Double-air-ring cooling film blowing machine

Abstract

The utility model belongs to the technical field of film blowing machines, and particularly discloses a double-air-ring cooling film blowing machine which comprises a film blowing machine body, a feeding hopper is arranged at the top of the film blowing machine body, air coolers are fixedly installed on the two sides of the film blowing machine body respectively, a concave table is fixedly connected to the front end face of the film blowing machine body, and the concave table is fixedly connected with the feeding hopper. The inner side of the concave table is rotationally connected with a winding roller, a transmission mechanism used for driving the winding roller to rotate is arranged on the concave table, and a dynamic traction mechanism is arranged on the inner side of the concave table. According to the double-air-ring cooling film blowing machine, by introducing the dynamic traction mechanism, the traction angle of a film can be dynamically adjusted, so that the tension of the film in the winding process is better controlled, the problems of film breakage or loose winding and the like caused by non-uniform tension are reduced, and the production efficiency is improved. By means of the design, the traction angle of the traction roller can be dynamically adjusted according to the actual winding condition of the thin film, and the use flexibility and practicability of the device are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of film blowing machine, in particular to a double air ring cooling film blowing machine. BACKGROUND

[0002] The double air ring cooling film blowing machine is a kind of film blowing machine equipment that adopts double air ring cooling system to cool and shape the blown film bubble in the plastic film production process, and its work mainly includes the following steps: firstly, the particles are melted, then the molten plastic is discharged through the die head, and then the film is rolled up after being cooled by the air ring, pulled by the traction roller and wound by the winding roller.

[0003] According to the search, the patent with the publication number CN220720265U discloses a double air ring cooling film blowing machine, which comprises a protective shell, the lower surface of the protective shell is fixedly connected with the upper surface of the supporting leg, the lower surface of the supporting leg is fixedly connected with the upper surface of the supporting bottom plate, the inner surface of the protective shell is fixedly connected with the surface of the feeding pipe, the upper surface of the feeding pipe is fixedly connected with the lower surface of the feeding hopper, the upper end surface of the feeding hopper is threadedly connected with the surface of the feeding hopper cover, the upper surface of the feeding hopper cover is fixedly connected with the lower surface of the feeding hopper cover handle, the inner part of the protective shell is provided with a placing groove, the upper surface of the placing groove is in contact with the lower surface of the motor, the output end of the motor is fixedly connected with the side end of the rotating feeding shaft, and the side end surface of the rotating feeding shaft is in contact with the surface of the rotating hole.

[0004] Although the above-mentioned film blowing machine can improve the film blowing efficiency in winter or at low temperature, the position of the traction roller is relatively fixed during the process of winding the film by the traction roller and the winding roller after the plastic raw material is hot-melt formed, so it is difficult to adjust the traction angle of the traction roller according to the actual winding condition of the film, which may cause uneven stress of the film during the traction process and cause uneven phenomena such as wrinkles and waves. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the utility model aims at solving the defects in the background art and provides a double air ring cooling film blowing machine to solve the problems in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a double air ring cooling film blowing machine, which comprises a film blowing machine body, a feeding hopper is arranged at the top of the film blowing machine body, cold air machines are fixedly installed on the two sides of the film blowing machine body, a die head is arranged on the front end face of the film blowing machine body, a concave table is fixedly connected with the front end face of the film blowing machine body, a winding roller is rotatably connected to the inner side of the concave table, a transmission mechanism for driving the winding roller to rotate is arranged on the concave table, and a dynamic traction mechanism is arranged on the inner side of the concave table.

[0007] Preferably, the transmission mechanism includes a motor fixedly mounted on the outer surface of the recess, the output end of the motor is fixedly connected to a drive shaft, and a drive gear is fixedly sleeved on the outer surface of the drive shaft. The transmission mechanism can drive the take-up roller to rotate, thereby allowing the take-up roller to wind up the film during the rotation process.

