Granulating mechanism for TPV (thermoplastic vulcanizate) elastomer

Abstract

The utility model relates to a grain cutting mechanism for TPV elastomers, and relates to the field of water ring grain cutters, the grain cutting mechanism comprises a grain cutting support, a grain cutting water chamber, a cutter unit and a grain cutting driving unit, the grain cutting water chamber is arranged to be in a cylinder shape with one end open, the open end of the grain cutting water chamber extends out of the edge of the grain cutting support to be fixed to the grain cutting support, and the cutter unit is arranged on the grain cutting support. An automatic locking device used for locking an external extrusion template is arranged on the pelletizing water chamber, the cutter unit is arranged in the pelletizing water chamber, the pelletizing driving unit is arranged on the pelletizing support in a sliding mode, a driving shaft penetrates through the pelletizing water chamber to be connected with the cutter unit, and the working efficiency of the pelletizing mechanism can be improved.

Description

Technical Field

[0001] This application relates to the field of water-ring pelletizers, and particularly to a pelletizing mechanism for TPV elastomers. Background Art

[0002] Thermoplastic vulcanizate, abbreviated as TPV, mainly consists of two parts. One is plastic as the continuous phase, and the other is rubber as the dispersed phase. It has excellent anti-dynamic fatigue properties, high tear resistance, excellent weather resistance, good wear resistance, and outstanding flame retardant and anti-ultraviolet properties. It has excellent corrosion resistance to water-based acid-base liquids and polar oils, and has been widely used in industries such as automotive parts, electronic and electrical, sports equipment, and wire and cable.

[0003] TPV materials are usually first processed into elastomer particles, and then the elastomer particles are used as raw materials for finished product processing. When processing TPV elastomers, the TPV materials are usually heated to a molten state in an extruder and continuously extruded into a water chamber through the extrusion holes on the extrusion die. Then, a pelletizer is used to cut the molten material extruded into the water chamber to form TPV elastomer particles.

[0004] In the existing pelletizer for cutting TPV elastomers, before pelletizing, it is necessary to manually operate to fix the water chamber of the pelletizer on the extruder so that a sealed state is formed between the water chamber and the extruder. It is also necessary to manually adjust the pressure between the cutting knife of the pelletizer and the extrusion die in the extruder to ensure good cutting of the TPV materials extruded through the extrusion die. The connection and adjustment processes are relatively complex, which affects the working efficiency of the pelletizer. Summary of the Utility Model

[0005] In order to improve the working efficiency of the pelletizing mechanism, this application provides a pelletizing mechanism for TPV elastomers.

[0006] The pelletizing mechanism for TPV elastomers provided by this application includes a pelletizing bracket, a pelletizing water chamber, a cutting knife unit, and a pelletizing driving unit. The pelletizing water chamber is set as a cylindrical shape with one end open. The open end of the pelletizing water chamber extends out of the edge of the pelletizing bracket and is fixed on the pelletizing bracket. An automatic locking device for locking an external extrusion die is provided on the pelletizing water chamber. The cutting knife unit is arranged in the pelletizing water chamber. The pelletizing driving unit is slidably arranged on the pelletizing bracket, and the driving shaft passes through the pelletizing water chamber and is connected to the cutting knife unit.

[0007] Preferably, the automatic locking device includes a locking rod and a torsion spring. One end of the locking rod is provided with a locking hook, and a hinge protrusion is arranged in the middle. The locking rod is hinged on the side wall of the pelletizing water chamber through the hinge protrusion, so that the locking hook extends out of the open end of the pelletizing water chamber. The torsion spring is arranged on the hinge shaft of the locking rod and the pelletizing water chamber.

[0008] Further preferably, a wedge block mounting plate, an unlocking wedge block and an unlocking oil cylinder are further arranged on the pelletizing water chamber. The wedge block mounting plate is fixed on the side wall of the pelletizing water chamber. The unlocking wedge block is slidably arranged on the wedge block mounting plate, and the wedge-shaped surface abuts against the end of the locking rod. The unlocking oil cylinder is fixed on the wedge block mounting plate and is connected to the unlocking wedge block.

[0009] Preferably, a water inlet interface is arranged at the top of the pelletizing water chamber, and a water outlet interface is arranged at the bottom of the pelletizing water chamber.

[0010] Preferably, the cutting unit includes a cutter head and a plurality of cutters. The cutter head is fixed on the drive shaft of the pelletizing drive unit, and the plurality of cutters are evenly fixed on the edge of the cutter head.

