Film stretcher for film production

Abstract

The utility model relates to the technical field of film production, and discloses a film stretcher for film production, which is characterized in that positioning rotating rods are rotatably connected to the inner walls of the two sides of the top of a rack, linkage rods are slidably sleeved on rod bodies of the positioning rotating rods, and guide rod frames are rotatably connected to the outer walls of the two sides of the extension end of each linkage rod; limiting rollers are rotationally connected to the inner walls of the two sides of the tail end of the middle of the rack, an expansion support is fixedly connected to the adjacent faces of the limiting rollers on the two sides, and transition rollers are rotationally connected to the inner walls of the two sides of the expansion support respectively. Through the arrangement of the guide rod frame, the limiting roller and the transition roller, the position of the guide rod frame is flexibly adjusted, the limiting roller rotates on the inner walls of the two sides of the tail end of the middle of the rack and is fixedly connected with the expansion support, transverse movement of a film is limited, and deviation is prevented; the transition rollers are installed on the inner walls of the two sides of the expansion support, the advancing direction of the thin film is changed, the thin film is stably transited to the winding link, the stability of the thin film in the winding process is further enhanced, smooth winding work is guaranteed, and the rejection rate is reduced.

Description

A film stretching machine for film production Technical Field

[0001] This utility model relates to the field of film production technology, specifically a film stretching machine for film production. Background Technology

[0002] Polypropylene film requires a stretching process during production to improve its physical stability, mechanical strength, airtightness, transparency, gloss, toughness, and wear resistance. However, traditional stretching devices are mostly complex in structure, extremely cumbersome to operate, and the stretching effect is not ideal. They are not only bulky, complex in structure, and expensive, but also waste a lot of film during the production process, have low reliability, and cannot meet the needs of continuous large-scale industrial production.

[0003] Application number CN201922122739.0 discloses a stretching mechanism for polypropylene film production, including a driving component. The driving component includes a vertical plate with a rectangular groove on both sides. A double-ended stud is rotatably connected inside the rectangular groove. The top of the double-ended stud is fixedly connected to the rotating end of a driving motor fixedly installed on the top of the vertical plate. The two ends of the double-ended stud are threadedly fitted with a first slider and a second slider, respectively. The side walls of the first slider and the second slider are fixedly provided with winding components, and a film is wound on the winding components. When the first slider and the second slider move away from each other, the winding components on the first slider and the second slider also move synchronously away from each other. During the process of moving away from each other, the distance between the first slider and the second slider increases, and the film is stretched. Compared with traditional devices, this device can stretch the film during the production process, and it has a simple structure, is convenient to operate, and is easy to learn.

[0004] This stretching structure cannot flexibly adjust the path of the film entering the winding area according to the film width and winding requirements. During the winding process, the film is prone to problems such as deviation and wrinkles. Moreover, when the stretched film enters the winding stage, it is difficult to effectively restrict the lateral movement of the film. The film is very prone to deviation, loosening or uneven tension, which will not only cause damage to the film surface, but may also cause winding interruption, equipment failure and other problems, increasing the scrap rate and equipment maintenance costs in the production process. Summary of the Invention

[0005] The purpose of this invention is to provide a film stretching machine for film production, which solves the problem of poor film transport stability.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a film stretching machine for film production, comprising a stretching assembly and a winding assembly. The winding assembly is installed at the tail end of the stretching assembly. The stretching assembly includes a frame. Positioning rods are rotatably connected to the inner walls on both sides of the top of the frame. A connecting rod is slidably sleeved on the rod body of the positioning rod. Guide rod frames are rotatably connected to the outer walls on both sides of the extension end of the connecting rod. Limiting rollers are rotatably connected to the inner walls on both sides of the tail end of the frame. An expansion bracket is fixedly connected to the adjacent side of the two limiting rollers. Transition rollers are rotatably connected to the inner walls on both sides of the expansion bracket.

