A palletizing machine twist bag conveyor

Abstract

The present application relates to a kind of palletizing machine twist package conveyors, including stand, conveying belt and twist package mechanism, the stand bottom is equipped with twist package mechanism, the conveying belt is below twist package mechanism, the twist package mechanism includes the pneumatic rotary table installed in the stand bottom side, the horizontal beam frame is installed in the bottom rotating end of pneumatic rotary table, the mounting plate is installed in the bottom side of both ends of horizontal beam frame, the fixed arm is installed in both sides of mounting plate, the rotating shaft is fixedly installed in the bottom end of both ends of fixed arm, the rotating arm is installed in both ends of rotating shaft, and a plurality of press rolls are installed at equal intervals between two rotating arms;The present application realizes the integrated operation of material bag posture adjustment, twist, dump, rolling flattening, vibration homogenization, has the advantages of high efficiency, good flattening effect, strong adaptability, and is suitable for the palletizing pre-treatment of powder, granular material packaging bag.

Description

Technical Field

[0001] This invention relates to the field of packaging machinery technology, and in particular to a palletizer twist conveyor. Background Technology

[0002] In industries such as chemicals, building materials, food, and feed, powdery and granular materials are usually packaged in woven bags, paper bags, etc. After filling, these bagged materials are often in an upright state, and the material is unevenly distributed inside the bag, with severe accumulation at one end. If they are stacked directly, the stack will be unstable and prone to collapse, affecting storage and transportation safety.

[0003] Existing technologies for processing bagged materials before palletizing have the following main drawbacks: The bags are difficult to adjust in posture. They need to be turned from an upright position to a flat position before they can be stacked. Traditional methods often involve manual flipping or simple baffle tilting, which is inefficient and can easily cause damage to the bags. Uneven material distribution often results in one end of the filled material bags being heavily piled up while the other end is empty. If leveling is not carried out, problems such as tilting and collapse may occur after stacking. Poor leveling effect: Existing leveling equipment mostly uses a single pressure roller for simple rolling, which cannot evenly spread the material piled up at the end of the bag, resulting in an unsatisfactory leveling effect. Insufficient adaptability; different specifications of material bags require different leveling parameters, and the existing equipment is cumbersome to adjust, making it difficult to meet the needs of multi-variety, small-batch production. The process is inefficient because the posture adjustment and leveling processes are separated, requiring multiple machines to work together, resulting in a long and inefficient production line. Summary of the Invention

[0004] The present invention addresses the problem of providing a palletizing machine twisting conveyor, which solves the technical problems of difficulty in adjusting the posture of bagged materials, uneven material distribution, and poor leveling effect in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A palletizing machine twisting conveyor includes a frame, a conveyor belt, and a twisting mechanism. The twisting mechanism is installed at the bottom of the frame, and the conveyor belt is located below the twisting mechanism. The twisting mechanism includes a pneumatic turntable installed on the bottom side of the frame. A crossbeam is installed at the bottom rotating end of the pneumatic turntable. Mounting plates are installed on the bottom sides of both ends of the crossbeam. Fixed arms are installed on both sides of the mounting plates. A rotating shaft is fixedly installed through the bottom ends of the fixed arms at both ends. Rotating arms are installed at both ends of the rotating shaft. Several clamping rollers are installed at equal intervals between two rotating arms. An adjusting arm is rotatably installed at the bottom end of one of the rotating arms. A leveling swing arm is rotatably installed on the inner side of the adjusting arm near the end of the rotating arm. Pressure rollers are installed at equal intervals between two leveling swing arms. A connecting plate is installed on the side wall of the two leveling swing arms away from the end of the rotating arm. A roller seat is installed on the bottom side of the connecting plate through a composite spring. Several vibrating rollers are installed on the bottom side of the roller seat. A pneumatic vibrator is installed in the middle of the top side of the roller seat.

[0006] Preferably, a support beam is installed between the two rotating arms at the same end of the crossbeam frame, and a first pneumatic cylinder is installed between the mounting plate at the same end of the crossbeam frame and the support beam.

