CN211087783U

CN211087783U - Defoaming equipment

Info

Publication number: CN211087783U
Application number: CN202020014433.3U
Authority: CN
Inventors: 阳文豪
Original assignee: Hefei Visionox Technology Co Ltd
Current assignee: Hefei Visionox Technology Co Ltd
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2020-07-24
Anticipated expiration: 2030-01-03

Abstract

The utility model relates to a deaeration equipment, include: the defoaming container is provided with a defoaming chamber for accommodating materials; the vacuum supply mechanism is communicated with the defoaming chamber and is used for keeping the defoaming chamber in a vacuum state; the spraying mechanism is positioned in the defoaming container and used for extracting and spraying the materials in the defoaming container to the wall of the defoaming chamber; and the heating mechanism is arranged on the defoaming container and used for heating the cavity wall of the defoaming cavity to a preset temperature interval. Therefore, the vacuum supply mechanism, the spraying mechanism and the heating mechanism work cooperatively, the vacuum supply mechanism can enable the defoaming chamber to form a vacuum environment to break bubbles, the spraying mechanism can spray materials on the wall of the defoaming chamber to form liquid drops, the surface area of the liquid drops is increased by using the tension of the wall of the chamber to enable the bubbles to break more easily, and the heating mechanism can enable the wall of the defoaming chamber to have higher temperature, so that the defoaming efficiency is further improved.

Description

Defoaming equipment

Technical Field

The utility model relates to a display panel makes technical field, especially relates to a deaeration equipment.

Background

With the rapid development of display technology, flexible screens with flexibility and good flexibility are widely applied to the fields of bionic electronics, electronic skins, wearable equipment, vehicle-mounted equipment, Internet of things equipment, artificial intelligence equipment and the like.

The flexible screen comprises a flexible substrate, and a driving layer group, a light emitting layer group and the like formed on the flexible substrate, wherein the flexible substrate generally comprises a substrate base plate and a PI (Polyimide) substrate layer, and the PI layer is formed by coating PI glue on the substrate base plate. The PI glue is easy to generate bubbles in the conveying process, the bubbles are remained in the PI layer and are remained along with the solidification of the PI layer, and the bubbles form bulges, so that the upper layer film layer of the PI layer is difficult to form, fall off or short circuit, the yield of the flexible screen is reduced, and the reliability problem is caused.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide a defoaming apparatus that improves the problem of the easy remaining of bubbles in the PI layer.

According to an aspect of the present application, there is provided a defoaming apparatus including:

The defoaming container is provided with a defoaming chamber for accommodating materials;

A vacuum supply mechanism which is communicated with the defoaming chamber and is used for keeping the defoaming chamber in a vacuum state; and

The spraying mechanism is positioned in the defoaming container and used for extracting and spraying the materials in the defoaming container to the wall of the defoaming chamber; and

And the heating mechanism is arranged in the defoaming container and used for heating the cavity wall of the defoaming cavity to a preset temperature range.

In one embodiment of the present invention, the substrate is,

The heating mechanism is arranged on the wall of the defoaming chamber; or

The heating mechanism is arranged on the outer side of the defoaming chamber.

In one embodiment, the predetermined temperature range is 60 ℃ to 150 ℃.

In one embodiment, the spraying mechanism comprises at least one suction inlet and at least one spray outlet;

Each suction inlet is communicated with at least one ejection port, and the central axis of each ejection port extends towards the cavity wall direction of the defoaming cavity.

In one embodiment, the spraying mechanism includes a suction port and a plurality of ejection ports communicating with the suction port, and the ejection ports are arranged at intervals.

In one embodiment, the defoaming container further comprises a feed inlet and a discharge outlet which are communicated with the defoaming chamber;

The spraying mechanism comprises a spraying pipe, and the two ends of the spraying pipe are respectively provided with the suction inlet and the spray outlet;

The one end that the spray pipe was equipped with the sunction inlet extends to be close to the deaeration chamber is equipped with the one end of discharge gate, the spray pipe is equipped with the one end of blowout port extends to be close to the deaeration chamber is equipped with the one end of feed inlet.

In one embodiment, the defoaming container comprises a defoaming container bottom wall, a defoaming container side wall extending from the edge of the defoaming container bottom wall to the same direction, and a defoaming container top wall arranged at one end of the defoaming container side wall far away from the defoaming container bottom wall;

The defoaming container bottom wall, the defoaming container side wall and the defoaming container top wall jointly enclose to form the defoaming chamber, the feed inlet is arranged on the defoaming container top wall, and the discharge outlet is arranged on the defoaming container bottom wall.

