Twin-screw extrusion granulation equipment

Abstract

The utility model relates to the technical field of extrusion equipment, and particularly discloses double-screw extrusion granulation equipment which comprises a first machine table and a second machine table, a plastic extruding machine is arranged at the upper end of the first machine table, a material injection barrel is arranged at the input end of the plastic extruding machine, a water tank is arranged at the output end of the plastic extruding machine, and a heat exchanger is arranged on the inner side of the second machine table. Pipe joints are arranged on the left side and the right side of the water tank, the pipe joints are communicated with a cooling pipe arranged on the inner side of the water tank, a plurality of flow guide plates are arranged on the inner side of the water tank, the flow guide plates are fixedly arranged on the corners of the inner side of the water tank respectively, and impeller structures used for pushing water flow are arranged on the flow guide plates. The impeller structure pushes water flow from the edge of the water tank box to enable the water flow to flow in one direction, the flow guide plate guides the water flow to enable cooling water in the water tank box to form vortexes, the vortex motion enables the contact area of the cooling water and the cooling pipe to be increased, the water flow speed is increased, heat on the surface of the cooling pipe can be taken away more rapidly, and the cooling efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of extrusion equipment technology, and in particular to a twin-screw extrusion granulation equipment. Background Technology

[0002] Twin-screw extruders, through the collaborative efforts of core components such as two precisely meshing screws, a barrel, an intelligent heating and cooling system, a vacuum system, a stable transmission system, and a sophisticated electrical control system, ensure the efficient transformation of plastic raw materials into granular products. The intelligent heating and cooling system is crucial for the shaping of extruded products.

[0003] Patent application CN202220286251.0 discloses a cooling water tank for a plastic extrusion granulator with circulating cooling function. The tank includes a support frame and a water tank body mounted on the support frame, as well as a cooling mechanism. The cooling mechanism includes an air cooler, a water pump assembly, a first water distributor, a second water distributor, and a first heat dissipation pipe located below the water tank body. The air cooler includes a cylindrical body closed at both ends and an air cooling assembly. A liquid storage chamber is provided inside the cylindrical body. An inlet and an outlet connected to the liquid storage chamber are respectively provided on the outer walls of both ends of the cylindrical body. The liquid storage chamber is filled with coolant. A through hole is formed in the axial direction of the cylindrical body. The air cooling assembly includes a fixed shaft fixed radially within the through hole, a rotating sleeve sleeved on the fixed shaft, and a rotating plate on the outer wall of the rotating sleeve. The rotating sleeve is rotatable relative to the fixed shaft. This invention enables circulating cooling with good cooling effect. After extrusion, the product enters a water tank and is cooled by the cooling water in the tank. However, since the water in the tank is mostly static, local overheating occurs during the cooling process, and the heat is difficult to transfer evenly, affecting the cooling efficiency and shaping effect. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a twin-screw extrusion granulation device to overcome the shortcomings of existing equipment.

[0005] To achieve the purpose of this utility model, the utility model is achieved through the following technical solution: a twin-screw extrusion granulation equipment, including a first machine platform and a second machine platform, an extruder is provided at the upper end of the first machine platform, an injection cylinder is provided at the input end of the extruder, a water tank is provided at the output end of the extruder, and the water tank is fixedly installed at the upper end of the second machine platform;

[0006] The second machine is equipped with a heat exchanger inside. The heat exchanger is located below the water tank and is connected to the water tank through a guide pipe. Pipe joints are provided on the left and right sides of the water tank. The pipe joints are connected to the cooling pipes located inside the water tank. The cooling pipes are fixedly installed inside the water tank.

[0007] The inside of the water tank is equipped with multiple guide plates, each of which is fixedly installed on a corner of the inside of the water tank. The guide plates are equipped with impeller structures for driving the water flow.

[0008] A further improvement is that the guiding pipe includes a first guiding pipe and a second guiding pipe. One end of the first guiding pipe is connected to the input end of the heat exchanger, and the other end of the first guiding pipe is connected to the water inlet of the water tank. One end of the second guiding pipe is connected to the output end of the heat exchanger, and the other end of the second guiding pipe is connected to the drain outlet of the water tank. A circulating water pump is installed at the connection between the second guiding pipe and the heat exchanger.

[0009] A further improvement is that the water inlet is located at the top of the water tank, and the drain outlet is located at the bottom of the water tank.

[0010] A further improvement is that the impeller structure includes a mounting frame and an impeller, the mounting frame is detachably connected to the guide plate, the impeller is rotatably mounted inside the mounting frame, and a power component for controlling the rotation of the impeller is provided on the top of the water tank.

[0011] A further improvement is that the top and bottom of the mounting bracket are provided with multiple lugs, the lugs are fixedly connected to the mounting bracket, and a fixing bolt is fitted on the lug. The fixing bolt passes through the lug and is threadedly connected to the bolt hole opened on the guide plate.

