A color master batch cutting system

Abstract

The present application relates to the technical field of processing machinery, in particular to a color master batch cutting system, which comprises a transmission device, a rotating shaft, a plasticizing device, a cutter head and a protection device; further comprising a driving module and a cutter; a rectangular hole is formed in the outer wall of the cutter head and close to one end of the plasticizing device; the cutter is slidably connected in the rectangular hole; a cavity is formed in the cutter head; the rectangular hole is in communication with the cavity in the cutter head; a cylindrical cavity is formed in the rotating shaft; the cylindrical cavity is in communication with the cavity in the cutter head; the driving module is located at one end of the rotating shaft; the driving module can fix the cutter when working; the cavity formed in the cutter head cooperates with the driving module, so as to simplify the steps of replacing the cutter and fixing the cutter, thereby making the replacement of the cutter more convenient, and indirectly improving the production efficiency of the color master batch production line.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of processing machinery, in particular to a color master batch cutting system. BACKGROUND

[0002] Color master batch is a plastic colorant prepared by dispersing a high proportion of pigment or additive and thermoplastic resin. The selected resin has good wetting and dispersing effect on the colorant and good compatibility with the colored material. It is widely used in polyethylene, polypropylene, polystyrene, ABS, nylon, PC, PMMA, PET and other resins, and can produce colorful fibers, clothing, daily plastics, wires and cables, household appliances, agricultural films, automobile parts, health care equipment and other products. In the process of producing color master batch, the final cutting process of color master batch is needed to complete the preparation of color master batch. However, during the cutting process, the cutting knife in the cutting system often wears excessively or is damaged. At this time, the cutting knife needs to be replaced. However, since the cutting knife is fixed on the knife holder by bolts, and the knife holder also needs to be installed on the cutter disc, the process of replacing the cutting knife is very tedious and inconvenient, which seriously affects the efficiency of color master batch production. Moreover, during the replacement process of the cutting knife, the worker needs to replace the cutting knife manually. If the operation is wrong and the cutting knife is working, it will pose a threat to the safety of the worker, and the replacement process of the cutting knife will be dangerous.

[0003] A color master batch cutting machine is disclosed in a Chinese patent with publication number CN110293593B. The existing color master batch cutting device is optimized to make the overall structure more reasonable and ingenious, and it is very convenient to use. It can simultaneously realize material feeding and removal. The device performs extrusion and centrifugal operation on color master batch, which makes the cutting of color master batch protection device more complete, improves the efficiency of the device and the color master batch cutting effect, and has high use and promotion value. However, the technical solution still does not solve the problem of replacing the cutting knife in the cutting system, which is very tedious and inconvenient, and the process of replacing the cutting knife is dangerous, which limits the application of the solution.

[0004] In view of the above problems, the present application provides a color master batch cutting system to solve the above technical problems. SUMMARY

[0005] In order to make up for the deficiencies of the prior art, the color master batch cutting system provided by the present application, the driving module is matched with the pushing unit by being provided with a cavity in the cutter head, thereby simplifying the fixing of the cutting knife in the step of replacing the cutting knife, making the replacement of the cutting knife more convenient, and thereby improving the production efficiency of the color master batch production line.

[0006] The technical scheme adopted by the present application to solve its technical problems is: the color master batch cutting system comprises a transmission device, a rotating shaft, a shaping device, a cutter head and a protection device, further comprises a driving module and a cutting knife, a rectangular hole is formed in the outer wall of the cutter head and close to one end of the shaping device, the rotating shaft is fixedly connected with the cutter head,

[0007] a cavity is formed in the cutter head, the rectangular hole is in communication with the cavity in the cutter head, the cutting knife is slidably connected in the rectangular hole, a cylindrical cavity is formed in the rotating shaft, the cylindrical cavity is in communication with the cavity in the cutter head, the driving module is located at one end of the rotating shaft, and the driving module can fix the cutting knife when working.

