Blowing device for PCB packaging

Abstract

The utility model discloses an air blowing device used for PCB packaging, comprising a substrate, an air blowing pipe, an air pipe fixing base and an air blowing support block, the air pipe fixing base is detachably connected below the substrate, the installation position of the substrate can be horizontally adjusted relative to the air pipe fixing base, the tail part of the air blowing pipe is connected on the air pipe fixing base, and the air blowing support block is arranged on the air blowing pipe. The front end of the blowing pipe is connected with a blowing supporting block; the air pipe fixing base comprises a base, an air pipe fixing block and a ventilation block, the air pipe fixing block is connected to the base, a through groove is formed in the middle of the air pipe fixing block, the ventilation block is embedded into the through groove and connected with the air pipe fixing block, a through air cavity is formed in the ventilation block, and the tail end of the air blowing pipe is inserted into the front end of the through air cavity. A first circular groove is formed in the inner wall of the through air cavity, an air inlet sealing ring is embedded in the first circular groove, and the tail end of the air blowing pipe is connected into the through air cavity in a sealed mode through the air inlet sealing ring. According to the device, the problem that the sealing ring falls off can be solved, and the position of the blowing device can be adjusted in the horizontal direction.

Description

Technical Field

[0001] The utility model belongs to the technical field of PCB packaging and testing, and particularly relates to an air blowing device used for PCB packaging. Background Art

[0002] PCB packaging, also known as chip packaging, refers to the process of connecting and protecting microelectronic components (such as chips, transistors, integrated circuits, etc.) or other electronic components (such as resistors, capacitors, and inductors) with wires. Encapsulating them in a small plastic package has become a new type of electronic component manufacturing process. PCB packaging is a crucial step in the electronics manufacturing process. Chips must be encapsulated before they can be mounted and soldered using surface mount (SMT) equipment. Air blowing is performed during the PCB packaging process. The core purpose of air blowing is to prevent holes from being blown during soldering. Air blowing helps to remove air trapped in the holes and prevent defects caused by gas expansion during welding. Existing air blowing systems often experience sealing ring detachment, hindering testing progress. If personnel fail to detect such issues in time, uneven heating of the PCB can lead to abnormal test data. The sealing ring can also easily become lodged in the test equipment, potentially damaging the equipment. Furthermore, existing air blowing systems are fixed in position. Fine adjustments to the test position require replacing the substrate, which is time-consuming and labor-intensive, reducing testing efficiency. Utility Model Content

[0003] In response to the above problems and technical requirements, the utility model provides an air blowing device for PCB packaging, which can solve the problem of sealing ring falling off and avoid damage to the equipment. It can also realize the horizontal position adjustment of the air blowing device, with high testing efficiency and safer testing process.

[0004] The technical solution of the utility model is as follows: A blowing device for PCB packaging, comprising a substrate, an air blowing pipe, an air pipe fixing base and an air blowing support block, the air pipe fixing base is detachably connected to the bottom of the substrate, the substrate can adjust the installation position horizontally relative to the air pipe fixing base, the tail end of the air blowing pipe is connected to the air pipe fixing base, and the front end of the air blowing pipe is connected to the air blowing support block; the air pipe fixing base comprises a base, an air pipe fixing block and a ventilation block, the air pipe fixing block is connected to the base, a through groove is provided in the middle of the air pipe fixing block, the ventilation block is embedded in the through groove and connected to the air pipe fixing block, a through air cavity is provided in the ventilation block, the tail end of the air blowing pipe is inserted into the front end of the through air cavity, a first circular groove is provided on the inner wall of the through air cavity, an air intake sealing ring is embedded and installed in the first circular groove, and the tail end of the air blowing pipe is sealed and connected to the through air cavity through the air intake sealing ring. In this solution, the air intake sealing ring is embedded in the inner wall of the through air cavity. The air intake sealing ring is not easy to fall out under long-term working conditions, and can effectively seal for a long time, avoiding the situation where the sealing ring is blown out and damages the test equipment, thereby improving the test stability.

[0005] Furthermore, the through-slot of the trachea fixing block has symmetrically defined limiting cavities on both sides, and limiting blocks are provided on both sides of the ventilation block. The ventilation block is embedded in the through-slot, and the limiting blocks on both sides are correspondingly embedded in the limiting cavities to position the ventilation block. The ventilation block and the trachea fixing block adopt a split design, and the two are interlockingly connected. When the ventilation block ages due to long-term heat exposure, only the ventilation block needs to be replaced, which not only makes replacement more convenient, but also saves maintenance costs and improves economic efficiency.

