Circuit integrated mainboard air knife detinning device

Abstract

The invention discloses an air knife detinning device for a circuit integrated mainboard, which is characterized in that a bearing seat rotatably provided with a rolling shaft is arranged on one side, far away from mainboard adding equipment, of a feeding groove, a plurality of first connecting frames are mounted on the circumferential outer wall of the rolling shaft at intervals, and a supporting seat matched with the feeding groove is rotatably mounted in each first connecting frame; a torsion elastic piece is arranged between the supporting seat and the first connecting frame; a third connecting frame is arranged on the inner wall of the supporting shell and is parallel to the first air knife ejector, the third connecting frame is fixedly connected with a contact plate matched with the supporting seat, a clamping plate is symmetrically arranged in the supporting seat, a bottom plate is arranged below the supporting seat, and the clamping plate and the bottom plate are fixedly connected through a limiting insertion rod; and a driving mechanism is arranged between the bottom plate and the supporting seat. On the basis of realizing rotary feeding of the main board, an air knife is parallel to the main board for tin removal, clamping and fixing of the main board are also realized, and the tin removal effect of the air knife is improved.

Description

Technical Field

[0001] This invention relates to the field of motherboard desoldering technology, and in particular to a hot air knife desoldering device for integrated circuit motherboards. Background Technology

[0002] With the advancement of technology, integrated circuit motherboards are constantly being updated and replaced, often requiring rework. During rework, it is necessary to clean the motherboard of removed components to ensure that no residual solder remains.

[0003] A Chinese invention patent with publication number CN211802782U discloses a wind-powered desoldering machine. The patent includes a material fixing mechanism for placing materials, a heating mechanism arranged above the material fixing mechanism, hot air desoldering mechanisms arranged at both ends of the material fixing mechanism, and a solder dross collection box. The heating mechanism is used to heat the materials on the material fixing mechanism so that the solder on the materials melts. The hot air desoldering mechanism is used to blow the melted solder dross to the solder dross collection box, which can automatically blow the solder dross on the materials into the solder dross collection box.

[0004] In existing technologies, when performing air-powered desoldering, the motherboard is transported via a transfer track or conveyor belt. However, the motherboard is not secured during transport, which allows it to easily move under the influence of wind. Furthermore, the change in the point of application of the air blades during this movement can easily damage the components on the motherboard, affecting its normal operation. Summary of the Invention

[0005] The purpose of this invention is to provide a circuit-integrated motherboard air knife desoldering device. This device, based on the rotating feeding of the motherboard, not only enables the air knife to desolder parallel to the motherboard, but also achieves clamping and fixing of the motherboard, greatly improving the stability of the motherboard, enhancing the desoldering effect of the air knife, and reducing damage to components on the motherboard by the air knife.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a circuit integrated motherboard air knife desoldering device, comprising: a supporting shell, a feeding trough disposed inside the supporting shell, one end of the feeding trough being connected to a motherboard adding device mounted on the supporting shell, a first air knife injector being mounted above the feeding trough, and an air compressor being mounted on the outer wall of the supporting shell, and a first air vent pipe being disposed between the air compressor and the first air knife injector; A bearing seat on which a roller is rotatably mounted is provided on the side of the feeding trough away from the motherboard adding device. Several first connecting frames are installed at intervals on the circumferential outer wall of the roller. A support seat that cooperates with the feeding trough is rotatably mounted inside the first connecting frame. A torsional elastic element is provided between the support seat and the first connecting frame. When the torsional elastic element is in its natural state, the support seat is perpendicular to the roller. A third connecting frame is provided on the inner wall of the supporting shell and parallel to the first air knife injector. The third connecting frame is fixedly connected to a contact plate that cooperates with the support. When the roller rotates, the contact plate can press one end of one of the supports, so that the support rotates and aligns with the air outlet of the first air knife injector. A clamping plate is symmetrically arranged inside the support. A bottom plate is provided below the support. The clamping plate and the bottom plate are fixedly connected by a limiting rod. A driving mechanism is provided between the bottom plate and the support, so that the bottom plate moves away from or closer to the support.

[0007] The following are further improvements to the above technical solution: 1. In the above scheme, a second air knife injector is provided on the other side of the roller and perpendicular to the first air knife injector. The second air knife injector is connected to the air compressor through a second vent pipe. An opening is opened on the side wall of the supporting shell corresponding to the air outlet of the second air knife injector. A waste collection chamber is provided on the outside of the supporting shell and on the opening.

