A blown film machine die head air ring mechanism

Abstract

This invention discloses an air ring mechanism for a blown film machine die head, relating to the field of blown film machine technology. It includes an annular air duct with an annular air outlet encircling the inner wall of the duct; two elastic shielding components, respectively disposed above and below the annular air outlet, forming an air duct structure between them; each elastic shielding component comprising multiple concentric rings connected by an elastic cloth between adjacent rings; multiple adaptive components for mounting the elastic shielding components to the inner wall of the annular air duct; and multiple sets of extrusion components, arranged in a ring on the inner wall of the annular air duct, with extrusion components distributed on the side of each elastic shielding component furthest from the annular air outlet. This invention can achieve various air duct configurations, such as expanding air ducts, flat air ducts, focusing air ducts, and upward guiding air ducts, meeting the film production needs of different materials and processes.

Description

Technical Field

[0001] This invention relates to the field of blown film machine technology, and more specifically to a blown film machine die head air ring mechanism. Background Technology

[0002] Film blowing machines are key equipment in the plastics processing industry for film production, and their die head air ring mechanism plays a crucial role in the film forming process. The air ring mechanism controls the cooling rate and shape of the molten plastic preform by blowing air onto the die head, thus affecting the film's thickness, uniformity, and physical properties. Existing film blowing machine die head air ring mechanisms typically employ a fixed or single-type airflow output design, and the form of the blown air (such as air pressure and direction) cannot be flexibly adjusted according to production needs. This design limitation makes it difficult for the air ring mechanism to adapt to the production requirements of films with different materials, thicknesses, and process requirements. For example, when producing high-transparency films, a uniform and stable airflow is required to ensure film surface quality; while producing thicker or special-performance films may require stronger air pressure or specific airflow distribution. Existing air ring mechanisms, lacking adjustment capabilities, struggle to meet these diverse production needs, leading to unstable film quality, low production efficiency, or material waste. Summary of the Invention

[0003] The purpose of this invention is to provide a blown film machine die head air ring mechanism, which solves the problem that existing blown film machine die head air ring mechanisms usually adopt a fixed or single form of airflow output design, and the form of the blown air cannot be flexibly adjusted according to production needs.

[0004] The present invention solves the above-mentioned technical problems through the following technical solutions, the present invention comprising:

[0005] A ring-shaped air duct, wherein the inner ring wall of the ring-shaped air duct has a ring-shaped air outlet that surrounds the entire circumference;

[0006] Two elastic shielding components are respectively disposed on the upper and lower sides of the annular air outlet, and an air duct structure is formed between the two elastic shielding components. Each elastic shielding component includes multiple concentric rings, and an elastic cloth is connected between two adjacent rings.

[0007] Multiple adaptive components, wherein the multiple adaptive components are used to install the elastic shielding component on the inner wall of the annular duct;

[0008] Multiple sets of extrusion components are installed in a ring on the inner wall of the annular air duct. Extrusion components are also distributed on the side of the two elastic shielding components away from the annular air outlet. When each set of extrusion components makes extrusion contact with the elastic shielding component, the air duct structure can be adjusted into the corresponding shape to achieve the adjustment of the air duct structure.

[0009] A driving component, which drives the corresponding extrusion component to make extrusion contact with the elastic shielding component.

[0010] Preferably, the adaptive component includes a first horizontal bar fixed to the inner wall of the annular duct, a plurality of vertical bars slidably mounted on the first horizontal bar, and the plurality of vertical bars are respectively fixed to a plurality of rings. A tension spring is fixed between the first horizontal bar and the rings, and the force of the tension spring pulls the rings away from the annular air outlet. A stop bar is fixed to the inner wall of the annular duct, and the stop bar is used to limit the maximum stroke of the rings moving away from the annular air outlet.

[0011] Preferably, the extrusion assembly includes a second crossbar fixed to the inner wall of the annular duct, a vertical moving frame slidably mounted on the second crossbar, a deformation push rod fixed on the side of the vertical moving frame near the elastic shielding assembly, the deformation push rod having multiple first slots adapted to multiple rings, a spring installed between the second crossbar and the vertical moving frame, when the deformation push rod presses into contact with the elastic shielding assembly, the elastic shielding assembly will adapt to the shape of the deformation push rod to adjust the duct structure.

