Convenient-to-operate reflow soldering device for SMT (Surface Mount Technology) production

Abstract

The utility model belongs to the technical field of reflow soldering, and particularly relates to a reflow soldering device convenient to operate for SMT production, which comprises a machine body, a protective cover and a conveying belt, the protective cover is mounted at the top of the machine body, the conveying belt is mounted on the upper surface of the machine body, the protective cover is provided with an inlet and outlet of a circuit board, and lifting guide rails are arranged on two sides of the inlet and outlet. A sealing plate is slidably arranged in an inner cavity of the lifting guide rail, a first air cylinder is installed at the top of the lifting guide rail, a piston rod of the first air cylinder penetrates through the top cavity wall of the lifting guide rail to be connected with the top of the sealing plate, a lifting heating cover is movably arranged in an inner cavity of the machine body, and a resistance wire heating plate is installed at the top of an inner cavity of the lifting heating cover. A second air cylinder is mounted on the top surface of the protective cover, and a piston rod of the second air cylinder penetrates through the top cavity wall of the protective cover; during exhausting, airflow is blocked through the lifting heating cover, heat loss during solder paste heating can be reduced, the welding efficiency is improved, and electric energy loss is reduced.

Description

Technical Field

[0001] This utility model relates to the field of reflow soldering technology, specifically to a reflow soldering device for SMT production that is easy to operate. Background Technology

[0002] Reflow soldering machines are key pieces of equipment in SMT production lines, primarily used for soldering surface-mount components. Their working principle involves heating the solder paste to melt it, thus soldering the components onto the circuit board. The equipment consists of a control system, hot air system, cold air system, machine body, and transmission system, ensuring precise control and quality throughout the soldering process.

[0003] The invention patent with publication number CN216873484U discloses a reflow soldering machine for SMT production lines. It can be installed on a production line and used in conjunction with existing robotic arms to achieve streamlined SMT processes. By providing a mounting slot at the lower end of the base and installing a rotating component inside the slot, the overall angle of the reflow soldering machine can be adjusted according to the actual installation environment when it is installed on the production line. It can also better cooperate with the robotic arm for loading and unloading, thus solving the problem that most existing reflow soldering machines cannot be installed on production lines, which leads to the need for manual handling of processed components in the SMT process.

[0004] Existing reflow soldering equipment for SMT production generates toxic gases during use. When the exhaust structure removes the toxic gases, it heats the airflow on the surface of the solder paste, causing the surface temperature of the solder paste to drop and affecting the soldering efficiency. To solve the above problems, this application proposes an easy-to-operate reflow soldering equipment for SMT production. Utility Model Content

[0005] (I) Purpose of the utility model

[0006] To address the technical problems existing in the background art, this utility model proposes an easy-to-operate reflow soldering device for SMT production. During exhaust, the airflow is blocked by a lifting heating hood, which can reduce heat loss during solder paste heating, improve soldering efficiency, and reduce power consumption, thereby solving the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To solve the above technical problems, this utility model provides an easy-to-operate reflow soldering device for SMT production, including a machine body, a protective cover, and a conveyor belt. The protective cover is installed on the top of the machine body, and the conveyor belt is installed on the upper surface of the machine body. The protective cover has an inlet and outlet for the circuit board. Lifting guide rails are provided on both sides of the inlet and outlet. A sealing plate is slidably installed in the inner cavity of the lifting guide rail. A No. 1 cylinder is installed on the top of the lifting guide rail. The piston rod of the No. 1 cylinder passes through the top cavity wall of the lifting guide rail and is connected to the top of the sealing plate.

[0009] The machine body is equipped with a movable lifting heating cover. A resistance wire heating plate is installed on the top of the inner cavity of the lifting heating cover. A second cylinder is installed on the top surface of the protective cover. The piston rod of the second cylinder penetrates the top cavity wall of the protective cover and is connected to the top of the lifting heating cover.

[0010] Preferably, a guide hole is provided through the surface of the protective cover, a guide rod is inserted into the guide hole, and the bottom of the guide rod is connected to the lifting heating cover.

[0011] Preferably, a water filter box is installed on the side wall of the machine body, and the inner cavity of the water filter box is filled with filtrate.

[0012] Preferably, the protective cover has an exhaust hood on its side wall, and the exhaust hood has an exhaust pump inside its cavity, with the exhaust pumps being distributed at equal intervals.

[0013] Preferably, the exhaust hood is connected to an air guide pipe, which is inserted into the bottom of the water filter box.

[0014] Preferably, the top of the water filter box is connected to an exhaust pipe.

