Cooling device for die head of film blowing machine

Abstract

The utility model discloses a cooling device for a die head of a film blowing machine, and belongs to the technical field of PLA (polylactic acid) high-transparency films. An air ring assembly is installed at one end of the fan and comprises an air ring body, a first air channel and a second air channel are formed in the upper end and the lower end of the inner side wall of the air ring body respectively, installation grooves are formed in the first air channel and the second air channel in a penetrating mode, telescopic rods are installed on the bottom faces of the inner walls of the installation grooves, and connecting rods are installed at the top ends of the telescopic rods. A first flow dividing ring is welded to the middle of the connecting rod, an adjusting screw rod is connected to the first flow dividing ring in a penetrating and threaded mode, a second flow dividing ring is connected to the adjusting screw rod in a threaded mode, and the second flow dividing ring surrounds the first flow dividing ring in a concentric ring shape. Through cooperation of the air ring assembly, the first shunting ring, the adjusting screw rod and the second shunting ring, the gap between the upper shunting ring and the lower shunting ring can be independently adjusted through the adjusting screw rod, layered and regional flow control over cooling airflow in different regions of film bubbles is achieved, and the film cooling uniformity and the production process stability are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of PLA high transparency film technology, specifically a blown film machine die head cooling device. Background Technology

[0002] PLA, as a biodegradable material, has wide applications in food packaging, medical supplies and other fields due to its high transparency films. However, the thermal sensitivity and processing characteristics of PLA material place special requirements on the cooling device of the blown film machine die head. The design of the cooling device needs to take into account airflow stability, temperature control accuracy and maintenance convenience in order to meet the stringent requirements of PLA material for the processing environment and ensure the high transparency, mechanical properties and biodegradability of the final film product.

[0003] Existing cooling devices use a single air duct structure, with airflow output through a single annular gap. This results in low flexibility in airflow adjustment and makes it difficult to adapt to diverse blown film process requirements. Utility Model Content

[0004] The purpose of this invention is to provide a cooling device for the die head of a blown film machine. Through the cooperation of the air ring assembly, the first flow divider ring, the adjusting screw and the second flow divider ring, the gap between the upper and lower flow divider rings can be independently adjusted by adjusting the adjusting screw, so as to achieve layered and regional flow control of cooling airflow in different areas of the film bubble, effectively improving the uniformity of film cooling and the stability of the production process, and meeting the differentiated cooling intensity requirements of different blown film processes.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model relates to a cooling device for the die head of a blown film machine, comprising a fan, an air ring assembly installed at one end of the fan, the air ring assembly comprising an air ring body, a first air duct and a second air duct respectively opened at the upper and lower ends of the inner side wall of the air ring body, an installation groove through which both the first air duct and the second air duct are opened, a telescopic rod is installed on the bottom surface of the inner wall of the installation groove, a connecting rod is installed at the top of the telescopic rod, a first diverting ring is welded to the middle of the connecting rod, an adjusting screw is threaded through the first diverting ring, a second diverting ring is threaded through the adjusting screw, and the second diverting ring is concentrically arranged around the outside of the first diverting ring.

[0007] Furthermore, one end of the fan is connected to a duct, and an inlet hole is opened through one side of the air ring body. The duct is connected to the inlet hole through a flange.

[0008] Furthermore, the wind ring body is a cylindrical shape with openings at both the top and bottom. The first and second air ducts are distributed in a ring-like manner on the inner wall of the wind ring body. The first and second air ducts are provided with mounting slots on opposite sides. There are four mounting slots and four telescopic rods. The two mounting slots on the first and second air ducts are distributed in a cross shape, and the four telescopic rods are arranged in a cross shape inside the four second air ducts.

[0009] Furthermore, the bottom end of the telescopic rod is vertically set on the bottom surface of the inner wall of the mounting groove, and the two ends of the connecting rod are respectively welded to the top of the two telescopic rods. There are two connecting rods, two first diverting rings and two adjusting screws. The two connecting rods are arranged in a cross shape at the upper and lower ends of the wind ring body.