[0012] Preferably, the deformable push rod includes an outward expansion structure, a horizontal structure, an inward expansion structure, and an upward guiding air duct. The outward expansion structure, the horizontal structure, the inward expansion structure, and the upward guiding air duct respectively adjust the air duct structure to an expanding air duct, a flat air duct, a focusing air duct, and an upward guiding air duct.

[0013] Preferably, a first retaining ring is fixed to the outer wall of the annular air outlet, a second retaining ring is fixed to the outer ring of the circular ring, and a second slot is opened at the outer end of the first slot. When the second retaining ring is in contact with the first retaining ring, a sealed connection between the annular air duct and the elastic shielding component is achieved.

[0014] Preferably, the upper and lower extrusion assemblies are connected by a linkage assembly to achieve synchronous operation. The linkage assembly includes a first slot that is slidably and sealed in the annular duct. A horizontal push block is fixed at the upper end of the first slot. A curved tube is fixed to the annular duct. The inner end of the curved tube passes through the annular duct and extends to be fixed to a second crossbar. Its outer end passes through the annular duct and extends into the annular inner cavity of the annular duct. A pull rope is fixed to the vertical moving frame of the lower extrusion assembly. The pull rope passes through the curved tube and is fixedly connected to the first slot.

[0015] Preferably, the driving assembly includes multiple extrusion parts and a power component for driving the extrusion parts to rotate circumferentially. The extrusion part includes a first motor and a flip plate fixed to the output end of the first motor. The middle position of the flip plate is connected to the output end of the first motor, and the two ends of the flip plate correspond to the corresponding horizontal push block and vertical shift frame, respectively.

[0016] Preferably, the power component includes an annular frame fixed to the upper end of the annular duct, a rotating ring horizontally rotatably mounted on the annular frame, a first motor mounted on the rotating ring, an external gear ring mounted on the rotating ring, a second motor fixed on the annular frame via a mounting base, and a gear meshing with the external gear ring fixed to the output end of the second motor.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. Through the synergistic effect of the elastic shielding component and the extrusion component, combined with deformation pushers of different structures, this invention can achieve various airflow configurations, such as expanding airflow, flat airflow, focusing airflow, and upward guiding airflow, to meet the film production needs of different materials and processes. Furthermore, the dynamic adjustment of the airflow structure ensures airflow uniformity and stability, effectively controlling the cooling rate and shape of the molten plastic preform, and improving the film's thickness uniformity, transparency, and surface quality.

[0019] 2. This invention, through precise control of adaptive and driving components, can quickly adjust the air duct shape according to production needs, adapting to various thin-film production scenarios and improving the versatility and flexibility of the equipment. Furthermore, the adjustable air duct structure reduces production interruptions and debugging time caused by airflow mismatch, significantly improving production efficiency.

[0020] 3. The fitting design of the first and second baffle rings ensures a sealed connection between the annular duct and the elastic shielding assembly, preventing airflow leakage and improving airflow utilization efficiency.

[0021] 4. The cooperation between the extrusion component and the linkage component enables the synchronous deformation of the upper and lower elastic blocking components, reducing the number of drive mechanisms, simplifying the overall structural design, and reducing manufacturing and maintenance costs. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 A three-dimensional structural diagram showing the removal of the driving components;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the driving component;

[0025] Figure 4 A three-dimensional structural diagram of the elastic shading component and the adaptive component;

[0026] Figure 5 A three-dimensional structural diagram of the elastic shielding component and the extrusion component;

[0027] Figure 6 for Figure 2 Enlarged structural diagram at point A in the middle;

[0028] Figure 7 This is a schematic diagram of the first form of the elastic shielding component in this invention;

[0029] Figure 8 This is a schematic diagram of the second form of the elastic shielding component in this invention;

[0030] Figure 9 This is a schematic diagram of the third form of the elastic shielding component in this invention;

[0031] Figure 10 This is a schematic diagram of the fourth form of the elastic shielding component in this invention.

