Cleaning apparatus

Abstract

The present application relates to the technical field of printed circuit board solder resist re-washing, and particularly relates to a cleaning device. The cleaning device provided by the present application comprises a soaking device, a spraying device and a roller group. The roller group comprises a plurality of rollers arranged at intervals along a first direction, and the rollers are used for conveying printed circuit boards to be cleaned. The soaking device comprises a soaking tank used for containing cleaning liquid, and the rollers corresponding to the soaking tank are located in the soaking tank. The spraying device comprises an upper nozzle and a lower nozzle. In the cleaning process, the printed circuit boards to be cleaned are placed on the roller group, and under the driving of the roller group, the printed circuit boards to be cleaned are sequentially soaked in the soaking tank and sprayed by the spraying device, and then the cleaned printed circuit boards are conveyed out. The cleaning device provided by the present application reduces the labor intensity of workers, improves the production efficiency and is simple to operate in the process of cleaning the printed circuit boards, and the workers do not need to contact the production liquid in the cleaning process, so that the safety performance is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printed circuit board solder resist re-washing, and particularly relates to a cleaning device. BACKGROUND

[0002] A solder resist film is usually arranged on a printed circuit board for solder resist, protection and improvement of insulation resistance. In the process of generating the solder resist film on the printed circuit board, the printed circuit board may have a solder resist defect due to expansion and contraction of the printed circuit board, personnel operation, abnormal equipment parameters and other reasons. At this time, the printed circuit board with the solder resist defect needs to be cleaned to clean the original solder resist film.

[0003] In the prior art, the solder resist film on the printed circuit board is cleaned in a manual manner. Specifically, the printed circuit board to be cleaned is first placed on a printed circuit board holder, then the printed circuit board and the holder are placed in a soaking tank containing cleaning chemicals for a certain period of time, then the printed circuit board and the holder are taken out, then a brush is used to clean the solder resist film remaining on the surface of the printed circuit board, and finally the residues and chemicals on the printed circuit board are washed away with clean water.

[0004] However, the manual cleaning manner has low cleaning efficiency and high labor intensity. SUMMARY

[0005] The present application provides a cleaning device and a solder resist re-washing method, which can effectively solve the above or other potential technical problems.

[0006] A first aspect of the present application is to provide a cleaning device, which comprises a soaking device, a spraying device and a roller group. The roller group comprises a plurality of rollers arranged at intervals along a first direction, and the rollers are used to convey the printed circuit board to be cleaned, and the first direction is the forward direction of the printed circuit board. The soaking device and the spraying device are arranged in sequence along the first direction. The soaking device comprises a soaking tank for containing cleaning chemicals, and the roller corresponding to the soaking tank is located in the soaking tank. The spraying device comprises an upper nozzle and a lower nozzle, and the upper nozzle is located above the corresponding roller, and the lower nozzle is located below the corresponding roller.

[0007] In an optional embodiment according to the first aspect, the soaking tank comprises a first soaking tank and a second soaking tank arranged in sequence along the first direction. It should be noted that the first soaking tank and the second soaking tank are arranged in sequence along the first direction, so that the printed circuit board to be cleaned can be soaked twice, thereby ensuring the soaking time and further facilitating the cleaning of the printed circuit board to be cleaned.

[0008] In an optional embodiment according to the first aspect, the soaking device further comprises: a first medicine tank and a second medicine tank; the first soaking tank is provided with an overflow port, and the overflow port is in communication with the first medicine tank; the first medicine tank is further provided with a water pump for conveying the medicine in the first medicine tank into the first soaking tank; the second soaking tank is provided with an overflow port, and the overflow port is in communication with the second medicine tank; the second medicine tank is further provided with a water pump for conveying the medicine in the second medicine tank into the second soaking tank. It should be noted that the first medicine tank is provided, and the first soaking tank is provided with an overflow port in communication with the first medicine tank; the first medicine tank is further provided with a water pump for conveying the medicine in the first medicine tank into the first soaking tank, so as to facilitate the flow of the medicine in the first medicine tank into the first soaking tank through the water pump; when the medicine in the first soaking tank is higher than the overflow port, the medicine will flow from the first soaking tank into the first medicine tank through the overflow port, thereby realizing the circulation of the medicine in the first medicine tank and the medicine in the first soaking tank, and further ensuring that the amount of the medicine is sufficient for soaking the printed circuit board to be cleaned, while the circulation ensures the freshness of the medicine and maintains the activity of the medicine. Similarly, the second medicine tank is provided, and the second soaking tank is provided with an overflow port in communication with the second medicine tank; the second medicine tank is further provided with a water pump for conveying the medicine in the second medicine tank into the second soaking tank, so as to facilitate the flow of the medicine in the second medicine tank into the second soaking tank through the water pump; when the medicine in the second soaking tank is higher than the overflow port, the medicine will flow from the second soaking tank into the second medicine tank through the overflow port, thereby realizing the circulation of the medicine in the first medicine tank and the medicine in the second soaking tank, and further ensuring that the amount of the medicine is sufficient for soaking the printed circuit board to be cleaned, while the circulation ensures the freshness of the medicine and maintains the activity of the medicine.

