Printing ink drying equipment for printed circuit board

Abstract

The utility model relates to the technical field of equipment for processing printed circuit boards, and discloses printing ink drying equipment for printed circuit boards, which comprises a belt conveyor, a drying box, an air heater, an air inlet pipe, an air outlet pipe, an exhaust fan, an air return pipe and an air dehumidification and purification treatment structure, the drying box is of an inverted-U-shaped plate body structure, the two ends of the drying box are fixedly installed on the left side and the right side of the belt conveyor respectively, the air inlet pipe penetrates through and is fixedly embedded in the right side box wall of the drying box, the right end of the air inlet pipe is connected with an air outlet of the air heater fixedly installed on the drying box, and the air outlet pipe penetrates through and is fixedly embedded in the left side box wall of the drying box. The left end of the air inlet pipe is connected with an air suction opening of an exhaust fan fixedly installed on the drying box, and the air inlet pipe and the air outlet pipe are connected with air return pipes located on the outer side of the drying box respectively. Compared with the prior art, the printed circuit board drying device has the advantages that air obtained after the printed circuit board is dried can be purified and then discharged, and the heat utilization rate can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment for processing printed circuit boards, in particular to equipment for drying ink for printed circuit boards. Background Art

[0002] There are many processing steps for printed circuit boards, one of which is to dry the ink on them. At present, the existing drying equipment is generally as follows: a drying box is installed and fixed on the belt conveyor, and a feed port and a discharge port are reserved on the opposite sides of the drying box. An air inlet pipe is connected to the side wall of the drying box, and the air inlet pipe continuously conveys hot air into the drying box and dries the printed circuit board. The printed circuit board enters the drying box from the feed port and comes out from the discharge port after drying, thereby completing the drying of the printed circuit board.

[0003] It is not difficult to see that when the existing drying equipment is in use, the hot air is generally discharged directly from the drying box after blowing through the printed circuit board. This not only causes heat waste and leads to low energy utilization rate; it also causes air pollution because the air after drying the printed circuit board contains many harmful substances. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the above technical difficulties and provide a printed circuit board ink drying device, which, when in use, can purify the air after drying the printed circuit board before discharging it, and can improve the utilization rate of heat.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0006] A printed circuit board ink drying device comprises a belt conveyor, a drying box, a hot air blower, an air inlet pipe, an air outlet pipe, an exhaust fan, a return air duct and an air dehumidification and purification treatment structure; the drying box is an inverted U-shaped plate structure, and its two ends are respectively fixedly installed on the left and right sides of the belt conveyor, the air inlet pipe runs through and is embedded and fixed on the right side box wall of the drying box, and the right end is connected to the air outlet of the hot air blower installed and fixed on the drying box, the air outlet pipe runs through and is embedded and fixed on the left side box wall of the drying box, and the left end is connected to the air outlet of the exhaust fan installed and fixed on the drying box, the air inlet pipe and the air outlet pipe are respectively connected to the return air duct located outside the drying box, and the other ends of the two return air ducts are connected through the air dehumidification and purification treatment structure.

[0007] As an improvement, the air dehumidification and purification treatment structure includes a purification cylinder, a HEPA filter, a composite filter and a photocatalyst filter; the HEPA filter, the composite filter and the photocatalyst filter are installed in the purification cylinder from left to right in sequence, and are used to effectively dehumidify and purify the air after drying the printed circuit board.

[0008] As an improvement, it also includes a locking cap; the return air duct is an inverted L-shaped tube structure, and the two return air ducts are arranged in mirror images on the left and right, a limit retaining ring is integrally formed on the outer wall of the top of the return air duct, the purification tube is clamped between the two limit retaining rings, and the outer diameter is equal to the outer diameter of the limit retaining ring, the locking cap is a tube structure with one end closed, and a pair of left and right mirror images are arranged, a through hole is reserved on the end face of the locking cap for the horizontal section of the return air duct to pass through, and after the locking cap is threadedly sleeved on the end of the purification tube, the limit retaining ring is clamped and fixed between the end face of the locking cap and the purification tube. The air dehumidification and purification treatment structure can be easily loaded and unloaded, so that it is easy to replace it regularly.

