Extrusion and pelletizing device for silicone masterbatch for thermoplastics

Abstract

The present invention belongs to the technical field of silicone masterbatch production, specifically to an extrusion and pelletizing device for silicone masterbatch for thermoplastic plastics, comprising an extruder, an output end of the extruder being provided with a water tank, and one side of the water tank being provided with a limiting roller; the present invention performs scraping cleaning on the outer wall of a cleaning knife through a replacement mechanism in a cleaning mechanism, ensuring that the cutting effect of the cutting knife is not affected during cutting, and through the mutual cooperation of a transmission mechanism and a limiting mechanism, first releases the limitation of the movable sleeve by a fixed plate and a third limiting plate, and then pushes one side of the movable sleeve downward through a first moving rod to keep the cleaning block away from the cutting knife, and the cleaning block rotates to the top to avoid punctures when the cleaning block is replaced, and at the same time, the cleaning block moves to the top to improve the convenience of replacing the cleaning block, thereby jointly improving the subsequent cutting effect, and solving the problem that the existing device cannot conveniently replace the cleaning tool on the basis of cleaning the cutting knife.

Description

Technical Field

[0001] The invention relates to the technical field of silicone masterbatch production, in particular to an extrusion and pelletizing device for silicone masterbatch for thermoplastic plastics. Background Art

[0002] Silicone masterbatch is the raw material for the manufacture of silicone plastic lubricants. Silicone plastic lubricants have become an indispensable functional additive in the processing of plastic products. They can not only effectively improve the fluidity of polymers during molding, but also reduce resistance and equipment wear.

[0003] Generally, silicone masterbatch is extruded into long strips through an extruder, and then cut into granules of suitable size after cooling and shaping. According to a silicone masterbatch underwater pelletizing device disclosed in Patent No. CN211616228U, the pelletizing device is set underwater, and the silicone master rod extruded from the extruder is directly put into a water tank for pre-cooling, and the silicone master rod is cut by a cutting blade that moves up and down to avoid the occurrence of the cut edge of the completely cooled and brittle silicone master rod being broken during cutting. However, the silicone master rod that has not been completely cooled still has liquid silicone master plastic in its center. The incompletely cooled silicone master rod will adhere to the cutting blade. With long-term use, the adhesion on the cutting blade will increase, affecting the cutting of the silicone master rod by the cutting blade. In the prior art, it is difficult to perform a scraping cleaning process on the cutting blade, and it is also impossible to make a further convenient replacement of the cleaning tool for the cutting blade to jointly improve the subsequent cutting effect.

[0004] In view of the above technical defects, a solution is now proposed. Summary of the Invention

[0005] The object of the present invention is to provide an extrusion and pelletizing device for silicone masterbatch for thermoplastic plastics, wherein the outer wall of the cleaning knife is scraped and cleaned by a replacement mechanism in the cleaning mechanism to ensure that the cutting effect of the cutting knife is not affected during cutting. Through the mutual cooperation of the transmission mechanism and the limiting mechanism, the limiting of the movable sleeve by the fixed plate and the third limiting plate is first released, and then one side of the movable sleeve is pushed downward by the first moving rod to keep the cleaning block away from the cutting knife, and the cleaning block is rotated to the top to avoid puncture when replacing the cleaning block. At the same time, the movement of the cleaning block to the top improves the convenience of replacing the cleaning block, and jointly improves the subsequent cutting effect, solving the problem that the existing device cannot conveniently replace the cleaning tool on the basis of cleaning the cutting knife.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An extrusion and pelletizing device for silicone masterbatch for thermoplastic plastics comprises an extruder, a water tank is provided at the output end of the extruder, a limiting roller is provided on one side of the interior of the water tank, an equipment frame is fixedly connected to the top of the water tank, a cleaning mechanism is provided at the bottom of the equipment frame, and a screen plate is provided at the bottom of the cleaning mechanism;

[0008] The cleaning mechanism includes a first limit sleeve, a transmission mechanism, a limit mechanism, a replacement mechanism, a cutting knife, a first limit shaft, a cam, a limit box, a slide rail, a counterweight block and a force plate, two sets of slide rails are opened on the inner wall of the water tank, the inner walls of the two sets of slide rails are slidably connected to the limit box, the top of the limit box is fixedly connected to the counterweight block, the first limit shaft is provided at the bottom of the limit box, one end of the first limit shaft is movably passed through the outside of the water tank and is provided with a driving device, the first limit shaft is located on the outer wall of the water tank and is fixedly connected to the cam, the cam and the limit box cooperate with each other, one end of the bottom of the limit box is fixedly connected to the cutting knife, a cutting groove is opened on the outer wall above the screen plate, the cutting knife and the cutting groove correspond to each other, the side wall of the limit box is fixedly connected to the force plate, a replacement mechanism is provided on one side of the cutting knife, and a limiting mechanism and a transmission mechanism are provided on the top of the replacement mechanism.

