Thin film tensile strength and elongation testing device

Abstract

The utility model discloses a film tensile strength and elongation testing device, which belongs to the technical field of film detection and comprises a base, mounting frames are arranged on two sides of two ends of the top of the base, a winding drum is connected between the mounting frames at the same end through a connecting shaft, a clamping plate is arranged at the top of the winding drum, and telescopic frames are arranged at two ends of the bottom of the clamping plate. A telescopic groove is formed in the top of the winding drum, a positioning notch is formed in the bottom end of the telescopic frame, a positioning frame is arranged at the bottom end of the interior of the telescopic groove, protrusions are arranged at the two ends of the inner side of the positioning frame, a shifting plate is arranged at one end of the positioning frame, and a positioning spring is arranged on the other side of the shifting plate. The device is simple in structure and matched with the winding drum to achieve the function of clamping and positioning the two ends of the thin film, then the rotary knob is rotated to drive the winding drum to wind the thin film, it is ensured that the thin film is in a tightened state, the situation that the thin film is loosened or disengaged can be effectively avoided in a winding and winding mode, and the stability of the thin film in the testing process is greatly ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of thin film performance detection, and particularly relates to a device for testing the tensile strength and elongation rate of a thin film. Background Art

[0002] As a raw material for the production of coated filter media, PTFE (polytetrafluoroethylene) thin film has performance indicators such as porosity, pore size, thickness, tensile strength and elongation rate, which play an important role in the production of qualified coated filter media. More and more coated filter media manufacturers have begun to pay attention to the impact of the tensile strength and elongation rate of PTFE film on the product, so the detection of PTFE thin film has become more and more strict.

[0003] At present, in the existing device for testing the tensile strength and elongation rate of a thin film, during the use process, due to the reason of the thin film's own material, the fixing effect is poor during the test, and the thin film is prone to looseness or falling off, resulting in test failure. For this reason, we propose a device for testing the tensile strength and elongation rate of a thin film. Content of the Utility Model

[0004] The purpose of the utility model is to provide a device for testing the tensile strength and elongation rate of a thin film to solve the existing problems mentioned in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A device for testing the tensile strength and elongation rate of a thin film, including a base, a reel and a clamping plate. On both sides of the two ends of the top of the base, mounting frames are slidably connected. Between the mounting frames at the same end, a reel is movably connected through a connecting shaft. A clamping plate is arranged on the top of the reel. At both ends of the bottom of the clamping plate, telescopic frames are arranged. At both ends and inside the top of the reel, telescopic grooves are opened. The telescopic frames are placed inside the telescopic grooves and slidably connected with their inner walls. At both sides of the bottom end of the telescopic frame, positioning notches are opened. Horizontally slidably arranged inside the bottom end of the telescopic groove is a positioning frame. At both ends of the inner side of the positioning frame, protrusions are arranged. At one end of the positioning frame, a dial is fixedly installed. The dial extends to the outside of the bottom of the reel and is slidably connected with it. On the other side of the dial, a positioning spring is arranged.

[0006] Preferably, at the end of the connecting shaft at one end of the reel, a spring cylinder is arranged. Inside the end of the spring cylinder away from the connecting shaft, a telescopic column is slidably connected through a limiting groove and a limiting block provided. At the end of the telescopic column, a knob is fixedly installed. On the outer periphery of one side of the knob, a positioning column is fixedly arranged. On one side of the outer ring of the bearing outside the spring cylinder, positioning holes are opened around the spring cylinder. Inside the spring cylinder, a return spring is arranged. The two ends of the return spring are respectively fixedly connected with the telescopic column and the spring cylinder.

[0007] Preferably, a jacking spring is arranged inside the telescopic groove, and two ends of the jacking spring are fixedly connected to the bottom of the telescopic frame and the inner bottom surface of the telescopic groove respectively.

[0008] Preferably, anti-slip pads are provided on the top surfaces of both the top of the winding drum and the clamping plate, and the anti-slip pads are fixedly connected to the winding drum and the clamping plate respectively by gluing.

[0009] Preferably, a sliding groove is provided on the top surface of the base, an activity frame is arranged inside the sliding groove, two ends of the top of the activity frame are fixedly connected to the bottoms of two mounting frames located at the same end of the top of the base respectively, a bidirectional screw rod is spirally connected to the middle of the bottom end of the activity frame through a threaded sleeve, and a driving motor is arranged at one end of the bidirectional screw rod.

[0010] Preferably, two ends of the bottom of the activity frame are slidably connected with limiting rods, and two ends of the limiting rods are fixedly connected to the inside of the shell of the base by welding.

[0011] Preferably, a control panel is fixedly arranged on one side of the outside of the base, and the control panel is fixedly installed on one side of the outside of the base by embedding.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. Through the dial plate, the positioning frame and the protrusions inside it, the function of positioning the telescopic frame and the clamping plate is realized. Cooperating with the winding drum, the function of clamping and positioning both ends of the film is realized. Then, by rotating the knob, the winding drum drives the film to be wound, ensuring that the film is in a taut state. And through the winding and winding method, the situation that the film is loose or detached can be effectively avoided, greatly ensuring the stability of the film during the test.

