Raw material melting device for plastic film production

Abstract

The utility model discloses a raw material melting device for plastic film production, and belongs to the technical field of plastic film production. A stirrer; the heating inner container barrel is used for heating the plastic film raw materials to reach a molten state; the second-stage crushing storage cavity is arranged below the heating inner container barrel and is used for containing molten raw materials subjected to second-stage crushing; the second-stage crushing and rotating assembly is arranged at the upper part of the inner cavity of the second-stage crushing and storing cavity and is used for receiving the primarily crushed molten raw materials falling from the heating inner container barrel; and the second-stage crushing rotating assembly comprises two rotating discs which are symmetrically arranged, a plurality of fixing rods which are fixed between the inner walls of the two rotating discs in an annular array mode, a plurality of crushing blades which are symmetrically welded to the peripheral side of each fixing rod, and a rotating shaft which can drive the two rotating discs to carry the crushing blades to move. Due to the two-stage crushing design, the uniformity and the fineness of raw materials are remarkably improved, the caking phenomenon is reduced, and the melting efficiency and the melting quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to plastic film production technical field especially raw material melting device for plastic film production. BACKGROUND

[0002] Plastic film is made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, which is used for packaging and as a coating layer. Plastic packaging and plastic packaging products account for an increasingly large share of the market, especially composite plastic soft packaging, which has been widely used in food, medicine, chemical industry and other fields.

[0003] In the production process of plastic film, the melting of raw materials is a key step. The traditional plastic film raw material melting device usually adopts single heating and stirring method, which can realize the basic melting function, but has the following shortcomings and problems in actual application: the traditional melting device lacks effective crushing means, and the raw materials are easy to form clumps during melting, which affects the melting effect and the quality of subsequent processing.

[0004] After searching, a raw material melting device for plastic film production is found in the existing Chinese patent publication No. CN213860099U, which includes a tank, a stirring blade movably installed inside the tank, a rotating shaft fixedly installed in the middle of the stirring blade, a motor movably installed at the upper end of the rotating shaft, a partition plate movably installed in the middle of the stirring blade, the partition plate being fixedly installed inside the tank, a heating cavity being formed in the side wall of the tank, and a coil movably installed inside the heating cavity.

[0005] The cited patent literature also has the same problem, the melting device lacks effective crushing means, and the raw materials are easy to form clumps during melting, which affects the melting effect and the quality of subsequent processing. INVENTION CONTENTS

[0006] The utility model aims at providing a raw material melting device for plastic film production to solve the problems in the background art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a raw material melting device for plastic film production, which comprises:

[0008] A melting tank is used for the melting of raw materials for plastic film.

[0009] A stirrer is arranged in the upper part of the inner cavity of the melting tank to preliminarily crush and stir the raw materials for melting.

[0010] A heating liner cylinder is arranged in the upper part of the inner cavity of the melting tank to heat the raw materials of plastic film to a molten state.

[0011] The secondary crushing storage cavity is arranged below the heating inner barrel cylinder and in the lower part of the inner cavity of the melting tank, and is used for containing the secondary crushed molten raw materials;

[0012] The secondary crushing rotating assembly is arranged in the upper part of the inner cavity of the secondary crushing storage cavity and receives the preliminarily crushed molten raw materials falling from the heating inner barrel cylinder, and comprises two symmetrical rotating discs, a plurality of fixed rods fixed in an annular array between the inner walls of the two rotating discs, a plurality of crushing blades symmetrically welded on the circumferential side of each fixed rod, and a rotating shaft capable of driving the two rotating discs to carry the crushing blades to displace.

[0013] Preferably, the rotating shaft is rotatably installed on the upper part of the inner cavity of the secondary crushing storage cavity, and the outer wall of the melting tank is provided with a servo motor.

[0014] Preferably, a connecting sleeve is fixed between the two rotating discs, the connecting sleeve is sleeved on the rotating shaft, the outer wall of the rotating shaft is laterally provided with a stroke sliding groove, and the inner wall of the connecting sleeve is integrally formed with a stroke sliding block, and the stroke sliding block slides in the stroke sliding groove.

[0015] Preferably, a reset spring is symmetrically arranged above the rotating shaft and on one side of the inner wall of the secondary crushing storage cavity, and a gas rod driving part is symmetrically arranged on the other side of the outer wall of the secondary crushing storage cavity.