[0008] Preferably, the driving module comprises two hydraulic pumps, an annular block and a pushing unit, the annular block is rotatably and sealingly connected on the rotating shaft, a through hole is formed in the outer wall of the rotating shaft, the through hole is in communication with the cylindrical cavity, an annular groove is formed in the annular block, and the annular groove is in communication with the through hole,

[0009] the output ends of the two hydraulic pumps are fixedly connected on the annular block, through grooves are formed in the annular block and correspond to the positions where the output ends of the hydraulic pumps are fixedly connected, the through grooves are in communication with the annular groove, the pushing unit is located in the cavity in the cutter head, hydraulic oil is arranged between the cylindrical cavity and the pushing unit and the inner wall of the cavity away from the shaping device, and the two hydraulic pumps can control the movement of the pushing unit through the hydraulic oil.

[0010] Preferably, the pushing unit comprises a push plate, the push plate is slidably and sealingly connected in the cavity of the cutter head, a guide block is arranged on the inner wall of the cavity, a guide groove is formed in the push plate, and a guide block is slidably and sealingly connected in the guide groove, and the two hydraulic pumps can control the movement of the push plate through the hydraulic oil.

[0011] Preferably, limit blocks are arranged on the push plate and correspond to the two sides of the cutting knife, and the limit blocks can limit the cutting knife.

[0012] Preferably, a rectangular groove is formed in the limit block, a spring is fixedly connected to the inner wall of the cavity and faces the shaping device, the other end of the spring is fixedly connected with a rectangular block, and the rectangular block is slidably connected with the rectangular groove.

[0013] Preferably, the cavity of the cutter head is provided with a protrusion on an inner wall of the shaping device; and a first recess is formed on the push plate at a position corresponding to the protrusion.

[0014] Preferably, the cutter comprises a blade and a square block; the blade is fixedly connected with the square block; and the two opposite sides of the square block facing an end of the cavity in the cutter head are inclined surfaces.

[0015] Preferably, a clamping block is fixedly connected on the push plate between adjacent limiting blocks; a clamping groove is formed on the square block; and when the push plate fixes the square block, the clamping block can be inserted into the clamping groove.

[0016] Preferably, at least two clamping grooves are formed on the square block.

[0017] Preferably, a rubber pad is fixedly connected on a surface of the push plate in contact with the cutter; and the friction between the rubber pad and the cutter is sufficient to limit and fix the cutter.

[0018] Preferably, an arc-shaped hole is formed on the protection device; an arc-shaped plate is slidably connected in the arc-shaped hole and is made of transparent material.

[0019] Preferably, a second recess is formed on an inner wall of the cavity in the cutter head facing the shaping device; the second recess corresponds to the square block on the push plate in sliding connection with the limiting block; the square block can enter the second recess under the driving of the push plate; and the contact surface between the square block and the second recess is an inclined surface.

[0020] The present application has the following advantages:

[0021] 1. In the present application, the driving module is matched with the pushing unit by being provided with a cavity in the cutter head, so that the fixing of the cutter in the step of replacing the cutter is simplified; meanwhile, the cutter is fixedly connected with the square block, which further facilitates the installation of the cutter on the cutter head; and the transparent arc-shaped plate on the protection device can be used to replace the cutter with external tools, so that the replacement of the cutter is more convenient, the safety during replacement of the cutter is improved, and the production efficiency of the color master batch production line is improved.

[0022] 2. In the present application, the limiting blocks are arranged on the push plate at positions corresponding to the two sides of the cutter, so that the limiting blocks limit the two sides of the cutter and increase the friction between the limiting blocks and the cutter, thereby preventing the cutter from moving up and down when the cutter is rotated by the cutter head, ensuring the position of the cutter in the rectangular hole, and stabilizing the working state of the cutter during work.

[0023] 3. The cutter head in the application is provided with a protrusion on an inner wall of a cavity towards a shaping device, the protrusion can support the cutter, prevent the cutter from falling into the cavity of the cutter head after being put into the rectangular hole, and cooperate with the first recess to prevent the protrusion from blocking the movement of the push plate, so that the position of the cutter on the cutter head is further limited and fixed, and the determination of the position of the cutter during installation and replacement is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0024] The application will be further described below with reference to the drawings.

