A cyclic calendering granulation device

Abstract

The application relates to a circulating calender granulating device, belonging to the field of granulator equipment, which comprises a distributing mechanism, a circulating conveying mechanism and a feeding mechanism, the distributing mechanism is installed below a cutter mechanism, the distributing mechanism comprises a limiting seat, a limiting cylinder and a first distributing disc, the limiting seat is provided with a sliding groove in the length direction, the limiting cylinder is installed on the upper end of the limiting seat, the piston rod is arranged towards the sliding groove, a limiting block is arranged on the piston rod of the limiting cylinder, a first sliding block is installed on the lower plate surface of the first distributing disc, the first sliding block is slidingly connected in the sliding groove, the limiting block can extrude the first sliding block to move, a first limiting spring is arranged on the first sliding block, the first limiting spring is connected with the side wall of the sliding groove away from the first sliding block, a first screening hole is arranged on the first distributing disc, a circulating distributing mechanism is installed at the discharging end of the first distributing disc, and the feeding mechanism is installed below the first distributing disc. The application has the effect of reducing the waste of production raw materials.

Description

Technical Field

[0001] This application relates to the field of granulation equipment, and more particularly to a circulating calendering granulation apparatus. Background Technology

[0002] Currently, traditional granulation methods in powder material granulation technology mainly include spray drying granulation, extrusion granulation, and drum granulation. Each method has its own characteristics. For example, spray drying granulation can achieve continuous operation, but it has high equipment costs and energy consumption; extrusion granulation requires less investment, but its granulation efficiency is low and product quality is difficult to control. In recent years, with the expansion of industry and technological progress, the market demand for improving granulation efficiency, reducing energy consumption, and improving product quality has been increasing, prompting the research and development of new technologies and equipment.

[0003] To address the aforementioned needs, existing improvements in the market mainly include using new high-efficiency mixers to improve the uniformity of raw materials, adjusting the gap between pressure rollers to improve particle size distribution, and introducing automated control systems to enhance the overall intelligence level of the system.

[0004] For example, Chinese Patent 202011234307.X discloses a calendering granulator, including a frame with a roller pressing mechanism on the frame. The roller pressing mechanism includes a first extrusion roller and a second extrusion roller. The first extrusion roller has multiple first extrusion grooves evenly distributed on its surface, each extending along the axial length of the roller surface and penetrating both end faces of the roller surface. A forming ring is also provided on each end face of the first extrusion roller, and a discharge hole is provided on the forming ring, which communicates with the first extrusion grooves. The second extrusion roller has multiple second extrusion grooves evenly distributed on its surface, each distributed along the axial length of the roller surface, and both ends of the second extrusion grooves are sealed. A cutting mechanism is provided at the discharge hole of the forming ring. The cross-section of the first extrusion groove is U-shaped, and the cross-section of the second extrusion groove is triangular. Both the first and second extrusion rollers are heatable. The cutting mechanism includes a blade holder and blades. The blade is mounted on the blade holder and rotates via a blade drive mechanism. One end of the blade holder is connected to the frame and can rotate around its connection. A limiting mechanism for restricting the rotation angle of the blade holder is also provided on the frame. A tension spring is also provided on the blade holder and connected to the frame. The distance between the blade of the cutting mechanism and the end face of the forming ring is 1-3mm. A guide chute is provided below each cutting mechanism. The outlet of one guide chute is connected to the conveyor belt structure via a vibrating guide chute, and the outlet of the other guide chute is directly connected to the conveyor belt structure. The second extrusion roller is mounted on a second bearing seat, which is a movable mechanism. A drive mechanism is provided on the frame and connected to the second bearing seat, driving the second bearing seat to translate along the frame. A guide roller is provided between the bottom of the second bearing seat and the frame, and a displacement sensor is provided on the second bearing seat. Because it is processed using a single-stage forming method, if the forming fails or the quality is substandard, it is necessary to re-feed materials, resulting in serious waste of raw materials. Summary of the Invention

[0005] In order to reduce the waste of raw materials in production, this application provides a circulating calendering and granulation apparatus.

