A pelletizer

Abstract

The present invention discloses a pelletizer, belonging to the field of plastic pellet preparation, which includes an extrusion device, a water-cooling tank and a pelletizing assembly. The extrusion device includes a bracket, on which an extrusion barrel is provided. An extrusion motor is provided at one end of the extrusion barrel, and an extrusion head is provided at the lower part of the other end of the extrusion barrel. The water-cooling tank is arranged below the extrusion head, and guide rails are fixedly connected to the outer walls on both sides of the water-cooling tank. A lifting assembly is further provided at the lower part of the water-cooling tank. The pelletizing assembly includes a sliding seat, and sliders slidingly connected to the guide rails are provided on both sides of the sliding seat. A support frame is provided on the upper part of the sliding seat. The front end of the support frame is hinged to the sliding seat, and a hydraulic cylinder is provided at the rear end of the support frame. A driving pelletizing roller and a driven pelletizing roller are arranged in the support frame, and a number of corresponding pelletizing knives are provided on both the driving pelletizing roller and the driven pelletizing roller. The present invention utilizes the lifting assembly and the sliding pelletizing assembly to integrate extrusion granulation and hot cutting granulation into one machine, reducing the production cost of enterprises.

Description

Technical Field

[0001] The present invention belongs to the field of plastic pellet preparation, and particularly relates to a pelletizer. Background Art

[0002] At present, plastic pelletizing processes often adopt two processes: cold cutting method and hot cutting method. In the cold cutting method, through a single-stage or two-stage extruder, the plastic is melted and extruded into strips through an extrusion head, and then the strips are cooled and solidified by a water cooling tank before pelletizing; the equipment and tools required for this pelletizing method are relatively simple, and the strips are washed while being cooled by the water cooling tank, reducing the dust pollution during plastic pelletizing.

[0003] In the hot cutting method, a rotating cutting knife is attached to the die plate of the machine head to directly cut the extruded melt into pellets. In order to prevent the pellets from sticking, a cooling water tank also needs to be arranged at the lower part of the pelletizer so that the cut pellets fall into the water tank for rapid cooling and forming.

[0004] Plastics with different characteristics can choose the above two pelletizing processes for granulation according to their own characteristics. For enterprises, in order to expand the production range of products, different pelletizers need to be purchased, increasing the production cost of enterprises. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a pelletizer that integrates extrusion granulation and hot cutting granulation, reducing the production cost of enterprises.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is:

[0007] A granulator, comprising an extrusion device, a water cooling tank and a granulation assembly. The extrusion device includes a bracket, on which an extrusion barrel is provided. At the upper part of the extrusion barrel, a feed bin is provided. Inside the extrusion barrel, a rotating shaft is provided, and a spiral blade is arranged on the rotating shaft. Several groups of heaters are arranged outside the extrusion barrel. One end of the extrusion barrel is provided with an extrusion motor, and at the lower part of the other end of the extrusion barrel, an extrusion head is provided. At the upper part of the bracket, a heat preservation cover is provided, and several maintenance windows are arranged on the heat preservation cover. The extrusion barrel is arranged inside the heat preservation cover. The water cooling tank is arranged below the extrusion head. At one end inside the water cooling tank, a reversing roller is provided, and several groups of conveying rollers are arranged on one side of the reversing roller. Guide rails are fixedly connected to the outer walls on both sides of the water cooling tank, and a lifting assembly is further arranged at the lower part of the water cooling tank. The granulation assembly includes a sliding seat, and sliders slidably connected to the guide rails are arranged on both sides of the sliding seat. At the upper part of the sliding seat, a support frame is provided. The front end of the support frame is hinged to the sliding seat, and a hydraulic cylinder is arranged at the rear end of the support frame. The cylinder seat of the hydraulic cylinder is hinged to the sliding seat, and the piston rod of the hydraulic cylinder is hinged to the support frame. Inside the support frame, a driving granulation roller and a driven granulation roller are provided, and several corresponding granulation knives are arranged on both the driving granulation roller and the driven granulation roller. A granulation motor is arranged on one side of the support frame and is connected to the driving granulation roller. At the other end of the driving granulation roller, a first driving belt pulley is provided. coaxially with the first driving belt pulley, a first driving gear is provided. One side of the first driving gear meshes with a first driven gear, and coaxially connected to the first driven gear is a first idler wheel. Below the first idler wheel, a second driven belt pulley is provided. The first idler wheel and the second driven belt pulley are connected by a belt, and the second driven belt pulley is connected to the driven granulation roller.

