Circuit board drying device

Abstract

The utility model discloses a circuit board drying device which comprises a box body, a transmission device arranged in the box body and used for conveying a circuit board, a linear air knife arranged above the transmission device, a dust collection box arranged in the box body and located at the bottom of the box body, and an air heater arranged below the box body. An air outlet pipe of the air heater is connected with the linear air knife, a dust adsorption layer is arranged in the dust collection box, and the dust collection box is connected with the box body in a drawing mode. According to the circuit board drying device provided by the utility model, the circuit board can be prevented from being secondarily polluted by dust, and the drying efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the technical field of printed circuit board processing equipment, and specifically to a circuit board drying device. Background Technology

[0002] The manufacturing process of printed circuit boards (PCBs) includes a drying step, which is mainly used to remove moisture from the surface of the PCBs. Existing PCB drying boxes include a box body, a conveying mechanism, and a drying device. The conveying mechanism is used to transport the PCBs, and the drying device is used to blow air onto the PCBs transported by the conveying mechanism to remove moisture from the surface of the PCBs.

[0003] In the prior art, Chinese patent (CN212431535U) discloses a drying oven for circuit boards. This device allows operators to manually place the circuit boards to be dried onto a circuit board shelf structure. The oven's interior features these shelves, maximizing space and improving drying efficiency and quantity to some extent. However, it suffers from the following problems: 1. Manually placing the circuit boards onto the shelves is laborious and inefficient, resulting in low drying efficiency. 2. During circuit board manufacturing, wear on parts (e.g., wear on the conveyor mechanism) and dirt falling from the workpiece surface create dust on the circuit board surface. When the drying fan blows this dust, it easily settles back onto the board, causing secondary contamination and affecting its quality.

[0004] Therefore, it is necessary to provide a new dry plate device to solve the above-mentioned technical problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a circuit board drying device that can avoid secondary dust contamination of the circuit board and improve drying efficiency.

[0006] The technical solution of this utility model is as follows:

[0007] A circuit board drying device includes a housing, a conveying device for conveying circuit boards disposed within the housing, a linear air knife disposed above the conveying device, a dust collection box disposed within the housing and located at its bottom, and a hot air blower disposed below the housing; the air outlet pipe of the hot air blower is connected to the linear air knife, the dust collection box is provided with a dust adsorption layer, and the dust collection box is connected to the housing by a pull-out type.

[0008] Furthermore, the hot air blower is equipped with an air filter on its air outlet pipe.

[0009] Furthermore, the conveying device is one of stainless steel mesh belt conveyor, stainless steel chain conveyor, and roller conveyor.

[0010] Furthermore, the dust adsorption layer is adhesive paper or adhesive.

[0011] Furthermore, the bottom plate or side wall of the housing is provided with a slide rail, and the bottom of the dust collection box is provided with rollers, and the dust collection box slides along the slide rail.

[0012] Furthermore, the linear air knife is located near the discharge end of the conveying device, and the linear air knife consists of 2-3 rows, which are spaced apart.

[0013] Furthermore, the airflow direction of at least one set of linear air knives is towards the feed end of the conveying device, and the angle between them and the circuit board is 25-45°. The airflow direction of at least one set of linear air knives is perpendicular to the circuit board.

[0014] Furthermore, the distance between the linear air knife with the airflow direction perpendicular to the circuit board and the outlet of the housing is less than the distance between the linear air knife with the airflow direction inclined and the outlet of the housing.

[0015] Compared with the prior art, the circuit board drying device provided by this utility model has the following advantages:

[0016] I. The circuit board drying device provided by this utility model has a dust collection box inside the box, and a dust adsorption layer is provided inside the dust collection box. The dust is collected in the dust collection box at the bottom of the box under the action of gravity, and is adsorbed by the dust adsorption layer, which can prevent the collected dust from being re-flying under the action of airflow, and further prevent the dust from causing secondary pollution to the circuit board.

[0017] II. The circuit board drying device provided by this utility model has 2-3 rows of linear air knives close to the discharge end of the conveying device, which are spaced apart to ensure the drying effect of the circuit board; the dried circuit board is then conveyed to the outside of the box to ensure that the circuit board is not contaminated by dust inside the box.

[0018] III. The circuit board drying device provided by this utility model has at least one set of linear air knives whose airflow direction is towards the feed end of the conveying device, with an angle of 25-45° between them and the circuit board. At least one set of linear air knives also has its airflow direction perpendicular to the circuit board. The inclined linear air knives not only blow away moisture from the circuit board but also remove impurities, preventing dust blown up during the drying process from settling on the dried circuit board. The linear air knives perpendicular to the circuit board enable rapid drying, allowing moisture in the holes of the circuit board to evaporate quickly. Therefore, the combination of these two types of linear air knives not only achieves rapid drying of the circuit board but also prevents secondary contamination of the dried circuit board by dust.

[0019] IV. The circuit board drying device provided by this utility model has a pull-out connection between the dust collection box and the housing, making it easy to clean the dust collection box. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the circuit board dry board device of this utility model. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions in the embodiments of this utility model, and to make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be further described below in conjunction with the accompanying drawings.

[0023] It should be noted that the descriptions of these embodiments are for the purpose of aiding understanding of the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] Please see Figure 1 This is a structural schematic diagram of the circuit board drying device of this utility model. The circuit board drying device of this utility model includes a housing 1, a transmission device 2 disposed inside the housing 1, a linear air knife 3 and a dust collection box 4, and a hot air blower 5 disposed below the housing 1. The linear air knife 3 is located above the transmission device, and the dust collection box 4 is located at the bottom of the housing.