[0009] In an optional embodiment according to the first aspect, the soaking device further comprises: a first medicine tank and a second medicine tank; the first soaking tank is provided with an overflow port, and the overflow port is in communication with the first medicine tank; the first medicine tank is further provided with a water pump for conveying the medicine in the first medicine tank into the first soaking tank; the second soaking tank is provided with an overflow port, and the overflow port is in communication with the second medicine tank; the second medicine tank is further provided with a water pump for conveying the medicine in the second medicine tank into the second soaking tank. It should be noted that the first medicine tank is provided, and the first soaking tank is provided with an overflow port in communication with the first medicine tank; the first medicine tank is further provided with a water pump for conveying the medicine in the first medicine tank into the first soaking tank, so as to facilitate the flow of the medicine in the first medicine tank into the first soaking tank through the water pump; when the medicine in the first soaking tank is higher than the overflow port, the medicine will flow from the first soaking tank into the first medicine tank through the overflow port, thereby realizing the circulation of the medicine in the first medicine tank and the medicine in the first soaking tank, and further ensuring that the amount of the medicine is sufficient for soaking the printed circuit board to be cleaned, while the circulation ensures the freshness of the medicine and maintains the activity of the medicine. Similarly, the second medicine tank is provided, and the second soaking tank is provided with an overflow port in communication with the second medicine tank; the second medicine tank is further provided with a water pump for conveying the medicine in the second medicine tank into the second soaking tank, so as to facilitate the flow of the medicine in the second medicine tank into the second soaking tank through the water pump; when the medicine in the second soaking tank is higher than the overflow port, the medicine will flow from the second soaking tank into the second medicine tank through the overflow port, thereby realizing the circulation of the medicine in the first medicine tank and the medicine in the second soaking tank, and further ensuring that the amount of the medicine is sufficient for soaking the printed circuit board to be cleaned, while the circulation ensures the freshness of the medicine and maintains the activity of the medicine.

[0010] In an optional embodiment according to the first aspect, the liquid supplementing device comprises a first bath, a second bath, a front sensor, a rear sensor, a counter and a controller; the first bath is in communication with the first chemical tank, and the second bath is in communication with the second chemical tank; the front sensor is arranged at the inlet end of the roller group, and the rear sensor is arranged at the outlet end of the roller group; the counter is in communication connection with the front sensor and the rear sensor, and is used for counting the printed circuit boards passing through the roller group according to the signals of the front sensor and the rear sensor; the controller controls the first bath to supplement the first amount of chemical liquid into the first chemical tank and controls the second bath to supplement the second amount of chemical liquid into the second chemical tank in response to the signal of the counter. It should be noted that, in the cleaning process, the printed circuit boards passing through the roller group are counted according to the signals of the front sensor and the rear sensor, and when the printed circuit boards to be cleaned reach a preset number, the controller controls the first bath to supplement the first amount of chemical liquid into the first chemical tank and controls the second bath to supplement the second amount of chemical liquid into the second chemical tank. In this way, it is ensured that after a certain number of printed circuit boards to be cleaned are cleaned, the liquid supplementing device will automatically add chemical liquid into the first chemical tank or the second chemical tank, thereby ensuring the sufficiency of the chemical liquid and the activity of the chemical liquid, and more reasonably soaking the printed circuit boards to be cleaned.