[0014] 2. Through the provided spring cylinder, telescopic column, return spring, positioning column and positioning hole, the function of positioning the wound winding drum is realized, ensuring the stability of the winding drum after winding the film, and avoiding the situation that the winding drum rotates due to pulling during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall structural schematic diagram of the utility model;

[0016] Figure 2 is the structural schematic diagram of the bidirectional screw rod of the utility model;

[0017] Figure 3 is the sectional structural schematic diagram of the winding drum of the utility model;

[0018] Figure 4 is the structural schematic diagram of the positioning frame of the utility model;

[0019] Figure 5 This is a schematic cross-sectional structure diagram of the spring cylinder of the present utility model.

[0020] In the figure: 1, base; 2, control panel; 3, mounting bracket; 4, reel; 5, clamping plate; 6, anti-slip pad; 7, telescopic groove; 8, telescopic frame; 9, positioning notch; 10, ejecting spring; 11, positioning frame; 12, protrusion; 13, dial plate; 14, positioning spring; 15, movable frame; 16, bidirectional screw; 17, drive motor; 18, limiting rod; 19, connecting shaft; 20, spring cylinder; 21, telescopic column; 22, knob; 23, positioning column; 24, positioning hole; 25, return spring. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1-5 , the present utility model provides a technical solution for a device for testing the tensile strength and elongation rate of a film: including a base 1, a reel 4 and a clamping plate 5. Both sides of the two ends of the top of the base 1 are slidably connected with mounting brackets 3. The reels 4 are movably connected by a connecting shaft 19 between the mounting brackets 3 at the same end. A clamping plate 5 is arranged at the top of the reel 4. Both ends of the bottom of the clamping plate 5 are provided with telescopic frames 8. Telescopic grooves 7 are opened at both ends and inside the top of the reel 4. The telescopic frames 8 are placed inside the telescopic grooves 7 and are slidably connected with their inner walls. Positioning notches 9 are opened at both sides of the bottom end of the telescopic frame 8. A positioning frame 11 is horizontally slidably arranged at the bottom end inside the telescopic groove 7. Both ends of the inner side of the positioning frame 11 are provided with protrusions 12. One end of the positioning frame 11 is fixedly installed with a dial plate 13. The dial plate 13 extends to the outside of the bottom of the reel 4 and is slidably connected with it. A positioning spring 14 is arranged on the other side of the dial plate 13.

[0023] Specifically, a spring cylinder 20 is arranged at the end of the connecting shaft 19 at one end of the reel 4. A telescopic column 21 is slidably connected inside the end of the spring cylinder 20 far from the connecting shaft 19 through a provided limiting groove and a limiting block. A knob 22 is fixedly installed at the end of the telescopic column 21. A positioning column 23 is fixedly arranged on the outer periphery of one side of the knob 22. A positioning hole 24 is opened around the spring cylinder 20 on the outer ring of the bearing of the spring cylinder 20. A return spring 25 is arranged inside the spring cylinder 20. Both ends of the return spring 25 are fixedly connected to the telescopic column 21 and the spring cylinder 20 respectively.

[0024] Specifically, a top-out spring 10 is arranged inside the telescopic slot 7, and both ends of the top-out spring 10 are fixedly connected to the bottom of the telescopic frame 8 and the inner bottom surface of the telescopic slot 7 respectively.

[0025] Specifically, anti-slip pads 6 are provided on the top surfaces of both the top of the winding drum 4 and the top of the clamping plate 5, and the anti-slip pads 6 are fixedly connected to the winding drum 4 and the clamping plate 5 respectively by gluing.

[0026] Specifically, a sliding slot is provided on the top surface of the base 1, and a movable frame 15 is arranged inside the sliding slot. Both ends of the top of the movable frame 15 are fixedly connected to the bottoms of two mounting frames 3 located at the same end of the top of the base 1. The middle of the bottom end of the movable frame 15 is screwed with a bidirectional screw 16 through a threaded sleeve, and a driving motor 17 is arranged at one end of the bidirectional screw 16.

[0027] Specifically, two ends of the bottom of the movable frame 15 are slidably connected with limiting rods 18, and both ends of the limiting rods 18 are fixedly connected to the inside of the shell of the base 1 by welding.

[0028] Specifically, a control panel 2 is fixedly arranged on one side of the outside of the base 1, and the control panel 2 is fixedly installed on one side of the outside of the base 1 by embedding.