[0025] Figure 1 is a perspective view of the pellet cutting system of the application;

[0026] Figure 2 is a structure diagram of the push plate in the cavity of the cutter head of the application;

[0027] Figure 3 is a perspective view of the protrusion and the second recess in the cavity of the cutter head of the application;

[0028] Figure 4 is a connection structure diagram of the rotating shaft and the annular block of the application;

[0029] Figure 5 is a connection diagram of the limiting block, the spring and the square block of the application;

[0030] Figure 6 is a plane diagram of the recess on the square block of the application;

[0031] Figure 7 is a production efficiency diagram of the two production lines when replacing the cutter of the application;

[0032] In the figure: 1, transmission device; 2, rotating shaft; 3, shaping device; 4, cutter head; 5, protection device; 6, rectangular hole; 7, cavity; 8, cylindrical cavity; 9, driving module; 91, hydraulic pump; 92, annular block; 93, through hole; 94, annular groove; 95, pushing unit; 951, push plate; 10, cutter; 101, blade; 102, square block; 11, limiting block; 12, rectangular groove; 13, spring; 14, rectangular block; 15, protrusion; 16, first recess; 17, rubber pad; 18, arc hole; 19, arc plate; 20, second recess; 21, guide block; 22, guide groove; 23, clamping block; 24, clamping groove. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, purposes and effects of the application easy to understand, the application will be further described below in combination with specific embodiments.

[0034] For example, Figures 1 to 6As shown, the color master batch cutting system comprises a transmission device 1, a rotating shaft 2, a shaping device 3, a cutter head 4 and a protection device 5; further comprising a driving module 9 and a cutter 10; the outer wall of the cutter head 4 is provided with a rectangular hole 6 close to one end of the shaping device 3; the rotating shaft 2 is fixedly connected with the cutter head 4;

[0035] The cavity 7 is formed in the cutter head 4; the rectangular hole 6 is in communication with the cavity 7 in the cutter head 4; the cutter 10 is slidably connected in the rectangular hole 6; the cylindrical cavity 8 is formed in the rotating shaft 2; the cylindrical cavity 8 is in communication with the cavity 7 in the cutter head 4; the driving module 9 is located at one end of the rotating shaft 2; the driving module 9 can fix the cutter 10 when working;

[0036] When working, the process of replacing the cutter 10 in the color master batch cutting system is very cumbersome and not convenient, which seriously affects the working efficiency of the color master batch production line;

[0037] Therefore, when the staff replaces the cutter 10 in the color master batch cutting system, first, the transmission device 1 stops running, so that the rotating shaft 2 and the cutter head 4 stop rotating, then the driving module 9 releases the fixation of the cutter 10 to be replaced on the cutter head 4, then pulls out the cutter 10 to be replaced from the rectangular hole 6 on the cutter head 4, then puts the new cutter 10 into the cutter head 4 from the rectangular hole 6 on the cutter head 4, then the driving module 9 moves towards the cavity 7 in the cutter head 4 to fix the replaced cutter 10, so as to complete the replacement of the cutter 10;

[0038] The cavity 7 in the cutter head 4 cooperates with the driving module 9 to make the replacement of the cutter 10 convenient and simplify the steps of fixing the cutter 10, so that the replacement of the cutter 10 is more convenient, and the production efficiency of the color master batch production line is indirectly improved.

