A tensile testing device for multi-point plastic cling film

Abstract

The utility model discloses a kind of tension testing devices of multipoint position plastic preservative film, it is related to tension testing equipment technical field, including base, the outside wall of base is equipped with shaft, the outer wall of shaft is equipped with clamping plate, the top of base is equipped with transparent shield, the outside wall of transparent shield is equipped with clamping bar. The utility model is equipped with base, shaft, clamping plate, transparent shield, clamping bar, limit rod and limit spring, when tension test is needed to preservative film, transparent shield is lifted, then clamping plate is rotated around shaft, clamping plate and clamping bar are engaged and connected, transparent shield is supported, then after clamping into preservative film, clamping plate is reversely rotated, at this time, transparent shield is pushed down by the elasticity of limit spring, so that transparent shield and base are closed, safety protection is carried out, preservative film is prevented from being stretched and broken, so that the skin or eye of staff is caused damage by splashed fragments.

Description

Technical Field

[0001] This utility model relates to the technical field of tensile testing equipment, specifically a tensile testing device for multi-point plastic cling film. Background Technology

[0002] Plastic cling film is widely used in food and pharmaceutical packaging. High-tensile-strength cling film is convenient to use, and during storage and transportation, packaging bags with high tensile strength are less likely to be punctured or damaged. Sufficient tear resistance can reduce tear propagation, thus avoiding problems such as poor sealing, leakage, or missing packages. Therefore, tensile testing of cling film is necessary. However, existing cling film tensile testing devices have a single stretching angle, allowing only unidirectional stretching and failing to simulate actual multidirectional forces. Furthermore, existing clamps have poor stability in holding and fixing the cling film, easily leading to slippage and detachment during stretching. Additionally, when cling film breaks during stretching, the sharp edges of the fragments can easily cause injury to workers' eyes and skin. To solve these problems, a multi-point tensile testing device for plastic cling film is needed.

[0003] Existing tensile testing devices for plastic cling film cannot perform multi-point tensile testing. They can only perform unidirectional tensile testing, failing to simulate actual multi-directional forces. Furthermore, their clamping stability for the cling film is poor; the smooth clamp surface causes the cling film to easily slip and fall off, affecting the accuracy of the test data. Additionally, the cling film breaks when it reaches its tensile limit, and the sharp edges of the broken fragments can easily splash into workers' eyes or cause skin abrasions, posing a safety hazard. Therefore, there is an urgent need for a multi-point tensile testing device for plastic cling film. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a multi-point tensile testing device for plastic cling film, in order to solve the problems of existing plastic cling film tensile testing devices being unable to perform multi-point tensile testing, only capable of unidirectional tensile testing and unable to simulate actual multi-directional forces, having poor clamping stability for cling film, and the cling film easily slipping and falling off when the smooth clamp surface is subjected to force, affecting the accuracy of test data. At the same time, the cling film will break when it reaches the tensile limit threshold, and the edges of the broken fragments are relatively sharp, which can easily splash into the eyes of workers or cause scratches to the skin, posing a safety hazard.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tensile testing device for multi-point plastic cling film, comprising a base, a rotating shaft mounted on the outer wall of the base, a clamping plate mounted on the outer wall of the rotating shaft, a transparent cover mounted on the top of the base, a clamping rod mounted on the outer wall of the transparent cover, a limiting rod mounted on the bottom of the transparent cover, and a limiting spring mounted on the outer wall of the limiting rod.

[0006] A support base is installed at the bottom of the machine base, a synchronous motor is installed on the side wall of the machine base, and a telescopic rod is installed on the outer wall of the synchronous motor.

[0007] A fixed platform is installed on the outer wall of the telescopic rod, a positioning rod is installed on the inner wall of the fixed platform, a return spring is installed on the outer wall of the positioning rod, several anti-slip grooves are opened on the bottom inner wall of the fixed platform, an adjusting rod is installed on the inner wall of the fixed platform, a pressure plate is installed at the bottom of the adjusting rod, several anti-slip balls are installed at the bottom of the pressure plate, and a sensor is installed on the top of the base.

[0008] Preferably, the card plate forms a rotating structure with the machine base via a rotating shaft, and the card plate is engaged with the card rod.

[0009] Preferably, the limiting rod is symmetrically arranged with the central axis of the transparent cover as the center, and the limiting rod and the base form a telescopic structure through the limiting spring.

[0010] Preferably, the synchronous motors are arranged in a rectangular array with the central axis of the base as the center, and the telescopic rods are welded to the fixed platform.

[0011] Preferably, the pressure plate forms a telescopic structure with the positioning rod via a reset spring, and the adjusting rod is threadedly connected to the fixed platform.

[0012] Preferably, the adjusting rod is movably connected to the pressure plate, and the anti-slip ball is engaged with the anti-slip groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, through its base, rotating shaft, clamping plate, transparent cover, clamping rod, limiting rod, and limiting spring, allows for the following operation when a tensile test of cling film is required: the transparent cover is lifted, the clamping plate is rotated around the rotating shaft to engage with the clamping rod, supporting the transparent cover; after the cling film is inserted, the clamping plate is rotated in the opposite direction, at which point the transparent cover is pushed downwards by the elastic force of the limiting spring, closing the transparent cover with the base for safety protection, preventing the cling film from being stretched and broken, thus avoiding flying fragments that could injure the skin or eyes of workers.

