CN113382543A - High aspect ratio printed circuit board resin hole plugging device - Google Patents

Abstract

The invention discloses a resin hole plugging device for a printed circuit board with a high aspect ratio, which belongs to the technical field of resin hole plugging of the printed circuit board. This kind of high aspect ratio printed circuit board resin consent device scribbles fat and scrapes fat can go on in step, easy operation can also press from both sides tight printed circuit board and be difficult to press from both sides it bad convenient and fast to be difficult to leave the bubble in the resin of plugging in the printed circuit board hole.

Description

High aspect ratio printed circuit board resin hole plugging device

Technical Field

The invention relates to the technical field of printed circuit board resin hole plugging, in particular to a resin hole plugging device for a printed circuit board with a high aspect ratio.

Background

The resin hole-plugging process flow is more and more widely applied in the printed circuit board industry in recent years, and is particularly favored in products with high layer number and large board thickness. It is desirable to use resin plugs to solve a number of problems that cannot be solved by using green oil plugs or press-fit resin plugs.

The traditional high-aspect-ratio printed circuit board resin hole plugging device has the following defects:

1. resin is required to be applied and scraped step by step, and the operation is complicated;

2. when the printed circuit board is fixed, the operation is complicated and the printed circuit board is easy to be damaged;

3. air bubbles tend to remain in the resin inserted into the holes of the printed circuit board.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a resin plugging device for a printed circuit board with a high aspect ratio, which can be used for simultaneously performing greasing and grease scraping, is simple to operate, can be used for conveniently and quickly clamping the printed circuit board and is not easy to damage the printed circuit board, and bubbles are not easy to leave in resin plugged into holes of the printed circuit board.

The technical purpose of the invention is realized by the following technical scheme: a resin hole plugging device for a printed circuit board with a high aspect ratio is used for plugging a resin hole on the printed circuit board with the high aspect ratio, and comprises a greasing and greasing integrated mechanism used for coating resin on the printed circuit board, a driving mechanism and a wiping part, wherein the driving mechanism is used for driving the wiping part to move transversely or longitudinally, the wiping part is connected with a resin storage tank through a transmission pipe, the resin storage tank is filled with resin for plugging the resin hole, the transmission pipe is provided with a transmission pump, the wiping part comprises an installation plate and a wiping blade which are fixedly connected together from top to bottom, the installation plate is installed on the driving mechanism, the bottom end of the wiping blade is in a sharp edge shape with a slope, a first trunk passage and a second trunk passage are arranged from top to bottom in the wiping blade, a plurality of capillary branches for communicating the first trunk passage and the second trunk passage are arranged between the first trunk passage and the second trunk passage, and the first trunk passage is communicated with the transmission pipe, the second trunk path channel is positioned at the sharp-edge-shaped structure of the coating scraper, a slope surface of the sharp-edge-shaped structure of the coating scraper is provided with a grease outlet seam along the length direction of the second trunk path channel, and the grease outlet seam connects the second trunk path channel with the outside; the positioning mechanism is supported and arranged below the greasing and greasing integrated mechanism and used for positioning a printed circuit board, and comprises a workbench and a plurality of lower vertical plates, wherein the workbench is horizontally arranged, the lower vertical plates are arranged on the outer side of the workbench in a surrounding manner, each lower vertical plate is provided with a transverse plate, the transverse plates are connected end to end, the edges of the workbench are provided with a plurality of vertical plates, the plurality of vertical plates are also connected end to end, an elastic air-impermeable film is connected between the vertical plates and the transverse plates, the lower vertical plates, the workbench, the vertical plates, the transverse plates and the elastic air-impermeable film jointly form an annular cavity, the lower vertical plates are also provided with a plurality of exhaust pipes in a penetrating manner, one ends of the exhaust pipes are inserted into the annular cavity, the other ends of the exhaust pipes are left outside, each exhaust pipe is provided with a first one-way air valve, and the first one-way air valves allow air in the annular cavity to be exhausted to the outside along the exhaust pipes, but does not allow ambient air to enter the annular cavity along the exhaust tube. And the air pumping and inflating integrated mechanism is used for inflating the annular cavity.

