CN219153683U

CN219153683U - Extrusion screw for double-screw extruder

Info

Publication number: CN219153683U
Application number: CN202222543697.XU
Authority: CN
Inventors: 夏梦卿; 夏印平; 夏龙辉
Original assignee: Huizhou Shuangsai Electronic Technology Co ltd
Current assignee: Huizhou Shuangsai Electronic Technology Co ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2023-06-09
Anticipated expiration: 2032-09-26

Abstract

The utility model discloses an extrusion screw for a double-screw extruder, which relates to the technical field of extruder screws, and comprises a transmission shaft, wherein one end of the transmission shaft is integrally provided with a square neck, one side of the square neck is provided with a feeding section, one end of the feeding section, which is far away from the square neck, is provided with a shearing section, and the other end of the shearing section is provided with a meshing section; according to the utility model, the length ratio of the feeding section to the transmission shaft is 4:6, so that the extruder has a large material conveying ratio, and the conveying efficiency of materials is improved; the side of the spiral feeding sheet facing the shearing section is perpendicular to the outer surface of the transmission shaft, so that the residues and caking of materials can be reduced, and the situation of reversing can not occur when the materials are propelled; the output of the traditional extrusion screw is 360kg/h, and the extrusion output of the screw provided by the utility model is 440-460kg/h; compared with the traditional screw rod, the production efficiency is improved by 1/5.

Description

Extrusion screw for double-screw extruder

Technical Field

The utility model particularly relates to the technical field of extruder screws, in particular to an extrusion screw for a double-screw extruder.

Background

In the plastic extrusion molding equipment, the plastic extruder is generally called a host machine, and the plastic extrusion molding machine of the subsequent equipment matched with the host machine is called an auxiliary machine. Through the development of over 100 years, the plastic extruder has been derived from the original single screw into multiple types such as double screws, multiple screws, even no screws and the like. The plastic extruder (main machine) can be matched with various plastic molding auxiliary machines such as pipes, films, rod materials, monofilaments, flat wires, packing belts, extruding nets, plates (sheets), special-shaped materials, pelleting, cable coating and the like to form various plastic extrusion molding production lines and produce various plastic products. Therefore, plastic extrusion molding machines are one of the widely used types in the plastic processing industry, whether now or in the future.

Chinese patent application number 201920570848.6 discloses a high-efficient screw rod that extrudes, including feeding section, plasticizing section and compounding section, the feeding section includes two spiral shell arris sections and single spiral shell arris section, and single spiral shell arris section is connected with the plasticizing section, and the plasticizing section includes crisscross main spiral shell arris and vice spiral shell arris, and the pole footpath between main spiral shell arris and the vice spiral shell arris is less than the body of rod footpath of extruding the screw rod.

The existing extruder screw is provided with a feeding section, a plasticizing section and a mixing section, but is made of screw sheets, and the screw pitch is changed, but compared with an extrusion rod with full screw sheets, the extrusion efficiency is not greatly improved, the screw sheets and a transmission shaft on the extrusion rod are designed in a mode of arc angle transition, after long-time use, materials are easy to remain on the screw sheets, and the materials are easy to solidify on the screw; therefore, the application provides an extrusion screw for a double-screw extruder, the pushing surface of a spiral sheet on the screw is perpendicular to a transmission shaft, the residue of materials is reduced, the extrusion screw has good material pushing performance, and the extrusion efficiency of the materials is improved.

Disclosure of Invention

The utility model aims to provide an extrusion screw for a double-screw extruder, which solves the technical problems that the prior extruder screw provided in the prior art is provided with a feeding section, a plasticizing section and a mixing section, but is made of screw sheets, and only the screw pitch is changed, but compared with an extrusion rod with full screw sheets, the extrusion efficiency is not greatly improved, the screw sheets and a transmission shaft on the extrusion rod are designed in a mode of excessive arc angles, and after long-time use, materials are easy to remain on the screw sheets and the materials are easy to solidify on the screw.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the extrusion screw for the double-screw extruder comprises a transmission shaft, wherein one end of the transmission shaft is integrally provided with a square neck, one side of the square neck is provided with a feeding section, one end of the feeding section, which is far away from the square neck, is provided with a shearing section, and the other end of the shearing section is provided with a meshing section;

the feeding section is a spiral feeding piece spirally arranged outside the transmission shaft, the spiral feeding piece is welded with the transmission shaft, one side of the spiral feeding piece facing the square neck is in arc-shaped arrangement, and one side of the spiral feeding piece facing the shearing section is perpendicular to the outer surface of the transmission shaft.

As a further technical scheme of the utility model, the length ratio of the feeding section to the transmission shaft is 4:6.

As a further technical scheme of the utility model, the shearing section comprises a plurality of shearing blocks which are arranged in an X-shaped staggered manner, and the shearing blocks are welded and fixed with the transmission shaft.

As a further technical scheme of the utility model, the length ratio of the shearing section to the transmission shaft is 3:7.

as a further technical scheme of the utility model, a plurality of shearing blocks are arranged, but not more than 50 shearing blocks are arranged.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the length ratio of the feeding section to the transmission shaft is 4:6, so that the extruder has a large material conveying ratio, and the conveying efficiency of materials is improved; the side (i.e. the pushing surface) of the spiral feeding sheet facing the shearing section is perpendicular to the outer surface of the transmission shaft, so that the residues and caking of materials can be reduced, and the situation of reversing can not occur when the materials are pushed; the output of the traditional extrusion screw is 360kg/h, and the extrusion output of the screw provided by the utility model is 440-460kg/h; compared with the traditional screw rod, the production efficiency is improved by 1/5;

2. according to the utility model, the length ratio of the shearing section to the transmission shaft is 3:7, and the shearing section includes a plurality of shearing pieces, and a plurality of shearing pieces are X form staggered arrangement, can cut the material after the plasticization, carry out abundant mixing with the incomplete powder granule of plasticization and the material of complete plasticization, have improved the homogeneity of material.

