A high-efficiency film blowing machine special for biodegradable plastics

Abstract

The utility model provides a kind of high -efficient film blowing machine special for biodegradable plastics, including film blowing machine main body, further include: screening shell, the screening shell is set in the upper of the feed hopper of film blowing machine main body;Screening structure, the screening structure is set in screening shell. It is convenient to better guarantee the plastic particle granule uniformity of feed by screening cylinder and arc screen mesh, avoid the existence of too big and too small plastic particle granule, influence the film blowing quality of film blowing machine, the side wall of screening cylinder is knocked by knocking plate in the application, it is convenient to better knock and clean screening cylinder, avoid that plastic particle is jammed in mesh, influence the screening efficiency of screening cylinder, arc screen mesh is knocked by knocking block, it is convenient to better knock and clean arc screen mesh cylinder, avoid that plastic particle is jammed in mesh, influence the screening efficiency of arc screen mesh.

Description

Technical Field

[0001] This utility model relates to the field of blown film machine technology, and in particular to a high-efficiency blown film machine specifically for biodegradable plastics. Background Technology

[0002] A biodegradable plastic blown film machine is a specialized device for producing biodegradable plastic films. It heats and melts biodegradable plastic particles, then blows them into films. It is suitable for various biodegradable materials such as PLA, PBTA, and starch / calcium powder mixtures.

[0003] In conventional biodegradable plastic blown film machines, the lack of a screening structure in the feed hopper makes it difficult to ensure the uniformity of the plastic particles used for feeding. This results in the presence of excessively large or small plastic particles. Smaller particles, due to their larger surface area, melt more easily, leading to localized overheating. Larger particles, on the other hand, are more prone to forming incompletely plasticized hard cores due to delayed heating, thus affecting the quality of the blown film. Therefore, ensuring the uniformity of the fed plastic particles is a crucial issue that needs to be addressed in the design of high-efficiency blown film machines specifically designed for biodegradable plastics. Utility Model Content

[0004] This invention addresses the problem of ensuring uniformity of plastic particles used for feeding by providing a high-efficiency blown film machine specifically for biodegradable plastics.

[0005] This utility model solves the above-mentioned technical problems through the following technical solutions: This utility model provides a high-efficiency blown film machine specifically for biodegradable plastics, including a blown film machine body, and further comprising: A screening shell is disposed above the feed hopper of the blown film machine body; A screening structure is disposed within a screening housing; A striking structure one is disposed within a screening structure; A second striking structure is provided below the screening structure. The first striking structure and the second striking structure are used to clean the screening structure by striking it. A blocking structure is provided below the screening structure.

[0006] Preferably, four support rods are fixedly connected to the side wall of the bottom plate of the blown film machine body, and two support plates are fixedly connected to the top of the four support rods. The screening shell is rotatably connected between the two support plates through a rotating shaft. A motor is fixedly connected to the side wall of the support plate, and the rotating end of the motor is fixedly connected to the rotating shaft of the screening shell.

[0007] In this technical solution, the rotation of the motor drives the screening shell to rotate and tilt.

[0008] Preferably, the screening structure includes a screening cylinder, a pusher plate, a fixed frame, an arc-shaped screen, a rotating gear one, a motor two, and a support frame. The fixed frame and the arc-shaped screen are fixedly connected to the inner wall of the screening shell. The bottom of the fixed frame is connected to the top of the arc-shaped screen. The screening cylinder is rotatably connected to the fixed frame and the inner wall of the screening cylinder. The end of the rotating shaft of the screening cylinder passes through the side wall of the screening shell and is fixedly connected to the rotating gear one. The support frame is fixedly connected to the back side wall of the screening shell. The motor two is fixedly connected to the side wall of the support frame. The rotating end of the motor two is fixedly connected to the rotating gear one. Pusher plates are fixedly connected at equal intervals to the side wall of the screening cylinder.

