Double-screw feeding device
The design of the twin-screw feeding device solves the problem of powdery materials easily clumping during the conveying process, achieving loose conveying of materials and stable operation of the equipment, and avoiding blockage and adhesion.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-04-03
AI Technical Summary
Existing screw feeding devices tend to compress powdery materials into lumps when conveying them, causing blockages at the feed inlet of the receiving equipment and affecting production and processing.
It adopts a twin-screw design, in which the screw groove width of the second feeding section is larger than that of the first feeding section. Combined with the staggered arrangement of stirring columns, cooling channels and anti-sticking layer, it prevents powdery materials from being squeezed into lumps and cleans blockages through air blowing holes.
It effectively prevents powdery materials from clumping during conveying, keeps the materials loose, facilitates subsequent production and processing, and prevents equipment adhesion through cooling and cleaning measures, ensuring stable equipment operation.
Smart Images
Figure CN224074940U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of extrusion equipment technology, specifically to a twin-screw feeding device. Background Technology
[0002] The main function of a feeding device is to continuously and uniformly feed processed or unprocessed materials from one piece of equipment to a receiving or conveying machine. Its working principle is that the rotation of the screw causes the material to move along the screw's helix towards the outlet. Because the screw's rotation speed is easily controlled, the material can maintain a constant conveying rate during the process, making production more automated. However, when conveying powdered materials, the screw can cause the powder to be compressed into lumps during transport, potentially blocking the receiving equipment's inlet upon discharge and thus affecting subsequent production. Utility Model Content
[0003] To overcome the shortcomings of the prior art, this utility model provides a twin-screw feeding device, which solves the problem that existing screws easily compress powdery materials into lumps.
[0004] The technical solution adopted in this utility model is as follows:
[0005] A twin-screw feeding device includes a feeding seat, wherein the feeding seat has a feeding channel and a discharging channel, and a screw is disposed in the feeding channel. The screw includes a rod body and further includes:
[0006] The first feeding section is located on the rod.
[0007] The second feeding section is set on the rod body and close to the discharge channel. The screw groove width of the second feeding section is greater than that of the first feeding section.
[0008] The mixing columns are evenly distributed circumferentially within the screw grooves of the second feeding section.
[0009] The stirring column consists of at least two sets, with the front and rear stirring columns arranged alternately.
[0010] Cooling channels are provided on both sides of the feeding seat.
[0011] The cooling channel is S-shaped.
[0012] The screw surface and the inner wall of the feed seat are both provided with an anti-sticking layer.
[0013] The feeding seat has an air blowing hole on one side for communicating with the feeding channel, and the air blowing hole is close to the feeding end of the feeding channel.
[0014] The beneficial effects of this utility model are:
[0015] When the powder enters the second feeding section from the first feeding section, the extrusion pressure on the powder decreases due to the increased width of the screw groove in the second feeding section. At the same time, the mixing column breaks up the lumpy powder, making it loose and easier for subsequent production and processing. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the present invention.
[0017] Figure 2 This is a schematic diagram of the cooling flow channel of the feed seat of this utility model.
[0018] 1. Feeding seat; 2. Discharge channel; 3. Rod body; 4. Feeding section 1; 5. Feeding section 2; 6. Stirring column; 7. Cooling channel; 8. Air blowing hole. Detailed Implementation
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0020] In the embodiments, such as Figure 1 As shown, a twin-screw feeding device includes a feeding seat 1, which has a feeding channel and a discharging channel 2. A screw is disposed within the feeding channel, and the screw includes a rod body 3. It also includes:
[0021] Feeding section 4 is located on rod 3;
[0022] The second feeding section 5 is set on the rod body 3 and close to the discharge channel 2. The screw groove width of the second feeding section 5 is greater than the screw groove width of the first feeding section 4.
[0023] The stirring column 6 is evenly distributed circumferentially within the screw groove of the second feeding section 5.
[0024] When the powder enters the second feeding section 5 from the first feeding section 4, the extrusion pressure on the powder decreases due to the increased width of the screw groove in the second feeding section 5. At the same time, the mixing column 6 breaks up the lumpy powder, making it loose and easier for subsequent production and processing.
[0025] In the embodiments, such as Figure 1 As shown, there are at least two sets of stirring columns 6, with the front and rear stirring columns 6 arranged alternately. The alternately arranged stirring columns 6 can better break up lumpy powder.
[0026] In the embodiments, such as Figure 2 As shown, cooling channels 7 are provided on both side walls of the feed seat 1. The cooling channels 7 can effectively reduce the temperature inside the feed seat 1, reduce the melting and adhesion of low-melting-point materials to the inner wall of the feed seat 1 and the screw surface, and reduce the impact on the operation of the screw.
[0027] In the embodiments, such as Figure 2As shown, the cooling channel 7 is S-shaped. The cooling area on both sides of the feed seat 1 is large, resulting in good cooling effect.
[0028] In this embodiment, both the surface of the screw and the inner wall of the feed seat 1 are provided with an anti-stick layer. The anti-stick layer can be a polytetrafluoroethylene coating, which not only prevents sticking but also has the advantages of wear resistance. Material will not adhere to the inner wall of the feed seat 1 or the surface of the screw, ensuring the cleanliness of the feed seat 1.
[0029] In the embodiments, such as Figure 1 As shown, one side of the feeding seat 1 is provided with an air blowing hole 8 for communicating with the feeding channel, and the air blowing hole 8 is close to the feed end of the feeding channel. The air blowing hole 8 is connected to an air blowing device for cleaning the feeding channel inside the feeding seat 1.
[0030] Obviously, the above embodiments of this utility model are merely illustrative examples and not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.
Claims
1. A twin-screw feeding device comprising a feeding seat (1) inside which a feeding channel and a discharge channel (2) are provided, the feeding channel being provided with a screw comprising a shaft (3), characterized in that, Also include: The first feeding section (4) is arranged on the rod body (3); The second feeding section (5) is arranged on the rod body (3) and close to the discharge channel (2), the screw groove width of the second feeding section (5) is greater than that of the first feeding section (4); The stirring column (6) is evenly distributed in the screw groove of the second feeding section (5).
2. A twin screw feeding device as claimed in claim 1, characterized in that: The stirring column (6) is at least two groups, and the front and rear stirring columns (6) are staggered.
3. A twin screw feeding device as claimed in claim 1, characterized in that: The two side walls of the feeding seat (1) are provided with cooling flow channels (7).
4. A twin-screw feeding device according to claim 3, characterized in that: The cooling flow channel (7) is S-shaped.
5. A twin screw feeding device as claimed in claim 1, characterized in that: The surface of the screw rod and the inner wall of the feeding seat (1) are provided with an anti-sticking layer.
6. A twin screw feeder as claimed in claim 1, wherein: One side of the feeding seat (1) is provided with a blowing hole (8) for communicating with the feeding channel, and the blowing hole (8) is close to the feeding end of the feeding channel.