Seal strip non-dry adhesive measuring test device

Abstract

The application provides a sealing strip non-dry glue measurement test device, and belongs to the technical field of sealing strip measurement, and comprises an environment box and a sealing strip cutting tool, the environment box is provided with a cooling medium inlet and a cooling medium outlet; the sealing strip cutting tool comprises a linear actuator installed above the environment box, a lower tool installed at the bottom of the environment box, an upper tool installed on the actuator rod of the linear actuator, and a cutting knife installed on the upper tool; the lower tool is provided with a positioning groove matched with the sealing strip. The application forms a low-temperature environment in the environment box by sending in the cooling medium, can quickly cool the non-dry glue injected into the sealing strip, obtain a neat measurement profile of the non-dry glue layer, then observe the whole measurement profile by using a microscope, and then the shape and height of the non-dry glue layer can be accurately measured, compared with the point test mode, the accuracy and reliability of measurement are improved, and then the sealing effect can be accurately controlled, and the sealing performance of the vehicle body is improved.

Description

Technical Field

[0001] This application belongs to the field of sealing strip measurement technology, and more specifically, relates to a sealing strip self-adhesive measurement and testing device. Background Technology

[0002] Automotive sealing strips are widely used rubber accessories in automobiles. They have functions such as sealing the car body, sound insulation, dust prevention, waterproofing, shock absorption, and decoration. They play an important role in improving the comfort and safety of driving and riding in the car, and protecting the car body and interior components.

[0003] Gaps of varying sizes exist between the sheet metal parts of a car body, allowing rainwater to easily seep into the vehicle and cause seal failure. Therefore, some sealing strips require the injection of sealing adhesive into the clamping groove to prevent water leakage from these gaps. However, since sealing adhesive is a viscous fluid, the amount injected directly affects the sealing effect; therefore, accurate measurement of the adhesive's shape and height is necessary.

[0004] Currently, the industry mostly uses probes to directly insert into the injected self-adhesive to measure the height of the sealed self-adhesive. This measurement method has a large deviation, can only test at a point, and cannot measure the height and shape of the self-adhesive in the entire cross section, thus making it impossible to control the sealing effect. Utility Model Content

[0005] The purpose of this application is to provide a sealing strip self-adhesive measurement and testing device, which aims to solve the problem that the shape and height of the self-adhesive injected into the sealing strip cannot be accurately measured, resulting in the inability to accurately control the sealing effect.

[0006] To achieve the above objectives, the technical solution adopted in this application is: to provide a sealing strip self-adhesive measurement and testing device, including: an environmental chamber and a sealing strip cutting fixture, wherein the environmental chamber is provided with a cooling medium inlet and a cooling medium outlet; The sealing strip cutting fixture includes a linear actuator mounted on top of the environmental chamber, a lower fixture disposed at the bottom of the environmental chamber, an upper fixture mounted on the actuator rod of the linear actuator, and a cutting blade mounted on the upper fixture; the lower fixture is provided with a positioning groove adapted to the sealing strip; The cooling medium supplied through the cooling medium inlet rapidly cools the self-adhesive injected into the sealing strip. The linear actuator pushes the upper tooling in the environmental chamber to move downward, cutting off the sealing strip and the cooled self-adhesive layer arranged on the lower tooling, and obtaining a measurement profile of the self-adhesive layer.

[0007] The beneficial effects of the sealing strip self-adhesive measurement and testing device provided in this application are as follows: Compared with the prior art, the sealing strip self-adhesive measurement and testing device of this application, by introducing a cooling medium, forms a low-temperature environment in the environmental chamber. The cooling medium can quickly cool the self-adhesive injected into the sealing strip. After the self-adhesive cools and solidifies to form a self-adhesive layer, in the low-temperature environment, a linear actuator is used to push the upper fixture downward to cut the sealing strip and the self-adhesive layer, thereby obtaining a neat and flat measurement profile of the self-adhesive layer. Then, the entire measurement profile is observed with a microscope, which can accurately measure the shape and height of the self-adhesive layer injected into the sealing strip, improving the accuracy and reliability of the measurement, providing a strong guarantee for product quality control, and thus helping to accurately control the sealing effect and improve the sealing performance of the vehicle body.

