Twin-screw extruder for preparing blow molding packaging film

Abstract

The invention discloses a double-screw extruder for preparing a blow molding packaging film, and relates to the technical field of blow molding packaging film extrusion, the double-screw extruder comprises a frame body, and further comprises a driving mechanism and a stirring assembly which are assembled at the top of the frame body, the periphery of the stirring assembly is connected with two symmetrical rotating assemblies, a heating device is started to heat and plasticize materials, and the rotating assemblies are connected with a screw rod; along with the continuous rotation of the stirring rods, the plasticized materials are rotationally sheared by the stirring rods to realize stirring and mixing, main gears connected with the peripheries of the stirring rods synchronously rotate to drive auxiliary gears meshed with the main gears, so that rotating shafts connected with the auxiliary gears rotate in connecting cylinders; the plasticized materials are also efficiently stirred by the rotating blades on the periphery of the rotating shaft, and it is worthy of noting that the rotating directions of the stirring rods and the rotating blades are opposite, so that the stirring effect is enhanced, the shearing force to the materials is increased, bubbles in the materials are more effectively reduced, and the quality of the materials is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of blown film extrusion for packaging, and particularly to a twin-screw extruder for the preparation of blown packaging films. Background Art

[0002] As a device widely used in the field of plastic processing, the core working principle of a twin-screw extruder is to effectively mix, plasticize, and convey materials through two precisely meshing screws. Especially in the process of preparing blown packaging films, the twin-screw extruder plays a crucial role. However, in actual production, bubble problems may occur inside the device, which is a phenomenon that must be highly regarded.

[0003] The twin-screw extruder mainly relies on the coordinated rotation of the two screws to push the materials forward continuously. At the same time, with the help of an external heating device and the shear heat and frictional heat generated during the rotation of the screws, sufficient plasticization of the materials is achieved. However, if the extrusion pressure of the extruder fluctuates during the plasticization process, it will lead to uneven extrusion volume, and then bubbles will be generated on the surface of the formed film. In addition, if the rotational speed of the screw is set too high, excessive heat energy will be generated due to excessive friction during the extrusion of the material, which is also an important factor inducing the generation of bubbles.

[0004] In addition to the screw rotational speed, the control of the material extrusion speed is equally crucial. Whether the extrusion speed is too fast or too slow may cause unstable flow of the material during extrusion, and then form bubbles. At the same time, the instability of the temperature inside the extruder is also an important reason for the generation of bubbles. Temperature fluctuations may cause uneven heating of the material during extrusion, resulting in insufficient plasticization of some materials, and finally leaving bubbles on the film surface. Summary of the Invention

[0005] The purpose of the present invention is to propose a solution to the problem that if the extrusion pressure of the extruder fluctuates during the plasticization process, it will lead to uneven extrusion volume, and then bubbles will be generated on the surface of the formed film. In addition, if the rotational speed of the screw is set too high, excessive heat energy will be generated due to excessive friction during the extrusion of the material, which is also an important factor inducing the generation of bubbles. In addition to the screw rotational speed, the control of the material extrusion speed is equally crucial. Whether the extrusion speed is too fast or too slow may cause unstable flow of the material during extrusion, and then form bubbles. At the same time, the instability of the temperature inside the extruder is also an important reason for the generation of bubbles. Temperature fluctuations may cause uneven heating of the material during extrusion, resulting in insufficient plasticization of some materials, and finally leaving bubbles on the film surface.

[0006] To achieve the above object, the present invention adopts the following technical solution for a twin-screw extruder used in the preparation of blow-molded packaging films: It includes a frame body, and also includes: a driving mechanism and a stirring assembly assembled on the top of the frame body, and two symmetrically arranged rotating assemblies are connected to the outer periphery of the stirring assembly; The rotating assembly includes a connecting cylinder connected to the outer periphery of the stirring assembly, and a main gear sleeved on the outer periphery of the stirring assembly. The inner wall of the connecting cylinder is rotatably connected to a rotating shaft. The two ends of the rotating shaft are respectively connected with a connecting plate and a limiting block. A sealing gasket is connected between the outer periphery of the rotating shaft and the connecting cylinder. The outer periphery of the rotating shaft is connected with rotating blades, and a secondary gear is connected to the outer periphery of the rotating shaft through a sliding member. One side of the secondary gear is rotatably connected to the stirring assembly through a rotating plate. The main gear and the secondary gear are meshed with each other, and a pushing component is connected to one side of the secondary gear; The driving mechanism drives the stirring assembly to rotate. While the stirring assembly rotates, the main gear drives the secondary gear to drive the rotating shaft to rotate. As the rotating shaft rotates, the rotating blades stir the plastic solution in the stirring assembly, and while stirring, the rotating blades move back and forth under the pushing of the pushing component to squeeze the bubbles existing in the solution.

