A feeding mechanism for a twin-screw extruder

Abstract

This utility model belongs to the field of twin-screw extruder feeding technology and discloses a twin-screw extruder feeding mechanism, including a support plate; the surface of the support plate is equipped with a shaking anti-accumulation component, which includes a feeding hopper disposed on the inner side of the support plate, four adjusting rods respectively installed at the four corners of the feeding hopper, a connecting frame for movement, an adjusting groove, a drive plate one, a drive plate two, and a bracket; the surface of the connecting frame is equipped with an auxiliary limiting component, which includes a limiting disc disposed on the outer side of the support plate and a guide rod slidably connected in a through hole on the surface of the connecting frame. This utility model has the advantages of being able to shake the feeding hopper to prevent blockage, avoiding a large amount of material accumulating in the feeding hopper, causing material conveying interruption, forcing the production line to stop for cleaning, seriously affecting production efficiency, and greatly improving the stability of material feeding.

Description

Technical Field

[0001] This utility model belongs to the field of twin-screw extruder feeding technology, specifically a twin-screw extruder feeding mechanism. Background Technology

[0002] As a core piece of equipment in polymer material processing, food processing, and chemical production, the stable operation of the feeding mechanism of a twin-screw extruder directly determines the overall production efficiency, product quality, and energy consumption level. In actual production, the feeding mechanism must accurately and continuously convey materials of different forms, such as granules, powders, or flakes, into the twin-screw barrel to provide a stable material supply for subsequent melting, mixing, and extrusion processes. Therefore, the uniformity and smoothness of the feeding mechanism have become one of the key indicators for evaluating the performance of a twin-screw extruder.

[0003] Currently, the feeding mechanism of mainstream twin-screw extruders typically consists of a feeding hopper, a drive motor, a conveying screw, and a transmission assembly. Among these, the feeding hopper, as a temporary storage and transition component for materials, plays a crucial role in the feeding effect through its structural design and functional implementation. However, the feeding hoppers of existing feeding mechanisms are mostly fixed-installation structures, relying solely on the material's own gravity and the rotational driving force of the conveying screw to achieve material falling and conveying, without any active intervention structure or sway handling mechanism to address material accumulation issues.

[0004] In practical applications, the aforementioned fixed-structure feeding hopper is prone to material accumulation and blockage. Specifically, when processing materials with a certain degree of viscosity, hygroscopicity, or uneven particle size (such as modified plastic granules, food additive powders, etc.), the adhesion of the material to the inner wall of the feeding hopper increases, making it easy to accumulate on the inner side of the hopper wall and at the junction of the hopper opening and the conveying screw. As the feeding process continues, the accumulated material will gradually compact and clump together, thereby blocking the feeding channel of the feeding hopper, which in turn affects the uniformity of subsequent melt mixing, ultimately causing quality defects such as uneven density, dimensional deviation, and performance fluctuation in the extruded products.

[0005] Therefore, a feeding mechanism for a twin-screw extruder is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a feeding mechanism for a twin-screw extruder, which has the advantages of being able to shake the feeding hopper to prevent blockage, avoiding a large amount of material accumulating in the feeding hopper, causing material conveying interruption, forcing the production line to stop for cleaning, seriously affecting production efficiency, and greatly improving the stability of material feeding.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a feeding mechanism for a twin-screw extruder, including a support plate;

[0008] The surface of the support plate is equipped with a shaking anti-accumulation component, which includes a feeding hopper disposed on the inner side of the support plate, four adjusting rods respectively installed at the four corners of the feeding hopper, a connecting frame for movement, an adjusting groove, a drive plate one, a drive plate two, and a bracket.

[0009] The surface of the connecting frame is equipped with an auxiliary limiting component, which includes a limiting disc disposed on the outer side of the support plate and a guide rod slidably connected to a through hole in the surface of the connecting frame.

