A cooling structure for thin film blow molding

Abstract

This utility model belongs to the field of film blow molding technology, specifically relating to a cooling structure for film blow molding, including a cooling ring. The inner side of the cooling ring has several air outlets, and a flow guiding assembly connected to the air outlets is also provided on the inner side of the cooling ring. Several through slots are evenly distributed on the sidewall of the cooling ring, and each through slot contains a swinging assembly. The flow guiding assembly includes multiple annular tubes fixedly connected to the inner wall of the cooling ring, and these annular tubes are interconnected. Multiple flexible hoses are fixedly connected to the sidewall of each annular tube, and the other end of each flexible hose is connected to an air outlet. This utility model can uniformly cool the film by setting up an independent cooling structure, thus improving the cooling effect.

Description

Technical Field

[0001] This utility model belongs to the field of film blow molding technology, and specifically relates to a cooling structure for film blow molding. Background Technology

[0002] In film blow molding, the cooling process is a critical step that determines the quality of film forming, production efficiency, and product performance. Currently, the industry commonly uses an air ring cooling method, which involves delivering cooling airflow to the outside of the blow-molded tubular film through an annular air ring located below the die head, thereby achieving rapid cooling and shaping of the film.

[0003] Traditional air rings typically have a fixed air outlet design, with no flexible adjustment of the outlet angle. Due to variations in film thickness, diameter, and material during blow molding, the requirements for the direction and coverage of the cooling airflow differ. A fixed outlet angle makes it difficult to ensure uniform airflow across the film's outer surface, easily leading to uneven cooling in certain areas. Uneven cooling directly causes problems such as wrinkles, thickness deviations, and decreased mechanical properties in the film. This defect is particularly pronounced in the production of ultra-thin films or functional composite films, severely impacting product yield. Utility Model Content

[0004] The purpose of this invention is to provide a cooling structure for film blow molding, which can uniformly cool the film and improve the cooling effect by setting an independent cooling structure.

[0005] The specific technical solution adopted by this utility model is as follows:

[0006] A cooling structure for thin film blow molding includes a cooling ring, a plurality of air outlets are provided on the inner side of the cooling ring, and a flow guiding component connected to the air outlets is provided on the inner side of the cooling ring.

[0007] The cooling ring has several through slots evenly distributed on its sidewall, and each through slot is equipped with a swinging component.

[0008] Furthermore, the airflow guiding assembly includes multiple annular tubes fixedly connected to the inner wall of the cooling ring, the multiple annular tubes being interconnected, and multiple flexible hoses being fixedly connected to the side walls of each annular tube, the other end of each flexible hose being connected to an air outlet.

[0009] Furthermore, the swing assembly includes a connecting plate movably connected in the through groove. The end of the connecting plate near the center of the cooling ring is fixedly connected to the air outlet. A pin is rotatably connected to the top surface of the connecting plate away from the air outlet. A rotating ring is rotatably connected to the side wall of the cooling ring. Several support plates are fixedly connected to the side wall of the rotating ring. Each support plate has a pin hole on its top surface. The pin is inserted into the pin hole. A rotation drive assembly is provided on the side wall of the cooling ring.

[0010] Furthermore, a rotating shaft is fixedly connected to the side wall of the through groove, and an elongated hole is provided at the center of the top surface of the connecting plate, with the rotating shaft movably connected to the elongated hole.

[0011] Furthermore, the rotating ring and the cooling ring are connected by a thread.

[0012] Furthermore, the rotary drive assembly includes a mounting plate fixedly connected to the side wall of the cooling ring, an electric push rod fixedly mounted on the side wall of the mounting plate, two fixed plates fixedly connected to the side wall of the rotating ring, a round shaft rotatably connected between the two fixed plates, a sleeve movably connected to the side wall of the round shaft, and the telescopic end of the electric push rod hinged to the sleeve.

[0013] Furthermore, the air outlets are arranged in a ring array.

