Electromagnetic shielding layer integrated forming device for soft circuit board

Abstract

The invention relates to the technical field of printed circuit boards, in particular to an electromagnetic shielding layer integrated forming device for a soft circuit board, which comprises a conveying table, a conveying frame is mounted at the top of the conveying table, a transfer assembly is mounted in the conveying frame, and a deviation rectifying assembly is mounted at the top of the conveying frame; the transfer assembly comprises an air floating guide rail, a rotating rod, push plates, a multi-point supporting assembly and a motor, the air floating guide rail is installed at the bottom of the conveying frame, the rotating rod is rotationally connected with the inner wall of the conveying frame, the push plates are fixed to the rotating rod, the motor is installed on one side of the conveying frame and drives the rotating rod to rotate, and the multi-point supporting assembly is installed at the ends, away from the rotating rod, of the push plates. The soft circuit board electromagnetic shielding layer forming equipment solves the technical problems that a soft circuit board after being conveyed is difficult to align with a copper foil and the alignment and overlapping effects of an electromagnetic shielding layer on the soft circuit board are influenced due to the fact that a flexible material is easily stretched and deformed during conveying by the existing soft circuit board electromagnetic shielding layer forming equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of printed circuit boards, in particular to an integrated forming device for an electromagnetic shielding layer of a flexible circuit board. Background Art

[0002] The mainstream method of forming the electromagnetic shielding layer of the flexible circuit board is to press the prefabricated ultra-thin conductive copper foil, or copper alloy foil, onto the surface of the flexible circuit board by hot pressing or adhesive. After searching, the Chinese invention patent with application number CN202010364350.1 discloses a circuit board with an electromagnetic shielding structure and its manufacturing method. The side closed-loop shielding wall is formed by electroplating or filling the closed-loop blind grooves connected end to end with conductive materials, which can achieve an excellent side shielding effect. The side closed-loop shielding wall electrically connects the upper and lower metal shielding layers to form an electromagnetic shielding structure with a continuous closed space, which can form a very perfect electromagnetic shielding effect for the conductive circuit in the middle.

[0003] The above device is suitable for ordinary circuit board substrates, but the flexible material of the flexible circuit board substrate is easily stretched and deformed during transmission, which can easily make it difficult to align the flexible circuit board with the copper foil after transmission, affecting the alignment and overlapping effect of the electromagnetic shielding layer on the flexible circuit board. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides an integrated molding device for the electromagnetic shielding layer of a flexible circuit board, which solves the technical problem that the existing electromagnetic shielding layer molding equipment for flexible circuit boards easily stretches and deforms the flexible material during transportation, resulting in difficulty in aligning the flexible circuit board with the copper foil after transportation, affecting the alignment and overlapping effect of the electromagnetic shielding layer on the flexible circuit board.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: An integrated molding device for an electromagnetic shielding layer of a flexible circuit board includes a conveyor platform, a conveyor frame is installed on the top of the conveyor platform, a transfer component is installed inside the conveyor frame, and a correction component is installed on the top of the conveyor frame; The transfer assembly includes an air-floating guide rail, a rotating rod, a push plate, a multi-point support assembly and a motor. The air-floating guide rail is installed at the bottom of the conveying frame. The rotating rod is rotatably connected to the inner wall of the conveying frame. Multiple push plates are fixed on the rotating rod. The motor is installed on one side of the conveying frame and drives the rotating rod to rotate. The multi-point support assembly is installed on the end of the push plate away from the rotating rod.

[0006] Furthermore, the multi-point support assembly includes a circular frame, a tripod, a counterweight and a contact head. The circular frame is fixedly connected to the push plate, the tripod is rotatably connected to the circular frame, the counterweight is fixed at the bottom of the tripod, and multiple contact heads are installed on the top of the tripod.

[0007] Furthermore, the contact head corresponds to the support leg of the tripod, and the contact head passes through the support leg of the tripod.

[0008] Furthermore, a plurality of longitudinal blocks are slidably connected to the top of the push plate, a spring is fixedly connected between the longitudinal block and the circular frame, and an extension plate is fixedly connected to the side of the longitudinal block away from the spring.

[0009] Furthermore, the top of the extension plate is fixedly connected to an outer frame, and the inner part of the outer frame is rotatably connected to a plurality of rollers extending to the outside thereof.

[0010] Furthermore, the extension plate includes an inclined plate 1 and an inclined plate 2, and the projection of the lifting block on the horizontal plane is within the projection of the inclined plate 1 on the horizontal plane.

[0011] Furthermore, the correction assembly includes a track frame, a slider and a cylinder. The track frame is fixed to the top of the conveying frame, the slider slides along the top of the track frame, and the cylinder is installed on the track frame and drives the slider to move.

