CN111746099B - Anti-deformation screen vacuum adsorption mechanism - Google Patents
Anti-deformation screen vacuum adsorption mechanism Download PDFInfo
- Publication number
- CN111746099B CN111746099B CN202010725439.6A CN202010725439A CN111746099B CN 111746099 B CN111746099 B CN 111746099B CN 202010725439 A CN202010725439 A CN 202010725439A CN 111746099 B CN111746099 B CN 111746099B
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- screen
- frame
- screen plate
- upper screen
- plate
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- 238000001179 sorption measurement Methods 0.000 title claims abstract description 25
- 230000007246 mechanism Effects 0.000 title claims abstract description 20
- 238000009434 installation Methods 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000009423 ventilation Methods 0.000 claims description 7
- 238000007650 screen-printing Methods 0.000 claims description 2
- 239000003292 glue Substances 0.000 abstract description 3
- 239000002184 metal Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/14—Details
- B41F15/34—Screens, Frames; Holders therefor
- B41F15/36—Screens, Frames; Holders therefor flat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2215/00—Screen printing machines
- B41P2215/10—Screen printing machines characterised by their constructional features
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Screen Printers (AREA)
Abstract
The invention relates to the technical field of screen plate adsorption, in particular to an anti-deformation screen plate vacuum adsorption mechanism, and aims to solve the technical problem that a screen plate of the existing screen plate vacuum adsorption mechanism is easy to deform. The technical scheme is as follows: comprises an upper screen frame, an upper screen plate, a lower screen frame and a lower screen plate; the side wall of the upper screen frame is provided with a pneumatic connector, the upper screen plate is stretched on the upper surface of the upper screen frame and sealed, and the edge part of the upper screen plate is glued and sealed; the inner edge part of the lower screen frame protrudes upwards to form an installation frame, the installation frame is arranged in the upper screen frame, a gap is reserved between the outer wall of the installation frame and the inner wall of the upper screen frame, the lower screen is stretched on the upper surface of the installation frame and sealed, the lower screen is coated with glue completely, the distance between the upper screen and the lower screen is 0.2-0.5 mm, a screen gauze is arranged between the upper screen and the lower screen, the deformation resistance of the lower screen is poorer than that of the upper screen, and the upper surface of the part of the lower screen, which is positioned outside the installation frame, is connected with the lower surface of the upper screen in a sealing way through a sealing ring.
Description
Technical Field
The invention relates to the technical field of screen plate adsorption, in particular to an anti-deformation screen plate vacuum adsorption mechanism.
Background
The flat panel display industry is the most active and rapidly developed industry at present, a screen vacuum adsorption mechanism can be used for many times in the manufacturing process of a flat panel display device, the screen stretched on a screen frame has excellent flexibility and good air permeability, and an air permeable area of the screen has good adsorptivity to a flat sheet under the condition of vacuumizing the screen cavity, and the flat panel display device is widely applied to the attaching process of polaroids, OCAs (optically clear adhesives), graphite sheets and protective films. The existing screen vacuum adsorption mechanism is characterized in that a layer of screen is stretched on one side of an opening of a metal box body, the strength of the metal box body is far greater than that of the screen, the screen is deformed firstly under the condition of vacuumizing the box body, a concave surface is formed in a vacuum adsorption area of a sheet, the sheet adsorbed on the concave surface is bent and deformed accordingly, the deformation greatly affects the visual positioning precision of the sheet, and the attaching precision of the sheet is reduced. In addition, the metal box screen plate has a complex structure and a huge volume, and limits the application range of the metal box screen plate.
Disclosure of Invention
The invention aims to solve the technical problem that the screen of the existing screen vacuum adsorption mechanism is easy to deform.
