A film tension regulator for food packaging processing

Abstract

The utility model belongs to film production technical field, concretely relates to a kind of film tension regulator for food packaging processing, including frame, and tension adjusting mechanism, hot complex mechanism etc..Tension adjusting mechanism contains linkage adjusting mechanism and at least two tension units, through the coordination of adjusting rod, connecting rod and elastic assembly, realize the accurate adjustment and buffer to film tension.Heat complex mechanism provides stable temperature and pressure for film complex through heating roller, heater and other components.In addition, it is also provided with film pressing mechanism, winding mechanism and other auxiliary components.The regulator solves the problem that film is prone to wrinkle and the surface flatness of complex film is poor during the complex process, effectively improves the processing quality of complex film.

Description

Technical Field

[0001] This utility model belongs to the field of film production technology, and specifically relates to a film tension regulator for food packaging processing. Background Technology

[0002] The lamination process of food packaging bags is a process in the food packaging processing industry in which two or more food-grade packaging film materials with different properties are laminated, pressed, or bonded together with adhesives under controlled tension conditions through specific roll unwinding mechanisms, film tension adjustment devices, composite roller groups, etc., to finally form a composite film with comprehensive properties, which is then used for subsequent processing into food packaging bags.

[0003] The core of this process is to precisely control the tension of each film layer to avoid wrinkles, overstretching, or misalignment, thereby achieving complementary properties of different materials. Currently used laminating machines often encounter the following problem in actual operation: insufficient tension during lamination not only easily leads to wrinkles, causing lamination failure and reducing work efficiency, but also results in a lack of smoothness on the laminated surface, thus affecting the final lamination quality. Utility Model Content

[0004] The present invention aims to provide a film tension regulator for food packaging processing to solve the problems of wrinkles and lack of surface smoothness in composite films during the lamination process.

[0005] To achieve the above objectives, the present invention provides a film tension regulator for food packaging processing, comprising a frame and: The tension adjustment mechanism includes a linkage adjustment mechanism and at least two tension units. Each tension unit includes a tension roller, with tension roller mounting seats and elastic components at both ends. The tension roller mounting seats are rotatably connected to the top of the elastic components and the tension roller. The bottom of the elastic components is connected to the frame. The linkage adjustment mechanism includes an adjustment rod and a connecting rod. The tension units are connected to each other through the connecting rod. The middle part of the adjustment rod is rotatably connected to the frame. One end of the adjustment rod is connected to the connecting rod. A pin is slidably connected to the end of the adjustment rod away from the connecting rod. The frame has several through holes that cooperate with the pins at the positions corresponding to the movement trajectory of the through holes on the adjustment rod. The thermal compounding mechanism includes a heating roller, a heater, a heating movable rod, a slide rod, and several spring rods. The heating movable rod is slidably connected to the frame, the heating roller is rotatably connected to the heating movable rod, the heater is connected to the heating roller through a heating tube, one end of the slide rod is fixedly connected to the heating movable rod, the end of the slide rod away from the heating movable rod is provided with a threaded section and is slidably connected to the frame, an adjusting nut is threaded onto the threaded section, and the end of the spring rod away from the heating movable rod is threadedly connected to the frame.

[0006] The working principle and beneficial effects of this solution are as follows: The tension roller of the tension unit is connected to the elastic component through the tension roller mounting base. The bottom end of the elastic component is fixed to the frame, providing elastic support for the tension roller. Multiple tension units are linked together by a connecting rod. The adjusting rod uses the rotational connection between its middle part and the frame as a fulcrum. When one end of the adjusting rod drives the connecting rod to swing, it can drive all tension units to rise and fall synchronously. After adjustment, the pin at the other end of the sliding adjusting rod is inserted into the corresponding through hole in the frame to fix the position of the adjusting rod, thereby locking the height of the tension roller. The elastic component can extend and retract during the raising and lowering of the tension roller to adapt to position changes. The heater supplies heat to the heating roller through the heating tube to ensure stable temperature during lamination. The heating movable rod is slidably connected to the frame, which can drive the heating roller to adjust its bonding position with the film. The sliding rod is used to fix the base height of the heating roller. The spring rod is used to apply elastic pressure to the heating movable rod, balancing the heating movable rod while ensuring that the heating roller is always in close contact with the film, ensuring uniform pressure during the lamination process.