[0008] The purpose of this setup is that, during machine operation, the roll of film to be stretched is mounted on the unwinding roller. By rotating the handwheel screw to adjust the guide sleeve and tension block, the film is positioned in a suitable initial position and tension state. Parameters such as stretching speed and tension are set in the control box. The motor is started to preheat the equipment. The motor then drives the unwinding roller to release the film. The film is guided and supported by the transmission roller, maintaining stable tension under the action of the tension block, and smoothly conveyed to the stretching area along the path guided by the guide sleeve. After entering the stretching area, the transmission roller shaft drives the stretching roller to rotate, applying tension to the film. The stretched film changes its direction of travel via the transition roller, maintaining a stable path under the action of the limit roller and the expansion bracket. The positioning rotating rod and the connecting rod adjust the film's direction of travel. The guide rods are positioned precisely to guide the film into the winding stage, completing the film winding process. The winding assembly is installed at the tail end of the stretching assembly, forming a continuous film processing path. The positioning rotating rods rotate on the inner walls of both sides of the top of the frame, and the connecting rods can slide on their bodies. Together, they can flexibly adjust the position of the guide rods according to the film width and winding requirements, thereby precisely guiding the film into the winding area. The limiting rollers rotate on the inner walls of both sides of the tail end in the middle of the frame and are fixedly connected to the expansion bracket, restricting the lateral movement of the film and preventing deviation. The transition rollers are installed on the inner walls of both sides of the expansion bracket, changing the direction of film travel and allowing it to smoothly transition to the winding stage, further enhancing the stability of the film during the winding process, ensuring the smooth progress of the winding work, and reducing the scrap rate.

[0009] Furthermore, a control box is fixedly installed on one outer wall of the frame, and a motor is fixedly installed on the inner bottom wall of the frame, with the output end of the motor installed inside the control box.

[0010] The purpose of this setup is that, during the operation of the machine, the operator can set parameters such as stretching speed and tension in the control box. The motor is installed on the inner wall of the bottom surface of the frame, and its output end extends into the control box. The motor operates according to the instructions of the control box, providing power to the entire stretching machine.

[0011] Furthermore, the frame is rotatably connected to the inner walls on both sides of the tail end of the positioning rotating rod, and the frame is rotatably connected to the inner walls on both sides below the unwinding roller, with the unwinding roller positioned between the positioning rotating rod and the transition roller.

[0012] The purpose of this setup is that, during machine operation, the unwinding rollers, mounted on the inner walls of both sides of the tail end of the positioning rotor on the frame, carry the roll of film to be stretched. Driven by the motor, the unwinding rollers release the film, which is then guided and supported by the drive rollers and smoothly conveyed to the stretching area. The drive rollers are located in front of and below the unwinding rollers to assist in film conveying and ensure stable film transfer before stretching.

[0013] Furthermore, transmission roller shafts are engaged in the grooves on both sides of the front end of the frame, and tension rollers are sleeved on the inner walls of the transmission roller shafts on both sides.

[0014] The purpose of this setup is that, during the machine's operation, the drive roller shaft is engaged in the grooves on both sides of the front end of the frame, the stretching roller is sleeved on the inner wall of the drive roller shaft, and the motor's power is transmitted to the drive roller shaft, driving the stretching roller to rotate and apply tension to the film, thereby achieving the film stretching process and changing the film's physical properties, such as thickness and strength.

[0015] Furthermore, guide bushings are rotatably connected to the inner walls of the top two sides of the frame, the guide bushings are located at the tail of the transmission roller shaft, and a handwheel screw is threadedly connected to the inner wall of the guide bushings.

[0016] The purpose of this setup is that, during machine operation, the guide sleeve is installed on the inner walls of both sides of the top of the frame, located at the tail of the drive roller shaft. The handwheel screw is threadedly connected to the guide sleeve. By rotating the handwheel screw, the operator can adjust the position of the guide sleeve, thereby adjusting the guiding path of the film and ensuring that the film accurately enters the stretching roller.

[0017] Furthermore, the handwheel screws on both sides are positioned opposite each other on both sides of the frame, and the handwheel screws on both sides extend forward through to the inner sides of the frame. Tensioning blocks are rotatably connected to the extended ends of the handwheel screws on both sides.

[0018] The purpose of this design is that, during machine operation, when the handwheel screw is turned, the tension block moves inside the frame to adjust the film tension. When the film is slack, the tension block moves to tighten the film; when the film is too tight, the tension block moves in the opposite direction to loosen the film, ensuring that the film maintains appropriate tension during the stretching process.