[0016] Preferably, a support disc is welded on the opposite end of the reset spring and the gas rod driving part, and a limiting ball is rollingly embedded in the opposite side surface of the two support discs.

[0017] Preferably, the outer wall of the opposite side of the two rotating discs is provided with an annular track, when the gas rod driving part pushes the rotating disc, the limiting ball of the gas rod driving part is clamped into one of the annular tracks, and the limiting ball of the reset spring is clamped into the other annular track.

[0018] Preferably, the bottom of the heating inner barrel cylinder is further provided with a discharging pipe, the upper part of the inner cavity of the discharging pipe is provided with an electromagnetic valve, and the lower part of the inner cavity of the discharging pipe is provided with a steel wire filter screen.

[0019] Preferably, the top end of the melting tank is fixed with a top cover, the bottom end is fixed with a bottom cover, the circumferential outer wall of the melting tank is respectively penetrated and connected with a feeding pipe and an auxiliary pipe, and the output ends of the feeding pipe and the auxiliary pipe are extended into the heating inner barrel cylinder.

[0020] Preferably, the top surface of the top cover is welded with a mounting bracket, the stirrer comprises a stirring motor fixedly installed on the top surface of the mounting bracket, a stirring shaft fixedly connected to the output shaft of the stirring motor, and a plurality of stirring blades symmetrically welded on the circumferential outer wall of the stirring shaft.

[0021] Preferably, the bottom end of the stirring shaft is provided with a support rod, and the support rod is provided with a bearing seat at the middle position, and the bearing seat is provided with a bearing in interference fit with the bottom end of the stirring shaft.

[0022] Compared with the prior art, the technical effects and advantages of the utility model are as follows:

[0023] The raw material melting device for plastic film production is characterized in that the raw material is preliminarily crushed and mixed by the stirrer arranged at the upper portion of the inner cavity of the melting tank. This step not only helps to accelerate the melting process of the raw material, but also ensures the uniform distribution of the raw material and improves the melting efficiency. The secondary crushing rotating assembly is arranged at the upper portion of the inner cavity of the secondary crushing storage cavity and receives the preliminarily crushed and melted raw material falling from the heating inner liner cylinder. The raw material is further refined by the crushing blades on the rotating disc to improve the quality of the melted raw material. The two-stage crushing design significantly improves the uniformity and fineness of the raw material, reduces the caking phenomenon, and improves the melting efficiency and quality.

[0024] The rotating disc is displaced and rotated by the servo motor driving rotating shaft. This design enables the falling melted raw material to be uniformly distributed on the crushing blades between the two rotating discs, preventing the raw material from accumulating at the same position. The uniform distribution of the raw material improves the melting efficiency and ensures the uniformity and consistency of subsequent processing.

[0025] The elastic vibration of the rotating disc during displacement is caused by the cooperation of the reset spring and the air rod driving part. This vibration can effectively remove the residues on the crushing blades and the fixing rods, prevent the occurrence of clogging and caking phenomenon, and ensure the long-term stable operation of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0027] Figure 1 It is a structural schematic view of the utility model;

[0028] Figure 2 It is a structural schematic view of the heating inner liner cylinder of the utility model;

[0029] Figure 3 It is a structural schematic view of the secondary crushing storage cavity of the utility model;

[0030] Figure 4The utility model discloses a secondary crushing rotary assembly's structure schematic view of the utility model.

[0031] Figure 5 The utility model discloses a crushing blade's connecting structure schematic view.

[0032] Figure 6 The utility model discloses a bottom cover shell's structure schematic view.

[0033] Mark explanation:

[0034] In the drawing: 1, melting tank, 2, top cover shell, 3, bottom cover shell, 4, mounting support, 5, stirring motor, 6, visual window, 7, feed pipe, 8, auxiliary material pipe, 9, servo motor, 10, support foot, 11, discharge pipe, 12, heating inner bag cylinder, 13, stirring shaft, 14, stirring blade, 15, support rod, 16, detachable side plate, 17, blanking pipe, 18, steel wire filter screen, 19, rotating shaft, 20, secondary crushing rotary assembly, 21, rotating disc, 22, secondary crushing storage cavity, 23, sealing bearing, 24, mounting side plate, 25, return spring, 26, crushing blade, 27, gas rod driving part, 28, support disc, 29, annular track, 30, limit ball, 31, stroke sliding groove, 32, connecting sleeve, 33, connecting rod, 34, fixed rod, 35, stroke sliding block. Specific embodiments

[0035] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, some technical features known in the art are not described to avoid obscuring the utility model.

