CN113771481B

CN113771481B - Double-table vacuum printing method and printing device thereof

Info

Publication number: CN113771481B
Application number: CN202011052688.XA
Authority: CN
Inventors: 林志城
Original assignee: Lenstar Precision Machinery Co ltd
Current assignee: Lenstar Precision Machinery Co ltd
Priority date: 2020-06-09
Filing date: 2020-09-29
Publication date: 2023-05-23
Anticipated expiration: 2040-09-29
Also published as: CN212765268U; CN113771481A

Abstract

A double-table vacuum printing method and a printing device thereof can quickly exchange tables after vacuum printing through a first table module and a second table module, and two groups can share the same first lifting mechanism to perform airtight material changing operation; in addition, a dual-table vacuum printing device is provided, which can move in the first cavity and the second cavity through the first workbench module and the second workbench module. When the first workbench module moves to the first cavity and moves out the first workpiece through the cavity door, the second workbench module moves to the second cavity and the printing module prints the second workpiece, so that the manufacturing cost can be effectively saved, the effective vacuum printing time can be shortened, and the productivity efficiency can be improved.

Description

Double-table vacuum printing method and printing device thereof

Technical Field

The present invention relates to the field of vacuum printing technology, and more particularly, to a dual-mesa vacuum printing method and a printing apparatus thereof, and a dual-mesa vacuum printing method with positionable mesa and a printing apparatus thereof.

Background

Resin hole filling technology, which is a technology for filling resin into a through hole by a pressure difference in a vacuum state of a vacuum printing device for a printed circuit board, is becoming more and more widespread in the industry of printed circuit boards, such as a POFV process (via on pad).

In the vacuum printing device of the prior art, as shown in fig. 1, the vacuum printing device comprises a first cavity C1 and a second cavity C2, wherein the first cavity C1 is provided with an opening O at a top wall W, a sealing door D is provided at the opening O, a table T can be moved between the first cavity C1 and the second cavity C2 by means of a guide rail, a printed circuit board can be placed on the table T through the opening O, the table T is lifted up by means of a lifting mechanism to be abutted against the top wall W of the first cavity C1, so that an airtight space is formed between the table T, the top wall W and the sealing door D, and the airtight space forms an airtight with other parts of the first compartment, thereby the other parts of the first compartment can maintain a vacuum state when the printed circuit board is placed on or taken out from the table T.

However, in the vacuum printing apparatus shown in fig. 1, when the workbench T moves from the first cavity C1 to the second cavity C2 to perform material changing, the printing module located in the second cavity C2 has an idle state, and after the workbench T finishes material changing in the first cavity C1, the workbench carries an unprocessed printed circuit board and returns to the second cavity C2, and the printing module can continue to perform printing operation. Due to the idle waiting time, the overall productivity is affected. In addition, as disclosed in japanese patent JP2001267339a, a vacuum printing apparatus prints in a printing area after feeding a workpiece, discharges after printing, feeds a new workpiece, waits for a working time after printing is completed and discharging on the feeding, and cannot improve printing efficiency. In addition, as the vacuum printing device disclosed in taiwan patent I267330, the single-stage lifting method makes the printing device reach the vacuum environment for printing, but the time for performing the vacuum printing on the single-stage is still long, and the waiting time is also high.

In addition, since the table T is likely to be inclined or skewed when the table T is moved from the first chamber C1 to the second chamber C2 for the material exchange, this tends to reduce the yield of printing.

Disclosure of Invention

Therefore, the present invention is directed to a dual-stage vacuum printing method and a printing device thereof, which are used for solving the problem that the printing module is idle during the material changing of the workbench in the prior art.

The invention provides a dual-table vacuum printing method with a positionable table top and a printing device thereof, which are used for solving the problems that in the prior art, when a workbench is used for material changing, a printing module is idle and when the workbench is moved, the workbench is easy to incline or skew.

The invention further provides a double-table vacuum printing method and a printing device thereof, by which the two groups can be quickly exchanged after vacuum printing through the up-down arrangement of the first table module and the second table module, and the two groups share the same first lifting mechanism to perform airtight material changing, so that the manufacturing cost can be effectively saved, the effective vacuum printing time can be shortened, and the productivity efficiency can be improved.

The technical means adopted by the invention are as follows.

An embodiment of the vacuum printing method of the present invention at least comprises the following steps: providing a double-table vacuum printing device; moving a second workbench to a first cavity and corresponding to a feeding and discharging opening, and simultaneously moving a first workbench to a second cavity and corresponding to a printing module; enabling the printing module to print a first workpiece carried by the first workbench; when the first workpiece is printed, the second workbench enables a second sealing piece to be abutted against a flange to form a second feeding and discharging space; the second feeding and discharging space is communicated with the outside atmosphere, and then a cavity door is opened and a second workpiece is replaced; exhausting the second feeding and discharging space until the air pressure of the second feeding and discharging space is the same as that of the second cavity, and then descending the second workbench; after the first workpiece is printed, the first workbench is moved to the first cavity and corresponds to the feeding and discharging opening, and the second workbench is moved to the printing module; enabling the printing module to print the second workpiece carried by the second workbench; when the second workpiece is printed, the first workbench and the first sealing piece are abutted against the flange to form a first feeding and discharging space; the first feeding and discharging space is communicated with the outside atmosphere, and then the cavity door is opened and the first workpiece is replaced; and exhausting the first feeding and discharging space until the air pressure of the first feeding and discharging space is the same as that of the second cavity, and then descending the first workbench.

In another embodiment, the dual mesa vacuum printing method further comprises the steps of: the printing time of the second cavity is greater than or equal to the material changing time of the first cavity.

In another embodiment, the dual mesa vacuum printing method further comprises the steps of: the first lifting mechanism is used for lifting the first workbench and the second workbench respectively.

An embodiment of the dual-table vacuum printing device is suitable for the dual-table vacuum printing method, and at least comprises a first cavity, a cavity door, a second cavity, a printing module, a first workbench module and a second workbench module. The first cavity is provided with a cavity wall, and a feeding and discharging opening is arranged on the cavity wall. The cavity door can hermetically seal the feed and discharge opening. The second cavity is communicated with the first cavity. The printing module is arranged in the second cavity. The first workbench module carries a first workpiece and can move in the first cavity and the second cavity. The second workbench module carries a second workpiece and can move in the first cavity and the second cavity. When the first workbench module moves to the first cavity and the first workpiece is moved out through the cavity door, the second workbench module moves to the second cavity and the printing module prints the second workpiece.

In another embodiment, the first table module includes a first table and a first sealing member, the first table carries the first workpiece, the first sealing member surrounds the first table, the first cavity further has a flange, the flange is disposed around the feeding and discharging opening, the first sealing member can be abutted against the flange, so that the first sealing member, the first table and the flange form a first feeding and discharging space, the first feeding and discharging space and the first cavity form an airtight, and the first feeding and discharging space is communicated with the outside of the first cavity through the feeding and discharging opening.

In another embodiment, the dual-table vacuum printing apparatus of the present invention further includes a first rail disposed in the first chamber and the second chamber, and the first table is movably disposed in the first rail and guided by the first rail to reciprocate in the first chamber and the second chamber.