[0007] As a further description of the above technical solution: The sliding member includes a plurality of sliding grooves opened on the outer periphery of the rotating shaft, and the inner ring of the secondary gear is connected with a sliding block that is slidably connected to the sliding grooves.

[0008] As a further description of the above technical solution: The pushing component includes a pushing rod fixedly connected to one side of the limiting block. A contact block is connected to the outer periphery of the stirring assembly, and the pushing rod is in contact with the contact block. A convex block is connected to one side of the contact block, a groove away from the convex block is opened inside the contact block, and an elastic member is connected to one side of the connecting plate.

[0009] As a further description of the above technical solution: The elastic member includes a plurality of moving grooves opened inside the secondary gear. One side of the connecting plate is fixedly connected with a fixing rod that is slidably connected to the moving grooves, and a telescopic spring is sleeved on the outer periphery of each fixing rod.

[0010] As a further description of the above technical solution: A puncturing component is installed inside the rotating blade. The puncturing component includes a plurality of slotted openings opened inside the rotating blade. A fixing column is fixedly connected between the inner walls of each slotted opening, and a rotating sleeve plate is rotatably connected to the outer periphery of the fixing column.

[0011] As a further description of the above technical solution: The puncturing component further includes a plurality of puncturing heads connected to both sides of the slotted opening.

[0012] As a further description of the above technical solution: The height and length of several of the puncturing heads conform to the arc of the rotating sleeve plate.

[0013] As a further description of the above technical solution: The stirring assembly includes a stirring barrel connected inside the frame body. Two stirring rods are rotatably connected inside the stirring barrel. A feeding port is provided on the outer periphery of the stirring barrel. The two stirring rods are connected to a driving mechanism through a connecting shaft on one side. An extrusion port is provided on one side of the stirring barrel away from the connecting shaft.

[0014] As a further description of the above technical solution: The driving mechanism includes a motor connected to one side of the frame body. An output shaft is connected to one side of the motor.

[0015] As a further description of the above technical solution: The frame body includes a bottom frame, and a support frame is fixedly connected to the top of the bottom frame.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: When operating the device, first add the material into the stirring barrel through the feeding port. Then start the motor, and the output shaft of the motor starts to rotate, driving the two connecting shafts to rotate in opposite directions, thereby driving the stirring rods to push the material to move inside the stirring barrel; At the same time, start the heating device to heat and plasticize the material. As the stirring rods continue to rotate, they perform rotational shearing on the plasticized material to achieve stirring and mixing. The main gears connected to the outer periphery of the stirring rods rotate synchronously, driving the driven gears meshing with them, so that the rotating shafts connected to the driven gears rotate inside the connecting cylinders, and the rotating blades on the outer periphery of the rotating shafts also perform efficient stirring on the plasticized material. It should be noted that the rotating directions of the stirring rods and the rotating blades are opposite. This stirring method not only enhances the stirring effect but also increases the shearing force on the material, more effectively reducing the air bubbles in the material and improving the quality of the material; In addition, the rotation of the driven gear drives the rotating shaft to rotate together, and the pushing rod connected to the limiting block on one side of the rotating shaft also rotates accordingly. When the pushing rod contacts the convex blocks and grooves on the contact block, it will push or pull the rotating shaft to move, so that the rotating shaft not only rotates following the driven gear but also reciprocates within a certain range. This reciprocating movement drives the rotating blades to also reciprocate between the blades of the stirring rods, squeezing the material and further reducing the air bubbles in the material; As the rotating blade rotates and reciprocates, two flow patterns are generated in the plasticized material: a part of the material moves along the space between the stirring rod and the rotating blade, and another part of the material is pushed by the rotating blade into the slotted groove. This continuous pushing flow state generates sufficient power to drive the rotating sleeve plate to rotate, further enhancing the stirring and mixing effect of the material in the slotted groove. At the same time, the puncturing head further processes the bubbles in the flowing material in the slotted groove, significantly reducing the bubble problem in the material. Description of the Drawings

