CN110652935B

CN110652935B - Double-roller extrusion granulator capable of changing particle shape

Info

Publication number: CN110652935B
Application number: CN201910939802.1A
Authority: CN
Inventors: 顾年东; 卢闯
Original assignee: Wuxi Jinhua Yiyuan Technology Co ltd
Current assignee: Wuxi Jinhua Yiyuan Technology Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2022-04-01
Anticipated expiration: 2039-09-30
Also published as: CN110652935A

Abstract

The invention discloses a pair-roller extrusion granulator capable of changing particle shapes, which comprises a machine body, a discharge chute, a workbench, extrusion rollers and a controller, wherein a distance adjusting transmission mechanism is arranged at the top of the workbench, the two extrusion rollers are correspondingly arranged at the inner side of the distance adjusting transmission mechanism, the distance adjusting transmission mechanism comprises fixed seats, the two fixed seats are correspondingly arranged on the workbench, a chute is arranged in each fixed seat, a sliding table is connected in each sliding groove in a sliding manner, a distance adjusting motor is arranged at one side of each fixed seat, an output shaft of each motor is connected with a distance adjusting lead screw, the distance adjusting lead screws are matched with the sliding tables, a main motor is arranged on the machine body, a main transmission gear is sleeved outside an output shaft of the main motor, one extrusion roller is movably arranged between the two sliding tables through a bearing, the other extrusion roller is movably arranged between the two fixed seats through a bearing, the invention has the characteristics of good cleaning effect and strong practicability.

Description

Double-roller extrusion granulator capable of changing particle shape

Technical Field

The invention relates to the technical field of process automation, in particular to a pair-roller extrusion granulator capable of changing the shape of particles.

Background

Most polymers must be compounded, and then pelletized into a marketable feedstock before being formed into a final product. A pelletizer is a forming machine that can make materials into specific shapes. The double-roller extrusion is mainly used for powdery materials, and large materials are extruded and divided into small blocks by two mutually attached rollers.

After the existing granulator is used up, a large amount of materials are left in the grooves on the extrusion rollers, the left materials can affect the next used extrusion effect, the materials are generally removed by adopting a high-pressure water gun spraying or manual cleaning method, and the two methods are time-consuming, labor-consuming and incomplete in cleaning due to the small and large number of the grooves; meanwhile, the existing granulator can only extrude materials with circular or square shapes and the like, the extrusion roller needs to be replaced when the extrusion shape is changed, the cost is high, the replacement is troublesome, and the practicability is poor. Therefore, it is necessary to design a pair-roller extrusion granulator with good cleaning effect and strong practicability, and the shape of the granules can be changed.

Disclosure of Invention

The invention aims to provide a pair-roller extrusion granulator capable of changing the shape of particles so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: a pair-roller extrusion granulator capable of changing particle shapes comprises a machine body, a discharge chute, a workbench, extrusion rollers and a controller, wherein a distance adjusting transmission mechanism is arranged at the top of the workbench, the two extrusion rollers are correspondingly installed on the inner side of the distance adjusting transmission mechanism, the discharge chute is used for receiving materials sent out by the extrusion rollers, and the distance adjusting transmission mechanism is used for adjusting the axial center distance between the two extrusion rollers and is suitable for the extrusion rollers with different diameters.

