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Star-shaped differential screw extruding machine

A screw extruder and differential speed technology, which is applied in the field of star differential screw extruders, can solve the problems of uneven force, large female screw deformation, and inability to adapt to different thread structures, etc., to improve product quality and quality The effect of steady improvement

Inactive Publication Date: 2013-02-06
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the thread structure is completely the same, it cannot adapt to the different thread structures required by the materials in different processing stages, and is not suitable for extrusion molding, granulation, and mixing of materials.
Moreover, the existing force of the differential twin-screw kneader is uneven, resulting in large deformation of the female screw, and it cannot be guaranteed that two stable working meshing areas can be formed.

Method used

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  • Star-shaped differential screw extruding machine
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  • Star-shaped differential screw extruding machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0027] figure 1 It is a schematic structural diagram of the star-shaped differential screw extruder used in Embodiment 1, wherein the screw part adopts three male screws 14 and one female screw 13, and the four screws are uniformly arranged in a star shape with the female screw 13 as the center, Each screw is a cylindrical screw. The screw rotor in the extruder 5 according to image 3 Arranged in a star arrangement as shown, figure 2 is a three-dimensional view of the individual screws arranged in a star shape. The motor 12 in the extruder distributes the torque to the male and female screws through the coupling 11 and the differential gear box 10. The differential gear box 10 has five output shafts. The synchronous differential gearbox 10 is connected with the male and female screw pairs of the star differential screw extruder through the coupling 9, so as to realize the differential motion of the male and female screw pairs. In the meshing area of ​​the screw pair, the f...

Embodiment approach 2

[0030] Figure 4 It is a schematic diagram of the structure of the conical star-shaped differential screw extruder used in the second embodiment. The screw rotor part of the extruder adopts three male screws 14 and one female screw 13, and the four screws are centered on the female screw 13. The star shape is evenly arranged, and the male and female screw rotors adopt conical screw rotors with the same outer cone angle of the outer diameter of the screw and the inner cone angle of the root diameter of the screw groove. The screw rotors in the extruder are 5 according to image 3 Arranged in a star arrangement as shown, Figure 5 is a three-dimensional view of the individual screws arranged in a star shape. In the meshing area of ​​the helical pair, the number of the female screw 13 is 1, the number of the male screw 14 is 3, the ratio of the rotation speed is 1:3, the three male screws 14 rotate in the same direction, and the female screw 13 and the The male screw rod 14 is ...

Embodiment approach 3

[0032] Image 6 It is a structural schematic diagram of the star-shaped differential screw extruder adopted in Embodiment 3. The screw rotor of the extruder adopts four male screws 14 and one female screw 13, and each screw is a cylindrical screw. Screw rotor 5 according to Figure 8 Arranged in a star arrangement as shown, Figure 7 is a three-dimensional view of the individual screws arranged in a star shape. In the meshing area of ​​the helical pair, the female screw 13 has 1 screw head, the male screw 14 has 4 screw heads, and the ratio of the rotation speed is 1:4. The four male screws 14 rotate in the same direction, and the female screw 13 and The male screw rod 14 is counter-rotating.

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Abstract

The invention provides a star-shaped differential screw extruding machine which is mainly composed of a machine head, a machine barrel, a heating device, a gas discharging port, a screw, a machine frame, a feeding device, an end cover, a coupler, a differential reduction gearbox, a motor coupler and a motor. The motor is connected with a reducer through the motor coupler, the reducer is connected with the screw through the coupler, the machine frame supports the machine barrel, a machine barrel wall is covered on the heating device, the gas discharging port is arranged at a position of the machine barrel close to the machine head, and the feeding device is arranged at a position of the machine barrel close to the end cover. The star-shaped differential screw extruding machine can form a plurality of meshing areas, and the gas discharging port is connected with a gas discharging device to achieve devolatilization of moisture and other gas. The star-shaped differential screw extruding machine has great improvement on the aspects of extrusion yield, plasticizing mixing evenness, shear force, quality stability and the like.

Description

technical field [0001] The invention relates to an extrusion device for mixing and extruding granular raw materials and outputting them, in particular to a star-shaped differential screw extruder. 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. Multi-screw extruders are obviously superior to single-screw extruders and twin-screw extruders in terms of mixing and extrusion effects and output, and solve the defects of low efficiency and non-continuous operation of traditional kneaders. Development potential. [0003] Initially, a differential twin-screw kneader was proposed by the patent CN201079735Y, which not only has the mixing, shearing and plasticizing and mixing functions of traditional kneading equipmen...

Claims

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Application Information

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IPC IPC(8): B29C47/42B29C47/60B29C48/41
CPCB29C47/6068B29C47/40B29C47/406B29C48/42B29C48/585B29C48/44B29C48/41
Inventor 魏静梁新龙陈大兵孙伟
Owner DALIAN UNIV OF TECH