Hot air melting plastic recycling granulator

Abstract

The invention discloses a hot air melting plastic recycling granulator, which comprises a box body and a feed port arranged at the upper end of the box body, and further comprises a heat conduction bin rotationally arranged in the box body, and a ventilation gap is reserved between the outer wall of the heat conduction bin and the inner wall of the box body; the multiple pneumatic blades are arranged on the circumference of the outer wall of the heat conduction bin; the circulating pipe is fixedly arranged on the outer side of the box body, a first air opening and a second air opening are formed in the upper end and the lower end of the circulating pipe correspondingly, the first air opening communicates with the upper end in the box body, and the second air opening communicates with the lower end in the box body and points to the pneumatic blades; and the fan assembly is arranged in the middle of the circulating pipe and used for driving the circulating pipe to ventilate. The fan assembly drives the circulating pipe to generate hot air flow, the hot air flow is exhausted through the first air opening and blown through the second air opening, and the second air opening blows the hot air to the surface of the heat conduction bin to heat the heat conduction bin and further heat plastic waste on one hand, and blows the pneumatic blades on the other hand, so that the heat conduction bin rotates to be evenly heated.

Description

Technical Field

[0001] The invention relates to the technical field of plastic recycling, in particular to a hot air melting plastic recycling granulator. Background Art

[0002] The application scope of plastics is becoming increasingly wide, replacing metals, wood, paper, etc. with a large number of plastics. With the widespread use of plastics, a large amount of waste plastics has appeared. Because it is difficult to degrade, it becomes a problem to deal with, causing environmental pollution, and on the other hand, it is also a waste of resources. The recycling and resource development of waste plastics is a profound understanding of the environment and resources, and is a way of survival to reduce the environmental pollution caused by waste plastics and reduce the waste of resources.

[0003] Patent document CN112720908A disclosed a hot air melting plastic extrusion granulator and its use method on the announcement date of April 30, 2021. Its technical scheme includes: equipment body, the equipment body includes a hot air circulation system, a frame, a melting box, a melt gathering and pressurized conveying chamber, and a pelletizing device. The hot air circulation system includes a return air pipe, a fan, a heater, and an air inlet pipe. The melt gathering and pressurized conveying chamber is embedded in the frame. The melt box is provided with a stirring device and a feed port. The stirring device includes a drive motor, a gearbox, a stirring rod and a stirring blade. The output shaft of the drive motor is connected to the gearbox, and the stirring rod is connected to the gearbox. A stirring cross bar is provided at the bottom of the stirring rod, and a stirring blade is provided on the stirring cross bar. Its beneficial effect is that by setting an integrated process flow, during the recycling process, hot air is recycled, no waste gas, waste liquid, etc. are discharged, the process is clean, and the blade rotor can effectively increase the speed and pressure of the melt at the inlet of the screw barrel by gathering and conveying the melt, which is beneficial to the extrusion of the screw barrel and has high work efficiency.

[0004] As in the prior art of the above patent, the plastic waste is heated to a molten state through hot air circulation, but the hot air is used in a way that the air outlet is set to blow air downward only to achieve heating, so that only the top layer of plastic can be heated, which easily causes uneven heating of the plastic waste. Therefore, a hot air melting plastic recycling granulator is urgently needed to solve the above problem. Summary of the invention

[0005] The object of the present invention is to provide a hot air melting plastic recycling granulator to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A hot air molten plastic recycling granulator comprises a box body and a feed port arranged at the upper end of the box body, and also comprises: a heat transfer bin, which is rotatably arranged in the box body, and a ventilation gap is left between the outer wall of the heat transfer bin and the inner wall of the box body; a plurality of pneumatic blades are arranged on the circumference of the outer wall of the heat transfer bin; a circulation pipe, which is fixedly arranged on the outside of the box body, and a first air outlet and a second air outlet are respectively arranged at the upper and lower ends of the circulation pipe, the first air outlet is connected to the upper end of the box body, and the second air outlet is connected to the lower end of the box body and is arranged pointing to the pneumatic blades; a fan assembly, which is arranged in the middle of the circulation pipe and is used to drive the circulation pipe for ventilation.

[0008] Preferably, the fan assembly comprises a wind tube connected to the circulation pipe, a central body is fixedly arranged in the wind tube through a bracket, fans are arranged at both ends of the central body, and a heating wire is arranged in the wind tube.

