Automatic silk-screen printing steering device for printed circuit board

Abstract

The utility model discloses a printed circuit board automatic screen printing steering device which comprises a conveying part, a rotating plate and a driving device, the conveying part comprises a plurality of rolling shafts, a plurality of idler wheels are fixedly arranged on each rolling shaft, a plurality of through holes are formed in the rotating plate, and the driving device can drive the rotating plate to move up and down and rotate in a horizontal plane. When the bottom of the rotating plate abuts against the rolling shaft, each through hole encloses the periphery of one rolling wheel, the highest point of the rolling wheel enclosed by the through holes extends out of the top of the rotating plate, and the rolling wheel can rotate. The circuit board conveying device is installed at the inlet end of the screen printing equipment, the rolling wheel on the rolling shaft can convey a circuit board to be subjected to screen printing to the screen printing equipment to be subjected to screen printing, the driving device drives the rotating plate to lift, rotate by 90 degrees and sink and reset, then the circuit board can be automatically steered, and it is ensured that the circuit board is conveyed into the screen printing equipment in a specific direction to be subjected to screen printing; the labor intensity of operators can be reduced, and the overall manufacturing efficiency of the circuit board can be improved.

Description

Technical Field

[0001] The utility model relates to the field of printed circuit board manufacturing, in particular to an automatic silk-screen steering device for a printed circuit board. Background Art

[0002] The silk screen printing process of printed circuit boards is an important part of the circuit board manufacturing process. Before silk screen printing, the circuit board surface needs to be processed, such as removing oxides and increasing the roughness of the board surface to improve the adhesion of the ink.

[0003] Many existing circuit board manufacturing production lines separate the surface treatment process and the screen printing process of the circuit board, and the production line operation is non-continuous. In this way, the circuit board with completed surface treatment needs to be transported to the conveyor line of the screen printing equipment. Since the screen printing direction of the circuit board is fixed, the circuit board needs to be sent to the screen printing equipment in a specific direction (such as the length direction) for screen printing each time. However, the direction in which the surface-treated circuit board to be screen-printed is placed on the transport cart is uncertain. Sometimes it is placed horizontally, and sometimes it is placed vertically. If the length of the circuit board is long, it needs to be placed horizontally to prevent it from falling during transportation. In this case, when the transport cart is pushed to the entrance of the conveyor line of the screen printing equipment, the placement direction of the circuit board is not completely consistent. If the circuit board on the transport cart is placed horizontally (due to its long length, it needs to be placed horizontally), the operator needs to flip the circuit board so that the circuit board to be screen-printed is sent to the conveyor line of the screen printing equipment in a specific direction (such as the length direction). Since a stack of circuit boards is usually placed on the transport cart, the overall weight is relatively large, and it is very difficult for the operator to flip it, the labor intensity is high, and it also affects the overall manufacturing efficiency of the circuit board.

[0004] In view of the above problems, it is necessary to research and design a conveyor line that can automatically rotate the circuit board to be screen-printed so that the circuit board can be fed into the screen-printing equipment in a specific direction. Utility Model Content

[0005] The utility model aims to provide an automatic silk-screen steering device for a printed circuit board to solve at least one of the above-mentioned technical problems.

[0006] According to one aspect of the utility model, there is provided a printed circuit board automatic screen printing steering device, comprising:

[0007] The conveying part includes a plurality of rollers, each of which is fixed with a plurality of rollers;

[0008] A rotating plate, on which a plurality of through holes are provided, and the rotating plate is located above the roller; and

[0009] The driving device is located below the roller and can drive the rotating plate to move up and down. The driving device can drive the rotating plate to rotate in a horizontal plane.

[0010] When the bottom of the rotating plate abuts against the roller, each through hole encloses the periphery of a roller, the highest point of the roller enclosed by the through hole protrudes from the top of the rotating plate and the roller can rotate.

