CN114161693A

CN114161693A - Film production system and method for PE packaging bag

Info

Publication number: CN114161693A
Application number: CN202111323821.5A
Authority: CN
Inventors: 谭畅; 张落成
Original assignee: Tianmen Chengchang Plastic Industry Co ltd
Current assignee: Tianmen Chengchang Plastic Industry Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-03-11

Abstract

The invention discloses a film production system for PE packaging bags, and relates to the technical field of packaging bag production; the device comprises a primary mixing mechanism, a material conveying mechanism, a secondary mixing mechanism, an extrusion mechanism, a blow molding mechanism, an exhaust mechanism and a material recovery mechanism; the production method of the film for the PE packaging bag specifically comprises the steps that the bottom end of a mixer in a primary mixing mechanism is arranged below the ground, the top of the mixer is 10-20 cm higher than the ground, and a plurality of secondary mixing mechanisms, an extrusion mechanism and a blow molding mechanism are sequentially arranged at the lower end of a material distribution pipe. According to the invention, the blockage phenomenon caused by the deposition of the bottom of the raw material is effectively avoided, the raw material is guided to enter the spiral mixer through the material supplementing pipe for secondary mixing, the raw material is sequentially distributed into the spiral mixers by continuously changing the opening and closing state of the material distribution assembly, the continuous and uninterrupted raw material mixing and adding operation of a plurality of blow molding machines is realized, and the efficiency of film blow molding processing is improved.

Description

Film production system and method for PE packaging bag

Technical Field

The invention relates to the technical field of packaging bag production, in particular to a film production system and method for a PE packaging bag.

Background

The PE packaging bag is a transparent plastic bag and is used for packaging clothes, bags, electronic products and the like, the thermoplastic resin film bag is prepared by polymerizing ethylene, and the PE packaging bag has excellent low-temperature resistance, good chemical stability, resistance to corrosion of most acid and alkali (resistance to acid with oxidation property), insolubility in common solvents at normal temperature, small water absorption and excellent electrical insulation property; the properties of polyethylene vary from species to species, and depend primarily on molecular structure and density. Different production methods can be adopted to obtain products with different densities.

Polyethylene can be formed by a common thermoplastic plastic forming method, a PE packaging bag is mainly produced by mixing resin particles with additives such as modified materials, the molten raw materials can be fully plasticized and uniformly mixed through pressure and shearing force generated by rotation of a screw in a screw extruder, the PE packaging bag is formed through a blow molding die, the raw materials are mainly packaged in bags in a feeding stage, workers need to convey the raw materials to a spiral mixer for mixing, and due to the height problem of equipment, the workers need to frequently convey, so that the problems of large labor capacity and low efficiency are caused.

In view of the above, the present invention provides a system and a method for producing a film for a PE packaging bag, so as to solve the technical problems in the prior art.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a film production system and method for a PE packaging bag.

The invention provides a film production system for PE packaging bags, which comprises a primary mixing mechanism, a material conveying mechanism, a secondary mixing mechanism, an extrusion mechanism, a blow molding mechanism, an exhaust mechanism and a material recovery mechanism;

the preliminary mixing mechanism comprises a mixer arranged below the ground, a feeding cavity is formed in the end portion of the mixer, a feeding adjusting assembly is arranged on the inner wall of the feeding cavity, the material conveying mechanism comprises a conveying fan arranged at a high position, a vertically arranged feeding pipe is arranged at the inlet end of the conveying fan, the bottom end of the feeding pipe is arranged at the outlet of the feeding adjusting assembly, a material distributing pipe which is arranged in an inclined mode is arranged at the outlet end of the conveying fan, a distributing cavity is formed in the middle of the material distributing pipe, and a material distributing assembly is arranged at the top of the distributing cavity;

the secondary mixing mechanism comprises a spiral mixer, a material supplementing pipe, an emptying pipe assembly and a material supplementing valve, the material supplementing pipe and the emptying pipe assembly are respectively installed at the top of the spiral mixer, the top end of the material supplementing pipe is installed at the bottom of the material supplementing pipe, and the material supplementing valve is installed between the secondary mixing mechanism and the extrusion mechanism;

the extrusion mechanism is composed of a spiral extruder, a melting heater is coated on the outer side of the spiral extruder, the blow molding mechanism comprises a blow mold and a blowing pipe arranged around the blow mold, the blow mold is arranged at an extrusion port of the spiral extruder, the exhaust mechanism comprises a support frame and a plurality of symmetrically distributed exhaust rollers, and the exhaust rollers are distributed at the upper end of the blow mold in an inverted V-shaped structure;

the material recovery mechanism comprises a recovery rack, an exhaust cloth bag and a collection box, wherein the exhaust cloth bag is arranged between the tail end of the material distribution pipe and the collection box, and the collection box is arranged inside the recovery rack.