[0008] Because sealing strips and self-adhesive materials are flexible and have a certain degree of stickiness at room temperature, it is not easy to cut a flat cross-section. However, at low temperature, it is easy to cut a flat cross-section, which makes it easier to observe and measure.

[0009] In one possible implementation, the lower tooling is further provided with a guide groove for the cutting blade to move downwards and cut.

[0010] In the above technical solution, the guide groove is set to guide the downward-moving cutting blade, ensuring that the cutting blade cuts the sealing strip vertically and accurately, cutting a vertical cross-section. This can prevent the cutting blade from deviating downward and cutting an inclined cross-section. If an inclined cross-section is cut, it will affect the measurement accuracy and ultimately affect the sealing effect.

[0011] In one possible implementation, the upper tooling is provided with a clearance groove to avoid the sealing strip, and the upper tooling moves downward along the guide groove; the cutting blade is embedded in the upper tooling.

[0012] In the above technical solution, because a clearance groove is provided on the upper tooling, the upper tooling can move downward with the cutting blade into the guide groove and continue to move downward. When the upper tooling and the sealing strip intersect, the sealing strip will enter the clearance groove. This can protect the very thin cutting blade and prevent it from bending or breaking when it moves downward to cut.

[0013] Therefore, this design means that the upper fixture not only serves as a fixed support for the cutting blade, but also protects the cutting blade since the entire cutting blade can be embedded in the upper fixture. Furthermore, it also reduces the vertical height of the upper fixture and the cutting blade when they are exposed, which helps to reduce the restricted space for cutting operations and facilitates the miniaturization of the environmental chamber.

[0014] In one possible implementation, the upper tooling is provided with a slot for mounting the cutting blade, and the cutting edge of the cutting blade is flush with the lower surface of the upper tooling; the bottom of the guide groove is flush with the bottom of the positioning groove.

[0015] In the above technical solution, the upper tooling is used to fix the cutting blade. The height of the slot for fixing the cutting blade is the same as the height of the cutting blade itself. In this way, if overpressure occurs during the punching process, it can protect the cutting blade and prevent the blade from being damaged due to excessive force, thus extending the service life of the cutting blade.

[0016] In one possible implementation, two cutting blades are spaced apart on the upper tooling to cut out the sealing strip segments to be measured.

[0017] In the above technical solution, two cutting blades press down and cut out two measuring sections of the sealing strip simultaneously with the upper tooling. Therefore, multiple measuring sections can be cut out at one time. By measuring different measuring sections, the accuracy of measuring the shape and height of the adhesive layer can be improved.

[0018] In one possible implementation, the linear actuator is any one of a pneumatic cylinder, an electric actuator, or a hydraulic cylinder. Using such a linear actuator requires only the selection of a suitable model for purchase; it is simple and convenient to use, allows for rapid assembly, and is reliable in operation.

[0019] In one possible implementation, the inner wall of the environmental chamber is provided with a thermal insulation layer. This thermal insulation layer prevents external heat from entering the environmental chamber and also prevents cold air from entering the chamber, thus avoiding interference from the external environment and maintaining a low-temperature operating environment within the chamber. It also reduces the consumption of cold sources, thereby lowering energy consumption.

[0020] In one possible implementation, a temperature sensor is installed inside the environmental chamber.

[0021] A temperature sensor collects real-time ambient temperature data within the environmental chamber and adjusts the operation of the solenoid valves on the cooling medium delivery pipeline and the pneumatic valves controlling the cylinders based on the temperature. The solenoid valves for the cooling medium are interlocked with the temperature sensor via the controller, enabling rapid temperature regulation within the environmental chamber. When the system requires cooling, the solenoid valves open according to the controller's command, allowing liquid nitrogen to rapidly enter the environmental chamber and quickly lower the temperature. This ensures that the liquid nitrogen supply matches the cooling rate, achieving a rapid and stable cooling effect.

[0022] In one possible implementation, a protective door is provided on one side of the environmental chamber, and a transparent observation window is provided on the protective door. The observation window is fitted with transparent glass so that the cutting process inside the environmental chamber can be observed in real time from outside the chamber, allowing for timely adjustments.

