A screen printing device for manufacturing a circuit board

Abstract

The application belongs to the technical field of circuit board processing and manufacturing, and relates to a silk screen printing device for manufacturing a circuit board, which comprises a base frame, a mounting plate, a side frame, a sliding block, a guide frame, a lifting cylinder, a silk screen frame and a silk screen assembly. The mounting plate is connected to the top of the base frame. The side frame is mounted on the mounting plate. Two sliding blocks are slidingly connected to the side frame. The guide frame is connected between the two sliding blocks. The lifting cylinder is mounted on the top of the mounting plate. The telescopic rod of the lifting cylinder is connected to the guide frame. The silk screen frame is connected between the two sliding blocks. The side frame is provided with the silk screen assembly for silk screen printing on the circuit board. After printing on one side of the circuit board, the driving motor can be controlled to rotate to drive the clamping frame to rotate, so that the circuit board is turned over, thereby achieving the effect of automatically turning over the circuit board. Manual turning over of the circuit board is not needed, and the situation of ink missing on the circuit board can be avoided.

Description

Technical Field

[0001] This invention belongs to the technical field of circuit board processing and manufacturing, and relates to a screen printing device for circuit board manufacturing. Background Technology

[0002] Circuit boards (PCBs) are an indispensable basic component in electronic devices. They are made of one or more layers of copper-clad laminate through processes such as etching, drilling, and plating. They are used to fix and support various electronic components and to achieve electrical connections between components through pre-defined conductive paths (i.e., circuits). The design and manufacturing technology of PCBs directly affects the performance, reliability, and cost of electronic products. During the manufacturing process of PCBs, silkscreen printing is required.

[0003] Currently, when screen printing circuit boards, there are those requiring single-sided screen printing and those requiring double-sided screen printing. Therefore, single-sided printing only requires one printing pass, while double-sided printing requires flipping the circuit board for a second printing pass after one side is printed. During the second printing pass, the circuit board needs to be manually flipped after the first printing pass. If the ink on the circuit board is not completely dry when manually flipped, it may be scratched, causing processing defects. Also, if the ink is not dry after flipping and is placed directly on the platform, it may cause ink loss or scratches, affecting the processing of the circuit board. Summary of the Invention

[0004] In view of this, the present invention provides a screen printing apparatus for circuit board manufacturing.

[0005] The technical implementation of the present invention is as follows: a screen printing device for circuit board manufacturing, comprising a base frame, a mounting plate, a side frame, sliders, a guide frame, a lifting cylinder, a screen printing frame, a screen printing assembly, and a placement mechanism. The mounting plate is connected to the top of the base frame, and the side frame is mounted on the mounting plate. Two sliders are slidably connected to the side frame, and a guide frame is connected between the upper front parts of the two sliders. A lifting cylinder is mounted on the top of the mounting plate, and the telescopic rod of the lifting cylinder is connected to the guide frame. A screen printing frame is connected between the two sliders. The side frame is provided with a screen printing assembly for screen printing circuit boards, and the mounting plate is provided with a placement mechanism for placing circuit boards and flipping them.

[0006] In a preferred embodiment of the present invention, the screen printing assembly includes a reciprocating lead screw, a geared motor, a mounting bracket, and a screen printing machine. The reciprocating lead screw is rotatably connected to the side frame, and the geared motor is mounted on the side of the side frame. The output shaft of the geared motor is connected to the reciprocating lead screw. The mounting bracket is slidably connected to the side frame, and the screen printing machine is mounted on the mounting bracket. The screen printing machine is located above the screen printing frame, and the reciprocating lead screw is threadedly engaged with the mounting bracket.

[0007] In a preferred embodiment of the present invention, the placement mechanism includes a guide frame, a drive motor, a clamping frame, a limiting block, an elastic element, and an inclined block. The guide frame is connected to the mounting plate, and drive motors are mounted on both sides of the mounting plate. A clamping frame is connected between the output shafts of the two drive motors. The clamping frame is U-shaped and is located inside the guide frame and can rotate inside the guide frame. Two limiting blocks are slidably connected to both sides of the clamping frame. Two elastic elements are connected between the limiting blocks and the clamping frame. An inclined block is provided on the side of the limiting blocks that are far apart from each other. The inner edge of the mounting plate is located at the movement trajectory of the inclined block.

