, and the sliding plate 3 is slidably connected to the electric slide rail 2. The electric push rod 4 is bolted to the sliding plate 3, and the adjustable clamp 5 is fixedly connected to the telescopic rod of the electric push rod 4. The tinning frame 6 is fixedly connected to the lower part of the fixed frame 1. The upper part of the tinning frame 6 is provided with a supporting net 7. The upper part of the tinning frame 6 is slidably connected with a scraper 8, and the scraper 8 can scrape the surface of the circuit board on the supporting net 7. The fixed frame 1 is provided with a conveying assembly for transporting the circuit board.

[0030] like Figure 1 , Figure 4 and Figure 8 As shown, the conveying assembly includes an electric rotating rod 91, a conveying belt 92, a blocking plate 93, an electric roller 94, a belt 95, a sliding frame 96 and a coil spring 97. Two electric rotating rods 91 are rotatably connected to the lower part of the fixed frame 1, and two conveying belts 92 are wound between the two electric rotating rods 91. A blocking plate 93 is fixedly connected to the middle part of the fixed frame 1. A sliding frame 96 is slidably connected to the right part of the fixed frame 1. Four coil springs 97 are fixedly connected between the sliding frame 96 and the fixed frame 1. Two groups of electric rollers 94 are rotatably connected to the lower part of the sliding frame 96, and belts 95 are wound between the same group of electric rollers 94.

[0031] First, place the circuit board on the conveyor belt 92, control the electric rotating rod 91, so that the electric rotating rod 91 drives the conveyor belt 92 to rotate and then drives the circuit board to move to the left, and then control the electric push rod 4, so that the telescopic rod of the electric push rod 4 moves downward, and then the adjustable clamping machine 5 moves downward together. The adjustable clamping machine 5 moves downward and contacts with the circuit board, and then control the adjustable clamping machine 5 to clamp the circuit board, and then control the electric push rod 4, so that the telescopic rod of the electric push rod 4 moves upward, thereby driving the circuit board to move upward together, and then control the electric slide rail 2, so that the sliding plate 3 slides to the left, thereby driving the electric push rod 4, the adjustable clamping machine 5 and the circuit board to move to the left together, when the circuit board moves to the top of the tinning frame 6, similarly control the electric push rod 4 again, so that the line board moves downward and contacts with the supporting net 7, at this time The circuit board will fully contact the tinning liquid in the tinning frame 6, and then the circuit board is tinned.

[0032] When the circuit board is tinned, the scraper 8 is manually pushed to move to the left. The leftward movement of the scraper 8 will scrape off the residual tinning liquid on the surface of the circuit board on the support net 7, thereby avoiding excess tinning liquid remaining on the surface of the circuit board, thereby ensuring the tinning quality of the circuit board. Similarly, the electric push rod 4 is continued to be controlled to move the circuit board upward after tinning, and the electric slide rail 2 is controlled to make the circuit board move upward and to the left at the same time. When the circuit board moves to the top of the sliding frame 96 after tinning, the electric push rod 4 is controlled again to place the circuit board on the belt 95 in the sliding frame 96, and then the electric roller 94 is controlled to rotate the belt 95, thereby transporting the circuit board after tinning, so that there is no need for manual collection, saving time and labor.

[0033] Embodiment 2: Based on embodiment 1, Figure 1 and Figure 5 As shown, it also includes a compression spring 101, a sliding rod 102 and an extrusion plate 103. The lower part of the sliding plate 3 is slidably connected to two sliding rods 102. The left part of the extrusion plate 103 is set as an inclined surface. The compression spring 101 is fixedly connected between the sliding rod 102 and the sliding plate 3, and the lower part of the sliding rod 102 is fixedly connected to the extrusion plate 103.

[0034] like Figure 6 and Figure 7As shown, it also includes a discharge mechanism, which includes a connecting block 112, an extrusion rod 113, a return spring 114, a covering cylinder 116, a tension spring 117 and a connecting frame 118. The front and rear sides of the scraper 8 are fixedly connected with the connecting block 112, and the upper part of the connecting block 112 is set as an inclined surface. The return spring 114 is fixedly connected between the connecting block 112 and the tinning frame 6. The extrusion plate 103 moves to the left to squeeze the connecting block 112. When the extrusion plate 103 and the connecting block 112 are in contact, the extrusion plate 103 continues to move to the left and is squeezed by the connecting block 112, thereby causing the extrusion plate 103 to move upward. At this time, the extrusion plate 1 03 then the connecting block 112 is no longer squeezed, and the reset spring 114 is restored, so that the scraper 8 moves to the right and returns to its original position. A number of squeezing rods 113 are fixedly connected to the left part of the scraper 8. The upper part of the tinning frame 6 is provided with circular holes 115 equal in number to the squeezing rods 113. The squeezing rods 113 move to the left and enter the adjacent circular holes 115. The left part of the tinning frame 6 is slidably connected with covering cylinders 116 equal in number to the circular holes 115. The covering cylinders 116 can cover the adjacent circular holes 115. Two tension springs 117 are fixedly connected between the covering cylinders 116 and the tinning frame 6. The left part of the tinning frame 6 is fixedly connected with a connecting frame 118.

