Double-screw extrusion granulator

Abstract

The utility model relates to the technical field of extrusion pelletizers, in particular to a double-screw extrusion pelletizer which comprises a machine barrel and a flow guide plate, a bottom plate is arranged below the machine barrel, supporting legs are arranged on the bottom plate, a mounting table is arranged on the supporting legs, and a first conveying machine and a second conveying machine are arranged on the mounting table. Outer side heat dissipation grooves and inner side heat dissipation grooves are formed in shells of the first material conveying machine and the second material conveying machine, heat conduction layers and middle heat conduction pieces are arranged in the inner side heat dissipation grooves, heat dissipation holes are formed in the middle heat conduction pieces, heat dissipation frames are arranged on the shells of the first material conveying machine and the second material conveying machine, and heat dissipation covers and heat dissipation holes are arranged on the heat dissipation frames. A flow guide hole is formed in the mounting table, a heat extraction fan is arranged in the heat extraction cover, a smooth layer is arranged on the flow guide plate, and supporting columns are arranged on the supporting legs. The situation that the service life is shortened due to the fact that working heat between the first material conveying machine and the second material conveying machine cannot be dissipated in time is avoided, the phenomenon that the flow guide plate shakes is avoided, and the flow guide and heat dissipation effects are guaranteed.

Description

Technical Field

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

[0002] Twin-screw extruders have two feeding screws that mesh with each other. Compared to single-screw extruders, twin-screw extruders have higher material conveying efficiency and shorter material residence time in the barrel, enabling them to complete the extrusion and granulation process more quickly.

[0003] A twin-screw extruder granulator generally consists of a feeding hopper, a barrel, a twin-screw conveying assembly, and an extrusion head. The twin-screw conveying assembly consists of a first conveyor and a second conveyor. The first conveying screw is mounted on the first motor shaft of the first conveyor, and the second conveying screw is mounted on the second motor shaft of the second conveyor. The rotation and interaction of the two conveying screws convey and mix the materials.

[0004] Currently, existing twin-screw extruders generate a lot of heat when powered on. Due to the small distance between the first and second feeders, the heat cannot be dissipated in time. Over time, the accumulated heat will affect the service life of both feeders. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a twin-screw extruder granulator.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a twin-screw extruder granulator, including a barrel and a guide plate. A base plate is provided below the barrel, and a support leg is provided on the base plate. A mounting platform is provided on the support leg, and a first feeder and a second feeder are provided on the mounting platform. The outer shells of the first and second feeders are provided with outer heat dissipation grooves and inner heat dissipation grooves. A heat-conducting layer and a central heat-conducting plate are provided in the inner heat dissipation groove. Heat dissipation holes are provided on the central heat-conducting plate. A heat dissipation frame is provided on the outer shells of the first and second feeders. The heat dissipation frame is provided with a heat exhaust cover and heat exhaust holes. A top dustproof net and a bottom dustproof net are provided inside the heat exhaust cover.

[0008] The mounting platform is provided with a flow guide hole, and the heat exhaust cover is provided with a heat extraction fan.

[0009] The heat sink is equipped with screws, the air guide plate is equipped with a smoothing layer, and the support leg is equipped with a support column.

[0010] Furthermore, the heat dissipation hole is vertically penetrating the central heat-conducting plate and vertically aligned with the flow guide hole, and the flow guide hole has a downward diffused inner hole structure.

[0011] Furthermore, the inner heat dissipation groove is a rectangular opening groove with five vertically arranged grooves, and the heat-conducting layer is evenly distributed along the inner wall of the inner heat dissipation groove.

[0012] Furthermore, the guide plate is an arc-shaped structure, and the support column is located between the guide plate and the support leg.

[0013] Furthermore, the central heat-conducting plate is a rectangular plate structure, and both ends of the central heat-conducting plate are in close contact with the inner heat dissipation groove. The interior of the heat dissipation cover is a hollow cavity and is connected to the heat dissipation hole. The top dustproof net and the bottom dustproof net are respectively located at the top and bottom of the heat extraction fan.

[0014] Furthermore, the heat sink has a trapezoidal shape and is a through-type structure, and the screws are arranged in two symmetrical sets, with two screws in each set.

[0015] Furthermore, the smoothing layer is uniformly coated along the lower end face of the guide plate, and the smoothing layer is a graphite coating with a thickness of ten to fifteen micrometers.

[0016] The twin-screw extruder granulator proposed in this utility model has the following advantages:

[0017] 1. This utility model provides a guide plate with a smooth layer and a mounting frame with a vertical exhaust heat dissipation structure on the mounting platform. It also provides an inner heat dissipation groove with a heat-conducting layer on the first and second conveyors, and a central heat-conducting plate structure with heat dissipation holes in the inner heat dissipation groove. When the first and second conveyors are in operation for a long time, the accumulated heat between them can be quickly guided and vertically dissipated to avoid the heat between the first and second conveyors not being able to dissipate in time, thus reducing their service life.