[0032] The numbers in the diagram represent:

[0033] 1-Annular duct; 11-Pipe connector; 12-Annular inner cavity; 13-Annular air outlet; 2-Elastic shielding assembly; 21-Circular ring; 22-Elastic cloth; 23-First retaining ring; 24-Second retaining ring; 25-Second slot; 3-Adaptive assembly; 31-Blocking rod; 32-Tension spring; 33-First horizontal bar; 34-Vertical bar; 4-Extrusion assembly; 41-Second horizontal bar; 42-Vertical moving frame; 43-Spring; 44-Deformation push rod; 45-First slot; 46-Horizontal push block; 47-Curved tube; 48-Pull rope; 5-Drive assembly; 51-Annular frame; 52-Rotating ring; 53-First motor; 54-Flipping plate; 55-External gear ring; 56-Second motor; 57-Gear. Detailed Implementation

[0034] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0035] This embodiment provides a technical solution: a blown film machine die head air ring mechanism, such as... Figure 1-10 As shown, the device includes an annular duct 1, two elastic shielding components 2, multiple adaptive components 3, multiple extrusion components 4, and a drive component 5, all mounted on the annular duct 1. The annular duct 1, as the main body of the device, needs to be fixed to the die head of the blown film machine, and multiple fixing plates are provided around it. In addition, a pipe joint 11 is provided around the annular duct 1, which is connected to an external air pump or air compressor to provide continuous compressed air to the annular inner cavity 12 of the annular duct 1. The inner wall of the annular duct 1 has an annular air outlet 13 that surrounds the annular cavity 12. The annular air outlet 13 is connected to the annular inner cavity 12, and the compressed air entering the annular duct 1 will eventually be discharged through the annular air outlet 13.

[0036] Two elastic shielding components 2 are respectively disposed on the upper and lower sides of the annular air outlet 13, and the two elastic shielding components 2 are symmetrically arranged vertically. The airflow discharged from the annular air outlet 13 will be discharged through the air duct structure formed between the two elastic shielding components 2, thereby adjusting the air duct structure by adjusting its own shape. The elastic shielding component 2 includes multiple concentric rings 21, and an elastic cloth 22 is connected between two adjacent rings 21. It should be noted that the number of rings 21 can be set as needed, and when not squeezed by the squeezing component 4, the multiple rings 21 are located on the same horizontal plane. The elastic cloth 22 is an annular structure used to seal the gap between two adjacent rings 21. The elastic cloth 22 has a certain tensile deformation performance.

[0037] The flexible shielding component 2 is installed on the inner wall of the annular duct 1 via adaptive components 3. It is important to note that the adaptive components 3 used to install the upper and lower flexible shielding components 2 are symmetrically arranged vertically. The number of adaptive components 3 is set according to needs, and multiple adaptive components 3 are evenly distributed around the inner ring of the annular duct 1 to ensure uniform force distribution during the installation of the flexible shielding components 2. Specifically, the adaptive component 3 includes a first horizontal bar 33 fixed to the inner wall of the annular duct 1, with multiple vertical bars 34 slidably mounted on the first horizontal bar 33. The quantity corresponds to the number of multiple rings 21, and multiple vertical rods 34 are fixed to multiple rings 21 respectively. The vertical rods 34 can ensure that each ring 21 is vertically displaced. A tension spring 32 is fixed between the first horizontal rod 33 and the ring 21. The force of the tension spring 32 pulls the ring 21 away from the annular air outlet 13. A baffle 31 is fixed on the inner wall of the annular air duct 1. The baffle 31 is used to limit the maximum stroke of the ring 21 to the side away from the annular air outlet 13. Due to the force of multiple tension springs 32, multiple rings 21 are located on the same horizontal plane during operation.

[0038] Multiple sets of extrusion components 4 are installed in a ring on the inner wall of the annular air duct 1. Extrusion components 4 are distributed on the side of the two elastic shielding components 2 away from the annular air outlet 13. When each set of extrusion components 4 extrudes and contacts the elastic shielding component 2, the elastic shielding component 2 can be adjusted into the corresponding shape to adjust the air duct structure.

[0039] The extrusion assembly 4 includes a second horizontal bar 41 fixed to the inner wall of the annular duct 1. A vertical shifting frame 42 is slidably mounted on the second horizontal bar 41. A deformation push rod 44 is fixed on the side of the vertical shifting frame 42 near the elastic shielding assembly 2. The deformation push rod 44 is a component that contacts the ring 21. The deformation push rod 44 has multiple first slots 45 that are adapted to the multiple rings 21. When the deformation push rod 44 approaches the elastic shielding assembly 2, the deformation push rod 44 engages with the corresponding first slot 45 to ensure the stability of the vertical displacement of the ring 21. A spring 43 is installed between the second horizontal bar 41 and the vertical shifting frame 42. The spring 43 applies a force to the side of the vertical shifting frame 42 away from the elastic shielding assembly 2. When the deformation push rod 44 presses against the elastic shielding assembly 2, the vertical position of the ring 21 remains unchanged, while the elastic cloth 22 will adaptively stretch and deform, so that the elastic shielding assembly 2 can adapt to the deformation according to the shape of the deformation push rod 44 to adjust the duct structure.