[0009] Preferably, an elastically bendable rubber ring is provided at the upper end of the heat conduction chamber, and the rubber ring can block the ventilation gap setting.

[0010] Preferably, a discharge port penetrating the bottom of the box body is provided at the lower end of the heat transfer bin, and a gate assembly for controlling the opening and closing of the discharge port is provided at the bottom of the heat transfer bin.

[0011] Preferably, the gate assembly includes a sliding groove formed in a solid body at the bottom of the heat transfer chamber, a gate plate is slidably arranged in the sliding groove, and a driving unit for driving the gate plate to slide is arranged at the bottom of the heat transfer chamber.

[0012] Preferably, a support ring is provided on the inner bottom surface of the box body, a convex ring rotatably connected to the support ring is provided at the bottom of the heat transfer chamber, a plurality of through holes are provided on the circumference of the lower end of the support ring, a pressure valve assembly is provided on the side wall of the discharge port corresponding to the height of the support ring, the circulation pipe can switch the ventilation direction, and the pressure valve assembly opens when air is inhaled at the second air outlet.

[0013] Preferably, the pressure valve assembly comprises an air hole arranged on the side wall of the discharge port, and one end of the air hole facing the outside of the discharge port is connected to a valve plate via an elastic member.

[0014] Preferably, the inner wall of the discharge port is provided with a retaining ring covering the upper side of the air hole.

[0015] Preferably, an extrusion cylinder is arranged at the lower side of the box body, a pulley is arranged at the bottom of the extrusion cylinder, a supporting leg is arranged at the lower side of the box body, and a limiting component for limiting the position of the extrusion cylinder is arranged on the supporting leg.

[0016] Preferably, a bracket is provided on the support leg, a positioning edge is provided on the side wall of the extrusion cylinder, the limiting assembly includes a sinking groove provided on the bracket, a clamping rod is elastically hinged in the sinking groove, a clamping tooth is provided at the free end of the clamping rod, a clamping groove matching the clamping tooth is provided on the bottom surface of the positioning edge, and a pad is provided on the inner side of the sinking groove close to the free end of the clamping rod for sliding.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] The hot air melting plastic recycling granulator is provided with a heat transfer bin to fill the plastic waste, and a hot air flow is generated in the circulation pipe driven by the fan component, and air is extracted through the first air outlet and blown through the second air outlet. On the one hand, the second air outlet blows the hot air onto the surface of the heat transfer bin to heat the heat transfer bin and then heat the plastic waste, and on the other hand, it blows the pneumatic blades to make the heat transfer bin rotate so as to heat evenly. At the same time, the hot air flow flows from the bottom of the heat transfer bin through the ventilation gap to the top of the heat transfer bin, so that the inside of the box is heated as a whole, and is again drawn into the circulation pipe by the second air outlet to realize the hot air recycling. The entire plastic melting process has no waste gas, waste liquid, etc. discharged, which is clean and environmentally friendly.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of a front cross-sectional structure of a circulation pipe provided in an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the front cross-sectional structure of a discharge port provided in an embodiment of the present invention;

[0024] Figure 3 The embodiment of the present invention provides Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 4 A schematic diagram of a top-view cross-sectional structure provided by an embodiment of the present invention;

[0026] Figure 5A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0027] Figure 6 The embodiment of the present invention provides Figure 5 A schematic diagram of the enlarged structure at B in the middle;

