Detection device for evaluating bubble quantity of ultraviolet curing type acrylic resin

Abstract

The utility model discloses a detection device for evaluating the bubble amount of ultraviolet curing type acrylic resin, and aims to overcome the defects of labor consumption and low efficiency caused by waste of manpower and time in replacement of the ultraviolet curing type acrylic resin, a cleaning liquid tank and a pre-coating roller due to repeated machine preparation in the existing scheme. The detection containers are used for loading resin, the stirring structure is used for stirring the detection containers, the heating structure is in contact with the detection containers and is used for conveying heat, the stirring structure is used for mechanically stirring the resin, the heating structure is a water bath pool, each detection container is positioned in the water bath pool, and the detection containers are transparent containers. The device is used for replacing direct loading, so that the detection efficiency is improved and the labor is reduced while the time occupation of a production line is reduced.

Description

Technical Field

[0001] The utility model relates to the field of optical films, and more particularly to a detection device for evaluating the bubble amount of ultraviolet curing acrylic resin. Background Art

[0002] Ultraviolet (UV)-curable acrylic resin is a critical component of optical films, directly impacting their image stability and yield. UV-curable acrylic resins have specific requirements for bubble generation during use; the smaller the bubbles, the better (this does not necessarily reflect defoaming performance). Bubble rupture during production can cause droplet splashing and static electricity adsorption onto the product, impacting yield.

[0003] The current development process for UV acrylic resins requires testing large quantities of the resin on a production machine to confirm bubble formation. This wastes manpower and resources, hindering the implementation process. The existing solution involves adding the UV acrylic resin to be tested into a liquid tank, installing a pre-coating roller, film mold, and coil stock to prepare the machine, and then running the machine in a mass production mode. Testing is performed at mass production machine speeds. Testing multiple UV acrylic resins requires repeated cleaning of the liquid tank and pre-coating roller. Summary of the Invention

[0004] The utility model overcomes the shortcomings of the existing solution that requires repeated preparation of the machine, resulting in a waste of manpower and time in replacing the ultraviolet curing acrylic resin, cleaning the liquid tank and the pre-coating roller, resulting in labor-intensive and low efficiency. A detection device for evaluating the bubble amount of ultraviolet curing acrylic resin is provided. The utility model can reduce the waste of manpower and time in the ultraviolet curing acrylic resin testing process, improve the verification speed of the ultraviolet curing acrylic resin, and the measurement results are closer to the actual situation of the product.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A detection device for evaluating the bubble content of ultraviolet-curable acrylic resin (hereinafter referred to as resin) includes several detection containers for loading the resin, a stirring structure for agitating the detection containers, and a heating structure that contacts the detection containers and transmits heat. The stirring structure mechanically stirs the resin. The heating structure is a water bath in which each detection container is located. The detection containers are transparent containers.

[0007] This application uses a stirring structure and a heating structure to simulate the resin state when it is put on the machine, so that the measurement results are closer to the actual situation of the product.

[0008] The transparent feature of the test container enables visual evaluation. By setting up multiple test containers, a test control group can be established to evaluate the bubble content of the resin to be tested in comparison with the control group.

[0009] The test containers are all placed in a water bath. Since the water bath has the advantage of uniform heating, the variables can be further controlled.

[0010] By using the detection device, there is no need to put the resin on the machine and waste time on cleaning the liquid tank and the pre-coating roller. Multiple resin experiments can be carried out, which greatly improves efficiency and saves labor.

[0011] Preferably, an evaluation structure is also included, which includes an ultrasonic transmitting transducer and an ultrasonic receiving transducer. The ultrasonic transmitting transducer and the ultrasonic receiving transducer are arranged on both sides of the detection container, and the ultrasonic transmitting transducer and the ultrasonic receiving transducer are electrically connected to the controller respectively. The above technical features further adopt an ultrasonic method of measuring bubbles. The controller generates an electrical signal and excites the ultrasonic transmitting transducer to radiate ultrasonic waves outward. The acoustic signal attenuated by the bubble-containing liquid is received by the ultrasonic receiving transducer and converted into an electrical signal. After that, the signal is filtered and amplified. The data acquisition card completes the analog-to-digital conversion and sends the digital signal to the computer to parameterize the bubbles. The principle of the above method is that a beam of continuous ultrasonic waves emitted by the ultrasonic transmitting transducer is received by the ultrasonic receiving transducer on the other side, and the cylindrical area between the end faces of the two transducers constitutes the acoustic resistance measurement area. For continuous waves, if the liquid passing through the measurement zone contains no bubbles, the acoustic signal received by the ultrasonic transducer remains essentially constant. Conversely, if bubbles flow through the measurement zone, they block the ultrasonic beam, reducing the signal from the ultrasonic transducer and resulting in a concave waveform envelope. The degree of concavity corresponds to the attenuation of the acoustic wave amplitude and is related to the size of the bubbles. This quantitative relationship can be obtained through experimental calibration. This method can standardize the evaluation method, allowing for a more objective assessment of the amount of bubbles generated by resin agitation.