[0008] As a further preference of this technical solution, the lifting assembly includes a base. At both ends of the upper part of the base, a set of scissor lifting frames are respectively provided. The slidable sides of the scissor lifting frames are arranged oppositely. A sleeve is sleeved outside the connecting shaft at the upper part of the scissor lifting frame. On one side of the sleeve, two connecting rods are hinged. At the lower part of the water cooling tank, a double-headed screw rod is provided. Both ends of the double-headed screw rod are rotatably installed on the lower wall of the water cooling tank. The thread directions at both ends of the double-headed screw rod are opposite. A screw sleeve is threadedly connected to each end of the double-headed screw rod. The other end of the connecting rod is hinged to the screw sleeve. The connecting rods on both sides form a rhombus structure. One end of the double-headed screw rod is connected with a crank. By rotating the crank, the distance between the connecting shafts at the upper ends of the scissor lifting frames on both sides is adjusted, thereby realizing the synchronous lifting of the scissor lifting frames on both sides and ensuring the stability of the lifting of the water cooling tank.

[0009] As a further preference of this technical solution, the extrusion head includes a threaded end cover, which is threadedly connected to the end of the discharge port of the extrusion barrel. Below the threaded end cover, a first clamping groove is provided. The first clamping groove is detachably connected to an extrusion die, and extrusion holes are arranged on the extrusion die. The detachable extrusion die facilitates the replacement of the die.

[0010] As a further preference of this technical solution, several buckles are provided on the outer part of the threaded end cover, and an anti-detachment ring is provided at the lower part of the threaded end cover to prevent the extrusion die from falling off from the threaded end cover. A protrusion is provided on the anti-detachment ring, and the buckle is stuck under the protrusion, which facilitates the quick disassembly and assembly of the anti-detachment ring.

[0011] As a further preference of this technical solution, two sets of the first card slots are provided, and the diameters of the extrusion holes of the extrusion dies in the two sets of the first card slots are not equal, so as to facilitate the pelletizing production of plastic particles of the same material but different particle sizes at the same time. Two sets of the reversing rollers and the conveying rollers are provided to facilitate the simultaneous operation in cooperation with the two sets of extrusion dies; two sets of the active pelletizing drums and the driven pelletizing drums are provided, and the two sets of the active pelletizing drums and the driven pelletizing drums are symmetrically arranged. A second active belt pulley is provided on one side of the upper active pelletizing drum. The second active belt pulley is connected to the first active belt pulley through a belt. A second active gear is coaxially connected to one side of the second active belt pulley. A second driven gear is meshed with one side of the second active gear. A second idler wheel is coaxially connected to one side of the second driven gear. A second driven belt pulley is provided on one side of the second idler wheel; the second idler wheel is connected to the second driven belt pulley through a belt; through the above design, the present invention realizes the simultaneous production of plastic particles of the same material but different particle sizes.

[0012] As a further preference of this technical solution, the adjacent conveying rollers are arranged up and down staggeredly in the water cooling pool, and the drawbar bypasses the adjacent conveying rollers up and down staggeredly, which not only helps to extend the flow process of the drawbar underwater and enhance the water cooling effect of the drawbar, but also helps to ensure the tensioned state of the drawbar.

[0013] As a further preference of this technical solution, connecting plates are connected to both sides of the sliding seat. The connecting plates are in a T-shaped structure. A fastening knob is threadedly connected to the lower part of the connecting plate, and the end of the fastening knob abuts against the outer wall of the water cooling pool to prevent the pelletizing assembly from sliding during pelletizing.

[0014] As a further preference of this technical solution, several second card slots are provided on the outer walls of the active pelletizing drum and the driven pelletizing drum, and the pelletizing knives are detachably installed in the second card slots, which not only facilitates the maintenance and replacement of the pelletizing knives, but also facilitates the adjustment of the installation quantity of the pelletizing knives, so as to control the length of the plastic particles; retaining rings are threadedly connected to both ends of the active pelletizing drum and the driven pelletizing drum to prevent the pelletizing knives from falling off from the second card slots.