[0019] This utility model has the following beneficial effects:

[0020] (1) By setting up a guide rod frame, a limiting roller and a transition roller, the positioning rotating rod rotates on the inner walls of both sides of the top of the frame, and the connecting rod can slide on its body to flexibly adjust the position of the guide rod frame. The limiting roller rotates on the inner walls of both sides of the middle and rear ends of the frame and is fixedly connected to the expansion bracket to restrict the lateral movement of the film and prevent it from running off-center. The transition roller is installed on the inner walls of both sides of the expansion bracket to change the direction of film travel and make it smoothly transition to the winding stage, further enhancing the stability of the film during the winding process, ensuring the smooth progress of the winding work and reducing the scrap rate.

[0021] (2) With the setting of guide bushing, handwheel screw and tension block, the operator can adjust the position of guide bushing by turning the handwheel screw, thereby adjusting the guiding path of the film and ensuring that the film enters the stretching roller accurately. When the handwheel screw is turned, the tension block moves inside the frame and can adjust the tension of the film. When the film is loose, the tension block moves to tighten the film; when the film is too tight, the tension block moves in the opposite direction to relax the film, ensuring that the film maintains appropriate tension during the stretching process.

[0022] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.

[0024] Figure 1 is a schematic diagram of the main structure of this utility model;

[0025] Figure 2 is a schematic diagram of a portion of the tensile component of this utility model;

[0026] Figure 3 is a partial structural diagram of the stretching assembly and winding assembly of this utility model;

[0027] Figure 4 is a schematic diagram of the main structure of the winding assembly of this utility model;

[0028] The attached diagram lists the components represented by each number as follows:

[0029] In the diagram: 1. Tensioning assembly; 101. Frame; 102. Drive roller shaft; 103. Tensioning roller; 104. Guide bushing; 105. Handwheel screw; 106. Tensioning block; 107. Control box; 108. Motor; 109. Unwinding roller; 110. Drive roller; 2. Rewinding assembly; 201. Positioning rod; 202. Linkage rod; 203. Guide rod frame; 204. Limiting roller; 205. Expansion bracket; 206. Transition roller. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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 protection scope of the present utility model.

[0031] Please refer to Figures 1-4. This utility model is a film stretching machine for film production, including a stretching assembly 1 and a winding assembly 2. The winding assembly 2 is installed at the tail end of the stretching assembly 1. The stretching assembly 1 includes a frame 101. Positioning rotating rods 201 are rotatably connected to the inner walls on both sides of the top of the frame 101. A connecting rod 202 is slidably sleeved on the rod body of the positioning rotating rod 201. Guide rod frames 203 are rotatably connected to the outer walls on both sides of the extension end of the connecting rod 202. Limiting rollers 204 are rotatably connected to the inner walls on both sides of the tail end of the frame 101. An expansion bracket 205 is fixedly connected to the adjacent side of the two limiting rollers 204. Transition rollers 206 are rotatably connected to the inner walls on both sides of the expansion bracket 205.

[0032] The purpose of this setup is that, during machine operation, the roll of film to be stretched is mounted on the unwinding roller 109. By rotating the handwheel screw 105, the guide sleeve 104 and tension block 106 are adjusted to ensure the film is in a suitable initial position and tension. Parameters such as stretching speed and tension are set in the control box 107. The motor 108 is started to preheat the equipment. The motor 108 operates, driving the unwinding roller 109 to release the film. The film is guided and supported by the transmission roller 110, and maintains a stable tension under the action of the tension block 106. It is smoothly conveyed to the stretching area along the path guided by the guide sleeve 104. After entering the stretching area, the transmission roller shaft 102 drives the stretching roller 103 to rotate, applying tension to the film. The stretched film changes its direction of travel via the transition roller 206, and maintains a stable path under the action of the limit roller 204 and the expansion bracket 205. The film is then positioned by the positioning rod. The guide rod 201 and linkage rod 202 adjust the position of the guide rod frame 203, precisely guiding the film into the winding stage to complete the film winding work. The winding assembly 2 is installed at the tail end of the stretching assembly 1, forming a continuous film processing path. The positioning rotating rod 201 rotates on the inner walls of both sides of the top of the frame 101, and the linkage rod 202 can slide on its body. The two work together to flexibly adjust the position of the guide rod frame 202 according to the film width and winding requirements, thereby precisely guiding the film into the winding area. The limiting roller 204 rotates on the inner walls of both sides of the tail end of the middle of the frame 101 and is fixedly connected to the expansion bracket 205 to restrict the lateral movement of the film and prevent deviation. The transition roller 206 is installed on the inner walls of both sides of the expansion bracket 205 to change the direction of film travel, so that it smoothly transitions to the winding stage, further enhancing the stability of the film during the winding process, ensuring the smooth progress of the winding work, and reducing the scrap rate.