[0011] The utility model discloses an automatic silk-screen steering device for printed circuit boards, which is installed at the entrance end of the silk-screen equipment. Under the rotation of the roller, the roller on the roller can convey the circuit board to be silk-screened to the silk-screen equipment for silk-screening. When the circuit board on the transport cart for conveying the circuit board is placed vertically, under the action of the driving device, when the bottom of the rotating plate abuts against the roller, each through hole on the rotating plate is enclosed on the periphery of a roller, and the highest point of the roller enclosed by the through hole extends from the top of the rotating plate. The enclosed roller can rotate normally to convey the circuit board. When the circuit board on the transport cart for conveying the circuit board is placed horizontally, when the horizontal circuit board is conveyed to the rotating plate, the driving device drives the rotating plate to move upward so that the height of the rotating plate is higher than the highest point of the roller. The rotating plate drives the circuit board thereon to rotate 90 degrees synchronously, and then the driving device drives the rotating plate to reset, and the circuit board is supported by the rollers again. Under the rotation of the rollers, the circuit board is sent to the screen printing equipment in a specific direction for screen printing. By driving the rotating plate to lift, rotate 90 degrees, and sink by the driving device, the circuit board whose placement direction does not meet the feeding direction requirements of the screen printing equipment can be automatically turned, ensuring that the circuit board to be screen-printed is sent to the screen printing equipment in a specific direction for screen printing. There is no need for operators to manually turn the circuit boards to be screen-printed on the transport cart, which can reduce the labor intensity of operators and improve the overall manufacturing efficiency of circuit boards.

[0012] Preferably, the driving device is a rotary telescopic cylinder.

[0013] Therefore, under the driving action of the rotating telescopic cylinder, the rotating plate can be lifted, rotated 90 degrees, and then sunk and reset, ensuring that the circuit boards to be screen-printed are fed into the screen printing equipment in a specific direction for screen printing.

[0014] Preferably, the end of the piston rod of the rotary telescopic cylinder passes through the gap between the two rollers and is fixed to the bottom of the rotating plate.

[0015] Therefore, in this case, the rotation and extension of the piston rod of the rotary and telescopic cylinder do not affect the normal rotation of the roller.

[0016] Preferably, the plurality of rollers are arranged in parallel and at equal intervals, the plurality of rollers on each roller are arranged at equal intervals, and the plurality of through holes on the rotating plate are arranged in a matrix.

[0017] Therefore, in this case, after the turn plate is lifted and rotated 90 degrees, when it needs to be reset, the turn plate can be directly moved downward to rest against the roller again, and each through hole on the turn plate is enclosed by the periphery of a roller, and the highest point of the roller enclosed by the through hole extends from the top of the turn plate, that is, the turn plate can be reset by directly moving downward after rotating 90 degrees, and there is no need to rotate the turn plate 90 degrees and then reset, which can improve the steering efficiency of the circuit board.

[0018] Preferably, the difference between the outer circle radius and the inner circle radius of the roller is greater than the thickness of the rotating plate.

[0019] Therefore, in this way, it can be ensured that when the bottom of the rotating plate abuts against the roller, the highest point of the roller surrounded by the through hole can extend from the top of the rotating plate without affecting the normal rotation of the roller surrounded by the through hole.

[0020] Preferably, the four corners of the rotating plate are chamfered.

[0021] Therefore, in this case, when the length of the roller is constant, the area of ​​the rotating plate can be maximized to prevent the rotating plate from hitting other components at its corner during rotation.

[0022] Preferably, it further comprises a bracket, the roller is arranged on the bracket, the roller can rotate on the bracket, the bracket is provided with a cross beam, and the driving device is arranged on the cross beam.

[0023] Therefore, the bracket can provide bearing for the roller and the driving device, so that they form a whole, which is convenient for overall movement.

[0024] Preferably, the radial cross section of the through hole is circular.

[0025] Therefore, the through hole with a circular radial cross section can ensure that the through hole directly sinks after the rotating plate rotates and can also be enclosed in the periphery of the roller without affecting the normal rotation of the roller.

[0026] Preferably, a motor is also included, and the motor drives the multiple rollers to rotate synchronously.

[0027] Therefore, multiple rollers can be driven by the motor to rotate synchronously to realize the transportation of the circuit board.

[0028] Preferably, it also includes a synchronous toothed belt, a first gear is provided on the rotating shaft of the motor, a second gear is provided at the end of the roller, the synchronous toothed belt is ringed on the first gear and the second gear, and the first gear drives each second gear to rotate through the synchronous toothed belt.

