CN111267471A

CN111267471A - Double-bin type vacuum printing device and method

Info

Publication number: CN111267471A
Application number: CN202010290692.3A
Authority: CN
Inventors: 陈士丰; 王勇
Original assignee: KUNSHAN SUNUS PRECISION MACHINERY CO Ltd
Current assignee: KUNSHAN SUNUS PRECISION MACHINERY CO Ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-06-12

Abstract

The invention discloses a double-bin type vacuum printing device and a method. The device comprises a printing bin and a taking and placing bin, wherein a printing mechanism is arranged in the printing bin, and the printing bin is characterized by comprising a main bin, one side of the main bin is provided with an extension bin communicated with the main bin, the taking and placing bin is arranged above the extension bin, an opening is formed between the taking and placing bin and the extension bin, a taking and placing opening is formed in the taking and placing bin, and a cover plate assembly is arranged on the taking and placing opening; the double-bin type vacuum printing device further comprises at least two working tables capable of moving between the main bin and the extension bin in an alternating mode, and when the working tables are located in the extension bin, the working tables plug the opening between the taking and placing bin and the extension bin and seal the opening. The invention greatly improves the working efficiency and quality and saves a large amount of energy.

Description

Double-bin type vacuum printing device and method

Technical Field

The invention relates to the field of PCB (printed circuit board) and semiconductor chip production, in particular to a double-bin type vacuum printing device and method.

Background

The carrier surface of PCB and semiconductor chip has many holes, and the holes on the surface need to be filled with resin to make the surface smooth. In order to fill the through holes or blind holes on the PCB or chip sufficiently and uniformly, the PCB or chip is placed in a vacuum environment so that the holes to be filled are substantially free of air obstructions, and then ink is pressed into the holes through the screen by a squeegee. In order to achieve this, a printer is generally installed in a closed container, a door of the container is opened during operation, a table on which a printed circuit board is mounted is moved into the container, the door of the container is closed, air in the container is pumped up to a predetermined degree of vacuum by a vacuum pump to perform printing, after printing is completed, the door is opened again, the printed circuit board after processing is taken out, and next printing is performed. The mode needs to vacuumize and break the whole airtight gas, so that the efficiency is very low and a large amount of energy is wasted.

At present, the more advanced method is to divide the whole printing device into two areas, namely a printing cabin and a taking and placing cabin, so as to realize the printing action in the printing cabin and the taking and placing action in the taking and placing cabin. For example, chinese patent application publication No. CN1432469A discloses a vacuum printing apparatus having a housing having a closed door on a top plate and defining a closed internal space, a printer provided in the closed internal space, a workpiece table movable to be provided in the closed internal space for supplying a workpiece such as a printed wiring board to the printer, and an exhaust device connected to the closed internal space; the work table is movable between a closed position for hermetically partitioning the closed internal space into a first compartment (i.e., a take-and-place cabin) having the closed door and a second compartment (i.e., a printing cabin) having the printing machine therein and connected to an exhaust device, and a work supply position for supplying the work to the printing machine; when the workpiece workbench is in a blocking position and taken out and put in the workpiece, the sealing door can be opened.

Although the above scheme improves the initial process, the efficiency and the quality are improved. However, in the above-mentioned double-chamber vacuum printing apparatus, when the printing table carrying the PCB or the chip is in operation in the printing chamber, the action time of horizontally moving the scraper to squeeze the ink into the holes of the PCB or the chip through the screen is long, and is generally 20 seconds to 38 seconds. After the hole plugging action is completed, the printing workbench is translated back to the taking and placing bin area, the taking and placing bin breaks vacuum, the taking and placing bin door is opened, the processed workpiece is taken out, meanwhile, the next workpiece to be processed is placed, and the next cycle is started. Therefore, the printing machine is in a waiting state when the scraper moves horizontally to squeeze ink into holes of the PCB or the chip through the screen, that is, in the prior art, the printing operation and the material taking and placing operation need to be completed by one operation before the other operation is performed, which causes that the time consumed by processing a single piece is more than 60 seconds at present, and the efficiency is seriously influenced.

Disclosure of Invention

The invention aims to provide a double-bin type vacuum printing device and method which can greatly improve the working efficiency.