[0007] Preferably, a first ear seat is installed on the bottom side of the mounting plate, and a second ear seat is installed on the support beam. The cylinder end of the first pneumatic cylinder is rotatably installed with the first ear seat via a pin, and the telescopic end of the first pneumatic cylinder is rotatably installed with the second ear seat via a pin. The first pneumatic cylinder is used to drive the rotating arm to swing around the rotating shaft to achieve clamping and releasing of the material bag.

[0008] Preferably, a second pneumatic cylinder is installed between the rotating arm and the adjusting arm on the same side of the mounting plate. The cylinder body end of the second pneumatic cylinder is rotatably connected to the top of the rotating arm via a plug shaft, and the telescopic end of the second pneumatic cylinder is rotatably connected to the adjusting arm via a plug shaft. The second pneumatic cylinder is used to drive the adjusting arm to swing relative to the rotating arm, so that the pressure roller is parallel to the conveyor belt during the leveling operation.

[0009] Preferably, a vertical rod is installed at the outer end of the adjusting arm, and a third pneumatic cylinder is installed between the top of the vertical rod and the outer end of the leveling swing arm. The cylinder body end of the third pneumatic cylinder is rotatably connected to the top of the vertical rod via a pin, and the telescopic end of the third pneumatic cylinder is rotatably connected to the outer end of the leveling swing arm via a pin. The third pneumatic cylinder is used to drive the leveling swing arm to swing downward relative to the adjusting arm, thereby adjusting the gap between the pressure roller and the conveyor belt.

[0010] Preferably, at least three clamping rollers are provided, and the surface of the clamping rollers is covered with a polyurethane elastic layer, the hardness of which is 60-70 Shore A.

[0011] Preferably, after the clamping roller at the bottom of the rotating arm releases the material bag, it maintains a preset gap with the conveyor belt, which is greater than the thickness of the material bag when it is lying flat.

[0012] Preferably, at least four pressure rollers are provided along the conveying direction, and the gap between the pressure rollers and the conveyor belt gradually decreases from the feeding end to the discharging end. The gap of the first pressure roller is 1.2-1.5 times the thickness of the material bag, and the gap of the last pressure roller is 1.0-1.1 times the target leveling thickness.

[0013] Preferably, the composite spring installed between the connecting plate and the roller seat is a combination structure of a helical spring and a rubber pad, and the working frequency of the pneumatic vibrator is 50-150Hz.

[0014] Preferably, the specific operating steps of the twist conveyor are as follows: Step 1: In the initial state, the first pneumatic cylinder is in the retracted state, the rotating arm is open outward, and the clamping roller is in the open position; when the material bag in the vertical state is conveyed by the conveyor belt to the bottom of the twisting mechanism, the first pneumatic cylinder extends, drives the rotating arm to swing inward around the rotating axis, the clamping roller clamps the lower section of the material bag from both sides, the pneumatic turntable starts, drives the crossbeam to rotate 90 degrees, and drives the material bag to rotate 90 degrees in the vertical state; Step 2: Before the rotation is completed, the second pneumatic cylinder is in the retracted state. After the rotation is completed, the first pneumatic cylinder retracts, the rotating arm swings outward, the clamping roller releases its grip on the material bag, the conveyor belt starts, and the material bag moves forward. During the movement, the material bag is blocked by the clamping roller located at the bottom of the rotating arm and tilts over, changing from an upright state to a flat state. Step 3: After the material bag is tilted, the second pneumatic cylinder extends, driving the adjusting arm to swing relative to the rotating arm, so that the pressure roller rotates to be parallel to the conveyor belt; at the same time, the third pneumatic cylinder extends, driving the leveling swing arm to swing downward, so that a preset gap is formed between the pressure roller and the conveyor belt, and the gap between multiple pressure rollers gradually decreases along the conveying direction. Step 4: The conveyor belt continues to move the material bag forward. The material bag passes under multiple pressure rollers in sequence. The pressure rollers gradually roll the material bag, spreading the material concentrated at one end of the material bag evenly inside the bag. The material bag then enters the vibration leveling station. The pneumatic vibrator is started, driving the vibrating roller to vibrate at high frequency, applying a high-frequency excitation force in the vertical direction to the material bag, further fluidizing and evenly distributing the material inside the bag, thus completing the leveling operation of the material bag.