[0010] Preferably, the adjusting rod is slidably connected in a groove opened on the surface of the support plate, the connecting frame is installed on the surface of the feeding hopper, the adjusting groove is opened on the surface of the support plate, and the connecting frame is slidably connected inside the adjusting groove, the first driving plate is hinged to the upper surface of the connecting frame, the second driving plate is hinged to the upper surface of the first driving plate, the bracket is installed on one side surface of the support plate, and the second driving plate is rotatably connected to the bottom surface of the bracket.

[0011] Preferably, a drive motor is mounted on the upper surface of the bracket, and the output end of the drive motor passes through the bracket and is connected to the drive plate.

[0012] Preferably, the surface of the support plate is pre-drilled with threaded holes for threaded installation.

[0013] Preferably, a flexible conveying pipe is installed at the discharge port of the feeding hopper.

[0014] Preferably, one end of the adjusting rod passes through the support plate and extends to the outside of the support plate, and is connected to the limiting plate.

[0015] Preferably, both ends of the guide rod pass through the connecting frame and are installed in the adjusting groove.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model, by setting up a shaking anti-accumulation component, with the feeding hopper, adjusting rod, connecting frame and other components working together, breaks the structural limitations of the traditional fixed feeding hopper. The feeding hopper can be moved by the driving component, avoiding the accumulation of materials in the hopper due to stickiness and hygroscopicity, reducing the risk of blockage from the source and ensuring the continuity of material conveying.

[0018] 2. This utility model incorporates an auxiliary limiting component, in which the limiting plate and guide rod work together to provide precise limiting for the movement of the feeding hopper, preventing the feeding hopper from shifting or moving excessively when it shakes. At the same time, it enhances the connection stability between the connecting frame and the support plate, avoiding a decrease in feeding accuracy due to loose parts, and ensuring the overall reliable operation of the mechanism. Attached Figure Description

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

[0020] Figure 2 This is a schematic diagram of the structure of drive board one and drive board two of this utility model;

[0021] Figure 3 This is a schematic diagram of the connecting frame and guide rod of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the feeding hopper and adjusting rod of this utility model.

[0023] In the diagram: 1. Support plate; 2. Anti-stacking assembly; 21. Feed hopper; 22. Adjusting rod; 23. Connecting frame; 24. Adjusting groove; 25. Drive plate one; 26. Drive plate two; 27. Bracket; 28. Drive motor; 3. Auxiliary limiting assembly; 31. Limiting plate; 32. Guide rod. 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] like Figures 1 to 4 As shown, this utility model provides a feeding mechanism for a twin-screw extruder, including a support plate 1;

[0026] The surface of the support plate 1 is equipped with a shaking anti-accumulation component 2. The shaking anti-accumulation component 2 includes a feeding hopper 21 set inside the support plate 1, four adjusting rods 22 respectively installed at the four corners of the feeding hopper 21, a connecting frame 23 for movement, an adjusting groove 24, a first drive plate 25, a second drive plate 26, and a bracket 27.

[0027] The adjusting rod 22 is slidably connected in a groove on the surface of the support plate 1. The connecting frame 23 is installed on the surface of the feeding hopper 21. The adjusting groove 24 is opened on the surface of the support plate 1, and the connecting frame 23 is slidably connected inside the adjusting groove 24. The first drive plate 25 is hinged to the upper surface of the connecting frame 23, and the second drive plate 26 is hinged to the upper surface of the first drive plate 25. The bracket 27 is installed on one side surface of the support plate 1, and the second drive plate 26 is rotatably connected to the bottom surface of the bracket 27. The feeding hopper 21, adjusting rod 22, connecting frame 23 and other components work together to break the structural limitations of the traditional fixed feeding hopper 21. The feeding hopper 21 can be moved by the driving components, avoiding the accumulation of materials in the hopper due to stickiness and hygroscopicity, reducing the risk of blockage from the source, and ensuring the continuity of material conveying.