[0008] In a preferred embodiment of the present invention, a support mechanism is further included. The support mechanism includes a support frame, an electric push rod, a push frame, and a push block. The support frame is rotatably connected to both sides of the bottom of the mounting plate. The push block is connected to the support frame. The electric push rod is installed on both sides of the bottom of the mounting plate. The push frame is connected to the telescopic rod of the electric push rod. The movement of the push frame can push the push block to flip.

[0009] In a preferred embodiment of the present invention, a collection mechanism is further included. The collection mechanism includes a guide rail, a sliding platform, a storage rack, and wedge blocks. The guide rail is connected to both sides of the base frame. The sliding platform is slidably connected to the bottom of the base frame. Multiple storage racks for storing circuit boards are evenly spaced on the top of the sliding platform. The storage racks are slidably connected to the guide rails. Wedge blocks are connected to both sides of the top of the storage racks.

[0010] In a preferred embodiment of the present invention, the distance between the rear side of the clamping frame and the output shaft of the drive motor is longer than the distance between the front side of the clamping frame and the output shaft of the drive motor. When the rear side of the clamping frame rotates, it will contact the wedge block and push the wedge block to move, while the front side of the clamping frame will not contact the wedge block when it rotates.

[0011] In a preferred embodiment of the present invention, a drying mechanism is further included, which includes an air outlet pipe, an air guide pipe and a blower. Two air outlet pipes are connected to both sides of the base frame, and an air guide pipe is connected between the four air outlet pipes. A blower is installed between the air guide pipes.

[0012] In a preferred embodiment of the present invention, the device further includes clamping cylinders and clamping plates. Two clamping cylinders are installed on both sides of the bottom of the screen printing frame, and clamping plates are connected to the telescopic rods of the clamping cylinders.

[0013] Compared with the prior art, the present invention has the following advantages: 1. After printing on one side of the circuit board, the present invention can control the drive motor to rotate to drive the clamping frame to rotate, thereby flipping the circuit board to achieve the effect of automatically flipping the circuit board. There is no need for manual flipping of the circuit board, which can avoid the situation of ink loss on the circuit board.

[0014] 2. After the circuit board is processed, the present invention can automatically unload the processed circuit board into a storage rack. The circuit board is stored in the storage rack, eliminating the need for manual unloading of the circuit board. This makes the operation more convenient and avoids the possibility of accidentally scratching the surface of the circuit board when unloading it manually. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the screen printing assembly and placement mechanism of the present invention.

[0017] Figure 3 This is a schematic diagram of the first structure of the placement mechanism of the present invention.

[0018] Figure 4 This is a schematic diagram of a second structure of the placement mechanism of the present invention.

[0019] Figure 5 This is a schematic diagram of the third structure of the placement mechanism of the present invention.

[0020] Figure 6 This is a schematic diagram of the first structure of the support mechanism of the present invention.

[0021] Figure 7 This is a schematic diagram of a second structure of the support mechanism of the present invention.

[0022] Figure 8 This is a schematic diagram of the first structure of the collecting mechanism of the present invention.

[0023] Figure 9 This is a schematic diagram of a second structure of the collecting mechanism of the present invention.

[0024] Figure 10 For the present invention Figure 9 Enlarged view of part A in the image.

[0025] Figure 11 This is a schematic diagram of the air-drying mechanism of the present invention.

[0026] Figure 12 This is a schematic diagram of the structure of the clamping cylinder, clamping plate, and screen printing frame of the present invention.

[0027] The above-mentioned attached drawings include the following reference numerals: 1. Base frame, 2. Mounting plate, 3. Side frame, 4. Slider, 41. Lifting cylinder, 5. Screen printing frame, 61. Guide frame, 62. Reciprocating lead screw, 63. Gear motor, 64. Mounting frame, 65. Screen printing machine, 71. Guide frame, 72. Drive motor, 73. Clamping frame, 74. Limiting block, 75. Elastic element 1, 76. Inclined block, 81. Support frame, 82. Electric push rod, 83. Pushing frame, 84. Push block, 91. Guide rail, 92. Sliding platform, 93. Storage rack, 94. Wedge block, 100. Circuit board, 101. Air outlet pipe, 102. Air guide pipe, 103. Air blower, 111. Clamping cylinder, 112. Clamping plate. Detailed Implementation