[0015] The beneficial effects of this invention are: Integrated twisting and leveling, efficient process integration: The posture adjustment and twisting are integrated. The pneumatic turntable drives the crossbeam to rotate 90 degrees, completing the twisting of the material bag while it is clamped, adjusting the bag opening to the appropriate orientation, which facilitates subsequent palletizing; Automated tipping and leveling: After the clamping roller is released, the material bag is naturally prevented from tipping over by the clamping roller at the bottom of the rotating arm during the conveying process. No additional mechanism is required, the structure is simple, and the operation is reliable; Combined rolling and vibration leveling: The progressive pressure roller rolling and high-frequency vibration are combined. First, the accumulated material is flattened by rolling, and then the material is fluidized and evenly distributed by vibration, which significantly improves the leveling effect; Progressive rolling design ensures uniform material distribution: Multi-stage pressure rollers with stepped gaps gradually decrease from the inlet to the outlet, allowing the material to be gradually flattened during transport, preventing damage from excessive pressure at once; Flexible rolling protection: The pressure rollers are coated with a polyurethane elastic layer, which deforms elastically upon contact with the bag, ensuring effective material flattening without crushing the packaging; Multi-point uniform pressure: Multiple pressure rollers are installed along the conveying direction, subjecting the material to multiple rolling passes during movement, ensuring uniform material distribution and a flat bag surface. High-frequency vibration homogenization eliminates local accumulation: fluidized vibration leveling, pneumatic vibrator drives vibrating roller to generate 50-150Hz high-frequency vibration, causing the material in the bag to fluidize, reducing the friction between particles, and automatically spreading evenly under the action of gravity; elastic vibration transmission: composite springs provide elastic support for the vibrating roller, ensuring that the vibration energy is effectively transmitted to the material bag, while avoiding rigid impact damage to the equipment; vertical excitation and orientation, the vibrating roller applies a high-frequency excitation force in the vertical direction to the material bag, causing the material to bounce up and down in the bag and then settle evenly, eliminating local accumulation; Flexible clamping protection with strong adaptability: Polyurethane elastic clamping rollers, the surface of the clamping rollers is coated with a polyurethane elastic layer with a hardness of 60-70 Shore A, which generates elastic deformation when clamping the material bag, increasing the contact area and avoiding damage to the packaging bag; Adjustable clamping force, the stroke and pressure of the first air cylinder are adjustable, and the clamping force can be adjusted according to different specifications of material bags to adapt to various packaging specifications; Multi-roller synchronous clamping, multiple clamping rollers are arranged at equal intervals, and the force is evenly distributed during clamping to prevent the material bag from tilting or slipping. Multi-degree-of-freedom adjustment to adapt to different specifications: The leveling gap is adjustable, and the third pneumatic cylinder can precisely adjust the swing angle of the leveling arm to control the gap between the pressure roller and the conveyor belt, adapting to material bags of different thicknesses; The pressure roller angle is adjustable, and the second pneumatic cylinder drives the adjusting arm to swing, which can keep the pressure roller parallel to the conveyor belt during the leveling operation, ensuring consistent leveling effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the first structure of the twisting mechanism of the present invention; Figure 3 This is a schematic diagram of the second structure of the twisting mechanism of the present invention; Figure 4 This is a schematic diagram of the third structure of the twisting mechanism of the present invention; Figure 5 This is a cross-sectional view of the twisting mechanism of the present invention.