In order to solve the technical problems, the invention provides a double-bin type vacuum printing device which comprises a printing bin and a taking and placing bin, wherein a printing mechanism is arranged in the printing bin, the printing bin comprises a main bin, one side of the main bin is provided with an extending bin communicated with the main bin, the taking and placing bin is arranged above the extending bin, an opening is formed between the taking and placing bin and the extending bin, a taking and placing opening is formed in the taking and placing bin, and a cover plate assembly is arranged on the taking and placing opening; the double-bin type vacuum printing device further comprises at least two working tables capable of moving between the main bin and the extension bin in an alternating mode, and when the working tables are located in the extension bin, the working tables plug the opening between the taking and placing bin and the extension bin and seal the opening.

Furthermore, a clip-shaped isolation frame which can be lifted under a first driving device is further arranged at an opening between the taking and placing bin and the extending bin, and when the clip-shaped isolation frame is located at the lower part of the lifting stroke, the clip-shaped isolation frame is respectively contacted with a shell of the taking and placing bin and a workbench, so that the opening between the taking and placing bin and the extending bin is sealed.

Furthermore, a guide structure is arranged between the square-shaped isolation frame and the taking and placing bin shell.

Further, the working tables are located at the same height when located in the extension bin.

Further, the working tables are located at different heights when located in the main bin.

Further, a first workbench of the two workbenches moves horizontally between the main bin and the extension bin, and a second workbench rises to the same height as the first workbench in the process of moving from the main bin to the extension bin.

Further, a direct-acting push rod is arranged at the bottom of the second workbench, a moving cam is arranged on a path of the second workbench moving from the main bin to the extension bin, and after the direct-acting push rod is contacted with 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.

Furthermore, the two groups of the direct-acting push rods are arranged, each group comprises two direct-acting push rods, one group of the direct-acting push rods is arranged at the bottom of one side, facing the extension bin, of the second workbench, the other group of the direct-acting push rods is arranged at the bottom of one side, facing the main bin, of the second workbench, and the distance between the two direct-acting push rods of one group is larger than that between the two direct-acting push rods of the other group; the moving cams are also provided with two groups, each group comprises two moving cams, and the distance between the two groups of moving cams corresponds to the distance between the two groups of linear moving push rods respectively.

Further, the linear motion push rod is a cam follower, and the moving cam is a plane cam.

Furthermore, the second workbench comprises a workbench plate, a guide piece is arranged below the workbench plate, and the linear motion push rod is arranged at the bottom end of the guide piece; the guide piece is sleeved with a guide plate which can move relative to the guide piece, and the guide plate horizontally moves between the main bin and the extension bin; wherein, the guide piece is a guide shaft or a guide rail.

Furthermore, the guide plate is also provided with a guide sleeve sleeved outside the guide rail or a sliding block matched with the guide rail.

Furthermore, translation linear sliding blocks are further arranged on two sides of the guide plate.

Further, the printing mechanism is disposed on an elevating mechanism configured to allow the printing mechanism to stay at least two positions, each corresponding to a height of the working table at a main magazine position.

Furthermore, the cover plate assembly comprises a cover plate and a support plate which can horizontally move under the drive of a second driving device, 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 further comprises a third driving device for driving the cover plate to lift.

Furthermore, a cover plate lifting guide sleeve is fixedly connected to the cover plate and sleeved on the cover plate lifting guide column.

The invention also provides a vacuum printing method of the double-bin type vacuum printing device, the double-bin type vacuum printing device comprises a printing bin and a taking and placing bin, the printing bin comprises a main bin and an extending bin which is arranged on one side of the main bin and communicated with the main bin, the taking and placing bin is arranged above the extending bin, and the vacuum printing method comprises the following steps:

providing at least two working tables, wherein one working table is positioned in the extension bin and seals and isolates the taking and placing bin from the printing bin, and the other working table is positioned in the printing bin;

opening the picking and placing bin, placing or replacing a workpiece on the workbench, closing the picking and placing bin, and vacuumizing the picking and placing bin; meanwhile, printing and filling work is carried out on the workpiece on the workbench in the printing bin by using the printing mechanism;

moving the two working tables to enable one working table to move from the extension bin to the main bin and the other working table to move from the main bin to the extension bin, and returning to the previous step; in the process of moving the working tables, one working table horizontally moves, the moving path of the other working table has a height difference, and the positions of the two working tables in the extension bin are at the same height.