[0007] The position of the tension unit can be flexibly adjusted by the cooperation of the adjusting rod and the pin, so as to achieve multi-level precise adjustment of tension and solve the problem of wrinkles caused by insufficient tension; the synchronous lifting and lowering of the elastic component and the tension roller ensures that the film is subjected to uniform force and reduces the deformation caused by local tension fluctuations. (2) The elastic pressure of the spring rod in the thermal lamination mechanism is combined with the stable heating of the heating roller, so that the film is heated and pressed evenly during lamination, which effectively improves the flatness of the laminated surface. (3) The tension adjustment mechanism and the thermal lamination mechanism work together to avoid film wrinkles before lamination by tension control, and ensure the surface quality after lamination by uniform heating and pressure. The dual effect significantly improves the processing quality of the laminated film.

[0008] Optionally, the adjusting rod has a groove at one end near the connecting rod, and a horizontal shaft is provided on the connecting rod. The horizontal shaft is slidably connected to the groove, and a limit block is detachably connected to the horizontal shaft. When the adjusting rod drives the connecting rod to swing, the horizontal shaft slides in the groove to compensate for the angle change between the connecting rod and the adjusting rod. The limit block can prevent the horizontal shaft from disengaging from the groove, ensuring connection stability.

[0009] Optionally, the connecting rod is provided with several through holes, and the horizontal shaft passes through the through holes and is detachably connected to the connecting rod.

[0010] Optionally, the adjusting rod has a U-shaped sliding shaft at one end near the connecting rod, and the connecting rod has a sliding groove. The U-shaped sliding shaft passes through the sliding groove and is slidably connected to the connecting rod. The cooperation between the sliding shaft and the through hole provides a stable sliding trajectory for the connecting rod, ensuring that the transmission between the adjusting rod and the connecting rod does not interfere.

[0011] Optionally, a handle is fixedly connected to the end of the adjusting rod away from the connecting rod, and the outer surface of the handle is provided with anti-slip texture.

[0012] Optionally, the elastic component includes a spring and a rocker arm. The rocker arm is formed by hinged ends of two rods. The rocker arm is hinged to the tension roller mounting base, and the end of the rocker arm away from the tension roller mounting base is hinged to the frame. The two ends of the spring are respectively fixedly connected between the mounting base hinge and the frame. The spring absorbs tension fluctuations by stretching or compressing. When the film tension changes, the rocker arm rotates around the hinge point, driving the tension roller to rise and fall to adjust the tension and adapt to the tension requirements of films of different thicknesses.

[0013] Optionally, the elastic component includes a spring and a telescopic rod, with the spring sleeved on the outside of the telescopic rod, one end of the telescopic rod hinged to the tension roller, and the end of the telescopic rod away from the tension roller fixedly connected to the frame.

[0014] Optionally, the frame is equipped with a film-pressing mechanism, which includes a guide roller, a pressure roller, a pressure-adjusting movable rod, and several spring rods. The pressure-adjusting movable rod is slidably connected to the frame, the guide roller is rotatably connected to the frame, the pressure roller is positioned directly above the guide roller and rotatably connected to the pressure-adjusting movable rod, and the end of the spring rod away from the pressure-adjusting movable rod is threadedly connected to the frame. The thermally laminated film is guided by the guide roller to the space between the pressure roller and the guide roller. The spring rods provide continuous pressure to the pressure roller through the pressure-adjusting movable rod, further eliminating air bubbles and wrinkles between the composite layers and improving the film bonding tightness. The threaded spring rods allow for flexible adjustment of the pressure.

[0015] Optionally, the frame is equipped with a winding mechanism, which includes a winding roller, a winding roller mounting base, and a drive motor. The winding roller mounting base is fixed to the frame, and the winding roller is detachably mounted on the winding roller mounting base, with the winding roller rotatably connected to the winding roller mounting base. The drive motor drives the winding roller to rotate via a belt. The drive motor drives the winding roller to rotate at a uniform speed through belt transmission, realizing the automatic winding of the composite film. The detachable winding roller facilitates quick roll replacement.

