Circuit board hole plugging jig
By designing circuit board plug fixtures, using the stacking setting and the design of gradually smaller flow holes, the problems of oil leakage and plug holes in the circuit board plug hole process are solved, and the quality and efficiency of plug holes are improved.
Patent Information
- Application Number
- CN202422035118.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-08-21
AI Technical Summary
When the through-hole diameter of the existing circuit board plug-in technology is large, it is easy to cause problems such as oil leakage and plug-in holes. The secondary plug-in method is complicated and the cost of consumables and time costs are high.
A circuit board plug-in fixture was designed. By stacking and setting mesh plates, deflectors, circuit boards, breathable cushion plates and bottom plates, the gradual reduction design of the deflectors increases the glue injection pressure of the ink, and combined with the breathable hole structure of the breathable cushion plate, ensure that the ink fully fills the through holes.
By increasing the ink injection pressure, the problems of insufficient or uneven plug holes are avoided, the quality of plug holes on the circuit board is improved, and the process complexity and consumable cost are reduced.
Smart Images
Figure CN222814657U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of circuit board processing, in particular to a circuit board plugging fixture. Background Art
[0002] PCB (Printed Circuit Board) is a carrier for connecting electronic components with electrical signals. It is assembled into modules or products with specific functions by connecting components and other electronic circuit parts. PCB plays an extremely important role in the entire electronic product. For multi-layer boards, through holes can be used to connect signals of different layers. In order to strictly control the current leakage of the circuit board and improve higher stability, it is necessary to use an ink plugging process to fill the through holes with ink to form a flat surface. In the case of a large aperture of the through hole, plugging is prone to problems such as oil leakage and plugging voids. Generally, the secondary plugging method is used, but the process is cumbersome and the cost of consumables and time are high. Utility Model Content
[0003] The utility model aims to overcome the shortcomings and deficiencies of the prior art and provide a circuit board plugging fixture.
[0004] A circuit board plugging fixture comprises a mesh plate, a guide plate, a circuit board, a breathable pad and a base plate which are stacked in sequence, wherein the base plate is arranged on a plugging processing platform, the base plate has a mounting surface, the mounting surface is provided with a positioning column, the guide plate is provided with a positioning groove, the guide plate is installed on the base plate through the positioning groove, the circuit board is pressed onto the mounting surface through the guide plate, the breathable pad is arranged between the circuit board and the mounting surface, the guide plate is provided with a guide hole, the circuit board is provided with a through hole, the breathable pad is provided with an air hole, the guide hole, the through hole and the air hole are arranged correspondingly, the diameter of the guide hole is smaller than that of the through hole, and the diameter of the guide hole gradually decreases from away from the circuit board to close to the circuit board.
[0005] In one embodiment, the diameter of the air-permeable hole is smaller than that of the through hole.
[0006] In one embodiment, the diameter of the vent hole gradually increases from the direction close to the circuit board to the direction far away from the circuit board.
[0007] In one embodiment, the pore size of the air-permeable hole is 30-100 μm larger than the pore size of the through hole.
[0008] In one embodiment, a plurality of injection hole groups are provided on the mesh plate, one of the injection hole groups includes a plurality of mesh pores, and one of the injection hole groups is arranged corresponding to one of the guide holes.
[0009] In one embodiment, the thickness of the breathable backing plate is less than the thickness of the circuit board.
[0010] In one embodiment, the breathable pad includes a plurality of combined small plates, and a combined component is disposed on the side of the combined small plates. The combined small plates are connected to each other through the combined component to form the breathable pad.
[0011] In one embodiment, the air-permeable backing plate is an epoxy resin plate or a phenolic resin plate.
[0012] In one embodiment, the breathable pad has a mesh structure.
[0013] In one embodiment, the mounting surface is provided with positioning feet for positioning the circuit board.
