Toughness detection device suitable for PET film

Abstract

The invention provides a toughness detection device suitable for a PET film, and relates to the field of material detection. Four corner stretching blocks are slidably connected to the end face of the top of the detection carrying table in an X shape, the bottoms of the corner stretching blocks are in threaded connection with control screws, four side stretching blocks are slidably connected to the end face of the top of the detection carrying table in a cross shape, and fixing pressing rods are slidably connected to the middles of the tops of the corner stretching blocks and the side stretching blocks. Fixing clamping plates are connected to the bottoms of the fixing pressing rods. By means of the four corner stretching blocks distributed in the X shape and the four side edge stretching blocks distributed in the cross shape, uniform stretching of the PET film in multiple directions is achieved, compared with traditional single-direction stretching detection, the design can simulate the situation of complex stress possibly borne by the PET film in actual use, then the toughness of the PET film can be accurately measured and calculated, and the method has the advantages of being high in practicability and high in practicability. The problems that only one-way stretching can be achieved, actual complex stress is difficult to simulate, and toughness cannot be comprehensively and accurately evaluated are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of material detection, and particularly relates to a toughness detection device suitable for PET films. Background Art

[0002] Due to its excellent physical properties, chemical stability and optical properties, PET films are widely used in many fields such as packaging, electronics, and optics. During the production and use of PET films, the toughness of PET films is crucial, which directly affects the forming quality of products during the processing. If the toughness is insufficient, PET films are difficult to withstand the external force extrusion during transportation and storage, and cannot effectively protect the contents, thus affecting the product quality and use effect. Therefore, the toughness detection of PET films is a necessary measure to ensure product quality, optimize production processes and improve user experience.

[0003] Based on the above, the existing toughness detection devices suitable for PET films have the following deficiencies: Most detection devices can only perform tensile tests on PET films in a single direction, and it is difficult to simulate the complex stress conditions that PET films may encounter in actual application scenarios, resulting in an inability to comprehensively and accurately evaluate the toughness of PET films, affecting the control of product quality. Moreover, during the detection of PET films, due to poor clamping effect, the PET film is prone to slipping during the stretching process, reducing the accuracy and reliability of the detection results. Summary of the Invention

[0004] The present invention relates to a toughness detection device suitable for PET films. By arranging eight stretching guide rails in a "rice" shape on the top of the detection stage, cooperating with four corner stretching blocks distributed in an "X" shape and four side stretching blocks distributed in a "cross" shape, uniform stretching of the PET film in multiple directions can be achieved. Compared with the traditional single-direction stretching test, this design can simulate the complex stress conditions that PET films may be subjected to in actual use. Combined with the scales on both sides of the top of the stretching guide rails, the moving distance of the stretching blocks can be accurately observed, and then the force limit of the PET film can be accurately calculated, more comprehensively and accurately detecting the toughness of the PET film and providing a reliable basis for product quality evaluation.

[0005] The present invention provides a toughness detection device suitable for PET films, which specifically includes: a detection stage; four corner stretching blocks are slidably connected in an "X" shape on the top end surface of the detection stage, and control screws are threadedly connected to the bottoms of the corner stretching blocks. Four side stretching blocks are slidably connected in a "cross" shape on the top end surface of the detection stage. A driving motor传动连接 with the control screws is provided on the detection stage. Fixed pressing rods are slidably connected to the middle of the tops of the corner stretching blocks and the side stretching blocks. Limiting elastic blocks slidably connected to the tops of the corner stretching blocks and the side stretching blocks are arranged outside the fixed pressing rods. Fixed clamping plates are connected to the bottoms of the fixed pressing rods.

[0006] Furthermore, the middle parts of the four side walls of the detection stage are hollow, and eight stretching guide rails are arranged in a "rice" shape on the top end face of the detection stage. Scales are fixedly installed on both sides of the top of the stretching guide rails. A regular octagonal central platform block is fixedly installed in the middle of the detection stage, and corner vertical rods are fixedly installed at the four corner ends of the detection stage.

