A twin-screw extruder

Abstract

The application relates to the field of food processing equipment, in particular to a double-screw bulking machine which comprises a machine body, a quantitative feeding mechanism is mounted on the inner wall of the machine body, a blockage prevention mechanism is mounted on the inner wall of the machine body, two discharge ports are arranged at one end of the machine body, a feeding pipe is fixedly connected to the top of the quantitative feeding mechanism, the quantitative feeding mechanism comprises a feeding pipe, the bottom of the feeding pipe is fixedly connected to the top of the machine body, a hollow plate is fixedly connected to the inner wall of the feeding pipe, an intermittent assembly is mounted on the inner wall of the hollow plate, and a driving motor is fixedly connected to the top of the hollow plate. The quantitative feeding mechanism can control the feeding amount according to actual production conditions when the inside of the bulking machine is fed, so that the screw load is not too large and the material is not coked due to excessive feeding.

Description

Technical Field

[0001] This application relates to the field of food processing equipment, and more particularly to a twin-screw extruder. Background Technology

[0002] Pet food extrusion processing machinery mainly includes twin-screw extruders, which use two meshing screws to rotate and force the material forward under high temperature and pressure to complete the mixing, cooking, and extrusion processes, suitable for various raw material formulations. Single-screw extruders, on the other hand, rely on a single screw for extrusion, have a simple structure and lower cost, and are suitable for small and medium-sized production.

[0003] A twin-screw extruder uses two meshing screws that rotate in the same or opposite directions within a barrel, forming a sealed chamber. Material enters through the feed inlet and is conveyed forward by the rotating screws. During this process, it is subjected to compression, shearing, friction, and external heating, resulting in gelatinization and maturation under high temperature and pressure. As it passes through the die, the pressure drops sharply, and the moisture rapidly vaporizes, achieving extrusion. It is suitable for processing complex formulas such as pet food and aquatic feed, and is especially suitable for raw materials with high fiber and oil content. It can also be used to produce extruded snacks, nutritional rice cereal, and other foods. Capable of processing a variety of materials, it boasts high production efficiency and good product stability, making it a commonly used piece of equipment in medium to large-scale production lines.

[0004] In the prior art, some twin-screw extruders directly feed materials into the extruder during processing. However, when the amount of material fed into the extruder at one time is too large, it can cause excessive screw load, material retention and coking, resulting in a decrease in the quality of material processing. Therefore, a twin-screw extruder is provided. Utility Model Content

[0005] The purpose of this application is to provide a twin-screw extruder that aims to improve the problem that excessive screw load and material retention and coking can occur when too much material is added at one time, thus causing a decline in the quality of material processing.

[0006] The twin-screw extruder provided in this application adopts the following technical solution: A twin-screw extruder using the above technology includes a machine body, a quantitative feeding mechanism installed on the inner wall of the machine body, an anti-clogging mechanism installed on the inner wall of the machine body, two discharge ports opened at one end of the machine body, and a feed pipe fixedly connected to the top of the quantitative feeding mechanism; The quantitative feeding mechanism includes a feeding pipe, the bottom of which is fixedly connected to the top of the machine body. A hollow plate is fixedly connected to the inner wall of the feeding pipe, and an intermittent component is installed on the inner wall of the hollow plate. A drive motor is fixedly connected to the top of the hollow plate. The feeding pipe serves as a material transmission channel, and its bottom is fixedly connected to the machine body to ensure a stable feeding path. The hollow plate provides a mounting carrier for the intermittent component. The drive motor is installed on the top of the hollow plate, and can drive the intermittent component to operate through motor start-up, thereby realizing intermittent control of the feeding process. This allows for precise control of the feeding amount each time according to actual needs, avoiding excessive material input that could affect the operating efficiency of the extruder.

[0007] Preferably, the anti-clogging mechanism includes a fixed motor, one end of which is fixedly connected to a rotating rod, the outer wall of which is fixedly connected to a control bevel gear, and the inner wall of the machine body is rotatably connected to a connecting column, both ends of which are fixedly connected to transmission bevel gears. By adopting the above technical solution, the rotating rod is driven to rotate by the power source, which drives the outer wall control bevel gear to rotate synchronously. The control bevel gear transmits power to the transmission bevel gears at both ends of the connecting column through meshing transmission, so that the connecting column rotates and realizes bidirectional power transmission, providing a power basis for the stirring of the anti-clogging mechanism and the rotation of the auger, forming a linkage anti-clogging mechanism.