Preferably, the mixer comprises a mixing frame, two sections of mixing cavities which are distributed in an inclined mode are arranged inside the mixing frame, two mixing augers of a spiral structure are arranged inside the mixing cavities, and a driving motor in transmission connection with the mixing augers is arranged at the bottom end of the mixing frame.

Preferably, the feeding adjusting assembly comprises an adjusting shell, an adjusting gate plate is slidably mounted inside the adjusting shell, an adjusting pull rod is mounted at the top end of the adjusting gate plate, a movable rocker is hinged to the top of the adjusting pull rod, and the side face of the movable rocker is rotatably connected with the inside of the feeding cavity.

Preferably, the emptying pipe assembly comprises a spring ring and a dust removal cloth bag, the spring ring and the dust removal cloth bag are both arranged at the top of the spiral mixer, and the outer side of the dust removal cloth bag is fixedly arranged at the inner side of the spring ring.

In the invention, preferably, the material distribution pipe comprises a metal pipe layer formed by splicing a plurality of sections, and the inner wall of the metal pipe layer is provided with a wear-resistant lining sleeve.

In the invention, preferably, the inner wall of the wear-resistant lining sleeve is provided with a plurality of guide grooves which are distributed spirally, and the cross sections of the guide grooves are distributed in an arc-shaped structure.

Preferably, the material distribution assembly comprises electric push rods arranged on two sides of the distribution cavity and a distribution plate assembly hinged to the inner wall of the distribution cavity, a movable rod is arranged between the top ends of the two electric push rods, and the bottom end of the movable rod extends into the distribution cavity and is hinged to the top of the distribution plate assembly.

In the invention, preferably, the distribution plate component comprises an inner grid screen plate, the outer side of the inner grid screen plate is sleeved with a movable mesh enclosure, and the surfaces of the inner grid screen plate and the movable mesh enclosure are both provided with intercepting meshes which are distributed obliquely.

In the invention, preferably, the inner wall of the top of the distribution cavity is provided with a limit groove, the inner wall of the bottom of the distribution cavity is provided with a sealing groove, and the inner spaces of the limit groove and the sealing groove are matched with the end part of the movable mesh enclosure in size.

The production method of the film for the PE packaging bag comprises the following steps:

the first step is as follows: the bottom end of a mixer in the preliminary mixing mechanism is arranged below the ground, the top of the mixer is 10-20 cm higher than the ground, a plurality of secondary mixing mechanisms, an extruding mechanism and a blowing mechanism are sequentially arranged at the lower end of a material distribution pipe, and a worker directly pours the raw materials into the mixer to fully stir the raw materials.

The second step is that: after the raw materials are completely mixed, a conveying fan in the material conveying mechanism is started, suction force is generated at an outlet of the feeding adjusting assembly, a worker guides the raw materials into the feeding pipe through the feeding adjusting assembly, and plastic particles are sucked and conveyed into the material distribution pipe by means of suction force.

The third step: the raw materials rely on wind-force to flow in the material distribution pipe and carry, intercept the raw materials through material distribution subassembly, carry out the secondary compounding in entering into the spiral blendor through the material supplement pipe guide with the raw materials, through the state of opening and shutting of continuous change material distribution subassembly, distribute the raw materials in proper order to a plurality of spiral blendors.

The fourth step: the leading-in spiral blendor in-process of raw materials, the air of smuggleing secretly is discharged through the evacuation pipe subassembly, drives the evacuation pipe subassembly during air escape and shakes, makes the plastic granules of its inner wall interception fall into the spiral blendor when the feeding clearance in, and then retrieves the raw materials granule smuggleing secretly in the air, avoids the raw materials to break away from spiral blendor.

The fifth step: the raw materials secondarily mixed in the spiral mixer enter the spiral extruder through the material supplementing valve, the PE raw materials in a molten state are formed at the extrusion end of the spiral extruder, and a cylindrical PE packaging bag is formed through a blow molding die.

