A device for plugging holes with vacuum resin

Abstract

The utility model belongs to the technical field of printed circuit board processing, and specifically discloses a device for vacuum resin plugging holes, comprising: a steel mesh plate, on which plugging holes and positioning holes that need to be plugged with resin are provided by laser burning according to the design requirements of the printed circuit board; a mesh frame for supporting the steel mesh plate, and the steel mesh plate is detachably mounted on the mesh frame through a steel mesh card slot; a support frame for supporting the mesh frame, and the mesh frame is detachably mounted on the support frame through a fixed card slot and a pressure strip. The utility model cooperates with the steel mesh plate, the mesh frame and the support frame, and the steel mesh is laser punched and then inserted and removed, thereby replacing the lengthy processes of mechanical punching of aluminum sheets and drawing mesh plates, pasting aluminum sheets, and sealing mesh plates. The effect of changing the material number of vacuum resin plugging holes can be achieved by only replacing the steel mesh plate, thereby improving production efficiency. The steel mesh plate and the mesh frame are detachably arranged, and the steel mesh plate is thin and easy to store, and compared with the finished mesh plate, the storage space is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of printed circuit board processing, in particular to a device for plugging holes with vacuum resin. Background Art

[0002] With the rapid development of electronic information technology, higher requirements are put forward for printed circuit boards. A considerable part of the through-hole plugging ink originally used in the production of printed circuit boards has been replaced by resin plugging. The method of resin plugging has become one of the important methods to reduce the design size of PCB and match the equipment components. Its design concept and scalable production have played a great driving force in the field of PCB production, effectively improving the reliability and production process capabilities of products such as HDI, thick copper, and backplanes; on the one hand, the shrinkage of resin curing is much smaller than that of ink, and the possibility of producing voids is smaller, which can eliminate the poor conductivity problem caused by residual liquid in the hole; on the other hand, the miniaturization requirement of printed circuit boards has given rise to the requirement of patch on hole, and the use of resin plugging can solve the problem of hole in disk.

[0003] At present, most of the resin plugging holes adopt the vacuum resin plugging process. However, since the number of holes that need to be plugged with resin on each board ranges from 20,000 to 30,000, and even more than 100,000, the mechanical punching of aluminum sheets consumes a lot of equipment and man-hours. The aluminum sheets after punching have lengthy processes such as mesh drawing, aluminum sheet pasting, and mesh sealing. The finished mesh is relatively large in size, about 1100*1100mm*100mm, and storage takes up a lot of space. In view of this, we propose a device for vacuum resin plugging holes, which replaces aluminum sheets with steel mesh, is flexible to assemble and disassemble, and can achieve a volume of 660mm*580mm*0.13mm for easy storage. Utility Model Content

[0004] The purpose of the utility model is to provide a device for vacuum resin plugging holes, which replaces the aluminum sheet with a steel mesh, is flexible to install and disassemble, and can achieve a volume of 660mm*580mm*0.13mm for easy storage, so as to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for vacuum resin plugging holes, comprising: a steel mesh plate, on which plugging holes and positioning holes that need to be plugged with resin are laser-burned according to the design requirements of the printed circuit board;

[0006] A mesh frame used to support the steel mesh plate, wherein the steel mesh plate is detachably mounted on the mesh frame through a steel mesh card slot;

[0007] A support frame is used to support the screen frame, and the screen frame is detachably mounted on the support frame through fixed slots and pressure strips.

[0008] Preferably, the mesh frame is mainly composed of a mouth-shaped structure formed by four U-shaped frames and four connecting heads intersecting each other, the connecting heads are plugged into two adjacent U-shaped frames, and the inner wall of the U-shaped frame is provided with a steel mesh card slot for installing the steel mesh plate.

[0009] Preferably, plug blocks for plugging with the U-shaped frame are fixed on adjacent two sides of the connector, and a fixed slot is provided on one side of each of the U-shaped frames, and the plug blocks are located inside the fixed slot.

[0010] Preferably, the support frame includes a first support frame and a second support frame located inside the first support frame, and the surrounding surfaces of the second support frame are provided with clamping strips, and the clamping strips are matched with the fixed clamping slots.

[0011] Preferably, reinforcing strips are provided on the inner side walls around the second supporting frame, and both ends of the reinforcing strips are fixed to the second supporting frame by bolts.

[0012] Preferably, the first support frame includes two first support rods and two second support rods which are arranged in a rectangular hollow shape, the first support rod and the second support rod are arranged vertically, and both ends of the first support rod are connected to the two second support rods through connecting blocks.