[0015] As a further preference of the present technical solution, two sets of feeding components are provided on one side of the support frame. The feeding components include support arms connected to both sides of the support frame. A lower roller is rotatably connected to the lower part of the support arm. One end of the lower roller is provided with a conveyor belt wheel. The lower conveyor belt wheel is connected to the first driven pulley by a belt, and the upper conveyor belt wheel is connected to the second driving pulley by a belt. An upper roller is provided above the lower roller. A chute is provided on the support arm, and both ends of the upper roller are slidably installed in the chute. Bearing seats are provided at both ends of the upper roller, and springs are provided above the bearing seats. The upper ends of the springs are fixedly connected to the support arm. The springs keep the upper roller and the lower roller clamping the strip, so as to enhance the conveying effect of the strip.

[0016] As a further preference of the present technical solution, a plurality of dehumidifying components are provided on both sides of the water cooling pool. The dehumidifying components include a fan frame installed on the side wall of the water cooling pool and a dehumidifying fan installed above the fan frame. The dehumidifying fan dries the surface of the strip coming out of the water, reducing the moisture content of the plastic particles.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1) The present invention uses a lifting component and a sliding granulation component to integrate extrusion granulation and hot cutting granulation into one machine, reducing the production cost of enterprises.

[0019] 2) At both ends of the upper part of the base of the lifting component, a set of scissor lifting frames are provided respectively. By rotating the crank, the distance between the connecting shafts at the upper ends of the two scissor lifting frames on both sides is adjusted, so as to realize the synchronous lifting of the two scissor lifting frames on both sides, ensuring the stability of the lifting of the water cooling pool.

[0020] 3) The extrusion head includes a threaded end cap, which is threadedly connected to the end of the discharge port of the extrusion barrel. A first card slot is provided below the threaded end cap, and the first card slot is detachably connected to an extrusion die. The extrusion die is provided with extrusion holes; the detachable extrusion die is convenient for replacing the die.

[0021] 4) A plurality of buckles are provided on the outside of the threaded end cap, and an anti-detachment ring is provided below the threaded end cap to prevent the extrusion die from falling off from the threaded end cap. Protrusions are provided on the anti-detachment ring, and the buckles are stuck below the protrusions, which is convenient for the quick disassembly and assembly of the anti-detachment ring.

[0022] 5) Two sets of first card slots are provided, and the diameters of the extrusion holes of the extrusion dies in the two sets of first card slots are not equal, so as to simultaneously cut and produce plastic particles of the same material but different particle sizes. Two sets of reversing rollers and conveying rollers are provided, so as to cooperate with the two sets of extrusion dies to work simultaneously; two sets of active cutting drums and driven cutting drums are provided, and the two sets of active cutting drums and driven cutting drums are symmetrically arranged. Through the above design, the present invention realizes the simultaneous production of plastic particles of the same material but different particle sizes.

[0023] 6) The adjacent conveying rollers are arranged vertically staggered in the water cooling tank, and the draw bar bypasses vertically staggered on the adjacent conveying rollers. This not only helps to extend the flow path of the draw bar underwater and enhance the water cooling effect of the draw bar, but also helps to ensure the tensioned state of the draw bar.

[0024] 7) T-shaped connecting plates are connected to both sides of the sliding seat. The lower part of the connecting plate is threadedly connected with a fastening knob, and the end of the fastening knob abuts against the outer wall of the water cooling tank to prevent the pelletizing assembly from sliding during pelletizing.

[0025] 8) A number of second card slots are provided on the outer walls of the active pelletizing drum and the driven pelletizing drum. The pelletizing knives are detachably installed in the second card slots, which not only facilitates the maintenance and replacement of the pelletizing knives, but also facilitates the adjustment of the installation quantity of the pelletizing knives, thereby controlling the length of the plastic pellets; retaining rings are threadedly connected to both ends of the active pelletizing drum and the driven pelletizing drum to prevent the pelletizing knives from falling out of the second card slots.