Further, the roll adjustment transmission mechanism comprises a fixed seat, two fixed seats are correspondingly arranged on the workbench, a sliding groove is formed in the fixed seat, a sliding table is connected in the sliding groove, a roll adjustment motor is installed on one side of the fixed seat, an output shaft of the motor is connected with a roll adjustment lead screw, the roll adjustment lead screw is matched with the sliding table, a main motor is installed on the machine body, a main transmission gear is sleeved outside an output shaft of the main motor, one of the extrusion rollers is movably installed between the two sliding tables through a bearing, an auxiliary transmission gear is sleeved at one end of the extrusion roller, the other extrusion roller is movably installed between the two fixed seats through a bearing and is connected with the main motor through a coupling, two cleaning mechanisms are arranged outside the extrusion rollers, and when the distance between the two extrusion rollers needs to be adjusted, the roll adjustment motor is started, the roll adjustment lead screw rotates and drives the slip table and remove, separately two squeeze rolls make clean the mechanism and can not hit each other by free motion, conveniently clean, make two squeeze rolls laminate each other after cleaning, when the squeeze roll that adapts to different external diameters, it is the same to change the modulus, but the different auxiliary drive gear of size and main drive gear, make it can intermeshing, the during operation main motor directly drives a squeeze roll and rotates, drives another squeeze roll through main drive gear and rotates, both extrudees and the granulation.

Further, the cleaning mechanism comprises an annular seat and a sliding round platform, the annular seat is connected with the sliding round platform through a thrust bearing, a straight tooth surface is uniformly arranged on the outer peripheral surface of the annular seat, a platen is fixed on one side of the sliding round platform through welding, a first driving motor is arranged on the platen, a straight gear is movably mounted on the platen through a bearing frame, the straight gear is meshed with the straight tooth surface, the first driving motor is connected with the straight gear through belt transmission, one side of the sliding round platform is slidably connected with a guide rail, one guide rail is fixedly welded with the fixed seat, the other guide rail is fixedly welded with the sliding platform, one side of the sliding round platform is screwed with a translation lead screw, one translation lead screw is movably connected with the fixed seat through a bearing, and the other translation lead screw is movably connected with the sliding platform through a bearing, the one end and the translation motor of translation lead screw pass through the shaft coupling and are connected, the inner circle of annular seat evenly is provided with the brush cleaner, when beginning to clean, start translation motor, its output shaft drives the translation lead screw and rotates, changes the horizontal position of annular seat and the round platform that slides, starts first driving motor simultaneously, it passes through under spur gear and the meshing of straight-tooth surface, drives annular seat and the round platform that slides and rotates relatively for the relative rotary motion and the translation motion of each brush cleaner and squeeze roll get rid of remaining material on the squeeze roll, clean more three-dimensionally, use manpower sparingly.

Furthermore, a sliding sleeve ring is installed inside the annular seat, one side of the sliding sleeve ring is connected with a driving ring in a sliding manner, second tapered tooth surfaces are uniformly formed in the inner ring of the driving ring in the inclined direction, first tapered tooth surfaces are uniformly formed in one side of the driving ring in the inclined direction, a fixed shaft at one end of the cleaning brush penetrates through the inner ring of the annular seat and is connected with a first bevel gear, the first bevel gear is meshed with the second tapered tooth surfaces, a second driving motor is fixedly installed on one side of the annular seat, an output shaft of the second driving motor is connected with a second bevel gear, the second bevel gear is meshed with the first tapered tooth surfaces, when cleaning is started, the second driving motor is started, an output shaft of the second driving motor drives the driving ring to rotate through the meshing of the second bevel gear and the first tapered tooth surfaces, at the moment, the second tapered tooth surfaces on the inner ring rotate and drive the cleaning brush to rotate through the first bevel gear, the controller is preferably set to perform the translation and the large rotation of the annular seat in a segmented manner, while the small rotation of the cleaning brush is continuously performed, and the cleaning is focused at the one-to-one corresponding positions of the cleaning brush and the squeeze roll, so that the cleaning is more thorough.

Further, first extrusion groove has evenly been seted up to the outside of squeeze roll, the outside correspondence of squeeze roll is provided with the semicircle shell, two the semicircle shell passes through bolt reciprocal anchorage, the internal diameter of semicircle shell equals with the external diameter of squeeze roll, second extrusion groove has evenly been seted up to the outside of semicircle shell, the position one-to-one of second extrusion groove and first extrusion groove, the bottom of first extrusion groove inwards extends has the joint bulge, the joint bulge contacts with the inner wall of first extrusion groove, when the material shape that the change wants, changes the semicircle shell of the second extrusion groove shape that wants, and the semicircle on two squeeze rolls of during operation contacts, and the semicircle shape makes things convenient for the dismouting more, and the joint bulge is used for preventing squeeze roll and semicircle shell to break away from at the during operation.

