Three-screw extruder for master batch preparation

Abstract

The invention relates to a three-screw extruder for master batch preparation, and belongs to the technical field of screw extruders, the three-screw extruder comprises a machine barrel, three extrusion screws are rotatably arranged in the machine barrel, one end of the machine barrel is connected with a die head, the die head is connected with a cutter assembly, and the end, away from the die head, of the machine barrel is connected with a driving assembly used for controlling the three extrusion screws to rotate. A feeding hopper is installed on the machine barrel, a vortex tube is installed on the machine barrel, a conveying assembly is arranged on the machine barrel, the conveying assembly is used for collecting gas exhausted by an exhaust pipe of the machine barrel and conveying the gas to the vortex tube in a pressurized mode, hot gas is exhausted from one end of the vortex tube, and the feeding hopper is heated through the conveying assembly. Meanwhile, the heated hot air is mixed with air exhausted by an exhaust pipe of the machine barrel through the conveying assembly, and cold air is exhausted from the other end of the vortex tube and is used for carrying out auxiliary cooling on cooling water in the cutter assembly through the conveying assembly. The device has the effects of recovering and utilizing the gas in the exhaust pipe of the machine barrel and reducing the pollution to the factory environment.

Description

Technical Field

[0001] The present application relates to the technical field of screw extruders, and in particular to a three-screw extruder for preparing a masterbatch. Background Art

[0002] Three-screw extruders are usually used to process materials with high viscosity such as plastics, rubber, masterbatch, etc. Under high temperature, the material will undergo a certain degree of thermal decomposition or volatilization, releasing gas. Due to the high mixing and shearing effect of the three-screw extruder, the material may have a higher temperature in a local area, promoting the release of gas.

[0003] In addition, the high shear characteristics of the three-screw extruder will intensify the friction and local heating of the material, thereby accelerating the release of gas. During the intense mixing and extrusion of the material between the screws, more friction heat will be generated, further intensifying the decomposition of organic compounds.

[0004] At the same time, since the three-screw extruder has stronger mixing and extrusion capabilities, the processing volume may be larger than that of the traditional twin-screw or single-screw extruder, so the waste gas emissions per unit time may also be relatively large.

[0005] These gases are usually discharged directly from the exhaust pipe of the barrel. These gases often contain volatile organic compounds (VOCs), particulate matter and other harmful substances. Long-term emission will not only pollute the factory environment, but also have an adverse effect on the health of operators. Summary of the invention

[0006] In order to recycle and utilize the exhaust pipe gas of the barrel and reduce the pollution to the factory environment, the present application provides a three-screw extruder for masterbatch preparation.

[0007] The three-screw extruder for masterbatch preparation provided in this application adopts the following technical solution: A three-screw extruder for preparing a masterbatch comprises a barrel, wherein three extrusion screws are rotatably arranged in the barrel, one end of the barrel is connected to a die head, the die head is connected to a cutter assembly, the three extrusion screws are arranged in parallel, and two adjacent extrusion screws are meshed with each other, one end of the barrel away from the die head is connected to a drive assembly for controlling the rotation of the three extrusion screws, a feed hopper is installed on the barrel, a vortex tube is installed on the barrel, a transmission assembly is arranged on the barrel, the transmission assembly is used to collect gas discharged from an exhaust pipe of the barrel, the transmission assembly collects gas discharged from the exhaust pipe of the barrel, and pressurizes and conveys the gas to the vortex tube, one end of the vortex tube discharges hot gas and heats the feed hopper through the transmission assembly, and the heated hot gas is mixed with the gas discharged from the exhaust pipe of the barrel through the transmission assembly, and the other end of the vortex tube discharges cold air and auxiliary cooling of cooling water in the cutter assembly is performed through the transmission assembly.