[0012] Preferably, the stirring mechanism is an air pump, which extends through several air pipes of identical diameter into the stirring vessel below the resin liquid level. The pumped air generates bubbles that drive the resin up and down, simulating mechanical stirring. The advantage of using an air pump is that the constraint of air pipes of identical diameter ensures a consistent amount of gas introduced per unit time. This ensures consistent stirring force and duration across different testing vessels, facilitating variable control and improving detection reliability and accuracy.

[0013] Preferably, the air pipes are of the same height, and the consistency of the stirring degree of each detection container can be further ensured by controlling the height.

[0014] Preferably, the air pump is connected to several main pipes, each connected to two air pipes via a tee. Each main pipe is equipped with an on / off valve. The air pump connects to several test containers in pairs using a main pipe-to-air pipe arrangement. When testing a small number of resins, the on / off valves of the redundant main pipes can be closed to conserve air. Two main pipes are connected to provide a control group.

[0015] Preferably, a flow control valve is provided on the main pipe to adjust the gas supply volume.

[0016] Preferably, the controller is also electrically connected to the air pump and the water bath. Automated detection and evaluation are achieved through the structure.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] Replacing the machine with this device directly can reduce the time occupied by the production line, improve the inspection efficiency and reduce manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the present invention after heating and stirring are completed;

[0021] Figure 3 It is a schematic diagram of the evaluation mechanism test of the utility model;

[0022] In the picture:

[0023] Detection container 1, air pump 2, main pipe 3, air pipe 4, flow control valve 5, water bath 6, ultrasonic transmitting transducer 7, ultrasonic receiving transducer 8, control resin 9, resin A to be detected 10, resin B to be detected 11, and resin C to be detected 12. DETAILED DESCRIPTION

[0024] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0025] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0026] In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are merely relational words determined for the convenience of describing the structural relationships of the various parts or elements of the present disclosure, and do not specifically refer to any part or element in the present disclosure, and should not be understood as limitations on the present disclosure.

[0027] In this disclosure, terms such as "fixed connection," "connected," and "connection" should be interpreted broadly to mean a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediary. Relevant researchers or technicians in this field may determine the specific meaning of these terms in this disclosure based on specific circumstances, and they should not be construed as limiting this disclosure.

[0028] Example:

[0029] Ginseng Figure 1 As shown, a detection device for evaluating the bubble content of ultraviolet curing acrylic resin (hereinafter referred to as resin) includes a plurality of detection containers 1 for loading the resin, a stirring structure for stirring the detection containers 1, and a heating structure that contacts the detection containers 1 and transmits heat.

[0030] During the mechanical stirring process, the resin will generate bubbles, which will affect the molding quality of the optical film. The fewer bubbles generated, the better. In this embodiment, the incoming resin is tested and evaluated.

[0031] The test and evaluation method includes stirring the resin to assess the amount of bubbles generated. To further simulate the actual situation, it is also necessary to heat the resin and observe the amount of bubbles generated by stirring at different temperatures and heating times.

[0032] Therefore, the resin is mechanically stirred by the stirring structure. In some embodiments, the stirring structure is an air pump 2, and the air pump 2 extends into the liquid level of the resin in the stirring container through a number of air pipes 4 with the same diameter. Bubbles are generated by pumping air to drive the resin to flip up and down, simulating mechanical stirring. The advantage of using the air pump 2 is that the constraint of the air pipes 4 with the same diameter ensures that the amount of gas introduced per unit time is consistent, so that the intensity and time of stirring in different detection containers 1 can be guaranteed to be consistent, which helps to control variables and improve the reliability and accuracy of detection. 'The air pipes 4 are the same height. The consistency of the degree of stirring of each detection container 1 is further guaranteed by controlling the height.

[0033] In other embodiments, the stirring method may also be stirring by propeller blades, and the same power source is used to stir each detection container 1 to the same degree. Other mechanical stirring methods may also be included, and this application is not limited thereto.

[0034] Specifically, the air pump 2 is connected to several main pipes 3, which are connected to two air pipes 4 via a tee. Each main pipe 3 is equipped with an on / off valve. The air pump 2 connects to several test containers 1 in pairs, using a main pipe 3-air pipe 4 arrangement. When a small number of resins need to be tested, the on / off valves of the redundant main pipes 3 can be closed to conserve air. Two main pipes 3 are connected to provide a control group. The on / off valves are flow-controllable, acting as flow control valves 5, to adjust the air supply. The total number of air pipes 4 is an integer multiple of the number of main pipes 3.

[0035] The heating structure is a water bath 6 , and each detection container 1 is located in the water bath 6 .

[0036] The evaluation method involves direct observation. Therefore, the test container 1 is a transparent container. This allows for observation of bubbles within the resin through the walls of the test container 1. The observation area includes both below and above the liquid level, and the number of bubbles is compared with that of the control resin 9.