In another embodiment, the second table module includes a second table and a second sealing member, the second table carries the second workpiece, the second sealing member surrounds the second table, the second sealing member can be abutted against the flange, so that the second sealing member, the second table and the flange form a second feeding and discharging space, the second feeding and discharging space and the first cavity form airtight, and the other feeding and discharging space is communicated with the outside of the first cavity through the second feeding and discharging opening.

In another embodiment, the dual-table vacuum printing apparatus of the present invention further includes a second rail disposed in the first chamber and the second chamber, and the second table is movably disposed in the second rail and guided by the second rail to reciprocate in the first chamber and the second chamber.

In another embodiment, the first rail and the second rail are different in height so that the first table moving on the first rail does not interfere with the second table moving on the second rail.

In another embodiment, the dual-table vacuum printing apparatus of the present invention further includes a first lifting mechanism disposed in the first cavity and corresponding to the feeding and discharging opening, wherein the first lifting mechanism makes the first table or the second table rise to abut against the flange or makes the first table descend to the first track or makes the second table descend to the second track.

In another embodiment, the dual-table vacuum printing apparatus of the present invention further includes a second lifting mechanism disposed in the second chamber, and the second lifting mechanism is configured to move the printing module to print the first workpiece on the first table or the second workpiece on the second table.

In another embodiment, the dual-stage vacuum printing apparatus of the present invention further comprises an exhaust mechanism, which is communicated with the first feeding and discharging space or the second feeding and discharging space, and exhausts the air in the first feeding and discharging space or the second feeding and discharging space out of the first cavity.

According to the double-table vacuum printing method and the printing device thereof, the first workbench module and the second workbench module are arranged in the first cavity and the second cavity, when one workbench module performs material changing in the first cavity, the other workbench module performs printing operation in the second cavity, and when the printing operation and the material changing operation are completed, the positions of the two workbench modules are interchanged, and the material changing operation and the printing operation are respectively and continuously performed. Therefore, the idle state is not generated during the vacuum printing operation and the material changing operation, and the productivity can be improved.

Furthermore, an embodiment of the vacuum printing method of the present invention at least comprises the following steps: providing a double-table vacuum printing device with a positionable table top; positioning a first workbench on a first transmission mechanism, and positioning a second workbench on a second transmission mechanism; the second transmission mechanism is used for moving the second workbench to a first cavity and corresponds to a feeding and discharging opening, and meanwhile, the first transmission mechanism is used for moving the first workbench to a second cavity and corresponds to a printing module; enabling the printing module to print a first workpiece carried by the first workbench; when the first workpiece is printed, the second workbench is positioned on a first lifting mechanism, and the first lifting mechanism is lifted and enables a second sealing piece to be abutted against a flange so as to form a second feeding and discharging space; the second feeding and discharging space is communicated with the outside atmosphere, and then a cavity door is opened and a second workpiece is replaced; exhausting the second feeding and discharging space until the air pressure of the second feeding and discharging space is the same as that of the second cavity, and then descending the second workbench; after the first workpiece is printed, the first workbench is moved to the first cavity and corresponds to the feeding and discharging opening, and the second workbench is moved to the printing module; enabling the printing module to print the second workpiece carried by the second workbench; when the second workpiece is printed, the first workbench is positioned on the first lifting mechanism, and the first lifting mechanism is lifted and enables the first sealing piece to be abutted against the flange so as to form a first feeding and discharging space; the first feeding and discharging space is communicated with the outside atmosphere, and then the cavity door is opened and the first workpiece is replaced; and exhausting the first feeding and discharging space until the air pressure of the first feeding and discharging space is the same as that of the second cavity, and then descending the first workbench.

In another embodiment, the mesa positionable dual mesa vacuum printing method further comprises the steps of: the printing time of the second cavity is greater than or equal to the material changing time of the first cavity.

In another embodiment, the mesa positionable dual mesa vacuum printing method further comprises the steps of: the first lifting mechanism is used for lifting the first workbench and the second workbench respectively; and supporting the center of the first work table or the center of the second work table to prevent the first work table or the second work table from bending deformation when the first work table or the second work table performs printing.

An embodiment of the table-top positionable double-table-top vacuum printing device is applicable to the table-top positionable double-table-top vacuum printing method, and at least comprises a first cavity, a cavity door, a second cavity, a printing module, a first workbench module and a second workbench module. The first cavity is provided with a cavity wall, and a feeding and discharging opening is arranged on the cavity wall. The cavity door can hermetically seal the feed and discharge opening. The second cavity is communicated with the first cavity. The printing module is arranged in the second cavity. The first workbench module comprises a first workbench and a first transmission mechanism, wherein the first workbench bears a first workpiece and can move in the first cavity and the second cavity, the first transmission mechanism comprises a plurality of first positioning pieces, and the first workbench is positioned in the first transmission mechanism by the first positioning pieces. The second workbench module comprises a second workbench and a second transmission mechanism, the second workbench bears a second workpiece, the second transmission mechanism bears the second workbench to move in the first cavity and the second cavity, the second transmission mechanism comprises a plurality of second positioning pieces, and the second workbench is positioned in the second transmission mechanism by the second positioning pieces. When the first workbench module moves to the first cavity and the first workpiece is moved out through the cavity door, the second workbench module moves to the second cavity and the printing module prints the second workpiece. When the first workbench module and the second workbench module move between the first cavity and the second cavity, the first positioning pieces enable the first workbench to be positioned on the first transmission mechanism, and the second positioning pieces enable the second workbench to be positioned on the second transmission mechanism.

In another embodiment, the first table module further includes a first sealing member surrounding the first table, the first cavity further has a flange, the flange is disposed around the feeding and discharging opening, the first sealing member can be abutted against the flange, so that the first sealing member, the first table and the flange form a first feeding and discharging space, the first feeding and discharging space and the first cavity form airtight, and the first feeding and discharging space is communicated with the outside of the first cavity through the feeding and discharging opening.

In another embodiment, the table-positionable dual-table vacuum printing apparatus of the present invention further comprises a first rail disposed in the first chamber and the second chamber, wherein the first table is movably disposed on the first rail and guided by the first rail to reciprocate in the first chamber and the second chamber.

In another embodiment, the second table module further includes a second sealing member surrounding the second table, the second sealing member being capable of abutting against the flange, such that the second sealing member, the second table and the flange form a second feeding and discharging space, the second feeding and discharging space and the first cavity form airtight, and the other feeding and discharging space is communicated with the outside of the first cavity through the second feeding and discharging opening.

In another embodiment, the table-positionable dual-table vacuum printing apparatus of the present invention further comprises a second rail disposed in the first chamber and the second chamber, wherein the second table is movably disposed in the second rail and guided by the second rail to reciprocate in the first chamber and the second chamber.