[0008] By adopting the above technical solution, the material in the feed hopper falls into the barrel, and then the driving component drives the three extrusion screws to rotate to shear and convey the material, and the barrel is equipped with a heating module to heat and melt the material, the material is conveyed to the die head for extrusion, and then the cutter component cuts the material into pellets; The gas is discharged from the exhaust pipe to the transmission component for collection, and then the gas is pressurized and transported to the air inlet of the vortex tube through the transmission component. Then the end of the vortex tube that discharges the hot gas is transported to the feed hopper through the transmission component to heat the feed hopper, thereby preheating the material in the feed hopper. When the preheated material enters the extruder, its temperature has been increased, which reduces the heating time of the material in the barrel, thereby speeding up the overall processing speed of the extruder. Since the extruder no longer needs to spend a lot of energy and time to heat the material to the processing temperature, the production efficiency will be significantly improved. After passing through the feed hopper, the hot gas is re-pressurized through the transportation system and enters the air inlet of the vortex tube; One end of the vortex tube that discharges cold air passes through the cutter assembly to assist in cooling the water in the cutter assembly, reducing the amount of heat absorbed by the water during transportation from the water cooling system to the cutter assembly, which causes the water temperature to not meet the standard. The water in the cutter assembly is at a suitable temperature, which is conducive to better pelletizing. Finally, the cold air is discharged from the cutter assembly and treated by the exhaust gas treatment system before being discharged. Therefore, the gas discharged from the barrel is collected and utilized, which not only reduces the pollution to the factory environment, but also helps to improve the quality of the finished product and the production efficiency.

[0009] Optionally, the transmission component includes an air storage box, which is connected to the exhaust pipe of the barrel, an air pump is installed on the air storage box, and the air storage box is also connected to a pressure pump, the pressure pump is connected to a first exhaust pipe, the first exhaust pipe is connected to the air inlet end of the vortex tube, the end of the vortex tube that discharges hot air is connected to a preheating pipe, the preheating pipe is arranged on the feed hopper, the air outlet end of the preheating pipe is connected to the air storage box, the end of the vortex tube that discharges cold air is connected to a cooling pipe, the cooling pipe is arranged in the cutter assembly, and the end of the cooling pipe that discharges cold air extends out of the cutter assembly.

[0010] By adopting the above technical solution, after the gas discharged from the barrel enters the air storage box, the air pump can pump air into the air storage box to ensure that a constant air pressure is maintained in the air storage box, and then the pressure pump discharges the gas in the air storage box to the first exhaust pipe and then enters the vortex tube. The hot air in the vortex tube is discharged from the preheating pipe, and the preheating pipe heats the feed hopper, thereby realizing preheating of the material. After the hot air heats the feed hopper, it flows back to the air storage box for cyclic pressurization use; The cold air from the vortex tube is discharged into the cooling pipe, which assists in cooling the water in the cutter assembly and then discharges it from the cooling pipe to the exhaust gas treatment system for treatment.

[0011] Optionally, the preheating pipe is arranged circumferentially along the outer wall of the feed hopper, and the cooling pipe is arranged circumferentially along the outer wall of the cutter assembly.

[0012] By adopting the above technical solution, the surrounding arrangement of the preheating pipe is conducive to the feed hopper fully absorbing the heat of the hot air for heating, and the surrounding arrangement of the cooling pipe is conducive to fully absorbing the heat of the water for auxiliary cooling.

[0013] Optionally, there are two feed hoppers, and there are two vortex tubes, which correspond to the feed hoppers one by one. The air inlet ends of the two vortex tubes are commonly connected to a first diverter pipe, which is connected to the first exhaust pipe. The two preheating tubes are commonly connected to a second diverter pipe, which is connected to the air storage tank. The ends of the two vortex tubes that discharge cold air are commonly connected to a third diverter pipe, which is connected to the cooling pipe. The diverter pipe sections of the first diverter pipe, the second diverter pipe and the third diverter pipe are all equipped with solenoid valves.

[0014] By adopting the above technical solution, when two feed hoppers are supplying materials, all the solenoid valves can be opened at the same time, so that the two feed hoppers can be preheated at the same time. When only one feed hopper is supplying materials, the first diversion pipe, the second diversion pipe and the third diversion pipe only open the corresponding solenoid valves, thereby realizing preheating of a single feed hopper.