[0028] Although the invention may be described with respect to specific applications or industries, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0029] A screen printing device for circuit board manufacturing, such as Figures 1-5 As shown, the circuit board includes a base frame 1, a mounting plate 2, a side frame 3, sliders 4, a guide frame 61, a lifting cylinder 41, a screen printing frame 5, a screen printing assembly, and a placement mechanism. The mounting plate 2 is connected to the top of the base frame 1. The side frame 3 is mounted on the rear side of the mounting plate 2. Two sliders 4 are slidably connected to the front side of the side frame 3. The guide frame 61 is connected between the upper front sides of the two sliders 4. The lifting cylinder 41 is mounted on the rear top of the mounting plate 2. The telescopic rod of the lifting cylinder 41 is connected to the guide frame 61. The screen printing frame 5 is connected between the lower front sides of the two sliders 4. The side frame 3 is equipped with a screen printing assembly for screen printing the circuit board. The mounting plate 2 is equipped with a placement mechanism for placing the circuit board and flipping it over.

[0030] like Figure 2As shown, the screen printing assembly includes a reciprocating lead screw 62, a geared motor 63, a mounting bracket 64, and a screen printing machine 65. The reciprocating lead screw 62 is rotatably connected to the side frame 3, and the geared motor 63 is mounted on the side of the side frame 3. The output shaft of the geared motor 63 is connected to the reciprocating lead screw 62 so that the geared motor 63 can drive the reciprocating lead screw 62 to rotate. The mounting bracket 64 is slidably connected to the side frame 3, and the screen printing machine 65 is mounted on the mounting bracket 64. The screen printing machine 65 is located on the upper part of the screen printing frame 5. The reciprocating lead screw 62 is threadedly engaged with the mounting bracket 64 so that when the reciprocating lead screw 62 rotates, it can drive the mounting bracket 64 to move left and right through the thread, thereby driving the screen printing machine 65 to operate and cooperate with the screen printing frame 5 to perform screen printing on the circuit board.

[0031] like Figures 3-5 As shown, the placement mechanism includes a guide frame 71, a drive motor 72, a clamping frame 73, a limiting block 74, an elastic element 75, and a wedge 76. The guide frame 71 is connected to the mounting plate 2. Drive motors 72 are mounted on both the left and right sides of the mounting plate 2. A clamping frame 73 is connected between the output shafts of the two drive motors 72. The clamping frame 73 is U-shaped and is located inside the guide frame 71, allowing it to rotate within the guide frame 71. Two upper and lower limiting blocks 74 are slidably connected to both the left and right sides of the clamping frame 73. The circuit board can be placed... The circuit board is positioned between the upper parts of two limiting blocks 74 within the clamping frame 73. The clamping frame 73 is limited by the two limiting blocks 74. Two elastic elements 75, which are return springs, are connected between the limiting blocks 74 and the clamping frame 73. An inclined block 76 is provided on the side of the limiting blocks 74 that is far apart from each other. The inner edge of the mounting plate 2 is located at the movement trajectory of the inclined block 76, so that when the inclined block 76 moves to contact the mounting plate 2, it will be squeezed by the mounting plate 2, causing the limiting blocks 74 to move and limit the circuit board.

[0032] When screen printing is required on a circuit board, this screen printing device can be used. First, place the circuit board between two clamping frames 73. The lower limiting block 74 supports the circuit board, thus limiting its position. Then, control the telescopic rod of the lifting cylinder 41 to retract, causing the guide frame 61 to move downwards. As the guide frame 61 moves downwards, it moves the slider 4, the screen printing frame 5, and the screen printing machine 65 together. Once the screen printing frame 5 covers the circuit board, control the reduction motor 63 to drive the reciprocating screw 62 to rotate, thereby moving the mounting frame 64 via the thread. The moving mounting frame 64 moves the screen printing machine 65, scraping the screen printing frame 5 to screen print the circuit board. After processing, control the telescopic rod of the lifting cylinder 41 to extend, causing the guide frame 61 to move upwards. Then, control the drive motor 72 to move the clamping frame 65 upwards. The holder 73 rotates 180 degrees. When the holder 73 rotates, it can drive the limiting block 74 to move together. When the limiting block 74 moves, it can drive the inclined block 76 to rotate. When the inclined block 76 rotates, it can contact the mounting plate 2. The mounting plate 2 squeezes the inclined surface of the inclined block 76, causing the limiting block 74 to extend. The elastic element 75 is stretched, thereby limiting the circuit board. After the flip is completed, the inclined block 76 on the upper limiting block 74 disengages from the mounting plate 2. Under the action of the elastic element 75, the limiting block 74 resets and no longer blocks the circuit board. At this time, the telescopic rod of the lifting cylinder 41 can be controlled to retract, driving the screen printing frame 5 and the screen printing machine 65 to move down to screen print the circuit board. In this way, the circuit board can be screen printed using this device. During the process, the circuit board can be automatically flipped 180 degrees, making the operation more convenient and efficient.

