Drying device for printed circuit board (PCB) character jet printing

Abstract

The utility model discloses a drying device for printed circuit board (PCB) character jet printing, which belongs to the field of circuit board processing, and comprises a drying box, two groups of symmetrically arranged conveyor belts are arranged in the drying box, groove belts are arranged on the outer walls of the conveyor belts, a swing plate is rotatably connected in the drying box, and the swing plate is provided with a rotary shaft. A blowing box is fixedly connected to the top of the swing plate, two driving motors are fixedly connected to the interior of the drying box, eccentric wheels are fixedly connected to the output ends of the two driving motors, a driving groove is formed in the side wall of the swing plate, and the eccentric wheels are located in the driving groove; the circuit board is conveyed through the groove belt on the belt surface of the conveying belt, then the driving motor drives the eccentric wheel to rotate in the driving groove so as to drive the swing plate to swing in a reciprocating mode, the swing plate drives the blowing box to swing so as to comprehensively dry the upper side face and the lower side face of the circuit board, the comprehensiveness of red safety is improved, and the situation that local jet printing cannot be dried is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board processing, in particular to a drying device for printing characters on a PCB circuit board. Background Art

[0002] PCB circuit board, also known as printed circuit board, is the provider of electrical connections for electronic components. Its processing process is extremely complicated. After processing, professional drying equipment is required to dry the paint and moisture on the surface. The flexibility of existing PCB circuit board drying equipment is not high, which leads to certain limitations in the use of the equipment. It is impossible to effectively dry double-sided PCB circuit boards, which reduces the work efficiency of relevant staff. When drying with existing PCB circuit board drying equipment, different drying equipment needs to be replaced for PCB circuit boards of different shapes and sizes.

[0003] Patent No. CN213228045U discloses a drying device for printing characters on a PCB circuit board, comprising a bottom plate, a vertical plate and a vertical plate are fixedly connected to the bottom plate, the vertical plate is slidably connected to a limiting platform through a dovetail groove, an adjusting device is installed in the limiting platform, the adjusting device is rollingly connected to the limiting plate through a roller, the limiting plate is slidably connected to a card plate, the card plate is fixed on a conveyor belt, the limiting plate is clamped and connected to a PCB circuit board through a clamping device, the other end of the PCB circuit board is connected to a limiting plate located on one side of the vertical plate, the vertical plate is fixedly connected to a fan, the air outlet of the fan is connected to a pipe, the pipe is fixed to the side of the vertical plate, and the pipe is connected to a lower air outlet duct and an upper air outlet duct. The utility model can effectively dry single-sided and double-sided printed PCB circuit boards, and effectively dry PCB circuit boards of different specifications.

[0004] However, when the above-mentioned drying device is drying, the lower air outlet duct and the upper air outlet duct can only dry part of the circuit board, and the other parts of the circuit board are dried by the hot air blown onto the circuit board by the lower air outlet duct and the upper air outlet duct and then the hot air escaping is dried, resulting in poor drying effect at the position of the circuit board that is not directly in contact with the hot air, and the drying speed is not synchronized, which easily leads to changes in different printing positions, thereby reducing the quality of printing. Utility Model Content

[0005] In order to overcome the above-mentioned technical problems, the purpose of the utility model is to provide a drying device for printing characters on a PCB circuit board, so as to solve the problem in the prior art that when the above-mentioned drying device is drying, the lower air outlet duct and the upper air outlet duct can only dry part of the circuit board, and the other parts of the circuit board are dried by the hot air blown onto the circuit board by the lower air outlet duct and the upper air outlet duct and then the hot air dissipated, resulting in poor drying effect at the position on the circuit board that is not directly in contact with the hot air, and the drying speed is not synchronized, which easily leads to changes in different printing positions, thereby reducing the quality of printing.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A drying device for printing characters on a PCB circuit board comprises a drying box, wherein two groups of symmetrically arranged conveyor belts are arranged inside the drying box, and groove belts are arranged on the outer walls of the conveyor belts, and two groups of fixed rods are fixedly connected inside the drying box, and the two groups of fixed rods are respectively located on the upper and lower sides of the conveyor belts, and the outer walls of the fixed rods are rotatably connected to a swing plate, and a blow box is fixedly connected to the top of the swing plate, and two groups of drive motors are fixedly connected inside the drying box, and the output ends of the two groups of drive motors are fixedly connected to eccentric wheels, and the side walls of the swing plate are provided with drive grooves, and the eccentric wheels are located inside the drive grooves.

