阅读说明：本技术 螺杆及挤出机 (Screw and extruder ) 是由 苑乐伟 徐永浩 王争发 李清银 于 2020-07-20 设计创作，主要内容包括：本发明涉及一种螺杆及挤出机,螺杆具有与挤出机主体连接的连接部,以及沿螺杆的长度方向依次布置于连接部下游的喂料部、均化部和输送部,喂料部至少具有第一螺旋叶以及第一螺旋体,于第一螺旋体上构造有沿其延伸方向间隔设置的多个第一豁口；均化部具有第二螺旋叶,以及与第二螺旋叶间隔设置的第三螺旋也,第三螺旋叶由其一第二螺旋叶分支而成,并向输送部一侧延伸,且与前端第二螺旋叶连接；输送部至少具有第四螺旋叶以及第二螺旋体,于第二螺旋体上构造有沿其延伸方向间隔设置的多个第二豁口。本发明的螺杆可分割胶料,并改变胶料的混炼方式,从而可提高产品质量,也可改变胶料流向,并产生快速料流,进而能够提高本螺杆对胶料的输送能力。(The invention relates to a screw and an extruder, wherein the screw is provided with a connecting part connected with an extruder body, and a feeding part, a homogenizing part and a conveying part which are sequentially arranged at the downstream of the connecting part along the length direction of the screw, the feeding part is at least provided with a first spiral blade and a first spiral body, and a plurality of first gaps which are arranged at intervals along the extending direction of the first spiral body are constructed on the first spiral body; the homogenizing part is provided with a second spiral blade and a third spiral blade which is arranged at an interval with the second spiral blade, and the third spiral blade is formed by branching one second spiral blade, extends to one side of the conveying part and is connected with the second spiral blade at the front end; the conveying part is at least provided with a fourth spiral blade and a second spiral body, and a plurality of second openings which are arranged at intervals along the extending direction of the second spiral body are formed on the second spiral body. The screw rod can divide rubber materials and change the mixing mode of the rubber materials, so that the product quality can be improved, the flow direction of the rubber materials can be changed, quick material flow can be generated, and the conveying capacity of the screw rod on the rubber materials can be improved.)

1. A screw, characterized in that: the screw has a connecting part (A) for connecting with an external part, and a feeding part (B), a homogenizing part (C) and a conveying part (D) which are arranged at the downstream of the connecting part (A) in sequence along the length direction of the screw;

the feeding part (B) is at least provided with a first spiral blade (2) and a first spiral body (3) which is arranged at intervals with the first spiral blade (2) and spirally extends along the length direction of the spiral body, and a plurality of first openings which are arranged at intervals along the extending direction of the first spiral body (3) are constructed on the first spiral body (3);

the homogenizing part (C) is provided with a second spiral blade (4) and a third spiral blade (5) arranged at an interval with the second spiral blade (4), and the third spiral blade (5) is formed by branching one second spiral blade (4), extends to one side of the conveying part (D) and is connected with the adjacent second spiral blade (4) at the front end;

the conveying part (D) is at least provided with a fourth spiral blade (6) and a second spiral body (7) which is arranged at intervals with the fourth spiral blade (6) and spirally extends along the length direction of the spiral body, and a plurality of second gaps which are arranged at intervals along the extending direction of the second spiral body (7) are constructed on the second spiral body (7);

wherein the heights of the first spiral blade (2), the second spiral blade (4) and the fourth spiral blade (6) are consistent and are greater than the heights of the first spiral body (3), the third spiral blade (5) and the second spiral body (7).

2. The screw of claim 1, wherein: the lead angle of the first helical blade (2) is greater than the lead angle of the second helical blade (4).

3. The screw of claim 2, wherein: the lead angle of the fourth helical blade (6) is larger than that of the second helical blade (4).

4. The screw of claim 1, wherein: the thickness of the second spiral blade (4) is larger than that of the third spiral blade (5).

5. The screw of claim 1, wherein: the pitch of the third helical blade (5) is arranged to be gradually reduced in a direction approaching the conveying part (D).

