A twin-screw extrusion granulator feeding device

Abstract

This application relates to the technical field of extrusion granulator equipment, and in particular to a feeding device for a twin-screw extrusion granulator. The device includes a hopper installed on a twin-screw extruder. The hopper comprises a conical upper hopper and a cylindrical lower hopper connected vertically. The lower end of the lower hopper is connected to the conveying pipe of the twin-screw extruder. At least two openings are protruding from the upper outer periphery of the upper hopper, each opening being detachably connected to a feeding pipe. A raised ring is formed on the outer periphery of each opening, and a groove is formed on the inner wall of the feeding pipe near the opening for the raised ring to be inserted. This solution significantly reduces equipment downtime and simplifies cleaning and maintenance procedures through the quick-disassembly design of the feeding pipe.

Description

Technical Field

[0001] This application relates to the field of extrusion granulator equipment technology, and in particular to a feeding device for a twin-screw extrusion granulator. Background Technology

[0002] Twin-screw extruders are highly efficient mixing and extrusion equipment widely used in polymer material processing, food manufacturing, and pharmaceutical production. Their core advantage lies in the synergistic effect of the twin screws, enabling strong shearing, uniform mixing, and stable extrusion of materials, making them particularly suitable for processing complex formulations or high-viscosity materials. As a key component of the twin-screw extruder, the feeding device is responsible for proportionally, continuously, and uniformly conveying raw materials into the extruder barrel; its performance directly affects the quality of the final product and production efficiency.

[0003] Traditional feeding devices often use a single inlet design, requiring multiple raw materials to be fed through the same inlet, which can easily lead to uneven mixing of materials. To address this issue, a Chinese patent discloses a feeding device with multiple independent feeding inlets, supporting the separate feeding of different materials.

[0004] Feeding devices require daily cleaning. In smaller factories, wiping is the primary method, involving using solvents or detergents to clean the inner walls of the feeding ports to remove material adhering to them. While multiple feeding ports facilitate the separate feeding of different materials, this also increases the complexity of cleaning. Each feeding port requires individual cleaning, especially when the material is sticky or prone to clumping. This significantly increases the workload, extends equipment downtime, and impacts production efficiency. Utility Model Content

[0005] In order to reduce the downtime required for cleaning while ensuring multiple feeding ports, this application provides a feeding device for a twin-screw extruder granulator.

[0006] The feeding device for a twin-screw extruder granulator provided in this application adopts the following technical solution:

[0007] A feeding device for a twin-screw extruder granulator includes a hopper installed on the twin-screw extruder. The hopper includes a conical upper hopper and a straight lower hopper connected vertically. The lower end of the lower hopper is connected to the conveying pipe of the twin-screw extruder.

[0008] The upper bucket body has at least two protruding openings on its outer periphery near the top. Each opening is detachably connected to a feeding pipe. A protruding ring is formed on the outer periphery of each opening. A groove is formed on the inner wall of the feeding pipe near the opening for the protruding ring to be embedded.

[0009] By adopting the above technical solution, while retaining multiple openings, the feeding pipe is set as a detachable connection. The embedded structure of the convex ring and the groove enables the rapid installation and disassembly of the feeding pipe. When cleaning is required, the old feeding pipe can be directly disassembled, rinsed separately, and a clean feeding pipe can be reinstalled to shorten equipment downtime and ensure production efficiency.

[0010] Optionally, the convex ring is formed by a combination of multiple circumferentially spaced convex strips, and the groove fits into the convex strips.

[0011] By adopting the above technical solution, multiple spaced protrusions work together to form a protruding ring, so that the protruding ring has both a plane and a curved surface, so as to achieve a limiting effect.

[0012] Optionally, it also includes a collar, which is fitted at the junction of the feed tube and the opening.

[0013] By adopting the above technical solution, and by adding a collar at the junction of the feeding pipe and the feeding port, the stability of the connection is enhanced, preventing the feeding pipe from loosening or falling off during operation, and further improving the operational stability and safety of the equipment.

[0014] Optionally, the collar includes two rotatably connected half-rings, with one end of the two half-rings rotatably connected and the other end of the two half-rings detachably connected.

[0015] By adopting the above technical solution, this design makes the collar easier to disassemble compared to a complete collar.

[0016] Optionally, a stirring rod is vertically arranged inside the hopper, a mixing fan blade is installed at the upper end of the stirring rod and the mixing fan blade is installed in the upper hopper body, and a spiral stirring blade is installed at the lower end of the stirring rod and the spiral stirring blade is installed in the lower hopper body.

[0017] By adopting the above technical solution, and by setting mixing fan blades in the upper bucket and spiral stirring blades in the lower bucket, the material is double-stirred in the hopper, ensuring that the material is fully mixed, improving the uniformity of the material and the quality of the product, and optimizing the material conveying efficiency.

[0018] In summary, the overall beneficial effects of this application are as follows: This solution utilizes the embedded structure of the convex ring and groove, as well as the stable connection of the collar, to achieve rapid installation and disassembly of the feeding pipe, significantly shortening equipment downtime and simplifying the cleaning and maintenance process; at the same time, the dual stirring mechanism inside the hopper ensures thorough mixing of materials, improving product quality and production efficiency; the overall design enhances the operational stability of the equipment while ensuring the functionality of multiple feeding ports. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the twin-screw extruder granulator of this application.

[0020] Figure 2 This is a schematic diagram of the internal structure of the twin-screw extruder granulator of this application.

[0021] Figure 3 This is a schematic diagram showing the connection between the opening and the feeding pipe.