[0017] Figure 1 Shows the overall structural schematic diagram according to the present invention; Figure 2 Shows the internal structural schematic diagram of the mixing barrel according to the present invention; Figure 3 Shows the structural schematic diagram of the stirring rod according to the present invention; Figure 4 Shows the structural schematic diagram of the rotating assembly according to the present invention; Figure 5 Shows the structural schematic diagram of the abutting assembly according to the present invention; Figure 6 Shows the structural schematic diagram of the rotating blade according to the present invention; Figure 7 Shows according to the present invention Figure 6 Partial enlarged view at A in; Figure 8 Shows the structural schematic diagram of the fixed column according to the present invention; Figure 9 Shows the movement trajectory schematic diagram of the stirring rod and the rotating blade according to the present invention.

[0018] Legend Explanation: 10, frame body; 11, bottom frame; 12, support frame; 20, drive mechanism; 21, motor; 22, output shaft; 30, mixing assembly; 31, mixing barrel; 32, feeding port; 33, extrusion port; 34, connecting shaft; 35, stirring rod; 40, rotating assembly; 41, connecting cylinder; 42, main gear; 43, rotating shaft; 431, chute; 44, sub-gear; 441, slider; 45, connecting plate; 46, limiting block; 47, rotating blade; 48, rotating plate; 49, sealing gasket; 50, abutting assembly; 51, abutting rod; 52, contact block; 521, convex block; 522, groove; 53, fixed rod; 531, moving groove; 54, telescopic spring; 60, puncturing assembly; 61, slotted groove; 62, fixed column; 63, rotating sleeve plate; 64, puncturing head. Detailed Description of the Invention

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] As Figures 1 - 9 shown, the twin-screw extruder for the preparation of blow-molded packaging film provided by the present invention includes a frame body 10. The frame body 10 includes a bottom frame 11, and a support frame 12 is fixedly connected to the top of the bottom frame 11. It further includes a driving mechanism 20 and a stirring assembly 30 assembled on the top of the support frame 12. The driving mechanism 20 includes a motor 21 connected to one side of the support frame 12, and an output shaft 22 is connected to one side of the motor 21.

[0021] As Figure 1 、 Figure 2 、 Figure 3 shown, the stirring assembly 30 includes a stirring barrel 31 connected to the inside of the support frame 12. A heating device is installed on the outer periphery of the stirring barrel 31. Two stirring rods 35 are rotatably connected to the inside of the stirring barrel 31. A feeding port 32 is opened on the outer periphery of the stirring barrel 31. The two stirring rods 35 are connected to the output shaft 22 through a connecting shaft 34 on one side. An extrusion port 33 is opened on one side of the stirring barrel 31 away from the connecting shaft 34; During the operation process, first, the material needs to be added into the stirring barrel 31 along the feeding port 32. Subsequently, the motor 21 is started. The motor 21 will drive its output shaft 22 to start rotating. As the output shaft 22 rotates, the two connecting shafts 34 will be driven and rotate in opposite directions. The rotation of these two connecting shafts 34 will further drive the stirring rods 35 to move, and the stirring rods 35 will push the material to move inside the stirring barrel 31; While the material is moving, the heating device is started to complete the heating and plasticizing process of the material. At the same time, as the stirring rods 35 continue to rotate, they will perform rotational shearing on the plasticized material, thereby realizing the stirring and mixing of the plasticized material by the stirring rods 35; Finally, the plasticized, stirred and mixed material will flow out smoothly along the extrusion port 33 under the push of the stirring rods 35, completing the entire operation process.