[0008] Preferably, the outer surface of the drive gear is meshed with a chain, the outer surface of the take-up roller is fixedly fitted with a transmission gear, and the outer surface of the transmission gear is meshed with the inner side of the chain away from the drive gear.

[0009] Preferably, the dynamic traction mechanism includes a fixed shaft fixedly connected to the inner side of the recess, and a swing bar rotatably connected to the outer surface of the fixed shaft. A sliding hole is opened at the end of the swing bar away from the fixed shaft. The dynamic traction mechanism can change the traction angle of the traction roller to adapt to the actual traction requirements of the film.

[0010] Preferably, a slide rod is slidably connected inside the slide hole, a traction roller is fixedly sleeved on the outer surface of the slide rod, both ends of the slide rod are provided with threaded surfaces, and nuts are threadedly sleeved on the outer surface of the threaded surfaces. The inner diameter of the slide hole is the same as the diameter of the slide rod, so that the slide rod can slide just right.

[0011] Preferably, a bottom shaft is fixedly connected to the inner side of the recessed platform, an electric actuator is rotatably connected to the outer surface of the bottom shaft, a guide shaft is fixedly connected to the outer surface of the swing bar, and the outer surface of the guide shaft is rotatably connected to the output end of the electric actuator.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This dual-air-ring cooling blown film machine introduces a dynamic traction mechanism, which allows the traction angle of the film to be dynamically adjusted. This enables better control of the film tension during the winding process, reducing problems such as film breakage or loose winding caused by uneven tension. This design allows the traction angle of the traction roller to be dynamically adjusted according to the actual winding condition of the film, improving the flexibility and practicality of the device.

[0014] 2. This double-air-ring cooling blown film machine, through the design of the slide bar and nut, enables small-range adjustment of the traction roller position. When fine adjustment of the traction roller position is required, simply tighten the nut to allow it to move along the threaded surface of the slide bar, without limiting the slide bar, and the position of the traction roller can be easily adjusted. After the fine adjustment of the traction roller position is completed, tighten the nut again until it is tightly pressed against the surface of the swing bar to stabilize the traction roller again, thus enabling the blown film machine to adapt to different production needs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this application;

[0016] Figure 2 For this application Figure 1 Enlarged view of point a in the middle;

[0017] Figure 3 This is a schematic diagram of the surface structure of the bar in this application;

[0018] Figure 4 This is a schematic diagram of the slide bar connection structure of this application.

[0019] The components include: 1. Blown film machine body; 2. Feed hopper; 3. Cooler; 4. Die opening; 5. Recessed platform; 6. Motor; 7. Drive shaft; 8. Drive gear; 9. Chain; 10. Transmission gear; 11. Take-up roller; 12. Fixed shaft; 13. Swing bar; 14. Sliding hole; 15. Sliding rod; 16. Traction roller; 17. Threaded surface; 18. Nut; 19. Bottom shaft; 20. Electric actuator; 21. Guide shaft. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Please see Figures 1-4 A double-air-ring cooling blown film machine includes a blown film machine body 1, a feeding hopper 2 on the top of the blown film machine body 1, and cooling fans 3 fixedly installed on both sides of the blown film machine body 1. The cooling fans 3 are located on both sides, which can effectively improve the cooling effect. A die opening 4 is provided on the front end face of the blown film machine body 1. After plastic is formed, it will come out from the die opening 4. A recessed platform 5 is fixedly connected to the front end face of the blown film machine body 1. A take-up roller 11 is rotatably connected to the inner side of the recessed platform 5. A transmission mechanism for driving the take-up roller 11 to rotate is provided on the recessed platform 5. A dynamic traction mechanism is provided on the inner side of the recessed platform 5.

