BOPET film stretching equipment

Abstract

The utility model discloses BOPET (Biaxially Oriented Polyethylene Terephthalate) film stretching equipment, which belongs to the technical field of film processing, aims at solving the problem that the existing stretching equipment cannot reflect the proportional relation between tension and stretching distance, and comprises a working table, a plurality of supporting columns are fixedly connected to the bottom of the working table; two first fixing blocks are fixedly connected to the position, close to the front end, of the top of the workbench, two second fixing blocks are fixedly connected to the position, close to the rear end, of the top of the workbench, a guide rod is fixedly connected between the two first fixing blocks, and a two-way threaded rod is rotationally connected between the two second fixing blocks. According to the utility model, the elastic pull rope is matched with the tension sensor, so that the tension borne by the BOPET film can be reflected in real time, and meanwhile, under the matching of the scale marks, a worker can directly observe the stretched distance of the BOPET film, so that the proportional relation between the tension and the stretched distance can be conveniently calculated, and the mechanical property of the BOPET film can be accurately evaluated; and the production quality of products is seriously controlled.

Description

Technical Field

[0001] The utility model belongs to the technical field of film processing, and in particular relates to a BOPET film stretching device. Background Art

[0002] BOPET film is a biaxially oriented polyester film, which is made of polymer compounds of terephthalic acid and ethylene glycol, and is made through extrusion and stretching processes. BOPET film has high strength, excellent mechanical properties, excellent optical transparency and chemical stability, so it is widely used as packaging materials, protective films for car covers and other high-performance applications. During the processing of BOPET film, it is necessary to perform stretching testing to ensure the production quality of BOPET film.

[0003] A film biaxial stretching machine with patent announcement number CN215988821U in the prior art includes an operating table, a slide groove 1 is provided inside the operating table, a forward and reverse threaded rod is rotatably connected inside the slide groove 1, a driving motor is fixedly connected to the other end of the forward and reverse threaded rod, a movable plate is threadedly engaged on the outer side of the forward and reverse threaded rod, a slide plate is fixedly installed on the outer side of the movable plate, and the slide plate is inserted in a slide groove 2 provided on the upper surface of the operating table. The film of the device is on the outer side of the fixed shaft, and the rubber pad is driven to move by the extrusion ring, so that the film is in the middle of the fixed shaft and the extrusion ring, and then the driving motor is started, so that the movable plate is moved on the outer side of the forward and reverse threaded rod, and then the support plate drives the fixed shaft to move, so that the film is on a parallel plane for tensioning, so that the force is uniform; but in actual use, there are still the following deficiencies: from a practical point of view, the device cannot reflect the proportional relationship between the tension and the stretching distance of the film, so that the mechanical properties of the film cannot be accurately evaluated, which affects the control and guarantee of product quality.

[0004] Therefore, a BOPET film stretching device is needed to solve the problem that the stretching device in the prior art cannot reflect the proportional relationship between the pulling force and the stretching distance. Utility Model Content

[0005] The purpose of the utility model is to provide a BOPET film stretching device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a BOPET film stretching equipment comprises a workbench, a plurality of support columns are fixedly connected to the bottom of the workbench, two first fixed blocks are fixedly connected to the top of the workbench near the front end, and two second fixed blocks are fixedly connected to the top of the workbench near the rear end, a guide rod is fixedly connected between the two first fixed blocks, a bidirectional threaded rod is rotatably connected between the two second fixed blocks, two guide sleeves are slidably connected to the outer wall of the guide rod, and two ball nut seats are rotatably connected to the outer wall of the bidirectional threaded rod, a servo motor corresponding to the bidirectional threaded rod is installed on the outer side of one of the second fixed blocks, and an installation frame is fixedly connected between the corresponding guide sleeves and ball nut seats, a fixing mechanism is arranged on the top of the two installation frames, scale lines are arranged on the top of the workbench near the front and rear ends, an elastic pull rope is installed between the two installation frames, and tension sensors corresponding to the elastic pull rope are installed inside the two installation frames.

[0007] It should be noted in the solution that the bottoms of the plurality of support columns are fixedly connected with shock-absorbing sleeves.

[0008] It is further worth noting that the output end of the servo motor passes through the second fixing block and is fixedly connected to the bidirectional threaded rod.

[0009] It should be further explained that the two installation frames are at the same horizontal height.

[0010] As a preferred embodiment, the fixing mechanism includes a concave frame fixedly connected to the top of the mounting frame, the top of the concave frame is rotatably connected to a threaded column, the top of the threaded column is fixedly connected to a rotating plate, the bottom of the threaded column is installed with a rotating seat, the bottom of the rotating seat is fixedly connected to a splint, and the top of the splint is fixedly connected to two limit columns.

[0011] As a preferred implementation, a thread groove corresponding to the thread column and a through hole corresponding to the limiting column are formed on the top of the concave frame.

[0012] As a preferred implementation, an elastic anti-skid pad is fixedly connected to the bottom of the splint.

