Automatic granulator for plastic product processing

Abstract

The invention relates to the technical field of plastic processing, in particular to an automatic granulator for plastic product processing, which comprises an extrusion molding device and a cutting device, a die head for extruding molten plastic is arranged on the extrusion molding device, the cutting device comprises a cutterhead, a blade and an output shaft, the cutterhead is sleeved on the output shaft, the cutterhead drives the output shaft to rotate through a motor, and the output shaft is driven by the motor to rotate. And the blades are circumferentially arrayed on the outer edge of the cutter head. Circulating cooling water and a clamping assembly are arranged in the cutterhead, and the non-working part of the blade is directly immersed in the circulating cooling water, so that the constant temperature of the blade after long-time pelletizing is ensured, and the adhesion phenomenon in the pelletizing process is avoided; meanwhile, as the displacement of the adjusting bolt screwed into the through hole reaches a set value, the blade can be fixed in the cutter head while the mounting position of the blade is sealed by the cover plate, so that the constant gap between the blade and the die head is ensured, and the pelletizing quality of the pelletizer is further ensured.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing, in particular to an automatic granulator for processing plastic products. Background Art

[0002] Low-temperature plastic automatic granulator is a device that reprocesses plastic waste into granular plastic. It is mainly used for plastic recycling and reuse. The granulator is the key part of the granulator. The granulator is usually located at the end of the granulator. Its main working principle is to pass the molten plastic strips that have been pressurized and filtered by the extruder through multiple flow channels of the die head and then enter the cooling water tank in the form of strips for cooling and shaping. Subsequently, the traction roller of the granulator bites the plastic strips and simultaneously sends them into the knife chamber of the granulator. In the knife chamber, the high-speed rotating cutter cuts the plastic strips into small particles, thus completing the entire granulation process. Since the scraper cuts the molten plastic continuously during the production process of the granulator, and the molten plastic is in a high temperature state, the temperature of the scraper will rise after working for a long time, which makes the temperature of the plastic insufficient to drop after it is extruded and contacts the scraper. Part of the plastic is still in a molten state, and the scraper with rising temperature is easy to contact with the plastic pellets that are not fully hardened and adhere to them. When adhesion occurs, it will block the subsequent plastic extruded from the die head, thereby affecting the production rhythm and output quality, and may cause excessive load on the equipment driving the cutter, resulting in equipment damage.

[0003] In view of the above problems, the prior art provides some solutions. For example, the invention patent with patent application number CN202210470134.4 provides a scraper assembly for a plastic special material granulator. The solution is through a granulating scraper installed on the side wall of the scraper seat, a mounting ring groove is provided on the outer side of the scraper seat, a water changing ring is rotatably provided in the mounting ring groove, a water inlet groove is provided on the inner side of the water changing ring, a water inlet pipe is provided on the outer side of the water changing ring, a water outlet groove is provided on the inner side of the water changing ring, a water outlet pipe is provided on the outer side of the water changing ring, and the back of the granulating scraper is bent. A water cooling pipe is provided, the water inlet end of the water cooling pipe is connected to the water inlet trough, and the water outlet end of the water cooling pipe is connected to the water outlet trough. When the cooling water flows in the water cooling pipe, the granulating scraper can be cooled. In this way, when the granulating scraper is used to scrape the material extruded from the granulating die, the material can be quickly cooled, making it difficult for the material to adhere to the surface of the granulating scraper, so that the production capacity of special plastic materials is not easily affected. However, compared with ordinary blades, the blade in this solution needs to have a communicating groove inside it, and the blade is not applicable and has a high cost. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic granulator for processing plastic products, so as to solve the problem that the temperature of the scraper rises after long-term operation, resulting in insufficient temperature drop of the plastic after extrusion and contact with the scraper, part of the plastic is still in a molten state, and the scraper with increased temperature is easy to contact and adhere to the plastic pellets that are not completely hardened. In addition, it is difficult to adjust the angle and position of the new blade to a certain extent while ensuring sealing after installation when using water cooling. When the above problems occur during the pelletizing process, it is easy to affect the production rhythm and output quality, while solving the shortcomings of the existing technical solutions.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The cutter head is fixed on the cutter head, and the motor drives the output shaft to rotate. The cutter head is hollow and the end face of the cutter head is also provided with a cover plate, a sealing ring and an adjusting bolt. The non-cutting end of the blade is inserted into the cutter head, and the sealing ring is installed at the connection between the cutter head and the blade and abuts against the cover plate. The cutter head and the cover plate are provided with through holes, and the through holes are provided with internal threads that cooperate with the adjusting bolts. The cover plate is sleeved on the blade and is sealed with the cutter head by the adjusting bolts. The cutter head is provided with cooling circulating water and a clamping assembly, and the clamping assembly includes two clamping plates. The clamping assembly realizes the fixing of the two sides of the blade and the adjustment of the angle of the clamping plate by the tightening displacement of the two adjusting bolts.