[0010] Furthermore, both the first and second diverter rings are circular, with the diameter of the second diverter ring being larger than that of the first diverter ring. Threaded holes are provided at corresponding positions on both the first and second diverter rings. One end of the adjusting screw extends through the threaded holes on the first and second diverter rings and is positioned outside the second diverter ring. The top surface of the second diverter ring abuts against the bottom surface of the connecting rod.

[0011] This utility model has the following beneficial effects:

[0012] This invention, through the cooperation of the air ring assembly, the first flow divider ring, the adjusting screw, and the second flow divider ring, allows for independent adjustment of the gap between the upper and lower flow divider rings via the adjusting screw. This enables layered and regional flow control of the cooling airflow in different areas of the film bubble, effectively improving the uniformity of film cooling and the stability of the production process, and meeting the differentiated cooling intensity requirements of different blown film processes.

[0013] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the cooling device.

[0015] Figure 2 This is a schematic diagram of the internal structure of the cooling device;

[0016] Figure 3 This is a structural schematic diagram of the telescopic rod, connecting rod, first flow divider ring, adjusting screw, and second flow divider ring.

[0017] Figure 4 This is a schematic diagram of the air ring assembly.

[0018] In the diagram: 1. Fan; 2. Air ring assembly; 201. Air ring body; 202. First air duct; 203. Second air duct; 204. Mounting slot; 3. Telescopic rod; 4. Connecting rod; 5. First diverting ring; 6. Adjusting screw; 7. Second diverting ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4This utility model provides a technical solution: a blown film machine die head cooling device, including a fan 1, which provides cooling airflow power for the entire system. A wind ring assembly 2 is installed at one end of the fan 1, and a duct is connected to the other end of the fan 1. An input hole is opened through one side of the wind ring body 201, and the duct is connected to the input hole via a flange to ensure stable airflow input. The wind ring assembly 2 includes a wind ring body 201, with a first air duct 202 and a second air duct 203 respectively opened at the upper and lower ends of the inner wall of the wind ring body 201. A mounting groove 204 is opened through both the first air duct 202 and the second air duct 203, and a telescopic rod 3 is installed on the bottom surface of the inner wall of the mounting groove 204. The wind ring body 201 is a cylindrical shape with openings at both the upper and lower ends. The first air duct 202... The first air duct 202 and the second air duct 203 are arranged in a ring-like pattern on the inner wall of the air ring body 201. Both the first air duct 202 and the second air duct 203 are evenly arranged in the circumferential direction to provide channels for the layered flow of cooling air. The first air duct 202 and the second air duct 203 are provided with mounting slots 204 through each other on opposite sides. The first air duct 202 and the second air duct 203 are connected to the diversion ring structure through telescopic rods 3 and connecting rods 4 at the upper and lower ends, respectively, forming a layered airflow regulation system. There are four mounting slots 204 and four telescopic rods 3. The two mounting slots 204 on the first air duct 202 and the second air duct 203 are arranged in a cross shape. The four telescopic rods 3 are arranged in a cross shape inside the four second air ducts 203. The top of the telescopic rods 3 is installed with... Equipped with a connecting rod 4, the connecting rod 4 can be moved to a specified height by the extension and retraction of the telescopic rod 3, thereby facilitating the position adjustment and cleaning / maintenance of the first diverter ring 5 and the second diverter ring 7. The first diverter ring 5 is welded to the middle of the connecting rod 4 and is located in the central area of ​​the air ring body 201. An adjusting screw 6 is threaded through the first diverter ring 5. The bottom end of the telescopic rod 3 is vertically set on the bottom surface of the inner wall of the mounting groove 204. The two ends of the connecting rod 4 are respectively welded to the top of the two telescopic rods 3. There are two connecting rods 4, two first diverter rings 5, and two adjusting screws 6. The two connecting rods 4 are arranged in a cross shape at the upper and lower ends of the air ring body 201. The second diverter ring 7 is threaded through the adjusting screw 6 and is arranged in a concentric ring shape. Outside the first flow divider ring 5, both the first flow divider ring 5 and the second flow divider ring 7 are annular in shape. The diameter of the second flow divider ring 7 is larger than that of the first flow divider ring 5. Threaded holes are provided at corresponding positions on both the first flow divider ring 5 and the second flow divider ring 7. One end of the adjusting screw 6 extends through the threaded holes on both the first flow divider ring 5 and the second flow divider ring 7, extending outside the second flow divider ring 7. The top surface of the second flow divider ring 7 abuts against the bottom surface of the connecting rod 4. The relative position of the first flow divider ring 5 and the second flow divider ring 7 is adjusted by rotating the adjusting screw 6. When the adjusting screw 6 is rotated, the second flow divider ring 7 can move closer to or further away from the first flow divider ring 5 in the radial direction, thereby changing the size of the annular gap between them and controlling the flow rate of cooling air through this gap.The upper first air duct 202 and the lower second air duct 203 can be independently adjusted in terms of airflow channel gap through corresponding flow divider ring components. This allows the cooling airflow to be controlled in layers and regions according to the cooling needs of different areas of the membrane bubble, improving the uniformity of film cooling and production stability. During film blowing, an external power supply is first connected to the electrical equipment in this device. The fan 1 and telescopic rod 3 mentioned above are existing technologies and will not be described in detail further.

