Preservative film toughness detection device

Abstract

The utility model relates to the technical field of detection devices, in particular to a preservative film toughness detection device which comprises a platform, a motor is mounted on the inner wall of one side of the bottom of the platform, and one end of an output shaft of the motor is connected with a two-way screw through a coupler. The detection mechanism is arranged on the outer wall of the platform; the detection mechanism comprises sliding frames installed on the outer walls of the two sides of the two-way screw, the sliding frames are connected to the outer walls of the two sides of the two-way screw through threads, sliding grooves are formed in the outer walls of the two sides of the top ends of the sliding frames, and sliding rods are slidably connected to the inner walls of the sliding grooves. When the preservative film is broken, the numerical value of tension is recorded, the two ends of the preservative film are clamped and limited by the first sawtooth plate and the second sawtooth plate, the operation is convenient and stable through connection and limiting of the hooks, the two ends of the preservative film move synchronously, test errors caused by uneven stress can be reduced, and the detection efficiency of the preservative film toughness detection device is improved.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, specifically a device for testing the toughness of plastic wrap. Background Technology

[0002] When making cling film, its toughness needs to be tested. During the stretching process, the cling film is prone to slipping, which can cause some deviation in the test data. This may affect the application range of the cling film and thus its sales volume.

[0003] A search of Chinese patent CN214277709U reveals a tensile testing device for testing the toughness of plastic wrap. The device includes a threaded rod and protrusions. The movement of the threaded rod causes the protrusions to move synchronously, making the contact surface of the film uneven. This prevents the film from being pulled during tensile testing, thus avoiding discrepancies between the tensile test results and actual conditions, resulting in some error. The device also includes an irradiation head, an upper gear, and a lower gear. The rotation of the upper gear causes the lower gear to rotate synchronously, and the rotation of the lower gear causes the irradiation head to swing left and right, thus irradiating different positions and allowing for direct observation of the film's cracking state when stretched to its maximum extent.

[0004] Based on the above search and existing technology, it was found that the above patent has certain defects. The method of fixing the plastic wrap is too simple. Manually rotating the threaded rod to tighten the plastic wrap may result in uneven clamping force. Different operators may apply different pressures, which affects the repeatability of the test. Furthermore, moving only one end of the plastic wrap while fixing the other end can easily cause stress to concentrate near the fixed end, which may cause the plastic wrap to break or deform prematurely in that area, reducing the detection efficiency of the plastic wrap toughness testing device. Utility Model Content

[0005] The purpose of this invention is to provide a device for testing the toughness of plastic wrap, so as to solve the problems mentioned in the background art.

[0006] The technical solution of this utility model is: a plastic wrap toughness testing device, including a platform, a motor installed on the inner wall of one side of the bottom of the platform, and a bidirectional screw connected to one end of the output shaft of the motor through a coupling; and also includes:

[0007] The testing facility is located on the outer wall of the platform;

[0008] The testing mechanism includes sliding frames installed on the outer walls of both sides of a bidirectional screw. The sliding frames are respectively threaded to the outer walls of both sides of the bidirectional screw. Slide grooves are formed on the outer walls of the top of the sliding frames on both sides. Slide rods are slidably connected to the inner walls of the slide grooves. A support plate is fixedly connected to the outer wall of the top of the slide rod. Telescopic rods are fixedly connected to the outer walls of both sides of the support plate. A second serrated plate is fixedly connected to the outer wall of the bottom end of the support plate. A buffer pad is fixedly connected to the outer wall of the top of the sliding frame. A first serrated plate is fixedly connected to the outer wall of the top of the buffer pad. A tensile testing machine is installed on the outer wall of the sliding frame. A damping shaft is rotatably provided on one side of the outer wall of the support plate. A hook is fixedly connected to the outer wall of the damping shaft. A locking block is fixedly connected to one side of the top of the sliding frame.

[0009] Preferably, a limiting groove is provided on one side of the outer wall of the top of the hook, and the limiting groove is adapted to the size of the locking block.

[0010] Preferably, the outer walls of the first and second sawtooth plates are provided with anti-slip teeth, and the dimensions of the first and second sawtooth plates are adapted to each other.

[0011] Preferably, the sliding frame is slidably connected to the inner wall of the platform, and the first serrated plate and the second serrated plate are adapted to the size of the cling film body.

