A bale press double-belt roller variable-diameter forming device

Abstract

The application discloses a double-belt roller variable-diameter forming device of a round bale machine, and relates to the technical field of round bale forming equipment, which comprises a front forming chamber, a rear forming chamber, a feeding conveying mechanism and a variable-diameter adjusting mechanism, a belt roller mechanism is arranged in the front forming chamber and the rear forming chamber, the lower ends of the two belt roller mechanisms can be spliced together to form a bundling cavity, and the upper ends are open to form feeding ports, the feeding conveying mechanism is arranged on the feeding ports, the variable-diameter adjusting mechanism is arranged on the belt roller mechanism, and the variable-diameter adjusting mechanism can adjust the diameter of the bundling cavity. By adopting the upper feeding ports and the variable-diameter adjusting mechanism, the size and weight of the formed round bale can be freely controlled when different materials are formed into round bales, the materials can enter the bundling chamber more evenly and smoothly, the fine and broken materials can be more evenly mixed into the round bale when the round bale is rotated and formed, and the structure combining the double-belt roller with the hydraulic pressure can adapt to more types of materials and has better wrapping forming effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of round bale forming equipment, in particular to a double-belt roller diameter-variable forming device of a round baler. BACKGROUND

[0002] Straw is an important by-product of crops and an important production resource for industry and agriculture. In addition to being used as fuel, straw can also be used as fertilizer, feed and industrial raw material. According to statistics, the annual straw yield in China is as high as 900 million tons, and the large yield and wide use of straw are self-evident.

[0003] With the diversified development of agriculture and animal husbandry in China, the yield of both grain crop straw (such as wheat straw, rice straw, corn straw, and sorghum straw) and economic crop straw (such as sunflower stalks and rapeseed stalks) is increasing. Round balers are widely used due to their large processing capacity, large and compact bale size, and low material leakage rate.

[0004] However, the existing round bale diameter-variable forming equipment all uses a downward feeding method, which is suitable for forming cotton, a single material with good adhesion. When forming fluffy materials, the equipment has a narrow adaptation range, the feeding port is easily blocked, and slippage and insufficient wrapping tension may occur during film wrapping. When forming loose and unevenly sized materials, small particles may be missed during downward feeding. In addition, the belt tensioning structure of the downward feeding round bale diameter-variable forming equipment is complex, which is not conducive to precise control of the round bale weight. SUMMARY

[0005] The purpose of the present application is to provide a double-belt roller diameter-variable forming device of a round baler to solve the problems existing in the prior art and change the feeding method from downward feeding to upward feeding, which can form round bales of different sizes and weights for different materials.

[0006] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0007] The present application provides a double-belt roller diameter-variable forming device of a round baler, which comprises a front forming chamber, a rear forming chamber, a feeding conveying mechanism, and a diameter-variable adjusting mechanism. The front forming chamber is fixedly arranged on a frame. The upper end of the rear forming chamber is hingedly connected to the frame, and the lower end is connected to an opening mechanism. A belt roller mechanism is arranged in each of the front forming chamber and the rear forming chamber. The rotation directions of the two belt roller mechanisms are the same. The belt roller mechanisms are connected to a driving mechanism through a chain sprocket and chain transmission mechanism. The lower ends of the two belt roller mechanisms can be connected together to form a baling cavity, and the upper ends are open to form a feeding port. The feeding conveying mechanism is arranged on the feeding port. The diameter-variable adjusting mechanism is arranged on the belt roller mechanism, and can adjust the diameter of the baling cavity.

[0008] Preferably, the front forming chamber and the rear forming chamber each comprise a machine shell and a belt roller mechanism, the belt roller mechanism comprising a forming belt, a fixed roller and a damping roller, the fixed roller being rotatably arranged on the machine shell, the fixed roller being provided with the forming belt, the damping roller being movably arranged on the machine shell and located on the outer surface of the forming belt, the inner side of the forming belt being spliced to form the baling cavity, the running direction of the single side forming belt on both sides of the baling cavity being opposite.

[0009] Preferably, the two ends of the rotating shaft of the damping roller are respectively connected with a linear drive mechanism, the other end of the linear drive mechanism being connected with the machine shell, a strip-shaped hole being provided on the machine shell, the rotating shaft of the damping roller being slidably arranged in the strip-shaped hole.

