A fixed intake die head rotary film blowing machine

Abstract

The application relates to the technical field of film blowing machines, in particular to a fixed-air-inlet die rotating type film blowing machine, which comprises a feeding device and an extruding device, the extruding device comprises rotating die head assemblies and rotating driving support assemblies which are distributed upwards and downwards; the rotating die head assemblies comprise spiral distribution core shafts and die head outer cylinders which are distributed inside and outside, air passages which are penetrated upwards are arranged in the spiral distribution core shafts, and bottom plates which are fixed to the lower sides of the die head outer cylinders are integrally formed at the lower ends of the spiral distribution core shafts; the fixedly-installed air inlet bases and the air outlet bases which are rotationally connected in the air inlet bases realize the technical effect of continuously and stably supplying air, external air supply components do not need to be regularly disassembled in the production process, the production operation process is greatly simplified, and product quality is guaranteed; the extruding device is installed above the first air blower, vertical space is fully utilized, the integrated layout greatly reduces the horizontal land occupation area of the equipment, and the space utilization rate of a production workshop is improved.

Description

Technical Field

[0001] This invention relates to the field of blown film machine technology, and more particularly to a fixed air intake die-rotating blown film machine. Background Technology

[0002] A blown film machine is a device for producing tubular films. Its working principle is as follows: thermoplastic granules are heated and melted, and then extruded into tubular film preforms through the die head. Compressed air is then used to blow them into films of a set thickness.

[0003] Currently, blown film machines are generally divided into two categories: die-head rotary blown film machines and top-traction rotary blown film machines. Among them, the die-head rotary blown film machine keeps the die head rotating, thereby ensuring the flatness and quality of the finished film. Moreover, it has a significant advantage in equipment manufacturing cost compared to the top-traction rotary blown film machine.

[0004] However, in actual use, the existing air supply system in the rotary blown film machine has obvious technical defects: the air used to inflate the film extruded from the die head will inevitably leak slowly, resulting in insufficient pressure inside the film bubble. Therefore, it is necessary to periodically introduce air into the central air channel of the rotating die head. Currently, the air supply hole connected to the central air channel inside the die head rotates with the die head. In order to prevent the external air supply component from interfering with other components inside the blown film machine, the external air supply component needs to be removed after the air replenishment is completed, which is quite cumbersome. Therefore, it needs to be improved. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a fixed air intake die-rotating blown film machine to solve the above problems.

[0006] To achieve the above objectives, the present invention provides a fixed air intake rotary blown film machine, including a feeding device and an extrusion device, wherein the extrusion device includes a vertically distributed rotary die head assembly and a rotary drive support assembly.

[0007] The rotating head assembly includes a spiral flow divider mandrel and a die head outer cylinder distributed inside and outside. The spiral flow divider mandrel is provided with an upwardly penetrating air passage. The lower end of the spiral flow divider mandrel is integrally formed with a chassis fixed to the lower side of the die head outer cylinder.

[0008] The rotary drive support assembly includes a connecting seat, which is downwardly connected to the feeding device. A fixed shell is fixedly provided outside the connecting seat, and a rotating seat is rotatably connected inside the fixed shell. The rotating seat and the flow channel inside the connecting seat are interconnected. The rotating seat and the spiral diverting spindle are also connected by an intermediate shaft for material transfer. The assembly also includes a fixed plate, which is equipped with a power source for driving the rotating seat to rotate and driving the rotary head assembly to rotate through the intermediate shaft. An air inlet is also fixedly provided on the fixed plate. An air outlet is rotatably connected to the air inlet in the lower end of the chassis. The air outlet in the air outlet, which rotates with the air inlet, is connected to the air inlet in the air inlet in a fixed direction and is connected to the chassis through an air pipe to connect to the air passage.