[0015] Optionally, the drive assembly includes a motor, the motor is connected to a reducer, the reducer is connected to a drive shaft, a first gear is coaxially connected to the drive shaft, two second gears are rotatably connected to the barrel, both of the second gears are meshed with the first gear, the first gear is coaxially connected to the extrusion screw located in the middle, and the two second gears are coaxially connected to the extrusion screws located on both sides.

[0016] By adopting the above technical solution, the motor is started to rotate the drive shaft, the drive shaft drives the first gear to rotate, the first gear drives the two second gears to rotate, so that the three extrusion screws rotate at the same time, and the adjacent extrusion screws rotate in opposite directions to achieve shearing of the material.

[0017] Optionally, a stirring screw is rotatably connected in the feed hopper, and the stirring screw is connected to a control component. The control component is used to drive the stirring screw to rotate. The control component is connected to the drive shaft, and the drive shaft drives the control component to start.

[0018] By adopting the above technical solution, when the driving shaft drives the extrusion screw to rotate, the driving shaft also drives the control component to drive, so that the control component drives the stirring screw to rotate at the same time, so that the various masterbatches in the feed hopper are mixed evenly in advance and then conveyed into the barrel.

[0019] Optionally, the control component includes a third gear, which is coaxially fixed on the drive shaft. A shell is installed on the barrel, a first rotating shaft is rotatably connected in the shell, a fourth gear is coaxially fixed to the first rotating shaft, the third gear is meshed with the fourth gear, the first rotating shaft extends into the feed hopper and is connected to a first bevel gear, a second bevel gear is coaxially connected to the stirring screw, and the first bevel gear is meshed with the second bevel gear.

[0020] By adopting the above technical solution, the driving shaft drives the third gear to rotate, the third gear drives the fourth gear to rotate, the fourth gear drives the first rotating shaft to rotate, the first rotating shaft drives the first bevel gear to rotate, and the first bevel gear drives the second bevel gear to rotate, so that the second bevel gear drives the stirring screw to rotate.

[0021] Optionally, the number of the feed hoppers is two, the two stirring screws are connected by a connecting piece, the control component drives one stirring screw to rotate, and the control component drives the connecting piece to control the rotation of the other stirring screw.

[0022] By adopting the above technical solution, under the action of the connecting piece, the control component can drive the two stirring screws to rotate at the same time.

[0023] Optionally, the connecting member includes a second rotating shaft, a fixed sleeve is provided in the feed hopper, the fixed sleeve is rotatably connected to the stirring screw, the first rotating shaft passes through the feed hopper and the fixed sleeve adjacent to it, the end of the first rotating shaft away from the second gear is connected to an electromagnetic clutch, the electromagnetic clutch is connected to the second rotating shaft, the second rotating shaft penetrates into the feed hopper away from the motor, and the first bevel gear is also coaxially connected to the second rotating shaft.

[0024] By adopting the above technical solution, when only one feed hopper is needed to feed materials, the electromagnetic clutch is not energized. At this time, the first rotating shaft only drives the stirring screw adjacent to the driving shaft to rotate. When the two feed hoppers are feeding materials at the same time, the electromagnetic clutch is energized. At this time, the first rotating shaft can also drive the second rotating shaft to rotate, thereby realizing that the two first bevel gears drive their respective second bevel gears to rotate, so that the two stirring screws can rotate at the same time.

