A general-purpose PCB board wax dipping device

Abstract

The present invention relates to a general-purpose PCB board wax dipping device, which includes a frame. Inside the frame, there is a chain conveyor for conveying multiple PCB boards and a wax furnace for dipping the multiple PCB boards in wax. By using this general-purpose PCB board wax dipping device to replace manual wax dipping, the wax dipping time can be controlled, the working efficiency is high, the operation is simple. At least a part of the chain conveyor between the loading end and the unloading end is recessed into the wax furnace, and the recessed part is immersed in the wax liquid. Therefore, the liquid level of the wax liquid is above the recessed part of the chain conveyor. When the PCB board passes through the wax furnace, the wax liquid can easily adhere to the PCB board to complete wax dipping. By providing a cold air blower at the unloading end, when the wax on the PCB board is cooled and quickly solidified by the cold air blower, it is not easy to adhere to the chain conveyor and is easy to flow out from the discharging assembly, improving the wax dipping efficiency of the PCB board and greatly reducing the labor cost.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic product wax dipping equipment, and more specifically, to a general-purpose PCB board wax dipping device. Background Art

[0002] The PCB board wax dipping process is one of the processes with low cost and good protection effect in the three-proof processes. However, the existing circuit board wax dipping machines are generally operated manually. The staff uses manual tools to dip the printed circuit board into the wax liquid. Not only the wax dipping time cannot be guaranteed, but also it is easy to stick the boards if they are not separated in time after wax dipping. Moreover, the excess wax attached to the PCB board will also affect the use effect of the PCB board. The labor cost is high and the wax dipping efficiency is low, which greatly reduces the production efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a general-purpose PCB board wax dipping device in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a general-purpose PCB board wax dipping device, including a frame. One end of the frame is a loading end, and the other end is an unloading end. A chain conveyor belt for conveying multiple PCB boards, a wax furnace for dipping the multiple PCB boards in wax, and a driving assembly for driving the chain conveyor belt to move successively at the loading end, the wax furnace, and the unloading end are arranged inside the frame. The wax furnace includes a box body for storing wax liquid and a heating assembly for heating the wax liquid. The loading end and the unloading end are respectively located above both sides of the wax furnace. At least a part of the chain conveyor belt between the loading end and the unloading end is recessed into the wax furnace, and the recessed part is immersed in the wax liquid. A first reflux assembly for allowing the excess wax liquid on the PCB board to flow back to the wax furnace and a hot air blower for blowing hot air on the first reflux assembly are arranged between the unloading end and the wax furnace. A cold air blower for blowing cold air on the PCB board and a discharging assembly for cooperating with the chain conveyor belt for discharging are arranged at the unloading end.

[0005] In the general-purpose PCB board wax dipping device of the present invention, an adjusting assembly for adjusting the tension of the chain conveyor belt and the depth of the chain conveyor belt in the wax liquid is further arranged above the wax furnace.

[0006] In the general-purpose PCB board wax dipping device of the present invention, an air outlet for discharging the oil fume generated when the wax furnace is heated is further arranged on the frame.

[0007] In the general-purpose PCB board wax dipping device of the present invention, a second reflux assembly for allowing the excess wax liquid to flow back to the wax furnace is arranged between the loading end and the wax furnace.

[0008] The universal PCB board wax dipping device of the present invention, wherein the chain conveyor is further provided with a plurality of baffles to prevent the PCB board from sliding on the chain conveyor; one side of the baffle is bent upward to extend with a plurality of protrusions;

[0009] The universal PCB board wax dipping device of the present invention, wherein the first reflow assembly and the second reflow assembly both include a reflow plate; the two reflow plates are bent downward at one end facing the wax furnace to have a first connecting portion extending therefrom; the two first connecting portions are in contact with the inner wall of the wax furnace; the two sides of the reflow plate are bent upward to have a second connecting portion extending therefrom; the second connecting portion is fixedly connected to the frame by a first fastener;

[0010] The universal PCB board wax dipping device of the present invention, wherein the driving assembly comprises two oppositely arranged main sprockets, a plurality of first slave sprockets matched with the main sprockets, and a servo motor driving any of the main sprockets to rotate; the two main sprockets are connected by a first connecting shaft; the two opposite slave sprockets are connected by a second connecting shaft; the two main sprockets and the plurality of first slave sprockets are all meshed with the chain conveyor belt;

[0011] The universal PCB board wax dipping device of the present invention, wherein the adjusting components are at least two groups, and the two groups of adjusting components are respectively located on two opposite sides of the chain conveyor belt;

[0012] The universal PCB board wax dipping device of the present invention, wherein the adjusting assembly comprises a second slave sprocket meshed with the chain conveyor, a tensioning wheel drivingly connected to the second slave sprocket, and a threaded screw driving the tensioning wheel and the second slave sprocket to rise and fall on the wax furnace;

[0013] The universal PCB board wax dipping device described in the present invention, wherein the discharge assembly includes a guide plate for multiple PCB boards to pass through; the guide plate is inclined downward and outward; the guide plate is provided with a plurality of openings adapted to the protrusions and corresponding one-to-one to the plurality of protrusions on one side facing the discharge end; both side edges of the guide plate are respectively bent upward to extend a third connection portion; the third connection portion is fixedly connected to the frame by a second fastener.