[0011] In an optional embodiment according to the first aspect, the liquid supplementing device further comprises a first medicine temporary storage box, a second medicine temporary storage box, a first liquid level sensor and a second liquid level sensor; the first medicine bath is communicated with the first medicine tank through the first medicine temporary storage box, and the second medicine bath is communicated with the second medicine tank through the second medicine temporary storage box; the first liquid level sensor is arranged in the first medicine temporary storage box; the controller supplements the first amount of medicine into the first medicine temporary storage box in response to the signal of the counter; the controller further supplements the medicine in the first medicine temporary storage box into the first medicine tank in response to the full signal sent by the first liquid level sensor; the second liquid level sensor is arranged in the second medicine temporary storage box; the controller supplements the second amount of medicine into the second medicine temporary storage box in response to the signal of the counter; the controller further supplements the medicine in the second medicine temporary storage box into the second medicine tank in response to the full signal sent by the second liquid level sensor. It should be noted that the first medicine temporary storage box and the first liquid level sensor are arranged to facilitate the controller to supplement the first amount of medicine into the first medicine temporary storage box in response to the signal of the counter; meanwhile, the controller further supplements the medicine in the first medicine temporary storage box into the first medicine tank in response to the full signal sent by the first liquid level sensor, that is, to ensure that the amount of medicine supplemented into the first medicine tank each time is fixed, thereby ensuring the stability of the soaking process. Similarly, the second medicine temporary storage box and the second liquid level sensor are arranged to facilitate the controller to supplement the second amount of medicine into the second medicine temporary storage box in response to the signal of the counter; meanwhile, the controller further supplements the medicine in the second medicine temporary storage box into the second medicine tank in response to the full signal sent by the second liquid level sensor, that is, to ensure that the amount of medicine supplemented into the second medicine tank each time is fixed, thereby ensuring the stability of the soaking process.

[0012] In an optional embodiment according to the first aspect, the upper nozzle comprises a first upper nozzle perpendicular to the first direction and a second upper nozzle at an acute angle with the first direction; the lower nozzle comprises a first lower nozzle perpendicular to the first direction and a second lower nozzle at an acute angle with the first direction; the first upper nozzle and the first lower nozzle are symmetrically arranged about the first direction; the second upper nozzle and the second lower nozzle are symmetrically arranged about the first direction. It should be noted that the first upper nozzle and the first lower nozzle are both perpendicular to the first direction and are arranged on the two sides symmetrically about the first direction, that is, are respectively perpendicular to the opposite sides of the printed circuit board to be cleaned, facilitating the spray cleaning of the printed circuit board from the two sides; meanwhile, the second upper nozzle and the second lower nozzle are arranged at an acute angle with the first direction and are arranged on the two sides symmetrically about the first direction, that is, are respectively arranged along the direction inclined backward to spray clean the opposite sides of the printed circuit board to be cleaned, further ensuring the cleanliness of cleaning from different angles.

[0013] In an optional embodiment according to the first aspect, a drying device for drying the printed circuit board is further arranged downstream of the spraying device. It should be noted that the drying device for drying the printed circuit board is arranged downstream of the spraying device, so that the printed circuit board soaked and sprayed can be dried.

[0014] In an optional embodiment according to the first aspect, the drying device comprises an upper hot air dryer and a lower hot air dryer symmetrical about the first direction, and the air outlet directions of the upper hot air dryer and the lower hot air dryer are both acute to the first direction. It should be noted that in this embodiment, the drying device comprises the upper hot air dryer and the lower hot air dryer symmetrical about the first direction, and the air outlet directions of the upper hot air dryer and the lower hot air dryer are both acute to the first direction, so that the hot air can be blown from both sides of the printed circuit board symmetrically, and the air outlet directions of the upper hot air dryer and the lower hot air dryer are both acute to the first direction, so that the printed circuit board can be blown in the direction of backward inclination, thereby ensuring that the printed circuit board is dried and the residues attached thereto are blown off.

[0015] In an optional embodiment according to the first aspect, the cleaning device further comprises a front mechanical arm and a rear mechanical arm, the front mechanical arm is used to grab the printed circuit board to the roller at the inlet end of the roller set, and the rear mechanical arm is used to take the printed circuit board off the roller at the outlet end of the roller set. It should be noted that the front mechanical arm is arranged to grab the printed circuit board to be cleaned to the roller at the inlet end of the roller set, and the rear mechanical arm is arranged to take the cleaned printed circuit board off the roller at the outlet end of the roller set. Further, the mechanical operation is adopted to avoid the use of manual labor, reduce the labor intensity, and improve the work efficiency.

