Efficient hole blowing air knife

Abstract

The utility model relates to the technical field of PCB processing, and discloses an efficient hole blowing air knife which comprises a hole blowing air knife main body mechanism, the hole blowing air knife main body mechanism comprises an air knife shell, an air guide groove is formed in the air knife shell, an upper row of air outlets and a lower row of air outlets are formed in the front end of the inner side wall of the air guide groove, and the air outlets are arranged in a continuous I shape. An air inlet is formed in the center of the rear end of the inner side wall of the air guide groove, and arc-shaped chamfers matched with the exhaust outlets are arranged at the two ends of the air guide groove. According to the air knife, the ion generator is installed near the air outlet of the air knife, ions opposite to static electricity are generated, the static electricity generated by high-speed airflow is neutralized, the influence of the static electricity on the cleaning effect and electronic elements is effectively eliminated, in addition, the knife shell of the air knife is made of materials with the anti-static performance, and generation of the static electricity is reduced.

Description

Technical Field

[0001] This utility model relates to the field of PCB processing technology, specifically to a high-efficiency blow hole air knife. Background Technology

[0002] In the PCB manufacturing industry, an air knife is a device used to clean and dry holes on PCB boards. Compressed air enters the air knife and is blown out at high speed through a thin sheet of air only 0.05 mm thick. Utilizing the Coanda effect and the air knife's unique geometry, this thin air curtain can draw in 30 to 40 times its volume of ambient air, forming a thin, high-intensity, high-airflow impact curtain. This air curtain effectively removes dust, debris, moisture, and other impurities from the PCB holes, achieving both cleaning and drying.

[0003] The existing blow-hole air knife still has the following problems when in use: due to the structure and airflow distribution characteristics of the air knife, the cleaning effect of holes in different positions on the PCB board may be inconsistent. For example, the airflow intensity at both ends of the air knife may be relatively weak, resulting in incomplete cleaning of the holes at the corresponding positions. Or, at the edge of the PCB board, the airflow may be affected by the edge effect, resulting in a less effective cleaning than the middle part. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a high-efficiency blow-hole air knife, solving the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency blow-hole air knife, comprising a blow-hole air knife main body mechanism, the blow-hole air knife main body mechanism comprising an air knife shell, an air guide groove provided inside the air knife shell, two rows of exhaust ports being opened at the front end of the inner sidewall of the air guide groove, the exhaust ports being continuously arranged in an "I" shape, an air inlet being opened at the center of the rear end of the inner sidewall of the air guide groove, and arc-shaped chamfers matching the exhaust ports being provided at both ends of the air guide groove.

[0008] As a further embodiment of this utility model: a reinforcing mechanism is provided at the front end and around the periphery of the air knife shell. The reinforcing mechanism includes a reinforcing crossbeam fixedly connected to the middle position of the front end of the air knife shell. The reinforcing mechanism also includes a rectangular reinforcing frame fixedly connected to the outer side of the front end of the air knife shell. The reinforcing crossbeam is fixedly connected between the inner sidewalls of the two ends of the rectangular reinforcing frame. The reinforcing mechanism also includes a U-shaped reinforcing frame fixedly connected to the periphery of the air knife shell in a symmetrical manner. Multiple reinforcing longitudinal beams are fixedly connected between the front and rear sidewalls of the U-shaped reinforcing frame.

[0009] As a further improvement of this utility model: three ion generators are fixedly installed at equal intervals at the front end of the reinforcing beam, the three ion generators are located between two rows of exhaust vents, and the air knife shell is made of antistatic plastic material.