Furthermore, the driving mechanism comprises two electric cylinders, fixed ends of the two electric cylinders are symmetrically arranged at the top of the lower vertical plate, an upper vertical plate is arranged at the telescopic movable end of each electric cylinder, a lead screw and a slide bar are connected between the two upper vertical plates, one end of the lead screw penetrates through the upper vertical plate and is connected with a motor, and the lead screw and the slide bar penetrate through the mounting plate simultaneously.

Further, supporting plates are fixedly arranged between the electric cylinder and the lower vertical plate and between the electric cylinder and the upper vertical plate, and the supporting plates are wider than the upper vertical plate and the lower vertical plate.

Furthermore, the end part of the sharp-edge-shaped structure of the coating scraper is a flexible part.

Furthermore, a plurality of bulges and grease collecting grooves are arranged on the upper end face of the workbench in a staggered manner.

Further, the air exhaust and inflation integrated mechanism is arranged at the bottom of the workbench and comprises an air exhaust and inflation dual-purpose pump and an air flow pipeline, the air flow pipeline comprises an air flow main pipe, a plurality of first air flow branch pipes and a plurality of second air flow branch pipes, the first air flow branch pipes and the plurality of second air flow branch pipes are separated from the air flow main pipe, the air flow main pipe is connected with the air exhaust and inflation dual-purpose pump, the plurality of first air flow branch pipes penetrate through the workbench and extend into the annular cavity, the plurality of second air flow branch pipes penetrate through the workbench and extend into the inner sides of the plurality of vertical plates, the plurality of second air flow branch pipes penetrate out of the bulge part, second one-way air valves are arranged on the first air flow branch pipes and allow the first air flow branch pipes to inflate into the annular cavity but do not allow the annular cavity to exhaust outwards along the first air flow branch pipes, the second airflow branch pipe is provided with a third one-way air valve, the third one-way air valve allows air on the upper side of the workbench to be drawn out by the second airflow branch pipe, but does not allow air to enter the upper side of the workbench along the second airflow branch pipe, and the second airflow branch pipe penetrates through the side wall of one end of the upper side of the workbench and is provided with a plurality of air holes.

Furthermore, a flow guide top cover is coaxially and fixedly installed on the penetrating end of the second airflow branch pipe, the flow guide top cover is of a conical structure with the pointed end upwards, and the flow guide top cover and the second airflow branch pipe form an umbrella-shaped structure.

Further, one end of the exhaust pipe located outside the annular cavity is provided with a sealing plug.

In conclusion, the invention has the following beneficial effects:

(1) this kind of high aspect ratio printed circuit board resin consent device carries the resin in the resin storage tank to the blade coating piece along the transmission pipe through the transfer pump in, again from the interior flow of blade coating piece to printed circuit board on, during under actuating mechanism's drive effect, scribble the scraper blade and continue to scrape the flow to the resin on printed circuit board, stop up to the resin with the preformed hole on the printed circuit board, whole process has realized that the rubber coating goes on with the frictioning is synchronous, the operation is very simple.

(2) This kind of high aspect ratio printed circuit board resin consent device, when being full of the air in the annular cavity, put printed circuit board on the elasticity air-impermeable film of tympanites and push with strength, make the air in the annular cavity outwards extruded along the blast pipe, the elasticity air-impermeable film at this moment is shrivelled gradually and is shrunken flat, the elasticity air-impermeable film of elasticity expansion originally also hugs closely gradually and firmly hoops printed circuit board's edge, realize the fixed to printed circuit board from this, the above-mentioned process only need push down printed circuit board and can fix printed circuit board, the operation is very simple, and flexible elasticity air-impermeable film also can not press from both sides bad printed circuit board, it is better to printed circuit board's protectiveness.