[0007] It is easy to understand that as the motor starts and drives the output shaft to rotate, the cutter disc fixedly connected to the output shaft rotates, and the blade is fixedly connected to the cutter disc. As the cutter disc rotates, the cooling circulating water in it is subjected to centrifugal force and is thrown onto the inner edge wall of the cutter disc. It contacts the blade so that the cooling circulating water takes away the heat generated by the blade, thereby ensuring the constant working temperature of the blade and avoiding the occurrence of plastic adhesion. At the same time, the cover plate is installed at the connection between the cutter disc and the blade and tightened by adjusting bolts and nuts. As the displacement of the adjusting bolts into the through holes reaches the set value, the blade installation is sealed while the blade can also be fixed in the cutter disc. As the displacement of the adjusting bolts on both sides into the through holes is different, the blade is clamped at different positions, so that the blade can be adjusted to a certain position and angle while ensuring sealing. This ensures that the gap between the blade and the die head is at the optimal distance while avoiding the high equipment maintenance cost caused by the use of special water-cooled blades, thereby ensuring that the use of ordinary blades with lower costs can achieve the same cutting effect on the material.

[0008] The cam is connected to the guide rails on both sides of the blade, and the guide rails are arranged in a rectangular array around the blade, the guide rails are in a "V" shape, and the tail of the guide rails is parallel to the blade, the clamping block is slidably connected to the guide rails on the upper and lower sides, and the clamping plate is slidably connected to the guide rails on the left and right sides, and the clamping block and the clamping plate are elastically connected to the inner wall of the blade, and the two adjusting bolts are symmetrical along the center line of the blade, and the connecting rods, which are 2 in number, are hinged to the clamping block and the clamping plate on one side of the blade respectively. The adjusting bolt includes an inner bolt and an outer bolt, the outer bolt abuts the connecting rod, and the inner bolt is threadedly connected to the inside of the outer bolt. Axial adjustment parts are also provided in the clamping plates on both sides, and the outer bolt abuts the axial adjustment part. Radial adjustment parts are also provided in the guide rails on the upper and lower sides, and the radial adjustment assembly and the axial adjustment part both abut against the blade.

[0009] It is easy to understand that the staff uses a tool to rotate the nuts on both sides of the cover plate counterclockwise so that the cover plate cannot squeeze the sealing ring. After the staff removes the cover plate, the staff uses a tool to rotate the outer bolt counterclockwise until the adjusting bolt is completely removed from the through hole. During the above-mentioned removal process, the connecting rod is no longer squeezed by the outer bolt. The connecting rod is pulled by the spring and moves in the direction of the outer bolt. Since the connecting rod, the clamping block and the splint are hinged, as the connecting rod moves, the clamping block and the splint move along the path of the guide rail in the direction away from the blade, so that the clamping block and the splint are no longer clamped with the blade, thereby easily pulling out the blade; the staff puts the sealing ring on the blade and inserts it into the cutter disc. After the cover plate squeezes the sealing ring, the staff reinserts the outer bolt into the through hole. , and tighten the nut, so that the cover plate is clamped to the end face of the cutter disc. As the adjusting bolt is further screwed in, the outer bolt begins to abut against the connecting rod and moves toward the direction of the motor. Since the connecting rod is hinged to the clamping plate and the clamping block respectively, as the connecting rod moves, the clamping block and the clamping plate move along the path of the guide rail toward the direction close to the blade. In order to ensure the sealing of the cover plate, the adjusting bolts on both sides are installed in a way that they are screwed in alternately, and the connecting rod on one side only controls a single clamping plate and clamping block. As the adjusting bolts on both sides are screwed in alternately, the clamping block and the clamping plate are clamped to the blade, thereby achieving the two adjusting screws to fix the position of the blade around while ensuring the sealing of the sealing ring, thereby avoiding the vibration of the sealing ring due to the cutting of the blade and causing the sealing to decrease, thereby ensuring the uniformity of the material cut out by the granulator.

[0010] Preferably, the radial adjustment member includes a pressure block, which is elastically connected to the tail of the guide rail, and the clamping block is provided with a convex circle toward the pressure block, and the pressure block is provided with an inclined surface matching the convex circle, and the pressure block abuts against the blade.