[0013] Preferably, the pressure strip includes a first pressure plate and a second pressure plate, both ends of the first pressure plate and the second pressure plate are provided with notches, the notches on the first pressure plate and the notches on the second pressure plate are arranged correspondingly, and both ends of the first pressure plate and the second pressure plate are connected to the second support frame through lifting knobs.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model uses the coordination of steel mesh, mesh frame and support frame to insert and remove the steel mesh after laser punching, which replaces the lengthy process of mechanical punching of aluminum sheet and mesh drawing, aluminum sheet pasting, mesh sealing, etc. Only by replacing the steel mesh, the effect of vacuum resin plugging holes and changing material numbers can be achieved, thereby improving production efficiency.

[0016] 2. The utility model has a detachable steel mesh plate and a mesh frame, and the steel mesh plate is thin and light and easy to store, which saves storage space compared with the finished mesh plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the support frame of the utility model when a pressure strip is installed;

[0018] Figure 2 This is a schematic diagram of the structure of the support frame of the utility model when no pressure strips are installed;

[0019] Figure 3This is a schematic diagram of the structure of the steel mesh plate and mesh frame when they are installed;

[0020] Figure 4 This is a structural schematic diagram of the utility model when the steel mesh plate and the mesh frame are separated;

[0021] Figure 5 This is a schematic diagram of the layering structure of the utility model.

[0022] In the figure: 1. steel mesh plate; 2. mesh frame; 21. U-shaped frame; 22. connector; 23. steel mesh slot; 24. plug block; 25. fixed slot; 3. support frame; 31. first support frame; 311. first support rod; 312. second support rod; 313. connecting block; 32. second support frame; 33. reinforcing strip; 34. pressure strip; 341. first pressure sheet; 342. second pressure sheet; 343. notch; 344. lifting knob; 35. card strip; 4. positioning hole; 5. plug hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-3 The utility model provides a technical solution: a device for vacuum resin plugging holes, comprising: a steel mesh plate 1, on which are provided plugging holes 5 and positioning holes 4 that need to be plugged with resin, which are laser burned out according to the design requirements of the printed circuit board; a mesh frame 2 for supporting the steel mesh plate 1, and the steel mesh plate 1 is detachably mounted on the mesh frame 2 through a steel mesh card slot 23; a support frame 3 for supporting the mesh frame 2, and the mesh frame 2 is detachably mounted on the support frame 3 through a fixed card slot 25 and a pressure strip 34. Through the cooperation of the steel mesh plate 1, the mesh frame 2 and the support frame 3, the steel mesh is laser punched and then inserted and removed, which replaces the lengthy processes of mechanical punching of aluminum sheets and drawing mesh plates, pasting aluminum sheets, and sealing mesh plates. The effect of changing the material number of the vacuum resin plugging holes 5 can be achieved by only replacing the steel mesh plate 1, thereby improving production efficiency.

[0025] According to the design requirements of the printed circuit board, the diameter of the plug hole that needs to be plugged with resin is ≤0.25mm, which is 0.1mm larger than the bottom drilling diameter; the diameter of the plug hole>0.25mm is 0.05mm larger than the bottom drilling diameter; the positioning hole is designed to be 3.0mm and the same size as the positioning hole on the board. The laser equipment uses a fiber optic precision laser drilling machine with a wavelength of 1064nm. The processing parameters are shown in the table:

[0026]

[0027] The mesh frame 2 is mainly composed of a mouth-shaped structure formed by the intersection of four U-shaped frames 21 and four connecting heads 22. The connecting heads 22 are plugged into two adjacent U-shaped frames 21, and the inner wall of the U-shaped frame 21 is provided with a steel mesh card slot 23 for installing the steel mesh plate 1. The steel mesh plate 1 is installed on the inner side of the mesh frame 2 through the steel mesh card slot 23. The four corners of the steel mesh plate 1 are all provided with bevels, so that there is a gap between the steel mesh plate 1 and the mesh frame 2, which is convenient for replacing different steel mesh plates 1 according to the plugging requirements. The steel mesh plate 1 is light and easy to store, and saves storage space compared with the finished mesh plate.

[0028] The adjacent two sides of the connector 22 are fixed with plug blocks 24 for plugging with the U-shaped frame 21. A fixed slot 25 is provided on one side of each U-shaped frame 21. The plug block 24 is located inside the fixed slot 25, which is convenient for connecting multiple U-shaped frames 21 through the connector 22, thereby improving the convenience of preparing the U-shaped frame 21. The connectors 22 are all made of PP material, with a thickness of 0.7mm and a size of 2mm*2mm in a square shape, plus semicircular plug blocks 24 with a length of 1mm and a thickness of 0.6mm on the adjacent two sides.

