Melt static mixer suitable for extrusion molding plate production

Abstract

The invention discloses a melt static mixer suitable for extrusion molding plate production. The melt static mixer comprises a mixing cylinder and a mixing component, wherein the mixing component is arranged inside the mixing cylinder along the axial position of the mixing cylinder; the mixing component is in contact with the inner wall of the mixing cylinder; the mixing component comprises a mixing disperser and a flow dividing guide component; the mixing disperser is arranged inside the mixing cylinder along the axial position of the mixing cylinder; dispersing columns are arranged on the surface of the outer wall of the mixing disperser; the top of each dispersing column is in contact with the inner wall of the mixing cylinder; a gap is reserved between each dispersing column to allow materials to flow between each dispersing column; and the flow dividing guide component is arranged at the two ends of the mixing disperser to guide the materials to flow in and out. The melt static mixer solves the problems of uneven mixing and escaping of carbon dioxide and polystyrene in the melt conveying process so as to prevent carbon dioxide from forming errors in the foaming process and anextruded plate form shrinking in the production process, and the product quality is improved.

Description

technical field [0001] The invention relates to the technical field of extruded board production equipment, in particular to a melt static mixer suitable for extruded board production. Background technique [0002] In the process of producing extruded board, since the extruded board equipment is composed of two-stage screws in series, that is, the first-order melting screw plasticizes polystyrene, and then mixes it with the foaming agent and sends it to the second-stage foaming screw. The foam screw is cooled to a suitable temperature to make an extruded board. The first-stage screw and the second-stage screw are connected by a pipe. Since the melt flows in the pipe, there is a flow velocity distribution in the radial direction. The difference in radial velocity causes the difference in the melt performance between the center of the pipe and the wall of the pipe. , such as viscosity, temperature, etc. This difference will cause uneven distribution of carbon dioxide in the ...

AI Technical Summary

Problems solved by technology

Currently used static mixers such as Figure 9 As shown in the figure, the structure is that there are mixing units in the pipeline of the static mixer, which are arranged in a cross-section, and rhombic guiding convex parts are arranged on the surface of the mixing unit; when working, the material is in contact with the mixing unit, and the mixing unit is used to displace the mixing unit. The material is mixed evenly, but the following problems will occur during the use of this static mixer: First, when the material is mixed, because the pressure gradually drops after the material enters the static mixer, carbon dioxide is easy to flow from the original uniformly mixed molten Second, when mixing materials, most of the materials are actually in the middle of the static mixer, so it is impossible to quickly cool down the material in the middle of the static mixer, thus affecting the quality of the extruded board

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