[0016] The cleaning device provided by the embodiments of the present disclosure comprises a soaking device, a spraying device, and a roller set. The roller set comprises a plurality of rollers arranged at intervals along a first direction, and the rollers are used to convey the printed circuit board to be cleaned, and the first direction is the forward direction of the printed circuit board. The soaking device and the spraying device are arranged in sequence along the first direction; the soaking device comprises a soaking tank for containing cleaning liquid, and the rollers corresponding to the soaking tank are located in the soaking tank; the spraying device comprises an upper nozzle and a lower nozzle, the upper nozzle is located above the corresponding roller, and the lower nozzle is located below the corresponding roller. In the cleaning process, the printed circuit board to be cleaned is placed on the roller set, and under the driving of the roller set, the printed circuit board to be cleaned is sequentially soaked in the soaking tank and sprayed by the spraying device, and then the cleaned printed circuit board is conveyed out. The cleaning device provided by the present disclosure reduces the labor intensity of the employees in the process of cleaning the printed circuit board, improves the production efficiency, is simple to operate, does not need to bear weight in the cleaning process, does not need to contact the production liquid, and improves the production safety performance.

[0017] Advantages of additional aspects of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The foregoing and other objects, features and advantages of the embodiments of the application will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 The overall structure schematic diagram of the cleaning equipment provided by the embodiments of the present disclosure is shown.

[0020] Reference Signs:

[0021] 11 - soaking device;

[0022] 111 - first soaking groove; 112 - second soaking groove;

[0023] 113 - first medicine groove; 114 - second medicine groove;

[0024] 115 - first bath building groove; 116 - second bath building groove;

[0025] 117 - first medicine temporary storage box; 118 - second medicine temporary storage box;

[0026] 13 - spraying device;

[0027] 131 - first upper spray head; 133 - second upper spray head;

[0028] 15 - drying device. DETAILED DESCRIPTION

[0029] Embodiments of the present application are described in detail below with reference to the attached drawings, which show by way of example and not limitation a number of embodiments of the present application. The same or similar elements are denoted by the same or similar reference signs throughout the drawings.

[0030] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "inner", "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0031] In addition, the terms "first", "second", etc. are used only for descriptive purposes and do not connote or imply relative importance or a quantity of the indicated technical features. Thus, a feature defined with "first", "second", etc. can include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited.

[0032] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0034] In the prior art, the solder resist film on the printed circuit board is usually cleaned manually. Specifically, first, the printed circuit board to be cleaned is placed on a printed circuit board rack, then the printed circuit board and the rack are placed in a soaking tank containing cleaning chemicals for a certain period of time, then the printed circuit board and the rack are taken out, then the solder resist film remaining on the surface of the printed circuit board is brushed clean with a brush, and finally the residue and chemicals on the printed circuit board are washed away with clean water.

[0035] This manual cleaning method not only has low cleaning efficiency, but also has high labor intensity. Since the solder resist printed circuit board to be cleaned needs to be inserted or threaded, it is easy to cause scratches on the printed circuit board during manual production and handling, resulting in scrap. The solder resist film on the printed circuit board cannot be removed directly and needs to be brushed clean manually.

[0036] Therefore, the cleaning equipment provided by the embodiments of the present application adopts a roller group to run the printed circuit board to be cleaned, and by arranging the soaking device and the spraying device on the path of the roller group, the printed circuit board to be cleaned is sequentially soaked and sprayed, without manual operation, with high work efficiency and low labor intensity.

[0037] Specifically, the cleaning equipment provided by the embodiments of the present application comprises a soaking device, a spraying device and a roller group. The roller group comprises a plurality of rollers arranged at intervals along a first direction, and the rollers are used to convey the printed circuit board to be cleaned, and the first direction is the advancing direction of the printed circuit board. The soaking device and the spraying device are sequentially arranged along the first direction. The soaking device comprises a soaking tank for containing cleaning chemical solution, and the roller corresponding to the soaking tank is located in the soaking tank. The spraying device comprises an upper nozzle and a lower nozzle, and the upper nozzle is located above the corresponding roller, and the lower nozzle is located below the corresponding roller. In the cleaning process, the printed circuit board to be cleaned is placed on the roller group, and under the transmission of the roller group, the printed circuit board to be cleaned sequentially passes through the soaking tank for soaking and the spraying device for spraying, and then the cleaned printed circuit board is conveyed out. The cleaning equipment provided by the present application reduces the labor intensity of employees, improves the production efficiency, is simple to operate, and does not need to bear weight and contact the production chemical solution in the cleaning process, thereby improving the production safety performance.

