Upper clamping traction device for film blowing machine

Abstract

The utility model relates to an upper clamping traction device for a film blowing machine, which comprises a herringbone ladder and a rotating frame sleeved on the periphery of the herringbone ladder, the rotating frame is linked with a clamping traction roller group distributed above the herringbone ladder, a turning roller is arranged between the clamping traction roller group and the rotating frame, and a plurality of groups of flattening rollers arranged at intervals are distributed on the periphery of the rotating frame. The rotating frame is linked with a rotating mechanism; the turning roller can turn a film passing through the clamping and pulling roller set and pull the film to the flattening roller on the periphery of the rotating frame, and the rotating mechanism can drive the rotating frame to do reciprocating operation around the central axis of the herringbone ladder. The upper clamping traction device for the film blowing machine has the beneficial effects that the steering roller, the flattening roller and the rotating frame are integrated together and do reciprocating operation around the central axis of the herringbone ladder, so that the compact design of the structure is realized, the occupied area of equipment is reduced, the space utilization rate is improved, and the transportation is also facilitated.

Description

Technical Field

[0001] The utility model particularly relates to an upper clamping and traction device for a film blowing machine. Background Art

[0002] The film blowing machine heats and melts plastic particles and then blows them into thin films. There are many types of film blowing machines, including PE, POF, PVC, etc. The new materials blown out by the new particles are new materials with uniform color, clean, and good bag stretching. The film blowing machine adds dry polyethylene particles into the lower hopper, and the particles enter the screw from the hopper by their own weight. When the particles come into contact with the bevel of the thread, the rotating bevel surface produces a thrust perpendicular to the bevel surface on the plastic, pushing the plastic particles forward. During the pushing process, due to the friction between the plastic and the screw, the plastic and the barrel, and the collision and friction between the particles, and also due to the external heating of the barrel, the plastic gradually melts. The molten plastic is filtered through the machine head to remove impurities and comes out from the die head. It is cooled by the air ring, blown, and passed through the herringbone plate and the traction roller, and the finished film is rolled into a tube.

[0003] The upper clamping traction device is a part of the film blowing machine. For example, the Chinese utility model patent with the publication number "CN213802177U" discloses an upper traction rotating mechanism of a large film blowing machine, which is mainly composed of a herringbone plate gantry, a traction frame, a herringbone plate, a rotating mechanism, several groups of flattening rollers, aluminum rollers, etc., wherein several groups of flattening rollers, aluminum rollers, rotating mechanisms, etc. are distributed above the herringbone plate, and the cylindrical film material is pulled up to the traction rollers and rotating mechanisms by the herringbone plate to become a sheet of film. At the same time, in order to avoid uneven film wall thickness at various locations, the rotating mechanism will drive the sheet of film to reciprocate, and then the winding mechanism in the film blowing machine will wind up the sheet of film.

[0004] The upper traction rotating mechanism has the following problems:

[0005] The current design of the upper traction rotating mechanism has significant structural defects, which make the entire mechanism abnormally large. The mechanism shows excessive ductility in both longitudinal and lateral dimensions, which is extremely disadvantageous in engineering applications. This increase in size is mainly caused by the stacking arrangement of the rotating mechanism, traction rollers and herringbone plates in the vertical direction. Furthermore, the arrangement of the flattening rollers and aluminum rollers is also concentrated on one side of the rotating mechanism. From the attached documents of the relevant public documents, it can be seen that the flattening rollers and aluminum rollers are arranged on one side of the rotating mechanism. Figure 1 This can be observed intuitively in .