[0016] Optionally, the frame is provided with at least two conveyor rollers that cooperate with the tension unit, and the conveyor rollers are rotatably connected to the frame. Various films pass through several conveyor rollers respectively, forming a height difference with the subsequent tension unit, reducing initial wrinkles. At the same time, the conveyor rollers guide and position the film, ensuring the accuracy of subsequent tension adjustment. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of a film tension regulator for food packaging processing according to Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the tension adjustment mechanism of a film tension regulator for food packaging processing according to Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the tension adjustment mechanism of a film tension regulator for food packaging processing in Embodiment 2 of this utility model. Detailed Implementation

[0018] The following detailed description illustrates the specific implementation method: The markings in the accompanying drawings include: frame 1, first conveyor roller 11, second conveyor roller 12, tension adjustment mechanism 2, tension unit 21, first tension roller 211, second tension roller 212, spring 213, swing arm 214, telescopic rod 215, tension roller mounting base 216, linkage adjustment mechanism 22, adjustment rod 221, connecting rod 222, horizontal shaft 223, limit block 224, U-shaped sliding shaft 225, thermal bonding mechanism 3, heating roller 31, heater 32, heating movable rod 33, slide rod 34, adjusting nut 35, spring rod 36, film pressing mechanism 4, guide roller 41, pressure roller 42, pressure movable rod 43, winding mechanism 5, winding roller 51, winding roller mounting base 52, drive motor 53.

[0019] Example 1 This embodiment is basically as follows: Figure 1 , Figure 2 As shown: A film tension regulator for food packaging processing includes a frame, on which a first conveying roller, a second conveying roller, a tension adjustment mechanism, a thermal lamination mechanism, a film pressing mechanism, and a winding mechanism are rotatably connected in sequence.

[0020] A first conveyor roller and a second conveyor roller are rotatably connected to the frame, with the first conveyor roller higher than the second. A tension adjustment mechanism is installed behind the first and second conveyor rollers. This mechanism includes a linkage adjustment mechanism and two tension units, each consisting of a first tension roller and a second tension roller. The first tension roller is located diagonally above the second tension roller. Both the first and second tension rollers are mounted on their respective tension roller mounting seats and are rotatably connected to these seats. An elastic component is also hinged to the tension roller mounting seat, with the end of the elastic component away from the mounting seat hinged to the frame. Figure 2 As shown, in this embodiment, the elastic component includes a spring and a rocker arm. One rocker arm is formed by hinged ends of two rods. One end of the two symmetrical rocker arms is hinged to the tension roller mounting base, and the ends of the two rocker arms away from the tension roller mounting base are hinged to the frame. The spring is fixed on both sides of the tension roller. One type of film forms a height difference by passing through the first conveyor roller and the first tension roller, reducing initial wrinkles; another type of film forms a height difference by passing through the second conveyor roller and the second tension roller, reducing initial wrinkles; the two films are laminated in a thermal lamination mechanism.

[0021] The linkage adjustment mechanism includes an adjusting rod and a connecting rod. The first tension roller and the second tension roller are connected via the connecting rod. The middle part of the adjusting rod is rotatably connected to the frame. The end of the adjusting rod near the connecting rod has a groove. The connecting rod has a horizontal shaft and several through holes. The horizontal shaft passes through the through holes and is detachably connected to the connecting rod. The horizontal shaft is slidably connected to the groove. A limit block is detachably connected to the horizontal shaft. The adjusting rod drives the connecting rod to swing, causing the first tension roller and the second tension roller to rise and fall synchronously. The end of the adjusting rod away from the connecting rod is slidably connected to a pin. The frame has several through holes corresponding to the movement trajectory of the through holes on the adjusting rod, which cooperate with the pin. The first tension roller and the second tension roller are connected via the connecting rod and move synchronously. The adjusting rod, as a driving component, is rotatably connected to the frame in the middle to form a fulcrum. The end near the connecting rod is movably connected to the connecting rod via the horizontal shaft and the groove structure. The horizontal shaft passes through the through holes on the connecting rod, and its connection position can be detachably adjusted. It is also embedded in the groove of the adjusting rod, so it can slide along the groove with the adjusting rod and drive the connecting rod to move synchronously. When the adjusting rod rotates around the central fulcrum, it pushes or pulls the connecting rod to swing through the cooperation of the horizontal shaft and the slide groove, ultimately achieving the synchronous rise or fall of the first and second tension rollers. Once the tension rollers have reached the target position, the position of the adjusting rod can be fixed by inserting a pin on the sliding adjusting rod into a through hole on the frame that matches the pin, thus locking the height of the tension rollers. A detachable limiting block on the horizontal shaft limits its sliding range within the slide groove, preventing parts from disengaging. The synchronous rise and fall of the two tension units ensures uniform tension on the material, preventing uneven material stress, deviation, or tensile deformation caused by single-roller positional deviations. By changing the connection position of the horizontal shaft in the connecting rod through hole, the relative height of the two tension units can be adjusted to ensure equal tension in both units.

