A circuit board dustless packaging machine

Abstract

The present application relates to the technical field of sheet packaging, and relates to a circuit board dust-free packaging machine, which comprises a feeding machine, a shielding sleeve frame, a conveying pressure roller, a power output device, a mounting frame installed in the shielding sleeve frame close to the feeding machine and close to the conveying pressure roller, a cleaning frame symmetrically installed on both sides of the mounting frame, a triangular protruding block installed in the cleaning frame, triangular limiting blocks symmetrically arranged on both sides of the inner wall of the cleaning frame and leaving a gap, the triangular limiting blocks being distributed on both sides of the protruding corners of the triangular protruding block, through openings being formed on both sides of the cleaning frame, and adhesive rollers being symmetrically and rotatably arranged on both sides of the mounting frame. The adhesive rollers, the triangular protruding block and the triangular limiting blocks form a fluid channel, which can stick away dust in the process of conveying the circuit board by the adhesive rollers and clean the dust adhered to the adhesive rollers, so that the circuit board is not polluted by dust in the packaging process.

Description

Technical Field

[0001] This invention relates to the field of circuit board packaging technology, and more specifically, to a dust-free packaging machine for circuit boards. Background Technology

[0002] PCBs (Printed Circuit Boards) are the carriers that enable electrical connections between electronic components, playing a vital role. Because PCBs are sensitive to moisture, their packaging requires sealing, the addition of desiccants, vacuum sealing, and ensuring that no dust enters during the packaging process.

[0003] In the packaging environment of circuit boards, materials may become contaminated with dust generated during equipment operation and with dust particles from packaging bags, cartons, and other materials that are prone to detachment during use. This dust will adhere to the circuit boards during the packaging process and will eventually be packaged together with the circuit boards. If it is not cleaned in time, it may easily cause malfunctions in subsequent use. Summary of the Invention

[0004] The present invention aims to solve the technical problems existing in the prior art. To this end, the present invention provides a cleanroom packaging machine for circuit boards.

[0005] To achieve the above objectives, the present invention provides a cleanroom packaging machine for circuit boards, comprising: a feeding machine; multiple shielding frames arranged side-by-side and connected to one side of the feeding machine; multiple sets of conveying rollers arranged laterally according to the conveying direction of the feeding machine and extending into the shielding frames; a power output device installed on the outer wall of the shielding frames to drive the conveying rollers to rotate; a mounting frame installed in the shielding frames near the feeding machine and close to the conveying rollers; a cleaning frame symmetrically installed on both sides of the mounting frame; a triangular protrusion with a protruding angle installed in the cleaning frame; and a triangular limiting block for... The cleaning frame is arranged on both sides of the inner wall of the cleaning frame with gaps; the triangular limiting blocks are distributed on both sides of the protruding corners of the triangular protrusions with gaps; the cleaning frame has through openings on both sides; the adhesive rollers are symmetrically rotated on both sides of the mounting frame and driven by the power output device; the cleaning frame and the triangular limiting blocks are both in contact with the curved surface of the adhesive rollers, and part of the adhesive rollers are exposed in the gaps between the triangular limiting blocks on both sides. Liquid enters through the opening on one side, flows through the gap channel between the triangular limiting block and the triangular protrusion, contacts the exposed adhesive rollers in the gaps, and then flows out from the opening on the other side.

[0006] As a further improvement to the solution, it also includes: a curved protrusion, which is located on the apex of the triangular limiting block near the side of the feeder and contacts the adhesive roller.

[0007] As a further improvement to the solution, it also includes: a dryer installed on the washing frame; the apex of the lower part of the triangular limiting block is an arc-shaped rounded apex.

[0008] As a further improvement to the solution, it also includes: an adsorption roller, which is rotatably mounted on the triangular limiting block near the feeder and in contact with the adhesive roller; a squeezing tube, which is rotatably mounted on the triangular limiting block and squeezes the adsorption roller; and a drain pipe, which is mounted on the mounting frame and extends into the squeezing tube; the squeezing tube has radially vertically penetrating channel holes evenly opened in the circumference, and the drain pipe has a liquid inlet at the top.