[0006] This structural layout not only leads to inefficient space utilization, but also causes dynamic problems in mechanical operation, such as unbalanced load and excessive vibration. In addition, the large volume will also cause additional difficulties in the installation, maintenance and transportation of the machine. Therefore, the present application aims to improve the existing upper traction rotating mechanism to optimize its structural design, reduce the volume, improve the space utilization, and ensure the stability and reliability of the mechanical operation. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a clamping traction device for a film blowing machine in view of the deficiencies of the above-mentioned prior art. By integrating the steering roller, the flattening roller and the rotating frame together, they reciprocate around the central axis of the herringbone ladder, thereby achieving a compact structural design, reducing the footprint of the equipment, improving space utilization, and facilitating transportation.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a clamping and traction device for a film blowing machine includes a herringbone ladder, which is characterized in that it also includes a rotating frame sleeved on the outer periphery of the herringbone ladder, the rotating frame is linked to a clamping and traction roller group distributed above the herringbone ladder, a steering roller is provided between the clamping and traction roller group and the rotating frame, a plurality of groups of flattening rollers arranged at intervals are distributed on the outer periphery of the rotating frame, and the rotating frame is linked to a rotating mechanism; the steering roller can deflect the film passing through the clamping and traction roller group and pull it to the flattening roller on the outer periphery of the rotating frame, and the rotating mechanism can drive the rotating frame to reciprocate around the central axis of the herringbone ladder.

[0009] By adopting the above technical solution, by integrating the steering roller, flattening roller and rotating frame together and reciprocating around the central axis of the herringbone ladder, a compact structural design is achieved, the footprint of the equipment is reduced, and the space utilization rate is improved, which is also convenient for transportation. The structural layout of the device takes into account the convenience of operation and maintenance, making it easier to adjust and maintain the machine during the production process. By setting the steering roller and the flattening roller distributed around the outer periphery of the rotating frame, the film transported by the clamping traction roller group can be turned and smoothly pulled to the flattening roller. The film can be transmitted more smoothly during the production process, reducing the problems of wrinkles and uneven tension, thereby improving the overall quality of the film.

[0010] The above-mentioned upper clamping traction device for the film blowing machine can be further configured as follows: the rotating mechanism includes a mounting seat distributed below the rotating mechanism, a slewing bearing is provided in the middle of the mounting seat, the slewing bearing includes an inner gear ring and a slewing outer ring sleeved on the outer periphery of the inner gear ring, the inner gear ring is fixedly connected to the mounting seat, the slewing outer ring is linked to the optional frame, the rotating mechanism includes a motor installed on the rotating frame, the output end of the motor is linked to a driving gear, and the driving gear is meshed with the inner gear ring gear.

[0011] By adopting the above-mentioned technical scheme, the rotating mechanism designed in this application uses a slewing bearing as the main force transmission structure. The slewing bearing has the characteristics of strong load-bearing capacity, high stability, low maintenance cost, strong adaptability, high precision and space saving. It can be well combined with the rotating frame designed in this application to realize the reciprocating rotational motion of the rotating frame.

[0012] The above-mentioned upper clamping traction device for the film blowing machine can be further configured as follows: a motor mounting plate is provided at the lower end of the rotating frame, a plurality of groups of strip grooves are provided on the motor mounting plate, screw holes corresponding to the strip grooves are provided on the rotating frame, and a through hole is provided in the middle of the motor mounting plate for the motor main shaft to pass through.

[0013] With the above technical solution, the strip grooves on the motor mounting plate and the screw holes on the rotating frame are combined to allow the motor to be flexibly positioned during installation. The assembly is convenient, so that the motor can be quickly and accurately installed on the rotating frame, and the position of the motor can be fine-tuned through the adjustment margin provided by the strip grooves to ensure rotation accuracy and balance.

[0014] The above-mentioned upper clamping traction device for the film blowing machine can be further configured as follows: the lower end of the rotating frame is also provided with a plurality of groups of spaced-apart outer ring connecting plates, the outer ring connecting plates have arc-shaped sides and are provided with a plurality of connecting holes, and the outer ring connecting plates are connected to the rotating outer ring through the connecting holes.

[0015] By adopting the above technical solution, several groups of spaced outer ring connecting plates increase the connection points between the rotating frame and the rotating outer ring, disperse the load, and thus improve the linkage stability and reliability of the rotating frame and the rotating mechanism. It ensures that the rotating frame and the rotating outer ring can maintain a firm connection under high-speed or high-load operation conditions.