[0023] In one possible implementation, a support base is provided at the bottom of the environmental chamber, and the lower tooling is fixed to the support base; a pressure plate is fixed to the end of the actuator rod of the linear actuator, and the upper tooling is fixed to the lower surface of the pressure plate. This installation method provides strong support for the lower tooling to withstand the impact force of the upper tooling moving downwards, while also providing reliable support for the upper tooling, enabling the cutting blade to move downwards synchronously and stably with the upper tooling, ensuring cutting accuracy. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A three-dimensional structural schematic diagram (front view) of the sealing strip self-adhesive measuring and testing device provided in the embodiments of this application; Figure 2 A three-dimensional structural schematic diagram (side view) of the sealing strip self-adhesive measuring test device provided in the embodiments of this application; Figure 3 A three-dimensional structural diagram of the sealing strip self-adhesive measuring and testing device provided in the embodiments of this application, showing the cutting and trimming state; Figure 4 A three-dimensional structural diagram of the upper tooling in the raised state provided in an embodiment of this application; Figure 5 This is a three-dimensional structural diagram of the upper tooling used in the embodiments of this application; Figure 6 This is a three-dimensional structural diagram of the lower tooling used in the embodiments of this application.

[0026] In the diagram: 1. Linear actuator; 2. Environmental chamber; 201. Cooling medium outlet; 202. Cooling medium inlet; 3. Temperature sensor; 4. Protective door; 401. Observation window; 5. Support base; 6. Lower fixture; 601. Positioning groove; 602. Guide groove; 7. Cutting blade; 8. Upper fixture; 801. Clearance groove; 802. Slot; 9. Pressure plate; 10. Sealing strip; 11. Adhesive layer. Detailed Implementation

[0027] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0028] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on that other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a few" means two or more, unless otherwise explicitly specified.

[0030] It should be noted that the directions or positional relationships indicated by "front", "rear", "inner", "outer", "up", and "down" in this embodiment are based on the vehicle's own orientation. The front of the vehicle represents "front", the rear of the vehicle represents "rear", the top of the vehicle represents "up", the bottom of the vehicle represents "down", the "inner" side refers to the side facing the driver's cab, and the "outer" side refers to the side facing the driver's cab.

[0031] In addition, the front-rear direction of the vehicle body defined in the embodiments of this application refers to the front-rear direction of the vehicle's forward direction during driving; the left-right direction of the vehicle body defined refers to the left-right direction of the vehicle's forward direction during driving; and the up-down direction of the vehicle body defined refers to the up-down direction of the vehicle's forward direction during driving.

[0032] Please refer to the following: Figures 1 to 6 The sealing strip self-adhesive measuring and testing device provided in this application is now described. The sealing strip self-adhesive measuring and testing device includes: an environmental chamber 2 and a sealing strip 10 cutting fixture. The environmental chamber 2 is provided with a cooling medium inlet 202 and a cooling medium outlet 201. The sealing strip 10 cutting fixture includes a linear actuator 1 installed above the environmental chamber 2, a lower fixture 6 located at the bottom of the environmental chamber 2, an upper fixture 8 installed on the actuator rod of the linear actuator 1, and a cutting blade 7 installed on the upper fixture 8; the lower fixture 6 is provided with a positioning groove 601 adapted to the sealing strip 10. The cooling medium supplied through the cooling medium inlet 202 rapidly cools the self-adhesive layer injected into the sealing strip 10. The linear actuator 1 pushes the upper fixture 8 in the environmental chamber 2 to move downward, cutting off the sealing strip 10 and the cooled self-adhesive layer 11 arranged on the lower fixture 6, and obtaining the measurement profile of the self-adhesive layer 11.