[0009] As a further improvement to the solution, it also includes: an isolation brush plate, which is symmetrically installed on the shielding frame on the side close to the feeder.

[0010] As a further improvement to the solution, it also includes: an electrostatic eliminator, which is symmetrically arranged vertically within the shielding frame and located between the conveying pressure rollers.

[0011] As a further improvement to the solution, it also includes: a screw drive device, disposed within a shielding frame near the mounting frame; a carrier plate, connected to the drive screw of the screw drive device for lifting and lowering movement; four angle plates, slidably disposed within guide grooves opened in the carrier plate; a first transmission belt, centrally mounted on the carrier plate; a drive motor, mounted at the bottom of the carrier plate; a rotating plate, connected to the output shaft of the drive motor; springs, disposed within the guide grooves; and tension springs, connecting each of the angle plates to the rotating plate, pulling the angle plates to move as the rotating plate rotates.

[0012] As a further improvement to the solution, it also includes: a second transmission belt, disposed within the shielding sleeve frame near the side of the carrier plate; a traction transmission module, symmetrically mounted on the second transmission belt near the side of the carrier plate; a telescopic push rod, mounted on the top of the shielding sleeve frame; a film-pulling vacuum module, mounted on the movable end of the telescopic push rod and suspended above the second transmission belt; electric push blocks, symmetrically mounted on both sides of the film-pulling vacuum module; and a hot-pressing frame, connected to the movable end of the electric push blocks.

[0013] As a further improvement to the solution, it also includes: a screen curtain, which hangs down at the end of the screen frame.

[0014] As a further improvement to the solution, it also includes: a cutter, which is installed on the movable end of the electric push block near the side of the carrier plate and moves up and down with the hot press frame; the edge of the film stretching vacuum module has an opening that allows the cutter to descend and pass through.

[0015] The present invention brings the following effects:

[0016] 1. This invention utilizes an adhesive roller combined with a fluid channel formed by a triangular protrusion and a triangular limiting block to remove dust from the circuit board surface during the conveying process of the adhesive roller, thereby ensuring that the circuit board is free from dust contamination during packaging and ensuring clean packaging. The fluid channel also cleans the dust adhering to the adhesive roller, ensuring that the adhesive roller does not lose its stickiness due to excessive dust adhesion.

[0017] 2. The curved protrusion on the triangular limit block can scrape off the liquid remaining on the adhesive roller and collect it at a designated location, preventing the liquid from being transferred to the circuit board as the adhesive roller rotates.

[0018] 3. The combination of the adsorption roller, the extrusion tube, and the drainage tube can further clean any water stains that may be present on the adhesive roller, preventing water stains from contaminating the circuit board.

[0019] 4. The isolation brush plate provided in this invention not only prevents dust from entering the shielding frame, but also pre-treats the dust and impurities on the surface of the circuit board, brushing off and loosening the dust attached to the surface of the circuit board so that the adhesive roller can pick up the dust.

[0020] 5. The static eliminator is designed to eliminate static electricity on the circuit board during the circuit board transfer process.

[0021] 6. In this invention, the corner plate, the first transmission belt, the drive motor and the rotating plate work together to support the stacked circuit boards that have been cleaned of dust. The corner plate can then be used to gather, align and flatten the stacked circuit boards, ensuring that the stacked circuit boards are not skewed, so as to facilitate subsequent film coating and packaging.

[0022] 7. The present invention uses a traction transmission module, a film-pulling vacuum module and a hot-pressing frame to cooperate with each other to receive the circuit board fed from the first transmission belt and to complete the film-coating packaging of the circuit board, thereby realizing the automatic and integrated packaging work. Attached Figure Description

[0023] Figure 1 This is a complete schematic diagram of the present invention.

[0024] Figure 2 For the present invention Figure 1 A schematic diagram showing the side panel of the frame section hidden.