[0009] Preferably, the inner curved surface of the air inlet seat is integrally formed with a convex ring, the inner curved surface of the convex ring presses against the outer curved surface of the air outlet seat, and an annular groove is also provided in the inner curved surface of the convex ring. The air inlet is connected to the annular groove, and an L-shaped transfer groove is provided in the air outlet seat. The transverse portion of the transfer groove extends outward through the air outlet seat and is at the same height as the annular groove to form ventilation. The air outlet is connected to the upper edge of the transfer groove.

[0010] Preferably, a support plate is also fixed to the upper end of the fixed shell, and the power source is a rotary motor fixed to the support plate. The output shaft inside the rotary motor and the rotating seat are respectively provided with a meshing gear.

[0011] The support plate is connected to the fixed plate via a first vertical plate.

[0012] Preferably, the rotary head assembly further includes a central cover and a discharge mold distributed internally and externally. The central cover is fixed on the spiral diverter spindle, and the discharge mold is fixed on the outer cylinder of the die head. There is an inverted conical discharge gap between the central cover and the discharge mold, and the central cover is provided with an air inlet that runs vertically through and connects to the air passage.

[0013] Preferably, the outer circumferential surface of the spiral flow divider is provided with multiple spiral channels at equal angles, and the groove depth of the spiral channels gradually decreases in the upward direction;

[0014] The outer diameter of the spiral flow divider gradually decreases in the upward direction, so that the material distribution gap formed between it and the inner wall of the outer cylinder of the die head gradually increases. The material distribution gap eventually connects upward to the inverted conical discharge gap.

[0015] The outer circumferential surface of the spiral flow divider is also provided with a plurality of annular grooves distributed at equal intervals, and the annular grooves are located above the spiral flow channel;

[0016] The bottom surface of the spiral splitter mandrel is provided with a material passage hole that communicates with the intermediate shaft, and the curved surface of the material passage hole is provided with a material distribution hole that communicates with the lower edge of each spiral flow channel at equal angles.

[0017] The lower end of the air passage is provided with a first vent hole extending obliquely downward into the chassis. The outer peripheral surface of the chassis is provided with a second vent hole communicating with the first vent hole, and the second vent hole is connected to the air pipe. The first vent hole and the material distribution hole are misaligned.

[0018] Preferably, it also includes a cooling device, which includes a fixed ring that is fixedly installed, and an air ring that is rotatably connected inside the fixed ring. The air ring is fixedly connected to the upper end of the rotating head assembly, and the inner side of the air ring is provided with an upper air outlet and a lower air outlet that are distributed vertically and arranged in a ring. The air outlet of the upper air outlet is vertically upward, and the air outlet of the lower air outlet is upward and inclined toward the axis of the rotating head assembly.

[0019] It also includes a first fan, in which the nozzles are connected to the outer circumference of the fixed ring via several air ducts and are connected to the upper air outlet and the lower air outlet.

[0020] Preferably, the feeding device includes a feeding pipe and a right-angle feeding seat. The feeding pipe is connected to a transverse feeding port in the right-angle feeding seat, and a longitudinal feeding port in the right-angle feeding seat is connected to the connecting seat. A screw is rotatably connected inside the feeding pipe, and an extrusion motor for driving the screw to rotate is also included. A feeding port is also provided on the side of the feeding pipe away from the right-angle feeding seat.

[0021] Preferably, the feed pipe is covered with a hood, a second fan is fixed on one side of the hood, the nozzle inside the second fan is directly opposite the feed pipe located inside the hood, and an exhaust duct is provided on the other side of the hood.

[0022] The second fan is provided with three sets arranged along the length of the feed pipe;

[0023] The injection port is located outside the air shroud.

[0024] Preferably, the extrusion motor is fixed on a motor base, and a base plate is fixed between the first blower and the motor base, wherein the lower side of the motor base, the base plate, and the first blower are coplanar;

[0025] The outer casing of the first blower is cylindrical, and the nozzles inside the first blower are set at equal angles on its circumference. A vertically mounted mounting plate is fixed on the first blower, the right-angle feed seat is fixed on the mounting plate, and the extrusion device is located on the upper side of the first blower.

