A printing device for a vacuum chamber

Abstract

The application belongs to the technical field of PCB manufacturing, and particularly relates to a printing device for a vacuum chamber. When the chamber door is closed, the movement of the closed chamber door may disturb the airflow around the vacuum chamber, so that dust and fibers from the outside enter the vacuum chamber, thereby causing pollution to the PCB and affecting the printing quality. The following scheme is proposed, which comprises a printing base, a printing chamber is arranged on the printing base, two printing closing openings are arranged on the printing chamber, a deviation rectifying platform is arranged on the printing base, and the deviation rectifying platform is arranged in the printing chamber. The printing device for the vacuum chamber has the effect of improving the printing quality of the PCB. When the printing chamber is closed, the device can form a clean air curtain at the printing closing opening, so that dust and fibers in the external air are effectively prevented from falling on the PCB or the printing screen during the closing movement, thereby significantly reducing the printing defects caused by pollution and increasing the use effect of the device.

Description

Technical Field

[0001] This invention relates to the field of PCB manufacturing technology, and more particularly to a printing apparatus for a vacuum chamber. Background Technology

[0002] PCB, short for Printed Circuit Board, is a crucial basic component in the electronics industry. Through predetermined circuit design, it forms conductive copper traces on an insulating substrate to connect and support various electronic components (such as chips, resistors, capacitors, etc.) to form a complete working circuit. Almost all electronic devices rely on PCBs, hence it is often referred to as the "mother of electronic products."

[0003] PCB vacuum printing is a high-precision, high-quality process technology used to manufacture printed circuit boards. It is mainly applied to the printing of solder mask and characters. PCB vacuum printing is an advanced printing technology that eliminates the influence of air to ensure that the ink perfectly fills all the recessed areas of the PCB surface, thereby obtaining high-quality, high-reliability circuit boards.

[0004] Existing PCB vacuum chambers require a vacuum state inside during printing. However, during vacuum operation, the vacuum chamber needs to be sealed. When sealing, the movement of the closing chamber door may disturb the airflow around the vacuum chamber, allowing external dust and fibers to enter the vacuum chamber, thus contaminating the PCB and affecting printing quality. Summary of the Invention

[0005] This invention discloses a printing apparatus for a vacuum chamber, which aims to solve the technical problem in the prior art where the movement of the closed chamber door during sealing and closing may disturb the airflow around the vacuum chamber, allowing external dust and fibers to enter the vacuum chamber, thereby contaminating the PCB and affecting the printing quality.

[0006] The present invention provides a printing apparatus for a vacuum chamber, comprising:

[0007] A printing base, on which a printing chamber is provided, and the printing chamber has two printing closure openings;

[0008] The correction platform is set on the printing base and is located inside the printing chamber. PCB pressure plates are set on both sides of the correction platform.

[0009] A four-axis lifting mechanism is set on the printing base. A printing squeegee mechanism is set on the four-axis lifting mechanism. The printing squeegee mechanism is located above the correction platform and the two PCB pressure plates.

[0010] Two closed partition units are installed on the printing chamber. Each closed partition unit includes a partition air chamber and a negative pressure air chamber. An air outlet is provided on the opposite side of the partition air chamber and the negative pressure air chamber.

[0011] A printing preheating module is mounted on a printing base and includes two heating power supplies and multiple heating rods.

[0012] In a preferred embodiment, the closed partition unit further includes:

[0013] Two connecting pipes are provided on the printing chamber, and the partition air chamber is provided at one end of the two connecting pipes. An air pump is provided on each of the two connecting pipes.

[0014] Two filter element support frames are respectively disposed at the other end of two connecting pipes, and both filter element support frames are located outside the printing chamber;

[0015] Two conveying pipes are installed on the printing chamber, and the negative pressure chamber is installed at one end of the two conveying pipes. A negative pressure pump is installed on each of the two conveying pipes.

[0016] In a preferred embodiment, the closed partition unit further includes:

[0017] A flow-collecting guide frame is installed on the negative pressure gas chamber;

[0018] Two mounting brackets are provided, both of which are mounted on the partition air chamber, and both mounting brackets are provided with the same mounting shaft;

[0019] The inlet channel is located on the partition gas chamber.

[0020] In a preferred embodiment, the closed partition unit further includes:

[0021] Three fixed shafts are provided, all of which are installed on the partition air chamber. Two of the fixed shafts are equipped with guide rollers, and the other fixed shaft and the mounting shaft are equipped with adjusting rollers.

