A vacuum press device

Abstract

The application relates to a vacuum pressing equipment, belonging to the technical field of photovoltaic equipment, which comprises a box body, a supporting frame for bearing a screen plate is arranged in the box body, an upper heating plate for heating the screen plate is arranged on the upper side of the supporting frame, a lower heating plate for heating the screen plate is arranged on the lower side of the supporting frame, and a vacuum pump for providing vacuum in the box body is connected to one side of the box body. The application has the effect of reducing the phenomenon of air bubbles existing in the adhesion between a polyimide film and a screen plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic devices, in particular to a vacuum pressing equipment. BACKGROUND

[0002] Screen printing refers to using a silk screen as a plate base and making a screen plate with graphics through a photosensitive plate making method. Screen printing is composed of five elements, namely, a screen plate, a squeegee, a paste, a printing table and a printing material. It is printed by using the basic principle that the screen holes of the graphic part of the screen plate can pass ink, and the screen holes of the non-graphic part cannot pass ink.

[0003] The screen plate is mainly composed of a screen frame, a polyester screen, an emulsion or a yellow film, a pattern and a silk screen. In the manufacturing process of the screen plate, in order to avoid the paste flowing from the metal screen in the non-pattern area, a polyimide film is usually glued on the metal screen plate to block the tin liquid and improve the printing accuracy. Usually, a pressing machine is used to press the polyimide film onto the metal screen. However, in the actual pressing process, air bubbles are easily formed between the polyimide film and the metal screen, which causes the polyimide film to wrinkle and affects the quality of the screen plate. SUMMARY

[0004] In order to reduce the phenomenon of air bubbles existing between the polyimide film and the screen plate, the present application provides a vacuum pressing equipment.

[0005] The vacuum pressing equipment provided by the present application adopts the following technical scheme:

[0006] A vacuum pressing equipment, comprising a box body, a support frame for carrying a screen plate is arranged inside the box body, an upper heating plate for heating the screen plate is arranged on the upper side of the support frame, a lower heating plate for heating the screen plate is arranged on the lower side of the support frame, and a vacuum pump for providing vacuum in the box body is connected to one side of the box body.

[0007] By adopting the above technical scheme, when the polyimide film needs to be attached to the screen plate, the polyimide film is placed on the upper side of the screen plate, and then the upper heating plate and the lower heating plate are used to heat and press the screen plate and the polyimide film placed thereon, while the vacuum pump is started to adsorb the air between the screen plate and the polyimide film, thereby reducing the air bubbles between the polyimide film and the screen plate and improving the bonding quality between the polyimide film and the screen plate.

[0008] Optionally, a positioning assembly capable of positioning the polyimide film placed on the screen plate is connected inside the box body, a gas cylinder for driving the lower heating plate to move is connected to the lower side of the lower heating plate, and the lower heating plate is connected with the positioning assembly and can drive the positioning assembly to move.

[0009] By adopting the technical scheme, since the positioning assembly is arranged and linked with the lower heating plate, the lower heating plate drives the positioning assembly to move the polyimide film on the upper side of the screen plate to a proper position in the process of moving of the cylinder, thereby reducing the phenomenon of poor bonding effect of the screen plate and the polyimide film due to the position deviation of the polyimide film.

[0010] Optionally, the positioning assembly comprises a plurality of positioning push plates, and each positioning push plate can abut against the polyimide film on the upper side of the screen plate in the process of moving, thereby achieving the positioning process of the polyimide film on the upper side of the screen plate.

[0011] By adopting the technical scheme, the lower heating plate drives the plurality of positioning push plates to move in the process of moving of the lower heating plate, and the plurality of positioning push plates move the polyimide film on the upper side of the screen plate to a proper position in the process of moving, thereby reducing the phenomenon of poor bonding quality of the polyimide film on the screen plate due to the position deviation of the polyimide film and the screen plate.

