A plastic particle roasting device

Abstract

The utility model relates to solid material drying equipment technical field discloses a kind of plastic particle baking device, comprising: frame;Drum assembly, be in frame, drum assembly includes drum, the baffle ring and conveying blade being located in drum, baffle ring is separated and is presented multiple intervals to drum, drum has inlet and outlet;Driving assembly, be in frame and be located the side measurement of drum assembly, driving assembly is transmission connection with drum assembly;Telescopic component, including being located in the main shaft of drum, locking piece, sleeve, first sliding part and second sliding part being located in frame, one end of main shaft is installed in sleeve by locking piece, the other end of main shaft extends out and is connected with first sliding part, the end of sleeve away from main shaft extends out and is connected with second sliding part;And multiple heating units, be installed in main shaft and sleeve.The plastic particle baking device of the utility model is convenient for the maintenance of heating unit, and reduce the occupancy of space.

Description

Technical Field

[0001] This utility model relates to the field of solid material drying equipment, and in particular to a plastic granule baking device. Background Technology

[0002] Plastic granules have a wide range of applications. In daily life, they can be used to manufacture various plastic bags, buckets, basins, toys, furniture, stationery, and other household items and plastic products. In the clothing industry, they can be used to manufacture clothing, ties, buttons, and zippers. In the building materials industry, they are used to manufacture various building components and plastic doors and windows. Plastic granules require heating and drying during processing. Current drying equipment, because the heater is located inside the container, is inconvenient to maintain, requiring disassembly of the entire structure and occupying a large space for repairs. Utility Model Content

[0003] The purpose of this invention is to provide a plastic granule baking device that facilitates the maintenance of the heating unit and reduces space occupation.

[0004] To achieve the above objectives, this utility model provides a plastic granule baking device, comprising:

[0005] frame;

[0006] A roller assembly is disposed on the frame. The roller assembly includes a roller, a retaining ring disposed within the roller, and conveying blades. The retaining ring divides the roller into multiple sections. The roller has an inlet and an outlet.

[0007] A drive assembly is disposed on the frame and located beside the roller assembly, and the drive assembly is connected to the roller assembly in a transmission manner;

[0008] A telescopic assembly includes a main shaft disposed on the roller, a locking member, a sleeve, and a first sliding member and a second sliding member disposed on the frame. One end of the main shaft is mounted inside the sleeve via the locking member, and the other end of the main shaft extends out of the inlet and connects to the first sliding member. The end of the sleeve away from the main shaft extends out of the outlet and connects to the second sliding member. The locking member is used to lock or release the main shaft and the sleeve.

[0009] Multiple heating units are installed on the main shaft and the sleeve, and each of the intervals has at least one heating unit.

[0010] In some embodiments, the locking element includes a ring electromagnet and a plurality of magnetic attraction units disposed on the outer periphery of the ring electromagnet. The ring electromagnet is mounted on the peripheral wall of the spindle. Each magnetic attraction unit includes a spring, a slide rod, and a magnetic metal block. One end of the slide rod is fixed to the ring electromagnet, and the other end of the slide rod is slidably connected to the magnetic metal block. The spring is sleeved on the outer periphery of the slide rod, and both ends of the spring are respectively connected to the ring electromagnet and the magnetic metal block. When in the locked state, the elastic force generated by the spring causes the magnetic metal block to abut against the inner wall of the sleeve. When in the released state, the ring electromagnet magnetically attracts the magnetic metal block, causing the spring to be compressed, and the magnetic metal block to separate from the inner wall of the sleeve.

[0011] In some embodiments, a feeding mechanism is included, which includes a hopper, a dynamic metering device, a level sensor, a feed pipe, and a first butterfly valve. The hopper is installed on the frame, the dynamic metering device and the level sensor are located in the hopper, the first butterfly valve is installed on the feed pipe, the upper end of the feed pipe is connected to the hopper, and the lower end of the feed pipe extends into the roller.

[0012] In some embodiments, a discharge mechanism is included, which includes a trough, a second butterfly valve, and a material sensor. The trough is mounted on the frame and circumferentially sleeved around the outlet of the roller. The second butterfly valve and the material sensor are mounted on the bottom of the trough.

[0013] In some embodiments, the discharge mechanism includes a dynamic sealing ring, which is circumferentially disposed at the connection between the roller and the trough. One end of the dynamic sealing ring is fixed to the outer peripheral wall of the roller or the trough, and the other end of the dynamic sealing ring abuts against the outer peripheral wall of the trough or the roller. The dynamic sealing ring includes an inner layer, an insulation layer, and an outer layer.