[0016] The upper clamping traction device for the film blowing machine can be further configured as follows: the clamping traction roller group includes a lower active traction roller and a lower passive traction roller, the lower active traction roller and the lower passive traction roller are symmetrical to each other and are distributed above the herringbone ladder, the lower active traction roller is located on the side away from the lower passive traction roller and an upper active traction roller is provided, the upper passive traction roller is symmetrically provided above the upper active traction roller, the center point connection line of the lower active traction roller and the lower passive traction roller is connected to the center point of the upper active traction roller and the upper passive traction roller and is perpendicular to each other; the clamping traction roller group also includes a lower pressure guide roller distributed between the upper active traction roller and the steering roller.

[0017] By adopting the above technical solution, a relatively uniform traction force field is formed through the symmetrical arrangement of the lower active traction roller and the lower passive traction roller, and the additional upper active traction roller and the upper passive traction roller, which is conducive to achieving uniform traction of the film, reducing local stress concentration, and improving the surface quality of the film. Furthermore, the lower pressure guide roller is arranged between the upper active traction roller and the steering roller, which helps to guide the film to maintain the correct running track, reduce the film jitter or deviation caused by high-speed operation or tension changes, and improve the stability of the film during the production process.

[0018] The above-mentioned upper clamping traction device for the film blowing machine can be further configured as follows: the rotating frame is fixedly connected to a mounting panel, and the lower active traction roller, lower passive traction roller, upper active traction roller, upper passive traction roller, and lower pressure guide roller are all rotatably mounted on the mounting panel.

[0019] With the above technical solution, the mounting panel provides a fixed platform for the traction roller and the guide roller, ensuring that they maintain the correct relative position during the production process, thereby optimizing the traction and guidance of the film, improving production efficiency and the quality of the final product.

[0020] The utility model is further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0022] Figure 2 This is an exploded schematic diagram of the rotating mechanism of an embodiment of the utility model;

[0023] Figure 3 It is a top view schematic diagram of the rotating mechanism of an embodiment of the utility model;

[0024] Figure 4 This is an exploded schematic diagram of the motor part of an embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of a clamping traction roller group according to an embodiment of the utility model.

[0026] Reference numerals: herringbone ladder 1, rotating frame 2; clamping traction roller group 3, lower active traction roller 31, lower passive traction roller 32, upper active traction roller 33, upper passive traction roller 34, lower pressure guide roller 35; steering roller 4, flattening roller 5, mounting seat 6; slewing bearing 7, inner gear ring 71, slewing outer ring 72; motor 8; motor mounting plate 9, strip groove 91, through hole 92; outer ring connecting plate 10, connecting hole 11, mounting panel 12, driving gear 13. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figures 1 to 5The film blowing machine shown uses a clamping traction device, including a herringbone ladder 1, and also includes a rotating frame 2 sleeved on the periphery of the herringbone ladder 1, the rotating frame 2 is linked with a clamping traction roller group 3 distributed above the herringbone ladder 1, a steering roller 4 is arranged between the clamping traction roller group 3 and the rotating frame 2, and multiple groups of flattening rollers 5 arranged at intervals are distributed on the periphery of the rotating frame 2, and the rotating frame 2 is linked with a rotating mechanism; the steering roller 4 can turn the film passing through the clamping traction roller group 3 and pull it to the flattening roller 5 on the periphery of the rotating frame 2, and the rotating mechanism can drive the rotating frame 2 to reciprocate around the central axis of the herringbone ladder 1. By integrating the steering roller 4, the flattening roller 5 and the rotating frame 2 together, and reciprocating around the central axis of the herringbone ladder 1, a compact design of the structure is achieved, the floor space of the equipment is reduced, and the space utilization rate is improved, which is also convenient for transportation. The structural layout of the device takes into account the convenience of operation and maintenance, making it easier to adjust and maintain the machine during the production process. By providing a steering roller 4 and a flattening roller 5 distributed around the outer periphery of the rotating frame 2, the film transported by the clamping traction roller group 3 can be turned and smoothly pulled to the flattening roller 5. The film can be transmitted more smoothly during the production process, and the problems of wrinkles and uneven tension are reduced, thereby improving the overall quality of the film.

