Stretching device for PET film production

Abstract

The utility model discloses a stretching device for PET (polyethylene terephthalate) film production, which comprises a bottom plate, a heating device, a stretching mechanism and a cooling device, four corners of the lower surface of the bottom plate are fixedly connected with supporting legs, and the left side of the top of the bottom plate is fixedly connected with the heating device. Through the cooperative use of the bottom plate, the heating device, the stretching mechanism, the cooling device, the connecting frame, the supporting legs, the fixing plate, the rotating rod, the rotating shaft, the screw rod, the first belt wheel, the motor frame, the motor, the second belt wheel, the sliding groove, the limiting plate, the connecting block, the spring, the limiting rod, the through hole, the pulling handle and the pulling ring, the problems that a tension control system of traditional stretching equipment is relatively simple; in the prior art, tension control is not accurate when a thin film is stretched due to manual adjustment, in addition, a traditional device is fixed in material guiding and poor in flexibility of adapting to materials with different widths, when the materials with different specifications are treated, shutdown adjustment or component replacement is needed, and the conversion time is increased.

Description

Technical Field

[0001] This utility model belongs to the technical field of PET film production equipment, and in particular relates to a stretching device for PET film production. Background Technology

[0002] PET film, or polyethylene terephthalate film, is a high-performance film material made of PET plastic. Produced through extrusion or stretching processes, it possesses excellent mechanical strength, thermal stability, transparency, and barrier properties, making it suitable for a wide range of applications. In the packaging industry, PET film is used for protective packaging of food and pharmaceuticals; in the electronics industry, it serves as an insulating material and a substrate for flexible circuit boards; furthermore, it is used in labeling, printing, and optical films. Its lightweight, durable, and recyclable characteristics meet environmental protection requirements, making it an indispensable part of modern industry.

[0003] The problem with existing technology is that the tension control system of traditional stretching equipment is relatively simple and often relies on manual adjustment. This leads to inaccurate tension control during film stretching, which can easily cause breakage or uneven thickness. In addition, since the material guide of traditional equipment is fixed, its flexibility in adapting to materials of different widths is poor. When processing materials of different specifications, it is necessary to stop the machine for adjustment or replacement of parts, which not only increases the changeover time but also increases the cost. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a stretching device for PET film production, which has the advantages of precise tension control and material guidance. It solves the problem that the tension control system of traditional stretching equipment is relatively simple and often relies on manual adjustment, which leads to inaccurate tension control during film stretching and problems such as breakage or uneven thickness. In addition, since the material guidance of traditional equipment is fixed, its flexibility in adapting to materials of different widths is poor. When processing materials of different specifications, it is necessary to stop the machine for adjustment or replacement of parts, which not only increases the changeover time but also increases the cost.

[0005] This utility model is implemented as follows: a stretching device for PET film production includes a base plate, a heating device, a stretching mechanism, and a cooling device. Support legs are fixedly connected to the four corners of the lower surface of the base plate. A heating device is fixedly connected to the left side of the top of the base plate. A stretching mechanism is fixedly connected to the middle of the upper surface of the base plate. A cooling device is fixedly connected to the right side of the upper surface of the base plate. A connecting frame is placed on the top of the base plate. The bottom of the connecting frame on both the front and rear sides extends through and out of the bottom of the base plate. The connecting frame is slidably connected to the surface of the base plate.

[0006] In a preferred embodiment of this invention, a fixing plate is placed on the top of the connecting frame, and both the front and rear sides of the fixing plate are fixedly connected to the surface of the connecting frame. A rotating rod is placed on the top of the fixing plate, and both the front and rear sides of the rotating rod are rotatably connected to the surface of the connecting frame. A rotating shaft is rotatably connected to the top of the bottom plate, and a screw is fixedly connected to the bottom of the fixing plate. The screw is threadedly connected to the middle of the rotating shaft, and the bottom end of the screw is fixedly connected to the bottom of the connecting frame. By setting the screw and the rotating shaft, the tension can be precisely controlled before the film enters the cooling device, ensuring the stability of the stretching process and the consistency of product quality.

[0007] In a preferred embodiment of this invention, a first pulley is fixedly connected to the bottom of the rotating shaft, and a belt is sleeved onto the surface of the first pulley. A motor frame is fixedly connected to the bottom of the base plate, and a motor is fixedly connected to the bottom of the motor frame. A second pulley is fixedly connected to the output end of the motor, and the belt is sleeved onto the surface of the second pulley. The top of the second pulley is rotatably connected to the bottom of the base plate. By setting up the motor, the first pulley, and the second pulley, the height of the rotating rod can be automatically and precisely adjusted, significantly improving the convenience of operation and production efficiency.

