Vehicle hot melt adhesive aging test device

Abstract

The utility model discloses a hot melt adhesive aging test device for vehicles, and relates to the technical field of test experiments, the hot melt adhesive aging test device for vehicles comprises a detection box, a first clamp, a second clamp and a first control member, the detection box is provided with a box door, and the first clamp and the second clamp are both located in the detection box. A to-be-detected sample strip is clamped between the first clamp and the second clamp, the second clamp is relatively fixed to the detection box in the length direction of the to-be-detected sample strip, the first control piece is installed on the detection box, the first control piece is connected with the first clamp, and periodic reciprocating stretching acting force in different directions is applied to the to-be-detected sample strip through the at least two clamps. The to-be-tested sample strip is always in an alternating mechanical environment, so that the stress environment is more complex, the aging effect of the hot melt adhesive is better, the aging time of the hot melt adhesive is greatly shortened, and the experiment time is shortened.

Description

Technical Field

[0001] This utility model relates to the field of testing and experimental technology, and more specifically, to an aging test device for automotive hot melt adhesive. Background Technology

[0002] Hot melt adhesive is a type of plastic adhesive that is solid at room temperature. It can quickly bond after being heated and melted. Aging tests on hot melt adhesive are an essential step in the production process.

[0003] Since the solvent temperature of the adhesive is 130℃, it is difficult to effectively simulate the material by simply increasing the temperature to shorten the aging time using the principle of time-temperature equivalence. Furthermore, the degradation of the adhesive is mostly bulk degradation, making it impossible to effectively screen for it.

[0004] Currently, the main method for testing the aging of hot melt adhesives is to place the hot melt adhesive in a high-temperature environment, fix a fully cured sample strip vertically, and connect a counterweight below the sample strip. The constant stress at the temperature is used to shorten the aging time of the adhesive. However, this aging method, which simulates the application scenario, is mainly used in the consumer electronics field. The aging time of hot melt adhesives used in the automotive field is 1000 hours. Therefore, the above method also requires a lot of time, and the constant stress is difficult to evaluate the usage environment of automotive hot melt adhesives.

[0005] In conclusion, how to provide a more efficient hot melt adhesive aging test device is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide an aging test device for automotive hot melt adhesives, which can greatly improve the testing efficiency by applying multi-directional forces to the test sample.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An aging test device for automotive hot melt adhesive includes:

[0009] The testing box is equipped with a door;

[0010] A first clamp and a second clamp are both located inside the testing box. The sample to be tested is held between the first clamp and the second clamp. The second clamp is fixed relative to the testing box along the length direction of the sample to be tested.

[0011] A first control component is installed in the testing box and connected to the first fixture, which controls the first fixture to reciprocate along the length of the test strip.

[0012] Furthermore, this utility model also includes:

[0013] The second control component is installed in the detection box and connected to the second clamp, and controls the second clamp to deform the test strip.

[0014] Furthermore, in this invention, the second control element controls the second clamp to twist along a direction perpendicular to the length of the sample to be measured.

[0015] Furthermore, this utility model also includes:

[0016] A connecting rod, one end of which is connected to the first clamp, and the first control unit controls the connecting rod to reciprocate along the length direction of the test strip.

[0017] Furthermore, this utility model also includes:

[0018] An elastic element is located between the first clamp and the connecting rod.

[0019] Furthermore, in this invention, the elastic element is a spring.

[0020] Furthermore, this utility model also includes:

[0021] The mounting plate is equipped with the second clamp, and the second control unit controls the rotation of the mounting plate.

[0022] Furthermore, in this invention, the second clamp is mounted on the side of the mounting plate away from its axis.

[0023] Furthermore, in this invention, both the first control component and the second control component are motors.

[0024] Furthermore, this utility model also includes:

[0025] A temperature sensor and a humidity sensor are both installed in the detection box.

[0026] The automotive hot melt adhesive aging test device provided by this utility model involves installing both the first and second clamps inside the test chamber. The chamber door is used for replacing the test strip or for repairing and replacing parts of the device. The test strip is a standard-sized strip that has been cut. The second clamp is fixed relative to the test chamber along the length of the test strip. The first control component is installed in the test chamber and connected to the first clamp, controlling the first clamp to reciprocate along the length of the test strip. That is, by fixing the second clamp to one side of the test chamber, one end of the test strip remains fixed relative to the bottom of the test chamber, while the other end of the test strip moves reciprocally along the length of the test strip under the action of the first clamp driven by the first control component. This stretches the test strip along its length with a periodic reciprocating stretching force, keeping the test strip in an alternating mechanical environment. Therefore, the stress environment is more complex, resulting in better aging effect of the hot melt adhesive, greatly reducing the aging time of the hot melt adhesive and shortening the test time. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the device provided by this utility model.