[0021] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A blown film machine die head cooling device, comprising a fan (1), characterized in that: The fan (1) is equipped with a wind ring assembly (2) at one end. The wind ring assembly (2) includes a wind ring body (201). The upper and lower ends of the inner sidewall of the wind ring body (201) are respectively provided with a first air duct (202) and a second air duct (203). The first air duct (202) and the second air duct (203) are both provided with a mounting groove (204). The bottom surface of the inner wall of the mounting groove (204) is provided with a telescopic rod (3). The top end of the telescopic rod (3) is provided with a connecting rod (4). The middle part of the connecting rod (4) is welded with a first diverting ring (5). The first diverting ring (5) is threadedly connected with an adjusting screw (6). The adjusting screw (6) is threadedly connected with a second diverting ring (7). The second diverting ring (7) is arranged in a concentric ring shape around the outside of the first diverting ring (5).

2. The blown film machine die head cooling device according to claim 1, characterized in that, One end of the fan (1) is connected to a duct, and an input hole is provided through one side of the air ring body (201), and the duct is connected to the input hole through a flange.

3. The blown film machine die head cooling device according to claim 1, characterized in that, The air ring body (201) is a cylindrical shape with openings at both the top and bottom. The first air duct (202) and the second air duct (203) are distributed in a ring shape on the inner side wall of the air ring body (201). The first air duct (202) and the second air duct (203) are provided with mounting grooves (204) on opposite sides. There are four mounting grooves (204) and four telescopic rods (3). The two mounting grooves (204) on the first air duct (202) and the second air duct (203) are arranged in a cross shape. The four telescopic rods (3) are arranged in a cross shape inside the four second air ducts (203).

4. A blown film machine die head cooling device according to claim 3, characterized in that, The bottom end of the telescopic rod (3) is vertically set on the bottom surface of the inner wall of the mounting groove (204). The two ends of the connecting rod (4) are respectively welded to the top of the two telescopic rods (3). There are two connecting rods (4), two first diverting rings (5) and two adjusting screws (6). The two connecting rods (4) are arranged in a cross shape at the upper and lower ends of the wind ring body (201).

5. A blown film machine die head cooling device according to claim 4, characterized in that, The first diverter ring (5) and the second diverter ring (7) are both circular rings. The diameter of the second diverter ring (7) is larger than the diameter of the first diverter ring (5). Threaded holes are provided at corresponding positions on the first diverter ring (5) and the second diverter ring (7). One end of the adjusting screw (6) extends through the threaded holes on the first diverter ring (5) and the second diverter ring (7) and extends to the outside of the second diverter ring (7). The top surface of the second diverter ring (7) abuts against the bottom surface of the connecting rod (4).

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