[0008] 2. In the above scheme, a soft pad is attached to the inner wall of the waste collection bin.

[0009] 3. In the above scheme, the driving mechanism includes: an elastic element disposed between the base plate and the support, a second inclined abutment mounted on the base plate, and a pneumatic rod mounted on one side of the first connecting frame. The movable end of the pneumatic rod is fixedly connected to a first inclined abutment that cooperates with the second inclined abutment. When the pneumatic rod is in the extended state, the first inclined abutment pushes the second inclined abutment downward and causes the elastic element to be in the extended state.

[0010] 4. In the above scheme, a shaft is fixedly connected to each side of the support, and the shaft is rotatably connected to the first connecting frame.

[0011] 5. In the above scheme, the end of the support shaft away from the support base can pass through the first connecting frame and be fixedly connected to a limiting cover. The torsional elastic element is provided on the circumferential outer wall of the support shaft between the limiting cover and the outer wall of the first connecting frame.

[0012] 6. In the above scheme, a feeding box with an open opening is installed on the other side of the roller and on the bottom plate inside the support housing.

[0013] 7. In the above scheme, a rebound pad is provided above the feeding box and on the inner wall of the supporting shell.

[0014] 8. In the above scheme, a motor for driving the roller to rotate is provided on one side of the bearing housing.

[0015] 9. In the above scheme, the two ends of the first air knife injector are respectively sleeved on a guide rail slide by electric sliders, and the guide rail slide is fixedly installed on the inner top wall of the supporting shell.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The present invention provides a circuit-integrated motherboard air knife desoldering device. A bearing seat with a roller rotatably mounted is located on the side of the feeding trough away from the motherboard adding equipment. Inside the first connecting frame, a support seat cooperating with the feeding trough is rotatably mounted. A torsional elastic element is provided between the support seat and the first connecting frame. A third connecting frame is provided on the inner wall of the supporting housing, parallel to the first air knife injector, and a contact plate cooperating with the support seat is fixedly connected to the third connecting frame. Based on the motherboard rotation feeding mechanism, by providing a torsional elastic element between the support seat and the first connecting frame, and by providing the third connecting frame on the inner wall of the supporting housing, the contact plate presses one end of the support seat during the rotation of the roller, causing the support seat to rotate around the axis and align with the air outlet of the first air knife injector. The air knife is positioned parallel to the motherboard surface, allowing it to remove solder from the motherboard, thus improving the solder removal effect and reducing damage to components, thereby enhancing motherboard safety. Furthermore, the support base has a symmetrically arranged clamping plate, with a base plate below it. The clamping plate and base plate are fixedly connected by a limiting rod. A drive mechanism between the base plate and the support base allows the base plate to move away from or closer to the support base. The drive mechanism moves the clamping plate downwards, pressing the motherboard into the receiving groove. This significantly improves the stability of the motherboard's position during rotation, preventing damage to components and motherboard drop due to plate misalignment during air knife solder removal. This further enhances the solder removal effect.

[0017] 2. The present invention integrates a motherboard air knife desoldering device. A second air knife jet is located on the other side of the roller and is arranged perpendicular to the first air knife jet. This second air knife jet is connected to the air compressor through a second air pipe. An opening is opened on the side wall of the supporting shell corresponding to the air outlet of the second air knife jet. A waste collection chamber is fitted on the outside of the supporting shell and on the opening. After the motherboard surface is cleaned by blowing air in the X-axis direction by the first air knife jet, the motherboard is cleaned again by blowing air in the Y-axis direction during the rotation of the support. This facilitates the separation of residual solder dross from the motherboard. The solder dross will enter the waste collection chamber for centralized collection under the airflow, further improving the overall cleanliness. Attached Figure Description

[0018] Appendix Figure 1 This is a schematic diagram of the circuit-integrated motherboard air knife desoldering device of the present invention; Appendix Figure 2 This is a partial structural diagram of the air knife desoldering device on the integrated motherboard of the present invention. Figure 1 ; Appendix Figure 3 This is a partial structural diagram of the air knife desoldering device on the integrated motherboard of the present invention. Figure 2 ; Appendix Figure 4 This is a schematic diagram of the drive mechanism of the motherboard air knife desoldering device integrated into the circuit of the present invention; Appendix Figure 5 For the appendix Figure 4 Enlarged view of point A in the middle; Appendix Figure 6 This is a schematic diagram of the waste collection bin of the air knife desoldering device on the integrated circuit motherboard of the present invention.