[0029] Therefore, when the rotating shaft of the motor rotates, the rotating shaft drives the first gear to rotate synchronously, and the first gear drives the synchronous belt to transmit synchronously. The synchronous belt can drive the second gear at the end of each roller to rotate synchronously to achieve synchronous rotation of multiple rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of an automatic silk-screen steering device for a printed circuit board according to one embodiment of the utility model;

[0031] Figure 2 for Figure 1 The schematic diagram of the structure of the automatic silk-screen steering device for printed circuit boards along direction A is shown;

[0032] Figure 3 for Figure 1 The schematic diagram of the structure of the transfer board of the automatic silk-screen steering device for printed circuit boards shown;

[0033] Figure 4 for Figure 2 The schematic diagram of the structure of the automatic silk-screen steering device for printed circuit boards along the B direction after hiding part of the bracket shown;

[0034] Figure 5 for Figure 2 The diagram shows the state of the transfer plate after being lifted in the automatic silk screen turning device for printed circuit boards. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0036] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first", "second" and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, unless otherwise specified, "multiple" means two or more; it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between the two elements.

[0037] Figures 1 to 5 The structure of an automatic silk-screen steering device for a printed circuit board according to an embodiment of the utility model is schematically shown.

[0038] See also Figures 1 to 5 The automatic silk-screen steering device for printed circuit boards includes a conveying part, a rotating plate 2, a driving device 3, a bracket, a motor 5 and a synchronous toothed belt 6.

[0039] The conveyor is used to convey the circuit board to be screen printed. Figure 1 and Figure 2 The conveying part includes a plurality of rollers 11, which are arranged in parallel and at equal intervals. A plurality of rollers 12 are fixed on each roller 11, and the rollers 12 rotate synchronously with the rollers 11. The plurality of rollers 12 on each roller 11 are arranged at equal intervals. Under the rotation of the rollers 11, the rollers 12 on the rollers 11 can convey the circuit board to be screen-printed to the screen printing equipment for screen printing. In this embodiment, the number of rollers 11 is eight, and the number of rollers 12 on each roller 11 is eight. Figure 1 The sixty-four rollers 12 on the eight rollers 11 are arranged in eight rows horizontally. In other embodiments, the number of rollers 11 and the number of rollers 12 on each roller 11 can be adjusted according to the conveying requirements.

[0040] The conveying part is installed on the bracket, specifically: Figure 1 and Figure 2 The bracket includes a left bracket 401 and a right bracket 402 arranged in parallel in the longitudinal direction. One end of each roller 11 is installed on the left bracket 401 through a bearing, and the other end of each roller 11 is also installed on the right bracket 402 through a bearing. The roller 11 can rotate between the left bracket 401 and the right bracket 402.

[0041] See also Figure 2 and Figure 5 A crossbeam 41 is installed on the bracket, one end of the crossbeam 41 is fixed on the left bracket 401, and the other end of the crossbeam 41 is fixed on the right bracket 402. The crossbeam 41 can not only ensure the overall stability of the left bracket 401 and the right bracket 402, but also provide bearing for the driving device 3.

[0042] See also Figure 2 and Figure 5 The driving device 3 is fixed on the crossbeam 41 and is located below the roller 11. Figure 1 and Figure 2 The rotating plate 2 is located above the roller 11, and the driving device 3 can drive the rotating plate 2 to move up and down. At the same time, the driving device 3 can also drive the rotating plate 2 to rotate in a horizontal plane.

[0043] See also Figure 1 and Figure 3 The rotating plate 2 is formed with a plurality of through holes 21, and the radial cross section of the through holes 21 is circular. When the bottom of the rotating plate 2 is against the roller 11 ( Figure 1 , Figure 2In the state shown in the figure, each through hole 21 on the rotating plate 2 can be respectively enclosed in the periphery of a roller 12, and the difference between the outer circle radius and the inner circle radius of the roller 2 is greater than the thickness of the rotating plate 2. In this way, when the bottom of the rotating plate 2 abuts against the roller 11, the highest point of the roller 12 enclosed by the through hole 21 can extend from the top of the rotating plate 2 and the roller 12 can rotate normally in the through hole 21, that is, when the bottom of the rotating plate 2 abuts against the roller 11, the rotating plate 2 does not affect the normal rotation of the roller 12 enclosed by the through hole 21, and the through hole 21 with a circular radial cross section can ensure that the rotating plate 2 directly sinks after rotation. The through hole 21 can also be enclosed in the periphery of the roller 12 and does not affect the normal rotation of the roller 12.