[0013] Compared with the prior art, the BOPET film stretching device provided by the utility model has at least the following beneficial effects:

[0014] (1) By setting up an elastic pull rope and a tension sensor, the tension on the BOPET film can be reflected in real time. At the same time, with the help of the scale line, the staff can directly observe the stretched distance of the BOPET film, which is convenient for calculating the proportional relationship between the tension and the stretching distance, thereby accurately evaluating the mechanical properties of the BOPET film and strictly controlling the production quality of the product.

[0015] (2) By setting up a fixing mechanism, the end of the BOPET film is placed on the inner wall of the concave frame, and then the rotating plate is rotated to drive the threaded column to rotate, so that the threaded column drives the clamping plate to descend to clamp and fix the BOPET film, ensuring that the film can be clamped evenly and stably during the tensile test, thereby ensuring the accuracy and repeatability of the test, and at the same time ensuring that the tensile force applied to the film during the test is evenly distributed. The uniform stress distribution can reduce the error in the test results and improve the reliability of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model from a first perspective;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle;

[0018] Figure 3 This is a schematic diagram of the structure of the utility model from a third viewing angle;

[0019] Figure 4 It is a structural schematic diagram of the fixing mechanism of the utility model.

[0020] In the figure: 1. workbench; 2. support column; 3. first fixed block; 4. second fixed block; 5. guide rod; 6. bidirectional threaded rod; 7. guide sleeve; 8. ball nut seat; 9. servo motor; 10. mounting frame; 11. fixing mechanism; 1101. concave frame; 1102. threaded column; 1103. rotating plate; 1104. rotating seat; 1105. clamping plate; 1106. limiting column; 12. scale line; 13. elastic pull rope; 14. tension sensor. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the embodiments.

[0022] See also Figure 1-4The utility model provides a BOPET film stretching device, including a workbench 1, a plurality of support columns 2 are fixedly connected to the bottom of the workbench 1, two first fixed blocks 3 are fixedly connected to the top of the workbench 1 near the front end, two second fixed blocks 4 are fixedly connected to the top of the workbench 1 near the rear end, a guide rod 5 is fixedly connected between the two first fixed blocks 3, a bidirectional threaded rod 6 is rotatably connected between the two second fixed blocks 4, two guide sleeves 7 are slidably connected to the outer wall of the guide rod 5, two ball nut seats 8 are rotatably connected to the outer wall of the bidirectional threaded rod 6, a servo motor 9 corresponding to the bidirectional threaded rod 6 is installed on the outer side of one of the second fixed blocks 4, a mounting frame 10 is fixedly connected between the corresponding guide sleeve 7 and the ball nut seat 8, a fixing mechanism 11 is arranged on the top of the two mounting frames 10, scale lines 12 are arranged on the top of the workbench 1 near the front and rear ends, an elastic pull rope 13 is installed between the two mounting frames 10, and tension sensors 14 corresponding to the elastic pull rope 13 are installed inside the two mounting frames 10.

[0023] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth mentioning that the bottom of multiple support columns 2 are fixedly connected with shock-absorbing sleeves, which can effectively reduce the interference caused by mechanical vibration or external vibration when the equipment is performing tensile testing, and help ensure the stability and accuracy of the testing equipment during the test. It is crucial for accurately measuring the mechanical properties of the film, such as strength, ductility and other parameters.

[0024] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth explaining in detail that the output end of the servo motor 9 passes through the second fixed block 4 and is fixedly connected to the bidirectional threaded rod 6, ensuring that the servo motor 9 can drive the bidirectional threaded rod 6 to rotate, so that the two ball nut seats 8 can move outward at the same time to perform a tensile test on the BOPET film.

[0025] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth mentioning that the two mounting frames 10 are at the same horizontal height, so that the BOPET film can remain horizontal during the test. When the film remains horizontal, the tension can be evenly distributed over the entire width of the film, ensuring that the force applied to the film during the tensile test can act evenly, thereby obtaining more accurate and reliable stress-strain curve data.

[0026] According to the above working process, it can be known that by setting the elastic pull rope 13 and the tension sensor 14 in coordination, the tension on the BOPET film can be reflected in real time. At the same time, with the cooperation of the scale line 12, the staff can directly observe the stretched distance of the BOPET film, which is convenient for calculating the proportional relationship between the tension and the stretching distance, thereby accurately evaluating the mechanical properties of the BOPET film and strictly controlling the production quality of the product.

[0027] Further as Figure 4 As shown, it is worth specifically explaining that the fixing mechanism 11 includes a concave frame 1101 fixedly connected to the top of the installation frame 10, the top of the concave frame 1101 is rotatably connected with a threaded column 1102, the top of the threaded column 1102 is fixedly connected with a rotating plate 1103, the bottom of the threaded column 1102 is installed with a rotating seat 1104, the bottom of the rotating seat 1104 is fixedly connected with a clamping plate 1105, and the top of the clamping plate 1105 is fixedly connected with two limiting columns 1106. By setting the fixing mechanism 11, the threaded column 1102 drives the clamping plate 1105 to descend to clamp and fix the BOPET film, ensuring that the film can be clamped evenly and stably during the tensile test, thereby ensuring the accuracy and repeatability of the test.