[0022] Explanation of reference numerals in the attached drawings: 1. Hopper; 2. Upper hopper body; 3. Lower hopper body; 4. Opening; 41. Protruding ring; 5. Feeding pipe; 51. Groove; 6. Stirring rod; 61. Mixing fan blade; 62. Spiral stirring blade; 7. Collar ring; 71. Half ring; 72. Extension block; 73. Bolt. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0024] This application discloses a feeding device for a twin-screw extruder granulator. (Refer to...) Figure 1 and Figure 2 The feeding device for a twin-screw extruder granulator includes a hopper 1 installed on the twin-screw extruder. The hopper 1 comprises a conical upper hopper body 2 and a cylindrical lower hopper body 3 connected vertically. The lower end of the lower hopper body 3 is connected to the conveying pipe of the twin-screw extruder. The material mixed in the hopper 1 can enter the conveying pipe for further mixing. At least two openings 4 protrude from the upper outer periphery of the upper hopper body 2. This application uses two cylindrical openings 4 as an example. Each opening 4 is detachably fitted with a feeding pipe 5. A pipe cover can be installed on the upper end of the feeding pipe 5, or it can be connected to an automatic conveying pipeline.

[0025] A stirring rod 6 is vertically installed inside the hopper 1, and the stirring rod 6 is driven by a motor. A mixing blade 61 is installed at the upper end of the stirring rod 6, and the mixing blade 61 is installed inside the upper hopper body 2, fitting against the inner wall of the upper hopper body 2, forming a double-stage blade structure. When the stirring rod 6 starts to rotate, the mixing blade 61 rotates accordingly, generating a mixing effect, causing the material to mix and move downwards along the inner wall of the upper hopper body 2 into the lower hopper body 3. The rotation speed can be adaptively adjusted according to the characteristics of the material to ensure that materials of different viscosities are thoroughly mixed.

[0026] A spiral stirring blade 62 is installed at the lower end of the stirring rod 6. The spiral stirring blade 62 is installed inside the lower hopper 3 and fits against the inner wall of the lower hopper 3. The working principle of the spiral stirring blade 62 is similar to that of the mixing fan blade 61, but the shape is different, thereby achieving different shearing and mixing effects.

[0027] Reference Figure 3The outer circumference of the opening 4 is integrally formed with a convex ring 41, which is formed by a combination of multiple circumferentially spaced convex strips; the inner wall of the feeding tube 5 near the opening 4 is recessed with a groove 51 for the convex ring 41 to be embedded. The shape of the groove 51 matches the convex strips, so that when the feeding tube 5 is inserted into the opening 4, the convex strips fit into the groove 51.

[0028] A collar 7 is fitted around the outer circumference of the protruding ring 41. The collar 7 is fitted at the junction of the feeding pipe 5 and the opening 4 to lock the junction of the feeding pipe 5 and the opening 4, ensuring that the feeding pipe 5 will not loosen or fall off during operation and preventing material leakage from this point. The collar 7 includes two rotatably connected half-rings 71. One end of the two half-rings 71 is rotatably connected by a rotating shaft, and the other end of each half-ring 71 is provided with an extension block 72. The collar 7 is locked by simultaneously inserting bolts 73 into the two extension blocks 72.

[0029] The implementation principle of the feeding device for a twin-screw extruder granulator in this application embodiment is as follows: the main material and auxiliary material are fed into the feed pipes 5 respectively, so that the main material and auxiliary material are initially mixed by the mixing fan blades 61, and then enter the lower hopper 3. After being further stirred by the spiral stirring blades 62, they finally enter the conveying pipe.

[0030] After the equipment has been in operation for a period of time, operators can perform routine maintenance. The specific procedure involves pulling out bolt 73, removing the collar 7, and pulling out the feed pipe 5, then replacing and installing a new feed pipe 5. This design significantly reduces equipment downtime and improves production efficiency. Routine cleaning can be performed regularly, and after the equipment has been in operation for an extended period, a deep cleaning of the equipment's interior should be carried out as usual.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A feeding device for a twin-screw extruder granulator, characterized in that: Includes a hopper (1) installed on a twin-screw extruder, the hopper (1) including a conical upper hopper body (2) and a straight lower hopper body (3) connected vertically, the lower end of the lower hopper body (3) being connected to the conveying pipe of the twin-screw extruder; The upper bucket body (2) has at least two openings (4) protruding from the outer periphery of the upper end. Each opening (4) is detachably connected to a feeding pipe (5). A protruding ring (41) is formed on the outer periphery of the opening (4). A groove (51) is formed on the inner wall of the feeding pipe (5) near the opening (4) for the protruding ring (41) to be embedded.

2. The feeding device for a twin-screw extruder granulator according to claim 1, characterized in that: The convex ring (41) is formed by a combination of multiple circumferentially spaced convex strips, and the groove (51) fits the convex strips.

3. The feeding device for a twin-screw extruder granulator according to claim 1, characterized in that: It also includes a collar (7), which is fitted at the junction of the feeding pipe (5) and the opening (4).

4. The feeding device for a twin-screw extruder granulator according to claim 3, characterized in that: The collar (7) includes two rotatably connected half-rings (71), one end of the two half-rings (71) is rotatably connected, and the other end of the two half-rings (71) is detachably connected.

5. The feeding device for a twin-screw extruder granulator according to claim 1, characterized in that: A stirring rod (6) is vertically arranged inside the hopper (1). A mixing fan blade (61) is installed at the upper end of the stirring rod (6). The mixing fan blade (61) is installed inside the upper hopper body (2). A spiral stirring blade (62) is installed at the lower end of the stirring rod (6). The spiral stirring blade (62) is installed inside the lower hopper body (3).

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