CN215791652U

CN215791652U - Precise thread element for double-screw extruder

Info

Publication number: CN215791652U
Application number: CN202121893666.6U
Authority: CN
Inventors: 李忠
Original assignee: Maanshan Jieteri Machinery Manufacturing Co ltd
Current assignee: Maanshan Jieteri Machinery Manufacturing Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-02-11
Anticipated expiration: 2031-08-13

Abstract

The utility model discloses a precise thread element for a double-screw extruder, which comprises thread element bodies, wherein the thread element bodies are used in pairs, the pair of thread element bodies are meshed with each other and rotate, two end faces of the thread element bodies are arranged in parallel, each thread element body comprises a first sleeve, a first thread and a second thread are integrally formed on the outer wall of the first sleeve, the first thread and the second thread are consistent in size and are arranged in a rotating staggered mode by 180 degrees, a first notch parallel to the end face of the thread element body is formed in the first thread, a second notch parallel to the end face of the thread element body is formed in the second thread, and the first notch and the second notch are arranged in a staggered mode along the axial direction of the thread element. The utility model can mix while pushing in the course of extruding, reduce the number of screw elements.

Description

Precise thread element for double-screw extruder

The technical field is as follows:

the utility model relates to the technical field of double-screw extruder accessories, in particular to a precise thread element for a double-screw extruder.

Background art:

the double-screw extruder has the characteristics of good charging performance, mixing plasticizing performance, exhaust performance, extrusion stability and the like, and is widely applied to the molding processing of extruded products at present. The current screw extruders have a tight-intermeshing screw geometry in which the profile of the screw elements on one screw closely matches the profile of the screw elements on the other screw, including a pressure feed section, a shear section, etc. during extrusion.

The screw thread elements on the existing double screw extruder are sleeved on the screw in a building block mode, each section of the screw thread elements realizes one function, such as a pressure conveying section and a shearing section, and the screw thread elements on each section of the screw thread elements realize a single function, so that the screw for completing corresponding work needs to be longer.

The utility model has the following contents:

the utility model aims to solve the technical problems and provides a precise thread element for a double-screw extruder.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a precision thread component for twin-screw extruder, includes the screw element body, the screw element body uses in pairs, and a pair of screw element body intermeshing rotates, the both ends face parallel arrangement of screw element body, the screw element body is including first sleeve, integrated into one piece has first screw thread and second screw thread on the outer wall of first sleeve, first screw thread and second screw thread size unanimous and rotatory dislocation 180 arrange, set up the first breach parallel with screw element body terminal surface on the first screw thread, set up the second breach parallel with screw element body terminal surface on the second screw thread, first breach and second breach along screw element axial dislocation arrangement.

Furthermore, the bottoms of the first notch and the second notch are provided with round corners facilitating material circulation.

Furthermore, the inner hole periphery of the first sleeve is provided with a spline.

Further, the number of the splines is even, and the symmetry line of the splines is consistent with the center line of the thread.

Furthermore, the top of the first thread is provided with an engaging surface, and the width of the top of the section of the first thread is smaller than that of the bottom of the section of the first thread.

Further, the depth of the first notch and the second notch is less than half of the height of the first thread or the second thread.

The utility model provides a precise thread element for a double-screw extruder, which has the following beneficial effects: the first thread and the second thread are provided with the notches, so that when the threaded element extrudes and pushes materials, the materials can flow out of the notches to be mixed with the surrounding materials, the materials can be mixed while being pushed and extruded, and the number of the threaded elements is reduced; the notch is parallel to the end face, so that the material can transversely move, and the material can better enter an adjacent channel in the moving process.

Description of the drawings:

the following detailed description of embodiments of the utility model is provided in conjunction with the appended drawings:

FIG. 1 is a schematic front view of a precision threaded element for a twin-screw extruder according to the present invention;

FIG. 2 is a schematic side view of a precision threaded element for a twin-screw extruder according to the present invention;

FIG. 3 is a schematic perspective view of a precision screw element for a twin-screw extruder according to the present invention;

FIG. 4 is a schematic view showing the first and second screw threads of the precision screw element for a twin-screw extruder according to the present invention.