In another embodiment, the table-positionable dual-table vacuum printing apparatus of the present invention further includes a first lifting mechanism disposed in the first cavity and corresponding to the feeding/discharging opening, wherein the first lifting mechanism lifts the first table or the second table to abut against the flange or lowers the first table to the first track or lowers the second table to the second track. The first lifting mechanism comprises a plurality of third positioning pieces, and when the first lifting mechanism enables the first workbench or the second workbench to ascend or descend, the third positioning pieces enable the first workbench or the second workbench to be positioned on the first lifting mechanism.

In another embodiment, the table-positionable dual-table vacuum printing apparatus of the present invention further comprises a second lifting mechanism disposed in the second chamber, wherein the second lifting mechanism moves the printing module to print the first workpiece on the first table or the second workpiece on the second table.

In another embodiment, the dual-table vacuum printing apparatus with positionable table top of the present invention further comprises a reinforced lifting mechanism disposed in the second cavity, wherein the reinforced lifting mechanism is lifted and abutted against the center of the first table or the second table when the second lifting mechanism moves the printing module to print the first workpiece on the first table or the second workpiece on the second table.

In another embodiment, the table-positionable dual-table vacuum printing apparatus of the present invention further comprises an exhaust mechanism, which is communicated with the first feeding and discharging space or the second feeding and discharging space, and exhausts the air in the first feeding and discharging space or the second feeding and discharging space out of the first cavity.

According to the double-table vacuum printing method with the positionable table top and the printing device thereof, the first workbench module and the second workbench module are arranged in the first cavity and the second cavity, when one workbench module is used for carrying out material changing in the first cavity, the other workbench module is used for carrying out printing operation in the second cavity, and when the printing operation and the material changing operation are completed, the positions of the two workbench modules are interchanged, and the material changing operation and the printing operation are respectively carried out continuously. Therefore, the idle state is not generated during the vacuum printing operation and the material changing operation, and the productivity can be improved. In addition, by arranging the positioning piece on the first transmission mechanism, the second transmission mechanism and the first lifting mechanism, the first workbench and the second workbench can be fully positioned without overturning or skewing no matter the first transmission mechanism and the second transmission mechanism seat horizontally move or the first lifting mechanism seat vertically move, thereby influencing the printing yield and the airtight state of the material inlet and outlet. In addition, by providing the reinforced lifting mechanism, even if the span of the first workbench or the second workbench is increased, the central part is not depressed due to bending during printing.

Drawings

Fig. 1 is a cross-sectional view of a vacuum printing apparatus of the prior art.

Fig. 2 is a perspective view of one embodiment of a dual mesa vacuum printing apparatus of the present invention.

Fig. 3 is a cross-sectional view of a first embodiment of a dual mesa vacuum printing apparatus of the present invention.

Fig. 4A is a cross-sectional view of a second embodiment of a dual mesa vacuum printing apparatus of the present invention.

Fig. 4B is a perspective view of the drive mechanism of the dual-table vacuum printing apparatus of fig. 4A.

Fig. 4C is a perspective view of a first lift mechanism of the dual-table vacuum printing apparatus of fig. 4A.

Fig. 4D is a cross-sectional view of the dual mesa vacuum printing apparatus of fig. 4A.

FIG. 5 is a schematic diagram of a first stage module and a second stage module of the dual-stage vacuum printing apparatus of FIG. 4A.

Fig. 6 to 11 are schematic views showing an operation state of a second embodiment of the double-table vacuum printing apparatus of the present invention.

Fig. 12A is a flowchart of a first embodiment of the vacuum printing method of the present invention.

Fig. 12B is a front-end flow chart of a second embodiment of the vacuum printing method of the present invention.

Fig. 12C is a back-end flow chart of a second embodiment of the vacuum printing method of the present invention.

Description of the figure:

100: double-table vacuum printing device

10: first cavity body

11: cavity wall

12: feeding and discharging opening

13: flange

20: second cavity body

30: cavity door

31: sliding rail

40: printing module

50: first workbench module

51: first workbench

511: first concave part

52: first sealing member

521: first sealing positioning piece

53: first transmission mechanism

531: first positioning piece

532: first movable seat

533: first bearing plate

534: first connecting rod

535: first clamping piece

54: first belt driving mechanism

541: first horizontal positioning piece

60: second workbench module

61: second workbench

611: second concave part

62: second sealing member

621: second sealing positioning piece

63: second transmission mechanism

631: second positioning piece

632: second movable seat

633: second bearing plate

634: second connecting rod

635: second clamping piece

64: second belt driving mechanism

641: second horizontal positioning piece

70: first track

80: second track

91: first lifting mechanism

911: third positioning piece

912: lifting carrier plate

913: first servo motor

914: swing arm mechanism

92: second lifting mechanism

93: exhaust mechanism

94: reinforced jacking mechanism

941: reinforced plate

942: lifting rod

943: sliding block

944: lead screw

945: second servo motor

A1: first feeding and discharging space

A2: a second feeding and discharging space

C1: first cavity body

C2: second cavity body

D: sealing door

O: an opening

P1: first workpiece

P2: second workpiece

S1-S13: step (a)

S21-S32: step (a)

T: working table

W: a top wall.

Detailed Description

Referring to fig. 2, a perspective view of an embodiment of a dual-table vacuum printing apparatus according to the present invention is shown, wherein the dual-table vacuum printing apparatus is implemented by a dual-table vacuum printing apparatus with a positionable table. As shown in fig. 2, the table-top positionable dual-table vacuum printing apparatus 100 of the present invention comprises a first chamber 10 and a second chamber 20, wherein the first chamber 10 is connected to the second chamber 20. A cavity door 30 is provided at the cavity wall 11 of the first cavity 10, the cavity door 30 is slidably provided on a pair of slide rails 31, the cavity door 30 is opened or closed by sliding the cavity door 30 on the slide rails 31, and the cavity door 30 and the cavity wall 11 are airtight by a sealing member, for example, an O-ring is provided at the edge of the cavity door 30 and is pressed against the cavity wall 11 to form an airtight.

Referring to fig. 3, which is a cross-sectional view of a first embodiment of the dual-stage vacuum printing apparatus of the present invention, a first chamber 10 is in communication with a second chamber 20, and a printing module 40 is disposed in the second chamber 20. In addition, a material inlet and outlet opening 12 is provided on the cavity wall 11, and the cavity door 30 can close or open the material inlet and outlet opening 12, as mentioned above, the cavity door 30 and the cavity wall 11 are airtight by means of the sealing element, so that the cavity door 30 can hermetically close the material inlet and outlet opening 12. The first and

second chambers

10 and 20 are connected to each other, and a first table module 50 and a second table module 60 are provided inside the chambers. The first stage module 50 carries a first workpiece P1 and is movable between the first chamber 10 and the second chamber 20. The second stage module 60 carries a second workpiece P2 and is movable between the first chamber 10 and the second chamber 20.

The first table module 50 includes a first table 51 and a first sealing member 52, wherein the first table 51 is a flat carrier, which can carry the first workpiece P1, and the first sealing member 52 surrounds the first table 51. The first cavity 10 further has a flange 13, the flange 13 is disposed around the feeding and discharging opening 12, a first sealing positioning member 521 of the first sealing member 52 is abutted against the flange 13 by lifting the first table 51, so that the first sealing member 52, the first table 51, the flange 13 and the cavity door 30 form a first feeding and discharging space, the first feeding and discharging space and the first cavity 10 form an airtight with each other by the first sealing member 52, and the first feeding and discharging space is communicated with the outside of the first cavity 10 through the feeding and discharging opening 12, as mentioned above, the cavity door 30 can hermetically seal the feeding and discharging opening 12; wherein the first seal 52 is a seal plate.

