A stretching device for facilitating the production of plastic film

Abstract

This utility model relates to the field of plastic film, specifically an extension device for plastic film production. It includes a base plate, with a first mounting plate and a second mounting plate fixedly connected to the top of the base plate. A first motor is fixedly connected to one side of the first mounting plate. This utility model, through a positioning mechanism, activates a second motor to rotate a gear, which in turn moves a positioning plate upwards. This upward movement of the positioning plate presses against the take-up roller, preventing material loosening due to the roller's rotation and ensuring the uniformity of subsequent film stretching. Activating a cylinder moves a second moving plate downwards to press the film. Then, activating a fourth motor rotates a second threaded rod, which in turn moves a second threaded sleeve and the first moving plate, thus stretching the film and improving its stretching stability. This solves the problem of low production efficiency in existing plastic film production extension devices.

Description

Technical Field

[0001] This utility model relates to the field of plastic film, specifically an extension device for facilitating the production of plastic film. Background Technology

[0002] Plastic film is a thin, soft, transparent or semi-transparent sheet material made from high molecular polymers through processes such as blow molding, casting, and calendering. It is widely used in packaging, agriculture, industry, construction and other fields, and is one of the essential materials in modern life. The stretching device used in plastic film production is a key piece of equipment used to improve the uniformity of film stretching, thickness accuracy and physical properties. Through the synergistic action of mechanical structure and control system, it realizes the intermittent lifting stretching, rolling stretching or oscillating rolling stretching of film, thereby avoiding excessive stretching or tearing.

[0003] Existing stretching devices for plastic film production have low production efficiency. First, they are not convenient for fixing the take-up rollers. After winding, the take-up rollers are prone to self-rotation, which can lead to misalignment, wrinkles, or loosening of the material. This not only affects the appearance quality of the film but may also cause difficulties in subsequent processing due to concentricity deviation of the roll. Second, they are not convenient for pressing and fixing the film during the stretching process. If the film is not pressed tightly during stretching, it will slide relative to the guide rollers, frame, and other components, resulting in friction scratches or surface wear. Insufficient pressing will also lead to uneven stress on the film during stretching, with some areas being overstretched while other areas are understretched, reducing production efficiency and increasing production costs. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology and solve the problem of low production efficiency of the existing extension device for plastic film production, this utility model proposes an extension device for plastic film production.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an extension device for easy plastic film production, including a base plate, a first mounting plate and a second mounting plate fixedly connected to the top of the base plate respectively, a first motor fixedly connected to one side of the first mounting plate, the output end of the first motor passing through the outside of the first mounting plate and fixedly connected to a rotating rod, one end of the rotating rod being rotatably connected to one side of the second mounting plate through a first bearing, a take-up roller fixedly sleeved on the surface of the rotating rod, a plurality of guide rollers being rotatably connected between the first mounting plate and the second mounting plate, the guide rollers being located on one side of the take-up roller, a positioning mechanism being provided at the bottom of the take-up roller, and a stretching assembly being provided at the top of the base plate;

[0006] The positioning mechanism includes a fixed base, the bottom of which is fixedly connected to the top of the base plate. A second motor is fixedly connected to one side of the fixed base, and the output end of the second motor passes through the inner cavity of the fixed base and is fixedly connected to a rotating rod.

[0007] Preferably, one end of the rotating rod is rotatably connected to the inner wall of the fixed seat via a second bearing, a gear is fixedly sleeved on the surface of the rotating rod, a toothed plate meshes with the surface of the gear, the top of the toothed plate extends through to the top of the fixed seat and is fixedly connected to a positioning plate, and the top of the positioning plate contacts the surface of the take-up roller.

[0008] Preferably, each of the four corners of the bottom of the positioning plate is fixedly connected to a telescopic rod, the bottom of the telescopic rod is fixedly connected to the top of the base plate, and a tension spring is sleeved on the surface of the telescopic rod, with the two ends of the tension spring being fixedly connected to the base plate and the positioning plate respectively.