[0012] Optionally, each positioning push plate is fixedly connected with a positioning screw rod near one side of the inner wall of the box, each positioning screw rod is slidably sleeved with a positioning sleeve on the outer side of the positioning screw rod along the length direction of the positioning screw rod, one end of each positioning screw rod in the positioning sleeve is fixedly connected with a positioning displacement block for limiting the rotation of the positioning screw rod, and the outer side of each positioning screw rod is further threadedly sleeved with a positioning gear, one side of each positioning gear is engaged with a driving rack, and each driving rack is fixedly connected with the lower heating plate.

[0013] By adopting the technical scheme, the lower heating plate drives the plurality of driving racks to move in the process of moving of the lower heating plate, each driving rack drives the engaged positioning gear to rotate in the process of moving, each positioning gear drives the connected positioning screw rod to reciprocate in the process of rotating, and the positioning screw rod drives the connected positioning push plate to reciprocate in the process of reciprocating, thereby achieving the position adjustment process of the polyimide film on the upper side of the screen plate by the plurality of positioning push plates.

[0014] Optionally, one side of the lower heating plate is fixedly connected with a connecting block, a driving lead screw is threadedly inserted into the connecting block, the driving lead screw is fixedly connected with a driving gear near one side of the inner top wall of the box, the driving gear is engaged with a driven gear on one side, a heating lead screw is inserted into and screwed through the middle of the driven gear, the lower end of the heating lead screw is fixedly connected with the upper end of the heating plate, and one side of the heating lead screw is connected with a heating displacement block capable of limiting the rotation of the heating lead screw.

[0015] By adopting the technical scheme, in the moving process of the lower heating plate, the lower heating plate drives the connecting block to move, the connecting block drives the driving lead screw to rotate in the moving process of the upper and lower movement, the driving lead screw drives the driving gear to rotate in the rotating process, the driving gear drives the driven gear to rotate in the rotating process, the driven gear drives the heating lead screw to move up and down in the rotating process, and the heating lead screw drives the upper heating plate to move in the moving process, so that the process that the upper heating plate and the lower heating plate are driven to move reversely by a single cylinder is realized.

[0016] Optionally, one end of the heating lead screw away from the connected upper heating plate penetrates the top side wall of the box and is in sliding connection with the top side wall of the box, a sealing frame for covering the heating lead screw and the heating moving block inside is fixedly connected to the outer top wall of the box, and the heating moving block is located inside the sealing frame and in sliding abutment with the inner wall of the sealing frame.

[0017] By adopting the technical scheme, since the sealing frame is arranged on the top of the box, the heating lead screw can be covered inside the sealing frame, and the sealing frame is fixedly connected with the box, so that the sealing frame can seal the box, and the phenomenon that external air enters the inside of the box when the vacuum pump extracts the air inside the box is reduced.

[0018] Optionally, the support frame is further connected with a lifting assembly capable of lifting the screen plate inside the support frame.

[0019] By adopting the technical scheme, since the lifting assembly exists, the trouble of workers taking out the screen plate inside the support frame is reduced.

[0020] Optionally, the support frame comprises a horizontal plate in abutment with the bottom wall of the screen plate, the lifting assembly comprises a plurality of supporting plates located on the horizontal plate, each supporting plate is capable of abutting with the screen plate, and each supporting plate is connected with the lower heating plate and moves reversely with the lower heating plate.

[0021] By adopting the technical scheme, in the moving process of the lower heating plate, the lower heating plate drives the supporting plate to move, and the screen plate inside the support frame can be moved in the moving process of the supporting plate, so that the trouble of adding a driving member to drive the supporting plate to move is reduced.

[0022] Optionally, one side of each supporting plate is fixedly connected with a connecting block, each connecting block is penetrated and threadedly connected with a lifting lead screw, one end of each lifting lead screw is fixedly connected with a driven bevel gear, one side of each driven bevel gear is engaged with a driving bevel gear, one side of each driving bevel gear is fixedly connected with a driven gear, one side of each driven gear is fixedly connected with a driving rack, and each driving rack is fixedly connected with the lower heating plate.

