Carbon oil hole filling jig

Abstract

The utility model relates to the field of circuit board hole filling jigs, in particular to a carbon oil hole filling jig, which comprises a jig base plate, an upper groove and a lower groove are respectively arranged on two opposite sides of the jig base plate, the upper groove and the lower groove are positioned on the same center line, a plurality of fixing pins are arranged in the upper groove at intervals, and the fixing pins are arranged in the lower groove at intervals. A circuit board is placed in the upper groove through the fixing pins, board taking grooves are formed between the two opposite groove walls of the upper groove and the edge of the jig substrate, the depth of the board taking grooves is larger than that of the upper groove, and the board taking grooves are communicated with the upper groove. Wherein a plurality of via holes are formed in the jig substrate at intervals, and the plurality of via holes penetrate through the upper groove and the lower groove. The device has the advantages of simple structure, low production and processing cost, high loading and unloading efficiency, capability of preventing the circuit board from being pressed and deformed and improving the hole filling quality, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board hole filling jigs, in particular to a carbon oil hole filling jig. Background Art

[0002] The carbon oil filling process of circuit boards is an important step in modern PCB manufacturing. It is commonly used in double-sided or multi-layer printed circuit boards to fill vias to enhance their electrical connections and improve reliability.

[0003] In the current existing technology, for the circuit board hole filling process, silk screen printing is generally adopted on one side of the circuit board, and ventilation is carried out on the other side to allow carbon oil to pass through the drilled holes on the circuit board. When exhausting the air, a pad, a fence, or positioning pins and other components are generally set on a ventilation plate with multiple ventilation holes arranged at intervals to lift the edge of the circuit board and raise the circuit board, and then the drilled holes of the circuit board are exhausted. These solutions have a complex multi-layer structure and high production and processing costs. The positioning of the circuit board is not accurate. Moreover, during silk screen printing and ventilation, the middle part of the circuit board is easily subjected to force due to the lifted edge, which causes the circuit board to be easily deformed, and then leads to poor hole filling. Utility Model Content

[0004] The purpose of the utility model is to provide a carbon oil filling fixture, which aims to solve the technical problems existing in the prior art, such as multi-layer complex structure, high production and processing costs, low efficiency and accuracy in loading and unloading circuit boards, and the possibility of circuit boards being deformed under pressure, which may lead to poor filling.

[0005] In order to solve the above technical problems, the utility model provides a carbon oil filling jig, including a jig substrate, wherein the two opposite surfaces of the jig substrate are respectively provided with an upper groove and a lower groove, the center lines of the upper groove and the lower groove coincide with each other, and a plurality of fixing pins matching the positioning holes on the circuit board are arranged at intervals in the upper groove, and the two opposite groove walls of the upper groove are both provided with a board removal groove, and the depth of the board removal groove is deeper than the upper groove; a plurality of conductive holes are arranged at intervals on the jig substrate, and the plurality of conductive holes pass through the upper groove and the lower groove.

[0006] In the above scheme, the jig substrate is provided with an upper groove for placing the circuit board separately, so that the side of the circuit board used for ventilation can be completely fitted with the jig substrate, preventing the circuit board from being deformed due to uneven force caused by partial suspension during the hole filling process, thereby affecting the quality of the circuit board and the hole filling; the lower groove is connected to the device for ventilation and forms a semi-closed cavity, which is connected to the outside only through multiple conductive holes. When ventilation is carried out, the ventilation uniformity at the multiple conductive holes can be improved, thereby improving the uniformity of the carbon oil filling holes, which is beneficial to improving the quality of the carbon oil filling holes; the center lines of the upper groove and the lower groove coincide, because The via holes must pass through the lower groove to exhaust the circuit board in the upper groove. Being on the same center line is not only convenient for design, but also convenient for production and processing, and the positioning of each via hole is more accurate; the circuit board is provided with multiple positioning holes for positioning, and multiple fixing pins fix the circuit board in the upper groove through these positioning holes to avoid the circuit board from shifting during the filling process, resulting in poor filling; the board removal groove can easily remove the circuit board from the upper groove, especially the depth of the board removal groove is deeper than the upper groove, which can make it easier to remove the circuit board, which is conducive to improving the loading and unloading efficiency of the circuit board, and thus improving the filling efficiency of the circuit board.

[0007] Preferably, the two plate-taking slots are symmetrical along the center line of the upper groove.

[0008] In the above scheme, the centrally symmetrical board removal slot can apply force to both ends of the circuit board simultaneously when loading and unloading the circuit board, and make the force on the circuit board uniform, thereby reducing the difficulty of loading and unloading the circuit board, which is conducive to improving the loading and unloading efficiency of the circuit board and further improving the filling efficiency of the circuit board.