[0025] Optionally, the cutter assembly includes a mounting shell, in which the cutter is rotatably connected, the cooling pipe extends into the mounting shell and is spirally arranged circumferentially along the outer wall of the mounting shell, and one end of the cooling pipe extends out of the mounting shell.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The gas is discharged from the exhaust pipe to the transmission component for collection, and then the gas is pressurized and transported to the air inlet end of the vortex tube through the transmission component. Then the end of the vortex tube that discharges the hot gas is transported to the feed hopper through the transmission component to heat the feed hopper, thereby preheating the material in the feed hopper. When the preheated material enters the extruder, its temperature has been increased, which reduces the heating time of the material in the barrel, thereby speeding up the overall processing speed of the extruder. Since the extruder no longer needs to spend a lot of energy and time to heat the material to the processing temperature, the production efficiency will be significantly improved. After passing through the feed hopper, the hot gas is re-pressurized through the transportation system and enters the air inlet end of the vortex tube; 2. One end of the vortex tube that discharges cold air passes through the cutter assembly to assist in cooling the water in the cutter assembly, reducing the amount of heat absorbed by the water during transportation from the water cooling system to the cutter assembly, which causes the water temperature to not meet the standard. The water in the cutter assembly is at a suitable temperature, which is conducive to better pelletizing. Finally, the cold air is discharged from the cutter assembly and treated by the exhaust gas treatment system before being discharged; Therefore, the gas discharged from the barrel is collected and utilized, which not only reduces the pollution to the factory environment, but also helps to improve the quality of the finished product and the production efficiency; 3. When the drive shaft drives the extrusion screw to rotate, the drive shaft also drives the control component to drive, so that the control component drives the stirring screw to rotate at the same time, so that the various masterbatches in the feed hopper are mixed evenly in advance and then conveyed into the barrel. No additional drive parts are required for driving, and the extrusion screw and the stirring screw can be driven synchronously to ensure the normal supply of materials, while reducing failure points and maintenance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the structure of the embodiment of the present application for reflecting the driving component, the control component and the linkage.

[0029] Figure 3 It is a schematic diagram of the structure of the cutter assembly used to illustrate the embodiment of the present application.

[0030] Description of reference numerals: 1, barrel; 11, extrusion screw; 12, die head; 2, cutter assembly; 21, mounting shell; 22, cutter; 3, drive assembly; 31, motor; 32, reducer; 33, drive shaft; 34, first gear; 35, second gear; 4, feed hopper; 41, stirring screw; 5, vortex tube; 6, transmission assembly; 61, air storage box; 62, air pump; 63, air pressure detection meter; 64, pressure pump; 65. First exhaust pipe; 66. First shunt pipe; 67. Preheating pipe; 68. Second shunt pipe; 69. Third shunt pipe; 610. Cooling pipe; 611. Solenoid valve; 7. Control assembly; 71. Third gear; 72. Housing; 73. First rotating shaft; 74. Fourth gear; 75. First bevel gear; 76. Second bevel gear; 8. Linking member; 81. Second rotating shaft; 82. Fixed sleeve; 83. Electromagnetic clutch. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] The embodiment of the present application discloses a three-screw extruder for preparing a masterbatch.

[0033] like Figure 1The three-screw extruder for preparing a masterbatch comprises a barrel 1, three extrusion screws 11 are rotatably arranged in the barrel 1, one end of the barrel 1 is connected to a die head 12, the die head 12 is connected to a cutter assembly 2, the three extrusion screws 11 are arranged in parallel, and two adjacent extrusion screws 11 are meshed with each other, one end of the barrel 1 away from the die head 12 is connected to a drive assembly 3 for controlling the rotation of the three extrusion screws 11, two feed hoppers 4 are installed on the barrel 1, two vortex tubes 5 are installed on the barrel 1, and the vortex tubes 5 are connected to the feed hoppers 4 and the feed hoppers 4. The hoppers 4 correspond one to one, and a transmission component 6 is provided on the barrel 1. The transmission component 6 is used to collect the gas discharged from the exhaust pipe of the barrel 1. The transmission component 6 pressurizes the gas and transports it to the vortex tube 5. One end of the vortex tube 5 discharges hot gas and heats the corresponding feed hopper 4 through the transmission component 6. At the same time, the heated hot gas is also mixed with the gas discharged from the exhaust pipe of the barrel 1 through the transmission component 6, and the other end of the vortex tube 5 discharges cold air and assists in cooling the cooling water in the cutter assembly 2 through the transmission component 6.

[0034] There are stirring screws 41 rotatably connected in the two feed hoppers 4, and the feed hopper 4 adjacent to the drive assembly 3 is connected to the control assembly 7. The two stirring screws 41 are connected by a connecting piece 8. The control assembly 7 drives one stirring screw 41 to rotate, and the control assembly 7 drives the connecting piece 8 to control the rotation of the other stirring screw 41. The control assembly 7 is connected to the drive assembly 3, and the drive assembly 3 drives the control assembly 7 to start.

