A PCB inner layer pre-lamination device and a pre-lamination process

Abstract

The present invention discloses a PCB inner layer pre-stack device and a pre-stack process, which relates to the technical field of electronic component manufacturing. It includes an equipment box. At one end of the bottom inner wall of the equipment box, a conveyor is fixedly arranged. Positioning mechanisms are symmetrically arranged on both sides of the conveyor. At the other end of the bottom inner wall of the equipment box, eight holding mechanisms are arranged. On one side of the bottom inner wall of the equipment box, a stacking mechanism is arranged. The stacking mechanism includes a first rotating shaft. A transmission mechanism is arranged below the first rotating shaft. The transmission mechanism includes a second rotating shaft. At one end of the second rotating shaft, two symmetrically arranged rotating mechanisms are arranged; by setting the stacking mechanism, the transmission mechanism, the rotating mechanism and the holding mechanism, the operation of the stacking mechanism can drive the operation of the transmission mechanism and the rotating mechanism, and further drive the holding mechanism to rotate, reducing the floor area of the device and accelerating the pre-stack efficiency; by setting the positioning mechanism, when the positioning mechanism works, it can position the four-layer PCB board.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic component manufacturing, and particularly to a PCB inner layer pre-stack device and a pre-stack process. Background Art

[0002] A PCB, i.e., a printed circuit board, is an important electronic component and also an important part of electronic products. The main function of a PCB is to transfer the circuit pattern on the circuit board to the printed circuit to form a circuit structure with certain functions. And the inner layer pre-stack of a PCB is an important step in the PCB production process, which belongs to the stacking preparation stage in the production of multi-layer PCB boards. Specifically, the inner layer pre-stack is a task carried out before the lamination of multi-layer PCB boards. The main purpose is to align, stack or register the loose materials such as inner layer boards and prepregs (also known as pre-impregnated materials) with auxiliary materials such as steel plates and kraft paper pads according to the design requirements for subsequent lamination. Among them, a four-layer PCB board generally includes a top layer, a first middle layer, a second middle layer and a bottom layer, and prepregs are generally provided between layers. The pre-stack operation needs to be carried out on these four layers, so a pre-stack device is required.

[0003] When the existing pre-stack device pre-stacks a four-layer PCB board, when pre-stacking different layers, it often needs to move the already stacked inner layer to another station and then use the stacking component to repeat the pre-stack process for other layers, resulting in a large floor area of the whole device, a long pre-stack time and a low inner layer pre-stack efficiency. Moreover, when the existing pre-stack device is in use, when stacking one layer on another layer, the stacking orientation may not be accurate enough, resulting in a large position deviation between layers. Lack of positioning measures may cause defects in the subsequent lamination process and reduce the yield. In view of the above problems, the inventor proposes a PCB inner layer pre-stack device and a pre-stack process to solve the above problems. Summary of the Invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a PCB inner layer pre-stack device and a pre-stack process.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions: A PCB inner layer pre-stack device and a pre-stack process, including an equipment box. At one end of the bottom inner wall of the equipment box, a conveyor is fixedly arranged for conveying the pre-stacked PCB inner layers. On both sides of the conveyor, positioning mechanisms for positioning the PCB inner layers are symmetrically arranged. At the other end of the bottom inner wall of the equipment box, eight placing mechanisms for placing each layer of materials constituting the PCB inner layer are provided. The placing mechanism includes a fifth rotating shaft and a placing box fixedly and cooperatively connected to the other end of the fourth rotating shaft. At the center of each of the four sides of the inner wall of the placing box, two first fixing blocks are fixedly arranged. On one side of the first fixing block, a first rack is fixedly arranged through an electric telescopic rod. On the surface of the first rack, a first trough-shaped plate fixedly cooperatively connected to the surface of the placing box slides. On one side of the first rack, a first spur gear is meshed. The first spur gear is sleeved on the fifth rotating shaft. At the top of the fifth rotating shaft, a second fixing block fixedly cooperatively connected to the top of the side of the inner wall of the placing box is rotatably arranged. On the surface of the fifth rotating shaft, a second spur gear is sleeved. On one side of the second spur gear, a second rack is meshed. The second rack is fixedly provided with an adjusting plate through a moving block. On both sides of the moving block, third fixing blocks fixedly cooperatively connected to the outer ring of the inner wall of the placing box slide symmetrically. On one side of the bottom inner wall of the equipment box, a stacking mechanism for pre-stacking the PCB inner layers is provided. The stacking mechanism includes a first rotating shaft. The stacking mechanism further includes two first L-shaped stabilizing plates fixedly cooperatively connected to one side of the bottom inner wall of the equipment box. At one end of the first L-shaped stabilizing plate, a mounting plate rotatably cooperatively connected to the first rotating shaft is fixedly arranged. At both ends of one side of the mounting plate, a fourth fixing block and a second L-shaped stabilizing plate are respectively fixedly arranged. At the top of one side of the mounting plate, a second trough-shaped plate is fixedly arranged. At the center of one side of the mounting plate, a first connecting shaft rotatably cooperatively connected to one end of the inner wall of the second L-shaped stabilizing plate is rotatably arranged. On one side of the fourth fixing block, a third rack slidably cooperatively connected to the inner wall of the second trough-shaped plate is fixedly arranged through a first air cylinder. At the bottom of the third rack, a third spur gear sleeved and cooperatively connected to the first rotating shaft is meshed. At the bottom of the third spur gear, a transmission gear sleeved on the first connecting shaft is meshed. One end of the first rotating shaft passes through the mounting plate and is fixedly provided with a swinging plate. On one side of the swinging plate, a first moving plate is hinged. At the bottom end of the first moving plate, a second moving plate is fixedly arranged. At the bottom of the second moving plate, a stacking plate is fixedly arranged through a plurality of second air cylinders. At both ends of the bottom of the stacking plate, mounting blocks are symmetrically fixedly arranged through bolts. At the bottom of the mounting block, a plurality of pin-type suction cups are fixedly arranged. On the other side of the mounting plate, a slide rail is fixedly arranged. On the surface of the slide rail, a movable block slidably cooperatively connected to the surface of the first moving plate slides. Below the first rotating shaft, a transmission mechanism for transmitting the power of the stacking mechanism is provided. The transmission mechanism includes a second rotating shaft. At one end of the second rotating shaft, two symmetrically arranged rotating mechanisms for continuously driving the placing mechanism to rotate are provided. The rotating mechanism includes a first vertical plate fixedly cooperatively connected to the outer ring of the bottom inner wall of the equipment box. On one side of the first vertical plate, an annular groove is fixedly arranged through a fixing disk. On the other side of the first vertical plate, a third rotating shaft is rotatably arranged.One end of the third rotating shaft passes through the first vertical plate and the fixed plate and is fixed with a first rotating plate. The outer wall of the first rotating plate is fixed with eight connecting rods. One end of the connecting rod is rotatably provided with a fourth rotating shaft connected with the containing mechanism. One end of the fourth rotating shaft is fixed with a rotating bar. One end of the rotating bar is hinged with an arc-shaped slider that slides with the inner wall of the annular groove, and two adjacent fourth rotating shafts are hingedly matched through a movable rod.