[0011] Further preferably, an inclined shearing edge strip is arranged on one side of the cutter, and a reversely inclined balancing blade is arranged at the end of the cutter.

[0012] Preferably, the pelletizing drive unit includes a sliding mounting plate and a cutter drive motor. The sliding mounting plate is slidably connected with the pelletizing bracket so as to be able to slide axially along the pelletizing water chamber on the pelletizing bracket. The cutter drive motor is fixed on the sliding mounting plate. The output shaft of the cutter drive motor is slidably connected with the closed end of the pelletizing water chamber, and the cutting unit is fixed on the output shaft of the cutter drive motor.

[0013] Further preferably, a compression tension spring is arranged between the sliding mounting plate and the pelletizing bracket.

[0014] Preferably, the pelletizing mechanism for TPV elastomer of the present application further includes a bracket track, the bracket track is arranged opposite to an external extrusion die plate, walking wheels are arranged at the bottom of the pelletizing bracket, and the pelletizing bracket is mounted on the bracket track through the walking wheels.

[0015] Further preferably, a pushing column is arranged at one end of the bracket track, and a bracket pushing hydraulic cylinder is arranged on the pelletizing bracket. The piston rod of the bracket pushing hydraulic cylinder is fixed on the pushing column.

[0016] The pelletizing mechanism for TPV elastomer of the present application has at least one of the following beneficial technical effects:

[0017] 1. By using the automatic locking device provided on the pelletizing water chamber, when the pelletizing mechanism for TPV elastomer in this application comes into contact with the extrusion mechanism, the pelletizing water chamber can be automatically locked onto the extrusion mechanism, forming a seal between the pelletizing water chamber and the extrusion mechanism, making the connection and sealing between the pelletizing water chamber and the extrusion mechanism more convenient;

[0018] 2. By using the unlocking wedge block and unlocking oil cylinder provided on the pelletizing water chamber, it is possible to conveniently push the locking lever to rotate on the pelletizing water chamber, so that the locking hook is separated from the extrusion mechanism, thus conveniently unlocking the pelletizing water chamber from the extrusion mechanism and facilitating the cleaning of the water chamber and the maintenance of the cutting knife unit;

[0019] 3. By using the balance cutting piece on the cutting knife that is inclined in the opposite direction to the cutting edge strip, it is possible to counteract the axial thrust formed by the water acting on the cutting edge strip when the cutting knife rotates in water, reduce the influence of the cutting knife rotation speed on the pressure between the cutting knife and the extrusion template, and improve the stability of the pelletizing effect of TPV elastomer;

[0020] 4. By using a pressurizing tension spring provided between the sliding mounting plate and the pelletizing support, a stable axial thrust can be applied to the cutting knife unit, improving the stability of the pressure between the cutting knife unit and the extrusion template and ensuring the pelletizing effect of TPV elastomer. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of an embodiment of this application.

[0022] Figure 2 It is a schematic diagram of the cutting knife unit in an embodiment of this application.

[0023] Figure 3 It is a schematic diagram of the cutting knife structure in an embodiment of this application.

[0024] Figure 4 It is a schematic diagram of the adjacent structure of the extrusion template of the extrusion mechanism adapted to this application.

[0025] Description of the reference numerals: 1, pelletizing support; 11, traveling wheel; 12, support pushing hydraulic cylinder; 2, pelletizing water chamber; 21, locking lever; 211, locking hook; 212, hinged protrusion; 22, torsion spring; 23, wedge block mounting plate; 24, unlocking wedge block; 25, unlocking oil cylinder; 26, water inlet interface; 27, water outlet interface; 3, cutting knife unit; 31, cutter head; 32, cutting knife; 321, cutting edge strip; 322, balance cutting piece; 4, pelletizing drive unit; 41, sliding mounting plate; 42, cutting knife drive motor; 43, pressurizing tension spring; 5, support track; 6, pushing column; 7, extrusion mechanism; 71, extrusion template; 72, extrusion connecting plate. Detailed Description of the Invention

[0026] The following will describe in detail the specific embodiments of the present application with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining and understanding the present application, and are not used to limit the present application.

[0027] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "arrangement" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0028] An embodiment of the granulating mechanism for TPV elastomer of the present application is as Figures 1 to 3 shown, including a granulating bracket 1, a granulating water chamber 2, a cutting knife unit 3, and a granulating driving unit 4.