[0029] In this implementation, during use, both ends of the film are respectively clamped between the clamping plate 5 and the reel 4, and the anti-slip pad 6 plays a role in preventing slipping. By pressing down the clamping plate 5, it cooperates with the reel 4 to stably clamp the film. Then, the dial 13 is toggled so that the protrusion 12 in the positioning frame 11 aligns with the positioning notch 9, and the protrusion 12 passes through the positioning notch 9. Then, the dial 13 is released. Under the action of the positioning spring 14, the dial 13 is driven to reset, causing the protrusion 12 and the positioning notch 9 to form a dislocation, thereby achieving the purpose of positioning the telescopic frame 8 and the clamping plate 5. Then, the knob 22 is pulled outwards, causing the positioning post 23 to disengage from the positioning hole 24. By rotating the knob 22, the telescopic post 21 is driven to rotate. Since the telescopic post 21 is slidably connected to the inner wall of the spring cylinder 20 through the limiting groove and the limiting block, while the telescopic post 21 is telescoped, the telescopic post 21 can also drive the spring cylinder 20 to rotate synchronously. Together with the connecting shaft 19, the reel 4 is driven, thereby realizing the winding of the film around the outer periphery of the reel 4 and the clamping plate 5, achieving the purpose of fixing the film, greatly improving the clamping stability, and making the film taut, avoiding slack or slipping, which affects the accuracy of the test. After winding, the knob 22 is released. Under the action of the return spring 25, the positioning post 23 is inserted into the internal positioning hole 24 to achieve positioning. Finally, through the driving motor 17, the bidirectional screw 16 is driven to rotate, causing the movable frames 15 at both ends of the bidirectional screw 16 to drive the mounting frame 3 to move the inner structure in the reverse direction, thereby realizing the function of testing the tensile strength and elongation rate of the film, and using the rangefinder to monitor the moving distance of the mounting frame 3 to facilitate the visualization of the test results.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A film tensile strength and elongation testing device, comprising a base (1), a reel (4) and a clamping plate (5), characterized in that: Both sides of the top ends of the base (1) are slidably connected with mounting frames (3), and the mounting frames (3) at the same end are movably connected to the reel (4) through a connecting shaft (19). A clamping plate (5) is provided on the top of the reel (4), and telescopic frames (8) are provided at both ends of the bottom of the clamping plate (5). Telescopic grooves (7) are provided at both ends of the top and inside of the reel (4). The telescopic frame (8) is placed inside the telescopic groove (7) and slidably connected to the inner wall thereof. Positioning notches (9) are provided on both sides of the bottom end of the telescopic frame (8). A positioning frame (11) is slidably provided at the bottom end of the telescopic groove (7). Both ends of the inner side of the positioning frame (11) are provided with protrusions (12). A dial plate (13) is fixedly installed at one end of the positioning frame (11). The dial plate (13) extends to the outer side of the bottom of the reel (4) and is slidably connected to the reel, and a positioning spring (14) is provided on the other side of the dial plate (13).

2. A film tensile strength and elongation testing device according to claim 1, characterized in that: A spring barrel (20) is arranged at the end of the connecting shaft (19) at one end of the winding drum (4); a telescopic column (21) is slidably connected to the inside of the end of the spring barrel (20) away from the connecting shaft (19) through a limiting groove and a limiting block; a knob (22) is fixedly installed at the end of the telescopic column (21); a positioning column (23) is fixedly arranged on the outer periphery of one side of the knob (22); a positioning hole (24) is opened around the spring barrel (20) on one side of the outer ring of the external bearing of the spring barrel (20); a return spring (25) is arranged inside the spring barrel (20); and two ends of the return spring (25) are fixedly connected to the telescopic column (21) and the spring barrel (20) respectively.

3. A film tensile strength and elongation testing device according to claim 1, characterized in that: An ejection spring (10) is arranged inside the telescopic slot (7), and two ends of the ejection spring (10) are respectively fixedly connected to the bottom of the telescopic frame (8) and the inner bottom surface of the telescopic slot (7).

4. A film tensile strength and elongation testing device according to claim 1, characterized in that: The top surface of the reel (4) and the top surface of the clamping plate (5) are both provided with anti-skid pads (6), and the anti-skid pads (6) are fixedly connected to the reel (4) and the clamping plate (5) by gluing.

5. A film tensile strength and elongation testing device according to claim 1, characterized in that: A slide groove is provided on the top surface of the base (1), a movable frame (15) is arranged inside the slide groove, the top two ends of the movable frame (15) are respectively fixedly connected to the bottoms of two mounting frames (3) located at the same end of the top of the base (1), a bidirectional screw rod (16) is spirally connected to the middle part of the bottom end of the movable frame (15) through a threaded sleeve, and a driving motor (17) is arranged at one end of the bidirectional screw rod (16).

6. A film tensile strength and elongation testing device according to claim 5, characterized in that: The two ends of the bottom of the movable frame (15) are slidably connected to the limiting rod (18), and the two ends of the limiting rod (18) are fixedly connected to the inside of the shell of the base (1) by welding.

7. A film tensile strength and elongation testing device according to claim 1, characterized in that: A control panel (2) is fixedly arranged on one side of the exterior of the base (1); the control panel (2) is fixedly mounted on one side of the exterior of the base (1) by means of inlay.

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