[0006] Preferably, the transmission mechanism also includes a second vertical plate and a third vertical plate fixedly matched with the inner ring of the bottom inner wall of the equipment box, one end of one side of the second vertical plate is rotatably provided with a first check block through the second connecting shaft, the second connecting shaft is transmission-matched with the first connecting shaft through the first synchronous belt and the first synchronous wheel, one side of the third vertical plate is rotatably provided with a third connecting shaft, the center of the third connecting shaft is fixedly provided with a fixing ring, one end of the third connecting shaft is slidably provided with a sliding sleeve, a first spring fixedly provided between the fixing ring and the sliding sleeve, one end of the sliding sleeve is fixedly provided with a second check block meshing with one side of the first check block, and the other end of one side of the second vertical plate is rotatably provided with a fourth The second rotating disk is fixedly mounted on the second rotating shaft, and the second rotating disk is fixedly mounted on the second rotating shaft to the drive transmission mechanism.

[0007] Preferably, the positioning mechanism includes a third L-shaped stabilizing plate fixedly fitted to one side of the conveyor. A third cylinder is fixedly installed at the top end of one side of the third L-shaped stabilizing plate. The output end of the third cylinder is fixedly provided with a moving rod through a fifth fixing block. One end of the moving rod passes through the third L-shaped stabilizing plate and is fixedly provided with a first intermediate plate. First through holes are symmetrically formed at both ends of one side of the first intermediate plate. First guide rods are slidably arranged in the first through holes. One end of each first guide rod is fixedly provided with a first positioning plate. A second spring sleeved on the first guide rod is fixedly arranged between the first intermediate plate and the first positioning plate. Two third channel-shaped plates are fixedly provided at the bottom end of one side of the third L-shaped stabilizing plate. A fourth rack is slidably arranged on the inner wall of the third channel-shaped plate. A fifth rack is fixedly provided at the bottom of the moving rod. Mounting blocks are symmetrically and fixedly arranged at both ends of one side of the third L-shaped stabilizing plate. A first transmission shaft is rotatably arranged between the two mounting blocks. A fourth spur gear meshing with the bottom of the fifth rack is sleeved on the center of the first transmission shaft. First bevel gears are sleeved on both ends of the first transmission shaft and pass through the mounting blocks respectively. Two second transmission shafts are symmetrically and rotatably arranged on the outer circle of one side of the third L-shaped stabilizing plate. A second bevel gear meshing with the first bevel gear is sleeved on one end of each second transmission shaft. A fifth spur gear meshing with the top of the fourth rack is sleeved on the center of each second transmission shaft. One end of the fourth rack is fixedly installed with a motor through a connecting block. An installation groove is formed at the top of the connecting block. The output end of the motor passes through the connecting block and is fixedly provided with a round block rotatably fitted with the installation groove. A second intermediate plate is fixedly provided at the top of the round block through an L-shaped connecting bar. Second through holes are symmetrically formed at both ends of one side of the second intermediate plate. Second guide rods are slidably arranged in the second through holes. One end of each second guide rod is fixedly provided with a second positioning plate. A third spring sleeved on the second guide rod is fixedly arranged between the second intermediate plate and the second positioning plate.

