A device for testing the tightness of a plastic film

Abstract

This application relates to the field of plastic film technology and discloses a plastic film sealing performance testing device, including a lower shell, an upper shell above the lower shell, and a side shell on one side of the lower shell and the upper shell. Cylinders are fixedly installed on the outer walls of the lower shell and the upper shell and the upper end of the side shell, respectively. The telescopic end of each cylinder slides through the inner wall of the corresponding lower shell, upper shell and side shell. A clamping plate is fixedly installed on the telescopic end of each cylinder. The side shell drives the clamping plate through the cylinder to pre-clamp and fix the heat-sealing point of the film. Subsequently, the operator operates the upper and lower shells to clamp both ends of the heat-sealed film to ensure that the heat-sealing point position is consistent in each batch of tests. When the upper shell is raised and lowered to stretch the heat-sealed film to test the sealing performance, the side shell releases the clamping state in time to avoid the test mechanism error caused by the displacement of the heat-sealing point position, thus ensuring the accuracy of the sealing performance test and improving the reliability of the test results.

Description

Technical Field

[0001] This application relates to the field of plastic film technology, specifically to a plastic film sealing performance testing device. Background Technology

[0002] The plastic film sealing performance tester (sealing tester) is a professional device used to test the sealing performance of materials such as plastic film substrates and flexible packaging composite films. It simulates the pressure and environmental changes of packaging materials in actual use. The simulated packaging material consists of two sections of plastic film heat-sealed together. The tensile testing device tests the sealing performance of the heat-sealed section of the packaging.

[0003] Currently, traditional setups typically use upper and lower clamps to hold the ends of the heat-sealed plastic film. A lifting mechanism then checks the seal at the heat-sealed point. This detection usually involves sensors such as tension and displacement sensors. However, when the film is clamped, the position of the heat-sealed point between the upper and lower clamps varies with each clamping operation. This can affect the accuracy of the optical sensor's distance measurement, and consequently, the accuracy of the seal detection. Utility Model Content

[0004] The purpose of this application is to provide a plastic film sealing performance testing device, which solves the problem mentioned in the background art. The traditional setup generally uses an upper clamp and a lower clamp to hold the two ends of the heat-sealed plastic film, and then uses a lifting mechanism to detect the sealing performance of the heat-sealed point of the plastic film. The detection method generally uses sensors such as tension sensors and displacement sensors. However, when the operator clamps the heat-sealed film, the position of the heat-sealed point between the upper and lower clamps is different each time the film is clamped. This may lead to the inaccuracy of the distance measurement detection of the optical sensor, and thus the inaccuracy of the sealing performance detection.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This application provides a plastic film sealing performance testing device, including a lower shell, an upper shell above the lower shell, and a side shell on one side of the lower shell and the upper shell. Cylinders are fixedly installed on the outer walls of the lower shell and the upper shell and the upper end of the side shell, respectively. The telescopic end of each cylinder slides through the inner wall of the corresponding lower shell, upper shell and side shell. A clamping plate is fixedly installed on the telescopic end of each cylinder. Each clamping plate is slidably connected to the inner wall of the corresponding upper shell, lower shell and side shell. A testing mechanism is provided on the outer wall of the upper shell.

[0006] By adopting the above technical solution, the side shell uses a cylinder to drive the clamping plate to pre-clamp and fix the position of the film heat-sealing point. Then, the staff operates the upper and lower shells to clamp both ends of the heat-sealed film to ensure that the position of the heat-sealing point is consistent in each batch of tests. When the upper shell is raised and lowered to stretch the heat-sealed film to test the sealing performance, the side shell releases the clamping state in a timely manner to avoid the test mechanism's test error caused by the displacement of the heat-sealing point position, thus ensuring the accuracy of the sealing performance test and improving the reliability of the test results.

[0007] Optionally, mounting brackets are fixedly installed on the outer walls of the lower shell and the side shell, and a base plate and a support frame are fixedly installed on the ends of the two sets of mounting brackets away from the corresponding lower shell and side shell, respectively.

[0008] By adopting the above technical solution, the base plate and support frame can respectively fix the corresponding mounting frame, and each mounting frame can respectively fix the side shell and the lower shell.