[0029] The granulating bracket 1 is installed on the ground and is used to install and support the granulating water chamber 2, the cutting knife unit 3, and the granulating driving unit 4, so that the granulating water chamber 2 installed on the granulating bracket 1 is in a position corresponding to the extrusion mechanism. The granulating bracket 1 is usually installed on the ground at the opposite end of the extrusion mechanism that is matched with the granulating mechanism for TPV elastomer of the present application.

[0030] As Figure 4 shown, one end of the extrusion mechanism 7 is provided with an extrusion die plate 71, and a plurality of die extrusion holes are provided at the peripheral part of the extrusion die plate 71. The molten TPV material is extruded from the die extrusion holes under the extrusion of the extrusion screw. The extrusion die plate 71 is closed at the end of the extrusion mechanism 7, and an extrusion connecting plate 72 is provided on the outer periphery of the end of the extrusion mechanism 7.

[0031] A bracket track 5 is provided on the ground outside the extrusion die plate 71, and the bracket track 5 is arranged facing the extrusion die plate 71 perpendicular to the direction of the extrusion die plate 71. Traveling wheels 11 are provided at the bottom of the granulating bracket 1, and the granulating bracket 1 is installed on the bracket track 5 through the traveling wheels 11 and can slide on the bracket track 5 in a direction approaching or away from the extrusion die plate 71.

[0032] The pelletizing water chamber 2 is cylindrical with one end open, and a storage space for water is formed inside the cylindrical pelletizing water chamber 2. The pelletizing water chamber 2 is fixed on the pelletizing support 1, and the open end of the pelletizing water chamber 2 extends beyond the edge of the pelletizing support 1. When the pelletizing support 1 slides on the support track 5 to near the extrusion mechanism 7, the open end of the pelletizing water chamber 2 can fit onto the extrusion mechanism 7, and the extrusion mechanism 7 covers the open end of the pelletizing water chamber 2 to enclose the extrusion die plate 71 in the water storage space inside the pelletizing water chamber 2, so that the molten TPV material extruded through the die extrusion holes on the extrusion die plate 71 can be extruded into the water in the water chamber.

[0033] Specifically, a water chamber connecting plate is provided at the edge of the open end of the pelletizing water chamber 2, and a sealing ring is provided on the outer side surface of the water chamber connecting plate. When the pelletizing support 1 moves towards the extrusion mechanism 7, the water chamber connecting plate can fit onto the extrusion connecting plate 72, and a seal is formed between the two through the sealing ring.

[0034] An inlet interface 26 is provided at the top of the pelletizing water chamber 2, and an outlet interface 27 is provided at the bottom of the pelletizing water chamber 2. Circulating water can be input into the interior of the pelletizing water chamber 2 through the inlet interface 26 to cool the TPV material. The circulating water inside the pelletizing water chamber 2 flows out through the outlet interface 27, and the TPV elastomer particles formed by pelletizing are transported away by the circulating water.

[0035] An automatic locking device is provided on the outer side surface of the pelletizing water chamber 2. When the pelletizing support 1 moves to the position where the water chamber connecting plate fits onto the extrusion connecting plate 72, the automatic locking device can engage with the extrusion connecting plate 72 to lock the water chamber connecting plate onto the extrusion connecting plate 72, so that the water chamber connecting plate remains in a connected state with the extrusion connecting plate 72 and ensures a reliable seal between the two.

[0036] The cutting knife unit 3 is arranged inside the pelletizing water chamber 2 and can rotate inside the pelletizing water chamber 2. When the water chamber connecting plate fits onto the extrusion connecting plate 72, the cutting knife unit 3 fits onto the extrusion die plate 71, and the TPV material extruded through the extrusion die plate 71 is cut by the rotation of the cutting knife unit 3 to form TPV elastomer particles.

[0037] The drive shaft of the pelletizing drive unit 4 passes through the closed end of the pelletizing water chamber 2 and enters the interior of the pelletizing water chamber 2, and is connected to the rotating shaft of the cutting knife unit 3, so that the cutting knife unit 3 can rotate driven by the pelletizing drive unit 4. The pelletizing drive unit 4 is slidably arranged on the pelletizing support 1 and can slide along the upper side of the drive shaft on the pelletizing support 1. The drive shaft of the pelletizing drive unit 4 is slidably connected to the end wall of the pelletizing water chamber 2. When the pelletizing drive unit 4 slides, it can push the cutting knife unit 3 to press on the extrusion die plate 71 with a certain pressure, ensuring reliable cutting of the TPV material extruded from the die extrusion holes and ensuring a flat cutting surface, resulting in a better cutting effect.