[0011] It is easy to understand that after the new blade is installed, it needs to be adjusted to achieve the best cutting effect. The blade can only be fixed by screwing the adjustment screws on both sides into the set displacement. By loosening the outer bolt on one side and screwing in the outer bolt on the other side, the pressure block squeezes the blade in one direction, causing the blade to tilt radially. In this way, the two adjusting screws can adjust the radial angle of the blade while ensuring the sealing of the sealing ring. This avoids the adhesion of materials due to incorrect angles between the blade and the die head, and ensures the uniformity of the material cut out by the granulator.

[0012] Preferably, the axial adjustment member includes a pressure pad and a pressing block, the pressure pad is provided with a movable pin and a boss, the splint is provided with a movable hole and a slide groove, the movable pin passes through the movable hole and is elastically connected to the splint, the boss is slidably connected to the slide groove, the connecting rod and the splint are elastically connected with a pressing block, the inner bolt abuts against the pressing block on the connecting rod, the pressing block on the splint abuts against the boss, and the abutting surfaces of the pressure pad and the blade are provided with anti-slip grooves that cooperate with each other.

[0013] It is easy to understand that the newly installed blade needs to be adjusted to a certain extent according to the working conditions to achieve the best cutting effect. The blade can only be fixed by screwing the adjusting screws on both sides into the displacement of the set value. By loosening the outer bolt on one side and further screwing in the inner bolt on the other side, the blade is tilted axially. After the adjustment is completed, tighten the outer bolt on the side that was originally loosened and tighten the nuts on both sides. In this way, the two adjusting screws can adjust the axial angle of the blade while ensuring the sealing of the sealing ring. This avoids the adhesion of materials due to incorrect angles between the blade and the die head, and ensures the uniformity of the material cut out by the granulator.

[0014] Preferably, the anti-slip grooves on the pressure pad fill the anti-slip grooves on the blade, and the anti-slip grooves on the blade include horizontal grooves, vertical grooves and circular grooves. The horizontal grooves intersect the vertical grooves perpendicularly, and the circular grooves are opened at the intersection of the horizontal grooves and the vertical grooves. The anti-slip grooves on the pressure pad are arranged in a radial array along the installation direction of the blade, and the edges of the anti-slip grooves are rounded.

[0015] It is easy to understand that by providing anti-slip patterns consisting of transverse grooves and vertical grooves on the rear half of the blade, and providing a circular groove between the intersection of the transverse grooves and the vertical grooves, when the pressure pads on both sides clamp the blade, the anti-slip patterns on the pressure pad and the blade are embedded in each other, and the non-anti-slip patterns on the pressure pad and the blade are rigidly connected. While ensuring the strength of the connection, the friction force of the blade after being clamped by the pressure pad is further increased due to the rubber. Since the blade needs to be adjusted to a certain position and angle during installation, the anti-slip patterns on the pressure pad and the blade may not be completely embedded. By setting rounded corners on the edges of the anti-slip patterns and the rubber having a certain elastic deformation, the anti-slip patterns on the pressure pad and the blade can still be deformed due to the extrusion pressure after interlacing, and the embedding between the anti-slip patterns is ensured by the guidance of the rounded corners, further ensuring the clamping effect of the clamping assembly on the blade when the centrifugal force is too large.

[0016] Preferably, the tail portion of the guide rail is open.

[0017] It is easy to understand that by setting the tail of the guide rail to be open, when the parts in the clamping assembly need to be replaced and maintained, the staff can further tighten the outer bolts to directly remove the clamp block and the clamp plate and the parts adjacent to the two from the guide rail, thereby reducing the difficulty of maintenance of the equipment.

[0018] Preferably, the splint is further provided with a counterweight portion, which is arranged at the lower left corner of the non-contact surface of the splint, and the counterweight portion is "waist-shaped" with the inner concave part of the "waist-shaped" facing the lower left corner of the splint.

[0019] It is easy to understand that in order to prevent the blade from being swung out of the cutter disc due to centrifugal force, so that the distance between the blade and the die head may not be stable after work, resulting in uneven cut plastic pellets, a "waist-shaped" counterweight is set at the upper left corner of the splint. When the cutter disc rotates, the center of gravity of the splint is offset due to the setting of the counterweight. At the same time, the "waist-shaped" structure hinders the flow of cooling circulating water, causing the splint to be subjected to a force in the opposite direction to the force direction of the blade when the cutter disc rotates. When the blade moves out of the cutter disc due to centrifugal force, the counterweight changes the center of gravity of the splint. The splint is able to push the blade toward the direction of the pressing block while following the rotation of the blade, thereby offsetting the centrifugal force on the blade, thereby ensuring the fixed position of the blade, and then ensuring the uniformity of the material cut out by the granulator.