[0035] The material from the feed hopper 4 falls into the barrel 1, and then the driving assembly 3 drives the three extrusion screws 11 to rotate to shear and convey the material. The barrel 1 has a heating module to heat and melt the material, and the material is conveyed to the die head 12 for extrusion, and then the cutter assembly 2 pelletizes the material. The driving component 3 also drives the control component 7 to drive, so that the control component 7 drives the stirring screw 41 to rotate at the same time, so that the various masterbatches in the feed hopper 4 are mixed in advance and evenly transported into the barrel 1; Furthermore, under the action of the linkage 8, the control assembly 7 can also simultaneously drive the two stirring screws 41 to rotate, so that the two feed hoppers 4 can synchronously feed materials, and the three extrusion screws 11 can synchronously shear and transport materials.

[0036] The gas is discharged from the exhaust pipe to the transmission component 6 for collection, and then the gas is pressurized and transported to the air inlet end of the vortex tube 5 through the transmission component 6. Then, one end of the vortex tube 5 that discharges the hot gas is transported to the feed hopper 4 through the transmission component 6 to heat the feed hopper 4, thereby preheating the material in the feed hopper 4. When the preheated material enters the extruder, its temperature has been increased, which reduces the heating time of the material in the barrel 1, thereby speeding up the overall processing speed of the extruder. Since the extruder no longer needs to spend a lot of energy and time to heat the material to the processing temperature, the production efficiency will be significantly improved. After passing through the feed hopper 4, the hot gas is re-pressurized through the transportation system and enters the air inlet end of the vortex tube 5; One end of the vortex tube 5 that discharges cold air passes through the cutter assembly 2 to assist in cooling the water in the cutter assembly 2, thereby reducing the amount of heat absorbed by the water during transportation from the water cooling system to the cutter assembly 2, which causes the water temperature to not meet the standard. The water in the cutter assembly 2 is at a suitable temperature, which is conducive to better pelletizing. Finally, the cold air is discharged from the cutter assembly 2 and treated by the exhaust gas treatment system before being discharged. Therefore, the gas discharged from the barrel 1 is collected and utilized, which not only reduces the pollution to the factory environment, but also helps to improve the quality of the finished product and the production efficiency.

[0037] like Figure 1 The transmission component 6 includes an air storage box 61, which is connected to the exhaust pipe of the barrel 1. An air pump 62 is installed on the air storage box 61. An air pressure detection gauge 63 is also installed on the air storage box 61. The air storage box 61 is also connected to a pressure pump 64, and the pressure pump 64 is connected to a first exhaust pipe 65. The first exhaust pipe 65 is connected to a first shunt pipe 66. The two exhaust ends of the first shunt pipe 66 are respectively connected to the intake ends of the two vortex tubes 5. One end of the vortex tube 5 that discharges hot air is connected to a preheating pipe 67. The preheating pipe 67 is circumferentially arranged along the outer wall of the corresponding feed hopper 4. The exhaust ends of the two preheating pipes 67 are commonly connected to a second shunt pipe 68. The converging gas outlet end of the second shunt pipe 68 is connected to the air storage box 61. One end of the two vortex tubes 5 discharging cold air is commonly connected to the third shunt pipe 69, and the converging gas outlet end of the third shunt pipe 69 is connected to the cooling pipe 610, which is arranged around the outer wall of the cutter assembly 2, and one end of the cooling pipe 610 discharging cold air extends out of the cutter assembly 2 and is connected to the exhaust gas treatment system. The shunt pipe sections of the first shunt pipe 66, the second shunt pipe 68 and the third shunt pipe 69 are all installed with solenoid valves 611.

[0038] When two feed hoppers 4 are supplying materials, all the solenoid valves 611 can be opened at the same time so that the two feed hoppers 4 can be preheated at the same time. When only one feed hopper 4 is supplying materials, the first diversion pipe 66, the second diversion pipe 68 and the third diversion pipe 69 only open the corresponding solenoid valves 611, thereby preheating a single feed hopper 4.