[0009] Preferably, the depth of the upper groove is less than the thickness of the circuit board, and the length of the fixing pin is half the thickness of the circuit board.

[0010] In the above solution, the depth of the upper groove is less than the thickness of the circuit board. This is because when installing the circuit board, assuming that the circuit board can completely enter the upper groove, it will be more difficult to remove the circuit board, which is not conducive to improving the filling efficiency. The length of the fixing pin is half the length of the circuit board because the side of the circuit board away from the upper groove needs to be silk-screened. If the fixing pin passes through the circuit board and extends, the flow of the silk-screen carbon oil will be affected, which is not conducive to improving the filling quality.

[0011] Preferably, the groove wall of the lower groove is away from the edge of the circuit board.

[0012] In the above solution, the groove wall of the lower groove is away from the edge of the circuit board. In this way, all the conductive holes are within the range of the lower groove. The lower groove is combined with other devices for exhausting air to form an exhaust cavity, and each conductive hole is evenly exhausted, thereby improving the uniformity and stability of the carbon oil filling holes in various parts of the circuit board.

[0013] Preferably, a plurality of drill holes are provided at intervals on the circuit board, and the plurality of drill holes are opposite to the conductive holes one by one, and the aperture of the conductive hole close to one end of the upper groove is larger than the aperture of the drill hole.

[0014] In the above scheme, compared with setting pads, enclosures and other components on a ventilation plate with multiple ventilation holes arranged at intervals to support the edge of the circuit board and raise the circuit board, and then exhausting the drilled holes of the circuit board, the one-to-one correspondence between the drilled holes and the conductive holes makes the exhaust at each drilled hole more uniform and stable, thereby making the carbon oil distribution more uniform, which is beneficial to improving the quality of the circuit board hole filling; the aperture of the conductive hole close to one end of the upper groove is larger than the aperture of the drilled hole, which can allow a certain position deviation to avoid poor ventilation problems caused by poor contact, thereby improving the exhaust effect of the carbon oil.

[0015] Preferably, an outer expansion hole is provided at one end of the conducting hole close to the upper groove, and the diameter of the outer expansion hole is larger than that of the drilled hole.

[0016] In the above scheme, the outward expansion of the hole allows the carbon oil to flow more smoothly through the conductive hole and prevents the carbon oil from sticking back at the hole mouth, which is beneficial to improving the hole filling quality of the circuit board.

[0017] Preferably, the fixture substrate is made of aluminum with a thickness of 5 mm.

[0018] In the above solution, aluminum itself is easy to process and has the characteristics of a long service life, low maintenance cost, and high recycling value. The jig substrate is not subjected to too much force during hole filling, so the use of aluminum can reduce production and processing costs. The common thickness of circuit boards is approximately in the range of [0.2, 3.2] mm. Therefore, a jig substrate with a thickness of 5 mm can meet the design requirements of carbon oil hole filling jigs for most circuit boards. While saving production and processing costs, it effectively improves its adaptability to different types of circuit boards.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] Using only one jig substrate for placing the circuit board can simplify the structure of the circuit board for carbon oil filling, reduce production and processing costs, and enable the side of the circuit board used for exhaust to be completely in contact with the jig substrate, preventing the circuit board from being deformed due to uneven force caused by partial suspension during the filling process, thereby affecting the quality of the circuit board and the filling; when exhausting the carbon oil filling, the space formed by the lower groove can improve the exhaust uniformity at multiple vias, thereby improving the uniformity of the carbon oil filling, which is beneficial to improving the quality of the carbon oil filling; the upper groove cooperates with the fixing pin to fix the circuit board in the upper groove, and aligns the via hole with the circuit board, which can improve the positioning accuracy of the circuit board and avoid the circuit board from being offset during the filling process, resulting in poor filling; the board removal groove can easily remove the circuit board from the upper groove, especially the depth of the board removal groove is deeper than the upper groove, which can make it easier to remove the circuit board, which is beneficial to improving the loading and unloading efficiency of the circuit board, thereby improving the filling efficiency of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a top view of a carbon oil filling fixture.

[0023] Figure 2 for Figure 1 Cross-sectional view AA'.