[0015] Preferably, the protective cover has an observation window embedded on its front side.

[0016] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0017] 1. In this utility model, during the conveying process, the No. 2 cylinder pushes the lifting heating cover to descend. The lifting heating cover covers the conveyor belt and heats the solder paste through the resistance wire heating plate. When exhausting, the lifting heating cover blocks the airflow, which can reduce the heat loss during solder paste heating, improve welding efficiency, and reduce power consumption.

[0018] 2. In this utility model, the toxic gas generated by the melting of solder paste is discharged from both sides of the lifting heating cover into the protective cover. By using an exhaust pump in conjunction with the exhaust cover, the toxic gas can be extracted from the protective cover and discharged into the water filter box through the gas guide pipe. The toxic gas is filtered by the filtrate and discharged through the exhaust pipe, which can reduce the emission of toxic gas. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a reflow soldering device for SMT production that is easy to operate according to this utility model.

[0020] Figure 2 This is a cross-sectional view of a reflow soldering device for SMT production that is easy to operate, according to this utility model.

[0021] Figure 3 This is a longitudinal sectional view of a reflow soldering device for SMT production that is easy to operate, according to this utility model.

[0022] Figure 4 This is a schematic diagram of the lifting heating cover structure of a reflow soldering device for SMT production that is easy to operate.

[0023] Figure label:

[0024] 1. Machine body; 2. Protective cover; 3. Conveyor belt; 4. Lifting guide rail; 5. Cylinder No. 1; 6. Sealing plate; 7. Lifting heating cover; 8. Resistance wire heating plate; 9. Cylinder No. 2; 10. Guide rod; 11. Water filter box; 12. Exhaust hood; 13. Exhaust pump; 14. Air guide pipe; 15. Exhaust pipe. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0026] like Figures 1-4 As shown, this utility model proposes an easy-to-operate reflow soldering device for SMT production, including a body 1, a protective cover 2, and a conveyor belt 3. The protective cover 2 is installed on the top of the body 1, and the conveyor belt 3 is installed on the upper surface of the body 1. The protective cover 2 has an inlet and outlet for the circuit board. Lifting guide rails 4 are provided on both sides of the inlet and outlet. A sealing plate 6 is slidably provided in the inner cavity of the lifting guide rail 4. A first cylinder 5 is installed on the top of the lifting guide rail 4. The piston rod of the first cylinder 5 passes through the top cavity wall of the lifting guide rail 4 and is connected to the top of the sealing plate 6.

[0027] The inner cavity of the machine body 1 is provided with a lifting heating cover 7. A resistance wire heating plate 8 is installed on the top of the inner cavity of the lifting heating cover 7. A second cylinder 9 is installed on the top surface of the protective cover 2. The piston rod of the second cylinder 9 penetrates the top cavity wall of the protective cover 2, and the piston rod of the second cylinder 9 is connected to the top of the lifting heating cover 7.

[0028] It should be noted that the circuit board is placed on the conveyor belt 3 through the feed port at the end of the protective cover 2. After feeding, the first cylinder 5 pushes the sealing plate 6 to descend under the guidance of the lifting guide rail 4. The sealing plate 6 seals the inlet and outlet at both ends of the protective cover 2 to reduce the leakage of toxic gases during the welding process. The circuit board is transported by the conveyor belt 3. During the transport process, the second cylinder 9 pushes the lifting heating cover 7 to descend. The lifting heating cover 7 covers the conveyor belt 3 and heats the solder paste through the resistance wire heating plate 8. After the solder paste melts, it is adsorbed onto the soldering pins of the circuit board. When venting, the lifting heating cover 7 blocks the airflow, which can reduce the heat loss during solder paste heating, improve welding efficiency, and reduce power consumption.

[0029] In this embodiment, as Figure 1 As shown, a guide hole is provided through the surface of the protective cover 2, and a guide rod 10 is inserted into the guide hole. The bottom of the guide rod 10 is connected to the lifting heating cover 7.

[0030] It should be noted that the guide rod 10 can guide the lifting and lowering of the heating cover 7.

[0031] In this embodiment, as Figure 3 As shown, a water filter box 11 is installed on the side wall of the body 1, and the inner cavity of the water filter box 11 is filled with filter liquid. An exhaust hood 12 is provided on the side wall of the protective cover 2. An exhaust pump 13 is provided in the inner cavity of the exhaust hood 12. The exhaust pumps 13 are distributed at equal intervals. An air guide pipe 14 is connected to the exhaust hood 12. The air guide pipe 14 is inserted into the bottom of the inner cavity of the water filter box 11. An exhaust pipe 15 is connected to the top of the water filter box 11.

