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Fully-smooth conical screw rotors of double-screw extruder

A twin-screw extruder and conical screw technology, applied in the field of full-smooth conical screw rotors, can solve the problems of small output torque, poor load resistance, high processing accuracy requirements, etc., to increase the volume of the working chamber, The effect of reducing the working chamber volume

Active Publication Date: 2018-08-24
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Patent CN107139424 discloses a fully smooth twin-screw extruder screw rotor. The cross-sectional profile of the screw rotor is composed of 6 sections of curves, and 4 sections of arcs are used to connect the addendum arc and the dedendum arc. The processing accuracy is high; the cross-sectional profiles of the two screw rotors are the same at any axial position, and the parallel twin-screw extruder with the screw rotor as the core component is limited by the center distance between the two screws. Small distance, poor load resistance

Method used

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  • Fully-smooth conical screw rotors of double-screw extruder
  • Fully-smooth conical screw rotors of double-screw extruder
  • Fully-smooth conical screw rotors of double-screw extruder

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with accompanying drawings and examples.

[0045] Such as figure 1 Shown is the cross-sectional profile diagram of the fully smooth conical screw rotor of the proposed twin-screw extruder; the left cross-sectional profile (101) of the left screw rotor (1) consists of four curves, including two arcs and two sections of eccentric involute, counterclockwise as follows: left eccentric involute AB, left dedendum arc BC, conjugate curve CD of left eccentric involute and left addendum arc DA, corresponding The adjacent composition curves are completely and smoothly connected; the shape of the left section profile (101) of the left screw rotor (1) is exactly the same as that of the right section profile (201) of the right screw rotor (2).

[0046] Such as figure 2 Shown is the meshing diagram of the section profiles of the two screw rotors; the left section profile (101) of the left screw rotor (1) and the ...

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Abstract

The invention discloses fully-smooth conical screw rotors of double-screw extruder. The screw rotors are conical; the screw pitch P of each screw rotor is consistent; from a sucking-in end (I-I) to anemitting end (IX-IX), the addendum arc radius R1 of each cross section profile is gradually reduced, and the dedendum arc radius R3 is gradually increased; the addendum thickness theta 1 and the dedendum arc radius theta 2 of each screw rotor are persistently unchanged and identical in the axial direction; the two screw rotors are completely identical, and the axes of the screw rotors are parallel to each other; by adopting the fully-smooth conical screw rotors of double-screw extruder, the volume of a working cavity at each sucking-in end can be effectively increased, and the volume of the working cavity at each emission end is reduced, so that the screw rotors have a good extrusion function; for cross section profiles of the screw rotors at any axial positions, adjacent composition curves are completely smoothly connected; the screw rotors which are formed by extending from the cross section profiles along helixes can be meshed accurately; and friction abrasion to the screw rotors is reduced, so that the service life of the screw rotors is prolonged.

Description

technical field [0001] The invention relates to a co-rotating twin-screw extruder, in particular to a fully smooth conical screw rotor suitable for the co-rotating twin-screw extruder. Background technique [0002] Twin-screw extruder is an important equipment in processing machinery. Because of its good feeding performance, mixing and plasticizing performance and exhaust performance, it has been widely used in the molding and processing of extruded products; co-rotating twin-screw extruders The extruder completes the conveying, plasticizing, mixing and kneading of the polymer through the synchronous double-rotation motion of the two screw rotors; the core component of the twin-screw extruder is a pair of intermeshing screw rotors. Form and meshing accuracy directly affect the quality of extruded products. [0003] Patent CN107139424 discloses a fully smooth twin-screw extruder screw rotor. The cross-sectional profile of the screw rotor is composed of 6 sections of curves, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/64B29C48/67
CPCB29C48/67Y02P70/10
Inventor 王君冯希敏刘乃铭沙润东罗陈杰陆亚彪刘亚
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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