[0009] Furthermore, the replacement mechanism includes a cleaning rod, a movable sleeve, a third limiting shaft, a thrust spring, a mounting plate, a cleaning block and a third limiting plate. The outer walls on both sides of the movable sleeve are rotatably connected to the third limiting shaft through bearings, one end of the third limiting shaft is fixedly connected to the inner wall of the water tank, the inner wall of the movable sleeve is slidingly connected to the cleaning rod, one end of the cleaning rod is fixedly connected to the mounting plate, a cleaning block is provided on the outer wall of the mounting plate, a thrust spring is provided between the mounting plate and the movable sleeve, the thrust spring sleeve is provided on the outside of the cleaning rod, and the bottom end of the movable sleeve is provided with a third limiting plate.

[0010] Furthermore, the third limiting shaft is located on a side of the movable sleeve away from the cleaning block, the third limiting plate is in contact with the outer wall of the movable sleeve, and the third limiting plate is fixedly connected to the inner wall of the water tank.

[0011] Furthermore, the transmission mechanism includes a first limit plate, a first moving rod, a first limit pin, a second limit plate, a thrust plate, a hydraulic rod and a second limit shaft, the hydraulic rod is fixedly connected to the equipment frame, the output end of the hydraulic rod is fixedly connected to the thrust plate, the output end of the hydraulic rod is provided with a first limit plate, the first limit plate is provided with a first moving rod on the side of the first limit plate away from the hydraulic rod, the second limit shaft is rotatably connected to the outer wall of the first limit plate close to the hydraulic rod through a bearing, both ends of the second limit shaft are fixedly connected to the inner wall of the water tank, the first limit sleeve is slidably connected to the outer wall of the top of the first moving rod, the first limit sleeve is fixedly connected to the inner wall of the water tank, the first limit pin is rotatably connected to the outer wall of the bottom of the first moving rod, the second limit plate is provided on the outer side of the first limit pin, and the bottom end of the second limit plate is fixedly connected to the movable sleeve.

[0012] Furthermore, a first slide groove and a second slide groove are provided on the outer wall of the first limit plate, and the length of the second slide groove is greater than that of the first slide groove. The outer wall of the output end of the hydraulic rod is movably connected to the first slide groove through a shift rod, and the outer wall of the first motion rod is movably connected to the second slide groove through a shift rod. A third slide groove is provided on the outer wall of the second limit plate, and the first limit pin is movably connected to the third slide groove, and the third slide groove is V-shaped.

[0013] Furthermore, the distance from the center of the first limiting shaft to the limiting box is greater than the distance between the force-bearing plate and the thrust plate.

[0014] Furthermore, the limiting mechanism includes an inclined plate, a movable groove, a tension spring, a fixed plate and a connecting plate. The top of the inclined plate is fixedly connected to the thrust plate, the bottom of the inclined plate is provided with a connecting plate, a movable groove is provided on the outer wall of the connecting plate, the bottom end of the connecting plate is slidably connected to the fixed plate, the fixed plate contacts the outer wall of the movable sleeve, one side of the fixed plate is an inclined surface, the bottom of the inclined plate passes through the movable groove and cooperates with the inclined surface of the fixed plate, both ends of the inclined surface of the fixed plate are fixedly connected with a tension spring, one end of the tension spring is fixedly connected to the inner wall of the water tank, and the connecting plate is fixedly connected to the inner wall of the water tank.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, the driving device drives the first limit shaft to rotate, and the first limit shaft drives the limit box to reciprocate. The limit box is limited by the slide rail during the reciprocating motion, and the counterweight block provided on the top of the limit box ensures the force of the cutting knife when cutting the silicone masterbatch rod. The cutting knife cuts the silicone masterbatch rod into particles as the limit box reciprocates. The cleaning block in the replacement mechanism can clean the outer wall of the cutting knife to ensure that the cutting effect of the cutting knife is not affected.