[0026] 9) Two sets of feeding assemblies are provided on one side of the support frame. The feeding assembly includes support arms connected to both sides of the support frame. A lower roller is rotatably connected to the lower part of the support arm. One end of the lower roller is provided with a conveyor belt wheel. The lower conveyor belt wheel is connected to the first driven pulley by a belt, and the upper conveyor belt wheel is connected to the second driving pulley by a belt. An upper roller is provided above the lower roller. A chute is provided on the support arm. Both ends of the upper roller are slidably installed in the chute. Bearing seats are provided at both ends of the upper roller. Springs are provided above the bearing seats. The upper ends of the springs are fixedly connected to the support arms. The springs enable the upper roller and the lower roller to clamp the draw bar to enhance the conveying effect of the draw bar.

[0027] 10) A number of dehumidification assemblies are provided on both sides of the water cooling tank. The dehumidification assembly includes a fan bracket installed on the side wall of the water cooling tank and a dehumidification fan installed above the fan bracket. The dehumidification fan dries the surface of the draw bar out of the water, reducing the moisture content of the plastic pellets. Description of the Drawings

[0028] Fig. Figure 1 is a schematic structural diagram of a pelletizing machine according to the present invention.

[0029] Fig. Figure 2 is a schematic internal structure diagram of an extrusion device in a pelletizing machine according to the present invention.

[0030] Fig. Figure 3 is a schematic internal structure diagram of an extrusion barrel in a pelletizing machine according to the present invention.

[0031] Fig. Figure 4 is an exploded view of an extrusion head in a pelletizing machine according to the present invention.

[0032] Fig. Figure 5 is a schematic structural diagram of a water cooling tank in a pelletizing machine according to the present invention.

[0033] Fig. Figure 6 is a cross-sectional view of a water cooling tank in a pelletizing machine according to the present invention.

[0034] Attached Figure 7 is a schematic structural diagram of one side of the granulation assembly in a granulator of the present invention.

[0035] Attached Figure 8 is a schematic structural diagram of the other side of the granulation assembly in a granulator of the present invention.

[0036] Attached Figure 9 is a schematic structural diagram of the active granulation drum in a granulator of the present invention.

[0037] Attached Figure 10 is a schematic structural diagram of the lifting assembly in a granulator of the present invention.

[0038] In the figure: 1. Extrusion device; 101. Bracket; 102. Extrusion motor; 103. Feed bin; 104. Extrusion barrel; 105. Rotating shaft; 106. Screw blade; 107. Heater; 108. Extrusion head; 1081. Threaded end cap; 1082. First clamping groove; 1083. Extrusion die; 1084. Anti - detachment ring; 1085. Protrusion; 1086. Buckle; 109. Thermal insulation cover; 110. Maintenance window; 2. Water - cooling pool; 201. Reversing roller; 202. Conveyor roller; 203. Guide rail; 3. Granulation assembly; 301. Slide seat; 302. Slide block; 303. Connecting plate; 304. Tightening knob; 305. Support frame; 306. Granulation motor; 307. Active granulation drum; 308. Driven granulation drum; 309. Second clamping groove; 310. Granulation knife; 311. Retaining ring; 312. First driving pulley; 313. First driving gear; 314. First driven gear; 315. First idler wheel; 316. First driven pulley; 317. Conveyor belt pulley; 318. Second driving pulley; 319. Second driving gear; 320. Second driven gear; 321. Second idler wheel; 322. Second driven pulley; 323. Hydraulic cylinder; 4. Feeding assembly; 401. Support arm; 402. Lower roller; 403. Upper roller; 404. Chute; 405. Bearing seat; 406. Spring; 5. Dehumidification assembly; 501. Fan frame; 502. Dehumidification fan; 6. Lifting assembly; 601. Base; 602. Scissor - type lifting frame; 603. Connecting shaft; 604. Sleeve; 605. Double - headed screw; 606. Connecting rod; 607. Nut sleeve; 608. Crank. Detailed implementation manners

[0039] Next, in combination with the attached Figures 1-10 , the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, specific orientation structure and operation. Therefore, it should not be construed as a limitation to the present invention.

