A thin film tension testing mechanism

Abstract

This invention discloses a thin film tension testing mechanism, comprising a frame, a take-up roller, an unwind roller, a pressure roller assembly, and a pressure sensing roller. After being unwound by the unwind roller, the thin film is sequentially wound around a pressure sensing roller on one side, the pressure roller assembly, and a pressure sensing roller on the other side before being connected to the take-up roller. The pressure roller assembly includes a hollow, rotatable wheel and a support shaft fixed to the frame. The wheel is rotatably mounted on the support shaft. A mounting bracket is fixedly installed on the support shaft, and at least one non-contact sensor is mounted on the mounting bracket. A detection window is provided on the circumferential wall of the wheel, through which the detection end of the non-contact sensor points towards the thin film. The rotatable wheel and the support shaft fixed to the frame ensure smooth rotation and transmission of the thin film, enabling successful acquisition of dynamic response data of the film thickness under stress, providing reliable experimental data for material research.

Description

Technical Field

[0001] This utility model particularly relates to a thin film tension testing mechanism. Background Technology

[0002] In industries such as film manufacturing, packaging, and composite materials, the mechanical properties of rolled films are key indicators determining product quality and application reliability. Tensile strength (reflected by tension testing) and thickness uniformity are the two most critical parameters. Current technology typically employs two independent testing devices: a tensile testing machine or a dedicated film tensile testing machine to evaluate the tension-deformation relationship, while a micrometer or offline thickness gauge is used for sampling and thickness measurement. However, this separate testing approach has the following problems: it cannot reflect the real-time thickness changes of the film under actual tensile stress. Under tension, films undergo elastic or plastic thinning; this dynamic response in thickness is valuable data for studying key material properties, a process that offline measurement cannot capture. Summary of the Invention

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a thin film tension testing mechanism.

[0004] To solve the aforementioned technical problems, this utility model adopts the following technical solution:

[0005] A thin film tension testing mechanism includes a frame, with a take-up roller and an unwind roller respectively disposed at both ends of the frame. A pressure roller assembly is disposed between the take-up roller and the unwind roller. Pressure sensing rollers for detecting film tension are disposed on the left and right sides of the pressure roller assembly. After being unwound by the unwind roller, the film is sequentially wound around the pressure sensing roller on one side, the pressure roller assembly, and the pressure sensing roller on the other side before being connected to the take-up roller. The pressure roller assembly includes a hollow, rotatable wheel body and a support shaft fixed to the frame. The wheel body is rotatably mounted on the support shaft. A mounting bracket is fixedly disposed on the support shaft, and at least one non-contact sensor is disposed on the mounting bracket. A detection window is opened on the circumferential wall of the wheel body, and the detection end of the non-contact sensor points to the film through the detection window.

[0006] Preferably, the frame is provided with a base for fixing the support shaft.

[0007] Preferably, the support shaft is provided with a sensor mounting position, the mounting bracket is disposed on the sensor mounting position, the support shaft has a cable management channel opened along its axial direction inside, and the base has a power mounting part for fixing the external power interface. The cable of the non-contact sensor is led to the power mounting part through the cable management channel.

[0008] Preferably, the power supply mounting part is provided with an openable and closable protective cover.

[0009] Preferably, the main body of the wheel is made of metal, and a light-transmitting element made of optical glass or engineering plastic is embedded in the detection window.

[0010] Preferably, the sensor mounting position is a mounting groove formed on the outer surface of the support shaft.

[0011] The beneficial effects of this utility model are:

[0012] This invention features a rotatable wheel and a support shaft fixed to the frame. This structure ensures that the film can smoothly traction the wheel for rotation and transmission. At the same time, the mounting bracket fixed to the stationary support shaft ensures the spatial stability of the non-contact sensor. This design allows thickness measurement to be performed under the actual operating conditions of the film without interfering with tension testing. Through the testing mechanism of this application, dynamic response data of the film thickness under stress can be successfully obtained, providing reliable experimental data for materials research. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0014] Figure 1 This is a schematic diagram of the structure of a thin film tension testing mechanism according to this application;

[0015] Figure 2 This is a schematic diagram of the structure of the pressure roller assembly of this application. Figure 1 ;

[0016] Figure 3 This is a schematic diagram of the structure of the pressure roller assembly of this application. Figure 2 ;

[0017] Figure 4 This is a schematic diagram of the structure of the pressure roller assembly of this application. Figure 3 . Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0019] The orientation shown in the accompanying drawings should not be construed as limiting the specific protection scope of this utility model, but is only for reference and understanding of preferred embodiments. The product components shown in the drawings can be changed in position, increased in number, or simplified in structure.