[0007] Furthermore, four control screws are distributed in an "X" shape. The centrifugal ends of the control screws are rotationally connected to the corner vertical rods at the corners of the detection stage, and the centripetal ends of the control screws are rotationally connected to the side walls of the central platform block in the middle of the detection stage. Transmission bevel gears are fixedly connected to the centripetal ends of the four control screws, and the four transmission bevel gears mesh with each other.

[0008] Furthermore, rectangular fixing grooves are opened in the left and right side walls opposite to each other of the four corner stretching blocks. Three guide cylinders are arranged in sequence along the vertical direction at the bottom of the corner stretching blocks. The top guide cylinder is inclined and threadedly connected to the control screw, the middle guide cylinder is horizontally arranged, and the bottom guide cylinder is vertically arranged.

[0009] Furthermore, two groups of side stretching blocks are symmetrically arranged in the left-right and front-back shapes. Biting grooves are opened in the opposite side walls of each group of side stretching blocks. Sliding guide rods are symmetrically installed on the front and rear sides of the bottom of the left-right symmetric side stretching blocks, and the sliding guide rods are slidably connected to the guide cylinders at the bottom of the corner stretching blocks; sliding guide rods are symmetrically installed on the left and right sides of the bottom of the front-back symmetric side stretching blocks, and the sliding guide rods are slidably connected to the guide cylinders in the middle of the corner stretching blocks.

[0010] Furthermore, fixing clamping plates are slidably connected in the fixing grooves of the corner stretching blocks and the biting grooves of the side stretching blocks. A connecting seat that can be embedded into the inner top walls of the fixing grooves and the biting grooves is fixedly installed in the middle of the top of the fixing clamping plates.

[0011] Furthermore, a connecting head is fixedly connected to the bottom of the fixing pressure rod, and the connecting head is rotationally connected to the connecting seat of the fixing clamping plate. Limiting grooves are equidistantly opened on the side wall of the centrifugal side of the fixing pressure rod, and a limiting tooth groove is opened at the bottom of one side of the limiting groove.

[0012] Furthermore, the limiting elastic block is in a "T" shape. A limiting tooth convex is arranged at the bottom of the end of the limiting elastic block facing the fixing pressure rod, and the limiting tooth convex is clamped in the limiting tooth groove opened on the fixing pressure rod. A return spring is sleeved on the outer wall of the end of the limiting elastic block facing away from the fixing pressure rod.

[0013] The present invention provides a toughness detection device applicable to PET films, having the following beneficial effects: 1. The device realizes the uniform stretching of the PET film in multiple directions by opening eight stretching guide rails in a "rice" shape on the top of the detection stage, in cooperation with four corner stretching blocks distributed in an "X" shape and four side stretching blocks distributed in a "cross" shape. Compared with the traditional single-direction stretching detection, this design can simulate the complex stress conditions that the PET film may encounter in actual use. Combined with the scales on both sides of the top of the stretching guide rails, the moving distance of the stretching blocks can be accurately observed, and then the force limit of the PET film can be accurately measured, more comprehensively and accurately detecting the toughness of the PET film and providing a reliable basis for product quality evaluation.

[0014] 2. The fixing grooves of the corner stretching blocks and the engaging grooves of the side stretching blocks, together with the rectangular fixing clamp and the fixing pressure rod, can make the fixing clamp closely fit the PET film by pressing the fixing pressure rod, adapting to PET films of different thicknesses. And the rectangular fixing clamp forms a large frictional force with the bottom surface of the groove, effectively preventing the PET film from slipping during the stretching process. At the same time, the limiting grooves and limiting tooth grooves on the fixing pressure rod, in cooperation with the limiting tooth protrusions of the limiting elastic block and the return spring, can prevent the fixing pressure rod from accidentally loosening after clamping the PET film, ensuring that the PET film is always in a stable clamping state during the detection process. The return spring can also provide a buffering force to avoid damage to the PET film, ensuring the accuracy and reliability of the detection results.

