Double-chamber vacuum printing device and method

Abstract

The present invention discloses a double-bin vacuum printing device and method. The device includes a printing bin and a pick-and-place bin, wherein a printing mechanism is arranged in the printing bin, and is characterized in that the printing bin includes a main bin, an extension bin connected to the main bin is arranged on one side of the main bin, the pick-and-place bin is arranged above the extension bin, an opening is arranged between the pick-and-place bin and the extension bin, a pick-and-place port is arranged on the pick-and-place bin, and a cover plate assembly is arranged on the pick-and-place port; the double-bin vacuum printing device also includes at least two workbenches that can be moved alternately between the main bin and the extension bin, and when the workbenches are located in the extension bin, the workbenches block the opening between the pick-and-place bin and the extension bin and form a seal. The present invention greatly improves work efficiency and quality, and saves a lot of energy.

Description

Technical Field

[0001] The present invention relates to the field of PCB (printed circuit board) and semiconductor chip production, and in particular to a double-chamber vacuum printing device and method. Background Art

[0002] There are many holes on the surface of the carrier board of PCB and semiconductor chip, and the holes on the surface need to be filled with resin to make the surface smooth. In the prior art, vacuum plugging printers are often used to plug the holes. In order to make the through holes or blind holes on the PCB or chip fully and evenly filled, the PCB or chip needs to be placed in a vacuum environment so that there is basically no air obstruction in the holes to be filled, and then the ink is squeezed into the holes through the screen by a scraper. In order to achieve this purpose, the printer is usually set in a closed container, the door of the container is opened during operation, and the workbench with the printed circuit board installed is moved into the container. After closing the container door, the air in the container is evacuated by a vacuum pump to reach the set vacuum degree before printing. After printing is completed, the door is opened again, the processed printed circuit board is taken out, and the next printing is carried out. This method requires evacuating and breaking the vacuum of the entire closed air container for each printing, which is very inefficient and wastes a lot of energy.

[0003] At present, the more advanced practice is to divide the entire printing device into two areas, namely, a printing chamber and a pick-and-place chamber, so that the printing action is realized in the printing chamber, and the pick-and-place action is realized in the pick-and-place chamber. For example, the Chinese invention patent application with the publication number CN1432469A discloses a vacuum printing device, which has a shell with a sealed door on the top plate and defines a sealed internal space, a printer arranged in the sealed internal space, a movable workpiece workbench arranged in the sealed internal space to provide workpieces such as printed wiring circuit boards to the printer, and an exhaust device connected to the sealed internal space; the workpiece workbench is movable between a closed position in which the sealed internal space is sealed into a first compartment (i.e., the pick-and-place chamber) having the sealed door and a second compartment (i.e., the printing chamber) containing the printer and connected to the exhaust device, and a workpiece supply position in which the workpiece is provided to the printer; when the workpiece workbench is in the closed position, the sealed door can be opened when the workpiece is taken out and placed.

[0004] Although the above scheme has improved the original process, the efficiency and quality have been improved. However, the above-mentioned double-chamber vacuum printing device, because when the printing table carrying the PCB or chip is working in the printing chamber, the scraper moves horizontally to squeeze the ink through the screen into the holes of the PCB or chip. This action takes a long time, generally 20 seconds to 38 seconds. After the plugging action is completed, the printing table moves horizontally back to the loading and unloading chamber area, the vacuum in the loading and unloading chamber is broken, and the loading and unloading chamber door is opened to take out the processed workpiece and put in the next workpiece to be processed, and enter the next cycle. In this way, the printer is in a waiting state while the scraper moves horizontally to squeeze the ink through the screen into the holes of the PCB or chip. That is to say, in the prior art, the printing operation and the loading and unloading operation need to be completed one before the other can be performed. This results in the current single-piece processing time taking more than 60 seconds, which seriously affects efficiency. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a double-chamber vacuum printing device and method which can greatly improve the working efficiency.

[0006] In order to solve the above technical problems, the present invention provides a dual-chamber vacuum printing device, including a printing chamber and a pick-and-place chamber, a printing mechanism is arranged in the printing chamber, the printing chamber includes a main chamber, an extension chamber connected to the main chamber is arranged on one side of the main chamber, the pick-and-place chamber is arranged above the extension chamber, an opening is arranged between the pick-and-place chamber and the extension chamber, a pick-and-place port is arranged on the pick-and-place chamber, and a cover plate assembly is arranged on the pick-and-place port; the dual-chamber vacuum printing device also includes at least two workbenches that can be alternately moved between the main chamber and the extension chamber, and when the workbenches are located in the extension chamber, the workbenches block the opening between the pick-and-place chamber and the extension chamber and form a seal.