[0008] Preferably, the intermittent component includes a rotating column, a rotating plate is slidably connected to the inner wall of the hollow plate, one end of the rotating column is fixedly connected to the drive end of the drive motor, and a rotating disk is fixedly connected to the outer wall of the rotating column; By adopting the above technical solution, after the drive motor starts, the rotating column serves as the power transmission hub, with one end fixedly connected to the motor drive end, which can convert the motor power into its own rotational power; the rotating disk is slidably sleeved on the outer wall of the rotating column and makes circular motion with the rotating column, providing a power source for controlling the intermittent rotation of the rotating plate, and realizing the periodic opening and closing of the feed port through the cooperation of the rotating disk and the rotating plate.

[0009] Preferably, the inner wall of the rotating plate is provided with multiple feeding ports, and the outer wall of the rotating column is fixedly connected with a control rod; By adopting the above technical solution, multiple discharge ports opened on the inner wall of the rotating plate correspond to the bottom of the feed pipe. When the rotating plate rotates to the point where the discharge port is aligned with the feed pipe, the material can fall into the machine body through the discharge port. The control rod is fixed to the outer wall of the rotating column and makes a circular motion with the rotating column. When its end contacts the rotating plate, it can push the rotating plate to rotate. The rotation angle of the control rod can be used to precisely control the rotation amplitude of the rotating plate and realize the triggering of a single discharge action.

[0010] Preferably, the inner wall of the rotating plate is provided with a plurality of control slots, and one end of the control rod is in contact with the inner wall of one of the control slots; By adopting the above technical solution, multiple control slots on the inner wall of the rotating plate provide a motion track for the control rod. After the end of the control rod is embedded in the control slot, it slides along the inner wall of the control slot when rotating with the rotating column. Due to the specific shape design of the control slot, the rotating plate can produce a single rotation action under the action of the control rod. When the control rod is disengaged from the control slot, the rotating plate stops rotating, thereby realizing the intermittent control of the opening and closing of the feeding port and ensuring the accuracy of the feeding amount each time.

[0011] Preferably, one end of the rotating rod is fixedly connected to an auger, and the outer wall of the auger is rotatably connected to the inner wall of the machine body; By adopting the above technical solution, the auger fixed at one end of the rotating rod rotates with the rotating rod. The outer wall of the auger is rotatably connected to the inner wall of the machine to form a sealed rotating space. When the auger's spiral blades rotate, they can generate an axial pushing force on the material. On the one hand, it breaks up the lumpy material, and on the other hand, it pushes the material to move into the machine body, avoiding the material from accumulating at the feed inlet due to high temperature and ensuring the continuity of the feeding process.

[0012] Preferably, a rotating bevel gear is rotatably connected to the inner wall of the machine body, and a stirrer is fixedly connected to the outer wall of the rotating bevel gear; By adopting the above technical solution, the rotating bevel gear meshes with the transmission bevel gear. When the transmission bevel gear rotates, it drives the rotating bevel gear to rotate. The agitator fixed on the outer wall of the rotating bevel gear rotates synchronously with it. The blades of the agitator stir and tumble the material in the machine body, breaking the material's agglomerated structure and making the material evenly distributed. This further prevents the blockage problem caused by material accumulation during the feeding process and improves the stability of feeding.

[0013] Preferably, the top of the control bevel gear is meshed with the outer wall of one of the drive bevel gears, and the outer side of the rotating bevel gear is meshed with the outer side of the other drive bevel gear. By adopting the above technical solution, the top of the control bevel gear meshes with one of the transmission bevel gears, transmitting the rotational power of the rotating rod to the transmission bevel gear, which drives the connecting column to rotate; the transmission bevel gear at the other end of the connecting column meshes with the rotating bevel gear, transmitting power to the rotating bevel gear, forming a two-stage gear transmission chain, realizing the efficient transmission of power from the rotating rod to the agitator, so that the auger rotation and the agitator rotation are synchronized, working together to complete the anti-blocking function, ensuring that the material remains in a loose state during the conveying and unloading process.

