Extruder cutting mechanism

Abstract

The utility model relates to twin screw extruder technical field, concretely is a kind of extruder granulating mechanism, including head, the extrusion end of head is equipped with granulating shell, and the side top of granulating shell is provided with the clamping groove that is attached in the outer wall of head, the bottom of granulating shell is designed as discharge gate, the other side of granulating shell is fixedly installed with motor, and the output shaft of motor is fixedly installed with the shaft, the outer wall one end of the shaft is fixedly installed with annular rotary drum, and the outer wall one side of annular rotary drum is fixedly installed with the cutter of equidistance distribution, the outer wall other side of annular rotary drum is provided with heating assembly;The utility model ensures cutter to keep appropriate temperature, avoid molten material to stick because cutter temperature is too low, and the heat in head heating groove is transferred to annular heating cylinder inside, auxiliary maintenance heating assembly's operation, without heating assembly excessive energy consumption, improve heat transfer efficiency, form double temperature guarantee to cutter, ensure processing stability.

Description

Technical Field

[0001] This utility model relates to the field of twin-screw extruder technology, specifically an extruder pelletizing mechanism. Background Technology

[0002] Twin-screw extruders hold a significant position in pelleting due to their excellent material plasticizing and mixing properties, especially suitable for applications requiring high pellet quality. Their application in pelleting primarily involves combining with various pelleting methods to process extruded molten or strip-shaped materials into uniform pellets. A common pelleting method is hot pelleting. After the material is fully plasticized and mixed by the twin-screw extruder, it is extruded from the die head as a molten strip or ribbon. A cutter is directly installed at the die head outlet, rotating at high speed close to the die exit to instantly cut the molten material into pellets.

[0003] Currently, in the hot cutting process of twin-screw extruders, when the high-temperature molten material passes through the die head, it is hot-cut by the heated die surface. After the hot cutting blade is installed, it fits against the die surface, and the die surface maintains a certain temperature. When the molten material passes through, the blade cuts it into the required shape and length. During the hot cutting process, the temperature control of the blade is very important. Too high or too low a temperature will affect the quality of the cut surface and the appearance of the product. Therefore, it is urgent to design an extruder pelletizing mechanism to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an extruder pelletizing mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An extruder pelletizing mechanism includes a die head, a pelletizing shell installed at the extrusion end of the die head, and a groove for fitting against the outer wall of the die head is provided on the top side of one side of the pelletizing shell. The bottom of the pelletizing shell is designed as a discharge port. A motor is fixedly installed on the other side of the pelletizing shell, and a rotating shaft is fixedly installed on the output shaft of the motor. An annular rotating cylinder is fixedly installed on one end of the outer wall of the rotating shaft, and cutters evenly distributed are fixedly installed on one side of the outer wall of the annular rotating cylinder. A heating component is provided on the other side of the outer wall of the annular rotating cylinder.

[0007] Furthermore, the cutter is designed to be hollow, with one end of the cutter having a blade-like shape, and the part of the cutter near the blade having an arc surface.

[0008] Furthermore, a second opening is provided on one side of the bottom of the cutter and on the annular rotating cylinder, and the second opening connects the interior of the cutter and the interior of the annular rotating cylinder.

[0009] Furthermore, the heating assembly includes an annular heating cylinder rotatably disposed on the other side of the outer wall of the annular rotating drum via a sealed bearing, and multiple mounting seats are fixedly installed on one side of the annular heating cylinder and the other side of the inner wall of the pelletizing shell. An electric heating tube is fixedly installed inside the annular heating cylinder, and a first opening is provided on the other side of the outer wall of the annular rotating drum, and the first opening connects the interior of the annular rotating drum and the interior of the annular heating cylinder.

[0010] Furthermore, multiple heat-conducting fins are installed on the inner wall of the cutter and the inner wall of the annular rotating cylinder.

[0011] Furthermore, a discharge mold plate is installed in the middle of one side of the machine head, and the blade of the cutter is attached to one side of the discharge mold plate. The machine head is provided with a machine head heating groove inside, and multiple insertion holes are opened on one side of the machine head heating groove. Multiple heat conduction pipes are fixed on the top of the annular heating cylinder, and one end of the heat conduction pipe extends through the insertion hole into the machine head heating groove. The outer wall of the heat conduction pipe is equipped with a sealing ring for sealing the insertion hole.

[0012] Furthermore, the outer wall of the machine head and the outer wall of the pelletizing shell are both fixed with multiple lugs, and two adjacent lugs are fixed by screws.

