Packaging bag film blowing cooling device

Abstract

The utility model belongs to the technical field of packaging bag film blowing, particularly relates to a packaging bag film blowing cooling device, and aims to solve the problems that a packaging bag film is easy to deform and the defect of a film surface is difficult to detect in the background technology, and adopts the following scheme that the packaging bag film blowing cooling device comprises a bedplate, and a defect detection mechanism is arranged on the outer wall of the top of the bedplate; and a packaging bag shaping mechanism is arranged on the outer wall of the bottom of the platen and located at the bottom of the defect detection mechanism. The guide wheel driven by the electric push rod uniformly applies pressure to a film surface, so that a cooled packaging bag film can be subjected to multidirectional dynamic shaping, local stress concentration is eliminated, film bubbles are kept in a cylindrical shape in the cooling process, rolling deformation is avoided, and the rejection rate of subsequent processing is reduced; the rotating ring and the visual sensor are driven to rotate and scan by 360 degrees in the circumferential direction of the packaging bag film, dead-angle-free real-time detection is achieved, the defect recognition efficiency and accuracy can be greatly improved, and the consistency of product quality is ensured.

Description

Technical Field

[0001] This utility model relates to the field of blown film technology for packaging bags, and in particular to a cooling device for blown film of packaging bags. Background Technology

[0002] Film blowing and cooling technology is a crucial step in plastic packaging production. It primarily involves forming a tubular film from molten plastic through extrusion blow molding and then rapidly cooling and solidifying it to achieve the desired mechanical properties and appearance. In traditional processes, molten plastic is extruded through a screw extruder and then forms a film bubble through a ring die, followed by initial cooling using a cooling air ring. However, the film bubble is susceptible to temperature gradients and uneven airflow during cooling, leading to problems such as deformation and uneven thickness during subsequent processing.

[0003] Therefore, the following shortcomings exist in the cooling process of blown film for packaging bags: First, the cooled packaging bag film is prone to local deformation during the winding process due to the release of residual stress, making it difficult to maintain the ideal cylindrical shape, which leads to an increased scrap rate in subsequent slitting and bag making processes; Second, traditional detection methods mostly rely on manual visual inspection or offline sampling inspection, making it difficult to monitor film surface defects (such as cracks, bubbles, etc.) in real time. In particular, small defects are easily missed on high-speed production lines, causing potential quality risks. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a packaging bag blown film cooling device, which overcomes the shortcomings of the prior art and effectively solves the problems of easy deformation of packaging bag film and difficulty in detecting film surface defects.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A packaging bag blown film cooling device includes a platform. A defect detection mechanism is provided on the top outer wall of the platform, and a packaging bag shaping mechanism is provided on the bottom outer wall of the platform at the bottom of the defect detection mechanism. The defect detection mechanism includes a rotating ring rotatably connected to the top outer wall of the platform, a gear ring welded to the outer wall of the rotating ring, a gear meshing with the outer wall of the gear ring, a servo motor fixedly connected to the center of the top outer wall of the gear, a connecting seat welded to the top outer wall of the rotating ring, and a vision sensor fixedly connected to the top outer wall of the connecting seat by screws.

[0007] The packaging bag shaping mechanism includes a top ring fixed to the outer wall of the bottom of the platform by screws, a bottom ring set on the outer wall of the bottom of the top ring, H-shaped frames welded between the top ring and the bottom ring at equal distances, an electric push rod installed on one side of the outer wall of the H-shaped frame, a U-shaped frame installed on the piston rod of the electric push rod, and a guide wheel rotatably connected to the inner wall of the U-shaped frame.

[0008] Preferably, a support platform is welded to the top outer wall of the platform, and the servo motor is fixedly connected to the top outer wall of the support platform by screws.

[0009] Preferably, symmetrically distributed guide rods are fixedly connected to one side of the outer wall of the U-shaped frame, and the guide rods are slidably connected to the inner wall of the U-shaped frame.

[0010] Preferably, a packaging bag feeder is provided at the bottom of the platform, and an annular air duct is installed on the top outer wall of the packaging bag feeder. An air inlet pipe is fixedly connected to one side of the outer wall of the annular air duct via a flange.

[0011] Preferably, the top of the packaging bag feeder is provided with a cylindrical packaging bag film inside the annular air duct, and the guide wheel is slidably connected to the outer wall of the packaging bag film.

[0012] Preferably, a screw extruder is fixedly connected to one side of the outer wall of the packaging bag discharge machine via a flange, and a feed hopper is welded to the top of one end of the outer wall of the screw extruder. An annular heater is installed on the outer wall of the screw extruder.