[0017] 2. In the present invention, when the hydraulic rod contracts, the inclined plate moves upward with the hydraulic rod, releasing the limit on the fixed plate. The fixed plate matched with the inclined plate is quickly reset due to the action of the tension spring. At this time, the fixed plate releases the limit on the movable sleeve. At the same time, when the hydraulic rod contracts, one side of the first limit plate tilts upward, causing one side of the first motion rod on the first limit plate to push downward. The first motion rod pushes the first limit pin downward to move on the inner wall of the third slide groove until the thrust plate and the force-bearing plate contact each other. When the thrust plate drives the force-bearing plate to move upward, the first limit pin moves. When the cleaning block is moved to the top, the cleaning block is moved away from the cutting blade and the cleaning block is rotated to the top, which is convenient for replacing the cleaning block. The fixed plate and the third limiting plate are first released from the position limit of the movable sleeve through the cooperation of the transmission mechanism and the limiting mechanism, and then one side of the movable sleeve is pushed downward by the first motion rod to keep the cleaning block away from the cutting blade and the cleaning block is rotated to the top, thereby avoiding puncture when replacing the cleaning block. At the same time, the cleaning block moves to the top to improve the convenience of replacing the cleaning block.

[0018] 3. In the present invention, the outer wall of the cleaning knife is scraped and cleaned by the replacement mechanism in the cleaning mechanism to ensure that the cutting effect of the cutting knife is not affected during cutting. Through the mutual cooperation of the transmission mechanism and the limiting mechanism, the limiting of the movable sleeve by the fixed plate and the third limiting plate is first released, and then one side of the movable sleeve is pushed downward by the first moving rod to keep the cleaning block away from the cutting knife, and the cleaning block is rotated to the top to avoid puncture when replacing the cleaning block. At the same time, the cleaning block moves to the top to improve the convenience of replacing the cleaning block, thereby jointly improving the subsequent cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the invention will be further described below with reference to the accompanying drawings;

[0020] Figure 1 It is a schematic diagram of the overall structure of the invention;

[0021] Figure 2 It is an enlarged schematic diagram of the structure of the cleaning mechanism in the invention;

[0022] Figure 3 It is an enlarged schematic diagram of the structure of the transmission mechanism in the invention;

[0023] Figure 4 It is an enlarged schematic diagram of the structure of the replacement mechanism in the invention;

[0024] Figure 5 It is an enlarged schematic diagram of the structure of the limiting mechanism in the invention;

[0025] Figure 6 It is an exploded diagram of the structure of the limiting mechanism in the invention;

[0026] Figure 7 It is a front view of the cutting groove in the invention.

[0027] Figure numerals: 1, limit roller; 2, extruder; 3, screen plate; 4, water tank; 5, cleaning mechanism; 6, equipment frame; 7, cutting groove; 51, first limit sleeve; 52, transmission mechanism; 53, limit mechanism; 54, replacement mechanism; 55, cutting knife; 56, first limit shaft; 57, cam; 58, limit box; 59, slide rail; 510, counterweight; 511, force plate; 521, first limit plate; 522, first motion Rod; 523, first limit pin; 524, second limit plate; 525, thrust plate; 526, hydraulic rod; 527, second limit shaft; 531, inclined plate; 532, movable groove; 533, tension spring; 534, fixed plate; 535, connecting plate; 541, cleaning rod; 542, movable sleeve; 543, third limit shaft; 544, thrust spring; 545, mounting plate; 546, cleaning block; 547, third limit plate. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] Example 1:

[0030] The silicone mother rod that has not been completely cooled still has liquid silicone mother plastic in its center. The silicone mother rod that has not been completely cooled will adhere to the cutting knife. Over a long period of use, the adhesion on the cutting knife will increase, affecting the cutting of the silicone mother rod by the cutting knife. A solution is now proposed:

[0031] like Figure 1-7 As shown, the extrusion and pelletizing device for silicone masterbatch for thermoplastic plastics proposed by the present invention includes an extruder 2, a water tank 4 is provided at the output end of the extruder 2, and fluid cooling water is provided inside the water tank 4 to cool and cut the silicone masterbatch rods. A limiting roller 1 is provided on one side of the water tank 4 to guide the silicone masterbatch rods. An equipment frame 6 is fixedly connected to the top of the water tank 4, a cleaning mechanism 5 is provided at the bottom of the equipment frame 6, and a screen plate 3 is provided at the bottom of the cleaning mechanism 5. The screen plate 3 screens the cut silicone masterbatch to remove some particles with larger or smaller particle sizes caused by uneven discharge of the extruder 2, thereby preventing them from affecting the quality of the final product.