[0025] Figure 3 This is a schematic diagram of the mounting frame, cleaning frame, and adhesive roller of the present invention.

[0026] Figure 4 For the present invention Figure 3 The front view of the cross section of the cleaning frame.

[0027] Figure 5 For the present invention Figure 4 A schematic diagram of the extrusion tube and drainage tube of the adhesive roller is omitted.

[0028] Figure 6 This is a schematic diagram of the cutting portion of the present invention.

[0029] Figure 7 This is a schematic diagram of the carrier plate, corner plate, and first transmission belt of the present invention.

[0030] Figure 8 This is a schematic diagram of the drive motor, rotating plate, and spring of the present invention.

[0031] Figure 9 This is a schematic diagram of the telescopic push rod, the membrane vacuuming module, and the second transmission belt of the present invention.

[0032] Figure 10 For the present invention Figure 9 A diagram showing the obscuring frame and obscuring curtain.

[0033] The correspondence between the reference numerals and the names of the components in the attached drawings is as follows:

[0034] 1-Feeder, 2-Transfer roller, 3-Power output device, 4-Shielding frame, 5-Mounting frame;

[0035] 6-Cleaning frame, 61-Triangular protrusion, 62-Triangular limiting block, 63-Opening, 64-Rounded corner, 65-Curved protrusion;

[0036] 7-Adhesive roller, 706-Dryer;

[0037] 8-Adsorption roller, 9-Extrusion tube, 91-Channel hole, 10-Drain pipe, 101-Inlet;

[0038] 11-Isolation brush plate;

[0039] 12- Static Eliminator;

[0040] 13-Screw drive device, 131-Screw drive, 14-Carrier plate, 15-Angle plate, 151-Guide groove, 16-First transmission belt, 17-Drive motor, 18-Rotating plate, 19-Spring, 20-Tension spring;

[0041] 21-Second transmission belt, 211-Pull transmission module, 22-Telescopic push rod, 23-Membrane stretching vacuum module, 231-Inlet, 232-Evacuation hole, 24-Electric push block, 25-Hot press frame;

[0042] 26-Blinding curtain;

[0043] 27 - Cutting knife, 100 - Pattern. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are only for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, not all structures. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] This invention specifically discloses a cleanroom packaging machine for circuit boards, such as... Figures 1-5 As shown, it includes: a feeder 1, which is a conveyor belt, mainly for conveying samples 100 that need to be packaged. Before packaging, the samples 100 are placed one by one on the feeder 1. In order to keep the packaging process closed and dust-free, three shielding frames 4 are connected side by side to one side of the feeder 1 to ensure a relatively closed packaging environment. At the same time, multiple sets of conveying pressure rollers 2 are arranged laterally on the feeder 1 and the shielding frames 4 along the conveying direction of the feeder 1. The samples 100 are first conveyed from the feeder 1 and then clamped and conveyed into the shielding frames 4 by the conveying pressure rollers 2. The conveying pressure rollers 2 are driven by a power output device 3 installed on the outer wall of the shielding frames 4 to rotate and convey the samples 100.

[0047] An installation frame 5 is fixedly installed inside the shielding sleeve frame 4 near the side of the feeder 1. The installation frame 5 is located near the side of the conveying pressure roller 2. A cleaning frame 6 is symmetrically fixed on the installation frame 5. A triangular protrusion 61 is fixedly installed inside the cleaning frame 6. The triangular protrusion 61 has a protruding angle that is arranged downward. At the same time, triangular limiting blocks 62 are symmetrically fixedly installed on the opposite side walls on both sides inside the cleaning frame 6. A gap is left between the two triangular limiting blocks 62 and the protruding angle.