[0028] Figure 7 A schematic diagram of the heat transfer chamber structure provided in an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1. Box body; 2. Feed inlet; 3. Heat transfer chamber; 4. Pneumatic blades; 5. Circulation pipe; 6. First air outlet; 7. Second air outlet; 8. Air tube; 9. Bracket; 10. Center body; 11. Fan; 12. Heating wire; 13. Rubber ring; 14. Discharge port; 15. Slide groove; 16. Gate; 17. Drive unit; 18. Support ring; 19. Convex ring; 20. Through hole; 21. Air hole; 22. Elastic part; 23. Valve plate; 24. Retaining ring; 25. Extrusion barrel; 26. Pulley; 27. Leg; 28. Bracket; 29. ​​Positioning edge; 30. Sinking groove; 31. Clamping rod; 32. Clamping tooth; 33. Clamping groove; 34. Pad. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0032] See also Figure 1-7 A hot air molten plastic recycling granulator provided by an embodiment of the present invention comprises a box body 1 and a feed port 2 arranged at the upper end of the box body 1, and also comprises: a heat conduction bin 3, which is rotatably arranged in the box body 1, and a ventilation gap is left between the outer wall thereof and the inner wall of the box body 1; a pneumatic blade 4, which is provided with a plurality of pneumatic blades on the circumference of the outer wall of the heat conduction bin 3; a circulation pipe 5, which is fixedly arranged on the outer side of the box body 1, and a first air port 6 and a second air port 7 are respectively arranged at the upper and lower ends thereof, the first air port 6 is connected to the upper end of the box body 1, and the second air port 7 is connected to the lower end of the box body 1, and is arranged pointing to the pneumatic blade 4; a fan assembly, which is arranged in the middle of the circulation pipe 5, and is used to drive the circulation pipe 5 for ventilation.

[0033] Specifically, the box body 1 is preferably cylindrical; the box body 1 can be set as a sandwich structure with a heat preservation effect; the feed port 2 is used to introduce the plastic waste to be processed into the box body 1; the upper end of the feed port 2 can be equipped with a lid; the heat transfer bin 3 is funnel-shaped and coaxially arranged with the box body 1; the heat transfer bin 3 is made of a heat-conducting metal material and is resistant to high temperatures; the maximum outer diameter of the heat transfer bin 3 is smaller than the inner diameter of the box body 1, thereby generating a ventilation gap; the pneumatic blades 4 are set at a height close to the bottom of the heat transfer bin 3, and the pneumatic blades 4 are also made of a heat-conducting material, which can transfer heat to and from the heat transfer bin 3 The pneumatic blades 4 are arranged to extend along the radial direction of the heat transfer chamber 3; the circulation pipe 5 is used to guide and connect the airflow at the top and bottom of the box body 1 from the outside of the box body 1, so that airflow is generated inside the box body 1 and a circulation is formed; the first air outlet 6 opens downward, facing the inside of the heat transfer chamber 3; the second air outlet 7 is set with a smaller opening, and is horizontally facing the tangential direction of the outer wall of the heat transfer chamber 3 and pointing to the trajectory of the pneumatic blades 4 rotating with the heat transfer chamber 3; the fan assembly actively drives the circulation pipe 5 to generate airflow in a fixed direction, and the fan assembly is integrated with an airflow heating function. In actual use of this technical solution, plastic waste enters the box body 1 through the feed inlet 2 and is loaded into the heat transfer bin 3. The fan assembly is started to generate a hot air flow in the circulation pipe 5, and air is extracted through the first air outlet 6 and blown through the second air outlet 7. On the one hand, the second air outlet 7 blows hot air on the surface of the heat transfer bin 3 to heat the heat transfer bin 3 and then heat the plastic waste. On the other hand, it blows the pneumatic blades 4 to rotate the heat transfer bin 3 so that it is heated evenly. At the same time, the hot air flow flows from the bottom of the heat transfer bin 3 through the ventilation gap to the top of the heat transfer bin 3, so that the interior of the box body 1 is heated as a whole, and is again drawn into the circulation pipe 5 by the second air outlet 7 to realize the hot air recycling.

[0034] Compared with the prior art, a hot air melting plastic recycling granulator proposed in an embodiment of the present invention is provided with a heat transfer bin 3 to fill plastic waste, and a hot air flow is generated in the circulation pipe 5 driven by a fan assembly, and air is extracted through the first air port 6 and blown through the second air port 7. On the one hand, the second air port 7 blows hot air on the surface of the heat transfer bin 3 to heat the heat transfer bin 3 and then heat the plastic waste, and on the other hand, it blows the pneumatic blades 4 to rotate the heat transfer bin 3 to be heated evenly. At the same time, the hot air flow flows from the bottom of the heat transfer bin 3 through the ventilation gap to the top of the heat transfer bin 3, so that the interior of the box body 1 is heated as a whole, and is again drawn into the circulation pipe 5 by the second air port 7 to realize the hot air recycling. The entire plastic melting process has no waste gas, waste liquid, etc. discharged, which is clean and environmentally friendly.

