CN214872455U

CN214872455U - Extrusion screw

Info

Publication number: CN214872455U
Application number: CN202121066028.7U
Authority: CN
Inventors: 袁能军
Original assignee: Zhejiang Dongbin Rubber Screw Co ltd
Current assignee: Zhejiang Dongbin Rubber Screw Co ltd
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2021-11-26
Anticipated expiration: 2031-05-17

Abstract

The utility model provides an extrude screw rod, includes the body of rod and sets up the spiral shell arris on the body of rod, and the spiral shell arris divide into feed zone, melting section and ejection of compact section, and feed zone spiral shell arris is two spiral shell arriss, and feed zone spiral shell arris is including the first spiral shell arris and the second spiral shell arris that the interval set up, and the axial cross section of second spiral shell arris can cut the material and improve the triangle-shaped structure of material flow effect, and melting section spiral shell arris is broken in proper order and the spiral shell arris strip that the mutual interval set up is constituteed by the N section. The utility model has the advantages that: when materials with poor fluidity such as rubber and the like are processed, the materials can still be effectively cut, the materials are pushed to flow forwards, the feeding of the materials is smooth, and the blockage of the materials at a feeding section is effectively avoided; the spiral shell arris strip that the interval set up had both increased the dwell time of material in the melting section, fully extruded the bubble, had increased the spiral shell arris terminal surface again and to getting into the pushing action of melting section material, at the flow track that changes the material, realized the multi-direction stirring and the stirring many times of material, further improved and extruded the effect.

Description

Extrusion screw

Technical Field

The utility model relates to a screw rod preparation technical field especially indicates an extrude screw rod.

Background

The present chinese utility model patent with a patent number CN201120358425.1 entitled "a screw rod for in injection molding machine" discloses a screw rod for in injection molding machine, including the body of rod, this body of rod comprises reinforced section, melting section, homogenization section, extrusion section in proper order reinforced section, melting section, homogenization section, extrusion section are last to be provided with spiral arris, its characterized in that respectively: the spiral rib comprises a first spiral rib section, a second spiral rib section and a third spiral rib section, the spiral rib of the second spiral rib section is double spiral ribs, and the distance between the double spiral ribs is 2-2.5 mm. The utility model has the advantages that: the screw homogenizing section is provided with double screw ridges, each double screw ridge comprises two complete screw ridges which are connected with each other, and the structure can enable materials to be heated uniformly when a screw machine barrel operates, so that the sol speed is increased, the materials are not easy to burn, and therefore, the extruded materials have no black spots. However, if the screw is used for rubber processing, the feeding section is easy to block, the use effect is not ideal, and therefore the structure of the screw needs to be further improved.

Disclosure of Invention

The utility model aims to solve the technical problem that it is smooth and easy to provide a material feeding to above-mentioned prior art current situation, can avoid feeding department to block up, extrude the screw rod of extruding of effect ideal.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: this extrusion screw, including the body of rod and the spiral shell arris of setting on the body of rod, the spiral shell arris divide into feed zone, melting section and ejection of compact section, its characterized in that: the feeding section spiral shell arris is two spiral arriss, the feeding section spiral shell arris is including first spiral arris and the second spiral arris that the interval set up, and the axial cross-section of second spiral arris can cut the material and improve the triangle-shaped structure of material flow effect, and melting section spiral arris is broken in proper order by the N section and the spiral arris strip that sets up at mutual interval forms, N is the natural number that is greater than 1.

As a refinement, the distance between the first and second ridges of the respective spiral section increases gradually.

In a further improvement, the axial section of the first screw ridge is rectangular.

In a further improvement, the root width of the axial section of the second screw flight is greater than the width of the axial section of the first screw flight.

As a modification, the outer vertex angles of the second spiral ridges are all located in the spiral concave cavities corresponding to the first spiral ridges.

As an improvement, the spiral rib is a single-circle spiral rib.

The improvement is further that the overlooking projection of the single-circle spiral rib forms a complete circle, and a rod body section without a spiral rib with a smooth surface is arranged between the end parts of the adjacent single-circle spiral rib.

The further improvement is that the end face of the spiral rib close to the discharging section in each single circle of spiral ribs is a plane.

The improved spiral edge strip structure is further improved, the end parts of adjacent single-circle spiral edge strips are arranged in a staggered mode, and the end faces of the spiral edge strips, close to the discharging section, of the N sections are located on the same spiral line.

The further improvement is that the tail end of the single-circle spiral rib at the tail end of the melting section and the head end of the spiral rib of the discharging section are arranged in a staggered way.