[0029] Figure 1 In the accompanying drawings, the reference numerals include:

[0030] 1. Testing box; 2. First clamp; 3. Second clamp; 4. First control component; 5. Connecting rod; 6. Test strip; 7. Second control component; 8. Temperature sensor; 9. Humidity sensor; 10. Elastic component; 11. Mounting plate. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] The core of this invention is to provide an aging test device for automotive hot melt adhesives, which can greatly improve the testing efficiency by applying multi-directional forces to the test sample.

[0033] Please refer to Figure 1 An aging test device for automotive hot melt adhesive includes a test chamber 1, a first clamp 2, a second clamp 3, and a first control component 4. The test chamber 1 has a door. The first clamp 2 and the second clamp 3 are both located inside the test chamber 1. A sample 6 to be tested is held between the first clamp 2 and the second clamp 3. The second clamp 3 is fixed relative to the test chamber 1 along the length direction of the sample 6 to be tested. The first control component 4 is installed in the test chamber 1 and is connected to the first clamp 2, and controls the first clamp 2 to reciprocate along the length direction of the sample 6 to be tested.

[0034] In use, both the first clamp 2 and the second clamp 3 are installed inside the testing box 1. The box door is used to replace the test strip or to repair and replace parts of the device. The test strip 6 is a standard-sized strip that has been cut. The second clamp 3 is fixed relative to the testing box 1 along the length of the test strip 6. The first control component 4 is installed in the testing box 1 and is connected to the first clamp 2. The first control component 4 controls the first clamp 2 to move back and forth along the length of the test strip 6. That is, by fixing the position of the second clamp 3 relative to one side of the testing box 1, the position of one end of the test strip 6 is kept fixed relative to the bottom of the testing box 1. The other end of the test strip 6 moves back and forth along the length of the test strip 6 under the action of the first clamp 2 driven by the first control component 4. This stretches the test strip 6 along its length and is a periodic reciprocating stretching force. The test strip 6 is always in an alternating mechanical environment, so the stress environment is more complex. Therefore, the aging effect of the hot melt adhesive is better, which greatly reduces the aging time of the hot melt adhesive and shortens the test time.

[0035] It should be noted that in this embodiment of the present invention, aging at 105°C for 5 days using the above-mentioned device is equivalent to aging at 105°C for 1200 hours, aging at 90°C / 90%RH for 4 days is equivalent to aging at 85°C / 85%RH for 1500 hours, and aging at 90°C / 90%RH for 3 days is equivalent to aging at 60°C / 90%RH for 1000 hours. It can be seen that the aging time is significantly increased.

[0036] Optionally, in some embodiments, a sealing gasket is provided at the contact position between the door and the testing box 1 to improve the internal environment of the testing box 1.

[0037] Optionally, in some embodiments, both the first clamp 2 and the second clamp 3 include two clamping plates, which are used to fix the hot melt adhesive test strip 6.

[0038] Optionally, in some embodiments, the first clamp 2 and the second clamp 3 both include two clamping plates whose spacing is controlled by threads. Specifically, they also include a screw with two sections of threads in opposite directions of rotation. The two clamping plates are respectively engaged with the two sections of threads. When the screw rotates, the spacing between the two clamping plates can be adjusted. Thread locking can improve the fixing effect on the hot melt adhesive test strip 6.

[0039] Optionally, in the above embodiments, the two clamping plates of the first clamp 2 and the second clamp 3 are provided with anti-slip textures on their adjacent surfaces, such as anti-slip protrusions or X-shaped textures.

[0040] Please refer to Figure 1 In some embodiments, a second control element 7 is also included. The second control element 7 is installed in the test box 1 and connected to the second clamp 3. The second control element 7 controls the second clamp 3 to cause the test sample 6 to deform. That is, the second control element 7 controls the movement of the second clamp 3, so that the second clamp 3 drives the test sample 6 to deform, increasing the direction and angle of the deformation of the test sample 6, improving the aging efficiency of the test sample 6, and simulating the environment of hot melt adhesive when the vehicle is in use, so as to obtain aging data more accurately.