Similarly, the second table module 60 includes a second table 61 and a second sealing member 62, the second table 61 carries the second workpiece P2, the second sealing member 62 surrounds the second table 61, the second sealing member 62 is a sealing plate, and the second sealing member 62 is abutted against the flange 13 by a second sealing positioning member 621, so that the second sealing member 62, the second table 61, the flange 13 and a second feeding and discharging space are formed, the second feeding and discharging space forms an airtight with the first cavity 10, and the second feeding and discharging space is communicated with the outside of the first cavity 10 through the feeding and discharging opening 12.

As shown in fig. 3, a first rail 70 and a second rail 80 are disposed inside the first cavity 10 and the second cavity 20, which are in communication, and the first rail 70 and the second rail 80 extend into the first cavity 10 and the second cavity 20. The first table module 50 can slide on the first rail 70 and reciprocate in the first chamber 10 and the second chamber 20 by guiding the first rail 70. The second table module 60 can slide on the second rail 80 and reciprocate in the first chamber 10 and the second chamber 20 by guiding the second rail 80. The height of the first rail 70 is different from the height of the second rail 80, thereby enabling the first table module 50 moving on the first rail 70 not to interfere with the second table module 60 moving on the second rail 80. In the present embodiment, the height of the first rail 70 is greater than the height of the second rail 80, and the width of the first rail 70 is also greater than the width of the second rail 80, so the second rail 80 is disposed within the first rail 70.

Referring to fig. 4A and 5, a cross-sectional view of a second embodiment of the dual-stage vacuum printing apparatus and schematic diagrams of the first stage module and the second stage module according to the present invention are shown, wherein the first stage module 50 includes a first stage 51 and a first sealing member 52, the first stage 51 is a flat stage, which can carry the first workpiece P1, and the first sealing member 52 surrounds the first stage 51. The first cavity 10 further has a flange 13, the flange 13 is disposed around the inlet and outlet opening 12, and a first sealing positioning member 521 of the first sealing member 52 is abutted against the flange 13 by lifting the first table 51, so that the first sealing member 52, the first table 51, the flange 13 and the cavity door 30 form a first inlet and outlet space A1 (refer to fig. 9), the first inlet and outlet space A1 and the first cavity 10 form an airtight seal by the first sealing member 52, and the first inlet and outlet space A1 is communicated with the outside of the first cavity 10 through the inlet and outlet opening 12, as mentioned above, the cavity door 30 can hermetically seal the inlet and outlet opening 12.

Similarly, the second table module 60 includes a second table 61 and a second sealing member 62, the second table 61 carries the second workpiece P2, the second sealing member 62 surrounds the second table 61, the second sealing member 62 is a sealing plate, and the second sealing member 62 is abutted against the flange 13 by a second sealing positioning member 621, so that the second sealing member 62, the second table 61, the flange 13 and a second feeding and discharging space A2 are formed (see fig. 6), the second feeding and discharging space A2 and the first cavity 10 form an airtight, and the second feeding and discharging space A2 is communicated with the outside of the first cavity 10 through the feeding and discharging opening 12.

Referring back to fig. 5, since the width of the first rail 70 is greater than the width of the second rail 80, the width of the first table 51 is also greater than the width of the second table 61 in cooperation with the width of the first rail 70. Since the same printing process is performed at the printing module 40, the first workpiece P1 and the second workpiece P2 may be the same workpiece. The widths of the first work table 51 and the second work table 61 are larger than those of the first work P1 and the second work P2, so that the first work P1 and the second work P2 can be carried smoothly. The first table 51 and the second table 61 are driven by the first belt driving mechanism 54 and the second belt driving mechanism 64 to move back and forth on the first rail 70 and the second rail 80, respectively. As shown in fig. 4A, the first belt driving mechanism 54 of the first table 51 and the second belt driving mechanism 64 of the second table 61 may include driving motors and belts, and in an embodiment of the present invention, the first belt driving mechanism 54 and the second belt driving mechanism 64 respectively move back and forth on the first rail 70 and the second rail 80, and the first transmission mechanism 53 and the second transmission mechanism 63 are precisely positioned when moving horizontally through the first horizontal positioning member 541 and the second horizontal positioning member 641, so as to facilitate the vertical lifting and sealing by the subsequent first lifting mechanism 91; wherein the first horizontal positioning member 541 and the second horizontal positioning member 641 are magnets.

Referring to fig. 4B, and referring to fig. 4A, the first table module 50 further includes a first transmission mechanism 53, where the first transmission mechanism 53 includes a plurality of first positioning members 531 and a first moving seat 532, and the first moving seat 532 is disposed on the first rail 70 and can move between the first cavity 10 and the second cavity 20 on the first rail 70. The first moving seat 532 includes two first carrying plates 533 and a first connecting rod 534 connected to the two first carrying plates 533, the two first connecting rods 534 are respectively disposed at ends of the two first carrying plates 533, the two first carrying plates 533 are respectively slidably engaged with the first rail 70 by a plurality of first engaging members 535 fixed at bottoms thereof, and the first positioning members 531 are disposed on the two first carrying plates 533, in this embodiment, each first carrying plate 533 has two first positioning members 531. In the present embodiment, the first positioning member 531 is a protrusion disposed on the top surface of the first supporting plate 533, and the bottom of the first table 51 is provided with a first recess 511 (see fig. 5) corresponding to the first positioning member 531. When the first table 51 is placed on the first transmission mechanism 53, the first table 51 is supported on the two first supporting plates 533, and the first recess 511 (see fig. 5) of the first table 51 is combined with the first positioning member 531 provided on the first supporting plate 533, so that when the first supporting plate 533 moves on the first rail 70, the first table 51 can be stably positioned on the first supporting plate 533 without overturning or separating from the first supporting plate 533. Wherein the first positioning member 531 and the first concave portion 511 are tapered positioning pins.

Similarly, as shown in fig. 4A and 4B, the second table module 60 further includes a second transmission mechanism 63, and the second transmission mechanism 63 includes a plurality of second positioning members 631 and a second moving seat 632, wherein the second moving seat 632 is disposed on the second track 80 and is movable on the second track 80 between the first cavity 10 and the second cavity 20. The second moving seat 632 includes two second carrying plates 633 and second connecting rods 634 connected to the two second carrying plates 633, the two second connecting rods 634 are respectively disposed at ends of the two second carrying plates 633, the two second carrying plates 633 are slidably engaged with the second rails 80 by a plurality of second engaging members 635 fixed at bottoms thereof, and the second positioning members 631 are disposed on the two second carrying plates 633, in this embodiment, each second carrying plate 633 has two second positioning members 631. In the present embodiment, the second positioning member 631 is a protrusion disposed on the top surface of the second supporting plate 633, and the bottom of the second table 61 is provided with a second recess 611 (see fig. 5) corresponding to the second positioning member 631. When the second table 61 is placed on the second transmission mechanism 63, the second table 61 is supported on the two second supporting plates 633, and the second concave portion 611 (refer to fig. 5) of the second table 61 is coupled to the second positioning member 631 provided on the second supporting plate 633, whereby the second table 61 can be stably positioned on the second supporting plate 633 without being overturned or separated from the second supporting plate 633 when the second supporting plate 633 is moved on the second rail 80. Wherein the second positioning member 631 and the second recess 611 are tapered positioning pins.

