CN215354318U - Optical film micro-concave coating system - Google Patents
Optical film micro-concave coating system Download PDFInfo
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- CN215354318U CN215354318U CN202121092368.7U CN202121092368U CN215354318U CN 215354318 U CN215354318 U CN 215354318U CN 202121092368 U CN202121092368 U CN 202121092368U CN 215354318 U CN215354318 U CN 215354318U
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Abstract
The utility model discloses an optical film micro-concave coating system, which comprises a groove body, a liquid supply barrel, a liquid supply pipeline and a return pipeline, wherein a coating material groove is arranged on the groove body, the barrel bottom of the liquid supply barrel is communicated with the coating material groove through the liquid supply pipeline, the liquid supply pipeline is provided with a liquid supply valve and a liquid supply pump, the bottom of the coating material groove is communicated with the side surface of the liquid supply barrel through the return pipeline, and the return pipeline is provided with a liquid return valve; the advantages are that the optical particles deposited at the bottom of the coating material groove can be cleaned without stopping, the continuous operation of coating production influenced by the deposition of the optical particles is effectively avoided, and the overall production efficiency of the optical film is improved.
Description
Technical Field
The utility model belongs to the technical field of coating, and particularly relates to an optical film micro-concave coating system.
Background
In the field of TFT-LCD liquid crystal displays, optical films satisfying specified requirements, such as diffusion films, antiglare films, brightness enhancement composite films, etc., can be obtained by coating liquids containing optical particles on the front or back of various optical base films (such as PET, TAC, COP, PMMA, PC). Since the coating liquid contains optical particles having various particle diameters, the optical particles are usually applied to the optical base film by using an application device such as a dimple or a slit in order to ensure smooth application of the optical particles to the optical base film.
The micro-concave coating device is a coating device which is widely used at present, a single-point or multi-point liquid supply mode is often adopted for coating, the flow direction and the flow speed of coating liquid in a coating material groove can not be kept consistent due to single-point or multi-point liquid supply, vortex can be easily generated in the coating liquid, optical particles are likely to agglomerate in the environment due to the fact that the coating liquid contains the optical particles, then the optical particles are slowly deposited to the bottom of the coating material groove, if the coating defects such as wire drawing, dark lines, stripes and the like can be caused on the surface of an optical film after coating, the coating material groove needs to be periodically stopped and cleaned, the stopping and cleaning can cause interruption of coating production, and the overall production efficiency of the optical film is reduced.
Disclosure of Invention
The utility model aims to provide an optical film micro-concave coating system which can clean optical particles deposited at the bottom of a coating material tank under the condition of no shutdown, effectively avoid the continuous operation of coating production influenced by the deposition of the optical particles and improve the overall production efficiency of an optical film.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides an optical film slightly concave coating system, includes cell body, liquid supply tank, liquid supply pipe and backflow pipeline, the cell body on be provided with and scribble the cloth groove, the barrel head of liquid supply tank pass through liquid supply pipe with scribble the cloth groove intercommunication, liquid supply pipe on be provided with liquid feed valve and liquid feed pump, the bottom of scribbling the cloth groove pass through backflow pipeline with the side intercommunication of liquid supply tank, backflow pipeline on be provided with the liquid return valve, this optical film slightly concave coating system still includes first drain line, first drain line on be provided with first drain valve, first drain line one end with backflow pipeline intercommunication, first drain line with backflow pipeline's tie point be located scribble the cloth groove with the position between the liquid return valve.
The optical film micro-concave coating system also comprises a second liquid discharge pipeline, wherein a second liquid discharge valve is arranged on the second liquid discharge pipeline, one end of the second liquid discharge pipeline is communicated with the liquid supply pipeline, and a connection point of the second liquid discharge pipeline and the liquid supply pipeline is positioned between the liquid supply barrel and the liquid supply valve. When the second drain valve is opened, the coating liquid in the liquid supply barrel can be discharged through the second drain pipeline, so that the residual coating liquid in the liquid supply barrel can be discharged and the liquid supply barrel can be cleaned after the coating production is finished.