[0009] In this technical solution, the rotation of motor two drives the rotation of gear one, which in turn drives the screening cylinder and transmission gear to rotate. The screening cylinder drives the pusher plate to rotate, and the rotation of the screening cylinder causes the plastic particles inside to roll and be screened. Plastic particles that are too large cannot pass through the mesh of the screening cylinder and fall out, remaining inside the screening cylinder. Other plastic particles fall onto the arc-shaped screen below. The rotation of the pusher plate pushes the plastic particles on the arc-shaped screen to move and tumble them, causing the arc-shaped screen to screen the plastic particles. This allows plastic particles that are too small to pass through the mesh of the arc-shaped screen and be screened out, falling onto the bottom inner wall of the screening shell, thus making the plastic particles remaining on the arc-shaped screen uniform.

[0010] Preferably, the pusher plates on the upper and lower sides of the screening cylinder are staggered, the pusher plates on the left and right sides of the screening cylinder are staggered, and the mesh size of the arc-shaped screen is smaller than that of the screening cylinder.

[0011] Preferably, a circular through groove is provided on the side wall of the screening shell connected to the fixed frame and the arc-shaped screen. The diameter of the circular through groove on the screening shell is the same as the inner diameter of the screening cylinder. A circular cover plate is threaded into the circular through groove on the screening shell. A square through groove is provided on the front side wall of the screening shell. A square cover plate is rotatably connected to the bottom side wall of the square through groove on the screening shell. A handle is fixedly connected to the side walls of the circular cover plate and the square cover plate.

[0012] In this technical solution, the circular through groove facilitates the feeding and discharging of materials into the screening cylinder, while the square through groove facilitates the discharge of materials from the bottom of the screening shell.

[0013] Preferably, the first striking structure includes a fixed block, a first rotating rod, and a striking plate. The fixed block is fixedly connected to the top inner side wall of the fixed frame, the first rotating rod is rotatably connected between the fixed blocks, and the striking plate is fixedly connected to the side wall of the first rotating rod.

[0014] In this technical solution, when the pusher plate rotates past the striking plate, it pushes the striking plate, causing the striking plate to rotate upward. When the pusher plate leaves the striking plate, the striking plate, no longer being pushed, falls under its own weight and strikes the side wall of the screening cylinder, causing the side wall of the screening cylinder to vibrate and clearing the plastic particles blocked in the screen mesh.

[0015] Preferably, the second striking structure includes a second rotating rod, a fixed sleeve, a connecting plate, a striking block, and a second rotating gear. The second rotating rod is rotatably connected to the inner side wall of the screening shell. The fixed sleeve is fixedly connected to the side wall of the second rotating rod. The connecting plate is fixedly connected at equal intervals to the side wall of the fixed sleeve. The striking block is rotatably connected to the side wall of the connecting plate. One end of the second rotating rod passes through the side wall of the screening shell and is fixedly connected to the second rotating gear. The distance between the second rotating rod and the arc-shaped screen is less than the sum of the lengths of the connecting plate and the striking block.

[0016] In this technical solution, the rotation of the second rotating gear drives the rotation of the second rotating rod, which in turn drives the rotation of the fixed sleeve. The fixed sleeve drives the rotation of the connecting plate, which in turn drives the rotation of the striking block. When the striking block passes through the arc-shaped screen, it strikes the screen, causing it to vibrate and thus clearing the plastic particles clogged in the screen's mesh. Preferably, two transmission gears are rotatably connected to the side wall on the back of the screening shell. The two transmission gears are located between rotating gear one and rotating gear two, and the transmission gears mesh with rotating gear one and rotating gear two.

[0017] Preferably, a feeding shell is fixedly connected to the bottom side wall of the screening shell, the top of the feeding shell is fixedly connected to the bottom side wall of the arc-shaped screen, and arc-shaped grooves are provided on the side walls on both sides of the feeding shell.

[0018] In this technical solution, the rotation of the transmission gear drives the rotation of the second rotating gear.