[0039] After the gas discharged from the barrel 1 enters the air storage box 61, the air pump 62 can pump air into the air storage box 61 to ensure that a constant air pressure is maintained, and then the pressure pump 64 discharges the gas in the air storage box 61 to the first exhaust pipe 65 and then enters the vortex tube 5 through the first shunt pipe 66. The hot air in the vortex tube 5 is discharged from the preheating pipe 67, and the preheating pipe 67 heats the feed hopper 4, thereby preheating the material. After the hot air heats the feed hopper 4, it converges through the second shunt pipe 68 and is then discharged back to the air storage box 61 for cyclic pressurization use; The cold air of the vortex tube 5 is discharged to the third shunt pipe 69, and the third shunt pipe 69 collects the cold air of the two vortex tubes 5 and discharges it centrally into the cooling pipe 610. The cooling pipe 610 assists in cooling the water in the cutter assembly 2 and then discharges it to the exhaust gas treatment system for treatment.

[0040] like Figure 2 The driving assembly 3 includes a motor 31, the motor 31 is connected to a reducer 32, the reducer 32 is connected to a driving shaft 33, the driving shaft 33 is coaxially connected to a first gear 34, the barrel 1 is rotatably connected to two second gears 35, the two second gears 35 are both meshed with the first gear 34, the first gear 34 is coaxially connected to the extrusion screw 11 located in the middle, and the two second gears 35 are coaxially connected to the extrusion screws 11 located on both sides respectively; The control assembly 7 includes a third gear 71, which is coaxially fixed on the drive shaft 33. A housing 72 is installed on the barrel 1. A first rotating shaft 73 is rotatably connected in the housing 72. A fourth gear 74 is coaxially fixed to the first rotating shaft 73. The third gear 71 meshes with the fourth gear 74. The first rotating shaft 73 extends into the feed hopper 4 adjacent thereto and is connected with a first bevel gear 75. A second bevel gear 76 is coaxially connected to the stirring screw 41. The first bevel gear 75 meshes with the second bevel gear 76. The connecting member 8 includes a second rotating shaft 81, and a fixed sleeve 82 is fixed in each of the two feed hoppers 4. The fixed sleeve 82 is rotatably connected to the stirring screw 41. The first rotating shaft 73 passes through the feed hopper 4 and the fixed sleeve 82 adjacent to it. The end of the first rotating shaft 73 away from the third gear 71 is connected to an electromagnetic clutch 83, and the electromagnetic clutch 83 is connected to the second rotating shaft 81. The second rotating shaft 81 penetrates into the feed hopper 4 away from the motor 31, and the second rotating shaft 81 is rotatably connected to the fixed sleeve 82 of the feed hopper 4. At the same time, the second rotating shaft 81 is also coaxially connected to the first bevel gear 75, and the stirring screw 41 in the feed hopper 4 away from the motor 31 is also coaxially fixed with a second bevel gear 76.

[0041] The motor 31 is started to rotate the driving shaft 33, which drives the first gear 34 to rotate, and the first gear 34 drives the two second gears 35 to rotate, so that the three extrusion screws 11 rotate at the same time, and the adjacent extrusion screws 11 rotate in opposite directions, so as to achieve shearing of the material; At the same time, the driving shaft 33 drives the third gear 71 to rotate, the third gear 71 drives the fourth gear 74 to rotate, the fourth gear 74 drives the first rotating shaft 73 to rotate, the first rotating shaft 73 drives the first bevel gear 75 to rotate, the first bevel gear 75 drives the second bevel gear 76 to rotate, so that the second bevel gear 76 drives the stirring screw 41 to rotate, and the feed hopper 4 near the motor 31 stirs and feeds; When only one feed hopper 4 is needed to feed materials, the electromagnetic clutch 83 is not energized. At this time, the first rotating shaft 73 only drives the stirring screw 41 adjacent to the driving shaft 33 to rotate. When the two feed hoppers 4 are feeding materials at the same time, the electromagnetic clutch 83 is energized. At this time, the first rotating shaft 73 can also drive the second rotating shaft 81 to rotate, thereby realizing that the two first bevel gears 75 drive their respective second bevel gears 76 to rotate, so that the two stirring screws 41 can rotate at the same time to stir and feed the materials.