The technical scheme adopted for solving the technical problems is as follows:
an anti-deformation screen vacuum adsorption mechanism comprises an upper screen frame, an upper screen plate, a lower screen frame and a lower screen plate; the side wall of the upper screen frame is provided with at least one pneumatic connector which is communicated with the inside of the upper screen frame, the upper screen plate is stretched on the upper surface of the upper screen frame and sealed (namely, the upper screen plate covers the whole opening of the upper screen frame), and the edge part of the upper screen plate is glued and sealed so that only the middle part forms a ventilation area for adsorbing products; the inner edge part of the lower screen frame protrudes upwards to form a mounting frame, the mounting frame is arranged in the upper screen frame, a gap is reserved between the outer wall of the mounting frame and the inner wall of the upper screen frame, the lower screen is stretched on the upper surface of the mounting frame and sealed, the lower screen is coated with glue so that all the surfaces are non-breathable areas, the distance between the upper screen and the lower screen is 0.2-0.5 mm (the lower screen is required to be rolled from the inner part of the lower screen frame through the roller stretching into the lower screen during operation, the force is transmitted to the upper screen through the deformation of the lower screen, thereby rolling of a product is realized, if the distance between the upper screen and the lower screen is too large, the roller rolling force cannot be transmitted to the product, if the distance between the upper screen and the lower screen is too small, the upper screen and the lower screen are adsorbed together), the screen is placed between the upper screen and the lower screen (the screen is used for avoiding the adsorption together during the suction of the upper screen and the lower screen, the negative pressure cavity is influenced), the deformation resistance of the upper screen is poorer than the upper screen (so as to ensure that the negative pressure is formed during the suction, the deformation resistance of the upper screen is preferentially, and the lower screen is positioned on the upper screen and the sealing ring is arranged on the outer surface of the upper screen frame.
When the vacuum suction device is used, the upper screen frame, the lower screen frame, the upper screen plate, the lower screen plate and the product form a closed cavity together, the pneumatic connector is connected with the vacuum source for suction, the closed cavity forms a negative pressure cavity, the product is placed in the ventilation area of the upper screen plate, and the product is firmly adsorbed on the upper surface of the upper screen plate under the action of negative pressure.
The beneficial effects of the invention are as follows:
1) According to the deformation-preventing screen vacuum adsorption mechanism, the upper screen, the product, the lower screen, the upper screen frame and the lower screen frame jointly form the sealed cavity, when the sealed cavity is pumped to form negative pressure, the deformation-preventing capability of the lower screen is lower than that of the upper screen, so that the lower screen can be deformed preferentially, the deformation of the upper screen is tiny and even not deformed, and compared with the existing metal box type structure, the deformation of the screen for adsorbing the product is greatly reduced, and the accuracy of a visual positioning system is guaranteed;
2) The deformation-preventing screen vacuum adsorption mechanism is made of the upper/lower screen frames, and compared with the existing metal box body structure, the deformation-preventing screen vacuum adsorption mechanism is simpler in structure, smaller in size and wider in application range.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application and that other drawings may be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is an isometric view of the overall structure of the vacuum chuck mechanism of the present invention;
FIG. 2 is a cross-sectional view of a screen vacuum adsorption mechanism of the present invention;
FIG. 3 is a schematic diagram of the assembly structure of the lower frame and lower screen of the present invention;
fig. 4 is a schematic diagram of an assembly structure of the upper screen frame and the upper screen plate of the present invention.
In the figure:
1 ┄, installing a net frame; 2 ┄, screen printing; 3 ┄ lower net frame; 4 ┄ lower screen; 5 ┄ pneumatic connectors; 6 ┄ ventilation zones; 7 ┄ mounting frames; 8 ┄ gauze; 9 ┄ seal rings; 10 ┄ bolts.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Referring to fig. 1 to 4, the deformation-preventing screen vacuum adsorption mechanism comprises an upper screen frame 1, an upper screen 2, a lower screen frame 3 and a lower screen 4, wherein the screen adopts the existing screen structure, and the screen is of a ventilation structure, and the deformation-preventing screen vacuum adsorption mechanism realizes sealing by gluing the upper screen frame 2, the lower screen frame 3 and the lower screen 4; the side wall of the upper screen frame 1 is provided with at least one pneumatic connector 5, the pneumatic connector 5 is communicated with the inside of the upper screen frame 1, the upper screen plate 2 is stretched on the upper surface of the upper screen frame 1 and sealed, the stretching is a common technical means in the field, and the edge of the screen plate is glued or otherwise fixed on the edge of the screen frame by means of a certain instrument; the edge part of the upper screen plate 2 is glued and sealed so that a ventilation area 6 for adsorbing products is formed at the middle part only; the inner edge part of the lower screen frame 3 protrudes upwards to form a mounting frame 7, the mounting frame 7 is arranged in the upper screen frame 1, a gap is reserved between the outer wall of the mounting frame 7 and the inner wall of the upper screen frame 1, the lower screen plate 4 is stretched on the upper surface of the mounting frame 7 and sealed, the lower screen plate 4 is coated with glue so that all the surfaces are non-permeable areas, the distance between the upper screen plate 2 and the lower screen plate 4 is 0.2-0.5 mm, 0.2mm, 0.3mm, 0.4mm or 0.5mm, and a screen 8 is arranged between the upper screen plate 2 and the lower screen plate 4, the deformation resistance of the lower screen plate 4 is lower than that of the upper surface of the part of the lower screen frame 3 positioned outside the mounting frame 7 is in sealing connection with the lower surface of the upper screen frame 1 through a sealing ring 9.