[0033] The beneficial effects of the self-adhesive sealing strip measurement and testing device provided in this application are as follows: Compared with the prior art, by introducing a cooling medium to create a low-temperature environment in the environmental chamber 2, the self-adhesive injected into the sealing strip 10 can be rapidly cooled by the cooling medium. After the self-adhesive cools and solidifies to form a self-adhesive layer 11, the linear actuator 1 pushes the upper fixture 8 downward to cut the sealing strip 10 and the self-adhesive layer 11, thereby obtaining the measurement profile of the self-adhesive layer 11. Then, the entire measurement profile is observed using a microscope, which can accurately measure the shape and height of the self-adhesive layer 11 injected into the profile of the sealing strip 10. Compared with point testing, this improves the accuracy and reliability of the measurement, provides a strong guarantee for product quality control, and helps to accurately control the sealing effect and improve the sealing performance of the vehicle body. At the same time, the rapid cooling and solidification of the self-adhesive using a cooling medium greatly shortens the time required for natural cooling at room temperature, reduces the measurement time, and improves the measurement efficiency.

[0034] Because sealing strips and self-adhesive materials are flexible and have a certain degree of stickiness at room temperature, it is not easy to cut a flat cross-section. However, at low temperature, it is easy to cut a flat cross-section, which makes it easier to observe and measure.

[0035] The environmental chamber 2 is equipped with a cooling medium inlet 202 and a cooling medium outlet 201. The introduction of cooling medium provides a low-temperature cooling environment for the sealing strip 10 inside the environmental chamber 2, facilitating rapid cooling and shaping of the adhesive and making it easier to cut. For easy connection to an external cold source, both the cooling medium inlet 202 and the cooling medium outlet 201 are equipped with quick-connect fittings. These quick-connect fittings can be fixed to the environmental chamber 2 via threaded connections and sealed with sealing rings or sealing tape to prevent leakage.

[0036] The cooling medium can be liquid nitrogen. Cryogenic liquid nitrogen is introduced into the environmental chamber 2 through the cooling medium inlet 202. After vaporization, the cryogenic liquid nitrogen is discharged from the cooling medium outlet 201. Liquid nitrogen can be used to quickly freeze and set the self-adhesive label. The cutting blade can quickly cut a flat cross-section in this low-temperature environment, thereby improving the accuracy of measurement.

[0037] The cooling medium can be low-temperature air, low-temperature carbon dioxide, low-temperature cooling water, etc. After injecting the self-adhesive into the sealing strip 10, the cooling medium is continuously circulated into the environmental chamber 2 to maintain a certain low-temperature environment inside the environmental chamber 2, allowing the self-adhesive to cool rapidly. After this, the flow of the cooling medium is stopped, and then the strip can be cut. After cutting, the environmental chamber 2 is opened, the cut sealing strip 10 is taken out, and the shape and height of the self-adhesive layer 11 are measured under a microscope.

[0038] Both the upper fixture 8 and the lower fixture 6 are made of nylon, stainless steel, or aluminum alloy. The lower fixture 6 secures the sealing strip 10 to prevent it from shifting during the punching process. Both the upper fixture 8 and the lower fixture 6 can be bolted to the corresponding linear actuator 1 or the environmental chamber 2. Since the lower fixture 6 is fixed to the bottom of the environmental chamber 2 and is supported by it, it only needs to be limited in place around its four sides. Therefore, fixing the lower fixture 6 only requires positioning corner plates at its four corners or positioning blocks on its four sides to prevent it from wobbling horizontally, and bolts are not required.

[0039] The cutting blade 7 is made of 75# steel, 45# steel or alloy steel, which has high hardness and wear resistance, making it suitable for punching operations. It can maintain a sharp cutting edge in low-temperature environments to ensure punching quality.

[0040] In some embodiments, see Figures 4 to 6 As shown, the lower fixture 6 is also equipped with a guide groove 602 for the downward movement of the cutting blade 7. The guide groove 602 guides the downward-moving cutting blade 7, ensuring that the cutting blade 7 cuts the sealing strip 10 vertically and accurately, creating a vertical cross-section. This prevents the cutting blade 7 from deviating downwards and creating an inclined cross-section, which would affect the measurement accuracy and ultimately the sealing effect.