[0012] Preferably, a plurality of irradiation heads are installed on the bottom outer wall of the telescopic rod, the height of the irradiation heads being adapted to the height of the sliding frame, and the second serrated plate being located directly above the first serrated plate.

[0013] This utility model provides an improved plastic wrap toughness testing device, which has the following improvements and advantages compared with the prior art:

[0014] Firstly, this utility model is equipped with a platform, a bidirectional screw, a sliding frame, a hook, a first serrated plate, and a second serrated plate. The first and second serrated plates together limit and fix the plastic wrap, compressing the buffer pad. Then, the damping shaft is pushed, causing the hook to rotate and connect with the locking block at the top of the sliding frame through the limiting groove, preventing the first and second serrated plates from loosening. The motor is started, and the bidirectional screw rotates, thereby causing the two sliding frames to separate and the plastic wrap to be stretched. This ensures that the plastic wrap is subjected to uniform tension during the stretching process, avoiding stress concentration. The tension is detected by a tension tester between the sliding frames. When the plastic wrap breaks, the tension value is recorded. The two ends of the plastic wrap are clamped and limited by the first and second serrated plates. The hook connection makes the limiting operation convenient and stable, and the two ends of the plastic wrap move synchronously, which can reduce the test error caused by uneven force and improve the detection efficiency of the plastic wrap toughness testing device.

[0015] Secondly, this utility model is equipped with a support plate and a telescopic rod. The support plates on the two sliding frames are connected by the telescopic rod, which makes it easy to press the telescopic rod so that the two support plates slide down at the same time to fix and limit the two ends of the plastic wrap. The operation is convenient and quick, which improves the practicality of the plastic wrap toughness testing device. Attached Figure Description

[0016] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the sliding frame of this utility model;

[0019] Figure 3 This is a schematic diagram of the hook of this utility model;

[0020] Figure 4 This is a schematic diagram of sawtooth plate one and sawtooth plate two of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Platform; 2. Motor; 3. Bidirectional screw; 4. Sliding frame; 5. Tensioner; 6. Sliding rod; 7. Telescopic rod; 8. Support plate; 9. Hook; 10. Damping shaft; 11. Locking block; 12. Serrated plate one; 13. Limiting groove; 14. Serrated plate two; 15. Buffer pad. Detailed Implementation

[0023] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0024] This utility model provides an improved device for testing the toughness of plastic wrap. The technical solution of this utility model is as follows:

[0025] like Figures 1-4 As shown, a plastic wrap toughness testing device includes a platform 1, a motor 2 installed on the inner wall of one side of the bottom of the platform 1, and a bidirectional screw 3 connected to one end of the output shaft of the motor 2 via a coupling; and also includes:

[0026] The testing organization is located on the outer wall of platform 1;

[0027] The testing mechanism includes sliding frames 4 installed on the outer walls of both sides of the bidirectional screw 3. The sliding frames 4 are respectively connected to the outer walls of both sides of the bidirectional screw 3 by threads. The outer walls of the top of the sliding frames 4 are provided with sliding grooves. The inner walls of the sliding grooves are slidably connected to sliding rods 6. The outer walls of the top of the sliding rods 6 are fixedly connected to support plates 8. The outer walls of both sides of the support plates 8 are fixedly connected to telescopic rods 7. The outer walls of the bottom end of the support plates 8 are fixedly connected to serrated plates 14. The outer walls of the top of the sliding frames 4 are fixedly connected to buffer pads 15. The outer walls of the top of the buffer pads 15 are fixedly connected to serrated plates 12. A tensile testing machine 5 is installed on the outer wall of the sliding frames 4. A damping shaft 10 is rotatably provided on one side of the outer wall of the support plates 8. A hook 9 is fixedly connected to the outer wall of the damping shaft 10. A locking block 11 is fixedly connected to one side of the top of the sliding frames 4.

[0028] Furthermore, a limiting groove 13 is provided on one side of the outer wall of the top of the hook 9. The limiting groove 13 is adapted to the size of the locking block 11. The outer walls of the first serrated plate 12 and the second serrated plate 14 are provided with anti-slip teeth. The sizes of the first serrated plate 12 and the second serrated plate 14 are adapted to each other.

