Feeding mechanism of double-screw extruder

Abstract

The utility model belongs to the technical field of double-screw extruders, and discloses a feeding mechanism of a double-screw extruder, the feeding mechanism comprises a feeding pipe, a bolt is arranged on the outer side of the feeding pipe, scraping assemblies are arranged at the upper end and the interior of the feeding pipe, each scraping assembly comprises a top ring arranged at the upper end of the feeding pipe, and a top disc is arranged above the top ring; a vertical rod is fixedly connected to the lower end of the top disc, a scraping ring is fixedly connected to the lower end of the vertical rod, and a circular groove penetrates through the center of the upper end of the top disc; the top ring can be fixed to the upper end of the feeding pipe through cooperation of a clamping block and a bolt, the interior of a scraping ring can be closed through cooperation of a second fan-shaped piece and a first fan-shaped piece, and raw materials attached to the inner wall of the feeding pipe can be scraped off through movement of the scraping ring; the raw materials attached to the inner wall of the feeding pipe are scraped to the position below the feeding pipe through mutual cooperation of the second fan-shaped piece and the first fan-shaped piece, so that the situation that the scraped raw materials on the inner wall of the feeding pipe are attached again is avoided.

Description

Technical Field

[0001] This application relates to the field of twin-screw extruder technology, and more specifically, to a feeding mechanism for a twin-screw extruder. Background Technology

[0002] Twin-screw extruders were developed based on single-screw extruders. Twin-screw extruders mainly consist of several parts, such as a transmission device, a feeding device, a barrel, and a screw. Due to their good feeding performance, mixing and plasticizing performance, venting performance, and extrusion stability, they are now widely used in the molding and processing of extruded products.

[0003] Existing twin-screw extruders are not energy-efficient or environmentally friendly. The material in twin-screw extruders is fed through the feeding equipment, and some of the material may contain moisture, which makes it very easy for the material to adhere to the inner wall of the feeding equipment. If it is not removed, a lot of material will be wasted and production costs will increase.

[0004] To address the aforementioned problems, this application provides a feeding mechanism for a twin-screw extruder. Utility Model Content

[0005] The feeding mechanism of the twin-screw extruder provided in this application adopts the following technical solution:

[0006] A feeding mechanism for a twin-screw extruder includes a feed pipe with bolts on its outer side. A scraping assembly is provided at the upper end and inside of the feed pipe. A slot is evenly formed on the outer surface of the upper end of the feed pipe, and a threaded groove is formed on the inner wall of the slot. The scraping assembly includes a top ring at the upper end of the feed pipe, a top plate above the top ring, a vertical rod fixedly connected to the lower end of the top plate, and a scraper ring fixedly connected to the lower end of the vertical rod. A circular groove is formed through the center of the upper end of the top plate, and a rotating rod is formed through the interior of the circular groove.

[0007] Furthermore, an inner ring is fixedly connected to the inner wall of the top ring, and a locking block is evenly fixedly connected to the lower end of the top ring. A through groove is opened on one side of the locking block, and the locking block and the locking groove are slidably engaged. The through groove is connected to the threaded groove.

[0008] Through the above technical solution, the inner ring is used to limit the vertical rod and support and block the top plate, and the locking block is used to limit the top ring, that is, to limit it at the upper end of the feed pipe to prevent the top ring from rotating at the upper end of the feed pipe.

[0009] Furthermore, a first sector-shaped component is fixedly connected to the inner wall of the scraper ring, and a collar is fixedly connected to the inner wall of the first sector-shaped component. The outer surface of the scraper ring is attached to the inner wall of the feed pipe.

[0010] Through the above technical solution, the scraper ring is used to scrape off the raw materials attached to the inner wall of the feed pipe, and the first sector-shaped part facilitates the free passage of the raw materials.

[0011] Furthermore, a handle is fixedly connected to the upper end of the rotating rod, a first baffle and a second baffle are fixedly connected to the outer surface of the rotating rod, an auxiliary block is fixedly connected to the lower end of the rotating rod, and a second sector-shaped component is fixedly connected to the outer surface of the auxiliary block. The first baffle is located at the upper end of the top plate, the second baffle is located at the lower end of the top plate, the auxiliary block is attached to the lower end of the collar, and the second sector-shaped component is attached to the lower end of the first sector-shaped component.