[0032] The cleaning mechanism 5 includes a first limiting sleeve 51, a transmission mechanism 52, a limiting mechanism 53, a replacement mechanism 54, a cutting knife 55, a first limiting shaft 56, a cam 57, a limiting box 58, a slide rail 59, a counterweight 510 and a force plate 511. Two sets of slide rails 59 are provided on the inner wall of the water tank 4. The inner walls of the two sets of slide rails 59 are slidably connected to the limiting box 58. The top of the limiting box 58 is fixedly connected with a counterweight 510. The counterweight 510 provided on the top of the limiting box 58 ensures the strength of the cutting knife 55 when cutting the silicone masterbatch rod. The bottom of the limiting box 58 is provided with a first limiting shaft 56. One end of the first limiting shaft 56 is movable through the outside of the water tank 4 and is provided with a driving device. The driving device is Motor, the first limit shaft 56 is located on the outer wall inside the water tank 4 and is fixedly connected to a cam 57. The cam 57 cooperates with the limit box 58. One end of the bottom of the limit box 58 is fixedly connected to a cutting knife 55. A cutting groove 7 is provided on the outer wall above the screen plate 3. The cutting knife 55 and the cutting groove 7 correspond to each other. The center of the output end of the silicone masterbatch rod has been completely cooled, but the interior of the silicone masterbatch rod except the part near the output end has not been completely cooled. Therefore, only the right side of the cutting knife 55 needs to be cleaned. A force plate 511 is fixedly connected to the side wall of the limit box 58. A replacement mechanism 54 is provided on one side of the cutting knife 55. A limiting mechanism 53 and a transmission mechanism 52 are provided on the top of the replacement mechanism 54.

[0033] In this embodiment, the driving device drives the first limit shaft 56 to rotate, and the first limit shaft 56 drives the limit box 58 to reciprocate. The limit box 58 is limited by the slide rail 59 during the reciprocating motion, and the counterweight block 510 set on the top of the limit box 58 ensures the force of the cutting knife 55 when cutting the silicone masterbatch rod. The cutting knife 55 cuts the silicone masterbatch rod into particles as the limit box 58 reciprocates.

[0034] Example 2:

[0035] The replacement mechanism 54 includes a cleaning rod 541, a movable sleeve 542, a third limiting shaft 543, a thrust spring 544, a mounting plate 545, a cleaning block 546 and a third limiting plate 547. The outer walls on both sides of the movable sleeve 542 are rotatably connected to the third limiting shaft 543 through bearings. One end of the third limiting shaft 543 is fixedly connected to the inner wall of the water tank 4. The inner wall of the movable sleeve 542 is slidably connected to the cleaning rod 541. One end of the cleaning rod 541 is fixedly connected to the mounting plate 545. A cleaning block 546 is arranged on the outer wall of the mounting plate 545. A thrust spring 544 is arranged between the mounting plate 545 and the movable sleeve 542. The thrust spring 544 is sleeved on the outside of the cleaning rod 541. The bottom end of the movable sleeve 542 is provided with a third limiting plate 547.

[0036] The third limiting shaft 543 is located on a side of the movable sleeve 542 away from the cleaning block 546 , the third limiting plate 547 contacts the outer wall of the movable sleeve 542 , and the third limiting plate 547 is fixedly connected to the inner wall of the water tank 4 .

[0037] In this embodiment, the cleaning block 546 in the replacement mechanism 54 can clean the outer wall of the cutting knife 55 to ensure that the cutting effect of the cutting knife 55 is not affected. At the same time, the cleaning block 546 can be replaced from the outer wall of the mounting plate 545.