[0006] The cyclic calendering and granulation apparatus provided in this application adopts the following technical solution:

[0007] A circulating calendering and granulation apparatus includes a frame, a drive mechanism, and a roller pressing mechanism. The drive mechanism, feeding mechanism, roller pressing mechanism, and cutting mechanism are mounted on the frame. The drive mechanism drives the roller pressing mechanism, the feeding mechanism is mounted on the roller pressing mechanism and feeds material into the roller pressing mechanism, and the cutting mechanism is installed at the discharge port of the roller pressing mechanism. The apparatus also includes a material distribution mechanism, a circulating conveying mechanism, and a feeding mechanism. The material distribution mechanism is installed below the cutting mechanism and includes a limiting seat, a limiting cylinder, and a first material distribution plate. The limiting seat has a groove along its length. A limiting cylinder is installed on the upper end of the limiting seat, with the piston rod facing into the slide groove. A limiting block is provided on the piston rod of the limiting cylinder. A first slider is installed on the lower plate of the first material distribution plate. The first slider is slidably connected in the slide groove. The limiting block can squeeze the first slider to move it. A first limiting spring is provided on the first slider. The side of the first limiting spring away from the first slider is connected to the side wall of the slide groove. A first screening hole is provided on the first material distribution plate. The circulating material distribution mechanism is installed at the discharge end of the first material distribution plate. The feeding mechanism is installed below the first material distribution plate.

[0008] By adopting the above technical solution, the limiting cylinder is installed in the limiting seat. The limiting cylinder drives the limiting block to move into the slide groove. The limiting block pushes the first slider installed on the first distribution plate to slide in the slide groove and squeeze the first limiting spring installed in the slide groove. When the limiting cylinder resets, the first slider resets under the action of the first limiting spring. Thus, the limiting cylinder drives the limiting block to move back and forth, thereby realizing the screening of the granules by the first distribution plate. The granules with smaller diameters fall from the screening holes to the feeding mechanism, while the granules with larger diameters are circulated from one end of the first distribution plate into the feeding mechanism and then fed back into the feeding mechanism for processing. This avoids the waste of raw materials.

[0009] In one specific implementation scheme, a second distributing plate is further included. A second slider is installed on the lower plate of the second distributing plate. The second slider is slidably connected in the chute. The limiting block is located at the middle part between the first limiting block and the second limiting block. The second distributing plate is located below the first distributing plate. A second limiting spring is provided on the second limiting block. The end of the second limiting spring away from the second slider is connected to the side wall of the chute. The first limiting spring and the second limiting spring are symmetrically installed relative to the limiting block. A second screening hole is provided on the second distributing plate.

[0010] By adopting the above technical solution, the second distribution plate is installed below the first distribution plate. The granules screened off from the first distribution plate enter the second distribution plate, and the second distribution plate screens the granules again, thereby screening the granules with too small a particle size into the circulating distribution mechanism and screening the granules with a suitable particle size into the feeding mechanism, thereby further ensuring the utilization of raw materials.

[0011] In one specific implementation scheme, the first and second distributing discs are inclined, with the first and second distributing discs inclined in opposite directions. The circulating conveying mechanism is installed at the lower end of the second distributing disc, and the feeding mechanism is installed at the lower end of the first distributing disc.

[0012] By adopting the above technical solution, the first and second distribution discs are inclined and their inclination directions are opposite. The circulating conveying mechanism is installed at the lower end of the second distribution disc, and the feeding mechanism is installed at the lower end of the first distribution disc, thereby avoiding the fact that the particles with moderate particle size and the particles with larger particle size have the same discharge direction, which would cause the particles to mix again.

[0013] In one specific implementation, a collection hopper is also included, which is installed on the circulating conveying mechanism and is located below the second distribution plate, and is capable of collecting the material screened out from the lower end of the first distribution plate.