[0020] Preferably, the guide rail is inclined toward the blade.

[0021] It is easy to understand that by setting the guide rail to be inclined toward the blade, the position where the blade needs to be fixed is shortened, thereby reducing the length of the non-working area of ​​the blade. Since the blade is a consumable part, by reducing the length of the non-working area of ​​the blade, the cost of the blade is reduced, thereby reducing the maintenance cost of the equipment.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention arranges circulating cooling water and a clamping assembly inside the cutter disc, and directly immerses the non-working part of the blade in the circulating cooling water, thereby ensuring that the temperature of the blade is stable after a long period of pelletizing, thereby avoiding the occurrence of sticking during the pelletizing process; at the same time, the cover plate and the sealing ring are installed at the connection between the cutter disc and the blade and tightened by adjusting bolts and nuts. As the displacement of the adjusting bolt into the through hole reaches the set value, the installation position of the blade is sealed and the blade can also be fixed in the cutter disc, thereby ensuring a constant gap between the blade and the die head, and further ensuring that the use of ordinary blades can also avoid the occurrence of sticking.

[0024] 2. The present invention provides a pressure block and a pressure pad, and fixes the blade by screwing the adjustment screws on both sides into the displacement of the set value. At the same time, by loosening the outer bolt on one side and screwing in the outer bolt on the other side, the pressure block unidirectionally squeezes the blade, causing the blade to be radially tilted; by loosening the outer bolt on one side and further screwing in the inner bolt on the other side, the blade is axially tilted. After the adjustment is completed, the outer bolt on one side is tightened and the nuts on both sides are tightened, thereby realizing the adjustment of various angles of the blade by two adjusting screws, while reducing the complexity of the components and meeting the installation requirements for blade adjustment.

[0025] 3. The present invention enhances friction by arranging mutually interlocking anti-skid grooves on the blade and the pressure pad, thereby ensuring that the blade will not deviate after being clamped by the pressure pad. When the installation angle and position of the blade change, the anti-skid grooves can still ensure that the pressure pad is fully fitted to the blade through the deformation of the rubber and the matching margin between the movable groove and the movable hole, further ensuring the clamping effect of the clamping assembly when the blade is in use.

[0026] 4. The present invention shortens the position where the blade needs to be fixed by tilting the guide rail toward the blade, thereby further reducing the length of the non-working area of ​​the blade. Since the blade is a consumable part, by reducing the length of the non-working area of ​​the blade, the cost of the blade is reduced, thereby reducing the maintenance cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the automatic granulator for processing plastic products of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the clamping assembly in the cutter head after the blade is installed;

[0029] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0030] Figure 4 for Figure 2 A top view of

[0031] Figure 5 for Figure 4 Full cross-section of the middle BB;

[0032] Figure 6 It is a structural diagram of the working end face of the cutter head;

[0033] Figure 7 Schematic diagram of the structure of the connecting rod and the boss.

[0034] Figure: 1, extrusion device; 101, die head; 2, cutting device; 201, cutter head; 202, blade; 203, motor; 204, output shaft; 3, clamping assembly; 301, cover plate; 302, adjusting bolt; 3021, inner bolt; 3022, outer bolt; 3023, nut; 303, clamping plate; 3031, movable hole; 3032, slide; 3033, counterweight; 3 04, sealing ring; 305, guide rail; 306, clamping block; 3061, convex circle; 307, connecting rod; 4, through hole; 5, radial adjustment member; 501, pressure block; 5011, inclined plane; 6, axial adjustment member; 601, pressure pad; 602, movable pin; 603, boss; 604, pressing block; 7, anti-slip groove; 701, horizontal groove; 702, vertical groove; 703, circular groove; 704, rounded corner. DETAILED DESCRIPTION

[0035] The present invention provides an automatic granulator for processing plastic products, and the technical solution is as follows:

[0036] See also Figures 1 to 7, an automatic granulator for processing plastic products, specifically, includes an extruder 1 and a cutting device 2, the extruder 1 is provided with a die head 101 for extruding molten plastic, the cutting device 2 includes a cutter disc 201, a blade 202 and an output shaft 204, the cutter disc 201 is fixedly connected to the output shaft 204, the cutter disc 201 is concentric with the die head 101, the motor 203 drives the output shaft 204 to rotate, the cutter disc 201 is a hollow structure, the end face of the cutter disc 201 is also provided with a cover plate 301, a sealing ring 304 and an adjusting bolt 302, the non-cutting end of the blade 202 is inserted into the cutter disc 201, and the sealing ring 3 04 is installed at the connection between the cutter disc 201 and the blade 202 and abuts against the cover plate 301. A through hole 4 is provided on the cutter disc 201 and the cover plate 301. The through hole 4 is provided with an internal thread that cooperates with the adjusting bolt 302. The cover plate 301 is sleeved on the blade 202 and is sealed with the cutter disc 201 through the adjusting bolt 302. The cutter disc 201 is provided with cooling circulating water and a clamping assembly 3. The clamping assembly 3 includes two clamping plates 303. The clamping assembly 3 realizes the fixation of the two sides of the blade 202 by the clamping plates 303 and the adjustment of the angle through the tightening displacement of the two adjusting bolts 302.

[0037] See also Figures 1 to 7The clamping assembly 3 includes a nut 3023, a guide rail 305, a clamping block 306 and a connecting rod 307. The nut 3023 is concentric with the through hole 4 and is installed on the end surface of the cover plate 301. The guide rail 305 is arranged in the cutter head 201 and is arranged in a rectangular array around the blade 202. The guide rail 305 is "V" shaped and the tail of the guide rail 305 is parallel to the blade 202. The tail of the guide rail 305 is open, and the guide rail 305 is inclined toward the blade 202. The clamping block 306 is slidably connected to the upper and lower guide rails 305, and the splint 303 is slidably connected to the left and right guide rails 305. A counterweight portion 3033 is also provided on the splint 303. The counterweight portion 3033 is arranged at the lower left corner of the non-abutting surface of the splint 303. 3033 is in the shape of a waist and the inner concave part of the waist is toward the lower left corner of the splint 303. The clamping block 306 and the splint 303 are elastically connected to the inner wall of the cutter disc 201. The two adjusting bolts 302 are symmetrical along the center line of the blade 202. The connecting rods 307 of number 2 are respectively hinged to the clamping block 306 and the splint 303 on one side of the blade 202. The adjusting bolt 302 includes an inner bolt 3021 and an outer bolt 3022. The outer bolt 3022 abuts against the connecting rod 307. The inner bolt 3021 is threadedly connected to the inner part of the outer bolt 3022. Axial adjustment parts 6 are also provided in the splints 303 on both sides. The axial adjustment parts 6 include a pressure pad 601 and a pressing block 604. The pressure pad 601 is provided with a movable pin 602 and a boss 603. The splint 303 is provided with a movable hole 3031 and a slide groove 3032, the movable pin 602 passes through the movable hole 3031 and is elastically connected to the splint 303, the boss 603 is slidably connected to the slide groove 3032, the connecting rod 307 and the splint 303 are elastically connected with a pressing block 604, the inner bolt 3021 abuts against the pressing block 604 on the connecting rod 307, the pressing block 604 on the splint 303 abuts against the boss 603, and the abutting surface of the pressure pad 601 and the blade 202 are provided with mutually matching anti-slip grooves 7, the anti-slip grooves 7 on the pressure pad 601 fill the anti-slip grooves 7 on the blade 202, and the anti-slip grooves 7 on the blade 202 include horizontal grooves 701, vertical grooves 702 and circular grooves 703, and the horizontal grooves 701 and the vertical grooves 702 intersect vertically, the circular groove 703 is opened at the intersection of the horizontal groove 701 and the vertical groove 702, the anti-slip groove 7 on the pressure pad 601 is arranged in a radial array along the installation direction of the blade 202, and the edge of the anti-slip groove 7 is provided with a rounded corner 704, the outer bolt 3022 is in contact with the axial adjustment member 6, and a radial adjustment member 5 is also provided in the upper and lower guide rails 305. The radial adjustment member 5 includes a pressure block 501, which is elastically connected to the tail of the upper and lower guide rails 305. The clamping block 306 is provided with a convex circle 3061 in the direction of the pressure block 501, and the pressure block 501 is provided with an inclined surface 5011 that matches the convex circle 3061. The pressure block 501 is in contact with the blade 202, and both the radial adjustment member 5 and the axial adjustment member 6 are in contact with the blade 202.