(3) This kind of high aspect ratio printed circuit board resin consent device, be equipped with and bleed and aerify integrative mechanism, this bleed and aerify integrative mechanism can aerify annular cavity, and can form the negative pressure between printed circuit board and workstation through bleeding, make and paint the resin on printed circuit board and can be inhaled to the resin preformed hole of printed circuit board in, make so be difficult to leave the bubble in the resin preformed hole, the resin can evenly be filled in the resin preformed hole, thereby the validity of resin consent has been ensured.

Drawings

FIG. 1 is an overall view of a resin plugging device for a printed circuit board with a high aspect ratio according to the present invention when the printed circuit board is not placed;

FIG. 2 is an enlarged view of FIG. 1A;

FIG. 3 is an overall view of a high aspect ratio printed circuit board resin plugging device of the present invention when a printed circuit board has been placed;

FIG. 4 is an enlarged schematic view of FIG. 3B;

FIG. 5 is an overall view of a second airflow manifold of a high aspect ratio printed circuit board resin plugging device of the present invention;

FIG. 6 is a front view of a squeegee assembly of a high aspect ratio printed circuit board resin plugging device of the present invention;

FIG. 7 is a cross-sectional view of the structure of FIG. 6C-C;

fig. 8 is a longitudinal sectional view of fig. 6D-D.

In the figure: 1. an electric cylinder; 2. a support plate; 3. an upper vertical plate; 4. a motor; 5. a screw rod; 6. a slide bar; 7. a resin storage tank; 8. a conveying pipe; 9. a transfer pump; 10. coating and scraping pieces; 1001. mounting a plate; 1002. coating a scraper; 1003. a first trunk passage; 1004. a capillary branch; 1005. a second trunk passage; 1006. fat outlet seams; 1007. a flexible portion; 11. a lower vertical plate; 12. a work table; 1201. a raised portion; 1202. a grease collection tank; 13. a vertical plate; 14. a transverse plate; 15. an elastic, air impermeable film; 16. an exhaust pipe; 17. a first one-way air valve; 18. a dual-purpose pump for air pumping and inflating; 19. an air flow line; 1901. an air flow main pipe; 1902. a first gas flow branch pipe; 1903. a second one-way air valve; 1904. a second gas flow branch pipe; 1905. a third one-way air valve; 1906. a flow guide top cover; 1907. and (4) air holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, a resin plugging device for a printed circuit board with a high aspect ratio, which is used for plugging a resin hole in the printed circuit board with a high aspect ratio, includes a grease-applying and scraping integrated mechanism for scraping resin on the printed circuit board, and includes a driving mechanism and a scraping member 10, the driving mechanism is used for driving the scraping member 10 to move along a transverse direction or a longitudinal direction, the scraping member 10 is connected to a resin storage tank 7 through a transfer pipe 8, the resin storage tank 7 contains plugging resin, the transfer pipe 8 is provided with a transfer pump 9, the scraping member 10 includes a mounting plate 1001 and a scraping plate 1002 which are fixedly connected together, the mounting plate 1001 is mounted on the driving mechanism, the bottom end of the scraping plate 1002 is in a sharp edge shape with a slope, a first trunk passage 1003 and a second trunk passage 1005 are formed inside the scraping plate 1002 from top to bottom, and a plurality of capillary branches 1004 are formed between the first trunk passage 1003 and the second trunk passage 1005, the first trunk passage 1003 is communicated with the transmission pipe 8, the second trunk passage 1005 is located at the sharp-edge-shaped structure of the coating scraper 1002, a grease outlet seam 1006 is formed in the slope surface of the sharp-edge-shaped structure of the coating scraper 1002 along the length direction of the second trunk passage 1005, and the second trunk passage 1005 is communicated with the outside through the grease outlet seam 1006; the positioning mechanism is supported and arranged below the greasing and greasing integrated mechanism and used for positioning the printed circuit board, and comprises a workbench 12 which is horizontally arranged and a plurality of lower vertical plates 11 which are arranged outside the workbench 12 in a surrounding way, each lower vertical plate 11 is provided with a horizontal plate 14, the plurality of horizontal plates 14 are connected end to end, the edge of the workbench 12 is provided with a plurality of vertical plates 13, the plurality of vertical plates 13 are also connected end to end, an elastic air-impermeable film 15 is connected between the vertical plates 13 and the horizontal plates 14, the lower vertical plates 11, the workbench 12, the vertical plates 13, the horizontal plates 14 and the elastic air-impermeable film 15 jointly form an annular cavity, the lower vertical plates 11 are also provided with a plurality of exhaust pipes 16 in a penetrating way, one ends of the exhaust pipes 16 are inserted into the annular cavity, the other ends of the exhaust pipes are left outside, each exhaust pipe 16 is provided with a first one-way air valve 17, and the first, but does not allow ambient air to pass into the annular cavity along the exhaust tube 16. The air pumping and inflating integrated mechanism is used for inflating the annular cavity.