[0006] Furthermore, a gasket and a fastening screw are installed on the rear side of the tracheal fixing block. The gasket is installed between the tracheal fixing block and the ventilation block. The edge of the gasket blocks the rear end surface of the ventilation block from the rear, limiting the position of the ventilation block. The fastening screw locks the gasket to the tracheal fixing block. The gasket and fastening screw limit the position of the ventilation block, ensuring that the ventilation block is stably embedded in the through groove. When the ventilation block needs to be replaced, the gasket and fastening screw can be removed to remove the ventilation block.

[0007] Furthermore, a conical surface is provided on the outer periphery of the tail end of the air blowing pipe, the tail end of the air blowing pipe is inserted into the through air cavity, the outer side of the air intake sealing ring in the through air cavity is embedded in the first circular groove, and the inner side of the air intake sealing ring is tightly hugged to the outer side of the conical surface.

[0008] Furthermore, the ventilation block is provided with two parallel through-holes, each connected to a blowpipe. The two blowpipes are symmetrically arranged, with their midsections extending obliquely outward. To ensure a stable and uniform air source and pressure for the two blowpipes, a blind hole can be provided in the ventilation block, connecting to both through-holes. Air can be ventilated into the ventilation block through the blind hole, ensuring that the air pressure delivered by the two blowpipes is consistent.

[0009] Furthermore, a blowing cavity is provided in the middle of the blowing support block, a second circular groove is provided on the inner wall of the blowing cavity, a blowing sealing ring is embedded in the second circular groove, the front end of the blowing pipe is inserted into the blowing cavity, and the front end of the blowing pipe is sealed and connected to the blowing cavity through the blowing sealing ring.

[0010] Furthermore, the blowing support block is provided with two fixing holes symmetrically arranged on both sides of the blowing cavity. The fixing holes are used to fix the front end of the blowing pipe to the place where the blowing operation is to be performed, making the blowing more stable.

[0011] Furthermore, screw holes are symmetrically provided on both sides of the top surface of the trachea fixing block, and two long holes corresponding to the screw holes are provided in the middle of the base plate. The long holes and the screw holes are fixedly connected by bolts, and the connection position between the long holes and the screw holes can be adjusted horizontally.

[0012] Furthermore, the base plate and air pipe fixing block are both made of aluminum alloy with an anti-static coating, while the ventilation block is made of anti-static plastic. A split-type interlocking connection structure is used, with the air pipe fixing block providing sufficient support strength and the ventilation block being easy to partially replace after aging, reducing subsequent maintenance costs.

[0013] Beneficial effects of the utility model:

[0014] 1) This device has circular grooves in the through-air cavity of the ventilation block and in the blowing cavity of the blowing support block. The front and rear circular grooves are respectively inlaid with a blowing sealing ring and an air inlet sealing ring. The sealing rings are located inside to ensure long-term effective sealing of the air inlet and outlet ends and prevent the sealing rings from loosening. Compared with traditional glue-bonded sealing rings, the sealing rings in this device have a more stable fit, which can avoid damage to the equipment and reduce the workload of personnel to a certain extent.

[0015] 2) In this device, the air pipe fixing block and the ventilation block are split structures. The air pipe fixing block is made of aluminum alloy with anti-static coating, which improves the strength and high-temperature resistance of the device. The ventilation block, which is directly connected to the PCB, is made of a special plastic material with more stable anti-static properties. This is because traditional integral plastic materials are prone to aging when working in a high-temperature environment for a long time. By setting only the ventilation block to plastic material, only the ventilation block needs to be replaced after aging, which greatly reduces the subsequent maintenance costs.

[0016] 3) Two long holes corresponding to the screw holes are provided in the middle of the base plate. The long holes have a certain adjustment stroke. Therefore, by changing the connection position of the long holes and the screw holes, the function of adjusting the position of the base plate in the horizontal direction can be realized, so that the platform can adapt to PCB boards in different heating positions and improve the adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an overall structural diagram of an air blowing device for PCB packaging in the utility model;

[0018] Figure 2 This is an exploded structural diagram of an air blowing device for PCB packaging according to the present invention;

