A printed circuit board oven

Abstract

The present invention discloses a printed circuit board oven, belonging to the field of ovens, which includes a frame body, a heating chamber, a housing assembly, a conveying member and a feeding assembly. The heating chamber is fixed at the bottom of the frame body, the housing assembly is fixed at the top of the frame body, the conveying member is arranged inside the frame body, and the feeding assembly is fixed at the bottom end of one side surface of the frame body. A heating cavity is fixedly connected inside the heating chamber, and a heating coil is fixedly connected to the bottom end surface of the heating cavity. The housing assembly includes an inner cover plate, an outer cover plate, two inner side plates and two outer side plates. The two inner side plates are fixed on both sides of the top of the frame body of the printed circuit board oven housing, and the two outer side plates are respectively fixed on the outer sides of the two inner side plates. The inner cover plate is fixed at the top ends of the two inner side plates and fits with their edges. With the series of structures provided in the present invention, the degree of automation is improved and the baking speed is accelerated to solve the problems raised in the above-mentioned background technology.

Description

Technical Field

[0001] The present invention relates to an oven, in particular to a printed circuit board oven. Background Art

[0002] A printed circuit board (PCB) is formed by printing the required circuit layout on a multi-layer board body, then laminating the multi-layer boards to form a circuit board body. Then, a layer of ink containing a solvent (or called insulating green paint) must be coated on the surface of the board body and placed in a dedicated oven for drying to volatilize the solvent in the ink layer of the board body to achieve the drying effect.

[0003] Existing PCB ovens have the following problems: low degree of automation and low baking speed. Therefore, those skilled in the art have provided a printed circuit board oven to solve the problems raised in the above background art. Summary of the Invention

[0004] The purpose of the present invention is to provide a printed circuit board oven, which improves the degree of automation and speeds up the baking speed through a series of structures provided, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A printed circuit board oven includes a frame body, a heating box, a housing assembly, a conveying member and a feeding assembly. The heating box is fixed at the bottom of the frame body, the housing assembly is fixed at the top of the frame body, the conveying member is arranged inside the frame body, and the feeding assembly is fixed at the bottom end of one side of the frame body.

[0007] Through a series of structures provided, the degree of automation is improved and the baking speed is accelerated to solve the problems raised in the above background art.

[0008] As a further scheme of the present invention: a heating cavity is fixedly connected inside the heating box, and a heating coil is fixedly connected to the bottom end face of the heating cavity.

[0009] During use, the heating coil in the heating cavity is energized to generate heat, and then the PCB board above is baked.

[0010] As a further scheme of the present invention: the housing assembly includes an inner cover plate, an outer cover plate, two inner side plates and two outer side plates. The two inner side plates are fixed on both sides of the top of the frame body of the printed circuit board oven, the two outer side plates are respectively fixed on the outer sides of the two inner side plates, the inner cover plate is fixed at the top ends of the two inner side plates and fits with its edge, and the outer cover plate is fixed at the top ends of the two outer side plates and fits with its edge.

[0011] When in use, the inner cover plate and the two inner side plates form an inner shell, while the outer cover plate and the two outer side plates form an outer shell. The coordinated use of the inner and outer shells can improve thermal efficiency.

[0012] As a further scheme of the present invention: the feeding assembly includes a bottom plate fixed to one side of the bottom end of the heating box, and a rotating seat is fixedly connected to the middle position of the top end of the bottom plate, a lifting plate is provided above the rotating seat, and a threaded seat is fixedly connected to the middle position of one side of the lifting plate, a threaded rod is vertically penetrated and threadedly connected to the threaded seat, and the bottom end of the threaded rod penetrates the rotating seat, and the upper and lower guide seats are fixedly connected on both sides of the threaded seat, and a guide rod is penetrated inside the upper and lower guide seats, the bottom end of the guide rod is fixedly connected to the top end of the bottom plate, and the other side of the lifting plate is fixedly connected to a supporting frame, and the supporting frame extends from a groove opened in the side wall of the heating box, and a first motor is fixedly connected to the lower part of the extending supporting frame, and a coupling is connected to the output end of the first motor, the coupling and the bottom end of the threaded rod penetrating the rotating seat are driven by a first belt gear transmission mechanism, and a plurality of PCB boards stacked up and down are placed on the top surface of the supporting frame.

