A dynamic rotary sintering molding method and molding device for a porous material

Abstract

The invention discloses a porous material dynamic rotary sintering forming method and a forming device thereof. The sintering molding device includes a sintering chamber body, a male mold fixed above the sintering chamber body and a female mold below; the cavity between the male mold and the female mold constitutes a material sintering chamber; the outer wrapping of the sintering molding device There is an electric heating jacket; one side of the sintering chamber body is connected to the rotating mechanism through a connecting shaft. When the rotating mechanism rotates, the sintering molding device rotates synchronously with the rotating mechanism. The invention adopts the dynamic rotation and rotation method to heat and sinter the ultra-high molecular weight polyethylene powder. During the sintering process, the sintering molding device is always in a rotating state, so that the material is in a moving state, and the high-viscosity material is kept in a static state for a long time and the pores are avoided. Uneven distribution and uneven upper surface can heat the material evenly, so that the product has good porosity, uniform porous structure, high mechanical properties and dimensional accuracy, and the molding cycle is short and easy to operate.

Description

technical field [0001] The invention relates to the technical field of forming porous polymer materials, in particular to a dynamic rotary sintering forming method for porous materials and a forming device thereof. Background technique [0002] Open-porous porous polymer materials have the advantages of low relative density, high specific strength, light weight, sound insulation, heat insulation, and good permeability because of their internal three-dimensional network pore structure. Single-function materials are widely used in biomedicine, filtration separation, osmosis and absorption processes in industrial production and life. There are many methods for the preparation of open-cell porous polymer materials, such as melt extrusion stretching method, thermally induced phase separation method, microfoaming method and powder sintering method. For some high-molecular polymers with excellent properties, such as ultra-high molecular weight polyethylene and polytetrafluoroethyl...

AI Technical Summary

Problems solved by technology

However, due to the poor thermal conductivity of these polymer powder materials and the gaps between the powder materials, it takes a long time for the heat to conduct to the center of the sintered material, the sintering cycle is long and the efficiency is low; at the same time, in the static sintering process, Due to the action of gravity, powder materials tend to cause uneven distribution of powder materials on the upper surface and uneven distribution of internal pores of the product, thus affecting its surface quality and performance; The temperature difference affects the uniformity of the pores of the product, which in turn affects the performance of the product

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