[0007] Furthermore, a circular isolation frame that can be raised and lowered under the first driving device is also provided at the opening between the pick-and-place bin and the extension bin. When the circular isolation frame is located at the lower position of the lifting stroke, it contacts the outer shell and the workbench of the pick-and-place bin respectively, thereby sealing the opening between the pick-and-place bin and the extension bin.

[0008] Furthermore, a guide structure is provided between the circular isolation frame and the pick-and-place bin shell.

[0009] Furthermore, the workbench is located at the same height when it is located in the extension warehouse.

[0010] Furthermore, the workbench is located at different heights when located in the main warehouse.

[0011] Furthermore, the first workbench of the two workbenches moves horizontally between the main bin and the extension bin, and the second workbench rises to the same height as the first workbench during the movement from the main bin to the extension bin.

[0012] Furthermore, a linear push rod is provided at the bottom of the second workbench, and a moving cam is provided on the path of the second workbench moving from the main bin to the extension bin. After the linear push rod contacts the moving cam, the moving cam pushes the linear push rod and drives the second workbench to rise to the same height as the first workbench.

[0013] Furthermore, there are two groups of linear push rods, each group includes two linear push rods, one group of linear push rods is arranged at the bottom of the second workbench on the side facing the extension warehouse, and the other group is arranged at the bottom of the second workbench on the side facing the main warehouse, and the distance between the two linear push rods in one group is greater than the distance between the two linear push rods in the other group; there are also two groups of movable cams, each group includes two movable cams, and the distance between the two groups of movable cams corresponds to the distance between the two groups of linear push rods.

[0014] Furthermore, the linear push rod is a cam follower, and the movable cam is a planar cam.

[0015] Furthermore, the second workbench includes a workbench plate, a guide member is arranged below the workbench plate, and the linear push rod is arranged at the bottom end of the guide member; a guide plate which can move relative to the guide member is sleeved on the guide member, and the guide plate moves horizontally between the main bin and the extension bin; wherein the guide member is a guide shaft or a guide rail.

[0016] Furthermore, the guide plate is also provided with a guide sleeve arranged on the outside of the guide rail or a sliding block cooperating with the guide rail.

[0017] Furthermore, translation linear sliders are arranged on both sides of the guide plate.

[0018] Furthermore, the printing mechanism is arranged on a lifting mechanism, and the lifting mechanism is configured to enable the printing mechanism to stay in at least two positions, each position corresponding to a height when the workbench is located at the main warehouse position.

[0019] Furthermore, the cover plate assembly includes a cover plate and a support plate that can move horizontally under the drive of a second drive device, and a cover plate lifting guide column is provided on the support plate, and the cover plate is sleeved on the cover plate lifting guide column; the cover plate assembly also includes a third drive device for driving the cover plate to lift.

[0020] Furthermore, a cover plate lifting guide sleeve is connected and fixed to the cover plate, and the cover plate lifting guide sleeve is sleeved on the cover plate lifting guide column.

[0021] The present invention also provides a vacuum printing method for a dual-chamber vacuum printing device, the dual-chamber vacuum printing device comprising a printing chamber and a pick-and-place chamber, the printing chamber comprising a main chamber and an extension chamber disposed on one side of the main chamber and connected to the main chamber, the pick-and-place chamber being disposed above the extension chamber, the vacuum printing method comprising:

[0022] Providing at least two workbenches, wherein one workbench is located in the extension chamber and seals and isolates the pick-and-place chamber from the printing chamber, and the other workbench is located in the printing chamber;

[0023] Open the pick-and-place bin, place or replace the workpiece on the workbench, close the pick-and-place bin, and evacuate the pick-and-place bin; and use the printing mechanism to print and fill the workpiece on the workbench in the printing bin;

[0024] Move the two workbenches so that one of them moves from the extension bin to the main bin and the other moves from the main bin to the extension bin, and return to the previous step; wherein, in the process of moving the workbenches, one of the workbenches moves horizontally, and the moving path of the other workbenches has a height difference, and the positions of the two workbenches in the extension bin are at the same height.

[0025] Furthermore, the dual-chamber vacuum printing device further includes a liftable circular isolation frame arranged at the opening between the pick-and-place chamber and the extension chamber, wherein:

[0026] When the workbench is located in the extension bin, the circular isolation frame descends and together with the workbench seals and isolates the pick-and-place bin from the printing bin;

[0027] After the pick-and-place bin is evacuated, the circular isolation frame rises to release the sealed isolation between the pick-and-place bin and the printing bin.