[0014] In summary, this application includes at least one of the following beneficial technical effects: 1. By adopting a mechanism that enables quantitative feeding, the amount of material fed into the extruder can be controlled according to the actual production situation. This avoids excessive screw load and material stagnation and coking due to excessive feeding, or idling wear due to insufficient feeding, thus ensuring stable equipment operation and reducing downtime.

[0015] 2. By using the auger on the inner wall of the screw extruder to transport materials, the anti-blocking component also rotates synchronously. This prevents the feed from clumping and accumulating due to the high temperature caused by the connection between the feed inlet and the twin screw extruder when feeding into the extruder body, thus preventing continuous feeding. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a twin-screw extruder proposed in this utility model; Figure 2 This is a schematic diagram of the body of a twin-screw extruder proposed in this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the discharge port of a twin-screw extruder proposed in this utility model; Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the connecting column of a twin-screw extruder proposed in this utility model; Explanation of reference numerals in the attached drawings: 1. Extruder body; 2. Quantitative feeding mechanism; 21. Feeding pipe; 22. Drive motor; 23. Hollow plate; 24. Intermittent assembly; 241. Rotating column; 242. Control rod; 243. Control groove; 244. Rotating disc; 245. Feeding port; 246. Rotating plate; 3. Anti-blocking mechanism; 31. Control bevel gear; 32. Transmission bevel gear; 33. Connecting column; 34. Rotating bevel gear; 35. Agitator; 36. Rotating rod; 37. Fixed motor; 4. Screwdriver; 5. Discharge port; 6. Feeding pipe. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1 To be continued Figure 6 This application will be described in further detail below.

[0018] Example 1: A twin-screw extruder, referring to... Figure 1 , Figure 4 and Figure 5The invention includes a twin-screw extruder, comprising a machine body, an inner wall of which is equipped with a quantitative feeding mechanism 2 for controlling the feeding amount under different processing conditions, an anti-clogging mechanism 3 for preventing sticking at the feeding port 245 during feeding, and two discharge ports 5 at one end of the machine body for feeding processed extruded food. A feeding pipe 6 is fixedly connected to the top of the quantitative feeding mechanism 2, and the quantitative feeding mechanism 2 includes a feeding pipe 21, the bottom of which is fixed... A hollow plate 23 is fixedly connected to the inner wall of the feeding pipe 21, which is connected to the top of the machine body. An intermittent component 24 is installed on the inner wall of the hollow plate 23, and a drive motor 22 is fixedly connected to the top of the hollow plate 23. The intermittent component 24 can realize intermittent control of the feeding process, ensuring that the feeding amount can be accurately adjusted according to the actual situation. The drive motor 22 is fixedly connected to the top of the hollow plate 23, and the drive motor 22 provides power for the operation of the intermittent component 24.

[0019] Specifically, the twin-screw extruder includes a machine body, the inner wall of which is equipped with a quantitative feeding mechanism 2 and an anti-clogging mechanism 3. One end has two discharge ports 5 for feeding extruded food. The top of the quantitative feeding mechanism 2 is connected to a feeding pipe 6, which consists of a feeding pipe 21, a hollow plate 23, an intermittent component 24, and a drive motor 22. The hollow plate 23 is fixed to the inner wall of the feeding pipe 21, and the drive motor 22 is installed on the top of the hollow plate 23 to provide power to the intermittent component 24. The intermittent component 24 can realize intermittent control of the feeding process and precisely adjust the feeding amount each time.