And a sixth step: after the PE packaging bag is subjected to blow molding, the two sides of the PE packaging bag are extruded through the exhaust rollers on the two sides of the exhaust mechanism, and the air exhausted from the middle part is coiled in a belt shape.

The seventh step: the air at the tail end of the material distribution pipe is filtered by the material recovery mechanism, residual raw material particles in the air are effectively removed, and pollution to the working environment and waste of raw materials are avoided.

Compared with the prior art, the invention provides a film production system and method for PE packaging bags, which have the following beneficial effects:

the bottom end of the mixer is arranged below the ground, the mixer is moved to the upper end of the mixing cavity to be poured when raw materials are added, the mixing auger reversely rotates, the mixing cavity is in two-section inclined distribution, lower-layer raw materials slide downwards under the action of gravity, upper-layer raw materials continuously and upwards surge under the action of the mixing auger, the raw materials are quickly mixed in the surge process, the labor amount of the raw materials when the raw materials are added is effectively reduced, secondly, the material distribution pipe is in inclined distribution, the raw material particles are conveyed inside the material distribution pipe by means of wind power, through the arrangement of the wear-resistant lining sleeve, the collision strength between the raw material particles and the pipe wall is reduced, the friction and pulverization phenomenon of the materials is effectively reduced, the conveying loss of the raw materials is reduced, the problem of noise pollution caused by rigid impact is avoided, spiral air flow is formed on the inner wall of the pipe by the guide of the guide groove, and the pumping and conveying efficiency of the raw material particles is increased, effectively avoid raw materials bottom deposit to cause blocking phenomenon, improve the stability among the raw materials transportation process, the raw materials carries out the secondary compounding through mending the material pipe guide and enter into the spiral blendor, through the state of opening and shutting of continuous change material distribution subassembly, distribute the raw materials to a plurality of spiral blendors in proper order, realize the continuation of many blow molding machines, incessant raw materials mixes, add the operation, need not continuous transport and dispersion and add, improve the efficiency of film blowing processing.

Drawings

FIG. 1 is a schematic structural diagram of a film production system and method for PE packaging bags according to the present invention;

FIG. 2 is a schematic diagram of a mixer structure of the film production system and method for PE packaging bags according to the present invention;

FIG. 3 is a schematic view of a feed adjusting assembly of the film production system and method for PE packaging bags according to the present invention;

FIG. 4 is a schematic diagram of a material distribution pipe structure of the film production system and method for PE packaging bags according to the present invention;

FIG. 5 is a schematic view of the opening structure of the material dispensing assembly of the film production system and method for PE packaging bags according to the present invention;

FIG. 6 is a schematic diagram of a material dispensing assembly closure structure of the film production system and method for PE packaging bags according to the present invention;

FIG. 7 is a schematic view of a distributor plate assembly of the film production system and method for PE packaging bags according to the present invention.

In the figure: 1 mixer, 101 mixing machine frame, 102 mixing cavity, 103 mixing auger, 104 driving motor, 2 feeding cavity, 3 feeding pipe, 4 feeding adjusting component, 401 adjusting shell, 402 adjusting gate, 403 adjusting pull rod, 404 movable rocker, 5 emptying pipe component, 6 blowing pipe, 7 spiral mixer, 8 feeding valve, 9 spiral extruder, 10 blow mould, 11, 12 recovering machine frame, 13 exhaust cloth bag, 14 collecting box, 15 material distributing pipe, 1501 metal pipe layer, 1502 wear-resisting lining sleeve pipe, 1503 diversion trench, 16 distributing cavity, 17 exhaust roller, 18 material distributing component, 1801 sealing groove, 1802 inner grating net plate, 1803 movable net cover, limiting groove, 1805

electric push rod

1804, 1806 movable rod, 19 conveying fan, 20 feeding pipe.