[0024] Icon: 100- jig substrate; 110- upper groove; 120- lower groove; 130- conductive hole; 131- external expansion hole; 140- plate removal slot; 200- fixing pin. DETAILED DESCRIPTION

[0025] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0026] In the description of the present invention, it should be understood that terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0028] In this embodiment, please refer to Figure 1 and Figure 2 As shown, the utility model provides a carbon oil filling jig, including a jig substrate 100, wherein an upper groove 110 and a lower groove 120 are respectively provided on two opposite surfaces of the jig substrate 100, wherein the center lines of the upper groove 110 and the lower groove 120 coincide with each other, and a plurality of fixing pins 200 matching the positioning holes on the circuit board are provided at intervals in the upper groove 110, and a board removal groove 140 is provided on the two opposite groove walls of the upper groove 110, and the depth of the board removal groove 140 is deeper than that of the upper groove 110; a plurality of conductive holes 130 are provided at intervals on the jig substrate 100, and the plurality of conductive holes 130 pass through the upper groove 110 and the lower groove 120.

[0029] It can be understood that the side of the circuit board used for exhaust can be completely fitted with the bottom of the upper groove 110 to prevent the circuit board from being deformed due to uneven force caused by partial suspension during the hole filling process, thereby affecting the hole filling quality; the upper groove 110 and the lower groove 120 are located on the same center line. This is because the conductive hole 130 must pass through the lower groove 120 to extract air from the circuit board in the upper groove 110. Being on the same center line is not only convenient for design, but also convenient for production and processing, and the positioning of each conductive hole 130 is more accurate; multiple fixing pins 200 limit the position deviation of the circuit board in the upper groove 110 to avoid poor hole filling; the board removal groove 140 is opened on the groove wall of the upper groove 110 and extends to the edge of the jig substrate 100, that is, one side of the board removal groove 140 is connected to the upper groove 110. Since the groove depth of the board removal groove 140 is deeper than that of the upper groove 110, the groove bottom of the board removal groove 140 and the groove bottom of the upper groove 110 are in a stepped structure.

[0030] In addition, in some embodiments, the groove wall of the upper groove 110 may be away from the edge of the circuit board, and accordingly, the board removal groove 140 is arranged between the board edge of the circuit board and the board edge of the jig substrate 100; the board removal groove 140 can be arranged at any position on the groove wall of the upper groove 110, and the length of the portion thereof connected to the upper groove 110 can be less than or equal to the length of the groove wall of the upper groove 110, so as to be able to remove the circuit board.

[0031] In this embodiment, please refer to Figure 1 As shown, the two plate-taking slots 140 are symmetrical along the center line of the upper groove 110 .

[0032] It can be understood that when loading and unloading the circuit board, the force application points of the centrally symmetrical board removal groove 140 on the circuit board are also approximately centrally symmetrical about the center line of the upper groove 110. Therefore, the stress distribution on the circuit board will be more uniform, avoiding local stress concentration that causes deformation or damage when loading and unloading the circuit board. In addition, the centrally symmetrical force application can ensure that the rectangular plate maintains a good balance state when subjected to force, which means that the circuit board will not be significantly tilted or twisted due to excessive force on one side.

[0033] In addition, in some embodiments, multiple pairs of board removal slots 140 may be provided, and each pair of board removal slots 140 is symmetrical along the center line of the upper groove 110 , providing more options for loading and unloading circuit boards.

[0034] In this embodiment, please refer to Figure 2 As shown, the depth of the upper groove 110 is less than the thickness of the circuit board, and the length of the fixing pin 200 is half the thickness of the circuit board; the groove wall of the lower groove 120 is away from the edge of the circuit board.

[0035] It can be understood that the common thickness of the circuit board is [0.2, 3.2] mm. The depth of the upper groove 110 is 0.1 mm less than the thickness of the circuit board, so that the circuit board does not fully enter the upper groove 110, avoiding the difficulty of taking and placing the circuit board, resulting in low efficiency of replacing the circuit board; the length of the fixing pin 200 is half of the circuit board because the side of the circuit board away from the upper groove 110 needs to be silk-screened. Assuming that the fixing pin 200 passes through the circuit board and extends, the flow of the silk-screen carbon oil will be affected, which is not conducive to improving the hole filling quality; the groove depth of the lower groove 120 is 0.5 mm. While ensuring that the jig substrate 100 is well supported, the edge of the lower groove 120, that is, the groove wall of the lower groove 120, is usually greater than 5 mm from the edge of the circuit board to ensure that all the conductive holes 130 are within the range of the lower groove 120, and to increase the size of the exhaust cavity formed between the lower groove 120 and other devices for exhaust, to provide a guarantee for a smooth and uniform exhaust effect.

[0036] In addition, in some embodiments, the depth of the upper groove 110 is such that the circuit board does not completely enter the upper groove 110; the depth and shape structure of the lower groove 120 are such that the jig substrate 100 supports the circuit board well and the air extraction effect is smooth and uniform, such as a pyramid or a frustum; the length of the fixing pin 200 is such that it can locate and limit the position of the circuit board in the upper groove 110, but cannot extend to the outside of the circuit board to affect the silk screen printing and oil filling.