[0022] The frame is also equipped with a thermal lamination mechanism, which includes a heating roller, a heater, a heating movable rod, a slide bar, and spring bars. The heating movable rod is slidably connected to the frame, and the heating roller is rotatably connected to the heating movable rod. The heating movable rod can drive the heating roller to move along the frame, thereby adjusting the distance between the heating roller and the film. The heater is fixedly connected to the frame and is connected to the heating roller through a heating tube. The heat generated by the heater is transferred to the heating roller through the heating tube, maintaining a stable temperature for the heating roller and providing the thermal energy basis for film lamination. One end of the slide bar is fixedly connected to the heating movable rod, and the end of the slide bar away from the heating movable rod has a threaded section that is slidably connected to the frame. An adjusting nut is threaded onto the threaded section, and the slide bar provides rigid support for the heating movable rod. Two spring bars are located on both sides of the slide bar. The end of the spring bar away from the heating movable rod is threadedly connected to the frame, and the end of the spring bar near the heating movable rod abuts against the heating movable rod. The spring bars push the heating movable rod to make the heating roller fit tightly against the film, while simultaneously balancing the heating movable rod.

[0023] The frame is also equipped with a pressing mechanism, which includes a guide roller, a pressure roller, a pressure lever, and spring rods. The pressure lever is slidably connected to the frame, the guide roller is rotatably connected to the frame, the pressure roller is positioned directly above the guide roller and is rotatably connected to the pressure lever, and the end of the spring rod away from the pressure lever is threadedly connected to the frame. The guide roller is rotatably connected to the frame and serves as a reference support for material conveying, guiding the material through a preset path. The pressure roller is located directly above the guide roller, forming a vertical correspondence with it. When the material passes between the two rollers, it is subjected to pressure from the pressure roller. The pressure roller is rotatably connected to the pressure lever, which is slidably connected to the frame and can move vertically up and down, ensuring that the distance between the pressure roller and the guide roller can be flexibly adjusted. The two spring rods not only balance the pressure lever but also adjust the compression amount by rotating the spring rods, thereby changing the pressure on the pressure roller.

[0024] The frame is also equipped with a winding mechanism, which includes a winding roller, a winding roller mounting base, and a drive motor. The winding roller mounting base is fixed to the frame, and the winding roller is detachably mounted on the mounting base, with the winding roller and the mounting base rotatably connected. The drive motor drives the winding roller to rotate via a belt. The drive motor, as the power source, connects to the winding roller via belt drive. When the motor is running, the belt drives the winding roller to rotate around its own axis, using rotational force to wind the continuously conveyed material onto the surface of the winding roller. The winding roller is detachably mounted on the mounting base while maintaining a rotatable connection, ensuring that the winding roller can rotate freely to complete the winding action, and also facilitating the removal and replacement of a new winding roller after the material is fully wound.

[0025] Example 2 The difference between this embodiment and Embodiment 1 is that: Figure 3As shown, in the tension adjustment mechanism, the end of the adjusting rod near the connecting rod is provided with a U-shaped sliding shaft. The connecting rod has a sliding groove, through which the U-shaped sliding shaft slides and connects to the connecting rod. The end of the adjusting rod away from the connecting rod is fixedly connected to a handle, the outer surface of which has anti-slip texture. In this embodiment, the elastic component includes a spring and a telescopic rod. The spring is sleeved on the outside of the telescopic rod. One end of the telescopic rod is hinged to the tension roller, and the end of the telescopic rod away from the tension roller is fixedly connected to the frame. The sliding groove on the connecting rod provides a sliding path for the U-shaped sliding shaft. When the adjusting rod is operated by the handle at the other end, the U-shaped sliding shaft can slide along the sliding groove of the connecting rod. This sliding connection restricts the relative movement direction of the adjusting rod and the connecting rod, while allowing for flexible positional adaptation during adjustment, avoiding jamming or damage caused by rigid connection. The handle at the end of the adjusting rod provides a force application point for manual operation, easily driving the adjusting rod to move. Through the cooperation of the U-shaped sliding shaft and the connecting rod, the position and height of the tension roller are indirectly adjusted, achieving the initial setting of the material tension. The core function of the telescopic rod is to limit the deformation direction of the spring, prevent the spring from bending laterally, ensure that the spring only stretches and contracts along the axial direction, and guarantee the stable output of elastic force. The spring absorbs tension impact through elastic deformation, preventing the material from being damaged due to sudden changes in tension.

