A plastic packaging film production apparatus

Abstract

The application discloses a plastic packaging film production equipment, including fixed frame, stable bubble ware, herringbone frame, extrusion roller and base, the top of base is fixedly connected with feeding die, the top of feeding die is provided with extrusion die, the inside of feeding die is provided with material guiding channel, the cross section of material guiding channel is L-shaped, one end of material guiding channel is fixedly connected with feeding pipe, the end of material guiding channel away from feeding pipe is provided with circular groove, the cross section of circular groove is semicircular, the top outer wall of extrusion die is fixedly connected with first circular ring die and second circular ring die respectively. In the application, the negative pressure suction force can be generated in the shell, when the negative pressure suction force is generated in the shell, not only the backflow rate of high-temperature airflow in the backflow pipe can be accelerated, the cooling effect of the film blowing pipe on the film body is ensured, but also the high-temperature airflow dead angle at the top of the backflow pipe is avoided, the high-temperature air is timely sucked away, and the cooling effect of the film bubble is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic packaging film production, in particular to a plastic packaging film production equipment. BACKGROUND

[0002] In recent years, with the gradual enhancement of people's environmental protection consciousness, polyolefin heat shrinkable film is favored by more high-end markets, gradually replacing PVC heat shrinkable film, market capacity is increasing dramatically, and becomes the mainstream of soft packaging materials.

[0003] At present, in the production process of polyolefin heat shrinkable film, the blow molding process is one of the important processing steps. According to the search, the Chinese invention patent with the publication number CN117382156B discloses a plastic film blowing device and method, which belongs to the field of film processing, and includes support rods, the number of support rods is four and they are distributed in a rectangular shape, the lower side of the support rod is fixedly connected with a bracket one, a film blowing assembly is arranged between the four support rods, the film blowing assembly includes a fixed seat fixedly connected with the bracket one, the lower end outer surface of the fixed seat is fixedly connected with a feeding mechanism, the outer surface right side of the feeding mechanism is fixedly connected with a feeding mechanism, and the inner side of the feeding mechanism is provided with a air supply assembly.

[0004] It is found that the above-mentioned patent still has the following disadvantages in combination with the prior art: in the process of blowing and cooling the film by the air inlet assembly and the backflow assembly, since the specification of the air inlet cover is much larger than that of the return air pipe, the high-temperature air flow circulating in the film will be blocked, the high-temperature air flow will form a vortex at the top of the air inlet cover to form a dead angle, the temperature of the air flow will continue to rise due to the local formation of the dead angle in the film bubble, and the air with the highest temperature cannot be absorbed in time, thereby affecting the cooling effect of the film bubble. Therefore, there is an urgent need for a plastic packaging film production equipment to solve the above-mentioned problems. SUMMARY

[0005] In view of the problems in the related art, the present application provides a plastic packaging film production equipment to overcome the above-mentioned technical problems existing in the prior art.

[0006] The technical scheme of the present application is as follows:

[0007] The utility model relates to a kind of plastic packaging film production equipment, including fixed frame, bubble stabilizer, herringbone frame, extrusion roller and base, the top of the base is fixedly connected with feeding die, the top of the feeding die is provided with extrusion die, the inside of the feeding die is opened with material guiding passage, the cross section of the material guiding passage is L-shaped, one end of the material guiding passage is fixedly connected with feed pipe, the end of the material guiding passage away from the feed pipe is opened with circular ring groove, the cross section of the circular ring groove is semicircular, the top outer wall of the extrusion die is fixedly connected with first circular ring die and second circular ring die respectively, the gap of the first circular ring die and the second circular ring die forms film outlet channel, the film outlet channel extends to the inside of the extrusion die, and the inside of the extrusion die is provided with feeding assembly;

[0008] The circumferential outer wall of the feeding die is fixedly connected with air inlet pipe and exhaust pipe, the air inlet pipe is connected with air blower by pipeline, the inside of the feeding die and the extrusion die is opened with air inlet channel and exhaust channel, the air inlet channel is communicated with the air inlet pipe, the exhaust channel is communicated with the exhaust pipe, the inside of the extrusion die is opened with blow molding groove, the air inlet channel is communicated with the blow molding groove, the bottom inner wall of the blow molding groove is fixedly connected with reflux pipe, the exhaust channel is communicated with the reflux pipe, and the top outer wall of the second circular ring die is provided with film blowing assembly.