Referring back to fig. 4A, the table-positionable dual-table vacuum printing apparatus 100 of the present invention further includes a first lifting mechanism 91. The first lifting mechanism 91 is disposed in the first cavity 10 and corresponds to the feeding and discharging opening 12, and the first lifting mechanism 91 lifts the first table 51 or the second table 61, and contacts the flange 13 via a first sealing positioning member 521 or a second sealing positioning member 621, or lowers the first table 51 to the first rail 70 or lowers the second table 61 to the second rail 80. The table-positionable dual-table vacuum printing apparatus 100 of the present invention further comprises a second lifting mechanism 92 disposed in the second chamber 20, wherein the second lifting mechanism 92 moves the printing module 40 to print the first workpiece P1 on the first table 51 or the second workpiece P2 on the second table 61. The dual-table vacuum printing apparatus 100 with positionable table top of the present invention further comprises an exhaust mechanism 93, wherein the exhaust mechanism 93 is communicated with the first feeding and discharging space A1 or the second feeding and discharging space A2 of the first cavity 10, and exhausts the air in the first feeding and discharging space A1 or the second feeding and discharging space A2 out of the first cavity 10. In addition, the exhaust mechanism 93 is also connected to the second cavity 20, so that the first feeding and discharging space A1 or the second feeding and discharging space A2 can be exhausted, and the vacuum degree in the first feeding and discharging space A1 or the second feeding and discharging space A2 can be kept consistent with the second cavity 20.

Referring back to fig. 4C, the first lifting mechanism 91 includes a plurality of third positioning elements 911 and a lifting carrier 912, the first lifting mechanism 91 further includes a first servo motor 913 and a swing arm mechanism 914, the lifting carrier 912 is connected to the swing arm mechanism 914, the first servo motor 913 rotates to drive the swing arm mechanism 914 to lift or lower the lifting carrier 912, and the third positioning elements 911 are disposed on the lifting carrier 912. In this embodiment, the third positioning members 911 are protrusions disposed on the top surface of the lifting carrier 912, and two third positioning members 911 are disposed on each side of the lifting carrier 912. A third recess (not shown) is provided in the first table 51, wherein the positions of the first recess 511 and the third recess correspond to the third positioning member 911. When the first transmission mechanism 53 carries the first table 51 to move to the first cavity 10 and corresponds to the feeding and discharging opening 12, the first servo motor 913 rotates to drive the swing arm mechanism 914 to lift the lifting carrier 912, so that the third positioning member 911 is combined with the first concave portion 511 and the third concave portion of the first table 51, and the first table 51 can be kept positioned on the lifting carrier 912 during the lifting or lowering process of the first table 51 by the first lifting mechanism 91. Similarly, a fourth recess (not shown) is provided in the second table 61, wherein the positions of the second recess 611 and the fourth recess correspond to the third positioning member 911. The first servo motor 913 rotates to drive the swing arm mechanism 914 to lift the lifting carrier 912, and the third positioning member 911 is coupled to the second recess 611 and the fourth recess of the second table 61, so that the first table 51 can be kept positioned on the lifting carrier 912 during the lifting or lowering of the first table 51 by the first lifting mechanism 91.

Referring to fig. 4D, since the table-positionable dual-table vacuum printing apparatus of the present invention includes the first table 51 and the second table 61, in order to enable the first elevating mechanism 91 to raise and lower both the first table 51 and the second table 61, the span of the first rail 70 is larger than that of the second rail 80, thereby allowing the elevating carrier 912 of the first elevating mechanism 91 to pass, but since the span of the first rail 70 is larger, when the printing module 40 prints on the first workpiece P1 carried by the first table 51, the first table 51 is easily bent to cause the middle portion to sag, resulting in poor printing yield. The table-positionable dual-table vacuum printing apparatus further comprises a reinforced lifting mechanism 94 disposed in the second cavity 20, wherein the reinforced lifting mechanism 94 is raised and abutted against the center of the first table 51 or the second table 61 when the second lifting mechanism 92 moves the printing module 40 to print the first workpiece P1 on the first table 51 or the second workpiece P2 on the second table 61. Thereby preventing the first table 51 or the second table 61 from being bent, and thus improving the printing yield. The enhanced jacking mechanism 94 includes an enhanced plate 941, a lifter 942, a slider 943, a lead screw 944, and a second servo motor 945. The second servo motor 945 rotates the lead screw 944, and rotation of the lead screw 944 moves the slider 943 along the lead screw 944 and pushes the lifter 942 to move up and down, so that the end of the lifter 942 is connected to the reinforcement plate 941, and the reinforcement plate 941 contacts the center of the first table 51 or the second table 61 as the lifter 942 is lifted and lowered.

Referring to fig. 2 and 3, a first embodiment of the vacuum printing method of the present invention will be described with reference to fig. 12A.