[0040] The deformation push rod 44 in each group has a different structure. The deformation push rod 44 includes an outward expansion structure, a horizontal structure, an inward expansion structure, and an upward guiding air duct. The outward expansion structure, the horizontal structure, the inward expansion structure, and the upward guiding air duct adjust the air duct structure to an expansion air duct, a flat air duct, a focusing air duct, and an upward guiding air duct, respectively.

[0041] The opening of the expansion duct widens outwards, allowing airflow to exit in a more gradual manner (see reference). Figure 7 It is suitable for the following scenarios: 1. Production of high transparency films or thin-walled films, such as packaging films or optical films; 2. Suitable for scenarios that require uniform cooling to avoid defects on the film surface caused by excessive airflow concentration; 3. Suitable for materials with low requirements for cooling speed, such as low-density polyethylene films.

[0042] The benefits of using an expanded air duct are: 1. The airflow intensity of a flat air duct is moderate, which is suitable for various film production processes and enhances the versatility of the equipment; 2. The uniform airflow distribution ensures consistent cooling of the tube blank, maintains uniform film thickness, and reduces thickness deviation; 3. The moderate airflow intensity reduces commissioning time, is suitable for mass production, and shortens the production cycle.

[0043] The flat air duct maintains a horizontal shape, and the airflow is discharged at a moderate intensity and uniformly (reference). Figure 8 It is suitable for the following scenarios: 1. Suitable for producing medium-thickness and conventional performance films, such as general packaging films or industrial films; 2. Suitable for scenarios that require a balance between cooling rate and airflow stability, taking into account both film thickness and quality; 3. Suitable for a variety of general-purpose materials, such as high-density polyethylene or linear low-density polyethylene.

[0044] The advantages of using flat air ducts are: 1. The airflow intensity of flat air ducts is moderate, which is suitable for various film production processes and enhances the versatility of the equipment; 2. The uniform airflow distribution ensures consistent cooling of the tube blank, maintains uniform film thickness, and reduces thickness deviation; 3. The moderate airflow intensity reduces the commissioning time, is suitable for mass production, and shortens the production cycle.

[0045] The opening of the focusing air duct narrows inward, and the airflow is discharged in a more rapid and concentrated manner (reference). Figure 9 It is suitable for the following scenarios: 1. Production of thicker or higher-strength films, such as heavy-duty packaging films or agricultural films; 2. Suitable for scenarios requiring rapid cooling to improve the mechanical properties of the film or speed up the molding process; 3. High-viscosity or high-melting-point materials, such as polypropylene.

[0046] The benefits of using focused air ducts are: 1. Enhanced film strength: Concentrated airflow provides higher cooling efficiency, promotes rapid curing of the preform, and improves the tensile strength and toughness of the film; 2. Rapid cooling shortens molding time, suitable for high-efficiency production needs, and reduces energy consumption; 3. Precise airflow control reduces film defects caused by uneven cooling and lowers the scrap rate.

[0047] The opening of the upward-guiding air duct is tilted upwards, guiding the airflow upwards for discharge (reference). Figure 10 It is suitable for the following scenarios: 1. Production of films with special shapes or structures, such as films that require a specific forming direction or multilayer co-extruded films; 2. Scenarios that require adjustment of airflow direction, such as guiding the preform upward or avoiding airflow interference with other components during blown film production; 3. Certain high-precision processes, such as functional films or films that require a specific cooling path.

[0048] The benefits of using upward-guided air ducts are: 1. The upward-guided airflow can precisely control the expansion direction of the tube blank, meet special process requirements, and improve the accuracy of the film structure; 2. It is suitable for complex production environments, avoids interference between airflow and other equipment components, and improves the stability of equipment operation; 3. It supports the production of special films, broadens the application range, and meets customized needs.