[0019] Preferably, the sealing structure includes a first rotating block, an electric push rod, a second rotating block, a sealing plate, and a first arc-shaped groove. The sealing plate is rotatably connected to the inner wall of the unloading housing. An arc-shaped groove is formed on the bottom side wall of the sealing plate. The first rotating block is rotatably connected to the inner wall of the second arc-shaped groove. The second rotating block is rotatably connected to the inner wall of the first arc-shaped groove. An electric push rod is fixedly connected between the first rotating block and the second rotating block.

[0020] In this technical solution, the electric push rod is shortened, and the electric push rod pulls the sealing plate to rotate downward, so that the material discharge shell is no longer sealed.

[0021] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0022] The positive and progressive effects of this utility model are as follows: 1. The rotation of the motor drives the screening cylinder to rotate, which in turn drives the pusher plate to rotate. The rotation of the screening cylinder causes the plastic particles inside to roll and be screened. Oversized plastic particles cannot pass through the mesh of the screening cylinder and fall out, remaining inside the screening cylinder. Other plastic particles fall onto the arc-shaped screen below. The rotation of the pusher plate pushes the plastic particles on the arc-shaped screen to tumble, causing the arc-shaped screen to screen the plastic particles. This allows oversized plastic particles to pass through the mesh of the arc-shaped screen and be screened out, thus ensuring that the plastic particles remaining on the arc-shaped screen are uniform. This helps to ensure that the plastic particles fed are uniform and avoids the presence of oversized or undersized plastic particles, which would affect the film blowing quality of the blown film machine.

[0023] 2. When the pusher plate rotates past the striking plate, it pushes the striking plate upward. When the pusher plate leaves the striking plate, the striking plate, no longer being pushed, falls under its own weight and strikes the side wall of the screening cylinder, causing the side wall of the screening cylinder to vibrate. This cleans the plastic particles blocking the mesh of the screening cylinder, making it easier to clean the screening cylinder by tapping, and preventing plastic particles from clogging the mesh and affecting the screening efficiency of the screening cylinder.

[0024] 3. The transmission gear rotates, which in turn drives the rotating gear two to rotate. The rotating gear two then drives the rotating rod two to rotate, which in turn drives the striking block to rotate. When the striking block passes through the arc-shaped screen, it strikes the arc-shaped screen, causing it to vibrate. This cleans up the plastic particles that are clogging the mesh of the arc-shaped screen, making it easier to clean the arc-shaped screen cylinder and preventing plastic particles from clogging the mesh and affecting the screening efficiency of the arc-shaped screen. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0026] Figure 2 This is a schematic diagram of the internal structure of the screening shell of this utility model.

[0027] Figure 3 This is a side view of the internal structure of the screening shell of this utility model.

[0028] Explanation of reference numerals in the attached figures 1. Main body of blown film machine; 2. Support plate; 3. Support rod; 4. Screening shell; 5. Motor 1; 6. Round cover plate; 7. Square cover plate; 8. Screening structure; 801. Screening cylinder; 802. Pusher plate; 803. Fixing frame; 804. Arc screen; 805. Rotating gear 1; 806. Motor 2; 807. Support frame; 9. Beating structure 1; 901. Fixing block; 902. Rotating rod 1; 903. Beating plate; 0. Hammering Structure II; 1001. Rotating Rod II; 1002. Fixing Sleeve; 1003. Connecting Plate; 1004. Hammering Block; 1005. Rotating Gear II; 11. Feeding Housing; 12. Sealing Structure; 1201. Rotating Block I; 1202. Electric Push Rod; 1203. Rotating Block II; 1204. Sealing Plate; 1205. Arc-shaped Groove I; 13. Arc-shaped Groove II; 14. Handle Frame; 15. Transmission Gear. Detailed Implementation

[0029] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0030] like Figure 1-3 As shown, a high-efficiency blown film machine specifically for biodegradable plastics includes a blown film machine body 1, and further includes: Screening shell 4, which is disposed above the feed funnel of the blown film machine body 1; Screening structure 8 is disposed inside screening housing 4; A striking structure 9 is disposed within the screening structure 8. The second striking structure 10 is located below the screening structure 8. The first striking structure 9 and the second striking structure 10 knock and clean the screening structure 8. A blocking structure 12 is disposed below the screening structure 8.

