Film softness testing instrument

Abstract

The utility model provides a kind of film softness detection instrument, bottom plate one end is equipped with first support rod, first support rod is equipped with fixed clamp, bottom plate other end is equipped with second support rod, second support rod lower end is slidably connected with bottom plate, test platform is equipped on second support rod, test platform is slidably connected with second support rod, test platform end surface is equipped with weight response sensor, second support rod is equipped with lifting device, lifting device is connected with test platform, lifting device drives up and down movement.This detection instrument is cooperated with liftable test platform by fixed clamp, combines weight response sensor and displacement recording system, realizes dynamic, continuous measurement to film softness.

Description

Technical Field

[0001] This utility model relates to the field of film flexibility testing, and in particular to a film flexibility testing instrument. Background Technology

[0002] In the application of film materials, especially multilayer co-extruded infusion films used for pharmaceutical packaging, their flexibility directly affects the safety and performance of the product.

[0003] Infusion bags may be subjected to impacts such as collisions or drops during transportation and use. If the film is not flexible enough, its impact resistance is poor, and it is prone to tearing due to stress concentration, leading to leakage, waste of medicine, and safety risks. The flexibility of the film is closely related to its stiffness. At the same thickness, the more flexible the film, the stronger its bending ability and the lower its stiffness.

[0004] Traditional softness assessments rely heavily on subjective feel or experience, lacking scientific and quantitative testing methods, making it difficult to accurately compare films produced using different materials or processes. Current technologies lack a testing method and equipment capable of converting film softness into quantifiable data, thus failing to meet the demands for precise control of film performance in industrial production.

[0005] Therefore, there is an urgent need for a testing instrument and method that is structurally sound, easy to operate, and capable of digitally characterizing the flexibility of thin films, so as to achieve an objective evaluation of the flexibility of thin films and improve the level of product quality control. Utility Model Content

[0006] The main purpose of this invention is to provide a thin film flexibility testing instrument, which solves the technical problem that traditional thin film flexibility testing lacks quantitative means, relies on subjective judgment, and is difficult to scientifically evaluate and compare the flexibility performance of thin films.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a film flexibility testing instrument, wherein a first support rod is provided at one end of the base plate, a fixing clamp is provided on the first support rod, a second support rod is provided at the other end of the base plate, the lower end of the second support rod is slidably connected to the base plate, a testing platform is provided on the second support rod, the testing platform is slidably connected to the second support rod, a weight sensing sensor is provided on the end face of the testing platform, a lifting device is provided on the second support rod, the lifting device is connected to the testing platform, and the lifting device is driven to move up and down.

[0008] In the preferred embodiment, the fixing clamp includes a fixing plate, which is mounted on the first support rod. A fixing plate is also provided above the fixing plate, and quick clamps are provided on both sides of the fixing plate. The clamping adjustment rod of the quick clamp is fixedly connected to the end of the fixing plate.

[0009] In the preferred embodiment, the clamping adjustment rod of the quick clamp is slidably connected to the guide hole on one side of the fixed clamping plate. The quick clamp is set on the clamp mounting plate. The lower end of the clamp mounting plate is hinged to one end of the pull rod. The middle part of the pull rod is hinged to the lower end of the clamping adjustment rod through the pressure rod.

[0010] In the preferred embodiment, both the movable clamping plate and the fixed clamping plate have rubber pads on their clamping surfaces.

[0011] In the preferred embodiment, the bottom of the second support rod is set on the sliding plate, and the bottom plate is provided with multiple second slide rails, with the sliding plate and the second slide rails slidably connected.

[0012] In the preferred embodiment, the sliding plate is provided with multiple fixing nuts, which pass through the sliding plate and abut against the surface of the second slide rail, and the fixing nuts are threadedly connected to the sliding plate; A first handle is also provided on one side of the sliding plate.

[0013] In the preferred embodiment, the second support rod has a U-shaped structure, and multiple first slide rails are provided on one side of the second support rod, with the test platform slidably connected to the first slide rails.

[0014] In the preferred embodiment, the lifting device includes a drive motor, which is located at the top of the second support rod. The output end of the drive motor is connected to a screw, which is threadedly connected to the nut seat of the test platform. The screw is located in the hollow space in the middle of the second support rod.

