CN214582270U - Circuit board copper deposition drying device - Google Patents

Abstract

The utility model discloses a circuit board copper deposition drying device, which belongs to the field of circuit board processing equipment and comprises a tank body, a first rotating part and a second rotating part, wherein the bottom of the tank body is provided with a bearing support, the top of the tank body is provided with a cover plate hinged with the tank body, the bottom end of the first rotating part extends to the inside of the tank body, the second rotating part is positioned in the inside of the tank body, the top of the first rotating part is provided with a plurality of bearing boxes, each bearing box is internally provided with a rectangular frame which is spliced and matched with the bearing box, the bearing boxes and the rectangular frames form a containing cavity for placing a circuit board, the side wall of the tank body is provided with a filtering part, the utility model realizes the double-sided drying of the circuit board by the driving and rotating of the first rotating part and the second rotating part, thereby improving the drying efficiency and the drying effect of the circuit board, further improving the overall practicability of the equipment, and purifying and discharging toxic gas generated in the tank body by the filtering part, thereby reducing the environmental pollution and ensuring the health of the workers.

Description

Circuit board copper deposition drying device

Technical Field

The utility model belongs to the technical field of circuit board processing equipment and specifically relates to a heavy copper drying device of circuit board is related to.

Background

The circuit board can be called as a printed circuit board or a printed circuit board, and is also divided into a PCB, an FPC circuit board and a rigid-flex board, and the birth and development of the FPC and the PCB urge the generation of a new product of the rigid-flex board. Therefore, the rigid-flex circuit board is a circuit board with FPC (flexible printed circuit) characteristics and PCB (printed circuit board) characteristics, which is formed by combining a flexible circuit board and a rigid circuit board according to relevant process requirements through processes such as pressing and the like.

In the manufacturing process of the printed circuit board, in order to realize metallization in the hole, chemical deposition is generally adopted, namely chemical copper deposition (generally referred to as copper deposition), the circuit board after copper deposition is generally required to be placed into a board holding groove to be electroplated, the board holding groove contains a large amount of liquid, therefore, the circuit board is required to be dried before electroplating, the existing horizontal drying equipment can only dry one side of the circuit board, but can not dry two sides of the circuit board, the drying is not uniform enough, moisture residue on the circuit board is easy to cause, the quality is unqualified, great waste is caused, the drying efficiency is lower, meanwhile, some toxic and strong acidic chemical substances such as cyanide or sulfuric acid are involved in the processing process of chemical copper plating and are attached to the surface of a workpiece, toxic gas can be generated in the heating and drying process, and if the chemical substances are not treated, the toxic gas is directly discharged in the processing environment, irreparable harm can be caused to operators and environment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heavy copper drying device of circuit board to solve the technical problem of drying among the prior art uneven and toxic gas handles.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a circuit board copper deposition drying device comprises a tank body, a first rotating part and a second rotating part, wherein a bearing support fixedly connected with the tank body is arranged at the bottom of the tank body, a cover plate hinged with the tank body is arranged at the top of the tank body, the first rotating part is vertically arranged, the bottom end of the first rotating part extends to the inside of the tank body, the second rotating part is positioned in the tank body, the second rotating part is installed at the top of the first rotating part, a plurality of bearing boxes uniformly distributed along the axis of the tank body are arranged at the top of the first rotating part, a rectangular frame in plug-in fit with the bearing boxes is arranged in each bearing box, the bearing boxes and the rectangular frames form a containing cavity for containing a circuit board, a through hole group communicated with the containing cavity is arranged on each rectangular frame, an air supply pipe communicated with the inside of the tank body is arranged at the top of the tank body, and a hot air heater communicated with the air supply pipe is arranged beside the bearing support, the lateral wall of the tank body is provided with a filtering component for filtering the air in the tank body, and one end of the filtering component is communicated with the interior of the tank body.