[0028] The dual-chamber vacuum printing device and method of the present invention provide at least two workbenches. When the PCB or chip on one of the workbenches is being filled at the printing mechanism of the printing chamber, the other workbench can be moved to the pick-and-place chamber to pick and place materials, thereby greatly improving work efficiency and quality. In addition, the structural design of the present invention makes the space of the pick-and-place chamber very small, so it only takes a very short time to complete the vacuuming and breaking of the vacuum, further improving work efficiency and saving a lot of energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a double-chamber vacuum printing device of the present invention.

[0030] Figure 2 for Figure 1 A side cross-sectional view of the illustrated embodiment.

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of an embodiment of the second workbench in the present invention.

[0032] Figure 4 for Figure 3 A side view of the illustrated embodiment of the workbench.

[0033] Figure 5 for Figure 3 Schematic diagram of the motion principle of the workbench embodiment shown.

[0034] Figure 6 It is a schematic diagram of the three-dimensional structure of an embodiment of a pick-and-place bin in the present invention.

[0035] Figure 7 for Figure 6 A partial enlarged view of the illustrated embodiment.

[0036] Figure 8 It is a partial cross-sectional view of an embodiment of the circular isolation frame in the present invention.

[0037] Figure 9-Figure 15 The figure is a schematic diagram of the working process of an embodiment of a double-chamber vacuum printing device of the present invention.

[0038] 1. Printing chamber, 2. Valve, 3. Vacuum pump, 4. Pipeline, 5. Printing mechanism, 6. Scraper, 7. Screen, 8. Lower platen guide rail, 9. Upper platen guide rail, 10. First workbench, 11. Second workbench, 11-1. Workbench plate, 11-2. Guide shaft, 11-3. Cam follower, 11-4. Lower fixed plate, 11-5. Guide plate, 11-6. Guide sleeve, 11-7. Translation linear slider, 12. Lower transmission device, 13. Upper transmission device, 14. Pick-and-place chamber, 14-1. Ring-shaped isolation frame, 14-2 , cover plate, 14-3, second drive device, 14-4, cover plate translation guide rail, 14-5, pick-and-place bin shell, 14-6, isolation frame lifting guide column, 14-7, isolation frame lifting guide sleeve, 14-8, first drive device, 14-9, cover plate lifting guide column, 14-10, cover plate lifting guide sleeve, 14-11, third drive device, 14-12, support plate, 14-13, sealing strip, 15, plane cam, 16, frame, 17, workpiece, 100, pick-and-place bin space, 200, main bin, 300, extension bin. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings and specific embodiments are only intended to help those skilled in the art understand the present invention, and are exemplary rather than restrictive. Any structural, methodological or functional improvements or changes made by those of ordinary skill in the art based on the accompanying drawings and the following specific embodiments shall fall within the scope of protection of the present invention.

[0040] In the present invention, unless otherwise clearly stated and limited, the terms "connected", "connection", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral molding, and the connection method is not limited, it can be connected by bolts, rivets, welding, etc., it can be directly connected, or it can be indirectly connected by other mechanisms well known to ordinary technicians in the field. Ordinary technicians in the field can understand the specific meanings of the above or other similar terms in the present invention according to specific circumstances.

[0041] In the present invention, unless otherwise clearly described and limited, the term "including" should be understood as open-ended, that is, including but not limited to.

[0042] like Figure 1 and Figure 2 As shown, an embodiment of the double-chamber vacuum printing device of the present invention comprises a printing chamber 1 and a pick-and-place chamber 14, the printing chamber 1 and the pick-and-place chamber 14 are integrally arranged on a frame 16, a printing mechanism 5 is arranged in the printing chamber 1, the printing chamber 1 comprises a main chamber 200, an extension chamber 300 is arranged on one side of the main chamber, and the extension chamber 300 is connected to the main chamber 200. Usually, the extension chamber 300 and the main chamber 200 are arranged as an integral structure, which can achieve better sealing. Of course, the extension chamber 300 and the main chamber 200 can also be made separately and then sealed and connected together. The pick-and-place chamber 14 is arranged above the extension chamber 200, an opening is arranged between the pick-and-place chamber 14 and the extension chamber 300, a pick-and-place port is arranged on the pick-and-place chamber 14, and a cover plate assembly is arranged on the pick-and-place port. The double-chamber vacuum printing device of the present invention also comprises two workbenches that can be alternately moved between the main chamber 200 and the extension chamber 300, and when the workbenches are located in the extension chamber 300, the workbenches block the opening between the pick-and-place chamber 14 and the extension chamber 300 and form a seal. A vacuum source (e.g., a vacuum pump 3) is connected to the printing chamber 1 and the pick-and-place chamber 14 through a pipe 4, and the air passage between the vacuum source and the printing chamber 1 and the pick-and-place chamber 14 is controlled by a valve 2, thereby evacuating or breaking the vacuum in the printing chamber 1 and / or the pick-and-place chamber 14 (i.e., filling the printing chamber and / or the pick-and-place chamber with air to make it the same as the external atmospheric pressure).