Detailed Description

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-7, the film production system for PE packaging bags comprises a primary mixing mechanism, a material conveying mechanism, a secondary mixing mechanism, an extrusion mechanism, a blow molding mechanism, an exhaust mechanism and a material recovery mechanism;

the preliminary mixing mechanism comprises a mixer 1 arranged below the ground, a feeding cavity 2 is arranged at the end part of the mixer 1, a feeding adjusting component 4 is arranged on the inner wall of the feeding cavity 2, the material conveying mechanism comprises a conveying fan 19 arranged at a high position, a vertically arranged feeding pipe 3 is arranged at the inlet end of the conveying fan 19, the bottom end of the feeding pipe 3 is arranged at the outlet of the feeding adjusting component 4, a material distributing pipe 15 which is obliquely arranged is arranged at the outlet end of the conveying fan 19, a distributing cavity 16 is arranged in the middle of the material distributing pipe 15, and a material distributing component 18 is arranged at the top of the distributing cavity 16;

the secondary mixing mechanism comprises a spiral mixer 7, a material supplementing pipe 20, an emptying pipe assembly 5 and a material supplementing valve 8, the material supplementing pipe 20 and the emptying pipe assembly 5 are respectively installed at the top of the spiral mixer 7, the top end of the material supplementing pipe 20 is installed at the bottom of the material supplementing pipe 20, and the material supplementing valve 8 is installed between the secondary mixing mechanism and the extrusion mechanism;

the extrusion mechanism is composed of a spiral extruder 9, the outer side of the spiral extruder 9 is coated with a melting heater, the blow molding mechanism comprises a blow mold 10 and a blowing pipe 6 arranged around the blow mold 10, the blow mold 10 is arranged at an extrusion port of the spiral extruder 9, the exhaust mechanism comprises a support frame and a plurality of exhaust rollers 17 which are symmetrically distributed, and the exhaust rollers 17 are distributed at the upper end of the blow mold 10 in an inverted V-shaped structure;

the material recovery mechanism comprises a recovery rack 12, an exhaust cloth bag 13 and a collection box 14, wherein the exhaust cloth bag 13 is arranged between the tail end of a material distribution pipe 15 and the collection box 14, and the collection box 14 is arranged inside the recovery rack 12.

As a further proposal of the invention, the material mixing machine 1 comprises a material mixing frame 101, two sections of material mixing cavities 102 which are distributed obliquely are arranged inside the material mixing frame 101, two spiral material mixing augers 103 are arranged inside the material mixing cavities 102, and the bottom end of the material mixing frame 101 is provided with a driving motor 104 which is in transmission connection with a material mixing auger 103, the bottom end of the material mixing machine 1 is arranged below the ground, when the raw materials are added, the raw materials are only required to be moved to the upper end of the mixing cavity 102 to be poured, the mixing auger 103 rotates reversely, the material mixing cavity 102 is distributed in a two-section type inclined way, the lower layer raw material slides downwards under the action of gravity, the upper layer raw material continuously overturns upwards under the action of the material mixing auger 103, the raw materials are quickly mixed in the overturning process, when the feeding is needed, compounding auger 103 forward rotation carries the raw materials granule in lasting to feed adjusting part 4, effectively saves the amount of labour of staff to the raw materials transport.

As a further scheme of the present invention, the feeding adjustment assembly 4 includes an adjustment housing 401, an adjustment shutter 402 is slidably mounted inside the adjustment housing 401, an adjustment pull rod 403 is mounted at the top end of the adjustment shutter 402, a movable rocker 404 is hinged to the top of the adjustment pull rod 403, a side surface of the movable rocker 404 is rotatably connected to the inside of the feeding cavity 2, the height of the adjustment shutter 402 can be adjusted by the movable rocker 404 and the adjustment pull rod 403, an operation end of the movable rocker 404 is located at the upper end of the ground, and a worker can complete adjustment of the feeding flow by lifting and pressing the operation end of the movable rocker 404 when feeding is needed, which is simple and convenient to operate.

As a further scheme in the invention, the emptying pipe assembly 5 comprises a spring ring and a dust removal cloth bag, the spring ring and the dust removal cloth bag are both arranged at the top of the spiral mixer 7, the outer side of the dust removal cloth bag is fixedly arranged at the inner side of the spring ring, air entering the spiral mixer 7 is discharged through the dust removal cloth bag, meanwhile, the dust removal cloth bag is driven by blowing of wind power to vibrate, raw material particles intercepted inside are shaken and fall into the spiral mixer 7, and the recycling of the raw materials is completed.

As a further scheme in the present invention, the material distribution pipe 15 includes a metal pipe layer 1501 formed by splicing a plurality of sections, and an inner wear-resistant bushing 1502 is disposed on an inner wall of the metal pipe layer 1501, the inner wear-resistant bushing 1502 is formed by a tetrafluoro material, raw material particles are conveyed inside the material distribution pipe 15 by wind power, and by the arrangement of the inner wear-resistant bushing 1502, the collision strength between the raw material particles and a pipe wall is reduced, the phenomenon of material friction and pulverization is effectively reduced, the conveying loss of raw materials is reduced, and the problem of noise pollution caused by rigid impact is avoided.