[0038] See also Figures 1 to 7When the granulator is in use, the operator starts the motor 203 to drive the output shaft 204 to rotate, and the cutter disc 201 fixedly connected to the output shaft 204 rotates. As the molten plastic is extruded from the die head 101, the cutter disc 201 drives the blade 202 to rotate, so as to cut the material extruded from the granulator die head 101. As the granulator works for a long time, the temperature of the blade 202 gradually rises due to continuous cutting, making it impossible for the extruded plastic to reach the hardening temperature, which in turn causes the molten plastic and the subsequently extruded plastic to adhere to the gap between the die head 101 and the cutter disc 201, thereby affecting production quality.

[0039] As the motor 203 starts and drives the output shaft 204 to rotate, the cutter disc 201 fixedly connected to the output shaft 204 rotates, and the blade 202 is fixedly connected to the cutter disc 201. As the cutter disc 201 rotates, the cooling circulating water inside it is subjected to centrifugal force and is thrown onto the inner edge wall of the cutter disc 201, and contacts the blade 202 so that the cooling circulating water takes away the heat generated on the blade 202, thereby ensuring the constant working temperature of the blade 202 and avoiding the occurrence of plastic adhesion.

[0040] When replacing and installing the blade 202, the staff uses a tool to rotate the nuts 3023 on both sides of the cover plate 301 counterclockwise, so that the cover plate 301 cannot squeeze the sealing ring 304. After the cover plate 301 is removed, the staff uses a tool to rotate the outer bolt 3022 counterclockwise until the adjusting bolt 302 is completely removed from the through hole 4. During the above-mentioned removal process, the connecting rod 307 is no longer squeezed by the outer bolt 3022. The connecting rod 307 is pulled by the spring and moves in the direction of the outer bolt 3022. Since the connecting rod 307, the clamping block 306 and the clamping plate 303 are hinged The cam 3022 is pressed against the cam 304 and the cam 303 is tightened to the cam 304. The cam 3022 is then tightened to the cam 304. The cam 3022 is then tightened to the cam 304. The cam 306 is in contact with the connecting rod 307 and moves toward the motor 203. Since the connecting rod 307 is hinged to the clamping plate 303 and the clamping block 306 respectively, as the connecting rod 307 moves, the clamping block 306 and the clamping plate 303 move along the path of the guide rail 305 toward the direction close to the blade 202. In order to ensure the sealing of the cover 301, the adjusting bolts 302 on both sides are installed in an alternate manner, and the connecting rod 307 on one side only controls a single clamping plate 303 and clamping block 306. As the adjusting bolts 302 on both sides are alternately screwed in, the clamping block 306 and the clamping plate 303 are clamped to the blade 202. By setting the guide rail 305 toward the blade The guide rail 305 is tilted in the direction of 202, thereby shortening the position where the blade 202 needs to be fixed, thereby reducing the length of the non-working area of ​​the blade 202. Since the blade 202 is a consumable part, by reducing the length of the non-working area of ​​the blade 202, the cost of the blade 202 is reduced, thereby reducing the maintenance cost of the equipment. By setting the tail of the guide rail 305 to be open, when the parts in the clamping assembly 3 need to be replaced and maintained, the staff can further tighten the outer bolt 3032 to directly remove the clamp block 306 and the clamp plate 303 and the components connected to the two from the guide rail 305, thereby reducing the difficulty of maintenance of the equipment.