[0009] Preferably, the tensioning assembly includes an adjusting box, the bottom of which is fixedly connected to the top of the base plate, and the two sides of which are fixedly connected to a first mounting plate and a second mounting plate, respectively. A third motor is fixedly connected to the inner wall of the adjusting box, and a first threaded rod is fixedly connected to the output ends of both sides of the third motor. The threads on the surfaces of the two first threaded rods are opposite, and the opposite ends of the two first threaded rods are rotatably connected to the inner wall of the adjusting box through a third bearing. A first threaded sleeve is threadedly connected to the surface of the first threaded rod, and an adjusting frame is rotatably connected to the top of the first threaded sleeve through a rotating shaft.

[0010] Preferably, the top of the adjustment box is provided with a lifting plate, one end of the adjustment frame passes through the adjustment box and is rotatably connected to the bottom of the lifting plate via a rotating shaft, the top of the lifting plate is provided with a fixing plate, the two sides of the fixing plate are respectively fixedly connected to a first mounting plate and a second mounting plate, the top of the adjustment box is fixedly connected with four sliding rods, the top of the sliding rods passes through to the top of the fixing plate, and a worktable is provided on one side of the adjustment box.

[0011] Preferably, mounting blocks are fixedly connected to the four corners of the bottom of the workbench, and the bottom of the mounting blocks is fixedly connected to the top of the base plate. A fourth motor is fixedly connected to one side of the workbench, and the output end of the fourth motor passes through the inner cavity of the workbench and is fixedly connected to a second threaded rod. One end of the second threaded rod is rotatably connected to the inner wall of the workbench through a fourth bearing, and a second threaded sleeve is threadedly connected to the surface of the second threaded rod.

[0012] Preferably, the top of the second threaded sleeve is fixedly connected to two movable blocks, the top of the movable blocks extends through to the top of the workbench, the top of the workbench is provided with a first movable plate, the bottom of the first movable plate is fixedly connected to the top of the movable blocks, cylinders are fixedly connected to both sides of the bottom of the first movable plate, a second movable plate is provided on the top of the first movable plate, and the output end of the cylinder extends through the first movable plate and is fixedly connected to the bottom of the second movable plate.

[0013] The advantages of this utility model are:

[0014] This invention, by setting up a positioning mechanism, activates a second motor to rotate a gear, which in turn moves a toothed plate and a positioning plate upwards. The upward movement of the positioning plate presses down on the take-up roller, preventing the material from loosening due to the take-up roller's rotation and ensuring the uniformity of subsequent film stretching. By setting up a stretching component, a cylinder is activated to move a second moving plate downwards, pressing the film. Subsequently, a fourth motor is activated to rotate a second threaded rod, which in turn moves a second threaded sleeve and a first moving plate, thus stretching the film and improving the stability of film stretching. This invention solves the problem of low production efficiency in existing stretching devices used for plastic film production. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0017] Figure 2 This is a schematic diagram of the positioning mechanism of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the adjusting box and guide roller of this utility model;

[0019] Figure 4 This is a cross-sectional view of the adjustment box of this utility model;

[0020] Figure 5 This is an exploded view of the cylinder and worktable of this utility model.

[0021] In the diagram: 1. Base plate; 2. First mounting plate; 3. Second mounting plate; 4. First motor; 5. Rotating rod; 6. Take-up roller; 7. Guide roller; 8. Positioning mechanism; 801. Fixed seat; 802. Second motor; 803. Rotating rod; 804. Gear; 805. Gear plate; 806. Positioning plate; 807. Telescopic rod; 808. Tension spring; 9. Tension assembly; 901. Adjusting box; 902. Third motor; 903. First threaded rod; 904. First threaded sleeve; 905. Adjusting frame; 906. Lifting plate; 907. Fixed plate; 908. Slide rod; 909. Worktable; 910. Mounting block; 911. Fourth motor; 912. Second threaded rod; 913. Second threaded sleeve; 914. Moving block; 915. First moving plate; 916. Cylinder; 917. Second moving plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0024] This application discloses an extension device for facilitating the production of plastic film. (Refer to...) Figures 1-5 An extension device for facilitating the production of plastic film includes a base plate 1. A first mounting plate 2 and a second mounting plate 3 are fixedly connected to the top of the base plate 1. A first motor 4 is fixedly connected to one side of the first mounting plate 2. The output end of the first motor 4 extends through to the outside of the first mounting plate 2 and is fixedly connected to a rotating rod 5. One end of the rotating rod 5 is rotatably connected to one side of the second mounting plate 3 through a first bearing. A take-up roller 6 is fixedly sleeved on the surface of the rotating rod 5. A plurality of guide rollers 7 are rotatably connected between the first mounting plate 2 and the second mounting plate 3. The guide rollers 7 are located on one side of the take-up roller 6. A positioning mechanism 8 is provided at the bottom of the take-up roller 6. A stretching assembly 9 is provided at the top of the base plate 1.