[0014] The beneficial effects of the present invention are as follows: By replacing manual wax dipping with this general-purpose PCB board wax dipping device, the wax dipping time is controllable, the work efficiency is high, the operation is simple. Workers place the PCB boards to be wax dipped on the chain conveyor belt, and the driving component drives the chain conveyor belt to drive multiple PCB boards to move successively at the loading end, wax furnace, and unloading end. Since at least a part of the chain conveyor belt between the loading end and the unloading end is recessed into the wax furnace, and the recessed part is immersed in the wax liquid, the liquid level of the wax liquid is above the recess of the chain conveyor belt. When the PCB board passes through the wax furnace, the wax liquid can easily adhere to the PCB board to complete wax dipping; after the PCB board passes through the wax furnace, it moves towards the unloading end above the wax furnace, and the excess wax will drip onto the first return component and finally return to the wax furnace, which can make the thickness of the wax layer on the surface of the PCB board within the required range and can also recycle the wax liquid without waste; by providing a cold air blower at the unloading end, when the wax on the PCB board is cooled by the cold air blower and quickly solidifies, it is not easy to adhere to the chain conveyor belt and is easy to flow out from the discharging component, improving the wax dipping efficiency of the PCB board and greatly reducing the labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will further illustrate the present invention in conjunction with the drawings and embodiments. The drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings:

[0016] Figure 1 is a schematic structural diagram of a general-purpose PCB board wax dipping device according to a preferred embodiment of the present invention;

[0017] Figure 2 is a schematic internal structural diagram of a general-purpose PCB board wax dipping device according to a preferred embodiment of the present invention;

[0018] Figure 3 is a schematic structural diagram of the chain conveyor belt and the wax furnace according to a preferred embodiment of the present invention;

[0019] Figure 4 is a schematic structural diagram of the adjusting component according to a preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In the description, claims and drawings of the present invention, terms such as "first", "second", "third" and "fourth" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0021] Reference to "embodiment" herein means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0022] "Plurality" means two or more. "And / or" describes the associated relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0023] Moreover, terms indicating directions such as "up, down, front, back, left, right, upper end, lower end, longitudinal" etc. are all referenced based on the attitude position of the device or equipment described in this solution during normal use.

[0024] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0025] A general PCB board wax dipping device according to a preferred embodiment of the present invention, as Figures 1-4 shown, includes a frame 11, one end of the frame 11 is a loading end 111, and the other end is an unloading end 112; a chain conveyor belt 13 for conveying a plurality of PCB boards 12 is provided inside the frame 11, a wax furnace 14 for dipping a plurality of PCB boards 12, and a driving assembly for driving the chain conveyor belt 13 to move successively at the loading end 111, the wax furnace 14 and the unloading end 112;

[0026] This chain conveyor belt can transport PCB boards of various sizes or shapes, with strong versatility. It should be noted that the chain conveyor belt can be composed of multiple chain plates spliced together, or it can be a chain mesh, or other transportation structures in the prior art. All of the above fall within the scope of protection of the present invention.

[0027] Specifically, the wax furnace 14 includes a box body 141 for storing wax liquid and a heating component 142 for heating the wax liquid; the heating component is a constant temperature box, which is prior art and will not be elaborated here; the loading end 111 and the unloading end 112 are respectively located above both sides of the wax furnace 14; making the loading end and the unloading end have a height difference with the wax furnace can enable the excess wax liquid on the PCB board and the chain conveyor belt to flow back into the wax furnace due to gravity. As Figure 3 shown, at least a part of the chain conveyor belt 13 between the loading end 111 and the unloading end 112 is recessed into the wax furnace 14, and the recessed part is immersed in the wax liquid; it should be noted that the wax liquid in the wax furnace always covers the recessed part of the chain conveyor belt, which can ensure that the PCB board on the chain conveyor belt can be completely immersed in wax; a first reflux component for the excess wax liquid on the PCB board 12 to flow back to the wax furnace 14 and a hot air blower 15 for blowing hot air on the first reflux component and the PCB board 12 on the first reflux component are provided between the unloading end 112 and the wax furnace 14; it should be noted that the hot air blower keeps the outlet temperature at about 60 °C, so that the excess wax on the PCB board and the wax on the first reflux component can have enough time to flow back into the wax furnace; a cold air blower 16 for blowing cold air on the PCB board 12 and a discharging component for cooperating with the chain conveyor belt 13 to discharge materials are provided on the unloading end 112. Both the hot air blower and the cold air blower are fans, or other structures that can blow air in the prior art.