[0039] As an embodiment of the present application, the driving module 9 comprises two hydraulic pumps 91, an annular block 92 and a pushing unit 95; the annular block 92 is rotatably and sealingly connected to the rotating shaft 2; the rotating shaft 2 is provided with a through hole 93; the through hole 93 is in communication with the cylindrical cavity 8; the annular block 92 is provided with an annular groove 94 in the inside; the annular groove 94 is in communication with the through hole 93;

[0040] The output ends of the two hydraulic pumps 91 are fixed on the annular block 92, and the annular block 92 is provided with a through groove at a position corresponding to the fixed position of the output end of the hydraulic pump 91; the through groove is communicated with the annular groove 94; the pushing unit 95 is located in the cavity 7 inside the cutter head 4; the cylindrical cavity 8 and the inner wall of the cavity 7 away from the shaping device 3 are both provided with hydraulic oil; the two hydraulic pumps 91 can control the movement of the pushing unit 95 through the hydraulic oil; during operation, one of the hydraulic pumps 91 of the driving module 9 controls the hydraulic oil to enter the cylindrical cavity 8 through the cooperation of the through groove and the annular groove 94, and then the hydraulic oil enters the cavity 7 of the cutter head 4 from the cylindrical cavity 8, and then the hydraulic oil can push the pushing unit 95 in the cavity 7 of the cutter head 4 to move, and finally the pushing unit 95 cooperates with the inner wall of the cavity 7 close to the shaping device 3 to fix the cutter 10; when it is needed to release the fixing of the cutter 10 by the pushing unit 95, the other hydraulic pump 91 cooperates with the through groove and the annular groove 94 to extract the hydraulic oil in the cylindrical cavity 8 and the cavity 7, so as to drive the push plate 951 to move towards the rotating shaft 2, thereby releasing the fixing of the cutter 10.

[0041] As an embodiment of the present application, the pushing unit 95 comprises a push plate 951; the push plate 951 is slidingly and sealingly connected in the cavity 7 of the cutter head 4; the inner wall of the cavity 7 is provided with a guide block 21; the push plate 951 is provided with a guide groove 22; the guide groove 22 is slidingly and sealingly connected with the guide block 21; the two hydraulic pumps 91 can control the movement of the push plate 951 through the hydraulic oil; during operation, the push plate 951 is slidingly and sealingly connected in the cavity 7 of the cutter head 4, so that the hydraulic oil can prevent leakage when the push plate 951 pushes the cutter 10 to be fixed, so that the hydraulic oil can better push the push plate 951, and because the push plate 951 is provided with the guide groove 22 and the guide groove 22 is slidingly and sealingly connected with the guide block 21, when the cutter head 4 is driven to rotate by the rotating shaft 2, the push plate 951 is not affected by the rotation of the cutter head 4 due to the cooperation of the guide groove 22 and the guide block 21, so as to ensure the stability of the push plate 951 during operation, thereby improving the stability of the push plate 951 to the cutter 10, so as to better fix the cutter 10.

[0042] As one of the embodiments of the present application, the two sides of the push plate 951 corresponding to the cutter 10 are provided with limiting blocks 11; the limiting blocks 11 can limit the cutter 10; during work, after the cutter 10 is fixed by the push plate 951, because the limiting blocks 11 are arranged on the two sides of the push plate 951 corresponding to the cutter 10, the cutter 10 can be fixed by the push plate 951 and the inner wall of the cavity 7, and the two sides of the cutter 10 can be limited by the limiting blocks 11, so that the friction between the push plate 951 and the cutter 10 is increased, the cutter 10 is prevented from moving up and down when the cutter 10 is rotated by the cutter head 4, the position of the cutter 10 in the rectangular hole 6 is ensured, and the working state of the cutter 10 during work is stabilized.

[0043] As one of the embodiments of the present application, the limiting block 11 is provided with a rectangular groove 12; the inner wall of the shaping device 3 is fixedly connected with a spring 13 towards the rectangular groove 12; the other end of the spring 13 is fixedly connected with a rectangular block 14; the rectangular block 14 is in sliding connection with the rectangular groove 12; during work, because the limiting block 11 is provided with the rectangular groove 12 and the spring 13 is fixedly connected in the rectangular groove 12, and the other end of the spring 13 is fixedly connected with the rectangular block 14, when the push plate 951 moves towards the transmission device 1 controlled by the hydraulic pump 91, the limiting block 11 can still fix the two sides of the cutter 10 through cooperation of the spring 13 and the rectangular block 14, so that the cutter 10 is prevented from being deviated in position after being placed in the rectangular hole 6 during installation and replacement of the cutter 10, the limiting block 11 can continuously limit and fix the cutter 10, and the cutter 10 will not be deviated in position.