[0020] The intermittent assembly 24 includes a rotating column 241, which is a key component for transmission. A rotating plate 246 is slidably connected to the inner wall of the hollow plate 23. The rotating plate 246 can change the alignment state between the discharge port 245 and the feed pipe 6 by sliding, thereby controlling the start and stop of the discharge. One end of the rotating column 241 is fixedly connected to the drive end of the drive motor 22, so that the power of the drive motor 22 can be directly transmitted to the rotating column 241. A rotating disk 244 is fixedly connected to the outer wall of the rotating column 241. The rotating disk 244 rotates with the rotating column 241 and drives the control rod 242 to perform circular motion. The inner wall of the rotating plate 246... The wall has multiple feeding ports 245 for material to pass through and be fed into the extruder body 1. A control rod 242 is fixedly connected to the outer wall of the rotating column 241. The control rod 242 rotates with the rotating column 241 and interacts with the control groove 243 of the rotating plate 246. Multiple control grooves 243 are provided on the inner wall of the rotating plate 246. The control grooves 243 cooperate with the control rod 242 to guide the rotating plate 246 to rotate according to a predetermined pattern. One end of the control rod 242 contacts the inner wall of one of the control grooves 243. The movement of the control rod 242 in the control groove 243 drives the rotating plate 246 to rotate. Specifically, in the intermittent component 24, one end of the rotating column 241 is fixed to the drive end of the drive motor 22, and the power is directly transmitted to the rotating column 241 by the drive motor 22. The outer wall of the rotating column 241 is slidably connected to the rotating disk 244. The rotating disk 244 rotates with the rotating column 241 and drives the control rod 242 to make a circular motion. The rotating plate 246 is slidably connected to the inner wall of the hollow plate 23. The inner wall has multiple discharge ports 245 and control grooves 243. The control rod 242 is fixed to the outer wall of the rotating column 241, and one end is in contact with the inner wall of the control groove 243. When the rotating column 241 rotates, it interacts with the control groove 243 to guide the rotating plate 246 to rotate according to a predetermined pattern. The start and stop of feeding are controlled by changing the alignment state between the discharge port 245 and the feed pipe 6.

[0021] Reference Figure 1 , Figure 4 and Figure 6 The anti-blocking mechanism 3 includes a fixed motor 37, which is the starting component of the transmission chain of the anti-blocking mechanism 3. A rotating rod 36 is fixedly connected to one end of the fixed motor 37. The rotating rod 36 is used to transmit power and drive the auger 4 and the control bevel gear 31 to rotate. The control bevel gear 31 is fixedly connected to the outer wall of the rotating rod 36 so that the rotating rod 36 can drive the control bevel gear 31 to rotate synchronously. A connecting column 33 is rotatably connected to the inner wall of the machine body. The connecting column 33 serves as a transmission intermediate component to realize the transmission of power between different components. Both ends of the connecting column 33 are fixedly connected to transmission bevel gears 32. The transmission bevel gears 32 mesh with the control bevel gear 31 and the rotating bevel gear 34 to realize the reversal and transmission of power. An auger 4 is fixedly connected to one end of the rotating rod 36. The auger 4 processes the material by rotating.

[0022] Specifically, the anti-blocking mechanism 3 uses a fixed motor 37 as the transmission starting component. Its drive end is fixedly connected to a rotating rod 36. A control bevel gear 31 is fixed on the outer wall of the rotating rod 36, which can rotate synchronously. The inner wall of the machine body is rotatably connected to a connecting column 33, which has transmission bevel gears 32 at both ends, respectively meshing with the control bevel gear 31 and the rotating bevel gear 34. One end of the rotating rod 36 is fixed to an auger 4 for processing materials. Its outer wall is rotatably connected to the machine body to ensure stability. The top of the control bevel gear 31 meshes with a transmission bevel gear 32, transmitting the power of the rotating rod 36 to the connecting column 33.

[0023] The outer wall of the auger 4 is rotatably connected to the inner wall of the machine body to ensure the stability of the auger 4's rotation. The inner wall of the machine body is rotatably connected to a rotating bevel gear 34. The rotating bevel gear 34 transmits power to the agitator 35 by meshing with the transmission bevel gear 32. The outer wall of the rotating bevel gear 34 is fixedly connected to the agitator 35. The agitator 35 agitates the material by rotating, further preventing blockage during feeding. The top of the control bevel gear 31 is meshed with the outer wall of one of the transmission bevel gears 32. Through meshing transmission, the power of the rotating rod 36 is transmitted to the connecting column 33. The outer side of the rotating bevel gear 34 is meshed with the outer side of the other transmission bevel gear 32. Through meshing transmission, the power of the connecting column 33 is transmitted to the rotating bevel gear 34, thereby driving the agitator 35 to rotate. Specifically, the transmission bevel gear 32 at the other end of the connecting column 33 meshes with the rotating bevel gear 34, transmitting power to the rotating bevel gear 34. The agitator 35 fixed on its outer wall rotates accordingly. The agitator 35 stirs the material by rotating, thereby further preventing blockage during feeding. The entire mechanism transmits the power of the rotating rod 36 through the connecting column 33 via the bevel gear transmission chain, while simultaneously driving the auger 4 to process the material and stir the agitator 35 to prevent blockage, thus achieving dual-function coordinated operation.