[0038] As shown Figure 1 in FIG. 1, the automatic locking device includes a locking latch 21 and a torsion spring 22. One end of the locking latch 21 is provided with a locking hook 211, and the middle part of the locking latch 21 is provided with a hinge protrusion 212. The locking latch 21 is hinged on the hinge block on the side wall of the pelletizing water chamber 2 through the hinge protrusion 212, so that the locking hook 211 extends out of the opening end of the pelletizing water chamber 2 and is located outside the water chamber connecting plate. By rotating the locking latch 21 on the side wall of the pelletizing water chamber 2, the locking hook 211 can move in a direction close to or away from the pelletizing water chamber 2.

[0039] The torsion spring 22 is sleeved on the hinge shaft of the locking latch 21 and the pelletizing water chamber 2. One end of the torsion spring 22 abuts against the locking latch 21, and the other end abuts against the pelletizing water chamber 2. Under the elastic force of the torsion spring 22, the locking hook 211 moves towards the center direction of the water chamber connecting plate until the locking latch 21 abuts against the edge of the water chamber connecting plate.

[0040] The outer end face of the locking hook 211 is set as an inclined guiding surface, and the inner end face is set as a flat engaging surface. When the pelletizing water chamber 2 moves towards the extrusion mechanism 7, the guiding surface on the outer side of the locking hook 211 abuts against the edge of the extrusion connecting plate 72, and pushes the end of the locking latch 21 to move outwards against the elastic force of the torsion spring 22. When the locking hook 211 passes over the extrusion connecting plate 72, it moves towards the middle of the extrusion connecting plate 72 under the elastic force of the torsion spring 22, and is engaged with the extrusion connecting plate 72 through the engaging surface of the locking hook 211, forming a reliable connection with the extrusion mechanism 7.

[0041] As shown Figure 1As shown, a wedge block mounting plate 23, an unlocking wedge block 24, and an unlocking oil cylinder 25 are further provided at a position on the pelletizing water chamber 2 corresponding to the end of the other end of the locking latch 21. The two wedge block mounting plates 23 are both fixed on the side wall of the pelletizing water chamber 2 and are arranged parallel to the length direction of the locking latch 21 on both sides of the locking latch 21 respectively. Sliding connection holes are provided at corresponding positions on the two wedge block mounting plates 23. One end of the unlocking wedge block 24 is provided with a square sliding connecting rod, and the unlocking wedge block 24 is slidably connected to one wedge block mounting plate 23 through the sliding connecting rod passing through the sliding connection hole. The unlocking oil cylinder 25 is fixed on the outside of the other wedge block mounting plate 23, and the piston rod of the unlocking oil cylinder 25 passes through the sliding connection hole and is connected to the unlocking wedge block 24, so that the unlocking wedge block 24 can slide between the two wedge block mounting plates 23 under the action of the unlocking oil cylinder 25. A wedge-shaped surface is provided on the side of the unlocking wedge block 24 adjacent to the locking latch 21. When the unlocking wedge block 24 slides on the wedge block mounting plate 23 under the action of the unlocking oil cylinder 25, the wedge-shaped surface can squeeze the other end of the locking latch 21, causing the other end of the locking latch 21 to rotate towards the pelletizing water chamber 2, thereby driving the locking hook 211 to move away from the extrusion connecting plate 72, and finally leaving the extrusion connecting plate 72 to unlock the pelletizing water chamber 2 from the extrusion connecting plate 72. Moving the pelletizing bracket 1 can separate the pelletizing water chamber 2 from the extrusion mechanism 7, facilitating the cleaning of the inside of the pelletizing water chamber 2 and the maintenance of the cutting knife unit 3.

[0042] As Figure 2 shown, the cutting knife unit 3 includes a cutter head 31 and a plurality of cutting knives 32. The cutter head 31 is fixed inside the pelletizing water chamber 2 and is fixed on the drive shaft of the pelletizing drive unit 4. A plurality of cutting knife mounting holes are provided at the edge part of the cutter head 31, and a plurality of cutting knives 32 are fixed in the cutting knife mounting holes on the cutter head 31 and are evenly arranged in the circumferential direction of the cutter head 31. The arrangement of the plurality of cutting knives 32 in the cutting knife mounting holes respectively facilitates the individual replacement of the damaged cutting knives 32 on the cutter head 31, can improve the convenience of replacing the cutting knives 32, and reduce the replacement cost of the cutting knives 32.