[0038] Example 3:

[0039] The transmission mechanism 52 includes a first limiting plate 521, a first movement rod 522, a first limiting pin 523, a second limiting plate 524, a thrust plate 525, a hydraulic rod 526 and a second limiting shaft 527. The hydraulic rod 526 is fixedly connected to the equipment frame 6. The output end of the hydraulic rod 526 is fixedly connected to the thrust plate 525. The output end of the hydraulic rod 526 is provided with a first limiting plate 521. The first movement rod 522 is provided on the side of the first limiting plate 521 away from the hydraulic rod 526. The outer wall of the first limiting plate 521 close to the hydraulic rod 526 is rotatably connected to the second limiting shaft 527 through a bearing. Both ends of the second limiting shaft 527 are fixedly connected to the inner wall of the water tank 4. A first limiting sleeve 51 is slidably connected to the outer wall at the top of the first moving rod 522, and the first limiting sleeve 51 is fixedly connected to the inner wall of the water tank 4. The first limiting sleeve 51 limits the first moving rod 522, and a first limiting pin 523 is rotatably connected to the outer wall at the bottom of the first moving rod 522. A second limiting plate 524 is provided on the outer side of the first limiting pin 523, and the bottom end of the second limiting plate 524 is fixedly connected to the movable sleeve 542. Specifically, the distance that the thrust plate 525 moves during the upward contraction of the hydraulic rod 526 is less than the moving distance of the first moving rod 522 on the other side of the first limiting plate 521 because the second limiting shaft 527 is close to one side of the hydraulic rod 526.

[0040] A first slide groove and a second slide groove are provided on the outer wall of the first limit plate 521, and the length of the second slide groove is greater than that of the first slide groove. The outer wall of the output end of the hydraulic rod 526 is movably connected to the first slide groove through a shift rod, and the outer wall of the first motion rod 522 is movably connected to the second slide groove through a shift rod. A third slide groove is provided on the outer wall of the second limit plate 524, and the first limit pin 523 is movably connected to the third slide groove. The third slide groove is V-shaped.

[0041] The distance from the center of the first limiting shaft 56 to the limiting box 58 is greater than the distance between the force plate 511 and the thrust plate 525 , thereby preventing the force plate 511 from colliding with the thrust plate 525 when the limiting box 58 reciprocates.

[0042] Example 4:

[0043] The limiting mechanism 53 includes an inclined plate 531, a movable groove 532, a tension spring 533, a fixed plate 534 and a connecting plate 535. The top of the inclined plate 531 is fixedly connected to the thrust plate 525, and the bottom of the inclined plate 531 is provided with a connecting plate 535. A movable groove 532 is provided on the outer wall of the connecting plate 535. The bottom end of the connecting plate 535 is slidably connected to the fixed plate 534. The fixed plate 534 contacts the outer wall of the movable sleeve 542. The fixed plate 534 and the third limiting plate 547 cooperate with each other to limit the movable sleeve 542 to prevent the cutting knife 55 from driving the position of the cleaning block 546 during the reciprocating motion. The bottom of the inclined panel 531 passes through the movable groove 532 and cooperates with the inclined surface of the fixed plate 534. When the inclined panel 531 rises, the limit of the inclined panel 531 on the fixed plate 534 is released, and the tension spring 533 assists the fixed plate 534 to contract, thereby releasing the limit of the fixed plate 534 on the movable sleeve 542. Both ends of the inclined surface of the fixed plate 534 are fixedly connected with tension springs 533. The two groups of tension springs 533 are respectively located on both sides of the inclined panel 531. One end of the tension spring 533 is fixedly connected to the inner wall of the water tank 4, and the connecting plate 535 is fixedly connected to the inner wall of the water tank 4.

[0044] The first moving rod 522 pushes the first limiting pin 523 downwards to move along the inner wall of the third sliding groove until the thrust plate 525 contacts the force plate 511, and when the thrust plate 525 drives the force plate 511 to move upwards, the first limiting pin 523 moves downwards to move along the inner wall of the third sliding groove until the thrust plate 525 contacts the force plate 511, and when the thrust plate 525 drives the force plate 511 to move upwards, the first limiting pin 523 moves downwards to move along the inner wall of the third sliding groove Move to the turning point of the third slide groove, press one end of the movable sleeve 542, and move the end of the movable sleeve 542 with the cleaning block 546 upward, so that the cleaning block 546 is away from the cutting knife 55, and the cleaning block 546 is rotated to the top, which is convenient for replacing the cleaning block 546. Through the mutual cooperation of the transmission mechanism 52 and the limiting mechanism 53, first release the limit of the fixed plate 534 and the third limiting plate 547 on the movable sleeve 542, and then push one side of the movable sleeve 542 downward through the first movement rod 522, so that the cleaning block 546 is away from the cutting knife 55, and the cleaning block 546 is rotated to the top to avoid puncture when replacing the cleaning block 546. At the same time, the cleaning block 546 moves to the top to improve the convenience of replacing the cleaning block 546.