[0012] A further improvement is made in that the power component includes a motor and a drive shaft. The motor is fixedly mounted on the upper end of the water tank, and the drive shaft is rotatably mounted on the upper end of the mounting bracket. The output end of the motor is fixedly connected to the drive shaft, and the lower end of the drive shaft is fixedly connected to the impeller. The rotation of the impeller is controlled by an independent motor.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The impeller structure pushes the water flow from the edge of the water tank, causing the water to flow in one direction. The guide plate guides the water flow, causing the cooling water in the water tank to form a vortex. The vortex motion increases the contact area between the cooling water and the cooling pipes, and the water flow speed increases, which can more quickly remove the heat from the surface of the cooling pipes and improve the cooling efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural diagram of the extruder in this utility model.

[0017] Figure 2 This is a structural diagram of the water tank in this utility model.

[0018] Figure 3 This is a structural diagram of the guide plate in this utility model.

[0019] Figure 4 This is a structural diagram of the impeller in this utility model.

[0020] The components are: 1. First machine base; 2. Extruder; 3. Injection cylinder; 4. Second machine base; 5. Water tank; 6. Heat exchanger; 7. First guide pipe; 8. Second guide pipe; 9. Circulating water pump; 10. Motor; 11. Pipe joint; 12. Cooling pipe; 13. Guide plate; 14. Mounting bracket; 15. Impeller; 16. Drive shaft; 17. Bolt lug; 18. Fixing bolt. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] according to Figure 1 , 2 As shown in Figures 3 and 4, this embodiment proposes a twin-screw extrusion granulation equipment, including a first machine base 1 and a second machine base 4. The upper end of the first machine base 1 is provided with an extruder 2, the input end of the extruder 2 is provided with a feeding cylinder 3, the output end of the extruder 2 is provided with a water tank 5, and the water tank 5 is fixedly installed on the upper end of the second machine base 4.

[0023] The second machine 4 is equipped with a heat exchanger 6 inside. The heat exchanger 6 is placed below the water tank 5 and is connected to the water tank 5 through a guide pipe. The left and right sides of the water tank 5 are equipped with pipe joints 11. The pipe joints 11 are connected to the cooling pipes 12 located inside the water tank 5. The cooling pipes 12 are fixedly installed inside the water tank 5.

[0024] After entering the extruder 2 through the injection cylinder 3, the material is kneaded by the two rotating screws inside the extruder 2, forming a clump that rolls forward along the screw grooves. Under the shearing, compression, and stirring action of the screws, the material is fully mixed and plasticized, and the temperature and pressure gradually increase until it reaches a viscous flow state. Finally, the material is extruded through the die head at a specific pressure and temperature to form a product of the desired shape. After passing through the die head, the product enters the cooling pipes 12 in the water tank 5 for cooling.

[0025] Multiple guide plates 13 are provided inside the water tank 5. Each guide plate 13 is fixedly installed on each corner of the inside of the water tank 5. The guide plate 13 is provided with an impeller structure for driving the water flow.

[0026] The impeller structure is arranged on each guide plate 13, which is located at each corner inside the water tank 5. The impeller structure pushes the water flow from the edge of the water tank 5, causing the water flow to flow in one direction. The guide plates 13 guide the water flow, causing the cooling water in the water tank 5 to form a vortex. The vortex motion increases the contact area between the cooling water and the cooling pipe 12 and increases the water flow speed, which can more quickly remove the heat from the surface of the cooling pipe 12. Compared with static or unidirectional water flow, the vortex can accelerate the heat transfer efficiency, uniformly cool and avoid local overheating, and improve the cooling efficiency.

[0027] The flow guiding pipe includes a first flow guiding pipe 7 and a second flow guiding pipe 8. One end of the first flow guiding pipe 7 is connected to the input end of the heat exchanger 6, and the other end of the first flow guiding pipe 7 is connected to the water inlet of the water tank 5. One end of the second flow guiding pipe 8 is connected to the output end of the heat exchanger 6, and the other end of the second flow guiding pipe 8 is connected to the drain outlet of the water tank 5. A circulating water pump 9 is installed at the connection between the second flow guiding pipe 8 and the heat exchanger 6.

[0028] It is worth explaining in detail that the water inlet is located at the top of the water tank 5, and the drain outlet is located at the bottom of the water tank 5. The circulating water pump 9 draws cooling water from the water tank 5 through the second guide pipe 8 and sends it to the heat exchanger 6 for cooling. The heat exchanger 6 pushes the cooled water back into the water tank 5 through the first guide pipe 7, thereby realizing the circulation of cooling water. As a commonly used device in water-cooled circulation systems, the heat exchanger 6 will not be described in detail.

[0029] Specifically, the impeller structure includes a mounting frame 14 and an impeller 15. The mounting frame 14 is detachably connected to the guide plate 13. The impeller 15 is rotatably mounted inside the mounting frame 14. The top of the water tank 5 is provided with a power component for controlling the rotation of the impeller 15.

[0030] The power unit controls the impeller 15 to rotate. As the impeller 15 rotates, it agitates the water flow in the water tank 5, pushing the cooling water in the water tank 5 toward the adjacent guide plate 13. The guide plate 13 guides the water flow, causing the cooling water in the water tank 5 to form a vortex.

