Granulator

Abstract

The invention discloses a pelletizer, which comprises: a housing, the interior of the housing is enclosed to form a cavity, the side wall of the middle part of the cavity protrudes towards the center of the cavity to form a limiting part, the bottom side of the cavity is provided with forming cavities, the bottom sides of the plurality of forming cavities are respectively provided with a plurality of discharge ports, and the outer side of the bottom of the cavity is provided with a feed port; an annular protrusion is arranged on the outer side of the middle of the shaking seat, one side of the annular protrusion abuts against one side of the limiting part, and extrusion heads are arranged at the positions, corresponding to the multiple forming cavities, of the bottom side of the shaking seat correspondingly; and the rotating device is connected to the top side of the shell, the rotating device is provided with a top pressing piece capable of rotating around the center, the bottom side of the top pressing piece is an arc-shaped surface, and the bottom side of the top pressing piece abuts against the top side of the shaking base so that the shaking base can be obliquely arranged in the cavity. And the uniformity and quality of extrusion molding can be ensured, the power consumption required by extrusion discharging is reduced, and the practicability is higher.

Description

Technical Field

[0001] The present invention relates to plastic processing equipment, in particular to a granulator. Background Art

[0002] Plastic raw materials or waste plastics are fed into a melting machine at high temperatures, transforming them from a solid state into a viscous flow. They are then extruded into continuous strips, cooled and solidified in a water-cooling system, and finally cut. Extrusion of the molten material is a critical step in the entire process. Current pelletizers typically use a screw for extrusion, which requires high pressure. This is especially true for extruding high-viscosity materials or for extruding a large number of strips at a time, requiring even greater power. Otherwise, uneven discharge can occur. Therefore, a pelletizer that reduces power consumption during extrusion is urgently needed. Summary of the Invention

[0003] The object of the present invention is to provide a granulator to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The solution of the present invention to solve its technical problems is:

[0005] 18. The swiveling device as claimed in claim 17, wherein the guide rail is constructed so that the upper and lower ends of the sprocket wheel, the lower ends of the sprocket wheel, and the lower ends of the sprocket wheel are connected along the longitudinal direction of the rotation of the steering column, and the rotation of the steering column is controlled by the control wheel to control the rotation of the steering column.

[0006] This technical solution has at least the following beneficial effects: the rocking seat is placed obliquely in the cavity, the limiting portion is used to abut against one side of the annular protrusion to maintain the tilted state of the rocking seat, and the top pressure piece in the rotating device is used to press the rocking seat so that the extrusion head at the lowest point on the bottom side of the rocking seat enters the opposite molding cavity. During operation, molten material can be input from the feed port so that the molten material is filled to the bottom of the cavity. The extrusion head in the rotating device rotates around the center of the cavity, and the extrusion head applies pressure from different positions on the top side of the rocking seat, so that the rocking seat rotates with the inner side of the limiting portion as the fulcrum. During the rotation process, the rocking seat can drive multiple extrusion heads on its bottom side to enter in sequence. In multiple molding cavities, during this process, when the extrusion head located at the highest point on the bottom side of the rocking seat is away from the molding cavity directly opposite to it, the molten material can be added to the molding cavity. As the rocking seat continues to rotate, the extrusion head gradually enters the molding cavity directly opposite to it. When it reaches the lowest point, the extrusion head completely enters the molding cavity and squeezes the molten material in the molding cavity out from the multiple discharge ports on the bottom side. In this way, multiple discharge ports of the multiple molding cavities on the bottom side of the shell can extrude and discharge materials, realizing large-area discharge. Moreover, by filling and extruding the multiple molding cavities separately, the uniformity and quality of the extrusion molding can be guaranteed, the power consumption required for extrusion discharge can be reduced, and the practicality is stronger.

[0007] As a further improvement to the above technical solution, the rotating device includes a motor and a turntable. The motor is connected to the top side of the housing, and the turntable is rotatably connected to the top side of the cavity. The output end of the motor extends into the housing and drives the turntable, and the pressure member is connected to the bottom side of the turntable. The motor is mounted on the top side of the housing, and its output end extends into the cavity and drives the turntable, providing a rotational driving force for the turntable. The turntable drives the pressure member to rotate around the center of the cavity, so that the pressure member presses against the top side of the rocking seat in an annular path, driving the rocking seat to rotate with the inner side of the limit portion as the fulcrum.