[0008] A pre-stack process of a PCB inner layer pre-stack device includes the following steps:

[0009] S1: Adsorb a bottom layer material, and drive the stacking plate and the needle-type suction cup to move to the storage box containing the bottom layer material through the movement of the third rack;

[0010] S2: Move the bottom layer material to the conveyor, and drive the stacking plate and the needle-type suction cup to move above the conveyor through the movement of the third rack back to the original position;

[0011] S3: Position the bottom layer material, and drive the first positioning plate and the second positioning plate to reciprocate through the movement of the moving rod, and repeatedly contact the bottom layer material;

[0012] S4: Move the storage box containing the semi-cured sheet to the top position, drive the second connecting shaft to rotate through the rotation of the third spur gear, and then drive the first check block and the second check block to rotate, and then drive the first rotating disk and the connecting rod to rotate, so as to achieve the purpose of moving the storage box containing the semi-cured sheet to the top position;

[0013] S5: Adsorb a prepreg, repeat S1 to S4, move the prepreg to the bottom material, and position it;

[0014] S6: stack the materials of the second middle layer, the first middle layer, and the top layer on the materials of the bottom layer respectively, repeat S1 to S5, stack the materials of the bottom layer, the second middle layer, the first middle layer, and the top layer together, and sandwich a layer of prepreg between each layer, thereby completing the pre-stacking operation of the entire PCB four-layer board.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention sets a stacking mechanism, a transmission mechanism, a rotating mechanism and a containing mechanism, so that the stacking mechanism can drive the transmission mechanism to work, and then drive the rotating mechanism to operate, and then drive the containing mechanism to rotate, so that when the device pre-stacks different layers, it is not necessary to move the already stacked inner layer to another station, which significantly reduces the footprint of the device, shortens the pre-stacking time, and speeds up the pre-stacking efficiency; by setting a positioning mechanism, the positioning mechanism works, and the four-layer PCB can be positioned, avoiding the problem of inaccurate stacking orientation and large position deviation between layers when one layer is stacked on another layer, thereby improving the yield rate;

[0017] 2. The present invention utilizes the movement of the third rack to drive the needle suction cup to move back and forth between the holding box located at the top and the conveyor, and drives the second connecting shaft to rotate, thereby driving the second rotating disk and the toggle bar to rotate, thereby driving the first rotating disk and the connecting rod to rotate, thereby driving the holding box to rotate, thereby realizing the pre-stacking operation of the inner layer of the PCB;

[0018] 3. The present invention utilizes the movement of the moving rod to drive the movement of the first middle plate and the first positioning plate, and when the moving rod moves, it drives the fourth rack and the second positioning plate to move back and forth, so that the first positioning plate and the second positioning plate move back and forth and repeatedly contact the bottom material, thereby positioning the bottom material. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall external structure of the present invention.

[0021] Figure 2It is a schematic structural diagram of the first perspective inside the equipment box of the present invention.

[0022] Figure 3 It is a schematic structural diagram of the second perspective inside the equipment box of the present invention.

[0023] Figure 4 It is a schematic structural diagram of the rotating mechanism of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the holding mechanism of the present invention.

[0025] Figure 6 It is a schematic structural diagram of the stacking mechanism of the present invention.

[0026] Figure 7 It is a schematic structural diagram of the transmission mechanism of the present invention.

[0027] Figure 8 It is a schematic structural diagram of the positioning mechanism of the present invention.

[0028] Figure 9 For the present invention Figure 2 Partial enlarged structural diagram of A.

[0029] Figure 10 For the present invention Figure 5 Partial enlarged structural diagram of A.

[0030] In the figure: 1. Equipment box; 2. Conveyor; 3. Positioning mechanism; 301. Third L-shaped stabilizing plate; 302. Third cylinder; 303. Moving rod; 304. First intermediate plate; 305. First guide rod; 306. First positioning plate; 307. Third trough-shaped plate; 308. Fourth rack; 309. Fifth rack; 310. First transmission shaft; 311. Fourth spur gear; 312. First bevel gear; 313. Second transmission shaft; 314. Connecting block; 315. Motor; 316. L-shaped connecting bar; 317. Second positioning plate; 4. Placing mechanism; 401. Placing box; 402. First fixing block; 403. Electric telescopic rod; 404. First rack; 405. First spur gear; 406. Fifth rotating shaft; 407. Second rack; 408. Moving block; 409. Adjusting plate; 5. Stacking mechanism; 501. First rotating shaft; 502. First L-shaped stabilizing plate; 503. Mounting plate; 504. Fourth fixing block; 505. Second L-shaped stabilizing plate; 506. First connecting shaft; 507. First cylinder; 508. Third rack; 509. Third spur gear; 510. Swing plate; 511. First moving plate; 512. Second cylinder; 513. Stacking plate; 514. Pin-type suction cup; 6. Transmission mechanism; 601. Second rotating shaft; 602. Second vertical plate; 603. Second connecting shaft; 604. First check block; 605. Third connecting shaft; 606. Sleeve; 607. Fourth connecting shaft; 608. Second rotating disk; 609. Poking bar; 610. Third rotating disk; 611. First cylindrical pin; 612. Fourth rotating disk; 7. Rotating mechanism; 701. First vertical plate; 702. Fixed disk; 703. Annular groove; 704. Third rotating shaft; 705. First rotating disk; 706. Connecting rod; 707. Fourth rotating shaft; 708. Rotating bar; 709. Arc-shaped slider; 710. Moving rod. Detailed implementation mode

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment: As Figures 1-10 shown, the present invention provides a PCB inner layer pre-stacking device and a pre-stacking process, including an equipment box 1, and a conveyor 2 for conveying the pre-stacked PCB inner layers is fixedly arranged at one end of the bottom of the inner wall of the equipment box 1:

[0033] On both sides of the conveyor 2, there are symmetrically arranged positioning mechanisms 3 for positioning the inner layer of the PCB. The positioning mechanism 3 includes a third L-shaped stabilizing plate 301 fixedly fitted to one side of the conveyor 2. At the top end of one side of the third L-shaped stabilizing plate 301, a third cylinder 302 is fixedly installed. The output end of the third cylinder 302 is fixedly provided with a moving rod 303 through a fifth fixing block. One end of the moving rod 303 passes through the third L-shaped stabilizing plate 301 and is fixedly provided with a first intermediate plate 304. At both ends of one side of the first intermediate plate 304, first through holes are symmetrically opened. First guide rods 305 are slidably arranged in the first through holes. One end of the first guide rod 305 is fixedly provided with a first positioning plate 306. A second spring sleeved on the first guide rod 305 is fixedly arranged between the first intermediate plate 304 and the first positioning plate 306, so that the movement of the moving rod 303 can drive the first positioning plate 306 to move and position each layer of material. At the bottom end of one side of the third L-shaped stabilizing plate 301, two third channel-shaped plates 307 are fixedly provided. A fourth rack 308 is slidably arranged on the inner wall of the third channel-shaped plate 307. A fifth rack 309 is fixedly provided at the bottom of the moving rod 303. At both ends of one side of the third L-shaped stabilizing plate 301, mounting blocks are symmetrically and fixedly provided. A first transmission shaft 310 is rotatably arranged between the two mounting blocks. A fourth spur gear 311 meshing with the bottom of the fifth rack 309 is sleeved at the center of the first transmission shaft 310. At both ends of the first transmission shaft 310, first bevel gears 312 are respectively sleeved and passed through the mounting blocks. On the outer ring of one side of the third L-shaped stabilizing plate 301, two second transmission shafts 313 are symmetrically and rotatably arranged. At one end of the second transmission shaft 313, a second bevel gear meshing with the first bevel gear 312 is sleeved. A fifth spur gear meshing with the top of the fourth rack 308 is sleeved at the center of the second transmission shaft 313. One end of the fourth rack 308 is fixedly installed with a motor 315 through a connecting block 314. An installation groove is opened at the top of the connecting block 314. The output end of the motor 315 passes through the connecting block 314 and is fixedly provided with a round block rotatably fitted with the installation groove. At the top of the round block, a second intermediate plate is fixedly provided through an L-shaped connecting bar 316. At both ends of one side of the second intermediate plate, second through holes are symmetrically opened. Second guide rods are slidably arranged in the second through holes. One end of the second guide rod is fixedly provided with a second positioning plate 317. A third spring sleeved on the second guide rod is fixedly arranged between the second intermediate plate and the second positioning plate 317, so that the movement of the fifth rack 309 can drive the second positioning plate 317 to move and position each layer of material;

[0034] At the other end of the bottom of the inner wall of the equipment box 1, there are eight placing mechanisms 4 for placing the materials of each layer that make up the inner layer of the PCB. The placing mechanism 4 includes a fifth rotating shaft 406 and a placing box 401 fixedly matched with the other end of the fourth rotating shaft 707. The opening of the placing box 401 is always upward. At the centers of the four sides of the inner wall of the placing box 401, two first fixing blocks 402 are fixedly provided. On one side of the first fixing block 402, a first rack 404 is fixedly provided through an electric telescopic rod 403. On the surface of the first rack 404, a first trough-shaped plate fixedly matched with the surface of the placing box 401 slides. The first trough-shaped plate plays a certain supporting role for the first rack 404, making the structural stability better when the first rack 404 moves. On one side of the first rack 404, a first spur gear 405 is engaged. The first spur gear 405 is sleeved on the fifth rotating shaft 406. At the top of the fifth rotating shaft 406, a second fixing block fixedly matched with the top of the side of the inner wall of the placing box 401 is rotatably provided. On the surface of the fifth rotating shaft 406, a second spur gear is sleeved. On one side of the second spur gear, a second rack 407 is engaged. The second rack 407 is fixedly provided with an adjusting plate 409 through a moving block 408. On both sides of the moving block 408, third fixing blocks fixedly matched with the outer circle of the inner wall of the placing box 401 slide symmetrically. The moving block 408 slides between the two third fixing blocks, which can improve the structural stability when the moving block 408 moves. When the electric telescopic rod 403 extends or contracts, it can drive the adjusting plate 409 to move, so that the adjusting plate 409 can be adjusted and adapted according to the materials of each layer with different sizes;

[0035] On one side of the bottom inside wall of the equipment box 1, there is a stacking mechanism 5 for pre-stacking the inner layer of the PCB. The stacking mechanism 5 includes a first rotating shaft 501. The stacking mechanism 5 further includes two first L-shaped stabilizing plates 502 fixedly fitted with one side of the bottom inside wall of the equipment box 1. One end of the first L-shaped stabilizing plate 502 is fixedly provided with a mounting plate 503 rotatably fitted with the first rotating shaft 501. At both ends of one side of the mounting plate 503, a fourth fixing block 504 and a second L-shaped stabilizing plate 505 are respectively fixedly provided. At the top end of one side of the mounting plate 503, a second trough-shaped plate is fixedly provided. At the center of one side of the mounting plate 503, a first connecting shaft 506 rotatably fitted with one end of the inner wall of the second L-shaped stabilizing plate 505 is rotatably provided. On one side of the fourth fixing block 504, a third rack 508 slidably fitted with the inner wall of the second trough-shaped plate is fixedly provided through a first air cylinder 507. At the bottom of the third rack 508, a third spur gear 509 sleeved and fitted with the first rotating shaft 501 is meshed. At the bottom of the third spur gear 509, a transmission gear sleeved on the first connecting shaft 506 is meshed, so that the movement of the third rack 508 can drive the first rotating shaft 501 to rotate self. One end of the first rotating shaft 501 passes through the mounting plate 503 and is fixedly provided with a swing plate 510. On one side of the swing plate 510, a first moving plate 511 is hinged. At the bottom end of the first moving plate 511, a second moving plate is fixedly provided. At the bottom of the second moving plate, a stacking plate 513 is fixedly provided through a plurality of second air cylinders 512. At both ends of the bottom of the stacking plate 513, mounting blocks are symmetrically fixedly provided through bolts. At the bottom of the mounting blocks, a plurality of needle-shaped suction cups 514 are fixedly provided. On the other side of the mounting plate 503, a slide rail is fixedly provided. On the surface of the slide rail, a movable block slidably fitted with the surface of the first moving plate 511 is slidably provided. Through the slide rail and the movable block, the moving track of the needle-shaped suction cups 514 can be restricted, so that the rotation of the first rotating shaft 501 can drive the needle-shaped suction cups 514 to move;