Through the technical scheme, when resin is coated on the printed circuit board, the resin in the resin storage tank 7 is conveyed into the coating part along the conveying pipe 8 through the conveying pump 9, after the resin is conveyed into the coating part, as shown in fig. 6, 7 and 8, the resin is firstly gathered in the first trunk passage 1003, then flows into the second trunk passage 1005 along the capillary branch 1004, then flows out to the outside along the grease outlet seam 1006 in the second trunk passage 1005, and finally flows downwards along the slope surface at the bottom end of the coating scraper 1002 until the resin falls on the printed circuit board, during the period, under the driving action of the driving mechanism, the coating scraper 1002 continuously scrapes the resin on the printed circuit board until the resin plugs the reserved hole on the printed circuit board, the whole process realizes that the coating and the scraping are carried out synchronously, the operation is very simple, and the two trunk passages play the role of buffering the resin, the capillary branches 1004 are arranged between the two trunk passages to prevent the resin from being cut off, so that the resin is uniformly output and flows, the flow rate of the resin is reduced, the flow range of the resin is expanded, and the resin can slowly, thoroughly and uniformly flow from the first trunk passage 1003 to the second trunk passage 1005, so that the resin is prevented from being cut off due to the fact that air bubbles are left in the resin gathered in the second trunk passage 1005. The high aspect ratio printed circuit board resin hole plugging device, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the positioning mechanism comprises an annular cavity formed by a lower vertical plate 11, a workbench 12, a vertical plate 13, a horizontal plate 14 and an elastic air-impermeable film 15, the annular cavity exhausts outwards through an exhaust pipe 16, the annular cavity inflates inwards through an air-extracting and inflating integrated mechanism, when the annular cavity is filled with air, the printed circuit board is placed on the swelled elastic air-impermeable film 15 and is pressed forcibly, so that the air in the annular cavity is extruded outwards along the exhaust pipe 16, the elastic air-impermeable film 15 shrinks and becomes shriveled gradually, the originally elastically expanded elastic air-impermeable film 15 is also attached to and firmly hoops the edge of the printed circuit board, thereby fixing the printed circuit board is realized, and the printed circuit board can be fixed only by pressing down in the above process, the operation is very simple, and flexible elasticity does not have ventilated membrane 15 to press from both sides bad printed circuit board yet, and is better to printed circuit board's protectiveness, when needs take off printed circuit board, through bleed air inflate integrative mechanism to annular cavity in inflate can, elasticity ventilated membrane 15 this moment is bloated again to no longer fix printed circuit board, can take printed circuit board away very conveniently.