[0008] As a further improvement to the above technical solution, a limit frame is connected to the bottom side of the turntable away from the top pressure piece. One side of the limit frame is slidably connected to the position of the cavity above the limit portion. A universal wheel is provided on the other side of the limit frame. The rolling end of the universal wheel abuts against the position of the rocking seat above the annular protrusion. When the turntable rotates, the limit frame can be driven to rotate around the center of the cavity. Since one side of the limit frame is slidably connected to the cavity and the other side abuts against the rocking seat through the universal wheel, the top pressure piece and the limit frame are used to limit the top and side positions of the rocking seat respectively, and provide power for the rocking seat to rock in the cavity, so that the rocking seat rotates more stably in the cavity.

[0009] As a further improvement to the above technical solution, the side of the position-limiting portion proximal to the annular protrusion is a supporting surface. The supporting surface has an arcuate cross-section, and the arcuate opening of the supporting surface is tilted upward toward the center of the cavity. The outer side of the annular protrusion and the supporting surface are mutually adapted. The arcuate supporting surface can better abut against the outer side of the annular protrusion, thereby improving the stability of the position-limiting portion's support of the annular protrusion. Since the arcuate opening of the supporting surface is tilted upward toward the center of the cavity, it can provide a certain supporting force for the annular protrusion, making the extrusion head more stable when entering and exiting the forming cavity.

[0010] As a further improvement to the above technical solution, the distance between the pressing member and the annular protrusion is greater than the distance between the annular protrusion and any of the extrusion heads. Because the annular protrusion abuts against the stopper to form a rotational fulcrum, the force arm formed between the pressing member and the annular protrusion is greater than the force arm between the annular protrusion and the extrusion head. Therefore, the pressing member exerts less pressure on the rocking seat, while the extrusion head exerts greater pressure on the material in the molding cavity. This further reduces the force applied to the rocking seat, thereby further reducing power consumption.

[0011] As a further improvement to the above technical solution, a confluence section is formed at the bottom of the cavity, with the space of the confluence section gradually narrowing from top to bottom. The feed port is located on the confluence section. Material input from the feed port enters the confluence section, and the confluence section narrows downward to allow the material to accumulate more quickly in the forming cavity, thereby improving the material's fluidity and the efficiency of material replenishment into the forming cavity.

[0012] As a further improvement to the above technical solution, a distribution pipe is provided on the outside of the housing at a position corresponding to the confluence section. The distribution pipe extends around the housing, and a connecting pipe is provided on the outside of the distribution pipe. Multiple feed ports are provided around the confluence section, and the multiple feed ports are respectively connected to the distribution pipe. The connecting pipe is used to connect to an external melting device, and the melting device inputs molten material into the distribution pipe through the connecting pipe. At this time, the molten material surrounds and fills the outside of the housing and enters the confluence section from the multiple feed ports at different positions in the confluence section. This improves the efficiency of filling the multiple molding cavities with material, thereby ensuring that the molding cavity can be replenished with material in a timely manner when the extrusion head leaves the molding cavity.

[0013] As a further improvement to the above technical solution, a limiting groove is provided around the center of the top side of the rocking seat, and the bottom surface of the pressing member abuts against the limiting groove. The bottom surface of the pressing member abuts against the inner side of the limiting groove, thereby increasing the contact area between the pressing member and the rocking seat. When the pressing member moves around the top side of the rocking seat, the bottom surface of the pressing member enters the limiting groove, thereby improving the stability of the force applied by the pressing member to the rocking seat.

[0014] As a further improvement to the above technical solution, the housing includes a top cover, a main shell, and a bottom shell. The top cover is connected to the top side of the main shell, and the bottom shell is connected to the bottom side of the main shell. The top cover, the main shell, and the bottom shell enclose the cavity, the limit portion is formed in the main shell, and the molding cavity and the feed port are arranged in the bottom shell. The top cover, the main shell, and the bottom shell can be produced independently during production, facilitating the formation of structures such as the limit portion supporting the rocking seat in the main shell, and facilitating the formation of multiple molding cavities on the bottom side of the bottom shell. Finally, the top cover, the main shell, and the bottom shell are assembled into a whole, thereby improving the efficiency of the entire housing production.