[0038] Figure 1 The overall structure diagram of the cleaning equipment provided by the embodiments of the present application is shown in FIG. 1. Figure 1 The cleaning equipment provided by the embodiments of the present application comprises a soaking device 11, a spraying device 13 and a roller group. The roller group comprises a plurality of rollers arranged at intervals along a first direction, and the rollers are used to convey the printed circuit board to be cleaned, and the first direction is the advancing direction of the printed circuit board. The soaking device 11 and the spraying device 13 are sequentially arranged along the first direction. The soaking device 11 comprises a soaking tank for containing cleaning chemical solution, and the roller corresponding to the soaking tank is located in the soaking tank. The spraying device 13 comprises an upper nozzle and a lower nozzle, and the upper nozzle is located above the corresponding roller, and the lower nozzle is located below the corresponding roller.

[0039] It should be noted that the cleaning equipment provided by the embodiments of the present application is used to clean the printed circuit board with poor solder resist, and the chemical solution contained in the soaking tank of the present application is a stripping solution. Exemplarily, the main component of the chemical solution is KOH or NaOH. The strong alkali and the solder resist film will produce loose film slag through chemical reaction. It should be noted that the color of the solder resist film is red, yellow, green, blue, purple and black, and the most common one is green, which is called green oil in the industry.

[0040] The soaking device 11 provided by the present disclosure comprises a soaking tank for containing cleaning liquid, a roller corresponding to the soaking tank is located in the soaking tank, and a printed circuit board placed on the roller can be soaked in the soaking tank. Exemplarily, the soaking tank comprises a first soaking tank 111 and a second soaking tank 112 arranged in sequence along a first direction. It should be noted that the first soaking tank 111 and the second soaking tank 112 are arranged in sequence along the first direction, so that the printed circuit board to be cleaned can be soaked twice, thereby ensuring the soaking time and further facilitating the cleaning of the printed circuit board to be cleaned. It can be understood that the specific number of the soaking tank is not limited herein, and in other specific embodiments, the number of the soaking tank can be set to other values, for example, one or three, etc.

[0041] Exemplarily, the soaking device 11 further comprises a first liquid tank 113 and a second liquid tank 114; the first soaking tank 111 is provided with an overflow port, the overflow port is communicated with the first liquid tank 113; the first liquid tank 113 is further provided with a water pump for conveying the liquid in the first liquid tank 113 into the first soaking tank 111; the second soaking tank 112 is provided with an overflow port, the overflow port is communicated with the second liquid tank 114; the second liquid tank 114 is further provided with a water pump for conveying the liquid in the second liquid tank 114 into the second soaking tank 112. It should be noted that the first liquid tank 113 is provided, and the first soaking tank 111 is provided with an overflow port, the overflow port is communicated with the first liquid tank 113; the first liquid tank 113 is further provided with a water pump for conveying the liquid in the first liquid tank 113 into the first soaking tank 111, so that the liquid in the first liquid tank 113 can flow into the first soaking tank 111 through the water pump, when the liquid in the first soaking tank 111 is higher than the overflow port, the liquid will flow from the first soaking tank 111 into the first liquid tank 113 through the overflow port, thereby realizing the circulation of the liquid in the first liquid tank 113 and the first soaking tank 111, thereby ensuring that the amount of liquid is sufficient for soaking the printed circuit board to be cleaned, and the circulation ensures the freshness of the liquid and maintains the activity of the liquid. Similarly, the second liquid tank 114 is provided, and the second soaking tank 112 is provided with an overflow port, the overflow port is communicated with the second liquid tank 114; the second liquid tank 114 is further provided with a water pump for conveying the liquid in the second liquid tank 114 into the second soaking tank 112, so that the liquid in the second liquid tank 114 can flow into the second soaking tank 112 through the water pump, when the liquid in the second soaking tank 112 is higher than the overflow port, the liquid will flow from the second soaking tank 112 into the second liquid tank 114 through the overflow port, thereby realizing the circulation of the liquid in the first liquid tank 113 and the second soaking tank 112, thereby ensuring that the amount of liquid is sufficient for soaking the printed circuit board to be cleaned, and the circulation ensures the freshness of the liquid and maintains the activity of the liquid.