[0019] In the attached diagrams: 1. Support shell; 201. Feed trough; 202. Limiting rod; 203. Second connecting frame; 204. Guide rail slide; 205. Electric slider; 206. Support base; 207. Limiting hole; 208. First inclined surface abutment; 209. Air spring; 210. Second inclined surface abutment; 211. Elastic element; 212. Base plate; 213. First connecting frame; 214. Side abutment plate; 215. Clamping plate; 401. Main board adding device; 402. Support shaft; 403. Limiting rod. 404. Feeding box; 405. Third connecting frame; 406. Contact plate; 407. Outer casing; 408. Torsional elastic element; 501. Second air knife injector; 502. Second vent pipe; 503. Rebound pad; 504. Through port; 505. Soft pad; 506. Waste collection bin; 5061. Arc-shaped guide part; 5062. Conical part; 6. Limiting cover; 7. Motor; 8. Roller; 9. Bearing seat; 10. First vent pipe; 11. First air knife injector; 12. Air compressor. Detailed Implementation

[0020] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0021] Example 1: A circuit integrated motherboard air knife desoldering device includes: a support shell 1, a feeding groove 201 is provided inside the support shell 1, one end of the feeding groove 201 is connected to a motherboard adding device 401 installed on the support shell 1, a first air knife injector 11 is installed above the feeding groove 201, and an air compressor 12 is installed on the outer wall of the support shell 1, and a first air pipe 10 is provided between the air compressor 12 and the first air knife injector 11; When in use, the device is added to the motherboard and slides into the feeding trough, where a support corresponding to the feeding trough is provided; A bearing seat 9 on the side of the feeding trough 201 away from the main board adding device 401 is provided, on which a roller 8 is rotatably mounted. A plurality of first connecting frames 213 are installed at intervals on the circumferential outer wall of the roller 8. A support 206 that cooperates with the feeding trough 201 is rotatably mounted inside the first connecting frame 213. A torsional elastic element 408 is provided between the support 206 and the first connecting frame 213. When the torsional elastic element 408 is in its natural state, the support 206 is perpendicular to the roller 8. A third connecting frame 405 is provided on the inner wall of the supporting housing 1 and parallel to the first air knife injector 11. The third connecting frame 405 is fixedly connected to a contact plate 406 that cooperates with the support 206. When the roller 8 rotates, the contact plate 406 can press one end of one of the supports 206 so that the support 206 rotates and aligns with the air outlet of the first air knife injector 11. A clamping plate 215 is symmetrically arranged inside the support 206. A base plate 212 is provided below the support 206. The clamping plate 215 and the base plate 212 are fixedly connected by a limiting rod 202. A driving mechanism is provided between the base plate 212 and the support 206 so that the base plate 212 moves away from or closer to the support 206.

[0022] A second air knife injector 501 is provided on the other side of the roller 8 and perpendicular to the first air knife injector 11. The second air knife injector 501 is connected to the air compressor 12 through a second vent pipe 502. A passage 504 is provided on the side wall of the support housing 1 corresponding to the air outlet of the second air knife injector 501. A waste collection chamber 506 is provided on the outside of the support housing 1 and on the passage 504. Then, the first air knife jet cleaner blows air onto the motherboard surface along the X-axis, and the second air knife jet cleaner blows air onto the motherboard along the Y-axis. This blows off the waste on the motherboard and creates an invisible, high-strength air wall below the waste's location to block and guide it into the waste collection bin for centralized storage.

[0023] A soft pad 505 is attached to the inner wall of the aforementioned waste collection bin 506; The waste entering the waste collection bin can have its rebound force reduced when it comes into contact with the inner wall of the bin by the soft padding, allowing the waste to fall smoothly and complete the recycling of the waste, thus improving the overall cleanliness.

[0024] A shaft 402 is fixedly connected to each side of the support 206, and the shaft 402 is rotatably connected to the first connecting frame 213.

