A printed circuit board processing and drying machine

Abstract

This utility model provides a printed circuit board (PCB) processing dryer, relating to the field of PCB drying technology. The dryer includes a drying chamber with an inlet pipe and an outlet pipe on both sides. A recovery pipe is connected to the middle of the outlet pipe, and a fan is installed on the recovery pipe. A return air pipe is located at the top of the drying chamber, and fans are installed on both the recovery pipe and the return air pipe. The ends of the return air pipe and the recovery pipe furthest from the drying chamber are connected to a recovery tank. A heating element is installed inside the drying chamber, as well as a drive mechanism. Several material feeding racks are equidistantly arranged on the drive mechanism. This utility model, by incorporating the recovery pipe, return air pipe, recovery tank, and fans, can recover and reuse the hot airflow after drying, reducing direct heat loss and lowering the energy consumption of the heating element, effectively saving energy. It also enables rapid preheating of the subsequent PCBs.

Description

Technical Field

[0001] This utility model relates to the field of printed circuit board drying technology, and more specifically, to a printed circuit board processing dryer. Background Technology

[0002] Drying is a crucial step in the manufacturing process of printed circuit boards (PCBs). Its purpose is to remove moisture or other volatile substances from the surface and interior of the PCBs, ensuring the smooth progress of subsequent processing and the stable performance of the final product.

[0003] In the prior art, patent CN222628917U discloses a single-sided printed circuit board (PCB) printing and drying device, comprising: a box body, a door panel rotatably mounted on the side of the box body, a first sliding groove inside the box body, an I-shaped block slidably mounted in the first sliding groove, a ventilation hole on the box body communicating with the first sliding groove, the I-shaped block being connected to the inner wall of the first sliding groove by a third spring, a first fixing rod fixedly connected to the inner side of the door panel, and a first frustum block fixedly connected to the end of the first fixing rod, the first frustum block abutting against one end of the I-shaped block. In this invention, when the PCB is dried to "70% doneness", the door panel is opened, and the I-shaped block loses the abutting effect of the first frustum block. Under the elastic force of the third spring, it slides in the first sliding groove, so that the I-shaped block no longer blocks the ventilation hole, allowing the hot air inside the box to be quickly drawn in, thereby preventing the hot air inside the box from scalding the workers.

[0004] After drying, most existing devices directly output heat to the air through ventilation holes, resulting in a significant waste of heat. Furthermore, due to the slow heating rate of the heating device, it takes a long time for the temperature inside the drying chamber to reach the set drying temperature during the next drying cycle, extending the preparation time before drying and reducing the overall processing efficiency. Utility Model Content

[0005] The main objective of this invention is to provide a printed circuit board processing and drying machine that can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A printed circuit board (PCB) processing dryer includes a drying chamber. An air inlet pipe and an air outlet pipe are respectively arranged on both sides of the drying chamber. A recovery pipe is connected to the middle of the air outlet pipe, and a fan is installed on the recovery pipe. A return air pipe is arranged at the upper end of the drying chamber. Fans are installed on both the recovery pipe and the return air pipe. The ends of the return air pipe and the recovery pipe furthest from the drying chamber are connected to a recovery tank. A heating element is arranged inside the drying chamber. A driving mechanism is also arranged inside the drying chamber, and several material feeding racks are equidistantly arranged on the driving mechanism.

[0007] Preferably, valves are installed on the air inlet pipe, air return pipe, air outlet pipe, and recovery pipe.

[0008] Preferably, the driving mechanism includes a base plate, casters are mounted on the bottom of the base plate, and side plates are fixedly connected to both sides of the upper surface of the base plate.

[0009] Preferably, turntables are rotatably mounted inside both the upper and lower ends of the side plate, and a connecting rod connects the two turntables.

[0010] Preferably, one end of the turntable is fixedly connected to a rotating shaft, and the end of the rotating shaft away from the turntable is fixedly connected to the output end of the motor, and the motor is fixedly installed on the outside of the drying chamber.

[0011] Preferably, a transmission wheel is fixedly sleeved on the turntable, and the transmission wheels on the same side are connected by a transmission belt.

