Temperature-dependent phase alternation surface shear plasticization method

Abstract

The invention discloses a temperature-dependent phase alternation surface shear plasticization method. According to the method, a surface shear grinding device is formed by connecting an inner sleeve with annular comb teeth and an outer sleeve with annular comb teeth in a butt-joint manner, and in combination with the fast heating and fast refrigeration of materials, materials with different melting points or softening points in at least two components are treated through a mixing plasticization method; the materials with the low melting point or the low softening point in the components are always in the molten state in the plasticization process, the materials with the high melting point or the high softening point are subjected to fast temperature control, the phase state of the materials with the high melting point or the high softening point is alternately changed among the solid state, the semi-solid state and the molten state, in cooperation with the mechanical grinding function of the full plane shear, solid particles and melt fragments of the materials are refined, homogenized, micro-fibered and plasticized under the function of repeatedly and alternately conducting fracture, fragmentation, friction and the like, the plasticization effect can be improved greatly, and the mixed materials are dispersed to the great extent.

Description

technical field [0001] The invention relates to a temperature-induced phase-alternating surface shear plasticization method, which is specifically for mixing and plasticizing materials with at least two components with different melting points or softening points, and using temperature fluctuations to alternately change the materials between solid and liquid states , the mechanical grinding effect of the shearing of the mating surface makes the solid particles and melt fragments in the mixed materials with different melting points alternately broken, fragmented, and rubbed to be refined, homogenized, and plasticized. It belongs to the molding process of polymer materials. technology field. Background technique [0002] Good plasticizing quality is a necessary prerequisite for the molding and processing of all polymer materials. When mixing and plasticizing materials with at least two components with different melting points or softening points, the traditional plasticizing ...

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Problems solved by technology

That is to say, drag shearing and extrusion deformation kneading, the plasticizing shearing method is not surface shearing, the common problems are: low plasticizing pressure, weak shearing effect, poor mixing and dispersion

This patent shows that strong shearing can improve the mixing effect, but the disadvantage is that the shearing area is small, the shearing gap is large, and the shearing effect is not too large; The principle of the device is that another screw is installed inside the screw, and the helical direction of the two screws is opposite to the direction of rotation. The rotation uses the differential motion of the inner and outer screws to produce volume changes and then plasticize. The disadvantage is that the shear area is not large.

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