[0017] Legend: 1. Frame; 2. Conveyor belt; 3. Twisting mechanism; 4. Pneumatic turntable; 5. Crossbeam frame; 6. Mounting plate; 7. Fixed arm; 8. Rotating arm; 9. Rotating shaft; 10. Clamping roller; 11. Adjusting arm; 12. Leveling swing arm; 13. Pressure roller; 14. Connecting plate; 15. Composite spring; 16. Roller seat; 17. Vibrating roller; 18. Pneumatic vibrator; 19. First ear seat; 20. First pneumatic cylinder; 21. Second ear seat; 22. Second pneumatic cylinder; 23. Upright pole; 24. Third pneumatic cylinder. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Specific implementation examples are given below.

[0020] See Figures 1-5A palletizing machine twisting conveyor includes a frame 1, a conveyor belt 2, and a twisting mechanism 3. The twisting mechanism 3 is installed at the bottom of the frame 1, and the conveyor belt 2 is located below the twisting mechanism 3. The twisting mechanism 3 includes a pneumatic turntable 4 installed on the bottom side of the frame 1. A crossbeam frame 5 is installed at the bottom rotating end of the pneumatic turntable 4. The twisting mechanism 3 is installed at the bottom of the frame 1, and the conveyor belt 2 is located below it, forming an upper and lower composite structure. It occupies a small area and has a high space utilization rate. Mounting plates 6 are installed on the bottom sides of both ends of the crossbeam frame 5. Fixed arms 7 are installed on both sides of the mounting plates 6. A rotating shaft 9 is fixedly installed through the bottom end of the fixed arms 7 at both ends. Rotating arms 8 are installed at both ends of the rotating shaft 9. Several rotating arms are installed at equal intervals between the two rotating arms 8. A clamping roller 10 is provided, with a support beam installed between two rotating arms 8 at the same end of the crossbeam frame 5. A first pneumatic cylinder 20 is installed between the mounting plate 6 at the same end of the crossbeam frame 5 and the support beam. A first ear seat 19 is installed on the bottom side of the mounting plate 6, and a second ear seat 21 is installed on the support beam. The cylinder end of the first pneumatic cylinder 20 is rotatably mounted to the first ear seat 19 via a pin, and the telescopic end of the first pneumatic cylinder 20 is rotatably mounted to the second ear seat 21 via a pin. The first pneumatic cylinder 20 is used to drive the rotating arm 8 to swing around the rotating shaft 9 to clamp and release the material bag. At least three clamping rollers 10 are provided, and the surface of the clamping roller 10 is covered with a polyurethane elastic layer with a hardness of 60-70. Shore A, after the clamping roller 10 at the bottom of the rotating arm 8 releases the material bag, it maintains a preset gap with the conveyor belt 2. This gap is greater than the thickness of the material bag when it is lying flat. The first pneumatic cylinder 20 drives the rotating arm 8 to swing synchronously inward or outward around the rotating shaft 9 through the hinge structure of the first ear seat 19 and the second ear seat 21, so as to realize the synchronous opening and closing of the clamping rollers 10 on both sides and the clamping force is uniform. The surface of the clamping roller 10 is covered with a polyurethane elastic layer with a hardness of 60-70 Shore A. When clamping, it generates elastic deformation, increases the contact area, and avoids damaging the packaging bag. After the clamping roller 10 at the bottom of the rotating arm 8 releases the material bag, it maintains a preset gap with the conveyor belt 2. This gap is greater than the thickness of the material bag when it is lying flat. It can act as a tilting barrier without affecting the normal conveying of the material after it is flattened.