[0018] 2. By setting a support column structure between the support leg and the guide plate, this utility model further improves the structural stability between the guide plate and the support leg, avoids the guide plate from shaking, and ensures the effect of guiding and heat dissipation. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0020] Figure 2 For the present utility model Figure 1 A three-dimensional schematic diagram of a mounting platform with a flow guide plate and a heat sink.

[0021] Figure 3 For the present utility model Figure 2 A front perspective view of the overall structure.

[0022] Figure 4 For the present utility model Figure 3 Enlarged view of a partial cross-section at point M in the middle;

[0023] Figure 5 For the present utility model Figure 2 A side view of the overall structure.

[0024] In the diagram: 1. Barrel; 10. Base plate; 11. First conveyor; 12. Second conveyor; 2. Support leg; 21. Support column; 3. Outer heat dissipation groove; 4. Guide plate; 41. Smoothing layer; 5. Mounting platform; 51. Guide hole; 6. Inner heat dissipation groove; 61. Central heat conduction plate; 62. Heat dissipation hole; 63. Heat conduction layer; 7. Heat dissipation frame; 71. Screw; 72. Heat exhaust hole; 8. Heat exhaust cover; 81. Top dustproof net; 82. Lower dustproof net; 83. Heat extraction fan. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figure 1-5 A twin-screw extruder granulator includes a barrel 1 and a guide plate 4. A base plate 10 is provided below the barrel 1. Support legs 2 are provided on the base plate 10. Mounting platform 5 is provided on the support legs 2. A first conveyor 11 and a second conveyor 12 are provided on the mounting platform 5. The outer shells of the first conveyor 11 and the second conveyor 12 are provided with an outer heat dissipation groove 3 and an inner heat dissipation groove 6. A heat-conducting layer 63 and a middle heat-conducting plate 61 are provided in the inner heat dissipation groove 6. Heat dissipation holes 62 are provided on the middle heat-conducting plate 61. A heat dissipation frame 7 is provided on the outer shells of the first conveyor 11 and the second conveyor 12. A heat dissipation cover 8 and heat dissipation holes 72 are provided on the heat dissipation frame 7. A top dustproof net 81 and a bottom dustproof net 82 are provided inside the heat dissipation cover 8.

[0027] The mounting platform 5 has a flow guide hole 51, and the heat exhaust cover 8 is equipped with a heat extraction fan 83.

[0028] The heat dissipation frame 7 is equipped with screws 71, the guide plate 4 is equipped with a smoothing layer 41, and the support leg 2 is equipped with a support column 21. Some of the structures described in this patent are common structures of twin-screw extruders and granulators, which are existing technologies. Some existing structures are not marked and need not be described in detail. Among them, the first feeder 11 and the second feeder 12 are both existing feed motors. In addition, the outer heat dissipation groove 3 can further improve the overall heat dissipation of the first feeder 11 and the second feeder 12.

[0029] The heat dissipation hole 62 is vertically connected to the central heat-conducting plate 61 and vertically aligned with the guide hole 51, which further improves the ability to draw away and dissipate the accumulated heat from bottom to top.

[0030] The guide hole 51 has a downward diffused internal hole structure, which allows the cold air to flow quickly into the guide hole 51.

[0031] The inner heat dissipation groove 6 is a rectangular opening groove with five vertically arranged grooves. The heat-conducting layer 63 is evenly arranged along the inner wall of the inner heat dissipation groove 6. The heat-conducting layer 63 is an organic silicone grease coating, which is durable and has excellent thermal conductivity. Combined with the five inner heat dissipation grooves 6, the heat generated by the operation of the first conveyor 11 and the second conveyor 12 can be quickly transferred to the central heat-conducting plate 61.

[0032] The overall structure of the deflector 4 is arc-shaped, and the support column 21 is set between the deflector 4 and the support leg 2, which improves the structural stability between the deflector 4 and the support leg 2 and prevents the deflector 4 from shaking.

[0033] The central heat-conducting plate 61 has a rectangular plate structure. Both ends of the central heat-conducting plate 61 are in close contact with the inner heat dissipation groove 6. The heat dissipation cover 8 has a hollow cavity inside and is connected to the heat dissipation hole 72. The central heat-conducting plate 61 is made of red copper, which has excellent thermal conductivity and can quickly transfer heat. Combined with the bottom-up air extraction effect of the heat extraction fan 83, the heat can be quickly extracted and discharged.

[0034] The top dustproof net 81 and the bottom dustproof net 82 are respectively located at the top and bottom of the heat extraction fan 83. The filter elements of the top dustproof net 81 and the bottom dustproof net 82 are made of non-woven fabric to prevent external dust particles from entering the heat extraction fan 83.

[0035] The heat sink 7 has a trapezoidal structure and is a through-type structure. The screws 71 are arranged in two symmetrical sets, with two screws in each set. The trapezoidal structure of the heat sink 7 ensures high stability.

