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Temperature-dependent phase alternation surface shear plasticization method

An inclined surface and material technology, which is applied in the field of shear plasticizing of temperature-induced intersecting and changing surfaces, can solve the problems of small shear area, weak shearing effect, and low plasticizing pressure, and achieves the improvement of plasticizing effect and mixing degree. Effect

Inactive Publication Date: 2017-06-09
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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  • Temperature-dependent phase alternation surface shear plasticization method
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  • Temperature-dependent phase alternation surface shear plasticization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The selected two-component materials are: α-type polypropylene and high-density polyethylene, with melting points of 150°C and 130°C, respectively.

[0046] The control temperatures of the electromagnetic induction fast heating coil 13 and the circulating cooling coil 10 are 160° C. and 140° C. respectively, that is, the actual temperature alternates between 160° C. and 140° C., and the alternating period is 120 seconds.

[0047] Inner sleeve 2 has a diameter of 210mm, four layers of cylindrical grinding discs, a layer thickness of 10mm, an inclination of 2°, and a grinding disc length of 170mm. Outer sleeve 1 has a diameter of 260mm, including four layers of cylindrical grinding discs on the outer wall, with a layer thickness of 10mm, an inclination of 2°, and a grinding disc length of 170mm.

[0048] The disc gap is 1mm.

[0049] The outer diameter of the conveying screw 4 is 230mm, the length is 420mm, the screw pitch is 20mm, and the screw groove depth is 6mm. Spe...

Embodiment 2

[0051] The selected two-component materials are: nylon 6 and gamma polypropylene, the melting points are 210°C and 180°C respectively.

[0052] The control temperatures of the electromagnetic induction fast heating coil 13 and the circulating cooling coil 10 are 220° C. and 190° C. respectively, that is, the actual temperature alternates between 220° C. and 190° C., and the alternating period is 150 seconds.

[0053] Inner sleeve 2 has a diameter of 150 mm, three layers of cylindrical grinding discs, layer thickness of 10 mm, inclination of 3°, and grinding disc length of 120 mm. Outer sleeve 1 has a diameter of 200mm, including three layers of cylindrical grinding discs on the outer wall, with a layer thickness of 10mm, an inclination of 3°, and a grinding disc length of 120mm.

[0054] The disc gap is 1.5mm.

[0055] The outer diameter of the conveying screw 4 is 170mm, the length is 320mm, the screw pitch is 20mm, and the screw groove depth is 6mm. Speed ​​150rpm.

Embodiment 3

[0057] The selected three-component materials are: nylon 6, γ-type polypropylene, and low-density polyethylene, with melting points of 210°C, 180°C, and 135°C, respectively.

[0058] The control temperatures of the electromagnetic induction fast heating coil 13 and the circulating cooling coil 10 are 220° C. and 160° C. respectively, that is, the actual temperature alternates between 220° C. and 160° C., and the alternating period is 150 seconds.

[0059] Inner sleeve 2 has a diameter of 90 mm, two layers of cylindrical grinding discs, a layer thickness of 10 mm, an inclination of 2°, and a grinding disc length of 100 mm. Outer sleeve 1 has a diameter of 140mm, including three layers of cylindrical grinding discs on the outer wall, with a layer thickness of 10mm, an inclination of 2°, and a grinding disc length of 100mm.

[0060] The disc gap is 1.5mm. The number of interlayer material channels is 3, and the channel width is 10mm.

[0061] The outer diameter of the delivery ...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/52B29C47/38B29C47/58B29C47/80B29C48/395B29C48/50
CPCB29C48/397B29C48/465B29C48/50B29C48/802B29C48/82
Inventor 孙义明
Owner HUBEI UNIV OF TECH
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