[0025] The positioning mechanism 8 includes a fixed base 801, the bottom of which is fixedly connected to the top of the base plate 1. A second motor 802 is fixedly connected to one side of the fixed base 801. The output end of the second motor 802 passes through the inner cavity of the fixed base 801 and is fixedly connected to a rotating rod 803. By setting the positioning mechanism 8, the second motor 802 is turned on to rotate the gear 804. The rotation of the gear 804 drives the toothed plate 805 and the positioning plate 806 to move upward. The upward movement of the positioning plate 806 can press the take-up roller 6, preventing the material from loosening due to the rotation of the take-up roller 6, and ensuring the uniformity of the subsequent film stretching. By setting the stretching component 9, the cylinder 916 is turned on to move the second moving plate 917 downward to press the film. Then, the fourth motor 911 is turned on to rotate the second threaded rod 912. The rotation of the second threaded rod 912 drives the second threaded sleeve 913 and the first moving plate 915 to move, which can stretch the film and improve the stability of film stretching.

[0026] Reference Figure 1 and Figure 2 One end of the rotating rod 803 is rotatably connected to the inner wall of the fixed base 801 via a second bearing. A gear 804 is fixedly sleeved on the surface of the rotating rod 803. A toothed plate 805 meshes with the surface of the gear 804. The top of the toothed plate 805 extends through to the top of the fixed base 801 and is fixedly connected to a positioning plate 806. The top of the positioning plate 806 contacts the surface of the take-up roller 6. By setting the second bearing, one end of the rotating rod 803 can be fixed, thereby enhancing the stability of the rotation of the rotating rod 803. By setting the positioning plate 806, the film on the take-up roller 6 can be positioned, thereby increasing the uniformity of film stretching.

[0027] Reference Figure 1 and Figure 2 Telescopic rods 807 are fixedly connected to the four corners of the bottom of the positioning plate 806. The bottom of the telescopic rods 807 is fixedly connected to the top of the base plate 1. A tension spring 808 is sleeved on the surface of the telescopic rods 807. The two ends of the tension spring 808 are fixedly connected to the base plate 1 and the positioning plate 806 respectively. By setting the telescopic rods 807, the movement range of the positioning plate 806 can be limited, preventing the positioning plate 806 from tilting and swaying during movement, thus improving the stability of the movement of the positioning plate 806. By setting the tension spring 808, the positioning plate 806 can be easily moved to reset.

[0028] Reference Figure 1 and Figure 4The tensioning assembly 9 includes an adjustment box 901. The bottom of the adjustment box 901 is fixedly connected to the top of the base plate 1. The two sides of the adjustment box 901 are fixedly connected to the first mounting plate 2 and the second mounting plate 3, respectively. A third motor 902 is fixedly connected to the inner wall of the adjustment box 901. The output ends of the third motor 902 on both sides are fixedly connected to the first threaded rods 903. The threads on the surfaces of the two first threaded rods 903 are opposite. The opposite ends of the two first threaded rods 903 are rotatably connected to the inner wall of the adjustment box 901 through a third bearing. A first threaded sleeve 904 is threadedly connected to the surface of the first threaded rod 903. The top of the first threaded sleeve 904 is rotatably connected to the adjustment frame 905 through a rotating shaft. By setting the third bearing, one end of the first threaded rod 903 can be fixed, improving the stability of the rotation of the first threaded rod 903. By setting the first threaded sleeve 904, one end of the adjustment frame 905 can be moved.