[0013] When in use, multiple PCB boards are stacked up and placed on the support rack. After the material taking assembly takes away a PCB board, the first motor runs, and drives the threaded rod to rotate a certain angle through the coupling and the first belt gear transmission mechanism, and the threaded seat is fixedly connected to the lifting plate. Due to the guiding and limiting effect of the upper and lower guide seats and the guide rod, the threaded seat and the lifting plate follow the rotation of the threaded rod and move up a certain height. Subsequently, the topmost PCB board on the support rack reaches the height of the PCB board that was taken away before.

[0014] As a further solution of the present invention: the conveying component includes a material picking component, a transfer material turning component and a material discharging component, the transfer material turning component is arranged inside the frame body of the printed circuit board oven, the material picking component is arranged on one side of the transfer material turning component, and the material discharging component is arranged on the other side of the transfer material turning component.

[0015] When in use, the material taking component sucks the PCB board and transfers it to the transfer turning component. After multiple flips by the transfer turning component, the PCB board is transferred to the discharging component for output.

[0016] As a further solution of the present invention: the material picking assembly includes an upper fixed plate arranged on one side of the transfer turning assembly, and a lower fixed plate is arranged below the upper fixed plate, the side of the lower fixed plate is movably connected with a main feed roller and an auxiliary feed roller arranged in parallel up and down, and one end of the main feed roller is fixedly connected to a second motor, one end of the auxiliary feed roller is fixedly connected to a photoelectric sensor, the top end surface of the upper fixed plate is fixedly connected to at least two telescopic rods in parallel, and the output end of the telescopic rod is fixedly connected to a vacuum suction cup.

[0017] When in use, the telescopic rod runs, and the vacuum suction cup moves downward with the output end of the telescopic rod until the vacuum suction cup contacts a PCB board. At this time, the vacuum suction cup adsorbs and fixes the PCB board, and then the telescopic rod runs again to move the PCB board upward between the main feed roller and the auxiliary feed roller. At the same time, the photoelectric sensor senses the arrival of the PCB board and sends a signal to the second motor. After receiving the signal, the second motor runs to drive the main feed roller to rotate, and the rotating main feed roller cooperates with the auxiliary feed roller to slowly guide the PCB board into the shell assembly.

[0018] As a further solution of the present invention: the transfer turning assembly includes two movable shaft seats respectively arranged on both sides of the frame body, a rotating shaft passes through and is rotatably connected between the two movable shaft seats, and the outer side of the rotating shaft is fixedly connected to a turning mechanism, one side of the turning mechanism is fixedly connected to a transfer mechanism, a protective box is arranged on the outside of one end of the rotating shaft, and a third motor is fixedly connected to the inside of the protective box, and the third motor is connected to one end of the rotating shaft through a second belt gear transmission mechanism.

[0019] During use, after the PCB board is slowly introduced into the shell assembly, the PCB board falls on the transfer mechanism, and enters the flipping mechanism after being transferred by the transfer mechanism. After a certain period of time, the third motor runs, and drives the rotating shaft to rotate through the second belt gear transmission mechanism, thereby driving the flipping mechanism to rotate and flip the PCB board to a certain angle. After multiple flips, the PCB board is flipped to the discharge assembly.

[0020] As a further solution of the present invention: the flipping mechanism includes multiple groups of limit rods arranged in a circle and fixed on the outer side of the rotating shaft, the number of limit rods in each group is several, and the transfer mechanism includes several feed guide rails fixed on one side of the flipping mechanism, and each group of several limit rods and several feed guide rails are staggered.

[0021] After the PCB board falls on the feed guide rail of the transfer mechanism, it slides down on a group of limit rods under the action of gravity. When the flip mechanism rotates, the PCB boards on different groups of limit rods rotate accordingly. During the rotation process, different groups of limit rods can pass through the gaps in the feed guide rail.

[0022] As a further solution of the present invention: the discharging assembly includes a discharging box body arranged on the other side of the transfer turning assembly, and the interior of the discharging box body is hollow, and a plurality of fixed side panels placed in parallel are fixedly connected to the interior of the discharging box body, and the interior of the plurality of fixed side panels is movably connected with a driven shaft, one side of the driven shaft is movably connected with a driving shaft, and a fourth motor is arranged under the driving shaft, the output end of the fourth motor is connected to the driving shaft through a third belt gear transmission mechanism, and the driving shaft and the driven shaft are connected through a gear transmission, and the outer side of the driven shaft is connected to a plurality of transmission belts through a gear transmission.