[0009] As an improvement, a wind distribution box is fixed to the free end of the air inlet pipe, the wind distribution box is a plate-shaped box structure, and a plurality of air outlets are evenly opened on the box wall on the side facing away from the air inlet pipe;

[0010] The free end of the air outlet pipe is fixed with an air distribution box, and a plurality of air inlets are evenly opened on the box wall of the air distribution box on one side facing away from the air outlet pipe. The drying range is larger, and the printed circuit board can be dried more comprehensively.

[0011] The advantages of the utility model compared with the prior art are:

[0012] 1. When the present invention is in use, the hot air blower blows out hot air, which is blown onto the printed circuit board more widely and evenly through the right air distribution box, and then most of the air is sucked away by the left air distribution box under the action of the exhaust fan. Most of the hot air will flow back into the drying box after passing through the air dehumidification and purification treatment structure, thereby improving the utilization rate of heat.

[0013] 2. When the present invention is in use, most of the air after drying the printed circuit board will flow back into the return air duct and purify the air dehumidification and purification structure, which can effectively reduce the pollution to the air caused by the work of drying the graphite on the printed circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a partial structural schematic diagram of the utility model.

[0016] Figure 3 It is a cross-sectional structural schematic diagram of the air dehumidification and purification processing structure of the utility model.

[0017] Figure 4 It is a structural schematic diagram of the locking cap of the utility model.

[0018] As shown in the figure: 1. Belt conveyor; 2. Drying box; 3. Hot air blower; 4. Air inlet duct; 5. Air outlet duct; 6. Exhaust fan; 7. Return air duct; 8. Purification cylinder; 9. HEPA filter; 10. Composite filter; 11. Photocatalyst filter; 12. Locking cap; 13. Limiting ring; 14. Air distribution box; 15. Air outlet. DETAILED DESCRIPTION

[0019] In the description of the present utility model, it should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variation thereof are intended to cover non-exclusive inclusions.

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0021] A printed circuit board ink drying device, comprising:

[0022] The belt conveyor 1 is an existing device well known to those skilled in the art;

[0023] A drying box 2, a hot air blower 3, an air inlet duct 4, an air outlet duct 5, an exhaust fan 6, a return air duct 7 and an air dehumidification and purification treatment structure; the drying box 2 is an inverted U-shaped plate structure, and the two ends are respectively fixedly installed on the left and right sides of the belt conveyor 1, the air inlet duct 4 passes through and is embedded and fixed on the right side box wall of the drying box 2, and the right end is connected to the air outlet of the hot air blower 3 installed and fixed on the drying box 2, the air outlet duct 5 passes through and is embedded and fixed on the left side box wall of the drying box 2, and the left end is connected to the air outlet of the exhaust fan 6 installed and fixed on the drying box 2, the air inlet duct 4 and the air outlet duct 5 are respectively connected to the return air duct 7 located outside the drying box 2, and the other ends of the two return air ducts 7 are connected through the air dehumidification and purification treatment structure.

[0024] As an embodiment, the air dehumidification and purification treatment structure includes a purification cylinder 8, a HEPA filter 9, a composite filter 10 and a photocatalyst filter 11; the HEPA filter 9, the composite filter 10 and the photocatalyst filter 11 are sequentially installed from left to right in the purification cylinder 8. The composite filter 10 is composed of an activated carbon layer and coconut shell fiber.

[0025] It is worth mentioning that the present embodiment also includes a locking cap 12; the return air duct 7 is an inverted L-shaped tube structure, and the two return air ducts 7 are arranged in left and right mirror images, and a limit stop ring 13 is integrally formed on the outer wall of the top end of the return air duct 7, and the purification cylinder 8 is clamped between the two limit stop rings 13, and the outer diameter is equal to the outer diameter of the limit stop ring 13, the locking cap 12 is a tube structure with one end closed, and a pair of left and right mirror images are arranged, and a through hole is reserved on the end face of the locking cap 12 for the horizontal section of the return air duct 7 to pass through, and after the locking cap 12 is threadedly sleeved on the end of the purification cylinder 8, the limit stop ring 13 is clamped and fixed between the end face of the locking cap 12 and the purification cylinder 8.

[0026] As an embodiment, a wind distribution box 14 is fixed to the free end of the air inlet pipe 4, and the wind distribution box 14 is a plate-shaped box structure, and a plurality of air outlets 15 are evenly provided on the box wall on the side facing away from the air inlet pipe 4. A wind distribution box 14 is fixed to the free end of the air outlet pipe 5, and a plurality of air inlets are evenly provided on the box wall on the side facing away from the air outlet pipe 5.