[0043] In a preferred embodiment of the present application, as Figure 3 shown, a shearing blade strip 321 is provided on one side of the cutting knife 32. The shearing blade strip 321 is provided on one side in front of the rotation direction of the cutting knife 32 and is inclined towards the extrusion die plate 71 and the rotation direction of the cutting knife 32. A balancing scribe 322 is provided at the end of the cutting knife 32 and is inclined in a direction opposite to the inclination direction of the shearing blade strip 321.

[0044] The inclined setting of the shearing blade strip 321 can improve the tangential bearing capacity of the shearing blade strip 321, increase the shearing force on the TPV material extruded through the extrusion die 71, and is beneficial to improving the cutting effect on the TPV material. However, at the same time, the cutting of the PTV material by the cutting knife 32 is carried out in water, and the water generates a large axial driving force on the inclined shearing blade strip 321, and this axial driving force increases with the increase of the rotation speed of the cutting knife 32, which has a great impact on the actual pressure between the cutting knife 32 and the extrusion die 71, and destroys the stability of the actual pressure between the cutting knife 32 and the extrusion die 71. On the contrary, the inclined balancing slicing blade 322 can form an axial thrust in water in the opposite direction to the axial thrust formed on the shearing blade strip 321, offset the axial driving force generated by the shearing blade strip 321, thereby reducing the influence of the change in the rotation speed of the cutting knife 32 on the actual pressure between the cutting knife 32 and the extrusion die 71, and ensuring the stability of the actual pressure between the cutting knife 32 and the extrusion die 71.

[0045] The pelletizing driving unit 4 includes a sliding mounting plate 41 and a cutting knife driving motor 42. The sliding mounting plate 41 is slidably mounted on the pelletizing support 1 through the cooperation between the chute and the slide rail, and can slide on the pelletizing support 1 along the axial direction of the pelletizing water chamber 2. The cutting knife driving motor 42 is fixed on the sliding mounting plate 41, the output shaft of the cutting knife driving motor 42 is slidably connected to the side wall of the closed end of the pelletizing water chamber 2, and the cutting knife unit 3 is fixed on the output shaft of the cutting knife driving motor 42. When the sliding mounting plate 41 slides along the axial direction of the pelletizing water chamber 2 towards the extrusion die 71, the cutting knife unit 3 can be brought into contact with the extrusion die 71, and the cutting knife 32 is pressed against the extrusion die 71 with a certain pressure, improving the cutting effect on the PTV material extruded through the extrusion holes of the die.

[0046] As Figure 1 shown, an installation plate spring mounting block is provided on the sliding mounting plate 41, a support spring mounting block is provided on the pelletizing support 1 below the pelletizing water chamber 2, and a pressurizing tension spring 43 is connected between the installation plate spring mounting block and the support spring mounting block. The pressurizing tension spring 43 can form a stable traction force on the sliding mounting plate 41, buffer the change in the pressing force between the cutting knife 32 and the extrusion die 71, improve the stability of the pressing force between the cutting knife 32 and the extrusion die 71, and ensure the stability of the pelletizing effect of the TPV elastomer particles.

[0047] In a preferred embodiment of the present application, as Figure 1 shown, a pushing column 6 is provided on the ground at one end of the support track 5, a support pushing hydraulic cylinder 12 is provided on the pelletizing support 1, the piston rod of the support pushing hydraulic cylinder 12 is hinged to the top of the pushing column 6, and by controlling the oil supply direction of the support pushing hydraulic cylinder 12, the telescopic movement of the piston rod of the support pushing hydraulic cylinder 12 can be controlled to push the pelletizing support 1 to move on the support track 5.