[0045] The working process and principle of the present invention are as follows:

[0046] The silicone masterbatch rods extruded by the extruder 2 pass through the limiting roller 1 to the screen plate 3. The driving device drives the first limiting shaft 56 to rotate, and the first limiting shaft 56 drives the cam 57 to rotate. The rotation of the cam 57 continuously drives the limiting box 58 to reciprocate, and the limiting box 58 drives the cutting knife 55 to reciprocate to cut the silicone masterbatch rods into particles. The cutting knife 55 is constantly in contact with the cleaning block 546 during the process of cutting the silicone masterbatch rods to clean the adhesions on the cleaning knife, so as to prevent impurities on the cutting knife 55 from affecting the cutting effect of the cutting knife 55 in the later stage.

[0047] When the cleaning block 546 is replaced, the hydraulic rod 526 contracts, and the inclined plate 531 moves up with the hydraulic rod 526, releasing the limit on the fixed plate 534. The fixed plate 534 matched with the inclined plate 531 is quickly reset due to the action of the tension spring 533. At this time, the fixed plate 534 releases the limit on the movable sleeve 542. As the hydraulic rod 526 contracts, one side of the first limiting plate 521 tilts upward, causing one side of the first movement rod 522 on the first limiting plate 521 to push downward, and the first movement rod 522 is pushed downward. The rod 522 pushes the first limit pin 523 downward to move on the inner wall of the third slide groove until the thrust plate 525 and the force plate 511 are in contact, and when the thrust plate 525 drives the force plate 511 to move upward, the first limit pin 523 moves to the turning point of the third slide groove, pressing one end of the movable sleeve 542, so that the end of the movable sleeve 542 with the cleaning block 546 moves upward, so that the cleaning block 546 is away from the cutting knife 55, and the cleaning block 546 is rotated to the top to facilitate the replacement of the cleaning block 546.

[0048] The preferred embodiments of the invention disclosed above are intended only to help illustrate the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An extrusion and pelletizing device for silicone masterbatch for thermoplastic plastics, comprising an extruder (2), a water tank (4) provided at the output end of the extruder (2), a limiting roller (1) provided on one side of the interior of the water tank (4), and a device frame (6) fixedly connected to the top of the water tank (4), characterized in that: A cleaning mechanism (5) is provided at the bottom of the equipment frame (6), and a screen plate (3) is provided at the bottom of the cleaning mechanism (5); the cleaning mechanism (5) comprises a first limiting sleeve (51), a transmission mechanism (52), a limiting mechanism (53), a replacement mechanism (54), a cutting knife (55), a first limiting shaft (56), a cam (57), a limiting box (58), a slide rail (59), a counterweight (510) and a force plate (511); two sets of slide rails (59) are provided on the inner wall of the water tank (4); the inner walls of the two sets of slide rails (59) are slidably connected to the limiting box (58); the top of the limiting box (58) is fixedly connected to the counterweight (510); A first limiting shaft (56) is provided at the bottom of the limiting box (58), one end of the first limiting shaft (56) is movable and extends to the outside of the water tank (4) and is provided with a driving device, the first limiting shaft (56) is located on the outer wall inside the water tank (4) and is fixedly connected to a cam (57), the cam (57) and the limiting box (58) cooperate with each other, one end of the bottom of the limiting box (58) is fixedly connected to a cutting knife (55), a cutting groove (7) is provided on the outer wall above the screen plate (3), the cutting knife (55) and the cutting groove (7) correspond to each other, a force plate (511) is fixedly connected to the side wall of the limiting box (58), the cutting knife (55) A replacement mechanism (54) is provided on one side of the water tank (4), and a limiting mechanism (53) and a transmission mechanism (52) are provided on the top of the replacement mechanism (54); the replacement mechanism (54) comprises a cleaning rod (541), a movable sleeve (542), a third limiting shaft (543), a thrust spring (544), a mounting plate (545), a cleaning block (546) and a third limiting plate (547); the outer walls on both sides of the movable sleeve (542) are rotatably connected to the third limiting shaft (543) through bearings, one end of the third limiting shaft (543) is fixedly connected to the inner wall of the water tank (4), the inner wall of the movable sleeve (542) is slidably connected to the cleaning rod (541), and the cleaning rod (541) is slidably connected to the inner wall of the movable sleeve (542). One end of the cleaning rod (541) is fixedly connected to a mounting plate (545), a cleaning block (546) is provided on the outer wall of the mounting plate (545), a thrust spring (544) is provided between the mounting plate (545) and the movable sleeve (542), the thrust spring (544) is sleeved on the outer side of the cleaning rod (541), and a third limiting plate (547) is provided at the bottom end of the movable sleeve (542); the third limiting shaft (543) is located on a side of the movable sleeve (542) away from the cleaning block (546), the third limiting plate (547) is in contact with the outer wall of the movable sleeve (542), and the third limiting plate (547) is fixedly connected to the inner wall of the water tank (4).