[0009] Optionally, an electric push rod is fixedly installed on the outer wall of the support frame, and the telescopic end of the electric push rod is fixedly installed with the upper shell.

[0010] By adopting the above technical solution, the support frame can fix the electric push rod, while the electric push rod can lift and lower the upper shell.

[0011] Optionally, mounting holes are provided in the inner walls around the base plate.

[0012] By adopting the above technical solution, the mounting holes provided in the base plate allow workers to easily install the base plate onto the testing platform that needs to be installed.

[0013] Optionally, the testing mechanism includes a tension sensor fixedly mounted on the upper end of the upper shell.

[0014] By adopting the above technical solution, the upper shell can fix the tension sensor, while the tension sensor can detect the tension of the upper shell.

[0015] Optionally, an optical displacement sensor is fixedly installed on the outer wall of one side of the upper shell.

[0016] By adopting the above technical solution, the upper shell can fix the optical displacement sensor, while the optical displacement sensor can detect the displacement of the upper shell as it rises and falls.

[0017] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows: The technical solution of this application uses a cylinder to drive a clamping plate to pre-clamp and fix the position of the film heat-sealing point. Then, the operator operates the upper and lower shells to clamp both ends of the heat-sealed film to ensure that the position of the heat-sealing point is consistent for each batch of tests. When the upper shell is raised and lowered to stretch the heat-sealed film to test the sealing performance, the side shell releases the clamping state in a timely manner to avoid test errors caused by the displacement of the heat-sealing point position, thus ensuring the accuracy of the sealing performance test and improving the reliability of the test results. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is an axial view schematic diagram of a plastic film sealing performance testing device according to this application; Figure 2 This application discloses a plastic film sealing performance testing device. Figure 1 Enlarged view of point A in the middle; Figure 3 This is a left-side view of the lower shell of a plastic film sealing performance testing device according to this application; Figure 4 This is a right-side schematic diagram of a plastic film sealing performance testing device according to this application.

[0019] In the diagram: 1. Lower shell; 2. Upper shell; 3. Side shell; 4. Cylinder; 5. Clamping plate; 6. Tension sensor; 7. Optical displacement sensor; 8. Mounting bracket; 9. Support bracket; 10. Electric push rod; 11. Base plate; 12. Mounting hole. Detailed Implementation

[0020] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This application provides a technical solution: a plastic film sealing performance testing device, including a lower shell 1, an upper shell 2 above the lower shell 1, a side shell 3 on one side of the lower shell 1 and the upper shell 2, cylinders 4 fixedly installed on the outer side walls of the lower shell 1 and the upper shell 2 and the upper end of the side shell 3 respectively, the telescopic end of each cylinder 4 slidingly passing through the inner wall of the corresponding lower shell 1, upper shell 2 and side shell 3 respectively, a clamping plate 5 fixedly installed on the telescopic end of each cylinder 4, and each clamping plate 5 slidingly connected to the inner wall of the corresponding upper shell 2, lower shell 1 and side shell 3 respectively, and a testing mechanism is provided on the outer wall of the upper shell 2; In the technical solution of this application, the side shell 3 drives the clamping plate 5 through the cylinder 4 to pre-clamp and fix the position of the film heat sealing point. Then, the staff operates the upper shell 2 and the lower shell 1 to clamp both ends of the heat sealing film to ensure that the position of the heat sealing point is consistent in each batch of testing. When the upper shell 2 is lifted and stretched to test the sealing performance, the side shell 3 releases the clamping state in time to avoid the test mechanism error caused by the displacement of the heat sealing point position, thus ensuring the accuracy of the sealing performance test and improving the reliability of the test results.

[0022] In the technical solution of this application, such as Figure 1 , Figure 2 and Figure 4 As shown, the testing mechanism includes a tension sensor 6 fixedly installed on the upper end of the upper shell 2. The upper shell 2 can fix the tension sensor 6, and the tension sensor 6 can detect the tension of the upper shell 2. An optical displacement sensor 7 is fixedly installed on the outer wall of one side of the upper shell 2. The upper shell 2 can fix the optical displacement sensor 7, and the optical displacement sensor 7 can detect the displacement of the upper shell 2 as it rises and falls.

