Self-cleaning co-rotating differentially rotating twin-screw extrusion device and method

A twin-screw extrusion and differential rotation technology, applied in the field of self-cleaning co-rotation differential rotation twin-screw extrusion devices, can solve problems such as insufficient mixing capacity, and achieve narrow residence time distribution, low energy consumption, and increased extrusion. Yield effect

Active Publication Date: 2015-12-23
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such extruders have obvious deficiencies in the mixing ability in the process of processing nanomaterials and functional polymer materials.

Method used

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  • Self-cleaning co-rotating differentially rotating twin-screw extrusion device and method
  • Self-cleaning co-rotating differentially rotating twin-screw extrusion device and method
  • Self-cleaning co-rotating differentially rotating twin-screw extrusion device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this embodiment, a self-cleaning type co-rotating differentially rotating twin-screw extrusion device, such as figure 1 , image 3 or Figure 4 As shown, it includes a twin-screw assembly and a barrel 1. The twin-screw assembly is arranged in the barrel. The twin-screw assembly includes a left screw 3 and a right screw 6 with different rotational speeds. The left screw and the right screw are engaged and connected. The inner cavity of the barrel 1 It is two connected cylindrical grooves, the left screw and the right screw are respectively arranged in the cylindrical groove; the left screw is a screw with single thread or multi-thread, and the right screw is a screw with multi-thread; the cross-sectional profiles of the left screw and the right screw are respectively A closed structure formed by connecting multiple sections of curved arcs, and the cross-sectional shapes of the left screw and the right screw are inconsistent;

[0038] Such as figure 2As shown, the ...

Embodiment 2

[0076] In this embodiment, a self-cleaning type co-rotating differentially rotating twin-screw extrusion device, such as Figure 5 As shown, compared with Example 1, the difference is that in the twin-screw assembly, the left screw 3 is a screw with three threads, and the right screw 6 is a screw with four threads; the curved arc that forms the cross-sectional profile of the left screw has 12 segments, including 6 segments of circular arcs and 6 segments of non-circular curved arcs connected alternately; 16 segments of curved arcs forming the cross-sectional profile of the right screw, including 8 segments of circular arcs and 8 segments of non-circular curved arcs connected alternately.

[0077] Such as Figure 5 As shown, the initial positions of the left screw rod 3 and the right screw rod 6, the left screw rod is a three-start thread, and the right screw rod is a four-start thread. The cross-sectional shape of the left screw is different from that of the right screw, and ...

Embodiment 3

[0104] In this embodiment, a self-cleaning type co-rotating differentially rotating twin-screw extrusion device, such as Figure 6 As shown, compared with Example 1, the difference is that in the twin-screw assembly, the left screw 3 is a screw with double threads, and the right screw 6 is a screw with five threads; the curved arc forming the cross-sectional profile of the left screw has 8 sections, including 4 sections of circular arcs and 4 sections of non-circular curved arcs connected with each other; 20 sections of curved arcs forming the cross-sectional profile of the right screw, including 10 sections of circular arcs and 10 sections of non-circular curved arcs connected with each other.

[0105] Such as Figure 6 As shown, the initial positions of the left screw rod 3 and the right screw rod 6, the left screw rod is a double thread, and the right screw rod is a five-start thread. The cross-sectional shape of the left screw is different from that of the right screw, an...

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Abstract

The invention discloses a self-cleaning type co-rotating differentially rotating twin-screw extrusion device and method. The twin-screw assembly in the device includes a left screw and a right screw with different rotating speeds. The left screw and the right screw are meshed and connected. The inner cavity of the barrel is Two connected cylindrical grooves, the left screw and the right screw are respectively arranged in the cylindrical groove; the left screw is a screw with single thread or multi-thread, and the right screw is a screw with multi-thread; the cross-sectional profiles of the left screw and the right screw are respectively multi-segment It is a closed structure connected by curved arcs, and the cross-sectional shapes of the left screw and the right screw are inconsistent; the method is to use the different cross-sectional shapes of the two screws, and the change of the space between the screw and the inner cavity of the barrel to accelerate the melting and conveying of materials . The invention can effectively improve the plasticizing and mixing effects in the process of polymer material processing, and realize the function of self-cleaning.

Description

technical field [0001] The invention relates to a polymer material plasticizing exhaust extrusion processing technology, in particular to a self-cleaning type co-rotating differentially rotating twin-screw extrusion device and method. Background technique [0002] The processing equipment widely used in the field of polymer material processing is mainly the co-rotating twin-screw extruder with self-cleaning function, which realizes the blending, alloying and reactive extrusion of various materials. The principle is: the two screws have exactly the same structure, and there is a certain phase angle difference during installation. The phase angle varies with the number of threads, and the center distance of the screws is related to the number of threads and the top angle. Due to the same shape of the two screws, there is consistency (that is, symmetry). When the material moves between the two screws, the flow channel volume is the same during the process, so that the material ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/40B29C47/60
CPCB29C48/64B29C48/40
Inventor 徐百平喻慧文
Owner WUYI UNIV
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