[0008] As a preferred embodiment of this utility model, the top left and right sides of the fixed plate are provided with sliding grooves, and the front and rear sides of the top of the fixed plate are provided with limiting plates. The bottom left and right sides of the limiting plates are slidably connected to the sliding grooves. The limiting plates are inclined at a certain angle on the side closest to each other. By setting the limiting plates, the edge of the film can be stably clamped and accurately guided, ensuring the positional stability and tension uniformity during the stretching process.

[0009] In a preferred embodiment of this invention, a connecting block is fixedly connected to the middle of the upper surface of the limiting plate. Each connecting block has an internal cavity, and a spring is fixedly connected to the top of each cavity. A limiting rod is fixedly connected to the bottom of each spring. The top of each limiting rod penetrates and extends beyond the top of the connecting block, and the bottom of each limiting rod penetrates and extends beyond the surface of the limiting plate. A through hole is provided at the top of the connecting frame. The through hole cooperates with the limiting rod. By setting the connecting block and the limiting rod, the limiting plate can be quickly locked and unlocked, facilitating adjustment and operation.

[0010] As a preferred embodiment of this utility model, a number of through holes are provided and are evenly distributed on the top of the connecting frame. By providing a number of through holes, it can be used in conjunction with the limiting rod, providing multiple precise fixing options and enhancing the adaptability and flexibility of the equipment.

[0011] As a preferred embodiment of this utility model, each of the limiting plates is fixedly connected to a pull handle, and each of the limiting rods is rotatably connected to a pull ring. By setting the pull handle and pull ring, the convenience and user-friendly design of the operation can be significantly improved, making it easier and more intuitive to adjust the limiting plate and the limiting rod.

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

[0013] 1. This utility model solves the problem of the relatively simple tension control system of traditional stretching equipment, which often relies on manual adjustment, by setting up a base plate, heating device, stretching mechanism, cooling device, connecting frame, support leg, fixed plate, rotating rod, rotating shaft, screw, first pulley, belt, motor frame, motor, second pulley, slide groove, limiting plate, connecting block, cavity, spring, limiting rod, through hole, pull handle and pull ring in cooperation. This leads to inaccurate tension control during film stretching, which can easily cause breakage or uneven thickness. In addition, because the material guide of traditional equipment is fixed, its flexibility in adapting to materials of different widths is poor. When processing materials of different specifications, it is necessary to stop the machine for adjustment or replacement of parts, which not only increases the changeover time but also increases the cost.

[0014] 2. By setting up a pull handle and a pull ring, this utility model can significantly improve the convenience and user-friendly design of operation, making it easier and more intuitive to adjust the limit plate and limit rod. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the stretching device from a first-view perspective, provided by an embodiment of this utility model;

[0016] Figure 2 This is a three-dimensional structural schematic diagram of the stretching device from a second perspective according to an embodiment of the present invention;

[0017] Figure 3 This is a partial three-dimensional structural schematic diagram of the stretching device from a first perspective according to an embodiment of the present invention;

[0018] Figure 4 This is a partial three-dimensional structural schematic diagram of the stretching device provided in the second perspective of this utility model embodiment.

[0019] In the diagram: 1. Base plate; 2. Heating device; 3. Tensioning mechanism; 4. Cooling device; 5. Connecting frame; 6. Support leg; 7. Fixing plate; 8. Rotating rod; 9. Rotating shaft; 10. Screw; 11. First pulley; 12. Belt; 13. Motor frame; 14. Motor; 15. Second pulley; 16. Slide groove; 17. Limiting plate; 18. Connecting block; 19. Cavity; 20. Spring; 21. Limiting rod; 22. Through hole; 23. Pull handle; 24. Pull ring. Detailed Implementation

[0020] To further understand the invention content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0021] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0022] like Figures 1 to 4 As shown in the figure, the present invention provides a stretching device for PET film production, including a base plate 1, a heating device 2, a stretching mechanism 3 and a cooling device 4. Support legs 6 are fixedly connected to the four corners of the lower surface of the base plate 1. The heating device 2 is fixedly connected to the left side of the top of the base plate 1. The stretching mechanism 3 is fixedly connected to the middle of the upper surface of the base plate 1. The cooling device 4 is fixedly connected to the right side of the upper surface of the base plate 1. A connecting frame 5 is placed on the top of the base plate 1. The bottom of the connecting frame 5 on both the front and rear sides penetrates and extends out of the bottom of the base plate 1. The connecting frame 5 is slidably connected to the surface of the base plate 1.