[0010] Preferably, the linear drive mechanism comprises an electric push rod, a hydraulic cylinder and a pneumatic cylinder.

[0011] Preferably, the two sides of the feeding port and the bottom of the baling cavity are respectively provided with a fixed roller, the roller surface of the fixed roller provided at the feeding port being coated with a quartz sand coating and having a larger diameter than other fixed rollers, the inner side of each forming belt being not provided with the fixed roller and the outer side being provided with a plurality of fixed rollers, the damping roller being arranged between two adjacent fixed rollers.

[0012] Preferably, a feeding scraper is provided on the machine shell, the feeding scrapers being respectively located on the two sides of the feeding port, the feeding scrapers being L-shaped, and a brush strip being provided on the inner end of the feeding scraper and facing the direction of the forming belt.

[0013] Preferably, the diameter adjusting mechanism comprises a pair of compression rollers, the two compression rollers being respectively movably arranged on the two sides of the baling cavity, the compression rollers being located on the inner side of the forming belt and being capable of reciprocating and linearly moving on the inner side of the forming belt, thereby changing the diameter of the baling cavity; the diameter adjusting mechanism further comprises a pair of tension adjusting rollers, the two tension adjusting rollers being respectively arranged in the inner surface of the inner side of the forming belt, the tension adjusting rollers being used for adjusting the tension of the forming belt.

[0014] Preferably, the two ends of the rotating shaft of the compression roller and the tension adjusting roller are respectively connected with a linear drive mechanism, the other end of the linear drive mechanism being respectively connected with the corresponding machine shell, a long strip-shaped hole being provided on the machine shell for the sliding of the rotating shaft, the linear drive mechanism comprising an electric push rod, a hydraulic cylinder and a pneumatic cylinder; the angle between the displacement direction of the compression roller and the horizontal plane is an acute angle, the position of the compression roller on the rear forming chamber being higher than the position of the compression roller on the front forming chamber and the diameter of the compression roller on the rear forming chamber being larger than the diameter of the compression roller on the front forming chamber.

[0015] Preferably, one side of the feeding port is hinged with the feeding conveying mechanism, the feeding conveying mechanism is a belt conveying mechanism, the hinged end of the belt conveying mechanism is close to the feeding port, and the movable end can be lifted, and the feeding conveying mechanism can swing upward by 0-90 degrees.

[0016] Preferably, a material stirring roller is arranged on the shell of the front forming chamber, the material stirring roller is connected with a motor, the material stirring roller is located above the feeding port and the feeding conveying mechanism, two reverse spiral blades are symmetrically arranged on the material stirring roller, the outer end of the feeding conveying mechanism is connected with a lifting mechanism, and the rotating direction of the material stirring roller is opposite to the rotating direction of the belt of the feeding conveying mechanism.

[0017] The present application has the following technical effects relative to the prior art:

[0018] The present application changes the upper feeding port and adds the diameter adjusting mechanism, so that the size and weight of the formed round bale are freely controllable, the material can enter the baling chamber more evenly and smoothly, the fine material can be more evenly mixed into the round bale during the rotation and forming of the round bale, and the structure combining the double-belt roller with the hydraulic pressure can adapt to more types of materials and achieve better wrapping and forming effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0020] Figure 1 Structure diagram of the diameter-adjustable forming device of the double-belt roller of the round bale machine Figure 1 ;

[0021] Figure 2 Structure diagram of the diameter-adjustable forming device of the double-belt roller of the round bale machine Figure 2 ;

[0022] Figure 3 Structure diagram of the diameter-adjustable forming device of the double-belt roller of the round bale machine Figure 3 ;

[0023] Figure 4 Structure diagram of the minimum diameter of the baling cavity in the embodiment of the present application;

[0024] Figure 5 Structure diagram of the maximum diameter of the baling cavity in the embodiment of the present application;

[0025] Figure 6This is a schematic diagram of the material feeding roller in an embodiment of the present invention;

[0026] Wherein: 1-front forming chamber, 2-rear forming chamber, 3-feeding conveyor mechanism, 4-machine shell, 5-fixed roller, 6-forming belt, 7-damping roller, 8-bundling chamber, 9-feed inlet, 10-strip hole, 11-hydraulic cylinder, 12-pneumatic cylinder, 13-feeding scraper, 14-brush strip, 15-pressing roller, 16-tension adjusting roller, 17-push roller, 18-spiral blade, 19-drive motor. Detailed Implementation

[0027] 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.