[0023] By adopting the above technical scheme, in the process of moving the lower heating plate, the lower heating plate drives the driving rack to move, the driving rack drives the driven gear to rotate in the process of moving, the driven gear drives the driven bevel gear to rotate in the process of rotating, the driven bevel gear drives the driving bevel gear to rotate in the process of rotating, the driving bevel gear drives the lifting lead screw to rotate in the process of rotating, and the lifting lead screw drives the connecting block and the supporting plate to move in the process of rotating, so as to realize the process of moving the supporting plate by the lower heating plate.

[0024] Optionally, each positioning push plate is fixedly connected with a positioning tooth at the bottom of the side abutting against the polyimide film.

[0025] By adopting the above technical scheme, due to the existence of the positioning tooth, the phenomenon that the positioning assembly is difficult to realize the positioning effect on the polyimide film due to the difficulty of the positioning push plate in pushing the polyimide film is reduced.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] Due to the vacuum pump connected with the box body, the phenomenon that air exists between the polyimide film and the screen plate during actual use, resulting in bubbles between the polyimide film and the screen plate after pasting, affecting subsequent use, is reduced.

[0028] By setting the positioning assembly driven by the lower positioning plate, the phenomenon that the pasting quality between the screen plate and the polyimide film is poor due to the positional deviation between the polyimide film and the screen plate is reduced.

[0029] By setting the lifting assembly, the trouble of the staff in taking the screen plate inside the supporting frame is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic view of the overall structure of the embodiment of the present application.

[0031] Figure 2 is a sectional view of the overall structure of the embodiment of the present application.

[0032] Figure 3 is Figure 2 is a local enlarged schematic view of structure A in the embodiment.

[0033] Figure 4 is a schematic view of the structure of the embodiment of the present application highlighting the lifting assembly.

[0034] Explanation of reference signs: 1, box body; 11, support frame; 111, horizontal plate; 112, vertical plate; 12, connecting rod; 13, sealing frame; 2, upper heating plate; 21, heating gear; 22, heating lead screw; 221, heating displacement block; 3, lower heating plate; 31, connecting block; 32, driving lead screw; 33, driving gear; 4, vacuum pump; 5, screen plate; 6, polyimide film; 7, air cylinder; 8, positioning assembly; 81, positioning push plate; 811, positioning tooth; 82, positioning screw; 821, positioning displacement block; 83, positioning sleeve; 84, positioning gear; 85, driving rack; 9, lifting assembly; 91, supporting plate; 911, connecting block; 92, lifting lead screw; 93, driven bevel gear; 94, driving bevel gear; 95, driven gear; 96, driving rack; 97, connecting pulley; 98, connecting belt. DETAILED DESCRIPTION

[0035] The following will be described in detail with reference to the accompanying drawings Figure 1 - the accompanying drawings Figure 4 The present application is further described in detail.

[0036] The embodiment of the present application discloses a vacuum pressing equipment, which refers to Figure 1 and Figure 2 The box body 1 is internally provided with a horizontally arranged support frame 11, and the support frame 11 comprises a rectangular frame-shaped horizontal plate 111, and a through hole is formed in the middle of the horizontal plate 111. Each horizontal plate 111 is fixedly connected with a vertical plate 112 arranged perpendicularly to the horizontal plate 111 on the side close to the inner wall of the adjacent box body 1. Each vertical plate 112 is fixedly connected with a connecting rod 12 on the side close to the inner wall of the adjacent box body 1, and the end of each connecting rod 12 away from the connected vertical plate 112 is fixedly connected with the inner wall of the adjacent box body 1.

[0037] The upper side of the support frame 11 is provided with a horizontally arranged upper heating plate 2. The lower side of the support frame 11 is provided with a horizontally arranged lower heating plate 3, and the lower heating plate 3 can be arranged through the through hole in the middle of the horizontal plate 111. A vacuum pump 4 is installed on one side of the box body 1, and the vacuum pump 4 is used to provide vacuum for the inside of the box body 1.