[0036] A transmission mechanism 6 for transmitting power to the stacking mechanism 5 is provided below the first rotating shaft 501. The transmission mechanism 6 includes a second rotating shaft 601. The transmission mechanism 6 also includes a second vertical plate 602 and a third vertical plate fixedly matched with the inner ring of the bottom inner wall of the equipment box 1. A first check block 604 is provided at one end of one side of the second vertical plate 602 through a second connecting shaft 603 for rotation. The second connecting shaft 603 is transmission-matched with the first connecting shaft 506 through a first synchronous belt and a first synchronous wheel. A third connecting shaft 605 is provided for rotation on one side of the third vertical plate. A fixing ring is fixed to the center, a sliding sleeve 606 is slidably provided at one end of the third connecting shaft 605, a first spring sleeved on the surface of the third connecting shaft 605 is fixed between the fixing ring and the sliding sleeve 606, a second check block engaged with one side of the first check block 604 is fixed at one end of the sliding sleeve 606, when the first check block 604 rotates in the clockwise direction, it cannot drive the second check block to rotate, when the first check block 604 rotates in the counterclockwise direction, it can drive the second check block to rotate, so that the rotation of the first connecting shaft 506 can drive the second connecting shaft 603 The second vertical plate 602 rotates, thereby driving the third connecting shaft 605 to rotate. The other end of one side of the second vertical plate 602 is provided with a fourth connecting shaft 607 that rotates with the other end of one side of the third vertical plate. The fourth connecting shaft 607 is transmitted and matched with the third connecting shaft 605 through a second synchronous belt and a second synchronous wheel. A second rotating disk 608 is mounted on the surface of the fourth connecting shaft 607. A through hole is provided on one side of the second rotating disk 608. A toggle bar 609 is fixed on one side of the second fixed disk 702. A third rotating disk 610 is contacted on one side of the second rotating disk 608. The third rotating disk 610 is provided on one side of the second fixed disk 702. The outer ring of one side of the disk 610 is fixed with eight evenly distributed first cylindrical pins 611 that are slidably matched with the outer wall of the second rotating disk 608, and the inner ring of one side of the third rotating disk 610 is fixed with eight evenly distributed second cylindrical pins that are intermittently in contact with the toggle bar 609 through the fourth rotating disk 612. The third rotating disk 610 and the fourth rotating disk 612 are both mounted on the second rotating shaft 601, and one end of the second rotating shaft 601 is fixedly matched with the other end of one of the third rotating shafts 704, so that the rotation of the third connecting shaft 605 can drive the second rotating shaft 601 to rotate.

[0037] One end of the second rotating shaft 601 is provided with two symmetrically arranged rotating mechanisms 7 that continuously drive the holding mechanism 4 to rotate. The rotating mechanism 7 includes a first vertical plate 701 fixedly fitted with the outer circle of the bottom inner wall of the equipment box 1. One side of the first vertical plate 701 is fixedly provided with an annular groove 703 through a fixing plate 702. The other side of the first vertical plate 701 is rotatably provided with a third rotating shaft 704. One end of the third rotating shaft 704 passes through the first vertical plate 701 and the fixing plate 702 and is fixedly provided with a first rotating disk 705. Eight connecting rods 706 are fixedly provided on the outer wall of the first rotating disk 705. One end of the connecting rod 706 is rotatably provided with a fourth rotating shaft 707 connected to the holding mechanism 4. One end of the fourth rotating shaft 707 is fixedly provided with a rotating bar 708. One end of the rotating bar 708 is hinged with an arc-shaped slider 709 that is slidably fitted with the inner wall of the annular groove 703. When the first rotating disk 705 rotates, it drives the arc-shaped slider 709 to slide along the annular groove 703, and adjacent two fourth rotating shafts 707 are hinged and matched through a movable rod 710, so that the rotation of the third rotating shaft 704 can drive the fourth rotating shaft 707 to rotate.

[0038] A pre-stack process of a PCB inner layer pre-stack equipment includes the following steps:

[0039] S1: Adsorb a bottom layer material. Drive the stacking plate 513 and the needle-type suction cup 514 to move to the storage box 401 containing the bottom layer material through the movement of the third rack 508 to achieve the purpose of adsorbing the bottom layer material.

[0040] S2: Move the bottom layer material to the conveyor 2. Drive the stacking plate 513 and the needle-type suction cup 514 to move above the conveyor 2 through the movement of the third rack 508 back to the original position to achieve the purpose of moving the bottom layer material to the conveyor 2.

[0041] S3: Position the bottom layer material. Drive the first positioning plate 306 and the second positioning plate 317 to reciprocate through the movement of the moving rod 303 and repeatedly contact the bottom layer material, so as to position the bottom layer material.