[0013] Preferably, a frame is welded to the bottom outer wall of the platform.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. The packaging bag blown film cooling device designed in this paper uses a rigid support frame composed of a top ring, a bottom ring and an H-shaped structure, combined with a guide wheel driven by an electric push rod to apply pressure evenly to the film surface. This allows for multi-directional dynamic shaping of the cooled packaging bag film, eliminating local stress concentration, ensuring that the film bubble maintains a cylindrical shape during the cooling process, avoiding winding deformation, and reducing the scrap rate in subsequent processing.

[0016] 2. The blown film cooling device for packaging bags designed in this way uses a servo motor to drive a gear and a gear ring, which in turn drives a rotating ring and a vision sensor to rotate 360° around the packaging bag film, enabling real-time detection without blind spots. The vision sensor can capture defects such as film cracks and impurities, replacing traditional manual inspection, which can significantly improve the efficiency and accuracy of defect identification and ensure product quality consistency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a packaging bag blown film cooling device proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of a defect detection mechanism for a blown film cooling device for packaging bags proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure of the packaging bag shaping mechanism of the packaging bag blowing film cooling device proposed in this utility model;

[0020] Figure 4 This is a schematic diagram showing the disassembled structure of the packaging bag shaping mechanism of a packaging bag blowing and cooling device proposed in this utility model.

[0021] In the diagram: 1. Platform; 2. Defect detection mechanism; 21. Rotating ring; 22. Gear ring; 23. Gear; 24. Servo motor; 25. Connecting seat; 26. Vision sensor; 3. Packaging bag shaping mechanism; 31. Top ring; 32. H-shaped frame; 33. Bottom ring; 34. Electric push rod; 35. U-shaped frame; 36. Guide wheel; 4. Support platform; 5. Guide rod; 6. Packaging bag feeder; 7. Annular air duct; 8. Air inlet pipe; 9. Screw extruder; 10. Feed hopper; 11. Annular heater; 12. Frame. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 1-4 Example 1: A packaging bag blown film cooling device includes a platform 1. A defect detection mechanism 2 is provided on the top outer wall of the platform 1, and a packaging bag shaping mechanism 3 is provided on the bottom outer wall of the platform 1 at the bottom of the defect detection mechanism 2. A frame 12 is welded to the bottom outer wall of the platform 1. The defect detection mechanism 2 includes a rotating ring 21 rotatably connected to the top outer wall of the platform 1, a gear ring 22 welded to the outer wall of the rotating ring 21, a gear 23 meshing with the outer wall of the gear ring 22, a servo motor 24 fixedly connected to the center of the top outer wall of the gear 23, a connecting seat 25 welded to the top outer wall of the rotating ring 21, and a vision sensor 26 fixedly connected to the top outer wall of the connecting seat 25 by screws. A support platform 4 is welded to the top outer wall of the platform 1, and the servo motor 24 is fixedly connected to the top outer wall of the support platform 4 by screws.

[0024] In this embodiment, the servo motor 24 drives the gear 23 to mesh with the gear ring 22, thereby driving the rotating ring 21 to rotate at a set speed. The vision sensor 26 is fixed to the rotating ring 21 via the connecting seat 25 and rotates synchronously with it to acquire images of the film surface in real time.

[0025] In embodiment 2, the packaging bag shaping mechanism 3 includes a top ring 31 fixedly connected to the bottom outer wall of the platform 1 by screws, a bottom ring 33 disposed on the bottom outer wall of the top ring 31, an H-shaped frame 32 equally distributed between the top ring 31 and the bottom ring 33 welded together, an electric push rod 34 installed on one side outer wall of the H-shaped frame 32, a U-shaped frame 35 installed on the piston rod of the electric push rod 34, and a guide wheel 36 rotatably connected to the inner wall of the U-shaped frame 35. A symmetrically distributed guide rod 5 is fixedly connected to one side outer wall of the U-shaped frame 35, and the guide rod 5 is slidably connected to the inner wall of the U-shaped frame 35.

[0026] In this embodiment, the top ring 31 and the bottom ring 33 are connected by an H-shaped frame 32 to form a ring support structure. An electric push rod 34 is mounted on the side wall of the H-shaped frame 32, and a guide wheel 36 is mounted on the U-shaped frame 35 at the end of the piston rod of the electric push rod 34. Furthermore, the guide rod 5 restricts the U-shaped frame 35 to slide only axially, ensuring that the guide wheel 36 applies radial pressure to the packaging bag film without deflection.

[0027] The bottom of the platform 1 is provided with a packaging bag feeder 6, and the top outer wall of the packaging bag feeder 6 is equipped with an annular air duct 7. An air inlet pipe 8 is fixedly connected to one side of the outer wall of the annular air duct 7 through a flange. A cylindrical packaging bag film is provided on the top of the packaging bag feeder 6 inside the annular air duct 7, and a guide wheel 36 is slidably connected to the outer wall of the packaging bag film.