Furthermore, the shape of the first extrusion groove and the second extrusion groove is one of circular shape, rectangular shape and oval shape, the shape of the clamping convex part is the same as that of the first extrusion groove, and the first extrusion groove and the second extrusion groove in various shapes are used for extruding materials with different shapes, so that circular, rectangular and oval material particles are formed.

Furthermore, the output shafts of the main motor, the distance adjusting motor, the first driving motor, the translation motor and the second driving motor are electrically connected with a controller, and the controller is preferably of an SPC-SFMC-XA model and is used for sequentially controlling the motors to work sequentially, and the rotating angle and the rotating speed to achieve a better cleaning effect.

Furthermore, the number of the cleaning brushes is the same as that of the first extrusion grooves on the same circumferential surface, the diameter of the cleaning brushes is smaller than that of the first extrusion grooves and that of the second extrusion grooves, the cleaning brushes can extend into the first extrusion grooves or the second extrusion grooves, and the cleaning grooves are rotated to clean the bottom of the grooves, so that the cleaning is comprehensive and free of dead angles.

Compared with the prior art, the invention has the following beneficial effects: in the invention, the raw materials are mixed,

(1) by arranging the cleaning mechanism, the cleaning brush and the annular seat rotate and translate around the extrusion roller at high speed, so that the high-precision cleaning can be performed on the surface of each groove and roller, the cleaning is performed automatically, manpower is not needed, the cleaning effect is good, and the influence of residual materials on the particle shape in the next use is avoided;

(2) the detachable semicircular casing is arranged on the extrusion roller, so that the extrusion shape can be changed only by replacing a proper semicircular casing or not installing the semicircular casing when the shape is changed, the replacement is simple, and the practicability is high;

(3) through being provided with roll adjustment drive mechanism, can change the distance between two rollers when clean squeeze roll or change the semicircle cover shell, conveniently clean, can adapt to the condition of plus semicircle cover shell or not adding the semicircle cover shell simultaneously, the adjustment is convenient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the sweeping mechanism of the present invention;

FIG. 3 is a schematic top view of the pitch drive mechanism of the present invention;

FIG. 4 is a front cross-sectional structural schematic view of the annular seat of the present invention;

FIG. 5 is a schematic view of the drive ring and slip collar installation of the present invention;

FIG. 6 is an exploded view of the squeeze roll and semi-circular housing of the present invention;

FIG. 7 is a schematic view of the installation of the cylindrical protrusion and the first extrusion groove of the present invention;

in the figure: 1. a body; 11. a discharge chute; 12. a work table; 2. a distance-adjusting transmission mechanism; 3. a cleaning mechanism; 4. a squeeze roll; 5. a controller; 21. a main motor; 211. a main drive gear; 22. a fixed seat; 221. a chute; 222. a sliding table; 223. a distance-adjusting motor; 2231. a distance adjusting lead screw; 224. a secondary drive gear; 31. an annular seat; 311. a straight tooth surface; 312. cleaning with a brush; 313. a drive ring; 3131. a first tapered tooth surface; 3132. a second tapered tooth surface; 314. a first bevel gear; 315. a slip collar; 32. a sliding round table; 321. a platen; 33. a spur gear; 34. a first drive motor; 35. a second drive motor; 351. a second bevel gear; 36. a translation motor; 361. translating the lead screw; 37. a guide rail; 41. a first extrusion groove; 42. a semicircular casing; 421. a second extrusion groove; 422. the convex part is clamped.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: a pair roller extrusion granulator capable of changing particle shapes comprises a granulator body 1, a discharge chute 11, a workbench 12, extrusion rollers 4 and a controller 5, wherein a distance adjusting transmission mechanism 2 is arranged at the top of the workbench 12, the two extrusion rollers 4 are correspondingly arranged on the inner side of the distance adjusting transmission mechanism 2, the discharge chute 11 is used for receiving materials sent out by the extrusion rollers 4, and the distance adjusting transmission mechanism 2 is used for adjusting the axial center distance between the two extrusion rollers 4 and is suitable for the extrusion rollers 4 with different diameters;