[0041] As Figures 1-3 , Figure 5 , Figure 7 As shown, a pelletizer includes an extrusion device 1, a water cooling tank 2 and a pelletizing assembly 3. The extrusion device 1 includes a bracket 101. An extrusion barrel 104 is provided on the bracket 101. A feed bin 103 is provided at the upper part of the extrusion barrel 104. A rotating shaft 105 is provided inside the extrusion barrel 104. A spiral blade 106 is provided on the rotating shaft 105. A number of groups of heaters 107 are provided outside the extrusion barrel 104. An extrusion motor 102 is provided at one end of the extrusion barrel 104. An extrusion head 108 is provided at the lower part of the other end of the extrusion barrel 104. A heat preservation cover 109 is provided at the upper part of the bracket 101. A number of inspection windows 110 are provided on the heat preservation cover 109. The extrusion barrel 104 is arranged inside the heat preservation cover 109. The water cooling tank 2 is arranged at the lower part of the extrusion head 108. A reversing roller 201 is provided at one end inside the water cooling tank 2. A number of groups of conveying rollers 202 are provided on one side of the reversing roller 201. Guide rails 203 are fixedly connected to the outer walls on both sides of the water cooling tank 2. A lifting assembly 6 is further provided at the lower part of the water cooling tank 2. The pelletizing assembly 3 includes a sliding seat 301. Sliders 302 slidably connected to the guide rails 203 are provided on both sides of the sliding seat 301. A support frame 305 is provided at the upper part of the sliding seat 301. The front end of the support frame 305 is hinged to the sliding seat 301. A hydraulic cylinder 323 is provided at the rear end of the support frame 305. The cylinder block of the hydraulic cylinder 323 is hinged to the sliding seat 301. The piston rod of the hydraulic cylinder 323 is hinged to the support frame 305. An active pelletizing roller 307 and a driven pelletizing roller 308 are provided inside the support frame 305. A number of corresponding pelletizing knives 310 are provided on both the active pelletizing roller 307 and the driven pelletizing roller 308. A pelletizing motor 306 is provided on one side of the support frame 305. The pelletizing motor 306 is connected to the active pelletizing roller 307. A first active belt pulley 312 is provided at the other end of the active pelletizing roller 307. A first active gear 313 is coaxially provided with the first active belt pulley 312. A first driven gear 314 is meshed with one side of the first active gear 313. A first intermediate wheel 315 is coaxially connected to the first driven gear 314. A second driven belt pulley 322 is provided at the lower part of the first intermediate wheel 315. The first intermediate wheel 315 is connected to a first driven belt pulley 316 through a belt. The second driven belt pulley 322 is connected to the driven pelletizing roller 308.

[0042] As Figure 10As shown, in this embodiment, the lifting assembly 6 includes a base 601. At both ends of the upper part of the base 601, a set of scissor lifting frames 602 are provided. The slidable sides of the scissor lifting frames 602 are arranged facing each other. A sleeve 604 is sleeved outside the connecting shaft 603 at the upper part of the scissor lifting frame 602. Two connecting rods 606 are hinged on one side of the sleeve 604. A double-headed screw 605 is provided at the lower part of the water-cooling pool 2. The two ends of the double-headed screw 605 are rotatably installed on the lower wall of the water-cooling pool 2. The thread directions at both ends of the double-headed screw 605 are opposite. A nut 607 is threadedly connected to each end of the double-headed screw 605. The other end of the connecting rod 606 is hinged to the nut 607. The connecting rods 606 on both sides form a rhombus structure. One end of the double-headed screw 605 is connected with a crank 608; by rotating the crank 608, the distance between the connecting shafts 603 at the upper ends of the scissor lifting frames 602 on both sides is adjusted, so as to realize the synchronous lifting of the scissor lifting frames 602 on both sides and ensure the stability of the lifting of the water-cooling pool 2.

[0043] As Figure 4 shown, in this embodiment, the extrusion head 108 includes a threaded end cap 1081. The threaded end cap 1081 is threadedly connected to the end of the discharge port of the extrusion barrel 104. A first slot 1082 is provided at the lower part of the threaded end cap 1081. The first slot 1082 is detachably connected with an extrusion die 1083. Extrusion holes are provided on the extrusion die 1083; the detachable extrusion die 1083 facilitates the replacement of the die.