As a further scheme in the present invention, the inner wall of the wear-resistant inner bushing 1502 is provided with a plurality of spirally distributed flow guide grooves 1503, the cross sections of the flow guide grooves 1503 are distributed in an arc structure, and when air flows inside the wear-resistant inner bushing 1502, the spiral air flow is formed on the inner wall of the pipeline by the guidance of the flow guide grooves 1503, so that the blowing and conveying efficiency of raw material particles is increased, the blocking phenomenon caused by the deposition of the bottom of the raw material is effectively avoided, and the stability in the raw material conveying process is improved.

As a still further aspect of the present invention, the material distribution assembly 18 includes electric push rods 1805 installed at both sides of the distribution chamber 16, and a distribution plate assembly hinged to the inner wall of the distribution chamber 16, and a movable rod 1806 is installed between the top ends of the two electric push rods 1805, the bottom end of the movable rod 1806 extends to the inside of the distribution chamber 16 to be hinged with the top of the distribution plate assembly, the internal space of the distribution chamber 16 is distributed in a T-shaped structure, when raw material particles are required to be guided into the feeding pipe 20 at the lower end, the electric push rod 1805 drives the movable rod 1806 to ascend, the distribution plate assembly is lifted to form a grid net structure, the raw material particles and part of air are intercepted and guided into the feeding pipe 20, part of air continuously flows through the meshes on the surface of the distribution plate assembly to complete the distribution operation of the raw materials, meanwhile, the pulverized materials in the raw material particles can be filtered and recovered, and the stability of film production is improved.

As a further scheme of the present invention, the distribution plate assembly includes an inner grid mesh plate 1802, and the outer side of the inner grid mesh plate 1802 is sleeved with a movable mesh enclosure 1803, the surfaces of the inner grid mesh plate 1802 and the movable mesh enclosure 1803 are both provided with intercepting meshes distributed obliquely, the movable mesh enclosure 1803 slides on the outer side of the inner grid mesh plate 1802, when the inner grid mesh plate 1802 and the movable mesh enclosure 1803 are inclined, the intercepting meshes are in a superposed state to filter and intercept material particles, and when the inner grid mesh plate 1802 and the movable mesh enclosure 1803 are flush-fitted with the lower end opening of the distribution chamber 16, the inner grid mesh plate 1802 is inserted into the movable mesh enclosure 1803, so that the intercepting meshes are distributed in a staggered manner, thereby preventing air from entering the feed supplement pipe 20, and further completing the intercepting of the material particles and the blocking of the feed supplement pipe 20 inlet.

As a further scheme in the present invention, the inner wall of the top of the distribution chamber 16 is provided with a limiting groove 1804, and the inner wall of the bottom of the distribution chamber 16 is provided with a sealing groove 1801, the inner spaces of the limiting groove 1804 and the sealing groove 1801 are both matched with the end size of the movable mesh enclosure 1803, and the ends of the distribution plate assembly are respectively embedded into the limiting groove 1804 and the sealing groove 1801 during the opening and closing processes, so as to increase the interception efficiency of the raw material particles and improve the sealing effect on the inlet end of the feed supplement pipe 20.

the first step is as follows: the bottom end of a mixer 1 in the preliminary mixing mechanism is arranged below the ground, the top of the mixer 1 is 10-20 cm higher than the ground, a plurality of secondary mixing mechanisms, an extruding mechanism and a blowing mechanism are sequentially arranged at the lower end of a material distribution pipe 15, and a worker directly pours the raw materials into the mixer 1 to fully stir the raw materials.

The second step is that: after the raw materials are completely mixed, a conveying fan 19 in the material conveying mechanism is started, suction force is generated at an outlet of the feeding adjusting component 4, the worker guides the raw materials into the feeding pipe 3 through the feeding adjusting component 4, and the plastic particles are conveyed into the material distribution pipe 15 in a suction manner.

The third step: the raw materials flow and are conveyed in the material distribution pipes 15 by means of wind power, the raw materials are intercepted by the material distribution assemblies 18, the raw materials are guided to enter the spiral material mixing machines 7 through the material supplementing pipes 20 to be subjected to secondary material mixing, and the raw materials are sequentially distributed to the spiral material mixing machines 7 by continuously changing the opening and closing states of the material distribution assemblies 18.