[0023] During use, when the PCB board is flipped onto the discharging assembly, the PCB board lands on the top surfaces of several conveyor belts. Due to the obstruction of the several conveyor belts, the PCB board cannot continue to flip with the flipping mechanism. Each group of the limiting rods for sending out the PCB board reaches a position aligned with several feeding guide rails after multiple flips, thus facilitating the reception of the PCB board next time. After the PCB board lands on the several conveyor belts, the fourth motor is started. The fourth motor drives the driving shaft to rotate through the third belt gear transmission mechanism, and then drives the driven shaft to rotate accordingly. The several conveyor belts are driven to rotate through the gears, and thus the PCB boards on the several conveyor belts are sent out.

[0024] As a further scheme of the present invention: control consoles are fixedly connected to one side surface of the heating box and both sides of the feeding assembly, and a control panel is fixedly connected to the top end of one of the control consoles.

[0025] During use, the staff can control the operating state of the printed circuit board oven through the control panel on the control console.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] Through a series of structures provided, the degree of automation is improved and the baking speed is accelerated. In addition, the present invention simplifies the putting-in and taking-out of the PCB board, and the internal structure can prevent the PCB boards from stacking together, which can effectively improve the baking efficiency of the PCB board. This oven has a simple structure, low cost, high baking efficiency, good baking effect, and wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of a printed circuit board oven;

[0029] Figure 2 It is an exploded view of a printed circuit board oven;

[0030] Figure 3 It is an internal view of the housing assembly in a printed circuit board oven;

[0031] Figure 4 It is a combined view of the rotating shaft and the second belt gear transmission mechanism in a printed circuit board oven;

[0032] Figure 5 It is a schematic diagram of the structure of the feeding assembly in a printed circuit board oven;

[0033] Figure 6 It is a schematic diagram of the structure of the material taking assembly in a printed circuit board oven;

[0034] Figure 7It is a schematic structural diagram of a discharging component in a printed circuit board oven;

[0035] Figure 8 It is a flowchart of a method for controlling the baking of printed circuit boards.

[0036] In the figure: 1. Frame body; 2. Heating box; 201. Heating chamber; 202. Heating coil; 3. Housing assembly; 301. Inner side plate; 302. Outer side plate; 303. Inner cover plate; 304. Inner discharging port; 305. Inner feeding port; 306. Outer cover plate; 307. Outer discharging port; 308. Outer feeding port; 4. Material taking assembly; 401. Upper fixing plate; 402. Lower fixing plate; 403. Telescopic rod; 404. Vacuum sucker; 405. Auxiliary feeding roller; 406. Main feeding roller; 407. Second motor; 408. Photoelectric inductor; 5. Feeding assembly; 501. First motor; 502. Coupling; 503. First belt and gear transmission mechanism; 504. Material supporting frame; 505. Bottom plate; 506. Rotary seat; 507. Threaded rod; 508. Threaded seat; 509. Lifting plate; 5010. Upper and lower guiding seats; 5011. Guide rod; 6. Console; 7. Control panel; 8. PCB board; 9. Transfer and turning assembly; 901. Movable shaft seat; 902. Rotating shaft; 903. Turning mechanism; 904. Protection box; 905. Third motor; 906. Second belt and gear transmission mechanism; 907. Transfer mechanism; 10. Discharging assembly; 1001. Discharging box body; 1002. Fourth motor; 1003. Driving shaft; 1004. Driven shaft; 1005. Conveyor belt; 1006. Fixed side plate; 1007. Third belt and gear transmission mechanism. Detailed implementation manners

[0037] The embodiments of the present invention will be described in detail below. These embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments.

[0038] Please refer to Figures 1 - 8 , in an embodiment of the present invention, a printed circuit board oven includes a frame body 1, a heating box 2, a housing assembly 3, a conveying member and a feeding assembly 5. The heating box 2 is fixed to the bottom of the frame body 1, the housing assembly 3 is fixed to the top of the frame body 1, the conveying member is arranged inside the frame body 1, and the feeding assembly 5 is fixed to the bottom end of one side surface of the frame body 1. Through a series of structures provided, the degree of automation is improved and the baking speed is accelerated.