[0044] As Figure 4 shown, in this embodiment, a plurality of buckles 1086 are provided outside the threaded end cap 1081. An anti-detachment ring 1084 is provided at the lower part of the threaded end cap 1081 to prevent the extrusion die 1083 from falling off from the threaded end cap 1081. A protrusion 1085 is provided on the anti-detachment ring 1084. The buckles 1086 are stuck under the protrusion 1085, which facilitates the quick disassembly and assembly of the anti-detachment ring 1084.

[0045] As Figure 4 、 Figures 7-8As shown, in this embodiment, there are two sets of the first card slots 1082, and the diameters of the extrusion holes of the extrusion dies 1083 in the two sets of the first card slots 1082 are not equal, so as to facilitate the simultaneous pelletizing production of plastic particles of the same material but different particle sizes. There are two sets of the reversing rollers 201 and the conveying rollers 202, so as to facilitate the simultaneous operation in cooperation with the two sets of extrusion dies 1083. There are two sets of the driving pelletizing drums 307 and the driven pelletizing drums 308, and the two sets of the driving pelletizing drums 307 and the driven pelletizing drums 308 are symmetrically arranged. On one side of the upper driving pelletizing drum 307, there is a second driving pulley 318. The second driving pulley 318 is connected to the first driving pulley 312 through a belt. On one side of the second driving pulley 318, there is a second driving gear 319 coaxially connected. On one side of the second driving gear 319, there is a second driven gear 320 engaged. On one side of the second driven gear 320, there is a second idler wheel 321 coaxially connected. On one side of the second idler wheel 321, there is a second driven pulley 322. The second idler wheel 321 is connected to the second driven pulley 322 through a belt. Through the above design, the present invention realizes the simultaneous production of plastic particles of the same material but different particle sizes.

[0046] As Figure 6 shown, in this embodiment, the adjacent conveying rollers 202 are arranged up and down staggeredly in the water cooling pool 2, and the strip is wound around the adjacent conveying rollers 202 up and down staggeredly, which not only helps to extend the flow path of the strip underwater and enhance the water cooling effect of the strip, but also helps to ensure the tensioned state of the strip.

[0047] As Figures 7-8 shown, in this embodiment, both sides of the sliding seat 301 are connected with connecting plates 303. The connecting plates 303 are of T-shaped structure. The lower part of the connecting plates 303 is threadedly connected with fastening knobs 304. The ends of the fastening knobs 304 abut against the outer wall of the water cooling pool 2 to prevent the pelletizing assembly 3 from sliding during pelletizing.

[0048] As Figure 9 shown, in this embodiment, a number of second card slots 309 are provided on the outer walls of the driving pelletizing drum 307 and the driven pelletizing drum 308. The pelletizing knives 310 are detachably installed in the second card slots 309, which not only facilitates the maintenance and replacement of the pelletizing knives 310, but also facilitates the adjustment of the installation quantity of the pelletizing knives 310, so as to control the length of the plastic particles. The two ends of the driving pelletizing drum 307 and the driven pelletizing drum 308 are threadedly connected with retaining rings 311 to prevent the pelletizing knives 310 from falling off from the second card slots 309.

[0049] As Figures 7-8As shown in the figure, in this embodiment, two sets of feeding components 4 are provided on one side of the support frame 305. The feeding component 4 includes support arms 401 connected to both sides of the support frame 305. A lower roller 402 is rotatably connected to the lower part of the support arm 401. One end of the lower roller 402 is provided with a conveyor belt wheel 317. The lower conveyor belt wheel 317 is connected to the first driven belt wheel 316 by a belt, and the upper conveyor belt wheel 317 is connected to the second driving belt wheel 318 by a belt. An upper roller 403 is provided above the lower roller 402. A chute 404 is provided on the support arm 401. Both ends of the upper roller 403 are slidably installed in the chute 404. Bearing seats 405 are provided at both ends of the upper roller 403. Springs 406 are provided above the bearing seats 405. The upper ends of the springs 406 are fixedly connected to the support arm 401. The springs 406 keep the upper roller 403 and the lower roller 402 clamping the draw bar, so as to enhance the conveying effect of the draw bar.