In an embodiment, the defoaming apparatus further includes a feeding control mechanism, and the feeding control mechanism is disposed in the defoaming container and is configured to control the volume of the material in the defoaming chamber to a preset volume.

In one embodiment, the feed control mechanism comprises:

The weight sensor is used for detecting the weight of the material in the defoaming container;

And the feeding control valve is arranged at the feeding hole and is used for responding to the detection data of the weight sensor to be opened or closed.

In an embodiment, the defoaming apparatus further includes a storage container including a storage chamber, and the storage chamber is communicated with the defoaming chamber through a pipeline.

Use the utility model discloses a defoaming equipment, vacuum feed mechanism, spraying mechanism and heating mechanism collaborative work, vacuum feed mechanism can make the defoaming intracavity form vacuum environment and make the bubble break, and spraying mechanism can spray the material and form the liquid drop on the chamber wall in defoaming chamber, utilizes the superficial area of the tensile increase liquid drop in chamber wall and makes the bubble change and break, and heating mechanism can make the chamber wall in defoaming chamber have higher temperature, further improves defoaming efficiency.

Drawings

Fig. 1 is a schematic structural diagram of a defoaming apparatus according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.

It will also be understood that when interpreting elements, although not explicitly described, the elements are to be interpreted as including a range of errors which are within the acceptable range of deviation of the particular values as determined by those skilled in the art. For example, "about," "approximately," or "substantially" may mean within one or more standard deviations, without limitation.

Further, in the specification, the phrase "plan view" refers to a drawing when the target portion is viewed from above, and the phrase "sectional view" refers to a drawing when a section taken by vertically cutting the target portion is viewed from the side.

Furthermore, the drawings are not 1: 1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.

With the rapid development of display technologies, flexible screens with good flexibility are widely used, and compared with the conventional display panel technologies, the flexible screens have a great advantage in being made into foldable, rollable or stretchable products. For example, can tensile flexible screen can be applied to fields such as bionical electron, electron skin, wearable equipment, mobile unit, thing networking equipment and artificial intelligence equipment.

The flexible screen comprises a flexible substrate, and a driving circuit layer, an organic light emitting layer and other film layers formed on the flexible substrate, wherein the flexible substrate generally comprises a substrate and a PI (Polyimide) layer, and the PI layer is formed by coating PI glue on the substrate. However, the inventor finds that the PI glue is easy to generate bubbles in the conveying process, the bubbles remain in the PI layer and remain along with the solidification of the PI layer, and some bubbles protrude out of the upper surface of the PI layer, so that the upper layer film of the PI layer is difficult to form, falls off or is short-circuited, the reliability problem is caused, and the yield of the flexible screen is reduced. And other bubbles are positioned inside the PI layer, so that poor packaging is easily caused in the packaging stage of the flexible screen, the reliability problem is also caused, and the yield of the flexible screen is reduced.

At present, the bubbles in the PI glue are usually removed by adopting a low-pressure defoaming method or a stirring defoaming method in the prior art, but the inventor finds that the defoaming efficiency is low and some bubbles are still difficult to remove by adopting the methods. Therefore, it is necessary to provide a defoaming apparatus 100 that improves the PI layer bubble removal efficiency and removal effect.

The following describes in detail the defoaming apparatus 100 according to an embodiment of the present invention with reference to the drawings, taking the defoaming apparatus 100 as an example to remove air bubbles in PI glue. The following examples are given by way of illustration only and are not intended to limit the scope of the present application. It is understood that in other embodiments, the defoaming apparatus 100 may also be used to remove bubbles in materials such as resin, and is not limited herein. For the purpose of illustration, the drawings show only the structures associated with embodiments of the invention.

Fig. 1 is a schematic cross-sectional view of a defoaming apparatus 100 according to an embodiment of the present invention. The defoaming apparatus 100 according to an embodiment of the present invention includes a defoaming container 20, a vacuum supply mechanism (not shown), a spraying mechanism 40, and a heating mechanism 60.

The defoaming container 20 is a hollow cylindrical shell structure, and includes a defoaming container bottom wall 21, a defoaming container side wall 23 extending from the edge of the defoaming container bottom wall 21 in the same direction, and a defoaming container top wall 25 disposed at one end of the defoaming container side wall 23 far away from the defoaming container bottom wall 21, and the defoaming container bottom wall 21, the defoaming container side wall 23 and the defoaming container top wall 25 together enclose to form a defoaming chamber 27 for accommodating PI glue. It is understood that the specific shape and size of the deaeration container 20 are not limited, and may be set to different shapes and sizes as needed.