The reference numbers in the figures illustrate: 1. a threaded element body; 11. a first sleeve; 12. a first thread; 13. a second thread; 14. a first notch; 15. a second notch; 16. a spline; 17. and (4) engaging surfaces.

The specific implementation mode is as follows:

it should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up-down-left-right-front-back … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components in a specific posture (as shown in the figure) -motion situation, etc., and if the specific posture is changed, the directional indicators are changed accordingly, and the connection may be a direct connection or an indirect connection.

As shown in fig. 1 to 4, a precision threaded component for a twin-screw extruder includes a threaded component body 1, the threaded component body 1 is used in pairs, the pair of threaded component bodies 1 are engaged with each other and rotate, two end faces of the threaded component body 1 are arranged in parallel, the threaded component body 1 includes a first sleeve 11, a first thread 12 and a second thread 13 are integrally formed on an outer wall of the first sleeve 11, the first thread 12 and the second thread 13 have the same size and are rotationally staggered by 180 °, a first notch 14 parallel to the end face of the threaded component body 1 is formed on the first thread 12, a second notch 15 parallel to the end face of the threaded component body 1 is formed on the second thread 13, and the first notch 14 and the second notch 15 are axially staggered along the threaded component.

By adopting the technical scheme, the first thread 12 and the second thread 13 are provided with the notches, so that when the threaded elements extrude and push materials, the materials can flow out of the notches to be mixed with surrounding materials, the materials can be mixed while being pushed and extruded, and the number of the threaded elements is reduced; the notch is parallel to the end face, so that the material can transversely move, and the material can better enter an adjacent channel in the moving process.

Specifically, the bottoms of the first notch 14 and the second notch 15 are provided with round corners facilitating material circulation. Through setting up the fillet, make things convenient for the material circulation.

Specifically, the inner hole circumference of the first sleeve 11 is provided with a spline 16. The spline 16 is sleeved on a screw mandrel of a double-screw extruder, so that the position of the threaded element body 1 is relatively stable.

Specifically, the number of the splines 16 is even, and the symmetry line of the splines 16 is consistent with the center line of the thread. Thereby maintaining the precise interengagement of the adjacent pairs of threaded members.

Specifically, the top of the first thread 12 is provided with an engaging surface 17, and the width of the top of the section of the first thread 12 is smaller than that of the bottom.

In particular, the depth of the first and

second indentations

14, 15 is less than half the height of the first or

second thread

12, 13. Through the degree of depth setting of breach for the material can be passed, makes only partial material flow from the incision to both sides and mixes, avoids the material to flow too much.

The foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is to be protected by the following claims and their equivalents.

Claims

1. A precision thread element for a twin-screw extruder, characterized in that: including screw element body (1), screw element body (1) uses in pairs, and a pair of screw element body (1) intermeshing rotates, the both ends face parallel arrangement of screw element body (1), screw element body (1) is including first sleeve (11), integrated into one piece has first screw thread (12) and second screw thread (13) on the outer wall of first sleeve (11), first screw thread (12) and second screw thread (13) size unanimous and rotatory dislocation 180 arrange, set up first breach (14) parallel with screw element body (1) terminal surface on first screw thread (12), set up second breach (15) parallel with screw element body (1) terminal surface on second screw thread (13), first breach (14) and second breach (15) are along screw element axial dislocation arrangement.

2. A precision threaded element for a twin-screw extruder according to claim 1, characterized in that: the bottom of the first notch (14) and the bottom of the second notch (15) are provided with round corners facilitating material circulation.

3. A precision threaded element for a twin-screw extruder according to claim 1, characterized in that: the inner hole periphery of the first sleeve (11) is provided with a spline (16).

4. A precision threaded element for a twin-screw extruder according to claim 3, characterized in that: the number of the splines (16) is even, and the symmetry line of the splines (16) is consistent with the central line of the thread.

5. A precision threaded element for a twin-screw extruder according to claim 1, characterized in that: the top of the first thread (12) is provided with an engaging surface (17), and the width of the top of the section of the first thread (12) is smaller than that of the bottom.

6. A precision threaded element for a twin-screw extruder according to claim 1, characterized in that: the depth of the first notch (14) and the second notch (15) is less than half the height of the first thread (12) or the second thread (13).