[0044] See also Figure 1 and Figure 3 The number of through holes 21 on the rotating plate 2 is thirty-two, and the thirty-two through holes 21 are arranged in a matrix. Since the multiple rollers 11 are arranged in parallel and at equal intervals, and the multiple rollers 12 on each roller 11 are also arranged at equal intervals, in this way, after the rotating plate 2 is lifted and rotated 90 degrees, when it needs to be reset, the rotating plate 2 can directly move downward to rest against the roller 11 again, and each through hole 21 on the rotating plate 2 is enclosed by the periphery of a roller 12, and the highest point of the roller 12 enclosed by the through hole 21 extends from the top of the rotating plate 2, that is, the rotating plate 2 can be reset by moving directly downward after rotating 90 degrees, and there is no need to rotate the rotating plate 2 90 degrees and then reset, which can improve the steering efficiency of the circuit board.

[0045] See also Figure 2 and Figure 5 In this embodiment, the driving device 3 is a rotating telescopic cylinder, and the end of the piston rod 31 of the rotating telescopic cylinder passes through the gap between the two rollers 11 and is fixed to the bottom of the rotating plate 2; the rotating telescopic cylinder can drive the rotating plate 2 to move upward so that the height of the rotating plate 2 is higher than the highest point of the roller 12 ( Figure 5 The rotating telescopic cylinder then drives the rotating plate 2 to rotate 90 degrees in the horizontal plane, and the rotating plate 2 can drive the circuit board thereon to rotate 90 degrees synchronously, and then the rotating telescopic cylinder drives the rotating plate 2 to move downward to complete the reset of the rotating plate 2 ( Figure 2 In the state shown in the figure, under the driving action of the rotating telescopic cylinder, the rotating plate 2 can be lifted - rotated 90 degrees - sunk and reset, and the working mode of the driving device 3 can be set in advance.

[0046] See also Figure 3The four corners of the rotating plate 2 are all chamfered. By cutting off an isosceles triangle from each of the four corners of a square rotating plate 2, a rotating plate 2 with four chamfered corners can be formed. This shape of the rotating plate 2 can maximize the area of ​​the rotating plate 2 when the length of the roller 11 is constant, so as to adapt to circuit boards with larger areas, perform steering operations on the circuit boards, and prevent the rotating plate 2 from hitting other components such as the left bracket 401 and the right bracket 402 at its corners during rotation.

[0047] See also Figure 2 The motor 5 is mounted on the right bracket 402, and the motor 5 can drive the roller 11 to rotate synchronously. Figure 4 A first gear 52 is fixed on the rotating shaft 51 of the motor 5, and a second gear 13 is fixed at the end of each roller 11. The synchronous toothed belt 6 is ringed on the first gear 52 and the eight second gears 13. The first gear 52 is meshed with the synchronous toothed belt 6, and the eight second gears 13 are all meshed with the synchronous toothed belt 6. In this way, the first gear 52 can drive each second gear 13 to rotate through the synchronous toothed belt 6. When the rotating shaft 51 of the motor 5 rotates, the rotating shaft 51 drives the first gear 52 to rotate synchronously, and the first gear 52 drives the synchronous toothed belt 6 for synchronous transmission. The synchronous toothed belt 6 can drive the second gear 13 at the end of each roller 11 to rotate synchronously, thereby realizing the synchronous rotation of the eight rollers 11.