[0020] The “connection” described in the specification and the “connection” relationship between the components shown in the accompanying drawings can be understood as a fixed connection, a detachable connection, or a connection that forms an integral unit; it can be a direct connection or a connection through an intermediate medium. Those skilled in the art can understand the connection relationship according to the specific circumstances and can derive different implementation methods such as screwing, riveting, welding, snap-fitting, or embedding to suitably replace the connection.

[0021] The directional terms such as up, down, left, right, top, and bottom mentioned in the instruction manual and the directions shown in the attached drawings indicate that the components can directly contact each other or contact each other through other features; for example, "up" can mean directly above or diagonally above, or it simply means above other objects; other directions can be understood by analogy.

[0022] The materials used to manufacture solid-shaped parts as shown in the specification and drawings may be metallic, non-metallic, or other synthetic materials. The machining processes used for solid-shaped parts may include stamping, forging, casting, wire cutting, laser cutting, injection molding, CNC milling, 3D printing, machining, etc. Those skilled in the art may adapt or combine the above materials and manufacturing processes according to different processing conditions, costs, and precision requirements.

[0023] A film tension testing mechanism includes a frame 1, with a take-up roller 2 and an unwind roller 3 respectively arranged at both ends of the frame 1. A pressure roller assembly is arranged between the take-up roller 2 and the unwind roller 3. Pressure sensing rollers 4 for detecting the tension of a film 1-1 are arranged on the left and right sides of the pressure roller assembly. After being unwound by the unwind roller 3, the film 1-1 is sequentially wound around the pressure sensing roller 4 on one side, the pressure roller assembly, and the pressure sensing roller 4 on the other side before being connected to the take-up roller 2. The pressure roller assembly includes a hollow, rotatable wheel body 5 and a support shaft 51 fixed to the frame 1. The wheel body 5 is rotatably fitted onto the support shaft 51. A mounting bracket 52 is fixedly arranged on the support shaft 51, and at least one non-contact sensor 53 is arranged on the mounting bracket 52. A detection window 54 is opened on the circumferential wall of the wheel body 5, and the detection end of the non-contact sensor 53 points to the film 1-1 through the detection window 54.

[0024] Furthermore, the frame 1 is provided with a base 6 for fixing the support shaft 51.

[0025] Furthermore, a sensor mounting position 7 is provided on the support shaft 51, and the mounting bracket 52 is provided on the sensor mounting position 7. A cable management channel 8 is provided inside the support shaft 51 along its axial direction. A power mounting part 9 for fixing an external power interface is provided on the base 6. The cable of the non-contact sensor 53 is led to the power mounting part 9 through the cable management channel 8.

[0026] Furthermore, the power supply mounting part 9 is provided with an openable and closable protective cover 10.

[0027] Furthermore, the main body of the wheel 5 is made of metal, and a light-transmitting element made of optical glass or engineering plastic is embedded in the detection window 54.

[0028] Furthermore, the sensor mounting position 7 is a mounting groove formed on the outer surface of the support shaft 51.

[0029] The working principle of this utility model is as follows:

[0030] The basic function of the film roll tensile testing machine described in this utility model is to measure the mechanical properties of the film roll during the stretching process. Specifically, the testing machine controls the speed difference or torque between the take-up roller 2 and the unwind roller 3 to subject the film 1-1 to a set tensile load.

[0031] During operation, the film 1-1, pulled by the take-up roller 2, starts from the unwind roller 3 and sequentially passes over the pressure sensing roller 4 on one side, the lower pressure roller assembly, and the pressure sensing roller 4 on the other side. Throughout this path, the film 1-1 is continuously tensioned, and its internal tension acts directly on the pressure sensing rollers 4 on both sides. According to mechanical principles, the tension of the film 1-1 generates a radial force perpendicular to the axis of the sensing roller it wraps around. The pressure sensing roller 4 detects this radial force through its integrated force-sensitive element, thereby measuring the tension of the film 1-1. It should be understood that the pressure sensing roller 4 measures tension by detecting the radial force caused by the tension of the film 1-1, which is a mature and widely used conventional technique in the relevant technical field. Therefore, the core innovation of this application and the following detailed description will focus on the improvement of the lower pressure roller assembly.