The coating device comprises a trough body, wherein two buffer units are arranged in the trough body, the two buffer units are symmetrically distributed left and right, each buffer unit comprises a distribution cavity and a slit extending in the front-rear direction, the upper end of each distribution cavity is communicated with a coating trough through the slit, n liquid inlets communicated with the outer side wall of the trough body are formed in the inner wall of each distribution cavity, and n is an integer greater than or equal to 1; one end of the liquid supply pipeline is communicated with the bottom of the liquid supply barrel, the other end of the liquid supply pipeline is connected with 2n shunt pipes, 2n shunt pipes are in one-to-one correspondence with 2n liquid inlets, and the other ends of the corresponding shunt pipes are communicated with the liquid inlets. In the structure, coating liquid containing optical particles in a liquid supply barrel is collected into a distribution cavity after passing through a liquid supply pipeline and a flow dividing pipe, the coating liquid flows upwards through a slit at a slow flow rate after filling the distribution cavity and finally flows into a coating material groove to reduce the pulse intensity when the coating liquid enters the coating material groove; through setting up two buffer unit and being used for the feed liquor simultaneously to guarantee to supply liquid efficiency.
The distribution chamber be the halfcylinder that extends along the fore-and-aft direction, the inner wall in distribution chamber constitute by arc surface, side, preceding terminal surface and rear end face, the side be vertical face, the inlet setting be in the lowest of side, the lower extreme of slit with the highest point intercommunication of arc surface. In this structure, set up the inlet in the lower extreme of side, can make the coating liquid that flows into the distribution chamber from the inlet upwards flow along the circular arc, the velocity of flow of this in-process coating liquid slowly reduces, can effectively reduce the pulse strength of coating liquid, and it is difficult for producing bubble, vortex in the distribution chamber, avoids the optical particle in the coating liquid to take place the deposit in the distribution chamber simultaneously.
The arc radius R of the arc surface satisfies the following conditions: r is more than or equal to 5mm and less than or equal to 10 mm; the width A of the slit satisfies the following conditions: a is more than or equal to 1mm and less than or equal to 3 mm; the flow velocity V of the coating liquid in the slit satisfies the following conditions: v is more than or equal to 0.5cm/sec and less than or equal to 3 cm/sec.
The coating material groove is an arc groove extending along the front-back direction, and one end of the backflow pipeline is communicated with the lowest position of the arc groove. In the structure, the coating material groove is set to be an arc-shaped groove, no dead angle exists in the coating material groove, and optical particles easily flow into a backflow pipeline and are discharged into the liquid supply barrel.
The top of scribbling the cloth groove be provided with little concave roller, the diameter D of little concave roller satisfy: d is more than or equal to 50mm and less than or equal to 60 mm; the vertical distance H between the highest point of the arc-shaped groove and the lowest point of the arc-shaped groove satisfies the following conditions: h is more than or equal to 27mm and less than or equal to 35 mm; the vertical distance B between the lowest point of the arc-shaped groove and the lowest point of the micro-concave roller meets the following requirements: b is more than or equal to 2mm and less than or equal to 5 mm; the vertical distance L between the height of the coating liquid in the coating material groove and the lowest point of the arc-shaped groove meets the following requirements: l is more than or equal to 20mm and less than or equal to 30 mm. In the structure, the distance between the micro-concave roller and the arc-shaped groove is smaller, the contact area between the coating liquid in the coating material groove and the outside air is smaller, the probability of air pollution of the coating liquid is reduced, the volatilization amount of the solvent in the coating liquid is reduced, and the uniformity of the concentration of optical particles in the coating liquid is favorably maintained.
The liquid supply barrel on be provided with agitating unit, agitating unit include driving motor, puddler and a plurality of blade, the upper end of puddler with driving motor connect, the lower extreme of puddler stretch into the liquid supply barrel in, a plurality of the blade along the equidistant distribution of circumferencial direction be in the lower extreme of puddler, driving motor be used for the drive the puddler rotate. In the structure, the coating liquid in the liquid supply barrel is continuously stirred by the stirring device so that the coating liquid and the optical particles are uniformly mixed, a certain stirring speed is maintained to ensure that the optical particles do not settle, no bubbles are generated in the coating liquid, and the driving motor can adopt a common servo motor or a common stepping motor on the market.