[0029] Furthermore, the sliding frame 4 is slidably connected to the inner wall of the platform 1, the first serrated plate 12 and the second serrated plate 14 are adapted to the size of the cling film body, and several irradiation heads are installed on the bottom outer wall of the telescopic rod 7. The irradiation heads are adapted to the height of the sliding frame 4, and the second serrated plate 14 is located directly above the first serrated plate 12.

[0030] Working principle: When testing the toughness of the plastic wrap, the plastic wrap is placed between the first serrated plate 12 and the second serrated plate 14 at the top of the two sliding frames 4. Then, the support plate 8 is pressed down, and the slide rod 6 at the bottom of the support plate 8 slides in the slide groove at the top of the sliding frame 4. The first serrated plate 12 and the second serrated plate 14 together limit and fix the plastic wrap, and the buffer pad 15 is compressed. Then, the damping shaft 10 is pushed, causing the hook 9 to rotate and connect with the locking block 11 at the top of the sliding frame 4 through the limiting groove 13, preventing the first serrated plate 12 and the second serrated plate 14 from loosening. The motor 2 is started, and the bidirectional screw 3 rotates, thereby... The two sliding frames 4 are separated, and the plastic wrap is pulled to ensure that the plastic wrap is subjected to uniform tension during the stretching process and to avoid stress concentration. The tension machine 5 between the sliding frames 4 detects the tension. When the plastic wrap breaks, the tension value is recorded. After the test is completed, the hook 9 is pushed to separate from the locking block 11, the buffer pad 15 is reset, and the first serrated plate 12 and the second serrated plate 14 are separated. The plastic wrap is removed and replaced, and the operation is repeated. The support plates 8 on the two sliding frames 4 are connected by the telescopic rod 7, which makes it easy to press the telescopic rod 7 so that the two support plates 8 slide down at the same time to fix and limit the two ends of the plastic wrap.

[0031] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. A device for testing the toughness of plastic wrap, comprising a platform (1), wherein a motor (2) is installed on the inner wall of one side of the bottom of the platform (1), and one end of the output shaft of the motor (2) is connected to a bidirectional screw (3) via a coupling, characterized in that: Also includes; The testing organization is located on the outer wall of the platform (1); The detection mechanism includes sliding frames (4) installed on the outer walls of both sides of the bidirectional screw (3). The sliding frames (4) are respectively threaded to the outer walls of both sides of the bidirectional screw (3). The outer walls of the top of the sliding frames (4) are provided with sliding grooves. The inner walls of the sliding grooves are slidably connected to sliding rods (6). The outer walls of the top of the sliding rods (6) are fixedly connected to support plates (8). The outer walls of both sides of the support plates (8) are fixedly connected to telescopic rods (7). The outer walls of the bottom end of the support plates (8) are fixedly connected to... A second serrated plate (14) is attached to the top outer wall of the sliding frame (4), a buffer pad (15) is fixedly connected to the top outer wall of the buffer pad (15), a first serrated plate (12) is fixedly connected to the top outer wall of the sliding frame (4), a tensioning machine (5) is installed on the outer wall of the sliding frame (4), a damping shaft (10) is rotatably provided on one side outer wall of the support plate (8), a hook (9) is fixedly connected to the outer wall of the damping shaft (10), and a locking block (11) is fixedly connected to one side outer wall of the top of the sliding frame (4).

2. The plastic wrap toughness testing device according to claim 1, characterized in that: A limiting groove (13) is provided on one side of the top of the hook (9), and the limiting groove (13) is adapted to the size of the locking block (11).

3. The plastic wrap toughness testing device according to claim 1, characterized in that: The outer walls of the first sawtooth plate (12) and the second sawtooth plate (14) are provided with anti-slip teeth, and the dimensions of the first sawtooth plate (12) and the second sawtooth plate (14) are adapted to each other.

4. The plastic wrap toughness testing device according to claim 1, characterized in that: The sliding frame (4) is slidably connected to the inner wall of the platform (1), and the first serrated plate (12) and the second serrated plate (14) are adapted to the size of the plastic wrap body.

5. The plastic wrap toughness testing device according to claim 1, characterized in that: The bottom outer wall of the telescopic rod (7) is equipped with several irradiation heads, the height of which is adapted to the height of the sliding frame (4), and the second sawtooth plate (14) is located directly above the first sawtooth plate (12).

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