[0039] In Figure 3 : Inside the heating box 2, a heating chamber 201 is fixedly connected, and a heating coil 202 is fixedly connected to the bottom end surface of the heating chamber 201. During use, the heating coil 202 in the heating chamber 201 is energized to generate heat, thereby baking the PCB board 8 above.

[0040] In Figure 2 : The housing assembly 3 includes an inner cover plate 303, an outer cover plate 306, two inner side plates 301 and two outer side plates 302. The two inner side plates 301 are fixed on both sides of the top of the frame body 1 of the printed circuit board oven housing. The two outer side plates 302 are respectively fixed on the outer sides of the two inner side plates 301. The inner cover plate 303 is fixed at the top ends of the two inner side plates 301 and fits with its edges. The outer cover plate 306 is fixed at the top ends of the two outer side plates 302 and fits with its edges. When in use, the inner cover plate 303 and the two inner side plates 301 form an inner housing, and the outer cover plate 306 and the two outer side plates 302 form an outer housing. The combined use of the inner and outer housings can improve the thermal efficiency.

[0041] In this embodiment: One side of the inner cover plate 303 is provided with an inner feed port 305, and the other side of the inner cover plate 303 is provided with an inner discharge port 304. One side of the outer cover plate 306 is provided with an outer feed port 308 aligned with the inner feed port 305, and the other side of the outer cover plate 306 is provided with an outer discharge port 307 aligned with the inner discharge port 304. The combined use of the outer feed port 308 and the inner feed port 305 facilitates the entry of the PCB board 8 into the interior of the housing assembly 3, and the combined use of the outer discharge port 307 and the inner discharge port 304 facilitates the export of the PCB board 8 from the housing assembly 3.

[0042] In this embodiment: The edges of the inner side plates 301 are provided with chamfers. This setting causes a certain gap between the inner housing and the outer housing. The air in the gap has low thermal conductivity, so that the heat inside the inner housing will not dissipate quickly, thereby improving the thermal efficiency.

[0043] In this embodiment: Both the inner side plates 301 and the inner cover plate 303 are made of heat-reflective materials. This setting can improve the heat insulation of the inner housing, thereby improving the thermal efficiency.

[0044] In Figure 5Middle: The feeding assembly 5 includes a bottom plate 505 fixed to one side of the bottom end of the heating box 2, and a rotating seat 506 is fixedly connected to the middle position of the top of the bottom plate 505, a lifting plate 509 is provided above the rotating seat 506, and a threaded seat 508 is fixedly connected to the middle position of one side of the lifting plate 509, a threaded rod 507 is vertically penetrated and threadedly connected inside the threaded seat 508, and the bottom end of the threaded rod 507 penetrates the rotating seat 506, and upper and lower guide seats 5010 are fixedly connected on both sides of the threaded seat 508, and guide rods 5011 are penetrated inside the upper and lower guide seats 5010 The bottom end of the guide rod 5011 is fixedly connected to the top of the base plate 505, and the other side of the lifting plate 509 is fixedly connected to a support rack 504, and the support rack 504 extends from a slot provided in the side wall of the heating box 2, and a first motor 501 is fixedly connected to the lower part of the extended part of the support rack 504, and a coupling 502 is connected to the output end of the first motor 501, and the coupling 502 is connected to the bottom end of the threaded rod 507 passing through the rotating seat 506 through a first belt gear transmission mechanism 503, and a plurality of PCB boards 8 stacked up and down are placed on the top surface of the support rack 504. When in use, multiple PCB boards 8 are stacked up and placed on the support rack 504. After the material taking component 4 takes away a PCB board 8, the first motor 501 runs, and drives the threaded rod 507 to rotate a certain angle through the coupling 502 and the first belt gear transmission mechanism 503, and the threaded seat 508 is fixedly connected to the lifting plate 509. Due to the guiding and limiting effect of the upper and lower guide seats 5010 and the guide rod 5011, the threaded seat 508 and the lifting plate 509 follow the rotation of the threaded rod 507 and move up a certain height. Subsequently, the topmost PCB board 8 on the support rack 504 reaches the height of the PCB board 8 that was taken away before.

[0045] exist Figure 4 Middle: The conveying component includes a material taking component 4, a transfer material turning component 9 and a material discharging component 10. The transfer material turning component 9 is arranged inside the frame body 1 of the printed circuit board oven, the material taking component 4 is arranged on one side of the transfer material turning component 9, and the material discharging component 10 is arranged on the other side of the transfer material turning component 9. When in use, the material taking component 4 absorbs the PCB board 8 and transmits it to the transfer material turning component 9. After multiple flips of the transfer material turning component 9, the PCB board 8 is transferred to the material discharging component 10 for output.