[0041] As a way of fixing and configuring the cutting blade 7, the cutting blade 7 can be fixed to the upper fixture 8 by bolts. The cutting edge of the cutting blade 7 is exposed below the upper fixture 8. When the upper fixture 8 moves downward, only the cutting blade 7 enters the guide groove 602. When the cutting blade 7 cuts the sealing strip 10, the lower surface of the upper fixture 8 just contacts the upper surface of the lower fixture 6 or does not contact the upper surface of the lower fixture 6, so as to ensure that the cutting blade 7 cuts the sealing strip 10.

[0042] In some embodiments, see Figures 3 to 6As shown, the upper tooling 8 is provided with a clearance groove 801 to avoid the sealing strip 10. The upper tooling 8 moves downward along the guide groove 602. Because of the clearance groove 801 on the upper tooling 8, the upper tooling 8 moves downward with the cutting blade 7 into the guide groove 602 and continues to move downward. When the upper tooling 8 intersects with the sealing strip 10, the sealing strip 10 enters the clearance groove 801. The clearance groove 801 on the upper tooling 8 ensures that the sealing strip 10 does not interfere with the upper tooling 8 as it moves downward. At the location of the clearance groove 801 on the upper tooling 8, the cutting blade 7 can cut the sealing strip 10; while the guide groove 602 guides the upper tooling 8. In the above scheme, the cutting blade 7 can be partially exposed below the upper fixture 8, and the lower end face of the cutting blade 7 can also be flush with the lower surface of the upper fixture 8. When the upper fixture 8 contacts the bottom of the positioning groove 601 of the lower fixture 6, the cutting blade 7 also cuts the sealing strip 10 at the same time. This can protect the very thin cutting blade 7 and prevent the cutting blade 7 from bending or breaking when it moves downward to cut.

[0043] Therefore, this design makes the upper fixture 8 not only a fixed support for the cutting blade 7, but also a protective function for the cutting blade 7, since the cutting blade 7 can be fully embedded in the upper fixture 8. Furthermore, it also reduces the vertical height of the upper fixture 8 and the cutting blade 7 when they are exposed, which is conducive to reducing the restricted space for cutting operations and miniaturizing the environmental box 2.

[0044] In some embodiments, see Figures 3 to 6 As shown, the upper tooling 8 is provided with a slot 802 for mounting the cutting blade 7, and the blade of the cutting blade 7 is flush with the lower surface of the upper tooling 8; the bottom of the guide groove 602 is flush with the bottom of the positioning groove 601.

[0045] The upper fixture 8 is used to fix the cutting blade 7. The height of the slot 802 for fixing the cutting blade 7 is the same as the height of the cutting blade 7 itself. In this way, if overpressure occurs during the punching process, it can protect the cutting blade 7 and prevent the blade from being damaged due to excessive force, thus extending the service life of the cutting blade.

[0046] The height mentioned here refers to the vertical direction.

[0047] In some embodiments, see Figures 3 to 4 As shown, two cutting blades 7 are installed at intervals on the upper fixture 8 to cut out the sealing strip segments to be measured. The two cutting blades 7 press down simultaneously with the upper fixture 8 to cut out multiple measurement profiles of the sealing strip 10. Therefore, multiple measurement profiles can be cut at once. By measuring different profiles and comparing the results, the accuracy of measuring the shape and height of the adhesive layer 11 can be improved. (The figure shows three cutting blades, which can cut six measurement profiles at once, obtaining measurement data from different profiles, further improving measurement accuracy.) In some embodiments, see Figure 1 and Figure 2 As shown, the linear actuator 1 can be any one of a pneumatic cylinder, an electric push rod, or a hydraulic cylinder. Using this linear actuator 1, only the appropriate model needs to be selected for purchase; it is simple and convenient to use, can be quickly assembled, and operates reliably.

[0048] The cylinder of the linear actuator 1 can be fixed to the top of the environmental chamber 2 with bolts. The top of the environmental chamber 2 is provided with a through hole for sliding engagement of the actuator rod. The sliding engagement between the actuator rod and the through hole must ensure the smooth up and down movement of the actuator rod, and also avoid gaps or poor sealing between the actuator rod and the through hole, which would prevent the temperature inside the environmental chamber 2 from being kept low or cause waste of cooling medium.