[0029] The rotating mechanism includes a mounting seat 6 distributed below the rotating mechanism, a slewing bearing 7 is provided in the middle of the mounting seat 6, the slewing bearing 7 includes an inner gear ring 71 and a slewing outer ring 72 sleeved on the outer periphery of the inner gear ring 71, the inner gear ring 71 is fixedly connected to the mounting seat 6, the slewing outer ring 72 is linked to the optional frame, and the rotating mechanism includes a motor 8 installed on the rotating frame 2, the output end of the motor 8 is linked to a driving gear 13, and the driving gear 13 is gear-engaged with the inner gear ring 71. The rotating mechanism designed in the present application uses the slewing bearing 7 as the main force transmission structure, and the slewing bearing 7 has the characteristics of strong load-bearing capacity, high stability, low maintenance cost, strong adaptability, high precision and space saving, etc., which can be well combined with the rotating frame 2 designed in the present application and realize the reciprocating rotation motion of the rotating frame 2.

[0030] The lower end of the rotating frame 2 is provided with a motor mounting plate 9, on which a plurality of strip grooves 91 are provided, the rotating frame 2 is provided with screw holes corresponding to the strip grooves 91, and the middle of the motor mounting plate 9 is provided with a through hole 92 for the main shaft of the motor 8 to pass through. The strip grooves 91 on the motor mounting plate 9 are combined with the screw holes on the rotating frame 2 to allow the motor 8 to be flexibly positioned during the installation process. The assembly is convenient, so that the motor 8 can be quickly and accurately installed on the rotating frame 2, and the position of the motor 8 can be fine-tuned through the adjustment margin provided by the strip grooves 91 to ensure the rotation accuracy and balance.

[0031] The lower end of the rotating frame 2 is also provided with two sets of spaced outer ring connecting plates 10, the side of the outer ring connecting plates 10 is arc-shaped and provided with multiple sets of connecting holes 11, and the outer ring connecting plates 10 are connected to the rotating outer ring 72 through the connecting holes 11. The two sets of spaced outer ring connecting plates 10 increase the connection points between the rotating frame 2 and the rotating outer ring 72, disperse the load, and thus improve the linkage stability and reliability of the rotating frame 2 and the rotating mechanism. It ensures that the rotating frame 2 and the rotating outer ring 72 can maintain a firm connection under high-speed or high-load operation conditions.

[0032] The clamping traction roller group 3 includes a lower active traction roller 31 and a lower passive traction roller 32, which are symmetrical to each other and are distributed above the herringbone ladder 1. The lower active traction roller 31 is provided with an upper active traction roller 33 on the side away from the lower passive traction roller 32, and an upper passive traction roller 34 is symmetrically provided above the upper active traction roller 33. The center point connecting line of the lower active traction roller 31 and the lower passive traction roller 32 is connected with the center points of the upper active traction roller 33 and the upper passive traction roller 34 and is perpendicular to each other. The clamping traction roller group 3 also includes a downward pressure guide roller 35 distributed between the upper active traction roller 33 and the steering roller 4. Through the symmetrical arrangement of the lower active traction roller 31 and the lower passive traction roller 32, and the additional arrangement of the upper active traction roller 33 and the upper passive traction roller 34, a relatively uniform traction force field is formed, which is conducive to achieving uniform traction of the film, reducing local stress concentration, and improving the surface quality of the film. Furthermore, the downward pressure guide roller 35 is arranged between the upper active traction roller 33 and the steering roller 4, which helps to guide the film to maintain the correct running trajectory, reduce the film shaking or deviation caused by high-speed operation or tension changes, and improve the stability of the film during the production process.