As a preferable installation mode of the upper screen frame 1 and the lower screen frame 3 which are in sealing connection, an annular groove which is arranged at intervals with the installation frame 7 is arranged on the upper surface of the part of the lower screen frame 3 which is positioned outside the installation frame 7, a sealing ring 9 is embedded in the annular groove, and the lower screen frame 3 and the upper screen frame 1 are pressed tightly through bolts 10. The purpose of the spacing arrangement is to locate the sealing rings 9 in the middle of the contact surface of the upper/lower net frame 3, and if the sealing rings are located at the edge of the contact surface, poor sealing is likely to occur. In other embodiments, other means for installing the sealing ring 9, which are commonly used in the art, may be adopted, for example, the sealing ring 9 is embedded in the lower surface of the upper frame 1.
Preferably, the upper screen 2 and the lower screen 4 are 280-320 meshes, the gauze 8 is 50-80 meshes, the tension of the upper screen 2 is 22-25N, and the tension of the lower screen 4 is 8-12N. The mesh number of the screen plate influences the mechanical property, and the mesh number can well complete the adsorption function within 280-320 meshes, and is particularly suitable for adsorbing graphite sheets, and can be 280 meshes or 300 meshes or 320 meshes. Too many meshes of the gauze 8 are easy to cause the phenomenon of blocking ventilation, too few meshes are easy to cause the upper and lower screens 4 to be adsorbed together, and the mesh number adopts 50-80 meshes as an optimal range, and can be particularly 50 meshes or 70 meshes or 80 meshes. If the difference of the deformation resistance of the upper and lower screens 4 is too large, the lower screens 4 are easy to deform when pumping, and the requirement that the negative pressure is not overcome even if the upper and lower screens 4 are attached together easily occurs; if the deformation resistance difference of the upper screen plate 4 and the lower screen plate 4 is too small, the upper screen plate 4 and the lower screen plate 4 are easy to deform simultaneously during air suction, the tension of the upper screen plate 2 and the lower screen plate 4 is set in the range, the lower screen plate 4 can be ensured to deform preferentially during air suction by matching with the mesh number, the upper screen plate 2 deforms slightly or does not deform, the tension of the upper screen plate 2 can be 22 or 24 or 25N, and the tension of the lower screen plate 4 can be 8 or 10 or 12N.
Preferably, both the upper frame 1 and the lower frame 3 are square frame structures, and the portion of the lower frame 3 located outside the mounting frame 7 is fitted to the upper frame 1. The square frame is a rectangular frame-shaped structure, namely the outer wall and the inner wall are rectangular, and the rectangular shape of the inner wall and the rectangular shape of the outer wall of the square frame are the same and coaxial. The square frame can be more suitable for the structural requirement of the existing adsorption equipment, and a small gap can be formed between the outer wall of the installation frame 7 and the inner wall of the upper net frame 1, so that the gas amount for air extraction is saved. In other embodiments, the upper/lower frame 3 may be a round frame or other frame.