[0021] An adjusting arm 11 is rotatably mounted on the bottom end of one of the rotating arms 8. A second pneumatic cylinder 22 is installed between the rotating arm 8 and the adjusting arm 11 on the same side as the mounting plate 6. The cylinder body end of the second pneumatic cylinder 22 is rotatably connected to the top of the rotating arm 8 via a pin, and the telescopic end of the second pneumatic cylinder 22 is rotatably connected to the adjusting arm 11 via a pin. The second pneumatic cylinder 22 is used to drive the adjusting arm 11 to swing relative to the rotating arm 8, so that the pressure roller 13 is parallel to the conveyor belt 2 during the leveling operation. A leveling swing arm 12 is rotatably mounted on the inner side of the adjusting arm 11 near the end of the rotating arm 8. A vertical rod 23 is installed on the outer end of the adjusting arm 11. A third pneumatic cylinder 24 is installed between the top of the vertical rod 23 and the outer end of the leveling swing arm 12. The cylinder body end of the third pneumatic cylinder 24 is connected to the top of the rotating arm 8 via a pin. The top of the upright 23 is rotatably connected via a pin. The telescopic end of the third pneumatic cylinder 24 is rotatably connected to the outer end of the leveling swing arm 12 via a pin. The third pneumatic cylinder 24 is used to drive the leveling swing arm 12 to swing downward relative to the adjusting arm 11, adjusting the gap between the pressure roller 13 and the conveyor belt 2. Pressure rollers 13 are installed at equal intervals between the two leveling swing arms 12. At least four pressure rollers 13 are arranged along the conveying direction, and the gap between the pressure roller 13 and the conveyor belt 2 gradually decreases from the feeding end to the discharging end. The gap of the first pressure roller 13 is 1.2-1.5 times the thickness of the material bag, and the gap of the last pressure roller 13 is 1.0-1.1 times the target leveling thickness. The two leveling swing arms 12 are mounted on the side wall away from the rotating arm 8. The system is equipped with a connecting plate 14. A roller seat 16 is mounted on the bottom side of the connecting plate 14 via a composite spring 15. Several vibrating rollers 17 are mounted on the bottom side of the roller seat 16. A pneumatic vibrator 18 is mounted on the top center of the roller seat 16. The composite spring 15 between the connecting plate 14 and the roller seat 16 is a combination of a helical spring and a rubber pad. The working frequency of the pneumatic vibrator 18 is 50-150Hz. A second pneumatic cylinder 22 drives the adjusting arm 11 to swing relative to the rotating arm 8, achieving coarse positioning of the pressure roller 13. A third pneumatic cylinder 24 drives the leveling swing arm 12 to swing downward relative to the adjusting arm 11, achieving fine adjustment of the gap between the pressure roller 13 and the conveyor belt 2. The two-stage adjustment works in tandem, with a wide range of applications. The gap gradually decreases from the feed end to the discharge end, forming a progressive rolling process. This avoids the material inside the bag being squeezed and damaged by a single large pressure. The pneumatic vibrator 18 generates a high-frequency vibration of 50-150Hz, which is transmitted to the material bag through the roller seat 16 and the vibrating roller 17. This causes the material inside the bag to fluidize, reducing the friction between particles. Under the action of gravity, the material automatically and evenly spreads out. The composite spring 15 adopts a combination structure of helical spring and rubber pad to provide elastic support for the vibrating roller 17. This ensures that the vibration energy is effectively transmitted to the material bag while avoiding rigid impact damage to the equipment. The vibrating roller 17 applies a high-frequency excitation force in the vertical direction to the material bag, causing the material to bounce up and down inside the bag and then settle evenly, effectively eliminating local accumulation and gaps.

[0022] Working principle: In the initial state, the first pneumatic cylinder 20 is in the retracted state, the rotating arm 8 is opened outward, and the clamping roller 10 is in the open position; when the material bag in the vertical state is conveyed by the conveyor belt 2 to the bottom of the twisting mechanism 3, the first pneumatic cylinder 20 extends, drives the rotating arm 8 to swing inward around the rotating shaft 9, the clamping roller 10 clamps the lower section of the material bag from both sides, the pneumatic turntable 4 starts, drives the crossbeam frame 5 to rotate 90 degrees, and drives the material bag to rotate 90 degrees in the vertical state; Before the rotation is completed, the second pneumatic cylinder 22 is in a retracted state. After the rotation is completed, the first pneumatic cylinder 20 retracts, the rotating arm 8 swings outward, the clamping roller 10 releases its grip on the material bag, the conveyor belt 2 starts, and drives the material bag forward. During the movement, the material bag is blocked by the clamping roller 10 located at the bottom of the rotating arm 8 and tilts over, changing from an upright state to a flat state. After the material bag is tilted, the second pneumatic cylinder 22 extends and drives the adjusting arm 11 to swing relative to the rotating arm 8, so that the pressure roller 13 rotates to be parallel to the conveyor belt 2; at the same time, the third pneumatic cylinder 24 extends and drives the leveling swing arm 12 to swing downward, so that a preset gap is formed between the pressure roller 13 and the conveyor belt 2, and the gap between the multiple pressure rollers 13 gradually decreases along the conveying direction. The conveyor belt 2 continues to move the material bag forward. The material bag passes under multiple pressure rollers 13 in sequence. The pressure rollers 13 gradually roll the material bag, spreading the material concentrated at one end of the material bag evenly into the bag. The material bag then enters the vibration leveling station. The pneumatic vibrator 18 is started, driving the vibrating roller 17 to vibrate at high frequency, applying a high-frequency excitation force in the vertical direction to the material bag, so that the material inside the bag is further fluidized and evenly distributed, completing the leveling operation of the material bag.