[0014] The technical effects achieved by this utility model are as follows:

[0015] This utility model discloses a cooling structure for film blow molding. Through the cooperation of cooling ring, air outlet, and swing assembly, the angle of the air outlet can be adjusted synchronously according to the film diameter, so that the cooling airflow can uniformly cool the film around the periphery. This avoids problems such as wrinkles or damage caused by direct airflow blowing on the film, improves the cooling effect, and does not affect the yield of the film. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention;

[0017] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the rotating ring structure of this utility model;

[0019] Figure 4 This is a utility model Figure 1 Enlarged view of point A in the image;

[0020] Figure 5 This is a utility model Figure 2 Enlarged view of point B in the image;

[0021] Figure 6 This is a schematic diagram showing the distribution of the airflow direction of this utility model;

[0022] Where a represents a thin film.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Cooling ring; 2. Air outlet; 3. Annular pipe; 4. Hose; 5. Connecting plate; 6. Rotary ring; 7. Support plate; 8. Pin hole; 9. Pin shaft; 10. Rotary shaft; 11. Long hole; 12. Mounting plate; 13. Electric push rod; 14. Fixing plate; 15. Round shaft; 16. Sleeve. Detailed Implementation

[0025] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0026] like Figures 1-6 As shown, a cooling structure for thin film blow molding includes a cooling ring 1, a plurality of air outlets 2 are provided on the inner side of the cooling ring 1, and a flow guiding component connected to the air outlets 2 is provided on the inner side of the cooling ring 1.

[0027] The cooling ring 1 has several through slots evenly distributed on its side wall, and each through slot is equipped with a swing component.

[0028] like Figure 2 and Figure 5 As shown, the airflow guiding assembly includes multiple annular pipes 3 fixedly connected to the inner wall of the cooling ring 1. The multiple annular pipes 3 are interconnected. Multiple flexible hoses 4 are fixedly connected to the side walls of the annular pipes 3. The other end of each flexible hose 4 is connected to the air outlet 2.

[0029] One of the annular pipes 3 is connected to a quick connector, which is used to connect to an external fan and air supply equipment, so that the airflow can be ejected from multiple air outlets 2 through multiple annular pipes 3 respectively, so that the airflow forms a vortex state inside the cooling ring 1, which can achieve the purpose of uniform cooling and also make the airflow flow, increasing the contact surface between the airflow and the film.

[0030] like Figure 5 As shown, the swing assembly includes a connecting plate 5 movably connected in the through groove. The end of the connecting plate 5 near the center of the cooling ring 1 is fixedly connected to the air outlet 2. A pin 9 is rotatably connected to the top surface of the connecting plate 5 away from the air outlet 2. A rotating ring 6 is rotatably connected to the side wall of the cooling ring 1. Several support plates 7 are fixedly connected to the side wall of the rotating ring 6. A pin hole 8 is opened on the top surface of each support plate 7. The pin 9 is inserted into the pin hole 8. A rotation drive assembly is provided on the side wall of the cooling ring 1.

[0031] like Figure 5As shown, a rotating shaft 10 is fixedly connected to the side wall of the channel, and an elongated hole 11 is opened at the center of the top surface of the connecting plate 5. The rotating shaft 10 is movably connected to the elongated hole 11. Through the cooperation between the rotating shaft 10 and the elongated hole 11, on the one hand, the moving space of the connecting plate 5 can be increased and the motion interference can be reduced; on the other hand, the lever principle is used to facilitate the adjustment of the angle of the air outlet 2, so as to achieve the purpose of synchronous adjustment of multiple air outlets 2.

[0032] The rotating ring 6 and the cooling ring 1 are connected by threads.

[0033] like Figure 1 and Figure 4 As shown, the rotary drive assembly includes a mounting plate 12 fixedly connected to the side wall of the cooling ring 1. An electric push rod 13 is fixedly mounted on the side wall of the mounting plate 12. Two fixed plates 14 are fixedly connected to the side wall of the rotating ring 6. A round shaft 15 is rotatably connected between the two fixed plates 14. A sleeve 16 is movably connected to the side wall of the round shaft 15. The telescopic end of the electric push rod 13 is hinged to the sleeve 16.

