Synchronous six-edge saw tooth type dynamic variable-gap internal mixer rotor

Abstract

The invention discloses a synchronous six-edge saw tooth type dynamic variable-gap internal mixer rotor. The internal mixer rotor comprises a rotor body; six convex edges are arranged on the rotor body, and include three long edges and three short edges; the convex edges spirally extend from two ends to middle of the rotor body, and include starting ends and ending ends; multiple tooth grooves are respectively formed in the edge tops of the convex edges; the distances between the tooth grooves are gradually decreased; and the depths of the tooth grooves are respectively changed on three edges of the same peripheral direction of the rotor by deep and shallow two gaps. The synchronous six-edge saw tooth type dynamic variable-gap internal mixer rotor has the following beneficial effects: the tooth grooves are added in the convex edges of the internal mixer rotor to change the peripheral flowing of glue, so that the distribution and the dispersion of various fillers and matching agents are facilitated; and the number and the distribution density of the tooth grooves are increased along with increment of the peripheral flowing speed of the glue, so that the kneading effect of the lump-shaped glue between the edges is reinforced, the flowing of the glue in a mixing chamber is more disordered, and the glue mixing quality and the glue 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 synchronous hexagonal 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 s...

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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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