[0014] The beneficial effects of the utility model are:
[0015] The mesh plate, guide plate, circuit board, breathable pad and bottom plate are stacked in sequence to form a circuit board plugging fixture. A positioning column is set on the mounting surface of the bottom plate, and the guide plate is provided with a positioning groove matching it. The positioning column is inserted into the positioning groove, so as to achieve the corresponding coordination of the guide plate and the bottom plate. The resin ink flows into the through hole (hole to be plugged) of the circuit board through the mesh of the mesh plate and the guide hole of the guide plate, and the hole is filled. It can be ventilated through the breathable holes opened in the breathable pad, wherein the aperture of the guide hole gradually decreases from away from the circuit board to close to the circuit board, that is, the channel of the guide becomes narrower, thereby increasing the injection pressure of the ink, which is conducive to the ink fully filling the through hole, avoiding the problem of insufficient or uneven plugging, and improving the quality of the circuit board plugging. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0017] Figure 1 The figure is a schematic structural diagram of a circuit board via plugging fixture according to one embodiment.
[0018] Figure 2 Schematic diagram of the structure of a breathable pad according to an embodiment. DETAILED DESCRIPTION
[0019] 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 of 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.
[0020] like Figure 1 As shown, it is a circuit board plugging fixture of a preferred embodiment of the utility model, specifically, it includes a mesh plate 1, a guide plate 2, a circuit board 3, a breathable pad 4 and a base plate 5 which are stacked in sequence, the base plate 5 is arranged on the plugging processing platform, the base plate 5 has a mounting surface 6, the mounting surface 6 is provided with a positioning column, the guide plate 2 is provided with a positioning groove, the guide plate 2 is installed on the base plate 5 through the positioning groove, the circuit board 3 is pressed on the mounting surface 6 through the guide plate 2, the breathable pad 4 is arranged between the circuit board 3 and the mounting surface 6, the guide plate 2 is provided with a guide hole 7, the circuit board 3 is provided with a through hole 8, the breathable pad 4 is provided with an air hole 9, the guide hole 7, the through hole 8 and the air hole 9 are correspondingly arranged, the aperture of the guide hole 7 is smaller than the through hole 8, and the aperture of the guide hole 7 gradually decreases from away from the circuit board 3 to close to the circuit board 3.
[0021] In this embodiment, the mesh plate 1, the guide plate 2, the circuit board 3, the breathable pad 4 and the bottom plate 5 are stacked in sequence to form a plugging fixture for the circuit board 3. The mounting surface 6 of the bottom plate 5 is provided with a positioning column, and the guide plate 2 is provided with a positioning groove matching it, and the positioning column is penetrated in the positioning groove, so as to achieve the corresponding coordination of the guide plate 2 and the bottom plate 5. The resin ink flows into the through hole 8 (hole to be plugged) of the circuit board 3 through the mesh of the mesh plate 1 and the guide hole 7 of the guide plate 2, and the hole is filled. It can be ventilated through the breathable hole 9 provided in the breathable pad 4, wherein the aperture of the guide hole 7 gradually decreases from away from the circuit board 3 to close to the circuit board 3, that is, the channel of the guide becomes narrower, thereby increasing the injection pressure of the ink, which is conducive to the ink fully filling the through hole 8, avoiding the problem of insufficient or uneven plugging, and improving the plugging quality of the circuit board 3.
[0022] The other side of the ink injection is covered with a breathable pad 4. In one embodiment, the aperture of the breathable hole 9 is smaller than the through hole 8. Furthermore, the aperture of the breathable hole 9 gradually increases from the direction close to the circuit board 3 to the direction away from the circuit board 3. It should be understood that the diameter of the breathable hole 9 at the maximum aperture is still smaller than the aperture of the breathable hole 9. The breathable pad 4 of this embodiment combines the functions of the high-temperature release film and the breathable pad. It has a supporting function and can avoid quality problems such as bubbles in the plugging hole and bulges or depressions of the resin on the plugging hole surface. After the board is removed, the excess ink glue on the surface can be easily removed to ensure the quality of the plugging hole.
[0023] In one embodiment, the pore size of the air-permeable hole 9 is larger than the pore size of the through hole 8 by 30-100 μm.