[0038] When it is needed to cover the upper side of the screen plate 5 with the polyimide film 6, the screen plate 5 is placed on the upper side of the horizontal plate 111 in the box body 1, and the side wall of the screen plate 5 is abutted against the adjacent vertical plate 112. Then the polyimide film 6 is placed at a proper position on the upper side of the screen plate 5, the upper heating plate 2 is covered on the upper side of the polyimide film 6, and the lower heating plate 3 is abutted against the screen plate 5 on the upper side of the horizontal plate 111. At the same time, the vacuum pump 4 is started, so that a low pressure or vacuum state is formed in the box body 1, thereby enabling the polyimide film 6 to be closely combined with the screen plate 5.

[0039] The vacuum pump 4 is arranged to provide a vacuum state inside the box 1, so that the polyimide film 6 can be closely attached to the screen plate 5 under the pressure state of the upper heating plate 2 and the lower heating plate 3, thereby increasing the attachment quality of the polyimide film 6 and the screen plate 5.

[0040] The box 1 is further provided with a positioning assembly 8 arranged inside the box 1, which is used to adjust the relative position between the polyimide film 6 placed on the upper side of the screen plate 5 and the lower side of the screen plate 5.

[0041] The lower side of the box 1 is provided with a vertically upwardly arranged air cylinder 7, the piston rod of the air cylinder 7 penetrates through the middle position of the bottom side wall of the box 1 and is in sliding connection with the bottom side wall of the box 1. The piston rod of the air cylinder 7 penetrates into one side of the inside of the box 1 and is fixedly connected with the lower side wall of the lower heating plate 3. The air cylinder 7 is connected with the positioning assembly 8 and is used to drive the positioning assembly 8 to move.

[0042] After the polyimide film 6 is placed on the upper side of the screen plate 5, the air cylinder 7 drives the lower heating plate 3 to move to the side close to the screen plate 5, and in the process, the air cylinder 7 drives the positioning assembly 8 to move to adjust the position of the polyimide film 6, so that when the upper heating plate 2 abuts against the polyimide film 6, the polyimide film 6 can be attached to the screen plate 5 in the appropriate position on the upper side of the screen plate 5. The attachment position of the polyimide film 6 and the screen plate 5 is more accurate.

[0043] Referring to Figure 2 and Figure 3 , the positioning assembly 8 includes a plurality of positioning push plates 81 uniformly distributed around the support frame 11 inside the box 1. In this embodiment, the number of positioning push plates 81 is four, and the four positioning push plates 81 are arranged one by one with the four vertical plates 112. Each positioning push plate 81 can abut against the polyimide film 6 placed on the upper side of the screen plate 5.

[0044] Each positioning push plate 81 is fixedly connected with a positioning screw 82 on the side close to the adjacent inner wall of the box 1. Each positioning screw 82 is provided with a reciprocating thread. Each positioning screw 82 is externally sleeved with a positioning sleeve 83 on the end away from the connected positioning push plate 81. Each positioning sleeve 83 is fixedly connected with the inner wall of the box 1 on the side away from the adjacent positioning push plate 81. Each positioning screw 82 is fixedly connected with a positioning displacement block 821 on the end inside the sleeved positioning sleeve 83. The cross section of each positioning displacement block 821 is rectangular. Each positioning screw 82 is threadedly sleeved with a positioning gear 84. The outer side wall of each positioning gear 84 penetrates through the side wall of the positioning sleeve 83 and is in rotational connection with the side wall of the adjacent positioning sleeve 83.

[0045] Each positioning gear 84 is engaged with a driving rack 85 on one side, and each driving rack 85 is fixedly connected with the lower heating plate 3.

[0046] After the polyimide film 6 is placed on the upper side of the screen plate 5, the lower heating plate 3 drives the driving rack 85 to move upwards during the process of driving the cylinder 7 to move upwards, the driving rack 85 drives the positioning gear 84 to rotate during the process of moving upwards, the positioning gear 84 drives the positioning screw 82 to move during the process of rotating, and the positioning screw 82 drives the positioning push plate 81 to move during the process of moving, and since the external thread of the positioning screw 82 adopts reciprocating thread, the whole process of driving the four positioning push plates 81 to move from the initial position to the side close to the polyimide film 6 to adjust the position of the polyimide film 6 on the upper side of the screen plate 5 and then return to the initial position can be realized during the process of moving upwards of the lower heating plate 3.