[0015] 3. The control screws are distributed in an "X" shape and are meshed with each other through transmission bevel gears, enabling a single power source of the driving motor to drive multiple stretching blocks to move synchronously, simplifying the transmission structure, reducing the cost of the device, and improving the detection efficiency. The guiding cylinders at different directions at the bottom of the corner stretching blocks cooperate with the sliding guide rods at the bottom of the side stretching blocks, ensuring the accuracy of the movement of the stretching blocks, enhancing the overall structural strength and stability of the device, enabling it to withstand a large stretching force, not deforming or shaking during the detection process, effectively guaranteeing the reliability of the detection results, and also extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0017] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0018] In the drawings: Figure 1 is the axonometric structure schematic diagram of the PET film toughness detection device of the embodiment of the present invention.

[0019] Figure 2 is the side view structure schematic diagram of the PET film toughness detection device of the embodiment of the present invention.

[0020] Figure 3This is a schematic diagram of the testing platform structure of the PET film toughness testing device according to an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the linkage structure of the control screw, corner stretching block, and side stretching block of the PET film toughness testing device according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the testing platform of the PET film toughness testing device according to an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the meshing structure of two control screws in a PET film toughness testing device according to an embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the linkage structure of the corner stretching block and the side stretching block of the PET film toughness testing device according to an embodiment of the present invention.

[0025] Figure 8 This is a schematic diagram of the cross-sectional structure of the corner stretching block of the PET film toughness testing device according to an embodiment of the present invention.

[0026] Figure 9 This is an embodiment of the PET film toughness testing device of the present invention. Figure 8 A magnified structural diagram at point A.

[0027] List of reference numerals 1. Testing platform; 101. Tension guide rail; 102. Scale; 103. Central platform block; 104. Corner uprights; 2. Drive motor; 3. Control screw; 301. Transmission bevel gear; 4. Corner tension block; 401. Fixing groove; 402. Guide cylinder; 5. Side tension block; 501. Engaging groove; 502. Sliding guide rod; 6. Fixing clamp; 601. Connecting seat; 7. Fixing pressure rod; 701. Connecting head; 702. Limiting groove; 703. Limiting tooth groove; 8. Limiting spring block; 801. Limiting tooth protrusion; 802. Return spring. Detailed Implementation

[0028] To make the objectives, solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0029] Example 1: Please refer to Figures 1 to 8 As shown: The present invention provides a toughness detection device suitable for PET films, including a detection stage 1. Four corner stretching blocks 4 are slidably connected in an "X" shape on the top end surface of the detection stage 1. A control screw 3 is threadedly connected to the bottom of the corner stretching block 4. Four side stretching blocks 5 are slidably connected in a "cross" shape on the top end surface of the detection stage 1. A driving motor 2 is fixedly installed at the left rear corner of the detection stage 1. The driving end of the driving motor 2 is connected to the control screw 3. A fixed pressing rod 7 is slidably connected to the middle of the top of both the corner stretching block 4 and the side stretching block 5. A limiting elastic block 8 that is slidably connected to the top of the corner stretching block 4 and the side stretching block 5 is provided outside the fixed pressing rod 7. The bottom of the fixed pressing rod 7 is connected to a fixed clamping plate 6.

[0030] Among them, the middle parts of the four side walls of the detection stage 1 are hollow. Eight stretching guide rails 101 are provided in a "rice" shape on the top end surface of the detection stage 1. Scale rulers 102 are fixedly installed on both sides of the top of the stretching guide rail 101. A central table block 103 in the shape of a regular octagon is fixedly installed in the middle of the detection stage 1. Corner vertical rods 104 are fixedly installed at the four corners of the detection stage 1.