[0037] Ginseng Figure 3 As shown, in some embodiments, an evaluation structure is also included, which includes an ultrasonic transmitting transducer 7 and an ultrasonic receiving transducer 8. The ultrasonic transmitting transducer 7 and the ultrasonic receiving transducer 8 are arranged on both sides of the detection container 1 and are electrically connected to the controller. The above technical features further adopt an ultrasonic method for measuring bubbles. The controller generates an electrical signal and excites the ultrasonic transmitting transducer 7 to radiate ultrasonic waves outward. The acoustic signal, which has been attenuated by the bubble-containing liquid, is received by the ultrasonic receiving transducer 8 and converted into an electrical signal. The signal is then filtered and amplified. A data acquisition card completes analog-to-digital conversion and sends the digital signal to a computer to parameterize the bubbles. The principle of the above method is that a continuous beam of ultrasonic waves emitted by the ultrasonic transmitting transducer 7 is received by the ultrasonic receiving transducer 8 on the other side, and the cylindrical area between the end faces of the two transducers constitutes the acoustic impedance measurement area. For continuous waves, if the liquid passing through the measurement zone contains no bubbles, the acoustic signal received by ultrasonic transducer 8 remains essentially constant. Conversely, if bubbles flow through the measurement zone, they block the ultrasonic beam, reducing the signal received by ultrasonic transducer 8 and resulting in a concave waveform envelope. The degree of concavity corresponds to the attenuation of the acoustic wave amplitude and is related to the size of the bubbles. This quantitative relationship can be determined through experimental calibration. This method standardizes the evaluation method, allowing for a more objective assessment of the amount of bubbles generated by resin agitation.

[0038] In some embodiments, the controller is also electrically connected to the air pump 2 and the water bath 6. Automated detection and evaluation are achieved through the structure.

[0039] This application uses a stirring structure and a heating structure to simulate the resin state when it is put on the machine, so that the measurement results are closer to the actual situation of the product.

[0040] The transparent feature of the test container 1 enables visual evaluation. By providing a plurality of test containers 1, a test control group can be established, thereby evaluating the amount of bubbles in the resin to be tested in comparison with the control group.

[0041] The detection containers 1 are all placed in the water bath 6. Since the water bath 6 has the advantage of uniform heating, the variables can be further controlled.

[0042] By using the detection device, there is no need to put the resin on the machine and waste time on cleaning the liquid tank and the pre-coating roller. Multiple resin experiments can be carried out, which greatly improves efficiency and saves labor.

[0043] Specific to the use of this device:

[0044] The same amount of control resin 9 is contained in each detection container 1, including the control resin 9, the resin to be detected A10, the resin to be detected B11, the resin to be detected C12, ...;

[0045] Assess the number of bubbles by visual inspection or structural assessment to produce an assessment result I;

[0046] Insert the air tube 4 to the same height below the liquid level of the resin in the detection container 1;

[0047] Air pump 2 starts, driving the resin to tumble and generate bubbles;

[0048] The water bath 6 is heated to the actual production state;

[0049] Maintain the test time for 1min / 5min / 10min / 30min / 60min, stop the air pump 2, and wait for the gas generated by the air pump 2 to disappear. Figure 2 As shown, the number of bubbles is evaluated and the evaluation result II is generated;

[0050] Evaluate the resin's ability to generate bubbles based on evaluation results I and II, and determine whether the resin is qualified.

[0051] The above-described embodiments are only preferred solutions of the present invention and do not limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A detection device for evaluating the amount of bubbles in ultraviolet-curable acrylic resin, characterized in that: It includes several detection containers for loading resin, a stirring structure for stirring the detection containers, and a heating structure that contacts the detection containers and transmits heat. The stirring structure mechanically stirs the resin, and the heating structure is a water bath. Each detection container is located in the water bath. The detection container is a transparent container.

2. A detection device for evaluating the amount of bubbles in ultraviolet-curable acrylic resin according to claim 1, characterized in that: An evaluation structure is also included, which includes an ultrasonic transmitting transducer and an ultrasonic receiving transducer. The ultrasonic transmitting transducer and the ultrasonic receiving transducer are arranged on both sides of the detection container, and the ultrasonic transmitting transducer and the ultrasonic receiving transducer are electrically connected to the controller respectively.

3. The detection device for evaluating the amount of bubbles in ultraviolet-curable acrylic resin according to claim 1, wherein: The stirring structure is an air pump, which extends into the stirring container below the liquid level of the resin through a plurality of air pipes with the same diameter.

4. The device for evaluating the amount of bubbles in ultraviolet-curable acrylic resin according to claim 3, wherein: The air tubes are of the same height.

5. A detection device for evaluating the amount of bubbles in ultraviolet-curable acrylic resin according to claim 3 or 4, characterized in that: The air pump is connected to a plurality of main pipes, the main pipes are connected to two air pipes through a three-way pipe, and the main pipes are provided with switch valves.

6. The device for evaluating the amount of bubbles in ultraviolet-curable acrylic resin according to claim 5, wherein: A flow control valve is provided on the main pipe.

7. The device for evaluating the amount of bubbles in ultraviolet-curable acrylic resin according to claim 2, wherein: The controller is also electrically connected to the air pump and the water bath.

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