Screen printing device for circuit board manufacturing

Abstract

The invention belongs to the technical field of circuit board processing and manufacturing, and relates to a screen printing device for circuit board manufacturing, which comprises a bottom frame, a mounting plate, a side frame, two sliding blocks, a guide frame, a lifting cylinder, a screen printing screen frame and a screen printing assembly, the top of the bottom frame is connected with the mounting plate, the side frame is mounted on the mounting plate, the side frame is slidably connected with the two sliding blocks, and the guide frame is connected with the lifting cylinder. A guide frame is connected between the two sliding blocks, a lifting air cylinder is installed on the top of the installation plate, a telescopic rod of the lifting air cylinder is connected with the guide frame, a silk screen frame is connected between the two sliding blocks, and a silk screen assembly used for conducting silk screen on the circuit board is arranged on the side frame. After one side of the circuit board is printed, the driving motor can be controlled to rotate to drive the clamping frame to rotate, so that the circuit board is overturned, the effect of automatically overturning the circuit board is achieved, manual overturning of the circuit board is not needed, and the situation that ink on the circuit board is lost can be avoided.

Description

Technical Field

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

[0002] Circuit board is one of the indispensable basic components in electronic equipment. It is made of one or more layers of copper-clad boards through etching, drilling, plating and other processes. It is used to fix and support various electronic components and realize electrical connection between components through preset conductive paths (i.e. circuits). The design and manufacturing technology of circuit boards are directly related to the performance, reliability and cost of electronic products. In the process of manufacturing circuit boards, the circuit boards need to be screen printed.

[0003] At present, when screen printing is performed on circuit boards, there are circuit boards that need to be screen printed on one side and circuit boards that need to be screen printed on both sides. Therefore, when printing, only one printing is required for single-sided printing, while for circuit boards that need to be printed on both sides, the circuit boards need to be turned over for a second printing after one side is printed. When performing the second printing, it is necessary to manually turn the circuit boards over for a second printing after the first printing is completed. If the ink on the circuit boards is not completely dry after manual turning, it may be scratched to cause processing defects. At the same time, if the ink is not dry after turning over and is placed directly on the platform, it may also cause ink loss or scratches, affecting the processing of the circuit boards. Summary of the invention

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

[0005] The technical implementation scheme of the present invention is: a silk screen printing device for circuit board manufacturing, including a base frame, a mounting plate, a side frame, a slider, a guide frame, a lifting cylinder, a silk screen frame, a silk screen assembly and a placement mechanism, the top of the base frame is connected to the mounting plate, the mounting plate is installed with a side frame, the side frame is slidably connected to two sliders, a guide frame is connected between the two sliders, a lifting cylinder is installed on the top of the mounting plate, the telescopic rod of the lifting cylinder is connected to the guide frame, a silk screen frame is connected between the two sliders, the side frame is provided with a silk screen assembly for silk screen printing on the circuit board, and the mounting plate is provided with a placement mechanism for placing and flipping the circuit board.

[0006] In a preferred embodiment of the present invention, the screen printing assembly includes a reciprocating screw, a reduction motor, a mounting frame and a screen printing machine, the reciprocating screw is rotatably connected to the side frame, the reduction motor is installed on the side of the side frame, the output shaft of the reduction motor is connected to the reciprocating screw, the side frame is slidably connected to the mounting frame, the screen printing machine is installed on the mounting frame, the screen printing machine is located on the upper part of the screen printing frame, and the reciprocating screw is threadedly matched with the mounting frame.

[0007] In a preferred embodiment of the present invention, the placement mechanism includes a guide frame, a drive motor, a clamping frame, a limit block, an elastic member and an inclined block, the guide frame is connected to the mounting plate, drive motors are installed 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 located inside the guide frame and can rotate inside the guide frame, two limit blocks are slidably connected on both sides of the clamping frame, two elastic members are connected between the limit blocks and the clamping frame, inclined blocks are provided on the sides of the limit blocks on both sides that are away from each other, and the inner edge position of the mounting plate is located at the moving track of the inclined block.

[0008] In a preferred embodiment of the present invention, it also includes a supporting mechanism, which includes a supporting frame, an electric push rod, a pushing frame and a pushing block. The bottom of the mounting plate is rotatably connected to the supporting frame on both sides, and the pushing block is connected to the supporting frame. The bottom of the mounting plate is installed with electric push rods on both sides, and the telescopic rod of the electric push rod is connected to the pushing frame. The movement of the pushing frame can push the pushing block to flip.

[0009] In a preferred embodiment of the present invention, a collecting mechanism is also included, and the collecting mechanism includes guide rails, a sliding platform, a storage rack and a wedge block. The two sides of the base frame are connected to the guide rails, the bottom of the base frame is slidably connected to the sliding platform, and the top of the sliding platform is evenly spaced and connected to a plurality of storage racks for storing circuit boards. The storage racks are slidably connected to the guide rails, and the two sides of the top of the storage rack are connected to wedge blocks.

