A screw support device and a twin-screw extruder with the same

A twin-screw extruder and support device technology, applied in the field of screw support devices, can solve problems such as melt conveying capacity drop, melting capacity drop, pressure fluctuation, etc., to reduce equipment maintenance costs, reduce downtime, and prolong service life Effect

CN104999646BActive Publication Date: 2018-01-12HUNAN KUANGWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-01-12

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Abstract

The invention provides a screw support device and a double-screw extruder provided with the screw support device. The screw support device comprises one pair or more pairs of screw support elements, wherein two screw support elements used in pairs are mounted at the same axial positions of two screw spindles; each screw support element comprises an inner ring, an outer ring and a rolling body; two outer rings are limited by each other; the axial length of each outer ring is smaller than that of each inner ring; the clearance between the radial direction of the outer ring and the inner wall of a machine barrel is smaller than the clearance between a screw flight and the inner wall of the machine barrel; the radial clearance between two outer rings is smaller than the radial clearance between two screws; structures capable of keeping certain distance between the rolling bodies and preventing the rolling bodies from moving in the axial direction relative to the inner rings or the outer rings are arranged on the screw support elements. The double-screw extruder provided with the screw support device supports one or more different positions of the screws so as to eliminate the abrasion between the screws and the machine barrel and the abrasion between the screws.
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Description

technical field

[0001] The invention relates to a screw support device, in particular to a screw support device for a twin-screw extruder, and a twin-screw extruder with the device. Background technique

[0002] Twin-screw extruders are widely used in polymer processing such as molding, blending, modification, and reactive extrusion due to the variability and adaptability brought by its building block structure and excellent mixing performance. The twin-screw extruder mainly includes a transmission system, a feeding system, an extrusion system, a heating and cooling system, and a control system. The extrusion system is the core part of the twin-screw extruder, mainly including a screw and a barrel. The material is fed into the barrel by the feeding system, and the rotation of the screw in the barrel produces screw conveying and mixing effects on the material, so that the material undergoes extrusion processes such as solid conveying, melting, exhaust, mixing and melt conveyi...

Examples

Embodiment Construction

[0056] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered by the claims without being limited to the embodiments described herein. In addition, these embodiments are for the purpose of fully disclosing the present invention and facilitating a complete understanding of the scope of the claims by those skilled in the art. For ease of description, the size and relative size of each layer and area in the figure are exaggerated. The same reference numerals refer to the same elements in the figures.

[0057] Such as Figure 1A As shown, in the twin-screw extruder, the power is provided by the motor 60, and the torque is distributed and decelerated through the gear box 50. The screw 20 is connected with the output shaft of the gear box 50 through the connecting sleeve 40, and the material enters the barrel through the feeding port 30a. ...