[0042] In the optional example embodiment, the cleaning device provided by the present disclosure further comprises a liquid supplementing device for supplementing the liquid medicine to the first medicine tank 113 and / or the second medicine tank 114. It should be noted that the liquid supplementing device is arranged for supplementing the liquid medicine to the first medicine tank 113 and / or the second medicine tank 114.

[0043] Exemplarily, the liquid supplementing device comprises a first bath tank 115, a second bath tank 116, a front sensor, a rear sensor, a counter and a controller. The first bath tank 115 is in communication with the first medicine tank 113, and the second bath tank 116 is in communication with the second medicine tank 114; the front sensor is arranged at the inlet end of the roller group, and the rear sensor is arranged at the outlet end of the roller group; the counter is in communication connection with the front sensor and the rear sensor, and is used for counting the printed circuit boards passing through the roller group according to the signals of the front sensor and the rear sensor; the controller controls the first bath tank 115 to supplement the first amount of liquid medicine into the first medicine tank 113 and controls the second bath tank 116 to supplement the second amount of liquid medicine into the second medicine tank 114 in response to the signal of the counter. It should be noted that during the cleaning process, the printed circuit boards passing through the roller group are counted according to the signals of the front sensor and the rear sensor, and when the printed circuit boards to be cleaned reach a preset number, the controller controls the first bath tank 115 to supplement the first amount of liquid medicine into the first medicine tank 113 and controls the second bath tank 116 to supplement the second amount of liquid medicine into the second medicine tank 114. In this way, it is ensured that after a certain number of printed circuit boards to be cleaned are cleaned, the liquid supplementing device will automatically add liquid medicine into the first medicine tank 113 or the second medicine tank 114, thereby ensuring the sufficiency of the liquid medicine and the activity of the liquid medicine, and more reasonably soaking the printed circuit boards to be cleaned. Exemplarily, in the present embodiment, the number of printed circuit boards counted by the counter can be 30 to 50, that is, when 30 to 50 printed circuit boards are cleaned, the liquid supplementing device will add liquid medicine into the first medicine tank 113 and the second medicine tank 114. Exemplarily, it can be set to 40, that is, when 40 printed circuit boards are cleaned, the liquid supplementing device will add liquid medicine into the first medicine tank 113 and the second medicine tank 114.

[0044] In the alternative exemplary embodiment, the liquid supplementing device further comprises a first medicine temporary storage box 117, a second medicine temporary storage box 118, a first liquid level sensor and a second liquid level sensor; the first medicine bath tank 115 is communicated with the first medicine tank 113 through the first medicine temporary storage box 117, and the second medicine bath tank 116 is communicated with the second medicine tank 114 through the second medicine temporary storage box 118; the first liquid level sensor is arranged in the first medicine temporary storage box 117; the controller supplements the first amount of medicine into the first medicine temporary storage box 117 in response to the signal of the counter; the controller further supplements the medicine in the first medicine temporary storage box 117 into the first medicine tank 113 in response to the full signal of the first liquid level sensor; the second liquid level sensor is arranged in the second medicine temporary storage box 118; the controller supplements the second amount of medicine into the second medicine temporary storage box 118 in response to the signal of the counter; the controller further supplements the medicine in the second medicine temporary storage box 118 into the second medicine tank 114 in response to the full signal of the second liquid level sensor. It should be noted that the first medicine temporary storage box 117 and the first liquid level sensor are arranged to facilitate the controller to supplement the first amount of medicine into the first medicine temporary storage box 117 in response to the signal of the counter; meanwhile, the controller further supplements the medicine in the first medicine temporary storage box 117 into the first medicine tank 113 in response to the full signal of the first liquid level sensor, i.e. to ensure that the amount of medicine supplemented into the first medicine tank 113 is fixed each time, thereby ensuring the stability of the soaking process. Similarly, the second medicine temporary storage box 118 and the second liquid level sensor are arranged to facilitate the controller to supplement the second amount of medicine into the second medicine temporary storage box 118 in response to the signal of the counter; meanwhile, the controller further supplements the medicine in the second medicine temporary storage box 118 into the second medicine tank 114 in response to the full signal of the second liquid level sensor, i.e. to ensure that the amount of medicine supplemented into the second medicine tank 114 is fixed each time, thereby ensuring the stability of the soaking process.