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

[0014] In this invention, the heat generated by the heating component enters the annular rotating drum through the first port and then enters the cutter through the second port. In conjunction with the heat-conducting plates on the inner wall of the annular rotating drum, the cutter can be heated efficiently, ensuring that the cutter maintains a suitable temperature and preventing the molten material from sticking together due to the low temperature of the cutter, thus ensuring that the cut surface of the particles is flat and the shape is regular.

[0015] In this invention, the annular heating cylinder is connected to the machine head heating groove through a heat-conducting pipe, so that the heat in the machine head heating groove is transferred to the inside of the annular heating cylinder, which helps to maintain the operation of the heating component. This eliminates the need for excessive energy consumption by the heating component, improves heat transfer efficiency, and forms a dual temperature guarantee for the cutting blade, ensuring processing stability. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of an extruder pelletizing mechanism.

[0017] Figure 2 This is a front sectional view of an extruder pelletizing mechanism.

[0018] Figure 3 This is a three-dimensional sectional view of an extruder pelletizing mechanism.

[0019] Figure 4 This is a schematic diagram of the insertion hole structure of an extruder pelletizing mechanism.

[0020] Figure 5 This is a schematic diagram of the annular heating cylinder and heat conduction pipe structure of an extruder pelletizing mechanism.

[0021] Figure 6 This is a schematic diagram of the second port structure of an extruder pelletizing mechanism.

[0022] Figure 7 This is a schematic diagram of the first port structure of an extruder pelletizing mechanism.

[0023] In the diagram: 1. Machine head; 2. Pelletizing shell; 3. Motor; 4. Ear seat; 5. Machine head heating groove; 6. Rotating shaft; 7. Annular rotating drum; 8. Annular heating cylinder; 9. Cutter; 10. Heat conducting pipe; 11. Heat conducting plate; 12. Electric heating tube; 13. Mounting base; 14. Sealing ring; 15. Insertion hole; 16. Discharge mold plate; 17. Second port; 18. First port. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-7In this embodiment of the present invention, an extruder pelletizing mechanism includes a die head 1. A pelletizing shell 2 is installed on the extrusion end of the die head 1. Multiple lugs 4 are fixed to the outer wall of both the die head 1 and the outer wall of the pelletizing shell 2, and adjacent lugs 4 are fixed by screws. A groove is provided on the top of one side of the pelletizing shell 2 to fit against the outer wall of the die head 1. The bottom of the pelletizing shell 2 is designed as a discharge port. A motor 3 is fixedly installed on the other side of the pelletizing shell 2, and a rotating shaft 6 is fixedly installed on the output shaft of the motor 3. An annular rotating cylinder 7 is fixedly installed on one end of the outer wall of the rotating shaft 6, and cutters 9 are fixedly installed at equal intervals on one side of the outer wall of the annular rotating cylinder 7. A heating component is provided on the other side of the outer wall of the annular rotating cylinder 7. The cutters 9 are hollow, and one end of the cutter 9 is blade-shaped. The cutter 9 near the blade is designed as an arc surface. A second opening 17 is provided on the annular rotating drum 7, and the second opening 17 connects the interior of the cutter 9 and the interior of the annular rotating drum 7. The heating assembly includes an annular heating cylinder 8, which is rotatably disposed on the other side of the outer wall of the annular rotating drum 7 via a sealed bearing. Multiple mounting seats 13 are fixedly installed on one side of the annular heating cylinder 8 and the other side of the inner wall of the pelletizing shell 2. An electric heating tube 12 is fixedly installed inside the annular heating cylinder 8. A first opening 18 is provided on the other side of the outer wall of the annular rotating drum 7, and the first opening 18 connects the interior of the annular rotating drum 7 and the interior of the annular heating cylinder 8. The heat generated by the heating assembly enters the annular rotating drum 7 through the first opening 18 and is then transmitted to the interior of the cutter 9 through the second opening 17. This can efficiently heat the cutter 9, prevent the molten material from sticking together due to the low temperature of the cutter 9, and ensure that the particle cut surface is flat and the shape is regular.

[0026] Specifically, multiple heat-conducting plates 11 are installed on the inner wall of the cutter 9 and the inner wall of the annular rotating cylinder 7. The heat-conducting plates 11 enhance heat transfer and keep the cutter 9 at a suitable temperature.

[0027] Specifically, a discharge mold plate 16 is installed in the middle of one side of the die head 1, and the blade of the cutter 9 is attached to one side of the discharge mold plate 16. The die head 1 is equipped with a die head heating groove 5, which is connected to the heating equipment of the twin-screw extruder. Multiple insertion holes 15 are opened on one side of the die head heating groove 5. Multiple heat conduction pipes 10 are fixed on the top of the annular heating cylinder 8, and one end of the heat conduction pipe 10 extends into the die head heating groove 5 through the insertion hole 15. The outer wall of the heat conduction pipe 10 is equipped with sealing rings 14 for sealing the insertion hole 15, so as to transfer the heat in the die head heating groove 5 to the inside of the annular heating cylinder 8, which helps to maintain the operation of the heating component. The heating component does not need to consume too much energy, improving the heat transfer efficiency and forming a dual temperature guarantee for the cutter 9 to ensure processing stability.

