Four-ledge zigzag dynamic variable-gap internal mixer rotor

Abstract

The invention discloses a four-ledge zigzag dynamic variable-gap internal mixer rotor. The internal mixer rotor comprises a rotor body, wherein four ledges are arranged on the rotor body and comprise two long ledges and two short ledges; the ledges spirally extend from two ends of the rotor body to the middle of the rotor body; each ledge comprises an initial end and a tail end; a plurality of tooth grooves are formed in the top of each ledge; widths of the tooth grooves of each ledge are not changed in the direction from the initial end to the tail end; and distances among the tooth grooves are gradually reduced. The four-ledge zigzag dynamic variable-gap internal mixer rotor has the beneficial effects that the tooth grooves are formed in the ledges of the internal mixer rotor, circumferential flowing of rubber is changed, and distributing and dispersing of various packing and ingredients are facilitated; and the number and the distribution density of the tooth grooves are increased along with increasing of circumferential flowing speed of the rubber, the effect of mutual kneading of the lump-shaped rubber among the ledges is improved, so that flowing of the rubber in a mixing chamber is disordered, and rubber mixing quality and rubber mixing efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of rubber and plastic machinery equipment, in particular to a four-edged sawtooth type dynamic variable clearance internal mixer rotor. Background technique [0002] During the rubber mixing process, there are two main forms of movement of the rubber (rubber and carbon black, etc.) There will be two circumferential movements in the mixing chamber; the other form of movement is axial movement. The axial movement can play the role of automatic glue turning and mixing, so that the rubber material tends to be dispersed and mixed in the mixing chamber. best. During the flow process, the shearing and stretching action of the rotor produces a new interface, and this new interface is an important factor to improve the mixing effect of small materials. [0003] However, for the shear type rotor of the internal mixer, due to the existence of the rotor ribs, the gyration radius of each point on the rotor surface is n...

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Problems solved by technology

[0004] On the other hand, for shear rotors, as the radius of gyration of the rotor surface increases, the gap between the rotor and the inner wall of the internal mixing chamber will become smaller, and the gap formed between the rib top of the rotor and the inner wall of the internal mixing chamber is the cause of high shear. The shear stress and the smaller gap directly lead to a sharp rise in temperature when the rubber is mixed, which is easy to cause glue burning

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