[0031] Four support rods 3 are fixedly connected to the side wall of the bottom plate of the blown film machine body 1. Two support plates 2 are fixedly connected to the top of the four support rods 3. The screening shell 4 is rotatably connected between the two support plates 2 through a rotating shaft. A motor 5 is fixedly connected to the side wall of the support plate 2. The rotating end of the motor 5 is fixedly connected to the rotating shaft of the screening shell 4.

[0032] The rotation of motor 5 drives the screening shell 4 to rotate and tilt.

[0033] The screening structure 8 includes a screening cylinder 801, a pusher plate 802, a fixed frame 803, an arc-shaped screen 804, a rotating gear 805, a motor 806, and a support frame 807. The fixed frame 803 and the arc-shaped screen 804 are fixedly connected to the inner wall of the screening housing 4. The bottom of the fixed frame 803 is connected to the top of the arc-shaped screen 804. The screening cylinder 801 is rotatably connected to the fixed frame 803 and the inner wall of the screening cylinder 801. The end of the rotating shaft of the screening cylinder 801 passes through the side wall of the screening housing 4 and is fixedly connected to the rotating gear 805. The support frame 807 is fixedly connected to the back side wall of the screening housing 4. The motor 806 is fixedly connected to the side wall of the support frame 807. The rotating end of the motor 806 is fixedly connected to the rotating gear 805. The pusher plate 802 is fixedly connected at equal intervals to the side wall of the screening cylinder 801.

[0034] The rotation of motor 806 drives the rotation of gear 805, which in turn drives the sieve cylinder 801 and transmission gear 15 to rotate. The sieve cylinder 801 drives the pusher plate 802 to rotate. The rotation of the sieve cylinder 801 causes the plastic particles inside to roll and be sieved. Plastic particles that are too large cannot pass through the mesh of the sieve cylinder 801 and fall out, remaining inside the sieve cylinder. Other plastic particles fall onto the arc-shaped screen 804 below. The rotation of the pusher plate 802 pushes the plastic particles on the arc-shaped screen 804 to move and tumble them, causing the arc-shaped screen 804 to sieve the plastic particles. This allows plastic particles that are too small to pass through the mesh of the arc-shaped screen 804 and be sieved out, falling onto the bottom inner wall of the sieve housing 4, thus making the plastic particles remaining on the arc-shaped screen 804 uniform.

[0035] The pusher plates 802 on the upper and lower sides of the screening cylinder 801 are staggered, and the pusher plates 802 on the left and right sides of the screening cylinder 801 are staggered. The mesh size of the arc-shaped screen 804 is smaller than that of the screening cylinder 801.

[0036] A circular through groove is provided on the side wall of the screening housing 4 connected to the fixed frame 803 and the arc screen 804. The diameter of the circular through groove on the screening housing 4 is the same as the inner diameter of the screening cylinder 801. A circular cover plate 6 is threadedly connected to the circular through groove on the screening housing 4. A square through groove is provided on the front side wall of the screening housing 4. A square cover plate 7 is rotatably connected to the bottom side wall of the square through groove on the screening housing 4. A handle bracket 14 is fixedly connected to the side walls of the circular cover plate 6 and the square cover plate 7.

[0037] The circular through-channel facilitates the feeding and discharging of materials into the screening cylinder 801, while the square through-channel facilitates the discharge of materials from the bottom of the screening shell 4.

[0038] The striking structure 9 includes a fixed block 901, a rotating rod 902, and a striking plate 903. The fixed block 901 is fixedly connected to the top inner side wall of the fixed frame 803. The rotating rod 902 is rotatably connected between the fixed blocks 901. The striking plate 903 is fixedly connected to the side wall of the rotating rod 902.

