PE particle extrusion molding structure

Abstract

The utility model relates to a PE particle extrusion molding structure which comprises a single-screw extruder with one end provided with a hopper, the side wall of the upper end of the hopper is provided with a feeding pipe facilitating inputting of PE particles, a stirring assembly is arranged in the hopper, the stirring assembly comprises a first stirring shaft which is vertically arranged, and a second stirring shaft which is vertically arranged is arranged on the first stirring shaft. The first stirring shaft is driven by a stirring motor installed on the top of the hopper to rotate, and spiral stirring blades are fixed to the outer surface of the first stirring shaft. The single-screw extruder is reasonable in structural design, the stirring component is arranged in the hopper of the single-screw extruder, so that the primarily mixed PE particles can be secondarily mixed, the secondarily mixed PE particles can be extruded and molded, and the PE particles are more uniformly mixed, so that the extrusion molding quality is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of PE particle extrusion forming structures. BACKGROUND

[0002] PE film is the simplest structure of high molecular organic compound, the most widely used polymer material in today's world. The biggest advantage of PE protective film is that the protected product is not polluted, corroded, scratched in the production and processing, transportation, storage and use process, protects the original smooth and bright surface, so as to improve the quality of product and market competitiveness.

[0003] At present, in the production of PE film, various PE particle raw materials are first mixed by mixing equipment, then transported to the hopper of single screw extruder, and then extruded by single screw extruder to obtain PE film. However, in the current single screw extruder, the hopper is not provided with a stirring structure. Since the mixing equipment is used to mix a large amount of PE particle raw materials, the mixing effect is not ideal. When the mixed PE particle raw materials are transported to the hopper of the single screw extruder, if secondary mixing is carried out in the hopper, the mixing uniformity will be further improved, and the subsequent extrusion forming quality will be improved. SUMMARY

[0004] The utility model makes improvements in view of the above problems in the prior art, that is, the technical problem to be solved by the utility model is to provide a PE particle extrusion forming structure.

[0005] In order to achieve the above purpose, the utility model adopts the technical scheme that a PE particle extrusion forming structure comprises a single screw extruder provided with a hopper at one end, the upper end side wall of the hopper is provided with a feeding pipe for feeding PE particles, and a stirring assembly is arranged in the hopper.

[0006] Further, the first stirring shaft is located in the middle of the hopper, a plurality of second stirring shafts are arranged on the outer periphery of the first stirring shaft, the second stirring shafts are circumferentially distributed around the axis of the first stirring shaft, the outer surface of each second stirring shaft is fixed with a plurality of stirring rods which are spaced apart along the axial direction of the second stirring shaft, and the stirring rods are distributed perpendicularly to the second stirring shafts.

[0007] Further, the upper end of the first stirring shaft is provided with a first gear arranged horizontally, the upper end of each second stirring shaft is provided with a second gear arranged horizontally, and the first gear is engaged with the second gear at the upper end of each second stirring shaft.

[0008] Further, the single screw extruder has a plurality of working sections along the axial direction thereof, a plurality of protective covers are arranged on the outer side of the barrel of the single screw extruder and are spaced along the axial direction thereof, the plurality of protective covers correspond to the positions of the plurality of working sections, and the inside of each protective cover is provided with an electromagnetic coil arranged on the outer side of the working section.

[0009] Further, a plurality of cooling fans are arranged below the barrel of the single screw extruder and correspond to the positions of the plurality of protective covers, and the cooling fans are used to send air to the inside of the protective cover to blow and cool.

[0010] Further, the inside of the protective cover is provided with an annular air supply pipe, the annular air supply pipe is annularly arranged on the outer side of the working section, the lower end of the annular air supply pipe is in communication with the air outlet end of the cooling fan, the inner circumferential side wall of the annular air supply pipe is circumferentially provided with a plurality of air outlets, and the air outlets are radially arranged towards the barrel along the annular air supply pipe.

[0011] Compared with the prior art, the single screw extruder has the following effects: the structure is reasonable, the stirring assembly is arranged in the hopper of the single screw extruder, the PE particles after primary mixing are conveniently mixed again, the PE particles after secondary mixing are extruded and formed again, the mixing of the PE particles is more uniform, and the extrusion forming quality is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 is a front view of the structure of the embodiment one of the utility model;

[0013] Fig. 2 is a structure diagram of the hopper in the embodiment one of the utility model;

[0014] Fig. 3 is a structure diagram of the annular air supply pipe in the embodiment one of the utility model;

[0015] Fig. 4 is a top view of the structure of the embodiment two of the utility model;

[0016] Fig. 5 is a side view of the structure of the embodiment two of the utility model;

[0017] Fig. 6 is a partial structure diagram of the flue gas discharge box in the embodiment two of the utility model. DETAILED DESCRIPTION

[0018] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0019] In the description of the utility model, need understanding is, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" orientation or positional relationship indicated in the drawing is based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the utility model, and it is not indicated or implied that the device or element must have a particular orientation, a particular orientation configuration and operation, therefore it can not be understood as a limitation on the utility model.