[0032] Based on this basic function, this application improves the pressure wheel assembly. Its working principle is as follows: a hollow cylindrical wheel 5 is rotatably mounted on a support shaft 51 via bearings. A rectangular detection window 54 is opened on the circumferential wall of the wheel 5. A support shaft 51, fixedly mounted on a base 6, has a cable management channel 8 axially opened inside. One end of the shaft has a power mounting part 9 for installing an external power quick-connect plug and is equipped with an openable protective cover 10 for protection. A mounting bracket 52 is installed in a mounting groove and fixed with screws to ensure it remains stationary during testing. As an embodiment 1, the non-contact sensor 53 of this application can be implemented using a laser thickness gauge, which is mounted on the mounting bracket 52. The detection end of the laser thickness gauge is aligned with the detection window 54 on the wheel 5. The cable of the non-contact sensor 53 is led out from the rear of the mounting bracket 52, orderly passed through the cable management channel 8 inside the support shaft 51, and finally connected to the interface of the power mounting part 9.

[0033] During the test, the take-up roller 2 is activated, pulling the film 1-1 to move. The tension of the film 1-1 is monitored in real time by two pressure sensing rollers 4. Simultaneously, the film 1-1 drives the wheel 5 of the lower pressure roller assembly to rotate, while the stationary laser thickness gauge continuously emits laser light, which penetrates the detection window 54 to illuminate the lower surface of the film 1-1, and receives the reflected light to obtain the thickness value.

[0034] Based on the above technical solution, the detection window 54 of this application is inlaid with a piece of light-transmitting optical glass as a light-transmitting element to protect the internal sensor from dust and friction damage, while ensuring efficient penetration of laser and light.

[0035] The rotatable wheel 5 and the support shaft 51 fixed to the frame 1 of this utility model ensure that the thin film 1-1 can smoothly pull the wheel 5 to rotate and transmit. At the same time, the mounting bracket 52 fixed to the stationary support shaft 51 ensures the stability of the non-contact sensor 53 in space. This design allows the thickness measurement to be carried out under the actual operating state of the thin film 1-1 without interfering with the tension test. Through the testing mechanism of this application, the dynamic response data of the thickness of the thin film 1-1 under stress can be successfully obtained, providing reliable experimental data for material research.

[0036] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the present invention without departing from the principles and spirit of the present invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for explanation only and not for limiting the present invention, but rather the scope of protection is defined by the content of the claims.

Claims

1. A film tension testing mechanism, comprising a frame (1), wherein a take-up roller (2) and an unwind roller (3) are respectively arranged at both ends of the frame (1), a pressure roller assembly is arranged between the take-up roller (2) and the unwind roller (3), and pressure sensing rollers (4) for detecting the tension of a film (1-1) are arranged on the left and right sides of the pressure roller assembly, wherein the film (1-1) is unwound by the unwind roller (3) and sequentially wound around the pressure sensing roller (4) on one side, the pressure roller assembly, and the pressure sensing roller (4) on the other side before being connected to the take-up roller (2); characterized in that: The pressure roller assembly includes a hollow, rotatable wheel body (5) and a support shaft (51) fixed on the frame (1). The wheel body (5) is rotatably fitted onto the support shaft (51). A mounting bracket (52) is fixedly provided on the support shaft (51), and at least one non-contact sensor (53) is provided on the mounting bracket (52). A detection window (54) is provided on the circumferential wall of the wheel body (5), and the detection end of the non-contact sensor (53) points to the thin film (1-1) through the detection window (54).

2. The thin film tension testing mechanism according to claim 1, characterized in that, The frame (1) is provided with a base (6) for fixing the support shaft (51).

3. The thin film tension testing mechanism according to claim 2, characterized in that, The support shaft (51) is provided with a sensor mounting position (7), the mounting bracket (52) is provided on the sensor mounting position (7), the support shaft (51) is provided with a cable management channel (8) along its axial direction, the base (6) is provided with a power mounting part (9) for fixing the external power interface, and the cable of the non-contact sensor (53) is led to the power mounting part (9) through the cable management channel (8).

4. A thin film tension testing mechanism according to claim 3, characterized in that, The power supply mounting part (9) is provided with an openable and closable protective cover (10).

5. A thin film tension testing mechanism according to claim 1, characterized in that, The main body of the wheel (5) is made of metal, and the detection window (54) is inlaid with a light-transmitting element made of optical glass or engineering plastic.

6. A thin film tension testing mechanism according to claim 5, characterized in that, The sensor mounting position (7) is a mounting groove formed on the outer surface of the support shaft (51).

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