[0024] In one embodiment, the stencil 1 is provided with a plurality of injection hole groups, one of the injection hole groups includes a plurality of mesh pores, and one of the injection hole groups is provided corresponding to one of the guide holes 7. The plugging machine injects ink into the guide holes 7 through the mesh pores on the stencil 1, and the mesh pores can effectively pressurize and cut bubbles formed in the ink, thereby avoiding the problems of plugging bubbles, insufficient or uneven plugging, and improving the plugging quality of the circuit board 3.
[0025] In one embodiment, the thickness of the breathable backing plate 4 is smaller than the thickness of the circuit board 3 .
[0026] In one embodiment, the breathable pad 4 includes a plurality of combined small plates 12, and a combined component 11 is provided on the side of the combined small plates, and each of the combined small plates 12 is connected to each other through the combined component 11 to form the breathable pad 4. In other words, the breathable pad 4 is formed by connecting and splicing a plurality of combined small plates 12, and the combined small plates 12 can be pre-designed with different arrangements and combinations of the breathable holes 9, and can be combined according to the requirements of the plugging process to form the corresponding breathable pad 4, so it can be used repeatedly and can achieve maximum utilization.
[0027] In one embodiment, the air-permeable pad 4 is an epoxy resin board or a phenolic resin board.
[0028] In one embodiment, the breathable pad 4 is in a mesh structure, and the breathable holes 9 are in a mesh shape. The breathable pad 4 of this embodiment combines the functions of a high-temperature release film and a breathable pad. After the glue is injected, the board can be easily removed and the excess ink glue on the surface can be easily removed to ensure the quality of the plugging holes.
[0029] In order to ensure the quality of the plugging hole, in one embodiment, a positioning foot for positioning the circuit board 3 is provided on the mounting surface 6, and the positioning foot positions the four corners of the circuit board 3 to facilitate the one-to-one correspondence between the guide hole 7, the through hole 8 and the air vent 9, thereby ensuring the accuracy of the plugging hole.
[0030] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0031] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A circuit board plugging fixture, characterized in that: It includes a mesh plate, a guide plate, a circuit board, a breathable pad and a base plate which are stacked in sequence, wherein the base plate is arranged on a plugging processing platform, the base plate has a mounting surface, the mounting surface is provided with a positioning column, the guide plate is provided with a positioning groove, the guide plate is installed on the base plate through the positioning groove, the circuit board is pressed onto the mounting surface through the guide plate, the breathable pad is arranged between the circuit board and the mounting surface, the guide plate is provided with a guide hole, the circuit board is provided with a through hole, the breathable pad is provided with an air hole, the guide hole, the through hole and the air hole are arranged correspondingly, the aperture of the guide hole is smaller than that of the through hole, and the aperture of the guide hole gradually decreases from away from the circuit board to close to the circuit board.
2. The circuit board plugging fixture according to claim 1, characterized in that: The aperture of the air-permeable hole is smaller than that of the through hole.
3. The circuit board plugging fixture according to claim 1, characterized in that: The aperture of the vent hole gradually increases from the direction close to the circuit board to the direction far away from the circuit board.
4. The circuit board plugging fixture according to claim 1, characterized in that: The aperture size of the air-permeable hole is 30-100 μm larger than the aperture size of the through hole.
5. The circuit board plugging fixture according to claim 1, characterized in that: The mesh plate is provided with a plurality of injection hole groups, one of the injection hole groups includes a plurality of mesh pores, and one of the injection hole groups is arranged corresponding to one of the guide holes.
6. The circuit board plugging fixture according to claim 1, characterized in that: The thickness of the air-permeable pad is smaller than the thickness of the circuit board.
7. The circuit board plugging fixture according to claim 1, characterized in that: The breathable pad includes a plurality of combined small plates, and the sides of the combined small plates are provided with combined components. The combined small plates are connected to each other through the combined components to form the breathable pad.
8. The circuit board plugging fixture according to claim 1, characterized in that: The air-permeable pad is an epoxy resin board or a phenolic resin board.
9. The circuit board plugging fixture according to claim 1, characterized in that: The air-permeable pad has a mesh structure.
10. The circuit board plugging fixture according to claim 1, characterized in that: The mounting surface is provided with positioning feet for positioning the circuit board.