Furthermore, the double-bin type vacuum printing device also comprises a liftable and lowerable square-shaped isolation frame arranged at an opening between the taking and placing bin and the extending bin, wherein,

when the workbench is positioned in the extension bin, the square-shaped isolation frame descends, and the taking and placing bin and the printing bin are sealed and isolated together with the workbench;

and after the taking and placing bin is vacuumized, the square-shaped isolation frame ascends to remove the sealing isolation between the taking and placing bin and the printing bin.

The invention provides a double-bin type vacuum printing device and a double-bin type vacuum printing method, wherein at least two working tables are provided, when a PCB or a chip on one working table is filled at a printing mechanism of a printing bin, the other working table can be moved to a taking and placing bin to take and place materials, so that the working efficiency and the quality are greatly improved. The structural design of the invention ensures that the space for taking and placing the bin is very small, so that the vacuum pumping and breaking can be completed in a short time, the working efficiency is further improved, and a large amount of energy is saved.

Drawings

Fig. 1 is a schematic perspective view of a dual-chamber vacuum printing apparatus according to an embodiment of the present invention.

Fig. 2 is a side cross-sectional view of the embodiment shown in fig. 1.

Fig. 3 is a schematic perspective view of a second working table according to an embodiment of the present invention.

Fig. 4 is a side view of the embodiment of the table shown in fig. 3.

Fig. 5 is a schematic diagram of the movement of the embodiment of the table shown in fig. 3.

Fig. 6 is a schematic perspective view of an embodiment of a pick-and-place bin according to the present invention.

Fig. 7 is an enlarged view of a portion of the embodiment of fig. 6.

FIG. 8 is a partial cross-sectional view of one embodiment of a serpentine spacer frame of the present invention.

Fig. 9-15 are schematic views illustrating the operation of the dual chamber vacuum printing apparatus according to an embodiment of the present invention.

1. Printing bin, 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 platen, 11-2, guide shaft, 11-3, cam follower, 11-4, lower fixing plate, 11-5, guide plate, 11-6, guide sleeve, 11-7, translational linear slider, 12, lower transmission device, 13, upper transmission device, 14, taking and placing bin, 14-1, clip-shaped isolation frame, 14-2, cover plate, 14-3, second driving device, 14-4, cover plate translational guide rail, 14-5, taking and placing bin shell, 14-6, isolation frame lifting guide column, 14-7 and isolation frame lifting guide sleeve, 14-8 parts of a first driving device, 14-9 parts of a cover plate lifting guide column, 14-10 parts of a cover plate lifting guide sleeve, 14-11 parts of a third driving device, 14-12 parts of a support plate, 14-13 parts of a sealing strip, 15 parts of a plane cam, 16 parts of a frame, 17 parts of a workpiece, 100 parts of a pick-and-place bin space, 200 parts of a main bin, 300 parts of an extension bin.

Detailed Description

The present invention will be described in further detail below with reference to the attached drawings and detailed description, which should be noted to assist those skilled in the art to understand the present invention, and which are given by way of illustration and not limitation. Any structural, methodical, or functional modifications or variations that may occur to one skilled in the art in light of the foregoing description and the accompanying drawings and detailed description are intended to be within the scope of the present invention.

In the present invention, unless otherwise specifically stated or limited, the terms "connected" and "connecting" are used in a broad sense, and for example, the connecting may be a fixed connection, a detachable connection, or an integral molding, and the connecting manner is not limited, and the connecting may be through a bolt connection, a rivet connection, a welding connection, etc., a direct connection, or an indirect connection through another mechanism known to those skilled in the art. Those skilled in the art can understand the specific meaning of the above or other similar terms in the present invention according to specific situations.

In the present invention, the term "comprising" is to be understood as open-ended, i.e. including but not limited to, unless explicitly stated or limited otherwise.

As shown in fig. 1 and 2, an embodiment of the dual-chamber vacuum printing apparatus of the present invention includes a printing chamber 1 and a pick-and-place chamber 14, the printing chamber 1 and the pick-and-place chamber 14 are integrally disposed on a frame 16, a printing mechanism 5 is disposed in the printing chamber 1, the printing chamber 1 includes a main chamber 200, an extension chamber 300 is disposed on one side of the main chamber, and the extension chamber 300 is communicated with the main chamber 200. Generally, the extension bin 300 is provided as an integral structure with the main bin 200, which can achieve better sealing. Of course, the extension bin 300 and the main bin 200 may be manufactured separately and then hermetically connected together. The taking and placing bin 14 is arranged above the extending bin 200, an opening is formed between the taking and placing bin 14 and the extending bin 300, a taking and placing opening is formed in the taking and placing bin 14, and a cover plate assembly is arranged on the taking and placing opening. The double-chamber vacuum printing device of the present invention further comprises two work tables capable of moving alternately between the main chamber 200 and the extension chamber 300, and when the work tables are located in the extension chamber 300, the work tables close the opening between the pick-and-place chamber 14 and the extension chamber 300 and form a seal. A vacuum source (such as a vacuum pump 3) is connected with the printing cabin 1 and the taking and placing cabin 14 through a pipeline 4, and the on-off of an air path between the vacuum source and the printing cabin 1 and the taking and placing cabin 14 is controlled through a valve 2, so that the printing cabin 1 and/or the taking and placing cabin 14 are vacuumized or broken (namely, air is filled into the printing cabin and/or the taking and placing cabin, and the pressure of the air is the same as the external atmospheric pressure).

