CN210399852U

CN210399852U - Air knife and drying device

Info

Publication number: CN210399852U
Application number: CN201822146632.5U
Authority: CN
Inventors: 黄永辉
Original assignee: Zhangjiagang Kangdexin Optronics Material Co Ltd
Current assignee: Zhangjiagang Kangdexin Optronics Material Co Ltd
Priority date: 2018-12-20
Filing date: 2018-12-20
Publication date: 2020-04-24
Anticipated expiration: 2028-12-20

Abstract

The utility model discloses an air knife and drying device relates to and shows technical field. This air knife includes the body, be provided with first exhaust vent and second exhaust vent on the body, first exhaust vent sets up along vertical direction, the relative vertical direction of second exhaust vent is to keeping away from the direction inclination b of first exhaust vent. This air knife includes first exhaust vent and second exhaust vent, and the slope of second exhaust vent air current is blown to the work piece, and the water stain on the dry work piece surface, the air current that first exhaust vent provided blow to the work piece perpendicularly, not only can assist the water stain on the dry work piece surface, can also prevent the work piece fluctuation from top to bottom, guarantees the stability of work piece, avoids the work piece to damage.

Description

Air knife and drying device

Technical Field

The utility model relates to a show technical field, especially relate to an air knife and drying device.

Background

In a manufacturing process of a Liquid Crystal Display (LCD), in order to obtain more uniform brightness and higher contrast, Liquid Crystal molecules in a Liquid Crystal panel need to be aligned in a certain direction by an alignment film. The alignment film is typically a Polyimide (PI) film, and is printed on the substrate by a printer.

To ensure the printing quality, the substrate needs to be cleaned and dried before printing. As shown in fig. 1, in the prior art, during the drying process, the substrate is placed on the conveying assembly 2 'for conveying, the upper and lower sides of the conveying assembly 2' are oppositely provided with the air knives 1 ', the air knives 1' are provided with the inclined air outlet holes 11 ', and the air outlet holes 11' provide air flow to the surface of the substrate 3 ', so as to blow off water on the surface of the substrate 3'. However, the existing air knife 1 ' has poor drying effect, the surface of the substrate 3 ' has water stain generated by residual water vapor, and the substrate 3 ' is easy to fluctuate up and down in the cleaning process, so that the risk of fragment is easy to occur.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an air knife, this air knife's drying effect is good, can prevent that the work piece from fluctuating from top to bottom.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides an air knife, includes the body, be provided with first exhaust vent and second exhaust vent on the body, first exhaust vent sets up along vertical direction, the relative vertical direction of second exhaust vent is to keeping away from the direction inclination b of first exhaust vent.

Wherein the angle b is 35-50 deg.

Wherein the body is made of stainless steel.

The body is further provided with a third air outlet, and the third air outlet is parallel to the second air outlet and is located between the first air outlet and the second air outlet.

The body is in a long strip shape, and the first air outlet and the second air outlet are both long strip holes extending along the length direction of the body.

Another object of the utility model is to provide a drying device, drying effect is good, can prevent that the work piece from fluctuating from top to bottom.

the drying device comprises a conveying assembly and the air knives, wherein the conveying assembly is used for conveying workpieces, the air knives are arranged on two opposite sides of the conveying assembly, and the air knives are arranged right opposite to the air knives on two sides of the conveying assembly.

Wherein the distance between the air knife and the conveying component is 0.12-0.15 mm.

And the second air outlet is inclined towards the conveying direction deviating from the conveying assembly.

The length direction of the body and the conveying direction of the conveying assembly form an included angle a.

Wherein the included angle a is 70-74 degrees.

Has the advantages that: the utility model provides an air knife and drying device. This air knife includes first exhaust vent and second exhaust vent, and the slope of second exhaust vent air current is blown to the work piece, and the water stain on the dry work piece surface, the air current that first exhaust vent provided blow to the work piece perpendicularly, not only can assist the water stain on the dry work piece surface, and the relative perpendicular air current that sets up can also prevent the work piece fluctuation from top to bottom moreover, guarantees the stability of work piece, avoids the work piece to damage.

Drawings

FIG. 1 is a schematic view of a prior art drying apparatus;

fig. 2 is a plan view of a drying apparatus provided in embodiment 1 of the present invention;

fig. 3 is a front view of a drying apparatus provided in embodiment 1 of the present invention;

fig. 4 is a front view of a drying device according to embodiment 2 of the present invention.

Wherein:

1. a body; 11. a first air outlet; 12. a second air outlet hole; 13. a third air outlet; 2. a transfer assembly; 21. a roller; 3. a substrate;

1', air knife; 11', an air outlet hole; 2', a transmission component; 3', and a substrate.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

Example 1

The embodiment provides a drying device, which can blow away water on the surface of a workpiece through air flow generated by an air knife, thereby achieving the effect of drying the workpiece. The air knife utilizes the precise air flow control to form uniform and smooth high-speed fluid on the surface of an object to be dried, at the moment, the surface of the object forms a Bernoulli low-pressure state, the low-pressure state can absorb the moisture and pollutants on the surface and in holes of the object, and after the moisture and the pollutants leave the object and are attached, the moisture and the pollutants are blown away along the direction of the fluid, so that the drying effect with extremely high efficiency can be achieved. The drying device can be arranged in a cleaning device with a water washing function and used for drying workpieces after water washing. In this embodiment, the drying device may be applied to a substrate cleaning apparatus used in a liquid crystal panel manufacturing process, so as to ensure drying of the substrate surface and ensure printing quality of the alignment film.