[0039] When the pusher plate 802 rotates past the striking plate 903, it pushes the striking plate 903, causing the striking plate 903 to rotate upwards. When the pusher plate 802 leaves the striking plate 903, the striking plate 903, no longer being pushed, falls under its own weight and strikes the side wall of the screening cylinder 801, causing the side wall of the screening cylinder 801 to vibrate and clean the plastic particles blocked in the mesh of the screening cylinder 801.

[0040] The second striking structure 10 includes a second rotating rod 1001, a fixed sleeve 1002, a connecting plate 1003, a striking block 1004, and a second rotating gear 1005. The second rotating rod 1001 is rotatably connected to the inner side wall of the screening housing 4. The fixed sleeve 1002 is fixedly connected to the side wall of the second rotating rod 1001. The connecting plate 1003 is fixedly connected at equal intervals to the side wall of the fixed sleeve 1002. The striking block 1004 is rotatably connected to the side wall of the connecting plate 1003. One end of the second rotating rod 1001 passes through the side wall of the screening housing 4 and is fixedly connected to the second rotating gear 1005. The distance between the second rotating rod 1001 and the arc-shaped screen 804 is less than the sum of the lengths of the connecting plate 1003 and the striking block 1004.

[0041] The rotation of gear 1005 drives the rotation of rod 1001, which in turn drives the rotation of fixed sleeve 1002. Fixed sleeve 1002 then drives the rotation of connecting plate 1003, which in turn drives the rotation of striking block 1004. As striking block 1004 passes through arc-shaped screen 804, it strikes the screen, causing it to vibrate and clearing plastic particles clogged within the mesh of the arc-shaped screen 804. Two transmission gears 15 are rotatably connected to the side wall on the back of the screening housing 4. The two transmission gears 15 are located between rotating gear 1 (805) and rotating gear 2 (1005), and the transmission gears 15 mesh with rotating gear 1 (805) and rotating gear 2 (1005).

[0042] The bottom side wall of the screening housing 4 is fixedly connected to the feeding housing 11, the top of the feeding housing 11 is fixedly connected to the bottom side wall of the arc screen 804, and arc grooves 13 are provided on the side walls on both sides of the feeding housing 11.

[0043] The rotation of transmission gear 15 drives the rotation of rotating gear 1005.

[0044] The sealing structure 12 includes a first rotating block 1201, an electric push rod 1202, a second rotating block 1203, a sealing plate 1204, and an arc-shaped groove 1205. The sealing plate 1204 is rotatably connected to the inner wall of the unloading housing 11. An arc-shaped groove 1205 is provided on the bottom side wall of the sealing plate 1204. The first rotating block 1201 is rotatably connected to the inner wall of the second arc-shaped groove 13. The second rotating block 1203 is rotatably connected to the inner wall of the first arc-shaped groove 1205. An electric push rod 1202 is fixedly connected between the first rotating block 1201 and the second rotating block 1203.

[0045] The electric push rod 1202 is shortened, and the electric push rod 1202 pulls the sealing plate 1204 to rotate downward, so that it no longer seals the material discharge housing 11.