[0022] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6As shown in the figure, two symmetrical rotating components 40 are connected to the outer periphery of the stirring barrel 31. The rotating component 40 includes a connecting cylinder 41 connected to the outer periphery of the stirring barrel 31, and a main gear 42 sleeved on the outer periphery of the stirring rod 35. The inner wall of the connecting cylinder 41 is rotatably connected to a rotating shaft 43. The two ends of the rotating shaft 43 are respectively connected to a connecting plate 45 and a limiting block 46. A sealing gasket 49 is connected between the outer periphery of the rotating shaft 43 and the connecting cylinder 41. The outer periphery of the rotating shaft 43 is connected to rotating blades 47. Each blade of the rotating blades 47 is arranged between the blades of the stirring rod 35. And a secondary gear 44 is connected to the outer periphery of the rotating shaft 43 through a sliding member. The sliding member includes a plurality of sliding grooves 431 opened on the outer periphery of the rotating shaft 43. The inner ring of the secondary gear 44 is connected to a slider 441 slidably connected to the sliding grooves 431. One side of the secondary gear 44 is rotatably connected to the stirring barrel 31 through a rotating plate 48. The main gear 42 and the secondary gear 44 are meshed with each other. One side of the secondary gear 44 is connected to a pushing component 50; As the stirring rod 35 rotates, the main gear 42 connected to its outer periphery also rotates synchronously. During the rotation of the main gear 42, it further drives the secondary gear 44 meshed with it, so that the rotating shaft 43 connected to the secondary gear 44 starts to rotate inside the connecting cylinder 41. During the rotation of the rotating shaft 43, the rotating blades 47 installed on its outer periphery also efficiently stir the plasticized material accordingly. It should be noted that the rotation directions of the stirring rod 35 and the rotating blades 47 are opposite. This relative rotation stirring method can not only enhance the stirring effect on the plasticized material, but also increase the shearing force on the plasticized material, thereby more effectively reducing the bubbles existing in the plasticized material and improving the quality of the material.

[0023] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 As shown in the figure, the pushing component 50 includes a pushing rod 51 fixedly connected to one side of the limiting block 46. A contact block 52 is connected to the outer periphery of the stirring barrel 31, and the pushing rod 51 is in contact with the contact block 52. A convex block 521 is connected to one side of the contact block 52. A groove 522 away from the convex block 521 is opened inside the contact block 52. An elastic member is connected to one side of the connecting plate 45. The elastic member includes a plurality of moving grooves 531 opened inside the secondary gear 44. A fixing rod 53 slidably connected to the moving grooves 531 is fixedly connected to one side of the connecting plate 45. A telescopic spring 54 is sleeved on the outer periphery of each fixing rod 53. The two ends of the telescopic spring 54 are respectively fixedly connected to the connecting plate 45 and the secondary gear 44; As the auxiliary gear 44 rotates, it drives the rotating shaft 43 to rotate together. During this process, the actuating rod 51 connected to the limiting block 46 on one side of the rotating shaft 43 also rotates accordingly. Since the actuating rod 51 always remains in contact with the contact block 52, the telescopic spring 54 is always in a stretched state; During the rotation of the actuating rod 51, it will come into contact with the convex block 521 and the groove 522 on the contact block 52. When the actuating rod 51 contacts the convex block 521, it will push the limiting block 46 and the rotating shaft 43 connected thereto to move, causing the connecting plate 45 on one side of the rotating shaft 43 to move away from the auxiliary gear 44. At the same time, this movement also causes the fixed rod 53 to slide within the movement groove 531 inside the auxiliary gear 44 and further stretches the telescopic spring 54; When the actuating rod 51 contacts the groove 522, since one end of the telescopic spring 54 is fixedly connected to the auxiliary gear 44, the spring will rebound and pull the connecting plate 45 to move. This movement in turn causes the connecting plate 45 to push the rotating shaft 43 to move together. Therefore, while the rotating shaft 43 rotates following the auxiliary gear 44, it will also reciprocate within a certain range; This reciprocating movement drives the rotating blade 47 to also reciprocate between the blades of the stirring rod 35. In this way, the rotating blade 47 not only stirs the plasticized material but also extrudes the plasticized material in the pushing state. By the back-and-forth extrusion of the rotating blade 47, the bubbles existing in the plasticized material can be further reduced; At the same time, due to the back-and-forth movement of the rotating blade 47, the size of the space between the stirring rod 35 and the rotating blade 47 also changes. This causes the plastic material to exhibit a change in speed according to the size of the space during the pushing process. When the space is small, it can further accelerate the pushing of the plasticized material. This way of pushing that alternates between fast and slow also helps to reduce the possible adhesion problem.

