Synchronous four-ridge sawtooth type dynamic clearance changing internal mixer rotor

Abstract

The invention discloses a synchronous four-ridge sawtooth type dynamic clearance changing internal mixer rotor. The internal mixer rotor comprises a rotor body. The rotor body is provided with four protruding ridges including the two long ridges and the two short ridges. The protruding ridges spirally extend to the middle from the two ends of the rotor body, and a starting end and an ending end are included. A plurality of tooth grooves are formed in the ridge tops of the protruding ridges, the width difference of the tooth grooves in each protruding ridge is not changed in the direction from the starting end to the ending end, the distances between the tooth grooves are gradually reduced, and two different degrees of changes in the aspect of depth and shallowness exist on the tooth grooves in the axial direction of the rotor. The synchronous four-ridge sawtooth type dynamic clearance changing internal mixer rotor has the beneficial effects that the tooth grooves are additionally formed in the positions of the protruding ridges of the internal mixer rotor, circumferential flowing of a sizing material is changed, and distributing and scattering of various kinds of filler and compounding agents are facilitated; the number and the distributing density of the tooth grooves are increased along with increasing of the circumferential flowing speed of the sizing material, the mutual kneading function of the lump sizing material is enhanced, flowing of the sizing material in a mixer chamber is more disordered, and the milling quality and 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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