[0037] In this embodiment, please refer to Figure 1 As shown, a plurality of drill holes (not shown) are provided at intervals on the circuit board, and the plurality of drill holes are opposite to the conductive holes 130 one by one, and the aperture of the conductive hole 130 near the upper groove 110 is larger than the aperture of the drill hole; the conductive hole 130 near the upper groove 110 is provided with an outer expansion hole 131 at one end, and the aperture of the outer expansion hole 131 is larger than the drill hole.

[0038] It can be understood that compared to setting a pad, a fence and other components on a ventilation plate with multiple ventilation holes arranged at intervals to support the edge of the circuit board and raise the circuit board, and then exhausting the drilled holes of the circuit board, the one-to-one correspondence between the drilled holes and the guide holes 130 makes the exhaust at each drilled hole more uniform and stable, thereby making the final distribution of the carbon oil in the drilled hole more uniform; the aperture of the guide hole 130 near the end of the upper groove 110 is larger than the aperture of the drilled hole, which can allow a certain position deviation between the guide hole 130 and the drilled hole to avoid Due to problems such as poor contact, poor ventilation and obstructed carbon oil flow caused by offset of hole processing position, this end is set as an outward-expanded hole 131, which can make the carbon oil flow more smoothly when passing through the conductive hole 130 and prevent carbon oil from sticking back at the hole mouth. The outward-expanded hole 131 is conical. Except for the outward-expanded hole 131, the rest of the conductive hole 130, that is, the part from the outward-expanded hole 131 to the lower groove 120, is a straight hole with a smaller aperture than the drilled hole, which can provide better ventilation effect, improve the uniformity of carbon oil filling, and facilitate maintenance.

[0039] In addition, in some embodiments, the conducting hole 130 may also be a tapered structure that gradually shrinks from the upper groove 110 to the lower groove 120 .

[0040] In this embodiment, the fixture substrate 100 is made of aluminum with a thickness of 5 mm.

[0041] In addition, in some embodiments, the thickness of the jig substrate 100 can also be changed according to the depth of the upper and lower grooves 120, that is, according to the thickness of the circuit board, but it is necessary to pay attention to whether its supporting performance for the circuit board and its own anti-deformation ability are good.

[0042] The specific application process of this utility model is as follows:

[0043] The upper groove 110 of the jig substrate 100 is installed upward to the designated position, and the lower groove 120 and the device for exhausting air form a semi-enclosed exhaust cavity, which is connected to the outside world only through the conductive hole 130; the circuit board is installed to the designated position of the upper groove 110 through multiple fixing pins 200, so that the circuit board is completely fitted to the bottom of the upper groove 110, and multiple drill holes and conductive holes 130 are aligned one by one, and silk screen printing and oil filling are started, and carbon oil passes through each drill hole and conductive hole 130 in turn; after the hole filling is completed, force is applied to the two opposite edges of the circuit board through two material extraction troughs to smoothly remove the circuit board from the upper groove 110.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A carbon oil filling fixture, characterized in that: include: A jig substrate, wherein an upper groove and a lower groove are respectively provided on two opposite surfaces of the jig substrate, the center lines of the upper groove and the lower groove coincide with each other, a plurality of fixing pins matching the positioning holes on the circuit board are arranged at intervals in the upper groove, and a board removal groove is provided on the two opposite groove walls of the upper groove, the depth of the board removal groove is deeper than that of the upper groove; a plurality of conductive holes are arranged at intervals on the jig substrate, and the plurality of conductive holes pass through the upper groove and the lower groove.

2. The carbon oil filling fixture according to claim 1, characterized in that: The two plate taking grooves are symmetrical along the center line of the upper groove.

3. The carbon oil filling fixture according to claim 1, characterized in that: The depth of the upper groove is less than the thickness of the circuit board, and the length of the fixing pin is half the thickness of the circuit board.

4. The carbon oil filling fixture according to claim 3, characterized in that: The groove wall of the lower groove is away from the edge of the circuit board.

5. The carbon oil filling fixture according to claim 1, characterized in that: The circuit board is provided with a plurality of drill holes at intervals, and the plurality of drill holes are opposite to the conductive holes one by one, and the aperture of the conductive hole close to one end of the circuit board is larger than the aperture of the drill holes.

6. The carbon oil filling fixture according to claim 5, characterized in that: An outer expansion hole is provided at one end of the conducting hole close to the upper groove, and the diameter of the outer expansion hole is larger than the diameter of the drilled hole.

7. The carbon oil filling fixture according to any one of claims 1 to 6, characterized in that: The fixture substrate is made of aluminum with a thickness of 5 mm.

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