[0028] The purpose of this invention is to provide a double-belt roller variable diameter forming device for a round bale machine to solve the problems existing in the prior art, so as to change the feeding method from bottom feeding to top feeding, and to form round bales of different sizes and weights for different materials.

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1 to 6 As shown: This embodiment provides a double-belt roller variable diameter forming device for a round baler, including a front forming chamber 1, a rear forming chamber 2, a feeding conveying mechanism 3, and a variable diameter adjustment mechanism. The front forming chamber 1 is fixedly mounted on the frame. The upper end of the rear forming chamber 2 is hinged to the frame, and the lower end is connected to an opening mechanism, which is a hydraulic rod. The opening and closing of the rear forming chamber 2 is achieved by pushing and pulling the hydraulic rod. A belt roller mechanism is provided in both the front forming chamber 1 and the rear forming chamber 2. The two belt roller mechanisms rotate in opposite directions (the belts rotate counterclockwise or clockwise). The belt roller mechanisms are connected to the drive mechanism through a sprocket and chain transmission mechanism. The lower ends of the two belt roller mechanisms can be spliced ​​together to form a baling cavity 8, and the upper ends are open to form a feeding port 9. The feeding port 9 is provided with a feeding conveying mechanism 3. The belt roller mechanism is provided with a variable diameter adjustment mechanism, which can adjust the diameter of the baling cavity 8.

[0031] As an alternative, the front forming chamber 1 and the rear forming chamber 2 in the embodiment each include a shell 4 and a belt roller mechanism, the belt roller mechanism including a forming belt 6, a fixed roller 5 and a damping roller 7, the fixed roller 5 being rotationally arranged on the shell 4, the fixed roller 5 having the forming belt 6 wound thereon, the damping roller 7 being movably arranged on the shell 4 and located on the outer surface of the forming belt 6, the inner side of the forming belt 6 being spliced to form a baling cavity 8, the running directions of the single-sided forming belts 6 on the two sides of the baling cavity 8 being opposite (one above the other), and according to the centripetal force in the formation of the circular motion, the material can be made to do circular motion in the baling cavity 8, and then be wrapped and rolled layer by layer. The inner surface of each forming belt 6 is the inner ring surface of the forming belt, and the outer surface is the outer ring surface of the forming belt; the inner side of the forming belt 6 is the position of the oppositely arranged single-sided belts of the two forming belts spliced to form the baling cavity 8, and the outer side of the forming belt 6 is the position of the single-sided belts at the outer contour of the front forming chamber 1 and the rear forming chamber 2; or, as shown in the drawings, the inner side of the forming belt is located on the left side of the front forming chamber 1 (and the right side of the rear forming chamber 2), and the outer side is located on the right side of the front forming chamber 1 (and the left side of the rear forming chamber 2). Figure 4

[0032] As an alternative, the two ends of the rotating shaft of the damping roller 7 are respectively connected to a linear drive mechanism, the other end of the linear drive mechanism being connected to the shell 4, and a strip-shaped hole 10 is arranged on the shell 4, and the rotating shaft of the damping roller 7 is slidably arranged in the strip-shaped hole 10. The linear drive mechanism in the embodiment includes an electric push rod, a hydraulic cylinder 11 and an air cylinder 12. Among them, the damping roller 7 below the fixed roller 5 at the feeding port 9 is connected to the air cylinder 12, which can increase the wrap angle between the fixed roller 5 and the forming belt 6, reduce the vibration and relative displacement generated in the movement of the forming belt 6, and the damping degree can be adjusted manually; the damping roller 7 between the second fixed roller 5 and the tension adjusting roller 16 is connected to the hydraulic cylinder 11, which can stabilize the tension of the forming belt 6 in the front and rear forming chambers during the diameter change of the round bale.