[0032] It should be noted that the toxic gases generated by the melting of solder paste are discharged from both sides of the lifting heating cover 7 into the protective cover 2. By using the exhaust pump 13 in conjunction with the exhaust cover 12, the toxic gases can be extracted from the protective cover 2 and discharged into the water filter box 11 through the air guide pipe 14. The toxic gases are filtered by the filter liquid and discharged through the exhaust pipe 15, which can reduce the emission of toxic gases.

[0033] In this embodiment, as Figure 1 As shown, the protective cover 2 has an observation window embedded on its front.

[0034] It should be noted that the observation window allows for convenient monitoring of the welding process.

[0035] The working principle and usage process of this utility model are as follows: The circuit board is placed on the conveyor belt 3 through the feed port at the end of the protective cover 2. After feeding, the first cylinder 5 pushes the sealing plate 6 to descend under the guidance of the lifting guide rail 4. The sealing plate 6 seals the inlet and outlet at both ends of the protective cover 2 to reduce the leakage of toxic gases during the welding process. The circuit board is transported by the conveyor belt 3. During the transport process, the second cylinder 9 pushes the lifting heating cover 7 to descend. The lifting heating cover 7 covers the conveyor belt 3, and the solder paste is heated by the resistance wire heating plate 8, melting the solder paste. The solder paste is then adsorbed onto the soldering pins of the circuit board. The toxic gases generated by the melting of the solder paste are discharged from both sides of the lifting heating cover 7 into the protective cover 2. The exhaust pump 13, in conjunction with the exhaust cover 12, can extract the toxic gases from the protective cover 2 and discharge them into the water filter tank 11 through the air guide pipe 14. The toxic gases are filtered by the filtration liquid and discharged through the exhaust pipe 15, which can reduce the emission of toxic gases. At the same time, the airflow is blocked by the lifting heating cover 7 during exhaust, which can reduce the heat loss during solder paste heating, improve soldering efficiency, and reduce power consumption.

[0036] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims or their equivalents.

Claims

1. An easy-to-operate reflow soldering apparatus for SMT production, comprising a body (1), a protective cover (2), and a conveyor belt (3), wherein the protective cover (2) is mounted on the top of the body (1), the conveyor belt (3) is mounted on the upper surface of the body (1), and the protective cover (2) has an inlet and outlet for circuit boards, characterized in that, The inlet and outlet are provided with lifting guide rails (4), and the inner cavity of the lifting guide rail (4) is provided with a sealing plate (6). A cylinder (5) is installed on the top of the lifting guide rail (4), and the piston rod of the cylinder (5) passes through the top cavity wall of the lifting guide rail (4) and is connected to the top of the sealing plate (6). The inner cavity of the machine body (1) is provided with a lifting heating cover (7). A resistance wire heating plate (8) is installed on the top of the inner cavity of the lifting heating cover (7). A second cylinder (9) is installed on the top surface of the protective cover (2). The piston rod of the second cylinder (9) penetrates the top cavity wall of the protective cover (2) and is connected to the top of the lifting heating cover (7).

2. The easy-to-operate reflow soldering apparatus for SMT production according to claim 1, characterized in that, The protective cover (2) has a through-hole, and a guide rod (10) is inserted into the guide hole. The bottom of the guide rod (10) is connected to the lifting heating cover (7).

3. The easy-to-operate reflow soldering apparatus for SMT production according to claim 2, characterized in that, A water filter box (11) is installed on the side wall of the machine body (1), and the inner cavity of the water filter box (11) is filled with filter liquid.

4. The easy-to-operate reflow soldering apparatus for SMT production according to claim 3, characterized in that, The protective cover (2) has an exhaust hood (12) on its side wall, and an exhaust pump (13) is provided in the inner cavity of the exhaust hood (12). The exhaust pumps (13) are distributed at equal intervals.

5. The easy-to-operate reflow soldering apparatus for SMT production according to claim 4, characterized in that, The exhaust hood (12) is connected to an air guide pipe (14), which is inserted into the bottom of the inner cavity of the water filter box (11).

6. The easy-to-operate reflow soldering apparatus for SMT production according to claim 5, characterized in that, The top of the water filter box (11) is connected to an exhaust pipe (15).

7. The easy-to-operate reflow soldering apparatus for SMT production according to claim 6, characterized in that, The protective cover (2) has an observation window embedded on its front.

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