The embodiment is provided with two working tables which alternately move between the main bin 200 and the extension bin 300 of the printing bin 1, when one of the working tables is located in the main bin 200, the printing mechanism 5 performs filling operation on a workpiece 17 (including but not limited to a PCB (printed circuit board) and a chip) on the working table, and at the moment, the other working table is located in the extension bin 300 to perform picking and placing operation, and after the picking and placing operation is completed, the two working tables are exchanged. The invention fully utilizes the waiting time of the filling process of the printing mechanism to complete the replacement work of the workpiece, thereby greatly improving the working efficiency.

In addition, the structure of this embodiment can be designed to be very small with the pick-and-place space 100, as long as it can hold the lower PCB or chip and the carrier thereof, so that when the pick-and-place chamber is vacuumized or broken, it can be completed in a short time, thereby greatly improving the efficiency and saving the energy.

In order to realize that the two working tables can be alternately moved between the main chamber 200 and the extension chamber 300, it is preferable that the two working tables are located at the same height when they are located in the extension chamber 300, and at different heights when they are located in the main chamber 200. In this way, the two work tables do not interfere with each other when they are alternately moved between the main bin 200 and the extension bin 300. For example, as shown in fig. 2, the first work table 10 of the two work tables is horizontally moved between the main bin 200 and the extension bin 300, and the second work table 11 is lowered by a height during the movement from the extension bin 300 to the main bin 200, and accordingly, the second work table 11 is raised by the same height as the first work table 10 during the movement from the main bin 200 to the extension bin 300. Of course, in other embodiments, the first working platform 10 and the second working platform 11 may be located at the same height when located in the main bin 200.

In order to realize the lifting of the second worktable 11 in the moving process from the main bin 200 to the extension bin 300, a linear motion push rod is arranged at the bottom of the second worktable 11, a moving cam is arranged on a traveling path of the second worktable 11 moving from the main bin to the extension bin, and in the moving process of the second worktable 11 from the main bin to the extension bin, after the linear motion push rod is contacted with the moving cam, the moving cam pushes the linear motion push rod and drives the second worktable to rise to the same height as the first worktable.

As shown in fig. 2, in this embodiment, the linearly moving push rod employs the cam follower 11-3, and the moving cam employs the flat cam 15 provided on the frame 14. The cam followers are easy to purchase, while the flat cams 15 are simple in structure and convenient to manufacture, and the matching cost of the cam followers and the flat cams is very low. In other embodiments, the linear motion push rod may be a slider or other structures, and the moving cam may also be an arc shape, so long as the moving cam cooperates with the slider or the like to lift the second table 11. Of course, in other embodiments, the second working table may be lifted up by an oil cylinder or the like during the process of moving the second working table horizontally.

In addition, the second worktable can be horizontally moved to the extension bin, and then the second worktable is lifted to the same height as the first worktable by a lifting mechanism (such as a hydraulic mechanism, a screw rod mechanism and the like).

As shown in fig. 3 to 5, as a preferred embodiment, there are two sets of the cam followers as the linearly moving pushrods, each set including two cam followers 11-3, wherein one set of the cam followers is disposed at the bottom of the side of the second table 11 facing the extension bin 300, the other set is disposed at the bottom of the side of the second table 11 facing the main bin 200, and the distance between the two cam followers of one set is greater than the distance between the two cam followers of the other set; two sets of plane cams as moving cams are also provided, each set including two plane cams 15, and the distance between the two sets of plane cams 15 corresponds to the distance between the two sets of cam followers 11-3, respectively. That is, in this embodiment, the widths of the front and rear cam followers are different, and the front and rear cam followers 11-3 are matched with the corresponding planar cams, so that the front and rear cam followers can be lifted simultaneously, and the second working table 11 is kept horizontal in the lifting process.