[0024] As Figure 1 、 Figure 2 、 Figure 4 、 Figure 6 、 Figure 7 、 Figure 8 As shown, a puncturing assembly 60 is installed inside the rotating blade 47. The puncturing assembly 60 includes a plurality of slots 61 opened inside the rotating blade 47. A fixing column 62 is fixedly connected between the inner walls of each slot 61. A rotating sleeve plate 63 is rotatably connected to the outer periphery of the fixing column 62. The puncturing assembly 60 further includes a plurality of puncturing heads 64 connected to both sides of the slot 61. The heights and lengths of the plurality of puncturing heads 64 conform to the arc of the rotating sleeve plate 63; As the rotating blade 47 rotates, it moves back and forth between the blades of the stirring rod 35. This action causes the plasticized material to have two flow modes: a part of the plasticized material moves along the space between the stirring rod 35 and the rotating blade 47, while the other part of the plasticized material is effectively guided into the slot 61 under the driving force of the rotating blade 47. Since the plasticized material is in this continuous driving flow state, it will generate sufficient power to drive the rotating sleeve plate 63 to rotate together. The rotation of the rotating sleeve plate 63 further enhances the stirring and mixing effect of the plasticized material in the slot 61. At the same time, as the rotating sleeve 63 rotates and moves, the plasticized material will continue to flow along the space between the rotating sleeve 63 and the piercing head 64. In this process, the piercing head 64 plays a key role. It can further process the bubbles existing in the plasticized material flowing in the groove 61, thereby greatly reducing the bubble problem in the plasticized material. Such a design not only improves the mixing efficiency of the plasticized material, but also significantly improves its quality.

[0025] Working principle: First, the material is added into the mixing barrel 31 through the feed port 32, and then the motor 21 is started. The motor 21 drives the output shaft 22 to rotate, driving the two connecting shafts 34 to rotate in opposite directions, and then drives the stirring rod 35 to move the material. At the same time, the heating device is started to heat and plasticize, and the stirring rod 35 rotates continuously to perform rotary shearing and stirring and mixing on the plasticized material. The peripheral main gear 42 of the stirring rod 35 rotates synchronously, driving the sub-gear 44 meshing with it, so that the connected rotating shaft 43 rotates in the connecting barrel 41, and the rotating blades 47 on the rotating shaft 43 efficiently stir the material. The relative rotation of the stirring rod 35 and the rotating blades 47 enhances the stirring effect and shear force, effectively reduces bubbles, and improves the quality of the material. The rotation of the secondary gear 44 drives the rotating shaft 43 and the abutting rod 51 connected to the stop block 46 to rotate, and the abutting rod 51 contacts the protrusion 521 and the groove 522 on the contact block 52, resulting in movement and rebound, so that the rotating shaft 43 reciprocates within a certain range. This reciprocating movement causes the rotating blade 47 to reciprocate between the blades of the stirring rod 35, stirring and squeezing the material, further reducing bubbles; The rotation and reciprocating movement of the rotating blade 47 cause the plasticized material to produce two flow patterns. A part of the material moves along the space between the stirring rod 35 and the rotating blade 47, and the other part of the material is pushed into the slot 61 by the rotating blade 47. The continuous flow of the material drives the rotating sleeve 63 to rotate, thereby enhancing the stirring and mixing effect of the material in the slot 61. At the same time, the rotating sleeve 63 and the piercing head 64 further process the material, significantly reducing the bubble problem and improving the mixing efficiency and quality.