[0026] The beneficial effects of this invention are:

[0027] This invention addresses the shortcomings of existing rotary blown film machines, which have cumbersome internal air supply systems that require frequent disassembly and assembly of external air supply components. By using a fixed air inlet seat and an air outlet seat rotatably connected within it, the invention achieves a continuous and stable air supply, eliminating the need for periodic disassembly and assembly of external air supply components during production. This significantly simplifies the production process and ensures product quality.

[0028] The present invention installs the extrusion device above the first blower, making full use of the vertical space. The right-angle feed seat is directly fixed to the mounting plate of the first blower, so that the feeding device and the extrusion device are closely connected. This integrated layout greatly reduces the horizontal footprint of the equipment and improves the space utilization rate of the production workshop. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the appearance of the present invention;

[0031] Figure 2 for Figure 1 Cross-sectional perspective view of the central rotary head assembly;

[0032] Figure 3 for Figure 1 Exploded view of the rotating head assembly;

[0033] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0034] Figure 5 for Figure 1 Schematic diagram of the internal structure of the rotating head assembly;

[0035] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0036] Figure 7 for Figure 1 A schematic diagram of the extrusion unit from another perspective;

[0037] Figure 8 for Figure 1 Schematic diagram of the main structure within the stroke ring;

[0038] Figure 9This is a schematic diagram of the appearance of the invention from another perspective (with the extrusion motor removed).

[0039] The diagram is marked as follows:

[0040] 11. Rotary head assembly; 12. Rotary drive support assembly; 21. Connecting seat; 22. Fixed housing; 23. Rotating seat; 24. Fixed plate; 26. Air inlet seat; 27. Air outlet seat; 28. Intermediate shaft; 31. Die head outer cylinder; 32. Spiral diverter spindle; 33. Chassis; 34. Air pipe; 35. Discharge die; 36. Center cover; 41. Support plate; 42. Rotary motor; 51. Fixed 52. Air ring; 53. Upper air outlet; 54. Lower air outlet; 55. First fan; 56. Air duct; 57. Mounting plate; 61. Feed pipe; 62. Right-angle feed seat; 63. Extrusion motor; 64. Injection port; 65. Air cover; 66. Second fan; 71. Motor base; 72. Base plate; 81. Convex ring; 82. Ring groove; 83. Transfer groove; 91. Distributing hole; 92. Air inlet. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0042] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] like Figures 1-9 As shown, a fixed-inlet rotary blown film extrusion machine includes a feeding device and an extrusion device. The feeding device is used to store the raw materials required for film making and stably convey them to the extrusion device. The extrusion device is used to extrude the raw materials to form a tubular film.

[0044] Specifically, such as Figure 1As shown, the extrusion device includes a rotating die head assembly 11 and a rotating drive support assembly 12 distributed vertically. The rotating die head assembly 11 can rotate slowly during the film-making process to evenly distribute defects such as processing errors, melt pressure fluctuations, and uneven cooling within the rotating die head assembly 11 to the entire circumference of the produced film, thereby improving the thickness uniformity and surface quality of the film. The rotating drive support assembly 12 is used to support the rotating die head assembly 11 and drive it to rotate.

[0045] Among them, such as Figures 2-3 As shown, the specific structure of the rotary head assembly 11 is as follows: the rotary head assembly 11 includes a spiral diverting mandrel 32 and a die head outer cylinder 31 distributed inside and outside. The upper end of the die head outer cylinder 31 is fixed with a discharge mold 35, and the upper end of the spiral diverting mandrel 32 is fixed with a center cover 36. The specific fixing method of the die head outer cylinder 31 and the spiral diverting mandrel 32 is as follows: the lower end of the spiral diverting mandrel 32 is integrally formed with a base 33 fixed to the lower side of the die head outer cylinder 31.