As shown in fig. 12A, first, in step S21, the table-top positionable dual-table vacuum printing apparatus 100 described above is provided, and then, the process proceeds to step S22. In step S22, the second stage 61 is moved to the first chamber 10 corresponding to the feeding/discharging opening 12, and the first stage 51 is moved to the printing module 40, and then step S23 is performed. In step S23, the second lifting mechanism 92 moves the printing module 40 down to perform the printing process on the first workpiece P1 carried by the first table 51, and then proceeds to step S24. In step S24, the first elevating mechanism 91 elevates the second table 61 and the second seal positioning piece 621 abuts on the flange 13, thereby forming the airtight second inlet/outlet space A2. Then, the process advances to step S25. In addition, the first table module 50 or the second table module 60 can lift the first lifting mechanism 91, wherein in step S24, the second table 61 is connected to the first lifting mechanism 91, so that when the first lifting mechanism 91 is lifted to a sealing position at the second preparation position (not shown), a second sealing positioning piece 621 of the second table 61 is abutted against the flange 13 to form an airtight second feeding and discharging space A2, thereby performing a refueling operation. In step S25, external air is introduced into the second feeding and discharging space A2 until the air pressure in the second feeding and discharging space A2 is the same as the external air pressure, and then the chamber door 30 is opened and the second work P2 carried by the second table 61 is replaced. Then, the process advances to step S26. In step S26, the second feeding and discharging space A2 is exhausted until the air pressure of the second feeding and discharging space A2 is the same as that of the second chamber 20, and then the second table 61 is lowered, at this time, if the first table 51 has not completed the printing process, the second table 61 waits on the second rail 80 until the first table 51 completes the printing process. In another embodiment, the printing time of the second chamber 20 is greater than or equal to the reloading time of the first chamber 10. Furthermore, in another embodiment, the dual mesa vacuum printing method further comprises the steps of: the first lifting mechanism 91 is used for lifting and lowering the first workbench 51 or the second workbench 61, so that a first feeding and discharging space or a second feeding and discharging space can be formed by abutting the sealing element on the flange, and the vacuum pumping and breaking operations can be achieved by lifting and lowering the first lifting mechanism 91. Then, the process advances to step S27. In step S27, the first stage 51 is moved to the first chamber 10 and corresponds to the feed/discharge opening 12, while the second stage 61 is moved to the second chamber 20 and corresponds to the printing module 40. Then, the process proceeds to step S28. In step S28, the second elevating mechanism 92 lowers the printing module 40 to print the second workpiece P2 carried by the second table 61. Then, the process advances to step S29. In step S29, the first elevating mechanism 91 brings the first table 51 and the first seal 52 into contact with the flange 13 to form a first inlet/outlet space A1. Then, the process proceeds to step S30. Furthermore, the first table module 50 or the second table module 60 can lift the first lifting mechanism 91, wherein, when the first table 51 is connected to the first lifting mechanism 91 in step S29, the first table 51 is made to abut against the flange 13 to form an airtight first feeding/discharging space A1 when lifted to a sealing position at the first preparation position (not shown) by the first lifting mechanism 91, thereby performing a refueling operation. In step S30, outside air is made to enter the first feeding and discharging space A1 until the air pressure of the first feeding and discharging space A1 is the same as the outside atmospheric pressure, then the cavity door 30 is opened, and the first work P1 carried by the first table 51 is replaced. Then, the process proceeds to step S31. In step S31, the first feeding and discharging space A1 is exhausted until the air pressure of the first feeding and discharging space A1 is the same as that of the second chamber 20, and then the first table 51 is lowered, at this time, if the second table 61 has not completed the printing process, the first table 51 waits on the first rail 70 until the second table 61 completes the printing process. Then, the process proceeds to step S32. In step S32, it is determined whether to continue the printing process on the first workpiece P1 or the second workpiece P2, and if not, the whole process is ended. If the printing process is continued, as shown in fig. 12A, the process returns to step S32, and the second stage 61 is moved to the first chamber 10 corresponding to the feeding/discharging opening 12, and the first stage 51 is moved to the printing module 40. Steps S23 to S32 are then repeated.

Referring next to fig. 6 to 11, a second embodiment of the vacuum printing method of the present invention is described with reference to fig. 12B and 12C.

As shown in fig. 12B, first, in step S1, the table-top positionable dual-table vacuum printing apparatus 100 described above is provided, and then, the process proceeds to step S2.

As shown in fig. 4A, a first table 51 is positioned at a first transmission mechanism 53, while a second table 61 is positioned at a second transmission mechanism 63; then, the process proceeds to step S3.

As shown in fig. 6, in step S3, the second driving mechanism 63 is made to move the second table 61 to the first cavity 10 corresponding to the feeding and discharging opening 12, and the first driving mechanism 53 is made to move the first table 51 to the printing module 40, and then step S4 is performed.

As shown in fig. 6, in step S4, the second lifting mechanism 92 moves the printing module 40 down to perform the printing process on the first workpiece P1 carried by the first table 51, and then proceeds to step S5.

As shown in fig. 6, in step S5, the second table 61 is positioned on the first elevating mechanism 91, and the first elevating mechanism 91 is raised to raise the second table 61 to contact the flange 13, thereby forming the airtight second feeding/discharging space A2. Then, the process proceeds to step S6. Furthermore, the first table module 50 or the second table module 60 can lift the first lifting mechanism 91, wherein in step S5, the second table 61 is connected to the first lifting mechanism 91, so that when the first lifting mechanism 91 is lifted to a sealing position at the second preparation position (not shown), the second table 61 is abutted against the flange 13 to form an airtight second feeding and discharging space A2, thereby performing a refueling operation.

As shown in fig. 6, in step S6, outside air is introduced into the second feeding and discharging space A2 until the air pressure of the second feeding and discharging space A2 is the same as the outside air pressure, then the chamber door 30 is opened, and the second work P2 carried by the second table 61 is replaced. Then, the process proceeds to step S6.

As shown in fig. 6 and 7, in step S7, the second feeding and discharging space A2 is exhausted until the air pressure of the second feeding and discharging space A2 is the same as that of the second chamber 20, and then the second work table 61 is lowered to carry the second work P2, at this time, if the first work table 51 has not completed the printing process, the second work table 61 waits on the second rail 80 until the first work P1 of the first work table 51 completes the printing process. In another embodiment, the printing time of the second chamber 20 is greater than or equal to the reloading time of the first chamber 10. Furthermore, in another embodiment, the mesa positionable dual mesa vacuum printing method further comprises the steps of: the first lifting mechanism 91 is used for lifting and lowering the first workbench 51 or the second workbench 61, so that a first feeding and discharging space or a second feeding and discharging space can be formed by abutting the sealing element on the flange, and the vacuum pumping and breaking operations can be achieved by lifting and lowering the first lifting mechanism 91. Then, the process proceeds to step S7.

As shown in fig. 8 and 12C, in step S8, the first stage 51 is moved to the first chamber 10 and corresponds to the feed/discharge opening 12, and the second stage 61 is moved to the second chamber 20 and corresponds to the printing module 40. Then, the process proceeds to step S9.

As shown in fig. 9 and 12C, in step S9, the second elevating mechanism 92 lowers the printing module 40 to print the second workpiece P2 carried on the second table 61. Then, the process proceeds to step S10.

As shown in fig. 9 and 12C, in step S10, the first table 51 is positioned on the first elevating mechanism 91, and the first elevating mechanism 91 is elevated to bring the first table 51 and the first seal 52 into contact with the flange 13, thereby forming the first inlet/outlet space A1. Then, the process proceeds to step S10. Furthermore, the first table module 50 or the second table module 60 can lift the first lifting mechanism 91, wherein, when the first table 51 is connected to the first lifting mechanism 91 in step S10, the first table 51 is lifted to a sealing position at the first preparation position (not shown) by the first lifting mechanism 91, and the first table 51 is abutted against the flange 13 to form an airtight first feeding/discharging space A1, thereby performing a refueling operation.

As shown in fig. 9 and 12B, in step S11, outside air is introduced into the first feeding and discharging space A1 until the air pressure in the first feeding and discharging space A1 is the same as the outside air pressure, and then the chamber door 30 is opened and the first work P1 carried by the first table 51 is replaced. Then, the process proceeds to step S12.

As shown in fig. 9, 10 and 12C, in step S12, the first feeding and discharging space A1 is exhausted until the air pressure of the first feeding and discharging space A1 is the same as that of the second chamber 20, and then the first table 51 is lowered, at this time, if the second table 61 has not completed the printing process, the first table 51 waits on the first rail 70 until the second table 61 completes the printing process. Then, the process proceeds to step S13.