[0012] Furthermore, a slide groove is provided on one side of the slider, a horizontal block passing through the slide groove is provided on one side of the slider, the movable end of the cylinder is fixedly connected to the horizontal block, and the bottom of the slider is fixedly connected to a limiting column.

[0013] Furthermore, the track frame includes an arc section, a transverse plate section and a longitudinal plate section, the arc section, the transverse plate section and the longitudinal plate section are an integrated structure, and the arc section extends from the edge of the conveying frame to the center of the conveying frame.

[0014] By means of the above technical solution, the present invention provides an integrated forming device for an electromagnetic shielding layer of a flexible circuit board, which has at least the following beneficial effects: 1. The present invention adopts a transfer assembly and an air-floating guide rail to reduce direct contact with the flexible material during transportation. Then, the multi-point support of the flexible material is used to make the force distribution of the contact with the flexible material more uniform during transfer, thereby reducing the possibility of stretching and deforming the flexible material during transportation. It makes it easier to align the flexible circuit board with the copper foil after transportation, ensuring the alignment and overlapping effect of the electromagnetic shielding layer on the flexible circuit board.

[0015] 2. The present invention provides a multi-point support assembly to reduce the angle change of the contact head when the flexible material is flipped from the conveyor frame to the processing table, ensuring that the contact head always has a large area to support the flexible material directly upward, thereby reducing the possibility of the flexible material falling off the contact head and allowing the flexible material to move to a designated position on the copper foil surface of the processing table when it is flipped.

[0016] 3. The present invention provides the spring, extension plate, outer frame and roller, so that the outer frame and roller can move away from the contact head when the mass of the conveyed flexible material increases, thereby supporting the flexible material from a larger area, while reducing the pulling on the flexible material during support, and reducing the possibility of deformation of the flexible material due to excessive squeezing force per unit area caused by supporting the flexible material from a reduced area.

[0017] 4. The present invention provides a deviation correction component, which can promptly correct the deviation of the flexible material from the center of the conveying path to the edge, and push the flexible material at the edge back to the center of the conveying path, so that the position of the flexible material transferred to the copper foil surface on the processing table will not be offset.

[0018] 5. The present invention provides a horizontal block and a track frame, so that when the slider moves along the track frame, it can push the flexible material at the edge of the moving path to move toward the center of the moving path, while ensuring that the slider always remains connected to the cylinder when moving to different positions of the track frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a schematic structural diagram of the present invention as a whole; Figure 2 It is a structural schematic diagram of the conveying frame and transfer assembly of the present invention; Figure 3 It is a schematic diagram of the partial structure of the transfer component of the present invention; Figure 4 It is a structural schematic diagram of the multi-point support assembly of the present invention; Figure 5 is an internal cross-sectional view of the multi-point support assembly of the present invention; Figure 6 It is a schematic structural diagram of the extension plate and the roller of the present invention; Figure 7 Schematic diagram of the structure of the correction component of the present invention; Figure 8 It is a structural schematic diagram of the track frame and slider of the present invention.

[0020] In the figure: 1. Processing table; 2. Conveyor table; 3. Conveyor frame; 4. Transfer assembly; 41. Air float guide rail; 42. Rotating rod; 43. Push plate; 44. Multi-point support assembly; 441. Round frame; 442. Tripod; 443. Counterweight; 444. Contact head; 4441. Arc plate; 4442. Round block; 4443. Lifting block; 45. Motor; 5. Correction assembly; 51. Track frame; 511. Arc section; 512. Horizontal plate section; 513. Vertical plate section; 52. Slider; 53. Cylinder; 6. Longitudinal block; 7. Spring; 8. Extension plate; 81. Inclined plate 1; 82. Inclined plate 2; 9. Outer frame; 10. Roller; 11. Slide; 12. Horizontal block; 13. Limit column. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1 In order to reduce the possibility of the flexible material of the flexible circuit board being stretched and deformed during transportation, maintain the basic shape of the flexible circuit board substrate to reduce the effect of the alignment and superposition of the flexible circuit board and the electromagnetic shielding layer, please refer to Figure 1-Figure 5 This embodiment proposes an integrated molding device for an electromagnetic shielding layer of a soft circuit board, including a processing table 1 and a conveying table 2. A conveying frame 3 is installed on the top of the conveying table 2, a transfer assembly 4 is installed inside the conveying frame 3, and a correction assembly 5 is installed on the top of the conveying frame 3. The transfer assembly 4 includes an air-floating guide rail 41, a rotating rod 42, a push plate 43, a multi-point support assembly 44 and a motor 45. The air-floating guide rail 41 is installed at the bottom of the conveying frame 3, the rotating rod 42 is rotatably connected to the inner wall of the conveying frame 3, multiple push plates 43 are fixed on the rotating rod 42, the motor 45 is installed on one side of the conveying frame 3 and drives the rotating rod 42 to rotate, and the multi-point support assembly 44 is installed at the end of the push plate 43 away from the rotating rod 42.