[0010] As a further embodiment of this utility model: two mounting seats are symmetrically fixedly connected to the bottom end of the air knife shell, and mounting holes are provided between the two side walls below the mounting seats. The two mounting seats are fixedly connected to a matching mounting sleeve at one end facing each other and located at the opening of the mounting hole. An air intake filter is fixedly installed at the opening of the air intake hole.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. In this utility model, by optimizing the design of the air knife structure, an asymmetrical air knife structure is adopted, that is, the front end of the air knife structure is provided with two rows of continuous "I"-shaped exhaust ports, and the airflow at both ends of the air knife structure is specially designed, that is, the air guide groove of the air knife structure is provided with arc-shaped chamfers matching the exhaust ports at both ends, so that the airflow is sprayed more evenly and comprehensively, thereby improving the efficiency, consistency and comprehensiveness of the cleaning effect.

[0013] 2. In this utility model, by installing an ion generator near the exhaust port of the air knife, ions opposite to static electricity are generated to neutralize the static electricity generated by the high-speed airflow, effectively eliminating the impact of static electricity on the cleaning effect and electronic components. In addition, the air knife shell is made of a material with antistatic properties to reduce the generation of static electricity. Attached Figure Description

[0014] Figure 1 The overall three-dimensional structure of this utility model Figure 1 ;

[0015] Figure 2 The overall three-dimensional structure of this utility model Figure 2 ;

[0016] Figure 3 This is a perspective view of the main structure of the blowhole air knife and the air intake filter of this utility model.

[0017] Figure 4 This is a perspective view of the reinforcement mechanism and ion generator of this utility model.

[0018] In the diagram: 1. Main body of the blowhole air knife; 2. Reinforcing mechanism; 3. Ion generator; 4. Air inlet filter; 11. Air knife housing; 12. Mounting base; 13. Fitting mounting sleeve; 14. Air guide channel; 15. Air inlet; 16. Air outlet; 21. Rectangular reinforcing frame; 22. Reinforcing crossbeam; 23. U-shaped reinforcing frame; 24. Reinforcing longitudinal beam. Detailed Implementation

[0019] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0020] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figures 1-4 In this embodiment of the utility model, a high-efficiency blow-hole air knife includes a blow-hole air knife main body mechanism 1. The blow-hole air knife main body mechanism 1 includes an air knife shell 11. An air guide groove 14 is provided inside the air knife shell 11. The front end of the inner side wall of the air guide groove 14 is provided with two rows of upper and lower exhaust ports 16. The exhaust ports 16 are arranged in a continuous "I" shape. An air inlet hole 15 is provided at the center of the rear end of the inner side wall of the air guide groove 14. The two ends of the air guide groove 14 are provided with arc-shaped chamfers that match the exhaust ports 16. The overall air knife structure design is optimized, and an asymmetrical air knife structure is adopted. That is, the front end of the air knife structure is provided with two rows of upper and lower continuous "I"-shaped exhaust ports 16. In addition, the airflow at both ends of the air knife structure is specially designed. That is, the two ends of the air guide groove 14 of the air knife structure are provided with arc-shaped chamfers that match the exhaust ports 16, so that the airflow is sprayed more evenly and comprehensively, thereby improving the efficiency, consistency and comprehensiveness of the cleaning effect.

[0023] The front end and periphery of the air knife shell 11 are provided with a reinforcement mechanism 2. The reinforcement mechanism 2 includes a reinforcement beam 22 fixedly connected to the middle position of the front end of the air knife shell 11. The reinforcement mechanism 2 also includes a rectangular reinforcement frame 21 fixedly connected to the outer side of the front end of the air knife shell 11. The reinforcement beam 22 is fixedly connected between the inner side walls of the two ends of the rectangular reinforcement frame 21. The reinforcement mechanism 2 also includes a U-shaped reinforcement frame 23 fixedly connected to the periphery of the air knife shell 11 in a front-to-back symmetrical manner. Multiple reinforcement longitudinal beams 24 are fixedly connected between the front and rear side walls of the U-shaped reinforcement frame 23.