The liquid supply pipeline is also provided with a filter, and the filter is positioned between the liquid supply pump and the coating material groove.
Compared with the prior art, the utility model has the advantages that:
1. when the optical particles are deposited at the bottom of the coating material tank, the optical particles at the bottom of the coating material tank can be discharged into the liquid supply barrel or discharged through the first liquid discharge pipeline through the backflow pipeline, so that the optical particles deposited at the bottom of the coating material tank can be cleaned without stopping the machine, the continuous operation of coating production is effectively prevented from being influenced by the deposition of the optical particles, and the overall production efficiency of the optical film is improved;
2. when the first liquid discharge valve is opened, the coating liquid in the coating material groove can be discharged through the first liquid discharge pipeline, so that the coating liquid in the coating material groove can be maintained and discharged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a first partial schematic view of the present invention;
fig. 3 is a partial structural schematic diagram of the present invention.
In the figure: 1. a trough body; 11. coating a cloth trough; 2. a liquid supply barrel; 3. a liquid supply conduit; 31. a liquid supply valve; 32. a liquid supply pump; 33. A filter; 34. a shunt tube; 4. a return line; 41. a liquid return valve; 5. a first drain conduit; 51. a first drain valve; 6. A second drain conduit; 61. a second drain valve; 7. a buffer unit; 71. a distribution chamber; 711. a circular arc surface; 712. a side surface; 72. A slit; 73. a liquid inlet; 8. a micro-concave roller; 9. a stirring device; 91. a stirring rod; 92. a blade.
Detailed Description
The utility model is described in further detail below with reference to the accompanying examples.
The first embodiment is as follows: as shown in fig. 1, an optical film micro-recess coating system includes a tank body 1, a liquid supply tank 2, a liquid supply pipeline 3 and a return pipeline 4, wherein a coating material tank 11 is disposed on the tank body 1, a bottom of the liquid supply tank 2 is communicated with the coating material tank 11 through the liquid supply pipeline 3, a liquid supply valve 31 and a liquid supply pump 32 are disposed on the liquid supply pipeline 3, a bottom of the coating material tank 11 is communicated with a side surface of the liquid supply tank 2 through the return pipeline 4, and a return valve 41 is disposed on the return pipeline 4, wherein the liquid supply pump 32 is used for providing coating liquid conveying power, coating liquid flow is controlled by the liquid supply pump 32, and the liquid supply pump 32 can adopt a common displacement pump such as a diaphragm pump or a metering pump in the market.
This optical film dimple coating system still includes first drain pipe 5 and second drain pipe 6, be provided with first drain valve 51 on the first drain pipe 5, be provided with second drain valve 61 on the second drain pipe 6, the one end and the backflow pipeline 4 intercommunication of first drain pipe 5, the tie point of first drain pipe 5 and backflow pipeline 4 is located the position between coating cloth groove 11 and the liquid return valve 41, the one end and the liquid supply pipe 3 intercommunication of second drain pipe 6, the tie point of second drain pipe 6 and liquid supply pipe 3 is located the position between feed barrel 2 and the feed valve 31.
In this embodiment, the liquid supply pipe 3 is further provided with a filter 33, and the filter 33 is disposed at a position between the liquid supply pump 32 and the dope tank 11, and usually, the filter 33 is composed of a single or two canisters.
Example two: as shown in fig. 1 and 2, the rest of the structure is the same as that of the first embodiment, and the structure is different in that two buffer units 7 are arranged in the tank body 1, the two buffer units 7 are distributed in bilateral symmetry, each buffer unit 7 comprises a distribution cavity 71 and a slit 72 extending in the front-rear direction, the upper end of the distribution cavity 71 is communicated with the coating material tank 11 through the slit 72, n liquid inlets 73 communicated with the outer side wall of the tank body 1 are arranged on the inner wall of the distribution cavity 71, and n is an integer greater than or equal to 1; one end of the liquid supply pipeline 3 is communicated with the bottom of the liquid supply barrel 2, the other end of the liquid supply pipeline 3 is connected with 2n shunt tubes 34, the 2n shunt tubes 34 are in one-to-one correspondence with the 2n liquid inlets 73, and the other ends of the corresponding shunt tubes 34 are communicated with the liquid inlets 73.