[0050] As Figure 5 As shown in the figure, in this embodiment, several dehumidifying components 5 are provided on both sides of the water cooling pool 2. The dehumidifying component 5 includes a fan frame 501 installed on the side wall of the water cooling pool 2 and a dehumidifying fan 502 installed above the fan frame 501. The dehumidifying fan 502 dries the surface of the draw bar out of the water, reducing the moisture content of the plastic particles.

[0051] When extruding and pelletizing, the pelletizing component 3 is moved to the end of the water cooling pool 2, and the hydraulic cylinder 323 is contracted to keep the pelletizing component 3 in a vertical state. After the plastic is melted in the extrusion device 1, it is extruded in the form of a draw bar from the extrusion head 108. The end of the draw bar bypasses the reversing roller 201 and then bypasses each conveying roller 202 in turn, and then enters between the upper roller 403 and the lower roller 402 and enters the active pelletizing drum 307 and the driven pelletizing drum 308 of the pelletizing component 3 for pelletizing operation.

[0052] During hot cutting, first remove the upper roller 403 and the lower roller 402 of the feeding component 4, then control the piston rod of the hydraulic cylinder 323 to extend, so that the support frame 305 is turned to a horizontal state around the front hinge point, then loosen the fastening knob 304, slide the pelletizing component 3 to the lower part of the extrusion head 108 and lock it again, and then turn the crank 608 to control the lifting component 6 to raise the water cooling pool 2 to reduce the distance between the draw bar and the pelletizing component 3. After the plastic is melted and pelletized by the pelletizing component 3, it falls into the water cooling pool 2, realizing an integrated machine for extrusion granulation and hot cutting granulation, and reducing the production cost of the enterprise.

[0053] The above content is only an example and explanation of the structure of the present invention. Those skilled in the art of this technology make various modifications or supplements or use similar methods to replace the specific embodiments described, as long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should all belong to the protection scope of the present invention.

Claims

1. A pelletizer, comprising an extrusion device, a water cooling tank and a pelletizing assembly. The extrusion device includes a bracket, on which an extrusion barrel is provided. A feed bin is arranged at the upper part of the extrusion barrel. A rotating shaft is arranged inside the extrusion barrel, and a spiral blade is provided on the rotating shaft. A number of groups of heaters are arranged outside the extrusion barrel. An extrusion motor is provided at one end of the extrusion barrel, and an extrusion head is arranged at the lower part of the other end of the extrusion barrel. A heat preservation cover is arranged at the upper part of the bracket, and a number of inspection windows are provided on the heat preservation cover. The extrusion barrel is arranged inside the heat preservation cover; the water cooling tank is arranged at the lower part of the extrusion head. A reversing roller is arranged at one end inside the water cooling tank, and a number of groups of conveying rollers are arranged on one side of the reversing roller. It is characterized in that, Guide rails are fixedly connected to the outer walls on both sides of the water-cooled pool, and a lifting assembly is also provided at the lower part of the water-cooled pool; the granulation assembly includes a sliding seat, sliders slidingly connected to the guide rails are provided on both sides of the sliding seat, a support frame is provided on the upper part of the sliding seat, the front end of the support frame is hinged to the sliding seat, a hydraulic cylinder is provided at the rear end of the support frame, the cylinder block of the hydraulic cylinder is hinged to the sliding seat, and the piston rod of the hydraulic cylinder is hinged to the support frame; a driving granulation roller and a driven granulation roller are provided in the support frame, and a number of corresponding granulation knives are provided on both the driving granulation roller and the driven granulation roller; a granulation motor is provided on one side of the support frame, the granulation motor is connected to the driving granulation roller, a first driving pulley is provided at the other end of the driving granulation roller, a first driving gear is coaxially provided on the first driving pulley, a first driven gear is meshed on one side of the first driving gear, a first intermediate pulley is coaxially connected to the first driven gear, a second driven pulley is provided below the first intermediate pulley, the first intermediate pulley is connected to the second driven pulley by a belt, and the second driven pulley is connected to the driven granulation roller; connecting plates are connected to both sides of the sliding seat, the connecting plates are in a T-shaped structure, fastening knobs are threadedly connected to the lower parts of the connecting plates, and the ends of the fastening knobs abut against the outer wall of the water-cooled pool; when extruding and granulating, move the granulation assembly to the end of the water-cooled pool, and contract the hydraulic cylinder to keep the granulation assembly in a vertical state; when hot granulating, control the piston rod of the hydraulic cylinder to extend, so that the support frame rotates around the front hinge point to a horizontal state, then loosen the fastening knob, slide the granulation assembly to the lower part of the extrusion head and lock it again.