[0033] The linear drive mechanism in the embodiment preferably uses the hydraulic cylinder 11, which has large power and adopts a double-belt and hydraulic pressure tightening variable-diameter shaping mode, so that the tightness of the round bale mixed with different materials can be guaranteed; during the variable-diameter process, the hydraulic system is used, the diameter of the baling cavity 8 can be calculated according to the set value of the extension of the hydraulic rod in the control system, and then the diameter of the round bale can be controlled to stop at any time within a certain range, and the weight of the formed round bale can also be changed according to the preset pressure of the hydraulic system.

[0034] ​As an optional solution, two fixed rollers 5 are arranged on both sides of the feeding port 9 and the bottom of the baling cavity 8, the roller surface of the fixed roller 5 arranged at the feeding port 9 is coated with quartz sand coating and has a larger diameter than other fixed rollers 5, the fixed roller 5 serves as a component for providing power to the forming belt 6, can increase the friction between the roller and the forming belt 6, avoid the slip of the belt, and each forming belt 6 is not provided with a fixed roller 5 on the inner side of the single side (convenient for realizing the variable diameter of the baling cavity 8) and is provided with a plurality of fixed rollers 5 on the outer side (supporting the basic shape of the forming belt 6), and the damping roller 7 is arranged between two adjacent fixed rollers 5, which can increase the wrap angle between the forming belt 6 and the fixed roller 5 and has a damping function.

[0035] As an optional solution, the feeding scraper 13 is arranged on the shell 4 in the embodiment, the feeding scraper 13 is arranged on both sides of the feeding port 9, the feeding scraper 13 is L-shaped, and the inner end of the feeding scraper 13 is close to the forming belt 6 and is provided with a brush strip 14 in the direction of the forming belt 6. Among them, the feeding scraper 13 is welded on the shell of the front forming chamber 1 and the rear forming chamber 2 at the feeding port 9, and is close to the fixed roller 5 at the feeding port 9, the brush strip 14 is fixed on the feeding scraper 13 by bolts, and is used for cleaning the material attached to the forming belt 6.

[0036] As an optional solution, the variable diameter adjusting mechanism includes a pair of compression rollers 15, two compression rollers 15 are correspondingly arranged on both sides of the baling cavity 8, the compression roller 15 is located on the inner side of the forming belt 6 and can reciprocate linearly on the inner side of the forming belt 6, thereby changing the diameter of the baling cavity 8; the variable diameter adjusting mechanism further includes a pair of tension adjusting rollers 16, two tension adjusting rollers 16 are correspondingly arranged on the inner surface of the outer forming belt 6, and the tension adjusting roller 16 is used to adjust the tension of the forming belt 6 when the diameter of the baling cavity 8 is changed, so as to maintain the effective tension of the forming belt 6 and provide sufficient pressure for the formed bundle.

[0037] As an optional solution, the two ends of the rotating shaft of the compression roller 15 and the tension adjusting roller 16 are respectively connected with a linear driving mechanism, the other end of the linear driving mechanism is respectively connected to the corresponding shell 4, the shell 4 is correspondingly provided with a long strip hole for sliding of the rotating shaft, and the linear driving mechanism includes an electric push rod, a hydraulic cylinder 11 and a pneumatic cylinder 12, and the hydraulic cylinder 11 is preferred in the embodiment, so as to conveniently provide sufficient supporting force.

[0038] As an optional solution, the angle between the displacement direction of the compression roller 15 and the horizontal plane is an acute angle, the position of the compression roller 15 on the rear forming chamber 2 is higher than that of the compression roller 15 on the front forming chamber 1 and has a larger diameter than that of the compression roller 15 on the front forming chamber 1, so as to form an envelope angle of the compression roller 15 at a high position of the baling cavity 8, thereby having a certain compacting effect on the material.

[0039] As an alternative, the feeding conveying mechanism 3 is hinged on one side of the feeding port 9 in the embodiment, the feeding conveying mechanism 3 is a belt conveying mechanism, the hinged end of the belt conveying mechanism is close to the feeding port 9, the movable end can be lifted, the feeding conveying mechanism 3 can swing 0°-90° upward, preferably swing about 15° upward in the horizontal position, the outer end of the feeding conveying mechanism 3 is connected with a lifting mechanism, the rotating direction of the poking roller 17 is opposite to the rotating direction of the belt of the feeding conveying mechanism 3, so that the material is uniformly conveyed between the poking roller 17 and the feeding conveying mechanism 3, the conveying angle of the feeding conveying mechanism 3 can be changed, and the material can be more conveniently and uniformly scattered in the horizontal plane.