[0014] By adopting the above technical solution, the collecting hopper is installed on the circulating conveying mechanism. The collecting hopper is located below the second distributing plate and can collect the material screened out from the lower end of the first distributing plate, thereby facilitating the collection and circulating calendering of both small and large particle sizes.

[0015] In one specific implementation, two limiting seats are provided, and the two limiting seats are respectively installed on both sides of the first dispensing plate. Two first sliders are provided and installed in corresponding positions. The two first sliders are respectively slidably connected to the limiting seats on both sides.

[0016] By adopting the above technical solution, two limit seats are provided, which are installed on both sides of the first material distribution plate, and two first sliders are provided accordingly, thereby ensuring the stability of the first material distribution plate when screening materials.

[0017] In one specific implementation, the feeding mechanism includes a support frame and a feeding bin, the support frame is mounted on the frame, the feeding bin is mounted on the frame, and the feeding bin outlet is located above the roller pressing mechanism.

[0018] In one specific implementation, the system further includes a stirring mechanism, which includes a stirring motor and a stirring roller. The stirring roller is rotatably connected inside the feeding hopper. The stirring motor is mounted on the side wall of the feeding hopper, and its output shaft is connected to the stirring roller. Stirring blades are mounted on the stirring roller.

[0019] By adopting the above technical solution, the stirring roller is rotatably connected inside the feeding hopper, and the stirring motor is installed on the side wall of the feeding hopper with its output shaft connected to the stirring roller. Thus, the stirring motor drives the stirring roller to rotate, which fully mixes materials of different components, ensuring that the materials have a uniform composition distribution before entering the calendering and extrusion process. At the same time, it can prevent the materials from separating in the feeding hopper, ensuring that the quality of each batch of materials is consistent.

[0020] In one specific implementation, a plurality of stirring blades are provided, and the plurality of stirring blades are distributedly installed on the circumferential portion of the stirring roller.

[0021] In one specific implementation scheme, the circulating conveying mechanism includes a conveyor belt structure and a circulating bin, with the conveyor belt structure installed at the discharge end of the first material distribution plate and the circulating bin installed at the discharge end of the conveyor belt structure.

[0022] In one specific implementation scheme, the system further includes a circulation pipe and a fan. The circulation pipe is connected to the circulation chamber, and the fan is mounted on the circulation pipe. The end of the circulation pipe facing away from the circulation chamber is connected to the feeding mechanism and is capable of filling the feeding mechanism with filler.

[0023] By adopting the above technical solution, the circulation pipe is set up and the fan draws air to suck the granular material stored in the circulation bin into the feeding bin, thereby improving the convenience of circulation feeding.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. A limit cylinder is installed in a limit seat. The limit cylinder drives the limit block to move into the slide groove. The limit block pushes the first slider installed on the first distribution plate to slide in the slide groove and squeeze the first limit spring installed in the slide groove. When the limit cylinder is reset, the first slider is reset under the action of the first limit spring. Thus, the limit cylinder drives the limit block to move back and forth, thereby realizing the screening of the granules by the first distribution plate. The smaller granules fall from the screen holes to the feeding mechanism, and the larger granules are circulated from one end of the first distribution plate into the distribution mechanism and then fed back into the feeding mechanism for processing, thereby avoiding the waste of raw materials.

[0026] 2. The second distribution plate is installed below the first distribution plate. The granules screened off from the first distribution plate enter the second distribution plate. The second distribution plate screens the granules again, so that the granules with too small a particle size are screened into the circulating distribution mechanism, and the granules with a suitable particle size are screened into the feeding mechanism, thereby further ensuring the utilization of raw materials.

[0027] 3. The stirring roller is rotatably connected inside the feeding hopper. The stirring motor is installed on the side wall of the feeding hopper, and its output shaft is connected to the stirring roller. Thus, the stirring motor drives the stirring roller to rotate, which fully mixes materials of different components. This ensures that the materials have a uniform composition distribution before entering the calendering and extrusion process. At the same time, it can prevent the materials from separating in the feeding hopper and ensure that the quality of each batch of materials is consistent. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0029] Figure 2 This is a schematic diagram of the feeding mechanism.