Further, as shown in fig. 1 and 3, the driving mechanism includes two electric cylinders 1, fixed ends of the two electric cylinders 1 are symmetrically installed on the top of the lower vertical plate 11, an upper vertical plate 3 is installed on a telescopic movable end of each electric cylinder 1, a lead screw 5 and a slide bar 6 are connected between the two upper vertical plates 3, wherein one end of the lead screw 5 penetrates through the upper vertical plate 3 and is connected with a motor 4, the lead screw 5 and the slide bar 6 simultaneously penetrate through the mounting plate 1001, the two upper vertical plates 3 can be driven to move up and down by the two electric cylinders 1, so as to drive the lead screw 5, the slide bar 6 and the mounting plate 1001 to move up and down, and further realize the lifting adjustment of the whole piece of the scratch-coated part 10, so that the invention can adapt to printed circuit boards with different thicknesses; the motor 4, the lead screw 5 and the slide bar 6 form a lead screw transmission mechanism, and under the combined action of the three, the mounting plate 1001 can reciprocate along the lead screw 5, so that the whole scraping and coating piece 10 can also reciprocate along the lead screw 5 for scraping and printing the circuit board.

Further, as shown in fig. 1 and 3,support plates 2 are fixedly disposed between theelectric cylinder 1 and the lowervertical plate 11 and between theelectric cylinder 1 and the upper vertical plate 3, thesupport plates 2 are wider than the upper vertical plate 3 and the lowervertical plate 11, and thesupport plates 2 are used for increasing the contact area between theelectric cylinder 1 and the lowervertical plate 11 and between theelectric cylinder 1 and the upper vertical plate 3, so that the mounting structure therebetween is firmer.

Further, as shown in fig. 6, 7 and 8, the end of the sharp-edged structure of thecoating scraper 1002 is aflexible portion 1007, when thecoating scraper 1002 is used for coating and scraping a printed circuit board, theflexible portion 1007 at the end of the coating scraper will press to the printed circuit board, and theflexible portion 1007 bends and deforms to be more suitable for the printed circuit board, so that resin on the printed circuit board can be coated and scraped more conveniently, and theflexible portion 1007 cannot scratch the printed circuit board in the coating and scraping process, thereby achieving a good protection effect.

Further, as shown in fig. 1, 2, 3 and 4, a plurality ofridges 1201 andgrease collection grooves 1202 are staggered on the upper end surface of the table 12, and the resin falling on the table 12 flows into thegrease collection grooves 1202 along theridges 1201, thereby facilitating the subsequent centralized processing of the resin.

Further, the air-extracting and inflating integrated mechanism is arranged at the bottom of the workbench 12 and comprises an air-extracting and inflating dual-purpose pump 18 and an air flow pipeline 19, the air flow pipeline 19 comprises an air flow main pipe 1901 and a plurality of first air flow branch pipes 1902 and a plurality of second air flow branch pipes 1904 which are separated from the air flow main pipe 1901, wherein the air flow main pipe 1901 is connected with the air-extracting and inflating dual-purpose pump 18, the plurality of first air flow branch pipes 1902 all penetrate through the workbench 12 and extend into the annular cavity, the plurality of second air flow branch pipes 1904 all penetrate through the raised portions 1201, the first air flow branch pipes 1902 are provided with second one-way air valves 1903, the second one-way air valves 1903 allow the first air flow branch pipes 1902 to inflate the annular cavity, but do not allow the annular cavity to exhaust outwards along the first air flow branch pipes 1902, the second air flow branch pipes 1904 are provided with third one-way air valves 1905, the third one-way air valve 1905 allows air on the upper side of the worktable 12 to be drawn out by the second air branch 1904, but does not allow air to enter the upper side of the worktable 12 along the second air branch 1904, and the side wall of the second air branch 1904 penetrating to one end of the upper side of the worktable 12 is provided with a plurality of air holes 1907. When the annular cavity needs to be inflated, the air-extracting and inflating dual-purpose pump 18 is started, so that the air-extracting and inflating dual-purpose pump 18 inflates the annular cavity along the air flowmain pipe 1901 and the first airflow branch pipe 1902; when resin coated on the printed circuit board needs to be sucked into the resin preformed hole on the printed circuit board, the air-extracting and air-inflating dual-purpose pump 18 is started, the air-extracting and air-inflating dual-purpose pump 18 extracts air outwards along the air flowmain pipe 1901 and the second airflow branch pipe 1904, please refer to fig. 4, at this time, negative pressure is formed between theworkbench 12 and the printed circuit board, so that the resin coated on the printed circuit board can be sucked into the resin preformed hole of the printed circuit board, bubbles are not easy to remain in the resin preformed hole, the resin can be uniformly filled in the resin preformed hole, and the effectiveness of resin hole plugging is ensured.