As shown in fig. 3 and 4, in this embodiment, the second worktable 11 comprises a worktable plate 11-1, a guide shaft 11-2 as a guide is arranged below the worktable plate 11-1, and a linear motion push rod is arranged at the bottom end of the guide shaft 11-2; the guide shaft 11-2 is sleeved with a guide plate 11-5, and the guide shaft 11-2 can slide up and down relative to the guide plate 11-5. Referring to fig. 5, in operation, when the second working platform 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 platform guide rail 8, the guide shaft 11-2 and the second working platform 11 move horizontally along the guide plate 11-5 at the beginning, when the cam follower 11-3 at the bottom of the guide shaft 11-2 contacts the plane cam 15, the guide plate 11-5 drives the second working platform 11 to move continuously towards the extension bin due to the transverse limiting action of the guide plate 11-5, and at this time, due to the action of the plane cam 15, the cam follower 11-3 also ascends along the plane cam 15 while moving transversely, and drives the guide shaft 11-2 and the working platform 11-1 to ascend simultaneously. Finally, when the cam follower 11-3 moves to the top end of the plane cam 15, the table plate 11-1 of the second table 11 is also raised to the same height as the first table 10.

Preferably, a guide sleeve 11-6 is further arranged on the guide plate 11-5, and the guide sleeve 11-6 is sleeved outside the guide shaft 11-2. Through setting up the uide bushing, increased direction area of contact to can realize better direction.

In other embodiments, a guide rail can be used as the guide member, and a slide block extending upwards and/or downwards is arranged on the guide plate, so that the purpose of increasing the guide contact area and achieving better guide can be achieved through the cooperation of the slide block and the guide rail.

The two sides of the guide plate 11-5 are also provided with translational linear sliding blocks 11-7, and the translational linear sliding blocks 11-7 can ensure that the guide plate 11-5 can stably move transversely.

Since the different stations in the embodiment of the present invention have different heights in the main magazine 200, in order to be able to print on the workpieces 17 on the different stations, the printing mechanism 5 may be arranged on a lifting mechanism configured to allow the printing mechanism 5 to stay in at least two positions, each corresponding to the height of a station in the main magazine position. Of course, the lifting mechanism can also be designed so that the number of positions at which the printing mechanism 5 can rest is greater than the number of stations, for example so that the printing mechanism 5 can also rest in an "idle" position higher than any one station. The "no load" position is present to avoid the risk of the table moving and colliding with the screen 7 of the printing mechanism 5 due to an accidental change in the position of the workpiece 17 or other tool on the table.

As shown in fig. 6 to 8, in the embodiment of the present invention, a clip isolation frame 14-1 capable of being lifted and lowered under the first driving device 14-8 is further disposed at the opening between the pick-and-place bin 14 and the extension bin 300, and when the clip isolation frame 14-1 is located at the lower position of the lifting stroke, it is respectively contacted with the pick-and-place bin housing 14-5 and the workbench to seal the opening between the pick-and-place bin 14 and the extension bin 300. By providing the rectangular isolation frame 14-1, a better seal can be achieved.

Preferably, a guide structure can be arranged between the square isolation frame 14-1 and the pick-and-place bin shell 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, one of the isolation frame lifting guide post 14-6 and the isolation frame lifting guide sleeve 14-7 is arranged on the picking and placing bin shell 14-5, and the other one is arranged on the clip-shaped isolation frame 14-1. The guide structure can ensure the stability of the clip-shaped isolation frame 14-1 during lifting. Of course, a special isolation frame lifting guide sleeve is not arranged, and a hole can be directly drilled in the square isolation frame 14-1 or the pick-and-place bin shell 14-5 to play a role in guiding.