[0008] As a further solution of the utility model: a hot air blower is fixedly connected inside the drying box, and two groups of air supply pipes are fixedly connected to the output end of the hot air blower, and the two groups of air supply pipes are respectively connected to the two groups of blowing boxes.

[0009] As a further solution of the utility model: the two groups of blowing boxes are staggered.

[0010] As a further solution of the utility model: two groups of transmission motors are fixedly connected inside the drying box, and the output ends of the two groups of transmission motors are fixedly connected with half gears. Two groups of drive shafts are rotatably connected inside the drying box. The two groups of conveyor belts are respectively connected to the two groups of drive shafts for transmission. The drive shafts are fixedly connected with transmission gears, and the two groups of transmission gears are respectively meshed and connected with the two groups of half gears.

[0011] As a further solution of the utility model: the groove belt is provided with through holes in an equidistant array.

[0012] As a further solution of the utility model: an exhaust fan is arranged on the top of the drying box.

[0013] As a further solution of the utility model: a guide plate is fixedly connected to the inner wall of the bottom of the drying box, and a drainage hole is provided on one side of the bottom of the drying box.

[0014] Beneficial effects of the utility model:

[0015] In the utility model, the circuit board is conveyed by the groove belt on the conveyor belt surface, and then the driving motor drives the eccentric wheel to rotate inside the driving groove, thereby driving the swing plate to swing back and forth, and the swing plate drives the blow box to swing, so as to comprehensively and evenly dry the upper and lower sides of the circuit board, avoid local printing that cannot be dried, and improve the comprehensiveness and quality of drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the conveyor belt of the utility model from a top view;

[0019] Figure 3 It is a left-side structural schematic diagram of the swing plate in the utility model;

[0020] Figure 4 This utility model Figure 1 A schematic diagram of the enlarged structure of part A.

[0021] In the figure: 1, drying box; 101, drainage hole; 2, conveyor belt; 201, transmission motor; 202, half gear; 203, drive shaft; 204, transmission gear; 3, groove belt; 301, through hole; 4, fixing rod; 5, swing plate; 501, drive groove; 6, blowing box; 7, drive motor; 701, eccentric wheel; 8, hot air blower; 9, air supply pipe; 10, exhaust fan; 11, guide plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-Figure 4As shown, a drying device for printing characters on a PCB circuit board comprises a drying box 1, wherein two groups of symmetrically arranged conveyor belts 2 are arranged inside the drying box 1, and a groove belt 3 is arranged on the outer wall of the conveyor belt 2, and two groups of fixed rods 4 are fixedly connected inside the drying box 1, and the two groups of fixed rods 4 are respectively located on the upper and lower sides of the conveyor belt 2, and the outer wall of the fixed rod 4 is rotatably connected with a swing plate 5, and a blow box 6 is fixedly connected to the top of the swing plate 5, and two groups of driving motors 7 are fixedly connected inside the drying box 1, and the output ends of the two groups of driving motors 7 are fixedly connected with eccentric wheels 701, and the side wall of the swing plate 5 is provided with a driving groove 501, and the eccentric wheel 701 is located inside the driving groove 501, and at the same time, a hot air blower 8 is fixedly connected inside the drying box 1, and two groups of air supply pipes 9 are fixedly connected to the output end of the hot air blower 8, and the two groups of air supply pipes 9 are respectively connected with the two groups of blow boxes 6, so as to provide hot air to the inside of the two groups of blow boxes 6, thereby drying the circuit board.

[0024] like Figure 1 As shown, the two groups of blowing boxes 6 are staggered, so that when the circuit board is dried by the blowing boxes 6, it is convenient to discharge the moisture blown out of the circuit board.

[0025] like Figure 1 and Figure 3 As shown, the drying box 1 mentioned above is fixedly connected with two sets of transmission motors 201 inside, and the output ends of the two sets of transmission motors 201 are fixedly connected with half gears 202. The drying box 1 is rotatably connected with two sets of driving shafts 203 inside. The two sets of conveyor belts 2 are respectively connected with the two sets of driving shafts 203 for transmission. The driving shafts 203 are fixedly connected with transmission gears 204. The two sets of transmission gears 204 are respectively meshed with the two sets of half gears 202. The transmission motor 201 is started to drive the half gears 202 to rotate. The half gears 202 are intermittently meshed with the transmission gears 204 during the rotation process, so that the transmission gears 204 drive the conveyor belt 2 to rotate intermittently through the driving shaft 203, so that the circuit board placed inside the groove belt 3 on the conveyor belt 2 can stay on the blowing box 6 and be dried for a longer time, thereby improving the effect of circuit board printing and drying.

