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Homodromous self-cleaning double-screw extruder with stretching function and processing method thereof

A twin-screw extruder and screw technology, applied in presses, manufacturing tools, material forming presses, etc., can solve problems such as twin-screw inability to extrude and mix, low work efficiency, and long processing history

Active Publication Date: 2013-05-22
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the two screws have the same shape and symmetry, that is, the cross-sectional shape of the runner will not change periodically, so after the material enters the inner cavity from the feed port, the twin-screw cannot squeeze and mix the material, so that The material lacks the effect of compression and extrusion when it is in the flow channel
Due to the above factors, the current co-rotating twin-screw extruder with self-cleaning function needs to consume a lot of energy when processing materials, use more additives, water and materials, etc., and the output is low; at the same time, the processing of materials The process is longer and the microscopic phase structure of the product is poor and the work efficiency is low

Method used

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  • Homodromous self-cleaning double-screw extruder with stretching function and processing method thereof
  • Homodromous self-cleaning double-screw extruder with stretching function and processing method thereof
  • Homodromous self-cleaning double-screw extruder with stretching function and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] like figure 1 and figure 2 The shown co-direction self-cleaning twin-screw extruder with stretching effect includes a barrel 1 and a screw mechanism. The barrel 1 is provided with an inner cavity 4, and the screw mechanism is installed in the inner cavity 4. The screw The mechanism includes a first screw 2 and a second screw 3, the first screw 2 and the second screw 3 are engaged with each other, and both the first screw 2 and the second screw 3 are tangent to the inner wall of the cavity 4; The first screw 2, the second screw 3 and the inner cavity 4 of the barrel 1 form flow passages; the cross-sections of the first screw 2 and the second screw 3 are composed of multiple circular arcs with different radii of curvature, and the first The cross-sectional shapes of the screw 2 and the second screw 3 are different, but the arc numbers of the two cross-sections are equal; when the first screw 2 and the second screw 3 rotate, the cross-sectional shape of the flow channel ...

Embodiment 2

[0067] like image 3 As shown, this co-directional self-cleaning twin-screw extruder with stretching effect is the same as that of Embodiment 1 except for the following features: the number of circular arcs in the cross-section of the first screw 2 and the second screw 3 is 10 segments, wherein , the 10 arcs of the section of the first screw 2 are respectively H 1 h 2 、H 2 h 3 、H 3 h 4 、H 4 h 5 、H 5 h 6 、H 6 h 7 、H 7 h 8 、H 8 h 9 、H 9 h 10 and H 10 h 1 , and the arc H 1 h 2 、H 2 h 3 、H 3 h 4 、H 4 h 5 、H 5 h 6 、H 6 h 7 、H 7 h 8 、H 8 h 9 、H 9 h 10 and H 10 h 1 The central angle of the circle is α 21 , β 21 , γ21 , β 22 、α 22 、α 23 , β 23 , γ 22 , β 24 and alpha 24 , and the arc H 1 h 2 、H 5 h 6 、H 6 h 7 and H 10 h 1 are all tangent to the lumen 4,

[0068] Among them, β 21 =β 22 =β 23 =β 24 ,

[0069]0≤α 23 +α 22 21 +β 22 +β 23 +β 24 ) / 2-(γ 21 +γ 22 ) / 2,

[0070] That is, 0≦α 23 +α 22 21 +α 24 ; at the same...

Embodiment 3

[0076] like Figure 4 As shown, this co-directional self-cleaning twin-screw extruder with stretching effect is the same as that of Embodiment 1 except for the following features: the number of circular arcs in the cross-section of the first screw 2 and the second screw 3 is 7 sections, wherein , the seven arcs of the section of the first screw 2 are respectively M 1 m 2 , M 2 m 3 , M 3 m 4 , M 4 m 5 , M 5 m 6 , M 6 m 7 and M 7 m 1 , and the arc M 1 m 2 , M 2 m 3 , M 3 m 4 , M 4 m 5 , M 5 m 6 , M 6 m 7 and M 7 m 1 The central angle of the circle is α 31 , β 31 , γ 32 , ε 31 , ε 32 , γ 31 and beta 32 , and the arc M 1 m 2 Tangent to lumen 4;

[0077] Among them, β 31 =β 32 , ε 31 =ε 32 ,

[0078] 031 31 +β 32 ) / 2-γ 32 / 2-ε 31 / 2-ε 32 / 2,

[0079] That is, 031 31 ;

[0080] The seven arcs of the section of the second screw 3 are respectively N 1 N 2 , N 2 N 3 , N 3 N 4 , N 4 N 5 , N 5 N 6 , N 6 N 7 and N 7 N 1 , the ar...

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Abstract

The invention discloses a homodromous self-cleaning double-screw extruder with a stretching function. The homodromous self-cleaning double-screw extruder with the stretching function comprises a machine barrel, a first screw and a second screw. The cross section of the first screw and the cross section of the second screw are both formed by multiple sections of circular arcs which are unequal in radius of curvature, and the cross section of the first screw and the cross section of the second screw are different in shape. The invention further provides a processing method of the homodromous self-cleaning double-screw extruder with the stretching function. According to the homodromous self-cleaning double-screw extruder with the stretching function and the processing method of the homodromous self-cleaning double-screw extruder with the stretching function, when the first screw and the second screw which are different in cross-section shape rotate in an identical direction, periodical change happens to a cross-section shape of a flow passage, so that a compression action and a squeezing action are applied on materials in the flow passage, a flowing space of the materials is compressed and expanded in a periodical mode, and therefore a chaotic mixing effect is generated, a mixing and heat transfer process is strengthened, a thermal and mechanical process which is plasticized is largely shortened, energy consumption is low, an energy-saving and consumption-reducing effect is notable.

Description

technical field [0001] The invention relates to the technical field of twin-screw extruders, in particular to a co-directional self-cleaning twin-screw extruder with stretching effect and a processing method thereof. Background technique [0002] In recent years, the fields of polymer material processing and food processing have been moving towards the direction of saving energy, reducing additives, saving water and materials, shortening the processing process, and controlling the microscopic phase structure of products. The co-rotating twin-screw extruder with self-cleaning function is a processing equipment widely used in the fields of polymer material processing and food processing. The co-rotating twin-screw extruder with self-cleaning function mainly includes a barrel and two twin-screws installed in parallel in the inner cavity of the barrel. When the material to be processed enters the inner cavity of the barrel from the feed port, the twin-screw mainly conveys and m...

Claims

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Application Information

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IPC IPC(8): B30B11/24B29C47/40B29C47/60B29C47/58B29C48/65B29C48/40B29C48/50
CPCB29C48/65B29C48/40B29B7/489
Inventor 徐百平喻慧文王玫瑰颜倩何亮
Owner GUANGDONG IND TECHN COLLEGE
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