[0014] In some embodiments, the drive assembly includes a motor mounted on the frame, a lower support roller, an upper support roller, a limit roller, a proximity switch, and a gear ring mounted on the outer peripheral wall of the roller. The output end of the motor is connected to the gear ring via a gear. The upper support roller abuts against the upper part of the roller, the lower support roller abuts against the lower part of the roller, and two limit rollers are provided, each abutting against one end of the roller. The proximity switch is used to detect the position of the roller.

[0015] In some embodiments, the roller assembly includes a maintenance cover, the roller having an access port, and the maintenance cover covering the access port.

[0016] In some embodiments, the heating unit includes a frame and a heating tube disposed within the frame. The frame has an air inlet channel and an air outlet channel. The air inlet channels of each heating unit are connected in sequence, and the air outlet channels of each heating unit are connected in sequence.

[0017] In some embodiments, a blower and an exhaust fan are mounted on the frame, the blower being connected to the air inlet channel and the exhaust fan being connected to the air outlet channel.

[0018] In some embodiments, the telescopic assembly includes a slide rail mounted on the frame, a first drive unit, and a second drive unit. The first and second sliding members are slidably connected to both ends of the slide rail. The first drive unit is used to drive the main shaft to slide along the slide rail, and the second drive unit is used to drive the sleeve to slide along the slide rail.

[0019] This utility model provides a plastic granule baking device, which has the following advantages compared with the prior art:

[0020] The telescopic assembly includes a main shaft, a locking element, a sleeve, and a first and second sliding element disposed on the frame. One end of the main shaft is mounted inside the sleeve via the locking element, and the other end of the main shaft extends out through the inlet and connects to the first sliding element. The end of the sleeve away from the main shaft extends out through the outlet and connects to the second sliding element. The locking element is used to lock or release the main shaft and the sleeve. Multiple heating units are installed on the main shaft and the sleeve, and each section has at least one heating unit. Thus, when the main shaft and the sleeve are in the released state, the main shaft and the sleeve are pulled out along the inlet and outlet of the roller, respectively. At this time, the heating units move to the outside of the roller along with the main shaft and the sleeve, allowing direct maintenance or repair of the heating units disposed on the outer surface of the main shaft or the sleeve, thus facilitating the maintenance of the heating units. Furthermore, the main shaft and the sleeve are pulled out simultaneously in opposite directions, which reduces the space occupied compared to pulling them out in the same direction. Attached Figure Description

[0021] Figure 1 A three-dimensional structural diagram of the plastic granule baking device provided in the embodiment of this utility model.

[0022] Figure 2 This is a three-dimensional cross-sectional structural diagram of the plastic granule baking device provided in an embodiment of the present invention.

[0023] Figure 3 This is a partially enlarged structural diagram of the inside of the drum of the plastic granule baking device provided in an embodiment of the present invention.

[0024] Figure 4 A partially enlarged three-dimensional structural diagram of the drum of the plastic granule baking device provided in this embodiment of the utility model.

[0025] Figure 5 A schematic diagram of the installation structure of the drive assembly of the plastic granule baking device provided in this embodiment of the utility model.

[0026] Figure 6 This is a top view of the telescopic component of the plastic granule baking device provided in an embodiment of the present invention.

[0027] Figure 7 This is an enlarged structural diagram of the locking component of the plastic granule baking device provided in an embodiment of the present invention.

[0028] Figure 8 This is a front view of the telescopic component of the plastic granule baking device provided in an embodiment of the present invention.

[0029] Figure 9 This is an enlarged schematic diagram of the internal structure of the heating unit of the plastic granule baking device provided in this embodiment of the utility model.

[0030] Figure 10 This is an enlarged structural diagram of the feeding mechanism of the plastic granule baking device provided in an embodiment of the present invention.

[0031] Figure 11 This is a three-dimensional enlarged structural diagram of the discharge mechanism of the plastic granule baking device provided in the embodiment of this utility model.

[0032] Figure 12 This is a front view enlarged structural diagram of the discharge mechanism of the plastic granule baking device provided in an embodiment of the present utility model.

[0033] Figure 13 This is a front view structural diagram of the blower and exhaust fan installation of the plastic granule baking device provided in this embodiment of the utility model.