[0030] Figure 3 This is a schematic diagram of the material distribution mechanism in an embodiment of this application.

[0031] Figure 4 A sectional view showing the internal structure of the limit seat.

[0032] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Drive mechanism; 21. First main motor; 22. Second main motor; 3. Roller pressing mechanism; 31. First extrusion roller; 32. Second extrusion roller; 4. Cutting mechanism; 5. Material distribution mechanism; 51. Limiting seat; 52. Limiting cylinder; 521. Limiting block; 53. First material distribution plate; 531. First slider; 532. First limiting spring; 533. First sieve hole; 54. Second material distribution plate; 541. Second slider; 542. Second limiting spring; 543. Second sieve hole; 6. Circulating conveying mechanism; 61. Conveyor belt mechanism; 7. Feeding mechanism; 8. Loading mechanism; 81. Support frame; 82. Loading bin; 83. Mixing device; 831. Mixing motor; 832. Mixing roller; 833. Mixing blade; 9. Fan; 10. Circulation pipe. Detailed Implementation

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] This application discloses a cyclic calendering granulation apparatus.

[0035] like Figure 1 As shown, the circulating calendering and granulation device includes a frame 1, a drive mechanism 2, a roller pressing mechanism 3, a material distribution mechanism 5, a circulating conveying mechanism 6, and a feeding mechanism 7. The drive mechanism 2 and the roller pressing mechanism 3 are both mounted on the frame 1. The drive mechanism 2 is connected to the roller pressing mechanism 3, driving the roller pressing mechanism 3 to calender the raw materials. A cutting mechanism 4 is mounted on the frame 1, installed at the discharge ports at both ends of the roller pressing mechanism 3. The cutting mechanism 4 is used to cut the calendered material. A guide plate is installed below the cutting mechanism 4. The material distribution mechanism 5 is installed at the discharge port of the guide plate. The feeding mechanism 7 is used to transport the qualified calendered and cut material for further processing. The circulating conveying mechanism 6 is used to recover and transport the unqualified granules screened by the material distribution mechanism 5 to the feeding mechanism 8 for further calendering and cutting.

[0036] The rolling mechanism 3 includes a first extrusion roller 31 and a second extrusion roller 32. The first extrusion roller 31 is mounted on the frame 1 at both ends via a first bearing seat, and the second extrusion roller 32 is fixed to the frame 1 at both ends via a second bearing seat. Since the first extrusion roller 31 and the second extrusion roller 32 are both relatively heavy, they need to be lubricated by lubricating oil through both the first bearing seat and the second bearing seat.

[0037] The drive mechanism 2 includes a first main motor 21 and a second main motor 22. The first main motor 21 is connected to the first extrusion roller 31 through a main universal coupling and drives the first extrusion roller 31 to rotate. The second main motor 22 is connected to the second extrusion roller 32 through a main universal coupling and drives the second extrusion roller 32 to rotate. The first extrusion roller 31 and the second extrusion roller 32 rotate in opposite directions.

[0038] It also includes a feeding mechanism 8, which includes a support frame 81 and a feeding bin 82. The support frame 81 is mounted on the support frame 81, and the feeding bin 82 is mounted on the upper end of the support frame 81. The feeding bin 82 is located above the first extrusion roller 31 and the second extrusion roller 32. The feeding bin 82 is preferably configured as a hopper, and the discharge port of the feeding bin 82 is located at the middle part of the first extrusion roller 31 and the second extrusion roller 32.

