A packaging film tear strength detection machine

Abstract

This application discloses a packaging film tear strength testing machine, belonging to the field of packaging film strength testing technology. It mainly includes a machine body, a drive assembly mounted on the machine body, the drive assembly including an electric push rod mounted on the upper end of the machine body, the output end of the electric push rod penetrating the machine body and having a connecting plate installed thereon, a tension / compression sensor fixedly mounted on the lower end of the connecting plate, and a clamping assembly mounted on the machine body, the clamping assembly including two first clamping plates, and a placement platform mounted on the front end of the machine body. This packaging film tear strength testing machine, by setting up the clamping assembly, only requires the film to be laid flat on the placement platform, and fixation is completed through simple snap-fit ​​and tightening actions. The step-by-step operation reduces the difficulty of hand coordination, reduces film deformation caused by hand tremors or uncoordinated operation, improves clamping efficiency and consistency, and enhances the accuracy of subsequent strength testing.

Description

Technical Field

[0001] This application relates to the field of packaging film strength testing technology, specifically a packaging film tear strength testing machine. Background Technology

[0002] Packaging films are typically made of plastic materials such as polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC), and some may also contain additives such as plasticizers and antioxidants. They are mainly used for packaging various products, serving functions such as moisture protection, dust protection, fixation, protection, and extending shelf life. Packaging films are usually tested for tear strength to reflect their tear resistance. If the strength is insufficient, they are easily damaged during transportation, storage, or use, leading to product protection failure. Testing ensures that the packaging film can effectively withstand mechanical impacts in actual applications, guaranteeing the reliability of the packaging function.

[0003] For example, the patent with publication number CN221224405U discloses a thin film strength testing device, including: an equipment box, a testing plate, a tensile tester and a moving plate. It solves the problem that existing testing devices can only perform a single tensile strength test on a thin film sample, while thin film testing requires multiple tests and average values, which leads to reduced thin film testing efficiency when using existing testing mechanisms, and improves the thin film testing efficiency.

[0004] In the aforementioned patent, the film sample is placed in the middle of the clamping plate, and then the clamping shaft is rotated. This rotation causes the clamping plate to move laterally, clamping the film and locking the top of the sample. The bottom of the sample is then placed on the rear surfaces of the three locking plates, and the locking shaft is rotated to lock the bottom of the sample. However, when clamping the film sample, due to its soft material and weak self-support, irregular bending and wrinkling may occur due to gravity or slight airflow when the top is placed in the middle of the clamping plate. Local stacking may also occur. At this point, the operator needs to use one hand to smooth out the wrinkles and keep the film flat, while using the other hand to rotate the clamping shaft to lock it. This process is not only prone to causing further deformation due to hand tremors, but also may lead to misalignment of the clamping position due to lack of coordination between the hands. The operation is difficult and can easily affect the accuracy of subsequent testing.

[0005] Therefore, it is necessary to provide a packaging film tear strength testing machine to solve the above problems.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0007] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a packaging film tear strength testing machine, which solves the problem that film samples are prone to irregular bending and wrinkling during clamping due to their soft material and weak self-support, which makes operation difficult and easily affects the accuracy of subsequent testing.

[0008] The technical solution adopted by this application to solve its technical problem is: a packaging film tear strength testing machine, including a machine body;

[0009] A drive assembly is mounted on the machine body. The drive assembly includes an electric push rod mounted on the upper end of the machine body. The output end of the electric push rod passes through the machine body and is mounted on a connecting plate. A tension / compression sensor is fixedly mounted on the lower end of the connecting plate.

[0010] A clamping assembly is installed on the machine body. The clamping assembly includes two first clamping plates. A placement platform is installed at the front end of the machine body. Limiting grooves are opened on both sides of the placement platform. The two first clamping plates are snapped into the corresponding limiting grooves. A connecting seat is installed on one side of each of the two first clamping plates. A second clamping plate is installed at the front end of the connecting seat. A U-shaped frame is installed on the other side of the first clamping plates. A limiting bolt is installed at the front end of the U-shaped frame. A pressure block is installed at the rear end of the limiting bolt.