[0015] In the preferred embodiment, the weight sensor is electrically connected to the data detection platform.

[0016] In the preferred embodiment, a second handle is also provided at both ends of the base plate.

[0017] This invention provides a thin film flexibility testing instrument. This instrument, through the cooperation of a fixed clamp and a liftable testing platform, combined with a weight sensor and a displacement recording system, achieves dynamic and continuous measurement of thin film flexibility. The test platform's vertical movement is controlled by a drive motor-driven screw transmission, ensuring smooth operation, precise positioning, and guaranteeing the repeatability of the testing process and the reliability of the data.

[0018] The testing platform integrates a high-precision weight sensor on its end face, which can sensitively capture changes in sample force, accurately determine the critical point of detachment from the support, and improve the accuracy of displacement readings. The second support rod is connected to the second slide rail on the base plate via a sliding plate, and its distance from the first support rod can be adjusted to meet the testing needs of samples of different lengths, enhancing the instrument's versatility.

[0019] The fixing fixture adopts a quick-clamp structure, combined with rubber pads, which can quickly clamp samples while effectively protecting the sample surface from damage, improving operational efficiency and ensuring test consistency. The overall structure is rationally designed, with all components working together. By calculating the product of displacement and thickness, the softness value is obtained, transforming the softness evaluation from qualitative to quantitative, which facilitates the performance comparison between different film materials.

[0020] Data can be collected and processed in real time through the data detection platform, which improves the automation level and analysis efficiency of detection and provides a scientific basis for the research, development, production and quality control of thin film materials. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a front view structural diagram of the testing instrument of this utility model; Figure 2 This is a general appearance structural diagram of the testing instrument of this utility model; Figure 3 This is a structural diagram of the fixing clamp of this utility model.

[0022] In the diagram: Fixed clamp 1; Movable clamp 101; Fixed clamp 102; Clamp mounting plate 103; Quick clamp 2; Pressure adjusting rod 201; Pressure rod 202; Pull-down rod 203; Guide hole 204; First support rod 3; Base plate 4; Drive motor 5; Second support rod 6; Test platform 7; Weight sensing sensor 701; Sliding plate 8; Fixed nut 9; Data detection platform 10; First handle 11; Second handle 12; Nut seat 13; Screw 14; First slide rail 15; Second slide rail 16. Detailed Implementation

[0023] like Figure 1-3 As shown, a film flexibility testing instrument has a base plate 4 with a first support rod 3 at one end and a fixing clamp 1 on the first support rod 3. The other end of the base plate 4 has a second support rod 6, the lower end of which is slidably connected to the base plate 4. A test platform 7 is provided on the second support rod 6 and is slidably connected to the second support rod 6. A weight sensing sensor 701 is provided on the end face of the test platform 7. A lifting device is provided on the second support rod 6 and is connected to the test platform 7. The lifting device is driven to move up and down.

[0024] In the preferred embodiment, the fixing clamp 1 includes a fixing clamp 102, which is mounted on the first support rod 3. The fixing clamp 102 is located above the fixing clamp 102, and quick clamps 2 are provided on both sides of the fixing clamp 102. The clamping adjustment rod 201 of the quick clamp 2 is fixedly connected to the end of the fixing clamp 102.

[0025] In the preferred embodiment, the clamping adjustment rod 201 of the quick clamp 2 is slidably connected to the guide hole 204 on one side of the fixed clamping plate 102. The quick clamp 2 is mounted on the clamp mounting plate 103. The lower end of the clamp mounting plate 103 is hinged to one end of the pull rod 203. The middle part of the pull rod 203 is hinged to the lower end of the clamping adjustment rod 201 through the pressure rod 202.

[0026] In the preferred embodiment, both the movable clamping plate 101 and the fixed clamping plate 102 have rubber pads on their clamping surfaces.

[0027] In the preferred embodiment, the bottom of the second support rod 6 is mounted on the sliding plate 8, and the base plate 4 is provided with multiple second slide rails 16, with the sliding plate 8 slidably connected to the second slide rails 16.

[0028] In the preferred embodiment, the sliding plate 8 is provided with a plurality of fixing nuts 9, the fixing nuts 9 pass through the sliding plate 8 and abut against the surface of the second slide rail 16, and the fixing nuts 9 are threadedly connected to the sliding plate 8; A first handle 11 is also provided on one side of the sliding plate 8.