as shown in fig. 1 and fig. 3, the distance-adjusting transmission mechanism 2 includes a fixed seat 22, two fixed seats 22 are correspondingly disposed on the working table 12, a sliding groove 221 is disposed inside the fixed seat 22, the sliding groove 221 is slidably connected with a sliding table 222 inside the sliding groove 221, a distance-adjusting motor 223 is mounted on one side of the fixed seat 22, an output shaft of the motor 223 is connected with a distance-adjusting screw 2231, the distance-adjusting screw 2231 is matched with the sliding table 222, a main motor 21 is mounted on the machine body 1, a main transmission gear 211 is sleeved outside an output shaft of the main motor 21, one of the two extrusion rolls 4 is movably mounted between the two sliding tables 222 through a bearing, a sub transmission gear 224 is sleeved at one end of the two extrusion rolls 4, the other extrusion roll 4 is movably mounted between the two fixed seats 22 through a bearing and is connected with the main motor 21 through a coupler, a cleaning mechanism 3 is disposed outside each of the two extrusion rolls 4, when the distance between the two extrusion rolls 4 needs to be adjusted, starting the distance adjusting motor 223, the distance adjusting lead screw 2231 rotates and drives the sliding table 222 to move, the two extrusion rollers 4 are separated to enable the cleaning mechanism 3 to move freely without colliding with each other, cleaning is convenient, the two extrusion rollers 4 are attached to each other after cleaning is finished, when the cleaning mechanism is suitable for the extrusion rollers 4 with different outer diameters, the auxiliary transmission gear 224 and the main transmission gear 211 which have the same modulus but different sizes are replaced to enable the two extrusion rollers to be meshed with each other, the main motor 21 directly drives one extrusion roller 4 to rotate during working, the other extrusion roller 4 is driven to rotate through the main transmission gear 211, and the two extrusion rollers extrude and granulate;

as shown in fig. 1-4, the cleaning mechanism 3 includes an annular base 31 and a sliding circular table 32, the annular base 31 is connected with the sliding circular table 32 through a thrust bearing, a straight tooth surface 311 is uniformly formed on the outer peripheral surface of the annular base 31, a platen 321 is fixed on one side of the sliding circular table 32 through welding, a first driving motor 34 is arranged on the platen 321, a straight tooth gear 33 is movably installed on the platen 321 through a bearing bracket, the straight tooth gear 33 is engaged with the straight tooth surface 311, the first driving motor 34 is connected with the straight tooth gear 33 through belt transmission, a guide rail 37 is slidably connected with one side of the sliding circular table 32, one guide rail 37 is fixed with a fixed base 22 through welding, the other guide rail 37 is fixed with the sliding table 222 through welding, a translation lead screw 361 is screwed on one side of the sliding circular table 32, one translation lead screw 361 is movably connected with the fixed base 22 through a bearing, the other translation lead screw 361 is movably connected with the sliding table 222 through a bearing, one end of a translation screw 361 is connected with a translation motor 36 through a coupler, the inner ring of the annular seat 31 is uniformly provided with cleaning brushes 312, when cleaning is started, the translation motor 36 is started, an output shaft of the translation motor drives the translation screw 361 to rotate, the horizontal positions of the annular seat 31 and the sliding circular table 32 are changed, meanwhile, a first driving motor 34 is started, and the annular seat 31 and the sliding circular table 32 are driven to rotate relatively under the meshing of a straight gear 33 and a straight gear surface 311, so that the relative rotation movement and the translation movement of each cleaning brush 312 and the extrusion roller 4 are realized, the residual materials on the extrusion roller 4 are removed, the cleaning is more three-dimensional, and the labor is saved;