In this embodiment, n is preferably 1, 2, 3, 4 or 5, and when n is greater than 1, the n liquid inlets are equally spaced in the front-rear direction.
Example three: as shown in fig. 1 to 3, the remaining portions are the same as those of the embodiment, except that the distribution chamber 71 is a semi-cylinder extending in the front-rear direction, the inner wall of the distribution chamber 71 is composed of an arc surface 711, a side surface 712, a front end surface and a rear end surface, the side surface 712 is a vertical surface, the liquid inlet 73 is disposed at the lowest position of the side surface 712, and the lower end of the slit 72 is communicated with the highest position of the arc surface 711.
In this embodiment, the arc radius R of the arc surface 711 satisfies: r is more than or equal to 5mm and less than or equal to 10 mm; the width a of the slit 72 satisfies: a is more than or equal to 1mm and less than or equal to 3 mm; the flow velocity V of the dope in the slit 72 satisfies: v is more than or equal to 0.5cm/sec and less than or equal to 3 cm/sec.
Example four: as shown in fig. 1 and 2, the remaining portions are the same as those of the first embodiment, except that the coating material slot 11 is an arc-shaped slot extending in the front-rear direction, and one end of the return duct 4 communicates with the lowest portion of the arc-shaped slot.
In this embodiment, the coating trough 11 is provided with a slightly concave roller 8 above, and the diameter D of the slightly concave roller 8 satisfies: d is more than or equal to 50mm and less than or equal to 60 mm; the vertical distance H between the highest point of the arc-shaped groove and the lowest point of the arc-shaped groove meets the following requirements: h is more than or equal to 27mm and less than or equal to 35 mm; the vertical distance B between the lowest point of the arc-shaped groove and the lowest point of the micro-concave roller 8 meets the following requirements: b is more than or equal to 2mm and less than or equal to 5 mm; the vertical distance L between the height of the coating liquid in the coating material groove 11 and the lowest point of the arc-shaped groove meets the following requirements: l is more than or equal to 20mm and less than or equal to 30 mm.
Example five: the rest of the components are the same as the first embodiment, and the difference is that the stirring device 9 is arranged on the liquid supply barrel 2, the stirring device 9 comprises a driving motor (not shown in the figure), a stirring rod 91 and a plurality of blades 92, the upper end of the stirring rod 91 is connected with the driving motor, the lower end of the stirring rod 91 extends into the liquid supply barrel 2, the blades 92 are distributed at the lower end of the stirring rod 91 at equal intervals along the circumferential direction, and the driving motor is used for driving the stirring rod 91 to rotate.
Claims (9)
1. The utility model provides an optical film dimple coating system, includes cell body, liquid supply tank, liquid supply pipe and backflow pipeline, the cell body on be provided with and scribble the cloth groove, the barrel head of liquid supply tank pass through liquid supply pipe with scribble the cloth groove intercommunication, liquid supply pipe on be provided with liquid supply valve and liquid feed pump, the bottom of scribbling the cloth groove pass through backflow pipeline with the side intercommunication of liquid supply tank, backflow pipeline on be provided with the liquid return valve, its characterized in that still includes first drain line, first drain line on be provided with first drain valve, first drain line one end with backflow pipeline intercommunication, first drain line with backflow pipeline's tie point be located scribble the cloth groove with the position between the liquid return valve.
2. The optical film gravure coating system of claim 1, further comprising a second drain line, wherein the second drain line is provided with a second drain valve, one end of the second drain line is connected to the liquid supply line, and a connection point of the second drain line to the liquid supply line is located between the liquid supply barrel and the liquid supply valve.
3. The optical film micro-concave coating system according to claim 1, wherein two buffer units are arranged in the tank body, the two buffer units are distributed in bilateral symmetry, the buffer units comprise distribution cavities and slits extending in the front-rear direction, the upper ends of the distribution cavities are communicated with the coating material tank through the slits, n liquid inlets communicated with the outer side wall of the tank body are arranged on the inner wall of the distribution cavities, and n is an integer greater than or equal to 1; one end of the liquid supply pipeline is communicated with the bottom of the liquid supply barrel, the other end of the liquid supply pipeline is connected with 2n shunt pipes, 2n shunt pipes are in one-to-one correspondence with 2n liquid inlets, and the other ends of the corresponding shunt pipes are communicated with the liquid inlets.