[0022] The air vent belt is set on two adjusting rollers. The air vent belt has multiple adjusting air vents. The air vent belt passes through the belt inlet channel. The outer walls of the two guide rollers are in contact with the outer walls of the air vent belt.

[0023] A general-purpose motor is mounted on one of the mounting brackets, and the output shaft of the general-purpose motor is connected to one end of the mounting shaft via a coupling.

[0024] In a preferred embodiment, the closed partition unit further includes:

[0025] The linkage wheel is located at the other end of the mounting shaft;

[0026] A transmission wheel is mounted at one end of one of the fixed shafts, and the transmission wheel and the linkage wheel are provided with the same linkage belt.

[0027] Two telescopic pipe sections are respectively set at the other end of the two conveying pipes. A filter element pressure frame is set at one end of each of the two telescopic pipe sections, and an exhaust mesh frame is set on each of the two filter element pressure frames.

[0028] In a preferred embodiment, the closed partition unit further includes:

[0029] Two air inlet pipes are respectively installed on two filter element support frames, and the two air inlet pipes are respectively connected to two connecting pipes.

[0030] Two air filters are respectively installed on two air inlet pipes and two filter support frames, and the two exhaust mesh frames are respectively in contact with the top of the two air filters;

[0031] Two fixing components are respectively set on two filter element support frames, and each of the two fixing components is equipped with an electric telescopic rod. The output ends of the two electric telescopic rods are respectively set on the two filter element pressure frames.

[0032] In a preferred embodiment, the printing blade mechanism further includes:

[0033] Two slide rail components are provided, and the two slide rail components are provided with a discharge component, and the discharge component is provided with multiple storage bins;

[0034] Two belt components are respectively mounted on two slide rail components, and two scraper bodies are also mounted on the discharge component;

[0035] The reset motor is mounted on one of the slide rail components;

[0036] Two buffer cylinders, each located on one side of one of the two slide rail components.

[0037] In a preferred embodiment, the printing preheating module further includes:

[0038] Two electric rods are mounted on a printed base, and the output ends of the two electric rods are provided with the same lower preheating plate frame.

[0039] Two telescopic air pipes are respectively installed on the lower preheating plate frame, and each of the two telescopic air pipes is provided with a connecting pipe.

[0040] In a preferred embodiment, the printing preheating module further includes:

[0041] A connecting chamber is located at one end of two connecting pipes, and an air pump body is installed on the connecting chamber.

[0042] The upper preheating plate frame is set on two telescopic air pipes and two conveying pipes, and the two heating power supplies are respectively set on the upper preheating plate frame and the lower preheating plate frame.

[0043] In a preferred embodiment, the printing preheating module further includes:

[0044] Multiple connecting heat pipes are respectively disposed on two heating power sources, and multiple heating rods are respectively disposed on the multiple connecting heat pipes;

[0045] Two electric push rods are mounted on the upper preheating plate frame, and the output ends of the two electric push rods are provided with the same partition plate frame.

[0046] As can be seen from the above, the vacuum chamber printing device provided by the present invention has the function of improving the PCB printing quality. When the printing chamber is closed, the device can form a clean air curtain at the printing closure opening, so as to effectively prevent dust and fibers in the outside air from falling on the PCB board or printing screen during the closing movement, thereby significantly reducing printing defects caused by contamination and increasing the effectiveness of the device. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the overall structure of a printing device for a vacuum chamber proposed in this invention;

[0048] Figure 2 This is a schematic diagram of the combined structure of the closed partition unit and the printing preheating module of the printing device for a vacuum chamber proposed in this invention;

[0049] Figure 3 This is a schematic diagram of the closed partition unit structure of a printing device for a vacuum chamber proposed in this invention;

[0050] Figure 4 This is a schematic diagram of the combined structure of the negative pressure air chamber and the partition air chamber of a printing device for a vacuum chamber proposed in this invention;

[0051] Figure 5 This is a schematic cross-sectional view of the partition air chamber structure of a printing device for a vacuum chamber proposed in this invention;

[0052] Figure 6 This is a schematic diagram of the combined structure of the air inlet pipe and the exhaust mesh frame of a printing device for a vacuum chamber proposed in this invention;

[0053] Figure 7 This is a schematic diagram of the combined structure of the correction platform and printing scraper mechanism of a printing device for a vacuum chamber proposed in this invention;

[0054] Figure 8 This is a schematic diagram of the printing scraper mechanism of a printing device for a vacuum chamber proposed in this invention;

[0055] Figure 9 This is a schematic diagram of the printing preheating module structure of a printing device for a vacuum chamber proposed in this invention;

[0056] Figure 10 This is a schematic diagram of the combined structure of the partition plate frame and heating rod of a printing device for a vacuum chamber proposed in this invention.