[0024] Three ion generators 3 are fixedly installed at equal intervals at the front end of the reinforcing beam 22. The three ion generators 3 are located between the two rows of exhaust vents 16. The air knife shell 11 is made of antistatic plastic. By installing ion generators 3 near the exhaust vents 16 of the air knife, ions opposite to static electricity are generated to neutralize the static electricity generated by the high-speed airflow, effectively eliminating the impact of static electricity on the cleaning effect and electronic components. In addition, the air knife shell is made of materials with antistatic properties to reduce the generation of static electricity.

[0025] Two mounting bases 12 are symmetrically fixedly connected to the bottom end of the air knife housing 11. Mounting holes are opened between the two side walls below the mounting bases 12. The two mounting bases 12 are fixedly connected to a matching mounting sleeve 13 at one end facing each other and at the opening of the mounting hole. An air intake filter 4 is fixedly installed at the opening of the air intake hole 15. The air entering the air knife structure can be filtered through the air intake filter 4 to avoid the problem of the exhaust port 16 being blocked due to impurities in the airflow.

[0026] The working principle of this utility model is as follows: an air source can be connected through an air intake filter 4, which filters the gas entering the air knife structure. The air knife structure and the station adjustment component are fixedly installed through two mounting bases 12 and two mating mounting sleeves 13. The station adjustment component used in PCB manufacturing adjusts the position of the air knife mechanism. After the compressed air from the air source enters the air knife, it is blown out at high speed through the exhaust port 16 as a thin sheet of air. Through the Coanda effect and the special geometry of the air knife, this thin sheet of air can draw in 30 to 40 times the amount of ambient air, forming a thin, high-intensity, large-airflow impact air curtain. The air curtain can blow away dust, debris, moisture and other impurities in the PCB holes, achieving the purpose of cleaning and drying.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency orifice air knife, comprising an air knife main body mechanism (1), wherein the air knife main body mechanism (1) comprises an air knife shell (11); a wind guide groove (14) is arranged in the air knife shell (11), upper and lower rows of air outlet openings (16) are arranged on the inner side wall of the wind guide groove (14), the air outlet openings (16) are arranged in a continuous "H" shape, a gas inlet hole (15) is arranged at the center of the rear end of the inner side wall of the wind guide groove (14), and arc chamfers matching the air outlet openings (16) are arranged at both ends of the wind guide groove (14). characterized in that The front end and the peripheral side of the air knife shell (11) are provided with a reinforcing mechanism (2), the reinforcing mechanism (2) comprises a reinforcing cross beam (22) fixedly connected to the middle position of the front end of the air knife shell (11). Three ion generators (3) are fixedly installed at the front end of the reinforcing cross beam (22) in an equidistant manner, the three ion generators (3) are located between the two rows of air outlet openings (16), and the air knife shell (11) is made of antistatic plastic. The bottom end of the air knife shell (11) is fixedly connected with two mounting seats (12) in a symmetrical manner.

2. A high efficiency nozzle air blade according to claim 1, wherein: Mounting holes are arranged between the two side walls below the mounting seats (12), and a matching mounting sleeve (13) is fixedly connected to the facing end of the two mounting seats (12) and located at the opening of the mounting hole.

3. A high efficiency nozzle air blade according to claim 2, wherein: An air inlet filter (4) is fixedly installed at the opening of the air inlet hole (15).

4. The high efficiency nozzle air blade of claim 1, wherein: The reinforcing mechanism (2) further comprises a rectangular reinforcing frame (21) fixedly connected to the outer side of the front end of the air knife shell (11), and the reinforcing cross beam (22) is fixedly connected between the inner side walls at both ends of the rectangular reinforcing frame (21).

5. The high efficiency nozzle air blade of claim 1, wherein: The reinforcing mechanism (2) further comprises a U-shaped reinforcing frame (23) fixedly connected to the peripheral side of the air knife shell (11) in a front-rear symmetrical manner.

6. A high efficiency nozzle air blade according to claim 1, wherein: A plurality of reinforcing longitudinal beams (24) are fixedly connected between the front and rear side walls of the U-shaped reinforcing frame (23).

7. A high efficiency nozzle air blade according to claim 6, wherein: ​

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