Further, the top wall 25 of the defoaming container is provided with at least one feeding hole 252 communicating the defoaming chamber 27 with the external environment, and the bottom wall 21 of the defoaming container is provided with at least one discharging hole 212 communicating the defoaming chamber 27 with the external environment. In this way, the external conveying device is communicated with the feeding hole 252, so that the PI glue is conveyed into the defoaming chamber 27 through the feeding hole 252, and the PI glue in the defoaming chamber 27 can be discharged through the discharging hole 212 after being defoamed.

Further, in an embodiment, the bottom wall 21 of the defoaming container is provided with two discharging ports 212, one of the discharging ports 212 can be connected to other devices to convey PI glue in the defoaming chamber 27 to other devices, and the other discharging port 212 can be used for discharging a part of PI glue with poor quality. It is understood that in some embodiments, the bottom wall 21 of the deaeration container may be opened with only one outlet 212, and the outlet 212 may be used for connecting other devices and discharging a portion of the poor quality PI glue when disconnected from other devices.

In some embodiments, the defoaming apparatus 100 further includes a feeding control mechanism (not shown) disposed in the defoaming container 20, and the feeding control mechanism is configured to control the volume of the PI in the defoaming chamber 27 to a preset volume. In some embodiments, the feeding control mechanism controls the volume of the PI gel in the defoaming chamber 27 to be kept 1/3-2/3 of the total volume of the defoaming chamber 27, so as to avoid the PI gel in the defoaming chamber 27 from being too little to cause the defoaming efficiency to be too low, and simultaneously avoid the PI gel in the defoaming chamber 27 from being too much to cause the spraying mechanism 40 to be submerged.

Specifically, in one embodiment, the feed control mechanism includes a weight sensor and a feed control valve in communication therewith. The weight sensor is attached to the defoaming container bottom wall 21 and detects the weight of the defoaming container 20. The feeding control valve is installed at the feeding port 252, and the feeding control valve is used for opening or closing the detection data of the corresponding weight sensor and adjusting the flow according to the requirement. When the weight of the deaeration container 20 is less than the preset weight, it indicates that the PI gum in the deaeration chamber 27 is less, and therefore the feed control valve is in an open state to allow the PI gum in the external conveying mechanism to enter the deaeration chamber 27. When the weight of the deaeration container 20 reaches the preset weight, it indicates that the PI glue in the deaeration chamber 27 does not need to be increased further, and therefore the feed control valve is in a closed state to stop the PI glue from entering the deaeration chamber 27. It is understood that in other embodiments, the weight sensor may be replaced by a sensor such as a liquid level sensor, and the volume of the PI gel in the defoaming chamber 27 may also be obtained.

In some embodiments, the defoaming apparatus 100 further includes a discharging control mechanism for controlling the amount of PI glue discharged from the defoaming chamber 27. Specifically, in one embodiment, the discharge control mechanism includes a discharge control valve, the discharge control valve is installed at the discharge port 212, the discharge control valve can be switched between an open state and a closed state, and the flow rate can be adjusted as required.

The vacuum supply mechanism is communicated with the defoaming chamber 27 to extract air in the defoaming chamber 27, so that the defoaming chamber 27 is kept in a vacuum state, and bubbles in the vacuum environment are broken under the action of internal pressure, so that the PI glue is defoamed. In some embodiments, the vacuum supply mechanism may be a vacuum pump connected to the sidewall 23 of the defoaming container through a pipe, and the vacuum pump may continuously pump air in the defoaming chamber 27 during the defoaming process, so as to keep the defoaming chamber 27 in a vacuum state all the time.

The spraying mechanism 40 is arranged in the defoaming chamber 27 and comprises a liquid drop forming device for extracting and spraying the PI glue in the defoaming container 20 to the wall of the defoaming chamber 27, and the PI glue drop on the wall can flow downwards under the action of gravity. In this way, the PI gel sprayed to the cavity wall by the spraying mechanism 40 forms a liquid droplet in contact with the cavity wall of the defoaming cavity 27, and the surface area of the liquid droplet is increased by the tension of the cavity wall, thereby facilitating the breaking of the bubbles in the liquid droplet.