[0034] In the diagram: 1. Frame; 2. Roller assembly; 21. Roller; 22. Retaining ring; 23. Conveyor blade; 24. Section; 25. Inlet; 26. Outlet; 27. Inspection cover; 28. Inspection port; 3. Drive assembly; 31. Motor; 32. Lower support roller; 33. Upper support roller; 34. Limiting roller; 35. Proximity switch; 36. Gear ring; 4. Telescopic assembly; 41. Main shaft; 42. Locking element; 421. Ring electromagnet; 422. Magnetic attraction unit; 4221. Spring; 4222. Slide rod; 4223. Magnetic metal block; 4 3. Sleeve; 44. First sliding member; 45. Second sliding member; 46. Slide rail; 47. First drive unit; 48. Second drive unit; 5. Heating unit; 51. Frame; 52. Heating tube; 53. Air inlet channel; 54. Air outlet channel; 6. Feeding mechanism; 61. Feeding hopper; 62. Dynamic metering device; 63. Material level sensor; 64. Feeding pipe; 65. First butterfly valve; 7. Discharge mechanism; 71. Material trough; 72. Second butterfly valve; 73. Material sensor; 74. Dynamic sealing ring; 8. Blower; 9. Exhaust fan. Detailed Implementation

[0035] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0036] It should be understood that in the description of this application, the terms "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. That is, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, unless otherwise stated, "a plurality of" means two or more.

[0037] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0038] like Figures 1-13As shown, the plastic granule baking device of this embodiment includes: a frame 1, a roller assembly 2, a drive assembly 3, a telescopic assembly 4, and multiple heating units 5. The heating units 5 are used to heat the plastic granules inside the roller assembly 2, and the drive assembly 3 is used to drive the roller assembly 2 to rotate, ensuring uniform heating of the plastic granules. When maintenance is required, the heating units 5 can be extended from both ends of the roller assembly 2 by stretching the telescopic assembly 4, thus facilitating maintenance of the heating units and reducing space occupation.

[0039] The roller assembly 2 is mounted on the frame 1. The roller assembly 2 includes a roller 21, retaining rings 22 disposed within the roller 21, and conveying blades 23. The retaining rings 22 divide the roller 21 into multiple sections 24. The roller 21 has an inlet 25 and an outlet 26. Thus, when the roller 21 rotates, the conveying blades 23 can carry the plastic granules entering through the inlet 25 through each retaining ring 22 and out through the outlet 26, and also have the function of mixing the plastic granules, resulting in uniform heating of the plastic granules. The retaining rings 22 dividing the roller 21 into multiple sections 24 facilitates zoned heating of the plastic granules.

[0040] The drive assembly 3 is located on the frame 1 and to the side of the roller assembly 2, and the drive assembly 3 is connected to the roller assembly 2 in a transmission manner.

[0041] To ensure thorough and uniform heating of the plastic granules, during operation, the plastic granules are fed into the inlet 25. The drive assembly 3 is activated to rotate the drum 21 forward. At this time, the back of the conveying blades 23 contacts the plastic granules, causing them to mix and flow. The plastic granules are uniformly heated in a section 24 near the inlet 25. After a predetermined time, the drive assembly 3 is adjusted to rotate the drum 21 in reverse. At this time, the front of the conveying blades 23 contacts the plastic granules, conveying them to the next section 24 for heating. After the plastic granules have been conveyed, the drive assembly 3 is adjusted to rotate the drum 21 forward again, and the plastic granules continue to be fed from the inlet 25. The above steps are repeated until the plastic granules are uniformly heated in all four sections 24 and then discharged from the outlet 26.

[0042] The telescopic assembly 4 includes a main shaft 41 mounted on the roller, a locking element 42, a sleeve 43, and a first sliding element 44 and a second sliding element 45 mounted on the frame 1. One end of the main shaft 41 is installed inside the sleeve 43 via the locking element 42, and the other end of the main shaft 41 extends into an inlet 25 and connects to the first sliding element 44. The end of the sleeve 43 away from the main shaft 41 extends into an outlet 26 and connects to the second sliding element 45. The locking element 42 is used to lock or release the main shaft 41 and the sleeve 43. Specifically, the locked state means that the main shaft 41 and the sleeve 43 are fixed in position to maintain structural stability; the released state means that the main shaft 41 and the sleeve 43 can slide relative to each other to facilitate the extension of the heating unit 5 from the roller 21. Both the first sliding element 44 and the second sliding element 45 are slidably mounted on the frame 1.

[0043] Multiple heating units 5 are mounted on the spindle 41 and the sleeve 43, and each section 24 has at least one heating unit 5. This allows each heating unit 5 to independently control the heating temperature of each section 24. Furthermore, each section 24 is equipped with a temperature sensor to accurately acquire temperature information for each section 24.