as shown in fig. 4-6, a sliding collar 315 is installed inside the annular seat 31, one side of the sliding collar 315 is slidably connected with a driving ring 313, the inner ring of the driving ring 313 is obliquely and uniformly provided with second tapered tooth surfaces 3132, one side of the driving ring 313 is obliquely and uniformly provided with first tapered tooth surfaces 3131, one end fixing shaft of the cleaning brush 312 passes through the inner ring of the annular seat 31 and is connected with a first bevel gear 314, the first bevel gear 314 is meshed with the second tapered tooth surfaces 3132, one side of the annular seat 31 is fixedly provided with a second driving motor 35, an output shaft of the second driving motor 35 is connected with a second tapered gear 351, the second tapered gear 351 is meshed with the first tapered tooth surfaces 3131, when cleaning is started, the second driving motor 35 is started, the output shaft thereof drives the driving ring 313 to rotate through the meshing of the second tapered gear 351 and the first tapered tooth surfaces 3131, at this time, the second tapered tooth surfaces 3132 on the inner ring thereof rotate, the first bevel gear 314 drives the cleaning brush 312 to rotate, the controller 5 is preferably set to perform translation and large rotation of the annular seat 31 in a segmented manner, while small rotation of the cleaning brush 312 is performed continuously, and the cleaning is focused at the one-to-one corresponding positions of the cleaning brush 312 and the squeezing rollers 4, so that the cleaning is more thorough;

as shown in fig. 6 and 7, first extrusion grooves 41 are uniformly formed in the outer portion of each extrusion roll 4, semicircular sleeves 42 are correspondingly arranged in the outer portion of each extrusion roll 4, the two semicircular sleeves 42 are fixed to each other through bolts, the inner diameter of each semicircular sleeve 42 is equal to the outer diameter of each extrusion roll 4, second extrusion grooves 421 are uniformly formed in the outer portion of each semicircular sleeve 42, the positions of the second extrusion grooves 421 and the positions of the first extrusion grooves 41 correspond to each other one by one, clamping protrusions 422 extend inwards from the bottom of each first extrusion groove 41, the clamping protrusions 422 are in contact with the inner walls of the first extrusion grooves 41, when the shape of a desired material is changed, the semicircular sleeves 42 in the shape of the desired second extrusion grooves 421 are replaced, when the desired material is changed, the semicircular sleeves 42 on the two extrusion rolls 4 are in contact with each other during operation, the semicircular shape is more convenient to disassemble and assemble, and disassemble, and the clamping protrusions 422 are used for preventing the extrusion rolls 4 from being separated from the semicircular sleeves 42;

as shown in fig. 6 and 7, the first pressing groove 41 and the second pressing groove 421 have one of a circular shape, a rectangular shape and an oval shape, the shape of the snap-in protrusion 422 is the same as that of the first pressing groove 41, and the first pressing groove 41 and the second pressing groove 421 having various shapes are used for pressing the material to form an unnecessary shape, thereby forming material particles having a circular shape, a rectangular shape and an oval shape;

referring to fig. 1-4, the output shafts of the main motor 21, the pitch motor 223, the first driving motor 34, the translation motor 36 and the second driving motor 35 are all electrically connected to the controller 5, and the controller 5 is preferably in the SPC-SFMC-X2214A type, which is used for sequentially controlling the sequential operation of the motors, and the rotation angle and speed, so as to achieve better cleaning effect;

as shown in fig. 4 and 6, the number of the cleaning brushes 312 is the same as that of the first extrusion grooves 41 on the same circumferential surface, the diameter of the cleaning brushes 312 is smaller than that of the first extrusion grooves 41 and that of the second extrusion grooves 421, and the cleaning brushes 312 can extend into the first extrusion grooves 41 or the second extrusion grooves 421 to clean the entire surface without dead corners by rotating the bottom of the cleaning grooves.