[0046] exist Figure 6Middle: The material picking component 4 includes an upper fixed plate 401 arranged on one side of the transfer turning component 9, and a lower fixed plate 402 is arranged below the upper fixed plate 401, and the side of the lower fixed plate 402 is movably connected with a main feed roller 406 and an auxiliary feed roller 405 arranged in parallel up and down, and one end of the main feed roller 406 is fixedly connected to a second motor 407, and one end of the auxiliary feed roller 405 is fixedly connected to a photoelectric sensor 408, and the top surface of the upper fixed plate 401 is fixedly connected to at least two telescopic rods 403 in parallel, and the output end of the telescopic rod 403 is fixedly connected to a vacuum suction cup 404. When in use, the telescopic rod 403 runs, and the vacuum suction cup 404 moves downward following the output end of the telescopic rod 403 until the vacuum suction cup 404 contacts a PCB board 8. At this time, the vacuum suction cup 404 adsorbs and fixes the PCB board 8. Then, the telescopic rod 403 runs again to move the PCB board 8 upward between the main feed roller 406 and the auxiliary feed roller 405. At the same time, the photoelectric sensor 408 senses the arrival of the PCB board 8 and sends a signal to the second motor 407. After receiving the signal, the second motor 407 runs to drive the main feed roller 406 to rotate, and the rotating main feed roller 406 cooperates with the auxiliary feed roller 405 to slowly introduce the PCB board 8 into the shell assembly 3.

[0047] exist Figure 2 and Figure 3 The transfer and turning assembly 9 includes two movable shaft seats 901 respectively arranged on both sides of the interior of the frame body 1, a rotating shaft 902 is passed through and rotatably connected between the two movable shaft seats 901, and a turning mechanism 903 is fixedly connected to the outer side of the rotating shaft 902, a transfer mechanism 907 is fixedly connected to one side of the turning mechanism 903, a protective box 904 is arranged outside one end of the rotating shaft 902, and a third motor 905 is fixedly connected inside the protective box 904, and the third motor 905 is connected to one end of the rotating shaft 902 through a second belt gear transmission mechanism 906. When in use, after the PCB board 8 is slowly introduced into the interior of the housing assembly 3, the PCB board 8 falls on the transfer mechanism 907, and enters the turning mechanism 903 through the transfer of the transfer mechanism 907. After a certain period of time, the third motor 905 runs, drives the rotating shaft 902 to rotate through the second belt gear transmission mechanism 906, and then drives the turning mechanism 903 to rotate to turn the PCB board 8 to a certain angle. After multiple turns, the PCB board 8 is turned over to the discharge assembly 10.

[0048] exist Figure 3In the middle: The flipping mechanism 903 includes multiple groups of limiting rods fixedly arranged on the outer side surface of the rotating shaft 902 in a circular arrangement. The number of limiting rods in each group is several. The transfer mechanism 907 includes several feeding guide rails fixed on one side of the flipping mechanism 903. There is an alternating arrangement between each group of several limiting rods and the several feeding guide rails. After the PCB board 8 lands on the feeding guide rails of the transfer mechanism 907, it slides down onto a group of limiting rods under the action of gravity. When the flipping mechanism 903 rotates, the PCB boards 8 on different groups of limiting rods all rotate accordingly. During the rotation process, the different groups of limiting rods can all pass through the gaps of the feeding guide rails.

[0049] In this embodiment: The rotating shaft 902 rotates in the direction from the material taking assembly 4 to the discharging assembly 10. During the rotation of the rotating shaft 902, it drives the flipping mechanism 903 to rotate, thereby driving the PCB board 8 to flip. And during the flipping process of the PCB board 8, it flaps like a fan, thereby accelerating the air flow speed in the inner shell, and further improving the thermal efficiency.