[0047] One corner of the lower heating plate 3 is fixedly connected with a connecting block 31, the connecting block 31 is horizontally arranged, a driving lead screw 32 is threadedly connected with the middle of the connecting block 31, the driving lead screw 32 is vertically arranged upwards, and one end of the driving lead screw 32 away from the connected connecting block 31 is rotationally connected with the inner top wall of the box body 1. A driving gear 33 is fixedly sleeved with one end of the driving lead screw 32 close to the inner top wall of the box body 1. The driving gear 33 meshes with a heating gear 21 close to the upper side of the upper heating plate 2, and the heating gear 21 is arranged above the upper heating plate 2. The middle of the heating gear 21 is penetrated and threadedly connected with a heating lead screw 22, and the lower end of the heating lead screw 22 is fixedly connected with the middle position of the upper side wall of the upper heating plate 2. The side of the heating lead screw 22 away from the upper heating plate 2 penetrates the top side wall of the box body 1 and is slidingly connected with the top side wall of the box body 1 in the vertical direction.

[0048] The top of the box body 1 is fixedly connected with a sealing frame 13, the sealing frame 13 can cover the heating lead screw 22 arranged inside, and the side of the sealing frame 13 close to the outer top wall of the box body 1 is fixedly connected with the outer top wall of the box body 1. One end of the heating lead screw 22 inside the sealing frame 13 is fixedly connected with a heating moving block 221, and the cross section of the heating moving block 221 is rectangular.

[0049] During the process of driving the lower heating plate 3 to move upwards by the cylinder 7, the lower heating plate 3 drives the connecting block 31 to move upwards, the connecting block 31 drives the driving lead screw 32 to rotate during the process of moving, the driving lead screw 32 drives the connected driving gear 33 to rotate during the process of rotating, the driving gear 33 drives the meshed heating gear 21 to rotate during the process of rotating, and the heating gear 21 drives the heating lead screw 22 to move downwards during the process of rotating, so that the process of driving the upper heating plate 2 and the lower heating plate 3 to move in opposite directions by the cylinder 7 can be realized.

[0050] Referring to Figure 4 The support frame 11 is also connected with a lifting assembly 9, and the lifting assembly 9 is used for lifting operation on the screen plate 5 placed inside the support frame 11.

[0051] The presence of the lifting assembly 9 facilitates the process of the staff moving the screen printing plate 5 with the polyimide film 6 pasted out of the inside of the box body 1.

[0052] The lifting assembly 9 comprises two oppositely arranged supporting plates 91, each of which is arranged parallel to the horizontal plate 111 near one side of the horizontal plate 111 and is arranged on the upper side of the two oppositely arranged horizontal plates 111. Each of the supporting plates 91 is fixedly connected with two spaced-apart connecting blocks 911 near one side of the adjacent vertical plate 112, each of which penetrates the adjacent vertical plate 112 and is slidably connected with the vertical plate 112 in the vertical direction. One end of each of the connecting blocks 911 penetrating the vertical plate 112 is threaded and inserted with a lifting lead screw 92 in the vertical direction.

[0053] One end of each of the two lifting lead screws 92 connected with each vertical plate 112 penetrating the connecting block 31 is fixedly connected with a driven bevel gear 93, one side of each driven bevel gear 93 is engaged with a driving bevel gear 94, one side of each driving bevel gear 94 away from the engaged driven bevel gear 93 is coaxially fixedly connected with a driven gear 95, one side of each driven gear 95 is engaged with a driving rack 96, and each driving rack 96 is fixedly connected with the lower heating plate 3.