[0023] refer to Figure 3 A fixing plate 7 is placed on the top of the connecting frame 5. The front and rear sides of the fixing plate 7 are fixedly connected to the surface of the connecting frame 5. A rotating rod 8 is placed on the top of the fixing plate 7. The front and rear sides of the rotating rod 8 are rotatably connected to the surface of the connecting frame 5. A rotating shaft 9 is rotatably connected to the top of the base plate 1. A screw 10 is fixedly connected to the bottom of the fixing plate 7. The screw 10 is threadedly connected to the middle of the rotating shaft 9. The bottom end of the screw 10 is fixedly connected to the bottom of the connecting frame 5.

[0024] By adopting the above solution, the tension can be precisely controlled before the film enters the cooling device by setting the screw 10 and the rotating shaft 9, ensuring the stability of the stretching process and the consistency of product quality.

[0025] refer to Figure 2 and Figure 3 A first pulley 11 is fixedly connected to the bottom of the rotating shaft 9. A belt 12 is connected to the surface of the first pulley 11 by a sleeve. A motor frame 13 is fixedly connected to the bottom of the base plate 1. A motor 14 is fixedly connected to the bottom of the motor frame 13. A second pulley 15 is fixedly connected to the output end of the motor 14. The belt 12 is connected to the surface of the second pulley 15 by a sleeve. The top of the second pulley 15 is rotatably connected to the bottom of the base plate 1.

[0026] By adopting the above solution, by setting up a motor 14, a first pulley 11 and a second pulley 15, the height of the rotating rod 8 can be automatically and precisely adjusted, which significantly improves the convenience of operation and production efficiency.

[0027] refer to Figure 3 and Figure 4The top left and right sides of the fixed plate 7 are provided with sliding grooves 16, and the front and rear sides of the top of the fixed plate 7 are provided with limiting plates 17. The bottom left and right sides of the limiting plates 17 are slidably connected to the inside of the sliding grooves 16, and the limiting plates 17 are inclined at a certain angle on the side closest to each other.

[0028] By adopting the above solution, by setting the limiting plate 17, it is possible to achieve stable clamping and precise guidance of the film edge, thus ensuring positional stability and tension uniformity during the stretching process.

[0029] refer to Figure 4 A connecting block 18 is fixedly connected to the middle of the upper surface of the limiting plate 17. A cavity 19 is opened inside the connecting block 18. A spring 20 is fixedly connected to the top of the cavity 19. A limiting rod 21 is fixedly connected to the bottom of the spring 20. The top of the limiting rod 21 passes through and extends out of the top of the connecting block 18. The bottom of the limiting rod 21 passes through and extends out of the surface of the limiting plate 17. A through hole 22 is opened at the top of the connecting frame 5. The through hole 22 and the limiting rod 21 are used in conjunction.

[0030] By adopting the above solution, the connecting block 18 and the limiting rod 21 can be set to enable the quick locking and unlocking of the limiting plate 17, which is convenient for adjustment and operation.

[0031] refer to Figure 4 A number of through holes 22 are provided and are evenly distributed on the top of the connecting frame 5.

[0032] By adopting the above solution, a number of through holes 22 can be set to cooperate with the limiting rod 21, providing multiple precise fixing options and enhancing the adaptability and flexibility of the equipment.

[0033] refer to Figure 3 and Figure 4 Each of the limiting plates 17 has a pull handle 23 fixedly connected to its top, and each of the limiting rods 21 has a pull ring 24 rotatably connected to its top.

[0034] By adopting the above solution, the ease of operation and user-friendly design can be significantly improved by setting the pull handle 23 and pull ring 24, making it easier and more intuitive to adjust the limit plate 17 and limit rod 21.

[0035] The working principle of this utility model:

[0036] In use, first, the material is passed through the heating device 2 and the stretching mechanism 3. Then, the material passes through the top of the rotating rod 8, and finally through the cooling device 4. Next, the position of the limiting plate 17 is adjusted according to the width of the material. The limiting rod 21 is pulled upwards using the pull ring 24 to move it out of the through hole 22. Then, the limiting plate 17 is moved along the slide groove 16 using the pull handle 23. After moving it to the appropriate position, the pull ring 24 is released. At this time, the spring 20 returns to its original position, causing the limiting rod 21 to insert into the through hole 22, thus fixing the limiting plate 17. After the limiting plates 17 on both sides are adjusted, the various devices can be activated to stretch the material. If the material becomes too loose during the stretching process, it may adversely affect subsequent processing steps, reducing processing accuracy and efficiency. At this time, the motor 14 can be started. The motor 14 drives the second pulley 15 to rotate, the second pulley 15 drives the first pulley 11 to rotate, the first pulley 11 drives the rotating shaft 9 to rotate, and the rotating shaft 9 drives the screw 10 to rise and fall, thereby driving the connecting frame 5 and the rotating rod 8 to move. When the rotating rod 8 moves upward, it drives the material to move upward, effectively preventing the material from loosening during processing, ensuring that it always maintains appropriate tension, reducing problems and material waste caused by material loosening, and ensuring smooth production.