[0020] Embodiment one: as Figs. 1-3 The utility model discloses a PE particle extrusion forming structure, including the single screw extruder 1 that left end feed inlet place is provided with hopper 2, and the single screw extruder horizontal lateral arrangement is set up, the upper end lateral wall of hopper 2 is provided with the feed pipe 3 of facilitating the input PE particle after preliminary mixing, and the inside of hopper 2 is provided with stirring assembly 4, the stirring assembly 4 includes the first stirring shaft 5 of vertical setting, the first stirring shaft 5 is rotated by the stirring motor 6 of installing at the top of hopper 2 and is driven, and the outer surface of first stirring shaft 5 is fixed with spiral stirring vane 7. When working, the PE particle after mixing after mixing equipment previously enters into the hopper through the feed pipe, and the spiral stirring vane is rotated to the PE particle in the inside of hopper by the first stirring shaft driven by the stirring motor, and the spiral stirring vane mixes the PE particle in the inside of hopper. By setting stirring assembly in the hopper of single screw extruder, it is convenient for the secondary mixing of the PE particle after preliminary mixing, and the PE particle after secondary mixing is extruded again, and since the PE particle mixing is more uniform, the extrusion forming quality is effectively improved.

[0021] In the embodiment, the first stirring shaft 5 is located in the middle of the hopper 2 and is coaxially arranged with the hopper, three second stirring shafts 8 are arranged on the outer periphery of the first stirring shaft 5, the three second stirring shafts 8 are uniformly distributed around the axis of the first stirring shaft 5, a plurality of stirring rods 9 are fixed on the outer surface of each second stirring shaft 8 and are uniformly distributed along the axial direction of the second stirring shaft 8, the stirring rods 9 are perpendicular to the second stirring shaft 8, and the second stirring shaft rotates to drive the stirring rods to rotate, and the stirring rods stir the PE particles. By arranging the second stirring shaft outside the first stirring shaft, the first stirring shaft and the second stirring shaft both stir the PE particles in the hopper, and the stirring and mixing effect is improved.

[0022] In the embodiment, the upper end of the first stirring shaft 5 is provided with a horizontally arranged first gear 10, the upper end of each second stirring shaft 8 is provided with a horizontally arranged second gear 11, and the first gear 10 is engaged with the second gear 11 at the upper end of each second stirring shaft 8. In operation, the stirring motor drives the first stirring shaft to rotate, the first stirring shaft drives the first gear to rotate, the first gear simultaneously drives the second gears at the upper ends of the three second stirring shafts to rotate, and the second gears drive the second stirring shafts to rotate, so as to realize the simultaneous rotation of the first stirring shaft and the second stirring shafts.

[0023] In the embodiment, the single-screw extruder 1 has a plurality of working sections 12 along the axial direction thereof, a plurality of circular protective covers 14 are arranged outside the barrel 13 of the single-screw extruder 1 and are spaced along the axial direction thereof, the plurality of protective covers 14 correspond to the positions of the plurality of working sections 12, one protective cover is arranged outside each working section, and an electromagnetic coil 15 is arranged inside each protective cover 14 and is arranged outside the position corresponding working section 12. In operation, the electromagnetic coil is energized to heat the position corresponding working section. Further, a temperature sensor is arranged on each working section, and the temperature sensor is connected to the electromagnetic coil through a control unit to control the heating temperature.

[0024] At present, the single-screw extruder usually adopts an electric heating ring to generate heat, and the heat is transmitted to the barrel of the single-screw extruder through contact conduction. At this time, only the heat close to the inner side of the barrel surface is transmitted to the barrel, and most of the heat outside is lost to the air, thereby resulting in low heating efficiency. In the embodiment, the electromagnetic coil is adopted for heating, the molecules inside the working section are directly heated by magnetic energy, the heat loss to the air outside the working section is reduced, and the uniformity and efficiency of heating are improved.

[0025] In the embodiment, a plurality of cooling fans 16 are arranged below the barrel 13 of the single-screw extruder 1, the plurality of cooling fans 16 correspond to the positions of the plurality of protective covers 14, and the cooling fan 16 is used to send air to the inside of the protective cover 14 to blow and cool the screw inside the working section.

[0026] In the embodiment, an annular air supply pipe 17 is arranged inside the protective cover 14, the annular air supply pipe 17 is arranged outside the working section 12 and also outside the electromagnetic coil, the lower end of the annular air supply pipe 17 is connected to the air outlet end of the cooling fan 16, a plurality of air outlets 18 are uniformly distributed on the inner circumferential side wall of the annular air supply pipe 17, and the air outlets 18 are arranged to send air to the barrel 13 along the radial direction of the annular air supply pipe. In operation, the cooling fan sends air into the annular air supply pipe, and the airflow in the annular air supply pipe blows to the barrel through the air outlets. The air supply pipe arranged outside the working section is used for air supply and cooling, so that the entire outer periphery of the working section can be effectively blown, the uniformity of cooling is improved, and the local cooling of the working section is prevented from being too fast or too slow.