[0022] Through the above technical solution, during the use of the blown film machine, plastic raw materials are fed from the feeding hopper 2 into the blown film machine body 1. After the raw materials are cooled and shaped by the hot melt combined with two sets of cold air fans 3, the shaped film will be discharged from the die 4 and pulled by the traction roller 16, and finally wound together by the winding roller 11. During this process, the traction angle of the film can be changed by the dynamic traction mechanism.

[0023] Specifically, the transmission mechanism includes a motor 6 fixedly mounted on the outer surface of the recess 5, a drive shaft 7 fixedly connected to the output end of the motor 6, and a drive gear 8 fixedly sleeved on the outer surface of the drive shaft 7.

[0024] Through the above technical solution, after the motor 6 is turned on, it can drive the drive shaft 7 to rotate, which in turn drives the gear 8 to rotate. During this process, the chain 9 can transmit the motion of the drive shaft 7 and convert it into the rotation of the take-up roller 11.

[0025] Specifically, the outer surface of the drive gear 8 is meshed with the chain 9, and the outer surface of the take-up roller 11 is fixedly sleeved with the transmission gear 10, and the outer surface of the transmission gear 10 is meshed with the inner side of the chain 9 away from the drive gear 8.

[0026] Through the above technical solution, the transmission system composed of drive gear 8, chain 9 and transmission gear 10 in the transmission mechanism has a transmission wrap angle greater than 120 degrees.

[0027] Specifically, the dynamic traction mechanism includes a fixed shaft 12 fixedly connected to the inner side of the recess 5, a swing bar 13 rotatably connected to the outer surface of the fixed shaft 12, and a sliding hole 14 opened at the end of the swing bar 13 away from the fixed shaft 12.

[0028] With the above technical solution, when the nut 18 does not restrict the slide bar 15, the slide bar 15 can slide along the slide hole 14 so as to make a small position adjustment to the traction roller 16.

[0029] Specifically, a slide rod 15 is slidably connected inside the slide hole 14, and a traction roller 16 is fixedly sleeved on the outer surface of the slide rod 15. Both ends of the slide rod 15 are provided with threaded surfaces 17, and nuts 18 are threadedly sleeved on the outer surface of the threaded surfaces 17.

[0030] The threaded surfaces 17 at both ends of the slide bar 15 are designed to facilitate the sliding of the nut 18 along the threaded surfaces 17 of the slide bar 15. When the nut 18 is pressed tightly against the surface of the swing bar 13, the traction roller 16 is stably positioned on the two sets of swing bars 13 along with the slide bar 15.

[0031] Specifically, a bottom shaft 19 is fixedly connected to the inner side of the recessed platform 5, an electric actuator 20 is rotatably connected to the outer surface of the bottom shaft 19, a guide shaft 21 is fixedly connected to the outer surface of the swing bar 13, and the outer surface of the guide shaft 21 is rotatably connected to the output end of the electric actuator 20.

[0032] Through the above technical solution, the function of the guide shaft 21 is to adapt to the deflection of its own angle during the pushing and pulling process of the electric push rod 20 on the guide shaft 21. Pushing and pulling the guide shaft 21 allows the swing bar 13 to rotate along the fixed shaft 12, that is, to adjust the traction angle of the traction roller 16 on the film.