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

[0011] In a preferred embodiment of the present invention, it also includes a drying mechanism, which includes an air outlet pipe, an air guide pipe and an air blowing fan. Two air outlet pipes are connected to both sides of the base frame, and the four air outlet pipes are connected by air guide pipes. Air blowing fans are installed between the air guide pipes.

[0012] In a preferred embodiment of the present invention, it also includes a clamping cylinder and a clamping plate. Two clamping cylinders are installed on both sides of the bottom of the screen printing frame, and the 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 rotation of the drive motor to drive the clamping frame to rotate, thereby flipping the circuit board to achieve the effect of automatically flipping the circuit board, without the need for manual flipping of the circuit board, and can avoid the occurrence 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 by the storage rack, and there is no need to manually unload the circuit board for storage. The operation is more convenient and can also avoid the situation where the surface of the circuit board is scratched due to misoperation when the circuit board is manually unloaded. 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 structural schematic diagram of the screen printing assembly and the 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 second structural schematic diagram of the placement mechanism of the present invention.

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

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

[0021] Figure 7 It is a schematic diagram of the 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] Fig. 9 This is a second structural schematic diagram of the collecting mechanism of the present invention.

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

[0025] Fig.11 It is a structural schematic diagram of the air-drying mechanism of the present invention.

[0026] Fig.12 It is a schematic structural diagram of the clamping cylinder, the clamping plate and the screen printing frame of the present invention.

[0027] Among them, the above-mentioned drawings include the following figure marks: 1. base frame, 2. mounting plate, 3. side frame, 4. slider, 41. lifting cylinder, 5. silk screen frame, 61. guide frame, 62. reciprocating screw, 63. reduction motor, 64. mounting frame, 65. silk screen machine, 71. guide frame, 72. driving motor, 73. clamping frame, 74. limit block, 75. elastic member 1, 76. inclined block, 81. supporting frame, 82. electric push rod, 83. pushing frame, 84. pushing block, 91. guide rail, 92. sliding platform, 93. storage rack, 94. wedge block, 101. air outlet pipe, 102. air guide pipe, 103. air blowing fan, 111. clamping cylinder, 112. clamping plate. DETAILED DESCRIPTION

[0028] Although the present invention may be described with respect to a particular application or industry, those skilled in the art will recognize the broader applicability of the present invention. Those of ordinary skill in the art will recognize that terms such as above, below, upward, downward, etc. are used to describe the drawings and do not represent limitations on the scope of the present invention as defined by the appended claims. Any numerical designations such as first or second are merely exemplary and are not intended to limit the scope of the present invention in any way.

[0029] A screen printing device for circuit board manufacturing, such as Figure 1-Figure 5 As shown, it 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 silk-screen mesh frame 5, a silk-screen component and a placement mechanism, the top of the base frame 1 is connected to the mounting plate 2, the rear side of the mounting plate 2 is installed with a side frame 3, the front side of the side frame 3 is slidably connected to two sliders 4, the upper front parts of the two sliders 4 are connected with a guide frame 61, the rear side of the top of the mounting plate 2 is installed with a lifting cylinder 41, the telescopic rod of the lifting cylinder 41 is connected to the guide frame 61, the lower front parts of the two sliders 4 are connected with a silk-screen mesh frame 5, the side frame 3 is provided with a silk-screen component for silk-screening a circuit board, and the mounting plate 2 is provided with a placement mechanism for placing and flipping the circuit board.

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

[0031] like Figure 3-Figure 5 As shown, the placement mechanism includes a guide frame 71, a drive motor 72, a clamping frame 73, a limit block 74, an elastic member 75 and an inclined block 76. The guide frame 71 is connected to the mounting plate 2. The drive motors 72 are installed on the left and right 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 located inside the guide frame 71 and can rotate inside the guide frame 71. The left and right sides of the clamping frame 73 are slidably connected with upper and lower limit blocks 74. The circuit board can be placed in the clamping frame 73. The circuit board is located between the upper parts of the two limit blocks 74, and the clamping frame 73 is limited by the two limit blocks 74. Two elastic members 75 are connected between the limit blocks 74 and the clamping frame 73. The elastic member 75 is a return spring. The limit blocks 74 on both sides are provided with inclined blocks 76 on the sides away from each other. The inner edge position of the mounting plate 2 is located at the moving track of the inclined blocks 76, so that the inclined blocks 76 will be squeezed by the mounting plate 2 when they move to contact with the mounting plate 2, so that the limit blocks 74 move to limit the circuit board.