[0029] The support frame 3 includes a first support frame 31 and a second support frame 32 located inside the first support frame 31. The second support frame 32 is provided with clamping strips 35 on all four sides. The clamping strips 35 are matched with the fixed clamping slots 25. The clamping strips 35 and the fixed clamping slots 25 are engaged with each other to facilitate the connection between the screen frame 2 and the support frame 3. The first support frame 31 is a hollow rectangle with a thickness of 50 mm, and the inner and outer dimensions are 710 mm*630 mm and 750 mm*670 mm, respectively. The main function is to fix the resin plugging device on the vacuum resin plugging machine 5 to realize the resin plugging function. The second support frame 32 is a hollow rectangle with a thickness of 40 mm, and the inner and outer dimensions are 640 mm*560 mm and 710 mm*630 mm, respectively.

[0030] The inner side walls of the second support frame 32 are provided with reinforcing strips 33, and the two ends of the reinforcing strips 33 are fixed to the second support frame 32 by bolts. The reinforcing strips 33 are used to reinforce the steel mesh plate 1, and the inner side is fixed to the second support frame 32 by eight bolts. The steel mesh plate 1 has a size of 660mm*580mm, and the outer size of the mesh frame 2 is 680mm*600mm. The steel mesh card slot 23 has a gap width of 0.13mm and a depth of 5mm. The fixed card slot 25 has a gap width of 0.7mm and a depth of 0.6mm. The card strip 35 is set as a semicircular card strip.

[0031] The first support frame 31 includes two first support rods 311 and two second support rods 312 that are arranged in a rectangular hollow shape. The first support rods 311 and the second support rods 312 are arranged vertically, and both ends of the first support rod 311 are connected to the two second support rods 312 through a connecting block 313, and the connecting block 313 is made of PP material.

[0032] The pressure strip 34 includes a first pressing plate 341 and a second pressing plate 342, both ends of which are provided with notches 343, the notches 343 on the first pressing plate 341 and the notches 343 on the second pressing plate 342 are arranged correspondingly, both ends of the first pressing plate 341 and both ends of the second pressing plate 342 are connected to the second supporting frame 32 through a lifting knob 344, and the notches 343 can be used to make the first pressing plate 341 and the second pressing plate 342 form a mouth-shaped structure with a flat surface, and the distance between the first pressing plate 341 and the second pressing plate 342 and the second supporting frame 32 can be adjusted by the lifting knob 344, so that the screen frame 2 can be fixed by the clamping force between the first pressing plate 341 and the second pressing plate 342 and the second supporting frame 32.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for vacuum resin plugging, characterized in that: include: A steel mesh plate (1), wherein the steel mesh plate (1) is provided with plug holes (5) and positioning holes (4) that are laser-burned according to the design requirements of the printed circuit board and need to be plugged with resin; A mesh frame (2) used for supporting a steel mesh plate (1), wherein the steel mesh plate (1) is detachably mounted on the mesh frame (2) via a steel mesh card slot (23); A support frame (3) is used to support a screen frame (2); the screen frame (2) is detachably mounted on the support frame (3) via a fixed card slot (25) and a pressure strip (34).

2. The device for vacuum resin plugging of holes according to claim 1, characterized in that: The mesh frame (2) is a mouth-shaped structure formed by four U-shaped frames (21) and four connectors (22) intersecting each other. The connectors (22) are plugged into two adjacent U-shaped frames (21), and the inner wall of the U-shaped frame (21) is provided with a steel mesh card slot (23) for installing the steel mesh plate (1).

3. The device for vacuum resin plugging of holes according to claim 2, characterized in that: An insert block (24) for plugging into the U-shaped frame (21) is fixed on both adjacent sides of the connector (22), and a fixed slot (25) is provided on one side of each U-shaped frame (21), wherein the insert block (24) is located inside the fixed slot (25).

4. The device for vacuum resin plugging of holes according to claim 3, characterized in that: The support frame (3) comprises a first support frame (31) and a second support frame (32) located inside the first support frame (31); the second support frame (32) is provided with clamping strips (35) on all four sides of the surface; the clamping strips (35) are matched with the fixed clamping slots (25).

5. The device for vacuum resin plugging of holes according to claim 4, characterized in that: Reinforcement strips (33) are provided on the inner side walls around the second support frame (32), and both ends of the reinforcement strips (33) are fixed to the second support frame (32) by bolts.

6. The device for vacuum resin plugging of holes according to claim 5, characterized in that: The first support frame (31) comprises two first support rods (311) and two second support rods (312) which are arranged in a rectangular hollow shape; the first support rod (311) and the second support rod (312) are arranged vertically, and both ends of the first support rod (311) are connected to the two second support rods (312) via a connecting block (313).

7. The device for vacuum resin plugging of holes according to claim 6, characterized in that: The pressure strip (34) comprises a first pressure plate (341) and a second pressure plate (342); both ends of the first pressure plate (341) and the second pressure plate (342) are provided with notches (343); the notches (343) on the first pressure plate (341) and the notches (343) on the second pressure plate (342) are arranged correspondingly; both ends of the first pressure plate (341) and both ends of the second pressure plate (342) are connected to the second support frame (32) via lifting knobs (344).

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