[0028] By using this general PCB board wax dipping device to replace manual wax dipping, the wax dipping time is controllable, the working efficiency is high, and the operation is simple. Workers place the PCB boards to be wax dipped on the chain conveyor belt, and the driving component drives the chain conveyor belt to drive multiple PCB boards to move successively at the loading end, wax furnace and unloading end. Since at least a part of the chain conveyor belt between the loading end and the unloading end is recessed into the wax furnace and the recessed part is immersed in the wax liquid, the liquid level of the wax liquid is above the recessed part of the chain conveyor belt. When the PCB board passes through the wax furnace, the wax liquid can easily adhere to the PCB board to complete wax dipping; after the PCB board passes through the wax furnace, it moves towards the unloading end above the wax furnace, and the excess wax will drip onto the first reflux component and finally return to the wax furnace, which can make the thickness of the wax layer on the surface of the PCB board within the required range and can also recover the wax liquid without causing waste; by providing a cold air blower at the unloading end, when the wax on the PCB board is cooled by the cold air blower and quickly solidifies, it is not easy to adhere to the chain conveyor belt and is easy to flow out from the discharging component, improving the wax dipping efficiency of the PCB board and greatly reducing the labor cost.

[0029] Specifically, an adjusting assembly 26 for adjusting the tension of the chain conveyor belt 13 and the depth of the chain conveyor belt 13 in the wax liquid is further provided above the wax furnace 14; there are at least two groups of the adjusting assembly 26, and the two groups of the adjusting assembly 26 are respectively located on opposite sides of the chain conveyor belt 13.

[0030] Preferably, there are four groups of the adjusting assembly, with two groups on each of the opposite sides of the chain conveyor belt.

[0031] The adjusting assembly 26 includes a second driven sprocket 261 meshing with the chain conveyor belt 13, a tensioning wheel 262 drivingly connected to the second driven sprocket 261, and a threaded screw 263 driving the tensioning wheel 262 and the second driven sprocket 261 to move up and down in the wax furnace 14. The tensioning wheel is a prior art and will not be elaborated here. If the liquid level of the wax liquid is lower than the depression of the chain conveyor belt, manually rotate the threaded screw to drive the tensioning wheel and the second driven sprocket to drive the chain conveyor belt to move downward until the depression of the chain conveyor belt is lower than the liquid level of the wax liquid.

[0032] Specifically, an air outlet 17 for discharging the oil fume generated when the wax furnace 14 is heated is further provided on the frame 11. The air outlet is used to connect to an exhaust duct to extract the excess oil fume volatilized by the wax furnace heating, ensuring the quality of the wax dipping on the surface of the PCB board.

[0033] Specifically, a second return assembly for returning the excess wax liquid on the chain conveyor belt to the wax furnace 14 is provided between the loading end 111 and the wax furnace 14.

[0034] Both the first return assembly and the second return assembly include a return plate 19; one end of the two return plates 19 facing the wax furnace 14 extends downward and is bent to form a first connecting portion 191; the two first connecting portions 191 are in contact with the inner wall of the wax furnace 14; both sides of the return plate 19 extend upward and are bent to form a second connecting portion 192; the second connecting portion 192 is fixedly connected to the frame 11 through a first fastener (not shown in the figure); the structure is simple, the wax liquid will not flow to other places, it is environmentally friendly and safe to use.

[0035] Specifically, the driving assembly includes two main sprockets 20 arranged oppositely, a plurality of first driven sprockets 21 cooperating with the main sprockets 20, and a servo motor 23 driving one of the main sprockets 20 to rotate; the two main sprockets 20 are connected by a first connecting shaft 24; the two opposite driven sprockets 21 are connected by a second connecting shaft 25; the two main sprockets 20 and the plurality of first driven sprockets 21 are all meshed with the chain conveyor belt 13; the transmission effect is good, the transmission is more accurate, and the speed is controllable.

[0036] The general PCB board wax dipping device is further provided with a visual window 28, through which the staff can observe the wax dipping situation of the PCB board, facilitating the staff to discover problems in time. The general PCB board wax dipping equipment is also provided with a control console 22, which is convenient for the staff to operate.