[0045] The spraying device 13 provided by the present disclosure comprises an upper nozzle and a lower nozzle, the upper nozzle is located above the corresponding roller, and the lower nozzle is located below the corresponding roller. Both sides of the printed circuit board to be cleaned placed on the roller can be sprayed and washed, so as to flush away the residues and chemical liquid on the printed circuit board. For example, the upper nozzle comprises a first upper nozzle 131 perpendicular to the first direction and a second upper nozzle 133 at an acute angle with the first direction; the lower nozzle comprises a first lower nozzle perpendicular to the first direction and a second lower nozzle at an acute angle with the first direction; the first upper nozzle 131 and the first lower nozzle are symmetrically arranged about the first direction; the second upper nozzle 133 and the second lower nozzle are symmetrically arranged about the first direction. It should be noted that the first upper nozzle 131 and the first lower nozzle are both perpendicular to the first direction and are arranged on the two sides symmetrically about the first direction, that is, they are respectively perpendicular to the opposite sides of the printed circuit board to be cleaned, so as to facilitate the spraying and washing of the printed circuit board from the two sides; meanwhile, the second upper nozzle 133 and the second lower nozzle are arranged at an acute angle with the first direction and are arranged on the two sides symmetrically about the first direction, that is, they are respectively arranged to spray and wash the opposite sides of the printed circuit board along the direction inclined backward, so that the spraying and washing from different angles further ensures the cleanliness of the cleaning. For example, the included angle between the second upper nozzle 133 and the second lower nozzle and the first direction is 45°.

[0046] In an optional example embodiment, a drying device 15 for drying the printed circuit board is further arranged downstream of the spraying device 13. It should be noted that the drying device 15 for drying the printed circuit board is arranged downstream of the spraying device 13, so as to facilitate the drying of the printed circuit board after soaking and spraying. For example, the drying device 15 comprises an upper hot air dryer and a lower hot air dryer symmetrically about the first direction, and the air outlet directions of the upper hot air dryer and the lower hot air dryer are both at an acute angle with the first direction. It should be noted that in this embodiment, the drying device 15 comprises the upper hot air dryer and the lower hot air dryer symmetrically about the first direction, and the air outlet directions of the upper hot air dryer and the lower hot air dryer are both at an acute angle with the first direction, so as to facilitate the hot air drying of the printed circuit board from the two sides symmetrically about the printed circuit board, and at the same time, the air outlet directions of the upper hot air dryer and the lower hot air dryer are both at an acute angle with the first direction, so as to facilitate the blowing of the printed circuit board along the direction inclined backward, thereby ensuring the drying of the printed circuit board and blowing away the residues attached thereto. For example, in this embodiment, the included angle between the air outlet directions of the upper hot air dryer and the lower hot air dryer and the first direction is 45°.

[0047] In the alternative exemplary embodiment, the cleaning device provided by the present disclosure further comprises a front mechanical arm and a rear mechanical arm, the front mechanical arm is used to grab the printed circuit board to the rollers at the inlet end of the roller set, and the rear mechanical arm is used to take the printed circuit board from the rollers at the outlet end of the roller set. It should be noted that the front mechanical arm is provided to grab the printed circuit board to be cleaned to the rollers at the inlet end of the roller set, and the rear mechanical arm is provided to take the cleaned printed circuit board from the rollers at the outlet end of the roller set. Further, mechanical operation is adopted to avoid using manual labor, reduce labor intensity, and improve work efficiency. Exemplarily, when the front mechanical arm places the printed circuit board to be cleaned, the printed circuit boards to be cleaned can be placed at intervals, and the distance between the two printed circuit boards to be cleaned can be set to 3-5 cm.

[0048] In the alternative exemplary embodiment, the soaking device 11 and the roller set of the cleaning device provided by the present disclosure are made of strong alkali-resistant and high temperature-resistant materials, specifically, materials that can withstand 80°C high temperature, for example, PVC materials. The drying device 15 is made of high temperature-resistant materials, for example, PVC materials.