[0025] The end of the aforementioned support shaft 402 away from the support base 206 can pass through the first connecting frame 213 and be fixedly connected to a limiting cover 6. The torsional elastic element 408 is provided on the circumferential outer wall of the support shaft 402 between the limiting cover 6 and the outer wall of the first connecting frame 213.

[0026] On the other side of the roller 8 and on the bottom plate inside the support housing 1, there is a feeding box 404 with an open opening.

[0027] A rebound pad 503 is provided above the above-mentioned feeding box 404 and on the inner wall of the supporting shell 1; Waste blown down in the X-axis direction can bounce back by contacting the rebound pad and fall back into the guide path of the second air knife injector.

[0028] A motor 7 for driving the roller 8 to rotate is provided on one side of the bearing housing 9.

[0029] The two ends of the first air knife injector 11 are respectively mounted on a guide rail slide 204 via electric sliders 205, and the guide rail slide 204 is fixedly installed on the inner top wall of the supporting housing 1.

[0030] The aforementioned supports 206 are spaced at equal intervals.

[0031] The aforementioned waste collection bin 506 includes: an arc-shaped guide portion 5061 and a conical portion 5062, with the arc-shaped guide portion 5061, which is connected to the opening 504, located above the conical portion 5062.

[0032] Example 2: A circuit integrated motherboard air knife desoldering device includes: a support shell 1, a feeding groove 201 is provided inside the support shell 1, one end of the feeding groove 201 is connected to a motherboard adding device 401 installed on the support shell 1, a first air knife injector 11 is installed above the feeding groove 201, and an air compressor 12 is installed on the outer wall of the support shell 1, and a first air pipe 10 is provided between the air compressor 12 and the first air knife injector 11; A bearing seat 9 on the side of the feeding trough 201 away from the main board adding device 401 is provided, on which a roller 8 is rotatably mounted. A plurality of first connecting frames 213 are installed at intervals on the circumferential outer wall of the roller 8. A support 206 that cooperates with the feeding trough 201 is rotatably mounted inside the first connecting frame 213. A torsional elastic element 408 is provided between the support 206 and the first connecting frame 213. When the torsional elastic element 408 is in its natural state, the support 206 is perpendicular to the roller 8. A third connecting frame 405 is provided on the inner wall of the supporting housing 1 and parallel to the first air knife injector 11. The third connecting frame 405 is fixedly connected to a contact plate 406 that cooperates with the support 206. When the roller 8 rotates, the contact plate 406 can press one end of one of the support 206 so that the support 206 rotates and aligns with the air outlet of the first air knife injector 11. A clamping plate 215 is symmetrically arranged inside the support 206. A bottom plate 212 is provided below the support 206. The clamping plate 215 and the bottom plate 212 are fixedly connected by a limiting rod 202. A driving mechanism is provided between the bottom plate 212 and the support 206 so that the bottom plate 212 moves away from or closer to the support 206. Then the roller drives multiple supports to rotate, and the first connecting frame also rotates until it moves to the top. By setting a torsion elastic element between the support and the first connecting frame, and setting a third connecting frame on the inner wall of the support shell, the contact plate can press one end of the support during the rotation of the roller, so that the support rotates around the axis and aligns with the air outlet of the first air knife injector. Under the tension of the torsion spring, the entire support is driven to fit into the first connecting frame.

[0033] The aforementioned driving mechanism includes: an elastic element 211 disposed between the base plate 212 and the support 206, a second inclined abutment block 210 mounted on the base plate 212, and a gas rod 209 mounted on one side of the first connecting frame 213. The movable end of the gas rod 209 is fixedly connected to a first inclined abutment block 208 that cooperates with the second inclined abutment block 210. When the gas rod 209 is in an extended state, the first inclined abutment block 208 pushes the second inclined abutment block 210 downward and causes the elastic element 211 to be in an extended state. The main board is located between the clamping plate and the support. The air spring drives the first inclined plate to move. Through tangential contact and compression with the second inclined plate, the base plate is pressed down, so that the clamping plate can stably clamp the main board, avoiding damage to components and the main board falling off due to plate displacement during the air knife desoldering process.

[0034] A shaft 402 is fixedly connected to each side of the support 206, and the shaft 402 is rotatably connected to the first connecting frame 213.