[0041] Optionally, in some embodiments, the second control member 7 can control the rotation of the second clamp 3, that is, by twisting the test strip 6, it is made to rotate, so that the test strip 6 is subjected to shear force.

[0042] In other embodiments, the second control element 7 can control the second clamp 3 to move laterally, that is, to move laterally along the bottom of the detection box 1.

[0043] Optionally, in some embodiments, the second control member 7 controls the second clamp 3 to twist along a direction perpendicular to the length of the test strip 6. That is, the second control member 7 can control the second clamp 3 to rotate, thereby causing the test strip 6 to twist, increasing the detection direction of the test strip 6 and increasing the aging efficiency.

[0044] Please refer to Figure 1 In some embodiments, a connecting rod 5 is also included. One end of the connecting rod 5 is connected to the first clamp 2. The first control member 4 controls the connecting rod 5 to move back and forth along the length direction of the test strip 6. That is, the connecting rod 5 is slidably installed on the test box 1, and the test strip 6 can be stretched by sliding the connecting rod 5 up and down through the first control member 4.

[0045] Optionally, in some embodiments, a sliding seal is used between the connecting rod 5 and the detection box 1, which helps to seal the internal space of the detection box 1 and ensure the control of temperature and humidity.

[0046] Optionally, in some embodiments, the first control element 4 may be an electric cylinder. Specifically, the electric cylinder is fixed to the detection box 1 and is arranged along the length of the connecting rod 5. The end of the connecting rod 5 extending out of the detection box 1 is connected to the extended end of the electric cylinder. Therefore, when the electric cylinder extends or retracts, it achieves the purpose of controlling the up and down movement of the connecting rod 5.

[0047] Optionally, in some embodiments, the first control element 4 may be a cylinder. Specifically, the cylinder is fixed to the detection box 1 and is arranged along the length of the connecting rod 5. The end of the connecting rod 5 extending out of the detection box 1 is connected to the extended end of the cylinder. Therefore, when the cylinder extends or retracts, it achieves the purpose of controlling the up and down movement of the connecting rod 5.

[0048] Optionally, in some embodiments, the first control element 4 may be a hydraulic cylinder. Specifically, the hydraulic cylinder is fixed to the detection box 1 and is arranged along the length of the connecting rod 5. The end of the connecting rod 5 extending out of the detection box 1 is connected to the extended end of the hydraulic cylinder. Therefore, when the hydraulic cylinder extends or retracts, it achieves the purpose of controlling the up and down movement of the connecting rod 5.

[0049] Please continue to refer to this. Figure 1 In some embodiments, an elastic element 10 is also included. The elastic element 10 is located between the first clamp 2 and the connecting rod 5. That is, the first clamp 2 and the connecting rod 5 are connected by the elastic element 10, which can prevent the test sample 6 from breaking after being subjected to a large tensile force and increase the fault tolerance of the device during operation.

[0050] Optionally, in some embodiments, the elastic element 10 is a spring, and the spring may have different elastic coefficients.

[0051] Optionally, in the above embodiments, the spring is detachably installed between the first clamp 2 and the connecting rod 5. Specifically, mounting rings are provided on the ends of both the first clamp 2 and the connecting rod 5. The spring can be installed by hanging the hook on the mounting ring, which is beneficial for changing different springs for different test specimens 6.

[0052] Alternatively, in other embodiments, the elastic element 10 may also be made of rubber, such as rubber bands, rubber strips, etc.

[0053] Alternatively, in other embodiments, the elastic element 10 may also be made of plastic, such as SBS, SEBS, TPV, TPU, etc.

[0054] Please continue to refer to this. Figure 1 In some embodiments, the device also includes a mounting plate 11, a second clamp 3 mounted on the mounting plate 11, and a second control element 7 controlling the rotation of the mounting plate 11. That is, by setting the mounting plate 11 inside the detection box 1, it is convenient to install the second clamp 3, and at the same time, the second control element 7 is used to control the rotation of the mounting plate 11.

[0055] Optionally, in some embodiments, the bottom of the mounting plate 11 is provided with a rotating shaft, which is rotatably mounted on the detection box 1 and is sealed by rotation. The second control component 7 only needs to drive the rotating shaft to rotate.

[0056] Optionally, in some embodiments, the second clamp 3 is installed on the side of the mounting plate 11 away from its axis. That is, the second clamp 3 can be installed eccentrically. Eccentric installation can cause the second clamp 3 to rotate and displace the test sample 6, thereby further improving the aging efficiency of the test sample 6.