[0035] When the sliding plate 3 moves to the left, it will drive the sliding rod 102 and the extrusion plate 103 to move to the left together. The extrusion plate 103 moves to the left and contacts with the connecting block 112. When the extrusion plate 103 continues to move to the left, the extrusion plate 103 will squeeze the connecting block 112, so that the connecting block 112 moves to the left together, thereby driving the scraper 8 to move to the left together. The reset spring 114 is compressed, and the scraper 8 moves to the left to scrape the circuit board on the supporting net 7, thereby eliminating the need for manual operation and reducing manual workload. The scraper 8 moves to the left and drives the extrusion rod 113 to move to the left. The extrusion rod 113 moves to the left and enters the circular hole 115. The extrusion rod 113 continues to follow the scraper 8 to move to the left and squeezes the covering cylinder 116, so that the covering cylinder 116 moves to the left and separates from the circular hole 115, and the tension spring 117 is compressed. At this time, the scraped tin leaching waste liquid can be discharged from the circular hole 115 and then dropped onto the connecting frame 118. The sliding plate 3 drives the extrusion plate 103 to continue to move to the left. Since the left part of the extrusion plate 103 and the upper part of the connecting block 112 are both inclined, the connecting block 112 will squeeze the extrusion plate 103. , causing the extrusion plate 103 to move upward, at this time the compression spring 101 is compressed, the extrusion plate 103 no longer squeezes the connecting block 112, the reset spring 114 is restored, the connecting block 112 and the scraper 8 move to the right together for reset, thereby facilitating the scraping of the next circuit board, the extrusion rod 113 also returns to its original position along with the scraper 8, the extrusion rod 113 no longer squeezes the covering tube 116, the tension spring 117 is restored, and then the covering tube 116 moves to the right for restoration, when the connecting block 112 is separated from the extrusion plate 103, the compression spring 101 is restored, causing the extrusion plate 103 to move downward and return to its original position.

[0036] like Figure 1 and Figure 7 As shown, it also includes a heating tube 121, and two heating tubes 121 are installed at the bottom of the tinning frame 6. It also includes a storage box 131 and a delivery pipe 132. The left part of the fixing frame 1 is fixedly connected to the storage box 131, and the right part of the storage box 131 is fixedly connected to the delivery pipe 132. The delivery pipe 132 is located above the tinning frame 6.

[0037] The heating tube 121 is controlled, and the heating tube 121 can heat the tinning liquid in the tinning frame 6, so that the tinning liquid maintains a good temperature, and thus the quality of the tinning can be guaranteed. As the scraper 8 scrapes the tinning liquid, the tinning liquid in the tinning frame 6 will become less and less. At this time, the delivery tube 132 is controlled, and the tinning liquid in the storage box 131 can enter the tinning frame 6 through the delivery tube 132, so as to replenish the tinning liquid.

[0038] like Figure 1 and Figure 8 As shown, it also includes a servo motor 141, a synchronous belt 142, a rotating block 143 and a protrusion 144. Two servo motors 141 are bolted to the left side of the sliding frame 96. A number of rotating blocks 143 are rotatably connected to the front and rear sides of the sliding frame 96. The rotating blocks 143 will contact the circuit board when they rotate. The two rotating blocks 143 on the left are fixedly connected to the output shaft of the servo motor 141. The rotating blocks 143 on different sides are close to each other and are connected to the side with protrusions 144. The rotating blocks 143 are semicircular blocks, and the protrusions 144 are all located at the eccentricity of the rotating blocks 143. When the rotating blocks 143 rotate, since the protrusions 144 are all located at the eccentricity of the rotating blocks 143, the rotating blocks 143 can rotate and thus make the circuit board on the belt 95 vibrate, so that the excess tin immersion liquid on the circuit board falls off, thereby ensuring the tin immersion quality of the circuit board. All the rotating blocks 143 are driven by the synchronous belt 142.

[0039] like Figure 1 As shown, a collecting frame 151 is also included. The collecting frame 151 is fixedly connected to the left part of the fixing frame 1 . The collecting frame 151 is located below the sliding frame 96 . The tin immersion waste liquid on the connecting frame 118 can also flow into the collecting frame 151 .

[0040] The servo motor 141 is controlled to drive the rotating block 143 through the synchronous belt 142, thereby driving the protrusion 144 to rotate together. Since the rotating block 143 is a semicircular block and the protrusions 144 are all located at the eccentric position of the rotating block 143, the rotating block 143 will cause the circuit board to vibrate during the rotation process, so that the excess tin immersion liquid on the circuit board will fall off, thereby ensuring the tin immersion quality of the circuit board. The fallen tin immersion liquid will flow into the collection frame 151 for collection, thereby preventing the tin immersion liquid from being discharged and polluting the environment.

[0041] Although the present disclosure has been described with respect to only a limited number of embodiments, those skilled in the art having benefit of this disclosure will appreciate that various other embodiments can be devised without departing from the scope of the present invention. Accordingly, the scope of the present invention should be limited only by the appended claims.