[0036] Unless the direction defined separately, the directions such as up, down, left, right, front, back, inside and outside involved in the present utility model are based on the directions such as up, down, left, right, front, back, inside and outside in the drawing shown in the utility model, which are explained here.

[0037] The embodiment provides a raw material melting device for plastic film production, as shown in the figure. Figures 1 to 6 The utility model discloses a raw material melting device for plastic film production, which comprises a melting tank 1, a stirrer, a heating inner bag cylinder 12, a secondary crushing storage cavity 22 and a secondary crushing rotary assembly 20.

[0038] In this embodiment, the melting tank 1 is used for the raw material melting of plastic film; the stirrer is arranged in the upper part of the inner cavity of the melting tank 1 to preliminarily crush and stir the raw material melting; the heating inner barrel 12 is arranged in the upper part of the inner cavity of the melting tank 1 to heat the plastic film raw material to achieve the melting state; the heating inner barrel 12 directly contacts and heats the raw material to make the raw material achieve the melting state, which is a component for realizing the raw material melting. The secondary crushing and storing cavity 22 is arranged below the heating inner barrel 12 and in the lower part of the inner cavity of the melting tank 1 to store the secondary crushed and melted raw material.

[0039] In this embodiment, the heating element in the heating inner barrel 12 starts to work to heat the raw material. The heating element in the heating inner barrel 12 is preferably in the form of resistance heating, such as resistance wire heating. The resistance wire generates heat, which heats the inner wall of the heating inner barrel 12 through conduction and radiation. The inner wall of the heating inner barrel 12 transmits the heat to the plastic film raw material inside to gradually heat the plastic film raw material. The raw material achieves the melting state in the heating inner barrel 12.

[0040] In this embodiment, the secondary crushing and rotating assembly 20 is arranged in the upper part of the inner cavity of the secondary crushing and storing cavity 22 and receives the preliminarily crushed and melted raw material falling from the heating inner barrel 12. The secondary crushing and rotating assembly includes two symmetrical rotating discs 21, a plurality of fixed rods 34 fixed in an annular array between the inner walls of the two rotating discs 21, a plurality of crushing blades 26 symmetrically welded on the circumferential side of each fixed rod 34, and a rotating shaft 19 capable of driving the two rotating discs 21 to carry the crushing blades 26 to displace.

[0041] In this embodiment, the raw material in the heating inner barrel 12 is heated and melted to make the raw material in the melting state, which falls out of the heating inner barrel 12 and falls onto the secondary crushing and rotating assembly 20. The preliminarily crushed and melted raw material falls onto the crushing blades 26 to achieve secondary crushing. Not only can the secondary crushing further crush the melted raw material, but also can crush the clumped raw material mixed therein. Through the displacement and rotation of the two rotating discs 21, the falling melted raw material can be uniformly distributed on the crushing blades 26 between the two rotating discs 21, preventing the falling melted raw material from always falling in the same position to cause accumulation, thereby improving the melting efficiency and quality.

[0042] In this embodiment, the rotating shaft 19 is rotatably installed in the upper part of the inner cavity of the secondary crushing and storing cavity 22. The outer wall of the melting tank 1 is provided with a servo motor 9. The output shaft of the servo motor 9 penetrates into the secondary crushing and storing cavity 22 and is connected with one end of the rotating shaft 19. The servo motor 9 provides power for the secondary crushing and rotating assembly 20 to drive the rotating discs 21 and the crushing blades 26 to efficiently crush.

[0043] In this embodiment, the two rotating discs 21 are fixed with a connecting sleeve 32, the connecting sleeve 32 is sleeved on the rotating shaft 19, the outer wall of the rotating shaft 19 is transversely provided with a stroke sliding groove 31, and the inner wall of the connecting sleeve 32 is integrally formed with a stroke sliding block 35, which slides in the stroke sliding groove 31. The cooperation between the stroke sliding groove 31 and the stroke sliding block 35 not only enables the two rotating discs 21 to stably rotate, but also facilitates the linear sliding of the rotating discs 21. Two connecting rods 33 are symmetrically welded on both sides of the connecting sleeve 32 and between the two rotating discs 21.