[0033] A control box 107 is fixedly installed on one outer wall of the frame 101, and a motor 108 is fixedly installed on the inner bottom wall of the frame 101. The output end of the motor 108 is installed inside the control box 107.

[0034] The purpose of this setup is that, during the operation of the machine, the operator can set parameters such as stretching speed and tension in the control box 107. The motor 108 is installed on the inner wall of the bottom surface of the frame 101, and its output end extends into the control box 107. The motor 108 operates according to the instructions of the control box 107, providing power for the entire stretching machine.

[0035] The frame 101 is rotatably connected to the inner walls on both sides of the tail end of the positioning rotating rod 201 with unwinding rollers 109. The frame 101 is rotatably connected to the inner walls on both sides below the unwinding rollers 109 with transmission rollers 110. The unwinding rollers 109 are located between the positioning rotating rod 201 and the transition rollers 206.

[0036] The purpose of this arrangement is that, during machine operation, the unwinding rollers 109 are mounted on the inner walls of both sides of the tail end of the positioning rotor 201 on the frame 101, carrying the roll of film to be stretched. Driven by the motor 108, the unwinding rollers 109 release the film, which is then guided and supported by the drive rollers 110 and smoothly conveyed to the stretching area. The drive rollers 110 are located in front of and below the unwinding rollers 109, assisting in film conveying and ensuring stable film transmission before stretching.

[0037] The front end of the frame 101 has two grooves on both sides where drive roller shafts 102 are engaged, and stretching rollers 103 are sleeved on the inner walls of the drive roller shafts 102 on both sides.

[0038] The purpose of this setup is that, during the operation of the machine, the transmission roller shaft 102 is engaged in the grooves on both sides of the front end of the frame 101, the stretching roller 103 is sleeved on the inner wall of the transmission roller shaft 102, the power of the motor 108 is transmitted to the transmission roller shaft 102, driving the stretching roller 103 to rotate, applying tension to the film, realizing the film stretching process, and changing the physical properties of the film, such as thickness and strength.

[0039] Guide bushings 104 are rotatably connected to the inner walls on both sides of the top of the frame 101. The guide bushings 104 are located at the tail of the transmission roller shaft 102. A handwheel screw 105 is threadedly connected to the inner wall of the guide bushings 104.

[0040] The purpose of this arrangement is that, during the operation of the machine, the guide sleeve 104 is installed on the inner walls of both sides of the top of the frame 101, located at the tail of the transmission roller shaft 102. The handwheel screw 105 is threadedly connected to the guide sleeve 104. By rotating the handwheel screw 105, the operator can adjust the position of the guide sleeve 104, thereby adjusting the guiding path of the film and ensuring that the film accurately enters the stretching roller 103.

[0041] Two handwheel screws 105 are positioned opposite each other on both sides of the frame 101. The two handwheel screws 105 extend forward through to both sides of the interior of the frame 101. Tensioning blocks 106 are rotatably connected to the extended ends of the two handwheel screws 105.

[0042] The purpose of this arrangement is that, during the operation of the machine, when the handwheel screw 105 is turned, the tension block 106 moves inside the frame 101 to adjust the tension of the film. When the film is slack, the tension block 106 moves to tighten the film; when the film is too tight, the tension block 106 moves in the opposite direction to relax the film, ensuring that the film maintains appropriate tension during the stretching process.