[0048] according to Figure 4As shown, the triangular limiting blocks 62 are distributed on both sides of the protruding corner of the triangular protrusion 61, leaving a certain gap to form a V-shaped cavity. The cleaning frame 6 has through-holes 63 on both sides, which are connected to the V-shaped cavity. The mounting frame 5 is symmetrically connected to the adhesive rollers 7, which are driven by the power output device 3. The sample 100 sent from the conveying pressure roller 2 is then held by the two adhesive rollers 7. As the adhesive rollers 7 rotate, they can remove the dust attached to the surface during the contact with the sample 100, thereby cleaning the dust on the surface of the circuit board and ensuring that the circuit board is not contaminated by dust during the packaging process. After the dust on the surface of the sample 100 is cleaned, it can enter the packaging stage.

[0049] The cleaning frame 6 and the triangular limiting block 62 are tightly attached to the curved surface of the adhesive roller 7. Since there is a gap between the two triangular limiting blocks 62, part of the adhesive roller 7 will be exposed in the V-shaped cavity through the gap. When water is injected into the opening 63 on one side, the water flows in along the opening 63 and then into the V-shaped cavity. The water flow entering the V-shaped cavity can clean the surface of the adhesive roller 7 exposed in the V-shaped cavity, thereby washing off the dust adhering to the adhesive roller 7. The washed-off dust is discharged from the opening 63 on the other side with the water flow, thus ensuring that the adhesive roller 7 will not lose its stickiness due to excessive dust.

[0050] In order to prevent the water flow in the V-shaped cavity from contacting the template 100 as the adhesive roller 7 rotates, according to... Figure 5 As shown, a curved protrusion 65 is provided on the apex of the triangular limiting block 62 near the feeder 1. The curved protrusion 65 contacts the adhesive roller 7 and can press down on the surface of the adhesive roller 7 to deform it, so as to keep it tightly attached and prevent the water in the V-shaped cavity from flowing to the outside as the adhesive roller 7 rotates. The apex of the lower part of the triangular limiting block 62 is an arc-shaped rounded apex 64. The rounded apex 64 can prevent the apex of the triangular limiting block 62 from being too sharp and piercing into the adhesive roller 7 during the rotation of the adhesive roller 7.

[0051] Among them, such as Figure 3 As shown, a dryer 706 is fixedly installed on the side wall of the cleaning frame 6. There are two dryers 706, which correspond to the upper and lower adhesive rollers 7 respectively. After cleaning, there may be residual water stains on the surface of the adhesive rollers 7. At this time, the dryer 706 installed on the cleaning frame 6 can blow hot air onto the surface of the adhesive rollers 7 to dry them, thereby removing the surface water stains.

[0052] The present invention uses an adhesive roller 7 in conjunction with a fluid channel formed by a triangular protrusion 61 and a triangular limiting block 62 to remove dust during the process of conveying the circuit board by the adhesive roller 7, thereby achieving the effect of dust removal on the surface of the circuit board and ensuring that the circuit board is free from dust contamination during the packaging process and ensuring clean packaging; the fluid channel also cleans the dust adhering to the adhesive roller 7, ensuring that the adhesive roller 7 does not lose its stickiness due to excessive dust.

[0053] Based on the previous specific implementation method, such as Figure 5 and Figure 6 As shown, it also includes: rotating an adsorption roller 8 mounted on a triangular limiting block 62 near the feeder 1, the adsorption roller 8 contacting the adhesive roller 7, the adsorption roller 8 being a roller made of absorbent material such as sponge or cotton cloth, the adsorption roller 8 rotating along with the adhesive roller 7 during its rotation, and through the contact between the adsorption roller 8 and the adhesive roller 7, water stains leaking from the V-shaped cavity are eventually absorbed by the adsorption roller 8 during its rotation, thus preventing water stains from remaining on the surface of the adhesive roller 7; rotating on the triangular limiting block 62 A squeezing tube 9 is provided, and the squeezing tube 9 squeezes the adsorption roller 8; a drain pipe 10 is fixedly provided on the mounting frame 5, and the drain pipe 10 passes through the squeezing tube 9. The squeezing tube 9 rotates on the drain pipe 10 due to the rotation of the adsorption roller 8, thereby squeezing out the water on the adsorption roller 8, so that the adsorption roller 8 can have a continuous water adsorption effect. Before the water stains reach the area of ​​the dryer 706, they are pre-treated by the adsorption roller 8, and most of the water stains are absorbed away. In this way, the remaining small amount of water stains can be quickly dried under the dryer 706; according to Figure 6 As shown, the extrusion tube 9 has radially perpendicular channel holes 91 evenly opened along the circumference, and the drain pipe 10 has a liquid inlet 101 at the top. When the extrusion tube 9 rotates to extrude the adsorption roller 8, the water in the adsorption roller 8 will be squeezed out and flow into the channel holes 91. The water entering the channel holes 91 will be aligned with the liquid inlet 101 of the drain pipe 10 as the extrusion tube 9 rotates. The water flows from the liquid inlet 101 into the drain pipe 10. Then, the end of the drain pipe 10 can be connected to a suction device to remove the squeezed water.