[0049] In some embodiments, combined with Figure 1 and Figure 2 As shown, the inner wall of the environmental chamber 2 is equipped with a thermal insulation layer (not marked in the figure). The thermal insulation layer prevents external heat from entering the environmental chamber 2 and also prevents cold air from entering the environmental chamber 2. This avoids interference from the external environment, maintains a low-temperature operating environment inside the environmental chamber 2, and also reduces the consumption of cold sources, thereby reducing energy consumption.

[0050] The thermal insulation layer can be one of the following: silicate insulation material, ceramic insulation material, extruded polystyrene board, polyurethane insulation board, EPS foam board, rubber and plastic sponge, polyethylene, etc., sandwiched inside the environmental chamber 2. Installing a thermal insulation layer or using an insulated chamber is a conventional technique in this field; existing commonly used insulation materials can be used here.

[0051] In some embodiments, see Figure 1 As shown, a temperature sensor 3 is installed inside the environmental chamber 2.

[0052] Temperature sensor 3 collects real-time ambient temperature data within the environmental chamber 2 and adjusts the operation of the solenoid valve on the cooling medium delivery pipeline and the pneumatic valve controlling the cylinder's movement based on the temperature. Temperature sensor 3 also collects real-time temperature data from the insulation module. When the temperature inside the environmental chamber 2 exceeds -80℃, the controller, after acquiring the temperature data from temperature sensor 3, sends a command to the solenoid valve to open it, allowing liquid nitrogen to enter the environmental chamber 2 for cooling. When the temperature reaches -80℃, the controller commands the solenoid valve to close, stopping the liquid nitrogen supply. Furthermore, after maintaining the temperature at -80℃ for 3-5 minutes, a command is sent to the pneumatic valve, extending the cylinder's actuator rod and driving the cutting blade 7 to perform the punching operation.

[0053] The solenoid valve for the cooling medium is interlocked with the temperature sensor 3 by the controller, enabling rapid temperature regulation within the environmental chamber 2. When the system requires cooling, the solenoid valve opens according to the controller's command, and liquid nitrogen rapidly enters the space inside the environmental chamber 2, quickly lowering the temperature inside the chamber to -80℃. This ensures that the supply of liquid nitrogen matches the cooling rate, achieving a rapid and stable cooling effect. The thermal insulation layer inside the environmental chamber 2 has excellent thermal insulation performance, ensuring that the temperature inside the chamber is maintained at around -80℃ for a long time under the action of the cooling medium, providing a stable low-temperature operating environment for the cutting operation unit.

[0054] It should be noted that the above embodiment assumes that the ambient temperature inside the environmental chamber 2 is -80℃. In fact, the temperature can be selected from -10℃ to -80℃. At -80℃, the self-adhesive can cool and set quickly, which can reduce the cooling waiting time and improve the efficiency of the test.

[0055] In some embodiments, see Figure 1 and Figure 2 As shown, a protective door 4 is provided on one side of the environmental chamber 2, and an observation window 401 is provided on the protective door 4. The observation window 401 is equipped with transparent glass so that the cutting situation inside the chamber can be observed in real time from outside the environmental chamber 2 and adjustments can be made in a timely manner.

[0056] The protective door 4 is mounted on the environmental chamber 2 by means of a hinge. A door lock is also provided between the protective door 4 and the environmental chamber 2 to lock the closed protective door 4. Such a door lock can be conventional and is not the inventive point of this application, so it will not be listed here.

[0057] In some embodiments, see Figures 1 to 4 As shown, a support base 5 is provided at the bottom of the environmental chamber 2, and the lower tooling 6 is fixed on the support base 5; a pressure plate 9 is fixed to the end of the actuator rod of the linear actuator 1, and the upper tooling 8 is fixed on the lower surface of the pressure plate 9. This installation method provides strong support for the lower tooling 6 to withstand the impact force of the upper tooling 8 moving downward, and at the same time provides reliable support for the upper tooling 8, so that the cutting blade 7 can move downward synchronously and stably with the upper tooling 8, ensuring the cutting accuracy.