[0023] During use, the electromagnetic shielding layer forming process of the flexible circuit board requires laminating the flexible material and the copper foil, and then performing hot pressing. The copper foil is transported by a common suction cup and pneumatic rail transportation method. The suction cup is adsorbed on the copper foil to fix the copper foil, and then the pneumatic rail drives the suction cup and the copper foil to move to the processing table 1. The specific conveying process of the flexible material includes the following steps: First, the flexible materials are conveyed into the conveying frame 3 one by one, and then the air flotation guide rail 41 in the conveying frame 3 ejects air in a directional manner. The air flotation guide rail 41 suspends the flexible materials through the air flow to reduce physical contact. The materials rely on the air flow or inertia to move in and along the conveying frame 3 until the flexible materials are conveyed to the transfer component 4. Then the motor 45 drives the rotating rod 42 and the push plate 43 to rotate 180 degrees. The multi-point support component 44 supports the flexible material from the bottom of the flexible material, and then pushes the flexible material to rotate with the push plate 43, flipping the flexible material from the conveying frame 3 to the copper foil surface on the processing table 1. Then, the combination of the suction cup and the pneumatic track commonly used in the electromagnetic shielding layer molding equipment of the soft circuit board is used. The laminated copper foil and flexible material are transferred to the hot pressing equipment for hot pressing and forming. The motor 45 then drives the rotating rod 42 and the push plate 43 to rotate 180 degrees in the opposite direction and then return to the starting point. The above process is repeated to continuously transfer the flexible material transported by the air floating guide rail 41 in the conveying frame 3 to the processing table 1 for bonding with the copper foil. The use of the air floating guide rail 41 reduces the direct contact with the flexible material during transportation. Then, the support of the flexible material at multiple points is used to make the force distribution of the contact with the flexible material during transfer more uniform, reducing the possibility of stretching and deforming the flexible material during transportation, making it easier to align the transferred flexible circuit board with the copper foil, and ensuring the alignment and lamination effect of the electromagnetic shielding layer on the flexible circuit board.

[0024] Since the angle of the flexible material changes when it is flipped, it is easy to fall off from the multi-point support assembly 44 when the angle with the horizontal plane is large, resulting in the inability to move to the designated position of the copper foil surface on the processing table 1. In order to better support the flexible material when it is flipped to different angles, refer to Figure 5 The multi-point support assembly 44 includes a circular frame 441, a tripod 442, a counterweight 443 and a contact head 444. The circular frame 441 is fixedly connected to the push plate 43, the tripod 442 is rotatably connected to the circular frame 441, the counterweight 443 is fixed at the bottom of the tripod 442, and multiple contact heads 444 are all installed on the top of the tripod 442. The contact heads 444 correspond to the support feet of the tripod 442, and the contact heads 444 pass through the support feet of the tripod 442.

[0025] When in use, the circular frame 441 and the contact head 444 are initially facing upward. When the flexible material in the conveying frame 3 is conveyed to a position close to the processing table 1 by the air-floating guide rail 41, the motor 45 drives the rotating rod 42, the push plate 43 and the multi-point support assembly 44 to rotate. After the multi-point support assembly 44 is tilted, the angle gradually changes, driving the tripod 442 and the counterweight block 443 to rotate. After the contact head 444 is tilted, the projected area on the horizontal plane is reduced, resulting in a reduction in the area supporting the flexible material, which makes it easy for the flexible material to fall off from the contact head 444. The counterweight block 443 uses the principle of leverage to keep the contact head 444 on the top of the tripod 442 always tending to a horizontal posture, reducing the impact of the multi-point support assembly 44 on the support area when it is tilted, and can reduce the angle change of the contact head 444 when the flexible material is flipped from the conveying frame 3 to the processing table 1, so that the contact head 444 always has a larger area to support the flexible material directly upward, thereby reducing the possibility of the flexible material falling off the contact head 444, and allowing the flexible material to move to a specified position on the copper foil surface on the processing table 1 when it is flipped.