[0027] It should be noted that single-screw extruders are existing mature products. This utility model adds a stirring component to the hopper of an existing single-screw extruder, uses an electromagnetic coil to heat the working section, and adds an annular air supply pipe, etc. The specific structure and extrusion principle of the single-screw extruder will not be repeated here.

[0028] Example 2: Figs. 4-6 As shown, this embodiment is based on embodiment one, using multiple single-screw extruders 1 working together to form a multi-layer co-extrusion film production line to produce PE film. Specifically: four single-screw extruders 1 are distributed longitudinally at intervals, and the extrusion ends of the four single-screw extruders are connected to a distributor 20 through a pipeline 19. A co-extrusion die 21 is arranged parallel below the distributor 20, and a cooling roller 22 is arranged parallel below the co-extrusion die 21.

[0029] In this embodiment, a flue gas emission box 23 is disposed directly above the distributor 20. Multiple parallel flue gas emission pipes 24 are connected between the bottom of the flue gas emission box 23 and the top of the distributor 20. The flue gas on the distributor 20 is discharged into the flue gas emission box 23 through the flue gas emission pipes 24. One end of the flue gas emission box 23 is connected to the inlet of a flue gas emission fan 26 via an outlet pipe 25. The flue gas emission fan 26 discharges the flue gas from the flue gas emission box. The outlet of the flue gas emission fan is connected to a flue gas treatment device via a pipeline, allowing the subsequent flue gas treatment device to treat the flue gas.

[0030] In this embodiment, a flue gas filter element 27 is provided at one end of the flue gas emission box 23 near the output pipe. The flue gas filter element 27 includes multiple filter screens 28 spaced apart along the flue gas flow direction, with the mesh size of the multiple filter screens decreasing sequentially along the flue gas flow direction. During operation, the flue gas flows through the multiple filter screens sequentially before entering the conveying pipe, and the multiple filter screens filter the solid particles in the flue gas.

[0031] In this embodiment, the side of the flue gas filter 27 facing the output pipe is provided with an activated carbon plate layer 29 to adsorb particulate matter in the flue gas and achieve the purpose of smoke removal.

[0032] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).

[0033] In addition, the terms used to represent the positional relationship or shape in any of the technical solutions of the present application have the meaning including the approximate, similar or close state or shape unless otherwise stated.

[0034] Any component provided by the present application can be assembled from multiple individual components, or can be a single component manufactured by an integral forming process.

[0035] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: the specific embodiments of the present application can still be modified or some technical features can be replaced by equivalent; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application claimed.

Claims

1. A PE pellet extrusion molding structure comprising a single screw extruder provided with a hopper at one end, characterized in that: The upper end side wall of the hopper is provided with a feeding pipe for facilitating the input of PE particles, and the interior of the hopper is provided with a stirring assembly, which comprises a first stirring shaft arranged vertically and driven to rotate by a stirring motor mounted on the top of the hopper, and a helical stirring blade is fixed to the outer surface of the first stirring shaft.

2. A PE pelletized extruded structure according to claim 1, characterized in that: The first stirring shaft is located in the middle of the hopper, and a plurality of second stirring shafts are arranged on the outer periphery of the first stirring shaft, which are uniformly distributed around the axis of the first stirring shaft, and a plurality of stirring rods are fixed to the outer surface of each second stirring shaft and are uniformly distributed along the axial direction of the second stirring shaft, and the stirring rods are distributed vertically to the second stirring shaft.

3. A PE pellet extruded structure according to claim 2, characterized in that: The upper end of the first stirring shaft is provided with a first gear arranged horizontally, and the upper end of each second stirring shaft is provided with a second gear arranged horizontally, and the first gear is engaged with the second gear at the upper end of each second stirring shaft.

4. The PE pelletized extruded structure of claim 1, wherein: The single screw extruder has a plurality of working sections along its axial direction, and a plurality of protective covers are arranged on the outer side of the barrel of the single screw extruder and are uniformly distributed along the axial direction, and the positions of the plurality of protective covers correspond to the positions of the plurality of working sections, and an electromagnetic coil is arranged in each protective cover and is arranged on the outer side of the working section.

5. A PE pellet extruded structure according to claim 4, characterized in that: A plurality of cooling fans are arranged below the barrel of the single screw extruder, and the positions of the plurality of cooling fans correspond to the positions of the plurality of protective covers, and the cooling fans are used to blow air into the interior of the protective cover for blowing and cooling.

6. A PE pellet extruded structure according to claim 5, characterized in that: The interior of the protective cover is provided with an annular air supply pipe, which is arranged on the outer side of the working section, and the lower end of the annular air supply pipe is connected to the air outlet end of the cooling fan, and a plurality of air outlets are uniformly distributed on the inner circumferential wall of the annular air supply pipe, and the air outlets blow air towards the barrel along the radial direction of the annular air supply pipe.

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