[0033] like Figure 6 and Figure 7 As shown, it also includes a support mechanism, which includes a support frame 81, an electric push rod 82, a push frame 83, and a push block 84. The support frame 81 is rotatably connected to both the front and rear sides of the bottom of the mounting plate 2. The rotation of the support frame 81 can support the circuit board, thereby lifting the circuit board. The push block 84 is connected to the support frame 81. The electric push rod 82 is installed in the middle of both the front and rear sides of the bottom of the mounting plate 2. The push frame 83 is connected to the telescopic rod of the electric push rod 82. The movement of the push frame 83 can push the push block 84 to flip, thereby driving the support frame 81 to rotate, so as to lift the circuit board.

[0034] After the circuit board is placed, the electric push rod 82 can be extended to drive the push frame 83 to move. When the push frame 83 moves, it can push the push block 84 to move. When the push block 84 moves, it can drive the support frame 81 to swing. The support frame 81 supports the circuit board and ensures the stability during the screen printing process.

[0035] like Figures 8-10As shown, it also includes a collection mechanism, which includes a guide rail 91, a sliding platform 92, a storage rack 93, and a wedge block 94. The guide rail 91 is connected to both the left and right sides of the base frame 1. The sliding platform 92 is slidably connected to the bottom of the base frame 1. Multiple storage racks 93 for storing circuit boards are evenly spaced on the top of the sliding platform 92. The storage racks 93 are slidably connected to the guide rails 91. Wedge blocks 94 are connected to both the left and right sides of the top of the storage racks 93. The distance between the rear side of the clamping frame 73 and the output shaft of the drive motor 72 is longer than the distance between the front side of the clamping frame 73 and the output shaft of the drive motor 72. When the rear side of the clamping frame 73 rotates, it will contact the wedge block 94 and push the wedge block 94 to move. When the front side of the clamping frame 73 rotates, it will not contact the wedge block 94. That is, the clamping frame 73 can contact the wedge block 94 once and push the wedge block 94 to move once for one rotation.

[0036] After the circuit board is screen-printed, the drive motor 72 can be controlled to rotate the clamping frame 73 by 90 degrees, so that the opening of the clamping frame 73 faces downward. At this time, the circuit board will fall into the storage rack 93, thus realizing the storage of the circuit board. When the clamping frame 73 flips, when the clamping frame 73 rotates to contact the wedge block 94, the clamping frame 73 continues to rotate, which can push the wedge block 94 forward, thereby moving another storage rack 93 below the clamping frame 73, so as to achieve the effect of automatically adjusting the position of the storage rack 93. In this way, the circuit board can be automatically stored after the screen printing is completed, making the operation more convenient.

[0037] like Figure 11 As shown, it also includes a drying mechanism, which includes an air outlet pipe 101, an air guide pipe 102, and a blower 103. The base frame 1 has two upper and two lower air outlet pipes 101 connected to the left and right sides, and the four air outlet pipes 101 are connected to the rear sides by an air guide pipe 102. The blower 103 is installed between the air guide pipes 102. The operation of the blower 103 allows gas to enter the air outlet pipe 101 through the air guide pipe 102, and then blow the air out through the air outlet pipe 101 to blow the air onto the circuit board to assist in the drying process of the circuit board.

[0038] like Figure 12As shown, it also includes clamping cylinders 111 and clamping plates 112. Two clamping cylinders 111 are installed on the front and rear sides of the bottom of the screen printing frame 5. The clamping plates 112 are connected to the telescopic rods of the clamping cylinders 111. The operation of the clamping cylinders 111 can drive the clamping plates 112 to press against the front and rear sides of the circuit board. When pressing, since the clamping plates 112 on the front and rear sides move synchronously, if the position of the circuit board is offset, the clamping plates 112 can push the circuit board to move, thereby positioning the circuit board. After the clamping plates 112 on both sides are in contact with the circuit board, the circuit board can be clamped to prevent the position of the circuit board from shifting during the screen printing process, which would affect the entire screen printing operation.

[0039] Although this disclosure has been described with respect to only a limited number of embodiments, those skilled in the art who benefit from this disclosure will understand that various other embodiments can be devised without departing from the scope of the invention. Therefore, the scope of the invention should be limited only by the appended claims.