[0019] Marked in the figure are: base plate 1, long hole 11, bolt 12, air blowing pipe 2, conical surface 21, air pipe fixing base 3, base 4, air pipe fixing block 5, through groove 51, limiting cavity 511, screw hole 52, ventilation block 6, limiting block 61, through air cavity 62, gasket 621, fastening screw 622, first circular groove 63, air inlet sealing ring 64, air blowing support block 7, air blowing cavity 71, air blowing sealing ring 72, fixing hole 73. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] like Figure 1-2 The figure shows an air blowing device for PCB packaging of the present invention, comprising a substrate 1, an air blowing pipe 2, an air pipe fixing base 3 and an air blowing support block 7. The air pipe fixing base 3 is detachably connected to the bottom of the substrate 1, and the substrate 1 can be horizontally adjusted relative to the air pipe fixing base 3. The tail end of the air blowing pipe 2 is connected to the air pipe fixing base 3, and the front end of the air blowing pipe 2 is connected to the air blowing support block 7.

[0022] The trachea fixing base 3 includes a base 4, a trachea fixing block 5, and a vent block 6. The trachea fixing block 5 is connected to the base 4. A through groove 51 is provided in the middle of the trachea fixing block 5. The vent block 6 is embedded in the through groove 51 and connected to the trachea fixing block 5. A through air cavity 62 is provided in the vent block 6. The tail end of the blowing pipe 2 is inserted into the front end of the through air cavity 62. A first circular groove 63 is provided on the inner wall of the through air cavity 62. An air intake sealing ring 64 is embedded in the first circular groove 63. The tail end of the blowing pipe 2 is sealed in the through air cavity 62 via the air intake sealing ring 64. Limiting cavities 511 are symmetrically provided on both sides of the through groove of the trachea fixing block 5. Limiting blocks 61 are provided on both sides of the vent block 6. The vent block 6 is embedded in the through groove 51. The limiting blocks 61 on both sides are correspondingly embedded in the limiting cavities 511 to position the vent block 6. A gasket 621 and a fastening screw 622 are installed on the rear side of the trachea fixing block 5. The installation position of the gasket 621 is located between the trachea fixing block 5 and the ventilation block 6. The edge of the gasket 621 blocks the rear end face of the ventilation block 6 from the rear to limit the ventilation block 6. The fastening screw 622 locks the gasket 621 to the trachea fixing block 5.

[0023] The base plate 1 and the air pipe fixing block 5 are both made of aluminum alloy with an antistatic coating, while the ventilation block 6 is made of antistatic plastic. They adopt a split-type interlocking connection structure, where the air pipe fixing block provides sufficient support strength, and the ventilation block can be easily replaced after aging, reducing subsequent maintenance costs.

[0024] The top surface of the air pipe fixing block 5 is symmetrically provided with screw holes 52 on both sides. Two elongated holes 11 corresponding to the screw holes 52 are provided in the middle of the base plate 1. The elongated holes 11 and the screw holes 52 are fixedly connected by bolts 12. The connection position between the elongated holes 11 and the screw holes 52 can be adjusted horizontally. The two elongated holes 11 corresponding to the screw holes 52 are provided in the middle of the base plate 1. The elongated holes 11 have a certain adjustment range. Therefore, by changing the connection position of the elongated holes 11 and the screw holes 52, the base plate 1 can be adjusted in the horizontal direction. This allows the platform to adapt to PCB boards with different heating positions, improving the adaptability of the device.

[0025] The tail end of the air blowing tube 2 is provided with a tapered surface on its outer periphery. The tail end of the air blowing tube 2 is inserted into a through-hole 62. The outer side of the air inlet sealing ring 64 in the through-hole 62 is embedded in the first circular groove 63, and the inner side of the air inlet sealing ring 64 is tightly attached to the outer side of the tapered surface 21. The ventilation block 6 is provided with two parallel through-hole cavities 62, each connected to a respective air blowing tube 2. The two air blowing tubes 2 are symmetrically arranged, with the middle sections of the air blowing tubes 2 extending outward at an angle.

[0026] The blowing support block 7 has a central portion with a blowing cavity 71. A second circular groove (not shown) is defined on the inner wall of the blowing cavity 71, within which a blowing seal ring 72 is embedded. The front end of the blowing tube 2 is inserted into the blowing cavity 71, where it is sealed to the cavity 71 via the blowing seal ring 72. The blowing support block 7 also has two fixing holes 73, symmetrically located on either side of the blowing cavity 71. These fixing holes 73 are used to secure the front end of the blowing tube to the location where the blowing operation is to be performed, ensuring more stable blowing.