[0058] The process of measuring the shape and height of the self-adhesive sealing strip using the self-adhesive sealing strip measuring and testing device provided in this application is as follows: Open the protective door 4, and the cylinder drives the upper fixture and cutting blade to rise to a certain distance from the lower fixture. Place the sealing strip 10 into the positioning groove 601 of the lower fixture 6, and inject adhesive into the sealing strip. Close the protective door 4, open the solenoid valve on the cooling medium pipeline, and introduce liquid nitrogen into the environmental chamber 2 to rapidly cool and freeze the adhesive. When the temperature sensor 3 detects that the temperature inside the chamber reaches -80℃, maintain this temperature for 3 minutes, and then stop introducing liquid nitrogen. Open the pneumatic valve supplying gas to the cylinder, start the cylinder, and push the upper fixture 8 and cutting blade downward. In the low-temperature freezing environment, the sealing strip 10 and the adhesive layer 11 can be cleanly and neatly cut to obtain a flat measurement profile. Open the protective door 4, and when the temperature inside the chamber is similar to the outside temperature, take out the cut sealing strip 10 and place the sealing strip 10 under a microscope to measure the height and shape of the adhesive layer 11.

[0059] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A testing device for measuring the adhesive properties of sealing strips, characterized in that, include: The environmental chamber (2) is equipped with a cooling medium inlet (202) and a cooling medium outlet (201); as well as The sealing strip cutting fixture includes a linear actuator (1) installed above the environmental chamber (2), a lower fixture (6) located at the bottom of the environmental chamber (2), an upper fixture (8) installed on the actuator rod of the linear actuator (1), and a cutting blade (7) installed on the upper fixture (8); the lower fixture (6) is provided with a positioning groove (601) adapted to the sealing strip (10); The cooling medium supplied through the cooling medium inlet (202) rapidly cools the self-adhesive injected into the sealing strip (10). The linear actuator (1) pushes the upper fixture (8) in the environmental chamber (2) downward to cut off the sealing strip (10) and the cooled self-adhesive layer (11) arranged on the lower fixture (6), thereby obtaining a measurement profile of the self-adhesive layer (11).

2. The sealing strip self-adhesive measuring and testing device as described in claim 1, characterized in that, The lower tooling (6) is also provided with a guide groove (602) for the cutting blade (7) to move downwards and cut.

3. The test device of claim 2, wherein the adhesive is a pressure sensitive adhesive. The upper tooling (8) is provided with a clearance groove (801) to avoid the sealing strip (10). The upper tooling (8) moves downward along the guide groove (602), and the cutting blade (7) is embedded in the upper tooling (8).

4. The sealing strip self-adhesive measuring and testing device as described in claim 3, characterized in that, The upper tooling (8) is provided with a slot (802) for mounting the cutting blade (7), and the cutting edge of the cutting blade (7) is flush with the lower surface of the upper tooling (8); the bottom of the guide groove (602) is flush with the bottom of the positioning groove (601).

5. The sealing strip self-adhesive measuring and testing device as described in claim 1, characterized in that, Two cutting blades (7) are installed at intervals on the upper tooling (8) to cut out the sealing strip segments to be measured.

6. The sealing strip self-adhesive measuring and testing device as described in claim 1, characterized in that, The linear actuator (1) is any one of a cylinder, an electric push rod, or a hydraulic cylinder.

7. The sealing strip self-adhesive measuring and testing device as described in claim 1, characterized in that, The inner wall of the environmental chamber (2) is provided with a heat insulation layer.

8. The sealing strip self-adhesive measuring and testing device as described in claim 1, characterized in that, A temperature sensor (3) is installed inside the environmental chamber (2).

9. The sealing strip self-adhesive measuring and testing device as described in claim 1, characterized in that, A protective door (4) is provided on one side of the environmental chamber (2), and a transparent observation window (401) is provided on the protective door (4).

10. The sealing strip self-adhesive measuring and testing device as described in claim 1, characterized in that, The bottom of the environmental chamber (2) is provided with a support base (5), and the lower tooling (6) is fixed on the support base (5); the end of the actuator rod of the linear actuator (1) is fixed with a pressure plate (9), and the upper tooling (8) is fixed on the lower surface of the pressure plate (9).

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