[0042] S4: Move the storage box 401 containing the semi-cured sheet to the top position. Drive the second connecting shaft 603 to rotate through the rotation of the third spur gear 509, and then drive the first check block 604 and the second check block to rotate, and then drive the first rotating disk 705 and the connecting rod 706 to rotate to achieve the purpose of moving the storage box 401 containing the semi-cured sheet to the top position.

[0043] S5: Adsorb a semi-cured sheet, repeat S1~S4, move the semi-cured sheet to the bottom layer material, and position it.

[0044] S6: Stack the materials of the second middle layer, the first middle layer, and the top layer on the material of the bottom layer respectively. Repeat S1 - S5 to stack the materials of the bottom layer, the second middle layer, the first middle layer, and the top layer, a total of four layers, together, and there will be a layer of prepreg sandwiched between each layer, thus completing the pre - stacking operation of the entire four - layer PCB board.

[0045] Working principle: When pre - stacking the inner layer of the PCB, place materials (usually in plate form) of four layers, namely multiple top layers, the first middle layer, the second middle layer, and the bottom layer, into four storage bins 401 respectively. And there is an empty storage bin 401 between the storage bins 401 for placing different materials. Multiple prepregs are placed in these storage bins 401 respectively.

[0046] Start the pre - stacking process. In the first step, adsorb a bottom - layer material: Start the first cylinder 507 to extend it by a set distance, drive the third rack 508 to move, and then drive the third spur gear 509 to rotate counter - clockwise half a turn around the first rotating shaft 501, then drive the swing plate 510 to rotate counter - clockwise half a turn around the first rotating shaft 501, then drive the first moving plate 511 and the second moving plate to move from the initial position to above the storage bin 401 at the top. Start the second cylinder 512 to extend it, drive the stacking plate 513, the mounting block, and the needle - type suction cup 514 to move downward until the bottom of the needle - type suction cup 514 contacts the bottom - layer material and tightly adsorbs the bottom - layer material.

[0047] In the second step, move the bottom - layer material to the conveyor 2: Start the first cylinder 507 to shorten it by a set distance, drive the third rack 508 to return to its original position, then drive the third spur gear 509 to rotate clockwise half a turn around the first rotating shaft 501, then drive the swing plate 510 to rotate clockwise half a turn around the first rotating shaft 501, then drive the first moving plate 511 and the second moving plate to return to the initial position, and then drive the bottom - layer material to move to the conveyor 2. The needle - type suction cup 514 removes the suction force, so that the bottom - layer material falls on the conveyor 2.

[0048] The third step is to position the bottom material so that the center position of the bottom material coincides with the center position of the stacking position: the two third air cylinders 302 are respectively started to repeatedly extend and shorten the set distance, drive the fifth fixed block and the moving rod 303 to move, and then drive the first middle plate 304 and the first positioning plate 306 to move, and when the moving rod 303 moves, it drives the fifth rack 309 to move, and then drives the fourth spur gear 311 and the first bevel gear 312 to reciprocate around the first transmission shaft 310, and then drives the fifth spur gear and the second bevel gear to reciprocate around the second transmission shaft 313, and then drives the fourth rack 308, the motor 315 and the connecting block 314 to reciprocate, and then drives the L-shaped connecting strip 316 and the second positioning plate 317 to reciprocate, so that the first positioning plate 306 and the second positioning plate 317 reciprocate and repeatedly contact with the bottom material, thereby positioning the bottom material;

[0049] The fourth step is to move the holding box 401 containing the semi-cured sheet to the top position: in the second step, while the third spur gear 509 rotates half a circle, it drives the transmission gear to rotate one circle with the first connecting shaft 506 as the axis, and then drives the second connecting shaft 603 to rotate, and then drives the first check block 604 and the second check block to rotate one circle, and then drives the third connecting shaft 605 to rotate, and through the transmission action of the second synchronous belt and the second synchronous wheel, drives the second rotating disk 608 and the toggle bar 609 to rotate one circle with the fourth connecting shaft 607 as the center. During the process of the toggle bar 609 rotating one circle, it drives the second cylindrical pin to rotate one eighth of a circle, and then drives the third rotating disk 610 and the fourth rotating disk 612 to rotate one eighth of a circle with the second rotating shaft 601 as the axis, and then drives the first rotating disk 705 and the connecting rod 706 to rotate one eighth of a circle with the third rotating shaft 704 as the axis, and then drives the holding box 401 containing the semi-cured sheet to move to the top position, and the holding box 401 containing the bottom material rotates downward;

[0050] Step 5, adsorbing a prepreg: repeating steps 1 to 4, moving the prepreg to the bottom layer material, positioning it, and driving the container 401 containing the second layer (from bottom to top) of the material to move to the top position;

[0051] Step 6: Stack the materials of the second middle layer, the first middle layer, and the top layer on the material of the bottom layer respectively: Repeat Steps 1 to 5 to stack the materials of the bottom layer, the second middle layer, the first middle layer, and the top layer, a total of four layers, with a prepreg layer sandwiched between each layer, thus completing the pre-stack operation of the entire four-layer PCB. When the next pre-stack process is required, start the motor 315 to rotate it half a turn, driving the round block and the L-shaped connecting bar 316 to rotate half a turn, and then driving the second middle plate and the second positioning plate 317 away from the surface of the conveyor 2. Start the conveyor 2 to rotate a set number of turns, move the pre-stacked inner layer of the PCB to the set position, and vacate the surface of the conveyor 2 below the needle-type suction cup 514 to prepare for the next pre-stack operation.