[0043] In this embodiment, two workbenches are provided, and the two workbenches move alternately between the main bin 200 and the extension bin 300 of the printing bin 1. When one of the workbenches is located in the main bin 200, the printing mechanism 5 performs a filling operation on the workpiece 17 (including but not limited to PCB boards and chips, etc.) on the workbench, while the other workbench is located in the extension bin 300 to perform a pick-and-place operation, and the two exchange positions after completion. The present invention makes full use of the waiting time of the printing mechanism filling process to complete the workpiece replacement work, thereby greatly improving the work efficiency.

[0044] In addition, the structure of this embodiment can design the pick-and-place bin space 100 to be very small, as long as it can accommodate the PCB or chip and its carrier board. Therefore, when evacuating or breaking the vacuum in the pick-and-place bin, it only takes a very short time to complete, which greatly improves efficiency and saves energy.

[0045] In order to realize that the two workbenches can move alternately between the main compartment 200 and the extension compartment 300, a preferred solution is that the two workbenches are located at the same height when they are located in the extension compartment 300, and at different heights when they are located in the main compartment 200. In this way, the two workbenches will not interfere with each other when they move alternately between the main compartment 200 and the extension compartment 300. For example, Figure 2 As shown, the first workbench 10 of the two workbenches moves horizontally between the main warehouse 200 and the extension warehouse 300, and the second workbench 11 will drop a certain height when moving from the extension warehouse 300 to the main warehouse 200. Accordingly, the second workbench 11 will be raised to the same height as the first workbench 10 when moving from the main warehouse 200 to the extension warehouse 300. Of course, in other embodiments, the first workbench 10 and the second workbench 11 may also be located at the same height when they are located in the main warehouse 200.

[0046] In order to realize the lifting of the second workbench 11 during the movement from the main warehouse 200 to the extension warehouse 300, a direct-acting push rod is arranged at the bottom of the second workbench 11, and a moving cam is arranged on the travel path of the second workbench 11 moving from the main warehouse to the extension warehouse. In the process of the second workbench 11 moving from the main warehouse to the extension warehouse, when the direct-acting push rod contacts the moving cam, the moving cam pushes the direct-acting push rod and drives the second workbench to rise to the same height as the first workbench.

[0047] like Figure 2As shown, in this embodiment, the linear push rod adopts a cam follower 11-3, and the moving cam adopts a plane cam 15 set on the frame 14. Since the cam follower is easy to purchase, and the plane cam 15 has a simple structure and is easy to manufacture, the cost of using the cam follower and the plane cam is very low. In other embodiments, the linear push rod can adopt a slider or other structures, and the moving cam can also adopt an arc shape, etc., as long as it can achieve the purpose of lifting the second workbench 11 by cooperating with the slider. Of course, in other embodiments, a solution of lifting the second workbench by a structure such as a cylinder during the horizontal movement of the second workbench can also be adopted.

[0048] In addition, the second workbench may be first moved horizontally to the extension bin, and then a lifting mechanism (such as a hydraulic mechanism, a screw rod, etc.) may be used to lift the second workbench to the same height as the first workbench.

[0049] like Figure 3-Figure 5 As shown, as a preferred embodiment, there are two groups of cam followers as linear push rods, each group includes two cam followers 11-3, one group of cam followers is set at the bottom of the side of the second workbench 11 facing the extension bin 300, and the other group is set at the bottom of the side of the second workbench 11 facing the main bin 200, and the distance between the two cam followers in one group is greater than the distance between the two cam followers in the other group; there are also two groups of plane cams as moving cams, each group includes two plane cams 15, and the distance between the two groups of plane cams 15 corresponds to the distance between the two groups of cam followers 11-3. That is, in this embodiment, the width between the front and rear groups of cam followers is different, and with the corresponding plane cams, the front and rear groups of cam followers 11-3 can be lifted at the same time, so that the second workbench 11 is kept horizontal during the lifting process.