[0012] Preferably, several of the feeding racks are equidistantly arranged on the transmission belt, and both ends are rotatably connected to the two sides of the transmission belt through bearings, and the printed circuit board to be dried is laid on the feeding rack.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) By setting up a recovery pipe, return air pipe, recovery tank and fan, the hot air flow after drying can be recovered and reused, reducing the direct heat loss, reducing the energy consumption demand of the heating element, effectively saving energy, and also enabling rapid preheating of the subsequent printed circuit board.

[0014] (2) By setting a drive mechanism to drive the printed circuit board to rotate, the printed circuit board can be evenly contacted with the high temperature drying airflow in the drying chamber, ensuring that the drying quality of each printed circuit board is consistent. This rotation can also accelerate the flow of hot air in different parts of the chamber and improve the temperature uniformity in the chamber. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model; Figure 2 This is a three-dimensional schematic diagram of the drive mechanism structure in this utility model; Figure 3 This is a three-dimensional schematic diagram of a partial structure of the drive mechanism in this utility model.

[0016] In the diagram: 1. Drying chamber; 11. Air inlet duct; 12. Air return duct; 13. Air outlet duct; 14. Recovery duct; 15. Fan; 16. Heating element; 2. Drive mechanism; 21. Base plate; 22. Casters; 23. Side plate; 24. Turntable; 25. Connecting rod; 26. Transmission wheel; 27. Transmission belt; 28. Motor; 29. ​​Shaft; 3. Recovery tank; 4. Feeding rack. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0018] like Figure 1 As shown in the figure, this utility model embodiment proposes a printed circuit board processing dryer, including a drying chamber 1. An air inlet pipe 11 and an air outlet pipe 13 are respectively arranged on both sides of the drying chamber 1. A recovery pipe 14 is connected to the middle of the air outlet pipe 13. A return air pipe 12 is arranged at the upper end of the drying chamber 1. A fan 15 is installed on both the recovery pipe 14 and the return air pipe 12. The end of the return air pipe 12 and the recovery pipe 14 away from the drying chamber 1 is connected to the recovery tank 3. A heating element 16 is arranged inside the drying chamber 1. A drive mechanism 2 is also arranged inside the drying chamber 1. Several material feeding racks 4 are arranged at equal intervals on the drive mechanism 2.

[0019] like Figure 1 As shown, valves are installed on the air inlet pipe 11, air return pipe 12, air outlet pipe 13, and recovery pipe 14.

[0020] In use, the printed circuit boards are evenly laid on the feeding rack 4, and the heating element 16 heats the inside of the chamber to dry the printed circuit boards. After drying, the fan 15 is turned on to draw the hot air from the drying chamber 1 out through the air outlet pipe 13 and transport it to the collection tank 3 through the recovery pipe 14. On the one hand, the hot air can be quickly extracted to avoid the staff being injured by the hot air when opening the chamber. On the other hand, heat can be recovered. During the next drying, the hot air can be sent back into the chamber by the upper fan 15. This can realize the recovery and utilization of heat, reduce energy waste, and also quickly preheat the subsequent printed circuit boards.

[0021] like Figure 2 , Figure 3As shown, the drive mechanism 2 includes a base plate 21, with casters 22 mounted on the bottom of the base plate 21. Side plates 23 are fixedly connected to both sides of the upper surface of the base plate 21. Turntables 24 are rotatably mounted inside the upper and lower ends of the side plates 23. A connecting rod 25 is connected between the two turntables 24. A rotating shaft 29 is fixedly connected to one end of one turntable 24. The end of the rotating shaft 29 away from the turntable 24 is fixedly connected to the output end of the motor 28. The motor 28 is fixedly installed on the outside of the drying chamber 1. A transmission wheel 26 is fixedly sleeved on the turntable 24. The transmission wheels 26 on the same side are connected by a transmission belt 27. Several feeding racks 4 are equidistantly arranged on the transmission belt 27, and their two ends are rotatably connected to the two transmission belts 27 by bearings. The printed circuit boards to be dried are laid on the feeding racks 4.