The working principle is as follows: when the granulator is used, the discharge chute 11 is used for receiving materials sent by the squeeze rollers 4, and the distance adjusting transmission mechanism 2 is used for adjusting the axial distance between the two squeeze rollers 4 and is suitable for the squeeze rollers 4 with different diameters; when the distance between two extrusion rollers 4 needs to be adjusted, a distance adjusting motor 223 is started, a distance adjusting screw 2231 rotates and drives a sliding table 222 to move, the two extrusion rollers 4 are separated so that a cleaning mechanism 3 can move freely and cannot collide with each other, cleaning is convenient, the two extrusion rollers 4 are attached to each other after cleaning is finished, when the device is suitable for the extrusion rollers 4 with different outer diameters, an auxiliary transmission gear 224 and a main transmission gear 211 which have the same modulus and different sizes are replaced and can be meshed with each other, when the device works, a main motor 21 directly drives one extrusion roller 4 to rotate, the other extrusion roller 4 is driven to rotate through the main transmission gear 211, and the two extrusion rollers extrude and granulate; when cleaning is started, the translation motor 36 is started, an output shaft of the translation motor drives the translation screw 361 to rotate, the horizontal positions of the annular seat 31 and the sliding circular table 32 are changed, meanwhile, the first driving motor 34 is started, and the annular seat 31 and the sliding circular table 32 are driven to rotate relatively under the meshing of the straight gear 33 and the straight gear surface 311, so that the cleaning brushes 312 and the extrusion rollers 4 rotate relatively and move translationally, residual materials on the extrusion rollers 4 are removed, the cleaning is more three-dimensional, and manpower is saved; when cleaning is started, the second driving motor 35 is started, the driving ring 313 is driven to rotate by the output shaft of the second driving motor through the engagement of the second bevel gear 351 and the first bevel gear 3131, the second bevel gear 3132 on the inner ring rotates at the same time, the cleaning brush 312 is driven to rotate by the first bevel gear 314, the controller 5 is preferably set to perform translation and large rotation of the annular seat 31 in a segmented manner, while small rotation of the cleaning brush 312 is continuously performed, and cleaning is emphasized at the one-to-one corresponding position of the cleaning brush 312 and the squeezing roller 4, so that cleaning is more thorough; when the shape of the material is changed, the semicircular sleeves 42 in the shape of the second extrusion groove 421 are changed, the semicircular sleeves 42 on the two extrusion rollers 4 are contacted during working, the semicircular shape is more convenient to assemble and disassemble, and the clamping convex part 422 is used for preventing the extrusion rollers 4 from being separated from the semicircular sleeves 42 during working; the first pressing groove 41 and the second pressing groove 421 of various shapes are used for pressing and forming materials of different shapes, so that material particles of round, rectangular and oval shapes are formed; the controller 5 is preferably of SPC-SFMC-X2214A type, and is used for sequentially controlling the sequential work of all motors and the rotating angle and rotating speed to better achieve the cleaning effect; the cleaning brush 312 can extend into the first extrusion groove 41 or the second extrusion groove 421, and the bottom of the groove is cleaned by rotating, so that the whole surface is cleaned without falling dead corners.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a can change pair roller extrusion granulator of particle shape, includes fuselage (1), blown down tank (11), workstation (12), squeeze roll (4) and controller (5), its characterized in that: the top of workstation (12) is provided with roll adjustment drive mechanism (2), two squeeze roll (4) are corresponding to be installed in the inboard of roll adjustment drive mechanism (2), roll adjustment drive mechanism (2) includes fixing base (22), two fixing base (22) are corresponding to be set up on workstation (12), spout (221) have been seted up to the inside of fixing base (22), the inside sliding connection of spout (221) has slip table (222), roll adjustment motor (223) are installed to one side of fixing base (22), the output shaft of motor (223) has roll adjustment lead screw (2231), roll adjustment lead screw (2231) cooperatees with slip table (222), main motor (21) is installed in fuselage (1), the