The fourth step: leading-in spiral blendor 7 in-process of raw materials, the air of smuggleing secretly is discharged through evacuation pipe subassembly 5, drives evacuation pipe subassembly 5 during the air discharge and shakes, makes the plastic granules of its inner wall interception fall into spiral blendor 7 when the feeding clearance in, and then retrieves the raw materials granule of smuggleing secretly in the air, avoids the raw materials to break away from spiral blendor 7.

The fifth step: the raw material secondarily mixed in the screw mixer 7 is fed into the screw extruder 9 through the replenishment valve 8, and a PE raw material in a molten state is formed at the extrusion end of the screw extruder 9, and a cylindrical PE packaging bag is formed by the blow mold 10.

And a sixth step: after the PE packaging bag is blow molded, both sides of the PE packaging bag are squeezed by the air discharging rollers 17 on both sides of the air discharging mechanism, and the air discharged from the middle portion is wound in a band shape.

The seventh step: the material recycling mechanism filters the air at the tail end of the material distribution pipe 15, effectively removes residual raw material particles in the air, and avoids pollution to the working environment and waste of raw materials.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

Film production system for PE wrapping bag, including preliminary compounding mechanism, material conveying mechanism, secondary compounding mechanism, extrusion mechanism, blow molding mechanism, exhaust mechanism and material recovery mechanism, its characterized in that:

the preliminary mixing mechanism comprises a mixer (1) arranged below the ground, a feeding cavity (2) is formed in the end portion of the mixer (1), a feeding adjusting assembly (4) is arranged on the inner wall of the feeding cavity (2), the material conveying mechanism comprises a conveying fan (19) arranged at a high position, a vertically arranged feeding pipe (3) is arranged at the inlet end of the conveying fan (19), the bottom end of the feeding pipe (3) is arranged at the outlet of the feeding adjusting assembly (4), a material distributing pipe (15) arranged in an inclined mode is arranged at the outlet end of the conveying fan (19), a distributing cavity (16) is formed in the middle of the material distributing pipe (15), and a material distributing assembly (18) is arranged at the top of the distributing cavity (16);

the secondary mixing mechanism comprises a spiral mixer (7), a material supplementing pipe (20), an emptying pipe assembly (5) and a material supplementing valve (8), the material supplementing pipe (20) and the emptying pipe assembly (5) are respectively installed at the top of the spiral mixer (7), the top end of the material supplementing pipe (20) is installed at the bottom of the material supplementing pipe (20), and the material supplementing valve (8) is installed between the secondary mixing mechanism and the extruding mechanism;

the extrusion mechanism is composed of a spiral extruder (9), a melting heater is coated on the outer side of the spiral extruder (9), the blow molding mechanism comprises a blow mold (10) and a blowing air pipe (6) arranged around the blow mold (10), the blow mold (10) is arranged at an extrusion opening of the spiral extruder (9), the exhaust mechanism comprises a support frame and a plurality of symmetrically distributed exhaust rollers (17), and the exhaust rollers (17) are distributed at the upper end of the blow mold (10) in an inverted V-shaped structure;