[0049] Furthermore, a first retaining ring 23 is fixed to the outer wall of the annular air outlet 13. The outer ring of the circular ring 21 has an outwardly extending portion. A second retaining ring 24 is fixed to the outer ring of the circular ring 21. The outer diameter of the second retaining ring 24 is adapted to the inner diameter of the annular air duct 1. Therefore, the second retaining ring 24 can be stably fitted onto the inner wall of the annular air duct 1. A second retaining groove 25 is opened at the outer end of the first groove 45. When the deformation push rod 44 presses the elastic shielding component 2 to the corresponding position, the deformation push rod 44 will also press the second retaining ring 24 and make the first retaining ring 23 fit with the second retaining ring 24 to achieve a sealed connection between the annular air duct 1 and the elastic shielding component 2. In order to ensure the sealing performance, the first retaining ring 23 and the second retaining ring 24 can be fitted together by a concave-convex structure.

[0050] The upper and lower extrusion components 4 are connected by a linkage component to achieve synchronous operation, simultaneously extruding the two elastic shielding components 2. The linkage component includes a first slot 45 that is slidably and sealed in the annular duct 1. A horizontal push block 46 is fixed at the upper end of the first slot 45. The horizontal push block 46 extends inward toward the annular duct 1. A curved tube 47 is fixed to the annular duct 1. The inner end of the curved tube 47 passes through the annular duct 1 and extends to be fixed to the second crossbar 41. Its outer end passes through the annular duct 1 and extends into the annular inner cavity 12 of the annular duct 1. The extrusion assembly located on the lower side... The vertical moving frame 42 of component 4 is fixed with a pull rope 48. The pull rope 48 passes through the curved tube 47 and is fixedly connected to the first slot 45. The curved tube 47 is used to guide the pull rope 48, and at the same time, the curved tube 47 also supports the first slot 45. When the first slot 45 is vertically displaced, it can pull the vertical moving frame 42 of the lower extrusion component 4 to move, so that the vertical moving frame 42 and the deformation push rod 44 in the upper and lower extrusion components 4 can move synchronously to one side of the annular air outlet 13, thereby synchronously pushing the two elastic shielding components 2 to move and deform to one side of the annular air outlet 13.

[0051] The driving component 5 is used to drive the corresponding extrusion component 4 to make extrusion contact with the elastic shielding component 2. The driving component 5 includes multiple extrusion components and a power component that drives the extrusion components to rotate circumferentially. The number of multiple extrusion components is the same as the number of extrusion components 4 in each group of extrusion components 4. The extrusion component includes a first motor 53 and a flip plate 54 fixed to the output end of the first motor 53. The middle position of the flip plate 54 is connected to the output end of the first motor 53. The two ends of the flip plate 54 correspond to the corresponding horizontal push block 46 and vertical shift frame 42, respectively.

[0052] When multiple extrusion components are driven by a power component to correspond one-to-one with the extrusion components 4 in each group of extrusion components 4, the first motor 53 is operated, which drives the flipping plate 54 to flip. The outer end of the flipping plate 54 contacts the horizontal push block 46, and the inner end of the flipping plate 54 contacts the vertical moving frame 42. Therefore, the flipping plate 54 pushes the vertical moving frame 42 upward and pushes the horizontal push block 46 upward. The first slot 45 will move upward, and then the lower vertical moving frame 42 will be pulled upward by the pull rope 48. This will realize the simultaneous movement of the vertical moving frames 42 in the two extrusion components 4 towards one side of the annular air outlet 13. Furthermore, the deformation push rods 44 in the two extrusion components 4 will move the two elastic shielding components 2 downward to one side of the annular air outlet 13, and the two elastic shielding components 2 will be extruded into corresponding structures to form different air ducts.

[0053] The power unit includes an annular frame 51 fixed to the upper end of the annular duct 1, a rotating ring 52 horizontally rotatably mounted on the annular frame 51, a first motor 53 mounted on the rotating ring 52, an external gear ring 55 mounted on the rotating ring 52, a second motor 56 fixed on the annular frame 51 by a mounting seat, and a gear 57 that meshes with the external gear ring 55 fixed at the output end of the second motor 56.

[0054] The second motor 56 is operated, and the rotating ring 52 is driven to rotate through the cooperation of the gear 57 and the external gear ring 55, thereby driving multiple extrusion parts to rotate horizontally.

[0055] The above description is merely a preferred embodiment of the present invention and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, all of which will fall within the protection scope of the present invention.