[0009] Further, the inside of the extrusion die is opened with extrusion channel, the extrusion channel is equidistant circular distribution in the inside of the feeding die, the cross section of the extrusion channel is spiral, and the extrusion channel is communicated with feeding assembly.

[0010] Further, the feeding assembly includes gathering channel, ascending channel, extrusion channel and feeding channel opened in the inside of the extrusion die, the gathering channel, the ascending channel, the extrusion channel and the feeding channel are sequentially distributed from below to above of extrusion die, and the gathering channel, the ascending channel, the extrusion channel and the feeding channel are communicated with each other, and the feeding channel is communicated with the film outlet channel.

[0011] Further, the inner diameter of the feeding channel and the ascending channel gradually decreases along ascending direction, the inner diameter of the extrusion channel decreases first and then increases along ascending direction, and the inner diameter of the gathering channel remains unchanged along ascending direction.

[0012] Further, the film blowing assembly comprises a ring plate fixedly connected to the inner wall of the bottom of the blow molding groove, the circumferential inner wall of the ring plate, the bottom inner wall of the blow molding groove and the circumferential outer wall of the return pipe surround an air outlet cavity, one end of the air inlet channel is located in the air outlet cavity, the inner diameter of the ring plate gradually decreases in the direction away from the feeding die, the top outer wall of the second circular ring die is fixedly connected with a film blowing pipe, the circumferential outer wall of the film blowing pipe is provided with equidistantly distributed circular holes, and the film blowing pipe is located in the inside of the film body.

[0013] Further, the circumferential outer wall of the return pipe is fixedly connected with a bearing seat, the circumferential outer wall of the bearing seat is fixedly connected with a vane seat, the circumferential outer wall of the vane seat is fixedly connected with equidistantly circularly distributed first vanes, the first vanes are in the shape of a turbofan vane, and the first vanes are located above the inside of the ring plate.

[0014] Further, the top outer wall of the vane seat is fixedly connected with a vertical column, one end of the vertical column away from the vane seat is fixedly connected with an external tooth ring, and the circumferential inner wall of the external tooth ring is meshed with an internal tooth ring.

[0015] Further, the top outer wall of the return pipe is fixedly connected with a shell, the return pipe is in communication with the shell, the middle part of the internal tooth ring is fixedly connected with a ring plate, the bottom outer wall of the ring plate is fixedly connected with a rotating rod, the circumferential outer wall of the rotating rod is fixedly connected with a shaft sleeve, the circumferential outer wall of the shaft sleeve is fixedly connected with equidistantly circularly distributed second vanes, the second vanes are located in the inside of the shell, the top outer wall of the shell is provided with equidistantly circularly distributed air suction grooves, and the cross section of the air suction groove is in the shape of S.

[0016] Further, the circumferential inner wall of the return pipe is fixedly connected with a support frame, one end of the support frame away from the circumferential inner wall of the return pipe is fixedly connected with a rotating seat, and one end of the rotating rod away from the ring plate is fixedly connected with the rotating seat.

[0017] Further, the circumferential outer wall of the return pipe is provided with a transmission seat, the circumferential outer wall of the vertical column is in contact with the circumferential inner wall of the transmission seat, and the transmission seat is fixedly connected with the return pipe and the film blowing pipe on the two sides.

[0018] The beneficial effects of the present application are as follows:

[0019] The plastic packaging film production equipment provided by the application, through the setting of the extrusion die, the feeding die and the extrusion channel, when the staff needs to produce and extrude the film body, the feeding pipe can be first connected with the external screw extruder, the molten plastic is extruded into the inside of the flow guide channel through the screw extruder, the plastic entering the inside of the flow guide channel is first divided into the inside of the extrusion channel, because the extrusion channel is spiral, the spiral extrusion channel can realize the rapid division and preliminary extrusion of the molten plastic, the bubbles in the molten plastic are quickly extruded, the molten plastic containing a large amount of air is avoided, the situation that the quality of the produced plastic film is poor is avoided, meanwhile, the spiral channel can prolong the extrusion path of the molten plastic, so that the air in the molten plastic is more completely discharged, and the prolonged extrusion path can make the molten plastic be more quickly cooled and formed.