the material recovery mechanism comprises a recovery rack (12), an exhaust cloth bag (13) and a collection box (14), the exhaust cloth bag (13) is arranged between the tail end of the material distribution pipe (15) and the collection box (14), and the collection box (14) is arranged inside the recovery rack (12).
2. The film production system for the PE packaging bag according to claim 1, wherein the mixer (1) comprises a mixing frame (101), two sections of mixing cavities (102) are obliquely distributed in the mixing frame (101), two mixing augers (103) with spiral structures are mounted in the mixing cavities (102), and a driving motor (104) in transmission connection with the mixing augers (103) is arranged at the bottom end of the mixing frame (101).
3. The film production system for PE packaging bags according to claim 1, wherein the feeding adjusting assembly (4) comprises an adjusting shell (401), an adjusting gate plate (402) is slidably mounted inside the adjusting shell (401), an adjusting pull rod (403) is mounted at the top end of the adjusting gate plate (402), a movable rocker (404) is hinged to the top of the adjusting pull rod (403), and the side surface of the movable rocker (404) is rotatably connected with the inside of the feeding cavity (2).
4. The film production system for PE packaging bags according to claim 1, wherein the evacuation tube assembly (5) comprises a spring ring and a dust removal cloth bag, the spring ring and the dust removal cloth bag are both arranged at the top of the spiral mixer (7), and the outer side of the dust removal cloth bag is fixedly arranged at the inner side of the spring ring.
5. The system for producing the thin film for the PE packaging bag as claimed in claim 1, wherein the material distribution pipe (15) comprises a plurality of metal pipe layers (1501) which are spliced, and the inner walls of the metal pipe layers (1501) are provided with wear-resistant lining sleeves (1502).
6. The production system of the PE packaging bag film as claimed in claim 5, wherein the inner wall of the wear-resistant lining sleeve (1502) is provided with a plurality of spirally distributed flow guide grooves (1503), and the cross sections of the flow guide grooves (1503) are distributed in an arc structure.
7. The film production system for PE packaging bags according to claim 1, wherein the material distribution assembly (18) comprises electric push rods (1805) installed at both sides of the distribution chamber (16) and a distribution plate assembly hinged to the inner wall of the distribution chamber (16), and a movable rod (1806) is installed between the top ends of the two electric push rods (1805), and the bottom end of the movable rod (1806) extends to the inside of the distribution chamber (16) and is hinged to the top of the distribution plate assembly.
8. The film production system for PE packaging bags according to claim 7, wherein the distribution plate assembly comprises an inner grid mesh plate (1802), a movable mesh enclosure (1803) is sleeved outside the inner grid mesh plate (1802), and intercepting meshes which are distributed obliquely are arranged on the surfaces of the inner grid mesh plate (1802) and the movable mesh enclosure (1803).
9. The film production system for the PE packaging bag according to claim 8, wherein a limiting groove (1804) is formed in the top inner wall of the distribution cavity (16), a sealing groove (1801) is formed in the bottom inner wall of the distribution cavity (16), and the inner spaces of the limiting groove (1804) and the sealing groove (1801) are matched with the end size of the movable mesh enclosure (1803).
The production method of the film for the PE packaging bag is characterized by comprising the following steps:

the first step is as follows: the bottom end of a mixer (1) in the primary mixing mechanism is arranged below the ground, the top of the mixer (1) is 10-20 cm higher than the ground, a plurality of secondary mixing mechanisms, an extrusion mechanism and a blow molding mechanism are sequentially arranged at the lower end of a material distribution pipe (15), and workers directly pour the raw materials into the mixer (1) so as to fully stir the raw materials;

the second step is that: after the raw materials are completely mixed, a conveying fan (19) in the material conveying mechanism is started, so that suction force is generated at an outlet of a feeding adjusting component (4), a worker guides the raw materials into a feeding pipe (3) through the feeding adjusting component (4), and plastic particles are sucked and conveyed into a material distribution pipe (15) by virtue of the suction force;

the third step: the raw materials are conveyed in the material distribution pipe (15) in a flowing mode by means of wind power, the raw materials are intercepted through the material distribution assembly (18), the raw materials are guided to enter the spiral material mixer (7) through the material supplement pipe (20) for secondary material mixing, and the raw materials are sequentially distributed into the spiral material mixer (7) by continuously changing the opening and closing state of the material distribution assembly (18);

the fourth step: in the process of introducing the raw materials into the spiral mixer (7), entrained air is discharged through the emptying pipe assembly (5), the emptying pipe assembly (5) is driven to shake when the air is discharged, so that plastic particles intercepted by the inner wall of the emptying pipe assembly fall into the spiral mixer (7) in a feeding gap, the raw material particles entrained in the air are recovered, and the raw materials are prevented from being separated from the spiral mixer (7);

the fifth step: the raw materials secondarily mixed in the spiral mixer (7) enter a spiral extruder (9) through a material supplementing valve (8), a PE raw material in a molten state is formed at the extrusion end of the spiral extruder (9), and a cylindrical PE packaging bag is formed through a blow molding die (10);

and a sixth step: after the PE packaging bag is subjected to blow molding, extruding the two sides of the PE packaging bag through exhaust rollers (17) on the two sides of an exhaust mechanism, and exhausting air in the middle to wind the PE packaging bag in a belt shape;

the seventh step: the air at the tail end of the material distribution pipe (15) is filtered by the material recovery mechanism, residual raw material particles in the air are effectively removed, and pollution to the working environment and waste of raw materials are avoided.