[0037] In summary, this stretching device for PET film production, through the coordinated use of a base plate 1, heating device 2, stretching mechanism 3, cooling device 4, connecting frame 5, support leg 6, fixing plate 7, rotating rod 8, rotating shaft 9, screw 10, first pulley 11, belt 12, motor frame 13, motor 14, second pulley 15, slide groove 16, limiting plate 17, connecting block 18, cavity 19, spring 20, limiting rod 21, through hole 22, pull handle 23, and pull ring 24, solves the problems of the relatively simple tension control system of traditional stretching equipment, which often relies on manual adjustment. This leads to inaccurate tension control during film stretching, easily resulting in breakage or uneven thickness. In addition, because the material guide of traditional equipment is fixed, its flexibility in adapting to materials of different widths is poor. When processing materials of different specifications, it is necessary to stop the machine for adjustment or replacement of parts, which not only increases the changeover time but also increases the cost.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stretching device for PET film production, comprising a base plate (1), a heating device (2), a stretching mechanism (3), and a cooling device (4), characterized in that: Support legs (6) are fixedly connected to the four corners of the lower surface of the base plate (1). A heating device (2) is fixedly connected to the left side of the top of the base plate (1). A tensioning mechanism (3) is fixedly connected to the middle of the upper surface of the base plate (1). A cooling device (4) is fixedly connected to the right side of the upper surface of the base plate (1). A connecting frame (5) is placed on the top of the base plate (1). The bottom of the front and rear sides of the connecting frame (5) extends through and out of the bottom of the base plate (1). The connecting frame (5) is slidably connected to the surface of the base plate (1).

2. The stretching device for PET film production as described in claim 1, characterized in that: A fixing plate (7) is placed on the top of the connecting frame (5). The front and rear sides of the fixing plate (7) are fixedly connected to the surface of the connecting frame (5). A rotating rod (8) is placed on the top of the fixing plate (7). The front and rear sides of the rotating rod (8) are rotatably connected to the surface of the connecting frame (5). A rotating shaft (9) is rotatably connected to the top of the bottom plate (1). A screw (10) is fixedly connected to the bottom of the fixing plate (7). The screw (10) is threadedly connected to the middle of the rotating shaft (9). The bottom end of the screw (10) is fixedly connected to the bottom of the connecting frame (5).

3. The stretching device for PET film production as described in claim 2, characterized in that: The bottom of the rotating shaft (9) is fixedly connected to a first pulley (11), and a belt (12) is sleeved on the surface of the first pulley (11). The bottom of the base plate (1) is fixedly connected to a motor frame (13), and the bottom of the motor frame (13) is fixedly connected to a motor (14). The output end of the motor (14) is fixedly connected to a second pulley (15). The belt (12) is sleeved on the surface of the second pulley (15), and the top of the second pulley (15) is rotatably connected to the bottom of the base plate (1).

4. The stretching device for PET film production as described in claim 2, characterized in that: The top left and right sides of the fixed plate (7) are provided with sliding grooves (16), and the front and rear sides of the top of the fixed plate (7) are provided with limiting plates (17). The bottom left and right sides of the limiting plates (17) are slidably connected to the sliding grooves (16), and the limiting plates (17) are inclined at a certain angle to each other on the side closest to each other.

5. The stretching apparatus for PET film production as described in claim 4, characterized in that: A connecting block (18) is fixedly connected to the middle of the upper surface of the limiting plate (17). A cavity (19) is opened inside the connecting block (18). A spring (20) is fixedly connected to the top of the cavity (19). A limiting rod (21) is fixedly connected to the bottom of the spring (20). The top of the limiting rod (21) penetrates through and extends out of the top of the connecting block (18). The bottom of the limiting rod (21) penetrates through and extends out of the surface of the limiting plate (17). A through hole (22) is opened at the top of the connecting frame (5). The through hole (22) and the limiting rod (21) are used in conjunction.

6. The stretching apparatus for PET film production as described in claim 5, characterized in that: The through holes (22) are provided in a certain number and are evenly distributed on the top of the connecting frame (5).

7. The stretching apparatus for PET film production as described in claim 5, characterized in that: The top of each limiting plate (17) is fixedly connected to a pull handle (23), and the top of each limiting rod (21) is rotatably connected to a pull ring (24).

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