[0027] In the specific implementation of this embodiment: Figure 1 As shown, the printed circuit board is transported from front to back on the belt conveyor 1. When passing through the drying box 2, the hot air blower 3 blows out hot air and injects it into the air distribution box 14 on the right, and then it is discharged from each air outlet 15, so as to quickly and effectively dry the ink on the printed circuit board.

[0028] During the process, most of the air blowing through the printed circuit board is sucked away and flows back into the return pipe 7 under the cooperation of the exhaust fan 6 and the left air distribution box 14. Then the air will pass through the HEPA filter 9, the composite filter 10 and the photocatalyst filter 11 in sequence, and will be effectively dehumidified, sterilized and purified by eliminating harmful substances, and finally flow back into the drying box 2.

[0029] After the air dehumidification and purification structure has been used for a period of time, it should be replaced to ensure that the printed circuit board ink drying equipment always has a good air purification effect. The specific operation is: turn the locking cap 12 counterclockwise to separate it from the purification cylinder 8, and then the purification cylinder 8 can be directly removed; then take out a new air dehumidification and purification structure and reinstall it.

[0030] It is easy to understand that the hot air blower 3, the exhaust fan 6, the HEPA filter 9, the composite filter 10 and the photocatalyst filter 11 used in this embodiment are all existing technologies well known to those skilled in the art.

[0031] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A printed circuit board ink drying device, comprising a belt conveyor (1), characterized in that: The invention also comprises a drying box (2), a hot air blower (3), an air inlet pipe (4), an air outlet pipe (5), an exhaust fan (6), a return air pipe (7) and an air dehumidification and purification treatment structure; the drying box (2) is an inverted U-shaped plate structure, and its two ends are respectively fixedly mounted on the left and right sides of the belt conveyor (1); the air inlet pipe (4) passes through and is embedded and fixed on the right side box wall of the drying box (2), and its right end is connected to the air outlet of the hot air blower (3) installed and fixed on the drying box (2); the air outlet pipe (5) passes through and is embedded and fixed on the left side box wall of the drying box (2), and its left end is connected to the air outlet of the exhaust fan (6) installed and fixed on the drying box (2); the air inlet pipe (4) and the air outlet pipe (5) are respectively connected to the return air pipe (7) located outside the drying box (2), and the other ends of the two return air pipes (7) are connected through the air dehumidification and purification treatment structure.

2. The printed circuit board ink drying device according to claim 1, characterized in that: The air dehumidification and purification treatment structure comprises a purification cylinder (8), a HEPA filter (9), a composite filter (10) and a photocatalyst filter (11); the HEPA filter (9), the composite filter (10) and the photocatalyst filter (11) are installed in the purification cylinder (8) in sequence from left to right.

3. The printed circuit board ink drying device according to claim 2, characterized in that: The composite filter screen (10) is composited from an activated carbon layer and coconut shell fibers.

4. The printed circuit board ink drying device according to claim 3, characterized in that: It also includes a locking cap (12); the return air duct (7) is an inverted L-shaped tube structure, and the two return air ducts (7) are arranged in a mirror image on the left and right. A limit stop ring (13) is integrally formed on the outer wall of the top end of the return air duct (7). The purification cylinder (8) is clamped between the two limit stop rings (13), and the outer diameter is equal to the outer diameter of the limit stop ring (13). The locking cap (12) is a tube structure with one end closed, and a pair of left and right mirror images are arranged. A through hole is reserved on the end face of the locking cap (12) for the horizontal section of the return air duct (7) to pass through, and after the locking cap (12) is threadedly sleeved on the end of the purification cylinder (8), the limit stop ring (13) is clamped and fixed between the end face of the locking cap (12) and the purification cylinder (8).

5. The printed circuit board ink drying device according to claim 1, characterized in that: An air distribution box (14) is fixed to the free end of the air inlet pipe (4); the air distribution box (14) is a plate-shaped box structure, and a plurality of air outlets (15) are evenly arranged on the box wall on the side facing away from the air inlet pipe (4).

6. The printed circuit board ink drying device according to claim 5, characterized in that: An air distribution box (14) is fixed to the free end of the air outlet pipe (5), and a plurality of air inlets are evenly arranged on a box wall of the air distribution box (14) on one side facing away from the air outlet pipe (5).

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