[0044] like Figure 6 and 7 As shown, in some embodiments, the locking member 42 includes an annular electromagnet 421 and a plurality of magnetic attraction units 422 disposed on the outer periphery of the annular electromagnet. The annular electromagnet 421 is mounted on the peripheral wall of the main shaft 41. The magnetic attraction unit 422 includes a spring 4221, a slide rod 4222 and a magnetic metal block 4223. One end of the slide rod 4222 is fixed to the annular electromagnet 421, and the other end of the slide rod 4222 is slidably connected to the magnetic metal block 4223. Specifically, the magnetic metal block 4223 has a groove to accommodate the slide rod 4222, and when the magnetic metal block 4223 is subjected to force, the slide rod 4222 can slide relative to the magnetic metal block 4223 in the groove. Spring 4221 is sleeved on the outer circumference of slide rod 4222. Both ends of spring 4221 are connected to annular electromagnet 421 and magnetic metal block 4223, respectively. In the locked state, annular electromagnet 421 is not energized, and the elastic force generated by spring 4221 causes magnetic metal block 4223 to abut against the inner wall of sleeve 43. In the released state, annular electromagnet 421 is energized, and the magnetic attraction of annular electromagnet 421 to magnetic metal block 4223 compresses spring 4221, causing magnetic metal block 4223 to separate from the inner wall of sleeve 43.

[0045] like Figure 10 As shown, in some embodiments, the plastic granule baking device includes a feeding mechanism 6, which includes a hopper 61, a dynamic metering device 62, a level sensor 63, a feeding pipe 64, and a first butterfly valve 65. The hopper 61 is mounted on a frame, the dynamic metering device 62 and the level sensor 63 are located in the hopper 61, and the first butterfly valve 65 is mounted on the feeding pipe 64. The upper end of the feeding pipe 64 is connected to the hopper 61, and the lower end of the feeding pipe 64 extends into the inlet 25 located in the drum 21. The dynamic metering device 62 uses a weighing sensor to weigh the plastic granules in the hopper 61; the level sensor 63 is used to detect the position of the plastic granules in the hopper 61; and the first butterfly valve 65 is used to control whether the feeding pipe 64 feeds plastic granules into the drum 21.

[0046] like Figure 11As shown, in some embodiments, the plastic granule baking device includes a discharge mechanism 7, which includes a trough 71, a second butterfly valve 72, and a material sensor 73. The trough 71 is mounted on the frame 1 and circumferentially sleeved around the outlet 26 of the roller 21. The second butterfly valve 72 and the material sensor 73 are mounted at the bottom of the trough. The trough 71 collects the plastic granules discharged from the outlet 26 of the roller 21. The material sensor 73 is a photoelectric sensor used to detect the discharge status of the material. The second butterfly valve 72 is used to control whether to discharge the heated plastic granules from the trough 71. It should be noted that the end of the sleeve 43 away from the main shaft 41 extends beyond the outlet 26 and continues to extend into the middle through-hole of the discharge trough 71.

[0047] like Figure 12 As shown, in some embodiments, the discharge mechanism 7 includes a dynamic sealing ring 74, which is circumferentially disposed at the connection between the roller 21 and the material trough 71. One end of the dynamic sealing ring 74 is fixed to the outer peripheral wall of the material trough 71, and the other end of the dynamic sealing ring 74 abuts against the outer peripheral wall of the roller 21. Alternatively, one end of the dynamic sealing ring 74 abuts against the outer peripheral wall of the material trough 71, and the other end of the dynamic sealing ring 74 is fixed to the outer peripheral wall of the roller 21. In this way, the rotation of the roller 21 relative to the material trough 71 is not affected. The dynamic sealing ring 74 includes an inner layer, an insulation layer, and an outer layer. The inner and outer layers can be made of high-temperature resistant rubber, such as silicone rubber; for example, the insulation layer is made of inorganic insulation material. Thus, during the rotation of the roller 21 relative to the material trough 71, the dynamic sealing ring 74 can still maintain its sealing performance, thereby reducing heat loss at the connection between the roller 21 and the material trough 71.