Preferably, the first rotating part comprises a driving motor, a first rotating shaft, a first bevel gear, a connecting disc, four supporting shafts and a plurality of supporting cross rods, the driving motor is vertically arranged at the bottom of the tank body, the output end of the driving motor is fixedly connected with the bottom end of a first rotating shaft which is vertically arranged in the tank body, the first bevel gear is sleeved on the first rotating shaft, the first bevel gear is fixedly connected with the inner bottom wall of the tank body through four support shafts, the connecting disc is horizontally fixed at the top of the first rotating shaft, a plurality of support cross rods are uniformly distributed along the axis of the first rotating shaft, and the rear end of every support horizontal pole all with connection pad fixed connection, all be equipped with on the one end of every support horizontal pole rather than the driven shaft of being connected of rotating, the top and the bearing box fixed connection of driven shaft, the bottom and the second rotary part fixed connection of driven shaft.

Preferably, the second rotary part includes linkage assembly and five transmission assemblies, and the linkage assembly is horizontal installation in the bottom that supports the horizontal pole, and five transmission assemblies are along the axis evenly distributed of first rotation axis to every transmission assembly's both ends respectively with two driven shaft fixed connection, the linkage assembly includes second rotation axis, riser, second bevel gear, third bevel gear and fourth bevel gear, the top of riser and a middle section bottom fixed connection who supports the horizontal pole, the well tip of second rotation axis rotates and installs on the bottom of riser, second bevel gear and third bevel gear are fixed respectively on the both ends of second rotation axis, and second bevel gear and first bevel gear meshing, and the fourth bevel gear is fixed on a driven shaft bottom to fourth bevel gear and third bevel gear meshing.

Preferably, each transmission assembly comprises a synchronous chain and two driven gears, the two driven gears are respectively fixed on one end of each of the two adjacent driven shafts, and the synchronous chain is sleeved on the two driven gears.

Preferably, the filter part comprises a connecting pipe and an air pump, two ends of the connecting pipe are respectively communicated with the tank body and the input end of the air pump, a first particle adsorption layer, a second alkaline substance adsorption layer, a third acidic substance adsorption layer and a fourth air filter layer are sequentially arranged in the length direction of the connecting pipe, and the air pump is arranged beside the bearing support.

Preferably, the number of the supporting cross rods and the number of the supporting boxes are the same, and six supporting cross rods and six supporting boxes are arranged.

Compared with the prior art, the beneficial effects of the utility model reside in that:

firstly, opening a cover plate, placing a circuit board in an accommodating cavity formed by a bearing box and a rectangular frame, closing the cover plate, driving a first rotating shaft fixedly connected with the output end of the cover plate to rotate through a driving motor, driving a connecting disc fixedly connected with the first rotating shaft and six supporting cross rods fixedly connected with the connecting disc to synchronously rotate, meanwhile, sending hot air to the inside of a tank body through an air supply pipe by the work of an air heater, improving the temperature in the tank body, and realizing the purposes of primarily drying the two sides of the circuit board and improving the drying efficiency of the circuit board by utilizing a through hole group communicated with the accommodating cavity and arranged on the rectangular frame;

secondly, a first rotating shaft fixedly connected with the output end of the first rotating shaft is driven to rotate by a driving motor, a vertical plate fixedly connected with a supporting cross rod can be driven to rotate, a second bevel gear and a third bevel gear on the two ends of the second rotating shaft are driven to rotate, the middle end part of the second rotating shaft is rotatably arranged under the meshing action of the vertical plate, the second bevel gear and the first bevel gear, so that the second rotating shaft rotates, and the second bevel gear and the third bevel gear on the two ends of the second rotating shaft are driven to rotate, wherein the second bevel gear moves along the circumferential direction of the first bevel gear, the first bevel gear is fixedly connected with the inner bottom wall of the tank body through four supporting shafts, so that the rotating track of the second bevel gear is guided, and a driven shaft fixedly connected with the fourth bevel gear is driven to rotate by the meshing action of the third bevel gear and the fourth bevel gear, so that a driven gear on the driving shaft is driven to rotate, under the action of the synchronous chain, all driven shafts synchronously rotate at a constant speed, the circuit board arranged in the bearing box and the rectangular frame on the top end of the driven shaft rotates by three hundred sixty degrees, the drying efficiency and effect of the circuit board are further improved, and the overall practicability of the equipment is improved;