As shown in fig. 2 and 3, the drying apparatus includes a conveying assembly 2 and an air knife. Conveying assembly 2 is used for bearing and transporting base plate 3, and the air knife that conveying assembly 2's upper and lower both sides all set up, and the air current that the air knife provided blows to base plate 3 surface, and base plate 3 removes along with conveying assembly 2 to blow off base plate 3 with the water of the upper and lower surface of base plate 3, reach the purpose of dry base plate 3. In order to improve the stability of the substrate 3, the air ducts arranged up and down are opposite to each other so as to balance the stress of the substrate 3.

In this embodiment, the air knife includes body 1 and the exhaust vent of setting on body 1, and the exhaust vent sets up towards transport assembly 2. For the improvement to the drying effect of base plate 3, avoid that the subregion does not contact the air current and have water stain to remain, body 1 of air knife can be rectangular shape, and the exhaust vent can be rectangular hole. For convenience of description, the elongated body 1 may be disposed substantially along the width direction of the substrate 3 by taking the dimension of the substrate 3 along the transfer direction of the transfer module 2 as a length and the dimension perpendicular to the transfer direction of the transfer module 2 as a width. The exhaust vent can extend along the length direction of body 1 to make base plate 3 along the width direction homoenergetic receive the air current that the air knife produced, thereby improve drying effect.

As shown in fig. 2, the length direction of the main body 1 of the air knife and the direction of the conveying assembly 2 (i.e. the width direction of the substrate 3) form an included angle a, so that the water on the substrate 3 can drop from the side surface of the substrate 3 extending in the length direction after being pushed by the air flow, and leave the surface of the substrate 3, which is beneficial to improving the drying effect.

In this embodiment, the included angle a should not be too large or too small. When contained angle a was too big, the air current was less to the thrust of the 3 upper waters of base plate, influences the dynamics of air current, leads to having steam to remain on the base plate 3, forms the water stain to the printing effect of orientation membrane is influenced. When the included angle a is too small, the water moves substantially along the length direction of the substrate 3 under the action of the air flow, so that the water remains on the surface of the substrate 3, and the drying effect of the substrate 3 is affected. Alternatively, the angle a may be 70 ° -74 °, e.g. 70 °, 71 °, 72 °, 73 °, 74 °.

To facilitate the water flow to be pushed away from the surface of the substrate 3, the air outlet of the air knife comprises a second air outlet 12 inclined at an angle b with respect to the vertical direction. The air flow provided by the second air outlet 12 is obliquely blown to the surface of the substrate 3, and has a component force parallel to the surface of the substrate 3 to the water on the surface of the substrate 3, thereby pushing the water to flow to leave the surface of the substrate 3. Alternatively, the angle b may be 35 ° -50 °, e.g. 35 °, 36 °, 37 °, 38 °, 39 °, 40 °, 41 °, 42 °, 43 °, 45 °, 46 °, 47 °, 48 °, 49 °, 50 °.

To improve the drying effect of the substrate 3, the conveying direction of the substrate 3 and the flowing direction of the air flow provided by the second air outlet 12 may be opposite. Taking the direction of fig. 2 as an example, the substrate 3 moves rightwards under the action of the conveying assembly 2, and the airflow generated by the second air outlet 12 can flow leftwards approximately, so that the pushing effect of the airflow on the substrate 3 is improved, and the residual water stain on the substrate 3 is avoided.

Because the upper and lower surfaces of the substrate 3 need to be dried, in order to enable the air flow generated by the air knife below to be in contact with the substrate 3, the conveying assembly 2 needs to expose the lower surface of the substrate 3 on the basis of bearing the substrate 3, so as to achieve the purpose of drying.

As shown in fig. 3, in the embodiment, the conveying assembly 2 includes a plurality of rollers 21 arranged in parallel and at intervals, the axes of the rollers 21 are perpendicular to the conveying direction, the substrate 3 is placed on the plurality of rollers 21, and the rollers 21 drive the substrate 3 to move when rotating. Each roller 21 is fixed in position with a gap between adjacent rollers 21. In the transfer process of the substrate 3, the part of the lower surface of the substrate 3, which is positioned in the gap between the adjacent rollers 21, can be in contact with the air flow generated by the air knife, and in the transfer process of the substrate 3, the regions of the substrate 3 corresponding to the gaps are continuously changed, so that each region on the lower surface of the substrate 3 can be in contact with the air flow, and the drying effect of the lower surface is ensured.

In other embodiments, the transfer module 2 may have other structures as long as the drying effect of the lower surface of the substrate 3 can be ensured.