[0039] In this embodiment, a stirring device 83 is also included. The stirring device 83 includes a stirring motor 831 and a stirring roller 832. The stirring roller 832 is rotatably connected to the feeding hopper 82 and installed at the discharge port. The stirring roller 832 is installed along the length of the first extrusion roller 31 and the second extrusion roller 32. The stirring motor 831 is installed on the side wall of the feeding hopper 82. The output shaft of the stirring motor 831 is connected to the stirring roller 832. The stirring roller 832 is equipped with stirring blades 833. The shape and arrangement of the blades can be optimized according to the material characteristics. The stirring blades 833 can be paddle-type, spiral-type, turbine-type, etc. There are several stirring blades 833. The several stirring blades 833 are distributed on the circumferential part of the stirring roller 832. The stirring motor 831 drives the stirring roller 832 to rotate, which fully mixes materials of different components, ensuring that the materials have a uniform composition distribution before entering the calendering and extrusion process. At the same time, it can prevent the materials from stratifying in the feeding hopper and ensure that the quality of each batch of materials is consistent.

[0040] like Figure 3 and Figure 4 As shown, the material distribution mechanism 5 includes a limiting seat 51, a limiting cylinder 52, a first material distribution plate 53, and a second material distribution plate 54. Two limiting seats 51 and two limiting cylinders 52 are provided. The two limiting seats 51 are installed side-by-side. A sliding groove is provided on the limiting seat 51, penetrating the upper sidewall of the limiting seat 51. The limiting cylinder 52 is installed on the upper surface of the limiting seat 51, with its piston rod facing inwards towards the sliding groove. A limiting block 521 is installed on the piston rod of the limiting cylinder 52. The limiting block 521 is trapezoidal in shape; in other embodiments, it can also be semi-circular, arc-shaped, or other shapes. The two inclined sides of the limiting block 521 are positioned relative to the length direction of the sliding groove. Two first sliding blocks 531 are installed on the lower surface of the first material distribution plate 53 corresponding to the two limiting seats 51. Two second sliders 541 are installed on the lower end face of the two limiting seats 51. The second dividing plate is located below the first dividing plate. The first slider 531 and the second slider 541 are symmetrically installed in the slide groove along the height direction of the limiting block 521. The side walls of the first slider 531 and the second slider 541 on the adjacent side are set as inclined surfaces corresponding to the limiting block 521. The first limiting spring 532 and the second limiting spring 542 are respectively installed on the side wall of the first slider 531 and the second slider 541 that are opposite to each other. The first limiting spring 532 and the second limiting spring 542 are installed along the length direction of the slide groove. The first limiting spring 532 and the second limiting spring 542 are respectively fixedly connected to the side wall of the slide groove on the adjacent side of the first slider 531 and the second slider 541.

[0041] A limiting cylinder 52 is installed inside a limiting seat 51. The limiting cylinder 52 drives a limiting block 521 to move into the chute. The limiting block 521 pushes a first slider 531 mounted on the first distribution plate 53 to slide in the chute and presses a first limiting spring 532 mounted in the chute. When the limiting cylinder 52 resets, the first slider 531 resets under the action of the first limiting spring 532. Thus, the limiting cylinder 52 drives the limiting block 521 to move back and forth, thereby realizing the screening of the granules by the first distribution plate 53, allowing smaller granules to fall from the screen holes. On the second distribution plate 54, larger particles are fed into the circulating distribution mechanism 5 from one end of the first distribution plate 53 and then fed back into the feeding mechanism 8 for processing. Particles that fall onto the second distribution plate 54 are screened again. Particles of moderate size fall from the outlet of the second distribution plate 54 onto the feeding mechanism 7 and are collected for the next processing step. Smaller particles fall from the screen holes into the circulating distribution mechanism 5 and are fed back into the feeding mechanism 8 for processing, thereby further ensuring the utilization of raw materials and avoiding waste.

[0042] The first material distribution plate 53 has a first screening hole, and the second material distribution plate 54 has a second screening hole. The first screening hole is located on the side of the first material distribution plate 53 away from the first limiting spring 532. The side of the first material distribution plate 53 adjacent to the first limiting spring 532 is a solid plate. The second screening hole is located on the side of the second material distribution plate 54 away from the second limiting spring 542. The side of the second material distribution plate 54 adjacent to the second limiting spring 542 is a solid plate. The ratio between the area of ​​the perforated surface and the unperforated surface on the first material distribution plate 53 and the second material distribution plate 54 is set within the range of 1:3 to 1:4.