As shown in fig. 6 and 8, the cover plate assembly in one embodiment of the present invention includes a cover plate 14-2 and a support plate 14-12 driven by a second driving device 14-3 to move horizontally along a cover plate translation guide rail 14-4, the support plate 14-12 is provided with a cover plate lifting guide column 14-9, and the cover plate 14-2 is sleeved on the cover plate lifting guide column 14-9; the cover plate assembly further comprises a third driving device 14-11 for driving the cover plate 14-2 to ascend and descend. The third driving device 14-11 drives the cover plate 14-2 to lift, and when the cover plate 14-2 descends to the bottom of the stroke, the cover plate 14-2, the pick-and-place bin shell 14-5, the square isolation frame 14-1 and the workbench form a pick-and-place bin space 100. When the third driving device 14-11 drives the cover plate 14-2 to ascend to the upper part of the stroke, the second driving device 14-3 drives the support plate 14-12 to drive the cover plate 14-2 to slide to one side, so that the taking and placing opening of the taking and placing bin 14 is opened. After the workpiece 17 is taken and placed, the sealing of the taking and placing bin 14 is completed again through the reverse work flow. In order to realize better guiding, a cover plate lifting guide sleeve 14-10 can be fixedly connected 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. The driving devices in the invention can adopt a cylinder, a hydraulic cylinder or a motor and other driving devices.

In order to realize better sealing, sealing gaskets or sealing strips 14-13 can be arranged on the contact surfaces between the square-shaped isolation frame 14-1 and the workbench and the taking and placing bin shell 14-5, and between the cover plate 14-2 and the support plate 14-12 and the taking and placing bin shell 14-5.

The invention provides an embodiment of a vacuum printing method of a double-bin type vacuum printing device, wherein the double-bin type vacuum printing device comprises a printing bin and a taking and placing bin, the printing bin comprises a main bin and an extending bin which is arranged on one side of the main bin and communicated with the main bin, and the taking and placing bin is arranged above the extending bin, and the vacuum printing method of the embodiment comprises the following steps:

opening the picking and placing bin, placing or replacing the workpiece on the workbench, closing the picking and placing bin, and vacuumizing the picking and placing bin; meanwhile, the printing mechanism is used for printing and filling the workpiece on the workbench in the printing bin;

and moving the two working tables to enable one of the working tables to move from the extension bin to the main bin, and enabling the other working table to move from the main bin to the extension bin, and returning to the previous step.

In the process of moving the working tables, one working table horizontally moves, and the moving path of the other working table has a height difference, namely the other working table can descend by a certain height in the process of moving from the extension bin to the main bin so as to avoid colliding with the first working table; and the other workbench can be lifted to a certain height in the process of moving from the main bin to the extension bin, so that the two workbenches are positioned at the same height in the extension bin.

In addition, the double-chamber vacuum printing device can also comprise a liftable square-shaped isolation frame arranged at an opening between the taking and placing chamber and the extending chamber, wherein,

when the workbench is positioned in the extension bin, the square-shaped isolation frame descends and seals and isolates the taking and placing bin and the printing bin together with the workbench;

after the replacement work is finished and the taking and placing bin is vacuumized, the square-shaped isolation frame ascends to remove the sealing isolation between the taking and placing bin and the printing bin.

Specifically, as shown in fig. 9 to 15, the operation of the dual chamber vacuum printing apparatus according to the embodiment of the present invention is as follows:

first, as shown in fig. 9, the first working table (or the second working table) is moved to the extension bin along the upper platen rail 9, the first driving device 14-8 drives the square-shaped isolation frame 14-1 to descend to contact with the first working table 10 to form a seal, a passage between the printing bin 1 and the vacuum source is connected, the printing bin 1 is vacuumized, and 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. Simultaneously or after the first driving device 14-11 drives the cover plate 14-2 to ascend to the upper part of the stroke, then the second driving device 14-3 drives the support plate 14-12 to drive the cover plate 14-2 to slide to one side, so that the taking and placing opening of the bin 14 is opened, 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 drive the cover plate 14-2 to slide back to the original position, the third driving device 14-11 drives the cover plate 14-2 to descend to the bottom of the stroke, the cover plate 14-2 is in contact with the pick-and-place bin shell 14-5, and a sealed pick-and-place bin space 100 is formed by the cover plate 14-2, the square-shaped isolation frame 14-1 and the first workbench 10. And (3) switching on a passage between the picking and placing bin 14 and a vacuum source, vacuumizing the picking and placing bin 14, and closing the passage between the picking and placing bin 14 and the vacuum source when no pressure difference exists between the picking and placing bin 14 and the printing bin 1 or the pressure difference is smaller than a preset value.