2. The extrusion and pelletizing device for silicone masterbatch for thermoplastic plastics according to claim 1, characterized in that: The transmission mechanism (52) includes a first limiting plate (521), a first moving rod (522), a first limiting pin (523), a second limiting plate (524), a thrust plate (525), a hydraulic rod (526) and a second limiting shaft (527). The hydraulic rod (526) is fixedly connected to the equipment frame (6). The output end of the hydraulic rod (526) is fixedly connected to the thrust plate (525). The output end of the hydraulic rod (526) is provided with a first limiting plate (521). The first moving rod (522) is provided on the side of the first limiting plate (521) away from the hydraulic rod (526). The first limiting plate (521) is close to the hydraulic rod (526). A second limiting shaft (527) is rotatably connected to the outer wall of the hydraulic rod (526) through a bearing, and both ends of the second limiting shaft (527) are fixedly connected to the inner wall of the water tank (4). A first limiting sleeve (51) is slidably connected to the outer wall of the top of the first movement rod (522), and the first limiting sleeve (51) is fixedly connected to the inner wall of the water tank (4). A first limiting pin (523) is rotatably connected to the outer wall of the bottom of the first movement rod (522), and a second limiting plate (524) is provided on the outer side of the first limiting pin (523), and the bottom end of the second limiting plate (524) is fixedly connected to the movable sleeve (542).

3. The extrusion and pelletizing device for silicone masterbatch for thermoplastic plastics according to claim 2, characterized in that: A first slide groove and a second slide groove are provided on the outer wall of the first limit plate (521), and the length of the second slide groove is greater than that of the first slide groove. The outer wall of the output end of the hydraulic rod (526) is movably connected to the first slide groove through a shifting rod, and the outer wall of the first motion rod (522) is movably connected to the second slide groove through a shifting rod. A third slide groove is provided on the outer wall of the second limit plate (524), and the first limit pin (523) is movably connected to the third slide groove. The third slide groove is V-shaped.

4. The extrusion and pelletizing device for silicone masterbatch for thermoplastic plastics according to claim 1, characterized in that: The distance from the center of the first limiting shaft (56) to the limiting box (58) is greater than the distance between the force plate (511) and the thrust plate (525).

5. The extrusion and pelletizing device for silicone masterbatch for thermoplastic plastics according to claim 1, characterized in that: The limiting mechanism (53) includes an inclined plate (531), a movable groove (532), a tension spring (533), a fixed plate (534) and a connecting plate (535). The top of the inclined plate (531) is fixedly connected to the thrust plate (525). The bottom of the inclined plate (531) is provided with a connecting plate (535). The outer wall of the connecting plate (535) is provided with a movable groove (532). The bottom end of the connecting plate (535) is slidably connected to the fixed plate (534). The fixed plate (534) contacts the outer wall of the movable sleeve (542), one side of the fixed plate (534) is an inclined surface, the bottom of the inclined panel (531) passes through the movable groove (532) and cooperates with the inclined surface of the fixed plate (534), both ends of the inclined surface of the fixed plate (534) are fixedly connected to a tension spring (533), one end of the tension spring (533) is fixedly connected to the inner wall of the water tank (4), and the connecting plate (535) is fixedly connected to the inner wall of the water tank (4).

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