[0029] In the preferred embodiment, the second support rod 6 has a gate-shaped structure, and multiple first slide rails 15 are provided on one side of the second support rod 6. The test platform 7 is slidably connected to the first slide rails 15.

[0030] In the preferred embodiment, the lifting device includes a drive motor 5, which is located at the top of the second support rod 6. The output end of the drive motor 5 is connected to the screw 14, which is threadedly connected to the nut seat 13 of the test platform 7. The screw 14 is located in the hollowed-out middle part of the second support rod 6.

[0031] In the preferred embodiment, the weight sensor 701 is electrically connected to the data detection platform 10.

[0032] In the preferred embodiment, the base plate 4 is also provided with a second handle 12 at both ends.

[0033] This thin film flexibility testing instrument achieves quantitative detection of thin film flexibility properties through a scientifically designed structure. The base plate 4 serves as the fundamental support for the entire instrument. One end is equipped with a first support rod 3 for mounting and fixing the clamp 1 to hold one end of the sample; the other end is equipped with a second support rod 6, the lower end of which is slidably connected to the base plate 4, allowing its position to be adjusted to accommodate samples of different lengths. A testing platform 7 is mounted on the second support rod 6, slidably connected to it and capable of smooth vertical movement driven by a lifting device. A weight sensor 701 is installed on the end face of the testing platform 7 to monitor the pressure changes of the sample on the platform in real time during testing. When the pressure drops to zero, it is the critical point at which the sample detaches from the support. At this point, the displacement value s is recorded. Combined with the sample thickness h, the flexibility is calculated using the formula μ=s×h, achieving digital characterization of flexibility.

[0034] The fixed clamp 1 includes a fixed clamping plate 102 fixed to the first support rod 3, a movable clamping plate 101 above it, and quick clamps 2 on both sides. The clamping adjustment rod 201 of the quick clamp 2 is fixedly connected to the end of the fixed clamping plate 102. By operating the clamping adjustment rod 201, the movable clamping plate 101 can be quickly clamped or released, which facilitates the clamping and replacement of samples. Furthermore, the clamping adjustment rod 201 can slide within the guide hole 204 on one side of the fixed clamping plate 102 to ensure smooth movement; the quick clamp 2 is mounted on the clamping mounting plate 103, the lower end of the clamping mounting plate 103 is hinged to one end of the pull rod 203, and the middle part of the pull rod 203 is hinged to the lower end of the clamping adjustment rod 201 through the pressure rod 202 to form a linkage structure. When the clamping adjustment rod 201 is pulled down, the pressure rod 202 drives the pull rod 203 to pull the clamping mounting plate 103 down, thereby clamping the movable clamping plate 101, realizing a fast, uniform and reliable clamping force, improving operating efficiency and test consistency.

[0035] To prevent sample damage during clamping, rubber pads are provided on the clamping surfaces of both the movable clamping plate 101 and the fixed clamping plate 102. These pads protect the film surface and increase friction to prevent sample slippage. The bottom of the second support rod 6 is fixed to the sliding plate 8, which is slidably connected to multiple second slide rails 16 on the base plate 4, ensuring smooth and accurate movement of the second support rod 6. Multiple fixing nuts 9 are provided on the sliding plate 8. When tightened, the ends of the nuts abut against the surface of the second slide rails 16, thereby locking and positioning the sliding plate 8 to prevent displacement during testing. A first handle 11 is provided on one side of the sliding plate 8 for manual adjustment. The second support rod 6 adopts a U-shaped structure, with multiple first slide rails 15 on one side. The testing platform 7 is slidably connected to the first slide rails 15, ensuring smooth and unbiased operation of the testing platform 7 during lifting and lowering.

[0036] The lifting device is driven by a drive motor 5, which is mounted on the top of the second support rod 6. Its output end is connected to a screw 14, which passes through the hollowed-out area in the middle of the second support rod 6 and is threadedly connected to a nut seat 13 on the test platform 7. When the drive motor 5 rotates forward and backward, it drives the screw 14 to rotate, thereby driving the test platform 7 to move up and down along the first slide rail 15, achieving precise control of displacement speed and position. A weight sensor 701 is electrically connected to the data detection platform 10, transmitting real-time pressure data to the platform for recording, display, and analysis, facilitating automatic determination of the pressure zeroing point and calculation of softness. Second handles 12 are provided at both ends of the base plate 4 for convenient overall handling and positioning, improving the ease of use of the instrument.