[0031] By adopting the above technical solution, eight stretching guide rails 101 are provided in a "rice" shape on the top end surface of the detection stage 1, so that the four corner stretching blocks 4 arranged in an "X" shape and the side stretching blocks 5 distributed in a "cross" shape are slidably connected in the stretching guide rails 101, forming a guiding effect on the corner stretching blocks 4 and the side stretching blocks 5, enabling the four corner stretching blocks 4 and the four side stretching blocks 5 to move synchronously towards or away from the center. Thus, the PET film can be uniformly stretched in multiple directions through the corner stretching blocks 4 and the side stretching blocks 5. At the same time, the scale rulers 102 on both sides of the top of the stretching guide rail 101 can facilitate the observation of the moving distance of the corner stretching blocks 4 and the side stretching blocks 5, so as to calculate the toughness of the PET film according to the moving distance of the corner stretching blocks 4 and the side stretching blocks 5, and simulate the complex stress conditions that the PET film may be subjected to during actual use. Compared with the traditional single-direction stretching detection, it can more comprehensively and accurately detect the toughness of the PET film.

[0032] Among them, a rectangular fixed clamping plate 6 is slidably connected in the fixed groove 401 of the corner stretching block 4 and the engaging groove 501 of the side stretching block 5. A connecting seat 601 that can be embedded into the inner top wall of the fixed groove 401 and the engaging groove 501 is fixedly installed in the middle of the top of the fixed clamping plate 6.

[0033] Among them, the bottom of the fixed pressing rod 7 is fixedly connected to a connecting head 701. The connecting head 701 is rotatably connected in the connecting seat 601 of the fixed clamping plate 6. Limiting grooves 702 are equidistantly opened on the side wall of the centrifugal side of the fixed pressing rod 7. A limiting tooth groove 703 is opened at the bottom of one side of the limiting groove �02.

[0034] The limiting spring block 8 is T-shaped. The bottom of the limiting spring block 8 facing the fixed pressure rod 7 is provided with a limiting tooth protrusion 801. The limiting tooth protrusion 801 is engaged in the limiting tooth groove 703 opened in the fixed pressure rod 7. A return spring 802 is sleeved on the outer wall of the end of the limiting spring block 8 facing away from the fixed pressure rod 7.

[0035] Using the above technical solution, the corners of the PET film to be tested are placed in the fixing grooves 401 of the corner stretching block 4, and then the fixing rod 7 is pressed down. The fixing rod 7 controls the fixing clamp 6 to approach the PET film in the fixing groove 401. This can accommodate PET films of different thicknesses. The rectangular fixing clamp 6 and the bottom surface of the fixing groove 401 can increase the friction between the clamp and the PET film, ensuring a good clamping effect and effectively preventing the PET film from slipping during the stretching process, thus ensuring the accuracy of the test results. Furthermore, the engagement grooves 501 of the side stretching block 5, the fixing clamp 6, and the fixing rod 7 work together to fix and stretch the middle of the four sides of the PET film, so as to ensure the accuracy of the test results. The ET film undergoes a comprehensive tensile test to fully assess its toughness in all directions. By creating a limiting groove 702 and a limiting tooth groove 703 on the fixed pressure rod 7, and cooperating with the limiting tooth protrusion 801 of the limiting spring block 8 and the return spring 802, when the fixed pressure rod 7 slides down to clamp the PET film, the limiting tooth protrusion 801 of the limiting spring block 8 will engage in the limiting tooth groove 703, preventing the fixed pressure rod 7 from accidentally loosening and ensuring that the PET film remains clamped throughout the entire testing process. At the same time, the return spring 802 provides a certain amount of buffering force to prevent damage to the PET film due to excessive clamping. After the test is completed, it is convenient for the operator to lift the fixed pressure rod 7 upward, improving the convenience and safety of the operation.

[0036] Among them, there are four control screws 3 distributed in an "X" shape. The centrifugal end of the control screw 3 is rotatably connected to the corner upright 104 at the corner of the detection platform 1, and the centripetal end of the control screw 3 is rotatably connected to the side wall of the central platform block 103 in the middle of the detection platform 1. The centripetal ends of the four control screws 3 are all fixedly connected to the transmission bevel gears 301, and the four transmission bevel gears 301 mesh with each other.