[0044] As one of the embodiments of the present application, the inner wall of the cavity 7 of the cutter head 4 towards the shaping device 3 is provided with a protrusion 15; a first recess 16 is arranged on the push plate 951 corresponding to the protrusion 15; during work, because the inner wall of the cavity 7 of the cutter head 4 towards the shaping device 3 is provided with the protrusion 15, the protrusion 15 can support the cutter 10 when the cutter 10 is placed in the rectangular hole 6, so that the cutter 10 is prevented from falling into the cavity 7 of the cutter head 4 after being placed in the rectangular hole 6, and the first recess 16 is arranged on the push plate 951 corresponding to the protrusion 15, so that the protrusion 15 can enter the first recess 16 on the push plate 951 when the push plate 951 limits the cutter 10, the fixing effect of the push plate 951 on the cutter 10 is not affected, the position of the cutter 10 on the cutter head 4 is further limited and fixed, and the determination of the placement position of the cutter 10 during installation and replacement of the cutter 10 is facilitated.

[0045] As one of the embodiments of the present application, the cutter 10 comprises a blade 101 and a square block 102; the blade 101 is fixedly connected with the square block 102; opposite sides of one end of the square block 102 facing the cavity 7 in the cutter head 4 are bevels; in operation, since the blade 101 is fixedly connected with the square block 102, the square block 102 can be directly placed into the rectangular hole 6, and the square block 102 can be further limited by the rectangular hole 6, and the square block 102 can make the limiting effect of the limiting block 11 and the convex block 15 more obvious, and the opposite sides of one end of the square block 102 facing the cavity 7 in the cutter head 4 are bevels, so that the square block 102 can be better put into the rectangular hole 6, thereby saving the time for placing the cutter 10 into the rectangular hole 6.

[0046] As one of the embodiments of the present application, the push plate 951 is fixedly connected with a clamping block 23 between adjacent limiting blocks 11; the square block 102 is provided with a clamping groove 24; when the push plate 951 fixes the square block 102, the clamping block 23 can be inserted into the clamping groove 24; in operation, when the rotating shaft 2 indirectly drives the square block 102 on the cutter head 4 to rotate through the cooperation of the clamping block 23 fixedly connected with the push plate 951 and the clamping groove 24 on the square block 102, the square block 102 can resist the centrifugal force in the rotating process, so that the stability of the square block 102 in operation is enhanced, thereby ensuring the overall working effect of the cutter 10.

[0047] As one of the embodiments of the present application, the square block 102 is provided with at least two clamping grooves 24; in operation, by providing at least two clamping grooves 24 on the square block 102, the position of the square block 102 in the rectangular hole 6 can be adjusted, so that the distance of the overall cutter 10 placed into the rectangular hole 6 can be adjusted, thereby improving the applicability of the overall cutter 10, and further improving the pelletizing effect and range of the cutter 10 on the mother granular strip shaped by the shaping device 3.

[0048] As one of the embodiments of the present application, the surface of the push plate 951 in contact with the cutter 10 is fixedly connected with a rubber pad 17; the friction between the rubber pad 17 and the cutter 10 is sufficient to limit and fix the cutter 10; in operation, the rubber pad 17 fixedly connected with the surface of the push plate 951 in contact with the cutter 10 can protect the cutter 10 when the push plate 951 fixes the cutter 10, so as to prevent the push plate 951 from moving too far in the direction of the cutter 10 and causing damage to the cutter 10, thereby protecting the cutter 10, and the friction between the rubber pad 17 and the cutter 10 is sufficient to limit and fix the cutter 10, so that the rubber pad 17 does not affect the fixing and limiting effect of the push plate 951 on the cutter 10.