[0024] Working principle: When it is necessary to feed material into the extruder, the drive motor 22 starts, which drives the rotating column 241 to rotate. The rotation of the rotating column 241 drives the rotating disk 244 to rotate. The rotation of the rotating disk 244 causes the control rod 242 to move in a circular motion, so that the control rod 242 contacts the control groove 243 opened inside the rotating plate 246. At this time, the rotation of the control rod 242 causes the rotating plate 246 to rotate once, so that the hole of the discharge port 245 is aligned with the bottom of the feed pipe 6. At this time, the material can be fed into the discharge port 245 through the feed pipe 6. After one feeding is completed, the drive motor 22 starts again, causing the rotating plate 246 to rotate once. Then, the discharge port 245 is no longer aligned with the feed pipe 6, so that the material is no longer fed into the inner wall of the extruder body 1. This controls the feeding into the extruder body 1, so that the amount of material fed each time can be controlled according to the actual situation.

[0025] When feeding material into the extruder body 1, the feed clumps and accumulates due to the connection between the feed inlet and the twin-screw extruder at high temperatures, preventing continuous feeding. Therefore, the anti-blocking mechanism 3 is activated. The activation of the anti-blocking mechanism 3 drives the auger 4 to rotate continuously via the rotating rod 36, thereby processing the material. At this time, the rotation of the rotating rod 36 drives the control bevel gear 31 to rotate, which in turn drives the transmission bevel gear 32 to rotate. The transmission bevel gear 32 then drives the transmission bevel gear 32 at the top of the connecting column 33 to rotate, which in turn drives the rotating bevel gear 34 to rotate, thereby rotating the agitator 35. This stirs the material during feeding and prevents blockage that could prevent continuous feeding.

[0026] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A twin-screw extruder, comprising a machine body (1), characterized in that, The inner wall of the machine body (1) is equipped with a quantitative feeding mechanism (2), the inner wall of the machine body (1) is equipped with an anti-clogging mechanism (3), and two discharge ports (5) are opened at one end of the machine body (1). The top of the quantitative feeding mechanism (2) is fixedly connected to a feed pipe (6). The quantitative feeding mechanism (2) includes a feeding pipe (21), the bottom of which is fixedly connected to the top of the machine body (1), a hollow plate (23) is fixedly connected to the inner wall of the feeding pipe (21), an intermittent component (24) is installed on the inner wall of the hollow plate (23), and a drive motor (22) is fixedly connected to the top of the hollow plate (23).

2. The twin-screw extruder according to claim 1, characterized in that, The anti-blocking mechanism (3) includes a fixed motor (37), one end of which is fixedly connected to a rotating rod (36), the outer wall of which is fixedly connected to a control bevel gear (31), the inner wall of the body (1) is rotatably connected to a connecting column (33), and both ends of the connecting column (33) are fixedly connected to a transmission bevel gear (32).

3. A twin-screw extruder according to claim 1, characterized in that, The intermittent component (24) includes a rotating column (241), a rotating plate (246) is slidably connected to the inner wall of the hollow plate (23), one end of the rotating column (241) is fixedly connected to the driving end of the drive motor (22), and a rotating disk (244) is fixedly connected to the outer wall of the rotating column (241).

4. A twin-screw extruder according to claim 3, characterized in that, The inner wall of the rotating plate (246) is provided with multiple discharge ports (245), and the outer wall of the rotating column (241) is fixedly connected with a control rod (242).

5. A twin-screw extruder according to claim 4, characterized in that, The inner wall of the rotating plate (246) is provided with a plurality of control slots (243), and one end of the control rod (242) is in contact with the inner wall of one of the control slots (243).

6. A twin-screw extruder according to claim 2, characterized in that, One end of the rotating rod (36) is fixedly connected to an auger (4), and the outer wall of the auger (4) is rotatably connected to the inner wall of the machine body (1).

7. A twin-screw extruder according to claim 6, characterized in that, The inner wall of the machine body (1) is rotatably connected to a rotating bevel gear (34), and the outer wall of the rotating bevel gear (34) is fixedly connected to a stirrer (35).

8. A twin-screw extruder according to claim 7, characterized in that, The top of the control bevel gear (31) is meshed with the outer wall of one of the transmission bevel gears (32), and the outer side of the rotating bevel gear (34) is meshed with the outer side of the other transmission bevel gear (32).

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