[0041] When the blade 202 is fully inserted into the cutter head 201, if it needs to be adjusted forward and backward, the staff will loosen the nut 3023, thereby unscrewing the outer bolt 3022 toward the outside of the cutter head 201, so that the clamping block 306 and the clamping plate 303 move along the path of the guide rail 305 in the direction away from the blade 202, and the blade 202 is no longer clamped. As the blade 202 is pulled outward by 1 mm, the staff will restore the above steps to achieve the adjustment of the forward and backward movement of the blade 202. When the blade 202 is adjusted forward and backward, if it needs to be adjusted in the axial direction, taking the working end face of the cutter head 201 to offset the blade 202 to the left as an example, the staff will unscrew the outer bolt 3022 on the right side toward the outside of the cutter head 201 by a certain distance, and screw the inner bolt 3021 on the left side toward the through hole 4, so that the inner bolt 3021 is aligned with the When the cam 302 is in the closed position, the spring 3032 is released and the spring 3033 is released, and the cam 302 is in the closed position, and the spring 3033 is released, so that the cam 302 is released and the spring 3033 is released.After the blade 202 is adjusted in the axial direction, if radial adjustment is required, taking the blade 202 being offset upward on the working end face of the cutter head 201 as an example, the staff will screw the adjusting bolt 302 on the right side counterclockwise for a distance, so that the clamping block 306 and the clamping plate 303 controlled by the adjusting bolt 302 on the right side are pulled by the spring and move along the guide rail 305 in the direction away from the blade 202. While releasing the fixation of the blade 202, the outer bolt 3022 on the left side is further screwed into the through hole 4. Because of the path of the guide rail 305, the clamping block 306 and the blade 202 are in a stable state. After the blade 202 abuts against the guide rail 305, the force exerted by the clamping block 306 on the blade 202 remains unchanged. As the outer bolt 3022 is screwed in further, the convex circle 3061 on the clamping block 306 presses the inclined surface 5011 on the pressure block 501, so that the pressure block 501 resists the thrust of the spring and presses toward the blade 202. After determining the radial angle of the blade 202, the staff screws in the outer bolt 3022 on the right side that was originally screwed out of the through hole 4 for a distance until the corresponding clamping block 306 and the clamping plate 303 abut against the blade 202 again. As the cutter disc 201 rotates, the cooling circulating water in the cutter disc 201 is swung toward the outer edge of the cutter disc 201 by the centrifugal force, and the blade 202 is also swung toward the outside of the cutter disc 201 by the centrifugal force, so that the distance between the blade 202 and the die head 101 may not be kept stable after work, resulting in uneven cut plastic particles. By providing a "waist-shaped" counterweight portion 3033 on the splint 303, when the cutter disc 201 rotates, the center of gravity of the splint 303 is offset toward the lower left corner due to the provision of the counterweight portion 3033, and at the same time, the inner concave surface of the "waist-shaped" structure prevents The clamping plate 303 obstructs the flow of the cooling circulating water. Under the above dual effects, the clamping plate 303 is subjected to a force in the opposite direction to the force applied to the blade 202 as it rotates with the cutter disc 201. When the blade 202 moves outward from the cutter disc 201 due to centrifugal force, the counterweight 3033 causes the center of gravity of the clamping plate 303 to change. As the clamping plate 303 rotates with the blade 201, it pushes the blade 202 toward the briquetting direction, thereby offsetting the centrifugal force applied to the blade 202. This ensures that the fixed position of the blade 202 remains constant during operation, thereby ensuring the uniformity of the material cut out by the granulator.

[0042] By providing an anti-skid pattern 7 consisting of a transverse groove 701 and a vertical groove 702 on the rear half of the blade 202, and providing a circular groove 703 between the intersection of the transverse groove 701 and the vertical groove 702, when the pressure pads 601 on both sides clamp the blade 202, the anti-skid patterns 7 on the pressure pad 601 and the blade 202 are embedded in each other, and the non-anti-skid patterns 7 on the pressure pad 601 and the blade 202 are rigidly connected, while ensuring the strength of the connection, the friction force of the blade 202 after being clamped by the pressure pad 601 is reduced due to the rubber. One step larger, since the blade 202 needs to be adjusted to a certain position and angle during installation, the anti-slip groove 7 on the pressure pad 601 and the blade 202 may not be completely fitted together. By setting a rounded corner 704 on the edge of the anti-slip groove 7, and the rubber has a certain elastic deformation, the anti-slip groove 7 on the pressure pad 601 and the blade 202 can still be deformed due to the extrusion force after being staggered, and the fitting between the anti-slip grooves 7 is ensured by the guidance of the rounded corner 704, thereby ensuring the clamping effect of the blade 202.

[0043] A specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiment described above. For those skilled in the art, various changes, modifications, substitutions, and variations to these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. An automatic granulator for processing plastic products, characterized in that: The invention comprises an extrusion device (1) and a cutting device (2), wherein the extrusion device (1) is provided with a die head (101) for extruding molten plastic, and the cutting device (2) comprises a cutter disc (201), a blade (202) and an output shaft (204), wherein the cutter disc (201) is fixedly connected to the output shaft (204), the cutter disc (201) is concentric with the die head (101), and the motor (203) drives the output shaft (204) to rotate, and the cutter disc (201) is a hollow structure, and the end face of the cutter disc (201) is further provided with a cover plate (301), a sealing ring (304) and an adjusting bolt (302), the non-cutting end of the blade (202) is inserted into the cutter disc (201), and the sealing ring (304) is installed on the cutter disc (201). The connection between the cutter disc (201) and the blade (202) is in contact with the cover plate (301); a through hole (4) is provided on the cutter disc (201) and the cover plate (301); an internal thread matching the adjusting bolt (302) is provided in the through hole (4); the cover plate (301) is sleeved on the blade (202) and is sealed with the cutter disc (201) through the adjusting bolt (302); cooling circulating water and a clamping assembly (3) are provided in the cutter disc (201); the clamping assembly (3) includes two clamping plates (303); the clamping assembly (3) fixes the two sides of the blade (202) and adjusts the angle of the clamping plates (303) by the tightening displacement of the two adjusting bolts (302).