[0033] Working Principle: After the plastic raw material is melted by the blown film machine body 1, the molten plastic is cooled and shaped by two sets of cold air fans 3, and then comes out from the die 4 in the form of a film. The film is then pulled by the traction roller 16 and wound onto the take-up roller 11. During this process, the motor 6 is turned on to drive the drive shaft 7 to rotate. The drive shaft 7 will drive the drive gear 8 to rotate synchronously, and the chain 9 will drive the transmission gear 10 to rotate synchronously. Finally, the rotation of the transmission gear 10 causes the take-up roller 11 to wind up the film during its rotation. Considering that if the traction angle is incorrect during the process of the traction roller 16 pulling the film to be wound by the take-up roller 11, the film is prone to uneven force during the traction process, resulting in wrinkles and other unevenness. Therefore, compared with the traditional fixed traction equipment, this application designs a dynamic traction mechanism that can adjust the traction angle of the traction roller 16 according to the actual winding condition of the film. That is, the electric push rod 20 pushes and pulls the guide shaft 21. During this process, the bottom end of the electric push rod 20 will move along the bottom shaft. 19 rotates to adapt to its own angular deflection. At the same time, the output end of the electric actuator 20 rotates along the guide shaft 21 and pushes and pulls the swing bar 13 through the guide shaft 21, causing the swing bar 13 to rotate along the surface of the fixed shaft 12. This allows the traction angle of the traction roller 16 at the other end of the swing bar 13 to be adjusted until the traction roller 16 is adjusted to a suitable angle. In addition, the nuts 18 can be screwed along the threaded surface 17 of the slide bar 15, allowing the two sets of nuts 18 to gradually move away from the swing bar 13, thus no longer limiting the slide bar 15. As a result, the slide bar 15 can be slid along the slide hole 14, causing the traction roller 16 to make a small adjustment in position. Finally, the nut 18 is screwed back on, allowing the nut 18 to rotate along the threaded surface 17 and move axially on the slide bar 15 while gradually approaching the swing bar 13 until it is tightly pressed against the swing bar 13. This effectively limits the slide bar 15, thereby stabilizing the traction roller 16 after its position has changed. This further improves the position and angle adjustment range of the traction roller 16, increasing the flexibility and practicality of the device.

[0034] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-air-ring cooling blown film machine, comprising a blown film machine body (1), characterized in that: The blown film machine body (1) is provided with a feeding hopper (2) on the top. Cooling fans (3) are fixedly installed on both sides of the blown film machine body (1). A die opening (4) is provided on the front end face of the blown film machine body (1). A recessed platform (5) is fixedly connected to the front end face of the blown film machine body (1). A take-up roller (11) is rotatably connected to the inner side of the recessed platform (5). A transmission mechanism for driving the take-up roller (11) to rotate is provided on the recessed platform (5). A dynamic traction mechanism is provided on the inner side of the recessed platform (5).

2. The double-air-ring cooling blown film machine according to claim 1, characterized in that: The transmission mechanism includes a motor (6) fixedly installed on the outer surface of the recess (5), and a drive shaft (7) is fixedly connected to the output end of the motor (6). A drive gear (8) is fixedly sleeved on the outer surface of the drive shaft (7).

3. The double-air-ring cooling blown film machine according to claim 2, characterized in that: The outer surface of the drive gear (8) is meshed with a chain (9), and the outer surface of the take-up roller (11) is fixedly fitted with a transmission gear (10), and the outer surface of the transmission gear (10) is meshed with the inner side of the chain (9) away from the drive gear (8).

4. The double-air-ring cooling blown film machine according to claim 1, characterized in that: The dynamic traction mechanism includes a fixed shaft (12) fixedly connected to the inner side of the recess (5), and a swing bar (13) is rotatably connected to the outer surface of the fixed shaft (12). A sliding hole (14) is provided at one end of the swing bar (13) away from the fixed shaft (12).

5. The double-air-ring cooling blown film machine according to claim 4, characterized in that: A slide rod (15) is slidably connected inside the slide hole (14). A traction roller (16) is fixedly sleeved on the outer surface of the slide rod (15). Both ends of the slide rod (15) are provided with threaded surfaces (17). Nuts (18) are threadedly sleeved on the outer surface of the threaded surfaces (17).

6. The double-air-ring cooling blown film machine according to claim 4, characterized in that: The inner side of the recessed platform (5) is fixedly connected to a bottom shaft (19), and the outer surface of the bottom shaft (19) is rotatably connected to an electric push rod (20). The outer surface of the swing bar (13) is fixedly connected to a guide shaft (21), and the outer surface of the guide shaft (21) is rotatably connected to the output end of the electric push rod (20).

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