Then, as shown in fig. 10, the first driving device 14-8 drives the rectangular frame 14-1 to ascend, and the first table 10 and the second table 11 exchange positions, that is, the first table 10 is driven to move toward the main chamber 200, and the second table 11 is driven to move toward the extension chamber 300. After the cam follower 11-3 at the bottom of the second table 11 comes into contact with the flat cam 15, as shown in fig. 11, the second table 11 is lifted upward and finally lifted to the same height as the first table 10 by the push of the flat cam 15. Since the first table 10 and the second table 11 have a height difference in most of the paths, the first table 11 and the second table 12 do not collide and interfere with each other, and the position exchange can be smoothly performed. After the first table 10 is moved to a predetermined position of the main hopper 200, the printing mechanism 5 is lowered to the height of the first table 10 by the lifting device installed at the lower end of the printing mechanism 5, and the work 17 on the first table 10 is filled by the doctor blade 6. Meanwhile, the second working platform 11 is moved to a predetermined position of the extension bin 300, that is, the second working platform 11 is lifted by the plane cam 15 during moving to the extension bin 300, and the final predetermined position is at the opening between the extension bin 300 and the pick-and-place bin 14, that is, the second working platform 11 is on the same plane as the first working platform 10.

At this time, as shown in fig. 12, the first driving device 14-8 drives the square-shaped isolation frame 14-1 to descend to contact with the second worktable 11 to form a seal, and air is filled into the taking and placing bin 14 to break vacuum. When the air in the taking and placing bin 14 is balanced with the external atmospheric pressure, the third driving device 14-11 drives the cover plate 14-2 to ascend to the upper part of the stroke, and then the second driving device 14-3 drives the support plate 14-12 to drive the cover plate 14-2 to slide to one side, so that the taking and placing opening of the bin 14 is opened. Then, a workpiece 17 is placed on the second workbench 11, the second driving device 14-3 drives the support plate 14-12 to drive the cover plate 14-2 to slide back to the original position, the third driving device 14-11 drives the cover plate 14-2 to descend to the bottom of the stroke, the cover plate is in contact with the plane sealing strip 14-13 on the pick-and-place bin shell 14-5, and the cover plate, the square-shaped isolation frame 14-1 and the second workbench 11 form a closed pick-and-place bin space 100. And (3) switching on a passage between the picking and placing bin 14 and a vacuum source, vacuumizing the picking and placing bin 14, and closing the passage between the picking and placing bin 14 and the vacuum source when no pressure difference exists between the picking and placing bin 14 and the printing bin 1 or the pressure difference is smaller than a preset value.

As shown in fig. 13-15, after the vacuum pumping of the pick-and-place bin 14 is completed, the first driving device 14-8 drives the square-shaped isolation frame 14-1 to ascend, and simultaneously drives the first workbench 10 and the second workbench 11 to exchange positions after the filling work on the first workbench 10 is completed. Namely, the second workbench 11 is moved to the main bin 200, the printing mechanism 5 is used for filling the workpiece 17 on the second workbench 11, meanwhile, the first workbench 10 is moved to the extension bin 300, the extension bin 300 is isolated from the pick-and-place bin 14, the pick-and-place bin 14 can be vacuumized, then the cover plate 14-2 is opened to replace the workpiece 17 on the first workbench 10, the filled workpiece is taken out, a new workpiece to be filled is put in, and the next cycle is carried out.

The above embodiments are all described by taking two working tables as an example, and those skilled in the art can understand that in other embodiments, more working tables, for example, three or four working tables, may be provided. If the speed of the printing mechanism is fast enough, when the two working tables cannot meet the requirement of the printing mechanism, more working tables can be arranged, the principle of the working tables is consistent with that of the two working tables, and the working tables are not repeated.

Although the present invention has been described in terms of the above embodiments, it is to be understood that each of the above embodiments is not necessarily independent, and can be implemented independently or combined as appropriate by one of ordinary skill in the art to form other embodiments that can be understood and implemented by one of ordinary skill in the art.

The above embodiments are merely exemplary and not restrictive, and any equivalent embodiments made without departing from the spirit of the present invention should fall within the scope of the present invention.

Claims

1. A double-bin type vacuum printing device comprises a printing bin and a taking and placing bin, wherein a printing mechanism is arranged in the printing bin, and the double-bin type vacuum printing device is characterized in that the printing bin comprises a main bin, one side of the main bin is provided with an extension bin communicated with the main bin, the taking and placing bin is arranged above the extension bin, an opening is formed between the taking and placing bin and the extension bin, a taking and placing opening is formed in the taking and placing bin, and a cover plate assembly is arranged on the taking and placing opening; the double-bin type vacuum printing device further comprises at least two working tables capable of moving between the main bin and the extension bin in an alternating mode, and when the working tables are located in the extension bin, the working tables plug the opening between the taking and placing bin and the extension bin and seal the opening.