[0015] As a further improvement to the above technical solution, the top cover and the bottom shell are each detachably connected to the main shell. The top cover, main shell, and bottom shell are detachable from each other. After extended use, any component can be independently replaced and maintained as needed. During maintenance, the required position can be disassembled and assembled according to different situations. For example, when the rocking seat needs to be maintained and replaced, the top cover is removed; when the molding cavity needs to be cleaned, the bottom cover is removed, thereby improving flexibility and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments. Obviously, the drawings described only illustrate some embodiments of the present invention, not all of them. Those skilled in the art can derive other design solutions and drawings based on these drawings without inventive effort.

[0017] Figure 1 It is an overall front view of the present invention.

[0018] Figure 2 yes Figure 1 AA cross-sectional structure diagram.

[0019] In the accompanying drawings: 1- shell, 11- cavity, 12- limiting part, 121- supporting surface, 13- molding cavity, 14- discharge port, 15- feed port, 16- confluence section, 17- top cover, 18- main shell, 19- bottom shell, 2- rocking seat, 21- annular protrusion, 22- extrusion head, 23- limiting groove, 31- top pressure piece, 32- motor, 33- turntable, 34- limiting frame, 35- universal wheel, 4- distribution pipe. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, all the connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connecting accessories according to the specific implementation situation. The various technical features in the invention can be combined interactively without conflicting with each other.

[0021] Reference Figure 1 and Figure 2 A granulator comprises: a shell 1, wherein a cavity 11 is formed in an enclosed manner inside the shell, a middle side wall of the cavity 11 protrudes toward the center of the cavity 11 to form a limiting portion 12, a molding cavity 13 is provided on the bottom side of the cavity 11, and a plurality of molding cavities 13 are provided around the center of the cavity 11, for example, the number of molding cavities 13 is three, four or five, and a plurality of discharge ports 14 are provided on the bottom sides of the plurality of molding cavities 13, and a feeding port 15 is provided on the outer side of the bottom of the cavity 11; a shaking seat 2, wherein an annular protrusion 21 is provided on the outer side of the middle part, and one side of the annular protrusion 21 abuts against one side of the limiting portion 12, so Extrusion heads 22 are respectively provided at positions corresponding to the multiple forming cavities 13 on the bottom side of the rocking seat 2; a rotating device is connected to the top side of the shell 1, and the rotating device has a top pressure piece 31 that can rotate around the center, and the bottom side of the top pressure piece 31 is an arc-shaped surface. The bottom side of the top pressure piece 31 is against the top side of the rocking seat 2 and makes the rocking seat 2 tilted in the cavity 11. When the top pressure piece 31 rotates, it can drive the multiple extrusion heads 22 to enter the multiple forming cavities 13 in turn. In actual applications, the top pressure piece 31 can be a block structure fixed to the rotating device, or a rotatable ball.

[0022] As can be seen from the above, the rocking seat 2 is placed obliquely in the cavity 11, and the limiting portion 12 is used to abut against one side of the annular protrusion 21 to maintain the tilted state of the rocking seat 2. The top pressure piece 31 in the rotating device is used to press the rocking seat 2 so that the extrusion head 22 at the lowest point on the bottom side of the rocking seat 2 enters the opposite molding cavity 13. During operation, molten material can be input from the feed port 15 so that the molten material is filled to the bottom of the cavity 11. The extrusion head 22 in the rotating device rotates around the center of the cavity 11. The extrusion head 22 applies pressure from different positions on the top side of the rocking seat 2, so that the rocking seat 2 rotates with the inner side of the limiting portion 12 as the fulcrum. During the rotation process, the rocking seat 2 can drive multiple extrusion heads 22 on its bottom side to enter multiple molding cavities in sequence. In the cavity 13, during this process, when the extrusion head 22 at the highest point on the bottom side of the rocking seat 2 is away from the molding cavity 13 opposite to it, the molten material can be added to the molding cavity 13. As the rocking seat 2 continues to rotate, the extrusion head 22 gradually enters the molding cavity 13 opposite to it. When it reaches the lowest point, the extrusion head 22 completely enters the molding cavity 13 and squeezes the molten material in the molding cavity 13 out from the multiple discharge ports 14 on the bottom side. In this way, the multiple discharge ports 14 of the multiple molding cavities 13 on the bottom side of the shell 1 can extrude and discharge materials, thereby realizing large-area discharge. Moreover, by filling and extruding the multiple molding cavities 13 separately, the uniformity and quality of the extrusion molding can be guaranteed, the power consumption required for extrusion discharge can be reduced, and the practicality is stronger.