[0026] Example 2 When processing flexible circuit boards of different sizes, the sizes of the flexible materials and copper foils used will also change. In order to prevent the increase in the mass of the flexible material from increasing the squeezing force on the contact head 444, which may cause the flexible material to be squeezed too hard and deformed, refer to Figures 1-6 On the basis of embodiment 1, a plurality of longitudinal blocks 6 are slidably connected to the top of the push plate 43, a spring 7 is fixedly connected between the longitudinal block 6 and the circular frame 441, an extension plate 8 is fixedly connected to the side of the longitudinal block 6 away from the spring 7, an outer frame 9 is fixedly connected to the top of the extension plate 8, a plurality of rollers 10 extending to the outside of the outer frame 9 are rotatably connected inside the extension plate 8, the extension plate 8 includes an inclined plate 1 81 and an inclined plate 2 82, and the projection of the lifting block 4443 on the horizontal plane is within the projection of the inclined plate 1 81 on the horizontal plane.

[0027] When in use, the spring 7 pulls the longitudinal block 6, the extension plate 8, the outer frame 9 and the roller 10 to move closer to the circular frame 441. The extension plate 8 pushes the lifting block 4443 to rise during the movement, so that the lifting block 4443 is maintained at a higher position. When the flexible material moves to above the contact head 444, the contact head 444 pushes the flexible material to flip from the bottom of the flexible material. At this time, the weight of the flexible material is supported by the lifting block 4443. When the mass of the flexible material increases, the force of the flexible material squeezing the lifting block 4443 downward will increase, pushing the lifting block 4443 down. During the descent process, the lifting block 4443 squeezes the extension plate 8, pushing the inclined plate 81 to move away from the circular frame 441, and the extension plate 8 pulls the spring 7 to become longer, while driving the outer frame 9 and the roller 10 to move away from the circular frame 441 and The lifting block 4443 moves in the direction of movement, so that the outer frame 9 and the roller 10 support the flexible material from a position farther away from the contact head 444, and the roller 10 reduces the friction with the flexible material, reducing the possibility of the flexible material being pulled and deformed when supported, until the flexible material on the contact head 444 is transferred to the processing table 1. At this time, the contact head 444 is no longer squeezed by the flexible material, and the spring 7 pulls the longitudinal block 6, the extension plate 8, the outer frame 9 and the roller 10 to move closer to the circular frame 441. When the mass of the conveyed flexible material increases, the outer frame 9 and the roller 10 can be moved away from the contact head 444, supporting the flexible material from a larger area, while reducing the pulling of the flexible material during support, and reducing the possibility of the flexible material being deformed due to excessive squeezing force per unit area caused by supporting the flexible material with a reduced area.

[0028] Example 3 In order to correct the position of the flexible material in time when the flexible material moves along the conveying frame 3 so that the position of the copper foil surface on the processing table 1 will not be offset, refer to Figures 1-8 Based on the first embodiment, the correction component 5 includes a track frame 51, a slider 52 and a cylinder 53. The track frame 51 is fixed to the top of the conveying frame 3, the slider 52 slides along the top of the track frame 51, and the cylinder 53 is installed on the track frame 51 and drives the slider 52 to move.

[0029] When in use, the cylinder 53 drives the slider 52 to move along the track frame 51. When the flexible material is always in the center of the conveying frame 3, the flexible material will not contact the slider 52, and the conveying process of the flexible material will not be affected by the correction component 5. When the flexible material deviates from the center to the edge of the conveying frame 3, it will move to the moving track of the slider 52, be pushed by the moving slider 52, and then move toward the center of the conveying frame 3 along the track of the track frame 51. When the flexible material deviates from the center to the edge of the conveying path, it can be corrected in time, and the flexible material at the edge can be pushed back to the center of the conveying path, so that the position of the copper foil surface on the processing table 1 when the flexible material is transferred will not be offset.

[0030] In order to enable the slider 52 to push the flexible material at the edge of the moving path to move toward the center of the moving path when it moves along the track frame 51, and to ensure that the slider 52 always maintains connection with the cylinder 53 when it moves to different positions of the track frame 51, refer to Figure 8 A slide groove 11 is provided on one side of the slider 52, and a horizontal block 12 is provided on one side of the slider 52 that passes through the slide groove 11. The movable end of the cylinder 53 is fixedly connected to the horizontal block 12, and the bottom of the slider 52 is fixedly connected to the limiting column 13. The track frame 51 includes an arc segment 511, a horizontal plate segment 512 and a vertical plate segment 513. The arc segment 511, the horizontal plate segment 512 and the vertical plate segment 513 are an integrated structure. The arc segment 511 extends from the edge of the conveying frame 3 to the center of the conveying frame 3.