[0014] 2. This utility model, through the setting of synchronous motors and telescopic rods, and the setting of multiple synchronous motors and telescopic rods, can simultaneously perform tensile tests on the horizontal and vertical directions of the plastic wrap. Compared with the traditional unidirectional tensile test, it achieves more comprehensive data, can simulate the actual multidirectional force situation of the plastic wrap, and is more practical.

[0015] 3. This utility model uses a support base, a fixed platform, a positioning rod, a return spring, an anti-slip groove, an adjusting rod, a pressure plate, anti-slip balls, and a sensor to hold the plastic wrap flat on the support base. Then, the edges of the plastic wrap are placed into the fixed platform. The pressure plate is then pressed down by rotating the adjusting rod to clamp and fix the edges of the plastic wrap. The anti-slip groove and anti-slip balls increase the contact area with the surface of the plastic wrap. The interlocking between the anti-slip groove and the anti-slip balls increases the stability of the plastic wrap clamping and prevents the plastic wrap from slipping and falling off during tensile testing. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the present utility model from the front view; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a side view of the structure of this utility model; Figure 4 This is a structural schematic diagram showing the components surrounding the slide table of this utility model disassembled; Figure 5 This is a schematic diagram showing the internal cross-section of the cleaning cotton brush of this utility model.

[0017] In the diagram: 1. Base; 2. Rotating shaft; 3. Clamping plate; 4. Transparent cover; 5. Clamping rod; 6. Limiting rod; 7. Limiting spring; 8. Support base; 9. Synchronous motor; 10. Telescopic rod; 11. Fixed platform; 12. Positioning rod; 13. Return spring; 14. Anti-slip groove; 15. Adjusting rod; 16. Pressure plate; 17. Anti-slip ball; 18. Sensor. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] The embodiments of this utility model will be described below based on its overall structure.

[0020] Please see Figures 1-5A multi-point tensile testing device for plastic cling film includes a base 1, a rotating shaft 2 mounted on the outer wall of the base 1, a clamping plate 3 mounted on the outer wall of the rotating shaft 2, a transparent cover 4 mounted on the top of the base 1, a clamping rod 5 mounted on the outer wall of the transparent cover 4, a limiting rod 6 mounted on the bottom of the transparent cover 4, and a limiting spring 7 mounted on the outer wall of the limiting rod 6. The clamping plate 3 forms a rotating structure with the base 1 via the rotating shaft 2, and the clamping plate 3 is engaged with the clamping rod 5. The limiting rod 6 is symmetrically arranged around the central axis of the transparent cover 4, and the limiting rod 6 forms a telescopic structure with the base 1 via the limiting spring 7. The machine consists of a base 1, a rotating shaft 2, a clamping plate 3, a transparent cover 4, a clamping rod 5, a limiting rod 6, and a limiting spring 7. When a tensile test is required on the cling film, the transparent cover 4 is lifted, and then the clamping plate 3 is rotated around the rotating shaft 2 to engage with the clamping rod 5, supporting the transparent cover 4. After the cling film is inserted, the clamping plate 3 is rotated in the opposite direction. At this time, the transparent cover 4 is pushed downward by the elastic force of the limiting spring 7, closing the transparent cover 4 with the base 1 for safety protection, preventing the cling film from being stretched and broken, which could cause flying fragments to injure the skin or eyes of the workers.

[0021] Please see Figures 1-5 A multi-point tensile testing device for plastic cling film is disclosed. A support base 8 is installed at the bottom of the base 1. A synchronous motor 9 is installed on the side wall of the base 1, and a telescopic rod 10 is installed on the outer wall of the synchronous motor 9. The synchronous motors 9 are arranged in a rectangular array centered on the central axis of the base 1, and the telescopic rods 10 are welded to a fixed platform 11. Through the arrangement of multiple synchronous motors 9 and telescopic rods 10, tensile testing of the cling film can be performed simultaneously in both the transverse and longitudinal directions. Compared with traditional unidirectional tensile testing, this provides more comprehensive data, simulates the actual multidirectional stress conditions of the cling film, and is more practical.