[0048] like Figure 5 In some embodiments, the drive assembly 3 includes a motor 31 mounted on the frame 1, a lower support roller 32, an upper support roller 33, a limiting roller 34, a proximity switch 35, and a gear ring 36 mounted on the outer peripheral wall of the roller 21. The output end of the motor 31 is connected to the gear ring 36 via gears. The outer periphery of the roller 21 has multiple support rings. The upper support roller 33 abuts against the upper part of the support ring of the roller 21, the lower support roller 32 abuts against the lower part of the support ring of the roller 21, and the limiting roller 34 has two supporting rings that abut against the two ends of the roller 21 respectively. The proximity switch 35 is used to detect the position of the roller 21. When the roller 21 deviates from the normal position, it should be stopped for maintenance. Thus, the motor 31 drives the gear ring 36 to rotate the roller 21. The lower support roller 32 and the upper support roller 33 can limit the circumferential position of the roller 21 during rotation; the limiting roller 34 can limit the lateral position of the roller 21 during rotation.

[0049] like Figure 4As shown, in some embodiments, the roller assembly 2 includes a maintenance cover 27, and the roller 21 has a maintenance port 28. The maintenance cover 27 is disposed over the maintenance port 28 to facilitate opening or closing the maintenance port 28. Thus, when needed, the maintenance cover 27 can be opened to perform maintenance on the interior of the roller 21 through the maintenance port 28.

[0050] like Figure 9 As shown, in some embodiments, the heating unit 5 includes a frame 51 and a heating tube 52 disposed within the frame 51. The frame 51 has an air inlet channel 53 and an air outlet channel 54. The air inlet channels 53 of each heating unit 5 are connected in sequence, and the air outlet channels 54 of each heating unit 5 are connected in sequence. Specifically, the air inlet channel 53 and the air outlet channel 54 adopt a diversion structure to ensure that the air is evenly blown onto the heating tube 52, preventing the heating unit 5 from being damaged by excessively high local temperatures. The air outlet channel 54 is arranged on both sides of the air inlet channel 53, which can discharge the volatilized VOC gas and at the same time prevent excessive low-temperature air from contacting the material, reducing heating efficiency and reducing heat loss. In addition, the heating tube 52 heats the internal space of the frame 51. The air inlet channel 53 and the air outlet channel 54 are connected to the internal space of the drum 21. Therefore, the exhaust gas and water vapor generated during the heating process can be discharged through the air outlet channel 54, while the air inlet channel 53 can introduce fresh air.

[0051] like Figure 9 and 13 As shown, in some embodiments, the plastic pellet baking apparatus includes a blower 8 and an exhaust fan 9 mounted on the frame 1. The blower 8 is connected to the air inlet channel 53, and the exhaust fan 9 is connected to the air outlet channel 54. The blower 8 and the exhaust fan 9 can improve the efficiency of air exchange in the drum 21.

[0052] like Figure 8 As shown, in some embodiments, the telescopic assembly 4 includes a slide rail 46 mounted on the frame 1, a first drive unit 47, and a second drive unit 48. A first sliding member 44 and a second sliding member 45 are correspondingly disposed at both ends of the slide rail 46, and the first sliding member 44 and the second sliding member 45 can slide outwards along both ends of the slide rail 46. The first drive unit 47 is used to drive the main shaft 41 to slide along the slide rail 46, and the second drive unit 48 is used to drive the sleeve 43 to slide along the slide rail 46. Specifically, both the first drive unit 47 and the second drive unit 48 use a motor-driven worm gear to achieve linear transmission.

[0053] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A plastic granule baking device, characterized in that, include: Framework (1); A roller assembly (2) is provided on the frame (1). The roller assembly (2) includes a roller (21), a retaining ring (22) provided in the roller (21), and a conveying blade (23). The retaining ring (22) divides the roller (21) into multiple sections (24). The roller (21) has an inlet (25) and an outlet (26). A drive assembly (3) is provided on the frame (1) and located beside the roller assembly, and the drive assembly (3) is connected to the roller assembly (2) in a transmission manner; The telescopic assembly (4) includes a main shaft (41) disposed on the roller (21), a locking member (42), a sleeve (43), a first sliding member (44) and a second sliding member (45) disposed on the frame (1). One end of the main shaft (41) is installed in the sleeve (43) through the locking member (42), and the other end of the main shaft (41) extends out of the inlet (25) and connects to the first sliding member (44). The end of the sleeve (43) away from the main shaft (41) extends out of the outlet (26) and connects to the second sliding member (45). The locking member (42) is used to keep the main shaft (41) and the sleeve (43) in a locked or unlocked state. as well as Multiple heating units (5) are mounted on the main shaft (41) and the sleeve (43), and each of the intervals (24) has at least one heating unit (5).