Claims

1. A screen printing device for circuit board manufacturing, characterized in that, The device includes a base frame (1), a mounting plate (2), a side frame (3), a slider (4), a guide frame (61), a lifting cylinder (41), a screen printing frame (5), a screen printing assembly, and a placement mechanism. The base frame (1) is connected to the top of the mounting plate (2), the side frame (3) is mounted on the mounting plate (2), two sliders (4) are slidably connected on the side frame (3), the guide frame (61) is connected between the upper front sides of the two sliders (4), the lifting cylinder (41) is mounted on the top of the mounting plate (2), the telescopic rod of the lifting cylinder (41) is connected to the guide frame (61), the screen printing frame (5) is connected between the two sliders (4), the side frame (3) is provided with a screen printing assembly for screen printing the circuit board, and the mounting plate (2) is provided with a placement mechanism for placing the circuit board and flipping the circuit board. The placement mechanism includes a guide frame (71), a drive motor (72), a clamping frame (73), a limiting block (74), an elastic element (75), and an inclined block (76). The guide frame (71) is connected to the mounting plate (2). The drive motors (72) are installed on both sides of the mounting plate (2). The clamping frame (73) is connected between the output shafts of the two drive motors (72). The clamping frame (73) is U-shaped. The clamping frame (73) is located inside the guide frame (71) and can rotate inside the guide frame (71). Two limiting blocks (74) are slidably connected on both sides of the clamping frame (73). Two elastic elements (75) are connected between the limiting blocks (74) and the clamping frame (73). An inclined block (76) is provided on the side of the limiting blocks (74) that are far apart from each other. The inner edge of the mounting plate (2) is located at the movement trajectory of the inclined block (76). It also includes a support mechanism, which includes a support frame (81), an electric push rod (82), a push frame (83), and a push block (84). The support frame (81) is rotatably connected to both sides of the bottom of the mounting plate (2). The push block (84) is connected to the support frame (81). The electric push rod (82) is installed on both sides of the bottom of the mounting plate (2). The push frame (83) is connected to the telescopic rod of the electric push rod (82). The push frame (83) can move to push the push block (84) to flip. It also includes a collection mechanism, which includes a guide rail (91), a sliding platform (92), a storage rack (93) and a wedge block (94). The base frame (1) is connected to both sides of the guide rail (91), the bottom of the base frame (1) is slidably connected to the sliding platform (92), and the top of the sliding platform (92) is evenly spaced with multiple storage racks (93) for storing circuit boards. The storage racks (93) are slidably connected to the guide rail (91), and the top of the storage racks (93) is connected to both sides of the top of the storage racks (93). The distance between the rear side of the clamping frame (73) and the output shaft of the drive motor (72) is longer than the distance between the front side of the clamping frame (73) and the output shaft of the drive motor (72). When the rear side of the clamping frame (73) rotates, it will contact the wedge block (94) and push the wedge block (94) to move. When the front side of the clamping frame (73) rotates, it will not contact the wedge block (94).

2. The screen printing apparatus for circuit board manufacturing according to claim 1, characterized in that, The screen printing assembly includes a reciprocating lead screw (62), a geared motor (63), a mounting bracket (64), and a screen printing machine (65). The reciprocating lead screw (62) is rotatably connected to the side frame (3). The geared motor (63) is mounted on the side of the side frame (3). The output shaft of the geared motor (63) is connected to the reciprocating lead screw (62). The mounting bracket (64) is slidably connected to the side frame (3). The screen printing machine (65) is mounted on the mounting bracket (64). The screen printing machine (65) is located on the upper part of the screen printing frame (5). The reciprocating lead screw (62) is threadedly engaged with the mounting bracket (64).

3. A screen printing apparatus for circuit board manufacturing according to claim 1, characterized in that, It also includes a drying mechanism, which includes an air outlet pipe (101), an air guide pipe (102) and an air blower (103). Two air outlet pipes (101) are connected to both sides of the base frame (1), and the four air outlet pipes (101) are connected by an air guide pipe (102). An air blower (103) is installed between the air guide pipes (102).

4. A screen printing apparatus for circuit board manufacturing according to claim 1, characterized in that, It also includes a clamping cylinder (111) and a clamping plate (112). Two clamping cylinders (111) are installed on both sides of the bottom of the screen printing frame (5). The clamping plate (112) is connected to the telescopic rod of the clamping cylinder (111).

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