thirdly, after the circuit board is dried and is accomplished, the air heater stop work, the air of the internal portion of jar is in proper order through the first layer particle adsorption layer that sets up on the connecting pipe with the work of air pump, the alkaline material adsorption layer of second floor, third layer acid material adsorption layer and fourth layer air filter layer, the realization purifies the emission to the toxic gas that the internal portion of jar produced, and then environmental pollution has been reduced, staff's healthy has been ensured, and can also reduce the temperature of the internal portion of jar and the temperature of circuit board face, the condition emergence of being scalded because of the high temperature when preventing to take out the circuit board.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a top view of the present invention;

fig. 3 is a cross-sectional view taken along line a-a of fig. 2 in accordance with the present invention;

FIG. 4 is a schematic cross-sectional view of the three-dimensional structure of the present invention;

fig. 5 is a schematic view of the internal structure of the tank of the present invention.

Reference numerals:

the air suction device comprises a tank body 1, a first rotating part 2, a driving motor 21, a first rotating shaft 22, first bevel gears 23, connecting discs 24, supporting shafts 25, a supporting cross rod 26, a driven shaft 27, a second rotating part 3, a linkage assembly 31, a transmission assembly 32, a second rotating shaft 311, a vertical plate 312, second bevel gears 313, third bevel gears 314, fourth bevel gears 315, a synchronous chain 321, driven gears 322, a bearing support 4, a cover plate 5, a containing cavity 6, a bearing box 61, a rectangular frame 62, a through hole group 63, an air supply pipe 71, a filtering part 8, a connecting pipe 81, an air suction pump 82, a particle adsorption layer 83, an alkaline substance adsorption layer 84, an acidic substance adsorption layer 85 and an air filtering layer 86.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, an embodiment of the present invention provides a circuit board copper deposition drying device, which includes a tank 1, a first rotating component 2 and a second rotating component 3, wherein a supporting bracket 4 fixedly connected to the tank 1 is disposed at the bottom of the tank 1, a cover plate 5 hinged to the tank 1 is disposed at the top of the tank 1, the first rotating component 2 is vertically disposed, and the bottom end of the first rotating component extends into the tank 1, the second rotating component 3 is disposed inside the tank 1, the second rotating component 3 is mounted at the top of the first rotating component 2, a plurality of supporting boxes 61 uniformly distributed along the axis of the tank 1 are disposed at the top of the first rotating component 2, a rectangular frame 62 inserted into the supporting boxes 61 is disposed in each supporting box 61, the supporting boxes 61 and the rectangular frames 62 form a containing cavity 6 for placing a circuit board, each rectangular frame 62 is provided with a through hole group 63 communicated with the containing cavity 6, the top of the tank body 1 is provided with an air supply pipe 71 communicated with the inside of the tank body, the side of the bearing support 4 is provided with an air heater communicated with the air supply pipe 71, the side wall of the tank body 1 is provided with a filter component 8 for filtering the air inside the tank body, and one end of the filter component 8 is communicated with the inside of the tank body 1.

Specifically, the first rotating part 2 includes a driving motor 21, a first rotating shaft 22, a first bevel gear 23, a connecting disc 24, four supporting shafts 25 and a plurality of supporting cross bars 26, the driving motor 21 is vertically installed at the bottom of the tank body 1, the output end of the driving motor 21 is fixedly connected with the bottom end of the first rotating shaft 22, the first rotating shaft 22 is vertically installed inside the tank body 1, the first bevel gear 23 is sleeved on the first rotating shaft 22, the first bevel gear 23 is fixedly connected with the inner bottom wall of the tank body 1 through the four supporting shafts 25, the connecting disc 24 is horizontally fixed at the top of the first rotating shaft 22, the plurality of supporting cross bars 26 are uniformly distributed along the axis of the first rotating shaft 22, the rear end of each supporting cross bar 26 is fixedly connected with the connecting disc 24, one end of each supporting cross bar 26 is provided with a driven shaft 27 rotatably connected therewith, the top and the bearing box 61 fixed connection of driven shaft 27, the bottom and the second rotary part 3 fixed connection of driven shaft 27, rotate rather than output fixed connection's first rotation axis 22 through driving motor 21 drive, drive connection pad 24 with first rotation axis 22 fixed connection and rotate with six support horizontal poles 26 of connection pad 24 fixed connection in step, meanwhile, send hot-blast process blast pipe 71 to jar internal 1 through air heater work, improve the temperature in jar internal 1, be equipped with on the rectangular frame 62 and hold the through-hole group 63 that the chamber 6 is linked together, realize the purpose of the two-sided preliminary drying of circuit board and improving its drying efficiency.