[0028] A drive motor 28 is mounted on the upper surface of the bracket 27. The output end of the drive motor 28 passes through the bracket 27 and is connected to the drive plate 26. The drive motor 28 realizes the automatic control of the shaking of the feeding hopper 21 without the need for continuous intervention by the operator, reducing labor intensity. Moreover, the output speed of the drive motor 28 is stable. The swing frequency of the drive plate 26 can be precisely controlled by adjusting the motor parameters (such as the speed), thereby adjusting the shaking amplitude and frequency of the feeding hopper 21 to adapt to materials with different viscosity and particle size.

[0029] The surface of the support plate 1 is pre-drilled with threaded holes for threaded installation. The pre-drilled threaded holes can be directly fixed to the mounting position of the twin-screw extruder by bolts, eliminating the need for on-site drilling, shortening installation time, and reducing the difficulty of equipment assembly.

[0030] A flexible conveying pipe is installed at the discharge port of the feed hopper 21. The flexible conveying pipe has a certain degree of flexibility and can adapt to the shaking motion of the feed hopper 21.

[0031] The surface of the connecting frame 23 is equipped with an auxiliary limiting component 3. The auxiliary limiting component 3 includes a limiting plate 31 disposed on the outer side of the support plate 1 and a guide rod 32 slidably connected to the through hole on the surface of the connecting frame 23.

[0032] One end of the adjusting rod 22 passes through the support plate 1 and extends to the outside of the support plate 1, and is connected to the limiting plate 31. The limiting plate 31 cooperates with the guide rod 32 to provide precise limit for the movement of the feeding hopper 21, prevent the feeding hopper 21 from deviating or moving excessively when it shakes, and at the same time enhance the connection stability between the connecting frame 23 and the support plate 1, avoid the decrease in feeding accuracy caused by loose parts, and ensure the overall reliable operation of the mechanism.

[0033] Both ends of the guide rod 32 pass through the connecting frame 23 and are installed in the adjusting groove 24. The guide rod 32 provides a fixed trajectory for the sliding of the connecting frame 23 in the adjusting groove 24, preventing the connecting frame 23 from shifting laterally due to uneven force, ensuring that the connecting frame 23 drives the feeding hopper 21 to shake in a preset direction, and improving the stability of the anti-blocking effect.

[0034] Among them, the structure of the feeding hopper 21 and the drive motor 28 is existing technology, and its working principle is a well-known technology. The appropriate model is selected according to the actual use.

[0035] Working principle and process: The entire feeding mechanism is fixed to the corresponding installation position of the twin-screw extruder by bolts and other fasteners through the pre-set threaded holes on the surface of the support plate 1. This ensures the overall stability of the mechanism and avoids the impact of foundation shaking on feeding accuracy during operation. The material to be processed (such as granular or powdered polymer materials) is poured into the inside of the feeding hopper 21. At the same time, the flexible conveying pipe at the outlet of the feeding hopper 21 is checked to ensure that it is accurately connected to the feed inlet of the twin-screw extruder barrel without bending or leakage risk, thus creating a smooth channel for subsequent material conveying.

[0036] When the power supply to the drive motor 28 is turned on, the output end of the drive motor 28 begins to rotate (the output end passes through the bracket 27 and is connected to the second drive plate 26), causing the second drive plate 26 to swing in a circular motion around the rotation connection point between it and the bottom surface of the bracket 27. When the second drive plate 26 swings, it pulls the first drive plate 25 to reciprocate through its hinge point with the first drive plate 25. The lower part of the first drive plate 25 is hinged to the upper surface of the connecting frame 23, thereby causing the connecting frame 23 to slide horizontally back and forth along the guide rod 32 in the adjustment groove 24 on the surface of the support plate 1 (the two ends of the guide rod 32 are fixed in the adjustment groove 24 to limit the sliding direction of the connecting frame 23 and ensure stability). The connecting frame 23 is fixedly connected to the surface of the feeding hopper 21, and synchronously drives the feeding hopper 21 to swing horizontally back and forth. At the same time, the adjustment rods 22 at the four corners of the feeding hopper 21 slide synchronously with the feeding hopper 21 in the sliding groove of the support plate 1, further helping to limit the swing trajectory of the feeding hopper 21 and avoid deviation.

