Porous material dynamic rotary sintering forming method and forming device

Abstract

The invention discloses a porous material dynamic rotary sintering forming method and forming device. The sintering forming device comprises a sintering chamber body, a male die fixed above the sintering chamber body and a female die fixed below the sintering chamber body. A cavity between the male die and the female die forms a material sintering chamber. An electric heating sleeve wraps the sintering forming device. One side of the sintering chamber body is connected with a rotating mechanism through a connecting shaft, and when the rotating mechanism rotates, the sintering forming device synchronously rotates along with the rotating mechanism. According to the forming method, ultra-high molecular weight polyethylene powder is heated and sintered through adopting a dynamic rotary rotating method; in the sintering process, the sintering forming device is always in a rotating state, so that materials are in a motion state, and the problems of non-uniform distribution of pores and uneven upper surface caused by the fact that the materials with large viscosity are in a static state for a long time are avoided; and the materials are evenly heated, so that a product is good in hole forming performance, uniform in porous structure, high in mechanical property and size precision and short in forming period, and operation is simple.

Description

Technical field [0001] The invention relates to the technical field of porous polymer material molding, in particular to a porous material dynamic rotating sintering molding method and a molding device thereof. Background technique [0002] The open-pored porous polymer material has a through three-dimensional network pore structure inside, so the porous material has the advantages of low relative density, high specific strength, light weight, sound insulation, heat insulation, and good permeability. Its application range far exceeds Single-function materials are widely used in biomedicine, filtration separation, permeation and absorption processes in industrial production and life. There are many methods for the preparation of open porous polymer materials, such as melt extrusion stretching method, thermally induced phase separation method, micro foaming method and powder sintering method. For some high molecular polymers with excellent performance, such as ultra-high molecular...

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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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