[0037] When using this instrument, firstly, move the sliding plate 8 using the first handle 11 to drive the second support rod 6 to slide along the second slide rail 16, adjusting the distance between it and the first support rod 3 to accommodate the sample length. After adjustment, tighten the fixing nut 9 to lock the position. Place one end of the sample into the fixing clamp 1, operate the pressure adjustment rod 201 of the quick clamp 2, and press the movable clamp 101 through the linkage structure of the pressure rod 202 and the pull rod 203 to complete the fixing of one end of the sample. Place the other end of the sample flat on the end face of the test platform 7, start the drive motor 5, drive the screw 14 to rotate, and drive the test platform 7 to descend uniformly along the first slide rail 15. The weight sensor 701 monitors the pressure in real time. When the pressure value drops to zero, record the displacement distance s of the test platform 7 at this time. Combined with the known sample thickness h, calculate the softness μ=s×h. The test data is automatically collected and processed by the data detection platform 10. After the test is completed, reverse the motor to reset the platform, release the quick clamp 2 to remove the sample, and repeat the test for at least 5 samples and take the average value.

[0038] This instrument, through the cooperation of a fixed clamp 1 and a height-adjustable testing platform 7, combined with a weight sensor 701 and a displacement recording system, achieves dynamic, continuous, and quantitative detection of film flexibility. The drive motor 5, in conjunction with the screw 14, ensures smooth operation and precise positioning of the testing platform 7, guaranteeing test repeatability. The weight sensor 701 has high sensitivity and can accurately capture the critical point of pressure change, improving measurement accuracy. The second support rod 6 is adjustable to accommodate different sample lengths, enhancing versatility. The quick-clamping fixture 2 is easy to operate, provides a secure grip, and a rubber pad protects the sample from damage. The sliding plate 8 cooperates with the second slide rail 16 and is locked in place with the fixing nut 9, ensuring test stability. The overall structure is reasonable, with a high degree of automation, and the test results are objective and reliable, facilitating the scientific comparison of the flexibility properties of different film materials and providing an effective technical means for film quality control.

[0039] Example 2 Further explanation in conjunction with Example 1, such as Figure 1-3 As shown, firstly, the film sample to be tested is cut to the specified dimensions: 15mm wide and 100mm long + clamping length, ensuring the sample surface is flat and undamaged. The base plate 4 is placed on a horizontal platform, and all instrument components are checked to ensure they are in their initial state. By operating the first handle 11, the sliding plate 8 is moved, causing the second support rod 6, mounted on the sliding plate 8, to slide along the second slide rail 16 on the base plate 4. The distance between the second support rod 6 and the first support rod 3 is adjusted to accommodate the sample length. After adjustment, the fixing nut 9 is tightened to fix the sliding plate 8 on the second slide rail 16, thereby fixing the position of the second support rod 6.

[0040] Next, one end of the sample is placed in the fixed clamp 1, which includes a fixed clamping plate 102 and a movable clamping plate 101. Both the movable clamping plate 101 and the fixed clamping plate 102 have rubber pads on their clamping surfaces to prevent damage to the sample. By operating the quick clamp 2, its pressure adjustment rod 201 is fixedly connected to the end of the fixed clamping plate 102 and hinged to the pull-down rod 203 via the pressure rod 202. The other end of the pull-down rod 203 is hinged to the clamp mounting plate 103. Pulling down the pressure adjustment rod 201 of the quick clamp 2 moves the pressure rod 202 and the pull-down rod 203, causing the movable clamping plate 101 to press down on the sample, achieving quick and secure clamping.

[0041] Then, place the other end of the sample flat on the end face of the test platform 7, ensuring good contact between the sample and the test platform 7 without applying force. The test platform 7 is threadedly connected to the screw 14 via the nut seat 13, and the screw 14 is driven by the drive motor 5 located at the top of the second support rod 6. Starting the drive motor 5 causes the screw 14 to rotate, moving the test platform 7 smoothly downwards along the first slide rail 15 on one side of the second support rod 6. A weight sensor 701 is provided on the end face of the test platform 7 to monitor the pressure on the platform in real time.