Drawings

Fig. 1 is a schematic perspective view of the present utility model.

Fig. 2 is a rear view of fig. 1 in the present utility model.

Fig. 3 is a schematic plan view of the structure of fig. 1 in the present utility model.

Fig. 4 is an enlarged partial schematic view of fig. 2 in accordance with the present utility model.

In the figure: 1-transmission shaft, 2-square neck, 3-feeding section, 4-shearing section and 5-meshing section.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, in an embodiment of the present utility model, an extrusion screw for a twin-screw extruder includes a transmission shaft 1, one end of the transmission shaft 1 is integrally provided with a square neck 2, one side of the square neck 2 is provided with a feeding section 3, one end of the feeding section 3 far from the square neck 2 is provided with a shearing section 4, and the other end of the shearing section 4 is provided with a meshing section 5;

the length ratio of the feeding section 3 to the transmission shaft 1 is 4:6, the feeding section 3 is a spiral feeding sheet spirally arranged outside the transmission shaft 1, the spiral feeding sheet is welded with the transmission shaft 1, one side of the spiral feeding sheet facing the square neck 2 is in arc-shaped arrangement, and one side of the spiral feeding sheet facing the shearing section 4 is perpendicular to the outer surface of the transmission shaft 1.

By adopting the technical scheme, the length ratio of the feeding section 3 to the transmission shaft 1 is 4:6, so that the extruder has a larger material conveying ratio, and the conveying efficiency of materials is improved; the side of the spiral feeding sheet facing the shearing section 4, namely the propelling surface, is perpendicular to the outer surface of the transmission shaft 1, so that the residues and caking of materials can be reduced, and the situation of reversing can not occur when the materials are propelled; the output of the traditional extrusion screw is 360kg/h, and the extrusion output of the screw provided by the utility model is 440-460kg/h; compared with the traditional screw rod, the production efficiency is improved by 1/5.

In this embodiment, the length ratio of the shear section 4 to the transmission shaft 1 is 3:7, the shearing blocks are provided with a plurality of but not more than 50, the shearing section 4 comprises a plurality of shearing blocks, the shearing blocks are arranged in an X-shaped staggered mode, and the shearing blocks are welded and fixed with the transmission shaft 1.

Through adopting above-mentioned technical scheme, can cut the material after the plasticization, carry out abundant mixing with the incomplete powder granule of plasticization and the material of complete plasticization, improve the homogeneity of material.

The working principle of the utility model is as follows: the screw is mainly used for a double-screw extruder for medium-temperature materials and low-temperature materials, two identical extrusion rods are arranged in the double-screw extruder for use, and when the double-screw extruder is used, the length ratio of the extrusion feeding section 3 to the transmission shaft 1 is 4:6, so that the extruder has a larger material conveying ratio, and the conveying efficiency of the materials is improved; the side (i.e. the pushing surface) of the spiral feeding sheet facing the shearing section 4 is perpendicular to the outer surface of the transmission shaft 1, so that the residue and agglomeration of materials can be reduced, and the situation of reversing can not occur when the materials are pushed; the output of the traditional extrusion screw is 360kg/h, and the extrusion output of the screw provided by the utility model is 440-460kg/h; compared with the traditional screw rod, the production efficiency is improved by 1/5;

the length ratio of the shearing section 4 to the transmission shaft 1 is 3:7, and shearing section 4 includes a plurality of shearing pieces, and a plurality of shearing pieces are X form staggered arrangement, can cut the material after the plasticization, carries out abundant mixing with the incomplete powder granule of plasticization and the material of complete plasticization, has improved the homogeneity of material.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. An extrusion screw for a twin-screw extruder, characterized in that: the automatic feeding device comprises a transmission shaft (1), wherein one end of the transmission shaft (1) is integrally provided with a square neck (2), one side of the square neck (2) is provided with a feeding section (3), one end, far away from the square neck (2), of the feeding section (3) is provided with a shearing section (4), and the other end of the shearing section (4) is provided with a meshing section (5);

the feeding section (3) is a spiral feeding sheet spirally arranged outside the transmission shaft (1), the spiral feeding sheet is welded with the transmission shaft (1), one side of the spiral feeding sheet facing the square neck (2) is in an arc-shaped arrangement, and one side of the spiral feeding sheet facing the shearing section (4) is perpendicular to the outer surface of the transmission shaft (1).

2. The extrusion screw for a twin-screw extruder according to claim 1, wherein: the length ratio of the feeding section (3) to the transmission shaft (1) is 4:6.

3. The extrusion screw for a twin-screw extruder according to claim 1, wherein: the shearing section (4) comprises a plurality of shearing blocks which are arranged in an X-shaped staggered mode, and the shearing blocks are welded and fixed with the transmission shaft (1).

4. The extrusion screw for a twin-screw extruder according to claim 1, wherein: the length ratio of the shearing section (4) to the transmission shaft (1) is 3:7.

5. the extrusion screw for a twin-screw extruder according to claim 3, wherein: the number of the shearing blocks is more than 50.