[0040] As an alternative, the poking roller 17 is arranged on the shell 4 of the front forming chamber 1 in the embodiment, the poking roller 17 is connected with the driving motor 19, the poking roller 17 is located above the feeding port 9 and the feeding conveying mechanism 3, and two reverse helical blades 18 are symmetrically arranged on the poking roller 17. In the embodiment, when the material is fed from above the round bale forming cavity, the fine material can be more uniformly mixed into the round bale during the rotation and forming of the round bale due to the gravity falling, and the poking roller 17 for scattering the material to the left and right is designed in the feeding port 9, such as Figure 3 After the clockwise rotation, the material can move to the left and right sides respectively, so that the material is not concentrated and is more uniform during the discharging. The driving motor 19 is installed on the shaft head of the poking roller 17 to provide power for the poking roller 17, the rotating speed and direction of the poking roller 17 can be controlled by the controller, if the material is jammed between the poking roller 17 and the feeding conveying mechanism 3, the jammed material can be cleaned by reversing the poking roller 17 or the feeding conveying mechanism 3.

[0041] The specific working process of the double-belt roller diameter-changing forming device of the round baler in the embodiment is as follows:

[0042] The embodiment is further provided with a controller in communication connection with the driving components. The material falls into the molding cavity through the feeding conveying mechanism 3. As the material accumulates more and more, the hydraulic cylinder 11 of the tension adjusting roller 16 starts to contract, so that the single-sided molding belt on both sides is loose, and the extra stroke can better and more wrap the material to form an initial round bale. During this period, the feeding conveying mechanism 3 can be adjusted to swing or fixed conveying mode according to the controller, and the material can be uniformly fed into the molding cavity according to the controller. As the material accumulates, the controller controls the hydraulic cylinder 11 of the compression roller 15 to gradually extend, and the hydraulic cylinder 11 of the tension adjusting roller 16 to gradually shorten, so that the diameter of the formed round bale becomes larger and larger. The controller can control the diameter of the round bale to reach the set value at any time according to different diameter requirements. The material stirring roller 17 and the feeding conveying mechanism 3 stop working, the rear molding chamber 2 is opened through the opening mechanism, and the round bale molding is completed. The limit diameter of the round bale is that the hydraulic cylinder 11 of the compression roller 15 extends to the limit position or contracts to the limit position, wherein the weight of the round bale can be adjusted by the controller.

[0043] The hydraulic control system of the embodiment provides stable system pressure and power for the whole system. The controller provides functions such as commutation, speed regulation, preset automatic control, etc. for the whole hydraulic system, can control the speed of the material stirring roller 17, realize the change of the feeding conveying material speed and the feeding angle, the rotation of the fixed roller 5 provides power for the round bale molding, and the hydraulic cylinders 11 cooperate with each other under the control of the controller to realize the shaping of round bales of different materials with any size. The embodiment adopts double-belt and hydraulic compression variable-diameter shaping mode, which can ensure the tightness of the round bale mixed with different materials, can change the weight of the round bale according to the preset pressure, and when the material is fed from above the round bale molding cavity, the material stirring roller 17 that can scatter the material left and right and the feeding conveying mechanism 3 that can change the conveying angle are designed at the feeding port 9, so that the fine material can be more uniformly mixed into the round bale during the rotation of the round bale, and the formed round bale is more compact.