Compared with the prior art, the utility model has the advantages of: the double-screw-edge screw is arranged at the feeding section, and the axial section of the second screw-edge is of a triangular structure which can cut materials and improve the flowing effect of the materials, so that when the screw is used for processing materials with poor flowability such as rubber and the like, the materials can still be effectively cut, the materials are pushed to flow forwards, the feeding of the materials is smooth, and the blockage of the materials at the feeding section is effectively avoided; the spiral shell arris that the melting section spiral shell arris adopted the interval to set up strip, had both increased the dwell time of material in the melting section, through the extrusion deformation of material self, fully extrude the bubble and realize material melting deformation, increased the promotion effect of spiral shell arris terminal surface to getting into the melting section material again, at the flow track that changes the material, realized the multi-direction stirring and the stirring many times of material, further improved and extruded the effect.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a cross-sectional view taken along line D-D of FIG. 2;

FIG. 4 is an enlarged view of portion I of FIG. 2;

fig. 5 is an enlarged view of a portion II in fig. 3.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 5, the extrusion screw of the present embodiment includes a rod body 1 and screw ridges disposed on the rod body 1, the screw ridges are divided into a feeding section a, a melting section B and a discharging section C, the feeding section screw ridges are double screw ridges, the feeding section screw ridges include first screw ridges 11 and second screw ridges 12 disposed at intervals, an axial cross section of the second screw ridges 12 is a triangular structure capable of cutting a material to improve a material flowing effect, the melting section screw ridges 13 are formed by screw ridge strips that are sequentially broken by N sections and disposed at intervals, and N is a natural number greater than 1. The distance between the first and

second ridges

11 and 12 of the corresponding spiral section gradually increases. The first screw flight 11 is rectangular in axial cross-section. The width of the root of the axial section of the second flight 12 is greater than the width of the axial section of the first flight 11. The outer corners of the second ridges 12 are each located in a helical recess 111 corresponding to the first ridge 11.

The spiral rib is a single-ring spiral rib. The overlooking projection of the single-circle spiral rib forms a complete circle, and a rod body section with a smooth surface and no spiral rib is arranged between the end parts of the adjacent single-circle spiral ribs. The end face 131 of the spiral rib close to the discharging section C in each single circle of spiral ribs is a plane. The ends of the adjacent single-circle spiral rib are arranged in a staggered mode, and the end faces 131, close to the discharging section C, of the spiral rib of the N section are located on the same spiral line. The tail end of the single-circle spiral rib positioned at the tail end of the melting section B and the head end of the spiral rib 14 of the discharging section are arranged in a staggered mode.

Claims

1. The utility model provides an extrusion screw, includes the body of rod (1) and sets up the spiral shell arris on the body of rod (1), the spiral shell arris divide into feeding section (A), melting section (B) and ejection of compact section (C), its characterized in that: the feed section spiral shell arris is two spiral arriss, the feed section spiral shell arris is including first spiral arris (11) and second spiral arris (12) that the interval set up, and the axial cross-section of second spiral arris (12) is the triangle-shaped structure that can cut the material and improve the material effect of flowing, and melting section spiral arris (13) are broken in proper order and the spiral arris strip that sets up at mutual interval by the N section is constituteed, N is the natural number that is greater than 1.

2. The extrusion screw of claim 1, wherein: the distance between the first and second ridges (11, 12) of the respective spiral sections increases.

3. The extrusion screw of claim 2, wherein: the axial section of the first screw edge (11) is rectangular.

4. The extrusion screw of claim 3, wherein: the width of the root of the axial section of the second screw ridge (12) is larger than that of the axial section of the first screw ridge (11).

5. An extrusion screw according to any one of claims 1 to 4, wherein: the external vertex angles of the second spiral ridges (12) are all positioned in the spiral concave cavities (111) corresponding to the first spiral ridges (11).

6. An extrusion screw according to any one of claims 1 to 4, wherein: the spiral rib is a single-ring spiral rib.

7. The extrusion screw of claim 6, wherein: the overlooking projection of the single-circle spiral rib forms a complete circle, and a rod body section with a smooth surface and no spiral rib is arranged between the end parts of the adjacent single-circle spiral ribs.

8. The extrusion screw of claim 7, wherein: the end surface (131) of the spiral rib close to the discharging section (C) in each single circle of spiral rib is a plane.

9. The extrusion screw of claim 8, wherein: the end parts of the adjacent single-circle spiral rib are arranged in a staggered mode, and the end surfaces (131) of the spiral rib, close to the discharging section (C), of the N sections are located on the same spiral line.

10. The extrusion screw of claim 9, wherein: the tail end of the single-circle spiral rib positioned at the tail end of the melting section (B) and the head end of the spiral rib (14) of the discharging section are arranged in a staggered mode.