[0048] The automatic screen printing steering device for printed circuit boards of the utility model is installed at the entrance end of the screen printing equipment. Under the driving action of the motor 5, the eight rollers 11 rotate synchronously, and the rollers 12 on the rollers 11 can transport the circuit boards to be screen printed to the screen printing equipment for screen printing; when the circuit boards on the transport cart for transporting the circuit boards are placed vertically, the driving device 3 does not work, that is, the bottom of the rotating plate 2 is against the rollers 11 ( Figure 2 The state shown in the figure), each through hole 21 on the rotating plate 2 is enclosed by the periphery of a roller 12, and the highest point of the roller 12 enclosed by the through hole 21 extends out from the top of the rotating plate 2. The enclosed roller 12 can rotate normally to convey the circuit board, and the circuit board to be screen-printed on the transport cart is sent to the screen printing equipment by the rollers 12 on the eight rollers 11 in a specific direction (such as the length direction) for screen printing. When the circuit board on the transport cart for transporting the circuit board is placed horizontally, the horizontal circuit board is transported to the rotating plate 2 by the roller 12 upstream of the rotating plate 2, and the driving device 3 drives the rotating plate 2 to move upward so that the height of the rotating plate 2 is higher than the highest point of the roller 12 ( Figure 5 The driving device 3 then drives the rotating plate 2 to rotate 90 degrees in the horizontal plane, and the rotating plate 2 drives the circuit board thereon to rotate 90 degrees synchronously, and then the driving device 3 drives the rotating plate 2 to sink and reset ( Figure 2The circuit board is supported by the roller 12 in the area where the rotating plate 2 is located again. Under the rotation of the roller 12, the circuit board is sent to the screen printing equipment by the roller 12 in a specific direction (such as the length direction) for screen printing. The driving device 3 drives the rotating plate 2 to lift, rotate 90 degrees, and sink to reset, so that the circuit board whose placement direction does not meet the feeding direction requirement of the screen printing equipment can be automatically turned, ensuring that the circuit board to be screen-printed is sent to the screen printing equipment in a specific direction for screen printing. There is no need for the operator to manually turn the circuit board to be screen-printed on the transport cart, which can reduce the labor intensity of the operators and improve the overall manufacturing efficiency of the circuit board. Moreover, the rotating plate 2 can be reset by moving directly downward after rotating 90 degrees. There is no need for the rotating plate 2 to rotate 90 degrees and then reset, which can improve the steering efficiency of the circuit board.

[0049] The above are only some embodiments of the present invention, which are intended to illustrate the technical means of the present invention, but not to limit the technical scope of the present invention. Those skilled in the art can make obvious improvements to the present invention in combination with existing common knowledge, which all fall within the protection scope of the present invention.

Claims

1. Automatic screen printing steering device for printed circuit boards, characterized in that: include: A conveying part, the conveying part comprises a plurality of rollers, each of which is fixed with a plurality of rollers; A rotating plate, wherein a plurality of through holes are provided on the rotating plate, and the rotating plate is located above the roller; and The driving device is located below the roller and can drive the rotating plate to move up and down, and can drive the rotating plate to rotate in a horizontal plane. When the bottom of the rotating plate abuts against the roller, each through hole encloses the periphery of a roller, the highest point of the roller enclosed by the through hole protrudes from the top of the rotating plate and the roller can rotate.

2. The automatic screen printing steering device for printed circuit boards according to claim 1, characterized in that: The driving device is a rotary telescopic cylinder.

3. The automatic screen printing steering device for printed circuit boards according to claim 2, characterized in that: The end of the piston rod of the rotary telescopic cylinder passes through the gap between the two rollers and is fixed on the bottom of the rotating plate.

4. The automatic screen printing steering device for printed circuit boards according to claim 1, characterized in that: The plurality of rollers are arranged in parallel and at equal intervals, the plurality of rollers on each roller are arranged at equal intervals, and the plurality of through holes on the rotating plate are arranged in a matrix.

5. The automatic screen printing steering device for printed circuit boards according to claim 1, characterized in that: The difference between the outer circle radius and the inner circle radius of the roller is greater than the thickness of the rotating plate.

6. The automatic screen printing steering device for printed circuit boards according to claim 4, characterized in that: The four corners of the rotating plate are all chamfered.

7. The automatic screen printing steering device for printed circuit boards according to claim 1, characterized in that: It also includes a bracket, the roller is arranged on the bracket, the roller can rotate on the bracket, the bracket is provided with a crossbeam, and the driving device is arranged on the crossbeam.

8. The automatic screen printing steering device for printed circuit boards according to claim 1, characterized in that: The radial cross section of the through hole is circular.

9. The automatic screen printing steering device for printed circuit boards according to any one of claims 1 to 8, characterized in that: It also includes a motor, which drives the multiple rollers to rotate synchronously.

10. The automatic screen printing steering device for printed circuit boards according to claim 9, characterized in that: It also includes a synchronous toothed belt, a first gear is arranged on the rotating shaft of the motor, a second gear is arranged at the end of the roller, the synchronous toothed belt is ringed on the first gear and the second gear, and the first gear drives each second gear to rotate through the synchronous toothed belt.

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