output shaft of main motor (21) has cup jointed main drive gear (211), one of them squeeze roll (4) are through bearing movable mounting between two slip tables (222), one end of the extrusion roller is sleeved with an auxiliary transmission gear (224), the other extrusion roller (4) is movably arranged between two fixed seats (22) through a bearing and is connected with a main motor (21) through a coupler, the outer parts of the two extrusion rollers (4) are respectively provided with a cleaning mechanism (3), the cleaning mechanism (3) comprises an annular seat (31) and a sliding circular table (32), the annular seat (31) is connected with the sliding circular table (32) through a thrust bearing, the outer peripheral surface of the annular seat (31) is uniformly provided with a straight tooth surface (311), one side of the sliding circular table (32) is fixedly provided with a bedplate (321) through welding, the bedplate (321) is provided with a first driving motor (34), the bedplate (321) is movably provided with a straight tooth gear (33) through a bearing frame, the straight tooth gear (33) is meshed with the straight tooth surface (311), and the first driving motor (34) is connected with the straight tooth gear (33) through belt transmission, one side sliding connection of platform (32) that slides has guide rail (37), one of them guide rail (37) and fixing base (22) pass through welded fastening, another guide rail (37) and slip table (222) pass through welded fastening, one side spiro union of platform (32) that slides has translation lead screw (361), one of them translation lead screw (361) passes through bearing swing joint with fixing base (22), another translation lead screw (361) and slip table (222) pass through bearing swing joint, the one end and the translation motor (36) of translation lead screw (361) are connected through the shaft coupling, the inner circle of annular seat (31) all evenly is provided with cleaning brush (312), the internally mounted of annular seat (31) has slip lantern ring (315), one side sliding connection of slip lantern ring (315) has drive ring (313), second cone flank (3132) have evenly been seted up to the inner circle slant of drive ring (313), one side of the driving ring (313) is obliquely and upwards uniformly provided with a first tapered tooth surface (3131), one end fixing shaft of the cleaning brush (312) penetrates through an inner ring of the annular seat (31) and is connected with a first bevel gear (314), the first bevel gear (314) is meshed with a second tapered tooth surface (3132), one side of the annular seat (31) is fixedly provided with a second driving motor (35), an output shaft of the second driving motor (35) is connected with a second bevel gear (351), the second bevel gear (351) is meshed with the first tapered tooth surface (3131), the outer part of the extrusion roller (4) is uniformly provided with a first extrusion groove (41), the outer part of the extrusion roller (4) is correspondingly provided with a semicircular sleeve (42), the two semicircular sleeve (42) are mutually fixed through bolts, and the inner diameter of the semicircular sleeve (42) is equal to the outer diameter of the extrusion roller (4), a second extrusion groove (421) is uniformly formed in the outer part of the semicircular casing (42), and the first position of the second extrusion groove (421) and the first position of the first extrusion groove (41)

Correspondingly, the bottom of the first extrusion groove (41) extends inwards to form a clamping protrusion (422), and the clamping protrusion (422) is in contact with the inner wall of the first extrusion groove (41).

2. A twin-roll extrusion granulator capable of changing the shape of particles as claimed in claim 1, wherein: the shape of the first extrusion groove (41) and the second extrusion groove (421) is one of circular, rectangular and oval, and the shape of the clamping convex part (422) is the same as that of the first extrusion groove (41).

3. A twin-roll extrusion granulator capable of changing the shape of particles as claimed in claim 1, wherein: the output shafts of the main motor (21), the distance adjusting motor (223), the first driving motor (34), the translation motor (36) and the second driving motor (35) are electrically connected with the controller (5).

4. A twin-roll extrusion granulator capable of changing the shape of particles as claimed in claim 1, wherein: the number of the cleaning brushes (312) is the same as that of the first extrusion grooves (41) on the same circumferential surface, and the diameter of the cleaning brushes (312) is smaller than that of the first extrusion grooves (41) and the second extrusion grooves (421).