2. The dual-chamber vacuum printing apparatus as claimed in claim 1, wherein a clip-shaped isolation frame capable of being lifted by the first driving device is further disposed at an opening between the pick-and-place chamber and the extension chamber, and the clip-shaped isolation frame is respectively in contact with the housing and the worktable of the pick-and-place chamber when located at a lower position of a lifting stroke, so as to seal the opening between the pick-and-place chamber and the extension chamber.

3. The dual-bin vacuum printing apparatus of claim 2, wherein a guide structure is further disposed between the square isolation frame and the pick-and-place bin housing.

4. A twin bin vacuum printing apparatus as defined in any one of claims 1 to 3 in which the tables are at the same height when located in the extended bin.

5. A twin bin vacuum printing apparatus as claimed in any one of claims 4 in which the tables are at different heights when located in the main bin.

6. The dual chamber vacuum printing apparatus of claim 4, wherein a first of the two stations moves horizontally between the main chamber and the extension chamber, and a second station rises to the same height as the first station during movement from the main chamber to the extension chamber.

7. The double-chamber vacuum printing device according to claim 6, wherein a linear motion push rod is arranged at the bottom of the second working table, a moving cam is arranged on a path of the second working table moving from the main chamber to the extension chamber, and after the linear motion push rod contacts with the moving cam, the linear motion push rod is pushed by the moving cam and drives the second working table to rise to the same height as the first working table.

8. The dual-chamber vacuum printing apparatus as claimed in claim 7, wherein there are two sets of the linear motion pushing rods, each set includes two linear motion pushing rods, one set of the linear motion pushing rods is disposed at the bottom of the second worktable facing to the side of the extension chamber, the other set is disposed at the bottom of the second worktable facing to the side of the main chamber, and the distance between the two linear motion pushing rods of one set is greater than the distance between the two linear motion pushing rods of the other set; the moving cams are also provided with two groups, each group comprises two moving cams, and the distance between the two groups of moving cams corresponds to the distance between the two groups of linear moving push rods respectively.

9. The dual bin vacuum printing apparatus of claim 7 or 8, wherein the linearly moving push rod is a cam follower and the moving cam is a flat cam.

10. The dual chamber vacuum printing apparatus as in claim 7 or 8, wherein the second table comprises a table plate, a guide member is disposed below the table plate, and the linear motion push rod is disposed at a bottom end of the guide member; the guide piece is sleeved with a guide plate which can move relative to the guide piece, and the guide plate horizontally moves between the main bin and the extension bin; wherein, the guide piece is a guide shaft or a guide rail.

11. The twin bin vacuum printing apparatus as defined in claim 10 wherein the guide plate is further provided with a guide sleeve fitted outside the guide rail or a slider engaged with the guide rail.

12. The dual bin vacuum printing apparatus of claim 10, wherein said guide plate is further provided with linear translation slides on both sides.

13. The dual bin vacuum printing apparatus of claim 5, wherein the printing mechanism is disposed on an elevator mechanism configured to allow the printing mechanism to remain in at least two positions, each position corresponding to a height of the table when in the main bin position.

14. The dual-chamber vacuum printing apparatus as claimed in claim 1, wherein the cover assembly comprises a cover plate and a support plate driven by the second driving device to move horizontally, the support plate is provided with a cover plate lifting guide post, and the cover plate is sleeved on the cover plate lifting guide post; the cover plate assembly further comprises a third driving device for driving the cover plate to lift.

15. The dual-chambered vacuum printing apparatus of claim 14, wherein said cover plate further comprises a cover plate lift guide sleeve fixedly attached to said cover plate, said cover plate lift guide sleeve being disposed on said cover plate lift guide post.

16. A vacuum printing method of a double-chamber type vacuum printing device, wherein the double-chamber type vacuum printing device comprises a printing chamber and a taking and placing chamber, the printing chamber comprises a main chamber and an extending chamber which is arranged on one side of the main chamber and communicated with the main chamber, the taking and placing chamber is arranged above the extending chamber, and the vacuum printing method comprises the following steps:

17. The vacuum printing method of a twin chamber vacuum printing apparatus as claimed in claim 16, further comprising a liftable and lowerable rectangular frame disposed at an opening between the pick-and-place chamber and the extension chamber, wherein,