[0023] The rotating device is mainly used to drive the top pressure member 31 to rotate on the top side of the cavity 11. Specifically, the rotating device includes a motor 32 and a turntable 33. The motor 32 is connected to the top side of the housing 1, and the turntable 33 is rotatably connected to the top side of the cavity 11. The output end of the motor 32 extends into the housing 1 and drives the turntable 33, and the top pressure member 31 is connected to the bottom side of the turntable 33. The motor 32 is installed on the top side of the housing 1, and its output end extends into the cavity 11 and drives the turntable 33, providing a rotational driving force to the turntable 33. The turntable 33 drives the top pressure member 31 to rotate around the center of the cavity 11, so that the top pressure member 31 presses against the top side of the rocking seat 2 in an annular path, driving the rocking seat 2 to rotate with the inner side of the limit portion 12 as the fulcrum.

[0024] In addition to limiting and providing power on the top side of the rocking seat 2, limiting and power can also be provided at the side position of the rocking seat 2. Specifically, the bottom side of the turntable 33 is connected to a limiting frame 34 away from the top pressure piece 31. One side of the limiting frame 34 is slidably connected to the position of the cavity 11 above the limiting portion 12. The limiting frame 34 can be slidably connected to the cavity 11 in the form of a slide rail groove, or it can be abutted against the cavity 11 by installing a universal wheel 35 to achieve sliding inside the cavity 11. A universal wheel 35 is provided on the other side of the limiting frame 34, and the rolling end of the universal wheel 35 abuts against the position of the rocking seat 2 above the annular protrusion 21. When the turntable 33 rotates, it can drive the limiting frame 34 to rotate around the center of the cavity 11. Since one side of the limiting frame 34 is slidably connected to the cavity 11, and the other side is against the rocking seat 2 through the universal wheel 35, the top pressure piece 31 and the limiting frame 34 are used to limit the top position and the side position of the rocking seat 2 respectively, and provide power for the rocking of the rocking seat 2 in the cavity 11, so that the rotation of the rocking seat 2 in the cavity 11 is more stable.

[0025] The side surface of the limiting portion 12 close to the annular protrusion 21 may be a beveled surface. In this case, the side surface of the annular protrusion 21 that abuts against the limiting portion 12 is also a beveled surface. In this embodiment, the side surface of the limiting portion 12 close to the annular protrusion 21 is a supporting surface 121. The cross-sectional shape of the supporting surface 121 is an arc. The arc-shaped opening of the supporting surface 121 is tilted upward toward the center of the cavity 11. The outer side surface of the annular protrusion 21 is adapted to the supporting surface 121. The arc-shaped supporting surface 121 can better abut and fit with the outer side surface of the annular protrusion 21, thereby improving the stability of the limiting portion 12 in supporting the annular protrusion 21. Since the arc-shaped opening of the supporting surface 121 is tilted upward toward the center of the cavity 11, it can provide a certain supporting force to the annular protrusion 21, making the extrusion head 22 more stable when entering and exiting the molding cavity 13.

[0026] To further reduce the driving force required by the extrusion head 22 to extrude the material within the molding cavity 13, in this embodiment, the distance between the pressing member 31 and the annular protrusion 21 is greater than the distance between the annular protrusion 21 and any of the extrusion heads 22. Because the annular protrusion 21 abuts against the limiting portion 12 to form a rotational fulcrum, the moment arm formed between the pressing member 31 and the annular protrusion 21 is greater than the moment arm between the annular protrusion 21 and the extrusion head 22. Therefore, the pressing member 31 applies less pressure to the rocking seat 2, allowing the extrusion head 22 to exert greater pressure on the material within the molding cavity 13. This further reduces the force applied to the rocking seat 2, thereby further reducing power consumption.