[0029] Reference Figure 1 , Figure 3 and Figure 4 The top of the adjusting box 901 is provided with a lifting plate 906. One end of the adjusting frame 905 passes through the adjusting box 901 and is rotatably connected to the bottom of the lifting plate 906 via a rotating shaft. The top of the lifting plate 906 is provided with a fixing plate 907. The two sides of the fixing plate 907 are fixedly connected to the first mounting plate 2 and the second mounting plate 3 respectively. The top of the adjusting box 901 is fixedly connected with four sliding rods 908. The top of the sliding rods 908 passes through to the top of the fixing plate 907. A worktable 909 is provided on one side of the adjusting box 901. By setting the lifting plate 906 and the fixing plate 907, the film can be pressed and fixed to avoid local tension differences and ensure uniform tension. By setting the sliding rods 908, the movement range of the lifting plate 906 can be limited to prevent the lifting plate 906 from tilting during movement and improve the stability of the movement of the lifting plate 906.

[0030] Reference Figure 1 and Figure 5 Mounting blocks 910 are fixedly connected to the four corners of the bottom of the workbench 909. The bottom of the mounting blocks 910 is fixedly connected to the top of the base plate 1. A fourth motor 911 is fixedly connected to one side of the workbench 909. The output end of the fourth motor 911 passes through the inner cavity of the workbench 909 and is fixedly connected to a second threaded rod 912. One end of the second threaded rod 912 is rotatably connected to the inner wall of the workbench 909 through a fourth bearing. A second threaded sleeve 913 is threadedly connected to the surface of the second threaded rod 912. By setting the mounting blocks 910, the workbench 909 can be supported, improving the stability of the workbench 909. By setting the fourth bearing, one end of the second threaded rod 912 can be fixed, improving the rotational stability of the second threaded rod 912.

[0031] Reference Figure 1 and Figure 5 Two movable blocks 914 are fixedly connected to the top of the second threaded sleeve 913. The top of the movable blocks 914 extends through to the top of the worktable 909. A first movable plate 915 is provided on the top of the worktable 909. The bottom of the first movable plate 915 is fixedly connected to the top of the movable blocks 914. Cylinders 916 are fixedly connected to both sides of the bottom of the first movable plate 915. A second movable plate 917 is provided on the top of the first movable plate 915. The output end of the cylinder 916 extends through the first movable plate 915 and is fixedly connected to the bottom of the second movable plate 917. By setting the movable blocks 914, the second threaded sleeve 913 can easily drive the first movable plate 915 to move. By setting the second movable plate 917, it can cooperate with the first movable plate 915 to stretch the film and improve the stability of the film stretching.

[0032] Working principle: When material needs to be wound up, the first motor 4 is turned on, causing the rotating rod 5 and the winding roller 6 to rotate. The rotation of the winding roller 6, in conjunction with the guide roller 7, allows one end of the film to move backward. When the film needs to be stretched, the second motor 802 is turned on, causing the rotating rod 803 and the gear 804 to rotate. The rotation of the gear 804 drives the toothed plate 805 and the positioning plate 806 to move upward. The upward movement of the positioning plate 806 positions the film surface on the winding roller 6, stopping the film from moving and ensuring the uniformity of subsequent film stretching. One end of the film moves from between the fixed plate 907 and the lifting plate 906 to the first moving plate 915 and the second moving plate. Between steps 917, the third motor 902 is activated to rotate the two first threaded rods 903. The rotation of the first threaded rods 903 drives the bottom of the two adjusting frames 905 to move, which in turn drives the top of the adjusting frames 905 to move. The top of the adjusting frames 905 moves the lifting plate 906 upward to press and fix the surface of the film. Then, the cylinder 916 is activated to move the second moving plate 917 downward to press one end of the film. The fourth motor 911 is activated to rotate the second threaded rod 912. The rotation of the second threaded rod 912 drives the second threaded sleeve 913, the moving block 914, and the first moving plate 915 to move, which can stretch the film and improve the stability of the film stretching.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A stretching device for facilitating the production of plastic film, comprising a base plate (1), characterised in that: The top of the base plate (1) is fixedly connected to a first mounting plate (2) and a second mounting plate (3). A first motor (4) is fixedly connected to one side of the first mounting plate (2). The output end of the first motor (4) extends through to the outside of the first mounting plate (2) and is fixedly connected to a rotating rod (5). One end of the rotating rod (5) is rotatably connected to one side of the second mounting plate (3) through a first bearing. A take-up roller (6) is fixedly sleeved on the surface of the rotating rod (5). A plurality of guide rollers (7) are rotatably connected between the first mounting plate (2) and the second mounting plate (3). The guide rollers (7) are located on one side of the take-up roller (6). A positioning mechanism (8) is provided at the bottom of the take-up roller (6). A tensioning assembly (9) is provided at the top of the base plate (1). The positioning mechanism (8) includes a fixed seat (801), the bottom of which is fixedly connected to the top of the base plate (1), and a second motor (802) is fixedly connected to one side of the fixed seat (801). The output end of the second motor (802) extends through the inner cavity of the fixed seat (801) and is fixedly connected to a rotating rod (803).