[0043] In this embodiment, the first material distribution plate 53 and the second material distribution plate 54 are inclined, and the first material distribution plate 53 and the second material distribution plate 54 are inclined in opposite directions. The inclination angle is usually set between 10° and 15°. The circulating conveying mechanism 6 is installed at the lower end of the second material distribution plate 54, and the feeding mechanism 7 is installed at the lower end of the first material distribution plate 53.

[0044] The first and second distribution discs 53 and 54 are inclined and their inclination directions are opposite. The circulating conveying mechanism 6 is installed at the lower end of the second distribution disc 54, and the feeding mechanism 7 is installed at the lower end of the first distribution disc 53. This avoids the discharge direction of particles with moderate particle size and particles with larger particle size being the same, which would cause particles of different particle sizes to be mixed again.

[0045] The circulating conveying mechanism 6 includes a conveyor belt structure and a circulating bin. The conveyor belt structure is installed at one end of the discharge port of the first discharge plate, and the circulating bin is installed on the conveyor belt structure. The inlet of the circulating bin is located below the second discharge plate and can collect the granules screened off from the discharge port of the first discharge plate. The feeding mechanism 7 can use the same conveyor belt device as the conveyor belt structure. The conveyor belt device is preferably a common conveyor belt on the market. The feeding mechanism 7 is installed at the discharge port of the second discharge plate.

[0046] In this embodiment of the application, a circulation pipe 10 and a blower 9 are also included. The circulation pipe 10 is connected to the circulation chamber, and the blower 9 is installed on the circulation pipe 10. The end of the circulation pipe 10 away from the circulation chamber is connected to the feeding hopper 82 and can fill the feeding hopper 82 with filler.

[0047] The implementation principle of the circulating calendering granulation device in this application embodiment is as follows: A limiting cylinder 52 is installed inside a limiting seat 51. The limiting cylinder 52 drives a limiting block 521 to move into the chute. The limiting block 521 pushes a first slider 531 installed on a first distribution plate 53 to slide within the chute and presses against a first limiting spring 532 installed within the chute. When the limiting cylinder 52 resets, the first slider 531 resets under the action of the first limiting spring 532. Thus, the limiting cylinder 52 drives the limiting block 521 to reciprocate, thereby achieving the screening of the granules by the first distribution plate 53, resulting in smaller particle sizes. The granules fall from the screen holes onto the second distribution plate 54. Larger granules are circulated from one end of the first distribution plate 53 into the distribution mechanism 5 and then fed back onto the feeding mechanism 8 for processing. The granules that fall onto the second distribution plate 54 are screened again. Particles of moderate size fall from the outlet of the second distribution plate 54 onto the feeding mechanism 7 and are collected for the next processing step. Smaller granules fall from the screen holes into the circulation distribution mechanism 5 and are fed back onto the feeding mechanism 8 for processing, thereby further ensuring the utilization of raw materials and avoiding waste.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cyclic calender granulating device, comprising a frame (1), a driving mechanism (2) and a roller mechanism (3), the driving mechanism (2), a feeding mechanism (8), the roller mechanism (3) and a cutter mechanism (4) are installed on the frame (1), the driving mechanism (2) is used for driving the roller mechanism (3), the feeding mechanism (8) is installed on the roller mechanism (3) and is used for feeding into the roller mechanism (3), the cutter mechanism (4) is installed at the discharging port of the roller mechanism (3), characterized in that: It also includes a material distribution mechanism (5), a circulating conveying mechanism (6) and a feeding mechanism (7), the material distribution mechanism (5) is installed below the cutter mechanism (4), the material distribution mechanism (5) includes a limiting seat (51), a limiting cylinder (52) and a first material distribution disc (53), the limiting seat (51) is provided with a sliding groove in the length direction, the limiting cylinder (52) is installed on the upper end of the limiting seat (51), and the piston rod is arranged towards the sliding groove, the limiting cylinder (52) is provided with a limiting block (521) on the piston rod, the first material distribution disc (53) is installed with a first sliding block (531) on the lower plate surface, the first sliding block (531) is slidably connected in the sliding groove, the limiting block (521) can extrude the first sliding block (531) to move, the first sliding block (531) is provided with a first limiting spring (532), one side of the first limiting spring (532) away from the first sliding block (531) is connected with the side wall of the sliding groove, the first material distribution disc (53) is provided with a first screening hole, the circulating conveying mechanism (6) is installed at the discharging end of the first material distribution disc (53), and the feeding mechanism (7) is installed below the first material distribution disc (53). ​ It also includes a second material distribution disc (54), the second material distribution disc (54) is installed with a second sliding block (541) on the lower plate surface, the second sliding block (541) is slidably connected in the sliding groove, the limiting block (521) is located at the intermediate position between the first sliding block (531) and the second sliding block (541), the second material distribution disc (54) is located below the first material distribution disc (53), the second sliding block (541) is provided with a second limiting spring (542), one end of the second limiting spring (542) away from the second sliding block (541) is connected with the side wall of the sliding groove, the first limiting spring (532) and the second limiting spring (542) are symmetrically installed with respect to the limiting block (521), and the second material distribution disc (54) is provided with a second screening hole. The side wall of the first sliding block (531) and the second sliding block (541) adjacent to each other is provided with a slope corresponding to the limiting block (521); The first material distribution disc (53) and the second material distribution disc (54) are inclined to be arranged, the first material distribution disc (53) and the second material distribution disc (54) are oppositely arranged in the inclined direction, the feeding mechanism (7) is installed at the lower end of the second material distribution disc (54), and the circulating conveying mechanism (6) is installed at the lower end of the first material distribution disc (53).