[0026] like Figure 1 and Figure 2 As shown, the groove belt 3 is provided with an equidistant array of through holes 301. Through the arrangement of the through holes 301, the swinging blow box 6 can discharge the moisture generated by the spray printing and drying on the circuit board to avoid moisture remaining inside the groove belt 3.

[0027] like Figure 1 As shown, an exhaust fan 10 is arranged on the top of the drying box 1, and the exhaust fan 10 is arranged to discharge the moisture generated by spraying and drying the circuit board inside the drying box 1, so as to avoid moisture remaining inside the drying box 1.

[0028] like Figure 1As shown, a guide plate 11 is fixedly connected to the inner wall of the bottom of the drying box 1, and a drainage hole 101 is provided at one side of the bottom of the drying box 1.

[0029] The working principle of the utility model is as follows: when the user uses it, the circuit board is inserted from one side of the drying box 1 into the groove belt 3 on the belt surface position of the two sets of conveyor belts 2 to be placed and fixed, and then the conveyor belt 2 rotates to drive the circuit board on the groove belt 3 to move, and at the same time, the two sets of driving motors 7 are started, and the driving motor 7 drives the eccentric wheel 701 to rotate inside the driving groove 501. During the rotation process, the eccentric wheel 701 repeatedly abuts against the inner walls on both sides of the driving groove 501, thereby pushing the swing plate 5 to swing in a fan shape with the fixed rod 4 as the center, thereby driving the blowing box 6 to move. The circuit board moves back and forth, and at the same time, the hot air blower 8 is started to extract air for heating, and then the air is sent into the two groups of blowing boxes 6 through the air supply pipe 9, and then blown out from the inside of the blowing box 6. When the circuit board moves to the upper and lower sides of the two groups of blowing boxes 6 respectively, the hot air blown out by the two groups of blowing boxes 6 dries the printing on the circuit board during the swinging process, so that the printing on the circuit board can be fully dried by the hot air, thereby improving the uniformity and comprehensiveness of the drying. The dried circuit board is conveyed out from the other side of the drying box 1 by the conveyor belt 2, thereby completing the drying of the printing on the circuit board.

[0030] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A drying device for printing characters on a PCB circuit board, comprising a drying box (1), characterized in that: Two groups of symmetrically arranged conveyor belts (2) are arranged inside the drying box (1), and the outer wall of the conveyor belt (2) is provided with a groove belt (3). Two groups of fixed rods (4) are fixedly connected inside the drying box (1), and the two groups of fixed rods (4) are respectively located at the upper and lower sides of the conveyor belt (2). The outer wall of the fixed rod (4) is rotatably connected with a swing plate (5), and the top of the swing plate (5) is fixedly connected with a blow box (6). Two groups of drive motors (7) are fixedly connected inside the drying box (1), and the output ends of the two groups of drive motors (7) are fixedly connected with eccentric wheels (701). The side wall of the swing plate (5) is provided with a drive groove (501), and the eccentric wheel (701) is located inside the drive groove (501).

2. A drying device for printing characters on a PCB circuit board according to claim 1, characterized in that: A hot air blower (8) is fixedly connected inside the drying box (1), and two groups of air supply pipes (9) are fixedly connected to the output end of the hot air blower (8), and the two groups of air supply pipes (9) are respectively connected to the two groups of blowing boxes (6).

3. A drying device for printing characters on a PCB circuit board according to claim 1, characterized in that: The two groups of blowing boxes (6) are arranged in a staggered manner.

4. A drying device for printing characters on a PCB circuit board according to claim 1, characterized in that: Two groups of transmission motors (201) are fixedly connected inside the drying box (1), and the output ends of the two groups of transmission motors (201) are fixedly connected with half gears (202). Two groups of drive shafts (203) are rotatably connected inside the drying box (1), and the two groups of conveyor belts (2) are respectively transmission-connected with the two groups of drive shafts (203). The drive shafts (203) are fixedly connected with transmission gears (204), and the two groups of transmission gears (204) are respectively meshed and connected with the two groups of half gears (202).

5. A drying device for printing characters on a PCB circuit board according to claim 1, characterized in that: The groove belt (3) is provided with through holes (301) in an equidistant array.

6. A drying device for printing characters on a PCB circuit board according to claim 1, characterized in that: An exhaust fan (10) is provided on the top of the drying box (1).

7. A drying device for printing characters on a PCB circuit board according to claim 1, characterized in that: A guide plate (11) is fixedly connected to the inner wall of the bottom of the drying box (1), and a drainage hole (101) is provided on one side of the bottom of the drying box (1).

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