Plastic extrusion granulation equipment

Abstract

The utility model relates to the technical field of pelletizers, in particular to plastic extrusion pelletizing equipment which comprises a rack, a rotary cutter, a protective cover, a peculiar smell absorption mechanism, a circulating refrigeration mechanism and a transmission assembly. A feeding hopper communicated with the input end of the extruder and a die head communicated with the output end of the extruder are arranged on the extruder. The rotary cutter is connected with a mounting shaft, the mounting shaft is rotationally connected with the rack, the rotary cutter is attached to the end face of a discharge port of the die head, and a motor for driving the mounting shaft to rotate is arranged on the rack. The protective cover is connected with the die head, the die rotary cutter is located on the inner side of the protective cover, and the protective cover communicates with the discharging pipe. The input end of the flavor absorption mechanism is communicated with an exhaust pipe which is communicated with a discharge pipe. And the output end of the circulating refrigeration mechanism is sleeved outside the die head. The transmission assembly is in transmission connection with the mounting shaft, the odor absorption mechanism and the circulating refrigeration mechanism. When plastic is pelletized, the plastic peculiar smell is actively absorbed, the die head is circularly cooled, and the energy consumption is low.

Description

Technical Field

[0001] The utility model relates to the technical field of granulators, in particular to plastic extrusion granulation equipment. Background Art

[0002] Plastic pelletizing is a plastic recycling method that typically involves crushing, heating, extrusion, cooling, and drying, ultimately transforming discarded plastic products or raw materials into granular materials. Granular plastics are convenient for packaging, transport, and further processing. Existing extrusion pelletizing equipment often requires independent odor absorption mechanisms, resulting in high overall energy consumption.

[0003] The technical solution disclosed in the Chinese patent with authorization announcement number CN212372467U discharges the irritating odor from the extrusion tube, and the suction machine absorbs the irritating odor inside the curved plate through the suction pipe and the suction port, and discharges it to the external gas purification equipment from the outlet. By absorbing the irritating odor, the irritating odor is prevented from causing harm to the workers' bodies.

[0004] However, the device still has shortcomings: the odor adsorption structure of the device works alone, resulting in high energy consumption of the entire device, and the device lacks a cooling and temperature treatment mechanism for the extruder discharge die. As the equipment runs for a longer time, the temperature of the die head gradually increases, causing the output plastic rods to gradually soften, which in turn easily causes plastic to stick to the cutter when cutting the plastic rods. Utility Model Content

[0005] The purpose of the utility model is to solve the problems existing in the background technology and to provide a plastic extrusion granulation device.

[0006] The technical solution of the utility model is a plastic extrusion granulation device, which comprises a frame, an extruder is arranged on the frame, and a feed hopper connected to the input end and a die head connected to the output end of the extruder are arranged on the extruder.

[0007] The rotary cutter is connected to the mounting shaft, the mounting shaft is rotatably connected to the frame, the rotary cutter is in contact with and coaxial with the discharge port end face of the die head, and a motor for driving the mounting shaft and the rotary cutter to rotate is provided on the frame.

[0008] The protective cover is connected to the die head. The discharge port of the die head and the rotary cutter are both located on the inner side of the protective cover, and the protective cover is connected to the discharge pipe.

[0009] The odor absorption mechanism has an input end connected to the air extraction pipe, and the air extraction pipe is connected to the discharge pipe.

[0010] A circulating refrigeration mechanism, wherein the output end of the circulating refrigeration mechanism is sleeved on the outside of the die head.

[0011] And a transmission component, the transmission component is connected to the installation shaft, the odor absorption mechanism and the circulating refrigeration mechanism, so that when the rotary cutter rotates, the odor absorption mechanism is driven to absorb the odor in the protective cover, and at the same time the circulating refrigeration mechanism is driven to cool the die head.

[0012] Preferably, an inspection port is provided on the protective cover, and an inspection cover for controlling the switch of the inspection port is provided on the protective cover.

[0013] Preferably, the transmission assembly includes a pulley A, a pulley B and a toothed belt, the pulley A is coaxially connected to the mounting shaft of the rotary cutter, the pulley B is coaxially connected to the transmission shaft, and the pulley A and the pulley B are connected through a toothed belt transmission.