[0049] As one embodiment of the present application, the protection device 5 is provided with an arc-shaped hole 18; the arc-shaped hole 18 is slidably connected with an arc-shaped plate 19 which is made of transparent material; during operation, the arc-shaped hole 18 is provided on the protection device 5, and the arc-shaped plate 19 is slidably connected in the hole, so that when the cutter 10 is replaced, the arc-shaped plate 19 is pulled open, and then the cutter 10 can be put into the rectangular hole 6 by the staff with the help of external tools, thereby reducing the risk to the staff during the replacement of the cutter 10, and the arc-shaped plate 19 is made of transparent material, so that the staff can observe the cutting effect of the cutter 10 through the arc-shaped plate 19, thereby better discovering that the cutter 10 is severely worn or damaged, and then the cutter 10 can be replaced in time, so that the quality of the masterbatch produced is guaranteed.

[0050] As one embodiment of the present application, the cavity 7 in the cutter head 4 is provided with a second recess 20 on the inner wall of the shaping device 3; the second recess 20 corresponds to a square block 102 on the push plate 951 which is slidably connected with the limiting block 11; the square block 102 can enter the second recess 20 under the driving of the push plate 951; the contact surface between the square block 102 and the second recess 20 is a slope; during operation, the second recess 20 is provided on the inner wall of the cavity 7 and corresponds to the square block, so that when the square block limits the cutter 10, the square block 102 can be inserted into the second recess 20, and since the contact surface between the square block 102 and the second recess 20 is a slope, the square block 102 can easily enter the second recess 20, thereby playing a guiding role when the limiting block 11 is extruded, and thereby ensuring the stability of the limiting block 11.

[0051] In order to verify the effect of the actual replacement time of the staff replacing the cutter in the cutting system in the present application, the following experiment is made.

[0052] In order to verify the effect of the actual replacement time of the staff replacing the cutter in the cutting system in the present application, the following experiment is made.

[0053] Experiment group 1, using the cutting system in the present application:

[0054]

[0055] Experiment group 2, continuing to use the cutting system being used:

[0056]

[0057] Average time calculation formula

[0058]

[0059] The hydraulic pump pushing time equation is 15x3.14x cylinder diameter squarex cylinder stroke ÷ flow, so the time for the hydraulic pump to push the fixed cutter of the push plate in the application is 0.5 min; and the hydraulic pump retracting time equation is [15x3.14x cylinder diameter square-rod diameter squarex cylinder stroke] ÷ flow, so the time for the hydraulic pump to drive the push plate to relax the fixation of the cutter is 0.65 min.

[0060] Experiment 3, comparison of production efficiency of two production lines when replacing the cutter

[0061] From the recorded results of the above experiment group, it is found that the use of the pellet cutting system in the application reflects the simplification of the cutter replacement steps, the significant reduction of the cutter replacement time, and the improvement of the safety of the cutter replacement by using external tools, and the reduction of the maintenance time, so that the color master batch production line can recover work faster, thereby indirectly improving the production efficiency of the color master batch production line; among which the method of replacing the cutter in the pellet cutting system being used is found from the recorded data that the cutter replacement steps are complicated and the safety of the cutter replacement is low, thereby reducing the production efficiency of the color master batch production line, and then through the comparison of the data, it can be found that the pellet cutting system in the application has the advantages of convenient, fast and safe cutter replacement, thereby indirectly improving the production efficiency of the color master batch production line.

[0062] The above shows and describes the basic principles, main features and advantages of the application. It should be understood by those skilled in the art that the application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the application, and various changes and improvements can be made to the application without departing from the spirit and scope of the application, and these changes and improvements all fall within the scope of the claimed application. The scope of protection of the application is defined by the appended claims and their equivalents.