2. The stretching device for facilitating the production of plastic film according to claim 1, characterized in that: One end of the rotating rod (803) is rotatably connected to the inner wall of the fixed seat (801) via a second bearing. A gear (804) is fixedly sleeved on the surface of the rotating rod (803). A toothed plate (805) meshes with the surface of the gear (804). The top of the toothed plate (805) extends through to the top of the fixed seat (801) and is fixedly connected to a positioning plate (806). The top of the positioning plate (806) contacts the surface of the take-up roller (6).

3. The stretching device for facilitating plastic film production according to claim 2, characterized in that: Telescopic rods (807) are fixedly connected to the four corners of the bottom of the positioning plate (806). The bottom of the telescopic rods (807) is fixedly connected to the top of the base plate (1). A tension spring (808) is sleeved on the surface of the telescopic rods (807). The two ends of the tension spring (808) are fixedly connected to the base plate (1) and the positioning plate (806) respectively.

4. The stretching device for facilitating plastic film production according to claim 1, characterized in that: The tensioning assembly (9) includes an adjustment box (901). The bottom of the adjustment box (901) is fixedly connected to the top of the base plate (1). The two sides of the adjustment box (901) are fixedly connected to the first mounting plate (2) and the second mounting plate (3) respectively. A third motor (902) is fixedly connected to the inner wall of the adjustment box (901). The output ends of the third motor (902) on both sides are fixedly connected to the first threaded rods (903). The threads on the surfaces of the two first threaded rods (903) are opposite. The opposite ends of the two first threaded rods (903) are rotatably connected to the inner wall of the adjustment box (901) through a third bearing. The surface of the first threaded rod (903) is threadedly connected to the first threaded sleeve (904). The top of the first threaded sleeve (904) is rotatably connected to the adjustment frame (905) through a rotating shaft.

5. The stretching device for facilitating plastic film production according to claim 4, characterized in that: The top of the adjustment box (901) is provided with a lifting plate (906). One end of the adjustment frame (905) passes through the adjustment box (901) and is rotatably connected to the bottom of the lifting plate (906) via a rotating shaft. The top of the lifting plate (906) is provided with a fixing plate (907). The two sides of the fixing plate (907) are fixedly connected to the first mounting plate (2) and the second mounting plate (3) respectively. The top of the adjustment box (901) is fixedly connected with four sliding rods (908). The top of the sliding rods (908) passes through to the top of the fixing plate (907). A workbench (909) is provided on one side of the adjustment box (901).

6. The stretching device for facilitating plastic film production according to claim 5, characterized in that: Mounting blocks (910) are fixedly connected to the four corners of the bottom of the workbench (909). The bottom of the mounting blocks (910) is fixedly connected to the top of the base plate (1). A fourth motor (911) is fixedly connected to one side of the workbench (909). The output end of the fourth motor (911) passes through the inner cavity of the workbench (909) and is fixedly connected to a second threaded rod (912). One end of the second threaded rod (912) is rotatably connected to the inner wall of the workbench (909) through a fourth bearing. A second threaded sleeve (913) is threadedly connected to the surface of the second threaded rod (912).

7. The stretching device for facilitating plastic film production according to claim 6, characterized in that: The top of the second threaded sleeve (913) is fixedly connected to two moving blocks (914). The top of the moving blocks (914) extends through to the top of the workbench (909). The top of the workbench (909) is provided with a first moving plate (915). The bottom of the first moving plate (915) is fixedly connected to the top of the moving blocks (914). Cylinders (916) are fixedly connected to both sides of the bottom of the first moving plate (915). The top of the first moving plate (915) is provided with a second moving plate (917). The output end of the cylinder (916) extends through the first moving plate (915) and is fixedly connected to the bottom of the second moving plate (917).

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