Self-cleaning type synclastic differential rotation double-screw extrusion device and method

A twin-screw extrusion and differential rotation technology, which is applied in the field of self-cleaning co-rotating differential rotation twin-screw extrusion devices, can solve problems such as insufficient mixing capacity, achieve narrow residence time distribution, significant energy saving and consumption reduction, and increase The effect of extrusion yield

Active Publication Date: 2013-12-11
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

Method used

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  • Self-cleaning type synclastic differential rotation double-screw extrusion device and method
  • Self-cleaning type synclastic differential rotation double-screw extrusion device and method
  • Self-cleaning type synclastic differential rotation double-screw extrusion device and method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example 1

[0037] In this embodiment, a self-cleaning co-rotating differential 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 rotation speeds. The left screw and the right screw are meshed and connected, and the inner cavity of the barrel 1 Two connected cylindrical grooves, the left screw and the right screw are respectively arranged in the cylindrical groove; the left screw is a single-threaded or multi-threaded screw, the right screw is a multi-threaded screw; the cross-sectional profiles of the left and right screw are respectively A closed structure formed by connecting multiple curved arcs, and the cross-sectional shape of the left screw and the right screw are inconsistent;

[0038] Such as figure 2 As shown, the twin-screw assembly is horizont...

Example Embodiment

[0075] Example 2

[0076] In this embodiment, a self-cleaning co-rotating twin-screw extrusion device with differential rotation, 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 three-threaded screw, and the right screw 6 is a four-threaded screw; the curve forming the profile of the left screw has 12 segments, including 6 segments of circular arcs and 6 segments of non-circular curve arcs connected in phase; 16 segments of curve arcs composing the cross-sectional profile of the right screw, including 8 segments of circular arcs connected in phase and 8 segments of non-circular curve arcs.

[0077] Such as Figure 5 As shown in the initial position of the left screw 3 and the right screw 6, the left screw has three threads and the right screw has four threads. The cross-sectional shape of the left screw is different from that of the right screw. The rotation center of the two screws is O 1 , O 2 The cente...

Example Embodiment

[0103] Example 3

[0104] In this embodiment, a self-cleaning co-rotating differential rotating twin-screw extrusion device, such as Image 6 As shown, compared with Example 1, the difference is that in the twin-screw assembly, the left screw 3 is a double-threaded screw, and the right screw 6 is a five-threaded screw; the curve forming the profile of the left screw has 8 segments, including 4 segments of circular arcs and 4 segments of non-circular curve arcs connected in phases; 20 segments of curve arcs composing the cross-sectional profile of the right screw, including 10 segments of circular arcs connected in phases and 10 segments of non-circular curve arcs.

[0105] Such as Image 6 As shown in the initial position of the left screw 3 and the right screw 6, the left screw has a double-threaded thread and the right screw has a five-threaded thread. The cross-sectional shape of the left screw is different from that of the right screw. The rotation center of the two screws is O...

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Abstract

The invention discloses self-cleaning type synclastic differential rotation double-screw extrusion device and method. A double-screw assembly in the device comprises a left screw and a right screw which have different rotating speeds, the left screw and the right screw are connected in an engaging manner, the inner cavities of a machine barrel are two cylindrical troughs which are communicated, and the left screw and the right screw are arranged in the cylindrical troughs respectively; the left screw has a single-ended thread or multi-ended threads, and the right screw has multi-ended threads; the section contour of each of the left screw and the right screw is of a closed structure which is formed by connecting a plurality of sections of curve arcs, the section shape of the left screw is not the same as that of the right screw; according to the method, the melting and conveying of materials can be accelerated by utilizing different shapes of the sections of the two screws through the space change of runners of the screws and the inner cavities of the machine cylinder. According to the device and the method, plasticizing and mixing effects of high-polymer materials in a processing process can be effectively improved, and a self-cleaning function can be realized.

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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IPC IPC(8): B29C47/40B29C47/60B29C48/64
CPCB29C48/64B29C48/40
Inventor 徐百平喻慧文
Owner WUYI UNIV
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