[0046] In use, all electrical components mentioned in this application are connected to an external power supply and control switch. By rotating the round cover plate 6 through the handle 14, the round cover plate 6 is removed, and plastic particles are placed into the screening cylinder 801. Then, the round cover plate 6 is re-threaded into the circular through groove. The second motor 806 rotates, driving the first rotating gear 805 to rotate. The first rotating gear 805 drives the screening cylinder 801 and the transmission gear 15 to rotate. The screening cylinder 801 drives the pusher plate 802 to rotate. The rotation of the screening cylinder 801 causes the plastic particles inside to roll and be screened. Plastic particles that are too large cannot pass through the mesh of the screening cylinder 801 and fall down. They are screened out and remain in the screening cylinder. Other plastic particles fall onto the arc-shaped screen 804 below. The rotating pusher plate 802 pushes the plastic particles on the arc-shaped screen 804 to move and tumble them, causing the arc-shaped screen 804 to screen the plastic particles. This allows the plastic particles that are too small to pass through the mesh of the arc-shaped screen 804 and be screened out, falling onto the bottom inner wall of the screening housing 4. This makes the plastic particles remaining on the arc-shaped screen 804 uniform. The electric push rod 1202 is shortened, and the electric push rod 1202 pulls the sealing plate 1204 to rotate downwards, no longer sealing the feeding housing 11. The uniform plastic particles in the arc-shaped screen 804 fall into the feeding funnel on the main body 1 of the blown film machine for feeding, which helps to ensure that the plastic particles fed are uniform and avoids the presence of plastic particles that are too large or too small, which would affect the blown film quality of the blown film machine. When the pusher plate 802 rotates past the striking plate 903, it pushes the striking plate 903, causing the striking plate 903 to rotate upwards. When the pusher plate 802 leaves the striking plate 903, the striking plate 903, no longer being pushed, falls under its own weight and strikes the side wall of the screening cylinder 801, causing the side wall of the screening cylinder 801 to vibrate. This cleans the plastic particles that are blocking the mesh of the screening cylinder 801, making it easier to clean the screening cylinder 801 and preventing plastic particles from clogging the mesh and affecting the screening efficiency of the screening cylinder 801. The rotation of transmission gear 15 drives the rotation of rotating gear 1005, which in turn drives the rotation of rotating rod 1001. Rotating rod 1001 drives the rotation of fixed sleeve 1002, which in turn drives the rotation of connecting plate 1003. Connecting plate 1003 drives the rotation of striking block 1004. When striking block 1004 passes through arc-shaped screen 804, it strikes the arc-shaped screen 804, causing it to vibrate. This cleans up the plastic particles blocking the mesh of the arc-shaped screen 804, making it easier to clean the arc-shaped screen 804 and preventing plastic particles from clogging the mesh and affecting the screening efficiency of the arc-shaped screen 804.

[0047] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A high-efficiency blown film machine specifically for biodegradable plastics, comprising a blown film machine body (1), characterized in that, Also includes: Screening shell (4), the screening shell (4) is disposed above the feed hopper of the blown film machine body (1); Screening structure (8), the screening structure (8) is disposed inside the screening shell (4); A striking structure (9) is provided inside the screening structure (8); The second striking structure (10) is located below the screening structure (8). The first striking structure (9) and the second striking structure (10) knock and clean the screening structure (8). A blocking structure (12) is disposed below the screening structure (8).

2. The high-efficiency blown film machine for biodegradable plastics as described in claim 1, characterized in that: Four support rods (3) are fixedly connected to the side wall of the bottom plate of the blown film machine body (1). Two support plates (2) are fixedly connected to the top of the four support rods (3). The screening shell (4) is rotatably connected between the two support plates (2) through a rotating shaft. A motor (5) is fixedly connected to the side wall of the support plate (2). The rotating end of the motor (5) is fixedly connected to the rotating shaft of the screening shell (4).

3. The high-efficiency blown film machine for biodegradable plastics as described in claim 1, characterized in that: The screening structure (8) includes a screening cylinder (801), a pusher plate (802), a fixed frame (803), an arc-shaped screen (804), a rotating gear (805), a motor (806), and a support frame (807). The fixed frame (803) and the arc-shaped screen (804) are fixedly connected to the inner wall of the screening housing (4). The bottom of the fixed frame (803) is connected to the top of the arc-shaped screen (804). The screening cylinder (801) is rotatably connected to the fixed frame (803) and the screening cylinder (807). On the inner side wall of the cylinder (801), the end of the rotating shaft of the screening cylinder (801) passes through the side wall of the screening housing (4) and is fixedly connected to the rotating gear one (805). The support frame (807) is fixedly connected to the back side wall of the screening housing (4). The support frame (807) is fixedly connected to the side wall of the support frame (807). The rotating end of the motor two (806) is fixedly connected to the rotating gear one (805). Pusher plates (802) are fixedly connected at equal intervals on the side wall of the screening cylinder (801).