[0028] The working principle of this utility model is as follows: the pelletizing shell 2 is fixed to the machine head 1 through the ear seat 4, the annular heating cylinder 8 is fixed to the inner wall of the pelletizing shell 2 through the mounting seat 13, and the sealing bearing ensures the sealing between the annular rotating cylinder 7 and the annular heating cylinder 8.

[0029] During use, the material inside the die head 1 is kept in a molten state under the action of the die head heating groove 5 and is extruded through the discharge mold plate 16. The heat of the die head heating groove 5 is transferred to the annular heating cylinder 8 through the heat conduction pipe 10. At the same time, the electric heating pipe 12 heats the inside of the annular heating cylinder 8. The dual heat enters the inside of the annular rotating cylinder 7 through the first port 18.

[0030] Motor 3 drives shaft 6 to rotate, which in turn drives annular drum 7 and cutter 9 to rotate. Heat from annular drum 7 enters hollow cutter 9 through second port 17 and heat transfer is enhanced by heat-conducting plate 11, keeping cutter 9 at a suitable temperature. The rotating cutter 9 cuts the extruded molten material by adhering its blade to discharge mold plate 16. The granulated particles are discharged from the discharge port at the bottom of pelletizing shell 2.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention.

Claims

1. A pelletizing mechanism for an extruder, comprising a die head (1), characterized in that: The extrusion end of the die head (1) is equipped with a pelletizing shell (2), and a groove is provided on the top of one side of the pelletizing shell (2) to fit against the outer wall of the die head (1). The bottom of the pelletizing shell (2) is designed as a discharge port. A motor (3) is fixedly installed on the other side of the pelletizing shell (2), and a rotating shaft (6) is fixedly installed on the output shaft of the motor (3). An annular rotating drum (7) is fixedly installed on one end of the outer wall of the rotating shaft (6), and cutters (9) are fixedly installed at equal intervals on one side of the outer wall of the annular rotating drum (7). A heating component is provided on the other side of the outer wall of the annular rotating drum (7).

2. The extruder pelletizing mechanism according to claim 1, characterized in that: The cutter (9) is designed to be hollow, and one end of the cutter (9) is designed to be blade-shaped, with the cutter (9) near the blade being designed to be curved.

3. The extruder pelletizing mechanism according to claim 2, characterized in that: The bottom side of the cutter (9) is provided with a second opening (17) on the annular rotating cylinder (7), and the second opening (17) connects the interior of the cutter (9) and the interior of the annular rotating cylinder (7).

4. The extruder pelletizing mechanism according to claim 3, characterized in that: The heating assembly includes an annular heating cylinder (8) rotatably mounted on the other side of the outer wall of the annular rotating cylinder (7) via a sealed bearing. A plurality of mounting seats (13) are fixedly installed on one side of the annular heating cylinder (8) and the other side of the inner wall of the pellet shell (2). An electric heating tube (12) is fixedly installed inside the annular heating cylinder (8). A first opening (18) is provided on the other side of the outer wall of the annular rotating cylinder (7), and the first opening (18) connects the interior of the annular rotating cylinder (7) and the interior of the annular heating cylinder (8).

5. The extruder pelletizing mechanism according to claim 4, characterized in that: Multiple heat-conducting plates (11) are installed on the inner wall of the cutter (9) and the inner wall of the annular rotating cylinder (7).

6. The extruder pelletizing mechanism according to claim 5, characterized in that: A discharge mold plate (16) is installed in the middle of one side of the machine head (1), and the blade of the cutter (9) is attached to one side of the discharge mold plate (16). The machine head (1) is provided with a machine head heating groove (5), and multiple insertion holes (15) are opened on one side of the machine head heating groove (5). Multiple heat conduction pipes (10) are fixed on the top of the annular heating cylinder (8), and one end of the heat conduction pipe (10) extends through the insertion hole (15) into the machine head heating groove (5). The outer wall of the heat conduction pipe (10) is equipped with a sealing ring (14) for sealing the insertion hole (15).

7. The extruder pelletizing mechanism according to claim 1, characterized in that: The outer wall of the machine head (1) and the outer wall of the pelletizing shell (2) are both fixed with multiple lugs (4), and two adjacent lugs (4) are fixed by screws.

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