[0035] As the preferred technical solution of this embodiment, the fan assembly includes an air duct 8 connected to the circulation pipe 5, a central body 10 is fixedly arranged in the air duct 8 by a bracket 9, fans 11 are arranged at both ends of the central body 10, and a heating wire 12 is arranged in the air duct 8. Specifically, the air duct 8 is arranged along the extension direction of the circulation pipe 5; a servo motor for driving the fan 11 to rotate is integrated inside the central body 10, and the servo motor can drive the fan 11 to switch to opposite rotation directions under the control of the servo system. The fans 11 at both ends are arranged to rotate synchronously in the same direction, and the wind directions generated by the two fans 11 are consistent; the blades of the fan 11 are arranged symmetrically to meet the airflow in opposite directions; a plurality of heating wires 12 are arranged, which can be arranged on the inner wall of the air duct 8 and the outer wall of the central body 10, and the airflow generated in the air duct 8 by the fan 11 can be heated by the heating wire 12 and then flow into the circulation pipe 5.

[0036] As a preferred technical solution of this embodiment, an elastically bendable rubber ring 13 is provided at the upper end of the heat transfer bin 3, and the rubber ring 13 can block the ventilation gap setting. Specifically, the rubber ring 13 is connected to the upper end of the heat transfer bin 3 in a circle and can be elastically bent. The rubber ring 13 itself has tensile elasticity; when the rubber ring 13 is in a free state, the outer diameter of the upper end matches the inner diameter of the box body 1, so that the upper end of the rubber ring 13 automatically keeps close to the inner wall of the box body 1 to block the ventilation gap. At this time, when air circulation is not performed in the box body 1, the rubber ring 13 blocks the upper end of the ventilation gap, which can prevent some small-sized plastic waste from falling into or getting stuck in the ventilation gap when plastic waste is added to the box body 1 through the feed port 2; and when the second air outlet 7 blows air to the bottom of the heat transfer bin 3, the air flow can pass through the ventilation gap to squeeze the rubber ring 13 upwards, ensuring that the hot air flow flows to the top of the heat transfer bin 3 for subsequent circulation.

[0037] In addition, the rubber ring 13 blocks the ventilation gap when the first air outlet 6 is used for blowing and the second air outlet 7 is used for exhausting, so that negative pressure is formed in the bottom space of the heat transfer chamber 3, thereby making the rubber ring 13 further tightly block the ventilation gap.

[0038] In another embodiment proposed by the present invention, a discharge port 14 penetrating the bottom of the box body 1 is provided at the lower end of the heat conduction bin 3, and a gate assembly for controlling the switch of the discharge port 14 is provided at the bottom of the heat conduction bin 3. Specifically, the discharge port 14 is provided at the lowest end of the heat conduction bin 3, and forms a complete funnel structure with the heat conduction bin 3; the discharge port 14 is in a cylindrical tube shape, coaxially arranged with the heat conduction bin 3, and rotates to penetrate the bottom of the box body 1; the gate assembly controls the switch from the uppermost position of the discharge port 14, which can prevent the plastic waste from being retained in the discharge port 14 and unable to be fully heated.

[0039] As a preferred technical solution of this embodiment, the gate assembly includes a sliding groove 15 opened in the bottom entity of the heat transfer bin 3, a gate plate 16 is slidably arranged in the sliding groove 15, and a driving unit 17 for driving the gate plate 16 to slide is arranged at the bottom of the heat transfer bin 3. Specifically, the sliding groove 15 covers the upper end of the discharge port 14, and the part of the sliding groove 15 covering the discharge port 14 is through from top to bottom, and the other part of the sliding groove 15 extends in the horizontal direction, and the upper and lower sides are the heat transfer bin 3 entity; the gate plate 16 slides in the sliding groove 15 to cover or avoid the upper end of the discharge port 14, thereby controlling the switch of the discharge port 14; The driving unit 17 may preferably be a hydraulic telescopic rod, the output end of which is hinged to the gate 16 through an axis rod sliding through the bottom of the heat transfer bin 3, and the tail end of the hydraulic telescopic rod is hinged to the bottom of the heat transfer bin 3, and the angle between the telescopic direction of the output end of the hydraulic telescopic rod and the sliding direction of the gate 16 is set as an acute angle; in actual use, the output end of the hydraulic telescopic rod is extended, that is, the gate 16 is driven away from the top of the discharge port 14 to open the discharge port 14, and the output end of the hydraulic telescopic rod is shortened, that is, the gate 16 is driven close to the top of the discharge port 14 to close the discharge port 14; the driving unit 17 is controlled by a servo system.