[0046] like Figure 3 As shown, multiple spiral channels are provided at equal angles on the outer circumferential surface of the spiral flow mandrel 32. The groove depth of the spiral channels gradually decreases in the upward direction, and the outer diameter of the spiral flow mandrel 32 gradually decreases in the upward direction, so that the material equalization gap formed between the mandrel and the inner wall of the outer cylinder 31 of the die head gradually increases. There is an inverted conical discharge gap between the center cover 36 and the discharge die 35, and the inverted conical discharge gap is connected to the material equalization gap.

[0047] In addition, a material passage hole is provided in the bottom surface of the spiral flow mandrel 32 (the material passage hole can be regarded as penetrating the chassis 33 downward), and a material distribution hole 91 connected to the lower edge of each spiral flow channel is provided at equal angles in the curved surface of the material passage hole.

[0048] The spiral flow divider 32 adopts a spiral flow channel with gradually decreasing groove depth and a gradually changing material distribution gap, so that the molten plastic is evenly distributed during the upward flow, effectively eliminating melt pressure fluctuations. The material distribution holes 91, which are set at equal angles on the inner wall of the material passage, evenly distribute the material into each spiral flow channel, avoiding flow deviation.

[0049] In order to enable the manufactured membrane to expand outward, the spiral mandrel 32 is provided with an upward-through air channel, and the center cover 36 is provided with an air inlet 92 that is vertically through and connected to the air channel, so as to stably deliver external air to the interior of the tubular membrane preform (membrane bubble) extruded in the rotary die assembly 11, so that the membrane preform is inflated.

[0050] During the extrusion process, the raw material enters the spiral flow channel through the feed hole and the distribution hole 91, moves upward along the spiral flow channel, and is then extruded upward after passing through the equalization gap and the inverted conical discharge gap. It is then inflated by air blown out through the air inlet 92 to complete the film forming process.

[0051] Furthermore, in order to further improve the quality of film production, such as Figure 3 As shown, the outer circumferential surface of the spiral flow mandrel 32 is also provided with a plurality of annular grooves distributed at equal intervals. The annular grooves are located above the spiral flow channel to further improve the material uniformity effect.

[0052] The specific structure of the rotary drive support assembly 12 is as follows: Figure 2 as well as Figure 4 As shown, the rotary drive support assembly 12 includes a connecting seat 21, which is downwardly connected to the feeding device. A fixed shell 22 is fixedly provided outside the connecting seat 21. A rotating seat 23 is rotatably connected inside the fixed shell 22. The rotating seat 23 communicates with the flow channel inside the connecting seat 21. A sealing scheme is provided inside the fixed shell 22 to prevent leakage when the material in the flow channel inside the connecting seat 21 is transferred to the rotating rotating seat 23. This sealing scheme is a conventional setting in the prior art and will not be described in detail here.

[0053] The rotating seat 23 and the spiral diverting spindle 32 (specifically the material passage hole at the bottom of the spiral diverting spindle 32) are fixedly connected by an intermediate shaft 28 and can transfer materials. It also includes a fixed plate 24, which is equipped with a power source for driving the rotating seat 23 to rotate.

[0054] like Figure 4 As shown, an air inlet seat 26 is also fixed on the fixed plate 24, and an air outlet seat 27 is rotatably connected to the air inlet seat 26 at the lower end of the chassis 33. The air outlet in the air outlet seat 27 is connected to the air inlet in the air inlet seat 26 and is connected to the chassis 33 through an air pipe 34 to connect to the air passage.

[0055] Specifically, such as Figure 5 and Figure 6 As shown, the lower end of the air passage is provided with a first vent hole extending obliquely downward into the chassis 33, and the outer peripheral surface of the chassis 33 is provided with a second vent hole communicating with the first vent hole. The second vent hole is connected to the air pipe 34, and the first vent hole is offset from the material distribution hole.