[0012] Through the above technical solution, the cooperation of the first baffle and the second baffle is used to restrict the rotating rod in the circular groove, that is, to prevent the rotating rod from moving up and down. The cooperation of the second sector and the first sector can close the inner wall of the scraper ring to prevent the scraped raw material from falling back onto the inner wall of the feed pipe.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] This application can fix the top ring to the upper end of the feed pipe by the cooperation of the clip and the bolt. The cooperation between the second sector and the first sector can form a closure inside the scraper ring. The movement of the scraper ring can scrape off the raw material attached to the inner wall of the feed pipe. The cooperation between the second sector and the first sector can scrape all the raw material attached to the inner wall of the feed pipe to the bottom of the feed pipe, so as to prevent the raw material scraped off the inner wall of the feed pipe from re-attaching. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this application;

[0016] Figure 2 This is a schematic diagram of the feed pipe structure of this application;

[0017] Figure 3 This is a schematic diagram of the top plate, top ring, scraper ring, and vertical rod structure of this application;

[0018] Figure 4 This is a schematic diagram of the rotating rod structure of this application.

[0019] Explanation of the labels in the diagram:

[0020] 1. Feed pipe; 11. Slot; 12. Threaded groove; 2. Bolt; 3. Scraping assembly; 31. Top plate; 311. Circular groove; 32. Top ring; 321. Inner ring; 322. Locking block; 3221. Through groove; 33. Scraper ring; 331. First sector-shaped component; 3311. Collar; 34. Rotating rod; 341. Handle plate; 342. First baffle; 343. Second baffle; 344. Auxiliary block; 3441. Second sector-shaped component; 35. Vertical rod. Detailed Implementation

[0021] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] Example:

[0025] This application discloses a feeding mechanism for a twin-screw extruder. Please refer to [link to relevant documentation]. Figures 1-4The feeding pipe 1 includes a feed tube 1, a bolt 2 on the outside of the feed tube 1, a scraping assembly 3 at the upper end and inside of the feed tube 1, a slot 11 evenly opened on the outer surface of the upper end of the feed tube 1, a threaded groove 12 opened on the inner wall of the slot 11, the scraping assembly 3 includes a top ring 32 at the upper end of the feed tube 1, a top plate 31 above the top ring 32, a vertical rod 35 fixedly connected to the lower end of the top plate 31, a scraping ring 33 fixedly connected to the lower end of the vertical rod 35, a circular groove 311 penetrating through the center of the upper end of the top plate 31, and a rotating rod 34 penetrating through the inside of the circular groove 311.

[0026] An inner ring 321 is fixedly connected to the inner wall of the top ring 32, and a locking block 322 is evenly fixedly connected to the lower end of the top ring 32. A through groove 3221 is provided on one side of the locking block 322. The locking block 322 and the locking groove 11 are slidably engaged and connected. The through groove 3221 is connected to the threaded groove 12.

[0027] The inner ring 321 is used to limit the vertical rod 35 and to support and block the top plate 31. The locking block 322 is used to limit the top ring 32, that is, to limit it at the upper end of the feed pipe 1 to prevent the top ring 32 from rotating at the upper end of the feed pipe 1.

[0028] A first sector-shaped component 331 is fixedly connected to the inner wall of the scraper ring 33, and a collar 3311 is fixedly connected to the inner wall of the first sector-shaped component 331. The outer surface of the scraper ring 33 is attached to the inner wall of the feed pipe 1.

[0029] The scraper ring 33 is used to scrape off the raw materials attached to the inner wall of the feed pipe 1, and the first sector 331 facilitates the free passage of the raw materials.

[0030] A handle plate 341 is fixedly connected to the upper end of the rotating rod 34. A first baffle 342 and a second baffle 343 are fixedly connected to the outer surface of the rotating rod 34. An auxiliary block 344 is fixedly connected to the lower end of the rotating rod 34. A second sector 3441 is fixedly connected to the outer surface of the auxiliary block 344. The first baffle 342 is located at the upper end of the top plate 31, and the second baffle 343 is located at the lower end of the top plate 31. The auxiliary block 344 is attached to the lower end of the collar 3311, and the second sector 3441 is attached to the lower end of the first sector 331.