[0057] In the diagram: 1. Printing base; 2. Printing chamber; 3. Closed partition unit; 301. Filter element pressure frame; 302. Air pump; 303. Connecting pipe; 304. Conveying pipe; 305. Negative pressure pump; 306. Negative pressure chamber; 307. Partition chamber; 308. Filter element support frame; 309. Air filter; 310. Flow guide frame; 311. Air inlet; 312. Belt inlet channel; 313. Mounting bracket; 314. General motor; 315. Adjusting roller; 316. Air outlet belt; 317. Adjusting air outlet; 318. Mounting shaft; 319. Linkage wheel; 320. Linkage belt; 321. Fixed shaft; 322. Transmission wheel; 323. Guide roller; 324. Telescopic pipe section; 325. Exhaust mesh frame; 32 6. Air inlet pipe; 327. Fixing component; 328. Electric telescopic rod; 4. Printing closing port; 5. Printing preheating module; 501. Electric rod; 502. Air pump body; 503. Connecting compartment; 504. Connecting pipe; 505. Lower preheating plate frame; 506. Telescopic air pipe; 507. Upper preheating plate frame; 508. Electric push rod; 509. Divider plate frame; 510. Heating rod; 511. Heating power supply; 512. Connecting heat pipe; 6. Four-axis lifting mechanism; 7. Printing squeegee mechanism; 701. Belt component; 702. Squeegee body; 703. Storage bin; 704. Discharge component; 705. Slide rail component; 706. Reset motor; 707. Buffer cylinder; 8. PCB pressure plate; 9. Correction platform. Detailed Implementation

[0058] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0059] The vacuum chamber printing device disclosed in this invention is mainly used in scenarios where the movement of the closed chamber door may disturb the airflow around the vacuum chamber, causing external dust and fibers to enter the vacuum chamber and thus contaminating the PCB and affecting the printing quality.

[0060] Reference Figures 1-10A printing apparatus for a vacuum chamber, comprising:

[0061] A printing base 1 is provided with a printing chamber 2, and two printing closures 4 are provided on the printing chamber 2.

[0062] The correction platform 9 is set on the printing base 1 and is located inside the printing chamber 2. PCB pressure plates 8 are set on both sides of the correction platform 9.

[0063] The four-axis lifting mechanism 6 is set on the printing base 1. The four-axis lifting mechanism 6 is equipped with a printing squeegee mechanism 7, which is located above the correction platform 9 and the two PCB pressure plates 8.

[0064] Two closed partition units 3 are provided on the printing chamber 2. The closed partition unit 3 includes a partition air chamber 307 and a negative pressure air chamber 306. An air outlet 311 is provided on the opposite side of the partition air chamber 307 and the negative pressure air chamber 306.

[0065] The printing preheating module 5 is disposed on the printing base 1 and includes two heating power supplies 511 and multiple heating rods 510.

[0066] Reference Figures 1-6 In a preferred embodiment, the closed partition unit 3 further includes:

[0067] Two connecting pipes 303 are provided on the printing chamber 2. The isolation air chamber 307 is provided at one end of the two connecting pipes 303. An air pump 302 is provided on each of the two connecting pipes 303.

[0068] Two filter element support frames 308 are respectively disposed at the other end of the two connecting pipes 303, and both filter element support frames 308 are located outside the printing chamber 2;

[0069] Two conveying pipes 304 are installed on the printing chamber 2. A negative pressure air chamber 306 is installed at one end of the two conveying pipes 304. A negative pressure pump 305 is installed on each of the two conveying pipes 304.

[0070] In this invention, the closed partition unit 3 further includes:

[0071] A flow-collecting guide frame 310 is installed on the negative pressure gas chamber 306.

[0072] Two mounting brackets 313 are provided on the partition air chamber 307, and the same mounting shaft 318 is provided on the two mounting brackets 313.

[0073] The inlet channel 312 is located on the partition gas chamber 307.