[0052] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A PCB inner layer pre-stack device, comprising a device box (1), one end of the bottom of the inner wall of the device box (1) is fixedly provided with a conveyor (2) for conveying the pre-stacked PCB inner layer, and it is characterized in that: On both sides of the conveyor (2), positioning mechanisms (3) for positioning the inner layer of the PCB are symmetrically arranged. At the other end of the bottom inner wall of the equipment box (1), eight placing mechanisms (4) for placing the materials of each layer constituting the inner layer of the PCB are provided. On one side of the bottom inner wall of the equipment box (1), a stacking mechanism (5) for pre-stacking the inner layer of the PCB is provided. The stacking mechanism (5) includes a first rotating shaft (501). Below the first rotating shaft (501), a transmission mechanism (6) for transmitting the power of the stacking mechanism (5) is provided. The transmission mechanism (6) includes a second rotating shaft (601). At one end of the second rotating shaft (601), two symmetrically arranged rotating mechanisms (7) for continuously driving the placing mechanism (4) to rotate are provided. The placing mechanism (4) includes a fifth rotating shaft (406) and a placing box (401) fixedly fitted to the other end of the fourth rotating shaft (707). At the centers of the four sides of the inner wall of the placing box (401), two first fixing blocks (402) are fixedly provided on each side. On one side of the first fixing block (402), a first rack (404) is fixedly provided through an electric telescopic rod (403). On the surface of the first rack (404), a first channel-shaped plate fixedly fitted to the surface of the placing box (401) is slidably provided. On one side of the first rack (404), a first spur gear (405) is meshed. The first spur gear (405) is sleeved on the fifth rotating shaft (406). At the top of the fifth rotating shaft (406), a second fixing block fixedly fitted to the top of the side of the inner wall of the placing box (401) is rotatably provided. On the surface of the fifth rotating shaft (406), a second spur gear is sleeved. On one side of the second spur gear, a second rack (407) is meshed. The second rack (407) is fixedly provided with an adjusting plate (409) through a moving block (408). On both sides of the moving block (408), third fixing blocks fixedly fitted to the outer ring of the inner wall of the placing box (401) are symmetrically slidably provided. The stacking mechanism (5) further includes two first L-shaped stabilizing plates (502) fixedly fitted to one side of the bottom inner wall of the equipment box (1). At one end of the first L-shaped stabilizing plate (502), a mounting plate (503) rotatably fitted to the first rotating shaft (501) is fixedly provided. At both ends of one side of the mounting plate (503), a fourth fixing block (504) and a second L-shaped stabilizing plate (505) are respectively fixedly provided. At the top of one side of the mounting plate (503), a second channel-shaped plate is fixedly provided. At the center of one side of the mounting plate (503), a first connecting shaft (506) rotatably fitted to one end of the inner wall of the second L-shaped stabilizing plate (505) is rotatably provided. On one side of the fourth fixing block (504), a third rack (508) slidably fitted to the inner wall of the second channel-shaped plate is fixedly provided through a first air cylinder (507). At the bottom of the third rack (508), a third spur gear (509) sleeved and fitted to the first rotating shaft (501) is meshed. At the bottom of the third spur gear (509), a transmission gear sleeved on the first connecting shaft (506) is meshed.

2. The PCB inner layer pre-stack device according to claim 1, wherein The rotation mechanism (7) includes a first vertical plate (701) fixedly fitted with the outer ring of the bottom inner wall of the equipment box (1). One side of the first vertical plate (701) is fixedly provided with an annular groove (703) through a fixed plate (702). The other side of the first vertical plate (701) rotatably mounts a third rotating shaft (704). One end of the third rotating shaft (704) passes through the first vertical plate (701) and the fixed plate (702) and is fixedly provided with a first rotating disk (705). Eight connecting rods (706) are fixedly provided on the outer wall of the first rotating disk (705). One end of the connecting rod (706) rotatably mounts a fourth rotating shaft (707) connected to the placing mechanism (4). One end of the fourth rotating shaft (707) is fixedly provided with a rotating bar (708). One end of the rotating bar (708) is hinged with an arc-shaped slider (709) slidably fitted with the inner wall of the annular groove (703), and adjacent two of the fourth rotating shafts (707) are hinged and fitted through a movable rod (710).

3. The PCB inner layer pre-stack device according to claim 1, characterized in that, One end of the first rotating shaft (501) passes through the mounting plate (503) and is fixedly provided with a swing plate (510). One side of the swing plate (510) is hinged with a first moving plate (511). The bottom end of the first moving plate (511) is fixedly provided with a second moving plate. The bottom of the second moving plate is fixedly provided with a stacking plate (513) through a plurality of second air cylinders (512). Both ends of the bottom of the stacking plate (513) are symmetrically and fixedly provided with mounting blocks through bolts. A plurality of needle-shaped suction cups (514) are fixedly provided at the bottom of the mounting blocks. A slide rail is fixedly provided on the other side of the mounting plate (503), and a movable block slidably fitted with the surface of the first moving plate (511) is slidably provided on the surface of the slide rail.

4. The inner layer pre-stack device of a PCB according to claim 3, characterized in that, The transmission mechanism (6) further includes a second vertical plate (602) and a third vertical plate fixedly fitted with the inner ring of the bottom inner wall of the equipment box (1). One end of one side of the second vertical plate (602) rotatably mounts a first check block (604) through a second connecting shaft (603). The second connecting shaft (603) is in transmission cooperation with the first connecting shaft (506) through a first synchronous belt and a first synchronous pulley. One side of the third vertical plate rotatably mounts a third connecting shaft (605). A fixed ring is fixedly provided at the center of the third connecting shaft (605). A sliding sleeve (606) is slidably provided at one end of the third connecting shaft (605). A first spring sleeved on the surface of the third connecting shaft (605) is fixedly provided between the fixed ring and the sliding sleeve (606). One end of the sliding sleeve (606) is fixedly provided with a second check block meshed with one side of the first check block (604).