[0057] Optionally, in some embodiments, the first control element 4 is a motor.

[0058] Specifically, the first control component 4 is a motor and is installed on the detection box 1. The end of the connecting rod 5 extending out of the detection box 1 is equipped with a rack. The output end of the first control component 4 is equipped with a gear that meshes with the rack. The up and down movement of the connecting rod 5 is achieved through the meshing of the gear and rack.

[0059] Optionally, in some other embodiments, a turntable is installed on the motor output end of the first control member 4, and a connecting rod is hinged at the eccentric position of the turntable. The other end of the connecting rod is hinged to the connecting rod 5. Therefore, when the motor of the first control member 4 rotates, the connecting rod 5 can move up and down.

[0060] Optionally, in some embodiments, the second control element 7 is a motor.

[0061] Specifically, the second control component 7 is a motor and is installed on the detection box 1. Therefore, the motor output end of the second control component 7 is connected to the mounting plate 11, so that the mounting plate 11 can be rotated.

[0062] Please continue to refer to this. Figure 1 In some embodiments, temperature sensor 8 and humidity sensor 9 are both installed in the detection box 1 to detect the temperature and humidity inside the detection box 1.

[0063] Optionally, in some embodiments, the testing chamber 1 is further provided with a heating tube and a controller. The controller automatically controls the operation of the heating tube based on the temperature data received, thereby achieving the purpose of real-time automatic control of the internal temperature of the testing chamber 1.

[0064] In other words, the key point of this utility model embodiment is that: the second clamp 3 is relatively fixed to one side of the test box 1, so the position of one end of the test strip 6 is fixed relative to the bottom of the test box 1, while the other end of the test strip 6 moves back and forth along the length direction of the test strip 6 under the action of the first clamp 2 driven by the first control component 4, that is, the test strip 6 is stretched in the length direction, and it is a periodic reciprocating stretching force. The test strip 6 is always in an alternating mechanical environment, so the stress environment is more complex, so the aging effect of the hot melt adhesive is better, which greatly reduces the aging time of the hot melt adhesive and shortens the test time.

[0065] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0066] The above provides a detailed description of the automotive hot melt adhesive aging test device provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An aging test device for automotive hot melt adhesive, characterized in that, include: The testing box (1) is equipped with a door; The first clamp (2) and the second clamp (3) are both located inside the test box (1). The test strip (6) is held between the first clamp (2) and the second clamp (3). The second clamp (3) is fixed relative to the test box (1) along the length direction of the test strip (6). The first control component (4) is installed in the detection box (1). The first control component (4) is connected to the first clamp (2) and controls the first clamp (2) to move back and forth along the length direction of the test strip (6).

2. The automotive hot melt adhesive aging test device according to claim 1, characterized in that, Also includes: The second control element (7) is installed in the detection box (1), and is connected to the second clamp (3) to control the second clamp (3) to cause the test strip (6) to deform.

3. The automotive hot melt adhesive aging test device according to claim 2, characterized in that, The second control element (7) controls the second clamp (3) to twist along the length direction perpendicular to the test strip (6).

4. The automotive hot melt adhesive aging test device according to claim 1, characterized in that, Also includes: A connecting rod (5) is connected at one end to the first clamp (2), and the first control element (4) controls the connecting rod (5) to reciprocate along the length direction of the test strip (6).

5. The automotive hot melt adhesive aging test device according to claim 4, characterized in that, Also includes: An elastic element (10) is located between the first clamp (2) and the connecting rod (5).

6. The automotive hot melt adhesive aging test device according to claim 5, characterized in that, The elastic element (10) is a spring.

7. The automotive hot melt adhesive aging test device according to claim 2, characterized in that, Also includes: Mounting disc (11), second clamp (3) is mounted on mounting disc (11), and second control element (7) controls the rotation of mounting disc (11).

8. The automotive hot melt adhesive aging test device according to claim 7, characterized in that, The second clamp (3) is mounted on the side of the mounting plate (11) away from its axis.

9. An automotive hot melt adhesive aging test device according to any one of claims 2, 3, 7, or 8, characterized in that, Both the first control unit (4) and the second control unit (7) are motors.

10. The automotive hot melt adhesive aging test device according to claim 9, characterized in that, Also includes: Temperature sensor (8) and humidity sensor (9) are installed in the detection box (1).

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