[0042] During the downward movement of the test platform 7, when the weight sensor 701 detects a pressure value of exactly zero, it indicates that the sample has begun to detach from the support of the test platform 7 but has not yet been stretched. At this point, the displacement distance s of the test platform 7 is recorded. This displacement distance s is multiplied by the sample thickness h to calculate the flexibility μ = s × h. The larger the flexibility value, the more flexible the film. The weight sensor 701 transmits the data in real time to the data detection platform 10 for recording and processing.

[0043] After the test is completed, the drive motor 5 reverses, causing the test platform 7 to rise back to its initial position, releasing the quick clamp 2, and removing the sample. At least five samples of each type of film are tested, and the average softness is taken as the final test result to ensure the accuracy and representativeness of the data. Throughout the test, the instrument can be easily moved and positioned using the second handles 12 located at both ends of the base plate 4.

[0044] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A film flexibility testing instrument, characterized in that: The base plate (4) has a first support rod (3) at one end, and a fixing clamp (1) is provided on the first support rod (3). The base plate (4) has a second support rod (6) at the other end. The lower end of the second support rod (6) is slidably connected to the base plate (4). The second support rod (6) is provided with a test platform (7). The test platform (7) is slidably connected to the second support rod (6). The end face of the test platform (7) is provided with a weight sensing sensor (701). The second support rod (6) is provided with a lifting device. The lifting device is connected to the test platform (7). The lifting device is driven to move up and down.

2. The thin film flexibility testing instrument according to claim 1, characterized in that: The fixed clamp (1) includes a fixed clamp plate (102), which is mounted on the first support rod (3). A fixed clamp plate (102) is provided above the fixed clamp plate (102), and quick clamps (2) are provided on both sides of the fixed clamp plate (102). The clamping adjustment rod (201) of the quick clamp (2) is fixedly connected to the end of the fixed clamp plate (102).

3. The thin film flexibility testing instrument according to claim 2, characterized in that: The clamping adjustment rod (201) of the quick clamp (2) is slidably connected to the guide hole (204) on one side of the fixed clamping plate (102). The quick clamp (2) is set on the clamp mounting plate (103). The lower end of the clamp mounting plate (103) is hinged to one end of the pull rod (203). The middle part of the pull rod (203) is hinged to the lower end of the clamping adjustment rod (201) through the pressure rod (202).

4. The thin film flexibility testing instrument according to claim 2, characterized in that: Both the movable clamping plate (101) and the fixed clamping plate (102) have rubber pads on their clamping surfaces.

5. The thin film flexibility testing instrument according to claim 1, characterized in that: The bottom of the second support rod (6) is set on the sliding plate (8), and the bottom plate (4) is provided with multiple second slide rails (16). The sliding plate (8) and the second slide rails (16) are slidably connected.

6. The thin film flexibility testing instrument according to claim 5, characterized in that: The sliding plate (8) is provided with multiple fixing nuts (9), the fixing nuts (9) pass through the sliding plate (8) and abut against the surface of the second slide rail (16), and the fixing nuts (9) are threadedly connected to the sliding plate (8); A first handle (11) is also provided on one side of the sliding plate (8).

7. The thin film flexibility testing instrument according to claim 1, characterized in that: The second support rod (6) has a gate-shaped structure. Multiple first slide rails (15) are provided on one side of the second support rod (6). The test platform (7) is slidably connected to the first slide rails (15).

8. The thin film flexibility testing instrument according to claim 7, characterized in that: The lifting device includes a drive motor (5), which is located on the top of the second support rod (6). The output end of the drive motor (5) is connected to the screw (14), and the screw (14) is threadedly connected to the nut seat (13) of the test platform (7). The screw (14) is located in the hollowed-out middle part of the second support rod (6).

9. The thin film flexibility testing instrument according to claim 1, characterized in that: The weight sensor (701) is electrically connected to the data detection platform (10).

10. The thin film flexibility testing instrument according to claim 1, characterized in that: The base plate (4) is also equipped with a second handle (12) at both ends.

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