[0050] like Figure 3 and Figure 4 In the embodiment shown, the second workbench 11 includes a workbench plate 11-1, a guide shaft 11-2 as a guide member is arranged below the workbench plate 11-1, and a linear push rod is arranged at the bottom end of the guide shaft 11-2; a guide plate 11-5 is sleeved on the guide shaft 11-2, and the guide shaft 11-2 can slide up and down relative to the guide plate 11-5. Figure 5As shown, during operation, when the second workbench 11 moves from the main bin 200 to the extension bin 300, the guide plate 11-5 moves horizontally between the main bin and the extension bin along the lower platen guide rail 8. In the initial stage, the guide shaft 11-2 and the second workbench 11 move horizontally along the guide plate 11-5. When the cam follower 11-3 at the bottom of the guide shaft 11-2 contacts the plane cam 15, due to the lateral limiting effect of the guide plate 11-5, the guide plate 11-5 drives the second workbench 11 to continue to move toward the extension bin. At this time, due to the effect of the plane cam 15, the cam follower 11-3 moves horizontally while climbing upward along the plane cam 15, and at the same time drives the guide shaft 11-2 and the workbench plate 11-1 to be lifted upward. Finally, when the cam follower 11-3 moves to the top of the plane cam 15, the workbench plate 11-1 of the second workbench 11 is also lifted to the same height as the first workbench 10.

[0051] Preferably, a guide sleeve 11-6 is also provided on the guide plate 11-5, and the guide sleeve 11-6 is sleeved on the outside of the guide shaft 11-2. By providing the guide sleeve, the guide contact area is increased, thereby achieving better guidance.

[0052] In other embodiments, a guide rail may be used as a guide member, and a slider extending upward and / or downward may be provided on the guide plate. Through the cooperation of the slider and the guide rail, the guide contact area may be increased to achieve better guidance.

[0053] Translation linear sliders 11-7 are also provided on both sides of the guide plate 11-5, and the translation linear sliders 11-7 can ensure that the guide plate 11-5 moves smoothly in the lateral direction.

[0054] Since different workbenches in the embodiment of the present invention are at different heights in the main warehouse 200, in order to complete printing on the workpieces 17 on different workbenches, the printing mechanism 5 can be set on a lifting mechanism, and the lifting mechanism is configured to allow the printing mechanism 5 to stay in at least two positions, each position corresponding to the height of a workbench when it is located at the main warehouse position. Of course, the lifting mechanism can also be designed so that the number of positions where the printing mechanism 5 can stay is greater than the number of workbenches, for example, the printing mechanism 5 can also stay in an "unloaded" position that is higher than any workbench. The existence of this "unloaded" position can avoid the danger of the workbench colliding with the screen 7 on the printing mechanism 5 due to the accidental change of the position of the workpiece 17 or other tools on the workbench when the workbench is moving.

[0055] like Figures 6 to 8In the embodiment shown, the opening between the pick-and-place bin 14 and the extension bin 300 of the present invention is further provided with a circular isolation frame 14-1 that can be raised and lowered under the first driving device 14-8. When the circular isolation frame 14-1 is located at the lower position of the lifting stroke, it contacts the pick-and-place bin housing 14-5 and the workbench respectively to seal the opening between the pick-and-place bin 14 and the extension bin 300. By providing the circular isolation frame 14-1, better sealing can be achieved.

[0056] Preferably, a guide structure can also be provided between the circular isolation frame 14-1 and the pick-and-place bin housing 14-5. The guide structure comprises an isolation frame lifting guide post 14-6 and an isolation frame lifting guide sleeve 14-7, wherein the isolation frame lifting guide sleeve 14-7 is sleeved on the isolation frame lifting guide post 14-6, wherein one of the isolation frame lifting guide post 14-6 and the isolation frame lifting guide sleeve 14-7 is provided on the pick-and-place bin housing 14-5, and the other is provided on the circular isolation frame 14-1. The guide structure can ensure the stability of the circular isolation frame 14-1 when lifting. Of course, a special isolation frame lifting guide sleeve can also be not provided, but directly drilling holes on the circular isolation frame 14-1 or the pick-and-place bin housing 14-5 can also play a guiding role.

[0057] like Figure 6 and Figure 8 As shown, in one embodiment of the present invention, the cover assembly includes a cover 14-2 and a support plate 14-12 that can move horizontally along the cover translation guide rail 14-4 under the drive of the second drive device 14-3, and a cover lifting guide column 14-9 is arranged on the support plate 14-12, and the cover 14-2 is sleeved on the cover lifting guide column 14-9; the cover assembly also includes a third drive device 14-11 for driving the cover 14-2 to rise and fall. The third drive device 14-11 drives the cover 14-2 to rise and fall. When the cover 14-2 descends to the bottom of the stroke, the cover 14-2, the pick-and-place bin housing 14-5, the round-shaped isolation frame 14-1 and the workbench form a pick-and-place bin space 100. When the third drive device 14-11 drives the cover 14-2 to rise to the upper part of the stroke, the second drive device 14-3 can drive the support plate 14-12 to drive the cover 14-2 to slide to one side, thereby opening the pick-and-place opening of the pick-and-place bin 14. After the workpiece 17 is placed, the sealing of the placement bin 14 is completed again through the reverse workflow. In order to achieve better guidance, a cover plate lifting guide sleeve 14-10 can be connected and fixed to the cover plate 14-2, and the cover plate lifting guide sleeve 14-10 is sleeved on the cover plate lifting guide column 14-9. Each driving device in the present invention can be a driving device such as a cylinder, a hydraulic cylinder or a motor.