[0011] The mounting components are installed on the body.

[0012] Furthermore, a locking block is installed on the outer wall of the front end of the first clamping plate, and a locking groove is provided at the rear end of the second clamping plate, with the locking block being snapped into the groove.

[0013] Furthermore, the mounting assembly includes an upper mounting plate mounted on the lower end of the tension / compression sensor. An upper positioning plate is provided on one side of the upper mounting plate. A first mounting groove is provided on the adjacent side of the upper mounting plate and the upper positioning plate. The upper mounting plate and the upper positioning plate are fixedly connected by bolts. When the upper mounting plate and the upper positioning plate are closed, a clamping channel can be formed between the upper mounting plate and the upper positioning plate.

[0014] Furthermore, the mounting assembly also includes a base mounted on the front end of the machine body. A lower mounting plate is mounted on the upper end of the base. A lower positioning plate is provided on one side of the lower mounting plate. A second mounting groove is provided on the side of the lower mounting plate and the lower positioning plate that are close to each other. The lower mounting plate and the lower positioning plate are fixedly connected by bolts. When the lower mounting plate and the lower positioning plate are closed, a clamping channel can be formed between the lower mounting plate and the lower positioning plate. Anti-slip textures are provided on the upper mounting plate and the upper positioning plate, as well as the lower mounting plate and the lower positioning plate.

[0015] Furthermore, guide rods are installed on both sides of the interior of the machine body, and the connecting plate is slidably connected to the guide rods.

[0016] Furthermore, both the clamping surfaces of the first and second clamping plates are provided with silicone pads, and the silicone pads are provided with micro-convex textures.

[0017] Furthermore, a support frame is fixedly installed on the outer wall of one side of the machine body, and a PLC control module is fixedly installed on the upper end of the support frame.

[0018] The beneficial effects of this application are as follows: The packaging film tear strength testing machine provided by this application only requires the film to be laid flat on the placement platform by setting up the clamping component. The film can be fixed by simple snapping and tightening actions. The step-by-step operation reduces the difficulty of coordinating both hands, reduces film deformation caused by hand tremors or uncoordinated operation, improves clamping efficiency and consistency, and improves the accuracy of subsequent strength testing.

[0019] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is an overall schematic diagram of a packaging film tear strength testing machine according to this application;

[0022] Figure 2 This is a bottom view schematic diagram of a packaging film tear strength testing machine according to this application;

[0023] Figure 3 This is a top view schematic diagram of a packaging film tear strength testing machine according to this application;

[0024] Figure 4 This is a schematic diagram of the clamping assembly of a packaging film tear strength testing machine according to this application;

[0025] Figure 5 This is a schematic diagram of the clamping assembly of a packaging film tear strength testing machine according to this application;

[0026] Figure 6 for Figure 1 Enlarged view of point A in the middle;

[0027] Figure 7 for Figure 2 Enlarged view of point B in the middle.

[0028] The following are the labeling elements in the figure:

[0029] 1. Machine body; 2. Drive assembly; 21. Electric push rod; 22. Guide rod; 3. Connecting plate; 4. Tension / compression sensor; 5. Mounting assembly; 51. Upper mounting plate; 52. Anti-slip texture; 53. Upper positioning plate; 54. First mounting slot; 55. Base; 56. Lower mounting plate; 57. Lower positioning plate; 58. Second mounting slot; 6. Clamping assembly; 61. Placement platform; 62. Limiting slot; 63. First clamping plate; 64. Connecting seat; 65. Second clamping plate; 66. U-shaped frame; 67. Limiting bolt; 68. Pressure block; 69. Locking block; 610. Locking groove; 7. Support frame; 8. PLC control module. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

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

[0032] like Figure 1 As shown, this application provides a packaging film tear strength testing machine, including a machine body 1. Support legs (not marked in the figure) are fixedly installed at the four corners of the lower end of the machine body 1. The machine body 1 serves as the basic frame of the entire equipment. The four support legs are made of high-strength alloy material, which can provide stable support for the equipment and effectively reduce the error caused by vibration during the testing process.