In step S13, it is determined whether to continue the printing process on the first workpiece P1 or the second workpiece P2, and if not, the whole process is ended. If the printing process is continued, as shown in fig. 11, the process returns to step S2, and the second stage 61 is moved to the first chamber 10 corresponding to the feed/discharge opening 12, and the first stage 51 is moved to the printing module 40. Steps S4 to S13 are then repeated.

According to the double-table vacuum printing method and the printing device with the positionable table tops, the first workbench module and the second workbench module are arranged in the first cavity and the second cavity, when one workbench module is used for carrying out material changing in the first cavity, the other workbench module is used for carrying out printing operation in the second cavity, and when the printing operation and the material changing operation are completed, the positions of the two workbench modules are interchanged, and the material changing operation and the printing operation are respectively carried out continuously. Therefore, the printing operation and the material changing operation do not have an idle state, and the productivity can be improved. In addition, by arranging the positioning piece on the first transmission mechanism, the second transmission mechanism and the first lifting mechanism, the first workbench and the second workbench can be fully positioned without overturning or skewing no matter the first transmission mechanism and the second transmission mechanism seat horizontally move or the first lifting mechanism seat vertically move, thereby influencing the printing yield and the airtight state of the material inlet and outlet. In addition, by providing the reinforced lifting mechanism, even if the span of the first workbench or the second workbench is increased, the central part is not depressed due to bending during printing.

However, the foregoing description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, i.e., the invention is not limited to the specific embodiments described herein, but is to be accorded the full scope of the claims and the equivalents thereof. Furthermore, no single embodiment or claim of the invention is intended to achieve all of the objects, advantages or features disclosed herein. Furthermore, the abstract sections and headings are for use only in assisting patent document searching and are not intended to limit the scope of the claims. Furthermore, references to "first," "second," and the like in the description or in the claims are used for naming the elements or distinguishing between different embodiments or ranges, and are not intended to limit the upper or lower limit on the number of elements.

Claims

1. A twin table vacuum printing apparatus (100), comprising:

a first chamber (10) having a chamber wall (11), wherein the chamber wall (11) is provided with a feed-in and feed-out opening (12);

a chamber door (30) for hermetically closing the inlet and outlet opening (12);

a second cavity (20) communicating with the first cavity (10);

a printing module (40) disposed in the second cavity (20);

A first table module (50) carrying a first workpiece (P1) and being movable between the first chamber (10) and the second chamber (20); and

a second table module (60) comprising a second table (61), a second seal (62) carrying a second workpiece (P2) and being movable between the first chamber (10) and the second chamber (20);

wherein when the first stage module (50) moves to the first chamber (10) and the first workpiece (P1) is moved out through the chamber door (30), the second stage module (60) moves to the second chamber (20) and the printing module (40) prints the second workpiece (P2);

the first workbench module (50) comprises a first workbench (51) and a first sealing element (52), the first workbench (51) is used for bearing the first workpiece (P1), the first sealing element (52) surrounds the first workbench (51), the first cavity (10) is provided with a flange (13), the flange (13) is arranged around the feeding and discharging opening (12), the first sealing element (52) can be abutted against the flange (13), so that a first feeding and discharging space (A1) is formed by the first sealing element (52), the first workbench (51) and the flange (13), the first feeding and discharging space (A1) and the first cavity (10) form airtight, and the first feeding and discharging space (A1) is communicated with the outside of the first cavity (10) through the feeding and discharging opening (12);

Wherein the second workbench (61) and the flange (13) form a second feeding and discharging space (A2);

the dual-table vacuum printing device (100) comprises a first rail (70), wherein the first rail (70) is arranged in the first cavity (10) and the second cavity (20), the first workbench (51) is movably arranged in the first rail (70) and guided by the first rail (70) to reciprocate in the first cavity (10) and the second cavity (20);

wherein the dual-mesa vacuum printing apparatus (100) is a dual-mesa vacuum printing method comprising at least the steps of:

providing the dual mesa vacuum printing apparatus (100);

moving the second workbench (61) to the first cavity (10) and corresponding to the feeding and discharging opening (12), and simultaneously moving the first workbench (51) to the second cavity (20) and corresponding to the printing module (40);

printing the first workpiece (P1) carried by the first workbench (51) by the printing module (40);

when the first workpiece (P1) is printed, the second workbench (61) enables the second sealing piece (62) to be abutted against the flange (13) to form the second feeding and discharging space (A2);

-putting the second feeding and discharging space (A2) in communication with the external atmosphere, then opening the chamber door (30) and replacing the second workpiece (P2);

Exhausting the second feeding and discharging space (A2) until the air pressure of the second feeding and discharging space (A2) is the same as that of the second cavity (20), and then lowering the second workbench (61);

after the first workpiece (P1) finishes printing, the first workbench (51) is moved to the first cavity (10) and corresponds to the feeding and discharging opening (12), and the second workbench (61) is moved to the printing module (40);

printing the second workpiece (P2) carried by the second workbench (61) by the printing module (40);

when the second workpiece (P2) is printed, the first workbench (51) and the first sealing element are abutted against the flange (13) to form the first feeding and discharging space (A1);

-putting the first feeding and discharging space (A1) in communication with the external atmosphere, then opening the cavity door (30) and replacing the first workpiece (P1); and

the first feeding and discharging space (A1) is exhausted until the air pressure of the first feeding and discharging space (A1) is the same as that of the second cavity (20), and then the first workbench (51) is lowered.

2. The dual mesa vacuum printing device (100) of claim 1, wherein the printing time of the second cavity (20) is greater than or equal to the reloading time of the first cavity (10).

3. The dual-table vacuum printing apparatus (100) of claim 1 or 2, wherein a first lifting mechanism (91) is configured to lift the first table (51) and the second table (61) respectively.

4. The twin table vacuum printing apparatus (100) according to claim 1, wherein the second table module (60) comprises the second table (61) and the second sealing member (62), the second table (61) carries the second workpiece (P2), the second sealing member (62) surrounds the second table (61), the second sealing member (62) is abutted against the flange (13), the second sealing member (62), the second table (61) and the flange (13) form the second feeding and discharging space (A2), the second feeding and discharging space (A2) forms an airtight seal with the first cavity (10), and the second feeding and discharging space (A2) is communicated with the outside of the first cavity (10) through the feeding and discharging opening (12); the dual-table vacuum printing device (100) comprises a second track (80), wherein the second track (80) is arranged in the first cavity (10) and the second cavity (20), and the second workbench (61) is movably arranged in the second track (80) and guided by the second track (80) to reciprocate in the first cavity (10) and the second cavity (20).

5. The dual platen vacuum printing apparatus (100) of claim 4, wherein the first rail (70) is different from the second rail (80) in height such that the first table (51) moving on the first rail (70) does not interfere with the second table (61) moving on the second rail (80).

6. The dual-table vacuum printing apparatus (100) of claim 4 or 5, comprising a first lifting mechanism (91) disposed in the first chamber (10) and corresponding to the feed/discharge opening (12), wherein the first lifting mechanism (91) lifts the first table (51) or the second table (61) to abut against the flange (13) or lowers the first table (51) to the first rail (70) or lowers the second table (61) to the second rail (80).