Specifically, the second rotating part 3 comprises a linkage component 31 and five transmission components 32, the linkage component 31 is horizontally installed at the bottom of one supporting cross bar 26, the five transmission components 32 are uniformly distributed along the axis of the first rotating shaft 22, and two ends of each transmission component 32 are respectively fixedly connected with two driven shafts 27, the linkage component 31 comprises a second rotating shaft 311, a vertical plate 312, a second bevel gear 313, a third bevel gear 314 and a fourth bevel gear 315, the top end of the vertical plate 312 is fixedly connected with the bottom of the middle section of one supporting cross bar 26, the middle end of the second rotating shaft 311 is rotatably installed at the bottom end of the vertical plate 312, the second bevel gear 313 and the third bevel gear 314 are respectively fixed at two ends of the second rotating shaft 311, the second bevel gear 313 is meshed with the first bevel gear 23, the fourth bevel gear 315 is fixed at the bottom end of one driven shaft 27, and the fourth bevel gear 315 is meshed with the third bevel gear 314, the first rotating shaft 22 fixedly connected with the output end of the first rotating shaft is driven to rotate by the driving motor 21, and the vertical plate 312 fixedly connected with a supporting cross bar 26 can be driven to rotate, and then the second bevel gear 313 and the third bevel gear 314 on the two ends of the second rotating shaft 311 are driven to rotate, the middle end part of the second rotating shaft 311 is rotatably arranged under the meshing action of the vertical plate 312, the second bevel gear 313 and the first bevel gear 23, so that the second rotating shaft 311 rotates, and the second bevel gear 313 and the third bevel gear 314 on the two ends of the second rotating shaft 311 are driven to rotate, wherein the second bevel gear 313 moves along the circumferential direction of the first bevel gear 23, the first bevel gear 23 is fixedly connected with the inner bottom wall of the tank body 1 through four supporting shafts 25, so that the rotating track of the second bevel gear 313 is guided, and a driven shaft 27 fixedly connected with the fourth bevel gear 315 is driven to rotate by the meshing action of the third bevel gear 314 and the fourth bevel gear 315, and then drive a driven gear 322 on this transmission shaft and rotate, under the effect of synchronizing chain 321, realize that all driven shafts 27 are synchronous at the uniform velocity rotatory, realize installing bearing box 61 on driven shaft 27 top and the circuit board three hundred sixty degrees rotations in the rectangular frame 62, further improve the drying efficiency and the effect of circuit board, improved the whole practicality of equipment.

Specifically, the filter element 8 includes a connecting pipe 81 and an air pump 82, two ends of the connecting pipe 81 are respectively communicated with the tank 1 and an input end of the air pump 82, a first particle adsorption layer 83 (a common filter cloth layer, which filters larger particles in the gas), a second alkaline substance adsorption layer 84 (a mixture layer of sodium bicarbonate and sodium bicarbonate with a mass ratio of 5: 3), a third acidic substance adsorption layer 85 (a silicon-aluminum molecular sieve layer with a silicon-aluminum ratio of 2:1-1: 1) and a fourth air filtration layer 86 (a composite layer of a viscose fiber layer and an active carbon fiber layer) are sequentially disposed along a length direction of the connecting pipe 81, the air pump 82 is disposed beside the bearing support 4, the air pump 82 works to make the air inside the tank 1 sequentially pass through the first particle adsorption layer 83 and the second alkaline substance adsorption layer 84 disposed on the connecting pipe 81, third layer acid material adsorbed layer 85 and fourth layer air filter layer 86 realize purifying the discharge with the inside toxic gas that produces of jar body 1, and then reduced environmental pollution, ensured that staff's is healthy, and can also reduce the temperature of the inside temperature of jar body 1 and the temperature of circuit board face, the condition emergence of being scalded because of the high temperature when preventing to take out the circuit board.