[0035] The end of the aforementioned support shaft 402 away from the support base 206 can pass through the first connecting frame 213 and be fixedly connected to a limiting cover 6. The torsional elastic element 408 is provided on the circumferential outer wall of the support shaft 402 between the limiting cover 6 and the outer wall of the first connecting frame 213.

[0036] On the other side of the roller 8 and on the bottom plate inside the support housing 1, there is a feeding box 404 with an open opening.

[0037] A limiting hole 207 is provided on each side of the aforementioned support 206, and the limiting rod 202 is slidably connected to the limiting hole 207.

[0038] The drive mechanism drives the clamping plate to move downwards, pressing the motherboard into the accommodating slot. This greatly improves the stability of the motherboard position during rotation, avoiding damage to components and the motherboard falling off due to plate displacement during air knife desoldering. This facilitates air knife desoldering of the motherboard and further improves the desoldering effect. The aforementioned clamping plate 215 is fixedly connected to a side abutment plate 214.

[0039] A second connecting frame 203 is provided between the aforementioned limiting rod 202 and the clamping plate 215, and the second connecting frame 203 is fixedly connected to the clamping plate 215 through a plurality of support rods 217.

[0040] There are two support rods 217, and the two support rods 217 are arranged symmetrically.

[0041] The aforementioned supports 206 are spaced at equal intervals.

[0042] An outer sleeve 407 is provided between the limiting cover 6 and the first connecting frame 213 and on the outside of the torsion elastic member 408.

[0043] A limiting seat 403 is provided on the bottom plate inside the supporting shell 1 and on one side of the feeding box 404.

[0044] The working principle of this invention is as follows: When in use, the device is added to the motherboard and slides into the feeding trough, where a support corresponding to the feeding trough is provided; Then, the roller drives multiple supports to rotate, and the first connecting frame also rotates until it moves to the top. By setting a torsion elastic element between the support and the first connecting frame, and setting a third connecting frame on the inner wall of the support shell, the contact plate can press one end of the support during the rotation of the roller, so that the support rotates around the axis and aligns with the air outlet of the first air knife injector. Under the tension of the torsion spring, the entire support is driven to fit into the first connecting frame. At this time, the main board is located between the clamping plate and the support. The air rod drives the first inclined plate to move. Through tangential contact and compression with the second inclined plate, the bottom plate is driven to press down, so that the clamping plate stably clamps the main board, avoiding the situation where the rotating plate shifts during the air knife desoldering process, causing damage to the parts and the main board to fall off. Then, the first air knife jet cleaner blows air onto the motherboard surface along the X-axis, and the second air knife jet cleaner blows air onto the motherboard along the Y-axis. This blows off the waste on the motherboard and builds an invisible high-strength air wall below the location where the waste falls to block and guide the waste into the waste collection bin for centralized storage. During the above process, the waste blown down in the X-axis direction can bounce back by contacting the rebound pad and fall back into the guide path of the second air knife injector. Then, the waste entering the waste collection bin can have the rebound force generated when the waste comes into contact with the inner wall of the waste collection bin reduced by the soft pad, so that the waste falls smoothly, completes the waste recycling, and improves the overall cleanliness.

[0045] When the above-mentioned circuit is used to integrate the motherboard air knife desoldering device, a torsional elastic element is set between the support and the first connecting frame, and a third connecting frame is set on the inner wall of the support housing. In this way, during the rotation of the roller, the contact plate presses one end of the support, so that the support rotates around the axis and aligns with the air outlet of the first air knife jet. This facilitates the air knife to desolder the motherboard from a direction parallel to the motherboard surface, improves the desoldering effect of the air knife, reduces the damage of the air knife to the components on the motherboard, and improves the safety of the motherboard. Furthermore, by driving the clamping plate downward through the drive mechanism, the motherboard is pressed into the inside of the receiving groove, which greatly improves the stability of the motherboard position during rotation and avoids the situation where the rotating plate shifts during the air knife desoldering process, causing damage to the parts and the motherboard to fall off. This is beneficial for the air knife to desolder the motherboard and further improves the desoldering effect. Furthermore, after the first air knife jet cleaner cleans the motherboard surface in the X-axis direction, it then cleans the motherboard again in the Y-axis direction during the rotation of the support. This helps to separate the residual solder dross from the motherboard, and the solder dross will enter the waste collection bin for centralized collection under the airflow, further improving the overall cleanliness.