[0020] The plastic packaging film production equipment provided by the application, through the setting of the feeding assembly, the plastic extruded from the extrusion channel enters the gathering channel to be mixed again, then the pressure in the inside of the gathering channel gradually increases as the plastic is continuously extruded, so that the plastic is extruded into the inside of the rising channel, and the inner diameter of the rising channel gradually decreases, so that the situation that the plastic entering the inside of the extrusion channel is blocked or the feeding speed is reduced due to the abrupt change of the inner diameter is avoided, which is beneficial to the secondary extrusion and bubble removal of the plastic in the subsequent extrusion channel, after the secondary bubble removal of the plastic in the extrusion channel, the plastic is extruded into the inside of the feeding channel and is finally extruded from the film outlet channel, so that the production process of the film body is quickly completed.

[0021] The plastic packaging film production equipment provided by the application, through the setting of the blow molding groove, the return flow pipe and the film blowing pipe, the high-speed airflow generated by the air blower enters the gas outlet cavity in the inside of the blow molding groove through the air inlet channel, as the high-speed airflow in the inside of the gas outlet cavity rises, the high-speed airflow collides with the first blade, because the first blade is in the shape of a turbofan blade, so that the power of the airflow rising vertically is converted into the rotating power in the horizontal direction, when the first blade rotates, the blade seat can be driven to rotate together, through the rotation of the blade seat, the vertical column and the outer gear ring fixed on the top of the blade seat can be driven to rotate together, when the outer gear ring rotates, the inner gear ring engaged with the outer gear ring can be driven to rotate together, the middle part of the inner gear ring is fixed with a rotating rod, finally the rotating rod and the second blade can be driven to rotate, so that the negative pressure suction force in the inside of the shell is generated, when the strong negative pressure suction force in the inside of the shell is generated, not only the return flow rate of the high-temperature airflow in the inside of the return flow pipe can be accelerated, the cooling effect of the film body on the film blowing pipe is ensured, but also the high-temperature airflow dead angle at the top of the return flow pipe can be avoided, the air with high temperature is sucked away in time, and the cooling effect of the film bubble is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0023] Figure 1 It is a schematic diagram of the overall front structure of the present application.

[0024] Figure 2 It is a schematic diagram of the overall cross-sectional plane structure of the present application.

[0025] Figure 3 It is a schematic diagram of the enlarged structure at A in the present application. Figure 2

[0026] Figure 4 It is a schematic diagram of the cross-sectional structure of the extrusion die and the feeding die of the present application.

[0027] Figure 5 It is a schematic diagram of the enlarged structure at B in the present application. Figure 4

[0028] Figure 6 It is a schematic diagram of the enlarged structure at C in the present application. Figure 4

[0029] Figure 7 It is a schematic diagram of the distribution of the blowing tube of the present application on the extrusion die.

[0030] Figure 8 It is a schematic diagram of the longitudinal cross-sectional structure of the extrusion die and the feeding die of the present application.

[0031] Figure 9 It is a schematic diagram of the cross-sectional overhead structure of the extrusion channel of the present application.

[0032] Figure 10 It is a schematic diagram of the gas flow direction in the return pipe of the blowing tube in the present application.

[0033] In the drawings:

[0034] ​​​1, fixed frame; 2, bubble stabilizer; 3, base; 4, herringbone frame; 5, extrusion roller; 6, film body; 7, extrusion die; 8, feeding die; 9, material guiding channel; 10, film outlet channel; 11, feeding channel; 12, extrusion channel; 13, gathering channel; 14, rising channel; 15, air outlet cavity; 16, ring cylinder plate; 17, blow molding groove; 18, bearing seat; 19, first blade; 20, return pipe; 21, exhaust channel; 22, circular ring groove; 23, material extruding channel; 24, first circular ring die; 25, second circular ring die; 26, film blowing pipe; 27, circular hole; 28, transmission seat; 29, vertical column; 30, outer gear ring; 31, inner gear ring; 32, air suction groove; 33, rotating rod; 34, shell; 35, support frame; 36, rotating seat; 37, shaft sleeve; 38, second blade; 39, blade seat; 40, exhaust pipe; 41, air inlet pipe; 42, feeding pipe; 43, air inlet channel. DETAILED DESCRIPTION

[0035] The technical solutions of the patent will be further described in detail below in combination with specific embodiments.