[0074] In this invention, the closed partition unit 3 further includes:

[0075] Three fixed shafts 321 are provided on the partition air chamber 307. Two of the fixed shafts 321 are provided with guide rollers 323, and the other fixed shaft 321 and the mounting shaft 318 are provided with adjusting rollers 315.

[0076] Air outlet belt 316 is set on two adjusting rollers 315. Multiple adjusting air outlets 317 are opened on the air outlet belt 316. The air outlet belt 316 passes through the belt inlet channel 312. The outer walls of the two guide rollers 323 are in contact with the outer wall of the air outlet belt 316.

[0077] A general-purpose motor 314 is mounted on one of the mounting brackets 313, and the output shaft of the general-purpose motor 314 is connected to one end of the mounting shaft 318 via a coupling.

[0078] In this invention, the closed partition unit 3 further includes:

[0079] Linkage wheel 319 is located at the other end of mounting shaft 318;

[0080] A transmission wheel 322 is disposed at one end of one of the fixed shafts 321, and the transmission wheel 322 and the linkage wheel 319 are provided with the same linkage belt 320.

[0081] Two telescopic pipe sections 324 are respectively set at the other end of the two conveying pipes 304. A filter element pressure frame 301 is set at one end of each of the two telescopic pipe sections 324, and an exhaust mesh frame 325 is set on each of the two filter element pressure frames 301.

[0082] In this invention, the closed partition unit 3 further includes:

[0083] Two air inlet pipes 326 are respectively installed on two filter element support frames 308, and the two air inlet pipes 326 are respectively connected to two connecting pipes 303.

[0084] Two air filter elements 309 are respectively disposed on two air inlet pipes 326 and two filter element support frames 308, and two exhaust mesh frames 325 are respectively in contact with the top of the two air filter elements 309.

[0085] Two fasteners 327 are respectively set on two filter element support frames 308. Each of the two fasteners 327 is equipped with an electric telescopic rod 328. The output ends of the two electric telescopic rods 328 are respectively set on two filter element pressure frames 301.

[0086] Specifically, during air curtain isolation, the air pump 302 operates. The air pump 302, in conjunction with the connecting pipe 303 and the air inlet pipe 326, delivers clean air filtered by the air filter element 309 into the isolation air chamber 307. At this time, the general-purpose motor 314 operates as needed, driving the mounting shaft 318 to rotate, which in turn drives the linkage wheel 319 to rotate. The linkage wheel 319, in conjunction with the linkage belt 320 and the transmission wheel 322, causes one of the fixed shafts 321 to rotate synchronously with the mounting shaft 318, thereby causing the adjusting roller 31... 5 drives the air vent belt 316 to move, thereby moving the adjustable air vents 317 of different sizes on the air vent belt 316 to adjust the flow rate of the airflow blown out of the isolation air chamber 307. At this time, the airflow is blown out from the isolation air chamber 307 and forms a clean air curtain. Simultaneously, the negative pressure pump 305 operates, and the negative pressure pump 305 discharges the gas inside the negative pressure air chamber 306 to make its interior a negative pressure state. Then, in conjunction with the air curtain blown out by the isolation air chamber 307, it completes the blocking (the negative pressure air chamber 306 can reduce the diffusion of the air curtain when it blows to the bottom and improve the stability of the air curtain).

[0087] When replacing the air filter element 309, the electric telescopic rod 328 operates, causing the electric telescopic rod 328 to lift and lower the filter element pressure frame 301 and the exhaust screen frame 325, so that the exhaust screen frame 325 is separated from the air filter element 309. Then the air filter element 309 is removed from the intake end pipe 326 and the filter element support frame 308 and replaced. After that, the electric telescopic rod 328 drives the filter element pressure frame 301 and the exhaust screen frame 325 to reset, completing the replacement operation.

[0088] In specific application scenarios, the closed partition unit 3 is suitable for the PCB vacuum printing process. When the printing chamber 2 is closed, the closed partition unit 3 enables the partition air chamber 307 and the negative pressure air chamber 306 to cooperate with each other, thereby forming a clean air curtain at the printing closure opening 4. This clean air curtain blocks the air containing dust and fibers from the outside, effectively preventing dust and fibers in the outside air from falling onto the PCB board or printing screen during the closing motion. This significantly reduces printing defects caused by contamination and increases the printing quality of the PCB.