6. The screw of claim 1, wherein: the first helical blade (2) and the fourth helical blade (6) have the same structure.

7. The screw of claim 1, wherein: the first spiral body (3) and the second spiral body (7) have the same structure.

8. The screw of claim 1, wherein: the connecting part (A) is provided with a flower-shaped key groove (1) connected with the extruder body.

9. The screw of any one of claims 1 to 8, wherein: the other end of the conveying part (D) is constructed in a hemispherical or conical shape with respect to the end where the conveying part (D) meets the homogenizing part (C).

10. An extruder including an extruder body having a driving source, characterized in that: the extruder body is provided with a screw according to any one of claims 1 to 9, and the connecting part (A) of the screw is in transmission connection with the power output end of the driving source.

Technical Field

The invention relates to the technical field of extruder parts, in particular to a screw, and simultaneously relates to an extruder with the screw.

Background

Screws are considered the "heart" of the plant, which has a significant impact on product quality, maximum throughput, and production efficiency. Because structural design is unreasonable, the screw rod among the prior art leads to product quality unstability, product appearance quality subalternation problem because mixing is inhomogeneous easily. In addition, due to different extrusion pressures, the size of the product is unstable, the consistency is poor, and the conveying capacity of the conventional screw is low, so that the production efficiency is low.

Disclosure of Invention

In view of the above, the present invention is directed to a screw, which can improve the conveying capacity of the rubber compound and improve the product quality.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a screw has a connecting portion connected to an extruder body, and a feeding portion, a homogenizing portion and a conveying portion which are arranged in this order downstream of the connecting portion in a length direction of the screw;

the feeding part is at least provided with a first spiral blade and a first spiral body which is arranged at intervals with the first spiral blade and spirally extends along the length direction of the spiral blade, and a plurality of first openings which are arranged at intervals along the extending direction of the first spiral body are constructed on the first spiral body;

the homogenizing part is provided with a second spiral blade and a third spiral blade arranged at an interval with the second spiral blade, and the third spiral blade is formed by branching one second spiral blade, extends to one side of the conveying part and is connected with the adjacent second spiral blade at the front end;

the conveying part is at least provided with a fourth spiral blade and a second spiral body which is arranged at intervals with the fourth spiral blade and spirally extends along the length direction of the spiral body, and a plurality of second gaps which are arranged at intervals along the extending direction of the second spiral body are formed on the second spiral body;

wherein the heights of the first spiral blade, the second spiral blade and the fourth spiral blade are the same and are greater than the heights of the first spiral body, the third spiral blade and the second spiral body.

Further, the lead angle of the first helical blade is greater than the lead angle of the second helical blade.

Further, the lead angle of the fourth helical blade is greater than the lead angle of the second helical blade.

Further, the thickness of the second spiral blade is larger than that of the third spiral blade.

Further, the pitch of the third helical blade is gradually reduced in a direction approaching the conveying part.

Further, the first helical blade and the fourth helical blade have the same structure.

Further, the first spiral body and the second spiral body have the same structure.

Further, the connecting part is provided with a flower-shaped key groove connected with the extruder body.

Further, the other end of the conveying part is configured to be hemispherical or conical with respect to the end of the conveying part connected to the homogenizing part.

Compared with the prior art, the invention has the following advantages:

(1) according to the screw, the first spiral bodies of the feeding part are provided with the first notches at intervals, the second spiral bodies of the conveying part are provided with the second notches, rubber materials can be divided, the mixing mode of the rubber materials in the screw is changed, the product quality can be improved, the flow direction of the rubber materials can be changed, quick material flow can be generated, and the conveying capacity of the screw for the rubber materials can be improved.

(2) The lead angle of the first spiral blade is larger than that of the second spiral blade, which is beneficial to promoting the flow of the rubber material from the feeding part to the homogenizing part, thereby improving the conveying capacity of the screw and improving the pressure stability in the main machine barrel of the extruder.

(3) The lead angle of the fourth spiral blade is larger than that of the second spiral blade, so that the conveying of rubber materials to the head of the screw rod is facilitated, the rubber materials can flow out of the extruder quickly, the production efficiency can be improved, and the excessive vulcanization of the rubber materials can be avoided.