[0054] Among them, according to Figure 2 and Figure 3As shown, isolation brush plates 11 are symmetrically fixedly installed on one side of the shielding frame 4. The isolation brush plates 11 are installed on the shielding frame 4 near the feeder 1. Therefore, when the sample 100 is fed into the shielding frame 4 from the feeder 1, it needs to pass through the isolation brush plates 11 arranged vertically. The isolation brush plates 11 are equipped with bristles, which can clean the upper and lower surfaces of the sample 100. Before the adhesive roller 7 performs adhesive cleaning on the sample 100, the surface of the sample 100 is cleaned in advance to loosen any particles that may be adhered so that the adhesive roller 7 can remove the dust particles. At the same time, the isolation brush plates 11 can also prevent external dust from entering the shielding frame 4. To eliminate residual static electricity on the sample 100, static eliminators 12 are symmetrically arranged vertically within the shielding frame 4. The static eliminators 12 are located between the conveying pressure rollers 2. The static eliminators 12 consist of a high-voltage power generator and a discharge electrode. They ionize the air into a large number of positive and negative ions through high-voltage corona discharge at the tip. When the sample 100 passes through the static eliminator 12, a large number of positive and negative ions are blown onto the surface of the sample 100 by air jet to neutralize the static electricity. This method eliminates the static electricity remaining on the sample 100.

[0055] Based on the previous specific implementation method, such as Figure 2 , Figure 7 and Figure 8 As shown, it also includes: a screw drive device 13 installed in the shielding sleeve frame 4 near the mounting frame 5, the screw drive device 13 consisting of a motor driving a transmission screw 131 via a transmission belt, a carrier plate 14 connected to the transmission screw 131, and moving up and down as the transmission screw 131 rotates; four corner plates 15 symmetrically arranged on the carrier plate 14, the four corner plates 15 being slidably disposed in guide grooves 151 opened on the carrier plate 14; a first transmission belt 16 installed in the center of the carrier plate 14; a drive motor 17 fixedly installed at the bottom of the carrier plate 14; a rotating plate 18 fixedly connected to the output shaft of the drive motor 17; and a spring 19 provided in the guide groove 151, the spring 19 being used to ensure that the corner plates 15 can return to their original position after displacement. The position; the four corner plates 15 and the rotating plate 18 are connected together by four tension springs 20. The corner plates 15 are pulled by the tension springs 20 as the rotating plate 18 rotates; specifically, after the carrier plate 14 is raised to a fixed height, the sample 100 discharged by the adhesive roller 7 will fall on the carrier plate 14. As the stacking height of the sample 100 increases, the carrier plate 14 will descend accordingly. After the stacking reaches a specified number, the discharge of sample 100 will stop. The drive motor 17 will work and rotate the rotating plate 18, while pulling the corner plates 15 towards the center. The corner plates 15 and the sample 100 will come into contact, thereby gathering the sample 100 neatly. Then, the neatly arranged sample 100 will be sent to the packaging area for packaging through the first transmission belt 16.