Claims

1. A tinning device for manufacturing circuit boards, comprising a fixed frame (1), an electric slide rail (2) and a sliding plate (3), characterized in that: The invention also comprises an electric push rod (4), an adjustable gripper (5), a tinning frame (6), a support net (7), a scraper (8) and a conveying assembly. An electric slide rail (2) is installed on the upper part of the fixed frame (1). A sliding plate (3) is slidably connected to the electric slide rail (2). The sliding plate (3) is installed on the electric push rod (4). The telescopic rod of the electric push rod (4) is connected to the adjustable gripper (5). The lower part of the fixed frame (1) is connected to the tinning frame (6). A support net (7) for supporting the circuit board is provided on the upper part of the tinning frame (6). A scraper (8) for scraping off the tinning liquid remaining on the surface of the circuit board is slidably connected to the upper part of the tinning frame (6). A conveying assembly for transporting the circuit board is provided on the fixed frame (1).

2. A tinning equipment for manufacturing a circuit board according to claim 1, characterized in that: The conveying assembly comprises an electric rotating rod (91), a conveying belt (92), a blocking plate (93), an electric roller (94), a belt (95), a sliding frame (96) and a coil spring (97). The lower part of the fixed frame (1) is rotatably connected to a plurality of electric rotating rods (91), two conveying belts (92) for conveying circuit boards are wound between the electric rotating rods (91), the middle part of the fixed frame (1) is connected to a blocking plate (93) for blocking the circuit boards on the conveying belts (92), the right part of the fixed frame (1) is slidably connected to a sliding frame (96), a coil spring (97) is connected between the sliding frame (96) and the fixed frame (1), the lower part of the sliding frame (96) is rotatably connected to two groups of electric rollers (94), and a belt (95) is wound between the same group of electric rollers (94).

3. A tinning equipment for manufacturing a circuit board according to claim 2, characterized in that: The invention also comprises a compression spring (101), a sliding rod (102) and an extrusion plate (103); the lower part of the sliding plate (3) is slidably connected to two sliding rods (102); a compression spring (101) is connected between the sliding rods (102) and the sliding plate (3); and an extrusion plate (103) is connected to the sliding rods (102).

4. A tinning equipment for manufacturing a circuit board according to claim 3, characterized in that: The invention also comprises a discharge mechanism, which comprises a connection block (112), an extrusion rod (113), a return spring (114), a covering cylinder (116), a tension spring (117) and a connection frame (118). The front and rear sides of the scraper (8) are both connected to the connection block (112). When the extrusion plate (103) moves to the left, the connection block (112) is extruded. The return spring (114) is connected between the connection block (112) and the tinning frame (6). The left side of the scraper (8) is connected to A plurality of squeezing rods (113) are provided on the upper part of the tinning frame (6), and the number of circular holes (115) is equal to the number of squeezing rods (113). When the squeezing rods (113) move to the left, they will enter the adjacent circular holes (115). The left part of the tinning frame (6) is slidably connected with covering cylinders (116) equal to the number of circular holes (115). Tension springs (117) are connected between the covering cylinders (116) and the tinning frame (6). The left part of the tinning frame (6) is connected with a connecting frame (118).

5. A tinning equipment for manufacturing a circuit board according to claim 4, characterized in that: It also includes a heating tube (121), and a plurality of heating tubes (121) are installed at the bottom of the tin-immersion frame (6).

6. A tinning equipment for manufacturing a circuit board according to claim 5, characterized in that: It also includes a storage box (131) and a delivery pipe (132). The left part of the fixed frame (1) is connected to the storage box (131), and the right part of the storage box (131) is connected to the delivery pipe (132). The delivery pipe (132) is located above the tinning frame (6).

7. A tinning equipment for manufacturing a circuit board according to claim 6, characterized in that: The invention also comprises a servo motor (141), a synchronous belt (142), a rotating block (143) and a convex block (144). Two servo motors (141) are installed on the left part of the sliding frame (96). Both sides of the sliding frame (96) are rotatably connected with a plurality of rotating blocks (143) for vibrating the circuit board. The rotating blocks (143) will contact the circuit board when they rotate. Two rotating blocks (143) are connected to the output shafts of the adjacent servo motors (141). The rotating blocks (143) on different sides are connected to the sides close to each other with convex blocks (144). All the rotating blocks (143) are driven by the synchronous belt (142).

8. A tinning equipment for manufacturing a circuit board according to claim 7, characterized in that: It also includes a collecting frame (151), the left part of the fixing frame (1) is connected with the collecting frame (151), and the collecting frame (151) is located below the sliding frame (96).

9. A tinning equipment for manufacturing a circuit board according to claim 8, characterized in that: The left part of the extrusion plate (103) and the upper part of the connection block (112) are both arranged with inclined surfaces, and the extrusion plate (103) will squeeze the connection block (112) when it moves to the left.

10. A tinning equipment for manufacturing a circuit board according to claim 9, characterized in that: The rotating block (143) is a semicircular block, and the protrusions (144) are all located at the eccentric position of the rotating block (143).

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