[0044] In the specification, specific examples are applied to illustrate the principles and implementation modes of the present application. The above examples are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A double-belt roller variable diameter forming device for a round bundling machine, characterized in that: The device includes a front forming chamber, a rear forming chamber, a feeding conveying mechanism, and a diameter adjustment mechanism. The front forming chamber is fixedly mounted on the frame. The upper end of the rear forming chamber is hinged to the frame, and the lower end is connected to an opening mechanism. Both the front and rear forming chambers are equipped with a belt roller mechanism. The two belt roller mechanisms rotate in the same direction. The belt roller mechanisms are connected to a drive mechanism through a sprocket and chain transmission mechanism. The lower ends of the two belt roller mechanisms can be joined together to form a bundling chamber, and the upper ends are open to form a feeding port. The feeding conveying mechanism is provided on the feeding port. The diameter adjustment mechanism is provided on the belt roller mechanism, and the diameter adjustment mechanism can adjust the diameter of the bundling chamber. Both the front forming chamber and the rear forming chamber include a housing and a belt roller mechanism. The belt roller mechanism includes a forming belt, a fixed roller, and a damping roller. The fixed roller is rotatably mounted on the housing, and the forming belt is wound around the outside of the fixed roller. The damping roller is movably mounted on the housing and located on the outer surface of the forming belt. The inner sides of the forming belts are spliced ​​to form the bundling cavity. The single-sided forming belts on both sides of the bundling cavity run in opposite directions. Each forming belt has no fixed roller on its inner side and several fixed rollers on its outer side. The damping roller is located between two adjacent fixed rollers. The diameter adjustment mechanism includes a pair of pressing rollers, which are respectively movably disposed on both sides of the bundling cavity. The pressing rollers are located inside the forming belt and can reciprocate linearly inside the forming belt, thereby changing the diameter of the bundling cavity. The diameter adjustment mechanism also includes a pair of tension adjustment rollers, which are respectively disposed on the inner surface of the outer forming belt. The tension adjustment rollers are used to adjust the tension of the forming belt. The two ends of the rotating shafts of the pressing roller and the tension adjusting roller are respectively connected to a linear drive mechanism, and the other end of the linear drive mechanism is respectively connected to the corresponding machine housing. The machine housing is provided with an elongated hole for sliding the rotating shaft of the tension adjusting roller. The linear drive mechanism includes an electric push rod, a hydraulic cylinder and a pneumatic cylinder. The displacement direction of the pressing roller makes an acute angle with the horizontal plane. The position of the pressing roller on the rear forming chamber is higher than the position of the pressing roller on the front forming chamber and its diameter is also larger than the diameter of the pressing roller on the front forming chamber.

2. The double-belt roller variable diameter forming device for a round bundling machine according to claim 1, characterized in that: The two ends of the damping roller shaft are respectively connected to a linear drive mechanism, and the other end of the linear drive mechanism is connected to the housing. The housing is provided with a strip-shaped hole, and the damping roller shaft is slidably disposed in the strip-shaped hole.

3. The double-belt roller variable diameter forming device for a round bundling machine according to claim 2, characterized in that: The linear drive mechanism includes an electric push rod, a hydraulic cylinder, and a pneumatic cylinder.

4. The double-belt roller variable diameter forming device for a round bundling machine according to claim 1, characterized in that: A fixed roller is provided on both sides of the feed inlet and at the bottom of the bundling cavity. The fixed roller at the feed inlet has a quartz sand coating on its surface and a larger diameter than the other fixed rollers.

5. The double-belt roller variable diameter forming device for a round bundling machine according to claim 1, characterized in that: The machine housing is provided with a feeding scraper, which is located on both sides of the feeding port. The feeding scraper is L-shaped, and the inner end of the feeding scraper is close to the forming belt and has a brush strip in the direction of the forming belt.

6. The double-belt roller variable diameter forming device for a round bundling machine according to claim 1, characterized in that: The feeding conveyor mechanism is hinged to one side of the feed inlet. The feeding conveyor mechanism is a belt conveyor mechanism. The hinged end of the belt conveyor mechanism is close to the feed inlet, and the movable end can be raised and lowered. The feeding conveyor mechanism can swing upward from 0° to 90°.

7. The double-belt roller variable diameter forming device for a round bundling machine according to claim 1, characterized in that: A feeding roller is installed on the housing of the pre-forming chamber. The feeding roller is connected to a motor and is located above the feed inlet and the feeding conveying mechanism. Two opposing spiral blades are symmetrically arranged on the feeding roller. A lifting mechanism is connected to the outer end of the feeding conveying mechanism. The rotation direction of the feeding roller is opposite to the rotation direction of the belt of the feeding conveying mechanism.

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