[0050] In Figure 7 In the middle: The discharging assembly 10 includes a discharging box body 1001 arranged on the other side of the transfer and flipping assembly 9. The interior of the discharging box body 1001 is hollow. A plurality of fixedly arranged side plates 1006 placed side by side are fixedly connected inside the discharging box body 1001. A driven shaft 1004 is movably connected inside the plurality of side plates 1006. One side of the driven shaft 1004 is movably connected to a driving shaft 1003. And a fourth motor 1002 is arranged below the driving shaft 1003. The output end of the fourth motor 1002 is in transmission connection with the driving shaft 1003 through a third belt and gear transmission mechanism 1007. And there is a gear transmission connection between the driving shaft 1003 and the driven shaft 1004. A plurality of conveyor belts 1005 are in gear transmission connection on the outer side surface of the driven shaft 1004. There is an alternating arrangement between the plurality of conveyor belts 1005 and each group of several limiting rods. When in use, when the PCB board 8 is flipped onto the discharging assembly 10, the PCB board 8 lands on the top surfaces of the plurality of conveyor belts 1005. Due to the obstruction of the plurality of conveyor belts 1005, the PCB board 8 cannot continue to flip following the flipping mechanism 903. And each group of limiting rods for sending out the PCB board 8 reach the position aligned with the several feeding guide rails after multiple flips, thereby facilitating receiving the PCB board 8 next time. After the PCB board 8 lands on the plurality of conveyor belts 1005, the fourth motor 1002 is started. The fourth motor 1002 drives the driving shaft 1003 to rotate through the third belt and gear transmission mechanism 1007, thereby driving the driven shaft 1004 to rotate accordingly. And the plurality of conveyor belts 1005 are driven to rotate through gears, thereby sending out the PCB boards 8 on the plurality of conveyor belts 1005.

[0051] In this embodiment: The plurality of conveyor belts 1005 are arranged horizontally, and this arrangement is convenient for better receiving the PCB board 8.

[0052] In this embodiment: The horizontal extension line of the conveyor belt 1005 intersects the rotating shaft 902, and the top extension line of the feeding guide rail also intersects the rotating shaft 902 and forms an angle greater than 90° and less than 180° with the conveyor belt 1005.

[0053] In Figure 1 : On one side of the heating box 2 and both sides of the feeding assembly 5, control consoles 6 are fixedly connected. On the top of one control console 6, a control panel 7 is fixedly connected. During use, the staff can control the operating state of the printed circuit board oven through the control panel 7 on the control console 6.

[0054] The working principle of the present invention is as follows: During use, first, a plurality of PCB boards 8 are stacked up and down on the material supporting rack 504. Then, the telescopic rod 403 operates, and the vacuum suction cup 404 moves downward along with the output end of the telescopic rod 403 until the vacuum suction cup 404 contacts a PCB board 8. At this time, the vacuum suction cup 404 adsorbs and fixes the PCB board 8. Subsequently, the telescopic rod 403 operates again to move the PCB board 8 upward to between the main feeding roller 406 and the auxiliary feeding roller 405. At the same time, the photoelectric sensor 408 senses the arrival of the PCB board 8 and sends a signal to the second motor 407. After receiving the signal, the second motor 407 operates to drive the main feeding roller 406 to rotate, and the rotating main feeding roller 406 cooperates with the auxiliary feeding roller 405 to slowly guide the PCB board 8 into the housing assembly 3. Finally, the material taking assembly 4 transfers the PCB board 8 to the transfer and turning assembly 9. After being turned over by the transfer and turning assembly 9 multiple times, the PCB board 8 is conducted to the discharging assembly 10 for output.

[0055] Among them, the specific working process of the transfer and turning assembly 9 is as follows: After the PCB board 8 is slowly guided into the housing assembly 3, the PCB board 8 falls on the transfer mechanism 907 and enters the turning mechanism 903 through the transfer of the transfer mechanism 907. After a certain period of time, the third motor 905 operates, drives the rotating shaft 902 to rotate through the second belt and gear transmission mechanism 906, and then drives the turning mechanism 903 to rotate to turn the PCB board 8 by a certain angle. After being turned over multiple times, the PCB board 8 is turned over to the discharging assembly 10. During this process, after the PCB board 8 falls on the feeding guide rail of the transfer mechanism 907, it slides down onto a set of limiting rods under the action of gravity. When the turning mechanism 903 rotates, the PCB boards 8 on different sets of limiting rods all rotate accordingly. During the rotation process, different sets of limiting rods can all pass through the gaps of the feeding guide rail.