Claims

1. A blown film machine die head air ring mechanism, characterized in that, It includes an annular duct (1), the inner annular wall of which has an annular air outlet (13) that surrounds the entire circumference. Two elastic shielding components (2) are respectively disposed on the upper and lower sides of the annular air outlet (13). An air duct structure is formed between the two elastic shielding components (2). The elastic shielding component (2) includes multiple concentric rings (21), and an elastic cloth (22) is connected between two adjacent rings (21). Multiple adaptive components (3) are used to install the elastic shielding component (2) on the inner wall of the annular duct (1); Multiple sets of extrusion components (4) are installed in a ring on the inner wall of the annular air duct (1), and extrusion components (4) are distributed on the side of the two elastic shielding components (2) away from the annular air outlet (13). When each set of extrusion components (4) makes extrusion contact with the elastic shielding component (2), the air duct structure can be adjusted to the corresponding shape to achieve the adjustment of the air duct structure. The driving component (5) is used to drive the corresponding extrusion component (4) to make extrusion contact with the elastic shielding component (2); The adaptive component (3) includes a first horizontal bar (33) fixed to the inner wall of the annular duct (1), a plurality of vertical bars (34) are slidably mounted on the first horizontal bar (33), and the plurality of vertical bars (34) are respectively fixed to a plurality of rings (21). A tension spring (32) is fixed between the first horizontal bar (33) and the rings (21). The force of the tension spring (32) pulls the rings (21) away from the annular air outlet (13). A stop bar (31) is fixed to the inner wall of the annular duct (1). The stop bar (31) is used to limit the maximum stroke of the rings (21) away from the annular air outlet (13). The extrusion assembly (4) includes a second crossbar (41) fixed to the inner wall of the annular duct (1). A vertical moving frame (42) is slidably mounted on the second crossbar (41). A deformation push rod (44) is fixed on the side of the vertical moving frame (42) near the elastic shielding assembly (2). A plurality of first slots (45) adapted to a plurality of rings (21) are provided on the deformation push rod (44). A spring (43) is installed between the second crossbar (41) and the vertical moving frame (42). When the deformation push rod (44) presses against the elastic shielding assembly (2), the elastic shielding assembly (2) will adapt to the shape of the deformation push rod (44) to adjust the duct structure. The deformable push rod (44) includes an outward expansion structure, a horizontal structure, an inward expansion structure, and an upward guiding air duct. The outward expansion structure, the horizontal structure, the inward expansion structure, and the upward guiding air duct adjust the air duct structure to an expansion air duct, a flat air duct, a focusing air duct, and an upward guiding air duct, respectively.

2. The blown film machine die head air ring mechanism as described in claim 1, characterized in that, The outer edge of the annular air outlet (13) is fixed with a first retaining ring (23), and the outer ring of the circular ring (21) is fixed with a second retaining ring (24). The outer end of the first slot (45) is provided with a second slot (25). When the second retaining ring (24) and the first retaining ring (23) are in contact, a sealed connection between the annular air duct (1) and the elastic shielding assembly (2) is achieved.

3. The blown film machine die head air ring mechanism as described in claim 1, characterized in that, The two extrusion components (4) are connected by a linkage component to achieve synchronous operation. The linkage component includes a first slot (45) that is slidably and sealed in the annular duct (1). A horizontal push block (46) is fixed at the upper end of the first slot (45). A curved tube (47) is fixed in the annular duct (1). The inner end of the curved tube (47) passes through the annular duct (1) and extends to be fixed to the second crossbar (41). Its outer end passes through the annular duct (1) and extends into the annular cavity (12) of the annular duct (1). A pull rope (48) is fixed on the vertical moving frame (42) of the extrusion component (4) located on the lower side. The pull rope (48) passes through the curved tube (47) and is fixedly connected to the first slot (45).

4. The blown film machine die head air ring mechanism as described in claim 3, characterized in that, The drive assembly (5) includes multiple extrusion parts and a power component for driving the extrusion parts to rotate in a circular motion. The extrusion part includes a first motor (53) and a flip plate (54) fixed to the output end of the first motor (53). The middle part of the flip plate (54) is connected to the output end of the first motor (53), and the two ends of the flip plate (54) correspond to the corresponding horizontal push block (46) and vertical shift frame (42) respectively.

5. The blown film machine die head air ring mechanism as described in claim 4, characterized in that, The power component includes an annular frame (51) fixed to the upper end of the annular duct (1), a rotating ring (52) is horizontally rotatably mounted on the annular frame (51), and the first motor (53) is mounted on the rotating ring (52). An external gear ring (55) is mounted on the rotating ring (52). A second motor (56) is fixed on the annular frame (51) by a mounting seat. A gear (57) that meshes with the external gear ring (55) is fixed at the output end of the second motor (56).

Images