[0036] The embodiments of the patent will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the patent, and cannot be understood as a limitation on the patent.

[0037] In the description of the patent, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the patent and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the patent.

[0038] In the description of the patent, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meanings of the above terms in the patent can be understood according to the specific circumstances. Please refer to Figures 1-10The utility model relates to a kind of plastic packaging film production equipment, including fixed frame 1, bubble stabilizer 2, herringbone frame 4, extrusion roller 5 and base 3, the top of base 3 is fixedly connected with feeding die 8, the top of feeding die 8 is provided with extrusion die 7, the inside of feeding die 8 is opened with material guiding channel 9, the cross section of material guiding channel 9 is L-shaped, one end of material guiding channel 9 is fixedly connected with feed pipe 42, the end of material guiding channel 9 away from feed pipe 42 is opened with circular groove 22, the cross section of circular groove 22 is semicircular, the top outer wall of extrusion die 7 is fixedly connected with first circular ring die 24 and second circular ring die 25 respectively, the gap of first circular ring die 24 and second circular ring die 25 forms film outlet channel 10, film outlet channel 10 extends to the inside of extrusion die 7, and the inside of extrusion die 7 is provided with feeding assembly;

[0039] The outer wall of the circumference of feeding die 8 is fixedly connected with air inlet pipe 41 and exhaust pipe 40 respectively, air inlet pipe 41 is connected with air blower by pipeline, and the inside of feeding die 8 and extrusion die 7 is opened with air inlet channel 43 and exhaust channel 21, air inlet channel 43 is communicated with air inlet pipe 41, exhaust channel 21 is communicated with exhaust pipe 40, the inside of extrusion die 7 is opened with blow molding groove 17, air inlet channel 43 is communicated with blow molding groove 17, return pipe 20 is fixedly connected on the bottom inner wall of blow molding groove 17, exhaust channel 21 is communicated with return pipe 20, the top outer wall of second circular ring die 25 is provided with film blowing assembly, can quickly complete the film blowing production work to film body 6, effectively avoid the influence of bubble to film body 6 product in the process of film blowing production, and the whole production equipment has good blow molding cooling effect to film bubble, guarantees the quality of produced film body 6.

[0040] Preferably, the inside of extrusion die 7 is opened with extrusion channel 23, extrusion channel 23 is equidistant circular distribution in the inside of feeding die 8, the cross section of extrusion channel 23 is spiral, and extrusion channel 23 is communicated with feeding assembly, since extrusion channel 23 is spiral, therefore spiral extrusion channel 23 can realize the rapid shunt and preliminary extrusion of molten plastic, quickly extrude the bubble in molten plastic, avoid that molten plastic contains a large amount of air, lead to the condition that the quality of produced plastic film is poor occurs, spiral channel can extend the extrusion path of molten plastic simultaneously, thereby make the air in molten plastic more thoroughly discharged, and the extended extrusion path can make molten plastic can be more quickly cooled and formed.

[0041] Preferably, the feeding assembly comprises a gathering channel 13, an ascending channel 14, an extruding channel 12 and a feeding channel 11 which are arranged in the extrusion die 7 from bottom to top and are communicated with each other, the feeding channel 11 is communicated with the film outlet channel 10, the inner diameter of the feeding channel 11 and the ascending channel 14 gradually decreases in the ascending direction, the inner diameter of the extruding channel 12 gradually decreases first and then increases in the ascending direction, the inner diameter of the gathering channel 13 remains unchanged in the ascending direction, the blowing assembly comprises a ring plate 16 which is fixedly connected to the inner wall of the bottom of the blowing tank 17, the circumferential inner wall of the ring plate 16, the bottom inner wall of the blowing tank 17 and the circumferential outer wall of the return pipe 20 surround the air outlet cavity 15, one end of the air inlet channel 43 is located in the air outlet cavity 15, the inner diameter of the ring plate 16 gradually decreases away from the feeding die 8, the top outer wall of the second circular die 25 is fixedly connected with the film blowing pipe 26, the circumferential outer wall of the film blowing pipe 26 is provided with equidistantly distributed circular holes 27, the film blowing pipe 26 is located in the inside of the film body 6, the plastic which is extruded from the extruding channel 23 enters the gathering channel 13 to be gathered and mixed again, then the pressure in the gathering channel 13 gradually increases as the plastic is continuously extruded, and the plastic is extruded into the ascending channel 14, and the inner diameter of the ascending channel 14 gradually decreases, so that the plastic which enters the extruding channel 12 in the subsequent process will not be blocked or the feeding speed will not be reduced due to the abrupt change of the inner diameter, which is beneficial to the secondary extrusion and bubble removal of the plastic in the extruding channel 12, and the plastic which is removed bubbles in the extruding channel 12 is extruded into the feeding channel 11 and is finally extruded from the film outlet channel 10 through the feeding channel 11.