[0034] Specifically, the side wall of the rotating ring 6 has multiple slots, and the mounting plate 12 is fixed in the slots. Since the cooling ring 1 and the rotating ring 6 are connected by threads, when the electric push rod 13 pushes the rotating ring 6 to rotate, the rotating ring 6 will have a small upward displacement tendency. The sleeve 16 can slide on the round shaft 15. Combined with the hinged movable connection, the displacement difference between the linear motion of the electric push rod 13 and the rotation and upward motion of the rotating ring 6 can be offset. Secondly, the connection between the electric push rod 13 and the sleeve 16 can also adopt a universal ball joint to further eliminate displacement interference.

[0035] The air outlets 2 are arranged in a ring array. This increases the uniformity of airflow and can adapt to the cooling of thin films with different diameters.

[0036] The working principle of this utility model is as follows: First, the device is installed on the upper side of the air ring, so that the film passes through the inner side of the cooling ring 1. Then, the angle of multiple air outlets 2 is adjusted according to the diameter of the film. The electric push rod 13 is started to push the rotating ring 6 to rotate. The rotating ring 6 drives one end of the connecting plate 5 to swing through the support plate 7. The other end of the connecting plate 5 swings in the opposite direction through the action of the rotating shaft 10, thereby driving the air outlets 2 to swing to a suitable angle, so that the airflow flows around the outside of the film, thereby increasing the cooling uniformity. At the same time, it can avoid damage and wrinkles caused by the airflow blowing directly on the surface of the film.

[0037] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A cooling structure for thin film blow molding, characterized in that: It includes a cooling ring (1), and a plurality of air outlets (2) are provided on the inner side of the cooling ring (1). A flow guiding component connected to the air outlets (2) is provided on the inner side of the cooling ring (1). The cooling ring (1) has several through slots evenly distributed on its sidewall, and each through slot is equipped with a swinging component.

2. The cooling structure for thin film blow molding according to claim 1, characterized in that: The airflow guiding assembly includes multiple annular tubes (3) fixedly connected to the inner wall of the cooling ring (1), the multiple annular tubes (3) are interconnected, and multiple flexible tubes (4) are fixedly connected to the side walls of each annular tube (3), the other end of each flexible tube (4) is connected to the air outlet (2).

3. The cooling structure for thin film blow molding according to claim 1, characterized in that: The swing assembly includes a connecting plate (5) movably connected in the through groove. The end of the connecting plate (5) near the center of the cooling ring (1) is fixedly connected to the air outlet (2). A pin (9) is rotatably connected to the top surface of the connecting plate (5) away from the air outlet (2). A rotating ring (6) is rotatably connected to the side wall of the cooling ring (1). Several support plates (7) are fixedly connected to the side wall of the rotating ring (6). A pin hole (8) is opened on the top surface of each support plate (7). The pin (9) is inserted into the pin hole (8). A rotation drive assembly is provided on the side wall of the cooling ring (1).

4. The cooling structure for thin film blow molding according to claim 3, characterized in that: A rotating shaft (10) is fixedly connected to the side wall of the through groove, and an elongated hole (11) is provided at the center of the top surface of the connecting plate (5). The rotating shaft (10) is movably connected to the elongated hole (11).

5. A cooling structure for thin film blow molding according to claim 3, characterized in that: The rotating ring (6) is threadedly connected to the cooling ring (1).

6. The cooling structure for thin film blow molding according to claim 3, characterized in that: The rotary drive assembly includes a mounting plate (12) fixedly connected to the side wall of the cooling ring (1), an electric push rod (13) fixedly mounted on the side wall of the mounting plate (12), two fixed plates (14) fixedly connected to the side wall of the rotating ring (6), a round shaft (15) rotatably connected between the two fixed plates (14), a sleeve (16) movably connected to the side wall of the round shaft (15), and the telescopic end of the electric push rod (13) hinged to the sleeve (16).

7. The cooling structure for thin film blow molding according to claim 1, characterized in that: The air outlets (2) are arranged in a ring array.

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