Further, aguide top cover 1906 is coaxially and fixedly mounted on a penetrating end of the secondairflow branch pipe 1904, theguide top cover 1906 is of a conical structure with the tip facing upwards, the guide top cover and the secondairflow branch pipe 1904 form an umbrella-shaped structure, when resin drops downwards from a resin reserved hole in the printed circuit board, the dropped resin drops onto theguide top cover 1906 and cannot drop onto the secondairflow branch pipe 1904 to cause blockage, the resin is guided to thebulge part 1201 after dropping onto theguide top cover 1906, the resin is finally collected into thegrease collection groove 1202 and can be subsequently cleaned in a centralized mode, and theguide top cover 1906 plays a good role in shielding, guiding and blocking prevention.

Furthermore, one end of theexhaust pipe 16 located outside the annular cavity is provided with a sealing plug, and when the annular cavity is inflated by an air pumping and inflating integrated mechanism, theexhaust pipe 16 can be blocked by the sealing plug, so that the inflation efficiency is prevented from being influenced by the inflation and the exhaust of the annular cavity.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (8)

1. A high aspect ratio printed circuit board resin hole plugging device for performing resin hole plugging on a high aspect ratio printed circuit board, comprising:

the integral mechanism for greasing and greasing is used for smearing resin on a printed circuit board and comprises a driving mechanism and a smearing and scraping piece (10), wherein the driving mechanism is used for driving the smearing and scraping piece (10) to move along the transverse direction or the longitudinal direction, the smearing and scraping piece (10) is connected with a resin storage tank (7) through a transmission pipe (8), resin for plugging holes is contained in the resin storage tank (7), a transmission pump (9) is arranged on the transmission pipe (8), the smearing and scraping piece (10) comprises a mounting plate (1001) and a smearing scraper blade (1002) which are fixedly connected together from top to bottom, the mounting plate (1001) is mounted on the driving mechanism, the bottom end of the smearing scraper blade (1002) is in a sharp edge shape with a slope, a first trunk channel (1003) and a second trunk channel (1005) are formed in the smearing scraper blade (1002) from top to bottom, and a plurality of capillary branches (1004) communicating the first trunk channel (1003) and the second trunk channel (1005) are formed between the first trunk channel (1002) and the second trunk channel (1005), the first trunk passage (1003) is communicated with the conveying pipe (8), the second trunk passage (1005) is located at a sharp-edge-shaped structure of the coating scraper (1002), a grease outlet seam (1006) is formed in the slope surface of the sharp-edge-shaped structure of the coating scraper (1002) along the length direction of the second trunk passage (1005), and the grease outlet seam (1006) is used for communicating the second trunk passage (1005) with the outside;

the positioning mechanism is supported and arranged below the greasing and greasing integrated mechanism and used for positioning a printed circuit board, and comprises a workbench (12) which is horizontally arranged and a plurality of lower vertical plates (11) which are arranged outside the workbench (12) in a surrounding way, wherein each lower vertical plate (11) is provided with a transverse plate (14) and a plurality of transverse plates (14) which are connected end to end, the edge of the workbench (12) is provided with a plurality of vertical plates (13), the plurality of vertical plates (13) are also connected end to end, an elastic air-impermeable film (15) is connected between each vertical plate (13) and the transverse plate (14), the lower vertical plate (11), the workbench (12), the vertical plates (13), the transverse plates (14) and the elastic air-impermeable film (15) jointly form an annular cavity, and a plurality of exhaust pipes (16) are arranged on the lower vertical plate (11) in a penetrating way, one end of the exhaust pipe (16) is inserted into the annular cavity, the other end of the exhaust pipe is left outside, a first one-way air valve (17) is arranged on each exhaust pipe (16), the first one-way air valve (17) allows air in the annular cavity to be exhausted to the outside along the exhaust pipe (16), but does not allow outside air to enter the annular cavity along the exhaust pipe (16).