[0037] One end of the adjusting rod 22 extends through the support plate 1 to the outside and is fixedly connected to the limiting plate 31. When the feeding hopper 21 drives the adjusting rod 22 to slide to the end of the chute, the limiting plate 31 contacts the outer side of the support plate 1, blocking the adjusting rod 22 from continuing to slide, thereby limiting the maximum shaking amplitude of the feeding hopper 21 and preventing material splashing or component collision damage due to excessive shaking.

[0038] The reciprocating shaking of the feed hopper 21 continuously acts on the internal material, breaking up the agglomeration structure formed by the material due to its stickiness and hygroscopicity, and preventing the material from accumulating on the inner side of the hopper wall and at the junction of the hopper opening and the flexible conveying pipe; at the same time, the slight vibration generated by the shaking helps the material slide down the hopper wall, and combined with the material's own gravity, ensures that the material enters the flexible conveying pipe evenly and continuously.

[0039] The material, after being shaken by the feed hopper 21, is smoothly conveyed to the barrel of the twin-screw extruder through a flexible conveying pipe, providing a stable material supply for subsequent melting, mixing and extrusion processes, and solving the problem of material supply interruption or fluctuation caused by blockage in the traditional fixed feed hopper 21.

[0040] When the production task is completed or needs to be paused, turn off the drive motor 28. Drive plate 26, drive plate 25, connecting frame 23 and feed hopper 21 gradually stop shaking and return to their initial positions. Empty the remaining material in feed hopper 21 and clean the flexible conveying pipe and the inner wall of feed hopper 21 to prepare for the next use.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feeding mechanism for a twin-screw extruder, comprising a support plate (1); Its features are: The surface of the support plate (1) is equipped with a shaking anti-accumulation component (2). The shaking anti-accumulation component (2) includes a feeding hopper (21) disposed inside the support plate (1), four adjusting rods (22) respectively installed at the four corners of the feeding hopper (21), a connecting frame (23) for movement, an adjusting groove (24), a drive plate one (25), a drive plate two (26), and a bracket (27). The surface of the connecting frame (23) is equipped with an auxiliary limiting component (3), which includes a limiting plate (31) disposed on the outer side of the support plate (1) and a guide rod (32) slidably connected to a through hole in the surface of the connecting frame (23).

2. The feeding mechanism for a twin-screw extruder according to claim 1, characterized in that: The adjusting rod (22) is slidably connected in a groove on the surface of the support plate (1). The connecting frame (23) is installed on the surface of the feeding hopper (21). The adjusting groove (24) is opened on the surface of the support plate (1), and the connecting frame (23) is slidably connected inside the adjusting groove (24). The first drive plate (25) is hinged to the upper surface of the connecting frame (23). The second drive plate (26) is hinged to the upper surface of the first drive plate (25). The bracket (27) is installed on one side surface of the support plate (1), and the second drive plate (26) is rotatably connected to the bottom surface of the bracket (27).

3. The feeding mechanism for a twin-screw extruder according to claim 1, characterized in that: A drive motor (28) is mounted on the upper surface of the bracket (27). The output end of the drive motor (28) passes through the bracket (27) and is connected to the drive plate (26).

4. The feeding mechanism for a twin-screw extruder according to claim 1, characterized in that: The surface of the support plate (1) is pre-drilled with threaded holes for threaded installation.

5. The feeding mechanism for a twin-screw extruder according to claim 1, characterized in that: A flexible conveying pipe is installed at the discharge port of the feeding hopper (21).

6. The feeding mechanism for a twin-screw extruder according to claim 1, characterized in that: One end of the adjusting rod (22) passes through the support plate (1) and extends to the outside of the support plate (1), and is connected to the limiting plate (31).

7. The feeding mechanism for a twin-screw extruder according to claim 1, characterized in that: Both ends of the guide rod (32) pass through the connecting frame (23) and are installed in the adjusting groove (24).

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