[0048] The oil supply direction of the unlocking oil cylinder 25 can also be set to be linked with the oil supply direction of the support pushing hydraulic cylinder 12, so that when the pelletizing support 1 moves towards the extrusion mechanism 7, the unlocking wedge block 24 does not generate a driving force on the locking latch 21, facilitating the engagement of the locking hook 211 with the extrusion connecting plate 72; and when the pelletizing support 1 moves away from the extrusion mechanism 7, the unlocking wedge block 24 first pushes the locking latch 21 to rotate, causing the locking hook 211 to leave the extrusion connecting plate 72, unlocking the pelletizing water chamber 2 from the extrusion mechanism 7, and realizing the automation of locking and unlocking between the pelletizing water chamber 2 and the extrusion mechanism 7.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A pelletizing mechanism for TPV elastomer, characterized in that: The invention comprises a pelletizing support (1), a pelletizing water chamber (2), a cutter unit (3) and a pelletizing drive unit (4); the pelletizing water chamber (2) is arranged in a cylindrical shape with one end open; the open end of the pelletizing water chamber (2) extends out of the edge of the pelletizing support (1) and is fixed on the pelletizing support (1); the pelletizing water chamber (2) is provided with an automatic locking device for locking an external extrusion template; the cutter unit (3) is arranged in the pelletizing water chamber (2); the pelletizing drive unit (4) is slidably arranged on the pelletizing support (1), and the drive shaft passes through the pelletizing water chamber (2) and is connected to the cutter unit (3).

2. The pelletizing mechanism for TPV elastomer according to claim 1, characterized in that: The automatic locking device comprises a locking rod (21) and a torsion spring (22); a locking hook (211) is arranged at one end of the locking rod (21); a hinge protrusion (212) is arranged in the middle, and the locking rod (21) is hinged to the side wall of the pelletizing water chamber (2) through the hinge protrusion (212), so that the locking hook (211) extends out of the opening end of the pelletizing water chamber (2); and the torsion spring (22) is arranged on the hinge shaft between the locking rod (21) and the pelletizing water chamber (2).

3. The pelletizing mechanism for TPV elastomer according to claim 2, characterized in that: The pelletizing water chamber (2) is also provided with a wedge mounting plate (23), an unlocking wedge (24) and an unlocking oil cylinder (25); the wedge mounting plate (23) is fixed to the side wall of the pelletizing water chamber (2); the unlocking wedge (24) is slidably arranged on the wedge mounting plate (23), and the wedge-shaped surface abuts against the end of the locking clamping rod (21); the unlocking oil cylinder (25) is fixed on the wedge mounting plate (23) and connected to the unlocking wedge (24).

4. The pelletizing mechanism for TPV elastomer according to claim 1, characterized in that: The top of the pelletizing water chamber (2) is provided with a water inlet interface (26), and the bottom of the pelletizing water chamber (2) is provided with a water outlet interface (27).

5. The pelletizing mechanism for TPV elastomer according to claim 1, characterized in that: The cutter unit (3) comprises a cutter disc (31) and a plurality of cutters (32); the cutter disc (31) is fixed on a drive shaft of the pelletizing drive unit (4); and the plurality of cutters (32) are evenly fixed on the edge of the cutter disc (31).

6. The pelletizing mechanism for TPV elastomer according to claim 5, characterized in that: A shearing blade (321) arranged obliquely is arranged on one side of the cutter (32), and a counter-inclined balancing scribe (322) is arranged at the end of the cutter (32).

7. The pelletizing mechanism for TPV elastomer according to claim 1, characterized in that: The pelletizing drive unit (4) comprises a sliding mounting plate (41) and a cutter drive motor (42); the sliding mounting plate (41) is slidably connected to the pelletizing bracket (1) so as to be able to slide on the pelletizing bracket (1) along the axial direction of the pelletizing water chamber (2); the cutter drive motor (42) is fixed to the sliding mounting plate (41); the output shaft of the cutter drive motor (42) is slidably connected to the closed end of the pelletizing water chamber (2); and the cutter unit (3) is fixed to the output shaft of the cutter drive motor (42).

8. The pelletizing mechanism for TPV elastomer according to claim 7, characterized in that: A pressure tension spring (43) is provided between the sliding mounting plate (41) and the pelletizing support (1).

9. The pelletizing mechanism for TPV elastomer according to any one of claims 1 to 8, characterized in that: It also comprises a support track (5), wherein the support track (5) is arranged opposite to the external extrusion template, and a running wheel (11) is arranged at the bottom of the pelletizing support (1), and the pelletizing support (1) is installed on the support track (5) via the running wheel (11).

10. The pelletizing mechanism for TPV elastomer according to claim 9, characterized in that: A pushing column (6) is arranged at one end of the support rail (5), a support pushing hydraulic cylinder (12) is arranged on the pelletizing support (1), and a piston rod of the support pushing hydraulic cylinder (12) is fixed on the pushing column (6).

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