[0042] Preferably, the circumferential outer wall of the return pipe 20 is fixedly connected to the bearing seat 18, the circumferential outer wall of the bearing seat 18 is fixedly connected to the blade seat 39, the circumferential outer wall of the blade seat 39 is fixedly connected to the first blades 19 distributed in a circular shape at equal distances, the first blades 19 are in the shape of turbofan blades, the first blades 19 are located above the inner part of the annular plate 16, the top outer wall of the blade seat 39 is fixedly connected to the vertical column 29, the end of the vertical column 29 away from the blade seat 39 is fixedly connected to the outer gear ring 30, the circumferential inner wall of the outer gear ring 30 is meshed with the inner gear ring 31, the top outer wall of the return pipe 20 is fixedly connected to the shell 34, the return pipe 20 is connected to the shell 34, the middle part of the inner gear ring 31 is fixedly connected to a ring plate, the bottom outer wall of the ring plate is fixedly connected to a rotating rod 33, the circumferential outer wall of the rotating rod 33 is fixedly connected to a shaft sleeve 37, the circumferential outer wall of the shaft sleeve 37 is fixedly connected to the second blades 38 distributed in a circular shape at equal distances, the second blades 38 are located inside the shell 34, the top outer wall of the shell 34 is provided with suction grooves 32 distributed in a circular shape at equal distances, the cross section of the suction groove 32 is S-shaped, the circumferential inner wall of the return pipe 20 is fixedly connected to a support frame 35, and the end of the support frame 35 away from the circumferential inner wall of the return pipe 20 is fixedly connected to The rotating seat 36 and the end of the rotating rod 33 away from the ring plate are fixedly connected to the rotating seat 36. The high-speed airflow generated by the blower will enter the air outlet cavity 15 inside the blowing groove 17 through the air inlet channel 43. As the high-speed airflow inside the air outlet cavity 15 rises, the high-speed airflow will collide with the first blade 19. Since the first blade 19 is in the shape of a turbofan blade, it can convert the vertical upward power of the airflow into horizontal rotational power. When the first blade 19 rotates, it can drive the blade seat 39 to rotate together. The rotation of the blade seat 39 can make the vertical column 29 and the outer gear ring 30 fixed on the top thereof They rotate together. When the outer gear ring 30 rotates, it can drive the inner gear ring 31 meshing with it to rotate together, and a rotating rod 33 is fixed to the middle part of the inner gear ring 31, which can eventually drive the rotating rod 33 and the second blade 38 to rotate, thereby generating negative pressure suction inside the shell 34. When a strong negative pressure suction is generated inside the shell 34, it can not only accelerate the reflux rate of the high-temperature airflow inside the return pipe 20, ensuring the cooling effect of the film blowing tube 26 on the film body 6, but also avoid the generation of a high-temperature airflow dead corner at the top of the return pipe 20, and suck away the high-temperature air in time, ensuring the cooling effect of the film bubble.

[0043] Preferably, a transmission seat 28 is provided on the circumferential outer wall of the return pipe 20, and the circumferential outer wall of the vertical column 29 contacts the circumferential inner wall of the transmission seat 28. The two sides of the transmission seat 28 are fixedly connected to the return pipe 20 and the film blowing tube 26 respectively. The transmission seat 28 can provide good auxiliary support for the vertical column 29, ensuring that the vertical column 29 can perform stable circular motion.