[0037] Among them, rectangular fixing grooves 401 are provided in the left and right side walls of the four corner stretching blocks 4. Three guide cylinders 402 are arranged in sequence along the vertical direction at the bottom of the corner stretching blocks 4. The top guide cylinder 402 is inclined and threaded to the control screw 3. The middle guide cylinder 402 is arranged horizontally and the bottom guide cylinder 402 is arranged vertically.

[0038] Among them, two sets of side stretching blocks 5 are symmetrically arranged in a left-right and front-back shape. Each set of side stretching blocks 5 has an engagement groove 501 in the opposite side wall. Sliding guide rods 502 are symmetrically installed on the front and back sides of the bottom of the left-right symmetrical side stretching blocks 5. The sliding guide rods 502 are slidably connected in the guide cylinder 402 at the bottom of the corner stretching block 4. Sliding guide rods 502 are symmetrically installed on the left and right sides of the bottom of the front-back symmetrical side stretching blocks 5. The sliding guide rods 502 are slidably connected in the guide cylinder 402 at the middle of the corner stretching block 4.

[0039] By adopting the above technical solution, the control screws 3 are distributed in an "X" shape, with their centrifugal ends rotatably connected to the corner uprights 104 and their centripetal ends rotatably connected to the side wall of the central platform 103. They are meshed with each other through the transmission bevel gears 301, ensuring the synchronicity and stability of the four corner stretching blocks 4 during movement. This structural design allows the drive motor 2 to drive multiple stretching blocks with only one power source, simplifying the transmission structure, reducing the cost of the device, and improving the reliability and detection efficiency of the device. By setting guide cylinders 402 in different directions at the bottom of the corner stretching blocks 4, and the sliding guide rods 502 at the bottom of the side stretching blocks 5 cooperating with the guide cylinders 402, the side stretching blocks 5 can slide along the preset direction on the detection platform 1 under the drive of the corner stretching blocks 4. This structural design not only ensures the accuracy of the stretching block movement, but also enhances the overall structural strength and stability of the device, enabling it to withstand large tensile forces and ensuring that the device will not deform or shake during the detection process, thereby ensuring the reliability of the detection results.

[0040] The specific usage and function of this embodiment: In this invention, firstly, the four corners and the middle of the sides of a flat, wrinkle-free PET film are placed in the fixing groove 401 of the corner stretching block 4 and the engagement groove 501 of the side stretching block 5. Then, the fixing rod 7 is pressed down. When the fixing rod 7 slides down to clamp the PET film, the limiting tooth protrusion 801 of the limiting spring block 8 will engage in the limiting tooth groove 703 to prevent the fixing rod 7 from loosening accidentally, ensuring that the PET film is always clamped throughout the entire testing process. Then, the drive motor 2 drives the control screw 3 to rotate. The control screw 3 controls the four corner stretching blocks 4 to move synchronously through the meshing of the radial end transmission bevel gear 301. At the same time, guide cylinders 402 with different directions are set at the bottom of the corner stretching block 4, and the sliding guide rod 502 at the bottom of the side stretching block 5 cooperates with the guide cylinders 402, so that the side stretching block 5 can slide on the detection stage 1 along the preset direction under the drive of the corner stretching block 4, so that the PET film can be uniformly stretched in multiple directions by the corner stretching block 4 and the side stretching block 5. At the same time, the scales 102 on both sides of the top of the stretching guide rail 101 can easily observe the moving distance of the corner stretching block 4 and the side stretching block 5, so as to calculate the toughness of the PET film based on the moving distance of the corner stretching block 4 and the side stretching block 5, and simulate the complex stress conditions that the PET film may be subjected to in actual use.

[0041] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention, which is determined by the appended claims.

Claims

1. A device for testing the toughness of PET films, characterized in that, It includes a detection stage (1); four corner stretching blocks (4) are slidably connected in an "X" shape on the top end surface of the detection stage (1). A control screw rod (3) is threadedly connected to the bottom of the corner stretching block (4). Four side stretching blocks (5) are slidably connected in a "cross" shape on the top end surface of the detection stage (1). A driving motor (2)传动连接 with the control screw rod (3) is provided on the detection stage (1). A fixed pressing rod (7) is slidably connected to the middle of the top of both the corner stretching block (4) and the side stretching block (5). A limiting elastic block (8) slidably connected to the top of the corner stretching block (4) and the side stretching block (5) is provided on the outer side of the fixed pressing rod (7). A fixed clamping plate (6) is connected to the bottom of the fixed pressing rod (7).