[0040] In another embodiment of the present invention, a support ring 18 is provided on the bottom surface of the box body 1, a convex ring 19 rotatably connected to the support ring 18 is provided at the bottom of the heat transfer chamber 3, a plurality of through holes 20 are provided on the circumference of the lower end of the support ring 18, a pressure valve assembly is provided on the side wall of the discharge port 14 corresponding to the height of the support ring 18, the circulation pipe 5 can switch the ventilation direction, and when the second air port 7 inhales air, the pressure valve assembly is opened. Specifically, the support ring 18 is coaxial with the box body 1, and a coaxial annular groove is provided on the top of the support ring 18. The convex ring 19 is embedded in the annular groove and can slide in an annular shape so that the heat transfer chamber 3 can rotate coaxially relative to the box body 1; the through hole 20 is provided so that the support ring 18 can rotate coaxially with the box body 1. The internal space is connected with the external space; the pressure valve assembly is unidirectional and can only guide the airflow from the discharge port 14 to the space between the discharge port 14 and the support ring 18; the circulation pipe 5 can switch the ventilation direction under the drive of the fan assembly, specifically: when the first air port 6 draws air, the second air port 7 discharges air. At this time, the main heating function is that the first air port 6 heats the bottom of the heat transfer bin 3, and the heat transfer bin 3 heats the internal plastic waste; and when the first air port 6 discharges air, the second air port 7 draws air. At this time, the main heating function is that the second air port 7 heats the plastic waste on the upper surface of the heat transfer bin 3; the above two heating modes further ensure that the plastic waste is fully heated and melted. In actual use, when the second air vent 7 inhales air, since the ventilation gap is blocked by the rubber ring 13, negative pressure is generated in the space below the heat transfer bin 3 in the box body 1, and the pressure valve assembly is triggered to open under the action of this negative pressure, and then the air can be replenished to the space below the heat transfer bin 3 through the discharge port 14; in addition, after the discharge port 14 is connected with the space below the heat transfer bin 3, a high-speed airflow is generated in the discharge port 14, so that the discharge port 14 generates a negative pressure relative to the inside of the heat transfer bin 3. At this time, after the discharge port 14 is opened, the molten plastic in the heat transfer bin 3 can be accelerated to discharge, thereby improving production efficiency.

[0041] As a preferred technical solution of this embodiment, the pressure valve assembly includes an air hole 21 arranged on the side wall of the discharge port 14, and the end of the air hole 21 facing the outside of the discharge port 14 is connected to a valve plate 23 through an elastic member 22. Specifically, a plurality of air holes 21 can be arranged, which are evenly distributed on the circumference of the side wall of the discharge port 14; the inner wall of the discharge port 14 is a hole-shaped with an inner diameter increasing in a step-like manner along the axial direction outward; the elastic member 22 is preferably a spring, one end of which is connected to the inner side of the air hole 21, and the other end is connected to the valve plate 23, and the valve plate 23 can completely block the end of the air hole 21 facing the outside of the discharge port 14; when the elastic member 22 is in a free state, it pulls the valve plate 23 to fit tightly against the outer end of the air hole 21 to keep the air hole 21 closed, and when the second air port 7 is evacuated to generate negative pressure in the space between the discharge port 14 and the support ring 18, the valve plate 23 is squeezed toward the outer end of the air hole 21, so that the discharge port 14 is connected to the space below the heat transfer bin 3.

[0042] As a preferred technical solution of this embodiment, a retaining ring 24 is provided on the inner wall of the discharge port 14 to block the upper side of the pore 21 . Specifically, the retaining ring 24 can prevent the molten plastic discharged through the discharge port 14 from entering the pore 21 .