[0056] Based on the previous specific implementation method, such as Figure 2 , Figure 9 and Figure 10 As shown, it also includes: a second transmission belt 21 disposed within the shielding frame 4, with the second transmission belt 21 near the carrier plate 14. The sample 100 delivered from the first transmission belt 16 falls onto the second transmission belt 21. A traction transmission module 211 is symmetrically fixedly installed on the second transmission belt 21 near the carrier plate 14. Before the sample 100 falls onto the second transmission belt 21, the first packaging film is first clamped on the traction transmission module 211. Therefore, as the first transmission belt 16 delivers the sample 100 to the second transmission belt 21, the sample 100 will first press the first packaging film onto the second transmission belt 21, and stretch the first packaging film as the second transmission belt 21 is driven, so that the first packaging film is located at the bottom of the sample 100. A telescopic push rod 22 is fixedly installed on the top of the shielding frame 4, and a film-pulling vacuum module is fixedly installed on the movable end of the telescopic push rod 22. 23, and the film-pulling vacuum module 23 is suspended above the second transmission belt 21. The film-pulling vacuum module 23 has an inlet 231 that allows the packaging film to enter. At this time, the second packaging film enters the film-pulling vacuum module 23 through the inlet 231. The film-pulling vacuum module 23 has a structure with the same function as the pulling transmission module 211, which is used to pull the second packaging film out. After the second packaging film is out, the film-pulling vacuum module 23 is lowered by the telescopic push rod 22 and covers the template 100 with the outstretched second packaging film. After the film-pulling vacuum module 23 is fully pressed down and adheres to the first packaging film at the bottom of the template 100, it starts to draw a vacuum through the air extraction hole 232, so that the second packaging film on the film-pulling vacuum module 23 is completely attached to the template 100. At this time, the upper and lower packaging films are adhered to each other. Electric push blocks 24 are symmetrically installed on both sides of the film-pulling vacuum module 23. A hot-press frame 25 is fixedly installed on the movable end of each electric push block 24. Therefore, when the film-pulling vacuum module 23 is vacuuming, the electric push block 24, along with the hot-press frame 25, presses down, thereby hot-pressing and bonding the second packaging film above the sample 100 and the first packaging film at the bottom together. This completes the packaging and film covering of the sample 100. After the film-pulling vacuum module 23 is pulled up by the telescopic push rod 22, it waits for the next set of samples 100 to fall onto the second transmission belt 21 for film covering. Meanwhile, at the end of the shielding frame 4... A hanging curtain 26 is provided to prevent external dust from entering the space where the second transmission belt 21 is located. When the second transmission belt 21 sends out the film-coated sample 100, the curtain 26 can be pushed open by the sample 100. A cutter 27 is fixedly installed on the movable end of the electric push block 24 near the carrier plate 14. The edge of the film pulling vacuum module 23 has an opening at the position corresponding to the cutter 27, allowing the cutter 27 to pass through. Therefore, during the pressing of the hot press frame 25, the cutter 27 descends with the hot press frame 25 and cuts the packaging film.

[0057] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A cleanroom packaging machine for circuit boards, comprising: Feeder (1); shielding frame (4), which is provided in multiples, and the multiple frames are connected side by side to one side of the feeder (1); The conveying pressure rollers (2) are arranged in multiple sets laterally according to the conveying direction of the feeder (1) and extend into the shielding frame (4); the power output device (3) is installed on the outer wall of the shielding frame (4) to drive the conveying pressure rollers (2) to rotate; characterized in that it further includes: The mounting frame (5) is installed in the shielding sleeve frame (4) near the side of the feeder (1) and near the conveying pressure roller (2); the cleaning frame (6) is symmetrically installed on both sides of the mounting frame (5); the triangular protrusion (61) is provided with a protruding angle and is installed in the cleaning frame (6); the triangular limiting block (62) is symmetrically arranged on both sides of the inner wall of the cleaning frame (6) with a gap; the triangular limiting block (62) is distributed on both sides of the protruding angle of the triangular protrusion (61) with a gap, and the cleaning frame (6) has a through opening (63) on both sides; the adhesive The adhesive roller (7) is symmetrically rotated on both sides of the mounting frame (5) and driven by the power output device (3). The cleaning frame (6) and the triangular limiting block (62) are both attached to the curved surface of the adhesive roller (7). Part of the adhesive roller (7) is exposed in the gap between the triangular limiting blocks (62) on both sides. The liquid enters through the opening (63) on one side, flows through the gap channel between the triangular limiting block (62) and the triangular protrusion (61), contacts the adhesive roller (7) exposed in the gap, and then flows out from the opening (63) on the other side.