[0044] In this embodiment, the upper side of the rotating shaft 19 and the inner wall of one side of the secondary crushing storage cavity 22 are symmetrically provided with return springs 25, and the outer wall of the other side of the secondary crushing storage cavity 22 is symmetrically provided with air rod driving members 27. The air rod driving members 27 are extended to push the rotating disc 21 in the rotating state to move, so that the rotating disc 21 moves forward towards the return spring 25 and presses the return spring 25, and when the air rod driving member 27 loses the pushing force, the rotating disc 21 is reset and pushed back under the reaction force of the return spring 25, so as to satisfy the uniform distribution of the falling molten raw materials on the crushing blades 26 between the two rotating discs 21. In addition, when the return spring 25 resets the rotating disc 21, the elastic vibration force can be transmitted to the rotating disc 21 and the crushing blades 26, so as to vibrate the molten raw materials attached to the crushing blades 26 and the fixed rods 34, thereby preventing accumulation and preventing wrapping the crushing blades 26, which affects the normal use of the crushing blades 26. The rear end of the return spring 25 is welded with a mounting side plate 24, the mounting side plate 24 is fixedly embedded into the inner wall of the secondary crushing storage cavity 22, and the both ends of the rotating shaft 19 are connected with the secondary crushing storage cavity 22 through the sealing bearings 23.

[0045] In this embodiment, the return spring 25 and the air rod driving member 27 are welded with support discs 28 at opposite ends, and the opposite sides of the two support discs 28 are rollingly embedded with limiting balls 30. The return spring 25 and the air rod driving member 27 jointly act on the rotating disc 21, and through periodic advancing and resetting movements, the raw materials are uniformly distributed on the crushing blades 26, and the elastic vibration force is used to remove the residues on the crushing blades 26 to prevent blockage. The support disc 28 and the limiting ball 30 ensure that the rotating disc 21 moves stably in the linear direction and avoids deflection. The annular track 29 cooperates with the limiting ball 30 to guide the rotating disc 21 to move along the predetermined path, ensuring the stability and efficiency of the crushing process.

[0046] In the embodiment, the outer wall of the two rotating discs 21 opposite sides is provided with an annular track 29, when the air rod driving element 27 pushes the rotating disc 21, the limiting ball 30 of the air rod driving element 27 is clamped into one of the annular tracks 29, and the limiting ball 30 of the reset spring 25 is clamped into the other annular track 29. When the rotating disc 21 rotates, the two limiting balls 30 cooperate to roll, thereby pushing the rotating disc 21 to move linearly under the condition of ensuring the normal rotation of the rotating disc 21.

[0047] In the embodiment, the bottom of the heating inner cylinder 12 is also provided with a discharging pipe 17, the upper part of the inner cavity of the discharging pipe 17 is provided with a solenoid valve, and the lower part of the inner cavity of the discharging pipe 17 is provided with a steel wire filter screen 18. The discharging pipe 17 is used to deliver the melted raw materials to the next process, and the steel wire filter screen 18 can filter out large particles or impurities that are not completely melted, thereby ensuring the product quality.

[0048] In the embodiment, the top end of the melting tank 1 is fixed with a top cover 2, and the bottom end is fixed with a bottom cover 3. The top cover 2 and the bottom cover 3 provide a closed environment for the melting tank 1, reduce external pollution, and protect the internal components from external damage. The circumferential outer wall of the melting tank 1 is respectively connected with a feeding pipe 7 and an auxiliary material pipe 8. The output ends of the feeding pipe 7 and the auxiliary material pipe 8 extend into the heating inner cylinder 12. The feeding pipe 7 and the auxiliary material pipe 8 are respectively used to add main raw materials and auxiliary materials to the melting tank 1, supporting continuous production and flexible adjustment of the formula. The outer wall of the melting tank 1 is also provided with a viewing window 6, which extends into the heating inner cylinder 12. The viewing window 6 allows the operator to observe the working condition inside the melting tank 1, so as to adjust the working parameters or handle abnormal conditions in time. The outer wall of the melting tank 1 is also provided with a detachable side plate 16 through bolt installation. The servo motor 9 is fixedly installed on the detachable side plate 16. The bottom surface of the bottom cover 3 is symmetrically welded with a plurality of supporting feet 10. The bottom surface of the bottom cover 3 is also connected with a discharging pipe 11 at the center position. The discharging pipe 11 is used to discharge the treated molten raw materials, which is convenient for subsequent processing or storage.