[0037] Specifically, a plurality of baffles 18 for preventing the PCB board 12 from sliding on the chain conveyor 13 are further provided on the chain conveyor 13; a plurality of protrusions 181 are bent and extended upward on one side of the baffle 18; the PCB board is placed between the two baffles, which can prevent the PCB board from being displaced due to the movement of the chain conveyor, and avoid the PCB boards from being attached to or stacked on each other, affecting the wax dipping effect.

[0038] The discharging assembly includes a diversion plate 27 for allowing a plurality of PCB boards 12 to pass through; the diversion plate 27 is inclined downward and outward; it is convenient for the PCB boards to be discharged. A plurality of openings 271 that are adapted to the protrusions 181 and correspond to the plurality of protrusions 181 one by one are provided on the side of the diversion plate 27 facing the discharging end 112; third connecting portions 272 are bent and extended upward from the two side edges of the diversion plate 27 respectively; the third connecting portions 272 are fixedly connected to the frame 11 through second fasteners (not shown in the figure). The structure of this discharging assembly is simple and can prevent the PCB boards from falling to other places.

[0039] It should be understood that for those of ordinary skill in the art, improvements or modifications can be made according to the above description, and all such improvements and modifications should fall within the protection scope of the appended claims of the present invention.

Claims

1. A general PCB board wax dipping device, comprising a frame, characterized in that, One end of the frame is a loading end, and the other end is a unloading end; a chain conveyor for conveying a plurality of PCB boards, a wax furnace for waxing the plurality of PCB boards, and a driving component for driving the chain conveyor to move in sequence at the loading end, the wax furnace and the unloading end are arranged in the frame; the wax furnace comprises a box for storing wax liquid, and a heating component for heating the wax liquid; the loading end and the unloading end are respectively located above both sides of the wax furnace; at least a part of the chain conveyor between the loading end and the unloading end is recessed into the wax furnace, and its recessed part is immersed in the wax liquid; a first reflux component for returning excess wax liquid on the PCB board to the wax furnace, and a hot air blower blowing hot air to the first reflux component are arranged between the unloading end and the wax furnace; a cold air blower blowing cold air to the PCB board, and a discharging component cooperating with the chain conveyor for unloading are arranged on the unloading end.

2. The general PCB board wax dipping device according to claim 1, wherein An adjusting component for adjusting the tension of the chain conveyor belt and the depth of the chain conveyor belt in the wax liquid is also provided above the wax furnace.

3. The general PCB board wax dipping device according to claim 2, characterized in that, The frame is also provided with an air outlet for discharging the oil smoke generated when the wax stove is heated.

4. The general PCB board wax dipping device according to claim 1, characterized in that, A second reflux component is provided between the feeding end and the wax furnace to allow excess wax liquid to flow back to the wax furnace.

5. The general PCB board wax dipping device according to claim 4, characterized in that, The chain conveyor is also provided with a plurality of baffles for preventing the PCB board from sliding on the chain conveyor; one side of the baffle is bent upward to extend with a plurality of protrusions.

6. The general PCB board wax dipping device according to claim 4, characterized in that, The first reflux assembly and the second reflux assembly both include a reflux plate; the two reflux plates are bent downward at one end facing the wax furnace to have a first connecting portion extending therefrom; the two first connecting portions are in contact with the inner wall of the wax furnace; the two side edges of the reflux plate are respectively bent upward to have a second connecting portion extending therefrom; the second connecting portion is fixedly connected to the frame via a first fastener.

7. The general PCB board wax dipping device according to any one of claims 1-6, characterized in that, The driving assembly includes two relatively arranged main sprockets, a plurality of first slave sprockets cooperating with the main sprockets, and a servo motor driving any of the main sprockets to rotate; the two main sprockets are connected by a first connecting shaft; the two relatively first slave sprockets are connected by a second connecting shaft; the two main sprockets and the plurality of first slave sprockets are all engaged with the chain conveyor belt.

8. The general PCB board wax dipping device according to claim 2 or 3, characterized in that, There are at least two groups of adjusting components, and the two groups of adjusting components are respectively located on two opposite sides of the chain conveyor belt.

9. The general PCB board wax dipping device according to claim 8, characterized in that, The adjusting assembly comprises a second slave sprocket meshed with the chain conveyor, a tensioning wheel drivingly connected to the second slave sprocket, and a threaded screw driving the tensioning wheel and the second slave sprocket to rise and fall on the wax furnace.

10. The general PCB board wax dipping device according to claim 5, characterized in that, The discharge assembly includes a guide plate for the passage of multiple PCB boards; the guide plate is inclined downward and outward; a side of the guide plate facing the discharge end is provided with multiple openings that are adapted to the protrusions and correspond one-to-one to the multiple protrusions; both side edges of the guide plate are bent upward to extend a third connecting portion; the third connecting portion is fixedly connected to the frame by a second fastener.

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