5. The PCB inner layer pre-lamination device according to claim 4, characterized in that, A fourth connecting shaft (607) is rotatably provided at the other end of one side of the second vertical plate (602) and is rotatably matched with the other end of one side of the third vertical plate. The fourth connecting shaft (607) is transmission-matched with the third connecting shaft (605) through a second synchronous belt and a second synchronous wheel. A second rotating disk (608) is sleeved on the surface of the fourth connecting shaft (607). A through hole is provided on one side of the second rotating disk (608). A toggle bar (609) is fixedly provided on one side of the second fixed disk (702). A third rotating disk (610) is contacted with one side of the second rotating disk (608). ), the outer ring of one side of the third rotating disk (610) is fixedly provided with eight evenly distributed first cylindrical pins (611) that are slidably matched with the outer wall of the second rotating disk (608), and the inner ring of one side of the third rotating disk (610) is fixedly provided with eight evenly distributed second cylindrical pins that are intermittently in contact with the toggle bar (609) through the fourth rotating disk (612), and the third rotating disk (610) and the fourth rotating disk (612) are both mounted on the second rotating shaft (601), and one end of the second rotating shaft (601) is fixedly matched with the other end of one of the third rotating shafts (704).

6. The PCB inner layer pre-stack device according to claim 5, characterized in that, The positioning mechanism (3) comprises a third L-shaped stabilizing plate (301) fixedly matched with one side of the conveyor (2); a third cylinder (302) is fixedly installed on the top of one side of the third L-shaped stabilizing plate (301); a moving rod (303) is fixedly provided at the output end of the third cylinder (302) via a fifth fixing block; one end of the moving rod (303) passes through the third L-shaped stabilizing plate (301) and is fixedly provided with a first intermediate plate (304); first through holes are symmetrically provided at both ends of one side of the first intermediate plate (304); a first guide rod (305) is slidably provided in the first through hole; a first positioning plate (306) is fixedly provided at one end of the first guide rod (305); and a second spring sleeved on the first guide rod (305) is fixedly provided between the first intermediate plate (304) and the first positioning plate (306).

7. The PCB inner layer pre-stack device according to claim 6, characterized in that, On one side of the bottom end of the third L-shaped stabilizing plate (301), two third channel-shaped plates (307) are fixedly arranged. A fourth rack (308) is slidably arranged on the inner wall of the third channel-shaped plate (307). A fifth rack (309) is fixedly arranged at the bottom of the moving rod (303). At both ends of one side of the third L-shaped stabilizing plate (301), mounting blocks are symmetrically and fixedly arranged. A first transmission shaft (310) is rotatably arranged between the two mounting blocks. A fourth spur gear (311) meshing with the bottom of the fifth rack (309) is sleeved at the center of the first transmission shaft (310). First bevel gears (312) are sleeved at both ends of the first transmission shaft (310) through the mounting blocks. Two second transmission shafts (313) are symmetrically and rotatably arranged on the outer ring of one side of the third L-shaped stabilizing plate (301). A second bevel gear meshing with the first bevel gear (312) is sleeved at one end of the second transmission shaft (313). A fifth spur gear meshing with the top of the fourth rack (308) is sleeved at the center of the second transmission shaft (313). One end of the fourth rack (308) is fixedly installed with a motor (315) through a connecting block (314). An installation groove is formed at the top of the connecting block (314). The output end of the motor (315) passes through the connecting block (314) and is fixedly provided with a round block rotatably matched with the installation groove. A second intermediate plate is fixedly arranged at the top of the round block through an L-shaped connecting bar (316). Second through holes are symmetrically formed at both ends of one side of the second intermediate plate. Second guide rods are slidably arranged in the second through holes. A second positioning plate (317) is fixedly arranged at one end of each second guide rod. A third spring sleeved on the second guide rod is fixedly arranged between the second intermediate plate and the second positioning plate (317).

8. The pre-stack process of a PCB inner layer pre-stack device according to any one of claims 1-7, characterized in that, It includes the following steps: S1: Adsorb a bottom layer material. Drive the stacking plate (513) and the needle suction cup (513) to move onto the storage box (401) containing the bottom layer material by the movement of the third rack (508). S2: Move the bottom layer material onto the conveyor (2). Drive the stacking plate (513) and the needle suction cup (513) to move above the conveyor (2) by the movement of the third rack (508) back to the original position. S3: Position the bottom layer material. Drive the first positioning plate (306) and the second positioning plate (317) to reciprocate by the movement of the moving rod (303), and repeatedly contact the bottom layer material. S4: Move the storage box (401) containing the semi-cured sheet to the top position. Drive the second connecting shaft (603) to rotate by the rotation of the third spur gear (509), and then drive the first check block (604) and the second check block to rotate, and then drive the first rotating disk (705) and the connecting rod (706) to rotate, so as to achieve the purpose of moving the storage box (401) containing the semi-cured sheet to the top position. S5: Adsorb a semi-cured sheet. Repeat S1~S4, move the semi-cured sheet onto the bottom layer material, and position it. S6: Stack the materials of the second middle layer, the first middle layer, and the top layer on the material of the bottom layer respectively. Repeat S1 - S5 to stack the materials of the bottom layer, the second middle layer, the first middle layer, and the top layer, a total of four layers, together, with a layer of prepreg sandwiched between each layer, thus completing the pre - stacking operation of the entire four - layer PCB board.

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