[0056] The scheme for maintaining communication between the air inlet and the air outlet is as follows: A convex ring 81 is integrally formed on the inner curved surface of the air inlet seat 26. The inner curved surface of the convex ring 81 presses against the outer curved surface of the air outlet seat 27. An annular groove 82 is also provided within the inner curved surface of the convex ring 81. The air inlet communicates with the annular groove 82. An L-shaped transfer groove 83 is provided within the air outlet seat 27. The transverse portion of the transfer groove 83 extends outward through the air outlet seat 27 and is at the same height as the annular groove 82, thus forming... The air outlet is connected to the upper edge of the transfer groove 83 to achieve ventilation between the air inlet and the air outlet. This ventilation will not be terminated or blocked by the rotation of the air outlet seat 27 relative to the air inlet seat 26. In addition, a pressure sensor acting on the transfer groove 83 is provided in the air outlet seat 27. The pressure sensor is electrically connected to an external air supply device to ensure stable pressure inside the membrane. Sealing rings can be installed on the upper and lower sides of the annular groove 82 to prevent air leakage.

[0057] The specific intramembrane air blowing process is as follows:

[0058] The air inlet in the fixed direction of the air inlet seat 26 is connected to an external air supply device so that compressed air can enter the rotating air outlet seat 27 (the transfer groove 83) through the annular groove 82, and then pass through the air pipe 34, the second vent hole and the first vent hole into the air passage, and then be discharged upward through the inflation hole so that the film preform extruded from the rotating die assembly 11 is inflated.

[0059] By designing the fixed position of the air inlet, the rotating head assembly 11 can rotate to ensure the quality of the blown film while avoiding frequent disassembly and reassembly of the external air supply equipment, which facilitates production.

[0060] The specific configuration of the power source is as follows: Figure 7 As shown, a support plate 41 is also fixed to the upper end of the fixed shell 22. The power source is a rotary motor 42 fixed to the support plate 41. The output shaft inside the rotary motor 42 and the rotating seat 23 are respectively provided with a gear that meshes with each other. The two gears are not of the same specification so as to achieve speed reduction transmission.

[0061] When the rotary motor 42 is powered on, it can drive the rotating seat 23, the intermediate shaft 28 and the rotary head assembly 11 to rotate through the gear.

[0062] The support plate 41 is connected to the fixing plate 24 via a first vertical plate to keep the fixing plate 24 and the support plate 41 in a fixed relative position.

[0063] In this embodiment, the intermediate shaft 28 and the rotatably mounted air outlet seat 27 jointly support the rotating head assembly 11, and the lower side of the fixing plate 24 can also be provided with support for itself to maintain stable feet (not shown in the figure).

[0064] Furthermore, a cooling device is included to further improve the blown film quality. Specifically, the cooling device includes a fixed ring 51, within which an air ring 52 is rotatably connected. The air ring 52 is fixedly connected to the upper end of the rotating head assembly 11, allowing the air ring 52 to be rotated. Figure 8 As shown, the inner side of the air ring 52 is provided with an upper air outlet 53 and a lower air outlet 54 that are distributed vertically and arranged in a ring. The air outlet 53 is vertically upward, and the air outlet 54 is upward and inclined toward the axis of the rotating head assembly 11. The diameter of the upper air outlet 53 is larger than that of the lower air outlet 54.

[0065] It also includes a first fan 55, in which multiple air nozzles are connected to the outer circumferential surface of the fixing ring 51 via several air ducts 56, and are connected to the upper air outlet 53 and the lower air outlet 54.

[0066] The preform extruded by the rotating die assembly 11 is cooled by the cooling device to accelerate the shaping process. The lower air outlet 54 uses inwardly inclined airflow to quickly shape the preform and generate radial stability constraint. The upper air outlet 53 uses vertical low-speed airflow to perform circumferential uniform secondary cooling on the preform and axially lift and reduce the load, thereby reducing uneven stress during longitudinal stretching and further improving the quality of the preform.

[0067] In this embodiment, the fixing ring 51 is fixed by means that a second vertical plate for connecting to the fixing ring 51 is also fixed on the support plate 41.