[0031] The mounting bracket 14 is detachably installed inside the water tank 5. Multiple lugs 17 are provided at the top and bottom of the mounting bracket 14, and these lugs 17 are fixedly connected to the mounting bracket 14. A fixing bolt 18 is fitted onto each lug 17, passing through the lug 17 and threadedly connected to a bolt hole on the guide plate 13. When removing the mounting bracket 14 from the guide plate 13, rotating the fixing bolt 18 releases the lugs 17 from the guide plate 13, allowing the mounting bracket 14, along with the impeller structure, to be completely removed from the water tank 5 for easy maintenance and replacement by staff.

[0032] Specifically, the power components include a motor 10 and a drive shaft 16. The motor 10 is fixedly mounted on the upper end of the water tank 5, and the drive shaft 16 is rotatably mounted on the upper end of the mounting bracket 14. The output end of the motor 10 is fixedly connected to the drive shaft 16, and the lower end of the drive shaft 16 is fixedly connected to the impeller 15. The rotation of the impeller 15 is controlled by an independent motor 10.

[0033] How this application works:

[0034] After entering the extruder 2 through the injection cylinder 3, the material is kneaded by the two rotating screws inside the extruder 2, forming a clump that rolls forward along the screw grooves. Under the shearing, compression, and stirring action of the screws, the material is fully mixed and plasticized, and the temperature and pressure gradually increase until it reaches a viscous flow state. Finally, the material is extruded through the die head at a specific pressure and temperature to form a product of the desired shape. After passing through the die head, the product enters the cooling pipes 12 in the water tank 5 for cooling. The impeller structure is arranged on each guide plate 13, which is located at each corner of the inner side of the water tank 5. The impeller structure pushes the water flow from the edge of the water tank 5, causing the water to flow in one direction. The guide plates 13 guide the water flow, causing the cooling water in the water tank 5 to form a vortex motion, which more quickly removes the heat from the surface of the cooling pipes 12.

[0035] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0036] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A twin-screw extrusion granulation apparatus, comprising a first machine base (1) and a second machine base (4), wherein an extruder (2) is provided at the upper end of the first machine base (1), and an injection cylinder (3) is provided at the input end of the extruder (2), characterized in that: The extruder (2) is equipped with a water tank (5) at its output end, and the water tank (5) is fixedly installed on the upper end of the second machine base (4); The second machine (4) is provided with a heat exchanger (6) inside. The heat exchanger (6) is placed below the water tank (5) and connected to the water tank (5) through a guide pipe. The water tank (5) is provided with pipe joints (11) on the left and right sides. The pipe joints (11) are connected to the cooling pipes (12) provided inside the water tank (5). The cooling pipes (12) are fixedly installed inside the water tank (5). The water tank (5) is provided with multiple guide plates (13) on its inner side. Each guide plate (13) is fixedly installed on each corner of the inner side of the water tank (5). The guide plate (13) is provided with an impeller structure for driving the water flow.

2. The twin-screw extrusion granulation equipment according to claim 1, characterized in that: The flow guiding pipe includes a first flow guiding pipe (7) and a second flow guiding pipe (8). One end of the first flow guiding pipe (7) is connected to the input end of the heat exchanger (6), and the other end of the first flow guiding pipe (7) is connected to the water inlet of the water tank (5). One end of the second flow guiding pipe (8) is connected to the output end of the heat exchanger (6), and the other end of the second flow guiding pipe (8) is connected to the drain outlet of the water tank (5). A circulating water pump (9) is provided at the connection between the second flow guiding pipe (8) and the heat exchanger (6).

3. The twin-screw extrusion granulation equipment according to claim 2, characterized in that: The water inlet is located at the top of the water tank (5), and the drain outlet is located at the bottom of the water tank (5).

4. The twin-screw extrusion granulation equipment according to claim 1, characterized in that: The impeller structure includes a mounting frame (14) and an impeller (15). The mounting frame (14) is detachably connected to the guide plate (13). The impeller (15) is rotatably disposed inside the mounting frame (14). The top of the water tank (5) is provided with a power component for controlling the rotation of the impeller (15).

5. A twin-screw extrusion granulation apparatus according to claim 4, characterized in that: The mounting bracket (14) has multiple lugs (17) at its top and bottom. The lugs (17) are fixedly connected to the mounting bracket (14). A fixing bolt (18) is mounted on the lug (17). The fixing bolt (18) passes through the lug (17) and is threadedly connected to the bolt hole opened on the guide plate (13).

6. The twin-screw extrusion granulation equipment according to claim 4, characterized in that: The power components include a motor (10) and a drive shaft (16). The motor (10) is fixedly mounted on the upper end of the water tank (5), and the drive shaft (16) is rotatably mounted on the upper end of the mounting bracket (14). The output end of the motor (10) is fixedly connected to the drive shaft (16), and the lower end of the drive shaft (16) is fixedly connected to the impeller (15).

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