2. The pelletizer according to claim 1, wherein, The lifting assembly includes a base, a set of scissor lifting frames are provided at both ends of the upper part of the base, the slidable sides of the scissor lifting frames are arranged oppositely, sleeves are sleeved outside the connecting shafts of the upper parts of the scissor lifting frames, two connecting rods are hinged to one side of the sleeves, a double-headed screw rod is provided at the lower part of the water-cooled pool, both ends of the double-headed screw rod are rotatably installed on the lower wall of the water-cooled pool, the thread directions at both ends of the double-headed screw rod are opposite, a nut sleeve is threadedly connected to each end of the double-headed screw rod, the other ends of the connecting rods are hinged to the nut sleeves, the connecting rods on both sides form a rhombus structure, and a crank is connected to one end of the double-headed screw rod.

3. The pelletizer according to claim 1, characterized in that, The extrusion head includes a threaded end cap, the threaded end cap is threadedly connected to the end of the discharge port of the extrusion barrel, a first card slot is provided below the threaded end cap, and an extrusion die is detachably connected to the first card slot, and extrusion holes are provided on the extrusion die.

4. The pelletizer according to claim 3, characterized in that, A number of buckles are provided outside the threaded end cap, an anti-detachment ring is provided below the threaded end cap, protrusions are provided on the anti-detachment ring, and the buckles are stuck below the protrusions.

5. A pelletizer according to claim 3, characterized in that, There are two sets of the first card slots, and the diameters of the extrusion holes of the extrusion dies in the two sets of first card slots are not equal, and there are two sets of the reversing rollers and the conveying rollers; there are two sets of the driving granulation roller and the driven granulation roller, and the two sets of the driving granulation roller and the driven granulation roller are symmetrically arranged, a second driving pulley is provided on one side of the upper driving granulation roller, the second driving pulley is connected to the first driving pulley by a belt, a second driving gear is coaxially connected to one side of the second driving pulley, a second driven gear is meshed on one side of the second driving gear, a second intermediate pulley is coaxially connected to one side of the second driven gear, and a second driven pulley is provided on one side of the second intermediate pulley; the second intermediate pulley is connected to the second driven pulley by a belt.

6. A pelletizer according to claim 5, characterized in that, The adjacent conveying rollers are arranged vertically staggered in the water cooling pool, and the drawbars bypass the adjacent conveying rollers vertically staggered.

7. A pelletizer according to claim 1, characterized in that, A number of second clamping grooves are provided on the outer walls of the active pelletizing drum and the driven pelletizing drum, the pelletizing knives are detachably installed in the second clamping grooves, and retaining rings are threadedly connected to both ends of the active pelletizing drum and the driven pelletizing drum.

8. A pelletizer according to claim 5, characterized in that, Two sets of feeding components are provided on one side of the support frame. Each feeding component includes a support arm connected to both sides of the support frame. A lower roller is rotatably connected to the lower part of the support arm. A conveyor belt wheel is provided at one end of the lower roller. The lower conveyor belt wheel is connected to the first driven pulley by a belt, and the upper conveyor belt wheel is connected to the second driving pulley by a belt. An upper roller is provided above the lower roller. A sliding groove is provided on the support arm, and both ends of the upper roller are slidably installed in the sliding groove. Bearing seats are provided at both ends of the upper roller, and springs are provided above the bearing seats. The upper ends of the springs are fixedly connected to the support arm.

9. A pelletizer according to any one of claims 1-8, characterized in that, A number of dehumidification components are provided on both sides of the water cooling pool. Each dehumidification component includes a fan bracket installed on the side wall of the water cooling pool and a dehumidification fan installed above the fan bracket.

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