[0058] In order to achieve better sealing, sealing pads or sealing strips 14-13 can be set on the contact surfaces between the circular isolation frame 14-1 and the workbench and the pick-and-place bin shell 14-5, and between the cover plate 14-2 and the support plate 14-12 and the pick-and-place bin shell 14-5.

[0059] An embodiment of a vacuum printing method of a dual-chamber vacuum printing device provided by the present invention, wherein the dual-chamber vacuum printing device comprises a printing chamber and a pick-and-place chamber, the printing chamber comprises a main chamber and an extension chamber disposed on one side of the main chamber and connected to the main chamber, the pick-and-place chamber is disposed above the extension chamber, and the vacuum printing method of this embodiment comprises:

[0060] Providing at least two workbenches, one of which is located in the extension chamber and seals and isolates the pick-and-place chamber from the printing chamber, and the other workbench is located in the printing chamber;

[0061] Open the pick-and-place bin, place or replace the workpiece on the workbench, close the pick-and-place bin, and evacuate the pick-and-place bin; at the same time, use the printing mechanism to print and fill the workpiece on the workbench in the printing bin;

[0062] Move the two workbenches so that one of them is moved from the extension bin to the main bin and the other is moved from the main bin to the extension bin, and return to the previous step.

[0063] In the process of moving the workbenches, one of the workbenches moves horizontally, and the moving path of the other workbenches has a height difference, that is, the other workbenches will drop a certain height when moving from the extension warehouse to the main warehouse to avoid collision with the first workbench; and the other workbench will be raised a certain height when moving from the main warehouse to the extension warehouse, so that the two workbenches are at the same height in the extension warehouse.

[0064] In addition, the double-chamber vacuum printing device may further include a liftable circular isolation frame arranged at the opening between the pick-up and drop-down chamber and the extension chamber, wherein:

[0065] When the workbench is located in the extension bin, the circular isolation frame descends and together with the workbench seals and isolates the pick-and-place bin from the printing bin;

[0066] After the job is changed and the pick-and-place bin is evacuated, the circular isolation frame rises to release the sealed isolation between the pick-and-place bin and the printing bin.

[0067] Specifically, Figures 9 to 15 As shown, the working process of the double-chamber vacuum printing device of the embodiment of the present invention is as follows:

[0068] First, if Fig. 9As shown, the first workbench (or the second workbench) is moved along the upper table rail 9 to the extension bin, the first drive device 14-8 drives the circular isolation frame 14-1 to descend and contact with the first workbench 10 to form a seal, connect the passage between the printing bin 1 and the vacuum source, and evacuate the printing bin 1. When the vacuum degree of the printing bin 1 reaches a preset value, the passage between the printing bin 1 and the vacuum source is closed. At the same time or afterwards, the third drive device 14-11 drives the cover plate 14-2 to rise to the upper part of the stroke, and then the second drive device 14-3 drives the support plate 14-12 to drive the cover plate 14-2 to slide to one side, thereby opening the access opening of the bin 14, and then the workpiece 17 is placed on the first workbench 10. The second driving device 14-3 drives the support plate 14-12 to slide the cover plate 14-2 back to the original position, and then the third driving device 14-11 drives the cover plate 14-2 to descend to the bottom of the stroke, and the cover plate 14-2 contacts the pick-and-place bin housing 14-5, and forms a sealed pick-and-place bin space 100 with the circular isolation frame 14-1 and the first workbench 10. The passage between the pick-and-place bin 14 and the vacuum source is connected, and the pick-and-place bin 14 is vacuumed. When there is no pressure difference between the pick-and-place bin 14 and the printing bin 1 or the pressure difference is less than a preset value, the passage between the pick-and-place bin 14 and the vacuum source is closed.