[0033] like Figure 1-2 As shown, a drive assembly 2 is provided at the upper end of the machine body 1. The drive assembly 2 is the core of realizing the stretching action. The drive assembly 2 includes an electric push rod 21 fixedly installed at the upper end of the machine body 1. The electric push rod 21 is driven by a high-precision servo motor, which can accurately control the extension speed and stroke of the output end. Its output end passes through the machine body 1 and is rigidly connected to the connecting plate 3, which can stably transmit the driving force to the detection structure below.

[0034] The tension / compression sensor 4 fixed at the lower end of the connecting plate 3 can capture the force changes of the packaging film during the tearing process in real time and transmit the data synchronously to the control system. At the same time, guide rods 22 are fixedly installed on both sides inside the machine body 1. The guide rods 22 are slidably connected to the connecting plate 3. The surface of the guide rods 22 is precision ground and, together with the wear-resistant sliding sleeve on the connecting plate 3, can limit the movement trajectory of the connecting plate 3 and ensure the stability of the stretching process.

[0035] like Figure 6-7 As shown, the body 1 is equipped with an installation component 5. The installation component 5 is divided into upper and lower parts. The installation component 5 includes an upper mounting plate 51 fixedly installed at the lower end of the tension and compression sensor 4. An upper positioning plate 53 is provided on one side of the upper mounting plate 51. A first mounting groove 54 is opened on the side of the upper mounting plate 51 and the upper positioning plate 53 that are close to each other. Correspondingly, a base 55 is fixedly installed inside the body 1. A lower mounting plate 56 is fixedly installed on the upper end of the base 55 by bolts. The base 55 is connected to the inside of the body 1 by multiple sets of bolts to form a stable lower support structure.

[0036] The lower mounting plate 56 and the lower positioning plate 57 are matched in the same way as the upper structure. The size of the second mounting groove 58 matches the first mounting groove 54 to ensure that the force direction of the packaging film is perpendicular to the clamping surface during the stretching process, thereby reducing the detection error caused by the clamping angle deviation. The upper mounting plate 51 and the upper positioning plate 53, as well as the lower mounting plate 56 and the lower positioning plate 57, are all provided with anti-slip textures 52.

[0037] like Figure 3-5 As shown, the machine body 1 is equipped with a clamping assembly 6, which includes two first clamping plates 63. A placement platform 61 is fixedly installed at the front end of the machine body 1. The placement platform 61 is made of aluminum alloy with an anodized surface, which is flat, smooth, and not easy to get dusty, providing a reference surface for the flat laying of the packaging film. The limiting grooves 62 on both sides of the placement platform 61 adopt a T-slot design, and the two first clamping plates 63 can be snapped into the limiting grooves 62.

[0038] Each of the two first clamping plates 63 has a connecting seat 64 fixedly installed on one side by bolts. A second clamping plate 65 is rotatably installed on the front end of the connecting seat 64. A U-shaped frame 66 is rotatably installed on the other side of the first clamping plate 63. The U-shaped frame 66 is fitted onto the second clamping plate 65. A limit bolt 67 is threadedly installed on the front end of the U-shaped frame 66. A pressure block 68 is fixedly installed on the rear end of the limit bolt 67. The pressure block 68 is tightly fitted with the outer wall of the second clamping plate 65. Rotating the second clamping plate 65 closer to the first clamping plate 63 makes the first clamping plate 63 and the second clamping plate 65 fit together. A locking block 69 is fixedly installed on the outer wall of the front end of the first clamping plate 63. A locking groove 610 is provided at the rear end of the second clamping plate 65. The locking block 69 is locked and installed inside the locking groove 610.