[0032] When it is necessary to perform silk-screen processing on the circuit board, the silk-screen printing device can be used. When using it, the circuit board is first placed between the two clamping frames 73, and the circuit board is supported by the limit block 74 below, so as to limit the circuit board, and then the telescopic rod of the lifting cylinder 41 is controlled to retract to drive the guide frame 61 to move downward. When the guide frame 61 moves downward, it can drive the slider 4, the silk-screen frame 5 and the silk-screen printer 65 to move downward together. When the silk-screen frame 5 moves down to cover the circuit board, the reduction motor 63 can be controlled to drive the reciprocating screw rod 62 to rotate, thereby driving the mounting frame 64 to move through the thread. When the mounting frame 64 moves, it can drive the silk-screen printer 65 to move and scrape on the silk-screen frame 5, so as to perform silk-screen processing on the circuit board. After the processing is completed, the telescopic rod of the lifting cylinder 41 can be controlled to extend to drive the guide frame 61 to move upward, and then the drive motor 72 can be controlled to drive the clamping The support frame 73 rotates 180 degrees, and the clamping frame 73 can drive the limit block 74 to move together when rotating. The limit block 74 can drive the inclined block 76 to rotate when moving. The inclined block 76 can contact the mounting plate 2 when rotating, and the mounting plate 2 squeezes the inclined surface of the inclined block 76, so that the limit block 74 extends and the elastic member 75 is stretched, thereby limiting the circuit board. After the flipping is completed, the inclined block 76 on the upper limit block 74 is disengaged from the mounting plate 2. Under the action of the elastic member 75, the limit block 74 is reset and no longer blocks the circuit board. At this time, the telescopic rod of the lifting cylinder 41 can be controlled to retract again to drive the screen printing frame 5 and the screen printing machine 65 to move downward, and the circuit board can be screen-printed. In this way, the present device can be used to perform screen printing on the circuit board. During the processing, the circuit board can be automatically flipped 180 degrees, which is more convenient and efficient to operate.

[0033] like Figure 7 and Figure 8 As shown, a supporting mechanism is also included, and the supporting mechanism includes a supporting frame 81, an electric push rod 82, a pushing frame 83 and a pushing block 84. The front and rear sides of the bottom of the mounting plate 2 are rotatably connected to the supporting frame 81. The rotation of the supporting frame 81 can hold the circuit board, thereby lifting the circuit board. The pushing block 84 is connected to the supporting frame 81. The middle of the front and rear sides of the bottom of the mounting plate 2 is installed with an electric push rod 82. The telescopic rod of the electric push rod 82 is connected to the pushing frame 83. The movement of the pushing frame 83 can push the pushing block 84 to flip, thereby driving the pushing frame 83 to rotate to lift the circuit board.

[0034] After the circuit board is placed, the electric push rod 82 can be controlled to extend the telescopic rod to drive the pushing frame 83 to move. When the pushing frame 83 moves, it can push the pushing block 84 to move. When the pushing block 84 moves, it can drive the supporting frame 81 to swing. The circuit board is supported by the supporting frame 81 to ensure stability during the silk-screen printing process.

[0035] like Figure 8-Figure 10As shown, a collecting mechanism is also included, which includes a guide rail 91, a sliding platform 92, a storage rack 93 and a wedge block 94. The left and right sides of the base frame 1 are connected with guide rails 91, the bottom of the base frame 1 is slidably connected with a sliding platform 92, and the top of the sliding platform 92 is evenly spaced and connected with a plurality of storage racks 93 for storing circuit boards. The storage racks 93 are slidably connected to the guide rails 91, and the left and right sides of the top of the storage racks 93 are connected with wedge blocks 94. The distance between the output shaft of the driving motor 72 on the rear side of the clamping frame 73 is longer than the distance between the front side of the clamping frame 73 and the output shaft of the driving motor 72. When the rear side of the clamping frame 73 rotates, it will contact with 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 with the wedge block 94, that is, the clamping frame 73 can contact with the wedge block 94 once and push the wedge block 94 to move after rotating one circle.

[0036] After the screen printing of the circuit board is completed, the driving motor 72 can be controlled to drive the clamping frame 73 to rotate another ninety 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, thereby realizing the storage of the circuit board. When the clamping frame 73 is flipped, when the clamping frame 73 rotates to contact the wedge block 94, the clamping frame 73 continues to rotate and can push the wedge block 94 forward, so that another storage rack 93 moves to the bottom of 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 of the circuit board is completed, which is more convenient to operate.

[0037] like Fig.11 As shown, it also includes a drying mechanism, which includes an air outlet pipe 101, an air guide pipe 102 and an air blowing fan 103. The upper and lower air outlet pipes 101 are connected to the left and right sides of the base frame 1. The air guide pipes 102 are connected between the rear sides of the four air outlet pipes 101. The air guide pipes 102 are installed between the air guide pipes 102. The air blowing fan 103 can operate to allow gas to enter the air outlet pipe 101 through the air guide pipe 102, thereby blowing air out through the air outlet pipe 101 to blow the air onto the circuit board, thereby assisting in air-drying the circuit board.