[0043] In another embodiment of the present invention, an extrusion barrel 25 is provided on the lower side of the box body 1, a pulley 26 is provided on the bottom of the extrusion barrel 25, and a support leg 27 is provided on the lower side of the box body 1. A limiting component for limiting the position of the extrusion barrel 25 is provided on the support leg 27. Specifically, a collecting bucket connected to the discharge port 14 is provided on the upper end of the extrusion barrel 25, a spiral extrusion conveying structure is provided inside the extrusion barrel 25, and a die is provided at the end of the spiral extrusion conveying structure, which can extrude the molten plastic into strips and then pelletize it. The above parts are all prior arts and will not be repeated here. A plurality of pulleys 26 are symmetrically provided to support the extrusion barrel 25 and facilitate the movement of the extrusion barrel 25. The support leg 27 supports the box body 1 at a suitable height and can facilitate docking of the extrusion barrel 25. The limiting component is used to limit the position of the extrusion barrel 25 relative to the box body 1 to ensure that when the plastic is melted and discharged, the extrusion barrel 25 is fixed in a position for smooth and stable reception.

[0044] As a preferred technical solution of this embodiment, a bracket 28 is provided on the support leg 27, a positioning edge 29 is provided on the side wall of the extrusion barrel 25, and the limiting component includes a sinking groove 30 provided on the bracket 28, a clamping rod 31 is elastically hinged in the sinking groove 30, a clamping tooth 32 is provided at the free end of the clamping rod 31, a clamping groove 33 matching the clamping tooth 32 is provided on the bottom surface of the positioning edge 29, and a pad 34 is slidably provided on the inner side of the sinking groove 30 near the free end of the clamping rod 31. Specifically, the bracket 28 is horizontally arranged, and two are symmetrically arranged at the bottom of the box body 1, and the spacing between the two brackets 28 matches the width of the extrusion barrel 25; the positioning edge 29 is horizontally arranged, and the height just corresponds to the top of the bracket 28; the upper end of the bracket 28 is provided with a protrusion, which can limit When the designated end of the positioning edge 29 abuts against the protrusion, the position of the extruder 25 is accurate; one end of the rotating shaft of the clamping rod 31 is connected to the sinking groove 30 through a torsion spring. Under the action of the torsion spring, the clamping rod 31 keeps the free end horizontal and flush with the upper surface of the bracket 28. At this time, the latch tooth 32 protrudes on the upper side of the free end of the clamping rod 31; the latch tooth 32 is arranged in a triangular tooth shape; there is a gap between the free end of the clamping rod 31 and the inner bottom surface of the sinking groove 30, that is, the free end of the clamping rod 31 can be rotated and lowered to allow the latch tooth 32 to be received in the sinking groove 30; the sliding height of the cushion block 34 is consistent with the bottom height of the free end of the clamping rod 31 when it is not under force and is stationary, and the side wall of the cushion block 34 is provided with a lever that slides through the bracket 28 to facilitate the movement of the cushion block 34. In actual use of the present technical solution, when it is necessary to dock the extruder 25 under the box body 1, the extruder 25 moves to the bottom of the box body 1 with one end where the collecting bucket is set, and moves between the two brackets 28. At the same time, the positioning edge 29 is on the upper side of the bracket 28. When the positioning edge 29 passes through the raised latch teeth 32, the latch teeth 32 can be directly pressed downward, so that the latch rod 31 elastically rotates downward to avoid it. When the collecting bucket of the extruder 25 is exactly corresponding to the discharge port 14, the latch groove 33 on the positioning edge 29 also corresponds to the latch teeth 32 up and down. Therefore, the latch rod 31 elastically rotates upward to restore the height of the free end, and also drives the latch teeth 32 to be embedded in the latch groove 33, so that the positioning The edge 29 is initially positioned relative to the bracket 28, that is, the extrusion barrel 25 is initially positioned relative to the box body 1; further, the movable pad 34 blocks the lower side of the free end of the clamping rod 31 at this time, thereby limiting the free end of the clamping rod 31 from rotating downward, that is, the latch tooth 32 is fixedly embedded in the clamping groove 33, thereby completing the fixation of the positioning edge 29 relative to the bracket 28, that is, the fixation of the extrusion barrel 25 relative to the box body 1; and when the extrusion barrel 25 needs to be separated, the pad 34 is first moved away from the lower side of the free end of the clamping rod 31, and then the extrusion barrel 25 is pulled forcefully to move, and the clamping groove 33 can squeeze the latch tooth 32 to disengage, and then the extrusion barrel 25 can be moved out from the bottom of the box body 1.