[0023] In the technical solution of this application, such as Figure 1 As shown, mounting brackets 8 are fixedly installed on the outer walls of the lower shell 1 and the side shell 3, respectively. A base plate 11 and a support frame 9 are fixedly installed on the ends of the two sets of mounting brackets 8 away from the corresponding lower shell 1 and side shell 3, respectively. The base plate 11 and the support frame 9 can fix the corresponding mounting brackets 8, and each mounting bracket 8 can fix the side shell 3 and the lower shell 1, respectively. An electric push rod 10 is fixedly installed on the outer wall of the support frame 9. The telescopic end of the electric push rod 10 is fixedly installed with the upper shell 2. The support frame 9 can fix the electric push rod 10, and the electric push rod 10 can lift the upper shell 2. Mounting holes 12 are opened in the inner wall around the base plate 11. The mounting holes 12 in the base plate 11 can facilitate the staff to install the base plate 11 onto the testing table to be installed.

[0024] In use, the cylinder 4 on the side shell 3 drives the corresponding clamping plate 5 to extend and retract, thereby pre-clamping and fixing the heat-sealing point of the film placed on the side shell 3 to ensure that the heat-sealing point is fixed. Then, the operator operates the cylinder 4 on the lower shell 1 and the upper shell 2 to make the clamping plates 5 of the lower shell 1 and the upper shell 2 firmly clamp the two ends of the heat-sealing film respectively. At this time, the electric push rod 10 on the support frame 9 is activated, and its extension end drives the upper shell 2 to perform lifting and lowering operations. During the lifting and lowering process, the upper shell 2 stretches the heat-sealing film. During this process, the side shell 3 controls the cylinder 4 in a timely manner to release the clamping plate 5 from the heat-sealing point to avoid affecting the stretching. At the same time, the tension sensor 6 at the upper end of the upper shell 2 detects the tension in real time during the stretching process, and the optical displacement sensor 7 on one side of the upper shell 2 detects the displacement of the upper shell 2 during lifting and lowering. By comprehensively analyzing the tension and displacement data, the sealing performance of the heat-sealed section of the plastic film is accurately tested.

Claims

1. A plastic film sealing performance testing device, characterized in that: The device includes a lower shell (1), an upper shell (2) is provided above the lower shell (1), a side shell (3) is provided on one side of the lower shell (1) and the upper shell (2), and cylinders (4) are fixedly installed on the outer walls of the lower shell (1) and the upper shell (2) and the upper end of the side shell (3), respectively. The telescopic end of each cylinder (4) slides through the inner wall of the corresponding lower shell (1), upper shell (2) and side shell (3), and clamping plates (5) are fixedly installed on the telescopic end of each cylinder (4). Each clamping plate (5) is slidably connected to the inner wall of the corresponding upper shell (2), lower shell (1) and side shell (3), respectively. A testing mechanism is provided on the outer wall of the upper shell (2).

2. The plastic film sealing performance testing device according to claim 1, characterized in that, Mounting brackets (8) are fixedly installed on the outer walls of the lower shell (1) and the side shell (3), and a base plate (11) and a support frame (9) are fixedly installed on the ends of the two sets of mounting brackets (8) away from the corresponding lower shell (1) and side shell (3).

3. The plastic film sealing performance testing device according to claim 2, characterized in that, An electric push rod (10) is fixedly installed on the outer wall of the support frame (9), and the telescopic end of the electric push rod (10) is fixedly installed with the upper shell (2).

4. The plastic film sealing performance testing device according to claim 2, characterized in that, Mounting holes (12) are respectively provided in the inner wall around the base plate (11).

5. The plastic film sealing performance testing device according to claim 1, characterized in that, The testing mechanism includes a tension sensor (6) fixedly installed on the upper end of the upper shell (2).

6. The plastic film sealing performance testing device according to claim 5, characterized in that, An optical displacement sensor (7) is fixedly installed on the outer wall of one side of the upper shell (2).

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