The same or similar reference numbers in the drawings of embodiments correspond to the same or similar components; in the description of the present application, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present application and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (4)
1. The utility model provides a screen vacuum adsorption mechanism of preapring for an unfavorable turn of events, its characterized in that: comprises an upper screen frame (1), an upper screen plate (2), a lower screen frame (3) and a lower screen plate (4); at least one pneumatic connector (5) is arranged on the side wall of the upper screen frame (1), the pneumatic connector (5) is communicated with the inside of the upper screen frame (1), the upper screen plate (2) is stretched on the upper surface of the upper screen frame (1) and sealed, and the edge part of the upper screen plate (2) is glued and sealed so that a ventilation area (6) for adsorbing products is formed only in the middle part; the inner edge part of the lower screen frame (3) protrudes upwards to form an installation frame (7), the installation frame (7) is arranged in the upper screen frame (1), a gap is reserved between the outer wall of the installation frame (7) and the inner wall of the upper screen frame (1), the lower screen plate (4) is stretched on the upper surface of the installation frame (7) and sealed, all the lower screen plate (4) is glued so that all the surfaces are non-breathable areas, the distance between the upper screen plate (2) and the lower screen plate (4) is 0.2-0.5 mm, a screen yarn (8) is arranged between the upper screen plate (2) and the lower screen plate (4), the deformation resistance of the lower screen plate (4) is poorer than that of the upper screen plate (2), and the upper surface of the part of the lower screen frame (3) located on the outer side of the installation frame (7) is in sealing connection with the lower surface of the upper screen frame (1) through a sealing ring (9).
2. The deformation-preventing screen vacuum adsorption mechanism according to claim 1, wherein: the upper surface of the part of the lower screen frame (3) which is positioned outside the installation frame (7) is provided with an annular groove which is arranged at intervals with the installation frame (7), a sealing ring (9) is embedded in the annular groove, and the lower screen frame (3) and the upper screen frame (1) are tightly pressed through bolts (10).
3. The deformation-preventing screen vacuum adsorption mechanism according to claim 1, wherein: the upper screen plate (2) and the lower screen plate (4) are 280-320 meshes, the gauze (8) is 50-80 meshes, the tension of the upper screen plate (2) is 22-25N, and the tension of the lower screen plate (4) is 8-12N.
4. A deformation-preventing vacuum adsorption mechanism for a screen printing plate according to any one of claims 1 to 3, wherein: the upper net frame (1) and the lower net frame (3) are both in square frame structures, and the part of the lower net frame (3) positioned at the outer side of the installation frame (7) is matched with the upper net frame (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010725439.6A CN111746099B (en) | 2020-07-24 | 2020-07-24 | Anti-deformation screen vacuum adsorption mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010725439.6A CN111746099B (en) | 2020-07-24 | 2020-07-24 | Anti-deformation screen vacuum adsorption mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN111746099A CN111746099A (en) | 2020-10-09 |
| CN111746099B true CN111746099B (en) | 2024-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010725439.6A Active CN111746099B (en) | 2020-07-24 | 2020-07-24 | Anti-deformation screen vacuum adsorption mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114407513B (en) * | 2022-01-06 | 2023-08-01 | Tcl华星光电技术有限公司 | Printing screen and method for producing the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212446684U (en) * | 2020-07-24 | 2021-02-02 | 中电科风华信息装备股份有限公司 | Deformation-preventing vacuum adsorption mechanism for screen printing plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004145033A (en) * | 2002-10-24 | 2004-05-20 | Ushio U-Tech Inc | Exposure apparatus for block copy material for screen printing |
| CN103935037B (en) * | 2014-04-09 | 2016-01-20 | 西安交通大学 | The colored 3D printer of a kind of integrated form powder |
| CN110668246A (en) * | 2019-10-30 | 2020-01-10 | 深圳奥图美特技术有限公司 | Screen printing plate film pasting device capable of pasting 3D curved surface product |
| CN110723588A (en) * | 2019-11-14 | 2020-01-24 | 深圳奥图美特技术有限公司 | Vacuum pump-free small-size screen printing plate film pasting device |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212446684U (en) * | 2020-07-24 | 2021-02-02 | 中电科风华信息装备股份有限公司 | Deformation-preventing vacuum adsorption mechanism for screen printing plate |
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