[0068] like Figure 9 As shown, the feeding device includes a feeding pipe 61 and a right-angle feed seat 62. The feeding pipe 61 is connected to the transverse feed port in the right-angle feed seat 62, and the longitudinal discharge port in the right-angle feed seat 62 is connected to the connecting seat 21. A screw is rotatably connected inside the feeding pipe 61, and the device also includes an extrusion motor 63 for driving the screw to rotate. A feeding port 64 is also provided on the side of the feeding pipe 61 away from the right-angle feed seat 62.

[0069] The complete raw material transportation process is as follows:

[0070] The raw material is injected into the feed pipe 61 through the injection port 64, and then enters the right-angle feed seat 62 under the drive of the screw driven by the extrusion motor 63. After that, the raw material is pressed upward through the connecting seat 21, the rotating seat 23 and the intermediate shaft 28 into the rotary head assembly 11, and is extruded to form a film.

[0071] In order to control the temperature of the raw material inside the feed pipe 61, the feed pipe 61 is covered with a fan shroud 65. A second fan 66 is fixed on one side of the fan shroud 65. The nozzle inside the second fan 66 is directly opposite the feed pipe 61 located inside the fan shroud 65. An exhaust duct is provided on the other side of the fan shroud 65. In this embodiment, three second fans 66 are arranged along the length of the feed pipe 61. The injection port 64 is located outside the fan shroud 65, specifically on the right side of the fan shroud 65, to avoid interfering with the feeding.

[0072] In order to reduce the footprint of the fixed air intake rotary blown film machine and improve the equipment integration rate, the specific installation and connection method of each component in this embodiment is as follows: the extrusion motor 63 is fixed on the motor base 71 and connected to the feed pipe 61 through the reduction gearbox; a base plate 72 is fixed between the first blower 55 and the motor base 71; the lower side of the motor base 71, the base plate 72 and the first blower 55 are coplanar so as to contact the ground together.

[0073] The outer casing of the first blower 55 is cylindrical, and the nozzles inside the first blower 55 are set at equal angles on its circumferential surface. A vertically arranged mounting plate 57 is fixed on the first blower 55, the right-angle feed seat 62 is fixed on the mounting plate 57, and the extrusion device is set on the upper side of the first blower 55.

[0074] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0075] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A fixed-inlet rotary blown film extrusion machine, comprising a feeding device and an extrusion device, characterized in that: The extrusion device includes a vertically distributed rotary die head assembly and a rotary drive support assembly; The rotating head assembly includes a spiral flow divider mandrel and a die head outer cylinder distributed inside and outside. The spiral flow divider mandrel is provided with an upwardly penetrating air passage. The lower end of the spiral flow divider mandrel is integrally formed with a chassis fixed to the lower side of the die head outer cylinder. The rotary drive support assembly includes a connecting seat, which is downwardly connected to the feeding device. A fixed shell is fixedly provided outside the connecting seat. A rotating seat is rotatably connected inside the fixed shell. The rotating seat and the flow channel inside the connecting seat are interconnected. The rotating seat and the spiral diverting spindle are also connected by an intermediate shaft for material transfer. The assembly also includes a fixed plate, which is equipped with a power source for driving the rotating seat to rotate and driving the rotary head assembly to rotate through the intermediate shaft. An air inlet is also fixedly provided on the fixed plate. An air outlet is rotatably connected to the air inlet in the lower end of the chassis. An air outlet in the air outlet, which rotates with the air inlet, is connected to an air inlet in a fixed direction in the air inlet and is connected to the chassis through an air pipe to connect to the air passage. The inner curved surface of the air inlet seat is integrally formed with a convex ring. The inner curved surface of the convex ring presses against the outer curved surface of the air outlet seat. An annular groove is also provided in the inner curved surface of the convex ring. The air inlet is connected to the annular groove. An L-shaped transfer groove is provided in the air outlet seat. The transverse portion of the transfer groove extends outward through the air outlet seat and is at the same height as the annular groove to form ventilation. The air outlet is connected to the upper edge of the transfer groove. The rotary head assembly also includes an inner and outer center cover and a discharge mold. The center cover is fixed on the spiral diverter spindle, and the discharge mold is fixed on the outer cylinder of the mold head. There is an inverted conical discharge gap between the center cover and the discharge mold, and the center cover is provided with an air inlet that runs vertically through and connects to the air passage. It also includes a cooling device, which includes a fixed ring that is fixedly installed. An air ring is rotatably connected inside the fixed ring. The air ring is fixedly connected to the upper end of the rotating head assembly. The inner side of the air ring is provided with an upper air outlet and a lower air outlet that are distributed vertically and arranged in a ring. The air outlet of the upper air outlet is vertically upward, and the air outlet of the lower air outlet is upward and inclined toward the axis of the rotating head assembly. It also includes a first fan, in which the nozzles are connected to the outer circumference of the fixed ring via several air ducts and are connected to the upper air outlet and the lower air outlet.