[0042] like Figure 3 The cutter assembly 2 includes a mounting shell 21, in which a cutter 22 is rotatably connected. A cooling pipe 610 extends into the mounting shell 21 and is spirally arranged along the outer wall of the mounting shell 21. One end of the cooling pipe 610 extends out of the mounting shell 21.

[0043] The implementation principle of the embodiment of the present application is as follows: the material from the feed hopper 4 falls into the barrel 1, and then the driving assembly 3 drives the three extrusion screws 11 to rotate to shear and convey the material, and the barrel 1 has a heating module to heat and melt the material, and the material is conveyed to the die head 12 for extrusion, and then the cutter assembly 2 pelletizes the material; The gas is discharged from the exhaust pipe to the transmission component 6 for collection, and then the gas is pressurized and transported to the air inlet end of the vortex tube 5 through the transmission component 6. Then, one end of the vortex tube 5 that discharges the hot gas is transported to the feed hopper 4 through the transmission component 6 to heat the feed hopper 4, thereby preheating the material in the feed hopper 4. When the preheated material enters the extruder, its temperature has been increased, which reduces the heating time of the material in the barrel 1, thereby speeding up the overall processing speed of the extruder. Since the extruder no longer needs to spend a lot of energy and time to heat the material to the processing temperature, the production efficiency will be significantly improved. After passing through the feed hopper 4, the hot gas is re-pressurized through the transportation system and enters the air inlet end of the vortex tube 5; One end of the vortex tube 5 that discharges cold air passes through the cutter assembly 2 to assist in cooling the water in the cutter assembly 2, thereby reducing the amount of heat absorbed by the water during transportation from the water cooling system to the cutter assembly 2, which causes the water temperature to not meet the standard. The water in the cutter assembly 2 is at a suitable temperature, which is conducive to better pelletizing. Finally, the cold air is discharged from the cutter assembly 2 and treated by the exhaust gas treatment system before being discharged. Therefore, the gas discharged from the barrel 1 is collected and utilized, which not only reduces the pollution to the factory environment, but also helps to improve the quality of the finished product and the production efficiency.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A three-screw extruder for preparing a masterbatch, characterized in that: The invention comprises a barrel (1), wherein three extrusion screws (11) are rotatably arranged in the barrel (1), one end of the barrel (1) is connected to a die head (12), the die head (12) is connected to a cutter assembly (2), the three extrusion screws (11) are arranged in parallel, and two adjacent extrusion screws (11) are meshed with each other, one end of the barrel (1) away from the die head (12) is connected to a drive assembly (3) for controlling the rotation of the three extrusion screws (11), a feed hopper (4) is installed on the barrel (1), a vortex tube (5) is installed on the barrel (1), and a transmission assembly (6) is installed on the barrel (1). The transmission component (6) is used to collect the gas discharged from the exhaust pipe of the barrel (1). The transmission component (6) collects the gas discharged from the exhaust pipe of the barrel (1) and pressurizes the gas to be transported to the vortex tube (5). One end of the vortex tube (5) discharges hot gas and heats the feed hopper (4) through the transmission component (6). At the same time, the heated hot gas is mixed with the gas discharged from the exhaust pipe of the barrel (1) through the transmission component (6). The other end of the vortex tube (5) discharges cold air and assists in cooling the cooling water in the cutter component (2) through the transmission component (6).

2. The three-screw extruder for preparing a masterbatch according to claim 1, characterized in that: The transmission assembly (6) comprises an air storage box (61), the air storage box (61) is connected to the exhaust pipe of the barrel (1), an air pump (62) is installed on the air storage box (61), the air storage box (61) is also connected to a pressure pump (64), the pressure pump (64) is connected to a first exhaust pipe (65), the first exhaust pipe (65) is connected to the air inlet end of the vortex tube (5), one end of the vortex tube (5) for discharging hot air is connected to a preheating pipe (67), the preheating pipe (67) is arranged on the feed hopper (4), the air outlet end of the preheating pipe (67) is connected to the air storage box (61), one end of the vortex tube (5) for discharging cold air is connected to a cooling pipe (610), the cooling pipe (610) is arranged in the cutter assembly (2), and the end of the cooling pipe (610) for discharging cold air extends out of the cutter assembly (2).