[0039] Both the first clamping plate 63 and the second clamping plate 65 have silicone pads (not shown in the figure) attached to their clamping surfaces. The micro-textured surface of the silicone pads can improve the clamping force without damaging the packaging film. When it is necessary to clamp the packaging film, first lay the packaging film flat on the placement platform 61, adjust the position of the first clamping plate 63 to align it with both sides of the packaging film, open the second clamping plate 65 and place the edge of the film between them, close the second clamping plate 65, and the locking block 69 on the first clamping plate 63 will lock into the locking groove 610 of the second clamping plate 65 to achieve initial positioning.

[0040] Then rotate the U-shaped frame 66 to fit it onto the second clamping plate 65, tighten the limiting bolt 67 to drive the pressure block 68 to squeeze the outer wall of the second clamping plate 65 to further enhance the clamping force and ensure that the packaging film is flat and wrinkle-free before stretching.

[0041] After initial fixation by clamping assembly 6, the first clamping plate 63 and the second clamping plate 65 holding the film are respectively installed into the clamping channels of the upper and lower mounting assemblies 5. After tightening with bolts, the equipment is started, and the drive assembly 2 can drive the upper mounting plate 51 to move upward at a uniform speed. The tension and pressure sensor 4 monitors the force value of the packaging film in real time until the film is torn. The equipment automatically records the maximum tear force value. The whole detection process is efficient, accurate and easy to operate.

[0042] like Figure 1 As shown, a support frame 7 is fixedly installed on one side of the outer wall of the machine body 1. The support frame 7 is made of stainless steel, which has good rust resistance. A PLC control module 8 is installed at the upper end of the support frame 7. The PLC control module 8 is equipped with a high-definition touch screen display. Operators can set parameters such as tensile speed and detection range through the interface, and view the force curve and detection results in real time. The equipment also has data storage and export functions, which can automatically record information such as the time of each test and the peak tear strength, facilitating subsequent data analysis and quality traceability.

[0043] Working principle: First, the packaging film is clamped and fixed. The operator lays the packaging film flat on the placement platform 61, utilizing the flat and smooth characteristics of the placement platform 61 to ensure the film is laid flat. Next, the position of the first clamping plate 63 in the limiting grooves 62 on both sides of the placement platform 61 is adjusted so that it aligns with the two sides of the packaging film. The second clamping plate 65 is opened, and the edge of the film is placed between the first clamping plate 63 and the second clamping plate 65. Then, the second clamping plate 65 is rotated so that it is close to the first clamping plate 63 and fits against it. At this time, the locking block 69 on the first clamping plate 63 will engage in the locking groove 610 of the second clamping plate 65 to complete the initial positioning.

[0044] Then, rotate the U-shaped frame 66 onto the second clamping plate 65, tighten the limiting bolt 67, and drive the pressure block 68 to squeeze the outer wall of the second clamping plate 65 to further enhance the clamping force. At the same time, the silicone pads on the clamping surfaces of the first clamping plate 63 and the second clamping plate 65, with their micro-convex texture, ensure a stable clamping without damaging the film, so that the packaging film is flat and wrinkle-free before stretching.

[0045] After clamping is completed, the first clamping plate 63 and the second clamping plate 65 holding the packaging film are respectively installed into the upper and lower parts of the mounting assembly 5. The upper part is fixed by the first mounting groove 54 of the upper mounting plate 51 and the upper positioning plate 53, and the lower part is fixed by the second mounting groove 58 of the lower mounting plate 56 and the lower positioning plate 57, ensuring that the force direction of the packaging film is perpendicular to the clamping surface, reducing the error caused by the clamping angle deviation. At the same time, the stable connection between the base 55 and the body 1 provides solid support for the lower structure.

[0046] The equipment is then started, and drive assembly 2 begins operation. Driven by a high-precision servo motor, the electric push rod 21 precisely controls the extension and retraction of its output end, transmitting the driving force to the tension / compression sensor 4 via the connecting plate 3. During this process, the sliding fit between the guide rod 22 and the connecting plate 3 restricts the movement trajectory of the connecting plate 3, ensuring stability during the stretching process. As the upper mounting plate 51 moves upward, the tension / compression sensor 4 captures the force changes during the tearing process of the packaging film in real time and synchronously transmits the data to the PLC control module 8.