[0022] Please see Figures 1-5A multi-point tensile testing device for plastic cling film includes a fixed platform 11 mounted on the outer wall of a telescopic rod 10, a positioning rod 12 mounted on the inner wall of the fixed platform 11, a return spring 13 mounted on the outer wall of the positioning rod 12, several anti-slip grooves 14 formed on the bottom inner wall of the fixed platform 11, an adjusting rod 15 mounted on the inner wall of the fixed platform 11, a pressure plate 16 mounted on the bottom of the adjusting rod 15, several anti-slip balls 17 mounted on the bottom of the pressure plate 16, a sensor 18 mounted on the top of the base 1, the pressure plate 16 forming a telescopic structure with the positioning rod 12 via the return spring 13, the adjusting rod 15 threadedly connected to the fixed platform 11, and the adjusting rod 15 movably connected to the pressure plate 16, with the anti-slip balls 17 and... The anti-slip groove 14 is engaged and connected. Through the support base 8, fixed platform 11, positioning rod 12, return spring 13, anti-slip groove 14, adjusting rod 15, pressure plate 16, anti-slip ball 17 and sensor 18, the plastic wrap is laid flat above the support base 8. Then, the edges of the plastic wrap are placed into the fixed platform 11. Then, by rotating the adjusting rod 15, the pressure plate 16 is pressed down to clamp and fix the edges of the plastic wrap. The anti-slip groove 14 and anti-slip ball 17 can increase the contact area with the surface of the plastic wrap. The interlocking between the anti-slip groove 14 and anti-slip ball 17 increases the stability of clamping the plastic wrap and prevents the plastic wrap from slipping and falling off during the tensile test.

[0023] Working principle: In use, when a tensile test is required on the cling film, first lift the transparent cover 4, then rotate the clamping plate 3 around the pivot 2 to engage with the clamping rod 5, supporting the transparent cover 4. Then, place the cling film flat on the support base 8, and then place the edges of the cling film into the fixing platform 11. Then, rotate the adjusting rod 15 to drive the pressure plate 16 down, clamping and fixing the edges of the cling film. The anti-slip groove 14 and anti-slip ball 17 increase the contact area with the cling film surface. The interlocking between the anti-slip groove 14 and the anti-slip ball 17 increases the stability of the cling film clamping, preventing the cling film from slipping and falling off during the tensile test. After the cling film is fixed, rotate the clamping plate 3 in the opposite direction. At this time, the transparent cover 4 passes through... The limiting spring 7 pushes downwards, closing the transparent cover 4 with the base 1 for safety protection, preventing the plastic wrap from being stretched and broken, which could cause flying fragments to injure the skin or eyes of the workers. Then, the synchronous motor 9 is activated to drive the telescopic rod 10 to stretch outwards simultaneously. The arrangement of multiple synchronous motors 9 and telescopic rods 10 allows for simultaneous tensile testing of the plastic wrap in both the lateral and longitudinal directions. Compared to traditional unidirectional tensile testing, this provides more comprehensive data and can simulate the actual multidirectional stress conditions of the plastic wrap, making it more practical. Finally, the plastic wrap breaks, and the sensor 18 obtains the stress and tensile data of the plastic wrap in different directions. This completes the use of the device. Any content not described in detail in this specification is prior art known to those skilled in the art.

[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-point plastic cling film tensile testing device comprising a base (1) characterised in that: A rotating shaft (2) is installed on the outer wall of the base (1), a clamping plate (3) is installed on the outer wall of the rotating shaft (2), a transparent cover (4) is installed on the top of the base (1), a clamping rod (5) is installed on the outer wall of the transparent cover (4), a limiting rod (6) is installed at the bottom of the transparent cover (4), and a limiting spring (7) is installed on the outer wall of the limiting rod (6). A support base (8) is installed at the bottom of the base (1), a synchronous motor (9) is installed on the side wall of the base (1), and a telescopic rod (10) is installed on the outer wall of the synchronous motor (9). A fixed platform (11) is installed on the outer wall of the telescopic rod (10), a positioning rod (12) is installed on the inner wall of the fixed platform (11), a return spring (13) is installed on the outer wall of the positioning rod (12), a number of anti-slip grooves (14) are opened on the bottom inner wall of the fixed platform (11), an adjusting rod (15) is installed on the inner wall of the fixed platform (11), a pressure plate (16) is installed at the bottom of the adjusting rod (15), a number of anti-slip balls (17) are installed at the bottom of the pressure plate (16), and a sensor (18) is installed on the top of the base (1).

2. The apparatus for testing the tensile strength of a multipoint plastic cling film according to claim 1, wherein: The card plate (3) forms a rotating structure with the base (1) through the rotating shaft (2), and the card plate (3) is engaged with the card rod (5).

3. The apparatus for testing the tensile strength of a multipoint plastic cling film according to claim 1, wherein: The limiting rod (6) is symmetrically arranged with the central axis of the transparent cover (4) as the center, and the limiting rod (6) forms a telescopic structure with the base (1) through the limiting spring (7).

4. The apparatus for testing the tensile strength of a multipoint plastic cling film according to claim 1, wherein: The synchronous motors (9) are arranged in a rectangular array with the central axis of the base (1) as the center, and the telescopic rods (10) are welded to the fixed platform (11).

5. The apparatus for testing the tensile strength of a multipoint plastic cling film according to claim 1, wherein: The pressure plate (16) forms a telescopic structure with the positioning rod (12) through the return spring (13), and the adjusting rod (15) is threadedly connected to the fixed platform (11).

6. The apparatus of claim 1, wherein: the plurality of points are arranged in a pattern. The adjusting rod (15) is movably connected to the pressure plate (16), and the anti-slip ball (17) is engaged with the anti-slip groove (14).

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