[0089] It should be noted that when making a partition, the device can move the air vent belt 316 as needed, thereby moving the adjustable air vents 317 of different sizes on the air vent belt 316 to adjust the flow rate of the airflow blown out of the partition air chamber 307.

[0090] Meanwhile, the device allows for convenient replacement of the air filter 309 during use, ensuring the purification effect of the air filter 309 and meeting the operational requirements of the device.

[0091] Reference Figure 7 and Figure 8 In a preferred embodiment, the printing doctor blade mechanism 7 further includes:

[0092] Two slide rail components 705, each slide rail component 705 is equipped with a discharge component 704, and the discharge component 704 is equipped with multiple storage bins 703;

[0093] Two belt components 701 are respectively mounted on two slide rail components 705, and two scraper bodies 702 are also mounted on the discharge component 704.

[0094] A reset motor 706 is mounted on one of the slide rail components 705.

[0095] Two buffer cylinders 707 are located on one side of the two slide rail components 705.

[0096] The printing squeegee mechanism 7 can be used in conjunction with the compensation function of the correction platform 9. At the same time, each squeegee body 702 also completes the inking action during printing. When two printings are required, the entire production process changes from single squeegee inking-printing-inking-printing to printing-printing, doubling the production efficiency. During squeegee printing, due to the elasticity of the mesh, the printed pattern will shift in the direction of squeegee movement. Under normal circumstances, if only the alignment is adjusted when printing from front to back, and the table is fixed, the printed pattern will inevitably deviate when printing from back to front. The pattern printed by the two squeegee bodies 702 cannot accurately coincide with the pattern on the board. Under the control of the correction platform 9, when printing from front to back, the table will move backward with the PCB board fixed on the table to ensure that the screen pattern and the PCB board pattern coincide. When printing from back to front, the table will move forward with the PCB board fixed on the table to ensure that the screen pattern and the PCB board pattern coincide. The effect of screen stretching is offset by compensation.

[0097] Reference Figure 2 , Figure 9 and Figure 10 In a preferred embodiment, the printing preheating module 5 further includes:

[0098] Two electric rods 501 are mounted on the printing base 1, and the output ends of the two electric rods 501 are provided with the same lower preheating plate frame 505.

[0099] Two telescopic air pipes 506 are respectively installed on the lower preheating plate frame 505, and each of the two telescopic air pipes 506 is provided with a connecting pipe 504.

[0100] In this invention, the printing preheating module 5 further includes:

[0101] A connecting chamber 503 is located at one end of two connecting pipes 504, and an air pump body 502 is installed on the connecting chamber 503.

[0102] The upper preheating plate frame 507 is set on two telescopic air pipes 506 and two conveying pipes 304, and two heating power supplies 511 are respectively set on the upper preheating plate frame 507 and the lower preheating plate frame 505.

[0103] In this invention, the printing preheating module 5 further includes:

[0104] Multiple heat pipes 512 are connected and respectively disposed on two heating power supplies 511, and multiple heating rods 510 are respectively disposed on the multiple heat pipes 512;

[0105] Two electric push rods 508 are mounted on the upper preheating plate frame 507, and the output ends of the two electric push rods 508 are provided with the same partition plate frame 509.

[0106] Specifically, during PCB preheating, the electric rod 501 and the air pump body 502 operate, causing the electric rod 501 to drive the lower preheating plate frame 505 to rise, thereby adjusting the height of the lower preheating plate frame 505. At the same time, the air pump body 502 inflates the connecting chamber 503 and further expands the telescopic air pipe 506 through the connecting pipe 504, thereby adjusting the distance between the upper preheating plate frame 507 and the lower preheating plate frame 505. When the PCB enters the printing chamber 2 through the feeding mechanism, the heating power supply 511 operates. The heating power supply 511 heats the heating rod 510 through the connecting heat pipe 512, thereby preheating the passing PCB until preheating is completed.

[0107] After preheating, the device is reset, and at the same time, the electric push rod 508 drives the partition plate frame 509 to move, so that the partition plate frame 509 moves between the upper and lower sets of heating rods 510 to avoid contact damage to the heating rods 510 after preheating and retraction.