2. The cleanroom packaging machine for circuit boards according to claim 1, characterized in that, Also includes: A curved protrusion (65) is provided on the apex of the triangular limiting block (62) near the side of the feeder (1) and is in contact with the adhesive roller (7).

3. The cleanroom packaging machine for circuit boards according to claim 1, characterized in that, Also includes: The dryer (706) is installed on the cleaning frame (6); the apex of the lower part of the triangular limiting block (62) is an arc-shaped rounded apex (64).

4. The cleanroom packaging machine for circuit boards according to any one of claims 1-3, characterized in that, Also includes: An adsorption roller (8) is rotatably mounted on the triangular limiting block (62) near the feeder (1) and in contact with the adhesive roller (7); a squeezing tube (9) is rotatably mounted on the triangular limiting block (62) and squeezes the adsorption roller (8); a drain pipe (10) is mounted on the mounting frame (5) and passes through the squeezing tube (9); the squeezing tube (9) has radially vertical channel holes (91) uniformly opened in the circumference and penetrates into the tube, and the drain pipe (10) has a liquid inlet (101) at the top.

5. The cleanroom packaging machine for circuit boards according to claim 1, characterized in that, Also includes: The isolation brush plate (11) is symmetrically installed on the shielding frame (4) on the side close to the feeder (1).

6. The cleanroom packaging machine for circuit boards according to claim 5, characterized in that, Also includes: The static eliminator (12) is arranged symmetrically in the shielding frame (4) and located between the conveying rollers (2).

7. The cleanroom packaging machine for circuit boards according to claim 6, characterized in that, Also includes: A screw drive device (13) is installed in a shielding frame (4) near the mounting frame (5); a carrier plate (14) is connected to the drive screw (131) of the screw drive device (13) for lifting and lowering; four corner plates (15) are provided and are slidably installed in the guide groove (151) opened on the carrier plate (14); a first transmission belt (16) is installed in the center on the carrier plate (14); a drive motor (17) is installed at the bottom of the carrier plate (14); a rotating plate (18) is connected to the output shaft of the drive motor (17); a spring (19) is installed in the guide groove (151); and a tension spring (20) connects each corner plate (15) to the rotating plate (18) and pulls the corner plates (15) to move as the rotating plate (18) rotates.

8. The cleanroom packaging machine for circuit boards according to claim 7, characterized in that, Also includes: The second transmission belt (21) is located inside the shielding frame (4) on the side near the carrier plate (14); the traction transmission module (211) is symmetrically installed on the second transmission belt (21) on the side near the carrier plate (14); the telescopic push rod (22) is installed on the top of the shielding frame (4); the film pulling vacuum module (23) is installed on the movable end of the telescopic push rod (22) and suspended above the second transmission belt (21); the electric push block (24) is symmetrically installed on both sides of the film pulling vacuum module (23); and the hot pressing frame (25) is connected to the movable end of the electric push block (24).

9. The cleanroom packaging machine for circuit boards according to claim 8, characterized in that, Also includes: The blind curtain (26) hangs down at the end of the blind frame (4).

10. The cleanroom packaging machine for circuit boards according to claim 9, characterized in that, Also includes: The cutter (27) is installed on the movable end of the electric push block (24) near the side of the carrier plate (14), and moves up and down with the hot press frame (25). The edge of the film stretching vacuum module (23) has an opening that allows the cutter (27) to descend and pass through.

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