[0028] The platform 1 is fixed to the production line via the frame 12. A support platform 4 is welded to the top of the platform 1 to fix the servo motor 24. A packaging bag feeder 6 is installed at the bottom of the platform 1. The packaging bag feeder 6 has an annular air duct 7 at the top, and cooling airflow is input through the air inlet pipe 8 to uniformly cool the packaging bag film.

[0029] The outer wall of the packaging bag discharge machine 6 is fixedly connected to a screw extruder 9 via a flange, and a feed hopper 10 is welded to the top of the outer wall of one end of the screw extruder 9. An annular heater 11 is installed on the outer wall of the screw extruder 9.

[0030] The screw extruder 9 is connected to the packaging bag feeder 6 via a flange. Plastic granules are fed into its feed hopper 10, melted by the annular heater 11, and then extruded through the die head to form a packaging bag film.

[0031] Working principle:

[0032] Melt extrusion and preliminary cooling: Plastic granules enter the screw extruder 9 through the feed hopper 10, are heated and melted, and then extruded by the packaging bag discharge machine 6 to form a cylindrical packaging bag film. Cooling air is introduced into the annular air duct 7 through the air inlet pipe 8 to uniformly cool the outer surface of the packaging bag film.

[0033] Dynamic shaping control: During the cooling process of the packaging film, the electric push rod 34 pushes the U-shaped frame 35 according to the preset pressure parameters, so that the guide wheel 36 is in close contact with the outer wall of the packaging film. The guide rod 5 ensures that the movement trajectory of the guide wheel 36 is linear, avoids lateral deviation, and maintains the cylindrical shape of the packaging film.

[0034] Defect detection stage: After the servo motor 24 starts, the gear 23 meshes with the gear ring 22, driving the rotating ring 21 and the vision sensor 26 to rotate circumferentially along the packaging bag film. The vision sensor 26 captures images of the film surface at high frequency, identifies defects such as cracks and bubbles through image processing algorithms, and transmits the signals to the control terminal.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A packaging bag film blowing and cooling apparatus comprising a table (1), characterized in that, The platform (1) is provided with a defect detection mechanism (2) on the top outer wall, and a packaging bag shaping mechanism (3) is provided on the bottom outer wall of the platform (1) at the bottom of the defect detection mechanism (2). The defect detection mechanism (2) includes a rotating ring (21) rotatably connected to the top outer wall of the platform (1), a gear ring (22) welded to the outer wall of the rotating ring (21), a gear (23) meshing with the outer wall of the gear ring (22), a servo motor (24) fixedly connected to the center of the top outer wall of the gear (23), a connecting seat (25) welded to the top outer wall of the rotating ring (21), and a vision sensor (26) fixedly connected to the top outer wall of the connecting seat (25) by screws. The packaging bag shaping mechanism (3) includes a top ring (31) fixed to the bottom outer wall of the platform (1) by screws, a bottom ring (33) set on the bottom outer wall of the top ring (31), an H-shaped frame (32) welded between the top ring (31) and the bottom ring (33) at equal distances, an electric push rod (34) installed on one side outer wall of the H-shaped frame (32), a U-shaped frame (35) installed on the piston rod of the electric push rod (34), and a guide wheel (36) rotatably connected to the inner wall of the U-shaped frame (35).

2. A film blowing and cooling apparatus for packaging bags according to claim 1, wherein The top outer wall of the platform (1) is welded with a support platform (4), and the servo motor (24) is fixedly connected to the top outer wall of the support platform (4) by screws.

3. A film blowing and cooling apparatus for packaging bags according to claim 1, wherein The outer wall of one side of the U-shaped frame (35) is fixedly connected with symmetrically distributed guide rods (5), and the guide rods (5) are slidably connected to the inner wall of the U-shaped frame (35).

4. The film blowing and cooling apparatus for packaging bags according to claim 1, wherein The bottom of the platform (1) is provided with a packaging bag discharge machine (6), and the outer wall of the top of the packaging bag discharge machine (6) is equipped with an annular air duct (7). An air inlet pipe (8) is fixedly connected to one side of the outer wall of the annular air duct (7) through a flange.

5. A film blowing and cooling apparatus for packaging bags according to claim 4, wherein The top of the packaging bag feeder (6) is located inside the annular air duct (7) and a cylindrical packaging bag film is provided, and the guide wheel (36) is slidably connected to the outer wall of the packaging bag film.

6. A film blowing and cooling apparatus for packaging bags according to claim 4, wherein The outer wall of the packaging bag feeder (6) is fixedly connected to a screw extruder (9) via a flange, and a feed hopper (10) is welded to the top of the outer wall of one end of the screw extruder (9). An annular heater (11) is installed on the outer wall of the screw extruder (9).

7. The packaging bag film blowing and cooling apparatus according to claim 1, wherein The bottom outer wall of the platform (1) is welded with a frame (12).

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