[0027] In some embodiments, a confluence section 16 is formed at the bottom of the cavity 11. The space of the confluence section 16 gradually decreases from top to bottom, and the feed port 15 is disposed on the confluence section 16. The material input from the feed port 15 enters the confluence section 16. The confluence section 16 narrows downward, allowing the material to accumulate more quickly in the molding cavity 13, thereby improving the fluidity of the material and the efficiency of replenishing the material into the molding cavity 13.

[0028] When there is only one feed port 15, when multiple molding cavities 13 need to be filled with material, the material filling rate in molding cavities 13 farther from the feed port 15 will be slower. To ensure timely replenishment of material into the multiple molding cavities 13, in this embodiment, a distribution pipe 4 is provided on the outside of the housing 1 at a position corresponding to the confluence section 16. The distribution pipe 4 extends around the housing 1. A connecting pipe is provided on the outside of the distribution pipe 4. Multiple feed ports 15 are provided around the confluence section 16, and each of the multiple feed ports 15 is connected to the distribution pipe 4. The connecting pipe is used to connect to an external melting device, which feeds molten material into the distribution pipe 4 through the connecting pipe. The molten material then surrounds and fills the outside of the housing 1 and enters the confluence section 16 from the multiple feed ports 15 at different positions. This improves the efficiency of filling the multiple molding cavities 13, thereby ensuring that material can be replenished into the molding cavity 13 in a timely manner when the extrusion head 22 leaves the molding cavity 13.

[0029] When the pressing member 31 directly abuts against the top side of the rocking seat 2, the contact between the pressing member 31 and the rocking seat 2 is point contact, and the stability when applying force is low. Therefore, in order to improve the stability of the pressing member 31 abutting against the rocking seat 2, in this embodiment, a limiting groove 23 is provided around the center of the top side of the rocking seat 2, and the bottom surface of the pressing member 31 abuts against the limiting groove 23. The bottom surface of the pressing member 31 abuts against the inner side of the limiting groove 23, which can increase the contact area between the pressing member 31 and the rocking seat 2. When the pressing member 31 moves around the top side of the rocking seat 2, the bottom surface of the pressing member 31 enters the limiting groove 23, thereby improving the stability of the pressing member 31 applying force to the rocking seat 2.

[0030] As a further embodiment of the structure of the shell 1, the shell 1 includes a top cover 17, a main shell 18, and a bottom shell 19. The top cover 17 is connected to the top side of the main shell 18, and the bottom shell 19 is connected to the bottom side of the main shell 18. The top cover 17, the main shell 18, and the bottom shell 19 enclose the cavity 11. The limiting portion 12 is formed in the main shell 18, and the molding cavity 13 and the feed port 15 are arranged in the bottom shell 19. The top cover 17, the main shell 18, and the bottom shell 19 can be produced independently during production, which facilitates the formation of structures such as the limiting portion 12 supporting the rocking seat 2 in the main shell 18, and the formation of multiple molding cavities 13 and other structures on the bottom side of the bottom shell 19. Finally, the top cover 17, the main shell 18, and the bottom shell 19 are assembled into a whole. This can improve the efficiency of the production of the entire shell 1.

[0031] To facilitate maintenance of the housing 1, in this embodiment, the top cover 17 and the bottom shell 19 are each detachably connected to the main shell 18. For example, the top cover 17 is connected to the top side of the main shell 18 by screws, and flanges are provided at the bottom side of the main shell 18 and the top side of the bottom shell 19. The main shell 18 and the bottom shell 19 are connected to each other by abutting the two flanges and tightening them with screws. The top cover 17, the main shell 18, and the bottom shell 19 are detachable from each other. After long-term use, any component can be independently replaced and maintained as needed. During maintenance, the required position can be disassembled and assembled according to different situations. For example, when the rocking seat 2 needs to be maintained and replaced, the top cover 17 is removed; when the molding cavity 13 needs to be cleaned, the bottom cover is removed, thereby improving the flexibility and convenience of use.