[0025] The housing 1 has conveying ports (not shown) at both ends, namely the inlet and outlet, which connect to the preceding and following processes of the drying process, allowing the circuit board to be conveyed from the previous process to the housing 1 through the inlet for drying, and then output from the outlet to the next process. A dust collection box mounting opening (not shown) is located on one side of the housing 1 near its bottom plate. The width of the dust collection box mounting opening is approximately the same as the width of the dust collection box 4, and correspondingly, its height is approximately the same as the height of the dust collection box 4. Preferably, the width of the dust collection box mounting opening is approximately the same as the length or width of the housing 1, that is, the dust collection box is approximately the same size as the bottom plate of the housing 1, resulting in better dust collection.

[0026] Conveying device 2 transports the circuit board from the inlet to the outlet. Figure 1 The direction of the middle arrow indicates the direction of circuit board conveying. The circuit board is dried during the conveying process inside the box. In this invention, the conveying device is one of a stainless steel mesh belt conveyor, a stainless steel chain conveyor, or a roller conveyor.

[0027] The linear air knife 3 is connected to the air outlet duct 6 of the hot air blower 5. By supplying hot air into the chamber, the temperature inside the chamber is maintained at 85℃±5℃, allowing moisture on the circuit board to evaporate quickly. Preferably, the air outlet duct 6 is equipped with an air filter 7 to filter the hot air, removing moisture and impurities to avoid interfering with the quality of the circuit board.

[0028] In this embodiment, the linear air knives 3 are arranged in 2-3 rows at intervals to improve drying efficiency. The linear air knives 3 are positioned near the discharge end of the conveying device, allowing the circuit board to be dried close to the discharge end. The dried circuit board is then quickly conveyed to the next process, preventing secondary contamination from dust inside the enclosure. At least one set of linear air knives directs airflow towards the inlet end of the conveying device at an angle of 25-45° to the circuit board, while at least one set directs airflow perpendicular to the circuit board. The inclined linear air knives not only remove moisture from the circuit board but also remove impurities, preventing dust blown up during the drying process from settling on the dried circuit board. The linear air knives perpendicular to the circuit board enable rapid drying, allowing moisture in the holes to evaporate quickly. Therefore, the combination of these two types of linear air knives not only achieves rapid drying of the circuit board but also prevents secondary contamination from dust. Preferably, the distance between the linear air knife with the airflow direction perpendicular to the circuit board and the outlet of the housing is less than the distance between the linear air knife with the airflow direction inclined and the outlet of the housing, that is, the circuit board is first swept by oblique hot air and then dried by vertical hot air.

[0029] In this invention, the dust collection box 4 is installed into the housing 1 through the dust collection box installation port, and the dust collection box 4 and the housing are connected by a pull-out method. Preferably, a handle (not shown) is provided on the dust collection box to facilitate the application of force. Specifically, a slide rail is provided on the bottom plate or side wall of the housing 1, and a roller that cooperates with the slide rail is provided at the bottom of the dust collection box 4. The roller slides along the slide rail to push the dust collection box into the housing or pull the dust collection box out of the housing, making the pushing and pulling of the dust collection box easier. Alternatively, the dust collection box can be directly supported on the bottom plate of the housing 1. It should be noted that the dust collection box in this invention has an open structure.

[0030] The dust collection box 4 is equipped with a dust adsorption layer 8, which is used to adsorb the dust after it falls, preventing it from floating inside the box under the action of airflow and affecting the quality of the circuit board. In addition, by collecting the dust, the air knife, conveying device and other components inside the box will not be covered with dust, thereby reducing the cleaning process of the components inside the box. The dust adsorption layer 8 can be adhesive paper or adhesive, which is convenient to replace and clean.

[0031] The circuit board drying device provided by this utility model can avoid secondary contamination of circuit boards by dust and improve drying efficiency.

[0032] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A circuit board drying device, characterized in that, The device includes a housing, a transmission device for conveying circuit boards disposed within the housing, a linear air knife disposed above the transmission device, a dust collection box disposed within the housing and located at its bottom, and a hot air blower disposed below the housing; the air outlet pipe of the hot air blower is connected to the linear air knife, the dust collection box is provided with a dust adsorption layer, and the dust collection box is connected to the housing by a pull-out type.

2. The circuit board drying device according to claim 1, characterized in that, An air filter is installed on the air outlet pipe of the hot air blower.

3. The circuit board drying device according to claim 1, characterized in that, The transmission device is one of stainless steel mesh belt conveyor, stainless steel chain conveyor, or roller conveyor.

4. The circuit board drying device according to claim 1, characterized in that, The dust-absorbing layer is adhesive paper or adhesive.

5. The circuit board drying device according to claim 1, characterized in that, The bottom plate or side wall of the housing is provided with a slide rail, and the bottom of the dust collection box is provided with rollers, and the dust collection box slides along the slide rail.

6. The circuit board drying apparatus according to any one of claims 1-5, characterized in that, The linear air knife is located near the discharge end of the conveying device, and there are 2-3 rows of linear air knives, which are spaced apart.

7. The circuit board drying device according to claim 6, characterized in that, At least one set of linear air knives has its airflow direction facing the feed end of the conveying device, with an angle of 25-45° between it and the circuit board, and the airflow direction of at least one set of linear air knives is perpendicular to the circuit board.

8. The circuit board drying device according to claim 7, characterized in that, The distance between a linear air knife with airflow direction perpendicular to the circuit board and the outlet of the housing is less than the distance between a linear air knife with airflow direction inclined and the outlet of the housing.

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