The utility model discloses a theory of operation: firstly, opening a cover plate 5, placing a circuit board in a containing cavity 6 formed by a bearing box 61 and a rectangular frame 62, closing the cover plate 5, driving a first rotating shaft 22 fixedly connected with the output end of the circuit board to rotate through a driving motor 21, driving a connecting disc 24 fixedly connected with the first rotating shaft 22 and six supporting cross bars 26 fixedly connected with the connecting disc 24 to synchronously rotate, meanwhile, sending hot air into a tank body 1 through an air supply pipe 71 by the work of a hot air blower, improving the temperature in the tank body 1, realizing the purposes of preliminary drying of the double surfaces of the circuit board and improving the drying efficiency of the circuit board by utilizing a through hole group 63 communicated with the containing cavity 6 on the rectangular frame 62, driving the first rotating shaft 22 fixedly connected with the output end of the circuit board to rotate by utilizing the driving motor 21, driving a vertical plate 312 fixedly connected with one supporting cross bar 26 to rotate, and driving a second bevel gear 313 and a third bevel gear 314 on two ends of a second rotating shaft 311 to rotate, under the meshing action of the second bevel gear 313 and the third bevel gear 313 which are rotatably arranged at the middle end part of the second rotating shaft 311 and the vertical plate 312 and the first bevel gear 23, the second rotating shaft 311 rotates, and drives the second bevel gear 313 and the third bevel gear 314 at the two ends of the second rotating shaft 311 to rotate, wherein the second bevel gear 313 moves along the circumferential direction of the first bevel gear 23, the first bevel gear 23 is fixedly connected with the inner bottom wall of the tank body 1 through four supporting shafts 25, the rotating track of the second bevel gear 313 is guided, by utilizing the meshing action of the third bevel gear 314 and the fourth bevel gear 315, a driven shaft 27 fixedly connected with the fourth bevel gear 315 is driven to rotate, thereby driving a driven gear 322 on the driving shaft to rotate, under the action of a synchronous chain 321, all the driven shafts 27 rotate synchronously at a constant speed, and realizing the three hundred sixty degrees rotation of a circuit board arranged in a bearing box 61 and a rectangular frame 62 at the top end part of the driven shaft 27, further improve the drying efficiency and the effect of circuit board, the whole practicality of equipment has been improved, after the circuit board is dried and is accomplished, the air heater stop work, the air pump 82 work is with the first layer granule adsorbed layer 83 that sets up on the air of jar body 1 inside passes through the connecting pipe 81 in proper order, second floor alkaline material adsorbed layer 84, third layer acid material adsorbed layer 85 and fourth layer air filter layer 86, the realization purifies the emission with the inside poisonous gas that produces of jar body 1, and then environmental pollution has been reduced, staff's healthy has been ensured, and can also reduce the temperature of jar body 1 inside temperature and the temperature of circuit board face, the condition of being scalded because of the high temperature takes place when preventing to take out the circuit board.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (6)

1. The utility model provides a heavy copper drying device of circuit board which characterized in that: the multifunctional pot comprises a pot body (1), a first rotating part (2) and a second rotating part (3), wherein a bearing support (4) fixedly connected with the pot body is arranged at the bottom of the pot body (1), a cover plate (5) hinged with the pot body is arranged at the top of the pot body (1), the first rotating part (2) is vertically arranged, the bottom end of the first rotating part extends into the pot body (1), the second rotating part (3) is positioned in the pot body (1), the second rotating part (3) is installed at the top of the first rotating part (2), a plurality of bearing boxes (61) uniformly distributed along the axis of the pot body (1) are arranged at the top of the first rotating part (2), a rectangular frame (62) in inserting fit with the bearing boxes (61) is arranged in each bearing box (61), a containing cavity (6) for containing a circuit board is formed by the bearing boxes (61) and the rectangular frames (62), and through hole groups (63) communicated with the containing cavities (6) are arranged on each rectangular frame (62), the air heating pot is characterized in that an air supply pipe (71) communicated with the inside of the pot body (1) is arranged at the top of the pot body, an air heater communicated with the air supply pipe (71) is arranged beside the bearing support (4), a filtering part (8) for filtering air inside the pot body (1) is arranged on the side wall of the pot body (1), and one end of the filtering part (8) is communicated with the inside of the pot body (1).