[0022] The printed circuit boards are evenly laid on the feeding rack 4. During the drying process, the motor 28 drives the rotating shaft 29 to rotate, and the rotating shaft 29 drives the turntable 24 connected to it to rotate. Since the two turntables 24 are synchronously connected by the connecting rod 25, the other turntable 24 is driven to rotate synchronously. Then, through the transmission action of the transmission wheel 26 and the transmission belt 27, the upper turntable 24 is driven to rotate synchronously, thereby causing the feeding rack 4 to rotate with the transmission belt 27. The feeding rack 4 and the transmission belt 27 are rotatably connected by bearings to ensure that the front of the feeding rack 4 is facing upwards, and to prevent the printed circuit boards from tilting and falling during the rotation of the transmission belt 27.

[0023] By setting the drive mechanism 2 to drive the printed circuit board to rotate, the printed circuit board can be evenly contacted with the high temperature drying airflow in the drying chamber 1, ensuring that the drying quality of each printed circuit board is consistent. This rotation can also accelerate the flow of hot air in different parts of the chamber and improve the temperature uniformity of the chamber.

[0024] The working principle of this printed circuit board processing and drying machine: During operation, the printed circuit boards to be dried are first laid on the feeding rack 4 of the drive mechanism 2, the box door is closed, and the power supply of the heating element 16 is turned on. The heating element 16 heats up, raising the temperature inside the drying box 1 to the set drying temperature. The motor 28 is started, and the motor 28 drives the feeding rack 4 and the printed circuit boards to move inside the drying box 1 through the rotating shaft 29, turntable 24, transmission wheel 26 and transmission belt 27. The valves on the air inlet pipe 11 and air outlet pipe 13 are adjusted, and the outside air enters the drying box 1 through the air inlet pipe 11. It forms a high-temperature drying airflow with the heat generated by the heating element 16, which dries the printed circuit boards thoroughly and evenly during the movement. The dried airflow is then recycled into the recycling tank 3 through the recycling pipe 14 under the action of the fan 15. During the next drying operation, it is sent back into the box through the return air pipe 12, realizing the recovery and utilization of energy.

[0025] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A printed circuit board processing dryer, comprising a drying chamber (1), characterized in that: The drying chamber (1) is provided with an air inlet pipe (11) and an air outlet pipe (13) on both sides respectively. The air outlet pipe (13) is connected to a recovery pipe (14) in the middle. The drying chamber (1) is provided with a return air pipe (12) at the top. Both the recovery pipe (14) and the return air pipe are equipped with a fan (15). The end of the return air pipe (12) and the recovery pipe (14) away from the drying chamber (1) is connected to the recovery tank (3). The drying chamber (1) is provided with a heating element (16). The drying chamber (1) is also provided with a drive mechanism (2). Several material feeding racks (4) are equidistantly arranged on the drive mechanism (2).

2. The printed circuit board processing and drying machine according to claim 1, characterized in that: Valves are installed on the air inlet pipe (11), air return pipe (12), air outlet pipe (13), and recovery pipe (14).

3. The printed circuit board processing and drying machine according to claim 1, characterized in that: The drive mechanism (2) includes a base plate (21), with casters (22) installed at the bottom of the base plate (21), and side plates (23) fixedly connected to both sides of the upper surface of the base plate (21).

4. A printed circuit board processing and drying machine according to claim 3, characterized in that: The side plate (23) has a turntable (24) rotatably installed inside both the upper and lower ends, and a connecting rod (25) is connected between the two turntables (24).

5. A printed circuit board processing dryer according to claim 4, characterized in that: One end of the turntable (24) on one side is fixedly connected to a rotating shaft (29), and the end of the rotating shaft (29) away from the turntable (24) is fixedly connected to the output end of the motor (28). The motor (28) is fixedly installed on the outside of the drying chamber (1).

6. A printed circuit board processing dryer according to claim 4, characterized in that: A transmission wheel (26) is fixedly sleeved on the turntable (24), and the transmission wheels (26) located on the same side are connected by a transmission belt (27).

7. A printed circuit board processing dryer according to claim 6, characterized in that: Several of the feeding racks (4) are equidistantly arranged on the transmission belt (27), and both ends are rotatably connected to the two sides of the transmission belt (27) through bearings. The printed circuit board to be dried is laid on the feeding rack (4).

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