(4) The thickness of the second spiral blade is larger than that of the third spiral blade, so that the second spiral blade can fully exert the conveying performance of the sizing material and the homogenization distinguishing performance of the third spiral blade on the sizing material.

(5) The pitch of the third spiral blade is gradually reduced along the direction close to the conveying part, so that the homogenization effect on the sizing material can be improved, and the solid sizing material can be promoted to be converted into a molten state.

(6) Connecting portion adopt flower type keyway and extruder main part to be connected, simple structure, and the manufacturing of being convenient for, simultaneously, also can be convenient for be connected between screw rod and the extruder main part to can improve the connection effect between the two.

(7) By configuring the other end of the conveying part into a cone shape or a hemisphere shape, the end part of the conveying part can be effectively prevented from forming a material flow dead zone, so that the using effect of the screw can be improved.

Another objective of the present invention is to provide an extruder, which includes an extruder main body having a driving source, wherein the extruder main body is provided with the screw rod, and the connecting portion of the screw rod is in transmission connection with the power output end of the driving source.

The extruder disclosed by the invention is beneficial to improving the product quality and the production efficiency by adopting the screw.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of a screw according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a spline according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a feeding part according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a homogenizing section according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a conveying unit according to an embodiment of the present invention;

description of reference numerals:

1-a flower-shaped key groove, 2-a first spiral blade, 3-a first spiral body, 4-a second spiral blade, 5-a third spiral blade, 6-a fourth spiral blade and 7-a second spiral body;

the device comprises an A-connecting part, a B-feeding part, a C-homogenizing part and a D-conveying part;

r-melting tank, G-solidification bed.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that the terms "upper" and "lower" indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The embodiment relates to a screw which is generally applied to an extruder, and when the screw is specifically applied, the screw is generally arranged in a cylinder of an extruder main body, and the screw can convey and melt a sizing material in the cylinder forwards through the friction force between the inner wall of the cylinder and the surface of the screw along with the rotation of the screw.

Specifically, as shown in fig. 1, the screw of the present embodiment has a connection portion a connected to an external member (i.e., an extruder body), and a feeding portion B, a homogenizing portion C, and a conveying portion D arranged in this order downstream of the connection portion a in the length direction of the screw.

As shown in fig. 2 in combination with fig. 1, in order to facilitate connection, a spline groove 1 connected to the extruder body is formed on the connection portion a, and the connection between the screw and the extruder body is formed by the spline groove 1, which is beneficial to improving the connection effect between the screw and the extruder body and also improving the transmission of power from the extruder body to the screw.

As shown in fig. 3 and fig. 1, the feeding portion B of the present embodiment has a first spiral blade 2 and a first spiral body 3 spaced from the first spiral blade 2 and spirally extending along the length direction of the spiral body, and the height of the first spiral blade 2 is greater than the height of the first spiral body 3, so as to improve the conveying effect of the rubber compound.

In addition, in order to improve the use effect, a plurality of first gaps are formed on the first spiral body 3 at intervals along the extending direction of the first spiral body, and compared with the prior art, the arrangement allows the rubber material to flow from the first gaps, so that the mixing mode of the rubber material in the screw can be changed, and the product quality can be improved. Meanwhile, the rubber material flow direction can be changed and divided by arranging the first gaps, and quick material flow is generated, so that the conveying capacity of the screw for the rubber material can be improved.

It should be noted that, in addition to only one first spiral blade 2 and one first spiral body 3, the feeding part B may also be provided with other spiral blades having a structure similar to that of the first spiral blade 2 and other spiral bodies having a structure similar to that of the first spiral body 3.

As shown in fig. 4 and also in fig. 1, the homogenizing part C of the present embodiment has a second spiral blade 4 and a third spiral blade 5 spaced from the second spiral blade 4, and the height of the second spiral blade 4 is equal to the height of the first spiral blade 2 and is greater than the height of the third spiral blade 5, so as to improve the conveying effect of the sizing material. As shown in fig. 1, the third spiral blade 5 of the present embodiment is branched from one of the second spiral blades 4, extends toward the conveying portion D, and is connected to the second spiral blade 4 adjacent to the tip. As shown in fig. 4, a first groove is formed between the third spiral blade 5 and the second spiral blade 4 located on the left side thereof, and a second groove is formed between the third spiral blade 5 and the second spiral blade 4 located on the right side thereof. The gum material in the unmelted state is distributed predominantly in the second trough and the gum material in the molten state is distributed predominantly in the first trough, based on the flow properties of the gum material itself.