[0069] Then, if Fig.10 As shown, the first driving device 14-8 drives the circular isolation frame 14-1 to rise, and the first workbench 10 and the second workbench 11 exchange positions, that is, the first workbench 10 is driven to move toward the main warehouse 200, and the second workbench 11 is driven to move toward the extension warehouse 300. When the cam follower 11-3 at the bottom of the second workbench 11 contacts the plane cam 15, as shown in FIG. Fig.11 As shown, under the push of the planar cam 15, the second workbench 11 is lifted upward and finally lifted to the same height as the first workbench 10. Since there is a height difference between the first workbench 10 and the second workbench 11 on most paths, the first workbench 11 and the second workbench 12 will not collide or interfere with each other, and the position exchange can be completed smoothly. After the first workbench 10 moves to the predetermined position of the main warehouse 200, the lifting device installed at the lower end of the printing mechanism 5 lowers the printing mechanism 5 to the height of the first workbench 10, and the workpiece 17 on the first workbench 10 is filled by the scraper 6. At the same time, the second workbench 11 moves to the predetermined position of the extension warehouse 300, that is, the second workbench 11 is lifted by the planar cam 15 during the movement to the extension warehouse 300, and the final predetermined position is at the opening between the extension warehouse 300 and the pick-and-place warehouse 14, that is, the second workbench 11 and the first workbench 10 are on the same plane.

[0070] At this time, if Fig.12As shown, the first drive device 14-8 drives the circular isolation frame 14-1 to descend and contact with the second workbench 11 to form a seal, and fills air into the pick-and-place bin 14 to break the vacuum. When the air in the pick-and-place bin 14 is balanced with the external atmospheric pressure, the third drive device 14-11 drives the cover plate 14-2 to rise to the upper part of the stroke, and then the second drive device 14-3 drives the support plate 14-12 to drive the cover plate 14-2 to slide to one side, thereby opening the pick-and-place opening of the bin 14. Then the workpiece 17 is placed on the second workbench 11, and the second drive device 14-3 drives the support plate 14-12 to drive the cover plate 14-2 to slide back to the original position, and then the third drive device 14-11 drives the cover plate 14-2 to descend to the bottom of the stroke, and the cover plate contacts the flat sealing strip 14-13 on the pick-and-place bin housing 14-5, and forms a closed pick-and-place bin space 100 with the circular isolation frame 14-1 and the second workbench 11. The passage between the pick-and-place bin 14 and the vacuum source is connected to evacuate the pick-and-place bin 14. When there is no pressure difference between the pick-and-place bin 14 and the printing bin 1 or the pressure difference is less than a preset value, the passage between the pick-and-place bin 14 and the vacuum source is closed.

[0071] like Figure 13-15 As shown, after the vacuuming of the pick-and-place bin 14 is completed, the first driving device 14-8 drives the circular isolation frame 14-1 to rise, and after the filling work on the first workbench 10 is completed, the first workbench 10 is driven to exchange positions with the second workbench 11. That is, the second workbench 11 is moved to the main bin 200, and the printing mechanism 5 performs the filling operation on the workpiece 17 on the second workbench 11. At the same time, the first workbench 10 is moved to the extension bin 300, and the extension bin 300 is isolated from the pick-and-place bin 14. At this time, the vacuum of the pick-and-place bin 14 can be broken, and then the cover plate 14-2 is opened to replace the workpiece 17 on the first workbench 10, take out the workpiece that has been filled, put in the new workpiece to be filled, and then carry out the next cycle.

[0072] The above embodiments are all described by taking two workbenches as an example. Those skilled in the art will know that in other embodiments, more workbenches, such as three or four, may be provided. If the speed of the printing mechanism is fast enough and two workbenches cannot meet the needs of the printing mechanism, more workbenches may be provided. The principle is the same as that of two workbenches, and the present invention will not be repeated.

[0073] Although this application document describes the present invention according to the above specific embodiments, it should be understood that each of the above specific embodiments is not necessarily independent, and ordinary technicians in the field can implement them independently or make appropriate combinations to form other embodiments that ordinary technicians in the field can understand and implement.

[0074] The above embodiments are merely illustrative and non-restrictive, and any equivalent embodiments that do not depart from the spirit of the present invention should fall within the protection scope of the present invention.

Claims

1. A double-chamber vacuum printing device, comprising a printing chamber and a pick-and-place chamber, wherein a printing mechanism is arranged in the printing chamber, characterized in that: The printing chamber comprises a main chamber, an extension chamber connected to the main chamber is arranged on one side of the main chamber, the pick-and-place chamber is arranged above the extension chamber, an opening is arranged between the pick-and-place chamber and the extension chamber, a pick-and-place port is arranged on the pick-and-place chamber, and a cover plate assembly is arranged on the pick-and-place port; the double-chamber vacuum printing device also comprises at least two workbenches which can be moved alternately between the main chamber and the extension chamber, and when the workbenches are located in the extension chamber, the workbenches block the opening between the pick-and-place chamber and the extension chamber and form a seal; The first of the two workbenches moves horizontally between the main bin and the extension bin, and the second workbench rises to the same height as the first workbench during the movement from the main bin to the extension bin; A linear push rod is provided at the bottom of the second workbench, and a moving cam is provided on the path where the second workbench moves from the main bin to the extension bin. After the linear push rod contacts the moving cam, the moving cam pushes the linear push rod and drives the second workbench to rise to the same height as the first workbench; the workbench is located at a different height when it is located in the main bin; The cover plate assembly includes a cover plate and a support plate that can move horizontally under the drive of a second drive device, and a cover plate lifting guide column is arranged on the support plate, and the cover plate is sleeved on the cover plate lifting guide column; the cover plate assembly also includes a third drive device for driving the cover plate to lift.