[0044] To sum up, by means of the above technical scheme of the present application, when the staff needs to produce and extrude the film body 6, the feeding pipe 42 can be first connected with the external screw extruder, the molten plastic is extruded into the inside of the guide channel 9 by the screw extruder, the plastic entering the inside of the guide channel is first divided into the inside of the extruding channel 23, since the extruding channel 23 is spiral, the spiral extruding channel 23 can realize rapid division and preliminary extrusion of the molten plastic, rapidly extrude the bubbles in the molten plastic, avoid the molten plastic containing a large amount of air, and cause the plastic film produced to have poor quality, meanwhile, the spiral channel can prolong the extrusion path of the molten plastic, so that the air in the molten plastic is more completely discharged, and the prolonged extrusion path can make the molten plastic be more quickly cooled and formed, the plastic extruded from the extruding channel 23 is gathered and mixed again in the gathering channel 13, then, as the plastic is continuously extruded, the pressure in the gathering channel 13 gradually increases, so that the plastic is extruded into the inside of the ascending channel 14, and the inner diameter of the ascending channel 14 gradually decreases, so that the plastic entering the inside of the extruding channel 12 in the subsequent process will not be blocked or the feeding speed will not be reduced due to the abrupt change of the inner diameter, which is beneficial to the secondary extrusion and bubble removal of the plastic by the extruding channel 12, after the secondary bubble removal of the plastic by the extruding channel 12, the plastic is extruded into the inside of the feeding channel 11, and finally extruded from the film outlet channel 10 through the feeding channel 11, at the same time, the high-speed airflow generated by the air blower enters the air outlet cavity 15 in the blowing tank 17 through the air inlet channel 43, as the high-speed airflow in the air outlet cavity 15 rises, the high-speed airflow collides with the first blade 19, since the first blade 19 is in the shape of a turbofan blade, the vertical rising power of the airflow is converted into the rotating power in the horizontal direction, when the first blade 19 rotates, the blade seat 39 is driven to rotate, the vertical column 29 and the outer tooth ring 30 fixed to the top of the blade seat 39 are driven to rotate through the rotation of the blade seat 39, when the outer tooth ring 30 rotates, the inner tooth ring 31 engaged with the outer tooth ring 30 is driven to rotate, the middle part of the inner tooth ring 31 is fixed with the rotating rod 33, finally, the rotating rod 33 and the second blade 38 are driven to rotate, so that the negative pressure suction force is generated in the inside of the shell 34, when the strong negative pressure suction force is generated in the inside of the shell 34, not only the backflow rate of the high-temperature airflow in the backflow pipe 20 is accelerated, and the cooling effect of the film blowing pipe 26 on the film body 6 is ensured, but also the high-temperature airflow dead angle at the top of the backflow pipe 20 is avoided, the air with high temperature is timely sucked away, and the cooling effect of the film bubble is ensured.

[0045] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A plastic packaging film production device, comprising a fixing frame (1), a bubble stabilizer (2), an A-shaped frame (4), a squeezing roller (5) and a base (3), characterized in that: A feeding die (8) is fixedly connected to the top of the base (3), and an extrusion die (7) is provided on the top of the feeding die (8). The top outer wall of the extrusion die (7) is respectively fixedly connected to a first circular die (24) and a second circular die (25), and a gap between the first circular die (24) and the second circular die (25) forms a film outlet channel (10); The feeding die (8) and the extrusion die (7) are both provided with an air inlet channel (43) and an exhaust channel (21). The extrusion die (7) is provided with a blow molding groove (17) inside. A return pipe (20) is fixedly connected to the bottom inner wall of the blow molding groove (17). The top outer wall of the second circular ring die (25) is provided with a film blowing assembly. The film blowing assembly includes an annular plate (16) fixedly connected to the bottom inner wall of the blow molding groove (17). The circumferential inner wall of the annular plate (16) is surrounded by the bottom inner wall of the blow molding groove (17) and the circumferential outer wall of the return pipe (20). An air outlet cavity (15), one end of the air inlet channel (43) is located inside the air outlet cavity (15), the inner diameter of the annular plate (16) gradually decreases in a direction away from the feeding die (8), the top outer wall of the second circular ring die (25) is fixedly connected to a film blowing tube (26), the circumferential outer wall of the film blowing tube (26) is provided with circular holes (27) distributed at equal distances, the film blowing tube (26) is located inside the film body (6), the circumferential outer wall of the return pipe (20) is fixedly connected to a bearing seat (18), the circumferential outer wall of the bearing seat (18) is fixedly connected to a blade seat ( 39), the circumferential outer wall of the blade seat (39) is fixedly connected to the first blades (19) distributed in a circular shape at equal distances, the first blades (19) are in the shape of turbofan blades, the first blades (19) are located above the inner part of the annular plate (16), the top outer wall of the blade seat (39) is fixedly connected to the vertical column (29), the end of the vertical column (29) away from the blade seat (39) is fixedly connected to the outer gear ring (30), the circumferential inner wall of the outer gear ring (30) is meshed with the inner gear ring (31), and the top outer wall of the return pipe (20) is fixedly connected to the shell (34), The return pipe (20) is connected to the shell (34), the middle part of the inner gear ring (31) is fixedly connected to a ring plate, the bottom outer wall of the ring plate is fixedly connected to a rotating rod (33), the circumferential outer wall of the rotating rod (33) is fixedly connected to a shaft sleeve (37), the circumferential outer wall of the shaft sleeve (37) is fixedly connected to second blades (38) distributed in a circular shape at equal distances, and the second blades (38) are located inside the shell (34). The top outer wall of the shell (34) is provided with suction grooves (32) distributed in a circular shape at equal distances, and the cross section of the suction grooves (32) is S-shaped.

