Screw structure capable of mixing in multiple directions

Abstract

A screw rod structure capable of mixing in multiple directions comprises a rod body and a screw flight arranged on the rod body, the screw flight comprises a feeding section and a multi-direction mixing section, the multi-direction mixing section is formed by distributing N long-pitch screw flight strips at equal intervals, a spiral groove is formed between every two adjacent long-pitch screw flight strips, and the feeding section and the multi-direction mixing section are arranged in the spiral groove. Spiral grooves are formed in the surfaces of the long-pitch screw edge strips, the rotating direction of the spiral grooves is the same as that of the spiral grooves, the spiral distance of the spiral grooves is smaller than that of the spiral grooves, any long-pitch screw edge strip is cut into a plurality of rhombic block-shaped structures by the corresponding spiral grooves and spiral grooves, and the rhombic block-shaped structures are arranged on the surfaces of the long-pitch screw edge strips. N is a natural number greater than or equal to 6. The device has the advantages that the mixing efficiency is improved, so that the dependence on the length of the screw rod is greatly reduced, the screw rod forms short-distance high compression, and the equipment length can be greatly shortened for some high polymer raw materials and rubber raw materials.

Description

Technical Field

[0001] The invention relates to the technical field of mixing screws, in particular to a screw structure capable of multi-directional mixing. Background Art

[0002] There is a Chinese utility model patent with patent number CN202022321427.5 and the name of "A Mixing Head of a Single Screw Extruder" which discloses a mixing head of a single screw extruder, which includes a mixing head body, a mixing head body including a threaded column, a first mixing rod, a second mixing rod and a third mixing rod; the first mixing rod is circumferentially provided with a plurality of first feed slots and a plurality of first discharge slots; the third mixing rod is circumferentially provided with a plurality of second feed slots and a plurality of second discharge slots; the first feed slot and the first discharge slot are alternately arranged, and the second feed slot and the second discharge slot are alternately arranged; a first feed passage connecting the first feed slot and the first discharge slot is arranged between one side of the first feed slot and the adjacent first discharge slot, and a second feed passage connecting the second feed slot and the second discharge slot is arranged between one side of the second feed slot and the adjacent second discharge slot; a first stopper is arranged at the bottom of the first feed passage and near both ends; a second stopper is arranged at the bottom of the second feed passage and near both ends. This application has the effect of improving plasticization uniformity. However, the multi-directional mixing effect of the mixing head still has room for improvement, so the structure of the mixing head needs to be further improved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a screw structure capable of multi-directional mixing, which can effectively shorten the screw length while maintaining the mixing effect, in view of the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: an instinctive multi-directional mixing screw structure, including a rod body and a screw rib arranged on the rod body, characterized in that: the screw rib includes a feeding section and a multi-directional mixing section, the multi-directional mixing section is composed of N long-pitch screw ribs distributed at equal intervals, and spiral grooves are formed between adjacent long-pitch screw ribs. A spiral groove is arranged on the surface of the long-pitch screw rib, the rotation direction of the spiral groove is the same as the rotation direction of the spiral groove, the spiral pitch of the spiral groove is smaller than the spiral pitch of the spiral groove, and any long-pitch screw rib is cut into a plurality of rhombus block structures by the corresponding spiral groove and the spiral groove, and N is a natural number greater than or equal to 6.

[0005] As an improvement, the four side walls of the block structure are arc-shaped surfaces.

[0006] As an improvement, the pitch of the long-pitch screw rib is greater than 80 cm.

[0007] As an improvement, there are 8 long pitch screw ribs in total, and the 8 long pitch screw ribs are grouped into 4, and the ends of a group of long pitch screw ribs are arranged along a spiral line, and the spiral direction of the spiral line is opposite to the spiral direction of the spiral groove.

[0008] As an improvement, the feed section is a multi-screw high-thrust conveying structure, which improves the material conveying efficiency and avoids material blockage in the feed section.

[0009] As a further improvement, the feed section has four screw fins, and the screw fin spacing of the four screw fins is greater than 60 cm.

[0010] As a further improvement, the ends of the four-screw ribs are aligned with the ends of the corresponding long-pitch screw ribs.

[0011] As an improvement, the spiral groove is a through groove that penetrates to the surface of the rod body.

[0012] As a further improvement, the spiral groove is also a through groove that penetrates the surface of the rod body.

[0013] As an improvement, the ratio of the length of the rod body section with screw ribs to the length of the rod body section without screw ribs is greater than or equal to 2, and the end surface of the long-pitch screw rib strip is an arc-shaped inclined surface adapted to the conical surface of the conical head of the rod body.