2. The toughness testing device for PET film as described in claim 1, characterized in that, The middle parts of the four side walls of the detection stage (1) are hollow. Eight stretching guide rails (101) are arranged in a "rice" shape on the top end surface of the detection stage (1). Scales (102) are fixedly installed on both sides of the top of the stretching guide rail (101). A regular octagon-shaped central stage block (103) is fixedly installed in the middle of the detection stage (1). Corner vertical rods (104) are fixedly installed at the four corners of the detection stage (1).

3. The toughness testing device for PET films as described in claim 2, characterized in that, Four control screw rods (3) are distributed in an "X" shape. The centrifugal end of the control screw rod (3) is rotationally connected to the corner vertical rod (104) at the corner of the detection stage (1), and the centripetal end of the control screw rod (3) is rotationally connected to the side wall of the central stage block (103) in the middle of the detection stage (1). Transmission bevel gears (301) are fixedly connected to the centripetal ends of the four control screw rods (3), and the four transmission bevel gears (301) mesh with each other.

4. The toughness testing device for PET film as described in claim 1, characterized in that, Rectangular fixing grooves (401) are opened in the opposite left and right side walls of the four corner stretching blocks (4). Three guide cylinders (402) are arranged in sequence along the vertical direction at the bottom of the corner stretching block (4). The top guide cylinder (402) is inclined and threadedly connected to the control screw rod (3). The middle guide cylinder (402) is horizontally arranged, and the bottom guide cylinder (402) is vertically arranged.

5. The toughness testing device for PET film as described in claim 4, characterized in that, Two groups of side stretching blocks (5) are symmetrically arranged in the left-right and front-back shapes. Biting grooves (501) are opened in the opposite side walls of each group of side stretching blocks (5). Sliding guide rods (502) are symmetrically installed on the front and back sides of the bottom of the left and right symmetric side stretching blocks (5), and the sliding guide rods (502) are slidably connected to the guide cylinders (402) at the bottom of the corner stretching block (4). Sliding guide rods (502) are symmetrically installed on the left and right sides of the bottom of the front and back symmetric side stretching blocks (5), and the sliding guide rods (502) are slidably connected to the guide cylinders (402) in the middle of the corner stretching block (4).

6. The toughness testing device for PET films as described in claim 5, characterized in that, Fixed clamping plates (6) are slidably connected in the fixing grooves (401) of the corner stretching blocks (4) and the biting grooves (501) of the side stretching blocks (5). A connecting seat (601) that can be embedded into the inner top walls of the fixing grooves (401) and the biting grooves (501) is fixedly installed in the middle of the top of the fixed clamping plate (6). It should be noted that there is an unclear expression "传动连接" in the original text, which is tentatively translated as "传动连接", and it may need to be further determined according to the actual situation.

7. The toughness testing device for PET film as described in claim 6, characterized in that, The bottom of the fixed pressure rod (7) is fixedly connected to a connector (701), which is rotatably connected to the connector seat (601) of the fixed clamp (6). Limiting grooves (702) are opened at equal intervals on the side wall of the centrifugal side of the fixed pressure rod (7), and limiting tooth grooves (703) are opened on the bottom of one side of the limiting groove (702).

8. The toughness testing device for PET films as described in claim 1, characterized in that, The limiting spring block (8) is in the shape of "T". The bottom of the limiting spring block (8) facing the fixed pressure rod (7) is provided with a limiting tooth protrusion (801). The limiting tooth protrusion (801) is engaged in the limiting tooth groove (703) opened in the fixed pressure rod (7). A reset spring (802) is sleeved on the outer wall of the end of the limiting spring block (8) facing away from the fixed pressure rod (7).

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