[0056] The specific working process of the discharging component 10 is as follows: When the PCB board 8 is flipped onto the discharging component 10, the PCB board 8 lands on the top surfaces of a plurality of conveyor belts 1005. Due to the obstruction of the plurality of conveyor belts 1005, the PCB board 8 cannot continue to flip with the flipping mechanism 903. Each group of limiting rods for sending out the PCB board 8 reaches a position aligned with a plurality of feeding guide rails after multiple flips, thereby facilitating the reception of the PCB board 8 next time. After the PCB board 8 lands on the plurality of conveyor belts 1005, the fourth motor 1002 is started. The fourth motor 1002 drives the driving shaft 1003 to rotate through the third belt and gear transmission mechanism 1007, and then drives the driven shaft 1004 to rotate accordingly. The plurality of conveyor belts 1005 are driven to rotate by gears, and thus the PCB board 8 on the plurality of conveyor belts 1005 is sent out.

[0057] Figure 8 The figure shows a schematic diagram of an embodiment of the printed circuit board baking control method of the present invention. As shown in the figure, the printed circuit board baking control method of this embodiment includes the following steps:

[0058] S1: Stacking materials, stacking a plurality of PCB boards 8 vertically on the material supporting frame 504 until the topmost PCB board 8 reaches the height H;

[0059] S2: Setting parameters, setting parameters on the control panel 7 of the console 6;

[0060] S3: Picking up materials, every interval of time t1, the telescopic rod 403 extends, and the vacuum chuck 404 adsorbs and fixes the topmost PCB board 8. The telescopic rod 403 retracts to convey the PCB board 8 between the main feeding roller 406 and the auxiliary feeding roller 405;

[0061] S4: Feeding materials, when the photoelectric inductor 408 senses the arrival of the PCB board 8, the second motor 407 is started, and the main feeding roller 406 rotates. The rotating main feeding roller 406 cooperates with the auxiliary feeding roller 405 to slowly introduce the PCB board 8 into the housing assembly 3;

[0062] S5: Baking and flipping, after the PCB board 8 lands on the feeding guide rail of the transfer mechanism 907, it slides down onto a group of limiting rods under the action of gravity. Every interval of time t2, the third motor 905 operates, drives the rotating shaft 902 to rotate through the second belt and gear transmission mechanism 906, and then drives the flipping mechanism 903 to rotate to flip the PCB board 8 by a certain angle. After a time t3, the PCB board 8 is flipped onto the discharging component 10;

[0063] S6: Discharging. After the PCB board 8 lands on the top surfaces of several conveyor belts 1005, while the third motor 905 is running, the fourth motor 1002 is started. The fourth motor 1002 drives the driving shaft 1003 to rotate through the third belt gear transmission mechanism 1007, and then drives the driven shaft 1004 to rotate accordingly. The rotation of the gears drives several conveyor belts 1005 to rotate accordingly, and then the PCB boards 8 on the several conveyor belts 1005 are sent out.

[0064] In this embodiment: In S2, the parameters are set through the control panel 7 of the console 6.

[0065] In this embodiment: In S2, the parameters include t1, t2, t3, and the energizing current of the heating coil 202. The baking temperature of the oven is adjusted by adjusting the energizing current of the heating coil 202.

[0066] In this embodiment: t1 = t2, t3 = n * t1, where n is a positive integer.

[0067] In this embodiment: The horizontal extension line of the conveyor belt 1005 intersects the rotating shaft 902, and the top extension line of the feeding guide rail also intersects the rotating shaft 902 and the included angle with the conveyor belt 1005 is greater than 90° and less than 180°.

[0068] In this embodiment: In S3, after the material is taken, the first motor 501 runs, drives the threaded rod 507 to rotate a certain angle through the coupling 502 and the first belt gear transmission mechanism 503. The thread seat 508 and the lifting plate 509 move up a certain height following the rotation of the threaded rod 507, and the PCB board 8 at the topmost of the material supporting frame 504 reaches the height H of the previously taken PCB board 8. This setting ensures that the next material taking can be carried out normally.

[0069] In this embodiment: In S6, after the discharging is completed, the limiting rod reaches the position aligned with several feeding guide rails after a certain period of flipping. This setting ensures that the next PCB board 8 can land on the empty limiting rod.