[0014] Compared with the prior art, the advantages of the present invention are: the multi-directional mixing section is composed of N long-pitch screw ribs distributed at equal intervals, and spiral grooves are formed between adjacent long-pitch screw ribs. A spiral groove is arranged on the surface of the long-pitch screw rib, and the rotation direction of the spiral groove is the same as the rotation direction of the spiral groove. The spiral pitch of the spiral groove is smaller than the spiral pitch of the spiral groove. Any long-pitch screw rib is cut into a plurality of diamond-shaped block structures by the corresponding spiral grooves and spiral grooves. This structure enables the material entering the multi-directional mixing section to rotate and move along the spiral grooves and spiral grooves, thereby realizing multi-directional displacement of the material, so that the material receives more shearing and extrusion at the same length compared with the prior art, thereby improving the mixing efficiency, thereby greatly reducing the dependence on the screw length, and enabling the screw to form a short-distance high compression, which can greatly shorten the equipment length for some polymer raw materials and rubber raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of an embodiment of the present invention;

[0016] Figure 2 for Figure 1 Front projection of

[0017] Figure 3 yes Figure 2 Sectional view along line AA;

[0018] Figure 4 yes Figure 1 Enlarged view of part I. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below with reference to the accompanying drawings.

[0020] like Figures 1 to 4 As shown, the screw structure capable of multi-directional mixing in this embodiment includes a rod body 1 and screw ribs arranged on the rod body 1, the screw ribs include a feed section A and a multi-directional mixing section B, the multi-directional mixing section A is composed of N long-pitch screw ribs distributed at equal intervals, and spiral grooves 11 are formed between adjacent long-pitch screw ribs. A spiral groove 12 is arranged on the surface of the long-pitch screw rib, and the rotation direction of the spiral groove 12 is the same as that of the spiral groove 11. The spiral pitch of the spiral groove 12 is smaller than the spiral pitch of the spiral groove 11. Any long-pitch screw rib is cut into a plurality of diamond-shaped block structures 13 by the corresponding spiral grooves and spiral grooves, and N is a natural number greater than or equal to 6. The four side walls of the block structure 13 are arc-shaped surfaces. The pitch of the long-pitch screw rib is greater than 80cm.

[0021] There are 8 long pitch screw ribs in total. The 8 long pitch screw ribs are grouped into 4. The ends of a group of long pitch screw ribs are arranged along a spiral line S. The spiral direction of the spiral line S is opposite to the spiral direction of the spiral groove 11.

[0022] The feed section A is a multi-spiral strong thrust conveying structure. The feed section A has four spirals, and the spiral pitch of the four spirals is greater than 60 cm. The ends of the spirals of the four spirals are aligned with the ends of the corresponding long-pitch spirals. The spiral groove 11 is a through groove that penetrates the surface of the rod body. The spiral groove 12 is also a through groove that penetrates the surface of the rod body.

[0023] The ratio of the length of the rod body section with screw ribs to the length of the rod body section without screw ribs is greater than or equal to 2, and the end surface of the long-pitch screw rib strip is an arc-shaped inclined surface adapted to the conical surface of the rod body conical head 14.

Claims

1. A screw structure capable of multi-directional mixing, comprising a rod body (1) and screw fins arranged on the rod body (1), characterized in that: The screw ribs include a feeding section (A) and a multi-directional mixing section (B), wherein the multi-directional mixing section (A) is formed by N long-pitch screw ribs distributed at equal intervals, and spiral grooves (11) are formed between adjacent long-pitch screw ribs. A spiral groove (12) is arranged on the surface of the long-pitch screw ribs, and the rotation direction of the spiral groove (12) is the same as that of the spiral groove (11). The spiral pitch of the spiral groove (12) is smaller than the spiral pitch of the spiral groove (11), and any long-pitch screw rib is cut into a plurality of rhombus-shaped block structures (13) by the corresponding spiral grooves and spiral grooves, and N is a natural number greater than or equal to 6.

2. The screw structure according to claim 1, characterized in that: The four side walls of the block structure (13) are arc-shaped surfaces.

3. The screw structure according to claim 1, characterized in that: The pitch of the long-pitch screw rib is greater than 80 cm.

4. The screw structure according to any one of claims 1 to 3, characterized in that: There are a total of eight long-pitch screw ribs, and the eight long-pitch screw ribs are grouped in groups of four. The ends of a group of long-pitch screw ribs are arranged along a spiral line (S), and the spiral direction of the spiral line (S) is opposite to the spiral direction of the spiral groove (11).

5. The screw structure according to claim 4, characterized in that: The feed section (A) is a multi-screw high-thrust conveying structure.

6. The screw structure according to claim 5, characterized in that: The feed section (A) has four screw flights, and the screw flight spacing of the four screw flights is greater than 60 cm.

7. The screw structure according to claim 6, characterized in that: The ends of the four-flight screw ribs are aligned with the ends of the corresponding long-pitch screw ribs.

8. The screw structure according to any one of claims 1 to 3, characterized in that: The spiral groove (11) is a through groove that penetrates the surface of the rod body.

9. The screw structure according to claim 8, characterized in that: The spiral groove (12) is also a through groove that penetrates the surface of the rod body.

10. The screw structure according to any one of claims 1 to 3, characterized in that: The ratio of the length of the rod body section with screw ribs to the length of the rod body section without screw ribs is greater than or equal to 2, and the end surface of the long-pitch screw rib strip is an arc-shaped inclined surface adapted to the conical surface of the rod body conical head (14).

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