And the air pumping and inflating integrated mechanism is used for inflating the annular cavity.

2. A high aspect ratio printed circuit board resin hole plugging device according to claim 1, wherein: actuating mechanism includes two electronic jar (1), two the stiff end symmetry of electronic jar (1) is installed the top of riser (11) down, every all install riser (3) on the flexible activity end of electronic jar (1), two be connected with lead screw (5) and slide bar (6) between riser (3), wherein the one end of lead screw (5) is run through riser (3) are connected with motor (4), just lead screw (5) with slide bar (6) run through simultaneously mounting panel (1001).

3. A high aspect ratio printed circuit board resin hole plugging device according to claim 2, wherein: supporting plates (2) are fixedly arranged between the electric cylinder (1) and the lower vertical plate (11) and between the electric cylinder (1) and the upper vertical plate (3), and the supporting plates (2) are wider than the upper vertical plate (3) and the lower vertical plate (11).

4. A high aspect ratio printed circuit board resin hole plugging device according to claim 1, wherein: the end part of the sharp-edge-shaped structure of the coating scraper (1002) is a flexible part (1007).

5. A high aspect ratio printed circuit board resin hole plugging device according to claim 1, wherein: the upper end face of the working table (12) is provided with a plurality of bulges (1201) and grease collecting grooves (1202) in a staggered manner.

6. The high aspect ratio printed circuit board resin hole plugging device of claim 5, wherein: the air extracting and inflating integrated mechanism is arranged at the bottom of the workbench (12) and comprises an air extracting and inflating dual-purpose pump (18) and an air flow pipeline (19), the air flow pipeline (19) comprises an air flow main pipe (1901), a plurality of first air flow branch pipes (1902) and a plurality of second air flow branch pipes (1904) which are separated from the air flow main pipe (1901), the air flow main pipe (1901) is connected with the air extracting and inflating dual-purpose pump (18), the plurality of first air flow branch pipes (1902) penetrate through the workbench (12) and extend into the annular cavity, the plurality of second air flow branch pipes (1904) penetrate through the workbench (12) and extend into the inner sides of the plurality of vertical plates (13), the plurality of second air flow branch pipes (1904) penetrate out of the bulge part (1201), and a second one-way valve (1903) is arranged on the first air flow branch pipes (1902), the second one-way air valve (1903) allows the first air flow branch pipe (1902) to inflate into the annular cavity, but does not allow the annular cavity to exhaust outwards along the first air flow branch pipe (1902), a third one-way air valve (1905) is arranged on the second air flow branch pipe (1904), the third one-way air valve (1905) allows air on the upper side of the workbench (12) to be drawn outwards by the second air flow branch pipe (1904), but does not allow air to enter the upper side of the workbench (12) along the second air flow branch pipe (1904), and a plurality of air holes (1907) are formed in the side wall of one end, penetrating through the workbench (12), of the second air flow branch pipe (1904).

7. The high aspect ratio printed circuit board resin hole plugging device of claim 6, wherein: a flow guide top cover (1906) is coaxially and fixedly installed on the penetrating end of the second air flow branch pipe (1904), the flow guide top cover (1906) is of a conical structure with the tip upwards, and the flow guide top cover and the second air flow branch pipe (1904) form an umbrella-shaped structure.

8. A high aspect ratio printed circuit board resin hole plugging device according to claim 1, wherein: the end of the exhaust tube (16) outside the annular cavity is provided with a sealing plug.

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