[0027] The blowing installation and debugging process of this device is as follows: insert the air inlet sealing ring 64 into the through air cavity 62 of the ventilation block 6, insert the blowing sealing ring 72 into the blowing cavity 71 of the blowing support block 7, insert the front and rear ends of the two blowing pipes 2 into the blowing support block 7 and the through air cavity 62 respectively, and connect the ventilation block 6, the blowing pipe 2 and the blowing support block 7 together; insert the ventilation block 6 into the through groove 51 of the trachea fixing block 5, and insert the limit blocks 61 on both sides of the ventilation block 6 into the limit cavities 511 on both sides of the through groove 51 In the figure, the gasket 621 is pressed between the air pipe fixing block 5 and the ventilation block 6 from the rear, and the gasket 621 is fixed to the rear side of the air pipe fixing block 5 by tightening the screws 622 to limit the ventilation block 6; the base plate 1 is fixedly installed on the test machine, the air pipe fixing block 5 is connected to the bottom of the base plate 1, and the fixed installation position is adjusted by the long hole 11 and the screw hole 52, and the rear end of the air blow pipe 2 is connected to the heating device. After the installation is completed, the test machine blows air, which is blown in by the ventilation block 6 and blown forward through the air blow pipe 2 to make the PCB heated evenly.

[0028] The above descriptions are merely some preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes and substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An air blowing device for PCB packaging, characterized in that: The air pipe fixing base is connected to the air pipe fixing base by the air pipe fixing base, and the front end of the air pipe is connected to the air pipe fixing base. The air pipe fixing base includes a base, an air pipe fixing block and a ventilation block. The air pipe fixing block is connected to the base. A through groove is provided in the middle of the air pipe fixing block. The ventilation block is embedded in the through groove and connected to the air pipe fixing block. A through air cavity is provided in the ventilation block. The tail end of the air pipe is inserted into the front end of the through air cavity. A first circular groove is provided on the inner wall of the through air cavity. An air intake sealing ring is embedded in the first circular groove. The tail end of the air pipe is sealed and connected to the through air cavity through the air intake sealing ring.

2. The air blowing device for PCB packaging according to claim 1, characterized in that: The limiting cavities are symmetrically provided on both side walls of the through slot of the trachea fixing block, and limiting blocks are provided on both sides of the ventilation block. The ventilation block is embedded in the through slot, and the limiting blocks on both sides are correspondingly embedded in the limiting cavities to position the ventilation block.

3. The air blowing device for PCB packaging according to claim 2, characterized in that: A gasket and a fastening screw are installed on the rear side of the trachea fixing block. The installation position of the gasket is between the trachea fixing block and the ventilation block. The edge of the gasket blocks the rear end face of the ventilation block from the rear to limit the ventilation block. The fastening screw locks the gasket and the trachea fixing block.

4. The air blowing device for PCB packaging according to claim 3, characterized in that: The tail end of the air blowing pipe is provided with a tapered surface on its outer periphery. The tail end of the air blowing pipe is inserted into the through air cavity. The outer side of the air intake sealing ring in the through air cavity is embedded in the first circular groove. The inner side of the air intake sealing ring is tightly hugged to the outer side of the tapered surface.

5. The air blowing device for PCB packaging according to claim 4, characterized in that: The ventilation block is provided with two parallel through-going air cavities, each of which is connected to an air blowing pipe. The two air blowing pipes are symmetrically arranged, and the middle sections of the air blowing pipes extend obliquely outwards.

6. The air blowing device for PCB packaging according to claim 5, characterized in that: A blowing cavity is provided in the middle of the blowing support block, a second circular groove is provided on the inner wall of the blowing cavity, a blowing sealing ring is embedded in the second circular groove, the front end of the blowing pipe is inserted into the blowing cavity, and the front end of the blowing pipe is sealed and connected to the blowing cavity through the blowing sealing ring.

7. The air blowing device for PCB packaging according to claim 6, characterized in that: The blowing support block is further provided with two fixing holes, which are symmetrically arranged on both sides of the blowing cavity.

8. The air blowing device for PCB packaging according to claim 7, characterized in that: Screw holes are symmetrically provided on both sides of the top surface of the trachea fixing block, and two long holes corresponding to the screw holes are provided in the middle of the base plate. The long holes and the screw holes are fixedly connected by bolts, and the connection position between the long holes and the screw holes can be adjusted horizontally.

9. The air blowing device for PCB packaging according to claim 8, characterized in that: The base plate and the air pipe fixing block are both made of aluminum alloy with an anti-static coating on the surface, and the ventilation block is made of anti-static plastic.

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