[0026] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A twin-screw extruder for preparing a blow-molded packaging film, comprising a frame (10), characterized in that: Also includes: A driving mechanism (20) and a stirring assembly (30) are mounted on the top of the frame (10), and the outer periphery of the stirring assembly (30) is connected to two symmetrical rotating assemblies (40); The rotating assembly (40) comprises a connecting tube (41) connected to the outer periphery of the stirring assembly (30), and a main gear (42) sleeved on the outer periphery of the stirring assembly (30); the inner wall of the connecting tube (41) is rotatably connected to a rotating shaft (43); two ends of the rotating shaft (43) are respectively connected to a connecting plate (45) and a stop block (46); a sealing gasket (49) is connected between the outer periphery of the rotating shaft (43) and the connecting tube (41); a rotating blade (47) is connected to the outer periphery of the rotating shaft (43); and the outer periphery of the rotating shaft (43) is connected to a sub-gear (44) via a sliding member; one side of the sub-gear (44) is rotatably connected to the stirring assembly (30) via a rotating plate (48); the main gear (42) and the sub-gear (44) are meshingly connected; and one side of the sub-gear (44) is connected to a moving assembly (50); The stirring assembly (30) is driven to rotate by the driving mechanism (20). While the stirring assembly (30) is rotating, the main gear (42) drives the sub gear (44) to drive the rotating shaft (43) to rotate. As the rotating shaft (43) rotates, the rotating blades (47) stir the plastic solution in the stirring assembly (30). While stirring, the rotating blades (47) are moved back and forth by the abutment of the abutment assembly (50), thereby squeezing out bubbles in the solution.

2. The twin-screw extruder for preparing a blow molding packaging film according to claim 1, characterized in that: The sliding member comprises a plurality of sliding grooves (431) formed on the outer circumference of the rotating shaft (43), and the inner ring of the secondary gear (44) is connected to a sliding block (441) which is slidably connected to the sliding grooves (431).

3. The twin-screw extruder for preparing a blow molding packaging film according to claim 1, characterized in that: The abutting assembly (50) comprises an abutting rod (51) fixedly connected to one side of the limit block (46); a contact block (52) is connected to the outer periphery of the stirring assembly (30); the abutting rod (51) and the contact block (52) are in contact with each other; a protrusion (521) is connected to one side of the contact block (52); a groove (522) is formed inside the contact block (52) and is away from the protrusion (521); and an elastic member is connected to one side of the connecting plate (45).

4. The twin-screw extruder for preparing a blow molding packaging film according to claim 3, characterized in that: The elastic member comprises a plurality of movable grooves (531) formed inside the secondary gear (44); a fixed rod (53) slidably connected to the movable groove (531) is fixedly connected to one side of the connecting plate (45); and a telescopic spring (54) is sleeved on the outer circumference of each fixed rod (53).

5. The twin-screw extruder for preparing a blow molding packaging film according to claim 1, characterized in that: A puncture assembly (60) is installed inside the rotating blade (47). The puncture assembly (60) comprises a plurality of slots (61) formed inside the rotating blade (47). A fixing column (62) is fixedly connected between the inner walls of each slot (61). A rotating sleeve (63) is rotatably connected to the outer periphery of the fixing column (62).

6. The twin-screw extruder for preparing a blow molding packaging film according to claim 5, characterized in that: The puncturing assembly (60) further comprises a plurality of puncturing heads (64) connected to both sides of the slot (61).

7. The twin-screw extruder for preparing a blow molding packaging film according to claim 6, characterized in that: The heights and lengths of the plurality of puncturing heads (64) fit the curvature of the rotating sleeve plate (63).

8. The twin-screw extruder for preparing a blow molding packaging film according to claim 1, characterized in that: The stirring assembly (30) comprises a stirring barrel (31) connected to the inside of the frame (10); two stirring rods (35) are rotatably connected to the inside of the stirring barrel (31); a feeding port (32) is provided on the outer periphery of the stirring barrel (31); the two stirring rods (35) are connected to the driving mechanism (20) via a connecting shaft (34) on one side; and an extrusion port (33) is provided on a side of the stirring barrel (31) away from the connecting shaft (34).

9. The twin-screw extruder for preparing a blow molding packaging film according to claim 1, characterized in that: The driving mechanism (20) comprises a motor (21) connected to one side of the frame (10), and an output shaft (22) is connected to one side of the motor (21).

10. The twin-screw extruder for preparing a blow molding packaging film according to claim 1, characterized in that: The frame body (10) comprises a base frame (11), and a support frame (12) is fixedly connected to the top of the base frame (11).

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