[0023] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A palletizer twisting conveyor, characterized in that, The device includes a frame (1), a conveyor belt (2), and a twisting mechanism (3). The twisting mechanism (3) is installed at the bottom of the frame (1). The conveyor belt (2) is located below the twisting mechanism (3). The twisting mechanism (3) includes a pneumatic turntable (4) installed on the bottom side of the frame (1). A crossbeam frame (5) is installed at the bottom rotating end of the pneumatic turntable (4). Mounting plates (6) are installed on the bottom sides of both ends of the crossbeam frame (5). Fixed arms (7) are installed on both sides of the mounting plates (6). A rotating shaft (9) is fixedly installed through the bottom end of the fixed arms (7) at both ends. Rotating arms (8) are installed at both ends of the rotating shaft (9). The two rotating arms (8) are spaced apart. Several clamping rollers (10) are installed at intervals. An adjusting arm (11) is rotatably installed at the bottom end of one of the rotating arms (8). A leveling swing arm (12) is rotatably installed on the inner side of the adjusting arm (11) near the end of the rotating arm (8). Pressure rollers (13) are installed at equal intervals between the two leveling swing arms (12). A connecting plate (14) is installed on the side wall of the two leveling swing arms (12) away from the end of the rotating arm (8). A roller seat (16) is installed on the bottom side of the connecting plate (14) through a composite spring (15). Several vibrating rollers (17) are installed on the bottom side of the roller seat (16). A pneumatic vibrator (18) is installed in the middle of the top side of the roller seat (16).

2. The palletizing machine twisting conveyor according to claim 1, characterized in that, A support beam is installed between two rotating arms (8) at the same end of the crossbeam frame (5), and a first pneumatic cylinder (20) is installed between the mounting plate (6) at the same end of the crossbeam frame (5) and the support beam.

3. A palletizing machine twist conveyor according to claim 2, characterized in that, The mounting plate (6) has a first ear seat (19) installed on its bottom side, and the support beam has a second ear seat (21) installed on its top side. The cylinder end of the first pneumatic cylinder (20) is rotatably mounted to the first ear seat (19) via a pin. The telescopic end of the first pneumatic cylinder (20) is rotatably mounted to the second ear seat (21) via a pin. The first pneumatic cylinder (20) is used to drive the rotating arm (8) to swing around the rotating shaft (9) to achieve the clamping and release of the material bag.

4. A palletizing machine twisting conveyor according to claim 3, characterized in that, A second pneumatic cylinder (22) is installed between the rotating arm (8) and the adjusting arm (11) on the same side of the mounting plate (6). The cylinder end of the second pneumatic cylinder (22) is rotatably connected to the top of the rotating arm (8) through a plug shaft. The telescopic end of the second pneumatic cylinder (22) is rotatably connected to the adjusting arm (11) through a plug shaft. The second pneumatic cylinder (22) is used to drive the adjusting arm (11) to swing relative to the rotating arm (8), so that the pressure roller (13) is parallel to the conveyor belt (2) during the leveling operation.