Because the upper and lower surface of base plate 3 all contacts with the air current, the air current slope that second exhaust vent 12 produced blows to base plate 3 moreover for base plate 3 is undulant from top to bottom easily in the drying process, and the poor stability of base plate 3 appears the problem of fragmentation easily.

In order to solve the above problem, as shown in fig. 3, the body 1 of the present embodiment is further provided with a first air outlet 11, and the first air outlet 11 is vertically disposed. The air current that first exhaust vent 11 produced blows to base plate 3 perpendicularly, with the cooperation of second exhaust vent 12, on the one hand can improve the intensity of air current, thereby improve base plate 3's drying effect, on the other hand, the vertical air current that two upper and lower air knives provided is just to setting up, the air current of cooperation slope, each side surface that can make base plate 3 all receives the effect of two strands of air currents, make base plate 3's atress relatively even, certain one end atress along the direction of transfer of conveying subassembly 2 of avoiding base plate 3 is less and the perk, thereby prevent that base plate 3 from fluctuating from top to bottom, improve base plate 3's stability, thereby avoid base plate 3 broken piece, guarantee base plate 3's quality.

In order to avoid the mutual interference of the air flows generated by the first air outlet 11 and the second air outlet 12, the second air outlet 12 can be inclined towards the direction far away from the first air outlet 11. The air current that second exhaust vent 12 produced promotes the rivers that go up on the base plate 3 and flow, and the air current that first exhaust vent 11 produced not only can avoid base plate 3 fluctuation from top to bottom, can also assist supplyes, strengthens the air current that second exhaust vent 12 produced, is favorable to improving the cleaning performance.

In this embodiment, the distance of air outlet apart from base plate 3 is unsuitable big, avoids the intensity of air current to weaken in transmission process to guarantee the drying effect of air current to base plate 3. Alternatively, the distance between the air knife and the transfer assembly 2 may be 0.12-0.15mm, such as 0.12mm, 0.13mm, 0.14mm, 0.15 mm.

Because the air knife works in a humid environment for a long time, impurities such as rust and the like are doped in the air flow in order to prevent the air knife from rusting, the air knife can be made of stainless steel materials, so that the air knife is prevented from rusting, the service life of the air knife is prolonged, and the drying effect on the substrate 3 is favorably improved.

Example 2

Because the air outlet is a long-strip-shaped hole, the air flow generated by the air outlet is long and unstable, when the conveying speed of the substrate 3 is too high or the air flow is weak, the air flow generated by the second air outlet 12 will generate a backflow phenomenon on the surface of the substrate 3, that is, part of the air flow generated by the second air outlet 12 flows from the rear side to the front side of the second air outlet 12, wherein the front side and the rear side are the front side and the rear side of the flow direction of the air flow generated by the second air outlet. The backflow phenomenon of the gas will affect the accumulated water on the surface of the airflow blow-drying substrate 3, resulting in water stain residue.

To solve the above problem, as shown in fig. 4, the present embodiment provides a drying device, which has substantially the same structure as that of embodiment 1, except that a third air outlet 13 is further provided on the main body 1 of the air knife. The third air outlet 13 can be arranged in parallel with the second air outlet 12 and located between the second air outlet 12 and the first air outlet 11, and is used for supplementing and strengthening air flow generated by the second air outlet 12, improving strength of the air flow and avoiding backflow.

In this embodiment, the third air outlet 13 is provided to improve the strength of the air flow, so that the backflow phenomenon can be avoided, and the conveying speed of the substrate 3 can be relatively increased, thereby improving the drying efficiency. Specifically, in the present embodiment, the conveyance speed of the substrate 3 may be up to 8000 mm/min.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. The air knife comprises a body (1), and is characterized in that a first air outlet (11) and a second air outlet (12) are arranged on the body (1), the first air outlet (11) is arranged along the vertical direction, and the second air outlet (12) is inclined at an angle b relative to the vertical direction and far away from the first air outlet (11);

the angle b is 35-50 degrees.

2. Air knife according to claim 1, characterised in that the body (1) is made of stainless steel.

3. The air knife according to claim 1 or 2, characterized in that the body (1) is further provided with a third air outlet (13), and the third air outlet (13) is parallel to the second air outlet (12) and is located between the first air outlet (11) and the second air outlet (12).

4. The air knife according to claim 1 or 2, characterized in that the body (1) is elongated and the first air outlet (11) and the second air outlet (12) are both elongated holes extending along the length direction of the body (1).

5. Drying device comprising a conveyor assembly (2) for conveying workpieces, characterized in that it further comprises air knives according to any one of claims 1 to 4, said air knives being arranged on opposite sides of said conveyor assembly (2), and said air knives on opposite sides of said conveyor assembly (2) being arranged facing each other.

6. Drying apparatus according to claim 5, characterised in that the distance between the air knife and the conveyor assembly (2) is 0.12-0.15 mm.

7. Drying apparatus according to claim 5, characterised in that said second outlet vents (12) are inclined away from the conveying direction of said conveying assembly (2).

8. Drying apparatus according to claim 5, characterised in that the length direction of the body (1) is arranged at an angle a to the conveying direction of the conveying assembly (2).

9. Drying apparatus according to claim 8 in which the included angle a is from 70 ° to 74 °.