[0032] The above specifically describes the preferred embodiments of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A granulator, characterized in that: include: A shell (1) is provided with a cavity (11) formed therein, a middle side wall of the cavity (11) protrudes toward the center of the cavity (11) to form a limiting portion (12), a molding cavity (13) is provided on the bottom side of the cavity (11), a plurality of molding cavities (13) are provided around the center of the cavity (11), a plurality of discharge ports (14) are respectively provided on the bottom sides of the plurality of molding cavities (13), and a feeding port (15) is provided on the outer side of the bottom of the cavity (11); A rocking seat (2), wherein an annular protrusion (21) is provided on the outer side of the middle portion, one side of the annular protrusion (21) abuts against one side of the limiting portion (12), and an extrusion head (22) is provided at the bottom side of the rocking seat (2) at positions corresponding to the plurality of molding cavities (13); A rotating device is connected to the top side of the shell (1), and the rotating device has a pressing piece (31) that can rotate around the center. The bottom side of the pressing piece (31) is an arc-shaped surface. The bottom side of the pressing piece (31) abuts against the top side of the rocking seat (2) and makes the rocking seat (2) tilted in the cavity (11). When the pressing piece (31) rotates, it can sequentially drive the multiple extrusion heads (22) to enter the multiple forming cavities (13) respectively.

2. A granulator according to claim 1, characterized in that: The rotating device comprises a motor (32) and a turntable (33), wherein the motor (32) is connected to the top side of the housing (1), and the turntable (33) is rotatably connected to the top side of the cavity (11). The output end of the motor (32) extends into the housing (1) and drives the turntable (33), and the top pressure member (31) is connected to the bottom side of the turntable (33).

3. A granulator according to claim 2, characterized in that: The bottom side of the turntable (33) is connected to a position away from the top pressure piece (31) with a limiting frame (34), one side of the limiting frame (34) is slidably connected to a position of the cavity (11) above the limiting portion (12), and the other side of the limiting frame (34) is provided with a universal wheel (35), and the rolling end of the universal wheel (35) abuts against a position of the rocking seat (2) above the annular protrusion (21).

4. A granulator according to claim 1, characterized in that: A side surface of the limiting portion (12) close to the annular protrusion (21) is a supporting surface (121), the cross-sectional shape of the supporting surface (121) is arc-shaped, the arc-shaped opening of the supporting surface (121) is inclined upward toward the center of the cavity (11), and the outer side surface of the annular protrusion (21) and the supporting surface (121) are adapted to each other.

5. A granulator according to claim 1, characterized in that: The distance between the pressing member (31) and the annular protrusion (21) is greater than the distance between the annular protrusion (21) and any one of the extrusion heads (22).

6. A granulator according to claim 1, characterized in that: A confluence section (16) is formed at the bottom of the cavity (11), the space of the confluence section (16) gradually shrinks from top to bottom, and the feed port (15) is arranged on the confluence section (16).

7. A granulator according to claim 6, characterized in that: A distribution pipe (4) is provided on the outside of the shell (1) at a position corresponding to the confluence section (16), and the distribution pipe (4) extends around the shell (1). A connecting pipe is provided on the outside of the distribution pipe (4), and a plurality of feed ports (15) are provided around the confluence section (16), and the plurality of feed ports (15) are respectively connected to the distribution pipe (4).

8. A granulator according to claim 1, characterized in that: A limiting groove (23) is provided on the top side of the rocking seat (2) around its center, and the bottom surface of the pressing member (31) abuts against the limiting groove (23).

9. A granulator according to claim 1, characterized in that: The housing (1) comprises a top cover (17), a main shell (18) and a bottom shell (19); the top cover (17) is connected to the top side of the main shell (18); the bottom shell (19) is connected to the bottom side of the main shell (18); the top cover (17), the main shell (18) and the bottom shell (19) are arranged to form the cavity (11); the limiting portion (12) is formed in the main shell (18); and the molding cavity (13) and the feed port (15) are arranged in the bottom shell (19).

10. A granulator according to claim 9, characterized in that: The top cover (17) and the bottom shell (19) are respectively detachably connected to the main shell (18).

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