2. The automatic granulator for processing plastic products according to claim 1, characterized in that: The clamping assembly (3) includes a nut (3023), a guide rail (305), a clamping block (306) and a connecting rod (307). The nut (3023) is concentric with the through hole (4) and is installed on the end face of the cover plate (301). The guide rail (305) is arranged in the cutter disc (201) and is arranged in a rectangular array around the blade (202). The guide rail (305) is in a "V" shape and the tail of the guide rail (305) is parallel to the blade (202). The clamping block (306) is slidably connected to the guide rails (305) on the upper and lower sides. The clamping plate (303) is slidably connected to the guide rails (305) on the left and right sides. The clamping block (306) and the clamping plate (303) are elastically connected to the inner wall of the cutter disc (201). The two adjusting bolts ( 302) is symmetrical along the center line of the blade (202), and the two connecting rods (307) are hinged to the clamping block (306) and the clamping plate (303) on one side of the blade (202), respectively. The adjusting bolt (302) includes an inner bolt (3021) and an outer bolt (3022), and the outer bolt (3022) abuts against the connecting rod (307). The inner bolt (3021) is threadedly connected to the inside of the outer bolt (3022). Axial adjusting parts (6) are also provided in the clamping plates (303) on both sides, and the outer bolt (3022) abuts against the axial adjusting parts (6). Radial adjusting parts (5) are also provided in the guide rails (305) on the upper and lower sides, and the radial adjusting assembly and the axial adjusting part (6) both abut against the blade (202).

3. The automatic granulator for processing plastic products according to claim 2, characterized in that: The radial adjustment member (5) includes a pressing block (501), the pressing block (501) is elastically connected to the tail of the guide rail (305) on the upper and lower sides, the clamping block (306) is provided with a convex circle (3061) in the direction toward the pressing block (501), and the pressing block (501) is provided with an inclined surface (5011) that matches the convex circle (3061), and the pressing block (501) is in contact with the blade (202).

4. The automatic granulator for processing plastic products according to claim 2, characterized in that: The axial adjustment member (6) includes a pressure pad (601) and a pressing block (604), the pressure pad (601) is provided with a movable pin (602) and a boss (603), the clamping plate (303) is provided with a movable hole (3031) and a slide groove (3032), the movable pin (602) passes through the movable hole (3031) and is elastically connected to the clamping plate (303), the boss (603) and the slide groove (3032) are elastically connected to each other, and the movable pin (602) passes through the movable hole (3031) and is elastically connected to the clamping plate (303). ) are slidably connected, the connecting rod (307) and the splint (303) are elastically connected with a pressing block (604), the inner bolt (3021) abuts against the pressing block (604) on the connecting rod (307), the pressing block (604) on the splint (303) abuts against the boss (603), and the abutting surfaces of the pressure pad (601) and the blade (202) are provided with mutually cooperating anti-slip grooves (7).

5. The automatic granulator for processing plastic products according to claim 4, characterized in that: The anti-slip grooves (7) on the pressure pad (601) fill the anti-slip grooves (7) on the blade (202); the anti-slip grooves (7) on the blade (202) include a transverse groove (701), a vertical groove (702) and a circular groove (703); the transverse groove (701) and the vertical groove (702) intersect vertically; the circular groove (703) is opened at the intersection of the transverse groove (701) and the vertical groove (702); the anti-slip grooves (7) on the pressure pad (601) are arranged in a radial array along the installation direction of the blade (202); and the edges of the anti-slip grooves (7) are provided with rounded corners (704).

6. The automatic granulator for processing plastic products according to claim 2, characterized in that: The tail of the guide rail (305) is open.

7. The automatic granulator for processing plastic products according to claim 2, characterized in that: The splint (303) is further provided with a counterweight portion (3033), which is arranged at the lower left corner of the non-contact surface of the splint (303). The counterweight portion (3033) is "waist-shaped" and the inner concave part of the "waist-shaped" faces the lower left corner of the splint (303).

8. The automatic granulator for processing plastic products according to claim 2, characterized in that: The guide rail (305) is inclined toward the blade (202).

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