[0070] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A printed circuit board oven, characterized in that, It includes a frame body, a heating box, a housing assembly, a conveying member and a feeding assembly. The heating box is fixed to the bottom of the frame body. The housing assembly is fixed to the top of the frame body. The conveying member is arranged inside the frame body. The feeding assembly is fixed to the bottom end of one side of the frame body. Inside the heating box, a heating cavity is fixedly connected, and a heating coil is fixedly connected to the bottom end face of the heating cavity. The housing assembly includes an inner cover plate, an outer cover plate, two inner side plates and two outer side plates. The two inner side plates are fixed to both sides of the top of the frame body of the printed circuit board oven housing. The two outer side plates are respectively fixed to the outer sides of the two inner side plates. The inner cover plate is fixed to the top ends of the two inner side plates and fits with their edges. The outer cover plate is fixed to the top ends of the two outer side plates and fits with their edges. The feeding assembly includes a bottom plate fixed to the bottom end of one side of the frame body. In the middle position at the top end of the bottom plate, a rotating seat is fixedly connected. Above the rotating seat, there is a lifting plate. In the middle position of one side face of the lifting plate, a threaded seat is fixedly connected. A threaded rod vertically penetrates and is threadedly connected inside the threaded seat. The bottom end of the threaded rod penetrates the rotating seat. On both sides of the threaded seat, upper and lower guiding seats are fixedly connected. A guiding rod is arranged inside the upper and lower guiding seats. The bottom end of the guiding rod is fixedly connected to the top end of the bottom plate. On the other side face of the lifting plate, a material supporting frame is fixedly connected. The material supporting frame extends out from the slot opened on the side wall of the heating box. Below the extended part of the material supporting frame, a first motor is fixedly connected. The output end of the first motor is connected with a coupling. Between the coupling and the bottom end of the threaded rod penetrating the rotating seat, it is driven by a first belt and gear transmission mechanism. On the top end face of the material supporting frame, a plurality of PCB boards stacked up and down are placed. The conveying member includes a material taking assembly, a transfer and turning assembly and a discharging assembly. The transfer and turning assembly is arranged inside the frame body of the printed circuit board oven. The material taking assembly is arranged on one side of the transfer and turning assembly. The discharging assembly is arranged on the other side of the transfer and turning assembly. The material taking assembly includes an upper fixing plate arranged on one side of the transfer and turning assembly. Below the upper fixing plate, a lower fixing plate is arranged. On the side face of the lower fixing plate, a main feeding roller and a sub-feeding roller arranged side by side up and down are movably connected. One end of the main feeding roller is fixedly connected with a second motor. One end of the sub-feeding roller is fixedly connected with a photoelectric sensor. On the top end face of the upper fixing plate, at least two telescopic rods are fixedly connected side by side. The output end of the telescopic rod is fixedly connected with a vacuum suction cup. The transfer and turning assembly includes two movable shaft seats respectively arranged on both sides inside the frame body. A rotating shaft penetrates and is rotatably connected between the two movable shaft seats. On the outer side face of the rotating shaft, a turning mechanism is fixedly connected. On one side of the turning mechanism, a transfer mechanism is fixedly connected. Outside one end of the rotating shaft, a protective box is arranged. Inside the protective box, a third motor is fixedly connected. Between the third motor and one end of the rotating shaft, it is driven by a second belt and gear transmission mechanism. On one side face of the heating box and on both sides of the feeding assembly, a control console is fixedly connected. On the top end of one control console, a control panel is fixedly connected.

2. The printed circuit board oven according to claim 1, characterized in that, The flipping mechanism includes multiple groups of limiting rods fixedly arranged on the outer side of the rotating shaft in a circular arrangement. The number of limiting rods in each group is several. The transfer mechanism includes several feeding guide rails fixed on one side of the flipping mechanism. There is an alternating arrangement between each group of several limiting rods and several feeding guide rails.

3. A printed circuit board oven according to claim 1, characterized in that, The discharging assembly includes a discharging box body arranged on the other side of the transfer and flipping assembly. The interior of the discharging box body is hollow. A plurality of fixedly arranged side plates placed side by side are fixedly connected inside the discharging box body. A driven shaft is movably connected inside the plurality of fixedly arranged side plates. One side of the driven shaft is movably connected to a driving shaft. A fourth motor is arranged below the driving shaft. The output end of the fourth motor is drivingly connected to the driving shaft through a third belt and gear transmission mechanism. The driving shaft and the driven shaft are drivingly connected through gears. Several conveyor belts are drivingly connected to the outer side of the driven shaft through gears.

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