Specifically, in some embodiments, the spraying mechanism 40 includes a spraying tube extending along a vertical direction, two ends of the spraying tube are respectively provided with at least one suction port and at least one spraying port, one end of the spraying tube provided with the suction port extends to one end close to the defoaming chamber 27 and provided with the discharge port 212, one end of the spraying tube provided with the spraying port extends to one end close to the defoaming chamber 27 and provided with the feed port 252, and each suction port is communicated with at least one spraying port. In one embodiment, the spray pipe has a plurality of outlets spaced apart from each other, so as to rapidly eject a plurality of droplets. Further, since the center axis of the ejection port is directed toward the chamber wall formed by the defoaming-container side wall 23, the PI paste can be ejected onto the chamber wall formed by the defoaming-container side wall 23.

The heating mechanism 60 is installed in the defoaming container 20 and is used for heating the cavity wall of the defoaming cavity 27 to a preset temperature interval, so that the amount of gas dissolved in the PI glue is reduced, the gas discharge is facilitated, the viscosity of the PI glue is reduced, the flowing speed is increased, and the defoaming efficiency is further improved. In some embodiments, the preset temperature range of the cavity wall is 60-150 ℃, and at this temperature, the property of the PI glue is prevented from being changed due to overhigh temperature while the good defoaming effect is ensured.

In some embodiments, the heating mechanism 60 may be a heating sheet or a heating wire, and the heating mechanism 60 is disposed on the wall of the defoaming chamber 27, so that the PI glue is not contacted while the wall of the defoaming chamber 27 is heated. In other embodiments, the heating mechanism 60 is a heating wire wound outside the wall of the defoaming chamber 27, and can also perform a heating function. It is understood that the specific configuration and the arrangement position of the heating mechanism 60 are not limited, and different positions can be arranged as required to meet different heating requirements as long as the heating mechanism does not directly contact with the PI adhesive.

In some implementations, the defoaming apparatus 100 further includes a storage container 80, the storage container 80 includes a storage chamber 81, and the storage chamber 81 communicates with the discharge port 212 of the defoaming container 20 through a pipe to communicate with the defoaming chamber 27. Thus, the PI paste defoamed in the defoaming container 20 can be stored in the storage container 80 for standby and can be used as a standby defoaming container 20, so that the PI paste coated on the substrate is prevented from containing a large amount of bubbles due to the fact that the defoaming container 20 cannot work normally due to mechanical failure and the like. Further, the storage container 80 is also connected to a vacuum supply mechanism, thereby forming a vacuum environment to continue defoaming the PI gel.

In the defoaming device 100, the vacuum supply mechanism, the spraying mechanism 40 and the heating mechanism 60 work cooperatively, the vacuum supply mechanism can form a vacuum environment in the defoaming chamber 27 to break the bubbles, the spraying mechanism 40 can spray the PI glue on the wall of the defoaming chamber 27 to form liquid drops, the surface area of the liquid drops is increased by the tension of the wall of the chamber to make the bubbles more easily broken, and the heating mechanism 60 can make the wall of the defoaming chamber 27 have higher temperature to further improve the defoaming efficiency. Therefore, the defoaming equipment 100 can be used for quickly and effectively removing the bubbles in the materials such as the PI glue, so that the bubbles are effectively prevented from remaining in the PI layer, and the production yield of the display panel is effectively improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An apparatus for defoaming, comprising:

2. The defoaming apparatus according to claim 1,

The heating mechanism is arranged on the wall of the defoaming chamber; or

The heating mechanism is arranged on the outer side of the defoaming chamber.

3. The de-bubbling apparatus of claim 1, wherein the preset temperature interval is between 60 ℃ and 150 ℃.

4. The de-bubbling apparatus of claim 1, wherein the spray mechanism comprises at least one suction inlet and at least one spray outlet;

5. The defoaming apparatus of claim 4, wherein the spraying mechanism comprises a suction inlet and a plurality of spray outlets communicated with the suction inlet, and the plurality of spray outlets are arranged at intervals.

6. The defoaming apparatus of claim 4, wherein the defoaming container further comprises a feed inlet and a discharge outlet which are communicated with the defoaming chamber;

7. The defoaming apparatus of claim 6, wherein the defoaming container comprises a defoaming container bottom wall, a defoaming container side wall extending in the same direction from the edge of the defoaming container bottom wall, and a defoaming container top wall provided at one end of the defoaming container side wall away from the defoaming container bottom wall;

8. The defoaming apparatus of claim 7, further comprising a feed control mechanism provided in the defoaming container for controlling the volume of the material in the defoaming chamber to a preset volume.

9. The defoaming apparatus according to claim 8, wherein the feed control mechanism includes:

10. The defoaming apparatus according to any one of claims 1-9, further comprising a storage container including a storage chamber communicating with the defoaming chamber through a duct.