2. The plastic granule baking apparatus according to claim 1, characterized in that, The locking element (42) includes a ring electromagnet (421) and a plurality of magnetic attraction units (422) disposed on the outer periphery of the ring electromagnet (421). The ring electromagnet (421) is mounted on the peripheral wall of the main shaft (41). The magnetic attraction unit (422) includes a spring (4221), a slide rod (4222), and a magnetic metal block (4223). One end of the slide rod (4222) is fixed to the ring electromagnet (421), and the other end of the slide rod (4222) is slidably connected to the magnetic metal block (4223). The spring (4221) is sleeved on... Located on the outer periphery of the slide bar (4222), the two ends of the spring (4221) are respectively connected to the annular electromagnet (421) and the magnetic metal block (4223); when in the locked state, the elastic force generated by the spring (4221) causes the magnetic metal block (4223) to abut against the inner wall of the sleeve (43); when in the released state, the annular electromagnet (421) magnetically attracts the magnetic metal block (4223), causing the spring (4221) to be compressed, and the magnetic metal block (4223) to separate from the inner wall of the sleeve (43).

3. The plastic granule baking apparatus according to claim 1, characterized in that, The feeding mechanism (6) includes a hopper (61), a dynamic metering device (62), a level sensor (63), a feed pipe (64), and a first butterfly valve (65). The hopper (61) is installed on the frame (1). The dynamic metering device (62) and the level sensor (63) are located in the hopper (61). The first butterfly valve (65) is installed in the feed pipe (64). The upper end of the feed pipe (64) is connected to the hopper (61), and the lower end of the feed pipe (64) extends into the inlet (25) located in the roller (21).

4. The plastic granule baking apparatus according to claim 1, characterized in that, The material discharge mechanism (7) includes a material trough (71), a second butterfly valve (72) and a material sensor (73). The material trough (71) is installed on the frame (1) and circumferentially sleeved on the outlet (26) of the roller (21). The second butterfly valve (72) and the material sensor (73) are installed at the bottom of the material trough (71).

5. The plastic granule baking apparatus according to claim 4, characterized in that, The discharge mechanism (7) includes a dynamic sealing ring (74), which is circumferentially disposed at the connection between the roller (21) and the material trough (71). One end of the dynamic sealing ring (74) is fixed to the outer peripheral wall of the roller (21) or the material trough (71), and the other end of the dynamic sealing ring (74) abuts against the outer peripheral wall of the material trough (71) or the roller (21). The dynamic sealing ring (74) includes an inner layer, an insulation layer and an outer layer.

6. The plastic granule baking apparatus according to claim 1, characterized in that, The drive assembly (3) includes a motor (31), a lower support roller (32), an upper support roller (33), a limiting roller (34), a proximity switch (35), and a gear ring (36) mounted on the outer peripheral wall of the roller (21). The output end of the motor (31) is connected to the gear ring (36) through gear meshing. The upper support roller (33) abuts against the upper part of the roller (21), the lower support roller (32) abuts against the lower part of the roller (21), and there are two limiting rollers (34) which abut against the two ends of the roller (21) respectively. The proximity switch (35) is used to detect the position of the roller (21).

7. The plastic granule baking apparatus according to claim 1, characterized in that, The roller assembly (2) includes a maintenance cover (27), the roller (21) has a maintenance port (28), and the maintenance cover (27) covers the maintenance port (28).

8. The plastic granule baking apparatus according to claim 1, characterized in that, The heating unit (5) includes a frame (51) and a heating tube (52) disposed in the frame (51). The frame (51) has an air inlet channel (53) and an air outlet channel (54). The air inlet channels (53) of each heating unit (5) are connected in sequence, and the air outlet channels (54) of each heating unit (5) are connected in sequence.

9. The plastic granule baking apparatus according to claim 8, characterized in that, Includes a blower (8) and an exhaust fan (9) installed on the frame (1), the blower (8) being connected to the air inlet channel (53) and the exhaust fan (9) being connected to the air outlet channel (54).

10. The plastic granule baking apparatus according to claim 1, characterized in that, The telescopic assembly (4) includes a slide rail (46) mounted on the frame (1), a first drive unit (47) and a second drive unit (48). The first sliding member (44) and the second sliding member (45) are slidably connected to both ends of the slide rail (46). The first drive unit (47) is used to drive the main shaft (41) to slide along the slide rail (46), and the second drive unit (48) is used to drive the sleeve (43) to slide along the slide rail (46).

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