[0054] The upper end of each lifting lead screw 92 is fixedly connected with a connecting pulley 97, and the outer sides of the connecting pulleys 97 connected with the two lifting lead screws 92 of the same vertical plate 112 are sleeved with the same connecting belt 98.

[0055] In actual practice, the screen printing plate 5 is placed on the supporting plate 91, and then during the upward movement of the lower heating plate 3, the lower heating plate 3 drives the two driving racks 96 to move upward, each driving rack 96 can drive the engaged driven gear 95 to rotate during the upward movement, each driven gear 95 drives the connected driving bevel gear 94 to rotate during the rotation, each driving bevel gear 94 drives the engaged driven bevel gear 93 to rotate during the rotation, and each driven bevel gear 93 drives the connected lifting lead screw 92 to rotate during the rotation, and each lifting lead screw 92 drives the rotation of the adjacent other lifting lead screw 92 through the rotation of the connecting belt 98 during the rotation, thereby achieving the synchronous rotation of the four lifting lead screws 92. The four lifting lead screws 92 drive the two supporting plates 91 to move downward during the rotation, so that the supporting plate 91 can drive the screen printing plate 5 to move into the supporting frame 11 for subsequent pasting of the polyimide film 6.

[0056] After the pasting is completed, in the process of moving downward of the lower heating plate 3, the lower heating plate 3 drives the driving rack 96 to move downward, the driving rack 96 drives the driven gear 95 to rotate in the process of moving downward, the driven gear 95 drives the driving bevel gear 94 and the driven bevel gear 93 to rotate reversely in the process of rotating, thereby driving the plurality of lifting lead screws 92 to rotate reversely, and further enabling the plurality of lifting lead screws 92 to drive the two supporting plates 91 to move upward, so as to realize the process that the screen plate 5 is driven by the supporting plates 91 to move out of the inside of the supporting frame 11, facilitating the carrying process of the staff.

[0057] With reference to Figure 3 Each positioning push plate 81 is fixedly connected with a positioning tooth 811 at the lower end of the side abutting against the polyimide film 6, and the positioning tooth 811 is gradually inclined upward from the side away from the positioning push plate 81 to the side close to the positioning push plate 81.

[0058] Due to the existence of the positioning tooth 811, when the positioning push plate 81 contacts the polyimide film 6, the polyimide film 6 on the upper side of the screen plate 5 can be better driven to move by the positioning tooth 811.

[0059] The implementation principle of the vacuum pressing equipment in the embodiment of the application is as follows: when it is needed to paste the polyimide film 6 on the screen plate 5, the screen plate 5 is placed on the upper side of the plurality of supporting plates 91, then the cylinder 7 is started to drive the lower heating plate 3 to move upward, the lower heating plate 3 drives the upper heating plate 2 to move downward in the process of moving upward, and simultaneously drives the two supporting plates 91 to move downward, so that the screen plate 5 can fall into the inside of the supporting frame 11, and simultaneously drives the four positioning push plates 81 to drive the polyimide film 6 on the upper side of the screen plate 5 to move to the appropriate position on the screen plate 5.

[0060] Then, the upper heating plate 2 and the lower heating plate 3 heat the screen plate 5 and the polyimide film 6 at the same time, and the vacuum pump 4 is started to extract the gas in the box body 1, so that the polyimide film 6 and the screen plate 5 can be stably connected.