[0014] Preferably, the odor adsorption mechanism includes an absorption box and a mechanical fan. The absorption box and the mechanical fan are both connected to the frame. The adsorbent is stored in the absorption box. The absorption box is provided with an exhaust pipe. The output end of the exhaust pipe is inserted into the absorption box and is located below the liquid level. The discharge pipe is provided with an air collecting hood connected to the interior thereof. A filter is provided on the inner side of the opening of the air collecting hood. The output end of the air collecting hood is connected to the input end of the exhaust pipe. An air duct is provided at the input end of the mechanical fan. The air duct is inserted into the absorption box and is located above the liquid level. The output end of the mechanical fan is connected to the exhaust pipe. A turbine is provided in the mechanical fan. One end of the transmission shaft is inserted into the mechanical fan and is coaxially connected to the turbine.

[0015] Preferably, the circulating refrigeration mechanism includes a cooling tube and a sealing cover. A refrigerator is provided on the cooling tube, and an auger is coaxially provided inside the cooling tube. The auger is slidably connected to the inner wall of the cooling tube, and the end of the central axis of the auger is coaxially connected to the end of the transmission shaft. A lower water pipe and an upper water pipe are provided on the cooling tube, communicating with the interior of the cooling tube. The sealing cover is sleeved on the outer surface of the arc surface of the die head, and a serpentine channel is provided between the inner wall of the sealing cover and the outer wall of the arc surface of the die head. The ends of the lower water pipe and the upper water pipe away from the cooling tube are respectively connected to the corresponding ends of the serpentine channel.

[0016] Preferably, the cooling pipe, the downpipe, the uppipe and the serpentine channel are filled with heat transfer oil.

[0017] Preferably, the refrigerator is a semiconductor refrigerator, and the cold end of the semiconductor refrigerator is in contact with the outer wall of the cooling tube, and the hot end of the semiconductor refrigerator is connected to the heat dissipation fin.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] By setting an odor absorption mechanism, a circulating refrigeration mechanism and a transmission component, and utilizing the transmission component to connect the mounting shaft, the odor absorption mechanism and the circulating refrigeration mechanism, when the rotary cutter is working, the transmission mechanism drives the turbine of the mechanical fan to rotate, so that the plastic odor in the discharge pipe enters the absorption box under the action of the mechanical fan, and the odor components are absorbed by the adsorbent in the absorption box. The adsorbent includes but is not limited to chemical absorbents. After the odor components in the air are absorbed, they will not cause harm to the human body; while the rotary cutter is working, it drives the auger to rotate, and the rotation of the auger pushes the heat transfer oil in the cooling pipe to circulate in the serpentine channel, thereby promoting the cooling of the die head. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0021] Figure 2 Schematic diagram of the connection structure of various components on the die head;

[0022] Figure 3 Schematic diagram of the connection structure between the rotary cutter, the absorption box, the discharge pipe and the cooling pipe;

[0023] Figure 4 Schematic diagram of the internal structure of the cooling pipe.

[0024] Figure markings: 1. frame; 2. extruder; 3. feed hopper; 4. die head; 5. rotary cutter; 6. motor; 7. protective cover; 71. inspection cover; 8. discharge pipe; 9. air collecting hood; 10. absorption box; 11. mechanical fan; 111. transmission shaft; 12. exhaust pipe; 13. exhaust hood; 14. exhaust pipe; 15. transmission assembly; 16. cooling pipe; 17. refrigerator; 18. auger; 19. sewer pipe; 20. water supply pipe; 21. sealing cover; 211. serpentine channel. DETAILED DESCRIPTION