[0031] When in use, the cylinder 53 is connected to the cross block 12. When the slider 52 moves along the track frame 51, the cross block 12 moves accordingly along the slide groove 11. When the slider 52 is in the arc section 511 away from one end of the cross plate section 512, the slider 52 is at the edge of the conveying frame 3. In the process of the slider 52 moving along the arc section 511 toward the cross plate section 512, the slider 52 gradually moves from the edge of the conveying frame 3 to the center. When the flexible material moves to the edge of the conveying frame 3, it will be pushed by the slider 52 to move toward the center of the conveying frame 3 until the slider 52 moves to the cross plate section 512, and then the cylinder 53 drives the slider 52 to slide along the track frame 51 to the starting point. The above process is repeated continuously, so that the slider 52 can push the flexible material at the edge of the moving path to move toward the center of the moving path when moving along the track frame 51. At the same time, it is ensured that the slider 52 always remains connected to the cylinder 53 when moving to different positions of the track frame 51.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An integrated forming device for an electromagnetic shielding layer of a flexible circuit board, comprising a conveying platform (2), characterized in that: A conveying frame (3) is installed on the top of the conveying platform (2), a transfer component (4) is installed inside the conveying frame (3), and a deviation correction component (5) is installed on the top of the conveying frame (3); The transfer assembly (4) includes an air-floating guide rail (41), a rotating rod (42), a push plate (43), a multi-point support assembly (44) and a motor (45), wherein the air-floating guide rail (41) is mounted on the bottom of the conveying frame (3), the rotating rod (42) is rotatably connected to the inner wall of the conveying frame (3), a plurality of push plates (43) are fixed on the rotating rod (42), the motor (45) is mounted on one side of the conveying frame (3) and drives the rotating rod (42) to rotate, and the multi-point support assembly (44) is mounted on one end of the push plate (43) away from the rotating rod (42).

2. The electromagnetic shielding layer integrated molding device for a flexible circuit board according to claim 1, characterized in that: The multi-point support assembly (44) includes a circular frame (441), a tripod (442), a counterweight (443) and a contact head (444). The circular frame (441) is fixedly connected to the push plate (43), the tripod (442) is rotatably connected to the circular frame (441), the counterweight (443) is fixed to the bottom of the tripod (442), and the plurality of contact heads (444) are all installed on the top of the tripod (442).

3. The electromagnetic shielding layer integrated molding device for a flexible circuit board according to claim 2, characterized in that: The contact head (444) corresponds to the support foot of the tripod (442), and the contact head (444) passes through the support foot of the tripod (442).

4. The electromagnetic shielding layer integrated molding device for a flexible circuit board according to claim 3, characterized in that: The top of the push plate (43) is slidably connected to a plurality of longitudinal blocks (6), a spring (7) is fixedly connected between the longitudinal blocks (6) and the circular frame (441), and an extension plate (8) is fixedly connected to the side of the longitudinal blocks (6) away from the spring (7).

5. The integrated forming device for the electromagnetic shielding layer of a flexible circuit board according to claim 4, characterized in that: The top of the extension plate (8) is fixedly connected to an outer frame (9), and the inner part of the outer frame (9) is rotatably connected to a plurality of rollers (10) extending to the outside thereof.

6. The integrated forming device for the electromagnetic shielding layer of a flexible circuit board according to claim 4, characterized in that: The extension plate (8) comprises an inclined plate 1 (81) and an inclined plate 2 (82), and the projection of the lifting block (4443) on the horizontal plane is within the projection of the inclined plate 1 (81) on the horizontal plane.

7. The integrated forming device for the electromagnetic shielding layer of a flexible circuit board according to claim 1, characterized in that: The deviation-correcting assembly (5) comprises a track frame (51), a slider (52) and a cylinder (53). The track frame (51) is fixed on the top of the conveying frame (3). The slider (52) slides along the top of the track frame (51). The cylinder (53) is installed on the track frame (51) and drives the slider (52) to move.

8. The integrated forming device for the electromagnetic shielding layer of a flexible circuit board according to claim 7, characterized in that: A slide groove (11) is provided on one side of the slider (52), a horizontal block (12) penetrating the slide groove (11) is provided on one side of the slider (52), a movable end of the cylinder (53) is fixedly connected to the horizontal block (12), and a limiting column (13) is fixedly connected to the bottom of the slider (52).

9. The integrated forming device for the electromagnetic shielding layer of a flexible circuit board according to claim 7, characterized in that: The track frame (51) comprises an arc segment (511), a transverse plate segment (512) and a longitudinal plate segment (513); the arc segment (511), the transverse plate segment (512) and the longitudinal plate segment (513) are an integrated structure; the arc segment (511) extends from the edge of the conveying frame (3) to the center of the conveying frame (3).

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