[0036] Screw 71 passes through heat sink 7 and is threadedly connected to the housing of the first feeder 11 and the second feeder 12 respectively. When not in use, screw 71 can be removed first, and the heat sink 7 can be disassembled as a whole, which is very convenient.

[0037] The smoothing layer 41 is uniformly coated along the lower end face of the guide plate 4. The smoothing layer 41 is a graphite coating with a thickness of ten to fifteen micrometers. The graphite coating can effectively prevent the accumulation of pollutants on the surface, avoid flatness and smoothness, and enable the cold air on both sides of the bottom to be quickly guided along the lower end face of the guide plate 4 into the guide hole 51.

[0038] Working method: A certain amount of extruded raw material is fed into the barrel 1. Then, the first feeder 11 and the second feeder 12 are started. The preset feeding screws on the first feeder 11 and the second feeder 12 are meshed with each other, so that the extruded raw material in the barrel 1 is heated and transported and mixed at the same time. Finally, it is extruded and formed through the preset extrusion head at the right end of the barrel 1 (existing technology).

[0039] Before starting work, the heat extraction fan 83 can be turned on. During long-term operation, heat will be generated and accumulated between the first conveyor 11 and the second conveyor 12 in the middle heat-conducting plate 61. As the activated heat extraction fan 83 will generate an upward suction force, the cold air on the bottom outside will quickly enter the guide hole 51 along the guide plate 4. Then, the cold air will exchange heat with the heat accumulated in the middle heat-conducting plate 61. After heat exchange, the cold air will form a hot airflow, which will then pass upward through the heat exhaust hole 72 and be discharged, so as to avoid the working heat between the first conveyor 11 and the second conveyor 12 not being able to dissipate in time and reduce the service life.

[0040] In addition, by setting a support column 21 structure between the support leg 2 and the guide plate 4, the structural stability between the guide plate 4 and the support leg 2 is further improved, the guide plate 4 is prevented from shaking, and the heat dissipation effect is guaranteed.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A twin-screw extruder granulator, comprising a barrel (1) and a guide plate (4), characterized in that: The bottom of the barrel (1) is provided with a base plate (10), the base plate (10) is provided with a support leg (2), the support leg (2) is provided with a mounting platform (5), the mounting platform (5) is provided with a first conveyor (11) and a second conveyor (12), the outer shell of the first conveyor (11) and the second conveyor (12) are provided with an outer heat dissipation groove (3) and an inner heat dissipation groove (6), the inner heat dissipation groove (6) is provided with a heat-conducting layer (63) and a middle heat-conducting plate (61), the middle heat-conducting plate (61) is provided with a heat dissipation hole (62), the outer shell of the first conveyor (11) and the second conveyor (12) is provided with a heat dissipation frame (7), the heat dissipation frame (7) is provided with a heat exhaust cover (8) and a heat exhaust hole (72), the heat exhaust cover (8) is provided with a top dustproof net (81) and a bottom dustproof net (82); The mounting platform (5) is provided with a flow guide hole (51), and the heat exhaust cover (8) is provided with a heat extraction fan (83). The heat sink (7) is provided with screws (71), the guide plate (4) is provided with a smoothing layer (41), and the support leg (2) is provided with a support column (21).

2. The twin-screw extruder granulator according to claim 1, characterized in that: The heat dissipation hole (62) is vertically penetrating the central heat-conducting plate (61) and vertically aligned with the flow guide hole (51). The flow guide hole (51) has a downward diffusion type inner hole structure.

3. The twin-screw extruder granulator according to claim 1, characterized in that: The inner heat dissipation groove (6) is a rectangular opening groove with five vertically arranged grooves, and the heat-conducting layer (63) is evenly arranged along the inner wall of the inner heat dissipation groove (6).

4. The twin-screw extruder granulator according to claim 1, characterized in that: The guide plate (4) is an arc-shaped structure, and the support column (21) is located between the guide plate (4) and the support leg (2).

5. A twin-screw extruder granulator according to claim 1, characterized in that: The central heat-conducting plate (61) is a rectangular plate structure. The two ends of the central heat-conducting plate (61) are in close contact with the inner heat dissipation groove (6). The heat exhaust cover (8) has a hollow cavity inside and is connected to the heat exhaust hole (72). The top dustproof net (81) and the bottom dustproof net (82) are respectively located at the top and bottom of the heat extraction fan (83).

6. A twin-screw extruder granulator according to claim 1, characterized in that: The heat sink (7) is a trapezoidal structure with a through-type front and back. The screws (71) are arranged in two symmetrical sets, with two screws in each set.

7. A twin-screw extruder granulator according to claim 1, characterized in that: The smoothing layer (41) is uniformly coated along the lower end face of the guide plate (4), and the smoothing layer (41) is a graphite coating with a thickness of ten to fifteen micrometers.

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