[0108] In specific application scenarios, the printing preheating module 5 is suitable for the PCB printing process. When the printing preheating module 5 is used, it can preheat the PCB entering the printing chamber 2 so that the PCB has a certain suitable temperature during printing. This temperature increases the fluidity of the ink after printing. During the printing process, the ink with better fluidity can more easily fill the gaps between the PCB micro-holes, vias and fine lines, reducing voids and air pockets. At the same time, the lower surface tension allows the ink to better "wet" the PCB substrate, forming a stronger adhesion and a more uniform coating, reducing defects such as "pinholes" and further improving the printing quality of the device.

[0109] It should be noted that during printing, the electric lever 501 and the telescopic air tube 506 can adjust the overall height of the device to avoid contact and collision between the printing squeegee mechanism 7 and the device during printing.

[0110] Working principle:

[0111] When the air curtain is in operation, the air pump 302 operates. The air pump 302, in conjunction with the connecting pipe 303 and the air inlet pipe 326, delivers clean air filtered by the air filter element 309 into the partition air chamber 307. At this time, the general-purpose motor 314 operates as needed, driving the mounting shaft 318 to rotate, which in turn drives the linkage wheel 319 to rotate. The linkage wheel 319, in conjunction with the linkage belt 320 and the transmission wheel 322, causes one of the fixed shafts 321 to rotate synchronously with the mounting shaft 318, thereby causing the adjusting roller 315 to... The moving air vent belt 316 moves, causing the adjustable air vents 317 of different sizes on the air vent belt 316 to move, thereby adjusting the flow rate of the airflow blown out of the isolation air chamber 307. At this time, the airflow is blown out from the isolation air chamber 307 and forms a clean air curtain. Simultaneously, the negative pressure pump 305 operates, and the negative pressure pump 305 discharges the gas inside the negative pressure air chamber 306 to make its interior a negative pressure state. Then, in conjunction with the air curtain blown out by the isolation air chamber 307, it completes the blocking (the negative pressure air chamber 306 can reduce the diffusion of the air curtain when it blows to the bottom and improve the stability of the air curtain).

[0112] When replacing the air filter element 309, the electric telescopic rod 328 operates, causing the electric telescopic rod 328 to lift and lower the filter element pressure frame 301 and the exhaust screen frame 325, so that the exhaust screen frame 325 is separated from the air filter element 309. Then the air filter element 309 is removed from the intake end pipe 326 and the filter element support frame 308 and replaced. After that, the electric telescopic rod 328 drives the filter element pressure frame 301 and the exhaust screen frame 325 to reset, completing the replacement operation.

[0113] During PCB preheating, the electric rod 501 and the air pump body 502 operate, causing the electric rod 501 to drive the lower preheating plate frame 505 to rise, thereby adjusting the height of the lower preheating plate frame 505. At the same time, the air pump body 502 inflates the connecting chamber 503 and further expands the telescopic air pipe 506 through the connecting pipe 504, thereby adjusting the distance between the upper preheating plate frame 507 and the lower preheating plate frame 505. When the PCB enters the printing chamber 2 through the feeding mechanism, the heating power supply 511 operates. The heating power supply 511 heats the heating rod 510 through the connecting heat pipe 512, thereby preheating the passing PCB until preheating is completed.

[0114] After preheating, the device is reset, and at the same time, the electric push rod 508 drives the partition plate frame 509 to move, so that the partition plate frame 509 moves between the upper and lower sets of heating rods 510 to avoid contact damage to the heating rods 510 after preheating and retraction.