2. The plastic packaging film production equipment according to claim 1, characterized in that: A material guide channel (9) is provided inside the feeding die (8), and the cross section of the material guide channel (9) is L-shaped. One end of the material guide channel (9) is fixedly connected to a feeding pipe (42), and an annular groove (22) is provided at one end of the material guide channel (9) away from the feeding pipe (42). The cross section of the annular groove (22) is semicircular. An air intake pipe (41) and an exhaust pipe (40) are fixedly connected to the circumferential outer wall of the feeding die (8), respectively. The air intake pipe (41) is connected to the blower through a pipeline, and the air intake channel (43) is connected to the air intake pipe (41). The exhaust channel (43) is connected to the air intake pipe (41). The channel (21) is connected to the exhaust pipe (40), the air inlet channel (43) is connected to the blow molding groove (17), the exhaust channel (21) is connected to the return pipe (20), an extrusion channel (23) is provided inside the extrusion die (7), the extrusion channels (23) are distributed in an equidistant circular pattern inside the feeding die (8), the cross section of the extrusion channels (23) is spiral, the extrusion channels (23) are connected to the feeding assembly, the film outlet channel (10) extends to the inside of the extrusion die (7), and a feeding assembly is provided inside the extrusion die (7).

3. The plastic packaging film production equipment according to claim 2, characterized in that: The feeding assembly includes a gathering channel (13), an ascending channel (14), an extrusion channel (12) and a feeding channel (11) which are opened inside the extrusion die (7); the gathering channel (13), the ascending channel (14), the extrusion channel (12) and the feeding channel (11) are distributed in sequence from the bottom to the top of the extrusion die (7); the gathering channel (13), the ascending channel (14), the extrusion channel (12) and the feeding channel (11) are all interconnected, and the feeding channel (11) is connected to the film outlet channel (10).

4. The plastic packaging film production equipment according to claim 3, characterized in that: The inner diameters of the feeding channel (11) and the ascending channel (14) gradually decrease in the ascending direction, the inner diameter of the extrusion channel (12) first decreases and then increases in the ascending direction, and the inner diameter of the gathering channel (13) remains unchanged in the ascending direction.

5. The plastic packaging film production equipment according to claim 4, characterized in that: A support frame (35) is fixedly connected to the circumferential inner wall of the return pipe (20), an end of the support frame (35) away from the circumferential inner wall of the return pipe (20) is fixedly connected to a rotating seat (36), and an end of the rotating rod (33) away from the ring plate is fixedly connected to the rotating seat (36).

6. The plastic packaging film production equipment according to claim 5, characterized in that: A transmission seat (28) is provided on the circumferential outer wall of the return pipe (20), the circumferential outer wall of the vertical column (29) contacts the circumferential inner wall of the transmission seat (28), and both sides of the transmission seat (28) are fixedly connected to the return pipe (20) and the film blowing pipe (26) respectively.

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