In addition, to further improve the use effect, the pitch of the third helical blade 5 is gradually decreased in the direction close to the conveying part D, so that the homogenization effect on the rubber material can be improved, and the rubber material in a solid state can be promoted to be converted into a molten state. In particular, as shown in fig. 4, the first tank is arranged progressively larger and the second tank is arranged progressively smaller, in the direction of approach to the conveying section D, so that the area of the molten pool R (i.e. of molten compound) is greater and the area of the solid bed (i.e. of non-molten compound) is smaller and smaller.

In addition, as shown in fig. 1, the thickness of the second spiral blade 4 is greater than that of the third spiral blade 5, so that the second spiral blade 4 can fully exert the conveying performance of the rubber compound and the homogenization distinguishing performance of the third spiral blade 5 on the rubber compound.

As shown in fig. 5 in combination with fig. 1, the conveying portion D of the present embodiment has a fourth spiral blade 6 and a second spiral body 7 which is arranged at an interval with the fourth spiral blade 6 and extends spirally along the length direction of the spiral body, and the height of the fourth spiral blade 6 is the same as that of the second spiral blade 4 and is greater than that of the second spiral body 7. In addition, the second spiral body 7 is formed with a plurality of second slits provided at intervals in the extending direction thereof. Through setting up a plurality of second gaps, can allow the sizing material to flow by the second gap to when entering this conveying part D after the sizing material melts completely, can carry out the secondary to the sizing material and cut apart and mix, and then can improve the stability of sizing material, and improve product quality.

In addition, to further improve the use effect, as also shown in fig. 5, the other end of the conveying part D is configured to be hemispherical with respect to the end of the conveying part D connected with the homogenizing part C, so that the formation of a material flow dead zone at the head of the screw can be effectively prevented, and the outflow of the compound from the extruder can be promoted. Of course, instead of configuring the screw head as a hemisphere, it may be tapered. In addition, in addition to providing only one fourth spiral blade 6 and one second spiral body 7, the conveying portion D may also be provided with other spiral blades having a structure similar to that of the fourth spiral blade 6 and other spiral bodies having a structure similar to that of the second spiral body 7.

In addition, in order to fully utilize the respective performances of the respective portions of the screw and improve the synergistic effect of the respective portions, as shown in fig. 1, in the present embodiment, the lead angle of the first screw flight 2 is larger than the lead angle of the second screw flight 4, so that the flow of the rubber compound from the feeding portion B to the homogenizing portion C can be favorably promoted, the conveying capacity of the screw can be improved, and the stability of the pressure in the barrel of the extruder main body can be improved.

In addition, the lead angle of the fourth spiral blade 6 is larger than that of the second spiral blade 4, so that the conveying of rubber materials to the head of the screw rod is facilitated, the rubber materials can flow out of the extruder rapidly, the production efficiency can be improved, and the excessive vulcanization of the rubber materials can be avoided effectively. In addition, for the convenience of manufacturing, in the present embodiment, the first spiral blade 2 and the fourth spiral blade 6 have the same structure, and meanwhile, the first spiral body 3 and the second spiral body 7 have the same structure.

Based on the above overall description, the screw of this embodiment, through set up the first spirochaeta 3 that has a plurality of first openings in feeding portion B to and set up the second spirochaeta 7 that has a plurality of second openings in conveying portion D, can make this screw cut apart the sizing material, and change the mixing mode of sizing material in the screw, thereby can improve product quality, simultaneously, also can change the sizing material flow direction, and produce the material stream fast, and then can improve the carrying capacity of this screw to the sizing material.

In addition, the embodiment also relates to an extruder, which comprises an extruder main body with a driving source, wherein the extruder main body is provided with the screw rod, and the connecting part A of the screw rod is in transmission connection with the power output end of the driving source.

The extruder described in this embodiment is beneficial to improving the product quality and the production efficiency by adopting the screw rod described above.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.