4. The optical film dimpled coating system according to claim 3, wherein the distribution chamber is a semi-cylinder extending in a front-rear direction, an inner wall of the distribution chamber is composed of an arc surface, a side surface, a front end surface and a rear end surface, the side surface is a vertical surface, the liquid inlet is disposed at a lowest position of the side surface, and a lower end of the slit is communicated with a highest position of the arc surface.
5. The optical film dimple coating system according to claim 4, wherein the arc radius R of the arc surface satisfies: r is more than or equal to 5mm and less than or equal to 10 mm; the width A of the slit satisfies the following conditions: a is more than or equal to 1mm and less than or equal to 3 mm; the flow velocity V of the coating liquid in the slit satisfies the following conditions: v is more than or equal to 0.5cm/sec and less than or equal to 3 cm/sec.
6. The optical film gravure coating system of claim 1, wherein said coating slot is an arc slot extending in the front-rear direction, and one end of said return line communicates with the lowest portion of said arc slot.
7. The optical film micro-concave coating system according to claim 6, wherein a micro-concave roller is disposed above the coating material trough, and the diameter D of the micro-concave roller satisfies: d is more than or equal to 50mm and less than or equal to 60 mm; the vertical distance H between the highest point of the arc-shaped groove and the lowest point of the arc-shaped groove satisfies the following conditions: h is more than or equal to 27mm and less than or equal to 35 mm; the vertical distance B between the lowest point of the arc-shaped groove and the lowest point of the micro-concave roller meets the following requirements: b is more than or equal to 2mm and less than or equal to 5 mm; the vertical distance L between the height of the coating liquid in the coating material groove and the lowest point of the arc-shaped groove meets the following requirements: l is more than or equal to 20mm and less than or equal to 30 mm.
8. The optical film dimple coating system according to claim 1, wherein a stirring device is disposed on the liquid supply barrel, the stirring device includes a driving motor, a stirring rod and a plurality of blades, the upper end of the stirring rod is connected with the driving motor, the lower end of the stirring rod extends into the liquid supply barrel, the plurality of blades are equally spaced at the lower end of the stirring rod along the circumferential direction, and the driving motor is used for driving the stirring rod to rotate.
9. The system of claim 1, wherein a filter is disposed in the fluid supply line between the fluid supply pump and the coating bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121092368.7U CN215354318U (en) | 2021-05-20 | 2021-05-20 | Optical film micro-concave coating system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121092368.7U CN215354318U (en) | 2021-05-20 | 2021-05-20 | Optical film micro-concave coating system |
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| CN215354318U true CN215354318U (en) | 2021-12-31 |
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| CN202121092368.7U Active CN215354318U (en) | 2021-05-20 | 2021-05-20 | Optical film micro-concave coating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117531647A (en) * | 2024-01-10 | 2024-02-09 | 靖江瑞泰电子材料有限公司 | Surface treating agent device is scribbled in SMD upper cover area |
-
2021
- 2021-05-20 CN CN202121092368.7U patent/CN215354318U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117531647A (en) * | 2024-01-10 | 2024-02-09 | 靖江瑞泰电子材料有限公司 | Surface treating agent device is scribbled in SMD upper cover area |
| CN117531647B (en) * | 2024-01-10 | 2024-04-02 | 靖江瑞泰电子材料有限公司 | Surface treating agent device is scribbled in SMD upper cover area |
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Address after: 315020 building 4, No. 988, Qingfeng Road, Cicheng Town, Jiangbei District, Ningbo City, Zhejiang Province Patentee after: Ningbo Huizhixing New Material Technology Co.,Ltd. Address before: 315020 building 4, No. 988, Qingfeng Road, Cicheng Town, Jiangbei District, Ningbo City, Zhejiang Province Patentee before: NINGBO HUGHSTAR ADVANCED MATERIAL TECHNOLOGY Co.,Ltd. |
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