Claims

1. A masterbatch pelletizing system, comprising a transmission device (1), a rotating shaft (2), a shaping device (3), a cutter disc (4), and a protection device (5); characterized in that: It also includes a drive module (9) and a cutter (10); a rectangular hole (6) is provided on the outer wall of the cutter disc (4) and at one end near the shaping device (3); the rotating shaft (2) is fixedly connected to the cutter disc (4); The cutter head (4) has a cavity (7) inside; the rectangular hole (6) is connected to the cavity (7) inside the cutter head (4); a cutter (10) is slidably connected inside the rectangular hole (6); the rotating shaft (2) has a cylindrical cavity (8) inside; the cylindrical cavity (8) is connected to the cavity (7) inside the cutter head (4); the drive module (9) is located at one end of the rotating shaft (2); the drive module (9) can fix the cutter (10) when working; The drive module (9) includes two hydraulic pumps (91), an annular block (92), and a push unit (95); the annular block (92) is rotatably and sealedly connected to the rotating shaft (2); the outer wall of the rotating shaft (2) is provided with a through hole (93); the through hole (93) is connected to the cylindrical cavity (8); the annular block (92) is provided with an annular groove (94) inside; the annular groove (94) is connected to the through hole (93); The output ends of both hydraulic pumps (91) are fixedly connected to the annular block (92); a through groove is provided on the annular block (92) at a position corresponding to the fixed connection of the output ends of the hydraulic pumps (91); the through groove is connected to the annular groove (94); the pushing unit (95) is located in the cavity (7) inside the cutter head (4); hydraulic oil is provided between the cylindrical cavity (8) and the inner wall of the pushing unit (95) and the cavity (7) away from the shaping device (3); the two hydraulic pumps (91) can control the movement of the pushing unit (95) through the hydraulic oil; The pushing unit (95) includes a push plate (951); the push plate (951) is slidably and sealedly connected to the cavity (7) of the cutter head (4); the inner wall of the cavity (7) is provided with a guide block (21); a guide groove (22) is opened on the push plate (951); the guide block (21) is slidably and sealedly connected in the guide groove (22); the two hydraulic pumps (91) can control the movement of the push plate (951) through hydraulic oil.

2. The masterbatch pelletizing system according to claim 1, characterized in that: The push plate (951) is provided with limiting blocks (11) on both sides corresponding to the cutter (10); the limiting blocks (11) can limit the cutter (10).

3. The masterbatch pelletizing system according to claim 2, characterized in that: A rectangular groove (12) is provided in the limiting block (11); a spring (13) is fixedly connected to the inner wall of the rectangular groove (12) facing the shaping device (3); a rectangular block (14) is fixedly connected to the other end of the spring (13); the rectangular block (14) is slidably connected to the rectangular groove (12).

4. The masterbatch pelletizing system according to claim 2, characterized in that: The cavity (7) of the cutter head (4) has a protrusion (15) on one inner wall facing the shaping device (3); a groove (16) is opened on the push plate (951) at a position corresponding to the protrusion (15).

5. A masterbatch pelletizing system according to claim 1, characterized in that: The cutter (10) includes a blade (101) and a square block (102); the blade (101) and the square block (102) are fixedly connected; the two sides opposite to one end of the square block (102) facing the cavity (7) inside the cutter disc (4) are inclined surfaces; the protective device (5) is provided with an arc-shaped hole (18); an arc-shaped plate (19) is slidably connected inside the arc-shaped hole (18) and the arc-shaped plate (19) is made of transparent material.

6. A masterbatch pelletizing system according to claim 5, characterized in that: A locking block (23) is fixedly connected between adjacent limiting blocks (11) on the push plate (951); a locking groove (24) is provided on the square block (102); when the push plate (951) fixes the square block (102), the locking block (23) can be inserted into the locking groove (24); at least two locking grooves (24) are provided on the square block (102).

7. A masterbatch pelletizing system according to claim 1, characterized in that: A rubber pad (17) is fixedly connected to the surface of the push plate (951) that contacts the cutter (10); the friction between the rubber pad (17) and the cutter (10) is sufficient to limit and fix the cutter (10).

8. A masterbatch pelletizing system according to claim 3, characterized in that: The cavity (7) inside the cutter head (4) is provided with a second groove (20) facing the inner wall of the shaping device (3); the second groove (20) corresponds to the square block (102) on the push plate (951) that is slidably connected to the limiting block (11); the square block (102) can enter the second groove (20) under the drive of the push plate (951); the contact surface between the square block (102) and the second groove (20) is an inclined surface.

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