2. The double chamber vacuum printing device according to claim 1, characterized in that: A circular isolation frame that can be raised and lowered under the first driving device is also provided at the opening between the pick-and-place bin and the extension bin. When the circular isolation frame is located at the lower position of the lifting stroke, it contacts the outer shell and the workbench of the pick-and-place bin respectively to seal the opening between the pick-and-place bin and the extension bin.

3. The double chamber vacuum printing device according to claim 2, characterized in that: A guide structure is also provided between the circular isolation frame and the pick-and-place bin shell.

4. The double chamber vacuum printing device according to claim 1, characterized in that: The workbench is located at the same height when it is located in the extension bin.

5. The double chamber vacuum printing device according to claim 1, characterized in that: There are two groups of linear push rods, each group includes two linear push rods, one group of linear push rods is arranged at the bottom of the second workbench on the side facing the extension warehouse, and the other group is arranged at the bottom of the second workbench on the side facing the main warehouse, and the distance between the two linear push rods in one group is greater than the distance between the two linear push rods in the other group; there are also two groups of movable cams, each group includes two movable cams, and the distance between the two groups of movable cams corresponds to the distance between the two groups of linear push rods.

6. The double chamber vacuum printing device according to claim 1, characterized in that: The linear push rod is a cam follower, and the moving cam is a planar cam.

7. The double chamber vacuum printing device according to claim 1, characterized in that: The second workbench includes a workbench plate, a guide member is arranged below the workbench plate, and the linear push rod is arranged at the bottom end of the guide member; a guide plate which can move relative to the guide member is sleeved on the guide member, and the guide plate moves horizontally between the main bin and the extension bin; wherein the guide member is a guide shaft or a guide rail.

8. The double chamber vacuum printing device according to claim 7, characterized in that: The guide plate is also provided with a guide sleeve arranged on the outside of the guide rail or a sliding block matched with the guide rail.

9. The double chamber vacuum printing device according to claim 7, characterized in that: Translation linear sliders are also arranged on both sides of the guide plate.

10. The double chamber vacuum printing device according to claim 1, characterized in that: The printing mechanism is arranged on a lifting mechanism, and the lifting mechanism is configured to enable the printing mechanism to stay in at least two positions, each position corresponding to a height when the workbench is located at the main warehouse position.

11. The double chamber vacuum printing device according to claim 1, characterized in that: The cover plate is also connected and fixed with a cover plate lifting guide sleeve, and the cover plate lifting guide sleeve is sleeved on the cover plate lifting guide column.

12. A vacuum printing method based on the double-chamber vacuum printing device according to any one of claims 1 to 11, wherein the double-chamber vacuum printing device comprises a printing chamber and a pick-and-place chamber, characterized in that: The printing chamber includes a main chamber and an extension chamber disposed on one side of the main chamber and connected to the main chamber, the placing and picking chamber is disposed above the extension chamber, and the vacuum printing method includes: Providing at least two workbenches, wherein one workbench is located in the extension bin and seals and isolates the pick-and-place bin from the printing bin, and the other workbench is located in the printing bin; Open the pick-and-place bin, place or replace the workpiece on the workbench, close the pick-and-place bin, and evacuate the pick-and-place bin; and use the printing mechanism to print and fill the workpiece on the workbench in the printing bin; Move the two workbenches so that one of them moves from the extension bin to the main bin and the other moves from the main bin to the extension bin, and return to the previous step; wherein, in the process of moving the workbenches, one of the workbenches moves horizontally, and the moving path of the other workbenches has a height difference, and the positions of the two workbenches in the extension bin are at the same height.

13. The vacuum printing method according to claim 12, characterized in that: The dual-chamber vacuum printing device also includes a liftable circular isolation frame arranged at the opening between the pick-up and placement chamber and the extension chamber, wherein: When the workbench is located in the extension bin, the circular isolation frame descends and together with the workbench seals and isolates the pick-and-place bin from the printing bin; After the pick-and-place bin is evacuated, the circular isolation frame rises to release the sealed isolation between the pick-and-place bin and the printing bin.

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