[0025] Example 1

[0026] As shown in the figure, the utility model proposes a plastic extrusion granulation equipment, which includes a frame 1, a rotary cutter 5, a protective cover 7, a transmission assembly 15, an odor absorption mechanism and a circulating refrigeration mechanism. An extruder 2 is provided on the frame 1, and a feed hopper 3 connected to its input end and a die head 4 connected to its output end are provided on the extruder 2. The rotary cutter 5 is connected to the mounting shaft, and the mounting shaft is rotatably connected to the frame 1. The rotary cutter 5 is in contact with and coaxial with the discharge port end face of the die head 4. A motor 6 for driving the mounting shaft and the rotary cutter 5 to rotate is provided on the frame 1. An inspection port is provided on the protective cover 7, and an inspection cover 71 for controlling the inspection port switch is provided on the protective cover 7. The protective cover 7 is connected to the die head 4, and the discharge port of the die head 4 and the rotary cutter 5 are both located on the inner side of the protective cover 7, and the protective cover 7 is connected to the discharge pipe 8. The transmission assembly 15 includes a pulley A, a pulley B, and a toothed belt. Puller A is coaxially connected to the mounting shaft of the rotary cutter 5, and pulley B is coaxially connected to the transmission shaft 111. Pullers A and B are connected via a toothed belt transmission. The odor adsorption mechanism includes an absorption box 10 and a mechanical fan 11. The absorption box 10 and the mechanical fan 11 are both connected to the frame 1. The absorption box 10 stores adsorbent. An exhaust pipe 14 is provided on the absorption box 10. The output end of the exhaust pipe 14 is inserted into the absorption box 10 and is located below the liquid level. An air collecting hood 9 is provided on the discharge pipe 8 and is connected to the interior thereof. A filter is provided on the inner side of the opening of the air collecting hood 9. The output end of the air collecting hood 9 is connected to the input end of the exhaust pipe 14. An air duct is provided at the input end of the mechanical fan 11. The air duct is inserted into the absorption box 10 and is located above the liquid level. The output end of the mechanical fan 11 is connected to the exhaust pipe 12. A turbine is provided inside the mechanical fan 11. One end of the transmission shaft 111 is inserted into the mechanical fan 11 and is coaxially connected to the turbine. The input end is connected to the exhaust pipe 14. The circulating refrigeration mechanism includes a cooling pipe 16 and a sealing cover 21. A refrigerator 17 is provided on the cooling pipe 16. The refrigerator 17 is a semiconductor refrigerator, and the cold end of the semiconductor refrigerator is in contact with the outer wall of the cooling pipe 16, and the hot end of the semiconductor refrigerator is connected to the heat dissipation fins. An auger 18 is coaxially provided in the cooling pipe 16. The auger 18 is slidably connected to the inner wall of the cooling pipe 16, and the central axis end of the auger 18 is coaxially connected to the end of the transmission shaft 111. A downpipe 19 and an uppipe 20 connected to the interior of the cooling pipe 16 are provided. The sealing cover 21 is sleeved on the outside of the arc surface of the die head 4. A serpentine channel 211 is provided between the inner wall of the sealing cover 21 and the outer wall of the arc surface of the die head 4. The ends of the downpipe 19 and the uppipe 20 away from the cooling pipe 16 are respectively connected to the corresponding ends of the serpentine channel 211. The cooling pipe 16 , the downpipe 19 , the uppipe 20 and the serpentine channel 211 are filled with heat transfer oil.

[0027] In this embodiment, raw materials are fed into the extruder 2 from the feed hopper 3. After being subjected to high-temperature treatment, the extruder 2 extrude the raw materials along the die head 3. The rotary cutter 5 rotates under the drive of the motor 6, thereby cutting off the portion of the plastic strip extending out of the die head 4 to form fine particles. During the rotation of the rotary cutter 5, the toothed belt drive drives the transmission shaft 111 to rotate, thereby driving the turbine of the mechanical fan 11 to rotate. When the mechanical fan 11 is working, air is drawn from the protective cover 7. The odorous components in the gas are sucked into the absorption box 10 and merged or reacted with the adsorbent in the absorption box 10. The mechanical fan 11 then discharges the odorless gas. In addition, as the transmission shaft 111 rotates, the transmission shaft 111 drives the auger 18 to rotate. The auger 18 pushes the low-temperature heat transfer oil in the cooling pipe 16 along the upper water pipe 20 into the serpentine channel 211 and then flows back through the lower water pipe 19 into the cooling pipe 16, thereby avoiding the high temperature of the die head 4 and promoting the solidification of the plastic rod at the outlet of the die head 4.

[0028] Example 2

[0029] like Figure 1 、 Figure 3 and Figure 4 As shown, in the plastic extrusion granulation equipment proposed by the present invention, compared with the first embodiment, the output end of the exhaust pipe 12 is connected to the exhaust cover 13, and the air outlet of the exhaust cover 13 faces the heat dissipation fins.

[0030] In this embodiment, when the mechanical fan 11 is in operation, the exhaust pipe 12 exhausts air, and the exhausted air blows toward the heat dissipation fins, effectively improving the heat dissipation efficiency of the heat dissipation fins.