7. The dual platen vacuum printing apparatus (100) of claim 6, comprising a second lift mechanism (92) disposed in the second chamber (20), the second lift mechanism (92) moving the printing module (40) to print the first workpiece (P1) on the first table (51) or the second workpiece (P2) on the second table (61).

8. The dual platen vacuum printing apparatus (100) of claim 6, comprising an exhaust mechanism (93), the exhaust mechanism (93) being in communication with the first inlet and outlet space (A1) or the second inlet and outlet space (A2) to exhaust air from the first chamber (10) in the first inlet and outlet space (A1) or the second inlet and outlet space (A2).

9. A dual-table vacuum printing apparatus with positionable table top, comprising at least:

a chamber door (30) for hermetically closing the inlet and outlet opening (12);

a second cavity (20) communicating with the first cavity (10);

a printing module (40) disposed in the second cavity (20);

a first table module (50) comprising a first table (51) and a first transmission mechanism (53), the first table (51) carrying a first workpiece (P1), and the first transmission mechanism (53) carrying the first table (51) for moving between the first cavity (10) and the second cavity (20), the first transmission mechanism (53) comprising a plurality of first positioning members (531), the first table (51) being positioned on the first transmission mechanism (53) by the plurality of first positioning members (531); and

a second table module (60) comprising a second table (61), a second sealing member (62) and a second transmission mechanism (63), wherein the second table (61) carries a second workpiece (P2), and the second transmission mechanism (63) carries the second table (61) to move in the first chamber (10) and the second chamber (20), the second transmission mechanism (63) comprises a plurality of second positioning members (631), and the second table (61) is positioned in the second transmission mechanism (63) by the plurality of second positioning members (631);

A first lifting mechanism (91) for lifting and lowering the first workbench (51) and the second workbench (61) respectively;

wherein when the first table module (50) and the second table module (60) move between the first chamber (10) and the second chamber (20), the plurality of first positioning members (531) position the first table (51) on the first transmission mechanism (53), and the plurality of second positioning members (631) position the second table (61) on the second transmission mechanism (63);

the first workbench module (50) comprises a first sealing element (52), the first sealing element (52) surrounds the first workbench (51), the first cavity (10) is provided with a flange (13), the flange (13) is arranged around the feeding and discharging opening (12), the first sealing element (52) can be abutted against the flange (13), the first sealing element (52), the first workbench (51) and the flange (13) form a first feeding and discharging space (A1), the first feeding and discharging space (A1) and the first cavity (10) form airtight, and the first feeding and discharging space (A1) is communicated with the outside of the first cavity (10) through the feeding and discharging opening (12);

The double-table vacuum printing device with the positionable table top comprises a first rail (70), wherein the first rail (70) is arranged in the first cavity (10) and the second cavity (20), the first workbench (51) is movably arranged in the first rail (70) and guided by the first rail (70) to reciprocate in the first cavity (10) and the second cavity (20);

wherein the mesa positionable twin mesa vacuum printing apparatus is a mesa positionable twin mesa vacuum printing method comprising at least the steps of:

providing a double-table vacuum printing device with a positionable table top;

positioning the first table (51) at the first transmission mechanism (53) while positioning the second table (61) at the second transmission mechanism (63);

the second transmission mechanism (63) moves the second workbench (61) to the first cavity (10) and corresponds to the feeding and discharging opening (12), and meanwhile, the first transmission mechanism (53) moves the first workbench (51) to the second cavity (20) and corresponds to the printing module (40);

when the first workpiece (P1) is printed, the second workbench (61) is positioned on the first lifting mechanism (91), the first lifting mechanism (91) is lifted, and the second sealing piece (62) is abutted against the flange to form a second feeding and discharging space (A2);

when the second workpiece (P2) is printed, the first workbench (51) is positioned on the first lifting mechanism (91), the first lifting mechanism (91) is lifted, and the first sealing piece (52) is abutted against the flange to form the first feeding and discharging space (A1);

10. The table positionable twin table vacuum printing apparatus of claim 9, wherein the printing time of the second chamber (20) is greater than or equal to the reloading time of the first chamber (10).

11. The table-positionable twin table vacuum printing apparatus according to claim 9 or 10, wherein the first lifting mechanism is adapted to lift and lower the first table (51) and the second table (61), respectively; and

when the first work (P1) or the second work (P2) is printed, the center of the first work (51) or the center of the second work (61) is supported, and the first work (51) or the second work (61) is prevented from bending deformation.

12. The table positionable twin table vacuum printing apparatus according to claim 9, wherein the second table module (60) comprises the second seal (62), the second seal (62) surrounding the second table (61), the second seal (62) being abuttable against the flange (13), such that the second seal (62), the second table (61) and the flange (13) form the second feed-out space (A2), the second feed-out space (A2) forming an airtight seal with the first cavity (10), the second feed-out space (A2) being in communication with the outside of the first cavity (10) via the feed-in and feed-out opening (12); the table-board positionable double-table-board vacuum printing device (100) comprises a second rail (80), wherein the second rail (80) is arranged in the first cavity (10) and the second cavity (20), and the second workbench (61) is movably arranged in the second rail (80) and guided by the second rail (80) to reciprocate in the first cavity (10) and the second cavity (20).

13. The table positionable twin table vacuum printing apparatus of claim 12, wherein the first rail (70) is of a different height than the second rail (80) such that the first table (51) moving on the first rail (70) does not interfere with the second table (61) moving on the second rail (80).

14. The table top positionable dual table top vacuum printing apparatus of claim 12 or 13, comprising the first lifting mechanism (91) disposed in the first cavity (10) and corresponding to the feed-out opening (12), the first lifting mechanism (91) raising the first table (51) or the second table (61) against the flange (13) or lowering the first table (51) to the first rail (70) or lowering the second table (61) to the second rail (80), the first lifting mechanism (91) comprising a plurality of third positioning members (911), the plurality of third positioning members (911) positioning the first table (51) or the second table (61) on the first lifting mechanism (91) when the first lifting mechanism (91) raises or lowers the first table (51) or the second table (61).

15. The table positionable twin table vacuum printing apparatus of claim 14, comprising a second lifting mechanism (92) disposed in the second chamber (20), the second lifting mechanism (92) moving the printing module (40) to print the first workpiece (P1) on the first table (51) or the second workpiece (P2) on the second table (61).

16. The table-positionable twin table vacuum printing apparatus of claim 15, comprising a reinforced jacking mechanism (94) disposed in the second chamber (20), wherein the reinforced jacking mechanism (94) is raised and abuts against the center of the first table (51) or the second table (61) when the second lifting mechanism (92) moves the printing module (40) to print the first workpiece (P1) on the first table (51) or the second workpiece (P2) on the second table (61).

17. The table positionable twin table vacuum printing apparatus according to claim 15, comprising an exhaust mechanism (93), the exhaust mechanism (93) being in communication with the first inlet and outlet space (A1) or the second inlet and outlet space (A2) for exhausting air from the first inlet and outlet space (A1) or the second inlet and outlet space (A2) out of the first chamber (10).