4. The high-efficiency blown film machine for biodegradable plastics as described in claim 3, characterized in that: The pusher plates (802) on the upper and lower sides of the screening cylinder (801) are staggered, and the pusher plates (802) on the left and right sides of the screening cylinder (801) are staggered. The mesh size of the arc-shaped screen (804) is smaller than that of the screening cylinder (801).

5. The high-efficiency blown film machine for biodegradable plastics as described in claim 1, characterized in that: The screening housing (4) is connected to the fixed frame (803) and the arc screen (804) by a circular through groove on the side wall. The diameter of the circular through groove on the screening housing (4) is the same as the inner diameter of the screening cylinder (801). A circular cover plate (6) is threaded into the circular through groove on the screening housing (4). A square through groove is provided on the front side wall of the screening housing (4). A square cover plate (7) is rotatably connected to the bottom side wall of the square through groove on the screening housing (4). A handle (14) is fixedly connected to the side walls of the circular cover plate (6) and the square cover plate (7).

6. The high-efficiency blown film machine for biodegradable plastics as described in claim 1, characterized in that: The striking structure 1 (9) includes a fixed block (901), a rotating rod 1 (902) and a striking plate (903). The fixed block (901) is fixedly connected to the top inner side wall of the fixed frame (803). The rotating rod 1 (902) is rotatably connected between the fixed blocks (901). The striking plate (903) is fixedly connected to the side wall of the rotating rod 1 (902).

7. The high-efficiency blown film machine for biodegradable plastics as described in claim 1, characterized in that: The second striking structure (10) includes a second rotating rod (1001), a fixed sleeve (1002), a connecting plate (1003), a striking block (1004), and a second rotating gear (1005). The second rotating rod (1001) is rotatably connected to the inner side wall of the screening shell (4). The fixed sleeve (1002) is fixedly connected to the side wall of the second rotating rod (1001). The connecting plate (1003) is fixedly connected at equal intervals to the side wall of the fixed sleeve (1002). The striking block (1004) is rotatably connected to the side wall of the connecting plate (1003). One end of the second rotating rod (1001) passes through the side wall of the screening shell (4) and is fixedly connected to the second rotating gear (1005). The distance between the second rotating rod (1001) and the arc screen (804) is less than the sum of the lengths of the connecting plate (1003) and the striking block (1004).

8. The high-efficiency blown film machine for biodegradable plastics as described in claim 1, characterized in that: Two transmission gears (15) are rotatably connected to the side wall on the back of the screening shell (4). The two transmission gears (15) are located between rotating gear one (805) and rotating gear two (1005), and the transmission gears (15) mesh with rotating gear one (805) and rotating gear two (1005).

9. The high-efficiency blown film machine for biodegradable plastics as described in claim 1, characterized in that: The bottom sidewall of the screening shell (4) is fixedly connected to the feeding shell (11), the top of the feeding shell (11) is fixedly connected to the bottom sidewall of the arc screen (804), and arc grooves (13) are provided on the sidewalls of both sides of the feeding shell (11).

10. The high-efficiency blown film machine for biodegradable plastics as described in claim 1, characterized in that: The sealing structure (12) includes a rotating block one (1201), an electric push rod (1202), a rotating block two (1203), a sealing plate (1204), and an arc-shaped groove one (1205). The sealing plate (1204) is rotatably connected to the inner side wall of the unloading housing (11). An arc-shaped groove one (1205) is provided on the bottom side wall of the sealing plate (1204). The rotating block one (1201) is rotatably connected to the inner side wall of the arc-shaped groove two (13). The rotating block two (1203) is rotatably connected to the inner side wall of the arc-shaped groove one (1205). An electric push rod (1202) is fixedly connected between the rotating block one (1201) and the rotating block two (1203).

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