[0061] The above are the preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A vacuum press apparatus, characterized by: The utility model provides a box (1) inside is equipped with the support frame (11) for bearing screen (5), the upper side of support frame (11) is equipped with the upper heating plate (2) for heating screen (5), the lower side of support frame (11) is equipped with the lower heating plate (3) for heating screen (5), one side of box (1) is connected with the vacuum pump (4) for providing vacuum for the inside of box (1), the inside of box (1) is connected with the positioning assembly (8) that can position polyimide film (6) placed to screen (5), the lower side of lower heating plate (3) is connected with the air cylinder (7) for moving lower heating plate (3), lower heating plate (3) is connected with positioning assembly (8) and can move positioning assembly (8), positioning assembly (8) includes a plurality of positioning push plate (81), and every positioning push plate (81) can be in the process of moving and polyimide film (6) located on the upper side of screen (5) is abutted, so as to realize the positioning of polyimide film (6) on the upper side of screen (5), every positioning push plate (81) is fixedly connected with the positioning screw rod (82) on the side close to adjacent box (1) inner wall, every positioning screw rod (82) outside is slidably sleeved with positioning sleeve (83) along the length direction of positioning screw rod (82), and every positioning screw rod (82) is fixedly connected with the positioning displacement block (821) for limiting the rotation of positioning screw rod (82) at one end in the positioning sleeve (83) connected, every positioning screw rod (82) is also threadedly sleeved with positioning gear (84) outside, and one side of every positioning gear (84) is engaged with drive rack (85), and every drive rack (85) is fixedly connected with lower heating plate (3), after polyimide film (6) is placed on the upper side of screen (5), starts air cylinder (7) and drives lower heating plate (3) to move upwards in the process, and lower heating plate (3) drives drive rack (85) to move upwards, drive rack (85) drives positioning gear to rotate in the process of moving upwards, positioning gear drives positioning screw rod (82) to move in the process of rotating, positioning screw rod (82) drives positioning push plate (81) to move in the process of moving, and the external thread of positioning screw rod (82) adopts reciprocating thread, drives four positioning push plates (81) to move from initial position to the side close to polyimide film (6) and restores to initial position after the position adjustment of polyimide film (6) on the upper side of screen (5).

2. A vacuum press apparatus according to claim 1, wherein: One side of the lower heating plate (3) is fixedly connected with a connecting block (31), a driving lead screw (32) is threadedly inserted into the connecting block (31), the driving lead screw (32) is fixedly connected with a driving gear (33) on the side close to the inner top wall of the box body (1), the driving gear (33) is engaged with a driven gear (95) on one side, the driven gear (95) is penetrated and threadedly inserted with a heating lead screw (22) in the middle, the lower end of the heating lead screw (22) is fixedly connected with the upper end of the heating plate, and the heating lead screw (22) is connected with a heating moving block (221) capable of limiting the rotation of the heating lead screw (22) on one side.

3. A vacuum press apparatus according to claim 2, wherein: The end of the heating lead screw (22) away from the connected upper heating plate (2) penetrates the top side wall of the box body (1) and is slidably connected with the top side wall of the box body (1), and a sealing frame (13) for covering the heating lead screw (22) and the heating moving block (221) is fixedly connected to the outer top wall of the box body (1), the heating moving block (221) is located in the sealing frame (13) and slidably abuts against the inner wall of the sealing frame (13).

4. The vacuum press apparatus of claim 1, wherein: The support frame (11) is also connected with a lifting assembly (9) capable of lifting the screen printing plate (5) inside the support frame (11).

5. A vacuum press apparatus according to claim 4, wherein: The support frame (11) comprises a horizontal plate (111) abutting against the bottom wall of the screen printing plate (5), and the lifting assembly (9) comprises a plurality of supporting plates (91) located on the horizontal plate (111), each supporting plate (91) can abut against the screen printing plate (5), and each supporting plate (91) is connected with the lower heating plate (3) and moves in the opposite direction of the lower heating plate (3).

6. A vacuum press apparatus according to claim 5, wherein: One side of each supporting plate (91) is fixedly connected with a connecting block (911), and each connecting block (911) is penetrated and threadedly connected with a lifting lead screw (92), one end of each lifting lead screw (92) is fixedly connected with a driven bevel gear (93), one side of each driven bevel gear (93) is engaged with a driving bevel gear (94), one side of each driving bevel gear (94) is fixedly connected with a driven gear (95), one side of each driven gear (95) is fixedly connected with a driving rack (96), and each driving rack (96) is fixedly connected with the lower heating plate (3).

7. The vacuum press apparatus of claim 1, wherein: Each positioning push plate (81) is fixedly connected with a positioning tooth (811) on the side abutting against the bottom of the polyimide film (6).

Images