[0049] In the embodiment, the top surface of the top cover 2 is welded with a mounting bracket 4. The stirrer includes a stirring motor 5 fixedly installed on the top surface of the mounting bracket 4, a stirring shaft 13 fixedly connected to the output shaft of the stirring motor 5, and a plurality of stirring blades 14 symmetrically welded to the circumferential outer wall of the stirring shaft 13. The stirring shaft 13 extends longitudinally through the top cover 2 and into the heating inner cylinder 12. The stirring motor 5 provides power to the stirring shaft 13, which preliminarily crushes and mixes the raw materials through the stirring blades 14, so as to accelerate the melting process.

[0050] In the embodiment, the bottom end of the stirring shaft 13 is provided with a support rod 15, the middle position of the support rod 15 is provided with a bearing seat, and the bearing seat is provided with a bearing which is in interference fit with the bottom end of the stirring shaft 13. The two ends of the support rod 15 are welded to the lower inner wall of the heating inner cylinder 12.

[0051] Working principle:

[0052] The plastic film production raw material melting device, first prepare the need to melt the plastic film raw materials and other accessories (according to the actual application for selection). Through the feeding pipe 7 and auxiliary material pipe 8, the raw materials and accessories are added to the melting tank 1. The raw materials and accessories directly enter the inner cavity of the heating inner cylinder 12 through the pipeline. The operator starts the stirring motor 5 installed on the top cover 2, which drives the stirring blade 14 to rotate through the stirring shaft 13. The stirring blade 14 preliminarily crushes and mixes the added raw materials, so that they are uniformly distributed and the melting process is accelerated.

[0053] The heating element in the heating inner cylinder 12 starts to work and heats the raw materials, so that they gradually reach the melting state. When the raw materials are melted in the heating inner cylinder 12, they are discharged through the discharge pipe 17. The electromagnetic valve in the upper part of the discharge pipe 17 is opened to control the flow of the discharge. The molten raw materials are filtered through the steel wire screen 18 to remove possible large particles or impurities and ensure the purity of the raw materials.

[0054] The servo motor 9 starts to work through the rotating shaft 19 to drive the secondary crushing rotating assembly 20. The rotating shaft 19 drives the two rotating discs 21 to rotate, and the fixed rods 34 and crushing blades 26 on the rotating discs 21 crush the molten raw materials discharged from the discharge pipe 17 twice. The air rod driving part 27 extends to push the rotating disc 21 to move, so that it advances towards the return spring 25 and presses the return spring 25. When the air rod driving part 27 loses the pushing force, the reaction force of the return spring 25 resets the rotating disc 21. This process makes the molten raw materials uniformly distributed on the crushing blades 26 between the two rotating discs 21, preventing the raw materials from piling up.

[0055] The elastic vibration generated by the reaction force of the return spring 25 is transmitted to the rotating disc 21 and the crushing blade 26, which helps to remove the residues on the crushing blade 26 and the fixed rod 34, preventing clogging. Through the rotation and linear movement of the rotating disc 21, the molten raw materials are uniformly distributed in the secondary crushing storage cavity 22, ensuring the uniformity and consistency of the raw materials.

[0056] The processed molten raw materials are discharged through the discharge pipe 11 and enter the next process or storage equipment, ready for further processing or use.

[0057] It has to be noted that, in the present document, the terms "comprising", "including", and "having" should be interpreted as specifying the presence of the stated features but not precluding the presence of one or more other features. It should also be noted that, in the present document, the term "or" should be interpreted as the logical or, i.e. requiring at least one of the presented options to be true.