2. The circuit board electroless plating copper drying device of claim 1, which is characterized in that: the first rotating part (2) comprises a driving motor (21), a first rotating shaft (22), a first bevel gear (23), a connecting disc (24), four supporting shafts (25) and a plurality of supporting cross rods (26), the driving motor (21) is vertically arranged at the bottom of the tank body (1), the output end of the driving motor (21) is fixedly connected with the bottom end of the first rotating shaft (22), the first rotating shaft (22) is vertically arranged in the tank body (1), the first bevel gear (23) is sleeved on the first rotating shaft (22), the first bevel gear (23) is fixedly connected with the inner bottom wall of the tank body (1) through the four supporting shafts (25), the connecting disc (24) is horizontally fixed at the top of the first rotating shaft (22), the supporting cross rods (26) are uniformly distributed along the axis of the first rotating shaft (22), and the rear end of each supporting cross rod (26) is fixedly connected with the connecting disc (24), one end of each supporting cross rod (26) is provided with a driven shaft (27) rotatably connected with the supporting cross rod, the top end of the driven shaft (27) is fixedly connected with the bearing box (61), and the bottom end of the driven shaft (27) is fixedly connected with the second rotating part (3).

3. The circuit board electroless plating copper drying device of claim 2, which is characterized in that: the second rotating part (3) comprises a linkage component (31) and five transmission components (32), the linkage component (31) is horizontally arranged at the bottom of one supporting cross rod (26), the five transmission components (32) are uniformly distributed along the axis of the first rotating shaft (22), the two ends of each transmission component (32) are respectively fixedly connected with two driven shafts (27), the linkage component (31) comprises a second rotating shaft (311), a vertical plate (312), a second bevel gear (313), a third bevel gear (314) and a fourth bevel gear (315), the top end of the vertical plate (312) is fixedly connected with the bottom of the middle section of one supporting cross rod (26), the middle end of the second rotating shaft (311) is rotatably arranged at the bottom end of the vertical plate (312), the second bevel gear (313) and the third bevel gear (314) are respectively fixed at the two ends of the second rotating shaft (311), and the second bevel gear (313) is meshed with the first bevel gear (23), the fourth bevel gear 315 is fixed to the bottom end of a driven shaft 27, and the fourth bevel gear 315 meshes with the third bevel gear 314.

4. The circuit board electroless plating copper drying device of claim 3, which is characterized in that: each transmission assembly (32) comprises a synchronous chain (321) and two driven gears (322), the two driven gears (322) are respectively fixed on one end of each of the two adjacent driven shafts (27), and the synchronous chain (321) is sleeved on the two driven gears (322).

5. The circuit board electroless plating copper drying device of claim 1, which is characterized in that: the filter unit (8) comprises a connecting pipe (81) and an air pump (82), the two ends of the connecting pipe (81) are respectively communicated with the input ends of the tank body (1) and the air pump (82), a first layer of particle adsorption layer (83), a second layer of alkaline substance adsorption layer (84), a third layer of acidic substance adsorption layer (85) and a fourth layer of air filter layer (86) are sequentially arranged in the length direction of the connecting pipe (81), and the air pump (82) is arranged beside the bearing support (4).

6. The circuit board electroless plating copper drying device of claim 4, which is characterized in that: the number of the supporting cross rods (26) is the same as that of the supporting boxes (61), and six supporting cross rods (26) and six supporting boxes (61) are arranged.

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