2. The fixed air intake rotary blown film machine according to claim 1, characterized in that: The upper end of the fixed shell is also fixed with a support plate, and the power source is a rotary motor fixed on the support plate. The output shaft inside the rotary motor and the rotating seat are respectively provided with a meshing gear. The support plate is connected to the fixed plate via a first vertical plate.

3. The fixed air intake rotary blown film machine according to claim 1, characterized in that: The outer circumferential surface of the spiral flow splitter is provided with multiple spiral channels at equal angles, and the groove depth of the spiral channels gradually decreases in the upward direction; The outer diameter of the spiral flow divider gradually decreases in the upward direction, so that the material distribution gap formed between it and the inner wall of the outer cylinder of the die head gradually increases. The material distribution gap eventually connects upward to the inverted conical discharge gap. The outer circumferential surface of the spiral flow divider is also provided with a plurality of annular grooves distributed at equal intervals, and the annular grooves are located above the spiral flow channel; The bottom surface of the spiral splitter mandrel is provided with a material passage hole that communicates with the intermediate shaft, and the curved surface of the material passage hole is provided with a material distribution hole that communicates with the lower edge of each spiral flow channel at equal angles. The lower end of the air passage is provided with a first vent hole extending obliquely downward into the chassis. The outer peripheral surface of the chassis is provided with a second vent hole communicating with the first vent hole, and the second vent hole is connected to the air pipe. The first vent hole and the material distribution hole are misaligned.

4. A fixed-inlet rotary blown film machine with a die head according to claim 1, characterized in that: The feeding device includes a feeding pipe and a right-angle feeding seat. The feeding pipe is connected to the transverse feeding port in the right-angle feeding seat, and the longitudinal feeding port in the right-angle feeding seat is connected to the connecting seat. A screw is rotatably connected inside the feeding pipe, and an extrusion motor for driving the screw to rotate is also included. A feeding port is also provided on the side of the feeding pipe away from the right-angle feeding seat.

5. A fixed-inlet rotary blown film machine according to claim 4, characterized in that: The feed pipe is covered with a hood, and a second fan is fixed on one side of the hood. The nozzle inside the second fan is directly opposite the feed pipe located inside the hood. An exhaust duct is provided on the other side of the hood. The second fan is provided with three sets arranged along the length of the feed pipe; The injection port is located outside the air shroud.

6. A fixed-inlet rotary blown film machine according to claim 5, characterized in that: The extrusion motor is fixed on the motor base, and a base plate is fixed between the first blower and the motor base. The lower side of the motor base, the base plate and the first blower are coplanar. The outer casing of the first blower is cylindrical, and the nozzles inside the first blower are set at equal angles on its circumference. A vertically mounted mounting plate is fixed on the first blower, the right-angle feed seat is fixed on the mounting plate, and the extrusion device is located on the upper side of the first blower.

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