Six-ridge serrated dynamic variable-gap internal mixer rotor

Abstract

The invention discloses a six-ridge serrated dynamic variable-gap internal mixer rotor which comprises a rotor body. Six protruded ridges are arranged on the rotor body, include three long ridges and three short ridges, spirally extend from two ends of the rotor body to the middle of the rotor body and comprise starting ends and finish ends; a plurality of tooth spaces are respectively arranged on ridge tops of the protruded ridges, the difference of the widths of the tooth spaces on each protruded ridge keeps unchanged in the direction from the starting end to the finish end of the protruded ridge, and the distances among the tooth spaces on each protruded ridge are gradually shortened in the direction from the starting end to the finish end of the protruded ridge. The six-ridge serrated dynamic variable-gap internal mixer rotor has the advantages that the tooth spaces are additionally arranged at the protruded ridges of the six-ridge serrated dynamic variable-gap internal mixer rotor, accordingly, peripheral flowing of rubber materials can be changed, and the six-ridge serrated dynamic variable-gap internal mixer rotor is favorable for distributing and dispersing various fillers and compounding ingredients; the quantities and the distribution density of the tooth spaces are increased along with increase of the peripheral flowing speeds of the rubber materials, accordingly, effects of masticating the lump-shaped rubber materials among the ridges can be enhanced, the rubber materials can flow in internal mixing chambers chaotically, and the rubber mastication quality and the rubber mastication efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of rubber and plastic machinery equipment, in particular to a hexagonal sawtooth 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 not the...

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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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