2. The cyclic calendering granulation apparatus according to claim 1, wherein: It also includes a material collecting hopper, the material collecting hopper is installed on the circulating conveying mechanism (6), and the material collecting hopper is located below the second material distribution disc (54) and can collect the materials screened out from the lower end of the first material distribution disc (53).

3. The cyclic calendering granulation apparatus according to claim 1, wherein: The limiting seat (51) is provided with two, the first sliding block (531) is provided with two and is correspondingly installed, and the first sliding block (531) is slidably connected in the limiting seat (51) on both sides.

4. The cyclic calendering granulation apparatus according to claim 1, wherein: The feeding mechanism (8) includes a support frame (81) and a feeding bin (82). The support frame (81) is installed on the frame (1), and the feeding bin (82) is installed on the frame (1). The discharge port of the feeding bin (82) is located above the roller pressing mechanism (3).

5. The cyclic calendering granulation apparatus according to claim 4, wherein: It also includes a stirring device (83), which includes a stirring motor (831) and a stirring roller (832). The stirring roller (832) is rotatably connected inside the feeding hopper (82). The stirring motor (831) is installed on the side wall of the feeding hopper (82), and its output shaft is connected to the stirring roller (832). The stirring roller (832) is equipped with stirring blades (833).

6. The cyclic calendering granulation apparatus according to claim 5, wherein: The stirring blades (833) are provided in a plurality of manner, and the plurality of stirring blades (833) are distributedly installed on the circumferential part of the stirring roller (832).

7. The cyclic calendering granulation apparatus according to claim 1, wherein: The circulating conveying mechanism (6) includes a conveyor belt mechanism (61) and a circulating bin. The conveyor belt mechanism (61) is installed at the discharge end of the first material distribution plate (53), and the circulating bin is installed at the discharge end of the conveyor belt mechanism (61).

8. The cyclic calendering granulation apparatus according to claim 7, wherein: It also includes a circulation pipe (10) and a fan (9). The circulation pipe (10) is connected to the circulation chamber, and the fan (9) is installed on the circulation pipe (10). The end of the circulation pipe (10) away from the circulation chamber is connected to the feeding mechanism (8) and can fill the feeding mechanism (8).

Images