[0028] Further as Figure 4 As shown, it is worth explaining in detail that a thread groove corresponding to the threaded column 1102 and a through hole corresponding to the limiting column 1106 are provided on the top of the concave frame 1101. The thread groove and the threaded column 1102 cooperate with each other, so that the threaded column 1102 can be lifted and lowered while rotating, thereby providing a driving force for the lifting and lowering of the splint 1105. The through hole cooperates with the limiting column 1106 to limit and guide the displacement of the splint 1105, so that the lifting and lowering of the splint 1105 is more stable.

[0029] Further as Figure 4 As shown, it is worth mentioning that an elastic anti-skid pad is fixedly connected to the bottom of the splint 1105. The elastic anti-skid pad can effectively increase the friction between the contact surface of the splint 1105 and the BOPET film, which helps to prevent the splint 1105 from moving or sliding due to the tension of the film during the tensile test, thereby ensuring the stability and reliability of the test process.

[0030] This solution has the following working process: in actual use, the two ends of the BOPET film to be tested are respectively placed on the inner wall of the concave frame 1101, and then the rotating plate 1103 is rotated to drive the threaded column 1102 to rotate, so that the threaded column 1102 drives the clamping plate 1105 to descend to clamp and fix the BOPET film. After the fixation is completed, the servo motor 9 is turned on, and the servo motor 9 drives the bidirectional threaded rod 6 to rotate, so that the two ball nut seats 8 move outward at the same time to perform a tensile test on the BOPET film. The elastic pull rope 13 and the tension sensor 14 cooperate to reflect the tension of the BOPET film in real time. With the cooperation of the scale line 12, the staff observes the stretched distance of the BOPET film and calculates the proportional relationship between the tension and the stretching distance.

[0031] In summary: by setting the elastic pull rope 13 and the tension sensor 14 in coordination, the tension exerted on the BOPET film can be reflected in real time. At the same time, with the cooperation of the scale line 12, the staff can directly observe the stretched distance of the BOPET film, which is convenient for calculating the proportional relationship between the tension and the stretching distance, so as to accurately evaluate the mechanical properties of the BOPET film and seriously control the production quality of the product; by setting the fixing mechanism 11, the threaded column 1102 drives the clamping plate 1105 to descend to clamp and fix the BOPET film, ensuring that the film can be clamped evenly and stably during the tensile test, thereby ensuring the accuracy and repeatability of the test, and at the same time ensuring that the tension applied to the film during the test is evenly distributed. The uniform stress distribution can reduce the error in the test result and improve the reliability of the test data.

Claims

1. A BOPET film stretching device, comprising a workbench (1), characterized in that: The bottom of the workbench (1) is fixedly connected to a plurality of support columns (2); the top of the workbench (1) is fixedly connected to two first fixed blocks (3) near the front end; the top of the workbench (1) is fixedly connected to two second fixed blocks (4) near the rear end; a guide rod (5) is fixedly connected between the two first fixed blocks (3); a bidirectional threaded rod (6) is rotatably connected between the two second fixed blocks (4); the outer wall of the guide rod (5) is slidably connected to two guide sleeves (7); the outer wall of the bidirectional threaded rod (6) is rotatably connected to two ball nut seats (8); A servo motor (9) corresponding to the bidirectional threaded rod (6) is installed on the outer side of one of the second fixed blocks (4); a mounting frame (10) is fixedly connected between the corresponding guide sleeve (7) and the ball nut seat (8); a fixing mechanism (11) is arranged on the top of the two mounting frames (10); scale lines (12) are arranged on the top of the workbench (1) near the front and rear ends; an elastic pull rope (13) is installed between the two mounting frames (10); and a tension sensor (14) corresponding to the elastic pull rope (13) is installed inside the two mounting frames (10).

2. A BOPET film stretching device according to claim 1, characterized in that: The bottoms of the plurality of support columns (2) are all fixedly connected with shock-absorbing sleeves.

3. A BOPET film stretching device according to claim 1, characterized in that: The output end of the servo motor (9) passes through the second fixing block (4) and is fixedly connected to the bidirectional threaded rod (6).

4. A BOPET film stretching device according to claim 1, characterized in that: The two installation frames (10) are at the same level.

5. A BOPET film stretching device according to claim 1, characterized in that: The fixing mechanism (11) comprises a concave frame (1101) fixedly connected to the top of the installation frame (10); a threaded column (1102) is rotatably connected to the top of the concave frame (1101); a rotating plate (1103) is fixedly connected to the top of the threaded column (1102); a rotating seat (1104) is installed at the bottom of the threaded column (1102); a clamping plate (1105) is fixedly connected to the bottom of the rotating seat (1104); and two limiting columns (1106) are fixedly connected to the top of the clamping plate (1105).

6. A BOPET film stretching device according to claim 5, characterized in that: The top of the concave frame (1101) is provided with a thread groove corresponding to the thread column (1102) and a through hole corresponding to the limiting column (1106).

7. A BOPET film stretching device according to claim 5, characterized in that: An elastic anti-skid pad is fixedly connected to the bottom of the clamping plate (1105).

Images