[0115] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A printing apparatus for a vacuum chamber, characterized in that, include: A printing base (1) is provided with a printing chamber (2), and two printing closures (4) are opened on the printing chamber (2). The correction platform (9) is set on the printing base (1). The correction platform (9) is located inside the printing chamber (2). PCB pressure plates (8) are set on both sides of the correction platform (9). The four-axis lifting mechanism (6) is set on the printing base (1). The four-axis lifting mechanism (6) is equipped with a printing squeegee mechanism (7). The printing squeegee mechanism (7) is located above the correction platform (9) and the two PCB pressure plates (8). Two closed partition units (3) are provided on the printing chamber (2). The closed partition unit (3) includes a partition air chamber (307) and a negative pressure air chamber (306). An air outlet (311) is provided on the opposite side of the partition air chamber (307) and the negative pressure air chamber (306). Printing preheating module (5) is disposed on printing base (1). The printing preheating module (5) includes two heating power supplies (511) and multiple heating rods (510). The closed partition unit (3) also includes: Two connecting pipes (303) are provided on the printing chamber (2), and the isolation air chamber (307) is provided at one end of the two connecting pipes (303). An air pump (302) is provided on each of the two connecting pipes (303). Two filter element carrier frames (308) are respectively disposed at the other end of two connecting pipes (303), and both filter element carrier frames (308) are located outside the printing chamber (2); Two conveying pipes (304) are provided on the printing chamber (2), and the negative pressure chamber (306) is provided at one end of the two conveying pipes (304). A negative pressure pump (305) is provided on each of the two conveying pipes (304). A flow-receiving guide frame (310) is installed on the negative pressure gas chamber (306); Two mounting brackets (313) are provided on the partition air chamber (307), and the two mounting brackets (313) are provided with the same mounting shaft (318). An inlet channel (312) is provided on the partition gas chamber (307); Three fixed shafts (321) are provided on the partition air chamber (307). Two of the fixed shafts (321) are provided with guide rollers (323), and the other fixed shaft (321) and the mounting shaft (318) are provided with adjusting rollers (315). Air vent belt (316) is set on two adjusting rollers (315). Multiple adjusting air vents (317) are opened on the air vent belt (316). The air vent belt (316) passes through the belt inlet channel (312). The outer walls of the two guide rollers (323) are in contact with the outer wall of the air vent belt (316). Two telescopic pipe sections (324) are respectively set at the other end of two conveying pipes (304). A filter element pressure frame (301) is provided at one end of each of the two telescopic pipe sections (324), and an exhaust mesh frame (325) is provided on each of the two filter element pressure frames (301). Two air inlet pipes (326) are respectively disposed on two filter element support frames (308), and the two air inlet pipes (326) are respectively connected to two connecting pipes (303); Two air filters (309) are respectively disposed on two air inlet pipes (326) and two filter support frames (308), and the two exhaust mesh frames (325) are respectively in contact with the top of the two air filters (309); Two fasteners (327) are respectively set on two filter element support frames (308), and each of the two fasteners (327) is provided with an electric telescopic rod (328). The output ends of the two electric telescopic rods (328) are respectively set on two filter element pressure frames (301).

2. The printing apparatus for a vacuum chamber according to claim 1, characterized in that, The closed partition unit (3) also includes: A general-purpose motor (314) is mounted on one of the mounting brackets (313), and the output shaft of the general-purpose motor (314) is connected to one end of the mounting shaft (318) via a coupling; Linkage wheel (319), the linkage wheel (319) is located at the other end of the mounting shaft (318); The transmission wheel (322) is located at one end of one of the fixed shafts (321), and the transmission wheel (322) and the linkage wheel (319) are provided with the same linkage belt (320).

3. The printing apparatus for a vacuum chamber according to claim 1, characterized in that, The printing scraper mechanism (7) includes: Two slide rail components (705) are provided with a discharge component (704), and the discharge component (704) is provided with a plurality of storage bins (703). Two belt components (701) are respectively mounted on two slide rail components (705), and two scraper bodies (702) are also mounted on the discharge component (704). A reset motor (706) is mounted on one of the slide rail components (705); Two buffer cylinders (707) are located on one side of the two slide rail components (705).

4. The printing apparatus for a vacuum chamber according to claim 1, characterized in that, The printing preheating module (5) also includes: Two electric rods (501) are provided on the printing base (1), and the output ends of the two electric rods (501) are provided with the same lower preheating plate frame (505). Two telescopic air pipes (506) are respectively installed on the lower preheating plate frame (505), and each of the two telescopic air pipes (506) is provided with a connecting pipe (504).

5. A printing apparatus for a vacuum chamber according to claim 4, characterized in that, The printing preheating module (5) also includes: A connecting chamber (503) is provided at one end of two connecting pipes (504), and an air pump body (502) is provided on the connecting chamber (503). The upper preheating plate frame (507) is set on two telescopic air pipes (506) and two conveying pipes (304), and the two heating power supplies (511) are respectively set on the upper preheating plate frame (507) and the lower preheating plate frame (505).

6. The printing apparatus for a vacuum chamber according to claim 5, characterized in that, The printing preheating module (5) also includes: Multiple connecting heat pipes (512) are respectively disposed on two heating power sources (511), and multiple heating rods (510) are respectively disposed on multiple connecting heat pipes (512); Two electric push rods (508) are mounted on the upper preheating plate frame (507), and the output ends of the two electric push rods (508) are provided with the same partition plate frame (509).

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