[0033] The rotating frame 2 is fixedly connected with a mounting panel 12, and the lower active traction roller 31, the lower passive traction roller 32, the upper active traction roller 33, the upper passive traction roller 34, and the lower pressure guide roller 35 are all rotatably mounted on the mounting panel 12. The mounting panel 12 provides a fixed platform for the traction rollers and guide rollers to ensure that they maintain the correct relative position during the production process, thereby optimizing the traction and guidance of the film, improving the production efficiency and the quality of the final product.

[0034] Working principle: The cylindrical film passes through the herringbone ladder 1 and the clamping traction roller group 3 in turn, and will become a single-layer film. The steering roller 4 will then turn the film transported by the clamping traction roller group 3, and the lateral transportation will be changed into the transportation around the flattening roller 5. At the same time, the rotating mechanism can control the rotating frame 2 to rotate back and forth to make the film uniform everywhere.

Claims

1. The upper clamping traction device for the film blowing machine includes a herringbone ladder, which is characterized by: It also includes a rotating frame sleeved on the outer periphery of the herringbone ladder, the rotating frame is linked to a clamping and traction roller group distributed above the herringbone ladder, a steering roller is provided between the clamping and traction roller group and the rotating frame, a plurality of groups of spaced flattening rollers are distributed on the outer periphery of the rotating frame, and the rotating frame is linked to a rotating mechanism; the steering roller can deflect the film passing through the clamping and traction roller group and pull it to the flattening roller on the outer periphery of the rotating frame, and the rotating mechanism can drive the rotating frame to reciprocate around the central axis of the herringbone ladder.

2. The upper clamping and traction device for the film blowing machine according to claim 1, characterized in that: The rotating mechanism includes a mounting seat distributed below the rotating mechanism, a slewing bearing is provided in the middle of the mounting seat, the slewing bearing includes an inner gear ring and a slewing outer ring sleeved on the outer periphery of the inner gear ring, the inner gear ring is fixedly connected to the mounting seat, the slewing outer ring is linked to the optional frame, the rotating mechanism includes a motor installed on the rotating frame, the output end of the motor is linked to a driving gear, and the driving gear is meshed with the inner gear ring gear.

3. The upper clamping and traction device for the film blowing machine according to claim 2, characterized in that: A motor mounting plate is provided at the lower end of the rotating frame, a plurality of strip grooves are provided on the motor mounting plate, screw holes corresponding to the strip grooves are provided on the rotating frame, and a through hole for the motor main shaft to pass through is provided in the middle of the motor mounting plate.

4. The upper clamping and traction device for the film blowing machine according to claim 3 is characterized in that: The lower end of the rotating frame is also provided with a plurality of groups of outer ring connecting plates which are spaced apart. The side surfaces of the outer ring connecting plates are arc-shaped and are provided with a plurality of groups of connecting holes. The outer ring connecting plates are connected to the rotating outer ring through the connecting holes.

5. The upper clamping and traction device for a film blowing machine according to any one of claims 1 to 4, characterized in that: The clamping traction roller group includes a lower active traction roller and a lower passive traction roller, which are symmetrical to each other and are distributed above the herringbone ladder. The lower active traction roller is provided with an upper active traction roller on the side away from the lower passive traction roller, and an upper passive traction roller is symmetrically provided above the upper active traction roller. The center point connection line of the lower active traction roller and the lower passive traction roller is connected to the center point of the upper active traction roller and the upper passive traction roller and is perpendicular to each other; the clamping traction roller group also includes a lower pressure guide roller distributed between the upper active traction roller and the steering roller.

6. The upper clamping and traction device for a film blowing machine according to claim 5, characterized in that: The rotating frame is fixedly connected with a mounting panel, and the lower active traction roller, the lower passive traction roller, the upper active traction roller, the upper passive traction roller, and the lower pressure guide roller are all rotatably mounted on the mounting panel.

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