[0046] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A circuit integration main board air knife desmear apparatus, comprising: The supporting shell (1) is characterized in that: a feeding trough (201) is provided inside the supporting shell (1), one end of the feeding trough (201) is connected to a main board adding device (401) installed on the supporting shell (1), a first air knife injector (11) is installed above the feeding trough (201), and an air compressor (12) is installed on the outer wall of the supporting shell (1), and a first air pipe (10) is provided between the air compressor (12) and the first air knife injector (11). A bearing seat (9) on the side of the feeding trough (201) away from the main board adding device (401) is provided with a roller (8) rotatably mounted. Several first connecting frames (213) are installed at intervals on the circumferential outer wall of the roller (8). A support (206) that cooperates with the feeding trough (201) is rotatably mounted inside the first connecting frame (213). A torsional elastic element (408) is provided between the support (206) and the first connecting frame (213). When the torsional elastic element (408) is in its natural state, the support (206) is perpendicular to the roller (8). A third connecting frame (405) is provided on the inner wall of the supporting shell (1) and parallel to the first air knife injector (11). The third connecting frame (405) is fixedly connected to a contact plate (406) that cooperates with the support (206). When the roller (8) rotates, the contact plate (406) can press one end of one of the supports (206) so that the support (206) rotates and aligns with the air outlet of the first air knife injector (11). A clamping plate (215) is symmetrically arranged inside the support (206). A base plate (212) is provided below the support (206). The clamping plate (215) and the base plate (212) are fixedly connected by a limiting rod (202). A driving mechanism is provided between the base plate (212) and the support (206) so that the base plate (212) moves away from or closer to the support (206).

2. The circuit integration main board air knife desmear apparatus according to claim 1, wherein: A second air knife injector (501) is provided on the other side of the roller (8) and perpendicular to the first air knife injector (11). The second air knife injector (501) is connected to the air compressor (12) through a second vent pipe (502). A passage (504) is opened on the side wall of the support shell (1) corresponding to the air outlet of the second air knife injector (501). A waste collection chamber (506) is fitted on the outside of the support shell (1) and on the passage (504).

3. The circuit integrated motherboard air knife desoldering device according to claim 2, characterized in that: A soft pad (505) is attached to the inner wall of the waste collection bin (506).

4. The circuit integrated motherboard air knife desoldering device according to claim 1 or 2, characterized in that: The driving mechanism includes: an elastic element (211) disposed between the base plate (212) and the support (206), a second inclined abutment (210) mounted on the base plate (212), and a gas rod (209) mounted on one side of the first connecting frame (213). The movable end of the gas rod (209) is fixedly connected to a first inclined abutment (208) that cooperates with the second inclined abutment (210). When the gas rod (209) is in the extended state, the first inclined abutment (208) pushes the second inclined abutment (210) downward and causes the elastic element (211) to be in the extended state.

5. The circuit integrated motherboard air knife desoldering device according to claim 1 or 2, characterized in that: A shaft (402) is fixedly connected to each side of the support (206), and the shaft (402) is rotatably connected to the first connecting frame (213).

6. The circuit integrated motherboard air knife desoldering device according to claim 5, characterized in that: The end of the support shaft (402) away from the support base (206) can pass through the first connecting frame (213) and be fixedly connected to a limiting cover (6). The torsional elastic element (408) is provided between the limiting cover (6) and the outer wall of the first connecting frame (213) and on the circumferential outer wall of the support shaft (402).

7. The circuit integrated motherboard air knife desoldering device according to claim 1, characterized in that: A feeding box (404) with an open opening is installed on the other side of the roller (8) and on the bottom plate inside the support housing (1).

8. The circuit integrated motherboard air knife desoldering device according to claim 7, characterized in that: A rebound pad (503) is provided above the feed box (404) and on the inner wall of the support shell (1).

9. The circuit integrated motherboard air knife desoldering device according to claim 1, characterized in that: A motor (7) for driving the roller (8) to rotate is provided on one side of the bearing housing (9).

10. The circuit integrated motherboard air knife desoldering device according to claim 1, characterized in that: The two ends of the first air knife injector (11) are respectively mounted on a guide rail slide (204) via electric sliders (205), and the guide rail slide (204) is fixedly installed on the inner top wall of the support shell (1).

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