[0038] like Fig.12As shown, it also includes a clamping cylinder 111 and a clamping plate 112. Two clamping cylinders 111 are installed on the front and rear sides of the bottom of the silk screen 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, and after the clamping plates 112 on both sides are in contact with the circuit board, the circuit board can be clamped to avoid the position of the circuit board being offset during the silk screen printing process, which affects the progress of the entire silk screen printing work.

[0039] 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 screen printing device for manufacturing a circuit board, characterized in that: The invention comprises 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 top of the base frame (1) is connected to a mounting plate (2), a side frame (3) is installed on the mounting plate (2), two sliders (4) are slidably connected to the side frame (3), a guide frame (61) is connected between the two sliders (4), a lifting cylinder (41) is installed on the top of the mounting plate (2), a telescopic rod of the lifting cylinder (41) is connected to the guide frame (61), a screen printing frame (5) is connected between the two sliders (4), a screen printing assembly for screen printing a circuit board is provided on the side frame (3), and a placement mechanism for placing a circuit board and flipping the circuit board is provided on the mounting plate (2).

2. A screen printing device for manufacturing a circuit board according to claim 1, characterized in that: The screen printing assembly comprises a reciprocating screw rod (62), a reduction motor (63), a mounting frame (64) and a screen printing machine (65); the reciprocating screw rod (62) is rotatably connected to the side frame (3); the reduction motor (63) is mounted on the side of the side frame (3); the output shaft of the reduction motor (63) is connected to the reciprocating screw rod (62); the mounting frame (64) is slidably connected to the side frame (3); the screen printing machine (65) is mounted on the mounting frame (64); the screen printing machine (65) is located on the upper part of the screen printing frame (5); the reciprocating screw rod (62) and the mounting frame (64) are threadedly matched.

3. A screen printing device for manufacturing a circuit board according to claim 1, characterized in that: The placement mechanism comprises a guide frame (71), a drive motor (72), a clamping frame (73), a limit block (74), an elastic member (75) and an inclined block (76); the guide frame (71) is connected to the mounting plate (2); drive motors (72) are mounted on both 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 located inside the guide frame (71) and can rotate inside the guide frame (71); two limit blocks (74) are slidably connected to both sides of the clamping frame (73); two elastic members (75) are connected between the limit blocks (74) and the clamping frame (73); inclined blocks (76) are arranged on the sides of the limit blocks (74) that are away from each other; the inner edge of the mounting plate (2) is located at the moving track of the inclined block (76).

4. A screen printing device for manufacturing a circuit board according to claim 1, characterized in that: The invention also comprises a supporting mechanism, wherein the supporting mechanism comprises a supporting frame (81), an electric push rod (82), a pushing frame (83) and a pushing block (84); both sides of the bottom of the mounting plate (2) are rotatably connected to the supporting frame (81); the pushing block (84) is connected to the supporting frame (81); both sides of the bottom of the mounting plate (2) are installed with electric push rods (82); the telescopic rod of the electric push rod (82) is connected to the pushing frame (83); the pushing frame (83) can push the pushing block (84) to flip when it moves.

5. A screen printing device for manufacturing a circuit board according to claim 3, characterized in that: The invention also comprises a collecting mechanism, the collecting mechanism comprising a guide rail (91), a sliding platform (92), a storage rack (93) and a wedge block (94), both sides of the base frame (1) are connected to the guide rails (91), the bottom of the base frame (1) is slidably connected to the sliding platform (92), the top of the sliding platform (92) is evenly spacedly connected to a plurality of storage racks (93) for storing circuit boards, the storage racks (93) are slidably connected to the guide rails (91), and both sides of the top of the storage rack (93) are connected to wedge blocks (94).

6. A screen printing device for manufacturing a circuit board according to claim 5, characterized in that: The distance between the output shaft of the driving motor (72) on the rear side of the clamping frame (73) is longer than the distance between the front side of the clamping frame (73) and the output shaft of the driving 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, and when the front side of the clamping frame (73) rotates, it will not contact the wedge block (94).

7. A screen printing device for manufacturing a circuit board according to claim 1, characterized in that: The invention also comprises an air drying mechanism, wherein the air drying mechanism comprises an air outlet pipe (101), an air guide pipe (102) and an air blowing fan (103); two air outlet pipes (101) are connected to both sides of the base frame (1); the four air outlet pipes (101) are connected to the air guide pipes (102); and the air blowing fan (103) is installed between the air guide pipes (102).

8. A screen printing device for manufacturing a circuit board 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), and the clamping plate (112) is connected to the telescopic rod of the clamping cylinder (111).

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