5. A palletizing machine twist conveyor according to claim 4, characterized in that, A vertical rod (23) is installed on the outer end of the adjusting arm (11). A third pneumatic cylinder (24) is installed between the top of the vertical rod (23) and the outer end of the leveling swing arm (12). The cylinder body end of the third pneumatic cylinder (24) is rotatably connected to the top of the vertical rod (23) through a plug shaft. The telescopic end of the third pneumatic cylinder (24) is rotatably connected to the outer end of the leveling swing arm (12) through a plug shaft. The third pneumatic cylinder (24) is used to drive the leveling swing arm (12) to swing downward relative to the adjusting arm (11) to adjust the gap between the pressure roller (13) and the conveyor belt (2).

6. A palletizing machine twisting conveyor according to claim 5, characterized in that, At least three clamping rollers (10) are provided, and the surface of the clamping rollers (10) is covered with a polyurethane elastic layer, the hardness of which is 60-70 Shore A.

7. A palletizing machine twist conveyor according to claim 6, characterized in that, After the clamping roller (10) at the bottom of the rotating arm (8) releases the material bag, it maintains a preset gap with the conveyor belt (2), which is greater than the thickness of the material bag when it is lying flat.

8. A palletizing machine twist conveyor according to claim 7, characterized in that, At least four pressure rollers (13) are provided along the conveying direction, and the gap between the pressure rollers (13) and the conveyor belt (2) gradually decreases from the feed end to the discharge end. The gap of the first pressure roller (13) is 1.2-1.5 times the thickness of the material bag, and the gap of the last pressure roller (13) is 1.0-1.1 times the target leveling thickness.

9. A palletizing machine twist conveyor according to claim 8, characterized in that, The composite spring (15) installed between the connecting plate (14) and the roller seat (16) is a combination structure of a helical spring and a rubber pad, and the working frequency of the pneumatic vibrator (18) is 50-150Hz.

10. A palletizing machine twist conveyor according to claim 9, characterized in that, The specific operating steps of this twist conveyor are as follows: Step 1: In the initial state, the first pneumatic cylinder (20) is in the retracted state, the rotating arm (8) is open outward, and the clamping roller (10) is in the open position; when the material bag in the vertical state is conveyed by the conveyor belt (2) to the bottom of the twisting mechanism (3), the first pneumatic cylinder (20) extends, drives the rotating arm (8) to swing inward around the rotating shaft (9), the clamping roller (10) clamps the lower section of the material bag from both sides, the pneumatic turntable (4) starts, drives the crossbeam frame (5) to rotate 90 degrees, and drives the material bag to rotate 90 degrees in the vertical state; Step 2: Before the rotation is completed, the second pneumatic cylinder (22) is in a retracted state. After the rotation is completed, the first pneumatic cylinder (20) retracts, the rotating arm (8) swings outward, the clamping roller (10) releases its grip on the material bag, the conveyor belt (2) starts, and drives the material bag forward. During the movement, the material bag is blocked by the clamping roller (10) located at the bottom of the rotating arm (8) and tilts over, changing from an upright state to a flat state. Step 3: After the material bag is tilted, the second pneumatic cylinder (22) extends and drives the adjusting arm (11) to swing relative to the rotating arm (8), so that the pressure roller (13) rotates to be parallel to the conveyor belt (2); at the same time, the third pneumatic cylinder (24) extends and drives the leveling swing arm (12) to swing downward, so that a preset gap is formed between the pressure roller (13) and the conveyor belt (2), and the gap between the multiple pressure rollers (13) along the conveying direction gradually decreases; Step 4: The conveyor belt (2) continues to move the material bag forward. The material bag passes under multiple pressure rollers (13) in sequence. The pressure rollers (13) gradually roll the material bag, spreading the material concentrated at one end of the material bag evenly into the bag. The material bag then enters the vibration leveling station. The pneumatic vibrator (18) is started, driving the vibrating roller (17) to vibrate at high frequency, applying a high-frequency excitation force in the vertical direction to the material bag, so that the material inside the bag is further fluidized and evenly distributed, completing the leveling operation of the material bag.

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