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Twin-screw extruder with specially crafted yin and yang rotor profiles

A twin-screw extruder and rotor profile technology, applied in the field of extrusion equipment, can solve the problems of distributed mixing capacity, uniformity of plasticizing and mixing, shearing force can not meet the requirements, processing difficulties, etc.

Inactive Publication Date: 2014-12-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention has improved the shear mixing ability of the traditional counter-rotating twin-screw extruder to a certain extent, but it still cannot meet the requirements in terms of distribution mixing ability, uniformity of plasticizing mixing, shearing force, etc.
Moreover, the screw rotor has an integrated structure, and it is difficult to process thread sections with different leads and section lines or other forms in different sections of the screw feeding section, melting section, exhaust section and metering section.

Method used

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  • Twin-screw extruder with specially crafted yin and yang rotor profiles
  • Twin-screw extruder with specially crafted yin and yang rotor profiles
  • Twin-screw extruder with specially crafted yin and yang rotor profiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0045] In Embodiment 1, both the male and female rotors use cylindrical screws, and a twin-screw extruder with a head ratio of 4:1 between the male and female rotors is used. The schematic diagram of the structure is as follows figure 1 As shown, the position relationship of the male and female rotors in the extruder is as follows figure 2 shown. image 3 is the three-dimensional diagram of the cylindrical male and female rotors, the design parameters of the male and female rotors are: the number of female rotors with 5 heads is Z f =4, the number of 6 male rotors is Z m =1, top circle radius R a =63mm, installation center distance A=50mm, female rotor 5' helical auxiliary lead L f =400mm, male rotor 6' helical auxiliary lead L m =100mm and the length of the helical pair of male and female rotors L=800mm. The motor 12 drives the differential gear box 10 to rotate through the motor coupling 11, and the differential gear box 10 is connected with the male and female rotor s...

Embodiment approach 2

[0047] In Embodiment 2, both male and female screws are conical screws, that is, conical screws with the same outer taper angle of the outer diameter of the screw and the same inner taper angle of the root diameter of the screw groove. And a conical twin-screw extruder with a male-to-male rotor head ratio of 4:1 is used, and its structural diagram is as follows figure 1 As shown, the position relationship of the male and female rotors in the extruder is as follows figure 2 as shown, Figure 4 It is a three-dimensional diagram of the conical male and female rotors. The male and female rotors in Embodiment 2 adopt the same end surface profile as Embodiment 1. The design parameters are: the number of female rotors 5' is Z f =4, helical auxiliary lead L f =400mm; the number of heads of the male rotor 6' is Z m =1, helical auxiliary lead L m =100mm, the length of the helical pair of the male and female rotors L=800mm and the radius R of the top circle of the large end of the m...

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Abstract

The invention discloses a twin-screw extruder with specially crafted yin and yang rotor profiles. The invention belongs to the field of twin-screw extruder, and especially relates to a twin-screw extruder with specially crafted yin and yang rotor profiles. The extruder is an extrusion device used for carrying out mixing and extrusion upon particle raw materials. An extruder main body arranged on a frame is composed of a machine head, a cylinder, a gas discharge port, a heating and cooling device, a yin rotor, a yang rotor, a feeding device, and an end cap. The gas discharge port is arranged on the cylinder on a place corresponding to a gas discharge section. The feeding device is arranged on the cylinder on a place corresponding to a melting section. The heating and cooling device is covered on the outer wall of the cylinder. The yin and yang rotors with a feeding section, the melting section, the gas discharge section, and a measuring section are composed of thread sections, kneading disc elements, and toothed disc elements. When the extruder operates, large mixing capacity, shearing capacity, plasticizing and kneading uniformity, and the like can be provided. The device can be widely applied in processing and molding of various materials such as plastic, rubber, food, and medicine preparation.

Description

technical field [0001] The invention belongs to the field of twin-screw extruders, in particular to a twin-screw extruder with a special rotor profile, which is used for mixing and extruding granular raw materials. Background technique [0002] In petroleum, chemical, plastic, food, pharmaceutical and other industrial production, continuous operations such as mixing, stirring and plasticizing of high-viscosity and ultra-high-viscosity materials are often involved. Screw extruder is an important device to realize these functions. The twin-screw extruder is obviously superior to the single-screw extruder in terms of mixing performance, extrusion effect and output, and it can better solve the problems of stirring, mixing and plasticizing high-viscosity materials, and has great development potential . [0003] In the patent document CN201079735Y, Wei Jing and others invented a differential twin-screw extruder, which not only has the mixing, shearing and plasticizing and mixing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/64B29C48/67
CPCB29C47/406B29C47/6031B29C47/6056B29C48/40B29C48/42B29C48/54B29C48/57
Inventor 魏静梁新龙
Owner DALIAN UNIV OF TECH
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