[0043] In use, during the operation of the machine, the roll of film to be stretched is installed on the unwinding roller 109. By turning the handwheel screw 105, the guide sleeve 104 and the tension block 106 are adjusted to make the film in a suitable initial position and tension state. The stretching speed, tension and other parameters are set in the control box 107. The motor 108 is started to preheat the equipment. The motor 108 runs and drives the unwinding roller 109 to release the film. The film is guided and supported by the transmission roller 110 and maintains a stable tension under the action of the tension block 106. It is smoothly conveyed to the stretching area along the path guided by the guide sleeve 104.

[0044] After the film enters the stretching area, the drive roller shaft 102 drives the stretching roller 103 to rotate, applying tension to the film. The stretched film changes its direction of travel through the transition roller 206. Under the action of the limiting roller 204 and the expansion bracket 205, it maintains a stable path. The position of the guide rod frame 203 is adjusted by the positioning rotating rod 201 and the connecting rod 202 to accurately guide the film into the winding stage, completing the film winding work.

[0045] The winding assembly 2 is installed at the tail end of the stretching assembly 1, forming a continuous film processing path. The positioning rotating rod 201 rotates on the inner walls of both sides of the top of the frame 101, and the connecting rod 202 can slide on its body. The two work together to flexibly adjust the position of the guide rod frame 202 according to the film width and winding requirements, thereby accurately guiding the film into the winding area. The limiting roller 204 rotates on the inner walls of both sides of the tail end of the middle of the frame 101 and is fixedly connected to the expansion bracket 205 to restrict the lateral movement of the film and prevent deviation. The transition roller 206 is installed on the inner walls of both sides of the expansion bracket 205 to change the direction of film travel, so that it smoothly transitions to the winding stage, further enhancing the stability of the film during the winding process, ensuring the smooth progress of the winding work, and reducing the scrap rate.

[0046] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A film stretching machine for film production, comprising a stretching assembly (1) and a winding assembly (2), characterized in that: The winding assembly (2) is installed at the tail end of the stretching assembly (1). The stretching assembly (1) includes a frame (101). A positioning rotating rod (201) is rotatably connected to the inner walls on both sides of the top of the frame (101). A connecting rod (202) is slidably sleeved on the rod body of the positioning rotating rod (201). A guide rod frame (203) is rotatably connected to the outer walls on both sides of the extension end of the connecting rod (202). A limiting roller (204) is rotatably connected to the inner walls on both sides of the middle tail end of the frame (101). An expansion bracket (205) is fixedly connected to the adjacent side of the two limiting rollers (204). A transition roller (206) is rotatably connected to the inner walls on both sides of the expansion bracket (205).

2. The film stretching machine for film production according to claim 1, characterized in that: A control box (107) is fixedly installed on one side of the outer wall of the frame (101), and a motor (108) is fixedly installed on the bottom inner wall of the frame (101). The output end of the motor (108) is installed inside the control box (107).

3. The film stretching machine for film production according to claim 1, characterized in that: The frame (101) is rotatably connected to the inner walls on both sides of the tail end of the positioning rotating rod (201) with unwinding rollers (109). The frame (101) is rotatably connected to the inner walls on both sides below the front of the unwinding rollers (109) with transmission rollers (110). The unwinding rollers (109) are located between the positioning rotating rod (201) and the transition rollers (206).

4. A film stretching machine for film production according to claim 1, characterized in that: The front end of the frame (101) has a drive roller shaft (102) engaged in the grooves on both sides, and a stretching roller (103) is sleeved on the inner wall of the drive roller shaft (102) on both sides.

5. A film stretching machine for film production according to claim 4, characterized in that: Guide bushings (104) are rotatably connected to the inner walls of the top two sides of the frame (101). The guide bushings (104) are located at the tail of the transmission roller shaft (102). A handwheel screw (105) is threadedly connected to the inner wall of the guide bushings (104).

6. A film stretching machine for film production according to claim 5, characterized in that: The two handwheel screws (105) are positioned opposite each other on both sides of the frame (101). The two handwheel screws (105) extend forward through to both sides of the interior of the frame (101). Tensioning blocks (106) are rotatably connected to the extended ends of the two handwheel screws (105).

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