3. The three-screw extruder for preparing a masterbatch according to claim 2, characterized in that: The preheating pipe (67) is arranged circumferentially along the outer wall of the feed hopper (4), and the cooling pipe (610) is arranged circumferentially along the outer wall of the cutter assembly (2).

4. The three-screw extruder for preparing a masterbatch according to claim 3, characterized in that: The number of the feed hopper (4) is two, the number of the vortex tubes (5) is two, the vortex tubes (5) correspond to the feed hopper (4) one by one, the air inlet ends of the two vortex tubes (5) are commonly connected to a first shunt tube (66), the first shunt tube (66) is connected to the first exhaust pipe (65), the two preheating tubes (67) are commonly connected to a second shunt tube (68), the second shunt tube (68) is connected to the air storage box (61), the ends of the two vortex tubes (5) for discharging cold air are commonly connected to a third shunt tube (69), the third shunt tube (69) is connected to the cooling pipe (610), and the shunt tube sections of the first shunt tube (66), the second shunt tube (68) and the third shunt tube (69) are all installed with solenoid valves (611).

5. The three-screw extruder for preparing a masterbatch according to claim 1, characterized in that: The driving assembly (3) comprises a motor (31), the motor (31) is connected to a reducer (32), the reducer (32) is connected to a driving shaft (33), a first gear (34) is coaxially connected to the driving shaft (33), two second gears (35) are rotatably connected to the barrel (1), the two second gears (35) are both meshed with the first gear (34), the first gear (34) is coaxially connected to the extrusion screw (11) located in the middle, and the two second gears (35) are coaxially connected to the extrusion screws (11) located on both sides.

6. The three-screw extruder for preparing a masterbatch according to claim 5, characterized in that: A stirring screw (41) is rotatably connected inside the feed hopper (4), and the stirring screw (41) is connected to a control component (7). The control component (7) is used to drive the stirring screw (41) to rotate. The control component (7) is connected to the drive shaft (33), and the drive shaft (33) drives the control component (7) to start.

7. The three-screw extruder for preparing a masterbatch according to claim 6, characterized in that: The control assembly (7) comprises a third gear (71), the third gear (71) is coaxially fixed on the driving shaft (33), a shell (72) is installed on the barrel (1), a first rotating shaft (73) is rotatably connected in the shell (72), a fourth gear (74) is coaxially fixed to the first rotating shaft (73), the third gear (71) is meshed with the fourth gear (74), the first rotating shaft (73) extends into the feed hopper (4) and is connected to a first bevel gear (75), a second bevel gear (76) is coaxially connected to the stirring screw (41), and the first bevel gear (75) is meshed with the second bevel gear (76).

8. The three-screw extruder for preparing a masterbatch according to claim 7, characterized in that: The number of the feed hoppers (4) is two, the two stirring screws (41) are connected via a linking piece (8), the control component (7) drives one stirring screw (41) to rotate, and the control component (7) drives the linking piece (8) to control the rotation of the other stirring screw (41).

9. The three-screw extruder for preparing a masterbatch according to claim 8, characterized in that: The linkage (8) comprises a second rotating shaft (81), a fixed sleeve (82) is arranged in the feed hopper (4), the fixed sleeve (82) is rotatably connected to the stirring screw (41), the first rotating shaft (73) passes through the feed hopper (4) and the fixed sleeve (82) adjacent thereto, an electromagnetic clutch (83) is connected to the end of the first rotating shaft (73) away from the second gear (35), the electromagnetic clutch (83) is connected to the second rotating shaft (81), the second rotating shaft (81) passes into the feed hopper (4) away from the motor (31), and the first bevel gear (75) is also coaxially connected to the second rotating shaft (81).

10. The three-screw extruder for preparing a masterbatch according to claim 3, characterized in that: The cutter assembly (2) comprises a mounting shell (21), a cutter (22) being rotatably connected inside the mounting shell (21), the cooling pipe (610) extending into the mounting shell (21) and being spirally arranged along the circumferential direction of the outer wall of the mounting shell (21), and one end of the cooling pipe (610) extending out of the mounting shell (21).

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