[0026] The above are merely embodiments of this utility model. This utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solution are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are able to access all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims. The specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A film tension regulator for food packaging processing, characterized in that: Including racks; The tension adjustment mechanism includes a linkage adjustment mechanism and at least two tension units. Each tension unit includes a tension roller, with tension roller mounting seats and elastic components at both ends. The tension roller mounting seats are rotatably connected to the top of the elastic components and the tension roller. The bottom of the elastic components is connected to the frame. The linkage adjustment mechanism includes an adjustment rod and a connecting rod. The tension units are connected to each other through the connecting rod. The middle part of the adjustment rod is rotatably connected to the frame. One end of the adjustment rod is connected to the connecting rod. A pin is slidably connected to the end of the adjustment rod away from the connecting rod. The frame has several through holes that cooperate with the pins at the positions corresponding to the movement trajectory of the through holes on the adjustment rod. The thermal compounding mechanism includes a heating roller, a heater, a heating movable rod, a slide rod, and several spring rods. The heating movable rod is slidably connected to the frame, the heating roller is rotatably connected to the heating movable rod, the heater is connected to the heating roller through a heating tube, one end of the slide rod is fixedly connected to the heating movable rod, the end of the slide rod away from the heating movable rod is provided with a threaded section and is slidably connected to the frame, an adjusting nut is threaded onto the threaded section, and the end of the spring rod away from the heating movable rod is threadedly connected to the frame.

2. The film tension regulator for food packaging processing according to claim 1, characterized in that: The adjusting rod has a sliding groove at one end near the connecting rod, and a horizontal shaft is provided on the connecting rod. The horizontal shaft is slidably connected to the sliding groove, and a limit block is detachably connected to the horizontal shaft.

3. The film tension regulator for food packaging processing according to claim 2, characterized in that: The connecting rod has several through holes, and the horizontal shaft passes through the through holes and is detachably connected to the connecting rod.

4. The film tension regulator for food packaging processing according to claim 1, characterized in that: The adjusting rod is provided with a U-shaped sliding shaft at one end near the connecting rod, and the connecting rod is provided with a sliding groove, through which the U-shaped sliding shaft slides and connects with the connecting rod.

5. A film tension regulator for food packaging processing according to claim 1, characterized in that: The end of the adjusting rod away from the connecting rod is fixedly connected to a handle, and the outer surface of the handle is provided with anti-slip texture.

6. The film tension regulator for food packaging processing according to claim 1, characterized in that: The elastic component includes a spring and a rocker arm. The rocker arm is formed by hinged one end of two rods. The rocker arm is hinged to the tension roller mounting base. The end of the rocker arm away from the tension roller mounting base is hinged to the frame. The two ends of the spring are respectively fixedly connected between the mounting base and the frame.

7. A film tension regulator for food packaging processing according to claim 1, characterized in that: The elastic component includes a spring and a telescopic rod. The spring is sleeved on the outside of the telescopic rod. One end of the telescopic rod is hinged to the tension roller, and the end of the telescopic rod away from the tension roller is fixedly connected to the frame.

8. A film tension regulator for food packaging processing according to claim 1, characterized in that: The frame is equipped with a film pressing mechanism, which includes a guide roller, a pressure roller, a pressure-applying movable rod, and several spring rods. The pressure-applying movable rod is slidably connected to the frame, the guide roller is rotatably connected to the frame, the pressure roller is positioned directly above the guide roller, and the pressure roller is rotatably connected to the pressure-applying movable rod. One end of the spring rod is threadedly connected to the pressure-applying movable rod, and the end of the spring rod away from the pressure-applying movable rod is threadedly connected to the frame.

9. A film tension regulator for food packaging processing according to claim 1, characterized in that: The frame is equipped with a winding mechanism, which includes a winding roller, a winding roller mounting base, and a drive motor. The winding roller mounting base is fixed on the frame, and the winding roller is detachably mounted on the winding roller mounting base. The winding roller is rotatably connected to the winding roller mounting base, and the drive motor drives the winding roller to rotate via a belt.

10. A film tension regulator for food packaging processing according to claim 1, characterized in that: The frame is provided with at least two conveying rollers that cooperate with the tension unit, and the conveying rollers are rotatably connected to the frame.

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