[0031] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A plastic extrusion granulation equipment, characterized in that, include A frame (1), an extruder (2) is arranged on the frame (1), and a feed hopper (3) connected to the input end and a die head (4) connected to the output end of the extruder (2) are arranged on the extruder (2); The rotary cutter (5) is connected to a mounting shaft, the mounting shaft is rotatably connected to the frame (1), the rotary cutter (5) is in contact with and coaxial with the discharge port end face of the die head (4), and a motor (6) is provided on the frame (1) for driving the mounting shaft and the rotary cutter (5) to rotate; A protective cover (7) is connected to the die head (4), the discharge port of the die head (4) and the rotary cutter (5) are both located on the inner side of the protective cover (7), and the protective cover (7) is connected to the discharge pipe (8); An odor absorption mechanism, wherein the input end of the odor absorption mechanism is connected to an air extraction pipe (14), and the air extraction pipe (14) is connected to a discharge pipe (8); A circulating refrigeration mechanism, wherein the output end of the circulating refrigeration mechanism is sleeved on the outside of the die head (4); And a transmission assembly (15), the transmission assembly (15) is connected to the installation shaft, the odor absorption mechanism and the circulating refrigeration mechanism, so that when the rotary cutter (5) rotates, the odor absorption mechanism is driven to absorb the odor in the protective cover (7), and at the same time, the circulating refrigeration mechanism is driven to cool the die head (4).

2. A plastic extrusion granulation equipment according to claim 1, characterized in that, An inspection port is provided on the protective cover (7), and an inspection cover (71) for controlling the opening and closing of the inspection port is provided on the protective cover (7).

3. A plastic extrusion granulation equipment according to claim 1, characterized in that, The transmission assembly (15) includes a pulley A, a pulley B and a toothed belt. The pulley A is coaxially connected to the installation shaft of the rotary cutter (5), the pulley B is coaxially connected to the transmission shaft (111), and the pulley A and the pulley B are connected through a toothed belt transmission.

4. A plastic extrusion granulation equipment according to claim 3, characterized in that, The odor adsorption mechanism comprises an absorption box (10) and a mechanical fan (11); the absorption box (10) and the mechanical fan (11) are both connected to the frame (1); an adsorbent is stored in the absorption box (10); an exhaust pipe (14) is provided on the absorption box (10); the output end of the exhaust pipe (14) is inserted into the absorption box (10) and is located below the liquid level; an air collecting hood (9) is provided on the discharge pipe (8) and is connected to the interior of the discharge pipe (8); a filter is provided on the inner side of the opening of the air collecting hood (9); the output end of the air collecting hood (9) is connected to the input end of the exhaust pipe (14); an air guide duct is provided at the input end of the mechanical fan (11); the air guide duct is inserted into the absorption box (10) and is located above the liquid level; the output end of the mechanical fan (11) is connected to the exhaust pipe (12); a turbine is provided in the mechanical fan (11); one end of a transmission shaft (111) is inserted into the mechanical fan (11) and is coaxially connected to the turbine.

5. The plastic extrusion granulation equipment according to claim 3, characterized in that: A circulating refrigeration mechanism comprises a cooling pipe (16) and a sealing cover (21); a refrigerator (17) is arranged on the cooling pipe (16); an auger (18) is coaxially arranged in the cooling pipe (16); the auger (18) is slidably connected to the inner wall of the cooling pipe (16), and the central axis end of the auger (18) is coaxially connected to the end of the transmission shaft (111); a lower water pipe (19) and an upper water pipe (20) are arranged on the cooling pipe (16) and are communicated with the interior thereof; the sealing cover (21) is sleeved on the outer side of the arc surface of the die head (4); a serpentine channel (211) is arranged between the inner wall of the sealing cover (21) and the outer wall of the arc surface of the die head (4); and the ends of the lower water pipe (19) and the upper water pipe (20) away from the cooling pipe (16) are respectively communicated with the corresponding ends of the serpentine channel (211).

6. The plastic extrusion granulation equipment according to claim 5, characterized in that: The cooling pipe (16), the lower water pipe (19), the upper water pipe (20) and the serpentine channel (211) are filled with heat-conducting oil.

7. The plastic extrusion granulation equipment according to claim 5, characterized in that: The refrigerator (17) is a semiconductor refrigerator, and the cold end of the semiconductor refrigerator is in contact with the outer wall of the cooling tube (16), and the hot end of the semiconductor refrigerator is connected to the heat dissipation fin.

Images