[0058] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A raw material melting device for plastic film production, characterized in that, The utility model relates to a plastic film melting device, which comprises a melting tank (1) for melting raw materials of plastic film, a stirrer arranged in the upper part of the inner cavity of the melting tank (1) for preliminarily crushing and stirring the raw materials, a heating inner cylinder (12) arranged in the upper part of the inner cavity of the melting tank (1) for heating the raw materials of plastic film to melt, a secondary crushing storage cavity (22) arranged below the heating inner cylinder (12) and in the lower part of the inner cavity of the melting tank (1) for storing the secondary crushed molten raw materials, and a secondary crushing rotating assembly (20) arranged in the upper part of the inner cavity of the secondary crushing storage cavity (22) and connected to the preliminarily crushed molten raw materials falling from the heating inner cylinder (12), wherein the secondary crushing rotating assembly (20) comprises two symmetrical rotating discs (21), a plurality of fixed rods (34) arranged in an annular array between the inner walls of the two rotating discs (21), a plurality of crushing blades (26) symmetrically welded on the circumferential side of each fixed rod (34), and a rotating shaft (19) capable of driving the two rotating discs (21) to displace the crushing blades (26). The rotating shaft (19) is rotatably arranged in the upper part of the inner cavity of the secondary crushing storage cavity (22), and the outer wall of the melting tank (1) is provided with a servo motor (9). The two rotating discs (21) are fixed with a connecting sleeve (32) arranged on the rotating shaft (19), the outer wall of the rotating shaft (19) is provided with a stroke sliding groove (31) in the transverse direction, the inner wall of the connecting sleeve (32) is integrally formed with a stroke sliding block (35), and the stroke sliding block (35) slides in the stroke sliding groove (31). The upper part of the rotating shaft (19) and one side of the inner wall of the secondary crushing storage cavity (22) are symmetrically provided with a reset spring (25), and the other side of the outer wall of the secondary crushing storage cavity (22) is symmetrically provided with a gas rod driving part (27). The reset spring (25) and the gas rod driving part (27) are both welded with a support disc (28) at one end, and the opposite side of the two support discs (28) is both rollingly embedded with a limiting ball (30). The outer wall of the opposite side of the two rotating discs (21) is provided with an annular track (29), when the gas rod driving part (27) pushes the rotating disc (21), the limiting ball (30) of the gas rod driving part (27) is clamped in one of the annular tracks (29), and the limiting ball (30) of the reset spring (25) is clamped in the other annular track (29).

2. The raw material melting device for plastic film production according to claim 1, characterized in that: The bottom of the heating inner cylinder (12) is further provided with a discharging pipe (17), the upper part of the inner cavity of the discharging pipe (17) is provided with an electromagnetic valve, and the lower part of the inner cavity of the discharging pipe (17) is provided with a steel wire filter screen (18).

3. The raw material melting device for plastic film production according to claim 2, characterized in that: The top end of the melting tank (1) is fixed with a top cover (2), the bottom end is fixed with a bottom cover (3), the circumferential outer wall of the melting tank (1) is respectively penetrated and connected with a feeding pipe (7) and an auxiliary pipe (8), and the output ends of the feeding pipe (7) and the auxiliary pipe (8) extend into the heating inner cylinder (12).

4. The raw material melting device for plastic film production according to claim 3, characterized in that: ​ 5. The raw material melting device for plastic film production according to claim 4, characterized in that: ​ 6. The raw material melting device for plastic film production according to claim 5, characterized in that: ​ 7. The raw material melting device for plastic film production according to claim 6, characterized in that: ​ 8. The raw material melting device for plastic film production according to claim 7, characterized in that: ​ 9. The raw material melting device for plastic film production according to claim 8, characterized in that: The top surface of the top cover shell (2) is welded with a mounting bracket (4), the stirrer comprises a stirring motor (5) fixedly mounted on the top surface of the mounting bracket (4), a stirring shaft (13) fixedly connected with the output shaft of the stirring motor (5), and a plurality of stirring blades (14) symmetrically welded on the outer wall of the stirring shaft (13).

10. The raw material melting device for plastic film production according to claim 9, characterized in that: The bottom end of the stirring shaft (13) is provided with a support rod (15), and the support rod (15) is provided with a bearing seat at the middle position, and the bearing seat is provided with a bearing in interference fit with the bottom end of the stirring shaft (13).

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