[0049] In the alternative exemplary embodiment, the cleaning device provided by the present disclosure further comprises a temperature control device, which is connected with the soaking device 11 and used to control the temperature of the soaking device 11 within the preset temperature.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0051] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present application will not further describe various possible combinations.

Claims

1. A cleaning apparatus for cleaning a solder resist film on a printed circuit board, characterized by, The cleaning device comprises a soaking device, a spraying device and a roller group; The roller group comprises a plurality of rollers arranged at intervals along a first direction, the rollers being used to transport the printed circuit board to be cleaned, the first direction being the advancing direction of the printed circuit board; The soaking device and the spraying device are arranged in sequence along the first direction; the soaking device comprises a soaking tank for containing cleaning liquid, the roller corresponding to the soaking tank being located in the soaking tank; the spraying device comprises an upper spraying head and a lower spraying head, the upper spraying head being located above the corresponding roller, and the lower spraying head being located below the corresponding roller; The soaking tank comprises a first soaking tank and a second soaking tank arranged in sequence along the first direction; The soaking device further comprises a first liquid tank and a second liquid tank; The liquid supplementing device is further provided for supplementing the first liquid tank and / or the second liquid tank with liquid; The liquid supplementing device comprises a first bath tank, a second bath tank, a front sensor, a rear sensor, a counter and a controller; The first bath tank is in communication with the first liquid tank, and the second bath tank is in communication with the second liquid tank; The front sensor is arranged at the inlet end of the roller group, and the rear sensor is arranged at the outlet end of the roller group; The counter is in communication connection with the front sensor and the rear sensor, and is used to count the printed circuit boards passing through the roller group according to the signals of the front sensor and the rear sensor; The controller controls the first bath tank to supplement the first liquid tank with a first amount of liquid in response to the signal of the counter, and controls the second bath tank to supplement the second liquid tank with a second amount of liquid in response to the signal of the counter.

2. The cleaning device according to claim 1, wherein An overflow port is arranged on the first soaking tank, the overflow port being in communication with the first liquid tank; the first liquid tank is further provided with a water pump for conveying the liquid in the first liquid tank into the first soaking tank; An overflow port is arranged on the second soaking tank, the overflow port being in communication with the second liquid tank; the second liquid tank is further provided with a water pump for conveying the liquid in the second liquid tank into the second soaking tank.

3. The cleaning apparatus according to claim 2, wherein The liquid supplementing device further comprises a first liquid temporary storage box, a second liquid temporary storage box, a first liquid level sensor and a second liquid level sensor; The first bath tank is in communication with the first liquid tank through the first liquid temporary storage box, and the second bath tank is in communication with the second liquid tank through the second liquid temporary storage box; The first liquid level sensor is arranged in the first liquid temporary storage box; the controller supplements the first liquid temporary storage box with the first amount of liquid in response to the signal of the counter; and the controller further supplements the first liquid tank with the liquid in the first liquid temporary storage box in response to the full signal of the first liquid level sensor. The second liquid level sensor is arranged in the second medicine temporary storage box; the controller supplements the second amount of medicine into the second medicine temporary storage box in response to the signal of the counter; and the controller supplements the medicine in the second medicine temporary storage box into the second medicine tank in response to the full signal of the second liquid level sensor.

4. The cleaning apparatus according to any one of claims 1 to 3, characterized in that, The upper spray head includes a first upper spray head perpendicular to the first direction and a second upper spray head at an acute angle with the first direction; The lower spray head includes a first lower spray head perpendicular to the first direction and a second lower spray head at an acute angle with the first direction; The first upper spray head and the first lower spray head are symmetrically arranged about the first direction; and the second upper spray head and the second lower spray head are symmetrically arranged about the first direction.

5. The cleaning apparatus according to any one of claims 1 to 3, characterized in that, A drying device for drying the printed circuit board is further arranged downstream of the spraying device.

6. The cleaning apparatus of claim 5, wherein, The drying device includes upper and lower hot air dryers symmetric about the first direction, and the air outlet directions of the upper and lower hot air dryers are at an acute angle with the first direction.

7. The cleaning apparatus according to any one of claims 1 to 3, characterized in that, A front mechanical arm and a rear mechanical arm are further included, the front mechanical arm is used for grabbing the printed circuit board onto the roller at the inlet end of the roller group, and the rear mechanical arm is used for taking the printed circuit board off the roller at the outlet end of the roller group.

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