[0047] As the electric push rod 21 continues to drive the upper mounting plate 51 upward, the packaging film experiences an increasing upward pulling force until it is torn. During this process, the tension and compression sensor 4 records the maximum tear force value, while the PLC control module 8 displays the force curve and detection results on a high-definition touch screen. At the same time, it automatically stores information such as detection time and peak value, facilitating subsequent data analysis and quality traceability. The entire process is efficient and accurate.

[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A packaging film tear strength detection machine characterized by: include Body (1); A drive assembly (2) is installed on the body (1). The drive assembly (2) includes an electric push rod (21) installed on the upper end of the body (1). The output end of the electric push rod (21) passes through the body (1) and is connected to a connecting plate (3). A tension and compression sensor (4) is fixedly installed at the lower end of the connecting plate (3). A clamping assembly (6) is installed on the body (1). The clamping assembly (6) includes two first clamping plates (63). A placement platform (61) is installed at the front end of the body (1). Limiting grooves (62) are opened on both sides of the placement platform (61). The two first clamping plates (63) are snapped into the corresponding limiting grooves (62). A connecting seat (64) is installed on one side of each of the two first clamping plates (63). A second clamping plate (65) is installed at the front end of the connecting seat (64). A U-shaped frame (66) is installed on the other side of the first clamping plate (63). A limiting bolt (67) is installed at the front end of the U-shaped frame (66). A pressure block (68) is installed at the rear end of the limiting bolt (67). Mounting component (5) is mounted on the body (1).

2. The packaging film tear strength testing machine according to claim 1, characterized in that: The first clamping plate (63) has a locking block (69) installed on the outer wall of its front end, and the second clamping plate (65) has a locking groove (610) at its rear end, and the locking block (69) is locked and installed inside the locking groove (610).

3. The packaging film tear strength testing machine according to claim 1, characterized in that: The mounting assembly (5) includes an upper mounting plate (51) mounted on the lower end of the tension / compression sensor (4). An upper positioning plate (53) is provided on one side of the upper mounting plate (51). A first mounting groove (54) is provided on the adjacent side of the upper mounting plate (51) and the upper positioning plate (53). The upper mounting plate (51) and the upper positioning plate (53) are fixedly connected by bolts. When the upper mounting plate (51) and the upper positioning plate (53) are closed, a clamping channel can be formed between the upper mounting plate (51) and the upper positioning plate (53).

4. The packaging film tear strength testing machine according to claim 3, characterized in that: The mounting assembly (5) also includes a base (55) mounted on the front end of the body (1). A lower mounting plate (56) is mounted on the upper end of the base (55). A lower positioning plate (57) is provided on one side of the lower mounting plate (56). A second mounting groove (58) is provided on the side of the lower mounting plate (56) and the lower positioning plate (57) that are close to each other. The lower mounting plate (56) and the lower positioning plate (57) are fixedly connected by bolts. When the lower mounting plate (56) and the lower positioning plate (57) are closed, a clamping channel can be formed between the lower mounting plate (56) and the lower positioning plate (57). Anti-slip textures (52) are provided on the upper mounting plate (51) and the upper positioning plate (53) as well as on the lower mounting plate (56) and the lower positioning plate (57).

5. A packaging film tear strength testing machine according to claim 1, characterized in that: Guide rods (22) are installed on both sides inside the body (1), and the connecting plate (3) is slidably connected to the guide rods (22).

6. A packaging film tear strength testing machine according to claim 1, characterized in that: The clamping surfaces of the first clamping plate (63) and the second clamping plate (65) are provided with silicone pads, and the silicone pads are provided with micro-convex textures.

7. A packaging film tear strength testing machine according to claim 6, characterized in that: A support frame (7) is fixedly installed on the outer wall of one side of the machine body (1), and a PLC control module (8) is fixedly installed on the upper end of the support frame (7).

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