[0031] The cooperation of the first baffle 342 and the second baffle 343 is used to restrict the rotating rod 34 in the circular groove 311, that is, to prevent the rotating rod 34 from moving up and down. The cooperation of the second sector 3441 and the first sector 331 can close the inner wall of the scraper ring 33 to prevent the scraped raw material from falling back onto the inner wall of the feed pipe 1.

[0032] The implementation principle of this embodiment is as follows: When it is necessary to scrape off the raw material attached to the inner wall of the feed pipe 1, firstly, the top ring 32 is placed at the upper end of the feed pipe 1, and the locking block 322 and the locking groove 11 are engaged. Under the action of the bolt 2, the locking block 322 is prevented from disengaging from the locking groove 11. Then, the handle disc 341 can be rotated so that the second sector 3441 rotates to a state completely offset from the first sector 331. At this time, the second sector 3441 and the first sector 331 form a complete closure inside the scraping ring 33. Then, the handle disc 341 can be pushed down. Under the action of the first baffle 342 and the second baffle 343, the top plate 31 can be pushed down synchronously. Under the action of the vertical rod 35, the scraper ring 33 can be pushed to move against the inner wall of the feed pipe 1. As the scraper ring 33 moves down, the raw material attached to the inner wall of the feed pipe 1 will be scraped off. Due to the presence of the first baffle 342 and the second baffle 343, the scraped raw material will not move through the inside of the scraper ring 33 to the top of the scraper ring 33. Thus, the raw material attached to the inner wall of the feed pipe 1 is scraped to the bottom of the feed pipe 1 to prevent the scraped raw material from re-attaching to the inner wall of the feed pipe 1.

[0033] 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 mechanism for a twin-screw extruder, comprising a feed pipe (1), wherein bolts (2) are provided on the outer side of the feed pipe (1), characterized in that: The upper end and interior of the feed pipe (1) are provided with a scraping component (3). The upper outer surface of the feed pipe (1) is uniformly provided with a slot (11). The inner wall of the slot (11) is provided with a threaded groove (12). The scraping component (3) includes a top ring (32) provided at the upper end of the feed pipe (1). A top plate (31) is provided above the top ring (32). A vertical rod (35) is fixedly connected to the lower end of the top plate (31). A scraping ring (33) is fixedly connected to the lower end of the vertical rod (35). A circular groove (311) is provided through the center of the upper end of the top plate (31). A rotating rod (34) is provided through the interior of the circular groove (311).

2. The feeding mechanism of a twin-screw extruder according to claim 1, characterized in that: An inner ring (321) is fixedly connected to the inner wall of the top ring (32), and a locking block (322) is evenly fixedly connected to the lower end of the top ring (32). A through groove (3221) is provided on one side of the locking block (322).

3. The feeding mechanism of a twin-screw extruder according to claim 2, characterized in that: The card block (322) is slidably engaged with the card slot (11), and the through slot (3221) is connected to the threaded slot (12).

4. The feeding mechanism of a twin-screw extruder according to claim 1, characterized in that: The inner wall of the scraper ring (33) is fixedly connected to a first sector-shaped component (331), and the inner wall of the first sector-shaped component (331) is fixedly connected to a collar (3311). The outer surface of the scraper ring (33) is attached to the inner wall of the feed pipe (1).

5. The feeding mechanism of a twin-screw extruder according to claim 1, characterized in that: The upper end of the rotating rod (34) is fixedly connected to a handle plate (341), and the outer surface of the rotating rod (34) is fixedly connected to a first baffle plate (342) and a second baffle plate (343). The lower end of the rotating rod (34) is fixedly connected to an auxiliary block (344), and the outer surface of the auxiliary block (344) is fixedly connected to a second sector-shaped component (3441).

6. The feeding mechanism of a twin-screw extruder according to claim 5, characterized in that: The first baffle (342) is located at the upper end of the top plate (31), the second baffle (343) is located at the lower end of the top plate (31), the auxiliary block (344) is attached to the lower end of the collar (3311), and the second sector (3441) is attached to the lower end of the first sector (331).

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