[0045] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hot air molten plastic recycling granulator, comprising a box (1) and a feed inlet (2) arranged at the upper end of the box (1), characterized in that: Also includes: A heat transfer chamber (3) is rotatably disposed in the box body (1), and a ventilation gap is provided between the outer wall of the heat transfer chamber and the inner wall of the box body (1); A plurality of wind blades (4) are arranged on the circumference of the outer wall of the heat transfer chamber (3); A circulation pipe (5) is fixedly arranged outside the box body (1), and is provided with a first air outlet (6) and a second air outlet (7) at its upper and lower ends respectively; the first air outlet (6) is connected to the upper end inside the box body (1), and the second air outlet (7) is connected to the lower end inside the box body (1), and is arranged to point to the wind blades (4); A fan assembly is arranged in the middle of the circulation pipe (5) and is used to drive the circulation pipe (5) for ventilation.

2. The hot air melting plastic recycling granulator according to claim 1 is characterized in that: The fan assembly comprises a wind tube (8) connected to a circulation pipe (5), a central body (10) is fixedly arranged in the wind tube (8) via a bracket (9), fans (11) are arranged at both ends of the central body (10), and a heating wire (12) is arranged in the wind tube (8).

3. The hot air melting plastic recycling granulator according to claim 1, characterized in that: An elastically bendable rubber ring (13) is provided at the upper end of the heat conduction chamber (3), and the rubber ring (13) can block the ventilation gap.

4. The hot air melting plastic recycling granulator according to claim 1, characterized in that: The lower end of the heat-conducting bin (3) is provided with a discharge port (14) penetrating the bottom of the box body (1), and the bottom of the heat-conducting bin (3) is provided with a gate assembly for controlling the opening and closing of the discharge port (14).

5. The hot air melting plastic recycling granulator according to claim 4 is characterized in that: The gate assembly comprises a sliding groove (15) formed in a solid body at the bottom of the heat-conducting chamber (3), a gate plate (16) being slidably arranged in the sliding groove (15), and a driving unit (17) for driving the gate plate (16) to slide is arranged at the bottom of the heat-conducting chamber (3).

6. The hot air melting plastic recycling granulator according to claim 4, characterized in that: The inner bottom surface of the box body (1) is provided with a support ring (18), the bottom of the heat transfer chamber (3) is provided with a convex ring (19) rotatably connected to the support ring (18), the lower end circumference of the support ring (18) is provided with a plurality of through holes (20), the side wall of the discharge port (14) corresponding to the height of the support ring (18) is provided with a pressure valve assembly, the circulation pipe (5) can switch the ventilation direction, and when the second air port (7) inhales air, the pressure valve assembly is opened.

7. The hot air melting plastic recycling granulator according to claim 6, characterized in that: The pressure valve assembly comprises an air hole (21) arranged on the side wall of the discharge port (14); one end of the air hole (21) facing the outside of the discharge port (14) is connected to a valve plate (23) via an elastic member (22).

8. The hot air melting plastic recycling granulator according to claim 7, characterized in that: The inner wall of the discharge port (14) is provided with a blocking ring (24) which blocks the upper side of the air hole (21).

9. The hot air melting plastic recycling granulator according to claim 1, characterized in that: An extrusion cylinder (25) is arranged at the lower side of the box body (1), a pulley (26) is arranged at the bottom of the extrusion cylinder (25), a support leg (27) is arranged at the lower side of the box body (1), and a limiting component for limiting the position of the extrusion cylinder (25) is arranged on the support leg (27).

10. The hot air melting plastic recycling granulator according to claim 9, characterized in that: A bracket (28) is arranged on the support leg (27), a positioning edge (29) is arranged on the side wall of the extrusion cylinder (25), the limiting assembly comprises a sinking groove (30) arranged on the bracket (28), a clamping rod (31) is elastically hinged in the sinking groove (30), a clamping tooth (32) is arranged at the free end of the clamping rod (31), a clamping groove (33) matching the clamping tooth (32) is arranged on the bottom surface of the positioning edge (29), and a cushion block (34) is slidably arranged on the inner side of the sinking groove (30) close to the free end of the clamping rod (31).

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